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https://www.readbyqxmd.com/read/28429220/antithrombin-activity-of-erythrocyte-microvesicles
#1
G Ya Levin, E G Sukhareva
Coagulation and optical (based on chromogenic substrate) methods were employed to examine antithrombin activity of erythrocytes and erythrocyte-derived microvesicles isolated days 7, 14, 21, and 28 on erythrocyte storage. The erythrocyte-derived microvesicles decelerated fibrin clot formation from fibrinogen in the presence of exogenous thrombin both with and without heparin. Microvesicles reduced optical density of chromogenic substrate. These data suggest that erythrocyte-derived microvesicles display a prominent antithrombin activity, which significantly increases during erythrocyte storage...
April 21, 2017: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28427235/catan-ionic-hybrid-lipidic-nano-carriers-for-enhanced-bioavailability-and-anti-tumor-efficacy-of-chemodrugs
#2
Bilin Liu, Dan He, Jianyong Wu, Quan Sun, Mi Zhang, Qunyou Tan, Yao Li, Jingqing Zhang
To date there has not been any report on catan-ionic hybrid lipidic nano-carriers, let alone a report on applying them to deliver insoluble anti-tumor drugs. Catan-ionic hybrid lipidic nano-carriers containing curcumin (CUR-C-HLN) inherit the merits of catan-ionic systems, hybrid lipidic systems and nano-structured carriers (the second-generation substitute of solid lipidic nano-systems). Catan-ionic surfactants increased microvesicle stabilization by producing unordered isometric clusters, enhanced absorptive amount as an inhibitor of enzyme and protein, improved tumor accumulation by cellular endocytosis and membranous fusion; hybrid lipids helped to obtain high drug content and low leakage by forming a less-organized matrix arrangement...
March 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28423667/saline-is-a-more-appropriate-solution-for-microvesicles-for-flow-cytometric-analyses
#3
Xing Xin, Peiling Zhang, Xing Fu, Xia Mao, Fankai Meng, Ming Tian, Xiaojian Zhu, Hanying Sun, Li Meng, Jianfeng Zhou
Microvesicles (MVs) are carriers of molecular and oncogenic signatures present in subsets of tumor cells and tumor-associated stroma, and a focus of cancer research. Although methods to detect MVs are mature, we were concerned that the buffer used could lead to false results when quantitating MVs by flow cytometry. In this work,we detected MVs by flow cytometry withthree different solutions: water, saline, and phosphate-buffered saline (PBS). The results demonstrated that PBS, when reacted with annexin V binding buffer, produced nano-sized vesicles even when there were no MVs in the sample...
March 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28414289/-isolation-and-characterization-of-exosomes-from-blood-plasma-of-breast-cancer-and-colorectal-cancer-patients
#4
S N Tamkovich, N V Yunusova, М N Stakheeva, A K Somov, А Y Frolova, N А Kirushina, S G Afanasyev, А E Grigoryeva, P P Laktionov, I V Kondakova
A simple approach for isolation of exosomes from the blood plasma, which allows to obtain highly purified preparations of microvesicles no larger than 100 nm has been proposed. The presence of different subpopulations of exosomes in the blood plasma of healthy donors and cancer patients has been recognized. We found the presence of the universal markers CD9, CD24 and CD81 on exosomes isolated from blood plasma that can be used to their routine typing.
March 2017: Biomedit︠s︡inskai︠a︡ Khimii︠a︡
https://www.readbyqxmd.com/read/28408397/the-il-31-il-31-receptor-axis-general-features-and-role-in-tumor-microenvironment
#5
REVIEW
Elisa Ferretti, Anna Corcione, Vito Pistoia
IL-31 is a recently identified cytokine with a well-defined role in the pathogenesis of pruritus. IL-31, whose production is induced by IL-4 and IL-33, binds a heterodimeric receptor (R) composed of the exclusive IL-31RA chain and the shared oncostatin M R. Signaling through the IL-31R involves the MAPK, PI3K/AKT and Jak/STAT pathways. Different variants and isoforms of IL-31RA with different signaling activities have been identified. IL-31 is produced predominantly by circulating Th2 lymphocytes and skin-homing CLA(+)CD45RO(+) T cells...
