In line with in the tissues, the expression of lncRNA MIAT was also significantly increased in lung cancer cells compared with normal pulmonary epithelial cells BEAS-2B, and especially lncRNA MIAT was significantly increased in gefitinib-resistant PC9 (PC9/R) cells than in the parental cells (Figure 1F), indicating that upregulation of lncRNA MIAT may be involved in lung cancer drug resistance. The gene discussed is MIAT; the disease is lung cancer.