{"gene":"POMC","run_date":"2026-06-10T06:43:35","timeline":{"discoveries":[{"year":1980,"finding":"The bovine POMC (ACTH-β-LPH precursor) gene contains a single intron of ~2.2 kb that separates a small exon encoding the signal peptide from a large exon encoding most of the protein structure, including all known biologically active component peptides (ACTH, β-endorphin, MSH sequences).","method":"Genomic DNA cloning, restriction mapping, and nucleotide sequencing of bovine genomic DNA fragments","journal":"Nature","confidence":"High","confidence_rationale":"Tier 1 / Strong — direct sequencing of genomic DNA with clear structural determination, foundational result replicated by multiple subsequent studies","pmids":["6253815"],"is_preprint":false},{"year":1980,"finding":"The rat POMC gene coding region (from amino acid 19 to the poly-A site, encompassing all biologically active peptides including γ-MSH, ACTH, β-endorphin) contains no intervening sequences; the DNA encoding the putative γ-MSH and preceding sequence is highly conserved between rat and cow.","method":"Rat genomic DNA library cloning and DNA sequencing","journal":"Nature","confidence":"High","confidence_rationale":"Tier 1 / Strong — direct sequencing of genomic DNA, confirmed and extended by Nakanishi et al. independently","pmids":["6255341"],"is_preprint":false},{"year":1984,"finding":"Glucocorticoid feedback inhibits ACTH secretion via three temporally distinct mechanisms: (1) fast feedback at the cell membrane inhibiting stimulus-secretion coupling without requiring protein synthesis; (2) intermediate feedback requiring synthesis of a corticosteroid-dependent protein that reduces stimulated ACTH release; (3) slow feedback via the classical genomic mechanism reducing pituitary POMC mRNA levels and thereby decreasing ACTH content and basal secretion.","method":"In vitro corticotrope secretion assays, in vivo pharmacology, analysis of POMC mRNA levels","journal":"Endocrine reviews","confidence":"Medium","confidence_rationale":"Tier 2 / Strong — multiple orthogonal in vitro and in vivo experimental approaches across many studies summarized; review paper but based on primary experimental evidence","pmids":["6323158"],"is_preprint":false},{"year":1989,"finding":"A 543-bp fragment in the 5'-flanking region of the POMC gene is sufficient for cell-specific pituitary expression and contains a negative glucocorticoid response element (nGRE) in the proximal promoter that binds both the glucocorticoid receptor and COUP-family transcription factors in a mutually exclusive manner, mediating glucocorticoid repression of POMC transcription.","method":"DNA-mediated gene transfer into transgenic mice and tissue culture cells, DNA-binding assays with nuclear proteins","journal":"Genome","confidence":"High","confidence_rationale":"Tier 1 / Strong — reconstitution in transgenic mice combined with cell culture transfection and DNA-protein binding assays; two orthogonal systems","pmids":["2698828"],"is_preprint":false},{"year":1994,"finding":"Ectopic ACTH syndrome is characterized by aberrant processing of POMC such that ACTH precursors (pro-ACTH/POMC) rather than fully processed ACTH are the predominant circulating forms; chromatographic analysis confirmed ACTH precursors as the major immunoreactive species, with ACTH precursor levels correlating with cortisol whereas ACTH itself did not.","method":"Specific monoclonal-based immunoradiometric assays for ACTH and ACTH precursors, plasma chromatography under acid-dissociating conditions","journal":"Clinical endocrinology","confidence":"High","confidence_rationale":"Tier 1 / Moderate — specific IRMA assays plus chromatographic biochemical characterization in patient cohort; two orthogonal methods","pmids":["8137518"],"is_preprint":false},{"year":2000,"finding":"Spatiotemporal expression of POMC mRNA and processing of POMC-derived peptides (β-endorphin, ACTH, β-MSH, α-MSH) in murine skin is cell-specific and depends on the differential expression of prohormone convertases PC1 and PC2, which are present in the same cells as POMC peptides; PC1 and PC2 activities drive cell-specific differential POMC processing in the skin.","method":"In situ hybridization histochemistry and immunohistochemistry in anagen hair follicle murine skin","journal":"The journal of histochemistry and cytochemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-localization of convertases and peptide products by two orthogonal histological methods; single lab","pmids":["10858267"],"is_preprint":false},{"year":2001,"finding":"Leptin increases action potential frequency in hypothalamic POMC neurons by two mechanisms: direct depolarization through a nonspecific cation channel, and reduced inhibitory input from local orexigenic NPY/GABA neurons. Additionally, melanocortin peptides exert an autoinhibitory effect on this circuit.","method":"Electrophysiological recordings (patch-clamp) on GFP-tagged POMC neurons in transgenic mice","journal":"Nature","confidence":"High","confidence_rationale":"Tier 1 / Strong — direct electrophysiology with cell-type identification in transgenic mice, two distinct mechanisms identified with pharmacological dissection","pmids":["11373681"],"is_preprint":false},{"year":2001,"finding":"Human skin keratinocytes and dermal fibroblasts locally express both CRH and POMC mRNA (co-expressed in the same cells), demonstrated by in situ RT-PCR combined with laser-capture microdissection, indicating local POMC production rather than uptake from the CNS.","method":"In situ reverse-transcription PCR, immunohistochemistry, laser-capture microdissection combined with RT-PCR","journal":"FASEB journal","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — three orthogonal methods (in situ RT-PCR, IHC, LCM+RT-PCR) in single lab confirming local expression","pmids":["11511529"],"is_preprint":false},{"year":2005,"finding":"CRH stimulates POMC gene and protein expression, ACTH production and release, and corticosterone production in human dermal fibroblasts (but not keratinocytes) via cAMP signaling, establishing a functional CRH-POMC-corticosteroid axis in fibroblasts analogous to the HPA axis.","method":"cAMP assay, POMC gene/protein expression, ACTH ELISA, corticosterone measurement in fibroblast and keratinocyte cell cultures treated with CRH and ACTH","journal":"Journal of neuroimmunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple biochemical readouts (cAMP, mRNA, protein, hormone secretion) in cell culture; single lab","pmids":["15833364"],"is_preprint":false},{"year":2008,"finding":"LXR-α positively regulates POMC gene transcription in pituitary by binding as a RXR-α/LXR-α heterodimer to a region between -73 and -52 bp in the rat POMC promoter; LXR agonist treatment increased POMC mRNA, ACTH content, and plasma ACTH/corticosterone, and siRNA knockdown of LXR-α abolished promoter activation.","method":"EMSA, ChIP, luciferase reporter assays, siRNA knockdown, in vivo LXR agonist treatment with ACTH/corticosterone measurement","journal":"Molecular endocrinology","confidence":"High","confidence_rationale":"Tier 1 / Moderate — multiple orthogonal methods including EMSA, ChIP, reporter assay, and siRNA rescue; single lab but 4 different assays","pmids":["19036902"],"is_preprint":false},{"year":2010,"finding":"PTP1B and SHP2 in POMC neurons reciprocally regulate energy balance: POMC-specific PTP1B deletion improves leptin sensitivity and glucose homeostasis, while POMC-specific SHP2 deletion impairs leptin sensitivity and markedly reduces hypothalamic POMC mRNA and α-MSH peptide levels, implicating SHP2 in normal melanocortin system function.","method":"Cre-LoxP conditional knockout mice, measurement of adiposity, leptin sensitivity, energy expenditure, POMC mRNA, α-MSH peptide levels, and hyperinsulinemic-euglycemic clamp","journal":"The Journal of clinical investigation","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean neuron-specific genetic KO with multiple orthogonal metabolic and molecular phenotypic readouts in vivo","pmids":["20160350"],"is_preprint":false},{"year":2010,"finding":"PDK-1 and FoxO1 signaling in POMC neurons regulate POMC gene transcription and food intake: POMC-neuron-specific PDK-1 knockout decreases Pomc gene expression and increases food intake/body weight; constitutively nuclear FoxO1 in POMC neurons further suppresses Pomc expression in PDK-1 KO mice, while transactivation-defective FoxO1 has no effect.","method":"POMC neuron-specific Pdk1 knockout mice; transgenic mice expressing constitutively nuclear or transactivation-defective FoxO1 in POMC neurons; food intake, body weight, and Pomc mRNA measurement","journal":"American journal of physiology. Endocrinology and metabolism","confidence":"High","confidence_rationale":"Tier 2 / Moderate — neuron-specific genetic epistasis using multiple transgenic lines with molecular (mRNA) and physiological readouts","pmids":["20103739"],"is_preprint":false},{"year":2013,"finding":"POMC mutation p.R8C causes bioinactive ACTH and α-MSH: ACTH-R8C is immunoreactive but fails to bind and activate cAMP production in MC2R-expressing cells, and α-MSH-R8C fails to bind and stimulate cAMP in MC1R- and MC4R-expressing cells, demonstrating that residue R8 (within the HFRW motif) is essential for receptor binding and activation.","method":"Whole exome sequencing, Sanger sequencing, peptide synthesis, ACTH immunoradiometric assay, hormone binding assays, cAMP activation assays in cells expressing MC1R, MC2R, or MC4R","journal":"The Journal of clinical endocrinology and metabolism","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro reconstitution with synthetic mutant peptides, binding and functional cAMP assays in multiple receptor-expressing cell lines; natural human experiment with genetic confirmation","pmids":["23293326"],"is_preprint":false},{"year":2014,"finding":"Early-life stress reduces DNA methylation at a critical regulatory region of the Pomc promoter in pituitary, increasing Pomc mRNA; site-specific CpG methylation of the Pomc promoter represses Pomc mRNA transcription, and methyl-CpG binding protein-2 (MeCP2) binds the distal Pomc promoter in association with HDAC2 and DNMT1 to mediate this repression.","method":"Bisulfite sequencing, promoter methylation analysis, AtT20 pituitary cell transfection, ChIP for MeCP2/HDAC2/DNMT1 at the Pomc promoter","journal":"Endocrinology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — bisulfite sequencing plus ChIP in cell line; two orthogonal methods but single lab","pmids":["24506071"],"is_preprint":false},{"year":2015,"finding":"CB1R activation selectively increases β-endorphin but not α-MSH release from hypothalamic POMC neurons; this β-endorphin release mediates CB1R-induced feeding because the opioid receptor antagonist naloxone (systemic or hypothalamic) blocks CB1R-induced hyperphagia. DREADD-mediated inhibition of POMC neurons diminishes, while activation enhances, CB1R-driven feeding.","method":"DREADD chemogenetics, hypothalamic β-endorphin and α-MSH measurement, naloxone pharmacology, mitochondrial functional assays in mice","journal":"Nature","confidence":"High","confidence_rationale":"Tier 2 / Strong — chemogenetic circuit manipulation, peptide-specific release measurement, and pharmacological rescue with multiple orthogonal approaches","pmids":["25707796"],"is_preprint":false},{"year":2015,"finding":"POMC-expressing progenitors in the hypothalamus give rise not only to POMC and AgRP neurons but also to Kiss1 neurons critical for puberty and reproductive function, establishing a developmental link between nutrient-sensing and reproductive neuroendocrine populations.","method":"Embryonic and adult ribosome-tagging Cre/loxP lineage tracing in mice","journal":"The Journal of neuroscience","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic lineage tracing with two complementary recombinase strategies; single lab","pmids":["25855171"],"is_preprint":false},{"year":2016,"finding":"GPR45 regulates POMC expression via the JAK/STAT signaling pathway in a cell-autonomous manner; disruption of Gpr45 reduces POMC expression and energy expenditure, and these effects are rescued by intraventricular melanocortin agonist (melanotan-2).","method":"Piggyback insertional mutagenesis screen, Gpr45 knockout mice, POMC mRNA measurement, JAK/STAT pathway analysis, intracerebroventricular drug rescue","journal":"The Journal of clinical investigation","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — KO phenotype with pathway identification by cell-autonomous assays and pharmacological rescue; single lab","pmids":["27500489"],"is_preprint":false},{"year":2016,"finding":"IRE1α in POMC neurons is required for normal energy expenditure, thermogenesis, and glucose homeostasis; its loss elevates ER stress in POMC neurons and predisposes them to leptin and insulin resistance.","method":"POMC neuron-specific Ire1α conditional knockout mice, metabolic phenotyping (energy expenditure, thermogenesis, glucose tolerance, insulin tolerance), ER stress marker measurement","journal":"Diabetes","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — neuron-specific genetic KO with multiple metabolic readouts; single lab","pmids":["28028078"],"is_preprint":false},{"year":2016,"finding":"E2F1 mediates ectopic POMC transcription in non-pituitary tumor cells independently of the pituitary-specific Tpit/Pitx1 factors; an E2F1 cluster binds the proximal hPOMC promoter (-42 to +68), with DNA-binding activity regulated by phosphorylation at Ser-337; E2F1/DP1 co-expression upregulates hPOMC mRNA up to 40-fold, and E2F1 inhibitors suppress ACTH in ectopic Cushing's cell lines and xenograft models.","method":"Promoter luciferase assays, ChIP, site-directed mutagenesis of E2F1 Ser-337, siRNA knockdown, xenograft mouse model with ACTH/cortisol measurement","journal":"Endocrine-related cancer","confidence":"High","confidence_rationale":"Tier 1 / Moderate — multiple orthogonal methods (ChIP, reporter assay, mutagenesis, in vivo xenograft) establishing mechanism; single lab","pmids":["27935805"],"is_preprint":false},{"year":2017,"finding":"TrpC5 channel subunits in POMC neurons are required for the acute anorexigenic electrophysiological and behavioral responses to leptin and serotonin 2C receptor (Ht2Cr) agonists; POMC-specific Trpc5 deletion blunts depolarization of POMC neurons by both stimuli and abolishes their anorectic effects.","method":"POMC neuron-specific and pan-neuronal Trpc5 conditional knockout mice, electrophysiology (patch-clamp), food intake measurement, glucose/insulin tolerance tests","journal":"Cell reports","confidence":"High","confidence_rationale":"Tier 2 / Strong — neuron-specific KO with electrophysiological (cellular) and behavioral (whole-organism) orthogonal readouts confirming channel as molecular mediator","pmids":["28099839"],"is_preprint":false},{"year":2017,"finding":"DRP1-mediated mitochondrial fission in POMC neurons suppresses their leptin sensitivity and glucose responsiveness; inducible deletion of DRP1 in POMC neurons increases mitochondrial size, ROS production, and neuronal activation via increased Kcnj11 (KATP channel) mRNA regulated by PPAR, improving leptin sensitivity and glucoprivic responses.","method":"Inducible POMC neuron-specific Drp1 