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REVERSE CHOLESTEROL TRANSPORT IN HUMANS

人体中的胆固醇反向转运

基本信息

批准号：
8403769
负责人：
RICHARD E. OSTLUND
金额：
$ 48.98万
依托单位：
WASHINGTON UNIVERSITY
依托单位国家：
美国
项目类别：
财政年份：
2012
资助国家：
美国
起止时间：
2012-01-01 至 2015-11-30
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/8403769
关键词：
Address Affect Animals Bile Acids Biochemical Biological Assay Biological Markers Blood Blood Circulation Catabolism Cholesterol Cholesterol Homeostasis Clinical Trials Complex Consumption Coronary heart disease Data Diet Dietary Cholesterol Disease Outcome Double-Blind Method Drug effect disorder Drug usage Epidemiology Excretory function Fat emulsion Filtration Future Heart Diseases Human In Vitro Indium Individual Institutional Review Boards Intestines Intravenous Ions Kinetics Knowledge Label Laboratories Lead Lipoproteins Liver Low-Density Lipoproteins Mass Spectrum Analysis Measurement Measures Metabolic Methods Missouri Oral Pathway interactions Pharmaceutical Preparations Pharmacotherapy Pharmacy facility Phytosterols Placebo Control Placebos Plasma Preparation Public Health Publishing Randomized Regulation Reporting Research Steroids Sterols Technology Testing Therapeutic Thick Tissues Tracer Translating Work cholesterol absorption cholesterol biosynthesis clinically relevant ezetimibe heart disease risk human subject improved innovation innovative technologies intima media novel prevent reverse cholesterol transport stable isotope tool

项目摘要

Project Summary The central hypothesis of this proposal is that reverse cholesterol transport is related to coronary heart disease (CHD) risk. It is complementary to the concept that reduction of cholesterol biosynthesis with statin drugs prevents CHD, but it focuses on whole body cholesterol metabolism and kinetic cholesterol transport rather than on static levels of circulating lipoproteins. Although this is an old idea, it has not been adequately tested in humans because of lack of suitable methods. In this proposal we will apply innovative stable isotope and mass spectroscopic technology to study reverse cholesterol transport in human subjects. The first specific aim is to improve the preparation of intravenous deuterated cholesterol tracer, a critical limiting element in the study of whole body cholesterol metabolism. The second aim is to use that intravenous tracer, along with a different oral tracer, to partition fecal cholesterol into excreted endogenous cholesterol, unabsorbed dietary cholesterol and newly-synthesized cholesterol derived from the liver and intestine. Measurements will be made during consumption of a controlled diet provided by the metabolic kitchen. The pool size of the rapidly-mixing body cholesterol pool will be measured along with the fractional rate of cholesterol catabolism. These direct measures of reverse cholesterol transport will be correlated with plasma biomarkers and with metabolic covariates. The relation of reverse cholesterol transport to carotid intima-media thickness will be determined. The third specific aim will use similar methods to study the mechanism of action for the widely-used drug ezetimibe. Changes in fractional endogenous cholesterol excretion and related measures will be determined after ezetimibe or placebo treatment in a clinical trial. This work represents a new direction for cholesterol research with the potential to develop new and complementary methods of reducing CHD risk that can be added to diet and statin drug treatment.

项目总结