A Biospecimen Collection Study in BRAF-V600E Mutated Recurrent Gliomas

  • End date
    May 19, 2024
  • participants needed
  • sponsor
    Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Updated on 4 October 2022
brain tumor
anaplastic astrocytoma
astrocytoma, anaplastic
primary brain tumors
pleomorphic xanthoastrocytoma


This is a surgical biospecimen collection study. The purpose of this study is to understand how much of two drugs (dabrafenib and trametinib) are able to penetrate brain tumors and turn off the RAF signaling pathway. This is important because these drugs are currently FDA approved for other tumors and may have efficacy in brain tumors with the BRAF V600E mutation.


The primary goal of this study is to establish concentrations of dabrafenib and trametinib in enhancing brain tissue and cerebrospinal fluid from people with BRAF-V600E mutant recurrent gliomas who undergo tumor resection. The exploratory goals are to measure the amount of ERK signaling pathway activity, to identify mechanisms of resistance to these drugs, and evaluate feasibility of measuring tumor DNA in cerebrospinal fluid.

People (adults or children) with brain tumors who are already taking dabrafenib and / or trametinib and are in need of a surgical resection are potentially eligible. On the day of surgery, blood, cerebrospinal fluid, and tumor tissue will be collected for research purposes.

Condition Glioma, BRAF V600E, Pleomorphic Xantho-Astrocytoma, Glioblastoma
Treatment Surgical Cohort
Clinical Study IdentifierNCT03593993
SponsorSidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Last Modified on4 October 2022


Yes No Not Sure

Inclusion Criteria

Subjects must have a history of primary brain tumor (including but not limited to glioblastoma (GBM), anaplastic astrocytoma (AA), anaplastic ganglioglioma (AG), and anaplastic pleomorphic xanthoastrocytoma (PXA))
Subjects must have a BRAF-V600 mutation identified in previous tissue analysis (may be IHC or PCR based). Allowable mutations include V600E, V600K, V600R, and V600D
Subjects must be taking dabrafenib at a dose of at least 50mg twice daily (adults only) and / or trametinib at a dose of at least 1mg daily (adults only) for at least 7 days prior to surgery as prescribed by their treating physician. Note: Pediatric patients may be taking any dose of dabrafenib and / or trametinib as prescribed by their treating physician for at least 7 days prior to surgery
Subjects must be undergoing surgery for clinical purposes
Written informed consent - a signed informed consent and/or assent (as age appropriate) for study participation will be obtained according to institutional guidelines

Exclusion Criteria

Subjects who are receiving any other investigational agents or chemotherapeutic agents
Subjects for whom collection of blood, spinal fluid, or tissue samples is unsafe or clinically inadvisable
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Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

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If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

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