{"gene":"CIAPIN1","run_date":"2026-06-09T22:57:18","timeline":{"discoveries":[{"year":2006,"finding":"CIAPIN1 overexpression in gastric cancer cells upregulates MDR-1 (P-glycoprotein) and MRP-1 expression, reduces intracellular adriamycin accumulation, and protects cells from ADR-induced apoptosis; knockdown sensitizes cells to anticancer drugs. CIAPIN1 also decreased expression of Bcl-2, Bax, and p53.","method":"cDNA transfection and RNA interference (stable transfectants), in vitro drug sensitivity assay, Western blotting, flow cytometry","journal":"Cancer biology & therapy","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal gain- and loss-of-function in same cell lines, multiple readouts, single lab","pmids":["16410721"],"is_preprint":false},{"year":2006,"finding":"CIAPIN1 protein localizes to both the cytoplasm and nucleus, with accumulation in the nucleolus, in human and mouse cells. Bioinformatic prediction identified a putative nuclear localization signal and nuclear export signal, suggesting cytoplasm-nucleus-nucleolus translocation.","method":"Immunohistochemistry, immunofluorescence, His-tagged CIAPIN1 expression, subcellular fractionation + Western blotting","journal":"The journal of histochemistry and cytochemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — three orthogonal localization methods (IHC, fluorescence, fractionation) in one study, single lab","pmids":["16957168"],"is_preprint":false},{"year":2007,"finding":"CIAPIN1 upregulates MDR-1 and Bcl-2 transcription and downregulates Bax in leukemia cells, conferring multidrug resistance; this was independent of glutathione-S-transferase activity and intracellular glutathione content.","method":"Eukaryotic expression vector transfection, RNAi, semiquantitative RT-PCR, Western blot, luciferase reporter assay, flow cytometry","journal":"Biochemistry and cell biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — luciferase reporter for transcriptional regulation plus protein-level confirmation, single lab","pmids":["18059532"],"is_preprint":false},{"year":2007,"finding":"CIAPIN1 induces G1/S cell cycle arrest in gastric cancer cells, with downregulation of CyclinD1 and upregulation of p27Kip1 as contributing molecular mechanisms; ectopic CIAPIN1 suppresses proliferation while knockdown accelerates it.","method":"Adenovirus-mediated cDNA expression and siRNA knockdown, cell cycle analysis by flow cytometry, Western blotting, soft agar colony assay, in vivo xenograft","journal":"Cancer biology & therapy","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal gain/loss-of-function with mechanistic protein readouts, single lab","pmids":["18293492"],"is_preprint":false},{"year":2007,"finding":"Recombinant human CIAPIN1 expressed in baculovirus-insect cell system does NOT exhibit DNA methyltransferase, RNA methyltransferase, or DNA demethylase activity, and does not bind S-adenosyl-methionine in vitro, despite bioinformatic prediction of a methyltransferase motif.","method":"Baculovirus expression and Ni-NTA purification, in vitro DNA/RNA methyltransferase assay, demethylation assay, 3H-AdoMet binding test","journal":"International journal of biological macromolecules","confidence":"Medium","confidence_rationale":"Tier 1 / Moderate — in vitro biochemical assays with purified recombinant protein, multiple assays, single lab; negative result","pmids":["17935775"],"is_preprint":false},{"year":2008,"finding":"CIAPIN1 knockdown inhibits HCC cell proliferation by blocking S-phase entry and reduces anchorage-independent colony formation; adenovirus-delivered CIAPIN1 siRNA suppresses tumor growth in vivo.","method":"Adenovirus-mediated RNAi, cell proliferation assay, cell cycle analysis, soft agar colony formation, in vivo xenograft","journal":"Carcinogenesis","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — loss-of-function with defined cell cycle phenotype in vitro and in vivo, single lab","pmids":["18299278"],"is_preprint":false},{"year":2008,"finding":"Adenoviral restoration of CIAPIN1 in clear cell renal cell carcinoma cells causes G1 arrest and inhibits growth in vitro and in vivo, accompanied by decreased cyclinD1, cyclinE, CDK2, CDK4, p-Rb, and VEGF, and increased p27Kip1 and Rb.","method":"Adenoviral CIAPIN1 delivery, cell cycle analysis, Western blotting, in vivo xenograft","journal":"Cancer letters","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — gain-of-function with multiple protein-level mechanistic readouts, single lab","pmids":["19081179"],"is_preprint":false},{"year":2009,"finding":"CIAPIN1 siRNA in SGC7901 gastric cancer cells suppresses in vitro proliferation, migration, and tube formation of co-cultured endothelial cells (conditioned medium), and inhibits in vivo tumorigenicity and angiogenesis.","method":"Stable siRNA transfection, HUVEC proliferation/migration/tube formation assay with conditioned medium, in vivo xenograft angiogenesis","journal":"Cancer biology & therapy","confidence":"Low","confidence_rationale":"Tier 3 / Weak — indirect angiogenesis assay via conditioned medium, single lab, single study","pmids":["19502810"],"is_preprint":false},{"year":2011,"finding":"CIAPIN1 confers multidrug resistance in colon carcinoma cells by upregulating MDR-1 (P-gp) and Bcl-xL, and this function is independent of the wild-type p53 signaling pathway.","method":"siRNA knockdown and gene transfection, drug sensitivity assay, Western blotting, p53 inactivation analysis","journal":"Oncology reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal gain/loss-of-function with p53-pathway dissection, single lab","pmids":["21240465"],"is_preprint":false},{"year":2013,"finding":"Drosophila CIAPIN1 (D-CIAPIN1) is required for follicle cell proliferation and survival during ovarian development; mutation of the conserved twin-cysteine CX2C motif abolishes protein function; D-CIAPIN1 complements yeast CIAPIN1-deletion strain nonviability.","method":"Genetic allele analysis, yeast complementation, mitotic index quantification, cell death assay in Drosophila mutants","journal":"Developmental dynamics","confidence":"High","confidence_rationale":"Tier 1 / Strong — yeast complementation establishes functional conservation; site-specific CX2C motif mutation establishes critical domain; genetic loss-of-function with defined proliferation and survival phenotype","pmids":["23444317"],"is_preprint":false},{"year":2013,"finding":"CIAPIN1 siRNA inhibits proliferation and migration of vascular smooth muscle cells (VSMCs) and promotes apoptosis, accompanied by downregulation of Bcl-2 and upregulation of Bax.","method":"Adenovirus-encoded CIAPIN1 siRNA transduction into VSMCs, proliferation/migration/apoptosis assays, Western blotting","journal":"Current neurovascular research","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single loss-of-function approach, single lab","pmids":["23151078"],"is_preprint":false},{"year":2014,"finding":"CIAPIN1 depletion in K562 CML cells induces granulocytic differentiation via decreased NHE1 (Na+/H+ exchanger 1) expression and upregulated ERK1/2 phosphorylation; NHE1 inhibition further promotes differentiation, while NHE1 overexpression reverses it; ERK1/2 inhibitor (PD98059) abolishes this differentiation.","method":"shRNA knockdown, ectopic NHE1 expression, chemical inhibitors (NHE1 inhibitor, PD98059), differentiation markers, Western blotting","journal":"Leukemia research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — epistasis via rescue experiment (NHE1 overexpression reverses CIAPIN1-KD phenotype) and ERK1/2 inhibitor validation, single lab","pmids":["25043809"],"is_preprint":false},{"year":2015,"finding":"CIAPIN1 knockdown in K562 CML cells decreases ERK5 phosphorylation and NF-κB activity; combined inhibition of ERK5 (XMD8-92) and NF-κB (Bay 11-7082) with CIAPIN1 depletion synergistically inhibits proliferation and promotes apoptosis, enhancing imatinib sensitivity.","method":"shRNA knockdown, chemical inhibitors (XMD8-92, Bay 11-7082), proliferation/apoptosis assays, Western blotting, nude mice transplantation model","journal":"Biochemical pharmacology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — pathway epistasis via pharmacological inhibitors combined with genetic KD, in vivo validation, single lab","pmids":["26679828"],"is_preprint":false},{"year":2015,"finding":"CIAPIN1 overexpression in MDA-MB-231 breast cancer cells inhibits migration, invasion, and MMP expression by decreasing NHE1 expression and ERK1/2 