Studies have shown that the decrease of the expression level of FLOT2 protein mediated by siRNA can obviously inhibit the activity of Src tyrosine kinase, thus slowing down the epithelial-mesenchymal transition (EMT) process of human nasopharyngeal carcinoma cell line induced by TGF-β [12]. The gene discussed is FLOT2; the disease is nasopharyngeal carcinoma.