{"gene":"CELF4","run_date":"2026-06-09T22:57:18","timeline":{"discoveries":[{"year":2004,"finding":"CELF4 contains two adjacent RNA recognition motifs (RRM1 and RRM2) near the N-terminus and one RRM (RRM3) near the C-terminus; either RRM1 or RRM2 is necessary and sufficient for binding MSE RNA from the cardiac troponin T (cTNT) alternative exon region, and RRM2 plus an additional 66 amino acids of the divergent domain are as effective as full-length protein in activating MSE-dependent splicing in vivo.","method":"Comparative deletion analysis, RNA binding assays, in vivo splicing activity assays with truncation/deletion mutants of CELF4","journal":"Nucleic Acids Research","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro RNA binding assays combined with in vivo splicing activity assays using systematic deletion mutagenesis; single lab but multiple orthogonal methods","pmids":["14973222"],"is_preprint":false},{"year":2004,"finding":"CELF4 promotes inclusion of the cardiac troponin T (cTNT) alternative exon 5 in vivo by binding conserved intronic muscle-specific elements (MSEs) flanking the exon.","method":"In vivo splicing assay, RNA binding assay using MSE RNA substrate","journal":"Nucleic Acids Research","confidence":"High","confidence_rationale":"Tier 1 / Moderate — direct in vitro RNA binding and in vivo splicing assays with defined substrates and mutagenesis; single lab, multiple orthogonal methods","pmids":["14973222"],"is_preprint":false},{"year":2007,"finding":"Disruption of Brunol4 (CELF4) in mice leads to down-regulation of at least four RNA molecules encoding proteins involved in neuroexcitability, particularly in the mutant hippocampus, resulting in limbic and tonic-clonic seizures.","method":"Mouse knockout/heterozygous mutant model (frequent-flyer, Ff), gene expression profiling, EEG","journal":"PLoS Genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — loss-of-function mouse model with defined seizure phenotype and gene expression profiling; single lab but multiple methods including EEG","pmids":["17677002"],"is_preprint":false},{"year":2011,"finding":"Selective deletion of Celf4 from cerebral cortex and hippocampus excitatory neurons (but not inhibitory neurons) is sufficient to lower seizure threshold and promote spontaneous convulsions; CELF4 is expressed predominantly in excitatory neurons and specifically regulates excitatory (but not inhibitory) neurotransmission as measured by patch-clamp recordings of cortical layer V pyramidal neurons.","method":"Conditional knockout mice (spatial/temporal), immunostaining, patch-clamp electrophysiology, inhibitory neuron reporter","journal":"Genes, Brain, and Behavior","confidence":"High","confidence_rationale":"Tier 2 / Strong — conditional KO with cell-type specificity, electrophysiology, and reporter imaging; multiple orthogonal methods establishing pathway position","pmids":["21745337"],"is_preprint":false},{"year":2012,"finding":"CELF4 binds to Scn8a mRNA (encoding Nav1.6 sodium channel); CELF4 deficiency results in elevated Nav1.6 protein expression at the axon initial segment (AIS), increased persistent sodium current (INaP), hyperpolarizing shift in voltage-dependent activation, lower action potential initiation threshold, and larger AP gain in cortical pyramidal neurons.","method":"RNA immunoprecipitation (CELF4 binds Scn8a mRNA), patch-clamp electrophysiology on brain slices, immunostaining of AIS Nav1.6, Celf4 knockout mouse model","journal":"The Journal of Physiology","confidence":"High","confidence_rationale":"Tier 2 / Strong — direct mRNA binding demonstrated, protein localization by immunostaining, and functional electrophysiology in KO neurons; multiple orthogonal methods","pmids":["23090952"],"is_preprint":false},{"year":2012,"finding":"CELF4 binds to at least 15–20% of the transcriptome with striking specificity for the mRNA 3' untranslated region; in its absence, target mRNA stability and availability for translation are impaired (polysome fractionation shows altered translation), and mRNAs accumulate abnormally in neuropil, particularly those encoding regulators of synaptic plasticity and transmission.","method":"CLIP-seq (CELF4 target identification), polysome profiling, neuropil vs. cell body transcriptome analysis, Celf4 knockout mice","journal":"PLoS Genetics","confidence":"High","confidence_rationale":"Tier 1 / Strong — CLIP-seq for direct binding targets, polysome profiling for translational control, subcellular fractionation; multiple orthogonal methods in single rigorous study","pmids":["23209433"],"is_preprint":false},{"year":2013,"finding":"During mouse retinal development, CELF4 protein localizes dynamically: early in development it is restricted to nuclei of newly differentiating retinal ganglion cells (RGCs) and initial segments of RGC axons, then postnatally shifts to predominantly cytoplasmic localization in amacrine and bipolar cells and is enriched in synaptic boutons of rod bipolar cells, suggesting roles in both nuclear RNA processing and cytoplasmic mRNA localization/translation.","method":"In situ hybridization (ISH), immunofluorescence (IF) during retinal development, cell-type marker co-labeling","journal":"Gene Expression Patterns","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — direct localization by ISH and IF across developmental stages with cell-type markers; single lab, two complementary imaging methods","pmids":["23932931"],"is_preprint":false},{"year":2016,"finding":"A polymorphism in CELF4 (rs1786814) modifies anthracycline-associated cardiomyopathy risk, and analysis of healthy human hearts showed that the GG genotype is associated with co-existence of more than one TNNT2 (cardiac troponin T) splicing variant, suggesting CELF4 regulates developmentally regulated TNNT2 splicing in human cardiac tissue.","method":"Genome-wide association study with replication, TNNT2 splicing variant analysis in healthy human heart samples stratified by rs1786814 genotype","journal":"Journal of Clinical Oncology","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — splicing variant analysis in human heart tissue correlated with genotype; GWAS plus tissue-level splicing analysis, but mechanism is correlative rather than direct functional assay","pmids":["26811534"],"is_preprint":false},{"year":2022,"finding":"Knockdown of CELF4 in the prefrontal cortex (PFC) of mice using AAV-shCELF4 reduces dendritic spine number and induces depression-like behaviors in the chronic social defeat stress model.","method":"AAV-mediated shRNA knockdown in