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https://www.readbyqxmd.com/read/28635382/white-cell-and-platelet-content-affects-the-release-of-bioactive-factors-in-different-blood-derived-scaffolds
#1
S Cabaro, V D'Esposito, R Gasparro, F Borriello, F Granata, G Mosca, F Passaretti, J C Sammartino, F Riccitiello, F Beguinot, P Formisano, G Sammartino
Platelet-derived factors are biomaterials that might accelerate healing process in oral, maxillofacial, and several other applications. Release of specific factors by platelet concentrates is critical to achieving a successful outcome. Here, we have shown that platelet-rich fibrin (PRF) clots were beneficial sources of leukocytes, which may directly affect the release of chemokines and growth factors. When compared with the standard leukocyte-PRF (L-PRF), the experimental low-force modified procedure [defined as advanced-PRF (A-PRF)] entrapped the same content of viable leukocytes, released a similar amount of inflammatory cytokines, but secreted 3-, 1...
June 21, 2017: Platelets
https://www.readbyqxmd.com/read/28591543/influence-of-polyphenol-rich-diet-on-exercise-induced-immunomodulation-in-male-endurance-athletes
#2
Korbinian Lackermair, Johannes Scherr, Georg Waidhauser, Heiko Methe, Eva Hoster, David C Nieman, Alan Hanley, Sebastian Clauss, Martin Halle, Thomas Nickel
<u>Introduction:</u> Stress is associated with increased susceptibility to infection. We investigated if the mechanism involves immunomodulation of dendritic cells and whether this can be inhibited by a polyphenol-rich diet. <u>Methods:</u> Blood samples were taken from a total of 100 male endurance athletes at five time points around a marathon run: four weeks before, during one week before, and immediately, 24hours and 72hours after. Participants were randomized into two double blinded groups...
June 7, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28582593/secreted-protein-acidic-and-rich-in-cysteine-functions-in-colitis-via-il17a-regulation-in-mucosal-cd4-t-cells
#3
Makoto Tanaka, Tomohisa Takagi, Yuji Naito, Kazuhiko Uchiyama, Yuma Hotta, Yuki Toyokawa, Chihiro Ushiroda, Yasuko Hirai, Wataru Aoi, Yasuki Higashimura, Katsura Mizushima, Tetsuya Okayama, Kazuhiro Katada, Kazuhiro Kamada, Takeshi Ishikawa, Osamu Handa, Yoshito Itoh
BACKGROUND AND AIM: Secreted protein acidic and rich in cysteine (SPARC) is a matricellular glycol that regulates cell proliferation, tissue repair, and tumorigenesis. Despite evidence linking SPARC to inflammation, the mechanisms are unclear. Accordingly, the role of SPARC in intestinal inflammation was investigated. METHODS: Colitis was induced in wild-type (WT) and SPARC knockout (KO) mice using trinitrobenzene sulfonic acid (TNBS). Colons were assessed for damage, leukocyte infiltration, Tnf, Ifng, Il17a, and Il10 mRNA expression, and histology...
June 5, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28568283/the-lungs-of-polypterus-senegalus-and-erpetoichthys-calabaricus-insights-into-the-structure-and-functional-distribution-of-the-pulmonary-epithelial-cells
#4
José M Icardo, Elvira Colvee, Michal Kuciel, Eugenia R Lauriano, Giacomo Zaccone
The present article is a comparative, structural study of the lung of Polypterus senegalus and Erpetoichthys calabaricus, two species representative of the two genera that constitute the Polypteriformes. The lung of the two species is an asymmetric, bi-lobed organ that arises from a slit-like opening in the ventral side of the pharynx. The wall is organized into layers, being thicker in P. senegalus. The inner epithelium contains ciliated and non-ciliated bands. The latter constitute the respiratory surface and are wider in E...
