Epithelial Cell Membrane Perforation Induces Allergic Airway Inflammation
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ABSTRACT:
PROVIDER: PRJNA1156895 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| Other | ||||
| SRR30556512_1.fastq.gz | Fastqsanger.gz | |||
| SRR30556512_2.fastq.gz | Fastqsanger.gz | |||
| SRR30556513_1.fastq.gz | Fastqsanger.gz | |||
| SRR30556513_2.fastq.gz | Fastqsanger.gz |
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Project description:Allergens that induce allergic airway inflammation are highly diverse, yet they commonly activate type 2 immune responses1,2. Airway epithelial cells are crucial in the immune sensing of allergens3-5. However, what shared features among diverse allergens lead to their similar innate immune sensing, and how epithelial cells detect these features, remain poorly defined1,2,6-9. Here, we show that pore-forming proteins represent one of the common stimuli of allergic airway inflammation and elucidate their immune activation mechanisms. Using the prevalent mold allergen Alternaria alternata (A. alternata) as a model, we established a unique in vitro system to investigate type 2 innate immune sensing. Through a six-step biochemical fractionation, we identified its core immune-stimulatory components as Aeg-S and Aeg-L. Biochemical reconstitution and cryo-electron microscopy demonstrate that these proteins form 16-20-mer transmembrane pore complexes. Their cooperative perforation acts as a bona fide type 2 immune adjuvant to support antigen-specific TH2 and IgE responses. Genetically engineered A. alternata strains lacking such pore-forming activity fail to induce allergic responses in mice. Moreover, pore-forming proteins from various species, despite structural and membrane target differences, are sufficient to trigger respiratory allergies. Perforations in airway epithelial cells initiate allergic responses through two mechanisms: one triggers IL-33 release; another involves Ca2+ influx, which induces MAPK pathway activation and type 2 inflammatory gene expression. These findings provide insight into how type 2 immune responses detect common perturbations caused by structurally diverse stimuli. Targeting downstream signaling of epithelial cell perforation may open new avenues for treating respiratory allergies.
2025-06-18 | GSE276386 | GEO
Project description:Obesity is associated with severe, difficult to control asthma, and increased airway oxidative stress. Mitochondrial reactive oxygen species (mROS) are an important source of oxidative stress leading us to hypothesize that targeting mROS in obese allergic asthma might be an effective treatment strategy. Using a mouse model of house dust mite (HDM) induced allergic airway disease in mice fed a low- (LFD) or high-fat diet (HFD), and the mitochondrial antioxidant MitoQuinone (MitoQ); we investigated the effects of obesity and mROS on airway inflammation, remodelling and airway hyperreactivity (AHR). HDM induces airway inflammation, remodelling and hyperreactivity in both lean and obese mice. Obese allergic mice showed increased lung tissue eotaxin levels, airway tissue eosinophilia and AHR when compared to lean allergic mice. MitoQ reduced markers of airway inflammation, remodelling and hyperreactivity in both lean and obese allergic mice, and tissue eosinophilia in obeseHDM mice. mROS regulates cell signalling by protein oxidation of multiple downstream targets: MitoQ reduced HDM-induced cysteine-sulfenylation of several proteins including those involved in the unfolded protein response (UPR). In summary, mROS mediates the development of allergic airway disease and hence MitoQ might be effective for the treatment for asthma, and specific features of obese asthma.
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Project description:This SuperSeries is composed of the following subset Series: GSE35979: Gene expression data from IL13-induced allergic airway inflammation of mice lungs GSE35980: MicroRNA expression data from IL13-induced allergic airway inflammation of mice lungs GSE37079: Methylated DNA immunoprecipitation (MeDIP) microarray data from IL13-induced allergic airway inflammation of mouse lungs Refer to individual Series
2012-04-06 | E-GEOD-37085 | biostudies-arrayexpress
Project description:Fungal spores, abundant in the environment, are a major cause of asthma. But the precise host response that triggers fungal allergic airway inflammation remains unclear. We found that CD11c+ DCs and CD4+ T cells are essential for development of airway inflammation in mice when repeatedly exposed to inhaled spores. To delinate which DC subsets are mediating fungal allergic inflammation we undertook single cell RNAseq of DCs isolated from the lungs of mice exposed to fungal spores. This identified precise subsets altered upon spore exposure and following targeted removal identified distinct DC subsets (Mgl2+ cDC2s) that are essential for fungal allergic airway inflammation.
