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https://www.readbyqxmd.com/read/28094297/high-throughput-quantitation-of-inorganic-nanoparticle-biodistribution-at-the-single-cell-level-using-mass-cytometry
#1
Yu-Sang Sabrina Yang, Prabhani U Atukorale, Kelly D Moynihan, Ahmet Bekdemir, Kavya Rakhra, Li Tang, Francesco Stellacci, Darrell J Irvine
Inorganic nanoparticles (NPs) are studied as drug carriers, radiosensitizers and imaging agents, and characterizing nanoparticle biodistribution is essential for evaluating their efficacy and safety. Tracking NPs at the single-cell level with current technologies is complicated by the lack of reliable methods to stably label particles over extended durations in vivo. Here we demonstrate that mass cytometry by time-of-flight provides a label-free approach for inorganic nanoparticle quantitation in cells. Furthermore, mass cytometry can enumerate AuNPs with a lower detection limit of ∼10 AuNPs (3 nm core size) in a single cell with tandem multiparameter cellular phenotyping...
January 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28088881/an-industry-update-the-latest-developments-in-therapeutic-delivery
#2
Iain Simpson
This Industry Update covers the period from 1 October through to 31 October 2016, and is based on information sourced from company press releases, scientific literature, patents and various news websites. The month saw several news items covering drug-delivery devices, including a new sensor to monitor and support the use of inhalers; launch in the UK of a new autoinjector for Cimzia(®), UCB's rheumatoid arthritis drug; and approval of Roche's Lucentis(®) in a prefilled syringe. Research was also published to show the value of continuous blood pressure monitoring in dementia management...
February 2017: Therapeutic Delivery
https://www.readbyqxmd.com/read/28078770/synthetic-plant-virology-for-nanobiotechnology-and-nanomedicine
#3
REVIEW
John F C Steele, Hadrien Peyret, Keith Saunders, Roger Castells-Graells, Johanna Marsian, Yulia Meshcheriakova, George P Lomonossoff
Nanotechnology is a rapidly expanding field seeking to utilize nano-scale structures for a wide range of applications. Biologically derived nanostructures, such as viruses and virus-like particles (VLPs), provide excellent platforms for functionalization due to their physical and chemical properties. Plant viruses, and VLPs derived from them, have been used extensively in biotechnology. They have been characterized in detail over several decades and have desirable properties including high yields, robustness, and ease of purification...
January 11, 2017: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
https://www.readbyqxmd.com/read/28077440/monophosphoryl-lipid-a-enhances-efficacy-of-a-francisella-tularensis-lvs-catanionic-nanoparticle-subunit-vaccine-against-f-tularensis-schu-s4-challenge-by-augmenting-both-humoral-and-cellular-immunity
#4
Katharina Richard, Barbara J Mann, Aiping Qin, Eileen M Barry, Robert K Ernst, Stefanie N Vogel
Francisella tularensis, a bacterial biothreat agent, has no approved vaccine in the USA. Previously, we showed that incorporating lysates from partially attenuated F. tularensis LVS or fully virulent F. tularensis Schu S4 strains into catanionic surfactant vesicle (V) nanoparticles (LVS-V and Schu S4-V, respectively) protected fully against F. tularensis LVS intraperitoneal (i.p.) challenge in mice. However, we achieved only partial protection against F. tularensis Schu S4 intranasal (i.n.) challenge, even when employing heterologous prime/boost immunization strategies...
January 11, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28075069/ebola-vaccination-using-a-dna-vaccine-coated-on-plga-pll-%C3%AE-pga-nanoparticles-administered-using-a-microneedle-patch
#5
Hung-Wei Yang, Ling Ye, Xin Dong Guo, Chinglai Yang, Richard W Compans, Mark R Prausnitz
Ebola DNA vaccine is incorporated into PLGA-PLL/γPGA nanoparticles and administered to skin using a microneedle (MN) patch. The nanoparticle delivery system increases vaccine thermostability and immunogenicity compared to free vaccine. Vaccination by MN patch produces stronger immune responses than intramuscular administration.
January 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28070572/electrostatic-layer-by-layer-construction-of-fibrous-tmv-biofilms
#6
Brylee David B Tiu, Daniel L Kernan, Sicily B Tiu, Amy M Wen, Yi Zheng, Jonathan K Pokorski, Rigoberto C Advincula, Nicole F Steinmetz
As nature's choice in designing complex architectures, the bottom-up assembly of nanoscale building blocks offers unique solutions in achieving more complex and smaller morphologies with wide-ranging applications in medicine, energy, and materials science as compared to top-down manufacturing. In this work, we employ charged tobacco mosaic virus (TMV-wt and TMV-lys) nanoparticles in constructing multilayered fibrous networks via electrostatic layer-by-layer (LbL) deposition. In neutral aqueous media, TMV-wt assumes an anionic surface charge...
