FIGURE 6.

Effect of Δ⁹‐THCA‐A on knee joints of the hind limbs in CIA mice. (a) Representative hind paw images and joint sections with haematoxylin and eosin (H&E), safranin O, and toluidine blue staining (original magnification 40×). (b) Scoring of histological inflammation was determined using the criteria described in Section 2. (c) Cartilage damage was evaluated based on safranin O and toluidine blue staining according to the criteria described in Section 2. Data are presented as mean ± SEM; n = 9. ^* P < .05, significantly different as indicated