2024-12-04 | E-MTAB-13740 | biostudies-arrayexpress
Project description:Background: A specific subset of regulatory IL-10 producing B cells has been extensively studied in autoimmune and inflammatory pathologies. These cells are able to constrain exacerbated inflammation by inhibiting T cell mediated responses and maturation of antigen presenting cells. In allergic diseases, observations that increase of regulatory B cells is necessary for allergen tolerance suggest that development of allergic asthma would be associated with a defect in the regulatory B cells compartment. Objective: We sought to (i) characterize regulatory IL-10+ regulatory B cell subset in Balb/c mice by microarray and flow cytometry and (ii) investigate their regulatory capacity in vivo in a house dust mite model of allergic asthma. Results: We identified an IL-10 producing B cells subset able to control T cell proliferation in vitro in both control and asthmatic mice. This subset is decreased in allergic mice. IL-10+ Breg cells express high levels of CD9 and upregulate CD70 and CD73 after activation. Expression of CD9 allows identifying more than 50% of Bregs. Interestingly CD9+ B cells inhibit TH2-TH17 allergic airway inflammation in vivo after adoptive transfer in an IL-10 dependent manner. Conclusions: Herein, we demonstrate that induction of allergic asthma dampens the generation of Bregs contributing to exacerbated airway inflammation. We identified a distinct CD9+ Breg-cell population decreased in lung of HDM mice and able to control asthma and allergic airway inflammation by producing IL-10 after adoptive transfer. This study points B cells as an interesting therapeutic target in allergic asthma. IL-10+ B cells (n=3) and 3 IL-10- B cells (n=3) in control mice + IL-10+ B cells (n=3) and 3 IL-10- B cells (n=3) from asthmatic allergic (HDM) mice
2015-03-01 | E-GEOD-57772 | biostudies-arrayexpress
Project description:Asthma is a common chronic inflammatory airway condition with a strong genetic and inheritability component, as siblings and first-degree relatives of those with the disease are often affected. For our studies, we used a well-characterized transgenic mouse model of allergic airway inflammation induced by IL13. In this model, IL13 is conditionally overexpressed in the mouse lung when treated with doxycycline. Upon IL13 induction, these mice showed inflammatory cell infiltration, pronounced emphysema, increased pulmonary compliance, lung volume enlargement, mucus metaplasia, and increased expression of matrix metalloproteinases and cathepsins in the lung. We performed gene expression microarray to examine the changes in gene expression during IL13-induced allergic airway inflammation. The CC10-rtTA-IL13 transgenic (TG) and wildtype (WT) mice were treated with doxycycline for seven days. Mice were euthanized and the left upper lobes from all mice were removed for RNA extraction using the TRIzol method.
2012-02-23 | E-GEOD-35979 | biostudies-arrayexpress
Project description:DJ-1 is an antioxidant protein known to regulate mast cell mediated allergic response, but its role in airway eosinophilic interactions and allergic inflammation is not known.
2023-12-01 | GSE207415 | GEO
Project description:Immune cell transcriptional programs severe allergic airway inflammation
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Project description:Background DJ-1 is an antioxidant protein known to regulate mast cell mediated allergic response, but its role in airway eosinophilic interactions and allergic inflammation is not known. Objective The aim of this study was to investigate the role of DJ-1 in airway eosinophilic inflammation in vitro and in vivo. Methods Ovalbumin-induced airway allergic inflammation was established in mice. ELISA was adopted to analyze DJ-1 and cytokine levels in mouse bronchoalveolar lavage fluid. Transcriptional profiling of mouse lung tissues was conducted by single-cell RNA sequencing technology. The role of DJ-1 in the differentiation of airway progenitor cells into goblet cells was examined by organoid cultures, immunofluorescence staining, quantitative PCR, and cell transplantation in normal, DJ-1 knockout (KO), or conditional DJ-1 KO mice. Results We observed that DJ-1 was increased in the lung tissues of ovalbumin-sensitized and challenged mice. DJ-1 KO mice exhibited reduced airway eosinophil infiltration and goblet cell differentiation. Mechanistically, we discovered that eosinophil-club cell interactions are reduced in the absence of DJ-1. Organoid cultures indicated that eosinophils impair the proliferative potential of club cells. Intratracheal transplantation of DJ-1-deficient eosinophils suppresses airway goblet cell differentiation. Loss of DJ-1 inhibits the metabolism of arachidonic acid into cysteinyl leukotrienes in eosinophils while these secreted metabolites promote airway goblet cell fate in organoid cultures and in vivo. Conclusion DJ-1-mediated interactions between airway epithelial progenitor cells and immune cells are essential in controlling airway goblet cell metaplasia and eosinophilia. Blockade of the DJ-1 pathway is protective against airway allergic inflammation.
2022-12-21 | GSE203079 | GEO
Project description:Epigenetic changes have been implicated in pathogenesis of asthma. We sought to determine if IL13, a key cytokine in airway inflammation and remodeling, induced epigenetic DNA methylation changes in the airways in conjunction with its transcriptional gene regulation. For our studies, we used a well-characterized transgenic mouse model of allergic airway inflammation induced by IL13. In this model, IL13 is conditionally overexpressed in the mouse lung when treated with doxycycline. Upon IL13 induction, these mice showed inflammatory cell infiltration, pronounced emphysema, increased pulmonary compliance, lung volume enlargement, mucus metaplasia, and increased expression of matrix metalloproteinases and cathepsins in the lung. We performed MeDIP microarray to examine the changes in DNA promoter methylation during IL13-induced allergic airway inflammation. The CC10-rtTA-IL13 transgenic (TG) and wildtype (WT) mice were treated with doxycycline for seven days. Mice were euthanized and the left lower lobes from all mice were removed for DNA extraction followed by MeDIP array analysis.
2012-04-06 | E-GEOD-37079 | biostudies-arrayexpress