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Updated: Aug 19, 2026

Characterize Disease-related Mutants of RAF Family Kinases by Using a Set of Practical and Feasible Methods
Published on: July 17, 2019
Raf kinase inhibitors in oncology
Dirk Strumberg1, Siegfried Seeber
1Department of Internal Medicine and Medical Oncology, West German Cancer Center, University of Essen, Germany. dirk.strumberg@uni-essen.de
Abstract:
The importance of the MAP kinase pathway, which includes the kinases Raf, MEK1/2, and ERK1/2, for the proliferation and survival of tumor cells recently increased with the discovery of activating BRAF mutations in human tumors. Therefore, in addition to a role in controlling tumors with Ras mutations and activated growth factor receptors, inhibitors of Raf kinase may harbor therapeutic potential in tumors carrying a BRAF oncogene. A variety of agents have been discovered to interfere with Raf kinase, including antisense oligonucleotides and small molecules. These inhibitors prevent the expression of Raf protein, block Ras/Raf interaction, or obstruct its kinase activity. Raf inhibitors that are currently undergoing clinical evaluation show promising signs of anti-cancer efficacy with a very tolerable safety profile. Clinically most advanced is the Raf inhibitor BAY 43-9006, which recently entered phase III clinical testing. This review addresses the rationale for targeting Raf kinase and the current status of various pharmacological approaches.
Insights
Targeting the Raf kinase pathway, including Raf, MEK1/2, and ERK1/2, shows therapeutic potential for tumors with BRAF mutations. Raf inhibitors demonstrate anti-cancer efficacy and a tolerable safety profile in clinical evaluations.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- The MAP kinase pathway, comprising Raf, MEK1/2, and ERK1/2, is crucial for tumor cell proliferation and survival.
- Activating BRAF mutations in human tumors highlight the therapeutic potential of targeting this pathway.
Purpose of the Study:
- To review the rationale for targeting Raf kinase in cancer treatment.
- To summarize the current status of pharmacological approaches, including Raf inhibitors.
Main Methods:
- Review of scientific literature on the MAP kinase pathway and Raf inhibitors.
- Analysis of preclinical and clinical data for Raf-targeting agents.
Main Results:
- Raf inhibitors can prevent Raf protein expression, block Ras/Raf interaction, or inhibit kinase activity.
- Clinically evaluated Raf inhibitors show promising anti-cancer efficacy with good safety profiles.
- BAY 43-9006 is the most advanced Raf inhibitor, currently in phase III clinical trials.
Conclusions:
- Targeting the Raf kinase pathway is a viable strategy for treating tumors with BRAF oncogenes.
- Pharmacological inhibition of Raf kinase offers a promising therapeutic avenue with a favorable safety profile.
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