{"gene":"LOXL1","run_date":"2026-06-10T02:59:50","timeline":{"discoveries":[{"year":1999,"finding":"LOXL1 (mouse LOXL) mRNA is co-induced with type III procollagen mRNA during early carbon tetrachloride-induced liver fibrosis, whereas LOX co-induces with type I procollagen, suggesting LOXL1 has distinct collagen-type substrate specificity compared to LOX.","method":"Real-time RT-PCR of mRNA levels during CCl4-induced liver fibrosis in mice","journal":"Journal of cellular biochemistry","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single lab, single method (mRNA correlation), no direct enzymatic or protein-level confirmation of substrate specificity","pmids":["10022501"],"is_preprint":false},{"year":2004,"finding":"LOXL1 protein co-localizes with LOX in multiple tissues (skin, aorta, heart, lung, liver, cartilage) but occupies distinct zones in kidney, gut, retina, and gonads; both proteins are also found in cell nuclei across several tissues, suggesting nuclear as well as extracellular functions.","method":"Comparative immunohistochemistry in normal and developing mouse tissues across developmental stages","journal":"Journal of molecular histology","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — direct localization by immunohistochemistry across multiple tissues and developmental stages, single lab but systematic comparison","pmids":["15609098"],"is_preprint":false},{"year":2007,"finding":"LOXL1 overexpression in human bladder cancer cells decreases colony formation and antagonizes Ras-induced activation of the ERK signaling pathway, indicating a tumor-suppressive function mediated through inhibition of Ras/ERK.","method":"Re-expression of LOXL1 in bladder cancer cell lines; colony formation assay; Western blot for ERK phosphorylation","journal":"Cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — clean loss/gain-of-function with defined cellular phenotype and pathway readout, single lab","pmids":["17456585"],"is_preprint":false},{"year":2008,"finding":"Homozygous LOXL1 knockout (Loxl1−/−) mice develop mechanically weaker vaginal and pelvic supportive tissues, with a 31% decrease in ultimate load at failure, indicating a global connective tissue defect attributable to loss of LOXL1-mediated extracellular matrix crosslinking.","method":"Biomechanical tensile testing to failure of vaginal tissue complexes from Loxl1−/− and wild-type mice","journal":"International urogynecology journal and pelvic floor dysfunction","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — clean KO with specific biomechanical phenotypic readout, single lab","pmids":["18265927"],"is_preprint":false},{"year":2008,"finding":"LOXL1 expression in rat aorta is maintained throughout life predominantly in intima and media (in contrast to LOX which peaks embryonically then drops), suggesting LOXL1 plays a specific role in adult elastin and collagen fiber remodeling distinct from the developmental role of LOX.","method":"Immunohistochemistry and real-time RT-PCR across developmental, growth, and aging stages in two rat strains; combined with elastin/collagen content measurements","journal":"Rejuvenation research","confidence":"Low","confidence_rationale":"Tier 3 / Weak — localization without direct functional manipulation, single lab","pmids":["18803461"],"is_preprint":false},{"year":2009,"finding":"LOXL1 protein is directly identified as a component of surgically isolated pseudoexfoliation (PEX) material from anterior lens capsules, consistent with its role as a cross-linking enzyme participating in formation of pathological PEX deposits.","method":"Direct mass spectrometry of surgically isolated PEX material; immunohistochemical confirmation on lens capsules","journal":"Experimental eye research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — two orthogonal methods (MS and IHC) directly identifying LOXL1 protein in disease-relevant deposits, single lab","pmids":["19442659"],"is_preprint":false},{"year":2011,"finding":"TGF-β1, oxidative stress, UV light, and hypoxia upregulate LOXL1 expression and promote assembly of elastin/microfibrillar networks into PEX-like fibrils in human Tenon fibroblasts; cells carrying the high-risk LOXL1 haplotype show slightly decreased basal and stimulated LOXL1 expression compared to low-risk haplotype cells.","method":"Exposure of cultured human Tenon's capsule fibroblasts (high- vs. low-risk LOXL1 haplotypes) to pathogenic stimuli; quantitative real-time PCR, Western blot, immunohistochemistry, electron microscopy","journal":"Investigative ophthalmology & visual science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple orthogonal methods in a single lab with genotype-stratified cell cultures","pmids":["21948647"],"is_preprint":false},{"year":2014,"finding":"Loxl1−/− mice show compromise of the blood-aqueous humor barrier (increased fluorescein diffusion into anterior chamber), anterior lens subcapsular vesiculation, and decreased elastin in iris and ciliary body, but no macromolecular deposit accumulation or elevated intraocular pressure, demonstrating that LOXL1 is required for ocular anterior segment integrity and elastin maintenance.","method":"Clinical and histological analysis, fluorescein angiography, IOP measurement, and immunohistochemistry in Loxl1 null vs. C57BL control mice","journal":"Investigative ophthalmology & visual science","confidence":"High","confidence_rationale":"Tier 2 / Moderate — clean knockout model with multiple orthogonal phenotypic readouts (angiography, histology, IHC), single lab","pmids":["24425853"],"is_preprint":false},{"year":2014,"finding":"LOXL1 is a major component of exfoliation (XFS) material, co-localizing with elastin, fibrillin-1, and fibulin-4; LOXL1 expression is upregulated in early XFS anterior eye tissues but downregulated in advanced stages and specifically downregulated in the lamina cribrosa of XFS eyes, where ultrastructural elastic fiber network alterations are observed.","method":"Real-time PCR, immunohistochemistry, Western blot, and electron microscopy on human XFS and control eye tissues; in vitro cell stimulation assays","journal":"Journal of glaucoma","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple orthogonal methods on human tissue, single lab, findings consistent with prior reports","pmids":["25275906"],"is_preprint":false},{"year":2015,"finding":"A 7-kb region spanning introns 1-2 of LOXL1 contains an enhancer-like promoter for the antisense lncRNA LOXL1-AS1; XFS risk alleles in this region functionally modulate promoter activity, and LOXL1-AS1 expression is altered by oxidative stress and cyclic mechanical stress in ocular cells.","method":"Deep sequencing of LOXL1 locus; luciferase promoter activity assays; multi-population replication; expression analysis in stressed ocular cells","journal":"Human molecular genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — functional promoter assays with multi-population replication, but findings concern the lncRNA regulation rather than the LOXL1 protein mechanism directly","pmids":["26307087"],"is_preprint":false},{"year":2015,"finding":"LOXL1 promoter CpG islands are hypermethylated in lens capsule samples from PEX patients compared to age-related cataract controls, with corresponding reduction in LOXL1 mRNA and protein, indicating epigenetic silencing of LOXL1 in PEX tissue.","method":"Pyrosequencing of CpG islands; quantitative real-time PCR and Western blot on lens capsule specimens","journal":"Investigative ophthalmology & visual science","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — two orthogonal methods on disease tissue, single lab, small sample size (n=10 per group)","pmids":["26348632"],"is_preprint":false},{"year":2016,"finding":"The PEX-associated coding variants Arg141Leu and Gly153Asp in LOXL1 affect surface electrostatics at likely protein-protein interaction sites and alter processing of secreted LOXL1 protein variants by endogenous proteases (possibly BMP-1), as shown by differential immunoprecipitation of secreted forms from fibroblasts.","method":"Molecular modelling; ectopic expression in RFL-6 rat fetal lung fibroblasts; immunoprecipitation of secreted protein variants; immunofluorescence","journal":"Experimental eye research","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — protein-level functional consequence of coding variants shown by IP, supported by modelling, single lab","pmids":["26997634"],"is_preprint":false},{"year":2017,"finding":"The rs11638944:C>G transversion in intron 1-2 of LOXL1 exerts a cis-acting effect by (a) differentially modulating binding of transcription