May 31, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28560233/evolution-current-status-and-advances-in-application-of-platelet-concentrate-in-periodontics-and-implantology
#5
REVIEW
Amit Arvind Agrawal
Platelet concentrates (PC) [platelet-rich plasma (PRP) and platelet-rich fibrin (PRF)] are frequently used for surgical procedures in medical and dental fields, particularly in oral and maxillofacial surgery, plastic surgery and sports medicine. The objective of all these technologies is to extract all the elements from a blood sample that could be used to improve healing and promote tissue regeneration. Although leukocyte rich and leukocyte poor PRP's have their own place in literature, the importance of non-platelet components in a platelet concentrate remains a mystery...
May 16, 2017: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/28536942/lrrc25-plays-a-key-role-in-all-trans-retinoic-acid-induced-granulocytic-differentiation-as-a-novel-potential-leukocyte-differentiation-antigen
#6
Weili Liu, Ting Li, Pingzhang Wang, Wanchang Liu, Fujun Liu, Xiaoning Mo, Zhengyang Liu, Quansheng Song, Ping Lv, Guorui Ruan, Wenling Han
Leukocyte differentiation antigens (LDAs) play important roles in the immune system, by serving as surface markers and participating in multiple biological activities, such as recognizing pathogens, mediating membrane signals, interacting with other cells or systems, and regulating cell differentiation and activation. Data mining is a powerful tool used to identify novel LDAs from whole genome. LRRC25 (leucine rich repeat-containing 25) was predicted to have a role in the function of myeloid cells by a large-scale "omics" data analysis...
May 23, 2017: Protein & Cell
https://www.readbyqxmd.com/read/28532438/the-effect-of-color-type-on-early-wound-healing-in-farmed-mink-neovison-vison
#7
A Jespersen, H E Jensen, J F Agger, P M H Heegaard, P Damborg, B Aalbæk, A S Hammer
BACKGROUND: Individual differences of mink, including color type, are speculated to affect the course of wound healing, thereby impacting wound assessment and management on the farms, as well as the assessment of wounds in forensic cases. In this study, we examined the effect of color type on early wound healing in farmed mink. Full thickness excisional wounds (2 × 2 cm) were made on the back in 18 mink of the color types Brown, Silverblue and Blue Iris. Gross and microscopic pathology of the wounds was evaluated 2 days post-wounding together with degree of wound size reduction, presence of bacteria and blood analyses...
May 22, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28520812/the-effect-of-platelet-rich-plasma-on-osseous-healing-in-dogs-undergoing-high-tibial-osteotomy
#8
Samuel P Franklin, Emily E Burke, Shannon P Holmes
OBJECTIVES: The purpose of this study was to investigate whether platelet-rich plasma (PRP) enhances osseous healing in conjunction with a high tibial osteotomy in dogs. STUDY DESIGN: Randomized controlled trial. METHODS: Sixty-four client-owned pet dogs with naturally occurring rupture of the anterior cruciate ligament and that were to be treated with a high tibial osteotomy (tibial plateau leveling osteotomy) were randomized into the treatment or control group...
2017: PloS One
https://www.readbyqxmd.com/read/28509690/genetics-and-its-potential-to-improve-type-1-diabetes-care
#9
Stephen S Rich
PURPOSE OF REVIEW: The genetic basis of type 1 diabetes (T1D) is being characterized through DNA sequence variation and cell type specificity. This review discusses the current understanding of the genes and variants implicated in risk of T1D and how genetic information can be used in prediction, intervention and components of clinical care. RECENT FINDINGS: Fine mapping and functional studies has provided resolution of the heritable basis of T1D risk, incorporating novel insights on the dominant role of human leukocyte antigen (HLA) genes as well as the lesser impact of non-HLA genes...
