{"gene":"LOXL1","run_date":"2026-04-28T18:30:27","timeline":{"discoveries":[{"year":2004,"finding":"LOXL1 (LOXL) protein is expressed as an extracellular enzyme that deaminates peptidyl lysyl residues, functioning in cross-linking of fibrillar collagens and elastin, and is localized to both extracellular matrix and nuclei of cells in multiple tissues; its expression pattern differs from LOX in kidney, stomach, intestine, retina, ovary, testis, and brain, and it is highly expressed during embryonic development and diminishes with aging.","method":"Immunohistochemistry and comparative immunolocalization in mouse tissues across developmental stages","journal":"Journal of molecular histology","confidence":"Medium","confidence_rationale":"Tier 3 — single lab, single method (IHC), but comprehensive developmental and tissue survey with direct localization findings","pmids":["15609098"],"is_preprint":false},{"year":1999,"finding":"LOXL1 (LOXL) mRNA is co-induced with type III procollagen mRNA early in carbon tetrachloride-induced liver fibrosis, suggesting LOXL1 participates in lysine-derived cross-link formation in collagenous substrates with potentially different substrate specificity from LOX (which parallels type I collagen).","method":"Real-time RT-PCR and Northern blotting in mouse liver fibrosis model","journal":"Journal of cellular biochemistry","confidence":"Medium","confidence_rationale":"Tier 3 — single lab, expression-based in disease model with mechanistic inference; no direct enzymatic assay","pmids":["10022501"],"is_preprint":false},{"year":2012,"finding":"All four haplotype variants of LOXL1 (R141L and G153D combinations) exhibit beta-aminopropionitrile (BAPN)-inhibitable amine oxidase activity toward elastin, type I collagen, and cadaverine; the disease-associated coding variants R141L and G153D in the NH2-terminal region do not significantly affect amine oxidase catalytic activity.","method":"Recombinant protein expression, nickel-affinity purification, and peroxidase-coupled fluorometric amine oxidase assay with BAPN inhibition","journal":"Molecular vision","confidence":"High","confidence_rationale":"Tier 1 — in vitro enzymatic assay with purified recombinant variants and specific inhibitor controls","pmids":["22328822"],"is_preprint":false},{"year":2016,"finding":"LOXL1 coding variants R141L and G153D are likely surface-exposed residues; the amino acid substitutions alter local protein electrostatic potential and modify protein-protein interactions, specifically affecting processing of secreted LOXL1 by endogenous proteases (possibly BMP-1, which cleaves LOXL1 for enzymatic activation), as detected by immunoprecipitation of secreted variant proteins in RFL-6 cells.","method":"Molecular modelling, ectopic expression in RFL-6 rat fetal lung fibroblasts, immunoprecipitation of secreted proteins, immunofluorescence","journal":"Experimental eye research","confidence":"Medium","confidence_rationale":"Tier 2/3 — single lab, immunoprecipitation with functional inference; BMP-1 as processor is proposed but not directly confirmed","pmids":["26997634"],"is_preprint":false},{"year":2014,"finding":"LOXL1 knockout mice develop disruption of the blood-aqueous barrier in the ocular anterior segment, lens abnormalities (anterior subcapsular vesiculation), and decreased elastin in the iris and ciliary body, demonstrating that LOXL1 is required for elastic fiber maintenance in ocular tissues.","method":"Loxl1 null mouse phenotyping: anterior segment histology, fluorescein angiography, immunohistochemistry for elastin","journal":"Investigative ophthalmology & visual science","confidence":"High","confidence_rationale":"Tier 2 — clean KO with defined ocular phenotype, multiple orthogonal readouts (histology, angiography, IHC)","pmids":["24425853"],"is_preprint":false},{"year":2008,"finding":"Mice deficient in LOXL1 develop pelvic organ prolapse with a global connective tissue defect; LOXL1(-/-) vaginal and supportive tissues show a 31% decrease in ultimate load at failure compared to wild-type, demonstrating that LOXL1 is required for normal biomechanical properties of pelvic floor connective tissues.","method":"Loxl1 null mouse biomechanical testing to failure of vagina and supportive tissue complex","journal":"International urogynecology journal and pelvic floor dysfunction","confidence":"High","confidence_rationale":"Tier 2 — clean KO with quantitative biomechanical phenotype, consistent with known enzymatic function in elastin crosslinking","pmids":["18265927"],"is_preprint":false},{"year":2018,"finding":"LOXL1 is the specific LOX family member responsible for elastin crosslinking in liver cirrhosis; LOXL1 co-localizes with alpha-SMA in cirrhotic liver and is absent in normal and fibrotic (non-cirrhotic) liver; AAV-shRNA-mediated LOXL1 knockdown in CCl4-induced cirrhosis mice reduces insoluble elastin by 58% and collagen area by 51%, arresting disease progression.","method":"CCl4 mouse fibrosis/cirrhosis model, immunohistochemistry, AAV2/8 shRNA knockdown, quantitative elastin/collagen analysis","journal":"Biochimica et biophysica acta. Molecular basis of disease","confidence":"High","confidence_rationale":"Tier 2 — clean in vivo KD with multiple orthogonal quantitative readouts, replicated in cell culture","pmids":["29366776"],"is_preprint":false},{"year":2018,"finding":"LOXL1 knockdown in TGF-β1-stimulated hepatic stellate cells (LX-2) suppresses proliferation and fibrogenesis by reducing phosphorylation of Smad2 and Smad3; Smad2/3 double knockdown abolishes both TGF-β1- and LOXL1 overexpression-mediated fibrogenic effects, placing LOXL1 upstream of the Smad2/3 pathway in hepatic stellate cell activation.","method":"siRNA knockdown and overexpression in LX-2 cells, Western blot for pSmad2/3, proliferation assay, genetic epistasis (double knockdown)","journal":"Biomedicine & pharmacotherapy","confidence":"Medium","confidence_rationale":"Tier 2 — epistasis with double knockdown and orthogonal readouts, single lab","pmids":["30257391"],"is_preprint":false},{"year":2021,"finding":"Hepatic stellate cell-specific LOXL1 knockout prevents CCl4-induced liver fibrosis and NASH-associated inflammation; RNA sequencing identifies integrin α8 (ITGA8) as a key upstream modulator of LOXL1; siRNA silencing of ITGA8 reduces LOXL1 expression; HIF1α directly binds the LOXL1 promoter and upregulates its expression; LOXL1 activates FAK/PI3K/AKT/HIF1α signaling, forming a positive feedback loop.","method":"HSC-specific Loxl1fl/fl Gfap-cre knockout mice, CCl4/CDAA diet models, RNA sequencing, ChIP (HIF1α-LOXL1 promoter), siRNA epistasis, FAK/PI3K inhibitor experiments","journal":"FASEB journal","confidence":"High","confidence_rationale":"Tier 2 — conditional KO with RNA-seq, ChIP, and pharmacological epistasis; multiple orthogonal methods in a single study","pmids":["34569648"],"is_preprint":false},{"year":2021,"finding":"HSC-specific LOXL1 deficiency (Loxl1fl/fl Gfapcre) in CDAA diet-induced non-obese NASH mice ameliorates hepatic steatosis, inflammation, and fibrosis, and restores adipose tissue function, indicating LOXL1 in HSCs contributes to both ECM crosslinking and systemic metabolic dysregulation in non-obese NAFLD.","method":"Conditional HSC-specific Loxl1 knockout mice on CDAA diet, liver histology, pro-fibrogenic/inflammatory gene expression, serum LOXL1 correlation with fibrosis in human NAFLD biopsies","journal":"Hepatology international","confidence":"High","confidence_rationale":"Tier 2 — conditional KO with multiple phenotypic readouts and human validation","pmids":["34014450"],"is_preprint":false},{"year":2009,"finding":"LOXL1 protein is directly identified as a component of surgically isolated pseudoexfoliation (PEX) material from anterior lens capsules by mass spectrometry, confirmed by immunohistochemistry, establishing that LOXL1 protein is physically incorporated into pathological PEX deposits.","method":"Direct mass spectrometry of isolated PEX material, immunohistochemistry confirmation","journal":"Experimental eye research","confidence":"High","confidence_rationale":"Tier 1/2 — direct proteomics identification replicated by IHC, robust analytical approach","pmids":["19442659"],"is_preprint":false},{"year":2017,"finding":"A noncoding rs11638944:C>G transversion in introns 1-2 of LOXL1, in a region with enhancer-like chromatin features, mediates cis-acting reduction in LOXL1 mRNA levels through differential binding of transcription factor RXRα and by modulating alternative splicing of LOXL1 exons, leading to reduced LOXL1 mRNA in risk allele carrier cells and tissues.","method":"GWAS, luciferase reporter assays, RXRα binding (EMSA/ChIP), alternative splicing analysis by RT-PCR, allele-specific expression in patient