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https://www.readbyqxmd.com/read/28436258/thrombopoietin-and-platelet-aggregation-in-patients-with-stable-coronary-artery-disease
#1
Sanne Bøjet Larsen, Erik Lerkevang Grove, Søs Neergaard-Petersen, Morten Würtz, Anne-Mette Hvas, Steen Dalby Kristensen
Thrombopoietin (TPO) may facilitate platelet activation and aggregation. However, data on the impact of TPO on platelet aggregation in patients with stable coronary artery disease (CAD) are scarce. We aimed to investigate associations between TPO and platelet aggregation and activation in patients with stable coronary artery disease (CAD). We studied 900 stable CAD patients. Serum TPO was assessed by ELISA. Platelet aggregation was evaluated using the Multiplate Analyzer (agonists: arachidonic acid [AA] and collagen) and the VerifyNow Aspirin Assay...
April 24, 2017: Platelets
https://www.readbyqxmd.com/read/28432984/cigarette-smoke-extract-counteracts-atheroprotective-effects-of-high-laminar-flow-on-endothelial-function
#2
Sindy Giebe, Natalia Cockcroft, Katherine Hewitt, Melanie Brux, Anja Hofmann, Henning Morawietz, Coy Brunssen
Tobacco smoking and hemodynamic forces are key stimuli in the development of endothelial dysfunction and atherosclerosis. High laminar flow has an atheroprotective effect on the endothelium and leads to a reduced response of endothelial cells to cardiovascular risk factors compared to regions with disturbed or low laminar flow. We hypothesize that the atheroprotective effect of high laminar flow could delay the development of endothelial dysfunction caused by cigarette smoking. Primary human endothelial cells were stimulated with increasing dosages of aqueous cigarette smoke extract (CSEaq)...
April 7, 2017: Redox Biology
https://www.readbyqxmd.com/read/28431467/influence-of-glycosylation-on-interfacial-properties-of-recombinant-mucins-adsorption-surface-forces-and-friction
#3
Junxue An, Chunsheng Jin, Andra Dédinaité, Jan Holgersson, Niclas G Karlsson, Per Martin Claesson
Interfacial properties of two brush-with-anchor mucins, C-P55 and C-PSLex, have been investigated at the aqueous solution/poly(methylmethacrylate) (PMMA) interface. Both are recombinant mucin-type fusion proteins, produced by fusing the glycosylated mucin part of P-selectin glycoprotein ligand-1 (PSLG-1) to the Fc part of a mouse immunoglobulin in two different cells. They are mainly expressed as dimers upon production. Analysis of the O-glycans shows that the C-PSLex mucin has the longer and more branched side chains, but C-P55 has slightly higher sialic acid content...
April 21, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28430714/ultrasound-molecular-imaging-of-inflammation-in-mouse-abdominal-aorta
#4
Shiying Wang, Sunil Unnikrishnan, Elizabeth B Herbst, Alexander L Klibanov, Frank William Mauldin, John A Hossack
OBJECTIVES: The aim of this study was to demonstrate a new clinically translatable ultrasound molecular imaging approach, modulated acoustic radiation force-based imaging, which is capable of rapid and reliable detection of inflammation as validated in mouse abdominal aorta. MATERIALS AND METHODS: Animal studies were approved by the Institutional Animal Care and Use Committee at the University of Virginia. C57BL/6 mice stimulated with tumor necrosis factor α, or fed with a high-fat diet, were used as inflammation (MInflammation) and diet-induced obesity (DIO) (MDIO) models, respectively...
April 20, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28430671/elevated-production-of-nociceptive-cc-chemokines-and-se-selectin-in-patients-with-low-back-pain-and-the-effects-of-spinal-manipulation-a-non-randomized-clinical-trial
#5
Julita A Teodorczyk-Injeyan, Marion McGregor, John J Triano, H Stephen Injeyan
BACKGROUND: The involvement of inflammatory components in the pathophysiology of low back pain is poorly understood. It has been suggested that spinal manipulative therapy (SMT) may exert anti-inflammatory effects. PURPOSE: To determine the involvement of inflammation-associated chemokines (CC series) in the pathogenesis of non-specific low back pain and to evaluate the effect of SMT on that process. METHODS: Patients presenting with non-radicular, non-specific low back pain (minimum pain score 3 on 10 point visual analogue scale, VAS) were recruited according to stringent inclusion criteria...
