Activating mutations in the BRAF gene, primarily at V600E, are associated with poorer outcomes in patients with papillary thyroid cancer. MAPK kinase (MEK), immediately downstream of BRAF, is a promising target for ras-raf-MEK-ERK pathway inhibition. In addition to thyroid cancer, BRAF-activating mutations are prevalent in melanoma (-59%), colorectal cancer (5–22%), serous ovarian cancer (-30%), and several other tumor types. [1]
Four lines bearing V600E BRAF mutations were all sensitive to AZD6244, with GI50 values ranging from 14 to 50 nM. A positive control BRAF mutant melanoma line, SKMel28, [2]exhibited a similar GI50 of 23 nM.
Activation of FOXO3a is sufficient to feverse mitogen-activated protein/extracellular signal-regulated kinase kinase inhibitor chemoresistance in human cancer.
The Akt inhibitor MK2206 synergizes, but Perifosine antagonizes, the BRAFV600E inhibitor PLX4032 and the MEK1/2 inhibitor AZD6244 in the inhibition of thyroid cancer cells.
Blockade of the MEK/ERK signalling cascade by AS703026, a novel selective MEK1/2 inhibitor, induces pleiotropic anti-myeloma activity in vitro and in vivo.
Involvement of epidermal growth factor receptor signaling in estrogen inhibition of oocyte maturation mediated through the G protein-coupled estrogen receptor (Gper) in zebrafish (Danio rerio).
Selective inhibition of extracellular signal-regulated kinases 1/2 blocks nerve growth factor to brain-derived neurotrophic factor signaling and suppresses the development of and reverses already established pain behavior in rats.
Data from [NATURE 2010;468, 973-977]
AZD6244 (Selumetinib) purchased from Selleck
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Qingsong Liu, Ph.DProf. Nathanael Gray Lab Dana-Farber Cancer Institute Biological Chemistry and Molecular Pharmacology Harvard Medical School
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Todd.Pittsucdenver.edu
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