May 15, 2017: Current Opinion in Endocrinology, Diabetes, and Obesity
https://www.readbyqxmd.com/read/28509340/prf-based-matrices-to-improve-angiogenesis-in-an-in-vitro-co-culture-model-for-bone-tissue-engineering
#10
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/28509332/myeloid-but-not-epithelial-tissue-factor-exerts-protective-anti-inflammatory-properties-in-acid-aspiration-induced-acute-lung-injury
#11
J B Kral-Pointner, W C Schrottmaier, V Horvath, H Datler, L Hell, C Ay, B Niederreiter, B Jilma, J A Schmid, A Assinger, N Mackman, S Knapp, G Schabbauer
INTRODUCTION: Acute lung injury (ALI) is a life-threatening condition characterized by damaged alveolar-capillary structures and activation of inflammatory and hemostatic processes. Tissue factor (TF) represents a crucial link between inflammation and coagulation, as inflammatory mediators induce myeloid TF expression and TF initiates the extrinsic coagulation. OBJECTIVE: Since pulmonary inflammation stimulates TF expression and TF modulates immune responses, we aimed to elucidate its impact on ALI...
May 16, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28503993/dual-inhibition-of-pi3k-and-mtor-by-vs-5584-suppresses-thrombus-formation
#12
Thomas Später, Isabelle Müller, Hermann Eichler, Michael D Menger, Matthias W Laschke, Emmanuel Ampofo
VS-5584 is a highly selective dual kinase inhibitor which suppresses phosphatidylinositol 3-kinase (PI3K) and mammalian target of rapamycin (mTOR) activity. Because these kinases are crucially involved in primary hemostasis, we herein investigated the effect of this compound on thrombus formation in vitro and in vivo. Pretreatment of washed platelets (WP) or platelet-rich plasma (PRP) with VS-5584 inhibited the agonist-induced activation of surface glycoprotein complex (GP)IIb/IIIa and the upregulation of P-selectin...
May 15, 2017: Platelets
https://www.readbyqxmd.com/read/28486940/binding-of-plasmodium-falciparum-to-cd36-can-be-shielded-by-the-glycocalyx
#13
Casper Hempel, Christian William Wang, Jørgen Anders Lindholm Kurtzhals, Trine Staalsø
BACKGROUND: Plasmodium falciparum-infected erythrocytes sequester in the microcirculation due to interaction between surface-expressed parasite proteins and endothelial receptors. Endothelial cells are covered in a carbohydrate-rich glycocalyx that shields against undesired leukocyte adhesion. It was investigated if the cellular glycocalyx affects the binding of P. falciparum-infected erythrocytes to CD36 in vitro. METHODS: Glycocalyx growth was followed in vitro by using azido sugars and cationized ferritin detecting O-glycoproteins and negatively charged proteoglycans, respectively...
May 10, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28455498/grb2-carboxyl-terminal-sh3-domain-can-bivalently-associate-with-two-ligands-in-an-sh3-dependent-manner
#14
Richa Arya, Rohit Singh Dangi, Pinakin K Makwana, Ambrish Kumar, Santosh Kumar Upadhyay, Monica Sundd
Src homology domain containing leukocyte protein of 65 kDa (SLP65), the growth factor receptor binding protein 2 (Grb2), and the guanine nucleotide exchange factor for the Rho family GTPases (Vav), self associate in unstimulated B cells as components of the preformed B cell receptor transducer module, in an SH3-dependent manner. The complex enables the B cell to promptly respond to BCR aggregation, resulting in signal amplification. It also facilitates Vav translocation to the membrane rafts, for activation...
April 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28453727/endothelial-glycocalyx-breakdown-is-mediated-by-angiopoietin-2
#15
Alexander Lukasz, Carina Hillgruber, Hans Oberleithner, Kristina Kusche-Vihrog, Hermann Pavenstädt, Alexandros Rovas, Bettina Hesse, Tobias Goerge, Philipp Kümpers
Aims: The endothelial glycocalyx (eGC), a carbohydrate-rich layer lining the luminal surface of the endothelium, provides a first vasoprotective barrier against vascular leakage and adhesion in sepsis and vessel inflammation. Angiopoietin-2 (Angpt-2), an antagonist of the endothelium-stabilizing receptor Tie2 secreted by endothelial cells, promotes vascular permeability through cellular contraction and junctional disintegration. We hypothesized that Angpt-2 might also mediate the breakdown of the eGC...
