由胺醇-1 (BUB1) 不受抑制的芽通过减少EGFR内部化来调节EGFR信号传递
Shyam Nyati1,2, Grant Young1, Corey Speers1,3
1Department of Radiation Oncology, University of Michigan, Ann Arbor, MI 48109, USA.
Aging
|July 3, 2023
概括
布布1通过控制EGFR的激活,内化和降解来调节表皮生长因子受体 (EGFR) 信号传递. 抑制BUB1激酶活性会影响EGFR信号通路,而不会影响其他受体氨酸激酶.
科学领域:
- 细胞生物学 细胞生物学
- 分子信号传输的方法
- 癌症研究 癌症研究
背景情况:
- 皮表皮生长因子受体 (EGFR) 信号传递对细胞生长至关重要,并且在癌症中经常受到失调.
- EGFR激活涉及连接体结合,受体二元化和内部化.
- 在EGFR信号调节中的BUB1 (由胺醇1不抑制的布丁) 的作用仍然不清楚.
研究的目的:
- 研究BUB1对EGFR信号传递的影响,特别是其激活和内部化.
- 为了确定BUB1激酶活性是否影响EGFR下游信号通路.
- 评估BUB1调制对EGFR降解和内细胞分裂的影响.
主要方法:
- 使用siRNA和用2OH-BNPP1.1进行生化抑制的BUB1的基因组移除.
- 使用EGF连接体和蛋白质与DSS交叉连接,启动EGFR信号传输.
- 西方免疫注射测量EGFR信号标记物 (-EGFR,pAKT,pERK).
- 光显微镜用于评估EGFR内部化 (pEGFR与EEA1的同位化).
主要成果:
- 由于BUB1的减少,EGFR总水平和-EGFR二次数增加.
- 抑制BUB1降低了EGF介导的EGFR信号传递,包括pEGFR,pAKT和pERK.
- 在不影响HER2或c-MET的情况下,BUB1抑制减少了EGFR降解和损害了EGFR内细胞形成.
- 特别影响BUB1抑制不对称的-EGFR二元体,而不是对称的EGFR总二元体.
结论:
- BUB1蛋白及其激酶活性在调节EGFR激活,内细胞分裂和降解方面发挥着重要作用.
- BUB1影响EGFR下游的信号通路.
- 在EGFR信号传递中BUB1的调节作用是特定的,不扩展到HER2或c-MET.
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