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Maxime Luu, Marc Bardou, Philippe Bonniaud, Françoise Goirand
Omalizumab is a subcutaneously administrated monoclonal anti-IgE antibody indicated in adults, adolescents and children 6 years of age and older with moderate to severe allergic asthma uncontrolled by conventional pharmacological treatments and sensitization to at least one perennial allergen. Area covered: This drug evaluation summarizes published data on pharmacokinetic and pharmacodynamic properties of omalizumab, on clinical efficacy and safety, including real-world evidence, and provides a medico-economic evaluation of the drug...
October 17, 2016: Expert Opinion on Drug Metabolism & Toxicology
Steven Maltby, Peter G Gibson, Heather Powell, Vanessa M McDonald
BACKGROUND: Asthma and chronic obstructive pulmonary disease (COPD) are common airway diseases. Individuals with overlapping asthma and COPD experience increased health impairment and severe disease exacerbations. Efficacious treatment options are required for this population. Omalizumab (anti-IgE) therapy is effective in patients with severe, persistent asthma, but limited data are available on efficacy in populations with overlapping asthma and COPD. METHODS: Data from the Australian Xolair Registry (AXR) was used to compare treatment responses in individuals with asthma-COPD overlap to severe asthma alone...
October 11, 2016: Chest
Raphaële Nové-Josserand, Soazic Grard, Lila Auzou, Philippe Reix, Marlène Murris-Espin, François Brémont, Benyebka Mammar, Laurent Mely, Dominique Hubert, Isabelle Durieu, Pierre-Régis Burgel
Allergic bronchopulmonary aspergillosis (ABPA) affects up to 15% of patients with cystic fibrosis (CF). Corticosteroids are used as first-line therapy, but relapse and adverse effects commonly occur. Case reports have suggested the efficacy of the anti-IgE recombinant humanized monoclonal antibody omalizumab. A retrospective multicenter observational French study retrieved 32 CF patients (11 children and 21 adults) who have received omalizumab for more than 3 months in the context of ABPA. Clinical characteristics, concomitant medications (inhaled and oral corticosteroids, antifungal drugs), lung function, body mass index (BMI), and serum IgE were compared at the start and during the first year of omalizumab therapy...
October 7, 2016: Pediatric Pulmonology
T Hashimoto, A Ohzono, K Teye, S Numata, S Hiroyasu, D Tsuruta, T Hachiya, K Kuroda, M Hashiguchi, T Kawakami, N Ishii
BACKGROUND: IgE autoantibodies are considered to be involved in pathogenesis of bullous pemphigoid (BP), particularly inflammatory and erythematous phenotypes. OBJECTIVE: To develop reliable ELISAs for detection of IgE autoantibodies to both BP180 and BP230 in BP sera, and to compare the ELISA results with clinical features. METHODS: We used commercially available IgG ELISAs to develop IgE ELISAs for both BP180 and BP230. To determine the influence of excess amount of IgG autoantibodies, all normal and BP sera were tested before and after IgG adsorption...
October 7, 2016: British Journal of Dermatology
Jatinder Singh, Ramanpreet Shah, Dhandeep Singh
The mast cells are integral part of immune system and they have pleiotropic physiological functions in our body. Any type of abnormal stimuli causes the mast cells receptors to spur the otherwise innocuous mast cells to degranulate and release inflammatory mediators like histamine, cytokines, chemokines and prostaglandins. These mediators are involved in various diseases like allergy, asthma, mastocytosis, cardiovascular disorders, etc. Herein, we describe the receptors involved in degranulation of mast cells and are broadly divided into four categories: G-protein coupled receptors, ligand gated ion channels, immunoreceptors and pattern recognition receptors...
September 29, 2016: International Immunopharmacology
Kanokvalai Kulthanan, Papapit Tuchinda, Leena Chularojanamontri, Pattriya Chanyachailert, Wiwat Korkij, Amornsri Chunharas, Siriwan Wananukul, Wanida Limpongsanurak, Suwat Benjaponpitak, Wanee Wisuthsarewong, Kobkul Aunhachoke, Vesarat Wessagowit, Pantipa Chatchatee, Penpun Wattanakrai, Orathai Jirapongsananuruk, Jettanong Klaewsongkram, Nopadon Noppakun, Pakit Vichyanond, Puan Suthipinittharm, Kiat Ruxrungtham, Srisupalak Singalavanija, Jarungchit Ngamphaiboon
Urticaria is a common skin condition that can compromise quality of life and may affect individual performance at work or school. Remission is common in majority of patients with acute spontaneous urticaria (ASU); however, in chronic cases, less than 50% had remission. Angioedema either alone or with urticaria is associated with a much lower remission rate. Proper investigation and treatment is thus required. This guideline, a joint development of the Dermatological Society of Thailand, the Allergy, Asthma, and Immunology Association of Thailand and the Pediatric Dermatological Society of Thailand, is graded and recommended based on published evidence and expert opinion...
