益格兰的O-GlcNAcylation促进了肝细胞癌的扩散和扩散
Yi Liang1, Liqiong Chen2, Zhuanglin Huang1
1Institute of Laboratory Medicine, Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, School of Medical Technology, The First Dongguan Affiliated Hospital, Dongguan Key Laboratory of Environmental Medicine, Guangdong Medical University, Dongguan, 523000, China.
Biochemical and biophysical research communications
|December 10, 2024
概括
在肝癌中,Progranulin (PGRN) 通过O-GlcNAcylation在Thr272进行修改. 这种修改增强了PGRN的稳定性,并通过PI3K/AKT/mTOR途径促进肝细胞癌 (HCC) 细胞的增殖.
科学领域:
- 在瘤学瘤学.
- 生物化学 生物化学
- 分子生物学分子生物学
背景情况:
- 在肝细胞癌 (HCC) 中,progranulin (PGRN) 过度表达,但在这种癌症中,其翻译后的修饰和调节机制尚不清楚.
- 了解PGRN调节对于开发针对HCC的向疗法至关重要.
研究的目的:
- 为了研究HCC中PGRN的翻译后修饰.
- 阐明O结合的N-乙糖胺 (O-GlcNAc) 修饰在PGRN调节中的作用及其对HCC进展的影响.
主要方法:
- 定量蛋白质组学 (LC-MS/MS) 和免疫沉用于识别PGRN修饰.
- 同免疫沉和共聚焦显微镜用于研究蛋白质相互作用.
- 西方涂抹和循环赫西米德 (CHX) 追逐试验来评估蛋白质的稳定性.
- 局部定向的突变发生和细胞增殖试验,以评估功能意义.
主要成果:
- 在HCC中,PGRN,O-GlcNAc转移酶 (OGT) 和O-GlcNAcylation水平较高.
- 在氨酸272 (Thr272) 中,PGRN被O-GlcNAc修饰.
- OGT与PGRN相互作用,并与O-GlcNAcylates PGRN.进行相互作用.
- 在Thr272的O-GlcNAcylation通过抑制无处化来增强PGRN稳定性.
- 突变Thr272会影响PGRN诱导的PI3K/AKT/mTOR信号传递和HCC细胞增殖.
结论:
- 在Thr272的O-GlcNAcylation是HCC中PGRN的一个关键的翻译后修饰.
- 这种修改稳定了PGRN,通过PI3K/AKT/mTOR通路促进了HCC细胞的增殖.
- 向PGRN O-GlcNAcylation可能代表HCC的新疗法策略.
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