Platelet-rich plasma increases transforming growth factor-beta1 expression at graft-host interface following autologous osteochondral transplantation in a rabbit model

Figure 4 Sagittal sections of an osteochondral graft treated with saline 12 wk following surgery (400 ×). Transforming growth factor-beta1 antibody staining is positive in cells that appear brown. A: Left interface between the graft and host cartilage; B: Central aspect of the graft; C: Right interface between the graft and host cartilage.