Changes in platelet morphology and function during 24 hours of storage

作者: S. Braune , M. Walter , F. Schulze , A. Lendlein , F. Jung

DOI: 10.3233/CH-141876

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摘要: Abstract For in vitro studies assessing the interaction of platelets with implant materials, common and standardized protocols for preparation platelet rich plasma (PRP) are lacking, which may lead to non-matching results due diversity applied protocols. Particularly, aging during prolonged storage times is discussed an underestimation material thrombogenicity. Here, we study influence whole blood- PRP-storage on changes morphology function. Blood from apparently healthy subjects was collected according a protocol examined immediately after blood collection, four hours twenty later. The capability adhere form stable aggregates (PFA100, closure time) sodium citrate anticoagulated (WB) using agonists equine type I collagen epinephrine bitartrate (collagen/epinephrine) as well adenosine-5'-diphosphate (collagen/ADP). Circulating were quantified at each time point. Morphology visualized microscopically measured electric field multi-channel counting system (CASY). percentage activated assessed by means P-selectin (CD62P) expression circulating platelets. Furthermore, factor 4 (PF4) release poor (PPP) Whole PFA100 increased stimulation collagen/ADP collagen/epinephrine. Twenty both parameters pathologically above upper limit reference range. Numbers platelets, PRP, decreased hours, but no longer hours. Mean volumes (MPV) large cell ratios (P-LCR, 12 fL - 40 fL) over time. Immediately debris or could be microscopically. After first very small occurred. 24 also progressively increased. In accordance this, CASY revealed increase (up 90 μm diameter) increasing CD62P positive PF4 significantly resting PRP. When soluble ADP added stored PRP samples, number activatable present reveals importance consequent standardization WB Platelet function, particularly reactivity adherent their surrounding milieu, changed rapidly outside vascular system. This knowledge crucial interest, biomaterial development cardiovascular applications, help define standards hemocompatibility testing biomaterials.

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