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https://www.readbyqxmd.com/read/28061032/effects-of-platelet-rich-plasma-with-concomitant-use-of-a-corticosteroid-on-tenocytes-from-degenerative-rotator-cuff-tears-in-interleukin-1%C3%AE-induced-tendinopathic-conditions
#1
Chris Hyunchul Jo, Seung Yeon Lee, Kang Sup Yoon, Sue Shin
BACKGROUND: A corticosteroid injection is commonly used to treat tendinopathy, but it has been associated with negative effects on tendon homeostasis. Platelet-rich plasma (PRP) is known to have proliferative and anabolic effects as well as cytoprotective effects against corticosteroids on tenocytes. However, the combined effects of a corticosteroid and PRP on the anti-inflammatory, matrix synthesis, and cytoprotective potential of tenocytes in conditions simulating tendinopathy have not been investigated...
January 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28056978/short-term-storage-stability-at-room-temperature-of-two-different-platelet-rich-plasma-preparations-from-equine-donors-and-potential-impact-on-growth-factor-concentrations
#2
Gregor Hauschild, Florian Geburek, Georg Gosheger, Maria Eveslage, Daniela Serrano, Arne Streitbürger, Sara Johannlükens, Dirk Menzel, Reinhard Mischke
BACKGROUND: The increasing interest in platelet-rich plasma (PRP) based therapies is as yet accompanied by inconsistent information regarding nearly all aspects of handling and application. Among these storage stability of processed platelet-rich products may be the basis for a more flexible application mode. The objective of this study was (1) to estimate the storage stability of growth factors platelet derived growth factor BB (PDGF-BB) and transforming growth factor ß1 (TGF-ß1) in both, a single-step softspin centrifugation-based pure-PRP (P-PRP, ACP®), and a gravity filtration system-based leukocyte-rich-PRP (L-PRP, E-PET), over a six hours time span after preparation at room temperature and (2) to identify possible factors influencing these growth factor concentrations in an equine model...
January 5, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28029568/differences-in-levels-of-platelet-derived-microparticles-in-platelet-components-prepared-using-the-platelet-rich-plasma-buffy-coat-and-apheresis-procedures
#3
Egarit Noulsri, Prapaporn Udomwinijsilp, Surada Lerdwana, Viroje Chongkolwatana, Parichart Permpikul
BACKGROUND: There has been an increased interest in platelet-derived microparticles (PMPs) in transfusion medicine. Little is known about PMP status during the preparation of platelet concentrates for transfusion. AIM: The aim of this study is to compare the PMP levels in platelet components prepared using the buffy coat (BC), platelet-rich plasma platelet concentrate (PRP-PC), and apheresis (AP) processes. METHODS: Platelet components were prepared using the PRP-PC and BC processes...
October 25, 2016: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28027451/the-use-of-platelet-rich-and-platelet-poor-plasma-to-enhance-differentiation-of-skeletal-myoblasts
#4
Olga Miroshnychenko, Wen-Teh Chang, Jason L Dragoo
BACKGROUND: Platelet-rich plasma (PRP) has been used to augment tissue repair and regeneration after musculoskeletal injury. However, there is increasing clinical evidence that PRP does not show a consistent clinical effect. Purpose/Hypothesis: This study aimed to compare the effects of the following non-neutrophil-containing (leukocyte-poor) plasma fractions on human skeletal muscle myoblast (HSMM) differentiation: (1) PRP, (2) modified PRP (Mod-PRP), in which transforming growth factor β1 (TGF-β1) and myostatin (MSTN) were depleted, and (3) platelet-poor plasma (PPP)...
December 1, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27993718/topical-use-of-platelet-rich-plasma-can-improve-the-clinical-outcomes-after-total-knee-arthroplasty-a-systematic-review-and-meta-analysis-of-1316-patients
#5
REVIEW
Fa-Xin Li, Yi Li, Chuan-Wu Qiao, Jie Zhu, Jian Chen, Pei-Yi Zhang
OBJECTIVE: Platelet-rich plasma (PRP) is extracted by centrifuging whole blood and characterized with a high concentration of platelets. The purpose of this systematic review and meta-analysis of randomized controlled trials (RCTs) and non-RCTs is to evaluate the efficacy and safety of platelet-rich plasma (PRP) versus placebo after total knee arthroplasty (TKA). METHODS: The Electronic databases of PubMed, Web of Science, Embase and Cochrane Database of Systematic Reviews were searched from inception to November 2016 and any studies involving PRP versus placebo for patients prepared for TKA were selected by two reviewers...
