When we explored the roles of dysregulated miR-19 in lung cancer, microarray-based gene expression data unexpectedly demonstrated a significant number of inflammatory and immune response genes up- or down-regulated by miR-19, including interferon(IFN)-stimulated genes such as GBP1, IFRD1, IFI35, IFI6 and PSMB9, and complement components, suggesting a strong relationship between miR-19 and inflammation in cancer. This evidence concerns the gene PSMB9 and cancer.