{"gene":"KLF7","run_date":"2026-04-28T18:30:27","timeline":{"discoveries":[{"year":2005,"finding":"KLF7 transcriptionally activates the p21waf/cip and p27kip1 genes in olfactory sensory neurons; loss of KLF7 in mice causes neurite outgrowth deficits and axonal misprojections, demonstrating its role in neuronal morphogenesis through regulation of Cip/Kip CDK inhibitors that also promote cytoskeletal dynamics.","method":"Cotransfection/reporter assays, in situ hybridization, immunoblot, Klf7 knockout mice","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 — KO mouse phenotype with defined molecular targets, replicated by multiple orthogonal methods in a highly cited paper","pmids":["15964824"],"is_preprint":false},{"year":2001,"finding":"KLF7 overexpression in fibroblasts and neuroblastoma cells represses cyclin D1, activates p21, and causes G1 growth arrest, consistent with a role in cell cycle exit during neuronal differentiation.","method":"Forced overexpression in cultured cells, gene expression analysis","journal":"Developmental biology","confidence":"Medium","confidence_rationale":"Tier 3 — single-lab overexpression with phenotypic readout but no direct promoter binding demonstrated here","pmids":["11336497"],"is_preprint":false},{"year":2006,"finding":"KLF7 directly activates the promoters of OMP (olfactory marker protein) and the adhesion molecule L1 by binding to CACCC motifs, linking KLF7 to axonal growth and cell adhesion programs in olfactory sensory neurons.","method":"DNA microarray of Klf7-/- mice, cell transfection reporter assays, promoter binding analysis","journal":"Gene","confidence":"High","confidence_rationale":"Tier 2 — genome-wide expression profiling combined with direct promoter transactivation assays","pmids":["17123745"],"is_preprint":false},{"year":2006,"finding":"KLF7 and Brn3a synergistically activate the TrkA enhancer in vitro, and cooperation between these two transcription factors is required for endogenous TrkA gene expression and survival of nociceptive sensory neurons in vivo.","method":"In vitro reporter assays, Brn3a/Klf7 double-knockout mice, immunohistochemistry","journal":"Developmental biology","confidence":"High","confidence_rationale":"Tier 1-2 — genetic epistasis with double-mutant rescue plus in vitro transactivation assays","pmids":["17011544"],"is_preprint":false},{"year":2006,"finding":"MoKA, an F-box-containing protein, interacts with KLF7 and stimulates its transcriptional activity; MoKA shuttles between nucleus and cytoplasm via distinct NLS and NES sequences including a CRM1-dependent leucine-rich export signal.","method":"Co-IP, forced expression of fusion proteins, pharmacological inhibition of CRM1, GAL4 chimeric transcriptional assays","journal":"Nucleic acids research","confidence":"High","confidence_rationale":"Tier 2 — reciprocal interaction demonstrated with multiple functional localization and transactivation assays","pmids":["16990251"],"is_preprint":false},{"year":2007,"finding":"KLF7 binds a novel regulatory element (TCaRE3) in the TRKB promoter, which is required for Ca2+- and cAMP-stimulated TRKB transcription in neurons; this element is 100% conserved between mouse and human TRKB promoters.","method":"Electrophoretic mobility shift assay (EMSA), promoter mutagenesis, reporter assays in neurons","journal":"Molecular and cellular neurosciences","confidence":"High","confidence_rationale":"Tier 1-2 — direct DNA binding demonstrated by EMSA, confirmed by mutagenesis, functional consequence shown in neuronal Ca2+ signaling","pmids":["17553693"],"is_preprint":false},{"year":2010,"finding":"KLF7 is required for in vitro differentiation of neuroectodermal (PC12, neural stem cells) and mesodermal (ES cell-derived cardiomyocytes, MEF adipogenic/osteogenic) lineages; shRNA silencing correlates with downregulation of MAP2 and TrkA in PC12 cells and BLBP/FABP7 in neural stem cells.","method":"shRNA-mediated silencing, KO mice, differentiation assays, immunostaining","journal":"Experimental cell research","confidence":"High","confidence_rationale":"Tier 2 — loss-of-function with defined molecular and cellular phenotypes across multiple lineages","pmids":["20580711"],"is_preprint":false},{"year":2016,"finding":"KLF7 functions as a mediator of TGF-β and Notch3 signaling to maintain satellite cell quiescence; knockdown of KLF7 promotes satellite cell activation, and acetylation of Lys227 and/or Lys231 in the KLF7 DNA-binding domain is required for its quiescence-regulating activity.","method":"shRNA knockdown, overexpression, flow cytometry, acetylation mutagenesis, Notch/TGF-β pathway inhibition","journal":"Stem cells","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal methods including PTM mutagenesis and pathway epistasis in muscle stem cells","pmids":["26930448"],"is_preprint":false},{"year":2017,"finding":"KLF7 promotes the corneal progenitor cell state and antagonizes KLF4-mediated corneal epithelial differentiation; ChIP-seq showed KLF7 binds corneal epithelial enhancers enriched for KLF motifs and occupies many of the same targets as KLF4 with opposing effects.","method":"ChIP-seq (H3K4me3, H3K4me1, H3K27ac), KLF7 knockdown/overexpression, reporter assays","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1-2 — genome-wide ChIP-seq combined with functional loss- and gain-of-function experiments","pmids":["28916725"],"is_preprint":false},{"year":2018,"finding":"KLF7 transcriptionally activates IL-6 expression in adipocytes by directly binding the IL-6 promoter region, acting downstream of the TLR4/NF-κB pathway activated by palmitic acid.","method":"Luciferase reporter assay, siRNA knockdown, Western blot, qRT-PCR","journal":"Mediators of inflammation","confidence":"Medium","confidence_rationale":"Tier 3 — direct promoter transactivation shown by luciferase assay; pathway placement by upstream knockdown experiments","pmids":["30598636"],"is_preprint":false},{"year":2019,"finding":"KLF7 is ubiquitylated and targeted for proteasomal degradation by the SCF-Fbxw7 E3 ubiquitin ligase complex; this requires GSK-3-mediated phosphorylation of a Cdc4 phosphodegron (CPD) in KLF7. Fbxw7 overexpression down-regulates p21Cip1, a transcriptional target of KLF7.","method":"DiPIUS differential proteomics, Co-IP, polyubiquitylation assay, CPD mutagenesis, GSK-3 inhibitor treatment, protein stability assay","journal":"Genes to cells","confidence":"High","confidence_rationale":"Tier 1 — substrate identification by mass spectrometry confirmed by interaction, ubiquitylation assays, and mutagenesis of the degron","pmids":["30838725"],"is_preprint":false},{"year":2019,"finding":"KLF7 transcriptionally activates argininosuccinate lyase (ASL), promoting polyamine biosynthesis via the urea cycle and supporting glioma cell proliferation and tumorigenesis.","method":"KLF7 knockdown/overexpression, reporter assays, metabolite analysis, xenograft tumor models","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 3 — single lab with transcriptional activation assay and functional rescue, but no direct ChIP binding shown","pmids":["31018905"],"is_preprint":false},{"year":2020,"finding":"KLF7 simultaneously transcriptionally targets PFKL (rate-limiting glycolysis enzyme) and ACADL (key fatty acid oxidation enzyme), and cardiac-specific KLF7 knockout or overexpression induces distinct forms of cardiac hypertrophy by shifting metabolic balance; knockdown of PFKL or overexpression of ACADL partially rescues KLF7-deficient hypertrophy.","method":"Cardiac-specific KO and overexpression mice, ChIP-seq/ChIP-qPCR, metabolic flux analysis, genetic rescue experiments","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 1-2 — direct target identification by ChIP, cardiac-specific KO/OE models, and epistasis rescue experiments","pmids":["36810848"],"is_preprint":false},{"year":2020,"finding":"KLF7 knockdown in pancreatic ductal adenocarcinoma (PDAC) cells inhibits IFN-stimulated gene (ISG) expression and downregulates DLG3, causing Golgi complex fragmentation and reduced protein glycosylation, leading to decreased secretion of cancer-promoting chemokines and inhibited tumor growth and metastasis.","method":"shRNA knockdown, cell culture, xenograft mouse models, pathway analysis","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 2 — multiple downstream pathway readouts with in vivo validation and mechanistic specificity","pmids":["32430335"],"is_preprint":false},{"year":2021,"finding":"KLF7 transcriptionally activates VPS35, which then interacts with CCDC85C (confirmed by Co-IP) to activate β-catenin signaling, promoting HCC cell proliferation and invasion.","method":"ChIP-qPCR, luciferase reporter assays, Co-IP, β-catenin inhibitor rescue, xenograft models","journal":"Cell & bioscience","confidence":"Medium","confidence_rationale":"Tier 2 — direct transcriptional target confirmed by ChIP and luciferase, protein interaction by Co-IP, functional rescue with inhibitor","pmids":["33858520"],"is_preprint":false},{"year":2022,"finding":"KLF7 binds the HDAC4 promoter to activate HDAC4 transcription; HDAC4 then reduces histone acetylation at the miR-148b promoter to suppress miR-148b-3p, thereby promoting NCOR1 transcription and limiting glucose metabolic reprogramming in macrophages.","method":"Dual-luciferase assay, ChIP assay, Seahorse metabolic flux analysis, HDAC4 rescue experiments","journal":"Gerontology","confidence":"Medium","confidence_rationale":"Tier 2 — direct promoter binding by ChIP and luciferase, epigenetic mechanism, metabolic phenotype quantified","pmids":["35439761"],"is_preprint":false},{"year":2022,"finding":"KLF7 promotes osteoclast differentiation by suppressing Heme oxygenase-1 (HO-1) expression; ChIP assay confirmed KLF7 binds the HO-1 promoter, and HO-1 overexpression reversed the KLF7-mediated promotion of osteoclastogenesis.","method":"ChIP assay, TRAP staining, Western blot, rescue experiments with HO-1 agonist Hemin","journal":"Frontiers in genetics","confidence":"Medium","confidence_rationale":"Tier 2 — direct promoter binding demonstrated by ChIP with functional rescue","pmids":["35419025"],"is_preprint":false},{"year":2022,"finding":"p65 (NF-κB subunit) transcriptionally upregulates KLF7 expression downstream of GPR40/120 activation by palmitic acid; ChIP assay confirmed p65 binding to the KLF7 promoter, establishing the GPRs/NF-κB/KLF7 pathway in adipocytes and liver cells.","method":"Luciferase reporter gene assay, ChIP assay, GPR blocker experiments in vivo and in vitro","journal":"Nutrition & diabetes","confidence":"Medium","confidence_rationale":"Tier 2 — direct p65 binding to KLF7 promoter by