September 2016: Asian Pacific Journal of Allergy and Immunology
Jean Sainte-Laudy, François Touraine, Delphine Cluzan, François Belle Moudourou
BACKGROUND: A major problem of venom-specific immunotherapy (VIT) is the absence of reliable parameters for deciding treatment discontinuation. AIM OF THE STUDY: Intracutaneous tests (ICTs), the basophil activation test (BAT), specific IgEs (sIgEs) and blocking factor (BF) activity were measured during VIT. We made an evaluation by means of a protective index (PI) including ICT, BAT and BF values. MATERIAL AND METHODS: A population of 45 patients who had experienced a systemic reaction after an insect sting were tested before VIT (T0), at 1 week (T1w), at 10 weeks (T10w) and at 21 weeks (T21w), and, for a subgroup of 17 patients, at 3-5 years (T3-5y)...
September 30, 2016: International Archives of Allergy and Immunology
Nicolas Gaudenzio, Riccardo Sibilano, Thomas Marichal, Philipp Starkl, Laurent L Reber, Nicolas Cenac, Benjamin D McNeil, Xinzhong Dong, Joseph D Hernandez, Ronit Sagi-Eisenberg, Ilan Hammel, Axel Roers, Salvatore Valitutti, Mindy Tsai, Eric Espinosa, Stephen J Galli
Mast cells (MCs) influence intercellular communication during inflammation by secreting cytoplasmic granules that contain diverse mediators. Here, we have demonstrated that MCs decode different activation stimuli into spatially and temporally distinct patterns of granule secretion. Certain signals, including substance P, the complement anaphylatoxins C3a and C5a, and endothelin 1, induced human MCs rapidly to secrete small and relatively spherical granule structures, a pattern consistent with the secretion of individual granules...
October 3, 2016: Journal of Clinical Investigation
Aaron K Kobernick, A Wesley Burks
Food allergy has grown in rapidly in prevalence, currently affecting 5% of adults and 8% of children. Management strategy is currently limited to 1) food avoidance and 2) carrying and using rescue intramuscular epinephrine/adrenaline and oral antihistamines in the case of accidental ingestion; there is no FDA approved treatment. Recently, oral, sublingual and epicutaneous immunotherapy have been developed as active treatment of food allergy, though none have completed phase 3 study. Efficacy and safety studies of immunotherapy have been variable, though there is clearly signal that immunotherapy will be a viable option to desensitize patients...
October 2016: Allergology International: Official Journal of the Japanese Society of Allergology
Rusen Uzun, Arzu Didem Yalcin, Betul Celik, Tangul Bulut, Ata Nevzat Yalcin
BACKGROUND Toxic epidermal necrolysis (TEN) is characterized by widespread erythematous and bullous lesions on the skin. Nowadays, considerable progress has been made in the understanding of its pathogenesis. Immunologically it is similar to graft-versus-host disease. Therefore, we may propose that TEN is a disorder of cell-mediated immunity. CASE REPORT Our patient was a 74-year-old white female who had pneumonia and was positive for hepatitis C virus (HCV), and who had been on levofloxacin therapy. After the first levofloxacin dose, erythematous dusky red macules occurred on her extremities and trunk, and on the following day, confluent purpuric lesions tended to run together over 85% of her body...
2016: American Journal of Case Reports
Issan Yee San Tam, Chun Wai Ng, See-Ying Tam, Hang Yung Alaster Lau
OBJECTIVE: The aim of this study was to develop a novel protocol for generating large populations of fully mature and functional human mast cells (HMC) from CD34(+) hematopoietic stem cells which require less culturing time than previously reported methods. METHODS: CD34(+) cells isolated from fresh human buffy coats were sequentially cultured with different combinations of SCF, IL-6, IL-3, IL-9 and IL-4 under selected culturing conditions and time periods. Cells were then harvested for immunohistochemical characterization of morphological phenotypes and were functionally characterized by assessing their responses to IgE-dependent and -independent stimuli by measuring the release of inflammatory mediators and cytokines...
September 15, 2016: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
Roxane Labrosse, François Graham, Anne Des Roches, Philippe Bégin
Food allergy is an important health issue that affects up to 8 % of the population. The management of allergic patients involves allergen avoidance and prompts the treatment of accidental reactions, as no curative treatment is available so far in routine practice. Oral immunotherapy (OIT) is a promising therapeutic alternative, but it is associated with frequent allergic reactions and cost-effectiveness issues. In hopes of reducing such reactions, a number of trials have used omalizumab, an anti-IgE monoclonal humanized antibody, as adjunctive therapy in OIT...
