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Nanovesicles

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https://www.readbyqxmd.com/read/28209780/microtubule-associated-protein-4-map4-controls-nanovesicle-dynamics-and-t-cell-activation
#1
Eugenio Bustos-Morán, Noelia Blas-Rus, Noa Martin-Cófreces, Francisco Sánchez-Madrid
The Immune Synapse (IS) is a specialized structure formed at the contact area between T lymphocytes and antigen-presenting cells (APC), essential for the adaptive immune response. Proper T cell activation requires its polarization towards the APC, which is highly dependent on the tubulin cytoskeleton. Microtubule associated protein-4 (MAP4) is a microtubule (MT)-stabilizing protein that controls MTs in physiological processes such as cell division, migration, vesicular transport or primary cilia formation. In this study, we have assessed the role of MAP4 in T cell activation...
February 16, 2017: Journal of Cell Science
https://www.readbyqxmd.com/read/28197068/exosomes-an-unmasked-culprit-in-neurodegenerative-diseases
#2
REVIEW
Federico N Soria, Olatz Pampliega, Mathieu Bourdenx, Wassilios G Meissner, Erwan Bezard, Benjamin Dehay
Exosomes are extracellular nanovesicles (30-100 nm) generated from endosomal membranes and known to be released by all cell lineages of the Central Nervous System (CNS). They constitute important vesicles for the secretion and transport of multilevel information, including signaling, toxic, and regulatory molecules. Initially thought to have a function merely in waste disposal, the involvement of exosomes in neuronal development, maintenance, and regeneration through its paracrine and endocrine signaling functions has drawn particular attention in recent years...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28192250/bifunctional-viscous-nanovesicles-co-loaded-with-resveratrol-and-gallic-acid-for-skin-protection-against-microbial-and-oxidative-injuries
#3
Justina Vitonyte, Maria Letizia Manca, Carla Caddeo, Donatella Valenti, Josè Esteban Peris, Iris Usach, Amparo Nacher, Maria Matos, Gemma Gutiérrez, Germano Orrù, Xavier Fernàndez-Busquets, Anna Maria Fadda, Maria Manconi
Resveratrol and gallic acid were co-loaded in phospholipid vesicles aiming at protecting the skin from external injuries, such as oxidative stress and microbial infections. Liposomes were prepared using biocompatible phospholipids dispersed in water. To improve vesicle stability and applicability, the phospholipids and the phenols were dispersed in water/propylene glycol or water/glycerol, thus obtaining PEVs and glycerosomes, respectively. The vesicles were characterized by size, morphology, physical stability, and their therapeutic efficacy was investigated in vitro...
February 10, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28191576/glutathione-responsive-paclitaxel-dimer-nanovesicles-with-high-drug-content
#4
Qing Pei, Xiuli Hu, Junli Zhou, Shi Liu, Zhigang Xie
Paclitaxel dimer-based nanovesicles, with an ultrahigh drug content, have been prepared through a nanoprecipitation method. The as-formed nanovesicles exhibit improved paclitaxel solubility, prominent colloid stability, GSH-triggered disassembly, effective cellular uptake and comparable cytotoxicity to Taxol.
February 13, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28166442/exosomes-in-cancer-theranostic-diamonds-in-the-rough
#5
Marine Cordonnier, Gaëtan Chanteloup, Nicolas Isambert, Renaud Seigneuric, Pierre Fumoleau, Carmen Garrido, Jessica Gobbo
During the last 10 years, exosomes, which are small vesicles of 50-200 nm diameter of endosomal origin, have aroused a great interest in the scientific and clinical community for their roles in intercellular communication in almost all physiological and pathological processes. Most cells can potentially release these nanovesicles that share with the parent cell a similar lipid bilayer with transmembrane proteins and a panel of enclosed soluble proteins such as heat shock proteins and genetic material, thus acting as potential nanoshuttles of biomarkers...
