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https://www.readbyqxmd.com/read/29244965/management-of-chronic-diabetic-foot-ulcers-using-platelet-rich-plasma
#1
V Babaei, H Afradi, H Z Gohardani, F Nasseri, M Azarafza, S Teimourian
OBJECTIVE: Platelet-rich plasma (PRP) has been proposed as an adjunct for the treatment of foot ulcers in patients with diabetes, as well as a treatment for chronic and acute wounds. This study examined the application of PRP in the treatment of diabetic foot ulcers (DFUs) in patients. METHODS: This prospective study was conducted between 2011 and 2014. We used PRP, produced by a kit, for the treatment of DFUs. Patients were allocated to one of three groups, according to size of ulcer...
December 2, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/29243256/the-effectiveness-of-platelet-rich-plasma-in-an-anosmia-induced-mice-model
#2
Ahmet Gorkem Yasak, Ozgur Yigit, Ela Araz Server, Sevgi Durna Dastan, Mehmet Gul
OBJECTIVE: In this study, we aimed to functionally and morphologically demonstrate the effectiveness of platelet-rich plasma (PRP) on anosmia in a mouse model of anosmia. STUDY DESIGN: Animal study. METHODS: A total of 16 male mice were included. When selecting the mice, the food-finding test (FFT) was used to make sure that the animals could smell, and anosmia was induced by administration of intraperitoneal 3-methylindole. The mice were randomly divided into two groups of eight (groups A and B)...
December 15, 2017: Laryngoscope
https://www.readbyqxmd.com/read/29240682/recombinant-prp-and-its-contribution-to-research-on-transmissible-spongiform-encephalopathies
#3
REVIEW
Jorge M Charco, Hasier Eraña, Vanessa Venegas, Sandra García-Martínez, Rafael López-Moreno, Ezequiel González-Miranda, Miguel Ángel Pérez-Castro, Joaquín Castilla
The misfolding of the cellular prion protein (PrPC) into the disease-associated isoform (PrPSc) and its accumulation as amyloid fibrils in the central nervous system is one of the central events in transmissible spongiform encephalopathies (TSEs). Due to the proteinaceous nature of the causal agent the molecular mechanisms of misfolding, interspecies transmission, neurotoxicity and strain phenomenon remain mostly ill-defined or unknown. Significant advances were made using in vivo and in cellula models, but the limitations of these, primarily due to their inherent complexity and the small amounts of PrPSc that can be obtained, gave rise to the necessity of new model systems...
December 14, 2017: Pathogens
https://www.readbyqxmd.com/read/29240523/injectable-platelet-rich-fibrin-using-the-low-speed-centrifugation-concept-improves-cartilage-regeneration-when-compared-to-platelet-rich-plasma
#4
Mustafa Abd El Raouf, Xuzhu Wang, Si Miusi, Jihua Chai, Abdel Basit Mohamed AbdEl-Aal, Mekkawy M Nefissa Helmy, Shahram Ghanaati, Joseph Choukroun, Elisa Choukroun, Yufeng Zhang, Richard J Miron
The aim of the present study was to evaluate the effect of injectable platelet-rich fibrin (i-PRF) on cultivated chondrocytes and osteochondral regeneration in critical-sized osteochondral defect of the rabbit's knee in comparison to autologous platelet-rich plasma (PRP). Chondrocytes were first investigated for their ability to proliferate and differentiate in response to PRP and i-PRF. Thereafter, full-thickness critical-sized osteochondral defects 5 mm in diameter and 5 mm in depth were created in the knee joint of 12 adult female New Zealand White rabbits...
December 14, 2017: Platelets
https://www.readbyqxmd.com/read/29240410/determining-the-relative-susceptibility-of-four-prp-genotypes-to-atypical-scrapie
#5
Christopher J Silva, Melissa L Erickson-Beltran, Inmaculada Martin-Burriel, Juan José Badiola, Jesus Rodriguez Requena, Rosa Bolea
Atypical scrapie is a sheep prion (PrPSc) disease whose epidemiology is consistent with a sporadic origin and is associated with specific polymorphisms of the normal cellular prion protein (PrPC). To determine the relative amounts of PrP polymorphisms present in scrapie, total PrP was digested with chymotrypsin to generate characteristic peptides spanning relevant polymorphisms at positions 136, 141, 154, 171 and 172 of sheep PrPC. A multiple reaction monitoring method (MRM), employing 15N-labeled internal standards, was used to detect and quantify these polymorphisms present in both the PrPSc and PrPC from heterozygous (ALRRY and ALHQY or ALRQD or AFRQY) atypical scrapie-infected or uninfected control sheep...
