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Treg IgE

Willem S Lexmond, Jeremy A Goettel, Jonathan J Lyons, Justin Jacobse, Marion M Deken, Monica G Lawrence, Thomas H DiMaggio, Daniel Kotlarz, Elizabeth Garabedian, Paul Sackstein, Celeste C Nelson, Nina Jones, Kelly D Stone, Fabio Candotti, Edmond H H M Rings, Adrian J Thrasher, Joshua D Milner, Scott B Snapper, Edda Fiebiger
In addition to the infectious consequences of immunodeficiency, patients with Wiskott-Aldrich syndrome (WAS) often suffer from poorly understood exaggerated immune responses that result in autoimmunity and elevated levels of serum IgE. Here, we have shown that WAS patients and mice deficient in WAS protein (WASP) frequently develop IgE-mediated reactions to common food allergens. WASP-deficient animals displayed an adjuvant-free IgE-sensitization to chow antigens that was most pronounced for wheat and soy and occurred under specific pathogen-free as well as germ-free housing conditions...
October 3, 2016: Journal of Clinical Investigation
Soojin Park, Hwan-Suck Chung, Dasom Shin, Kyung-Hwa Jung, Hyunil Lee, Junghee Moon, Hyunsu Bae
Foxp3 is a master regulator of CD4(+)CD25(+) regulatory T-cell (Treg) function and is also a suppressor of SKP2 and HER2/ErbB2. There are an increasing number of reports describing the functions of Foxp3 in cell types other than Tregs. In this context, we evaluated the functions of Foxp3 in ovalbumin- and cockroach-induced asthma models. Foxp3-EGFP-expressing adenovirus or EGFP control adenovirus was administered intratracheally (i.t.), followed by challenge with ovalbumin (OVA) or cockroach extract to induce asthma...
September 16, 2016: Experimental & Molecular Medicine
Min-Jung Bae, Hee Soon Shin, Hye-Jeong See, Sun Young Jung, Da-Ae Kwon, Dong-Hwa Shon
The incidence of food allergy, which is triggered by allergen permeation of the gastrointestinal tract followed by a T-helper (Th) 2-mediated immune response, has been increasing annually worldwide. We examined the effects of baicalein (5,6,7-trihydroxyflavone), a flavonoid from Scutellaria baicalensis used in oriental herbal medicine, on regulatory T (Treg) cell induction and intestinal barrier function through the regulation of tight junctions in a mouse model of food allergy. An allergic response was induced by oral challenge with ovalbumin, and the incidence of allergic symptoms and T cell-related activity in the mesenteric lymph nodes were analyzed with and without the presence of baicalein...
2016: Scientific Reports
Martin F Bachmann, Thomas M Kündig
IgE-mediated allergies, in particular allergic rhino-conjunctivitis and asthma, have reached epidemic proportions, affecting about one third of the population in developed countries. The most effective treatment for allergies is specific immunotherapy (SIT), which involves the injection of increasing doses of an allergen extract to allergic individuals. The current form of SIT was first introduced 1911 and recently celebrated its 100(th) birthday for the treatment of hay fever. The concept of this therapy at the time was straight-forward, since it was believed that pollen contained toxins against which the patient could be vaccinated...
August 24, 2016: Allergy
Lorella Paparo, Rita Nocerino, Linda Cosenza, Rosita Aitoro, Valeria D'Argenio, Valentina Del Monaco, Carmen Di Scala, Antonio Amoroso, Margherita Di Costanzo, Francesco Salvatore, Roberto Berni Canani
BACKGROUND: DNA methylation of the Th1 and Th2 cytokine genes is altered during cow's milk allergy (CMA). Forkhead box transcription factor 3 (FoxP3) is essential for the development and function of regulatory T cells (Tregs) and is involved in oral tolerance acquisition. We assessed whether tolerance acquisition in children with IgE-mediated CMA is associated with DNA demethylation of the Treg-specific demethylated region (TSDR) of FoxP3. RESULTS: Forty children (aged 3-18 months) were enrolled: 10 children with active IgE-mediated CMA (group 1), 10 children who outgrew CMA after dietary treatment with an extensively hydrolyzed casein formula containing the probiotic Lactobacillus rhamnosus GG (group 2), 10 children who outgrew CMA after treatment with other formulas (group 3), and 10 healthy controls (group 4)...