February 6, 2017: Cell Adhesion & Migration
https://www.readbyqxmd.com/read/28166394/exosome-separation-using-microfluidic-systems-size-based-immunoaffinity-based-and-dynamic-methodologies
#6
REVIEW
Fang Yang, Xiangzhi Liao, Yuan Tian, Guiying Li
Exosomes, nanovesicles secreted by most types of cells, exist in virtually all bodily fluids. Their rich nucleic acid and protein content make them potentially valuable biomarkers for noninvasive molecular diagnostics. They also show promise, after further development, to serve as a drug delivery system. Unfortunately, existing exosome separation technologies, such as ultracentrifugation and methods incorporating magnetic beads, are time-consuming, laborious and separate only exosomes of low purity. Thus, a more effective separation method is highly desirable...
February 6, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28152040/distinct-repertoires-of-micrornas-present-in-mouse-astrocytes-compared-to-astrocyte-secreted-exosomes
#7
Ana Jovičić, Aaron D Gitler
BACKGROUND: Astrocytes are the most abundant cell type in the central nervous system (CNS) and secrete various factors that regulate neuron development, function and connectivity. microRNAs (miRNAs) are small regulatory RNAs involved in posttranslational gene regulation. Recent findings showed that miRNAs are exchanged between cells via nanovesicles called exosomes. In this study, we sought to define which miRNAs are contained within exosomes secreted by astrocytes. We also explored whether astroglial miRNA secretion via exosomes is perturbed in a mouse model of amyotrophic lateral sclerosis (ALS), a neurodegenerative disease where astrocytes play a crucial role in driving disease progression...
2017: PloS One
https://www.readbyqxmd.com/read/28144138/in-vitro-determination-of-the-efficacy-of-scorpion-venoms-as-anti-cancer-agents-against-colorectal-cancer-cells-a-nano-liposomal-delivery-approach
#8
Abdulrahman K Al-Asmari, Zabih Ullah, Ali Al Balowi, Mozaffarul Islam
The use of liposomes in biological and medicinal sciences is a relatively new approach. The liposomal strategy greatly depends on the technological advancement in the formation of vesicles of various sizes and properties. In the current study, we encapsulated the venoms obtained from medically important scorpions such as Androctonus bicolor (AB), Androctonus crassicauda (AC), and Leiurus quinquestriatus (LQ). To begin with, our first and foremost aim was to prepare biocompatible and biodegradable nanovesicles...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28140504/anaerobe-inspired-anticancer-nanovesicles
#9
Chenggen Qian, Peijian Feng, Jicheng Yu, Yulei Chen, Quanyin Hu, Wujin Sun, Xuanzhong Xiao, Xiuli Hu, Adriano Bellotti, Qun-Dong Shen, Zhen Gu
Anaerobic bacteria, such as Clostridium and Salmonella, can selectively invade and colonize in tumor hypoxic regions (THRs) and deliver therapeutic products to destroy cancer cells. Herein, we present an anaerobe nanovesicle mimic that can not only be activated in THRs but also induce hypoxia in tumors by themselves. Moreover, inspired by the oxygen metabolism of anaerobes, we construct a light-induced hypoxia-responsive modality to promote dissociation of vehicles and activation of bioreductive prodrugs simultaneously...
January 31, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28132116/exosomes-derived-from-irradiated-esophageal-carcinoma-infiltrating-t-cells-promote-metastasis-by-inducing-the-epithelial-mesenchymal-transition-in-esophageal-cancer-cells
#10
Hua Min, Xiangdong Sun, Xi Yang, Hongcheng Zhu, Jia Liu, Yuandong Wang, Guangzong Chen, Xinchen Sun
Exosomes are nanovesicles derived from tumor and normal cells that are detectable in human biological fluids, such as plasma, and cell culture supernatants. The function of exosome secretion from "normal" cells is unclear. Although numerous studies have investigated exosomes derived from hematopoietic cells, little is known regarding exosomes fromT cells, even though these cells play significant roles in innate and acquired immunity. A CCK-8 assay was used to examine the ability of exosomes to inhibit TE13 cell proliferation...
