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Updated: May 18, 2026

Characterize Disease-related Mutants of RAF Family Kinases by Using a Set of Practical and Feasible Methods
Published on: July 17, 2019
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.
Abstract:
Activating mutations in the cytosolic serine/threonine kinase, BRAF, have been reported in a variety of neoplasms. BRAF activation may contribute to tumor growth via activation of the MAP/ERK kinase pathway, and BRAF represents a possible therapeutic target. Activating BRAF mutations were recently reported in approximately 10% of prostate cancer cases in Asian patients. In the present study, 43 hormone refractory prostate cancers were analyzed for BRAF mutations in order to determine whether anti-BRAF therapy is a suitable approach for advanced prostate cancer patients. In all of the studied tumors, BRAF exons 11 and 15 were PCR-amplified and sequenced, including the backward and forward sequences. BRAF mutations were noted only in the positive control tissues, but were not found in any of the 43 analyzed prostate cancers. We conclude that BRAF mutations occur only rarely in prostate cancers in Caucasian patients and are not associated with tumor progression. The application of anti-BRAF therapies may therefore not be beneficial for prostate cancer.
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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