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Platelet Rich Blood

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https://www.readbyqxmd.com/read/28545565/the-combination-of-nano-calcium-sulfate-platelet-rich-plasma-gel-scaffold-with-bmp2-gene-modified-mesenchymal-stem-cells-promotes-bone-regeneration-in-rat-critical-sized-calvarial-defects
#1
Zunpeng Liu, Xue Yuan, Gabriela Fernandes, Rosemary Dziak, Ciprian N Ionita, Chunyi Li, Changdong Wang, Shuying Yang
BACKGROUND: Mesenchymal stem cells (MSCs) can be differentiated into an osteoblastic lineage in the presence of growth factors (GFs). Platelet-rich plasma (PRP), which can be easily isolated from whole blood, contains a large amount of GFs, and, therefore, promotes bone growth and regeneration. The main goal of this work was to develop and investigate the effect of a new sandwich-like bone scaffold which combines a nano-calcium sulfate (nCS) disc along with PRP fibrin gel (nCS/PRP) with BMP2-modified MSCs on bone repair and regeneration in rat critical-sized calvarial defects...
May 25, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28535035/fabrication-of-anti-biofouling-plasma-filtration-membrane-by-electrospinning-process-using-photo-crosslinkable-zwitterionic-phospholipid-polymers
#2
Jiae Seo, Ji-Hun Seo
The goal of this study is to fabricate a stable plasma filtration membrane with anti-biofouling properties via an electrospinning process. To this end, a random-type copolymer consisting of zwitterionic phosphorylcholine (PC) groups and ultraviolet (UV)-crosslinkable phenyl azide groups was synthesized. The zwitterionic PC group provides anti-biofouling properties, and the phenyl azide group enables the stable maintenance of the fibrous nanostructure of hydrophilic zwitterion polymers in aqueous medium via a simple UV curing process...
May 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28529414/comparison-of-efficacy-of-autologous-platelet-rich-fibrin-versus-saline-dressing-in-chronic-venous-leg-ulcers-a-randomised-controlled-trial
#3
Anirudh Somani, Reena Rai
BACKGROUND: Venous leg ulcer is a chronic condition, and various treatment modalities are available. Platelet-rich fibrin (PRF) is one of the newer modalities and it contains fibroblast growth factor (GF), vascular endothelial GF, angiopoitin and platelet-derived GF which enhances the wound healing. Hence, we conducted a randomised controlled trial to compare the efficacy of PRF versus saline dressing in chronic venous leg ulcers. AIM: This study aims to compare the efficacy of autologous PRF with saline dressing in patients with chronic venous leg ulcer and to compare the mean reduction in ulcer area at the end of 4 weeks...
January 2017: Journal of Cutaneous and Aesthetic Surgery
https://www.readbyqxmd.com/read/28521997/biodegradable-collagen-sponge-reinforced-with-chitosan-calcium-pyrophosphate-nanoflowers-for-rapid-hemostasis
#4
Tingsheng Yan, Feng Cheng, Xinjing Wei, Yudong Huang, Jinmei He
Efficient and biodegradable hemostatic materials become increasingly important in civilian and military clinical. However, traditional hemostatic materials are difficult to achieve expected effects especially in parenchymal organs with rich vascularity. In facing these challenges, we designed a biodegradable collagen sponge reinforced with chitosan/calcium pyrophosphate nanoflowers (CPNFs-Col sponge) for rapid hemostasis. With specific performances, such as rapid water absorption ability, the positive surface rich in amino groups and high specific surface area (952...
August 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28509340/prf-based-matrices-to-improve-angiogenesis-in-an-in-vitro-co-culture-model-for-bone-tissue-engineering
#5
Eva Dohle, Karima El Bagdadi, Robert Sader, Joseph Choukroun, C James Kirkpatrick, Shahram Ghanaati
In the context of prevascularization strategies for tissue engineering purposes, co-culture systems consisting of outgrowth endothelial cells (OECs) and primary osteoblasts (pOBs) have been established as a promising in vitro tool to study regeneration mechanisms and to identify factors that might positively influence repair processes like wound healing or angiogenesis. The development of autologous injectable platelet rich fibrin (PRF), which can be generated from peripheral blood in a minimal invasive procedure, fulfils several requirements for clinically applicable cell-based tissue engineering strategies...
May 16, 2017: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/28505525/thrombin-generation-and-intracranial-atherosclerotic-disease-in-patients-with-a-transient-ischaemic-attack
#6
Elisabetta Favaretto, Michelangelo Sartori, Cristina Legnani, Francesca Rondelli, Michela Cini, Maria Guarino, Benilde Cosmi
BACKGROUND: Intracranial atherosclerotic disease (ICAD) is responsible for at least 10% of transient ischaemic attacks (TIA). Thrombin generation has been shown to be associated with several atherosclerotic conditions and may be relevant in the pathogenesis of TIA from ICAD. OBJECTIVE: To evaluate the association between thrombin generation and ICAD in patients with TIA. MATERIALS AND METHODS: Consecutive patients with confirmed diagnosis of TIA by vascular neurologist were enrolled...
May 9, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28498077/the-effect-of-platelet-rich-fibrin-membrane-on-the-repair-of-perforated-tympanic-membrane-an-experimental-study
#7
Nuray Ensari, Özer Erdem Gür, Mehmet Türker Öztürk, Dinç Süren, Ömer Tarık Selçuk, Üstün Osma
CONCLUSION: Platelet-rich fibrin (PRF) membrane could be used successfully in the repair of tympanic membrane perforation and wound healing. OBJECTIVES: To evaluate the effect of platelet-rich fibrin membrane in the repair of perforated tympanic membrane. METHODS: After otoscopic examination, a 3-mm perforation was made in the posterior quadrant of both tympanic membranes of 50 adult male Sprague-Dawley rats. Venous blood was withdrawn from the rats, then centrifuged...
February 22, 2017: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/28488110/platelets-as-crucial-partners-for-tumor-metastasis-from-mechanistic-aspects-to-pharmacological-targeting
#8
REVIEW
Annalisa Contursi, Angela Sacco, Rosalia Grande, Melania Dovizio, Paola Patrignani
Platelets are anucleated cells that circulate in the blood as sentinels of tissue integrity. In fact, they are rich in a plethora of proteins and other factors stored in different granules which they selectively release upon stimulation. Moreover, platelets synthesize a vast number of lipids and release various types of vesicles, including exosomes which are rich in genetic material. Platelets possess a central function to interact with other cell types, including inflammatory cells and cancer cells. Recent findings have enlightened the capacity of platelets to induce changes in the phenotype of cancer cells which acquire invasiveness thus enhancing their metastatic potential...
May 9, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28487393/potent-thrombolytic-effect-of-n-acetylcysteine-on-arterial-thrombi
#9
Sara Martinez de Lizarrondo, Clément Gakuba, Bradley A Herbig, Yohann Repessé, Carine Ali, Cécile V Denis, Peter Lenting, Emmanuel Touzé, Scott L Diamond, Denis Vivien, Maxime Gauberti
Background -Platelet crosslinking during arterial thrombosis involves von Willebrand Factor (VWF) multimers. Therefore, proteolysis of VWF appears promising to disaggregate platelet-rich thrombi and restore vessel patency in acute thrombotic disorders such as ischemic stroke, acute coronary syndrome or acute limb ischemia. N-Acetylcysteine (NAC, a clinically approved mucolytic drug) can reduce intrachain disulfide bonds in large polymeric proteins. In the present study, we postulated that NAC might cleave the VWF multimers inside occlusive thrombi, thereby leading to their dissolution and arterial recanalization...
May 9, 2017: Circulation
https://www.readbyqxmd.com/read/28472104/prediction-of-bleeding-risk-in-patients-taking-vitamin-k-antagonists-using-thrombin-generation-testing
#10
Saartje Bloemen, Suzanne Zwaveling, Hugo Ten Cate, Arina Ten Cate-Hoek, Bas de Laat
Until recently, vitamin K antagonists (VKAs) were the mainstay of oral anticoagulant treatment with bleeding as the most prevalent adverse effect. One to four percent of patients experience major bleeding episodes, while clinically relevant bleeding occurs in up to 20%. At this moment no laboratory assays are available to identify patients at risk for bleeding. With this study we aimed to investigate whether thrombin generation tests might identify a bleeding risk in patients taking VKAs. This prospective cohort study included 129 patients taking VKAs for more than three months...
