New Clinical Applications-sintilimab Combined with Albumin-bound Paclitaxel/cisplatin in Treatment of Relapsed or Refractory ES-SCLC

Abstract Introduction: This study is aimed to evaluate the efficacy and safety of sintilimab combined with albumin-bound paclitaxel/ cisplatin as a second-line treatment in these patients with relapsed or refractory extensive-stage small cell lung cancer (ES-SCLC). Methods and Materials: ES-SCLC patients received a second-line regimen of sintilimab combined with albumin-bound paclitaxel/cisplatin. Albumin-bound paclitaxel/cisplatin can be used for up to 6 cycles. Sintilimab use was not stopped until the disease progressed or untolerable side effects occurred. After 2 cycles of chemotherapy or when the patient's condition progressed significantly, computed tomography was rechecked to observe the clinical curative effect and adverse reactions. Results: Totally 38 patients with recurrent SCLC were included for efficacy evaluation. The objective response rate and disease control rate were 26.3% and 84.2% respectively. The median PFS and OS were 6.5 months (95% CI: 3.8-7.8) and 10.8 months (95% CI: 8.5-16.2), respectively. The main adverse reactions are bone marrow suppression, alopecia, peripheral neurotoxicity, muscle and joint pain, gastrointestinal reactions, and fatigue. The severe adverse reactions (grade 3-4) are mainly leukopenia (21.1%), neutropenia (21.1%) and decreased hemoglobin (7.9%). No significant correlation was found between PD-L1 expression and efficacy.Conclusion: Sintilimab combined with albumin-bound paclitaxel/cisplatin has a positive effect on the treatment of ES-SCLC, and the adverse reactions are tolerable.