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The ability of antigen receptors to engage self-ligands with varying affinity is crucial for lymphocyte development. To further explore this concept, we generated transgenic mice expressing GFP from the immediate early gene Nr4a1 (Nur77) locus. GFP was up-regulated in lymphocytes by antigen receptor stimulation but not by inflammatory stimuli. In T cells,(More)
CD1d-reactive invariant NKT cells (iNKT) play a vital role in determining the characteristics of immune responses to infectious agents. Previous reports suggest that iNKT cell activation during infection can be: 1) solely driven by cytokines from innate immune cells, 2) require microbial Ag, or 3) require self-Ag. In this study, we examined the role of Ag(More)
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