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Monoclonal antibodie

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https://www.readbyqxmd.com/read/28938590/ocular-toxicities-associated-with-targeted-anticancer-agents-an-analysis-of-clinical-data-with-management-suggestions
#1
Chen Fu, Dan S Gombos, Jared Lee, Goldy C George, Kenneth Hess, Andrew Whyte, David S Hong
Ocular toxicities are among the most common adverse events resulting from targeted anticancer agents and are becoming increasingly relevant in the management of patients on these agents. The purpose of this study is to provide a framework for management of these challenging toxicities based on objective data from FDA labels and from analysis of the literature. All oncologic drugs approved by the FDA up to March 14, 2015, were screened for inclusion. A total of 16 drugs (12 small-molecule drugs and 4 monoclonal antibodies) were analyzed for ocular toxicity profiles based on evidence of ocular toxicity...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938559/doxorubicin-loaded-platelets-conjugated-with-anti-cd22-mabs-a-novel-targeted-delivery-system-for-lymphoma-treatment-with-cardiopulmonary-avoidance
#2
Peipei Xu, Huaqin Zuo, Rongfu Zhou, Fan Wang, Xu Liu, Jian Ouyang, Bing Chen
B-cell lymphoma accounts for approximately 85% of all adult non-Hodgkin's lymphoma cases. Doxorubicin (DOX) is an indispensable drug for the treatment of non-Hodgkin's lymphoma. However, DOX causes severe cardiotoxicity, which limits its use in conventional treatment strategies. In this study, we developed a novel drug delivery system for lymphoma treatment: DOX-loaded platelets that were conjugated with anti-CD22 monoclonal antibodies (mAbs) (DOX-platelet-CD22). Platelets are bio- and immune-compatible drug carriers that can prolong the circulation time of drugs...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938451/antibody-mediated-targeting-of-the-fgfr1c-isoform-increases-glucose-uptake-in-white-and-brown-adipose-tissue-in-male-mice
#3
Jo E Lewis, Ricardo J Samms, Scott Cooper, Jeni C Luckett, Alan C Perkins, James D Dunbar, Dennis P Smith, Paul J Emmerson, Andrew C Adams, Francis J P Ebling, Kostas Tsintzas
The increased prevalence of obesity and its cardiometabolic implications demonstrates the imperative to identify novel therapeutic targets able to effect meaningful metabolic changes in this population. Antibody-mediated targeting of fibroblast growth factor receptor 1c isoform (FGFR1c) has been shown to ameliorate hyperglycaemia and protect from diet- and genetically-induced obesity in rodents and non-human primates. However, it is currently unknown which tissue(s) contribute to this glucose lowering effect...
August 16, 2017: Endocrinology
https://www.readbyqxmd.com/read/28938115/a-human-bi-specific-antibody-against-zika-virus-with-high-therapeutic-potential
#4
Jiaqi Wang, Marco Bardelli, Diego A Espinosa, Mattia Pedotti, Thiam-Seng Ng, Siro Bianchi, Luca Simonelli, Elisa X Y Lim, Mathilde Foglierini, Fabrizia Zatta, Stefano Jaconi, Martina Beltramello, Elisabetta Cameroni, Guntur Fibriansah, Jian Shi, Taylor Barca, Isabel Pagani, Alicia Rubio, Vania Broccoli, Elisa Vicenzi, Victoria Graham, Steven Pullan, Stuart Dowall, Roger Hewson, Simon Jurt, Oliver Zerbe, Karin Stettler, Antonio Lanzavecchia, Federica Sallusto, Andrea Cavalli, Eva Harris, Shee-Mei Lok, Luca Varani, Davide Corti
Zika virus (ZIKV), a mosquito-borne flavivirus, causes devastating congenital birth defects. We isolated a human monoclonal antibody (mAb), ZKA190, that potently cross-neutralizes multi-lineage ZIKV strains. ZKA190 is highly effective in vivo in preventing morbidity and mortality of ZIKV-infected mice. NMR and cryo-electron microscopy show its binding to an exposed epitope on DIII of the E protein. ZKA190 Fab binds all 180 E protein copies, altering the virus quaternary arrangement and surface curvature...
