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FEBS Lett. 2009 Jan 5;583(1):61-9. doi: 10.1016/j.febslet.2008.11.042. Epub 2008 Dec 6.

Regulation of growth and survival of activated T cells by cell-transducing inhibitors of Ras.

Author information

1
Biochemical Pharmacology, William Harvey Research Institute, Queen Mary's School of Medicine and Dentistry, London, United Kingdom.

Abstract

We describe the development of cell-penetrating inhibitors of Ras and study their ability to inhibit T cell activation. The inhibitors transduced T cells in a time and concentration-dependent manner and interacted with endogenous Ras. Anti-CD3/CD28-activated cells when treated with the inhibitors, exhibited a notable reduction in cell size, diminished proliferative capacity, and were more prone to apoptosis. Similarly, lymphocytes activated by antigen in vivo, exhibited accelerated apoptosis when treated with the inhibitors ex vivo. Our data reveal a pro-survival role for Ras in activated primary T cells and describe a new methodology for regulating its activity.

PMID:
19063885
PMCID:
PMC2615550
DOI:
10.1016/j.febslet.2008.11.042
[Indexed for MEDLINE]
Free PMC Article

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