Mitochondrial dysfunction in MASH: Focusing on chronic inflammation and intercellular communication

Area of Science:

• Hepatology
• Mitochondrial Biology
• Immunology

Background:

• Metabolic dysfunction-associated steatotic liver disease (MASLD) is a growing health concern linked to metabolic issues.
• Its advanced stage, metabolic dysfunction-associated steatohepatitis (MASH), involves hepatocyte injury, lipotoxicity, and inflammation.
• Mitochondrial dysfunction is a key feature of MASH, contributing to disease progression.

Purpose of the Study:

• To review the link between mitochondrial dysfunction and intrahepatic inflammation in MASH/MASLD.
• To examine the role of intercellular communication, especially extracellular vesicles (EVs), in MASH pathophysiology.
• To highlight mitochondria as a potential therapeutic target for MASH.

Main Methods:

• Literature review synthesizing current research on MASH/MASLD.
• Analysis of the mechanisms connecting mitochondrial dysfunction to inflammation.
• Evaluation of the role of extracellular vesicles in MASH pathogenesis.

Main Results:

• Mitochondrial dysfunction, including mtROS production, triggers inflammatory responses in MASH.
• Mitochondrial damage-associated molecules activate inflammatory cells like neutrophils.
• Neutrophil extracellular traps (NETs) exacerbate liver inflammation and MASH progression.
• Extracellular vesicles (EVs) are critical mediators of intercellular communication in MASH.

Conclusions:

• Mitochondrial dysfunction is intrinsically linked to chronic inflammation in MASH/MASLD.
• Intercellular communication via EVs plays a significant role in MASH progression.
• Targeting mitochondrial dysfunction presents a promising therapeutic avenue for MASH treatment.