{"gene":"RBM3","run_date":"2026-04-28T19:45:45","timeline":{"discoveries":[{"year":1997,"finding":"RBM3 transcript levels are increased in human cells in response to cold stress (32°C), and this induction is also triggered by protein synthesis inhibitors cycloheximide and puromycin, establishing it as a cold-shock and translational stress-responsive gene.","method":"RT-PCR and Northern blot in multiple human cell lines; protein synthesis inhibitor treatment","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 — multiple cell lines and multiple stress conditions, single lab","pmids":["9245737"],"is_preprint":false},{"year":2001,"finding":"The 5' leader of Rbm3 mRNA contains an internal ribosome entry site (IRES) that mediates cap-independent translation, with activity enhanced up to 5-fold at mild hypothermia (33°C) compared to 37°C, explaining how Rbm3 protein levels increase even when global cap-dependent translation is suppressed by cold.","method":"Dicistronic reporter mRNA transfection in cells and cell-free lysates; IRES activity assay at different temperatures","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 — in vitro and cell-based reconstitution of IRES activity with temperature-dependent functional readout","pmids":["11470798"],"is_preprint":false},{"year":2003,"finding":"The Rbm3 mRNA IRES is highly modular, composed of at least 9 discrete cis-acting sequences including a 22-nt IRES module, a 10-nt enhancer, and 2 inhibitory sequences; the 22-nt module binds directly to 40S ribosomal subunits to facilitate translation initiation.","method":"Deletion and mutational analysis of IRES; 40S ribosomal subunit binding assay; cytoplasmic protein binding studies","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 — mutagenesis combined with ribosome binding assay in vitro","pmids":["12824175"],"is_preprint":false},{"year":2004,"finding":"RBM3 (and CIRP) transcription is induced by hypoxia independently of HIF-1 and mitochondria, as shown in HIF-1α-deficient, HIF-1β-deficient, and mitochondria-depleted cells; induction is blocked by actinomycin-D and respiratory chain inhibitors, and confirmed by nuclear run-on assays.","method":"Nuclear run-on assay; actinomycin-D treatment; HIF-1-deficient cell lines; mitochondria-depleted cells; respiratory chain inhibitors","journal":"Journal of cell science","confidence":"High","confidence_rationale":"Tier 1–2 — nuclear run-on assays plus multiple genetic/pharmacological controls","pmids":["15075239"],"is_preprint":false},{"year":2005,"finding":"Rbm3 overexpression in mouse neuroblastoma N2a cells enhances global protein synthesis 3-fold; a fraction of Rbm3 associates with 60S ribosomal subunits in an RNA-independent manner; Rbm3 expression alters microRNA levels (reduces a complex sedimenting between gradient top and 40S subunits that contains microRNA).","method":"Protein synthesis assay (radioactive incorporation); polysome profiling; sucrose gradient fractionation; c-Myc fusion protein overexpression","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 1–2 — multiple orthogonal methods in single study; strong mechanistic link","pmids":["15684048"],"is_preprint":false},{"year":2007,"finding":"RBM3 localizes to dendrites in neurons, co-fractionates with heavy mRNA granules and translation machinery components in sucrose gradients, and overexpression of RBM3 isoforms enhances global translation, active polysome formation, and initiation factor activation in neuronal cell lines; the isoform lacking a spliced arginine shows higher dendritic localization.","method":"Sucrose gradient fractionation; immunofluorescence in dissociated neurons; overexpression of alternatively spliced isoforms; polysome profiling","journal":"Journal of neurochemistry","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal methods, direct localization tied to functional consequence","pmids":["17403028"],"is_preprint":false},{"year":2008,"finding":"RBM3 overexpression in NIH3T3 and SW480 cells increases cell proliferation and anchorage-independent growth; RBM3 knockdown in HCT116 cells causes growth arrest, mitotic catastrophe with nuclear cyclin B1 accumulation and phosphorylation of Cdc25c, Chk1, Chk2; RBM3 enhances COX-2, IL-8, and VEGF mRNA stability and translation.","method":"siRNA knockdown; forced overexpression; soft agar colony assay; tumor xenograft; caspase assays; mRNA stability and translation assays","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal methods across cell types and in vivo xenograft","pmids":["18427544"],"is_preprint":false},{"year":2011,"finding":"RBM3 knockdown in fibroblasts and HEK293 cells reduces cell viability and leads to cell death without caspase-3-mediated apoptosis; RBM3 overexpression rescues cells from serum starvation-induced death and is associated with increased translation rates (measured by radiolabeled amino acid incorporation).","method":"siRNA knockdown; overexpression; cell viability assay; radiolabeled amino acid incorporation for translation measurement","journal":"Pediatric research","confidence":"Medium","confidence_rationale":"Tier 2 — clean KD/OE with defined phenotype and direct translation measurement","pmids":["19770690"],"is_preprint":false},{"year":2011,"finding":"RBM3 is required for hypothermia-induced neuroprotection in neurons; RBM3 overexpression reduces PARP cleavage, prevents internucleosomal DNA fragmentation, and reduces LDH release; siRNA knockdown of RBM3 significantly diminishes the neuroprotective effect of hypothermia.","method":"siRNA knockdown; vector-driven overexpression; primary neurons, PC12 cells, cortical organotypic slice cultures; PARP cleavage assay; DNA fragmentation assay; LDH release assay","journal":"Neurobiology of disease","confidence":"High","confidence_rationale":"Tier 2 — reciprocal gain/loss-of-function across multiple neuronal models with defined molecular phenotypes","pmids":["21527344"],"is_preprint":false},{"year":2011,"finding":"RBM3 is an essential regulator of miRNA biogenesis at the Dicer processing step: RBM3 knockdown downregulates >60% of detectable miRNAs in neuronal cells (affecting ~70 nt precursor levels without changing primary transcripts or Dicer activity); RBM3 binds directly to ~70 nt pre-miRNA intermediates and promotes their association with active Dicer complexes.","method":"miRNA array; Northern blot; PCR; RBM3 knockdown/overexpression; pre-miRNA binding assay; Dicer activity assay; subcellular fractionation for nuclear transport","journal":"PloS one","confidence":"High","confidence_rationale":"Tier 1–2 — direct binding assay combined with multiple orthogonal methods establishing mechanism at the Dicer step","pmids":["22145045"],"is_preprint":false},{"year":2011,"finding":"RBM3-deficient (Rbm3−/−) mouse embryonic fibroblasts show markedly increased G2-phase cell accumulation compared to controls, indicating a role for RBM3 in G2-phase cell cycle control.","method":"Generation of Rbm3 knockout mice; cell cycle analysis of MEFs by flow cytometry","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 — clean KO with defined cell cycle phenotype, single lab","pmids":["21684257"],"is_preprint":false},{"year":2013,"finding":"RBM3 overexpression or culture at 32°C suppresses alternative splicing of CD44 variant v8-v10 and increases standard CD44s isoform in prostate cancer cells; RBM3 silencing increases CD44v8-v10 to CD44s ratio; elevated CD44v8-v10 interferes with MMP9-mediated cleavage of CD44s and suppresses cyclin D1 expression, linking RBM3 to stress-regulated RNA splicing and stem cell-like properties.","method":"RBM3 overexpression; siRNA silencing; RT-PCR for CD44 isoforms; soft agar colony assay; in vivo tumorigenicity","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 2 — reciprocal gain/loss-of-function with direct molecular readout of splicing and downstream pathway","pmids":["23667174"],"is_preprint":false},{"year":2015,"finding":"RBM3 mediates synapse regeneration after cooling in the brain; failure to induce RBM3 in prion-infected and 5XFAD mouse models impairs synapse reassembly after cooling; RBM3 overexpression (by hypothermic boosting or lentiviral delivery) restores synapse regeneration, prevents behavioral deficits and neuronal loss, and prolongs survival; RBM3 knockdown exacerbates synapse loss.","method":"Prion and 5XFAD mouse models; lentiviral RBM3 overexpression; cooling experiments; synapse quantification; behavioral testing; survival analysis; RBM3 siRNA knockdown","journal":"Nature","confidence":"High","confidence_rationale":"Tier 2 — reciprocal gain/loss-of-function in multiple in vivo models with defined synaptic and behavioral phenotypes; replicated across two disease models","pmids":["25607368"],"is_preprint":false},{"year":2015,"finding":"RBM3 inhibits the PERK-eIF2α-CHOP ER stress pathway through cooperation with NF90; RBM3 knockout exacerbates PERK-eIF2α-CHOP signaling in hippocampal slices; overexpression of RBM3 prevents PERK phosphorylation; affinity purification-mass spectrometry, Co-IP, and proximity ligation assay identify NF90 as a novel RBM3 interactor and show NF90 interacts with PERK in an RNA-dependent manner.","method":"RBM3 knockout mouse hippocampal slices; siRNA knockdown; overexpression in HEK293 cells; affinity purification-mass spectrometry; co-immunoprecipitation; proximity ligation assay; Western blot for PERK/eIF2α/CHOP phosphorylation","journal":"FASEB journal","confidence":"High","confidence_rationale":"Tier 1–2 — multiple orthogonal methods identifying novel interaction and mechanism; KO animal model used","pmids":["26472337"],"is_preprint":false},{"year":2017,"finding":"RTN3 (reticulon protein) is a downstream effector of RBM3-mediated neuroprotection: cooling induces RTN3 expression partly by RBM3 binding to RTN3 mRNA; RTN3 overexpression independently prevents synaptic loss and cognitive deficits in a neurodegeneration mouse model; RTN3 knockdown eliminates cooling-induced neuroprotection.","method":"Ribosome profiling/translatome analysis; RBM3 knockdown/overexpression; lentiviral RTN3 overexpression; mouse neurodegeneration model; siRNA knockdown of RTN3; behavioral and synaptic assays","journal":"Current biology : CB","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal in vivo and in vitro methods establishing RBM3-RTN3 axis","pmids":["28238655"],"is_preprint":false},{"year":2018,"finding":"NF-κB p65, phosphorylated at Ser276 by hypothermia, binds the RBM3 promoter and activates RBM3 transcription; inhibition of NF-κB p65 nuclear translocation by CAPE decreases RBM3 mRNA/protein and increases apoptosis that is rescued by RBM3 overexpression, establishing NF-κB p65 as a transcriptional activator of RBM3.","method":"NF-κB inhibitor CAPE; RBM3 overexpression; promoter binding analysis; Western blot for p65 