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Platelet microparticles

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https://www.readbyqxmd.com/read/28214553/mimicking-oxygen-delivery-and-waste-removal-functions-of-blood
#1
Huaifa Zhang, Jake E Barralet
In addition to immunological and wound healing cell and platelet delivery, ion stasis and nutrient supply, blood delivers oxygen to cells and tissues and removes metabolic wastes. For decades researchers have been trying to develop approaches that mimic these two immediately vital functions of blood. Oxygen is crucial for the long-term survival of tissues and cells in vertebrates. Hypoxia (oxygen deficiency) and even at times anoxia (absence of oxygen) can occur during organ preservation, organ and cell transplantation, wound healing, in tumors and engineering of tissues...
February 15, 2017: Advanced Drug Delivery Reviews
https://www.readbyqxmd.com/read/28210898/flow-cytometric-analysis-reveals-the-high-levels-of-platelet-activation-parameters-in-circulation-of-multiple-sclerosis-patients
#2
Agnieszka Morel, Joanna Rywaniak, Michał Bijak, Elżbieta Miller, Marta Niwald, Joanna Saluk
The epidemiological studies confirm an increased risk of cardiovascular disease in multiple sclerosis, especially prothrombotic events directly associated with abnormal platelet activity. The aim of our study was to investigate the level of blood platelet activation in the circulation of patients with chronic phase of multiple sclerosis (SP MS) and their reactivity in response to typical platelets' physiological agonists. We examined 85 SP MS patients diagnosed according to the revised McDonald's criteria and 50 healthy volunteers as a control group...
February 16, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28207887/platelet-monocyte-derived-and-tissue-factor-carrying-circulating-microparticles-are-related-to-acute-myocardial-infarction-severity
#3
Gemma Chiva-Blanch, Kristian Laake, Peder Myhre, Vibeke Bratseth, Harald Arnesen, Svein Solheim, Lina Badimon, Ingebjørg Seljeflot
OBJECTIVE: Circulating microparticles (cMPs) are phospholipid-rich vesicles released from cells when activated or injured, and contribute to the formation of intracoronary thrombi. Tissue factor (TF, CD142) is the main trigger of fibrin formation and TF-carrying cMPs are considered one of the most procoagulant cMPs. Similar types of atherosclerotic lesions may lead to different types of AMI, although the mechanisms behind are unresolved. Therefore, we aimed to investigate the phenotype of cMPs found in plasma of ACS patients and its relation to AMI severity and thrombotic burden...
2017: PloS One
https://www.readbyqxmd.com/read/28168784/platelet-derived-microparticles-and-soluble-factors-differentially-regulate-human-endometrial-epithelial-cell-movement
#4
Koh Suginami, Yukiyasu Sato, Akihito Horie, Hisanori Matsumoto, Hirohiko Tani, Yasunari Mizumoto, Masanori Ono, Ayumi Matsuoka, Satoru Kyo, Yoshihiko Araki, Ikuo Konishi, Hiroshi Fujiwara
PROBLEM: We previously proposed that platelets promote re-epithelialization during menstruation. As cell movement is one of the important cell behaviors in the process of tissue remodeling, we examined the effects of platelets on endometrial epithelial cell invasion. METHOD OF STUDY: The platelets were isolated from healthy women. Using a human endometrial epithelial cell-derived immortalized cell line, EM-E6/E7/hTERT cells, we examined the effects of platelets and platelet-derived condition media with or without microparticles on the morphological and invasive properties of EM-E6/E7/hTERT cells...
February 7, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28168351/circulating-microparticles-and-the-risk-of-thromboembolic-events-in-egyptian-beta-thalassemia-patients
#5
Ilham Youssry, Nohair Soliman, Mona Ghamrawy, Rania Mohamed Samy, Amal Nasr, Mohamed Abdel Mohsen, Mohamed ElShahaat, Rayan Bou Fakhredin, Ali Taher
The presence of elevated numbers of circulating microparticles (MPs) has been hypothesized to be responsible for the occurrence of thromboembolic events (TEEs) in thalassemic patients. Our aim is to evaluate the presence and the thrombotic risk of circulating MPs in thalassemia patients and to determine the difference in MPs between β-thalassemia major (β-TM) and thalassemia intermedia (TI). The percentage of the annexin-labeled MPs, platelet-derived MPs (PMPs), erythrocyte-derived MPs (RMPs), and endothelial-derived MPs (EMPs) was measured by flow cytometry, in 87 thalassemia patients (39 β-TM and 48 TI)...
