To determine whether miR-184 and miR-574-5p increase or decrease SCLC metastasis through a combination of their predicted genes' 3′UTRs, we cloned the 3′UTRs of EPAS1 and PTPRU downstream of the luciferase gene in 293T cells as a reporter assay. The gene discussed is PTPRU; the disease is small cell lung carcinoma.