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通过双细胞小鼠胚胎的相间细胞质进行核重编程.
Eunju Kang1, Guangming Wu2, Hong Ma1
1Division of Reproductive and Developmental Sciences, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, Oregon 97006, USA.
Nature
|March 28, 2014
概括
有效的哺乳动物克隆是可以使用来自双细胞胚胎的相间细胞质,特别是当细胞周期阶段同步时. 在体细胞核转移 (SCNT) 的这一突破为再生医学提供了新的途径.
科学领域:
- 生殖生物学 生殖生物学
- 发展生物学 发展生物学
- 干细胞科学 干细胞科学
背景情况:
- 体细胞核转移 (SCNT) 依赖于卵细胞细胞质中的重编程因素.
- 这些因素被认为在受精后会下降,使得胚胎细胞质对重编程不那么有效.
- 以前的研究表明,甲相细胞质是关键的,而相间细胞质是不活跃的.
研究的目的:
- 为了研究两细胞介质小鼠胚胎 (I2C) 的细胞质中的重编程活动.
- 为了确定细胞周期同步是否对SCNT成功至关重要,使用相间细胞质.
- 探索I2C细胞质产生胚胎干细胞和活后代的潜力.
主要方法:
- 在完整和无核的胚胎和双细胞胚胎中记录了候选重编程因子.
- 使用各种捐赠细胞核和同步I2C细胞质重建的SCNT胚胎.
- 将克隆胚胎转移到受体雌性体内,以评估发育潜力和活产.
主要成果:
- 核化并不是介相细胞质中重编程失败的原因.
- 用同步I2C细胞质重建的SCNT胚胎发展为胚芽细胞和ES细胞.
- 克隆胚胎产生了活着的后代,证明了高效的重编程和发展潜力.
结论:
- 两个细胞胚胎的细胞质支持通过SCNT高效的重编程.
- 捐赠核和受体细胞质之间的细胞周期同步是成功的关键因素.
- 在SCNT中利用相间细胞质可以促进用于再生医学的自身人体ES细胞的生成.
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