基础医学与临床 ›› 2019, Vol. 39 ›› Issue (5): 673-676.

• 研究论文 • 上一篇    下一篇

小鼠卵母细胞减数分裂过程中PAK1与survivin的亚细胞定位和蛋白水平相关

王思敏1,周晴1,王倩2,梁元晶1,翁静1,马伟1   

  1. 1. 首都医科大学
    2. 首都医科大学基础医学院
  • 收稿日期:2018-12-05 修回日期:2019-01-25 出版日期:2019-05-05 发布日期:2019-04-24
  • 通讯作者: 马伟 E-mail:mawei1026@ccmu.edu.cn
  • 基金资助:
    北京市自然基金

PAK1 correlation with the subcellular localization and protein level of survivin in mouse oocyte meiosis

  • Received:2018-12-05 Revised:2019-01-25 Online:2019-05-05 Published:2019-04-24

摘要: 目的 研究小鼠卵母细胞减数分裂进程中,活化的PAK1(pPAK1Thr423)在survivin的时空定位和蛋白水平维持中的相关性。方法 利用免疫荧光染色法分析减数分裂进程中 pPAK1Thr423与survivin的时空相关性;利用Western blot分析PF3758309对survivin蛋白水平的影响。结果 在小鼠卵母细胞第一次减数分裂中期(MI),pPAK1 Thr423和survivin共同聚集在MI期同源染色体臂间以及着丝粒上,在第二次减数分裂中期(MII),两者仍旧共同集中在着丝粒上,其在染色体臂间的聚集仅限于姊妹着丝粒之间的区域;PF3758309处理引起survivin蛋白水平的降低。结论 小鼠卵母细胞减数分裂过程中pPAK1 Thr423可能通过调控survivin在染色体臂间和着丝粒上的聚集和有效水平的维持而参与CPC调控染色体分离的过程。

关键词: 小鼠, 卵母细胞, 减数分裂, pPAK1Thr423 , survivin

Abstract: Objective To study the relationship of activated PAK1 (pPAK1Thr423) with the subcellular localization and protein level maintenance of survivin in the meiotic progression of mouse oocytes. Methods Immunofluorescent staining was employed to analyze the spatial-temporal correlation between pPAK1Thr423 and survivin during oocyte meiosis; Western blot was applied to analyze the change of survivin level in oocytes treated with PF3758309. Results In mouse oocytes at metaphase I stage (MI), pPAK1Thr423 was co-localized with survivin between chromosome arms and on centromeres of homologous chromosomes, the centromeric co-lozalization remained at metaphase II stage (MII), while that across chromosome axis was confined in the local space between sister centromeres. The protein level of survivin was significantly decreased in oocytes treated with PF3758309. Conclusions pPAK1Thr423 may regulate the subcellular localization and protein maintenance of survivin, so as to participate in CPC regulating chromosome separation in mouse oocyte meiosis.

Key words: mouse, oocyte, meiosis, pPAK1Thr423, survivin

中图分类号: