{"gene":"RBM3","run_date":"2026-06-10T06:43:36","timeline":{"discoveries":[{"year":2001,"finding":"The 5' leader of Rbm3 mRNA contains an internal ribosome entry site (IRES) that mediates cap-independent translation; activity of this IRES is enhanced up to 5-fold at mild hypothermia (33°C) compared to 37°C, explaining increased Rbm3 protein levels despite global translational repression during cooling.","method":"Dicistronic reporter mRNA assays in transfected cells and cell-free lysates; deletion/mutational analysis of the 5' leader","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Strong — in vitro reconstitution with dicistronic reporters, cell-free lysates, and temperature-dependent functional validation; replicated across multiple cell lines","pmids":["11470798"],"is_preprint":false},{"year":2003,"finding":"The Rbm3 mRNA IRES is highly modular, comprising at least 9 discrete cis-acting sequences including a 22-nt IRES module that directly binds 40S ribosomal subunits, a 10-nt enhancer, and 2 inhibitory sequences; distinct cytoplasmic proteins bind each cis-acting element.","method":"Deletion and mutational analysis of IRES; binding studies with 40S ribosomal subunits; cytoplasmic protein binding assays","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Strong — in vitro reconstitution, mutagenesis, and direct ribosome-binding assays in a single rigorous study","pmids":["12824175"],"is_preprint":false},{"year":2005,"finding":"RBM3 overexpression causes a ~3-fold increase in global protein synthesis at both 37°C and 32°C; a fraction of RBM3 associates with 60S ribosomal subunits in an RNA-independent manner; RBM3 expression reduces the levels of a microRNA-containing complex that sediments between the top of sucrose gradients and 40S subunits, suggesting RBM3 enhances translation by modulating microRNA levels.","method":"Stable overexpression of c-Myc-tagged Rbm3 in N2a cells; [35S]-methionine incorporation assay; sucrose gradient sedimentation; RNA-independent ribosome association assay","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — in vitro functional assay (translation), biochemical fractionation, and ribosome association all in one study; single lab but multiple orthogonal methods","pmids":["15684048"],"is_preprint":false},{"year":2004,"finding":"RBM3 and CIRP mRNA upregulation by hypoxia is regulated at the level of gene transcription (shown by actinomycin-D inhibition and nuclear run-on assays), via a mechanism independent of HIF-1 and mitochondria.","method":"Nuclear run-on assays; actinomycin-D treatment; HIF-1α/β-deficient cell lines; mitochondria-depleted cells; respiratory chain inhibitors","journal":"Journal of cell science","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — nuclear run-on (direct transcription assay), multiple genetic and pharmacological controls across several cell lines","pmids":["15075239"],"is_preprint":false},{"year":2007,"finding":"Two alternatively spliced RBM3 isoforms differing by a single arginine residue localize to neuronal dendrites; both are post-translationally modified. Overexpression of either isoform enhances global translation, formation of active polysomes, and activation of initiation factors in neuronal cell lines. The isoform lacking the spliced arginine shows higher dendritic localization and is the only isoform present in astrocytes.","method":"Sucrose gradient fractionation; immunofluorescence localization; polysome profiling; transfection of neuronal cell lines; identification of post-translational modifications","journal":"Journal of neurochemistry","confidence":"Medium","confidence_rationale":"Tier 2–3 / Moderate — polysome profiling, direct localization, and translation assays; single lab with multiple methods","pmids":["17403028"],"is_preprint":false},{"year":2008,"finding":"RBM3 overexpression stabilizes COX-2, IL-8, and VEGF mRNAs and enhances their translation; RBM3 knockdown causes loss of translation of these transcripts and induces mitotic catastrophe associated with nuclear cyclin B1 accumulation and phosphorylation of Cdc25c, Chk1, and Chk2.","method":"siRNA knockdown; forced overexpression; mRNA stability assays; western blotting for cell cycle regulators; xenograft tumor growth assays","journal":"Oncogene","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple functional readouts (mRNA stability, translation, cell cycle markers) in single lab with both KD and OE experiments","pmids":["18427544"],"is_preprint":false},{"year":2011,"finding":"RBM3 is required for the Dicer processing step of miRNA biogenesis: RBM3 directly binds ~70 nt pre-miRNA intermediates and promotes their association with active Dicer complexes, overcoming an intrinsic inhibitory influence on pre-miRNP processing; knockdown of RBM3 downregulates >60% of detectable miRNAs without affecting primary transcript levels or Dicer activity itself.","method":"miRNA array; Northern blot; PCR; RBM3 knockdown/overexpression; mild hypothermia induction; mechanistic assays for Dicer activity and pre-miRNA cytoplasmic transport; direct binding of RBM3 to pre-miRNA intermediates","journal":"PloS one","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — direct RNA-binding assay, Dicer activity assay, nuclear export assay, and genome-wide miRNA profiling; multiple orthogonal methods","pmids":["22145045"],"is_preprint":false},{"year":2011,"finding":"RBM3 knockdown in neural cells significantly diminishes hypothermia-induced neuroprotection; vector-driven RBM3 overexpression reduces PARP cleavage, prevents internucleosomal DNA fragmentation, and reduces LDH release in the absence of hypothermia, establishing RBM3 as a mediator of hypothermic neuroprotection in neurons.","method":"siRNA knockdown; vector overexpression; PARP cleavage assay; DNA fragmentation assay; LDH release assay in primary neurons, PC12 cells, and organotypic slice cultures","journal":"Neurobiology of disease","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — loss- and gain-of-function with multiple apoptosis readouts in several neuronal model systems; single lab","pmids":["21527344"],"is_preprint":false},{"year":2011,"finding":"RBM3 knockout MEFs show markedly increased G2-phase accumulation compared to wild-type MEFs, revealing a role for RBM3 in G2-phase cell cycle control.","method":"Generation of Rbm3-/- mice; cell cycle analysis of mouse embryonic fibroblasts by flow cytometry","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic knockout model with cell cycle flow cytometry; single lab, single method","pmids":["21684257"],"is_preprint":false},{"year":2013,"finding":"RBM3 overexpression or culturing cells at 32°C suppresses alternative RNA splicing of CD44 variant v8-v10 and increases expression of standard CD44s isoform in prostate cancer cells; conversely, RBM3 silencing or soft-agar culture increases the CD44v8-v10:CD44s mRNA ratio, linking RBM3 to stress-regulated alternative splicing of CD44.","method":"RBM3 overexpression and siRNA knockdown; RT-PCR for CD44 isoforms; soft-agar culture; in vivo tumor growth assay","journal":"Cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — both gain- and loss-of-function with isoform-specific RT-PCR readout; single lab","pmids":["23667174"],"is_preprint":false},{"year":2015,"finding":"RBM3 deficiency in mouse models of neurodegeneration (prion disease and 5XFAD) correlates with failure of synapse regeneration after cooling; RBM3 overexpression (lentiviral or by hypothermia pre-treatment) restores synapse reassembly, prevents behavioral deficits and neuronal loss, and prolongs survival; RBM3 knockdown exacerbates synapse loss and accelerates disease.","method":"RBM3 lentiviral overexpression and shRNA knockdown in mouse brain; synapse counting; behavioral testing; survival analysis in prion and 5XFAD mouse models","journal":"Nature","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple in vivo models, both gain- and loss-of-function, multiple orthogonal readouts (synapses, behavior, survival); published in Nature","pmids":["25607368"],"is_preprint":false},{"year":2015,"finding":"RBM3 inhibits PERK phosphorylation and attenuates the PERK-eIF2α-CHOP ER stress pathway; this occurs through RBM3's cooperation with NF90, which is a novel PERK-interacting protein; RBM3's interaction with NF90 is RNA-dependent and is required for regulation of PERK activity.","method":"RBM3 knockout hippocampal slice cultures; siRNA knockdown and overexpression in HEK293 cells; thapsigargin/tunicamycin ER stress induction; affinity purification with mass spectrometry; co-immunoprecipitation; proximity ligation assay","journal":"FASEB journal","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — AP-MS, reciprocal Co-IP, proximity ligation assay, and genetic KO model; multiple orthogonal methods in single rigorous study","pmids":["26472337"],"is_preprint":false},{"year":2017,"finding":"RTN3 is a downstream effector of RBM3 neuroprotection: RBM3 directly binds RTN3 mRNA and drives its increased expression during cooling; RTN3 knockdown eliminates cooling-induced neuroprotection in mice; lentiviral RTN3 overexpression prevents synaptic loss and cognitive deficits in a neurodegeneration mouse model independently of RBM3.","method":"Translatome profiling; RBM3 KD/OE; RTN3 shRNA in vivo; lentiviral RTN3 overexpression; RNA binding assays; synaptic and behavioral assays","journal":"Current biology : CB","confidence":"High","confidence_rationale":"Tier 2 / Strong — direct RNA binding demonstrated, in vivo loss- and gain-of-function for both RBM3 and RTN3, with orthogonal mechanistic and phenotypic readouts","pmids":["28238655"],"is_preprint":false},{"year":2018,"finding":"RBM3 overexpression activates ERK and p38 phosphorylation to stimulate osteoblast differentiation; ERK inhibition decreases Runx2 expression downstream of RBM3, placing RBM3 upstream of the ERK-Runx2 axis in osteoblast differentiation.","method":"RBM3 overexpression and siRNA knockdown; ERK/p38 inhibitor treatment; osteogenic gene expression (Runx2, OC); mineralization assay","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic OE and KD plus pharmacological inhibitors; single lab with multiple