{"gene":"AKR1B10","run_date":"2026-06-09T22:02:43","timeline":{"discoveries":[{"year":2005,"finding":"AKR1B10 was purified in its native form from human liver cytosol and shown to catalyze NADPH-dependent carbonyl reduction of xenobiotics including dolasetron, daunorubicin, oracin, and NNK (carcinogen), as well as NADP+-dependent oxidation of (S)-1-indanol; kinetic parameters were determined for each substrate.","method":"Protein purification from human liver cytosol; HPLC-based kinetic assays with recombinant and native enzyme","journal":"Drug metabolism and disposition","confidence":"High","confidence_rationale":"Tier 1 / Strong — native protein purification combined with rigorous in vitro kinetic characterization across multiple substrates; first purification of native form","pmids":["16381663"],"is_preprint":false},{"year":2008,"finding":"AKR1B10 efficiently catalyzes NADPH-dependent reduction of toxic lipid peroxidation aldehydes 4-HNE (Km=0.3 mM, kcat=43 min⁻¹), 4-ONE (Km=0.3 mM, kcat=40 min⁻¹), and 4-methylpentanal (Km=0.05 mM, kcat=25 min⁻¹). 4-ONE inactivates AKR1B10 in the absence of NADPH, and NADPH pre-incubation protects the enzyme. The C299S mutant retains activity but is still inactivated by 4-ONE in the absence of NADPH, implicating Cys299 in NADPH-dependent protection.","method":"Recombinant enzyme kinetic assays; site-directed mutagenesis (C299S); NADPH protection experiment","journal":"Chemico-biological interactions","confidence":"High","confidence_rationale":"Tier 1 / Strong — in vitro reconstitution with kinetic parameters, mutagenesis validation, and mechanistic protection assay in single rigorous study","pmids":["19013440"],"is_preprint":false},{"year":2008,"finding":"AKR1B10 oxidizes a wide range of polycyclic aromatic hydrocarbon (PAH) trans-dihydrodiols to PAH o-quinones in vitro, though with stereospecificity for minor diastereomers. Retinal reductase activity of AKR1B10 is 5- to 150-fold greater than PAH trans-dihydrodiol oxidation, suggesting its predominant role in lung carcinogenesis is through dysregulation of retinoic acid homeostasis rather than PAH activation.","method":"In vitro enzymatic assay with recombinant AKR1B10; substrate panel oxidation measured; retinal reductase activity compared in A549 cell lysates","journal":"Chemical research in toxicology","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro reconstitution with multiple substrates and direct catalytic efficiency comparison; single lab but rigorous biochemical quantitation","pmids":["18788756"],"is_preprint":false},{"year":2008,"finding":"AKR1B10 catalyzes NADPH-dependent reduction of daunorubicin carbonyl groups (Km=1.1 mM, kcat=1.4 min⁻¹). The C299S mutation reduces substrate affinity for dl-glyceraldehyde (Km increases from 2.2 to 15.8 mM) but increases kcat, resulting in reduced overall catalytic efficiency; this mutation also alters inhibitor kinetics (sorbinil and EBPC no longer inhibit C299S mutant).","method":"In vitro kinetic assay with wild-type and C299S mutant recombinant AKR1B10; inhibitor kinetic analyses","journal":"Chemico-biological interactions","confidence":"High","confidence_rationale":"Tier 1 / Strong — in vitro reconstitution with mutagenesis across multiple substrates and inhibitors; corroborated by independent study (PMID:18325492)","pmids":["19028477","18325492"],"is_preprint":false},{"year":2009,"finding":"AKR1B10 efficiently reduces long-chain aliphatic aldehydes including farnesal and geranylgeranial (from the mevalonate/prenylation pathway), oxidizes 20α-hydroxysteroids, and is inhibited by steroid hormones and bile acids (IC50 0.03–25 µM). Kinetic analyses and docking suggest inhibitory steroids and tolrestat bind overlapping sites within the active site of the enzyme-coenzyme complex, proposing a novel role for AKR1B10 in isoprenoid homeostasis.","method":"Recombinant AKR1B10 and AKR1B1 comparative kinetic assays; inhibition studies; molecular docking","journal":"Archives of biochemistry and biophysics","confidence":"High","confidence_rationale":"Tier 1 / Strong — comparative in vitro kinetics with multiple substrate classes, inhibition characterization, and structural modeling; published in dedicated mechanistic study","pmids":["19464995"],"is_preprint":false},{"year":2010,"finding":"Cigarette smoke extract upregulates AKR1B10 expression in airway epithelial cells in vitro, and transfection of AKR1B10 into airway epithelial cells enhances conversion of retinal to retinol, directly demonstrating AKR1B10's role in retinol/retinoic acid metabolism in airway cells.","method":"In vitro cigarette smoke extract treatment; AKR1B10 transfection with functional retinal-to-retinol conversion assay","journal":"Chest","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct functional overexpression assay with metabolic readout, single lab, two orthogonal approaches (CSE induction + transfection)","pmids":["20705797"],"is_preprint":false},{"year":2011,"finding":"AKR1B10 reduces the C13-ketonic group on the side chain of daunorubicin and idarubicin to hydroxyl forms (daunorubicinol, idarubicinol), conferring cellular resistance. Kinetic parameters: daunorubicin Vmax=837 nmol/mg/min, Km=9.3 mM; idarubicin Vmax=460 nmol/mg/min, Km=0.46 mM (higher efficiency). AKR1B10 was less active toward doxorubicin and epirubicin (which have a C14-hydroxyl group). The AKR1B10 inhibitor epalrestat synergized with these drugs in cells.","method":"In vitro enzymatic assay with recombinant AKR1B10; HPLC quantitation in living cells; ectopic AKR1B10 expression with drug resistance assay; pharmacological inhibition with epalrestat","journal":"Toxicology and applied pharmacology","confidence":"High","confidence_rationale":"Tier 1 / Strong — in vitro reconstitution with rigorous kinetics, cellular functional assay with multiple substrates, and pharmacological validation; replicates prior biochemical findings","pmids":["21640744"],"is_preprint":false},{"year":2011,"finding":"Prostaglandin A1 (PGA1) covalently modifies AKR1B10 at Cys299, selectively among AKR family members. Mutation of Cys299 abolishes PGA1-biotin incorporation; mutation of His111 or Tyr49 reduces the interaction. Modification by PGA1 correlates with loss of AKR1B10 enzymatic activity. In lung cancer cells, PGA1 reduced tumorigenic potential and increased accumulation of the AKR1B10 substrate doxorubicin.","method":"Biotinylated PGA1 pulldown; site-directed mutagenesis (C299S, H111, Y49); enzymatic activity assay; molecular modeling; cell-based doxorubicin accumulation assay","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 1 / Strong — covalent modification confirmed by mutagenesis of active site residues, loss-of-function enzymatic assay, and cellular functional validation with multiple orthogonal methods","pmids":["21507934"],"is_preprint":false},{"year":2012,"finding":"siRNA-mediated silencing of AKR1B10 in pancreatic cancer cells increased non-farnesylated HDJ2 protein, decreased membrane-bound prenylated KRAS protein, and downregulated phosphorylated ERK, MEK, and membrane-bound E-cadherin, demonstrating that AKR1B10 promotes protein prenylation (farnesylation of KRAS) and downstream Ras/ERK signaling.","method":"siRNA knockdown; Western blot for prenylated KRAS, HDJ2, p-ERK, p-MEK; immunohistochemistry in pancreatic cancer specimens","journal":"Modern pathology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — clean siRNA knockdown with specific functional readouts (prenylation markers, downstream signaling), single lab, mechanistically coherent","pmids":["22222635"],"is_preprint":false},{"year":2013,"finding":"Crystal structures of AKR1B10 holoenzyme revealed that Trp112 adopts a native conformation stabilized by a Gln114-centered hydrogen bond network; AKR1B1 inhibitors can induce a Trp112 flip to create an 'AKR1B1-like' active site in AKR1B10, while selective AKR1B10 inhibitors exploit the broader active site provided by the native Trp112 orientation.","method":"X-ray crystallography of AKR1B10 holoenzyme with inhibitor complexes; structure-activity analysis","journal":"FEBS letters","confidence":"High","confidence_rationale":"Tier 1 / Moderate — crystal structure with functional SAR interpretation; structural basis for inhibitor selectivity directly demonstrated","pmids":["24100137"],"is_preprint":false},{"year":2013,"finding":"HSP90α (heat shock protein 90α) physically associates with AKR1B10, translocates it to secretory lysosomes, and mediates its non-classical secretion. Ectopic HSP90α increased AKR1B10 secretion; the HSP90 inhibitor geldanamycin dissociated AKR1B10-HSP90α complexes and reduced secretion. Helix 10 (amino acids 233–240) of AKR1B10 mediates HSP90α binding, with Lys233, Glu236, and Lys240 identified as key residues by targeted point mutations.","method":"Co-immunoprecipitation; ectopic overexpression; geldanamycin inhibition; GFP-fusion protein secretion assay; site-directed mutagenesis of helix 10 residues","journal":"Journal of Biological Chemistry","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — reciprocal Co-IP, mutagenesis identifying specific binding residues, pharmacological inhibition, and functional secretion readout; multiple orthogonal methods in single study","pmids":["24217247"],"is_preprint":false},{"year":2013,"finding":"Sulindac competitively inhibits AKR1B10 activity in pancreatic cancer cells in a dose-dependent manner. siRNA silencing or sulindac treatment reduced KRAS and HDJ2 prenylation and downregulated phospho-c-Raf, ERK1/2, and MEK1/2. In LSL-KrasG12D-Trp53R172H-Pdx1-Cre mice, sulindac reduced pancreatic cancer incidence (90% to 56%) and increased survival, establishing AKR1B10 inhibition as sufficient to suppress KRAS prenylation and downstream Ras signaling in vivo.","method":"In vitro AKR1B10 activity assay with dose-response; siRNA knockdown; Western blot; transgenic mouse pancreatic cancer model with sulindac treatment","journal":"Carcinogenesis","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — in vitro biochemical inhibition assay, siRNA genetic validation, and in vivo transgenic mouse model all converge on same mechanism; multiple orthogonal methods","pmids":["23689354"],"is_preprint":false},{"year":2013,"finding":"shRNA-mediated silencing of AKR1B10 in hepatocellular carcinoma cells increased cell apoptosis, decreased colony formation, and enhanced cytoreductive response to doxorubicin chemotherapy, establishing AKR1B10 as a functional contributor to HCC cell survival and chemoresistance.","method":"shRNA knockdown; colony formation assay; apoptosis assay; doxorubicin cytotoxicity assay","journal":"Human pathology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — clean shRNA knockdown with multiple functional readouts (apoptosis, proliferation, drug resistance), single lab","pmids":["24656094"],"is_preprint":false},{"year":2016,"finding":"AKR1B10 overexpression in breast cancer cells MCF-7 and MDA-MB-231 upregulated integrin α5 and δ-catenin, activated FAK signaling, and stimulated Rac1-mediated cell migration. siRNA silencing of integrin α5 or δ-catenin eradicated AKR1B10-enhanced adhesion and migration, establishing that AKR1B10 promotes metastasis through the integrin α5/δ-catenin/FAK/Src/Rac1 pathway.","method":"Ectopic AKR1B10 expression; siRNA silencing of integrin α5 and δ-catenin; migration/invasion assays; Western blot for FAK/Src/Rac1 signaling; in vivo lung metastasis model in nude mice","journal":"Oncotarget","confidence":"High","confidence_rationale":"Tier 2 / Strong — epistasis by double knockdown of pathway components, multiple cell lines, in vivo validation, and correlation in human tumor specimens","pmids":["27248472"],"is_preprint":false},{"year":2017,"finding":"AKR1B10 overexpression in breast cancer cells MCF-7 activated ERK1/2 signaling and upregulated MMP2 and vimentin expression, promoting cell migration and invasion. The MEK inhibitor PD98059 blocked AKR1B10-induced migration and MMP2/vimentin expression, placing AKR1B10 upstream of the ERK/MMP2 axis.","method":"Ectopic AKR1B10 expression and siRNA silencing; wound healing, transwell migration, and matrigel invasion assays; Western blot for p-ERK, MMP2, vimentin; MEK inhibitor epistasis","journal":"Oncotarget","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — gain and loss of function with pharmacological epistasis in two cell lines; single lab","pmids":["28402270"],"is_preprint":false},{"year":2017,"finding":"AKR1B10 transfection into normal human keratinocytes reproduced an abnormal retinoic acid pathway expression pattern found in keloid epidermis. Co-transfection with a luciferase reporter showed reduced retinoic acid response element (RARE) activity, indicating that AKR1B10 overexpression causes retinoic acid synthesis deficiency. Conditioned medium from AKR1B10-overexpressing keratinocytes upregulated TGF-β1, TGF-β2, and collagens I and III in fibroblasts.","method":"Transfection-based RARE luciferase reporter assay; conditioned medium transfer experiment; Western blot/qPCR for TGF-β and collagen","journal":"Journal of Investigative Dermatology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — luciferase reporter assay and paracrine functional assay, single lab, mechanistically coherent with known AKR1B10 retinal reductase activity","pmids":["27025872"],"is_preprint":false},{"year":2018,"finding":"IRAK1 transcriptionally upregulates AKR1B10 expression in hepatocellular carcinoma via the AP-1 complex. Knockdown of AKR1B10 negated IRAK1-induced tumor-initiating cell functions. IRAK4/IRAK1/AP-1/AKR1B10 constitutes an epistatic signaling cascade regulating cancer stemness and drug resistance.","method":"Transcriptome sequencing; knockdown/overexpression of IRAK1 and AKR1B10; AP-1 reporter assay; sphere and TIC assays; xenograft model with IRAK1/4 inhibitor","journal":"Cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — epistasis established by rescue experiment (AKR1B10 KD negates IRAK1 phenotype), multiple functional assays, single lab","pmids":["29483095"],"is_preprint":false},{"year":2018,"finding":"AKR1B10 ectopic expression in breast cancer cells MCF-7 promoted lipogenesis and elevated lipid second messengers PIP2, DAG, and IP3. AKR1B10 regulated total DAG and most DAG subspecies levels (confirmed by LC-MS), leading to activation of PKC isoforms (PKCδ, PKCµ, PKCα/βII) and the PKC/c-Raf/MEK/ERK cascade. A pan-PKC inhibitor (Go6983) blocked AKR1B10-induced ERK1/2 activation, establishing the DAG→PKC→ERK pathway as AKR1B10's mechanism for promoting proliferation.","method":"Ectopic AKR1B10 expression and siRNA silencing; LC-MS lipidomics for DAG species; Western blot for PKC phosphorylation and ERK signaling; pharmacological inhibition (Go6983, U0126, PD98059); 3D culture and xenograft","journal":"Molecular carcinogenesis","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — LC-MS lipidomics, multiple pharmacological epistasis experiments, gain and loss of function, and in vivo validation; multiple orthogonal methods in single rigorous study","pmids":["29846015"],"is_preprint":false},{"year":2019,"finding":"AKR1B10 silencing in brain-metastatic lung cancer cells suppressed MMP-2 and MMP-9 expression via the MEK/ERK signaling pathway, reducing extravasation through the blood-brain barrier in Transwell, microfluidic chip, and in vivo models.","method":"siRNA silencing; Transwell BBB model; multi-organ microfluidic chip; in vivo brain metastasis nude mouse model; Western blot for MMP-2/9 and MEK/ERK","journal":"Acta biomaterialia","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — loss-of-function in three complementary models (in vitro, ex vivo chip, in vivo) with defined signaling readouts; single lab","pmids":["31034948"],"is_preprint":false},{"year":2021,"finding":"AKR1B10 interacts with and inhibits the nuclear translocation of GAPDH in colon cancer cells. This interaction is associated with an NADPH-dependent reduction reaction between AKR1B10 and GAPDH. AKR1B10 reductase activity is required for repression of autophagy under glucose starvation.","method":"Co-immunoprecipitation; knockdown and overexpression; nuclear fractionation; enzymatic activity-dead mutant studies; autophagy markers","journal":"Journal of cell science","confidence":"Medium","confidence_rationale":"Tier 2–3 / Moderate — Co-IP identifies GAPDH as binding partner, enzymatic activity required for functional effect demonstrated by mutant, single lab","pmids":["33758077"],"is_preprint":false},{"year":2021,"finding":"AKR1B10 overexpression in breast cancer cells activates PI3K, AKT, and NF-κB p65, induces nuclear translocation of NF-κB p65, and increases proliferation-related (c-myc, cyclinD1, Survivin) and EMT-related (ZEB1, SLUG, Twist) proteins. The PI3K inhibitor LY294002 attenuated these effects, placing AKR1B10 upstream of the PI3K/AKT/NF-κB cascade.","method":"AKR1B10 overexpression and shRNA knockdown; Western blot for PI3K/AKT/NF-κB pathway; LY294002 pharmacological epistasis; nuclear fractionation; xenograft model","journal":"Cell & bioscience","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — gain and loss of function with pharmacological epistasis, single lab; pathway placement supported by inhibitor rescue","pmids":["34419144"],"is_preprint":false},{"year":2021,"finding":"CBX7 directly represses AKR1B10 transcription in a PRC1-dependent manner in urinary bladder cancer cells, as determined by ChIP assay. AKR1B10 overexpression reversed CBX7-suppressed ERK signaling, and AKR1B10 siRNA or oleanolic acid inhibitor reversed CBX7 deficiency-induced aggressiveness, establishing CBX7→AKR1B10→ERK as an epigenetic regulatory axis.","method":"RNA-seq; ChIP assay; siRNA and overexpression; ERK signaling Western blot; pharmacological AKR1B10 inhibition; xenograft","journal":"Cell death & disease","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP confirms direct epigenetic regulation, epistasis by double manipulation; single lab","pmids":["34035231"],"is_preprint":false},{"year":2021,"finding":"AKR1B10 promotes NF-κB-dependent expression of pro-inflammatory cytokines IL-1α and IL-6 in colon cancer cells stimulated by LPS; this effect depends on AKR1B10's reductase activity, as a reductase-dead mutant fails to activate NF-κB signaling.","method":"siRNA knockdown; AKR1B10 overexpression; reductase-dead mutant; Western blot and ELISA for IL-1α, IL-6, NF-κB pathway components; LPS stimulation model","journal":"Journal of molecular histology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reductase-dead mutant mechanistically links enzymatic activity to NF-κB activation; single lab, two orthogonal methods","pmids":["35920984"],"is_preprint":false},{"year":2021,"finding":"SMARCA4 activates AKR1B10 expression in liver cancer cells through an IRAK1 enhancer, as demonstrated by ChIP-qPCR and luciferase assays showing SMARCA4 binding to the IRAK1 active enhancer. IRAK1 transcriptional activation then induces AKR1B10 expression, establishing the SMARCA4→IRAK1 enhancer→IRAK1→AKR1B10 axis in hepatocarcinogenesis.","method":"ChIP-qPCR; luciferase reporter assay; siRNA and overexpression; in vivo Ras-transgenic mouse model","journal":"Oncogene","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP and luciferase assays directly demonstrate enhancer occupancy and transcriptional activation; validated in vivo; single lab","pmids":["34140644"],"is_preprint":false},{"year":2022,"finding":"AUF1 binds the 3'UTR of AKR1B10 mRNA and stabilizes it, increasing AKR1B10 protein expression. This post-transcriptional mechanism mediates AUF1-induced HCC cell proliferation and doxorubicin resistance; AKR1B10 knockdown negated AUF1's pro-tumor effects. E2F1 transcriptionally drives AUF1 expression, establishing an E2F1/AUF1/AKR1B10 regulatory axis.","method":"RNA-binding pulldown; 3'UTR binding assay; siRNA rescue experiments; mRNA stability assay; E2F1 transcription factor reporter and ChIP","journal":"Cancer science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — 3'UTR-binding and mRNA stabilization functionally validated by rescue epistasis; single lab; multiple orthogonal methods","pmids":["35178834"],"is_preprint":false},{"year":2022,"finding":"METTL3 methyltransferase directly binds and adds m6A modification to AKR1B10 mRNA, enhancing AKR1B10 expression in cholangiocarcinoma. MeRIP-qPCR confirmed AKR1B10 m6A modification. AKR1B10 knockdown rescued the tumor-promoting effects of METTL3 overexpression, including proliferation, migration, invasion, glycolysis, and lactate production.","method":"RNA-seq; MeRIP-qPCR; METTL3 overexpression/knockdown; siRNA rescue (AKR1B10); xenograft; tissue microarray","journal":"Cancer cell international","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — m6A modification confirmed by MeRIP-qPCR at specific site, epistasis rescue validates pathway position; single lab","pmids":["36476503"],"is_preprint":false},{"year":2022,"finding":"AKR1B10 overexpression in macrophages and lung cells induces pro-inflammatory cytokines IL-6, IL-1β, and TNFα. The AKR1B10 inhibitor zopolrestat significantly reduces LPS-induced production of these cytokines. AKR1B10 can be secreted and transferred via extracellular vesicles between different cell types.","method":"AKR1B10 overexpression in macrophages/lung cells; LPS stimulation; cytokine ELISA; pharmacological inhibition with zopolrestat; extracellular vesicle isolation and transfer experiments","journal":"International journal of molecular sciences","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — gain-of-function plus pharmacological epistasis in cell models; extracellular vesicle transfer demonstrated; single lab","pmids":["35163833"],"is_preprint":false},{"year":2021,"finding":"In dasatinib inhibition studies, AKR1B10 was identified as a direct target with Ki=0.6 µM (recombinant enzyme) and IC50=0.5 µM (cellular). Dasatinib selectively inhibited AKR1B10-mediated daunorubicin reduction, attenuating daunorubicin resistance in AKR1B10-overexpressing cancer cells.","method":"Recombinant enzyme inhibition assay; IC50 determination in AKR1B10-overexpressing cells; drug resistance assay with daunorubicin","journal":"Biochemical pharmacology","confidence":"Medium","confidence_rationale":"Tier 1–2 / Moderate — in vitro enzymatic assay plus cellular model; single lab; dasatinib identified as AKR1B10 inhibitor with defined kinetics","pmids":["34339712"],"is_preprint":false},{"year":2023,"finding":"AKR1B10 promotes glycolysis by regulating LDHA expression and increasing lactate production in lung cancer brain metastasis cells. Elevated lactate acts as a precursor for histone lactylation (H4K12la), which activates CCNB1 transcription and accelerates DNA replication and cell cycle progression, establishing the AKR1B10/glycolysis/H4K12la/CCNB1 axis as a mechanism of pemetrexed resistance.","method":"GC-MS metabolomics; RNA-seq; Western blot for LDHA, H4K12la, CCNB1; siRNA knockdown; in vitro and in vivo drug sensitivity assays","journal":"Journal of translational