2017: PloS One
https://www.readbyqxmd.com/read/28470911/platelet-rich-plasma-for-chronic-synovitis-treatment-in-patients-with-haemophilia
#11
H Caviglia, M E Landro, C Daffunchio, G Galatro, A L Douglas Price, P Salgado, D Neme
INTRODUCTION: Haemophilic synovitis is caused by chronic accumulation of blood in the joint. Conservative treatment is insufficient to solve this pathology. Platelet-rich plasma (PRP) has a high concentration of growth factors (GFs) that play a key role in regulation and stimulation of healing processes. The aim of this study was to describe the effect of PRP injection in chronic synovitis of the joints in patients with haemophilia (PWH). PATIENTS AND METHODS: Nineteen patients with 28 joints were treated at our centre in Buenos Aires, Argentina between December 2014 and December 2015...
May 4, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28467589/a-comparison-of-the-effects-of-platelet-rich-plasma-and-demineralized-bone-matrix-on-critical-bone-defects-an-experimental-study-on-rats
#12
Egemen Turhan, Mustafa Kemal Akça, Ahmet Bayar, Murat Songür, Selçuk Keser, Mahmut Nedim Doral
BACKGROUND: Delayed union of fractured bone is one of the main problems of orthopedics and traumatology practice. It was hypothesized that the beneficial effects of allogeneic platelet-rich plasma (PRP) would be valuable in the treatment of segmental bone defects. This study is a comparison of the effects of demineralized bone matrix (DBM) and PRP in a segmental bone defect model. METHODS: Total of 48 Wistar albino rats were separated into 4 groups. Segmental bone defect was created at right radius diaphysis in all specimens using dorsal approach...
March 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/28466544/comparison-of-bacterial-attachment-to-platelet-bags-with-and-without-preconditioning-with-plasma
#13
M Loza-Correa, M Kalab, Q-L Yi, L J Eltringham-Smith, W P Sheffield, S Ramirez-Arcos
BACKGROUND AND OBJECTIVES: Canadian Blood Services produces apheresis and buffy coat pooled platelet concentrates (PCs) stored in bags produced by two different manufacturers (A and B, respectively), both made of polyvinyl chloride-butyryl trihexyl citrate. This study was aimed at comparing Staphylococcus epidermidis adhesion to the inner surface of both bag types in the presence or absence of plasma factors. MATERIALS AND METHODS: Sets (N = 2-6) of bags type A and B were left non-coated (control) or preconditioned with platelet-rich, platelet-poor or defibrinated plasma (PRP, PPP and DefibPPP, respectively)...
May 3, 2017: Vox Sanguinis
https://www.readbyqxmd.com/read/28466249/mechanical-and-degradation-properties-of-advanced-platelet-rich-fibrin-a-prf-concentrated-growth-factors-cgf-and-platelet-poor-plasma-derived-fibrin-pptf
#14
Kazushige Isobe, Taisuke Watanebe, Hideo Kawabata, Yutaka Kitamura, Toshimitsu Okudera, Hajime Okudera, Kohya Uematsu, Kazuhiro Okuda, Koh Nakata, Takaaki Tanaka, Tomoyuki Kawase
BACKGROUND: Fibrin clot membranes prepared from advanced platelet-rich fibrin (A-PRF) or concentrated growth factors (CGF), despite their relatively rapid biodegradability, have been used as bioactive barrier membranes for alveolar bone tissue regeneration. As the membranes degrade, it is thought that the growth factors are gradually released. However, the mechanical and degradable properties of these membranes have not well been characterized. The purpose of this study was to mechanically and chemically characterize these membranes...
December 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/28462134/new-4-substituted-benzoyl-%C3%AE-d-glycoside-from-the-fruit-pulp-of-terminalia-belerica-with-antiplatelet-and-antioxidant-potency
#15
Vaseem Ahmad Ansari, Muhammad Arif, Md Sarfaraj Hussain, Hefazat Hussain Siddiqui, Rakesh Kumar Dixit
BACKGROUND: The fruit Terminalia belerica is a rich source of vitamins, acids, and nutraceuticals which have free radical scavenging activity. Thus, the ethanolic extract of fruit and its isolated compound (Tb-01) were intended to estimate antiplatelet and antioxidant activities. METHODS: The ethanolic extract was submitted to Si-gel CC and the compound was isolated. The compound Tb-01 was characterized as benzoyl-β-D-(4'→10″ geranilanoxy)-pyranosides on the basis of spectral data [ultra violet (UV), infrared (IR), (1)H nuclear magnetic resonance (NMR), (13)C NMR, and Mass Spectroscopy] and chemical analyses...
