{"gene":"PTF1A","run_date":"2026-06-10T06:43:36","timeline":{"discoveries":[{"year":1998,"finding":"PTF1A (p48) is the cell-specific DNA-binding subunit of the hetero-oligomeric PTF1 transcription factor complex that directs expression of exocrine pancreatic genes; null mutation in mice abolishes exocrine pancreatic tissue, establishing PTF1A as required for exocrine cell lineage differentiation and/or proliferation.","method":"Gene knockout (null allele generation in mice), histological and molecular analysis of pancreatic tissue","journal":"Genes & development","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean KO with defined cellular phenotype, replicated across multiple subsequent studies","pmids":["9851981"],"is_preprint":false},{"year":2002,"finding":"PTF1A is expressed in multipotent pancreatic progenitors (progenitors of ducts, exocrine, and endocrine cells) at early stages of pancreas development; inactivation of Ptf1a causes pancreatic progenitors to adopt duodenal epithelial fates, establishing PTF1A as required for specification of pancreatic fate from undifferentiated foregut endoderm.","method":"Cre-mediated lineage tracing in vivo, Ptf1a null mouse analysis, transgene-based Pdx1 rescue experiments","journal":"Nature genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal genetic experiments (lineage tracing + KO + rescue), replicated across labs","pmids":["12185368"],"is_preprint":false},{"year":2004,"finding":"Human PTF1A truncating mutations (705insG and C886T) cause pancreatic and cerebellar agenesis; reporter-gene studies with deletion mutants defined a C-terminal domain (beyond the bHLH domain) as crucial for PTF1A function.","method":"Positional cloning, reporter-gene transactivation assays with PTF1A deletion mutants, neuropathological analysis of Ptf1a-/- mice","journal":"Nature genetics","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — functional domain mapping by mutagenesis combined with human genetics and mouse KO validation","pmids":["15543146"],"is_preprint":false},{"year":2004,"finding":"Aortal endothelial cells specifically induce PTF1A expression in dorsal pancreatic endoderm to initiate dorsal pancreatic bud formation; tissue recombination experiments using Flk1-/- embryos lacking endothelial cells demonstrated this induction.","method":"Tissue recombination experiments, Flk1-/- mouse embryos lacking endothelial cells, in situ hybridization","journal":"Development (Cambridge, England)","confidence":"High","confidence_rationale":"Tier 2 / Moderate — tissue recombination with genetic loss-of-function, two orthogonal approaches in one study","pmids":["14736742"],"is_preprint":false},{"year":2005,"finding":"PTF1A is required in cerebellar ventricular zone progenitors to specify GABAergic neuronal fate; loss of Ptf1a (cerebelless mutant) causes failure of GABAergic neuron production; ectopic expression in glutamatergic neuron precursors in dorsal telencephalon converts them to GABAergic neurons with representative morphological and migratory features.","method":"Cerebelless mutant characterization, Cre-mediated lineage tracing, ectopic Ptf1a expression by electroporation","journal":"Neuron","confidence":"High","confidence_rationale":"Tier 2 / Strong — loss-of-function with defined phenotype plus gain-of-function cell fate conversion, replicated across subsequent studies","pmids":["16039563"],"is_preprint":false},{"year":2005,"finding":"PTF1A is required in dorsal spinal cord progenitors for generation of GABAergic interneurons (dI4 and dILA populations marked by Lhx1/5 and Pax2); in Ptf1a null mice, dI4 neurons trans-fate to dI5 (Lmx1b+) and dILA to dILB (Lmx1b+;Tlx3+), establishing PTF1A as a determinant of GABAergic over glutamatergic neuronal fate.","method":"Ptf1a null mouse analysis, immunohistochemistry for interneuron markers, in situ hybridization","journal":"Development (Cambridge, England)","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean KO with defined cell-fate switch phenotype, replicated across labs","pmids":["16291784"],"is_preprint":false},{"year":2006,"finding":"PTF1A forms an active trimeric PTF1 complex with an E-protein (class I bHLH) and either RBPJ or RBPJL; HES family members (Hes1, Hey1, Hey2) directly interact with Ptf1a-p48 through co-immunoprecipitation and GST pulldown, inhibiting PTF1 transcriptional complex activity; the HES-Ptf1a interaction domain was mapped to the bHLH, Orange, and C-terminal domains of Hes1.","method":"Co-immunoprecipitation, yeast two-hybrid, GST pulldown assay, reporter gene transactivation assays","journal":"The Biochemical journal","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — multiple orthogonal binding assays (Co-IP, Y2H, GST pulldown) plus functional reporter assay, single lab","pmids":["16201968"],"is_preprint":false},{"year":2006,"finding":"Ptf1a is expressed by post-mitotic retinal precursors and marks progenitors competent to exclusively produce horizontal and amacrine neurons; inactivation of Ptf1a causes fate-switch of these precursors to ganglion cell fate, resulting in complete loss of horizontal cells and decrease in amacrine cells; Ptf1a is a primary downstream target of the Foxn4 forkhead transcription factor.","method":"Cre-based lineage tracing, Ptf1a null mouse analysis, immunohistochemistry","journal":"Development (Cambridge, England)","confidence":"High","confidence_rationale":"Tier 2 / Strong — lineage tracing plus KO with defined phenotype, confirmed by independent study (PMID 17301087)","pmids":["17075007"],"is_preprint":false},{"year":2007,"finding":"PTF1A occupies the conserved PTF1-binding site within area III of the Pdx1 promoter in E11.5 pancreatic buds; PTF1 specifically trans-activates area III-containing reporter expression, and the PTF1 site contributes to area III-dependent reporter gene expression in acinar AR42J cells.","method":"Chromatin immunoprecipitation (ChIP) from E11.5 pancreatic buds, reporter gene assays in cell lines, in vivo transgenic reporter analysis","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — ChIP from embryonic tissue plus functional reporter assays, two orthogonal methods","pmids":["17403901"],"is_preprint":false},{"year":2007,"finding":"PTF1A is required for differentiation of GABAergic and glycinergic amacrine cells and horizontal cells in mouse retina; Ptf1a-null retinas completely lack GABAergic and glycinergic amacrine cells and horizontal cells, with partial trans-differentiation of Ptf1a-expressing precursors to ganglion cells.","method":"Ptf1a conditional knockout in retina, lineage tracing, immunohistochemistry for cell-type-specific markers","journal":"Development (Cambridge, England)","confidence":"High","confidence_rationale":"Tier 2 / Strong — KO with defined cellular phenotype replicated across multiple studies","pmids":["17301087"],"is_preprint":false},{"year":2007,"finding":"PTF1A is required for climbing fiber neuron development; Ptf1a-expressing progenitors in the dorsolateral caudal hindbrain generate climbing fiber neurons of the inferior olivary nucleus; in Ptf1a null mutants, putative CF neurons fail to migrate/differentiate, ION formation fails, and some cells fate-switch to mossy fiber neurons.","method":"Ptf1a-lacZ knock-in fate mapping, Ptf1a null mouse analysis, retrograde labeling, immunohistochemistry","journal":"The Journal of neuroscience","confidence":"High","confidence_rationale":"Tier 2 / Moderate — genetic fate mapping plus KO phenotype, multiple orthogonal methods in one study","pmids":["17928434"],"is_preprint":false},{"year":2008,"finding":"PTF1A establishes a transcriptional autoregulatory loop via the trimeric PTF1 complex (PTF1A + E protein + RBPJ or RBPJL) binding to two conserved sites in the Ptf1a autoregulatory enhancer; the PTF1 complex also forms dual autoregulatory loops with the Rbpjl gene to maintain stable acinar cell phenotype.","method":"Transgenic reporter assays in mice, EMSA/binding site mutagenesis, ChIP from pancreatic tissue, cell line transfection","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — ChIP from tissue, transgenic reporter with site mutagenesis, and cell transfection, multiple orthogonal methods","pmids":["18606784"],"is_preprint":false},{"year":2008,"finding":"PTF1A acts as a master regulator of glycinergic, peptidergic, and GABAergic transmitter phenotypes in dorsal spinal cord inhibitory neurons; Pax2 is a downstream target of Ptf1a; Ptf1a is required for expression of GlyT2, NPY, N/OFQ, SOM, ENK, DYN, and GAL.","method":"Ptf1a null mouse analysis, in situ hybridization, immunohistochemistry","journal":"Developmental biology","confidence":"High","confidence_rationale":"Tier 2 / Moderate — clean KO with multiple defined molecular readouts","pmids":["18634777"],"is_preprint":false},{"year":2008,"finding":"Nkx6.1/Nkx6.2 and PTF1A function as cross-repressive lineage determinants in multipotent pancreatic progenitors; PTF1A is required and sufficient to repress the endocrine lineage program and specify progenitors toward acinar fate, operating only during a critical competence window.","method":"Genetic loss-of-function and gain-of-function mouse models, lineage tracing","journal":"Developmental cell","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal gain- and loss-of-function epistasis experiments, multiple labs replicated cross-repression concept","pmids":["20627083"],"is_preprint":false},{"year":2009,"finding":"The PTF1-J trimeric complex (PTF1A + E protein + RBPJ) directly regulates Neurog2 expression in the dorsal neural tube through a 3' enhancer containing a required PTF1-J binding site; Ptf1a occupies the Neurog2 enhancer in vivo (ChIP from neural tube tissue), and Neurog2 is the first identified neural target of PTF1A.","method":"ChIP from neural tube tissue, gain/loss of Ptf1a function in vivo (chick and mouse), reporter assays with site mutagenesis","journal":"Development (Cambridge, England)","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — ChIP from tissue, in vivo reporter with mutagenesis, and genetic gain/loss-of-function, multiple orthogonal methods","pmids":["19641016"],"is_preprint":false},{"year":2009,"finding":"PTF1A directly binds to PTF-binding motifs in the 5'-flanking regions of Nephrin and Neph3 genes and activates their transcription; expression of Nephrin and Neph3 is lost in Ptf1a-null mice and induced by forced PTF1A expression, establishing them as direct downstream targets in neural development.","method":"ChIP (direct binding to endogenous loci), reporter gene activation assays, Ptf1a null mouse analysis, gain-of-function","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — ChIP plus reporter assays plus KO and OE validation, multiple orthogonal methods, single lab","pmids":["19887377"],"is_preprint":false},{"year":2009,"finding":"PTF1A-mediated autoregulation in the nervous system requires PTF1-J complex binding to a conserved 5' 2.3 kb autoregulatory element; a separate Ptf1a-independent 12.4 kb 3' regulatory region initiates Ptf1a expression independently of PTF1A, establishing two distinct transcriptional mechanisms controlling Ptf1a levels.","method":"Transgenic reporter assays in mice, in vitro binding assays (PTF1-J complex), Ptf1a null mouse analysis","journal":"The Journal of neuroscience","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — transgenic reporter with in vitro binding and null mouse validation, multiple methods","pmids":["19741120"],"is_preprint":false},{"year":2009,"finding":"The histone acetyltransferase p/CAF interacts with PTF1A (p48) in acinar cells in vivo, is associated with PTF1 target gene promoters, and acetylates PTF1A at Lys200; the K200R mutation abolishes PTF1A transcriptional activity and cooperation with RBP-L, establishing that p/CAF-mediated acetylation is required for full PTF1 transcriptional activity.","method":"Co-immunoprecipitation from acinar cells, ChIP at PTF1 target promoters, site-directed mutagenesis (K200R), reporter gene assays","journal":"The Biochemical journal","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — Co-IP in vivo, ChIP, and functional mutagenesis with multiple orthogonal methods in one study","pmids":["18834332"],"is_preprint":false},{"year":2010,"finding":"Id3 directly interacts with PTF1A (p48) and E47, disrupting E47/PTF1A interaction; gastrin-induced increases in Id3 expression cause cytoplasmic mislocalization of PTF1A in acinar cells; Id3 silencing reverses the gastrin-induced cytoplasmic mislocalization, establishing E47-dependent nuclear import as the mechanism governing PTF1A nuclear localization.","method":"Co-immunoprecipitation, Id3 siRNA knockdown, subcellular localization imaging in AR4-2J acinar cells","journal":"International journal of cancer","confidence":"Medium","confidence_rationale":"Tier 2-3 / Moderate — Co-IP plus knockdown with localization readout, single lab, two orthogonal methods","pmids":["20830706"],"is_preprint":false},{"year":2011,"finding":"PTF1A activates Dll1 expression in multipotent pancreatic progenitor cells, which maintains Hes1 expression and in turn sustains Ptf1a protein levels, forming a Ptf1a-Dll1-Hes1-Ptf1a feedback circuit that promotes MPC proliferation and pancreatic growth; this represents an alternative to classical lateral inhibition.","method":"Genetic mouse mutants (Dll1, Hes1, Ptf1a), epistasis analysis, Neurog3 conditional deletion, BrdU proliferation assay","journal":"Development (Cambridge, England)","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple genetic epistasis combinations with quantitative phenotypic readouts","pmids":["22096075"],"is_preprint":false},{"year":2011,"finding":"In zebrafish, postembryonic antagonism of Ptf1a induces expression of endocrine genes including insulin in exocrine compartment; lineage tracing demonstrates induced insulin+ cells derive from acinar cells, establishing that continuous PTF1A activity is required to maintain acinar cell identity and suppress endocrine fate.","method":"Genetic lineage tracing, postembryonic Ptf1a antagonism, immunohistochemistry","journal":"Current biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — lineage tracing plus loss-of-function with defined molecular readout, single lab","pmids":["21497092"],"is_preprint":false},{"year":2012,"finding":"PTF1A directly regulates Mnx1 (via a distant enhancer), Pdx1, Nkx6.1, and Onecut1 in pancreatic progenitors; ChIP-seq identified PTF1A-bound genomic regions near genes required for pancreas bud maintenance, establishing PTF1A as a direct upstream activator of a transcription factor network for pancreatic progenitor maintenance.","method":"RNA profiling, ChIP-sequencing from pancreatic progenitors, reporter gene assays","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — genome-wide ChIP-seq plus functional reporter validation, single lab","pmids":["22232429"],"is_preprint":false},{"year":2012,"finding":"Rbms3 RNA-binding protein binds to the 3'UTR of Ptf1a mRNA (but not Pdx1 3'UTR) and stimulates Ptf1a translation; knockdown of Rbms3 in AR42J-B13 cells reduces PTF1A expression, establishing post-transcriptional regulation of PTF1A by Rbms3.","method":"RNA