Endoplasmic reticulum stress and liver diseases

Area of Science:

• Cellular Biology
• Hepatology
• Molecular Medicine

Background:

• Endoplasmic reticulum (ER) stress arises from disruptions in cellular homeostasis, such as misfolded protein accumulation or calcium depletion.
• The unfolded protein response (UPR), involving IRE1α, PERK, and ATF6 pathways, is a cellular defense mechanism against ER stress, but can lead to cell death if prolonged.
• The liver's high metabolic activity makes it particularly vulnerable to ER stress, which plays a significant role in various liver pathologies.

Purpose of the Study:

• To review the role of ER stress and UPR in the pathogenesis of liver diseases.
• To highlight the mechanisms underlying ER stress induction and UPR involvement in liver disease development.
• To identify ER stress and UPR components as potential therapeutic targets for liver diseases.

Main Methods:

• Review of existing human liver samples and animal disease models.
• Analysis of extensive investigations into the mechanisms of ER stress induction.
• Examination of the contribution of UPR pathways in liver disease development.

Main Results:

• ER stress and UPR signaling are crucial in the pathogenesis of diverse liver diseases, including NAFLD, alcoholic liver disease, and HCC.
• Underlying mechanisms of ER stress induction and UPR activation in liver disease have been elucidated.
• ER stress and UPR proteins/genes represent emerging therapeutic targets for liver disease treatment.

Conclusions:

• ER stress and UPR are central players in the development of numerous liver diseases.
• Targeting ER stress and UPR pathways holds promise for novel therapeutic strategies in hepatology.
• Further research into ER stress modulation could lead to effective treatments for liver conditions.