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Black Diamond Therapeutics Announces Initial Phase 2 Data Demonstrating Robust Anti-tumor Activity of BDTX-1535 in Patients with Recurrent EGFRm NSCLC who Present with a Broad Spectrum of Classical, Non-classical, and C797S Resistance Mutations
BDTX-1535 dose of 200 mg daily selected for pivotal development; favorable tolerability profile and no new safety signals observed Preliminary ORR of 42% in
About this update from Black Diamond Therapeutics, Inc.
[{"type":"text","content":"BDTX-1535 dose of 200 mg daily selected for pivotal development; favorable tolerability profile and no new safety signals observed Preliminary ORR of 42% in 19 patients at 200 mg with on-target resistance EGFR mutations Encouraging durability with DOR of approximately 8 months or more for first 3 patients with a PR; 14 of 19 patients remain on treatment Regulatory feedback on registration path anticipated in Q1 2025 Initial results of BDTX-1535 in first-line NSCLC patients with non-classical EGFR mutations expected Q1 2025 CAMBRIDGE, Mass., Sept. 23, 2024 (GLOBE NEWSWIRE) -- Black Diamond Therapeutics, Inc. (Nasdaq: BDTX), a clinical-stage oncology company developing MasterKey therapies that target families of oncogenic mutations in patients with cancer, today reported initial Phase 2 data demonstrating encouraging clinical responses and durability of BDTX-1535 in patients with relapsed/refractory epidermal growth factor receptor (EGFR)-mutant (EGFRm) non-small cell lung cancer (NSCLC). “Patients often become resistant to osimertinib with the emergence of on-target resistance EGFR mutations,” said Sergey Yurasov, M.D., Chief Medical Officer of Black Diamond Therapeutics. “Our preliminary Phase 2 data demonstrate the potential of BDTX-1535 to deliver durable responses for these patients.” “Patients with recurrent EGFRm NSCLC have few treatment options, with chemotherapy delivering limited benefit and significant toxicity, and initial Phase 2 data with BDTX-1535 look quite promising,” said Danny Nguyen, M.D., Assistant Clinical Professor, Department of Medical Oncology and Therapeutics Research at City of Hope. “There is a significant unmet medical need for an effective and well-tolerated oral therapy for patients who progress on osimertinib, as well as newly diagnosed patients with non-classical mutations.” Phase 2 preliminary data overview: The phase 2 trial began in August of 2023, and enrolled relapsed/refractory patients with non-classical EGFR mutations (NCMs) (Cohort 1) and those with C797S resistance mutations (Cohort 2). Safety assessment and dose selection were based upon the first 40 patients randomized to receive BDTX-1535 once daily at either 100 mg or 200 mg across both Cohorts. Preliminary response rate and durability were assessed in 27 patients at 200 mg with an August 17, 2024, data cutoff, including 22 response-...