Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 23, Issue 14, Pages -Publisher
MDPI
DOI: 10.3390/ijms23148003
Keywords
placenta; iPS cells; fetal growth retardation; hypertensive disorders of pregnancy; pregnancy; gestational diabetes
Funding
- Japan Society for the Promotion of Science [18K09301, 22K09556, 22K16866]
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The placenta is crucial for establishing pregnancy and fetal well-being in humans, allowing for maternal physiological adaptation and embryonic immunological acceptance. Placental tissue varies widely among species, making it challenging to directly apply findings from animal studies to human research. Artificial induction of early villous differentiation can potentially elucidate the causes of perinatal diseases and aid in the development of novel therapies.
In humans, the placenta provides the only fetomaternal connection and is essential for establishing a pregnancy as well as fetal well-being. Additionally, it allows maternal physiological adaptation and embryonic immunological acceptance, support, and nutrition. The placenta is derived from extra-embryonic tissues that develop rapidly and dynamically in the first weeks of pregnancy. It is primarily composed of trophoblasts that differentiate into villi, stromal cells, macrophages, and fetal endothelial cells (FEC). Placental differentiation may be closely related to perinatal diseases, including fetal growth retardation (FGR) and hypertensive disorders of pregnancy (HDP), and miscarriage. There are limited findings regarding human chorionic villous differentiation and placental development because conducting in vivo studies is extremely difficult. Placental tissue varies widely among species. Thus, experimental animal findings are difficult to apply to humans. Early villous differentiation is difficult to study due to the small tissue size; however, a detailed analysis can potentially elucidate perinatal disease causes or help develop novel therapies. Artificial induction of early villous differentiation using human embryonic stem (ES) cells/induced pluripotent stem (iPS) cells was attempted, producing normally differentiated villi that can be used for interventional/invasive research. Here, we summarized and correlated early villous differentiation findings and discussed clinical diseases.
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