Reference Detail

Ref Type

Journal Article

PMID

(27196767)

Authors

Kjær I, Lindsted T, Fröhlich C, Olsen JV, Horak ID, Kragh M, Pedersen MW

Title

Cetuximab Resistance in Squamous Carcinomas of the Upper Aerodigestive Tract Is Driven by Receptor Tyrosine Kinase Plasticity: Potential for mAb Mixtures.

Journal	Vol	Issue	Date	Pages	Journal Short Title
Molecular cancer therapeutics	15	7	2016 Jul	1614-26	Mol Cancer Ther

URL

Abstract Text

Squamous cell carcinomas (SCC) arising in upper parts of the aerodigestive tract are among the leading causes of death worldwide. EGFR has been found to play an essential role in driving the malignancy of SCC of the upper aerodigestive tract (SCCUAT), but, despite this, clinical results using a range of different EGFR-targeted agents have been disappointing. Cetuximab is currently the only EGFR-targeted agent approved by the FDA for treatment of SCCUAT. However, intrinsic and acquired cetuximab resistance is a major problem for effective therapy. Thus, a better understanding of the mechanisms responsible for cetuximab resistance is valuable for development of the next generation of antibody therapeutics. In order to better understand the underlying mechanisms of cetuximab resistance in SCCUAT, we established from cetuximab-sensitive models cell lines with acquired resistance to cetuximab by continuous selective pressure in vitro and in vivo Our results show that resistant clones maintain partial dependency on EGFR and that receptor tyrosine kinase plasticity mediated by HER3 and IGF1R plays an essential role. A multitarget mAb mixture against EGFR, HER3, and IGF1R was able to overcome cetuximab resistance in vitro To our surprise, these findings could be extended to include SCCUAT cell lines with intrinsic resistance to cetuximab, suggesting that the triad consisting of EGFR, HER3, and IGF1R plays a key role in SCCUAT. Our results thus provide a rationale for simultaneous targeting of EGFR, HER3, and IGF1R in SCCUAT. Mol Cancer Ther; 15(7); 1614-26. ©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
TP53 mutant	hypopharynx cancer	predicted - sensitive	unspecified EGFR antibody + unspecified IGF-1R antibody	Preclinical - Cell culture	Actionable	In a preclinical study, combination of an unspecified EGFR antibody and an unspecified Igf-1r antibody resulted in inhibition of survival in TP53 mutated hypopharyngeal carcinoma cancer cells that developed Erbitux (cetuximab) resistance in culture (PMID: 27196767).	27196767
TP53 mutant	hypopharynx cancer	predicted - sensitive	unspecified EGFR antibody + unspecified ERBB3 antibody + unspecified IGF-1R antibody	Preclinical - Cell culture	Actionable	In a preclinical study, combination of an unspecified EGFR antibody, an unspecified Erbb3 (Her3) antibody, and an unspecified Igf-1r antibody resulted in potent inhibition of survival in TP53 mutated hypopharyngeal carcinoma cancer cells that developed Erbitux (cetuximab) resistance in culture (PMID: 27196767).	27196767
TP53 mutant	hypopharynx cancer	predicted - sensitive	unspecified EGFR antibody + unspecified ERBB3 antibody	Preclinical - Cell culture	Actionable	In a preclinical study, combination of an unspecified EGFR antibody and an unspecified Erbb3 (Her3) antibody resulted in inhibition of survival in TP53 mutated hypopharyngeal carcinoma cancer cells that developed Erbitux (cetuximab) resistance in culture (PMID: 27196767).	27196767
TP53 mutant	hypopharynx cancer	resistant	unspecified EGFR antibody	Preclinical - Cell culture	Actionable	In a preclinical study, combination of two unspecified EGFR antibodies targeting nonoverlapping epitopes of Egfr did not inhibit proliferation of Tp53 mutated hypopharyngeal carcinoma cells that developed Erbitux (cetuximab) resistance in culture (PMID: 27196767).	27196767