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Uncoupling of T Cell Receptor Zeta Chain Function during the Induction of Anergy by the Superantigen, Staphylococcal Enterotoxin A

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Author(s): William D. Cornwell | Thomas J. Rogers

Journal: Toxins
ISSN 2072-6651

Volume: 2;
Issue: 7;
Start page: 1704;
Date: 2010;
Original page

Keywords: superantigen | Staphylococcus aureus | SEA | anergy | zeta chain | enterotoxin

ABSTRACT
Staphylococcus aureus enterotoxins have immunomodulatory properties. In this study, we show that Staphylococcal enterotoxin A (SEA) induces a strong proliferative response in a murine T cell clone independent of MHC class II bearing cells. SEA stimulation also induces a state of hypo-responsiveness (anergy). We characterized the components of the T cell receptor (TCR) during induction of anergy by SEA. Most interestingly, TCR zeta chain phosphorylation was absent under SEA anergizing conditions, which suggests an uncoupling of zeta chain function. We characterize here a model system for studying anergy in the absence of confounding costimulatory signals.