phosphorylation; NHE1 inhibitor (Cariporide) and MEK1 inhibitor (PD98059) synergistically suppress these effects.","method":"Lentiviral overexpression, migration/invasion assays, MMP expression analysis, Western blotting, chemical inhibitors","journal":"Experimental cell research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — pathway dissection using orthogonal pharmacological inhibitors with genetic overexpression, single lab","pmids":["25724898"],"is_preprint":false},{"year":2018,"finding":"miR-182-5p directly binds the 3'UTR of CIAPIN1 mRNA (confirmed by dual-luciferase reporter assay) and negatively regulates CIAPIN1 expression; CIAPIN1 knockdown abolishes the protective effect of miR-182-5p inhibition on hypoxia-induced cardiomyocyte apoptosis.","method":"Dual-luciferase reporter assay, RT-qPCR, Western blotting, siRNA knockdown, annexin V/PI apoptosis assay, caspase-3 activity assay","journal":"Biochemistry and cell biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — luciferase reporter validates direct 3'UTR targeting, rescue experiment with CIAPIN1 siRNA, single lab","pmids":["29671338"],"is_preprint":false},{"year":2019,"finding":"Tat-CIAPIN1 fusion protein transduces into HT-22 hippocampal neurons and brain tissue, inhibiting H2O2-induced cell death and ischemic neuronal death by regulating Akt, MAPK (ERK, JNK, p38), NF-κB, and apoptotic (Bcl-2/Bax/caspase) signaling pathways.","method":"Tat fusion protein transduction, cell viability assay, ROS measurement, DNA fragmentation, Western blotting, ischemia animal model","journal":"Free radical biology & medicine","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — cell-permeable protein delivery with in vitro and in vivo validation, multiple pathway readouts, single lab","pmids":["30818058"],"is_preprint":false},{"year":2019,"finding":"Tat-CIAPIN1 transduction into LPS-exposed macrophages reduces ROS, DNA fragmentation, MAPKs and NF-κB activation, and suppresses pro-inflammatory mediators (COX-2, iNOS, IL-6, TNF-α) and Bax/caspase-3; in a TPA-induced mouse skin inflammation model, transduced Tat-CIAPIN1 decreases inflammatory damage.","method":"Tat fusion protein cell transduction, ROS assay, DNA fragmentation, MAPK/NF-κB Western blotting, cytokine measurement, TPA mouse model","journal":"BMB reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vitro and in vivo validation with multiple signaling pathway readouts, single lab","pmids":["31722779"],"is_preprint":false},{"year":2019,"finding":"miR-16 directly targets the 3'UTR of CIAPIN1 and negatively modulates CIAPIN1 expression; CIAPIN1 overexpression reverses hypoxia/reoxygenation-induced changes in apoptosis-associated proteins and modulates NF-κB/IκBα phosphorylation.","method":"Dual-luciferase reporter assay, RT-qPCR, Western blotting, miR-16 mimics/inhibitor, CIAPIN1 overexpression, flow cytometry","journal":"Molecular medicine reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — luciferase reporter confirms direct 3'UTR binding, rescue with CIAPIN1 overexpression, single lab","pmids":["31432171"],"is_preprint":false},{"year":2021,"finding":"CIAPIN1 negatively regulates Tp53 transcription, promoting VSMC cell cycle progression and migration via cyclin E1–CDK2/pRb/PCNA and MMP2 pathways; CIAPIN1 also increases JAK2 expression and enhances JAK2/STAT3 phosphorylation upon vascular injury, driving phenotypic switching from contractile to synthetic state.","method":"Lentiviral gain- and loss-of-function, balloon injury and ligation neointima models in rat/mouse carotid arteries, Western blotting, cell cycle/proliferation/migration assays","journal":"British journal of pharmacology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal in vitro and in vivo gain/loss-of-function with mechanistic pathway delineation, single lab","pmids":["34289085"],"is_preprint":false},{"year":2021,"finding":"Tat-CIAPIN1 protein transduction protects pancreatic RINm5F β-cells from cytokine-induced cytotoxicity by reducing ROS/DNA fragmentation, inhibiting MAPK and NF-κB activation, elevating Bcl-2, and reducing Bax and cleaved Caspase-3.","method":"Tat fusion protein transduction, cell viability assay, ROS assay, Western blotting (MAPK, NF-κB, Bcl-2/Bax/caspase-3)","journal":"BMB reports","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single study with single-method protein delivery, no complementary genetic approach, single lab","pmids":["34120676"],"is_preprint":false},{"year":2022,"finding":"CIAPIN1 silencing in cholangiocarcinoma KKU-100 cells suppresses migration and invasion; bioinformatic analysis of CIAPIN1-interacting proteins identified via LC-MS/MS after siRNA knockdown predicts connection to TGF-β/SMADs pathway via NOS1.","method":"siRNA knockdown, LC-MS/MS proteomics, transwell migration/invasion assay, bioinformatics pathway prediction","journal":"Journal of clinical medicine","confidence":"Low","confidence_rationale":"Tier 3 / Weak — direct functional assay for migration/invasion, but pathway connection to TGF-β/SMADs is bioinformatic prediction not experimentally validated; single lab","pmids":["35807116"],"is_preprint":false},{"year":2023,"finding":"Tat-CIAPIN1 protein protects pancreatic β-cells from hIAPP-induced toxicity by reducing MAPK activation and regulating COX-2, iNOS, Bcl-2, Bax, and Caspase-3; in an HFD/STZ T2DM mouse model, Tat-CIAPIN1 ameliorated pathological changes in pancreatic β-cells and reduced fasting blood glucose.","method":"Tat fusion protein transduction, cell viability, Western blotting, T2DM mouse model (HFD+STZ), blood glucose measurement","journal":"International journal of molecular sciences","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single method of protein delivery, in vivo model without genetic controls, single lab","pmids":["37445656"],"is_preprint":false},{"year":2024,"finding":"CIAPIN1 downregulation in breast cancer cells suppresses proliferation, migration, and glycolysis (pyruvate, lactate, ATP production) and reduces PKM2 expression and STAT3 phosphorylation, placing CIAPIN1 upstream of the STAT3/PKM2 pathway.","method":"siRNA knockdown, RT-qPCR, Western blotting, proliferation/migration assays, metabolite measurement","journal":"Scientific reports","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single-method knockdown without rescue or complementary overexpression for pathway validation, single lab","pmids":["39242716"],"is_preprint":false},{"year":2025,"finding":"CIAPIN1 overexpression in LPS-induced podocytes activates the PI3K/AKT pathway (elevated p-PI3K and p-Akt), increases ferroptosis-protective proteins SLC7A11 and GPX4, and attenuates ferroptosis markers (MDA, Fe2+); PI3K inhibitor LY294002 reverses these effects, confirming pathway dependency.","method":"CIAPIN1 overexpression vector, PI3K inhibitor (LY294002), Western blotting, MDA/Fe2+ measurement, RT-qPCR","journal":"BMC nephrology","confidence":"Low","confidence_rationale":"Tier 3 / Weak — pharmacological inhibitor confirms pathway, but no genetic rescue and single lab","pmids":["40259237"],"is_preprint":false},{"year":2025,"finding":"CIAPIN1 promotes proliferation and migration of PDGF-BB-activated airway smooth muscle cells; knockdown inhibits p-PI3K, p-Akt, p-JAK2, and p-STAT3, placing CIAPIN1 upstream of both PI3K/AKT and JAK2/STAT3 signaling in this context.","method":"siRNA knockdown, Western blotting, proliferation/migration/apoptosis assays","journal":"Physiological reports","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single-method loss-of-function, no rescue or inhibitor epistasis, single lab","pmids":["40338178"],"is_preprint":false},{"year":2025,"finding":"A STAT3 inhibitor (CAB) suppresses VSMC CIAPIN1 transcription via STAT3/SH2 domain binding; CIAPIN1 overexpression reverses CAB-mediated suppression of VSMC proliferation, migration, and intimal hyperplasia, establishing CIAPIN1 as a transcriptional target of STAT3 in the CIAPIN1/JAK2/STAT3 axis.","method":"Compound binding to STAT3 SH2 domain, CIAPIN1 overexpression rescue, neointima animal models, Western blotting","journal":"Acta pharmaceutica Sinica. B","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — rescue experiment with CIAPIN1 overexpression validates pathway position, in vivo neointima model, single lab","pmids":["40370537"],"is_preprint":false},{"year":2026,"finding":"CIAPIN1 directly binds consensus sites in the Tp53 promoter (confirmed by ChIP and dual-luciferase reporter assay) and represses Tp53 transcription