January 28, 2017: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/28126680/testing-of-bioactive-nanovesicles-on-hepatotoxicity-of-atypical-antipsychotics-via-digital-holography
#11
Fatma Ozturk Kirbay, Caner Geyik, Emine Guler, Ozan Yesiltepe, Zinar Pinar Gumus, Dilek Odaci Demirkol, Hakan Coskunol, Suna Timur
Atypical antipsychotic drugs induce hepatic toxicity. Thus, it is of importance to eliminate the side effects of these drugs. Herein we describe the preparation of nanoemulsions with a dietary supplement; wheat germ oil (WGO), to ameliorate the liver damage induced by clozapine and olanzapine. THLE-2 cell line was used as a model to investigate the effects of these nanoemulsions on cell viability as well as antioxidative efficiency after antipsychotic insult. In this context, a conventional cell culture method; MTT was used along with a novel cellular imaging technique called digital holography (DH) to evaluate cell viability...
January 20, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28110069/peptide-and-nucleic-acid-directed-self-assembly-of-cationic-nanovehicles-through-giant-unilamellar-vesicle-modification-targetable-nanocomplexes-for-in-vivo-nucleic-acid-delivery
#12
A D Tagalakis, R Maeshima, C Yu-Wai-Man, J Meng, F Syed, L-P Wu, A M Aldossary, D McCarthy, S M Moghimi, S L Hart
: One of the greatest challenges for the development of genetic therapies is the efficient targeted delivery of therapeutic nucleic acids. Towards this goal, we have introduced a new engineering initiative in self-assembly of biologically safe and stable nanovesicle complexes (∼90-140 nm) derived from giant unilamellar vesicle (GUV) precursors and comprising plasmid DNA or siRNA and targeting peptide ligands. The biological performance of the engineered nanovesicle complexes were studied both in vitro and in vivo and compared with cationic liposome-based lipopolyplexes...
January 18, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28104913/exosome-derived-micrornas-in-cancer-metabolism-possible-implications-in-cancer-diagnostics-and-therapy
#13
REVIEW
Marco Tomasetti, Wan Lee, Lory Santarelli, Jiri Neuzil
Malignant progression is greatly affected by dynamic cross-talk between stromal and cancer cells. Exosomes are secreted nanovesicles that have key roles in cell-cell communication by transferring nucleic acids and proteins to target cells and tissues. Recently, MicroRNAs (miRs) and their delivery in exosomes have been implicated in physiological and pathological processes. Tumor-delivered miRs, interacting with stromal cells in the tumor microenvironment, modulate tumor progression, angiogenesis, metastasis and immune escape...
January 20, 2017: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/28103528/topical-vaccination-with-super-stable-ready-to-use-nanovesicles
#14
Ayelen Tatiana Caimi, Federico Parra, Marcelo Alexandre de Farias, Rodrigo Villares Portugal, Ana Paula Perez, Eder Lilia Romero, Maria Jose Morilla
Ultradeformable archaeosomes (UDA) are nanovesicles made of total polar archaeolipids (TPA) from the archaea Halorubrum tebenquichense, soybean phosphatidylcholine and sodium cholate (3:3:1w/w). Fresh dispersions of UDA including different type of antigens are acknowledged as efficient topical vaccination agents. UDA dispersions however, if manufactured for pharmaceutical use, have to maintain colloidal stability upon liposomicidal processes such as sterilization and lyophilization (SLRUDA), needed to extend shelf life during storage...
December 26, 2016: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28098821/tumor-microenvironment-modulation-via-gold-nanoparticles-targeting-malicious-exosomes-implications-for-cancer-diagnostics-and-therapy
#15
REVIEW
Catarina Roma-Rodrigues, Luís R Raposo, Rita Cabral, Fabiana Paradinha, Pedro V Baptista, Alexandra R Fernandes
Exosomes are nanovesicles formed in the endosomal pathway with an important role in paracrine and autocrine cell communication. Exosomes secreted by cancer cells, malicious exosomes, have important roles in tumor microenvironment maturation and cancer progression. The knowledge of the role of exosomes in tumorigenesis prompted a new era in cancer diagnostics and therapy, taking advantage of the use of circulating exosomes as tumor biomarkers due to their stability in body fluids and targeting malignant exosomes' release and/or uptake to inhibit or delay tumor development...
