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Reticulated platelets

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https://www.readbyqxmd.com/read/29075447/stress-induced-changes-in-color-expression-mediated-by-iridophores-in-a-polymorphic-lizard
#1
Anna C Lewis, Katrina J Rankin, Andrew J Pask, Devi Stuart-Fox
Stress is an important potential factor mediating a broad range of cellular pathways, including those involved in condition-dependent (i.e., honest) color signal expression. However, the cellular mechanisms underlying the relationship between stress and color expression are largely unknown. We artificially elevated circulating corticosterone levels in male tawny dragon lizards, Ctenophorus decresii, to assess the effect of stress on the throat color signal. Corticosterone treatment increased luminance (paler throat coloration) and decreased the proportion of gray, thereby influencing the gray reticulations that produce unique patterning...
October 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29050503/reticulated-platelets-in-poorly-controlled-diabetes-a-new-era-in-the-management-of-residual-risk
#2
Peter J Grant
No abstract text is available yet for this article.
November 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/28939876/thrombopoietic-stimulating-activity-of-rhtyrrs-y341a
#3
Yu Jinchao, Zhang Yanling, Wang Xu, Zhao Bing, Ye Yuhao, Zhou Weiran, Sun Shaoyang, Ma Liyun, Shi Yun, Zhan Ling, Yu Min, Mo Wei
Tumor radiotherapy induces hematopoietic organ damage and reduces thrombocyte counts. Thrombocytopenia is a common disease. Some studies have shown that tRNA synthetase plays not only catalytic tRNA aminoacylation roles, but also functions similarly to cytokines. Recombinant human tyrosyl-tRNA synthetase with a mutated Y341A (rhTyrRS (Y341A)) promotes megakaryocyte migrate from bone marrow to peripheral blood. It would promote megakaryocytes in the lungs adhering to vascular endothelial cells and resulting in the platelet production...
September 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28932736/mean-platelet-volume-and-immature-platelet-fraction-in-autoimmune-disorders
#4
REVIEW
Deonilson Schmoeller, Maria Mercedes Picarelli, Terezinha Paz Munhoz, Carlos Eduardo Poli de Figueiredo, Henrique Luiz Staub
Mean platelet volume (MPV), measured using automated blood analysers, has been appraised as a potential biomarker in cardiovascular disease, diabetes mellitus, and cancer. The test, a useful tool in differentiation of thrombocytopenic states, has now been carried out for autoimmune disorders, but data are yet scarce. Controversial results have been obtained in systemic and organ-specific autoimmune disorders. Another test, the immature platelet fraction (IPF) reflects the amount of young, reticulated platelets...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28880458/determinants-of-platelet-count-in-pediatric-patients-with-congenital-cyanotic-heart-disease-role-of-immature-platelet-fraction
#5
Randa M Matter, Iman A Ragab, Alaa M Roushdy, Ahmed G Ahmed, Hanan H Aly, Eman A Ismail
OBJECTIVES: Congenital heart defects are common noninfectious causes of mortality in children. Bleeding and thrombosis are both limiting factors in the management of such patients. We assessed the frequency of thrombocytopenia in pediatric patients with congenital cyanotic heart disease (CCHD) and evaluated determinants of platelet count including immature platelet fraction (IPF) and their role in the pathogenesis of thrombocytopenia. METHODS: Forty-six children and adolescents with CCHD during pre-catheter visits were studied; median age was 20...
