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https://www.readbyqxmd.com/read/28802100/influence-of-il-6-il-33-and-tnf-%C3%AE-on-human-mast-cell-activation-lessons-from-single-cell-analysis-by-flow-cytometry
#1
Nathalie Cop, Didier G Ebo, Chris H Bridts, Jessy Elst, Margo M Hagendorens, Christel Mertens, Margaretha A Faber, Luc S De Clerck, Vito Sabato
BACKGROUND: Mechanisms that govern priming and degranulation of human mast cells (MCs) remain elusive. Besides, most of our knowledge is based on experiments from which data only reflect an average of all stimulated cells. This study aims at investigating the effects of proinflammatory cytokines IL-6, IL-33, and TNF-α on IgE-dependent and IgE-independent activation of individual MCs. METHODS: MCs were derived from CD34(+) progenitors isolated from 50 mL whole blood from 4 healthy controls and 5 birch pollen allergic patients...
August 12, 2017: Cytometry. Part B, Clinical Cytometry
https://www.readbyqxmd.com/read/28802075/overcoming-severe-adverse-reactions-to-venom-immunotherapy-by-using-anti-ige-antibodies-in-combination-with-a-high-maintenance-dose
#2
Eva Stretz, Eva Maria Oppel, Räwer Helen-Caroline, René Chatelain, Sebastian Mastnik, Bernhard Przybilla, Franziska Ruëff
BACKGROUND: An omalizumab treatment and a high maintenance venom dose may both help to prevent recurrent systemic allergic reactions (SAR) to venom immunotherapy (VIT). The effectiveness of this combination therapy, however, is unclear. OBJECTIVE: We wanted to explore the possibility whether a temporary treatment with the anti-IgE antibody omalizumab, combined with a VIT using an elevated maintenance dose of >100 μg venom may establish a permanent tolerance of maintenance VIT...
August 12, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28782296/combining-anti-ige-with-oral-immunotherapy
#3
REVIEW
Chunrong Lin, Ivan T Lee, Vanitha Sampath, Chitra Dinakar, Rosemarie H DeKruyff, Lynda C Schneider, Kari C Nadeau
Food allergy is a significant medical problem that affects up to 8% of children in developed countries. At present, there are no curative therapies available in routine practice and management of food allergy involves strict allergen avoidance, education, and prompt treatment upon accidental exposure. Oral immunotherapy (OIT) is an efficacious experimental approach to food allergy and has been shown to provide a substantial benefit in terms of allergen desensitization. However, OIT is associated with high rates of allergic reactions, and the period of protection offered by OIT appears to be limited and highly variable...
August 7, 2017: Pediatric Allergy and Immunology
https://www.readbyqxmd.com/read/28763192/enhancing-the-affinity-of-anti-human-%C3%AE-thrombin-15-mer-dna-aptamer-and-anti-immunoglobulin-e-aptamer-by-polyt-extension
#4
Yunlong Bai, Yapiao Li, Dapeng Zhang, Hailin Wang, Qiang Zhao
Aptamer affinity capillary electrophoresis-laser-induced fluorescence (CE-LIF) for protein detection takes advantage of aptamers for their ease of synthesis and labeling, small size, and having many negative charges. Its success relies on the high binding affinity of aptamers. One 15-mer DNA aptamer (5'-GGT TGG TGT GGT TGG-3', Apt15) shows desirable specificity for human α-thrombin, an important enzyme with multiple functions in blood. However, Apt15 has weak binding affinity, and the use of Apt15 in affinity CE-LIF analysis remains challenging...
August 16, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28752717/justification-for-ige-as-a-therapeutic-target-in-chronic-spontaneous-urticaria
#5
M Sánchez-Borges, A Capriles-Hulet, F Caballero-Fonseca, L González-Aveledo
Monoclonal anti-IgE antibodies (omalizumab) are able to induce clinically significant benefits in patients with severe chronic spontaneous urticaria (CS). Those results led clinicians and investigators to reconsider a possible pathogenic role not previously supported for IgE and its receptors in this disease, and to investigate additional approaches for understanding its pathogenesis. IgE antibodies to unknown environmental allergens able to trigger chronic urticaria are not generally regarded as the etiologic factor for the disease...
