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Ref Type Journal Article
PMID (27307593)
Authors Niessner H, Schmitz J, Tabatabai G, Schmid AM, Calaminus C, Sinnberg T, Weide B, Eigentler TK, Garbe C, Schittek B, Quintanilla-Fend L, Bender B, Mai M, Praetorius C, Beissert S, Schackert G, Muders MH, Meinhardt M, Baretton GB, Dummer R, Flaherty K, Pichler BJ, Kulms D, Westphal D, Meier F
Title PI3K Pathway Inhibition Achieves Potent Antitumor Activity in Melanoma Brain Metastases In Vitro and In Vivo.
Journal Vol Issue Date Pages Journal Short Title
Clinical cancer research : an official journal of the American Association for Cancer Research 22 23 2016 Dec 01 5818-5828 Clin Cancer Res
URL
Abstract Text Great advances have recently been made in treating patients with metastatic melanoma. However, existing therapies are less effective on cerebral than extracerebral metastases. This highlights the potential role of the brain environment on tumor progression and drug resistance and underlines the need for "brain-specific" therapies. We previously showed that the PI3K-AKT survival pathway is hyperactivated in brain but not extracerebral melanoma metastases and that astrocyte-conditioned medium activates AKT in melanoma cells in vitro We therefore tested the PI3K inhibitor buparlisib as an antitumor agent for melanoma brain metastases.Buparlisib inhibited AKT activity, decreased proliferation, and induced apoptosis in metastatic melanoma cell lines and short-term brain melanoma cells, irrespective of their BRAF and NRAS mutation status. In addition, buparlisib inhibited hyperactivated AKT and induced apoptosis in melanoma cells that were stimulated with astrocyte-conditioned medium. The growth of tumors induced by injecting human BRAF- and NRAS-mutant metastatic melanoma cells into the brain of mice was significantly inhibited by buparlisib.These results emphasize the value of targeting the PI3K pathway as a strategy to develop drugs for melanoma brain metastases. Clin Cancer Res; 22(23); 5818-28. ©2016 AACR.

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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 wild-type NRAS wild-type melanoma sensitive Binimetinib + Buparlisib Preclinical - Cell culture Actionable In a preclinical study, the combination of Binimetinib (MEK162) and Buparlisib (BKM120) resulted in improved cell growth inhibition compared to either agent alone in a metastatic melanoma cell line with wild-type BRAF and wild-type NRAS in culture (PMID: 27307593). 27307593
BRAF mutant melanoma sensitive Binimetinib + Buparlisib Preclinical - Cell culture Actionable In a preclinical study, the combination of Binimetinib (MEK162) and Buparlisib (BKM120) resulted in improved cell growth inhibition compared to either agent alone in a metastatic melanoma cell line harboring a BRAF mutation in culture (PMID: 27307593). 27307593
NRAS mutant melanoma sensitive Binimetinib + Buparlisib Preclinical - Cell culture Actionable In a preclinical study, the combination of Binimetinib (MEK162) and Buparlisib (BKM120) resulted in improved cell growth inhibition compared to either agent alone in a metastatic melanoma cell line harboring an NRAS mutation (PMID: 27307593). 27307593
BRAF mutant melanoma sensitive Buparlisib Preclinical - Cell line xenograft Actionable In a preclinical study, Buparlisib (BKM120) treatment in human melanoma cell line xenograft models with brain metastases and harboring a BRAF mutation resulted in inhibition of brain tumor growth (PMID: 27307593). 27307593
BRAF mutant melanoma sensitive Buparlisib + Encorafenib Preclinical - Cell culture Actionable In a preclinical study, the combination of Buparlisib (BKM120) and Encorafenib (LGX818) resulted in improved cell growth inhibition compared to either agent alone in a metastatic melanoma cell line harboring a BRAF mutation in culture (PMID: 27307593). 27307593
NRAS mutant melanoma sensitive Buparlisib Preclinical - Cell line xenograft Actionable In a preclinical study, Buparlisib (BKM120) treatment in human melanoma cell line xenograft models with brain metastases and harboring an NRAS mutation resulted in inhibition of brain tumor growth and an improved survival benefit (PMID: 27307593). 27307593