tissues","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal molecular methods (GWAS, reporter, binding assay, splicing, patient tissue expression) in a single rigorous study","pmids":["28534485"],"is_preprint":false},{"year":2011,"finding":"TGF-β1, oxidative stress, UV light, and hypoxia induce significant upregulation of LOXL1 expression and elastic fiber proteins in human Tenon's capsule fibroblasts, with assembly into extracellular microfibrillar networks and PEX-like fibrils, demonstrating that these pathogenic stimuli regulate LOXL1-mediated elastic fiber formation.","method":"Cultured human fibroblast stimulation, real-time PCR, Western blotting, immunohistochemistry, electron microscopy","journal":"Investigative ophthalmology & visual science","confidence":"Medium","confidence_rationale":"Tier 2 — multiple orthogonal methods in a single lab; electron microscopy shows fibril assembly consequence","pmids":["21948647"],"is_preprint":false},{"year":2020,"finding":"LOXL1 inhibits the transcriptional activity of YAP in colorectal cancer by physically interacting with MST1/2 kinases and increasing their phosphorylation, thereby activating the Hippo pathway and functioning as a tumor suppressor.","method":"Co-immunoprecipitation, kinase phosphorylation assay, colony formation, wound healing, migration/invasion assays, in vivo xenograft and metastasis models","journal":"Cell communication and signaling","confidence":"Medium","confidence_rationale":"Tier 2 — Co-IP establishes interaction; phosphorylation assay supports mechanism; single lab","pmids":["32912229"],"is_preprint":false},{"year":2020,"finding":"LOXL1 interacts with the antiapoptotic protein BAG2 through a hydrogen bond between LOXL1-D515 and BAG2-K186; LOXL1's lysyl oxidase enzymatic activity prevents BAG2 degradation by competing with K186 ubiquitylation, thereby stabilizing BAG2 and conferring antiapoptotic activity in glioma cells; LOXL1 expression is specifically upregulated via the VEGFR-Src-CEBPA transcriptional axis.","method":"Co-immunoprecipitation, molecular docking/hydrogen bond analysis, ubiquitylation competition assay, gain/loss-of-function in cells and animals, VEGFR-Src-CEBPA pathway analysis","journal":"Cell death and differentiation","confidence":"Medium","confidence_rationale":"Tier 2 — reciprocal Co-IP, ubiquitylation competition assay, and pathway epistasis in single study; single lab","pmids":["32424143"],"is_preprint":false},{"year":2021,"finding":"LOXL1 promotes angiogenesis in intrahepatic cholangiocarcinoma by interacting with fibulin 5 (FBLN5), which binds αvβ3 integrin in an RGD domain-dependent manner, activating the FAK-MAPK signaling pathway in vascular endothelial cells.","method":"Co-immunoprecipitation (LOXL1-FBLN5 interaction), αvβ3 integrin binding assays, FAK-MAPK pathway Western blotting, overexpression/knockdown in RBE and 9810 cells, in vivo angiogenesis models","journal":"Molecular therapy. Nucleic acids","confidence":"Medium","confidence_rationale":"Tier 2 — Co-IP establishes LOXL1-FBLN5 interaction; downstream pathway validated; single lab","pmids":["33614230"],"is_preprint":false},{"year":2021,"finding":"LOXL1 promotes tumor growth and invasion in invasive lobular carcinoma (ILC) by remodeling extracellular matrix; pan-LOX inhibitor BAPN and LOXL1-specific silencing decrease tumor growth, invasion, and metastasis by disrupting ECM structure, resulting in decreased estrogen receptor (ER) signaling.","method":"Intraductal xenograft models, BAPN pharmacological inhibition, shRNA knockdown, ECM structural analysis, ER signaling readouts","journal":"EMBO molecular medicine","confidence":"High","confidence_rationale":"Tier 2 — pharmacological and genetic inhibition in validated xenograft model with multiple readouts and mechanistic link to ER signaling","pmids":["33616307"],"is_preprint":false},{"year":2019,"finding":"LOXL1 expression in non-small cell lung cancer (NSCLC) stroma is regulated by integrin α11 in cancer-associated fibroblasts; LOXL1 in turn mediates collagen matrix remodeling and collagen fiber alignment, supporting tumor growth and progression in a NSCLC xenograft model.","method":"Integrin α11 KD/OE, LOXL1 KD/OE in cancer-associated fibroblasts, collagen matrix assays, in vivo NSCLC xenograft model, correlation analysis in patient datasets","journal":"Cancers","confidence":"Medium","confidence_rationale":"Tier 2 — genetic epistasis (integrin α11 regulates LOXL1), functional in vivo consequence; single lab","pmids":["31121900"],"is_preprint":false},{"year":2020,"finding":"LOXL1-AS1 lncRNA localizes to the nucleus where it selectively binds to the mRNA processing protein hnRNPL; both components regulate global gene expression in ocular cells relevant to pseudoexfoliation glaucoma pathogenesis.","method":"RNA-FISH (nuclear localization), RNA immunoprecipitation (RIP), pulldown assays identifying hnRNPL as LOXL1-AS1 binding partner, functional gene expression analysis","journal":"Human molecular genetics","confidence":"Medium","confidence_rationale":"Tier 2 — direct RIP and pulldown identify binding partner; nuclear localization confirmed by imaging; single lab","pmids":["32037441"],"is_preprint":false},{"year":2015,"finding":"Risk alleles in the region upstream of the LOXL1-AS1 lncRNA (located at the 3'-end of exon 1 and adjacent intron 1 of LOXL1) are functional variants that significantly modulate LOXL1-AS1 promoter activity; LOXL1-AS1 expression is altered by oxidative stress in human lens epithelial cells and by cyclic mechanical stress in Schlemm's canal endothelial cells, implicating this lncRNA in cellular stress response relevant to pseudoexfoliation syndrome.","method":"Deep sequencing of LOXL1 locus, luciferase promoter reporter assays, multi-population replication, cell stress experiments with qRT-PCR","journal":"Human molecular genetics","confidence":"Medium","confidence_rationale":"Tier 2 — reporter assays confirm functional variants; stress response replicated across cell types; multi-population validation","pmids":["26307087"],"is_preprint":false},{"year":2019,"finding":"The LOXL1 N-terminus (first ~369 aa) constitutes an intrinsically disordered region (IDR) with maximum disorder at amino acid position 153 (the G153D risk variant site); overexpression of LOXL1 or fluorescent chimeras preserving the intact N-terminus causes copious intracellular protein aggregation in XFG patient-derived fibroblasts; in XFG cells, a substantial fraction of LOXL1 is processed for autophagic degradation.","method":"In silico disorder prediction, overexpression with fluorescent tags, aggregation assays, autophagy flux assays in XFG patient-derived fibroblasts","journal":"Advances in protein chemistry and structural biology","confidence":"Medium","confidence_rationale":"Tier 3 — computational prediction supported by cell-based aggregation and autophagy assays; single lab, no structural validation","pmids":["31928728"],"is_preprint":false},{"year":2019,"finding":"The protective variant rs7173049-G at the LOXL1 locus lies in an enhancer-like region that regulates ISLR2 and STRA6 expression via allele-specific binding of thyroid hormone receptor beta; siRNA-mediated downregulation of retinoic acid (RA) signaling induces upregulation of LOXL1 and PEX-associated matrix genes, linking RA signaling via STRA6 to regulation of LOXL1 expression in PEX-relevant cell types.","method":"LOXL1 deep sequencing across 9 ethnic populations, luciferase enhancer assays, allele-specific transcription factor binding (thyroid hormone receptor beta EMSA/ChIP), siRNA knockdown of RA signaling components, tissue expression analysis","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal methods (reporter, TF binding, siRNA epistasis, tissue expression) in multi-population study","pmids":["30986821"],"is_preprint":false},{"year":2021,"finding":"Loxl1-deficient mice develop pelvic organ prolapse with disorganized collagen and elastic fibers in pelvic tissues, urinary dysfunction, decreased pelvic floor tissue mechanical properties, and upregulation of ECM catabolism and inflammatory response genes, consistent with pathological features in human POP patients.","method":"Loxl1 knockout mice, histology of collagen/elastic fibers, urodynamics, mechanical testing, GO/transcriptome analysis, comparison to human prolapse tissue","journal":"Aging","confidence":"Medium","confidence_rationale":"Tier 2 — multiple phenotypic readouts in KO model validated against human tissue; single lab","pmids":["34923484"],"is_preprint":false},{"year":2017,"finding":"Platelet-rich plasma (PRP) induces post-natal maturation of immature articular cartilage with a 10-fold upregulation of LOXL1 gene expression correlating with a 5-fold increase in cartilage stiffness as measured by atomic force microscopy, identifying LOXL1 as a mediator of PRP-induced cartilage stiffening.","method":"In vitro PRP treatment of immature cartilage explants, gene expression analysis, atomic force microscopy for stiffness, BrdU incorporation for proliferation","journal":"Scientific reports","confidence":"Medium","confidence_rationale":"Tier 3 — single lab, correlation between LOXL1 expression and biomechanical outcome; direct mechanistic link not fully established","pmids":["28623328"],"is_preprint":false}],"current_model":"LOXL1 is an extracellular copper-dependent amine oxidase that cross-links elastin and fibrillar collagens through deamination of peptidyl lysyl residues, and is required for elastic fiber formation and stabilization in multiple tissues; it also functions intracellularly to stabilize the antiapoptotic protein BAG2 by competing with its ubiquitylation, and signals through the FAK/PI3K/AKT/HIF1α axis in hepatic stellate cells, while its expression is regulated by TGF-β1, oxidative stress, RXRα-dependent and alternative splicing-dependent mechanisms at the LOXL1 locus, with loss of function causing defective elastin crosslinking, impaired connective tissue biomechanics, and features of pseudoexfoliation syndrome and pelvic organ prolapse in mice."