conditional knockout (Drp1fl/fl-POMC-cre:ERT2), electron microscopy, electrophysiology, ROS measurement, qPCR, PPAR inhibition","journal":"Cell metabolism","confidence":"High","confidence_rationale":"Tier 2 / Moderate — inducible neuron-specific KO with multiple orthogonal cellular (EM, electrophysiology, ROS, mRNA) readouts; single lab","pmids":["28190775"],"is_preprint":false},{"year":2017,"finding":"TNFα hypersecretion from persistently activated microglia in the mediobasal hypothalamus of obese mice stimulates mitochondrial ATP production and fusion in POMC neuron neurites, increasing POMC neuronal firing rates and excitability; disruption of TNFα downstream signals TNFSF11A or NDUFAB1 in the MBH reverses mitochondrial elongation and reduces obesity.","method":"Diet-induced obesity mouse model, microglial activation assays, TNFα measurement, mitochondrial morphology analysis, electrophysiology, targeted gene disruption (viral knockdown) in the MBH","journal":"Nature communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple cellular and in vivo approaches; causal pathway established by targeted gene disruption; single lab","pmids":["28489068"],"is_preprint":false},{"year":2017,"finding":"NeuroD1 mediates glucocorticoid-dependent repression of Pomc transcription: glucocorticoids inhibit NeuroD1 expression and the interaction of NeuroD1 with the E-box at -376/-371 of the Pomc promoter; overexpression of NeuroD1 rescues DEX-mediated inhibition of Pomc expression.","method":"Luciferase reporter assay with Pomc promoter deletion/point mutants, ChIP, qRT-PCR, NeuroD1 overexpression rescue in AtT20 cells","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 1 / Moderate — promoter mutagenesis, ChIP, and rescue experiment; multiple methods; single lab, cell line model","pmids":["28406939"],"is_preprint":false},{"year":2018,"finding":"TCPTP (T-cell protein tyrosine phosphatase) in POMC neurons negatively regulates insulin receptor signaling and the proportion of POMC neurons activated by insulin; TCPTP levels increase with fasting and in diet-induced obesity, reducing insulin-induced POMC neuronal activation and POMC-mediated repression of hepatic glucose production.","method":"TCPTP-deficient POMC neuron mouse model, c-fos neuronal activation assays, hyperinsulinemic-euglycemic clamp, hepatic glucose production measurement","journal":"eLife","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — neuron-specific KO with clamp studies and neuronal activation readouts; single lab","pmids":["30230471"],"is_preprint":false},{"year":2018,"finding":"SGK1/FOXO3 signaling in POMC neurons mediates glucocorticoid-induced adiposity: chronic glucocorticoid decreases SGK1 in arcuate POMC neurons; POMC-specific SGK1 knockout increases adiposity and decreases α-MSH/POMC expression via FOXO3; constitutively active SGK1 in POMC neurons prevents dexamethasone-induced adiposity. ICV α-MSH or FOXO3 knockdown rescue the metabolic phenotype.","method":"POMC neuron-specific SGK1 conditional KO and overexpression mice, POMC/α-MSH mRNA/protein measurement, ICV injection of α-MSH, adenoviral FOXO3 knockdown, body composition analysis","journal":"Diabetes","confidence":"High","confidence_rationale":"Tier 2 / Strong — conditional KO plus constitutively active overexpression plus pharmacological rescue; multiple orthogonal approaches across a single lab","pmids":["29321171"],"is_preprint":false},{"year":2018,"finding":"The Sel1L-Hrd1 ER-associated degradation (ERAD) complex in POMC neurons targets a fraction of nascent POMC for ubiquitination and proteasomal degradation, preventing accumulation of misfolded/aggregated POMC and enabling normal POMC processing and secretion. POMC-specific Sel1L deficiency causes POMC ER retention and hyperphagia-driven age-associated obesity. The disease-associated POMC-C28F mutant evades ERAD and aggregates due to an unpaired cysteine thiol at position 50.","method":"POMC neuron-specific Sel1L knockout mice, ubiquitination assays, proteasome inhibition, ER fractionation, co-immunoprecipitation, POMC-C28F mutant biochemical characterization","journal":"The Journal of clinical investigation","confidence":"High","confidence_rationale":"Tier 1 / Moderate — reconstitution-level biochemistry (ubiquitination, fractionation, mutant analysis) combined with in vivo neuron-specific KO; multiple orthogonal methods","pmids":["29457782"],"is_preprint":false},{"year":2019,"finding":"The BBSome complex in POMC neurons regulates trafficking of G protein-coupled receptors including serotonin 5-HT2CR to the plasma membrane and NPY2R to cilia; Bbs1 deletion in POMC neurons reduces cell surface 5-HT2CR expression, interferes with serotonin-evoked calcium signaling and membrane depolarization, and causes obesity with hyperphagia.","method":"POMC neuron-specific Bbs1 conditional KO mice, flow cytometry for receptor surface expression, calcium imaging, electrophysiology, lorcaserin anorectic response testing, late endosome staining","journal":"Diabetes","confidence":"High","confidence_rationale":"Tier 2 / Strong — neuron-specific KO with multiple orthogonal mechanistic readouts (receptor trafficking, calcium signaling, electrophysiology, pharmacological challenge) in a single study","pmids":["31127052"],"is_preprint":false},{"year":2019,"finding":"MCH reduces POMC neuronal activity and POMC expression through SIRT1/FoxO1 signaling in the hypothalamic arcuate nucleus; the metabolic (hyperphagia, adiposity, glucose intolerance) actions of MCH are abolished in mice lacking SIRT1 specifically in POMC neurons, and are independent of AgRP neurons.","method":"Pharmacological MCH injection, POMC neuron-specific SIRT1 knockout mice, chemogenetic AgRP neuron stimulation, POMC electrophysiology, POMC mRNA measurement","journal":"Diabetes","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — cell-specific KO with chemogenetic circuit dissection and electrophysiological readouts; single lab","pmids":["31530579"],"is_preprint":false},{"year":2020,"finding":"Hypothalamic arcuate POMC neurons regulate circulating adiponectin via sympathetic outflow to adipose tissue: ArcPomc-deficient mice have elevated adiponectin despite obesity, which is reversed by genetic restoration of Pomc in the ARC or by melanocortin receptor activation (melanotan II), and is mediated through norepinephrine-dependent adrenergic signaling in adipose tissue.","method":"ArcPomc-/- mice, genetic Pomc restoration, ICV/peripheral melanotan II, norepinephrine and propranolol injections, adiponectin ELISA, sympathetic marker measurement in adipose tissue","journal":"Molecular metabolism","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple pharmacological and genetic interventions showing pathway; single lab","pmids":["32244188"],"is_preprint":false},{"year":2020,"finding":"Optogenetic activation of the ARCPOMC→MeA neural circuit (POMC axon projections to MC4R- and estrogen receptor-α-expressing neurons in the medial amygdala) reduces short-term food intake, and this anorectic effect is blocked by the MC4R antagonist SHU9119.","method":"Anterograde and retrograde viral tracing, double immunohistochemistry, channelrhodopsin-2 optogenetics, MC4R antagonist pharmacology","journal":"Frontiers in neural circuits","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — optogenetic circuit activation with pharmacological receptor identification; single lab","pmids":["33250721"],"is_preprint":false},{"year":2021,"finding":"POMC neurons in the arcuate nucleus are depolarized by lactate through two mechanisms: (1) activation of HCAR1 receptors located on astrocytes (not POMC neurons themselves), acting as an intercellular signaling relay (blocked by pertussis toxin), and (2) direct intracellular action via lactate transporters in a subset of POMC neurons (blocked by 4-CIN).","method":"Conditional genetic labeling of POMC neurons, whole-cell patch-clamp recordings, HCAR1 agonist (3Cl-HBA), pertussis toxin (Gαi/o inhibitor), 4-CIN (lactate transporter blocker), immunohistochemistry for HCAR1 localization","journal":"Scientific reports","confidence":"Medium","confidence_rationale":"Tier 1 / Moderate — electrophysiology with pharmacological dissection of two mechanisms; receptor localization by IHC; single lab","pmids":["34737351"],"is_preprint":false},{"year":2021,"finding":"Functionally distinct subpopulations of POMC neurons defined by leptin receptor (Lepr) and GLP-1 receptor (Glp1r) expression are largely non-overlapping, have distinct basic electrophysiological properties, specific anatomical distribution within the arcuate nucleus, differentially express metabolic hormone receptors, and differ in their ability to suppress feeding.","method":"Intersectional Cre/Dre-dependent recombination mouse models, translational profiling, electrophysiology, chemogenetics, feeding assays","journal":"Nature neuroscience","confidence":"High","confidence_rationale":"Tier 2 / Strong — novel intersectional genetic tools combined with translational profiling, electrophysiology, and chemogenetic functional assays in a single rigorous study","pmids":["34002087"],"is_preprint":false},{"year":2021,"finding":"mTORC1 activity in POMC neurons orchestrates the balance between POMC/GABAergic and POMC/glutamatergic subpopulations: mTORC1 blockade decreases α-MSH production, recruits POMC/GABAergic neurotransmission (restrained by CB1R signaling), simultaneously activates GABAergic POMC neurons and inhibits glutamatergic POMC neurons, causing hyperphagia.","method":"Conditional mTORC1 mutagenesis in POMC neurons, α-MSH measurement, chemogenetics, electrophysiology, optogenetics, CB1R pharmacology","journal":"Cell reports","confidence":"High","confidence_rationale":"Tier 2 / Strong — conditional genetics plus chemogenetics plus optogenetics plus electrophysiology in a single study; multiple orthogonal circuit-level methods","pmids":["34644574"],"is_preprint":false},{"year":2021,"finding":"Mild mitoribosomal stress (Crif1 heterodeficiency) in POMC neurons increases β-endorphin and mitochondria-encoded peptide MOTS-c expression; central administration of either MOTS-c or β-endorphin recapitulates adipose tissue UPRmt and thermogenesis, identifying these POMC neuron-derived factors as mediators of exercise-induced high-turnover metabolism.","method":"POMC neuron-specific Crif1 homo- and heterodeficient mice, central peptide injection, adipose tissue UPRmt and thermogenesis measurement, running exercise paradigm","journal":"Cell metabolism","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — neuron-specific genetic model plus central peptide injection rescue; single lab","pmids":["33535098"],"is_preprint":false},{"year":2021,"finding":"In diabetic mice, POMC-mediated antinociception in sensory neurons is lost because NF-κB p50 subunit binding to the Pomc promoter is increased, repressing Pomc transcription; additionally, μ-opioid receptor (MOR) undergoes lysosomal degradation. Viral overexpression of POMC and MOR in sensory ganglia rescues the neuropathic phenotype.","method":"Streptozotocin diabetic mouse model, ChIP for NF-κB p50 at Pomc promoter, POMC protein/mRNA quantification in peripheral nerves, MOR lysosomal degradation assay, viral overexpression rescue","journal":"Nature communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP establishes transcriptional mechanism; viral rescue confirms causality; single lab","pmids":["33462216"],"is_preprint":false},{"year":2024,"finding":"AZGP1 in POMC neurons enhances leptin-JAK2-STAT3 signaling by interacting with acylglycerol kinase (AGK) to block AGK's ubiquitination-dependent degradation; POMC neuron-specific Azgp1 overexpression increases STAT3 phosphorylation and POMC neuronal excitability, reducing food intake and improving metabolic parameters.","method":"POMC neuron-specific Azgp1 overexpression and inducible KO mice, Co-IP for AZGP1-AGK interaction, ubiquitination assays, STAT3 phosphorylation (western blot), patch-clamp electrophysiology","journal":"Nature communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP plus ubiquitination assay establish molecular interaction; electrophysiology and metabolic phenotyping; single lab","pmids":["38643150"],"is_preprint":false},{"year":2024,"finding":"Fam172a in POMC neurons acts as a negative regulator of histone lactylation (H4K12la): POMC neuron-specific Fam172a deletion increases H4K12la, activates glycolysis, and upregulates peptidylglycine α-amidating monooxygenase (PAM) expression, increasing α-MSH synthesis and protecting against diet-induced obesity; pharmacological inhibition of lactate production abolishes the anti-obesity effect.","method":"POMC neuron-specific Fam172a KO and overexpression mice, RNA-seq, CUT&Tag chromatin profiling for H4K12la, PAM expression analysis, α-MSH measurement, lactate inhibitor treatment","journal":"Nature communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — chromatin profiling (CUT&Tag) establishes histone modification mechanism; genetic KO and OE plus pharmacological rescue; single lab","pmids":["39578459"],"is_preprint":false}],"current_model":"POMC encodes a polyprotein precursor that is tissue-specifically cleaved by prohormone convertases PC1 and PC2 to produce ACTH, α-MSH, β-endorphin, and other peptides; in hypothalamic arcuate POMC neurons—functionally heterogeneous subpopulations defined by Lepr, Glp1r, and neurotransmitter identity—POMC expression and neuronal activity are regulated by leptin (via JAK/STAT and LepRb somato-dendritic signaling), insulin (via IR/PDK-1/FoxO1/TCPTP), glucose and lactate (via intracellular and astrocyte-to-neuron HCAR1 signaling), CB1R (selectively releasing β-endorphin over α-MSH), and mitochondrial dynamics (DRP1-mediated fission, TNFα-driven fusion, and mitohormesis via Crif1); at the transcriptional level, POMC is repressed by glucocorticoids through a proximal nGRE (competing with COUP factors), by FoxO1/FOXO3, by NeuroD1 suppression at an E-box, and by NF-κB p50 in peripheral sensory neurons in diabetes, while being activated by LXR-α (via an RXR-α/LXR-α heterodimer site at -73 to -52 bp), by MeCP2/HDAC2/DNMT1-dependent DNA methylation changes, and by histone lactylation regulated through Fam172a; newly synthesized POMC undergoes Sel1L-Hrd1 ERAD-mediated quality control in the ER to prevent misfolded/aggregated POMC accumulation, and its C-terminal α-MSH is amidated by the copper/ascorbate-dependent enzyme PAM; processed melanocortin peptides signal through MC1R, MC2R (requiring MRAP for trafficking), MC3R, and MC4R, with the HFRW motif (particularly R8) essential for receptor binding and cAMP activation, while β-endorphin acts at opioid receptors to modulate pain and feeding."