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https://www.readbyqxmd.com/read/29231858/anti-allergic-activity-of-monoacylated-ascorbic-acid-2-glucosides
#1
Kaori Miura, Yuta Morishita, Hiroaki Matsuno, Yusuke Aota, Hideyuki Ito, Akihiro Tai
2-O-α-d-Glucopyranosyl-l-ascorbic acid (AA-2G) is one of the stable ascorbic acid (AA) derivatives known as provitamin C agents. We have previously synthesized two types of monoacylated derivatives of AA-2G, 6-O-acyl-2-O-α-d-glucopyranosyl-l-ascorbic acids having a straight-acyl chain of varying length from C₄ to C18 (6-sAcyl-AA-2G) and a branched-acyl chain of varying length from C₆ to C16 (6-bAcyl-AA-2G) in order to improve the bioavailability of AA-2G. In this study, 6-sAcyl-AA-2G and 6-bAcyl-AA-2G per se showed the inhibitory effects on hyaluronidase activity and degranulation...
December 12, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29230430/triethylene-glycol-dimethacrylate-adjuvant-properties-and-effect-on-cytokine-production
#2
Sara Alizadehgharib, Anna-Karin Östberg, Ulf Dahlgren
Objective: Leakage of monomers from dental fillings due to incomplete curing is very common. The objective of the present study was to examine the cytokine profile in cells exposed to triethyleneglycol dimethacrylate (TEGDMA) and the adjuvant properties of TEGDMA. Materials and methods: Human peripheral blood mononuclear cells were exposed to TEGDMA (500 and 1000 μM) for 24 h in vitro. Bio-Plex Pro™ assays were used for analysis and detection of cytokines. In vivo, BALB/c mice were immunized subcutaneously in the base of the tail with TEGDMA in combination with ovalbumin (OVA)...
2018: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/29229094/no-genetic-association-detected-with-mepolizumab-efficacy-in-severe-asthma
#3
Lynn Condreay, Mathias Chiano, Hector Ortega, Natalie Buchan, Elizabeth Harris, Eugene R Bleecker, Philip J Thompson, Marc Humbert, Peter Gibson, Steven Yancey, Soumitra Ghosh
BACKGROUND AND OBJECTIVES: Treatment with mepolizumab, a humanized monoclonal antibody to interleukin-5, reduces the rate of asthma exacerbations and the requirement for systemic glucocorticoids while maintaining asthma control. Treatment decisions are guided by predictors of response, including blood eosinophil thresholds in patients with frequent exacerbations despite intensive anti-inflammatory and controller treatment. Identification of additional predictors of response could aid treatment decisions...
November 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/29225189/luteolin-attenuates-airway-inflammation-by-inducing-the-transition-of-cd4-cd25-to-cd4-cd25-regulatory-t-cells
#4
Seung-Hyung Kim, Evelyn Saba, Bok-Kyu Kim, Won-Kyung Yang, Yang-Chun Park, Han Jae Shin, Chang Kyun Han, Young Cheol Lee, Man Hee Rhee
Regulatory T cells (Th2) play an important role in autoimmunity and have been shown to exert anti-inflammatory effects in allergic asthma. Mouse model of airway inflammation was used to examine the suppressive activity of luteolin-induced CD4+CD25+ regulatory T cells (Tregs) in vivo. In this study, BALB/c mice were sensitized with ovalbumin antigen (OVA) by aerosol challenge. Then, various biological processes were examined, including airway eosinophilia; mucus hypersecretion; elevation of OVA-specific IgE, expression of Th2 cytokines and chemokine levels; expression of eotaxin 2 and CCR3; and airway hyper responsiveness (AHR)...
December 7, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29225187/prostaglandin-d2-generation-from-human-lung-mast-cells-is-catalysed-exclusively-by-cyclooxygenase-1
#5
Bandar K Baothman, Jennifer Smith, Linda J Kay, S Kim Suvarna, Peter T Peachell
Mast cells are an exceptionally rich source of prostaglandin D2 (PGD2). PGD2 is pro-inflammatory and can cause bronchoconstriction. The enzyme cyclooxygenase (COX) is central to the generation of prostanoids such as PGD2. Non-steroidal anti-inflammatory drugs (NSAIDs) inhibit COX. COX exists as two isoforms, COX-1 and COX-2. The principal aim of this study was to establish whether COX-1 and/or COX-2 mediates PGD2 generation from human lung mast cells. Mast cells were isolated from human lung tissue and purified by flotation over Percoll and immunomagnetic bead separations...