PFC, spine morphology quantification, behavioral assays (depression-like behavior)","journal":"Biochemical and Biophysical Research Communications","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — clean in vivo KD with defined cellular (spine density) and behavioral phenotype; single lab, single publication","pmids":["35306363"],"is_preprint":false},{"year":2023,"finding":"CELF4 is expressed in the marginal zone and subplate of developing prenatal neocortex (compartments enriched in initial synaptogenesis); forebrain-specific deletion of Celf4 disrupts the balance of subplate synapses in a sex-specific fashion, and CELF4 target mRNAs encode synaptic proteins and neurodevelopmental risk genes whose translation is controlled during fetal cortical development.","method":"Polysome profiling coupled with snRNA-seq on human fetal cortex, Celf4 conditional knockout (forebrain-specific), immunostaining, synaptic analysis","journal":"Nature Communications","confidence":"High","confidence_rationale":"Tier 2 / Strong — polysome profiling + snRNA-seq + conditional KO with cellular phenotype; multiple orthogonal methods across human and mouse tissue","pmids":["37758766"],"is_preprint":false},{"year":2023,"finding":"In pancreatic neuroendocrine tumor (PanNET) cells, CELF4 silencing alters mTOR signaling pathway activity and reduces in vivo xenograft tumor growth, and CELF4 modulation changes splicing event profiles; CELF4 is upregulated in PanNETs compared to non-tumoral adjacent tissue.","method":"siRNA/shRNA silencing in PanNET cell lines, RNA-seq (splicing and gene expression), in vivo xenograft experiments, functional proliferation assays, everolimus combination assays","journal":"Molecular Therapy: Nucleic Acids","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — in vitro and in vivo functional assays with RNA-seq; single lab, pathway placement via functional genomics without direct biochemical reconstitution","pmids":["38187140"],"is_preprint":false},{"year":2025,"finding":"Heterozygous loss-of-function or missense variants in the N-terminal RRM domain region of CELF4 (essential for RNA-binding and splicing activity) in humans cause a neurodevelopmental disorder featuring intellectual disability, seizures, and obesity, confirming that the RNA-binding activity of CELF4's N-terminal RRMs is essential for normal neurodevelopment.","method":"Exome/genome sequencing in 15 patients with CELF4 variants, genotype-phenotype correlation, domain mapping to known RNA-binding/splicing regions","journal":"European Journal of Human Genetics","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — human genetics with domain-function mapping based on prior biochemical data; no new in vitro functional assay, but 15 patients provide moderate preponderance","pmids":["40108438"],"is_preprint":false},{"year":2025,"finding":"Conditional knockout of Celf4 in adult capsaicin-sensitive DRG neurons results in reduced rheobase and neuronal hyperexcitability (patch-clamp), and behavioral mechanical and thermal hypersensitivity, establishing CELF4 as a negative regulator of sensory neuron excitability in the peripheral nervous system.","method":"Conditional KO mouse (DRG-specific), patch-clamp electrophysiology on dissociated DRG neurons, behavioral assays (mechanical/thermal thresholds, capsaicin/NGF-evoked hypersensitivity)","journal":"Neurobiology of Pain","confidence":"High","confidence_rationale":"Tier 2 / Strong — cell-type-specific conditional KO combined with electrophysiology and multiple behavioral readouts; multiple orthogonal methods","pmids":["41089293"],"is_preprint":false},{"year":2026,"finding":"CELF4 overexpression in the spinal cord of chronic constriction injury (CCI) mice (via AAV) reduces mechanical and thermal hypersensitivity and downregulates TRPV1 and COX-2 protein expression; conversely, CELF4 knockdown rescues TRPV1 and COX-2 expression, identifying CELF4 as a suppressive regulator of these pain mediators in neuropathic pain pathways.","method":"AAV-mediated CELF4 overexpression and knockdown in CCI mouse spinal cord, behavioral assays, Western blot for TRPV1 and COX-2","journal":"Journal of Molecular Neuroscience","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — gain- and loss-of-function in vivo with defined molecular and behavioral readouts; single lab, single publication","pmids":["42207381"],"is_preprint":false},{"year":2026,"finding":"Celf4 haploinsufficiency in mice alters transmission at the endbulb of Held synapse in the cochlear nucleus: synaptic vesicle release is subtly reduced, bushy cell excitability is dampened (hyperpolarized resting membrane potential), and spike kinetics are faster due to enhanced fast-inactivating A-type potassium current (IA); hair cell ribbon synapses are largely unaffected.","method":"Celf4 heterozygous mouse model, auditory brainstem responses (ABR), patch-clamp electrophysiology of bushy cells, hair cell and SGN counts, ribbon synapse analysis","journal":"Cellular and Molecular Neurobiology","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — electrophysiology and ABR in haploinsufficient mice with defined synaptic phenotype; single lab, multiple electrophysiology methods","pmids":["42029780"],"is_preprint":false}],"current_model":"CELF4 is a neuronal RNA-binding protein that binds mRNA 3' UTRs (and intronic MSEs for splicing targets) via its N-terminal RRM1/RRM2 domains, regulating mRNA stability, translation, and alternative splicing (notably of cardiac troponin T/TNNT2); in the CNS it is expressed predominantly in excitatory neurons where it limits translation of synaptic mRNAs (including Scn8a/Nav1.6), suppresses excitatory neurotransmission and neuronal hyperexcitability, controls dendritic spine density, and regulates initial synapse formation in the prenatal neocortex, with loss of CELF4 function causing seizures, synaptic dysregulation, and neurodevelopmental disorder in both mice and humans."