Une étude in vitro prouve la différence des effets sur le cartilage des PRP en fonction de leur concentration en plaquettes et en leucocytes :
Comparison of platelet-rich plasma formulations for cartilage healing: an in vitro study.
Platelet-rich plasma (PRP) has been advocated as one treatment for cartilage tissue regeneration. To date, several different platelet-rich formulations have been available, but a deep knowledge of their composition and mechanism of action in a specific clinical use is needed. The aim of this study was to investigate the effect of various PRP formulations on human chondrocytes in vitro.