Autonomic function/insulin resistance/multiethnic popul

自主神经功能/胰岛素抵抗/多种族人群

• 批准号: 6801116
• 负责人: ANDREW GRANDINETTI
• 金额: $ 30.36万
• 依托单位: UNIVERSITY OF HAWAII AT MANOA
• 依托单位国家: 美国
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-15 至 2008-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6801116
• 关键词: Asian Americans; Hawaii; Hawaiian; autonomic nervous system; blood lipid; blood pressure; body composition; cardiovascular disorder; cardiovascular function; caucasian American; clinical research; glucose tolerance; human subject; insulin sensitivity /resistance; nervous system disorder; neuroregulation; nutrient intake activity; obesity; physical fitness; questionnaires; racial /ethnic difference

DESCRIPTION (provided by the applicant): Autonomic nervous system regulation of heartbeat variability is often disrupted among patients with diabetes. Moreover, reduced heart rate variability has been associated with increased Cardiovascular Disease (CVD) mortality among diabetic and non-diabetic populations. CVD mortality rates differ greatly among many ethnic groups. In Hawaii, Native Hawaiians have been shown to have disproportionately higher CVD mortality than Asian and Caucasian groups. Preliminary data from the Native Hawaiian Health Research Project suggest that conventional risk factors associated with Atherosclerosis may not fully account for ethnic disparities in heart disease and stroke mortality rates in Hawaii. Insulin resistance has been associated with increased CVD incidence and mortality, and has also been associated with reduced heart rate variability. The proposed study will investigate the relationship between insulin resistance and autonomic regulation of cardiac function in a multi-ethnic population. The proposed research will also provide baseline data for future longitudinal studies that will investigate the extent to which these novel risk factors explain ethnic disparities in CVD mortality in Hawaii. The findings of the proposed study may have important implications with regards to the treatment of insulin resistance as an independent CVD risk factor. Specific Aims: Collaborator component (Aim #1). Establish a collaborative laboratory in Hawaii for the evaluation of autonomic function in a multiethnic population. Principal Investigator component (Aim #2). Investigate the relationship between insulin resistance, body-fat distribution, and autonomic function. (Aim #3) Establish a cohort with baseline measures of autonomic function and insulin resistance that will serve as a study population for R01-supported longitudinal studies. Hypotheses: By fulfilling these specific aims, we propose to test the following specific research hypotheses: (1.) Autonomic function will differ significantly by ethnicity, after adjustment for age, gender, body-mass index, and central obesity. (2.) Insulin resistance is independently associated with autonomic function, after an adjustment for age, gender, body-mass index, and central obesity. Secondary Questions: Does insulin resistance and plasma glucose interact, in their effects on autonomic function? What role do plasma lipids, blood pressure, diet, and physical activity have in explaining any observed ethnic disparities in autonomic function? Is the questionnaire-derived Composite Autonomic Symptom Scale (COMPASS) correlated with autonomic function in Hawaii's multiethnic population?

描述（由申请人提供）：糖尿病患者的自主神经系统对心跳变异性的调节经常被破坏。 此外，心率变异性降低与糖尿病和非糖尿病人群中心血管疾病（CVD）死亡率增加相关。 许多族裔群体的心血管疾病死亡率差异很大。 在夏威夷，夏威夷原住民的心血管疾病死亡率高于亚洲和高加索人群。 夏威夷土著健康研究项目的初步数据表明，与动脉粥样硬化相关的传统危险因素可能无法完全解释夏威夷心脏病和中风死亡率的种族差异。 胰岛素抵抗与CVD发病率和死亡率增加相关，并且还与心率变异性降低相关。 拟议的研究将调查多种族人群中胰岛素抵抗与心脏功能自主调节之间的关系。 拟议的研究还将为未来的纵向研究提供基线数据，这些纵向研究将调查这些新的风险因素在多大程度上解释夏威夷CVD死亡率的种族差异。 这项研究的结果可能对胰岛素抵抗作为一个独立的心血管疾病危险因素的治疗有重要意义。 具体目标：协作者组件（目标#1）。 在夏威夷建立一个合作实验室，以评估多民族人群的自主神经功能。 主要研究者组成部分（目标#2）。 研究胰岛素抵抗、体脂分布和自主神经功能之间的关系。 (Aim#3）建立具有自主神经功能和胰岛素抵抗的基线测量的队列，其将作为R01支持的纵向研究的研究人群。 假设：通过实现这些具体目标，我们提出了以下具体的研究假设：（1）。在校正年龄、性别、体重指数和中心性肥胖后，不同种族的自主神经功能有显著差异。 （2.）在校正年龄、性别、体重指数和向心性肥胖后，胰岛素抵抗与自主神经功能独立相关。 次要问题：胰岛素抵抗和血糖是否相互作用，影响自主神经功能？ 血脂、血压、饮食和体力活动在解释任何观察到的自主神经功能的种族差异中起什么作用？ 在夏威夷的多种族人群中，由Ammire导出的复合自主神经症状量表（COMPASS）与自主神经功能相关吗？