The full management from first-line to third-line treatments in patients with Her-2-negative advanced gastric cancer.

Abstract

The aim of this study was to retrospectively evaluate the efficacy of full management from first-line to third-line treatments in patients with human epidermal growth factor receptor 2 (Her-2)-negative advanced gastric cancer (GC). The efficacy and survival time of a total of 126 patients who received the first-line treatment with oxaliplatin plus fluoropyrimidine (S-1 or capecitabine or fluorouracil), the second-line treatment with nab-paclitaxel, and the third-line treatment of immune checkpoint inhibitors between September 2019 and December 2021 were analyzed. A total of 42, 36, and 48 patients received CapeOX, FOLFOX, and SOX as a first-line treatment, respectively. All patients received nab-paclitaxel alone as a second-line treatment. In addition, 31, 56, and 39 patients received nivolumab, sintilimab, and tislelizumab as a third-line treatment, respectively. The median PFS1, median PFS2, and median PFS3 was 6.9 months [95% confidence interval (CI), 6.8-7.4], 5.5 months (95% CI, 5.3-5.7), and 3.5 months (95% CI, 3.4-3.7). The median PFS3 was 3.8 months (95% CI, 3.3-4.2) and 3.5 months (95% CI, 3.3-3.7) among the Epstein-Barr virus (EBV)-positive and EBV-negative, respectively (P = 0.09). In addition, the median PFS3 was 4.2 months (95% CI,3.6-4.7) and 3.5 months (95% CI, 3.3-3.6) in the patients with programmed death ligand 1 (PD-L1) combined positive score (CPS) ≥5 and CPS <5, respectively (P = 0.02). The median OS was 17.4 months (95% CI, 17.2-18.1). The multivariate analysis showed that the two parameters were associated with a significantly longer OS: number of metastatic sites <3 and PD-L1 CPS ≥5. The patients who received three lines of treatment had a long survival time, and the efficacy of immunotherapy was not affected by the EBV subtypes in advanced GC. The toxicity was managed, and the concept of full management needs to be confirmed in the future.