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https://www.readbyqxmd.com/read/29150436/microvesicles-derived-from-human-wharton-s-jellymesenchymal-stem-cells-ameliorate-ischemia-reperfusion-induced-renal-fibrosis-by-releasing-from-g2-m-cell-cycle-arrest
#1
Wenxia Chen, Yongbin Yan, Chundong Song, Ying Ding, Tao Du
Studies have demonstrated that microvesicles (MVs) derived from human Wharton's Jelly mesenchymal stromal cells (hWJMSCs) could ameliorate renal ischemia/reperfusion injury (IRI), however, the underlying mechanisms were not clear yet. Here, MVs were isolated and injected intravenously into rats immediately after ischemia of the left kidney, and Erk1/2 activator HGF or inhibitor U0126 was administrated, respectively. Tubular cell proliferation and apoptosis were identified by Ki67 or TUNEL immunostaining. Masson's tri-chrome straining and alpha-smooth muscle actin (α -SMA) staining were used for assessing renal fibrosis...
November 17, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/29148239/metabolic-signature-of-microvescicles-from-umbilical-cord-mesenchimal-stem-cells-of-preterm-and-term-infants
#2
Maurizio Bruschi, Laura Santucci, Silvia Ravera, Martina Bartolucci, Andrea Petretto, Daniela Calzia, Gianmarco Ghiggeri, Luca A Ramenghi, Giovanni Candiano, Isabella Panfoli
PURPOSE: Microvesicles, 200-1000 nm bodies budding from the cell plasma membrane, are a promising source of biomarkers. This study aimed at comparing the proteome of Microvesicles collected by ultracentrifugation from cultured Mesenchymal Stem Cells from Human Umbilical Cord of Preterm newborns(<34-weeks gestational age) in comparison to infants at Term(≥37 weeks). This discovery study was designed to establish the signature of prematurity. EXPERIMENTAL DESIGN: Orbitrap mass spectrometry, statistical, bioinformatics and biochemical analyses were employed...
November 16, 2017: Proteomics. Clinical Applications
https://www.readbyqxmd.com/read/29147088/evaluation-and-characterization-of-milk-derived-microvescicle-isolated-from-bovine-colostrum
#3
Brighton E Maburutse, Mi-Ri Park, Sangnam Oh, Younghoon Kim
Extracellular microvesicles are membranous nano-sized cellular organelles secreted by a variety of cells under normal and pathological conditions and heterogeneous in size ranging from 30 nm to 1 μm. They carry functional microRNAs that can influence immunity and development. For a particular application of microvesicles, choice of isolation method is particularly important; however, their isolation methods from colostrum in particular have not been described clearly. In this work, differential ultracentrifugation as a conventional method, ultracentrifugation with some modification such as additional precipitations, ultrafiltration, sucrose gradient separation and ExoQuick™ as a commercial reagent were compared...
2017: Korean Journal for Food Science of Animal Resources
https://www.readbyqxmd.com/read/29146100/emerging-role-of-extracellular-vesicles-as-a-senescence-associated-secretory-phenotype-insights-into-the-pathophysiology-of-lung-diseases
#4
REVIEW
Tsukasa Kadota, Yu Fujita, Yusuke Yoshioka, Jun Araya, Kazuyoshi Kuwano, Takahiro Ochiya
Aging is a major risk factor for the development of chronic lung diseases such as chronic obstructive pulmonary disease (COPD), idiopathic pulmonary fibrosis (IPF), and lung cancer. A main aspect of aging is the impaired function of maintaining homeostasis in the organs and body, which is associated with cellular senescence. Cellular senescence is recognized as the state of irreversible cell cycle arrest in response to a variety of cellular stresses. Senescent cells are not simply cell cycle-arrested cells; they also affect bystander cells through the secretion of bioactive molecules, termed the senescence-associated secretory phenotype (SASP)...
November 13, 2017: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/29145392/conservation-of-a-microrna-cluster-in-parasitic-nematodes-and-profiling-of-mirnas-in-excretory-secretory-products-and-microvesicles-of-haemonchus-contortus
#5
Henry Y Gu, Neil D Marks, Alan D Winter, William Weir, Thomas Tzelos, Tom N McNeilly, Collette Britton, Eileen Devaney
microRNAs are small non-coding RNAs that are important regulators of gene expression in a range of animals, including nematodes. We have analysed a cluster of four miRNAs from the pathogenic nematode species Haemonchus contortus that are closely linked in the genome. We find that the cluster is conserved only in clade V parasitic nematodes and in some ascarids, but not in other clade III species nor in clade V free-living nematodes. Members of the cluster are present in parasite excretory-secretory products and can be detected in the abomasum and draining lymph nodes of infected sheep, indicating their release in vitro and in vivo...
