Aim: Valuable and convenient prognostic predictors are essential for targeted therapy of nonsmall cell lung cancer (NSCLC). Patients with early-stage cancer and EGFR mutations who's neutrophils-to-lymphocytes rate (NLR) could be prognostic factor to evaluate efficacy. However, the prognostic role of NLR in patients receiving ALK inhibitors has not been established. Additionally, the relation between the efficacy of ALK inhibitors and derived NLR (dNLR), platelets-tolymphocytes rate (PLR), white blood cells (WBC) and hemoglobin (HGB) are still unknown.Methods: This is a retrospective single-center study and enrolled 113 staged IIIB-IV ALK-positive NSCLC patients who had received crizotinib treatment. Pretreatment NLR, dNLR, PLR, WBC, HGB were collected and calculated. Cox regression analysis were conducted to study the prognostic roles of NLR, dNLR, PLR, WBC, and HGB on progression-free survival (PFS) and overall survival (OS). Z-test was utilized to identify the difference among all predictive factors' receiver-operating characteristics (ROC) curves.
Results:The median PFS and OS were 10.1 and 23.4 months. Elevated NLR, dNLR, PLR and decreased HGB were associated with worse PFS (95% confidence interval [CI], 1.078-2.304, P = 0.018; 95% CI, 1.043-2.222, P = 0.028; 95% CI, 1.257-2.757, P = 0.002; 95% CI, 0.368-0.843, P = 0.005, respectively) and OS (95% CI, 1.698-5.721, P < 0.001; 95% CI, 1.273-3.984, P = 0.005; 95% CI, 2.174-6.347, P < 0.001; 95% CI, 0.246-0.710, P = 0.001, respectively). Z-test revealed there were no significant differences between single factors or combination of them to predict the efficacy.
Conclusions:Trend of NLR, dNLR, PLR and WBC could be used to identify patients progress status in ALK-positive NSCLC patients receiving crizotinib. Combination of all biomarkers is no superior to single biomarker.
K E Y W O R D Sanaplastic lymphoma kinase inhibitor, derived NLR, neutrophils-to-lymphocytes rate, non-small cell lung cancer, platelets-to-lymphocytes rate Rearrangement of anaplastic lymphoma kinase (ALK) gene is one of the main targets in NSCLC, the most common of which is EML4-ALK Asia-Pac J Clin Oncol. 2020;16:63-69.