在小鼠胚胎干细胞中通过多复合体1调节PKCi介导的多能性和基因表达
Fangfang Wu1, Zhihui Liu1, Xiaohu Wu1
1Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University Nanjing 210046, Jiangsu, China.
蛋白激酶C抑制 (PKCi) 通过激活Polycomb抑制复合体1 (PRC1) 途径来维持小鼠胚胎干细胞 (mES) 的多能性. 这种表观遗传调节平衡了自我更新和分化,这对干细胞研究至关重要.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 干细胞生物学 干细胞生物学
- 分子生物学分子生物学
背景情况:
- 多胞体抑制综合体1 (PRC1) 对于调节胚胎干细胞 (ES) 多能性和自我更新至关重要.
- 已知抑制蛋白激酶C (PKCi) 在小鼠ES (mES) 中捕获和维持多能性.
研究的目的:
- 在PKCi-维持的mES中描述PRC1组件的动态表达模式 (PKCi-mES).
- 阐明PRC1作用机制在PKCi治疗下维持mES多能性.
主要方法:
- 在PKCi-mES,2iL-mES和MEF中对PRC1成分表达的比较分析 (RT-qPCR,西部斑块).
- 通过对差异表达的PRC1子单元进行功能验证,以评估对多能性和差异化标志物的影响.
主要成果:
- 在基因和蛋白质水平上,PKCi-mES表现出PRC1子单元RING1B,CBX7和RYBP的高表达.
- 淘汰Ring1b或Cbx7加速了mES分化,减少了多能性基因表达,并大大改变了谱系特异性基因表达.
结论:
- 在mES中,PKCi激活了正规和非正规的PRC1通路.
- 通过PKCi激活PRC1对于微调多能性和发育性基因表达至关重要.
- 这项规定使mES保持平衡状态,平衡自我更新和血统承诺.
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