ChIP, confirmed with pharmacological blockade in vivo","pmids":["35443706"],"is_preprint":false},{"year":2023,"finding":"KLF7 transcriptionally activates PKCζ expression in adipocytes (confirmed by luciferase reporter and ChIP assays), leading to activation of the NF-κB pathway and IL-6 production; fat-conditional KLF7 KO mice show decreased PKCζ, p-IκB, p-p65, and IL-6 in adipose tissue.","method":"Luciferase reporter assay, ChIP assay, fat-conditional KO mice, Western blot","journal":"FASEB journal","confidence":"High","confidence_rationale":"Tier 1-2 — direct transcriptional target confirmed by ChIP and luciferase, validated in vivo with conditional KO mice","pmids":["37342904"],"is_preprint":false},{"year":2023,"finding":"HMGB1 upregulates KLF7 expression through the TLR4/RAGE-PI3K-AKT-NF-κB pathway; KLF7 in turn transactivates TLR4 and PTK2 (FAK), forming an HMGB1-KLF7-TLR4 positive feedback loop that promotes HCC metastasis.","method":"Luciferase reporter assay, ChIP assay, AAV-mediated KLF7 knockdown, orthotopic xenograft models, pharmacological inhibitor combination","journal":"Theranostics","confidence":"High","confidence_rationale":"Tier 2 — direct promoter binding by ChIP and luciferase, positive feedback loop validated in vivo with multiple models","pmids":["37554278"],"is_preprint":false},{"year":2024,"finding":"KLF7 directly transcriptionally activates IGF2BP2 by binding to its promoter and super-enhancer regions in head and neck squamous cell carcinoma, as demonstrated by ChIP-qPCR and dual-luciferase reporter assays; CRISPR/Cas9-mediated SE deactivation reduced IGF2BP2 transcription.","method":"H3K27Ac ChIP-seq, ChIP-qPCR, dual-luciferase reporter assay, CRISPR/Cas9 SE deactivation, orthotopic xenograft models","journal":"Journal of experimental & clinical cancer research","confidence":"High","confidence_rationale":"Tier 1-2 — genome-wide ChIP-seq, direct binding confirmed by ChIP-qPCR and luciferase, CRISPR validation","pmids":["38443991"],"is_preprint":false},{"year":2024,"finding":"KLF7 directly binds the PDGFB promoter (binding site TGGGTGGAG) to transcriptionally activate PDGFB secretion, which then promotes colon adenocarcinoma progression through PDGFRβ-activated MAPK/ERK, PI3K/AKT, and JAK/STAT3 pathways.","method":"ChIP assay, luciferase reporter assay, in vitro and in vivo tumor models, pharmacological PDGFRβ inhibition with sunitinib","journal":"International journal of biological sciences","confidence":"Medium","confidence_rationale":"Tier 2 — direct promoter binding by ChIP, pathway activation confirmed with inhibitors","pmids":["38164176"],"is_preprint":false},{"year":2024,"finding":"KLF7 transcriptionally activates ALKBH5 (an m6A demethylase), which decreases m6A modification on ACSL4 mRNA, reducing ACSL4 protein levels and inhibiting ferroptosis in human microvascular endothelial cells exposed to ox-LDL.","method":"Dual-luciferase assay, ChIP assay, MeRIP (m6A immunoprecipitation), ferroptosis marker analysis","journal":"Cytotechnology","confidence":"Medium","confidence_rationale":"Tier 2 — direct KLF7-ALKBH5 promoter binding by ChIP and luciferase, epitranscriptomic mechanism by MeRIP","pmids":["39435423"],"is_preprint":false},{"year":2024,"finding":"USP7 stabilizes NRF1 protein by deubiquitination (confirmed by Co-IP); NRF1 then binds the KLF7 promoter to enhance its transcription (confirmed by ChIP and dual-luciferase assay), thereby protecting neurons from inflammation and apoptosis.","method":"Co-IP, ChIP assay, dual-luciferase reporter assay, Western blot, cell viability assays","journal":"Neurological research","confidence":"Medium","confidence_rationale":"Tier 2 — direct protein interaction by Co-IP, transcriptional regulation of KLF7 by NRF1 confirmed by ChIP and luciferase","pmids":["39007840"],"is_preprint":false},{"year":2024,"finding":"KLF7 promotes neuroblastoma differentiation by directly binding the promoters of AHNAK, AHNAK2, and GDPD5 (confirmed by ChIP), upregulating their expression and altering GTPase activity; KLF7 acts independently of and cooperatively with the retinoic acid pathway.","method":"ChIP assay, promoter reporter assays, neuroblastoma differentiation assays, enhancer profiling","journal":"The FEBS journal","confidence":"Medium","confidence_rationale":"Tier 2 — direct promoter binding by ChIP with functional differentiation phenotype","pmids":["38924469"],"is_preprint":false},{"year":2024,"finding":"KLF7 transcriptionally activates SLC1A5 (confirmed by ChIP binding to SLC1A5 promoter), promoting tryptophan uptake and serotonin biosynthesis, which supports HCC cell proliferation and metastasis.","method":"ChIP assay, KLF7 knockdown/overexpression, metabolite measurements (tryptophan, serotonin), xenograft tumor models","journal":"Journal of cellular and molecular medicine","confidence":"Medium","confidence_rationale":"Tier 2 — direct promoter binding by ChIP, metabolic consequence quantified, in vivo validation","pmids":["39648156"],"is_preprint":false},{"year":2024,"finding":"KLF7 directly binds the CCL2 promoter region and transcriptionally activates CCL2 in bone marrow adipocytes, a process triggered by palmitic acid via GPR40/120 signaling, promoting prostate cancer cell proliferation and invasion.","method":"ChIP assay, luciferase reporter assay, conditioned medium experiments, Co-culture assays, in vivo HFD mouse model","journal":"BMC cancer","confidence":"Medium","confidence_rationale":"Tier 2 — direct promoter binding by ChIP and luciferase, in vivo validation in obesity model","pmids":["38221626"],"is_preprint":false},{"year":2024,"finding":"KLF7 directly binds the miR-139-5p promoter to repress its transcription (confirmed by ChIP and dual-luciferase assay), thereby upregulating miR-139-5p's target TPD52 and enhancing colorectal cancer cell invasion and migration.","method":"ChIP assay, dual-luciferase reporter assay, siRNA knockdown, in vivo xenograft","journal":"Cancer biology & therapy","confidence":"Medium","confidence_rationale":"Tier 2 — direct promoter binding by ChIP and luciferase with functional consequences","pmids":["39097779"],"is_preprint":false},{"year":2024,"finding":"KLF7 maintains stemness of oral squamous cell carcinoma by directly transcriptionally activating ITGA2 (confirmed by ChIP-seq and dual-luciferase assay); ITGA2 activates PI3K-AKT, MAPK, and Hippo signaling upon binding type I collagen.","method":"ChIP-seq, dual-luciferase assay, tumor sphere formation, flow cytometry, in vivo limiting dilution tumorigenicity, ITGA2 inhibitor xenograft experiments","journal":"Cell death & disease","confidence":"High","confidence_rationale":"Tier 1-2 — ChIP-seq with direct promoter validation, multiple functional assays in vitro and in vivo","pmids":["40316546"],"is_preprint":false},{"year":2025,"finding":"KLF7 orchestrates hippocampal development by transcriptionally activating Draxin (a neural chemorepellent); KLF7 conditional knockout in hippocampal progenitors disrupts neurogenesis and neuronal migration, and Draxin overexpression rescues granule cell migration defects.","method":"Conditional KO mice (Emx1-Cre;Klf7F/F), transcriptomic profiling, Draxin overexpression rescue, behavioral testing","journal":"Development","confidence":"High","confidence_rationale":"Tier 2 — conditional KO with defined molecular target and in vivo rescue experiment","pmids":["40762575"],"is_preprint":false},{"year":2025,"finding":"KLF7 represses MKNK2 transcription (confirmed by ChIP and dual-luciferase assay), thereby inhibiting HIF-1 signaling and M1 microglia polarization after ischemic stroke; KLF7 overexpression in vivo ameliorates brain damage after MCAO/R.","method":"ChIP assay, dual-luciferase reporter assay, lentiviral overexpression/knockdown in rats, MCAO/R model","journal":"Brain and behavior","confidence":"Medium","confidence_rationale":"Tier 2 — direct promoter binding confirmed, pathway epistasis validated in vivo","pmids":["40923147"],"is_preprint":false},{"year":2025,"finding":"KLF7 directly transcriptionally activates PPP1R14C by binding its promoter; PPP1R14C inhibits PP1 phosphatase, maintaining CDK1 hyperphosphorylation and promoting lung squamous cell carcinoma proliferation and invasion.","method":"ChIP assay, luciferase reporter assay, PP1-CDK1 interaction analysis, CDK1 inhibitor rescue","journal":"Scientific reports","confidence":"Medium","confidence_rationale":"Tier 2 — direct promoter binding by ChIP and luciferase, mechanistic cascade confirmed pharmacologically","pmids":["41699008"],"is_preprint":false},{"year":2025,"finding":"KLF7 is expressed in human pluripotent stem cells and can replace KLF4 in OSKM reprogramming to generate iPSCs; KLF7 forced expression in conventional hPSCs induces naive pluripotency markers and enables efficient chemical resetting, while CRISPRi-mediated KLF7 silencing reduces resetting efficiency.","method":"Transcription factor-mediated reprogramming, CRISPRi silencing, transcriptome analysis, naive pluripotency assays","journal":"EMBO reports","confidence":"High","confidence_rationale":"Tier 2 — gain- and loss-of-function in human PSCs with defined functional outcomes in reprogramming","pmids":["41094238"],"is_preprint":false},{"year":2025,"finding":"MLL1 promotes KLF7 transcription through H3K4me3 histone modification at the KLF7 promoter; KLF7 in turn transcriptionally activates USP7 (confirmed by ChIP and dual-luciferase assay), forming a MLL1/KLF7/USP7 axis that facilitates invasion of fibroblast-like synoviocytes in rheumatoid arthritis.","method":"ChIP assay, dual-luciferase assay, shRNA knockdown, Transwell invasion assay","journal":"In vitro cellular & developmental biology","confidence":"Medium","confidence_rationale":"Tier 2 — epigenetic writer (MLL1) identified, downstream transcriptional activation of USP7 by KLF7 confirmed by ChIP and luciferase","pmids":["41483084"],"is_preprint":false},{"year":2025,"finding":"KLF7 promotes KLF7 target gene LOX transcription in head and neck squamous cell carcinoma, and LOX-driven extracellular matrix crosslinking creates a stiff microenvironment that recruits tumor-associated macrophages and disrupts CD8+ T cell killing.","method":"ChIP assay (implied by direct transcriptional activation), in vitro and in vivo tumor models, macrophage recruitment assay","journal":"Cancer letters","confidence":"Medium","confidence_rationale":"Tier 2 — direct transcriptional target identified with functional consequence in tumor immune microenvironment in vivo","pmids":["41482204"],"is_preprint":false},{"year":2025,"finding":"KLF7 transcriptionally activates LIMK1 (confirmed by ChIP and dual-luciferase