January 10, 2017: Nanoscale
https://www.readbyqxmd.com/read/28069499/precise-manipulation-of-biophysical-particle-parameters-enables-control-of-proinflammatory-cytokine-production-in-presence-of-tlr-3-and-4-ligands
#7
Yoshinori Kakizawa, Jung Seok Lee, Brendan Bell, Tarek M Fahmy
: The biophysical parameters governing nanoparticle (NP)-cell interactions significantly affect biological responses, particularly in the application of NP-based immunotherapeutics. Modulation of the surface biophysical character of NPs can be achieved via introduction of amino acids, which offer the ability to fine tune a range of biophysical parameters of interest. We employed this approach using monodisperse silica NPs coated with numerous poly(amino acid)s (PAAs). The NPs were incubated with dendritic cells (DCs) in conjunction with TLR ligands and production of IL-1β from DCs and IFNγ from T cells primed by these DCs were measured...
January 6, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28063980/plant-viral-nanoparticles-based-her2-vaccine-immune-response-influenced-by-differential-transport-localization-and-cellular-interactions-of-particulate-carriers
#8
Sourabh Shukla, Jay T Myers, Sarah E Woods, Xingjian Gong, Anna E Czapar, Ulrich Commandeur, Alex Y Huang, Alan D Levine, Nicole F Steinmetz
Cancer vaccines are designed to elicit an endogenous adaptive immune response that can successfully recognize and eliminate residual or recurring tumors. Such approaches can potentially overcome shortcomings of passive immunotherapies by generating long-lived therapeutic effects and immune memory while limiting systemic toxicities. A critical determinant of vaccine efficacy is efficient transport and delivery of tumor-associated antigens to professional antigen presenting cells (APCs). Plant viral nanoparticles (VNPs) with natural tropism for APCs and a high payload carrying capacity may be particularly effective vaccine carriers...
December 27, 2016: Biomaterials
https://www.readbyqxmd.com/read/28061848/multi-antigen-avian-influenza-a-h7n9-virus-like-particles-particulate-characterizations-and-immunogenicity-evaluation-in-murine-and-avian-models
#9
Che-Ming Jack Hu, Chu-Yang Chien, Ming-Tsan Liu, Zih-Syun Fang, Sui-Yuan Chang, Rong-Huay Juang, Shih-Chung Chang, Hui-Wen Chen
BACKGROUND: Human infection with avian influenza A virus (H7N9) was first reported in China in March 2013. Since then, hundreds of cases have been confirmed showing severe symptoms with a high mortality rate. The virus was transmitted from avian species to humans and has spread to many neighboring areas, raising serious concerns over its pandemic potential. Towards containing the disease, the goal of this study is to prepare a virus-like particle (VLP) that consists of hemagglutinin (HA), neuraminidase (NA) and matrix protein 1 (M1) derived from the human isolate A/Taiwan/S02076/2013(H7N9) for potential vaccine development...
January 7, 2017: BMC Biotechnology
https://www.readbyqxmd.com/read/28061386/characterization-of-the-disassembly-and-reassembly-of-the-hbv-glycoprotein-surface-antigen-a-pliable-nanoparticle-vaccine-platform
#10
John R Gallagher, Udana Torian, Dustin M McCraw, Audray K Harris
While nanoparticle vaccine technology is gaining interest due to the success of vaccines like those for the human papillomavirus that is based on viral capsid nanoparticles, little information is available on the disassembly and reassembly of viral surface glycoprotein-based nanoparticles. One such particle is the hepatitis B virus surface antigen (sAg) that exists as nanoparticles. Here we show, using biochemical analysis coupled with electron microscopy, that sAg nanoparticle disassembly requires both reducing agent to disrupt intermolecular disulfide bonds, and detergent to disrupt hydrophobic interactions that stabilize the nanoparticle...
