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Platelet Volume

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https://www.readbyqxmd.com/read/29150875/treatment-of-acquired-thrombotic-thrombocytopenic-purpura-in-the-u-s-remains-heterogeneous-current-and-future-points-of-clinical-equipoise
#1
Marshall A Mazepa, Jay S Raval, Mark E Brecher, Yara A Park
BACKGROUND: The purpose of this survey was to describe current practices in the U.S. for treatment of acquired Thrombotic Thrombocytopenic Purpura (TTP), compare these with prior U.S. and current Canadian practices, and identify areas of clinical equipoise. STUDY DESIGN AND METHODS: A research team member administered the survey by telephone. Questions included an estimate of the annual patient volume treated, apheresis and medical therapy practices for acquired TTP...
November 18, 2017: Journal of Clinical Apheresis
https://www.readbyqxmd.com/read/29149707/over-expression-of-cyclooxygenase-2-in-increased-reticulated-platelets-leads-to-aspirin-resistance-after-elective-off-pump-coronary-artery-bypass-surgery
#2
Xiaoxuan Gong, Xuezhong Wang, Zhuowen Xu, Tiantian Zhu, Qiu Zhang, Jinying Zhang, Xiaowei Wang, Chunjian Li
INTRODUCTION: Aspirin resistance (AR) has been reported to present after coronary artery bypass graft causing saphenous vein graft failure. We aimed to investigate the factors that affect the anti-platelet effect of aspirin after off-pump coronary artery bypass surgery (OPCAB). MATERIALS AND METHODS: Thirty OPCAB candidates were successively recruited. Platelet count, platelet aggregation, reticulated platelet (RP), platelets' cyclooxygenase (COX)-1 and COX-2 expressions were determined during the peri-operative period...
November 9, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/29145467/adenosine-lidocaine-and-mg2-alm-fluid-therapy-attenuates-systemic-inflammation-platelet-dysfunction-and-coagulopathy-after-non-compressible-truncal-hemorrhage
#3
Hayley Letson, Geoffrey Dobson
BACKGROUND: Systemic inflammation and coagulopathy are major drivers of injury progression following hemorrhagic trauma. Our aim was to examine the effect of small-volume 3% NaCl adenosine, lidocaine and Mg2+ (ALM) bolus and 0.9% NaCl/ALM 'drip' on inflammation and coagulation in a rat model of hemorrhagic shock. METHODS: Sprague-Dawley rats (429±4 g) were randomly assigned to: 1) shams, 2) no-treatment, 3) saline-controls, 4) ALM-therapy, and 5) Hextend®. Hemorrhage was induced in anesthetized-ventilated animals by liver resection (60% left lateral lobe and 50% medial lobe)...
2017: PloS One
https://www.readbyqxmd.com/read/29143464/mean-platelet-diameter-measurements-to-classify-inherited-thrombocytopenias
#4
K Fixter, D J Rabbolini, B Valecha, M-C Morel-Kopp, S Gabrielli, Q Chen, W S Stevenson, C M Ward
INTRODUCTION: Mean platelet volume (MPV) assists the differential diagnosis of inherited thrombocytopenia (IT) but lacks standardisation and varies between automated analysers. Classification of IT based on mean platelet diameter (MPD) has been proposed by an international collaborative study but has not been validated. METHODS: To assess the applicability of MPD to classify forms of IT, digital images of blood films from patients with established genetic causes for IT were generated, and the MPD measured (ZEISS Axio-scanner and Image J software) by a blinded reviewer...
November 16, 2017: International Journal of Laboratory Hematology
https://www.readbyqxmd.com/read/29142864/count-of-platelet-and-mean-platelet-volume-score-serologic-prognostic-factor-in-patients-with-oral-squamous-cell-carcinoma
#5
Jae Woo Park, Chul-Hwan Kim, Yong Chan Ha, Moon Young Kim, Sung Min Park
Objectives: TNM staging, especially for lymph node metastasis, is the scoring system most widely used among prognostic factors for cancer survival. Several biomarkers have been studied as serologic markers, but their specificity is low and clinical applications are difficult. This study aimed to establish a scoring system for patients with oral squamous cell carcinoma (OSCC) using platelet (PLT) and mean platelet volume (MPV) levels measured postoperatively and to evaluate their significance as prognostic factors...
October 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
https://www.readbyqxmd.com/read/29142492/early-changes-in-platelet-size-and-number-in-patients-with-acute-coronary-syndrome
#6
Zora Sušilović Grabovac, Darija Baković, Mislav Lozo, Irena Pintarić, Željko Dujić
A strong relationship exists between acute coronary syndrome (ACS) and platelets (PLTs) volume. Mean platelet volume (MPV) is a parameter of PLT functions and a marker for increased PLT activation. The aim of this study was to determine early changes in number of total PLT and MPV in different manifestation of ACS and to find out predictive value of MPV in the spectrum of ACS. This was a prospective study. One hundred thirty-four ACS patients were enrolled, 76 of them finished the study. PLT and MPV in patients with unstable angina, non-ST elevation, and ST elevation myocardial infarctions were determined on arrival and 1, 3, 72 hours, and 7 days after the admission to hospital...
December 2017: International Journal of Angiology: Official Publication of the International College of Angiology, Inc
https://www.readbyqxmd.com/read/29142420/exploring-the-cytotoxic-potential-of-triterpenoids-enriched-fraction-of-bacopa-monnieri-by-implementing-in-vitro-in-vivo-and-in-silico-approaches
#7
Md Nasar Mallick, Washim Khan, Rabea Parveen, Sayeed Ahmad, Sadaf, Mohammad Zeeshan Najm, Istaq Ahmad, Syed Akhtar Husain
Background: Bacopa monnieri (BM) is a herbaceous plant traditionally used from time immemorial in Ayurvedic and folklore medicines. We hypothesized that the extract of the whole plant might contain numerous molecules with having antitumor activities that could be very effective in killing of human cancer cells. Objectives: This work investigated anticancer activity of bioactive fraction of BM. Materials and Methods: The hydroalcoholic extract of BM was fractionated with different solvent, namely, hexane, dichloromethane (DCM), acetone, methanol, and water...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29140587/comparison-of-haematology-and-biochemistry-parameters-in-healthy-south-african-infants-with-laboratory-reference-intervals
#8
B Schmidt, M Tameris, H Geldenhuys, A Luabeya, E Bunyasi, T Hawkridge, J B McClain, H Mahomed, T J Scriba, H McShane, M Hatherill
OBJECTIVE: Paediatric laboratory reference intervals used in Africa and Asia may be derived from historical intervals of predominantly Caucasian infants in Europe or North America. These intervals may therefore not be compatible with the range of normality for developing country populations. We aimed to compare haematology and biochemistry parameters in healthy South African infants with local laboratory reference intervals. METHODS: We compared the baseline haematology and biochemistry results of 634 (316 male and 318 female) HIV-unexposed infants, aged 3-6 months, living in a rural area of the Western Cape Province, South Africa, against laboratory reference intervals supplied by the South African National Health Laboratory Services (NHLS)...
November 15, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/29138790/high-efficiency-single-cell-encapsulation-and-size-selective-capture-of-cells-in-picoliter-droplets-based-on-hydrodynamic-micro-vortices
#9
Gopakumar Kamalakshakurup, Abraham P Lee
Single cell analysis has emerged as a paradigm shift in cell biology to understand the heterogeneity of individual cells in a clone for pathological interrogation. Microfluidic droplet technology is a compelling platform to perform single cell analysis by encapsulating single cells inside picoliter-nanoliter (pL-nL) volume droplets. However, one of the primary challenges for droplet based single cell assays is single cell encapsulation in droplets, currently achieved either randomly, dictated by Poisson statistics, or by hydrodynamic techniques...