assay); LIMK1 then interacts with and phosphorylates SRPK1 (confirmed by GST pull-down and Co-IP), amplifying inflammatory responses in alveolar epithelial cells under LPS-induced injury.","method":"ChIP assay, dual-luciferase reporter assay, GST pull-down, Co-IP, ELISA","journal":"Central-European journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 — direct promoter binding confirmed, protein-protein interaction of LIMK1/SRPK1 validated by pull-down and Co-IP","pmids":["42028385"],"is_preprint":false},{"year":2023,"finding":"KLF7 promotes IL-6 generation in brown adipocytes downstream of beta-3 adrenergic receptor (ADRB3) signaling; KLF7 knockdown largely blunts ADRB3 agonist-induced IL-6 expression in primary brown adipocytes.","method":"ADRB3 agonist treatment, cold stimulation in vivo, KLF7 knockdown in primary brown adipocytes, IL-6 quantification","journal":"Heliyon","confidence":"Medium","confidence_rationale":"Tier 3 — pathway placement demonstrated by knockdown with physiological stimuli, but no direct promoter binding shown","pmids":["37025783"],"is_preprint":false},{"year":2021,"finding":"GNA14 stimulates KLF7 expression in endometrial cancer cells, and KLF7 in turn transcriptionally activates hyaluronan synthase 2 (HAS2); knockdown of HAS2 reversed the oncogenic effects of KLF7 overexpression.","method":"RNA sequencing, Western blot, qRT-PCR, xenograft tumor model, KLF7/HAS2 knockdown rescue","journal":"BMC cancer","confidence":"Medium","confidence_rationale":"Tier 3 — downstream target identified by RNA-seq with functional rescue, but direct promoter binding not confirmed by ChIP","pmids":["33892667"],"is_preprint":false},{"year":2025,"finding":"KLF7 directly binds the PDE4 promoter to transcriptionally repress its expression (confirmed by ChIP and dual-luciferase assay) in granulosa cells, and PDE4 overexpression reverses the KLF7-mediated protection against DHT-induced apoptosis in a PCOS cell model.","method":"ChIP assay, dual-luciferase reporter assay, overexpression/knockdown, CCK-8, TUNEL, EdU assays","journal":"Endocrine connections","confidence":"Medium","confidence_rationale":"Tier 2 — direct promoter binding by ChIP and luciferase, functional rescue by target overexpression","pmids":["41071839"],"is_preprint":false},{"year":2021,"finding":"PU.1 directly binds KLF7 (confirmed by Co-IP and FRET assays) and enhances transcription of CDKN3, a downstream KLF7 target gene; PU.1 suppresses preadipocyte differentiation and promotes proliferation, at least partly through this interaction with KLF7.","method":"Co-IP, FRET assay, KLF7 ChIP-seq, CDKN3 reporter assay, PU.1 overexpression/knockdown","journal":"Acta biochimica et biophysica Sinica","confidence":"Medium","confidence_rationale":"Tier 2 — direct physical interaction of PU.1 with KLF7 confirmed by Co-IP and FRET, functional consequence shown","pmids":["36647727"],"is_preprint":false},{"year":2022,"finding":"KLF7 promotes preadipocyte proliferation by transcriptionally activating CDKN3, which drives G1/S transition via Akt phosphorylation; deletion of the KLF7-binding site in the CDKN3 minimal promoter abolishes this effect.","method":"KLF7 ChIP-seq, 5'-truncating promoter mutation analysis, luciferase reporter assay, CDKN3 knockdown/overexpression, flow cytometry, Akt phosphorylation analysis","journal":"Acta biochimica et biophysica Sinica","confidence":"Medium","confidence_rationale":"Tier 2 — ChIP-seq binding site confirmed by promoter mutagenesis and reporter assay, mechanistic pathway validated","pmids":["36269137"],"is_preprint":false}],"current_model":"KLF7 is a zinc-finger Krüppel-like transcription factor that directly binds CACCC/GC-rich promoter and enhancer elements to transcriptionally activate or repress diverse target genes (including p21, p27, TrkA, TrkB/TCaRE3, PFKL, ACADL, IL-6, PKCζ, ASL, HO-1, PDGFB, ALKBH5, SLC1A5, ITGA2, CDKN3, and others) in a cell-type- and context-dependent manner; its activity is modulated by co-activators (MoKA/F-box protein), physical partners (Brn3a, PU.1), post-translational regulation (GSK-3-mediated phosphorylation enabling SCF-Fbxw7-mediated ubiquitylation and degradation), and acetylation of its DNA-binding domain, collectively governing neuronal morphogenesis and axon outgrowth, cell cycle exit, metabolic balance (glycolysis vs. fatty acid oxidation), inflammatory cytokine production, stem/progenitor cell quiescence and pluripotency, and cancer cell proliferation and metastasis."},"narrative":{"teleology":[{"year":2001,"claim":"Whether KLF7 controls cell proliferation was unknown; overexpression in fibroblasts and neuroblastoma cells showed it represses cyclin D1, activates p21, and induces G1 arrest, establishing KLF7 as a cell-cycle-exit factor during differentiation.","evidence":"Forced overexpression in cultured cells with gene expression analysis","pmids":["11336497"],"confidence":"Medium","gaps":["No direct promoter binding demonstrated","Overexpression system may not reflect physiological levels"]},{"year":2005,"claim":"Whether KLF7 functions in neuronal development in vivo was unresolved; Klf7 knockout mice exhibited neurite outgrowth deficits and axonal misprojections, and KLF7 was shown to directly activate p21 and p27 in olfactory neurons, linking Cip/Kip CDK inhibitors to neuronal morphogenesis.","evidence":"Klf7 knockout mice, cotransfection/reporter assays, in situ hybridization, immunoblot","pmids":["15964824"],"confidence":"High","gaps":["Downstream cytoskeletal effectors not identified","Whether p21/p27 are the sole mediators of axon phenotype unclear"]},{"year":2006,"claim":"The transcriptional targets mediating KLF7's axonal outgrowth function and its cooperating partners were unknown; KLF7 was found to activate OMP and L1 promoters via CACCC motifs and to synergize with Brn3a on the TrkA enhancer, with double-knockout mice confirming genetic cooperation for nociceptive neuron survival.","evidence":"Microarray of Klf7−/− mice, reporter assays, EMSA, Brn3a/Klf7 double-KO mice","pmids":["17123745","17011544"],"confidence":"High","gaps":["Structural basis of Brn3a–KLF7 synergy uncharacterized","Genome-wide set of direct KLF7 targets in sensory neurons not mapped"]},{"year":2006,"claim":"How KLF7 transcriptional activity is modulated by cofactors was unknown; the F-box protein MoKA was identified as a nuclear-cytoplasmic shuttling coactivator of KLF7, establishing a regulatory mechanism for tuning KLF7 output.","evidence":"Co-IP, GAL4 chimeric transcriptional assays, CRM1 inhibition","pmids":["16990251"],"confidence":"High","gaps":["Whether MoKA targets KLF7 for ubiquitylation or purely coactivates was not resolved","In vivo relevance of MoKA–KLF7 interaction not tested"]},{"year":2007,"claim":"Whether KLF7 regulates neurotrophic receptor expression beyond TrkA was open; KLF7 was shown to bind TCaRE3 in the TRKB promoter and mediate Ca²⁺/cAMP-stimulated TRKB transcription, broadening KLF7's role to multiple Trk receptors.","evidence":"EMSA, promoter mutagenesis, reporter assays in neurons","pmids":["17553693"],"confidence":"High","gaps":["In vivo requirement for KLF7 in TrkB expression not tested","Whether KLF7 also regulates TrkC unknown"]},{"year":2010,"claim":"KLF7's role was thought to be neuron-specific; loss-of-function studies revealed it is also required for mesodermal differentiation (cardiomyocytes, adipocytes, osteoblasts) and neural stem cell maturation, establishing KLF7 as a broad lineage-commitment factor.","evidence":"shRNA silencing and KO-derived cells across multiple lineage differentiation assays","pmids":["20580711"],"confidence":"High","gaps":["Direct transcriptional targets in mesodermal lineages not identified","Redundancy with other KLFs in these contexts not assessed"]},{"year":2016,"claim":"How KLF7 activity is post-translationally regulated at the DNA-binding level was unknown; acetylation of Lys227/231 in the zinc-finger domain was shown to be required for KLF7-mediated satellite cell quiescence downstream of TGF-β and Notch3 signaling.","evidence":"Acetylation mutagenesis, shRNA knockdown, flow cytometry, pathway inhibition in muscle stem cells","pmids":["26930448"],"confidence":"High","gaps":["Acetyltransferase responsible not identified","Whether acetylation modulates DNA-binding affinity or partner recruitment unclear"]},{"year":2017,"claim":"Whether KLF7 and KLF4 share or antagonize each other's chromatin targets was unknown; ChIP-seq in corneal epithelium showed KLF7 occupies many of the same enhancers as KLF4 with opposing effects, maintaining the progenitor state.","evidence":"ChIP-seq for KLF7 and histone marks, knockdown/overexpression, reporter assays","pmids":["28916725"],"confidence":"High","gaps":["Mechanism of opposing regulation at shared sites not elucidated","Whether this antagonism generalizes to other epithelia untested"]},{"year":2019,"claim":"How KLF7 protein levels are controlled was unresolved; GSK-3-mediated phosphorylation of a Cdc4 phosphodegron was shown to enable SCF-Fbxw7-dependent polyubiquitylation and proteasomal degradation, establishing the primary turnover mechanism for KLF7.","evidence":"Differential proteomics (DiPIUS), Co-IP, ubiquitylation assay, CPD mutagenesis, GSK-3 inhibitor","pmids":["30838725"],"confidence":"High","gaps":["Phosphorylation sites not mapped by mass spectrometry","Physiological contexts where Fbxw7 regulation dominates not defined"]},{"year":2020,"claim":"Whether KLF7 directly coordinates metabolic gene programs was unclear; cardiac-specific KO and overexpression revealed KLF7 simultaneously activates PFKL (glycolysis) and ACADL (fatty acid oxidation), with imbalance causing distinct forms of cardiac hypertrophy.","evidence":"Cardiac-specific KO/OE mice, ChIP-seq/ChIP-qPCR, metabolic flux, genetic rescue","pmids":["36810848"],"confidence":"High","gaps":["How KLF7 differentially regulates two opposing metabolic pathways at the chromatin level unknown","Whether metabolic role extends to skeletal muscle untested"]},{"year":2020,"claim":"KLF7's role in cancer was emerging but mechanistically vague; knockdown in PDAC cells revealed KLF7 sustains ISG expression and DLG3-dependent Golgi integrity required for glycosylation and secretion of cancer-promoting chemokines.","evidence":"shRNA knockdown, xenograft models, Golgi fragmentation imaging, pathway analysis","pmids":["32430335"],"confidence":"High","gaps":["Whether KLF7 directly binds DLG3 or ISG promoters not confirmed by ChIP","Generalizability across cancer types not established"]},{"year":2022,"claim":"Whether KLF7 participates in epigenetic and microRNA regulatory cascades was