ISSN:
1432-0428
Schlagwort(e):
Non-obese diabetic mouse
;
T cell receptor
;
monoclonal antibody
;
cyclophosphamide
;
insulitis
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Medizin
Notizen:
Summary The expression of specific T-cell receptor gene segments by T lymphocytes appears to be critically important for the induction of several experimental autoimmune diseases mediated by these cells. We examined whether this situation also applied to non-obese diabetic mice by using various T-cell receptor VΒ-specific monoclonal antibodies. No significant age- or sex-related differences were observed in VΒ usage by peripheral and splenic T lymphocytes. CD8+ T lymphocytes among the islet-derived mononuclear cells isolated from 20-week-old female non-obese diabetic mice showed heterogeneity of their VΒ gene usage. In order to examine the role of T lymphocyte subsets expressing specific T-cell receptor VΒ gene segments in the development of diabetes mellitus, T-cell receptor VΒ-specific monoclonal antibodies were administered to 10-week-old male non-obese diabetic mice treated with cyclophosphamide. None of the antibodies used could significantly diminish the incidence of cyclophosphamide-induced diabetes and the severity of insulitis [anti-VΒ3 (11 of 22 mice became diabetic, 50%), anti-VΒ5 (9 of 14, 64%), anti-VΒ8 (9 of 21, 43%), anti-VΒ11 (12 of 23, 52%), anti-VΒ14 (7 of 12, 58%), and anti-VΒ5 + anti-VΒ11 (6 of 12, 50%)] when compared with control mice (12 of 21, 57%). In addition, there were no significant differences in T-cell receptor VΒ usage between diabetic and non-diabetic cyclophosphamide-treated mice. These results suggest that five T-lymphocyte subsets expressing different T-cell receptor VΒ gene segments, considered to be candidates involved in the pathogenesis of autoimmune diabetes, do not individually contribute to the development of cyclophosphamide-induced diabetes in non-obese diabetic mice.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00402273
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