Figure 4From: The long non-coding RNA, GAS5, enhances gefitinib-induced cell death in innate EGFR tyrosine kinase inhibitor-resistant lung adenocarcinoma cells with wide-type EGFR via downregulation of the IGF-1R expressionA colony-forming growth assay was performed to determine the proliferation of pCDNA-GAS5- or empty vector-transfected A549 cells plus gefitinib. The colonies were counted and captured. (A) Representative colony formation assay results of four groups. (B) GAS5 and gefitinib together synergistically suppress colony formation. The data represent the mean ± SD from three independent experiments. **P < 0.01Back to article page