Reposted by Julien Vibert (李满山)
Online Now: Chromatin accessibility trajectories reveal pre-cancerous epigenetic priming and an acid-driven immunotherapy-resistant gastric cancer subtype
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Chromatin accessibility trajectories reveal pre-cancerous epigenetic priming and an acid-driven immunotherapy-resistant gastric cancer subtype
Wang et al. build a chromatin accessibility atlas of 650 gastric tissue samples spanning pre-cancer to advanced cancer, revealing a cancer-like epigenetic priming state in metaplasia that licenses tumor initiation. Advanced cancers segregate into three epigenomic subtypes; the pseudo-gastric subtype resists immunotherapy via FOSL2-driven H+/K+ ATPase expression that acidifies the microenvironment and suppresses CD8+ T cells—a phenotype reversed by the acid blocker vonoprazan.