July 2017: European Annals of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28751232/omalizumab-treatment-in-chronic-inducible-urticaria-a-systematic-review-of-published-evidence
#6
Marcus Maurer, Martin Metz, Randolf Brehler, Uwe Hillen, Thilo Jakob, Vera Mahler, Claudia Pföhler, Petra Staubach, Regina Treudler, Bettina Wedi, Markus Magerl
BACKGROUND: Omalizumab, a recombinant anti-IgE antibody, effectively treats chronic spontaneous urticaria. Evidence is lacking in chronic inducible urticarias (CIndUs), which are frequently H1-antihistamine resistant. OBJECTIVE: We aimed to determine, from the current published literature, the strength of evidence for omalizumab efficacy and safety in the treatment of CIndUs. METHODS: We performed a PubMed® search to identify evidence on omalizumab use in the following nine CIndU subtypes: symptomatic dermographism, cold urticaria, delayed pressure urticaria, solar urticaria, heat urticaria, vibratory angioedema, cholinergic urticaria, contact urticaria and aquagenic urticaria...
July 24, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28748365/urticaria-and-angioedema-an-update-on-classification-and-pathogenesis
#7
REVIEW
Susanne Radonjic-Hoesli, Kathrin Scherer Hofmeier, Sara Micaletto, Peter Schmid-Grendelmeier, Andreas Bircher, Dagmar Simon
Urticaria is a common, mast cell-driven disease presenting with wheals or angioedema or both. In the last years, urticaria has increasingly attracted notice to clinicians and researchers, last but not least inspired by the approval of omalizumab, an anti-IgE antibody, for urticaria treatment. There is wide consensus on the clinical classification based on duration and elicitation. However, the pathogenesis is incompletely understood. This review summarizes current guidelines for the management and novel insights in the pathogenesis of urticaria with special focus on their impact on clinical praxis...
July 26, 2017: Clinical Reviews in Allergy & Immunology
https://www.readbyqxmd.com/read/28734860/the-expanding-field-of-biologics-in-the-management-of-chronic-urticaria
#8
Shyam Joshi, David A Khan
Chronic urticaria (CU) is the occurrence of urticaria with or without angioedema for at least 6 weeks. Management has traditionally involved antihistamines as first-line therapy with various alternative therapies for refractory cases. Largely based on the success of biologics for various diseases, this class of drugs has come to the forefront of medical research. The first and only Food and Drug Administration-approved biologic for the management of CU is omalizumab (humanized anti-IgE mAb). In the past decade, a substantial amount of research has been centered on the mechanism of action, efficacy, dosing, and safety of omalizumab...
July 19, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28721017/targeted-therapy-in-severe-asthma-today-focus-on-immunoglobulin-e
#9
REVIEW
Girolamo Pelaia, Giorgio Walter Canonica, Andrea Matucci, Rossella Paolini, Massimo Triggiani, Pierluigi Paggiaro
Asthma is a complex chronic inflammatory disease of multifactorial etiology. International guidelines increasingly recognize that a standard "one size fits all" approach is no longer an effective approach to achieve optimal treatment outcomes, and a number of disease phenotypes have been proposed for asthma, which has the potential to guide treatment decisions. Among the many asthma phenotypes, allergic asthma represents the widest and most easily recognized asthma phenotype, present in up to two-thirds of adults with asthma...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28696863/update-on-oral-immunotherapy-for-egg-allergy
#10
François Graham, Natacha Tardio, Louis Paradis, Anne Des Roches, Philippe Bégin
Oral immunotherapy (OIT) is an emerging treatment for IgE-mediated egg allergy. In the past decade, a multitude of studies have assessed the potential for egg OIT to induce clinical desensitization. The following review will evaluate the efficacy and safety of this therapy as determined by randomized controlled, non-randomized controlled and uncontrolled trials. Recent studies using reduced allergenic egg products and anti-IgE assisted therapy to improve egg OIT safety will also be discussed. Recent advances in the mechanisms underlying food OIT suggest that certain immune parameters may be helpful in monitoring response to therapy, including egg OIT...
