PZ was expressed in three NSCLC cell lines (A549, H1299, H1975) in this study, which is in agreement with previous observations that PZ is expressed in various tumor tissues [16,17], including breast cancer [18,19], lung cancer [20], colon cancer, gastric cancer [21,22], and others [16,17]. The gene discussed is PROZ; the disease is non-small cell lung carcinoma.