The Long-Term Effect of Viscous Fibers, Soy Protein, and Plant Sterol Foods in Combination on Serum Cholesterol and Other Risk Factors for Cardiovascular Disease
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 66
- 试验地点
- 2
- 主要终点
- LDL cholesterol
研究概览
简要总结
The purpose of this study is to evaluate the long term effectiveness of the dietary portfolio, consisting of viscous fibers, soy products, nuts and plant sterols, as well as the effects of removing single food components from the dietary portfolio on cholesterol reduction and other cardiovascular risk factors.
详细描述
We have shown in 1-month metabolic studies that a dietary portfolio, consisting of soy products, viscous fibers, almonds and plant sterols in the form of margarine, can lower cholesterol to the same extent as first generation statins (cholesterol-lowering drugs). However, the long-term effectiveness of the dietary portfolio is not known. Furthermore, it is not known to what extent each of the food components contribute to the cholesterol reductions observed. We wish to therefore evaluate the long term effects of the dietary portfolio as well as the effects of removing single food components from the dietary portfolio on cholesterol reduction and other cardiovascular risk factors. We believe the removal of single food components will result in a reduction of the cholesterol-lowering effect to a similar extent as predicted with the cholesterol reductions observed when the food component is consumed alone.
Method:
66 subjects will be recruited for a 6-month to 5 year long-term dietary portfolio study with the option for continuation (re-consenting) at the end of 6, 12 or 24 months. The active dietary components consist of viscous fibers (including oat bran), soy products (including soy milk), almonds and plant sterols (sterol-enriched margarine). Lipids, blood pressure, body weight, and routine biochemical and hematology analyses will be performed over the 5 year period, with lipids and blood pressure measured at 2 monthly intervals. 40-50 subjects on the long term dietary portfolio study, all of whom will have been on the diet for at least 1 year, will be asked to remove a specific food component from their regular dietary portfolio for a 10 week period. After the 10 week period, subjects will be asked return to the normal dietary portfolio with all food components consumed and continue on the long-term dietary portfolio.
Bloods will be taken at weeks 0, 6 and 10 of the food component removal period; and at 2-monthly intervals for 20 weeks prior to and after the 10 week period while on the long-term dietary portfolio with all food components.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 21 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Healthy adult men and postmenopausal women currently enrolled in the long-term portfolio study
- •Body mass index <32 kg/m2
- •Constant body weight over last 6 months preceding the onset of the study
- •Fasting LDL-cholesterol concentration >4.1 mmol/L at diagnosis
排除标准
- •women of child-bearing potential
- •major cardiovascular event (stroke or myocardial infarction)
- •positive molecular diagnosis of familial hypercholesterolemia
- •secondary causes of hypercholesterolemia (hypothyroidism, unless treated & on a stable dose of L-thyroxine, renal or liver disease)
- •use of cholesterol-lowering medications
- •serum triglycerides >4.5 mmol/L
- •blood pressure > 145/90 mmHg
- •diabetes and/or major disorders such as liver disease, renal failure or cancer
- •major surgery <6 months prior to randomization
- •alcohol consumption >2 drinks per day
研究组 & 干预措施
A portfolio of cholesterol-lowering foods
Dietary advice to consume a dietary portfolio of cholesterol-lowering foods
干预措施: Dietary portfolio of cholesterol-lowering foods (Dietary Supplement)
结局指标
主要结局
LDL cholesterol
时间窗: At weeks 0, 2,4, 8,12, 18, 24, 34, 44, 52; then every 2 months to a total of 5 years
C-reactive protein
时间窗: At weeks 0, 12, 24, 34, 52; then every 6 months to a total of 5 years
Total cholesterol
时间窗: At weeks 0, 2,4, 8,12, 18, 24, 34, 44, 52; then every 2 months to a total of 5 years
Blood pressure
时间窗: At weeks 0, 2,4, 8,12, 18, 24, 34, 44, 52; then every 2 months to a total of 5 years
次要结局
- Routine Biochemistry and hematology measurements(At week 0, 12, 24 and every 6 months to 5 years)
- Body Weight(At weeks 0, 2,4, 8,12, 18, 24, 34, 44, 52; then every 2 months to a total of 5 years)
- Compliance to dietary portfolio components(At years, 1, 2, 3, 4 and 5)
- Apolipoprotein A1 and B(At weeks 0, 2,4, 8,12, 18, 24, 34, 44, 52; then every 2 months to a total of 5 years)
- Lp(a)(At weeks 0, 24, 52; then every 6 months to a total of 5 years)
- 24 hour urinary markers and electrolytes (optional)(At week 0 and end of years 1, 2, 3, 4 and 5)
- Oxidative stress markers(week 0 and every 6 months to 5 years)
研究者
David Jenkins
Principle Investigator
University of Toronto