Figure 6.

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