Background : Apelin and its receptor APJ have been implicated in pathologies including cardiovascular disease, diabetes and obesity. Little is known about the function of the apelinergic system during gestation. Objective : The main objective of this study is to compare apelinemia in fasting normal weight and obese women at the end of pregnancy, between 35 and 41 weeks of gestation (WG). Strategy and method: A prospective research evaluating will be conducted to compare apelinemia in fasting normal weight and obese women at the end of pregnancy, between 35 and 41 weeks of gestation (WG). A third group will be created to check if gestational diabetes is not a confounding factor in obesity (group of obese women with gestational diabetes). Investigators will try to see if apelinemia is correlated to lipidic and glycemic markers. Samples will be collected in the cord blood to compare maternal and neonatal apelinemia and to see if neonatal apelinemia is correlated to the child's weight and birth size and to the weight of the placenta. Placenta samples will be collected and RT-qPCR will be done to analyze RNA in each group. Two days after delivery, obese and not obese women will be fasted and plasma and colostrum will be collected. Investigators will compare apelin levels in the colostrum between these 2 groups and then investigators will try to see if apelin level is correlated in the colostrum and in maternal plasma.
Background : Apelin and its receptor APJ have been implicated in pathologies including cardiovascular disease, diabetes and obesity. Little is known about the function of the apelinergic system during gestation. In a previous study, investigators evaluated in mice this system at the feto-maternal interface in insulin-resistant obese female (HF) mice. Maternal apelinemia was decreased at term and fetal apelinemia was sixfold higher than maternal level. Ex-vivo, the placenta releases high amount of apelin at E12.5 and E18.5. In HF pregnant mice at term, apelinemia as well as placental apelin and APJ mRNA levels were increased whereas placental release of apelin was drastically reduced.
Study Type
OBSERVATIONAL
Enrollment
135
Hôpital Jeanne de Flandre - CHRU de Lille
Lille, France
Biological measure : Maternal apelinemia (Plasma Concentration)
plasma sample
Time frame: between 35 and 41 weeks of gestation (WG)
Biological measure : Neonatal apelinemia (Plasma Concentration)
plasma sample
Time frame: the day of the delivery
Biological measure : Maternal apelinemia (Plasma Concentration)
plasma sample
Time frame: the day of the delivery and 2 days after the delivery
apelin level in the colostrum
colostrum sample
Time frame: 2 days after the delivery
C-peptide
maternal plasma sample
Time frame: between 35 and 41 weeks of gestation (WG) and 2 days after the delivery
glycemia
maternal plasma sample
Time frame: between 35 and 41 weeks of gestation (WG) and 2 days after the delivery
insulinemia
maternal plasma sample
Time frame: between 35 and 41 weeks of gestation (WG) and 2 days after the delivery
C-peptide
neonatal plasma sample
Time frame: the day of the delivery
glycemia
neonatal plasma sample
Time frame: the day of the delivery
insulinemia
neonatal plasma sample
Time frame: the day of the delivery
total cholesterol
maternal plasma sample
Time frame: between 35 and 41 weeks of gestation (WG) and 2 days after the delivery
HDL
maternal plasma sample
Time frame: between 35 and 41 weeks of gestation (WG) and 2 days after the delivery
LDL
maternal plasma sample
Time frame: between 35 and 41 weeks of gestation (WG) and 2 days after the delivery
triglycerides
maternal plasma sample
Time frame: between 35 and 41 weeks of gestation (WG) and 2 days after the delivery
apolipoprotein A
maternal plasma sample
Time frame: between 35 and 41 weeks of gestation (WG) and 2 days after the delivery
apolipoprotein B
maternal plasma sample
Time frame: between 35 and 41 weeks of gestation (WG) and 2 days after the delivery
total cholesterol
neonatal plasma sample
Time frame: the day of the delivery
Biological measure : HDL
neonatal plasma sample
Time frame: the day of the delivery
Biological measure : LDL
neonatal plasma sample
Time frame: the day of the delivery
triglycerides
neonatal plasma sample
Time frame: the day of the delivery
apolipoprotein A
neonatal plasma sample
Time frame: the day of the delivery
apolipoprotein B
neonatal plasma sample
Time frame: the day of the delivery
BMI
measure maternal gain of weight before pregnancy and during pregnancy in maternal declaration
Time frame: at baseline
Infant weight
Time frame: within 2 days of postpartum
Infant size
Time frame: within 5 days of postpartum
Placenta weight
Time frame: the days of the delivery
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