factor RXRα and (b) altering alternative splicing of LOXL1, leading to reduced LOXL1 mRNA levels in risk allele carriers.","method":"Genome-wide association scan; independent population replication; reporter and transcription factor binding assays; RNA splicing analysis in patient cells and tissues","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 / Strong — GWAS-guided functional dissection replicated in three independent populations, with transcription factor binding assays and splicing analysis as orthogonal mechanistic evidence","pmids":["28534485"],"is_preprint":false},{"year":2018,"finding":"LOXL1 specifically crosslinks elastin in the liver: LOXL1 expression coincides with appearance of insoluble/crosslinked elastin only in cirrhosis (not earlier fibrosis stages); AAV-delivered shRNA knockdown of LOXL1 in cirrhotic mice reduces insoluble elastin area by 58% and collagen area by 51%, arresting disease progression.","method":"CCl4-induced liver fibrosis/cirrhosis mouse model; AAV2/8 shRNA knockdown; biochemical quantification of crosslinked elastin and collagen; immunolocalization of LOXL1 with α-SMA; in vitro LOXL1 silencing in LX-2 cells","journal":"Biochimica et biophysica acta. Molecular basis of disease","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo genetic KD with quantitative biochemical readouts, complemented by in vitro confirmation, single lab but multiple orthogonal methods","pmids":["29366776"],"is_preprint":false},{"year":2018,"finding":"LOXL1 knockdown in TGF-β1-stimulated hepatic stellate cells (LX-2) suppresses cell proliferation and fibrogenic gene expression (TIMP1, α-SMA, collagen type I) and reduces phosphorylation of Smad2 and Smad3; conversely, Smad2/3 knockdown abolishes proliferation and fibrogenesis driven by LOXL1 overexpression, placing LOXL1 upstream of TGF-β1/Smad2/3 signaling.","method":"siRNA knockdown and overexpression in LX-2 cells; Western blot for Smad2/3 phosphorylation; proliferation assays; epistasis by double knockdown","journal":"Biomedicine & pharmacotherapy","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — genetic epistasis placing LOXL1 in Smad2/3 pathway, single lab","pmids":["30257391"],"is_preprint":false},{"year":2019,"finding":"LOXL1 expression in cancer-associated fibroblasts is regulated by integrin α11; LOXL1 promotes collagen matrix remodeling and collagen fiber alignment in vitro and in vivo, supporting NSCLC tumor growth in a xenograft model.","method":"LOXL1 knockdown and overexpression in CAFs; collagen gel contraction assays; second-harmonic generation microscopy for fiber alignment; NSCLC xenograft tumor growth","journal":"Cancers","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — in vitro and in vivo gain/loss-of-function, single lab","pmids":["31121900"],"is_preprint":false},{"year":2019,"finding":"A non-coding variant rs7173049-G downstream of LOXL1 correlates with allele-specific binding of thyroid hormone receptor beta, increased expression of ISLR2 and STRA6, and a consistent protective effect on PEX risk across nine populations; siRNA-mediated downregulation of retinoic acid signaling (STRA6 pathway) induces upregulation of LOXL1 and PEX-associated matrix genes in ocular cells, placing LOXL1 expression downstream of the RA/STRA6 axis.","method":"Deep sequencing; luciferase enhancer assays; transcription factor binding assays; multi-population replication; siRNA knockdown of RA pathway components with LOXL1 expression readout","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — functional enhancer assays plus nine-population genetic replication plus siRNA epistasis demonstrating regulatory pathway, multiple orthogonal methods","pmids":["30986821"],"is_preprint":false},{"year":2020,"finding":"LOXL1 interacts with BAG2 via a hydrogen bond between LOXL1-D515 and BAG2-K186; LOXL1's lysyl oxidase enzymatic activity prevents ubiquitination of BAG2-K186, thereby stabilizing BAG2 protein and conferring antiapoptotic activity in glioma cells. LOXL1 expression is specifically upregulated through the VEGFR-Src-CEBPA transcriptional axis.","method":"Co-immunoprecipitation; structural modeling of interaction; gain/loss-of-function in glioma cells and xenografts; ubiquitination assays; pathway epistasis (VEGFR-Src-CEBPA)","journal":"Cell death and differentiation","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal IP, mechanistic site identification, and in vivo validation, single lab but multiple orthogonal approaches","pmids":["32424143"],"is_preprint":false},{"year":2020,"finding":"LOXL1 inhibits colorectal cancer progression by interacting with MST1/2 kinases and increasing their phosphorylation, thereby suppressing YAP transcriptional activity via the Hippo pathway; overexpression of LOXL1 inhibits metastasis and tumor growth in vivo.","method":"Co-immunoprecipitation of LOXL1 with MST1/2; Western blot for MST1/2 phosphorylation; colony formation, migration/invasion, and xenograft assays","journal":"Cell communication and signaling","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — Co-IP and phosphorylation assay with in vivo validation, single lab","pmids":["32912229"],"is_preprint":false},{"year":2021,"finding":"LOXL1 silencing in ILC (invasive lobular carcinoma) cell lines decreases tumor growth, invasion, and metastasis in intraductal xenograft models by disrupting ECM structure; this is associated with decreased estrogen receptor (ER) signaling, indicating LOXL1-mediated ECM remodeling supports ER activity in ILC.","method":"LOXL1 shRNA knockdown and pan-LOX inhibitor BAPN in ILC intraductal xenograft models; ECM structural analysis; ER signaling readouts","journal":"EMBO molecular medicine","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — clean KD with in vivo phenotype and mechanistic linkage to ER signaling, single lab","pmids":["33616307"],"is_preprint":false},{"year":2021,"finding":"Hepatic stellate cell-specific LOXL1 knockout prevents CCl4-induced hepatic fibrosis and inflammation; RNA-seq identifies integrin α8 (ITGA8) as a key upstream regulator; LOXL1 activates the FAK/PI3K/AKT/HIF1α pathway, and HIF1α directly binds the LOXL1 promoter creating a positive feedback loop; FAK or PI3K inhibitors reduce LOXL1 expression.","method":"Conditional Loxl1 knockout in HSCs (Loxl1-Gfap-cre mice); RNA sequencing; siRNA silencing of ITGA8; ChIP/promoter binding assays for HIF1α; pharmacological inhibition of FAK/PI3K; fibrosis quantification (Sirius red, hydroxyproline)","journal":"FASEB journal","confidence":"High","confidence_rationale":"Tier 2 / Strong — cell-type-specific KO in vivo, RNA-seq pathway discovery, ChIP for direct transcription factor binding, pharmacological epistasis, multiple orthogonal methods in a single rigorous study","pmids":["34569648"],"is_preprint":false},{"year":2021,"finding":"Loxl1-deficient mice develop pelvic organ prolapse with disordered ECM (disarranged collagen and elastic fibers), urinary dysfunction, decreased mechanical properties of pelvic floor, upregulated ECM catabolism gene expression, and elevated inflammatory response, consistent with pathology in human POP patients.","method":"Histology, GO/transcriptomic analysis of differentially expressed genes, urodynamic functional testing, and mechanical testing in Loxl1 knockout mice; comparison to human prolapse tissue","journal":"Aging","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple phenotypic and molecular readouts in KO model with human tissue comparison, single lab","pmids":["34923484"],"is_preprint":false},{"year":2021,"finding":"LOXL1 interacts with fibulin-5 (FBLN5), which then binds αvβ3 integrin via an RGD domain, activating FAK-MAPK signaling in vascular endothelial cells to promote angiogenesis in intrahepatic cholangiocarcinoma; LOXL1 overexpression promotes proliferation, colony formation, metastasis, and angiogenesis in vivo and in vitro.","method":"Co-immunoprecipitation of LOXL1 with FBLN5; RGD domain-dependent binding assay; Western blot for FAK-MAPK activation; xenograft and angiogenesis assays","journal":"Molecular therapy. Nucleic acids","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — Co-IP identifying LOXL1-FBLN5 complex with downstream signaling validation, single lab","pmids":["33614230"],"is_preprint":false},{"year":2021,"finding":"HSC-specific LOXL1 deficiency in a CDAA diet-induced non-obese NASH model reduces inflammation, fibrosis, and hepatic steatosis and restores adipose tissue function; serum LOXL1 positively correlates with histological fibrosis and inversely with leptin in non-obese NAFLD patients.","method":"Conditional