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https://www.readbyqxmd.com/read/29328954/probing-the-stereoselective-interaction-of-ofloxacin-enantiomers-with-corresponding-monoclonal-antibodies-by-multiple-spectrometry
#1
Hongtao Mu, Zhenlin Xu, Yingju Liu, Yuanming Sun, Baoling Wang, Xiulan Sun, Zhanhui Wang, Sergei Eremin, Anatoly V Zherdev, Boris B Dzantiev, Hongtao Lei
Although stereoselective antibody has immense potential in chiral compounds detection and separation, the interaction traits between stereoselective antibody and the corresponding antigenic enantiomers are not yet fully exploited. In this study, the stereospecific interactions between ofloxacin isomers and corresponding monoclonal antibodies (McAb-WR1 and McAb-MS1) were investigated using time-resolved fluorescence, steady-state fluorescence, and circular dichroism (CD) spectroscopic methods. The chiral recognition discrepancies of antibodies with ofloxacin isomers were reflected through binding constant, number of binding sites, driving forces and conformational changes...
January 5, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29317163/investigations-into-the-efficacy-of-multi-component-cocaine-vaccines
#2
Atsushi Kimishima, Margaret E Olson, Kim D Janda
Although cocaine addiction remains a serious health and societal problem in the United States, no FDA-approved treatment has been developed. Vaccines offer an exciting strategy for the treatment of cocaine addiction; however, vaccine formulations need to be optimized to improve efficacy. Herein, we examine the effectiveness of a tricomponent cocaine vaccine, defined as having its hapten (GNE) and adjuvant (cytosine-guanine oligodeoxynucleotide 1826, CpG ODN 1826) covalently linked via the immunogenic protein ovalbumin (OVA)...
December 20, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29315532/treatment-of-mcpt8dtr-mice-with-high-or-low-dose-diphtheria-toxin-leads-to-differential-depletion-of-basophils-and-granulocyte-macrophage-progenitors
#3
Carole El Hachem, Pierre Hener, Peggy Kirstetter, Jiagui Li, Susan Chan, Mei Li
Basophils have been recently recognized to play important roles in type 2 immune responses during allergies and parasitic infection, largely due to the development of novel tools for the in vivo study of these cells. As such, the genetically-engineered MCPT8DTR mouse line has been used to specifically deplete basophils following treatment with diphtheria toxin (DT). In this study, we showed that DT-injected MCPT8DTR mice exhibited a striking decrease of eosinophils and neutrophils in skin when subjected to a hapten fluorescein isothiocyanate (FITC)-induced allergic contact dermatitis (ACD) experimental protocol...
January 8, 2018: European Journal of Immunology
https://www.readbyqxmd.com/read/29279017/development-of-an-immunochromatographic-assay-as-a-screen-for-detection-of-total-phthalate-acid-esters-in-cooking-oil
#4
Fan He, Yuanxin Tian, Zhenlin Xu, Lin Luo, Jinyi Yang, Hong Wang, Yuanming Sun, Qingfeng Du, Yudong Shen
Phthalate acid esters (PAEs) contamination raised concerns as a result of migration from food packaging and environmental exposure. Because of the adverse effects of PAE reported in humans, the aim of this study was to examine the ability to screen for the detection these chemicals as an indicator of potential exposure. Too develop a sensitive screening test to determine PAE, a specific polyclonal antibody against phthalic acid (PA), the hydrolysate of PAEs, was used as a marker of total PAEs. This method involved the use of 4-aminophthalic acid (APA) as an immunizing hapten to generate antibody...
December 26, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/29276691/lateral-flow-immunoassay-and-enzyme-linked-immunosorbent-assay-as-effective-immunomethods-for-the-detection-of-synthetic-cannabinoid-jwh-200-based-on-the-newly-synthesized-hapten
#5
Lucie Fojtíková, Anna Šuláková, Martina Blažková, Barbora Holubová, Martin Kuchař, Petra Mikšátková, Oldřich Lapčík, Ladislav Fukal
In recent years, the use of synthetic cannabinoids (SCs) as drugs of abuse has greatly increased. SCs are associated with a risk of severe poisoning or even death. Therefore, more rapid, cost effective and reliable methods are needed, especially for the screening of drivers after traffic accidents and for detailed toxicological analysis in forensic laboratories. In this study, we developed a lateral flow immunoassay (LFIA) and an enzyme linked immunosorbent assay (ELISA) for the detection of JWH-200 in oral fluids...
