p70S6K siRNA alone had a relative smaller effect on tumor growth (inhibition rate 13.06%; Table 1), rapamycin significantly inhibited the growth of xenografts, and the inhibition rate reached 70.35% (P < 0.05), while rapamycin combined with p70S6K siRNA had the strongest inhibitory effect (inhibition rate: 96.49%; P < 0.001), and the tumor growth nearly stopped (Figures 5(a) and 5(b)). This evidence concerns the gene RPS6KB1 and neoplasm.