Cross-reactivity in T-cell antigen recognition.

Abstract:

:The molecular interactions between the T-cell receptor (TCR) and peptide-MHC (pMHC) have been elucidated in recent years. Nevertheless, the fact that binding of only slightly different ligands by a TCR, or ligation of the same pMHC at different developmental stages of the T cell, can have opposing consequences, continues to pose intellectual challenges. Kinetic proofreading models, which have at their core the dissociation rates of pMHC from the TCR, are best suited to account for these observations. However, T cells can be triggered by peptides with often minimal homology to the primary immunogenic peptide. This cross-reactivity of the TCR is manifest at several levels, from positive selection of immature thymocytes to homeostasis and antigen-cross- reactive immune responses of mature peripheral T cells. The implications of the high cross-reactivity of T-cell antigen recognition for self-tolerance and T-cell memory are discussed.

journal_name

Immunol Cell Biol

authors

Regner M

doi

10.1046/j.1440-1711.2001.00994.x

subject

Has Abstract

pub_date

2001-04-01 00:00:00

pages

91-100

issue

2

eissn

0818-9641

issn

1440-1711

journal_volume

79

pub_type

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