Inhibition of Histone Deacetylases Induces Cancer Cell Apoptosis Through the PERK Pathway of ER Stress Response.

ABSTRACT: Activation of the endoplasmic reticulum (ER) stress is an adaptive response to disturbed ER homeostasis caused by the accumulation of misfolded or unfolded proteins, or an acute increase in the entry of newly synthesised or mutated proteins into the ER lumen. Overwhelmed or prolonged ER stress causes apoptotic cell death or a maladaptive state of the cell, resulting in various pathological diseases including cancer, inflammation and aging. With a screening of a chemical compound library, here we show that inhibition of histone deacetylases (HDACs) induces ER stress, along with increased retro-translocation of misfolded proteins from the ER lumen to the cytosol for proteasomal degradation. HDAC inhibitors (HDACi) activate the PERK-eIF2α subbranch of the unfolded protein response (UPR), wher

SUBMITTER: Wang X 

PROVIDER: S-EPMC12571189 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature