Reference Detail

Ref Type Journal Article
PMID (26909611)
Authors Ku BM, Yi SY, Koh J, Bae YH, Sun JM, Lee SH, Ahn JS, Park K, Ahn MJ
Title The CDK4/6 inhibitor LY2835219 has potent activity in combination with mTOR inhibitor in head and neck squamous cell carcinoma.
Journal Oncotarget
Vol 7
Issue 12
Date 2016 Mar 22
URL
Abstract Text Deletion of CDKN2A (p16) or amplification of CCND1 (cyclin D1) occurs commonly in head and neck squamous cell carcinoma (HNSCC) and induces sustained cyclin-dependent kinase (CDK) 4/6 activation. Here, we report the antiproliferative activity of LY2835219, a selective CDK4/6 inhibitor through inhibition of CDK4/6-dependent Ser780 phosphorylation in retinoblastoma (RB) and induction of cell cycle arrest in HNSCC cells. In addition, we demonstrated the antitumor effects of HNSCC xenografts to LY2835219 in vivo. Given the limited effect in HNSCC as a single-agent treatment with LY2835219, a combinational strategy is required to enhance antitumor activity. At the molecular level, we found that LY2835219 inhibited activation of AKT and ERK, but not mTOR. The combination of LY2835219 with mTOR inhibitor was found to be more effective than either drug alone in vitro and in vivo. Taken together, our findings suggest that a combinational treatment with LY2835219 and mTOR inhibitor is a promising therapeutic approach for HNSCC.

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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
Unknown unknown head and neck squamous cell carcinoma not applicable Abemaciclib Preclinical Actionable In a preclinical study, Abemaciclib (LY2835219) reduced RB and AKT activation, and inhibited cell proliferation and colony formation in head and neck squamous cell carcinoma (HNSCC) cell lines in culture, and inhibited tumor growth in HNSCC xenograft models (PMID: 26909611). 26909611
Unknown unknown head and neck squamous cell carcinoma not applicable Abemaciclib + Torin 2 Preclinical Actionable In a preclinical study, the combination of Abemaciclib (LY2835219) and Torin2 worked synergistically to reduce viability of head and neck squamous cell carcinoma cells in culture (PMID: 26909611). 26909611
Unknown unknown head and neck squamous cell carcinoma not applicable Abemaciclib + Everolimus Preclinical - Cell line xenograft Actionable In a preclinical study, the combination of Abemaciclib (LY2835219) and Afinitor (everolimus) worked synergistically to reduce viability of head and neck squamous cell carcinoma (HNSCC) cells in culture, and to inhibit tumor growth in HNSCC cell line xenograft models, with increased efficacy over either agent alone (PMID: 26909611). 26909611