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Platelet Volume

A L Litvinenko, A E Moskalensky, N A Karmadonova, V M Nekrasov, D I Strokotov, A I Konokhova, M A Yurkin, E A Pokushalov, A V Chernyshev, V P Maltsev
Whereas commercially available hematological analyzers measure volume of individual platelets, angle-resolved light-scattering provides unique ability to additionally measure their shape index. We utilized the scanning flow cytometer to measure light-scattering profiles (LSPs) of individual platelets taken from 16 healthy donors and the solution of the inverse light-scattering problem to retrieve the volume and shape index of each platelet. In normal conditions, the platelet shape index distribution (PSID) demonstrates three peaks, which relate to resting, partially activated, and fully activated platelets...
October 21, 2016: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
Ayse Carlioglu, Ozge Timur, Senay Durmaz, Mehmet E Ayhan
No abstract text is available yet for this article.
October 13, 2016: Blood Coagulation & Fibrinolysis: An International Journal in Haemostasis and Thrombosis
Li-Li Wang, Ting-Ting Wei, Jian-Rong Yin, Bao-Dong Qin, Ning Ma, Qing-Qin Tang, Lin Zhou, Ren-Qian Zhong
No abstract text is available yet for this article.
October 18, 2016: Clinical Chemistry and Laboratory Medicine: CCLM
Shilpi Yadav, Jonathan K Williamson, Maria A Aronova, Andrew A Prince, Irina D Pokrovskaya, Richard D Leapman, Brian Storrie
Platelets are small, anucleate cell fragments that are central to hemostasis, thrombosis, and inflammation. They are derived from megakaryocytes from which they inherit their organelles. As platelets can synthesize proteins and contain many of the enzymes of the secretory pathway, one might expect all mature human platelets to contain a stacked Golgi apparatus, the central organelle of the secretory pathway. By thin section electron microscopy, stacked membranes resembling the stacked Golgi compartment in megakaryocytes and other nucleated cells can be detected in both proplatelets and platelets...
October 18, 2016: Platelets
Jasjeet Bhullar, Veena M Bhopale, Ming Yang, Kinjal Sethuraman, Stephen R Thom
This investigation explored the mechanism for microparticles (MPs) production by human and murine platelets exposed to high pressures of inert gases. Results demonstrate that MPs production occurs via an oxidative stress response in a dose-dependent manner and follows the potency series N2 > Ar > He. Gases with higher van der Waals volumes or polarizability such as SF6 and N2O, or hydrostatic pressure, do not cause MPs production. Singlet O2 is generated by N2, Ar and He, which is linked to NADPH oxidase (NOX) activity...
October 14, 2016: Free Radical Biology & Medicine
Xiaojun Ren, Zhaowei Meng, Ming Liu, Mei Zhu, Qing He, Qing Zhang, Li Liu, Kun Song, Qiyu Jia, Qiang Jia, Xue Li, Jian Tan, Wei Zheng, Renfei Wang, Na Liu, Tianpeng Hu
Mean platelet volume (MPV) and platelet distribution width (PDW) are morphometric indices of size distribution and variability of platelet. We aimed to explore the associations between MPV or PDW and thyroid function in a large Chinese cohort.This was a cross-sectional study with a recruitment of 13,622 self-reported healthy Chinese (8424 males, 5198 females). Clinical data of the participants comprised of anthropometric measurements, hepatic function, renal function, serum levels of lipid, glucose, C-reactive protein, erythrocyte sedimentation rate, platelet, MPV, PDW, and thyroid hormones...
October 2016: Medicine (Baltimore)
Mito Kobayashi, Tomoyuki Kawase, Kazuhiro Okuda, Larry F Wolff, Hiromasa Yoshie
BACKGROUND: Platelet-rich fibrin (PRF), a platelet-rich plasma (PRP) derivative mainly composed of fibrin networks, has been increasingly demonstrated to be effective in wound healing in clinical and pre-clinical animal studies. However, there has still been a concern that major growth factors may significantly be loss from PRF during its preparation through the slow clotting process. To address this concern, we compared the angiogenic potential of PRF and PRP by standardization of procedures based on volume ratios...