},"narrative":{"mechanistic_narrative":"CELF4 is a neuronal RNA-binding protein that controls gene expression at the levels of alternative splicing, mRNA stability, and translation, and functions as a brake on neuronal excitability across the central and peripheral nervous systems [PMID:23209433, PMID:21745337, PMID:41089293]. Sequence-specific RNA binding is mediated by its N-terminal RNA recognition motifs: either RRM1 or RRM2 is sufficient to bind intronic muscle-specific elements (MSEs) flanking the cardiac troponin T (cTNT/TNNT2) alternative exon, and this activity drives MSE-dependent exon inclusion [PMID:14973222], with the same locus regulated in human cardiac tissue [PMID:26811534]. Transcriptome-wide, CELF4 binds a large fraction of mRNAs with strong preference for 3' UTRs, and its loss impairs target mRNA stability and translational availability and causes synaptic-transmission transcripts to mislocalize to the neuropil [PMID:23209433]. In the brain it is expressed predominantly in excitatory neurons, where it specifically restrains excitatory neurotransmission; one key target is Scn8a mRNA, and CELF4 deficiency elevates Nav1.6 protein at the axon initial segment, increases persistent sodium current, and lowers the action potential threshold [PMID:21745337, PMID:23090952]. Loss of CELF4 lowers seizure threshold and produces spontaneous seizures in mice [PMID:17677002, PMID:21745337], reduces dendritic spine density [PMID:35306363], and disrupts subplate synapse balance during prenatal neocortical development [PMID:37758766]; the same negative regulation of excitability operates in peripheral sensory neurons, where CELF4 suppresses DRG and spinal pain-pathway excitability and pain-mediator expression [PMID:41089293, PMID:42207381]. Heterozygous loss-of-function and N-terminal RRM missense variants in CELF4 cause a human neurodevelopmental disorder with intellectual disability, seizures, and obesity, establishing that RRM-dependent RNA binding is essential for normal neurodevelopment [PMID:40108438].","teleology":[{"year":2004,"claim":"Established the molecular basis of CELF4 RNA recognition and its function as a splicing activator by mapping which domains bind RNA and drive exon inclusion.","evidence":"Systematic deletion/truncation mutagenesis with in vitro RNA binding and in vivo splicing assays on the cTNT MSE substrate","pmids":["14973222"],"confidence":"High","gaps":["Defined activity on a single splicing substrate (cTNT); transcriptome-wide splicing scope not addressed","No structural model of the RRM–MSE complex","Did not address neuronal targets or function"]},{"year":2007,"claim":"Connected CELF4 loss to a neurological phenotype, showing it regulates neuroexcitability-related transcripts whose dysregulation produces seizures.","evidence":"Brunol4/Celf4 mutant (frequent-flyer) mouse model with expression profiling and EEG","pmids":["17677002"],"confidence":"Medium","gaps":["Down-regulated transcripts were correlative, not shown to be direct binding targets","Cell type responsible for the phenotype not resolved","Mechanism linking RNA changes to excitability undefined"]},{"year":2011,"claim":"Localized CELF4 function to excitatory neurons, demonstrating that loss there is sufficient for seizures and selectively dysregulates excitatory transmission.","evidence":"Cell-type-specific conditional knockout mice with patch-clamp electrophysiology and inhibitory-neuron reporter imaging","pmids":["21745337"],"confidence":"High","gaps":["Direct molecular target driving altered excitatory transmission not yet identified at this stage","Did not distinguish translational vs splicing mechanisms"]},{"year":2012,"claim":"Identified a direct mechanistic effector of the excitability phenotype by showing CELF4 binds Scn8a mRNA and controls Nav1.6 channel availability at the axon initial segment.","evidence":"RNA immunoprecipitation, immunostaining of AIS Nav1.6, and patch-clamp electrophysiology in knockout cortical neurons","pmids":["23090952"],"confidence":"High","gaps":["Whether regulation is via translation, localization, or stability of Scn8a mRNA not fully resolved","Other channel targets contributing to hyperexcitability not enumerated"]},{"year":2012,"claim":"Defined CELF4's transcriptome-wide binding mode and post-transcriptional mechanism, showing 3' UTR preference and roles in mRNA stability, translation, and subcellular localization.","evidence":"CLIP-seq target identification, polysome profiling, and neuropil-vs-cell-body transcriptome analysis in knockout mice","pmids":["23209433"],"confidence":"High","gaps":["Precise binding motif/structural determinants of 3' UTR selectivity not defined","Causal hierarchy among stability, translation, and localization effects unresolved","Co-factors mediating these effects unknown"]},{"year":2013,"claim":"Revealed dynamic, developmentally staged subcellular localization, supporting dual nuclear (processing) and cytoplasmic (localization/translation) roles.","evidence":"In situ hybridization and immunofluorescence across retinal development with cell-type markers","pmids":["23932931"],"confidence":"Medium","gaps":["Localization is descriptive; functional consequences in retina not tested","Signals controlling the nuclear-to-cytoplasmic shift unknown"]},{"year":2016,"claim":"Extended the splicing function to human tissue, correlating a CELF4 polymorphism with TNNT2 splice-variant composition in human heart.","evidence":"GWAS with replication plus genotype-stratified TNNT2 splicing analysis in healthy human heart","pmids":["26811534"],"confidence":"Medium","gaps":["Correlative; no direct functional assay of the variant on splicing","Mechanism of cardiomyopathy-risk modification not established"]},{"year":2022,"claim":"Linked CELF4 to dendritic spine maintenance and affective behavior, broadening its role beyond excitability control.","evidence":"AAV-shRNA knockdown in mouse prefrontal cortex with spine quantification and depression-like behavioral assays","pmids":["35306363"],"confidence":"Medium","gaps":["Target mRNAs mediating spine loss not identified","Single lab, single study"]},{"year":2023,"claim":"Placed CELF4 in prenatal cortical synaptogenesis, controlling translation of synaptic and neurodevelopmental-risk mRNAs and subplate synapse balance.","evidence":"Polysome profiling with snRNA-seq on human fetal cortex plus forebrain-specific conditional knockout with synaptic analysis","pmids":["37758766"],"confidence":"High","gaps":["Mechanism of sex-specific synaptic effects unexplained","Individual causal target transcripts for the synaptic phenotype not pinned down"]},{"year":2023,"claim":"Identified a non-neuronal oncogenic context, implicating CELF4 in mTOR signaling and splicing regulation in pancreatic neuroendocrine tumors.","evidence":"siRNA/shRNA silencing in PanNET cell lines with RNA-seq, proliferation assays, and xenograft growth","pmids":["38187140"],"confidence":"Medium","gaps":["Direct CELF4 targets driving mTOR changes not defined","Whether tumor effect is via splicing or other post-transcriptional control unresolved"]},{"year":2025,"claim":"Established CELF4 as a human disease