PMID- 33678047 OWN - NLM STAT- MEDLINE DCOM- 20210830 LR - 20210830 IS - 1940-1574 (Electronic) IS - 0003-3197 (Linking) VI - 72 IP - 8 DP - 2021 Sep TI - The Effect of Platelet-Rich Plasma on Endothelial Progenitor Cell Functionality. PG - 776-786 LID - 10.1177/0003319721998895 [doi] AB - Platelets mediate circulating endothelial progenitor cell (EPC) recruitment and maturation, participating in vascular repair, however the underlying mechanism(s) remain unclear. We investigated the effect of platelet-rich plasma (PRP) on the functionality of CD34(+)-derived late-outgrowth endothelial cells (OECs) in culture. Confluent OECs were coincubated with PRP under platelet aggregation (with adenosine diphosphate; ADP) and nonaggregation conditions, in the presence/absence of the reversible P2Y12 platelet receptor antagonist ticagrelor. Outgrowth endothelial cell activation was evaluated by determining prostacyclin (PGI(2)) and monocyte chemoattractant protein-1 (MCP-1) release and intercellular adhesion molecule-1 (ICAM-1) membrane expression. Similar experiments were performed using human umbilical vein endothelial cells (HUVECs). Platelet-rich plasma increased ICAM-1 expression and PGI(2) and MCP-1 secretion compared with autologous platelet-poor plasma, whereas ADP-aggregated platelets in PRP did not exhibit any effect. Platelet-rich plasma pretreated with ticagrelor prior to activation with ADP increased all markers to a similar extent as PRP. Similar results were obtained using HUVECs. In conclusion, PRP induces OEC activation, a phenomenon not observed when platelets are aggregated with ADP. Platelet inhibition with ticagrelor restores the PRP capability to activate OECs. Since EPC activation is important for endothelial regeneration and angiogenesis, we suggest that agents inhibiting platelet aggregation, such as ticagrelor, may promote platelet-EPC interaction and EPC function. FAU - Sidiropoulou, Sofia AU - Sidiropoulou S AUID- ORCID: 0000-0001-8077-7087 AD - Atherothrombosis Research Centre/Laboratory of Biochemistry, Department of Chemistry, School of Sciences, University of Ioannina, Ioannina, Greece. FAU - Papadaki, Styliani AU - Papadaki S AD - Atherothrombosis Research Centre/Laboratory of Biochemistry, Department of Chemistry, School of Sciences, University of Ioannina, Ioannina, Greece. FAU - Tsouka, Aikaterini N AU - Tsouka AN AD - Atherothrombosis Research Centre/Laboratory of Biochemistry, Department of Chemistry, School of Sciences, University of Ioannina, Ioannina, Greece. FAU - Koutsaliaris, Ioannis K AU - Koutsaliaris IK AD - Atherothrombosis Research Centre/Laboratory of Biochemistry, Department of Chemistry, School of Sciences, University of Ioannina, Ioannina, Greece. FAU - Chantzichristos, Vasileios G AU - Chantzichristos VG AD - Atherothrombosis Research Centre/Laboratory of Biochemistry, Department of Chemistry, School of Sciences, University of Ioannina, Ioannina, Greece. FAU - Pantazi, Despoina AU - Pantazi D AUID- ORCID: 0000-0001-6636-5959 AD - Atherothrombosis Research Centre/Laboratory of Biochemistry, Department of Chemistry, School of Sciences, University of Ioannina, Ioannina, Greece. FAU - Paschopoulos, Minas E AU - Paschopoulos ME AD - Department of Obstetrics and Gynecology, School of Medicine, University of Ioannina, Ioannina, Greece. FAU - Hansson, Kenny M AU - Hansson KM AUID- ORCID: 0000-0003-0448-5140 AD - Bioscience Cardiovascular, Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden. FAU - Tselepis, Alexandros D AU - Tselepis AD AUID- ORCID: 0000-0002-5854-2385 AD - Atherothrombosis Research Centre/Laboratory of Biochemistry, Department of Chemistry, School of Sciences, University of Ioannina, Ioannina, Greece. LA - eng PT - Journal Article DEP - 20210308 PL - United States TA - Angiology JT - Angiology JID - 0203706 RN - 0 (Antigens, CD34) RN - 0 (Biomarkers) RN - 0 (CCL2 protein, human) RN - 0 (Chemokine CCL2) RN - 0 (ICAM1 protein, human) RN - 0 (Platelet Aggregation Inhibitors) RN - 126547-89-5 (Intercellular Adhesion Molecule-1) RN - DCR9Z582X0 (Epoprostenol) RN - GLH0314RVC (Ticagrelor) SB - IM MH - Antigens, CD34/metabolism MH - Biomarkers/metabolism MH - Blood Platelets/drug effects/*metabolism MH - *Cell Communication/drug effects MH - Cells, Cultured MH - Chemokine CCL2/metabolism MH - Endothelial Progenitor Cells/drug effects/*metabolism MH - Epoprostenol/metabolism MH - Human Umbilical Vein Endothelial Cells/drug effects/metabolism MH - Humans MH - Intercellular Adhesion Molecule-1/metabolism MH - Platelet Aggregation/drug effects MH - Platelet Aggregation Inhibitors/pharmacology MH - Platelet-Rich Plasma/drug effects/*metabolism MH - Ticagrelor/pharmacology OTO - NOTNLM OT - endothelial cell activation markers OT - endothelial progenitor cells OT - human umbilical vein endothelial cells OT - platelet-rich plasma OT - ticagrelor EDAT- 2021/03/09 06:00 MHDA- 2021/08/31 06:00 CRDT- 2021/03/08 05:29 PHST- 2021/03/09 06:00 [pubmed] PHST- 2021/08/31 06:00 [medline] PHST- 2021/03/08 05:29 [entrez] AID - 10.1177/0003319721998895 [doi] PST - ppublish SO - Angiology. 2021 Sep;72(8):776-786. doi: 10.1177/0003319721998895. Epub 2021 Mar 8.