unexplored; KLF7 was found to activate HDAC4 transcription, which in turn silences miR-148b-3p via histone deacetylation, establishing a KLF7–HDAC4–miRNA axis governing macrophage glucose metabolism.","evidence":"ChIP, dual-luciferase, Seahorse metabolic flux, HDAC4 rescue","pmids":["35439761"],"confidence":"Medium","gaps":["Single-cell-type study; generality of this cascade unknown","No independent validation of KLF7's direct binding to HDAC4 promoter by a second method"]},{"year":2022,"claim":"Upstream regulation of KLF7 itself was poorly defined; NF-κB p65 was shown to bind the KLF7 promoter downstream of GPR40/120 activation by palmitic acid, placing KLF7 within the free-fatty-acid sensing pathway in adipocytes.","evidence":"ChIP for p65 at KLF7 promoter, luciferase assay, GPR blocker experiments in vivo and in vitro","pmids":["35443706"],"confidence":"Medium","gaps":["Whether other transcription factors co-regulate KLF7 promoter activity not explored","Quantitative relationship between FFA concentration and KLF7 levels not established"]},{"year":2023,"claim":"The downstream inflammatory effectors of KLF7 in adipose tissue were incompletely defined; KLF7 was shown to directly activate PKCζ transcription, leading to NF-κB activation and IL-6 production, validated in fat-conditional KO mice.","evidence":"ChIP, luciferase, fat-conditional KO mice, Western blot","pmids":["37342904"],"confidence":"High","gaps":["Whether KLF7-PKCζ axis operates in other inflammatory cell types unknown","Contribution to systemic insulin resistance not directly tested"]},{"year":2023,"claim":"Whether KLF7 participates in oncogenic positive-feedback signaling was unknown; an HMGB1–KLF7–TLR4 loop was identified where KLF7 transactivates both TLR4 and PTK2, amplifying metastatic signaling in HCC.","evidence":"ChIP, luciferase, AAV-mediated KLF7 knockdown, orthotopic xenograft models, pharmacological inhibitor combination","pmids":["37554278"],"confidence":"High","gaps":["Whether disrupting the feedback loop is therapeutically viable not tested in preclinical drug studies","Contribution of PTK2 vs. TLR4 to metastasis not individually quantified"]},{"year":2024,"claim":"KLF7's expanding oncogenic target repertoire was documented through identification of direct transcriptional targets in multiple cancer types — IGF2BP2 via super-enhancer binding in HNSCC, PDGFB in colon adenocarcinoma, ALKBH5 controlling m6A/ferroptosis, SLC1A5 driving tryptophan/serotonin biosynthesis in HCC, ITGA2 maintaining stemness in OSCC, and others — establishing KLF7 as a versatile transcriptional driver of diverse tumor-promoting programs.","evidence":"ChIP-seq, ChIP-qPCR, dual-luciferase, CRISPR/Cas9 SE deactivation, MeRIP, metabolite quantification, xenograft models across multiple labs","pmids":["38443991","38164176","39435423","39648156","40316546","39097779","38221626"],"confidence":"Medium","gaps":["Most cancer targets studied in single cancer types; cross-tissue generality uncertain","No genome-wide systematic identification of direct vs. indirect cancer targets","Therapeutic targeting strategies for KLF7 in cancer unexplored"]},{"year":2025,"claim":"KLF7's neural role was extended beyond peripheral neurons to hippocampal development; conditional KO disrupted neurogenesis and granule cell migration, and Draxin was identified as the key direct transcriptional target mediating this function, with rescue by Draxin overexpression.","evidence":"Emx1-Cre conditional KO mice, transcriptomic profiling, Draxin overexpression rescue, behavioral testing","pmids":["40762575"],"confidence":"High","gaps":["Whether KLF7 regulates Draxin in other brain regions not tested","Behavioral consequences of adult-specific KLF7 loss unknown"]},{"year":2025,"claim":"Whether KLF7 functions in pluripotency was unexplored; KLF7 was shown to replace KLF4 in OSKM reprogramming and to drive naive pluripotency markers in human PSCs, establishing it as a pluripotency-associated factor.","evidence":"Reprogramming assays, CRISPRi silencing, transcriptome analysis, naive pluripotency assays","pmids":["41094238"],"confidence":"High","gaps":["Genome-wide targets of KLF7 in PSCs not mapped by ChIP","Whether KLF7 is required for maintaining naive pluripotency or only for its induction unclear"]},{"year":2025,"claim":"KLF7's upstream epigenetic regulation was clarified: MLL1 deposits H3K4me3 at the KLF7 promoter, and NRF1 directly activates KLF7 transcription, establishing defined input pathways controlling KLF7 expression levels.","evidence":"ChIP for H3K4me3 and MLL1/NRF1 at KLF7 promoter, dual-luciferase, Co-IP for USP7-NRF1","pmids":["41483084","39007840"],"confidence":"Medium","gaps":["Whether MLL1 and NRF1 operate in the same or distinct cell types not resolved","No loss-of-function validation of MLL1 at KLF7 locus in vivo"]},{"year":null,"claim":"Despite the extensive catalog of KLF7 direct targets, several key mechanistic questions remain: the structural basis for KLF7's context-dependent activation vs. repression at different promoters, the identity of acetyltransferases and deacetylases controlling its DNA-binding-domain acetylation, and whether KLF7 can be therapeutically targeted in cancer or metabolic disease.","evidence":"","pmids":[],"confidence":"Low","gaps":["No crystal structure of KLF7 zinc-finger domain bound to DNA","Acetyltransferase for Lys227/231 not identified","No systematic comparison of activating vs. repressive KLF7 complexes at the chromatin level"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[0,2,3,5,8,12,20,28]},{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[0,1,2,3,5,9,12,18,20,28,29]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[0,4,8,20]}],"pathway":[{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[0,2,3,5,9,12,18,20,28,29]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[0,3,6,29]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[9,17,18,19,21]},{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[0,1,40]},{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[9,15,30,35,36]},{"term_id":"R-HSA-1430728","term_label":"Metabolism","supporting_discovery_ids":[12,15,25]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[13,14,19,20,21,25,28]}],"complexes":[],"partners":["BRN3A","MOKA","PU.1","FBXW7","NRF1","MLL1"],"other_free_text":[]},"mechanistic_narrative":"KLF7 is a Krüppel-like zinc-finger transcription factor that binds CACCC/GC-rich elements in promoters and enhancers to activate or repress a broad repertoire of target genes, thereby governing neuronal morphogenesis, metabolic balance, stem/progenitor cell fate, inflammatory signaling, and cancer progression. In the nervous system, KLF7 activates p21/p27, TrkA (synergistically with Brn3a), TrkB, L1/OMP, AHNAK/AHNAK2, and Draxin to drive neurite outgrowth, axon guidance, and hippocampal neurogenesis, as shown by knockout and conditional-knockout mouse models with rescue experiments [PMID:15964824, PMID:17011544, PMID:40762575, PMID:38924469]. Beyond neurons, KLF7 directly transactivates metabolic genes (PFKL, ACADL) to control the glycolysis–fatty acid oxidation balance in cardiomyocytes, activates PKCζ/IL-6 and CCL2 in adipocytes downstream of TLR4/NF-κB and GPR40/120 signaling, maintains satellite cell quiescence through acetylation-dependent DNA binding (Lys227/231), sustains corneal progenitor identity by antagonizing KLF4, and can replace KLF4 in reprogramming to naive pluripotency [PMID:36810848, PMID:37342904, PMID:26930448, PMID:28916725, PMID:41094238]. KLF7 protein turnover is regulated by GSK-3-mediated phosphorylation of a Cdc4 phosphodegron, which triggers SCF-Fbxw7-dependent polyubiquitylation and proteasomal degradation [PMID:30838725]."},"prefetch_data":{"uniprot":{"accession":"O75840","full_name":"Krueppel-like factor 7","aliases":["Ubiquitous krueppel-like factor"],"length_aa":302,"mass_kda":33.4,"function":"Transcriptional factor (PubMed:16339272, PubMed:9774444). Plays a critical role in neuronal morphogenesis and survival of sensory neurons (By similarity). Represses the corneal epithelium differentiation (PubMed:28916725). Also acts as a metabolic regulator, by modulating insulin sensitivity in pancreatic beta cells and skeletal muscle cells (PubMed:16339272). Inhibits transcriptional inducers of adipogenesis and has a repressive role in the expression of several adipokines, including leptin (PubMed:16339272)","subcellular_location":"Nucleus","url":"https://www.uniprot.org/uniprotkb/O75840/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/KLF7","classification":"Not Classified","n_dependent_lines":129,"n_total_lines":1208,"dependency_fraction":0.10678807947019868},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/KLF7","total_profiled":1310},"omim":[{"mim_id":"618976","title":"MYOCARDIN-INDUCED SMOOTH MUSCLE LONG NONCODING RNA, INDUCER OF DIFFERENTIATION; MYOSLID","url":"https://www.omim.org/entry/618976"},{"mim_id":"615575","title":"NEURONOPATHY, DISTAL HEREDITARY MOTOR, AUTOSOMAL DOMINANT 6; HMND6","url":"https://www.omim.org/entry/615575"},{"mim_id":"608533","title":"F-BOX ONLY PROTEIN 38; FBXO38","url":"https://www.omim.org/entry/608533"},{"mim_id":"604865","title":"KLF TRANSCRIPTION FACTOR 7; KLF7","url":"https://www.omim.org/entry/604865"},{"mim_id":"602253","title":"KLF TRANSCRIPTION FACTOR 4; KLF4","url":"https://www.omim.org/entry/602253"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Nucleoplasm","reliability":"Supported"},{"location":"Cytosol","reliability":"Additional"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/KLF7"},"hgnc":{"alias_symbol":["UKLF"],"prev_symbol":[]},"alphafold":{"accession":"O75840","domains":[{"cath_id":"3.30.160.60","chopping":"247-302","consensus_level":"medium","plddt":81.8137,"start":247,"end":302},{"cath_id":"3.30.160","chopping":"217-246","consensus_level":"medium","plddt":82.7403,"start":217,"end":246}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/O75840","model_url":"https://alphafold.ebi.ac.uk/files/AF-O75840-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-O75840-F1-predicted_aligned_error_v6.png","plddt_mean":53.38},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=KLF7","jax_strain_url":"https://www.jax.org/strain/search?query=KLF7"},"sequence":{"accession":"O75840","fasta_url":"https://rest.uniprot.org/uniprotkb/O75840.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/O75840/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/O75840"}},"corpus_meta":[{"pmid":"15964824","id":"PMC_15964824","title":"Transcription 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loss of KLF7 in mice causes neurite outgrowth deficits and axonal misprojections, demonstrating its role in neuronal morphogenesis through regulation of Cip/Kip CDK inhibitors that also promote cytoskeletal dynamics.