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https://www.readbyqxmd.com/read/28098501/prevalence-of-house-dust-mite-allergens-in-low-income-homes-with-evaporative-coolers-in-a-semi-arid-climate
#1
James D Johnston, Taylor Barney, Justin Crandall, Marinn Brown, Tarah Westover, Sterling Paulson, Madeleine Smith, K Scott Weber
House dust mites are typically absent in homes in arid and semi-arid climates due to low humidity. Evaporative "swamp" cooling significantly increases indoor humidity in dry climates, and is suspected of promoting dust mite survival in these regions. We investigated the prevalence and concentration of mite allergens in dust from low-income homes (n = 22) with evaporative coolers in Utah County, Utah. Overall, 15 (68.2%) homes were positive for either Der p 1 or Der f 1 in at least one location. Geometric mean allergen levels in mattresses were 0...
January 18, 2017: Archives of Environmental & Occupational Health
https://www.readbyqxmd.com/read/28095128/safety-and-benefits-of-inhaled-hypertonic-saline-following-airway-challenges-with-endotoxin-and-allergen-in-asthmatics
#2
Neil E Alexis, William D Bennett, David B Peden
OBJECTIVE: To determine whether induced sputum (IS) with hypertonic saline inhalation is safe to use in asthmatics within 24 hours of two commonly used airway challenges, namely endotoxin and dust mite allergen, and to assess whether IS can enhance mucociliary clearance (MCC) rates in asthmatics. METHODS: IS (three 7 minute inhalation periods of 3, 4, 5% hypertonic saline) was employed before (N = 29) and within 24 hours of inhaled challenges with endotoxin (N = 13) and dust mite allergen (N = 12) in a cohort of mild to moderate asthmatics...
January 17, 2017: Journal of Asthma: Official Journal of the Association for the Care of Asthma
https://www.readbyqxmd.com/read/28093718/ribosomal-protein-s3-gene-silencing-protects-against-experimental-allergic-asthma
#3
Jinrui Dong, Wupeng Liao, Hong Yong Peh, Tze Khee Chan, W S Daniel Tan, Li Li, Amy Yong, W S Fred Wong
BACKGROUND AND PURPOSE: Ribosomal protein S3 (RPS3) is a 40S ribosomal protein of the S3P family essential for executing protein translation. RPS3 has recently been found to interact with the p65 subunit of the NF-κB complex, and promote p65 DNA-binding activity. Persistent activation of the NF-κB pathway is evident in allergic asthma. We hypothesized that gene silencing of lung RPS3 can ameliorate allergic airway inflammation. EXPERIMENTAL APPROACH: Gene silencing efficacy of RPS3 siRNA was screened in three different mouse cell lines by real-time PCR and immunoblotting...
January 17, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/28091681/microbial-rrna-sequencing-analysis-of-evaporative-cooler-indoor-environments-located-in-the-great-basin-desert-region-of-the-united-states
#4
Angela R Lemons, Mary Beth Hogan, Ruth A Gault, Kathleen Holland, Edward Sobek, Kimberly A Olsen-Wilson, Yeonmi Park, Ju-Hyeong Park, Ja Kook Gu, Michael L Kashon, Brett J Green
Recent studies conducted in the Great Basin Desert region of the United States have shown that skin test reactivity to fungal and dust mite allergens are increased in children with asthma or allergy living in homes with evaporative coolers (EC). The objective of this study was to determine if the increased humidity previously reported in EC homes leads to varying microbial populations compared to homes with air conditioners (AC). Children with physician-diagnosed allergic rhinitis living in EC or AC environments were recruited into the study...
January 16, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28089873/patterns-of-immune-development-in-urban-preschoolers-with-recurrent-wheeze-and-or-atopy
#5
James E Gern, Agustin Calatroni, Katy F Jaffee, Henry Lynn, Amy Dresen, William W Cruikshank, Howard M Lederman, Hugh A Sampson, Wayne Shreffler, Leonard B Bacharier, Peter J Gergen, Diane R Gold, Meyer Kattan, George T O'Connor, Megan T Sandel, Robert A Wood, Gordon R Bloomberg
BACKGROUND: Disadvantaged urban children have high rates of allergic diseases and wheezing, which are diseases associated with Type 2-biased immunity. OBJECTIVE: To determine whether environmental exposures in early life influence cytokine responses which affect the development of recurrent wheezing illnesses and allergic sensitization. METHODS: A birth cohort of 560 urban families was recruited from neighborhoods with high rates of poverty, and 467 (83%) children were followed until 3 years of age...
