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House dust mite

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https://www.readbyqxmd.com/read/28741705/house-dust-mites-as-potential-carriers-for-ige-sensitisation-to-bacterial-antigens
#1
Sheron Dzoro, Irene Mittermann, Yvonne Resch, Susanne Vrtala, Marion Nehr, Alexander M Hirschl, Gustav Wikberg, Lena Lundeberg, Catharina Johansson, Annika Scheynius, Rudolf Valenta
BACKGROUND: IgE-reactivity to antigens from gram-positive and negative bacteria is common in patients suffering from respiratory and skin manifestations of allergy, but the routes and mechanisms of sensitisation are not fully understood. The analysis of the genome, transcriptome and microbiome of house dust mites (HDM) has shown that S. aureus and E. coli species are abundant bacteria within the HDM microbiome. Therefore, our aim was to investigate if HDM are carriers of bacterial antigens leading to IgE sensitisation in patients suffering from atopic dermatitis...
July 25, 2017: Allergy
https://www.readbyqxmd.com/read/28740493/impact-of-enhancer-of-zeste-homolog-2-on-t-helper-cell-mediated-allergic-rhinitis
#2
Tsung-Yun Hou, Ming-Rong Chen, Yu-Ching Chou, Po-Chieh Kan, Yi-Ta Tsai, Tai-Lung Cha
Enhancer of zeste homolog 2 (Ezh2) has been shown to play a role in the differentiation of T helper (Th) 1 and 2 cells in mice studies using Ezh2-deficient T cells. However, the results have been inconsistent, and the function of Ezh2 in human Th1 and Th2 cell differentiation and its association with disease remains controversial. We measured the expression of Ezh2 in Th1 and Th2 cells in peripheral blood mononuclear cells after acute challenge with house dust mite using flow cytometry in patients with allergic rhinitis (AR) and controls...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28740386/quantum-dots-based-lateral-flow-immunoassay-combined-with-image-analysis-for-semiquantitative-detection-of-ige-antibody-to-mite
#3
Yan Zhao, Qiang Zhang, Qingfeng Meng, Fenglian Wu, Lihua Zhang, Yao Tang, Yuanyuan Guan, Lixin An
Semiquantitative and rapid detection of specific IgE (sIgE) with well clinical relevance to house dust mite (HDM) are promising for prevalence rhinitis and asthma patients due to the increasing air pollution. However, the conventional IgE measurement systems are time-consuming, complicated and require special instruments. Herein, we overcome the above limitations of sIgE to HDM detection system by developing a quantum dot nanobeads-based lateral flow immunoassay and an image analysis procedure. The proposed detection system could semiquantitatively measure the IgE in a linear range of 0...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28732432/intradermal-skin-testing-in-allergic-rhinitis-and-asthma-with-negative-skin-prick-tests
#4
Fuat Erel, Nurhan Sarioglu, Mehmet Kose, Mustafa Kaymakci, Mucahide Gokcen, Ahmet Hamdi Kepekci, Mehmet Arslan
Taking medical history, physical examination, and performing some in vivo and in vitro tests are necessary for the diagnosis of allergy. Skin prick test (SPT) is considered as the standard method and first-line approach for the detection of allergic sensitization. Although mainly SPT is used for the detection of allergic sensitization, intradermal skin test (IDST) may be necessary, especially in patients with a negative SPT result. IDST is quite safe; however, is nowadays seldom used for detection of inhalant allergy and its value remains controversial...
June 2017: Iranian Journal of Allergy, Asthma, and Immunology
https://www.readbyqxmd.com/read/28729042/effects-of-%C3%AE-blockers-on-house-dust-mite-driven-murine-models-pre-and-post-development-of-an-asthma-phenotype
#5
Radhika Joshi, Daniel Valdez, Hosu Kim, Douglas C Eikenburg, Brian J Knoll, Richard A Bond
BACKGROUND: Our previous studies suggested certain β-adrenoceptor blockers (β-blockers) attenuate the asthma phenotype in ovalbumin driven murine models of asthma. However, the ovalbumin model has been criticized for lack of clinical relevance. METHODS: We tested the non-selective β-blockers, carvedilol and nadolol, in house dust mite (HDM) driven murine asthma models where drugs were administered both pre- and post-development of the asthma phenotype. We measured inflammation, mucous metaplasia, and airway hyper-responsiveness (AHR)...
