Journal
CLINICAL CANCER RESEARCH
Volume 24, Issue 15, Pages 3583-3592Publisher
AMER ASSOC CANCER RESEARCH
DOI: 10.1158/1078-0432.CCR-17-2507
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Funding
- Natural Science Foundation of China [81771924, 81501616, 61671449, 61231004, 81671854, 81501549]
- National Key R&D Program of China [2017YFA0205200, 2017YFC1308700, 2017YFC1308701, 2017YFC1309100]
- Science and Technology Service Network Initiative of the Chinese Academy of Sciences [KFJ-SW-STS-160]
- Instrument Developing Project of the Chinese Academy of Sciences [YZ201502]
- Beijing Municipal Science and Technology Commission [Z171100000117023, Z161100002616022]
- Youth Innovation Promotion Association CAS
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Purpose: We established a CT-derived approach to achieve accurate progression-free survival (PFS) prediction to EGFR tyrosine kinase inhibitors (TKI) therapy in multicenter, stage IV EGFR-mutated non-small cell lung cancer (NSCLC) patients. Experimental Design: A total of 1,032 CT-based phenotypic characteristics were extracted according to the intensity, shape, and texture of NSCLC pretherapy images. On the basis of these CT features extracted from 117 stage IV EGFR-mutant NSCLC patients, a CT-based phenotypic signature was proposed using a Cox regression model with LASSO penalty for the survival risk stratification of EGFR-TKI therapy. The signature was validated using two independent cohorts (101 and 96 patients, respectively). The benefit of EGFR-TKIs in stratified patients was then compared with another stage-IV EGFR-mutant NSCLC cohort only treated with standard chemotherapy (56 patients). Furthermore, an individualized prediction model incorporating the phenotypic signature and clinicopathologic risk characteristics was proposed for PFS prediction, and also validated by multi-center cohorts. Results: The signature consisted of 12 CT features demonstrated good accuracy for discriminating patients with rapid and slow progression to EGFR-TKI therapy in three cohorts (HR: 3.61, 3.77, and 3.67, respectively). Rapid progression patients received EGFR TKIs did not show significant difference with patients underwent chemotherapy for progression-free survival benefit (P = 0.682). Decision curve analysis revealed that the proposed model significantly improved the clinical benefit compared with the clinicopathologic-based characteristics model (P < 0.0001). Conclusions: The proposed CT-based predictive strategy can achieve individualized prediction of PFS probability to EGFR-TKI therapy in NSCLCs, which holds promise of improving the pretherapy personalized management of TKIs. (C) 2018 AACR.
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