pull-down/binding assay, ectopic expression of reporter with Ptf1a 3'UTR, siRNA knockdown in pancreatic cell line","journal":"DNA and cell biology","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — RNA binding assay plus reporter plus knockdown, single lab, multiple methods","pmids":["22372950"],"is_preprint":false},{"year":2013,"finding":"Prdm13 is a direct transcriptional target of the PTF1A-RBPJ complex in the dorsal neural tube; Prdm13 suppresses glutamatergic (Tlx3+) and promotes GABAergic (Pax2+) neuronal fate by blocking Neurog2-mediated Tlx3 activation; Prdm13 also exerts negative autoregulation.","method":"Ptf1a gain/loss-of-function in Xenopus and mice, morpholino knockdown, chick neural tube electroporation, RBPJ complex requirement tested","journal":"Developmental biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — gain and loss of function in two vertebrate models with defined molecular targets, multiple orthogonal methods","pmids":["24370451"],"is_preprint":false},{"year":2013,"finding":"Most PTF1A-bound genomic regions are tissue-specific (pancreas vs. neural tube) and coincide with open chromatin regions; Foxa2 colocalizes with PTF1A in embryonic pancreatic chromatin and acts synergistically with PTF1A in cell transfection assays, establishing lineage-specific chromatin landscape as a constraint on PTF1A binding specificity.","method":"In vivo ChIP-seq from developing pancreas and neural tube, transgenic reporter assays, co-transfection synergy assays, ATAC-seq equivalent open chromatin analysis","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — genome-wide ChIP-seq in two tissues plus transgenic reporter validation plus functional synergy assays","pmids":["23754747"],"is_preprint":false},{"year":2013,"finding":"ICAT (inhibitor of β-catenin and Tcf4) is a novel PTF1A interactor identified by yeast two-hybrid; ICAT overexpression negatively regulates PTF1 activity by direct binding to PTF1A, displacing p/CAF, reducing PTF1A-RBPJl interaction, and impairing PTF1A acetylation, independently of β-catenin.","method":"Yeast two-hybrid screen, in vitro and in vivo co-immunoprecipitation, reporter gene assays, co-immunoprecipitation mapping of interaction","journal":"The Biochemical journal","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — Y2H discovery validated by reciprocal Co-IP and functional reporter assay with mechanistic dissection, single lab","pmids":["23339455"],"is_preprint":false},{"year":2013,"finding":"A retrotransposon (ETn) insertion 12.5 kb upstream of Ptf1a significantly upregulates Ptf1a expression in Danforth's short tail (Sd) mutant embryos at E9.5, and ectopic PTF1A misexpression in the notochord, hindgut, cloaca, and mesonephros causes the Sd phenotype via attenuation of Cdx2 and downstream targets T, Wnt3a, and Cyp26a1.","method":"Next-generation sequencing, Sanger sequencing, knockout and knock-in mouse models, in situ hybridization","journal":"PLoS genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — positional cloning confirmed by multiple KO/KI models and molecular pathway analysis, two concurrent studies","pmids":["23437000","23436999"],"is_preprint":false},{"year":2013,"finding":"PTF1A enhancer mutations in a ~400-bp sequence 25 kb downstream of PTF1A abolish enhancer activity in reporter gene assays; these mutations are the most common cause of isolated pancreatic agenesis.","method":"Whole-genome sequencing, epigenomic annotation in hESC-derived pancreatic progenitors, reporter gene/enhancer activity assays","journal":"Nature genetics","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — functional reporter validation of enhancer activity plus genetic identification in multiple families","pmids":["24212882"],"is_preprint":false},{"year":2014,"finding":"In Ptf1a null mice, cerebellar ventricular zone cells initiate more ventral brainstem expression programs (including Lmx1b and Tlx3), exit the cerebellar anlage, and contribute to adjacent brainstem or die, establishing PTF1A as required to segregate cerebellar from ventral brainstem fates.","method":"Genetic fate mapping in Ptf1a-/- mice, birthdating, gene expression analysis (immunohistochemistry, in situ hybridization)","journal":"Proceedings of the National Academy of Sciences","confidence":"High","confidence_rationale":"Tier 2 / Moderate — genetic fate mapping plus gene expression analysis, single lab with multiple orthogonal methods","pmids":["24733890"],"is_preprint":false},{"year":2014,"finding":"Ectopic expression of Ptf1a in glutamatergic neuron precursors in the cerebellar rhombic lip converts them to produce GABAergic populations (Purkinje cells and GABAergic interneurons); Ptf1a and Atoh1 mutually negatively regulate each other's expression, establishing PTF1A as both necessary and sufficient for GABAergic specification in cerebellar neuroepithelium.","method":"Knock-in mouse lines (Ptf1a-Atoh1 and Atoh1-Ptf1a), in utero electroporation, BrdU birthdating","journal":"The Journal of neuroscience","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal knock-in genetics plus electroporation, two orthogonal methods establishing sufficiency and mutual repression","pmids":["24695699"],"is_preprint":false},{"year":2015,"finding":"PTF1A expression is lost in mouse and human pancreatic intraepithelial neoplasia (PanIN); PTF1A loss alone is sufficient to induce acinar-to-ductal metaplasia and a KRAS-permissive gene expression profile; Ptf1a-deficient acinar cells are dramatically sensitized to KRAS transformation, establishing PTF1A as a tumor suppressor in pancreas.","method":"Conditional Ptf1a knockout in mice, histological analysis, gene expression profiling (RNA-seq), KRAS combination mouse models","journal":"eLife","confidence":"High","confidence_rationale":"Tier 2 / Strong — conditional KO with defined phenotype, genetic epistasis with KRAS, transcriptomics, and human tissue validation","pmids":["26151762"],"is_preprint":false},{"year":2015,"finding":"Tfap2a and Tfap2b are major downstream effectors of PTF1A in retinal amacrine cell differentiation; their expression is dramatically downregulated in Ptf1a null retina; overexpression promotes glycinergic and GABAergic amacrine cell differentiation, while simultaneous knockdown has opposite effects, establishing a Foxn4/RORβ1-Ptf1a-Tfap2a/2b regulatory cascade.","method":"RNA-seq, immunolabeling in Ptf1a null retina, overexpression and knockdown experiments in mouse retinas","journal":"Molecular brain","confidence":"High","confidence_rationale":"Tier 2 / Moderate — KO transcriptomics plus gain and loss of function of downstream targets, multiple methods","pmids":["25966682"],"is_preprint":false},{"year":2015,"finding":"PTF1a-Rbpj/Ptf1a complex drives Dll1 expression in multipotent pancreatic progenitors via direct Ptf1a-mediated transcriptional control; Hes1 is required to sustain Ptf1a expression levels in early MPCs.","method":"Already captured in PMID 22096075; see above","journal":"Development (Cambridge, England)","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — single lab finding from the Ptf1a-Dll1 circuit paper; already captured in 2011 entry","pmids":["22096075"],"is_preprint":false},{"year":2016,"finding":"PTF1A directly maintains expression of genes for secretory digestive enzyme production, UPR surveillance, and a ten-member transcription factor network in adult acinar cells; PTF1A depletion causes UPR imbalance, cellular injury, acinar metaplasia, and derepression of stomach-characteristic genes, establishing PTF1A as a direct transcriptional maintainer of acinar cell identity.","method":"RNA-seq and ChIP-seq from adult pancreas after Ptf1a conditional depletion in vivo","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — genome-wide ChIP-seq plus transcriptomics in conditional KO, multiple orthogonal methods","pmids":["27697859"],"is_preprint":false},{"year":2016,"finding":"A highly conserved distal 3' enhancer (10.8 kb downstream of Ptf1a) drives expression in dorsal neural tube progenitors; Paired homeodomain binding motifs are required for activator function and zinc finger motifs for repressor function; PAX6 and SOX3 can increase enhancer activity in reporter assays.","method":"Transgenic reporter assays in chick and mouse, site-directed mutagenesis of binding motifs, transfection reporter assays","journal":"Developmental biology","confidence":"Medium","confidence_rationale":"Tier 1-2 / Moderate — transgenic reporter with mutagenesis, single lab, two orthogonal methods","pmids":["27350561"],"is_preprint":false},{"year":2018,"finding":"PTF1A alone is sufficient to directly reprogram mouse and human fibroblasts into self-renewable induced neural stem cells; this reprogramming depends on PTF1A's Notch-independent interaction with Rbpj, which leads to activation of TF genes and Notch signaling required for NSC specification and self-renewal.","method":"Direct reprogramming of fibroblasts, Co-IP for PTF1A-Rbpj interaction, transcriptome analysis, transplantation into AD mouse models","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 / Moderate — reprogramming in two species, Co-IP for mechanism, functional transplantation readout","pmids":["30030434"],"is_preprint":false},{"year":2018,"finding":"Homozygous deletion of Ptf1a in adult acinar cells causes severe apoptosis mediated through endoplasmic reticulum stress via the ATF6 and PERK (but not IRE1) UPR pathways, with CHOP upregulation as the pro-apoptotic signal.","method":"Elastase-CreERTM; Ptf1a-floxed/floxed conditional KO, electron microscopy, western blot for UPR pathway components","journal":"Scientific reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — conditional homozygous KO with EM and molecular pathway dissection, single lab","pmids":["30361559"],"is_preprint":false},{"year":2018,"finding":"Ptf1a is expressed in neuroepithelial cells and immature neurons around the third ventricle giving rise to hypothalamic neurons; conditional Ptf1a deficiency causes abnormal sex-biased behaviors, and Kiss1 expression is drastically reduced in the cKO hypothalamus, establishing PTF1A as a regulator of hypothalamic sexual differentiation.","method":"Conditional Ptf1a knockout, behavioral testing, gonadal hormone administration to gonadectomized mice, gene expression analysis","journal":"Cell reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — conditional KO with defined behavioral and molecular phenotype, single lab","pmids":["29972793"],"is_preprint":false},{"year":2020,"finding":"Positive transcriptional autoregulatory feedback through the PTF1A autoregulatory enhancer is required to attain PTF1A levels necessary for specifying Pdyn+ and Gal+ inhibitory dorsal spinal cord interneurons; mutations in the autoregulatory enhancer reduce PTF1A levels and cause a severe itch phenotype with increased sensitivity to itch but unaffected acute pain sensitivity.","method":"Targeted mutations in Ptf1a cis-regulatory elements in mice, quantitative analysis of neuronal populations, behavioral testing (itch, mechanical, thermal pain)","journal":"Genes & development","confidence":"High","confidence_rationale":"Tier 2 / Strong — precise cis-regulatory mutagenesis with quantitative neuronal and behavioral phenotypes, mechanistically informative","pmids":["32241803"],"is_preprint":false},{"year":2020,"finding":"A spinal subpopulation of Ptf1a-derived inhibitory neurons gates mechanosensory information self-generated during movement; these neurons receive tactile and motor input and establish presynaptic inhibitory contacts on mechanosensory afferents; loss of Ptf1a neurons leads to increased hairy skin sensitivity and chronic itch partially mediated by GRPR spinal neurons.","method":"Conditional Ptf1a neuron ablation/inactivation, anatomical tracing, chemogenetic activation (DREADD), behavioral testing","journal":"Cell reports","confidence":"High","confidence_rationale":"Tier 2 / Moderate — genetic ablation plus chemogenetics with defined circuit and behavioral phenotypes, single lab","pmids":["33238109"],"is_preprint":false},{"year":2024,"finding":"During PTF1A-mediated fibroblast-to-NSC transdifferentiation, PTF1A binds to subTAD boundaries associated with elevated CTCF binding and enhanced boundary insulation, reorganizes chromatin loops, activates enhancers and super-enhancers near low-insulation boundaries, and modulates H3K27ac deposition to drive gene expression changes.","method":"Hi-C, ChIP-seq (PTF1A, CTCF, H3K27ac), RNA-seq multiomics integration","journal":"Communications biology","confidence":"Medium","confidence_rationale":"Tier 1-2 / Moderate — genome-wide multiomics with multiple data types, single lab, no functional mutagenesis validation of specific boundaries","pmids":["39537822"],"is_preprint":false}],"current_model":"PTF1A is a lineage-determining bHLH transcription factor that functions as the DNA-binding subunit of the trimeric PTF1 complex (PTF1A + E-protein + RBPJ or RBPJL); it directly activates target genes (including Pdx1, Mnx1, Neurog2, Nephrin, Neph3, Dll1, and exocrine enzyme genes), establishes transcriptional autoregulatory feedback loops, and requires p/CAF-mediated acetylation at Lys200 for full activity, while being inhibited by HES/Hey proteins and Id3 through direct protein–protein interactions; in the pancreas PTF1A specifies multipotent progenitors and then maintains acinar cell identity (preventing acinar-to-ductal metaplasia and KRAS-driven tumorigenesis), and in the nervous system it functions as a broad determinant of GABAergic/inhibitory over glutamatergic/excitatory neuronal fate in the cerebellum, spinal cord, retina, brainstem, and hypothalamus."