medicine","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multi-omic approach (metabolomics + transcriptomics) with mechanistic validation by Western blot; single lab; pathway epistasis coherent","pmids":["37587486"],"is_preprint":false},{"year":2024,"finding":"Berberine directly binds AKR1B10 protein (validated by click chemistry proteomics, DARTS, CETSA, SPR, and fluorescence co-localization). Berberine decreased AKR1B10 expression and activity. AKR1B10 knockdown recapitulated berberine's effects on lipid/glucose metabolism (ACC1, CPT-1, GLUT2) and PPAR signaling in NAFLD models; these effects were abolished when AKR1B10 was knocked down, confirming AKR1B10 as the direct target.","method":"Click chemistry proteomics; DARTS; CETSA; SPR; fluorescence co-localization; shRNA/siRNA knockdown; RNA-seq; NAFLD mouse model","journal":"Journal of ethnopharmacology","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — five orthogonal target engagement methods (DARTS, CETSA, SPR, click chemistry, fluorescence co-localization) in a single study; genetic rescue confirms target","pmids":["38762210"],"is_preprint":false},{"year":2024,"finding":"AKR1B10 suppresses ferroptosis in triple-negative breast cancer MDA-MB-231 cells by activating the AKT(Ser473)/GSK3β(Ser9)/NRF2/GPX4 pathway. AKR1B10 overexpression increased GPX4, FTH1, HO-1, and NQO-1 expression; the AKT inhibitor OSU-T315 reversed AKR1B10-suppressed ferroptosis. The ferroptosis inhibitor ferrostatin-1 rescued cell death, confirming the ferroptosis mechanism.","method":"Stable lentiviral overexpression and knockdown; RSL3-induced ferroptosis model; C11-BODIPY lipid ROS flow cytometry; Western blot for AKT/GSK3β/NRF2/GPX4; pharmacological inhibition (OSU-T315, ferrostatin-1); RNA-seq; KEGG/GSEA pathway analysis","journal":"Frontiers in bioscience","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — pathway epistasis via pharmacological inhibition with rescue; multiple signaling readouts; single lab, multiple orthogonal methods","pmids":["40613296"],"is_preprint":false},{"year":2017,"finding":"The functional antioxidant response element (ARE) for AKR1B10 transcription was mapped to the region between -530 and -520 bp (ARE-A) from the translation start site using luciferase reporter deletion and mutation analyses. ARE-A functions cooperatively with an adjacent AP-1 site for augmented Nrf2-mediated gene regulation.","method":"Luciferase reporter assays with ARE deletion and point mutants; Nrf2 activation studies","journal":"Chemico-biological interactions","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — luciferase reporter with systematic mutagenesis of multiple AREs; single lab; direct mapping of functional promoter element","pmids":["28219640"],"is_preprint":false},{"year":2012,"finding":"Site-directed mutagenesis of AKR1B10 active site residues Phe123, Trp220, Val301, and Gln303 reduced tight binding of γ-mangostin (competitive inhibitor, Ki=5.6 nM), establishing these residues as important for inhibitor binding in the substrate-binding site.","method":"Site-directed mutagenesis; recombinant enzyme inhibition kinetics; molecular docking","journal":"Biological & pharmaceutical bulletin","confidence":"Medium","confidence_rationale":"Tier 1 / Moderate — in vitro mutagenesis with kinetic validation; single lab; identifies specific active site residues","pmids":["23123477"],"is_preprint":false},{"year":2023,"finding":"RNF152 ubiquitinates IRAK1 (demonstrated by co-IP and ubiquitination assay), reducing IRAK1 stability in lung adenocarcinoma cells. This decreases IRAK1-mediated AKR1B10 expression, suppressing fatty acid oxidation and the malignant phenotype. Ectopic IRAK1 restored AKR1B10 expression in RNF152-overexpressing cells, establishing RNF152/IRAK1 ubiquitination as an upstream regulator of AKR1B10.","method":"Co-IP; ubiquitination assay; IRAK1 and AKR1B10 overexpression rescue; xenograft model; fatty acid oxidation assay","journal":"American journal of pathology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP and rescue epistasis establish pathway position; single lab; consistent with established IRAK1→AKR1B10 axis","pmids":["37717980"],"is_preprint":false}],"current_model":"AKR1B10 is a cytosolic NADPH-dependent reductase that catalyzes reduction of diverse carbonyl substrates (retinals, isoprenoid aldehydes farnesal/geranylgeranial, lipid peroxidation products 4-HNE/4-ONE, toxic xenobiotics, and anthracycline drugs) and oxidation of aliphatic alcohols; it promotes protein prenylation (KRAS farnesylation) and downstream Ras/ERK signaling, activates DAG-mediated PKC/ERK and PI3K/AKT/NF-κB cascades to drive proliferation and metastasis, and confers drug resistance by inactivating anthracyclines; its secretion is mediated by HSP90α binding to helix 10 via lysosomes; its transcription is governed by a functional ARE-A/AP-1 element under Nrf2 control and is regulated upstream by the SMARCA4/IRAK1 and E2F1/AUF1 axes, while its mRNA is stabilized by AUF1 and m6A-modified by METTL3; Cys299 is a critical active-site residue targeted by cyclopentenone prostaglandins and is protected from inactivation by NADPH."},"narrative":{"mechanistic_narrative":"AKR1B10 is a cytosolic NADPH-dependent aldo-keto reductase that detoxifies and metabolizes a broad panel of carbonyl substrates, positioning it at the interface of lipid, retinoid, isoprenoid, and xenobiotic metabolism and cancer cell signaling [PMID:16381663, PMID:19013440, PMID:19464995]. Biochemically, the enzyme reduces reactive lipid peroxidation aldehydes (4-HNE, 4-ONE), long-chain isoprenoid aldehydes (farnesal, geranylgeranial), retinals, and xenobiotic and anthracycline carbonyls, while also oxidizing aliphatic alcohols and certain hydroxysteroids [PMID:16381663, PMID:19013440, PMID:18788756, PMID:19464995]. Cys299 is a critical active-site residue that, together with His111 and Tyr49, governs catalysis and is the covalent target of cyclopentenone prostaglandins; NADPH binding protects the enzyme from carbonyl-mediated inactivation at this residue [PMID:19013440, PMID:21507934]. Crystallographic analysis shows the native Trp112 orientation defines a broad active site exploited by selective inhibitors [PMID:24100137]. Through its reductase activity AKR1B10 supports protein prenylation, sustaining KRAS farnesylation and downstream Raf/MEK/ERK signaling, and its inhibition suppresses KRAS prenylation and tumorigenesis in vivo [PMID:22222635, PMID:23689354]. In cancer cells it drives proliferation, migration, and metastasis by elevating lipid second messengers that activate PKC/ERK, by engaging integrin α5/δ-catenin/FAK/Rac1 and ERK/MMP axes, and by activating PI3K/AKT/NF-κB signaling [PMID:27248472, PMID:28402270, PMID:29846015, PMID:34419144]. It also reprograms metabolism—promoting glycolysis and histone lactylation—and confers anthracycline and other chemoresistance by reducing drug carbonyls, an activity blocked by inhibitors such as epalrestat and dasatinib [PMID:21640744, PMID:24656094, PMID:34339712, PMID:37587486]. Its reductase activity additionally restrains GAPDH nuclear translocation and autophagy, suppresses ferroptosis via the AKT/NRF2/GPX4 axis, and shapes retinoic-acid-dependent transcription and paracrine TGF-β/collagen programs [PMID:33758077, PMID:40613296, PMID:27025872]. AKR1B10 is secreted non-classically through HSP90α binding to its helix 10 and lysosomal routing [PMID:24217247]. Its expression is controlled by an Nrf2-responsive ARE-A/AP-1 promoter element and by upstream SMARCA4/IRAK1 and CBX7/PRC1 transcriptional regulators, post-transcriptionally stabilized by AUF1 and m6A-modified by METTL3 [PMID:28219640, PMID:34140644, PMID:34035231, PMID:35178834, PMID:36476503].","teleology":[{"year":2005,"claim":"Establishing AKR1B10 as a genuine NADPH-dependent carbonyl reductase required isolating the native enzyme and demonstrating catalysis on defined substrates, which this work delivered for xenobiotics and a carcinogen.","evidence":"Native protein purification from human liver cytosol with HPLC kinetic assays on dolasetron, daunorubicin, oracin, and NNK","pmids":["16381663"],"confidence":"High","gaps":["Physiological substrate hierarchy not established","No structural basis for substrate selectivity"]},{"year":2008,"claim":"Defining AKR1B10's role in detoxifying reactive carbonyls and identifying Cys299 as a redox-sensitive residue clarified both a protective function and a regulatory vulnerability of the enzyme.","evidence":"Recombinant kinetics on 4-HNE/4-ONE/4-methylpentanal, C299S mutagenesis, and NADPH protection assays","pmids":["19013440"],"confidence":"High","gaps":["In vivo relevance of 4-HNE detoxification not tested","Mechanism of NADPH protection at Cys299 not fully resolved"]},{"year":2008,"claim":"Comparing retinal reductase versus PAH dihydrodiol oxidation activities resolved which catalytic role dominates, pointing to retinoic acid homeostasis dysregulation over carcinogen activation.","evidence":"In vitro substrate panel oxidation and catalytic efficiency comparison in A549 lysates","pmids":["18788756"],"confidence":"High","gaps":["Cellular retinoid flux not directly quantified here","PAH-quinone biological consequences untested"]},{"year":2009,"claim":"Identifying farnesal and geranylgeranial as efficient substrates connected AKR1B10 to isoprenoid/prenylation metabolism, suggesting a role beyond xenobiotic detoxification.","evidence":"Comparative AKR1B10/AKR1B1 kinetics, steroid/bile-acid inhibition, and docking","pmids":["19464995"],"confidence":"High","gaps":["Direct link to cellular prenylation not yet shown at this stage","Physiological inhibitor concentrations unclear"]},{"year":2011,"claim":"Mapping covalent PGA1 modification to Cys299 with loss of enzymatic activity established a chemical handle for inactivating AKR1B10 and confirmed active-site residues.","evidence":"Biotinylated-PGA1 pulldown, C299S/H111/Y49 mutagenesis, activity assays, cellular doxorubicin accumulation","pmids":["21507934"],"confidence":"High","gaps":["Endogenous prostaglandin regulation of AKR1B10 not demonstrated","Therapeutic exploitation untested in vivo"]},{"year":2011,"claim":"Demonstrating reduction of anthracycline C13-ketones to inactive alcohols mechanistically explained AKR1B10-mediated drug resistance and its reversal by inhibition.","evidence":"Recombinant kinetics, cellular HPLC quantitation, drug resistance assays with epalrestat synergy","pmids":["21640744"],"confidence":"High","gaps":["Clinical relevance in patients not addressed","Substrate specificity vs doxorubicin only partly explained"]},{"year":2013,"claim":"Crystal structures of the holoenzyme provided the structural basis for inhibitor selectivity by defining the native Trp112 conformation and its flip in AKR1B1-like states.","evidence":"X-ray crystallography of AKR1B10 holoenzyme with inhibitor complexes and SAR analysis","pmids":["24100137"],"confidence":"High","gaps":["No substrate-bound complex resolved","Conformational dynamics in solution untested"]},{"year":2013,"claim":"Linking AKR1B10 to KRAS prenylation and Ras/ERK signaling, and showing inhibition suppresses pancreatic tumorigenesis in vivo, converted a biochemical activity into an oncogenic mechanism.","evidence":"siRNA knockdown with prenylation/signaling Western blots; sulindac inhibition in a KrasG12D-Trp53 transgenic mouse model","pmids":["22222635","23689354"],"confidence":"Medium","gaps":["Direct reduction of a prenylation precursor in cells not biochemically isolated","Sulindac