To further investigate the role of Linc00668 in NSCLC cells, we constructed a Linc00668 overexpression vector using pIRES2-EGFP, and after transfection of p-Linc00668 into NCI-H1299 and A549 cells, the expression level of Linc00668 was significantly elevated (Fig. 2f). The gene discussed is LINC00668; the disease is non-small cell lung carcinoma.