Altered response of macrophages to an inflammatory stimulus in an allergic environment
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ABSTRACT:
PROVIDER: PRJNA430700 | ENA |
REPOSITORIES: ENA
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Project description:To investigate how an allergic cytokine environment (associated with increased levels of IL4 and IL-13) alters the response of macrophages to a pro-inflammatory stimulus.
2018-02-12 | GSE109372 | GEO
Project description:Despite IL-9 functioning as a pleiotropic cytokine in mucosal environments, the IL-9 responsive cell repertoire is still not well defined. Here, we found IL-9 mediates pro-allergic activities by targeting lung macrophages. IL-9 inhibits alveolar macrophage expansion and promotes recruitment of monocytes that develop into CD11c+/- interstitial macrophage populations. Interstitial macrophages were required for IL-9-dependent allergic responses. Mechanistically, IL-9 affects the function of lung macrophages by inducing Arg1 activity. Compared to Arg1-deficient lung macrophages, Arg1-expressing macrophages co-express greater amounts of CCL5. Adoptive transfer of Arg1+ lung macrophages but not Arg1- lung macrophages can recover allergic inflammation that is lost in Il9r-/- mice. In parallel, the elevated expression of IL-9, IL-9R, Arg1 and CCL5 is correlated with disease in asthma patients. Thus, our study uncovers an IL-9/macrophage/Arg1 axis as a potential therapeutic target for allergic airway inflammation.
2021-11-15 | GSE162898 | GEO
Project description:An IL-9-pulmonary macrophage axis defines the allergic lung inflammatory environment
| PRJNA683661 | ENA
Project description:Our lab is currently using macrophages as a model system for understanding how genetic
variation modulates the response to external environmental stimulus. We want to extend this
beyond regular polyadenylated RNA to small RNAs such as miRNAs. This project would
cover the costs of a pilot to study miRNA response to LPS stimulus, and will be performed as
part of a rotation project in the lab. We will require a small number of miRNA libraries and a
single lane of MiSeq
| EGAS00001000691 | EGA
Project description:The implication of alveolar macrophages (AM) in asthma, a Th2 disease, has not been well characterized. Thus, the goal of this study is to better characterize AM phenotype of allergic asthmatic compared with normal subjects using genomic expression analyses. Microarray analyses were performed with AM isolated from bronchoalveolar lavage. Robust multiarray analysis (RMA) normalization and Smythâs moderated t test were used to select differentially expressed genes. Fifty differentially expressed genes were identified. Nineteen have been classified in categories linked to stress or immune responses and among them; nine are part of the heat shock protein (HSP) family. Difference of expression for three (HSPD1, PRNP, SERPINH1) of the five selected genes were validated using real-time reverse transcriptionâpolymerase chain reaction. Enzyme linked immunosorbent assay was used to measure the protein level of heat shock protein 60 (HSP60), the protein encoded by HSPD1, and showed difference in AM protein level between allergic asthmatic and control subjects. In summary, this study suggests that HSP gene family, particularly HSP60, is involved in AM functions in a context of allergic asthma. These results also support the involvement of AM immune functions in the development of an allergic asthmatic response. Ten alveolar macrophage samples from bronchoalveolar lavages have been studied. Five of them are from allergic asthmatic subjects and five from control subjects (without allergy and asthma).
2010-07-29 | E-GEOD-22528 | biostudies-arrayexpress
Project description:The epigenome defines the cell type, but also possesses plasticity to tune gene expression in the context of extracellular cues. This tuning is evident in immune sentinel cells such as macrophages, which respond to pathogens and cytokines with phenotypic shifts driven by epigenomic reprogramming. Recent studies indicate that this reprogramming arises from the activity of transcription factors including nuclear factor kappa-light-chain-enhancer of activated B cells (NFκB). NFκB binds not only to available enhancers but may also produce de novo enhancers in previously silent areas of the genome. Here, we show that NFκB reprograms the macrophage epigenome in a stimulus-specific manner, in response only to a subset of pathogen-derived stimuli. The basis for these surprising differences lies in the stimulus-specific temporal dynamics of NFκB activity. In response to different stimuli, NFκB enters the nucleus with variable speed, amplitude, and duration, and may oscillate between the nucleus and cytoplasm. These dynamical features combine to specify the identity and dose of a given stimulus. We demonstrate through live cell imaging, mathematical modeling, and genetic perturbations that NFκB promotes open chromatin and formation of de novo enhancers most strongly when its dynamics are non-oscillatory. These de novo enhancers result in the activation of additional response genes. We propose a mechanistic paradigm in which the temporal dynamics of transcription factors are a key determinant of their capacity to control epigenomic reprogramming, thus enabling the formation of stimulus-specific memory in innate immune sentinel cells.
2021-01-01 | GSE146068 | 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.
2023-06-02 | PXD029715 | Pride
Project description: Not available
| S-SCDT-10_15252-EMBR_202255986 | biostudies-other
Project description:The implication of alveolar macrophages (AM) in asthma, a Th2 disease, has not been well characterized. Thus, the goal of this study is to better characterize AM phenotype of allergic asthmatic compared with normal subjects using genomic expression analyses. Microarray analyses were performed with AM isolated from bronchoalveolar lavage. Robust multiarray analysis (RMA) normalization and Smyth’s moderated t test were used to select differentially expressed genes. Fifty differentially expressed genes were identified. Nineteen have been classified in categories linked to stress or immune responses and among them; nine are part of the heat shock protein (HSP) family. Difference of expression for three (HSPD1, PRNP, SERPINH1) of the five selected genes were validated using real-time reverse transcription–polymerase chain reaction. Enzyme linked immunosorbent assay was used to measure the protein level of heat shock protein 60 (HSP60), the protein encoded by HSPD1, and showed difference in AM protein level between allergic asthmatic and control subjects. In summary, this study suggests that HSP gene family, particularly HSP60, is involved in AM functions in a context of allergic asthma. These results also support the involvement of AM immune functions in the development of an allergic asthmatic response.
2010-06-24 | GSE22528 | GEO