ERK酸化ESRRB,以调节小鼠胚胎干细胞的自我更新和分化
Xiaowei Duan1, Qingye Zhang1, Lulu Gao1
1State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Protein Sciences, Frontiers Science Center for Cell Responses, National Demonstration Center for Experimental Biology Education and College of Life Sciences, Nankai University, Tianjin 300071, China.
Stem cell reports
|February 7, 2025
概括
线原激活蛋白激酶 (MEK) 和细胞外信号调节激酶 (ERK) 信号传递在多能干细胞维护中起着双重作用. ESRRB的ERK酸化调节了干细胞的自我更新和分化.
科学领域:
- 干细胞生物学 干细胞生物学
- 分子信号通道的分子信号通道.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 线素激活蛋白激酶 (MEK) 抑制剂对于多能干细胞培养至关重要.
- 长时间的MEK抑制会损害小鼠胚胎干细胞 (ESC) 发育潜力,这表明MEK/ERK信号在多能性中起着复杂的作用.
研究的目的:
- 阐明MEK/ERK信号影响ESC多能性维护的确切机制.
- 确定参与调节干细胞命运的ERK的关键基质.
主要方法:
- 定量蛋白质组分析以识别ERK基质.
- 西部涂抹和特异性抗体,以验证ESRB酸化.
- 染色体免疫沉,然后进行定量PCR (ChIP-qPCR) 来评估基因结合.
主要成果:
- 确定了169个ERK基质,富含调节干细胞维护,胚胎发育和细胞周期的蛋白质.
- 证明ERK在Serine 42和43上酸化多能性因子ESRRB.
- 证明脱化ESRRB增强了多能性基因结合,促进了自我更新,而化ESRRB则促进了胚胎外内皮 (XEN) 的分化.
结论:
- ERK信号调节ESC的自我更新和通过多种基质的酸化,特别是ESRRB的差异化.
- 作为一个分子开关,ESRB酸化将ESC指向自我更新或XEN差异化.
- 这些发现为ERK信号传递在维持干细胞多能性和指导血统承诺方面的双重作用提供了关键的见解.
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