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Updated: May 9, 2026

Assessment of Mitochondrial Fission/Fusion Dynamics in Kidney Proximal Tubular Cells
Published on: November 14, 2025
miR-761 regulates the mitochondrial network by targeting mitochondrial fission factor
1Division of Cardiovascular Research, State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
Abstract:
Mitochondria are dynamic organelles that constantly undergo fission and fusion. The balance between fission and fusion determines the fate of the cell. In this study, we show that mitochondrial fission factor (MFF) is upregulated upon hydrogen peroxide treatment or ischemia/reperfusion (I/R) injury. Knockdown of MFF attenuated hydrogen peroxide- and I/R injury-induced cardiomyocyte apoptosis and myocardial infarction. We found that MFF is a direct target of miR-761, and miR-761 inhibits mitochondrial fission and cardiomyocyte apoptosis by repressing MFF. This study reveals a novel model of mitochondrial fission regulation, which is composed of miR-761 and MFF. Modulation of their levels may provide a new approach for tackling apoptosis and myocardial infarction.
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