readouts","pmids":["29505791"],"is_preprint":false},{"year":2018,"finding":"Cooling activates NF-κB p65 phosphorylation at Ser276, which then binds to a specific element in the RBM3 gene promoter to transcriptionally activate RBM3 expression; CAPE (NF-κB inhibitor) prevents RBM3 induction and increases apoptosis, which is rescued by RBM3 overexpression.","method":"NF-κB p65 chromatin immunoprecipitation of RBM3 promoter; CAPE treatment; RBM3 OE rescue experiments; western blot and RT-PCR","journal":"Journal of cellular biochemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP identifying direct promoter binding, pharmacological inhibition, and rescue by OE; single lab","pmids":["29388696"],"is_preprint":false},{"year":2018,"finding":"RBM3 directly interacts with PI3K subunit p85 in NPC cells, and RBM3 overexpression enhances radioresistance through activation of the AKT/Bcl-2 signaling pathway; AKT inhibition attenuates RBM3-mediated radioresistance.","method":"Co-immunoprecipitation of RBM3 with PI3K p85; RBM3 KD and OE; AKT inhibitor; apoptosis and survival assays","journal":"American journal of translational research","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single Co-IP for physical interaction; functional pathway data from 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 in the subventricular zone (SVZ) of the brain, establishing a niche-dependent RBM3-IMP2-IGF2 signaling pathway that promotes neurogenesis after hypoxic-ischemic injury.","method":"Co-immunoprecipitation; lentiviral RBM3 OE/KD in vivo; IGF2 ELISA; NSC proliferation and differentiation assays in SGZ and SVZ","journal":"Nature communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP establishing physical interaction, in vivo lentiviral manipulation, zone-specific functional readouts; single lab","pmids":["31484925"],"is_preprint":false},{"year":2019,"finding":"RBM3 binds directly to the 3'UTR of Yap1 mRNA (at seven predicted binding sites) and regulates its stability; RBM3 knockout during cold stress exacerbates neuronal differentiation defects in the embryonic brain, which are partially rescued by YAP1 overexpression.","method":"RNA binding motif analysis; 3'UTR binding assays; RBM3 KO mice subjected to maternal cold stress; in utero electroporation rescue with YAP1 OE","journal":"The Journal of cell biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct 3'UTR binding and in vivo genetic rescue; single lab","pmids":["30037926"],"is_preprint":false},{"year":2019,"finding":"RBM3 binds and stabilizes ARPC2 mRNA via its 3'UTR (RNA pull-down assay), and ARPC2 mediates RBM3-driven breast cancer cell proliferation and metastasis.","method":"RNA immunoprecipitation/RNA pull-down; RBM3 KD; ARPC2 KD; proliferation and invasion assays","journal":"International journal of oncology","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single lab, single RNA pull-down method for binding; functional rescue not fully shown","pmids":["30720048"],"is_preprint":false},{"year":2019,"finding":"RBM3 has a binding relationship with SLC7A11 mRNA (shown by RNA pull-down and mass spectrometry); RBM3 upregulation (induced by sodium butyrate) leads to decreased SLC7A11 expression and promotes ferroptosis in endometrial cancer cells.","method":"RNA pull-down with mass spectrometry; RBM3 OE/KD; SLC7A11 expression; ferroptosis markers (ROS, lipid peroxidation, GSH/GSSG); xenograft model","journal":"Apoptosis","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — RNA pull-down + MS for binding, in vivo xenograft validation; single lab","pmids":["37170022"],"is_preprint":false},{"year":2020,"finding":"RBM3 knockdown in hippocampal neurons specifically alters local synaptic translation without affecting global cellular translation; RBM3 levels change over 24 h primarily at synapses and RBM3 knockdown alters synaptic vesicle dynamics and neuronal activity patterns.","method":"RBM3 knockdown in rat hippocampal neuron cultures; STED microscopy; synaptic vesicle imaging; local translation assay; 24 h transcriptome analysis","journal":"The Journal of neuroscience","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct subcellular localization imaging tied to functional consequence (local translation), loss-of-function with specific readout; single lab","pmids":["33310754"],"is_preprint":false},{"year":2021,"finding":"Cooling activates TrkB via PLCγ1 and pCREB signaling to induce RBM3 expression; RBM3 in turn negatively feeds back on TrkB-induced ERK activation by inducing its specific phosphatase DUSP6; RBM3-null neurons lose cold-induced structural plasticity; TrkB agonism induces RBM3 without cooling and prevents neurodegeneration.","method":"Pharmacological antagonism and genetic reduction of TrkB and downstream mediators; RBM3-null neuron cultures; PLCγ1 and pCREB signaling assays; DUSP6 induction assay; prion disease mouse model with TrkB inhibition; TrkB agonist treatment","journal":"Life science alliance","confidence":"High","confidence_rationale":"Tier 2 / Strong — epistasis via multiple pharmacological and genetic tools, in vitro and in vivo, with negative feedback mechanism defined; multiple orthogonal methods","pmids":["33563652"],"is_preprint":false},{"year":2021,"finding":"RBM3 NMR structure of the N-terminal RRM domain (84 residues) reveals a βαββαβ topology; NMR-monitored titrations and MD simulations identify the β-sheet and two loops as the RNA-binding interface; RBM3 forms oligomers in solution via RRM domain interactions that are favored by decreased temperature, potentially linking oligomerization to cold-shock function.","method":"Solution NMR structure determination; NMR-monitored RNA titration; molecular dynamics simulations; size exclusion chromatography; chemical cross-linking","journal":"The FEBS journal","confidence":"High","confidence_rationale":"Tier 1 / Moderate — NMR structure with functional validation by RNA binding titration and MD; multiple orthogonal structural/biochemical methods in one study","pmids":["34837346"],"is_preprint":false},{"year":2021,"finding":"RBM3 interacts with MMP9 mRNA (RIP assay) and increases MMP9 mRNA stability, contributing to increased microvascular endothelial cell permeability; RBM3 also reduces LPS-induced apoptosis by suppressing p53 expression.","method":"RNA immunoprecipitation (RIP); actinomycin D mRNA stability assay; RBM3 OE/KD stable cell lines; cell permeability assay; p53 western blot","journal":"The Journal of surgical research","confidence":"Medium","confidence_rationale":"Tier 2–3 / Moderate — direct RIP assay plus mRNA stability assay; single lab with two orthogonal methods","pmids":["33460967"],"is_preprint":false},{"year":2022,"finding":"RBM3 interacts with Raptor (a component of mTORC1) to regulate the autophagy pathway in cardiomyocytes; RBM3 knockdown inhibits autophagy and promotes apoptosis in ischemia-reperfusion conditions.","method":"Co-immunoprecipitation of RBM3 with Raptor; RBM3 KD; autophagy markers; apoptosis assay in I/R model","journal":"Journal of physiology and biochemistry","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single Co-IP for physical interaction; single lab, limited functional follow-up","pmids":["36192581"],"is_preprint":false},{"year":2023,"finding":"A poison exon within the RBM3 gene (responsible for nonsense-mediated decay of RBM3 mRNA) is solely responsible for its cold-induced expression; HNRNPH1 mediates cold-dependent skipping of this poison exon via thermosensitive interaction with a G-rich motif within the exon; ASO-mediated exclusion of the poison exon yields high RBM3 levels at normothermia and provides neuroprotection in prion-diseased mice.","method":"Genome-wide CRISPR-Cas9 KO screen in RBM3-reporter iPSC-derived neurons; splicing analysis; HNRNPH1 KO/KD; NMR/structural analysis of temperature-sensitive G-rich motif binding; genetic deletion of poison exon; ASO treatment in prion mouse model","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — genome-wide CRISPR screen, mechanistic splicing analysis, structural interaction, genetic removal, and in vivo ASO rescue; multiple orthogonal approaches","pmids":["37248947"],"is_preprint":false},{"year":2023,"finding":"A poison exon in the RBM3 gene is solely responsible for cold-induced RBM3 expression; genetic removal or ASO-mediated exclusion of this exon yields sustained high RBM3 levels in mouse brains at normothermia; a single ASO administration provides long-lasting neuroprotection in prion-diseased mice, preventing neuronal loss and spongiosis.","method":"Genetic deletion of poison exon; ASO treatment (FDA-approved chemistry); western blot for RBM3; neuropathology in prion mouse model","journal":"EMBO molecular medicine","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic and ASO-mediated manipulation with in vivo neuropathological readout; independent from HNRNPH1 paper; consistent mechanistic conclusion","pmids":["36946385"],"is_preprint":false},{"year":2023,"finding":"RBM3 upregulates N6-methyladenosine (m6A) methylation on CTNNB1 mRNA in a manner dependent on the methyltransferase METTL3, resulting in decreased CTNNB1 mRNA stability and inactivation of Wnt/β-catenin signaling; this suppresses osteoblast-induced stemness remodeling of prostate cancer cells.","method":"Co-culture with osteoblasts; m6A methylation assay on CTNNB1 mRNA; METTL3 dependence assay; CTNNB1 mRNA stability; Wnt signaling and stemness markers","journal":"Cell death & disease","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — m6A methylation assay and mRNA stability with METTL3 dependence; single lab with multiple mechanistic assays","pmids":["36750551"],"is_preprint":false},{"year":2024,"finding":"RBM3 deficiency leads to transcriptome-wide pre-mRNA splicing alterations that are reversed by RBM3 re-expression from a cDNA; an MS2 tethering assay shows RBM3 regulates splice site selection when recruited between competing 5' splice sites; the RRM domain alone is sufficient for splicing regulation.","method":"RNA-seq of Rbm3-deficient cells; RBM3 cDNA rescue; MS2 tethering assay with competing 5' splice sites; RRM domain truncation","journal":"RNA biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — transcriptome-wide