Effect of thymoquinoneon inflammatory responses in SCI rats. Activity levels of (A) TNF-α, (B) IL-1β, (C) IL-6 and (D) IL-18 were measured using ELISA kits. ##P<0.01 vs. Sham; **P<0.01 vs. Model. SCI, spinal cord injury; Sham, sham surgery group; Model, SCI surgery group; Thymoquinone, SCI + thymoquinone group; TNF, tumor necrosis factor; IL, interleukin.