September 21, 2017: Cell
https://www.readbyqxmd.com/read/28938025/the-kaposi-s-sarcoma-associated-herpesvirus-kshv-non-structural-membrane-protein-k15-is-required-for-viral-lytic-replication-and-may-represent-a-therapeutic-target
#5
Bizunesh Abere, Tamrat M Mamo, Silke Hartmann, Naira Samarina, Elias Hage, Jessica Rückert, Sven-Kevin Hotop, Guntram Büsche, Thomas F Schulz
Kaposi's sarcoma-associated herpesvirus (KSHV) is the infectious cause of the highly vascularized tumor Kaposi's sarcoma (KS), which is characterized by proliferating spindle cells of endothelial origin, extensive neo-angiogenesis and inflammatory infiltrates. The KSHV K15 protein contributes to the angiogenic and invasive properties of KSHV-infected endothelial cells. Here, we asked whether K15 could also play a role in KSHV lytic replication. Deletion of the K15 gene from the viral genome or its depletion by siRNA lead to reduced virus reactivation, as evidenced by the decreased expression levels of KSHV lytic proteins RTA, K-bZIP, ORF 45 and K8...
September 22, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28937963/ki67-and-lymphocytes-in-the-pretherapeutic-core-biopsy-of-primary-invasive-breast-cancer-positive-markers-of-therapy-response-prediction-and-superior-survival
#6
REVIEW
Claus M Schlotter, Lothar Tietze, Ulf Vogt, Carlos Villena Heinsen, Antje Hahn
Background Core needle biopsy plays a crucial role as diagnostic tool for BC. Both Ki67 and likely tumor-infiltrating lymphocytes (TILs) in the near future are determining the kind of systemic therapy. The role of TILs in BC is still an issue for clinical research, albeit preliminary results of neoadjuvant and adjuvant clinical studies already now highlight the crucial impact of TILs on therapy response and survival. Methods Evaluation of related publications (pubmed) and meeting abstracts (ASCO, SABCS). Results The monoclonal antibody Ki67 recognizing a nuclear antigene in proliferating cells is a positive marker of therapy response and superior survival...
September 22, 2017: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/28937210/multivariate-analysis-of-2d-1-h-13-c-methyl-nmr-spectra-of-monoclonal-antibody-therapeutics-to-facilitate-assessment-of-higher-order-structure
#7
Luke Arbogast, Frank Delaglio, John E Schiel, John P Marino
Two-dimensional (2D) 1H-13C methyl NMR provides a powerful tool to probe the higher order structure (HOS) of monoclonal antibodies (mAbs), since spectra can readily be acquired on intact mAbs at natural isotopic abundance, and small changes in chemical environment and structure give rise to observable changes in corresponding spectra, which can be interpreted at atomic resolution. This makes it possible to apply 2D NMR spectral fingerprinting approaches directly to drug products in order to systematically characterize structure and excipient effects...
September 22, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28936339/utility-of-vs38c-in-the-diagnostic-and-prognostic-assessment-of-osteosarcoma-and-other-bone-tumours-tumour-like-lesions
#8
E S Hookway, Z Orosz, Y Uchihara, A Grigoriadis, A B Hassan, U Oppermann, N A Athanasou
BACKGROUND: VS38c is a monoclonal antibody that recognises a rough endoplasmic reticulum (rER) intracellular antigen termed cytoskeleton-linking membrane protein 63. rER is typically found in viable tumour cells and is abundant in osteosarcoma cells. The aim of this study was to determine the diagnostic and prognostic utility of VS38c in the histological assessment of osteosarcoma and other bone tumours/tumour-like leisons. METHODS: Immunohistochemical staining with VS38c was carried out on formalin-fixed specimens of osteosarcoma (pre/post-chemotherapy) and a wide range of benign and malignant bone lesions...
