6533b86dfe1ef96bd12caa82
RESEARCH PRODUCT
Rho prevents apoptosis through Bcl-2 expression: Implications for interleukin-2 receptor signal transduction
Carlos Martínez-aMurielle GiryJavier GómezAngelita RebolloAlphonse Garciasubject
RHOAImmunologyDown-RegulationClostridium difficile toxin AApoptosisClostridium difficile toxin BTransfectionCell LineMicePhosphatidylinositol 3-Kinaseschemistry.chemical_compoundGTP-Binding ProteinsAnimalsHumansImmunology and AllergyPhosphatidylinositolProtein kinase AProtein Kinase CbiologyKinaseInterleukinReceptors Interleukin-2Molecular biologyCell biologyProto-Oncogene Proteins c-bcl-2chemistrybiology.proteinInterleukin-2Signal transductionrhoA GTP-Binding ProteinSignal Transductiondescription
Here we describe a Rho-mediated apoptosis suppression pathway driven by Bcl-2 expression in the interleukin (IL)-4- or IL-2-dependent murine T cell line TS1 alpha beta. IL-2, but not IL-4, induces Bcl-2 expression through RhoA activation which is inhibited by the specific Rho family inhibitor, Clostridium difficile Toxin B, as well as by a dominant negative RhoA mutant. Using transient transfections of RhoA mutants tagged with the vesicular stomatitis virus glycoprotein, we show that a constitutively active RhoA mutant induces Bcl-2 expression and prevents apoptosis upon IL-4 withdrawal. Finally, we have identified the signaling pathway involved together with RhoA in Bcl-2 induction and show compelling evidence for the implication of phosphatidylinositol 3 kinase and protein kinase C.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1997-12-12 | European Journal of Immunology |