November 15, 2017: Lab on a Chip
https://www.readbyqxmd.com/read/29137040/a-multicenter-open-label-phase-iii-study-of-abcertin-in-gaucher-disease
#10
Beom Hee Lee, Ahmed Fathy Abdalla, Jin-Ho Choi, Amal El Beshlawy, Gu-Hwan Kim, Sun Hee Heo, Ahmed Megahed Hassan Megahed, Mona Abdel Latif Elsayed, Tarik El-Sayed Mohammad Barakat, Khaled Mohamed Abd El-Azim Eid, Mona Hassan El-Tagui, Mona Mohamed Hamdy Mahmoud, Ekram Fateen, June-Young Park, Han-Wook Yoo
BACKGROUND: Gaucher disease (GD) is caused by a deficiency in the lysosomal enzyme glucocerebrosidase. Enzyme replacement therapy (ERT) is recommended for clinical improvement. METHODS: The efficacy and safety of a new imiglucerase, Abcertin, were assessed in 7 Egyptian patients with treatment-naïve type 1 GD. Each patient was administered a biweekly 60 U/kg dose of Abcertin for 6 months. The primary endpoint was the change in hemoglobin concentration. The secondary endpoints were changes from baseline in platelet counts, spleen and liver volumes, biomarker levels, skeletal parameters, and bone mineral density...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29134925/effects-of-ssri-exposure-on-hemorrhagic-complications-and-outcome-following-thrombolysis-in-ischemic-stroke
#11
Schellen Christoph, Ferrari Julia, Lang Wilfried, Sykora Marek
Background Selective serotonin reuptake inhibitors (SSRI) may interfere with platelet function, and pre-stroke SSRI treatment has been associated with increased hematoma volumes and mortality in hemorrhagic stroke patients. The effects of SSRI on the risk of hemorrhagic complications after thrombolysis in ischemic stroke patients are unclear. Aims To examine the effects of pre-stroke SSRI exposure on bleeding complications, functional outcome, and mortality following thrombolysis in ischemic stroke. Methods Data including standard demographic and clinical variables as well as baseline and follow-up stroke severity (measured by National Institutes of Health Stroke Score), functional outcome (measured by modified Rankin Scale) at 3 months, and mortality at 7 and 90 days were extracted from the Virtual International Stroke Trials Archive...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/29134377/markers-of-systemic-inflammatory-response-are-prognostic-factors-in-patients-with-pancreatic-neuroendocrine-tumors-pnets-a-prospective-analysis
#12
Apostolos Gaitanidis, Dhaval Patel, Naris Nilubol, Amit Tirosh, Samira Sadowski, Electron Kebebew
BACKGROUND: The prognosis and behavior of pancreatic neuroendocrine tumors (PNETs) vary and may be divergent even at the same stage or tumor grade. Markers of systemic inflammatory response are readily available and are inexpensive, and have been shown to be prognostic factors in several cancers. OBJECTIVE: The aim of this study was to evaluate the prognostic utility of markers of systemic inflammatory response in patients with PNETs. METHODS: A prospective study of 97 patients with PNETs was performed (median follow-up of 15 months, range 12-73 months)...
November 13, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/29133080/population-pharmacokinetics-of-nintedanib-in-patients-with-idiopathic-pulmonary-fibrosis
#13
Ulrike Schmid, Christiane Doege, Claudia Dallinger, Matthias Freiwald
BACKGROUND: Nintedanib is a potent intracellular inhibitor of tyrosine kinases, including the receptor kinases vascular endothelial growth factor, platelet-derived growth factor and fibroblast growth factor. A previous model assessed the population pharmacokinetics of nintedanib and its main metabolite BIBF 1202 in patients with non-small cell lung cancer and idiopathic pulmonary fibrosis (IPF). The objective of this analysis was to further characterise the population pharmacokinetics of nintedanib in patients with IPF by including data from the Phase III trials...
November 10, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29126301/coagulation-testing-in-the-core-laboratory
#14
William E Winter, Sherri D Flax, Neil S Harris
Primary hemostasis begins with endothelial injury. VWF, produced by endothelial cells, binds to platelets and links them to subendothelial collagen. Platelet-derived ADP and thromboxane activate non-adhered platelets via their GPIIb/IIIa receptors, allowing these platelets to participate in platelet aggregation. Secondary hemostasis is initiated with the binding of factor VII to extravascular tissue factor (TF). Factors II, VII, IX and X are vitamin K-dependent factors. The role of vitamin K is to assist in the addition of gamma carboxylate groups to glutamic acids in the "GLA" domains of these factors...
November 8, 2017: Laboratory Medicine
https://www.readbyqxmd.com/read/29125794/sr-b1-a-unique-multifunctional-receptor-for-cholesterol-influx-and-efflux
#15
Wen-Jun Shen, Salman Azhar, Fredric B Kraemer
The scavenger receptor, class B type 1 (SR-B1), is a multiligand membrane receptor protein that functions as a physiologically relevant high-density lipoprotein (HDL) receptor whose primary role is to mediate selective uptake or influx of HDL-derived cholesteryl esters into cells and tissues. SR-B1 also facilitates the efflux of cholesterol from peripheral tissues, including macrophages, back to liver. As a regulator of plasma membrane cholesterol content, SR-B1 promotes the uptake of lipid soluble vitamins as well as viral entry into host cells...
