RACK1 and central nervous system cancer: The results demonstrated that knockdown of RACK1 led to a dramatic accumulation of cells in G0/G1 phase (* p < 0.05 for U87; * p < 0.05 for U251), while obviously reduced their proportions at the S phase in comparison with NC groups both in U87 and U251 cells (Figure 4A,B), implying the potential acceleration of the cell cycle for glioma by high RACK1 levels.