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Allergy, Th2 cells

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https://www.readbyqxmd.com/read/29678672/genetic-restriction-of-antigen-presentation-dictates-allergic-sensitization-and-disease-in-humanized-mice
#1
Alina Neunkirchner, Bernhard Kratzer, Cordula Köhler, Ursula Smole, Lukas F Mager, Klaus G Schmetterer, Doris Trapin, Victoria Leb-Reichl, Edward Rosloniec, Ronald Naumann, Lukas Kenner, Beatrice Jahn-Schmid, Barbara Bohle, Rudolf Valenta, Winfried F Pickl
BACKGROUND: Immunoglobulin(Ig)E-associated allergies result from misguided immune responses against innocuous antigens. CD4+ T lymphocytes are critical for initiating and perpetuating that process, yet the crucial factors determining whether an individual becomes sensitized towards a given allergen remain largely unknown. OBJECTIVE: To determine the key factors for sensitization and allergy towards a given allergen. METHODS: We here created a novel human T cell receptor(TCR) and human leucocyte antigen (HLA)-DR1 (TCR-DR1) transgenic mouse model of asthma, based on the human-relevant major mugwort (Artemisia vulgaris) pollen allergen Art v 1 to examine the critical factors for sensitization and allergy upon natural allergen exposure via the airways in the absence of systemic priming and adjuvants...
April 5, 2018: EBioMedicine
https://www.readbyqxmd.com/read/29670037/expression-and-regulation-of-thymic-stromal-lymphopoietin-and-thymic-stromal-lymphopoietin-receptor-heterocomplex-in-the-innate-adaptive-immunity-of-pediatric-asthma
#2
REVIEW
Sheng-Chieh Lin, Fang-Yi Cheng, Jun-Jen Liu, Yi-Ling Ye
Asthma is a chronic inflammatory disease affecting the airway, and it is characterized by a wheezing breathing sound, variable airflow obstruction and the presence of inflammatory cells in the submucosa of the bronchi. Viral infection, pollutants and sensitivity to aeroallergens damage the epithelium from childhood, which causes asthma. The pathogenesis of asthma includes pathways of innate stimulation by environmental microbes and irritant pathogens. Damaged epithelial cells produce thymic stromal lymphopoietin (TSLP) and stimulate myeloid dendritic cell maturation through the thymic stromal lymphopoietin receptor (TSLPR) heterocomplex...
April 18, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29562801/long-term-effect-of-monophosphoryl-lipid-a-adjuvanted-specific-immunotherapy-in-patients-with-grass-pollen-allergy
#3
Stefan Zielen, Jennis Gabrielpillai, Eva Herrmann, Johannes Schulze, Ralf Schubert, Martin Rosewich
BACKGROUND: Ultra-short course pollen immunotherapy adjuvanted with monophosphoryl lipid A (MPL) is attractive to conventional allergen-specific immunotherapy (AIT). Long term efficacy of MPL-AIT has not been evaluated. METHODS: 68 patients (age 16.75 ± 5.3 years) with allergic rhinitis to grass pollen were investigated. Group 1: 21 controls; Group 2: 19 after complete AIT, and Group 3: 28 with AIT and treatment cessation: 4 years range 3-6 years ago. RESULTS: The clinical symptoms (running nose, sneezing, conjunctivitis and the weekly overall score) were significantly reduced in patients group 2 and 3 compared with controls without AIT p < 0...
March 22, 2018: Immunotherapy
https://www.readbyqxmd.com/read/29555351/mycoplasma-pneumoniae-induces-allergy-by-producing-p1-specific-ige
#4
Qing Ye, Jian-Hua Mao, Qiang Shu, Shi-Qiang Shang
BACKGROUND: Our previous study found that most of MPP patients had elevated serum total IgE levels. OBJECTIVE: The purpose of this paper is to determine components of mycoplasma pneumoniae that can cause IgE increase in children, and to clarify its specific mechanism. METHODS: The components of MP cells were isolated by serum IgE from patients with MP pneumonia (MPP). These components obtained through the prokaryotic expression were used as allergens to detect the proportion of allergen-specific IgE produced in MPP patients, and the clinical characteristics and related immune parameters of these patients who produced this allergen-specific IgE were also analyzed...
March 16, 2018: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/29521059/il-4ra-gene-expression-in-pbmc-with-regard-to-place-of-living-and-atopy-status
#5
Hanna Danielewicz, Anna Dębińska, Anna Drabik-Chamerska, Danuta Kalita, Andrzej Boznański
BACKGROUND: IL-4 and IL-4RA are key factors in allergic inflammation. IL-4 stimulates both IgE production and Th2 lymphocyte differentiation. Increased levels of IL-4 and IL-4RA have been shown in allergic patients. Genetic analyses have confirmed that polymorphisms within the IL-4RA gene influence the risk of allergy and can change the expression of the protein. Due to gene-environment interactions, this process is also likely to be modified by environmental exposure. OBJECTIVES: The aim of the study was to evaluate the IL-4RA gene expression in peripheral blood mononuclear cells (PBMC) from atopic and non-atopic subjects with regard to place of living (urban vs rural)...
