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Nuclear Receptor REV-ERB alpha Role in the Pathophysiology of Allergic Asthma

核受体 REV-ERB α 在过敏性哮喘病理生理学中的作用

基本信息

批准号：
10643859
负责人：
Isaac Kirubakaran Sundar
金额：
$ 38.78万
依托单位：
UNIVERSITY OF KANSAS MEDICAL CENTER
依托单位国家：
美国
项目类别：
财政年份：
2021
资助国家：
美国
起止时间：
2021-02-20 至 2024-06-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/10643859
关键词：
ARNTL gene Acute Adrenal Cortex Hormones Affect Agonist Agreement Allergens Asthma Attenuated Binding Biological Biological Clocks Cell physiology Cells Circadian Dysregulation Circadian Rhythms Clinical Combined Modality Therapy Data Dependence Epithelial Cells Epithelium Etiology Exposure to Extrinsic asthma Functional disorder Gene Expression Genes Genetic Genetic Transcription Goblet Cells HDAC3 gene Hour House Dust Mite Allergens Household Human Hyperplasia IgE Immune Immune response Immunity Immunomodulators In Vitro Inflammation Inflammatory Response Inhalation Interleukin-4 Interleukin-6 Knock-out Knockout Mice Link Liquid substance Lung Measures Mediating Metabolism Metaplasia Molecular Mucins Mucous body substance Mus Nuclear Nuclear Receptors Patients Pharmaceutical Preparations Phenotype Plasma Play Production Proteins Pulmonary Inflammation Pyroglyphidae Reaction Time Repression Repressor Proteins Research Response Elements Role STAT3 gene Serum Severities Specificity Symptoms System Testing Time Tissues Variant Wild Type Mouse airway epithelium airway hyperresponsiveness airway inflammation allergic airway inflammation allergic response antagonist asthma exacerbation asthma model asthmatic bronchial epithelium cell type chronic inflammatory disease chronic inflammatory lung disease circadian circadian pacemaker circadian transcriptome cytokine design genetic corepressor immune activation immunoregulation in vivo inhibitor molecular clock mouse model novel pharmacologic prevent promoter pulmonary function recruit response small molecule transcription factor transcriptome sequencing translational potential

项目摘要

SUMMARY: Allergic asthma is a chronic inflammatory disease that displays time-of-day dependent variations in clinical symptoms and severity. Though inhaled (or systemic) corticosteroids and sympathetic inhibitors are commonly used to alleviate the immediate impact of asthma on airway function, these drugs are mostly ineffective. Intriguingly, asthmatics show abnormal circadian rhythms of lung function, and mucus production associated with increased lung inflammation and exacerbations. REV-ERBα is a nuclear receptor and transcription factor that plays a critical role in the circadian timing system, acting to maintain daily rhythms of gene expression linked to immunity, inflammation and metabolism. Our preliminary data show that reduced expression of REV-ERBα in the airway epithelium of mouse lungs following exposure to the House Dust Mite (HDM) allergen is associated with augmented asthmatic lung phenotypes (increased airway inflammation, airway hyperresponsiveness, Th2 cytokines, plasma IgE and mucous metaplasia). This data agrees with studies showing that REV-ERBα expression is downregulated in mouse models of asthma and in human airway cells recovered from asthmatics. Together, these data suggests that REV-ERBα may contribute to the pathophysiology of allergic asthma and represent a novel target for alleviating the immune-inflammatory response. However, there is no data describing the molecular mechanism, whereby REV-ERBα may contribute to the pathobiology of allergic asthma. We hypothesize that allergen-induced disruption of REV-ERBα expression leads to irregular clock function and enhanced immune-inflammatory response in the lungs. Aim 1: Determine the role of REV-ERBα in recruitment of immune cells into the lung during allergic asthma. We will measure lung immune-inflammatory response over time and global circadian transcriptome by RNA-sequencing (RNA-seq) following acute HDM exposure at two different times of the day (AM vs. PM) in Rev-erbα knockout and wild-type mice. Aim 2: Determine if small molecule activation of REV-ERBα can prevent and/or attenuate airway inflammation and asthmatic lung phenotypes by repressing NFIL3-STAT3 axis in vivo. We will employ both genetic and pharmacological approaches to determine if activation of REV-ERBα can protect and/or attenuate allergic asthma. Target specificity and cell- type dependency will be determined using RNA-seq analysis. Aim 3: Determine the mechanism how HDM/Th2 cytokines suppress REV-ERBα expression in the epithelium leading to epithelial barrier dysfunction and goblet cell hyperplasia in vitro. We will treat primary human bronchial epithelial cells and EpiAirway tissues (normal and asthmatics) to HDM/Th2 cytokines with or without treatment with selective REV- ERBα agonists/antagonists or a STAT3 inhibitor. This will determine how NFIL3-STAT3 axis represses REV- ERBα function in Th2 cytokine-induced barrier dysfunction and goblet cell hyperplasia. Overall, this study will delineate the novel role of REV-ERBα in the clock-dependent pathophysiological response to allergic asthma.

摘要：过敏性哮喘是一种慢性炎症性疾病，表现出一天中时间依赖性的变化