analysis plus mechanistic tethering assay with domain mapping; single lab","pmids":["39387568"],"is_preprint":false},{"year":2024,"finding":"RBM3 binds and stabilizes MEF2C mRNA; MEF2C then binds to the promoters of tight junction proteins ZO-1 and occludin to enhance their transcription; RBM3 downregulation by Aβ1-42 decreases MEF2C/ZO-1/occludin levels and increases blood-brain barrier permeability.","method":"RNA immunoprecipitation (RIP) of RBM3-MEF2C mRNA; MEF2C ChIP on ZO-1/occludin promoters; luciferase reporter; RBM3 and MEF2C KD; BBB permeability assay","journal":"Biochimica et biophysica acta. Molecular cell research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — RIP plus ChIP plus promoter reporter assays; single lab with multiple mechanistic methods","pmids":["38670534"],"is_preprint":false},{"year":2024,"finding":"RBM3 binds and stabilizes GAS6 mRNA (shown by RNA immunoprecipitation) and thereby activates Nrf2 signaling to reduce oxidative stress and inflammation in acute brain injury models; RBM3 overexpression reduces neurological deficits in a rat cerebral injury model.","method":"RNA immunoprecipitation (RIP) of RBM3-GAS6 mRNA; RBM3 OE in vivo and in vitro; Nrf2 pathway assays; behavioral and histological readouts","journal":"Neuroscience","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single RIP assay for binding; single lab; limited validation of mechanistic chain","pmids":["38555015"],"is_preprint":false},{"year":2024,"finding":"RBM3 promotes mitochondrial metabolism and myoblast differentiation; RBM3 overexpression at 37°C is sufficient to enhance mitochondrial metabolism, cellular proliferation, and differentiation of C2C12 and primary myoblasts; proteomic analysis shows RBM3 OE enriches pathways of fatty acid metabolism, RNA metabolism, and electron transport chain.","method":"Cold-shock proteomics; RBM3 OE/KD in C2C12 and primary myoblasts; mitochondrial metabolism assays; differentiation assays; quantitative proteomics","journal":"Communications biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — proteomics plus functional OE/KD with metabolic and differentiation assays; single lab with multiple orthogonal methods","pmids":["38688991"],"is_preprint":false},{"year":2024,"finding":"Mild hypothermia (35°C) promotes neuronal differentiation of human neural stem cells via RBM3; RBM3 stabilizes SOX11 mRNA and increases SOX11 protein expression, leading to increased neuronal differentiation; RBM3-SOX11 axis was identified by single-cell RNA sequencing and validated by RBM3 KD.","method":"Single-cell RNA sequencing; RBM3 KD; mRNA stability assay for SOX11; in vitro and in vivo NSC differentiation assays","journal":"iScience","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — scRNA-seq plus mRNA stability and in vivo validation; single lab","pmids":["38523796"],"is_preprint":false},{"year":2020,"finding":"FAK/Src signaling is required for hypothermia-induced RBM3 gene transcription: FAK-specific inhibition or FAK siRNA knockdown abrogates cold-induced RBM3 expression; Src (downstream of FAK) is also required; FAK/Src inactivation abolishes the neuroprotective effects of mild hypothermia against rotenone.","method":"Signaling pathway inhibitor screen; FAK siRNA; Src siRNA/inhibitor; RT-PCR and western blot for RBM3; neuroprotection assay","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — pharmacological and genetic convergence on FAK/Src; single lab with multiple inhibitors and siRNAs","pmids":["33272569"],"is_preprint":false},{"year":2021,"finding":"RBM3 overexpression increases β-catenin signaling in colorectal cancer cells by inactivating GSK3β, leading to decreased β-catenin phosphorylation, increased nuclear β-catenin, and enhanced TCF/LEF transcriptional activity, thereby inducing cancer stem cell properties.","method":"Dox-inducible RBM3 OE; β-catenin nuclear fractionation; TCF/LEF luciferase reporter; GSK3β phosphorylation; GSK3β inhibitor (BIO); side population and spheroid assays","journal":"Molecular carcinogenesis","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reporter assay, nuclear fractionation, and pharmacological convergence; single lab","pmids":["26331352"],"is_preprint":false},{"year":2021,"finding":"MZF1 is a transcription factor that directly binds the RBM3 promoter and promotes RBM3 transcription; MZF1 overexpression reduces oxidative stress and apoptosis in rotenone-treated neurons in an RBM3-dependent manner.","method":"ChIP assay; dual-luciferase reporter assay for MZF1-RBM3 promoter binding; MZF1 OE; RBM3 siRNA rescue; apoptosis and ROS assays","journal":"The Journal of toxicological sciences","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct ChIP and reporter assay for transcription factor binding; functional rescue by RBM3 siRNA; single lab","pmids":["34602532"],"is_preprint":false}],"current_model":"RBM3 is a cold-shock RNA-binding protein (RRM + RGG domain) whose expression is transcriptionally activated during hypothermia via NF-κB p65 and FAK/Src/TrkB signaling, and post-transcriptionally controlled by temperature-sensitive poison exon inclusion (regulated by HNRNPH1 splicing factor); the protein directly binds 40S and 60S ribosomal subunits, pre-miRNA intermediates (promoting Dicer processing), and numerous target mRNAs (via its RRM domain identified by NMR structure) to stabilize them and enhance their translation, thereby globally increasing protein synthesis; RBM3 also regulates alternative splicing genome-wide and interacts with partners including NF90 (to inhibit PERK/eIF2α ER stress signaling), IMP2 (to stimulate IGF2 release for neurogenesis), Raptor (to regulate autophagy), and PI3K-p85; collectively these activities underlie RBM3's roles in synapse regeneration and neuroprotection, cell cycle progression (G2 control and G1/S transition), cancer stem cell maintenance, and protection from apoptosis."},"narrative":{"mechanistic_narrative":"RBM3 is a cold-shock RNA-binding protein that acts as a master post-transcriptional effector of the hypothermic response, coupling temperature sensing to selective control of mRNA stability, translation, and splicing to produce neuroprotection, regulate the cell cycle, and modulate cancer cell behavior [PMID:25607368, PMID:15684048]. Its own induction during cooling is controlled at multiple levels: a temperature-sensitive poison exon whose cold-dependent skipping (mediated by HNRNPH1 binding a G-rich motif) determines RBM3 levels and is the sole driver of cold-induced expression [PMID:37248947, PMID:36946385]; an internal ribosome entry site in the 5' leader that supports cap-independent translation enhanced at mild hypothermia [PMID:11470798, PMID:12824175]; and transcriptional activation through converging FAK/Src, TrkB-PLCγ1-CREB, and NF-κB p65 signaling that feed into the RBM3 promoter [PMID:33272569, PMID:33563652, PMID:29388696]. Once expressed, RBM3 associates with 40S and 60S ribosomal subunits and globally increases protein synthesis, and it promotes Dicer-dependent processing of pre-miRNA intermediates [PMID:15684048, PMID:12824175, PMID:22145045]. Through its N-terminal RRM domain, which adopts a βαββαβ fold and engages RNA via its β-sheet and loops, RBM3 binds and stabilizes numerous target mRNAs—including RTN3, Yap1, SOX11, and MEF2C—to drive synapse regeneration, neuronal differentiation, and barrier integrity [PMID:34837346, PMID:28238655, PMID:30037926, PMID:38523796, PMID:38670534], and the RRM alone is sufficient to direct alternative splice-site selection genome-wide [PMID:39387568]. RBM3 also functions through protein partners, cooperating with NF90 to suppress PERK-eIF2α ER stress signaling and with IMP2 to stimulate IGF2 release for neurogenesis [PMID:26472337, PMID:31484925]. These activities make RBM3 a mediator of hypothermic neuroprotection: it is required for cooling-induced synapse reassembly and survival in prion and 5XFAD mouse models, and ASO-driven removal of its poison exon delivers sustained neuroprotection at normothermia [PMID:25607368, PMID:37248947, PMID:36946385].","teleology":[{"year":2001,"claim":"Established how RBM3 protein rises during cooling despite global translational repression, identifying a cap-independent translation mechanism for its own mRNA.","evidence":"Dicistronic reporter assays and 5'-leader mutagenesis in cells and cell-free lysates showing a hypothermia-enhanced IRES","pmids":["11470798"],"confidence":"High","gaps":["Trans-acting factors mediating temperature sensitivity not identified","Quantitative contribution of IRES versus transcription to total induction unresolved"]},{"year":2003,"claim":"Dissected the RBM3 IRES into discrete modules and showed a 22-nt element directly binds 40S subunits, defining the cis-architecture of cap-independent translation.","evidence":"IRES deletion/mutational analysis with 40S ribosomal subunit binding and cytoplasmic protein binding assays","pmids":["12824175"],"confidence":"High","gaps":["Identities of the element-specific cytoplasmic proteins not determined","Link to temperature regulation not mechanistically closed"]},{"year":2004,"claim":"Showed RBM3 induction by environmental stress is transcriptional and HIF-1/mitochondria-independent, distinguishing it from canonical hypoxia responses.","evidence":"Nuclear run-on and actinomycin-D assays in HIF-1-deficient and mitochondria-depleted cells","pmids":["15075239"],"confidence":"High","gaps":["Responsible transcription factor not identified in this study","Promoter elements not mapped"]},{"year":2005,"claim":"Demonstrated RBM3 functionally enhances global translation and associates with ribosomes, linking it to protein synthesis output.","evidence":"Stable overexpression in N2a cells with [35S]-Met incorporation, sucrose gradient sedimentation, and RNA-independent 60S association","pmids":["15684048"],"confidence":"High","gaps":["Mechanism connecting ribosome binding to enhanced translation unresolved","Specificity for particular transcripts not addressed"]},{"year":2007,"claim":"Connected RBM3 isoforms to dendritic localization and polysome formation, implicating RBM3 in neuronal translation.","evidence":"Polysome profiling, immunofluorescence, and