The treatment of JJ012 cells with NGF (100 ng/mL) significantly reduced miR-423-5p expression (Figure 5B) and at the concentrations of 30, 50 or 100 ng/mL, significantly inhibited the miR-423-5p synthesis in both chondrosarcoma cell lines in a concentration-dependent manner (Figure 5C). The gene discussed is NGF; the disease is chondrosarcoma.