},"narrative":{"mechanistic_narrative":"POMC encodes a polyprotein precursor whose protein-coding sequence resides largely within a single large exon downstream of a small signal-peptide exon, with the segment encoding its bioactive peptides (ACTH, β-endorphin, MSH peptides) highly conserved across mammals [PMID:6253815, PMID:6255341]. The precursor is cleaved cell-specifically by the prohormone convertases PC1 and PC2, which are co-expressed with POMC peptides and drive differential tissue-specific processing into α-MSH, ACTH, β-MSH, and β-endorphin [PMID:10858267]; failure of normal processing yields predominantly ACTH precursors, as seen in ectopic ACTH syndrome [PMID:8137518]. The HFRW motif of the processed melanocortin peptides is essential for receptor function: the R8 residue is required for ACTH binding and cAMP activation at MC2R and for α-MSH activation of MC1R and MC4R, and its mutation produces bioinactive hormones [PMID:23293326]. Newly synthesized POMC is subject to Sel1L-Hrd1 ERAD quality control that degrades a fraction of nascent protein to prevent misfolded/aggregated accumulation and permit normal processing and secretion [PMID:29457782]. In the hypothalamic arcuate nucleus, POMC neurons constitute the anorexigenic arm of the melanocortin system: they are depolarized by leptin and exert autoinhibition through melanocortin peptides [PMID:11373681], comprise functionally distinct Lepr- and Glp1r-defined subpopulations [PMID:34002087], and signal onward through MC4R-expressing target circuits such as the ARC→medial amygdala projection to suppress feeding [PMID:33250721]. POMC neuronal activity and Pomc expression integrate hormonal and metabolic inputs — leptin via JAK/STAT and TrpC5 channels [PMID:27500489, PMID:28099839], insulin via PDK-1/FoxO1 and TCPTP [PMID:20103739, PMID:30230471], lactate via astrocytic HCAR1 and direct uptake [PMID:34737351], CB1R, which selectively releases β-endorphin to drive feeding [PMID:25707796], and mitochondrial dynamics governing leptin sensitivity and excitability [PMID:28190775, PMID:28489068]. Pomc transcription is repressed by glucocorticoids through a proximal nGRE that competes with COUP factors [PMID:2698828] and via NeuroD1 and SGK1/FOXO3 [PMID:28406939, PMID:29321171], and activated by an RXR-α/LXR-α heterodimer [PMID:19036902], by MeCP2/HDAC2/DNMT1-dependent methylation [PMID:24506071], and by histone lactylation controlled through Fam172a, which also tunes PAM-dependent α-MSH amidation [PMID:39578459]. Loss-of-function in POMC peptide signaling underlies human disease, including the bioinactive ACTH/α-MSH phenotype caused by the p.R8C mutation [PMID:23293326].","teleology":[{"year":1980,"claim":"Established the genomic architecture of the POMC precursor gene, showing that all bioactive peptides are encoded together within a single large, evolutionarily conserved exon.","evidence":"Genomic DNA cloning and sequencing of bovine and rat POMC loci","pmids":["6253815","6255341"],"confidence":"High","gaps":["Does not address how the single transcript is processed into distinct peptides","No tissue-specific regulation defined"]},{"year":1984,"claim":"Defined glucocorticoid negative feedback on the corticotrope, distinguishing rapid non-genomic suppression of ACTH secretion from slow genomic reduction of POMC mRNA.","evidence":"In vitro corticotrope secretion assays, in vivo pharmacology, POMC mRNA analysis (review of primary data)","pmids":["6323158"],"confidence":"Medium","gaps":["Molecular DNA elements mediating genomic repression not yet identified","Identity of intermediate corticosteroid-dependent protein unknown"]},{"year":1989,"claim":"Identified the cis-regulatory basis of glucocorticoid repression, mapping a proximal nGRE that binds glucocorticoid receptor and COUP factors mutually exclusively within a fragment sufficient for pituitary-specific expression.","evidence":"Transgenic mice plus cell culture transfection and DNA-protein binding assays","pmids":["2698828"],"confidence":"High","gaps":["Does not establish in vivo contribution of COUP competition","Other regulatory inputs to the promoter not yet defined"]},{"year":1994,"claim":"Showed that aberrant POMC processing underlies ectopic ACTH syndrome, with unprocessed precursors rather than mature ACTH as the dominant circulating species.","evidence":"Specific IRMA assays and plasma chromatography in a patient cohort","pmids":["8137518"],"confidence":"High","gaps":["Molecular cause of processing failure in tumors not resolved","Convertase identity not directly assayed here"]},{"year":2000,"claim":"Demonstrated that cell-specific POMC processing depends on differential PC1 and PC2 expression co-localized with the peptide products, explaining tissue-specific peptide output.","evidence":"In situ hybridization and immunohistochemistry in murine skin","pmids":["10858267"],"confidence":"Medium","gaps":["Causal requirement for each convertase not shown by genetic deletion","Quantitative contribution to each peptide undefined"]},{"year":2001,"claim":"Established leptin's electrophysiological action on arcuate POMC neurons, identifying direct cation-channel depolarization plus reduced GABAergic inhibition as the basis of leptin-driven activation.","evidence":"Patch-clamp electrophysiology on GFP-tagged POMC neurons in transgenic mice","pmids":["11373681"],"confidence":"High","gaps":["Molecular identity of the cation channel not specified here","Downstream signaling to Pomc transcription not addressed"]},{"year":2005,"claim":"Demonstrated a local extra-pituitary CRH-POMC-corticosteroid axis in skin, with CRH driving POMC/ACTH/corticosterone output in dermal fibroblasts via cAMP.","evidence":"cAMP, mRNA, protein, and hormone assays in fibroblast and keratinocyte cultures; local co-expression by in situ RT-PCR/LCM","pmids":["15833364","11511529"],"confidence":"Medium","gaps":["Physiological significance of cutaneous POMC in vivo unclear","Convertase processing in skin fibroblasts not detailed"]},{"year":2008,"claim":"Identified a positive transcriptional regulator of POMC, showing an RXR-α/LXR-α heterodimer activates the proximal promoter and raises ACTH/corticosterone output.","evidence":"EMSA, ChIP, luciferase reporter, siRNA knockdown, in vivo LXR agonist treatment","pmids":["19036902"],"confidence":"High","gaps":["Endogenous ligand context not defined","Interaction with repressive nGRE machinery unresolved"]},{"year":2010,"claim":"Defined intracellular phosphatase and kinase control of POMC neuron leptin/insulin signaling, with PTP1B/SHP2 and PDK-1/FoxO1 regulating Pomc expression and energy balance.","evidence":"POMC neuron-specific conditional knockouts and FoxO1 transgenics with metabolic and molecular readouts","pmids":["20160350","20103739"],"confidence":"High","gaps":["Direct transcriptional targets of FoxO1 on the Pomc promoter not mapped here","Integration of phosphatase signals with channel activity unclear"]},{"year":2013,"claim":"Provided human genetic proof that the R8 residue of the HFRW motif is essential for melanocortin peptide receptor activation, as the p.R8C mutation yields immunoreactive but bioinactive ACTH and α-MSH.","evidence":"Exome/Sanger sequencing plus synthetic peptide binding and cAMP assays in MC1R/MC2R/MC4R cells","pmids":["23293326"],"confidence":"High","gaps":["Structural basis of R8 contribution not resolved","Effect on β-endorphin signaling not tested"]},{"year":2014,"claim":"Established epigenetic control of Pomc, showing CpG methylation represses transcription via MeCP2/HDAC2/DNMT1 and that early-life stress alters this mark.","evidence":"Bisulfite sequencing and ChIP in pituitary tissue and AtT20 cells","pmids":["24506071"],"confidence":"Medium","gaps":["Mechanism linking stress to methylation change not defined","Single cell-line ChIP validation"]},{"year":2015,"claim":"Revealed peptide-selective output and developmental scope of POMC cells: CB1R selectively releases β-endorphin to drive feeding, and POMC progenitors give rise to reproductive Kiss1 neurons.","evidence":"DREADD chemogenetics, peptide-specific release measurement, naloxone pharmacology, and Cre/loxP lineage tracing in mice","pmids":["25707796","25855171"],"confidence":"High","gaps":["Mechanism of differential vesicular sorting of β-endorphin vs α-MSH not defined","Functional role of POMC-derived Kiss1 neurons in adult reproduction not fully tested"]},{"year":2016,"claim":"Expanded the regulatory network controlling Pomc, identifying GPR45-JAK/STAT input, ER stress sensing via IRE1α, and Tpit/Pitx1-independent E2F1 activation in ectopic tumors.","evidence":"Knockout mouse phenotyping, pathway analysis, pharmacological rescue, promoter reporter/ChIP/xenograft studies","pmids":["27500489","28028078","27935805"],"confidence":"High","gaps":["Direct GPR45 ligand and coupling to STAT not resolved","Crosstalk between ER stress and transcription unmapped"]},{"year":2017,"claim":"Defined the molecular effectors of POMC neuron excitability and metabolic responsiveness, including TrpC5 channels for leptin/serotonin responses, glucocorticoid repression through NeuroD1, and bidirectional control by mitochondrial fission and fusion.","evidence":"Neuron-specific conditional knockouts, electrophysiology, EM, ROS measurement, promoter mutagenesis/ChIP, and DIO/microglia models","pmids":["28099839","28190775","28489068","28406939"],"confidence":"High","gaps":["How mitochondrial morphology couples to firing not fully mechanistic","Integration of NeuroD1 with nGRE repression unresolved"]},{"year":2018,"claim":"Established ER quality control and additional signaling control of POMC, showing Sel1L-Hrd1 ERAD prevents POMC aggregation, TCPTP restrains insulin signaling, and SGK1/FOXO3 mediates glucocorticoid-induced adiposity.","evidence":"Neuron-specific knockouts, ubiquitination/fractionation biochemistry, disease-mutant analysis, clamp studies, and pharmacological rescue","pmids":["29457782","30230471","29321171"],"confidence":"High","gaps":["Determinants of which nascent POMC is routed to ERAD vs secretion not defined","Connection of FOXO3 to direct Pomc promoter occupancy not shown"]},{"year":2019,"claim":"Defined receptor-trafficking control of POMC neuron signaling via the BBSome, which delivers 5-HT2CR to the surface and NPY2R to cilia, linking ciliary trafficking to satiety signaling.","evidence":"POMC neuron-specific Bbs1 KO with flow cytometry, calcium imaging, electrophysiology, and pharmacological challenge","pmids":["31127052"],"confidence":"High","gaps":["Full repertoire of BBSome-trafficked GPCRs in POMC neurons unknown","Direct effect on POMC peptide output not measured"]},{"year":2020,"claim":"Connected arcuate POMC output to peripheral physiology and downstream circuits, regulating adipose adiponectin via sympathetic outflow and suppressing feeding through an MC4R-dependent ARC→medial amygdala projection.","evidence":"ArcPomc mutant mice, melanocortin and adrenergic pharmacology, viral tracing, and channelrhodopsin optogenetics with MC4R antagonism","pmids":["32244188","33250721"],"confidence":"Medium","gaps":["Identity of melanocortin receptor mediating sympathetic adiponectin control incompletely defined","Relative contribution of MeA circuit to overall feeding control unquantified"]},{"year":2021,"claim":"Resolved POMC neuron heterogeneity and additional metabolic sensing, defining non-overlapping Lepr/Glp1r and GABAergic/glutamatergic subpopulations, mTORC1 control of neurotransmitter balance, lactate sensing via astrocytic HCAR1, mitohormesis through Crif1, and NF-κB repression of peripheral Pomc in diabetes.","evidence":"Intersectional genetics, translational profiling, electrophysiology, chemogenetics/optogenetics, pharmacology, and ChIP across multiple studies","pmids":["34002087","34644574","34737351","33535098","33462216"],"confidence":"High","gaps":["Functional division of labor among subpopulations incompletely mapped","Mechanism coupling mitoribosomal stress to peptide selection not defined"]},{"year":2024,"claim":"Identified new molecular regulators of POMC neuron signaling and peptide synthesis, with AZGP1 stabilizing AGK to amplify leptin-JAK2-STAT3 signaling and Fam172a restraining histone lactylation to control PAM expression and α-MSH synthesis.","evidence":"Neuron-specific overexpression/KO mice, Co-IP, ubiquitination assays, CUT&Tag chromatin profiling, and pharmacological rescue","pmids":["38643150","39578459"],"confidence":"Medium","gaps":["AZGP1-AGK interaction validated mainly by Co-IP in single lab","Generality of lactylation-PAM axis beyond diet-induced obesity untested"]},{"year":null,"claim":"How the diverse transcriptional, epigenetic, ER-quality-control, channel, and mitochondrial inputs are integrated within single POMC neuron subpopulations to determine the precise stoichiometry of α-MSH versus β-endorphin output remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unified model linking subpopulation identity to differential peptide secretion","Mechanism of selective vesicular sorting of POMC-derived peptides unknown","In vivo interplay among competing transcriptional regulators at the Pomc promoter not reconstructed"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0048018","term_label":"receptor ligand activity","supporting_discovery_ids":[12,14,29]},{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[3,9,18,22]}],"localization":[{"term_id":"GO:0005783","term_label":"endoplasmic reticulum","supporting_discovery_ids":[25,17]},{"term_id":"GO:0005576","term_label":"extracellular region","supporting_discovery_ids":[4,8]}],"pathway":[{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[6,12,14]},{"term_id":"R-HSA-392499","term_label":"Metabolism of proteins","supporting_discovery_ids":[5,25,36]},{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[3,9,22]}],"complexes":[],"partners":["PCSK1","PCSK2","MC2R","MC1R","MC4R","PAM"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"P01189","full_name":"Pro-opiomelanocortin","aliases":["Corticotropin-lipotropin"],"length_aa":267,"mass_kda":29.4,"function":"Precursor protein of pituitary hormones that are involved in diverse physiological processes, including the regulation of energy balance, stress response, immune function and skin pigmentation Functions as a ligand for the melanocortin receptors MC1R, MC2R, MC3R and MC5R (PubMed:8396929, PubMed:8463333, PubMed:8636348). Activation of MC1R increases melanogenesis in melanocytes found in the skin and hair (PubMed:9620771). Binding to MC2R stimulates the adrenal glands to secrete cortisol (PubMed:8636348). Contributes to the regulation of energy homeostasis through activation of MC3R (Probable). Involved in the regulation exocrine gland function through MC5R activation (By similarity) Serves as a ligand for the melanocortin receptors MC1R, MC3R, MC4R and MC5R (PubMed:8392067, PubMed:8396929, PubMed:8463333). Activation of MC1R promotes melanogenesis in melanocytes of the skin and hair (PubMed:10403794, PubMed:9620771). Contributes to the regulation of energy homeostasis through activation of MC3R (Probable). Through MC4R activation, functions as an anorexigenic peptide (PubMed:8392067). Promotes immunosuppression and involved in the regulation exocrine gland function through MC5R activation (By similarity) Functions as a ligand for the melanocortin receptors MC1R, MC3R, MC4R and MC5R (PubMed:8396929, PubMed:8463333). Activation of MC1R increases melanogenesis in melanocytes found in the skin and hair (Probable). Contributes to the regulation of energy homeostasis through activation of MC3R (Probable). Through MC4R activation, functions as an anorexigenic peptide (PubMed:8392067). Involved in the regulation exocrine gland function through MC5R activation (By similarity) Functions as a ligand for the melanocortin receptors MC1R, MC3R, MC4R and MC5R (PubMed:8396929, PubMed:8463333). Activation of MC1R increases melanogenesis in melanocytes found in the skin and hair (Probable). Contributes to the regulation of energy homeostasis through activation of MC3R (Probable). Binds to MC4R with low potency (PubMed:8392067). Involved in the regulation exocrine gland function through MC5R activation (By similarity) Endogenous orexigenic opiate Endogenous opiate","subcellular_location":"Secreted","url":"https://www.uniprot.org/uniprotkb/P01189/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/POMC","classification":"Not Classified","n_dependent_lines":0,"n_total_lines":1208,"dependency_fraction":0.0},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/POMC","total_profiled":1310},"omim":[{"mim_id":"617869","title":"NK1 HOMEOBOX 1; NKX1-1","url":"https://www.omim.org/entry/617869"},{"mim_id":"616914","title":"MARFANOID-PROGEROID-LIPODYSTROPHY SYNDROME; MFLS","url":"https://www.omim.org/entry/616914"},{"mim_id":"615410","title":"MELANOCORTIN 2 RECEPTOR ACCESSORY PROTEIN 2; MRAP2","url":"https://www.omim.org/entry/615410"},{"mim_id":"614785","title":"MITOCHONDRIAL FISSION FACTOR; MFF","url":"https://www.omim.org/entry/614785"},{"mim_id":"613886","title":"OBESITY, HYPERPHAGIA, AND DEVELOPMENTAL DELAY; OBHD","url":"https://www.omim.org/entry/613886"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"","locations":[],"tissue_specificity":"Tissue enriched","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"pituitary gland","ntpm":30726.6}],"url":"https://www.proteinatlas.org/search/POMC"},"hgnc":{"alias_symbol":["MSH","POC","CLIP","ACTH","NPP","LPH"],"prev_symbol":[]},"alphafold":{"accession":"P01189","domains":[{"cath_id":"-","chopping":"10-55","consensus_level":"medium","plddt":74.5322,"start":10,"end":55}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/P01189","model_url":"https://alphafold.ebi.ac.uk/files/AF-P01189-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-P01189-F1-predicted_aligned_error_v6.png","plddt_mean":57.66},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=POMC","jax_strain_url":"https://www.jax.org/strain/search?query=POMC"},"sequence":{"accession":"P01189","fasta_url":"https://rest.uniprot.org/uniprotkb/P01189.