scholarly journals Sensitivity to House Dust Mites Allergens in Patients with Allergic Asthma in Erzincan Province, Turkey

2017 ◽  
Vol 41 (1) ◽  
pp. 34-41 ◽  
Author(s):  
Erhan Zeytun ◽  
Salih Dogan ◽  
Fatih Ozcicek ◽  
Edhem Unver
Keyword(s):  
Allergic Asthma ◽  
House Dust ◽  
House Dust Mites ◽  
Dust Mites

scholarly journals Environmental Allergens House Dust Mites-induced Asthma Causes Ferroptosis in the Lungs

2021 ◽  
Author(s):  
Weifeng Tang ◽  
Ming Dong ◽  
Fangzhou Teng ◽  
Jie Cui ◽  
Xueyi Zhu ◽  
...  
Keyword(s):  
Lipid Peroxidation ◽  
Allergic Asthma ◽  
House Dust ◽  
Inflammatory Cell ◽  
Morphological Changes ◽  
Mucus Secretion ◽  
House Dust Mites ◽  
Control Group ◽  
Dust Mites ◽  
Cell Counts

Abstract Background: Studies have indicated that allergens such as house dust mites (HDM) in the environment could induce allergic asthma. Ferroptosis is a newly discovered regulatory cell death characterized by aberrant lipid peroxidation and accumulation of reactive oxygen species (ROS) in cells. However, whether ferroptosis participates in the pathological progress of asthma remains to be elucidated. In this study, we used a HDM-induced mouse asthma model to determine the effect of HDM exposure on allergic asthma and the underlying mechanisms. Methods: Female BALB/c mice were intranasally exposed to HDM to induce allergic asthma. Airway hyperresponsiveness (AHR), lung inflammation and mucus secretion, IgE and cytokine levels as well as inflammatory cell counts in bronchalveolar lavage fluid (BALF) were investigated. In addition, the morphological changes of mitochondria, ROS, glutathione (GSH) levels and changes in ferroptosis pathway proteins in the lung were also determined. Results: HDM exposure increased AHR significantly, and enhanced inflammatory cell infiltration and mucus secretion around the airways. Furthermore, elevated IgE level in BALF, lung eosinophilia, and a concomitant increase in IL-13 and IL-5 in BALF were observed. HDM inhalation increased ROS and decreased GSH level in the lung. HDM inhalation induced dysmorphic small mitochondria with decreased crista, as well as condensed, ruptured outer membranes. Western blot analysis demonstrated that activity of glutathione peroxidase 4 (GPX4) and catalytic subunit solute carrier family 7 member 11 (SLC7A11) decreased significantly, and protein expression of acyl-CoA synthetase long-chain family member 4 (ACSL4) and 15 Lipoxygenase 1 (15-LO1) upregulated prominently compared with mice in normal control group. Conclusions: These in all indicated that the AHR, airway inflammation, lipid peroxidation and ROS level increased in HDM-induced asthma, and HDM inhalation caused ferroptosis in the lungs, which helped to form a better understanding of the pathogenesis of allergic asthma and targeted treatment strategies.

scholarly journals Impact of house dust mite-driven asthma on children’s school performance and activity

2021 ◽  
Author(s):  
Catalina Gómez ◽  
Judit Barrena ◽  
Vanesa García-Paz ◽  
Ana M. Plaza ◽  
Paula Crespo ◽  
...  
Keyword(s):  
Children And Adolescents ◽  
Allergic Asthma ◽  
House Dust ◽  
Allergen Immunotherapy ◽  
House Dust Mites ◽  
Dust Mites ◽  
Activity Impairment ◽  
Daily Lives ◽  
School Work ◽  
Clinical Benefits

AbstractEvidence regarding asthma’s impact on children’s daily lives is limited. This prospective and cross-sectional, observational, multicenter study assessed school/work and activity impairment in children and adolescents with allergic asthma and their caregivers and allergen immunotherapy (AIT) effects. Included patients were schooled children and adolescents (5 to 17 years) with allergic asthma due to house dust mites (HDM). Impairment of school/work (i.e., absenteeism and presenteeism) and activity was measured in patients and their caregivers using the Work Productivity Impairment Questionnaire plus Classroom Impairment Questions: Allergy Specific (WPAI + CIQ:AS). HDM allergic patients with school impairment received subcutaneous AIT with a MicroCrystalline Tyrosine-associated allergoid. WPAI + CIQ:AS and effectiveness variables were compared between baseline and 1-year post-AIT. Of the 113 patients included, 59 (52.2%) and 51 (45.1%) showed school and activity impairment, respectively, missing a mean (SD) of 37.6 (24.4) % and 42.6 (25.6) % of school and activity time, respectively. Twenty-six (23%) caregivers reported activity impairment and, of the 79 (69.9%) employed, 30 (38%) reported work impairment. Of the 65 patients with school/activities impairment, 41 (63.1%) received AIT, of which 21 (51.2%) completed 1 year of treatment. Effectiveness variables and WPAI + CIQ:AS significantly improved: Mean (SD) school impairment decreased from 39.7 (26.7) to 2.1 (7.1) % (p < 0.001) and activity impairment from 46.2 (34.6) to 1.4 (3.6) % (p < 0.001).Conclusion: Allergic asthma due to HDMs results in school/work and activity impairment in children and adolescents and their caregivers. One year of AIT provided clinical benefits and reduced school and activity impairment. What is Known:• Allergic asthma impairs children’s school performance and daily activities.• Allergen immunotherapy modifies allergic disease course and ameliorates its symptoms. What is New:• Asthma symptoms due to allergy to house dust mites impair children’s school attendance and productivity and daily activity and their caregivers’ work performance and daily lives.• Allergen immunotherapy with a house dust mite MicroCrystalline Tyrosine (MCT)-associated allergoid seems to provide clinical benefits, associated with decreased school and activity impairment, supporting it as an effective treatment option.