in VSMCs. PDGF-BB-induced ROS production promotes nuclear translocation of CIAPIN1 via a C-terminal NLS (residues 236–239) through the importin-α/β pathway; deletion of the NLS (Δ236–239) or blocking nuclear import with NAC or ivermectin restores p53 expression and reduces neointimal formation in vivo.","method":"ChIP assay, dual-luciferase reporter assay, site-directed mutagenesis of NLS, ROS scavenger (NAC), importin inhibitor (ivermectin), subcellular fractionation, rat carotid balloon injury model","journal":"Theranostics","confidence":"High","confidence_rationale":"Tier 1 / Strong — ChIP + luciferase reporter directly demonstrate promoter binding; NLS mutagenesis + importin inhibitor orthogonally validate nuclear trafficking mechanism; in vivo rescue confirms functional relevance","pmids":["42094595"],"is_preprint":false},{"year":2026,"finding":"CIAPIN1 interacts functionally with OPA1 (optic atrophy 1): CIAPIN1 overexpression maintains mitochondrial membrane potential and restores mitochondrial function-related proteins in LPS-stimulated renal tubular cells, while OPA1 overexpression rescues the detrimental effects of CIAPIN1 knockdown on apoptosis and mitochondrial dysfunction, defining a CIAPIN1–OPA1 signaling axis. WTAP promotes m6A modification of CIAPIN1 mRNA, reducing its expression under LPS.","method":"Gain- and loss-of-function (overexpression and siRNA), mitochondrial membrane potential assay, Western blotting, cecal ligation and puncture AKI mouse model, m6A modification analysis","journal":"Pathology, research and practice","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — epistasis rescue (OPA1 OE reverses CIAPIN1-KD phenotype) establishes functional axis; m6A writer identified; in vivo validation; single lab","pmids":["41713137"],"is_preprint":false}],"current_model":"CIAPIN1 is a redox-sensitive anti-apoptotic protein that localizes to the cytoplasm and nucleus (with nucleolar accumulation), undergoes ROS-driven nuclear translocation via a C-terminal NLS through the importin-α/β pathway, directly represses Tp53 promoter transcription (established by ChIP and luciferase assay), and acts downstream of receptor tyrosine kinase–Ras signaling to regulate cell cycle progression (via CyclinD1/p27/CDK2), multidrug resistance (by transcriptionally upregulating MDR-1, Bcl-2, and suppressing Bax), vascular smooth muscle cell phenotypic switching (through JAK2/STAT3 and p53/cyclin E1–CDK2 axes), NHE1–ERK1/2-dependent migration and differentiation, PI3K/AKT-dependent ferroptosis suppression, and mitochondrial integrity via a CIAPIN1–OPA1 axis; its conserved CX2C motif is essential for function."},"narrative":{"mechanistic_narrative":"CIAPIN1 is a redox-responsive anti-apoptotic and pro-proliferative factor that integrates stress and growth signals to control cell survival, cell cycle progression, and migration across diverse cell types [PMID:18293492, PMID:23444317, PMID:34289085]. Its most directly resolved mechanism is transcriptional repression of the Tp53 tumor suppressor: CIAPIN1 binds consensus sites in the Tp53 promoter and represses its transcription, and PDGF-BB-induced ROS drives its nuclear translocation through a C-terminal NLS (residues 236-239) via the importin-α/β pathway, so that NLS deletion or blockade of nuclear import restores p53 and limits neointimal formation in vivo [PMID:42094595]. Consistent with a survival/proliferation role, CIAPIN1 enforces G1/S progression through cyclin D1, cyclin E, CDK2/CDK4, p27Kip1, and Rb [PMID:18293492, PMID:19081179], and confers multidrug resistance by upregulating MDR-1, Bcl-2/Bcl-xL and suppressing Bax, in a manner independent of glutathione status and of wild-type p53 [PMID:16410721, PMID:18059532, PMID:21240465]. It acts upstream of NHE1-ERK1/2 signaling to govern leukemic differentiation and tumor cell migration [PMID:25043809, PMID:25724898] and upstream of JAK2/STAT3 to drive vascular smooth muscle phenotypic switching, with CIAPIN1 itself a transcriptional target of STAT3 in a feed-forward CIAPIN1/JAK2/STAT3 axis [PMID:34289085, PMID:40370537]. CIAPIN1 also suppresses ferroptosis via PI3K/AKT-dependent induction of SLC7A11 and GPX4 [PMID:40259237] and preserves mitochondrial integrity through a CIAPIN1-OPA1 axis [PMID:41713137]. Functional conservation is established by yeast complementation, and its twin-cysteine CX2C motif is essential for activity [PMID:23444317]; recombinant CIAPIN1 lacks methyltransferase and AdoMet-binding activity despite a predicted motif [PMID:17935775].","teleology":[{"year":2006,"claim":"Established that CIAPIN1 functions as a determinant of chemoresistance and apoptosis, defining its core cytoprotective role.","evidence":"Reciprocal cDNA overexpression and RNAi in gastric cancer cells with drug sensitivity assays and Western blotting","pmids":["16410721"],"confidence":"Medium","gaps":["Mechanism of MDR-1/MRP-1 upregulation not defined","Direct molecular targets unidentified"]},{"year":2006,"claim":"Resolved where CIAPIN1 resides, showing dual cytoplasmic/nuclear localization with nucleolar accumulation and predicting regulated nuclear trafficking.","evidence":"IHC, immunofluorescence, and subcellular fractionation in human and mouse cells","pmids":["16957168"],"confidence":"Medium","gaps":["NLS/NES predictions were bioinformatic only at this stage","Trigger for translocation unknown"]},{"year":2007,"claim":"Linked CIAPIN1 to multidrug resistance at the transcriptional level and tied it to cell cycle arrest, distinguishing its action from glutathione-based detoxification.","evidence":"Luciferase reporter and RT-PCR in leukemia cells, plus reciprocal gain/loss with cell cycle analysis in gastric cancer cells","pmids":["18059532","18293492"],"confidence":"Medium","gaps":["Whether CIAPIN1 binds MDR-1/Bcl-2 promoters directly not tested","Connection between cell cycle and drug resistance roles unclear"]},{"year":2007,"claim":"Tested and excluded a predicted enzymatic identity, showing CIAPIN1 is not a methyltransferase and does not bind AdoMet.","evidence":"In vitro methyltransferase/demethylase and 3H-AdoMet binding assays with purified recombinant protein","pmids":["17935775"],"confidence":"Medium","gaps":["Negative result does not assign an alternative biochemical activity","Native cofactor, if any, unknown"]},{"year":2008,"claim":"Generalized the proliferation/cell cycle role across tumor types, defining the cyclin/CDK/p27/Rb effectors that CIAPIN1 controls.","evidence":"Adenoviral RNAi/restoration in HCC and renal carcinoma with xenografts and Western blotting","pmids":["18299278","19081179"],"confidence":"Medium","gaps":["Upstream regulator driving cyclin changes not identified","Direct versus indirect control of these proteins unresolved"]},{"year":2013,"claim":"Established functional conservation and identified the CX2C motif as essential, anchoring CIAPIN1 function to a defined structural element.","evidence":"Drosophila genetic alleles, yeast complementation, and CX2C mutation with proliferation/survival readouts","pmids":["23444317"],"confidence":"High","gaps":["Biochemical function of the CX2C motif not defined","Whether the motif mediates metal/redox chemistry untested"]},{"year":2014,"claim":"Placed CIAPIN1 upstream of NHE1-ERK1/2 signaling controlling differentiation and migration, establishing an effector pathway via epistasis.","evidence":"shRNA knockdown with NHE1 rescue and ERK inhibitor in K562 cells; overexpression with NHE1/MEK inhibitors in breast cancer cells","pmids":["25043809","25724898"],"confidence":"Medium","gaps":["How CIAPIN1 regulates NHE1 expression unknown","Direct physical link to the pathway not shown"]},{"year":2018,"claim":"Identified upstream miRNA regulation of CIAPIN1, embedding it in stress-survival circuits in cardiomyocytes.","evidence":"Dual-luciferase 3'UTR reporters and rescue knockdown for miR-182-5p and miR-16 with apoptosis assays","pmids":["29671338","31432171"],"confidence":"Medium","gaps":["Physiological relevance of these miRNA-CIAPIN1 axes in vivo limited","Downstream apoptotic mechanism inferred from protein levels"]},{"year":2019,"claim":"Demonstrated that delivered CIAPIN1 protein is cytoprotective and anti-inflammatory under oxidative/inflammatory stress, implicating MAPK/NF-κB/Akt signaling.","evidence":"Tat-CIAPIN1 fusion protein transduction in neurons and macrophages with ischemia and TPA skin models","pmids":["30818058","31722779"],"confidence":"Medium","gaps":["Whether endogenous CIAPIN1 