First-line Chemotherapy Followed by Toripalimab Combined With Anlotinib for Maintenance in ES-SCLC

Small Cell Lung Carcinoma Clinical Trial

Official title: Efficacy and Safety of First-line Etoposide/Platinum-based Chemotherapy Followed by Toripalimab Combined With Anlotinib for Maintenance in Extensive Small Cell Lung Cancer: A Single-arm, Multicentral Phase II Study

Status Not yet recruiting

Clinical Trial Summary

Our aim in this study was to evaluate the efficacy and safety of etoposide combined with cisplatin or carboplatin (EC/EP) chemotherapy regimens followed by toripalimab combined with anlotinib for maintenance in extensive small cell lung cancer(ES-SCLC).

Clinical Trial Description

Lung cancer is the most leading malignant tumor, among which small cell lung cancer accounts for about 15%. Approximately 65% of new patients were diagnosed with ES-SCLC at the first visit with less than 6 months of median PFS (mPFS) and 8-13 months of median OS (mOS). Platinum combined with etoposide or irinotecan chemotherapy is the first-line standard chemotherapy treatment. Despite high objective response of initial treatment, it is evitable to develop chemotherapy resistance and the effects of follow-up line treatment is dissatisfying. Therefore, combination therapy may be promising and efficient.

Anlotinib, the brand new multi-target protein tyrosine kinase (PTK) blockers, could normalize distribution of blood vessels in the tumor, gather T cells and enhance effect of immune drugs via vascular endothelial growth factor receptor (VEGFR), platelet-derived growth factor receptor (PDGFR), fibroblast growth factor receptor (FGFR), type Ⅲ tyrosine kinase and others signal pathways, and then inhibit the growth, proliferation and differentiation of lung cancer cells. According to ALTER1202 study, anlotinib played a promising role in local tumor control and effectively prolonged PFS in third line or more for ES-SCLC patients. Meanwhile, immunocheckpoint inhibitors can improve tumor immune microenvironment, relieve VEGF-mediated immunosuppression, reduce Treg activity, promote tumor antigen presenting ability and better infiltrate T cell into the tumor to play an anti-tumor effect. Emerging studies have shown that immunocheckpoint inhibitors, such as Atezolizumab, Pembrolizumab and Nivolumab, can effectively improve ORR, DoR and survival in SCLC patients. In terms of molecular mechanisms, immunocheckpoint inhibitors and vascular targeting drugs complemented and the combination of two drugs has superior efficacy in non-small cell lung cancer (NSCLC), just as it shown in IMpower150 and other studies. However, the role of immunocheckpoint inhibitors in maintenance therapy in SCLC were disappointing in CheckMate451 and a study of pembrolizumab, although it obtained some victories in first line or more for SCLC.

In summary, the investigators proposed that first-line etoposide/platinum-based chemotherapy followed by toripalimab combined with anlotinib for maintenance may prolong chemo-resistance in extensive small cell lung cancer. ;

Related Conditions & MeSH terms

• Small Cell Lung Carcinoma

• NCT number: NCT04363255
• Study type: Interventional
• Source: Taizhou Hospital
• Contact: Dongqing Lv, MD
• Phone: 13867622009
• Email: lvdq@enzemed.com
• Status: Not yet recruiting
• Phase: Phase 2
• Start date: May 1, 2020
• Completion date: March 31, 2023