Fig. 6.

Immunostaining for collagen type II. Samples were stained at three and 6 months post-implantation in each group and shown in low and high magnification. Mo: month, A, D, G, J (FG + MenSCs group), note to noticeable expression of collagen type II indicated by brown color. B, E, H, K (FG group), the intensity of collagen type II expression was slight to moderate. C, F, I, L (control group), note to that the collagen II accumulation was less than compared to the native hyaline cartilage tissue. M, O PC, positive control (native hyaline cartilage). N, P NC, negative control