off-target effects not excluded"]},{"year":2013,"claim":"Identifying HSP90α binding to helix 10 and lysosomal routing explained how a cytosolic enzyme is secreted, expanding its potential extracellular and biomarker roles.","evidence":"Reciprocal Co-IP, geldanamycin dissociation, GFP-fusion secretion assay, helix-10 point mutagenesis","pmids":["24217247"],"confidence":"High","gaps":["Function of secreted AKR1B10 not defined here","Trigger for secretion in physiological contexts unknown"]},{"year":2013,"claim":"shRNA silencing showing increased apoptosis and chemosensitivity in hepatocellular carcinoma established AKR1B10 as a functional survival factor, not merely a marker.","evidence":"shRNA knockdown with colony formation, apoptosis, and doxorubicin cytotoxicity assays","pmids":["24656094"],"confidence":"Medium","gaps":["Molecular mediator of survival not identified","Single cell-type context"]},{"year":2016,"claim":"Defining the integrin α5/δ-catenin/FAK/Rac1 pathway gave AKR1B10 a concrete pro-metastatic signaling mechanism validated by epistasis.","evidence":"Ectopic expression, double siRNA of integrin α5/δ-catenin, migration assays, lung metastasis model","pmids":["27248472"],"confidence":"High","gaps":["How reductase activity links to integrin upregulation unresolved","Direct molecular intermediates absent"]},{"year":2017,"claim":"Mapping the ARE-A/AP-1 promoter element placed AKR1B10 under Nrf2-driven antioxidant transcriptional control, explaining its induction by oxidative/xenobiotic stress.","evidence":"Luciferase reporter deletion/mutation analysis with Nrf2 activation","pmids":["28219640"],"confidence":"Medium","gaps":["Endogenous Nrf2 occupancy not shown by ChIP here","Cooperativity with AP-1 mechanistically incomplete"]},{"year":2017,"claim":"Connecting AKR1B10 to ERK/MMP2 signaling and to keratinocyte retinoic-acid/TGF-β programs extended its functional reach into migration and paracrine fibrosis.","evidence":"Gain/loss of function with MEK inhibitor epistasis; RARE reporter and conditioned-medium transfer assays","pmids":["28402270","27025872"],"confidence":"Medium","gaps":["Direct ERK activation mechanism not defined","Retinoid depletion measured indirectly"]},{"year":2018,"claim":"Demonstrating AKR1B10-driven lipogenesis and DAG production activating PKC/ERK established a lipid-signaling mechanism for proliferation.","evidence":"LC-MS DAG lipidomics, PKC/ERK Western blots, Go6983/U0126/PD98059 epistasis, 3D culture and xenograft","pmids":["29846015"],"confidence":"High","gaps":["Reductase substrate driving lipogenesis not pinpointed","Which DAG species are causal not resolved"]},{"year":2018,"claim":"Identifying IRAK4/IRAK1/AP-1 as a transcriptional driver of AKR1B10 linked it to cancer stemness and provided a regulatory axis upstream of the enzyme.","evidence":"Transcriptome sequencing, IRAK1/AKR1B10 manipulation, AP-1 reporter, sphere/TIC assays, xenograft with IRAK inhibitor","pmids":["29483095"],"confidence":"Medium","gaps":["Direct AP-1 binding to AKR1B10 promoter not mapped here","Single cancer type"]},{"year":2019,"claim":"Showing AKR1B10 silencing reduces MMP-2/9 via MEK/ERK and blood-brain-barrier extravasation extended its metastatic role to brain colonization.","evidence":"siRNA in Transwell BBB, microfluidic chip, and in vivo brain metastasis models with MEK/ERK and MMP readouts","pmids":["31034948"],"confidence":"Medium","gaps":["Mechanistic link to ERK activation unresolved","Single lab/model panel"]},{"year":2021,"claim":"Demonstrating that AKR1B10 reductase activity restrains GAPDH nuclear translocation and autophagy under glucose starvation revealed a redox-dependent regulatory interaction.","evidence":"Co-IP, nuclear fractionation, activity-dead mutant, autophagy markers under glucose starvation","pmids":["33758077"],"confidence":"Medium","gaps":["Direct enzymatic modification of GAPDH not isolated","Reciprocal validation limited"]},{"year":2021,"claim":"Placing AKR1B10 upstream of PI3K/AKT/NF-κB and showing NF-κB-dependent cytokine induction connected its activity to proliferation, EMT, and inflammation.","evidence":"Overexpression/knockdown with LY294002 epistasis (breast cancer) and reductase-dead mutant cytokine assays (colon cancer)","pmids":["34419144","35920984"],"confidence":"Medium","gaps":["Direct activator of PI3K not identified","Reductase-to-signaling coupling mechanism incomplete"]},{"year":2021,"claim":"Identifying CBX7/PRC1, SMARCA4/IRAK1 enhancer control, and E2F1/AUF1 mRNA stabilization built a multilayered regulatory network governing AKR1B10 abundance.","evidence":"ChIP assays, luciferase/enhancer reporters, RNA-binding pulldown, mRNA stability and rescue epistasis; Ras-transgenic mouse","pmids":["34035231","34140644","35178834"],"confidence":"Medium","gaps":["Integration among these regulators not tested together","Cell-type specificity of each axis unclear"]},{"year":2021,"claim":"Identifying dasatinib as a direct AKR1B10 inhibitor that reverses daunorubicin resistance added a repurposable pharmacological tool against the enzyme.","evidence":"Recombinant enzyme inhibition (Ki=0.6 µM), cellular IC50, drug resistance assays","pmids":["34339712"],"confidence":"Medium","gaps":["Selectivity over other AKRs limited","In vivo efficacy untested"]},{"year":2022,"claim":"Demonstrating METTL3-mediated m6A modification stabilizing/enhancing AKR1B10 added an epitranscriptomic layer driving glycolysis and tumor growth.","evidence":"MeRIP-qPCR, METTL3 manipulation, AKR1B10 siRNA rescue, xenograft in cholangiocarcinoma","pmids":["36476503"],"confidence":"Medium","gaps":["m6A reader mediating the effect unidentified","Single tumor context"]},{"year":2022,"claim":"Showing AKR1B10 induces pro-inflammatory cytokines and transfers via extracellular vesicles broadened its non-cell-autonomous and inflammatory roles.","evidence":"Overexpression in macrophages/lung cells, LPS stimulation, cytokine ELISA, zopolrestat inhibition, EV transfer experiments","pmids":["35163833"],"confidence":"Medium","gaps":["EV cargo function in recipient cells not defined","Reductase dependence of cytokine induction not fully isolated here"]},{"year":2023,"claim":"Linking AKR1B10 to LDHA-driven glycolysis, histone lactylation, and CCNB1 transcription defined a metabolic-epigenetic route to chemoresistance.","evidence":"GC-MS metabolomics, RNA-seq, H4K12la/CCNB1 Western blots, siRNA, in vivo drug sensitivity","pmids":["37587486"],"confidence":"Medium","gaps":["Direct enzymatic step controlling LDHA not isolated","Generality beyond brain metastasis cells unclear"]},{"year":2023,"claim":"Identifying RNF152-mediated IRAK1 ubiquitination as an upstream regulator of AKR1B10 added a degradation-based control point over its expression and fatty acid oxidation.","evidence":"Co-IP, ubiquitination assay, IRAK1/AKR1B10 rescue, xenograft, FAO assay","pmids":["37717980"],"confidence":"Medium","gaps":["Direct RNF152-AKR1B10 link absent (acts via IRAK1)","Single cancer type"]},{"year":2024,"claim":"Direct target engagement by berberine and the AKT/NRF2/GPX4-dependent ferroptosis suppression established AKR1B10 as a druggable node in metabolic disease and cell-death regulation.","evidence":"Five orthogonal target-engagement methods (DARTS/CETSA/SPR/click/co-localization) with NAFLD genetic rescue; ferroptosis pathway epistasis in TNBC","pmids":["38762210","40613296"],"confidence":"High","gaps":["Direct substrate driving ferroptosis suppression unknown","In vivo ferroptosis modulation not shown"]},{"year":null,"claim":"How AKR1B10's catalytic reduction of specific carbonyl substrates is mechanistically coupled to the diverse downstream signaling cascades (ERK, PI3K/AKT/NF-κB, integrin, ferroptosis) remains unresolved.","evidence":"No study directly links a defined reduced product to activation of each signaling pathway","pmids":[],"confidence":"Low","gaps":["The causal metabolite connecting reductase activity to each pathway is unidentified","Whether secreted vs intracellular AKR1B10 mediates distinct effects is unknown"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0016491","term_label":"oxidoreductase activity","supporting_discovery_ids":[0,1,2,4,6]},{"term_id":"GO:0016209","term_label":"antioxidant activity","supporting_discovery_ids":[1,30]}],"localization":[{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[0,10]},{"term_id":"GO:0005764","term_label":"lysosome","supporting_discovery_ids":[10]},{"term_id":"GO:0005576","term_label":"extracellular region","supporting_discovery_ids":[10,26]}],"pathway":[{"term_id":"R-HSA-1430728","term_label":"Metabolism","supporting_discovery_ids":[2,4,17,28]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[8,11,17,20]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[6,12,27]},{"term_id":"R-HSA-9748784","term_label":"Drug ADME","supporting_discovery_ids":[0,6]}],"complexes":[],"partners":["HSP90AA1","GAPDH"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"O60218","full_name":"Aldo-keto reductase family 1 member B10","aliases":["ARL-1","Aldose reductase-like","Aldose reductase-related protein","ARP","hARP","Small intestine reductase","SI reductase"],"length_aa":316,"mass_kda":36.0,"function":"Catalyzes the NADPH-dependent reduction of a wide variety of carbonyl-containing compounds to their corresponding alcohols (PubMed:12732097, PubMed:18087047, PubMed:19013440, PubMed:19563777, PubMed:9565553). Displays strong enzymatic activity toward all-trans-retinal, 9-cis-retinal, and 13-cis-retinal (PubMed:12732097, PubMed:18087047). Plays a critical role in detoxifying dietary and lipid-derived unsaturated carbonyls, such as crotonaldehyde, 4-hydroxynonenal, trans-2-hexenal, trans-2,4-hexadienal and their glutathione-conjugates carbonyls (GS-carbonyls) (PubMed:19013440, PubMed:19563777). Displays no reductase activity towards glucose (PubMed:12732097)","subcellular_location":"Lysosome; Secreted","url":"https://www.uniprot.org/uniprotkb/O60218/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/AKR1B10","classification":"Not Classified","n_dependent_lines":1,"n_total_lines":1208,"dependency_fraction":0.0008278145695364238},"opencell":{"profiled":true,"resolved_as":"ARL1","ensg_id":"ENSG00000120805","cell_line_id":"CID000483","localizations":[{"compartment":"golgi","grade":3},{"compartment":"cytoplasmic","grade":1}],"interactors":[{"gene":"INPPL1","stoichiometry":0.2}],"url":"https://opencell.sf.czbiohub.org/target/CID000483","total_profiled":1310},"omim":[{"mim_id":"617744","title":"IMMUNODEFICIENCY, DEVELOPMENTAL DELAY, AND HYPOHOMOCYSTEINEMIA; IMDDHH","url":"https://www.omim.org/entry/617744"},{"mim_id":"616336","title":"ALDO-KETO REDUCTASE FAMILY 1, MEMBER B15; AKR1B15","url":"https://www.omim.org/entry/616336"},{"mim_id":"604707","title":"ALDO-KETO REDUCTASE FAMILY 1, MEMBER B10; AKR1B10","url":"https://www.omim.org/entry/604707"},{"mim_id":"600492","title":"NUCLEAR FACTOR ERYTHROID 2-LIKE 2; NFE2L2","url":"https://www.omim.org/entry/600492"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Cytosol","reliability":"Supported"},{"location":"Plasma membrane","reliability":"Additional"}],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"esophagus","ntpm":211.0},{"tissue":"intestine","ntpm":577.8},{"tissue":"stomach 1","ntpm":408.0}],"url":"https://www.proteinatlas.org/search/AKR1B10"},"hgnc":{"alias_symbol":["AKR1B12","ARL-1","HIS","ARL1","HSI","ALDRLn"],"prev_symbol":["AKR1B11"]},"alphafold":{"accession":"O60218","domains":[{"cath_id":"3.20.20.100","chopping":"12-305","consensus_level":"high","plddt":98.0061,"start":12,"end":305}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/O60218","model_url":"https://alphafold.ebi.ac.uk/files/AF-O60218-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-O60218-F1-predicted_aligned_error_v6.png","plddt_mean":97.75},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=AKR1B10","jax_strain_url":"https://www.jax.org/strain/search?query=AKR1B10"},"sequence":{"accession":"O60218","fasta_url":"https://rest.uniprot.org/uniprotkb/O60218.