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Science 13 July 1990:
Vol. 249. no. 4965, pp. 171 - 174
DOI: 10.1126/science.2164711
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Articles

Science, Vol 249, Issue 4965, 171-174
Copyright © 1990 by American Association for the Advancement of Science

articles

Activation of polyphosphoinositide hydrolysis in T cells by H-2 alloantigen but not MLS determinants

AM O'Rourke, MF Mescher, and Webb SR

Division of Membrane Biology, Medical Biology Institute, La Jolla, CA 92037.

Murine minor lymphocyte-stimulating (Mls) determinants are cell surface antigens that stimulate strong primary T cell responses; the responding T cells display restricted T cell receptor (TCR) V beta gene usage. Interaction of T cells with mitogens or major histocompatibility complex (MHC) antigens activated the polyphosphoinositide (PI) signaling pathway, but this pathway was not triggered by Mls recognition. However, interleukin-2 (IL-2) secretion and proliferation to all three stimuli were comparable. Thus, although recognition of both allo-H-2 and Mls determinants is thought to be mediated by the TCR, these antigens appear to elicit biochemically distinct signal transduction pathways.


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