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https://www.readbyqxmd.com/read/28532011/molecularly-imprinted-polymer-for-human-viral-pathogen-detection
#1
REVIEW
Aijaz Ahmad Malik, Chanin Nantasenamat, Theeraphon Piacham
Molecular imprinting has become an attractive synthetic approach for the fabrication of novel functional polymers with pre-designed molecular target selectivity. Such molecularly imprinted polymers (MIPs) have been applied in wide range of areas such as chemical and biological sensors, solid phase extraction and drug assays owing to their inherent robustness, reusability and reproducibility. Furthermore, MIPs can also be used as tools for studies concerning antibody/receptor binding site mimicry as well as being used as antibody substitutes for biomedical applications...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531305/impact-of-age-and-antibody-type-on-progression-from-single-to-multiple-autoantibodies-in-type-1-diabetes-relatives
#2
Emanuele Bosi, David C Boulware, Dorothy J Becker, Jane H Buckner, Susan Geyer, Peter A Gottlieb, Courtney Henderson, Amanda Kinderman, Jay M Sosenko, Andrea K Steck, Polly J Bingley
Context: Islet autoantibodies are markers of type 1 diabetes and an increase in number of autoantibodies detected during the preclinical phase is predictive of progression to overt disease. Objective: To refine the impact of age in relation to islet antibody type on the progression from single to multiple autoantibodies in relatives of people with type 1 diabetes. Research design and methods: We examined 994 relatives with normal glucose tolerance and positive for a single autoantibody, followed prospectively in the TrialNet Pathway to Prevention...
May 22, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28530298/aptabody-aptatope-interactions-in-aptablotting-assays
#3
Simranjeet Singh Sekhon, Hyun-Ju Um, Woo-Ri Shin, Sang-Hee Lee, Jiho Min, Ji-Young Ahn, Yang-Hoon Kim
We demonstrate an aptablotting assay method that involves direct and indirect aptabody recognition. Nanoscale single-stranded DNA aptamers against GST and DIG-tags are utilized as aptabodies (GST-2 and DIG-1, respectively), and the GST-2 aptabody binding site, or aptatope, as predicted by a MOE-docking simulation of the protein-aptamer complex, shows the interaction of the GST-2 aptabody at the catalytically active region. The aptabody-aptatope interaction was evaluated by an in vitro enzyme inhibitory analysis...
May 22, 2017: Nanoscale
https://www.readbyqxmd.com/read/28529000/preclinical-evaluation-of-vis513-a-therapeutic-antibody-against-dengue-virus-in-non-human-primates
#4
Eugenia Z Ong, Yadunanda Budigi, Hwee Cheng Tan, Luke N Robinson, Kirk J Rowley, Alexander Winnett, Sven Hobbie, Zachary Shriver, Gregory J Babcock, Eng Eong Ooi
Despite useful in vivo activity, no therapeutic against dengue virus (DENV) has demonstrated efficacy in clinical trials. Herein, we explored dosing and virological endpoints to guide the design of human trials of VIS513, a pan-serotype anti-DENV IgG1 antibody, in non-human primates (NHPs). Dosing VIS513 pre- or post-peak viremia in NHPs neutralized infectious DENV although RNAemia remained detectable post-treatment; differential interaction of human IgGs with macaque Fc-gamma receptors may delay clearance of neutralized DENV...
May 18, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28528626/colloid-particle-formulations-for-antimicrobial-applications
#5
REVIEW
Ahmed F Halbus, Tommy S Horozov, Vesselin N Paunov
Colloidal particles are being extensively studied in various antimicrobial applications due to their small size to volume ratio and ability to exhibit a wide spectrum of antibacterial, antifungal, antialgal and antiviral action. The present review focuses on various nanoparticles (NPs) of inorganic, organic and hybrid materials, and discusses some of the methods for their preparation as well as mechanisms of their antimicrobial action. We consider the antimicrobial applications of metal oxide nanoparticles (ZnO, MgO, CuO, Cu2O, Al2O3, TiO2, CeO2 and Y2O3), metal nanoparticles (NPs), such as copper, silver and gold, metal hydroxide NPs such as Mg(OH)2 as well as hybrid NPs made from biodegradable materials, such as chitosan, lignin and dextran, loaded with other antimicrobial agents...