July 17, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28724400/detection-of-il-9-producing-t-cells-in-the-pbmcs-of-allergic-asthmatic-patients
#6
Lei Jia, Ying Wang, Jiangping Li, Sha Li, Yannan Zhang, Juan Shen, Weiping Tan, Changyou Wu
BACKGROUND: Interleukin-9 (IL-9) was reported as an active participant in the pathogenesis of allergic asthma. This study aimed to investigate the major source ofIL-9 and its effect on interferon γ (IFN-γ) and immunoglobulin (Ig) secretion by B cells. METHODS: We isolated peripheral blood mononuclear cells from children with allergic asthma and healthy children. IL-9, IL-4 and IFN-γ expression were detected by ELISA, ELISpot and Flowcytometry. Expression of transcription factor PU...
July 19, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28722633/characterization-of-sarcoptes-scabiei-tropomyosin-and-paramyosin-immunoreactive-allergens-in-scabies
#7
Shumaila Naz, Marion Desclozeaux, Kate E Mounsey, Farhana Riaz Chaudhry, Shelley Walton
Scabies is a human skin disease due to the burrowing ectoparasite Sarcoptes scabiei var. hominis resulting in intense itching and inflammation and manifesting as a skin allergy. Because of insufficient mite material and lack of in vitro propagation system for antigen preparation, scabies is a challenging disease to develop serological diagnostics. For allergen characterization, full-length S. scabiei tropomyosin (Sar s 10) was cloned, expressed in pET-15b, and assessed for reactivity with IgE antibodies from human sera...
July 10, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28716863/opposing-regulation-and-roles-for-phd3-in-lung-dendritic-cells-and-alveolar-macrophages
#8
Simon J Tavernier, Nele Vanlangenakker, Jessica Vetters, Peter Carmeliet, Sophie Janssens, Bart N Lambrecht
The prolyl hydroxylase domain-containing enzymes (PHDs) are important metabolic sensors of the cell and its environment, which might be employed to alert cells of the immune system. These enzymes regulate the expression of the hypoxia inducible factor (HIF) isoforms and NF-κB, crucial transcription factors controlling cellular metabolism and inflammation. PHD/HIF signaling is activated in the allergic lung and is proposed as a potential druggable pathway. Here, we investigated the regulation and role of the PHD isoforms in CD11c-expressing dendritic cells (DCs) and macrophages (Mϕ), sensors of the environment and crucial antigen-presenting cells in the pathogenesis of asthma...
July 17, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28716804/type-i-interferon-is-required-for-t-helper-th-2-induction-by-dendritic-cells
#9
Lauren M Webb, Rachel J Lundie, Jessica G Borger, Sheila L Brown, Lisa M Connor, Adam Nr Cartwright, Annette M Dougall, Ruud Hp Wilbers, Peter C Cook, Lucy H Jackson-Jones, Alexander T Phythian-Adams, Cecilia Johansson, Daniel M Davis, Benjamin G Dewals, Franca Ronchese, Andrew S MacDonald
Type 2 inflammation is a defining feature of infection with parasitic worms (helminths), as well as being responsible for widespread suffering in allergies. However, the precise mechanisms involved in T helper (Th) 2 polarization by dendritic cells (DCs) are currently unclear. We have identified a previously unrecognized role for type I IFN (IFN-I) in enabling this process. An IFN-I signature was evident in DCs responding to the helminth Schistosoma mansoni or the allergen house dust mite (HDM). Further, IFN-I signaling was required for optimal DC phenotypic activation in response to helminth antigen (Ag), and efficient migration to, and localization with, T cells in the draining lymph node (dLN)...
July 17, 2017: EMBO Journal
https://www.readbyqxmd.com/read/28716168/a-randomized-double-blind-placebo-controlled-trial-of-sublingual-immunotherapy-with-house-dust-mite-extract-for-allergic-rhinitis
#10
Yu Guo, Yanqing Li, Dehui Wang, Quan Liu, Zhuofu Liu, Li Hu
OBJECTIVE: This study was designed to evaluate the efficacy and safety of sublingual immunotherapy (SLIT) with house-dust mite (HDM) extract in Chinese patients with HDM-induced allergic rhinitis (AR). METHODS: A randomized, double-blind, placebo controlled trial was conducted with the outpatients of the Eye, Ear, Nose, and Throat Hospital, Fudan University. Forty-eight patients were eligible for randomization to SLIT with a mixture of Dermatophagoides pteronyssinus and Dermatophagoides farinae extract or placebo for 1 year...
