Safety and Effectiveness of Brigatinib in Anaplastic Lymphoma Kinase (ALK) Positive Metastatic Non-Small Cell Lung Cancer (NSCLC) in Argentina: A Post-Marketing Surveillance Study.

BACKGROUND

Brigatinib, a next-generation anaplastic lymphoma kinase (ALK) inhibitor was licensed for the treatment of ALK-positive metastatic non-small cell lung cancer in 2016. However, real-world evidence on the safety and effectiveness of brigatinib in Latin America remains limited.

OBJECTIVE

The aim of this study was to assess the safety and effectiveness of brigatinib in the real world in Argentina.

METHODS

We conducted a non-interventional cohort study of adult patients (aged ≥  18 years) with a diagnosis of ALK-positive metastatic non-small cell lung cancer not previously treated (first line) or previously treated (second line) with an ALK inhibitor and who received at least one dose of brigatinib between November 2020 and March 2023. The primary outcome was the incidence of treatment-emergent adverse events. Secondary outcomes at the 24-week follow-up were the percentage of patients with an overall best objective response rate of complete or partial response; intracranial objective response rate; progression-free survival; and overall survival.

RESULTS

Of the 39 patients included in the study (n = 22 [first line]; n = 17 [second line]), 12 patients (30.7%) experienced treatment-emergent adverse events, with the most frequent being increased levels of transaminases (7.6%), increased level of blood creatine phosphokinase (5%) and hypokalaemia (5%). Most adverse events (85.7%) were mild to moderate. Effectiveness outcomes at 24 weeks in patients treated with brigatinib first line or second line, respectively, were as follows: overall objective response rate: 81.8% and 70.5%; intracranial objective response rate (in patients with brain metastases at baseline): 66.6% and 88.8%; progression-free survival: 93.8% and 82.4%; overall survival: 100% and 87.5%.

CONCLUSIONS

Brigatinib was demonstrated to be a safe and effective treatment option for ALK-positive metastatic non-small cell lung cancer in routine clinical practice in Argentina.

CLINICAL TRIAL REGISTRATION: NCT04887519.