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Placenta-specific 1 regulates oocyte meiosis and fertilization through furin.
FASEB Journal : Official Publication of the Federation of American Societies for Experimental Biology 2018 October
Placenta-specific 1 (Plac1) has been found to be essential for placentation, and abnormal Plac1 expression and distribution is highly correlated with preeclampsia and implantation failure; however, its function in mammalian oocytes has not been elucidated. Here, we report that Plac1 was more prominent in mouse oocytes and enriched at the membrane region throughout meiosis. On the one hand, Plac1 knockdown severely disrupted microvillus organization; however, on the other hand, Plac1 significantly decreased oocyte maturation and increased aneuploidy, consequently disrupting normal fertilization. On the basis of immunoprecipitate matrix-assisted laser desorption/ionization, we established a working model, then verified and suggested that, at the germinal vesicle stage, Plac1 enriches the membrane to activate furin, and active furin subsequently activates IGF-1 receptor to maintain regular microvillus organization. Upon meiosis onset, active furin/IGF-1 receptor relocates into the cytoplasm to activate (phosphorylate) Akt to promote meiosis. In summary, our finding suggests that Plac1, a protein that is crucial for placentation, is also essential for oocyte meiosis and fertilization.-Shi, L.-Y., Ma, Y., Zhu, G.-Y., Liu, J.-W., Zhou, C.-X., Chen, L.-J., Wang, Y., Li, R.-C., Yang, Z.-X., Zhang, D. Placenta-specific 1 regulates oocyte meiosis and fertilization through furin.
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