July 1, 2017: American Journal of Rhinology & Allergy
https://www.readbyqxmd.com/read/28713373/15-deoxy-delta-12-14-prostaglandin-j2-inhibits-lung-inflammation-and-remodeling-in-distinct-murine-models-of-asthma
#11
Diego S Coutinho, Edna A Anjos-Valotta, Caio V M F do Nascimento, Ana Lucia A Pires, Marcelo H Napimoga, Vinícius F Carvalho, Rafael C Torres, Patrícia M R E Silva, Marco A Martins
15-deoxy-Δ-12,14-prostaglandin J2 (15d-PGJ2) has been described as an anti-inflammatory lipid mediator in several in vitro and in vivo studies, but its effect on allergic pulmonary inflammation remains elusive. The aim of this study was to investigate the therapeutic potential of 15d-PGJ2 based on distinct murine models of allergic asthma triggered by either ovalbumin (OVA) or house dust mite extract (HDM). Characteristics of lung inflammation, airway hyper-reactivity (AHR), mucus exacerbation, and lung remodeling in sensitized A/J mice treated or not with 15d-PGJ2 were assessed...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28702111/innate-function-of-house-dust-mite-allergens-robust-enzymatic-degradation-of-extracellular-matrix-at-elevated-ph
#12
Kumiko Oida, Lukas Einhorn, Ina Herrmann, Lucia Panakova, Yvonne Resch, Susanne Vrtala, Gerlinde Hofstetter, Akane Tanaka, Hiroshi Matsuda, Erika Jensen-Jarolim
BACKGROUND: Exposure to the house dust mite Dermatophagoides pteronyssinus (D.p.) increases the risk for developing allergic diseases in humans and their best friends, the dogs. Here, we explored whether this allergenic mite via its enzymes may impact the cutaneous extracellular matrix (ECM), which critically determines epithelial barrier integrity both structurally and functionally. METHODS: Two extracts obtained from either dust-purified or cultured D.p. bodies were used in the present study...
2017: World Allergy Organization Journal
https://www.readbyqxmd.com/read/28700253/house-dust-mite-induced-allergic-airway-disease-is-independent-of-ige-and-fc%C3%A9-ri%C3%AE
#13
Christopher G McKnight, Joseph A Jude, Zhenqi Zhu, Reynold A Panettieri, Fred D Finkelman
IgE contributes to disease exacerbations but not to baseline airway hyperresponsiveness (AHR) in human asthma. In rodent allergic airway disease (AAD), mast cell and IgE dependence for the induction of AHR has only been observed when mice are immunized with a relatively weak allergen without adjuvant. To evaluate the role of IgE in murine AAD that is induced by a potent allergen, we inoculated BALB/c and FVB/N background wild-type, and IgE- or FcεRIα-deficient mice intratracheally with large or limiting doses of house dust mite extract (HDM) and evaluated AHR, pulmonary eosinophilia, goblet cell metaplasia, serum IgE, and lung mastocytosis...
July 12, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28698512/eco-friendly-acaricidal-effects-of-nylon-66-nanofibers-via-grafted-clove-bud-oil-loaded-capsules-on-house-dust-mites
#14
Joo Ran Kim, Seong Hun Kim
Acaricidal nylon 66 fabrics (AN66Fs) grafted with clove oil-loaded microcapsules (COMCs) were developed against Dermatophagoides farina (D. gallinae). The average diameter was about 2.9 µm with a range of 100 nm-8.5 µm. COMCs carried clove oil loading of about 65 vol %. COMCs were chemically grafted to electrospun nylon nanofibers by the chemical reactions between -OH groups of COMCs and -COOH end groups of nylon fabrics to form ester linkages. AN66Fs had an effect on D. farinae depending on COMCs loadings...
July 10, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28697661/safety-of-a-proteoliposome-from-neisseria-meningitides-as-adjuvant-for-a-house-dust-mite-allergy-vaccine
#15
Wendy Ramírez, Virgilio Bourg, Damaris Torralba, Elisa Facenda, Beatriz Tamargo, Bárbara O González, Gustavo Sierra, Oliver Pérez, Yordanis Perez-Llano, Alexis Labrada
The proteoliposome (PL) of Neisseria meningitidis serogroup B has been reported as a safe and potent vaccine adjuvant, inducing a TH1-skewed response. The present study describes a pre-clinical safety evaluation of an allergy therapeutic vaccine candidate based on purified allergens from Dermatophagoides siboney house dust mite and PL as adjuvant, both components adsorbed onto aluminum hydroxide gel. Two separate studies of acute toxicity evaluation were performed in mice and rabbits, and two repeat-dose studies were conducted in non-sensitized and allergen-sensitized Balb/c mice, respectively...