April 19, 2017: Clinical Journal of Pain
https://www.readbyqxmd.com/read/28428221/circulating-levels-of-interleukin-1-receptor-antagonist-and-risk-of-cardiovascular-disease-meta-analysis-of-six-population-based-cohorts
#6
Christian Herder, Tonia de Las Heras Gala, Maren Carstensen-Kirberg, Cornelia Huth, Astrid Zierer, Simone Wahl, Julie Sudduth-Klinger, Kari Kuulasmaa, David Peretz, Symen Ligthart, Brenda W C Bongaerts, Abbas Dehghan, M Arfan Ikram, Antti Jula, Frank Kee, Arto Pietilä, Olli Saarela, Tanja Zeller, Stefan Blankenberg, Christa Meisinger, Annette Peters, Michael Roden, Veikko Salomaa, Wolfgang Koenig, Barbara Thorand
OBJECTIVE: Interleukin (IL)-1β represents a key cytokine in the development of cardiovascular disease (CVD). IL-1β is counter-regulated by IL-1 receptor antagonist (IL-1RA), an endogenous inhibitor. This study aimed to identify population-based studies on circulating IL-1RA and incident CVD in a systematic review, estimate the association between IL-1RA and incident CVD in a meta-analysis, and to test whether the association between IL-1RA and incident CVD is explained by other inflammation-related biomarkers in the MONICA/KORA Augsburg case-cohort study (Multinational Monitoring of Trends and Determinants in Cardiovascular Disease/Cooperative Health Research in the Region of Augsburg)...
April 20, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28428216/maturation-of-platelet-function-during-murine-fetal-development-in-vivo
#7
Andreas Margraf, Claudia Nussbaum, Ina Rohwedder, Sarah Klapproth, Angela R M Kurz, Annamaria Florian, Volker Wiebking, Joachim Pircher, Monika Pruenster, Roland Immler, Steffen Dietzel, Ludmila Kremer, Friedemann Kiefer, Markus Moser, Andreas W Flemmer, Elizabeth Quackenbush, Ulrich H von Andrian, Markus Sperandio
OBJECTIVE: Platelet function has been intensively studied in the adult organism. However, little is known about the function and hemostatic capacity of platelets in the developing fetus as suitable in vivo models are lacking. APPROACH AND RESULTS: To examine fetal platelet function in vivo, we generated a fetal thrombosis model and investigated light-/dye-induced thrombus formation by intravital microscopy throughout gestation. We observed that significantly less and unstable thrombi were formed at embryonic day (E) 13...
April 20, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28428025/adipokines-as-atherothrombotic-risk-factors-in-obese-subjects-associations-with-haemostatic-markers-and-common-carotid-wall%C3%A2-thickness
#8
É Csongrádi, M Káplár, B Nagy, C A Koch, A Juhász, L Bajnok, Z Varga, I Seres, Z Karányi, M T Magyar, L Oláh, A Facskó, J Kappelmayer, G Paragh
BACKGROUND AND AIMS: Some crucial associations between obesity-related altered adipokine levels and the main factors of atherosclerotic, atherothrombotic processes are not fully known. We analysed the relationships of classic adipokines, namely leptin, resistin, adiponectin, tumour necrosis factor-alpha (TNF-α), interleukin 6 (IL-6) with the markers of platelet activation, including mean platelet volume (MPV), platelet surface/soluble P-selectin, platelet-derived microparticles (PMPs), the parameters of coagulation abnormalities and common carotid intima-media thickness (IMT) in obese patients with or without atherosclerotic comorbidities in comparison to age- and sex-matched controls...
