Hepatocyte endoplasmic reticulum integrity

Hepatocyte endoplasmic reticulum (ER) integrity refers to the structural and functional stability of the ER within liver cells, which is essential for maintaining cellular proteostasis, lipid metabolism, and calcium regulation. As the primary site for the synthesis of secreted proteins and the metabolism of xenobiotics, the hepatocyte ER is highly sensitive to metabolic demands and toxic insults. Disruption of ER integrity leads to 'ER stress,' a pathological state characterized by the accumulation of unfolded or misfolded proteins and the subsequent activation of the Unfolded Protein Response (UPR). Chronic loss of ER integrity is a key driver in the progression of various liver diseases, including non-alcoholic fatty liver disease (NAFLD), non-alcoholic steatohepatitis (NASH), and drug-induced liver injury (DILI). While it is not a single molecular target like a receptor or enzyme, maintaining or restoring ER integrity is a major therapeutic objective, often addressed using chemical chaperones or modulators of the UPR pathway to prevent hepatocyte apoptosis and liver fibrosis.

Other names

Hepatocyte ER homeostasisEndoplasmic reticulum stress responseER healthLiver ER integrityProteostasis

Restoration of ER proteostasis through chemical chaperoning to assist protein folding or through the modulation of the Unfolded Protein Response (UPR) to increase the cell's adaptive capacity and prevent apoptosis.