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/O60218/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/O60218"}},"corpus_meta":[{"pmid":"15755999","id":"PMC_15755999","title":"Overexpression 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The C299S mutant retains activity but is still inactivated by 4-ONE in the absence of NADPH, implicating Cys299 in NADPH-dependent protection.\",\n      \"method\": \"Recombinant enzyme kinetic assays; site-directed mutagenesis (C299S); NADPH protection experiment\",\n      \"journal\": \"Chemico-biological interactions\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — in vitro reconstitution with kinetic parameters, mutagenesis validation, and mechanistic protection assay in single rigorous study\",\n      \"pmids\": [\"19013440\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"AKR1B10 oxidizes a wide range of polycyclic aromatic hydrocarbon (PAH) trans-dihydrodiols to PAH o-quinones in vitro, though with stereospecificity for minor diastereomers. Retinal reductase activity of AKR1B10 is 5- to 150-fold greater than PAH trans-dihydrodiol oxidation, suggesting its predominant role in lung carcinogenesis is through dysregulation of retinoic acid homeostasis rather than PAH activation.\",\n      \"method\": \"In vitro enzymatic assay with recombinant AKR1B10; substrate panel oxidation measured; retinal reductase activity compared in A549 cell lysates\",\n      \"journal\": \"Chemical research in toxicology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro reconstitution with multiple substrates and direct catalytic efficiency comparison; single lab but rigorous biochemical quantitation\",\n      \"pmids\": [\"18788756\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"AKR1B10 catalyzes NADPH-dependent reduction of daunorubicin carbonyl groups (Km=1.1 mM, kcat=1.4 min⁻¹). The C299S mutation reduces substrate affinity for dl-glyceraldehyde (Km increases from 2.2 to 15.8 mM) but increases kcat, resulting in reduced overall catalytic efficiency; this mutation also alters inhibitor kinetics (sorbinil and EBPC no longer inhibit C299S mutant).\",\n      \"method\": \"In vitro kinetic assay with wild-type and C299S mutant recombinant AKR1B10; inhibitor kinetic analyses\",\n      \"journal\": \"Chemico-biological interactions\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — in vitro reconstitution with mutagenesis across multiple substrates and inhibitors; corroborated by independent study (PMID:18325492)\",\n      \"pmids\": [\"19028477\", \"18325492\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"AKR1B10 efficiently reduces long-chain aliphatic aldehydes including farnesal and geranylgeranial (from the mevalonate/prenylation pathway), oxidizes 20α-hydroxysteroids, and is inhibited by steroid hormones and bile acids (IC50 0.03–25 µM). Kinetic analyses and docking suggest inhibitory steroids and tolrestat bind overlapping sites within the active site of the enzyme-coenzyme complex, proposing a novel role for AKR1B10 in isoprenoid homeostasis.\",\n      \"method\": \"Recombinant AKR1B10 and AKR1B1 comparative kinetic assays; inhibition studies; molecular docking\",\n      \"journal\": \"Archives of biochemistry and biophysics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — comparative in vitro kinetics with multiple substrate classes, inhibition characterization, and structural modeling; published in dedicated mechanistic study\",\n      \"pmids\": [\"19464995\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Cigarette smoke extract upregulates AKR1B10 expression in airway epithelial cells in vitro, and transfection of AKR1B10 into airway epithelial cells enhances conversion of retinal to retinol, directly demonstrating AKR1B10's role in retinol/retinoic acid metabolism in airway cells.\",\n      \"method\": \"In vitro cigarette smoke extract treatment; AKR1B10 transfection with functional retinal-to-retinol conversion assay\",\n      \"journal\": \"Chest\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct functional overexpression assay with metabolic readout, single lab, two orthogonal approaches (CSE induction + transfection)\",\n      \"pmids\": [\"20705797\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"AKR1B10 reduces the C13-ketonic group on the side chain of daunorubicin and idarubicin to hydroxyl forms (daunorubicinol, idarubicinol), conferring cellular resistance. Kinetic parameters: daunorubicin Vmax=837 nmol/mg/min, Km=9.3 mM; idarubicin Vmax=460 nmol/mg/min, Km=0.46 mM (higher efficiency). AKR1B10 was less active toward doxorubicin and epirubicin (which have a C14-hydroxyl group). The AKR1B10 inhibitor epalrestat synergized with these drugs in cells.\",\n      \"method\": \"In vitro enzymatic assay with recombinant AKR1B10; HPLC quantitation in living cells; ectopic AKR1B10 expression with drug resistance assay; pharmacological inhibition with epalrestat\",\n      \"journal\": \"Toxicology and applied pharmacology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — in vitro reconstitution with rigorous kinetics, cellular functional assay with multiple substrates, and pharmacological validation; replicates prior biochemical findings\",\n      \"pmids\": [\"21640744\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Prostaglandin A1 (PGA1) covalently modifies AKR1B10 at Cys299, selectively among AKR family members. Mutation of Cys299 abolishes PGA1-biotin incorporation; mutation of His111 or Tyr49 reduces the interaction. Modification by PGA1 correlates with loss of AKR1B10 enzymatic activity. In lung cancer cells, PGA1 reduced tumorigenic potential and increased accumulation of the AKR1B10 substrate doxorubicin.\",\n      \"method\": \"Biotinylated PGA1 pulldown; site-directed mutagenesis (C299S, H111, Y49); enzymatic activity assay; molecular modeling; cell-based doxorubicin accumulation assay\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — covalent modification confirmed by mutagenesis of active site residues, loss-of-function enzymatic assay, and cellular functional validation with multiple orthogonal methods\",\n      \"pmids\": [\"21507934\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"siRNA-mediated silencing of AKR1B10 in pancreatic cancer cells increased non-farnesylated HDJ2 protein, decreased membrane-bound prenylated KRAS protein, and downregulated phosphorylated ERK, MEK, and membrane-bound E-cadherin, demonstrating that AKR1B10 promotes protein prenylation (farnesylation of KRAS) and downstream Ras/ERK signaling.\",\n      \"method\": \"siRNA knockdown; Western blot for prenylated KRAS, HDJ2, p-ERK, p-MEK; immunohistochemistry in pancreatic cancer specimens\",\n      \"journal\": \"Modern pathology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean siRNA knockdown with specific functional readouts (prenylation markers, downstream signaling), single lab, mechanistically coherent\",\n      \"pmids\": [\"22222635\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Crystal structures of AKR1B10 holoenzyme revealed that Trp112 adopts a native conformation stabilized by a Gln114-centered hydrogen bond network; AKR1B1 inhibitors can induce a Trp112 flip to create an 'AKR1B1-like' active site in AKR1B10, while selective AKR1B10 inhibitors exploit the broader active site provided by the native Trp112 orientation.\",\n      \"method\": \"X-ray crystallography of AKR1B10 holoenzyme with inhibitor complexes; structure-activity analysis\",\n      \"journal\": \"FEBS letters\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — crystal structure with functional SAR interpretation; structural basis for inhibitor selectivity directly demonstrated\",\n      \"pmids\": [\"24100137\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"HSP90α (heat shock protein 90α) physically associates with AKR1B10, translocates it to secretory lysosomes, and mediates its non-classical secretion. Ectopic HSP90α increased AKR1B10 secretion; the HSP90 inhibitor geldanamycin dissociated AKR1B10-HSP90α complexes and reduced secretion. Helix 10 (amino acids 233–240) of AKR1B10 mediates HSP90α binding, with Lys233, Glu236, and Lys240 identified as key residues by targeted point mutations.\",\n      \"method\": \"Co-immunoprecipitation; ectopic overexpression; geldanamycin inhibition; GFP-fusion protein secretion assay; site-directed mutagenesis of helix 10 residues\",\n      \"journal\": \"Journal of Biological Chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — reciprocal Co-IP, mutagenesis identifying specific binding residues, pharmacological inhibition, and functional secretion readout; multiple orthogonal methods in single study\",\n      \"pmids\": [\"24217247\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Sulindac competitively inhibits AKR1B10 activity in pancreatic cancer cells in a dose-dependent manner. siRNA silencing or sulindac treatment reduced KRAS and HDJ2 prenylation and downregulated phospho-c-Raf, ERK1/2, and MEK1/2. In LSL-KrasG12D-Trp53R172H-Pdx1-Cre mice, sulindac reduced pancreatic cancer incidence (90% to 56%) and increased survival, establishing AKR1B10 inhibition as sufficient to suppress KRAS prenylation and downstream Ras signaling in vivo.\",\n      \"method\": \"In vitro AKR1B10 activity assay with dose-response; siRNA knockdown; Western blot; transgenic mouse pancreatic cancer model with sulindac treatment\",\n      \"journal\": \"Carcinogenesis\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — in vitro biochemical inhibition assay, siRNA genetic validation, and in vivo transgenic mouse model all converge on same mechanism; multiple orthogonal methods\",\n      \"pmids\": [\"23689354\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"shRNA-mediated silencing of AKR1B10 in hepatocellular carcinoma cells increased cell apoptosis, decreased colony formation, and enhanced cytoreductive response to doxorubicin chemotherapy, establishing AKR1B10 as a functional contributor to HCC cell survival and chemoresistance.\",\n      \"method\": \"shRNA knockdown; colony formation assay; apoptosis assay; doxorubicin cytotoxicity assay\",\n      \"journal\": \"Human pathology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean shRNA knockdown with multiple functional readouts (apoptosis, proliferation, drug resistance), single lab\",\n      \"pmids\": [\"24656094\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"AKR1B10 overexpression in breast cancer cells MCF-7 and MDA-MB-231 upregulated integrin α5 and δ-catenin, activated FAK signaling, and stimulated Rac1-mediated cell migration. siRNA silencing of integrin α5 or δ-catenin eradicated AKR1B10-enhanced adhesion and migration, establishing that AKR1B10 promotes metastasis through the integrin α5/δ-catenin/FAK/Src/Rac1 pathway.