September 7, 2017: Congenital Heart Disease
https://www.readbyqxmd.com/read/28821815/epac1-deficient-mice-have-bleeding-phenotype-and-thrombocytes-with-decreased-gpib%C3%AE-expression
#6
Gyrid Nygaard, Lars Herfindal, Kathrine S Asrud, Ronja Bjørnstad, Reidun K Kopperud, Eystein Oveland, Frode S Berven, Lene Myhren, Erling A Hoivik, Turid Helen Felli Lunde, Marit Bakke, Stein O Døskeland, Frode Selheim
Epac1 (Exchange protein directly activated by cAMP 1) limits fluid loss from the circulation by tightening the endothelial barrier. We show here that Epac1(-/-) mice, but not Epac2(-/-) mice, have prolonged bleeding time, suggesting that Epac1 may limit fluid loss also by restraining bleeding. The Epac1(-/-) mice had deficient in vitro secondary hemostasis. Quantitative comprehensive proteomics analysis revealed that Epac1(-/-) mouse platelets (thrombocytes) had unbalanced expression of key components of the glycoprotein Ib-IX-V (GPIb-IX-V) complex, with decrease of GP1bβ and no change of GP1bα...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28648625/anti-erythrocyte-igg-in-hamsters-with-acute-experimental-infection-by-leptospira-interrogans-serovar-canicola
#7
Ânderson O Sobroza, Micheli M Pillat, Guilherme L Dorneles, Márcia S N Machado, Cássia B Silva, Letícia Petry, Andressa Schafer, Raqueli T França, Cinthia M de Andrade, Alfredo Q Antoniazzi, Alexandre A Tonin, Sonia T A Lopes
The aim of this study was to evaluate the behavior of erythrocyte and platelet, as immunological markers, as well as evaluate the involvement of these factors in hemolytic and hemorrhagic reactions in hamsters experimentally infected by Leptospira interrogans Serovar Canicola. Our experimental design was composed by two randomized groups: Infected Group (IG) (n = 12) and control group (CG) (n = 6). Ninety-six hours after the inoculation, the presence of immunoglobulins (IgG and IgM) and complement C3 levels, related to erythrocytes and platelets, was assessed...
June 23, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28639693/thromboelastography-may-predict-risk-of-grade-2-bleeding-in-thrombocytopenic-patients
#8
E N Opheim, T O Apelseth, S J Stanworth, G E Eide, T Hervig
BACKGROUND AND OBJECTIVES: Platelet count is used as a prophylactic platelet transfusion trigger, although evidence suggests that it is a poor predictor of bleeding. Thus, alternative tests are required. The primary objective of this study was to compare thromboelastography (TEG) parameters on days with and without bleeding symptoms. The secondary objectives were to investigate the relationship between TEG parameters and haematological variables, fever, C-reactive protein (CRP) and platelet transfusion...
August 2017: Vox Sanguinis
https://www.readbyqxmd.com/read/28615358/it-s-reticulated-diabetes-atherosclerosis-and-reticulated-platelets
#9
Kathryn Dupnik
New research describes regulatory pathways for reticulated thrombocytosis in a mouse model of diabetes.
June 14, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28504654/sugar-makes-neutrophils-rage-linking-diabetes-associated-hyperglycemia-to-thrombocytosis-and-platelet-reactivity
#10
Robert H Lee, Wolfgang Bergmeier
Diabetes mellitus is associated with an increased risk for cardiovascular disease, but the link between hyperglycemia and atherothrombotic disease is not completely understood. Patients with diabetes often show hyporesponsiveness to antiplatelet therapies, and it has been suggested that hyperreactive reticulated platelets underlie this altered therapeutic response. In this issue of the JCI, Kraakman et al. uncover a previously unknown link between hyperglycemia and enhanced platelet production and reactivity...
June 1, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28504650/neutrophil-derived-s100-calcium-binding-proteins-a8-a9-promote-reticulated-thrombocytosis-and-atherogenesis-in-diabetes
#11
Michael J Kraakman, Man Ks Lee, Annas Al-Sharea, Dragana Dragoljevic, Tessa J Barrett, Emilie Montenont, Debapriya Basu, Sarah Heywood, Helene L Kammoun, Michelle Flynn, Alexandra Whillas, Nordin Mj Hanssen, Mark A Febbraio, Erik Westein, Edward A Fisher, Jaye Chin-Dusting, Mark E Cooper, Jeffrey S Berger, Ira J Goldberg, Prabhakara R Nagareddy, Andrew J Murphy
Platelets play a critical role in atherogenesis and thrombosis-mediated myocardial ischemia, processes that are accelerated in diabetes. Whether hyperglycemia promotes platelet production and whether enhanced platelet production contributes to enhanced atherothrombosis remains unknown. Here we found that in response to hyperglycemia, neutrophil-derived S100 calcium-binding proteins A8/A9 (S100A8/A9) interact with the receptor for advanced glycation end products (RAGE) on hepatic Kupffer cells, resulting in increased production of IL-6, a pleiotropic cytokine that is implicated in inflammatory thrombocytosis...