January 3, 2017: Virology
https://www.readbyqxmd.com/read/28057521/biodegradable-nanoparticle-delivery-of-inactivated-swine-influenza-virus-vaccine-provides-heterologous-cell-mediated-immune-response-in-pigs
#11
Santosh Dhakal, Jagadish Hiremath, Kathryn Bondra, Yashavanth S Lakshmanappa, Duan-Liang Shyu, Kang Ouyang, Kyung-Il Kang, Basavaraj Binjawadagi, Jonathan Goodman, Kairat Tabynov, Steven Krakowka, Balaji Narasimhan, Chang-Won Lee, Gourapura J Renukaradhya
Swine influenza virus (SwIV) is one of the important zoonotic pathogens. Current flu vaccines have failed to provide cross-protection against evolving viruses in the field. Poly lactic-co-glycolic acid (PLGA) is a biodegradable FDA approved polymer and widely used in drug and vaccine delivery. In this study, inactivated SwIV H1N2 antigens (KAg) encapsulated in PLGA nanoparticles (PLGA-KAg) were prepared, which were spherical in shape with 200 to 300nm diameter, and induced maturation of antigen presenting cells in vitro...
January 2, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28057386/nanoparticles-decorated-with-viral-antigens-are-more-immunogenic-at-low-surface-density
#12
Matthew G Brewer, Anthony DiPiazza, Joshua Acklin, Changyong Feng, Andrea J Sant, Stephen Dewhurst
There is an urgent need to develop protective vaccines for high priority viral pathogens. One approach known to enhance immune responses to viral proteins is to display them on a nanoparticle (NP) scaffold. However, little is known about the effect of protein density on the B cell response to antigens displayed on NPs. To address this question HIV-1 Envelope (Env) and influenza hemagglutinin (HA) were displayed on a polystyrene-based NP scaffold at various densities - corresponding to mean antigen distances that span the range encountered on naturally occurring virions...
January 3, 2017: Vaccine
https://www.readbyqxmd.com/read/28049014/chitosan-sulfated-locust-bean-gum-nanoparticles-in-vitro-and-in-vivo-evaluation-towards-an-application-in-oral-immunization
#13
Luis Braz, Ana Grenha, Domingos Ferreira, Ana M Rosa da Costa, Carlos Gamazo, Bruno Sarmento
This work proposes the design of nanoparticles based on locus bean gum (LBG) and chitosan to be used as oral immunoadjuvant for vaccination purposes. LBG-based nanoparticles were prepared by mild polyelectrolyte complexation between chitosan (CS) and a synthesized LBG sulfate derivative (LBGS). Morphological characterization suggested that nanoparticles present a solid and compact structure with spherical-like shape. Sizes around 180-200nm and a positive surface charge between +9mV and +14mV were obtained. CS/LBGS nanoparticles did not affect cell viability of Caco-2 cells after 3h and 24h of exposure when tested at concentrations up to 1...
December 31, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28045984/characterization-of-innate-responses-induced-by-plga-encapsulated-and-soluble-tlr-ligands-in-vitro-and-in-vivo-in-chickens
#14
Tamiru N Alkie, Khaled Taha-Abdelaziz, Neda Barjesteh, Jegarubee Bavananthasivam, Douglas C Hodgins, Shayan Sharif
Natural or synthetic Toll-like receptor (TLR) ligands trigger innate responses by interacting with distinct TLRs. TLR ligands can thus serve as vaccine adjuvants or stand-alone antimicrobial agents. One of the limitations of TLR ligands for clinical application is their short half-life and rapid clearance from the body. In the current study, encapsulation of selected TLR ligands in biodegradable poly(D,L-lactide-co-glycolide) polymer nanoparticles (PLGA NPs) was examined in vitro and in vivo as a means to prolong innate responses...
2017: PloS One
https://www.readbyqxmd.com/read/28045484/development-of-autologous-c5-vaccine-nanoparticles-to-reduce-intravascular-hemolysis-in-vivo
#15
Lingjun Zhang, Wen Qiu, Stephen Crooke, Yan Li, Areeba Abid, Bin Xu, M G Finn, Feng Lin
The complement system is emerging as a new target for treating many diseases. For example, Eculizumab, a humanized monoclonal antibody against complement component 5 (C5), has been approved for paroxysmal nocturnal hemoglobinuria (PNH) in which patient erythrocytes are lysed by complement. In this study, we developed vaccines to elicit autologous anti-C5 antibody production in mice for complement inhibition. Immunization of mice with a conservative C5 xenoprotein raised high titers of IgG's against the xenogenous C5, but these antibodies did not reduce C5 activity in the blood...