phosphorylation; apoptosis assays","journal":"Journal of cellular biochemistry","confidence":"Medium","confidence_rationale":"Tier 2 — promoter binding and rescue experiment, single lab","pmids":["29388696"],"is_preprint":false},{"year":2018,"finding":"RBM3 directly interacts with PI3K subunit p85 in nasopharyngeal carcinoma cells, activating the AKT/Bcl-2 signaling pathway to confer radioresistance; AKT inhibition attenuates RBM3-mediated radioresistance.","method":"Co-immunoprecipitation; RBM3 knockdown and overexpression; AKT inhibitor treatment; apoptosis and clonogenic assays","journal":"American journal of translational research","confidence":"Medium","confidence_rationale":"Tier 3 — Co-IP identifying p85 binding, functional rescue with inhibitor, single lab","pmids":["30662656"],"is_preprint":false},{"year":2019,"finding":"RBM3 interacts with IGF2 mRNA-binding protein 2 (IMP2), elevates its expression, and stimulates IGF2 release in the subgranular zone (SGZ) but not subventricular zone (SVZ) neural stem/progenitor cells after hypoxic-ischemic brain injury, establishing a niche-dependent RBM3-IMP2-IGF2 signaling pathway promoting neurogenesis.","method":"Co-immunoprecipitation; RBM3 overexpression/knockdown; ELISA for IGF2; BrdU incorporation; in vivo HI brain injury model; immunofluorescence","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 — reciprocal Co-IP and in vivo loss/gain of function with defined molecular pathway","pmids":["31484925"],"is_preprint":false},{"year":2019,"finding":"RBM3 binds to the 3'UTR of Yap1 mRNA (at seven identified binding sites) and stabilizes it, thereby increasing YAP1 protein expression and affecting neuronal differentiation during embryonic brain development under cold stress.","method":"RNA-binding motif analysis; 3'UTR binding assays; RBM3 knockout in vivo; mRNA stability assay; RBM3 and YAP1 overexpression rescue in KO","journal":"The Journal of cell biology","confidence":"High","confidence_rationale":"Tier 2 — direct RNA binding demonstrated with functional consequence in vivo; rescue experiment","pmids":["30037926"],"is_preprint":false},{"year":2019,"finding":"RBM3 promotes cell proliferation in hepatocellular carcinoma by regulating biogenesis of the circular RNA SCD-circRNA 2; RBM3-mediated HCC cell proliferation is SCD-circRNA 2-dependent.","method":"RBM3 overexpression/modulation; RNA-seq; functional proliferation assays; circRNA quantification","journal":"EBioMedicine","confidence":"Medium","confidence_rationale":"Tier 2 — gain/loss-of-function with defined molecular and cellular phenotype, single lab","pmids":["31235426"],"is_preprint":false},{"year":2019,"finding":"RBM3 upregulates ARPC2 through post-transcriptional binding to ARPC2 3'UTR mRNA, promoting breast cancer cell proliferation and metastasis; knockdown of RBM3 decreases ARPC2 expression and reduces proliferation and metastasis.","method":"RBM3 knockdown; RNA pulldown/3'UTR binding; Western blot; proliferation and migration assays","journal":"International journal of oncology","confidence":"Medium","confidence_rationale":"Tier 3 — 3'UTR binding assay with functional follow-up, single lab","pmids":["30720048"],"is_preprint":false},{"year":2020,"finding":"RBM3 knockdown in hippocampal neurons specifically alters local synaptic translation without affecting global cellular translation, and changes synaptic vesicle dynamics and neuronal activity patterns; RBM3 amounts change specifically at synapses over 24-hour cycles.","method":"Transcriptome analysis at different time points; siRNA knockdown; synaptic vesicle dynamics assay; local translation measurement; live imaging","journal":"The Journal of neuroscience","confidence":"Medium","confidence_rationale":"Tier 2 — KD with specific synaptic translation phenotype distinct from global translation, single lab","pmids":["33310754"],"is_preprint":false},{"year":2021,"finding":"Cooling induces RBM3 via activation of TrkB through PLCγ1 and pCREB signaling; RBM3 in turn exerts negative feedback on TrkB-induced ERK activation by inducing the ERK-specific phosphatase DUSP6; TrkB antagonism abrogates cooling-induced RBM3 induction and neuroprotection in prion-diseased mice; TrkB agonism induces RBM3 without cooling, preventing neurodegeneration.","method":"Pharmacological TrkB antagonism/agonism; RBM3-null neurons; prion disease mouse model; Western blot for PLCγ1, pCREB, ERK, DUSP6; synapse/neurodegeneration assays","journal":"Life science alliance","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal pharmacological and genetic approaches in vitro and in vivo establishing TrkB-PLCγ1-pCREB-RBM3-DUSP6 axis","pmids":["33563652"],"is_preprint":false},{"year":2021,"finding":"NMR structure of the N-terminal 84-residue RNA recognition motif (RRM) of human RBM3 was solved; the RRM adopts a βαββαβ topology; the beta-sheet and two loops form the RNA-binding interface via hydrogen bond, pi-pi, and pi-cation interactions; RBM3 forms temperature-dependent oligomers in solution via the RRM domain, favored by decreasing temperature.","method":"Solution NMR structure determination; NMR-monitored titration with RNA; molecular dynamics simulation; size exclusion chromatography; chemical cross-linking; temperature-dependent NMR","journal":"The FEBS journal","confidence":"High","confidence_rationale":"Tier 1 — NMR structure with functional RNA binding validation and molecular dynamics; multiple orthogonal methods","pmids":["34837346"],"is_preprint":false},{"year":2022,"finding":"RBM3 interacts with Raptor to regulate the autophagy pathway in cardiomyocytes; RBM3 downregulation inhibits autophagy and promotes apoptosis under ischemia-reperfusion conditions.","method":"Co-immunoprecipitation confirming RBM3-Raptor interaction; RBM3 knockdown; autophagy and apoptosis assays in I/R model","journal":"Journal of physiology and biochemistry","confidence":"Medium","confidence_rationale":"Tier 3 — Co-IP identifying Raptor binding with functional follow-up, single lab","pmids":["36192581"],"is_preprint":false},{"year":2023,"finding":"RBM3 has a binding relationship with SLC7A11 mRNA; sodium butyrate promotes RBM3 expression, which indirectly downregulates SLC7A11, thereby promoting ferroptosis in endometrial cancer cells.","method":"RNA pulldown and mass spectrometry; transcriptome analysis; metabolome analysis; overexpression; subcutaneous xenograft model","journal":"Apoptosis","confidence":"Medium","confidence_rationale":"Tier 2 — RNA pulldown with mass spectrometry confirming direct binding; functional in vitro and in vivo","pmids":["37170022"],"is_preprint":false},{"year":2023,"finding":"RBM3 cold induction is regulated by a poison exon within the RBM3 gene whose temperature-dependent inclusion targets mRNA for nonsense-mediated decay; HNRNPH1 mediates cold-dependent exon skipping via its thermosensitive interaction with a G-rich motif within the poison exon; ASO-mediated exclusion of the poison exon raises RBM3 levels at normothermia and provides neuroprotection in prion-diseased mice.","method":"Genome-wide CRISPR-Cas9 KO screen in iPSC-derived neurons; splicing analysis; HNRNPH1 KO; ASO treatment; mouse prion disease model; neuronal loss and spongiosis quantification","journal":"The EMBO journal / EMBO molecular medicine","confidence":"High","confidence_rationale":"Tier 1–2 — unbiased screen followed by mechanistic validation at RNA level, in vivo proof-of-concept; replicated across two papers (PMID 37248947 and 36946385)","pmids":["37248947","36946385"],"is_preprint":false},{"year":2023,"finding":"RBM3 upregulates N6-methyladenosine (m6A) methylation on CTNNB1 (β-catenin) mRNA in a METTL3-dependent manner, decreasing CTNNB1 mRNA stability and inactivating Wnt signaling, thereby inhibiting stemness remodeling of prostate cancer cells in the bone microenvironment.","method":"m6A methylation analysis; METTL3 dependence assay; RBM3 overexpression/silencing; co-culture with osteoblasts; Wnt signaling reporter","journal":"Cell death & disease","confidence":"Medium","confidence_rationale":"Tier 2 — direct m6A modification with identified writer (METTL3) and functional outcome, single lab","pmids":["36750551"],"is_preprint":false},{"year":2023,"finding":"RBM3 interacts with GAS6 mRNA to stabilize it, activating the Nrf2 signaling pathway and providing neuroprotection against acute brain injury.","method":"RNA immunoprecipitation assay; RBM3 overexpression; in vivo cerebral injury rat model; oxidative stress and apoptosis assays","journal":"Neuroscience","confidence":"Medium","confidence_rationale":"Tier 3 — RIP confirming direct binding with functional downstream pathway, single lab","pmids":["38555015"],"is_preprint":false},{"year":2021,"finding":"MZF1 acts as a transcription factor for RBM3, binding the RBM3 promoter (confirmed by ChIP and dual-luciferase assay) and promoting RBM3 transcription; this MZF1-RBM3 axis protects against oxidative stress and apoptosis in neuronal cells.","method":"ChIP assay; dual-luciferase reporter assay; MZF1 overexpression; RBM3 siRNA knockdown; oxidative stress and apoptosis assays","journal":"The Journal of toxicological sciences","confidence":"Medium","confidence_rationale":"Tier 2 — ChIP and luciferase assay establishing direct transcription factor binding with functional readout","pmids":["34602532"],"is_preprint":false},{"year":2021,"finding":"RBM3 intrinsically suppresses lung innate lymphoid cell (ILC) activation and type 2/17 inflammation; Rbm3−/− ILCs from bone marrow chimeric mice show increased cytokine production; RBM3-deficient ILCs have increased expression of CysLT1R, and double-KO of Rbm3 and Cyslt1r reduces ST2+IL-17+ ILC accumulation, showing dependence on CysLT1R for part of RBM3's suppressive function.","method":"Rbm3−/− mice; Rbm3−/−Rag2−/− mice; bone marrow chimeric mice; allergen challenge model; RNA-seq of Rbm3−/− ILCs; double KO with Cyslt1r","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 — multiple genetic models with defined ILC-intrinsic suppressive function and pathway placement via double KO epistasis","pmids":["35908044"],"is_preprint":false},{"year":2022,"finding":"RBM3 overexpression promotes AKT phosphorylation and enhances glucose metabolism and reduces apoptosis in skeletal muscle under cold exposure; O-GlcNAcylation of NF-κB p65 (mediated by OGT) upregulates RBM3, and OGT-specific skeletal muscle KO mice show decreased RBM3 and p65 phosphorylation, confirming the OGT-p65-RBM3-AKT axis.","method":"RBM3 overexpression in C2C12; OGT KO mice; wortmannin AKT inhibition; Western blot; glycolysis and apoptosis assays","journal":"Cell stress & chaperones","confidence":"Medium","confidence_rationale":"Tier 2 — in vitro overexpression corroborated by tissue-specific KO mouse with defined signaling phenotype","pmids":["36149580"],"is_preprint":false},{"year":2017,"finding":"FAK/Src