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nasal allergen challenge

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https://www.readbyqxmd.com/read/28423590/neutralization-of-interleukin-17-suppresses-allergic-rhinitis-symptoms-by-downregulating-th2-and-th17-responses-and-upregulating-the-treg-response
#1
Zhao Wei Gu, Yun Xiu Wang, Zhi Wei Cao
Allergic rhinitis (AR) has long been considered to predominantly involve the actions of Th2 cells, with relatively small contributions from Th1 cells. In recent years, the discovery of Th17 and regulatory T (Treg) cells has rendered the Th1/Th2 balance paradigm more complex and expanded our understanding of the pathogenesis of AR. IL-17, a key cytokine produced by Th17 cells, is known to induce allergen-specific Th2 cell activation, eosinophil and neutrophil accumulation, and serum IgE production in asthma; all of these features may play important roles in AR...
April 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28392402/does-seasonal-allergic-rhinitis-increase-sensitivity-to-ammonia-exposure
#2
Marlene Pacharra, Stefan Kleinbeck, Michael Schäper, Meinolf Blaszkewicz, Klaus Golka, Christoph van Thriel
Allergic inflammation in the upper airways represents a wide-spread health issue: Little is known about whether it increases sensitivity to airborne chemicals thereby challenging established exposure limits that neglect such differences in susceptibility. To investigate the role of pre-existing allergic inflammation, 19 subjects with seasonal allergic rhinitis (SAR) and 18 control subjects with low risk of sensitization were exposed for 4h to ammonia in two concentrations (cross-over design): 2.5ppm (odor threshold) and 0-40ppm (occupational exposure limit: 20ppm TWA)...
April 2, 2017: International Journal of Hygiene and Environmental Health
https://www.readbyqxmd.com/read/28332605/janus-faced-acrolein-prevents-allergy-but-accelerates-tumor-growth-by-promoting-immunoregulatory-foxp3-cells-mouse-model-for-passive-respiratory-exposure
#3
Franziska Roth-Walter, Cornelia Bergmayr, Sarah Meitz, Stefan Buchleitner, Caroline Stremnitzer, Judit Fazekas, Anna Moskovskich, Mario A Müller, Georg A Roth, Krisztina Manzano-Szalai, Zdenek Dvorak, Alina Neunkirchner, Erika Jensen-Jarolim
Acrolein, a highly reactive unsaturated aldehyde, is generated in large amounts during smoking and is best known for its genotoxic capacity. Here, we aimed to assess whether acrolein at concentrations relevant for smokers may also exert immunomodulatory effects that could be relevant in allergy or cancer. In a BALB/c allergy model repeated nasal exposure to acrolein abrogated allergen-specific antibody and cytokine formation, and led to a relative accumulation of regulatory T cells in the lungs. Only the acrolein-treated mice were protected from bronchial hyperreactivity as well as from anaphylactic reactions upon challenge with the specific allergen...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28293930/anti-interleukin-9-antibody-increases-the-effect-of-allergen-specific-immunotherapy-in-murine-allergic-rhinitis
#4
Ji Hyeon Shin, Do Hyun Kim, Boo Young Kim, Sung Won Kim, Se Hwan Hwang, Joohyung Lee, Soo Whan Kim
PURPOSE: Interleukin (IL)-9 induces allergic responses; however, the roles of anti-IL-9 antibody in the induction of tolerance remain unclear. This study investigated the effects of anti-IL-9 antibody on oral tolerance (OT) in a mouse model of allergic rhinitis (AR). METHODS: BALB/c mice were divided into 4 groups: the control, AR, OT, and OT with anti-IL-9 antibody (OT+IL9AB) groups. Ovalbumin (OVA) was used for sensitization and challenge. Mice in the OT and OT+IL9AB groups were fed OVA for immunotherapy...
May 2017: Allergy, Asthma & Immunology Research
https://www.readbyqxmd.com/read/28284536/specificity-and-reproducibility-of-nasal-biomarkers-in-patients-with-allergic-rhinitis-after-allergen-challenge-chamber-exposure
#5
Philipp Badorrek, Meike Müller, Wolfgang Koch, Jens M Hohlfeld, Norbert Krug
BACKGROUND: Allergic rhinitis is an inflammatory disease that causes cellular influx and mediator release in the nose. These inflammatory changes might be used as nasal biomarkers to assess the efficacy of novel anti-allergic treatments. OBJECTIVE: To assess the specificity and reproducibility of nasal biomarkers in patients with allergic rhinitis after grass pollen exposure in an allergen challenge chamber. METHODS: In a monocenter pilot study, 15 patients with allergic rhinitis and 19 healthy individuals underwent two 4-hour Dactylis glomerate pollen challenges in the challenge chamber with an interval of 21 days...