December 18, 2016: International Journal of Surgery
https://www.readbyqxmd.com/read/27987720/fabrication-and-characterization-of-platelet-rich-plasma-scaffolds-for-tissue-engineering-applications
#6
Mahmoud Sadeghi-Ataabadi, Zohreh Mostafavi-Pour, Zahra Vojdani, Mahsa Sani, Mona Latifi, Tahereh Talaei-Khozani
Platelet-Rich Plasma (PRP), as a rich source of growth factor, can form a fibrin gel that recapitulates the extracellular matrix of the tissues. The aim of this study was to evaluate the effects of different concentrations of CaCl2 on the PRP scaffold structure which in turn could change the cell's behavior. PRP was mixed with 2.5, 5 and 10% (w/v) CaCl2. Then, the tensile strength, biodegradability and water content of the scaffolds were evaluated. We also performed immunostaining for assessment of the actin stress fiber orientation and SEM for detecting the cell phenotype and physical properties of the fibers...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27918883/platelet-rich-plasma-in-androgenic-alopecia-indications-technique-and-potential-benefits
#7
REVIEW
Elie M Ferneini, Daniel Beauvais, Concetta Castiglione, Moniek V Ferneini
PURPOSE: The purpose of this study was to provide an overview of platelet-rich plasma (PRP) injected into the scalp for the management of androgenic alopecia. MATERIALS AND METHODS: A literature review was performed to evaluate the benefits of PRP in androgenic alopecia. RESULTS: Hair restoration has been increasing. PRP's main components of platelet-derived growth factor, transforming growth factor, and vascular endothelial growth factor have the potential to stimulate hard and soft tissue wound healing...
November 15, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27904584/effectiveness-and-relevant-factors-of-platelet-rich-plasma-treatment-in-managing-plantar-fasciitis-a-systematic-review
#8
REVIEW
Seet Khing Chiew, Thamil Selvee Ramasamy, Farahnaz Amini
BACKGROUND: Plantar fasciitis (PF) is a common foot complaint, affects both active sportsmen and physically inactive middle age group. It is believed that PF results from degenerative changes rather than inflammation. Platelet-rich plasma (PRP) therapy has been introduced as an alternative therapy for PF. This study is aimed to systematically review to the effectiveness and relevant factors of PRP treatment in managing PF. MATERIALS AND METHODS: A search was conducted in electronic databases, including PubMed, Scopus, and Google Scholar using different keywords...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27903591/platelet-rich-plasma-powder-a-new-preparation-method-for-the-standardization-of-growth-factor-concentrations
#9
Matthias Kieb, Frank Sander, Cornelia Prinz, Stefanie Adam, Anett Mau-Möller, Rainer Bader, Kirsten Peters, Thomas Tischer
BACKGROUND: Platelet-rich plasma (PRP) is widely used in sports medicine. Available PRP preparations differ in white blood cell, platelet, and growth factor concentrations, making standardized research and clinical application challenging. PURPOSE: To characterize a newly standardized procedure for pooled PRP that provides defined growth factor concentrations. STUDY DESIGN: Controlled laboratory study. METHODS: A standardized growth factor preparation (lyophilized PRP powder) was prepared using 12 pooled platelet concentrates (PCs) derived from different donors via apheresis...
November 30, 2016: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/27900294/efficacy-of-autologous-leukocyte-reduced-platelet-rich-plasma-therapy-for-patellar-tendinopathy-in-a-rat-treadmill-model
#10
Mamoru Yoshida, Hiroki Funasaki, Keishi Marumo
BACKGROUND: An autologous platelet-rich plasma (PRP) therapy has currently been applied for the tendinopathy; however, its efficacy and an optimal platelets concentration in PRP were uncertain. We analyzed them in an animal model prepared using a repetitive running exercise. METHODS: We made the tendinopathy rat model of patellar tendon using a rodent treadmill machine. Rats with tendinopathy were injected with leukocyte-reduced PRP at the platelets concentration of 1...