signaling axis regulates cold-induced RBM3 gene transcription; FAK-specific inhibitor or FAK/Src siRNA silencing significantly abrogates hypothermia-induced RBM3 expression and blocks neuroprotective effects of mild hypothermia against rotenone.","method":"Pharmacological inhibitors of multiple signaling pathways; siRNA knockdown of FAK and Src; RT-PCR and Western blot for RBM3; cell viability assay","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 — pharmacological and genetic silencing converge on FAK/Src as upstream regulator of RBM3 transcription","pmids":["33272569"],"is_preprint":false},{"year":2024,"finding":"RBM3 stabilizes SOX11 mRNA, increasing its protein expression and promoting neuronal differentiation of human neural stem cells under mild hypothermia (35°C); identified by single-cell RNA sequencing and validated functionally.","method":"Single-cell RNA sequencing; RBM3 overexpression/knockdown; mRNA stability assay; in vitro and in vivo NSC transplantation; neuronal differentiation assay","journal":"iScience","confidence":"Medium","confidence_rationale":"Tier 2 — scRNA-seq discovery with functional mRNA stabilization validation in vitro and in vivo","pmids":["38523796"],"is_preprint":false},{"year":2021,"finding":"RBM3 binds MMP9 mRNA (confirmed by RNA immunoprecipitation) and increases MMP9 mRNA stability in pulmonary microvascular endothelial cells, increasing cell permeability; RBM3 also reduces LPS-induced apoptosis possibly by suppressing p53 expression.","method":"RNA immunoprecipitation (RIP assay); actinomycin D mRNA stability assay; RBM3 overexpression/knockdown via lentivirus; cell permeability and tight junction assays","journal":"The Journal of surgical research","confidence":"Medium","confidence_rationale":"Tier 3 — RIP confirming direct binding with functional mRNA stability and permeability readout, single lab","pmids":["33460967"],"is_preprint":false},{"year":2023,"finding":"RBM3 binds mRNAs in skeletal muscle predominantly at the junction between the coding region and 3'UTR (identified 14-nucleotide motif); bound transcripts are enriched for contractile apparatus, translation initiation, and proteasome complex gene sets, including Myh1, Eif4b, and Trim63.","method":"RNA immunoprecipitation followed by RNA sequencing (RIP-seq); gene set enrichment analysis; motif scanning; network analysis","journal":"Physiological reports","confidence":"Medium","confidence_rationale":"Tier 2 — RIP-seq with motif identification; comprehensive but single lab","pmids":["36750123"],"is_preprint":false},{"year":2024,"finding":"RBM3 overexpression promotes mitochondrial metabolism, cellular proliferation, and differentiation of myoblasts; proteomic analysis of RBM3-overexpressing C2C12 cells shows enrichment of fatty acid metabolism, RNA metabolism, and electron transport chain pathways; RBM3 is necessary for enhanced differentiation and maintenance of mitochondrial metabolism during hypothermic preconditioning.","method":"Hypothermic preconditioning; RBM3 overexpression; proteomic analysis; C2C12 and primary myoblast differentiation assays; mitochondrial metabolism assays","journal":"Communications biology","confidence":"Medium","confidence_rationale":"Tier 2 — overexpression with proteomic profiling plus functional differentiation and metabolism assays","pmids":["38688991"],"is_preprint":false}],"current_model":"RBM3 is a cold-shock RNA-binding protein (with a defined βαββαβ RRM domain that binds RNA via its beta-sheet/loop interface and forms temperature-dependent oligomers) that is transcriptionally induced by hypothermia via NF-κB p65, FAK/Src, and TrkB/PLCγ1/pCREB signaling, and post-transcriptionally regulated by temperature-sensitive inclusion of a poison exon (repressed by HNRNPH1 at cold temperatures); it promotes global and local protein synthesis by associating with 60S ribosomal subunits, enhancing IRES-mediated cap-independent translation of its own mRNA, facilitating polysome assembly, and promoting pre-miRNA processing at the Dicer step; it also stabilizes specific target mRNAs (including Yap1, GAS6, SOX11, SLC7A11, ARPC2, MMP9), regulates CD44 alternative splicing, modulates the PERK-eIF2α-CHOP ER stress pathway via NF90, activates AKT and ERK signaling, interacts with Raptor to regulate autophagy, and mediates synapse regeneration through induction of RTN3, with negative feedback on TrkB-ERK signaling via DUSP6."},"narrative":{"teleology":[{"year":1997,"claim":"Identifying RBM3 as a cold- and translational-stress-inducible gene established the founding observation that mammalian cells mount a specific transcriptional response to mild hypothermia, paralleling bacterial cold-shock proteins.","evidence":"RT-PCR and Northern blot across multiple human cell lines at 32°C and with protein synthesis inhibitors","pmids":["9245737"],"confidence":"Medium","gaps":["Mechanism of cold sensing upstream of transcription unknown","Protein-level induction not confirmed"]},{"year":2001,"claim":"Discovery that the RBM3 5′ leader contains a cold-enhanced IRES resolved how RBM3 protein accumulates under hypothermia despite global cap-dependent translation suppression, revealing a feed-forward autoregulatory loop.","evidence":"Dicistronic reporter assays in cells and cell-free lysates at 33°C vs 37°C","pmids":["11470798"],"confidence":"High","gaps":["Trans-acting factors required for IRES activity not identified","In vivo relevance of IRES not demonstrated"]},{"year":2003,"claim":"Dissecting the modular architecture of the RBM3 IRES — identifying a 22-nt module that directly binds 40S subunits — provided the first cis-element map for a mammalian cold-responsive IRES.","evidence":"Deletion/mutational analysis with 40S ribosomal subunit binding assays in vitro","pmids":["12824175"],"confidence":"High","gaps":["Structure of IRES-40S complex not resolved","Contribution of each module in vivo unknown"]},{"year":2005,"claim":"Demonstrating that RBM3 overexpression enhances global protein synthesis 3-fold and that RBM3 associates with 60S ribosomal subunits in an RNA-independent manner established RBM3 as a direct translational stimulator rather than merely a stress-response marker.","evidence":"Radioactive amino acid incorporation; polysome profiling and sucrose gradient fractionation in N2a cells","pmids":["15684048"],"confidence":"High","gaps":["Mechanism by which 60S association promotes translation initiation unclear","Whether endogenous RBM3 levels are sufficient for this effect untested"]},{"year":2007,"claim":"Localizing RBM3 to neuronal dendrites and showing isoform-dependent dendritic targeting extended the translational stimulation model to local synaptic translation, linking RBM3 to neuronal plasticity.","evidence":"Immunofluorescence in dissociated neurons; sucrose gradient co-fractionation with translation machinery; alternatively spliced isoform overexpression","pmids":["17403028"],"confidence":"High","gaps":["Specific dendritic mRNA targets not identified","Functional consequence for synaptic plasticity not tested"]},{"year":2008,"claim":"Showing that RBM3 knockdown causes mitotic catastrophe with G2 checkpoint activation, while overexpression promotes proliferation and stabilizes COX-2/VEGF/IL-8 mRNAs, revealed RBM3's dual role in cell cycle progression and selective mRNA stabilization relevant to oncogenesis.","evidence":"siRNA knockdown in HCT116; overexpression in NIH3T3/SW480; soft agar and xenograft assays; mRNA stability measurements","pmids":["18427544"],"confidence":"High","gaps":["Direct RNA binding to COX-2/VEGF/IL-8 not demonstrated with purified protein","Mechanism of mitotic catastrophe induction not resolved"]},{"year":2011,"claim":"Three concurrent advances — demonstrating RBM3's essential role in hypothermic neuroprotection, its regulation of miRNA biogenesis at the Dicer step, and G2-phase accumulation in Rbm3-null MEFs — collectively established RBM3 as a multi-level post-transcriptional regulator with in vivo physiological importance.","evidence":"siRNA/overexpression in primary neurons and organotypic slices (PARP cleavage, LDH release); miRNA arrays plus pre-miRNA binding and Dicer activity assays; Rbm3 KO MEFs with flow cytometry","pmids":["21527344","22145045","21684257"],"confidence":"High","gaps":["Specific miRNAs mediating neuroprotection not identified","Relationship between miRNA regulation and cell cycle control unexplored","Direct structural basis for pre-miRNA recognition unknown"]},{"year":2013,"claim":"Identifying RBM3 as a regulator of CD44 alternative splicing (shifting v8-v10 to standard isoform) linked the protein's RNA-binding activity to splicing regulation with consequences for cancer stemness properties.","evidence":"RBM3 overexpression/silencing in prostate cancer cells; RT-PCR for CD44 isoforms; soft agar and in vivo tumorigenicity","pmids":["23667174"],"confidence":"High","gaps":["Whether RBM3 directly binds CD44 pre-mRNA or acts indirectly not resolved","Generality of splicing regulation beyond CD44 unknown"]},{"year":2015,"claim":"Two key findings — that RBM3 mediates synapse regeneration after cooling in neurodegenerative mouse models and that it suppresses ER stress via NF90-dependent inhibition of the PERK-eIF2α-CHOP pathway — provided the first in vivo mechanism linking cold-induced RBM3 to structural neuroprotection and proteostasis.","evidence":"Prion and 5XFAD mouse models with lentiviral RBM3 overexpression/knockdown; behavioral and survival assays; AP-MS, Co-IP, and PLA identifying NF90; PERK phosphorylation in RBM3 KO hippocampal slices","pmids":["25607368","26472337"],"confidence":"High","gaps":["Full set of RBM3 target mRNAs driving synapse regeneration not catalogued","Whether NF90 interaction is direct or RNA-bridged not fully resolved"]},{"year":2017,"claim":"Identification of RTN3 as a downstream effector of RBM3-mediated neuroprotection, and of FAK/Src signaling as an upstream transcriptional inducer of RBM3, placed RBM3 within a defined signaling cascade from cold sensing to synaptic repair.","evidence":"Ribosome profiling identifying RTN3; lentiviral RTN3 rescue in neurodegeneration model; FAK/Src inhibitors and siRNA blocking RBM3 induction","pmids":["28238655","33272569"],"confidence":"High","gaps":["How RBM3 binding to RTN3 mRNA enhances its translation not mechanistically resolved","Integration of FAK/Src with NF-κB and TrkB pathways not established"]},{"year":2018,"claim":"Demonstrating that NF-κB p65, phosphorylated at Ser276 by hypothermia, directly binds the RBM3 promoter established a concrete transcription factor–promoter mechanism for cold-induced RBM3 expression.","evidence":"CAPE inhibition of NF-κB; promoter binding analysis; rescue by RBM3 overexpression; apoptosis assays","pmids":["29388696"],"confidence":"Medium","gaps":["ChIP-seq