Background
Platelet-rich plasma (PRP) contains pro-angiogenic growth factors including vascular endothelial growth factor (VEGF). Angiogenesis is a necessary component of wound healing in instances of diabetic foot ulcers (DFU). PRP composition varies depending on
Conclusions
PRP from diabetic donors had higher VEGF content making autologous PRP application a promising treatment for DFU. However, this should be investigated another appropriate clinical trial.
Methods
PRP was prepared using 24 mL of whole blood from 13 diabetic and 10 non-diabetic patients registered at Klinik Hayandra. Whole blood in sodium citrate tubes were centrifuged at 1,000 rpm for 5 minutes followed by plasma separation. Plasma samples were centrifuged at 3,000 rpm for 5 minutes. Upper platelet-poor plasma layers were discarded, leaving 5 mL of concentrated platelet containing plasma (PRP). Concentrated plasma samples were mixed, aliquoted, stored at -86 °C, and pooled for platelet count, VEGF, and total protein analyses. Platelet counting was also performed using fresh whole blood and PRP to measure changes following PRP preparation.
Results
Diabetic donors had higher whole blood platelet counts than non-diabetic donors, but this difference was not statistically significant. An average increase of more than 250% in platelet number after PRP preparation using our method was noted in both groups. Freezing-thawing samples at -86 °C lysed more than 90% of PRP platelets regardless of diabetes status. Diabetic PRP had lower mean total protein and higher VEGF concentrations. Lysed platelets from diabetic donors released more VEGF than those from non-diabetic donors. Conclusions: PRP from diabetic donors had higher VEGF content making autologous PRP application a promising treatment for DFU. However, this should be investigated another appropriate clinical trial.