2016: Clinical Epigenetics
So Hyun Jo, Yun Jung Lee, Dae Gill Kang, Ho Sub Lee, Dae Ki Kim, Min Cheol Park
IgE-mediated mast cell degranulation and excessive Th2 cells activation are major features of various allergic diseases. Sohamhyoong-tang has been reported to have anti-inflammatory and antibacterial effects. In this study, we investigated the inhibitory effect of Sohamhyoong-tang extract (SHHTE) on allergic symptoms and inflammatory responses in ovalbumin- (OVA-) sensitized BALB/c mice. The mice were sensitized with OVA and alum at 2-week intervals and then orally given SHHTE for 13 days followed by intradermal OVA injection...
2016: Evidence-based Complementary and Alternative Medicine: ECAM
Ulrike Baranyi, Andreas M Farkas, Karin Hock, Benedikt Mahr, Birgit Linhart, Martina Gattringer, Margit Focke-Tejkl, Arnd Petersen, Fritz Wrba, Thomas Rülicke, Rudolf Valenta, Thomas Wekerle
BACKGROUND: Therapeutic strategies for the prophylaxis of IgE-mediated allergy remain an unmet medical need. Cell therapy is an emerging approach with high potential for preventing and treating immunological diseases. We aimed to develop a cell-based therapy inducing permanent allergen-specific immunological tolerance for preventing IgE-mediated allergy. METHODS: Wild-type mice were treated with allergen-expressing bone marrow cells under a short course of tolerogenic immunosuppression (mTOR inhibition and costimulation blockade)...
May 2016: EBioMedicine
Dimitry A Chistiakov, Alexander N Orekhov, Yuri V Bobryshev
Adaptive immune response plays an important role in atherogenesis. In atherosclerosis, the proinflammatory immune response driven by Th1 is predominant but the anti-inflammatory response mediated mainly by regulatory T cells is also present. The role of Th2 and Th17 cells in atherogenesis is still debated. In the plaque, other T helper cells can be observed such as Th9 and Th22 but is little is known about their impact in atherosclerosis. Heterogeneity of CD4(+) T cell subsets presented in the plaque may suggest for plasticity of T cell that can switch the phenotype dependening on the local microenvironment and activating/blocking stimuli...
September 2016: Immunobiology
Mohamed G Elsakkar, Olla A Sharaki, Dina M Abdallah, Dalia K Mostafa, Fadia T Shekondali
Asthma is a chronic inflammatory heterogeneous disorder initiated by a dysregulated immune response which drives disease development in susceptible individuals. Though T helper 2 (TH2) biased responses are usually linked to eosinophilic asthma, other Th cell subsets induce neutrophilic airway inflammation which provokes the most severe asthmatic phenotypes. A growing evidence highlights the role of T regulatory (Treg) cells in damping abnormal Th responses and thus inhibiting allergy and asthma. Therefore, strategies to induce or augment Treg cells hold promise for treatment and prevention of allergic airway inflammation...
September 5, 2016: European Journal of Pharmacology
Jessica Harakal, Claudia Rival, Hui Qiao, Kenneth S Tung
Pernicious anemia and gastric carcinoma are serious sequelae of autoimmune gastritis (AIG). Our study indicates that in adult C57BL/6-DEREG mice expressing a transgenic diphtheria toxin receptor under the Foxp3 promoter, transient regulatory T cell (Treg) depletion results in long-lasting AIG associated with both H(+)K(+)ATPase and intrinsic factor autoantibody responses. Although functional Tregs emerge over time during AIG occurrence, the effector T cells rapidly become less susceptible to Treg-mediated suppression...