},"narrative":{"mechanistic_narrative":"PTF1A (p48) is a lineage-determining basic helix-loop-helix transcription factor that functions as the cell-specific DNA-binding subunit of the trimeric PTF1 complex, which it forms with a class I E-protein and either RBPJ or RBPJL [PMID:9851981, PMID:16201968]. Through this complex it directs two distinct developmental programs: specification and maintenance of pancreatic exocrine (acinar) identity, and specification of GABAergic/inhibitory over glutamatergic/excitatory neuronal fate across the cerebellum, spinal cord, retina, brainstem, and hypothalamus [PMID:16039563, PMID:16291784, PMID:24733890]. In the pancreas, PTF1A is induced in foregut endoderm by aortic endothelial signals and is required to specify pancreatic fate from undifferentiated progenitors, which otherwise adopt duodenal fates [PMID:12185368, PMID:14736742]; it then acts as a cross-repressive determinant that drives acinar over endocrine programs and, in the adult, directly maintains digestive-enzyme, UPR-surveillance, and acinar transcription-factor network genes [PMID:20627083, PMID:27697859]. Loss of PTF1A in adult acinar cells triggers ER-stress apoptosis, acinar-to-ductal metaplasia, and a KRAS-permissive state, establishing it as a pancreatic tumor suppressor [PMID:26151762, PMID:30361559]. PTF1A binds direct genomic targets including Pdx1, Mnx1, Nkx6.1, Onecut1, Dll1, Neurog2, Prdm13, Nephrin and Neph3, and sustains its own expression through PTF1-complex autoregulatory enhancers that set the protein levels needed for correct cell-fate output [PMID:17403901, PMID:22232429, PMID:22096075, PMID:19641016, PMID:24370451, PMID:19887377, PMID:18606784, PMID:32241803]. Its binding specificity is constrained by tissue-specific open chromatin and cooperating factors such as Foxa2 [PMID:23754747]. PTF1A activity requires p/CAF-mediated acetylation at Lys200 and is antagonized by HES/Hey proteins, Id3, and ICAT through direct protein interactions, with Id3 controlling E47-dependent nuclear localization [PMID:18834332, PMID:16201968, PMID:20830706, PMID:23339455]. Human truncating mutations and enhancer mutations cause pancreatic and cerebellar agenesis or isolated pancreatic agenesis [PMID:15543146, PMID:24212882].","teleology":[{"year":1998,"claim":"Established that PTF1A is an essential cell-type-specific transcription factor for the exocrine pancreatic lineage, defining its core developmental requirement.","evidence":"Null allele knockout in mice with histological analysis of pancreatic tissue","pmids":["9851981"],"confidence":"High","gaps":["Did not resolve whether the defect was specification, differentiation, or proliferation","No direct target genes identified at this stage"]},{"year":2002,"claim":"Showed PTF1A acts upstream in multipotent progenitors to specify pancreatic versus duodenal fate, broadening its role beyond exocrine differentiation.","evidence":"Cre lineage tracing, Ptf1a null analysis, and Pdx1 transgene rescue in mice","pmids":["12185368"],"confidence":"High","gaps":["Direct PTF1A targets driving fate choice not yet defined","Inductive signals turning on Ptf1a unknown"]},{"year":2004,"claim":"Linked PTF1A to human disease and mapped a functionally critical C-terminal domain beyond the bHLH, while extending its requirement to the cerebellum.","evidence":"Positional cloning of truncating mutations, deletion-mutant reporter assays, mouse neuropathology","pmids":["15543146"],"confidence":"High","gaps":["Molecular role of the C-terminal domain not defined","Neuronal targets unidentified"]},{"year":2004,"claim":"Identified the upstream inductive signal, showing aortic endothelium triggers PTF1A expression to initiate dorsal pancreatic budding.","evidence":"Tissue recombination with Flk1-/- endothelium-deficient embryos and in situ hybridization","pmids":["14736742"],"confidence":"High","gaps":["Molecular identity of the endothelial signal not defined","Transcriptional intermediaries linking signal to Ptf1a unknown"]},{"year":2005,"claim":"Generalized PTF1A as a determinant of GABAergic over glutamatergic neuronal fate, demonstrating both necessity and sufficiency in CNS progenitors.","evidence":"Cerebelless and null mutant analysis, lineage tracing, and ectopic expression by electroporation in cerebellum and spinal cord","pmids":["16039563","16291784"],"confidence":"High","gaps":["Direct neural target genes not yet identified","Whether the same PTF1 complex operates in neurons not yet shown"]},{"year":2006,"claim":"Defined the biochemical complex and its negative regulators, establishing PTF1A as a DNA-binding subunit inhibited by direct HES/Hey binding.","evidence":"Co-IP, yeast two-hybrid, GST pulldown, and reporter assays mapping the trimeric PTF1 complex and HES interaction domains","pmids":["16201968"],"confidence":"High","gaps":["In vivo relevance of HES inhibition to specific tissues not tested","Stoichiometry and structure of the complex unresolved"]},{"year":2007,"claim":"Extended PTF1A's inhibitory-neuron specification role to the retina and climbing-fiber neurons and placed it downstream of Foxn4.","evidence":"Conditional knockout, lineage tracing, fate mapping, and immunohistochemistry in retina and hindbrain","pmids":["17075007","17301087","17928434"],"confidence":"High","gaps":["Direct retinal/hindbrain targets not defined here","Mechanism of partial trans-differentiation unclear"]},{"year":2008,"claim":"Demonstrated direct genomic occupancy and autoregulation, showing PTF1A binds the Pdx1 area III and its own enhancer to lock in acinar identity.","evidence":"ChIP from embryonic pancreas, transgenic reporters with site mutagenesis, EMSA, and cell transfection","pmids":["17403901","18606784"],"confidence":"High","gaps":["Genome-wide target set not yet defined","Quantitative contribution of autoregulation to cell-fate thresholds unresolved"]},{"year":2008,"claim":"Established PTF1A as a cross-repressive lineage switch with Nkx6 factors operating within a defined competence window.","evidence":"Reciprocal gain- and loss-of-function mouse models and lineage tracing","pmids":["20627083","18634777"],"confidence":"High","gaps":["Mechanism of the competence window not defined","Direct repressed endocrine targets not enumerated"]},{"year":2009,"claim":"Identified the first direct neural targets and the regulatory grammar controlling Ptf1a levels, unifying its pancreatic and neural mechanisms.","evidence":"ChIP from neural tube, in vivo gain/loss of function in chick and mouse, reporter mutagenesis for Neurog2, Nephrin, Neph3 and autoregulatory elements","pmids":["19641016","19887377","19741120"],"confidence":"High","gaps":["Full neural target repertoire incomplete","How initiation versus maintenance enhancers are switched not resolved"]},{"year":2009,"claim":"Showed PTF1A activity is post-translationally gated by p/CAF acetylation at Lys200, required for full transcriptional output.","evidence":"Co-IP from acinar cells, ChIP at target promoters, and K200R mutagenesis with reporter assays","pmids":["18834332"],"confidence":"High","gaps":["Deacetylase counter-regulator not identified","In vivo phenotype of acetylation-defective PTF1A not tested"]},{"year":2010,"claim":"Defined Id3 as a regulator of PTF1A subcellular localization, linking gastrin signaling to cytoplasmic mislocalization of PTF1A.","evidence":"Co-IP, Id3 siRNA, and subcellular imaging in AR4-2J acinar cells","pmids":["20830706"],"confidence":"Medium","gaps":["Single lab, two-method study without in vivo validation","Direct nuclear import machinery not identified"]},{"year":2011,"claim":"Uncovered a Ptf1a-Dll1-Hes1 feedback circuit promoting progenitor proliferation, and showed continuous PTF1A is required to maintain acinar identity.","evidence":"Genetic epistasis mouse models, BrdU proliferation assays, and zebrafish lineage tracing under Ptf1a antagonism","pmids":["22096075","21497092"],"confidence":"High","gaps":["The zebrafish maintenance result is single-lab","How the circuit balances proliferation versus differentiation not fully resolved"]},{"year":2012,"claim":"Mapped the genome-wide pancreatic target network, establishing PTF1A as a direct upstream activator of the progenitor transcription-factor program.","evidence":"ChIP-seq and RNA profiling from pancreatic progenitors with reporter validation of Mnx1, Pdx1, Nkx6.1, Onecut1","pmids":["22232429","22372950"],"confidence":"High","gaps":["Rbms3 post-transcriptional control is single-lab","Hierarchy among co-regulated targets not resolved"]},{"year":2013,"claim":"Explained tissue-specific binding and identified a key neural effector, showing chromatin accessibility and Foxa2 constrain PTF1A while Prdm13 enforces inhibitory fate downstream.","evidence":"ChIP-seq in pancreas and neural tube, open-chromatin analysis, co-transfection synergy, and gain/loss of function for Prdm13 in Xenopus and mouse","pmids":["23754747","24370451","23339455"],"confidence":"High","gaps":["Determinants directing PTF1A to tissue-specific open chromatin not fully defined","ICAT regulation tested largely in vitro"]},{"year":2013,"claim":"Established that ectopic or mislocalized PTF1A expression causes disease, and that human enhancer mutations are a major cause of isolated pancreatic agenesis.","evidence":"KO/KI mouse models of an ETn insertion (Danforth's short tail) and whole-genome sequencing plus enhancer reporter assays in human pancreatic agenesis","pmids":["23437000","23436999","24212882"],"confidence":"High","gaps":["Endogenous factors normally restraining ectopic Ptf1a expression not defined","How the distal enhancer integrates upstream inputs incomplete"]},{"year":2015,"claim":"Defined PTF1A as a pancreatic tumor suppressor whose loss creates a KRAS-permissive metaplastic state.","evidence":"Conditional knockout, RNA-seq, KRAS combination mouse models, and human PanIN tissue analysis","pmids":["26151762","25966682"],"confidence":"High","gaps":["Direct transcriptional targets mediating tumor suppression not fully mapped","Whether restoring PTF1A reverses metaplasia not tested"]},{"year":2016,"claim":"Showed adult acinar identity is actively maintained by direct PTF1A control of digestive-enzyme, UPR, and transcription-factor network genes.","evidence":"RNA-seq and ChIP-seq from adult pancreas after conditional Ptf1a depletion","pmids":["27697859"],"confidence":"High","gaps":["Order of events from PTF1A loss to metaplasia not resolved","Cofactor changes accompanying maintenance not defined"]},{"year":2018,"claim":"Demonstrated PTF1A alone reprograms fibroblasts into induced neural stem cells via Notch-independent Rbpj interaction, revealing potent fate-instructive capacity.","evidence":"Direct reprogramming of mouse and human fibroblasts, Co-IP, transcriptomics, and transplantation","pmids":["30030434"],"confidence":"High","gaps":["Genome-wide reprogramming targets not yet mapped at this stage","Efficiency-limiting cofactors unknown"]},{"year":2018,"claim":"Linked acute PTF1A loss to ER-stress apoptosis and extended its role to hypothalamic sexual differentiation.","evidence":"Conditional homozygous knockout with EM and UPR western blots; conditional KO with behavioral and Kiss1 expression analysis","pmids":["30361559","29972793"],"confidence":"Medium","gaps":["Both findings are single-lab","Direct PTF1A targets in the UPR and hypothalamic programs not defined"]},{"year":2020,"claim":"Showed autoregulatory feedback sets the PTF1A dose required to specify specific inhibitory interneuron subtypes that gate itch and movement-related sensory information.","evidence":"Targeted cis-regulatory mutations, neuron ablation/chemogenetics, anatomical tracing, and behavioral testing in mice","pmids":["32241803","33238109"],"confidence":"High","gaps":["Quantitative dose-response between PTF1A levels and subtype output not fully defined","Circuit downstream of these neurons partially characterized"]},{"year":2024,"claim":"Began defining how PTF1A reorganizes chromatin architecture, binding subTAD boundaries and modulating enhancers during fate transitions.","evidence":"Hi-C, ChIP-seq (PTF1A, CTCF, H3K27ac), and RNA-seq multiomics during fibroblast-to-NSC transdifferentiation","pmids":["39537822"],"confidence":"Medium","gaps":["No functional mutagenesis of specific boundaries","Causality between boundary binding and gene activation not established"]},{"year":null,"claim":"How PTF1A protein dosage, post-translational modification, cofactor availability, and 3D chromatin remodeling are integrated to select between the pancreatic and neural transcriptional programs in different tissues remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["Structural basis of PTF1 trimer assembly and DNA recognition undefined","Determinants that pioneer or constrain PTF1A access to tissue-specific chromatin incompletely mapped","Mechanism switching PTF1A between RBPJ- and RBPJL-containing complexes not resolved"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[0,6,8,11,14,21,33]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[0,8,14,15,21,24]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[18]}],"pathway":[{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[1,4,5,13]},{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[0,8,11,21,33]},{"term_id":"R-HSA-112316","term_label":"Neuronal System","supporting_discovery_ids":[4,5,12,38]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[2,27,30]},{"term_id":"R-HSA-4839726","term_label":"Chromatin organization","supporting_discovery_ids":[24,40]}],"complexes":["PTF1 complex (PTF1A-E protein-RBPJ/RBPJL)"],"partners":["RBPJ","RBPJL","HES1","P/CAF","ID3","ICAT","FOXA2"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q7RTS3","full_name":"Pancreas transcription factor 1 subunit alpha","aliases":["Class A basic helix-loop-helix protein 29","bHLHa29","Pancreas-specific transcription factor 1a","bHLH transcription factor p48","p48 DNA-binding subunit of transcription factor PTF1","PTF1-p48"],"length_aa":328,"mass_kda":35.0,"function":"Transcription factor implicated in the cell fate determination in various organs. Binds to the E-box consensus sequence 5'-CANNTG-3'. Plays a role in early and late pancreas development and differentiation. Important for determining whether cells allocated to the pancreatic buds continue towards pancreatic organogenesis or revert back to duodenal fates. May be involved in the maintenance of exocrine pancreas-specific gene expression including ELA1 and amylase. Required for the formation of pancreatic acinar and ductal cells. Plays an important role in cerebellar development. Directly regulated by FOXN4 and RORC during retinal development, FOXN4-PTF1A pathway plays a central role in directing the differentiation of retinal progenitors towards horizontal and amacrine fates","subcellular_location":"Nucleus; Cytoplasm","url":"https://www.uniprot.org/uniprotkb/Q7RTS3/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/PTF1A","classification":"Not Classified","n_dependent_lines":2,"n_total_lines":1208,"dependency_fraction":0.0016556291390728477},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/PTF1A","total_profiled":1310},"omim":[{"mim_id":"619909","title":"PONTOCEREBELLAR HYPOPLASIA, TYPE 17; PCH17","url":"https://www.omim.org/entry/619909"},{"mim_id":"618500","title":"HOLOPROSENCEPHALY 12 WITH OR WITHOUT PANCREATIC AGENESIS; HPE12","url":"https://www.omim.org/entry/618500"},{"mim_id":"616741","title":"PR DOMAIN-CONTAINING PROTEIN 13; PRDM13","url":"https://www.omim.org/entry/616741"},{"mim_id":"616104","title":"RBPJ-LIKE PROTEIN; RBPJL","url":"https://www.omim.org/entry/616104"},{"mim_id":"615935","title":"PANCREATIC AGENESIS 2; PAGEN2","url":"https://www.omim.org/entry/615935"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Nucleoplasm","reliability":"Approved"}],"tissue_specificity":"Tissue enriched","tissue_distribution":"Detected in some","driving_tissues":[{"tissue":"pancreas","ntpm":99.1}],"url":"https://www.proteinatlas.org/search/PTF1A"},"hgnc":{"alias_symbol":["PTF1-p48","bHLHa29","p48"],"prev_symbol":[]},"alphafold":{"accession":"Q7RTS3","domains":[{"cath_id":"4.10.280.10","chopping":"157-223","consensus_level":"medium","plddt":93.1437,"start":157,"end":223}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q7RTS3","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q7RTS3-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q7RTS3-F1-predicted_aligned_error_v6.png","plddt_mean":60.38},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=PTF1A","jax_strain_url":"https://www.jax.org/strain/search?query=PTF1A"},"sequence":{"accession":"Q7RTS3","fasta_url":"https://rest.uniprot.org/uniprotkb/Q7RTS3.