The expression level of tyrosine phosphorylation of NR2B in superficial spinal cord in each group. The L4-L5 spinal cords for analysis were collected at 48 h after the surgery. Proteins were extracted from the dorsal half of the L4-L5 spinal cord.(A) Representative western blot for tyrosine phosphorylation of NR2B (py-NR2B) in the superficial dorsal horn at the L4-L5 spinal cord; (B) quantification of NR2B tyrosine phosphorylation in each group. Data from five groups, each using six rats. Data are expressed as means ± SD.* P < 0.01 vs group C, # P < 0.01 vs group I, △
P < 0.01 vs group R.