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Mineralocorticoid Receptor and Obesity Induced Cardiovascular Complications

2017年3月20日 更新者：Rajesh K. Garg、Brigham and Women's Hospital
The purpose of this study is to find out if spironolactone, a drug that blocks the action of aldosterone, can make the blood vessels work better in people with obesity. The investigators also want to find out whether spironolactone causes changes in levels of insulin and markers of inflammation.

研究概览

地位

完全的

条件

干预/治疗

研究类型

介入性

注册 (实际的)

38

阶段

  • 不适用

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

  • 美国
    • Massachusetts
      • Boston、Massachusetts、美国、02115
        • Brigham and Women's Hospital

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

18年 至 70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:

  1. Age 18-70 years
  2. Good health as evidenced by history and physical exam
  3. Body Mass Index (BMI): >30 kg/m2 and <45 kg/m2

Exclusion criteria:

  1. Medical illnesses other than treated hypothyroidism
  2. Blood Pressure (BP) >135/85 or systolic BP <90 mm Hg
  3. Hepatic disease (transaminase > 3 times normal)
  4. Renal impairment (Creatinine clearance <60 ml/min)
  5. Baseline serum Potassium (K) >5.0 mmol/L
  6. History of drug or alcohol abuse
  7. Allergies to spironolactone
  8. Participation in any other concurrent clinical trial
  9. Women using oral contraceptives within the last 3 months

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：并行分配
  • 屏蔽：三倍

武器和干预

参与者组/臂
干预/治疗
安慰剂比较：安慰剂
药品：Placebo
Placebo-matching spironolactone once daily for 6 weeks.
有源比较器：螺内酯
药品：Spironolactone
50 mg once daily for 6 weeks.

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
Change From Baseline in Post-ischemic Dilatation
大体时间：Baseline and Week 6
Ultrasonography of the brachial artery was performed to evaluate endothelial function by flow mediated dilatation (FMD) studies. A blood pressure cuff was placed on the participant's upper arm and was compressed for 5 minutes. After release of compression, brachial artery diameter and blood flow velocity were measured. FMD was expressed as the percentage change in brachial artery diameter. A positive change from Baseline indicates improvement.
Baseline and Week 6

次要结果测量

结果测量
措施说明
大体时间
Change From Baseline in Para-aminohippurate (PAH) Clearance
大体时间：Baseline and Week 6 (Prior to PAH infusion and at 50 and 60 minutes post PAH infusion)
Renal plasma blood flow was determined by clearance of para-aminohippurate (PAH). A loading dose of PAH (8 mg/kg) was given intravenously followed by a 1 hour constant infusion of PAH at a rate of 12 mg/minute (min). Plasma samples were obtained at Baseline and at 50 and 60 minutes. PAH clearance was calculated from the plasma levels and infusion rates and reported in millimeters (mL)/minute (min). A positive change from Baseline indicates improvement.
Baseline and Week 6 (Prior to PAH infusion and at 50 and 60 minutes post PAH infusion)
Change From Baseline in Markers of Inflammation
大体时间：Baseline and Week 6
Blood was to be collected and tested for Tumor Necrosis Factor Alpha (TNF-α) and Monocyte Chemotactic Protein-1 (MCP-1), markers of inflammation; However, due to lack of funding, blood samples were not analyzed and data for levels of inflammation markers were not collected.
Baseline and Week 6
Change From Baseline in Insulin Sensitivity Index (ISI)
大体时间：Baseline and Week 6 (Prior to ingesting glucose and every 30 minutes for 120 minutes)
Insulin sensitivity was measured using the 75 gram (G) glucose tolerance test. Participants ingested 75 grams of glucose in 300-400 milliliters (mL) of water over 5 minutes. Blood samples were taken before ingesting glucose and then every 30 minutes for 120 minutes. Insulin sensitivity index was calculated by Matsuda and Defronzo's formula using the values obtained. A positive change from Baseline (increase in insulin sensitivity) indicates improvement.
Baseline and Week 6 (Prior to ingesting glucose and every 30 minutes for 120 minutes)
Change From Baseline in Homeostatic Model Assessment of Insulin Resistance (HOMA-IR)
大体时间：Baseline and Week 6 (Prior to ingesting glucose and every 30 minutes for 120 minutes)
Insulin resistance was measured using the 75 G glucose tolerance test. Participants ingested 75 grams of glucose in 300-400 mL of water over 5 minutes. Blood samples were taken before ingesting glucose and then every 30 minutes for 120 minutes. HOMA-IR was calculated using the Insulin and glucose levels obtained. A negative change (decrease in insulin resistance) indicates improvement.
Baseline and Week 6 (Prior to ingesting glucose and every 30 minutes for 120 minutes)

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。

赞助

Brigham and Women's Hospital

出版物和有用的链接

负责输入研究信息的人员自愿提供这些出版物。这些可能与研究有关。

一般刊物

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

2009年2月1日

初级完成 (实际的)

2013年8月1日

研究完成 (实际的)

2013年12月1日

研究注册日期

首次提交

2011年7月26日

首先提交符合 QC 标准的

2011年7月28日

首次发布 (估计)

2011年7月29日

研究记录更新

最后更新发布 (实际的)

2017年4月28日

上次提交的符合 QC 标准的更新

2017年3月20日

最后验证

2017年3月1日

更多信息

与本研究相关的术语

关键字

其他相关的 MeSH 术语

其他研究编号

  • 2009P-000311

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.

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