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https://www.readbyqxmd.com/read/29164823/immunoglobulin-g-structure-and-functional-implications-of-different-subclass-modifications-in-initiation-and-resolution-of-allergy
#1
REVIEW
Timothy H Scott-Taylor, Stefan-Claudiu Axinia, Sumeya Amin, Ruth Pettengell
IgE and not IgG is usually associated with allergy. IgE lodged on mast cells in skin or gut and basophils in the blood allows for the prolonged duration of allergy through the persistent expression of high affinity IgE receptors. However, many allergic reactions are not dependent on IgE and are generated in the absence of allergen specific and even total IgE. Instead, IgG plasma cells are involved in induction of, and for much of the pathogenesis of, allergic diseases. The pattern of IgG producing plasma cells in atopic children and the tendency for direct or further class switching to IgE are the principle factors responsible for long-lasting sensitization of mast cells in allergic children...
November 21, 2017: Immunity, Inflammation and Disease
https://www.readbyqxmd.com/read/29164723/double-blind-placebo-controlled-trial-of-the-effect-of-omalizumab-on-basophils-in-chronic-urticaria-patients
#2
Lukas Jörg, Tatjana Pecaric-Petkovic, Stephan Reichenbach, Michael Coslovsky, Odile Stalder, Werner Pichler, Oliver Hausmann
BACKGROUND: Omalizumab has been shown to be effective in treating chronic spontaneous urticaria (CSU). The reduction of FcεRI receptor density on the surface of basophils and mast cells is thought to play a major role in its effectiveness. We conducted a double-blind, randomized, placebo-controlled trial to investigate the mode of action of omalizumab in patients with antihistamine-resistant CSU. METHODS: Thirty patients were randomized in a 2:1 ratio to receive either 300 mg omalizumab or placebo...
November 22, 2017: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29162425/usefulness-of-basophil-activation-test-for-the-diagnosis-of-ige-mediated-hypersensitivity-to-tetanus-toxoid-vaccine
#3
Blanca Herreros, Yesica Méndez, Francisco Feo-Brito, José Miguel Urra
A great number of vaccinated patients develop specific anti-tetanus toxoid IgE, but usually do not undergo any adverse effect. Most of the allergic reactions to tetanus toxoid vaccine usually present with unspecific symptoms of local inflammation. In the presence of severe reactions, and in a special way if the vaccine is provided together with other drugs, it is difficult to establish which is the harmful drug responsible for IgE-mediated adverse reaction. A patient with an anaphylactic reaction after the administration of Toxoid Tetanic (TT) along with several drugs is described...
November 18, 2017: Journal of Immunological Methods
https://www.readbyqxmd.com/read/29159255/comparative-diagnostic-performance-of-the-granulocyte-and-neutrophil-counts
#4
Nicola S Pether, Jessica L Brothwood, Cornelis van Berkel, Elaine H Dunwoodie, Robert L Blake, Christopher P Price, Richard G Jones, Karl S Baker, Geoff Hall
Objectives: Use of point-of-care testing is increasing, however many haematology analysers can only determine granulocyte count without further differentiation into neutrophils, eosinophils and basophils. Since the diagnosis of life-threatening neutropenia in cancer patients requires a distinct neutrophil count, this study aimed to determine the comparative performance between the neutrophil and granulocyte count. Design and methods: A database of 508 646 venous full blood count results measured on a laboratory reference analyser was mined from a large oncology unit...
December 2017: Pract Lab Med
https://www.readbyqxmd.com/read/29157945/food-allergy-a-review-and-update-on-epidemiology-pathogenesis-diagnosis-prevention-and-management
#5
Scott H Sicherer, Hugh A Sampson
This review provides general information to serve as a primer for those embarking on understanding food allergy and also details advances and updates in epidemiology, pathogenesis, diagnosis and treatment that have occurred over the four years since our last comprehensive review. Although firm prevalence data are lacking, there is a strong impression that food allergy has increased, and rates as high as ∼10% have been documented. Genetic, epigenetic and environmental risk factors are being increasingly elucidated, opening the potential for improved prevention and treatment strategies targeted to those at risk...