acts through the same pathways untested","Direct molecular targets of CIAPIN1 in these pathways unknown"]},{"year":2021,"claim":"Connected CIAPIN1 to vascular remodeling by showing it represses Tp53 and activates JAK2/STAT3 to drive smooth muscle phenotypic switching.","evidence":"Lentiviral gain/loss-of-function with balloon injury/ligation neointima models and Western blotting","pmids":["34289085"],"confidence":"Medium","gaps":["Mechanism of Tp53 repression not yet defined here","Whether JAK2/STAT3 activation is direct unresolved"]},{"year":2025,"claim":"Closed a regulatory loop by establishing CIAPIN1 as a transcriptional target of STAT3, defining a feed-forward CIAPIN1/JAK2/STAT3 axis in vascular cells.","evidence":"STAT3 SH2-domain compound binding with CIAPIN1 overexpression rescue in neointima models","pmids":["40370537"],"confidence":"Medium","gaps":["Direct STAT3 binding to the CIAPIN1 promoter not shown","Quantitative contribution of the loop in vivo unclear"]},{"year":2025,"claim":"Extended CIAPIN1 to ferroptosis control, showing PI3K/AKT-dependent induction of SLC7A11 and GPX4.","evidence":"Overexpression with PI3K inhibitor LY294002 and ferroptosis-marker measurement in podocytes","pmids":["40259237"],"confidence":"Low","gaps":["No genetic rescue of the PI3K/AKT dependency","Direct link between CIAPIN1 and PI3K activation unestablished"]},{"year":2026,"claim":"Provided the definitive mechanism for CIAPIN1's transcriptional action, demonstrating direct Tp53 promoter binding and ROS-triggered importin-dependent nuclear import.","evidence":"ChIP and luciferase reporters, NLS site-directed mutagenesis, NAC/ivermectin blockade, and carotid balloon injury model","pmids":["42094595"],"confidence":"High","gaps":["Whether CIAPIN1 acts alone or with cofactors at the Tp53 promoter unknown","Structural basis of DNA binding not resolved"]},{"year":2026,"claim":"Defined a mitochondrial protective function via a CIAPIN1-OPA1 axis and identified WTAP-mediated m6A modification as an upstream regulator.","evidence":"Gain/loss-of-function with OPA1 rescue, membrane potential assays, m6A analysis, and a sepsis AKI model","pmids":["41713137"],"confidence":"Medium","gaps":["Direct physical interaction of CIAPIN1 with OPA1 not demonstrated","Mechanism by which CIAPIN1 stabilizes OPA1 unknown"]},{"year":null,"claim":"The intrinsic biochemical activity of CIAPIN1 and the function of its essential CX2C motif remain undefined, leaving open how a single protein executes transcriptional repression, redox sensing, and mitochondrial protection.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No assigned catalytic or cofactor-binding activity","No structural model of DNA binding or partner engagement","Mechanistic unity across its many reported pathways untested"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[26,2,18]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[26]}],"localization":[{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[1,26]},{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[1,26]},{"term_id":"GO:0005730","term_label":"nucleolus","supporting_discovery_ids":[1]}],"pathway":[{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[3,6,18]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[18,25,24]},{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[0,14,23]},{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[26]}],"complexes":[],"partners":["TP53","OPA1"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q6FI81","full_name":"Anamorsin","aliases":["Cytokine-induced apoptosis inhibitor 1","Fe-S cluster assembly protein DRE2 homolog"],"length_aa":312,"mass_kda":33.6,"function":"Component of the cytosolic iron-sulfur (Fe-S) protein assembly (CIA) machinery required for the maturation of extramitochondrial Fe-S proteins. Part of an electron transfer chain functioning in an early step of cytosolic Fe-S biogenesis, facilitating the de novo assembly of a [4Fe-4S] cluster on the scaffold complex NUBP1-NUBP2. Electrons are transferred to CIAPIN1 from NADPH via the FAD- and FMN-containing protein NDOR1 (PubMed:23596212). NDOR1-CIAPIN1 are also required for the assembly of the diferric tyrosyl radical cofactor of ribonucleotide reductase (RNR), probably by providing electrons for reduction during radical cofactor maturation in the catalytic small subunit (By similarity). Has anti-apoptotic effects in the cell. Involved in negative control of cell death upon cytokine withdrawal. Promotes development of hematopoietic cells (By similarity)","subcellular_location":"Cytoplasm; Nucleus; Mitochondrion intermembrane space","url":"https://www.uniprot.org/uniprotkb/Q6FI81/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":true,"resolved_as":"","url":"https://depmap.org/portal/gene/CIAPIN1","classification":"Common Essential","n_dependent_lines":1200,"n_total_lines":1208,"dependency_fraction":0.9933774834437086},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[{"gene":"IPO13","stoichiometry":10.0},{"gene":"SLC7A6","stoichiometry":10.0}],"url":"https://opencell.sf.czbiohub.org/search/CIAPIN1","total_profiled":1310},"omim":[{"mim_id":"608943","title":"CYTOKINE-INDUCED APOPTOSIS INHIBITOR 1; CIAPIN1","url":"https://www.omim.org/entry/608943"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Mitochondria","reliability":"Supported"},{"location":"Nucleoplasm","reliability":"Additional"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in 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biologiia","url":"https://pubmed.ncbi.nlm.nih.gov/18389626","citation_count":9,"is_preprint":false},{"pmid":"34120676","id":"PMC_34120676","title":"Tat-CIAPIN1 protein prevents against cytokine-induced cytotoxicity in pancreatic RINm5F β-cells.","date":"2021","source":"BMB reports","url":"https://pubmed.ncbi.nlm.nih.gov/34120676","citation_count":6,"is_preprint":false},{"pmid":"24676475","id":"PMC_24676475","title":"CIAPIN1 gene silencing enhances chemosensitivity in a drug-resistant animal model in vivo.","date":"2014","source":"Brazilian journal of medical and biological research = Revista brasileira de pesquisas medicas e biologicas","url":"https://pubmed.ncbi.nlm.nih.gov/24676475","citation_count":6,"is_preprint":false},{"pmid":"40259237","id":"PMC_40259237","title":"CIAPIN1 attenuates ferroptosis via regulating PI3K/AKT pathway in LPS-induced podocytes.","date":"2025","source":"BMC nephrology","url":"https://pubmed.ncbi.nlm.nih.gov/40259237","citation_count":5,"is_preprint":false},{"pmid":"18466694","id":"PMC_18466694","title":"[CIAPIN1 expression in human lung cancer tissues and inhibitory effects of the gene on human pulmonary carcinoma NCI-H446 cells].","date":"2008","source":"Xi bao yu fen zi mian yi xue za zhi = Chinese journal of cellular and molecular immunology","url":"https://pubmed.ncbi.nlm.nih.gov/18466694","citation_count":5,"is_preprint":false},{"pmid":"35807116","id":"PMC_35807116","title":"Prediction of CIAPIN1 (Cytokine-Induced Apoptosis Inhibitor 1) Signaling Pathway and Its Role in Cholangiocarcinoma Metastasis.","date":"2022","source":"Journal of clinical medicine","url":"https://pubmed.ncbi.nlm.nih.gov/35807116","citation_count":4,"is_preprint":false},{"pmid":"33538533","id":"PMC_33538533","title":"Inhibition of miR-322-5p Protects Cardiac Myoblast Cells Against Hypoxia-Induced Apoptosis and Injury Through Regulating CIAPIN1.","date":"2021","source":"Journal of cardiovascular pharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/33538533","citation_count":4,"is_preprint":false},{"pmid":"39241831","id":"PMC_39241831","title":"Serum CIAPIN1 is lower in septic patients with cardiac dysfunction.","date":"2024","source":"Peptides","url":"https://pubmed.ncbi.nlm.nih.gov/39241831","citation_count":2,"is_preprint":false},{"pmid":"40370537","id":"PMC_40370537","title":"Novel carbazole attenuates vascular remodeling through STAT3/CIAPIN1 signaling in vascular smooth muscle cells.","date":"2025","source":"Acta pharmaceutica Sinica. B","url":"https://pubmed.ncbi.nlm.nih.gov/40370537","citation_count":2,"is_preprint":false},{"pmid":"23444317","id":"PMC_23444317","title":"Drosophila CIAPIN1 homologue is required for follicle cell proliferation and survival.","date":"2013","source":"Developmental dynamics : an official publication of the American Association of Anatomists","url":"https://pubmed.ncbi.nlm.nih.gov/23444317","citation_count":2,"is_preprint":false},{"pmid":"39242716","id":"PMC_39242716","title":"Downregulation of CIAPIN1 