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Biomaterial vaccine

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https://www.readbyqxmd.com/read/28428810/recent-achievements-obtained-by-chloroplast-transformation
#1
REVIEW
Muhamed Adem, Dereje Beyene, Tileye Feyissa
Chloroplasts play a great role for sustained wellbeing of life on the planet. They have the power and raw materials that can be used as sophisticated biological factories. They are rich in energy as they have lots of pigment-protein complexes capable of collecting sunlight, in sugar produced by photosynthesis and in minerals imported from the plant cell. Chloroplast genome transformation offers multiple advantages over nuclear genome which among others, include: integration of the transgene via homologus recombination that enables to eliminate gene silencing and position effect, higher level of transgene expression resulting into higher accumulations of foreign proteins, and significant reduction in environmental dispersion of the transgene due to maternal inheritance which helps to minimize the major critic of plant genetic engineering...
2017: Plant Methods
https://www.readbyqxmd.com/read/28405506/oral-delivery-of-tumor-microparticle-vaccines-activates-nod2-signaling-pathway-in-ileac-epithelium-rendering-potent-antitumor-t-cell-immunity
#2
Wenqian Dong, Huafeng Zhang, Xiaonan Yin, Yuying Liu, Degao Chen, Xiaoyu Liang, Xun Jin, Jiadi Lv, Jingwei Ma, Ke Tang, Zhuowei Hu, Xiaofeng Qin, Bo Huang
Exploiting gut mucosal immunity to design new antitumor vaccination strategy remains unexplored. Tumor cell-derived microparticles (T-MP) are natural biomaterials that are capable of delivering tumor antigens and innate signals to dendritic cells (DC) for tumor-specific T cell immunity. Here, we show that T-MPs by oral vaccination route effectively access and activate mucosal epithelium, leading to subsequent antitumor T cell responses. Oral vaccination of T-MPs generated potent inhibitory effect against the growth of B16 melanoma and CT26 colon cancer in mice, which required both T cell and DC activation...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28365480/rational-design-of-charged-peptides-that-self-assemble-into-robust-nanofibers-as-immune-functional-scaffolds
#3
Hangyu Zhang, Jaehyung Park, Yonghou Jiang, Kim A Woodrow
Self-assembling peptides programed by sequence design to form predefined nanostructures are useful for a variety of biomedical applications. However, assemblies of classic ionic self-complementary peptides are unstable in neutral pH, while charged peptide hydrogels have low mechanical strength. Here, we report on the rational design of a self-assembling peptide system with optimized charge distribution and density for bioscaffold development. Our designer peptides employs a sequence pattern that undergoes salt triggered self-assembly into β-sheet rich cationic nanofibers in the full pH range (pH 0 to 14)...
March 29, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28240182/integration-of-novel-materials-and-advanced-omics-technologies-into-new-vaccine-design
#4
Wenzhen Liao, Tian-Tian Zhang, Liqian Gao, Su Seong Lee, Jie Xu, Han Zhang, Zhaogang Yang, Zhaoyu Liu, Wen Li
Designing new vaccines is one of the most challenging tasks for public health to prevent both infectious and chronic diseases. Even though many research scientists have spent great efforts in improving the specificity, sensitivity and safety of current available vaccines, there are still much space on how to effectively combine different biomaterials and technologies to design universal or personalized vaccines. Traditionally, vaccines were made based on empirical approaches designed to mimic immunity induced by natural infection...
February 24, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28153762/chitosan-zein-nano-in-microparticles-capable-of-mediating-in-vivo-transgene-expression-following-oral-delivery
#5
Eric Farris, Deborah M Brown, Amanda E Ramer-Tait, Angela K Pannier
The oral route is an attractive delivery route for the administration of DNA-based therapeutics, specifically for applications in gene therapy and DNA vaccination. However, oral DNA delivery is complicated by the harsh and variable conditions encountered throughout gastrointestinal (GI) transit, leading to degradation of the delivery vector and DNA cargo, and subsequent inefficient delivery to target cells. In this work, we demonstrate the development and optimization of a hybrid-dual particulate delivery system consisting of two natural biomaterials, zein (ZN) and chitosan (CS), to mediate oral DNA delivery...