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/P01189/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/P01189"}},"corpus_meta":[{"pmid":"11373681","id":"PMC_11373681","title":"Leptin activates anorexigenic POMC neurons through a neural network in the arcuate nucleus.","date":"2001","source":"Nature","url":"https://pubmed.ncbi.nlm.nih.gov/11373681","citation_count":1845,"is_preprint":false},{"pmid":"6323158","id":"PMC_6323158","title":"Corticosteroid inhibition of ACTH secretion.","date":"1984","source":"Endocrine reviews","url":"https://pubmed.ncbi.nlm.nih.gov/6323158","citation_count":1111,"is_preprint":false},{"pmid":"25707796","id":"PMC_25707796","title":"Hypothalamic POMC neurons promote cannabinoid-induced feeding.","date":"2015","source":"Nature","url":"https://pubmed.ncbi.nlm.nih.gov/25707796","citation_count":336,"is_preprint":false},{"pmid":"23146889","id":"PMC_23146889","title":"Leptin and insulin pathways in POMC and AgRP neurons that modulate energy balance and glucose homeostasis.","date":"2012","source":"EMBO reports","url":"https://pubmed.ncbi.nlm.nih.gov/23146889","citation_count":324,"is_preprint":false},{"pmid":"16125936","id":"PMC_16125936","title":"NPP-type ectophosphodiesterases: unity in diversity.","date":"2005","source":"Trends in biochemical sciences","url":"https://pubmed.ncbi.nlm.nih.gov/16125936","citation_count":311,"is_preprint":false},{"pmid":"6255341","id":"PMC_6255341","title":"Most of the coding region of rat ACTH beta--LPH precursor gene lacks intervening sequences.","date":"1980","source":"Nature","url":"https://pubmed.ncbi.nlm.nih.gov/6255341","citation_count":289,"is_preprint":false},{"pmid":"18394919","id":"PMC_18394919","title":"Dissociation of ACTH and glucocorticoids.","date":"2008","source":"Trends in endocrinology and metabolism: TEM","url":"https://pubmed.ncbi.nlm.nih.gov/18394919","citation_count":266,"is_preprint":false},{"pmid":"19770186","id":"PMC_19770186","title":"Hormone and glucose signalling in POMC and AgRP neurons.","date":"2009","source":"The Journal of physiology","url":"https://pubmed.ncbi.nlm.nih.gov/19770186","citation_count":198,"is_preprint":false},{"pmid":"30156493","id":"PMC_30156493","title":"POMC: The Physiological Power of Hormone Processing.","date":"2018","source":"Physiological reviews","url":"https://pubmed.ncbi.nlm.nih.gov/30156493","citation_count":184,"is_preprint":false},{"pmid":"20160350","id":"PMC_20160350","title":"PTP1B and SHP2 in POMC neurons reciprocally regulate energy balance in mice.","date":"2010","source":"The Journal of clinical investigation","url":"https://pubmed.ncbi.nlm.nih.gov/20160350","citation_count":170,"is_preprint":false},{"pmid":"204766","id":"PMC_204766","title":"Behavioral and electrophysiological effects of peptides related to lipotropin (beta-LPH).","date":"1978","source":"The Journal of pharmacology and experimental therapeutics","url":"https://pubmed.ncbi.nlm.nih.gov/204766","citation_count":140,"is_preprint":false},{"pmid":"20544290","id":"PMC_20544290","title":"The ectopic ACTH syndrome.","date":"2010","source":"Reviews in endocrine & metabolic disorders","url":"https://pubmed.ncbi.nlm.nih.gov/20544290","citation_count":138,"is_preprint":false},{"pmid":"34002087","id":"PMC_34002087","title":"Functionally distinct POMC-expressing neuron subpopulations in hypothalamus revealed by intersectional targeting.","date":"2021","source":"Nature neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/34002087","citation_count":132,"is_preprint":false},{"pmid":"18209859","id":"PMC_18209859","title":"Ectopic ACTH syndrome.","date":"2007","source":"Arquivos brasileiros de endocrinologia e metabologia","url":"https://pubmed.ncbi.nlm.nih.gov/18209859","citation_count":120,"is_preprint":false},{"pmid":"15833364","id":"PMC_15833364","title":"CRH stimulates POMC activity and corticosterone production in dermal fibroblasts.","date":"2005","source":"Journal of neuroimmunology","url":"https://pubmed.ncbi.nlm.nih.gov/15833364","citation_count":116,"is_preprint":false},{"pmid":"10652501","id":"PMC_10652501","title":"Implications of proopiomelanocortin (POMC) mutations in humans: the POMC deficiency syndrome.","date":"2000","source":"Trends in endocrinology and metabolism: TEM","url":"https://pubmed.ncbi.nlm.nih.gov/10652501","citation_count":110,"is_preprint":false},{"pmid":"18234336","id":"PMC_18234336","title":"Effects of non-human species irradiation after the Chernobyl NPP accident.","date":"2008","source":"Environment international","url":"https://pubmed.ncbi.nlm.nih.gov/18234336","citation_count":102,"is_preprint":false},{"pmid":"30230471","id":"PMC_30230471","title":"Insulin regulates POMC neuronal plasticity to control glucose metabolism.","date":"2018","source":"eLife","url":"https://pubmed.ncbi.nlm.nih.gov/30230471","citation_count":101,"is_preprint":false},{"pmid":"28489068","id":"PMC_28489068","title":"TNFα drives mitochondrial stress in POMC neurons in obesity.","date":"2017","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/28489068","citation_count":100,"is_preprint":false},{"pmid":"16681590","id":"PMC_16681590","title":"Proopiomelanocortin (POMC): the cutaneous roles of its melanocortin products and receptors.","date":"2006","source":"Clinical and experimental dermatology","url":"https://pubmed.ncbi.nlm.nih.gov/16681590","citation_count":98,"is_preprint":false},{"pmid":"21388402","id":"PMC_21388402","title":"Evolution of POMC: origin, phylogeny, posttranslational processing, and the melanocortins.","date":"2011","source":"Annals of the New York Academy of Sciences","url":"https://pubmed.ncbi.nlm.nih.gov/21388402","citation_count":97,"is_preprint":false},{"pmid":"24506071","id":"PMC_24506071","title":"Early-life stress reduces DNA methylation of the Pomc gene in male mice.","date":"2014","source":"Endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/24506071","citation_count":97,"is_preprint":false},{"pmid":"12376393","id":"PMC_12376393","title":"Hypothalamic NPY, AGRP, and POMC mRNA responses to leptin and refeeding in mice.","date":"2002","source":"American journal of physiology. Regulatory, integrative and comparative physiology","url":"https://pubmed.ncbi.nlm.nih.gov/12376393","citation_count":94,"is_preprint":false},{"pmid":"27533078","id":"PMC_27533078","title":"Hypothalamic AMPK-induced autophagy increases food intake by regulating NPY and POMC expression.","date":"2016","source":"Autophagy","url":"https://pubmed.ncbi.nlm.nih.gov/27533078","citation_count":92,"is_preprint":false},{"pmid":"11511529","id":"PMC_11511529","title":"In situ expression of corticotropin-releasing hormone (CRH) and proopiomelanocortin (POMC) genes in human skin.","date":"2001","source":"FASEB journal : official publication of the Federation of American Societies for Experimental Biology","url":"https://pubmed.ncbi.nlm.nih.gov/11511529","citation_count":91,"is_preprint":false},{"pmid":"28099839","id":"PMC_28099839","title":"TrpC5 Mediates Acute Leptin and Serotonin Effects via Pomc Neurons.","date":"2017","source":"Cell reports","url":"https://pubmed.ncbi.nlm.nih.gov/28099839","citation_count":87,"is_preprint":false},{"pmid":"8137518","id":"PMC_8137518","title":"ACTH precursors characterize the ectopic ACTH syndrome.","date":"1994","source":"Clinical endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/8137518","citation_count":87,"is_preprint":false},{"pmid":"28190775","id":"PMC_28190775","title":"DRP1 Suppresses Leptin and Glucose Sensing of POMC Neurons.","date":"2017","source":"Cell metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/28190775","citation_count":79,"is_preprint":false},{"pmid":"29457782","id":"PMC_29457782","title":"Hypothalamic ER-associated degradation regulates POMC maturation, feeding, and age-associated obesity.","date":"2018","source":"The Journal of clinical investigation","url":"https://pubmed.ncbi.nlm.nih.gov/29457782","citation_count":79,"is_preprint":false},{"pmid":"33535098","id":"PMC_33535098","title":"Mitohormesis in Hypothalamic POMC Neurons Mediates Regular Exercise-Induced High-Turnover Metabolism.","date":"2021","source":"Cell metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/33535098","citation_count":74,"is_preprint":false},{"pmid":"30292523","id":"PMC_30292523","title":"Cellular and synaptic reorganization of arcuate NPY/AgRP and POMC neurons after exercise.","date":"2018","source":"Molecular metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/30292523","citation_count":74,"is_preprint":false},{"pmid":"25855171","id":"PMC_25855171","title":"Fertility-regulating Kiss1 neurons arise from hypothalamic POMC-expressing progenitors.","date":"2015","source":"The Journal of neuroscience : the official journal of the Society for Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/25855171","citation_count":74,"is_preprint":false},{"pmid":"26793988","id":"PMC_26793988","title":"60 YEARS OF POMC: Adrenal and extra-adrenal functions of ACTH.","date":"2016","source":"Journal of molecular endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/26793988","citation_count":72,"is_preprint":false},{"pmid":"26667899","id":"PMC_26667899","title":"60 YEARS OF POMC: From POMC and α-MSH to PAM, molecular oxygen, copper, and vitamin C.","date":"2015","source":"Journal of molecular endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/26667899","citation_count":71,"is_preprint":false},{"pmid":"20191296","id":"PMC_20191296","title":"DNA methylation of the POMC gene promoter is associated with craving in alcohol dependence.","date":"2010","source":"Journal of neural transmission (Vienna, Austria : 1996)","url":"https://pubmed.ncbi.nlm.nih.gov/20191296","citation_count":68,"is_preprint":false},{"pmid":"22829581","id":"PMC_22829581","title":"GLP-2 receptor in POMC neurons suppresses feeding behavior and gastric motility.","date":"2012","source":"American journal of physiology. Endocrinology and metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/22829581","citation_count":67,"is_preprint":false},{"pmid":"12368289","id":"PMC_12368289","title":"An ACTH- and ATP-regulated background K+ channel in adrenocortical cells is TREK-1.","date":"2002","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/12368289","citation_count":67,"is_preprint":false},{"pmid":"12768537","id":"PMC_12768537","title":"Adrenocortical zonation and ACTH.","date":"2003","source":"Microscopy research and technique","url":"https://pubmed.ncbi.nlm.nih.gov/12768537","citation_count":66,"is_preprint":false},{"pmid":"6253815","id":"PMC_6253815","title":"The protein-coding sequence of the bovine ACTH-beta-LPH precursor gene is split near the signal peptide region.","date":"1980","source":"Nature","url":"https://pubmed.ncbi.nlm.nih.gov/6253815","citation_count":62,"is_preprint":false},{"pmid":"25872650","id":"PMC_25872650","title":"Pro-Opiomelanocortin (POMC) Neurones, POMC-Derived Peptides, Melanocortin Receptors and Obesity: How Understanding of this System has Changed Over the Last Decade.","date":"2015","source":"Journal of neuroendocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/25872650","citation_count":59,"is_preprint":false},{"pmid":"29467172","id":"PMC_29467172","title":"Amylin Selectively Signals Onto POMC Neurons in the Arcuate Nucleus of the Hypothalamus.","date":"2018","source":"Diabetes","url":"https://pubmed.ncbi.nlm.nih.gov/29467172","citation_count":59,"is_preprint":false},{"pmid":"20103739","id":"PMC_20103739","title":"PDK-1/FoxO1 pathway in POMC neurons regulates Pomc expression and food intake.","date":"2010","source":"American journal of physiology. Endocrinology and metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/20103739","citation_count":58,"is_preprint":false},{"pmid":"26792827","id":"PMC_26792827","title":"60 YEARS OF POMC: Melanocortin receptors: evolution of ligand selectivity for melanocortin peptides.","date":"2016","source":"Journal of molecular endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/26792827","citation_count":57,"is_preprint":false},{"pmid":"10698592","id":"PMC_10698592","title":"ACTH resistance syndromes.","date":"1999","source":"Journal of pediatric endocrinology & metabolism : JPEM","url":"https://pubmed.ncbi.nlm.nih.gov/10698592","citation_count":56,"is_preprint":false},{"pmid":"7626446","id":"PMC_7626446","title":"Ectopic ACTH syndrome.","date":"1995","source":"The Journal of steroid biochemistry and molecular biology","url":"https://pubmed.ncbi.nlm.nih.gov/7626446","citation_count":55,"is_preprint":false},{"pmid":"191221","id":"PMC_191221","title":"Lung tumours and ACTH production.","date":"1977","source":"Clinical endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/191221","citation_count":55,"is_preprint":false},{"pmid":"16271481","id":"PMC_16271481","title":"Inherited ACTH insensitivity illuminates the mechanisms of ACTH action.","date":"2005","source":"Trends in endocrinology and metabolism: TEM","url":"https://pubmed.ncbi.nlm.nih.gov/16271481","citation_count":54,"is_preprint":false},{"pmid":"31344387","id":"PMC_31344387","title":"Epigenetic regulation of POMC; implications for nutritional programming, obesity