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https://www.readbyqxmd.com/read/28210651/analysis-of-platelet-rich-plasma-extraction-variations-in-platelet-and-blood-components-between-4-common-commercial-kits
#1
Jane Fitzpatrick, Max K Bulsara, Paul Robert McCrory, Martin D Richardson, Ming Hao Zheng
BACKGROUND: Platelet-rich plasma (PRP) has been extensively used as a treatment in tissue healing in tendinopathy, muscle injury, and osteoarthritis. However, there is variation in methods of extraction, and this produces different types of PRP. PURPOSE: To determine the composition of PRP obtained from 4 commercial separation kits, which would allow assessment of current classification systems used in cross-study comparisons. STUDY DESIGN: Controlled laboratory study...
January 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28196154/enhancement-of-immediate-implant-stability-and-recovery-using-platelet-rich-fibrin
#2
Elif Öncü, Ahmet Afşin Erbeyoğlu
The objective of this study was to evaluate the effect of leukocyte platelet-rich fibrin (L-PRF) on immediate implant stability and recovery. A total of 60 immediate implants were evaluated. After the extraction, using split-mouth design, test sockets were coated with L-PRF (L-PRF+) and control sockets were not (L-PRF-). All the implants were followed for 12 months. Results showed a statistically significant difference between the stability of L-PRF+ and L-PRF- implants at 1 week and at 1 month. Mean marginal bone resorption was higher in the control group at 1 year...
February 14, 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28180044/role-of-leukocyte-platelet-rich-fibrin-in-endoscopic-endonasal-skull-base-surgery-defect-reconstruction
#3
Liuba Soldatova, Raewyn G Campbell, Ahmad H Elkhatib, Thomas W Schmidt, Nelson R Pinto, Jaime M Pinto, Daniel M Prevedello, Leo F Ditzel Filho, Bradley A Otto, Ricardo L Carrau
Objective Advancements in endoscopic endonasal approaches have increased the extent and complexity of skull base resections, in turn demanding the development of novel techniques for skull base defect reconstruction. The objective of this pilot study was to investigate the effect of leukocyte-platelet-rich fibrin (L-PRF) on the postoperative healing after endoscopic skull base surgery. Methods Between January and May of 2015, 47 patients underwent endoscopic endonasal resection of sellar, parasellar, and suprasellar lesions with the application of L-PRF membranes during the skull base reconstruction at two surgical centers...
February 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/28157391/microbes-associate-with-host-innate-immune-response-in-idiopathic-pulmonary-fibrosis
#4
Yong Huang, Shwu-Fan Ma, Milena S Espindola, Rekha Vij, Justin M Oldham, Gary B Huffnagle, John R Erb-Downward, Kevin R Flaherty, Beth B Moore, Eric S White, Tong Zhou, Jianrong Li, Yves A Lussier, MeiLan K Han, Naftali Kaminski, Joe G N Garcia, Cory M Hogaboam, Fernando J Martinez, Imre Noth
RATIONALE: Differences in the lung microbial community influence idiopathic pulmonary fibrosis (IPF) progression. Whether the lung microbiome influences IPF host defense remains unknown. OBJECTIVES: To explore the host immune response and microbial interaction in IPF, as they relate to progression-free survival (PFS), fibroblast function, and leukocyte phenotypes. METHODS: Paired microarray gene expression data from peripheral blood mononuclear cells (PBMCs) and 16s rRNA sequencing data from bronchoalveolar lavage (BAL) obtained as part of the COMET-IPF study were used to conduct association pathway analyses...
February 3, 2017: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28146403/hyaluronic-acid-versus-platelet-rich-plasma
#5
Brian J Cole, Vasili Karas, Kristen Hussey, Kyle Pilz, Lisa A Fortier
BACKGROUND: The use of platelet-rich plasma (PRP) for the treatment of osteoarthritis (OA) has demonstrated mixed clinical outcomes in randomized controlled trials when compared with hyaluronic acid (HA), an accepted nonsurgical treatment for symptomatic OA. Biological analysis of PRP has demonstrated an anti-inflammatory effect on the intra-articular environment. PURPOSE: To compare the clinical and biological effects of an intra-articular injection of PRP with those of an intra-articular injection of HA in patients with mild to moderate knee OA...
February 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28093204/chin-symphysis-bone-allograft-and-platelet-rich-fibrin-is-the-combination-effective-in-repair-of-alveolar-cleft
#6
Bijan Movahedian Attar, Navid Naghdi, Milad Etemadi Sh, Mojdeh Mehdizadeh
PURPOSE: Secondary grafting of alveolar defects with iliac crest bone is a common treatment method in cleft patients. The aim of this study was to evaluate the effectiveness of the combination of symphysis bone, allograft, and platelet-rich fibrin in regeneration of alveolar defects compared with iliac bone graft. MATERIALS AND METHODS: In this randomized clinical trial, patients with unilateral alveolar defects were divided randomly into two categories. Group A comprised patients in whom the combination of chin symphysis bone plus allogeneic bone material plus leukocyte- and platelet-rich fibrin was considered for treatment...