for p65 on RBM3 promoter not performed","Relationship between p65 Ser276 phosphorylation and cold sensing unclear"]},{"year":2019,"claim":"A cluster of studies identified direct 3′UTR binding targets of RBM3 (Yap1, ARPC2 mRNAs) and an interacting partner (IMP2) linking RBM3 to IGF2 release in neural stem cells, expanding the catalogue of RBM3-stabilized transcripts and establishing niche-specific signaling downstream of RBM3.","evidence":"3′UTR binding assays with KO rescue for Yap1; RNA pulldown for ARPC2; Co-IP plus ELISA for IMP2-IGF2 axis in SGZ neural stem cells after HI injury","pmids":["30037926","30720048","31484925"],"confidence":"High","gaps":["Transcriptome-wide binding map in neurons not available at this point","Whether IMP2 interaction is RNA-dependent not tested"]},{"year":2021,"claim":"Discovery of the TrkB/PLCγ1/pCREB–RBM3–DUSP6 signaling axis, where RBM3 provides negative feedback on ERK via DUSP6, and that TrkB agonism can substitute for cooling to induce RBM3 and prevent neurodegeneration, defined a pharmacologically actionable pathway for RBM3 induction.","evidence":"TrkB antagonist/agonist treatment in prion-diseased mice and RBM3-null neurons; Western blot for PLCγ1, pCREB, ERK, DUSP6","pmids":["33563652"],"confidence":"High","gaps":["Whether TrkB-RBM3 axis operates outside the nervous system untested","Mechanism by which RBM3 induces DUSP6 (transcriptional vs post-transcriptional) not determined"]},{"year":2021,"claim":"Structural determination of the RBM3 RRM domain by NMR, revealing its βαββαβ fold, RNA-binding interface, and temperature-dependent oligomerization, provided the first atomic-level framework for understanding how RBM3 senses temperature and engages RNA.","evidence":"Solution NMR; NMR-monitored RNA titration; molecular dynamics; SEC and cross-linking for oligomerization","pmids":["34837346"],"confidence":"High","gaps":["Structure of full-length RBM3 including glycine-rich C-terminal domain not solved","Oligomer interface residues not mapped by mutagenesis","No structure of RBM3 bound to a physiological RNA target"]},{"year":2021,"claim":"Demonstrating that Rbm3-null innate lymphoid cells show cell-intrinsic hyperactivation and increased CysLT1R expression, with epistasis via double KO, extended RBM3 function beyond neurons into immune regulation.","evidence":"Rbm3−/− and Rbm3−/−Rag2−/− mice; bone marrow chimeras; allergen challenge; RNA-seq; Rbm3/Cyslt1r double KO","pmids":["35908044"],"confidence":"High","gaps":["Direct RNA targets mediating ILC suppression not identified","Whether RBM3 regulates CysLT1R mRNA directly not tested"]},{"year":2023,"claim":"Discovery that cold-induced RBM3 expression is post-transcriptionally controlled by a poison exon whose temperature-sensitive inclusion (regulated by HNRNPH1 binding a G-rich motif) triggers NMD, and that ASO-mediated exon skipping raises RBM3 at normothermia and is neuroprotective, provided both a mechanistic explanation for temperature-dependent regulation and a therapeutic strategy.","evidence":"Genome-wide CRISPR screen in iPSC-derived neurons; HNRNPH1 KO; ASO treatment in prion-diseased mice; splicing and NMD analysis","pmids":["37248947","36946385"],"confidence":"High","gaps":["Thermosensor mechanism for HNRNPH1 binding affinity change not structurally defined","Long-term safety of ASO-mediated RBM3 induction not assessed"]},{"year":2023,"claim":"Identification of RBM3's ability to upregulate m6A methylation on CTNNB1 mRNA in a METTL3-dependent manner, and its binding to SLC7A11 and GAS6 mRNAs, expanded the post-transcriptional repertoire to include epitranscriptomic regulation and ferroptosis modulation.","evidence":"m6A analysis with METTL3 dependence for CTNNB1; RNA pulldown/MS for SLC7A11; RIP for GAS6; xenograft and brain injury models","pmids":["36750551","37170022","38555015"],"confidence":"Medium","gaps":["Whether RBM3 directly recruits METTL3 or acts indirectly not determined","RBM3-SLC7A11 interaction described as indirect downregulation — direct binding specificity unclear","Replication across independent labs needed"]},{"year":2024,"claim":"RIP-seq in skeletal muscle and scRNA-seq in neural stem cells refined the target mRNA landscape, identifying a preferred binding motif at the CDS-3′UTR junction and specific targets (SOX11, contractile apparatus genes) linking RBM3 to differentiation programs.","evidence":"RIP-seq with motif analysis in muscle; scRNA-seq with mRNA stability assays for SOX11 in NSCs; proteomic profiling of RBM3-overexpressing myoblasts","pmids":["36750123","38523796","38688991"],"confidence":"Medium","gaps":["CLIP-based binding maps at nucleotide resolution not yet available","Functional validation of most RIP-seq targets not performed","Single-lab studies awaiting independent replication"]},{"year":null,"claim":"Key open questions include: how does RBM3 oligomerization relate to its RNA-binding selectivity and translational stimulation; what is the full-length structure including the glycine-rich domain; how are target mRNA specificity and the diverse downstream outcomes (translation, splicing, miRNA biogenesis, m6A) coordinated; and whether ASO-mediated poison exon skipping is broadly therapeutic beyond prion disease.","evidence":"","pmids":[],"confidence":"Low","gaps":["No CLIP-seq map of endogenous RBM3 binding at nucleotide resolution","No full-length structural model","Mechanism linking 60S association to translation enhancement unresolved","In vivo relevance of many target mRNAs identified in single studies not confirmed"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0003723","term_label":"RNA binding","supporting_discovery_ids":[4,5,9,18,20,23,25,28,33,34,35]},{"term_id":"GO:0140098","term_label":"catalytic activity, acting on RNA","supporting_discovery_ids":[9,11]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[6,7,13,22]},{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[11,27]}],"localization":[{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[4,5]},{"term_id":"GO:0005840","term_label":"ribosome","supporting_discovery_ids":[4,5]},{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[9]}],"pathway":[{"term_id":"R-HSA-392499","term_label":"Metabolism of proteins","supporting_discovery_ids":[1,2,4,5,7,21]},{"term_id":"R-HSA-8953854","term_label":"Metabolism of RNA","supporting_discovery_ids":[9,11,26]},{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[8,13,25]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[16,17,22,31]},{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[6,10]},{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[24]},{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[30]},{"term_id":"R-HSA-8953897","term_label":"Cellular responses to stimuli","supporting_discovery_ids":[0,3,13,15]}],"complexes":[],"partners":["NF90","HNRNPH1","RPTOR","PIK3R1","IGF2BP2","METTL3"],"other_free_text":[]},"mechanistic_narrative":"RBM3 is a cold-shock RNA-binding protein that functions as a broad translational and post-transcriptional regulator, coupling environmental stress sensing to mRNA fate, miRNA biogenesis, and cell survival across neuronal, immune, and proliferative contexts. Its N-terminal RRM domain (βαββαβ topology) binds RNA via a beta-sheet/loop interface and forms temperature-dependent oligomers; RBM3 associates with 60S ribosomal subunits in an RNA-independent manner and enhances global protein synthesis, polysome assembly, and IRES-mediated cap-independent translation of its own mRNA, while also regulating local synaptic translation in neurons [PMID:15684048, PMID:11470798, PMID:34837346, PMID:33310754]. RBM3 stabilizes specific target mRNAs — including Yap1, GAS6, SOX11, ARPC2, MMP9, and RTN3 — through 3′UTR binding, promotes pre-miRNA processing at the Dicer step, and regulates alternative splicing of CD44 [PMID:30037926, PMID:22145045, PMID:23667174, PMID:28238655]. Cold-induced RBM3 expression is controlled transcriptionally by NF-κB p65 and TrkB/PLCγ1/pCREB signaling, and post-transcriptionally by temperature-sensitive inclusion of a poison exon repressed by HNRNPH1; RBM3 is required for hypothermia-induced neuroprotection, mediating synapse regeneration through the RTN3 axis, suppressing PERK–eIF2α–CHOP ER stress via NF90, exerting negative feedback on ERK signaling through DUSP6, and intrinsically restraining innate lymphoid cell activation [PMID:37248947, PMID:25607368, PMID:26472337, PMID:33563652, PMID:35908044]."},"prefetch_data":{"uniprot":{"accession":"P98179","full_name":"RNA-binding protein 3","aliases":["RNA-binding motif protein 3","RNPL"],"length_aa":157,"mass_kda":17.2,"function":"Cold-inducible mRNA binding protein that enhances global protein synthesis at both physiological and mild hypothermic temperatures. Reduces the relative abundance of microRNAs, when overexpressed. Enhances phosphorylation of translation initiation factors and active polysome formation (By similarity)","subcellular_location":"Nucleus; Cytoplasm; Cell projection, dendrite","url":"https://www.uniprot.org/uniprotkb/P98179/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/RBM3","classification":"Not Classified","n_dependent_lines":0,"n_total_lines":1208,"dependency_fraction":0.0},"opencell":{"profiled":true,"resolved_as":"","ensg_id":"ENSG00000102317","cell_line_id":"CID001480","localizations":[{"compartment":"cytoplasmic","grade":3},{"compartment":"nucleoplasm","grade":3},{"compartment":"nuclear_punctae","grade":2}],"interactors":[{"gene":"YLPM1","stoichiometry":0.2},{"gene":"BLM","stoichiometry":0.2},{"gene":"PHF14","stoichiometry":0.2},{"gene":"HNRNPK","stoichiometry":0.2},{"gene":"WDR82","stoichiometry":0.2}],"url":"https://opencell.sf.czbiohub.org/target/CID001480","total_profiled":1310},"omim":[{"mim_id":"300027","title":"RNA-BINDING MOTIF PROTEIN 3; RBM3","url":"https://www.omim.org/entry/300027"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Enhanced","locations":[{"location":"Nucleoplasm","reliability":"Enhanced"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/RBM3"},"hgnc":{"alias_symbol":["IS1-RNPL"],"prev_symbol":[]},"alphafold":{"accession":"P98179","domains":[{"cath_id":"3.30.70.330","chopping":"16-80","consensus_level":"high","plddt":81.8857,"start":16,"end":80}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/P98179","model_url":"https://alphafold.ebi.ac.uk/files/AF-P98179-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-P98179-F1-predicted_aligned_error_v6.png","plddt_mean":63.22},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=RBM3","jax_strain_url":"https://www.jax.org/strain/search?query=RBM3"},"sequence":{"accession":"P98179","fasta_url":"https://rest.uniprot.org/uniprotkb/P98179.