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The GITR-GITRL Interaction: Co-stimulation or Contrasuppression of Regulatory Activity?

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Journal Nat Rev Immunol
Date 2006 Jul 27
PMID 16868552
Citations 116
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Abstract

Stimulation of T cells through GITR (glucocorticoid-induced tumour-necrosis-factor-receptor-related protein) has been shown to enhance immunity to tumours and viral pathogens, and to exacerbate autoimmune disease. The effects of stimulation through GITR are generally thought to be caused by attenuation of the effector activity of immunosuppressive CD4+ CD25+ regulatory T (T(Reg)) cells. Here we propose a model in which GITR-GITR-ligand interactions co-stimulate both responder T-cell functions and the suppressive functions of T(Reg) cells.

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