},"narrative":{"teleology":[{"year":1999,"claim":"Identifying LOXL1 as co-regulated with type III procollagen during liver fibrosis established it as a cross-linking enzyme with potentially distinct substrate preference from LOX.","evidence":"RT-PCR and Northern blot in CCl4-treated mouse liver fibrosis model","pmids":["10022501"],"confidence":"Medium","gaps":["No direct enzymatic assay on type III collagen substrate","Substrate specificity versus LOX inferred from co-expression, not biochemistry"]},{"year":2004,"claim":"Comprehensive tissue and developmental mapping revealed LOXL1 as an extracellular and nuclear enzyme with distinct spatial expression from LOX, broadening its potential functional contexts beyond ECM crosslinking.","evidence":"Immunohistochemistry across multiple mouse tissues and developmental stages","pmids":["15609098"],"confidence":"Medium","gaps":["Nuclear localization function unexplained","Single method (IHC) without biochemical confirmation of nuclear activity"]},{"year":2008,"claim":"Loxl1 knockout mice developing pelvic organ prolapse with quantifiable biomechanical failure demonstrated that LOXL1 is non-redundant for connective tissue structural integrity in vivo.","evidence":"Biomechanical testing to failure of vaginal/supportive tissue complex in Loxl1-null mice","pmids":["18265927"],"confidence":"High","gaps":["Relative contribution of elastin versus collagen crosslinking defects not separated","No rescue experiment performed"]},{"year":2009,"claim":"Direct identification of LOXL1 protein within pseudoexfoliation deposits linked the enzyme physically to PEX disease pathology, not just genetically.","evidence":"Mass spectrometry of surgically isolated PEX material from anterior lens capsules, confirmed by IHC","pmids":["19442659"],"confidence":"High","gaps":["Whether LOXL1 in PEX deposits is enzymatically active or aggregated unclear","Causative versus bystander role in deposit formation not resolved"]},{"year":2012,"claim":"Demonstrating that all four R141L/G153D haplotype variants retain full BAPN-inhibitable amine oxidase activity showed that PEX-associated coding variants do not impair catalysis, redirecting attention to non-catalytic mechanisms of disease.","evidence":"Recombinant protein purification and peroxidase-coupled fluorometric amine oxidase assay with BAPN inhibition","pmids":["22328822"],"confidence":"High","gaps":["Substrate range tested limited to elastin, type I collagen, cadaverine","Processing and secretion effects of variants not assessed in this study"]},{"year":2014,"claim":"Loxl1-null mice developing disrupted blood-aqueous barrier and decreased ocular elastin established LOXL1 as essential for elastic fiber maintenance in the anterior segment, directly relevant to PEX pathogenesis.","evidence":"Loxl1 knockout mouse phenotyping with histology, fluorescein angiography, and elastin IHC","pmids":["24425853"],"confidence":"High","gaps":["No rescue with exogenous LOXL1 attempted","Mechanism linking elastin loss to barrier disruption not defined"]},{"year":2015,"claim":"Identification of functional risk variants in the LOXL1-AS1 promoter region that respond to oxidative and mechanical stress established a regulatory lncRNA layer at the LOXL1 locus relevant to PEX pathogenesis.","evidence":"Deep sequencing, luciferase promoter reporters, cell stress experiments in lens epithelial and Schlemm's canal endothelial cells","pmids":["26307087"],"confidence":"Medium","gaps":["LOXL1-AS1 mechanism of action on LOXL1 protein expression not defined","Whether lncRNA regulates LOXL1 in cis or trans unclear"]},{"year":2016,"claim":"Showing that R141L/G153D variants alter LOXL1 proteolytic processing rather than catalysis provided a mechanistic explanation for how coding variants cause disease without affecting enzyme activity.","evidence":"Molecular modelling and immunoprecipitation of secreted variant proteins in RFL-6 fibroblasts","pmids":["26997634"],"confidence":"Medium","gaps":["BMP-1 as the responsible protease proposed but not directly confirmed","Processing differences not quantitated with purified protease"]},{"year":2017,"claim":"Discovery that the intronic rs11638944 variant reduces LOXL1 mRNA through RXRα-dependent transcription and alternative splicing established a cis-regulatory mechanism for disease-associated LOXL1 downregulation.","evidence":"GWAS, luciferase reporters, RXRα EMSA/ChIP, splicing analysis, allele-specific expression in patient tissues","pmids":["28534485"],"confidence":"High","gaps":["Whether RXRα binding is necessary or sufficient for expression change not separated from splicing effects","Downstream functional consequence of specific splice variants not characterized"]},{"year":2018,"claim":"Identifying LOXL1 as the specific LOX family member driving elastin crosslinking in liver cirrhosis — absent in normal/fibrotic liver but co-localizing with activated HSCs in cirrhosis — separated its cirrhotic role from other family members and showed therapeutic knockdown arrests disease progression.","evidence":"CCl4 mouse cirrhosis model with AAV-shRNA LOXL1 knockdown, quantitative elastin/collagen analysis, IHC","pmids":["29366776"],"confidence":"High","gaps":["Whether LOXL1 knockdown reverses established cirrhosis versus prevents progression not tested","Substrate specificity in cirrhotic ECM not defined biochemically"]},{"year":2018,"claim":"Placing LOXL1 upstream of Smad2/3 phosphorylation in TGF-β1-stimulated hepatic stellate cells revealed a signaling role beyond its extracellular catalytic function.","evidence":"siRNA knockdown, overexpression, Smad2/3 double knockdown epistasis in LX-2 cells","pmids":["30257391"],"confidence":"Medium","gaps":["Whether LOXL1 activates Smad2/3 through enzymatic activity or protein-protein interaction not resolved","Mechanism of Smad2/3 phosphorylation induction unknown"]},{"year":2019,"claim":"Demonstrating that the LOXL1 N-terminus is an intrinsically disordered region prone to intracellular aggregation in XFG patient fibroblasts, with autophagic clearance, provided a proteostasis-based disease mechanism complementing the crosslinking deficiency model.","evidence":"In silico disorder prediction, overexpression aggregation assays, autophagy flux assays in XFG patient-derived fibroblasts","pmids":["31928728"],"confidence":"Medium","gaps":["No structural validation of disorder by NMR or SAXS","Aggregation propensity of endogenous versus overexpressed protein not compared","Whether aggregation is pathogenic or protective unclear"]},{"year":2019,"claim":"Linking a protective LOXL1-locus variant to retinoic acid signaling via STRA6 regulation identified a systemic signaling axis — thyroid hormone receptor β and RA pathway — converging on LOXL1 expression control.","evidence":"Multi-population deep sequencing, enhancer reporters, THRβ EMSA/ChIP, siRNA knockdown of RA signaling","pmids":["30986821"],"confidence":"High","gaps":["Whether RA-mediated LOXL1 regulation is direct or indirect not fully resolved","Therapeutic potential of RA modulation not tested in disease model"]},{"year":2020,"claim":"Discovery that LOXL1 stabilizes BAG2 by competing with ubiquitylation at K186 revealed a non-canonical intracellular function — regulation of protein turnover — independent of its canonical oxidase activity, with antiapoptotic consequences in glioma.","evidence":"Reciprocal Co-IP, molecular docking, ubiquitylation competition assay, gain/loss-of-function in glioma cells and xenografts","pmids":["32424143"],"confidence":"Medium","gaps":["Whether