The Food and Drug Administration has approved brigatinib (Alunbrig) to treat adults with ALK-positive metastatic non–small cell lung cancer (NSCLC) as detected by an FDA-approved test.
The FDA also approved the Vysis ALK Break Apart FISH Probe Kit as a companion diagnostic for brigatinib.
Brigatinib and the companion diagnostic were both evaluated in the ALTA 1L trial (NCT02737501). The trial enrolled adults with advanced ALK-positive NSCLC who had not previously received an ALK-targeted therapy. Patients had to have an ALK rearrangement based on a local standard of care test.
Clinical samples from trial participants were retrospectively tested with the Vysis ALK Break Apart FISH Probe Kit. Of the 275 patients enrolled in the trial, 239 were ALK positive according to the test. Results were negative for 20 patients and unavailable for 16 patients.
Patients were randomized to receive brigatinib at 180 mg once daily with a 7-day lead-in at 90 mg once daily (n = 137) or crizotinib at 250 mg twice daily (n = 138).
The estimated median progression-free survival was 24 months in the brigatinib arm and 11 months in the crizotinib arm (hazard ratio, 0.49; P < .0001). The overall response rate was 74% in the brigatinib arm and 62% in the crizotinib arm.
The most common adverse events in the brigatinib arm, occurring in at least 20% of patients, were diarrhea, fatigue, nausea, rash, cough, myalgia, headache, hypertension, vomiting, abdominal pain, pruritus, back pain, and dyspnea.
Serious adverse events occurred in 33% of patients in the brigatinib arm, and fatal adverse events included in 2.9%. The fatal events were pneumonia (1.5%), cerebrovascular accident (0.7%), and multiple organ dysfunction syndrome (0.7%).
For more details on the ALTA 1L trial, see the full prescribing information for brigatinib.
The approval of brigatinib was granted to ARIAD Pharmaceuticals. The approval of the Vysis ALK Break Apart FISH Probe Kit was granted to Abbott Molecular.