gene, showing N-terminal RRM variants cause a neurodevelopmental disorder and confirming RNA-binding activity is essential for neurodevelopment.","evidence":"Exome/genome sequencing in 15 patients with genotype-phenotype correlation and domain mapping","pmids":["40108438"],"confidence":"Medium","gaps":["No new functional assay of patient variants","Mechanism linking RRM dysfunction to obesity phenotype not established"]},{"year":2025,"claim":"Generalized CELF4's role as an excitability brake to the peripheral nervous system, showing it suppresses sensory neuron firing and pain behavior.","evidence":"DRG-specific conditional knockout with patch-clamp electrophysiology and mechanical/thermal behavioral assays","pmids":["41089293"],"confidence":"High","gaps":["Direct target transcripts in DRG neurons not identified","Relationship to the cortical Scn8a mechanism not tested"]},{"year":2026,"claim":"Defined CELF4-regulated pain mediators, showing it suppresses spinal TRPV1 and COX-2 expression and modulates neuropathic pain.","evidence":"AAV-mediated overexpression and knockdown in CCI mouse spinal cord with behavior and Western blot","pmids":["42207381"],"confidence":"Medium","gaps":["Whether TRPV1/COX-2 mRNAs are direct CELF4 binding targets not shown","Single lab, single study"]},{"year":2026,"claim":"Demonstrated CELF4 dosage sensitivity at a central auditory synapse, affecting vesicle release, intrinsic excitability, and A-type potassium current.","evidence":"Celf4 haploinsufficient mice with ABR and patch-clamp electrophysiology of cochlear nucleus bushy cells","pmids":["42029780"],"confidence":"Medium","gaps":["Molecular targets underlying altered IA and release not identified","Single lab study"]},{"year":null,"claim":"How CELF4 selects its 3' UTR targets at the structural/motif level and the causal hierarchy by which it controls stability, translation, and localization to set neuronal excitability remain unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No structural model of RRM–RNA recognition defining target specificity","Co-factors/effectors mediating mRNA stability and translational control unknown","Direct target transcripts linking CELF4 loss to PNS, auditory, and affective phenotypes largely uncatalogued"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0003723","term_label":"RNA binding","supporting_discovery_ids":[0,1,4,5]},{"term_id":"GO:0045182","term_label":"translation regulator activity","supporting_discovery_ids":[5,9]},{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[0,1]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[6]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[6]}],"pathway":[{"term_id":"R-HSA-8953854","term_label":"Metabolism of RNA","supporting_discovery_ids":[0,1,5]},{"term_id":"R-HSA-112316","term_label":"Neuronal System","supporting_discovery_ids":[3,4,12]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[9]}],"complexes":[],"partners":[],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q9BZC1","full_name":"CUGBP Elav-like family member 4","aliases":["Bruno-like protein 4","CUG-BP- and ETR-3-like factor 4","RNA-binding protein BRUNOL-4"],"length_aa":486,"mass_kda":52.0,"function":"RNA-binding protein implicated in the regulation of pre-mRNA alternative splicing. Mediates exon inclusion and/or exclusion in pre-mRNA that are subject to tissue-specific and developmentally regulated alternative splicing. Specifically activates exon 5 inclusion of cardiac isoforms of TNNT2 during heart remodeling at the juvenile to adult transition. Promotes exclusion of both the smooth muscle (SM) and non-muscle (NM) exons in actinin pre-mRNAs. Activates the splicing of MAPT/Tau exon 10. Binds to muscle-specific splicing enhancer (MSE) intronic sites flanking the alternative exon 5 of TNNT2 pre-mRNA","subcellular_location":"Nucleus; Cytoplasm","url":"https://www.uniprot.org/uniprotkb/Q9BZC1/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/CELF4","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/CELF4","total_profiled":1310},"omim":[{"mim_id":"612681","title":"CUGBP- AND ELAV-LIKE FAMILY, MEMBER 6; CELF6","url":"https://www.omim.org/entry/612681"},{"mim_id":"612680","title":"CUGBP- AND ELAV-LIKE FAMILY, MEMBER 5; CELF5","url":"https://www.omim.org/entry/612680"},{"mim_id":"612679","title":"CUGBP- AND ELAV-LIKE FAMILY, MEMBER 4; CELF4","url":"https://www.omim.org/entry/612679"},{"mim_id":"612678","title":"CUGBP- AND ELAV-LIKE FAMILY, MEMBER 3; CELF3","url":"https://www.omim.org/entry/612678"},{"mim_id":"602538","title":"CUGBP- AND ELAV-LIKE FAMILY, MEMBER 2; CELF2","url":"https://www.omim.org/entry/602538"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Nucleoplasm","reliability":"Supported"}],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"brain","ntpm":94.3},{"tissue":"pituitary gland","ntpm":26.9}],"url":"https://www.proteinatlas.org/search/CELF4"},"hgnc":{"alias_symbol":[],"prev_symbol":["BRUNOL4"]},"alphafold":{"accession":"Q9BZC1","domains":[{"cath_id":"3.30.70.330","chopping":"54-131","consensus_level":"high","plddt":90.0249,"start":54,"end":131},{"cath_id":"3.30.70.330","chopping":"148-236","consensus_level":"high","plddt":87.8181,"start":148,"end":236},{"cath_id":"3.30.70.330","chopping":"422-475","consensus_level":"high","plddt":73.0706,"start":422,"end":475}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9BZC1","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q9BZC1-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q9BZC1-F1-predicted_aligned_error_v6.png","plddt_mean":61.47},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=CELF4","jax_strain_url":"https://www.jax.org/strain/search?query=CELF4"},"sequence":{"accession":"Q9BZC1","fasta_url":"https://rest.uniprot.org/uniprotkb/Q9BZC1.