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Modifying Trial Design May Be Key to Full Sotorasib Approval

    Cancer Discovery
    |October 13, 2023
    PubMed

    Insights

    Sotorasib, a KRASG12C inhibitor, faces potential delays in full approval for non-small cell lung cancer due to trial design issues and progression-free survival results. Further research is needed to confirm its efficacy.

    Area of Science:

    • Oncology
    • Medical Oncology
    • Thoracic Cancers

    Background:

    • Sotorasib is a targeted therapy for KRASG12C-mutated non-small cell lung cancer (NSCLC).
    • The CodeBreaK 200 trial was a confirmatory Phase III study evaluating sotorasib in the second-line setting.
    • Previous studies suggested potential benefit, but confirmatory data is crucial for full approval.

    Purpose of the Study:

    • To assess the efficacy and safety of sotorasib compared to standard chemotherapy in patients with previously treated metastatic KRASG12C-mutated NSCLC.
    • To provide confirmatory data for the full regulatory approval of sotorasib.

    Main Methods:

    • CodeBreaK 200 was a randomized, open-label, Phase III trial.
    • Patients received either sotorasib or docetaxel.
    • Progression-free survival (PFS) was a primary endpoint.

    Main Results:

    • The trial encountered design challenges.
    • Progression-free survival data did not meet expectations for superiority.
    • These disappointing results may impact the drug's full approval.

    Conclusions:

    • Design flaws and suboptimal PFS data in CodeBreaK 200 raise concerns about sotorasib's efficacy as a second-line treatment for KRASG12C NSCLC.
    • Full approval for sotorasib may be contingent upon additional clinical investigations.
    • Further studies are warranted to clarify the role of sotorasib in this patient population.

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