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  • Title: Immunoglobulin allotypes and virus antibodies in Finnish type 1 diabetic patients.
    Author: Hyöty H, Pandey JP, Lehtinen M, Kulomaa P, Leinikki P.
    Journal: Exp Clin Immunogenet; 1988; 5(1):52-9. PubMed ID: 2856169.
    Abstract:
    We have found elevated IgA class mumps and Coxsackie B4 virus antibodies and IgA/IgG antibody ratios in type 1 diabetic patients. However, IgA class herpes simplex (HSV1) virus antibodies showed no difference between patients and controls. To study the possible contribution of genetically polymorphic immunoglobulin markers to the pronounced IgA class reactivity Ig allotypes (Gm, A2m and Km determinants) were compared to virus antibodies in diabetic patients and healthy controls. Ig allotypes were equally distributed in both groups suggesting that the genes coding for these structures are not in close linkage disequilibrium with susceptibility gene(s) for type 1 diabetes. Accordingly, pronounced IgA class immune response in diabetic patients is hardly due to Ig allotype related factors. Patients had elevated IgA class mumps and Coxsackie B4 antibodies and IgA/IgG antibody ratios independently of the Gm phenotype group. In healthy subjects but not in diabetic patients IgA class mumps antibody levels and IgA/IgG mumps antibody ratios significantly correlated with the Gm phenotypes. Such Gm association was not observed in Coxsackie B4 or HSV1 antibodies. These results suggest that though Gm phenotypes have a general effect on mumps specific antibody response, some other factors than Ig allotypes are responsible for the elevated IgA class mumps and Coxsackie B antibody levels and IgA/IgG antibody ratios in type 1 diabetes.
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