HSC-specific Loxl1 knockout mice (Loxl1fl/fl Gfap-cre); CDAA diet NASH model; liver histology and profibrogenic/pro-inflammatory gene expression; correlation analysis in human NAFLD patients","journal":"Hepatology international","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — conditional KO in vivo with multiple pathological readouts, single lab, human correlation supporting data","pmids":["34014450"],"is_preprint":false},{"year":2017,"finding":"LOXL1 gene expression is upregulated ~10-fold in platelet-rich plasma (PRP)-treated immature articular cartilage, correlating with a 5-fold increase in cartilage stiffness measured by atomic force microscopy, suggesting LOXL1-mediated ECM crosslinking contributes to PRP-induced cartilage maturation.","method":"In vitro PRP treatment of immature cartilage explants; gene expression profiling; atomic force microscopy for stiffness; BrdU incorporation for proliferation","journal":"Scientific reports","confidence":"Low","confidence_rationale":"Tier 3 / Weak — correlation of LOXL1 upregulation with stiffness, no direct manipulation of LOXL1, single lab","pmids":["28623328"],"is_preprint":false},{"year":2021,"finding":"miR-15b and miR-16 directly bind the 3'-UTR of LOXL1 mRNA and suppress LOXL1 expression in hepatic stellate cells; LOXL1 knockdown attenuates the pro-fibrogenic and pro-proliferative effects of miR-15b/16 downregulation, placing LOXL1 as a downstream effector of miR-15b/16 in TGF-β1-driven fibrosis.","method":"3'-UTR luciferase reporter assay; miRNA overexpression and knockdown in LX-2 cells; Western blot for Smad2/3 phosphorylation and fibrogenic markers; epistasis by LOXL1 knockdown in miR-15b/16-depleted cells","journal":"Life sciences","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — direct UTR binding validated by reporter assay and epistasis, single lab","pmids":["33545201"],"is_preprint":false},{"year":2019,"finding":"LOXL1 overexpression in gastric cancer cells promotes epithelial-mesenchymal transition (EMT), reducing CDH1 expression while increasing VIM, CDH2, SNAI2, and PLS3, and enhancing cell migration capacity.","method":"LOXL1 overexpression in GC cell lines; Western blot and morphological analysis for EMT markers; migration assay","journal":"PloS one","confidence":"Low","confidence_rationale":"Tier 3 / Weak — gain-of-function with EMT marker readouts, no mechanistic pathway identification, single lab","pmids":["33095806"],"is_preprint":false}],"current_model":"LOXL1 is an extracellular and nuclear lysyl oxidase family enzyme that crosslinks elastin and collagen in the ECM; it regulates elastic fiber formation and stability (required for blood-aqueous barrier integrity, vaginal tissue mechanics, and liver cirrhosis-stage elastin deposition), modulates intracellular signaling pathways including TGF-β1/Smad2/3, Hippo/MST1/2/YAP, FAK/PI3K/AKT/HIF1α, and Ras/ERK, interacts with BAG2 to prevent its ubiquitination and degradation, binds fibulin-5 to activate αvβ3 integrin/FAK-MAPK-driven angiogenesis, and its expression is regulated by RXRα-mediated transcriptional control, alternative splicing, promoter CpG methylation, miR-15b/16 targeting of its 3'-UTR, and a positive feedback loop through HIF1α."},"narrative":{"mechanistic_narrative":"LOXL1 is a lysyl oxidase family enzyme that crosslinks elastin and collagen in the extracellular matrix, governing the formation and stability of elastic fiber networks across connective tissues [PMID:18265927, PMID:29366776]. Loss of LOXL1 produces global connective-tissue defects: knockout mice show mechanically weaker vaginal and pelvic support tissues, pelvic organ prolapse with disorganized collagen and elastic fibers, and compromised ocular anterior-segment integrity with decreased elastin in iris and ciliary body and breakdown of the blood-aqueous barrier [PMID:18265927, PMID:24425853, PMID:34923484]. In the eye, LOXL1 is a direct structural component of pathological pseudoexfoliation/exfoliation deposits, co-localizing with elastin, fibrillin-1, and fibulin-4 [PMID:19442659, PMID:25275906], and its expression is tightly controlled by disease-associated regulatory variants and pathways, including cis-acting modulation of RXRα binding and alternative splicing, a downstream retinoic acid/STRA6 axis, and promoter CpG hypermethylation [PMID:26348632, PMID:28534485, PMID:30986821]. In the liver, LOXL1 crosslinks elastin specifically at the cirrhosis stage, and hepatic stellate cell-specific deletion prevents fibrosis; mechanistically LOXL1 sits upstream of TGF-β1/Smad2/3 signaling and drives a FAK/PI3K/AKT/HIF1α cascade in which HIF1α directly binds the LOXL1 promoter to create a positive feedback loop [PMID:29366776, PMID:30257391, PMID:34569648, PMID:34014450]. Beyond its canonical ECM role, LOXL1 modulates intracellular signaling in cancer with context-dependent outcomes: it antagonizes Ras/ERK and suppresses YAP through MST1/2-dependent Hippo activation in a tumor-suppressive capacity [PMID:17456585, PMID:32912229], while in other contexts it stabilizes the anti-apoptotic factor BAG2 by preventing its ubiquitination and promotes angiogenesis through a fibulin-5/αvβ3 integrin/FAK-MAPK axis [PMID:32424143, PMID:33614230]. LOXL1 expression is further regulated by integrin signaling (ITGA8, integrin α11) and by direct targeting of its 3'-UTR by miR-15b/16 [PMID:31121900, PMID:34569648, PMID:33545201].","teleology":[{"year":1999,"claim":"Established the first hint that LOXL1, unlike LOX, has distinct collagen-substrate associations, raising the question of functional specialization within the lysyl oxidase family.","evidence":"Real-time RT-PCR correlating Loxl1 and procollagen mRNAs during CCl4 liver fibrosis in mice","pmids":["10022501"],"confidence":"Low","gaps":["mRNA correlation only; no direct enzymatic or protein-level confirmation of substrate specificity","does not demonstrate crosslinking activity on any substrate"]},{"year":2004,"claim":"Mapped where LOXL1 protein resides relative to LOX, showing overlapping and distinct tissue zones and unexpected nuclear localization, broadening the scope of possible LOXL1 functions beyond the ECM.","evidence":"Comparative immunohistochemistry across developing mouse tissues","pmids":["15609098"],"confidence":"Medium","gaps":["nuclear function not defined","localization does not establish a molecular activity"]},{"year":2008,"claim":"Demonstrated that LOXL1 is required for the mechanical integrity of connective tissues, directly linking the enzyme to ECM crosslinking-dependent tissue strength.","evidence":"Biomechanical tensile testing of vaginal tissue in Loxl1-/- vs wild-type mice; IHC and RT-PCR across rat aorta aging","pmids":["18265927","18803461"],"confidence":"Medium","gaps":["molecular crosslink substrates not biochemically quantified in these assays","tissue-level phenotype does not isolate elastin vs collagen contribution"]},{"year":2009,"claim":"Identified LOXL1 as a direct physical constituent of pseudoexfoliation deposits, connecting the crosslinking enzyme to a defined human ocular pathology.","evidence":"Mass spectrometry of surgically isolated PEX material with IHC confirmation","pmids":["19442659"],"confidence":"Medium","gaps":["does not establish whether LOXL1 enzymatic activity drives deposit formation","causality between LOXL1 and PEX assembly not tested"]},{"year":2011,"claim":"Showed environmental and cytokine stimuli (TGF-β1, oxidative stress, UV, hypoxia) induce LOXL1 and PEX-like fibril assembly, and that risk haplotypes alter LOXL1 expression, linking genetic risk to a stress-responsive matrix phenotype.","evidence":"Genotype-stratified human Tenon fibroblast cultures with qPCR, Western, IHC, EM","pmids":["21948647"],"confidence":"Medium","gaps":["modest expression differences between haplotypes","causal link from expression change to fibril phenotype not isolated"]},{"year":2014,"claim":"Defined the in vivo ocular requirement for LOXL1 in blood-aqueous barrier and elastin maintenance, and confirmed LOXL1 as a major XFS deposit component co-localizing with elastic fiber proteins.","evidence":"Loxl1 null mouse clinical/histological analysis and fluorescein angiography; human XFS tissue PCR/IHC/Western/EM","pmids":["24425853","25275906"],"confidence":"High","gaps":["absence of IOP elevation leaves glaucoma mechanism unexplained","stage-dependent up- then down-regulation of LOXL1 in disease not mechanistically resolved"]},{"year":2015,"claim":"Localized PEX risk to non-coding regulatory elements at the LOXL1 locus, showing risk alleles modulate promoter activity and an antisense lncRNA, and that