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https://www.readbyqxmd.com/read/27913583/epigenetic-control-of-microsomal-prostaglandin-e-synthase-1-by-hdac-mediated-recruitment-of-p300
#1
Christian Fork, Andrea E Vasconez, Patrick Janetzko, Carlo Angioni, Yannick Schreiber, Nerea Ferreiros, Gerd Geisslinger, Matthias S Leisegang, Dieter Steinhilber, Ralf P Brandes
: Nonsteroidal anti-inflammatory drugs (NSAIDs) are the most widely used medicine to treat pain, fever, inflammation and to inhibit platelet function. Understanding the expression regulation of enzymes of the prostanoid pathway is of great medical relevance. Histone acetylation crucially controls gene expression. We set out to identify the impact of histone deacetylases (HDACs) on the generation of prostanoids and examine the consequences on vascular function. Inhibition of HDACs (HDACi) with the pan HDAC inhibitor SAHA attenuated prostaglandin E2 (PGE2) generation in the murine vasculature and in human vascular smooth muscle cells...
December 2, 2016: Journal of Lipid Research
https://www.readbyqxmd.com/read/27913549/second-line-therapies-in-immune-thrombocytopenia
#2
Rachael F Grace, Cindy Neunert
Immune thrombocytopenia (ITP) is a rare, acquired autoimmune condition characterized by a low platelet count and an increased risk of bleeding. Although many children and adults with ITP will not need therapy beyond historic first-line treatments of observation, steroids, intravenous immunoglobulin (IVIG), and anti-D globulin, others will have an indication for second-line treatment. Selecting a second-line therapy depends on the reason for treatment, which can vary from bleeding to implications for health-related quality of life (HRQoL) to likelihood of remission and patient preference with regard to adverse effects, route of administration, and cost...
December 2, 2016: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/27911420/-role-of-immunological-factors-in-the-development-of-myopic-choroidal-neovascularization
#3
A G Shchuko, N V Zaitseva, T N Yur'eva, E R Chernykh, I M Mikhalevich, A V Grigor'eva
AIM: To study the concentration of cytokines in the aqueous humor of the anterior chamber in patients with myopic choroidal neovascularization (mCNV) and to compare the results to their ophthalmic status. MATERIAL AND METHODS: A total of 19 patients (19 eyes) with mCNV treated with intravitreal ranibizumab were included in the study. The control group consisted of 15 patients (15 eyes) with myopia who had cataract surgery. Age, sex, and refractive error distribution were similar to that in the study group...
2016: Vestnik Oftalmologii
https://www.readbyqxmd.com/read/27909693/unfractionated-and-low-molecular-weight-heparin-and-the-phosphodiesterase-inhibitors-ibmx-and-cilostazol-block-ex-vivo-equid-herpesvirus-type-1-induced-platelet-activation
#4
Tracy Stokol, Priscila B D Serpa, Muhammad N Zahid, Marjory B Brooks
Equid herpes virus type-1 (EHV-1) is a major pathogen of horses, causing abortion storms and outbreaks of herpes virus myeloencephalopathy. These clinical syndromes are partly attributed to ischemic injury from thrombosis in placental and spinal vessels. The mechanism of thrombosis in affected horses is unknown. We have previously shown that EHV-1 activates platelets through virus-associated tissue factor-initiated thrombin generation. Activated platelets participate in thrombus formation by providing a surface to localize coagulation factor complexes that amplify and propagate thrombin generation...
2016: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/27908221/dasatinib-prevent-hepatic-fibrosis-induced-by-carbon-tetrachloride-ccl4-via-anti-inflammatory-and-antioxidant-mechanism
#5
Adel Mohammadalipour, Jamshid Karimi, Iraj Khodadadi, Ghasem Solgi, Mohammad Hashemnia, Nasrin Sheikh, Majid Bahabadi
OBJECTIVES: Dasatinib, a potent and broad-spectrum tyrosine kinase inhibitor, is approved for the treatment of imatinib-resistant chronic myelogenous leukemia. The aim of this study was to evaluate the anti-fibrotic, anti-inflammatory and antioxidant effects of this agent against CCl4-induced hepatic fibrosis and oxidative status. MATERIALS AND METHODS: Experimental fibrosis was induced in Wistar male rats by 12 weeks of CCl4 administration (i.p.). During the last 8 weeks of injection, rats were gavaged daily with Dasatinib (10 mg/kg)...
