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Extracellular vesicles: Focus on peri-implantation period of pregnancy in pigs

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WILEY
DOI: 10.1002/mrd.23664

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cell-cell communication; embryo; endometrium; extracellular vesicles; implantation; pregnancy

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The establishment of cell-to-cell communication is crucial for successful mammalian pregnancy. Extracellular vesicles (EVs) carrying unique molecular cargo have been identified as mediators of this communication during early pregnancy. However, the mechanism of EV-mediated crosstalk between early embryos and the endometrium needs further investigation. Understanding the role of EVs in mammalian reproduction can greatly enhance our knowledge of successful reproductive performance.
The establishment of cell-to-cell communication between the endometrium and the developing embryo is the most important step in successful mammalian pregnancy. Close interaction between the uterine luminal epithelium and trophoblast cells requires triggering timely molecular dialog for successful maternal recognition of pregnancy, embryo implantation, and placenta development. Quite recently, extracellular vesicles (EVs) carrying unique molecular cargo emerged as evolutionarily conserved mediators of cell-to-cell communication during early pregnancy. To date, the presence of EVs at the embryo-maternal interface has been demonstrated in numerous mammals, including domestic livestock, such as pigs. However, few studies have focused on revealing the mechanism of EV-mediated crosstalk between developing early embryos and receptive endometrium. Over the past years, it has appeared that understanding the role of EVs in mammalian reproduction can substantially improve our understanding of the biological challenges of successful reproductive performance. This review describes current knowledge of EVs, specifically in relation to the peri-implantation period in pigs, characterized by common features of embryo implantation and high embryonic mortality in mammals.

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