Demonstration of a Genetic Therapeutic Index for Tumors Expressing Oncogenic BRAF by the Kinase Inhibitor SB-590885
| Autor: | Roberta S. Batorsky, Jerry L. Adams, Shu Yun Zhang, Michael D. Schaber, Rakesh Kumar, Julie Lougheed, Thomas J. Stout, Erin Hugger, Meenhard Herlyn, David Chau, Maureen L. Ho, Ami S. Lakdawala, Earl May, Rooja G. Contractor, Jae Lee, Pearl S. Huang, Andrew K. Takle, Hieu T. Do, Lusong Luo, David M. Wilson, Michael M. Morrissey, Lifu Wang, Cynthia M. Rominger, David A. Tuveson, Alastair J. King, Denis R. Patrick, David W. Rusnak, Keiran S.M. Smalley, Florian A. Karreth |
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| Rok vydání: | 2006 |
| Předmět: |
Models
Molecular Proto-Oncogene Proteins B-raf Cancer Research Protein Conformation Blotting Western Mice Nude Biology Crystallography X-Ray medicine.disease_cause Mice Cell Movement Mutant protein Cell Line Tumor Neoplasms Gene expression medicine Animals Humans Phosphorylation Extracellular Signal-Regulated MAP Kinases Protein Kinase Inhibitors Alleles Cell Proliferation Molecular Structure Kinase Imidazoles Xenograft Model Antitumor Assays Molecular biology Blot Oncology Protein kinase domain Mechanism of action Cell culture Mutation Cancer research Female medicine.symptom Crystallization Carcinogenesis HT29 Cells |
| Zdroj: | Cancer Research. 66:11100-11105 |
| ISSN: | 1538-7445 0008-5472 |
| DOI: | 10.1158/0008-5472.can-06-2554 |
| Popis: | Oncogenic BRAF alleles are both necessary and sufficient for cellular transformation, suggesting that chemical inhibition of the activated mutant protein kinase may reverse the tumor phenotype. Here, we report the characterization of SB-590885, a novel triarylimidazole that selectively inhibits Raf kinases with more potency towards B-Raf than c-Raf. Crystallographic analysis revealed that SB-590885 stabilizes the oncogenic B-Raf kinase domain in an active configuration, which is distinct from the previously reported mechanism of action of the multi-kinase inhibitor, BAY43-9006. Malignant cells expressing oncogenic B-Raf show selective inhibition of mitogen-activated protein kinase activation, proliferation, transformation, and tumorigenicity when exposed to SB-590885, whereas other cancer cell lines and normal cells display variable sensitivities or resistance to similar treatment. These studies support the validation of oncogenic B-Raf as a target for cancer therapy and provide the first evidence of a correlation between the expression of oncogenic BRAF alleles and a positive response to a selective B-Raf inhibitor. (Cancer Res 2006; 66(23): 11100-5) |
| Databáze: | OpenAIRE |
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