利用代谢适应来克服黑色素瘤细胞中达布拉费尼布治疗耐药性的作用
Silvia Eller1, Susanne Ebner1, Carmen Haselrieder1
1Daniel Swarovski Research Laboratory, Department of Visceral, Transplant and Thoracic Surgery, Medical University of Innsbruck, Austria.
Molecular oncology
|December 3, 2025
概括
黑色素瘤中BRAF抑制剂耐药性涉及代谢转变和p66Shc信号受损,导致线粒体损伤和活性氧物种 (ROS) 的增加. 耐药细胞对像PEITC这样的ROS诱导药物敏感.
科学领域:
- 在瘤学瘤学.
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 黑色素瘤治疗对BRAF抑制剂 (BRAFi) 的耐药性需要新的策略.
- 瘤进展涉及代谢变化,影响细胞氧化还原状态.
- 通常情况下,RAF激酶信号抑制了线粒体的活性氧物种 (ROS) 生产.
研究的目的:
- 在黑色素瘤中过渡到BRAFi耐药性的过程中调查信号传递和线粒体变化.
- 确定JNK1/2和p66Shc在BRAFi抵抗中的作用.
- 评估针对抗性黑色素瘤中改变的氧化还原状态的治疗策略.
主要方法:
- 使用了A375黑色素瘤细胞和达布拉芬尼 (BRAFi).
- 评估了信号通路 (ERK,JNK) 和p66Shc酸化.
- 采用高分辨率呼吸计 (HRR) 和传输电子显微镜 (TEM).
- 用乙烯异硫酸 (PEITC) 处理的细胞.
主要成果:
- BRAFi抵抗与ERK/JNK活性,p66Shc酸化和ROS升高相关.
- 耐药细胞显示线粒体损伤通过增加呼吸来补偿,导致高ROS.
- 耐药细胞拥有增强的抗氧化剂系统,尽管细胞死亡,但有助于净细胞生长.
- 特别是在抗达布拉费尼布的黑色素瘤细胞中,PEITC诱导了细胞死亡.
结论:
- 改变的氧化还原状态和受损的线粒体与BRAFi耐药性有关.
- 使用像PEITC这样的药物向ROS生产,对治疗耐药黑色素瘤有很大的希望.
- 了解这些机制可以指导开发新的治疗方法.
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