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© Research
Publication : European journal of immunology

Ras activation leads to cell proliferation or apoptotic cell death upon interleukin-2 stimulation or lymphokine deprivation, respectively

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in European journal of immunology - 01 Jul 1997

Gómez J, Martínez C, Fernández B, García A, Rebollo A

Link to Pubmed [PMID] – 9247568

Eur. J. Immunol. 1997 Jul;27(7):1610-8

Lymphokine-dependent cells undergo apoptosis upon lymphokine withdrawal. We describe that lymphokine deprivation of the interleukin (IL)-2- or IL-4-dependent mouse T cell line TS1 alpha beta induces Ras activation which plays a role in programmed cell death, since blocking Ras activity reduces the induction of apoptosis. Induction of apoptosis by lymphokine deprivation can be prevented by expression of the Bcl-2 protein. Rescue from cell death by IL-2 also promotes Ras activation, but, in contrast to lymphokine withdrawal, stimulates Bcl-2 expression. IL-4-induced cell survival is Ras- and Bcl-2 independent. These results are compatible with a model in which cell proliferation requires the simultaneous induction of at least two pathways which act in combination to prevent cell death.

http://www.ncbi.nlm.nih.gov/pubmed/9247568