February 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29518416/allergen-induced-activation-of-nk-cells-represents-an-early-life-immune-response-in-development-of-allergic-asthma
#6
Matthew C Altman, Elizabeth Whalen, Alkis Togias, George T O'Connor, Leonard B Bacharier, Gordon R Bloomberg, Meyer Kattan, Robert A Wood, Scott Presnell, Petra LeBeau, Katy Jaffee, Cynthia M Visness, William W Busse, James E Gern
BACKGROUND: Childhood asthma in inner city populations is a major public health burden and understanding early life immune mechanisms that promote asthma onset is key to disease prevention. Children who develop asthma demonstrate a high prevalence of aeroallergen sensitization and T helper 2 (Th2)-type inflammation, however the early life immune events that lead to Th2 skewing and disease development are unknown. OBJECTIVE: We sought to use RNA sequencing of peripheral blood mononuclear cells (PBMCs) collected at age 2 to determine networks of immune responses that occur in children who develop allergy and asthma...
March 5, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29509633/pediatric-eosinophilic-esophagitis-is-associated-with-increased-lamina-propria-immunoglobulin-g4-positive-plasma-cells
#7
Nissreen Mohammad, Vishal Avinashi, Edmond Chan, Bruce A Vallance, Elodie Portales-Casamar, Jonathan W Bush
OBJECTIVE: Eosinophilic esophagitis (EoE) is considered a TH2-mediated food allergy disease that leads to submucosal esophageal fibrosis and strictures. Recent studies focused on adults with EoE identified a strong association with elevated esophageal IgG4 immunostaining. Our study aimed to determine the association of IgG4 with EoE in pediatric patients. METHODS: Using our local EoE research registry, we identified 41 adequate biopsies from EoE patients. We used 10 age- and sex-matched patients with no diagnostic abnormalities at endoscopy or on biopsy...
March 5, 2018: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/29499238/diverse-functions-of-mir-17-92-cluster-micrornas-in-t-helper-cells
#8
Dirk Baumjohann
T helper (Th) cells are critically involved in adaptive immune responses against various pathogens. In contrast, dysregulated T helper cell responses are associated with a variety of diseases, including autoimmunity, allergies, and cancer. Differentiation of naïve CD4+ T cells into effector T helper cell subsets, including Th1, Th2, Th17, Treg, and Tfh, requires precise dosing of signaling molecules and transcription factors. MicroRNAs (miRNAs), which are small endogenously expressed RNAs that regulate gene expression, play important roles in these processes...
February 27, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29494957/polysaccharide-isolated-from-aloe-vera-gel-suppresses-ovalbumin-induced-food-allergy-through-inhibition-of-th2-immunity-in-mice
#9
Dajeong Lee, Hyuk Soon Kim, Eunju Shin, Seon-Gil Do, Chong-Kil Lee, Young Mi Kim, Min Bum Lee, Keun Young Min, Jimo Koo, Su Jeong Kim, Seung Taek Nam, Hyun Woo Kim, Young Hwan Park, Wahn Soo Choi
An allergic reaction occurs when the immune system overreacts to harmless substance called allergen that gains access to the body. Food allergy is a hypersensitive immune reaction to food proteins and the number of patients with food allergy has recently increased. Aloe Vera is used for wellness and medicinal purposes. In particular, Aloe vera has been reported to enhance immunity. However, the effect of Aloe vera on food allergy is not yet known. In this study, we investigated the effects of processed Aloe vera gel (PAG) containing low molecular weight Aloe polysaccharide (AP) on ovalbumin (OVA)-induced food allergy in mice...
May 2018: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29493227/assessment-of-the-allergenic-potential-of-the-main-egg-white-proteins-in-balb-c-mice
#10
Alba Pablos-Tanarro, Daniel Lozano-Ojalvo, Elena Molina, Rosina López-Fandiño
This work aimed to assess the contribution of the major egg white proteins, ovalbumin, ovomucoid and lysozyme, to the induction and elicitation of allergenic responses. For this purpose, BALB/c mice were orally administered either the individual egg allergens or a mixture of the three proteins in the same proportion, in order to evaluate their relative allergenicity avoiding their different abundance in egg white. Cholera toxin was used as a Th2-polarizing adjuvant. Ovomucoid and lysozyme triggered the most severe anaphylaxis reactions upon oral challenge...