March 8, 2017: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
https://www.readbyqxmd.com/read/28427942/inhibitory-effects-of-ethyl-pyruvate-on-platelet-aggregation-and-phosphatidylserine-exposure
#9
Wenjin Li, Xinyu Yang, Minyuan Peng, Can Li, Guangfu Mu, Fangping Chen
Ethyl pyruvate (EP) is a stable lipophilic pyruvate derivative. Studies demonstrated that EP shows potent anti-oxidation, anti-inflammatory and anti-coagulant effects. Inflammation and coagulation are closely interacted with platelet activation. However, it is unclear whether EP has anti-platelet effects. Therefore, we investigated the anti-platelet effect of EP in this study in vitro. We found that EP inhibited agonists induced platelets aggregation, ATP release and adhesion to collagen. Flow cytometric analysis revealed that EP inhibited agonist induced platelets PAC-1 binding, as well as P-selectin and CD40L expression...
April 18, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28424820/microparticles-during-long-term-follow-up-after-acute-myocardial-infarction-association-to-atherosclerotic-burden-and-risk-of-cardiovascular-events
#10
Christina Christersson, Åsa Thulin, Agneta Siegbahn
Microparticles (MPs) are formed from platelets (PMPs), endothelial cells (EMPs) and monocytes (MMPs), and in acute myocardial infarction (MI), there is an increase of MPs in the culprit artery. In this study MPs were evaluated in whole blood in 105 patients with MI at five time-points during a two-year follow-up (FU). Patients with non-ST-elevated MI had higher concentrations of CD41+MPs compared to ST-elevated MI patients (p=0.024). The concentrations of PMPs in whole blood increased during the time period (p<0...
April 20, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/28421990/elevated-levels-of-soluble-cd40-ligand-are-associated-with-antiphospholipid-antibodies-in-patients-with-systemic-lupus-erythematosus
#11
Ki-Jo Kim, In-Woon Baek, Chong-Hyeon Yoon, Wan-Uk Kim, Chul-Soo Cho
OBJECTIVES: The CD40L/CD40 pathway is involved in the pathophysiology of atherothrombotic disease, and elevated levels of soluble CD40L (sCD40L) were reported in SLE patients. However, the clinical implication of sCD40L in SLE remains elusive. METHODS: We measured levels of plasma sCD40L in 241 SLE patients and 37 healthy controls and investigated its association with clinical manifestation and laboratory parameters. RESULTS: Levels of plasma sCD40L in SLE patients were significantly elevated compared with healthy controls (p=0...
April 18, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28419144/stepwise-inhibition-of-t-cell-recruitment-at-post-capillary-venules-by-orally-active-desulfated-heparins-in-inflammatory-arthritis
#12
Hasan Al Faruque, Jin Hee Kang, Seung Rim Hwang, Shijin Sung, Md Mahmudul Alam, Keum Hee Sa, Eon Jeong Nam, Young Ro Byun, Young Mo Kang
Identification of the structure-function relationship of heparin, particularly between 2-O-, 6-O-, and N-sulfation and its anticoagulant or anti-inflammatory activities, is critical in order to evaluate the biological effects of heparin, especially in conjunction with modifications for oral formulation. In this study, we demonstrated that removal of 2-O, 6-O, or N-desulfation and their hydrophobic modifications have differential effects on the blocking of interactions between sLeX and P-and L-selectins, with highest inhibition by 6-O desulfation, which was consistent with their in vivo therapeutic efficacies on CIA mice...
2017: PloS One
https://www.readbyqxmd.com/read/28415757/an-absence-of-platelet-activation-following-thalidomide-treatment-in-vitro-or-in-vivo
#13
Jianlin Qiao, Yulu Wu, Xiaoqing Wu, Yun Liu, Xiaoqian Li, Wen Ju, Kunming Qi, Depeng Li, Elizabeth E Gardiner, Robert K Andrews, Lingyu Zeng, Kailin Xu
Increased risk of thromboembolism and platelet hyperreactivity has been reported in patients receiving thalidomide therapy. Whether thalidomide induces platelet activation directly or through other factors remains unclear. The aim of this study was to evaluate the effect of thalidomide on platelet activation under resting conditions in vitro and in vivo. Isolated human or mouse platelets were treated with different concentrations of thalidomide (10, 50 and 100 μg/ml) for 60 min at 37°C followed by analysis of platelet surface expression of platelet receptors GPIbα, GPVI, αIIbβ3 and P-selectin, and PAC-1 or fibrinogen binding, by flow cytometry and collagen- or ADP-induced platelet aggregation...
