GEMSTONE-301: a phase III clinical trial of CS1001 as consolidation therapy in patients with locally advanced/unresectable (stage III) non-small cell lung cancer (NSCLC) who did not have disease progression after prior concurrent/sequential chemoradiotherapy

Translational Lung Cancer Research
Qing ZhouYi-Long Wu

Abstract

In China, platinum-based doublet chemotherapy is the standard treatment for patients who have unresectable stage III non-small cell lung cancer (NSCLC), administered with radiotherapy on either a concurrent or sequential basis. However, NSCLC patients who undergo this treatment can expect poor median progression-free survival (PFS) of around 8-10 months and a dismal 5-year overall survival (OS) rate of about 15%. In the recent PACIFIC trial, durvalumab was demonstrated to hold significant clinical benefit for patients with locally advanced/unresectable NSCLC who experienced no disease progression after definitive concurrent chemoradiotherapy (cCRT). CS1001 is the first full-length, fully human immunoglobin G4 (IgG4) monoclonal antibody (mAb) that targets programmed death ligand-1 (PD-L1) created through the OMT transgenic rat platform. The phase Ia/Ib study indicated CS1001 was well tolerated and exhibited anti-tumor potential with a range of tumors. GEMSTONE-301 is a phase III randomized, double-blind, study to explore the efficacy and safety of CS1001 compared with a placebo as consolidation therapy for stage III unresectable NSCLC patients. In this trial, eligible patients will be randomized to receive CS1001 1,200 mg or pla...Continue Reading

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