Influence of Meal Timing on Glucose Metabolism and Hyperandrogenism in Lean Women With Polycystic Ovary Syndrome
试验速览
- 阶段
- 不适用
- 入组人数
- 60
- 试验地点
- 2
- 主要终点
- hyperandrogenism
研究概览
简要总结
In obese women with polycystic ovary syndrome (PCOS), weight loss improves insulin resistance and hyperandrogenism, resulting in improvement of clinical symptoms. Weight loss is not required in lean PCOS patients; nevertheless, the influence of meal timing and composition on glucose metabolism and hyperandrogenism may have clinical value. In this study the investigators investigate the effects of two isocaloric diets with different meal timing distribution on insulin resistance and hyperandrogenism in lean PCOS patients.
详细描述
Insulin resistance and hyperinsulinemia plays a pivotal role in the pathogenesis of polycystic ovary syndrome (PCOS). Hyperinsulinemia stimulates ovarian cytochrome P450c17 alpha activity, in obese and nonobese women with PCOS, thereby increasing serum levels of 17-alpha-hydroxyprogesterone, androgens concentrations, decreasing SHBG and promoting the clinical features of hyperandrogenism.
In women with PCOS, weight loss improves insulin resistance and hyperandrogenism, resulting in improvement of clinical symptoms. Since lean women with PCOS do not have the option of weight loss, it is important to know weather diet composition and meal timing distribution may influence glucose metabolism and hyperandrogenism.
We hypothesized that a timing pattern of increased nutrient intake of protein and carbohydrates in the morning, with decreased caloric intake at night would improve insulin sensitivity and hyperandrogenism in lean women with PCOS.
Objective
The objective of this study is to investigate the effects of two isocaloric diets with different meal timing distribution on insulin resistance and hyperandrogenism in lean PCOS women.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Supportive Care
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 45 Years（Adult）
- 性别
- Female
- 接受健康志愿者
- 否
入选标准
- •Subjects ≥18 and ≤45 years of age
- •Lean women with PCOS (BMI: ≤ 25 kg/m2)
- •Signed informed consent
- •Exclusion of late-onset adrenal hyperplasia by a fasting serum 17- hydroxy progesterone concentration below 200 ng/dl.
- •Acceptable health based on interview, medical history, physical examination, and laboratory tests (SMA20 and CBC).
- •Not dieting and no change in body weight >10 lb = 4.5 kg within the last 6 months
- •Stable physical activity pattern during the three months immediately preceding study initiation
- •Hyperandrogenemia (elevated free testosterone).
- •Normal liver and kidney function
- •Fasting blood glucose <110 mg/dl.
- •No metabolic disease
- •Usually wakes up between 05:00 and 07:00 and goes to sleep between 22:00 and 24:
- •Normal TSH and FT4 levels and serum prolactin
- •Acceptable health based on interview, medical history, physical examination, and laboratory tests
排除标准
- •Diabetes mellitus diagnosed by fasting glucose or a 2-hour OGTT, or fasting glucose > 110 mg/dl
- •Clinically significant pulmonary, cardiac, renal, hepatic, neurologic, psychiatric, infectious, malignant disease (other than skin cancer).
- •Current use of oral contraceptives
- •Serum creatinine level > 1.5 mg/dl
- •Abnormal liver function tests defined as an increase by a factor of at least 2 above the upper normal limit of alanine aminotransferase and/or aspartate
- •Any physiologic or mechanical problems preventing dietary adherence
- •Pregnant or lactating
- •Participating in another dietary program or use of weight-loss medications
- •Documented or suspected history (within one year) of illicit drug abuse or alcoholism.
- •Use of psychotropic or anoretic medication during the month immediately prior to study onset
- •Night or rotating shift work
- •Jet lag during the 2 week period immediately prior to study onset
结局指标
主要结局
hyperandrogenism
时间窗: 90 days
Androgens will be evaluate at baseline and after one of two isocaloric diet that differe in meal timing distribution
次要结局
- glucose metabolism(90 days)
研究者
Daniela Jakubowicz
Prof. Daniela Jakubowicz MD
Tel Aviv University