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The Journal of Immunology, Vol 144, Issue 4 1270-1275, Copyright © 1990 by American Association of Immunologists

ARTICLES

Phenotypic profile and functions of T cell receptor-gamma delta-bearing cells from patients with primary immunodeficiency syndrome

T Morio, M Nagasawa, S Nonoyama, H Okawa and J Yata
Department of Pediatrics, Faculty of Medicine, Tokyo Medical and Dental University, Japan.

TCR-gamma delta-bearing T cells have been reported to be increased in several immunodeficient patients. However, their functional role and phenotypic characterization have not yet been well documented. In this study we examined the surface phenotypes and functional properties of TCR-gamma delta+ cells from several patients with primary immunodeficiency syndrome. It was demonstrated that TCR-gamma delta+ cells detected by TCR-delta 1 mAb were increased in some of the patients, particularly in patients with Wiskott-Aldrich syndrome and severe combined immune deficiency. The TCR-gamma delta+ cells showed such a unique profile that more than 60% of the cells expressed delta- TCS1, which is normally present in a lesser amount, and that most of the cells lacked CD5 T lineage marker. TCR-gamma delta+ cells from the patients with primary immunodeficiency syndrome served as NK cells as observed in normal individuals, while displaying weak LAK and allogeneic cell-specific killer activities. The TCR-gamma delta+ cells were classified into several subpopulations according to their antigenic phenotype, then their NK activity of normal individuals and patients, lymphokine-activated killer and allo-specific killer activities of normal individuals were compared among the subpopulations. Delta-TCS1+ cells mediated almost the same killer activities as total TCR-gamma delta+ cells, whereas CD8+ TCR-gamma delta+ cells displayed stronger cytotoxic activities in both normal subjects and the patients with primary immunodeficiency syndrome.


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[Abstract] [Full Text] [PDF]


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