December 26, 2016: Journal of Oral and Maxillofacial Surgery
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
#7
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/28042979/does-the-addition-of-bone-morphogenetic-protein-2-to-platelet-rich-fibrin-improve-healing-after-treatment-for-medication-related-osteonecrosis-of-the-jaw
#8
Jung-Hyun Park, Jin-Woo Kim, Sun-Jong Kim
PURPOSE: To investigate the effect of the addition of bone morphogenetic protein 2 (BMP-2) to leukocyte-rich and platelet-rich fibrin (L-PRF) on the treatment of medication-related osteonecrosis of the jaws (MRONJ), this study compared the healing outcome of combined use of BMP-2 and L-PRF with single use of L-PRF. PATIENTS AND METHODS: Of 55 patients who were diagnosed with MRONJ, 25 were treated with L-PRF alone and 30 were treated with L-PRF and recombinant human BMP-2...
December 11, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28027451/the-use-of-platelet-rich-and-platelet-poor-plasma-to-enhance-differentiation-of-skeletal-myoblasts
#9
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/28026029/anti-lgi1-encephalitis-is-associated-with-unique-hla-subtypes
#10
Tae-Joon Kim, Soon-Tae Lee, Jangsup Moon, Jun-Sang Sunwoo, Jung-Ick Byun, Jung-Ah Lim, Yong-Won Shin, Jin Sun Jun, Han Sang Lee, Woo-Jin Lee, Ah Reaum Yang, Yunhee Choi, Kyung-Il Park, Keun-Hwa Jung, Ki-Young Jung, Manho Kim, Sang Kun Lee, Kon Chu
OBJECTIVE: Autoimmune encephalitis, represented by anti-leucine-rich glioma-inactivated 1 (anti-LGI1) and anti-N-methyl-D-aspartate receptor (anti-NMDAR) encephalitis, has increasing clinical significance based on recent discoveries of neuronal autoantibodies. However, its immunopathogenesis is not fully understood. Here, we investigated whether autoimmune encephalitis is associated with the human leukocyte antigen (HLA) subtypes. METHODS: We compared the HLA genotypes of 11 anti-LGI1 and 17 anti-NMDAR encephalitis patients to the control groups, which consisted of 210 epilepsy patients and 485 healthy Koreans...
December 27, 2016: Annals of Neurology
https://www.readbyqxmd.com/read/28018086/leukocyte-poor-platelet-rich-plasma-to-treat-degenerative-meniscal-tear-a-case-report
#11
J P Betancourt, W D Murrell
A traumatic and/or degenerative meniscus lesion is thought to be a clinical manifestation of early-onset osteoarthritis (OA), which is a chronic progressive condition that can cause substantial pain and disability. Platelet-rich plasma (PRP) is an emerging treatment option that has been reported to improve healing. Here, we present a case of a 29-year-old woman, with left anterior and medial knee pain, without history of trauma or injury. The patient was managed with leukocyte-poor PRP injections derived from her peripheral blood with high concentrations of platelets, platelet-derived growth factors, and bioactive proteins, with a total follow-up of 30 months...
October 2016: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/27932299/provisional-matrix-a-role-for-versican-and-hyaluronan
#12
REVIEW
Thomas N Wight
Hyaluronan and versican are extracellular matrix (ECM) components that are enriched in the provisional matrices that form during the early stages of development and disease. These two molecules interact to create pericellular "coats" and "open space" that facilitate cell sorting, proliferation, migration, and survival. Such complexes also impact the recruitment of leukocytes during development and in the early stages of disease. Once thought to be inert components of the ECM that help hold cells together, it is now quite clear that they play important roles in controlling cell phenotype, shaping tissue response to injury and maintaining tissue homeostasis...
December 6, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27932254/investigating-possible-biological-targets-of-bj-crp-the-first-cysteine-rich-secretory-protein-crisp-isolated-from-bothrops-jararaca-snake-venom
#13
Marina E Lodovicho, Tássia R Costa, Carolina P Bernardes, Danilo L Menaldo, Karina F Zoccal, Sante E Carone, José C Rosa, Manuela B Pucca, Felipe A Cerni, Eliane C Arantes, Jan Tytgat, Lúcia H Faccioli, Luciana S Pereira-Crott, Suely V Sampaio
Cysteine-rich secretory proteins (CRISPs) are commonly described as part of the protein content of snake venoms, nevertheless, so far, little is known about their biological targets and functions. Our study describes the isolation and characterization of Bj-CRP, the first CRISP isolated from Bothrops jararaca snake venom, also aiming at the identification of possible targets for its actions. Bj-CRP was purified using three chromatographic steps (Sephacryl S-200, Source 15Q and C18) and showed to be an acidic protein of 24...
January 4, 2017: Toxicology Letters
https://www.readbyqxmd.com/read/27919436/complement-in-basic-processes-of-the-cell
#14
Anaïs Jiménez-Reinoso, Ana V Marin, José R Regueiro
The complement system is reemerging in the last few years not only as key element of innate immunity against pathogens, but also as a main regulator of local adaptive responses, affecting dendritic cells as well as T and B lymphocytes. We review data showing that leucocytes are capable of significant autocrine synthesis of complement proteins, and express a large range of complement receptors, which in turn regulate their differentiation and effector functions while cross talking with other innate receptors such as Toll-like receptors...
