scholarly journals Systematic Characterization of the Group 2 House Dust Mite Allergen in Dermatophagoides microceras

2022 ◽  
Vol 11 ◽  
Author(s):  
Rei-Hsing Hu ◽  
Chia-Ta Wu ◽  
Ting-Shuan Wu ◽  
Feng-Yih Yu ◽  
Jiunn-Liang Ko ◽  
...  
Keyword(s):  
Allergic Asthma ◽  
House Dust ◽  
Immunoglobulin E ◽  
Draft Genome ◽  
Public Health Problem ◽  
Mite Allergen ◽  
House Dust Mites ◽  
Epithelial Cell Line ◽  
Group 2 ◽  
Lps Binding

BackgroundAllergic asthma, a chronic airway inflammatory disease, is a critical public health problem. Indoor house dust mites (HDMs) could cause allergic asthma. The prevalence of sensitization to Dermatophagoides microceras (Der m) was approximately 80% and is related to the immunoglobulin E crossing-reactivity of mites belonging to the same genus, Dermatophagoides pteronyssinus (Der p) and Dermatophagoides farina (Der f). However, studies on Der m are scant.MethodsWe used integrated OMICs approaches to identify and characterize the group 2 mite allergen-like protein in Der m (Der m 2). We established a Der m 2-induced allergic asthma mouse model and treated the mice with a fungal immunomodulatory protein (FIP-fve) isolated from Flammulina veluptipes to evaluate the allergenicity of Der m 2 and the immunomodulatory effects of FIP-fve.ResultsBy performing de novo draft genome assembly and comparative genome analysis, we identified the putative 144-amino acid Der m 2 in silico and further confirmed its existence through liquid chromatography–tandem mass spectrometry. Der m 2 is a lipopolysaccharides (LPS)-binding protein. Thus, we examined the LPS-binding activity of recombinant Der m 2 by performing molecular docking analysis, co-immunoprecipitation (Co-IP), and a pull-down assay. Der m 2 elicited the production of pro-inflammatory cytokines, interleukin (IL)-6, and IL-8 in BEAS-2B cells, a human bronchial epithelial cell line, and induced airway hyperresponsiveness in mice. Furthermore, in mice sensitized with Der m 2, the administration of FIP-fve in either the earlier stage or the late stage, FIP-fve alleviated allergic asthma by moderating airway inflammation and remodeling.ConclusionsDer m 2 induced inflammatory responses in cell and mouse models. FIP-fve alleviated inflammation in Der m 2-induced asthma in mice by exerting an immunomodulatory effect.

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 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 Could FeNO Predict Asthma in Patients with House Dust Mites Allergic Rhinitis?

Medicina ◽  
2020 ◽  
Vol 56 (5) ◽  
pp. 235
Author(s):  
Ioana Adriana Muntean ◽  
Ioana Corina Bocsan ◽  
Stefan Vesa ◽  
Nicolae Miron ◽  
Irena Nedelea ◽  
...  
Keyword(s):  
Allergic Rhinitis ◽  
House Dust ◽  
Immunoglobulin E ◽  
Biological Evaluation ◽  
House Dust Mites ◽  
Dust Mites ◽  
Persistent Allergic Rhinitis ◽  
Tnf Α ◽  
One Year ◽  
High Level

Background and Objectives: The evolution of allergic rhinitis to asthma is a part of “atopic march”. The aim of this study was to analyze possible predictive markers for asthma occurrence in patients with allergic rhinitis to house dust mites (HDM). Materials and Methods: Fifty-eight patients with persistent allergic rhinitis (PAR) were included. The clinical, biological evaluation and fractionated exhaled nitric oxide (FeNO) measurement were performed at enrolment. The patients were clinically evaluated after one year to determine asthma occurrence. Results: The severity of rhinitis symptoms, levels of total immunoglobulin E (IgE), ICAM-1, VCAM-1, E-selectin and IL-6, but not IL-8 and TNF-α were higher in patients with allergic rhinitis who developed asthma compared to non-asthmatics, but the differences were not significant to considered them as predictive factors for asthma occurrence. The risk of asthma was independently influenced by patients aged over 30 years ((OR-3.74; CI95% 0.86–16.31; p = 0.07), a duration of allergic rhinitis over 12 months ((OR-4.20; CI95% 0.88–20; p = 0.07) and a basal FeNO over 28 parts per billion (pbb) ((OR-18.68; CI95% 3.79–92.05; p < 0.001). Conclusion: Clinical and biological parameters may predict asthma occurrence in patients with persistent allergic rhinitis to HDM. Adult patients with a longer duration of rhinitis symptoms and a high level of FeNO have a greater risk to develop asthma.

