Combined (Acu and Sin) curative treatment affects SOD and MDA serum levels in collagen-induced arthritis. Combined curative treatment effects on (A) SOD and (B) MDA serum levels in collagen-induced arthritis. **P<0.01 vs. control group, #P<0.01 vs. arthritis model group, ##P<0.01 vs. arthritis model group. SOD, superoxide dismutase; MDA, malondialdehyde; Acu, acupuncture; Sin, sinomenine.