FGF19 and the Expression of IRS-1 and GLUT-1 in Gestational Diabetes Mellitus

Gestational Diabetes Mellitus Clinical Trial

Official title:

Effects of Fibroblast Growth Factors 19 on the Expression of Insulin Receptor Substrate-1/Glucose Transporter-1 in Trophoblast Cells Cultured in High Glucose

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03816605
• Other study ID #: FGF19
• Status: Completed
• Start date: April 2014
• Est. completion date: April 2016

Study information

• Verified date: January 2019
• Source: First Affiliated Hospital, Sun Yat-Sen University
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

Insulin resistance plays a key role in the development of gestational diabetes mellitus(GDM). As the largest endocrine organ and the transport intermediary of maternal-fetal nutrient and a large of hormone and enzymes, placenta not only plays an important role in insulin resistance, but also have a profound effect on fetal growth and development.

Insulin receptor substrate(IRS)-1, as a key signaling protein, plays vital role in the downstream of insulin receptor signaling pathway. Many studies have suggested that the central part of insulin resistance may be the insulin receptor substrate defect and the abnormal expression of the gene or protein of IRS-1 is one of the molecular mechanisms of the dysfunction of the insulin signaling pathway. The expression of IRS-1 and its tyrosine phosphorylated protein decreased abnormally in placenta, skeletal muscle and adipose tissue of GDM patients, which might be a significant cause to insulin resistance in GDM.

Besides, glucose transporter-1(GLUT-1), which may play a major role in the glucose transporter in the placenta. The increase of blood glucose in patients with GDM has apparent up-regulating effect on the expression of GLUT-1 in the placenta, which is associated the development of offspring.

The investigators' previous study showed that FGF19 in serum, placenta and musculus rectus abdominis was significantly decreased in patients with GDM, and was related to insulin resistance. Thus, the investigators speculate that the abnormal expression of FGF19 may be involved in the development of insulin resistance in GDM patients and disorder of carbohydrate and lipid metabolism.

In the present study, the investigators will further investigate the effect of FGF19 on the expression of IRS-1/GLUT-1 in cultured trophoblast cells of high glucose, and probe into the effect of FGF19 on the insulin resistance and glucose transport.

Description:

Women who choose to terminate pregnancy because of maternal factors at the first and second trimester, or delivered at term in the First Affiliated Hospital of Sun Yat-sen University were enrolled in the study.

Samples for measurement were obtained from women undergoing induced abortion or caesarean section. The villous trophoblast extracted from the placental villus were treated with recombinant FGF19, high glucose medium or both recombinant FGF19 and high glucose medium or neither. By the end of culture, mRNA and protein expression levels of IRS-1/GLUT-1 were investigated with real-time quantitative polymerase chain reaction (qRT-PCR) and western-blot, respectively. Clinical data were collected and analyzed.

Data were analyzed by SPSS20.0 database. The results were expressed as mean ± standard deviations, median or rate. Differences between groups were assessed by Student's unpaired t test, Mann-Whitney U test, or Chi-square test as appropriate. P values of <0.05 were considered significant.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 36
• Est. completion date: April 2016
• Est. primary completion date: April 2016
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Female
• Age group: 18 Years to 40 Years

Eligibility

Inclusion Criteria:

• Women who choose to terminate pregnancy because of maternal factors in the First Affiliated Hospital of Sun Yat-sen University at the 6-10 weeks of gestation.

Exclusion Criteria:

• Younger than 18 years old;

• Older than 40 years old;

• Diagnosed DM before pregnancy;

• Complicated with other diseases such as GDM, insulin resistance, obesity and related endocrine diseases, etc.;

Related Conditions & MeSH terms

• Diabetes Mellitus
• Diabetes, Gestational
• Gestational Diabetes Mellitus

Locations

Country	Name	City	State
China	Obstetrics and Gynechology Department of the 1st affiliated hospital of Sun Yat-sen University	Guangzhou	Guangdong

Sponsors (1)

Lead Sponsor	Collaborator
First Affiliated Hospital, Sun Yat-Sen University

Country where clinical trial is conducted

China, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Expression of IRS-1 and GLUT-1 in different group	concentration of IRS-1 and GLUT-1 in mmol/l	six months