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/P98179/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/P98179"}},"corpus_meta":[{"pmid":"15075239","id":"PMC_15075239","title":"Oxygen-regulated expression of the 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research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — multiple cell lines and multiple stress conditions, single lab\",\n      \"pmids\": [\"9245737\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"The 5' leader of Rbm3 mRNA contains an internal ribosome entry site (IRES) that mediates cap-independent translation, with activity enhanced up to 5-fold at mild hypothermia (33°C) compared to 37°C, explaining how Rbm3 protein levels increase even when global cap-dependent translation is suppressed by cold.\",\n      \"method\": \"Dicistronic reporter mRNA transfection in cells and cell-free lysates; IRES activity assay at different temperatures\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — in vitro and cell-based reconstitution of IRES activity with temperature-dependent functional readout\",\n      \"pmids\": [\"11470798\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"The Rbm3 mRNA IRES is highly modular, composed of at least 9 discrete cis-acting sequences including a 22-nt IRES module, a 10-nt enhancer, and 2 inhibitory sequences; the 22-nt module binds directly to 40S ribosomal subunits to facilitate translation initiation.\",\n      \"method\": \"Deletion and mutational analysis of IRES; 40S ribosomal subunit binding assay; cytoplasmic protein binding studies\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — mutagenesis combined with ribosome binding assay in vitro\",\n      \"pmids\": [\"12824175\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"RBM3 (and CIRP) transcription is induced by hypoxia independently of HIF-1 and mitochondria, as shown in HIF-1α-deficient, HIF-1β-deficient, and mitochondria-depleted cells; induction is blocked by actinomycin-D and respiratory chain inhibitors, and confirmed by nuclear run-on assays.\",\n      \"method\": \"Nuclear run-on assay; actinomycin-D treatment; HIF-1-deficient cell lines; mitochondria-depleted cells; respiratory chain inhibitors\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 — nuclear run-on assays plus multiple genetic/pharmacological controls\",\n      \"pmids\": [\"15075239\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"Rbm3 overexpression in mouse neuroblastoma N2a cells enhances global protein synthesis 3-fold; a fraction of Rbm3 associates with 60S ribosomal subunits in an RNA-independent manner; Rbm3 expression alters microRNA levels (reduces a complex sedimenting between gradient top and 40S subunits that contains microRNA).\",\n      \"method\": \"Protein synthesis assay (radioactive incorporation); polysome profiling; sucrose gradient fractionation; c-Myc fusion protein overexpression\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 — multiple orthogonal methods in single study; strong mechanistic link\",\n      \"pmids\": [\"15684048\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"RBM3 localizes to dendrites in neurons, co-fractionates with heavy mRNA granules and translation machinery components in sucrose gradients, and overexpression of RBM3 isoforms enhances global translation, active polysome formation, and initiation factor activation in neuronal cell lines; the isoform lacking a spliced arginine shows higher dendritic localization.\",\n      \"method\": \"Sucrose gradient fractionation; immunofluorescence in dissociated neurons; overexpression of alternatively spliced isoforms; polysome profiling\",\n      \"journal\": \"Journal of neurochemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods, direct localization tied to functional consequence\",\n      \"pmids\": [\"17403028\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"RBM3 overexpression in NIH3T3 and SW480 cells increases cell proliferation and anchorage-independent growth; RBM3 knockdown in HCT116 cells causes growth arrest, mitotic catastrophe with nuclear cyclin B1 accumulation and phosphorylation of Cdc25c, Chk1, Chk2; RBM3 enhances COX-2, IL-8, and VEGF mRNA stability and translation.\",\n      \"method\": \"siRNA knockdown; forced overexpression; soft agar colony assay; tumor xenograft; caspase assays; mRNA stability and translation assays\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods across cell types and in vivo xenograft\",\n      \"pmids\": [\"18427544\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"RBM3 knockdown in fibroblasts and HEK293 cells reduces cell viability and leads to cell death without caspase-3-mediated apoptosis; RBM3 overexpression rescues cells from serum starvation-induced death and is associated with increased translation rates (measured by radiolabeled amino acid incorporation).\",\n      \"method\": \"siRNA knockdown; overexpression; cell viability assay; radiolabeled amino acid incorporation for translation measurement\",\n      \"journal\": \"Pediatric research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — clean KD/OE with defined phenotype and direct translation measurement\",\n      \"pmids\": [\"19770690\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"RBM3 is required for hypothermia-induced neuroprotection in neurons; RBM3 overexpression reduces PARP cleavage, prevents internucleosomal DNA fragmentation, and reduces LDH release; siRNA knockdown of RBM3 significantly diminishes the neuroprotective effect of hypothermia.\",\n      \"method\": \"siRNA knockdown; vector-driven overexpression; primary neurons, PC12 cells, cortical organotypic slice cultures; PARP cleavage assay; DNA fragmentation assay; LDH release assay\",\n      \"journal\": \"Neurobiology of disease\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal gain/loss-of-function across multiple neuronal models with defined molecular phenotypes\",\n      \"pmids\": [\"21527344\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"RBM3 is an essential regulator of miRNA biogenesis at the Dicer processing step: RBM3 knockdown downregulates >60% of detectable miRNAs in neuronal cells (affecting ~70 nt precursor levels without changing primary transcripts or Dicer activity); RBM3 binds directly to ~70 nt pre-miRNA intermediates and promotes their association with active Dicer complexes.\",\n      \"method\": \"miRNA array; Northern blot; PCR; RBM3 knockdown/overexpression; pre-miRNA binding assay; Dicer activity assay; subcellular fractionation for nuclear transport\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 — direct binding assay combined with multiple orthogonal methods establishing mechanism at the Dicer step\",\n      \"pmids\": [\"22145045\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"RBM3-deficient (Rbm3−/−) mouse embryonic fibroblasts show markedly increased G2-phase cell accumulation compared to controls, indicating a role for RBM3 in G2-phase cell cycle control.\",\n      \"method\": \"Generation of Rbm3 knockout mice; cell cycle analysis of MEFs by flow cytometry\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — clean KO with defined cell cycle phenotype, single lab\",\n      \"pmids\": [\"21684257\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"RBM3 overexpression or culture at 32°C suppresses alternative splicing of CD44 variant v8-v10 and increases standard CD44s isoform in prostate cancer cells; RBM3 silencing increases CD44v8-v10 to CD44s ratio; elevated CD44v8-v10 interferes with MMP9-mediated cleavage of CD44s and suppresses cyclin D1 expression, linking RBM3 to stress-regulated RNA splicing and stem cell-like properties.\",\n      \"method\": \"RBM3 overexpression; siRNA silencing; RT-PCR for CD44 isoforms; soft agar colony assay; in vivo tumorigenicity\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal gain/loss-of-function with direct molecular readout of splicing and downstream pathway\",\n      \"pmids\": [\"23667174\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"RBM3 mediates synapse regeneration after cooling in the brain; failure to induce RBM3 in prion-infected and 5XFAD mouse models impairs synapse reassembly after cooling; RBM3 overexpression (by hypothermic boosting or lentiviral delivery) restores synapse regeneration, prevents behavioral deficits and neuronal loss, and prolongs survival; RBM3 knockdown exacerbates synapse loss.\",\n      \"method\": \"Prion and 5XFAD mouse models; lentiviral RBM3 overexpression; cooling experiments; synapse quantification; behavioral testing; survival analysis; RBM3 siRNA knockdown\",\n      \"journal\": \"Nature\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal gain/loss-of-function in multiple in vivo models with defined synaptic and behavioral phenotypes; replicated across two disease models\",\n      \"pmids\": [\"25607368\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"RBM3 inhibits the PERK-eIF2α-CHOP ER stress pathway through cooperation with NF90; RBM3 knockout exacerbates PERK-eIF2α-CHOP signaling in hippocampal slices; overexpression of RBM3 prevents PERK phosphorylation; affinity purification-mass spectrometry, Co-IP, and proximity ligation assay identify NF90 as a novel RBM3 interactor and show NF90 interacts with PERK in an RNA-dependent manner.\",\n      \"method\": \"RBM3 knockout mouse hippocampal slices; siRNA knockdown; overexpression in HEK293 cells; affinity purification-mass spectrometry; co-immunoprecipitation; proximity ligation assay; Western blot for PERK/eIF2α/CHOP phosphorylation\",\n      \"journal\": \"FASEB journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 — multiple orthogonal methods identifying novel interaction and mechanism; KO animal model used\",\n      \"pmids\": [\"26472337\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"RTN3 (reticulon protein) is a downstream effector of RBM3-mediated neuroprotection: cooling induces RTN3 expression partly by RBM3 binding to RTN3 mRNA; RTN3 overexpression independently prevents synaptic loss and cognitive deficits in a neurodegeneration mouse model; RTN3 knockdown eliminates cooling-induced neuroprotection.\",\n      \"method\": \"Ribosome profiling/translatome analysis; RBM3 knockdown/overexpression; lentiviral RTN3 overexpression; mouse neurodegeneration model; siRNA knockdown of RTN3; behavioral and synaptic assays\",\n      \"journal\": \"Current biology : CB\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal in vivo and in vitro methods establishing RBM3-RTN3 axis\",\n      \"pmids\": [\"28238655\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"NF-κB p65, phosphorylated at Ser276 by hypothermia, binds the RBM3 promoter and activates RBM3 transcription; inhibition of NF-κB p65 nuclear translocation by CAPE decreases RBM3 mRNA/protein and increases apoptosis that is rescued by RBM3 overexpression, establishing NF-κB p65 as a transcriptional activator of RBM3.