Only the mRNAs level of MGH24, H125 and RVH6849 showed overexpression while other 7 NSCLC cell lines lowered or lacked the expression of TTF-1 mRNA, which was consistent with the previous reports on TTF-1 expression in lung cancer cell lines (15) (Fig. 1). Here, TTF1 is linked to non-small cell lung carcinoma.