translation assays of two spliced isoforms in neuronal cell lines","pmids":["17403028"],"confidence":"Medium","gaps":["Functional significance of the single-arginine difference unclear","Post-translational modifications not mapped to function"]},{"year":2008,"claim":"Linked RBM3 to mRNA stabilization of specific oncogenic transcripts and to cell-cycle integrity, showing loss triggers mitotic catastrophe.","evidence":"siRNA knockdown and overexpression with mRNA stability assays, cell-cycle marker blots, and xenograft growth","pmids":["18427544"],"confidence":"Medium","gaps":["Direct RBM3-target mRNA binding not demonstrated here","Mechanism of cyclin B1/Cdc25c dysregulation indirect"]},{"year":2011,"claim":"Defined a role for RBM3 in miRNA biogenesis, showing it promotes Dicer processing of pre-miRNAs and broadly sustains miRNA levels.","evidence":"Direct pre-miRNA binding, Dicer activity and export assays, and genome-wide miRNA profiling under RBM3 knockdown/overexpression","pmids":["22145045"],"confidence":"High","gaps":["Structural basis of pre-miRNA recognition not defined","Relationship between miRNA modulation and translation enhancement not integrated"]},{"year":2011,"claim":"Established RBM3 as a causal mediator of hypothermic neuroprotection and as a G2-phase cell-cycle regulator using loss- and gain-of-function.","evidence":"siRNA/overexpression with PARP, DNA fragmentation, and LDH assays in neurons; flow cytometry of Rbm3-/- MEFs","pmids":["21527344","21684257"],"confidence":"Medium","gaps":["Molecular targets mediating neuroprotection not yet identified","G2 control mechanism not mechanistically linked to RNA targets"]},{"year":2013,"claim":"Showed RBM3 regulates stress-responsive alternative splicing of CD44, extending its activity beyond mRNA stability into splice-isoform control.","evidence":"Overexpression/knockdown with CD44 isoform RT-PCR, soft-agar and in vivo tumor assays in prostate cancer cells","pmids":["23667174"],"confidence":"Medium","gaps":["Direct splicing mechanism not demonstrated at this stage","Whether effect is direct or via cofactors unresolved"]},{"year":2015,"claim":"Demonstrated in vivo that RBM3 drives cooling-induced synapse regeneration and rescues neurodegeneration, establishing therapeutic relevance.","evidence":"Lentiviral overexpression and shRNA in prion and 5XFAD mice with synapse counting, behavior, and survival","pmids":["25607368"],"confidence":"High","gaps":["Downstream effector mRNAs not identified in this study","Mechanism of synapse reassembly left open"]},{"year":2015,"claim":"Identified RBM3-NF90 cooperation as a brake on PERK-eIF2α-CHOP ER stress signaling, linking RBM3 to proteostasis defense.","evidence":"AP-MS, reciprocal Co-IP, proximity ligation, and KO hippocampal slices under ER stress induction","pmids":["26472337"],"confidence":"High","gaps":["RNA dependence of the interaction not molecularly defined","Direct PERK inhibition mechanism not resolved"]},{"year":2017,"claim":"Identified RTN3 as a direct RBM3 mRNA target and downstream neuroprotective effector, providing a molecular chain for synapse protection.","evidence":"Translatome profiling, RBM3 KD/OE, direct RNA binding, and in vivo RTN3 shRNA and overexpression rescue","pmids":["28238655"],"confidence":"High","gaps":["How RTN3 mechanistically protects synapses not fully resolved","Additional parallel effectors not excluded"]},{"year":2018,"claim":"Mapped upstream transcriptional control of RBM3, defining NF-κB p65 (Ser276) promoter binding and ERK/p38 signaling in differentiation contexts.","evidence":"p65 ChIP on RBM3 promoter with CAPE inhibition and rescue; ERK/p38 inhibitor and Runx2 readouts in osteoblasts","pmids":["29388696","29505791"],"confidence":"Medium","gaps":["How cooling activates p65 phosphorylation unresolved","ERK-Runx2 link to RNA-binding activity not established"]},{"year":2019,"claim":"Expanded RBM3's direct mRNA target set (Yap1, IGF2/IMP2 axis) and showed niche-dependent control of neurogenesis and neuronal differentiation.","evidence":"Co-IP with IMP2, 3'UTR binding to Yap1, KO mice under cold stress, and zone-specific NSC assays with rescue","pmids":["31484925","30037926"],"confidence":"Medium","gaps":["Basis of niche specificity (SGZ vs SVZ) unexplained","Direct versus indirect mRNA stabilization not always separated"]},{"year":2019,"claim":"Implicated RBM3 in cancer phenotypes through stabilization of ARPC2 and SLC7A11 mRNAs, affecting metastasis and ferroptosis.","evidence":"RNA pull-down/RIP with mass spectrometry, RBM3 OE/KD, and proliferation/ferroptosis and xenograft readouts","pmids":["30720048","37170022"],"confidence":"Low","gaps":["ARPC2 binding rests on a single RNA pull-down without full rescue","Direct versus indirect regulation of SLC7A11 not firmly established"]},{"year":2020,"claim":"Refined RBM3's translational role to the synaptic compartment, showing it controls local but not global translation in hippocampal neurons.","evidence":"Knockdown with STED imaging, synaptic vesicle imaging, and local translation assays in rat neurons","pmids":["33310754"],"confidence":"Medium","gaps":["Local mRNA targets at synapses not enumerated","Reconciliation with global translation enhancement reports unresolved"]},{"year":2021,"claim":"Defined the TrkB-PLCγ1-CREB signaling route inducing RBM3 and an RBM3-DUSP6 negative feedback loop, and provided the first RRM structure with RNA-binding interface and cold-favored oligomerization.","evidence":"Pharmacological/genetic epistasis with TrkB agonist in vivo; solution NMR structure with RNA titration, MD, and cross-linking","pmids":["33563652","34837346"],"confidence":"High","gaps":["Functional role of cold-favored oligomerization not directly demonstrated","Connection between RRM structure and specific target selection open"]},{"year":2021,"claim":"Connected RBM3 to oncogenic Wnt/β-catenin activation and identified MZF1 as a direct transcriptional activator of RBM3.","evidence":"TCF/LEF reporters, β-catenin fractionation, GSK3β inhibitor in CRC cells; MZF1 ChIP and reporter with RBM3-siRNA rescue","pmids":["26331352","34602532"],"confidence":"Medium","gaps":["How RBM3 inactivates GSK3β mechanistically unclear","Whether β-catenin effect is direct mRNA-mediated not shown"]},{"year":2021,"claim":"Extended RBM3 mRNA-stabilization activity to MMP9 in endothelial permeability and to Raptor-mediated autophagy in cardiomyocytes.","evidence":"RIP and actinomycin D stability assays for MMP9; Co-IP with Raptor and autophagy/apoptosis readouts in I/R","pmids":["33460967","36192581"],"confidence":"Low","gaps":["Raptor interaction rests on a single Co-IP without reciprocal validation","Mechanism of p53 suppression by RBM3 unresolved"]},{"year":2023,"claim":"Identified the temperature-sensitive poison exon and HNRNPH1 as the core thermosensor governing cold-induced RBM3 expression, and validated ASO exclusion as a normothermic neuroprotective strategy.","evidence":"Genome-wide CRISPR screen in iPSC neurons, HNRNPH1 KO/KD, structural G-rich motif analysis, poison-exon deletion, and ASO in prion mice","pmids":["37248947","36946385"],"confidence":"High","gaps":["How HNRNPH1 itself senses temperature not fully resolved","Interplay between poison-exon control and IRES/transcriptional inputs not integrated"]},{"year":2023,"claim":"Showed RBM3 can act as a tumor suppressor via m6A-dependent destabilization of CTNNB1, opposing Wnt-driven stemness in prostate cancer.","evidence":"Osteoblast co-culture, m6A assays on CTNNB1 with METTL3 dependence, mRNA stability, and stemness markers","pmids":["36750551"],"confidence":"Medium","gaps":["How RBM3 couples to METTL3-mediated m6A deposition unclear","Reconciliation with pro-Wnt CRC findings not addressed"]},{"year":2024,"claim":"Established RBM3 as a genome-wide alternative-splicing regulator whose RRM domain alone directs splice-site selection, mechanistically grounding earlier splicing observations.","evidence":"RNA-seq of Rbm3-deficient cells with cDNA rescue and MS2 tethering between competing 5' splice sites with RRM truncation","pmids":["39387568"],"confidence":"Medium","gaps":["Sequence determinants of splice-site target selection not defined","Relationship between splicing role and mRNA-stabilization role not unified"]},{"year":2024,"claim":"Broadened RBM3's stabilized-target repertoire (SOX11, MEF2C, GAS6) and metabolic functions, linking it to neuronal differentiation, BBB integrity, antioxidant signaling, and myoblast mitochondrial metabolism.","evidence":"RIP and mRNA stability assays, scRNA-seq, in vivo injury models, and proteomic/metabolic profiling in NSCs, endothelial cells, and myoblasts","pmids":["38523796","38670534","38555015","38688991"],"confidence":"Medium","gaps":["GAS6 regulation rests on a single RIP assay","Whether metabolic effects are direct mRNA-mediated or downstream not separated"]},{"year":null,"claim":"How RBM3's distinct biochemical activities—ribosome association, target-mRNA stabilization, splice-site selection, and pre-miRNA processing—are coordinated and directed to specific transcripts via a single RRM remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unified model linking RRM-based RNA recognition to target selectivity across functions","Context-dependent tumor-suppressive versus oncogenic roles unreconciled","Direct genome-wide binding map (e.g. CLIP) not present in the corpus"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0003723","term_label":"RNA binding","supporting_discovery_ids":[6,12,17,18,19,22,28,29,32]},{"term_id":"GO:0045182","term_label":"translation regulator activity","supporting_discovery_ids":[0,2,4,20]},{"term_id":"GO:0140098","term_label":"catalytic activity, acting on RNA","supporting_discovery_ids":[6,28]}],"localization":[{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[1,2,6]},{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[3,14]}],"pathway":[{"term_id":"R-HSA-8953854","term_label":"Metabolism of RNA","supporting_discovery_ids":[6,28]},{"term_id":"R-HSA-392499","term_label":"Metabolism of proteins","supporting_discovery_ids":[0,2]},{"term_id":"R-HSA-8953897","term_label":"Cellular responses to stimuli","supporting_discovery_ids":[3,11,25]},{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[14,35]}],"complexes":[],"partners":["NF90","IMP2","PI3K P85","RAPTOR","HNRNPH1","METTL3"],"other_free_text":[]}},"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 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Overexpression of either isoform enhances global translation, formation of active polysomes, and activation of initiation factors in neuronal cell lines. The isoform lacking the spliced arginine shows higher dendritic localization and is the only isoform present in astrocytes.