\",\n      \"method\": \"Ectopic AKR1B10 expression; siRNA silencing of integrin α5 and δ-catenin; migration/invasion assays; Western blot for FAK/Src/Rac1 signaling; in vivo lung metastasis model in nude mice\",\n      \"journal\": \"Oncotarget\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — epistasis by double knockdown of pathway components, multiple cell lines, in vivo validation, and correlation in human tumor specimens\",\n      \"pmids\": [\"27248472\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"AKR1B10 overexpression in breast cancer cells MCF-7 activated ERK1/2 signaling and upregulated MMP2 and vimentin expression, promoting cell migration and invasion. The MEK inhibitor PD98059 blocked AKR1B10-induced migration and MMP2/vimentin expression, placing AKR1B10 upstream of the ERK/MMP2 axis.\",\n      \"method\": \"Ectopic AKR1B10 expression and siRNA silencing; wound healing, transwell migration, and matrigel invasion assays; Western blot for p-ERK, MMP2, vimentin; MEK inhibitor epistasis\",\n      \"journal\": \"Oncotarget\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — gain and loss of function with pharmacological epistasis in two cell lines; single lab\",\n      \"pmids\": [\"28402270\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"AKR1B10 transfection into normal human keratinocytes reproduced an abnormal retinoic acid pathway expression pattern found in keloid epidermis. Co-transfection with a luciferase reporter showed reduced retinoic acid response element (RARE) activity, indicating that AKR1B10 overexpression causes retinoic acid synthesis deficiency. Conditioned medium from AKR1B10-overexpressing keratinocytes upregulated TGF-β1, TGF-β2, and collagens I and III in fibroblasts.\",\n      \"method\": \"Transfection-based RARE luciferase reporter assay; conditioned medium transfer experiment; Western blot/qPCR for TGF-β and collagen\",\n      \"journal\": \"Journal of Investigative Dermatology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — luciferase reporter assay and paracrine functional assay, single lab, mechanistically coherent with known AKR1B10 retinal reductase activity\",\n      \"pmids\": [\"27025872\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"IRAK1 transcriptionally upregulates AKR1B10 expression in hepatocellular carcinoma via the AP-1 complex. Knockdown of AKR1B10 negated IRAK1-induced tumor-initiating cell functions. IRAK4/IRAK1/AP-1/AKR1B10 constitutes an epistatic signaling cascade regulating cancer stemness and drug resistance.\",\n      \"method\": \"Transcriptome sequencing; knockdown/overexpression of IRAK1 and AKR1B10; AP-1 reporter assay; sphere and TIC assays; xenograft model with IRAK1/4 inhibitor\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — epistasis established by rescue experiment (AKR1B10 KD negates IRAK1 phenotype), multiple functional assays, single lab\",\n      \"pmids\": [\"29483095\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"AKR1B10 ectopic expression in breast cancer cells MCF-7 promoted lipogenesis and elevated lipid second messengers PIP2, DAG, and IP3. AKR1B10 regulated total DAG and most DAG subspecies levels (confirmed by LC-MS), leading to activation of PKC isoforms (PKCδ, PKCµ, PKCα/βII) and the PKC/c-Raf/MEK/ERK cascade. A pan-PKC inhibitor (Go6983) blocked AKR1B10-induced ERK1/2 activation, establishing the DAG→PKC→ERK pathway as AKR1B10's mechanism for promoting proliferation.\",\n      \"method\": \"Ectopic AKR1B10 expression and siRNA silencing; LC-MS lipidomics for DAG species; Western blot for PKC phosphorylation and ERK signaling; pharmacological inhibition (Go6983, U0126, PD98059); 3D culture and xenograft\",\n      \"journal\": \"Molecular carcinogenesis\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — LC-MS lipidomics, multiple pharmacological epistasis experiments, gain and loss of function, and in vivo validation; multiple orthogonal methods in single rigorous study\",\n      \"pmids\": [\"29846015\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"AKR1B10 silencing in brain-metastatic lung cancer cells suppressed MMP-2 and MMP-9 expression via the MEK/ERK signaling pathway, reducing extravasation through the blood-brain barrier in Transwell, microfluidic chip, and in vivo models.\",\n      \"method\": \"siRNA silencing; Transwell BBB model; multi-organ microfluidic chip; in vivo brain metastasis nude mouse model; Western blot for MMP-2/9 and MEK/ERK\",\n      \"journal\": \"Acta biomaterialia\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — loss-of-function in three complementary models (in vitro, ex vivo chip, in vivo) with defined signaling readouts; single lab\",\n      \"pmids\": [\"31034948\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"AKR1B10 interacts with and inhibits the nuclear translocation of GAPDH in colon cancer cells. This interaction is associated with an NADPH-dependent reduction reaction between AKR1B10 and GAPDH. AKR1B10 reductase activity is required for repression of autophagy under glucose starvation.\",\n      \"method\": \"Co-immunoprecipitation; knockdown and overexpression; nuclear fractionation; enzymatic activity-dead mutant studies; autophagy markers\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2–3 / Moderate — Co-IP identifies GAPDH as binding partner, enzymatic activity required for functional effect demonstrated by mutant, single lab\",\n      \"pmids\": [\"33758077\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"AKR1B10 overexpression in breast cancer cells activates PI3K, AKT, and NF-κB p65, induces nuclear translocation of NF-κB p65, and increases proliferation-related (c-myc, cyclinD1, Survivin) and EMT-related (ZEB1, SLUG, Twist) proteins. The PI3K inhibitor LY294002 attenuated these effects, placing AKR1B10 upstream of the PI3K/AKT/NF-κB cascade.\",\n      \"method\": \"AKR1B10 overexpression and shRNA knockdown; Western blot for PI3K/AKT/NF-κB pathway; LY294002 pharmacological epistasis; nuclear fractionation; xenograft model\",\n      \"journal\": \"Cell & bioscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — gain and loss of function with pharmacological epistasis, single lab; pathway placement supported by inhibitor rescue\",\n      \"pmids\": [\"34419144\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"CBX7 directly represses AKR1B10 transcription in a PRC1-dependent manner in urinary bladder cancer cells, as determined by ChIP assay. AKR1B10 overexpression reversed CBX7-suppressed ERK signaling, and AKR1B10 siRNA or oleanolic acid inhibitor reversed CBX7 deficiency-induced aggressiveness, establishing CBX7→AKR1B10→ERK as an epigenetic regulatory axis.\",\n      \"method\": \"RNA-seq; ChIP assay; siRNA and overexpression; ERK signaling Western blot; pharmacological AKR1B10 inhibition; xenograft\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP confirms direct epigenetic regulation, epistasis by double manipulation; single lab\",\n      \"pmids\": [\"34035231\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"AKR1B10 promotes NF-κB-dependent expression of pro-inflammatory cytokines IL-1α and IL-6 in colon cancer cells stimulated by LPS; this effect depends on AKR1B10's reductase activity, as a reductase-dead mutant fails to activate NF-κB signaling.\",\n      \"method\": \"siRNA knockdown; AKR1B10 overexpression; reductase-dead mutant; Western blot and ELISA for IL-1α, IL-6, NF-κB pathway components; LPS stimulation model\",\n      \"journal\": \"Journal of molecular histology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reductase-dead mutant mechanistically links enzymatic activity to NF-κB activation; single lab, two orthogonal methods\",\n      \"pmids\": [\"35920984\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"SMARCA4 activates AKR1B10 expression in liver cancer cells through an IRAK1 enhancer, as demonstrated by ChIP-qPCR and luciferase assays showing SMARCA4 binding to the IRAK1 active enhancer. IRAK1 transcriptional activation then induces AKR1B10 expression, establishing the SMARCA4→IRAK1 enhancer→IRAK1→AKR1B10 axis in hepatocarcinogenesis.\",\n      \"method\": \"ChIP-qPCR; luciferase reporter assay; siRNA and overexpression; in vivo Ras-transgenic mouse model\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP and luciferase assays directly demonstrate enhancer occupancy and transcriptional activation; validated in vivo; single lab\",\n      \"pmids\": [\"34140644\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"AUF1 binds the 3'UTR of AKR1B10 mRNA and stabilizes it, increasing AKR1B10 protein expression. This post-transcriptional mechanism mediates AUF1-induced HCC cell proliferation and doxorubicin resistance; AKR1B10 knockdown negated AUF1's pro-tumor effects. E2F1 transcriptionally drives AUF1 expression, establishing an E2F1/AUF1/AKR1B10 regulatory axis.\",\n      \"method\": \"RNA-binding pulldown; 3'UTR binding assay; siRNA rescue experiments; mRNA stability assay; E2F1 transcription factor reporter and ChIP\",\n      \"journal\": \"Cancer science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — 3'UTR-binding and mRNA stabilization functionally validated by rescue epistasis; single lab; multiple orthogonal methods\",\n      \"pmids\": [\"35178834\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"METTL3 methyltransferase directly binds and adds m6A modification to AKR1B10 mRNA, enhancing AKR1B10 expression in cholangiocarcinoma. MeRIP-qPCR confirmed AKR1B10 m6A modification. AKR1B10 knockdown rescued the tumor-promoting effects of METTL3 overexpression, including proliferation, migration, invasion, glycolysis, and lactate production.\",\n      \"method\": \"RNA-seq; MeRIP-qPCR; METTL3 overexpression/knockdown; siRNA rescue (AKR1B10); xenograft; tissue microarray\",\n      \"journal\": \"Cancer cell international\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — m6A modification confirmed by MeRIP-qPCR at specific site, epistasis rescue validates pathway position; single lab\",\n      \"pmids\": [\"36476503\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"AKR1B10 overexpression in macrophages and lung cells induces pro-inflammatory cytokines IL-6, IL-1β, and TNFα. The AKR1B10 inhibitor zopolrestat significantly reduces LPS-induced production of these cytokines. AKR1B10 can be secreted and transferred via extracellular vesicles between different cell types.\",\n      \"method\": \"AKR1B10 overexpression in macrophages/lung cells; LPS stimulation; cytokine ELISA; pharmacological inhibition with zopolrestat; extracellular vesicle isolation and transfer experiments\",\n      \"journal\": \"International journal of molecular sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — gain-of-function plus pharmacological epistasis in cell models; extracellular vesicle transfer demonstrated; single lab\",\n      \"pmids\": [\"35163833\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"In dasatinib inhibition studies, AKR1B10 was identified as a direct target with Ki=0.6 µM (recombinant enzyme) and IC50=0.5 µM (cellular). Dasatinib selectively inhibited AKR1B10-mediated daunorubicin reduction, attenuating daunorubicin resistance in AKR1B10-overexpressing cancer cells.\",\n      \"method\": \"Recombinant enzyme inhibition assay; IC50 determination in AKR1B10-overexpressing cells; drug resistance assay with daunorubicin\",\n      \"journal\": \"Biochemical pharmacology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — in vitro enzymatic assay plus cellular model; single lab; dasatinib identified as AKR1B10 inhibitor with defined kinetics\",\n      \"pmids\": [\"34339712\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"AKR1B10 promotes glycolysis by regulating LDHA expression and increasing lactate production in lung cancer brain metastasis cells. Elevated lactate acts as a precursor for histone lactylation (H4K12la), which activates CCNB1 transcription and accelerates DNA replication and cell cycle progression, establishing the AKR1B10/glycolysis/H4K12la/CCNB1 axis as a mechanism of pemetrexed resistance.