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Role of Mitofusins and Mitophagy in Life or Death Decisions

Mariana Joaquim1, Mafalda Escobar-Henriques1

  • 1Institute for Genetics, Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany.

Frontiers in Cell and Developmental Biology
|October 19, 2020
PubMed

Insights

Mitofusins and mitophagy are crucial for maintaining healthy mitochondria and cellular function. This review explores their roles in life-death decisions and non-alcoholic fatty liver disease.

Area of Science:

  • Cell Biology
  • Mitochondrial Dynamics
  • Organelle Quality Control

Background:

  • Mitochondria exhibit dynamic morphological changes influencing cell death pathways and organelle turnover.
  • Mitophagy, the selective elimination of damaged mitochondria, is vital for maintaining mitochondrial network health, especially during aging.
  • Mitofusins, located on the outer mitochondrial membrane, regulate mitochondrial fusion and interconnectivity.

Purpose of the Study:

  • To review the critical roles of mitofusins and mitophagy at the intersection of cell survival and apoptosis.
  • To highlight the involvement of mitofusin 2 and mitophagy in the pathogenesis of non-alcoholic fatty liver disease.

Main Methods:

  • Literature review of studies on mitochondrial dynamics, mitophagy, and apoptosis.
  • Analysis of the regulatory functions of mitofusins, particularly mitofusin 2.
  • Focus on the impact of these processes in the context of non-alcoholic fatty liver disease.

Main Results:

  • Mitofusins integrate cellular signals, influencing mitochondrial morphology and function.
  • Mitofusin 2 mediates mitochondrial-endoplasmic reticulum contacts and serves as a platform for mitophagy and apoptosis.
  • Dysregulation of mitofusins and mitophagy is implicated in cellular dysfunction and disease progression.

Conclusions:

  • Mitofusins and mitophagy are key regulators balancing cell life and death decisions.
  • Mitofusin 2 and mitophagy play significant roles in the development and progression of non-alcoholic fatty liver disease.
  • Understanding this interplay offers potential therapeutic targets for metabolic liver diseases.
Keywords:
MFN2NAFLDapoptosismitochondriamitofusinsmitophagy

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