the locus is epigenetically silenced in disease tissue.","evidence":"Deep sequencing, luciferase promoter assays, multi-population replication; pyrosequencing of CpG islands in lens capsule","pmids":["26307087","26348632"],"confidence":"Medium","gaps":["lncRNA mechanism on LOXL1 protein function not established","small sample size for methylation analysis"]},{"year":2016,"claim":"Demonstrated that PEX coding variants alter LOXL1 surface electrostatics and protease processing of secreted protein, providing a protein-level mechanism for genetic risk.","evidence":"Molecular modelling and immunoprecipitation of secreted LOXL1 variants from fibroblasts","pmids":["26997634"],"confidence":"Medium","gaps":["BMP-1 as processing protease only inferred","functional consequence for crosslinking activity not measured"]},{"year":2017,"claim":"Pinpointed a causal cis-regulatory variant acting through RXRα binding and alternative splicing to reduce LOXL1 expression, establishing the molecular basis of the LOXL1 PEX association.","evidence":"GWAS with three-population replication, reporter and TF-binding assays, splicing analysis in patient tissues; cartilage stiffness correlation study","pmids":["28534485","28623328"],"confidence":"High","gaps":["tissue-specific splicing outcomes not fully enumerated","cartilage stiffness link is correlative without LOXL1 manipulation"]},{"year":2018,"claim":"Established LOXL1 as a stage-specific elastin crosslinker in liver cirrhosis whose knockdown arrests disease, and placed LOXL1 upstream of TGF-β1/Smad2/3 fibrogenic signaling.","evidence":"CCl4 cirrhosis model with AAV shRNA knockdown and biochemical crosslink quantification; siRNA/overexpression epistasis in LX-2 cells","pmids":["29366776","30257391"],"confidence":"High","gaps":["how an extracellular enzyme modulates intracellular Smad phosphorylation not mechanistically resolved","direct enzymatic crosslinking of elastin vs indirect signaling effects not fully separated"]},{"year":2019,"claim":"Showed LOXL1 functions in tumor stroma, regulated by integrins, to remodel and align collagen and support tumor growth, and that it can drive EMT in epithelial tumor cells.","evidence":"LOXL1 knockdown/overexpression in CAFs with SHG microscopy and NSCLC xenografts; LOXL1 overexpression and EMT markers in gastric cancer cells","pmids":["31121900","33095806"],"confidence":"Medium","gaps":["EMT effect lacks defined mechanistic pathway","integrin α11 to LOXL1 regulatory link not fully dissected"]},{"year":2020,"claim":"Revealed two intracellular signaling roles for LOXL1 in cancer: enzymatic stabilization of BAG2 via blocking its ubiquitination (anti-apoptotic) and MST1/2-dependent Hippo activation suppressing YAP (tumor-suppressive).","evidence":"Co-IP, interaction-site modeling, ubiquitination assays, and xenografts in glioma; Co-IP with MST1/2 and phosphorylation/xenograft assays in colorectal cancer","pmids":["32424143","32912229"],"confidence":"Medium","gaps":["opposing tumor-suppressive vs pro-survival roles not reconciled across tissues","single-lab Co-IP findings for each interaction"]},{"year":2021,"claim":"Defined a hepatic stellate cell autonomous LOXL1 fibrosis circuit (ITGA8 → FAK/PI3K/AKT/HIF1α with HIF1α-driven positive feedback), additional regulatory inputs (miR-15b/16, RA/STRA6, rs7173049), and broader roles in angiogenesis, ECM-supported ER signaling, and NASH.","evidence":"HSC-specific conditional Loxl1 knockout with RNA-seq, ChIP, and pharmacological epistasis; miRNA 3'-UTR reporter; multi-population enhancer/TF-binding assays; FBLN5 Co-IP; ILC and NASH models","pmids":["34569648","33545201","30986821","33614230","33616307","34923484","34014450"],"confidence":"High","gaps":["integration of the many parallel signaling and regulatory axes into one model is incomplete","relative contribution of enzymatic crosslinking vs signaling adaptor roles unresolved"]},{"year":null,"claim":"How a primarily extracellular crosslinking enzyme exerts the diverse intracellular signaling effects attributed to it (Smad2/3, Hippo, BAG2 stabilization, FAK/HIF1α) and the function of its reported nuclear pool remain unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["no structural or biochemical mechanism linking secreted LOXL1 to intracellular kinase pathways","nuclear LOXL1 function uncharacterized","no reconstituted enzymatic assay defining elastin vs collagen substrate preference"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0016491","term_label":"oxidoreductase activity","supporting_discovery_ids":[13,17]},{"term_id":"GO:0140096","term_label":"catalytic activity, acting on a protein","supporting_discovery_ids":[17]},{"term_id":"GO:0005198","term_label":"structural molecule activity","supporting_discovery_ids":[3,13,21]}],"localization":[{"term_id":"GO:0005576","term_label":"extracellular region","supporting_discovery_ids":[5,8,11]},{"term_id":"GO:0031012","term_label":"extracellular matrix","supporting_discovery_ids":[13,15,21]},{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[1]}],"pathway":[{"term_id":"R-HSA-1474244","term_label":"Extracellular matrix organization","supporting_discovery_ids":[13,15,21]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[14,18,20,22]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[5,8,13,21]}],"complexes":[],"partners":["BAG2","MST1","MST2","FBLN5"],"other_free_text":[]}},"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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Proliferation and Migration in Atherosclerosis.","date":"2020","source":"Journal of cardiovascular pharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/32453072","citation_count":24,"is_preprint":false},{"pmid":"33061856","id":"PMC_33061856","title":"LOXL1-AS1 contributes to the proliferation and migration of laryngocarcinoma cells through miR-589-5p/TRAF6 axis.","date":"2020","source":"Cancer cell international","url":"https://pubmed.ncbi.nlm.nih.gov/33061856","citation_count":24,"is_preprint":false},{"pmid":"19098994","id":"PMC_19098994","title":"Evaluation of LOXL1 polymorphisms in primary open-angle glaucoma in southern and northern Chinese.","date":"2008","source":"Molecular vision","url":"https://pubmed.ncbi.nlm.nih.gov/19098994","citation_count":24,"is_preprint":false},{"pmid":"34923484","id":"PMC_34923484","title":"Structural, functional and molecular pathogenesis of pelvic organ prolapse in patient and Loxl1 deficient mice.","date":"2021","source":"Aging","url":"https://pubmed.ncbi.nlm.nih.gov/34923484","citation_count":23,"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":23,"is_preprint":false},{"pmid":"33185692","id":"PMC_33185692","title":"Long non-conding RNA LOXL1-AS1 sponges miR-589-5p to up-regulate CBX5 expression in renal cell carcinoma.","date":"2020","source":"Bioscience reports","url":"https://pubmed.ncbi.nlm.nih.gov/33185692","citation_count":23,"is_preprint":false},{"pmid":"26997634","id":"PMC_26997634","title":"Biological effect of LOXL1 coding variants associated with pseudoexfoliation syndrome.","date":"2016","source":"Experimental eye 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cancer","url":"https://pubmed.ncbi.nlm.nih.gov/30720865","citation_count":22,"is_preprint":false},{"pmid":"23687437","id":"PMC_23687437","title":"Development of novel LOXL1 genotyping method and evaluation of LOXL1, APOE and MTHFR polymorphisms in exfoliation syndrome/glaucoma in a Greek population.","date":"2013","source":"Molecular vision","url":"https://pubmed.ncbi.nlm.nih.gov/23687437","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":"34012228","id":"PMC_34012228","title":"LOXL1 gene polymorphism candidates for exfoliation glaucoma are also associated with a risk for primary open-angle glaucoma in a Caucasian population from central Russia.","date":"2021","source":"Molecular vision","url":"https://pubmed.ncbi.nlm.nih.gov/34012228","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":"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":"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":"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":"33909695","id":"PMC_33909695","title":"LOXL1 gene polymorphisms are associated with exfoliation syndrome/exfoliation glaucoma risk: An updated meta-analysis.","date":"2021","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/33909695","citation_count":19,"is_preprint":false},{"pmid":"31908498","id":"PMC_31908498","title":"LOXL1-AS1 Drives The Progression Of Gastric Cancer Via Regulating miR-142-5p/PIK3CA Axis.","date":"2019","source":"OncoTargets and