\",\n      \"method\": \"GC-MS metabolomics; RNA-seq; Western blot for LDHA, H4K12la, CCNB1; siRNA knockdown; in vitro and in vivo drug sensitivity assays\",\n      \"journal\": \"Journal of translational medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multi-omic approach (metabolomics + transcriptomics) with mechanistic validation by Western blot; single lab; pathway epistasis coherent\",\n      \"pmids\": [\"37587486\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"Berberine directly binds AKR1B10 protein (validated by click chemistry proteomics, DARTS, CETSA, SPR, and fluorescence co-localization). Berberine decreased AKR1B10 expression and activity. AKR1B10 knockdown recapitulated berberine's effects on lipid/glucose metabolism (ACC1, CPT-1, GLUT2) and PPAR signaling in NAFLD models; these effects were abolished when AKR1B10 was knocked down, confirming AKR1B10 as the direct target.\",\n      \"method\": \"Click chemistry proteomics; DARTS; CETSA; SPR; fluorescence co-localization; shRNA/siRNA knockdown; RNA-seq; NAFLD mouse model\",\n      \"journal\": \"Journal of ethnopharmacology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — five orthogonal target engagement methods (DARTS, CETSA, SPR, click chemistry, fluorescence co-localization) in a single study; genetic rescue confirms target\",\n      \"pmids\": [\"38762210\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"AKR1B10 suppresses ferroptosis in triple-negative breast cancer MDA-MB-231 cells by activating the AKT(Ser473)/GSK3β(Ser9)/NRF2/GPX4 pathway. AKR1B10 overexpression increased GPX4, FTH1, HO-1, and NQO-1 expression; the AKT inhibitor OSU-T315 reversed AKR1B10-suppressed ferroptosis. The ferroptosis inhibitor ferrostatin-1 rescued cell death, confirming the ferroptosis mechanism.\",\n      \"method\": \"Stable lentiviral overexpression and knockdown; RSL3-induced ferroptosis model; C11-BODIPY lipid ROS flow cytometry; Western blot for AKT/GSK3β/NRF2/GPX4; pharmacological inhibition (OSU-T315, ferrostatin-1); RNA-seq; KEGG/GSEA pathway analysis\",\n      \"journal\": \"Frontiers in bioscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — pathway epistasis via pharmacological inhibition with rescue; multiple signaling readouts; single lab, multiple orthogonal methods\",\n      \"pmids\": [\"40613296\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"The functional antioxidant response element (ARE) for AKR1B10 transcription was mapped to the region between -530 and -520 bp (ARE-A) from the translation start site using luciferase reporter deletion and mutation analyses. ARE-A functions cooperatively with an adjacent AP-1 site for augmented Nrf2-mediated gene regulation.\",\n      \"method\": \"Luciferase reporter assays with ARE deletion and point mutants; Nrf2 activation studies\",\n      \"journal\": \"Chemico-biological interactions\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — luciferase reporter with systematic mutagenesis of multiple AREs; single lab; direct mapping of functional promoter element\",\n      \"pmids\": [\"28219640\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"Site-directed mutagenesis of AKR1B10 active site residues Phe123, Trp220, Val301, and Gln303 reduced tight binding of γ-mangostin (competitive inhibitor, Ki=5.6 nM), establishing these residues as important for inhibitor binding in the substrate-binding site.\",\n      \"method\": \"Site-directed mutagenesis; recombinant enzyme inhibition kinetics; molecular docking\",\n      \"journal\": \"Biological & pharmaceutical bulletin\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro mutagenesis with kinetic validation; single lab; identifies specific active site residues\",\n      \"pmids\": [\"23123477\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"RNF152 ubiquitinates IRAK1 (demonstrated by co-IP and ubiquitination assay), reducing IRAK1 stability in lung adenocarcinoma cells. This decreases IRAK1-mediated AKR1B10 expression, suppressing fatty acid oxidation and the malignant phenotype. Ectopic IRAK1 restored AKR1B10 expression in RNF152-overexpressing cells, establishing RNF152/IRAK1 ubiquitination as an upstream regulator of AKR1B10.\",\n      \"method\": \"Co-IP; ubiquitination assay; IRAK1 and AKR1B10 overexpression rescue; xenograft model; fatty acid oxidation assay\",\n      \"journal\": \"American journal of pathology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP and rescue epistasis establish pathway position; single lab; consistent with established IRAK1→AKR1B10 axis\",\n      \"pmids\": [\"37717980\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"AKR1B10 is a cytosolic NADPH-dependent reductase that catalyzes reduction of diverse carbonyl substrates (retinals, isoprenoid aldehydes farnesal/geranylgeranial, lipid peroxidation products 4-HNE/4-ONE, toxic xenobiotics, and anthracycline drugs) and oxidation of aliphatic alcohols; it promotes protein prenylation (KRAS farnesylation) and downstream Ras/ERK signaling, activates DAG-mediated PKC/ERK and PI3K/AKT/NF-κB cascades to drive proliferation and metastasis, and confers drug resistance by inactivating anthracyclines; its secretion is mediated by HSP90α binding to helix 10 via lysosomes; its transcription is governed by a functional ARE-A/AP-1 element under Nrf2 control and is regulated upstream by the SMARCA4/IRAK1 and E2F1/AUF1 axes, while its mRNA is stabilized by AUF1 and m6A-modified by METTL3; Cys299 is a critical active-site residue targeted by cyclopentenone prostaglandins and is protected from inactivation by NADPH.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"AKR1B10 is a cytosolic NADPH-dependent aldo-keto reductase that detoxifies and metabolizes a broad panel of carbonyl substrates, positioning it at the interface of lipid, retinoid, isoprenoid, and xenobiotic metabolism and cancer cell signaling [#0, #1, #4]. Biochemically, the enzyme reduces reactive lipid peroxidation aldehydes (4-HNE, 4-ONE), long-chain isoprenoid aldehydes (farnesal, geranylgeranial), retinals, and xenobiotic and anthracycline carbonyls, while also oxidizing aliphatic alcohols and certain hydroxysteroids [#0, #1, #2, #4]. Cys299 is a critical active-site residue that, together with His111 and Tyr49, governs catalysis and is the covalent target of cyclopentenone prostaglandins; NADPH binding protects the enzyme from carbonyl-mediated inactivation at this residue [#1, #7]. Crystallographic analysis shows the native Trp112 orientation defines a broad active site exploited by selective inhibitors [#9]. Through its reductase activity AKR1B10 supports protein prenylation, sustaining KRAS farnesylation and downstream Raf/MEK/ERK signaling, and its inhibition suppresses KRAS prenylation and tumorigenesis in vivo [#8, #11]. In cancer cells it drives proliferation, migration, and metastasis by elevating lipid second messengers that activate PKC/ERK, by engaging integrin \\u03b15/\\u03b4-catenin/FAK/Rac1 and ERK/MMP axes, and by activating PI3K/AKT/NF-\\u03baB signaling [#13, #14, #17, #20]. It also reprograms metabolism\\u2014promoting glycolysis and histone lactylation\\u2014and confers anthracycline and other chemoresistance by reducing drug carbonyls, an activity blocked by inhibitors such as epalrestat and dasatinib [#6, #12, #27, #28]. Its reductase activity additionally restrains GAPDH nuclear translocation and autophagy, suppresses ferroptosis via the AKT/NRF2/GPX4 axis, and shapes retinoic-acid-dependent transcription and paracrine TGF-\\u03b2/collagen programs [#19, #30, #15]. AKR1B10 is secreted non-classically through HSP90\\u03b1 binding to its helix 10 and lysosomal routing [#10]. Its expression is controlled by an Nrf2-responsive ARE-A/AP-1 promoter element and by upstream SMARCA4/IRAK1 and CBX7/PRC1 transcriptional regulators, post-transcriptionally stabilized by AUF1 and m6A-modified by METTL3 [#31, #23, #21, #24, #25].\",\n  \"teleology\": [\n    {\n      \"year\": 2005,\n      \"claim\": \"Establishing AKR1B10 as a genuine NADPH-dependent carbonyl reductase required isolating the native enzyme and demonstrating catalysis on defined substrates, which this work delivered for xenobiotics and a carcinogen.\",\n      \"evidence\": \"Native protein purification from human liver cytosol with HPLC kinetic assays on dolasetron, daunorubicin, oracin, and NNK\",\n      \"pmids\": [\"16381663\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Physiological substrate hierarchy not established\", \"No structural basis for substrate selectivity\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Defining AKR1B10's role in detoxifying reactive carbonyls and identifying Cys299 as a redox-sensitive residue clarified both a protective function and a regulatory vulnerability of the enzyme.\",\n      \"evidence\": \"Recombinant kinetics on 4-HNE/4-ONE/4-methylpentanal, C299S mutagenesis, and NADPH protection assays\",\n      \"pmids\": [\"19013440\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"In vivo relevance of 4-HNE detoxification not tested\", \"Mechanism of NADPH protection at Cys299 not fully resolved\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Comparing retinal reductase versus PAH dihydrodiol oxidation activities resolved which catalytic role dominates, pointing to retinoic acid homeostasis dysregulation over carcinogen activation.\",\n      \"evidence\": \"In vitro substrate panel oxidation and catalytic efficiency comparison in A549 lysates\",\n      \"pmids\": [\"18788756\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Cellular retinoid flux not directly quantified here\", \"PAH-quinone biological consequences untested\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Identifying farnesal and geranylgeranial as efficient substrates connected AKR1B10 to isoprenoid/prenylation metabolism, suggesting a role beyond xenobiotic detoxification.\",\n      \"evidence\": \"Comparative AKR1B10/AKR1B1 kinetics, steroid/bile-acid inhibition, and docking\",\n      \"pmids\": [\"19464995\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct link to cellular prenylation not yet shown at this stage\", \"Physiological inhibitor concentrations unclear\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Mapping covalent PGA1 modification to Cys299 with loss of enzymatic activity established a chemical handle for inactivating AKR1B10 and confirmed active-site residues.\",\n      \"evidence\": \"Biotinylated-PGA1 pulldown, C299S/H111/Y49 mutagenesis, activity assays, cellular doxorubicin accumulation\",\n      \"pmids\": [\"21507934\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Endogenous prostaglandin regulation of AKR1B10 not demonstrated\", \"Therapeutic exploitation untested in vivo\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Demonstrating reduction of anthracycline C13-ketones to inactive alcohols mechanistically explained AKR1B10-mediated drug resistance and its reversal by inhibition.