HOXB9 and central nervous system cancer: WB analysis revealed that, compared with those in normal glial cells, the contents of EGR1 and HOXB9 in glioma cells obviously increased (0.690 ± 0.024 vs. 0.124 ± 0.008, 0.719 ± 0.007 vs. 0.114 ± 0.015; *p < 0.05; Figure 3A,B).