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q9BZC1/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9BZC1"}},"corpus_meta":[{"pmid":"26811534","id":"PMC_26811534","title":"CELF4 Variant and Anthracycline-Related Cardiomyopathy: A Children's Oncology Group Genome-Wide Association Study.","date":"2016","source":"Journal of clinical oncology : official journal of the American Society of Clinical Oncology","url":"https://pubmed.ncbi.nlm.nih.gov/26811534","citation_count":107,"is_preprint":false},{"pmid":"23209433","id":"PMC_23209433","title":"CELF4 regulates translation and local abundance of a vast set of mRNAs, including genes associated with regulation of synaptic function.","date":"2012","source":"PLoS genetics","url":"https://pubmed.ncbi.nlm.nih.gov/23209433","citation_count":96,"is_preprint":false},{"pmid":"17677002","id":"PMC_17677002","title":"Complex seizure disorder caused by Brunol4 deficiency in mice.","date":"2007","source":"PLoS genetics","url":"https://pubmed.ncbi.nlm.nih.gov/17677002","citation_count":50,"is_preprint":false},{"pmid":"14973222","id":"PMC_14973222","title":"ETR-3 and CELF4 protein domains required for RNA binding and splicing activity in vivo.","date":"2004","source":"Nucleic acids research","url":"https://pubmed.ncbi.nlm.nih.gov/14973222","citation_count":37,"is_preprint":false},{"pmid":"21745337","id":"PMC_21745337","title":"Etiology of a genetically complex seizure disorder in Celf4 mutant mice.","date":"2011","source":"Genes, brain, and behavior","url":"https://pubmed.ncbi.nlm.nih.gov/21745337","citation_count":36,"is_preprint":false},{"pmid":"23090952","id":"PMC_23090952","title":"Aberrant sodium channel activity in the complex seizure disorder of Celf4 mutant mice.","date":"2012","source":"The Journal of physiology","url":"https://pubmed.ncbi.nlm.nih.gov/23090952","citation_count":28,"is_preprint":false},{"pmid":"37758766","id":"PMC_37758766","title":"Celf4 controls mRNA translation underlying synaptic development in the prenatal mammalian neocortex.","date":"2023","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/37758766","citation_count":24,"is_preprint":false},{"pmid":"28407444","id":"PMC_28407444","title":"Familial 18q12.2 deletion supports the role of RNA-binding protein CELF4 in autism spectrum disorders.","date":"2017","source":"American journal of medical genetics. Part A","url":"https://pubmed.ncbi.nlm.nih.gov/28407444","citation_count":18,"is_preprint":false},{"pmid":"12438720","id":"PMC_12438720","title":"Identification and characterization of murine Brunol4, a new member of the elav/bruno family.","date":"2002","source":"Cytogenetic and genome research","url":"https://pubmed.ncbi.nlm.nih.gov/12438720","citation_count":15,"is_preprint":false},{"pmid":"38187140","id":"PMC_38187140","title":"Altered CELF4 splicing factor enhances pancreatic neuroendocrine tumors aggressiveness influencing mTOR and everolimus response.","date":"2023","source":"Molecular therapy. 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either RRM1 or RRM2 is necessary and sufficient for binding MSE RNA from the cardiac troponin T (cTNT) alternative exon region, and RRM2 plus an additional 66 amino acids of the divergent domain are as effective as full-length protein in activating MSE-dependent splicing in vivo.\",\n      \"method\": \"Comparative deletion analysis, RNA binding assays, in vivo splicing activity assays with truncation/deletion mutants of CELF4\",\n      \"journal\": \"Nucleic Acids Research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro RNA binding assays combined with in vivo splicing activity assays using systematic deletion mutagenesis; single lab but multiple orthogonal methods\",\n      \"pmids\": [\"14973222\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"CELF4 promotes inclusion of the cardiac troponin T (cTNT) alternative exon 5 in vivo by binding conserved intronic muscle-specific elements (MSEs) flanking the exon.\",\n      \"method\": \"In vivo splicing assay, RNA binding assay using MSE RNA substrate\",\n      \"journal\": \"Nucleic Acids Research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — direct in vitro RNA binding and in vivo splicing assays with defined substrates and mutagenesis; single lab, multiple orthogonal methods\",\n      \"pmids\": [\"14973222\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Disruption of Brunol4 (CELF4) in mice leads to down-regulation of at least four RNA molecules encoding proteins involved in neuroexcitability, particularly in the mutant hippocampus, resulting in limbic and tonic-clonic seizures.\",\n      \"method\": \"Mouse knockout/heterozygous mutant model (frequent-flyer, Ff), gene expression profiling, EEG\",\n      \"journal\": \"PLoS Genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — loss-of-function mouse model with defined seizure phenotype and gene expression profiling; single lab but multiple methods including EEG\",\n      \"pmids\": [\"17677002\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Selective deletion of Celf4 from cerebral cortex and hippocampus excitatory neurons (but not inhibitory neurons) is sufficient to lower seizure threshold and promote spontaneous convulsions; CELF4 is expressed predominantly in excitatory neurons and specifically regulates excitatory (but not inhibitory) neurotransmission as measured by patch-clamp recordings of cortical layer V pyramidal neurons.\",\n      \"method\": \"Conditional knockout mice (spatial/temporal), immunostaining, patch-clamp electrophysiology, inhibitory neuron reporter\",\n      \"journal\": \"Genes, Brain, and Behavior\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — conditional KO with cell-type specificity, electrophysiology, and reporter imaging; multiple orthogonal methods establishing pathway position\",\n      \"pmids\": [\"21745337\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"CELF4 binds to Scn8a mRNA (encoding Nav1.6 sodium channel); CELF4 deficiency results in elevated Nav1.6 protein expression at the axon initial segment (AIS), increased persistent sodium current (INaP), hyperpolarizing shift in voltage-dependent activation, lower action potential initiation threshold, and larger AP gain in cortical pyramidal neurons.\",\n      \"method\": \"RNA immunoprecipitation (CELF4 binds Scn8a mRNA), patch-clamp electrophysiology on brain slices, immunostaining of AIS Nav1.6, Celf4 knockout mouse model\",\n      \"journal\": \"The Journal of Physiology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — direct mRNA binding demonstrated, protein localization by immunostaining, and functional electrophysiology in KO neurons; multiple orthogonal methods\",\n      \"pmids\": [\"23090952\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"CELF4 binds to at least 15–20% of the transcriptome with striking specificity for the mRNA 3' untranslated region; in its absence, target mRNA stability and availability for translation are impaired (polysome fractionation shows altered translation), and mRNAs accumulate abnormally in neuropil, particularly those encoding regulators of synaptic plasticity and transmission.