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Updated: May 21, 2026

Characterize Disease-related Mutants of RAF Family Kinases by Using a Set of Practical and Feasible Methods
Published on: July 17, 2019
Vemurafenib (RG67204, PLX4032): a potent, selective BRAF kinase inhibitor
Samit Patrawala1, Igor Puzanov
1Vanderbilt-Ingram Cancer Center, Division of Hematology-Oncology, Vanderbilt University Medical Center, 2220 Pierce Avenue, 777 Preston Research Building, Nashville, TN 37232-6307, USA.
Abstract:
Vemurafenib is a potent inhibitor of the mutated BRAF kinase. Phase I and II clinical trials of vemurafenib showed response rates of more than 50% in patients with metastatic melanoma and BRAF mutation. A Phase III study comparing vemurafenib with dacarbazine in 675 previously untreated patients revealed overall survival to be 84% (95% CI: 78-89) in the vemurafenib group and 64% (95% CI: 56-73) in the dacarbazine group. Vemurafenib was associated with a relative reduction of 63% in the risk of death and 74% in the risk of either death or disease progression, as compared with dacarbazine (p < 0.001). Progression-free survival was longer in those treated with vemurafenib (median: 5.3 vs 1.6 months; hazard ratio: 0.26; 95% CI: 0.20-0.33). Response rates were 48% for vemurafenib and 5% for dacarbazine. After review of the interim analysis by an independent data and safety monitoring board, crossover from dacarbazine to vemurafenib was recommended.
Insights
Vemurafenib significantly improves survival and response rates in patients with metastatic melanoma harboring BRAF mutations. This targeted therapy demonstrated a marked reduction in the risk of death and disease progression compared to dacarbazine.
Area of Science:
- Oncology
- Pharmacology
- Genetics
Background:
- Metastatic melanoma with BRAF mutations presents a significant therapeutic challenge.
- Targeted therapies offer new hope for improving patient outcomes.
Purpose of the Study:
- To evaluate the efficacy and safety of vemurafenib compared to dacarbazine in patients with metastatic melanoma and BRAF mutations.
Main Methods:
- A Phase III randomized controlled trial involving 675 previously untreated patients.
- Comparison of vemurafenib versus dacarbazine, with crossover permitted.
Main Results:
- Vemurafenib showed significantly higher overall survival (84% vs. 64%) and response rates (48% vs. 5%) compared to dacarbazine.
- Vemurafenib reduced the risk of death by 63% and death or progression by 74%.
- Progression-free survival was substantially longer with vemurafenib (median 5.3 vs. 1.6 months).
Conclusions:
- Vemurafenib is a highly effective treatment for metastatic melanoma with BRAF mutations.
- The study supports vemurafenib as a superior treatment option over dacarbazine.
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