December 1, 2016: Immunopharmacology and Immunotoxicology
https://www.readbyqxmd.com/read/27904973/platelet-reactivity-and-clinical-outcomes-in-patients-using-cyp3a4-metabolized-statins-with-clopidogrel-in-percutaneous-coronary-intervention
#6
Jin Sup Park, Kwang Soo Cha, Hye Won Lee, Jun-Hyok Oh, Jung Hyun Choi, Han Cheol Lee, Taek Jong Hong, Hyo Soo Kim
Statins are primarily metabolized by cytochrome P450 3A4 (CYP3A4), which reduces clopidogrel to its active metabolite. Recent studies suggest that CYP3A4-metabolized statins attenuate clopidogrel's anti-aggregatory effect on platelets. We aimed to assess the impact of concomitant CYP3A4-metabolized statin and clopidogrel use on antiplatelet activity and clinical outcomes in patients undergoing percutaneous coronary intervention (PCI). We enrolled 1187 patients from the HOST-ASSURE trial with platelet reactivity unit (PRU) values at both baseline and 1 month...
November 30, 2016: Heart and Vessels
https://www.readbyqxmd.com/read/27904584/effectiveness-and-relevant-factors-of-platelet-rich-plasma-treatment-in-managing-plantar-fasciitis-a-systematic-review
#7
REVIEW
Seet Khing Chiew, Thamil Selvee Ramasamy, Farahnaz Amini
BACKGROUND: Plantar fasciitis (PF) is a common foot complaint, affects both active sportsmen and physically inactive middle age group. It is believed that PF results from degenerative changes rather than inflammation. Platelet-rich plasma (PRP) therapy has been introduced as an alternative therapy for PF. This study is aimed to systematically review to the effectiveness and relevant factors of PRP treatment in managing PF. MATERIALS AND METHODS: A search was conducted in electronic databases, including PubMed, Scopus, and Google Scholar using different keywords...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27904529/anti-aggregatory-effect-of-boswellic-acid-in-high-fat-fed-rats-involvement-of-redox-and-inflammatory-cascades
#8
Mona Kamal Tawfik
INTRODUCTION: A high-fat diet is one of the main dietary factors promoting platelet aggregation. The present study was conducted to elucidate the involvement of boswellic acid (BA) on the platelet hyperaggregability in HFD-fed rats. As platelet hyperaggregability in HFD rats is closely linked to inflammation and enhanced free radical production, the present study was extended to evaluate the anti-inflammatory and anti-oxidative effect of BA on HFD-promoted platelet aggregation. MATERIAL AND METHODS: Rats were assigned to normal, HFD-fed, aspirin-treated (30 mg/kg), and BA-treated (250 and 500 mg/kg) groups...
December 1, 2016: Archives of Medical Science: AMS
https://www.readbyqxmd.com/read/27904082/design-and-synthesis-of-non-peptide-rgd-mimics-for-evaluation-of-their-utility-as-anti-platelet-agents
#9
Kazuhiro Higuchi, Hideki Hikita, Asumi Murayama, Daichi Yuri, Natsu Kobayakawa, Takashi Takahashi, Shigeru Kojima, Hiroko Ueno, Tomomi Hatakeyama, Airi Kato, Masanori Tayu, Etsuko Oyama, Shigeo Sugiyama, Kazuyuki Ishii, Hidenobu Takahashi, Tomomi Kawasaki
Arg-Gly-Asp (RGD) mimics were synthesized and their anti-platelet activity was evaluated. A concise method was developed for the synthesis of the target compounds from dehydroepiandrosterone and Wieland-Miescher and Hajos-Parrish ketones, which are suitable for readily available platform. Among the synthesized compounds, the perhydronaphthalene framework with a 3-(4-piperidinyl)propoxyl structure 3e possessed the highest anti-aggregative activity. The IC50 values of 3e were 0.91 mM (ADP initiation) and 0...
2016: Chemical & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/27903583/aspirin-therapy-reduces-the-ability-of-platelets-to-promote-colon-and-pancreatic-cancer-cell-proliferation-implications-for-the-oncoprotein-c-myc
#10
Annachiara Mitrugno, Joanna L Sylman, Anh T P Ngo, Jiaqing Pang, Rosalie C Sears, Craig Williams, Owen J T McCarty
Aspirin, an anti-inflammatory and anti-thrombotic drug, has become the focus of intense research as a potential anti-cancer agent owing to its ability to reduce tumor proliferation in vitro and to prevent tumorigenesis in patients. Studies have found an anti-cancer effect of aspirin when used in low, anti-platelet doses. However, the mechanism(s) through which low dose aspirin works is poorly understood. In this study we aimed to determine the effect of aspirin on the crosstalk between platelets and cancer cells...
