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Correspondence to: Ronald H. Schwartz
Recombinant-activating gene 2 (RAG-2-/-) T cell receptortransgenic mice repeatedly injected with the superantigen staphylococcal enterotoxin A entered a tolerant state in which splenic CD4+ T cells produced little interleukin (IL)-2, interferon
, or IL-4. This state resulted from a combination of both clonal anergy and cytokine-mediated immunosuppression. The anergy persisted for at least 3 wk and could be distinguished from the suppression by a decrease in IL-2 production per cell, a block in the activation of early response kinases, and a failure to be reversed with antitransforming growth factor (TGF)-ß. Full suppression lasted for only 1 wk and involved both IL-10 and TGF-ß, but required additional unknown molecules for optimal effect. These experiments show that complex in vivo interactions of multiple peripheral tolerance mechanisms can now be dissected at both the cellular and molecular levels.
Key Words: CD4+ T cell receptor transgenic cells, early response kinase activation, interleukin 2, interleukin 10, transforming growth factor ß
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