Assisted Reproduction Causes Reduced Fetal Growth Associated with Downregulation of Paternally Expressed Imprinted Genes That Enhance Fetal Growth in Mice

Biology of Reproduction
Bo LiXiaohong Wang

Abstract

Alteration of intrauterine growth trajectory is linked to metabolic diseases in adulthood. In mammalian and, specifically, human species, pregnancies through assisted reproductive technology (ART) are associated with changes in intrauterine growth trajectory. However, it is still unclear how ART alters intrauterine growth trajectory, especially reduced fetal growth in early to midgestation. In this study, using a mouse model, it was found that ART procedures reduce fetal and placental growth at Embryonic Day 10.5. Furthermore, ART leads to decreased methylation levels at H19, KvDMR1, and Snrpn imprinting control regions in the placentae, instead of fetuses. Furthermore, in the placenta, ART downregulated a majority of parentally expressed imprinted genes, which enhance fetal growth, whereas it upregulated a majority of maternally expressed genes which repress fetal growth. Additionally, the expression of genes that regulate placental development was also affected by ART. ART also downregulated a majority of placental nutrient transporters. Disruption of genomic imprinting and abnormal expression of developmentally and functionally relevant genes in placenta may influence the placental development and function, which affect feta...Continue Reading

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Citations

Feb 2, 2018·Molecular Reproduction and Development·Yifan RaoYan Liu
Feb 20, 2018·Molecular Reproduction and Development·Veronique Duranthon, Pascale Chavatte-Palmer
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Dec 18, 2020·Biology of Reproduction·Maria Florencia Heber, Grażyna Ewa Ptak
Apr 17, 2021·Reproductive Biology·Meng XiangYuan Ma

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