通过激活ErbB3/STAT3信号通路,CD44s和CD44v8-10异型通过激活ErbB3/STAT3信号通路,赋予了对奥西默蒂尼布的获得性耐药性
Yi-Nan Liu1, Meng-Feng Tsai2, Shang-Gin Wu3
1Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan.
Life sciences
|December 13, 2023
概括
CD44拼接变体通过合作选择ErbB3信号通路,在肺癌中驱动获得的对 osimertinib 的耐药性. 针对CD44/ErbB3信号提供了一个潜在的策略来克服这种阻力.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 表皮生长因子受体 (EGFR) 突变肺癌最初对奥西默提尼布有反应.
- 获得了对奥西默蒂尼布的耐药性,无论是依赖EGFR还是独立,都构成了重大的临床挑战.
- CD44拼接变异在肺癌中很普遍,但它们在异星丁尼布耐药性中的作用尚不清楚.
研究的目的:
- 为了研究CD44拼接变异对肺癌中获得的奥西默提尼布耐药性的参与.
- 阐明 CD44 变异对 osimertinib 耐药性的分子机制.
- 探索CD44/ErbB3信号作为潜在的治疗点.
主要方法:
- 实时PCR测量CD44及其拼接变体 (CD44s,CD44v).
- 基因淘汰和恢复实验,以评估CD44变异对奥西默提尼布敏感性的影响.
- 使用受体-铁氨酸激酶酸化阵列,共免疫沉和西部涂抹的信号通路的分析.
主要成果:
- 肺腺癌的CD44总表达增加,与获得的 osimertinib 耐药性.
- 耐奥西默提尼布的细胞表现出高水平的CD44s或CD44v变体.
- CD44 knockdown 对 osimertinib 的耐药细胞产生了敏感性,而 CD44s 或 CD44v8-10 的恢复则诱导了耐药性.
- 发现CD44与ErbB3相互作用并对ErbB3进行交换,从而激活ErbB3/STAT3通路.
结论:
- CD44作为ErbB3的共同受体,激活ErbB3信号轴,并调解获得的奥西默提尼布耐药性.
- CD44/ErbB3信号通路是肺癌中 osimertinib 耐药性的关键机制.
- 向CD44/ErbB3信号传递是一个有前途的治疗策略,以克服奥西默提尼布耐药性.
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