Reference Detail

Ref Type

Journal Article

PMID

(27659046)

Authors

Horn T, Ferretti S, Ebel N, Tam A, Ho S, Harbinski F, Farsidjani A, Zubrowski M, Sellers WR, Schlegel R, Porter D, Morris E, Wuerthner J, Jeay S, Greshock J, Halilovic E, Garraway LA, Caponigro G, Lehár J

Title

High-Order Drug Combinations Are Required to Effectively Kill Colorectal Cancer Cells.

Journal	Vol	Issue	Date	Pages	Journal Short Title
Cancer research	76	23	2016 Dec 01	6950-6963	Cancer Res

URL

Abstract Text

Like classical chemotherapy regimens used to treat cancer, targeted therapies will also rely upon polypharmacology, but tools are still lacking to predict which combinations of molecularly targeted drugs may be most efficacious. In this study, we used image-based proliferation and apoptosis assays in colorectal cancer cell lines to systematically investigate the efficacy of combinations of two to six drugs that target critical oncogenic pathways. Drug pairs targeting key signaling pathways resulted in synergies across a broad spectrum of genetic backgrounds but often yielded only cytostatic responses. Enhanced cytotoxicity was observed when additional processes including apoptosis and cell cycle were targeted as part of the combination. In some cases, where cell lines were resistant to paired and tripled drugs, increased expression of antiapoptotic proteins was observed, requiring a fourth-order combination to induce cytotoxicity. Our results illustrate how high-order drug combinations are needed to kill drug-resistant cancer cells, and they also show how systematic drug combination screening together with a molecular understanding of drug responses may help define optimal cocktails to overcome aggressive cancers. Cancer Res; 76(23); 6950-63. ©2016 AACR.

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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 mut TP53 wild-type	colorectal cancer	sensitive	CGM097 + Dabrafenib + Navitoclax + PF-04217903	Preclinical - Cell culture	Actionable	In a preclinical study, the combination of Navitoclax (ABT-263), CGM097, Tafinlar (dabrafenib), and PF04217903 resulted in the greatest synergistic effect and inhibition of cell growth in colorectal cancer cells harboring a BRAF mutation and wild-type TP53 in culture compared to the double or triple combinations of the therapies (PMID: 27659046).	27659046
BRAF mut TP53 mut	colorectal cancer	sensitive	Alpelisib + Dabrafenib + Erlotinib + Navitoclax	Preclinical - Cell culture	Actionable	In a preclinical study, the combination of Navitoclax (ABT-263), Alpelisib (BYL719), Tafinlar (dabrafenib), and Tarceva (erlotinib) resulted in the greatest synergistic effect and inhibition of cell growth in colorectal cancer cells harboring a BRAF mutation and TP53 mutation in culture compared to the double or triple combinations of the therapies (PMID: 27659046).	27659046