March 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28414123/anti-factor-xa-activities-of-zingerone-with-anti-platelet-aggregation-activity
#14
Wonhwa Lee, Sae-Kwang Ku, Mi-Ae Kim, Jong-Sup Bae
Zingerone (ZGR), a phenolic alkanone found in Zingiber officinale, has been reported to have various pharmacological activities such as anti-inflammatory, anti-apoptotic, and protecting myocardial infarction and irritable bowel disorder. The aim was to identify the unreported bioactive anti-factor Xa (FXa) and anti-platelet activities of ZGR. ZGR was evaluated for their anti-FXa and anti-platelet aggregation properties by monitoring clotting time, platelet aggregation, FXa activity and production, and thrombus formation...
April 13, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28409645/evaluation-of-platelet-function-in-thrombocytopenia
#15
Mette Tiedemann Skipper, Peter Rubak, Jesper Stentoft, Anne-Mette Hvas, Ole Halfdan Larsen
Whole blood aggregometry is a functional assay for determination of platelet function. Until now, whole blood aggregometry has not been considered feasible at low platelet counts. Hence, the objectives of the present study were to explore platelet function in thrombocytopenia using a novel index of impedance aggregometry adjusted for platelet count and evaluate the association to platelet function assessed by flow cytometry. Hirudin anticoagulated blood was collected from 20 healthy volunteers, 20 patients with primary immune thrombocytopenia (ITP), and 17 hematological cancer patients...
April 14, 2017: Platelets
https://www.readbyqxmd.com/read/28406726/role-of-heterotrimeric-g-proteins-in-platelet-activation-and-clot-formation-in-platelets-treated-with-integrin-%C3%AE-iib%C3%AE-3-inhibitor
#16
Ivan Budnik, Boris Shenkman, Hagit Hauschner, Isaac Zilinsky, Naphtali Savion
Mechanisms of platelet activation are triggered by thrombin, adenosine diphosphate (ADP), epinephrine, thromboxane A2, and other soluble agonists which induce signaling via heterotrimeric Gαq, Gαi, and Gα12/13 proteins. We have undertaken a study addressing the contribution of these G proteins to platelet activation and clot formation in the presence of eptifibatide, thus excluding outside-in signaling provided by integrin αIIbβ3-fibrinogen engagement. Selective and combined activation of the G proteins was achieved by using combinations of platelet agonists and inhibitors...
April 13, 2017: Platelets
https://www.readbyqxmd.com/read/28394090/analysis-of-platelet-derived-extracellular-vesicles-in-plateletpheresis-concentrates-a-multicenter-study
#17
Anne Black, Evelyn Orsó, Reinhard Kelsch, Melanie Pereira, Julian Kamhieh-Milz, Abdulgabar Salama, Michael B Fischer, Eduardo Meyer, Beat M Frey, Gerd Schmitz
BACKGROUND: Routine quantification of platelet-derived extracellular vesicles (PL-EVs) may be useful in the quality control (QC) of platelet concentrates (PCs). The aim of this multicenter study was to establish and validate a consensus protocol for the standardized PL-EV quantification using conventional flow cytometers. STUDY DESIGN AMD METHODS: Eighty-six PCs were investigated in five blood transfusion centers (A-E) on Days 0 and 5. The centers used different apheresis instruments: Trima Accel (n = 56) and/or Amicus (n = 30)...
