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https://www.readbyqxmd.com/read/28211908/the-n-terminal-domain-of-schmallenberg-virus-envelope-protein-gc-is-highly-immunogenic-and-can-provide-protection-from-infection
#1
Kerstin Wernike, Andrea Aebischer, Gleyder Roman-Sosa, Martin Beer
Schmallenberg virus (SBV) is transmitted by insect vectors, and therefore vaccination is one of the most important tools of disease control. In our study, novel subunit vaccines on the basis of an amino-terminal domain of SBV Gc of 234 amino acids ("Gc Amino") first were tested and selected using a lethal small animal challenge model and then the best performing formulations also were tested in cattle. We could show that neither E. coli expressed nor the reduced form of "Gc Amino" protected from SBV infection...
February 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28211299/comparison-of-biodistribution-profile-of-monoclonal-antibodies-nanoparticles-and-aptamers-in-rats-with-breast-cancer
#2
Cristal Cerqueira-Coutinho, Sotiris Missailidis, Jéssica Alessandra-Perini, Daniel Escorsim Machado, Jamila Alessandra Perini, Ralph Santos-Oliveira
The use of monoclonal antibodies and aptamers is growing every single day, as the use of nanoparticle systems. Although most of the products are under investigation, there are a few commercialized products available at the market, for human consume. In this study, we have compared three formulations (aptamer anti-MUC1, monoclonal antibody - Trastuzumab and monoclonal antibodies nanoparticles - PLA/PVA/MMT trastuzumab) to identify their profile as also to understand their behavior into an alive biological system...
May 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28210631/immunogenicity-and-cross-protection-in-mice-afforded-by-pandemic-h1n1-live-attenuated-influenza-vaccine-containing-wild-type-nucleoprotein
#3
Andrey Rekstin, Irina Isakova-Sivak, Galina Petukhova, Daniil Korenkov, Igor Losev, Tatiana Smolonogina, Tatiana Tretiak, Svetlana Donina, Svetlana Shcherbik, Tatiana Bousse, Larisa Rudenko
Since conserved viral proteins of influenza virus, such as nucleoprotein (NP) and matrix 1 protein, are the main targets for virus-specific CD8+ cytotoxic T-lymphocytes (CTLs), we hypothesized that introduction of the NP gene of wild-type virus into the genome of vaccine reassortants could lead to better immunogenicity and afford better protection. This paper describes in vitro and in vivo preclinical studies of two new reassortants of pandemic H1N1 live attenuated influenza vaccine (LAIV) candidates. One had the hemagglutinin (HA) and neuraminidase (NA) genes from A/South Africa/3626/2013 H1N1 wild-type virus on the A/Leningrad/134/17/57 master donor virus backbone (6 : 2 formulation) while the second had the HA, NA, and NP genes of the wild-type virus on the same backbone (5 : 3 formulation)...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28209480/thermal-stabilization-of-anti-%C3%AE-cobratoxin-single-domain-antibodies
#4
George P Anderson, Jessica H Liu, Dan Zabetakis, Jinny L Liu, Ellen R Goldman
There is an unmet need for snake antivenoms that can be stored ready to use near the point of care. To address that need we have taken two anti-α-cobratoxin single domain antibodies and increased their thermal stability to improve their ambient temperature shelf-life. The anti-α-cobratoxin single domain antibodies C2 and C20 were first isolated, and demonstrated to be toxin neutralizing by Richard et al., 2013 (Richard, G., Meyers, A.J., McLean, M.D., Arbabi-Ghahroudi, M., MacKenzie, R., Hall, J.C., 2013...
February 13, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28194565/transgenic-papaya-a-useful-platform-for-oral-vaccines
#5
Gladis Fragoso, Marisela Hernández, Jacquelynne Cervantes-Torres, Rubén Ramírez-Aquino, Héctor Chapula, Nelly Villalobos, René Segura-Velázquez, Alfredo Figueroa, Iván Flores, Herminio Jiménez, Laura Adalid, Gabriela Rosas, Luis Galvez, Elias Pezzat, Elizabeth Monreal-Escalante, Sergio Rosales-Mendoza, Luis G Vazquez, Edda Sciutto
Transgenic papaya callus lines expressing the components of the S3Pvac vaccine constitute a stable platform to produce an oral vaccine against cysticercosis caused by Taenia solium or T. crassiceps. The development of effective delivery systems to cope with the reduced immunogenicity of new subunit vaccines is a priority in vaccinology. Herein, experimental evidence supporting a papaya-based platform to produce needle-free, recombinant, highly immunogenic vaccines is shown. Papaya (Carica papaya) callus lines were previously engineered by particle bombardment to express the three protective peptides of the S3Pvac anti-cysticercosis vaccine (KETc7, KETc12, KETc1)...