November 16, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29137858/human-papillomavirus-e6-and-e7-oncoproteins-affect-the-cell-microenvironment-by-classical-secretion-and-extracellular-vesicles-delivery-of-inflammatory-mediators
#6
Marco Iuliano, Giorgio Mangino, Maria Vincenza Chiantore, Maria Simona Zangrillo, Rosita Accardi, Massimo Tommasino, Gianna Fiorucci, Giovanna Romeo
The connection between chronic inflammation and risk of cancer has been supported by several studies. The development of cancer might be a process driven by the presence of a specific combination of inflammatory mediators, including cytokines, chemokines and enzymes, in the tumor microenvironment. Virus-induced tumors, like HPV-induced Squamous Cell Carcinomas, represent a paradigmatic example of the interplay between inflammation, as integral part of the innate antiviral response, and malignant transformation...
November 11, 2017: Cytokine
https://www.readbyqxmd.com/read/29132390/a-transwell-assay-that-excludes-exosomes-for-assessment-of-tunneling-nanotube-mediated-intercellular-communication
#7
Venugopal Thayanithy, Patrick O'Hare, Phillip Wong, Xianda Zhao, Clifford J Steer, Subbaya Subramanian, Emil Lou
BACKGROUND: Tunneling nanotubes (TNTs) are naturally-occurring filamentous actin-based membranous extensions that form across a wide spectrum of mammalian cell types to facilitate long-range intercellular communication. Valid assays are needed to accurately assess the downstream effects of TNT-mediated transfer of cellular signals in vitro. We recently reported a modified transwell assay system designed to test the effects of intercellular transfer of a therapeutic oncolytic virus, and viral-activated drugs, between cells via TNTs...
November 13, 2017: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/29127866/placental-hypoxia-inducible-factor-1%C3%AE-chop-immuno-histochemical-expression-relative-to-maternal-circulatory-syncytiotrophoblast-micro-vesicles-in-preeclamptic-and-normotensive-pregnancies
#8
S Verma, P Pillay, T Naicker, J Moodley, I Mackraj
OBJECTIVES: Preeclampsia (PE) occurs as a result placental hypoxia-induced oxidative and endoplasmic reticulum stress, and is associated with the activation of hypoxia inducible factor-1α (HIF-1α) and apoptotic CHOP pathways with the consequential shedding of syncytiotrophoblast microvesicles which may be central in mediating the maternal systemic immune response. The aim of this study was to immune-localise and morphometrically analyse CHOP and HIF-1α within the placenta of normotensive and pre-eclamptic pregnancies and concomitantly quantify syncytiotrophoblast released microvesicles in maternal circulation...
November 7, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/29125808/monocyte-derived-procoagulant-microvesicles-induced-by-high-glucose-can-be-attenuated-by-the-antioxidant-n-acetyl-l-cysteine-partly-through-the-p38-mapk-pathway
#9
Mingzhen Li, Xiao Zhang, Jing Yu, Xin Wu, Lirong Sun
BACKGROUND: Microvesicles (MVs) are small membrane vesicles that are derived from many different cell types by a process of exocytic budding of the plasma membrane. MVs may be associated with a higher incidence of vascular disease in diabetic patients, but the mechanism of this association is unclear. Diabetic patients also show hypercoagulability and platelet hyperaggregability. In this study, we investigated the generation and activity of high glucose (HG)-induced MVs from monocytes to elucidate the potential mechanism of such MVs in diabetes...
November 10, 2017: Metabolic Syndrome and related Disorders
https://www.readbyqxmd.com/read/29123650/transcellular-communication-at-the-immunological-synapse-a-vesicular-traffic-mediated-mutual-exchange
#10
REVIEW
Francesca Finetti, Chiara Cassioli, Cosima T Baldari
The cell's ability to communicate with the extracellular environment, with other cells, and with itself is a crucial feature of eukaryotic organisms. In the immune system, T lymphocytes assemble a specialized structure upon contact with antigen-presenting cells bearing a peptide-major histocompatibility complex ligand, known as the immunological synapse (IS). The IS has been extensively characterized as a signaling platform essential for T-cell activation. Moreover, emerging evidence identifies the IS as a device for vesicular traffic-mediated cell-to-cell communication as well as an active release site of soluble molecules...