December 14, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29238734/platelet-rich-plasma-injection-with-percutaneous-needling-for-recalcitrant-lateral-epicondylitis-comparison-of-tenotomy-and-fenestration-techniques
#6
Michael P Gaspar, Michael A Motto, Sarah Lewis, Sidney M Jacoby, Randall W Culp, A Lee Osterman, Patrick M Kane
Background: Recalcitrant lateral epicondylitis (LE) is a common debilitating condition, with numerous treatment options of varying success. An injection of platelet-rich plasma (PRP) has been shown to improve LE, although it is unclear whether the method of needling used in conjunction with a PRP injection is of clinical importance. Purpose: To determine whether percutaneous needle tenotomy is superior to percutaneous needle fenestration when each is combined with a PRP injection for the treatment of recalcitrant LE...
December 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29238638/efficacy-of-early-fusion-with-local-bone-graft-and-platelet-rich-plasma-in-lumbar-spinal-fusion-surgery-followed-over-10-years
#7
Shiro Imagama, Kei Ando, Kazuyoshi Kobayashi, Yoshimoto Ishikawa, Hiroshi Nakamura, Tetsuro Hida, Kenyu Ito, Mikito Tsushima, Akiyuki Matsumoto, Masayoshi Morozumi, Satoshi Tanaka, Masaaki Machino, Kyotaro Ota, Hiroaki Nakashima, Junki Takamatsu, Tadashi Matsushita, Yoshihiro Nishida, Naoki Ishiguro, Yukihiro Matsuyama
Study Design: Prospective clinical study. Objective: Many oral surgeons use platelet-rich plasma (PRP) for bone defects, but the efficacy of PRP for spinal arthrodesis remains uncertain. The objective was to compare the efficacy of autologous local bone graft and PRP with local bone graft alone for promotion of bony union in posterolateral lumbar fusion (PLF) surgery, with investigation of the safety of PRP over 10 years. Methods: A prospective study was conducted in 29 consecutive patients who underwent one-level PLF at L4/5 for degenerative lumbar disease...
December 2017: Global Spine Journal
https://www.readbyqxmd.com/read/29234653/evaluation-of-the-effectiveness-of-platelet-rich-plasma-in-the-bone-consolidation-of-patients-submitted-to-lumbar-arthrodesis
#8
Caroline Ferraz Rezende, Danielly de Paula Azevedo, Rafael Burgomeister Lourenço, José Fernando Duarte, Igor Machado Cardoso, Charbel Jacob Júnior
Objective: To determine whether the use of autograft associated with platelet-rich plasma (PRP) increases bone healing in patients undergoing lumbar fusion. Method: This was a prospective, descriptive, and comparative study, which included 40 patients undergoing lumbar fusion, who were divided into two groups: group I, autograft only, and group II, autograft associated with PRP. After surgery, patients were followed-up on the first, third, and sixth month. The Molinari radiographic classification and Glassman tomographic classification were used as criteria to analyze the bone consolidation...
November 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/29228441/correlation-between-individual-inflammation-genetic-profile-and-platelet-rich-plasma-efficacy-in-hair-follicle-regeneration-a-pilot-study-reveals-prognostic-value-of-il-1a-polymorphism
#9
F Rossano, S Di Martino, L Iodice, M Di Paolo, S Misso, R Tomeo, A M Marini, R Brugnone, S Marlino, A Santorelli, R Di Francia
OBJECTIVE: Hair loss generates severe psychosocial implications. To date, exploring the prognostic factors of possible clinical benefit of autologous blood concentrate platelet rich plasma (PRP) was failed. The aim of our pilot study was to explore the correlation between the individual inflammation genetic profile and PRP efficacy in the treatment of hair follicle regeneration. PATIENTS AND METHODS: 41 volunteers (25 men, 16 women) took part in this retrospective study...
November 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29226987/protective-effect-of-platelet-rich-plasma-on-urethral-injury-model-of-male-rats
#10
Hasan H Tavukcu, Ömer Aytaç, Fatih Atuğ, Burçin Alev, Özge Çevik, Nurdan Bülbül, Ayşen Yarat, Şule Çetinel, Göksel Şener, Haluk Kulaksızoğlu
AIMS: Urethral stricture (US) formation is caused by fibrosis after excessive collagen formation following an injury or trauma to the urethra. In this study, we aimed to evaluate the effects of platelet-rich plasma (PRP) on a urethral injury (UI) model of male rats. METHODS: A UI model was used by applying a coagulation current to the urethras of male rats. There were four groups with six rats in each: control group, PRP applied to naive urethra, UI group, and UI with PRP application...