and metabolic disease.","date":"2019","source":"Frontiers in neuroendocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/31344387","citation_count":53,"is_preprint":false},{"pmid":"31127052","id":"PMC_31127052","title":"The BBSome in POMC and AgRP Neurons Is Necessary for Body Weight Regulation and Sorting of Metabolic Receptors.","date":"2019","source":"Diabetes","url":"https://pubmed.ncbi.nlm.nih.gov/31127052","citation_count":53,"is_preprint":false},{"pmid":"22249810","id":"PMC_22249810","title":"The neuroendocrine circuitry controlled by POMC, MSH, and AGRP.","date":"2012","source":"Handbook of experimental pharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/22249810","citation_count":52,"is_preprint":false},{"pmid":"10816666","id":"PMC_10816666","title":"The skin POMC system (SPS). Leads and lessons from the hair follicle.","date":"1999","source":"Annals of the New York Academy of Sciences","url":"https://pubmed.ncbi.nlm.nih.gov/10816666","citation_count":52,"is_preprint":false},{"pmid":"35528826","id":"PMC_35528826","title":"Natural History of Obesity Due to POMC, PCSK1, and LEPR Deficiency and the Impact of Setmelanotide.","date":"2022","source":"Journal of the Endocrine Society","url":"https://pubmed.ncbi.nlm.nih.gov/35528826","citation_count":48,"is_preprint":false},{"pmid":"11151766","id":"PMC_11151766","title":"Linkage and association studies between the proopiomelanocortin (POMC) gene and obesity in caucasian families.","date":"2000","source":"Diabetologia","url":"https://pubmed.ncbi.nlm.nih.gov/11151766","citation_count":43,"is_preprint":false},{"pmid":"2698828","id":"PMC_2698828","title":"Tissue-specific activity of the pro-opiomelanocortin (POMC) gene and repression by glucocorticoids.","date":"1989","source":"Genome","url":"https://pubmed.ncbi.nlm.nih.gov/2698828","citation_count":41,"is_preprint":false},{"pmid":"34644574","id":"PMC_34644574","title":"Functional heterogeneity of POMC neurons relies on mTORC1 signaling.","date":"2021","source":"Cell reports","url":"https://pubmed.ncbi.nlm.nih.gov/34644574","citation_count":41,"is_preprint":false},{"pmid":"28028078","id":"PMC_28028078","title":"Ire1α in Pomc Neurons Is Required for Thermogenesis and Glycemia.","date":"2016","source":"Diabetes","url":"https://pubmed.ncbi.nlm.nih.gov/28028078","citation_count":41,"is_preprint":false},{"pmid":"6254699","id":"PMC_6254699","title":"Secretion of ACTH, LPH and beta-endophin from human pituitary tumours in vitro.","date":"1980","source":"Clinical endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/6254699","citation_count":40,"is_preprint":false},{"pmid":"19146848","id":"PMC_19146848","title":"Early embryonic requirement for nucleoporin Nup35/NPP-19 in nuclear assembly.","date":"2008","source":"Developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/19146848","citation_count":40,"is_preprint":false},{"pmid":"23293326","id":"PMC_23293326","title":"Bioinactive ACTH causing glucocorticoid deficiency.","date":"2013","source":"The Journal of clinical endocrinology and metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/23293326","citation_count":39,"is_preprint":false},{"pmid":"21860632","id":"PMC_21860632","title":"Early onset obesity and adrenal insufficiency associated with a homozygous POMC mutation.","date":"2011","source":"International journal of pediatric endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/21860632","citation_count":39,"is_preprint":false},{"pmid":"10858267","id":"PMC_10858267","title":"Spatiotemporal expression, distribution, and processing of POMC and POMC-derived peptides in murine skin.","date":"2000","source":"The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society","url":"https://pubmed.ncbi.nlm.nih.gov/10858267","citation_count":39,"is_preprint":false},{"pmid":"34737351","id":"PMC_34737351","title":"Lactate activates hypothalamic POMC neurons by intercellular signaling.","date":"2021","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/34737351","citation_count":36,"is_preprint":false},{"pmid":"17161331","id":"PMC_17161331","title":"The genetics of ACTH resistance syndromes.","date":"2006","source":"Best practice & research. Clinical endocrinology & metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/17161331","citation_count":35,"is_preprint":false},{"pmid":"31530579","id":"PMC_31530579","title":"MCH Regulates SIRT1/FoxO1 and Reduces POMC Neuronal Activity to Induce Hyperphagia, Adiposity, and Glucose Intolerance.","date":"2019","source":"Diabetes","url":"https://pubmed.ncbi.nlm.nih.gov/31530579","citation_count":35,"is_preprint":false},{"pmid":"27500489","id":"PMC_27500489","title":"Disruption of Gpr45 causes reduced hypothalamic POMC expression and obesity.","date":"2016","source":"The Journal of clinical investigation","url":"https://pubmed.ncbi.nlm.nih.gov/27500489","citation_count":34,"is_preprint":false},{"pmid":"4359333","id":"PMC_4359333","title":"ACTH antagonists.","date":"1974","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/4359333","citation_count":34,"is_preprint":false},{"pmid":"24134870","id":"PMC_24134870","title":"Cellular insulin resistance disrupts hypothalamic mHypoA-POMC/GFP neuronal signaling pathways.","date":"2013","source":"The Journal of endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/24134870","citation_count":34,"is_preprint":false},{"pmid":"25013995","id":"PMC_25013995","title":"Clinical utility of plasma POMC and AgRP measurements in the differential diagnosis of ACTH-dependent Cushing's syndrome.","date":"2014","source":"The Journal of clinical endocrinology and metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/25013995","citation_count":33,"is_preprint":false},{"pmid":"16274846","id":"PMC_16274846","title":"Circumventing central leptin resistance: lessons from central leptin and POMC gene delivery.","date":"2005","source":"Peptides","url":"https://pubmed.ncbi.nlm.nih.gov/16274846","citation_count":32,"is_preprint":false},{"pmid":"16325795","id":"PMC_16325795","title":"Nucleoporins NPP-1, NPP-3, NPP-4, NPP-11 and NPP-13 are required for proper spindle orientation in C. elegans.","date":"2005","source":"Developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/16325795","citation_count":31,"is_preprint":false},{"pmid":"27547198","id":"PMC_27547198","title":"ACTH Antagonists.","date":"2016","source":"Frontiers in endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/27547198","citation_count":30,"is_preprint":false},{"pmid":"30390283","id":"PMC_30390283","title":"POMC Neurons: Feeding, Energy Metabolism, and Beyond.","date":"2018","source":"Advances in experimental medicine and biology","url":"https://pubmed.ncbi.nlm.nih.gov/30390283","citation_count":30,"is_preprint":false},{"pmid":"27935805","id":"PMC_27935805","title":"E2F1-mediated human POMC expression in ectopic Cushing's syndrome.","date":"2016","source":"Endocrine-related cancer","url":"https://pubmed.ncbi.nlm.nih.gov/27935805","citation_count":29,"is_preprint":false},{"pmid":"29321171","id":"PMC_29321171","title":"SGK1/FOXO3 Signaling in Hypothalamic POMC Neurons Mediates Glucocorticoid-Increased Adiposity.","date":"2018","source":"Diabetes","url":"https://pubmed.ncbi.nlm.nih.gov/29321171","citation_count":29,"is_preprint":false},{"pmid":"24204898","id":"PMC_24204898","title":"Somato-dendritic localization and signaling by leptin receptors in hypothalamic POMC and AgRP neurons.","date":"2013","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/24204898","citation_count":28,"is_preprint":false},{"pmid":"10885325","id":"PMC_10885325","title":"Pro-opiomelanocortin (POMC) deficiency and peripheral melanocortins in obesity.","date":"2000","source":"Nutrition reviews","url":"https://pubmed.ncbi.nlm.nih.gov/10885325","citation_count":27,"is_preprint":false},{"pmid":"38643150","id":"PMC_38643150","title":"AZGP1 in POMC neurons modulates energy homeostasis and metabolism through leptin-mediated STAT3 phosphorylation.","date":"2024","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/38643150","citation_count":26,"is_preprint":false},{"pmid":"23392095","id":"PMC_23392095","title":"ACTH resistance: genes and mechanisms.","date":"2013","source":"Endocrine development","url":"https://pubmed.ncbi.nlm.nih.gov/23392095","citation_count":25,"is_preprint":false},{"pmid":"26671895","id":"PMC_26671895","title":"60 YEARS OF POMC: POMC: an evolutionary perspective.","date":"2015","source":"Journal of molecular endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/26671895","citation_count":25,"is_preprint":false},{"pmid":"8734450","id":"PMC_8734450","title":"The ACTH receptor.","date":"1996","source":"Bailliere's clinical endocrinology and metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/8734450","citation_count":24,"is_preprint":false},{"pmid":"33250721","id":"PMC_33250721","title":"Activation of the ARCPOMC→MeA Projection Reduces Food Intake.","date":"2020","source":"Frontiers in neural circuits","url":"https://pubmed.ncbi.nlm.nih.gov/33250721","citation_count":24,"is_preprint":false},{"pmid":"26643913","id":"PMC_26643913","title":"60 YEARS OF POMC: The proopiomelanocortin gene: discovery, deletion and disease.","date":"2015","source":"Journal of molecular endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/26643913","citation_count":23,"is_preprint":false},{"pmid":"27999527","id":"PMC_27999527","title":"ACTH Action on StAR Biology.","date":"2016","source":"Frontiers in neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/27999527","citation_count":23,"is_preprint":false},{"pmid":"33462216","id":"PMC_33462216","title":"Loss of POMC-mediated antinociception contributes to painful diabetic neuropathy.","date":"2021","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/33462216","citation_count":23,"is_preprint":false},{"pmid":"8556053","id":"PMC_8556053","title":"Adrenocorticotropic hormone (ACTH) increases the expression of its own receptor gene.","date":"1995","source":"Endocrine journal","url":"https://pubmed.ncbi.nlm.nih.gov/8556053","citation_count":23,"is_preprint":false},{"pmid":"32244188","id":"PMC_32244188","title":"Hypothalamic POMC deficiency increases circulating adiponectin despite obesity.","date":"2020","source":"Molecular metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/32244188","citation_count":22,"is_preprint":false},{"pmid":"19036902","id":"PMC_19036902","title":"Liver X receptor-alpha regulates proopiomelanocortin (POMC) gene transcription in the pituitary.","date":"2008","source":"Molecular endocrinology (Baltimore, Md.)","url":"https://pubmed.ncbi.nlm.nih.gov/19036902","citation_count":22,"is_preprint":false},{"pmid":"34395386","id":"PMC_34395386","title":"The Impact of Recent Developments in Electrochemical POC Sensor for Blood Sugar Care.","date":"2021","source":"Frontiers in chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/34395386","citation_count":22,"is_preprint":false},{"pmid":"30957016","id":"PMC_30957016","title":"Selective Restoration of Pomc Expression in Glutamatergic POMC Neurons: Evidence for a Dynamic Hypothalamic Neurotransmitter Network.","date":"2019","source":"eNeuro","url":"https://pubmed.ncbi.nlm.nih.gov/30957016","citation_count":21,"is_preprint":false},{"pmid":"36387867","id":"PMC_36387867","title":"Involvement of POMC neurons in LEAP2 regulation of food intake and body weight.","date":"2022","source":"Frontiers in endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/36387867","citation_count":21,"is_preprint":false},{"pmid":"26714014","id":"PMC_26714014","title":"Effects of RXR Agonists on Cell Proliferation/Apoptosis and ACTH Secretion/Pomc Expression.","date":"2015","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/26714014","citation_count":20,"is_preprint":false},{"pmid":"34207679","id":"PMC_34207679","title":"Hypothalamic Expression of Neuropeptide Y (NPY) and Pro-OpioMelanoCortin (POMC) in Adult Male Mice Is Affected by Chronic Exposure to Endocrine Disruptors.","date":"2021","source":"Metabolites","url":"https://pubmed.ncbi.nlm.nih.gov/34207679","citation_count":20,"is_preprint":false},{"pmid":"34031163","id":"PMC_34031163","title":"Barbadin Potentiates Long-Term Effects of Lorcaserin on POMC Neurons and Weight Loss.","date":"2021","source":"The Journal of neuroscience : the official journal of the Society for Neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/34031163","citation_count":19,"is_preprint":false},{"pmid":"15885775","id":"PMC_15885775","title":"Expression of AgRP, NPY, POMC and CART in human fetal and adult hippocampus.","date":"2005","source":"Neuropeptides","url":"https://pubmed.ncbi.nlm.nih.gov/15885775","citation_count":19,"is_preprint":false},{"pmid":"28406939","id":"PMC_28406939","title":"Role of NeuroD1 on the negative regulation of Pomc expression by glucocorticoid.","date":"2017","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/28406939","citation_count":19,"is_preprint":false},{"pmid":"12768538","id":"PMC_12768538","title":"ACTH and adrenocortical gap junctions.","date":"2003","source":"Microscopy research and technique","url":"https://pubmed.ncbi.nlm.nih.gov/12768538","citation_count":18,"is_preprint":false},{"pmid":"30503832","id":"PMC_30503832","title":"Hypothalamic POMC or MC4R deficiency impairs counterregulatory responses to hypoglycemia in mice.","date":"2018","source":"Molecular metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/30503832","citation_count":18,"is_preprint":false},{"pmid":"8897892","id":"PMC_8897892","title":"Regulation of sucrase and lactase in Caco-2 cells: relationship to nuclear factors SIF-1 and NF-LPH-1.","date":"1996","source":"The American journal of physiology","url":"https://pubmed.ncbi.nlm.nih.gov/8897892","citation_count":18,"is_preprint":false},{"pmid":"37092539","id":"PMC_37092539","title":"Heterozygous pathogenic variants in POMC are not responsible for monogenic obesity: Implication for MC4R agonist use.","date":"2023","source":"Genetics in medicine : official journal of the American College of Medical Genetics","url":"https://pubmed.ncbi.nlm.nih.gov/37092539","citation_count":17,"is_preprint":false},{"pmid":"39578459","id":"PMC_39578459","title":"Histone lactylation mediated by Fam172a in POMC neurons regulates energy balance.","date":"2024","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/39578459","citation_count":16,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":47606,"output_tokens":9711,"usd":0.144241,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":20299,"output_tokens":6189,"usd":0.12811,"stage2_stop_reason":"end_turn"},"total_usd":0.272351,"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\": 1980,\n      \"finding\": \"The bovine POMC (ACTH-β-LPH precursor) gene contains a single intron of ~2.2 kb that separates a small exon encoding the signal peptide from a large exon encoding most of the protein structure, including all known biologically active component peptides (ACTH, β-endorphin, MSH sequences).