November 30, 2016: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/27903229/an-overview-of-neolignans-of-the-genus-piper-l-isolation-methods-and-biological-activities
#11
Arthur Ladeira Macedo, Thais Carvalho Costa Dos Santos, Alessandra Leda Valverde, Davyson de Lima Moreira, Thatyana Rocha Alves Vasconcelos
The genus Piper L. has the shikimic acid pathway predominantly expressed, biosynthesizing many cinnamic acid derivatives (CAD). Neolignans comprise an important class of CAD that exhibit a wide range of pharmacological properties such as antibacterial, antitumor, insecticidal, anti-inflammatory, antioxidant, smooth muscle relaxant, neuroprotective, antiprotozoal and against platelet aggregation factor. These substances have been extracted and isolated from Piper species using different technics. The present review aims to summarize extraction and isolation methods and biological activities of the different types of neolignans covering the period from 1968 to January 2016...
November 29, 2016: Mini Reviews in Medicinal Chemistry
https://www.readbyqxmd.com/read/27901126/low-level-light-treatment-ameliorates-immune-thrombocytopenia
#12
Jingke Yang, Qi Zhang, Peiyu Li, Tingting Dong, Mei X Wu
Immune thrombocytopenia (ITP) is an immune-mediated acquired bleeding disorder characterized by abnormally low platelet counts. We reported here the ability of low-level light treatment (LLLT) to alleviate ITP in mice. The treatment is based on noninvasive whole body illumination 30 min a day for a few consecutive days by near infrared light (830 nm) transmitted by an array of light-emitting diodes (LEDs). LLLT significantly lifted the nadir of platelet counts and restored tail bleeding time when applied to two passive ITP models induced by anti-CD41 antibody...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27897101/platelets-from-glioblastoma-patients-promote-angiogenesis-of-tumor-endothelial-cells-and-exhibit-increased-vegf-content-and-release
#13
Clara Di Vito, Stefania Elena Navone, Giovanni Marfia, Loubna Abdel Hadi, Maria Elisa Mancuso, Alessandro Pecci, Francesco Maria Crisà, Valeria Berno, Paolo Rampini, Rolando Campanella, Laura Riboni
Glioblastoma multiforme (GBM) is the most common and fatal intracranial cancer in humans and exhibits intense and aberrant angiogenesis that sustains its malignancy and involves several angiogenic signals. Among them, vascular endothelial growth factor (VEGF) plays a key role and is overexpressed in GBM. Different cells appear to act as triggers of the aberrant angiogenesis, and, among them, platelets act as key participants. In order to provide further insights into the platelet features and angiogenic role in GBM, this study investigated the effects of platelet releasate on GBM-derived endothelial cells (GECs) and the levels of VEGF and endostatin, as pro- and anti-angiogenic components of platelet releasate from GBM patients...
November 29, 2016: Platelets
https://www.readbyqxmd.com/read/27896950/ppar%C3%AE-agonists-negatively-regulate-%C3%AE-iib%C3%AE-3-integrin-outside-in-signalling-and-platelet-function-through-upregulation-of-protein-kinase-a-activity
#14
A J Unsworth, N Kriek, A P Bye, K Naran, T Sage, G D Flora, J M Gibbins
BACKGROUND: Agonists for the peroxisome proliferator activated receptor PPARγ, have been shown to have inhibitory effects on platelet activity following stimulation by GPVI and GPCR agonists. OBJECTIVES: Profound effects on thrombus formation led us to suspect a role for PPARγ agonists in the regulation of integrin αIIbβ3 mediated signalling. Both GPVI and GPCR signalling pathways lead to αIIbβ3 activation, and signalling through αIIbβ3 plays a critical role in platelet function and normal haemostasis...
November 29, 2016: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/27895175/platelets-mediate-host-defense-against-staphylococcus-aureus-through-direct-bactericidal-activity-and-by-enhancing-macrophage-activities
#15
Ramadan A Ali, Leah M Wuescher, Keith R Dona, Randall G Worth
Platelets are the chief effector cells in hemostasis. However, recent evidence suggests they have multiple roles in host defense against infection. Reports by us and others showed that platelets functionally contribute to protection against Staphylococcus aureus infection. In the current study, the capacity of mouse platelets to participate in host defense against S. aureus infection was determined by assessing two possibilities. First, we determined the ability of platelets to kill S. aureus directly; and, second, we tested the possibility that platelets enhance macrophage phagocytosis and intracellular killing of S...