December 2016: Integr Med Res
https://www.readbyqxmd.com/read/28453295/postinjury-exercise-and-platelet-rich-plasma-therapies-improve-skeletal-muscle-healing-in-rats-but-are-not-synergistic-when-combined
#16
Paola Contreras-Muñoz, Joan Ramon Torrella, Xavier Serres, David Rizo-Roca, Meritxell De la Varga, Ginés Viscor, Vicente Martínez-Ibáñez, José Luis Peiró, Tero A H Järvinen, Gil Rodas, Mario Marotta
BACKGROUND: Skeletal muscle injuries are the most common sports-related injury and a major concern in sports medicine. The effect of platelet-rich plasma (PRP) injections on muscle healing is still poorly understood, and current data are inconclusive. PURPOSE: To evaluate the effects of an ultrasound-guided intramuscular PRP injection, administered 24 hours after injury, and/or posttraumatic daily exercise training for 2 weeks on skeletal muscle healing in a recently established rat model of skeletal muscle injury that highly mimics the muscle trauma seen in human athletes...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28452719/anosmia-treatment-by-platelet-rich-plasma-injection
#17
Panayiota Mavrogeni, Angelos Kanakopoulos, Stephanie Maihoub, Magdolna Krasznai, Agnes Szirmai
INTRODUCTION: Platelets are known for their key role in hemostasis and controlling the bleeding after injury. The fact that platelets secrete growth factors and active metabolites means that their applied use can have a positive influence in clinical situations requiring rapid healing and tissue regeneration. OBJECTIVES: Platelet Rich Plasma has been described as a promising but unproven therapy. MATERIALS AND METHODS: Whole blood was undergoing one stage of centrifugation...
April 19, 2017: International Tinnitus Journal
https://www.readbyqxmd.com/read/28450960/feasibility-of-improving-platelet-rich-plasma-therapy-by-using-chitosan-with-high-platelet-activation-ability
#18
Hidemi Hattori, Masayuki Ishihara
Platelet-rich plasma (PRP) is blood plasma containing a high number of platelets that release growth factors for wound healing and tissue regeneration. In the present study, the feasibility of improving PRP therapy by using chitosan that exhibits high platelet activation ability was investigated. A total of 13 chitosan samples with different molecular weight (Mw) and degree of deacetylation (DDA) were individually added to blood samples of rats and the amount of growth factors, albumin and fibrinogen in plasma was measured...
March 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28446315/-research-on-relation-of-platelet-aggregation-rate-with-platelet-concentration-in-platelet-rich-plasma
#19
Song-Mei Han, Wen-Li Liao, Shuai Yu
OBJECTIVE: To explore the effect of platelet concentration in platelet-rich plasma (PRP)' on platelet aggregation rate, to determine the allowed range of inducer adenosine diphosphate (ADP: 5.0 µmol/L, ADP: 1.5 µmol/L) and arachidonic acid (AA: 500.0 µg/ml) for platelet concentration in platelet aggregation rate. METHODS: The venous blood samples of 72 healthy persons with citrate anticoagulation were selected and divided into groups, every 12 cases were mixed for each group...
April 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28437133/the-impact-of-the-centrifuge-characteristics-and-centrifugation-protocols-on-the-cells-growth-factors-and-fibrin-architecture-of-a-leukocyte-and-platelet-rich-fibrin-l-prf-clot-and-membrane
#20
David M Dohan Ehrenfest, Nelson R Pinto, Andrea Pereda, Paula Jiménez, Marco Del Corso, Byung-Soo Kang, Mauricio Nally, Nicole Lanata, Hom-Lay Wang, Marc Quirynen
L-PRF (leukocyte- and platelet-rich fibrin) is one of the four families of platelet concentrates for surgical use and is widely used in oral and maxillofacial regenerative therapies. The first objective of this article was to evaluate the mechanical vibrations appearing during centrifugation in four models of commercially available table-top centrifuges used to produce L-PRF and the impact of the centrifuge characteristics on the cell and fibrin architecture of a L-PRF clot and membrane. The second objective of this article was to evaluate how changing some parameters of the L-PRF protocol may influence its biological signature, independently from the characteristics of the centrifuge...
April 24, 2017: Platelets
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