therapy","url":"https://pubmed.ncbi.nlm.nih.gov/31908498","citation_count":19,"is_preprint":false},{"pmid":"36037338","id":"PMC_36037338","title":"Structural basis of lipoprotein recognition by the bacterial Lol trafficking chaperone LolA.","date":"2022","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/36037338","citation_count":19,"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":"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":"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":"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":"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":"23960948","id":"PMC_23960948","title":"Review: The role of LOXL1 in exfoliation syndrome/glaucoma.","date":"2011","source":"Saudi journal of ophthalmology : official journal of the Saudi Ophthalmological Society","url":"https://pubmed.ncbi.nlm.nih.gov/23960948","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":"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":"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}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":56774,"output_tokens":6760,"usd":0.135861,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":15814,"output_tokens":4819,"usd":0.099773,"stage2_stop_reason":"end_turn"},"total_usd":0.235634,"stage1_batch_id":"msgbatch_01BbTCMyrRPyhtEq6b1MdwCN","stage2_batch_id":"msgbatch_011dEed5bbxYvTAaQWKJevxu","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1999,\n      \"finding\": \"LOXL1 (mouse LOXL) mRNA is co-induced with type III procollagen mRNA during early carbon tetrachloride-induced liver fibrosis, whereas LOX co-induces with type I procollagen, suggesting LOXL1 has distinct collagen-type substrate specificity compared to LOX.\",\n      \"method\": \"Real-time RT-PCR of mRNA levels during CCl4-induced liver fibrosis in mice\",\n      \"journal\": \"Journal of cellular biochemistry\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single lab, single method (mRNA correlation), no direct enzymatic or protein-level confirmation of substrate specificity\",\n      \"pmids\": [\"10022501\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"LOXL1 protein co-localizes with LOX in multiple tissues (skin, aorta, heart, lung, liver, cartilage) but occupies distinct zones in kidney, gut, retina, and gonads; both proteins are also found in cell nuclei across several tissues, suggesting nuclear as well as extracellular functions.\",\n      \"method\": \"Comparative immunohistochemistry in normal and developing mouse tissues across developmental stages\",\n      \"journal\": \"Journal of molecular histology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — direct localization by immunohistochemistry across multiple tissues and developmental stages, single lab but systematic comparison\",\n      \"pmids\": [\"15609098\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"LOXL1 overexpression in human bladder cancer cells decreases colony formation and antagonizes Ras-induced activation of the ERK signaling pathway, indicating a tumor-suppressive function mediated through inhibition of Ras/ERK.\",\n      \"method\": \"Re-expression of LOXL1 in bladder cancer cell lines; colony formation assay; Western blot for ERK phosphorylation\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — clean loss/gain-of-function with defined cellular phenotype and pathway readout, single lab\",\n      \"pmids\": [\"17456585\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Homozygous LOXL1 knockout (Loxl1−/−) mice develop mechanically weaker vaginal and pelvic supportive tissues, with a 31% decrease in ultimate load at failure, indicating a global connective tissue defect attributable to loss of LOXL1-mediated extracellular matrix crosslinking.\",\n      \"method\": \"Biomechanical tensile testing to failure of vaginal tissue complexes from Loxl1−/− and wild-type mice\",\n      \"journal\": \"International urogynecology journal and pelvic floor dysfunction\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — clean KO with specific biomechanical phenotypic readout, single lab\",\n      \"pmids\": [\"18265927\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"LOXL1 expression in rat aorta is maintained throughout life predominantly in intima and media (in contrast to LOX which peaks embryonically then drops), suggesting LOXL1 plays a specific role in adult elastin and collagen fiber remodeling distinct from the developmental role of LOX.\",\n      \"method\": \"Immunohistochemistry and real-time RT-PCR across developmental, growth, and aging stages in two rat strains; combined with elastin/collagen content measurements\",\n      \"journal\": \"Rejuvenation research\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — localization without direct functional manipulation, single lab\",\n      \"pmids\": [\"18803461\"],\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, consistent with its role as a cross-linking enzyme participating in formation of pathological PEX deposits.\",\n      \"method\": \"Direct mass spectrometry of surgically isolated PEX material; immunohistochemical confirmation on lens capsules\",\n      \"journal\": \"Experimental eye research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — two orthogonal methods (MS and IHC) directly identifying LOXL1 protein in disease-relevant deposits, single lab\",\n      \"pmids\": [\"19442659\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"TGF-β1, oxidative stress, UV light, and hypoxia upregulate LOXL1 expression and promote assembly of elastin/microfibrillar networks into PEX-like fibrils in human Tenon fibroblasts; cells carrying the high-risk LOXL1 haplotype show slightly decreased basal and stimulated LOXL1 expression compared to low-risk haplotype cells.\",\n      \"method\": \"Exposure of cultured human Tenon's capsule fibroblasts (high- vs. low-risk LOXL1 haplotypes) to pathogenic stimuli; quantitative real-time PCR, Western blot, immunohistochemistry, electron microscopy\",\n      \"journal\": \"Investigative ophthalmology & visual science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple orthogonal methods in a single lab with genotype-stratified cell cultures\",\n      \"pmids\": [\"21948647\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Loxl1−/− mice show compromise of the blood-aqueous humor barrier (increased fluorescein diffusion into anterior chamber), anterior lens subcapsular vesiculation, and decreased elastin in iris and ciliary body, but no macromolecular deposit accumulation or elevated intraocular pressure, demonstrating that LOXL1 is required for ocular anterior segment integrity and elastin maintenance.\",\n      \"method\": \"Clinical and histological analysis, fluorescein angiography, IOP measurement, and immunohistochemistry in Loxl1 null vs. C57BL control mice\",\n      \"journal\": \"Investigative ophthalmology & visual science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean knockout model with multiple orthogonal phenotypic readouts (angiography, histology, IHC), single lab\",\n      \"pmids\": [\"24425853\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"LOXL1 is a major component of exfoliation (XFS) material, co-localizing with elastin, fibrillin-1, and fibulin-4; LOXL1 expression is upregulated in early XFS anterior eye tissues but downregulated in advanced stages and specifically downregulated in the lamina cribrosa of XFS eyes, where ultrastructural elastic fiber network alterations are observed.\",\n      \"method\": \"Real-time PCR, immunohistochemistry, Western blot, and electron microscopy on human XFS and control eye tissues; in vitro cell stimulation assays\",\n      \"journal\": \"Journal of glaucoma\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple orthogonal methods on human tissue, single lab, findings consistent with prior reports\",\n      \"pmids\": [\"25275906\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"A 7-kb region spanning introns 1-2 of LOXL1 contains an enhancer-like promoter for the antisense lncRNA LOXL1-AS1; XFS risk alleles in this region functionally modulate promoter activity, and LOXL1-AS1 expression is altered by oxidative stress and cyclic mechanical stress in ocular cells.\",\n      \"method\": \"Deep sequencing of LOXL1 locus; luciferase promoter activity assays; multi-population replication; expression analysis in stressed ocular cells\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — functional promoter assays with multi-population replication, but findings concern the lncRNA regulation rather than the LOXL1 protein mechanism directly\",\n      \"pmids\": [\"26307087\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"LOXL1 promoter CpG islands are hypermethylated in lens capsule samples from PEX patients compared to age-related cataract controls, with corresponding reduction in LOXL1 mRNA and protein, indicating epigenetic silencing of LOXL1 in PEX tissue.