Reference Detail

Ref Type Journal Article
PMID (23274910)
Authors He L, Torres-Lockhart K, Forster N, Ramakrishnan S, Greninger P, Garnett MJ, McDermott U, Rothenberg SM, Benes CH, Ellisen LW
Title Mcl-1 and FBW7 control a dominant survival pathway underlying HDAC and Bcl-2 inhibitor synergy in squamous cell carcinoma.
Journal Cancer discovery
Vol 3
Issue 3
Date 2013 Mar
URL
Abstract Text Effective targeted therapeutics for squamous cell carcinoma (SCC) are lacking. Here, we uncover Mcl-1 as a dominant and tissue-specific survival factor in SCC, providing a roadmap for a new therapeutic approach. Treatment with the histone deacetylase (HDAC) inhibitor vorinostat regulates Bcl-2 family member expression to disable the Mcl-1 axis and thereby induce apoptosis in SCC cells. Although Mcl-1 dominance renders SCC cells resistant to the BH3-mimetic ABT-737, vorinostat primes them for sensitivity to ABT-737 by shuttling Bim from Mcl-1 to Bcl-2/Bcl-xl, resulting in dramatic synergy for this combination and sustained tumor regression in vivo. Moreover, somatic FBW7 mutation in SCC is associated with stabilized Mcl-1 and high Bim levels, resulting in a poor response to standard chemotherapy but a robust response to HDAC inhibitors and enhanced synergy with the combination vorinostat/ABT-737. Collectively, our findings provide a biochemical rationale and predictive markers for the application of this therapeutic combination in SCC.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Therapy Description
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
FBXW7 inact mut hematologic cancer sensitive Belinostat Preclinical Actionable In a preclinical study, Beleodaq (belinostat) inhibited human hematologic cancer cell lines harboring FBXW7 inactivating mutations in culture (PMID: 23274910). 23274910
FBXW7 inact mut Advanced Solid Tumor sensitive Entinostat Preclinical Actionable In a preclinical study, entinostat (MS-275) inhibited cancer cells from advanced solid tumors and hematological cells harboring FBXW7 inactivating mutations in culture (PMID: 23274910). 23274910
FBXW7 inact mut Advanced Solid Tumor sensitive AR-42 Preclinical Actionable In a preclinical study, AR-42 inhibited human cancer cell lines harboring FBXW7 inactivating mutations in culture (PMID: 23274910). 23274910
FBXW7 R505C head and neck squamous cell carcinoma sensitive Vorinostat Preclinical Actionable In a preclinical study, Zolinza (vorinostat) inhibited growth of a head and neck squamous cell carcinoma cell line harboring FBXW7 R505C in culture (PMID: 23274910). 23274910
FBXW7 inact mut hematologic cancer sensitive Entinostat Preclinical Actionable In a preclinical study, entinostat (MS-275) inhibited cancer cells from advanced solid tumors and hematological cells harboring FBXW7 inactivating mutations in culture (PMID: 23274910). 23274910
FBXW7 inact mut Advanced Solid Tumor resistant Docetaxel Preclinical Actionable In a preclinical study, human cancer cell lines harboring FBXW7 inactivating mutations were resistant to docetaxel in culture (PMID: 23274910). 23274910
FBXW7 inact mut hematologic cancer sensitive AR-42 Preclinical Actionable In a preclinical study, AR-42 inhibited human hematologic cancer cell lines harboring FBXW7 inactivating mutations in culture (PMID: 23274910). 23274910
FBXW7 inact mut Advanced Solid Tumor sensitive Belinostat Preclinical Actionable In a preclinical study, Beleodaq (belinostat) inhibited human cancer cell lines harboring FBXW7 inactivating mutations in culture (PMID: 23274910). 23274910