BIOBEHAVIOR, ETHNICITY, HORMONES & BLOOD PRESSURE

高血压和高血压相关疾病的种族差异可能 这是由于调节血压(BP)的机制和 BP反应性。这个项目将研究血浆与 胰岛素一方面与血压(BP)和血压的反应性有关 其他因素与肥胖、脂肪分布、脂蛋白谱、 儿茶酚胺浓度、钠通量和离子钙 集中精神。这项拟议的研究将检查480名健康的男性和女性 年龄25-44岁，来自三个民族：1)非西班牙裔白人；2)黑人 非西班牙裔美国人；以及3)古巴裔美国白人。我们将评估BP和BP 三种实验条件下的反应性：1)静止；2)反应 实验室中的三项标准化行为任务；以及3)当 在自然主义的环境中行走。心理社会的几个维度 行为将被衡量，包括愤怒和敌意。我们将量化 几种激素，包括胰岛素(空腹和葡萄糖负荷后)， 肾上腺素和去甲肾上腺素，皮质醇，血浆肾素活性，以及 为了更好地研究它们与BP的相互关系。我们还将 探讨钠转运对血压的影响及其机制 钠的运输受荷尔蒙的影响。此外，荷尔蒙的作用 关于脂蛋白谱的种族差异将被研究。民族 肥胖、脂肪分布、体力活动和其他方面的差异 协变量将在分析中考虑在内。这项研究应该 提供有价值的见解，了解生物行为 各种因素相互作用，影响血压调节。

Ethnic differences in hypertension and hypertension-related diseases may be due to differences in the mechanisms regulating blood pressure (BP) and BP reactivity. This project will examine the relationship between plasma insulin on the one hand and blood pressure (BP) and BP reactivity on the other as a function of obesity, fat distribution, lipoprotein profile, catecholamine concentrations, sodium flux, and ionized calcium concentration. The proposed study will examine 480 healthy men and women aged 25-44 years from three ethnic groups: 1) white nonHispanics; 2) black non-Hispanics; and 3) white Cuban Americans. We will assess BP and BP reactivity under three experimental conditions: 1) at rest; 2) in response to three standardized behavioral tasks in the laboratory; and 3) while ambulatory in naturalistic settings. Several psychosocial dimensions of behavior will be measured including anger and hostility. We will quantitate several hormones including insulin (fasting and after a glucose load), epinephrine and norepinephrine, cortisol, plasma renin activity, and aldosterone to better study their interrelationships with BP. We will also investigate the influence of sodium transport on blood pressure and how sodium transport is effected by hormones. In addition, the role of hormones on ethnic differences in the lipoprotein profile will be studied. Ethnic differences in obesity, fat distribution, physical activity and other covariates will be taken into account in the analyses. This study should provide valuable insight into mechanisms through which biobehavioral factors interact to affect blood pressure regulation.