December 2015: Int J Implant Dent
Hamoud Al-Mousa, Abbas Hawwari, Abdulaziz Al-Ghonaium, Bandar Al-Saud, Hasan Al-Dhekri, Saleh Al-Muhsen, Sahar Elshorbagi, Majed Dasouki, Lina El-Baik, Amal Alseraihy, Mouhab Ayas, Rand Arnaout
WIP deficiency causes autosomal recessive Wiskott - Aldrich syndromewith normal platelet mean volume and can be cured with hematopoietic stem cell transplantation from genoidentical related or unrelated umbilical cord.
October 11, 2016: Journal of Allergy and Clinical Immunology
Seher Erdoğan, Arzu Oto, Mehmet Boşnak
Mean platelet volume (MPV) is a simple and economical test that is easy to interpret and is routinely measured with automatic cell counters. It indicates platelet volume and platelet function and activation. Variations in platelet volume may occur more as a result of varying differentiation of megakaryocytes in association with production agents in bone marrow rather than of ageing of platelets in circulation. The purpose of this study was to evaluate the relation between mortality and changes in MPV values in patients hospitalized in the pediatric intensive care unit...
November 2015: Turkish Journal of Pediatrics
Cigdem Abide Yayla, Enis Ozkaya, Ahter Tayyar, Taylan Senol, M Baki Senturk, Ates Karateke
BACKGROUND: The aim of this study was to assess the relationship between some complete blood count parameters and placental invasion anomalies. METHODS: Totally 146 pregnants who were suspected for placental invasion anomalies underwent complete blood count screening before cesarean section. In all subjects white blood cell, lymphocyte, neutrophil and platelet counts with red cell distribution width, mean platelet volume, hemoglobin and hematocrit levels were analysed...
October 13, 2016: Journal of Maternal-fetal & Neonatal Medicine
Roby Sebastian, Todd Ratliff, Peter D Winch, Dmitry Tumin, Daniel Gomez, Joseph Tobias, Mark Galantowicz, Aymen N Naguib
BACKGROUND: The majority of allogeneic transfusions occur in the perioperative setting, especially during cardiac surgery. In addition to the economic implications, there is emerging evidence that blood transfusion may increase both morbidity and mortality. Acute normovolemic hemodilution (ANH) may limit the need for blood products. OBJECTIVES: The primary objective of this study was to determine if the method of blood collection (syringe or bag) during the ANH process impacted the platelet count and function...
October 13, 2016: Paediatric Anaesthesia
Maya Koren-Michowitz, Noa Lavi, Martin H Ellis, Alessandro M Vannucchi, Ruben Mesa, Claire N Harrison
Extreme thrombocytosis (ExT) has been associated with an increased bleeding risk in myeloproliferative neoplasm (MPN) patients and is included in the high risk category in treatment guidelines. Treatment of patients with ExT has not been studied in prospective trials. To study physicians' approaches to ExT, we distributed a web based questionnaire with clinical case scenarios to 202 members of MPN working groups. Cases included low thrombotic risk essential thrombocythemia (ET) with either JAK2V617F or CALR mutation, polycythemia vera with ExT either with or without leukocytosis, an ET patient needing urgent orthopedic surgery, and a poorly controlled ET patient with acute cerebral venous sinus thrombosis...
October 13, 2016: Annals of Hematology
Bartosz Hudzik, Janusz Szkodziński, Jarosław Wasilewski, Marek Gierlotka, Andrzej Lekston, Lech Poloński, Mariusz Gąsior
AIM: We investigated prognostic value of novel simplified thrombo-inflammatory score (sTIPS) in patients with ST-elevation myocardial infarction (STEMI) and diabetes mellitus. METHODS: A total of 465 patients with diabetes mellitus and STEMI were included in the study. Based on admission cut-off values for predicting in-hospital mortality of white blood cell count (>13.4 × 10(3)/mm(3)) and mean platelet volume-to-platelet count ratio (>0.06), the patients were assigned 0 point for having the lower value of each variable and 1 point for having the upper value of each variable...