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q7RTS3/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q7RTS3"}},"corpus_meta":[{"pmid":"12185368","id":"PMC_12185368","title":"The role of the transcriptional regulator Ptf1a in converting intestinal to pancreatic progenitors.","date":"2002","source":"Nature genetics","url":"https://pubmed.ncbi.nlm.nih.gov/12185368","citation_count":808,"is_preprint":false},{"pmid":"9851981","id":"PMC_9851981","title":"The bHLH protein PTF1-p48 is essential for the formation of the exocrine and the correct spatial organization of the endocrine pancreas.","date":"1998","source":"Genes & development","url":"https://pubmed.ncbi.nlm.nih.gov/9851981","citation_count":417,"is_preprint":false},{"pmid":"16039563","id":"PMC_16039563","title":"Ptf1a, a bHLH transcriptional gene, defines GABAergic neuronal fates in cerebellum.","date":"2005","source":"Neuron","url":"https://pubmed.ncbi.nlm.nih.gov/16039563","citation_count":390,"is_preprint":false},{"pmid":"15543146","id":"PMC_15543146","title":"Mutations in PTF1A cause pancreatic and cerebellar agenesis.","date":"2004","source":"Nature genetics","url":"https://pubmed.ncbi.nlm.nih.gov/15543146","citation_count":312,"is_preprint":false},{"pmid":"23325761","id":"PMC_23325761","title":"Spatiotemporal patterns of multipotentiality in Ptf1a-expressing cells during pancreas organogenesis and injury-induced facultative restoration.","date":"2013","source":"Development (Cambridge, England)","url":"https://pubmed.ncbi.nlm.nih.gov/23325761","citation_count":240,"is_preprint":false},{"pmid":"20627083","id":"PMC_20627083","title":"Nkx6 transcription factors and Ptf1a function as antagonistic lineage determinants in multipotent pancreatic progenitors.","date":"2010","source":"Developmental cell","url":"https://pubmed.ncbi.nlm.nih.gov/20627083","citation_count":223,"is_preprint":false},{"pmid":"24212882","id":"PMC_24212882","title":"Recessive mutations in a distal PTF1A enhancer cause isolated pancreatic agenesis.","date":"2013","source":"Nature genetics","url":"https://pubmed.ncbi.nlm.nih.gov/24212882","citation_count":211,"is_preprint":false},{"pmid":"17075007","id":"PMC_17075007","title":"Ptf1a determines horizontal and amacrine cell fates during mouse retinal development.","date":"2006","source":"Development (Cambridge, England)","url":"https://pubmed.ncbi.nlm.nih.gov/17075007","citation_count":199,"is_preprint":false},{"pmid":"14736742","id":"PMC_14736742","title":"Endothelial cell interactions initiate dorsal pancreas development by selectively inducing the transcription factor Ptf1a.","date":"2004","source":"Development (Cambridge, England)","url":"https://pubmed.ncbi.nlm.nih.gov/14736742","citation_count":195,"is_preprint":false},{"pmid":"16291784","id":"PMC_16291784","title":"Ptf1a determines GABAergic over glutamatergic neuronal cell fate in the spinal cord dorsal horn.","date":"2005","source":"Development (Cambridge, England)","url":"https://pubmed.ncbi.nlm.nih.gov/16291784","citation_count":183,"is_preprint":false},{"pmid":"17301087","id":"PMC_17301087","title":"Ptf1a is essential for the differentiation of GABAergic and glycinergic amacrine cells and horizontal cells in the mouse retina.","date":"2007","source":"Development (Cambridge, England)","url":"https://pubmed.ncbi.nlm.nih.gov/17301087","citation_count":169,"is_preprint":false},{"pmid":"18294628","id":"PMC_18294628","title":"Pdx-1 and Ptf1a concurrently determine fate specification of pancreatic multipotent progenitor cells.","date":"2008","source":"Developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/18294628","citation_count":151,"is_preprint":false},{"pmid":"26151762","id":"PMC_26151762","title":"The acinar differentiation determinant PTF1A inhibits initiation of pancreatic ductal adenocarcinoma.","date":"2015","source":"eLife","url":"https://pubmed.ncbi.nlm.nih.gov/26151762","citation_count":131,"is_preprint":false},{"pmid":"17360405","id":"PMC_17360405","title":"Cerebellar GABAergic progenitors adopt an external granule cell-like phenotype in the absence of Ptf1a transcription factor expression.","date":"2007","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/17360405","citation_count":129,"is_preprint":false},{"pmid":"15031114","id":"PMC_15031114","title":"Evolutionary conserved role of ptf1a in the specification of exocrine pancreatic fates.","date":"2004","source":"Developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/15031114","citation_count":91,"is_preprint":false},{"pmid":"16751182","id":"PMC_16751182","title":"Combined ectopic expression of Pdx1 and Ptf1a/p48 results in the stable conversion of posterior endoderm into endocrine and exocrine pancreatic tissue.","date":"2006","source":"Genes & development","url":"https://pubmed.ncbi.nlm.nih.gov/16751182","citation_count":83,"is_preprint":false},{"pmid":"18634777","id":"PMC_18634777","title":"Ptf1a, Lbx1 and Pax2 coordinate glycinergic and peptidergic transmitter phenotypes in dorsal spinal inhibitory neurons.","date":"2008","source":"Developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/18634777","citation_count":82,"is_preprint":false},{"pmid":"18606784","id":"PMC_18606784","title":"Transcriptional autoregulation controls pancreatic Ptf1a expression during development and adulthood.","date":"2008","source":"Molecular and cellular biology","url":"https://pubmed.ncbi.nlm.nih.gov/18606784","citation_count":80,"is_preprint":false},{"pmid":"17928434","id":"PMC_17928434","title":"Origin of climbing fiber neurons and their developmental dependence on Ptf1a.","date":"2007","source":"The Journal of neuroscience : the official journal of the Society for Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/17928434","citation_count":79,"is_preprint":false},{"pmid":"24695699","id":"PMC_24695699","title":"Specification of spatial identities of cerebellar neuron progenitors by ptf1a and atoh1 for proper production of GABAergic and glutamatergic neurons.","date":"2014","source":"The Journal of neuroscience : the official journal of the Society for Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/24695699","citation_count":73,"is_preprint":false},{"pmid":"19732413","id":"PMC_19732413","title":"Ptf1a is expressed transiently in all types of amacrine cells in the embryonic zebrafish retina.","date":"2009","source":"Neural development","url":"https://pubmed.ncbi.nlm.nih.gov/19732413","citation_count":73,"is_preprint":false},{"pmid":"18519637","id":"PMC_18519637","title":"Graded levels of Ptf1a differentially regulate endocrine and exocrine fates in the developing pancreas.","date":"2008","source":"Genes & development","url":"https://pubmed.ncbi.nlm.nih.gov/18519637","citation_count":72,"is_preprint":false},{"pmid":"30030434","id":"PMC_30030434","title":"Direct reprogramming of fibroblasts into neural stem cells by single non-neural progenitor transcription factor Ptf1a.","date":"2018","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/30030434","citation_count":72,"is_preprint":false},{"pmid":"17403901","id":"PMC_17403901","title":"Ptf1a binds to and activates area III, a highly conserved region of the Pdx1 promoter that mediates early pancreas-wide Pdx1 expression.","date":"2007","source":"Molecular and cellular biology","url":"https://pubmed.ncbi.nlm.nih.gov/17403901","citation_count":70,"is_preprint":false},{"pmid":"27697859","id":"PMC_27697859","title":"Transcriptional Maintenance of Pancreatic Acinar Identity, Differentiation, and Homeostasis by PTF1A.","date":"2016","source":"Molecular and cellular biology","url":"https://pubmed.ncbi.nlm.nih.gov/27697859","citation_count":65,"is_preprint":false},{"pmid":"15183727","id":"PMC_15183727","title":"Differential requirement for ptf1a in endocrine and exocrine lineages of developing zebrafish pancreas.","date":"2004","source":"Developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/15183727","citation_count":63,"is_preprint":false},{"pmid":"15570689","id":"PMC_15570689","title":"Differential requirement for ptf1a in endocrine and exocrine lineages of developing zebrafish pancreas.","date":"2004","source":"Developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/15570689","citation_count":62,"is_preprint":false},{"pmid":"17910758","id":"PMC_17910758","title":"Ptf1a triggers GABAergic neuronal cell fates in the retina.","date":"2007","source":"BMC developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/17910758","citation_count":59,"is_preprint":false},{"pmid":"18591390","id":"PMC_18591390","title":"Reduction of Ptf1a gene dosage causes pancreatic hypoplasia and diabetes in mice.","date":"2008","source":"Diabetes","url":"https://pubmed.ncbi.nlm.nih.gov/18591390","citation_count":58,"is_preprint":false},{"pmid":"25966682","id":"PMC_25966682","title":"Tfap2a and 2b act downstream of Ptf1a to promote amacrine cell differentiation during retinogenesis.","date":"2015","source":"Molecular brain","url":"https://pubmed.ncbi.nlm.nih.gov/25966682","citation_count":58,"is_preprint":false},{"pmid":"22096075","id":"PMC_22096075","title":"Ptf1a-mediated control of Dll1 reveals an alternative to the lateral inhibition mechanism.","date":"2011","source":"Development (Cambridge, England)","url":"https://pubmed.ncbi.nlm.nih.gov/22096075","citation_count":55,"is_preprint":false},{"pmid":"18347078","id":"PMC_18347078","title":"Generation and characterization of Ptf1a antiserum and localization of Ptf1a in relation to Nkx6.1 and Pdx1 during the earliest stages of mouse pancreas development.","date":"2008","source":"The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society","url":"https://pubmed.ncbi.nlm.nih.gov/18347078","citation_count":51,"is_preprint":false},{"pmid":"19641016","id":"PMC_19641016","title":"Neurog2 is a direct downstream target of the Ptf1a-Rbpj transcription complex in dorsal spinal cord.","date":"2009","source":"Development (Cambridge, England)","url":"https://pubmed.ncbi.nlm.nih.gov/19641016","citation_count":48,"is_preprint":false},{"pmid":"21497092","id":"PMC_21497092","title":"Suppression of Ptf1a activity induces acinar-to-endocrine conversion.","date":"2011","source":"Current biology : CB","url":"https://pubmed.ncbi.nlm.nih.gov/21497092","citation_count":48,"is_preprint":false},{"pmid":"17320068","id":"PMC_17320068","title":"Differential ability of Ptf1a and Ptf1a-VP16 to convert stomach, duodenum and liver to pancreas.","date":"2007","source":"Developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/17320068","citation_count":46,"is_preprint":false},{"pmid":"22232429","id":"PMC_22232429","title":"RNA profiling and chromatin immunoprecipitation-sequencing reveal that PTF1a stabilizes pancreas progenitor identity via the control of MNX1/HLXB9 and a network of other transcription factors.","date":"2012","source":"Molecular and cellular biology","url":"https://pubmed.ncbi.nlm.nih.gov/22232429","citation_count":45,"is_preprint":false},{"pmid":"30470852","id":"PMC_30470852","title":"Transcription factor Ptf1a in development, diseases and reprogramming.","date":"2018","source":"Cellular and molecular life sciences : CMLS","url":"https://pubmed.ncbi.nlm.nih.gov/30470852","citation_count":42,"is_preprint":false},{"pmid":"24370451","id":"PMC_24370451","title":"The Prdm13 histone methyltransferase encoding gene is a Ptf1a-Rbpj downstream target that suppresses glutamatergic and promotes GABAergic neuronal fate in the dorsal neural tube.","date":"2013","source":"Developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/24370451","citation_count":42,"is_preprint":false},{"pmid":"24733890","id":"PMC_24733890","title":"Transformation of the cerebellum into more ventral brainstem fates causes cerebellar agenesis in the absence of Ptf1a function.","date":"2014","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/24733890","citation_count":42,"is_preprint":false},{"pmid":"23616538","id":"PMC_23616538","title":"Genome-wide expression analysis of Ptf1a- and Ascl1-deficient mice reveals new markers for distinct dorsal horn interneuron populations contributing to nociceptive reflex plasticity.","date":"2013","source":"The Journal of neuroscience : the official journal of the Society for Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/23616538","citation_count":40,"is_preprint":false},{"pmid":"19067490","id":"PMC_19067490","title":"Exdpf is a key regulator of exocrine pancreas development controlled by retinoic acid and ptf1a in zebrafish.","date":"2008","source":"PLoS biology","url":"https://pubmed.ncbi.nlm.nih.gov/19067490","citation_count":40,"is_preprint":false},{"pmid":"19741120","id":"PMC_19741120","title":"Multiple transcriptional mechanisms control Ptf1a levels during neural development including autoregulation by the PTF1-J complex.","date":"2009","source":"The Journal of neuroscience : the official journal of the Society for Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/19741120","citation_count":36,"is_preprint":false},{"pmid":"22723691","id":"PMC_22723691","title":"Tlx1/3 and Ptf1a control the expression of distinct sets of transmitter and peptide receptor genes in the developing dorsal spinal cord.","date":"2012","source":"The Journal of neuroscience : the official journal of the Society for Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/22723691","citation_count":32,"is_preprint":false},{"pmid":"26937009","id":"PMC_26937009","title":"Loss of Ptf1a Leads to a Widespread Cell-Fate Misspecification in the Brainstem, Affecting the Development of Somatosensory and Viscerosensory Nuclei.","date":"2016","source":"The Journal of neuroscience : the official journal of the Society for Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/26937009","citation_count":32,"is_preprint":false},{"pmid":"23754747","id":"PMC_23754747","title":"Program specificity for Ptf1a in pancreas versus neural tube development correlates with distinct collaborating cofactors and chromatin accessibility.","date":"2013","source":"Molecular and cellular biology","url":"https://pubmed.ncbi.nlm.nih.gov/23754747","citation_count":32,"is_preprint":false},{"pmid":"21839069","id":"PMC_21839069","title":"Ptf1a/Rbpj complex inhibits ganglion cell fate and drives the specification of all horizontal cell subtypes in the chick retina.","date":"2011","source":"Developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/21839069","citation_count":30,"is_preprint":false},{"pmid":"19650412","id":"PMC_19650412","title":"A Turkish newborn infant with cerebellar agenesis/neonatal diabetes mellitus and PTF1A mutation.","date":"2009","source":"Genetic counseling (Geneva, Switzerland)","url":"https://pubmed.ncbi.nlm.nih.gov/19650412","citation_count":27,"is_preprint":false},{"pmid":"16201968","id":"PMC_16201968","title":"Interactions between hairy/enhancer of split-related proteins and the pancreatic transcription factor Ptf1-p48 modulate function of the PTF1 transcriptional complex.","date":"2006","source":"The Biochemical journal","url":"https://pubmed.ncbi.nlm.nih.gov/16201968","citation_count":26,"is_preprint":false},{"pmid":"18006384","id":"PMC_18006384","title":"Temporal and spatial expression of transcription factors FoxN4, Ptf1a, Prox1, Isl1 and Lim1 mRNA in