\",\n      \"method\": \"Sucrose gradient fractionation; immunofluorescence localization; polysome profiling; transfection of neuronal cell lines; identification of post-translational modifications\",\n      \"journal\": \"Journal of neurochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2–3 / Moderate — polysome profiling, direct localization, and translation assays; single lab with multiple methods\",\n      \"pmids\": [\"17403028\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"RBM3 overexpression stabilizes COX-2, IL-8, and VEGF mRNAs and enhances their translation; RBM3 knockdown causes loss of translation of these transcripts and induces mitotic catastrophe associated with nuclear cyclin B1 accumulation and phosphorylation of Cdc25c, Chk1, and Chk2.\",\n      \"method\": \"siRNA knockdown; forced overexpression; mRNA stability assays; western blotting for cell cycle regulators; xenograft tumor growth assays\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple functional readouts (mRNA stability, translation, cell cycle markers) in single lab with both KD and OE experiments\",\n      \"pmids\": [\"18427544\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"RBM3 is required for the Dicer processing step of miRNA biogenesis: RBM3 directly binds ~70 nt pre-miRNA intermediates and promotes their association with active Dicer complexes, overcoming an intrinsic inhibitory influence on pre-miRNP processing; knockdown of RBM3 downregulates >60% of detectable miRNAs without affecting primary transcript levels or Dicer activity itself.\",\n      \"method\": \"miRNA array; Northern blot; PCR; RBM3 knockdown/overexpression; mild hypothermia induction; mechanistic assays for Dicer activity and pre-miRNA cytoplasmic transport; direct binding of RBM3 to pre-miRNA intermediates\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — direct RNA-binding assay, Dicer activity assay, nuclear export assay, and genome-wide miRNA profiling; multiple orthogonal methods\",\n      \"pmids\": [\"22145045\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"RBM3 knockdown in neural cells significantly diminishes hypothermia-induced neuroprotection; vector-driven RBM3 overexpression reduces PARP cleavage, prevents internucleosomal DNA fragmentation, and reduces LDH release in the absence of hypothermia, establishing RBM3 as a mediator of hypothermic neuroprotection in neurons.\",\n      \"method\": \"siRNA knockdown; vector overexpression; PARP cleavage assay; DNA fragmentation assay; LDH release assay in primary neurons, PC12 cells, and organotypic slice cultures\",\n      \"journal\": \"Neurobiology of disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — loss- and gain-of-function with multiple apoptosis readouts in several neuronal model systems; single lab\",\n      \"pmids\": [\"21527344\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"RBM3 knockout MEFs show markedly increased G2-phase accumulation compared to wild-type MEFs, revealing a role for RBM3 in G2-phase cell cycle control.\",\n      \"method\": \"Generation of Rbm3-/- mice; cell cycle analysis of mouse embryonic fibroblasts by flow cytometry\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic knockout model with cell cycle flow cytometry; single lab, single method\",\n      \"pmids\": [\"21684257\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"RBM3 overexpression or culturing cells at 32°C suppresses alternative RNA splicing of CD44 variant v8-v10 and increases expression of standard CD44s isoform in prostate cancer cells; conversely, RBM3 silencing or soft-agar culture increases the CD44v8-v10:CD44s mRNA ratio, linking RBM3 to stress-regulated alternative splicing of CD44.\",\n      \"method\": \"RBM3 overexpression and siRNA knockdown; RT-PCR for CD44 isoforms; soft-agar culture; in vivo tumor growth assay\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — both gain- and loss-of-function with isoform-specific RT-PCR readout; single lab\",\n      \"pmids\": [\"23667174\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"RBM3 deficiency in mouse models of neurodegeneration (prion disease and 5XFAD) correlates with failure of synapse regeneration after cooling; RBM3 overexpression (lentiviral or by hypothermia pre-treatment) restores synapse reassembly, prevents behavioral deficits and neuronal loss, and prolongs survival; RBM3 knockdown exacerbates synapse loss and accelerates disease.\",\n      \"method\": \"RBM3 lentiviral overexpression and shRNA knockdown in mouse brain; synapse counting; behavioral testing; survival analysis in prion and 5XFAD mouse models\",\n      \"journal\": \"Nature\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple in vivo models, both gain- and loss-of-function, multiple orthogonal readouts (synapses, behavior, survival); published in Nature\",\n      \"pmids\": [\"25607368\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"RBM3 inhibits PERK phosphorylation and attenuates the PERK-eIF2α-CHOP ER stress pathway; this occurs through RBM3's cooperation with NF90, which is a novel PERK-interacting protein; RBM3's interaction with NF90 is RNA-dependent and is required for regulation of PERK activity.\",\n      \"method\": \"RBM3 knockout hippocampal slice cultures; siRNA knockdown and overexpression in HEK293 cells; thapsigargin/tunicamycin ER stress induction; affinity purification with mass spectrometry; co-immunoprecipitation; proximity ligation assay\",\n      \"journal\": \"FASEB journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — AP-MS, reciprocal Co-IP, proximity ligation assay, and genetic KO model; multiple orthogonal methods in single rigorous study\",\n      \"pmids\": [\"26472337\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"RTN3 is a downstream effector of RBM3 neuroprotection: RBM3 directly binds RTN3 mRNA and drives its increased expression during cooling; RTN3 knockdown eliminates cooling-induced neuroprotection in mice; lentiviral RTN3 overexpression prevents synaptic loss and cognitive deficits in a neurodegeneration mouse model independently of RBM3.\",\n      \"method\": \"Translatome profiling; RBM3 KD/OE; RTN3 shRNA in vivo; lentiviral RTN3 overexpression; RNA binding assays; synaptic and behavioral assays\",\n      \"journal\": \"Current biology : CB\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — direct RNA binding demonstrated, in vivo loss- and gain-of-function for both RBM3 and RTN3, with orthogonal mechanistic and phenotypic readouts\",\n      \"pmids\": [\"28238655\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"RBM3 overexpression activates ERK and p38 phosphorylation to stimulate osteoblast differentiation; ERK inhibition decreases Runx2 expression downstream of RBM3, placing RBM3 upstream of the ERK-Runx2 axis in osteoblast differentiation.\",\n      \"method\": \"RBM3 overexpression and siRNA knockdown; ERK/p38 inhibitor treatment; osteogenic gene expression (Runx2, OC); mineralization assay\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic OE and KD plus pharmacological inhibitors; single lab with multiple readouts\",\n      \"pmids\": [\"29505791\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Cooling activates NF-κB p65 phosphorylation at Ser276, which then binds to a specific element in the RBM3 gene promoter to transcriptionally activate RBM3 expression; CAPE (NF-κB inhibitor) prevents RBM3 induction and increases apoptosis, which is rescued by RBM3 overexpression.\",\n      \"method\": \"NF-κB p65 chromatin immunoprecipitation of RBM3 promoter; CAPE treatment; RBM3 OE rescue experiments; western blot and RT-PCR\",\n      \"journal\": \"Journal of cellular biochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP identifying direct promoter binding, pharmacological inhibition, and rescue by OE; single lab\",\n      \"pmids\": [\"29388696\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"RBM3 directly interacts with PI3K subunit p85 in NPC cells, and RBM3 overexpression enhances radioresistance through activation of the AKT/Bcl-2 signaling pathway; AKT inhibition attenuates RBM3-mediated radioresistance.\",\n      \"method\": \"Co-immunoprecipitation of RBM3 with PI3K p85; RBM3 KD and OE; AKT inhibitor; apoptosis and survival assays\",\n      \"journal\": \"American journal of translational research\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single Co-IP for physical interaction; functional pathway data from 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 in the subventricular zone (SVZ) of the brain, establishing a niche-dependent RBM3-IMP2-IGF2 signaling pathway that promotes neurogenesis after hypoxic-ischemic injury.\",\n      \"method\": \"Co-immunoprecipitation; lentiviral RBM3 OE/KD in vivo; IGF2 ELISA; NSC proliferation and differentiation assays in SGZ and SVZ\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP establishing physical interaction, in vivo lentiviral manipulation, zone-specific functional readouts; single lab\",\n      \"pmids\": [\"31484925\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"RBM3 binds directly to the 3'UTR of Yap1 mRNA (at seven predicted binding sites) and regulates its stability; RBM3 knockout during cold stress exacerbates neuronal differentiation defects in the embryonic brain, which are partially rescued by YAP1 overexpression.\",\n      \"method\": \"RNA binding motif analysis; 3'UTR binding assays; RBM3 KO mice subjected to maternal cold stress; in utero electroporation rescue with YAP1 OE\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct 3'UTR binding and in vivo genetic rescue; single lab\",\n      \"pmids\": [\"30037926\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"RBM3 binds and stabilizes ARPC2 mRNA via its 3'UTR (RNA pull-down assay), and ARPC2 mediates RBM3-driven breast cancer cell proliferation and metastasis.