April 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/27900293/combined-use-of-platelet-rich-plasma-micro-fat-in-sport-and-race-horses-with-degenerative-joint-disease-preliminary-clinical-study-in-eight-horses
#11
Fabrizio Bembo, Julia Eraud, Cecile Philandrianos, Baptiste Bertrand, Alain Silvestre, Julie Veran, Florence Sabatier, Guy Magalon, Jeremy Magalon
BACKGROUND: To assess the safety and potential efficacy of a standardized technique consisting of intra-articular injection of 10 cc of a homogeneous mixed product using autologous micro-fat and platelet rich plasma (PRP) (ratio 1:1) in the carpus or the fetlock joint of sport horses presenting degenerative joint disease (DJD). METHODS: Eight sport horses with DJD confirmed by radiography and ultrasonography and causing lameness and the impossibility to compete were treated...
April 2016: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/27900155/normal-platelet-function-in-platelet-concentrates-requires-non-platelet-cells-a-comparative-in-vitro-evaluation-of-leucocyte-rich-type-1a-and-leucocyte-poor-type-3b-platelet-concentrates
#12
William R Parrish, Breana Roides, Julia Hwang, Michael Mafilios, Brooks Story, Samir Bhattacharyya
BACKGROUND: Therapeutic success of platelet-rich plasma (PRP) may vary based on the composition and preparation method. The objective of this study was to evaluate the cellular components of platelet concentrates produced by a leucocyte-rich (LR-PRP) and a leucocyte-poor PRP systems (LP-PRP). METHODS: Parameters evaluated included platelet recovery, platelet concentration, red blood cell (RBC) and white blood cell (WBC) composition, platelet growth factor release and stimulation of human tendon cell proliferation in vitro...
2016: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/27900152/depa-classification-a-proposal-for-standardising-prp-use-and-a-retrospective-application-of-available-devices
#13
J Magalon, A L Chateau, B Bertrand, M L Louis, A Silvestre, L Giraudo, J Veran, F Sabatier
BACKGROUND/AIM: Significant biological differences in platelet-rich plasma (PRP) preparations have been highlighted and could explain the large variability in the clinical benefit of PRP reported in the literature. The scientific community now recommends the use of classification for PRP injection; however, these classifications are focused on platelet and leucocyte concentrations. This presents the disadvantages of (1) not taking into account the final volume of the preparation; (2) omitting the presence of red blood cells in PRP and (3) not assessing the efficiency of production...
2016: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/27891436/platelet-rich-plasma-efficacy-in-treating-trophic-ulcers-in-leprosy
#14
V Anandan, W Afthab Jameela, P Saraswathy, S Sarankumar
INTRODUCTION: Trophic ulcers secondary to leprosy pose a great stigma to the patients and remain a challenge to the treating dermatologists. The discovery of Platelet Rich Plasma (PRP) with its favourable role in wound healing is a boon for the patients. PRP introduces the growth factors directly into the wound and aids in rapid healing. AIM: To study the efficacy and safety of PRP in the healing of trophic ulcers secondary to Hansen's disease in a tertiary care centre in Southern India...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27865782/application-of-nano-lc-maldi-tof-tof-ms-for-proteomic-analysis-of-microvesicles
#15
Joanna Kasprzyk, Ewa Stępień, Wojciech Piekoszewski
Activated platelets and platelet derived microvesicles (PMVs) emerged recently to be promising biomarkers. There is no universal procedure to carry out the proteomic analysis on microvesicles. In this study we proposed a nano-liquid chromatography (nano-LC) technique coupled off-line with a spectrometric measurement MALDI-TOF-MS/MS as a throughput and time-saving procedure. In this study we developed a simplified method to evaluate the protein composition of platelet organelles and PMVs. Platelet-rich plasma (PRP) was collected from healthy donors...
November 16, 2016: Clinical Biochemistry
https://www.readbyqxmd.com/read/27863057/platelet-rich-plasma-based-bioactive-membrane-as-a-new-advanced-wound-care-tool
#16
Raffaele Spanò, Anita Muraglia, Maria R Todeschi, Marta Nardini, Paolo Strada, Ranieri Cancedda, Maddalena Mastrogiacomo
Chronic skin ulcers, consequence of diabetes and other pathological conditions, heavily compromise the patients' life quality and represent a high and constantly growing cost for National Health Services. Autologous Platelet Rich Plasma (PRP), has been proposed to treat these lesions. The absence of guidelines for the PRP production and the need of a fresh preparation for each treatment lead us to develop a protocol for the production of an allogenic PRP based bioactive membrane (BAM), standardized for platelet concentration and growth factor release...