LOXL1 enzymatic activity is required for BAG2 stabilization not tested with catalytic-dead mutant","Generalizability beyond glioma unknown"]},{"year":2020,"claim":"Identification of LOXL1 as a Hippo pathway activator through physical interaction with MST1/2 kinases established a tumor-suppressive signaling function in colorectal cancer distinct from its ECM role.","evidence":"Co-IP of LOXL1-MST1/2, kinase phosphorylation assay, xenograft and metastasis models in CRC cells","pmids":["32912229"],"confidence":"Medium","gaps":["Whether MST1/2 interaction requires LOXL1 catalytic domain not determined","Single cancer type; generalizability unclear"]},{"year":2021,"claim":"Hepatic stellate cell-specific Loxl1 conditional knockout preventing fibrosis and NASH, combined with identification of the ITGA8→LOXL1→FAK/PI3K/AKT/HIF1α positive feedback loop, defined the cell-autonomous and signaling circuit through which LOXL1 drives liver disease.","evidence":"HSC-specific Loxl1 conditional KO, CCl4/CDAA models, RNA-seq, HIF1α ChIP on LOXL1 promoter, pharmacological inhibitors","pmids":["34569648","34014450"],"confidence":"High","gaps":["Whether the FAK/PI3K/AKT/HIF1α loop operates in non-hepatic tissues not tested","Direct ITGA8-LOXL1 interaction mechanism not defined"]},{"year":null,"claim":"Key unresolved questions include the structural basis of LOXL1 N-terminal disorder and aggregation, the mechanism by which LOXL1 activates intracellular kinases (MST1/2, Smad2/3, FAK) independently of its oxidase activity, and whether the distinct extracellular (crosslinking) and intracellular (BAG2 stabilization, Hippo activation) functions are coupled or context-specific.","evidence":"","pmids":[],"confidence":"Low","gaps":["No crystal or cryo-EM structure available","Catalytic-dead mutant not systematically tested across signaling and stabilization functions","Relative contribution of enzymatic versus non-enzymatic functions in disease models not separated"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0016491","term_label":"oxidoreductase activity","supporting_discovery_ids":[2,6]},{"term_id":"GO:0140096","term_label":"catalytic activity, acting on a protein","supporting_discovery_ids":[14]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[13,14]}],"localization":[{"term_id":"GO:0031012","term_label":"extracellular matrix","supporting_discovery_ids":[0,10,12]},{"term_id":"GO:0005576","term_label":"extracellular region","supporting_discovery_ids":[0,2,10]},{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[0]}],"pathway":[{"term_id":"R-HSA-1474244","term_label":"Extracellular matrix organization","supporting_discovery_ids":[2,5,6,16,17]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[7,8,13,15]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[6,8,9]}],"complexes":[],"partners":["BAG2","FBLN5","MST1","MST2","ITGA8","HIF1A","RXRA"],"other_free_text":[]},"mechanistic_narrative":"LOXL1 is an extracellular copper-dependent amine oxidase that catalyzes oxidative deamination of peptidyl lysine residues in elastin and fibrillar collagens, driving covalent cross-link formation essential for elastic fiber assembly and connective tissue mechanical integrity. All tested coding variants retain BAPN-inhibitable amine oxidase activity toward elastin, type I collagen, and cadaverine, though disease-associated variants R141L and G153D alter surface electrostatics and proteolytic processing rather than catalytic function [PMID:22328822, PMID:26997634]. Loxl1 knockout mice develop pelvic organ prolapse with globally weakened connective tissues, disrupted ocular anterior segment barriers with decreased elastin, and resistance to CCl4-induced liver cirrhosis when deleted specifically in hepatic stellate cells, where LOXL1 activates a FAK/PI3K/AKT/HIF1α positive feedback loop and signals through Smad2/3 [PMID:18265927, PMID:24425853, PMID:34569648, PMID:30257391]. Beyond its extracellular catalytic role, LOXL1 stabilizes the antiapoptotic protein BAG2 by competing with ubiquitylation at K186, confers antiapoptotic activity in glioma, and activates the Hippo pathway by phosphorylating MST1/2 kinases in colorectal cancer cells [PMID:32424143, PMID:32912229]."},"prefetch_data":{"uniprot":{"accession":"Q08397","full_name":"Lysyl oxidase homolog 1","aliases":["Lysyl oxidase-like protein 1","LOL"],"length_aa":574,"mass_kda":63.1,"function":"Catalyzes the oxidative deamination of lysine and hydroxylysine residues in collagen and elastin, resulting in the formation of covalent cross-linkages, and the stabilization of collagen and elastin fibers (By similarity). 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cancer","url":"https://pubmed.ncbi.nlm.nih.gov/30720865","citation_count":22,"is_preprint":false},{"pmid":"3203966","id":"PMC_3203966","title":"Isolation and characterization of Poa p I allergens of Kentucky bluegrass pollen with a murine monoclonal anti-Lol p I antibody.","date":"1988","source":"International archives of allergy and applied immunology","url":"https://pubmed.ncbi.nlm.nih.gov/3203966","citation_count":22,"is_preprint":false},{"pmid":"34890108","id":"PMC_34890108","title":"LOXL1-AS1 communicating with TIAR modulates vasculogenic mimicry in glioma via regulation of the miR-374b-5p/MMP14 axis.","date":"2021","source":"Journal of cellular and molecular medicine","url":"https://pubmed.ncbi.nlm.nih.gov/34890108","citation_count":22,"is_preprint":false},{"pmid":"33545201","id":"PMC_33545201","title":"MiR-15b and miR-16 suppress TGF-β1-induced proliferation and fibrogenesis by regulating LOXL1 in hepatic stellate cells.","date":"2021","source":"Life sciences","url":"https://pubmed.ncbi.nlm.nih.gov/33545201","citation_count":21,"is_preprint":false},{"pmid":"30986821","id":"PMC_30986821","title":"The protective variant rs7173049 at LOXL1 locus impacts on retinoic acid signaling pathway in pseudoexfoliation syndrome.","date":"2019","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/30986821","citation_count":21,"is_preprint":false},{"pmid":"21738402","id":"PMC_21738402","title":"Evaluation of LOXL1 polymorphisms in exfoliation syndrome in the Uygur population.","date":"2011","source":"Molecular vision","url":"https://pubmed.ncbi.nlm.nih.gov/21738402","citation_count":21,"is_preprint":false},{"pmid":"34267816","id":"PMC_34267816","title":"lncRNA LOXL1-AS1 promotes liver cancer cell proliferation and migration by regulating the miR-377-3p/NFIB axis.","date":"2021","source":"Oncology letters","url":"https://pubmed.ncbi.nlm.nih.gov/34267816","citation_count":20,"is_preprint":false},{"pmid":"19664108","id":"PMC_19664108","title":"From epidemiology to lysyl oxidase like one (LOXL1) polymorphisms discovery: phenotyping and genotyping exfoliation syndrome and exfoliation glaucoma in Iceland.","date":"2009","source":"Acta ophthalmologica","url":"https://pubmed.ncbi.nlm.nih.gov/19664108","citation_count":20,"is_preprint":false},{"pmid":"28623328","id":"PMC_28623328","title":"Platelet-rich plasma induces post-natal maturation of immature articular cartilage and correlates with LOXL1 activation.","date":"2017","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/28623328","citation_count":20,"is_preprint":false},{"pmid":"26011922","id":"PMC_26011922","title":"Screening of lysyl oxidase (LOX) and lysyl oxidase like (LOXL) enzyme expression and activity in preterm prelabor rupture of fetal membranes.","date":"2016","source":"Journal of perinatal medicine","url":"https://pubmed.ncbi.nlm.nih.gov/26011922","citation_count":20,"is_preprint":false},{"pmid":"2496037","id":"PMC_2496037","title":"Molecular genetics of human immune responsiveness to Lolium perenne (rye) allergen, Lol p III.","date":"1989","source":"International archives of allergy and applied immunology","url":"https://pubmed.ncbi.nlm.nih.gov/2496037","citation_count":19,"is_preprint":false},{"pmid":"25275910","id":"PMC_25275910","title":"Expression and regulation of LOXL1 and elastin-related genes in eyes with exfoliation syndrome.","date":"2014","source":"Journal of glaucoma","url":"https://pubmed.ncbi.nlm.nih.gov/25275910","citation_count":19,"is_preprint":false},{"pmid":"7522159","id":"PMC_7522159","title":"Mapping of T cell epitopes of the major fraction of rye grass using peripheral blood mononuclear cells from atopics and non-atopics. II. Isoallergen clone 5A of Lolium perenne group I (Lol p I).","date":"1994","source":"European journal of immunology","url":"https://pubmed.ncbi.nlm.nih.gov/7522159","citation_count":18,"is_preprint":false},{"pmid":"28008161","id":"PMC_28008161","title":"Baicalein Inhibits Epithelial to Mesenchymal Transition via Downregulation of Cyr61 and LOXL-2 in MDA-MB231 Breast Cancer Cells.","date":"2016","source":"Molecules and