May 12, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28527886/immuno-pcr-a-new-technique-for-the-serodiagnosis-of-tuberculosis
#6
REVIEW
Promod K Mehta, Bhawna Dahiya, Suman Sharma, Netrapal Singh, Renu Dharra, Zoozeal Thakur, Neeru Mehta, Krishna B Gupta, Mahesh C Gupta, Dhruva Chaudhary
Rapid and accurate diagnosis of tuberculosis (TB) is essential to control the disease. The conventional microbiological tests have limitations and there is an urgent need to devise a simple, rapid and reliable point-of-care (POC) test. The failure of TB diagnostic tests based on antibody detection due to inconsistent and imprecise results has stimulated renewed interest in the development of rapid antigen detection methods. However, the World Health Organization (WHO) has emphasized to continue research for designing new antibody-based detection tests with improved accuracy...
May 17, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28527257/-polyclonal-antibodies-against-recombinant-dengue-virus-ns3-protein
#7
Liliana Morales, Myriam L Velandia, María Angélica Calderon, Jaime E Castellanos, Jacqueline Chaparro-Olaya
INTRODUCTION: Dengue is a disease caused by one of four serotypes of the dengue virus (DENV) and is endemic in approximately 130 countries. The incidence of dengue has increased dramatically in recent decades, as well as the frequency and magnitude of outbreaks. Despite all efforts, there are no prophylactic or therapeutic treatments for the disease. Accordingly, research on the processes governing the DENV infection cycle is essential to develop vaccines or antiviral therapies. One of themost attractive DENV molecules to investigate is nonstructural protein 3 (NS3), which is essential for viral replication and a major immune target for infection...
January 24, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/28525853/photoelectrochemical-sensitive-detection-of-insulin-based-on-cds-polydopamine-co-sensitized-wo3-nanorod-and-signal-amplification-of-carbon-nanotubes-polydopamine
#8
Rongyu Wang, Hongmin Ma, Yong Zhang, Qi Wang, Zhongping Yang, Bin Du, Dan Wu, Qin Wei
An ultrasensitive photoelectrochemical sandwich immunosensor was designed for detection of insulin based on WO3/CdS/polydopamine (WO3/CdS/PDA) co-sensitized and PDA@carbon nanotubes (PDA@CNT) conjugates for signal amplification. The CdS nanoparticles were first deposited on the WO3 nanorods via sequential chemical bath deposition to form the WO3/CdS structure to enhance photocurrent. Then equipped with PDA to form the WO3/CdS/PDA photosensitive structure. The PDA was used not only to reduce the toxicity of CdS but also adsorb insulin primary antibodies (Ab1)...
May 13, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28525849/novel-photoelectrochemical-immunosensor-for-disease-related-protein-assisted-by-hemin-g-quadruplex-based-dnazyme-on-gold-nanoparticles-to-enhance-cathodic-photocurrent-on-p-cubi2o4-semiconductor
#9
Shuzhen Lv, Kangyao Zhang, Zhenzhen Lin, Dianping Tang
A novel p-type semiconductor material (p-CuBi2O4) is designed for the construction of split-type photoelectrochemical (PEC) immunosensor for alpha-fetoprotein (AFP) with the hemin assistant to enhance the cathodic photocurrent. Initially, the photocathode of PEC immunosensor is fabricated by p-CuBi2O4 on a layer of gold nanoparticles (AuNPs, as a front contact of p-CuBi2O4) to enhance the efficiency of charge separation. In the presence of target AFP, a sandwich-type immunoreaction was carried out in capture antibody-coated microplate by using detection antibody and hemin-based G-quadruplex (labeled on the AuNP) as the signal probe...
May 13, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28525362/fgf21-receptor-agonists-an-emerging-therapeutic-class-for-obesity-related-diseases
#10
Junichiro Sonoda, Mark Z Chen, Amos Baruch
Fibroblast growth factor 21 (FGF21) analogs and FGF21 receptor agonists (FGF21RAs) that mimic FGF21 ligand activity constitute the new "FGF21-class" of anti-obesity and anti-diabetic molecules that improve insulin sensitivity, ameliorate hepatosteatosis and promote weight loss. The metabolic actions of FGF21-class proteins in obese mice are attributed to stimulation of brown fat thermogenesis and increased secretion of adiponectin. The therapeutic utility of this class of molecules is being actively investigated in clinical trials for the treatment of type 2 diabetes and non-alcoholic steatohepatitis (NASH)...
