title: Effect of centrifugation time on growth factor and MMP release of an experimental platelet-rich fibrin-type product.
abstract: Platelet-rich fibrin (PRF) has a controlled release of growth factors due to the fibrin matrix structure. Different centrifugation protocols were suggested for PRF preparation. Since the derivation method of PRF can alter its contents, in the present study it is aimed to investigate the cell contents and transforming growth factor beta-1 (TGF-β1), platelet-derived growth factor (PDGF-AB), vascular endothelial growth factor (VEGF), matrix metalloproteinase (MMP)-1 and-8 release from experimental PRF-type membranes obtained with different centrifugation times at 400 gravity. Three blood samples were collected from 20 healthy non-smoker volunteers. One tube was used for whole blood analyses. The other two tubes were centrifuged at 400 g for 10 minutes (group A) or 12 minutes (group B). Each experimental PRF-type membrane was placed in Dulbecco's Modified Eagle's Medium (DMEM)and at 1, 24 and 72 hours, TGF-β1, PDGF-AB, VEGF, MMP-1 and -8 release amounts were analysed by enzyme-linked immunosorbent assay (ELISA). The blood cell count of membranes was determined by subtracting plasma supernatant and red blood cell (RBC) mixture from the whole blood cell counts. At 72 hours, the VEGF level of group B was statistically higher than that of group A (p = 0.040). The centrifugation time was not found to influence the release of other growth factors, enzymes and cell counts. Within the limits of the present study, it might be suggested that centrifugation time at a constant gravity has a significant effect on the VEGF levels released from experimental PRF-type membrane. It can be concluded that due to the importance of VEGF in the tissue healing process, membranes obtained at 12-minute centrifugation time may show a superior potential in wound healing.
authors.affiliation: a Department of Periodontology , Ege University School of Dentistry , İzmir , Turkey.
authors.forename: Gülnihal
authors.initials: G
authors.lastname: Eren
authors.affiliation: a Department of Periodontology , Ege University School of Dentistry , İzmir , Turkey.
authors.forename: Ali
authors.initials: A
authors.lastname: Gürkan
authors.affiliation: b Department of Biology , Celal Bayar University, School of Science , Manisa , Turkey.
authors.forename: Harika
authors.initials: H
authors.lastname: Atmaca
authors.affiliation: c Department of Hematology , Ege University, Medical School , Izmir , Turkey.
authors.forename: Ayhan
authors.initials: A
authors.lastname: Dönmez
authors.affiliation: a Department of Periodontology , Ege University School of Dentistry , İzmir , Turkey.
authors.forename: Gül
authors.initials: G
authors.lastname: Atilla
mesh_terms: D000328:Adult; D015415:Biomarkers; D001772:Blood Cell Count; D001792:Blood Platelets / Q000378:metabolism*; D016022:Case-Control Studies; D002498:Centrifugation; D005260:Female; D005337:Fibrin; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins / Q000378:metabolism*; D008297:Male; D020782:Matrix Metalloproteinases / Q000378:metabolism*; D010510:Periodontal Diseases / Q000097:blood; D053657:Platelet-Rich Plasma; D055815:Young Adult
chemical_list: D015415:Biomarkers; D036341:Intercellular Signaling Peptides and Proteins; D005337:Fibrin; D020782:Matrix Metalloproteinases
keywords: Growth factor; in vitro study; matrix metalloproteinase; platelet-rich fibrin