February 13, 2017: Planta
https://www.readbyqxmd.com/read/28192417/defining-b-cell-immunodominance-to-viruses
#6
Davide Angeletti, James S Gibbs, Matthew Angel, Ivan Kosik, Heather D Hickman, Gregory M Frank, Suman R Das, Adam K Wheatley, Madhu Prabhakaran, David J Leggat, Adrian B McDermott, Jonathan W Yewdell
Immunodominance (ID) defines the hierarchical immune response to competing antigens in complex immunogens. Little is known regarding B cell and antibody ID despite its importance in immunity to viruses and other pathogens. We show that B cells and serum antibodies from inbred mice demonstrate a reproducible ID hierarchy to the five major antigenic sites in the influenza A virus hemagglutinin globular domain. The hierarchy changed as the immune response progressed, and it was dependent on antigen formulation and delivery...
February 13, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28187952/immunogenicity-and-safety-of-an-as03-adjuvanted-h7n1-vaccine-in-healthy-adults-a-phase-i-ii-observer-blind-randomized-controlled-trial
#7
Anuradha Madan, Murdo Ferguson, Eric Sheldon, Nathan Segall, Laurence Chu, Azhar Toma, Paul Rheault, Damien Friel, Jyoti Soni, Ping Li, Bruce L Innis, Anne Schuind
BACKGROUND: H7 influenza strains have pandemic potential. AS03-adjuvanted H7N1 A/mallard/Netherlands/12/2000 split-virion vaccine formulations were evaluated as model H7-subtype vaccine and tested after H7N9 emerged in China, and caused severe human disease with high mortality. METHODS: In this phase I/II, observer-blind, randomized trial in US and Canada, 420 healthy adults (21-64years) were randomized to receive 1 of 4 H7N1 vaccine formulations (3.75 or 7.5μg hemagglutinin adjuvanted with either AS03A or AS03B), 15μg unadjuvanted H7N1 hemagglutinin, or saline placebo, given as 2-dose series...
February 7, 2017: Vaccine
https://www.readbyqxmd.com/read/28186329/effects-of-antibody-disulfide-bond-reduction-on-purification-process-performance-and-final-drug-substance-stability
#8
Wai Keen Chung, Brian Russell, Yanhong Yang, Michael Handlogten, Suzanne Hudak, Mingyan Cao, Jihong Wang, David Robbins, Sanjeev Ahuja, Min Zhu
Antibody disulfide bond reduction during monoclonal antibody (mAb) production is a phenomenon that has been attributed to the reducing enzymes from CHO cells acting on the mAb during the harvest process. However, the impact of antibody reduction on the downstream purification process has not been studied. During the production of an IgG2 mAb, antibody reduction was observed in the harvested cell culture fluid (HCCF), resulting in high fragment levels. In addition, aggregate levels increased during the low pH treatment step in the purification process...
February 10, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/28183282/enhanced-and-long-term-immunogenicity-of-a-her-2-neu-multi-epitope-vaccine-conjugated-to-the-carrier-crm197-in-conjunction-with-the-adjuvant-montanide
#9
Joshua Tobias, Joanna Jasinska, Karin Baier, Michael Kundi, Nicholas Ede, Christoph Zielinski, Ursula Wiedermann
BACKGROUND: We previously identified three short single peptides (P4, P6 and P7) representing different B-cell epitopes on the extracellular domain of Her-2/neu for a vaccine that was tested in a phase-I clinical trial. Here we describe the improvement of the multi peptide vaccine by fusing the single peptides to a hybrid peptide P467. METHODS: After coupling to either virosomes or to diphtheria toxoid CRM197 (CRM), the hybrid peptide was tested in different concentrations in combination with either Montanide or Aluminium hydroxide (Alum) in preclinical studies...
February 9, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28181275/preparation-of-clinical-scale-177-lu-rituximab-optimization-of-protocols-for-conjugation-radiolabeling-and-freeze-dried-kit-formulation
#10
Mohini Guleria, Tapas Das, Chandan Kumar, Jeyachitra Amirdhanayagam, Haladhar D Sarma, Sharmila Banerjee
Rituximab is a monoclonal chimeric antibody which has been approved by US FDA for immunotherapy of Non-Hodgkins' lymphoma (NHL). Bexxar and Zevalin are the two other approved radiolabeled antibodies for radioimmunotherapy of NHL; however the fact that they are of murine origin reduces their treatment efficacy. To circumvent this, efforts have been made to radiolabel Rituximab with various therapeutic radioisotopes. In the present study, an effort has been made to optimize the conjugation (BFCA and antibody) and radiolabeling procedures for the preparation of clinical-scale (177) Lu-labeled Rituximab...