June 1, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28406717/young-steady-state-rabbit-platelets-do-not-have-an-enhanced-capacity-to-expose-procoagulant-phosphatidylserine
#12
Emily C Reddy, Hong Wang, K W Annie Bang, Marian A Packham, Margaret L Rand
Platelets are recognized to be physiologically and functionally heterogeneous. An example of the diversity in reactivity is the formation of a distinct subpopulation of procoagulant phosphatidylserine (PS)-exposing platelets upon activation. Platelet age has been proposed as a determinant of platelet function, and it has been reported that young platelets are more reactive in exposing PS; using the same methodology of thiazole orange (TO) staining to distinguish young and old platelets, the percentages of procoagulant platelets produced by thrombin plus collagen activation of platelets from healthy controls were examined by flow cytometry...
April 13, 2017: Platelets
https://www.readbyqxmd.com/read/28388444/immature-platelet-fraction-and-the-extent-of-coronary-artery-disease-a-single-centre-study
#13
Monica Verdoia, Matteo Nardin, Roberta Rolla, Paolo Marino, Giorgio Bellomo, Harry Suryapranata, Giuseppe De Luca
BACKGROUND AND AIMS: Immature platelet fraction (IPF) represents the quote of younger and larger sized circulating platelets, a potential marker of platelet reactivity and major cardiovascular events. We aimed to assess the relationship between IPF levels and the prevalence and extent of coronary artery disease (CAD) in patients undergoing coronary angiography. METHODS: A cohort of consecutive patients undergoing coronary angiography in a single centre were included...
May 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28378905/measurements-of-immature-platelets-with-haematology-analysers-are-of-limited-value-to-separate-immune-thrombocytopenia-from-bone-marrow-failure
#14
Annalina Cybulska, Lisa Meintker, Jürgen Ringwald, Stefan W Krause
Detection of immature platelets in the circulation may help to dissect thrombocytopenia due to platelet destruction from bone marrow failure (BMF). We prospectively tested the predictive value of immature platelets, measured as immature platelet fraction (IPF) on the XE-5000 (Sysmex, Kobe, Japan) or percentage of reticulated platelets (rPT) on the CD Sapphire (Abbott Diagnostics, Santa Clara, CA, USA) to separate immune thrombocytopenia (ITP) from BMF (leukaemia, myelodysplastic syndrome, aplastic anaemia)...
May 2017: British Journal of Haematology
https://www.readbyqxmd.com/read/28279968/newly-formed-reticulated-platelets-undermine-pharmacokinetically-short-lived-antiplatelet-therapies
#15
COMPARATIVE STUDY
Paul C Armstrong, Thomas Hoefer, Rebecca B Knowles, Arthur T Tucker, Melissa A Hayman, Plinio M Ferreira, Melissa V Chan, Timothy D Warner
OBJECTIVE: Aspirin together with thienopyridine P2Y12 inhibitors, commonly clopidogrel, is a cornerstone of antiplatelet therapy. However, many patients receiving this therapy display high on-treatment platelet reactivity, which is a major therapeutic hurdle to the prevention of recurrent thrombotic events. The emergence of uninhibited platelets after thrombopoiesis has been proposed as a contributing factor to high on-treatment platelet reactivity. Here, we investigate the influences of platelet turnover on platelet aggregation in the face of different dual-antiplatelet therapy strategies...
May 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28229159/platelet-turnover-predicts-outcome-after-coronary-intervention
#16
Matthias K Freynhofer, Liana Iliev, Veronika Bruno, Miklos Rohla, Florian Egger, Thomas W Weiss, Wolfgang Hübl, Martin Willheim, Johann Wojta, Kurt Huber
Elevated platelet turnover contributes to high platelet reactivity. High platelet reactivity after percutaneous coronary intervention (PCI) is associated with major adverse cardiovascular events (MACE). The purpose of this study was to determine the prognostic value of platelet turnover and function with regard to MACE after PCI with stent implantation. In this prospective observational study, 486 consecutive patients after PCI on aspirin and clopidogrel were included to determine platelet turnover (mean platelet volume (MPV), reticulated platelet fraction (RPF)) and platelet function (multiple electrode aggregometry (MEA), vasodilator-stimulated phosphoprotein-phosphorylation (VASP-P) assay)...