April 13, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28405179/a-review-of-studies-of-the-proteomes-of-circulating-microparticles-key-roles-for-galectin-3-binding-protein-expressing-microparticles-in-vascular-diseases-and-systemic-lupus-erythematosus
#6
REVIEW
Christoffer T Nielsen, Ole Østergaard, Niclas S Rasmussen, Søren Jacobsen, Niels H H Heegaard
Subcellular microvesicles (MVs) have attracted increasing interest during the past decades. While initially considered as inert cellular debris, several important roles for MVs in physiological homeostasis, cancer, cardiovascular, and autoimmune diseases have been uncovered. Although still poorly understood, MVs are involved in trafficking of information from cell-to-cell, and are implicated in the regulation of immunity, thrombosis, and coagulation. Different subtypes of extracellular MVs exist. This review focuses on the cell membrane-derived shedded MVs (ranging in size from 200 to 1000 nm) typically termed microparticles (MPs)...
2017: Clinical Proteomics
https://www.readbyqxmd.com/read/28398146/protective-action-of-b1r-antagonist-against-cerebral-ischemia-reperfusion-injury-through-suppressing-mir-200c-expression-of-microglia-derived-microvesicles
#7
Min Tang, Ping Liu, Xia Li, Jian-Wen Wang, Xiong-Chao Zhu, Fang-Ping He
BACKGROUND AND OBJECTIVE: Cerebral ischemia-reperfusion (I/R) injury is a common side-effect for cerebral ischemic disease and its therapeutic regimen is limited. Kinin is pro-inflammatory peptide that is released and acts at the site of injury and inflammation such as brain and it works through bradykinin 1 receptor (B1R). The present study was to examine the effect of B1R antagonist on cerebral I/R injury and the potential mechanism. METHODS: Cerebral I/R injury was induced in mice by transient middle cerebral artery occlusion (MCAO)...
April 11, 2017: Neurological Research
https://www.readbyqxmd.com/read/28397044/interferon-%C3%AE-alters-the-immune-related-mirna-expression-of-microvesicles-derived-from-mesenchymal-stem-cells
#8
Ai-Qi Zhao, Hui Xie, Sheng-Yan Lin, Qian Lei, Wen-Xiang Ren, Fei Gao, Hao Guo, An-Yuan Guo, Zhi-Chao Chen, Hong-Xiang Wang
Increasing studies have demonstrated that interferon gamma (IFN-γ), which serves as a critical inflammatory cytokine, is essential to induce the immunosuppressive effects of mesenchymal stem cells (MSCs). However, the mechanisms underlying the enhanced immunosuppressive effects of IFN-γ-stimulated MSCs (γMSCs) are not fully understood. MSC-derived microvesicles (MSC-MVs) have been viewed as potential pivotal mediators of the immunosuppressive effects of MSCs. Moreover, microRNAs (miRNAs) are important regulators of immunological processes and can be shuttled from cell to cell by MVs...
April 2017: Journal of Huazhong University of Science and Technology. Medical Sciences
https://www.readbyqxmd.com/read/28391377/pro-angiogenic-capacities-of-microvesicles-produced-by-skin-wound-myofibroblasts
#9
Mays Merjaneh, Amélie Langlois, Sébastien Larochelle, Chanel Beaudoin Cloutier, Sylvie Ricard-Blum, Véronique J Moulin
Wound healing is a very highly organized process where numerous cell types are tightly regulated to restore injured tissue. Myofibroblasts are cells that produce new extracellular matrix and contract wound edges. We previously reported that the human myofibroblasts isolated from normal wound (WMyos) produced microvesicles (MVs) in the presence of the serum. In this study, MVs were further characterized using a proteomic strategy and potential functions of the MVs were determined. MV proteins isolated from six WMyo populations were separated using two-dimensional differential gel electrophoresis...
April 8, 2017: Angiogenesis
https://www.readbyqxmd.com/read/28387728/microvesicles-contribute-to-the-bystander-effect-of-dna-damage
#10
Xiaozeng Lin, Fengxiang Wei, Pierre Major, Khalid Al-Nedawi, Hassan A Al Saleh, Damu Tang
Genotoxic treatments elicit DNA damage response (DDR) not only in cells that are directly exposed but also in cells that are not in the field of treatment (bystander cells), a phenomenon that is commonly referred to as the bystander effect (BE). However, mechanisms underlying the BE remain elusive. We report here that etoposide and ultraviolet (UV) exposure stimulate the production of microvesicles (MVs) in DU145 prostate cancer cells. MVs isolated from UV-treated DU145 and A431 epidermoid carcinoma cells as well as etoposide-treated DU145 cells induced phosphorylation of ataxia-telangiectasia mutated (ATM) at serine 1981 (indicative of ATM activation) and phosphorylation of histone H2AX at serine 139 (γH2AX) in naïve DU145 cells...
