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

Table 2 Average percentage of chondrocytes stained positive for transforming growth factor-beta1 antibody in platelet rich plasma and saline groups at each point of euthanasia

Time	Platelet rich plasma	Saline	P-value
3 wk	42 ± 19	12 ± 7	6.6 × 10-4
6 wk	30 ± 11	7 ± 8	3.1 × 10-4
12 wk	44 ± 19	21 ± 8	7.3 × 10-3