March 1, 2018: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29466680/cytokine-responses-to-rhinovirus-and-development-of-asthma-allergic-sensitization-and-respiratory-infections-during-childhood
#11
Adnan Custovic, Danielle Belgrave, Lijing Lin, Eteri Bakhsoliani, Aurica G Telcian, Roberto Solari, Clare S Murray, Ross P Walton, John Curtin, Michael R Edwards, Angela Simpson, Magnus Rattray, Sebastian L Johnston
BACKGROUND: Immunophenotypes of anti-viral responses, and their relationship with asthma, allergy and lower respiratory tract infections (LRTIs) are poorly understood. We characterized multiple cytokine responses of peripheral-blood mononuclear cells to rhinovirus stimulation, and their relationship with clinical outcomes. METHODS: In a population-based birth cohort, we measured 28 cytokines post-stimulation with rhinovirus-16 in 307 children aged 11 years. We used machine learning to identify patterns of cytokine responses, and related these patterns to clinical outcomes using longitudinal models...
February 21, 2018: American Journal of Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29457221/association-of-stat6-gene-variants-with-food-allergy-diagnosed-by-double-blind-placebo-controlled-food-challenges
#12
C D van Ginkel, M E Pettersson, A E J Dubois, G H Koppelman
This study describes the role of two STAT6 gene variants in food allergy using data of patients and their parents who underwent double-blind placebo-controlled food challenges (DBPCFCs). After quality control, 369 trios were analyzed including 262 children (71.0%) with food allergy. Associations were tested by family based association testing (FBAT). The A alleles of both SNPs were associated with food allergy (p=0.036 and p=0.013 for rs324015 and rs1059513, respectively). Furthermore, these A alleles were associated with peanut allergy, higher sIgE levels to both peanut and cow's milk, more severe symptoms and higher eliciting doses during peanut and cow's milk DBPCFCs (all p<0...
February 19, 2018: Allergy
https://www.readbyqxmd.com/read/29454004/identification-and-analysis-of-peanut-specific-t-effector-and-t-regulatory-cells-in-children-allergic-and-tolerant-to-peanut
#13
Katherine A Weissler, Marjohn Rasooly, Tom DiMaggio, Hyejeong Bolan, Daly Cantave, David Martino, Melanie R Neeland, Mimi Lk Tang, Thanh D Dang, Katrina J Allen, Pamela A Frischmeyer-Guerrerio
BACKGROUND: Peanut allergy is potentially life-threatening and generally persists lifelong. Recent data suggests the skin may be an important route of initial sensitization to peanut, while early oral exposure to peanut is protective. In mice, T regulatory cells (Tregs) are central to development of tolerance to food, but their contribution to the pathogenesis of food allergy in humans is less clear. OBJECTIVE: We sought to quantify and phenotype peanut-specific CD4+ T effector (ps-Teff) and ps-Tregs in children with and without peanut allergy or sensitization...
February 14, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29439856/the-optimal-age-for-epicutaneous-sensitization-following-tape-stripping-in-balb-c-mice
#14
Masato Tamari, Keisuke Orimo, Kenichiro Motomura, Ken Arae, Akio Matsuda, Susumu Nakae, Hirohisa Saito, Hideaki Morita, Kenji Matsumoto
BACKGROUND: Direct contact of food proteins with eczematous lesions is thought to be the main cause of epicutaneous sensitization. To further investigate the development and pathogenesis of food allergy in vivo, a good mouse model of epicutaneous sensitization is needed. However, a fundamental problem in that regard is that the optimal age for epicutaneous sensitization of mice is unknown. In this study, we attempted to elucidate that optimal age. METHODS: Dorsal skin of wild-type BALB/c female mice (1, 3, 8 and 24 weeks old) was shaved, depilated and tape-stripped...
February 10, 2018: Allergology International: Official Journal of the Japanese Society of Allergology
https://www.readbyqxmd.com/read/29432856/aqueous-extracts-from-uncaria-tomentosa-willd-ex-schult-dc-reduce-bronchial-hyperresponsiveness-and-inflammation-in-a-murine-model-of-asthma
#15
Bruna Cestari de Azevedo, Lucas Junqueira de Freitas Morel, Fábio Carmona, Thiago Mattar Cunha, Silvia Helena Taleb Contini, Piero Giuseppe Delprete, Fernando Silva Ramalho, Eduardo Crevelin, Bianca Waléria Bertoni, Suzelei de Castro França, Marcos de Carvalho Borges, Ana Maria Soares Pereira
ETHNOPHARMACOLOGICAL RELEVANCE: Uncaria tomentosa (Willd. Ex Schult) DC is used by indigenous tribes in the Amazonian region of Central and South America to treat inflammation, allergies and asthma. The therapeutic properties of U. tomentosa have been attributed to the presence of tetracyclic and pentacyclic oxindole alkaloids and to phenolic acids. AIMS OF THE STUDY: To characterize aqueous bark extracts (ABE) and aqueous leaf extracts (ALE) of U. tomentosa and to compare their anti-inflammatory effects...