July 11, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28696336/perspectives-on-exhaled-nitric-oxide
#11
Fabio Luigi Massimo Ricciardolo, Philip E Silkoff
The history of nitric oxide (NO) in respiratory field dates back to the beginning of '90s with the ancestral study by Lars Gustafsson et al. describing the presence of endogenous NO in the exhaled breath of human beings. Soon after, independent studies showed that exhaled NO concentrations (FENO) is higher in asthmatics than in normal subjects. Not all asthmatics demonstrate a high FENO reflecting heterogeneity of asthma. High values of FENO are associated with over-expression of corticosteroid-sensitive iNOS isoform and allergic/eosinophilic inflammation...
July 11, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28691309/serial-d-dimer-plasma-levels-in-a-patient-with-chronic-spontaneous-urticaria-developing-resistance-to-omalizumab
#12
R Asero
Chronic spontaneous urticaria (CSU) is a condition presenting as the spontaneous occurrence of itchy weals with or without angio-oedema for > 6 weeks. A patient with severe chronic spontaneous urticaria who developed resistance to omalizumab is described. The patient's D-dimer plasma levels strictly paralleled the disease activity despite the administration of anti-IgE therapy.
July 10, 2017: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/28686296/a-comparative-study-on-basophil-activation-test-histamine-release-assay-and-passive-sensitization-histamine-release-assay-in-the-diagnosis-of-peanut-allergy
#13
Lau Fabricius Larsen, Nanna Juel-Berg, Kirsten Skamstrup Hansen, E N Clare Mills, Ronald van Ree, Lars K Poulsen, Bettina M Jensen
BACKGROUND: Allergy can be diagnosed using basophil tests. Several methods measuring basophil activation are available. This study aimed at comparing basophil activation test (BAT), histamine release assay (HR) and passive sensitization histamine release assay (passive HR) in the diagnosis of peanut allergy. METHODS: BAT, HR, and passive HR were performed on eleven peanut allergic and fourteen non-allergic subjects. Blood was incubated with peanut extract or anti-IgE and tests performed as follows: BAT - CD63-upregulation assessed by flow cytometry; HR - released histamine quantified by a glass fiber-based fluorometric method; Passive HR - IgE-stripped donor basophils were incubated with participants' serum and histamine release quantified as HR...
July 7, 2017: Allergy
https://www.readbyqxmd.com/read/28679488/toward-a-new-kind-of-vaccine-a-logical-extension-of-the-symmetrical-immune-network-theory
#14
Reginald Gorczynski, Geoffrey Hoffmann
BACKGROUND: The symmetrical immune network theory, developed in 1975, is based on the existence of specific T cell factors and hypothesizes that normal IgG immune responses comprise the production of 2 kinds of antibodies, namely antigen-specific antibodies and anti-idiotypic antibodies. OBJECTIVE: The aim of this study was to confirm the existence of specific T cells factors and to show that immunization of C3H mice with BL/6 skin or using nominal antigen for immunization (Tetanus Toxoid) induced production of antigen-specific (anti-BL/6 or antitetanus) antibodies plus anti-idiotypic antibodies (C3H anti-anti-C3H)...
July 5, 2017: Interactive Journal of Medical Research
https://www.readbyqxmd.com/read/28665049/the-regulatory-role-of-dipeptidyl-peptidase-i-on-the-activation-of-immune-granulocytes
#15
Yi Chu, Yaming Guo, Andrew F Walls, Xiaoying Zhou
Dipeptidyl peptidase I (DPPI), a lysosomal cysteine protease, required for activation of serine proteases of granulocytes including mast cells (MCs), neutrophils (NPs) and others, which were found in synovial tissue of patients with rheumatoid arthritis (RA). But, the role of DPPI associated with those cells in RA development is unclear. In this study, the collagen-induced-arthritis (CIA) rat-model was employed to investigate the expression and activity levels of DPPI and its association with RA progress. Primary granulocytes were freshly extracted from bone-marrows of normal or CIA rats, human mast cell line LAD-2 and primary neutrophils, human-recombinant-DPPI, DPPI-inhibitor Gly-Phe-CHN2 , LTB4, anti-IgE antibody, calcium ionophore were used to study the regulatory role of DPPI in cell activations...