\",\n      \"method\": \"NF-κB inhibitor CAPE; RBM3 overexpression; promoter binding analysis; Western blot for p65 phosphorylation; apoptosis assays\",\n      \"journal\": \"Journal of cellular biochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — promoter binding and rescue experiment, single lab\",\n      \"pmids\": [\"29388696\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"RBM3 directly interacts with PI3K subunit p85 in nasopharyngeal carcinoma cells, activating the AKT/Bcl-2 signaling pathway to confer radioresistance; AKT inhibition attenuates RBM3-mediated radioresistance.\",\n      \"method\": \"Co-immunoprecipitation; RBM3 knockdown and overexpression; AKT inhibitor treatment; apoptosis and clonogenic assays\",\n      \"journal\": \"American journal of translational research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — Co-IP identifying p85 binding, functional rescue with inhibitor, single lab\",\n      \"pmids\": [\"30662656\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"RBM3 interacts with IGF2 mRNA-binding protein 2 (IMP2), elevates its expression, and stimulates IGF2 release in the subgranular zone (SGZ) but not subventricular zone (SVZ) neural stem/progenitor cells after hypoxic-ischemic brain injury, establishing a niche-dependent RBM3-IMP2-IGF2 signaling pathway promoting neurogenesis.\",\n      \"method\": \"Co-immunoprecipitation; RBM3 overexpression/knockdown; ELISA for IGF2; BrdU incorporation; in vivo HI brain injury model; immunofluorescence\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal Co-IP and in vivo loss/gain of function with defined molecular pathway\",\n      \"pmids\": [\"31484925\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"RBM3 binds to the 3'UTR of Yap1 mRNA (at seven identified binding sites) and stabilizes it, thereby increasing YAP1 protein expression and affecting neuronal differentiation during embryonic brain development under cold stress.\",\n      \"method\": \"RNA-binding motif analysis; 3'UTR binding assays; RBM3 knockout in vivo; mRNA stability assay; RBM3 and YAP1 overexpression rescue in KO\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — direct RNA binding demonstrated with functional consequence in vivo; rescue experiment\",\n      \"pmids\": [\"30037926\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"RBM3 promotes cell proliferation in hepatocellular carcinoma by regulating biogenesis of the circular RNA SCD-circRNA 2; RBM3-mediated HCC cell proliferation is SCD-circRNA 2-dependent.\",\n      \"method\": \"RBM3 overexpression/modulation; RNA-seq; functional proliferation assays; circRNA quantification\",\n      \"journal\": \"EBioMedicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — gain/loss-of-function with defined molecular and cellular phenotype, single lab\",\n      \"pmids\": [\"31235426\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"RBM3 upregulates ARPC2 through post-transcriptional binding to ARPC2 3'UTR mRNA, promoting breast cancer cell proliferation and metastasis; knockdown of RBM3 decreases ARPC2 expression and reduces proliferation and metastasis.\",\n      \"method\": \"RBM3 knockdown; RNA pulldown/3'UTR binding; Western blot; proliferation and migration assays\",\n      \"journal\": \"International journal of oncology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — 3'UTR binding assay with functional follow-up, single lab\",\n      \"pmids\": [\"30720048\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"RBM3 knockdown in hippocampal neurons specifically alters local synaptic translation without affecting global cellular translation, and changes synaptic vesicle dynamics and neuronal activity patterns; RBM3 amounts change specifically at synapses over 24-hour cycles.\",\n      \"method\": \"Transcriptome analysis at different time points; siRNA knockdown; synaptic vesicle dynamics assay; local translation measurement; live imaging\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — KD with specific synaptic translation phenotype distinct from global translation, single lab\",\n      \"pmids\": [\"33310754\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Cooling induces RBM3 via activation of TrkB through PLCγ1 and pCREB signaling; RBM3 in turn exerts negative feedback on TrkB-induced ERK activation by inducing the ERK-specific phosphatase DUSP6; TrkB antagonism abrogates cooling-induced RBM3 induction and neuroprotection in prion-diseased mice; TrkB agonism induces RBM3 without cooling, preventing neurodegeneration.\",\n      \"method\": \"Pharmacological TrkB antagonism/agonism; RBM3-null neurons; prion disease mouse model; Western blot for PLCγ1, pCREB, ERK, DUSP6; synapse/neurodegeneration assays\",\n      \"journal\": \"Life science alliance\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal pharmacological and genetic approaches in vitro and in vivo establishing TrkB-PLCγ1-pCREB-RBM3-DUSP6 axis\",\n      \"pmids\": [\"33563652\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"NMR structure of the N-terminal 84-residue RNA recognition motif (RRM) of human RBM3 was solved; the RRM adopts a βαββαβ topology; the beta-sheet and two loops form the RNA-binding interface via hydrogen bond, pi-pi, and pi-cation interactions; RBM3 forms temperature-dependent oligomers in solution via the RRM domain, favored by decreasing temperature.\",\n      \"method\": \"Solution NMR structure determination; NMR-monitored titration with RNA; molecular dynamics simulation; size exclusion chromatography; chemical cross-linking; temperature-dependent NMR\",\n      \"journal\": \"The FEBS journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — NMR structure with functional RNA binding validation and molecular dynamics; multiple orthogonal methods\",\n      \"pmids\": [\"34837346\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"RBM3 interacts with Raptor to regulate the autophagy pathway in cardiomyocytes; RBM3 downregulation inhibits autophagy and promotes apoptosis under ischemia-reperfusion conditions.\",\n      \"method\": \"Co-immunoprecipitation confirming RBM3-Raptor interaction; RBM3 knockdown; autophagy and apoptosis assays in I/R model\",\n      \"journal\": \"Journal of physiology and biochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — Co-IP identifying Raptor binding with functional follow-up, single lab\",\n      \"pmids\": [\"36192581\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"RBM3 has a binding relationship with SLC7A11 mRNA; sodium butyrate promotes RBM3 expression, which indirectly downregulates SLC7A11, thereby promoting ferroptosis in endometrial cancer cells.\",\n      \"method\": \"RNA pulldown and mass spectrometry; transcriptome analysis; metabolome analysis; overexpression; subcutaneous xenograft model\",\n      \"journal\": \"Apoptosis\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — RNA pulldown with mass spectrometry confirming direct binding; functional in vitro and in vivo\",\n      \"pmids\": [\"37170022\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"RBM3 cold induction is regulated by a poison exon within the RBM3 gene whose temperature-dependent inclusion targets mRNA for nonsense-mediated decay; HNRNPH1 mediates cold-dependent exon skipping via its thermosensitive interaction with a G-rich motif within the poison exon; ASO-mediated exclusion of the poison exon raises RBM3 levels at normothermia and provides neuroprotection in prion-diseased mice.\",\n      \"method\": \"Genome-wide CRISPR-Cas9 KO screen in iPSC-derived neurons; splicing analysis; HNRNPH1 KO; ASO treatment; mouse prion disease model; neuronal loss and spongiosis quantification\",\n      \"journal\": \"The EMBO journal / EMBO molecular medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 — unbiased screen followed by mechanistic validation at RNA level, in vivo proof-of-concept; replicated across two papers (PMID 37248947 and 36946385)\",\n      \"pmids\": [\"37248947\", \"36946385\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"RBM3 upregulates N6-methyladenosine (m6A) methylation on CTNNB1 (β-catenin) mRNA in a METTL3-dependent manner, decreasing CTNNB1 mRNA stability and inactivating Wnt signaling, thereby inhibiting stemness remodeling of prostate cancer cells in the bone microenvironment.\",\n      \"method\": \"m6A methylation analysis; METTL3 dependence assay; RBM3 overexpression/silencing; co-culture with osteoblasts; Wnt signaling reporter\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct m6A modification with identified writer (METTL3) and functional outcome, single lab\",\n      \"pmids\": [\"36750551\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"RBM3 interacts with GAS6 mRNA to stabilize it, activating the Nrf2 signaling pathway and providing neuroprotection against acute brain injury.\",\n      \"method\": \"RNA immunoprecipitation assay; RBM3 overexpression; in vivo cerebral injury rat model; oxidative stress and apoptosis assays\",\n      \"journal\": \"Neuroscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — RIP confirming direct binding with functional downstream pathway, single lab\",\n      \"pmids\": [\"38555015\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"MZF1 acts as a transcription factor for RBM3, binding the RBM3 promoter (confirmed by ChIP and dual-luciferase assay) and promoting RBM3 transcription; this MZF1-RBM3 axis protects against oxidative stress and apoptosis in neuronal cells.\",\n      \"method\": \"ChIP assay; dual-luciferase reporter assay; MZF1 overexpression; RBM3 siRNA knockdown; oxidative stress and apoptosis assays\",\n      \"journal\": \"The Journal of toxicological sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — ChIP and luciferase assay establishing direct transcription factor binding with functional readout\",\n      \"pmids\": [\"34602532\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"RBM3 intrinsically suppresses lung innate lymphoid cell (ILC) activation and type 2/17 inflammation; Rbm3−/− ILCs from bone marrow chimeric mice show increased cytokine production; RBM3-deficient ILCs have increased expression of CysLT1R, and double-KO of Rbm3 and Cyslt1r reduces ST2+IL-17+ ILC accumulation, showing dependence on CysLT1R for part of RBM3's suppressive function.\",\n      \"method\": \"Rbm3−/− mice; Rbm3−/−Rag2−/− mice; bone marrow chimeric mice; allergen challenge model; RNA-seq of Rbm3−/− ILCs; double KO with Cyslt1r\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple genetic models with defined ILC-intrinsic suppressive function and pathway placement via double KO epistasis\",\n      \"pmids\": [\"35908044\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"RBM3 overexpression promotes AKT phosphorylation and enhances glucose metabolism and reduces apoptosis in skeletal muscle under cold exposure; O-GlcNAcylation of NF-κB p65 (mediated by OGT) upregulates RBM3, and OGT-specific skeletal muscle KO mice show decreased RBM3 and p65 phosphorylation, confirming the OGT-p65-RBM3-AKT axis.