April 7, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28378599/liposomal-microparticle-injection-can-induce-myeloid-derived-suppressor-cells-mdsc-like-cells-in-vivo
#11
Hiroshi Azuma, Yoichiro Yoshida, Hironori Takahashi, Emi Ishibazawa, Hiroya Kobayashi, Hiromi Sakai, Daisuke Takahashi, Mitsuhiro Fujihara
CONTEXT: Myeloid-derived suppressor cells (MDSCs) are a subset of immature myeloid cells that function as immunosuppressive cells in various pathological conditions. Membrane-derived microvesicles are thought to be involved in MDSC induction. Earlier reports have described that injection of considerable amount of liposome into rat can suppress Con A-induced splenic T-cell proliferation. Liposome-internalized cells expressing CD11b/c suppress T-cell proliferation. Nitric oxide (NO) appears to be involved in the suppression...
April 5, 2017: Immunopharmacology and Immunotoxicology
https://www.readbyqxmd.com/read/28376568/mesenchymal-stem-cell-microvesicles-attenuate-acute-lung-injury-in-mice-partly-mediated-by-ang-1-mrna
#12
Xiao-Dan Tang, Lin Shi, Antoine Monsel, Xiang-Yang Li, Hui-Li Zhu, Ying-Gang Zhu, Jie-Ming Qu
Microvesicles derived from human mesenchymal stem cells (MSC MVs) were demonstrated to ameliorate inflammation in lungs. We have found their content of mRNA for keratinocyte growth factor was partly involved in their therapeutic effects. Since MSC MVs also contained a substantial quantity of Angiopoietin-1 mRNA, which plays an essential role in vascular stabilization and resolving inflammation, we hypothesized that Angiopoietin-1 mRNA might similarly account for a part of their therapeutic effects. We down-regulated Angiopoietin-1 mRNA expression in microvesicles, using a lentivirus vector carrying Angiopoietin-1 shRNA to transfect mesenchymal stem cells...
April 4, 2017: Stem Cells
https://www.readbyqxmd.com/read/28375516/host-pathogen-interface-progress-in-understanding-the-pathogenesis-of-infection-due-to-multidrug-resistant-bacteria-in-the-intensive-care-unit
#13
Danielle Ahn, Alice Prince
The diverse responses of critically ill patients to infection with multi-drug resistant (MDR) bacteria are determined by many complex factors. These include the nature of the immune response activated by specific organisms. Properties unique to each organism such as adherence proteins, microvesicle formation, toxin production and the propensity to form biofilms are important factors in pathogenesis. Equally important is the variability in the host immune response, whether due to genetic or iatrogenic factors, including the presence of major comorbidities, treatment with immunomodulatory therapy and disruption of the microbiome...
February 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28373875/roles-and-modalities-of-ectonucleotidases-in-remodeling-the-multiple-myeloma-niche
#14
Antonella Chillemi, Valeria Quarona, Luca Antonioli, Davide Ferrari, Alberto L Horenstein, Fabio Malavasi
Ectoenzymes are cell surface molecules, which represent functional bridges between the environment and the cytoplasm. One set of ectoenzymes-CD39, CD38, CD203a, and CD73-leads to the generation of adenosine (ADO) by metabolizing ATP and NAD(+). While ADO is known to control inflammation and suppress immune responses, other aspects of ADO function are still obscure, mainly due to its short half-life in biological fluids. Human multiple myeloma (MM) grows in the closed system of the bone marrow (BM) niche representing an ideal setting for studying ectoenzymes and their products...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28370348/microvesicles-shuttled-mir-200b-attenuate-experimental-colitis-associated-intestinal-fibrosis-by-inhibiting-the-development-of-emt
#15
Jia Yang, Cheng-Zhi Zhou, Rui Zhu, Heng Fan, Xing-Xing Liu, Xue-Yun Duan, Qing Tang, Zhe-Xing Shou, Dong-Mei Zuo
BACKGROUND: Epithelial-mesenchymal transition (EMT), characterized by the decrease of E-Cad and increase of vimentin and α-SMA, was demonstrated to participate in inflammatory bowel disease (IBD) related fibrosis. MiR-200b plays an anti-fibrosis role in inhibiting EMT by targeting ZEB1 and ZEB2. But the stability of exogenous miR-200b in blood limits its application. Microvesicles (MVs), which can transfer miRNAs among cells and prevent them from degradation, may provide an excellent transport system for the delivery of miR-200b in the treatment of fibrosis...