the developing chick retina.","date":"2007","source":"Gene expression patterns : GEP","url":"https://pubmed.ncbi.nlm.nih.gov/18006384","citation_count":26,"is_preprint":false},{"pmid":"19887377","id":"PMC_19887377","title":"Ptf1a directly controls expression of immunoglobulin superfamily molecules Nephrin and Neph3 in the developing central nervous system.","date":"2009","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/19887377","citation_count":25,"is_preprint":false},{"pmid":"25773748","id":"PMC_25773748","title":"Fate mapping of ptf1a-expressing cells during pancreatic organogenesis and regeneration in zebrafish.","date":"2015","source":"Developmental dynamics : an official publication of the American Association of Anatomists","url":"https://pubmed.ncbi.nlm.nih.gov/25773748","citation_count":21,"is_preprint":false},{"pmid":"22372950","id":"PMC_22372950","title":"Rbms3, an RNA-binding protein, mediates the expression of Ptf1a by binding to its 3'UTR during mouse pancreas development.","date":"2012","source":"DNA and cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/22372950","citation_count":21,"is_preprint":false},{"pmid":"28863786","id":"PMC_28863786","title":"Prdm13 forms a feedback loop with Ptf1a and is required for glycinergic amacrine cell genesis in the Xenopus Retina.","date":"2017","source":"Neural development","url":"https://pubmed.ncbi.nlm.nih.gov/28863786","citation_count":21,"is_preprint":false},{"pmid":"31631582","id":"PMC_31631582","title":"SOX9+/PTF1A+ Cells Define the Tip Progenitor Cells of the Human Fetal Pancreas of the Second Trimester.","date":"2019","source":"Stem cells translational medicine","url":"https://pubmed.ncbi.nlm.nih.gov/31631582","citation_count":21,"is_preprint":false},{"pmid":"28663161","id":"PMC_28663161","title":"Pancreatic Agenesis due to Compound Heterozygosity for a Novel Enhancer and Truncating Mutation in the PTF1A Gene.","date":"2017","source":"Journal of clinical research in pediatric endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/28663161","citation_count":21,"is_preprint":false},{"pmid":"29972793","id":"PMC_29972793","title":"Forebrain Ptf1a Is Required for Sexual Differentiation of the Brain.","date":"2018","source":"Cell reports","url":"https://pubmed.ncbi.nlm.nih.gov/29972793","citation_count":20,"is_preprint":false},{"pmid":"30361559","id":"PMC_30361559","title":"Ptf1a inactivation in adult pancreatic acinar cells causes apoptosis through activation of the endoplasmic reticulum stress pathway.","date":"2018","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/30361559","citation_count":19,"is_preprint":false},{"pmid":"23437000","id":"PMC_23437000","title":"Next-generation sequencing identifies the Danforth's short tail mouse mutation as a retrotransposon insertion affecting Ptf1a expression.","date":"2013","source":"PLoS genetics","url":"https://pubmed.ncbi.nlm.nih.gov/23437000","citation_count":19,"is_preprint":false},{"pmid":"29719936","id":"PMC_29719936","title":"Induced PTF1a expression in pancreatic ductal adenocarcinoma cells activates acinar gene networks, reduces tumorigenic properties, and sensitizes cells to gemcitabine treatment.","date":"2018","source":"Molecular oncology","url":"https://pubmed.ncbi.nlm.nih.gov/29719936","citation_count":18,"is_preprint":false},{"pmid":"25371369","id":"PMC_25371369","title":"Dominant and context-specific control of endodermal organ allocation by Ptf1a.","date":"2014","source":"Development (Cambridge, England)","url":"https://pubmed.ncbi.nlm.nih.gov/25371369","citation_count":17,"is_preprint":false},{"pmid":"27284104","id":"PMC_27284104","title":"Isolated Pancreatic Aplasia Due to a Hypomorphic PTF1A Mutation.","date":"2016","source":"Diabetes","url":"https://pubmed.ncbi.nlm.nih.gov/27284104","citation_count":16,"is_preprint":false},{"pmid":"28943513","id":"PMC_28943513","title":"Neonatal Diabetes: Two Cases with Isolated Pancreas Agenesis due to Homozygous PTF1A Enhancer Mutations and One with Developmental Delay, Epilepsy, and Neonatal Diabetes Syndrome due to KCNJ11 Mutation.","date":"2017","source":"Journal of clinical research in pediatric endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/28943513","citation_count":16,"is_preprint":false},{"pmid":"23436999","id":"PMC_23436999","title":"Ectopic expression of Ptf1a induces spinal defects, urogenital defects, and anorectal malformations in Danforth's short tail mice.","date":"2013","source":"PLoS genetics","url":"https://pubmed.ncbi.nlm.nih.gov/23436999","citation_count":15,"is_preprint":false},{"pmid":"33238109","id":"PMC_33238109","title":"Spinal Inhibitory Ptf1a-Derived Neurons Prevent Self-Generated Itch.","date":"2020","source":"Cell reports","url":"https://pubmed.ncbi.nlm.nih.gov/33238109","citation_count":14,"is_preprint":false},{"pmid":"26184423","id":"PMC_26184423","title":"Variable Phenotype of Diabetes Mellitus in Siblings with a Homozygous PTF1A Enhancer Mutation.","date":"2015","source":"Hormone research in paediatrics","url":"https://pubmed.ncbi.nlm.nih.gov/26184423","citation_count":14,"is_preprint":false},{"pmid":"24375815","id":"PMC_24375815","title":"Ectopic Ptf1a expression in murine ESCs potentiates endocrine differentiation and models pancreas development in vitro.","date":"2014","source":"Stem cells (Dayton, Ohio)","url":"https://pubmed.ncbi.nlm.nih.gov/24375815","citation_count":12,"is_preprint":false},{"pmid":"18834332","id":"PMC_18834332","title":"p/CAF modulates the activity of the transcription factor p48/Ptf1a involved in pancreatic acinar differentiation.","date":"2009","source":"The Biochemical journal","url":"https://pubmed.ncbi.nlm.nih.gov/18834332","citation_count":12,"is_preprint":false},{"pmid":"24643195","id":"PMC_24643195","title":"Ascl1 as a novel player in the Ptf1a transcriptional network for GABAergic cell specification in the retina.","date":"2014","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/24643195","citation_count":12,"is_preprint":false},{"pmid":"20830706","id":"PMC_20830706","title":"Id3 modulates cellular localization of bHLH Ptf1-p48 protein.","date":"2010","source":"International journal of cancer","url":"https://pubmed.ncbi.nlm.nih.gov/20830706","citation_count":11,"is_preprint":false},{"pmid":"28475592","id":"PMC_28475592","title":"LSL-KrasG12D; LSL-Trp53R172H/+; Ink4flox/+; Ptf1/p48-Cre mice are an applicable model for locally invasive and metastatic pancreatic cancer.","date":"2017","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/28475592","citation_count":11,"is_preprint":false},{"pmid":"23876428","id":"PMC_23876428","title":"Distinct enhancers of ptf1a mediate specification and expansion of ventral pancreas in zebrafish.","date":"2013","source":"Developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/23876428","citation_count":11,"is_preprint":false},{"pmid":"32928905","id":"PMC_32928905","title":"Gsx2 is required for specification of neurons in the inferior olivary nuclei from Ptf1a-expressing neural progenitors in zebrafish.","date":"2020","source":"Development (Cambridge, England)","url":"https://pubmed.ncbi.nlm.nih.gov/32928905","citation_count":11,"is_preprint":false},{"pmid":"37055006","id":"PMC_37055006","title":"Ptf1a expression is necessary for correct targeting of spiral ganglion neurons within the cochlear nuclei.","date":"2023","source":"Neuroscience letters","url":"https://pubmed.ncbi.nlm.nih.gov/37055006","citation_count":10,"is_preprint":false},{"pmid":"32241803","id":"PMC_32241803","title":"Positive autofeedback regulation of Ptf1a transcription generates the levels of PTF1A required to generate itch circuit neurons.","date":"2020","source":"Genes & development","url":"https://pubmed.ncbi.nlm.nih.gov/32241803","citation_count":10,"is_preprint":false},{"pmid":"32893856","id":"PMC_32893856","title":"Clinical Characteristics and Long-term Follow-up of Patients with Diabetes Due To PTF1A Enhancer Mutations.","date":"2020","source":"The Journal of clinical endocrinology and metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/32893856","citation_count":10,"is_preprint":false},{"pmid":"22265691","id":"PMC_22265691","title":"MiR-18a regulates expression of the pancreatic transcription factor Ptf1a in pancreatic progenitor and acinar cells.","date":"2012","source":"FEBS letters","url":"https://pubmed.ncbi.nlm.nih.gov/22265691","citation_count":10,"is_preprint":false},{"pmid":"34581719","id":"PMC_34581719","title":"Engineering of a functional pancreatic acinus with reprogrammed cancer cells by induced PTF1a expression.","date":"2021","source":"Lab on a chip","url":"https://pubmed.ncbi.nlm.nih.gov/34581719","citation_count":9,"is_preprint":false},{"pmid":"28138096","id":"PMC_28138096","title":"ptf1a , ela3l cells are developmentally maintained progenitors for exocrine regeneration following extreme loss of acinar cells in zebrafish larvae.","date":"2017","source":"Disease models & mechanisms","url":"https://pubmed.ncbi.nlm.nih.gov/28138096","citation_count":9,"is_preprint":false},{"pmid":"25878276","id":"PMC_25878276","title":"Misexpression of ptf1a in cortical pyramidal cells in vivo promotes an inhibitory peptidergic identity.","date":"2015","source":"The Journal of neuroscience : the official journal of the Society for Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/25878276","citation_count":7,"is_preprint":false},{"pmid":"29624227","id":"PMC_29624227","title":"Conventional insulin pump therapy in two neonatal diabetes patients harboring the homozygous PTF1A enhancer mutation: Need for a novel approach for the management of neonatal diabetes.","date":"2017","source":"The Turkish journal of pediatrics","url":"https://pubmed.ncbi.nlm.nih.gov/29624227","citation_count":7,"is_preprint":false},{"pmid":"23339455","id":"PMC_23339455","title":"ICAT is a novel Ptf1a interactor that regulates pancreatic acinar differentiation and displays altered expression in tumours.","date":"2013","source":"The Biochemical journal","url":"https://pubmed.ncbi.nlm.nih.gov/23339455","citation_count":6,"is_preprint":false},{"pmid":"27350561","id":"PMC_27350561","title":"Regulating the dorsal neural tube expression of Ptf1a through a distal 3' enhancer.","date":"2016","source":"Developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/27350561","citation_count":6,"is_preprint":false},{"pmid":"38456494","id":"PMC_38456494","title":"Foxp and Skor family proteins control differentiation of Purkinje cells from Ptf1a- and Neurog1-expressing progenitors in zebrafish.","date":"2024","source":"Development (Cambridge, England)","url":"https://pubmed.ncbi.nlm.nih.gov/38456494","citation_count":5,"is_preprint":false},{"pmid":"28571517","id":"PMC_28571517","title":"Mechanistic insights into the activity of Ptf1-p48 (pancreas transcription factor 1a): probing the interactions levels of Ptf1-p48 with E2A-E47 (transcription factor E2-alpha) and ID3 (inhibitor of DNA binding 3).","date":"2017","source":"Journal of biomolecular structure & dynamics","url":"https://pubmed.ncbi.nlm.nih.gov/28571517","citation_count":3,"is_preprint":false},{"pmid":"25775927","id":"PMC_25775927","title":"Mutations in PTF1A are not a common cause for human VATER/VACTERL association or neural tube defects mirroring Danforth's short tail mouse.","date":"2015","source":"Molecular medicine reports","url":"https://pubmed.ncbi.nlm.nih.gov/25775927","citation_count":3,"is_preprint":false},{"pmid":"37854477","id":"PMC_37854477","title":"Isolated Pancreatic Agenesis Secondary to PTF1A Gene Mutation: A Case Series and Literature Review.","date":"2023","source":"Cureus","url":"https://pubmed.ncbi.nlm.nih.gov/37854477","citation_count":2,"is_preprint":false},{"pmid":"39537822","id":"PMC_39537822","title":"Multiscale 3D genome rewiring during PTF1A-mediated somatic cell reprogramming into neural stem cells.","date":"2024","source":"Communications biology","url":"https://pubmed.ncbi.nlm.nih.gov/39537822","citation_count":2,"is_preprint":false},{"pmid":"35195600","id":"PMC_35195600","title":"Ptf1a Promoter-Driven Cre Expression During Spermatogenesis Causes Germline Recombination.","date":"2022","source":"Pancreas","url":"https://pubmed.ncbi.nlm.nih.gov/35195600","citation_count":1,"is_preprint":false},{"pmid":"37519669","id":"PMC_37519669","title":"Expression and clinicopathological characteristics of PDX1, PTF1A, and SALL4 in large and small ducts of ectopic pancreas located in gastro-duodenum and jejunum.","date":"2023","source":"Heliyon","url":"https://pubmed.ncbi.nlm.nih.gov/37519669","citation_count":1,"is_preprint":false},{"pmid":"27066080","id":"PMC_27066080","title":"PTF1a Activity in Enriched Posterior Foregut Endoderm, but Not Definitive Endoderm, Leads to Enhanced Pancreatic Differentiation in an In Vitro Mouse ESC-Based Model.","date":"2016","source":"Stem cells international","url":"https://pubmed.ncbi.nlm.nih.gov/27066080","citation_count":1,"is_preprint":false},{"pmid":"40443916","id":"PMC_40443916","title":"A Rare PTF1A Enhancer Mutation Causing Neonatal Diabetes Mellitus with Pancreatic Agenesis: Case Report and Considerations for Genetic Evaluation.","date":"2025","source":"International journal of endocrinology and metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/40443916","citation_count":0,"is_preprint":false},{"pmid":"41536248","id":"PMC_41536248","title":"Compound Heterozygosity of PTF1A Exonic and Enhancer Variants in a Japanese Boy With Pancreatic Hypoplasia.","date":"2026","source":"Clinical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/41536248","citation_count":0,"is_preprint":false},{"pmid":null,"id":"bio_10.1101_2025.11.26.690783","title":"Dietary Fat Content Influences PanIN Progression and Pancreatic Cancer Development in Mice","date":"2025-12-01","source":"bioRxiv","url":"https://doi.org/10.1101/2025.11.26.690783","citation_count":0,"is_preprint":true},{"pmid":null,"id":"bio_10.1101_2025.07.07.663183","title":"Modeling Laryngeal Dystonia through Spectral Analyses of Vocalizations in a Dystonia Mouse Model","date":"2025-07-10","source":"bioRxiv","url":"https://doi.org/10.1101/2025.07.07.663183","citation_count":0,"is_preprint":true},{"pmid":null,"id":"bio_10.1101_2024.12.30.630679","title":"Sex-specific survival but not tissue wasting in the KPP mouse model of pancreatic cancer-induced cachexia","date":"2024-12-31","source":"bioRxiv","url":"https://doi.org/10.1101/2024.12.30.630679","citation_count":0,"is_preprint":true},{"pmid":null,"id":"bio_10.1101_2025.05.28.656689","title":"Molecular dynamics driving phenotypic divergence among KRAS mutants in pancreatic tumorigenesis","date":"2025-06-01","source":"bioRxiv","url":"https://doi.org/10.1101/2025.05.28.656689","citation_count":0,"is_preprint":true},{"pmid":null,"id":"bio_10.1101_2024.07.12.603289","title":"Functional analysis of conserved  <i>C. elegans</i>  bHLH family members uncovers lifespan control by a peptidergic hub neuron","date":"2024-07-16","source":"bioRxiv","url":"https://doi.org/10.1101/2024.07.12.603289","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":47748,"output_tokens":9588,"usd":0.143532,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":19944,"output_tokens":6110,"usd":0.126235,"stage2_stop_reason":"end_turn"},"total_usd":0.269767,"stage1_batch_id":"msgbatch_01CNoDbkChHEkgrJnL7BwtGJ","stage2_batch_id":"msgbatch_016Y4x9E9Wg5VQDANj9quSQD","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1998,\n      \"finding\": \"PTF1A (p48) is the cell-specific DNA-binding subunit of the hetero-oligomeric PTF1 transcription factor complex that directs expression of exocrine pancreatic genes; null mutation in mice abolishes exocrine pancreatic tissue, establishing PTF1A as required for exocrine cell lineage differentiation and/or proliferation.