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Ref Type Journal Article
PMID (34838156)
Authors Wen PY, Stein A, van den Bent M, De Greve J, Wick A, de Vos FYFL, von Bubnoff N, van Linde ME, Lai A, Prager GW, Campone M, Fasolo A, Lopez-Martin JA, Kim TM, Mason WP, Hofheinz RD, Blay JY, Cho DC, Gazzah A, Pouessel D, Yachnin J, Boran A, Burgess P, Ilankumaran P, Gasal E, Subbiah V
Title Dabrafenib plus trametinib in patients with BRAFV600E-mutant low-grade and high-grade glioma (ROAR): a multicentre, open-label, single-arm, phase 2, basket trial.
Journal The Lancet. Oncology
Vol
Issue
Date 2021 Nov 24
URL
Abstract Text Effective treatments are needed to improve outcomes for high-grade glioma and low-grade glioma. The activity and safety of dabrafenib plus trametinib were evaluated in adult patients with recurrent or progressive BRAFV600E mutation-positive high-grade glioma and low-grade glioma.This study is part of an ongoing open-label, single-arm, phase 2 Rare Oncology Agnostic Research (ROAR) basket trial at 27 community and academic cancer centres in 13 countries (Austria, Belgium, Canada, France, Germany, Italy, Japan, the Netherlands, Norway, South Korea, Spain, Sweden, and the USA). The study enrolled patients aged 18 years or older with an Eastern Cooperative Oncology Group performance status of 0, 1, or 2. Patients with BRAFV600E mutation-positive high-grade glioma and low-grade glioma received dabrafenib 150 mg twice daily plus trametinib 2 mg once daily orally until unacceptable toxicity, disease progression, or death. In the high-grade glioma cohort, patients were required to have measurable disease at baseline using the Response Assessment in Neuro-Oncology high-grade glioma response criteria and have been treated previously with radiotherapy and first-line chemotherapy or concurrent chemoradiotherapy. Patients with low-grade glioma were required to have measurable non-enhancing disease (except pilocytic astrocytoma) at baseline using the Response Assessment in Neuro-Oncology low-grade glioma criteria. The primary endpoint, in the evaluable intention-to-treat population, was investigator-assessed objective response rate (complete response plus partial response for high-grade glioma and complete response plus partial response plus minor response for low-grade glioma). This trial is ongoing, but is closed for enrolment, NCT02034110.Between April 17, 2014, and July 25, 2018, 45 patients (31 with glioblastoma) were enrolled into the high-grade glioma cohort and 13 patients were enrolled into the low-grade glioma cohort. The results presented here are based on interim analysis 16 (data cutoff Sept 14, 2020). In the high-grade glioma cohort, median follow-up was 12·7 months (IQR 5·4-32·3) and 15 (33%; 95% CI 20-49) of 45 patients had an objective response by investigator assessment, including three complete responses and 12 partial responses. In the low-grade glioma cohort, median follow-up was 32·2 months (IQR 25·1-47·8). Nine (69%; 95% CI 39-91) of 13 patients had an objective response by investigator assessment, including one complete response, six partial responses, and two minor responses. Grade 3 or worse adverse events were reported in 31 (53%) patients, the most common being fatigue (five [9%]), decreased neutrophil count (five [9%]), headache (three [5%]), and neutropenia (three [5%]).Dabrafenib plus trametinib showed clinically meaningful activity in patients with BRAFV600E mutation-positive recurrent or refractory high-grade glioma and low-grade glioma, with a safety profile consistent with that in other indications. BRAFV600E testing could potentially be adopted in clinical practice for patients with glioma.Novartis.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
BRAF V600E low grade glioma sensitive Dabrafenib + Trametinib Phase II Actionable In a Phase II trial (ROAR), Tafinlar (dabrafenib) and Mekinist (trametinib) combination treatment resulted in an objective response rate of 69% (9/13, 1 complete response, 6 partial responses, 2 minor responses) in patients with low-grade glioma harboring BRAF V600E, with median duration of response, median progression-free survival, and overall survival time unreached (PMID: 34838156; NCT02034110). 34838156
BRAF V600E high grade glioma sensitive Dabrafenib + Trametinib Phase II Actionable In a Phase II trial (ROAR), Tafinlar (dabrafenib) and Mekinist (trametinib) combination treatment resulted in an objective response rate of 33% (15/45, 3 complete responses, 12 partial responses) in patients with high-grade glioma harboring BRAF V600E, with a median duration of response of 36.9 months, a median progression-free survival of 3.8 months, and an overall survival of 17.6 months (PMID: 34838156; NCT02034110). 34838156
BRAF V600E glioblastoma sensitive Dabrafenib + Trametinib Phase II Actionable In a Phase II trial (ROAR), Tafinlar (dabrafenib) and Mekinist (trametinib) combination treatment resulted in an objective response in 32% (10/31, 2 complete responses, 8 partial responses) and stable disease in 19% (6/31) of patients with glioblastoma harboring BRAF V600E (PMID: 34838156; NCT02034110). 34838156
BRAF V600E Advanced Solid Tumor sensitive Dabrafenib + Trametinib FDA approved Actionable In 3 Phase II trials (ROAR, NCI-MATCH, X2101) that supported FDA approval, Tafinlar (dabrafenib) and Mekinist (trametinib) combination therapy demonstrated safety and efficacy in adult and pediatric (6 years or older) patients with advanced solid tumors harboring BRAF V600E (PMID: 34838156, PMID: 32818466, J Clin Oncol 37, no. 15_suppl (May 20, 2019) 3002, J Clin Oncol 38, no. 15_suppl (May 20, 2020) 10506; NCT02034110, NCT02465060, NCT02124772). 32818466 detail... detail... 34838156 detail... detail...