真实世界中MET 14外显子跳跃突变晚期非小细胞肺癌的疗效分析

    An Efficacy Analysis of Advanced Non-Small Cell Lung Cancer With MET Exon 14 Skipping in the Real World

    • 摘要: 目的 MET 14外显子跳跃突变是肺癌的少见驱动基因,靶向治疗在临床研究中已观察到良好的抗肿瘤活性,然而目前多数报道为临床研究数据,真实世界中患者分析较少。本研究旨在探索真实世界中此类患者的临床特征和疗效。 方法 回顾性收集不符合临床试验入组标准或不愿意参加临床试验的MET 14外显子跳跃突变局部晚期和转移性非小细胞肺癌(non-small cell lung cancer,NSCLC)患者,总结临床病理和分子特征,同时进行客观疗效与生存分析。 结果 本中心自2017年2月至2021年2月共15例患者符合纳入标准,常见的伴随基因为TP53(53.8%)、MYC(23.1%)、ATM(23.1%),并多以共突变的形式存在。大部分患者(70.0%,7/10)程序性死亡配体1(programmed death ligand 1,PD-L1)呈高表达(≥50%)水平。13例患者接受伯瑞替尼或克唑替尼治疗,12例可进行疗效评价的患者中,中位无进展生存期(median progression free survival,mPFS)为6.1个月,中位总生存期(median overall survival,mOS)为17.3个月,客观缓解率(objective response rate,ORR)为33.3%。体力活动状态(performance status,PS)评分=1分的患者疗效明显优于PS评分>1分的患者(mPFS: 7.3个月vs. 0.4个月,P=0.002;mOS: 21.2个月vs. 9.3个月,P=0.000)。 结论 本研究中MET 14外显子跳跃突变NSCLC靶向治疗的客观疗效与生存期差于已发表的临床数据,考虑可能与靶向治疗用药时PS评分较差或原发耐药相关。

       

      Abstract: Objective MET exon 14 skipping was a rare driver gene in lung cancer. Efficacy of targeted therapy had been observed in clinical trials. However, few reports were about analyses of patients in the real world. This study was designed to explore the clinical characteristics and outcomes of such patients in the real world. Methods MET exon 14 skipped locally advanced or metastatic non-small cell lung cancer (NSCLC) patients who did not meet the criteria or reject to participate in clinical trials were retrospectively collected, clinicopathologic and molecular characteristics were summarized, objective response and survival analysis were performed. Results Fifteen patients were included in this study. The most common concurrent altered genes were TP53 (53.8%), MYC (23.1%) and ATM (23.1%). High programmed death ligand 1 (PD-L1) expression (≥ 50%) was seen in most patients (70.0%, 7/10). Thirteen patients received bozitinib or crizotinib treatment. Of the 12 evaluable patients, the median progression free survival (mPFS) was 6.1 months while the median overall survival (mOS) was 17.3 months, and the objective response rate (ORR) was 33.3%. Patients with a performance status (PS) score of 1 had a significantly better outcome than those with a poor PS score (>1) (mPFS: 7.3 m vs. 0.4 m, P=0.002; mOS: 21.2 m vs. 9.3 m, P=0.000). Conclusions The efficacy of targeted therapy for NSCLC with MET exon 14 skipping in this study were worse than published data of clinical trials, which may be related to poor performance status or primary drug resistance.

       

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