Pioglitazone and Serum Asymmetric Dimethylarginine (ADMA) in Patients With Diabetes
2018年8月1日 更新者：Medical University of South Carolina
SPECIFIC AIMS
- To determine whether pioglitazone will reduce levels of asymmetric dimethylarginine(ADMA) in patients with diabetes.
- To determine whether nitric oxide(NOx) products are increased with pioglitazone treatment.
- To determine whether pioglitazone reduces oxidative stress (F2-isoprostanes).
研究概览
详细说明
The primary purpose of this study is to determine whether treatment with pioglitazone can reduce serum levels of asymmetric dimethylarginine (ADMA) in patients with adult diabetes.
Recent research has found that elevated serum ADMA is associated with increased cardiovascular events and mortality, particularly in people with diabetes (Boger 2005, Zoccali 2006, Ueda 2007).
ADMA, by mediating nitric oxide (NO) availability, may trigger pro-atherogenic effects.
High plasma concentration of this substance has been associated with intima-media thickening, left ventricular hypertrophy and all-cause and cardiovascular mortality in patients with end-stage renal disease, and associated with increased cardiovascular events in patients with diabetes (Kryzazanowska 2007).
The result of higher levels of ADMA and reduced output of NO increases vasoconstriction, increases inflammation, and interferes with endothelial function.
Preliminary studies indicate that pioglitazone may reduce ADMA levels, and thus lower cardiovascular risk.Thus, this protocol will test whether pioglitazone can reduce ADMA levels in adult patients with diabetes.
研究类型
介入性
注册 (实际的)
36
阶段
- 第四阶段
联系人和位置
本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。
学习地点
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South Carolina
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Charleston、South Carolina、美国、29425
- Department of Family Medicine, MUSC
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参与标准
研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。
资格标准
适合学习的年龄
40年 至 75年 (成人、年长者)
接受健康志愿者
不
有资格学习的性别
全部
描述
Inclusion Criteria:
- Adults age 40--75 years-of-age, non-pregnant
- Informed consent
- History of type 2 Diabetes Mellitus
- Stable weight for the last 3 months (no change greater than +5% of body weight)
- ADMA > 0.50 µM/L (mean of non-diabetic reference group) (Devangelio 2007)
- On stable medical therapy for at least 3 months
- A working telephone
Exclusion Criteria:
- Any history of known coronary heart disease, including a history of congestive heart failure, myocardial infarction, coronary re-vascularization, or stroke
- Pregnancy
- Chronic kidney disease, serum creatinine >2.0mg/dl, chronic liver disease, or uncontrolled hypertension (>160/100).
- Current participation in a formal weight loss program or planning to start such a program during the next 3 months
- Collagen vascular disease, infection, or other inflammatory condition
- Electrocardiogram (EKG) evidence of ischemia or infarction
- Macular edema (swelling of the back of the eye), recent excessive weight gain (over 5% of weight in 30 days), elevated liver function tests > 2.5 X the upper limit, or history of osteoporosis
学习计划
本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。
研究是如何设计的？
设计细节
- 主要用途：预防
- 分配：随机化
- 介入模型：交叉作业
- 屏蔽：四人间
武器和干预
参与者组/臂 |
干预/治疗 |
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实验性的：Pioglitazone then Placebo
18 volunteers that are Diabetic adults, 40-75 years that have higher ADMA levels as well as increased inflammation will take Pioglitazone for the first 12 week period of the study and then take the placebo for the final 12 weeks of the study.
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Subjects will take the pioglitazone 30mg tablet daily for 3 months.
This will be followed by a 4-week period during which subjects will not be taking either the study drug or placebo.
During the final 12-week period the group will take a placebo.
其他名称：
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实验性的：Placebo then Pioglitazone
18 (other half of participants) volunteers that are Diabetic adults, 40-75 years that have higher ADMA levels as well as increased inflammation will take the placebo for the first 12 week period of the study and then take the Pioglitazone for the final 12 weeks of the study.
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Subjects will take the placebo for the first 12 weeks of the study.
This will be followed by a 4-week period during which subjects will not be taking either the study drug or placebo.
During the final 12-week period the group will take the pioglitazone 30mg tablet daily for 3 months.
其他名称：
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研究衡量的是什么？
主要结果指标
结果测量 |
措施说明 |
大体时间 |
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Asymmetric Dimethylarginine (ADMA) Level
大体时间：3 months
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Labs measured micro moles per liter of ADMA levels in participants.
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3 months
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次要结果测量
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
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NOx f2-isoprostanes
大体时间：3 months
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Measured oxidative stress - NOx measured by chemiluminescence detection using the Sievers NOA 280i and f2-isoprostanes are isolated by thin layer chromatography and subjected to a highly sensitive and specific gas chromatography/mass spectroscopy method to measusre the oxidative stress
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3 months
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合作者和调查者
在这里您可以找到参与这项研究的人员和组织。
调查人员
- 首席研究员：Dana E King, MD、Medical University of South Carolina
研究记录日期
这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。
研究主要日期
学习开始
2008年10月1日
初级完成 (实际的)
2009年12月1日
研究完成 (实际的)
2010年6月1日
研究注册日期
首次提交
2008年10月9日
首先提交符合 QC 标准的
2008年10月9日
首次发布 (估计)
2008年10月10日
研究记录更新
最后更新发布 (实际的)
2018年8月31日
上次提交的符合 QC 标准的更新
2018年8月1日
最后验证
2011年12月1日
更多信息
此信息直接从 clinicaltrials.gov 网站检索，没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求，请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改，我们的网站上也会自动更新.