November 17, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29157860/advances-in-rhinitis-models-and-mechanisms
#6
REVIEW
Anne K Ellis, Mark W Tenn
OBJECTIVE: To summarize studies highlighting recent advances in rhinitis-related research in the past 2 years. DATA SOURCES: Original research articles were procured and examined from the Rhinitis and Upper Airway Disease section of the 2015 to 2017 Annals of Allergy, Asthma & Immunology issues. Additional original research articles were identified from PubMed and Google Scholar using the following search terms: allergic rhinitis, rhinitis, chronic rhinosinusitis, environmental exposure unit, and nasal allergen challenge...
November 18, 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/29149416/history-of-histamine-releasing-factor-hrf-translationally-controlled-tumor-protein-tctp-including-a-potential-therapeutic-target-in-asthma-and-allergy
#7
Susan M MacDonald
Histamine-releasing factor (HRF) also known as translationally controlled tumor protein (TCTP) is a highly conserved, ubiquitous protein that has both intracellular and extracellular functions. Here we will highlight the subcloning of the molecule, its clinical implications, as well as an inducible-transgenic mouse. Particular attention will be paid to its extracellular functioning and its potential role as a therapeutic target in asthma and allergy. The cells and the cytokines that are produced when stimulated or primed by HRF/TCTP will be detailed as well as the downstream signaling pathway that HRF/TCTP elicits...
2017: Results and Problems in Cell Differentiation
https://www.readbyqxmd.com/read/29148756/inhibitory-activities-of-compounds-from-the-marine-actinomycete-williamsia-sp-mccc-1a11233-variant-on-ige-mediated-mast-cells-and-passive-cutaneous-anaphylaxis
#8
Yuanyuan Gao, Qingmei Liu, Bo Liu, Chun-Lan Xie, Min-Jie Cao, Xian-Wen Yang, Guang-Ming Liu
Compounds of the deep-sea-derived marine Williamsia sp. MCCC 1A11233 (CDMW), which are secondary metabolites of the actinomycetes, were isolated. In this study, seven kinds of CDMW were found to decrease degranulation and histamine release in immunoglobulin E (IgE)-mediated rat basophilic leukemia (RBL)-2H3 cells. The production of cytokines (tumor necrosis factor-α and interleukin-4) was inhibited by these CDMW in RBL-2H3 cells, and their chemical structures were established mainly based on detailed analysis of their NMR spectra...
November 17, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29141759/cell-type-specific-immunomodulation-induced-by-helminthes-effect-on-metainflammation-insulin-resistance-and-type-2-diabetes
#9
Vivekanandhan Aravindhan, Gowrishankar Anand
Recent epidemiological studies have documented an inverse relationship between the decreasing prevalence of helminth infections and the increasing prevalence of metabolic diseases ("metabolic hygiene hypothesis"). Chronic inflammation leading to insulin resistance (IR) has now been identified as a major etiological factor for a variety of metabolic diseases other than obesity and Type-2 diabetes (metainflammation). One way by which helminth infections such as filariasis can modulate IR is by inducing a chronic, nonspecific, low-grade, immune suppression mediated by modified T-helper 2 (Th2) response (induction of both Th2 and regulatory T cells) which can in turn suppress the proinflammatory responses and promote insulin sensitivity (IS)...
October 30, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29140561/interaction-among-smoking-status-single-nucleotide-polymorphisms-and-markers-of-systemic-inflammation-in-healthy-individuals
#10
Thitiya Luetragoon, Lars Erik Rutqvist, Orathai Tangvarasittichai, Bengt-Åke Andersson, Sture Löfgren, Kanchana Usuwanthim, Nongnit Laytragoon Lewin
Cigarette smoke contains toxic and carcinogenic substances that contribute to the development of cancer and various diseases. Genetic variation might be important because not all smokers develop smoking-related disease. The current study addressed the possible interactions among selected single nucleotide polymorphisms (SNPs) in genes related to systemic inflammation, smoking status, the levels of circulating immune response cells and plasma biomarkers of systemic inflammation. Sixty-four healthy blood donors were recruited, of whom 31 were current smokers and 33 were never-users of tobacco products, references...
November 15, 2017: Immunology
https://www.readbyqxmd.com/read/29138425/timescale-separation-of-positive-and-negative-signaling-creates-history-dependent-responses-to-ige-receptor-stimulation
#11
Brooke Harmon, Lily A Chylek, Yanli Liu, Eshan D Mitra, Avanika Mahajan, Edwin A Saada, Benjamin R Schudel, David A Holowka, Barbara A Baird, Bridget S Wilson, William S Hlavacek, Anup K Singh
The high-affinity receptor for IgE expressed on the surface of mast cells and basophils interacts with antigens, via bound IgE antibody, and triggers secretion of inflammatory mediators that contribute to allergic reactions. To understand how past inputs (memory) influence future inflammatory responses in mast cells, a microfluidic device was used to precisely control exposure of cells to alternating stimulatory and non-stimulatory inputs. We determined that the response to subsequent stimulation depends on the interval of signaling quiescence...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29135514/prevalence-and-clinical-characteristics-of-local-allergic-rhinitis-to-house-dust-mites
#12
Yoo Seob Shin, Chang-Gyu Jung, Hae-Sim Park
PURPOSE OF REVIEW: Local allergic rhinitis (LAR) is a recently classified subtype of rhinitis defined by a nasal allergic response in patients without systemic evidence of atopy. Recent studies have reported the prevalence, clinical course, culprit allergens, diagnostic methods and treatment outcomes of LAR. The purpose of this review is to summarize the most relevant and updated scientific evidence for LAR, especially focusing on its prevalence and clinical characteristics. RECENT FINDINGS: LAR is found in a significant proportion (3...
November 14, 2017: Current Opinion in Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29128670/synchronous-immune-alterations-mirror-clinical-response-during-allergen-immunotherapy
#13
Amedee Renand, Mohamed H Shamji, Kristina M Harris, Tielin Qin, Erik Wambre, Guy W Scadding, Peter A Wurtzen, Stephen J Till, Alkis Togias, Gerald T Nepom, William W Kwok, Stephen R Durham
BACKGROUND: Three years treatment with either sublingual or subcutaneous allergen immunotherapy has been shown to be effective and to induce long-term tolerance. The GRASS(∗) trial demonstrated that two years treatment via either route was effective in suppressing the response to nasal allergen challenge, although was insufficient for inhibition one year after discontinuation. OBJECTIVE: To examine in the GRASS trial the time-course of immunologic changes during two years sublingual and subcutaneous immunotherapy and for one year after treatment discontinuation...
November 8, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29127694/nut-co-reactivity-acquiring-knowledge-for-elimination-recommendations-nut-cracker-study
#14
Arnon Elizur, Michael Y Appel, Liat Nachshon, Michael B Levy, Naama Epstein-Rigby, Keren Golobov, Michael Goldberg
BACKGROUND: Ambiguities exist regarding the diagnosis of tree-nut allergy, necessitating either elimination or performance of oral food challenges (OFC). OBJECTIVE: To examine the co-incidences of allergies among tree-nuts and improve diagnostic testing to minimize the need for OFC. METHODS: Eighty three patients prospectively evaluated for walnut, pecan, cashew, pistachio, hazelnut and almond allergy. A history of previous reactions was obtained and standardized skin prick tests (SPT) using finely ground tree-nut solution and basophil activation tests (BAT) were performed...
November 11, 2017: Allergy
https://www.readbyqxmd.com/read/29123241/toxoplasma-gondii-tachyzoite-extract-acts-as-a-potent-immunomodulator-against-allergic-sensitization-and-airway-inflammation
#15
Mirjana Drinić, Angelika Wagner, Priya Sarate, Christian Zwicker, Elke Korb, Gerhard Loupal, Roman Peschke, Anja Joachim, Ursula Wiedermann, Irma Schabussova
Epidemiological and experimental studies have shown an inverse relationship between infections with certain parasites and a reduced incidence of allergic diseases. We and others have shown that infection with Toxoplasma gondii prevents the development of allergy in mice. To establish whether this beneficial effect could be recapitulated by soluble products of this parasite, we tested an extract derived from T. gondii tachyzoites. Immunization of BALB/c mice with tachyzoites lysate antigen (TLA) elicited mixed Th1/Th2 responses...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29118971/local-allergic-rhinitis-evolution-of-concepts
#16
EDITORIAL
Cristoforo Incorvaia, Nicola Fuiano, Irene Martignago, Bruna L Gritti, Erminia Ridolo
The discovery of an exclusive local production of IgE antibodies dates back to the 1970s, but only recently the pathophysiology of such phenomenon was deeply investigated, leading to the concept of local allergic rhinitis (LAR). Currently, LAR is defined by the occurrence, in patients with symptoms clearly suggesting allergic rhinitis but with negative results to common allergy testing, of allergen specific IgE in the nasal mucosa. Most studies investigating LAR were based on the development of rhinitis symptoms following nasal provocation test (NPT) with the suspected allergens, but such test may be performed by a number of options, none of them being as yet acknowledged and recommended in consensus document...