July 1, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
Mudnakudu Nagaraju Kiran Kumar, Chang Zhou, Mei X Wu
Allergen specific immunotherapy has been shown to be the only effective treatment for long-lasting clinical benefit to IgE-mediated allergic diseases, but a fewer than 5% of patients choose the treatment because of inconvenience and a high risk of anaphylaxis. Recently, epicutaneous allergen-specific immunotherapy (EPIT) has proven effective, yet with limitations owing to strong skin reactions. We demonstrate here safer and faster EPIT, named μEPIT, by delivering powdered allergen and adjuvants into many micropores in the epidermis...
August 10, 2016: Journal of Controlled Release: Official Journal of the Controlled Release Society
Linlin Wang, Huanying Wan, Wei Tang, Yingmeng Ni, Xiaoxia Hou, Lina Pan, Yuanlin Song, Guochao Shi
INTRODUCTION: Deficiency of Treg cells and hyperactivity of Th17 cells together are involved in the immunological pathogenesis of asthma. The adenosine A2AR plays a critical role in the increased Foxp3 expression of Treg cells and the decreased Th17 generation. OBJECTIVE: The study aimed to investigate A2AR expression in peripheral blood and its regulatory effect on balance of Treg/Th17 cells in asthma. METHODS: 31 patients with chronic persistent asthma were recruited and divided into 18 intermittent to mild asthma patients, 13 moderate to severe asthma patients...
May 23, 2016: Clinical Respiratory Journal
Tamara Vorobjova, Krista Ress, Katrin Luts, Oivi Uibo, Raivo Uibo
In the present study we aimed to evaluate the impact of langerin (CD207)+ dendritic cells (DCs) and FOXP3+ Treg cells in the intestinal mucosa of children with celiac disease (CD) and atopic dermatitis (AD) in comparison to children with functional gastrointestinal disorders (FGD). Seventy-five children (37 male, mean age 8.4 ± 4.8 years), who randomly underwent small bowel biopsy, were studied. The CD was diagnosed in 14 children, including five persons with concomitant AD (all positive for anti-tissue transglutaminase IgA antibodies and with small bowel atrophy)...
August 2016: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
Qing-Mei Liu, Yang Yang, Soheila J Maleki, Marcos Alcocer, Sha-Sha Xu, Chao-Lan Shi, Min-Jie Cao, Guang-Ming Liu
Polysaccharides from Gracilaria lemaneiformis in particular possess various bioactive functions, but their antiallergic activity remains incompletely defined. Sulfated polysaccharide from Gracilaria lemaneiformis (GLSP) was obtained by water extraction and ethanol precipitation followed by column chromatography. BALB/c mice, RBL-2H3, and KU812 cells were used for verifying the anti food allergic activity of GLSP. According to the results of mice experiment, GLSP was able to alleviate allergy symptoms, to reduce TM-specific IgE and IgG1, to suppress Th2 cell polarization, and to promote the function of regulatory T (Treg) cells...
June 8, 2016: Journal of Agricultural and Food Chemistry
Chu-Lun Lin, George Hsiao, Ching-Chiung Wang, Yueh-Lun Lee
Imperatorin is a furanocoumarin compound which exists in many medicinal herbs and possesses various biological activities. Herein, we investigated the antiallergic effects of imperatorin in asthmatic mice and explored the immunomodulatory actions of imperatorin on immune cells. We used a murine model of ovalbumin (OVA)-induced asthma to evaluate the therapeutic potential of imperatorin. Additionally, bone marrow-derived dendritic cells (DCs; BMDCs) were used to clarify whether imperatorin exerts an antiallergic effect through altering the ability of DCs to regulate T cells...
