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Nanovesicles

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https://www.readbyqxmd.com/read/28631206/diclofenac-loaded-lipid-nanovesicles-prepared-by-double-solvent-displacement-for-skin-drug-delivery
#1
M Sala, F Locher, M Bonvallet, G Agusti, A Elaissari, H Fessi
PURPOSE: Herein, we detail a promising strategy of nanovesicle preparation based on control of phospholipid self-assembly: the Double Solvent Displacement. A systematic study was conducted and diclofenac as drug model encapsulated. In vitro skin studies were carried out to identify better formulation for dermal/transdermal delivery. METHODS: This method consists in two solvent displacements. The first one, made in a free water environment, has allowed triggering a phospholipid pre-organization...
June 19, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28627754/labeling-and-magnetic-resonance-imaging-of-exosomes-isolated-from-adipose-stem-cells
#2
Alice Busato, Roberta Bonafede, Pietro Bontempi, Ilaria Scambi, Lorenzo Schiaffino, Donatella Benati, Manuela Malatesta, Andrea Sbarbati, Pasquina Marzola, Raffaella Mariotti
Adipose stem cells (ASC) represent a promising therapeutic approach for neurodegenerative diseases. Most biological effects of ASC are probably mediated by extracellular vesicles, such as exosomes, which influence the surrounding cells. Current development of exosome therapies requires efficient and noninvasive methods to localize, monitor, and track the exosomes. Among imaging methods used for this purpose, magnetic resonance imaging (MRI) has advantages: high spatial resolution, rapid in vivo acquisition, and radiation-free operation...
June 19, 2017: Current Protocols in Cell Biology
https://www.readbyqxmd.com/read/28580875/matrix-bound-nanovesicles-recapitulate-extracellular-matrix-effects-on-macrophage-phenotype
#3
Luai Huleihel, Joseph Bartolacci, Jenna Lynn Dziki, Tatiana Vorobyov, Brooke Arnold, Michelle Scarritt, Catalina Pineda Molina, Samuel LoPresti, Bryan Brown, Stephen F Badylak
The early macrophage response to biomaterials has been shown to be a critical and predictive determinant of downstream outcomes. When properly prepared, bioscaffolds derived from mammalian extracellular matrix (ECM) have been shown to promote a transition in macrophage behavior from a pro-inflammatory to a regulatory/anti-inflammatory phenotype, which in turn has been associated with constructive and functional tissue repair. The mechanism by which ECM bioscaffolds promote this phenotypic transition, however, is poorly understood...
June 4, 2017: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/28559215/physicochemical-characterization-of-ph-responsive-and-fusogenic-self-assembled-non-phospholipid-vesicles-for-a-potential-multiple-targeting-therapy
#4
Martina Di Francesco, Christian Celia, Rosita Primavera, Nicola D'Avanzo, Marcello Locatelli, Massimo Fresta, Felisa Cilurzo, Cinzia Anna Ventura, Donatella Paolino, Luisa Di Marzio
In order to obtain nanocarriers suitable for the delivery of drugs in the treatment of cancer, pH-responsive nanovesicles capable of facilitating fusion (fusogenic nanovesicles) were synthesized and then their physicochemical characteristics were modified. These nanovesicles were made by combining polysorbates having different physicochemical features with the aim of realizing multiple-targeting nanoformulations suitable for in vitro treatment of cancer cells. Tween21 and Tween80 were self-assembled at different molar concentrations resulting in pH-responsive fusogenic nanovesicles with an average size of less than 150nm, and a narrow size distribution (polydispersity index) value of less than 0...
May 27, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28558948/ultrasonic-assisted-incorporation-of-nano-encapsulated-omega-3-fatty-acids-to-enhance-the-fatty-acid-profile-of-pork-meat
#5
K Shikha Ojha, Camila A Perussello, Carlos Álvarez García, Joseph P Kerry, Daniel Pando, Brijesh K Tiwari
In this study, ultrasound was employed to enhance the diffusion of microencapsulated fatty acids into pork meat. Nanovesicles of fish oil composed of 42% EPA (eicosapentanoic acid) and 16% DHA (docosahexanoic acid) were prepared using two different commercial Pronanosome preparations (Lipo-N and Lipo-CAT; which yield cationic and non-cationic nanovesicles, respectively). The thin film hydration (TFH) methodology was employed for encapsulation. Pork meat (Musculus semitendinosus) was submerged in the nanovesicles suspension and subjected to ultrasound (US) treatment at 25kHz for either 30 or 60min...