January 13, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28078853/oxidative-stress-in-asthma-a-distinct-clinical-and-pathologic-feature
#6
Y Li, G P Li
Asthma is a type of chronic airway inflammation. Corticosteroids are inadequate for asthma therapy. However, it remains unclear whether oxidative stress is a distinct clinical and pathologic feature in asthma. We reviewed the articles on asthma-associated oxidative stress. The exposures to airborne allergens, such as house dust mite (HDM) and birch pollen, may not only trigger innate and adaptive immune responses but also cause oxidative stress damage in the airways. Allergen-induced reactive oxygen species (ROS) is involved in p38 MAPK, phosphoinositide-3-kinase (PI3K)/Akt and nuclear factor erythroid 2-related factor (Nrf2) kinase pathway signaling...
October 2016: Journal of Biological Regulators and Homeostatic Agents
https://www.readbyqxmd.com/read/28076322/aeroallergen-der-p-2-promotes-motility-of-human-non-small-cell-lung-cancer-cells-via-toll-like-receptor-mediated-up-regulation-of-urokinase-type-plasminogen-activator-and-integrin-focal-adhesion-kinase-signaling
#7
Chun-Hsiang Lin, Hui-Han Lin, Cheng-Yi Kuo, Shao-Hsuan Kao
House dust mite (HDM) allergens are one of the major causes leading to respiratory hypersensitiveness and airway remodeling. Here we hypothesized that a major HDM allergen Der p 2 could increase cell motility and invasiveness of non-small cell lung cancer (NSCLC) cells. Our results showed that low dose (1 and 3 μg/mL) recombinant Der p 2 protein (DP2) enhanced the migration and invasiveness of human NSCLC cell A549, H1299 and CL1-5, but nonsignificantly altered their growth. Further investigation revealed that integrin αV level was increased and its downstream signaling including focal adhesion kinase (FAK) and paxillin were activated in A549 cells exposed to DP2...
January 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28065336/sublingual-immunotherapy-dosing-regimens-what-is-ideal
#8
Jay J Jin, James T Li, Ludger Klimek, Oliver Pfaar
Sublingual immunotherapy (SLIT) is a treatment for allergic respiratory diseases that has demonstrated efficacy and safety. Several formulations of SLIT are now available worldwide for treatment of allergic rhinitis (AR). Grass tablets containing 15 to 25 μg of group 5 major allergen reduced combined AR symptoms and medication use by 23% to 41% in 3 treatment years and 2 follow-up years. Ragweed pollen tablets (12 μg of Ambrosia artemisiifolia 1) and liquid extracts (50 μg of Ambrosia artemisiifolia 1) reduced combined AR symptoms and medication use by 26% and 43%, respectively...
January 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28063044/characterization-of-group-2-innate-lymphoid-cells-in-allergic-airway-inflammation-models-in-the-mouse
#9
Bobby W S Li, Dior M J M Beerens, Maarten D Brem, Rudi W Hendriks
Allergic asthma is a chronic inflammatory lung disease mediated by type 2 cytokines produced by T helper 2 (Th2) cells as well as the recently discovered group 2 innate lymphoid cells (ILC2). Due to a lack of unique markers, the accurate phenotypic characterization and quantification of ILC2 requires a comprehensive panel of fluorescently labeled antibodies. The markers that are currently used to characterize ILC2 have not been standardized and often vary between research groups, which poses significant challenges when comparing data...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28063043/subcutaneous-and-sublingual-immunotherapy-in-a-mouse-model-of-allergic-asthma
#10
Laura Hesse, Martijn C Nawijn
Allergic asthma, caused by inhaled allergens such as house dust mite or grass pollen, is characterized by reversible airway obstruction, associated with an eosinophilic inflammation of the airways, as well as airway hyper responsiveness and remodeling. The inhaled allergens trigger a type-2 inflammatory response with involvement of innate lymphoid cells (ILC2) and Th2 cells, resulting in high production of immunoglobulin E (IgE) antibodies. Consequently, renewed allergen exposure results in a classic allergic response with a distinct early and late phase, both resulting in bronchoconstriction and shortness of breath...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28063042/murine-models-of-allergic-asthma
#11
Eline Haspeslagh, Nincy Debeuf, Hamida Hammad, Bart N Lambrecht
