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Brief Definitive Report |
goldfeld{at}cbr.med.harvard.edu
Tumor necrosis factor
(TNF-
) is the key mediator of superantigen-induced T cell lethal shock. Here, we show that nuclear factor of activated T cells transcription factor, NFATp, controls susceptibility to superantigen-induced lethal shock in mice through its activation of TNF-
gene transcription. In NFATp-deficient mice, T cell stimulation leads to delayed induction and attenuation of TNF-
mRNA levels, decreased TNF-
serum levels, and resistance to superantigen-induced lethal shock. By contrast, after lipopolysaccharide (LPS) challenge, serum levels of TNF-
and susceptibility to shock are unaffected. These results demonstrate that NFATp is an essential activator of immediate early TNF-
gene expression in T cells and they present in vivo evidence of the inducer- and cell type–specific regulation of TNF-
gene expression. Furthermore, they suggest NFATp as a potential selective target in the treatment of superantigen-induced lethal shock.
Key Words: tumor necrosis factor
staphylococcal enterotoxin B lipopolysaccharide transcription toxic shock
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