\",\n      \"method\": \"RNA immunoprecipitation/RNA pull-down; RBM3 KD; ARPC2 KD; proliferation and invasion assays\",\n      \"journal\": \"International journal of oncology\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single lab, single RNA pull-down method for binding; functional rescue not fully shown\",\n      \"pmids\": [\"30720048\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"RBM3 has a binding relationship with SLC7A11 mRNA (shown by RNA pull-down and mass spectrometry); RBM3 upregulation (induced by sodium butyrate) leads to decreased SLC7A11 expression and promotes ferroptosis in endometrial cancer cells.\",\n      \"method\": \"RNA pull-down with mass spectrometry; RBM3 OE/KD; SLC7A11 expression; ferroptosis markers (ROS, lipid peroxidation, GSH/GSSG); xenograft model\",\n      \"journal\": \"Apoptosis\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — RNA pull-down + MS for binding, in vivo xenograft validation; single lab\",\n      \"pmids\": [\"37170022\"],\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; RBM3 levels change over 24 h primarily at synapses and RBM3 knockdown alters synaptic vesicle dynamics and neuronal activity patterns.\",\n      \"method\": \"RBM3 knockdown in rat hippocampal neuron cultures; STED microscopy; synaptic vesicle imaging; local translation assay; 24 h transcriptome analysis\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct subcellular localization imaging tied to functional consequence (local translation), loss-of-function with specific readout; single lab\",\n      \"pmids\": [\"33310754\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Cooling activates TrkB via PLCγ1 and pCREB signaling to induce RBM3 expression; RBM3 in turn negatively feeds back on TrkB-induced ERK activation by inducing its specific phosphatase DUSP6; RBM3-null neurons lose cold-induced structural plasticity; TrkB agonism induces RBM3 without cooling and prevents neurodegeneration.\",\n      \"method\": \"Pharmacological antagonism and genetic reduction of TrkB and downstream mediators; RBM3-null neuron cultures; PLCγ1 and pCREB signaling assays; DUSP6 induction assay; prion disease mouse model with TrkB inhibition; TrkB agonist treatment\",\n      \"journal\": \"Life science alliance\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — epistasis via multiple pharmacological and genetic tools, in vitro and in vivo, with negative feedback mechanism defined; multiple orthogonal methods\",\n      \"pmids\": [\"33563652\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"RBM3 NMR structure of the N-terminal RRM domain (84 residues) reveals a βαββαβ topology; NMR-monitored titrations and MD simulations identify the β-sheet and two loops as the RNA-binding interface; RBM3 forms oligomers in solution via RRM domain interactions that are favored by decreased temperature, potentially linking oligomerization to cold-shock function.\",\n      \"method\": \"Solution NMR structure determination; NMR-monitored RNA titration; molecular dynamics simulations; size exclusion chromatography; chemical cross-linking\",\n      \"journal\": \"The FEBS journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — NMR structure with functional validation by RNA binding titration and MD; multiple orthogonal structural/biochemical methods in one study\",\n      \"pmids\": [\"34837346\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"RBM3 interacts with MMP9 mRNA (RIP assay) and increases MMP9 mRNA stability, contributing to increased microvascular endothelial cell permeability; RBM3 also reduces LPS-induced apoptosis by suppressing p53 expression.\",\n      \"method\": \"RNA immunoprecipitation (RIP); actinomycin D mRNA stability assay; RBM3 OE/KD stable cell lines; cell permeability assay; p53 western blot\",\n      \"journal\": \"The Journal of surgical research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2–3 / Moderate — direct RIP assay plus mRNA stability assay; single lab with two orthogonal methods\",\n      \"pmids\": [\"33460967\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"RBM3 interacts with Raptor (a component of mTORC1) to regulate the autophagy pathway in cardiomyocytes; RBM3 knockdown inhibits autophagy and promotes apoptosis in ischemia-reperfusion conditions.\",\n      \"method\": \"Co-immunoprecipitation of RBM3 with Raptor; RBM3 KD; autophagy markers; apoptosis assay in I/R model\",\n      \"journal\": \"Journal of physiology and biochemistry\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single Co-IP for physical interaction; single lab, limited functional follow-up\",\n      \"pmids\": [\"36192581\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"A poison exon within the RBM3 gene (responsible for nonsense-mediated decay of RBM3 mRNA) is solely responsible for its cold-induced expression; HNRNPH1 mediates cold-dependent skipping of this poison exon via thermosensitive interaction with a G-rich motif within the exon; ASO-mediated exclusion of the poison exon yields high RBM3 levels at normothermia and provides neuroprotection in prion-diseased mice.\",\n      \"method\": \"Genome-wide CRISPR-Cas9 KO screen in RBM3-reporter iPSC-derived neurons; splicing analysis; HNRNPH1 KO/KD; NMR/structural analysis of temperature-sensitive G-rich motif binding; genetic deletion of poison exon; ASO treatment in prion mouse model\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — genome-wide CRISPR screen, mechanistic splicing analysis, structural interaction, genetic removal, and in vivo ASO rescue; multiple orthogonal approaches\",\n      \"pmids\": [\"37248947\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"A poison exon in the RBM3 gene is solely responsible for cold-induced RBM3 expression; genetic removal or ASO-mediated exclusion of this exon yields sustained high RBM3 levels in mouse brains at normothermia; a single ASO administration provides long-lasting neuroprotection in prion-diseased mice, preventing neuronal loss and spongiosis.\",\n      \"method\": \"Genetic deletion of poison exon; ASO treatment (FDA-approved chemistry); western blot for RBM3; neuropathology in prion mouse model\",\n      \"journal\": \"EMBO molecular medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic and ASO-mediated manipulation with in vivo neuropathological readout; independent from HNRNPH1 paper; consistent mechanistic conclusion\",\n      \"pmids\": [\"36946385\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"RBM3 upregulates N6-methyladenosine (m6A) methylation on CTNNB1 mRNA in a manner dependent on the methyltransferase METTL3, resulting in decreased CTNNB1 mRNA stability and inactivation of Wnt/β-catenin signaling; this suppresses osteoblast-induced stemness remodeling of prostate cancer cells.\",\n      \"method\": \"Co-culture with osteoblasts; m6A methylation assay on CTNNB1 mRNA; METTL3 dependence assay; CTNNB1 mRNA stability; Wnt signaling and stemness markers\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — m6A methylation assay and mRNA stability with METTL3 dependence; single lab with multiple mechanistic assays\",\n      \"pmids\": [\"36750551\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"RBM3 deficiency leads to transcriptome-wide pre-mRNA splicing alterations that are reversed by RBM3 re-expression from a cDNA; an MS2 tethering assay shows RBM3 regulates splice site selection when recruited between competing 5' splice sites; the RRM domain alone is sufficient for splicing regulation.\",\n      \"method\": \"RNA-seq of Rbm3-deficient cells; RBM3 cDNA rescue; MS2 tethering assay with competing 5' splice sites; RRM domain truncation\",\n      \"journal\": \"RNA biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — transcriptome-wide analysis plus mechanistic tethering assay with domain mapping; single lab\",\n      \"pmids\": [\"39387568\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"RBM3 binds and stabilizes MEF2C mRNA; MEF2C then binds to the promoters of tight junction proteins ZO-1 and occludin to enhance their transcription; RBM3 downregulation by Aβ1-42 decreases MEF2C/ZO-1/occludin levels and increases blood-brain barrier permeability.\",\n      \"method\": \"RNA immunoprecipitation (RIP) of RBM3-MEF2C mRNA; MEF2C ChIP on ZO-1/occludin promoters; luciferase reporter; RBM3 and MEF2C KD; BBB permeability assay\",\n      \"journal\": \"Biochimica et biophysica acta. Molecular cell research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — RIP plus ChIP plus promoter reporter assays; single lab with multiple mechanistic methods\",\n      \"pmids\": [\"38670534\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"RBM3 binds and stabilizes GAS6 mRNA (shown by RNA immunoprecipitation) and thereby activates Nrf2 signaling to reduce oxidative stress and inflammation in acute brain injury models; RBM3 overexpression reduces neurological deficits in a rat cerebral injury model.\",\n      \"method\": \"RNA immunoprecipitation (RIP) of RBM3-GAS6 mRNA; RBM3 OE in vivo and in vitro; Nrf2 pathway assays; behavioral and histological readouts\",\n      \"journal\": \"Neuroscience\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single RIP assay for binding; single lab; limited validation of mechanistic chain\",\n      \"pmids\": [\"38555015\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"RBM3 promotes mitochondrial metabolism and myoblast differentiation; RBM3 overexpression at 37°C is sufficient to enhance mitochondrial metabolism, cellular proliferation, and differentiation of C2C12 and primary myoblasts; proteomic analysis shows RBM3 OE enriches pathways of fatty acid metabolism, RNA metabolism, and electron transport chain.