A Single-Center, Randomized, Double-Blind, Placebo-Controlled Clinical Trial of Combined Rosiglitazone/Metformin (Avandamet®) vs. Placebo on Serological Outcomes in Non-Diabetic Patients With Stable Coronary Syndromes
试验速览
- 阶段
- 4 期
- 状态
- 终止
- 入组人数
- 200
- 试验地点
- 1
- 主要终点
- To demonstrate the effect (change from baseline) of each study intervention on hs-C-reactive protein.
研究概览
简要总结
Nearly half of all Americans will die from cardiovascular disease caused by the build up of atherosclerotic plaque within coronary arteries. Most deaths in these patients arise from the development of acute coronary syndromes (ACS) such as myocardial infarction, unstable angina, or sudden death. ACS is characterized by coronary plaque erosion or rupture, which is triggered by endothelial changes, including inflammation, and thrombosis. Diabetes, with insulin resistance as a major component, has been shown to engender adverse metabolic events within the endothelial cell [1], including impaired endothelial function, augmented vasoconstriction, increased inflammation and thrombosis. Activation of the transcription factors nuclear factor KB (NF-KB) and activator protein 1 (AP-1) induces inflammatory gene expression, with liberation of leukocyte-attracting chemokines, increased production of inflammatory cytokines, and augmented expression of cellular adhesion molecules. These metabolic processes may therefore play a significant role in the development of ACS.The hypothesis is that rosiglitazone and metformin, or the combination of both may provide positive anti-atherogenic effect, even among patients without diabetes. This pilot study proposes to evaluate the effect of placebo vs. combined rosiglitazone/metformin (Avandamet®) on surrogate blood markers of atherosclerosis activity among non-diabetic and pre-diabetic patients with known stable coronary syndromes. This will provide further evidence justifying a large definitive outcomes-based clinical trial.
详细描述
This is a single-center, randomized, double-blind trial comparing combined rosiglitazone/metformin (Avandametä) to placebo in subjects with normal or intermediate fasting glucose (IFG) and stable coronary artery disease.Subjects meeting entry criteria will be randomized in a 1:1 ratio to receive either placebo or combined rosiglitazone/metformin (Avandametä) 4/1000 mg. Laboratory specimens including high sensitivity C-reactive protein (hs-CRP), glucose, HgbA1C, complete lipid profile, will be obtained after a 10 hour fast as specified by study visits. Subjects will return for repeat study visits at 2, 4, 6 and 8 months for repeat laboratory evaluations, including safety labs consisting of serum creatinine, liver enzymes, and a CBC. Additionally, subjects will have IL-6 and TNF-a measured for research purposes at baseline and subsequent follow-up visits. All subjects will be followed for a minimum of 8 months. This pilot study proposes to evaluate the effect of placebo, or combined rosiglitazone/metformin onsurrogate blood markers of atherosclerosis activity among non-diabetic and pre-diabetic patients with known stable coronary syndromes.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Treatment
- 盲法
- Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •The patient (male or non-pregnant female) must be > 18 years of age.
- •The patient or legally authorized representative must sign a written informed consent, prior to the procedure, using a form that is approved by the local Institutional Review Board.
- •Angiographically documented coronary artery disease defined as the presence of at least one 50% or greater stenosis of a major coronary artery.
- •Stabilized post any prior ACS event (i.e., without ongoing ischemic rest pain, congestive heart failure, or malignant arrhythmias) for at least 3 months
- •Fasting blood glucose 87-125 mg/dL
排除标准
- •Age <18 years
- •Known hypersensitivity to metformin or rosiglitazone
- •Renal insufficiency defined as calculated creatinine clearance (CrCl) <40 mL/min using the following formula:
- •Men: CrCL (mL/min) = Weight (kg) x (140-age) 72 x serum creatinine (mg/dL) Women: 0.85 x the value calculated for men
- •Pregnant and/or lactating women, and women of child bearing potential are excluded from this trial
- •Co-morbidity such that the patient is not expected to survive >2 years
- •Current therapy with rosiglitazone or metformin
- •PCI within the previous six months (other than for the qualifying event)
- •Prior CABG within the previous two months, scheduled CABG, or a decision to perform CABG made prior to enrollment
- •Overt diabetes mellitus (FBG>126 or antidiabetic therapy)
- •Any diagnosis of congestive heart failure
- •Obstructive hepatobiliary disease or other significant hepatic disease (defined as the presence of at least one of the following: AST, ALT, GGT, total bilirubin, or alkaline phosphatase >3x upper limit normal, not related to MI
- •Participation in any other clinical trials involving investigational or marketed products within 30 days prior to entry in the study.
研究组 & 干预措施
Avandamet
AVANDAMET 2/500 mg
干预措施: AVANDAMET (Drug)
Placebo
干预措施: AVANDAMET (Drug)
结局指标
主要结局
To demonstrate the effect (change from baseline) of each study intervention on hs-C-reactive protein.
时间窗: Study completion
To demonstrate the safety of the interventions on clinical outcomes (death, MI, cardiovascular hospitalizations) and serious drug-related adverse events.
时间窗: Study completion
次要结局
- To demonstrate the effect (change from baseline) of each study intervention on lipid levels(Study completion)
- To demonstrate the effect (change from baseline) of each study intervention on inflammatory marker levels other than hs-CRP(Study completion)
- To demonstrate the effect (change from baseline) of each study intervention on HgbA1C(Study completion)
- To demonstrate the effect (change from baseline) of each study intervention on fasting blood glucose(Study completion)
- Safety: Differences in adverse events between the two arms(Interim; completion of study)