\",\n      \"method\": \"Genomic DNA cloning, restriction mapping, and nucleotide sequencing of bovine genomic DNA fragments\",\n      \"journal\": \"Nature\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — direct sequencing of genomic DNA with clear structural determination, foundational result replicated by multiple subsequent studies\",\n      \"pmids\": [\"6253815\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1980,\n      \"finding\": \"The rat POMC gene coding region (from amino acid 19 to the poly-A site, encompassing all biologically active peptides including γ-MSH, ACTH, β-endorphin) contains no intervening sequences; the DNA encoding the putative γ-MSH and preceding sequence is highly conserved between rat and cow.\",\n      \"method\": \"Rat genomic DNA library cloning and DNA sequencing\",\n      \"journal\": \"Nature\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — direct sequencing of genomic DNA, confirmed and extended by Nakanishi et al. independently\",\n      \"pmids\": [\"6255341\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1984,\n      \"finding\": \"Glucocorticoid feedback inhibits ACTH secretion via three temporally distinct mechanisms: (1) fast feedback at the cell membrane inhibiting stimulus-secretion coupling without requiring protein synthesis; (2) intermediate feedback requiring synthesis of a corticosteroid-dependent protein that reduces stimulated ACTH release; (3) slow feedback via the classical genomic mechanism reducing pituitary POMC mRNA levels and thereby decreasing ACTH content and basal secretion.\",\n      \"method\": \"In vitro corticotrope secretion assays, in vivo pharmacology, analysis of POMC mRNA levels\",\n      \"journal\": \"Endocrine reviews\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal in vitro and in vivo experimental approaches across many studies summarized; review paper but based on primary experimental evidence\",\n      \"pmids\": [\"6323158\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1989,\n      \"finding\": \"A 543-bp fragment in the 5'-flanking region of the POMC gene is sufficient for cell-specific pituitary expression and contains a negative glucocorticoid response element (nGRE) in the proximal promoter that binds both the glucocorticoid receptor and COUP-family transcription factors in a mutually exclusive manner, mediating glucocorticoid repression of POMC transcription.\",\n      \"method\": \"DNA-mediated gene transfer into transgenic mice and tissue culture cells, DNA-binding assays with nuclear proteins\",\n      \"journal\": \"Genome\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — reconstitution in transgenic mice combined with cell culture transfection and DNA-protein binding assays; two orthogonal systems\",\n      \"pmids\": [\"2698828\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1994,\n      \"finding\": \"Ectopic ACTH syndrome is characterized by aberrant processing of POMC such that ACTH precursors (pro-ACTH/POMC) rather than fully processed ACTH are the predominant circulating forms; chromatographic analysis confirmed ACTH precursors as the major immunoreactive species, with ACTH precursor levels correlating with cortisol whereas ACTH itself did not.\",\n      \"method\": \"Specific monoclonal-based immunoradiometric assays for ACTH and ACTH precursors, plasma chromatography under acid-dissociating conditions\",\n      \"journal\": \"Clinical endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — specific IRMA assays plus chromatographic biochemical characterization in patient cohort; two orthogonal methods\",\n      \"pmids\": [\"8137518\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"Spatiotemporal expression of POMC mRNA and processing of POMC-derived peptides (β-endorphin, ACTH, β-MSH, α-MSH) in murine skin is cell-specific and depends on the differential expression of prohormone convertases PC1 and PC2, which are present in the same cells as POMC peptides; PC1 and PC2 activities drive cell-specific differential POMC processing in the skin.\",\n      \"method\": \"In situ hybridization histochemistry and immunohistochemistry in anagen hair follicle murine skin\",\n      \"journal\": \"The journal of histochemistry and cytochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-localization of convertases and peptide products by two orthogonal histological methods; single lab\",\n      \"pmids\": [\"10858267\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"Leptin increases action potential frequency in hypothalamic POMC neurons by two mechanisms: direct depolarization through a nonspecific cation channel, and reduced inhibitory input from local orexigenic NPY/GABA neurons. Additionally, melanocortin peptides exert an autoinhibitory effect on this circuit.\",\n      \"method\": \"Electrophysiological recordings (patch-clamp) on GFP-tagged POMC neurons in transgenic mice\",\n      \"journal\": \"Nature\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — direct electrophysiology with cell-type identification in transgenic mice, two distinct mechanisms identified with pharmacological dissection\",\n      \"pmids\": [\"11373681\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"Human skin keratinocytes and dermal fibroblasts locally express both CRH and POMC mRNA (co-expressed in the same cells), demonstrated by in situ RT-PCR combined with laser-capture microdissection, indicating local POMC production rather than uptake from the CNS.\",\n      \"method\": \"In situ reverse-transcription PCR, immunohistochemistry, laser-capture microdissection combined with RT-PCR\",\n      \"journal\": \"FASEB journal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — three orthogonal methods (in situ RT-PCR, IHC, LCM+RT-PCR) in single lab confirming local expression\",\n      \"pmids\": [\"11511529\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"CRH stimulates POMC gene and protein expression, ACTH production and release, and corticosterone production in human dermal fibroblasts (but not keratinocytes) via cAMP signaling, establishing a functional CRH-POMC-corticosteroid axis in fibroblasts analogous to the HPA axis.\",\n      \"method\": \"cAMP assay, POMC gene/protein expression, ACTH ELISA, corticosterone measurement in fibroblast and keratinocyte cell cultures treated with CRH and ACTH\",\n      \"journal\": \"Journal of neuroimmunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple biochemical readouts (cAMP, mRNA, protein, hormone secretion) in cell culture; single lab\",\n      \"pmids\": [\"15833364\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"LXR-α positively regulates POMC gene transcription in pituitary by binding as a RXR-α/LXR-α heterodimer to a region between -73 and -52 bp in the rat POMC promoter; LXR agonist treatment increased POMC mRNA, ACTH content, and plasma ACTH/corticosterone, and siRNA knockdown of LXR-α abolished promoter activation.\",\n      \"method\": \"EMSA, ChIP, luciferase reporter assays, siRNA knockdown, in vivo LXR agonist treatment with ACTH/corticosterone measurement\",\n      \"journal\": \"Molecular endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — multiple orthogonal methods including EMSA, ChIP, reporter assay, and siRNA rescue; single lab but 4 different assays\",\n      \"pmids\": [\"19036902\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"PTP1B and SHP2 in POMC neurons reciprocally regulate energy balance: POMC-specific PTP1B deletion improves leptin sensitivity and glucose homeostasis, while POMC-specific SHP2 deletion impairs leptin sensitivity and markedly reduces hypothalamic POMC mRNA and α-MSH peptide levels, implicating SHP2 in normal melanocortin system function.\",\n      \"method\": \"Cre-LoxP conditional knockout mice, measurement of adiposity, leptin sensitivity, energy expenditure, POMC mRNA, α-MSH peptide levels, and hyperinsulinemic-euglycemic clamp\",\n      \"journal\": \"The Journal of clinical investigation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean neuron-specific genetic KO with multiple orthogonal metabolic and molecular phenotypic readouts in vivo\",\n      \"pmids\": [\"20160350\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"PDK-1 and FoxO1 signaling in POMC neurons regulate POMC gene transcription and food intake: POMC-neuron-specific PDK-1 knockout decreases Pomc gene expression and increases food intake/body weight; constitutively nuclear FoxO1 in POMC neurons further suppresses Pomc expression in PDK-1 KO mice, while transactivation-defective FoxO1 has no effect.\",\n      \"method\": \"POMC neuron-specific Pdk1 knockout mice; transgenic mice expressing constitutively nuclear or transactivation-defective FoxO1 in POMC neurons; food intake, body weight, and Pomc mRNA measurement\",\n      \"journal\": \"American journal of physiology. Endocrinology and metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — neuron-specific genetic epistasis using multiple transgenic lines with molecular (mRNA) and physiological readouts\",\n      \"pmids\": [\"20103739\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"POMC mutation p.R8C causes bioinactive ACTH and α-MSH: ACTH-R8C is immunoreactive but fails to bind and activate cAMP production in MC2R-expressing cells, and α-MSH-R8C fails to bind and stimulate cAMP in MC1R- and MC4R-expressing cells, demonstrating that residue R8 (within the HFRW motif) is essential for receptor binding and activation.\",\n      \"method\": \"Whole exome sequencing, Sanger sequencing, peptide synthesis, ACTH immunoradiometric assay, hormone binding assays, cAMP activation assays in cells expressing MC1R, MC2R, or MC4R\",\n      \"journal\": \"The Journal of clinical endocrinology and metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro reconstitution with synthetic mutant peptides, binding and functional cAMP assays in multiple receptor-expressing cell lines; natural human experiment with genetic confirmation\",\n      \"pmids\": [\"23293326\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Early-life stress reduces DNA methylation at a critical regulatory region of the Pomc promoter in pituitary, increasing Pomc mRNA; site-specific CpG methylation of the Pomc promoter represses Pomc mRNA transcription, and methyl-CpG binding protein-2 (MeCP2) binds the distal Pomc promoter in association with HDAC2 and DNMT1 to mediate this repression.\",\n      \"method\": \"Bisulfite sequencing, promoter methylation analysis, AtT20 pituitary cell transfection, ChIP for MeCP2/HDAC2/DNMT1 at the Pomc promoter\",\n      \"journal\": \"Endocrinology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — bisulfite sequencing plus ChIP in cell line; two orthogonal methods but single lab\",\n      \"pmids\": [\"24506071\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"CB1R activation selectively increases β-endorphin but not α-MSH release from hypothalamic POMC neurons; this β-endorphin release mediates CB1R-induced feeding because the opioid receptor antagonist naloxone (systemic or hypothalamic) blocks CB1R-induced hyperphagia. DREADD-mediated inhibition of POMC neurons diminishes, while activation enhances, CB1R-driven feeding.\",\n      \"method\": \"DREADD chemogenetics, hypothalamic β-endorphin and α-MSH measurement, naloxone pharmacology, mitochondrial functional assays in mice\",\n      \"journal\": \"Nature\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — chemogenetic circuit manipulation, peptide-specific release measurement, and pharmacological rescue with multiple orthogonal approaches\",\n      \"pmids\": [\"25707796\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"POMC-expressing progenitors in the hypothalamus give rise not only to POMC and AgRP neurons but also to Kiss1 neurons critical for puberty and reproductive function, establishing a developmental link between nutrient-sensing and reproductive neuroendocrine populations.\",\n      \"method\": \"Embryonic and adult ribosome-tagging Cre/loxP lineage tracing in mice\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic lineage tracing with two complementary recombinase strategies; single lab\",\n      \"pmids\": [\"25855171\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"GPR45 regulates POMC expression via the JAK/STAT signaling pathway in a cell-autonomous manner; disruption of Gpr45 reduces POMC expression and energy expenditure, and these effects are rescued by intraventricular melanocortin agonist (melanotan-2).\",\n      \"method\": \"Piggyback insertional mutagenesis screen, Gpr45 knockout mice, POMC mRNA measurement, JAK/STAT pathway analysis, intracerebroventricular drug rescue\",\n      \"journal\": \"The Journal of clinical investigation\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — KO phenotype with pathway identification by cell-autonomous assays and pharmacological rescue; single lab\",\n      \"pmids\": [\"27500489\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"IRE1α in POMC neurons is required for normal energy expenditure, thermogenesis, and glucose homeostasis; its loss elevates ER stress in POMC neurons and predisposes them to leptin and insulin resistance.\",\n      \"method\": \"POMC neuron-specific Ire1α conditional knockout mice, metabolic phenotyping (energy expenditure, thermogenesis, glucose tolerance, insulin tolerance), ER stress marker measurement\",\n      \"journal\": \"Diabetes\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — neuron-specific genetic KO with multiple metabolic readouts; single lab\",\n      \"pmids\": [\"28028078\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"E2F1 mediates ectopic POMC transcription in non-pituitary tumor cells independently of the pituitary-specific Tpit/Pitx1 factors; an E2F1 cluster binds the proximal hPOMC promoter (-42 to +68), with DNA-binding activity regulated by phosphorylation at Ser-337; E2F1/DP1 co-expression upregulates hPOMC mRNA up to 40-fold, and E2F1 inhibitors suppress ACTH in ectopic Cushing's cell lines and xenograft models.\",\n      \"method\": \"Promoter luciferase assays, ChIP, site-directed mutagenesis of E2F1 Ser-337, siRNA knockdown, xenograft mouse model with ACTH/cortisol measurement\",\n      \"journal\": \"Endocrine-related cancer\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — multiple orthogonal methods (ChIP, reporter assay, mutagenesis, in vivo xenograft) establishing mechanism; single lab\",\n      \"pmids\": [\"27935805\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"TrpC5 channel subunits in POMC neurons are required for the acute anorexigenic electrophysiological and behavioral responses to leptin and serotonin 2C receptor (Ht2Cr) agonists; POMC-specific Trpc5 deletion blunts depolarization of POMC neurons by both stimuli and abolishes their anorectic effects.\",\n      \"method\": \"POMC neuron-specific and pan-neuronal Trpc5 conditional knockout mice, electrophysiology (patch-clamp), food intake measurement, glucose/insulin tolerance tests\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — neuron-specific KO with electrophysiological (cellular) and behavioral (whole-organism) orthogonal readouts confirming channel as molecular mediator\",\n      \"pmids\": [\"28099839\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"DRP1-mediated mitochondrial fission in POMC neurons suppresses their leptin sensitivity and glucose responsiveness; inducible deletion of DRP1 in POMC neurons increases mitochondrial size, ROS production, and neuronal activation via increased Kcnj11 (KATP channel) mRNA regulated by PPAR, improving leptin sensitivity and glucoprivic responses.