cells","url":"https://pubmed.ncbi.nlm.nih.gov/28008161","citation_count":18,"is_preprint":false},{"pmid":"8765826","id":"PMC_8765826","title":"Identification of T-cell epitopes of Lol p 9, a major allergen of ryegrass (Lolium perenne) pollen.","date":"1996","source":"The Journal of allergy and clinical immunology","url":"https://pubmed.ncbi.nlm.nih.gov/8765826","citation_count":18,"is_preprint":false},{"pmid":"31928728","id":"PMC_31928728","title":"LOXL1 folding in exfoliation glaucoma.","date":"2019","source":"Advances in protein chemistry and structural biology","url":"https://pubmed.ncbi.nlm.nih.gov/31928728","citation_count":18,"is_preprint":false},{"pmid":"33095806","id":"PMC_33095806","title":"Potential association of LOXL1 with peritoneal dissemination in gastric cancer possibly via promotion of EMT.","date":"2020","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/33095806","citation_count":18,"is_preprint":false},{"pmid":"32037441","id":"PMC_32037441","title":"Identification and activity of the functional complex between hnRNPL and the pseudoexfoliation syndrome-associated lncRNA, LOXL1-AS1.","date":"2020","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/32037441","citation_count":18,"is_preprint":false},{"pmid":"1526648","id":"PMC_1526648","title":"Recombinant pollen allergens from Dactylis glomerata: preliminary evidence that human IgE cross-reactivity between Dac g II and Lol p I/II is increased following grass pollen immunotherapy.","date":"1992","source":"Immunology","url":"https://pubmed.ncbi.nlm.nih.gov/1526648","citation_count":18,"is_preprint":false},{"pmid":"33907842","id":"PMC_33907842","title":"LOXL1‑AS1 promotes thymoma and thymic carcinoma progression by regulating miR‑525‑5p‑HSPA9.","date":"2021","source":"Oncology reports","url":"https://pubmed.ncbi.nlm.nih.gov/33907842","citation_count":17,"is_preprint":false},{"pmid":"7691451","id":"PMC_7691451","title":"T cell epitopes of the major fraction of rye grass Lolium perenne (Lol p I) defined using overlapping peptides in vitro and in vivo. I. Isoallergen clone1A.","date":"1993","source":"Clinical and experimental immunology","url":"https://pubmed.ncbi.nlm.nih.gov/7691451","citation_count":17,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":54975,"output_tokens":6048,"usd":0.127823},"stage2":{"model":"claude-opus-4-6","input_tokens":9677,"output_tokens":3739,"usd":0.21279},"total_usd":0.340613,"stage1_batch_id":"msgbatch_01Mgbec4vM6c9vXht7JVJzss","stage2_batch_id":"msgbatch_01JkuuH5RB2BdJNsgnhjbC6s","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2004,\n      \"finding\": \"LOXL1 (LOXL) protein is expressed as an extracellular enzyme that deaminates peptidyl lysyl residues, functioning in cross-linking of fibrillar collagens and elastin, and is localized to both extracellular matrix and nuclei of cells in multiple tissues; its expression pattern differs from LOX in kidney, stomach, intestine, retina, ovary, testis, and brain, and it is highly expressed during embryonic development and diminishes with aging.\",\n      \"method\": \"Immunohistochemistry and comparative immunolocalization in mouse tissues across developmental stages\",\n      \"journal\": \"Journal of molecular histology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — single lab, single method (IHC), but comprehensive developmental and tissue survey with direct localization findings\",\n      \"pmids\": [\"15609098\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"LOXL1 (LOXL) mRNA is co-induced with type III procollagen mRNA early in carbon tetrachloride-induced liver fibrosis, suggesting LOXL1 participates in lysine-derived cross-link formation in collagenous substrates with potentially different substrate specificity from LOX (which parallels type I collagen).\",\n      \"method\": \"Real-time RT-PCR and Northern blotting in mouse liver fibrosis model\",\n      \"journal\": \"Journal of cellular biochemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — single lab, expression-based in disease model with mechanistic inference; no direct enzymatic assay\",\n      \"pmids\": [\"10022501\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"All four haplotype variants of LOXL1 (R141L and G153D combinations) exhibit beta-aminopropionitrile (BAPN)-inhibitable amine oxidase activity toward elastin, type I collagen, and cadaverine; the disease-associated coding variants R141L and G153D in the NH2-terminal region do not significantly affect amine oxidase catalytic activity.\",\n      \"method\": \"Recombinant protein expression, nickel-affinity purification, and peroxidase-coupled fluorometric amine oxidase assay with BAPN inhibition\",\n      \"journal\": \"Molecular vision\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — in vitro enzymatic assay with purified recombinant variants and specific inhibitor controls\",\n      \"pmids\": [\"22328822\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"LOXL1 coding variants R141L and G153D are likely surface-exposed residues; the amino acid substitutions alter local protein electrostatic potential and modify protein-protein interactions, specifically affecting processing of secreted LOXL1 by endogenous proteases (possibly BMP-1, which cleaves LOXL1 for enzymatic activation), as detected by immunoprecipitation of secreted variant proteins in RFL-6 cells.\",\n      \"method\": \"Molecular modelling, ectopic expression in RFL-6 rat fetal lung fibroblasts, immunoprecipitation of secreted proteins, immunofluorescence\",\n      \"journal\": \"Experimental eye research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2/3 — single lab, immunoprecipitation with functional inference; BMP-1 as processor is proposed but not directly confirmed\",\n      \"pmids\": [\"26997634\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"LOXL1 knockout mice develop disruption of the blood-aqueous barrier in the ocular anterior segment, lens abnormalities (anterior subcapsular vesiculation), and decreased elastin in the iris and ciliary body, demonstrating that LOXL1 is required for elastic fiber maintenance in ocular tissues.\",\n      \"method\": \"Loxl1 null mouse phenotyping: anterior segment histology, fluorescein angiography, immunohistochemistry for elastin\",\n      \"journal\": \"Investigative ophthalmology & visual science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — clean KO with defined ocular phenotype, multiple orthogonal readouts (histology, angiography, IHC)\",\n      \"pmids\": [\"24425853\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Mice deficient in LOXL1 develop pelvic organ prolapse with a global connective tissue defect; LOXL1(-/-) vaginal and supportive tissues show a 31% decrease in ultimate load at failure compared to wild-type, demonstrating that LOXL1 is required for normal biomechanical properties of pelvic floor connective tissues.\",\n      \"method\": \"Loxl1 null mouse biomechanical testing to failure of vagina and supportive tissue complex\",\n      \"journal\": \"International urogynecology journal and pelvic floor dysfunction\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — clean KO with quantitative biomechanical phenotype, consistent with known enzymatic function in elastin crosslinking\",\n      \"pmids\": [\"18265927\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"LOXL1 is the specific LOX family member responsible for elastin crosslinking in liver cirrhosis; LOXL1 co-localizes with alpha-SMA in cirrhotic liver and is absent in normal and fibrotic (non-cirrhotic) liver; AAV-shRNA-mediated LOXL1 knockdown in CCl4-induced cirrhosis mice reduces insoluble elastin by 58% and collagen area by 51%, arresting disease progression.\",\n      \"method\": \"CCl4 mouse fibrosis/cirrhosis model, immunohistochemistry, AAV2/8 shRNA knockdown, quantitative elastin/collagen analysis\",\n      \"journal\": \"Biochimica et biophysica acta. Molecular basis of disease\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — clean in vivo KD with multiple orthogonal quantitative readouts, replicated in cell culture\",\n      \"pmids\": [\"29366776\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"LOXL1 knockdown in TGF-β1-stimulated hepatic stellate cells (LX-2) suppresses proliferation and fibrogenesis by reducing phosphorylation of Smad2 and Smad3; Smad2/3 double knockdown abolishes both TGF-β1- and LOXL1 overexpression-mediated fibrogenic effects, placing LOXL1 upstream of the Smad2/3 pathway in hepatic stellate cell activation.