December 7, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29214527/assessment-of-the-diagnostic-value-of-specific-anti-toxocara-iga-in-slovakian-patients-suspected-to-have-toxocarosis
#6
Vojtech Boldiš, František Ondriska, Simona Lipková
Human toxocarosis is one of the most widespread and prevalent helminthic zoonosis in many countries, including Slovakia. The aim was to evaluate the usefulness of IgA anti-Toxocara antibody detection in the serodiagnosis of toxocarosis. The levels of specific IgA antibodies were determined by excretory-secretory (ES)-enzyme-linked immunosorbent assay (ELISA). The IgA seropositivity in IgG anti-Toxocara seropositive patients (n = 52) was 32.7% and found to be highest in the oldest age groups (P = 0.026)...
December 6, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/29213221/omalizumab-in-children-with-severe-allergic-asthma-the-italian-real-life-experience
#7
Amelia Licari, Riccardo Castagnoli, Chiara Denicolò, Linda Rossini, Manuela Seminara, Lucia Sacchi, Giorgia Testa, Mara De Amici, Gian Luigi Marseglia
Background: Anti-IgE treatment represents a major breakthrough in the therapeutic management of severe allergic asthma. To date, omalizumab is the only biological drug currently licensed as add-on therapy in children aged > 6 years with moderate-to-severe and severe allergic asthma uncontrolled after treatment with high dose of inhaled corticosteroids plus long-acting inhaled beta2-agonist. The clinical efficacy and safety of omalizumab treatment in the pediatric population has been extensively documented in specific trials and consistently expanded from real-life studies...
March 2017: Current Respiratory Medicine Reviews
https://www.readbyqxmd.com/read/29211611/pregnancy-associated-plasma-protein-a-papp-a-levels-in-patients-with-severe-allergic-asthma-are-reduced-by-omalizumab
#8
Ismet Bulut, Zeynep F Ozseker, Abdurrahman Coskun, Mustafa Serteser, Ibrahim Unsal
BACKGROUND: Remodeling is a crucial feature of severe asthma and may be associated with activation of the allergic cascade by immunoglobulin E (IgE). Omalizumab, an anti-IgE monoclonal antibody, effectively targets the severe allergic asthma phenotype. Pregnancy-associated plasma protein-A (PAPP-A) is an insulin-like growth factor binding protein-4 (IGFBP-4) protease, increasing local insulin-like growth factor (IGF)-1 concentrations, which in turn initiating a cascade involved in the regulation of cell growth, differentiation, and proliferation in various tissues...
December 6, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/29210121/proanthocyanidin-rich-pinus-radiata-bark-extract-inhibits-mast-cell-mediated-anaphylaxis-like-reactions
#9
Yun Ho Choi, Chang Ho Song, Sung Phil Mun
Mast cells play a critical role in the effector phase of immediate hypersensitivity and allergic reactions. Pinus radiata bark extract exerts multiple biological effects and exhibits immunomodulatory and antioxidant properties. However, its role in mast cell-mediated anaphylactic reactions has not been thoroughly investigated. In this study, we examined the effects of proanthocyanidin-rich water extract (PAWE) isolated from P. radiata bark on compound 48/80-induced or antidinitrophenyl (DNP) immunoglobulin E (IgE)-mediated anaphylaxis-like reactions in vivo...
December 6, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29208545/il-24-is-a-common-and-specific-autoantigen-of-ige-in-chronic-spontaneous-urticaria
#10
Oliver Schmetzer, Elisa Lakin, Fatih A Topal, Patricia Preusse, Denise Freier, Martin K Church, Marcus Maurer
BACKGROUND: The efficacy of omalizumab (anti-IgE) and elevated IgE levels in chronic spontaneous urticaria (CSU) suggest autoallergic mechanisms. OBJECTIVE: To identify autoallergic targets of IgE in CSU patients. METHODS: Sera of CSU patients together with idiopathic anaphylaxis patients and healthy controls (seven of each) were screened for IgE-autoantibodies using an array of >9,000 proteins. Sera of 1062 CSU patients and 482 healthy controls were used in an IgE-anti-Interleukin-24 (IL-24) specific ELISA to investigate the association of IgE-anti-IL-24 and CSU...