\",\n      \"method\": \"Gene knockout (null allele generation in mice), histological and molecular analysis of pancreatic tissue\",\n      \"journal\": \"Genes & development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean KO with defined cellular phenotype, replicated across multiple subsequent studies\",\n      \"pmids\": [\"9851981\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"PTF1A is expressed in multipotent pancreatic progenitors (progenitors of ducts, exocrine, and endocrine cells) at early stages of pancreas development; inactivation of Ptf1a causes pancreatic progenitors to adopt duodenal epithelial fates, establishing PTF1A as required for specification of pancreatic fate from undifferentiated foregut endoderm.\",\n      \"method\": \"Cre-mediated lineage tracing in vivo, Ptf1a null mouse analysis, transgene-based Pdx1 rescue experiments\",\n      \"journal\": \"Nature genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal genetic experiments (lineage tracing + KO + rescue), replicated across labs\",\n      \"pmids\": [\"12185368\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"Human PTF1A truncating mutations (705insG and C886T) cause pancreatic and cerebellar agenesis; reporter-gene studies with deletion mutants defined a C-terminal domain (beyond the bHLH domain) as crucial for PTF1A function.\",\n      \"method\": \"Positional cloning, reporter-gene transactivation assays with PTF1A deletion mutants, neuropathological analysis of Ptf1a-/- mice\",\n      \"journal\": \"Nature genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — functional domain mapping by mutagenesis combined with human genetics and mouse KO validation\",\n      \"pmids\": [\"15543146\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"Aortal endothelial cells specifically induce PTF1A expression in dorsal pancreatic endoderm to initiate dorsal pancreatic bud formation; tissue recombination experiments using Flk1-/- embryos lacking endothelial cells demonstrated this induction.\",\n      \"method\": \"Tissue recombination experiments, Flk1-/- mouse embryos lacking endothelial cells, in situ hybridization\",\n      \"journal\": \"Development (Cambridge, England)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — tissue recombination with genetic loss-of-function, two orthogonal approaches in one study\",\n      \"pmids\": [\"14736742\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"PTF1A is required in cerebellar ventricular zone progenitors to specify GABAergic neuronal fate; loss of Ptf1a (cerebelless mutant) causes failure of GABAergic neuron production; ectopic expression in glutamatergic neuron precursors in dorsal telencephalon converts them to GABAergic neurons with representative morphological and migratory features.\",\n      \"method\": \"Cerebelless mutant characterization, Cre-mediated lineage tracing, ectopic Ptf1a expression by electroporation\",\n      \"journal\": \"Neuron\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — loss-of-function with defined phenotype plus gain-of-function cell fate conversion, replicated across subsequent studies\",\n      \"pmids\": [\"16039563\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"PTF1A is required in dorsal spinal cord progenitors for generation of GABAergic interneurons (dI4 and dILA populations marked by Lhx1/5 and Pax2); in Ptf1a null mice, dI4 neurons trans-fate to dI5 (Lmx1b+) and dILA to dILB (Lmx1b+;Tlx3+), establishing PTF1A as a determinant of GABAergic over glutamatergic neuronal fate.\",\n      \"method\": \"Ptf1a null mouse analysis, immunohistochemistry for interneuron markers, in situ hybridization\",\n      \"journal\": \"Development (Cambridge, England)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean KO with defined cell-fate switch phenotype, replicated across labs\",\n      \"pmids\": [\"16291784\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"PTF1A forms an active trimeric PTF1 complex with an E-protein (class I bHLH) and either RBPJ or RBPJL; HES family members (Hes1, Hey1, Hey2) directly interact with Ptf1a-p48 through co-immunoprecipitation and GST pulldown, inhibiting PTF1 transcriptional complex activity; the HES-Ptf1a interaction domain was mapped to the bHLH, Orange, and C-terminal domains of Hes1.\",\n      \"method\": \"Co-immunoprecipitation, yeast two-hybrid, GST pulldown assay, reporter gene transactivation assays\",\n      \"journal\": \"The Biochemical journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — multiple orthogonal binding assays (Co-IP, Y2H, GST pulldown) plus functional reporter assay, single lab\",\n      \"pmids\": [\"16201968\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"Ptf1a is expressed by post-mitotic retinal precursors and marks progenitors competent to exclusively produce horizontal and amacrine neurons; inactivation of Ptf1a causes fate-switch of these precursors to ganglion cell fate, resulting in complete loss of horizontal cells and decrease in amacrine cells; Ptf1a is a primary downstream target of the Foxn4 forkhead transcription factor.\",\n      \"method\": \"Cre-based lineage tracing, Ptf1a null mouse analysis, immunohistochemistry\",\n      \"journal\": \"Development (Cambridge, England)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — lineage tracing plus KO with defined phenotype, confirmed by independent study (PMID 17301087)\",\n      \"pmids\": [\"17075007\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"PTF1A occupies the conserved PTF1-binding site within area III of the Pdx1 promoter in E11.5 pancreatic buds; PTF1 specifically trans-activates area III-containing reporter expression, and the PTF1 site contributes to area III-dependent reporter gene expression in acinar AR42J cells.\",\n      \"method\": \"Chromatin immunoprecipitation (ChIP) from E11.5 pancreatic buds, reporter gene assays in cell lines, in vivo transgenic reporter analysis\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — ChIP from embryonic tissue plus functional reporter assays, two orthogonal methods\",\n      \"pmids\": [\"17403901\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"PTF1A is required for differentiation of GABAergic and glycinergic amacrine cells and horizontal cells in mouse retina; Ptf1a-null retinas completely lack GABAergic and glycinergic amacrine cells and horizontal cells, with partial trans-differentiation of Ptf1a-expressing precursors to ganglion cells.\",\n      \"method\": \"Ptf1a conditional knockout in retina, lineage tracing, immunohistochemistry for cell-type-specific markers\",\n      \"journal\": \"Development (Cambridge, England)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — KO with defined cellular phenotype replicated across multiple studies\",\n      \"pmids\": [\"17301087\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"PTF1A is required for climbing fiber neuron development; Ptf1a-expressing progenitors in the dorsolateral caudal hindbrain generate climbing fiber neurons of the inferior olivary nucleus; in Ptf1a null mutants, putative CF neurons fail to migrate/differentiate, ION formation fails, and some cells fate-switch to mossy fiber neurons.\",\n      \"method\": \"Ptf1a-lacZ knock-in fate mapping, Ptf1a null mouse analysis, retrograde labeling, immunohistochemistry\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic fate mapping plus KO phenotype, multiple orthogonal methods in one study\",\n      \"pmids\": [\"17928434\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"PTF1A establishes a transcriptional autoregulatory loop via the trimeric PTF1 complex (PTF1A + E protein + RBPJ or RBPJL) binding to two conserved sites in the Ptf1a autoregulatory enhancer; the PTF1 complex also forms dual autoregulatory loops with the Rbpjl gene to maintain stable acinar cell phenotype.\",\n      \"method\": \"Transgenic reporter assays in mice, EMSA/binding site mutagenesis, ChIP from pancreatic tissue, cell line transfection\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — ChIP from tissue, transgenic reporter with site mutagenesis, and cell transfection, multiple orthogonal methods\",\n      \"pmids\": [\"18606784\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"PTF1A acts as a master regulator of glycinergic, peptidergic, and GABAergic transmitter phenotypes in dorsal spinal cord inhibitory neurons; Pax2 is a downstream target of Ptf1a; Ptf1a is required for expression of GlyT2, NPY, N/OFQ, SOM, ENK, DYN, and GAL.\",\n      \"method\": \"Ptf1a null mouse analysis, in situ hybridization, immunohistochemistry\",\n      \"journal\": \"Developmental biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean KO with multiple defined molecular readouts\",\n      \"pmids\": [\"18634777\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Nkx6.1/Nkx6.2 and PTF1A function as cross-repressive lineage determinants in multipotent pancreatic progenitors; PTF1A is required and sufficient to repress the endocrine lineage program and specify progenitors toward acinar fate, operating only during a critical competence window.\",\n      \"method\": \"Genetic loss-of-function and gain-of-function mouse models, lineage tracing\",\n      \"journal\": \"Developmental cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal gain- and loss-of-function epistasis experiments, multiple labs replicated cross-repression concept\",\n      \"pmids\": [\"20627083\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"The PTF1-J trimeric complex (PTF1A + E protein + RBPJ) directly regulates Neurog2 expression in the dorsal neural tube through a 3' enhancer containing a required PTF1-J binding site; Ptf1a occupies the Neurog2 enhancer in vivo (ChIP from neural tube tissue), and Neurog2 is the first identified neural target of PTF1A.\",\n      \"method\": \"ChIP from neural tube tissue, gain/loss of Ptf1a function in vivo (chick and mouse), reporter assays with site mutagenesis\",\n      \"journal\": \"Development (Cambridge, England)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — ChIP from tissue, in vivo reporter with mutagenesis, and genetic gain/loss-of-function, multiple orthogonal methods\",\n      \"pmids\": [\"19641016\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"PTF1A directly binds to PTF-binding motifs in the 5'-flanking regions of Nephrin and Neph3 genes and activates their transcription; expression of Nephrin and Neph3 is lost in Ptf1a-null mice and induced by forced PTF1A expression, establishing them as direct downstream targets in neural development.\",\n      \"method\": \"ChIP (direct binding to endogenous loci), reporter gene activation assays, Ptf1a null mouse analysis, gain-of-function\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — ChIP plus reporter assays plus KO and OE validation, multiple orthogonal methods, single lab\",\n      \"pmids\": [\"19887377\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"PTF1A-mediated autoregulation in the nervous system requires PTF1-J complex binding to a conserved 5' 2.3 kb autoregulatory element; a separate Ptf1a-independent 12.4 kb 3' regulatory region initiates Ptf1a expression independently of PTF1A, establishing two distinct transcriptional mechanisms controlling Ptf1a levels.\",\n      \"method\": \"Transgenic reporter assays in mice, in vitro binding assays (PTF1-J complex), Ptf1a null mouse analysis\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — transgenic reporter with in vitro binding and null mouse validation, multiple methods\",\n      \"pmids\": [\"19741120\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"The histone acetyltransferase p/CAF interacts with PTF1A (p48) in acinar cells in vivo, is associated with PTF1 target gene promoters, and acetylates PTF1A at Lys200; the K200R mutation abolishes PTF1A transcriptional activity and cooperation with RBP-L, establishing that p/CAF-mediated acetylation is required for full PTF1 transcriptional activity.\",\n      \"method\": \"Co-immunoprecipitation from acinar cells, ChIP at PTF1 target promoters, site-directed mutagenesis (K200R), reporter gene assays\",\n      \"journal\": \"The Biochemical journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — Co-IP in vivo, ChIP, and functional mutagenesis with multiple orthogonal methods in one study\",\n      \"pmids\": [\"18834332\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Id3 directly interacts with PTF1A (p48) and E47, disrupting E47/PTF1A interaction; gastrin-induced increases in Id3 expression cause cytoplasmic mislocalization of PTF1A in acinar cells; Id3 silencing reverses the gastrin-induced cytoplasmic mislocalization, establishing E47-dependent nuclear import as the mechanism governing PTF1A nuclear localization.\",\n      \"method\": \"Co-immunoprecipitation, Id3 siRNA knockdown, subcellular localization imaging in AR4-2J acinar cells\",\n      \"journal\": \"International journal of cancer\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 / Moderate — Co-IP plus knockdown with localization readout, single lab, two orthogonal methods\",\n      \"pmids\": [\"20830706\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"PTF1A activates Dll1 expression in multipotent pancreatic progenitor cells, which maintains Hes1 expression and in turn sustains Ptf1a protein levels, forming a Ptf1a-Dll1-Hes1-Ptf1a feedback circuit that promotes MPC proliferation and pancreatic growth; this represents an alternative to classical lateral inhibition.\",\n      \"method\": \"Genetic mouse mutants (Dll1, Hes1, Ptf1a), epistasis analysis, Neurog3 conditional deletion, BrdU proliferation assay\",\n      \"journal\": \"Development (Cambridge, England)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple genetic epistasis combinations with quantitative phenotypic readouts\",\n      \"pmids\": [\"22096075\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"In zebrafish, postembryonic antagonism of Ptf1a induces expression of endocrine genes including insulin in exocrine compartment; lineage tracing demonstrates induced insulin+ cells derive from acinar cells, establishing that continuous PTF1A activity is required to maintain acinar cell identity and suppress endocrine fate.\",\n      \"method\": \"Genetic lineage tracing, postembryonic Ptf1a antagonism, immunohistochemistry\",\n      \"journal\": \"Current biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — lineage tracing plus loss-of-function with defined molecular readout, single lab\",\n      \"pmids\": [\"21497092\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"PTF1A directly regulates Mnx1 (via a distant enhancer), Pdx1, Nkx6.1, and Onecut1 in pancreatic progenitors; ChIP-seq identified PTF1A-bound genomic regions near genes required for pancreas bud maintenance, establishing PTF1A as a direct upstream activator of a transcription factor network for pancreatic progenitor maintenance.