regulates the proliferation, migration and glycolysis of breast cancer cells via inhibition of STAT3 pathway.","date":"2024","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/39242716","citation_count":2,"is_preprint":false},{"pmid":"40338178","id":"PMC_40338178","title":"CIAPIN1 promotes proliferation and migration of PDGF-BB-activated airway smooth muscle cells via the PI3K/AKT and JAK2/STAT3 signaling pathways.","date":"2025","source":"Physiological reports","url":"https://pubmed.ncbi.nlm.nih.gov/40338178","citation_count":2,"is_preprint":false},{"pmid":"25043809","id":"PMC_25043809","title":"CIAPIN1 targets Na+/H+ exchanger 1 to mediate K562 chronic myeloid leukemia cells' differentiation via ERK1/2 signaling pathway.","date":"2014","source":"Leukemia research","url":"https://pubmed.ncbi.nlm.nih.gov/25043809","citation_count":2,"is_preprint":false},{"pmid":"40730854","id":"PMC_40730854","title":"CIAPIN1 promotes survival, proliferation, migration and glycolysis of endometrial cancer cells through PI3K/Akt pathway.","date":"2025","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/40730854","citation_count":0,"is_preprint":false},{"pmid":"41189039","id":"PMC_41189039","title":"CIAPIN1 as a Promoter of Oral Squamous Cell Carcinoma Progression.","date":"2025","source":"Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology","url":"https://pubmed.ncbi.nlm.nih.gov/41189039","citation_count":0,"is_preprint":false},{"pmid":"21729524","id":"PMC_21729524","title":"[Expression of CIAPIN1 gene in BMMNC of patients with leukemia].","date":"2011","source":"Zhongguo shi yan xue ye xue za zhi","url":"https://pubmed.ncbi.nlm.nih.gov/21729524","citation_count":0,"is_preprint":false},{"pmid":"42094595","id":"PMC_42094595","title":"CIAPIN1 functions as a redox-sensitive transcriptional repressor of Tp53 during vascular remodeling.","date":"2026","source":"Theranostics","url":"https://pubmed.ncbi.nlm.nih.gov/42094595","citation_count":0,"is_preprint":false},{"pmid":"41713137","id":"PMC_41713137","title":"CIAPIN1 improves sepsis-induced acute kidney injury by inhibiting mitochondrial damage.","date":"2026","source":"Pathology, research and practice","url":"https://pubmed.ncbi.nlm.nih.gov/41713137","citation_count":0,"is_preprint":false},{"pmid":"24989274","id":"PMC_24989274","title":"[Effect of CIAPIN1 gene on proliferation of K562 cells].","date":"2014","source":"Zhongguo shi yan xue ye xue za zhi","url":"https://pubmed.ncbi.nlm.nih.gov/24989274","citation_count":0,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":23571,"output_tokens":6842,"usd":0.086671,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":15963,"output_tokens":4351,"usd":0.094295,"stage2_stop_reason":"end_turn"},"total_usd":0.180966,"stage1_batch_id":"msgbatch_01ACAxJQabDsht39JXeWG22d","stage2_batch_id":"msgbatch_01QEU22A9U5sbPTgsMzTmvSf","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2006,\n      \"finding\": \"CIAPIN1 overexpression in gastric cancer cells upregulates MDR-1 (P-glycoprotein) and MRP-1 expression, reduces intracellular adriamycin accumulation, and protects cells from ADR-induced apoptosis; knockdown sensitizes cells to anticancer drugs. CIAPIN1 also decreased expression of Bcl-2, Bax, and p53.\",\n      \"method\": \"cDNA transfection and RNA interference (stable transfectants), in vitro drug sensitivity assay, Western blotting, flow cytometry\",\n      \"journal\": \"Cancer biology & therapy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal gain- and loss-of-function in same cell lines, multiple readouts, single lab\",\n      \"pmids\": [\"16410721\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"CIAPIN1 protein localizes to both the cytoplasm and nucleus, with accumulation in the nucleolus, in human and mouse cells. Bioinformatic prediction identified a putative nuclear localization signal and nuclear export signal, suggesting cytoplasm-nucleus-nucleolus translocation.\",\n      \"method\": \"Immunohistochemistry, immunofluorescence, His-tagged CIAPIN1 expression, subcellular fractionation + Western blotting\",\n      \"journal\": \"The journal of histochemistry and cytochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — three orthogonal localization methods (IHC, fluorescence, fractionation) in one study, single lab\",\n      \"pmids\": [\"16957168\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"CIAPIN1 upregulates MDR-1 and Bcl-2 transcription and downregulates Bax in leukemia cells, conferring multidrug resistance; this was independent of glutathione-S-transferase activity and intracellular glutathione content.\",\n      \"method\": \"Eukaryotic expression vector transfection, RNAi, semiquantitative RT-PCR, Western blot, luciferase reporter assay, flow cytometry\",\n      \"journal\": \"Biochemistry and cell biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — luciferase reporter for transcriptional regulation plus protein-level confirmation, single lab\",\n      \"pmids\": [\"18059532\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"CIAPIN1 induces G1/S cell cycle arrest in gastric cancer cells, with downregulation of CyclinD1 and upregulation of p27Kip1 as contributing molecular mechanisms; ectopic CIAPIN1 suppresses proliferation while knockdown accelerates it.\",\n      \"method\": \"Adenovirus-mediated cDNA expression and siRNA knockdown, cell cycle analysis by flow cytometry, Western blotting, soft agar colony assay, in vivo xenograft\",\n      \"journal\": \"Cancer biology & therapy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal gain/loss-of-function with mechanistic protein readouts, single lab\",\n      \"pmids\": [\"18293492\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Recombinant human CIAPIN1 expressed in baculovirus-insect cell system does NOT exhibit DNA methyltransferase, RNA methyltransferase, or DNA demethylase activity, and does not bind S-adenosyl-methionine in vitro, despite bioinformatic prediction of a methyltransferase motif.\",\n      \"method\": \"Baculovirus expression and Ni-NTA purification, in vitro DNA/RNA methyltransferase assay, demethylation assay, 3H-AdoMet binding test\",\n      \"journal\": \"International journal of biological macromolecules\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro biochemical assays with purified recombinant protein, multiple assays, single lab; negative result\",\n      \"pmids\": [\"17935775\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"CIAPIN1 knockdown inhibits HCC cell proliferation by blocking S-phase entry and reduces anchorage-independent colony formation; adenovirus-delivered CIAPIN1 siRNA suppresses tumor growth in vivo.\",\n      \"method\": \"Adenovirus-mediated RNAi, cell proliferation assay, cell cycle analysis, soft agar colony formation, in vivo xenograft\",\n      \"journal\": \"Carcinogenesis\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — loss-of-function with defined cell cycle phenotype in vitro and in vivo, single lab\",\n      \"pmids\": [\"18299278\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Adenoviral restoration of CIAPIN1 in clear cell renal cell carcinoma cells causes G1 arrest and inhibits growth in vitro and in vivo, accompanied by decreased cyclinD1, cyclinE, CDK2, CDK4, p-Rb, and VEGF, and increased p27Kip1 and Rb.\",\n      \"method\": \"Adenoviral CIAPIN1 delivery, cell cycle analysis, Western blotting, in vivo xenograft\",\n      \"journal\": \"Cancer letters\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — gain-of-function with multiple protein-level mechanistic readouts, single lab\",\n      \"pmids\": [\"19081179\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"CIAPIN1 siRNA in SGC7901 gastric cancer cells suppresses in vitro proliferation, migration, and tube formation of co-cultured endothelial cells (conditioned medium), and inhibits in vivo tumorigenicity and angiogenesis.\",\n      \"method\": \"Stable siRNA transfection, HUVEC proliferation/migration/tube formation assay with conditioned medium, in vivo xenograft angiogenesis\",\n      \"journal\": \"Cancer biology & therapy\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — indirect angiogenesis assay via conditioned medium, single lab, single study\",\n      \"pmids\": [\"19502810\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"CIAPIN1 confers multidrug resistance in colon carcinoma cells by upregulating MDR-1 (P-gp) and Bcl-xL, and this function is independent of the wild-type p53 signaling pathway.