Activated CD4+ and CD8+ T-lymphocytes in newly diagnosed type 1 diabetes: a prospective study.
Peripheral lymphocytes from 13 Type 1 diabetic patients (age 28 +/- 11 (+/- SD) years) were studied at diagnosis, and 1 month and 7 months later. The lymphocytes were labelled with phycoerythrin-conjugated anti-HLA-DR antibody and/or fluorescein-conjugated OKT4 or OKT8 antibody, and then studied using a double channel flow-cytometer. The overall percentage of activated T-lymphocytes (CD4+ + CD8+ cells) was (mean +/- SE) 3.1 +/- 0.5% at diagnosis, 2.1 +/- 0.3% at 1 month and 2.2 +/- 0.5% at 7 months test. The percentages at diagnosis and 1 month were higher than in 12 healthy control subjects (1.0 +/- 0.2%, p less than 0.001 and p less than 0.01, respectively). Among the CD4+ cells the percentage of activated cells fell from diagnosis (2.8 +/- 0.7%), to 1 month (1.5 +/- 0.3%, p less than 0.05), and 7 months (1.5 +/- 0.4%, p less than 0.05), whereas among the CD8+ cells they remained unchanged (3.3 +/- 0.6, 2.5 +/- 0.5 and 3.1 +/- 0.6%). The percentage of activated CD4+ cells at diagnosis, and of CD8+ cells at all times, were higher (p less than 0.02) than in control subjects (CD4+, 0.8 +/- 0.2%; CD8+, 1.2 +/- 0.2%). In conclusion, the activated T-lymphocytes present in Type 1 diabetic patients at diagnosis are equally increased among CD4+ and CD8+ cells, but after 7 months the increase is predominantly in CD8+ cells.
Buschard
K
K
Bartholin Institute, Kommunehospitalet, Copenhagen, Denmark.
Damsbo
P
P
Röpke
C
C
D000328:Adult; D015703:Antigens, CD / Q000032:analysis*; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis*; D015704:CD4 Antigens / Q000032:analysis*; D016827:CD8 Antigens; D003922:Diabetes Mellitus, Type 1 / Q000175:diagnosis / Q000276:immunology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D066298:In Vitro Techniques; D008213:Lymphocyte Activation; D008297:Male; D011446:Prospective Studies; D012016:Reference Values; D013601:T-Lymphocytes / Q000276:immunology*
D015703:Antigens, CD; D000945:Antigens, Differentiation, T-Lymphocyte; D015704:CD4 Antigens; D016827:CD8 Antigens