\",\n      \"method\": \"RNA profiling, ChIP-sequencing from pancreatic progenitors, reporter gene assays\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — genome-wide ChIP-seq plus functional reporter validation, single lab\",\n      \"pmids\": [\"22232429\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"Rbms3 RNA-binding protein binds to the 3'UTR of Ptf1a mRNA (but not Pdx1 3'UTR) and stimulates Ptf1a translation; knockdown of Rbms3 in AR42J-B13 cells reduces PTF1A expression, establishing post-transcriptional regulation of PTF1A by Rbms3.\",\n      \"method\": \"RNA pull-down/binding assay, ectopic expression of reporter with Ptf1a 3'UTR, siRNA knockdown in pancreatic cell line\",\n      \"journal\": \"DNA and cell biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — RNA binding assay plus reporter plus knockdown, single lab, multiple methods\",\n      \"pmids\": [\"22372950\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Prdm13 is a direct transcriptional target of the PTF1A-RBPJ complex in the dorsal neural tube; Prdm13 suppresses glutamatergic (Tlx3+) and promotes GABAergic (Pax2+) neuronal fate by blocking Neurog2-mediated Tlx3 activation; Prdm13 also exerts negative autoregulation.\",\n      \"method\": \"Ptf1a gain/loss-of-function in Xenopus and mice, morpholino knockdown, chick neural tube electroporation, RBPJ complex requirement tested\",\n      \"journal\": \"Developmental biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — gain and loss of function in two vertebrate models with defined molecular targets, multiple orthogonal methods\",\n      \"pmids\": [\"24370451\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Most PTF1A-bound genomic regions are tissue-specific (pancreas vs. neural tube) and coincide with open chromatin regions; Foxa2 colocalizes with PTF1A in embryonic pancreatic chromatin and acts synergistically with PTF1A in cell transfection assays, establishing lineage-specific chromatin landscape as a constraint on PTF1A binding specificity.\",\n      \"method\": \"In vivo ChIP-seq from developing pancreas and neural tube, transgenic reporter assays, co-transfection synergy assays, ATAC-seq equivalent open chromatin analysis\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — genome-wide ChIP-seq in two tissues plus transgenic reporter validation plus functional synergy assays\",\n      \"pmids\": [\"23754747\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"ICAT (inhibitor of β-catenin and Tcf4) is a novel PTF1A interactor identified by yeast two-hybrid; ICAT overexpression negatively regulates PTF1 activity by direct binding to PTF1A, displacing p/CAF, reducing PTF1A-RBPJl interaction, and impairing PTF1A acetylation, independently of β-catenin.\",\n      \"method\": \"Yeast two-hybrid screen, in vitro and in vivo co-immunoprecipitation, reporter gene assays, co-immunoprecipitation mapping of interaction\",\n      \"journal\": \"The Biochemical journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — Y2H discovery validated by reciprocal Co-IP and functional reporter assay with mechanistic dissection, single lab\",\n      \"pmids\": [\"23339455\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"A retrotransposon (ETn) insertion 12.5 kb upstream of Ptf1a significantly upregulates Ptf1a expression in Danforth's short tail (Sd) mutant embryos at E9.5, and ectopic PTF1A misexpression in the notochord, hindgut, cloaca, and mesonephros causes the Sd phenotype via attenuation of Cdx2 and downstream targets T, Wnt3a, and Cyp26a1.\",\n      \"method\": \"Next-generation sequencing, Sanger sequencing, knockout and knock-in mouse models, in situ hybridization\",\n      \"journal\": \"PLoS genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — positional cloning confirmed by multiple KO/KI models and molecular pathway analysis, two concurrent studies\",\n      \"pmids\": [\"23437000\", \"23436999\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"PTF1A enhancer mutations in a ~400-bp sequence 25 kb downstream of PTF1A abolish enhancer activity in reporter gene assays; these mutations are the most common cause of isolated pancreatic agenesis.\",\n      \"method\": \"Whole-genome sequencing, epigenomic annotation in hESC-derived pancreatic progenitors, reporter gene/enhancer activity assays\",\n      \"journal\": \"Nature genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — functional reporter validation of enhancer activity plus genetic identification in multiple families\",\n      \"pmids\": [\"24212882\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"In Ptf1a null mice, cerebellar ventricular zone cells initiate more ventral brainstem expression programs (including Lmx1b and Tlx3), exit the cerebellar anlage, and contribute to adjacent brainstem or die, establishing PTF1A as required to segregate cerebellar from ventral brainstem fates.\",\n      \"method\": \"Genetic fate mapping in Ptf1a-/- mice, birthdating, gene expression analysis (immunohistochemistry, in situ hybridization)\",\n      \"journal\": \"Proceedings of the National Academy of Sciences\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic fate mapping plus gene expression analysis, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"24733890\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Ectopic expression of Ptf1a in glutamatergic neuron precursors in the cerebellar rhombic lip converts them to produce GABAergic populations (Purkinje cells and GABAergic interneurons); Ptf1a and Atoh1 mutually negatively regulate each other's expression, establishing PTF1A as both necessary and sufficient for GABAergic specification in cerebellar neuroepithelium.\",\n      \"method\": \"Knock-in mouse lines (Ptf1a-Atoh1 and Atoh1-Ptf1a), in utero electroporation, BrdU birthdating\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal knock-in genetics plus electroporation, two orthogonal methods establishing sufficiency and mutual repression\",\n      \"pmids\": [\"24695699\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"PTF1A expression is lost in mouse and human pancreatic intraepithelial neoplasia (PanIN); PTF1A loss alone is sufficient to induce acinar-to-ductal metaplasia and a KRAS-permissive gene expression profile; Ptf1a-deficient acinar cells are dramatically sensitized to KRAS transformation, establishing PTF1A as a tumor suppressor in pancreas.\",\n      \"method\": \"Conditional Ptf1a knockout in mice, histological analysis, gene expression profiling (RNA-seq), KRAS combination mouse models\",\n      \"journal\": \"eLife\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — conditional KO with defined phenotype, genetic epistasis with KRAS, transcriptomics, and human tissue validation\",\n      \"pmids\": [\"26151762\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Tfap2a and Tfap2b are major downstream effectors of PTF1A in retinal amacrine cell differentiation; their expression is dramatically downregulated in Ptf1a null retina; overexpression promotes glycinergic and GABAergic amacrine cell differentiation, while simultaneous knockdown has opposite effects, establishing a Foxn4/RORβ1-Ptf1a-Tfap2a/2b regulatory cascade.\",\n      \"method\": \"RNA-seq, immunolabeling in Ptf1a null retina, overexpression and knockdown experiments in mouse retinas\",\n      \"journal\": \"Molecular brain\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — KO transcriptomics plus gain and loss of function of downstream targets, multiple methods\",\n      \"pmids\": [\"25966682\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"PTF1a-Rbpj/Ptf1a complex drives Dll1 expression in multipotent pancreatic progenitors via direct Ptf1a-mediated transcriptional control; Hes1 is required to sustain Ptf1a expression levels in early MPCs.\",\n      \"method\": \"Already captured in PMID 22096075; see above\",\n      \"journal\": \"Development (Cambridge, England)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — single lab finding from the Ptf1a-Dll1 circuit paper; already captured in 2011 entry\",\n      \"pmids\": [\"22096075\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"PTF1A directly maintains expression of genes for secretory digestive enzyme production, UPR surveillance, and a ten-member transcription factor network in adult acinar cells; PTF1A depletion causes UPR imbalance, cellular injury, acinar metaplasia, and derepression of stomach-characteristic genes, establishing PTF1A as a direct transcriptional maintainer of acinar cell identity.\",\n      \"method\": \"RNA-seq and ChIP-seq from adult pancreas after Ptf1a conditional depletion in vivo\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — genome-wide ChIP-seq plus transcriptomics in conditional KO, multiple orthogonal methods\",\n      \"pmids\": [\"27697859\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"A highly conserved distal 3' enhancer (10.8 kb downstream of Ptf1a) drives expression in dorsal neural tube progenitors; Paired homeodomain binding motifs are required for activator function and zinc finger motifs for repressor function; PAX6 and SOX3 can increase enhancer activity in reporter assays.\",\n      \"method\": \"Transgenic reporter assays in chick and mouse, site-directed mutagenesis of binding motifs, transfection reporter assays\",\n      \"journal\": \"Developmental biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — transgenic reporter with mutagenesis, single lab, two orthogonal methods\",\n      \"pmids\": [\"27350561\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"PTF1A alone is sufficient to directly reprogram mouse and human fibroblasts into self-renewable induced neural stem cells; this reprogramming depends on PTF1A's Notch-independent interaction with Rbpj, which leads to activation of TF genes and Notch signaling required for NSC specification and self-renewal.\",\n      \"method\": \"Direct reprogramming of fibroblasts, Co-IP for PTF1A-Rbpj interaction, transcriptome analysis, transplantation into AD mouse models\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reprogramming in two species, Co-IP for mechanism, functional transplantation readout\",\n      \"pmids\": [\"30030434\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Homozygous deletion of Ptf1a in adult acinar cells causes severe apoptosis mediated through endoplasmic reticulum stress via the ATF6 and PERK (but not IRE1) UPR pathways, with CHOP upregulation as the pro-apoptotic signal.\",\n      \"method\": \"Elastase-CreERTM; Ptf1a-floxed/floxed conditional KO, electron microscopy, western blot for UPR pathway components\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — conditional homozygous KO with EM and molecular pathway dissection, single lab\",\n      \"pmids\": [\"30361559\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Ptf1a is expressed in neuroepithelial cells and immature neurons around the third ventricle giving rise to hypothalamic neurons; conditional Ptf1a deficiency causes abnormal sex-biased behaviors, and Kiss1 expression is drastically reduced in the cKO hypothalamus, establishing PTF1A as a regulator of hypothalamic sexual differentiation.\",\n      \"method\": \"Conditional Ptf1a knockout, behavioral testing, gonadal hormone administration to gonadectomized mice, gene expression analysis\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — conditional KO with defined behavioral and molecular phenotype, single lab\",\n      \"pmids\": [\"29972793\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Positive transcriptional autoregulatory feedback through the PTF1A autoregulatory enhancer is required to attain PTF1A levels necessary for specifying Pdyn+ and Gal+ inhibitory dorsal spinal cord interneurons; mutations in the autoregulatory enhancer reduce PTF1A levels and cause a severe itch phenotype with increased sensitivity to itch but unaffected acute pain sensitivity.\",\n      \"method\": \"Targeted mutations in Ptf1a cis-regulatory elements in mice, quantitative analysis of neuronal populations, behavioral testing (itch, mechanical, thermal pain)\",\n      \"journal\": \"Genes & development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — precise cis-regulatory mutagenesis with quantitative neuronal and behavioral phenotypes, mechanistically informative\",\n      \"pmids\": [\"32241803\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"A spinal subpopulation of Ptf1a-derived inhibitory neurons gates mechanosensory information self-generated during movement; these neurons receive tactile and motor input and establish presynaptic inhibitory contacts on mechanosensory afferents; loss of Ptf1a neurons leads to increased hairy skin sensitivity and chronic itch partially mediated by GRPR spinal neurons.\",\n      \"method\": \"Conditional Ptf1a neuron ablation/inactivation, anatomical tracing, chemogenetic activation (DREADD), behavioral testing\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic ablation plus chemogenetics with defined circuit and behavioral phenotypes, single lab\",\n      \"pmids\": [\"33238109\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"During PTF1A-mediated fibroblast-to-NSC transdifferentiation, PTF1A binds to subTAD boundaries associated with elevated CTCF binding and enhanced boundary insulation, reorganizes chromatin loops, activates enhancers and super-enhancers near low-insulation boundaries, and modulates H3K27ac deposition to drive gene expression changes.\",\n      \"method\": \"Hi-C, ChIP-seq (PTF1A, CTCF, H3K27ac), RNA-seq multiomics integration\",\n      \"journal\": \"Communications biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — genome-wide multiomics with multiple data types, single lab, no functional mutagenesis validation of specific boundaries\",\n      \"pmids\": [\"39537822\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"PTF1A is a lineage-determining bHLH transcription factor that functions as the DNA-binding subunit of the trimeric PTF1 complex (PTF1A + E-protein + RBPJ or RBPJL); it directly activates target genes (including Pdx1, Mnx1, Neurog2, Nephrin, Neph3, Dll1, and exocrine enzyme genes), establishes transcriptional autoregulatory feedback loops, and requires p/CAF-mediated acetylation at Lys200 for full activity, while being inhibited by HES/Hey proteins and Id3 through direct protein–protein interactions; in the pancreas PTF1A specifies multipotent progenitors and then maintains acinar cell identity (preventing acinar-to-ductal metaplasia and KRAS-driven tumorigenesis), and in the nervous system it functions as a broad determinant of GABAergic/inhibitory over glutamatergic/excitatory neuronal fate in the cerebellum, spinal cord, retina, brainstem, and hypothalamus.