December 2, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29206209/dioscorea-quinqueloba-ameliorates-oxazolone-and-2-4-dinitrochlorobenzene-induced-atopic-dermatitis-symptoms-in-murine-models
#11
Jonghwan Jegal, No-June Park, Sim-Kyu Bong, Hyun Jegal, Su-Nam Kim, Min Hye Yang
Dioscorea quinqueloba has been used for food substances, as well as in herbal medicines for allergic diseases such as asthma. This study aimed to investigate the anti-atopic dermatitis (AD) effects of the total extract of D. quinqueloba rhizomes and active fractionson murine oxazolone- and 2,4-dinitrochlorobenzene-induced models of AD. Specific AD symptoms, such as erythema, ear swelling, and epidermis thickening, were significantly reduced in the oxazolone-mediated AD BALB/c mice upon topical application of D...
December 5, 2017: Nutrients
https://www.readbyqxmd.com/read/29200667/davallia-mariesii-moore-improves-fc%C3%AE%C2%B5ri-mediated-allergic-responses-in-the-rat-basophilic-leukemia-mast-cell-line-rbl-2h3-and-passive-cutaneous-anaphylaxis-in-mice
#12
Hyun Ju Do, Tae Woo Oh, Ju Hye Yang, Kwang Il Park, Jin Yeul Ma
Davallia mariesii Moore (Drynaria rhizome extract (DRE)) is widely known for its efficacy in treating inflammation, arteriosclerosis, and bone injuries. This study evaluated whether treatment with DRE inhibited FcɛRI-mediated allergic responses in the RBL-2H3 mast cells and investigated the early- and late-phase mechanisms by which DRE exerts its antiallergic effects. IgE anti-DNP/DNP-HSA-sensitized RBL-2H3 mast cells were tested for cytotoxicity to DRE, followed by the assessment of β-hexosaminidase release...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/29199960/update-on-the-genetic-basis-of-drug-hypersensitivity-reactions
#13
REVIEW
R Jurado-Escobar, J R Perkins, E García-Martín, M Isidoro-García, I Doña, M J Torres, J A Cornejo-García
Drug hypersensitivity reactions (DHRs) are unpredictable, complex responses to medicines in predisposed individuals. They represent a major health problem owing to the number of patients affected and the severity of the clinical conditions they can induce. In addition to environmental factors, the underlying mechanisms of DHRs are also influenced by genetic factors, although considerable gaps remain in our knowledge. Therefore, further study of the genetics of DHRs is necessary to shed light on their underlying mechanisms...
2017: Journal of Investigational Allergology & Clinical Immunology
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
#14
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/29191361/comparing-the-effects-of-fluticasone-anti-ige-and-anti-tnf-treatments-in-a-chronic-asthma-model
#15
M Y Ozkars, O Keskin, M Tokur, M Ulasli, B Gogebakan, H Ciralik, E Kucukosmanoglu, C Demirel, S Oztuzcu, H Kahraman
BACKGROUND: Corticosteroids are used in the treatment of asthma. The aim of this study was to determine the efficacy of anti-IgE and anti-TNF alpha as asthma treatments. METHODS: A mouse model of chronic asthma was developed. The fluticasone group was exposed to fluticasone and the anti-IgE and anti-TNF groups were administered anti-IgE or anti-TNF. IL-4, and IgE levels were measured, and histological analysis, pathological analysis and miRNA-126, miRNA-133a analyses were applied...
November 27, 2017: Allergologia et Immunopathologia
https://www.readbyqxmd.com/read/29187897/glycan-and-peptide-ige-epitopes-of-the-tnf-alpha-blockers-infliximab-and-adalimumab-precision-diagnostics-by-cross-reactivity-immune-profiling-of-patient-sera
#16
Arne Homann, Niels Röckendorf, Arno Kromminga, Andreas Frey, Thomas A Platts-Mills, Uta Jappe
Biological drugs like therapeutic antibodies are widely used for the treatment of various diseases like inflammatory disorders and cancer. A drawback of these novel treatments is the substantial proportion of patients experiencing adverse reactions such as loss-of-drug effect or hypersensitivity reactions. These reactions are associated with pre-existing and/or developing anti-drug antibodies. Especially IgE development is a risk factor for life-threatening systemic anaphylaxis. METHODS: In order to characterize the individual drug-specific serum IgE, an IgE cross-reactivity immune profiling (ICRIP) assay was developed...