March 10, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28091625/mplex-a-method-for-simultaneous-pathogen-inactivation-and-extraction-of-samples-for-multi-omics-profiling
#6
Kristin E Burnum-Johnson, Jennifer E Kyle, Amie J Eisfeld, Cameron P Casey, Kelly G Stratton, Juan F Gonzalez, Fabien Habyarimana, Nicholas M Negretti, Amy C Sims, Sadhana Chauhan, Larissa B Thackray, Peter J Halfmann, Kevin B Walters, Young-Mo Kim, Erika M Zink, Carrie D Nicora, Karl K Weitz, Bobbie-Jo M Webb-Robertson, Ernesto S Nakayasu, Brian Ahmer, Michael E Konkel, Vladimir Motin, Ralph S Baric, Michael S Diamond, Yoshihiro Kawaoka, Katrina M Waters, Richard D Smith, Thomas O Metz
The continued emergence and spread of infectious agents is of great concern, and systems biology approaches to infectious disease research can advance our understanding of host-pathogen relationships and facilitate the development of new therapies and vaccines. Molecular characterization of infectious samples outside of appropriate biosafety containment can take place only subsequent to pathogen inactivation. Herein, we describe a modified Folch extraction using chloroform/methanol that facilitates the molecular characterization of infectious samples by enabling simultaneous pathogen inactivation and extraction of proteins, metabolites, and lipids for subsequent mass spectrometry-based multi-omics measurements...
January 26, 2017: Analyst
https://www.readbyqxmd.com/read/27974752/biomaterials-how-additives-preserve-vaccines
#7
(no author information available yet)
No abstract text is available yet for this article.
December 14, 2016: Nature
https://www.readbyqxmd.com/read/27918020/effects-of-ovalbumin-protein-nanoparticle-vaccine-size-and-coating-on-dendritic-cell-processing
#8
Timothy Z Chang, Samantha S Stadmiller, Erika Staskevicius, Julie A Champion
Nanoparticle vaccine delivery platforms are a promising technology for enhancing vaccine immunogenicity. Protein nanoparticles (PNPs), made entirely from antigen, have been shown to induce protective immune responses against influenza. However, the fundamental mechanisms by which PNPs enhance component protein immunogenicity are not understood. Here, we investigate the role of size and coating of model ovalbumin (OVA) PNPs on particle uptake and trafficking, as well as on inflammation and maturation factor expression in dendritic cells (DCs) in vitro...
January 31, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/27819009/chitin-and-chitosan-production-and-application-of-versatile-biomedical-nanomaterials
#9
Daniel Elieh-Ali-Komi, Michael R Hamblin
Chitin is the most abundant aminopolysaccharide polymer occurring in nature, and is the building material that gives strength to the exoskeletons of crustaceans, insects, and the cell walls of fungi. Through enzymatic or chemical deacetylation, chitin can be converted to its most well-known derivative, chitosan. The main natural sources of chitin are shrimp and crab shells, which are an abundant byproduct of the food-processing industry, that provides large quantities of this biopolymer to be used in biomedical applications...
March 2016: International Journal of Advanced Research
https://www.readbyqxmd.com/read/27816821/enhanced-antitumor-immunity-by-targeting-dendritic-cells-with-tumor-cell-lysate-loaded-chitosan-nanoparticles-vaccine
#10
Gao-Na Shi, Chuang-Nian Zhang, Rong Xu, Jin-Feng Niu, Hui-Juan Song, Xiu-Yuan Zhang, Wei-Wei Wang, Yan-Ming Wang, Chen Li, Xiao-Qing Wei, De-Ling Kong
Whole tumor cell lysates (TCL) have been implemented as tumor antigens for cancer vaccine development, although clinical outcomes of TCL-based antitumor immunotherapy remain unsatisfactory. In order to improve the efficacy of TCL-based vaccines, biomaterials have been employed to enhance antigen delivery and presentation. Here, we have developed chitosan nanoparticles (CTS NPs) with surface mannose (Man) moieties for specific dendritic cells (DCs) targeting (Man-CTS NPs). The Man-CTS NPs were then loaded with TCL generated from B16 melanoma cells (Man-CTS-TCL NPs) for in vitro and in vivo assessment...