2017: Clinical Sarcoma Research
https://www.readbyqxmd.com/read/28935938/an-engineered-bispecific-dna-encoded-igg-antibody-protects-against-pseudomonas-aeruginosa-in-a-pneumonia-challenge-model
#9
Ami Patel, Antonio DiGiandomenico, Ashley E Keller, Trevor R F Smith, Daniel H Park, Stephanie Ramos, Katherine Schultheis, Sarah T C Elliott, Janess Mendoza, Kate E Broderick, Megan C Wise, Jian Yan, Jingjing Jiang, Seleeke Flingai, Amir S Khan, Kar Muthumani, Laurent Humeau, Lily I Cheng, Leslie Wachter-Rosati, C Kendall Stover, Niranjan Y Sardesai, David B Weiner
The impact of broad-spectrum antibiotics on antimicrobial resistance and disruption of the beneficial microbiome compels the urgent investigation of bacteria-specific approaches such as antibody-based strategies. Among these, DNA-delivered monoclonal antibodies (DMAbs), produced by muscle cells in vivo, potentially allow the prevention or treatment of bacterial infections circumventing some of the hurdles of protein IgG delivery. Here, we optimize DNA-delivered monoclonal antibodies consisting of two potent human IgG clones, including a non-natural bispecific IgG1 candidate, targeting Pseudomonas aeruginosa...
September 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28935894/strain-dependent-neutralization-reveals-antigenic-variation-of-human-parechovirus-3
#10
Eveliina Karelehto, Sabine van der Sanden, James A Geraets, Aušra Domanska, Lonneke van der Linden, Dionne Hoogendoorn, Gerrit Koen, Hetty van Eijk, Shabih Shakeel, Tim Beaumont, Menno de Jong, Dasja Pajkrt, Sarah J Butcher, Katja C Wolthers
Human parechovirus 3 (HPeV3), a member of the Picornavirus family, is frequently detected worldwide. However, the observed seropositivity rates for HPeV3 neutralizing antibodies (nAbs) vary from high in Japan to low in the Netherlands and Finland. To study if this can be explained by technical differences or antigenic diversity among HPeV3 strains included in the serological studies, we determined the neutralizing activity of Japanese and Dutch intravenous immunoglobulin batches (IVIG), a rabbit HPeV3 hyperimmune polyclonal serum, and a human HPeV3-specific monoclonal antibody (mAb) AT12-015, against the HPeV3 A308/99 prototype strain and clinical isolates from Japan, the Netherlands and Australia, collected between 1989 and 2015...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28935113/directed-evolution-of-glycopeptides-using-mrna-display
#11
Satoru Horiya, Jennifer K Bailey, Isaac J Krauss
Directed evolution is a useful method for the discovery of nucleic acids, peptides, or proteins that have desired binding abilities or functions. Because of the abundance and importance of glycosylation in nature, directed evolution of glycopeptides and glycoproteins is also highly desirable. However, common directed evolution platforms such as phage-, yeast-, or mammalian-cell display are limited for these applications by several factors. Glycan structure at each glycosylation site is not genetically encoded, and yeast and mammalian cells produce a heterogeneous mixture of glycoforms at each site on the protein...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28935106/chemoenzymatic-glycan-remodeling-of-natural-and-recombinant-glycoproteins
#12
Qiang Yang, Lai-Xi Wang
N-glycosylation plays important roles in modulating the biological functions of glycoproteins, such as protein folding, stability, and immunogenicity. However, acquiring homogeneous glycoforms of glycoproteins has been a challenging task for functional studies and therapeutic applications. In this chapter, we describe an efficient chemoenzymatic glycan remodeling protocol for making homogeneous glycoproteins that involves enzymatic deglycosylation and subsequent reglycosylation procedures. Two therapeutic glycoproteins, Herceptin (trastuzumab, a therapeutic monoclonal antibody) and erythropoietin (EPO, a glycoprotein hormone), were chosen as the model systems...
