Article
作者: Liu, Chengwu ; Yuan, Yong ; Lin, Feng ; Wang, Wenping ; Xu, Yuyang ; Li, Qingyun ; Pu, Qiang ; Li, Chuan ; Liu, Zheng ; Wang, Yun ; Liu, Lunxu ; Zhang, Xiaolong ; Xia, Liang ; Lin, Yidan ; Mei, Jiandong ; Li, Kaidi ; Du, Bo ; Deng, Senyi ; Che, Guowei ; Ma, Lin ; Gan, Fanyi ; Feng, Gang ; Kang, Ran ; Yang, Ying ; Guo, Chenglin ; Chen, Longqi ; Xie, Dan ; Liao, Hu ; Wu, Zhu ; Kou, Yingli ; Deng, Yulan ; Shen, Shensi ; Hu, Yang ; Li, Lu ; Chen, Yaohui ; Chen, Weizhi ; Zhu, Yunke
Background:Circulating tumor DNA (ctDNA) is valuable for detecting minimal residual disease (MRD). However, studies involving long-term blood sampling are required to comprehensively interpret the clinical use of ctDNA analyses.
Methods:We conducted a prospective multicenter cohort study (LUNGCA) for dynamic ctDNA monitoring in lung cancer patients receiving curative-intent surgery. ctDNA analysis was conducted on preoperative plasma samples, at postoperative 3 days and 1 month, and then every 3-6 months for up to 3 years.
Results:In total, 233 non-small cell lung cancer (NSCLC) patients and 2336 longitudinal plasma samples were included; the median follow-up was 51.4 months. Post-comprehensive treatment (after radical surgery + necessary adjuvant therapy) MRD status was better at predicting relapse than postoperative MRD status (positive predictive value: 100% vs 90.0%; negative predictive value: 90.3% vs 90.1%). Patients with positive pre-adjuvant ctDNA and targetable mutations in tumor tissues had improved recurrence-free survival (RFS) with corresponding adjuvant tyrosine kinase inhibitor (TKI) treatment (hazard ratio [HR] = 0.01, P = .005), but adjuvant chemotherapy failed to improve RFS (HR = 0.6, P = .491). Of patients receiving adjuvant therapies, patients with a negative- or positive-negative ctDNA change pattern had favorable and similar RFS (P = .419), whereas patients with a positive- or negative-positive pattern had worse RFS (P < .001). TKI therapy was more effective than chemotherapy in clearing ctDNA. Post-relapse ctDNA negativity was associated with favorable OS (HR = 0.4; P = .029).
Conclusions:Comprehensive interpretation of dynamic ctDNA monitoring data can inform precise whole-course postsurgical management of NSCLC patients.