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https://www.readbyqxmd.com/read/28343356/development-of-a-novel-strategy-to-target-cd39-antithrombotic-activity-to-the-endothelial-platelet-microenvironment-in-kidney-ischemia-reperfusion-injury
#1
Maithili Sashindranath, Karen M Dwyer, Shala Dezfouli, Carly Selan, Sandra Crikis, Bo Lu, Yuping Yuan, Michael J Hickey, Karlheinz Peter, Simon C Robson, Peter J Cowan, Harshal H Nandurkar
Kidney ischemia-reperfusion injury (IRI) is common during transplantation. IRI is characterised by inflammation and thrombosis and associated with acute and chronic graft dysfunction. P-selectin and its ligand PSGL-1 are cell adhesion molecules that control leukocyte-endothelial and leukocyte-platelet interactions under inflammatory conditions. CD39 is the dominant vascular nucleotidase that facilitates adenosine generation via extracellular ATP/ADP-phosphohydrolysis. Adenosine signalling is protective in renal IRI, but CD39 catalytic activity is lost with exposure to oxidant stress...
March 25, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28337385/comparison-of-ticagrelor-and-high-dose-clopidogrel-on-the-platelet-functions-in-patients-with-inadequate-response-to-clopidogrel
#2
Xinshun Gu, Xianghua Fu, Yanbo Wang, Wenhui Zhang, Weize Fan, Yunfa Jiang, Guozhen Hao, Qing Miao, Yi Li, Wei Zhi
OBJECTIVE: To evaluate the effects of ticagrelor and high-dose clopidogrel on the platelet functions in patients with inadequate response to clopidogrel. METHODS: In this prospective, randomized and controlled study, patients who had been diagnosed as acute coronary syndrome (ACS) with inadequate response to clopidogrel in the Second Hospital of Hebei Medical University from July 2015 to June 2016 were enrolled. Inadequate response to clopidogrel was defined as absolute reduction of platelet aggregation rate (PAR) <30% or PAR >70%...
2017: American Journal of Cardiovascular Disease
https://www.readbyqxmd.com/read/28334045/plasma-soluble-l-selectin-in-medicated-patients-with-schizophrenia-and-healthy-controls
#3
Satyajit Mohite, Fang Yang, Pooja A Amin, Giovana Zunta-Soares, Gabriela D Colpo, Laura Stertz, Ajaykumar N Sharma, Gabriel R Fries, Consuelo Walss-Bass, Jair C Soares, Olaoluwa O Okusaga
Immune dysfunction has been implicated in the pathophysiology of schizophrenia. Leukocyte migration to the site of inflammation is a fundamental step of immune response which involves P-, E-, and L-selectins. Elevated selectin levels have been reported in un-medicated first-episode patients with schizophrenia but not in medicated patients with multi-episode schizophrenia. We measured fasting plasma soluble P-, E-, and L-selectin in 39 medicated patients with multi-episode schizophrenia and 19 healthy controls...
2017: PloS One
https://www.readbyqxmd.com/read/28333093/the-effect-of-regular-intake-of-dry-cured-ham-rich-in-bioactive-peptides-on-inflammation-platelet-and-monocyte-activation-markers-in-humans
#4
Sara María Martínez-Sánchez, Alfredo Minguela, David Prieto-Merino, María Pilar Zafrilla-Rentero, José Abellán-Alemán, Silvia Montoro-García
Background and aims: Dietary studies have shown that active biopeptides provide protective health benefits, although the mediating pathways are somewhat uncertain. To throw light on this situation, we studied the effects of consuming Spanish dry-cured ham on platelet function, monocyte activation markers and the inflammatory status of healthy humans with pre-hypertension. Methods: Thirty-eight healthy volunteers with systolic blood pressure of >125 mmHg were enrolled in a two-arm crossover randomized controlled trial...