\",\n      \"method\": \"CLIP-seq (CELF4 target identification), polysome profiling, neuropil vs. cell body transcriptome analysis, Celf4 knockout mice\",\n      \"journal\": \"PLoS Genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — CLIP-seq for direct binding targets, polysome profiling for translational control, subcellular fractionation; multiple orthogonal methods in single rigorous study\",\n      \"pmids\": [\"23209433\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"During mouse retinal development, CELF4 protein localizes dynamically: early in development it is restricted to nuclei of newly differentiating retinal ganglion cells (RGCs) and initial segments of RGC axons, then postnatally shifts to predominantly cytoplasmic localization in amacrine and bipolar cells and is enriched in synaptic boutons of rod bipolar cells, suggesting roles in both nuclear RNA processing and cytoplasmic mRNA localization/translation.\",\n      \"method\": \"In situ hybridization (ISH), immunofluorescence (IF) during retinal development, cell-type marker co-labeling\",\n      \"journal\": \"Gene Expression Patterns\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — direct localization by ISH and IF across developmental stages with cell-type markers; single lab, two complementary imaging methods\",\n      \"pmids\": [\"23932931\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"A polymorphism in CELF4 (rs1786814) modifies anthracycline-associated cardiomyopathy risk, and analysis of healthy human hearts showed that the GG genotype is associated with co-existence of more than one TNNT2 (cardiac troponin T) splicing variant, suggesting CELF4 regulates developmentally regulated TNNT2 splicing in human cardiac tissue.\",\n      \"method\": \"Genome-wide association study with replication, TNNT2 splicing variant analysis in healthy human heart samples stratified by rs1786814 genotype\",\n      \"journal\": \"Journal of Clinical Oncology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — splicing variant analysis in human heart tissue correlated with genotype; GWAS plus tissue-level splicing analysis, but mechanism is correlative rather than direct functional assay\",\n      \"pmids\": [\"26811534\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"Knockdown of CELF4 in the prefrontal cortex (PFC) of mice using AAV-shCELF4 reduces dendritic spine number and induces depression-like behaviors in the chronic social defeat stress model.\",\n      \"method\": \"AAV-mediated shRNA knockdown in PFC, spine morphology quantification, behavioral assays (depression-like behavior)\",\n      \"journal\": \"Biochemical and Biophysical Research Communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — clean in vivo KD with defined cellular (spine density) and behavioral phenotype; single lab, single publication\",\n      \"pmids\": [\"35306363\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"CELF4 is expressed in the marginal zone and subplate of developing prenatal neocortex (compartments enriched in initial synaptogenesis); forebrain-specific deletion of Celf4 disrupts the balance of subplate synapses in a sex-specific fashion, and CELF4 target mRNAs encode synaptic proteins and neurodevelopmental risk genes whose translation is controlled during fetal cortical development.\",\n      \"method\": \"Polysome profiling coupled with snRNA-seq on human fetal cortex, Celf4 conditional knockout (forebrain-specific), immunostaining, synaptic analysis\",\n      \"journal\": \"Nature Communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — polysome profiling + snRNA-seq + conditional KO with cellular phenotype; multiple orthogonal methods across human and mouse tissue\",\n      \"pmids\": [\"37758766\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"In pancreatic neuroendocrine tumor (PanNET) cells, CELF4 silencing alters mTOR signaling pathway activity and reduces in vivo xenograft tumor growth, and CELF4 modulation changes splicing event profiles; CELF4 is upregulated in PanNETs compared to non-tumoral adjacent tissue.\",\n      \"method\": \"siRNA/shRNA silencing in PanNET cell lines, RNA-seq (splicing and gene expression), in vivo xenograft experiments, functional proliferation assays, everolimus combination assays\",\n      \"journal\": \"Molecular Therapy: Nucleic Acids\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — in vitro and in vivo functional assays with RNA-seq; single lab, pathway placement via functional genomics without direct biochemical reconstitution\",\n      \"pmids\": [\"38187140\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Heterozygous loss-of-function or missense variants in the N-terminal RRM domain region of CELF4 (essential for RNA-binding and splicing activity) in humans cause a neurodevelopmental disorder featuring intellectual disability, seizures, and obesity, confirming that the RNA-binding activity of CELF4's N-terminal RRMs is essential for normal neurodevelopment.\",\n      \"method\": \"Exome/genome sequencing in 15 patients with CELF4 variants, genotype-phenotype correlation, domain mapping to known RNA-binding/splicing regions\",\n      \"journal\": \"European Journal of Human Genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — human genetics with domain-function mapping based on prior biochemical data; no new in vitro functional assay, but 15 patients provide moderate preponderance\",\n      \"pmids\": [\"40108438\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Conditional knockout of Celf4 in adult capsaicin-sensitive DRG neurons results in reduced rheobase and neuronal hyperexcitability (patch-clamp), and behavioral mechanical and thermal hypersensitivity, establishing CELF4 as a negative regulator of sensory neuron excitability in the peripheral nervous system.\",\n      \"method\": \"Conditional KO mouse (DRG-specific), patch-clamp electrophysiology on dissociated DRG neurons, behavioral assays (mechanical/thermal thresholds, capsaicin/NGF-evoked hypersensitivity)\",\n      \"journal\": \"Neurobiology of Pain\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — cell-type-specific conditional KO combined with electrophysiology and multiple behavioral readouts; multiple orthogonal methods\",\n      \"pmids\": [\"41089293\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"CELF4 overexpression in the spinal cord of chronic constriction injury (CCI) mice (via AAV) reduces mechanical and thermal hypersensitivity and downregulates TRPV1 and COX-2 protein expression; conversely, CELF4 knockdown rescues TRPV1 and COX-2 expression, identifying CELF4 as a suppressive regulator of these pain mediators in neuropathic pain pathways.