体细胞的直接重编程是由母体转录因子Glis1促进的
Momoko Maekawa1, Kei Yamaguchi, Tomonori Nakamura
1Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan.
Nature
|June 10, 2011
概括
通过OSK因子,Glis1显著提高了诱导多能干细胞 (iPSC) 生产效率. 这一发现增强了体细胞的重编程,为产生iPSCs提供了更有效的方法.
科学领域:
- 干细胞生物学 干细胞生物学
- 分子生物学分子生物学
- 发育生物学是发展生物学.
背景情况:
- 诱导多能干细胞 (iPSC) 是通过特定的转录因子 (OSK) 从体细胞生成的.
- 目前用于iPSC生成的方法通常是低效的,并且Myc的加入,虽然提高了效率,但增加了瘤性.
- 为了提高重编程效率和安全性,识别新的因素对于再生医学至关重要.
研究的目的:
- 研究转录因子Glis1 (Glis家族指1) 在提高iPSC生成效率方面的潜力.
- 评估使用Glis1与OSK因子结合生成的iPSC的特征.
- 阐明Glis1促进细胞重编程的分子机制.
主要方法:
- 从小鼠和人类的纤维细胞被使用OSK转录因子重新编程为iPSC,有或没有Glis1.
- 产生的iPSCs被评估为多能性和它们形成生殖线相称的喜马拉 (在小鼠中) 的能力.
- 进行了DNA微阵列分析,以确定由Glis1表达影响的亲重编程途径.
主要成果:
- 当与OSK联合表达时,Glis1显著提高了来自小鼠和人类纤维细胞的iPSCs的生成效率.
- 使用Glis1和OSK生成的老鼠iPSC能够形成具有生殖线能力的驼.
- 发现Glis1表达在卵细胞和早期胚胎中被丰富.
- 微阵列数据表明,Glis1促进了关键的重编程途径,包括Myc,Nanog,Lin28,Wnt,Essrb和介质细胞-上皮细胞过渡.
结论:
- Glis1是一种强大的体细胞重编程成iPSC的增强剂.
- 使用Glis1与OSK结合使用,为iPSC生成提供了一种更有效和潜在的更安全的方法.
- Glis1在促进多个亲重编程途径中的作用突显了它在直接细胞重编程中的重要性.
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