2018: Toxicology Reports
https://www.readbyqxmd.com/read/29236495/a-stable-heroin-analog-that-can-serve-as-a-vaccine-hapten-to-induce-antibodies-that-block-the-effects-of-heroin-and-its-metabolites-in-rodents-and-that-cross-react-immunologically-with-related-drugs-of-abuse
#6
Agnieszka Sulima, Rashmi Jalah, Joshua F G Antoline, Oscar B Torres, Gregory H Imler, Jeffrey R Deschamps, Zoltan Beck, Carl R Alving, Arthur E Jacobson, Kenner C Rice, Gary R Matyas
An improved synthesis of a haptenic heroin surrogate 1 (6-AmHap) is reported. The intermediate needed for the preparation of 1 was described in the route in the synthesis of 2 (DiAmHap). A scalable procedure was developed to install the C-3 amido group. Using the Boc protectng group in 18 allowed preparation of 1 in an overall yield of 53% from 4 and eliminated the necessity of preparing the diamide 13. Hapten 1 was conjugated to tetanus toxoid and mixed with liposomes containing monophosphoryl lipid A as an adjuvant...
December 13, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29233681/studies-on-the-development-of-antibodies-for-the-highly-hydrophobic-plasticizers-dinch-and-deht
#7
Stefanie Baldofski, Carsten Jörg Canitz, Leif-Alexander Garbe, Rudolf J Schneider
Diisononylcyclohexane-1,2-dicarboxylate (DINCH) and di-2-ethylhexyl terephthalate (DEHT), two of the most important substitutes for phthalate plasticizers, are used for a wide range of applications. Consequently, an increasing occurrence in urine and environmental samples is reported. Reliable and fast analytical methods for the quantification of these plasticizers are needed. So far, mainly GC-MS or LC-MS methods are used. We aimed to develop the first antibodies and immunoassays allowing for high-throughput analysis of samples...
December 9, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/29228007/conjugation-of-nitrated-acetaminophen-to-der-p1-amplifies-peripheral-blood-monocyte-response-to-der-p1
#8
Ryan G Thomas, Brenda M Rivera Reyes, Benjamin M Gaston, Nelki B Rivera Acosta, Ilya R Bederman, Laura A Smith, Morgan T Sutton, Benlian Wang, John F Hunt, Tracey L Bonfield
BACKGROUND: An association of acetaminophen use and asthma was observed in the International Study of Asthma and Allergies in Childhood study. However there are no clear mechanisms to explain an association between acetaminophen use and immunologic pathology. In acidic conditions like those in the stomach and inflamed airway, tyrosine residues are nitrated by nitrous and peroxynitrous acids. The resulting nitrotyrosine is structurally similar to 2,4-dinitrophenol and 2,4-dinitrochlorobenzene, known haptens that enhance immune responses by covalently binding proteins...
2017: PloS One
https://www.readbyqxmd.com/read/29222255/non-chemotherapy-drug-induced-neutropenia-key-points-to-manage-the-challenges
#9
REVIEW
Brian R Curtis
Non-chemotherapy idiosyncratic drug-induced neutropenia (IDIN) is a relatively rare but potentially fatal disorder that occurs in susceptible individuals, with an incidence of 2.4 to 15.4 cases per million population. Affected patients typically experience severe neutropenia within several weeks to several months after first exposure to a drug, and mortality is ∼5%. The drugs most frequently associated with IDIN include metamizole, clozapine, sulfasalazine, thiamazole, carbimazole, amoxicillin, cotrimoxazole, ticlopidine, and valganciclovir...