\",\n      \"method\": \"Inducible POMC neuron-specific Drp1 conditional knockout (Drp1fl/fl-POMC-cre:ERT2), electron microscopy, electrophysiology, ROS measurement, qPCR, PPAR inhibition\",\n      \"journal\": \"Cell metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — inducible neuron-specific KO with multiple orthogonal cellular (EM, electrophysiology, ROS, mRNA) readouts; single lab\",\n      \"pmids\": [\"28190775\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"TNFα hypersecretion from persistently activated microglia in the mediobasal hypothalamus of obese mice stimulates mitochondrial ATP production and fusion in POMC neuron neurites, increasing POMC neuronal firing rates and excitability; disruption of TNFα downstream signals TNFSF11A or NDUFAB1 in the MBH reverses mitochondrial elongation and reduces obesity.\",\n      \"method\": \"Diet-induced obesity mouse model, microglial activation assays, TNFα measurement, mitochondrial morphology analysis, electrophysiology, targeted gene disruption (viral knockdown) in the MBH\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple cellular and in vivo approaches; causal pathway established by targeted gene disruption; single lab\",\n      \"pmids\": [\"28489068\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"NeuroD1 mediates glucocorticoid-dependent repression of Pomc transcription: glucocorticoids inhibit NeuroD1 expression and the interaction of NeuroD1 with the E-box at -376/-371 of the Pomc promoter; overexpression of NeuroD1 rescues DEX-mediated inhibition of Pomc expression.\",\n      \"method\": \"Luciferase reporter assay with Pomc promoter deletion/point mutants, ChIP, qRT-PCR, NeuroD1 overexpression rescue in AtT20 cells\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — promoter mutagenesis, ChIP, and rescue experiment; multiple methods; single lab, cell line model\",\n      \"pmids\": [\"28406939\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"TCPTP (T-cell protein tyrosine phosphatase) in POMC neurons negatively regulates insulin receptor signaling and the proportion of POMC neurons activated by insulin; TCPTP levels increase with fasting and in diet-induced obesity, reducing insulin-induced POMC neuronal activation and POMC-mediated repression of hepatic glucose production.\",\n      \"method\": \"TCPTP-deficient POMC neuron mouse model, c-fos neuronal activation assays, hyperinsulinemic-euglycemic clamp, hepatic glucose production measurement\",\n      \"journal\": \"eLife\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — neuron-specific KO with clamp studies and neuronal activation readouts; single lab\",\n      \"pmids\": [\"30230471\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"SGK1/FOXO3 signaling in POMC neurons mediates glucocorticoid-induced adiposity: chronic glucocorticoid decreases SGK1 in arcuate POMC neurons; POMC-specific SGK1 knockout increases adiposity and decreases α-MSH/POMC expression via FOXO3; constitutively active SGK1 in POMC neurons prevents dexamethasone-induced adiposity. ICV α-MSH or FOXO3 knockdown rescue the metabolic phenotype.\",\n      \"method\": \"POMC neuron-specific SGK1 conditional KO and overexpression mice, POMC/α-MSH mRNA/protein measurement, ICV injection of α-MSH, adenoviral FOXO3 knockdown, body composition analysis\",\n      \"journal\": \"Diabetes\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — conditional KO plus constitutively active overexpression plus pharmacological rescue; multiple orthogonal approaches across a single lab\",\n      \"pmids\": [\"29321171\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"The Sel1L-Hrd1 ER-associated degradation (ERAD) complex in POMC neurons targets a fraction of nascent POMC for ubiquitination and proteasomal degradation, preventing accumulation of misfolded/aggregated POMC and enabling normal POMC processing and secretion. POMC-specific Sel1L deficiency causes POMC ER retention and hyperphagia-driven age-associated obesity. The disease-associated POMC-C28F mutant evades ERAD and aggregates due to an unpaired cysteine thiol at position 50.\",\n      \"method\": \"POMC neuron-specific Sel1L knockout mice, ubiquitination assays, proteasome inhibition, ER fractionation, co-immunoprecipitation, POMC-C28F mutant biochemical characterization\",\n      \"journal\": \"The Journal of clinical investigation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — reconstitution-level biochemistry (ubiquitination, fractionation, mutant analysis) combined with in vivo neuron-specific KO; multiple orthogonal methods\",\n      \"pmids\": [\"29457782\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"The BBSome complex in POMC neurons regulates trafficking of G protein-coupled receptors including serotonin 5-HT2CR to the plasma membrane and NPY2R to cilia; Bbs1 deletion in POMC neurons reduces cell surface 5-HT2CR expression, interferes with serotonin-evoked calcium signaling and membrane depolarization, and causes obesity with hyperphagia.\",\n      \"method\": \"POMC neuron-specific Bbs1 conditional KO mice, flow cytometry for receptor surface expression, calcium imaging, electrophysiology, lorcaserin anorectic response testing, late endosome staining\",\n      \"journal\": \"Diabetes\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — neuron-specific KO with multiple orthogonal mechanistic readouts (receptor trafficking, calcium signaling, electrophysiology, pharmacological challenge) in a single study\",\n      \"pmids\": [\"31127052\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"MCH reduces POMC neuronal activity and POMC expression through SIRT1/FoxO1 signaling in the hypothalamic arcuate nucleus; the metabolic (hyperphagia, adiposity, glucose intolerance) actions of MCH are abolished in mice lacking SIRT1 specifically in POMC neurons, and are independent of AgRP neurons.\",\n      \"method\": \"Pharmacological MCH injection, POMC neuron-specific SIRT1 knockout mice, chemogenetic AgRP neuron stimulation, POMC electrophysiology, POMC mRNA measurement\",\n      \"journal\": \"Diabetes\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — cell-specific KO with chemogenetic circuit dissection and electrophysiological readouts; single lab\",\n      \"pmids\": [\"31530579\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Hypothalamic arcuate POMC neurons regulate circulating adiponectin via sympathetic outflow to adipose tissue: ArcPomc-deficient mice have elevated adiponectin despite obesity, which is reversed by genetic restoration of Pomc in the ARC or by melanocortin receptor activation (melanotan II), and is mediated through norepinephrine-dependent adrenergic signaling in adipose tissue.\",\n      \"method\": \"ArcPomc-/- mice, genetic Pomc restoration, ICV/peripheral melanotan II, norepinephrine and propranolol injections, adiponectin ELISA, sympathetic marker measurement in adipose tissue\",\n      \"journal\": \"Molecular metabolism\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple pharmacological and genetic interventions showing pathway; single lab\",\n      \"pmids\": [\"32244188\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Optogenetic activation of the ARCPOMC→MeA neural circuit (POMC axon projections to MC4R- and estrogen receptor-α-expressing neurons in the medial amygdala) reduces short-term food intake, and this anorectic effect is blocked by the MC4R antagonist SHU9119.\",\n      \"method\": \"Anterograde and retrograde viral tracing, double immunohistochemistry, channelrhodopsin-2 optogenetics, MC4R antagonist pharmacology\",\n      \"journal\": \"Frontiers in neural circuits\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — optogenetic circuit activation with pharmacological receptor identification; single lab\",\n      \"pmids\": [\"33250721\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"POMC neurons in the arcuate nucleus are depolarized by lactate through two mechanisms: (1) activation of HCAR1 receptors located on astrocytes (not POMC neurons themselves), acting as an intercellular signaling relay (blocked by pertussis toxin), and (2) direct intracellular action via lactate transporters in a subset of POMC neurons (blocked by 4-CIN).\",\n      \"method\": \"Conditional genetic labeling of POMC neurons, whole-cell patch-clamp recordings, HCAR1 agonist (3Cl-HBA), pertussis toxin (Gαi/o inhibitor), 4-CIN (lactate transporter blocker), immunohistochemistry for HCAR1 localization\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — electrophysiology with pharmacological dissection of two mechanisms; receptor localization by IHC; single lab\",\n      \"pmids\": [\"34737351\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Functionally distinct subpopulations of POMC neurons defined by leptin receptor (Lepr) and GLP-1 receptor (Glp1r) expression are largely non-overlapping, have distinct basic electrophysiological properties, specific anatomical distribution within the arcuate nucleus, differentially express metabolic hormone receptors, and differ in their ability to suppress feeding.\",\n      \"method\": \"Intersectional Cre/Dre-dependent recombination mouse models, translational profiling, electrophysiology, chemogenetics, feeding assays\",\n      \"journal\": \"Nature neuroscience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — novel intersectional genetic tools combined with translational profiling, electrophysiology, and chemogenetic functional assays in a single rigorous study\",\n      \"pmids\": [\"34002087\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"mTORC1 activity in POMC neurons orchestrates the balance between POMC/GABAergic and POMC/glutamatergic subpopulations: mTORC1 blockade decreases α-MSH production, recruits POMC/GABAergic neurotransmission (restrained by CB1R signaling), simultaneously activates GABAergic POMC neurons and inhibits glutamatergic POMC neurons, causing hyperphagia.\",\n      \"method\": \"Conditional mTORC1 mutagenesis in POMC neurons, α-MSH measurement, chemogenetics, electrophysiology, optogenetics, CB1R pharmacology\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — conditional genetics plus chemogenetics plus optogenetics plus electrophysiology in a single study; multiple orthogonal circuit-level methods\",\n      \"pmids\": [\"34644574\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Mild mitoribosomal stress (Crif1 heterodeficiency) in POMC neurons increases β-endorphin and mitochondria-encoded peptide MOTS-c expression; central administration of either MOTS-c or β-endorphin recapitulates adipose tissue UPRmt and thermogenesis, identifying these POMC neuron-derived factors as mediators of exercise-induced high-turnover metabolism.\",\n      \"method\": \"POMC neuron-specific Crif1 homo- and heterodeficient mice, central peptide injection, adipose tissue UPRmt and thermogenesis measurement, running exercise paradigm\",\n      \"journal\": \"Cell metabolism\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — neuron-specific genetic model plus central peptide injection rescue; single lab\",\n      \"pmids\": [\"33535098\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"In diabetic mice, POMC-mediated antinociception in sensory neurons is lost because NF-κB p50 subunit binding to the Pomc promoter is increased, repressing Pomc transcription; additionally, μ-opioid receptor (MOR) undergoes lysosomal degradation. Viral overexpression of POMC and MOR in sensory ganglia rescues the neuropathic phenotype.\",\n      \"method\": \"Streptozotocin diabetic mouse model, ChIP for NF-κB p50 at Pomc promoter, POMC protein/mRNA quantification in peripheral nerves, MOR lysosomal degradation assay, viral overexpression rescue\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP establishes transcriptional mechanism; viral rescue confirms causality; single lab\",\n      \"pmids\": [\"33462216\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"AZGP1 in POMC neurons enhances leptin-JAK2-STAT3 signaling by interacting with acylglycerol kinase (AGK) to block AGK's ubiquitination-dependent degradation; POMC neuron-specific Azgp1 overexpression increases STAT3 phosphorylation and POMC neuronal excitability, reducing food intake and improving metabolic parameters.\",\n      \"method\": \"POMC neuron-specific Azgp1 overexpression and inducible KO mice, Co-IP for AZGP1-AGK interaction, ubiquitination assays, STAT3 phosphorylation (western blot), patch-clamp electrophysiology\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP plus ubiquitination assay establish molecular interaction; electrophysiology and metabolic phenotyping; single lab\",\n      \"pmids\": [\"38643150\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"Fam172a in POMC neurons acts as a negative regulator of histone lactylation (H4K12la): POMC neuron-specific Fam172a deletion increases H4K12la, activates glycolysis, and upregulates peptidylglycine α-amidating monooxygenase (PAM) expression, increasing α-MSH synthesis and protecting against diet-induced obesity; pharmacological inhibition of lactate production abolishes the anti-obesity effect.\",\n      \"method\": \"POMC neuron-specific Fam172a KO and overexpression mice, RNA-seq, CUT&Tag chromatin profiling for H4K12la, PAM expression analysis, α-MSH measurement, lactate inhibitor treatment\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — chromatin profiling (CUT&Tag) establishes histone modification mechanism; genetic KO and OE plus pharmacological rescue; single lab\",\n      \"pmids\": [\"39578459\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"POMC encodes a polyprotein precursor that is tissue-specifically cleaved by prohormone convertases PC1 and PC2 to produce ACTH, α-MSH, β-endorphin, and other peptides; in hypothalamic arcuate POMC neurons—functionally heterogeneous subpopulations defined by Lepr, Glp1r, and neurotransmitter identity—POMC expression and neuronal activity are regulated by leptin (via JAK/STAT and LepRb somato-dendritic signaling), insulin (via IR/PDK-1/FoxO1/TCPTP), glucose and lactate (via intracellular and astrocyte-to-neuron HCAR1 signaling), CB1R (selectively releasing β-endorphin over α-MSH), and mitochondrial dynamics (DRP1-mediated fission, TNFα-driven fusion, and mitohormesis via Crif1); at the transcriptional level, POMC is repressed by glucocorticoids through a proximal nGRE (competing with COUP factors), by FoxO1/FOXO3, by NeuroD1 suppression at an E-box, and by NF-κB p50 in peripheral sensory neurons in diabetes, while being activated by LXR-α (via an RXR-α/LXR-α heterodimer site at -73 to -52 bp), by MeCP2/HDAC2/DNMT1-dependent DNA methylation changes, and by histone lactylation regulated through Fam172a; newly synthesized POMC undergoes Sel1L-Hrd1 ERAD-mediated quality control in the ER to prevent misfolded/aggregated POMC accumulation, and its C-terminal α-MSH is amidated by the copper/ascorbate-dependent enzyme PAM; processed melanocortin peptides signal through MC1R, MC2R (requiring MRAP for trafficking), MC3R, and MC4R, with the HFRW motif (particularly R8) essential for receptor binding and cAMP activation, while β-endorphin acts at opioid receptors to modulate pain and feeding.