March 23, 2017: Nutrients
https://www.readbyqxmd.com/read/28330896/cell-specific-variation-in-e-selectin-ligand-expression-among-human-peripheral-blood-mononuclear-cells-implications-for-immunosurveillance-and-pathobiology
#5
Mariana Silva, Ronald Kam Fai Fung, Conor Brian Donnelly, Paula Alexandra Videira, Robert Sackstein
Both host defense and immunopathology are shaped by the ordered recruitment of circulating leukocytes to affected sites, a process initiated by binding of blood-borne cells to E-selectin displayed at target endothelial beds. Accordingly, knowledge of the expression and function of leukocyte E-selectin ligands is key to understanding the tempo and specificity of immunoreactivity. In this study, we performed E-selectin adherence assays under hemodynamic flow conditions coupled with flow cytometry and Western blot analysis to elucidate the function and structural biology of glycoprotein E-selectin ligands expressed on human PBMCs...
March 22, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28327146/association-between-obstructive-sleep-apnea-severity-and-endothelial-dysfunction-in-patients-with-type-2-diabetes
#6
Vanessa Bironneau, François Goupil, Pierre Henri Ducluzeau, Marc Le Vaillant, Pierre Abraham, Samir Henni, Séverine Dubois, Audrey Paris, Pascaline Priou, Nicole Meslier, Claire Sanguin, Wojciech Trzépizur, Ramaroson Andriantsitohaina, Maria Carmen Martinez, Frédéric Gagnadoux
BACKGROUND: Obstructive sleep apnea (OSA) and type 2 diabetes (T2D) are associated with endothelial dysfunction a main predictor of late cardiovascular (CV) events. Despite the high prevalence of OSA in patients with T2D, the impact of OSA severity on endothelial function has not been clearly elucidated. The aim of this cross-sectional study was to determine whether increasing OSA severity is associated with poorer endothelial function in patients with T2D. METHODS: 140 patients with T2D and no overt CV disease underwent polysomnography, peripheral arterial tonometry, clinic blood pressure (BP) measurement, biological assessment for CV risk factors, daytime sleepiness and health related quality of life (HRQL) questionnaires...
March 21, 2017: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/28319824/effect-of-long-term-remote-ischaemic-conditioning-on-platelet-function-and-fibrinolysis-in-patients-with-chronic-ischaemic-heart-failure
#7
Kasper Pryds, Jacobina Kristiansen, Søs Neergaard-Petersen, Roni R Nielsen, Michael R Schmidt, Jens Refsgaard, Steen D Kristensen, Hans Erik Bøtker, Anne-Mette Hvas, Erik L Grove
INTRODUCTION: Remote ischaemic conditioning (RIC) protects against ischaemia-reperfusion injury through cellular protective pathways, but may also modulate haemostasis. We aimed to investigate the effect of long-term RIC on platelet function and fibrinolysis in patients with chronic ischaemic heart failure (CIHF). MATERIAL AND METHODS: In a prospective, outcome-assessor blinded, paired study, 16 patients with CIHF and 21 age- and gender-matched controls without ischaemic heart disease (IHD) were treated with RIC once daily for 28±4days...
March 10, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28319748/modulation-of-vascular-function-and-anti-aggregation-effect-induced-by-1%C3%A2-3-1%C3%A2-6-%C3%AE-d-glucan-of-saccharomyces-cerevisiae-and-its-carboxymethylated-derivative-in-rats
#8
Lorena Soares Bezerra, Marciane Magnani, Raul Jorge Hernan Castro-Gomez, Hassler Clementino Cavalcante, Tays Amanda Felisberto da Silva, Renata Layne Paixão Vieira, Isac Almeida de Medeiros, Robson Cavalcante Veras
BACKGROUND: β-d-Glucans are polysaccharides found in the cell walls of yeasts, such as Saccharomyces cerevisiae, and they have been studied because of their beneficial effects on health, mainly in terms of immunomodulation. However, information on the action of these polymers on vascular and platelet function is still scarce. This study evaluate the effect of (1→3) (1→6) β-d-glucan (βG-Sc) and its carboxymethylated derivative (CM-G) on vascular and platelet function in rats. METHODS: The animals received daily oral treatments with βG-Sc (20mg/kg) and CM-G (20mg/kg) for eight days...
