Figure 3

Effects of triptolide on the expression of TNF-α in paw cartilage in the CIA group. Paraffin sections of the joints were collected and subjected to immunohistochemical staining. TNF-α positive cells were stained in brown (hematoxylin counterstain). Data are represented as the mean ± SD (*P < 0.001 vs. control group; ##P < 0.01 vs. CIA group). (× 400).