Expression of spinal MAPKs after electroacupuncture (EA) treatment in formalin rats.

<p>EA was applied to ST 36 and GB 34 for 30 min before the formalin injection. A shows the representative bands; the density of p-ERK and ERK (B); p-JNK and JNK (C); and p-p38 MAPK and p38 MAPK (D) levels were normalized to β-actin levels and expressed as a fold increase. Data are presented as the mean ± S.E.M. (n = 4 for each group). * p < 0.05, ** p < 0.01.