Specific Immunoglobulin E and Immunoglobulin G4 toward Major Allergens of House-Dust Mite during Allergen-Specific Immunotherapy

2017 ◽  
Vol 31 (3) ◽  
pp. 156-160 ◽  
Author(s):  
Jianjun Chen ◽  
Yue Zhou ◽  
Yanjun Wang ◽  
Yiwu Zheng ◽  
Xuxin Lai ◽  
...  
Keyword(s):  
House Dust ◽  
House Dust Mite ◽  
Immunoglobulin E ◽  
Allergen Specific Immunotherapy ◽  
Specific Immunoglobulin E ◽  
Dust Mite ◽  
Specific Immunoglobulin ◽  
Clinical Responses ◽  
Major Allergens ◽  
Group 2

Background Specific immunoglobulin E (sIgE) and sIgG4 to house-dust mite (HDM) major allergens during allergen immunotherapy (AIT) and their clinical relevance remain unclear. Objective To investigate the variation of sIgE and sIgG4 to HDM major allergens and the correlation with clinical responses during AIT in patients with allergic rhinitis. Methods Thirty-nine patients with HDM allergy were divided into the AIT group (taking immunotherapy) and the control group (medication only use). The AIT group was subdivided into negative clinical responses to AIT (nAIT) group and positive clinical responses to AIT (pAIT) group according to symptom relief and subjective evaluation. sIgE and sIgG4 to Dermatophagoides pteronyssinus (Dp) and Dermatophagoides farinae (Df), and their group 1 and group 2 major allergens (Dp1, Df1, Dp2, and Df2) were measured before AIT, at 6 months, and at 1 year after starting AIT. Results Dp2, Df, and Df2 sIgE values decreased significantly in the pAIT group versus the nAIT group after 1 year of AIT (median values of delta change were Dp2, -10.09 versus 5.89 kU/L, p = 0.001; median values of Df were —9.69 versus 17.54 kU/L, p = 0.004; median values of Df2 were -11.06 versus 20.08 kU/L, p = 0.013). There was a robust increase in the sIgG4 values to Dp, Df, and their major allergens in both the pAIT and the nAIT groups overall after 1 year of treatment. Conclusion Patients with a positive response to AIT showed a significant reduction of HDM group 2 sIgEs compared with those with a negative response to AIT, which indicated that a decrease in group 2 sIgEs could be a marker that reflected AIT clinical efficacy.

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 High Dust Mite specific Immunoglobulin E (sIgE): a Promising Indicator of Allergic Rhinitis to Asthma

2020 ◽  
Author(s):  
Rui Tang ◽  
Xiaohong Lyu ◽  
Yuelun Zhang ◽  
Shi Chen ◽  
Hong Li
Keyword(s):  
Allergic Rhinitis ◽  
House Dust ◽  
House Dust Mite ◽  
Immunoglobulin E ◽  
House Dust Mites ◽  
Kaplan Meier ◽  
Sige Level ◽  
Specific Immunoglobulin E ◽  
Dust Mite ◽  
Specific Immunoglobulin

Abstract Background: House dust mites are the most prevalent allergens in patients with asthma and/or rhinitis in China. Cross-sectional data in 2009 have shown that allergic rhinitis often preceded or occurred at the same time as asthma in patients which was used to investigate the association of serum specific immunoglobulin E (sIgE) levels to house dust mite with the onset of asthma in patients with allergic rhinitis. Methods: 321 patients with allergic rhinitis were face-to-face interviewed and underwent sIgE tests to house dust mite. The temporal sequence of allergic rhinitis and asthma was documented. Univariate analysis, multinomial logistic regression, and Kaplan-Meier survival analysis were performed. Results: Of the 321 participants, 213 (66.4%) had asthma, which occurred after or simultaneously with rhinitis, and 108 (33.6%) suffered from allergic rhinitis only. After controlling basic parameters, factors correlated to sIgE, and essential factors considered by clinical allergists, the risk of developing asthma always increased with the levels of sIgE to house dust mite in all four models (p < 0.01). In Kaplan–Meier analysis, in the first ten years with allergy rhinitis, a high sIgE level represented a high probability of the coexistence of allergic rhinitis and asthma (p < 0.01). For house dust mite sIgE level 5-6, 5 years Rhinitis-Asthma Conversion Rate (RACR) had reached almost 70%. Conclusion: High-level house dust mite sIgE can exist as an indicator of rhinitis to asthma. It provides a theoretical basis for early intervention in patients with high sIgE levels in order to prevent asthma. This assessment and intervention should be performed at the early stage of rhinitis.

