The Impact of Vitamin D Supplementation on Glucose Metabolism in Chinese Women With Former Gestational Diabetes Mellitus

Gestational Diabetes Mellitus Clinical Trial

Official title: The Impacts of Vitamin D Supplementation on Glucose Metabolism in Chinese Women With Vitamin D Deficiency and Former Gestational Diabetes Mellitus:A Randomised Control Trial

Status Enrolling by invitation

Clinical Trial Summary

Vitamin D deficiency are related to insulin resistance and impaired beta-cell function.It is reported that the level of vitamin D is lower during pregnancy and postpartum in the women with Gestational Diabetes Mellitus. The investigators hypothesize that vitamin D supplementation to women after birth with previous gestational diabetes may improve glucose metabolism.

Clinical Trial Description

Gestational diabetes mellitus (GDM) is defined as any degree of glucose intolerance that is first identified during pregnancy, excluding diabetic patients diagnosed before pregnancy. GDM can not only have an adverse effect on the pregnant women and the developing fetus, but also can have long lasting effects after birth. GDM can elevates risks of abnormal glucose metabolism postpartum. Vitamin D deficiency has been shown to be associated with insulin resistance and impaired β-cell function. Our previous research also implied that the level of vitamin D is much lower in the women of impaired glucose regulation after birth with history of GDM. This prospective randomized, control clinical trial was designed to evaluate the effects of vitamin D administration on insulin resistance and β-cell function among women with vitamin D deficiency（25OHD <50 ng/mL）and previous GDM. Participants with vitamin D deficiency and previous GDM were divided into normal glucose regulation group(NGR) (n=90) and impaired glucose regulation group(IGR)(n=90) according to the oral glucose tolerance test (OGTT) around 42 days postpartum. And each group was further divided into intervention group and control group, Participants in the intervention group took 1600 units of vitamin D daily for nine months and meanwhile receive lifestyle intervention. The control group only receive lifestyle intervention. This study aimed to evaluate the impact of vitamin D supplementation on insulin sensitivity, pancreatic β-cell function and markers of inflammation in Chinese women with former GDM and vitamin D insufficiency. ;

Related Conditions & MeSH terms

• Diabetes Mellitus
• Diabetes, Gestational
• Gestational Diabetes Mellitus

• NCT number: NCT03138616
• Study type: Interventional
• Source: Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine
• Status: Enrolling by invitation
• Phase: Phase 4
• Start date: November 1, 2016
• Completion date: January 31, 2019