December 2, 2016: Molecular Immunology
https://www.readbyqxmd.com/read/27900294/efficacy-of-autologous-leukocyte-reduced-platelet-rich-plasma-therapy-for-patellar-tendinopathy-in-a-rat-treadmill-model
#15
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/27886006/semi-automated-extraction-and-characterization-of-stromal-vascular-fraction-using-a-new-medical-device
#16
Alexander Hanke, Lukas Prantl, Carina Wenzel, Michael Nerlich, Gero Brockhoff, Markus Loibl, Sebastian Gehmert
INTRODUCTION: The stem cell rich Stromal Vascular Fraction (SVF) can be harvested by processing lipo-aspirate or fat tissue with an enzymatic digestion followed by centrifugation. To date neither a standardised extraction method for SVF nor a generally admitted protocol for cell application in patients exists. A novel commercially available semi-automated device for the extraction of SVF promises sterility, consistent results and usability in the clinical routine. The aim of this work was to compare the quantity and quality of the SVF between the new system and an established manual laboratory method...
2016: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/27878326/a-novel-72-kda-leukocyte-derived-osteoglycin-enhances-the-activation-of-toll-like-receptor-4-and-exacerbates-cardiac-inflammation-during-viral-myocarditis
#17
Marieke Rienks, Anna Papageorgiou, Kristiaan Wouters, Wouter Verhesen, Rick van Leeuwen, Paolo Carai, Georg Summer, Dirk Westermann, Stephane Heymans
BACKGROUND: Viral myocarditis can severely damage the myocardium through excessive infiltration of immune cells. Osteoglycin (OGN) is part of the small leucine-rich repeat proteoglycan (SLRP) family. SLRP's may affect inflammatory and fibrotic processes, but the implication of OGN in cardiac inflammation and the resulting injury upon viral myocarditis is unknown. METHODS AND RESULTS: This study uncovered a previously unidentified 72-kDa variant of OGN that is predominant in cardiac human and mouse samples of viral myocarditis...
November 23, 2016: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/27865272/proline-arginine-rich-pr-39-cathelicidin-structure-expression-and-functional-implication-in-intestinal-health
#18
REVIEW
Ravi Holani, Chaitanya Shah, Qahir Haji, G Douglas Inglis, Richard R E Uwiera, Eduardo R Cobo
Proline-Arginine-39 (PR-39) is a small cationic, proline and arginine rich, cathelicidin that plays an important role in the porcine innate immune system. Although PR-39 was first discovered in intestinal cell lysates of pigs, subsequent research has indicated that it is primarily expressed in bone marrow and other lymphoid tissues including the thymus and spleen, as well as in leukocytes. Mature PR-39 cathelicidin has anti-microbial activity against many gram-negative and some gram-positive bacteria. PR-39 is also a bridge between the innate and adaptive immune system with recognized immunomodulatory, wound healing, anti-apoptotic, and pro-angiogenic functions...
December 2016: Comparative Immunology, Microbiology and Infectious Diseases
https://www.readbyqxmd.com/read/27851941/antimicrobial-peptides-share-a-common-interaction-driven-by-membrane-line-tension-reduction
#19
J Michael Henderson, Alan J Waring, Frances Separovic, Ka Yee C Lee
Antimicrobial peptides (AMPs) are a class of host-defense molecules that neutralize a broad range of pathogens. Their membrane-permeabilizing behavior has been commonly attributed to the formation of pores; however, with the continuing discovery of AMPs, many are uncharacterized and their exact mechanism remains unknown. Using atomic force microscopy, we previously characterized the disruption of model membranes by protegrin-1 (PG-1), a cationic AMP from pig leukocytes. When incubated with zwitterionic membranes of dimyristoylphosphocholine, PG-1 first induced edge instability at low concentrations, then porous defects at intermediate concentrations, and finally worm-like micelle structures at high concentrations...
November 15, 2016: Biophysical Journal
https://www.readbyqxmd.com/read/27849108/influence-of-calcium-salts-and-bovine-thrombin-on-growth-factor-release-from-equine-platelet-rich-gel-supernatants
#20
Carlos E Giraldo, María E Álvarez, Jorge U Carmona
OBJECTIVE: To compare five activation methods in equine platelet-rich plasma (PRP) by determination of platelet-derived growth factor BB (PDGF-BB) and transforming growth factor beta 1 (TGF-β1) concentrations in platelet-rich gel (PRG) supernatants. METHODS: Platelet-rich plasma from 20 horses was activated by calcium chloride (CC), calcium gluconate (CG), bovine thrombin (BT), and their combinations, BTCC and BTCG. Both growth factor concentrations in PRG supernatants were measured by ELISA and compared with plasma and platelet lysates (PL) over time...
November 16, 2016: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
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