例如:"lncRNA", "apoptosis", "WRKY"

NEK5 regulates cell cycle progression during mouse oocyte maturation and preimplantation embryonic development.

Mol. Reprod. Dev.2019 Sep;86(9):1189-1198. doi:10.1002/mrd.23234. Epub 2019 Jul 15
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摘要


NEK5, a member of never in mitosis-gene A-related protein kinase, is involved in the regulation of centrosome integrity and centrosome cohesion at mitosis in somatic cells. In this study, we investigated the expression and function of NEK5 during mouse oocyte maturation and preimplantation embryonic development. The results showed that NEK5 was expressed from germinal vesicle (GV) to metaphase II (MII) stages during oocyte maturation with the highest level of expression at the GV stage. It was shown that NEK5 localized in the cytoplasm of oocytes at GV stage, concentrated around chromosomes at germinal vesicle breakdown (GVBD) stage, and localized to the entire spindle at prometaphase I, MI and MII stages. The small interfering RNA-mediated depletion of Nek5 significantly increased the phosphorylation level of cyclin-dependent kinase 1 in oocytes, resulting in a decrease of maturation-promoting factor activity, and severely impaired GVBD. The failure of meiotic resumption caused by Nek5 depletion could be rescued by the depletion of Wee1B. We found that Nek5 depletion did not affect CDC25B translocation into the GV. We also found that NEK5 was expressed from 1-cell to blastocyst stages with the highest expression at the blastocyst stage, and Nek5 depletion severely impaired preimplantation embryonic development. This study demonstrated for the first time that NEK5 plays important roles during meiotic G2/M transition and preimplantation embryonic development.

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