December 11, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/29226630/microneedling-combined-with-platelet-rich-plasma-or-trichloroacetic-acid-peeling-for-management-of-acne-scarring-a-split-face-clinical-and-histologic-comparison
#11
Moetaz El-Domyati, Hossam Abdel-Wahab, Aliaa Hossam
BACKGROUND: Minimally invasive procedures provide effective, safe, relatively long-lasting, and natural results without large damage to the skin. A combination treatment is considered an approach that includes at least 2 different and unrelated modalities. OBJECTIVES: This study aims to evaluate the use and effectiveness of some combined minimally invasive procedures for management of acne scarring. PATIENTS/METHODS: Twenty-four volunteers with postacne atrophic scars were randomly divided into 3 equal groups according to performed procedure on each side of the face (microneedling by dermaroller alone or combined with platelet-rich plasma [PRP] or trichloroacetic acid [TCA] 15% peeling) and received 6 bi-weekly sessions of treatment...
December 10, 2017: Journal of Cosmetic Dermatology
https://www.readbyqxmd.com/read/29226205/clinical-results-of-platelet-rich-plasma-for-partial-thickness-rotator-cuff-tears-a-case-series
#12
Zohreh Zafarani, Fateme Mirzaee, Mohamadreza Guity, Hamidreza Aslani
Partial thickness rotator cuff tears (PTRCTs) are a common pathology among shoulder disorders in people over 50 years. Treatment of PTRCTs remains controversial. Most studies on the treatment of PTRCTs have explained surgical techniques or outcomes; few studies have centralized on the conservative and new management of PTRCTs, like treatment with Platelet-rich plasma (PRP). These case series study have been conducted on Platelet-rich plasma (PRP) injection, as a concentrated source of cytokines that can stimulate healing of soft tissue...
September 2017: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/29223483/differences-by-sex-in-igg-levels-following-infant-and-childhood-vaccinations-an-individual-participant-data-meta-analysis-of-vaccination-studies
#13
Anna G C Boef, Fiona R M van der Klis, Guy A M Berbers, Anne-Marie Buisman, Elisabeth A M Sanders, Jeanet M Kemmeren, Arie van der Ende, Hester E de Melker, Nynke Y Rots, Mirjam J Knol
BACKGROUND: If immune responses to vaccination differ between males and females, sex-specific vaccination schedules may be indicated. We systematically reanalysed childhood vaccination studies conducted in The Netherlands for sex-differences in IgG-responses. To assess the impact of potential sex-differences in IgG-responses, we explored sex-differences in vaccine failure/effectiveness and reactogenicity. METHODS: Six studies with IgG-measurements for 1577 children following infant pneumococcal (PCV7/PCV10/PCV13) and/or DTaP-IPV-Hib(-HepB) vaccinations, or the pre-school DTaP-IPV booster were included...
December 6, 2017: Vaccine
https://www.readbyqxmd.com/read/29220360/substitutions-of-prp-n-terminal-histidine-residues-modulate-scrapie-disease-pathogenesis-and-incubation-time-in-transgenic-mice
#14
Sabina Eigenbrod, Petra Frick, Uwe Bertsch, Gerda Mitteregger-Kretzschmar, Janina Mielke, Marko Maringer, Niklas Piening, Alexander Hepp, Nathalie Daude, Otto Windl, Johannes Levin, Armin Giese, Vignesh Sakthivelu, Jörg Tatzelt, Hans Kretzschmar, David Westaway
Prion diseases have been linked to impaired copper homeostasis and copper induced-oxidative damage to the brain. Divalent metal ions, such as Cu2+ and Zn2+, bind to cellular prion protein (PrPC) at octapeptide repeat (OR) and non-OR sites within the N-terminal half of the protein but information on the impact of such binding on conversion to the misfolded isoform often derives from studies using either OR and non-OR peptides or bacterially-expressed recombinant PrP. Here we created new transgenic mouse lines expressing PrP with disrupted copper binding sites within all four histidine-containing OR's (sites 1-4, H60G, H68G, H76G, H84G, "TetraH>G" allele) or at site 5 (composed of residues His-95 and His-110; "H95G" allele) and monitored the formation of misfolded PrP in vivo...