January 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28088372/nanoformulation-of-dual-bexarotene-tailed-phospholipid-conjugate-with-high-drug-loading
#16
Ruiyu He, Yawei Du, Longbing Ling, Muhammad Ismail, Yongpeng Hou, Chen Yao, Xinsong Li
Bexarotene (Bex), a synthetic retinoid X receptor-selective activator, has been proved to be an efficacious chemotherapeutic agent. But, its clinical application is limited due to the poor solubility. In this report, dual bexarotene-tailed phospholipid (DBTP) conjugate based nanovesicles were prepared in order to develop new nanoformulation. DBTP conjugate was first synthesized by conjugating two Bex molecules with glycerophosphorylcholine (GPC) through facial esterification. The amphiphilic DBTP nanovesicles were prepared without any additive by reverse-phase evaporation method...
January 12, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28078954/nanovesicle-delivery-to-the-liver-via-retinol-binding-protein-and-platelet-derived-growth-factor-receptors-how-targeting-ligands-affect-biodistribution
#17
Ching-Yun Hsu, Chun-Han Chen, Ibrahim A Aljuffali, You-Shan Dai, Jia-You Fang
AIM: Nanovesicles (NVs) conjugating ligands can deliver to the specific nidus. We designed a nanosystem targeting the injectable niosomes to liver for examining biodistribution. METHODOLOGY: Vitamin A and antiplatelet-derived growth factor receptor antibody were employed as the ligands to be taken by hepatic stellate cells. The biodistribution in rats was visualized by bioimaging. RESULTS: A significant liver accumulation was detected for antibody-embedded NVs at 2 h after dosing...
January 12, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28069551/first-in-vivo-mri-study-on-theranostic-dendrimersomes
#18
Miriam Filippi, Valeria Catanzaro, Deyssy Patrucco, Mauro Botta, Lorenzo Tei, Enzo Terreno
Amphiphilic Janus-dendrimers are able to self-assemble into nanosized vesicles named dendrimersomes. We recently synthesized the 3,5-C12-EG-(OH)4 dendrimer that generates dendrimersomes with very promising safety and stability profiles, that can be loaded with different contrast agents for in vivo imaging. In this contribution, nanovesicles were loaded with both the Magnetic Resonance Imaging (MRI) reporter GdDOTAGA(C18)2 and the glucocorticoid drug Prednisolone Phosphate (PLP), in order to test their effective potential as theranostic nanocarriers on murine melanoma tumour models...
January 7, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28064505/cisplatin-stitched-polysaccharide-vesicles-for-synergistic-cancer-therapy-of-triple-antagonistic-drugs
#19
Nilesh Umakant Deshpande, Manickam Jayakannan
New cisplatin-stitched polysaccharide vesicular nanocarrier is developed for combination therapy of three clinical important antagonistic drugs together to accomplish synergistic cancer therapy in breast cancer treatment. Carboxylic functionalized dextran was tailor-made for the chemical conjugation of cisplatin, and a renewable hydrophobic unit was anchored in the backbone to interdigitize the chains to self-assemble as cisplatin-stitched polysaccharide nanovesicles. Water-soluble DNA-intercalating drug doxorubicin·HCl (DOX) and water insoluble topoisomerase type I inhibitor drug camptothecin (CPT) were encapsulated in these vesicles to produce dual or triple drug-loaded vesicular nanocarrier...
January 9, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28064008/functional-response-of-novel-bioprotective-poloxamer-structured-vesicles-on-inflamed-skin
#20
Carla Caddeo, Maria Letizia Manca, Maria Matos, Gemma Gutierrez, Octavio Díez-Sales, José Esteban Peris, Iris Usach, Xavier Fernàndez-Busquets, Anna Maria Fadda, Maria Manconi
Resveratrol and gallic acid, a lipophilic and a hydrophilic phenol, were co-loaded in innovative, biocompatible nanovesicles conceived for ensuring the protection of the skin from oxidative- and inflammatory-related affections. The basic vesicles, liposomes and glycerosomes, were produced by a simple, one-step method involving the dispersion of phospholipid and phenols in water or water/glycerol blend, respectively. Liposomes and glycerosomes were modified by the addition of poloxamer, a stabilizer and viscosity enhancer, thus obtaining viscous or semisolid dispersions of structured vesicles...
January 4, 2017: Nanomedicine: Nanotechnology, Biology, and Medicine
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