\",\n      \"method\": \"Cotransfection/reporter assays, in situ hybridization, immunoblot, Klf7 knockout mice\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — KO mouse phenotype with defined molecular targets, replicated by multiple orthogonal methods in a highly cited paper\",\n      \"pmids\": [\"15964824\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"KLF7 overexpression in fibroblasts and neuroblastoma cells represses cyclin D1, activates p21, and causes G1 growth arrest, consistent with a role in cell cycle exit during neuronal differentiation.\",\n      \"method\": \"Forced overexpression in cultured cells, gene expression analysis\",\n      \"journal\": \"Developmental biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — single-lab overexpression with phenotypic readout but no direct promoter binding demonstrated here\",\n      \"pmids\": [\"11336497\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"KLF7 directly activates the promoters of OMP (olfactory marker protein) and the adhesion molecule L1 by binding to CACCC motifs, linking KLF7 to axonal growth and cell adhesion programs in olfactory sensory neurons.\",\n      \"method\": \"DNA microarray of Klf7-/- mice, cell transfection reporter assays, promoter binding analysis\",\n      \"journal\": \"Gene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genome-wide expression profiling combined with direct promoter transactivation assays\",\n      \"pmids\": [\"17123745\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"KLF7 and Brn3a synergistically activate the TrkA enhancer in vitro, and cooperation between these two transcription factors is required for endogenous TrkA gene expression and survival of nociceptive sensory neurons in vivo.\",\n      \"method\": \"In vitro reporter assays, Brn3a/Klf7 double-knockout mice, immunohistochemistry\",\n      \"journal\": \"Developmental biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — genetic epistasis with double-mutant rescue plus in vitro transactivation assays\",\n      \"pmids\": [\"17011544\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"MoKA, an F-box-containing protein, interacts with KLF7 and stimulates its transcriptional activity; MoKA shuttles between nucleus and cytoplasm via distinct NLS and NES sequences including a CRM1-dependent leucine-rich export signal.\",\n      \"method\": \"Co-IP, forced expression of fusion proteins, pharmacological inhibition of CRM1, GAL4 chimeric transcriptional assays\",\n      \"journal\": \"Nucleic acids research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal interaction demonstrated with multiple functional localization and transactivation assays\",\n      \"pmids\": [\"16990251\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"KLF7 binds a novel regulatory element (TCaRE3) in the TRKB promoter, which is required for Ca2+- and cAMP-stimulated TRKB transcription in neurons; this element is 100% conserved between mouse and human TRKB promoters.\",\n      \"method\": \"Electrophoretic mobility shift assay (EMSA), promoter mutagenesis, reporter assays in neurons\",\n      \"journal\": \"Molecular and cellular neurosciences\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — direct DNA binding demonstrated by EMSA, confirmed by mutagenesis, functional consequence shown in neuronal Ca2+ signaling\",\n      \"pmids\": [\"17553693\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"KLF7 is required for in vitro differentiation of neuroectodermal (PC12, neural stem cells) and mesodermal (ES cell-derived cardiomyocytes, MEF adipogenic/osteogenic) lineages; shRNA silencing correlates with downregulation of MAP2 and TrkA in PC12 cells and BLBP/FABP7 in neural stem cells.\",\n      \"method\": \"shRNA-mediated silencing, KO mice, differentiation assays, immunostaining\",\n      \"journal\": \"Experimental cell research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — loss-of-function with defined molecular and cellular phenotypes across multiple lineages\",\n      \"pmids\": [\"20580711\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"KLF7 functions as a mediator of TGF-β and Notch3 signaling to maintain satellite cell quiescence; knockdown of KLF7 promotes satellite cell activation, and acetylation of Lys227 and/or Lys231 in the KLF7 DNA-binding domain is required for its quiescence-regulating activity.\",\n      \"method\": \"shRNA knockdown, overexpression, flow cytometry, acetylation mutagenesis, Notch/TGF-β pathway inhibition\",\n      \"journal\": \"Stem cells\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods including PTM mutagenesis and pathway epistasis in muscle stem cells\",\n      \"pmids\": [\"26930448\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"KLF7 promotes the corneal progenitor cell state and antagonizes KLF4-mediated corneal epithelial differentiation; ChIP-seq showed KLF7 binds corneal epithelial enhancers enriched for KLF motifs and occupies many of the same targets as KLF4 with opposing effects.\",\n      \"method\": \"ChIP-seq (H3K4me3, H3K4me1, H3K27ac), KLF7 knockdown/overexpression, reporter assays\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — genome-wide ChIP-seq combined with functional loss- and gain-of-function experiments\",\n      \"pmids\": [\"28916725\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"KLF7 transcriptionally activates IL-6 expression in adipocytes by directly binding the IL-6 promoter region, acting downstream of the TLR4/NF-κB pathway activated by palmitic acid.\",\n      \"method\": \"Luciferase reporter assay, siRNA knockdown, Western blot, qRT-PCR\",\n      \"journal\": \"Mediators of inflammation\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — direct promoter transactivation shown by luciferase assay; pathway placement by upstream knockdown experiments\",\n      \"pmids\": [\"30598636\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"KLF7 is ubiquitylated and targeted for proteasomal degradation by the SCF-Fbxw7 E3 ubiquitin ligase complex; this requires GSK-3-mediated phosphorylation of a Cdc4 phosphodegron (CPD) in KLF7. Fbxw7 overexpression down-regulates p21Cip1, a transcriptional target of KLF7.\",\n      \"method\": \"DiPIUS differential proteomics, Co-IP, polyubiquitylation assay, CPD mutagenesis, GSK-3 inhibitor treatment, protein stability assay\",\n      \"journal\": \"Genes to cells\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — substrate identification by mass spectrometry confirmed by interaction, ubiquitylation assays, and mutagenesis of the degron\",\n      \"pmids\": [\"30838725\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"KLF7 transcriptionally activates argininosuccinate lyase (ASL), promoting polyamine biosynthesis via the urea cycle and supporting glioma cell proliferation and tumorigenesis.\",\n      \"method\": \"KLF7 knockdown/overexpression, reporter assays, metabolite analysis, xenograft tumor models\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — single lab with transcriptional activation assay and functional rescue, but no direct ChIP binding shown\",\n      \"pmids\": [\"31018905\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"KLF7 simultaneously transcriptionally targets PFKL (rate-limiting glycolysis enzyme) and ACADL (key fatty acid oxidation enzyme), and cardiac-specific KLF7 knockout or overexpression induces distinct forms of cardiac hypertrophy by shifting metabolic balance; knockdown of PFKL or overexpression of ACADL partially rescues KLF7-deficient hypertrophy.\",\n      \"method\": \"Cardiac-specific KO and overexpression mice, ChIP-seq/ChIP-qPCR, metabolic flux analysis, genetic rescue experiments\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — direct target identification by ChIP, cardiac-specific KO/OE models, and epistasis rescue experiments\",\n      \"pmids\": [\"36810848\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"KLF7 knockdown in pancreatic ductal adenocarcinoma (PDAC) cells inhibits IFN-stimulated gene (ISG) expression and downregulates DLG3, causing Golgi complex fragmentation and reduced protein glycosylation, leading to decreased secretion of cancer-promoting chemokines and inhibited tumor growth and metastasis.\",\n      \"method\": \"shRNA knockdown, cell culture, xenograft mouse models, pathway analysis\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple downstream pathway readouts with in vivo validation and mechanistic specificity\",\n      \"pmids\": [\"32430335\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"KLF7 transcriptionally activates VPS35, which then interacts with CCDC85C (confirmed by Co-IP) to activate β-catenin signaling, promoting HCC cell proliferation and invasion.\",\n      \"method\": \"ChIP-qPCR, luciferase reporter assays, Co-IP, β-catenin inhibitor rescue, xenograft models\",\n      \"journal\": \"Cell & bioscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct transcriptional target confirmed by ChIP and luciferase, protein interaction by Co-IP, functional rescue with inhibitor\",\n      \"pmids\": [\"33858520\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"KLF7 binds the HDAC4 promoter to activate HDAC4 transcription; HDAC4 then reduces histone acetylation at the miR-148b promoter to suppress miR-148b-3p, thereby promoting NCOR1 transcription and limiting glucose metabolic reprogramming in macrophages.\",\n      \"method\": \"Dual-luciferase assay, ChIP assay, Seahorse metabolic flux analysis, HDAC4 rescue experiments\",\n      \"journal\": \"Gerontology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct promoter binding by ChIP and luciferase, epigenetic mechanism, metabolic phenotype quantified\",\n      \"pmids\": [\"35439761\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"KLF7 promotes osteoclast differentiation by suppressing Heme oxygenase-1 (HO-1) expression; ChIP assay confirmed KLF7 binds the HO-1 promoter, and HO-1 overexpression reversed the KLF7-mediated promotion of osteoclastogenesis.\",\n      \"method\": \"ChIP assay, TRAP staining, Western blot, rescue experiments with HO-1 agonist Hemin\",\n      \"journal\": \"Frontiers in genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct promoter binding demonstrated by ChIP with functional rescue\",\n      \"pmids\": [\"35419025\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"p65 (NF-κB subunit) transcriptionally upregulates KLF7 expression downstream of GPR40/120 activation by palmitic acid; ChIP assay confirmed p65 binding to the KLF7 promoter, establishing the GPRs/NF-κB/KLF7 pathway in adipocytes and liver cells.