\",\n      \"method\": \"siRNA knockdown and overexpression in LX-2 cells, Western blot for pSmad2/3, proliferation assay, genetic epistasis (double knockdown)\",\n      \"journal\": \"Biomedicine & pharmacotherapy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — epistasis with double knockdown and orthogonal readouts, single lab\",\n      \"pmids\": [\"30257391\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Hepatic stellate cell-specific LOXL1 knockout prevents CCl4-induced liver fibrosis and NASH-associated inflammation; RNA sequencing identifies integrin α8 (ITGA8) as a key upstream modulator of LOXL1; siRNA silencing of ITGA8 reduces LOXL1 expression; HIF1α directly binds the LOXL1 promoter and upregulates its expression; LOXL1 activates FAK/PI3K/AKT/HIF1α signaling, forming a positive feedback loop.\",\n      \"method\": \"HSC-specific Loxl1fl/fl Gfap-cre knockout mice, CCl4/CDAA diet models, RNA sequencing, ChIP (HIF1α-LOXL1 promoter), siRNA epistasis, FAK/PI3K inhibitor experiments\",\n      \"journal\": \"FASEB journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — conditional KO with RNA-seq, ChIP, and pharmacological epistasis; multiple orthogonal methods in a single study\",\n      \"pmids\": [\"34569648\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"HSC-specific LOXL1 deficiency (Loxl1fl/fl Gfapcre) in CDAA diet-induced non-obese NASH mice ameliorates hepatic steatosis, inflammation, and fibrosis, and restores adipose tissue function, indicating LOXL1 in HSCs contributes to both ECM crosslinking and systemic metabolic dysregulation in non-obese NAFLD.\",\n      \"method\": \"Conditional HSC-specific Loxl1 knockout mice on CDAA diet, liver histology, pro-fibrogenic/inflammatory gene expression, serum LOXL1 correlation with fibrosis in human NAFLD biopsies\",\n      \"journal\": \"Hepatology international\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — conditional KO with multiple phenotypic readouts and human validation\",\n      \"pmids\": [\"34014450\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"LOXL1 protein is directly identified as a component of surgically isolated pseudoexfoliation (PEX) material from anterior lens capsules by mass spectrometry, confirmed by immunohistochemistry, establishing that LOXL1 protein is physically incorporated into pathological PEX deposits.\",\n      \"method\": \"Direct mass spectrometry of isolated PEX material, immunohistochemistry confirmation\",\n      \"journal\": \"Experimental eye research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1/2 — direct proteomics identification replicated by IHC, robust analytical approach\",\n      \"pmids\": [\"19442659\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"A noncoding rs11638944:C>G transversion in introns 1-2 of LOXL1, in a region with enhancer-like chromatin features, mediates cis-acting reduction in LOXL1 mRNA levels through differential binding of transcription factor RXRα and by modulating alternative splicing of LOXL1 exons, leading to reduced LOXL1 mRNA in risk allele carrier cells and tissues.\",\n      \"method\": \"GWAS, luciferase reporter assays, RXRα binding (EMSA/ChIP), alternative splicing analysis by RT-PCR, allele-specific expression in patient tissues\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal molecular methods (GWAS, reporter, binding assay, splicing, patient tissue expression) in a single rigorous study\",\n      \"pmids\": [\"28534485\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"TGF-β1, oxidative stress, UV light, and hypoxia induce significant upregulation of LOXL1 expression and elastic fiber proteins in human Tenon's capsule fibroblasts, with assembly into extracellular microfibrillar networks and PEX-like fibrils, demonstrating that these pathogenic stimuli regulate LOXL1-mediated elastic fiber formation.\",\n      \"method\": \"Cultured human fibroblast stimulation, real-time PCR, Western blotting, immunohistochemistry, electron microscopy\",\n      \"journal\": \"Investigative ophthalmology & visual science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods in a single lab; electron microscopy shows fibril assembly consequence\",\n      \"pmids\": [\"21948647\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"LOXL1 inhibits the transcriptional activity of YAP in colorectal cancer by physically interacting with MST1/2 kinases and increasing their phosphorylation, thereby activating the Hippo pathway and functioning as a tumor suppressor.\",\n      \"method\": \"Co-immunoprecipitation, kinase phosphorylation assay, colony formation, wound healing, migration/invasion assays, in vivo xenograft and metastasis models\",\n      \"journal\": \"Cell communication and signaling\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — Co-IP establishes interaction; phosphorylation assay supports mechanism; single lab\",\n      \"pmids\": [\"32912229\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"LOXL1 interacts with the antiapoptotic protein BAG2 through a hydrogen bond between LOXL1-D515 and BAG2-K186; LOXL1's lysyl oxidase enzymatic activity prevents BAG2 degradation by competing with K186 ubiquitylation, thereby stabilizing BAG2 and conferring antiapoptotic activity in glioma cells; LOXL1 expression is specifically upregulated via the VEGFR-Src-CEBPA transcriptional axis.\",\n      \"method\": \"Co-immunoprecipitation, molecular docking/hydrogen bond analysis, ubiquitylation competition assay, gain/loss-of-function in cells and animals, VEGFR-Src-CEBPA pathway analysis\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal Co-IP, ubiquitylation competition assay, and pathway epistasis in single study; single lab\",\n      \"pmids\": [\"32424143\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"LOXL1 promotes angiogenesis in intrahepatic cholangiocarcinoma by interacting with fibulin 5 (FBLN5), which binds αvβ3 integrin in an RGD domain-dependent manner, activating the FAK-MAPK signaling pathway in vascular endothelial cells.\",\n      \"method\": \"Co-immunoprecipitation (LOXL1-FBLN5 interaction), αvβ3 integrin binding assays, FAK-MAPK pathway Western blotting, overexpression/knockdown in RBE and 9810 cells, in vivo angiogenesis models\",\n      \"journal\": \"Molecular therapy. Nucleic acids\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — Co-IP establishes LOXL1-FBLN5 interaction; downstream pathway validated; single lab\",\n      \"pmids\": [\"33614230\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"LOXL1 promotes tumor growth and invasion in invasive lobular carcinoma (ILC) by remodeling extracellular matrix; pan-LOX inhibitor BAPN and LOXL1-specific silencing decrease tumor growth, invasion, and metastasis by disrupting ECM structure, resulting in decreased estrogen receptor (ER) signaling.\",\n      \"method\": \"Intraductal xenograft models, BAPN pharmacological inhibition, shRNA knockdown, ECM structural analysis, ER signaling readouts\",\n      \"journal\": \"EMBO molecular medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — pharmacological and genetic inhibition in validated xenograft model with multiple readouts and mechanistic link to ER signaling\",\n      \"pmids\": [\"33616307\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"LOXL1 expression in non-small cell lung cancer (NSCLC) stroma is regulated by integrin α11 in cancer-associated fibroblasts; LOXL1 in turn mediates collagen matrix remodeling and collagen fiber alignment, supporting tumor growth and progression in a NSCLC xenograft model.\",\n      \"method\": \"Integrin α11 KD/OE, LOXL1 KD/OE in cancer-associated fibroblasts, collagen matrix assays, in vivo NSCLC xenograft model, correlation analysis in patient datasets\",\n      \"journal\": \"Cancers\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — genetic epistasis (integrin α11 regulates LOXL1), functional in vivo consequence; single lab\",\n      \"pmids\": [\"31121900\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"LOXL1-AS1 lncRNA localizes to the nucleus where it selectively binds to the mRNA processing protein hnRNPL; both components regulate global gene expression in ocular cells relevant to pseudoexfoliation glaucoma pathogenesis.\",\n      \"method\": \"RNA-FISH (nuclear localization), RNA immunoprecipitation (RIP), pulldown assays identifying hnRNPL as LOXL1-AS1 binding partner, functional gene expression analysis\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct RIP and pulldown identify binding partner; nuclear localization confirmed by imaging; single lab\",\n      \"pmids\": [\"32037441\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Risk alleles in the region upstream of the LOXL1-AS1 lncRNA (located at the 3'-end of exon 1 and adjacent intron 1 of LOXL1) are functional variants that significantly modulate LOXL1-AS1 promoter activity; LOXL1-AS1 expression is altered by oxidative stress in human lens epithelial cells and by cyclic mechanical stress in Schlemm's canal endothelial cells, implicating this lncRNA in cellular stress response relevant to pseudoexfoliation syndrome.