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Osmotic stress sensitizes naturally resistant cells to TNF-alpha-induced apoptosis.
Franco, D L; Nojek, I M; Molinero, L; Coso, O A; Costas, M A.
Afiliación
  • Franco DL; Laboratorio de Fisiología y Biología Molecular, Departamento de Cs. Biológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, C1428EHA Bs. As., Argentina.
Cell Death Differ ; 9(10): 1090-8, 2002 Oct.
Article en En | MEDLINE | ID: mdl-12232797
Most cells are naturally resistant to TNF-alpha-induced cell death and become sensitized when NF-kappaB transactivation is blocked or in the presence of protein synthesis inhibitors that prevent the expression of anti-apoptotic genes. In this report we analyzed the role of osmotic stress on TNF-alpha-induced cell death. We found that it sensitizes the naturally resistant HeLa cells to TNF-alpha-induced apoptosis, with the involvement of an increase in the activity of several kinases, the inhibition of Bcl-2 expression, and a late increase on NF-kappaB activation. Cell death occurs regardless of the enhanced NF-kappaB activity, whose inhibition produces an increase in apoptosis. The inhibition of p38 kinase, also involved in NF-kappaB activation, significantly increases the effect of osmotic stress on TNF-alpha-induced cell death.
Asunto(s)
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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estrés Fisiológico / FN-kappa B / Factor de Necrosis Tumoral alfa / Apoptosis / Sistema de Señalización de MAP Quinasas / Células Eucariotas Límite: Humans Idioma: En Revista: Cell Death Differ Año: 2002 Tipo del documento: Article País de afiliación: Argentina Pais de publicación: Reino Unido
Buscar en Google
Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Estrés Fisiológico / FN-kappa B / Factor de Necrosis Tumoral alfa / Apoptosis / Sistema de Señalización de MAP Quinasas / Células Eucariotas Límite: Humans Idioma: En Revista: Cell Death Differ Año: 2002 Tipo del documento: Article País de afiliación: Argentina Pais de publicación: Reino Unido