LGR5/mTORC2轴调节细胞代谢可塑性,以维持肝细胞癌的瘤发生
Guishuai Lv1, Qianni Zong2, Liang Wang2
1International Co-operation Laboratory on Signal Transduction, Eastern Hepatobiliary Surgery Hospital, Naval Medical University (Second Military Medical University), Shanghai 200438, China; National Center for Liver Cancer, Naval Medical University (Second Military Medical University), Shanghai 201805, China; Shanghai Key Laboratory of Hepatobiliary Tumor Biology, Shanghai 200438, China; Key Laboratory of Signaling Regulation and Targeting Therapy of Liver Cancer, Ministry of Education, Shanghai 200438, China.
肝癌干细胞 (LCSCs) 使用LGR5来增强糖解和生存代谢压力. 甲胺向这种LGR5驱动的代谢脆弱性,为肝细胞癌 (HCC) 提供了潜在的治疗策略.
科学领域:
- 癌症生物学 癌症生物学
- 代谢重编程 代谢重编程
- 肝细胞癌 (HCC) 病原发生
背景情况:
- 癌症干细胞 (CSCs) 表现出代谢可塑性,以承受压力并促进生存.
- 脑神经细胞代谢重编程的机制和漏洞在很大程度上仍未被定义.
- 在结直肠癌中已知的CSC标志物LGR5在肝癌干细胞 (LCSCs) 中没有明确的作用.
研究的目的:
- 为了研究LGR5作为LCSCs的标志物.
- 阐明LGR5在调节LCSC代谢可塑性和生存中的作用.
- 探索针对LGR5-介导的HCC中的代谢脆弱性的治疗策略.
主要方法:
- 利用LGR5作为标记物来识别和研究肝细胞癌 (HCC) 中的LCSC.
- 研究LGR5表达对细胞代谢可塑性的影响,特别是糖解能力.
- 研究了涉及LGR5/mTORC2/RAC1/AKT/FOXO3a轴在调节有氧糖解中的分子机制.
- 评估了p-AMPK激动因子metformin在抑制HCC细胞表型中的疗效,在体外和体内.
主要成果:
- LGR5被验证为LCSCs的标记物,高LGR5表达与HCC细胞代谢可塑性增加相关.
- 在葡萄糖饥饿条件下,LGR5增强了促进癌症细胞存活的糖分分解能力.
- LGR5通过RAC1/AKT/FOXO3a轴激活mTORC2信号通路,在代谢压力期间诱导有氧糖解.
- 在高LGR5-表达的HCC细胞中观察到降低的p-AMPK水平,甲胺治疗有效抑制异常HCC表型.
结论:
- LGR5是LCSCs中糖解的关键调节者,有助于它们在代谢压力下生存.
- 通过LGR5介导的有氧糖解激活在HCC中具有特定的代谢脆弱性.
- 甲胺通过准LCSCs的LGR5-驱动的代谢脆弱性来证明其治疗潜力.
- 在肝癌中,LGR5代表了克服代谢抵抗的有前途的治疗标.
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