alexa Early signaling events that underlie fate decisions of naive CD4(+) T cells toward distinct T-helper cell subsets.


Immunome Research

Author(s): Yamane H, Paul WE

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CD4(+) T-helper (Th) cells are a major cell population that play an important role in governing acquired immune responses to a variety of foreign antigens as well as inducing some types of autoimmune diseases. There are at least four distinct Th cell subsets (Th1, Th2, Th17, and inducible T-regulatory cells), each of which has specialized functions to control immune responses. Each of these cell types emerge from naive CD4(+) T cells after encounter with foreign antigens presented by dendritic cells (DCs). Each Th cell subset expresses a unique set of transcription factors and produces hallmark cytokines. Both T-cell receptor (TCR)-mediated stimulation and the cytokine environment created by activated CD4(+) T cells themselves, by 'partner' DCs, and/or other cell types during the course of differentiation, play an important role in the fate decisions toward distinct Th subsets. Here, we review how TCR-mediated signals in collaboration with the cytokine environment influence the fate decisions of naive CD4(+) T cells toward distinct Th subsets at the early stages of activation. We also discuss the roles of TCR-proximal signaling intermediates and of the Notch pathway in regulating the differentiation to distinct Th phenotypes.

This article was published in Immunol Rev and referenced in Immunome Research

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