May 3, 2017: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/27941280/rapidly-progressive-autoimmune-pancytopenia-successfully-treated-with-steroids
#17
Sachiko Mitani, Yukiko Okubo, Katsuyuki Nishi, Satoshi Takahashi, Kohei Tada, Kazuo Hatanaka, Hitomi Kaneko, Naoya Ukyo, Chisato Mizutani, Kazunori Imada
A 73-year-old woman was admitted to our hospital because of pancytopenia. Bone marrow aspiration showed increased cellularity with no dysplastic change. Laboratory tests revealed increased reticulated erythrocytes and reticulated platelets, positive direct Coombs test, and hemolysis. These findings led to the diagnosis of Evans syndrome. Relatively decreased mature neutrophils in the bone marrow aspirate raised the possibility of autoimmune neutropenia. Antineutrophil antibody was detected by the 6 cell-lineage immunofluorescence test, consistent with the diagnosis of autoimmune neutropenia...
2016: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/27568830/cold-plasma-reticulation-of-shape-memory-embolic-tissue-scaffolds
#18
Landon D Nash, Nicole C Docherty, Mary Beth B Monroe, Kendal P Ezell, James K Carrow, Sayyeda M Hasan, Akhilesh K Gaharwar, Duncan J Maitland
Polyurethane shape memory polymer (SMP) foams are proposed for use as thrombogenic scaffolds to improve the treatment of vascular defects, such as cerebral aneurysms. However, gas blown SMP foams inherently have membranes between pores, which can limit their performance as embolic tissue scaffolds. Reticulation, or the removal of membranes between adjacent foam pores, is advantageous for improving device performance by increasing blood permeability and cellular infiltration. This work characterizes the effects of cold gas plasma reticulation processes on bulk polyurethane SMP films and foams...
December 2016: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/27487961/impact-of-reticulated-platelets-on-antiplatelet-response-to-thienopyridines-is-independent-of-platelet-turnover
#19
Christian Stratz, Thomas Nührenberg, Michael Amann, Marco Cederqvist, Pascal Kleiner, Christian M Valina, Dietmar Trenk, Franz-Josef Neumann, Willibald Hochholzer
Reticulated platelets are associated with impaired antiplatelet response to thienopyridines. It is uncertain whether this interaction is caused by a decreased drug exposure due to high platelet turnover reflected by elevated levels of reticulated platelets or by intrinsic properties of reticulated platelets. This study sought to investigate if the impact of reticulated platelets on early antiplatelet response to thienopyridines is mainly caused by platelet turnover as previously suggested. Elective patients undergoing coronary intervention were randomised to loading with clopidogrel 600 mg or prasugrel 60 mg (n=200)...
August 4, 2016: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/27449509/optimized-gating-and-reference-ranges-of-reticulated-platelets-in-dogs-for-the-sysmex-xt-2000iv
#20
Dana E Oellers, Natali Bauer, Melanie Ginder, Sigrid Johannes, Iris Pernecker, Andreas Moritz
BACKGROUND: Canine reticulated platelets (r-PLTs) i.e., juvenile PLTs reflecting thrombopoiesis can be measured automatically with the hematology analyzer Sysmex XT-2000iV using manual gating options. However, the impact of interferences on r-PLT measurements performed with the gates published previously (Pankraz et al., Vet Clin Path 38:30-38, 2009; Gelain et al., High fluorescent platelets fraction in macrothrombocytopenic Norfolk terrier, 2010) is largely unknown. The aim was to compare different published gates for measurement of r-PLTs with the Sysmex XT-2000iV with an own, optimized gate ("Oellers-gate") and to establish reference intervals (RIs) in > 120 dogs...
July 22, 2016: BMC Veterinary Research
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