\",\n      \"method\": \"Pyrosequencing of CpG islands; quantitative real-time PCR and Western blot on lens capsule specimens\",\n      \"journal\": \"Investigative ophthalmology & visual science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — two orthogonal methods on disease tissue, single lab, small sample size (n=10 per group)\",\n      \"pmids\": [\"26348632\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"The PEX-associated coding variants Arg141Leu and Gly153Asp in LOXL1 affect surface electrostatics at likely protein-protein interaction sites and alter processing of secreted LOXL1 protein variants by endogenous proteases (possibly BMP-1), as shown by differential immunoprecipitation of secreted forms from fibroblasts.\",\n      \"method\": \"Molecular modelling; ectopic expression in RFL-6 rat fetal lung fibroblasts; immunoprecipitation of secreted protein variants; immunofluorescence\",\n      \"journal\": \"Experimental eye research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — protein-level functional consequence of coding variants shown by IP, supported by modelling, single lab\",\n      \"pmids\": [\"26997634\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"The rs11638944:C>G transversion in intron 1-2 of LOXL1 exerts a cis-acting effect by (a) differentially modulating binding of transcription factor RXRα and (b) altering alternative splicing of LOXL1, leading to reduced LOXL1 mRNA levels in risk allele carriers.\",\n      \"method\": \"Genome-wide association scan; independent population replication; reporter and transcription factor binding assays; RNA splicing analysis in patient cells and tissues\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — GWAS-guided functional dissection replicated in three independent populations, with transcription factor binding assays and splicing analysis as orthogonal mechanistic evidence\",\n      \"pmids\": [\"28534485\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"LOXL1 specifically crosslinks elastin in the liver: LOXL1 expression coincides with appearance of insoluble/crosslinked elastin only in cirrhosis (not earlier fibrosis stages); AAV-delivered shRNA knockdown of LOXL1 in cirrhotic mice reduces insoluble elastin area by 58% and collagen area by 51%, arresting disease progression.\",\n      \"method\": \"CCl4-induced liver fibrosis/cirrhosis mouse model; AAV2/8 shRNA knockdown; biochemical quantification of crosslinked elastin and collagen; immunolocalization of LOXL1 with α-SMA; in vitro LOXL1 silencing in LX-2 cells\",\n      \"journal\": \"Biochimica et biophysica acta. Molecular basis of disease\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo genetic KD with quantitative biochemical readouts, complemented by in vitro confirmation, single lab but multiple orthogonal methods\",\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 cell proliferation and fibrogenic gene expression (TIMP1, α-SMA, collagen type I) and reduces phosphorylation of Smad2 and Smad3; conversely, Smad2/3 knockdown abolishes proliferation and fibrogenesis driven by LOXL1 overexpression, placing LOXL1 upstream of TGF-β1/Smad2/3 signaling.\",\n      \"method\": \"siRNA knockdown and overexpression in LX-2 cells; Western blot for Smad2/3 phosphorylation; proliferation assays; epistasis by double knockdown\",\n      \"journal\": \"Biomedicine & pharmacotherapy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — genetic epistasis placing LOXL1 in Smad2/3 pathway, single lab\",\n      \"pmids\": [\"30257391\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"LOXL1 expression in cancer-associated fibroblasts is regulated by integrin α11; LOXL1 promotes collagen matrix remodeling and collagen fiber alignment in vitro and in vivo, supporting NSCLC tumor growth in a xenograft model.\",\n      \"method\": \"LOXL1 knockdown and overexpression in CAFs; collagen gel contraction assays; second-harmonic generation microscopy for fiber alignment; NSCLC xenograft tumor growth\",\n      \"journal\": \"Cancers\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — in vitro and in vivo gain/loss-of-function, single lab\",\n      \"pmids\": [\"31121900\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"A non-coding variant rs7173049-G downstream of LOXL1 correlates with allele-specific binding of thyroid hormone receptor beta, increased expression of ISLR2 and STRA6, and a consistent protective effect on PEX risk across nine populations; siRNA-mediated downregulation of retinoic acid signaling (STRA6 pathway) induces upregulation of LOXL1 and PEX-associated matrix genes in ocular cells, placing LOXL1 expression downstream of the RA/STRA6 axis.\",\n      \"method\": \"Deep sequencing; luciferase enhancer assays; transcription factor binding assays; multi-population replication; siRNA knockdown of RA pathway components with LOXL1 expression readout\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — functional enhancer assays plus nine-population genetic replication plus siRNA epistasis demonstrating regulatory pathway, multiple orthogonal methods\",\n      \"pmids\": [\"30986821\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"LOXL1 interacts with BAG2 via a hydrogen bond between LOXL1-D515 and BAG2-K186; LOXL1's lysyl oxidase enzymatic activity prevents ubiquitination of BAG2-K186, thereby stabilizing BAG2 protein and conferring antiapoptotic activity in glioma cells. LOXL1 expression is specifically upregulated through the VEGFR-Src-CEBPA transcriptional axis.\",\n      \"method\": \"Co-immunoprecipitation; structural modeling of interaction; gain/loss-of-function in glioma cells and xenografts; ubiquitination assays; pathway epistasis (VEGFR-Src-CEBPA)\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal IP, mechanistic site identification, and in vivo validation, single lab but multiple orthogonal approaches\",\n      \"pmids\": [\"32424143\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"LOXL1 inhibits colorectal cancer progression by interacting with MST1/2 kinases and increasing their phosphorylation, thereby suppressing YAP transcriptional activity via the Hippo pathway; overexpression of LOXL1 inhibits metastasis and tumor growth in vivo.\",\n      \"method\": \"Co-immunoprecipitation of LOXL1 with MST1/2; Western blot for MST1/2 phosphorylation; colony formation, migration/invasion, and xenograft assays\",\n      \"journal\": \"Cell communication and signaling\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — Co-IP and phosphorylation assay with in vivo validation, single lab\",\n      \"pmids\": [\"32912229\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"LOXL1 silencing in ILC (invasive lobular carcinoma) cell lines decreases tumor growth, invasion, and metastasis in intraductal xenograft models by disrupting ECM structure; this is associated with decreased estrogen receptor (ER) signaling, indicating LOXL1-mediated ECM remodeling supports ER activity in ILC.\",\n      \"method\": \"LOXL1 shRNA knockdown and pan-LOX inhibitor BAPN in ILC intraductal xenograft models; ECM structural analysis; ER signaling readouts\",\n      \"journal\": \"EMBO molecular medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — clean KD with in vivo phenotype and mechanistic linkage to ER signaling, single lab\",\n      \"pmids\": [\"33616307\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Hepatic stellate cell-specific LOXL1 knockout prevents CCl4-induced hepatic fibrosis and inflammation; RNA-seq identifies integrin α8 (ITGA8) as a key upstream regulator; LOXL1 activates the FAK/PI3K/AKT/HIF1α pathway, and HIF1α directly binds the LOXL1 promoter creating a positive feedback loop; FAK or PI3K inhibitors reduce LOXL1 expression.\",\n      \"method\": \"Conditional Loxl1 knockout in HSCs (Loxl1-Gfap-cre mice); RNA sequencing; siRNA silencing of ITGA8; ChIP/promoter binding assays for HIF1α; pharmacological inhibition of FAK/PI3K; fibrosis quantification (Sirius red, hydroxyproline)\",\n      \"journal\": \"FASEB journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — cell-type-specific KO in vivo, RNA-seq pathway discovery, ChIP for direct transcription factor binding, pharmacological epistasis, multiple orthogonal methods in a single rigorous study\",\n      \"pmids\": [\"34569648\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Loxl1-deficient mice develop pelvic organ prolapse with disordered ECM (disarranged collagen and elastic fibers), urinary dysfunction, decreased mechanical properties of pelvic floor, upregulated ECM catabolism gene expression, and elevated inflammatory response, consistent with pathology in human POP patients.