August 2016: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
Sofía Sirvent, Irene Soria, Cristina Cirauqui, Bárbara Cases, Ana I Manzano, Carmen M Diez-Rivero, Pedro A Reche, Juan López-Relaño, Eduardo Martínez-Naves, F Javier Cañada, Jesús Jiménez-Barbero, Javier Subiza, Miguel Casanovas, Enrique Fernández-Caldas, José Luis Subiza, Oscar Palomares
BACKGROUND: Allergen immunotherapy (AIT) is the only curative treatment for allergy. AIT faces pitfalls related to efficacy, security, duration, and patient compliance. Novel vaccines overcoming such inconveniences are in demand. OBJECTIVES: We sought to study the immunologic mechanisms of action for novel vaccines targeting dendritic cells (DCs) generated by coupling glutaraldehyde-polymerized grass pollen allergoids to nonoxidized mannan (PM) compared with glutaraldehyde-polymerized allergoids (P) or native grass pollen extracts (N)...
August 2016: Journal of Allergy and Clinical Immunology
Tayseer Elamin Mohamed Elfaki, Kathrin Arndts, Anna Wiszniewsky, Manuel Ritter, Ibtisam A Goreish, Misk El Yemen A Atti El Mekki, Sandra Arriens, Kenneth Pfarr, Rolf Fimmers, Mike Doenhoff, Achim Hoerauf, Laura E Layland
BACKGROUND: In the Sudan, Schistosoma mansoni infections are a major cause of morbidity in school-aged children and infection rates are associated with available clean water sources. During infection, immune responses pass through a Th1 followed by Th2 and Treg phases and patterns can relate to different stages of infection or immunity. METHODOLOGY: This retrospective study evaluated immunoepidemiological aspects in 234 individuals (range 4-85 years old) from Kassala and Khartoum states in 2011...
May 2016: PLoS Neglected Tropical Diseases
Sigridur Jonsdottir, Vilhjalmur Svansson, Sara Bjork Stefansdottir, Gertraud Schüpbach, Claudio Rhyner, Eliane Marti, Sigurbjorg Torsteinsdottir
Insect bite hypersensitivity (IBH) is an IgE-mediated dermatitis of horses caused by bites of Culicoides insects, not indigenous to Iceland. Horses born in Iceland and exported to Culicoides-rich areas are frequently affected with IBH. The aims of the study were to compare immunization with recombinant allergens using the adjuvant aluminum hydroxide (Alum) alone or combined with monophosphoryl lipid A (MPLA) for development of a preventive immunization against IBH. Twelve healthy Icelandic horses were vaccinated intralymphatically three times with 10 μg each of four recombinant Culicoides nubeculosus allergens in Alum or in Alum/MPLA...
April 2016: Veterinary Immunology and Immunopathology
Anchoju Vijayendra Chary, Rajkumar Hemalatha, Machiraju Vasudeva Murali, Dodle Jayaprakash, Bharathraj Dinesh Kumar
BACKGROUND: Children with asthma have low vitamin D levels; however, we do not know whether low vitamin D is associated with impaired T-regulatory (Treg) cell population or high IgE receptors (CD23 and CD21) on B cells. OBJECTIVE: To examine Treg cell function, CD23 and CD21 receptors, vitamin D, and vitamin D-regulating enzymes in children with asthma. METHODS: Sixty children (2-6 years old) with asthma and 60 age-matched healthy children were selected as study participants...
May 2016: Annals of Allergy, Asthma & Immunology
Khiyam Hussain, Darren P Letley, A Borgel Greenaway, Rupert Kenefeck, Jody A Winter, William Tomlinson, Joanne Rhead, Emily Staples, Kazuyo Kaneko, John C Atherton, Karen Robinson
Helicobacter pylori infections are usually established in early childhood and continuously stimulate immunity, including T-helper 1 (Th1), Th17, and regulatory T-cell (Treg) responses, throughout life. Although known to be the major cause of peptic ulcer disease and gastric cancer, disease occurs in a minority of those who are infected. Recently, there has been much interest in beneficial effects arising from infection with this pathogen. Published data robustly show that the infection is protective against asthma in mouse models...
2016: Frontiers in Immunology
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