In the injured side of the DRG, pain-related signals including BDNF, COX2, and c-Myc were highly expressed in the control group after peripheral nerve injury, with percentages of 29.98% ​± ​3.79%, 26.75% ​± ​8.04%, and 22.94% ​± ​3.25%, respectively. The gene discussed is BDNF; the disease is peripheral nerve injury.