2017: F1000Research
https://www.readbyqxmd.com/read/29122961/whole-body-heat-stress-and-exercise-stimulate-the-appearance-of-platelet-microvesicles-in-plasma-with-limited-influence-of-vascular-shear-stress
#11
Eurico N Wilhelm, José González-Alonso, Scott T Chiesa, Steven J Trangmar, Kameljit K Kalsi, Mark Rakobowchuk
Intense, large muscle mass exercise increases circulating microvesicles, but our understanding of microvesicle dynamics and mechanisms inducing their release remains limited. However, increased vascular shear stress is generally thought to be involved. Here, we manipulated exercise-independent and exercise-dependent shear stress using systemic heat stress with localized single-leg cooling (low shear) followed by single-leg knee extensor exercise with the cooled or heated leg (Study 1, n = 8) and whole-body passive heat stress followed by cycling (Study 2, n = 8)...
November 2017: Physiological Reports
https://www.readbyqxmd.com/read/29122211/citrate-dialysate-does-not-induce-oxidative-stress-or-inflammation-in-vitro-as-compared-to-acetate-dialysate
#12
Rafael Pérez-García, Rafael Ramírez Chamond, Patricia de Sequera Ortiz, Marta Albalate, Marta Puerta Carretero, Mayra Ortega, M Caridad Ruiz Caro, Roberto Alcazar Arroyo
Increased acetataemia during haemodialysis sessions has been associated with a number of abnormalities, including increased oxidative stress, pro-inflammatory cytokines and nitric oxide synthesis. However, citric acid may play an alternative role to acetate as a dialysate stabiliser given that the effect of citrate on complement and leukocyte activation is different to that of acetate. The purpose of this study was to compare the inflammatory effect in immunocompetent blood cells of acetate dialysate and citrate dialysate...
November 2017: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
https://www.readbyqxmd.com/read/29120945/a-comparison-of-red-cell-rejuvenation-versus-mechanical-washing-for-the-prevention-of-transfusion-associated-organ-injury-in-swine
#13
Marcin J Woźniak, Saqib Qureshi, Nikol Sullo, William Dott, Rebecca Cardigan, Michael Wiltshire, Mintu Nath, Nishith N Patel, Tracy Kumar, Alison H Goodall, Gavin J Murphy
BACKGROUND: We evaluated the effects of two interventions that modify the red cell storage lesion on kidney and lung injury in experimental models of transfusion. METHODS: White-landrace pigs (n = 32) were allocated to receive sham transfusion (crystalloid), 14-day stored allogeneic red cells, 14-day red cells washed using the red cells washing/salvage system (CATS; Fresenius, Germany), or 14-day red cells rejuvenated using the inosine solution (Rejuvesol solution; Zimmer Biomet, USA) and washed using the CATS device...
November 9, 2017: Anesthesiology
https://www.readbyqxmd.com/read/29116061/-exosomal-surface-protein-markers-in-diagnosis-of-colorectal-cancer
#14
E N Savvateeva, A A Tikhonov, V I Butvilovskaya, M V Tsybulskaya, A Yu Rubina
Colorectal cancer (CRC) is one of the most common primary malignancies. Early stages of the disease are asymptomatic in the majority of cases, leading to late detection and high mortality. Available noninvasive diagnostic techniques are limited in sensitivity and specificity, and designing new ones is still a pressing problem. Exosomes are membrane-derived microvesicles secreted into human biological fluids and provide a novel way to assess the course of an oncology disease. The review describes the repertoire of exosomal surface biomarkers found in the blood of CRC patients and the prospects of employing multiplexed tests for exosomal markers in early noninvasive diagnosis of cancer...
September 2017: Molekuliarnaia Biologiia
https://www.readbyqxmd.com/read/29115853/extracellular-vesicles-new-players-in-lung-immunity
#15
Yu Fujita, Tsukasa Kadota, Jun Araya, Takahiro Ochiya, Kazuyoshi Kuwano
Extracellular vesicles (EVs), such as exosomes and microvesicles, play an important autocrine/paracrine role in intercellular communication. Details on the involvement of EVs in the pathogenesis of lung diseases have emerged over the past several years. Moreover, EVs package numerous DNA, proteins, mRNAs, and microRNAs (miRNAs) that can regulate immune responses in recipient cells. Almost all respiratory cells release EVs, and these EVs can have protective or detrimental functions depending on the type of donor cells, type of stimuli, and components...
