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  • Title: Urine albumin is a superior predictor of preeclampsia compared to urine plasminogen in type I diabetes patients.
    Author: Nielsen LH, Jensen BL, Fuglsang J, Andersen LLT, Jensen DM, Jørgensen JS, Kitlen G, Ovesen P.
    Journal: J Am Soc Hypertens; 2018 Feb; 12(2):97-107. PubMed ID: 29305116.
    Abstract:
    Pregnant women with type I diabetes mellitus (T1DM) are at increased risk of developing preeclampsia (PE). Plasminogen is aberrantly filtrated from plasma into tubular fluid in PE patients and activated to plasmin. Plasmin activates the epithelial sodium channel in the collecting ducts potentially causing impaired sodium excretion, suppression of the renin-angiotensin-aldosterone system, and hypertension in PE. The objective of the study was to test whether urinary total plasmin(ogen)/creatinine ratio and plasma concentration of aldosterone were better predictors of PE in pregnant women with T1DM compared with urine albumin and haemoglobin A1C. The design was a longitudinal observational study of 88 pregnant T1DM patients at 2 Danish centers. Spot urine- and blood samples were collected at gestational weeks 12, 20, 28, 32, and 36. U-plasmin(ogen)/creatinine ratio increased during pregnancy. In gestational week 36, the ratio was significantly increased in the T1DM patients developing PE (P < .05). P-aldosterone was significantly increased in gestational week 20 in the group developing PE (P < .05). U-albumin/creatinine ratio was significantly increased and predicted PE at all tested gestational ages. U-albumin/creatinine ratio had a stronger association with the development of PE compared to u-total plasmin(ogen)/creatinine ratio and p-aldosterone. The positive association between u-total plasmin(ogen) and development of PE late in pregnancy is compatible with involvement in PE pathophysiology. The significance of albumin in urine emphasizes the importance of preventing renal complications when planning pregnancy in patients with type I diabetes.
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