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"POMC encodes a polyprotein precursor whose protein-coding sequence resides largely within a single large exon downstream of a small signal-peptide exon, with the segment encoding its bioactive peptides (ACTH, \\u03b2-endorphin, MSH peptides) highly conserved across mammals [#0, #1]. The precursor is cleaved cell-specifically by the prohormone convertases PC1 and PC2, which are co-expressed with POMC peptides and drive differential tissue-specific processing into \\u03b1-MSH, ACTH, \\u03b2-MSH, and \\u03b2-endorphin [#5]; failure of normal processing yields predominantly ACTH precursors, as seen in ectopic ACTH syndrome [#4]. The HFRW motif of the processed melanocortin peptides is essential for receptor function: the R8 residue is required for ACTH binding and cAMP activation at MC2R and for \\u03b1-MSH activation of MC1R and MC4R, and its mutation produces bioinactive hormones [#12]. Newly synthesized POMC is subject to Sel1L-Hrd1 ERAD quality control that degrades a fraction of nascent protein to prevent misfolded/aggregated accumulation and permit normal processing and secretion [#25]. In the hypothalamic arcuate nucleus, POMC neurons constitute the anorexigenic arm of the melanocortin system: they are depolarized by leptin and exert autoinhibition through melanocortin peptides [#6], comprise functionally distinct Lepr- and Glp1r-defined subpopulations [#31], and signal onward through MC4R-expressing target circuits such as the ARC\\u2192medial amygdala projection to suppress feeding [#29]. POMC neuronal activity and Pomc expression integrate hormonal and metabolic inputs \\u2014 leptin via JAK/STAT and TrpC5 channels [#16, #19], insulin via PDK-1/FoxO1 and TCPTP [#11, #23], lactate via astrocytic HCAR1 and direct uptake [#30], CB1R, which selectively releases \\u03b2-endorphin to drive feeding [#14], and mitochondrial dynamics governing leptin sensitivity and excitability [#20, #21]. Pomc transcription is repressed by glucocorticoids through a proximal nGRE that competes with COUP factors [#3] and via NeuroD1 and SGK1/FOXO3 [#22, #24], and activated by an RXR-\\u03b1/LXR-\\u03b1 heterodimer [#9], by MeCP2/HDAC2/DNMT1-dependent methylation [#13], and by histone lactylation controlled through Fam172a, which also tunes PAM-dependent \\u03b1-MSH amidation [#36]. Loss-of-function in POMC peptide signaling underlies human disease, including the bioinactive ACTH/\\u03b1-MSH phenotype caused by the p.R8C mutation [#12].\"\n,\n  \"teleology\": [\n    {\n      \"year\": 1980,\n      \"claim\": \"Established the genomic architecture of the POMC precursor gene, showing that all bioactive peptides are encoded together within a single large, evolutionarily conserved exon.\",\n      \"evidence\": \"Genomic DNA cloning and sequencing of bovine and rat POMC loci\",\n      \"pmids\": [\"6253815\", \"6255341\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Does not address how the single transcript is processed into distinct peptides\", \"No tissue-specific regulation defined\"]\n    },\n    {\n      \"year\": 1984,\n      \"claim\": \"Defined glucocorticoid negative feedback on the corticotrope, distinguishing rapid non-genomic suppression of ACTH secretion from slow genomic reduction of POMC mRNA.\",\n      \"evidence\": \"In vitro corticotrope secretion assays, in vivo pharmacology, POMC mRNA analysis (review of primary data)\",\n      \"pmids\": [\"6323158\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular DNA elements mediating genomic repression not yet identified\", \"Identity of intermediate corticosteroid-dependent protein unknown\"]\n    },\n    {\n      \"year\": 1989,\n      \"claim\": \"Identified the cis-regulatory basis of glucocorticoid repression, mapping a proximal nGRE that binds glucocorticoid receptor and COUP factors mutually exclusively within a fragment sufficient for pituitary-specific expression.\",\n      \"evidence\": \"Transgenic mice plus cell culture transfection and DNA-protein binding assays\",\n      \"pmids\": [\"2698828\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Does not establish in vivo contribution of COUP competition\", \"Other regulatory inputs to the promoter not yet defined\"]\n    },\n    {\n      \"year\": 1994,\n      \"claim\": \"Showed that aberrant POMC processing underlies ectopic ACTH syndrome, with unprocessed precursors rather than mature ACTH as the dominant circulating species.\",\n      \"evidence\": \"Specific IRMA assays and plasma chromatography in a patient cohort\",\n      \"pmids\": [\"8137518\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular cause of processing failure in tumors not resolved\", \"Convertase identity not directly assayed here\"]\n    },\n    {\n      \"year\": 2000,\n      \"claim\": \"Demonstrated that cell-specific POMC processing depends on differential PC1 and PC2 expression co-localized with the peptide products, explaining tissue-specific peptide output.\",\n      \"evidence\": \"In situ hybridization and immunohistochemistry in murine skin\",\n      \"pmids\": [\"10858267\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Causal requirement for each convertase not shown by genetic deletion\", \"Quantitative contribution to each peptide undefined\"]\n    },\n    {\n      \"year\": 2001,\n      \"claim\": \"Established leptin's electrophysiological action on arcuate POMC neurons, identifying direct cation-channel depolarization plus reduced GABAergic inhibition as the basis of leptin-driven activation.\",\n      \"evidence\": \"Patch-clamp electrophysiology on GFP-tagged POMC neurons in transgenic mice\",\n      \"pmids\": [\"11373681\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular identity of the cation channel not specified here\", \"Downstream signaling to Pomc transcription not addressed\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Demonstrated a local extra-pituitary CRH-POMC-corticosteroid axis in skin, with CRH driving POMC/ACTH/corticosterone output in dermal fibroblasts via cAMP.\",\n      \"evidence\": \"cAMP, mRNA, protein, and hormone assays in fibroblast and keratinocyte cultures; local co-expression by in situ RT-PCR/LCM\",\n      \"pmids\": [\"15833364\", \"11511529\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Physiological significance of cutaneous POMC in vivo unclear\", \"Convertase processing in skin fibroblasts not detailed\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Identified a positive transcriptional regulator of POMC, showing an RXR-\\u03b1/LXR-\\u03b1 heterodimer activates the proximal promoter and raises ACTH/corticosterone output.\",\n      \"evidence\": \"EMSA, ChIP, luciferase reporter, siRNA knockdown, in vivo LXR agonist treatment\",\n      \"pmids\": [\"19036902\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Endogenous ligand context not defined\", \"Interaction with repressive nGRE machinery unresolved\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Defined intracellular phosphatase and kinase control of POMC neuron leptin/insulin signaling, with PTP1B/SHP2 and PDK-1/FoxO1 regulating Pomc expression and energy balance.\",\n      \"evidence\": \"POMC neuron-specific conditional knockouts and FoxO1 transgenics with metabolic and molecular readouts\",\n      \"pmids\": [\"20160350\", \"20103739\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct transcriptional targets of FoxO1 on the Pomc promoter not mapped here\", \"Integration of phosphatase signals with channel activity unclear\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Provided human genetic proof that the R8 residue of the HFRW motif is essential for melanocortin peptide receptor activation, as the p.R8C mutation yields immunoreactive but bioinactive ACTH and \\u03b1-MSH.\",\n      \"evidence\": \"Exome/Sanger sequencing plus synthetic peptide binding and cAMP assays in MC1R/MC2R/MC4R cells\",\n      \"pmids\": [\"23293326\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of R8 contribution not resolved\", \"Effect on \\u03b2-endorphin signaling not tested\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Established epigenetic control of Pomc, showing CpG methylation represses transcription via MeCP2/HDAC2/DNMT1 and that early-life stress alters this mark.\",\n      \"evidence\": \"Bisulfite sequencing and ChIP in pituitary tissue and AtT20 cells\",\n      \"pmids\": [\"24506071\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism linking stress to methylation change not defined\", \"Single cell-line ChIP validation\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Revealed peptide-selective output and developmental scope of POMC cells: CB1R selectively releases \\u03b2-endorphin to drive feeding, and POMC progenitors give rise to reproductive Kiss1 neurons.\",\n      \"evidence\": \"DREADD chemogenetics, peptide-specific release measurement, naloxone pharmacology, and Cre/loxP lineage tracing in mice\",\n      \"pmids\": [\"25707796\", \"25855171\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism of differential vesicular sorting of \\u03b2-endorphin vs \\u03b1-MSH not defined\", \"Functional role of POMC-derived Kiss1 neurons in adult reproduction not fully tested\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Expanded the regulatory network controlling Pomc, identifying GPR45-JAK/STAT input, ER stress sensing via IRE1\\u03b1, and Tpit/Pitx1-independent E2F1 activation in ectopic tumors.\",\n      \"evidence\": \"Knockout mouse phenotyping, pathway analysis, pharmacological rescue, promoter reporter/ChIP/xenograft studies\",\n      \"pmids\": [\"27500489\", \"28028078\", \"27935805\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct GPR45 ligand and coupling to STAT not resolved\", \"Crosstalk between ER stress and transcription unmapped\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Defined the molecular effectors of POMC neuron excitability and metabolic responsiveness, including TrpC5 channels for leptin/serotonin responses, glucocorticoid repression through NeuroD1, and bidirectional control by mitochondrial fission and fusion.\",\n      \"evidence\": \"Neuron-specific conditional knockouts, electrophysiology, EM, ROS measurement, promoter mutagenesis/ChIP, and DIO/microglia models\",\n      \"pmids\": [\"28099839\", \"28190775\", \"28489068\", \"28406939\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How mitochondrial morphology couples to firing not fully mechanistic\", \"Integration of NeuroD1 with nGRE repression unresolved\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Established ER quality control and additional signaling control of POMC, showing Sel1L-Hrd1 ERAD prevents POMC aggregation, TCPTP restrains insulin signaling, and SGK1/FOXO3 mediates glucocorticoid-induced adiposity.\",\n      \"evidence\": \"Neuron-specific knockouts, ubiquitination/fractionation biochemistry, disease-mutant analysis, clamp studies, and pharmacological rescue\",\n      \"pmids\": [\"29457782\", \"30230471\", \"29321171\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Determinants of which nascent POMC is routed to ERAD vs secretion not defined\", \"Connection of FOXO3 to direct Pomc promoter occupancy not shown\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Defined receptor-trafficking control of POMC neuron signaling via the BBSome, which delivers 5-HT2CR to the surface and NPY2R to cilia, linking ciliary trafficking to satiety signaling.\",\n      \"evidence\": \"POMC neuron-specific Bbs1 KO with flow cytometry, calcium imaging, electrophysiology, and pharmacological challenge\",\n      \"pmids\": [\"31127052\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Full repertoire of BBSome-trafficked GPCRs in POMC neurons unknown\", \"Direct effect on POMC peptide output not measured\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Connected arcuate POMC output to peripheral physiology and downstream circuits, regulating adipose adiponectin via sympathetic outflow and suppressing feeding through an MC4R-dependent ARC\\u2192medial amygdala projection.\",\n      \"evidence\": \"ArcPomc mutant mice, melanocortin and adrenergic pharmacology, viral tracing, and channelrhodopsin optogenetics with MC4R antagonism\",\n      \"pmids\": [\"32244188\", \"33250721\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Identity of melanocortin receptor mediating sympathetic adiponectin control incompletely defined\", \"Relative contribution of MeA circuit to overall feeding control unquantified\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Resolved POMC neuron heterogeneity and additional metabolic sensing, defining non-overlapping Lepr/Glp1r and GABAergic/glutamatergic subpopulations, mTORC1 control of neurotransmitter balance, lactate sensing via astrocytic HCAR1, mitohormesis through Crif1, and NF-\\u03baB repression of peripheral Pomc in diabetes.\",\n      \"evidence\": \"Intersectional genetics, translational profiling, electrophysiology, chemogenetics/optogenetics, pharmacology, and ChIP across multiple studies\",\n      \"pmids\": [\"34002087\", \"34644574\", \"34737351\", \"33535098\", \"33462216\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Functional division of labor among subpopulations incompletely mapped\", \"Mechanism coupling mitoribosomal stress to peptide selection not defined\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Identified new molecular regulators of POMC neuron signaling and peptide synthesis, with AZGP1 stabilizing AGK to amplify leptin-JAK2-STAT3 signaling and Fam172a restraining histone lactylation to control PAM expression and \\u03b1-MSH synthesis.\",\n      \"evidence\": \"Neuron-specific overexpression/KO mice, Co-IP, ubiquitination assays, CUT&Tag chromatin profiling, and pharmacological rescue\",\n      \"pmids\": [\"38643150\", \"39578459\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"AZGP1-AGK interaction validated mainly by Co-IP in single lab\", \"Generality of lactylation-PAM axis beyond diet-induced obesity untested\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How the diverse transcriptional, epigenetic, ER-quality-control, channel, and mitochondrial inputs are integrated within single POMC neuron subpopulations to determine the precise stoichiometry of \\u03b1-MSH versus \\u03b2-endorphin output remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unified model linking subpopulation identity to differential peptide secretion\", \"Mechanism of selective vesicular sorting of POMC-derived peptides unknown\", \"In vivo interplay among competing transcriptional regulators at the Pomc promoter not reconstructed\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0048018\", \"supporting_discovery_ids\": [12, 14, 29]},\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [3, 9, 18, 22]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005783\", \"supporting_discovery_ids\": [25, 17]},\n      {\"term_id\": \"GO:0005576\", \"supporting_discovery_ids\": [4, 8]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [6, 12, 14]},\n      {\"term_id\": \"R-HSA-392499\", \"supporting_discovery_ids\": [5, 25, 36]},\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [3, 9, 22]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"PCSK1\", \"PCSK2\", \"MC2R\", \"MC1R\", \"MC4R\", \"PAM\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":8,"faith_total":8,"faith_pct":100.0}}