March 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28275474/effects-of-leukotriene-d4-nasal-challenge-on-bronchial-responsiveness-and-inflammation-in-asthmatic-patients-with-allergic-rhinitis
#6
Zheng Zhu, Yanqing Xie, Weijie Guan, Yi Gao, Rongquan Huang, Shu Xia, Wenhua Jian, Zhiyu Liang, Jinping Zheng
BACKGROUND: In asthmatic patients with allergic rhinitis (AR), increased cysteinyl leukotrienes (CysLTs) production in the secretion of nasal mucosa has been associated with greater bronchial hyperresponsiveness (BHR) after nasal allergen challenge. However, the role of CysLTs in eliciting BHR after nasal allergen challenge has not been evaluated. The aim of this study is to evaluate the effect of LTD4 nasal challenge on BHR and inflammation in asthmatic patients with AR. METHODS: In this self-controlled study, fifteen eligible consecutively recruited subjects underwent methacholine (Mch) bronchial provocation test before and 30 minutes after LTD4 nasal provocation test...
February 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28238743/clinical-validation-of-a-house-dust-mite-environmental-challenge-chamber-model
#7
P Zieglmayer, P Lemell, K W Chen, R Schmutz, R Zieglmayer, O Pfaar, F Horak, S Vrtala
Mite allergy causes significant socioeconomic burden. Environmental allergen exposure can be difficult to assess, and topical challenge offers limited value. In our investigation we evaluated a challenge chamber system in terms of correlation between mite allergen concentration and rhinitis symptoms, retest reproducibility as well as inter chamber variability. Data was obtained from adult mite allergic subjects from 4 different studies. Total nasal symptom score (TNSS) data was analysed for dose finding. TNSS and active anterior rhinomanometry (RMM) data was analyzed for retest reproducibility and inter chamber variability...
February 23, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28196255/effect-of-2-years-of-treatment-with-sublingual-grass-pollen-immunotherapy-on-nasal-response-to-allergen-challenge-at-3-years-among-patients-with-moderate-to-severe-seasonal-allergic-rhinitis-the-grass-randomized-clinical-trial
#8
RANDOMIZED CONTROLLED TRIAL
Guy W Scadding, Moises A Calderon, Mohamed H Shamji, Aarif O Eifan, Martin Penagos, Florentina Dumitru, Michelle L Sever, Henry T Bahnson, Kaitie Lawson, Kristina M Harris, Audrey G Plough, Joy Laurienzo Panza, Tielin Qin, Noha Lim, Nadia K Tchao, Alkis Togias, Stephen R Durham
Importance: Sublingual immunotherapy and subcutaneous immunotherapy are effective in seasonal allergic rhinitis. Three years of continuous treatment with subcutaneous immunotherapy and sublingual immunotherapy has been shown to improve symptoms for at least 2 years following discontinuation of treatment. Objective: To assess whether 2 years of treatment with grass pollen sublingual immunotherapy, compared with placebo, provides improved nasal response to allergen challenge at 3-year follow-up...
February 14, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28139053/anti-inflammatory-effects-of-the-petasin-phyto-drug-ze339-are-mediated-by-inhibition-of-the-stat-pathway
#9
Sabrina A Steiert, Ulrich M Zissler, Adam M Chaker, Julia Esser-von-Bieren, Daniela Dittlein, Ferdinand Guerth, Constanze A Jakwerth, Guido Piontek, Catherine Zahner, Juergen Drewe, Claudia Traidl-Hoffmann, Carsten B Schmidt-Weber, Stefanie Gilles
Ze339, an herbal extract from Petasites hybridus leaves is effective in treatment of allergic rhinitis by inhibition of a local production of IL-8 and eicosanoid LTB4 in allergen-challenged patients. However, the mechanism of action and anti-inflammatory potential in virally induced exacerbation of the upper airways is unknown. This study investigates the anti-inflammatory mechanisms of Ze339 on primary human nasal epithelial cells (HNECs) upon viral, bacterial and pro-inflammatory triggers. To investigate the influence of viral and bacterial infections on the airways, HNECs were stimulated with viral mimics, bacterial toll-like-receptor (TLR)-ligands or cytokines, in presence or absence of Ze339...