February 9, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29428795/poly-anhydride-nanoparticles-containing-cashew-nut-proteins-can-induce-a-strong-th1-and-treg-immune-response-after-oral-administration
#16
Marcela Araújo Pereira, Juliana de Souza Rebouças, Rafaela de Siqueira Ferraz Carvalho, Inés Luis de Redín, Priscila Valera Guerra, Carlos Gamazo, Claudia Ida Brodskyn, Juan M Irache, Nereide Stela Santos-Magalhães
Cashew nut allergy is the second most commonly reported tree nut allergy. Traditional allergen immunotherapy presents several clinical drawbacks that can be reduced by using nanoparticles-basedallergen-delivery systems, modulating the immune response towards a protective one. In this context, the goal of this work was to assess the potential of poly(anhydride) nanoparticles (NP) for cashew nut oral immunization. Cashew nut allergens-loaded nanoparticles (CNE-NP) were prepared by solvent displacement method...
February 8, 2018: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/29408715/single-cell-profiling-of-peanut-responsive-t-cells-in-peanut-allergic-subjects-reveals-heterogeneous-effector-th2-subsets
#17
David Chiang, Xintong Chen, Stacie M Jones, Robert A Wood, Scott H Sicherer, A Wesley Burks, Donald Y M Leung, Charuta Agashe, Alexander Grishin, Peter Dawson, Wendy F Davidson, Leah Newman, Robert Sebra, Miriam Merad, Hugh A Sampson, Bojan Losic, M Cecilia Berin
BACKGROUND: The contribution of phenotypic variation of peanut-specific T cells to clinical allergy or tolerance to peanut is not well understood. OBJECTIVES: Our objective was to comprehensively phenotype peanut-specific T cells in the peripheral blood of individuals with and without peanut allergy (PA). METHODS: We obtained samples from PA individuals, including a cohort undergoing baseline peanut challenges for an immunotherapy trial (CoFAR6)...
January 30, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29399438/type-2-cytokine-responses-regulating-immunity-to-helminth-parasites-and-allergic-inflammation
#18
Everett K Henry, Juan M Inclan-Rico, Mark C Siracusa
Purpose of Review: It is well established that T helper type 2 (TH 2) immune responses are necessary to provide protection against helminth parasites but also to promote the detrimental inflammation associated with allergies and asthma. Given the importance of type 2 immunity and inflammation, many studies have focused on better understanding the factors that regulate TH 2 cell development and activation. As a result, significant progress has been made in understanding the signaling pathways and molecular events necessary to promote TH 2 cell polarization...
December 2017: Current Pharmacology Reports
https://www.readbyqxmd.com/read/29393977/itgb4-is-essential-for-containing-hdm-induced-airway-inflammation-and-airway-hyperresponsiveness
#19
Chi Liu, Lin Yuan, Yizhou Zou, Ming Yang, Yu Chen, Xiangping Qu, Huijun Liu, Jianxin Jiang, Yang Xiang, Xiaoqun Qin
Airway epithelial cells play a significant role in the pathogenesis of asthma. Although the structural and functional defects of airway epithelial cells have been postulated to increase asthma susceptibility and exacerbate asthma severity, the mechanism and implication of these defects remain uncertain. Integrin β4 (ITGB4) is a structural adhesion molecule that is downregulated in the airway epithelium of asthma patients. In this study, we demonstrated that ITGB4 deficiency leads to severe allergy-induced airway inflammation and airway hyper-responsiveness (AHR) in mice...
February 2, 2018: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/29393209/therapeutic-role-for-tsp-2-antibody-in-a-murine-asthma-model
#20
Kai Li, En Ping Huang, Jin Su, Ping Zhu, Jun Lin, Shen Qiu Luo, Cui Lan Yang
BACKGROUND: Specific immunotherapy, including agonists for Toll-like receptor 2 (TLR2), have been shown to protect from allergies and to have a high immunomodulatory capacity. METHODS: A new antibody, TSP-2, reactive against an epitope of the extracellular domain of TLR2, was identified. The effect of the antibody on dendritic cells was assessed by immunohistochemistry, Western blot, and flow cytometric analysis. The effect of TSP-2 in a murine asthma model induced with ovalbumin (OVA) was assessed...
January 27, 2018: International Archives of Allergy and Immunology
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