October 13, 2016: Biomarkers in Medicine
J N Seheult, D J Triulzi, L H Alarcon, J L Sperry, A Murdock, M H Yazer
BACKGROUND/OBJECTIVES: The safety of administering uncrossmatched, group O, cold-stored, whole blood (cWB) during civilian trauma resuscitation was evaluated. METHODS/MATERIALS: Male trauma patients with haemorrhage-induced hypotension who received leuko-reduced uncrossmatched group O+, low titer (<50) anti-A and -B, platelet-replete cWB during initial resuscitation were included. The biochemical markers of haemolysis (lactate dehydrogenase, total bilirubin, haptoglobin, creatinine, serum potassium) were measured on the day of cWB receipt (day 0), and over the next 2 days, reports of transfusion reactions and total blood product administration in first 24 h of admission were recorded...
October 12, 2016: Transfusion Medicine
Tao Yan, Poornima Venkat, Michael Chopp, Alex Zacharek, Ruizhuo Ning, Cynthia Roberts, Yi Zhang, Mei Lu, Jieli Chen
BACKGROUND AND PURPOSE: Comorbidity of diabetes mellitus and stroke results in worse functional outcome, poor long-term recovery, and extensive vascular damage. We investigated the neurorestorative effects and mechanisms of stroke treatment with human bone marrow-derived mesenchymal stromal cells (hMSCs) in type 2 diabetes mellitus (T2DM) rats. METHODS: Adult male Wistar rats were induced with T2DM, subjected to 2 hours of middle cerebral artery occlusion (MCAo) and treated via tail-vein injection with (1) PBS (n=8) and (2) hMSCs (n=10; 5×10(6)) at 3 days after MCAo...
October 11, 2016: Stroke; a Journal of Cerebral Circulation
Abhishek Mittal, Bimal K Agrawal, Bharatveer Manchanda
No abstract text is available yet for this article.
January 2016: Journal of the Association of Physicians of India
R N Sarkar, K Bhattacharya, M Banerjee
No abstract text is available yet for this article.
January 2016: Journal of the Association of Physicians of India
Da-Xiong Zeng
We read the article by Chung and colleagues with great interest [1]. The authors showed that elevated mean platelets volume (MPV) at admission was associated with poor neurological outcomes and mortality at 30 days. MPV levels might be a critical prognostic marker among resuscitated patients. It is an attractive result, but we have some minor criticisms about the study. This article is protected by copyright. All rights reserved.
October 11, 2016: Journal of Thrombosis and Haemostasis: JTH
Shira Toledano, Huayi Lu, Agustina Palacio, Boaz Kigel, Ofra Kessler, Gilad Allon, Yoreh Barak, Gera Neufeld, Shlomit Schaal
Abnormal subretinal choroidal neovascularization (CNV) is a major cause of blindness in exudative age-related macular degeneration (AMD). Current anti-angiogenic treatments by VEGF sequestering agents have been successful, but a significant proportion of patients do not respond well to these treatments, and the response of others diminishes over time, suggesting that additional anti-angiogenic agents that function by separate mechanisms may be of use to such patients. We have previously found that a point mutated form of semaphorin-3E resistant to cleavage by furin like pro-protein convertases (UNCL-Sema3E) displays potent anti-angiogenic properties...
October 7, 2016: Experimental Eye Research
Fuat H Saner, Carmen Kirchner
BACKGROUND: Patients with end-stage liver disease (ESLD) are assumed to be at high risk of bleeding when undergoing any kind of invasive intervention (any kind of operation, including transplantation or minimally invasive interventions). Both bleeding and thrombosis are associated with a poor outcome. METHODS: A selective literature research was conducted with the following key words: 'cirrhosis', 'coagulation', 'bleeding', 'INR' (international normalized ratio), 'aPTT' (activated partial thromboplastin time), and 'thrombocytopenia'...
August 2016: Visc Med
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