ArticleJournal of gastroenterology and hepatology2026
Integrated Transcriptomic Analysis and Machine Learning Identify THY1 as a Key Regulator of Cancer-Associated Fibroblast Infiltration, Promoting Malignant Progression and Immune Escape in Gastric Cancer.
Article in Journal of gastroenterology and hepatology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundHeterogeneity in cancer-associated fibroblast (CAF) infiltration within the tumor microenvironment is closely associated with gastric cancer progression and immune evasion; however, precise CAF-related diagnostic markers and actionable therapeutic targets remain scarce.
methodsWeighted gene coexpression network analysis (WGCNA) was employed to screen CAF-related coexpression modules. Gastric cancer samples were stratified into molecular subtypes via nonnegative matrix factorization (NMF). Core genes were screened using LASSO regression, SVM-RFE, and RF. Functional assays (Western blot, CCK-8, colony formation, Transwell, tube formation, ELISA, and flow cytometry) were conducted to assess THY1's role in CAF activation and effects on tumor/immune cells.
resultsWGCNA identified modules correlated with CAF abundance, yielding 417 hub genes. NMF classified gastric cancer into two molecular subtypes with distinct differences in immune microenvironment, drug sensitivity, and pathway activity. Four core genes (THY1, VASH1, CHSY3, and CDH11) were consistently identified. The nomogram model demonstrated strong diagnostic performance for discriminating gastric cancer from normal tissue (AUC = 0.907 in the discovery cohort and > 0.85 in the validation cohort), with calibration and decision curve analysis (DCA) supporting clinical utility. THY1 knockdown in CAFs downregulated activation markers. Conditioned medium of THY1-deficient CAFs reduced cell proliferation and invasion, inhibited HUVEC tube formation, enhanced CD8
conclusionCAF-derived THY1 promoted malignant phenotypes and immune evasion by modulating CAF function and paracrine cross talk with tumor cells, endothelial cells, and CD8
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