畜牧兽医学报 ›› 2014, Vol. 45 ›› Issue (9): 1424-1431.doi: 10.11843/j.issn.0366-6964.2014.09.007

• 遗传繁育 • 上一篇    下一篇

C型钠肽预处理对牛卵母细胞体外成熟的影响

张春强,欧阳效晴,张通,栗瑞兰,范晓梅,张家新*   

  1. (内蒙古自治区动物遗传育种与繁殖重点实验室,内蒙古农业大学动物科学学院,呼和浩特 010018)
  • 收稿日期:2014-03-13 出版日期:2014-09-23 发布日期:2014-09-23
  • 通讯作者: 张家新,博士,教授,博士生导师,E-mail:zjxcau@163.com
  • 作者简介:张春强(1980-),男,山东平邑人,博士,主要从事动物繁殖技术与胚胎工程研究,E-mail:zhangchunqiang000@163.com
  • 基金资助:

    国家科技支撑计划(2011BAD19B01);国家自然科学基金(31060307);公益性行业(农业)科研专项经费 (201003061)

Effects of C-type Natriuretic Peptide Pretreatment on in vitro Maturation of Bovine Oocyte

ZHANG Chun-qiang,OUYANG Xiao-qing,ZHANG Tong,LI Rui-lan,FAN Xiao-mei,ZHANG Jia-xin*   

  1. (Key Laboratory of Animal Genetics,Breeding and Reproduction,College of Animal Science,Inner Mongolia Agricultural University,Hohhot 010018,China)
  • Received:2014-03-13 Online:2014-09-23 Published:2014-09-23

摘要:

旨在研究C型钠肽(C-type natriuretic peptide,CNP)预处理对牛卵母细胞体外成熟(In vitro maturation,IVM)的影响。以常规的牛卵母细胞体外24 h成熟培养为对照,研究了CNP预处理牛卵母细胞6 h,再进行成熟培养28 h后(CNP预处理组)的牛卵母细胞成熟情况。结果表明,CNP预处理组的牛卵母细胞成熟效果明显提高,其受精后的囊胚率和囊胚细胞数都明显高于对照组((51.55%±2.50%),(156.2±11.0)和(28.13%±3.80%),(116.3±19.0),P<0.05);卵母细胞中线粒体分布由未成熟时的周边分布变为成熟时的均匀分布;而CNP预处理6 h的卵母细胞中线粒体多呈半周边分布,在随后的28 h成熟培养中也变为均匀分布;CNP预处理组的成熟卵母细胞线粒体DNA的拷贝数为(510 078.4±28 906.0),明显高于对照组的((416 558.5±51 743.0),P<0.05)。综上表明:C型钠钛预处理可以有效改善牛卵母细胞的体外成熟质量。

Abstract:

To study the in vitro maturation (IVM) of bovine oocyte pretreated with C-type natriuretic peptide (CNP).Compared with the conventional 24 h IVM culture,the effect of bovine oocytes pre-treated with CNP for 6 h following 28 h IVM culture (CNP pre-treated group) were studied.The results showed that the maturation of bovine oocyte in CNP pre-treated group were significantly improved,and the blastocyst rate and the cell number of blastocyst were significantly higher than those of the control group((51.55%±2.50%),(156.2±11.0)vs.(28.13%±3.80%),(116.3±19.0),P<0.05) after in vitro fertilization (IVF).The distribution of mitochondria ranged from peripheral distribution in unmatured oocyte to homogenous distribution throughout the cytoplasm in matured oocytes,while semi-peripheral distribution observed in the oocytes pretreated with CNP for 6 h,but then became homogenous distribution followed 28 h maturation culture.The mtDNA copy number of matured oocyte in CNP pre-treated group were (510 078.4±28 906.0),which was significantly higher than that of control group((416 558.5±51 743.0),P<0.05).The results indicated that the quality of bovine oocytes in vitro maturation pre-treated for 6 h with CNP could be improved effectively.

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