The 786-O cells with IRF9 suppression produced much larger tumors than the control cells (Figure 7C and D). Knockdown of IRF9 in Ren-02 cells also significantly boosted tumor growth in a xenograft model (Figure 7—figure supplement 1), IRF9 suppression did not reduce the expression of other subunits of ISGF3 (Figure 7—figure supplement 2A), and IRF9 suppression was maintained in the endpoint tumors (Figure 7—figure supplement 2B). This evidence concerns the gene STAT1 and neoplasm.