[Improvement of Preparation Method of Rats Platelet-Rich Plasma and Quality Detection]

To optimize the single centrifugation preparation protocol of rat platelet-rich plasma (PRP).

The arterial blood of rats obtained by carotid artery intubation was collected by heparin sodium anticoagulant tubes, and then the blood divided into sterile EP tubes, adjusting the red blood cell concentration with normal saline, while rat PRP was prepared by centrifugation under different conditions (the centrifugal force was 200×g-240×g, and the centrifugal time was 8-12 min). Subsequently, the blood cell count and quality evaluation of anticoagulat whole blood and PRP were performed by hematology analyzer and flow cytometry, respectively, and the differences between different groups were compared.

The red blood cell concentration to (5.5-6.5)×10¹²/L after anticoagulation of rat whole blood was good for PRP extraction. When the blood samples was centrifuged at 220×g for 10 min, the platelet recovery rate was the highest［(53.52±0.63)%］. The level of apoptosis and activation of plateles in PRP were not significantly different compared to whole blood(P>0.05), and the release level of growth factor was significantly increased(P<0.05).

It is a key to improve the PRP extraction efficiency by reducing the amount of mixed red blood cell, and this study successfully modified the preparation method of rat PRP, with platelets high recovery rate and stable quality.