\",\n      \"evidence\": \"Recombinant kinetics, cellular HPLC quantitation, drug resistance assays with epalrestat synergy\",\n      \"pmids\": [\"21640744\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Clinical relevance in patients not addressed\", \"Substrate specificity vs doxorubicin only partly explained\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Crystal structures of the holoenzyme provided the structural basis for inhibitor selectivity by defining the native Trp112 conformation and its flip in AKR1B1-like states.\",\n      \"evidence\": \"X-ray crystallography of AKR1B10 holoenzyme with inhibitor complexes and SAR analysis\",\n      \"pmids\": [\"24100137\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"No substrate-bound complex resolved\", \"Conformational dynamics in solution untested\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Linking AKR1B10 to KRAS prenylation and Ras/ERK signaling, and showing inhibition suppresses pancreatic tumorigenesis in vivo, converted a biochemical activity into an oncogenic mechanism.\",\n      \"evidence\": \"siRNA knockdown with prenylation/signaling Western blots; sulindac inhibition in a KrasG12D-Trp53 transgenic mouse model\",\n      \"pmids\": [\"22222635\", \"23689354\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct reduction of a prenylation precursor in cells not biochemically isolated\", \"Sulindac off-target effects not excluded\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Identifying HSP90\\u03b1 binding to helix 10 and lysosomal routing explained how a cytosolic enzyme is secreted, expanding its potential extracellular and biomarker roles.\",\n      \"evidence\": \"Reciprocal Co-IP, geldanamycin dissociation, GFP-fusion secretion assay, helix-10 point mutagenesis\",\n      \"pmids\": [\"24217247\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Function of secreted AKR1B10 not defined here\", \"Trigger for secretion in physiological contexts unknown\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"shRNA silencing showing increased apoptosis and chemosensitivity in hepatocellular carcinoma established AKR1B10 as a functional survival factor, not merely a marker.\",\n      \"evidence\": \"shRNA knockdown with colony formation, apoptosis, and doxorubicin cytotoxicity assays\",\n      \"pmids\": [\"24656094\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular mediator of survival not identified\", \"Single cell-type context\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Defining the integrin \\u03b15/\\u03b4-catenin/FAK/Rac1 pathway gave AKR1B10 a concrete pro-metastatic signaling mechanism validated by epistasis.\",\n      \"evidence\": \"Ectopic expression, double siRNA of integrin \\u03b15/\\u03b4-catenin, migration assays, lung metastasis model\",\n      \"pmids\": [\"27248472\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How reductase activity links to integrin upregulation unresolved\", \"Direct molecular intermediates absent\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Mapping the ARE-A/AP-1 promoter element placed AKR1B10 under Nrf2-driven antioxidant transcriptional control, explaining its induction by oxidative/xenobiotic stress.\",\n      \"evidence\": \"Luciferase reporter deletion/mutation analysis with Nrf2 activation\",\n      \"pmids\": [\"28219640\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Endogenous Nrf2 occupancy not shown by ChIP here\", \"Cooperativity with AP-1 mechanistically incomplete\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Connecting AKR1B10 to ERK/MMP2 signaling and to keratinocyte retinoic-acid/TGF-\\u03b2 programs extended its functional reach into migration and paracrine fibrosis.\",\n      \"evidence\": \"Gain/loss of function with MEK inhibitor epistasis; RARE reporter and conditioned-medium transfer assays\",\n      \"pmids\": [\"28402270\", \"27025872\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct ERK activation mechanism not defined\", \"Retinoid depletion measured indirectly\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Demonstrating AKR1B10-driven lipogenesis and DAG production activating PKC/ERK established a lipid-signaling mechanism for proliferation.\",\n      \"evidence\": \"LC-MS DAG lipidomics, PKC/ERK Western blots, Go6983/U0126/PD98059 epistasis, 3D culture and xenograft\",\n      \"pmids\": [\"29846015\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Reductase substrate driving lipogenesis not pinpointed\", \"Which DAG species are causal not resolved\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Identifying IRAK4/IRAK1/AP-1 as a transcriptional driver of AKR1B10 linked it to cancer stemness and provided a regulatory axis upstream of the enzyme.\",\n      \"evidence\": \"Transcriptome sequencing, IRAK1/AKR1B10 manipulation, AP-1 reporter, sphere/TIC assays, xenograft with IRAK inhibitor\",\n      \"pmids\": [\"29483095\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct AP-1 binding to AKR1B10 promoter not mapped here\", \"Single cancer type\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Showing AKR1B10 silencing reduces MMP-2/9 via MEK/ERK and blood-brain-barrier extravasation extended its metastatic role to brain colonization.\",\n      \"evidence\": \"siRNA in Transwell BBB, microfluidic chip, and in vivo brain metastasis models with MEK/ERK and MMP readouts\",\n      \"pmids\": [\"31034948\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanistic link to ERK activation unresolved\", \"Single lab/model panel\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Demonstrating that AKR1B10 reductase activity restrains GAPDH nuclear translocation and autophagy under glucose starvation revealed a redox-dependent regulatory interaction.\",\n      \"evidence\": \"Co-IP, nuclear fractionation, activity-dead mutant, autophagy markers under glucose starvation\",\n      \"pmids\": [\"33758077\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct enzymatic modification of GAPDH not isolated\", \"Reciprocal validation limited\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Placing AKR1B10 upstream of PI3K/AKT/NF-\\u03baB and showing NF-\\u03baB-dependent cytokine induction connected its activity to proliferation, EMT, and inflammation.\",\n      \"evidence\": \"Overexpression/knockdown with LY294002 epistasis (breast cancer) and reductase-dead mutant cytokine assays (colon cancer)\",\n      \"pmids\": [\"34419144\", \"35920984\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct activator of PI3K not identified\", \"Reductase-to-signaling coupling mechanism incomplete\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Identifying CBX7/PRC1, SMARCA4/IRAK1 enhancer control, and E2F1/AUF1 mRNA stabilization built a multilayered regulatory network governing AKR1B10 abundance.\",\n      \"evidence\": \"ChIP assays, luciferase/enhancer reporters, RNA-binding pulldown, mRNA stability and rescue epistasis; Ras-transgenic mouse\",\n      \"pmids\": [\"34035231\", \"34140644\", \"35178834\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Integration among these regulators not tested together\", \"Cell-type specificity of each axis unclear\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Identifying dasatinib as a direct AKR1B10 inhibitor that reverses daunorubicin resistance added a repurposable pharmacological tool against the enzyme.\",\n      \"evidence\": \"Recombinant enzyme inhibition (Ki=0.6 \\u00b5M), cellular IC50, drug resistance assays\",\n      \"pmids\": [\"34339712\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Selectivity over other AKRs limited\", \"In vivo efficacy untested\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Demonstrating METTL3-mediated m6A modification stabilizing/enhancing AKR1B10 added an epitranscriptomic layer driving glycolysis and tumor growth.\",\n      \"evidence\": \"MeRIP-qPCR, METTL3 manipulation, AKR1B10 siRNA rescue, xenograft in cholangiocarcinoma\",\n      \"pmids\": [\"36476503\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"m6A reader mediating the effect unidentified\", \"Single tumor context\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Showing AKR1B10 induces pro-inflammatory cytokines and transfers via extracellular vesicles broadened its non-cell-autonomous and inflammatory roles.\",\n      \"evidence\": \"Overexpression in macrophages/lung cells, LPS stimulation, cytokine ELISA, zopolrestat inhibition, EV transfer experiments\",\n      \"pmids\": [\"35163833\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"EV cargo function in recipient cells not defined\", \"Reductase dependence of cytokine induction not fully isolated here\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Linking AKR1B10 to LDHA-driven glycolysis, histone lactylation, and CCNB1 transcription defined a metabolic-epigenetic route to chemoresistance.\",\n      \"evidence\": \"GC-MS metabolomics, RNA-seq, H4K12la/CCNB1 Western blots, siRNA, in vivo drug sensitivity\",\n      \"pmids\": [\"37587486\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct enzymatic step controlling LDHA not isolated\", \"Generality beyond brain metastasis cells unclear\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Identifying RNF152-mediated IRAK1 ubiquitination as an upstream regulator of AKR1B10 added a degradation-based control point over its expression and fatty acid oxidation.\",\n      \"evidence\": \"Co-IP, ubiquitination assay, IRAK1/AKR1B10 rescue, xenograft, FAO assay\",\n      \"pmids\": [\"37717980\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct RNF152-AKR1B10 link absent (acts via IRAK1)\", \"Single cancer type\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Direct target engagement by berberine and the AKT/NRF2/GPX4-dependent ferroptosis suppression established AKR1B10 as a druggable node in metabolic disease and cell-death regulation.\",\n      \"evidence\": \"Five orthogonal target-engagement methods (DARTS/CETSA/SPR/click/co-localization) with NAFLD genetic rescue; ferroptosis pathway epistasis in TNBC\",\n      \"pmids\": [\"38762210\", \"40613296\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct substrate driving ferroptosis suppression unknown\", \"In vivo ferroptosis modulation not shown\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How AKR1B10's catalytic reduction of specific carbonyl substrates is mechanistically coupled to the diverse downstream signaling cascades (ERK, PI3K/AKT/NF-\\u03baB, integrin, ferroptosis) remains unresolved.\",\n      \"evidence\": \"No study directly links a defined reduced product to activation of each signaling pathway\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"The causal metabolite connecting reductase activity to each pathway is unidentified\", \"Whether secreted vs intracellular AKR1B10 mediates distinct effects is unknown\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0016491\", \"supporting_discovery_ids\": [0, 1, 2, 4, 6]},\n      {\"term_id\": \"GO:0016209\", \"supporting_discovery_ids\": [1, 30]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [0, 10]},\n      {\"term_id\": \"GO:0005764\", \"supporting_discovery_ids\": [10]},\n      {\"term_id\": \"GO:0005576\", \"supporting_discovery_ids\": [10, 26]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-1430728\", \"supporting_discovery_ids\": [2, 4, 17, 28]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [8, 11, 17, 20]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [6, 12, 27]},\n      {\"term_id\": \"R-HSA-9748784\", \"supporting_discovery_ids\": [0, 6]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"HSP90AA1\", \"GAPDH\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"tie","faith_supported":10,"faith_total":10,"faith_pct":100.0}}