January 31, 2017: BioFactors
https://www.readbyqxmd.com/read/28094875/neuroendocrinology-of-mast-cells-challenges-and-controversies
#10
REVIEW
Theoharis C Theoharides
Mast cells (MC) are hemotopoietically derived tissue immune cells that are ubiquitous in the body, including neuroendocrine organs such as the hypothalamus, pineal, pituitary, ovaries, pancreas and uterus where their action is not well understood. Mast cells have historically been associated with allergies because of their rich content of histamine and tryptase, but more recently with regulation of immunity and inflammation due to their synthesis and release of numerous cytokines and chemokines. Mast cells are located perivascularly and express numerous receptors for diverse ligands such as allergens, pathogens, neurotransmitters, neuropeptides and hormones including acetylcholine, calcitonin gene-related peptide (CGRP), corticosteroids, corticotropin-releasing hormone (CRH), β-endorphin, epinephrine, 17β-oestradiol, gonadotrophins, hemokinin-A (HKA), leptin, melatonin, neurotensin (NT), parathyroid hormone (PTH), substance P (SP) and vasoactive intestinal peptide (VIP)...
January 17, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/28073613/effect-of-nasal-allergen-challenge-in-allergic-rhinitis-on-mitochondrial-function-of-peripheral-blood-mononuclear-cells
#11
Shanshan Qi, Cindy Barnig, Anne-Laure Charles, Anh Poirot, Alain Meyer, Raphaël Clere-Jehl, Fréderic de Blay, Bernard Geny
No abstract text is available yet for this article.
March 2017: Annals of Allergy, Asthma & Immunology
https://www.readbyqxmd.com/read/28042527/pediatric-rhinosinusitis
#12
Dana T Badr, Jonathan M Gaffin, Wanda Phipatanakul
Rhinosinusitis, is defined as an inflammation of the paranasal and nasal sinus mucosae. Chronic rhinosinusitis (CRS)is a common problem in the pediatric age group and the diagnosis and treatment are challenging due to the chronicity and similarity of symptoms with allergic rhinitis and adenoid hypertrophy. Although it is less common than acute rhinosinusitis, CRS is becoming more frequent and significantly affects the quality of life in children and can substantially impair daily function. CRS is characterized by sinus symptoms lasting more than 3 months despite medical therapy...
September 2016: Current Treatment Options in Allergy
https://www.readbyqxmd.com/read/27993536/neutrophils-are-a-major-source-of-the-epithelial-barrier-disrupting-cytokine-oncostatin-m-in-patients-with-mucosal-airways-disease
#13
Kathryn L Pothoven, James E Norton, Lydia A Suh, Roderick G Carter, Kathleen E Harris, Assel Biyasheva, Kevin Welch, Stephanie Shintani-Smith, David B Conley, Mark C Liu, Atsushi Kato, Pedro C Avila, Qutayba Hamid, Leslie C Grammer, Anju T Peters, Robert C Kern, Bruce K Tan, Robert P Schleimer
BACKGROUND: We have previously shown that oncostatin M (OSM) levels are increased in nasal polyps (NPs) of patients with chronic rhinosinusitis (CRS), as well as in bronchoalveolar lavage fluid, after segmental allergen challenge in allergic asthmatic patients. We also showed in vitro that physiologic levels of OSM impair barrier function in differentiated airway epithelium. OBJECTIVE: We sought to determine which hematopoietic or resident cell type or types were the source of the OSM expressed in patients with mucosal airways disease...
December 18, 2016: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27992712/usefulness-of-allerkin-house-dust-mite-extract-for-nasal-provocation-testing
#14
Kyu-Sung Kim, Tae Young Jang, Young Hyo Kim
Objectives: We evaluated the clinical usefulness of Allerkin (Lofarma) for nasal provocation testing (NPT) in patients with rhinitis symptoms, by examining changes in nasal symptoms and acoustic parameters after exposure to house dust mite (HDM) extract. Methods: Twenty patients (16 males and 4 females, mean age: 29.6±14.6 years) were enrolled. We performed skin prick test (SPT) before and 15 and 30 minutes after intranasal challenge with Allerkin HDM extract, and we evaluated symptom changes (nasal obstruction, rhinorrhea, sneezing, and itching) using a visual analogue scale...
December 20, 2016: Clinical and Experimental Otorhinolaryngology
https://www.readbyqxmd.com/read/27956356/a-standardized-methanol-extract-of-eclipta-prostrata-l-l-asteraceae-reduces-bronchial-hyperresponsiveness-and-production-of-th2-cytokines-in-a-murine-model-of-asthma
#15
Lucas Junqueira de Freitas Morel, Bruna Cestari de Azevedo, Fábio Carmona, Silvia Helena Taleb Contini, Aristônio Magalhães Teles, Fernando Silva Ramalho, Bianca Waléria Bertoni, Suzelei de Castro França, Marcos de Carvalho Borges, Ana Maria Soares Pereira
ETHNOPHARMACOLOGICAL RELEVANCE: Eclipta prostrata (L.) L. (Asteraceae) has been used in Brazilian traditional medicine to treat asthma and other respiratory illnesses. AIMS OF THE STUDY: To investigate the effects of different doses of a standardized extract of E. prostrata using a murine model of allergen induced asthma. MATERIALS AND METHODS: Balb/c mice were sensitized twice with ovalbumin (OVA) administered intraperitoneally and challenged over four alternate days with nasal instillations of OVA solution...