February 7, 2017: Annals of Hematology
https://www.readbyqxmd.com/read/28164307/how-to-quantify-microparticles-in-rbcs-a-validated-flow-cytometry-method-allows-the-detection-of-an-increase-in-microparticles-during-storage
#6
Clémentine Gamonet, Guillaume Mourey, Sophie Aupet, Sabéha Biichle, Régis Petitjean, Chrystelle Vidal, Aurore Pugin, Christian Naegelen, Pierre Tiberghien, Pascal Morel, Fanny Angelot-Delettre, Estelle Seilles, Philippe Saas, Laurent Bardiaux, Francine Garnache-Ottou
BACKGROUND: The procoagulant and proinflammatory microparticles (MPs) released during storage of packed red blood cells (pRBCs) can potentially modify transfusion benefits. A robust method to quantify MPs in pRBCs is needed to evaluate their impact in clinical trials. STUDY DESIGN AND METHODS: The objective was to validate the preanalytic conditions required to prepare pRBC supernatant as well as a method to quantify and evaluate MP variations over 42 days of pRBC storage...
February 5, 2017: Transfusion
https://www.readbyqxmd.com/read/28150804/extracellular-vesicles-in-coronary-artery-disease
#7
REVIEW
Chantal M Boulanger, Xavier Loyer, Pierre-Emmanuel Rautou, Nicolas Amabile
Membrane vesicles released in the extracellular space are composed of a lipid bilayer enclosing soluble cytosolic material and nuclear components. Extracellular vesicles include apoptotic bodies, exosomes, and microvesicles (also known previously as microparticles). Originating from different subcellular compartments, the role of extracellular vesicles as regulators of transfer of biological information, acting locally and remotely, is now acknowledged. Circulating vesicles released from platelets, erythrocytes, leukocytes, and endothelial cells contain potential valuable biological information for biomarker discovery in primary and secondary prevention of coronary artery disease...
February 2, 2017: Nature Reviews. Cardiology
https://www.readbyqxmd.com/read/28139770/platelet-activation-determines-the-severity-of-thrombocytopenia-in-dengue-infection
#8
Amrita Ojha, Dipika Nandi, Harish Batra, Rashi Singhal, Gowtham K Annarapu, Sankar Bhattacharyya, Tulika Seth, Lalit Dar, Guruprasad R Medigeshi, Sudhanshu Vrati, Naval K Vikram, Prasenjit Guchhait
Thrombocytopenia is common in patients with dengue virus (DENV) infections. With a focus on understanding the possible mechanism of thrombocytopenia in DENV infections we described a direct correlation between activation and depletion of platelets in patients. Our data showed a sharp decrease in platelet counts at day 4 of fever in patients. The high DENV genome copies in platelets correlated directly with the elevated platelet activation along with increased binding of complement factor C3 and IgG on their surface at day 4...
January 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28130196/cyclodextrin-mediated-self-associating-chitosan-micro-platelets-act-as-a-drug-booster-against-candida-glabrata-mucosal-infection-in-immunocompetent-mice
#9
Tiphany Grisin, Christian Bories, Philippe M Loiseau, Kawthar Bouchemal
This study reports design and evaluation of chitosan-based microparticle activity against Candida glabrata in vitro and in vivo in immunocompetent mice model artificially maintained in oestrus state. Because their flattened shape, chitosan microparticles are called here micro-platelets. They were obtained by self-association of oleoyl chitosan and α-cyclodextrin in water. A mixture of amphotericin B-deoxycholate (Fungizone(®), AmB-DOC) and chitosan micro-platelets gelified with pluronic(®) F127 (20wt%) completely cured C...
January 24, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28123709/bio-maleimide-stained-plasma-microparticles-can-be-purified-in-a-native-state-and-target-human-proximal-tubular-hk2-cells
#10
Mohammad J Alkhatatbeh, Lisa F Lincz, Rick F Thorne
Plasma microparticles (MPs) are heterogeneously sized submicron extracellular vesicles that originate from the cell membrane as a result of cell activation or apoptosis. Circulating MPs express cell-specific molecules that reflect their cell of origin and they are increasingly investigated for their potential role in intercellular communication. The aim of the current study was to determine if size exclusion chromatography could be used to purify fluorescent-labeled MPs in sufficient concentrations to be used experimentally in cell binding assays...