January 12, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28318371/p-selectin-endocan-and-some-adhesion-molecules-in-obese-children-and-adolescents-with-non-alcoholic-fatty-liver-disease
#9
Ala Ustyol, Esra Aycan Ustyol, Figen Gurdol, Funda Kokali, Seldag Bekpınar
There is increasing evidence for a direct relationship between the vascular system and non-alcoholic fatty liver disease (NAFLD). The aim of this study was to investigate endocan and adhesion molecules such as P-selectin derived from the endothelium and platelets in obese children and adolescents with NAFLD. One hundred obese patients and 40 lean controls were enrolled. The obese subjects were divided into two subgroups based on the presence or absence of fatty liver. Blood samples were assayed for endocan, P-selectin, platelet-derived growth factor (PDGF), intercellular cell adhesion molecule (ICAM)-1, and vascular cell adhesion molecule (VCAM)-1...
May 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/28316983/endovenous-laser-ablation-of-varicose-veins-preserves-biological-properties-of-vascular-endothelium-and-modulates-proinflammatory-agent-profile-more-favorably-than-classic-vein-stripping
#10
Paweł Uruski, Krzysztof Aniukiewicz, Justyna Mikuła-Pietrasik, Patrycja Sosińska, Andrzej Tykarski, Krzysztof Książek, Zbigniew Krasiński
Here we compared effect of serum from varicose patients undergoing endovenous laser ablation (EVLA) and classic vein stripping (CVS) on biological properties of endothelial cells and on the local and systemic profiles of proinflammatory agents. Results showed that serum from EVLA patients improved proliferation and reduced senescence and oxidative stress in the endothelial cells, as compared with the serum from CVS patients. These effects were related to a suppressed activity of TGF-β1, the level of which in the serum from the EVLA patients was decreased...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28316004/effect-of-the-fxa-inhibitors-rivaroxaban-and-apixaban-on-platelet-activation-in-patients-with-atrial-fibrillation
#11
B Steppich, F Dobler, L C Brendel, G Hessling, S L Braun, A L Steinsiek, I Deisenhofer, A Hyseni, M Roest, I Ott
Rivaroxaban and Apixaban, increasingly used for stroke prevention in non-valvular atrial fibrillation (AF), might impact platelet reactivity directly or indirectly. By inhibition of Factor Xa (FXa) they preclude not only generation of relevant thrombin amounts but also block signalling of FXa via protease activated receptors. However, weather FXa-inhibition affects platelet haemostasis remains incompletely known. One hundred and twenty-eight patients with AF on chronic anticoagulation with either Rivaroxaban or Apixaban for at least 4 weeks were included in the study...
March 18, 2017: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/28314136/platelet-microparticle-inspired-clot-responsive-nanomedicine-for-targeted-fibrinolysis
#12
Christa L Pawlowski, Wei Li, Michael Sun, Kavya Ravichandran, DaShawn Hickman, Clarissa Kos, Gurbani Kaur, Anirban Sen Gupta
Intravascular administration of plasminogen activators is a clinically important thrombolytic strategy to treat occlusive vascular conditions. A major issue with this strategy is the systemic off-target drug action, which affects hemostatic capabilities and causes substantial hemorrhagic risks. This issue can be potentially resolved by designing technologies that allow thrombus-targeted delivery and site-specific action of thrombolytic drugs. To this end, leveraging a liposomal platform, we have developed platelet microparticle (PMP)-inspired nanovesicles (PMINs), that can protect encapsulated thrombolytic drugs in circulation to prevent off-target uptake and action, anchor actively onto thrombus via PMP-relevant molecular mechanisms and allow drug release via thrombus-relevant enzymatic trigger...
