Reference Detail

Ref Type

Journal Article

PMID

(31811016)

Authors

Hargrave DR, Bouffet E, Tabori U, Broniscer A, Cohen KJ, Hansford JR, Geoerger B, Hingorani P, Dunkel IJ, Russo MW, Tseng L, Dasgupta K, Gasal E, Whitlock JA, Kieran MW

Title

Efficacy and Safety of Dabrafenib in Pediatric Patients with BRAF V600 Mutation-Positive Relapsed or Refractory Low-Grade Glioma: Results from a Phase I/IIa Study.

Journal	Vol	Issue	Date	Pages	Journal Short Title
Clinical cancer research : an official journal of the American Association for Cancer Research	25	24	2019 Dec 15	7303-7311	Clin Cancer Res

URL

Abstract Text

Pediatric low-grade glioma (pLGG) is the most prevalent childhood brain tumor. Patients with BRAF V600 mutation-positive pLGG may benefit from treatment with dabrafenib. Part 2 of a phase I/IIa study, open-label study (NCT01677741) explores the activity and safety of dabrafenib treatment in these patients.Patients ages 1 to <18 years who had BRAF V600-mutant solid tumors (≥1 evaluable lesion) with recurrent, refractory, or progressive disease after ≥1 standard therapy were treated with oral dabrafenib 3.0 to 5.25 mg/kg/day (part 1) or at the recommended phase II dose (RP2D; part 2). Primary objectives were to determine the RP2D (part 1, results presented in a companion paper) and assess clinical activity (part 2). Here, we report the clinical activity, including objective response rates (ORRs) using Response Assessment in Neuro-Oncology criteria and safety across parts 1 and 2.Overall, 32 patients with pLGG were enrolled (part 1, n = 15; part 2, n = 17). Minimum follow-up was 26.2 months. Among all patients, the ORR was 44% [95% confidence interval (CI), 26-62] by independent review. The 1-year progression-free survival rate was 85% (95% CI, 64-94). Treatment-related adverse events (AE) were reported in 29 patients (91%); the most common was fatigue (34%). Grade 3/4 treatment-related AEs were reported in 9 patients (28%).Dabrafenib demonstrated meaningful clinical activity and acceptable tolerability in patients with BRAF V600-mutant pLGG.

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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 V600X	low grade glioma	predicted - sensitive	Dabrafenib	Phase Ib/II	Actionable	In a Phase I/II trial, Tafinlar (dabrafenib) treatment was well tolerated and demonstrated preliminary efficacy, resulted in an objective response rate of 44% (14/32, 1 complete response, 13 partial response) and a disease control rate of 78% (25/32), with a median duration of response of 26 months in pediatric patients with BRAF V600-mutant low-grade gliomas (PMID: 31811016; NCT01677741).	31811016
BRAF V600X	ganglioglioma	predicted - sensitive	Dabrafenib	Case Reports/Case Series	Actionable	In a Phase I/II trial, Tafinlar (dabrafenib) treatment resulted in a partial response in a pediatric patient with BRAF V600-mutant ganglioglioma (PMID: 31811016; NCT01677741).	31811016