\",\n      \"method\": \"Cold-shock proteomics; RBM3 OE/KD in C2C12 and primary myoblasts; mitochondrial metabolism assays; differentiation assays; quantitative proteomics\",\n      \"journal\": \"Communications biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — proteomics plus functional OE/KD with metabolic and differentiation assays; single lab with multiple orthogonal methods\",\n      \"pmids\": [\"38688991\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"Mild hypothermia (35°C) promotes neuronal differentiation of human neural stem cells via RBM3; RBM3 stabilizes SOX11 mRNA and increases SOX11 protein expression, leading to increased neuronal differentiation; RBM3-SOX11 axis was identified by single-cell RNA sequencing and validated by RBM3 KD.\",\n      \"method\": \"Single-cell RNA sequencing; RBM3 KD; mRNA stability assay for SOX11; in vitro and in vivo NSC differentiation assays\",\n      \"journal\": \"iScience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — scRNA-seq plus mRNA stability and in vivo validation; single lab\",\n      \"pmids\": [\"38523796\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"FAK/Src signaling is required for hypothermia-induced RBM3 gene transcription: FAK-specific inhibition or FAK siRNA knockdown abrogates cold-induced RBM3 expression; Src (downstream of FAK) is also required; FAK/Src inactivation abolishes the neuroprotective effects of mild hypothermia against rotenone.\",\n      \"method\": \"Signaling pathway inhibitor screen; FAK siRNA; Src siRNA/inhibitor; RT-PCR and western blot for RBM3; neuroprotection assay\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — pharmacological and genetic convergence on FAK/Src; single lab with multiple inhibitors and siRNAs\",\n      \"pmids\": [\"33272569\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"RBM3 overexpression increases β-catenin signaling in colorectal cancer cells by inactivating GSK3β, leading to decreased β-catenin phosphorylation, increased nuclear β-catenin, and enhanced TCF/LEF transcriptional activity, thereby inducing cancer stem cell properties.\",\n      \"method\": \"Dox-inducible RBM3 OE; β-catenin nuclear fractionation; TCF/LEF luciferase reporter; GSK3β phosphorylation; GSK3β inhibitor (BIO); side population and spheroid assays\",\n      \"journal\": \"Molecular carcinogenesis\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reporter assay, nuclear fractionation, and pharmacological convergence; single lab\",\n      \"pmids\": [\"26331352\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"MZF1 is a transcription factor that directly binds the RBM3 promoter and promotes RBM3 transcription; MZF1 overexpression reduces oxidative stress and apoptosis in rotenone-treated neurons in an RBM3-dependent manner.\",\n      \"method\": \"ChIP assay; dual-luciferase reporter assay for MZF1-RBM3 promoter binding; MZF1 OE; RBM3 siRNA rescue; apoptosis and ROS assays\",\n      \"journal\": \"The Journal of toxicological sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct ChIP and reporter assay for transcription factor binding; functional rescue by RBM3 siRNA; single lab\",\n      \"pmids\": [\"34602532\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"RBM3 is a cold-shock RNA-binding protein (RRM + RGG domain) whose expression is transcriptionally activated during hypothermia via NF-κB p65 and FAK/Src/TrkB signaling, and post-transcriptionally controlled by temperature-sensitive poison exon inclusion (regulated by HNRNPH1 splicing factor); the protein directly binds 40S and 60S ribosomal subunits, pre-miRNA intermediates (promoting Dicer processing), and numerous target mRNAs (via its RRM domain identified by NMR structure) to stabilize them and enhance their translation, thereby globally increasing protein synthesis; RBM3 also regulates alternative splicing genome-wide and interacts with partners including NF90 (to inhibit PERK/eIF2α ER stress signaling), IMP2 (to stimulate IGF2 release for neurogenesis), Raptor (to regulate autophagy), and PI3K-p85; collectively these activities underlie RBM3's roles in synapse regeneration and neuroprotection, cell cycle progression (G2 control and G1/S transition), cancer stem cell maintenance, and protection from apoptosis.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"RBM3 is a cold-shock RNA-binding protein that acts as a master post-transcriptional effector of the hypothermic response, coupling temperature sensing to selective control of mRNA stability, translation, and splicing to produce neuroprotection, regulate the cell cycle, and modulate cancer cell behavior [#10, #2]. Its own induction during cooling is controlled at multiple levels: a temperature-sensitive poison exon whose cold-dependent skipping (mediated by HNRNPH1 binding a G-rich motif) determines RBM3 levels and is the sole driver of cold-induced expression [#25, #26]; an internal ribosome entry site in the 5' leader that supports cap-independent translation enhanced at mild hypothermia [#0, #1]; and transcriptional activation through converging FAK/Src, TrkB-PLC\\u03b31-CREB, and NF-\\u03baB p65 signaling that feed into the RBM3 promoter [#33, #21, #14]. Once expressed, RBM3 associates with 40S and 60S ribosomal subunits and globally increases protein synthesis, and it promotes Dicer-dependent processing of pre-miRNA intermediates [#2, #1, #6]. Through its N-terminal RRM domain, which adopts a \\u03b2\\u03b1\\u03b2\\u03b2\\u03b1\\u03b2 fold and engages RNA via its \\u03b2-sheet and loops, RBM3 binds and stabilizes numerous target mRNAs\\u2014including RTN3, Yap1, SOX11, and MEF2C\\u2014to drive synapse regeneration, neuronal differentiation, and barrier integrity [#22, #12, #17, #32, #29], and the RRM alone is sufficient to direct alternative splice-site selection genome-wide [#28]. RBM3 also functions through protein partners, cooperating with NF90 to suppress PERK-eIF2\\u03b1 ER stress signaling and with IMP2 to stimulate IGF2 release for neurogenesis [#11, #16]. These activities make RBM3 a mediator of hypothermic neuroprotection: it is required for cooling-induced synapse reassembly and survival in prion and 5XFAD mouse models, and ASO-driven removal of its poison exon delivers sustained neuroprotection at normothermia [#10, #25, #26].\",\n  \"teleology\": [\n    {\n      \"year\": 2001,\n      \"claim\": \"Established how RBM3 protein rises during cooling despite global translational repression, identifying a cap-independent translation mechanism for its own mRNA.\",\n      \"evidence\": \"Dicistronic reporter assays and 5'-leader mutagenesis in cells and cell-free lysates showing a hypothermia-enhanced IRES\",\n      \"pmids\": [\"11470798\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Trans-acting factors mediating temperature sensitivity not identified\", \"Quantitative contribution of IRES versus transcription to total induction unresolved\"]\n    },\n    {\n      \"year\": 2003,\n      \"claim\": \"Dissected the RBM3 IRES into discrete modules and showed a 22-nt element directly binds 40S subunits, defining the cis-architecture of cap-independent translation.\",\n      \"evidence\": \"IRES deletion/mutational analysis with 40S ribosomal subunit binding and cytoplasmic protein binding assays\",\n      \"pmids\": [\"12824175\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Identities of the element-specific cytoplasmic proteins not determined\", \"Link to temperature regulation not mechanistically closed\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Showed RBM3 induction by environmental stress is transcriptional and HIF-1/mitochondria-independent, distinguishing it from canonical hypoxia responses.\",\n      \"evidence\": \"Nuclear run-on and actinomycin-D assays in HIF-1-deficient and mitochondria-depleted cells\",\n      \"pmids\": [\"15075239\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Responsible transcription factor not identified in this study\", \"Promoter elements not mapped\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Demonstrated RBM3 functionally enhances global translation and associates with ribosomes, linking it to protein synthesis output.\",\n      \"evidence\": \"Stable overexpression in N2a cells with [35S]-Met incorporation, sucrose gradient sedimentation, and RNA-independent 60S association\",\n      \"pmids\": [\"15684048\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism connecting ribosome binding to enhanced translation unresolved\", \"Specificity for particular transcripts not addressed\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Connected RBM3 isoforms to dendritic localization and polysome formation, implicating RBM3 in neuronal translation.\",\n      \"evidence\": \"Polysome profiling, immunofluorescence, and translation assays of two spliced isoforms in neuronal cell lines\",\n      \"pmids\": [\"17403028\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional significance of the single-arginine difference unclear\", \"Post-translational modifications not mapped to function\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Linked RBM3 to mRNA stabilization of specific oncogenic transcripts and to cell-cycle integrity, showing loss triggers mitotic catastrophe.\",\n      \"evidence\": \"siRNA knockdown and overexpression with mRNA stability assays, cell-cycle marker blots, and xenograft growth\",\n      \"pmids\": [\"18427544\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct RBM3-target mRNA binding not demonstrated here\", \"Mechanism of cyclin B1/Cdc25c dysregulation indirect\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Defined a role for RBM3 in miRNA biogenesis, showing it promotes Dicer processing of pre-miRNAs and broadly sustains miRNA levels.\",\n      \"evidence\": \"Direct pre-miRNA binding, Dicer activity and export assays, and genome-wide miRNA profiling under RBM3 knockdown/overexpression\",\n      \"pmids\": [\"22145045\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of pre-miRNA recognition not defined\", \"Relationship between miRNA modulation and translation enhancement not integrated\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Established RBM3 as a causal mediator of hypothermic neuroprotection and as a G2-phase cell-cycle regulator using loss- and gain-of-function.