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  • Title: Fetomaternal adrenomedullin levels in diabetic pregnancy.
    Author: Di Iorio R, Marinoni E, Urban G, Costantini A, Cosmi EV, Letizia C.
    Journal: Horm Metab Res; 2001 Aug; 33(8):486-90. PubMed ID: 11544563.
    Abstract:
    We investigated whether maternal and fetoplacental adrenomedullin, a newly discovered hypotensive peptide involved in the insulin regulatory system, is modified in diabetic pregnancy. We studied its correlation with pregnancy complications associated with this disease. Thirty-six pregnant women with diabetes (13 with type I and 23 with gestational diabetes mellitus) and in 40 uncomplicated pregnancies were included. 10 out of 36 diabetic pregnancies were complicated by gestational hypertension. In each woman, adrenomedullin concentration in maternal and fetal plasma and in amniotic fluid was assessed by specific radioimmunoassay. We found that overall mean amniotic fluid adrenomedullin concentration was higher (p < 0.05) in diabetic (14.7 +/- 1.6 fmol/ml) than in uncomplicated pregnancies (10.8 +/- 0.9 fmol/ml), whereas no differences were present in maternal and fetal plasma adrenomedullin levels between diabetic and uncomplicated pregnant women. High levels of amniotic fluid adrenomedullin were found in both type I and gestational diabetes mellitus pregnancies (13.7 +/- 1.4 and 15.6 +/- 2.2 fmol/ml, respectively). Diabetic pregnancies complicated by gestational hypertension showed lower (p < 0.05) amniotic fluid adrenomedullin concentrations than normotensive diabetic patients. These findings suggest that placental adrenomedullin production is upregulated in diabetic pregnancy, and it may be important to prevent excessive vasoconstriction of placental vessels.
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