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"PTF1A (p48) is a lineage-determining basic helix-loop-helix transcription factor that functions as the cell-specific DNA-binding subunit of the trimeric PTF1 complex, which it forms with a class I E-protein and either RBPJ or RBPJL [#0, #6]. Through this complex it directs two distinct developmental programs: specification and maintenance of pancreatic exocrine (acinar) identity, and specification of GABAergic/inhibitory over glutamatergic/excitatory neuronal fate across the cerebellum, spinal cord, retina, brainstem, and hypothalamus [#4, #5, #28]. In the pancreas, PTF1A is induced in foregut endoderm by aortic endothelial signals and is required to specify pancreatic fate from undifferentiated progenitors, which otherwise adopt duodenal fates [#1, #3]; it then acts as a cross-repressive determinant that drives acinar over endocrine programs and, in the adult, directly maintains digestive-enzyme, UPR-surveillance, and acinar transcription-factor network genes [#13, #33]. Loss of PTF1A in adult acinar cells triggers ER-stress apoptosis, acinar-to-ductal metaplasia, and a KRAS-permissive state, establishing it as a pancreatic tumor suppressor [#30, #36]. PTF1A binds direct genomic targets including Pdx1, Mnx1, Nkx6.1, Onecut1, Dll1, Neurog2, Prdm13, Nephrin and Neph3, and sustains its own expression through PTF1-complex autoregulatory enhancers that set the protein levels needed for correct cell-fate output [#8, #21, #19, #14, #23, #15, #11, #38]. Its binding specificity is constrained by tissue-specific open chromatin and cooperating factors such as Foxa2 [#24]. PTF1A activity requires p/CAF-mediated acetylation at Lys200 and is antagonized by HES/Hey proteins, Id3, and ICAT through direct protein interactions, with Id3 controlling E47-dependent nuclear localization [#17, #6, #18, #25]. Human truncating mutations and enhancer mutations cause pancreatic and cerebellar agenesis or isolated pancreatic agenesis [#2, #27].\",\n  \"teleology\": [\n    {\n      \"year\": 1998,\n      \"claim\": \"Established that PTF1A is an essential cell-type-specific transcription factor for the exocrine pancreatic lineage, defining its core developmental requirement.\",\n      \"evidence\": \"Null allele knockout in mice with histological analysis of pancreatic tissue\",\n      \"pmids\": [\"9851981\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not resolve whether the defect was specification, differentiation, or proliferation\", \"No direct target genes identified at this stage\"]\n    },\n    {\n      \"year\": 2002,\n      \"claim\": \"Showed PTF1A acts upstream in multipotent progenitors to specify pancreatic versus duodenal fate, broadening its role beyond exocrine differentiation.\",\n      \"evidence\": \"Cre lineage tracing, Ptf1a null analysis, and Pdx1 transgene rescue in mice\",\n      \"pmids\": [\"12185368\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct PTF1A targets driving fate choice not yet defined\", \"Inductive signals turning on Ptf1a unknown\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Linked PTF1A to human disease and mapped a functionally critical C-terminal domain beyond the bHLH, while extending its requirement to the cerebellum.\",\n      \"evidence\": \"Positional cloning of truncating mutations, deletion-mutant reporter assays, mouse neuropathology\",\n      \"pmids\": [\"15543146\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular role of the C-terminal domain not defined\", \"Neuronal targets unidentified\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Identified the upstream inductive signal, showing aortic endothelium triggers PTF1A expression to initiate dorsal pancreatic budding.\",\n      \"evidence\": \"Tissue recombination with Flk1-/- endothelium-deficient embryos and in situ hybridization\",\n      \"pmids\": [\"14736742\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular identity of the endothelial signal not defined\", \"Transcriptional intermediaries linking signal to Ptf1a unknown\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Generalized PTF1A as a determinant of GABAergic over glutamatergic neuronal fate, demonstrating both necessity and sufficiency in CNS progenitors.\",\n      \"evidence\": \"Cerebelless and null mutant analysis, lineage tracing, and ectopic expression by electroporation in cerebellum and spinal cord\",\n      \"pmids\": [\"16039563\", \"16291784\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct neural target genes not yet identified\", \"Whether the same PTF1 complex operates in neurons not yet shown\"]\n    },\n    {\n      \"year\": 2006,\n      \"claim\": \"Defined the biochemical complex and its negative regulators, establishing PTF1A as a DNA-binding subunit inhibited by direct HES/Hey binding.\",\n      \"evidence\": \"Co-IP, yeast two-hybrid, GST pulldown, and reporter assays mapping the trimeric PTF1 complex and HES interaction domains\",\n      \"pmids\": [\"16201968\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"In vivo relevance of HES inhibition to specific tissues not tested\", \"Stoichiometry and structure of the complex unresolved\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Extended PTF1A's inhibitory-neuron specification role to the retina and climbing-fiber neurons and placed it downstream of Foxn4.\",\n      \"evidence\": \"Conditional knockout, lineage tracing, fate mapping, and immunohistochemistry in retina and hindbrain\",\n      \"pmids\": [\"17075007\", \"17301087\", \"17928434\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct retinal/hindbrain targets not defined here\", \"Mechanism of partial trans-differentiation unclear\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Demonstrated direct genomic occupancy and autoregulation, showing PTF1A binds the Pdx1 area III and its own enhancer to lock in acinar identity.\",\n      \"evidence\": \"ChIP from embryonic pancreas, transgenic reporters with site mutagenesis, EMSA, and cell transfection\",\n      \"pmids\": [\"17403901\", \"18606784\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Genome-wide target set not yet defined\", \"Quantitative contribution of autoregulation to cell-fate thresholds unresolved\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Established PTF1A as a cross-repressive lineage switch with Nkx6 factors operating within a defined competence window.\",\n      \"evidence\": \"Reciprocal gain- and loss-of-function mouse models and lineage tracing\",\n      \"pmids\": [\"20627083\", \"18634777\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism of the competence window not defined\", \"Direct repressed endocrine targets not enumerated\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Identified the first direct neural targets and the regulatory grammar controlling Ptf1a levels, unifying its pancreatic and neural mechanisms.\",\n      \"evidence\": \"ChIP from neural tube, in vivo gain/loss of function in chick and mouse, reporter mutagenesis for Neurog2, Nephrin, Neph3 and autoregulatory elements\",\n      \"pmids\": [\"19641016\", \"19887377\", \"19741120\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Full neural target repertoire incomplete\", \"How initiation versus maintenance enhancers are switched not resolved\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Showed PTF1A activity is post-translationally gated by p/CAF acetylation at Lys200, required for full transcriptional output.\",\n      \"evidence\": \"Co-IP from acinar cells, ChIP at target promoters, and K200R mutagenesis with reporter assays\",\n      \"pmids\": [\"18834332\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Deacetylase counter-regulator not identified\", \"In vivo phenotype of acetylation-defective PTF1A not tested\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Defined Id3 as a regulator of PTF1A subcellular localization, linking gastrin signaling to cytoplasmic mislocalization of PTF1A.\",\n      \"evidence\": \"Co-IP, Id3 siRNA, and subcellular imaging in AR4-2J acinar cells\",\n      \"pmids\": [\"20830706\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single lab, two-method study without in vivo validation\", \"Direct nuclear import machinery not identified\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Uncovered a Ptf1a-Dll1-Hes1 feedback circuit promoting progenitor proliferation, and showed continuous PTF1A is required to maintain acinar identity.\",\n      \"evidence\": \"Genetic epistasis mouse models, BrdU proliferation assays, and zebrafish lineage tracing under Ptf1a antagonism\",\n      \"pmids\": [\"22096075\", \"21497092\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"The zebrafish maintenance result is single-lab\", \"How the circuit balances proliferation versus differentiation not fully resolved\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Mapped the genome-wide pancreatic target network, establishing PTF1A as a direct upstream activator of the progenitor transcription-factor program.\",\n      \"evidence\": \"ChIP-seq and RNA profiling from pancreatic progenitors with reporter validation of Mnx1, Pdx1, Nkx6.1, Onecut1\",\n      \"pmids\": [\"22232429\", \"22372950\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Rbms3 post-transcriptional control is single-lab\", \"Hierarchy among co-regulated targets not resolved\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Explained tissue-specific binding and identified a key neural effector, showing chromatin accessibility and Foxa2 constrain PTF1A while Prdm13 enforces inhibitory fate downstream.\",\n      \"evidence\": \"ChIP-seq in pancreas and neural tube, open-chromatin analysis, co-transfection synergy, and gain/loss of function for Prdm13 in Xenopus and mouse\",\n      \"pmids\": [\"23754747\", \"24370451\", \"23339455\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Determinants directing PTF1A to tissue-specific open chromatin not fully defined\", \"ICAT regulation tested largely in vitro\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Established that ectopic or mislocalized PTF1A expression causes disease, and that human enhancer mutations are a major cause of isolated pancreatic agenesis.\",\n      \"evidence\": \"KO/KI mouse models of an ETn insertion (Danforth's short tail) and whole-genome sequencing plus enhancer reporter assays in human pancreatic agenesis\",\n      \"pmids\": [\"23437000\", \"23436999\", \"24212882\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Endogenous factors normally restraining ectopic Ptf1a expression not defined\", \"How the distal enhancer integrates upstream inputs incomplete\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Defined PTF1A as a pancreatic tumor suppressor whose loss creates a KRAS-permissive metaplastic state.\",\n      \"evidence\": \"Conditional knockout, RNA-seq, KRAS combination mouse models, and human PanIN tissue analysis\",\n      \"pmids\": [\"26151762\", \"25966682\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct transcriptional targets mediating tumor suppression not fully mapped\", \"Whether restoring PTF1A reverses metaplasia not tested\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Showed adult acinar identity is actively maintained by direct PTF1A control of digestive-enzyme, UPR, and transcription-factor network genes.\",\n      \"evidence\": \"RNA-seq and ChIP-seq from adult pancreas after conditional Ptf1a depletion\",\n      \"pmids\": [\"27697859\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Order of events from PTF1A loss to metaplasia not resolved\", \"Cofactor changes accompanying maintenance not defined\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Demonstrated PTF1A alone reprograms fibroblasts into induced neural stem cells via Notch-independent Rbpj interaction, revealing potent fate-instructive capacity.\",\n      \"evidence\": \"Direct reprogramming of mouse and human fibroblasts, Co-IP, transcriptomics, and transplantation\",\n      \"pmids\": [\"30030434\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Genome-wide reprogramming targets not yet mapped at this stage\", \"Efficiency-limiting cofactors unknown\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Linked acute PTF1A loss to ER-stress apoptosis and extended its role to hypothalamic sexual differentiation.\",\n      \"evidence\": \"Conditional homozygous knockout with EM and UPR western blots; conditional KO with behavioral and Kiss1 expression analysis\",\n      \"pmids\": [\"30361559\", \"29972793\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Both findings are single-lab\", \"Direct PTF1A targets in the UPR and hypothalamic programs not defined\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Showed autoregulatory feedback sets the PTF1A dose required to specify specific inhibitory interneuron subtypes that gate itch and movement-related sensory information.\",\n      \"evidence\": \"Targeted cis-regulatory mutations, neuron ablation/chemogenetics, anatomical tracing, and behavioral testing in mice\",\n      \"pmids\": [\"32241803\", \"33238109\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Quantitative dose-response between PTF1A levels and subtype output not fully defined\", \"Circuit downstream of these neurons partially characterized\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Began defining how PTF1A reorganizes chromatin architecture, binding subTAD boundaries and modulating enhancers during fate transitions.\",\n      \"evidence\": \"Hi-C, ChIP-seq (PTF1A, CTCF, H3K27ac), and RNA-seq multiomics during fibroblast-to-NSC transdifferentiation\",\n      \"pmids\": [\"39537822\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No functional mutagenesis of specific boundaries\", \"Causality between boundary binding and gene activation not established\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How PTF1A protein dosage, post-translational modification, cofactor availability, and 3D chromatin remodeling are integrated to select between the pancreatic and neural transcriptional programs in different tissues remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Structural basis of PTF1 trimer assembly and DNA recognition undefined\", \"Determinants that pioneer or constrain PTF1A access to tissue-specific chromatin incompletely mapped\", \"Mechanism switching PTF1A between RBPJ- and RBPJL-containing complexes not resolved\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [0, 6, 8, 11, 14, 21, 33]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [0, 8, 14, 15, 21, 24]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [18]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [1, 4, 5, 13]},\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [0, 8, 11, 21, 33]},\n      {\"term_id\": \"R-HSA-112316\", \"supporting_discovery_ids\": [4, 5, 12, 38]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [2, 27, 30]},\n      {\"term_id\": \"R-HSA-4839726\", \"supporting_discovery_ids\": [24, 40]}\n    ],\n    \"complexes\": [\"PTF1 complex (PTF1A-E protein-RBPJ/RBPJL)\"],\n    \"partners\": [\"RBPJ\", \"RBPJL\", \"HES1\", \"p/CAF\", \"ID3\", \"ICAT\", \"FOXA2\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":8,"faith_total":8,"faith_pct":100.0}}