May 5, 2017: Meat Science
https://www.readbyqxmd.com/read/28551229/biopolymer-coated-nanoliposomes-as-carriers-of-rainbow-trout-skin-derived-antioxidant-peptides
#6
Leila Ramezanzade, Seyed Fakhreddin Hosseini, Maryam Nikkhah
In this study, an antioxidant peptide fraction with a molecular mass<30kDa (PF30) isolated from rainbow trout (Oncorhynchus mykiss) skin gelatin hydrolysates was encapsulated in chitosan-coated nanoliposomes. The mean particle size of liposomal nanovesicles containing PF30 was found to be in the range 163.4-234nm with a low polydispersity index (PDI<0.5); furthermore, the ζ-potential changed from +3.9mV in uncoated liposomes to +45.5mV in biopolymer-coated liposomes. FTIR spectra showed electrostatic interactions as well as hydrogen bonding between phospholipid head groups and amine groups of chitosan...
November 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28546080/exosomes-in-hiv-infection-a-review-and-critical-look
#7
REVIEW
Joel Henrique Ellwanger, Tiago Degani Veit, José Artur Bogo Chies
Exosomes are nanovesicles released into the extracellular medium by different cell types. These vesicles carry a variety of protein and RNA cargos, and have a central role in cellular signaling and regulation. A PubMed search using the term "exosomes" finds 67 articles published in 2006. Ten years later, the same search returns approximately 1200 results for 2016 alone. The growing interest in exosomes within the scientific community reflects the different roles exerted by extracellular vesicles in biological systems and diseases...
May 22, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28532009/exploring-recent-developments-to-improve-antioxidant-anti-inflammatory-and-antimicrobial-efficacy-of-curcumin-a-review-of-new-trends-and-future-perspectives
#8
REVIEW
Zahid Hussain, Hnin Ei Thu, Muhammad Wahab Amjad, Fahad Hussain, Tarek A Ahmed, Shahzeb Khan
Curcumin derivatives have been well-documented due to their natural antioxidant, antimicrobial and anti-inflammatory activities. Curcuminoids have also gained widespread recognition due to their wide range of other activities which include anti-infective, anti-mutagenic, anticancer, anti-coagulant, antiarthrititc, and wound healing potential. Despite of having a wide range of activities, the inherent physicochemical characteristics (poor water solubility, low bioavailability, chemical instability, photodegradation, rapid metabolism and short half-life) of curcumin derivatives limit their pharmaceutical significance...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28522423/sertaconazole-nitrate-loaded-nanovesicular-systems-for-targeting-skin-fungal-infection-in-vitro-ex-vivo-and-in-vivo-evaluation
#9
Menna M Abdellatif, Islam A Khalil, Mahmoud A F Khalil
The aim of this study was to develop different vesicular systems for sertaconazole nitrate and evaluate the ability of targeting deep skin layers to treat dermal fungal infection. Therefore, different phospholipid based nanovesicles, namely liposomes, glycerosomes, transferosmes and ethosomes were prepared and in-vitro evaluated for morphology, entrapment efficiency, vesicle size and zeta potential value, followed by ex-vivo evaluation through skin penetration and permeation. The selected vesicular formula was incorporated into gel base system and assessed by ex-vivo permeation visualization study using confocal laser scanning microscopy (CLSM)...
May 15, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28520506/urinary-nanovesicles-captured-by-lectins-or-antibodies-demonstrate-variations-in-size-and-surface-glycosylation-profile
#10
Jared Q Gerlach, Ciaran M Maguire, Anja Krüger, Lokesh Joshi, Adriele Prina-Mello, Matthew D Griffin
AIM: The use of carbohydrate-binding proteins (lectins) to isolate urinary extracellular vesicles (uEVs) was investigated and the captured subpopulations were characterized. METHODS: Pooled uEVs from multiple healthy donors were exposed to lectin-conjugated or antibody-conjugated beads. Recovered uEVs were evaluated by protein estimation, transmission electron microscopy, nanoparticle tracking analysis and lectin microarray profiling. RESULTS: uEVs isolated by lectin- and antibody-based affinity capture exhibited distinct variations in size and surface content...