March 14, 2017: Biomaterials
https://www.readbyqxmd.com/read/28306666/new-biomarkers-and-imaging-approaches-for-the-diagnosis-of-deep-venous-thrombosis
#13
Jordan K Schaefer, Benjamin Jacobs, Thomas W Wakefield, Suman L Sood
PURPOSE OF REVIEW: Symptoms suggestive of deep vein thrombosis (DVT) are extremely common in clinical practice, but unfortunately nonspecific. In both ambulatory and inpatient settings, clinicians are often tasked with evaluating these concerns. Here, we review the most recent advances in biomarkers and imaging to diagnose lower extremity DVT. RECENT FINDINGS: The modified Wells score remains the most supported clinical decision rule for risk stratifying patients...
March 16, 2017: Current Opinion in Hematology
https://www.readbyqxmd.com/read/28306627/novel-microspheres-reduce-the-formation-of-deep-venous-thrombosis-and-repair-the-vascular-wall-in-a-rat-model
#14
Bingyang Dai, Lan Li, Qiangqiang Li, Xiaoxiao Song, Dongyang Chen, Jin Dai, Yao Yao, Wenjin Yan, Huajian Teng, Fang Yang, Zhihong Xu, Qing Jiang
L-Arginine (L-arg), widely known as a substrate for endogenous nitric oxide synthesis, can improve endothelial function associated with the vasculature, inhibit platelet aggregation, and alter the activity of vascular smooth muscle cells. P-selectin is a membrane component of the platelet alpha-granule and the endothelial cell-specific Wiebel-Palade body that plays a central role in mediating interactions between platelets and both leukocytes and the endothelium. The experiment was designed to evaluate the effect of novel microspheres with L-arg targeting P-selectin on the formation of deep vein thrombosis and repair of vascular wall in a rat model...
March 16, 2017: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
https://www.readbyqxmd.com/read/28302997/platelets-cellular-and-functional-characteristics-in-patients-with-atrial-fibrillation-a-comprehensive-meta-analysis-and-systematic-review
#15
Alexander Weymann, Sadeq Ali-Hasan-Al-Saegh, Anton Sabashnikov, Aron-Frederik Popov, Seyed Jalil Mirhosseini, Luis Nombela-Franco, Luca Testa, Mohammadreza Lotfaliani, Mohamed Zeriouh, Tong Liu, Hamidreza Dehghan, Senol Yavuz, Michel Pompeu Barros de Oliveira Sá, William L Baker, Jae-Sik Jang, Mengqi Gong, Umberto Benedetto, Pascal M Dohmen, Fabrizio D'Ascenzo, Abhishek J Deshmukh, Giuseppe Biondi-Zoccai, Hugh Calkins, Gregg W Stone, Integrated Meta-Analysis Of Cardiac Surgery And Cardiology-Group Imcsc-Group
BACKGROUND This systematic review with meta-analysis aimed to determine the strength of evidence for evaluating the association of platelet cellular and functional characteristics including platelet count (PC), MPV, platelet distribution width (PDW), platelet factor 4, beta thromboglobulin (BTG), and p-selectin with the occurrence of atrial fibrillation (AF) and consequent stroke. MATERIAL AND METHODS We conducted a meta-analysis of observational studies evaluating platelet characteristics in patients with paroxysmal, persistent and permanent atrial fibrillations...
March 17, 2017: Medical Science Monitor Basic Research
https://www.readbyqxmd.com/read/28300459/mildly-elevated-unconjugated-bilirubin-is-associated-with-reduced-platelet-activation-related-thrombogenesis-and-inflammation-in-gilbert-s-syndrome
#16
Avinash R Kundur, Abishek B Santhakumar, Andrew C Bulmer, Indu Singh
Gilbert's syndrome (GS) is associated with a mild unconjugated hyperbilirubinemia, increased circulating antioxidant capacity, and reduced cardiovascular disease (CVD) risk. The current study investigated whether mildly elevated circulating unconjugated bilirubin (UCB) is negatively associated with multiple thrombotic risk factors including platelet activity, hemostatic function, and inflammation in individuals with GS. Blood samples were collected from matched GS and control subjects (14 per group). Activation-dependent platelet surface marker expression of PAC-1 (binds to GPIIb/IIIa surface receptors on activated platelets) and CD62P (marker for P-selectin released from activated degranulated platelets) was assessed in adenosine diphosphate (ADP)-stimulated platelets using flow cytometry...
