PMID- 9228712 OWN - NLM STAT- MEDLINE DCOM- 19970912 LR - 20190819 IS - 0042-9007 (Print) IS - 0042-9007 (Linking) VI - 72 IP - 4 DP - 1997 TI - Prolonged holding of whole blood at 22 degrees C does not increase activation in platelet concentrates. PG - 225-8 AB - OBJECTIVES: Platelets prepared after holding of whole blood overnight at 22 degrees C have a well-preserved metabolism. However, the possibility that such prolonged incubation with active granulocytes may increase platelet activation has not been fully tested. METHODS: We investigated this possibility by flow cytometric analysis of membrane glycoproteins (GPs) Ib and IIb/IIIa and the activation markers CD62P and CD63 in platelet concentrates (PCs) prepared from whole blood that was held for either 6 h without cooling plates (n = 20) or for 24 h on cooling plates of 1,4-butanediol (n = 20). PCs were prepared by the platelet-rich plasma method and analyzed on the second storage day. RESULTS: Platelet yield and aggregation response to ristocetin, collagen and epinephrine + ADP were similar in both types of PCs, as was the mean fluorescence intensity for GPs Ib and IIb/IIIa. PCs prepared by the overnight-hold method did not differ from those obtained 6 h after collection in the percentage of platelets expressing CD62P (12.3 +/- 6.2% vs. 14.1 +/- 4.0%; p > 0.1) or CD63 (9.8 +/- 6.4% vs. 8.8 +/- 3.6%; p > 0.1). CONCLUSION: Prolonged holding of whole blood at 22 degrees C prior to component preparation does not increase the level of platelet activation. FAU - Sanz, C AU - Sanz C AD - Service of Hemotherapy and Hemostasis, Hospital Clinico, Barcelona, Spain. FAU - Pereira, A AU - Pereira A FAU - Faundez, A I AU - Faundez AI FAU - Ordinas, A AU - Ordinas A LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Vox Sang JT - Vox sanguinis JID - 0413606 RN - 0 (Antigens, CD) RN - 0 (Biomarkers) RN - 0 (CD63 protein, human) RN - 0 (P-Selectin) RN - 0 (Platelet Membrane Glycoproteins) RN - 0 (Tetraspanin 30) RN - 1404-55-3 (Ristocetin) RN - 61D2G4IYVH (Adenosine Diphosphate) RN - 9007-34-5 (Collagen) RN - YKH834O4BH (Epinephrine) SB - IM MH - Adenosine Diphosphate/pharmacology MH - Antigens, CD/analysis MH - Biomarkers MH - Blood Preservation/*methods MH - Collagen/pharmacology MH - Epinephrine/pharmacology MH - Flow Cytometry MH - Granulocytes/physiology MH - Humans MH - P-Selectin/blood MH - *Platelet Activation MH - Platelet Aggregation/drug effects MH - Platelet Membrane Glycoproteins/analysis MH - Ristocetin/pharmacology MH - Temperature MH - Tetraspanin 30 MH - Time Factors EDAT- 1997/01/01 00:00 MHDA- 1997/01/01 00:01 CRDT- 1997/01/01 00:00 PHST- 1997/01/01 00:00 [pubmed] PHST- 1997/01/01 00:01 [medline] PHST- 1997/01/01 00:00 [entrez] AID - 10.1046/j.1423-0410.1997.7240225.x [doi] PST - ppublish SO - Vox Sang. 1997;72(4):225-8. doi: 10.1046/j.1423-0410.1997.7240225.x.