The Study is a Phase 3, randomized, three-arm, double-blind, placebo-controlled, multi-regional clinical research study to evaluate the safety and efficacy use of toripalimab alone or in combination with tifcemalimab as consolidation therapy in patients with limited-stage small cell lung cancer without disease progression following chemoradiotherapy.
Tifcemalimab is a monoclonal antibody against B and T lymphocyte attenuator (BTLA). Toripalimab is a monoclonal antibody against programmed death protein-1 (PD-1). Neither drug is approved for treatment of This combination regimen is investigational in limited stage-small cell lung cancer in any country.
Male or female with age ≥ 18 years old at the time of informed consent.
Histologically or cytologically confirmed LS-SCLC using the Veteran's Administration Lung Study Arm (VALSG) staging criteria (Appendix 3). Patients with TNM Stage I or II disease per AJCC 8th edition must be medically inoperable (as determined by the Investigator) or the patient must refuse surgery.
Received CRT defined as: (1) 4 cycles of chemotherapy consisting of carboplatin or cisplatin and intravenously administered etoposide; (2) a total radiation dose of 60-66 Gy for the standard once daily (QD) radiotherapy regimen or 45 Gy for the hyperfractionated twice daily (BID) radiotherapy regimen; (3) Patients must begin investigational interventions within 42 days of the last dose of chemotherapy.
Patients must have achieved a complete response (CR), partial response (PR), or stable disease (SD) after receiving curative platinum-based CRT and must not have developed progressive disease (PD) prior to study entry.
Mixed SCLC and non-small cell lung cancer (NSCLC).
Received sequential chemoradiotherapy for LS-SCLC.
Failure to recover from toxicity of prior anticancer therapy to Common Terminology Criteria for Adverse Events (CTCAE) Grade ≤ 1 (except alopecia) or levels specified in the inclusion/exclusion criteria, whichever is more severe.
Patients with active autoimmune disease, history of autoimmune disease.
Parallel
Tifcemalimab injection
Drug200mg once every 3weeks
toripalimab injection
Drug240mg once every 3 weeks
Placebo for Tifcemalimab
Drugevery 3weeks
Placebo for toripalimab
Drugevery 3weeks
Overall survival (OS)
To compare and evaluate the efficacy of tifcemalimab and toripalimab (Arm A) versus placebo (Arm C) as consolidation therapy after chemoradiotherapy (CRT) for patients with LS-SCLC as measured by OS
OS
To compare and evaluate the efficacy of toripalimab (Arm B) versus placebo (Arm C) as consolidation therapy after CRT for patients with LS-SCLC as measured by OS"
Progression-free survival (PFS)
To compare and evaluate the efficacy of tifcemalimab and toripalimab (Arm A) versus placebo (Arm C) as consolidation therapy after CRT for patients with LS-SCLC as measured by Blinded Independent Review Committee (BIRC)-assessed PFS.
Progression-free survival (PFS)
To compare and evaluate the efficacy of toripalimab (Arm B) versus placebo (Arm C) as consolidation therapy after CRT for patients with LS-SCLC as measured by OS and BIRC-assessed PFS.
PFS
To compare and evaluate the efficacy of tifcemalimab and toripalimab (Arm A) versus placebo (Arm C) as consolidation therapy after CRT for patients with LS-SCLC as measured by Investigator-assessed PFS
1-year OS rate
To compare and evaluate the efficacy of tifcemalimab and toripalimab (Arm A) versus placebo (Arm C) as consolidation therapy after CRT for patients with LS-SCLC as measured by 1-year OS rate
2-year OS rate
To compare and evaluate the efficacy of tifcemalimab and toripalimab (Arm A) versus placebo (Arm C) as consolidation therapy after CRT for patients with LS-SCLC as measured by 2-year OS rate
objective response rate (ORR)
To compare and evaluate the efficacy of tifcemalimab and toripalimab (Arm A) versus placebo (Arm C) as consolidation therapy after CRT for patients with LS-SCLC as measured by ORR
Click on the lead sponsor to view all of their trials.
