Abstract:
:Differentiation of bone marrow derived precursors into mature T cells takes place in the thymus. During differentiation, T cells develop the receptor repertoire which allows them to recognize antigen in the context of self major histocompatibility complex (MHC) molecules. Mature T helper cells (mostly CD4+ CD8-) recognize antigen in the context of class II MHC molecules, whereas cytotoxic T cells (mostly CD4-CD8+) recognize antigen in the context of class I MHC determinants. Thymic MHC-encoded determinants greatly influence the selection of the T-cell receptor repertoire. In addition to positive selection, a negative selection to eliminate self-reactive T-cell clones is thought to occur in the thymus, but how this 'education' occurs is not well understood. It has been suggested that during differentiation an interaction between the T-cell receptor (TCR) and MHC-encoded determinants occurs, leading to the selection of an MHC-restricted receptor repertoire. In support of this hypothesis, class-II-specific, CD4+ CD8- helper T cells fail to develop in mice neonatally treated with anti-class II monoclonal antibody (mAb). As CD4-CD8+ cells differ from the CD4+ CD8- lineage (in function, MHC-restriction specificity and perhaps site of education) we examined whether interactions with MHC determinants are also necessary for the development of class-I-specific T cells. Here we show that mice chronically treated with anti-class I mAb from birth lack CD4-CD8+ cells and cytotoxic T-cell precursors, indicating that most CD4-CD8+ T cells need interaction with class I MHC molecules during differentiation.
journal_name
Naturejournal_title
Natureauthors
Maruŝić-Galesić S,Stephany DA,Longo DL,Kruisbeek AMdoi
10.1038/333180a0subject
Has Abstractpub_date
1988-05-12 00:00:00pages
180-3issue
6169eissn
0028-0836issn
1476-4687journal_volume
333pub_type
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