June 30, 2017: Cell Biology International
https://www.readbyqxmd.com/read/28661105/-recommendation-for-evaluation-and-treatment-of-chronic-urticaria-the-israeli-association-for-allergy-and-clinical-immunology
#16
Nancy Levin Agmon, Aharon Kessel, Ramit Maoz Segal, Menachem Rottem, Yuval Tal, Ronit Confino-Cohen, Elias Tobi
Chronic urticaria is a disease manifested by a pruritic rash lasting longer than 6 weeks that may severely affect quality of life and daily function. Chronic urticaria can be further divided into chronic spontaneous urticaria which appears without a trigger and chronic inducible urticaria which evolves following distinct physical triggers. These two clinical manifestations could coexist in the same patient. The pathogenesis of chronic urticaria is not fully elucidated, although it is considered an autoimmune disease in at least 50% patients that produce auto- IgG antibodies targeted against the high affinity Fc receptor and to a lesser extent against IgE itself...
June 2017: Harefuah
https://www.readbyqxmd.com/read/28652400/activation-of-human-basophils-by-a549-lung-epithelial-cells-reveals-a-novel-ige-dependent-response-independent-of-allergen
#17
John T Schroeder, Anja P Bieneman
Evidence for epithelial cell (EC)-derived cytokines (e.g., thymic stromal lymphopoietin [TSLP]) activating human basophils remains controversial. We therefore hypothesize that ECs can directly activate basophils via cell-to-cell interaction. Basophils in medium alone or with IL-3 ± anti-IgE were coincubated with TSLP, IL-33, or IL-25. Analogous experiments cocultured basophils (1-72 h) directly with EC lines. Supernatants were tested for mediators and cytokines. Abs targeting receptors were tested for neutralizing effects...
August 1, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28651294/-ige-and-anti-ige-in-asthma-a-chequered-history
#18
M Lommatzsch, K Geißler, K-C Bergmann, J Christian Virchow
A long and winding road led to the discovery of immunoglobulin E (IgE) in 1966 and 1967. We are currently on a long and winding road to understand the immunologic basis of the clinical effects of the anti-IgE antibody omalizumab in asthma. It is possible that patients with asthma (as patients with chronic spontaneous urticaria) benefit in different immunologic ways from omalizumab treatment. This article reviews the history of IgE discovery and current concepts of anti-IgE therapy in asthma.
June 2017: Pneumologie
https://www.readbyqxmd.com/read/28647457/quantitative-in-vitro-and-in-vivo-models-to-assess-human-ige-b-cell-receptor-crosslinking-by-ige-and-empd-ige-targeting-antibodies
#19
Benjamin Vigl, Nina Salhat, Michela Parth, Halyna Pankevych, Andreas Mairhofer, Stefan Bartl, Oskar W Smrzka
Targeting plasma IgE by therapeutic mABs like Omalizumab (Xolair(®)) is current clinical practice for severe allergic conditions or other IgE related diseases like chronic urticaria. As an alternative to soluble IgE targeting, IgE supply can be lowered by targeting the Extracellular Membrane Proximal Domain (EMPD) of the IgE B cell receptor (BCR) present on IgE switched B cells. This ultimately leads to apoptosis of these cells upon IgE BCR crosslinking. Since tools to selectively assess the efficacy of IgE BCR crosslinking by IgE targeting antibodies are limited, a readily quantifiable cell model was developed that allows to specifically address IgE BCR crosslinking activity in vitro...
June 21, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/28635659/divergent-how-ige-axis-contributes-to-the-continuum-of-allergic-asthma-and-anti-ige-therapies
#20
REVIEW
Óscar Palomares, Silvia Sánchez-Ramón, Ignacio Dávila, Luis Prieto, Luis Pérez de Llano, Marta Lleonart, Christian Domingo, Antonio Nieto
Asthma is an airway disease characterised by chronic inflammation with intermittent or permanent symptoms including wheezing, shortness of breath, chest tightness, and cough, which vary in terms of their occurrence, frequency, and intensity. The most common associated feature in the airways of patients with asthma is airway inflammation. In recent decades, efforts have been made to characterise the heterogeneous clinical nature of asthma. The interest in improving the definitions of asthma phenotypes and endotypes is growing, although these classifications do not always correlate with prognosis nor are always appropriate therapeutic approaches...
June 21, 2017: International Journal of Molecular Sciences
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