Reference Detail

Ref Type Journal Article
PMID (26487278)
Authors Bridgeman VL, Wan E, Foo S, Nathan MR, Welti JC, Frentzas S, Vermeulen PB, Preece N, Springer CJ, Powles T, Nathan PD, Larkin J, Gore M, Vasudev NS, Reynolds AR
Title Preclinical Evidence That Trametinib Enhances the Response to Antiangiogenic Tyrosine Kinase Inhibitors in Renal Cell Carcinoma.
Journal Molecular cancer therapeutics
Vol 15
Issue 1
Date 2016 Jan
URL
Abstract Text Sunitinib and pazopanib are antiangiogenic tyrosine kinase inhibitors (TKI) used to treat metastatic renal cell carcinoma (RCC). However, the ability of these drugs to extend progression-free and overall survival in this patient population is limited by drug resistance. It is possible that treatment outcomes in RCC patients could be improved by rationally combining TKIs with other agents. Here, we address whether inhibition of the Ras-Raf-MEK-ERK1/2 pathway is a rational means to improve the response to TKIs in RCC. Using a xenograft model of RCC, we found that tumors that are resistant to sunitinib have a significantly increased angiogenic response compared with tumors that are sensitive to sunitinib in vivo. We also observed significantly increased levels of phosphorylated ERK1/2 in the vasculature of resistant tumors, when compared with sensitive tumors. These data suggested that the Ras-Raf-MEK-ERK1/2 pathway, an important driver of angiogenesis in endothelial cells, remains active in the vasculature of TKI-resistant tumors. Using an in vitro angiogenesis assay, we identified that the MEK inhibitor (MEKI) trametinib has potent antiangiogenic activity. We then show that, when trametinib is combined with a TKI in vivo, more effective suppression of tumor growth and tumor angiogenesis is achieved than when either drug is utilized alone. In conclusion, we provide preclinical evidence that combining a TKI, such as sunitinib or pazopanib, with a MEKI, such as trametinib, is a rational and efficacious treatment regimen for RCC.

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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
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
VHL V155fs kidney cancer predicted - sensitive Sunitinib + Trametinib Preclinical - Pdx Actionable In a preclinical study, the combination of Mekinist (trametinib) and Sutent (sunitinib) inhibited tumor growth in patient-derived xenograft models of renal cancer harboring VHL V155fs (referred to as V155fs*4) (PMID: 26487278). 26487278
Unknown unknown renal cell carcinoma not applicable Pazopanib + Trametinib Preclinical - Cell line xenograft Actionable In a preclinical study, combination of Mekinist (trametinib) and Votrient (pazopanib) effectively inhibited tumor angiogenesis and growth in cell line xenograft models of renal cell carcinoma (PMID: 26487278). 26487278
Unknown unknown renal cell carcinoma not applicable Sunitinib + Trametinib Preclinical - Cell line xenograft Actionable In a preclinical study, combination of Mekinist (trametinib) and Sutent (sunitinib) effectively inhibited tumor angiogenesis and growth in cell line xenograft models of Sutent (sunitinib)-refractory renal cell carcinoma (PMID: 26487278). 26487278