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J. Haney



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    OA08 - Targeted Therapies in Brain Metastases (ID 381)

    • Event: WCLC 2016
    • Type: Oral Session
    • Track: Advanced NSCLC
    • Presentations: 1
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      OA08.06 - Brigatinib Activity in Patients with ALK+ NSCLC and Intracranial CNS Metastases in Two Clinical Trials (ID 4374)

      16:55 - 17:05  |  Author(s): J. Haney

      • Abstract
      • Presentation
      • Slides

      Background:
      Patients treated with crizotinib often experience disease progression in the brain. Brigatinib, an investigational next-generation ALK inhibitor, is being evaluated in an ongoing phase 1/2 trial (Ph1/2) and an ongoing pivotal phase 2 trial (ALTA).

      Methods:
      In Ph1/2, patients with advanced malignancies, including ALK+ NSCLC, received 30–300 mg brigatinib per day. In ALTA, patients with crizotinib-resistant advanced ALK+ NSCLC received 90 mg qd (arm A) or 180 mg qd with a 7-day lead-in at 90 mg (arm B). Efficacy (in both trials) and safety (in ALTA) are reported for ALK+ NSCLC patients with brain metastases at baseline.

      Results:
      In Ph1/2 and ALTA, 50/79 (63%; IRC-assessed) and 154/222 (69%; investigator-assessed) of ALK+ NSCLC patients, respectively, had baseline brain metastases. In Ph1/2 (n=50), median age was 53 years, 76% received prior chemotherapy, and 8% were crizotinib-naive. In ALTA (n=154), median age was 52 years; 75% received prior chemotherapy. As of November 16, 2015, 25/50 (50%) patients were receiving brigatinib in Ph1/2; as of February 29, 2016, 101/154 (66%) patients were receiving brigatinib in ALTA. For patients with measurable lesions, confirmed iORR was 53% in Ph1/2 and 42%/67% in ALTA A/B (Table). Among patients with only nonmeasurable lesions (Ph1/2, n=31; ALTA A/B, n=54/n=55), 35% had confirmed complete resolution of lesions in Ph1/2; 7%/18% had confirmed complete resolution in ALTA A/B. For all evaluable patients with baseline brain metastases, median intracranial PFS was 15.6 months in Ph1/2 (n=46) and 15.6/12.8 months in ALTA A/B (n=80/n=73). Most common treatment-emergent adverse events in ALTA in patients with baseline brain metastases (n=151 treated): nausea (A/B, 32%/43%), headache (30%/30%), diarrhea (18%/36%), cough (21%/30%), vomiting (25%/26%); grade ≥3 (excluding neoplasm progression): increased blood CPK (1%/11%), hypertension (4%/7%), increased lipase (3%/3%), pneumonia (1%/4%).

      Conclusion:
      Brigatinib has demonstrated substantial clinical activity in ALK+ NSCLC patients with brain metastases in both Ph1/2 and ALTA.

      IRC-Assessed Confirmed Intracranial Response Rates for Patients With Measurable Brain Metastases at Baseline
      Any No rad/active[a]
      Ph1/2[b] n=15 n=9
      iORR 8(53) 6(67)
      iDCR 13(87) 8(89)
      ALTA[c]
      Arm A n=26 n=19
      iORR 11(42) 8(42)
      iDCR 22(85) 16(84)
      Arm B n=18 n=15
      iORR 12(67) 11(73)
      iDCR 15(83) 14(93)
      Data are n(%) iDCR=intracranial disease control rate iORR=intracranial objective response rate IRC=independent review committee [a]No prior brain radiotherapy (Ph1/2); active (untreated or treated and progressed) brain lesions (ALTA) [b]NCT01449461; last scan date: October 8, 2015 [c]NCT02094573; last scan date: April 14, 2016


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