期刊
NEUROSCIENCE LETTERS
卷 442, 期 2, 页码 96-99出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.neulet.2008.06.073
关键词
Bcl-X-L; Bax; calcium; apoptosis; mitochondria; respiratory chain; ATP; ADP; cell death
资金
- NIH [NS40932]
- Funda Ao do Amparo A Pesquisa do Estado de SAo Paulo (FAPESP)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
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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