alexa The role of dynamin-related protein 1, a mediator of mitochondrial fission, in apoptosis
Diabetes & Endocrinology

Diabetes & Endocrinology

Journal of Metabolic Syndrome

Author(s): Frank S, Gaume B, BergmannLeitner ES, Leitner WW, Robert EG

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In healthy cells, fusion and fission events participate in regulating mitochondrial morphology. Disintegration of the mitochondrial reticulum into multiple punctiform organelles during apoptosis led us to examine the role of Drp1, a dynamin-related protein that mediates outer mitochondrial membrane fission. Upon induction of apoptosis, Drp1 translocates from the cytosol to mitochondria, where it preferentially localizes to potential sites of organelle division. Inhibition of Drp1 by overexpression of a dominant-negative mutant counteracts the conversion to a punctiform mitochondrial phenotype, prevents the loss of the mitochondrial membrane potential and the release of cytochrome c, and reveals a reproducible swelling of the organelles. Remarkably, inhibition of Drp1 blocks cell death, implicating mitochondrial fission as an important step in apoptosis.

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This article was published in Dev Cell and referenced in Journal of Metabolic Syndrome

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