January 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28118643/the-association-of-baseline-and-longitudinal-change-in-endothelial-microparticle-count-with-mortality-in-chronic-kidney-disease
#11
Darren Green, Sarah Skeoch, M Yvonne Alexander, Philip A Kalra, Ben Parker
BACKGROUND: Chronic kidney disease (CKD) is associated with a unique milieu of vascular pathology, and effective biomarkers of active vascular damage are lacking. A candidate biomarker is the quantification of circulating endothelial microparticles (EMPs). This study observed baseline and longitudinal EMP change (δEMP) and established the association of these with all-cause mortality and cardiovascular events in CKD. METHOD: An observational study in adults with CKD (estimated glomerular filtration rate [eGFR] <60 mL/min/1...
January 25, 2017: Nephron
https://www.readbyqxmd.com/read/28110355/venous-gas-emboli-are-involved-in-post-dive-macro-but-not-microvascular-dysfunction
#12
Kate Lambrechts, Costantino Balestra, Michaël Theron, Anne Henckes, Hubert Galinat, Fanny Mignant, Marc Belhomme, Jean-Michel Pontier, François Guerrero
PURPOSE: Previous studies have shown vascular dysfunction of main conductance arteries and microvessels after diving. We aim to evaluate the impact of bubble formation on vascular function and haemostasis. To achieve this, we used a vibration preconditioning to influence bubble levels without changing any other parameters linked to the dive. METHODS: Twentty-six divers were randomly assigned to one of three groups: (1) the "vibrations-dive" group (VD; n = 9) was exposed to a whole-body vibration session 30 min prior the dive; (2) the "diving" group (D; n = 9) served as a control for the effect of the diving protocol; (3) The "vibration" protocol (V; n = 8) allowed us to assess the effect of vibrations without diving...
January 21, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28102737/platelet-microvesicles-in-health-and-disease
#13
Imene Melki, Nicolas Tessandier, Anne Zufferey, Eric Boilard
Interest in cell-derived extracellular vesicles and their physiological and pathological implications is constantly growing. Microvesicles, also known as microparticles, are small extracellular vesicles released by cells in response to activation or apoptosis. Among the different microvesicles present in the blood of healthy individuals, platelet-derived microvesicles (PMVs) are the most abundant. Their characterization has revealed a heterogeneous cargo that includes a set of adhesion molecules. Similarly to platelets, PMVs are also involved in thrombosis through support of the coagulation cascade...
January 19, 2017: Platelets
https://www.readbyqxmd.com/read/28099120/the-clinical-significance-of-platelet-microparticle-associated-micrornas
#14
Patrick Provost
Circulating blood platelets play a central role in the maintenance of hemostasis. They adhere to subendothelial extracellular matrix proteins that become exposed upon vessel wall damage, which is followed by platelet activation, further platelet recruitment, platelet aggregation and formation of an occlusive, or non-occlusive, platelet thrombus. Platelets host a surprisingly diverse transcriptome, which is comprised of ~9500 messenger RNAs (mRNAs) and different classes of non-coding RNAs, including microRNAs, as well as a significant repertoire of proteins that contribute to their primary (adhesion, aggregation, granule secretion) and alternative (RNA transfer, mRNA translation, immune regulation) functions...
January 18, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28089410/microparticle-detection-to-guide-platelet-management-for-the-reduction-of-platelet-refractoriness-in-children-a-study-proposal
#15
REVIEW
Peter Kanzler, Andrew Mahoney, Gerda Leitner, Volker Witt, Elisabeth Maurer-Spurej
Microparticles have been shown to shed from a variety of viable cells as a consequence of inflammatory processes, activation or physical stress. Seventy to 90% of circulating microparticles are thought to be platelet-derived. The content of microparticles in blood collected from normal blood donors is highly variable and transfers into the final blood component. Elevated microparticle content (MPC) in donor blood might indicate an asymptomatic clinical condition of the donor which might affect the transfusion recipient, particularly pediatric patients...