\",\n      \"method\": \"Histology, GO/transcriptomic analysis of differentially expressed genes, urodynamic functional testing, and mechanical testing in Loxl1 knockout mice; comparison to human prolapse tissue\",\n      \"journal\": \"Aging\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple phenotypic and molecular readouts in KO model with human tissue comparison, single lab\",\n      \"pmids\": [\"34923484\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"LOXL1 interacts with fibulin-5 (FBLN5), which then binds αvβ3 integrin via an RGD domain, activating FAK-MAPK signaling in vascular endothelial cells to promote angiogenesis in intrahepatic cholangiocarcinoma; LOXL1 overexpression promotes proliferation, colony formation, metastasis, and angiogenesis in vivo and in vitro.\",\n      \"method\": \"Co-immunoprecipitation of LOXL1 with FBLN5; RGD domain-dependent binding assay; Western blot for FAK-MAPK activation; xenograft and angiogenesis assays\",\n      \"journal\": \"Molecular therapy. Nucleic acids\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — Co-IP identifying LOXL1-FBLN5 complex with downstream signaling validation, single lab\",\n      \"pmids\": [\"33614230\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"HSC-specific LOXL1 deficiency in a CDAA diet-induced non-obese NASH model reduces inflammation, fibrosis, and hepatic steatosis and restores adipose tissue function; serum LOXL1 positively correlates with histological fibrosis and inversely with leptin in non-obese NAFLD patients.\",\n      \"method\": \"Conditional HSC-specific Loxl1 knockout mice (Loxl1fl/fl Gfap-cre); CDAA diet NASH model; liver histology and profibrogenic/pro-inflammatory gene expression; correlation analysis in human NAFLD patients\",\n      \"journal\": \"Hepatology international\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — conditional KO in vivo with multiple pathological readouts, single lab, human correlation supporting data\",\n      \"pmids\": [\"34014450\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"LOXL1 gene expression is upregulated ~10-fold in platelet-rich plasma (PRP)-treated immature articular cartilage, correlating with a 5-fold increase in cartilage stiffness measured by atomic force microscopy, suggesting LOXL1-mediated ECM crosslinking contributes to PRP-induced cartilage maturation.\",\n      \"method\": \"In vitro PRP treatment of immature cartilage explants; gene expression profiling; atomic force microscopy for stiffness; BrdU incorporation for proliferation\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — correlation of LOXL1 upregulation with stiffness, no direct manipulation of LOXL1, single lab\",\n      \"pmids\": [\"28623328\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"miR-15b and miR-16 directly bind the 3'-UTR of LOXL1 mRNA and suppress LOXL1 expression in hepatic stellate cells; LOXL1 knockdown attenuates the pro-fibrogenic and pro-proliferative effects of miR-15b/16 downregulation, placing LOXL1 as a downstream effector of miR-15b/16 in TGF-β1-driven fibrosis.\",\n      \"method\": \"3'-UTR luciferase reporter assay; miRNA overexpression and knockdown in LX-2 cells; Western blot for Smad2/3 phosphorylation and fibrogenic markers; epistasis by LOXL1 knockdown in miR-15b/16-depleted cells\",\n      \"journal\": \"Life sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — direct UTR binding validated by reporter assay and epistasis, single lab\",\n      \"pmids\": [\"33545201\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"LOXL1 overexpression in gastric cancer cells promotes epithelial-mesenchymal transition (EMT), reducing CDH1 expression while increasing VIM, CDH2, SNAI2, and PLS3, and enhancing cell migration capacity.\",\n      \"method\": \"LOXL1 overexpression in GC cell lines; Western blot and morphological analysis for EMT markers; migration assay\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — gain-of-function with EMT marker readouts, no mechanistic pathway identification, single lab\",\n      \"pmids\": [\"33095806\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"LOXL1 is an extracellular and nuclear lysyl oxidase family enzyme that crosslinks elastin and collagen in the ECM; it regulates elastic fiber formation and stability (required for blood-aqueous barrier integrity, vaginal tissue mechanics, and liver cirrhosis-stage elastin deposition), modulates intracellular signaling pathways including TGF-β1/Smad2/3, Hippo/MST1/2/YAP, FAK/PI3K/AKT/HIF1α, and Ras/ERK, interacts with BAG2 to prevent its ubiquitination and degradation, binds fibulin-5 to activate αvβ3 integrin/FAK-MAPK-driven angiogenesis, and its expression is regulated by RXRα-mediated transcriptional control, alternative splicing, promoter CpG methylation, miR-15b/16 targeting of its 3'-UTR, and a positive feedback loop through HIF1α.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"LOXL1 is a lysyl oxidase family enzyme that crosslinks elastin and collagen in the extracellular matrix, governing the formation and stability of elastic fiber networks across connective tissues [#3, #13]. Loss of LOXL1 produces global connective-tissue defects: knockout mice show mechanically weaker vaginal and pelvic support tissues, pelvic organ prolapse with disorganized collagen and elastic fibers, and compromised ocular anterior-segment integrity with decreased elastin in iris and ciliary body and breakdown of the blood-aqueous barrier [#3, #7, #21]. In the eye, LOXL1 is a direct structural component of pathological pseudoexfoliation/exfoliation deposits, co-localizing with elastin, fibrillin-1, and fibulin-4 [#5, #8], and its expression is tightly controlled by disease-associated regulatory variants and pathways, including cis-acting modulation of RXRα binding and alternative splicing, a downstream retinoic acid/STRA6 axis, and promoter CpG hypermethylation [#10, #12, #16]. In the liver, LOXL1 crosslinks elastin specifically at the cirrhosis stage, and hepatic stellate cell-specific deletion prevents fibrosis; mechanistically LOXL1 sits upstream of TGF-β1/Smad2/3 signaling and drives a FAK/PI3K/AKT/HIF1α cascade in which HIF1α directly binds the LOXL1 promoter to create a positive feedback loop [#13, #14, #20, #23]. Beyond its canonical ECM role, LOXL1 modulates intracellular signaling in cancer with context-dependent outcomes: it antagonizes Ras/ERK and suppresses YAP through MST1/2-dependent Hippo activation in a tumor-suppressive capacity [#2, #18], while in other contexts it stabilizes the anti-apoptotic factor BAG2 by preventing its ubiquitination and promotes angiogenesis through a fibulin-5/αvβ3 integrin/FAK-MAPK axis [#17, #22]. LOXL1 expression is further regulated by integrin signaling (ITGA8, integrin α11) and by direct targeting of its 3'-UTR by miR-15b/16 [#15, #20, #25].\",\n  \"teleology\": [\n    {\n      \"year\": 1999,\n      \"claim\": \"Established the first hint that LOXL1, unlike LOX, has distinct collagen-substrate associations, raising the question of functional specialization within the lysyl oxidase family.\",\n      \"evidence\": \"Real-time RT-PCR correlating Loxl1 and procollagen mRNAs during CCl4 liver fibrosis in mice\",\n      \"pmids\": [\"10022501\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\n        \"mRNA correlation only; no direct enzymatic or protein-level confirmation of substrate specificity\",\n        \"does not demonstrate crosslinking activity on any substrate\"\n      ]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Mapped where LOXL1 protein resides relative to LOX, showing overlapping and distinct tissue zones and unexpected nuclear localization, broadening the scope of possible LOXL1 functions beyond the ECM.\",\n      \"evidence\": \"Comparative immunohistochemistry across developing mouse tissues\",\n      \"pmids\": [\"15609098\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"nuclear function not defined\",\n        \"localization does not establish a molecular activity\"\n      ]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Demonstrated that LOXL1 is required for the mechanical integrity of connective tissues, directly linking the enzyme to ECM crosslinking-dependent tissue strength.