Biomarkers of Homestatic Dysregulation in Aging and Chronic Disease

衰老和慢性病中稳态失调的生物标志物

• 批准号: 8931648
• 负责人: Luigi Ferrucci
• 金额: $ 14.25万
• 依托单位: NATIONAL INSTITUTE ON AGING
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/8931648
• 关键词: Accounting; Address; Adult; Affect; Age; Aging; Aging-Related Process; Antioxidants; Autonomic nervous system; Baltimore; Basal metabolic rate; Biological; Biological Markers; Cell Respiration; Charge; Chronic; Chronic Disease; Clinical; Clinical Research; Cognitive; Collaborations; Complement; Data; Defect; Deterioration; Development; Disease susceptibility; Elderly; Elements; Endocrine system; Energy Metabolism; Environment; Epidemiologic Studies; Epidemiology; Equilibrium; Etiology; Evolution; Feedback; Generations; Health; Homeostasis; Hormones; Immune system; Impairment; Inflammatory; Inflammatory Response; Institution; Intake; Joints; Longitudinal Studies; Measures; Modeling; Morbidity - disease rate; Motivation; Motor; Muscle; Neuraxis; Neurologic; Nutrient; Outcome; Oxidative Stress; Oxygen; Parasympathetic Nervous System; Pathway interactions; Performance; Peripheral Nervous System; Phase; Physical activity; Physiological; Process; Production; Property; Reactive Oxygen Species; Research; Research Personnel; Sardinia; Scientist; Signal Transduction; Stress; Stressful Event; System; Testing; Women' s Health; base; bone; disability; frailty; free radical oxygen; high throughput screening; improved; macromolecule; mortality; nutrition; programs; repaired; sensory system

This project tests the hypothesis that the process that leads to disease susceptibility, disability and frailty in older persons largely constitutes a progressive dysregulation and reduced reserve capacity in the network of biological mechanisms that interact to maintain a stable energetic homeostasis and/or a defect or deficiency in the capacity to regain equilibrium when homeostasis is critically challenged by a stressful event. Elements comprising these networks are not completely defined but certainly include: 1. Intake of essential elements the body requires to create energy, including both nutrients and oxygen; 2. Activities that affect the different forms of energy utilization, including resting metabolic rate, physical activity, cognitive activity and nutrition; 3. Neurological control of energy flow, mostly affected by the interplay between the sympathetic and the parasympathetic nervous systems; 4. The endocrine system, which is also in charge of modulating the locoregional distribution of energy flow, but acts more slowly than the autonomic nervous system; 5. The production of Oxygen Free Radicals (ROS) during aerobic metabolism has important signaling properties but can also produce large damage to several macromolecules; 6. Ultimately, any type of damage triggers an inflammatory response, which in turn diverts energy utilization to the function(s) necessary for or in need of repair. Several biomarkers of the capacity and/or performance of these six systems have been developed over the last several years and some use high throughput assays that allow utilization in epidemiological studies. However, no current study has the broad range of information required to address the multysistem dysregulation hypothesis in an epidemiological setting. Therefore, we have identified several studies that include a subset of these measures that can be used to test one or more partial components of our general hypothesis. By creating a network of collaborations with the research groups conducting these studies, we have gained access to data that complement those that we already collect in the BLSA. In particular, in the context of this project, we intend to use data from: a. The Baltimore Longitudinal Study of Aging b. The InChianti Study c. The SardiNIA study d. The Women's Health and Aging Study e. The Health ABC Study f. The ICare/Dicomano Study g. The ASSI Italian Initiative h. The ILSA Study i. The Il Sirente Study l. The AGES study Collaborations between the LSS and investigators of these studies have been established. Other studies may be added to this initiative, based on opportunities and needs of the research group. In the intial period of this project, we will test the hypothesis of an independent correlation between the different homeostatic domains and their association with geriatric-relevant outcomes, such as morbidity, frailty, disability and mortality. In the second phase, we aim to study the effects on similar outcomes of multiple biomarkers and physiological measures, within a specific domain and across different domains. The second part of this project requires some methodological and statistical development. This methodological component is considered an essential component of the project and will be conducted in collaboration with multiple academic institutions.

该项目检验的假设是，导致老年人易患疾病、残疾和虚弱的过程主要是相互作用以维持稳定的能量稳态的生物机制网络中的进行性失调和储备能力降低，和/或在稳态受到压力事件严重挑战时恢复平衡的能力缺陷或不足。构成这些网络的元素没有完全定义，但肯定包括：1。摄入身体需要的基本元素来创造能量，包括营养素和氧气; 2.影响不同形式能量利用的活动，包括静息代谢率、体力活动、认知活动和营养; 3.能量流的神经控制，主要受交感神经系统和副交感神经系统之间的相互作用的影响; 4.内分泌系统也负责调节能量流的局部分布，但比自主神经系统作用更慢; 5.有氧代谢过程中氧自由基（ROS）的产生具有重要的信号传导特性，但也会对几种大分子产生较大的损伤; 6.最终，任何类型的损伤都会引发炎症反应，从而将能量利用转移到修复所需的功能上。 在过去的几年中，已经开发了这六种系统的能力和/或性能的几种生物标志物，其中一些使用高通量测定，允许在流行病学研究中使用。然而，目前还没有一项研究具有广泛的信息来解决流行病学背景下的多系统失调假说。因此，我们已经确定了几项研究，其中包括这些措施的子集，可用于测试我们的一般假设的一个或多个部分组成部分。通过与进行这些研究的研究小组建立合作网络，我们获得了对我们已经在BLSA中收集的数据进行补充的数据。 特别是，在本项目中，我们打算使用来自以下方面的数据： a.巴尔的摩老龄化纵向研究 B. InChianti研究 C. Sardinia研究 D.妇女健康与老龄化研究 e.健康ABC研究 F. ICare/Dicomano研究 G. ASSI意大利倡议 H. ILSA研究 I. Sirente研究 L. AGES研究 LSS和这些研究的研究者之间已经建立了合作关系。根据研究小组的机会和需求，其他研究可能会添加到该计划中。 在本项目的初期，我们将检验不同稳态域之间的独立相关性及其与老年相关结果（如发病率、虚弱、残疾和死亡率）之间的关联的假设。在第二阶段，我们的目标是研究在特定领域和不同领域内多种生物标志物和生理指标对相似结果的影响。该项目的第二部分需要在方法和统计方面有所发展。这一方法构成部分被认为是该项目的一个重要组成部分，将与多个学术机构合作进行。