Alcohol-Induced Mitochondrial Derangements Cause Alveolar Macrophage Dysfunction

酒精引起的线粒体紊乱导致肺泡巨噬细胞功能障碍

基本信息

批准号：
10091551
负责人：
Samantha M. Yeligar
金额：
$ 7.04万
依托单位：
EMORY UNIVERSITY
依托单位国家：
美国
项目类别：
财政年份：
2018
资助国家：
美国
起止时间：
2018-07-01 至 2023-04-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/10091551
关键词：
Adult Respiratory Distress Syndrome Affect Alcohol consumption Alcohols Alveolar Alveolar Macrophages Automobile Driving Binding Sites Bioenergetics CCAAT-Enhancer-Binding Protein-alpha Cell Line Complex Data Disease Down-Regulation Electron Transport Equilibrium Ethanol Foundations Functional disorder Future Gene Expression Genetic Transcription Immune response Impairment In Vitro Infection Intervention Invaded Klebsiella pneumoniae Lung Lung Capacity Lung diseases Lung infections Mediating Mediator of activation protein Membrane Potentials Metabolic Metabolic dysfunction Metabolism Methods MicroRNAs Microbe Mitochondria Mitochondrial DNA Molecular Morbidity - disease rate Mus Oranges Oxidation-Reduction Oxidative Stress Pathogenicity Patients Phagocyte Bactericidal Dysfunction Phagocytes Phagocytosis Predisposition Production Reactive Oxygen Species Recording of previous events Regulation Respiratory Tract Infections Risk Role SOD2 gene Small Interfering RNA Staphylococcus aureus Time Transcription Factor AP-1 Transcriptional Regulation Up-Regulation alcohol effect alcohol exposure alcohol use disorder catalase chronic alcohol ingestion human subject immune function improved in silico in vivo infection risk inhibitor/antagonist innovation macrophage mitochondrial dysfunction mitochondrial membrane mortality mouse model new therapeutic target non-alcoholic overexpression pathogen preclinical study premature problem drinker promoter targeted treatment transcription factor translational study uptake

项目摘要

PROJECT SUMMARY/ABSTRACT: Patients with alcohol use disorders (AUD) are 2-4 times more susceptible to developing respiratory infections and acute respiratory distress syndrome, compared to non-alcoholic subjects. In the lung, alveolar macrophages (AM) are the first line of cellular defense in the alveolar space, and they function to phagocytize and clear invading pathogens. However, chronic alcohol ingestion increases mitochondria (MT)-derived oxidative stress and MT dysfunction, which impairs AM phagocytosis and increases risk for infections. In the proposed studies, the PI will examine the effects of alcohol-induced MT-derived oxidative stress on AM phagocytic dysfunction and susceptibility to infections (Aim 1). The PI will then elucidate the molecular mechanisms involved in alcohol-induced MT derangements, including fragmentation and dysfunction (Aim 2). Finally, since transcription factor B1, mitochondrial (TFB1M) is a critical mediator of MT DNA and MT gene transcription, the PI will determine the effect of alcohol on AM TFB1M expression and activity as modulated by microRNAs (Aim 3). These hypotheses will be investigated by using a mouse model of chronic alcohol consumption, an in vitro ethanol exposed mouse AM cell line, MH-S, and AM isolated from human subjects with AUD. The objectives of the studies outlined in this proposal are to elucidate the molecular mechanisms responsible for phagocytic dysfunction in alcoholic AM and identify novel and therapeutically targetable molecules responsible for EtOH-induced MT dysfunction. If successful, the proposed studies will identify novel therapeutic targets for future translational studies that could impact the management of patients with a history of AUD who are at risk for significant lung disorders, even during continued alcohol use, or potentially patients with disorders characterized by similar MT dysfunction.

项目概要/摘要：患有酒精使用障碍 (AUD) 的患者患呼吸道疾病的可能性高出 2-4 倍与非酒精受试者相比，感染和急性呼吸窘迫综合征。在肺、肺泡巨噬细胞 (AM) 是肺泡腔细胞防御的第一道防线，其功能是吞噬并清除入侵的病原体。然而，长期饮酒会增加线粒体（MT）衍生的氧化应激和 MT 功能障碍会损害 AM 吞噬作用并增加感染风险。在拟议的研究中，PI 将检查酒精诱导的 MT 衍生的氧化应激对 AM 的影响吞噬功能障碍和感染易感性（目标 1）。然后 PI 将阐明分子酒精引起的 MT 紊乱的机制，包括碎片和功能障碍（目标 2）。最后，由于转录因子B1，线粒体（TFB1M）是MT DNA和MT基因的关键介质转录后，PI 将确定酒精对 AM TFB1M 表达和活性的影响（受调节） microRNA（目标 3）。这些假设将通过使用慢性酒精小鼠模型进行研究消耗，体外乙醇暴露的小鼠 AM 细胞系、MH-S 和从人类受试者中分离的 AM 与澳元。本提案中概述的研究目的是阐明分子机制造成酒精性 AM 吞噬功能障碍的原因，并确定新颖且可治疗的靶点负责 EtOH 诱导 MT 功能障碍的分子。如果成功，拟议的研究将为未来的转化研究确定新的治疗靶点这可能会影响有 AUD 病史、有严重肺病风险的患者的治疗疾病，甚至在持续饮酒期间，或可能患有具有类似 MT 特征的疾病的患者功能障碍。