\",\n      \"method\": \"siRNA knockdown and gene transfection, drug sensitivity assay, Western blotting, p53 inactivation analysis\",\n      \"journal\": \"Oncology reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal gain/loss-of-function with p53-pathway dissection, single lab\",\n      \"pmids\": [\"21240465\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Drosophila CIAPIN1 (D-CIAPIN1) is required for follicle cell proliferation and survival during ovarian development; mutation of the conserved twin-cysteine CX2C motif abolishes protein function; D-CIAPIN1 complements yeast CIAPIN1-deletion strain nonviability.\",\n      \"method\": \"Genetic allele analysis, yeast complementation, mitotic index quantification, cell death assay in Drosophila mutants\",\n      \"journal\": \"Developmental dynamics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — yeast complementation establishes functional conservation; site-specific CX2C motif mutation establishes critical domain; genetic loss-of-function with defined proliferation and survival phenotype\",\n      \"pmids\": [\"23444317\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"CIAPIN1 siRNA inhibits proliferation and migration of vascular smooth muscle cells (VSMCs) and promotes apoptosis, accompanied by downregulation of Bcl-2 and upregulation of Bax.\",\n      \"method\": \"Adenovirus-encoded CIAPIN1 siRNA transduction into VSMCs, proliferation/migration/apoptosis assays, Western blotting\",\n      \"journal\": \"Current neurovascular research\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single loss-of-function approach, single lab\",\n      \"pmids\": [\"23151078\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"CIAPIN1 depletion in K562 CML cells induces granulocytic differentiation via decreased NHE1 (Na+/H+ exchanger 1) expression and upregulated ERK1/2 phosphorylation; NHE1 inhibition further promotes differentiation, while NHE1 overexpression reverses it; ERK1/2 inhibitor (PD98059) abolishes this differentiation.\",\n      \"method\": \"shRNA knockdown, ectopic NHE1 expression, chemical inhibitors (NHE1 inhibitor, PD98059), differentiation markers, Western blotting\",\n      \"journal\": \"Leukemia research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — epistasis via rescue experiment (NHE1 overexpression reverses CIAPIN1-KD phenotype) and ERK1/2 inhibitor validation, single lab\",\n      \"pmids\": [\"25043809\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"CIAPIN1 knockdown in K562 CML cells decreases ERK5 phosphorylation and NF-κB activity; combined inhibition of ERK5 (XMD8-92) and NF-κB (Bay 11-7082) with CIAPIN1 depletion synergistically inhibits proliferation and promotes apoptosis, enhancing imatinib sensitivity.\",\n      \"method\": \"shRNA knockdown, chemical inhibitors (XMD8-92, Bay 11-7082), proliferation/apoptosis assays, Western blotting, nude mice transplantation model\",\n      \"journal\": \"Biochemical pharmacology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — pathway epistasis via pharmacological inhibitors combined with genetic KD, in vivo validation, single lab\",\n      \"pmids\": [\"26679828\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"CIAPIN1 overexpression in MDA-MB-231 breast cancer cells inhibits migration, invasion, and MMP expression by decreasing NHE1 expression and ERK1/2 phosphorylation; NHE1 inhibitor (Cariporide) and MEK1 inhibitor (PD98059) synergistically suppress these effects.\",\n      \"method\": \"Lentiviral overexpression, migration/invasion assays, MMP expression analysis, Western blotting, chemical inhibitors\",\n      \"journal\": \"Experimental cell research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — pathway dissection using orthogonal pharmacological inhibitors with genetic overexpression, single lab\",\n      \"pmids\": [\"25724898\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"miR-182-5p directly binds the 3'UTR of CIAPIN1 mRNA (confirmed by dual-luciferase reporter assay) and negatively regulates CIAPIN1 expression; CIAPIN1 knockdown abolishes the protective effect of miR-182-5p inhibition on hypoxia-induced cardiomyocyte apoptosis.\",\n      \"method\": \"Dual-luciferase reporter assay, RT-qPCR, Western blotting, siRNA knockdown, annexin V/PI apoptosis assay, caspase-3 activity assay\",\n      \"journal\": \"Biochemistry and cell biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — luciferase reporter validates direct 3'UTR targeting, rescue experiment with CIAPIN1 siRNA, single lab\",\n      \"pmids\": [\"29671338\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Tat-CIAPIN1 fusion protein transduces into HT-22 hippocampal neurons and brain tissue, inhibiting H2O2-induced cell death and ischemic neuronal death by regulating Akt, MAPK (ERK, JNK, p38), NF-κB, and apoptotic (Bcl-2/Bax/caspase) signaling pathways.\",\n      \"method\": \"Tat fusion protein transduction, cell viability assay, ROS measurement, DNA fragmentation, Western blotting, ischemia animal model\",\n      \"journal\": \"Free radical biology & medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — cell-permeable protein delivery with in vitro and in vivo validation, multiple pathway readouts, single lab\",\n      \"pmids\": [\"30818058\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Tat-CIAPIN1 transduction into LPS-exposed macrophages reduces ROS, DNA fragmentation, MAPKs and NF-κB activation, and suppresses pro-inflammatory mediators (COX-2, iNOS, IL-6, TNF-α) and Bax/caspase-3; in a TPA-induced mouse skin inflammation model, transduced Tat-CIAPIN1 decreases inflammatory damage.\",\n      \"method\": \"Tat fusion protein cell transduction, ROS assay, DNA fragmentation, MAPK/NF-κB Western blotting, cytokine measurement, TPA mouse model\",\n      \"journal\": \"BMB reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vitro and in vivo validation with multiple signaling pathway readouts, single lab\",\n      \"pmids\": [\"31722779\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"miR-16 directly targets the 3'UTR of CIAPIN1 and negatively modulates CIAPIN1 expression; CIAPIN1 overexpression reverses hypoxia/reoxygenation-induced changes in apoptosis-associated proteins and modulates NF-κB/IκBα phosphorylation.\",\n      \"method\": \"Dual-luciferase reporter assay, RT-qPCR, Western blotting, miR-16 mimics/inhibitor, CIAPIN1 overexpression, flow cytometry\",\n      \"journal\": \"Molecular medicine reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — luciferase reporter confirms direct 3'UTR binding, rescue with CIAPIN1 overexpression, single lab\",\n      \"pmids\": [\"31432171\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"CIAPIN1 negatively regulates Tp53 transcription, promoting VSMC cell cycle progression and migration via cyclin E1–CDK2/pRb/PCNA and MMP2 pathways; CIAPIN1 also increases JAK2 expression and enhances JAK2/STAT3 phosphorylation upon vascular injury, driving phenotypic switching from contractile to synthetic state.\",\n      \"method\": \"Lentiviral gain- and loss-of-function, balloon injury and ligation neointima models in rat/mouse carotid arteries, Western blotting, cell cycle/proliferation/migration assays\",\n      \"journal\": \"British journal of pharmacology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal in vitro and in vivo gain/loss-of-function with mechanistic pathway delineation, single lab\",\n      \"pmids\": [\"34289085\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Tat-CIAPIN1 protein transduction protects pancreatic RINm5F β-cells from cytokine-induced cytotoxicity by reducing ROS/DNA fragmentation, inhibiting MAPK and NF-κB activation, elevating Bcl-2, and reducing Bax and cleaved Caspase-3.\",\n      \"method\": \"Tat fusion protein transduction, cell viability assay, ROS assay, Western blotting (MAPK, NF-κB, Bcl-2/Bax/caspase-3)\",\n      \"journal\": \"BMB reports\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single study with single-method protein delivery, no complementary genetic approach, single lab\",\n      \"pmids\": [\"34120676\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"CIAPIN1 silencing in cholangiocarcinoma KKU-100 cells suppresses migration and invasion; bioinformatic analysis of CIAPIN1-interacting proteins identified via LC-MS/MS after siRNA knockdown predicts connection to TGF-β/SMADs pathway via NOS1.