牛,胚胎发育,卵丘细胞,凋亡,增殖," /> 牛,胚胎发育,卵丘细胞,凋亡,增殖,"/> bovine,embryonic development,cumulus cells,apoptosis,proliferation,"/> <font face="Verdana">卵丘细胞凋亡与增殖对牛卵母细胞体外发育的影响</font>

中国农业科学 ›› 2011, Vol. 44 ›› Issue (8): 1702-1709 .doi: 10.3864/j.issn.0578-1752.2011.08.020

• 畜牧·资源昆虫 • 上一篇    下一篇

卵丘细胞凋亡与增殖对牛卵母细胞体外发育的影响

李海军1,靳木子2,张睿彪3,杜晨光1,刘东军2,仓 明2   

  1. 1.内蒙古农业大学兽医学院
    2.内蒙古大学生命科学学院/哺乳动物生殖生物学及生物技术教育部重点实验室
    3.包头稀土高新区滨河新区管委会
  • 收稿日期:2011-01-04 修回日期:2011-03-10 出版日期:2011-04-15 发布日期:2011-04-15
  • 通讯作者: 刘东军

Effect of Cumulus Cell Apoptosis and Proliferation on Bovine Oocyte Development in vitro

LI Hai-jun1, JIN Mu-zi2, ZHANG Rui-biao3, DU Chen-guang1, LIU Dong-jun2, CANG Ming2   

  1. 1.内蒙古农业大学兽医学院
    2.内蒙古大学生命科学学院/哺乳动物生殖生物学及生物技术教育部重点实验室
    3.包头稀土高新区滨河新区管委会
  • Received:2011-01-04 Revised:2011-03-10 Online:2011-04-15 Published:2011-04-15
  • Contact: Dong-Jun liu

摘要: 【目的】探讨卵丘-卵母细胞复合体(COCs)形态、卵丘细胞凋亡与增殖状态和卵母细胞发育能力之间的相关性。【方法】根据卵胞质均匀程度和卵丘细胞层数等形态指标,对所挑选的未成熟COCs进行分组,随后利用体外受精技术和TUNEL技术,并结合流式细胞仪,评价各组COCs的体外发育能力及其卵丘细胞凋亡和细胞周期差异。【结果】 与包被5层以上致密卵丘且卵胞质均质的COCs相比,具有2—5层轻度扩散卵丘与颗粒化卵质特征的COCs显示较好的后续胚胎发育潜力、较高的卵丘细胞凋亡程度和较低的G2-M期细胞比率。【结论】 卵丘细胞凋亡程度与未成熟卵母细胞发育潜能呈正相关;COCs形态、卵丘细胞凋亡或者G2-M期细胞比率指标可以用来指示未成熟卵母细胞的发育潜力。

关键词: 牛')">牛, 胚胎发育, 卵丘细胞, 凋亡, 增殖

Abstract:

【Objective】The aim of this study was to investigate the relationship between the appearance of bovine cumulus-oocyte complexes (COCs) and apoptosis or proliferation of cumulus cells and oocyte developmental capacity.【Method】Cumulus-oocyte complexes (COCs) were selected and classified into 4 groups according to oocyte cytoplasm and cumulus status. Apoptosis and cell cycle of cumulus cells from each group were detected by TUNEL staining combined with flow cytometry. Developmental competence was evaluated by development rates at different stages following in vitro fertilization.【Result】Results indicated that, compared to the COCs with five or more layers of cumulus cells and homogeneous ooplasm, that with two-five layers of cumulus cells and slight granulation of the ooplasm showed the highest TUNEL positive ratio of cumulus cells and subsequent embryo developmental potential.【Conclusion】It indicated that apoptosis in cumulus cells is associated with improved developmental potential in bovine immature oocytes, and it makes good markers for embryo development of COCs morphology, apoptosis and the ratio to the stage of G2-M in cumulus cells.

Key words: bovine')">bovine, embryonic development, cumulus cells, apoptosis, proliferation