2017: Clinical and Translational Allergy
https://www.readbyqxmd.com/read/29117222/a-chimeric-ige-that-mimics-ige-from-patients-allergic-to-acid-hydrolyzed-wheat-proteins-is-a-novel-tool-for-in-vitro-allergenicity-assessment-of-functionalized-glutens
#17
Olivier Tranquet, Jean-Charles Gaudin, Sarita Patil, Johanna Steinbrecher, Kayoko Matsunaga, Reiko Teshima, Shinobu Sakai, Colette Larré, Sandra Denery-Papini
BACKGROUND: Acid-hydrolyzed wheat proteins (acid-HWPs) have been shown to provoke severe allergic reactions in Europe and Japan that are distinct from classical wheat allergies. Acid-HWPs were shown to contain neo-epitopes induced by the deamidation of gluten proteins. However, products with variable rates of deamidation can be found. OBJECTIVES: In this work, we studied the effect of the extent of wheat proteins deamidation on its allergenicity. A recombinant chimeric IgE was produced and compared to patients' IgE for its capacity to assess the IgE-mediated triggering potential of acid-HWPs...
2017: PloS One
https://www.readbyqxmd.com/read/29116752/nonoptical-detection-of-allergic-response-with-a-cell-coupled-gate-field-effect-transistor
#18
Haoyue Yang, Masatoshi Honda, Akiko Saito, Taira Kajisa, Yuhki Yanase, Toshiya Sakata
In this study, we report the label-free and reliable detection of allergic response using a cell-coupled gate field-effect transistor (cell-based FET). Rat basophilic leukemia (RBL-2H3) cells were cultured as a signal transduction interface to induce allergic reaction on the gate oxide surface of the FET, because IgE antibodies, which bind to Fcε receptors at the RBL-2H3 cell membrane, are specifically cross-linked by allergens, resulting in the allergic response of RBL-2H3 cells. In fact, the surface potential at the FET gate decreased owing to secretions such as histamine from the IgE-bound RBL-2H3 cells, which reacted with the allergen...
November 15, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29114903/occupational-generalized-urticaria-and-anaphylaxis-after-inhalation-of-cefuroxime-in-a-nurse
#19
Rolf Merget, Ingrid Sander, Manigé Fartasch, Vera van Kampen, Stefani Röseler, Hans Merk, Gerda Wurpts, Monika Raulf, Thomas Brüning
We present the case of a 53 years old nonatopic female nurse who experienced repeated anaphylactic reactions at work without involvement in drug-specific tasks such as crushing of tablets or preparation of injections. The causal allergen was not identified until a further severe anaphylactic reaction occurred after oral use of cefuroxime during a respiratory infection. Sensitization to cefuroxime was demonstrated by specific IgE, basophil activation test and skin prick test. An inhalation challenge with a dosimeter induced generalized urticaria after a cumulative dose of about 10 μg of the drug, but no asthmatic reaction...
November 8, 2017: American Journal of Industrial Medicine
https://www.readbyqxmd.com/read/29112016/b-lymphoblastic-leukemia-lymphoma-with-burkitt-like-morphology-and-igh-myc-rearrangement-report-of-3-cases-in-adult-patients
#20
Yiting Li, Gunjan Gupta, Ari Molofsky, Yi Xie, Nader Shihabi, Jane McCormick, Elaine S Jaffe
Isolated MYC rearrangement without other recurrent genetic abnormalities is rare in B lymphoblastic leukemia/lymphoma (B-ALL/LBL), with most cases reported in pediatric patients. We report 3 adult cases with lymphoblasts showing a precursor B cell immunophenotype, and isolated MYC/IGH translocation. All 3 cases occurred in male patients with initial presentation of diffuse lymphadenopathy. Cases 1 and 2 had B-ALL with significantly increased lymphoblasts in peripheral blood and bone marrow. Case 3, a patient with human immunodeficiency virus infection, had the diagnosis of B-LBL made on a retroperitoneal lymph node biopsy and had no peripheral blood or bone marrow involvement...
November 3, 2017: American Journal of Surgical Pathology
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