2017: Methods in Enzymology
https://www.readbyqxmd.com/read/28934434/high-sensitivity-assays-for-plasmodium-falciparum-infection-by-immuno-polymerase-chain-reaction-detection-of-pfideh-and-pfldh-antigens
#13
Jianbing Mu, John F Andersen, Jesus G Valenzuela, Thomas E Wellems
Background: Rapid diagnostic tests based on Plasmodium falciparum histidine-rich protein II (PfHRP-II) and P. falciparum lactate dehydrogenase (PfLDH) antigens are widely deployed for detection of P. falciparum infection; however, these tests often miss cases of low-level parasitemia, and PfHRP-II tests can give false-negative results when P. falciparum strains do not express this antigen. Methods: We screened proteomic data for highly expressed P. falciparum proteins and compared their features to those of PfHRP-II and PfLDH biomarkers...
September 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28934410/approach-to-cardio-oncologic-patients-with-special-focus-on-patients-with-cardiac-implantable-electronic-devices-planned-for-radiotherapy-results-of-the-european-heart-rhythm-association-survey
#14
Radoslaw Lenarczyk, Tatjana S Potpara, Kristina H Haugaa, Jean-Claude Deharo, Antonio Hernandez-Madrid, Maria Del Carmen Exposito Pineda, Marek Kiliszek, Nikolaos Dagres
The aim of this European Heart Rhythm Association (EHRA) survey was to evaluate clinical practice regarding cardio-oncologic patients, with special focus on patients with cardiac implantable electronic devices (CIEDs) planned for anticancer radiotherapy (RT), among members of the EHRA electrophysiology research network. Of the 36 responding centres, 89% managed patients who were diagnosed or treated oncologically, and this diagnosis affected 1-5% of cardiovascular patients in majority of centres (57%). The main side effects of anticancer therapy in patients treated by cardiologists were thromboembolic complications and left ventricular dysfunction (both reported as 'frequent' by 43% of the centres)...
September 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28934246/discovery-of-pf-06928215-as-a-high-affinity-inhibitor-of-cgas-enabled-by-a-novel-fluorescence-polarization-assay
#15
Justin Hall, Amy Brault, Fabien Vincent, Shawn Weng, Hong Wang, Darren Dumlao, Ann Aulabaugh, Dikran Aivazian, Dana Castro, Ming Chen, Jeffrey Culp, Ken Dower, Joseph Gardner, Steven Hawrylik, Douglas Golenbock, David Hepworth, Mark Horn, Lyn Jones, Peter Jones, Eicke Latz, Jing Li, Lih-Ling Lin, Wen Lin, David Lin, Frank Lovering, Nootaree Niljanskul, Ryan Nistler, Betsy Pierce, Olga Plotnikova, Daniel Schmitt, Suman Shanker, James Smith, William Snyder, Timothy Subashi, John Trujillo, Edyta Tyminski, Guoxing Wang, Jimson Wong, Bruce Lefker, Leslie Dakin, Karen Leach
Cyclic GMP-AMP synthase (cGAS) initiates the innate immune system in response to cytosolic dsDNA. After binding and activation from dsDNA, cGAS uses ATP and GTP to synthesize 2', 3' -cGAMP (cGAMP), a cyclic dinucleotide second messenger with mixed 2'-5' and 3'-5' phosphodiester bonds. Inappropriate stimulation of cGAS has been implicated in autoimmune disease such as systemic lupus erythematosus, thus inhibition of cGAS may be of therapeutic benefit in some diseases; however, the size and polarity of the cGAS active site makes it a challenging target for the development of conventional substrate-competitive inhibitors...
