Lung Cancer Clinical Trials with a Seamless Phase II/III Design: Systematic Review
Seamless phase II/III designs represent an efficient and suitable approach in lung cancer clinical research, enabling reduced sample sizes, accelerated development, and flexible adaptation to interim data.
Current lung cancer clinical research focuses on biomarkers and personalized treatment strategies. Adaptive clinical trial designs have gained significant ground due to their increased flexibility, compared to the conventional model of drug development from phase I to phase IV trials. One such adaptive approach is the seamless phase II/III design, which has been used to reduce the total sample size and drug development time. In this context, an algorithmic systematic search was conducted in MEDLINE (PUBMED), SCOPUS, EMBASE and Cochrane Central Register of Controlled Trials until 31 June 2022 in order to identify lung cancer trials of systematic treatments that have employed the seamless phase II/III methodology and to describe their characteristics. The search strategy yielded a total of 1420 records that were screened through their title and abstract; 28 eligible trials were included in the systematic review. Based on the study endpoints, the most common subtype included phase II/III trials with inefficacy/futility analyses (61%; 17/28), followed by dose escalation phase II/III trials (18%; 5/28), one multi‑arm multi‑stage trial and 5 trials with other design (18%). Most eligible trials were open‑label (71%; 20/27), included patients with non‑small cell lung cancer (82%; 23/28), evaluated targeted therapies and/or immunotherapies (82%; 23/28) and recruited patients with advanced disease (89.3%; 25/28). In conclusion, the seamless phase II/III design is a feasible and suitable approach in lung cancer research, with distinct design subcategories according to study endpoints.
Adaptive seamless Phase II/III designs allow lung cancer trials to combine dose‑finding and confirmatory stages, potentially shrinking sample sizes, speeding up drug development, and enhancing flexibility, thereby addressing the urgent unmet needs for novel therapeutic options and prognostic biomarkers in lung cancer.
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