May 18, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28487629/exosomes-as-carriers-of-alzheimer-s-amyloid-%C3%A3
#11
REVIEW
Kohei Yuyama, Yasuyuki Igarashi
The intracerebral level of the aggregation-prone peptide, amyloid-ß (Aß), is constantly maintained by multiple clearance mechanisms, including several degradation enzymes, and brain efflux. Disruption of the clearance machinery and the resultant Aß accumulation gives rise to neurotoxic assemblies, leading to the pathogenesis of Alzheimer's disease (AD). In addition to the classic mechanisms of Aß clearance, the protein may be processed by secreted vesicles, although this possibility has not been extensively investigated...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28480080/deformable-nanovesicles-synthesized-through-an-adaptable-microfluidic-platform-for-enhanced-localized-transdermal-drug-delivery
#12
Naren Subbiah, Jesus Campagna, Patricia Spilman, Mohammad Parvez Alam, Shivani Sharma, Akishige Hokugo, Ichiro Nishimura, Varghese John
Phospholipid-based deformable nanovesicles (DNVs) that have flexibility in shape offer an adaptable and facile method to encapsulate diverse classes of therapeutics and facilitate localized transdermal delivery while minimizing systemic exposure. Here we report the use of a microfluidic reactor for the synthesis of DNVs and show that alteration of input parameters such as flow speeds as well as molar and flow rate ratios increases entrapment efficiency of drugs and allows fine-tuning of DNV size, elasticity, and surface charge...
2017: Journal of Drug Delivery
https://www.readbyqxmd.com/read/28473829/gut-microbiota-as-a-trigger-of-accelerated-directional-adaptive-evolution-acquisition-of-herbivory-in-the-context-of-extracellular-vesicles-micrornas-and-inter-kingdom-crosstalk
#13
Marco Romano
According to a traditional view, the specific diet in vertebrates is one of the key factors structuring the composition of the gut microbiota. In this interpretation, the microbiota assumes a subordinate position, where the larger host shapes, through evolution and its fitness, the taxonomical composition of the hosted microbiota. The present contribution shows how the evolution of herbivory, framed within the new concept of holobiont, the possibility of inter-kingdom crosstalk and its epigenetic effects, could pave the way to a completely reversed interpretation: instead of being passively shaped, the microbiota can mold and shape the general host body structure to increase its fitness...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28458537/pseudotyping-exosomes-for-enhanced-protein-delivery-in-mammalian-cells
#14
Conary Meyer, Joseph Losacco, Zachary Stickney, Lingxuan Li, Gerard Marriott, Biao Lu
Exosomes are cell-derived nanovesicles that hold promise as living vehicles for intracellular delivery of therapeutics to mammalian cells. This potential, however, is undermined by the lack of effective methods to load exosomes with therapeutic proteins and to facilitate their uptake by target cells. Here, we demonstrate how a vesicular stomatitis virus glycoprotein (VSVG) can both load protein cargo onto exosomes and increase their delivery ability via a pseudotyping mechanism. By fusing a set of fluorescent and luminescent reporters with VSVG, we show the successful targeting and incorporation of VSVG fusions into exosomes by gene transfection and fluorescence tracking...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28456604/herpesviruses-hijack-host-exosomes-for-viral-pathogenesis
#15
REVIEW
Sara Sadeghipour, Rommel A Mathias
Herpesviruses are remarkable pathogens possessing elaborate mechanisms to seize various host cellular components for immune evasion, replication, and virion egress. As viruses are dependent upon their hosts, investigating this intricate interplay has revealed that the exosome pathway is utilised by alpha (Herpes Simplex Virus 1), beta (Human Cytomegalovirus, and Human Herpesvirus 6) and gamma (Epstein-Barr Virus, and Kaposi Sarcoma-associated Herpesvirus) herpesviruses. Virions and exosomes share similar properties and functions...
