外源性OCT4和SOX2对牛体内再编程的贡献
Lucas Simões Machado1, Camila Martins Borges1, Marina Amaro de Lima1
1Post-Graduate Program of Anatomy of Domestic and Wild Animals, Faculty of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo 05508-270, SP, Brazil.
Biomedicines
|September 28, 2023
概括
在牛细胞中研究OCT4和SOX2发现,虽然这些因素影响了重编程,但细胞分类对诱导多能干细胞生成产生了负面影响. 核转移效率不受捐赠细胞多能性基因表达特征的影响.
科学领域:
- 细胞生物学 细胞生物学
- 发展生物学 发展生物学
- 遗传学 遗传学 是一个
背景情况:
- 与多能性相关的转录因子,如OCT4和SOX2,对于细胞重编程至关重要.
- 体细胞核转移 (SCNT) 是产生克隆胚胎和研究重编程的关键技术.
- 了解转录因子和SCNT之间的相互作用对于推进再生医学至关重要.
研究的目的:
- 研究OCT4和SOX2在牛细胞重编程和SCNT中的作用.
- 分析外源性OCT4和SOX2表达对多能性和印记基因的影响.
- 为了比较体外重编程和SCNT使用具有不同多能因子表达的细胞的效率.
主要方法:
- 牛纤维细胞被改造为表达OCT4,SOX2或两者.
- 进行了对多能性因子和印记基因 (H19,IGF2R) 的基因表达分析.
- 在体外重编程和SCNT实验中使用分类和未分类的供体细胞进行.
- 在SCNT后评估了胚胎发育率 (融合,裂变,胚胎囊).
主要成果:
- 外源性OCT4和SOX2表达改变了多能性基因配置文件,在排序的细胞中增加了H19表达.
- 假定诱导的多能干细胞类干细胞是在重新编程前未进行细胞分类时生成的.
- 使用分类OCT4或SOX2表达细胞的SCNT产生了可比的融合,分裂和胚胎细胞率来控制细胞.
- 与未排序细胞相比,排序细胞的体外重编程效率受到损害.
结论:
- 虽然OCT4和SOX2在细胞重编程中发挥作用,但它们的外源表达在体外并没有显著改变SCNT衍生的胚胎发育能力.
- 在SCNT之前的细胞分类可能会对诱导的重编程产生负面影响,这表明需要优化协议.
- 这项研究突出了多能性和重编程背后的复杂机制,对未来的干细胞研究和治疗应用有影响.
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