ER stress upregulates S100A11 in steatohepatitis models via epigenetic modifications within the lipotoxicity-influenced enhancer.

ABSTRACT: Metabolic dysfunction-associated steatohepatitis (MASH) is a progressive liver disease characterized by complex interactions between lipotoxicity, ER stress responses, and immune-mediated inflammation. We identified enrichment of the proinflammatory alarmin S100 calcium-binding protein A11 (S100A11) on extracellular vesicles stimulated by palmitate-induced lipotoxic ER stress with concomitant upregulation of hepatocellular S100A11 abundance in an IRE1A-XBP1s-dependent manner. We next investigated the epigenetic mechanisms that regulate this stress response. Publicly available human liver ChIP-Seq GEO datasets demonstrated a region of histone H3 lysine 27 (H3K27) acetylation upstream of the S100A11 promoter. H3K27 acetylation ChIP-qPCR demonstrated a positive correlation between lipotoxic E

SUBMITTER: Daniel PV 

PROVIDER: S-EPMC12646672 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature