Navegando por Palavras-chave "Bcl-X-L"

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    Bcl-X-L inhibits Bax-induced alterations in mitochondrial respiration and calcium release
    (Elsevier B.V., 2008-09-12) Teles, Alessandra Vaz Fernandes Fiuza [UNIFESP]; Ureshino, Rodrigo Portes [UNIFESP]; Dorta, Daniel Junqueira [UNIFESP]; Lopes, Guiomar Silva [UNIFESP]; Hsu, Yi-Te; Smaili, Soraya Soubhi [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Med Univ S Carolina
    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.