Role of ET-1, Physical Activity, and Sedentary Behavior in Microvascular Dysfunction Following GDM

Women with a history of gestational diabetes mellitus (GDM) are at a 2-fold greater risk for the development of overt cardiovascular disease (CVD) following the effected pregnancy. While subsequent development of type II diabetes elevates this risk, prior GDM is an independent risk factor for CVD morbidity, particularly, within the first decade postpartum. GDM is associated with impaired endothelial function during pregnancy and decrements in macro- and microvascular function persist postpartum, despite the remission of insulin resistance following delivery. Collectively, while the association between GDM and elevated lifetime CVD risk is clear, and available evidence demonstrates a link between GDM and vascular dysfunction in the decade following pregnancy, the mechanisms mediating this persistent dysfunction remain unexamined. The purpose of this investigation is to examine the role of endothelin-1, a potent vasoconstrictor, in aberrant microvascular function in otherwise healthy women with a history of GDM and to identify whether this mechanism is influenced by physical activity and sedentary behavior.

NCT Number	NCT06547619
Lead Sponsor	Anna Stanhewicz, PhD
Conditions	Gestational Diabetes, Endothelial Dysfunction, Physical Inactivity
Enrollment	40 participants
Start Date	2024-10-01
Primary Completion	2026-09 (estimated)
Study Completion	2027-05 (estimated)
Updated on ClinicalTrials.gov	2026-07-29