Bcl-X-L inhibits Bax-induced alterations in mitochondrial respiration and calcium release
Data
2008-09-12
Autores
Teles, Alessandra Vaz Fernandes Fiuza 
Ureshino, Rodrigo Portes
Dorta, Daniel Junqueira
Lopes, Guiomar Silva
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Apoptosis is a natural cell elimination process involved in a number of physiological and pathological events. This process can be regulated by members of the Bcl-2 family. Bax, a pro-apoptotic member of this family, accelerates cell death, while the pro-survival member, Bcl-X-L, can antagonize the pro-apoptotic function of Bax to promote cell survival. in the present study, we have evaluated the effect of Bcl-X-L on Bax-induced alterations in mitochondrial. respiration and calcium release. We found that in primary cultured astrocytes, recombinant Bcl-X-L is able to antagonize Bax-induced decrease in mitochondrial respiration and increase in mitochondrial. calcium release. in addition, we found that Bcl-X-L can lower the calcium store in the endoplasmic reticulum, thus limiting potential calcium flux induced by apoptosis. This regulation of calcium flux by Bcl-X-L may represent an important mechanism by which this protein promotes cell survival. (c) 2008 Elsevier Ireland Ltd. All rights reserved.
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Neuroscience Letters. Clare: Elsevier B.V., v. 442, n. 2, p. 96-99, 2008.