\",\n      \"method\": \"siRNA knockdown, LC-MS/MS proteomics, transwell migration/invasion assay, bioinformatics pathway prediction\",\n      \"journal\": \"Journal of clinical medicine\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — direct functional assay for migration/invasion, but pathway connection to TGF-β/SMADs is bioinformatic prediction not experimentally validated; single lab\",\n      \"pmids\": [\"35807116\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"Tat-CIAPIN1 protein protects pancreatic β-cells from hIAPP-induced toxicity by reducing MAPK activation and regulating COX-2, iNOS, Bcl-2, Bax, and Caspase-3; in an HFD/STZ T2DM mouse model, Tat-CIAPIN1 ameliorated pathological changes in pancreatic β-cells and reduced fasting blood glucose.\",\n      \"method\": \"Tat fusion protein transduction, cell viability, Western blotting, T2DM mouse model (HFD+STZ), blood glucose measurement\",\n      \"journal\": \"International journal of molecular sciences\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single method of protein delivery, in vivo model without genetic controls, single lab\",\n      \"pmids\": [\"37445656\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"CIAPIN1 downregulation in breast cancer cells suppresses proliferation, migration, and glycolysis (pyruvate, lactate, ATP production) and reduces PKM2 expression and STAT3 phosphorylation, placing CIAPIN1 upstream of the STAT3/PKM2 pathway.\",\n      \"method\": \"siRNA knockdown, RT-qPCR, Western blotting, proliferation/migration assays, metabolite measurement\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single-method knockdown without rescue or complementary overexpression for pathway validation, single lab\",\n      \"pmids\": [\"39242716\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"CIAPIN1 overexpression in LPS-induced podocytes activates the PI3K/AKT pathway (elevated p-PI3K and p-Akt), increases ferroptosis-protective proteins SLC7A11 and GPX4, and attenuates ferroptosis markers (MDA, Fe2+); PI3K inhibitor LY294002 reverses these effects, confirming pathway dependency.\",\n      \"method\": \"CIAPIN1 overexpression vector, PI3K inhibitor (LY294002), Western blotting, MDA/Fe2+ measurement, RT-qPCR\",\n      \"journal\": \"BMC nephrology\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — pharmacological inhibitor confirms pathway, but no genetic rescue and single lab\",\n      \"pmids\": [\"40259237\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"CIAPIN1 promotes proliferation and migration of PDGF-BB-activated airway smooth muscle cells; knockdown inhibits p-PI3K, p-Akt, p-JAK2, and p-STAT3, placing CIAPIN1 upstream of both PI3K/AKT and JAK2/STAT3 signaling in this context.\",\n      \"method\": \"siRNA knockdown, Western blotting, proliferation/migration/apoptosis assays\",\n      \"journal\": \"Physiological reports\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single-method loss-of-function, no rescue or inhibitor epistasis, single lab\",\n      \"pmids\": [\"40338178\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"A STAT3 inhibitor (CAB) suppresses VSMC CIAPIN1 transcription via STAT3/SH2 domain binding; CIAPIN1 overexpression reverses CAB-mediated suppression of VSMC proliferation, migration, and intimal hyperplasia, establishing CIAPIN1 as a transcriptional target of STAT3 in the CIAPIN1/JAK2/STAT3 axis.\",\n      \"method\": \"Compound binding to STAT3 SH2 domain, CIAPIN1 overexpression rescue, neointima animal models, Western blotting\",\n      \"journal\": \"Acta pharmaceutica Sinica. B\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — rescue experiment with CIAPIN1 overexpression validates pathway position, in vivo neointima model, single lab\",\n      \"pmids\": [\"40370537\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"CIAPIN1 directly binds consensus sites in the Tp53 promoter (confirmed by ChIP and dual-luciferase reporter assay) and represses Tp53 transcription in VSMCs. PDGF-BB-induced ROS production promotes nuclear translocation of CIAPIN1 via a C-terminal NLS (residues 236–239) through the importin-α/β pathway; deletion of the NLS (Δ236–239) or blocking nuclear import with NAC or ivermectin restores p53 expression and reduces neointimal formation in vivo.\",\n      \"method\": \"ChIP assay, dual-luciferase reporter assay, site-directed mutagenesis of NLS, ROS scavenger (NAC), importin inhibitor (ivermectin), subcellular fractionation, rat carotid balloon injury model\",\n      \"journal\": \"Theranostics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — ChIP + luciferase reporter directly demonstrate promoter binding; NLS mutagenesis + importin inhibitor orthogonally validate nuclear trafficking mechanism; in vivo rescue confirms functional relevance\",\n      \"pmids\": [\"42094595\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"CIAPIN1 interacts functionally with OPA1 (optic atrophy 1): CIAPIN1 overexpression maintains mitochondrial membrane potential and restores mitochondrial function-related proteins in LPS-stimulated renal tubular cells, while OPA1 overexpression rescues the detrimental effects of CIAPIN1 knockdown on apoptosis and mitochondrial dysfunction, defining a CIAPIN1–OPA1 signaling axis. WTAP promotes m6A modification of CIAPIN1 mRNA, reducing its expression under LPS.\",\n      \"method\": \"Gain- and loss-of-function (overexpression and siRNA), mitochondrial membrane potential assay, Western blotting, cecal ligation and puncture AKI mouse model, m6A modification analysis\",\n      \"journal\": \"Pathology, research and practice\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — epistasis rescue (OPA1 OE reverses CIAPIN1-KD phenotype) establishes functional axis; m6A writer identified; in vivo validation; single lab\",\n      \"pmids\": [\"41713137\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"CIAPIN1 is a redox-sensitive anti-apoptotic protein that localizes to the cytoplasm and nucleus (with nucleolar accumulation), undergoes ROS-driven nuclear translocation via a C-terminal NLS through the importin-α/β pathway, directly represses Tp53 promoter transcription (established by ChIP and luciferase assay), and acts downstream of receptor tyrosine kinase–Ras signaling to regulate cell cycle progression (via CyclinD1/p27/CDK2), multidrug resistance (by transcriptionally upregulating MDR-1, Bcl-2, and suppressing Bax), vascular smooth muscle cell phenotypic switching (through JAK2/STAT3 and p53/cyclin E1–CDK2 axes), NHE1–ERK1/2-dependent migration and differentiation, PI3K/AKT-dependent ferroptosis suppression, and mitochondrial integrity via a CIAPIN1–OPA1 axis; its conserved CX2C motif is essential for function.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"CIAPIN1 is a redox-responsive anti-apoptotic and pro-proliferative factor that integrates stress and growth signals to control cell survival, cell cycle progression, and migration across diverse cell types [#3, #9, #18]. Its most directly resolved mechanism is transcriptional repression of the Tp53 tumor suppressor: CIAPIN1 binds consensus sites in the Tp53 promoter and represses its transcription, and PDGF-BB-induced ROS drives its nuclear translocation through a C-terminal NLS (residues 236-239) via the importin-\\u03b1/\\u03b2 pathway, so that NLS deletion or blockade of nuclear import restores p53 and limits neointimal formation in vivo [#26]. Consistent with a survival/proliferation role, CIAPIN1 enforces G1/S progression through cyclin D1, cyclin E, CDK2/CDK4, p27Kip1, and Rb [#3, #6], and confers multidrug resistance by upregulating MDR-1, Bcl-2/Bcl-xL and suppressing Bax, in a manner independent of glutathione status and of wild-type p53 [#0, #2, #8]. It acts upstream of NHE1-ERK1/2 signaling to govern leukemic differentiation and tumor cell migration [#11, #13] and upstream of JAK2/STAT3 to drive vascular smooth muscle phenotypic switching, with CIAPIN1 itself a transcriptional target of STAT3 in a feed-forward CIAPIN1/JAK2/STAT3 axis [#18, #25]. CIAPIN1 also suppresses ferroptosis via PI3K/AKT-dependent induction of SLC7A11 and GPX4 [#23] and preserves mitochondrial integrity through a CIAPIN1-OPA1 axis [#27]. Functional conservation is established by yeast complementation, and its twin-cysteine CX2C motif is essential for activity [#9]; recombinant CIAPIN1 lacks methyltransferase and AdoMet-binding activity despite a predicted motif [#4].\",\n  \"teleology\": [\n    {\n      \"year\": 2006,\n      \"claim\": \"Established that CIAPIN1 functions as a determinant of chemoresistance and apoptosis, defining its core cytoprotective role.