Activating BRAF gene mutations are uncommon in hormone refractory prostate cancer in Caucasian patients

J Köllermann1, H Albrecht, T Schlomm

  • 1Department of Pathology, Hospital Eltville, Eltville/Rhein.

Oncology Letters
|September 12, 2012
PubMed

Insights

Activating BRAF mutations are rare in Caucasian prostate cancer patients and do not drive tumor progression. Therefore, therapies targeting BRAF may not benefit advanced prostate cancer.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Activating mutations in BRAF, a serine/threonine kinase, are implicated in various cancers.
  • BRAF activation fuels tumor growth through the MAP/ERK kinase pathway, making it a therapeutic target.
  • Previous studies indicated BRAF mutations in approximately 10% of prostate cancer cases in Asian populations.

Purpose of the Study:

  • To investigate the prevalence of BRAF mutations in hormone-refractory prostate cancer.
  • To assess the potential efficacy of anti-BRAF therapy for advanced prostate cancer in Caucasian patients.

Main Methods:

  • Analysis of 43 hormone-refractory prostate cancer samples for BRAF mutations.
  • PCR amplification and sequencing of BRAF exons 11 and 15.

Main Results:

  • BRAF mutations were detected only in positive control tissues.
  • No BRAF mutations were identified in any of the 43 prostate cancer samples analyzed.
  • BRAF mutations appear to be rare in prostate cancer among Caucasian patients.

Conclusions:

  • BRAF mutations are infrequently found in prostate cancers of Caucasian origin.
  • BRAF mutations are not associated with prostate cancer progression.
  • Anti-BRAF therapies are unlikely to be beneficial for the majority of prostate cancer patients.

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