向脂肪酸氧化增强了对HER2向治疗的反应
Ipshita Nandi1,2, Linjia Ji1, Harvey W Smith1
1Rosalind and Morris Goodman Cancer Institute, McGill University, Montreal, QC, Canada.
Nature communications
|August 3, 2024
概括
在ErbB2+乳腺癌中抑制Carnitine palmitoyl转移酶1a (Cpt1a) 会延缓瘤生长,但会增加对葡萄糖的依赖. 准Cpt1a和Nrf2,或使用基因饮食与抗ErbB2疗法,显示出有前途.
科学领域:
- 在瘤学瘤学.
- 代谢途径 代谢途径
- 癌症研究 癌症研究
背景情况:
- 代谢重编程在癌症发展中至关重要,涉及葡萄糖和脂肪酸代谢的变化.
- 卡尼丁棕甲基转移酶1a (Cpt1a) 对于长链脂肪酸氧化至关重要.
- ErbB2驱动的乳腺癌表现出改变的代谢依赖性.
研究的目的:
- 研究Cpt1a在ErbB2驱动的乳腺癌中的作用.
- 探索针对Cpt1a和HER2+乳腺癌中的代谢途径的治疗策略.
主要方法:
- 使用ErbB2+乳腺癌模型与Cpt1a切除.
- 评估瘤发病,生长,转移和细胞代谢 (依赖葡萄糖,氧化应激).
- 研究了核因素红色素2相关因子2 (Nrf2) 的作用,并采用了性饮食和抗ErbB2单克隆抗体 (mAbs).
主要成果:
- 切除Cpt1a延迟了瘤的进展,但增加了葡萄糖依赖和氧化应激,激活了Nrf2.
- 抑制Nrf2降低了Cpt1a缺乏细胞中的增殖和葡萄糖消耗.
- 组合疗法 (基因饮食或抗Cpt1a缺乏的anti-ErbB2 mAb) 显著抑制瘤生长,减少转移,并促进了抗瘤免疫微环境.
结论:
- 在ErbB2+乳腺癌的代谢和进展中,Cpt1a起着至关重要的作用.
- 通过抑制Cpt1a向脂肪酸氧化,结合抑制Nrf2或抗ErbB2疗法,为克服HER2+乳腺癌治疗耐药性提供了一个有希望的策略.
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