January 12, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28025949/targeted-nanoparticles-for-the-treatment-of-alzheimer-s-disease
#16
Rafael Martín-Rapún, Laura De Matteis, Alfredo Ambrosone, Sonia García-Embid, Lucía Gutiérrez, Jesús M de la Fuente
BACKGROUND: Alzheimer's disease (AD) has a dramatic impact on society. The therapeutic targets are located in the central nervous system (CNS), which limits the efficacy of drugs systemically administered: the blood brain barrier (BBB) selectively allows the permeation of just a few kinds of molecules from the systemic circulation to the CNS. On the other hand, local administration routes to CNS are highly invasive. METHODS: In this article, we have reviewed therapeutic approaches against AD, which are based on nanoparticles targeted to the brain and to the pathological hallmarks of the disease...
December 26, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27993599/cd73-specific-sirna-loaded-chitosan-lactate-nanoparticles-potentiate-the-antitumor-effect-of-a-dendritic-cell-vaccine-in-4t1-breast-cancer-bearing-mice
#17
Farhad Jadidi-Niaragh, Fatemeh Atyabi, Ali Rastegari, Nasim Kheshtchin, Samaneh Arab, Hadi Hassannia, Maryam Ajami, Zahra Mirsanei, Sima Habibi, Farimah Masoumi, Farshid Noorbakhsh, Fazel Shokri, Jamshid Hadjati
The efficacy of conventional anti-tumor immunotherapeutic approaches is markedly affected by the immunosuppressive microenvironment of tumor. Since adenosine is one of the main orchestra leaders in immunosuppression symphony of tumor, targeting its producing molecules such as CD73 can help to achieve a better clinical outcome following conventional cancer immunotherapeutic approaches. In the present study, we evaluated the efficacy of CD73-specific siRNA-loaded chitosan-lactate nanoparticles (ChLa NPs) in combination with tumor lysate pulsed dendritic cells (DCs) vaccine in treatment of 4T1 (murine derived) breast cancer bearing mice...
December 18, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/27989827/induction-of-a-balanced-th1-th2-immune-responses-by-co-delivery-of-plga-ovalbumin-nanospheres-and-cpg-odns-pei-swcnt-nanoparticles-as-tlr9-agonist-in-balb-c-mice
#18
Mahboubeh Ebrahimian, Maryam Hashemi, Mohsen Maleki, Khalil Abnous, Gholamreza Hashemitabar, Mohammad Ramezani, Alireza Haghparast
To develop effective and safe vaccines with reduced dose of antigen and adjuvant, intelligent delivery systems are required. Many delivery systems have been developed to enhance the biological activity of cytosine-phosphorothioate-guanine oligodeoxynucleotides (CpG ODN) as both immunotherapeutic agents and vaccine adjuvants. In this study we designed a novel CpG ODN delivery system based on single-walled carbon nanotube (SWCNT) functionalized with polyethylenimine (PEI) and alkylcarboxylated PEI (AL-PEI). The physicochemical characteristics, cytotoxicity and cellular uptake studies of these carriers were performed...
October 29, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27987145/nucleoside-modified-mrna-vaccines-for-infectious-diseases
#19
Norbert Pardi, Drew Weissman
In recent years, numerous studies have demonstrated the outstanding abilities of mRNA to elicit potent immune responses against pathogens, making it a viable new platform for vaccine development (reviewed in Weissman, Expert Rev Vaccines 14:265-281, 2015; Sahin et al., Nat Rev Drug Discov 13:759-780, 2014). The incorporation of modified nucleosides in mRNA has many advantages and is currently undergoing a renaissance in the field of therapeutic protein delivery. Its use in a vaccine against infectious diseases has only begun to be described, but offers advantages for the generation of potent and long-lived antibody responses...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27987143/plant-expression-of-trans-encapsidated-viral-nanoparticle-vaccines-with-animal-rna-replicons
#20
Yiyang Zhou, Alison A McCormick, Christopher M Kearney
In this protocol, we outline how to produce a live viral nanoparticle vaccine in a biosafety level 1 (BSL1) environment. An animal viral vector RNA encapsidated with tobacco mosaic virus (TMV) coat protein can be fully assembled in planta. Agrobacterium cultures containing each component are inoculated together into tobacco leaves and the self-assembled hybrid nanoparticle vaccine is harvested 4 days later and purified with a simple PEG precipitation. The viral RNA delivery vector is derived from the BSL1 insect virus, Flock House virus (FHV), and replicates in human and animal cells but does not spread systemically...
2017: Methods in Molecular Biology
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