March 31, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28363591/extracellular-vesicle-characteristics-in-stored-red-blood-cell-concentrates-are-influenced-by-the-method-of-detection
#16
REVIEW
Ruqayyah J Almizraq, Jerard Seghatchian, Jelena L Holovati, Jason P Acker
Extracellular vesicles (EVs), including microvesicles and exosomes, are small phospholipid vesicles (≤1μm in diameter) that are present in blood products, accumulate during storage, and have a potential transfusion-related immunomodulatory role. Knowledge of EVs in stored blood products is limited due to the challenges and difficulties in detecting these heterogeneous submicron-sized vesicles. The aim of this study was to assess the impact of different approaches to characterize EVs in stored RBC products...
March 9, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28363268/microrna-183-5p-increases-with-age-in-bone-derived-extracellular-vesicles-suppresses-bone-marrow-stromal-stem-cell-proliferation-and-induces-stem-cell-senescence
#17
Colleen Davis, Amy Dukes, Michelle Drewry, Inas Helwa, Maribeth Johnson, Carlos M Isales, William D Hill, Yutao Liu, Xingming Shi, Sadanand Fulzele, Mark W Hamrick
Microvesicle- and exosome-mediated transport of microRNAs (miRNAs) represents a novel cellular and molecular pathway for cell-cell communication. Here we tested the hypothesis that these extracellular vesicles (EVs) and their miRNAs might change with age, contributing to age-related stem cell dysfunction. EVs were isolated from the bone marrow interstitial fluid (supernatant) of young (3-4 mo) and aged (24-28 mo) mice to determine whether the size, concentration, and miRNA profile of EVs was altered with age in vivo...
March 31, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28360855/the-p2x7-receptor-interleukin-1-liaison
#18
REVIEW
Anna Lisa Giuliani, Alba C Sarti, Simonetta Falzoni, Francesco Di Virgilio
Interleukin-1β (IL-1β) plays a central role in stimulation of innate immune system and inflammation and in several chronic inflammatory diseases. These include rare hereditary conditions, e.g., auto-inflammatory syndromes, as well as common pathologies, such as type II diabetes, gout and atherosclerosis. A better understanding of IL-1β synthesis and release is particularly relevant for the design of novel anti-inflammatory drugs. One of the molecules mainly involved in IL-1β maturation is the P2X7 receptor (P2X7R), an ATP-gated ion channel that chiefly acts through the recruitment of the NLRP3 inflammasome-caspase-1 complex...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28358188/effective-integration-of-targeted-tumor-imaging-and-therapy-using-functionalized-inp-qds-with-vegfr2-monoclonal-antibody-and-mir-92a-inhibitor
#19
Yi-Zhou Wu, Jie Sun, Yaqin Zhang, Maomao Pu, Gen Zhang, Nongyue He, Xin Zeng
Rapid diagnosis and targeted drug treatment require agents that possess multiple functions. Nanomaterials that facilitate optical imaging and direct drug delivery have shown great promise for effective cancer treatment. In this study, we first modified near-infrared fluorescent indium phosphide quantum dots (InP QDs) with a vascular endothelial growth factor receptor 2 (VEGFR2) monoclonal antibody to afford targeted drug delivery function. Then, a miR-92a inhibitor, an antisense microRNA that enhances the expression of tumor suppressor p63, was attached to the VEGFR2-InP QDs via electrostatic interactions...
April 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28356007/fluorescent-immortalized-human-adipose-derived-stromal-cells-hascs-ts-gfp-for-studying-cell-drug-delivery-mediated-by-microvesicles
#20
Valentina Coccè, Luigi Balducci, Maria Laura Falchetti, Luisa Pascucci, Emilio Ciusani, Anna Teresa Brini, Francesca Sisto, Giovanna Piovani, Giulio Alessandri, Eugenio Parati, Laura Cabeza, Augusto Pessina
BACKGROUND: A new tool for the drug delivery is based on the use of Mesenchymal Stromal Cells (MSCs) loaded in vitro with anti-cancer drugs. Unfortunately, the restricted lifespan of MSCs represents a significant limitation to produce them in high amounts and for long time studies. Immortalized MSCs from adipose tissue (hASC) have been generated as good source of cells with stable features. These cells could improve the development of standardized procedures for both in vitro and preclinical studies...
March 27, 2017: Anti-cancer Agents in Medicinal Chemistry
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