May 1, 2017: Cardiovascular Research
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
#16
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
https://www.readbyqxmd.com/read/28424777/influence-of-cellular-composition-and-exogenous-activation-on-growth-factor-and-cytokine-concentrations-in-canine-platelet-rich-plasmas
#17
Samuel P Franklin, Kate E Birdwhistell, Alena Strelchik, Bridget C Garner, Benjamin M Brainard
OBJECTIVE: The purposes of this study were to (1) evaluate correlations among platelet, leukocyte, growth factor, and cytokine concentrations in canine platelet-rich plasmas (PRPs) produced from five different canine PRP-concentrating systems and (2) compare the effects of different activation protocols on platelet activation and growth factor release from one of these PRPs. METHODS: PRP was made using blood from 15 dogs and each of 5 different PRP systems in a cross-over design...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28401929/the-effect-of-l-prf-membranes-on-bone-healing-in-rabbit-tibiae-bone-defects-micro-ct-and-biomarker-results
#18
Fernanda Faot, Sanne Deprez, Katleen Vandamme, Germana V Camargos, Nelson Pinto, Jasper Wouters, Joost van den Oord, Marc Quirynen, Joke Duyck
More insight into the biological fundamentals of leukocyte platelet-rich fibrin (L-PRF) guided healing is necessary to recommend its application, in particular in deficient bone sites that need to support implants. This study investigated the short-term bone healing effect of L-PRF treatment in cylindrical non-critical sized bone defects with 3 mm diameter and 6 mm depth in tibiae of 18 adult male New Zealand White rabbits. After a randomization process, 96 bone defects were prepared and half of them were filled with a L-PRF membrane, while untreated defects in the opposite tibia served as control group...
April 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28375975/autologous-pure-platelet-rich-plasma-dermal-injections-for-facial-skin-rejuvenation-clinical-instrumental-and-flow-cytometry-assessment
#19
Norma Cameli, Maria Mariano, Iole Cordone, Elva Abril, Serena Masi, Maria Laura Foddai
BACKGROUND: Platelet-rich plasma (PRP) is an emerging treatment in dermatology recently proposed for skin rejuvenation. OBJECTIVE: To evaluate the efficacy and safety of autologous pure PRP dermal injections on facial skin rejuvenation, investigating the cellularity of PRP samples. MATERIALS AND METHODS: Twelve patients underwent 3 sessions of PRP injection at 1-month intervals. The clinical and instrumental outcomes were evaluated before (T0) and 1 month (T1) after the end of treatment by means of transepidermal water loss, corneometry, Cutometer, Visioscan, and Visioface...
June 2017: Dermatologic Surgery: Official Publication for American Society for Dermatologic Surgery [et Al.]
https://www.readbyqxmd.com/read/28367492/analgesic-anti-inflammatory-and-antioxidant-activities-of-byrsonima-duckeana-w-r-anderson-malpighiaceae
#20
Maria Christina Dos Santos Verdam, Fernanda Guilhon-Simplicio, Kleyton Cardoso de Andrade, Karina Lorena Meira Fernandes, Tallita Marques Machado, Felipe Moura Araújo da Silva, Mayane Pereira de Souza, Hector Henrique Ferreira Koolen, Cristiane da Silva Paula, Beatriz Cristina Konopatzki Hirota, Vinícius Bednarczuk de Oliveira, Cristina Mayumi Sasaki Miyazaki, Milena Kalegari, Marilis Dallarmi Miguel, Patricia Maria Stuelp-Campelo, Obdulio Gomes Miguel
Background. Byrsonima is a promising neotropical genus, rich in flavonoids and triterpenes, with several proven pharmacological properties. Nevertheless, Byrsonima duckeana W. R. Anderson is an Amazonian species almost not studied. Objective. To assess the antioxidant, anti-inflammatory, and analgesic activities of Byrsonima duckeana leaves. Materials and Methods. We analyzed an ethanol extract and its fractions for polyphenol content and UHPLC-MS/MS, phosphomolybdenum, DPPH, TBARS antioxidant tests, formalin-induced pain, carrageenan-induced peritonitis, acetic acid-induced abdominal writhings, and hot plate assays...
2017: TheScientificWorldJournal
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