CARDIOVASCULAR AND HIV/AIDS EFFECTS ON BRAIN STRUCTURE/FUNCTION AND COGNITION

这个子项目是利用资源的许多研究子项目之一。 由NIH/NCRR资助的中心拨款提供。对子项目的主要支持 子项目的首席调查员可能是由其他来源提供的， 包括美国国立卫生研究院的其他来源。为子项目列出的总成本可能 表示该子项目使用的中心基础设施的估计数量， 不是由NCRR赠款提供给次级项目或次级项目工作人员的直接资金。 2004年，50岁以上的艾滋病毒/艾滋病感染者占所有病例的比例上升到22.5%。我们对年龄和艾滋病毒/艾滋病如何相互作用缺乏了解正变得越来越成问题，尤其是在艾滋病的神经认知表现领域，因为年龄本身就是神经认知综合征的重要预测因素。尽管已知年龄与各种神经精神疾病--包括痴呆症--之间的联系，但直到最近，人们才对艾滋病毒/艾滋病、衰老和神经精神症状之间的可能相互作用给予了极大的关注。这项申请的目的是获得资金，以比较和对比与艾滋病毒/艾滋病相关的脑结构和功能异常作为心血管异常的功能。随着心血管疾病的发病率随着年龄的增长而增加，这些疾病的后果也会随之增加，包括大脑中的小血管异常、灰质体积减少、白质完整性改变以及局部脑血流的变化。了解艾滋病毒如何影响这些正常的衰老后果，对于临床护理、开发新的治疗策略以及了解艾滋病毒相关神经认知障碍的病理生理都很重要。我们将评估参与多中心艾滋病队列研究(MACS)心血管分研究的340名男性的心血管、认知和脑结构/功能状况。我们将利用近25年的临床和神经心理学数据，结合新的CVD变量(例如冠状动脉钙、颈动脉内膜中层厚度)和MRI表现(解剖、扩散成像、血流和光谱学)来解决一系列与脑结构和功能异常相关的假说，以及它们与CVD变量、HIV血清状态和HIV感染严重程度的标记之间的关系。我们将使用研究参与者的横截面和纵向数据来评估这个模型，这些参与者的年龄从50岁到75岁不等。我们认为，HIV和CVD对大脑结构/功能有直接影响，中枢神经系统的完整性是认知功能的直接联系；CVD本身是通过年龄增长预测的。我们预测，艾滋病毒感染减缓了心血管疾病和脑结构之间的通路的强度。也就是说，相对于未感染艾滋病毒的男性，脑血管疾病对大脑结构/功能的影响将在感染艾滋病毒的男性中得到增强。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. Primary support for the subproject and the subproject's principal investigator may have been provided by other sources, including other NIH sources. The Total Cost listed for the subproject likely represents the estimated amount of Center infrastructure utilized by the subproject, not direct funding provided by the NCRR grant to the subproject or subproject staff. The proportion of persons living with HIV/AIDS who are over 50 rose to 22.5% of all cases in 2004. Our lack of understanding about how age and HIV/AIDS interact is becoming increasingly problematic, no more so than in the area of the neurocognitive manifestations of AIDS, since age is itself an important predictor of neurocognitive syndromes. In spite of the known links between age and various neuropsychiatric disorders - including dementia - it has only been recently that much attention has been paid to the possible interactions between HIV/AIDS, aging and neuropsychiatric presentation. The purpose of this application is to obtain funding to compare and contrast brain structural and functional abnormalities associated with HIV/AIDS as a function of cardiovascular abnormalities. As the rate of cardiovascular disease increases with age, so too do the consequences of those disorders including small vessel abnormalities in the brain, decreased grey matter volume, altered white matter integrity, and changes in regional cerebral blood flow. Understanding how these normal consequences of aging are affected by HIV is important for clinical care, the development of new treatment strategies, and understanding the pathophysiology of HIV-Associated Neurocognitive Disorder. We will evaluate the cardiovascular, cognitive, and brain structure/function status of 340 men participating in the cardiovascular substudy of the Multicenter AIDS Cohort Study (MACS). We will take advantage of the nearly 25 years of prior clinical and neuropsychological data, combined with the new CVD variables (e.g., coronary calcium, carotid intima-media thickness) and MRI findings (anatomic, diffusion imaging, blood flow, and spectroscopy) to address a series of linked hypotheses concerning brain structural and functional abnormalities, and their relationship to CVD variables, HIV serostatus, and markers of the severity of the HIV infection. We will evaluate this model by using both cross-sectional and longitudinal data from the study participants who range in age from 50 to 75 years old. We propose that HIV and CVD have direct effects on brain structure/function, and that CNS integrity is the direct link to cognitive functions; CVD is itself predicted by advancing age. We predict that HIV infection moderates the strength of the pathway between CVD and brain structure. That is, the effects of CVD on brain structure/function will be augmented in the HIV-infected men relative to the uninfected men.