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- W2059574458 abstract "Abstract The epidermal growth factor receptor tyrosine kinase inhibitors (EGFR TKIs) such as gefitinib and erlotinib have been widely used in treating patients with advanced non‐small cell lung cancer (NSCLC). However, acquired resistance to EGFR TKI almost occurs in every patient eventually. To identify its potential mechanism, we established a human NSCLC cell line PC9/AB2 which was 576‐fold decrease in gefitinib sensitivity compared with its parental PC9 cell lines. No EGFR‐T790M mutation or abnormal expression of c‐Met protein was found in PC9/AB2 cells. Over‐expression of integrin β1 was found, accompanied with increase of the cells' adhesion and migration. To further confirm the role of integrin β1 in gefitinib acquired resistance, we transferred its siRNA‐expressing plasmid and its whole cDNA expressing plasmid into PC9/AB2 and into PC9 cells, respectively. The sensitivity of NSCLC cells to gefitinib was negatively correlated with integrin β1 expression levels. All these data suggest that up‐regulation of integrin β1 might be an important factor for gefitinib resistance in NSCLC cell line PC9/AB2. J. Cell. Biochem. 111: 1565–1574, 2010. © 2010 Wiley‐Liss, Inc." @default.
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- W2059574458 date "2010-11-29" @default.
- W2059574458 modified "2023-10-10" @default.
- W2059574458 title "Integrin beta1 over-expression associates with resistance to tyrosine kinase inhibitor gefitinib in non-small cell lung cancer" @default.
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- W2059574458 doi "https://doi.org/10.1002/jcb.22888" @default.
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