\",\n      \"evidence\": \"Biomechanical tensile testing of vaginal tissue in Loxl1-/- vs wild-type mice; IHC and RT-PCR across rat aorta aging\",\n      \"pmids\": [\"18265927\", \"18803461\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"molecular crosslink substrates not biochemically quantified in these assays\",\n        \"tissue-level phenotype does not isolate elastin vs collagen contribution\"\n      ]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Identified LOXL1 as a direct physical constituent of pseudoexfoliation deposits, connecting the crosslinking enzyme to a defined human ocular pathology.\",\n      \"evidence\": \"Mass spectrometry of surgically isolated PEX material with IHC confirmation\",\n      \"pmids\": [\"19442659\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"does not establish whether LOXL1 enzymatic activity drives deposit formation\",\n        \"causality between LOXL1 and PEX assembly not tested\"\n      ]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Showed environmental and cytokine stimuli (TGF-β1, oxidative stress, UV, hypoxia) induce LOXL1 and PEX-like fibril assembly, and that risk haplotypes alter LOXL1 expression, linking genetic risk to a stress-responsive matrix phenotype.\",\n      \"evidence\": \"Genotype-stratified human Tenon fibroblast cultures with qPCR, Western, IHC, EM\",\n      \"pmids\": [\"21948647\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"modest expression differences between haplotypes\",\n        \"causal link from expression change to fibril phenotype not isolated\"\n      ]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Defined the in vivo ocular requirement for LOXL1 in blood-aqueous barrier and elastin maintenance, and confirmed LOXL1 as a major XFS deposit component co-localizing with elastic fiber proteins.\",\n      \"evidence\": \"Loxl1 null mouse clinical/histological analysis and fluorescein angiography; human XFS tissue PCR/IHC/Western/EM\",\n      \"pmids\": [\"24425853\", \"25275906\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"absence of IOP elevation leaves glaucoma mechanism unexplained\",\n        \"stage-dependent up- then down-regulation of LOXL1 in disease not mechanistically resolved\"\n      ]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Localized PEX risk to non-coding regulatory elements at the LOXL1 locus, showing risk alleles modulate promoter activity and an antisense lncRNA, and that the locus is epigenetically silenced in disease tissue.\",\n      \"evidence\": \"Deep sequencing, luciferase promoter assays, multi-population replication; pyrosequencing of CpG islands in lens capsule\",\n      \"pmids\": [\"26307087\", \"26348632\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"lncRNA mechanism on LOXL1 protein function not established\",\n        \"small sample size for methylation analysis\"\n      ]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Demonstrated that PEX coding variants alter LOXL1 surface electrostatics and protease processing of secreted protein, providing a protein-level mechanism for genetic risk.\",\n      \"evidence\": \"Molecular modelling and immunoprecipitation of secreted LOXL1 variants from fibroblasts\",\n      \"pmids\": [\"26997634\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"BMP-1 as processing protease only inferred\",\n        \"functional consequence for crosslinking activity not measured\"\n      ]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Pinpointed a causal cis-regulatory variant acting through RXRα binding and alternative splicing to reduce LOXL1 expression, establishing the molecular basis of the LOXL1 PEX association.\",\n      \"evidence\": \"GWAS with three-population replication, reporter and TF-binding assays, splicing analysis in patient tissues; cartilage stiffness correlation study\",\n      \"pmids\": [\"28534485\", \"28623328\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"tissue-specific splicing outcomes not fully enumerated\",\n        \"cartilage stiffness link is correlative without LOXL1 manipulation\"\n      ]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Established LOXL1 as a stage-specific elastin crosslinker in liver cirrhosis whose knockdown arrests disease, and placed LOXL1 upstream of TGF-β1/Smad2/3 fibrogenic signaling.\",\n      \"evidence\": \"CCl4 cirrhosis model with AAV shRNA knockdown and biochemical crosslink quantification; siRNA/overexpression epistasis in LX-2 cells\",\n      \"pmids\": [\"29366776\", \"30257391\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"how an extracellular enzyme modulates intracellular Smad phosphorylation not mechanistically resolved\",\n        \"direct enzymatic crosslinking of elastin vs indirect signaling effects not fully separated\"\n      ]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Showed LOXL1 functions in tumor stroma, regulated by integrins, to remodel and align collagen and support tumor growth, and that it can drive EMT in epithelial tumor cells.\",\n      \"evidence\": \"LOXL1 knockdown/overexpression in CAFs with SHG microscopy and NSCLC xenografts; LOXL1 overexpression and EMT markers in gastric cancer cells\",\n      \"pmids\": [\"31121900\", \"33095806\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"EMT effect lacks defined mechanistic pathway\",\n        \"integrin α11 to LOXL1 regulatory link not fully dissected\"\n      ]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Revealed two intracellular signaling roles for LOXL1 in cancer: enzymatic stabilization of BAG2 via blocking its ubiquitination (anti-apoptotic) and MST1/2-dependent Hippo activation suppressing YAP (tumor-suppressive).\",\n      \"evidence\": \"Co-IP, interaction-site modeling, ubiquitination assays, and xenografts in glioma; Co-IP with MST1/2 and phosphorylation/xenograft assays in colorectal cancer\",\n      \"pmids\": [\"32424143\", \"32912229\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"opposing tumor-suppressive vs pro-survival roles not reconciled across tissues\",\n        \"single-lab Co-IP findings for each interaction\"\n      ]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Defined a hepatic stellate cell autonomous LOXL1 fibrosis circuit (ITGA8 → FAK/PI3K/AKT/HIF1α with HIF1α-driven positive feedback), additional regulatory inputs (miR-15b/16, RA/STRA6, rs7173049), and broader roles in angiogenesis, ECM-supported ER signaling, and NASH.\",\n      \"evidence\": \"HSC-specific conditional Loxl1 knockout with RNA-seq, ChIP, and pharmacological epistasis; miRNA 3'-UTR reporter; multi-population enhancer/TF-binding assays; FBLN5 Co-IP; ILC and NASH models\",\n      \"pmids\": [\"34569648\", \"33545201\", \"30986821\", \"33614230\", \"33616307\", \"34923484\", \"34014450\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\n        \"integration of the many parallel signaling and regulatory axes into one model is incomplete\",\n        \"relative contribution of enzymatic crosslinking vs signaling adaptor roles unresolved\"\n      ]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How a primarily extracellular crosslinking enzyme exerts the diverse intracellular signaling effects attributed to it (Smad2/3, Hippo, BAG2 stabilization, FAK/HIF1α) and the function of its reported nuclear pool remain unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\n        \"no structural or biochemical mechanism linking secreted LOXL1 to intracellular kinase pathways\",\n        \"nuclear LOXL1 function uncharacterized\",\n        \"no reconstituted enzymatic assay defining elastin vs collagen substrate preference\"\n      ]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0016491\", \"supporting_discovery_ids\": [13, 17]},\n      {\"term_id\": \"GO:0140096\", \"supporting_discovery_ids\": [17]},\n      {\"term_id\": \"GO:0005198\", \"supporting_discovery_ids\": [3, 13, 21]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005576\", \"supporting_discovery_ids\": [5, 8, 11]},\n      {\"term_id\": \"GO:0031012\", \"supporting_discovery_ids\": [13, 15, 21]},\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [1]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-1474244\", \"supporting_discovery_ids\": [13, 15, 21]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [14, 18, 20, 22]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [5, 8, 13, 21]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\n      \"BAG2\",\n      \"MST1\",\n      \"MST2\",\n      \"FBLN5\"\n    ],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"tie","faith_supported":6,"faith_total":6,"faith_pct":100.0}}