scholarly journals Precision Medicine in House Dust Mite-Driven Allergic Asthma

2020 ◽  
Vol 9 (12) ◽  
pp. 3827
Author(s):  
Ibon Eguiluz-Gracia ◽  
Francisca Palomares ◽  
Maria Salas ◽  
Almudena Testera-Montes ◽  
Adriana Ariza ◽  
...  
Keyword(s):  
Allergic Asthma ◽  
House Dust ◽  
Inhaled Corticosteroids ◽  
Current Knowledge ◽  
Allergen Challenge ◽  
Pharmaceutical Products ◽  
House Dust Mites ◽  
Dust Mites ◽  
Bronchial Allergen Challenge

House dust mites (HDMs) are the allergenic sources most frequently involved in airway allergy. Nevertheless, not every sensitized patient develops respiratory symptoms upon exposure to HDM, and there is a clinical need to differentiate allergic asthmatics (AAs) from atopic non-allergic asthmatics with HDM sensitization. This differentiation sometimes requires in vivo provocations like the bronchial allergen challenge (BAC). Interestingly, recent data demonstrate that non-atopic patients with asthma can also develop positive BAC results. This novel phenotype has been termed local allergic asthma (LAA). The interest in identifying the allergic triggers of asthma resides in the possibility of administering allergen immunotherapy (AIT). AIT is a disease-modifying intervention, the clinical benefit of which persists after therapy discontinuation. Recently, new modalities of sublingual tablets of HDM immunotherapy registered as pharmaceutical products (HDM-SLIT tablets) have become commercially available. HDM-SLIT tablets have demonstrated a robust effect over critical asthma parameters (dose of inhaled corticosteroids, exacerbations, and safety), thus being recommended by international guidelines for patients with HDM-driven AA. In this review, we will summarize the current knowledge on the phenotype and endotype of HDM-driven AA, and LAA, address the difficulties for BAC implementation in the clinic, and discuss the effects of AIT in AA and LAA.

Sensitivity in allergic asthmatic subjects towards house dust mite allergens

2021 ◽  
Vol 26 (1) ◽  
pp. 75-84
Author(s):  
Amandeep Kaur Dhaliwal ◽  
Devinder Singh ◽  
Ramanpreet Kaur Randhawa ◽  
Atinderpal Singh
Keyword(s):  
Allergic Asthma ◽  
House Dust ◽  
House Dust Mite ◽  
Specific Ige ◽  
Mite Species ◽  
House Dust Mites ◽  
Total Serum ◽  
Dust Mites ◽  
Allergic Asthmatic ◽  
Dust Mite

Asthma is a common problem that affects about 20 million peoples in India and can be often under-diagnosed or misdiagnosed. It can be allergic or non-allergic though the former type is more common and prevalent. Allergic asthma can be triggered by many allergens and house dust mites (HDM) are one of the common indoor allergens. The present study emphasizes the significance of house dust mites in allergic asthmatic subjects which is based on 115 asthmatic subjects in Punjab, India. For the quantification and the estimation of total serum Immunoglobulin E and HDM specific IgE, a mixture of 14 allergens and a mixture of two mite allergens viz. Dermatophagoides pteronyssinus and D. farinae were used respectively. Total and specific IgE levels were detected on ImmunoCAP Phadia 100. A statistically significant correlation between total and HDM specific IgE levels of 115 asthmatic subjects was found as compared to control group of 30 non-allergic individuals. The specific IgE levels of 54.78% subjects against the allergen of two mite species were found to be positive. Dust samples were taken from various localities of the houses to identify the diversity of house dust mites which were responsible for allergic asthma. Five common house dust mite species viz. D. pteronyssinus Trouessart, D. farinae Hughes, D. microceras Griffiths and Cunnington, D. aureliani Fain and Euroglyphus maynei Cooreman were identified from the dust. The present study observed that total IgE levels were higher with higher specific IgE levels against the mixture of two mite allergens viz. D. pteronyssinus and D. farinae in the blood serum.  D. pteronyssinus was the most abundant and prevalent mite species followed by D. farinae. Therefore, present study concluded that HDM specific IgE levels against the mite allergen of D. pteronyssinus and D. farinae in the serum of allergic asthmatic subjects were found to be higher because of the higher prevalence of these two mites (D. pteronyssinus i.e. 69.80% and D. farinae i.e. 20.72%) in the house of allergic asthmatic subjects as compared to other identified mites.

