Effects of ECN (10 mg/kg, i.p.) on the oxidative stress markers in the spinal cord and sciatic nerve tissue using qtRT-PCR. (A) ECN (10 mg/kg, i.p.) treatment significantly enhanced the mRNA expression levels of Nrf2 in the sciatic nerve and spinal cord tissue on day 7 post-PSNL surgery. (B) ECN (10 mg/kg, i.p) treatment significantly enhanced the mRNA expression levels of Nrf2 in sciatic nerve and spinal cord tissue on day 14 post-PSNL surgery. (C) ECN (10 mg/kg, i.p) treatment significantly enhanced the mRNA expression levels of HO-1 in sciatic nerve and spinal cord tissue on day 7 post-PSNL surgery. (D) ECN (10 mg/kg, i.p) treatment significantly enhanced the mRNA expression levels of HO-1 in the sciatic nerve and spinal cord tissue on day 14 post-PSNL surgery. (E) ECN (10 mg/kg, i.p) treatment significantly enhanced the mRNA expression levels of NQO1 in sciatic nerve and spinal cord tissue on day 7 post-PSNL surgery. (F) ECN (10 mg/kg, i.p.) treatment significantly enhanced the mRNA expression levels of NQO1 in sciatic nerve and spinal cord tissue on day 14 post-PSNL surgery. The data is presented as the mean (n = 3) ± S.D. Different letters meant statistically significant differences: (***) p < 0.001 indicate significant differences from the PSNL control group. (###) indicate significant differences from the normal control group. *** p < 0.001 (two-way ANOVA followed by Dunnett’s test).