葡萄糖诱导和ChREBP:MLX介导的脂原性计划促进了肝细胞癌的发展
Aijuan Yu1, Pengcheng Yu1,2, Yuwen Zhu1
1Institute of Pediatrics, Children's Hospital of Fudan University, and the Shanghai Key Laboratory of Medical Epigenetics, The International Co-laboratory of Medical Epigenetics and Metabolism, the State Key Laboratory of Genetic Engineering, Institutes of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China.
Oncogene
|September 8, 2023
概括
这项研究揭示了ChREBP:MLX转录因子对于葡萄糖诱导的脂质生成至关重要,驱动肝细胞癌 (HCC) 的发展. 抑制MLX阻断了HCC的进展,突出显示它是肝癌的潜在治疗标.
科学领域:
- 代谢调节 代谢调节 代谢调节
- 癌症生物学 癌症生物学
- 瘤发生的分子机制
背景情况:
- 不调节的葡萄糖和脂质代谢是癌症的标志,特别是肝细胞癌 (HCC).
- 葡萄糖诱导的脂肪生成程序的作用,由碳水化合物反应元素 (ChoRE) 结合蛋白 (ChREBP) 和Max-like蛋白X (MLX) 介导,在HCC的发展中仍然不清楚.
研究的目的:
- 研究ChREBP:MLX转录因子复合体在肝细胞癌 (HCC) 发展中的作用.
- 确定针对MLX是否可以成为HCC的治疗策略.
主要方法:
- 在HCC标本中分析MLX表达.
- 在HCC细胞系中抑制MLX表达.
- 在小鼠中的Mlx的肝脏特异性淘汰.
- 使用二甲基尼胺 (DEN) 和动注射瘤基因 (AKT/RAS或CTNNB1/RAS) 来诱导小鼠的HCC.
- 向Mlx缺乏的小鼠提供高脂肪饮食.
- 在小鼠中使用腺相关病毒对主导阴性MLX (dnMLX) 的肝脏特异表达.
主要成果:
- 在HCC组织中,MLX表达升高,其下调抑制HCC细胞增殖.
- 肝脏特异性的Mlx淘汰会显著降低小鼠的脂原基因表达和循环脂质水平.
- 在多种HCC模型中,Mlx缺乏强有力的阻断瘤的发展.
- 高脂肪饮食部分恢复了Mlx缺乏肝脏的瘤发生,强调了脂质合成的重要性.
- dnMLX的肝脏特异表达有效地防止了小鼠的HCC发展.
结论:
- 通过ChREBP:MLX介导的葡萄糖诱导的脂质生成程序对于HCC的发展至关重要.
- MLX是HCC的关键驱动因素,是肝癌治疗的有前途的治疗标.
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