Allergic asthma is a heterogeneous inflammatory lung disease affecting millions of people worldwide and with a steadily increasing incidence. Mouse models have been of utmost importance in uncovering key inflammatory cell types, cytokines, and pathways in the development and maintenance of allergic asthma. Historically, the mainstay in experimental asthma research was sensitizing rodents to the model protein antigen ovalbumin (OVA) with the pro-Th2 adjuvant aluminum hydroxide, followed by repetitive OVA exposures to the airways to initiate a Th2-skewed adaptive immune response leading to eosinophilic airway inflammation and airway hyperreactivity (AHR)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28062483/the-sialic-acid-to-urea-ratio-as-a-measure-of-airway-surface-hydration
#12
Charles R Esther, David B Hill, Brian Button, Shuai Shi, Corey M Jania, Elizabeth A Duncan, Claire M Doerschuk, Gang Chen, Sarath Ranganathan, Stephen Michael Stick, Richard C Boucher
INTRODUCTION: Although airway mucus dehydration is key to pathophysiology of cystic fibrosis (CF) and other airways diseases, measuring mucus hydration is challenging. We explored a robust method to estimate mucus hydration using sialic acid as a marker for mucin content. METHODS: Terminal sialic acid residues from mucins were cleaved by acid hydrolysis from airway samples, and concentrations of sialic acid, urea, and other biomarkers analyzed using mass spectrometry...
January 6, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28049194/early-intervention-improves-clinical-responses-to-house-dust-mite-immunotherapy-in-allergic-rhinitis-patients
#13
Shanshan Qi, Hao Chen, Nan Huang, Wenjing Li, Guanghui Liu, Yin Wang, Lintao Hu, Xiaolong Wang, Wei Zhang, Rongfei Zhu
BACKGROUND: Allergen immunotherapy (AIT) is the unique causal treatment for respiratory allergy. As AIT is expensive and of long duration, the availability of a marker predicting AIT responders is of crucial relevance. OBJECTIVE: To investigate clinical parameters correlated with effective AIT in allergic rhinitis (AR) patients. METHODS: This is a prospective, nonrandomized open study in which a total of 284 AR patients who had received house dust mite (HDM) subcutaneous AIT were enrolled from January 2011 to December 2015, and then followed up for 3 consecutive years...
2016: International Archives of Allergy and Immunology
https://www.readbyqxmd.com/read/28045938/exposure-to-indoor-allergens-in-different-residential-settings-and-its-influence-on-ige-sensitization-in-a-geographically-confined-austrian-cohort
#14
Teresa Stemeseder, Bettina Schweidler, Patrick Doppler, Eva Klinglmayr, Stephanie Moser, Lisa Lueftenegger, Martin Himly, Roland Lang, Joerg Zumbach, Gertie J Oostingh, Thomas Hawranek, Arne C Bathke, Gabriele Gadermaier
BACKGROUND: Exposure to indoor allergens is crucial for IgE sensitization and development of allergic symptoms. Residential settings influence the allergen amount in house dust and hence allergic sensitization. Within this study, we investigated allergen exposure and molecule-based IgE levels in a geographically confined region and evaluated the impact of housing, pets and cleaning. METHODS: 501 adolescents from Salzburg, Austria participated in this cross-sectional study...
2017: PloS One
https://www.readbyqxmd.com/read/28042341/anti-angiogenic-nanotherapy-inhibits-airway-remodeling-and-hyper-responsiveness-of-dust-mite-triggered-asthma-in-the-brown-norway-rat
#15
Gregory M Lanza, John Jenkins, Anne H Schmieder, Aigul Moldobaeva, Grace Cui, Huiying Zhang, Xiaoxia Yang, Qiong Zhong, Jochen Keupp, Ismail Sergin, Krishna S Paranandi, Lindsey Eldridge, John S Allen, Todd Williams, Michael J Scott, Babak Razani, Elizabeth M Wagner
Although angiogenesis is a hallmark feature of asthmatic inflammatory responses, therapeutic anti-angiogenesis interventions have received little attention. Objective: Assess the effectiveness of anti-angiogenic Sn2 lipase-labile prodrugs delivered via αvβ3-micellar nanotherapy to suppress microvascular expansion, bronchial remodeling, and airway hyper-responsiveness in Brown Norway rats exposed to serial house dust mite (HDM) inhalation challenges. Results: Anti-neovascular effectiveness of αvβ3-mixed micelles incorporating docetaxel-prodrug (Dxtl-PD) or fumagillin-prodrug (Fum-PD) were shown to robustly suppress neovascular expansion (p<0...
