Summary
Circulating lymphocytes from 39 juvenile insulin dependent diabetics of recent onset were studied by six membrane marker techniques and mitogen stimulation. Well controlled (n = 14) were grouped separately from poorly controlled (n = 25) patients. The total lymphocyte counts were not different from 50 control subjects. The percentage of T-cells detected by erythrocyte rosettes and B-cells detected by erythrocytes — antibody — complement rosettes was significantly decreased only in poorly-controlled diabetics (64.1 ± 1.3 and 9.7 ± 1.8, vs 71.0 ± 1.0 and 15.3 ± 0.6 in controls). Cells bearing receptors for the Fc fragment of IgG immunoglobulins were decreased in both groups. Mitogen stimulation was not different from controls but was significantly lower in poorly controlled than in well controlled diabetics. Optimal blood glucose control for 5 ± 2 days using an external artificial pancreas led to a rapid normalisation of membrane marker values and mitogen responsiveness of lymphocytes from previously poorly controlled diabetics. Separate in vitro experiments showed that glucose had an inhibitory effect on mitogen stimulation at concentrations ⩾8.3 mmol/l and on T- and B-lymphocyte numbers at concentrations ⩾55.6 mmol/l. DL 3-hydroxybutyrate tested at 17.1 and 34.2 mmol/l only depressed mitogen responsiveness. Such results suggest a rapidly reversible T-cell defect closely linked to the existing metabolic disturbances.
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Selam, J.L., Clot, J., Andary, M. et al. Circulating lymphocyte subpopulations in juvenile insulin-dependent diabetes. Diabetologia 16, 35–40 (1979). https://doi.org/10.1007/BF00423148
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DOI: https://doi.org/10.1007/BF00423148