生物技术通报 ›› 2013, Vol. 0 ›› Issue (2): 86-92.

• 研究报告 • 上一篇    下一篇

奶牛体细胞核移植胚胎产业化生产条件优化

孙伟1 巴特尔1 郭继彤1 李荣凤2 王建国2 李明1 胡树香1 王春生1 李喜和1,3   

  1. (1. 内蒙古赛科星繁育生物技术股份有限公司,呼和浩特 011517; 2. 内蒙古大学哺乳动物生殖生物学及生物技术教育部重点实验室,呼和浩特 010021; 3. 内蒙古大学蒙古高原动物遗传资源研究中心,呼和浩特 010021)
  • 收稿日期:2012-08-03 修回日期:2013-02-27 出版日期:2013-02-26 发布日期:2013-02-27
  • 作者简介:孙伟,男,硕士,助理研究员,研究方向:动物生殖生物学与生物技术; E-mail :swzyh769500@163.com
  • 基金资助:
    内蒙古自治区“呼和浩特市科技计划项目”(2010-农-6)

Optimization of Production Conditions for Dairy Cows Somatic Cell Nuclear Transfer Embryos

Sun Wei1 Ba Teer1 Guo Jitong1 Li Rongfeng2 Wang Jianguo2 Li Ming1 Hu Shuxiang1 Wang Chunsheng1 Li Xihe1,3   

  1. (1. Inner Mongolia Saikexing Reproductive Biotechnology Co.,Ltd,Huhhot 011517 ;2. The Key Laboratory of Mammalian Reproductive Biology and Biotechnology of the Ministry of Education,Inner Mongolia University,Hohhot 010021 ;3. Institute for Animal Genetic Resources of Mongolia Plateau Inner Mongolia University,Huhhot 010021)
  • Received:2012-08-03 Revised:2013-02-27 Published:2013-02-26 Online:2013-02-27

摘要: 通过优化高产奶牛体细胞克隆胚胎体外生产技术条件,制备高质量的奶牛克隆胚胎,旨在提高奶牛体细胞核移植产业化应用效率。就受体卵母细胞去核方法、不同年龄供体牛细胞来源、血清饥饿与否以及不同气相组成培养等条件对奶牛体细胞克隆胚胎生产效率的影响进行了研究和探讨。结果表明,虽然荧光染色辅助去核和盲吸法的去核率、囊胚发育率分别为100%、24.83% 和92.44%、28.26%,两者之间无显著差异(P>0.05),但盲吸法操作简单、效率高;不同年龄来源供体牛的细胞系构建的克隆胚胎的囊胚发育率分别为31.43%、25.68%,两者之间没有显著差异(P>0.05);经血清饥饿和未饥饿供体细胞重构的克隆胚胎囊胚发育率分别为24%、29.9%,两者之间没有显著差(P>0.05);富氧和低氧气相培养的克隆胚胎的囊胚发育率分别为28.26%、31.55%,两者之间差异不显著(P>0.05),低氧气相组成更有利于囊胚的发育。根据上述结果,奶牛体细胞核移植胚胎(克隆胚胎)的产业化生产条件为:供体细胞无需进行同期饥饿处理,直接注入到盲吸去核后的受体卵子透明带下构建克隆胚胎,融合后的克隆胚胎在密封的混合三气(5% CO2-5% O2-90% N2)的气相组成下进行体外培养,能保持稳定的囊胚发育率。

关键词: 奶牛, 体细胞, 去核, 核移植, 重构胚胎

Abstract: The purpose of the study was to improve the total industrial application efficiency of dairy cow somatic cell nuclear transfer (SCNT)by optimazing the in vitro producting conditions of dairy cow SCNT embryos. In this study, the effect of different factors, such as enucleation method, sources of donor cell different ages cows, serum starvation, and gas component condition, on the efficiency of SCNT were studied. The results demonstrated that there were no significant differences on the rate of enucleation and the rate of blastocyst(100% and 24.83% in the fluorescent-assistant group and 92.44% and 28.26% in the blind-suction group, respectively)(P>0.05). However, the method of blind-suction was easier to operate and more efficiency. The age of donor cows showed no significant impact on the rate of blastocyst(31.43% and 25.68%, respectively). There was no significant difference on the rate of blastocyst between serum-starvation and non-starvation group(24% and 29.9%, respectively), and there was no significant difference on the rate of blastocyst between high-oxygen and low-oxygen group(28.26% and 31.55%, repsctively). Conclusionly, the results showed that the optimized condition for industrial production of dairy cow SCNT embryos was as follows :donor cells without serum-starvation could be injected into ooplasm enucleated by blind-suction to construct cloned embryos. Then, fused cloned embrys should be cultured under sealed condition with 5% CO2, 5% O2, and 90% N2 to get a reasonable rate of blastocyst.

Key words: Dairy cows, Somatic cell, Ennuclear, Nuclear transfer, Reconstructed embryos