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  • Title: Genetics of Type I diabetes mellitus: a single, recessive predisposition gene mapping between HLA-B and GLO. With an appendix on the estimation of selection bias.
    Author: Rubinstein P, Ginsberg-Fellner F, Falk C.
    Journal: Am J Hum Genet; 1981 Nov; 33(6):865-82. PubMed ID: 7034534.
    Abstract:
    Three different published sets of HLA-typed families of juvenile diabetes mellitus (JDM) patients have been analyzed. There was no significant genetic heterogeneity between them according to the criterion of Morton, and the total material was analyzed on the assumption of a single recessive (JDM-P) gene with incomplete penetrance. The analysis, carried out with the NYLIP program modified to account for penetrance less than 1 and for selection bias, yields highly significant lod scores for linkage between HLA and JDM-P, with a maximum value of 7.40 at theta = .05 +/- .03. The segregation of HLA and GLO in five affected sib pairs, in which one of the sibs carries an HLA/GLO recombinant, places JDM-P closer to HLA than the GLO locus: four of these five pairs are HLA-identical and GLO-different, in agreement with the conclusions of the formal linkage analysis. The data from these three independent sets of families are therefore consistent with our earlier claim that JDM is inherited as a recessive trait closely linked to HLA with reduced penetrance, and its analysis does not require more complicated genetic models.
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