Close phenotypic and functional similarities between human and murine alphabeta T cells expressing invariant TCR alpha-chains.
J Immunol
; 158(12): 5603-11, 1997 Jun 15.
Article
en En
| MEDLINE
| ID: mdl-9190907
ABSTRACT
Several studies have demonstrated the existence of a murine NK1.1+ alphabeta T cell subset expressing V alpha14+ TCR alpha-chains with highly conserved invariant junctional sequences and able to secrete Th2 cytokines when exposed to CD1+ stimulator cells. In humans, alphabeta T cells carrying invariant V alpha24+ TCR alpha-chains highly homologous to those expressed by murine NK1.1 cells have been recently described. Here we show that these cells (referred to as V alpha24inv T cells) and murine NK1.1+ alphabeta T cells resemble each other in several ways. First, like their murine counterparts, T cells expressing high levels of V alpha24inv TCRs can be either CD4- CD8- double negative (DN) or CD4+, but they never express heterodimeric CD8 molecules. Second, most V alpha24inv T cells are brightly stained by NKRP1-specific mAb but not by mAb directed against other type II transmembrane proteins of the NK complex. Third, DN and particularly CD4+ V alpha24inv T cells are greatly enriched for IL-4 producers. The concomitant expression of highly conserved TCRs of a particular set of NK markers and of Th2 cytokines in human and murine alphabeta T cells suggests a coordinate acquisition of these phenotypic and functional properties. Furthermore, the relatively high frequency of human V alpha24inv T cells, which are presently shown to represent on average 1/500 PBL, and the high interindividual variations of the size of this cell subset under physiologic conditions go for a major role played by alphabeta T cells carrying invariant TCR in a large array of immune responses.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Células Asesinas Naturales
/
Receptores de Antígenos de Linfocitos T alfa-beta
Límite:
Animals
/
Humans
Idioma:
En
Revista:
J Immunol
Año:
1997
Tipo del documento:
Article
País de afiliación:
Francia