December 2017: Journal of Immunotoxicology
https://www.readbyqxmd.com/read/28693928/the-different-modes-of-binding-of-the-dust-mite-allergens-der-f-7-and-der-p-7-on-a-monoclonal-antibody-wh9-contribute-to-the-differential-reactivity
#16
Hsiao-Yun Tai, Jia-Kai Zhou, Chang-Ching Yeh, Ming F Tam, Sheh-Yi Sheu, Horng-Der Shen
BACKGROUND: Der f 7 and Der p 7 are important house dust mite allergens. An IgE-binding inhibition monoclonal antibody WH9 reacts ten folds stronger against Der p 7 than to Der f 7. The purpose of this study is to identify the antigenic determinant(s) and the structural basis of Der f 7 recognize by WH9. METHODS: WH9-reactive determinant(s) on Der f 7 was identified by immunoblot and immunoblot inhibition. The 3-D binary complex structures of WH9 and the group 7 allergens were simulated with homology modeling and docking methods...
June 28, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28692122/alteration-of-656-g-t-and-607-c-a-polymorphisms-in-interleukin-18-il-18-gene-in-house-dust-mite-sensitive-allergic-rhinitis-patients-in-thailand
#17
A Tungtrongchitr, J Jumpasri, N Sookrung, N Visitsunthorn, P Tantilipikorn, O Piboonpocanan, N Indrawattana, R Tungtrongchitr, W Chaicumpa
Allergic rhinitis (AR) is an IgE-mediated inflammation of the nasal membranes, which is naturally triggered by aeroallergens. House dust mites (HDM) are the most common inhalant allergens. Interleukin-18 (IL-18) has been established as an essential cytokine that can activate the generation of IgE. This randomized controlled study aimed to identify the possible relationship of the genetic variations in the IL-18 gene with AR in mite-sensitive Thai patients. Study subjects consisted of 150 AR patients and 50 normal participants...
July 6, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28687462/the-effect-of-tiotropium-in-combination-with-olodaterol-on-house-dust-mite-induced-allergic-airway-disease
#18
Gerrit John-Schuster, Stan de Kleijn, Yolanda van Wijck, Veerle Kremer, Hermelijn H Smits, Michael P Pieper, Pieter S Hiemstra, Christian Taube
One of the major goals of asthma therapy is to maintain asthma control and prevent acute exacerbations. Long-acting bronchodilators are regularly used for the treatment of asthma patients and in clinical studies the anti-cholinergic tiotropium has recently been shown to reduce exacerbations in patients with asthma. So far it is unclear how tiotropium exerts this effect. For this purpose, we designed an allergen-driven rechallenge model of allergic airway inflammation in mice, to assess the effectiveness of tiotropium and the long-acting β-2 adrenoceptor agonist olodaterol on allergen-induced exacerbations of airway disease...
July 4, 2017: Pulmonary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28687424/identification-by-serological-proteome-analysis-of-paramyosin-as-prominent-allergen-in-dust-mite-allergy
#19
Antonio Conti, Giulia Burastero, Claudia Suli, Srinita Banerjee, Susanne Vrtala, Massimo Alessio, Samuele E Burastero
Component-resolved diagnosis (CRD) of IgE-mediated hypersensitivities is challenged by the possibility that single patients are sensitized to components not commercially available to the clinical lab. Here, we studied a patient with positive extract-based diagnosis of house dust mite (HDM) allergy based on routine in vivo (prick test) and in vitro (serum specific IgE) tests, whose serum scored negative for IgE to the three recombinant allergens routinely used in CRD (group 1 allergens, group 2 allergens and tropomyosin)...
July 4, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28684329/house-dust-mite-increases-pro-th2-cytokines-il-25-and-il-33-via-the-activation-of-tlr1-6-signaling
#20
Yong Hyun Jang, Jin Kyeong Choi, Meiling Jin, Young-Ae Choi, Zae Young Ryoo, Hyun-Shik Lee, Pil-Hoon Park, Sun-Uk Kim, Taeg Kyu Kwon, Myoung Ho Jang, Sin-Hyeog Im, Sun Young Moon, Weon Ju Lee, Seok-Jong Lee, Do Won Kim, Sang-Hyun Kim
House dust mite (HDM) has been implicated in the etiology and exacerbation of atopic dermatitis (AD). Diverse factors contribute to HDM allergenicity through the activation of innate immunity. We investigated whether Dermatophagoides farinae extract (DFE) allergens mediate innate immune activation through specific Toll-like receptors (TLRs) in epidermal keratinocytes, DFE-induced murine AD model and human AD lesions. DFE activated the expression of TLR1, TLR6, interleukin (IL)-25, and IL-33 in human primary keratinocytes and HaCaT cells...
July 3, 2017: Journal of Investigative Dermatology
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