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Ref Type Journal Article
PMID (17210691)
Authors Gray-Schopfer VC, Karasarides M, Hayward R, Marais R
Title Tumor necrosis factor-alpha blocks apoptosis in melanoma cells when BRAF signaling is inhibited.
Abstract Text The protein kinase BRAF, a component of the RAS/RAF/mitogen-activated protein kinase/extracellular signal-regulated kinase (ERK) kinase (MEK)/ERK signaling pathway, regulates cell fate in response to extracellular signals. Activating mutations in BRAF occur in approximately 70% of human melanomas. The active proteins stimulate constitutive pathway signaling, proliferation, and survival. Thus, inhibition of BRAF signaling in melanoma cells causes cell cycle arrest and induces cell death through apoptosis, validating BRAF as an important therapeutic target. Here, we show that the apoptosis induced by inhibition of BRAF signaling in melanoma cells can be prevented if the cells are treated with tumor necrosis factor (TNF)-alpha. This allows the cells to recover from the inhibition of BRAF signaling and reenter the cell cycle. This effect occurs due to a specific TNF-alpha and BRAF interaction because TNF-alpha does not prevent cell death in the presence of cisplatin, nitrogen mustard or thapsigargin. Furthermore, the cytokines Fas ligand, TNF-related apoptosis-inducing ligand, interleukin (IL)-1, and IL-6 do not prevent cell death when BRAF signaling is inhibited. The survival mechanism requires nuclear factor-kappaB (NF-kappaB) transcription factor activity, which is strongly induced by TNF-alpha in these cells. These findings suggest that drugs that target the BRAF/MEK pathway could be combined with agents that target TNF-alpha and/or NF-kappaB signaling to provide exciting new therapeutic opportunities for the treatment of melanoma.


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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
BRAF V600D melanoma sensitive CCT196969 Preclinical Actionable In a preclinical study, CCT196969 inhibited MEK and ERK phosphorylation and growth of melanoma cells harboring BRAF V600D in culture (PMID: 25500121, PMID: 17210691). 25500121 17210691
BRAF V600D melanoma sensitive CCT241161 Preclinical Actionable In a preclinical study, CCT241161 inhibited MEK and ERK phosphorylation and growth of melanoma cells harboring BRAF V600D in culture (PMID: 25500121, PMID: 17210691). 25500121 17210691