\",\n      \"method\": \"Luciferase reporter gene assay, ChIP assay, GPR blocker experiments in vivo and in vitro\",\n      \"journal\": \"Nutrition & diabetes\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct p65 binding to KLF7 promoter by ChIP, confirmed with pharmacological blockade in vivo\",\n      \"pmids\": [\"35443706\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"KLF7 transcriptionally activates PKCζ expression in adipocytes (confirmed by luciferase reporter and ChIP assays), leading to activation of the NF-κB pathway and IL-6 production; fat-conditional KLF7 KO mice show decreased PKCζ, p-IκB, p-p65, and IL-6 in adipose tissue.\",\n      \"method\": \"Luciferase reporter assay, ChIP assay, fat-conditional KO mice, Western blot\",\n      \"journal\": \"FASEB journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — direct transcriptional target confirmed by ChIP and luciferase, validated in vivo with conditional KO mice\",\n      \"pmids\": [\"37342904\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"HMGB1 upregulates KLF7 expression through the TLR4/RAGE-PI3K-AKT-NF-κB pathway; KLF7 in turn transactivates TLR4 and PTK2 (FAK), forming an HMGB1-KLF7-TLR4 positive feedback loop that promotes HCC metastasis.\",\n      \"method\": \"Luciferase reporter assay, ChIP assay, AAV-mediated KLF7 knockdown, orthotopic xenograft models, pharmacological inhibitor combination\",\n      \"journal\": \"Theranostics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — direct promoter binding by ChIP and luciferase, positive feedback loop validated in vivo with multiple models\",\n      \"pmids\": [\"37554278\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"KLF7 directly transcriptionally activates IGF2BP2 by binding to its promoter and super-enhancer regions in head and neck squamous cell carcinoma, as demonstrated by ChIP-qPCR and dual-luciferase reporter assays; CRISPR/Cas9-mediated SE deactivation reduced IGF2BP2 transcription.\",\n      \"method\": \"H3K27Ac ChIP-seq, ChIP-qPCR, dual-luciferase reporter assay, CRISPR/Cas9 SE deactivation, orthotopic xenograft models\",\n      \"journal\": \"Journal of experimental & clinical cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — genome-wide ChIP-seq, direct binding confirmed by ChIP-qPCR and luciferase, CRISPR validation\",\n      \"pmids\": [\"38443991\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"KLF7 directly binds the PDGFB promoter (binding site TGGGTGGAG) to transcriptionally activate PDGFB secretion, which then promotes colon adenocarcinoma progression through PDGFRβ-activated MAPK/ERK, PI3K/AKT, and JAK/STAT3 pathways.\",\n      \"method\": \"ChIP assay, luciferase reporter assay, in vitro and in vivo tumor models, pharmacological PDGFRβ inhibition with sunitinib\",\n      \"journal\": \"International journal of biological sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct promoter binding by ChIP, pathway activation confirmed with inhibitors\",\n      \"pmids\": [\"38164176\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"KLF7 transcriptionally activates ALKBH5 (an m6A demethylase), which decreases m6A modification on ACSL4 mRNA, reducing ACSL4 protein levels and inhibiting ferroptosis in human microvascular endothelial cells exposed to ox-LDL.\",\n      \"method\": \"Dual-luciferase assay, ChIP assay, MeRIP (m6A immunoprecipitation), ferroptosis marker analysis\",\n      \"journal\": \"Cytotechnology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct KLF7-ALKBH5 promoter binding by ChIP and luciferase, epitranscriptomic mechanism by MeRIP\",\n      \"pmids\": [\"39435423\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"USP7 stabilizes NRF1 protein by deubiquitination (confirmed by Co-IP); NRF1 then binds the KLF7 promoter to enhance its transcription (confirmed by ChIP and dual-luciferase assay), thereby protecting neurons from inflammation and apoptosis.\",\n      \"method\": \"Co-IP, ChIP assay, dual-luciferase reporter assay, Western blot, cell viability assays\",\n      \"journal\": \"Neurological research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct protein interaction by Co-IP, transcriptional regulation of KLF7 by NRF1 confirmed by ChIP and luciferase\",\n      \"pmids\": [\"39007840\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"KLF7 promotes neuroblastoma differentiation by directly binding the promoters of AHNAK, AHNAK2, and GDPD5 (confirmed by ChIP), upregulating their expression and altering GTPase activity; KLF7 acts independently of and cooperatively with the retinoic acid pathway.\",\n      \"method\": \"ChIP assay, promoter reporter assays, neuroblastoma differentiation assays, enhancer profiling\",\n      \"journal\": \"The FEBS journal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct promoter binding by ChIP with functional differentiation phenotype\",\n      \"pmids\": [\"38924469\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"KLF7 transcriptionally activates SLC1A5 (confirmed by ChIP binding to SLC1A5 promoter), promoting tryptophan uptake and serotonin biosynthesis, which supports HCC cell proliferation and metastasis.\",\n      \"method\": \"ChIP assay, KLF7 knockdown/overexpression, metabolite measurements (tryptophan, serotonin), xenograft tumor models\",\n      \"journal\": \"Journal of cellular and molecular medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct promoter binding by ChIP, metabolic consequence quantified, in vivo validation\",\n      \"pmids\": [\"39648156\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"KLF7 directly binds the CCL2 promoter region and transcriptionally activates CCL2 in bone marrow adipocytes, a process triggered by palmitic acid via GPR40/120 signaling, promoting prostate cancer cell proliferation and invasion.\",\n      \"method\": \"ChIP assay, luciferase reporter assay, conditioned medium experiments, Co-culture assays, in vivo HFD mouse model\",\n      \"journal\": \"BMC cancer\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct promoter binding by ChIP and luciferase, in vivo validation in obesity model\",\n      \"pmids\": [\"38221626\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"KLF7 directly binds the miR-139-5p promoter to repress its transcription (confirmed by ChIP and dual-luciferase assay), thereby upregulating miR-139-5p's target TPD52 and enhancing colorectal cancer cell invasion and migration.\",\n      \"method\": \"ChIP assay, dual-luciferase reporter assay, siRNA knockdown, in vivo xenograft\",\n      \"journal\": \"Cancer biology & therapy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct promoter binding by ChIP and luciferase with functional consequences\",\n      \"pmids\": [\"39097779\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"KLF7 maintains stemness of oral squamous cell carcinoma by directly transcriptionally activating ITGA2 (confirmed by ChIP-seq and dual-luciferase assay); ITGA2 activates PI3K-AKT, MAPK, and Hippo signaling upon binding type I collagen.\",\n      \"method\": \"ChIP-seq, dual-luciferase assay, tumor sphere formation, flow cytometry, in vivo limiting dilution tumorigenicity, ITGA2 inhibitor xenograft experiments\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — ChIP-seq with direct promoter validation, multiple functional assays in vitro and in vivo\",\n      \"pmids\": [\"40316546\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"KLF7 orchestrates hippocampal development by transcriptionally activating Draxin (a neural chemorepellent); KLF7 conditional knockout in hippocampal progenitors disrupts neurogenesis and neuronal migration, and Draxin overexpression rescues granule cell migration defects.\",\n      \"method\": \"Conditional KO mice (Emx1-Cre;Klf7F/F), transcriptomic profiling, Draxin overexpression rescue, behavioral testing\",\n      \"journal\": \"Development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — conditional KO with defined molecular target and in vivo rescue experiment\",\n      \"pmids\": [\"40762575\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"KLF7 represses MKNK2 transcription (confirmed by ChIP and dual-luciferase assay), thereby inhibiting HIF-1 signaling and M1 microglia polarization after ischemic stroke; KLF7 overexpression in vivo ameliorates brain damage after MCAO/R.\",\n      \"method\": \"ChIP assay, dual-luciferase reporter assay, lentiviral overexpression/knockdown in rats, MCAO/R model\",\n      \"journal\": \"Brain and behavior\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct promoter binding confirmed, pathway epistasis validated in vivo\",\n      \"pmids\": [\"40923147\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"KLF7 directly transcriptionally activates PPP1R14C by binding its promoter; PPP1R14C inhibits PP1 phosphatase, maintaining CDK1 hyperphosphorylation and promoting lung squamous cell carcinoma proliferation and invasion.\",\n      \"method\": \"ChIP assay, luciferase reporter assay, PP1-CDK1 interaction analysis, CDK1 inhibitor rescue\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct promoter binding by ChIP and luciferase, mechanistic cascade confirmed pharmacologically\",\n      \"pmids\": [\"41699008\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"KLF7 is expressed in human pluripotent stem cells and can replace KLF4 in OSKM reprogramming to generate iPSCs; KLF7 forced expression in conventional hPSCs induces naive pluripotency markers and enables efficient chemical resetting, while CRISPRi-mediated KLF7 silencing reduces resetting efficiency.\",\n      \"method\": \"Transcription factor-mediated reprogramming, CRISPRi silencing, transcriptome analysis, naive pluripotency assays\",\n      \"journal\": \"EMBO reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — gain- and loss-of-function in human PSCs with defined functional outcomes in reprogramming\",\n      \"pmids\": [\"41094238\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"MLL1 promotes KLF7 transcription through H3K4me3 histone modification at the KLF7 promoter; KLF7 in turn transcriptionally activates USP7 (confirmed by ChIP and dual-luciferase assay), forming a MLL1/KLF7/USP7 axis that facilitates invasion of fibroblast-like synoviocytes in rheumatoid arthritis.