\",\n      \"evidence\": \"siRNA/overexpression with PARP, DNA fragmentation, and LDH assays in neurons; flow cytometry of Rbm3-/- MEFs\",\n      \"pmids\": [\"21527344\", \"21684257\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular targets mediating neuroprotection not yet identified\", \"G2 control mechanism not mechanistically linked to RNA targets\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Showed RBM3 regulates stress-responsive alternative splicing of CD44, extending its activity beyond mRNA stability into splice-isoform control.\",\n      \"evidence\": \"Overexpression/knockdown with CD44 isoform RT-PCR, soft-agar and in vivo tumor assays in prostate cancer cells\",\n      \"pmids\": [\"23667174\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct splicing mechanism not demonstrated at this stage\", \"Whether effect is direct or via cofactors unresolved\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Demonstrated in vivo that RBM3 drives cooling-induced synapse regeneration and rescues neurodegeneration, establishing therapeutic relevance.\",\n      \"evidence\": \"Lentiviral overexpression and shRNA in prion and 5XFAD mice with synapse counting, behavior, and survival\",\n      \"pmids\": [\"25607368\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Downstream effector mRNAs not identified in this study\", \"Mechanism of synapse reassembly left open\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Identified RBM3-NF90 cooperation as a brake on PERK-eIF2\\u03b1-CHOP ER stress signaling, linking RBM3 to proteostasis defense.\",\n      \"evidence\": \"AP-MS, reciprocal Co-IP, proximity ligation, and KO hippocampal slices under ER stress induction\",\n      \"pmids\": [\"26472337\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"RNA dependence of the interaction not molecularly defined\", \"Direct PERK inhibition mechanism not resolved\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Identified RTN3 as a direct RBM3 mRNA target and downstream neuroprotective effector, providing a molecular chain for synapse protection.\",\n      \"evidence\": \"Translatome profiling, RBM3 KD/OE, direct RNA binding, and in vivo RTN3 shRNA and overexpression rescue\",\n      \"pmids\": [\"28238655\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How RTN3 mechanistically protects synapses not fully resolved\", \"Additional parallel effectors not excluded\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Mapped upstream transcriptional control of RBM3, defining NF-\\u03baB p65 (Ser276) promoter binding and ERK/p38 signaling in differentiation contexts.\",\n      \"evidence\": \"p65 ChIP on RBM3 promoter with CAPE inhibition and rescue; ERK/p38 inhibitor and Runx2 readouts in osteoblasts\",\n      \"pmids\": [\"29388696\", \"29505791\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"How cooling activates p65 phosphorylation unresolved\", \"ERK-Runx2 link to RNA-binding activity not established\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Expanded RBM3's direct mRNA target set (Yap1, IGF2/IMP2 axis) and showed niche-dependent control of neurogenesis and neuronal differentiation.\",\n      \"evidence\": \"Co-IP with IMP2, 3'UTR binding to Yap1, KO mice under cold stress, and zone-specific NSC assays with rescue\",\n      \"pmids\": [\"31484925\", \"30037926\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Basis of niche specificity (SGZ vs SVZ) unexplained\", \"Direct versus indirect mRNA stabilization not always separated\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Implicated RBM3 in cancer phenotypes through stabilization of ARPC2 and SLC7A11 mRNAs, affecting metastasis and ferroptosis.\",\n      \"evidence\": \"RNA pull-down/RIP with mass spectrometry, RBM3 OE/KD, and proliferation/ferroptosis and xenograft readouts\",\n      \"pmids\": [\"30720048\", \"37170022\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"ARPC2 binding rests on a single RNA pull-down without full rescue\", \"Direct versus indirect regulation of SLC7A11 not firmly established\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Refined RBM3's translational role to the synaptic compartment, showing it controls local but not global translation in hippocampal neurons.\",\n      \"evidence\": \"Knockdown with STED imaging, synaptic vesicle imaging, and local translation assays in rat neurons\",\n      \"pmids\": [\"33310754\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Local mRNA targets at synapses not enumerated\", \"Reconciliation with global translation enhancement reports unresolved\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Defined the TrkB-PLC\\u03b31-CREB signaling route inducing RBM3 and an RBM3-DUSP6 negative feedback loop, and provided the first RRM structure with RNA-binding interface and cold-favored oligomerization.\",\n      \"evidence\": \"Pharmacological/genetic epistasis with TrkB agonist in vivo; solution NMR structure with RNA titration, MD, and cross-linking\",\n      \"pmids\": [\"33563652\", \"34837346\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Functional role of cold-favored oligomerization not directly demonstrated\", \"Connection between RRM structure and specific target selection open\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Connected RBM3 to oncogenic Wnt/\\u03b2-catenin activation and identified MZF1 as a direct transcriptional activator of RBM3.\",\n      \"evidence\": \"TCF/LEF reporters, \\u03b2-catenin fractionation, GSK3\\u03b2 inhibitor in CRC cells; MZF1 ChIP and reporter with RBM3-siRNA rescue\",\n      \"pmids\": [\"26331352\", \"34602532\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"How RBM3 inactivates GSK3\\u03b2 mechanistically unclear\", \"Whether \\u03b2-catenin effect is direct mRNA-mediated not shown\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Extended RBM3 mRNA-stabilization activity to MMP9 in endothelial permeability and to Raptor-mediated autophagy in cardiomyocytes.\",\n      \"evidence\": \"RIP and actinomycin D stability assays for MMP9; Co-IP with Raptor and autophagy/apoptosis readouts in I/R\",\n      \"pmids\": [\"33460967\", \"36192581\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Raptor interaction rests on a single Co-IP without reciprocal validation\", \"Mechanism of p53 suppression by RBM3 unresolved\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Identified the temperature-sensitive poison exon and HNRNPH1 as the core thermosensor governing cold-induced RBM3 expression, and validated ASO exclusion as a normothermic neuroprotective strategy.\",\n      \"evidence\": \"Genome-wide CRISPR screen in iPSC neurons, HNRNPH1 KO/KD, structural G-rich motif analysis, poison-exon deletion, and ASO in prion mice\",\n      \"pmids\": [\"37248947\", \"36946385\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How HNRNPH1 itself senses temperature not fully resolved\", \"Interplay between poison-exon control and IRES/transcriptional inputs not integrated\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Showed RBM3 can act as a tumor suppressor via m6A-dependent destabilization of CTNNB1, opposing Wnt-driven stemness in prostate cancer.\",\n      \"evidence\": \"Osteoblast co-culture, m6A assays on CTNNB1 with METTL3 dependence, mRNA stability, and stemness markers\",\n      \"pmids\": [\"36750551\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"How RBM3 couples to METTL3-mediated m6A deposition unclear\", \"Reconciliation with pro-Wnt CRC findings not addressed\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Established RBM3 as a genome-wide alternative-splicing regulator whose RRM domain alone directs splice-site selection, mechanistically grounding earlier splicing observations.\",\n      \"evidence\": \"RNA-seq of Rbm3-deficient cells with cDNA rescue and MS2 tethering between competing 5' splice sites with RRM truncation\",\n      \"pmids\": [\"39387568\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Sequence determinants of splice-site target selection not defined\", \"Relationship between splicing role and mRNA-stabilization role not unified\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Broadened RBM3's stabilized-target repertoire (SOX11, MEF2C, GAS6) and metabolic functions, linking it to neuronal differentiation, BBB integrity, antioxidant signaling, and myoblast mitochondrial metabolism.\",\n      \"evidence\": \"RIP and mRNA stability assays, scRNA-seq, in vivo injury models, and proteomic/metabolic profiling in NSCs, endothelial cells, and myoblasts\",\n      \"pmids\": [\"38523796\", \"38670534\", \"38555015\", \"38688991\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"GAS6 regulation rests on a single RIP assay\", \"Whether metabolic effects are direct mRNA-mediated or downstream not separated\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How RBM3's distinct biochemical activities\\u2014ribosome association, target-mRNA stabilization, splice-site selection, and pre-miRNA processing\\u2014are coordinated and directed to specific transcripts via a single RRM remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unified model linking RRM-based RNA recognition to target selectivity across functions\", \"Context-dependent tumor-suppressive versus oncogenic roles unreconciled\", \"Direct genome-wide binding map (e.g. CLIP) not present in the corpus\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0003723\", \"supporting_discovery_ids\": [6, 12, 17, 18, 19, 22, 28, 29, 32]},\n      {\"term_id\": \"GO:0045182\", \"supporting_discovery_ids\": [0, 2, 4, 20]},\n      {\"term_id\": \"GO:0140098\", \"supporting_discovery_ids\": [6, 28]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [1, 2, 6]},\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [3, 14]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-8953854\", \"supporting_discovery_ids\": [6, 28]},\n      {\"term_id\": \"R-HSA-392499\", \"supporting_discovery_ids\": [0, 2]},\n      {\"term_id\": \"R-HSA-8953897\", \"supporting_discovery_ids\": [3, 11, 25]},\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [14, 35]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"NF90\", \"IMP2\", \"PI3K p85\", \"Raptor\", \"HNRNPH1\", \"METTL3\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":6,"faith_total":6,"faith_pct":100.0}}