May 19, 2017: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/28523908/peptide-functionalized-nanomaterials-for-efficient-isolation-of-her2-positive-circulating-tumor-cells
#11
Jiaxi Peng, Qiong Zhao, Wangshu Zheng, Ping Li, Wenzhe Li, Ling Zhu, Xiaoran Liu, Bin Shao, Huiping Li, Chen Wang, Yanlian Yang
Specific antigen-positive circulating tumor cell (CTC) detection is necessary in therapeutic response monitoring and targeted therapy guidance. The existence of human epidermal growth factor receptor 2 (HER2) and the concentration of HER2-positive CTCs are strong indicators for patient diagnosis, prognosis, and therapeutic monitoring. We managed the direct isolation of HER2-positive CTCs by peptide-functionalized nanomaterials, designing and screening a peptide as an HER2 antibody alternative demonstrating high HER2 affinity and selectivity...
May 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28523586/ocrelizumab-first-global-approval
#12
James E Frampton
Ocrelizumab (Ocrevus™) is a humanised anti-CD20 monoclonal antibody that has been developed by Genentech, Inc. (a subsidiary of Roche) for the treatment of multiple sclerosis (MS). The drug is designed to deplete B cells, which play an important role in the pathogenesis of MS. In March 2017, ocrelizumab was approved in the USA for the treatment of patients with relapsing or primary progressive forms of MS; currently, it is awaiting approval in the EU for the same indications. This article summarizes the milestones in the development of ocrelizumab leading to its first global approval for the treatment of MS...
June 2017: Drugs
https://www.readbyqxmd.com/read/28522427/association-of-chitosan-and-aluminium-as-a-new-adjuvant-strategy-for-improved-vaccination
#13
F Lebre, D Bento, J Ribeiro, M Colaço, G Borchard, M C Pedroso de Lima, O Borges
The use of particulate adjuvants offers an interesting possibility to enhance and modulate the immune responses elicited by vaccines. Aluminium salts have been extensively used as vaccine adjuvants, but they lack the capacity to induce a strong cellular and mucosal immune response. Taking this into consideration, in this study we designed a new antigen delivery system combining aluminium salts with chitosan. Chitosan-aluminium nanoparticles (CH-Al NPs) exhibited a mean diameter of 280nm and a positive surface charge...
May 15, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28521808/b-cell-repopulation-kinetics-after-rituximab-treatment-in-anca-associated-vasculitides-compared-to-rheumatoid-arthritis-and-connective-tissue-diseases-a-longitudinal-observational-study-on-120-patients
#14
Jens Thiel, Marta Rizzi, Marie Engesser, Ann-Kathrin Dufner, Arianna Troilo, Raquel Lorenzetti, Reinhard E Voll, Nils Venhoff
BACKGROUND: B cell depletion with rituximab (RTX) is approved for treatment of rheumatoid arthritis (RA) and ANCA-associated vasculitides (AAV). Recently, RTX has been shown to be effective in AAV maintenance therapy, but an optimal RTX treatment schedule is unknown and the time to B cell repopulation after RTX has not been studied. METHODS: Retrospective single-center analysis of B cell repopulation in patients with AAV, RA or connective tissue disease (CTD) treated with RTX...
May 18, 2017: Arthritis Research & Therapy
https://www.readbyqxmd.com/read/28520525/companion-and-point-of-care-sensor-system-for-rapid-multiplexed-detection-of-a-panel-of-infectious-disease-markers
#15
Anjan Panneer Selvam, Shalini Prasad
A nanochannel-based electrochemical biosensor has been demonstrated for rapid and multiplexed detection of a panel of three biomarkers associated with rapid detection of sepsis. The label-free biosensor detected procalcitonin (PCT), lipoteichoic acid (LTA), and lipopolysaccharide (LPS) from human whole blood. The biosensor comprises a nanoporous nylon membrane integrated onto a microelectrode sensor platform for nanoconfinement effects. Charge perturbations due to biomarker binding are recorded as impedance changes using electrochemical impedance spectroscopy...