\",\n      \"method\": \"ChIP assay, dual-luciferase assay, shRNA knockdown, Transwell invasion assay\",\n      \"journal\": \"In vitro cellular & developmental biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — epigenetic writer (MLL1) identified, downstream transcriptional activation of USP7 by KLF7 confirmed by ChIP and luciferase\",\n      \"pmids\": [\"41483084\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"KLF7 promotes KLF7 target gene LOX transcription in head and neck squamous cell carcinoma, and LOX-driven extracellular matrix crosslinking creates a stiff microenvironment that recruits tumor-associated macrophages and disrupts CD8+ T cell killing.\",\n      \"method\": \"ChIP assay (implied by direct transcriptional activation), in vitro and in vivo tumor models, macrophage recruitment assay\",\n      \"journal\": \"Cancer letters\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct transcriptional target identified with functional consequence in tumor immune microenvironment in vivo\",\n      \"pmids\": [\"41482204\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"KLF7 transcriptionally activates LIMK1 (confirmed by ChIP and dual-luciferase assay); LIMK1 then interacts with and phosphorylates SRPK1 (confirmed by GST pull-down and Co-IP), amplifying inflammatory responses in alveolar epithelial cells under LPS-induced injury.\",\n      \"method\": \"ChIP assay, dual-luciferase reporter assay, GST pull-down, Co-IP, ELISA\",\n      \"journal\": \"Central-European journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct promoter binding confirmed, protein-protein interaction of LIMK1/SRPK1 validated by pull-down and Co-IP\",\n      \"pmids\": [\"42028385\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"KLF7 promotes IL-6 generation in brown adipocytes downstream of beta-3 adrenergic receptor (ADRB3) signaling; KLF7 knockdown largely blunts ADRB3 agonist-induced IL-6 expression in primary brown adipocytes.\",\n      \"method\": \"ADRB3 agonist treatment, cold stimulation in vivo, KLF7 knockdown in primary brown adipocytes, IL-6 quantification\",\n      \"journal\": \"Heliyon\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — pathway placement demonstrated by knockdown with physiological stimuli, but no direct promoter binding shown\",\n      \"pmids\": [\"37025783\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"GNA14 stimulates KLF7 expression in endometrial cancer cells, and KLF7 in turn transcriptionally activates hyaluronan synthase 2 (HAS2); knockdown of HAS2 reversed the oncogenic effects of KLF7 overexpression.\",\n      \"method\": \"RNA sequencing, Western blot, qRT-PCR, xenograft tumor model, KLF7/HAS2 knockdown rescue\",\n      \"journal\": \"BMC cancer\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — downstream target identified by RNA-seq with functional rescue, but direct promoter binding not confirmed by ChIP\",\n      \"pmids\": [\"33892667\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"KLF7 directly binds the PDE4 promoter to transcriptionally repress its expression (confirmed by ChIP and dual-luciferase assay) in granulosa cells, and PDE4 overexpression reverses the KLF7-mediated protection against DHT-induced apoptosis in a PCOS cell model.\",\n      \"method\": \"ChIP assay, dual-luciferase reporter assay, overexpression/knockdown, CCK-8, TUNEL, EdU assays\",\n      \"journal\": \"Endocrine connections\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct promoter binding by ChIP and luciferase, functional rescue by target overexpression\",\n      \"pmids\": [\"41071839\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"PU.1 directly binds KLF7 (confirmed by Co-IP and FRET assays) and enhances transcription of CDKN3, a downstream KLF7 target gene; PU.1 suppresses preadipocyte differentiation and promotes proliferation, at least partly through this interaction with KLF7.\",\n      \"method\": \"Co-IP, FRET assay, KLF7 ChIP-seq, CDKN3 reporter assay, PU.1 overexpression/knockdown\",\n      \"journal\": \"Acta biochimica et biophysica Sinica\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct physical interaction of PU.1 with KLF7 confirmed by Co-IP and FRET, functional consequence shown\",\n      \"pmids\": [\"36647727\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"KLF7 promotes preadipocyte proliferation by transcriptionally activating CDKN3, which drives G1/S transition via Akt phosphorylation; deletion of the KLF7-binding site in the CDKN3 minimal promoter abolishes this effect.\",\n      \"method\": \"KLF7 ChIP-seq, 5'-truncating promoter mutation analysis, luciferase reporter assay, CDKN3 knockdown/overexpression, flow cytometry, Akt phosphorylation analysis\",\n      \"journal\": \"Acta biochimica et biophysica Sinica\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — ChIP-seq binding site confirmed by promoter mutagenesis and reporter assay, mechanistic pathway validated\",\n      \"pmids\": [\"36269137\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"KLF7 is a zinc-finger Krüppel-like transcription factor that directly binds CACCC/GC-rich promoter and enhancer elements to transcriptionally activate or repress diverse target genes (including p21, p27, TrkA, TrkB/TCaRE3, PFKL, ACADL, IL-6, PKCζ, ASL, HO-1, PDGFB, ALKBH5, SLC1A5, ITGA2, CDKN3, and others) in a cell-type- and context-dependent manner; its activity is modulated by co-activators (MoKA/F-box protein), physical partners (Brn3a, PU.1), post-translational regulation (GSK-3-mediated phosphorylation enabling SCF-Fbxw7-mediated ubiquitylation and degradation), and acetylation of its DNA-binding domain, collectively governing neuronal morphogenesis and axon outgrowth, cell cycle exit, metabolic balance (glycolysis vs. fatty acid oxidation), inflammatory cytokine production, stem/progenitor cell quiescence and pluripotency, and cancer cell proliferation and metastasis.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"KLF7 is a Krüppel-like zinc-finger transcription factor that binds CACCC/GC-rich elements in promoters and enhancers to activate or repress a broad repertoire of target genes, thereby governing neuronal morphogenesis, metabolic balance, stem/progenitor cell fate, inflammatory signaling, and cancer progression. In the nervous system, KLF7 activates p21/p27, TrkA (synergistically with Brn3a), TrkB, L1/OMP, AHNAK/AHNAK2, and Draxin to drive neurite outgrowth, axon guidance, and hippocampal neurogenesis, as shown by knockout and conditional-knockout mouse models with rescue experiments [PMID:15964824, PMID:17011544, PMID:40762575, PMID:38924469]. Beyond neurons, KLF7 directly transactivates metabolic genes (PFKL, ACADL) to control the glycolysis–fatty acid oxidation balance in cardiomyocytes, activates PKCζ/IL-6 and CCL2 in adipocytes downstream of TLR4/NF-κB and GPR40/120 signaling, maintains satellite cell quiescence through acetylation-dependent DNA binding (Lys227/231), sustains corneal progenitor identity by antagonizing KLF4, and can replace KLF4 in reprogramming to naive pluripotency [PMID:36810848, PMID:37342904, PMID:26930448, PMID:28916725, PMID:41094238]. KLF7 protein turnover is regulated by GSK-3-mediated phosphorylation of a Cdc4 phosphodegron, which triggers SCF-Fbxw7-dependent polyubiquitylation and proteasomal degradation [PMID:30838725].\",\n  \"teleology\": [\n    {\n      \"year\": 2001,\n      \"claim\": \"Whether KLF7 controls cell proliferation was unknown; overexpression in fibroblasts and neuroblastoma cells showed it represses cyclin D1, activates p21, and induces G1 arrest, establishing KLF7 as a cell-cycle-exit factor during differentiation.\",\n      \"evidence\": \"Forced overexpression in cultured cells with gene expression analysis\",\n      \"pmids\": [\"11336497\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No direct promoter binding demonstrated\", \"Overexpression system may not reflect physiological levels\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Whether KLF7 functions in neuronal development in vivo was unresolved; Klf7 knockout mice exhibited neurite outgrowth deficits and axonal misprojections, and KLF7 was shown to directly activate p21 and p27 in olfactory neurons, linking Cip/Kip CDK inhibitors to neuronal morphogenesis.\",\n      \"evidence\": \"Klf7 knockout mice, cotransfection/reporter assays, in situ hybridization, immunoblot\",\n      \"pmids\": [\"15964824\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Downstream cytoskeletal effectors not identified\", \"Whether p21/p27 are the sole mediators of axon phenotype unclear\"]\n    },\n    {\n      \"year\": 2006,\n      \"claim\": \"The transcriptional targets mediating KLF7's axonal outgrowth function and its cooperating partners were unknown; KLF7 was found to activate OMP and L1 promoters via CACCC motifs and to synergize with Brn3a on the TrkA enhancer, with double-knockout mice confirming genetic cooperation for nociceptive neuron survival.\",\n      \"evidence\": \"Microarray of Klf7−/− mice, reporter assays, EMSA, Brn3a/Klf7 double-KO mice\",\n      \"pmids\": [\"17123745\", \"17011544\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of Brn3a–KLF7 synergy uncharacterized\", \"Genome-wide set of direct KLF7 targets in sensory neurons not mapped\"]\n    },\n    {\n      \"year\": 2006,\n      \"claim\": \"How KLF7 transcriptional activity is modulated by cofactors was unknown; the F-box protein MoKA was identified as a nuclear-cytoplasmic shuttling coactivator of KLF7, establishing a regulatory mechanism for tuning KLF7 output.\",\n      \"evidence\": \"Co-IP, GAL4 chimeric transcriptional assays, CRM1 inhibition\",\n      \"pmids\": [\"16990251\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether MoKA targets KLF7 for ubiquitylation or purely coactivates was not resolved\", \"In vivo relevance of MoKA–KLF7 interaction not tested\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Whether KLF7 regulates neurotrophic receptor expression beyond TrkA was open; KLF7 was shown to bind TCaRE3 in the TRKB promoter and mediate Ca²⁺/cAMP-stimulated TRKB transcription, broadening KLF7's role to multiple Trk receptors.\",\n      \"evidence\": \"EMSA, promoter mutagenesis, reporter assays in neurons\",\n      \"pmids\": [\"17553693\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"In vivo requirement for KLF7 in TrkB expression not tested\", \"Whether KLF7 also regulates TrkC unknown\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"KLF7's role was thought to be neuron-specific; loss-of-function studies revealed it is also required for mesodermal differentiation (cardiomyocytes, adipocytes, osteoblasts) and neural stem cell maturation, establishing KLF7 as a broad lineage-commitment factor.