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

Table 1 Comparison of average percentage of chondrocytes positive for transforming growth factor-beta1 in plateletrich plasma vs saline in all regions of interest

Region of interest	Platelet rich plasma	Saline	P-value
Left	45 ± 36	15 ± 17	0.03
Center	30 ± 31	7 ± 12	0.05
Right	36 ± 24	11 ± 23	0.72
Unaltered	24 ± 25	11 ± 12	0.19
All ROIs	32 ± 31	15 ± 19	2.60 × 10-3

ROI: Selected regions of interest.

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