Summary
A highly polymorphic locus flanking the human insulin gene contains two major size classes of DNA restriction fragments, which segregate in families as stable genetic elements. The L-allele, i.e. fragments with an average size of about 600 base-pairs seems to be a weak genetic marker for Type 1 (insulin-dependent) diabetes mellitus, whereas the Uallele, i. e. fragments of an average size of about 2500 basepairs hitherto has been associated with Type 2 (non-insulin-dependent) diabetes mellitus and diabetic hypertriglyceridaemia. The most recent reports on this subject do not confirm an association between the U-allele and Type 2 diabetes. Our own studies indicate that the U-allele is a fairly strong marker for the development of atherosclerosis (relative risk for U-carriers 3.36). The putative functions of the polymorphic region in atherogenesis and the relation of this region to other genetic markers for atherosclerosis are not known.
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Mandrup-Poulsen, T., Owerbach, D., Nerup, J. et al. Insulin-gene flanking sequences, diabetes mellitus and atherosclerosis: a review. Diabetologia 28, 556–564 (1985). https://doi.org/10.1007/BF00281989
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DOI: https://doi.org/10.1007/BF00281989