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The placenta, a unique organ that helps maintain a healthy pregnancy, plays a pivotal role in maternal adaptation to pregnancy and releases extracellular vesicles (EVs), autacoids, and hormones. EVs are membranous vesicles released by all types of cells, including placental trophoblasts, which are involved in intracellular communication by delivering their cargo, such as proteins, nucleic acids, and lipids, to the targeted cells in a neighboring or distant location. Recently, an increasing number of publications have reported that EVs secreted from the placenta into maternal circulation deliver their cargo to maternal organs and mediate placenta-to-maternal communication during pregnancy. This review provides an overview of the transport mechanism of placenta-derived EVs to maternal organs.
Inagaki et al. (2022) studied this question.