\",\n      \"method\": \"RBM3 overexpression in C2C12; OGT KO mice; wortmannin AKT inhibition; Western blot; glycolysis and apoptosis assays\",\n      \"journal\": \"Cell stress & chaperones\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — in vitro overexpression corroborated by tissue-specific KO mouse with defined signaling phenotype\",\n      \"pmids\": [\"36149580\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"FAK/Src signaling axis regulates cold-induced RBM3 gene transcription; FAK-specific inhibitor or FAK/Src siRNA silencing significantly abrogates hypothermia-induced RBM3 expression and blocks neuroprotective effects of mild hypothermia against rotenone.\",\n      \"method\": \"Pharmacological inhibitors of multiple signaling pathways; siRNA knockdown of FAK and Src; RT-PCR and Western blot for RBM3; cell viability assay\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — pharmacological and genetic silencing converge on FAK/Src as upstream regulator of RBM3 transcription\",\n      \"pmids\": [\"33272569\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"RBM3 stabilizes SOX11 mRNA, increasing its protein expression and promoting neuronal differentiation of human neural stem cells under mild hypothermia (35°C); identified by single-cell RNA sequencing and validated functionally.\",\n      \"method\": \"Single-cell RNA sequencing; RBM3 overexpression/knockdown; mRNA stability assay; in vitro and in vivo NSC transplantation; neuronal differentiation assay\",\n      \"journal\": \"iScience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — scRNA-seq discovery with functional mRNA stabilization validation in vitro and in vivo\",\n      \"pmids\": [\"38523796\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"RBM3 binds MMP9 mRNA (confirmed by RNA immunoprecipitation) and increases MMP9 mRNA stability in pulmonary microvascular endothelial cells, increasing cell permeability; RBM3 also reduces LPS-induced apoptosis possibly by suppressing p53 expression.\",\n      \"method\": \"RNA immunoprecipitation (RIP assay); actinomycin D mRNA stability assay; RBM3 overexpression/knockdown via lentivirus; cell permeability and tight junction assays\",\n      \"journal\": \"The Journal of surgical research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — RIP confirming direct binding with functional mRNA stability and permeability readout, single lab\",\n      \"pmids\": [\"33460967\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"RBM3 binds mRNAs in skeletal muscle predominantly at the junction between the coding region and 3'UTR (identified 14-nucleotide motif); bound transcripts are enriched for contractile apparatus, translation initiation, and proteasome complex gene sets, including Myh1, Eif4b, and Trim63.\",\n      \"method\": \"RNA immunoprecipitation followed by RNA sequencing (RIP-seq); gene set enrichment analysis; motif scanning; network analysis\",\n      \"journal\": \"Physiological reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — RIP-seq with motif identification; comprehensive but single lab\",\n      \"pmids\": [\"36750123\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"RBM3 overexpression promotes mitochondrial metabolism, cellular proliferation, and differentiation of myoblasts; proteomic analysis of RBM3-overexpressing C2C12 cells shows enrichment of fatty acid metabolism, RNA metabolism, and electron transport chain pathways; RBM3 is necessary for enhanced differentiation and maintenance of mitochondrial metabolism during hypothermic preconditioning.\",\n      \"method\": \"Hypothermic preconditioning; RBM3 overexpression; proteomic analysis; C2C12 and primary myoblast differentiation assays; mitochondrial metabolism assays\",\n      \"journal\": \"Communications biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — overexpression with proteomic profiling plus functional differentiation and metabolism assays\",\n      \"pmids\": [\"38688991\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"RBM3 is a cold-shock RNA-binding protein (with a defined βαββαβ RRM domain that binds RNA via its beta-sheet/loop interface and forms temperature-dependent oligomers) that is transcriptionally induced by hypothermia via NF-κB p65, FAK/Src, and TrkB/PLCγ1/pCREB signaling, and post-transcriptionally regulated by temperature-sensitive inclusion of a poison exon (repressed by HNRNPH1 at cold temperatures); it promotes global and local protein synthesis by associating with 60S ribosomal subunits, enhancing IRES-mediated cap-independent translation of its own mRNA, facilitating polysome assembly, and promoting pre-miRNA processing at the Dicer step; it also stabilizes specific target mRNAs (including Yap1, GAS6, SOX11, SLC7A11, ARPC2, MMP9), regulates CD44 alternative splicing, modulates the PERK-eIF2α-CHOP ER stress pathway via NF90, activates AKT and ERK signaling, interacts with Raptor to regulate autophagy, and mediates synapse regeneration through induction of RTN3, with negative feedback on TrkB-ERK signaling via DUSP6.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"RBM3 is a cold-shock RNA-binding protein that functions as a broad translational and post-transcriptional regulator, coupling environmental stress sensing to mRNA fate, miRNA biogenesis, and cell survival across neuronal, immune, and proliferative contexts. Its N-terminal RRM domain (βαββαβ topology) binds RNA via a beta-sheet/loop interface and forms temperature-dependent oligomers; RBM3 associates with 60S ribosomal subunits in an RNA-independent manner and enhances global protein synthesis, polysome assembly, and IRES-mediated cap-independent translation of its own mRNA, while also regulating local synaptic translation in neurons [PMID:15684048, PMID:11470798, PMID:34837346, PMID:33310754]. RBM3 stabilizes specific target mRNAs — including Yap1, GAS6, SOX11, ARPC2, MMP9, and RTN3 — through 3′UTR binding, promotes pre-miRNA processing at the Dicer step, and regulates alternative splicing of CD44 [PMID:30037926, PMID:22145045, PMID:23667174, PMID:28238655]. Cold-induced RBM3 expression is controlled transcriptionally by NF-κB p65 and TrkB/PLCγ1/pCREB signaling, and post-transcriptionally by temperature-sensitive inclusion of a poison exon repressed by HNRNPH1; RBM3 is required for hypothermia-induced neuroprotection, mediating synapse regeneration through the RTN3 axis, suppressing PERK–eIF2α–CHOP ER stress via NF90, exerting negative feedback on ERK signaling through DUSP6, and intrinsically restraining innate lymphoid cell activation [PMID:37248947, PMID:25607368, PMID:26472337, PMID:33563652, PMID:35908044].\",\n  \"teleology\": [\n    {\n      \"year\": 1997,\n      \"claim\": \"Identifying RBM3 as a cold- and translational-stress-inducible gene established the founding observation that mammalian cells mount a specific transcriptional response to mild hypothermia, paralleling bacterial cold-shock proteins.\",\n      \"evidence\": \"RT-PCR and Northern blot across multiple human cell lines at 32°C and with protein synthesis inhibitors\",\n      \"pmids\": [\"9245737\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism of cold sensing upstream of transcription unknown\", \"Protein-level induction not confirmed\"]\n    },\n    {\n      \"year\": 2001,\n      \"claim\": \"Discovery that the RBM3 5′ leader contains a cold-enhanced IRES resolved how RBM3 protein accumulates under hypothermia despite global cap-dependent translation suppression, revealing a feed-forward autoregulatory loop.\",\n      \"evidence\": \"Dicistronic reporter assays in cells and cell-free lysates at 33°C vs 37°C\",\n      \"pmids\": [\"11470798\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Trans-acting factors required for IRES activity not identified\", \"In vivo relevance of IRES not demonstrated\"]\n    },\n    {\n      \"year\": 2003,\n      \"claim\": \"Dissecting the modular architecture of the RBM3 IRES — identifying a 22-nt module that directly binds 40S subunits — provided the first cis-element map for a mammalian cold-responsive IRES.\",\n      \"evidence\": \"Deletion/mutational analysis with 40S ribosomal subunit binding assays in vitro\",\n      \"pmids\": [\"12824175\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structure of IRES-40S complex not resolved\", \"Contribution of each module in vivo unknown\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Demonstrating that RBM3 overexpression enhances global protein synthesis 3-fold and that RBM3 associates with 60S ribosomal subunits in an RNA-independent manner established RBM3 as a direct translational stimulator rather than merely a stress-response marker.\",\n      \"evidence\": \"Radioactive amino acid incorporation; polysome profiling and sucrose gradient fractionation in N2a cells\",\n      \"pmids\": [\"15684048\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism by which 60S association promotes translation initiation unclear\", \"Whether endogenous RBM3 levels are sufficient for this effect untested\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Localizing RBM3 to neuronal dendrites and showing isoform-dependent dendritic targeting extended the translational stimulation model to local synaptic translation, linking RBM3 to neuronal plasticity.\",\n      \"evidence\": \"Immunofluorescence in dissociated neurons; sucrose gradient co-fractionation with translation machinery; alternatively spliced isoform overexpression\",\n      \"pmids\": [\"17403028\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Specific dendritic mRNA targets not identified\", \"Functional consequence for synaptic plasticity not tested\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Showing that RBM3 knockdown causes mitotic catastrophe with G2 checkpoint activation, while overexpression promotes proliferation and stabilizes COX-2/VEGF/IL-8 mRNAs, revealed RBM3's dual role in cell cycle progression and selective mRNA stabilization relevant to oncogenesis.\",\n      \"evidence\": \"siRNA knockdown in HCT116; overexpression in NIH3T3/SW480; soft agar and xenograft assays; mRNA stability measurements\",\n      \"pmids\": [\"18427544\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct RNA binding to COX-2/VEGF/IL-8 not demonstrated with purified protein\", \"Mechanism of mitotic catastrophe induction not resolved\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Three concurrent advances — demonstrating RBM3's essential role in hypothermic neuroprotection, its regulation of miRNA biogenesis at the Dicer step, and G2-phase accumulation in Rbm3-null MEFs — collectively established RBM3 as a multi-level post-transcriptional regulator with in vivo physiological importance.