November 8, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/29106545/extracellular-vesicles-in-diagnostics-and-therapy-of-the-ischaemic-heart-position-paper-from-the-working-group-on-cellular-biology-of-the-heart-of-the-european-society-of-cardiology
#16
Joost Petrus Gerardus Sluijter, Sean Michael Davidson, Chantal Marthe Boulanger, Edit Iren Buzás, Dominique Paschalis Victor de Kleijn, Felix Benedikt Engel, Zoltán Giricz, Derek J Hausenloy, Raj Kishore, Sandrine Lecour, Jonathan Leor, Rosalinda Madonna, Cinzia Perrino, Fabrice Prunier, Susmita Sahoo, Ray Michel Schiffelers, Rainer Schulz, Linda Wilhelmina Van Laake, Kirsti Ytrehus, Péter Ferdinandy
Extracellular vesicles (EVs) - particularly exosomes and microvesicles - are attracting considerable interest in the cardiovascular field as the wide range of their functions is recognized. These capabilities include transporting regulatory molecules including different RNA species, lipids, and proteins through the extracellular space including blood and delivering these cargos to recipient cells to modify cellular activity. EVs powerfully stimulate angiogenesis, and can protect the heart against myocardial infarction...
November 2, 2017: Cardiovascular Research
https://www.readbyqxmd.com/read/29101235/mechanisms-and-modulation-of-microvesicle-uptake-in-a-model-of-alveolar-cell-communication
#17
Daniel J Schneider, Jennifer M Speth, Loka R Penke, Scott H Wettlaufer, Joel A Swanson, Marc Peters-Golden
Extracellular vesicles (EVs), including exosomes and shed microvesicles (MVs), can be internalized by recipient cells to modulate function. Although the mechanism by which EVs are internalized is incompletely characterized, it is generally regarded to involve endocytosis and an initial surface binding event. Furthermore, modulation of uptake by microenvironmental factors is largely unstudied. Here we used flow cytometry, confocal microscopy, and pharmacologic and molecular targeting to address these gaps in knowledge in a model of pulmonary alveolar cell-cell communication...
November 3, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29099035/molecular-characterization-of-peripheral-extracellular-vesicles-in-clinically-isolated-syndrome-preliminary-suggestions-from-a-pilot-study
#18
Nicoletta Nuzziello, Maria Blonda, Flavio Licciulli, Sabino Liuni, Antonella Amoruso, Alessio Valletti, Arianna Consiglio, Carlo Avolio, Maria Liguori
Extracellular vesicles (EVs), nanoparticles originated from different cell types, seem to be implicated in several cellular activities. In the Central Nervous System (CNS), glia and neurons secrete EVs and recent studies have demonstrated that the intercellular communication mediated by EVs has versatile functional impact in the cerebral homeostasis. This essential role may be due to their proteins and RNAs cargo that possibly modify the phenotypes of the targeted cells. Despite the increasing importance of EVs, little is known about their fluctuations in physiological as well as in pathological conditions...
September 18, 2017: Medical Sciences: Open Access Journal
https://www.readbyqxmd.com/read/29084422/histological-evaluation-of-experimentally-induced-critical-size-defect-skin-wounds-using-exosomal-solution-of-mesenchymal-stem-cells-derived-microvesicles
#19
Omar S El-Tookhy, Ashraf A Shamaa, Gehan G Shehab, Ahmed N Abdallah, Omnia M Azzam
Background and Objectives: The present study investigated whether MSCs derived microvesicles (MVs) or (Exosomes) can exert therapeutic effects on an experimental model of cutaneous injury and explored the underlying involving mechanisms. Methods and Results: Three bilateral full thickness circular wounds were created on the back of two groups of dogs using 2-cm dermal punch. The wounds were at least 2.5 cm apart. Saline was subcutaneously injected in 4 places around each wound area in group-I (control), whereas an equal volume of exosomal solution of MSCs derived MVs was similarly injected in group-II...
October 31, 2017: International Journal of Stem Cells
https://www.readbyqxmd.com/read/29081510/isolation-and-characterization-of-urinary-extracellular-vesicles-implications-for-biomarker-discovery
#20
REVIEW
Michael L Merchant, Ilse M Rood, Jeroen K J Deegens, Jon B Klein
Urine is a valuable diagnostic medium and, with the discovery of urinary extracellular vesicles, is viewed as a dynamic bioactive fluid. Extracellular vesicles are lipid-enclosed structures that can be classified into three categories: exosomes, microvesicles (or ectosomes) and apoptotic bodies. This classification is based on the mechanisms by which membrane vesicles are formed: fusion of multivesicular bodies with the plasma membranes (exosomes), budding of vesicles directly from the plasma membrane (microvesicles) or those shed from dying cells (apoptotic bodies)...
December 2017: Nature Reviews. Nephrology
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