\",\n      \"evidence\": \"shRNA silencing and KO-derived cells across multiple lineage differentiation assays\",\n      \"pmids\": [\"20580711\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct transcriptional targets in mesodermal lineages not identified\", \"Redundancy with other KLFs in these contexts not assessed\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"How KLF7 activity is post-translationally regulated at the DNA-binding level was unknown; acetylation of Lys227/231 in the zinc-finger domain was shown to be required for KLF7-mediated satellite cell quiescence downstream of TGF-β and Notch3 signaling.\",\n      \"evidence\": \"Acetylation mutagenesis, shRNA knockdown, flow cytometry, pathway inhibition in muscle stem cells\",\n      \"pmids\": [\"26930448\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Acetyltransferase responsible not identified\", \"Whether acetylation modulates DNA-binding affinity or partner recruitment unclear\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Whether KLF7 and KLF4 share or antagonize each other's chromatin targets was unknown; ChIP-seq in corneal epithelium showed KLF7 occupies many of the same enhancers as KLF4 with opposing effects, maintaining the progenitor state.\",\n      \"evidence\": \"ChIP-seq for KLF7 and histone marks, knockdown/overexpression, reporter assays\",\n      \"pmids\": [\"28916725\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism of opposing regulation at shared sites not elucidated\", \"Whether this antagonism generalizes to other epithelia untested\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"How KLF7 protein levels are controlled was unresolved; GSK-3-mediated phosphorylation of a Cdc4 phosphodegron was shown to enable SCF-Fbxw7-dependent polyubiquitylation and proteasomal degradation, establishing the primary turnover mechanism for KLF7.\",\n      \"evidence\": \"Differential proteomics (DiPIUS), Co-IP, ubiquitylation assay, CPD mutagenesis, GSK-3 inhibitor\",\n      \"pmids\": [\"30838725\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Phosphorylation sites not mapped by mass spectrometry\", \"Physiological contexts where Fbxw7 regulation dominates not defined\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Whether KLF7 directly coordinates metabolic gene programs was unclear; cardiac-specific KO and overexpression revealed KLF7 simultaneously activates PFKL (glycolysis) and ACADL (fatty acid oxidation), with imbalance causing distinct forms of cardiac hypertrophy.\",\n      \"evidence\": \"Cardiac-specific KO/OE mice, ChIP-seq/ChIP-qPCR, metabolic flux, genetic rescue\",\n      \"pmids\": [\"36810848\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How KLF7 differentially regulates two opposing metabolic pathways at the chromatin level unknown\", \"Whether metabolic role extends to skeletal muscle untested\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"KLF7's role in cancer was emerging but mechanistically vague; knockdown in PDAC cells revealed KLF7 sustains ISG expression and DLG3-dependent Golgi integrity required for glycosylation and secretion of cancer-promoting chemokines.\",\n      \"evidence\": \"shRNA knockdown, xenograft models, Golgi fragmentation imaging, pathway analysis\",\n      \"pmids\": [\"32430335\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether KLF7 directly binds DLG3 or ISG promoters not confirmed by ChIP\", \"Generalizability across cancer types not established\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Whether KLF7 participates in epigenetic and microRNA regulatory cascades was unexplored; KLF7 was found to activate HDAC4 transcription, which in turn silences miR-148b-3p via histone deacetylation, establishing a KLF7–HDAC4–miRNA axis governing macrophage glucose metabolism.\",\n      \"evidence\": \"ChIP, dual-luciferase, Seahorse metabolic flux, HDAC4 rescue\",\n      \"pmids\": [\"35439761\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Single-cell-type study; generality of this cascade unknown\", \"No independent validation of KLF7's direct binding to HDAC4 promoter by a second method\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Upstream regulation of KLF7 itself was poorly defined; NF-κB p65 was shown to bind the KLF7 promoter downstream of GPR40/120 activation by palmitic acid, placing KLF7 within the free-fatty-acid sensing pathway in adipocytes.\",\n      \"evidence\": \"ChIP for p65 at KLF7 promoter, luciferase assay, GPR blocker experiments in vivo and in vitro\",\n      \"pmids\": [\"35443706\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether other transcription factors co-regulate KLF7 promoter activity not explored\", \"Quantitative relationship between FFA concentration and KLF7 levels not established\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"The downstream inflammatory effectors of KLF7 in adipose tissue were incompletely defined; KLF7 was shown to directly activate PKCζ transcription, leading to NF-κB activation and IL-6 production, validated in fat-conditional KO mice.\",\n      \"evidence\": \"ChIP, luciferase, fat-conditional KO mice, Western blot\",\n      \"pmids\": [\"37342904\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether KLF7-PKCζ axis operates in other inflammatory cell types unknown\", \"Contribution to systemic insulin resistance not directly tested\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Whether KLF7 participates in oncogenic positive-feedback signaling was unknown; an HMGB1–KLF7–TLR4 loop was identified where KLF7 transactivates both TLR4 and PTK2, amplifying metastatic signaling in HCC.\",\n      \"evidence\": \"ChIP, luciferase, AAV-mediated KLF7 knockdown, orthotopic xenograft models, pharmacological inhibitor combination\",\n      \"pmids\": [\"37554278\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether disrupting the feedback loop is therapeutically viable not tested in preclinical drug studies\", \"Contribution of PTK2 vs. TLR4 to metastasis not individually quantified\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"KLF7's expanding oncogenic target repertoire was documented through identification of direct transcriptional targets in multiple cancer types — IGF2BP2 via super-enhancer binding in HNSCC, PDGFB in colon adenocarcinoma, ALKBH5 controlling m6A/ferroptosis, SLC1A5 driving tryptophan/serotonin biosynthesis in HCC, ITGA2 maintaining stemness in OSCC, and others — establishing KLF7 as a versatile transcriptional driver of diverse tumor-promoting programs.\",\n      \"evidence\": \"ChIP-seq, ChIP-qPCR, dual-luciferase, CRISPR/Cas9 SE deactivation, MeRIP, metabolite quantification, xenograft models across multiple labs\",\n      \"pmids\": [\"38443991\", \"38164176\", \"39435423\", \"39648156\", \"40316546\", \"39097779\", \"38221626\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Most cancer targets studied in single cancer types; cross-tissue generality uncertain\", \"No genome-wide systematic identification of direct vs. indirect cancer targets\", \"Therapeutic targeting strategies for KLF7 in cancer unexplored\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"KLF7's neural role was extended beyond peripheral neurons to hippocampal development; conditional KO disrupted neurogenesis and granule cell migration, and Draxin was identified as the key direct transcriptional target mediating this function, with rescue by Draxin overexpression.\",\n      \"evidence\": \"Emx1-Cre conditional KO mice, transcriptomic profiling, Draxin overexpression rescue, behavioral testing\",\n      \"pmids\": [\"40762575\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether KLF7 regulates Draxin in other brain regions not tested\", \"Behavioral consequences of adult-specific KLF7 loss unknown\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Whether KLF7 functions in pluripotency was unexplored; KLF7 was shown to replace KLF4 in OSKM reprogramming and to drive naive pluripotency markers in human PSCs, establishing it as a pluripotency-associated factor.\",\n      \"evidence\": \"Reprogramming assays, CRISPRi silencing, transcriptome analysis, naive pluripotency assays\",\n      \"pmids\": [\"41094238\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Genome-wide targets of KLF7 in PSCs not mapped by ChIP\", \"Whether KLF7 is required for maintaining naive pluripotency or only for its induction unclear\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"KLF7's upstream epigenetic regulation was clarified: MLL1 deposits H3K4me3 at the KLF7 promoter, and NRF1 directly activates KLF7 transcription, establishing defined input pathways controlling KLF7 expression levels.\",\n      \"evidence\": \"ChIP for H3K4me3 and MLL1/NRF1 at KLF7 promoter, dual-luciferase, Co-IP for USP7-NRF1\",\n      \"pmids\": [\"41483084\", \"39007840\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether MLL1 and NRF1 operate in the same or distinct cell types not resolved\", \"No loss-of-function validation of MLL1 at KLF7 locus in vivo\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"Despite the extensive catalog of KLF7 direct targets, several key mechanistic questions remain: the structural basis for KLF7's context-dependent activation vs. repression at different promoters, the identity of acetyltransferases and deacetylases controlling its DNA-binding-domain acetylation, and whether KLF7 can be therapeutically targeted in cancer or metabolic disease.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No crystal structure of KLF7 zinc-finger domain bound to DNA\", \"Acetyltransferase for Lys227/231 not identified\", \"No systematic comparison of activating vs. repressive KLF7 complexes at the chromatin level\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [0, 2, 3, 5, 8, 12, 20, 28]},\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [0, 1, 2, 3, 5, 9, 12, 18, 20, 28, 29]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [0, 4, 8, 20]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [0, 2, 3, 5, 9, 12, 18, 20, 28, 29]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [0, 3, 6, 29]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [9, 17, 18, 19, 21]},\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [0, 1, 40]},\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [9, 15, 30, 35, 36]},\n      {\"term_id\": \"R-HSA-1430728\", \"supporting_discovery_ids\": [12, 15, 25]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [13, 14, 19, 20, 21, 25, 28]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\n      \"Brn3a\",\n      \"MoKA\",\n      \"PU.1\",\n      \"FBXW7\",\n      \"NRF1\",\n      \"MLL1\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}