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Exploration of the Lipid Metabolism During the Diabetic Pregnancies

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赞助商
University Hospital, Lille
合作者
Ministry of Health, France

关键词

抽象

Justification:
Intrauterine exposure to type 1 or type 2 diabetes increase the risk of macrosomia (35 % to 50 % versus 10 % in general population) despite a good glycemic control. The consequences are : shoulder's dystocia, lung immaturity, caesarean section, neonatal hypoglycaemia and a high frequency of obesity and metabolic disorders in adults.
The mechanisms of macrosomia are unclear; chronic hyperglycemia and subsequent hyperinsulinaemia observed during the diabetic pregnancy might explain only partially the fetal weight. Considerable interest has been generated over the last decade on the lipids and fatty acids alterations in diabetes pregnancies. Change in lipoproteins metabolism have been described associated with macrosomia. Maternal nutrition before and during pregnancy plays an important role in fetal growth and subsequent development of an increased susceptibility to obesity and diabetes in later life.
Main objective:
Looking for an association between maternal and fetal blood lipid parameters and birth weight and body fat in a context of type 1 or type 2 diabetes.
Secondary objectives:
- Identify lipid markers associated with fetal macrosomia.
- Analyze the placenta by measuring the expression of genes implicated in the storage and the transfer of fatty acids.
- Analyze and compare the expression level of placental genes subjected to parental imprinting and validated in animal models.

描述

Plan of study:

Longitudinal study on 3 groups: 70 type 1 diabetic women, 70 type 2 diabetic women and 70 women with normal glucose tolerance during pregnancy. Recruitment in the department of Diabetology and Obstetrics of CHRU of Amiens and Lille.

Nutritional survey and sampling of blood in the 1st, 2nd and 3rd trimester of pregnancy and at 6 weeks post partum.

Collection of cord blood and placental tissues. Histological and molecular analysis of placenta will be realized both in the departments of Anatomopathology of Lille and Amiens and in Biochemistry Molecular Biology of CHRU of Lille.

Homocysteine and folate assays on cord blood will be centralized in Paris (Hospital St Louis).

Main criteria of judgment

Fetal weight corrected by the gestational age.

Expected results:

- An inverse correlation between maternal and fetal blood fatty acids ratios (polyunsaturated fatty acids/ monounsaturated fatty acids + saturated) and birth weight in the diabetic groups.

- Differences of distribution of fatty acids of maternal and foetal erythrocytic phospholipids correlated with the fetal weight.

- Qualitative and quantitative variations of expression of placental genes such as lipases and genes submitted to parental imprinting.

The biologic parameters will be confronted with the data of the nutritional survey and with glycemic control during pregnancy.

日期

最后验证: 04/30/2016
首次提交: 03/13/2008
提交的预估入学人数: 03/18/2008
首次发布: 03/19/2008
上次提交的更新: 05/30/2016
最近更新发布: 05/31/2016
实际学习开始日期: 12/31/2007
预计主要完成日期: 12/31/2011
预计完成日期: 11/30/2013

状况或疾病

Pregnancy
Pregnancy in Diabetes
Type 1 Diabetes Mellitus
Type 2 Diabetes Mellitus

干预/治疗

Other: blood tests

Other: diet questionnaire

Other: umbilical cord blood collect

Other: placenta collect

-

手臂组

干预/治疗
Other: type 1 diabetic pregnant women
type 1 diabetic pregnant women
Other: type 2 diabetic pregnant women
type 2 diabetic pregnant women
Other: healthy pregnant women
healthy pregnant women with normal glucose tolerance

资格标准

有资格学习的年龄 18 Years 至 18 Years
有资格学习的性别Female
接受健康志愿者
标准

Inclusion Criteria:

- pregnant women included before 16 amenorrhea weeks

Exclusion Criteria:

- obesity (BMI > 40kg/m2)

- subject became pregnant with medical infertility treatment

- tobacco > 10

- suspected abuse of alcohol

结果

主要结果指标

1. fetal weight corrected by gestational age [just after delivery]

次要成果指标

1. cholesterol (total, HDL, LDL) [3 measures during pregnancy and 1 at post partum, 1 measure at time of delivery from fetal cord]

2. triglycerides [3 measures during pregnancy and 1 at post partum, 1 measure at time of delivery from fetal cord]

3. Apolipoprotein A/B rate [3 measures during pregnancy and 1 at post partum, 1 measure at time of delivery from fetal cord]

4. erythrocytary and plasmatic fatty acid distribution [3 measures during pregnancy and 1 at post partum, 1 measure at time of delivery from fetal cord]

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