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• W2784723408 abstract "The HER family of proteins (EGFR, HER2, HER3 and HER4) have long been thought to be therapeutic targets for bladder cancer, but previous clinical trials targeting these proteins have been disappointing. Second generation agents may be more effective.The aim of this study was to evaluate responses to two second-generation irreversible tyrosine kinase inhibitors, dacomitinib and afatinib, in bladder cancer cell lines.Cell lines were characterized by targeted next generation DNA sequencing, RNA sequencing, western blotting and flow cytometry. Cell survival responses to dacomitinib or afatinib were determined using (3-[4,5-dimethylthioazol-2-yl]-2,5-diphenyl tetrazolium bromide) (MTT) or [3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) and phenazine methosylfate (PMS) cell survival assays.Only two cell lines of 12 tested were sensitive to afatinib. Sensitivity to afatinib was significantly associated with mutation in either HER2 or HER3 (p < 0.05). The two cell lines sensitive to afatinib were also responsive to dacomitinib ralong with an additional 4 other cell lines out of 16 tested. No characteristic was associated with dacomitinib sensitivity. Molecular profiling demonstrated that only two genes were high in both afatinib and dacomitinib sensitive cells. Further rhigher expression of RAS pathway genes was noted for dacomitinib responsive cells.This study confirms that cell line screening can be useful in pre-clinical evaluation of targeted small molecule inhibitors and suggests that compounds with similar structure(s) and target(s) may have distinct sensitivity profiles. Further rcombinational targeting of additional molecularly relevant pathways may be important in enhancing responses to HER targeted agents in bladder cancer." @default.
• W2784723408 created "2018-02-02" @default.
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• W2784723408 date "2018-01-20" @default.
• W2784723408 modified "2023-09-26" @default.
• W2784723408 title "Molecular Correlates of In Vitro Responses to Dacomitinib and Afatinib in Bladder Cancer" @default.
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• W2784723408 doi "https://doi.org/10.3233/blc-170144" @default.
• W2784723408 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5798519" @default.
• W2784723408 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29430509" @default.
• W2784723408 hasPublicationYear "2018" @default.
• W2784723408 type Work @default.

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