\",\n      \"method\": \"Deep sequencing of LOXL1 locus, luciferase promoter reporter assays, multi-population replication, cell stress experiments with qRT-PCR\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — reporter assays confirm functional variants; stress response replicated across cell types; multi-population validation\",\n      \"pmids\": [\"26307087\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"The LOXL1 N-terminus (first ~369 aa) constitutes an intrinsically disordered region (IDR) with maximum disorder at amino acid position 153 (the G153D risk variant site); overexpression of LOXL1 or fluorescent chimeras preserving the intact N-terminus causes copious intracellular protein aggregation in XFG patient-derived fibroblasts; in XFG cells, a substantial fraction of LOXL1 is processed for autophagic degradation.\",\n      \"method\": \"In silico disorder prediction, overexpression with fluorescent tags, aggregation assays, autophagy flux assays in XFG patient-derived fibroblasts\",\n      \"journal\": \"Advances in protein chemistry and structural biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — computational prediction supported by cell-based aggregation and autophagy assays; single lab, no structural validation\",\n      \"pmids\": [\"31928728\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"The protective variant rs7173049-G at the LOXL1 locus lies in an enhancer-like region that regulates ISLR2 and STRA6 expression via allele-specific binding of thyroid hormone receptor beta; siRNA-mediated downregulation of retinoic acid (RA) signaling induces upregulation of LOXL1 and PEX-associated matrix genes, linking RA signaling via STRA6 to regulation of LOXL1 expression in PEX-relevant cell types.\",\n      \"method\": \"LOXL1 deep sequencing across 9 ethnic populations, luciferase enhancer assays, allele-specific transcription factor binding (thyroid hormone receptor beta EMSA/ChIP), siRNA knockdown of RA signaling components, tissue expression analysis\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods (reporter, TF binding, siRNA epistasis, tissue expression) in multi-population study\",\n      \"pmids\": [\"30986821\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Loxl1-deficient mice develop pelvic organ prolapse with disorganized collagen and elastic fibers in pelvic tissues, urinary dysfunction, decreased pelvic floor tissue mechanical properties, and upregulation of ECM catabolism and inflammatory response genes, consistent with pathological features in human POP patients.\",\n      \"method\": \"Loxl1 knockout mice, histology of collagen/elastic fibers, urodynamics, mechanical testing, GO/transcriptome analysis, comparison to human prolapse tissue\",\n      \"journal\": \"Aging\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — multiple phenotypic readouts in KO model validated against human tissue; single lab\",\n      \"pmids\": [\"34923484\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"Platelet-rich plasma (PRP) induces post-natal maturation of immature articular cartilage with a 10-fold upregulation of LOXL1 gene expression correlating with a 5-fold increase in cartilage stiffness as measured by atomic force microscopy, identifying LOXL1 as a mediator of PRP-induced cartilage stiffening.\",\n      \"method\": \"In vitro PRP treatment of immature cartilage explants, gene expression analysis, atomic force microscopy for stiffness, BrdU incorporation for proliferation\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — single lab, correlation between LOXL1 expression and biomechanical outcome; direct mechanistic link not fully established\",\n      \"pmids\": [\"28623328\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"LOXL1 is an extracellular copper-dependent amine oxidase that cross-links elastin and fibrillar collagens through deamination of peptidyl lysyl residues, and is required for elastic fiber formation and stabilization in multiple tissues; it also functions intracellularly to stabilize the antiapoptotic protein BAG2 by competing with its ubiquitylation, and signals through the FAK/PI3K/AKT/HIF1α axis in hepatic stellate cells, while its expression is regulated by TGF-β1, oxidative stress, RXRα-dependent and alternative splicing-dependent mechanisms at the LOXL1 locus, with loss of function causing defective elastin crosslinking, impaired connective tissue biomechanics, and features of pseudoexfoliation syndrome and pelvic organ prolapse in mice.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"LOXL1 is an extracellular copper-dependent amine oxidase that catalyzes oxidative deamination of peptidyl lysine residues in elastin and fibrillar collagens, driving covalent cross-link formation essential for elastic fiber assembly and connective tissue mechanical integrity. All tested coding variants retain BAPN-inhibitable amine oxidase activity toward elastin, type I collagen, and cadaverine, though disease-associated variants R141L and G153D alter surface electrostatics and proteolytic processing rather than catalytic function [PMID:22328822, PMID:26997634]. Loxl1 knockout mice develop pelvic organ prolapse with globally weakened connective tissues, disrupted ocular anterior segment barriers with decreased elastin, and resistance to CCl4-induced liver cirrhosis when deleted specifically in hepatic stellate cells, where LOXL1 activates a FAK/PI3K/AKT/HIF1α positive feedback loop and signals through Smad2/3 [PMID:18265927, PMID:24425853, PMID:34569648, PMID:30257391]. Beyond its extracellular catalytic role, LOXL1 stabilizes the antiapoptotic protein BAG2 by competing with ubiquitylation at K186, confers antiapoptotic activity in glioma, and activates the Hippo pathway by phosphorylating MST1/2 kinases in colorectal cancer cells [PMID:32424143, PMID:32912229].\",\n  \"teleology\": [\n    {\n      \"year\": 1999,\n      \"claim\": \"Identifying LOXL1 as co-regulated with type III procollagen during liver fibrosis established it as a cross-linking enzyme with potentially distinct substrate preference from LOX.\",\n      \"evidence\": \"RT-PCR and Northern blot in CCl4-treated mouse liver fibrosis model\",\n      \"pmids\": [\"10022501\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No direct enzymatic assay on type III collagen substrate\", \"Substrate specificity versus LOX inferred from co-expression, not biochemistry\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Comprehensive tissue and developmental mapping revealed LOXL1 as an extracellular and nuclear enzyme with distinct spatial expression from LOX, broadening its potential functional contexts beyond ECM crosslinking.\",\n      \"evidence\": \"Immunohistochemistry across multiple mouse tissues and developmental stages\",\n      \"pmids\": [\"15609098\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Nuclear localization function unexplained\", \"Single method (IHC) without biochemical confirmation of nuclear activity\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Loxl1 knockout mice developing pelvic organ prolapse with quantifiable biomechanical failure demonstrated that LOXL1 is non-redundant for connective tissue structural integrity in vivo.\",\n      \"evidence\": \"Biomechanical testing to failure of vaginal/supportive tissue complex in Loxl1-null mice\",\n      \"pmids\": [\"18265927\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Relative contribution of elastin versus collagen crosslinking defects not separated\", \"No rescue experiment performed\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Direct identification of LOXL1 protein within pseudoexfoliation deposits linked the enzyme physically to PEX disease pathology, not just genetically.\",\n      \"evidence\": \"Mass spectrometry of surgically isolated PEX material from anterior lens capsules, confirmed by IHC\",\n      \"pmids\": [\"19442659\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether LOXL1 in PEX deposits is enzymatically active or aggregated unclear\", \"Causative versus bystander role in deposit formation not resolved\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Demonstrating that all four R141L/G153D haplotype variants retain full BAPN-inhibitable amine oxidase activity showed that PEX-associated coding variants do not impair catalysis, redirecting attention to non-catalytic mechanisms of disease.\",\n      \"evidence\": \"Recombinant protein purification and peroxidase-coupled fluorometric amine oxidase assay with BAPN inhibition\",\n      \"pmids\": [\"22328822\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Substrate range tested limited to elastin, type I collagen, cadaverine\", \"Processing and secretion effects of variants not assessed in this study\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Loxl1-null mice developing disrupted blood-aqueous barrier and decreased ocular elastin established LOXL1 as essential for elastic fiber maintenance in the anterior segment, directly relevant to PEX pathogenesis.