June 2017: SLAS Technology
https://www.readbyqxmd.com/read/28518172/super-resolution-microscopy-with-dna-paint
#16
Joerg Schnitzbauer, Maximilian T Strauss, Thomas Schlichthaerle, Florian Schueder, Ralf Jungmann
Super-resolution techniques have begun to transform biological and biomedical research by allowing researchers to observe structures well below the classic diffraction limit of light. DNA points accumulation for imaging in nanoscale topography (DNA-PAINT) offers an easy-to-implement approach to localization-based super-resolution microscopy, owing to the use of DNA probes. In DNA-PAINT, transient binding of short dye-labeled ('imager') oligonucleotides to their complementary target ('docking') strands creates the necessary 'blinking' to enable stochastic super-resolution microscopy...
June 2017: Nature Protocols
https://www.readbyqxmd.com/read/28518070/sample-preparation-for-mass-cytometry-analysis
#17
Ryan L McCarthy, Aundrietta D Duncan, Michelle C Barton
Mass cytometry utilizes antibodies conjugated with heavy metal labels, an approach that has greatly increased the number of parameters and opportunities for deep analysis well beyond what is possible with conventional fluorescence-based flow cytometry. As with any new technology, there are critical steps that help ensure the reliable generation of high-quality data. Presented here is an optimized protocol that incorporates multiple techniques for the processing of cell samples for mass cytometry analysis. The methods described here will help the user avoid common pitfalls and achieve consistent results by minimizing variability, which can lead to inaccurate data...
April 29, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28516997/peptide-and-antibody-ligands-for-renal-targeting-nanomedicine-strategies-for-kidney-disease
#18
Jonathan Wang, Jacqueline J Masehi-Lano, Eun Ji Chung
The kidney is one of the body's main filtration organs, and hence, opportunity exists for designing nanomedicine that can naturally accumulate in the kidneys for renal diseases. In addition to traditional physiochemical properties for kidney accumulation, such as size and charge, synthesized nanoparticles can be conjugated with targeting ligands which further home the nanocarriers to cell types of interest. In this review, we highlight key studies that have shown success in utilizing peptide- or antibody-based ligands in nanoparticles to target the glomerulus, podocytes, or renal tubule cells in the kidney...
May 18, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28516358/mechanistic-modeling-of-the-pharmacodynamic-and-pharmacokinetic-relationship-of-tissue-factor-pathway-inhibitor-neutralizing-antibody-bay-1093884-in-cynomolgus-monkeys
#19
Jian-Ming Gu, Xiao-Yan Zhao, Thomas Schwarz, Joachim Schuhmacher, Andreas Baumann, Elena Ho, Babu Subramanyan, Kathy Tran, Timothy Myles, Chandra Patel, Maria Koellnberger
BAY 1093884 is a fully human monoclonal antibody against the tissue factor pathway inhibitor (TFPI) in development as prophylaxis in patients with hemophilia with or without inhibitors. In vitro, BAY 1093884 binds to human, mouse, and monkey TFPI. The objective of this study was to find a pharmacodynamic (PD) biomarker after administration of BAY 1093884 to normal monkeys. In monkey plasma, BAY 1093884 exhibited an IC50 (concentration that inhibits 50%) of 4.65 and 6.19 nM for free TFPI and diluted prothrombin time (dPT), respectively...
May 17, 2017: AAPS Journal
https://www.readbyqxmd.com/read/28516165/host-and-pathogen-derived-adjuvant-coatings-on-protein-nanoparticle-vaccines
#20
Timothy Z Chang, Ishatou Diambou, Jong Rok Kim, Baozhong Wang, Julie A Champion
Nanoparticulate and molecular adjuvants have shown great efficacy in enhancing immune responses, and the immunogenic vaccines of the future will most likely contain both. To investigate the immunostimulatory effects of molecular adjuvants on nanoparticle vaccines, we have designed ovalbumin (OVA) protein nanoparticles coated with two different adjuvants-flagellin (FliC) and immunoglobulin M (IgM). These proteins, derived from Salmonella and mice, respectively, are representatives of pathogen- and host-derived molecules that can enhance immune responses...
March 2017: Bioengineering & Translational Medicine
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