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Lack of BRAF V600E protein expression in primary central nervous system lymphoma

Anna S Berghoff1, David Capper, Matthias Preusser

  • 1Department of Neuropathology, Institute of Neurology, Medical University of Vienna, Vienna, Austria.

Applied Immunohistochemistry & Molecular Morphology : AIMM
|December 14, 2012
PubMed
Abstract

Insights

The BRAF V600E mutation is not found in primary central nervous system lymphoma (PCNSL). Therefore, BRAF V600E is not a viable drug target for treating this rare cancer.

Area of Science:

  • Oncology
  • Molecular Biology
  • Immunohistochemistry

Background:

  • BRAF V600E mutations are common in various cancers like melanoma and thyroid cancer.
  • Targeted BRAF inhibitors are effective treatments for these malignancies.
  • The role of BRAF V600E in primary central nervous system lymphoma (PCNSL) was previously unclear.

Purpose of the Study:

  • To determine the expression of BRAF V600E protein in primary central nervous system lymphoma (PCNSL).
  • To assess the potential of BRAF V600E as a therapeutic target in PCNSL.

Main Methods:

  • BRAF V600E expression was analyzed in 20 PCNSL tissue specimens.
  • Immunohistochemistry using the mutation-specific VE1 antibody was employed.
  • Specimens were formalin-fixed and paraffin-embedded.

Main Results:

  • The study included 20 immunocompetent patients (10 male, 10 female) with a median age of 60.
  • All PCNSL cases were classified as diffuse large B-cell lymphomas.
  • No specific immunoreactivity for the BRAF V600E mutation was detected in any of the samples.

Conclusions:

  • The BRAF V600E mutation is not pathobiologically relevant in PCNSL.
  • BRAF V600E does not represent a feasible drug target for PCNSL treatment.
  • This finding impacts the development of targeted therapies for PCNSL.

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