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- W4362493908 abstract "<div>Abstract<p>Activation of FGFR signaling through mutations, amplifications, or fusions involving <i>FGFR1, 2, 3</i>, or <i>4</i> is seen in multiple tumors, including lung, bladder, and cholangiocarcinoma. Currently, several clinical trials are evaluating the role of novel FGFR inhibitors in solid tumors. As we move forward with FGFR inhibitors clinically, we anticipate the emergence of resistance with treatment. Consequently, we sought to study the mechanism(s) of acquired resistance to FGFR inhibitors using annotated cancer cell lines. We identified cancer cell lines that have activating mutations in <i>FGFR1, 2</i>, or <i>3</i> and treated them chronically with the selective FGFR inhibitor, BGJ398. We observed resistance to chronic BGJ398 exposure in DMS114 (small-cell lung cancer, <i>FGFR1</i> amplification) and RT112 (urothelial carcinoma, <i>FGFR3</i> fusion/amplification) cell lines based on viability assays. Reverse-phase protein array (RPPA) analysis showed increased phosphorylation of Akt (T308 and S473) and its downstream target GSK3 (S9 and S21) in both the resistant cell lines when compared with matching controls. Results of RPPA were confirmed using immunoblots. Consequently, the addition of an Akt inhibitor (GSK2141795) or siRNA was able to restore sensitivity to BGJ398 in resistant cell lines. These data suggest a role for Akt pathway in mediating acquired resistance to FGFR inhibition. <i>Mol Cancer Ther; 16(4); 614–24. ©2017 AACR</i>.</p></div>" @default.
- W4362493908 created "2023-04-05" @default.
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- W4362493908 date "2023-04-03" @default.
- W4362493908 modified "2023-10-18" @default.
- W4362493908 title "Data from Akt Activation Mediates Acquired Resistance to Fibroblast Growth Factor Receptor Inhibitor BGJ398" @default.
- W4362493908 doi "https://doi.org/10.1158/1535-7163.c.6538800.v1" @default.
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