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Control of mitochondrial physiology and cell death by the Bcl-2 family proteins Bax and Bok.

Abstract：

:Neuronal cell death is often triggered by events that involve intracellular increases in Ca2+. Under resting conditions, the intracellular Ca2+ concentration is tightly controlled by a number of extrusion and sequestering mechanisms involving the plasma membrane, mitochondria, and ER. These mechanisms act to prevent a disruption of neuronal ion homeostasis. As these processes require ATP, excessive Ca2+ overloading may cause energy depletion, mitochondrial dysfunction, and may eventually lead to Ca2+-dependent cell death. Excessive Ca2+ entry though glutamate receptors (excitotoxicity) has been implicated in several neurologic and chronic neurodegenerative diseases, including ischemic stroke, epilepsy, and Alzheimer's disease. Recent evidence has revealed that excitotoxic cell death is regulated by the B-cell lymphoma-2 (Bcl-2) family of proteins. Bcl-2 proteins, comprising of both pro-apoptotic and anti-apoptotic members, have been shown to not only mediate the intrinsic apoptosis pathway by controlling mitochondrial outer membrane (MOM) integrity, but to also control neuronal Ca2+ homeostasis and energetics. In this review, the role of Bcl-2 family proteins in the regulation of apoptosis, their expression in the central nervous system and how they control Ca2+-dependent neuronal injury are summarized. We review the current knowledge on Bcl-2 family proteins in the regulation of mitochondrial function and bioenergetics, including the fusion and fission machinery, and their role in Ca2+ homeostasis regulation at the mitochondria and ER. Specifically, we discuss how the 'pro-apoptotic' Bcl-2 family proteins, Bax and Bok, physiologically expressed in the nervous system, regulate such 'non-apoptotic/daytime' functions.

journal_name

Neurochem Int

journal_title

Neurochemistry international

authors

D'Orsi B,Mateyka J,Prehn JHM

doi

10.1016/j.neuint.2017.03.010

subject

Has Abstract

pub_date

2017-10-01 00:00:00

pages

162-170

eissn

0197-0186

issn

1872-9754

pii

S0197-0186(17)30036-0

journal_volume

109

pub_type

杂志文章,评审

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