December 8, 2017: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/29199235/factors-influencing-the-appearance-of-oxaliplatin-induced-allergy
#10
Masayuki Nishihara, Kyoko Nishikura, Norimichi Morikawa, Shota Yokoyama
Several studies reported that the administration of oxaliplatin often induced allergy, but few studies have analyzed the pathogenesis. In this study, we examined the relationship between the incidence of allergy and status of oxaliplatin administration, patient background, laboratory data, or combined drugs. The subjects were 144 patients with colorectal or gastric cancer in whom oxaliplatin administration was started and completed between 2010 and 2016. They were divided into 2 groups: allergy and non-allergy groups...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29197801/in-contrast-to-morphine-buprenorphine-enhances-macrophage-induced-humoral-immunity-and-as-oxycodone-slightly-suppresses-the-effector-phase-of-cell-mediated-immune-response-in-mice
#11
Iwona Filipczak-Bryniarska, Katarzyna Nazimek, Bernadeta Nowak, Michael Kozlowski, Magdalena Wąsik, Krzysztof Bryniarski
BACKGROUND: Opioid receptors are commonly expressed on various immune cells, macrophages especially. Thus, these cells are prone to stimulation with opioids, which seems to be responsible for opioid-induced immunomodulatory effects. While morphine, fentanyl and methadone influence on mouse immune response was recently studied, little is known about the potential immunomodulatory impact of buprenorphine and oxycodone. AIM: The current research aimed to investigate the influence of buprenorphine and oxycodone on immune responses in mice under homeostatic conditions...
November 30, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29194657/a-proposal-to-create-an-extension-to-the-european-baseline-series
#12
Mark Wilkinson, Rosella Gallo, An Goossens, Jeanne D Johansen, Thomas Rustemeyer, Javier Sánchez-Pérez, Marie L Schuttelaar, Wolfgang Uter
BACKGROUND: The current European baseline series consists of 30 allergens, and was last updated in 2015. OBJECTIVES: To use data from the European Surveillance System on Contact Allergies (ESSCA) to propose an extension to the European baseline series in response to changes in environmental exposures. METHODS: Data from departmental and national extensions to the baseline series, together with some temporary additions from departments contributing to the ESSCA, were collated during 2013-2014...
December 1, 2017: Contact Dermatitis
https://www.readbyqxmd.com/read/29191418/anti-allergic-effects-of-novel-sulfated-polysaccharide-sacran-on-mouse-model-of-2-4-dinitro-1-fluorobenzene-induced-atopic-dermatitis
#13
Keiichi Motoyama, Yuki Tanida, Aiko Sakai, Taishi Higashi, Shinichiro Kaneko, Hidetoshi Arima
In this study, in order to investigate the potential of the novel polysaccharide sacran from Aphanothece Sacrum for development of atopic dermatitis (AD), we evaluated the potential of pretreatment with topical sacran to prevent the development of hapten (dinitrofluorobenzene: DNFB)-induced AD-like disease in mice. In the AD model mice, sacran markedly ameliorated AD symptoms such as scratching behavior and edema in ear. In addition, sacran significantly increased water content of the stratum corneum which regulates the skin barrier function...
November 27, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29168189/imaging-mass-spectrometry-for-novel-insights-into-contact-allergy%C3%A2-%C3%A2-a-proof-of-concept-study-on-nickel
#14
Per Malmberg, Thomas Guttenberg, Marica B Ericson, Lina Hagvall
BACKGROUND: In spite of extensive regulation to limit exposure, nickel remains the main cause of contact allergy in the general population. More detailed knowledge on the skin uptake of haptens is required. So far, no method exists for the visualization of clinically relevant haptens and their distribution in the skin. OBJECTIVES: To show, in terms of a proof of concept, that imaging mass spectrometry [time of flight secondary ion mass spectrometry (ToF-SIMS)] can be applied for investigation of the penetration and distribution of nickel in human skin...
November 23, 2017: Contact Dermatitis
https://www.readbyqxmd.com/read/29167641/%C3%AE-7-nicotinic-agonist-ar-r17779-protects-mice-against-2-4-6-trinitrobenzene-sulfonic-acid-induced-colitis-in-a-spleen-dependent-way
#15
Andrea Grandi, Irene Zini, Lisa Flammini, Anna M Cantoni, Valentina Vivo, Vigilio Ballabeni, Elisabetta Barocelli, Simona Bertoni
The existence of a cholinergic anti-inflammatory pathway negatively modulating the inflammatory and immune responses in various clinical conditions and experimental models has long been postulated. In particular, the protective involvement of the vagus nerve and of nicotinic Ach receptors (nAChRs) has been proposed in intestinal inflammation and repeatedly investigated in DSS- and TNBS-induced colitis. However, the role of α7 nAChRs stimulation is still controversial and the potential contribution of α4β2 nAChRs has never been explored in this experimental condition...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29164596/regulation-of-t-helper-cell-responses-during-antigen-presentation-by-norepinephrine-exposed-endothelial-cells
#16
Linghui Xu, Wanhong Ding, Lori L Stohl, Xi K Zhou, Shayan Azizi, Ethan Chuang, Jimmy Lam, John A Wagner, Richard D Granstein
Dermal blood vessels and regional lymph nodes are innervated by sympathetic nerves and, under stress, sympathetic nerves release norepinephrine (NE). Exposure of primary murine dermal microvascular endothelial cells (pDMECs) to NE followed by co-culture with Langerhans cells (LCs), responsive CD4+ T cells and antigen resulted in modulation of CD4+ T cell responses. NE-treatment of pDMECs induced increased production of interleukin (IL)-6 and IL-17A while downregulating interferon (IFN)-γ and IL-22 release...
