PD-L1调节c-MET酸化,并有助于EGFR突变NSCLC中MET依赖性对奥西默提尼布的抵抗
Chia-Chi Hsu1,2, Derek De-Rui Huang1,3,4, Wei-Hsun Hsu1,2
1Department of Oncology, National Taiwan University Hospital, Taipei, Taiwan.
Journal of biomedical science
|October 9, 2025
概括
在EGFR突变非小细胞肺癌 (NSCLC) 中,编程死亡配体1 (PD-L1) 升高调节c-MET酸化. 这种PD-L1活性促进MET放大,导致对 osimertinib 治疗的抗性.
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:
- 编程死亡配体1 (PD-L1) 是非小细胞肺癌 (NSCLC) 免疫治疗的预测生物标志物.
- 在表皮生长因子受体 (EGFR) 突变NSCLC中PD-L1的作用尚不清楚.
- 研究PD-L1对EGFR突变NSCLC中信号通路的影响至关重要.
研究的目的:
- 阐明PD-L1在EGFR突变NSCLC信号传递中的调节作用.
- 为了确定PD-L1对c-MET酸化和MET放大的影响.
- 评估PD-L1对奥西默提尼布耐药性的贡献.
主要方法:
- 试验室研究涉及操纵EGFR突变细胞系中的PD-L1表达.
- 分析包括人体受体氨酸激酶 (RTK) 阵列,西部涂抹和蛋白氨酸酸酶 (PTP) 测试.
- 在体内实验中使用异种移植小鼠来评估PD-L1对奥西默提尼布耐药性的影响.
主要成果:
- 过度表达PD-L1增加了c-MET酸化,而PD-L1淘汰/淘汰降低了它.
- PD-L1抑制了PTP活性,并减少了所选PTP的mRNA表达,从而调节了c-MET酸化.
- MET放大发生在PD-L1过度表达的异体移植中,但在 osimertinib 耐药性方面没有发生在 PD-L1 淘汰赛或父细胞中.
结论:
- 在EGFR突变NSCLC中,PD-L1调节c-MET酸化.
- PD-L1促进MET放大,这种机制有助于奥西默提尼布耐药性.
- 向PD-L1可能会克服EGFR突变NSCLC治疗ozimertinib的耐药性.
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