April 26, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28450057/environmental-neurotoxicant-manganese-regulates-exosome-mediated-extracellular-mirnas-in-cell-culture-model-of-parkinson-s-disease-relevance-to-%C3%AE-synuclein-misfolding-in-metal-neurotoxicity
#16
Dilshan S Harischandra, Shivani Ghaisas, Dharmin Rokad, Mostafa Zamanian, Huajun Jin, Vellareddy Anantharam, Michael Kimber, Arthi Kanthasamy, Anumantha G Kanthasamy
Many chronic neurodegenerative disorders share a common pathogenic mechanism involving the aggregation and deposition of misfolded proteins. Recently, it was shown that these aggregated proteins could be transferred from one cell to another via extracellular nanovesicles called exosomes. Initially thought to be a means of cellular waste removal, exosomes have since been discovered to actively participate in cell-to-cell communication. Importantly, various inflammatory and signaling molecules, as well as small RNAs are selectively packaged in these vesicles...
April 24, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28435439/nanobiotechnology-cell-membrane-based-delivery-systems
#17
Pengfei Zhang, Gang Liu, Xiaoyuan Chen
The increasingly rapid pace of research in the field of bioinspired drug delivery systems is revealing the promise of cell membrane-based nanovesicles for biomedical applications. Those cell membrane-based nanoparticles combine the natural functionalities of cell plasma membranes and the bioengineering flexibility of synthetic nanomaterials, and such versatility provides a means of designing exciting new drug formulations for personalized treatment in future nanomedicine.
April 2017: Nano Today
https://www.readbyqxmd.com/read/28435256/doxorubicin-loaded-cell-derived-nanovesicles-an-alternative-targeted-approach-for-anti-tumor-therapy
#18
Wei Jiang Goh, Choon Keong Lee, Shui Zou, Esther Cy Woon, Bertrand Czarny, Giorgia Pastorin
Cell-derived nanovesicles (CDNs) are an emerging class of biological drug delivery systems (DDS) that retain the characteristics of the cells they were derived from, without the need for further surface functionalization. CDNs are also biocompatible, being derived from natural sources and also take advantage of the enhanced permeability and retention effect due to their nanodimensions. Furthermore, CDNs derived from monocytes were shown to have an in vivo targeting effect, accumulating at the tumor site in a previous study conducted in a mouse tumor model...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28415645/peritoneal-carcinomatosis-limits-of-diagnosis-and-the-case-for-liquid-biopsy
#19
REVIEW
James R W McMullen, Matthew Selleck, Nathan R Wall, Maheswari Senthil
Peritoneal Carcinomatosis (PC) is a late stage manifestation of several gastrointestinal malignancies including appendiceal, colorectal, and gastric cancer. In PC, tumors metastasize to and deposit on the peritoneal surface and often leave patients with only palliative treatment options. For colorectal PC, median survival is approximately five months, and palliative systemic therapy is able to extend this to approximately 12 months. However, cytoreductive surgery with hyperthermic intraperitoneal chemotherapy (CRS/HIPEC) with a curative intent is possible in some patients with limited tumor burden...
March 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28405503/genotoxic-stress-modulates-the-release-of-exosomes-from-multiple-myeloma-cells-capable-of-activating-nk-cell-cytokine-production-role-of-hsp70-tlr2-nf-kb-axis
#20
Elisabetta Vulpis, Francesca Cecere, Rosa Molfetta, Alessandra Soriani, Cinzia Fionda, Giovanna Peruzzi, Giulio Caracciolo, Sara Palchetti, Laura Masuelli, Lucilla Simonelli, Ugo D'Oro, Maria Pia Abruzzese, Maria Teresa Petrucci, Maria Rosaria Ricciardi, Rossella Paolini, Marco Cippitelli, Angela Santoni, Alessandra Zingoni
Exosomes are a class of nanovesicles formed and released through the late endosomal compartment and represent an important mode of intercellular communication. The ability of anticancer chemotherapy to enhance the immunogenic potential of malignant cells mainly relies on the establishment of the immunogenic cell death (ICD) and the release of damage-associated molecular patterns (DAMPs). Here, we investigated whether genotoxic stress could promote the release of exosomes from multiple myeloma (MM) cells and studied the immunomodulatory properties they exert on NK cells, a major component of the antitumor immune response playing a key role in the immunosurveillance of MM...
2017: Oncoimmunology
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