Effect of DHA on neurite outgrowth. Neurite process length and number of branches were significantly reduced in H2O2-injured cultures (A,B,C), compared with control DRG cells (A,B,C). Total outgrowth, length of longest neurite and number of branches were all markedly increased in the DRG cells treated with DHA (A,B,C). Data are mean ± SEM of ten mice for each group. ***P < 0.001 vs Ctr; ### P < 0.005 vs H2O2; ** P < 0.01 vs Ctr; # P < 0,05 vs H2O2.