September 14, 2016: Archivum Immunologiae et Therapiae Experimentalis
Andrew J MacGinnitie, Rima Rachid, Hana Gragg, Sara V Little, Paul Lakin, Antonella Cianferoni, Jennifer Heimall, Melanie Makhija, Rachel Robison, R Sharon Chinthrajah, John Lee, Jennifer Lebovidge, Tina Dominguez, Courtney Rooney, Megan Ott Lewis, Jennifer Koss, Elizabeth Burke-Roberts, Kimberly Chin, Tanya Logvinenko, Jacqueline A Pongracic, Dale T Umetsu, Jonathan Spergel, Kari C Nadeau, Lynda C Schneider
BACKGROUND: Peanut oral immunotherapy is a promising approach to peanut allergy, but reactions are frequent, and some patients cannot be desensitized. The anti-IgE medication omalizumab (Xolair; Genentech, South San Francisco, Calif) might allow more rapid peanut updosing and decrease reactions. OBJECTIVE: We sought to evaluate whether omalizumab facilitated rapid peanut desensitization in highly allergic patients. METHODS: Thirty-seven subjects were randomized to omalizumab (n = 29) or placebo (n = 8)...
September 5, 2016: Journal of Allergy and Clinical Immunology
J T Lin
No abstract text is available yet for this article.
September 2016: Chinese Journal of Tuberculosis and Respiratory Diseases
Kenji Izuhara, Shoichiro Ohta, Junya Ono
Periostin acts both as an extracellular matrix protein belonging to the fasciclin family and as a matricellular protein functioning in cell activation by binding to its receptors on the cell surface. It has been established that periostin is a downstream molecule of interleukin (IL)-13, a signature type 2 cytokine, and that periostin plays an important role in the pathogenesis of allergic diseases, including asthma. Based on these findings, much attention has been paid to periostin as a biomarker useful in the treatment of asthma...
November 2016: Allergy, Asthma & Immunology Research
Bernard Panaszek, Robert Pawłowicz, Jędrzej Grzegrzółka, Andrzej Obojski
Recent years of research have shed a new light on the role of IgE in immune reactions. It seems to be more than just a contribution to immediate type of allergic response. It appears that monomeric IgE may enhance mast cell activity without cross-linking of FcεRI by IgE specific allergen or autoreactive IgG anti-IgE antibodies. Monomeric IgE molecules are heterogeneous concerning their ability to induce survival and activation of mast cells only by binding the IgE to FcεRI, but not affecting degranulation of cells...
August 31, 2016: Archivum Immunologiae et Therapiae Experimentalis
Gustavo Deza, Ana M Giménez-Arnau
Urticaria is a common skin disorder defined by the occurrence of itchy and even painful wheals, angioedema, or both. The lifetime prevalence for its acute and chronic form is 20 and 1%, respectively. The patients' quality of life is impaired because of itch, disfigurement, and high associated comorbidity. To understand the pathophysiology of the wheal in order to ensure a correct therapeutic approach is critical. Mast cells are the primary effector cells in urticaria, which produce and secrete a variety of inflammatory mediators, mainly histamine...
2016: Current Problems in Dermatology
Yang Xia, Wen Li, Huahao Shen
No abstract text is available yet for this article.
August 22, 2016: Journal of Asthma: Official Journal of the Association for the Care of Asthma
Kaori Mukai, Nicolas Gaudenzio, Sheena Gupta, Nora Vivanco, Sean C Bendall, Holden T Maecker, Rebecca S Chinthrajah, Mindy Tsai, Kari C Nadeau, Stephen J Galli
BACKGROUND: Basophil activation tests (BATs) have promise for research and for clinical monitoring of patients with allergies. However, BAT protocols vary in blood anticoagulant used and temperature and time of storage before testing, complicating comparisons of results from various studies. OBJECTIVE: We attempted to establish a BAT protocol that would permit analysis of blood within 24 hours of obtaining the sample. METHODS: Blood from 46 healthy donors and 120 patients with peanut allergy was collected into EDTA or heparin tubes, and samples were stored at 4°C or room temperature for 4 or 24 hours before performing BATs...
July 15, 2016: Journal of Allergy and Clinical Immunology
Sven Becker, Thomas Schlederer, Matthias F Kramer, Mareike Haack, Susanne Vrtala, Yvonne Resch, Christian Lupinek, Rudolf Valenta, Moritz Gröger
BACKGROUND: Dermatophagoides pteronyssinus is one of the most important perennial allergen sources worldwide. Molecular diagnostics using the commercially available major allergens (Der p 1 and Der p 2) in combination with Der p 10 do not detect house dust mite (HDM) sensitization in a number of cases when used alone. The objective was to evaluate the IgE reactivity profiles of these patients using an experimental immunoassay biochip. METHODS: Sera of HDM-allergic patients (positive skin prick test, CAP class ≥1 for allergen extract, and positive intranasal provocation) were tested for IgE antibodies against Der p 1, Der p 2, and Der p 10 by ImmunoCAP fluorescence enzyme immunoassay...
2016: International Archives of Allergy and Immunology
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