转基因控制饮食的重塑及其对瘤产生的影响
Haojun Yang1,2, Vincenzo Andrea Zingaro1,2, James Lincoff3,4
1Helen Diller Family Comprehensive Cancer Center, UCSF, San Francisco, CA, USA.
Nature
|August 14, 2024
概括
禁食通过AMPK-MNK-eIF4E途径触发选择性翻译控制,增强生成. 这种与脂肪酸相关的途径是癌症治疗的潜在目标.
科学领域:
- 代谢信号
- 分子生物学
- 癌症研究
背景情况:
- 禁食对健康有好处, 但其潜在的分子机制, 特别是它如何影响蛋白质转化和代谢程序, 尚未完全理解.
- 虽然全球蛋白转换在禁食期间减少,但特定的细胞适应发生,特别是在肝细胞中.
研究的目的:
- 阐明禁食调节蛋白质转换并建立代谢程序的分子机制.
- 确定参与禁食诱导的生成和脂质代谢的关键信号通路.
- 探索针对这些癌症途径的治疗潜力.
主要方法:
- 在禁食期间分析肝细胞转化体.
- 研究化真核转化启动因子4E (P-eIF4E) 在控制基因转化中的作用.
- 使用P-eIF4E通路的遗传和药理抑制.
- 研究脂肪酸对AMP激活蛋白激酶 (AMPK) 和MAP激酶相互作用蛋白激酶 (MNK) 信号的作用.
- 评估P-eIF4E抑制对胰腺瘤生长的影响
主要成果:
- 禁食可以选择性地重塑肝细胞中的转化体,降低全球转化,但提高特定蛋白质的调节.
- 细胞转化启动因子4E (P-eIF4E) 的酸化是由禁食诱导的,并控制脂质代谢和生成的基因.
- 脂肪酸激活AMPK-MNK-eIF4E信号轴,将脂质代谢与翻译控制和生成联系起来.
- 抑制P-eIF4E会影响生成,并抑制胰腺瘤的生长.
结论:
- 一种由脂肪酸诱导的新信号通路 (AMPK-MNK-eIF4E) 将脂质代谢与选择性翻译控制联系起来,推动生成.
- 这一途径代表了利用体作为能量的癌症的潜在治疗点.
- 用eFT508等抑制剂向P-eIF4E显示出癌症治疗的前景,特别是与性饮食结合使用.
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