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Ref Type Journal Article
PMID (28784858)
Authors Drobysheva A, Klesse LJ, Bowers DC, Rajaram V, Rakheja D, Timmons CF, Wang J, Koral K, Gargan L, Ramos E, Park JY
Title Targeted MAPK Pathway Inhibitors in Patients With Disseminated Pilocytic Astrocytomas.
URL
Abstract Text This report presents a series of 5 pediatric patients with disseminated pilocytic astrocytomas and frequent nonfusion activating mutations. Genetic variants in these patients' tumors include BRAF p.Val600Glu, BRAF p.Val600Asp, and KRAS p.Gly60_Gln62ins7. The 2 patients with BRAF-mutated tumors were treated with dabrafenib or a combination of dabrafenib plus trametinib. The patients had either near complete resolution of the primary tumor (BRAF p.Val600Glu) or a stable primary tumor (BRAF p.Val600Asp). Both patients showed improvement in leptomeningeal dissemination without significant toxicity. Genomic testing of disseminated pilocytic astrocytomas, particularly those arising at extracerebellar locations, may result in the identification of mutations associated with ERK/MAPK activation. Patients with these activating mutations may benefit from targeted therapies.

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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 pilocytic astrocytoma predicted - sensitive Dabrafenib Case Reports/Case Series Actionable In a clinical case study, Tafinlar (dabrafenib) treatment resulted in a near complete response and resolution of leptomeningeal dissemination in a patient with pilocytic astrocytoma harboring BRAF V600E (PMID: 28784858). 28784858
BRAF V600D pilocytic astrocytoma predicted - sensitive Dabrafenib + Trametinib Case Reports/Case Series Actionable In a clinical case study, single Tafinlar (dabrafenib) and subsequent Tafinlar (dabrafenib) and Mekinist (trametinib) combination treatment resulted in disease stablization in a patient with pilocytic astrocytoma harboring BRAF V600D (PMID: 28784858). 28784858