2017: PloS One
https://www.readbyqxmd.com/read/28934199/mucosal-leishmaniasis-mimicking-t-cell-lymphoma-in-a-patient-receiving-monoclonal-antibody-against-tnf%C3%AE
#16
Antonio Carlos Nicodemo, Daniel Fernandes Duailibi, Diego Feriani, Maria Irma Seixas Duarte, Valdir Sabbaga Amato
No abstract text is available yet for this article.
September 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28933731/a-novel-fluoroimmunoassay-for-detecting-ruscogenin-with-monoclonal-antibodies-conjugated-with-cdse-zns-quantum-dots
#17
Hongwei Zhang, Tao Xu, Lan Gao, Xiufeng Liu, Jihua Liu, Boyang Yu
Ruscogenin (RUS) is a steroidal sapogenin found in Ruscus aculeatus and Ophiopogon japonicus with several pharmacological activities. In the work reported herein, a novel method termed competitive fluorescence-linked immunosorbent assay (cFLISA) based on monoclonal antibodies (mAbs) coupled with quantum dots (QDs) was developed for the quick and sensitive determination of RUS in biological samples. The mAbs against RUS were conjugated with CdSe/ZnS QDs by the crossing-linking reagents and an indirect cFLISA method was developed...
July 26, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28933661/suppressing-allostery-in-epitope-mapping-experiments-using-millisecond-hydrogen-deuterium-exchange-mass-spectrometry
#18
Bin Deng, Shaolong Zhu, Andrew M Macklin, Jianrong Xu, Cristina Lento, Adnan Sljoka, Derek J Wilson
Localization of the interface between the candidate antibody and its antigen target, commonly known as epitope mapping, is a critical component of the development of therapeutic monoclonal antibodies. With the recent availability of commercial automated systems, hydrogen / deuterium eXchange (HDX) is rapidly becoming the tool for mapping epitopes preferred by researchers in both industry and academia. However, this approach has a significant drawback in that it can be confounded by 'allosteric' structural and dynamic changes that result from the interaction, but occur far from the point(s) of contact...
September 21, 2017: MAbs
https://www.readbyqxmd.com/read/28933644/development-and-optimization-of-a-sensitive-pseudovirus-based-assay-for-hiv-1-neutralizing-antibodies-detection-using-a3r5-cells
#19
Qingqing Chen, Jianhui Nie, Weijin Huang, Yanmei Jiao, Lan Li, Tong Zhang, Juan Zhao, Hao Wu, Youchun Wang
Sensitive assays for HIV-1 neutralizing antibody detection are urgently needed for vaccine immunogen optimization and identification of protective immune response levels. In this study, we developed an easy-to-use HIV-1 pseudovirus neutralization assay based on a human CD4(+) lymphoblastoid cell line A3R5 by employing a high efficient pseudovirus production system. Optimal conditions for cell counts, infection time, virus dose and concentration of DEAE-dextran were tested and identified. For T-cell line-adapted tier 1 virus strains, significantly higher inhibitory efficiency was observed for both monoclonal neutralizing antibody (4 fold) and plasma (2 fold) samples in A3R5 than those in TZM-bl assay...
September 21, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28933642/epitope-characterization-of-anti-jam-a-antibodies-using-orthogonal-mass-spectrometry-and-surface-plasmon-resonance-approaches
#20
Guillaume Terral, Thierry Champion, François Debaene, Olivier Colas, Maxime Bourguet, Elsa Wagner-Rousset, Nathalie Corvaia, Alain Beck, Sarah Cianferani
Junctional adhesion molecule-A (JAM-A) is an adherens and tight junction protein expressed by endothelial and epithelial cells and associated with cancer progression. We present here the extensive characterization of immune complexes involving JAM-A antigen and three monoclonal antibodies (mAbs), including hz6F4-2, a humanized version of anti-tumoral 6F4 mAb identified by a functional and proteomic approach in our laboratory. A specific workflow that combines orthogonal approaches has been designed to determine binding stoichiometries along with JAM-A epitope mapping determination at high resolution for these three mAbs...
September 21, 2017: MAbs
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