December 9, 2016: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27891156/usefulness-of-component-resolved-analysis-of-cat-allergy-in-routine-clinical-practice
#16
Katharina Eder, Sven Becker, Marion San Nicoló, Alexander Berghaus, Moritz Gröger
BACKGROUND: Cat allergy is of great importance, and its prevalence is increasing worldwide. Cat allergens and house dust mite allergens represent the major indoor allergens; however, they are ubiquitous. Cat sensitization and allergy are known risk factors for rhinitis, bronchial hyperreactivity and asthma. Thus, the diagnosis of sensitization to cats is important for any allergist. METHODS: 70 patients with positive skin prick tests for cats were retrospectively compared regarding their skin prick test results, as well as their specific immunoglobulin E antibody profiles with regard to their responses to the native cat extract, rFel d 1, nFel d 2 and rFel d 4...
2016: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/27852361/-lower-airway-abnormalities-in-patients-with-allergic-rhinitis
#17
J F Ji, Q P Wang, Y Zhang, Z Y Wang, Y Q Xie, W J Guan, K M Wu, L Xu, W Chen, F Xue, M J Jiang, T Y Wang, N S Zhong
Objective: To investigate the characteristics of lower airway abnormalities in allergic rhinitis(AR) patients without asthma. Methods: Between June 2008 and December 2012, 377 consecutive AR patients and 264 healthy subjects were recruited. All subjects underwent meticulous history taking, nasal examination, allergen skin prick test, blood routine test, serum total immunoglobin E assay, induced sputum cell count and differentials, measurement of fractional exhaled nitric oxide (FeNO) and bronchial challenge test...
November 12, 2016: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/27777594/clinical-validation-of-controlled-exposure-to-birch-pollen-in-the-environmental-exposure-unit-eeu
#18
Anne K Ellis, Mena Soliman, Lisa M Steacy, Daniel E Adams, Barnaby Hobsbawn, Terry J B Walker
BACKGROUND: The Environmental Exposure Unit (EEU) in Kingston, Ontario, Canada is a controlled allergen challenge facility (CACF) that has been previously clinically validated for the use of ragweed and grass pollen in clinical studies. In this study we aim to validate the use of birch pollen to challenge allergic participants. METHODS: A total of 59 volunteers were screened and 38 birch allergic participants and ten non-allergics completed the study, outside of tree pollen season...
2016: Allergy, Asthma, and Clinical Immunology
https://www.readbyqxmd.com/read/27773851/intradermal-grass-pollen-immunotherapy-increases-th2-and-ige-responses-and-worsens-respiratory-allergic-symptoms
#19
Anna Slovick, Abdel Douiri, Rachel Muir, Andrea Guerra, Konstantinos Tsioulos, Evie Hay, Emily P S Lam, Joanna Kelly, Janet L Peacock, Sun Ying, Mohamed H Shamji, David J Cousins, Stephen R Durham, Stephen J Till
BACKGROUND: Repeated low-dose grass pollen intradermal allergen injection suppresses allergen-induced cutaneous late-phase responses comparably with conventional subcutaneous and sublingual immunotherapy. OBJECTIVE: We sought to evaluate the efficacy and safety of grass pollen intradermal immunotherapy in the treatment of allergic rhinitis. METHODS: We randomly assigned 93 adults with grass pollen-induced allergic rhinitis to receive 7 preseasonal intradermal allergen injections (containing 7 ng of Phl p 5 major allergen) or a histamine control...
October 20, 2016: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27677865/the-nasal-mucosal-late-allergic-reaction-to-grass-pollen-involves-type-2-inflammation-il-5-and-il-13-the-inflammasome-il-1%C3%AE-and-complement
#20
B R Leaker, V A Malkov, R Mogg, M K Ruddy, G C Nicholson, A J Tan, C Tribouley, G Chen, I De Lepeleire, N A Calder, H Chung, P Lavender, L N Carayannopoulos, T T Hansel
Non-invasive mucosal sampling (nasosorption and nasal curettage) was used following nasal allergen challenge with grass pollen in subjects with allergic rhinitis, in order to define the molecular basis of the late allergic reaction (LAR). It was found that the nasal LAR to grass pollen involves parallel changes in pathways of type 2 inflammation (IL-4, IL-5 and IL-13), inflammasome-related (IL-1β), and complement and circadian-associated genes. A grass pollen nasal spray was given to subjects with hay fever followed by serial sampling, in which cytokines and chemokines were measured in absorbed nasal mucosal lining fluid, and global gene expression (transcriptomics) assessed in nasal mucosal curettage samples...
March 2017: Mucosal Immunology
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