\",\n      \"evidence\": \"Loxl1 knockout mouse phenotyping with histology, fluorescein angiography, and elastin IHC\",\n      \"pmids\": [\"24425853\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"No rescue with exogenous LOXL1 attempted\", \"Mechanism linking elastin loss to barrier disruption not defined\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Identification of functional risk variants in the LOXL1-AS1 promoter region that respond to oxidative and mechanical stress established a regulatory lncRNA layer at the LOXL1 locus relevant to PEX pathogenesis.\",\n      \"evidence\": \"Deep sequencing, luciferase promoter reporters, cell stress experiments in lens epithelial and Schlemm's canal endothelial cells\",\n      \"pmids\": [\"26307087\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"LOXL1-AS1 mechanism of action on LOXL1 protein expression not defined\", \"Whether lncRNA regulates LOXL1 in cis or trans unclear\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Showing that R141L/G153D variants alter LOXL1 proteolytic processing rather than catalysis provided a mechanistic explanation for how coding variants cause disease without affecting enzyme activity.\",\n      \"evidence\": \"Molecular modelling and immunoprecipitation of secreted variant proteins in RFL-6 fibroblasts\",\n      \"pmids\": [\"26997634\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"BMP-1 as the responsible protease proposed but not directly confirmed\", \"Processing differences not quantitated with purified protease\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Discovery that the intronic rs11638944 variant reduces LOXL1 mRNA through RXRα-dependent transcription and alternative splicing established a cis-regulatory mechanism for disease-associated LOXL1 downregulation.\",\n      \"evidence\": \"GWAS, luciferase reporters, RXRα EMSA/ChIP, splicing analysis, allele-specific expression in patient tissues\",\n      \"pmids\": [\"28534485\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether RXRα binding is necessary or sufficient for expression change not separated from splicing effects\", \"Downstream functional consequence of specific splice variants not characterized\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Identifying LOXL1 as the specific LOX family member driving elastin crosslinking in liver cirrhosis — absent in normal/fibrotic liver but co-localizing with activated HSCs in cirrhosis — separated its cirrhotic role from other family members and showed therapeutic knockdown arrests disease progression.\",\n      \"evidence\": \"CCl4 mouse cirrhosis model with AAV-shRNA LOXL1 knockdown, quantitative elastin/collagen analysis, IHC\",\n      \"pmids\": [\"29366776\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether LOXL1 knockdown reverses established cirrhosis versus prevents progression not tested\", \"Substrate specificity in cirrhotic ECM not defined biochemically\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Placing LOXL1 upstream of Smad2/3 phosphorylation in TGF-β1-stimulated hepatic stellate cells revealed a signaling role beyond its extracellular catalytic function.\",\n      \"evidence\": \"siRNA knockdown, overexpression, Smad2/3 double knockdown epistasis in LX-2 cells\",\n      \"pmids\": [\"30257391\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether LOXL1 activates Smad2/3 through enzymatic activity or protein-protein interaction not resolved\", \"Mechanism of Smad2/3 phosphorylation induction unknown\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Demonstrating that the LOXL1 N-terminus is an intrinsically disordered region prone to intracellular aggregation in XFG patient fibroblasts, with autophagic clearance, provided a proteostasis-based disease mechanism complementing the crosslinking deficiency model.\",\n      \"evidence\": \"In silico disorder prediction, overexpression aggregation assays, autophagy flux assays in XFG patient-derived fibroblasts\",\n      \"pmids\": [\"31928728\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No structural validation of disorder by NMR or SAXS\", \"Aggregation propensity of endogenous versus overexpressed protein not compared\", \"Whether aggregation is pathogenic or protective unclear\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Linking a protective LOXL1-locus variant to retinoic acid signaling via STRA6 regulation identified a systemic signaling axis — thyroid hormone receptor β and RA pathway — converging on LOXL1 expression control.\",\n      \"evidence\": \"Multi-population deep sequencing, enhancer reporters, THRβ EMSA/ChIP, siRNA knockdown of RA signaling\",\n      \"pmids\": [\"30986821\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether RA-mediated LOXL1 regulation is direct or indirect not fully resolved\", \"Therapeutic potential of RA modulation not tested in disease model\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Discovery that LOXL1 stabilizes BAG2 by competing with ubiquitylation at K186 revealed a non-canonical intracellular function — regulation of protein turnover — independent of its canonical oxidase activity, with antiapoptotic consequences in glioma.\",\n      \"evidence\": \"Reciprocal Co-IP, molecular docking, ubiquitylation competition assay, gain/loss-of-function in glioma cells and xenografts\",\n      \"pmids\": [\"32424143\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether LOXL1 enzymatic activity is required for BAG2 stabilization not tested with catalytic-dead mutant\", \"Generalizability beyond glioma unknown\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Identification of LOXL1 as a Hippo pathway activator through physical interaction with MST1/2 kinases established a tumor-suppressive signaling function in colorectal cancer distinct from its ECM role.\",\n      \"evidence\": \"Co-IP of LOXL1-MST1/2, kinase phosphorylation assay, xenograft and metastasis models in CRC cells\",\n      \"pmids\": [\"32912229\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether MST1/2 interaction requires LOXL1 catalytic domain not determined\", \"Single cancer type; generalizability unclear\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Hepatic stellate cell-specific Loxl1 conditional knockout preventing fibrosis and NASH, combined with identification of the ITGA8→LOXL1→FAK/PI3K/AKT/HIF1α positive feedback loop, defined the cell-autonomous and signaling circuit through which LOXL1 drives liver disease.\",\n      \"evidence\": \"HSC-specific Loxl1 conditional KO, CCl4/CDAA models, RNA-seq, HIF1α ChIP on LOXL1 promoter, pharmacological inhibitors\",\n      \"pmids\": [\"34569648\", \"34014450\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether the FAK/PI3K/AKT/HIF1α loop operates in non-hepatic tissues not tested\", \"Direct ITGA8-LOXL1 interaction mechanism not defined\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"Key unresolved questions include the structural basis of LOXL1 N-terminal disorder and aggregation, the mechanism by which LOXL1 activates intracellular kinases (MST1/2, Smad2/3, FAK) independently of its oxidase activity, and whether the distinct extracellular (crosslinking) and intracellular (BAG2 stabilization, Hippo activation) functions are coupled or context-specific.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No crystal or cryo-EM structure available\", \"Catalytic-dead mutant not systematically tested across signaling and stabilization functions\", \"Relative contribution of enzymatic versus non-enzymatic functions in disease models not separated\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0016491\", \"supporting_discovery_ids\": [2, 6]},\n      {\"term_id\": \"GO:0140096\", \"supporting_discovery_ids\": [14]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [13, 14]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0031012\", \"supporting_discovery_ids\": [0, 10, 12]},\n      {\"term_id\": \"GO:0005576\", \"supporting_discovery_ids\": [0, 2, 10]},\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [0]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-1474244\", \"supporting_discovery_ids\": [2, 5, 6, 16, 17]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [7, 8, 13, 15]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [6, 8, 9]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\n      \"BAG2\",\n      \"FBLN5\",\n      \"MST1\",\n      \"MST2\",\n      \"ITGA8\",\n      \"HIF1A\",\n      \"RXRA\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}