April 10, 2017: Transfusion
https://www.readbyqxmd.com/read/28391912/effects-of-atorvastatin-on-biomarkers-of-immune-activation-inflammation-and-lipids-in-virologically-suppressed-human-immunodeficiency-virus-1-infected-individuals-with-low-density-lipoprotein-cholesterol-130%C3%A2-mg-dl-aids-clinical-trials-group-study-a5275
#18
Daniel E Nixon, Ronald J Bosch, Ellen S Chan, Nicholas T Funderburg, Sally Hodder, Jordan E Lake, Michael M Lederman, Karin L Klingman, Judith A Aberg
BACKGROUND: Persistent immune activation and inflammation in virologically suppressed human immunodeficiency virus (HIV) infection are linked to excess cardiovascular risk. OBJECTIVE: To evaluate atorvastatin as a strategy to reduce cardiovascular risk. METHODS: A5275 was a multicenter, prospective, randomized, double-blind, placebo-controlled, cross-over pilot study of atorvastatin (10 mg/day for 4 weeks then 20 mg/day for 16 weeks) with a planned enrollment of 97 HIV-infected participants ≥18 years old, receiving boosted protease inhibitor-based antiretroviral therapy for ≥6 months, with plasma HIV-1 RNAs below limits of quantification ≥180 days, and fasting low-density lipoprotein (LDL) cholesterol ≥70 and <130 mg/dL...
January 2017: Journal of Clinical Lipidology
https://www.readbyqxmd.com/read/28388872/associations-of-combined-polymorphisms-of-the-platelet-membrane-glycoproteins-ia-and-iiia-and-the-platelet-endothelial-cell-adhesion-molecule-1-and-p-selectin-genes-with-ivf-implantation-failures
#19
Nikolaos Vlachadis, Vasileios Tsamadias, Nikolaos Vrachnis, Georgios Kaparos, Nikolaos Vitoratos, Evaggelia Kouskouni, Emmanuel Economou
The aim of the study was to investigate the combined impact of the genetic heterogeneity of the glycoproteins Ia (GpIa) and IIIa (GpIIIa) and the platelet-endothelial cell adhesion molecule-1 (PECAM-1) and P-Selectin genes on IVF embryo transfer implantation failures (IVF-ET failures). Sixty nulligravida women with previous IVF-ET failures and 60 fertile controls were genotyped for the GpIa-C807T, GpIIIa-PlA1/PA2, PECAM-1-C373G (Leu125Val) and P-Selectin-A37674C (Thr715Pro) polymorphisms by pyrosequencing. Compared with wild-type combined homozygotes, carriers of combinations of risk alleles in two gene loci were at significantly increased risk for IVF-ET failure, whereas carriers of the combination of GpIa-807T, GpIIIa-PlA2 and PECAM-1-373G alleles had OR = 52...
April 2017: Journal of Obstetrics and Gynaecology: the Journal of the Institute of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28385296/17%C3%AE-estradiol-prevents-mesenteric-injury-induced-by-occlusion-of-the-proximal-descending-aorta-in-male-rats
#20
Paulo Thales Rocha de Sousa, Ana Cristina Breithaupt-Faloppa, Cristiano de Jesus Correia, Raif Restivo Simão, Sueli Gomes Ferreira, Alfredo Inácio Fiorelli, Luiz Felipe Pinho Moreira, Paulina Sannomiya
OBJECTIVE: In surgical aortic repair or cardiac surgery with aorta occlusion, the occurrence of mesenteric ischemia and bowel injury has been associated with higher short-term mortality. The vascular protection of estrogens has been investigated and is mainly mediated by increasing the availability of nitric oxide (NO). Therefore, this study investigated the role of 17β-estradiol on visceral ischemia-reperfusion (I/R) injury after descending aorta occlusion in male rats. METHODS: Mesenteric ischemia was induced in male Wistar rats by placing a 2F Fogarty arterial embolectomy catheter (Edwards Lifesciences, Irvine, Calif) in the descending aorta, which remained occluded for 15 minutes, followed by reperfusion for up to 2 hours...
April 3, 2017: Journal of Vascular Surgery
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