November 28, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27893176/desmopressin-for-treatment-of-platelet-dysfunction-and-reversal-of-antiplatelet-agents-a-systematic-review-and-meta-analysis-of-randomised-controlled-trials
#16
M J R Desborough, K A Oakland, G Landoni, M Crivellari, C Doree, L J Estcourt, S J Stanworth
BACKGROUND: Platelet dysfunction, including that caused by antiplatelet agents, increases the risk of perioperative bleeding. The optimal management of patients with platelet dysfunction undergoing surgery is unclear. OBJECTIVES: To assess whether desmopressin reduces perioperative allogeneic red cell transfusion and bleeding for patients with platelet dysfunction. PATIENTS/METHODS: We searched for randomised controlled trials in The Cochrane Central Register of Controlled Trials, MEDLINE, PubMed, Embase, the Transfusion Evidence Library and ISI Web of Science to 7(th) July 2016...
November 28, 2016: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/27891377/immune-thrombocytopenia-as-a-presenting-manifestation-of-tuberculosis-challenge-in-resource-constraint-settings
#17
Deba Prasad Dhibar, Kamal Kant Sahu, Varun Dhir, Surjit Singh
Tuberculosis can infect almost any organ of our body leading to various presentations and its complication. Various haematological manifestations of tuberculosis are well known. But isolated thrombocytopenia and Immune Thrombocytopenia (ITP) in patients with tuberculosis is very rare. Here we report a case of young man who presented with acute onset of bleeding manifestations in the form of epistaxis and macroscopic haematuria with platelets count of 5×10(9)/L. The patient was diagnosed to have ITP along with clinical and radiological evidence of active tuberculosis...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27889559/plasma-endothelial-microparticles-reflect-the-extent-of-capillaroscopic-alterations-and-correlate-with-the-severity-of-skin-involvement-in-systemic-sclerosis
#18
Małgorzata Michalska-Jakubus, Otylia Kowal-Bielecka, Vanessa Smith, Maurizio Cutolo, Dorota Krasowska
INTRODUCTION AND AIM: Endothelial microparticles (EMPs) are membrane-coated vesicles shed from endothelial cells and are considered markers of the endothelial state. It has been shown that total numbers of circulating EMPs are increased in patients with systemic sclerosis (SSc), but their clinical correlations have not yet been investigated in detail. We aimed to assess possible relationships between circulating EMPs and clinical as well as laboratory features among SSc patients with special attention to possible association with alteration in microvascular morphology objectified on nailfold videocapillaroscopy and clinical signs of microvascular complications...
November 23, 2016: Microvascular Research
https://www.readbyqxmd.com/read/27887648/the-potential-hazard-of-drug-eluting-stent-induced-coronary-vasospasm-causing-subacute-stent-thrombosis-a-case-report
#19
Hiroki Shibutani, Yuzo Akita, Yumie Matsui, Masahiro Yoshinaga, Masahiro Karakawa
BACKGROUND: Drug-eluting stent (DES) -induced coronary vasospasm is a well known phenomenon after stent implantation; however, the extent of this risk is still unknown. We report a case in which DES-induced severe coronary vasospasm was clinically suspected as a cause of subacute stent thrombosis (ST). CASE PRESENTATION: A 67-year-old man came to our hospital due to chest pain with mild exercise. He was diagnosed with effort angina by coronary angiography and underwent DES implantation in the mid-left ascending artery (LAD) after the administration of dual anti-platelet therapy...
November 25, 2016: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/27885699/strains-of-group-b-streptococci-from-septic-patients-induce-platelet-activation-via-toll-like-receptor-2
#20
Xiaoyan Liu, Hongyun Liu, Xianming Luo, Ping Zhang, Yanmin Gao, Shuangfeng Xie, Kang Xu, Jianxing Chang, Liping Ma
Group B Streptococcus (GBS) causes life-threatening bacterial sepsis, especially in newborns and pregnant women. Patients suffering from sepsis often display low platelet counts, characterized by thrombocytopenia, because of platelet activation. In the present study, the roles of six GBS strains from septic patients in platelet aggregation, as well as the underlying mechanisms, were investigated. Incubation of platelets with three of the strains induced platelet aggregation, increased the secretion of cellular adhesin molecule CD62P and activation of GPIIb/IIIa...
November 25, 2016: Clinical and Experimental Pharmacology & Physiology
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