February 8, 2017: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/28176187/brucellosis-and-associated-risk-factors-in-dairy-cattle-of-eastern-ethiopia
#11
Yitagele Terefe, Sisay Girma, Negesse Mekonnen, Biruhtesfa Asrade
Knowing the status of Bovine brucellosis and associated risk factors is a crucial step in formulating evidence based control scheme. In this study, a total of 967 dairy cows from 307 dairy farms in eastern Ethiopia were serologically tested for Brucella antibodies. The screening was done first using RBPT and positive samples were subsequently subjected to CFT for confirmation. A pre-tested structured questionnaire was used to collect relevant data from 307 dairy cattle owners or attendants to assess their awareness and routine practice...
February 7, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28174258/kinetic-modeling-of-the-release-of-ethylene-oxide-from-sterilized-plastic-containers-and-its-interaction-with-monoclonal-antibodies
#12
Bryan Lei Yu, Jun Han, Matthew Hammond, Xuemei Wang, Qingchun Zhang, Andrew Clausen, Ronald Forster, Mingda Eu
: Ethylene oxide (ETO) is commonly used to sterilize plastic containers, but the effects of residual amounts left after sterilization on protein therapeutics are still not well understood. Here we focus primarily on the factors that influence concentrations of ETO migrating from ETO-treated plastic containers into aqueous solution. A study was designed to investigate the kinetics of this process at various temperatures, and the kinetic data could be fit with a model based on a combination of Fickean diffusion and first-order chemical reaction (to account for observed hydrolysis of ETO)...
January 2017: PDA Journal of Pharmaceutical Science and Technology
https://www.readbyqxmd.com/read/28165831/paxvax-cvd-103-hgr-single-dose-live-oral-cholera-vaccine
#13
Myron M Levine, Wilbur H Chen, James B Kaper, Michael Lock, Lisa Danzig, Marc Gurwith
Cholera remains a problem in developing countries and a risk for travelers. Hypochlorhydria, blood group O, cardiac and renal disease increase the risk of developing cholera gravis. Oral vaccines containing inactivated Vibrio cholerae and requiring two doses are available in some countries. No cholera vaccine had been available for U.S. travelers for decades until 2016 when CVD 103-HgR (Vaxchora™), an oral live attenuated vaccine, was licensed by the U.S. FDA. Areas covered: Enduring protection following wild-type cholera provided the rationale to develop a single-dose live oral vaccine...
February 6, 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/28161682/preclinical-evaluation-of-taxane-binding-peptide-modified-polymeric-micelles-loaded-with-docetaxel-in-an-orthotopic-breast-cancer-mouse-model
#14
Jennifer Logie, Ahil N Ganesh, Ahmed M Aman, Rima S Al-Awar, Molly S Shoichet
We developed a novel taxane-binding peptide (TBP) modified, biodegradable polymeric micelle that overcomes limitations of drug loading and poor serum stability typically seen with particle delivery, leading to enhanced pharmacokinetics and tumor distribution of docetaxel (DTX). The use of the taxane-binding peptide to increase docetaxel loading is particularly compelling as it takes advantage of a known intracellular binding mechanism in a new way. Docetaxel is a potent chemotherapeutic with a therapeutic index often limited by the toxicity of the excipients that are necessary to enhance its solubility for intravenous delivery...
January 26, 2017: Biomaterials
https://www.readbyqxmd.com/read/28161578/consensus-m2e-peptide-conjugated-to-gold-nanoparticles-confers-protection-against-h1n1-h3n2-and-h5n1-influenza-a-viruses
#15
Wenqian Tao, Brett Hurst, Akhilesh K Shakya, Md Jasim Uddin, Rohan S Ingrole, Mayra Hernandez-Sanabria, Ravi Arya, Lynn Bimler, Silke Paust, E Bart Tarbet, Harvinder Singh Gill
The extracellular domain of influenza A ion channel membrane matrix protein 2 (M2e) is considered to be a potential candidate to develop a universal influenza A vaccine. However poor immunogenicity of M2e presents a significant roadblock. We have developed a vaccine formulation comprising of the consensus M2e peptide conjugated to gold nanoparticles (AuNPs) with CpG as a soluble adjuvant (AuNP-M2e + sCpG). We demonstrate that intranasal delivery of AuNP-M2e + sCpG in mice induces lung B cell activation and robust serum anti-M2e immunoglobulin G (IgG) response, with stimulation of both IgG1 and IgG2a subtypes...