January 2017: Biomaterials
https://www.readbyqxmd.com/read/27800166/an-assessment-of-the-future-impact-of-alternative-technologies-on-antibiotics-markets
#11
Ejike Nwokoro, Ross Leach, Christine Årdal, Enrico Baraldi, Kellie Ryan, Jens Plahte
BACKGROUND: The increasing threat of antimicrobial resistance combined with the paucity of new classes of antibiotics represents a serious public health challenge. New treatment technologies could, in theory, have a significant impact on the future use of traditional antibiotics, be it by facilitating rational and responsible use or by product substitution in the existing antibiotics markets, including by reducing the incidence of bacterial infections through preventative approaches. The aim of this paper is to assess the potential of alternative technologies in reducing clinical use of and demand for antibiotics, and to briefly indicate which segments of the antibiotics market that might be impacted by these technologies...
2016: Journal of Pharmaceutical Policy and Practice
https://www.readbyqxmd.com/read/27716780/complex-particulate-biomaterials-as-immunostimulant-delivery-platforms
#12
Débora Torrealba, Joaquin Seras-Franzoso, Uwe Mamat, Kathleen Wilke, Antonio Villaverde, Nerea Roher, Elena Garcia-Fruitós
The control of infectious diseases is a major current challenge in intensive aquaculture. Most commercial vaccines are based on live attenuated or inactivated pathogens that are usually combined with adjuvants, oil emulsions being as the most widely used for vaccination in aquaculture. Although effective, the use of these oil emulsions is plagued with important side effects. Thus, the development of alternative safer and cost-effective immunostimulants and adjuvants is highly desirable. Here we have explored the capacity of inclusion bodies produced in bacteria to immunostimulate and protect fish against bacterial infections...
2016: PloS One
https://www.readbyqxmd.com/read/27680575/switching-the-immunogenicity-of-peptide-assemblies-using-surface-properties
#13
Yi Wen, Amelia Waltman, Huifang Han, Joel H Collier
Biomaterials created from supramolecular peptides, proteins, and their derivatives have been receiving increasing interest for both immunological applications, such as vaccines and immunotherapies, as well as ostensibly nonimmunological applications, such as therapeutic delivery or tissue engineering. However, simple rules for either maximizing immunogenicity or abolishing it have yet to be elucidated, even though immunogenicity is a prime consideration for the design of any supramolecular biomaterial intended for use in vivo...
October 3, 2016: ACS Nano
https://www.readbyqxmd.com/read/27597649/%C3%AE-helical-coiled-coil-peptide-materials-for-biomedical-applications
#14
REVIEW
Yaoying Wu, Joel H Collier
Self-assembling coiled coils, which occur commonly in native proteins, have received significant interest for the design of new biomaterials-based medical therapies. Considerable effort over recent years has led to a detailed understanding of the self-assembly process of coiled coils, and a diverse collection of strategies have been developed for designing functional materials using this motif. The ability to engineer the interface between coiled coils allows one to achieve variously connected components, leading to precisely defined structures such as nanofibers, nanotubes, nanoparticles, networks, gels, and combinations of these...
March 2017: Wiley Interdisciplinary Reviews. Nanomedicine and Nanobiotechnology
https://www.readbyqxmd.com/read/27567213/impact-of-dose-route-and-composition-on-the-immunogenicity-of-immune-polyelectrolyte-multilayers-delivered-on-gold-templates
#15
Peipei Zhang, James I Andorko, Christopher M Jewell
Biomaterial vaccines offer new capabilities that can be exploited for both infectious disease and cancer. We recently developed a novel vaccine platform based on self-assembly of immune signals into immune polyelectrolyte multilayers (iPEMs). These iPEM vaccines are electrostatically assembled from peptide antigens and nucleic acid-based toll-like receptor agonists (TLRas) that serve as molecular adjuvants. Gold nanoparticles (AuNPs) coated with iPEMs stimulate effector cytokine secretion in vitro and expand antigen-specific T cells in mice...
February 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/27547269/targeted-programming-of-the-lymph-node-environment-causes-evolution-of-local-and-systemic-immunity
#16
James I Andorko, Joshua M Gammon, Lisa H Tostanoski, Qin Zeng, Christopher M Jewell
Biomaterial vaccines offer cargo protection, targeting, and co-delivery of signals to immune organs such as lymph nodes (LNs), tissues that coordinate adaptive immunity. Understanding how individual vaccine components impact immune response has been difficult owing to the systemic nature of delivery. Direct intra-lymph node (i.LN.) injection offers a unique opportunity to dissect how the doses, kinetics, and combinations of signals reaching LNs influence the LN environment. Here, i.LN. injection was used as a tool to study the local and systemic responses to vaccines comprised of soluble antigen and degradable polymer particles encapsulating toll-like receptor agonists as adjuvants...