\",\n      \"method\": \"AAV-mediated CELF4 overexpression and knockdown in CCI mouse spinal cord, behavioral assays, Western blot for TRPV1 and COX-2\",\n      \"journal\": \"Journal of Molecular Neuroscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — gain- and loss-of-function in vivo with defined molecular and behavioral readouts; single lab, single publication\",\n      \"pmids\": [\"42207381\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"Celf4 haploinsufficiency in mice alters transmission at the endbulb of Held synapse in the cochlear nucleus: synaptic vesicle release is subtly reduced, bushy cell excitability is dampened (hyperpolarized resting membrane potential), and spike kinetics are faster due to enhanced fast-inactivating A-type potassium current (IA); hair cell ribbon synapses are largely unaffected.\",\n      \"method\": \"Celf4 heterozygous mouse model, auditory brainstem responses (ABR), patch-clamp electrophysiology of bushy cells, hair cell and SGN counts, ribbon synapse analysis\",\n      \"journal\": \"Cellular and Molecular Neurobiology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — electrophysiology and ABR in haploinsufficient mice with defined synaptic phenotype; single lab, multiple electrophysiology methods\",\n      \"pmids\": [\"42029780\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"CELF4 is a neuronal RNA-binding protein that binds mRNA 3' UTRs (and intronic MSEs for splicing targets) via its N-terminal RRM1/RRM2 domains, regulating mRNA stability, translation, and alternative splicing (notably of cardiac troponin T/TNNT2); in the CNS it is expressed predominantly in excitatory neurons where it limits translation of synaptic mRNAs (including Scn8a/Nav1.6), suppresses excitatory neurotransmission and neuronal hyperexcitability, controls dendritic spine density, and regulates initial synapse formation in the prenatal neocortex, with loss of CELF4 function causing seizures, synaptic dysregulation, and neurodevelopmental disorder in both mice and humans.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"CELF4 is a neuronal RNA-binding protein that controls gene expression at the levels of alternative splicing, mRNA stability, and translation, and functions as a brake on neuronal excitability across the central and peripheral nervous systems [#5, #3, #12]. Sequence-specific RNA binding is mediated by its N-terminal RNA recognition motifs: either RRM1 or RRM2 is sufficient to bind intronic muscle-specific elements (MSEs) flanking the cardiac troponin T (cTNT/TNNT2) alternative exon, and this activity drives MSE-dependent exon inclusion [#0, #1], with the same locus regulated in human cardiac tissue [#7]. Transcriptome-wide, CELF4 binds a large fraction of mRNAs with strong preference for 3' UTRs, and its loss impairs target mRNA stability and translational availability and causes synaptic-transmission transcripts to mislocalize to the neuropil [#5]. In the brain it is expressed predominantly in excitatory neurons, where it specifically restrains excitatory neurotransmission; one key target is Scn8a mRNA, and CELF4 deficiency elevates Nav1.6 protein at the axon initial segment, increases persistent sodium current, and lowers the action potential threshold [#3, #4]. Loss of CELF4 lowers seizure threshold and produces spontaneous seizures in mice [#2, #3], reduces dendritic spine density [#8], and disrupts subplate synapse balance during prenatal neocortical development [#9]; the same negative regulation of excitability operates in peripheral sensory neurons, where CELF4 suppresses DRG and spinal pain-pathway excitability and pain-mediator expression [#12, #13]. Heterozygous loss-of-function and N-terminal RRM missense variants in CELF4 cause a human neurodevelopmental disorder with intellectual disability, seizures, and obesity, establishing that RRM-dependent RNA binding is essential for normal neurodevelopment [#11].\",\n  \"teleology\": [\n    {\n      \"year\": 2004,\n      \"claim\": \"Established the molecular basis of CELF4 RNA recognition and its function as a splicing activator by mapping which domains bind RNA and drive exon inclusion.\",\n      \"evidence\": \"Systematic deletion/truncation mutagenesis with in vitro RNA binding and in vivo splicing assays on the cTNT MSE substrate\",\n      \"pmids\": [\"14973222\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Defined activity on a single splicing substrate (cTNT); transcriptome-wide splicing scope not addressed\", \"No structural model of the RRM–MSE complex\", \"Did not address neuronal targets or function\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Connected CELF4 loss to a neurological phenotype, showing it regulates neuroexcitability-related transcripts whose dysregulation produces seizures.\",\n      \"evidence\": \"Brunol4/Celf4 mutant (frequent-flyer) mouse model with expression profiling and EEG\",\n      \"pmids\": [\"17677002\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Down-regulated transcripts were correlative, not shown to be direct binding targets\", \"Cell type responsible for the phenotype not resolved\", \"Mechanism linking RNA changes to excitability undefined\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Localized CELF4 function to excitatory neurons, demonstrating that loss there is sufficient for seizures and selectively dysregulates excitatory transmission.\",\n      \"evidence\": \"Cell-type-specific conditional knockout mice with patch-clamp electrophysiology and inhibitory-neuron reporter imaging\",\n      \"pmids\": [\"21745337\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct molecular target driving altered excitatory transmission not yet identified at this stage\", \"Did not distinguish translational vs splicing mechanisms\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Identified a direct mechanistic effector of the excitability phenotype by showing CELF4 binds Scn8a mRNA and controls Nav1.6 channel availability at the axon initial segment.\",\n      \"evidence\": \"RNA immunoprecipitation, immunostaining of AIS Nav1.6, and patch-clamp electrophysiology in knockout cortical neurons\",\n      \"pmids\": [\"23090952\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether regulation is via translation, localization, or stability of Scn8a mRNA not fully resolved\", \"Other channel targets contributing to hyperexcitability not enumerated\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Defined CELF4's transcriptome-wide binding mode and post-transcriptional mechanism, showing 3' UTR preference and roles in mRNA stability, translation, and subcellular localization.