2017: PloS One
https://www.readbyqxmd.com/read/29215443/scaffold-free-bone-regeneration-using-platelet-rich-fibrin-in-calvarial-defect-model
#15
Yeo Reum Jeon, Mi Jung Kim, Yong Oock Kim, Tai Suk Roh, Won Jai Lee, Eun Hye Kang, In Sik Yun
Bone regeneration is a complex process influenced by various physiological factors. Platelet-rich plasma (PRP) contains many growth factors and has shown osteogenic effects. The PRP is usually activated before use. However, the authors showed that nonactivated PRP (nPRP) and activated PRP have comparable osteogenic effects in the previous study. Generally, a scaffold has been needed for the application of PRP in the cranial defect model. In this study, the authors aimed to compare the performance of scaffold free platelet-rich fibrin (PRF) to nPRP as an adjuvant for bone regeneration...
December 6, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29215166/effectiveness-of-platelet-rich-plasma-therapy-in-wound-healing-of-pilonidal-sinus-surgery-a-comprehensive-systematic-review-and-meta-analysis
#16
Shayan Mostafaei, Fatemeh Norooznezhad, Saeed Mohammadi, Amir Hossein Norooznezhad
BACKGROUND: Pilonidal disease (PD) is a chronic situation which may cause pain, discomfort, inflammation, discharges, and inability to do daily routines. Among two main methods of surgery, open healing is preferred by surgeons since it associates with lower risk of recurrence; however, it could complicate the wound condition by delaying the healing process. METHODS: For this meta-analysis, a search in Medline, Embase and Scopus was performed in June 2017 with no restrictions placed on the publication date or languages...
December 7, 2017: Wound Repair and Regeneration
https://www.readbyqxmd.com/read/29214094/study-of-a-two-step-centrifugation-protocol-for-concentrating-cells-and-growth-factors-in-bovine-platelet-rich-plasma
#17
Claudia M Gutiérrez, Catalina López, Carlos E Giraldo, Jorge U Carmona
There is a lack of information about the methods used for bovine platelet-rich plasma (PRP)/platelet-rich gel (PRG) procurement, including information on platelet (PLT), white blood cell (WBC) in PRP, and growth factor release from PRG supernatants. The aims of this study were to compare and to correlate the PLT, WBC, transforming growth factor beta-1 (TGF-β1), and platelet-derived growth factor BB (PDGF-BB) concentrations in bovine whole blood, plasma, and four PRP layers and their respective PRG supernatants: A and B (obtained by a single centrifugation tube method at 720g/5 min) and C and D (obtained by a double centrifugation tube method, by using two centrifugation episodes at 720g/5 min)...
2017: Veterinary Medicine International
https://www.readbyqxmd.com/read/29212698/corrigendum
#18
(no author information available yet)
Refaie R, Rushton PRP, McGovern PD, Thompson D, Serrano-Pedraza I, Rankin KS, Reed MR. The effect of operating lights on laminar flow: an experimental study using neutrally buoyant helium bubbles. Bone Joint J 2017;99-B:1061-1066.
December 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/29211969/use-of-platelet-rich-plasma-immediately-after-an-injury-did-not-improve-ligament-healing-and-increasing-platelet-concentrations-was-detrimental-in-an-in-vivo-animal-model
#19
Robert F LaPrade, Laurie R Goodrich, Jennifer Phillips, Grant J Dornan, Travis Lee Turnbull, Michael L Hawes, Kimi D Dahl, Ashley N Coggins, John Kisiday, David Frisbie, Jorge Chahla
BACKGROUND: Limited information in basic science and clinical trials exists to determine if ligament healing may be accelerated with the use of biological adjuvants, such as platelet-rich plasma (PRP). However, there has been widespread acceptance of PRP for use in clinical practice, despite an inadequate understanding of its biological mechanism of action. PURPOSE: To determine whether a single dose of PRP could accelerate ligament healing and correspondingly improve histological characteristics and biomechanical properties when injected immediately postoperatively into the injured medial collateral ligament (MCL) of New Zealand White rabbits...
December 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29211968/men-and-women-differ-in-the-biochemical-composition-of-platelet-rich-plasma
#20
Grace Xiong, Nithya Lingampalli, Jayme C B Koltsov, Lawrence L Leung, Nidhi Bhutani, William H Robinson, Constance R Chu
BACKGROUND: Autologous platelet-rich plasma (PRP) is widely used for a variety of clinical applications. However, clinical outcome studies have not consistently shown positive effects. The composition of PRP differs based on many factors. An improved understanding of factors influencing the composition of PRP is important for the optimization of PRP use. HYPOTHESIS: Age and sex influence the PRP composition in healthy patients. STUDY DESIGN: Controlled laboratory study...
November 1, 2017: American Journal of Sports Medicine
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