The risk and benefits of hormone replacement therapy (HRT) have come under increased concern in recent years because of the results of the HERS and WHI trials, the increased risk of breast cancer, new therapies, i.e., SERMs and lipid lowering drugs, bisphosphorates, and better understanding of hormone metabolism and disease. We have shown in several studies that the potential benefits of HRT are limited by lifestyle, cofactors, specifically weight gain, obesity and increased visceral abdominal fat associated metabolic changes in lipoproteins, inflammatory markers and estrogen metabolites. We are proposing a randomized trial of 500 women, on HRT for at least two years, aged 52-60 years, and three or more years postmenopausal to test whether reduction in waist circumference, triglycerides, dense LDLc, number of LDL particles, CPR, PAI-I by aggressive diet exercise, versus a health education control will decrease progression or result in regression of measures of subclinical vascular disease. The intervention is designed to reduce total fat intake to 17 percent of calories, 1300 kilo calories, and increase moderate activity to 150-240 minutes per week to obtain a 10 percent reduction in weight. The primary endpoint will be a 20 percent or at least a 20 mg decrease in triglyceride levels, a 5 cm decrease in waist circumference, and a 10 percent decrease in LDLc. This will result in changes in subclinical measurements including carotid ultrasound, electron beam computer tomography of the coronary and aorta, pulse wave velocity, endothelial function, and tonometry of the radial artery. NMR spectroscopy of lipoproteins, inflammatory markers, and estrogen metabolites will also be evaluated. Therefore, the primary goal of this trial is the modification of measures of subclinical disease among HRT users.

National Institute of Health (NIH)
National Heart, Lung, and Blood Institute (NHLBI)
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Epidemiology and Disease Control Subcommittee 2 (EDC)
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Fleg, Jerome
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University of Pittsburgh
Public Health & Prev Medicine
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