对于EGF介导的酸-3,4,5-三酸盐生成和Akt信号传递,需要LCLAT1/LYCAT转移酶
Victoria Chan1,2, Cristina Camardi1,2, Kai Zhang2
1Molecular Science Graduate Program, Toronto Metropolitan University, Toronto, Ontario M5B2K3, Canada.
Molecular biology of the cell
|July 18, 2024
概括
LCLAT1酶对于受体氨酸激酶信号传递至关重要,包括EGF受体通路. 沉默LCLAT1降低了酸丁酸-3,4,5-三酸盐水平,并损害了Akt的激活,突出其在细胞生长和存活中的作用.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 分子生物学分子生物学
背景情况:
- 像EGFR这样的受体氨酸激酶 (RTK) 激活氨基酸3激酶,产生氨基酸-3,4,5-三酸盐 (PtdIns(3,4,5) P3).
- PtdIns ((3,4,5) P3对于细胞存活,增殖和动蛋白重塑至关重要,部分通过Akt激酶激活.
- 失调的PtdIns(3,4,5) P3-Akt信号与瘤进展有关.
研究的目的:
- 调查LCLAT1乙基转移酶在RTK和PtdIns中的作用.
- 为了确定LCLAT1是否影响EGF受体 (EGFR) 信号通路.
主要方法:
- 在MDA-MB-231和ARPE-19细胞系中抑制LCLAT1.
- 在EGF刺激后测量PtdIns(3,4,5) P3水平.
- 评估LCLAT1沉默细胞中的Akt激活和下游信号.
主要成果:
- 作为对EGF的反应,LCLAT1沉默显著降低了PtdIns(3,4,5) P3水平.
- 在缺乏LCLAT1的细胞中,EGF和胰岛素驱动的Akt激活受损.
- 由Akt调节的下游信号通路也受到LCLAT1耗尽的影响.
结论:
- 对于有效的RTK信号传递,特别是EGFR通路,LCLAT1是必要的.
- 这项研究提供了第一个证据,将LCLAT1转移酶活性与RTK介导的PtdIns(3,4,5) P3生成和Akt激活联系起来.
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