Summary
HLA-typing was performed in two groups of juvenile-onset diabetics, one with (n = 58) and one without (n = 109) a family history of the disease. The association of this type of diabetes with certain HLA antigens (excess of B8 and B15, shortage of B7) was confirmed. No heterogeneiteis could be established between the two groups. This suggests that the aetiologic basis in single and familial cases of juvenile diabetes is the same. The hypothesis, that the B8 associated gene is more penetrant than the B15 associated gene, cannot be confirmed. Haplo-types were determined in families with one and two diabetic siblings. The findings of high haplotype concordance among diabetic siblings was confirmed: concordance of 2, 1 and 0 haplotypes in 7, 5 and 3 pairs respectively. There was a low degree of haplotype concordance between diabetics and non-affected siblings in the families with two diabetics: 2, 1, and 0 haplotypes in 2, 8 and 6 pairs respectively. This led to the hypothesis of negative selection against these HLA-linked “diabetogenic” genes. This tendency was not, however, observed in families with only one diabetic. The report of a high recombination rate in families with juvenile diabetics could not be confirmed.
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Bengsch, N., Köbberling, J., Eckert, G. et al. HLA-typing in juvenile diabetics with and without positive family history and in families with one and two diabetic siblings. Diabetologia 15, 447–451 (1978). https://doi.org/10.1007/BF02342868
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DOI: https://doi.org/10.1007/BF02342868