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.

Atopic Dermatitis: Role of Food and House Dust Mite Allergens

PEDIATRICS ◽  
1993 ◽  
Vol 92 (2) ◽  
pp. 252-256
Author(s):  
G. J. A. Casimir ◽  
J. Duchateau ◽  
B. Gossart ◽  
Ph. Cuvelier ◽  
F. Vandaele ◽  
...  
Keyword(s):  
Atopic Dermatitis ◽  
House Dust ◽  
Soya Protein ◽  
House Dust Mites ◽  
Dust Mites ◽  
Specific Igg ◽  
Exclusion Diet ◽  
Group 2 ◽  
Β Lactoglobulin ◽  
Group 1

Objective. The aim of this study was to evaluate the humoral immune response to cow milk (CM) protein, soya protein, and house dust mites in a group of 64 CM-fed infants, who had atopic dermatitis as the sole atopic manifestation, by measuring not only IgE but also specific IgG antibodies (Ab) against bovine β-lactoglobulin, soya flour aqueous extracts, and Der P1 antigens. Methods. A CM-free diet (Nan HA, Nestle) was given to these 64 CM-fed infants and the sensitivity to CM proteins was established by a positive challenge test with the offending food in improved infants. The serum was obtained just before the start of the CM-free diet, at the first consultation. The patients were classified into two groups according to their clinical response to the hypoallergenic formula. Results. Thirty-one infants (group 1) improved dramatically (positive challenge test), and 33 (group 2) did not improve with the exclusion diet but did improve after eviction of dust-producing items in the environment. The two groups were different in terms of their total IgE immunoglobulin concentration (higher in group 1, P &lt; .05) and concentration of specific IgE Ab against CM protein (more frequent in group 1, P &lt; .01). The IgG Ab concentrations against β-lactoglobulin, the major CM antigen (P &lt; 10-4), and against soya protein (P &lt; .01) were significantly more elevated in the group improved by the diet, with a threshold above which the response to the exclusion diet could be predicted as positive. On the contrary, the level of specific IgG Ab against house dust mites was four times higher in group 2 than in group 1. Twenty-nine of the 33 infants of group 2 improved after eviction of dust-producing items in the environment. Conclusions. It is proposed that specific IgG Ab concentrations against β-lactoglobulin, soya protein, and Der P1 antigen be determined in infants and children suffering from atopic dermatitis as a means of predicting the response to an exclusion diet, and a possible role of house dust mites in the pathogenicity of the disease is suggested.

Importance of house dust and storage mites in canine atopic dermatitis in the geographic region of Galicia, Spain

2008 ◽  
Vol 56 (2) ◽  
pp. 163-171 ◽  
Author(s):  
Ana Goicoa ◽  
Luciano Espino ◽  
Isabel Rodríguez ◽  
Anna Puigdemont ◽  
Pilar Brazis ◽  
...  
Keyword(s):  
Atopic Dermatitis ◽  
House Dust ◽  
Immunoglobulin E ◽  
Geographic Area ◽  
Geographic Region ◽  
House Dust Mites ◽  
Dust Mites ◽  
Storage Mites ◽  
Canine Atopic Dermatitis

Sensitisation to mites is frequent in atopic dogs. The main mite genus involved in canine atopic dermatitis is Dermatophagoides . The importance of storage mite allergens in dogs has been controversial. The aim of this study was to evaluate the sensitisation rates against storage mites ( Lepidoglyphus destructor and Tyrophagus putrescentiae ) and house dust mites ( Dermatophagoides farinae and D. pteronyssinus ) in atopic dogs from Galicia, a highly humid and temperate region of Spain, using a FcɛRIα-based immunoglobulin E (IgE) in vitro test. The study was performed on 95 dogs suffering from atopic dermatitis and presenting detectable specific serum IgE levels: 91.6% of the dogs tested positive for storage mites, whereas sensitisation to house dust mites was detected in 87.4%. These results indicate the importance of storage mites in this specific geographic area.

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