November 21, 2017: Immunology
https://www.readbyqxmd.com/read/29149704/gold-nanoparticles-as-an-adjuvant-influence-of-size-shape-and-technique-of-combination-with-cpg-on-antibody-production
#17
Lev A Dykman, Sergey A Staroverov, Alexander S Fomin, Vitaly A Khanadeev, Boris N Khlebtsov, Vladimir A Bogatyrev
Gold nanoparticles (GNPs) are advantageous as an adjuvant in the design of effective vaccines and in the preparation of high-affinity antibodies to haptens and complete antigens. Another method of activating immunocompetent cells with colloidal gold is to conjugate GNPs with CpG oligodeoxynucleotides (ODNs). We examined how the size and shape of GNPs and various combinations of GNPs and CpG ODNs 1826 affect the immune response. When animals were injected with a model antigen (BSA) coupled to gold nanospheres (diameters, 15 and 50nm), nanorods, nanoshells, and nanostars, the titers of the resultant antibodies differed substantially...
November 14, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29148816/assessment-of-anti-piperacillin-igg-binding-to-structurally-related-drug-protein-adducts
#18
Mohammed Amali, Rosalind Jenkins, Xioali Meng, Lee Faulkner, Paul Whitaker, Daniel Peckham, B Kevin Park, Dean John Naisbitt
The risk of developing hypersensitivity to alternative antibiotics is a concern for penicillin hypersensitive patients and healthcare pro-viders. Herein we use piperacillin hypersensitivity as a model to explore the reactivity of drug-specific IgG against alternative β-lactam protein adducts. Mass spectrometry was used to show the drugs (amoxicillin, flucloxacillin, benzyl penicillin, aztreonam and pipera-cillin) bind to similar lysine residues on the protein carrier bovine serum albumin. However, the hapten-specific IgG antibodies found in piperacillin hypersensitive patient plasma did not bind to other β-lactam protein conjugates...
November 17, 2017: Chemical Research in Toxicology
https://www.readbyqxmd.com/read/29147504/immuno-targeting-of-staphylococcus-aureus-via-surface-remodeling-complexes
#19
Mary J Sabulski, Sean E Pidgeon, Marcos M Pires
Agents with novel mechanisms of action are needed to complement traditional antibiotics. Towards these goals, we have exploited the surface-homing properties of vancomycin to tag the surface of Gram-positive pathogens with immune cell attractants in two unique modes. First, vancomycin was conjugated to the small molecule hapten 2,4-dinitrophenol (DNP) to promote bacterial opsonization. Second, we built on these results by improving the tagging specificity and mechanism of incorporation by coupling it to a sortase A substrate peptide...
October 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/29132974/topical-electrophilic-nitro-fatty-acids-potentiate-cutaneous-inflammation
#20
Alicia R Mathers, Cara D Carey, Meaghan E Killeen, Sonia R Salvatore, Laura K Ferris, Bruce A Freeman, Francisco J Schopfer, Louis D Falo
Endogenous electrophilic fatty acids mediate anti-inflammatory responses by modulating metabolic and inflammatory signal transduction and gene expression. Nitro-fatty acids and other electrophilic fatty acids may thus be useful for the prevention and treatment of immune-mediated diseases, including inflammatory skin disorders. In this regard, subcutaneous (SC) injections of nitro oleic acid (OA-NO2), an exemplary nitro-fatty acid, inhibit skin inflammation in a model of allergic contact dermatitis (ACD). Given the nitration of unsaturated fatty acids during metabolic and inflammatory processes and the growing use of fatty acids in topical formulations, we sought to further study the effect of nitro-fatty acids on cutaneous inflammation...
November 10, 2017: Free Radical Biology & Medicine
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