2017: Theranostics
https://www.readbyqxmd.com/read/28042004/the-potential-role-of-allergen-immunotherapy-in-stepping-down-asthma-treatment
#16
Pascal Demoly, Melina Makatsori, Thomas B Casale, Moises A Calderon
For patients whose asthma is controlled and who have a low risk for future exacerbations, current guidelines recommend gradually stepping down pharmacotherapy to identify the lowest dose needed to maintain control. This review article will discuss the benefits and risks of step down in asthma management and the different strategies of achieving step down with particular focus on allergen immunotherapy (AIT). A literature search was conducted to identify studies that assessed the effect of AIT on asthma step down and evaluated this and asthma control as one of the outcomes...
December 29, 2016: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/28035014/assessment-of-airway-response-distribution-and-paradoxical-airway-dilation-in-mice-during-methacholine-challenge
#17
Stephen Dubsky, Graeme R Zosky, Kara Perks, Chaminda R Samarage, Yann Henon, Stuart B Hooper, Andreas Fouras
Detailed information on the distribution of airway diameters during bronchoconstriction in situ is required in order to understand the regional response of the lungs. Imaging studies using computed tomography (CT) have previously measured airway diameters and changes in response to bronchoconstricting agents, but the manual measurements used have severely limited the number of airways measured per subject. Hence, the detailed distribution and heterogeneity of airway responses is unknown. We have developed and applied dynamic imaging and advanced image-processing methods to quantify and compare hundreds of airways in vivo...
December 29, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28031122/-increased-eosinophils-in-nasal-exudation-after-allergic-rhinitis-nasal-provocation-are-positively-correlated-with-serum-level-of-specific-ige
#18
Yongping Liu, Yunguang Chen, Junbin Zheng, Shan Wang
Objective To study the relationship between specific nasal provocation test (SNPT) and serum specific IgE level in the patients with allergic rhinitis, and analyze the correlation between the eosinophil (EOS) percentage in nasal secretion and serum specific IgE level. Methods SNPT was performed in 80 cases of perennial allergic rhinitis due to dust mites. Specific IgE in the serum of those patients was detected by Unicap. EOS percentage in nasal secretions was recorded before and after SNPT. The correlation of EOS percentage and serum level of specific IgE was analyzed by Kendall's tau-b test...
January 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/28030368/sphingolipids-ormdl3-and-asthma-what-is-the-evidence
#19
Tilla S Worgall
PURPOSE OF REVIEW: Genome-wide association studies identified ORMDL3, a protein of the endoplasmic reticulum, as a significant asthma risk factor. ORMDL3 is one of three ORMDL proteins that integrate multiple signals to maintain sphingolipid homeostasis. Studies that investigated potential mechanisms for how increased ORMDL3 might affect asthma are summarized. RECENT FINDINGS: Investigations focused on decreased sphingolipid synthesis and on the unfolded protein response because ORMDL3 had been implicated in both...
December 24, 2016: Current Opinion in Clinical Nutrition and Metabolic Care
https://www.readbyqxmd.com/read/27996287/association-of-indoor-air-quality-and-preschool-children-s-respiratory-symptoms
#20
Pongtong Puranitee, Sirinapa Siwarom, Adisak Plitponkarnpim, Wiparat Manuyakorn, Ratchaneewan Sinitkul, Sakda Arj-Ong Vallipakorn
BACKGROUND: This study aimed to assess the association between exposure to indoor air pollution in DCCs (Child Day Care Centers) and the respiratory symptoms of children under 6 years old. METHODS: Air quality data were collected three times regarding seasonal variation. Pollutants measured in 11 DCCs included PM10, CO, NO2, SO2, O3, benzene, bacteria, fungi, and dust mite. The frequency of respiratory symptoms including coughing, rhinitis, and dyspnea were recorded via teacher and parent-report questionnaires...
December 12, 2016: Asian Pacific Journal of Allergy and Immunology
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