February 1, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28161480/multifunctionalized-iron-oxide-nanoparticles-for-selective-targeting-of-pancreatic-cancer-cells
#16
Sara Trabulo, Antonio Aires, Alexandra Aicher, Christopher Heeschen, Aitziber L Cortajarena
Nanomedicine nowadays offers novel solutions in cancer therapy by introducing multimodal treatments in one single formulation. In addition, nanoparticles act as nanocarriers changing the solubility, biodistribution and efficiency of the therapeutic molecules, thus generating more efficient treatments and reducing their side effects. To apply these novel therapeutic approaches, efforts are focused on the multi-functionalization of the nanoparticles and will open up new avenues to advanced combinational therapies...
February 1, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28161464/mycobacterium-tuberculosis-proteins-involved-in-cell-wall-lipid-biosynthesis-improve-bcg-vaccine-efficacy-in-a-murine-tb-model
#17
REVIEW
Martin Rao, Nathalie Cadieux, Megan Fitzpatrick, Steven Reed, Sergei Arsenian, Davide Valentini, Shreemanta Parida, Ernest Dodoo, Alimuddin Zumla, Markus Maeurer
OBJECTIVES: Advances in tuberculosis (TB) vaccine development are urgently required to enhance global disease management. We evaluated the potential of Mycobacterium tuberculosis (M. tb)-derived protein antigens Rv0447c, Rv2957 and Rv2958c to boost BCG vaccine efficacy in the presence or absence of glucopyranosyl lipid adjuvant formulated in a stable emulsion (GLA-SE) adjuvant. METHODS: Mice received the BCG vaccine, followed by Rv0447c, Rv2957 and Rv2958c protein boosting with or without GLA-SE adjuvant 3 and 6 weeks later...
February 1, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28161037/therapeutics-for-equine%C3%A2-protozoal-myeloencephalitis
#18
REVIEW
Nicola Pusterla, Thomas Tobin
Equine protozoal myeloencephalitis is an infectious disease of the central nervous system caused by Sarcocystis neurona or Neospora hughesi. Affected horses routinely present with progressive and asymmetrical neurologic deficits. The diagnosis relies on the presence of neurologic signs, ruling out other neurologic disorders, and the detection of intrathecally derived antibodies to either S neurona and/or N hughesi. Recommended treatment is use of an FDA-approved anticoccidial drug formulation. Medical and supportive treatment is provided based on the severity of neurologic deficits and complications...
February 1, 2017: Veterinary Clinics of North America. Equine Practice
https://www.readbyqxmd.com/read/28159641/micro-flow-imaging-analyses-reflect-mechanisms-of-aggregate-formation-comparing-protein-particle-data-sets-using-the-kullback-leibler-divergence
#19
Nathaniel R Maddux, Austin L Daniels, Theodore W Randolph
Sub-visible particles in therapeutic protein formulations are an increasing manufacturing and regulatory concern due to their potential to cause adverse immune responses. Flow imaging microscopy is used extensively to detect sub-visible particles and investigate product deviations, typically by comparing imaging data using histograms of particle descriptors. Such an approach discards much information, and requires effort to interpret differences, which is problematic when comparing many data sets. We propose to compare imaging data by using the Kullback-Leibler divergence, an information theoretic measure of the difference of distributions...
January 31, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28157199/assessment-of-the-efficacy-of-two-novel-dna-vaccine-formulations-against-highly-pathogenic-porcine-reproductive-and-respiratory-syndrome-virus
#20
Luping Du, Fengjiao Pang, Zhengyu Yu, Xiangwei Xu, Baochao Fan, Kehe Huang, Kongwang He, Bin Li
Since May 2006, a highly pathogenic porcine reproductive and respiratory syndrome virus (HP-PRRSV) has emerged and prevailed in mainland China, affecting over 2 million pigs. Commercial PRRSV killed and modified live vaccines cannot provide complete protection against HP-PRRSV due to genetic variation. Development of more effective vaccines against the emerging HP-PRRSV is urgently required. In our previous studies, two formulations of DNA vaccines (pcDNA3.1-PoIFN-λ1-SynORF5 and BPEI/PLGA-SynORF5) based on the HP-PRRSV were constructed and shown to induce enhanced humoral and cellular immune responses in mice...
February 3, 2017: Scientific Reports
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