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  • Title: Maternal history of type 2 diabetes is associated with diabetic nephropathy in type 1 diabetic patients.
    Author: Hadjadj S, Duengler F, Torremocha F, Faure-Gerard G, Bridoux F, Boissonnot M, Mauco G, Guilhot J, Maréchaud R.
    Journal: Diabetes Metab; 2007 Feb; 33(1):37-43. PubMed ID: 17258929.
    Abstract:
    AIMS: Insulin resistance is a key feature of type 2 diabetes. It is also involved in the development and progression of microvascular complications. We analysed the relationship between parental history of diabetes, insulin resistance and diabetic nephropathy (DN) and assessed the specific maternal and paternal influences of history of type 2 diabetes on DN in type 1 diabetic offspring. METHODS: We recorded information regarding family history of type 2 diabetes and of cardiovascular disease in 160 consecutive, unrelated type 1 diabetic patients. Insulin resistance was assessed using a validated estimation of the glucose disposal rate (eGDR). RESULTS: Type 1 diabetic patients with a maternal history of type 2 diabetes were more likely to be insulin-resistant (P=0.043) and to have renal complications (P=0.0041) than those from the reference group (without parental history of diabetes), while patients with a paternal history were not different from those from the reference group, regarding eGDR and DN. Time to development of abnormal albuminuria was significantly affected by maternal history of type 2 diabetes (log-rank=12.66; P=0.0004) and by familial history of premature cardiovascular disease (log-rank=5.48; P=0.0234). In multivariate analysis, a maternal history of type 2 diabetes was independently associated with nephropathy after adjustment for sex, diabetes duration and familial history of premature cardiovascular disease. CONCLUSION: Maternal history of type 2 diabetes is independently associated with DN in type 1 diabetic patients. This might suggest the transmission of a maternal trait related to microvascular complications, raising the hypothesis of imprinted genes predisposing to diabetic renal disease.
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