Plantar incision increases the surface delivery of AMPA receptor subunit GluR1, but not GluR2, in the dorsal horn. (A) Representative Western blots and quantitative analysis of band density show GluR1 and GluR2 protein levels in the plasma membrane fraction of ipsilateral dorsal horn in rats at 3 h, 1 day, and 3 days after plantar incision. β-tubulin was used as an internal reference. (B) Representative Western blots and quantitative analysis of GluR1 and GluR2 protein levels in the cytosolic fraction of different groups. *P < 0.05, **P < 0.01 compared with the control group. n = 6 rats per time point. Ctrl = control group (naïve).