2016: Cellular and Molecular Bioengineering
https://www.readbyqxmd.com/read/27494238/advances-and-potential-applications-of-chitosan-nanoparticles-as-a-delivery-carrier-in-the-vaccine
#17
Kai Zhao, Dan Li, Hong Kang, Yu Guang Rong, Xiaohua Wang, Zheng Jin
Chitosan, a natural polysaccharide derived from chitin, has been widely applied in drug delivery, tissue regeneration, wound healing, blood coagulation and immunostimulation due to its well-known biocompatibility and biodegradability. Chitosan has become a valuable vaccine adjuvant and delivery carrier, which have attracted increasing attention for its applications. Currently chitosan nanoparticles have been developed as adjuvant or immunomodulators and drug carrier. Here we reviewed chitosan nanoparticles, which is a promising biomaterial as vaccine adjuvant and delivery carrier, including characteristics, preparation methods and applications, or even its limitations...
August 4, 2016: Current Drug Delivery
https://www.readbyqxmd.com/read/27494157/advances-and-potential-applications-of-chitosan-nanoparticles-as-a-delivery-carrier-for-the-mucosal-immunity-of-vaccine
#18
Dan Li, Dongwei Fu, Hong Kang, Guangyu Rong, Zheng Jin, Xiaohua Wang, Kai Zhao
BACKGROUND: Drug research and development has entered into the new epoch of innovation formulation, and the drug delivery system has been in the forefront of pharmaceutical innovation. Chitosan, a natural polysaccharide derived from chitin, due to its well-known biocompatibility and biodegradability, it has been widely used in drug delivery, immunostimulation, tissue regeneration, blood coagulation, wound healing, drug delivery and tissue engineering. Chitosan has become a valuable vaccine adjuvant and delivery carrier, which have attracted increasing attention for its applications...
2017: Current Drug Delivery
https://www.readbyqxmd.com/read/27419235/in-situ-pneumococcal-vaccine-production-and-delivery-through-a-hybrid-biological-biomaterial-vector
#19
Yi Li, Marie Beitelshees, Lei Fang, Andrew Hill, Mahmoud Kamal Ahmadi, Mingfu Chen, Bruce A Davidson, Paul Knight, Randall J Smith, Stelios T Andreadis, Anders P Hakansson, Charles H Jones, Blaine A Pfeifer
The type and potency of an immune response provoked during vaccination will determine ultimate success in disease prevention. The basis for this response will be the design and implementation of antigen presentation to the immune system. Whereas direct antigen administration will elicit some form of immunological response, a more sophisticated approach would couple the antigen of interest to a vector capable of broad delivery formats and designed for heightened response. New antigens associated with pneumococcal disease virulence were used to test the delivery and adjuvant capabilities of a hybrid biological-biomaterial vector consisting of a bacterial core electrostatically coated with a cationic polymer...
July 2016: Science Advances
https://www.readbyqxmd.com/read/27380137/assembly-and-immunological-processing-of-polyelectrolyte-multilayers-composed-of-antigens-and-adjuvants
#20
Yu-Chieh Chiu, Joshua M Gammon, James I Andorko, Lisa H Tostanoski, Christopher M Jewell
While biomaterials provide a platform to control the delivery of vaccines, the recently discovered intrinsic inflammatory characteristics of many polymeric carriers can also complicate rational design because the carrier itself can alter the response to other vaccine components. To address this challenge, we recently developed immune-polyelectrolyte multilayer (iPEMs) capsules electrostatically assembled entirely from peptide antigen and molecular adjuvants. Here, we use iPEMs built from SIINFEKL model antigen and polyIC, a stimulatory toll-like receptor agonist, to investigate the impact of pH on iPEM assembly, the processing and interactions of each iPEM component with primary immune cells, and the role of these interactions during antigen-specific T cell responses in coculture and mice...
July 27, 2016: ACS Applied Materials & Interfaces
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