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Immunology. 2018 Sep;155(1):63-71. doi: 10.1111/imm.12945. Epub 2018 May 25.

Differential T-cell receptor signals for T helper cell programming.

Author information

1
Department of Immunology, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA.

Abstract

Upon encounter with their cognate antigen, naive CD4 T cells become activated and are induced to differentiate into several possible T helper (Th) cell subsets. This differentiation depends on a number of factors including antigen-presenting cells, cytokines and co-stimulatory molecules. The strength of the T-cell receptor (TCR) signal, related to the affinity of TCR for antigen and antigen dose, has emerged as a dominant factor in determining Th cell fate. Recent studies have revealed that TCR signals of high or low strength do not simply induce quantitatively different signals in the T cells, but rather qualitatively distinct pathways can be induced based on TCR signal strength. This review examines the recent literature in this area and highlights important new developments in our understanding of Th cell differentiation and TCR signal strength.

KEYWORDS:

CD4 cell; T-cell receptors; regulatory T cells; signal transduction

PMID:
29722021
PMCID:
PMC6099163
DOI:
10.1111/imm.12945
[Indexed for MEDLINE]

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