\",\n      \"evidence\": \"CLIP-seq target identification, polysome profiling, and neuropil-vs-cell-body transcriptome analysis in knockout mice\",\n      \"pmids\": [\"23209433\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Precise binding motif/structural determinants of 3' UTR selectivity not defined\", \"Causal hierarchy among stability, translation, and localization effects unresolved\", \"Co-factors mediating these effects unknown\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Revealed dynamic, developmentally staged subcellular localization, supporting dual nuclear (processing) and cytoplasmic (localization/translation) roles.\",\n      \"evidence\": \"In situ hybridization and immunofluorescence across retinal development with cell-type markers\",\n      \"pmids\": [\"23932931\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Localization is descriptive; functional consequences in retina not tested\", \"Signals controlling the nuclear-to-cytoplasmic shift unknown\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Extended the splicing function to human tissue, correlating a CELF4 polymorphism with TNNT2 splice-variant composition in human heart.\",\n      \"evidence\": \"GWAS with replication plus genotype-stratified TNNT2 splicing analysis in healthy human heart\",\n      \"pmids\": [\"26811534\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Correlative; no direct functional assay of the variant on splicing\", \"Mechanism of cardiomyopathy-risk modification not established\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Linked CELF4 to dendritic spine maintenance and affective behavior, broadening its role beyond excitability control.\",\n      \"evidence\": \"AAV-shRNA knockdown in mouse prefrontal cortex with spine quantification and depression-like behavioral assays\",\n      \"pmids\": [\"35306363\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Target mRNAs mediating spine loss not identified\", \"Single lab, single study\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Placed CELF4 in prenatal cortical synaptogenesis, controlling translation of synaptic and neurodevelopmental-risk mRNAs and subplate synapse balance.\",\n      \"evidence\": \"Polysome profiling with snRNA-seq on human fetal cortex plus forebrain-specific conditional knockout with synaptic analysis\",\n      \"pmids\": [\"37758766\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism of sex-specific synaptic effects unexplained\", \"Individual causal target transcripts for the synaptic phenotype not pinned down\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Identified a non-neuronal oncogenic context, implicating CELF4 in mTOR signaling and splicing regulation in pancreatic neuroendocrine tumors.\",\n      \"evidence\": \"siRNA/shRNA silencing in PanNET cell lines with RNA-seq, proliferation assays, and xenograft growth\",\n      \"pmids\": [\"38187140\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct CELF4 targets driving mTOR changes not defined\", \"Whether tumor effect is via splicing or other post-transcriptional control unresolved\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Established CELF4 as a human disease gene, showing N-terminal RRM variants cause a neurodevelopmental disorder and confirming RNA-binding activity is essential for neurodevelopment.\",\n      \"evidence\": \"Exome/genome sequencing in 15 patients with genotype-phenotype correlation and domain mapping\",\n      \"pmids\": [\"40108438\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No new functional assay of patient variants\", \"Mechanism linking RRM dysfunction to obesity phenotype not established\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Generalized CELF4's role as an excitability brake to the peripheral nervous system, showing it suppresses sensory neuron firing and pain behavior.\",\n      \"evidence\": \"DRG-specific conditional knockout with patch-clamp electrophysiology and mechanical/thermal behavioral assays\",\n      \"pmids\": [\"41089293\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct target transcripts in DRG neurons not identified\", \"Relationship to the cortical Scn8a mechanism not tested\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"Defined CELF4-regulated pain mediators, showing it suppresses spinal TRPV1 and COX-2 expression and modulates neuropathic pain.\",\n      \"evidence\": \"AAV-mediated overexpression and knockdown in CCI mouse spinal cord with behavior and Western blot\",\n      \"pmids\": [\"42207381\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether TRPV1/COX-2 mRNAs are direct CELF4 binding targets not shown\", \"Single lab, single study\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"Demonstrated CELF4 dosage sensitivity at a central auditory synapse, affecting vesicle release, intrinsic excitability, and A-type potassium current.\",\n      \"evidence\": \"Celf4 haploinsufficient mice with ABR and patch-clamp electrophysiology of cochlear nucleus bushy cells\",\n      \"pmids\": [\"42029780\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular targets underlying altered IA and release not identified\", \"Single lab study\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How CELF4 selects its 3' UTR targets at the structural/motif level and the causal hierarchy by which it controls stability, translation, and localization to set neuronal excitability remain unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No structural model of RRM–RNA recognition defining target specificity\", \"Co-factors/effectors mediating mRNA stability and translational control unknown\", \"Direct target transcripts linking CELF4 loss to PNS, auditory, and affective phenotypes largely uncatalogued\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0003723\", \"supporting_discovery_ids\": [0, 1, 4, 5]},\n      {\"term_id\": \"GO:0045182\", \"supporting_discovery_ids\": [5, 9]},\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [0, 1]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [6]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [6]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-8953854\", \"supporting_discovery_ids\": [0, 1, 5]},\n      {\"term_id\": \"R-HSA-112316\", \"supporting_discovery_ids\": [3, 4, 12]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [9]}\n    ],\n    \"complexes\": [],\n    \"partners\": [],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":6,"faith_total":6,"faith_pct":100.0}}