Abnormal carbohydrate metabolism during pregnancy : association with endothelial dysfunction

Area of Science:

• Obstetrics and Gynecology
• Endocrinology
• Vascular Biology

Background:

• Endothelial dysfunction is common in premenopausal women with type 2 diabetes.
• Early detection of vascular changes in pregnancy is crucial for maternal health.

Purpose of the Study:

• To investigate endothelial function in early stages of diabetes during pregnancy, specifically impaired glucose tolerance (IGT) and gestational diabetes mellitus (GDM).
• To determine if endothelial dysfunction is an early marker in these conditions.

Main Methods:

• Brachial artery flow-mediated dilatation (FMD) and nitrate-induced dilatation (NID) were measured using high-resolution vascular ultrasonography.
• Measurements were taken in pregnant women with IGT (n=10), GDM (n=13), and healthy pregnant controls (n=15) during the third trimester.
• Fasting lipid profiles and oral glucose tolerance tests were also performed.

Main Results:

• Flow-mediated dilatation (FMD) was significantly reduced in both IGT and GDM groups compared to controls.
• A significant difference in FMD was observed between the IGT and GDM groups.
• FMD showed a strong negative correlation with glycemic area, indicating a direct relationship between blood sugar levels and endothelial function.

Conclusions:

• Endothelial dysfunction is an early finding in pregnancies with IGT and GDM.
• This dysfunction appears directly related to glycemic levels.
• It may contribute to the increased risk of hypertensive disorders observed in these pregnancies.