Splenic NK1.1-negative, TCR alpha beta intermediate CD4+ T cells exist in naive NK1.1 allelic positive and negative mice, with the capacity to rapidly secrete large amounts of IL-4 and IFN-gamma upon primary TCR stimulation.

Abstract excerpt

Splenic NK1.1+CD4+ T cells that express intermediate levels of TCR alpha beta molecules (TCRint) and the DX5 Ag (believed to identify an equivalent population in NK1.1 allelic negative mice) possess the ability to rapidly produce high quantities of immunomodulatory cytokines, notably IL-4 and IFN-gamma, upon primary TCR activation in vivo. Indeed, only T cells expressing the NK1.1 Ag appear to be capable of this...

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