The Vegetable Dose Response Study: Effects of Consumption on Inflammation and Oxidative Stress
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 75
- 试验地点
- 1
- 主要终点
- Urine Isoprostanes 8-epi-PGF2alpha
研究概览
简要总结
The investigators have designed a three dose level, cross-over vegetable feeding study using expertise from nutritional sciences and plant sciences to:
- Implement a randomized vegetable feeding trial among overweight post- menopausal women
- Produce, in a controlled environmental setting, vegetable crops which provide a selected variety and quantity of carotenoid and nutrient exposure
- Assess changes and hopefully demonstrate a significant reduction in oxidant stress and inflammation in this population at risk for developing chronic disease
详细描述
Women were randomly assigned a vegetable feeding dose order of consuming 2,5 & 10 servings/day of vegetables for 3 week periods, with feeding periods separated by 4 week washout periods, during which time a limited number of low biological value fruits and vegetables were eaten.
This research will provide important and relevant information to fill several gaps in our current knowledge including a more thorough description of the oxidant stress and inflammatory status of overweight, postmenopausal women, assessment of the relevant daily "dose" of vegetables necessary to modulate biomarkers of oxidant stress and inflammation in overweight postmenopausal women and evaluation of the association between plasma nutrient and carotenoid levels in relation to changes in oxidant stress and inflammation in this population. Our long-term goal is to reduce chronic disease risk among "at-risk" post-menopausal females.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Crossover
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 50 Years 至 75 Years（Adult, Older Adult）
- 性别
- Female
- 接受健康志愿者
- 是
入选标准
- •Age 50 to 75 years of age;
- •Target to include 20% minority subjects.
- •Post-menopausal - defined as greater than 12 months without menses; or lab values indicative of post-menopausal status;
- •Waist to hip ratio of > 0.85;
- •Body mass index (BMI) between 25.0 and 45 kg/m2 ;
- •Non-smoker;
- •Reported alcohol intake of < 2 servings daily;
- •Reported stable body weight for previous 6 months;
- •In general good health with no history of cancer (other than non- melanoma skin cancer), diabetes, liver or renal disease;
- •No known allergies to or intolerances of leaf lettuce, tomato, carrots or peppers;
- •Willing and able to successfully complete run-in activities -
排除标准
- •Morbid obesity (BMI > 45 kg/m2);
- •Medical diagnosis requiring a therapeutic diet (i.e, diabetes, hepatic disease, etc);
- •Smoking history within previous 6 months;
- •Consuming > 5 servings of fruits/vegetables daily prior to study enrollment;
- •Regular use of anti-inflammatory medications;
- •Unwilling to discontinue dietary supplements with the exception of study provided multivitamin and/or calcium supplement;
- •Unwilling to adhere to study protocol including limiting fruit intake to 1 serving per day and excluding vegetable intake other than study provided and allowed vegetables.
- •Participating in greater than 10 hours of regularly scheduled physical activity weekly or participating in vigorous physical activity on a regular basis (i.e. daily running, contact sports, etc) as assessed using a validated physical activity assessment questionnaire.
结局指标
主要结局
Urine Isoprostanes 8-epi-PGF2alpha
时间窗: Change between baseline and 3 weeks
Change in Urine Isoprostanes 8-epi-PGF2alpha
Serum high sensitivity c-reactive protein
时间窗: Change between baseline and 3 weeks
Change in serum high sensitivity c-reactive protein
次要结局
- Physical activity - Arizona Activity Frequency Questionnaire(Change between baseline and 21 weeks)
- Waist/hip circumference(Change between baseline and 3 weeks)
- Body weight(Change between baseline and 3 weeks)
- Blood pressure(Change between baseline and 21 weeks)
- Plasma carotenoids(Change between baseline and 3 weeks)
- Percent body fat(Change between baseline and 3 weeks)
研究者
Julie West
Study coordinator
University of Arizona