Pregnancy-associated hormones and fetal-maternal relations

Annales d'endocrinologie
E Gailly-FabreS Christin-Maitre

Abstract

Pregnancy is an immunological paradox that implies that a semi-allogeneic fetus is not rejected by the maternal immune system, from implantation of the embryo to delivery. Progesterone (P4), estradiol (E2) and human chorionic gonadotropin (hCG), contribute to the transformation of immune cells in a transient tolerance state, necessary to the maintenance of pregnancy. The effects of pregnancy hormones depend probably of their maternal plasma level. hCG is dangerous at high concentrations because it can stimulate autoantibodies production, whereas in physiological concentrations, hCG, P4 and E2 upregulate immune response expanding regulatory T and B cells, allowing the fetus to grow within the maternal uterus in a protective environment. A second example of fetal-maternal relation found recently is the role of maternal nutrition on development of the fetal hypothalamic neurons. Experiments in mice fed on a high fat diet reveal a critical timing when altered maternal metabolism affect formation of hypothalamic neurocircuits of the offspring and predispose him to long-term metabolic disorders.

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Citations

May 31, 2019·Endocrine, Metabolic & Immune Disorders Drug Targets·Katia C OliveiraMonica C Botelho
Mar 22, 2019·Molecular Medicine Reports·So-Hye HongBeum-Soo An

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