alexa Intersection between mitochondrial permeability pores and mitochondrial fusion fission.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Genetic Syndromes & Gene Therapy

Author(s): Gazaryan IG, Brown AM

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Abstract The goal of this review is to highlight recent developments in the field of mitochondrial membrane processes, which provide new insights into the relation between mitochondrial fission/fusion events and the mitochondrial permeability transition (MPT). First, we distinguish between pore opening events at the inner and outer mitochondrial membranes. Inner membrane pore opening, or iMPT, leads to membrane depolarization, release of low molecular weight compounds, cristae reorganization and matrix swelling. Outer membrane pore opening, or oMPT, allows partial release of apoptotic proteins, while complete release requires additional remodeling of inner membrane cristae. Second, we summarize recent data that supports a similar temporal and physical separation between inner and outer mitochondrial membrane fusion events. Finally, we focus on cristae remodeling, which may be the intersection between oMPT and iMPT events. Interestingly, components of fusion machinery, such as mitofusin 2 and OPA1, appear to play a role in cristae remodeling as well. This article was published in Neurochem Res and referenced in Journal of Genetic Syndromes & Gene Therapy

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