2017: Theranostics
https://www.readbyqxmd.com/read/29175507/the-mast-cell-stabilizing-activity-of-chaga-mushroom-critical-for-its-therapeutic-effect-on-food-allergy-is-derived-from-inotodiol
#17
Thi Minh Nguyen Nguyet, Maria Lomunova, Ba Vinh Le, Ji Sun Lee, Seol Kyu Park, Jong Seong Kang, Young Ho Kim, Inkyu Hwang
While an anti-allergic effect of Chaga mushroom (Inonotus obliquus) has been indicated, its therapeutic effect on allergy and immunoregulatory mechanisms and chemical constituents directly responsible for that are hardly known. We examined the effect of 70% ethanol extract of Chaga mushroom (EE) and its dichloromethane (DF) and aqueous (AF) fractions using a mouse model of chicken ovalbumin (cOVA)-induced food allergy, and found that only EE and DF ameliorated allergy symptoms to a significant extent. The in vivo mast cell-stabilizing activity was also found only in EE and DF whereas the activities to suppress Th2 and Th17 immune responses and cOVA-specific IgE production in the small intestine were observed in all three treatment regimens, implying that inhibition of the mast cell function by lipophilic compounds was vital for the therapeutic effect...
November 23, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29173443/omalizumab-treatment-for-allergic-bronchopulmonary-aspergillosis-in-young-patients-with-cystic-fibrosis
#18
Caroline Perisson, Leila Destruys, Dominique Grenet, Laurence Bassinet, Jocelyne Derelle, Isabelle Sermet-Gaudelus, Caroline Thumerelle, Anne Prevotat, Vincent Rosner, Annick Clement, Harriet Corvol
BACKGROUND: Allergic bronchopulmonary aspergillosis (ABPA) is a severe lung disease complication caused by an Aspergillus fumigatus-induced hypersensitivity that affects 2-15% of patients with cystic fibrosis (CF). The mainstay treatment consists of a combination of corticosteroids and antifungals. However, repeated or long-term corticosteroid therapies can lead to serious side effects. The monoclonal anti-IgE antibody, omalizumab, has demonstrated its efficacy in allergic asthma. As ABPA results from a hypersensitivity to a specific allergen, omalizumab might benefit CF patients with ABPA...
December 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/29172299/the-effect-of-anti-ige-therapy-in-knee-osteoarthritis-a-pilot-observational-study
#19
A Aquili, L Farinelli, C Bottegoni, L Antonicelli, A Gigante
Osteoarthritis is a whole-joint disease and its pathogenesis remains poorly understood. Recent evidence proposed the importance of the innate immune system as trigger of synovium inflammation following the degeneration of cartilage. Moreover, synovial mast cells (MCs) might be correlated with pain and disability reported by patients. Anti IgE therapy represents a new class of MCs stabilizing agent, licensed for people with asthma and chronic urticaria. Therefore, we studied if the stabilizing effect of anti IgE would improve the pain and disability in patients affected by knee osteoarthritis and atopic disease...
October 2017: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/29171925/clinical-and-photobiological-response-in-eight-patients-with-solar-urticaria-under-treatment-with-omalizumab-and-review-of-the-literature
#20
D Morgado-Carrasco, X Fustà-Novell, S Podlipnik, A Combalia, P Aguilera
BACKGROUND: Solar urticaria (SU) is a rare photodermatosis. Treatment is challenging and outcomes are often disappointing. Omalizumab is an anti-IgE, currently approved for treatment of chronic spontaneous urticaria. We sought to evaluate therapy with omalizumab in refractory SU and describe predictive factors for response. MATERIALS/METHODS: Patients with refractory SU under treatment with omalizumab were included in this study. Clinical outcome was evaluated using the Urticaria Activity score 7 (UAS7), Dermatology Life Quality Index (DLQI) and Pruritus Visual Analogue scale (VAS)...
November 24, 2017: Photodermatology, Photoimmunology & Photomedicine
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