scholarly journals A major house dust mite allergen disrupts the immunoglobulin E network by selectively cleaving CD23: innate protection by antiproteases.

1995 ◽  
Vol 182 (5) ◽  
pp. 1537-1544 ◽  
Author(s):  
C R Hewitt ◽  
A P Brown ◽  
B J Hart ◽  
D I Pritchard
Keyword(s):  
Cell Surface ◽  
Immune Responses ◽  
Allergic Asthma ◽  
House Dust ◽  
House Dust Mite ◽  
Immunoglobulin E ◽  
House Dust Mites ◽  
Dust Mites ◽  
Group I ◽  
Dust Mite

Asthma is a chronic life-threatening disease of worldwide importance. Although allergic asthma and related atopic conditions correlate strongly with immune sensitization to house dust mites, it is unclear why antigens from mites provoke such powerful allergic immune responses. We have characterized the protease activity of Der p I, the group I protease allergen of the house dust mite Dermatophagoides pteronyssinus, and here report that it cleaves the low-affinity immunoglobulin (Ig) E Fc receptor (CD23) from the surface of human B lymphocytes. Der p I selectively cleaves CD23 and has no effect on the expression of any other B cell surface molecules tested. We speculate that this loss of cell surface CD23 from IgE-secreting B cells may promote and enhance IgE immune responses by ablating an important feedback inhibitory mechanism that normally limits IgE synthesis. Furthermore, since soluble CD23 is reported to promote IgE production, fragments of CD23 released by Der p I may directly enhance the synthesis of IgE. alpha 1-Antiprotease, a pulmonary antiprotease, is also shown to inhibit the cleavage of CD23 by Der p I. This may be significant in the etiopathogenesis of asthma, because other indoor pollutants associated with asthma are known to potently inhibit this antiprotease. These data suggest that the proteolytic activity of Der p I, the group I allergen of the house dust mite D. pteronyssinus, is mechanistically linked to the potent allergenicity of house dust mites. Furthermore, inhibition of Der p I by alpha 1-antiprotease suggests a mechanism by which confounding factors, such as tobacco smoke, may act as a risk factor for allergic asthma.

scholarly journals Association between serum zonulin level and severity of house dust mite allergic asthma

2021 ◽  
Author(s):  
Shereen A. Baioumy ◽  
Shereen Mahmoud Ibrahim ◽  
Aya Elgendy ◽  
Shaimaa Hani Fouad
Keyword(s):  
Allergic Asthma ◽  
Intestinal Permeability ◽  
House Dust ◽  
Critical Role ◽  
House Dust Mites ◽  
Control Group ◽  
Dust Mites ◽  
Asthmatic Patients ◽  
Significant Difference ◽  
Barrier Defect

Abstract Background: Increased intestinal permeability, either due to the exposure to antigens in asthmatic patients or due to a barrier defect, play a critical role in susceptibility to environmental allergens. House dust mites allergy occurs more commonly than any other allergens among Egyptian asthmatic patients.Aim:To assess the relation between serum zonulin level as a marker of increased intestinal permeability and the severity of house dust mites allergic asthma.Methods:A case control study which included 48 house dust mites allergic asthma and 48 healthy control subjects attending the allergy and immunology unit, microbiology and immunology department, Faculty of medicine, Zagazig University. Results:On comparing the 2 studied groups, there was a statistically significant difference between the 2 groups concerning serum IgE and serum zonulin levels ( p=0.000, 0.000 respectively)The mean serum zonulin was equal to 258.3±153.01 ng/ml in the asthmatic group and 80±13 ng/ml in the control group. Serum zonulin level significantly increased with the increase of asthma severity (p˂0.001). The cut off value of serum zonulin was ≥ 198 ng/ml, and the area under the curve was 0.76. It displayed sensitivity equal to 80% and specificity equal to 71.4%. Its negative predictive value was equal to 83.3%. Conclusion: Intestinal barrier dysfunction contributes in the pathogenesis of allergic asthma. Serum zonulin level reflects an increase in intestinal permeability and acts as prognostic factor of severity in Asthma. Correction of the gut barrier defect may be an additional novel approach for Asthma.

Sign in / Sign up

Export Citation Format

Share Document