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Updated: May 27, 2026

Use of Single Chain MHC Technology to Investigate Co-agonism in Human CD8+ T Cell Activation
Published on: February 28, 2019
Uncoupling of T cell receptor zeta chain function during the induction of anergy by the superantigen, staphylococcal
William D Cornwell1, Thomas J Rogers
1FELS Institute, Temple University School of Medicine, 3307 North Broad Street, Philadelphia, PA 19140, USA. cornwell@temple.edu
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.
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