The Dallas Asthma Brain and Cognition Study (Dallas ABC Study)

达拉斯哮喘大脑和认知研究（达拉斯 ABC 研究）

基本信息

批准号：
10219346
负责人：
E SHERWOOD BROWN
金额：
$ 72.55万
依托单位：
SOUTHERN METHODIST 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：
2018-07-15 至 2024-05-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/10219346
关键词：
Adrenal Cortex Hormones Adult Adult asthma Adverse effects Affect Age Aging Airway Disease Asthma Brain Brain imaging Chemistry Chronic Clinical Cognition Cognitive Cognitive deficits Dementia Depression screen Diagnosis Diffusion Diffusion Magnetic Resonance Imaging Elderly Episodic memory Financial Hardship Functional Magnetic Resonance Imaging Future Goals Hippocampus (Brain)Impaired cognition Individual Inflammation Inflammatory Inhalation Inositol Intake Interdisciplinary Study Life Link Longevity Lung diseases Magnetic Resonance Imaging Magnetic Resonance Spectroscopy Measures Mediating Mediation Mediator of activation protein Memory Memory impairment Mental Health Moods N-acetylaspartate Nerve Degeneration Neuraxis Neurons Neuropsychological Tests Neuropsychology Outcome Parietal Participant Pathway interactions Patients Performance Pharmaceutical Preparations Pharmacological Treatment Population Prevalence Process Protons Quality of life Reporting Research Research Personnel Rest Risk Role Scanning Services Severities Severity of illness Short-Term Memory Sleep Societies Structural Biochemistry Structural Chemistry Structure Symptoms Time United States age effect age related aged aging brain airway inflammation asthmatic patient biobehavior cognitive ability cognitive control cognitive function cognitive testing dementia risk depressive symptoms economic cost executive function experience functional MRI scan gray matter illness length memory encoding middle age mild cognitive impairment mortality neuroimaging neurophysiology nitrosative stress patient population preventive intervention processing speed relating to nervous system response sleep quality systemic inflammatory response trend white matter

项目摘要

Abstract Asthma is a chronic inflammatory airway disease, with an increasing prevalence, that is associated with a substantial burden on quality of life for patients and financial burden on society. Despite progress in the pharmacological treatment, overall asthma control remains unsatisfactory and treatment non-adherence is extremely high. The available research, much of which was conducted by investigators on this proposal, suggests that asthma may be associated with changes in brain structure and biochemistry, as well as increased risk for cognitive impairment and dementia. However, little is known about the impact of asthma on cognitive function and associated central nervous system processes, especially for in middle- to older age patients. Prior research has also not characterized the relationship between key domains of cognitive function and possible changes in brain structure, chemistry, and function specific to asthma. Additionally, the role of biobehavioral factors (such as mood, sleep, or inflammation) and asthma-specific factors (severity, duration, medication, airway inflammation) in explaining some of these deficits in asthma and aging has not been explored. We therefore propose to compare 126 adults 40-69 years old, diagnosed with asthma, and stratified for age (three decades) and asthma severity, with 66 age-matched non-asthmatic controls using cognitive tests that include processing speed, episodic memory, and executive function. Participants will also undergo neuroimaging. Structural magnetic resonance imaging (MRI) will focus on hippocampal volume. Diffusion tensor imaging (DTI) will be used to measure integrity of white matter integrity, which is associated with processing speed. Proton magnetic resonance spectroscopy (1HMRS) will measure metabolites linked to neuronal degeneration (N-acetyl aspartate, NAA) and glial inflammation (myo-inositol, mI). Three functional MRI scans will measure brain activity under different cognitive conditions: (a) a resting state scan to examine functional connectivity of brain networks; (b) a subsequent memory task to assess the role of hippocampal activation in the service of memory encoding, and (c) a modulation task that measures the ability of the cognitive control network to increase brain activity in fronto-parietal regions as task demands increase. We will also examine whether cognitive impairments are mediated by distinct brain changes extrapolated from prior research on aging and pilot research on respiratory disease. In addition, we will study a potential role of depressive mood, sleep quality and systemic inflammation, as well as asthma-relevant variables in mediating these associations. We hypothesize that asthma patients, compared to controls, will demonstrate accelerated brain aging as demonstrated by cognitive deficits and brain changes, which increase in magnitude with older age. Thus, this proposal will provide fundamental information to develop future preventative and intervention efforts to mitigate the potentially adverse effects of asthma on brain and cognition. A multidisciplinary research team with extensive experience in mental health in asthma patients, as well as neuroimaging across the lifespan will conduct the study.

抽象的哮喘是一种慢性炎症性气道疾病，患病率越来越高，与患者的生活质量和社会经济负担很大。尽管进展药理治疗，总体哮喘控制仍然不令人满意，不遵守治疗是极高。可用的研究，其中大部分是由调查人员就此提案进行的表明哮喘可能与大脑结构和生物化学的变化以及认知障碍和痴呆症的风险增加。但是，关于哮喘对哮喘的影响知之甚少认知功能和相关的中枢神经系统过程，尤其是在中年至更大的年龄患者。先前的研究还没有表征认知功能的关键领域之间的关系以及大脑结构，化学和功能的可能变化。另外，生物行为因素（例如情绪，睡眠或炎症）和哮喘特异性因素（严重程度，持续时间，药物，气道炎症）解释哮喘和衰老中的一些缺陷探索。因此，我们建议比较40-69岁的126名成年人，被诊断为哮喘和分层对于年龄（三十年）和哮喘的严重程度，使用认知测试具有66个年龄匹配的非心律对照其中包括处理速度，情节记忆和执行功能。参与者也会经历神经影像学。结构磁共振成像（MRI）将集中在海马体积上。扩散张量成像（DTI）将用于测量白质完整性的完整性，这与处理速度。质子磁共振光谱（1HMR）将测量与神经元变性（N-乙酰基天冬氨酸，NAA）和神经胶质炎症（Myo-Insitol，MI）。三个功能 MRI扫描将在不同的认知条件下测量大脑活动：（a）静止状态扫描以检查大脑网络的功能连通性；（b）随后评估海马作用的记忆任务在为内存编码服务中激活，以及（c）调制任务，以测量随着任务需求的增加，认知控制网络以增加额顶区域的大脑活动。我们将还要检查认知障碍是否是由从先前推断的不同大脑变化介导的关于呼吸道疾病衰老和试点研究的研究。此外，我们将研究抑郁情绪，睡眠质量和全身性炎症，以及与哮喘相关的变量这些关联。我们假设与对照组相比，哮喘患者将表现出加速认知缺陷和大脑变化所证明的大脑衰老，随着年龄较大的幅度增加年龄。因此，该提案将提供基本信息，以开发未来的预防和干预减轻哮喘对大脑和认知的潜在不利影响的努力。一项多学科研究在哮喘患者中具有丰富心理健康经验的团队，以及在整个哮喘患者中的神经影像寿命将进行研究。