November 13, 2016: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/27836542/anchorless-forms-of-prion-protein-impact-of-truncation-on-structure-destabilization-and-prion-protein-conversion
#17
Valerija Kovač, Iva Hafner-Bratkovič, Vladka Čurin Šerbec
Prion diseases are a group of fatal neurodegenerative diseases caused by scrapie form of prion protein, PrP(Sc). Prion protein (PrP) is bound to the cell via glycophosphatidylinositol (GPI) anchor. The role of GPI anchor in PrP(Sc) replication and propagation remains unclear. It has been shown that anchorless and truncated PrP accelerate the formation and propagation of prions in vivo and further increases the risk for transmission of prion diseases among species. To explain the role of anchorless forms of PrP in the development of prion diseases, we have prepared five C-terminal PrP truncated variants, determined their thermodynamic properties and analyzed the kinetics of conversion into amyloid fibrils...
December 2, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27833116/freeze-dried-platelet-rich-plasma-accelerates-bone-union-with-adequate-rigidity-in-posterolateral-lumbar-fusion-surgery-model-in-rats
#18
Yasuhiro Shiga, Sumihisa Orita, Go Kubota, Hiroto Kamoda, Masaomi Yamashita, Yusuke Matsuura, Kazuyo Yamauchi, Yawara Eguchi, Miyako Suzuki, Kazuhide Inage, Takeshi Sainoh, Jun Sato, Kazuki Fujimoto, Koki Abe, Hirohito Kanamoto, Masahiro Inoue, Hideyuki Kinoshita, Yasuchika Aoki, Tomoaki Toyone, Takeo Furuya, Masao Koda, Kazuhisa Takahashi, Seiji Ohtori
Fresh platelet-rich plasma (PRP) accelerates bone union in rat model. However, fresh PRP has a short half-life. We suggested freeze-dried PRP (FD-PRP) prepared in advance and investigated its efficacy in vivo. Spinal posterolateral fusion was performed on 8-week-old male Sprague-Dawley rats divided into six groups based on the graft materials (n = 10 per group): sham control, artificial bone (A hydroxyapatite-collagen composite) -alone, autologous bone, artificial bone + fresh-PRP, artificial bone + FD-PRP preserved 8 weeks, and artificial bone + human recombinant bone morphogenetic protein 2 (BMP) as a positive control...
November 11, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27808552/separating-limits-on-preparation-versus-online-processing-in-multitasking-paradigms-evidence-for-resource-models
#19
Victor Mittelstädt, Jeff Miller
We conducted 2 multitasking experiments to examine the finding that first-task reaction times (RTs) are slower in the psychological refractory period (PRP) paradigm than in the prioritized processing (PP) paradigm. To see whether this difference between the 2 paradigms could be explained entirely by differences in first-task preparation, which would be consistent with the standard response selection bottleneck (RSB) model for multitasking interference, we compared the size of this difference for trials in which a second-task stimulus actually occurred against the size of the difference for trials without any second-task stimulus...
January 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/27805447/evaluation-of-two-platelet-rich-plasma-processing-methods-and-two-platelet-activation-techniques-for-use-in-llamas-and-alpacas
#20
Stacy A Semevolos, Cori D Youngblood, Stephanie K Grissom, M Elena Gorman, Maureen K Larson
OBJECTIVE To evaluate 2 processing methods (commercial kit vs conical tube centrifugation) for preparing platelet rich plasma (PRP) for use in llamas and alpacas. SAMPLES Blood samples (30 mL each) aseptically collected from 6 healthy llamas and 6 healthy alpacas. PROCEDURES PRP was prepared from blood samples by use of a commercial kit and by double-step conical tube centrifugation. A CBC was performed for blood and PRP samples. Platelets in PRP samples were activated by means of a freeze-thaw method with or without 23mM CaCl2, and concentrations of platelet-derived growth factor-BB and transforming growth factor-β1 were measured...
November 2016: American Journal of Veterinary Research
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