March 16, 2017: Platelets
https://www.readbyqxmd.com/read/28296243/measurement-of-platelet-aggregation-independent-of-patient-platelet-count-a-flow-cytometric-approach
#17
Pernille Just Vinholt, Henrik Frederiksen, Anne-Mette Hvas, Ulrik Sprogøe, Christian Nielsen
BACKGROUND: Methods for testing platelet aggregation in thrombocytopenia are missing. OBJECTIVE: To establish a flow cytometric test of in vitro platelet aggregation independent of the patient platelet count and examined the association of aggregation with bleeding history in thrombocytopenic patients. PATIENTS/METHODS: We established a flow cytometric assay of platelet aggregation and measured samples from healthy individuals pre-incubated with antiplatelet drugs and samples from two patients with inherited platelet disorders...
March 15, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28288411/vitexin-alleviates-ox-ldl-mediated-endothelial-injury-by-inducing-autophagy-via-ampk-signaling-activation
#18
Shaoli Zhang, Changlei Guo, Zhigang Chen, Peiyong Zhang, Jianhua Li, Yan Li
Endothelial cell injury plays a crucial role in the development and pathogenesis of cardiovascular disease. Vitexin is a natural flavonoid characterized by anti-oxidative and anti-inflammatory properties. The purpose of this study was to investigate the effects of vitexin on ox-LDL-induced endothelial dysfunction and to explore the underlying molecular mechanisms. In the present study, vitexin was found to play a protective role against ox-LDL-induced endothelial injury. Vitexin significantly promoted cell viability and inhibited apoptosis in ox-LDL-treated HUVECs...
March 10, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28287031/comparison-of-diverse-platelet-activation-markers-as-indicators-for-left-atrial-thrombus-in-atrial-fibrillation
#19
Daniel Tarnowski, David M Poitz, Lina Plichta, Felix M Heidrich, Stephan Wiedemann, Tobias Ruf, Johannes Mierke, Tobias Löhn, Stefanie Jellinghaus, Ruth H Strasser, Karim Ibrahim, Christian Pfluecke
Atrial fibrillation (AF) is well known for being a major risk factor of thromboembolic stroke. We could recently demonstrate an association of monocyte-platelet aggregates (MPAs) with the degree of thrombogenicity in patients with AF. This study investigated platelet activation markers, as potential biomarkers for the presence of left atrial (LA) thrombus in patients with AF. One hundred and eight patients with symptomatic AF underwent transesophageal echocardiography (TEE) before scheduled cardioversion or pulmonary vein isolation...
March 13, 2017: Platelets
https://www.readbyqxmd.com/read/28285654/gut-microbiota-interactions-with-the-immunomodulatory-role-of-vitamin-d-in-normal-individuals
#20
Renata V Luthold, Gabriel R Fernandes, Ana Carolina Franco-de-Moraes, Luciana G D Folchetti, Sandra Roberta G Ferreira
BACKGROUND: Due to immunomodulatory properties, vitamin D status has been implicated in several diseases beyond the skeletal disorders. There is evidence that its deficiency deteriorates the gut barrier favoring translocation of endotoxins into the circulation and systemic inflammation. Few studies investigated whether the relationship between vitamin D status and metabolic disorders would be mediated by the gut microbiota composition. OBJECTIVE: We examined the association between vitamin D intake and circulating levels of 25(OH)D with gut microbiota composition, inflammatory markers and biochemical profile in healthy individuals...
April 2017: Metabolism: Clinical and Experimental
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