\",\n      \"evidence\": \"siRNA/overexpression in primary neurons and organotypic slices (PARP cleavage, LDH release); miRNA arrays plus pre-miRNA binding and Dicer activity assays; Rbm3 KO MEFs with flow cytometry\",\n      \"pmids\": [\"21527344\", \"22145045\", \"21684257\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Specific miRNAs mediating neuroprotection not identified\", \"Relationship between miRNA regulation and cell cycle control unexplored\", \"Direct structural basis for pre-miRNA recognition unknown\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Identifying RBM3 as a regulator of CD44 alternative splicing (shifting v8-v10 to standard isoform) linked the protein's RNA-binding activity to splicing regulation with consequences for cancer stemness properties.\",\n      \"evidence\": \"RBM3 overexpression/silencing in prostate cancer cells; RT-PCR for CD44 isoforms; soft agar and in vivo tumorigenicity\",\n      \"pmids\": [\"23667174\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether RBM3 directly binds CD44 pre-mRNA or acts indirectly not resolved\", \"Generality of splicing regulation beyond CD44 unknown\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Two key findings — that RBM3 mediates synapse regeneration after cooling in neurodegenerative mouse models and that it suppresses ER stress via NF90-dependent inhibition of the PERK-eIF2α-CHOP pathway — provided the first in vivo mechanism linking cold-induced RBM3 to structural neuroprotection and proteostasis.\",\n      \"evidence\": \"Prion and 5XFAD mouse models with lentiviral RBM3 overexpression/knockdown; behavioral and survival assays; AP-MS, Co-IP, and PLA identifying NF90; PERK phosphorylation in RBM3 KO hippocampal slices\",\n      \"pmids\": [\"25607368\", \"26472337\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Full set of RBM3 target mRNAs driving synapse regeneration not catalogued\", \"Whether NF90 interaction is direct or RNA-bridged not fully resolved\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Identification of RTN3 as a downstream effector of RBM3-mediated neuroprotection, and of FAK/Src signaling as an upstream transcriptional inducer of RBM3, placed RBM3 within a defined signaling cascade from cold sensing to synaptic repair.\",\n      \"evidence\": \"Ribosome profiling identifying RTN3; lentiviral RTN3 rescue in neurodegeneration model; FAK/Src inhibitors and siRNA blocking RBM3 induction\",\n      \"pmids\": [\"28238655\", \"33272569\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How RBM3 binding to RTN3 mRNA enhances its translation not mechanistically resolved\", \"Integration of FAK/Src with NF-κB and TrkB pathways not established\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Demonstrating that NF-κB p65, phosphorylated at Ser276 by hypothermia, directly binds the RBM3 promoter established a concrete transcription factor–promoter mechanism for cold-induced RBM3 expression.\",\n      \"evidence\": \"CAPE inhibition of NF-κB; promoter binding analysis; rescue by RBM3 overexpression; apoptosis assays\",\n      \"pmids\": [\"29388696\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"ChIP-seq for p65 on RBM3 promoter not performed\", \"Relationship between p65 Ser276 phosphorylation and cold sensing unclear\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"A cluster of studies identified direct 3′UTR binding targets of RBM3 (Yap1, ARPC2 mRNAs) and an interacting partner (IMP2) linking RBM3 to IGF2 release in neural stem cells, expanding the catalogue of RBM3-stabilized transcripts and establishing niche-specific signaling downstream of RBM3.\",\n      \"evidence\": \"3′UTR binding assays with KO rescue for Yap1; RNA pulldown for ARPC2; Co-IP plus ELISA for IMP2-IGF2 axis in SGZ neural stem cells after HI injury\",\n      \"pmids\": [\"30037926\", \"30720048\", \"31484925\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Transcriptome-wide binding map in neurons not available at this point\", \"Whether IMP2 interaction is RNA-dependent not tested\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Discovery of the TrkB/PLCγ1/pCREB–RBM3–DUSP6 signaling axis, where RBM3 provides negative feedback on ERK via DUSP6, and that TrkB agonism can substitute for cooling to induce RBM3 and prevent neurodegeneration, defined a pharmacologically actionable pathway for RBM3 induction.\",\n      \"evidence\": \"TrkB antagonist/agonist treatment in prion-diseased mice and RBM3-null neurons; Western blot for PLCγ1, pCREB, ERK, DUSP6\",\n      \"pmids\": [\"33563652\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether TrkB-RBM3 axis operates outside the nervous system untested\", \"Mechanism by which RBM3 induces DUSP6 (transcriptional vs post-transcriptional) not determined\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Structural determination of the RBM3 RRM domain by NMR, revealing its βαββαβ fold, RNA-binding interface, and temperature-dependent oligomerization, provided the first atomic-level framework for understanding how RBM3 senses temperature and engages RNA.\",\n      \"evidence\": \"Solution NMR; NMR-monitored RNA titration; molecular dynamics; SEC and cross-linking for oligomerization\",\n      \"pmids\": [\"34837346\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structure of full-length RBM3 including glycine-rich C-terminal domain not solved\", \"Oligomer interface residues not mapped by mutagenesis\", \"No structure of RBM3 bound to a physiological RNA target\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Demonstrating that Rbm3-null innate lymphoid cells show cell-intrinsic hyperactivation and increased CysLT1R expression, with epistasis via double KO, extended RBM3 function beyond neurons into immune regulation.\",\n      \"evidence\": \"Rbm3−/− and Rbm3−/−Rag2−/− mice; bone marrow chimeras; allergen challenge; RNA-seq; Rbm3/Cyslt1r double KO\",\n      \"pmids\": [\"35908044\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct RNA targets mediating ILC suppression not identified\", \"Whether RBM3 regulates CysLT1R mRNA directly not tested\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Discovery that cold-induced RBM3 expression is post-transcriptionally controlled by a poison exon whose temperature-sensitive inclusion (regulated by HNRNPH1 binding a G-rich motif) triggers NMD, and that ASO-mediated exon skipping raises RBM3 at normothermia and is neuroprotective, provided both a mechanistic explanation for temperature-dependent regulation and a therapeutic strategy.\",\n      \"evidence\": \"Genome-wide CRISPR screen in iPSC-derived neurons; HNRNPH1 KO; ASO treatment in prion-diseased mice; splicing and NMD analysis\",\n      \"pmids\": [\"37248947\", \"36946385\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Thermosensor mechanism for HNRNPH1 binding affinity change not structurally defined\", \"Long-term safety of ASO-mediated RBM3 induction not assessed\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Identification of RBM3's ability to upregulate m6A methylation on CTNNB1 mRNA in a METTL3-dependent manner, and its binding to SLC7A11 and GAS6 mRNAs, expanded the post-transcriptional repertoire to include epitranscriptomic regulation and ferroptosis modulation.\",\n      \"evidence\": \"m6A analysis with METTL3 dependence for CTNNB1; RNA pulldown/MS for SLC7A11; RIP for GAS6; xenograft and brain injury models\",\n      \"pmids\": [\"36750551\", \"37170022\", \"38555015\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether RBM3 directly recruits METTL3 or acts indirectly not determined\", \"RBM3-SLC7A11 interaction described as indirect downregulation — direct binding specificity unclear\", \"Replication across independent labs needed\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"RIP-seq in skeletal muscle and scRNA-seq in neural stem cells refined the target mRNA landscape, identifying a preferred binding motif at the CDS-3′UTR junction and specific targets (SOX11, contractile apparatus genes) linking RBM3 to differentiation programs.\",\n      \"evidence\": \"RIP-seq with motif analysis in muscle; scRNA-seq with mRNA stability assays for SOX11 in NSCs; proteomic profiling of RBM3-overexpressing myoblasts\",\n      \"pmids\": [\"36750123\", \"38523796\", \"38688991\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"CLIP-based binding maps at nucleotide resolution not yet available\", \"Functional validation of most RIP-seq targets not performed\", \"Single-lab studies awaiting independent replication\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"Key open questions include: how does RBM3 oligomerization relate to its RNA-binding selectivity and translational stimulation; what is the full-length structure including the glycine-rich domain; how are target mRNA specificity and the diverse downstream outcomes (translation, splicing, miRNA biogenesis, m6A) coordinated; and whether ASO-mediated poison exon skipping is broadly therapeutic beyond prion disease.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No CLIP-seq map of endogenous RBM3 binding at nucleotide resolution\", \"No full-length structural model\", \"Mechanism linking 60S association to translation enhancement unresolved\", \"In vivo relevance of many target mRNAs identified in single studies not confirmed\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0003723\", \"supporting_discovery_ids\": [4, 5, 9, 18, 20, 23, 25, 28, 33, 34, 35]},\n      {\"term_id\": \"GO:0140098\", \"supporting_discovery_ids\": [9, 11]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [6, 7, 13, 22]},\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [11, 27]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [4, 5]},\n      {\"term_id\": \"GO:0005840\", \"supporting_discovery_ids\": [4, 5]},\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [9]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-392499\", \"supporting_discovery_ids\": [1, 2, 4, 5, 7, 21]},\n      {\"term_id\": \"R-HSA-8953854\", \"supporting_discovery_ids\": [9, 11, 26]},\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [8, 13, 25]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [16, 17, 22, 31]},\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [6, 10]},\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [24]},\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [30]},\n      {\"term_id\": \"R-HSA-8953897\", \"supporting_discovery_ids\": [0, 3, 13, 15]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\n      \"NF90\",\n      \"HNRNPH1\",\n      \"RPTOR\",\n      \"PIK3R1\",\n      \"IGF2BP2\",\n      \"METTL3\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}