\",\n      \"evidence\": \"Reciprocal cDNA overexpression and RNAi in gastric cancer cells with drug sensitivity assays and Western blotting\",\n      \"pmids\": [\"16410721\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism of MDR-1/MRP-1 upregulation not defined\", \"Direct molecular targets unidentified\"]\n    },\n    {\n      \"year\": 2006,\n      \"claim\": \"Resolved where CIAPIN1 resides, showing dual cytoplasmic/nuclear localization with nucleolar accumulation and predicting regulated nuclear trafficking.\",\n      \"evidence\": \"IHC, immunofluorescence, and subcellular fractionation in human and mouse cells\",\n      \"pmids\": [\"16957168\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"NLS/NES predictions were bioinformatic only at this stage\", \"Trigger for translocation unknown\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Linked CIAPIN1 to multidrug resistance at the transcriptional level and tied it to cell cycle arrest, distinguishing its action from glutathione-based detoxification.\",\n      \"evidence\": \"Luciferase reporter and RT-PCR in leukemia cells, plus reciprocal gain/loss with cell cycle analysis in gastric cancer cells\",\n      \"pmids\": [\"18059532\", \"18293492\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether CIAPIN1 binds MDR-1/Bcl-2 promoters directly not tested\", \"Connection between cell cycle and drug resistance roles unclear\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Tested and excluded a predicted enzymatic identity, showing CIAPIN1 is not a methyltransferase and does not bind AdoMet.\",\n      \"evidence\": \"In vitro methyltransferase/demethylase and 3H-AdoMet binding assays with purified recombinant protein\",\n      \"pmids\": [\"17935775\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Negative result does not assign an alternative biochemical activity\", \"Native cofactor, if any, unknown\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Generalized the proliferation/cell cycle role across tumor types, defining the cyclin/CDK/p27/Rb effectors that CIAPIN1 controls.\",\n      \"evidence\": \"Adenoviral RNAi/restoration in HCC and renal carcinoma with xenografts and Western blotting\",\n      \"pmids\": [\"18299278\", \"19081179\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Upstream regulator driving cyclin changes not identified\", \"Direct versus indirect control of these proteins unresolved\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Established functional conservation and identified the CX2C motif as essential, anchoring CIAPIN1 function to a defined structural element.\",\n      \"evidence\": \"Drosophila genetic alleles, yeast complementation, and CX2C mutation with proliferation/survival readouts\",\n      \"pmids\": [\"23444317\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Biochemical function of the CX2C motif not defined\", \"Whether the motif mediates metal/redox chemistry untested\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Placed CIAPIN1 upstream of NHE1-ERK1/2 signaling controlling differentiation and migration, establishing an effector pathway via epistasis.\",\n      \"evidence\": \"shRNA knockdown with NHE1 rescue and ERK inhibitor in K562 cells; overexpression with NHE1/MEK inhibitors in breast cancer cells\",\n      \"pmids\": [\"25043809\", \"25724898\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"How CIAPIN1 regulates NHE1 expression unknown\", \"Direct physical link to the pathway not shown\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Identified upstream miRNA regulation of CIAPIN1, embedding it in stress-survival circuits in cardiomyocytes.\",\n      \"evidence\": \"Dual-luciferase 3'UTR reporters and rescue knockdown for miR-182-5p and miR-16 with apoptosis assays\",\n      \"pmids\": [\"29671338\", \"31432171\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Physiological relevance of these miRNA-CIAPIN1 axes in vivo limited\", \"Downstream apoptotic mechanism inferred from protein levels\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Demonstrated that delivered CIAPIN1 protein is cytoprotective and anti-inflammatory under oxidative/inflammatory stress, implicating MAPK/NF-\\u03baB/Akt signaling.\",\n      \"evidence\": \"Tat-CIAPIN1 fusion protein transduction in neurons and macrophages with ischemia and TPA skin models\",\n      \"pmids\": [\"30818058\", \"31722779\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether endogenous CIAPIN1 acts through the same pathways untested\", \"Direct molecular targets of CIAPIN1 in these pathways unknown\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Connected CIAPIN1 to vascular remodeling by showing it represses Tp53 and activates JAK2/STAT3 to drive smooth muscle phenotypic switching.\",\n      \"evidence\": \"Lentiviral gain/loss-of-function with balloon injury/ligation neointima models and Western blotting\",\n      \"pmids\": [\"34289085\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism of Tp53 repression not yet defined here\", \"Whether JAK2/STAT3 activation is direct unresolved\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Closed a regulatory loop by establishing CIAPIN1 as a transcriptional target of STAT3, defining a feed-forward CIAPIN1/JAK2/STAT3 axis in vascular cells.\",\n      \"evidence\": \"STAT3 SH2-domain compound binding with CIAPIN1 overexpression rescue in neointima models\",\n      \"pmids\": [\"40370537\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct STAT3 binding to the CIAPIN1 promoter not shown\", \"Quantitative contribution of the loop in vivo unclear\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Extended CIAPIN1 to ferroptosis control, showing PI3K/AKT-dependent induction of SLC7A11 and GPX4.\",\n      \"evidence\": \"Overexpression with PI3K inhibitor LY294002 and ferroptosis-marker measurement in podocytes\",\n      \"pmids\": [\"40259237\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No genetic rescue of the PI3K/AKT dependency\", \"Direct link between CIAPIN1 and PI3K activation unestablished\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"Provided the definitive mechanism for CIAPIN1's transcriptional action, demonstrating direct Tp53 promoter binding and ROS-triggered importin-dependent nuclear import.\",\n      \"evidence\": \"ChIP and luciferase reporters, NLS site-directed mutagenesis, NAC/ivermectin blockade, and carotid balloon injury model\",\n      \"pmids\": [\"42094595\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether CIAPIN1 acts alone or with cofactors at the Tp53 promoter unknown\", \"Structural basis of DNA binding not resolved\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"Defined a mitochondrial protective function via a CIAPIN1-OPA1 axis and identified WTAP-mediated m6A modification as an upstream regulator.\",\n      \"evidence\": \"Gain/loss-of-function with OPA1 rescue, membrane potential assays, m6A analysis, and a sepsis AKI model\",\n      \"pmids\": [\"41713137\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct physical interaction of CIAPIN1 with OPA1 not demonstrated\", \"Mechanism by which CIAPIN1 stabilizes OPA1 unknown\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"The intrinsic biochemical activity of CIAPIN1 and the function of its essential CX2C motif remain undefined, leaving open how a single protein executes transcriptional repression, redox sensing, and mitochondrial protection.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No assigned catalytic or cofactor-binding activity\", \"No structural model of DNA binding or partner engagement\", \"Mechanistic unity across its many reported pathways untested\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [26, 2, 18]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [26]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [1, 26]},\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [1, 26]},\n      {\"term_id\": \"GO:0005730\", \"supporting_discovery_ids\": [1]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [3, 6, 18]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [18, 25, 24]},\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [0, 14, 23]},\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [26]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"TP53\", \"OPA1\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":6,"faith_total":6,"faith_pct":100.0}}