畜牧兽医学报 ›› 2015, Vol. 46 ›› Issue (7): 1141-1149.doi: 10.11843/j.issn.0366-6964.2015.07.009

• 遗传繁育 • 上一篇    下一篇

牛囊胚ICM克隆多能性标记基因与表面标记的研究

崔莉莎1,2,赵学明2,郝海生2,杜卫华2,马友记1,朱化彬2*,王宗礼1*   

  1. (1.甘肃农业大学动物科学技术学院,兰州 730070; 2.中国农业科学院北京畜牧兽医研究所,北京 100193)
  • 收稿日期:2015-01-05 出版日期:2015-07-23 发布日期:2015-07-20
  • 通讯作者: 朱化彬,博士,研究员,E-mail:zhuhuabin@caas.cn;王宗礼,博士,研究员,E-mail:Wangzongli@sina.com
  • 作者简介:崔莉莎(1989-),女,山东菏泽人,硕士生,主要从事动物遗传育种与繁殖方面的研究,E-mail:cuilishaxz@163.com
  • 基金资助:

    中国农业科学院北京畜牧兽医研究所家畜胚胎工程与繁殖创新团队(ASTIP-IAS06-2014);中央级公益性科研院所基本科研业务费专项(2014ywf-yb-2)

The Research of Pluripotency-related Marker Genes and Surface Markers in Bovine ICM Colonies

CUI Li-sha 1,2,ZHAO Xue-ming 2,HAO Hai-sheng 2,DU Wei-hua 2,MA You-ji1,ZHU Hua-bin 2*,WANG Zong-li1*   

  1. (1.College of Animal Science and Technology,Gansu Agricultural University,Lanzhou 730070,China;2.Institute of Animal Science,Chinese Academy of Agricutural Sciences,Beijing 100193,China)
  • Received:2015-01-05 Online:2015-07-23 Published:2015-07-20

摘要:

本研究旨在探究牛类胚胎干细胞(Embryonic stem cells,ES)的多能性标记基因与表面标记,为优化牛类ES细胞培养条件和相关研究提供依据。利用2i/LIF培养液,通过全胚接种及机械传代法分离培养牛囊胚内细胞团(Inner cell mass,ICM),免疫荧光染色法检测其多能性标记基因与表面标记;qRT-PCR检测免疫磁珠法分选的牛囊胚ICM和滋养层细胞(Trophectoderm cell,TE)的多能性标记基因的差异表达结果。试验成功分离出了牛囊胚ICM克隆,并体外培养至第10代,且各代克隆均呈现出了典型的干细胞形态。结果表明,ICM表面标记SSEA1、SSEA4和TRA-1-60染色为阳性,且多能性标记基因OCT4、SOX2和NANOG在其中均有表达;OCT4SOX2和NANOG在牛囊胚ICM和TE中的表达存在差异(P<0.05),其中 SOX2 的差异极显著(P<0.01)。综上表明,2i/LIF培养液有助于牛囊胚ICM的培养;SOX2可能成为牛ICM克隆的候选多能性标记基因。

关键词: 牛, ICM, 多能性标记, qRT-PCR

Abstract:

This study was designed to investigate the pluripotency-related markers of bovine ES cells so as to provide a basis for optimizing culture conditions of bovine ES cells and promoting its research progress.The inner cell mass (ICM) were separated from bovine IVF blastocysts,seeded on mouse embryonic fibroblasts cultured in 2i/LIF medium and then passaged mechanically.The pluripotent markers of the ICM-derived colonies were detected at passage 1 and passage 10 by immunostaining.Additionally,the ICM and trophectoderm (TE) isolated from bovine blastocysts by magnetic activated cell sorting were used for qRT-PCR to validate the differences in gene expression between ICM and TE.We have derived ICM colonies from bovine IVF blastocysts and cultured them to passage 10,which displayed typical stem cell morphology and expressed specific markers such as OCT4,SOX2,NANOG,SSEA1,SSEA4 and TRA-1-60.Moreover,the results of qRT-PCR showed that OCT4,SOX2 and NANOG were differentially expressed between ICM and TE,SOX2 showed the most significant difference.In conclusion,2i/LIF culture medium is helpful for the culture of the ICM-derived colonies from bovine IVF blastocysts,and SOX2 is more likely to be a candidate pluripotency-related marker gene of bovine ICM-derived colonies.

Key words: bovine, ICM, pluripotency-related marker, qRT-PCR

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