November 9, 2017: Annual Review of Physiology
https://www.readbyqxmd.com/read/29122407/three-dimensional-poly-lactic-co-glycolic-acid-scaffold-containing-autologous-platelet-rich-plasma-supports-keloid-fibroblast-growth-and-contributes-to-keloid-formation-in-a-nude-mouse-model
#16
Chunlin Chen, Haibin Wang, Guozhang Zhu, Zhongsheng Sun, Xiang Xu, Fangwei Li, Shengkang Luo
BACKGROUND: There is a lack of proper animal models to study keloid formation. AIM: To create three-dimensional poly lactic-co-glycolic acid (PLGA) scaffolds containing autologous platelet-rich plasma (PRP) as an in vitro culture environment for keloid fibroblasts (KL), and to study their implantation into nude mice to mimic the process of keloid formation. METHODS: Normal fibroblasts (FB) and KL cells were isolated from surgical specimens and transduced with lentivirus loaded with green fluorescent protein (GFP) and luciferase genes...
October 26, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/29121038/is-mean-platelet-volume-a-good-predictor-of-sustained-response-to-one-year-infliximab-therapy-in-pediatric-patients-with-crohn-s-disease
#17
Roma Herman, Małgorzata Sładek, Stanisław Pieczarkowski, Paulina Dumnicka, Krzysztof Fyderek
Over the past years, there is a growing number of newly diagnosed pediatric patients with Crohn's disease (CD). Severe course of CD often requires biological treatment with Infliximab (IFX). Loss of response to biological treatment is a major problem. Mean platelet volume (MPV) was reported as a good marker of sustained response to IFX therapy in adults. This study is to determine whether MPV measured prior to IFX therapy and a er its third dose can be used as a predictive marker of sustained response to biological therapy in children with severe course of CD...
2017: Folia Medica Cracoviensia
https://www.readbyqxmd.com/read/29114667/massive-hydration-driven-swelling-of-layered-perovskite-niobate-crystals-in-aqueous-solutions-of-organo-ammonium-bases
#18
Yeji Song, Nobuo Iyi, Tatsumasa Hoshide, Tadashi C Ozawa, Yasuo Ebina, Renzhi Ma, Shinya Yamamoto, Nobuyoshi Miyamoto, Takayoshi Sasaki
Osmotic swelling behaviors in layered perovskite niobate were examined in aqueous solutions containing three types of amine-related agents including quaternary ammonium hydroxides and tertiary aminoethanol. Platelet microcrystals of a protonated layered perovskite niobate, HCa2Nb3O10·1.5H2O, were found to show enormous swelling in the aqueous solutions, which was clearly recognized by the noticeable expansion of the sample volume over 100-fold. Optical microscopy observations revealed that the crystals underwent accordion-like elongation in the layer-stacking direction up to several ten-fold the initial thickness...
November 8, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29109940/erratum-relationship-of-admission-mean-platelet-volume-platelet-distribution-width-and-white-blood-cells-with-st-resolution-in-patients-with-acute-st-segment-elevation-myocardial-infarction-treated-with-streptokinase-without-history-of-previous-cardiovascular
#19
https://www.readbyqxmd.com/read/29109595/the-role-of-hematological-indices-in-patients-with-acute-coronary-syndrome
#20
REVIEW
Jan Budzianowski, Konrad Pieszko, Paweł Burchardt, Janusz Rzeźniczak, Jarosław Hiczkiewicz
An increased systemic and local inflammation plays a key role in the pathophysiology of acute coronary syndrome (ACS). This review will discuss the role of hematological indices: white blood cells (WBC), neutrophil to lymphocyte ratio (NLR), red cell distribution width (RDW), and platelet indices, that is, platelet to lymphocyte ratio (PLR), mean platelet volume (MPV), and platelet distribution width (PDW) in the case of ACS. In recent years, a strong interest has been drawn to these indices, given that they may provide independent information on pathophysiology, risk stratification, and optimal management...
2017: Disease Markers
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