December 29, 2016: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28088464/microparticles-inflammatory-and-haemostatic-biomarkers-in-polycystic-ovary-syndrome
#16
L M L Carvalho, C N Ferreira, M O Sóter, M F Sales, K F Rodrigues, S R Martins, A L Candido, F M Reis, I F O Silva, F M F Campos, K B Gomes
Polycystic Ovary Syndrome (PCOS) is associated with a chronic low-grade inflammation and predisposition to hemostatic and atherosclerotic complications. This case-control study evaluated the microparticles (MPs) profile in patients with the PCOS and related these MPs to clinical and biochemical parameters. MPs derived from platelets (PMPs), leuckocytes (LMPs) and endothelial cells (EMPs) were evaluated, as well as MPs expressing tissue factor (TFMPs), by flow cytometry, comparing women with PCOS (n = 50) and a healthy control group (n = 50)...
January 11, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28058691/platelet-subpopulation-bearing-leukocyte-specific-antigen-and-tissue-factor
#17
Z A Gabbasov, O S Saburova, O A Antonova, N V Golubeva, S G Khaspekova, O N Shustova, I T Zyuryaev, M Ya Ruda, A V Mazurov
Platelets bearing leukocyte antigen CD45 were identified in the blood of patients with myocardial infarction (MI) and healthy donors by flow cytofluorimetry. Part of these platelets contained tissue factor (TF)-primary initiator of blood clotting. The number of CD45(+) and CD45(+)/TF(+) platelets in MI patients at the first day was comparable with their level in healthy donors, but was increased at 8-12 days after MI onset. At that time in some patients the amount of CD45(+) and CD45(+)/TF(+) platelets reached 5-6 and 2-3% of their total number...
November 2016: Doklady. Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28053878/microparticle-subpopulations-are-potential-markers-of-disease-progression-and-vascular-dysfunction-across-a-spectrum-of-connective-tissue-disease
#18
E M McCarthy, D Moreno-Martinez, F L Wilkinson, N J McHugh, I N Bruce, J D Pauling, M Y Alexander, B Parker
OBJECTIVE: Microparticles (MPs) are membrane-bound vesicles derived from vascular and intravascular cells such as endothelial cells (EMPs) and platelets (PMPs). We investigated EMP and PMP numbers across a spectrum of autoimmune rheumatic diseases (AIRDs) with the aim of comparing the levels of, and relationship between, EMPs and PMPs. METHODS: Patients with Systemic Lupus Erythematosus (SLE) (n = 24), Systemic Sclerosis (SSc) (n = 24), Primary Raynauds Phenomenon (RP) (n = 17) and "other CTD" (n = 15) (Primary Sjogrens Syndrome, UCTD or MCTD) as well as 15 healthy controls were recruited...
June 2017: BBA Clinical
https://www.readbyqxmd.com/read/28052584/activated-platelet-derived-and-leukocyte-derived-circulating-microparticles-and-the-risk-of-thrombosis-in-heparin-induced-thrombocytopenia-a-role-for-pf4-bearing-microparticles
#19
Elena Campello, Claudia M Radu, Elena Duner, Anna M Lombardi, Luca Spiezia, Raffaele Bendo, Silvia Ferrari, Paolo Simioni, Fabrizio Fabris
BACKGROUND: Though the presence of platelets-derived microparticles (MPs) have previously been described in heparin-induced thrombocytopenia (HIT), the mechanism of thrombosis in HIT remains poorly understood. We aimed to assess the presence and origin of MPs in patients with HIT and their possible contribution to HIT with thrombosis (HITT). METHODS: Forty-five patients with HIT and 45 matched hospitalized patients with not confirmed HIT (HIT-negative) were enrolled...
January 3, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/28039962/association-of-ficolin-3-with-abdominal-aortic-aneurysm-presence-and-progression
#20
Carlos-Ernesto Fernandez-García, Elena Burillo, Jes S Lindholt, Diego Martinez-Lopez, Katrine Pilely, Carla Mazzeo, Jean-Baptiste Michel, Jesus Egido, Peter Garred, Luis M Blanco-Colio, Jose L Martin-Ventura
BACKGROUND: Abdominal aortic aneurysm (AAA) patients are usually asymptomatic and AAA evolution is unpredictable. Ficolin-3, mainly synthesized by the liver, is a molecule of the lectin complement-activation pathway involved in AAA pathophysiology. OBJECTIVES: To define extrahepatic sources of ficolin-3 in AAA, and investigate the role of ficolin-3 as a biomarker of AAA presence and progression. METHODS: Microvesicles (exosomes and microparticles) were isolated from culture conditioned medium of ADP-activated platelets, as well as from AAA tissue-conditioned medium (thrombus and wall)...
December 31, 2016: Journal of Thrombosis and Haemostasis: JTH
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