此页面是自动翻译的，不保证翻译的准确性。请参阅 英文版 对于源文本。

Effect of Ketoconazole on Breathlessness (KetoRLB)

2018年5月4日 更新者：Dartmouth-Hitchcock Medical Center

The Effect of Ketoconazole on Breathlessness During Resistive Load Breathing in Patients With Chronic Obstructive Pulmonary Disease

Beta-endorphins, which are naturally occurring narcotic substances, have been shown to alter the perception of breathlessness. Oral ketoconazole, an antifungal antibiotic, increases blood levels of beta-endorphins. The study hypothesis is that oral ketoconazole will reduce ratings of breathlessness induced by resistive breathing loads.

研究概览

地位

完全的

条件

干预/治疗

详细说明

Beta-endorphins are naturally occurring narcotic substances (like morphine) that are released by the brain under stressful conditions, such as exercise and when breathing through a resistive load (a tube containing fine wire mesh). In one study of 8 patients with coronary artery disease, ketoconazole, an oral medication used to treat fungal infections, was administered (1,200 mg at 12 midnight and 600 mg at 6 am) and increased blood levels of beta-endorphins five fold. In a recent study performed at Dartmouth-Hitchcock Medical Center, we found that ketoconazole increased blood levels of beta-endorphins in all eight patients with chronic obstructive pulmonary disease (COPD). Mean values increased by 2.5 times at four hours compared with baseline values (p = 0.0078). Based on this significant response, we propose to study the effect of ketoconazole on patients' perception of breathlessness induced by resistive breathing loads in a randomized clinical trial. The hypothesis of the study is that ketoconazole will reduce ratings of breathlessness as mediated by the increased levels of beta-endorphins.

研究类型

介入性

注册 (实际的)

20

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

  • 美国
    • New Hampshire
      • Lebanon、New Hampshire、美国、03756-0001
        • Dartmouth-Hitchcock Medical Center

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

50年 及以上 (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:

  • 50 years of age or older;
  • diagnosis of COPD;
  • current or former smoker of at least 10 pack-years;
  • post-bronchodilator FEV1 greater than or equal to 30% predicted and less than or equal to 80% predicted; post-bronchodilator ratio < 70%

Exclusion Criteria:

  • any concomitant disease that might interfere with study procedures;
  • use of a drug that may cause a possible drug interaction with ketoconazole

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：治疗
  • 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
实验性的：ketoconazole
600 mg ketoconazole
药品：ketoconazole
600 mg capsule oral once
其他名称：
  • oral antifungal
安慰剂比较：inert powder
inert powder in capsule
药品：inert powder
oral once
其他名称：
  • 口服安慰剂

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
Unpleasantness of Breathlessness
大体时间：At 1 minute intervals during Resistive Load Breathing at Period 1 (Day 3 or 4) and Period 2 (Day 5, 6 or 7)

The average of all ratings for the unpleasantness of breathlessness at equivalent times for each subject during Resistive Load Breathing (RLB). For example, if 1 subject provided 6 ratings during 6 minutes of RLB with Ketoconazole and 10 ratings during 10 minutes of RLB with inert powder, then ratings for unpleasantness through 6 minutes were used for analysis for that patient. This approach was used for all subjects to yield a total of 252 ratings for Ketoconazole and for inert powder.

Subject rating of intensity of unpleasantness was obtained during RLB on a 100 mm Visual Analog Scale anchored at the bottom by "No Unpleasantness" and at the top by "Greatest Unpleasantness".
At 1 minute intervals during Resistive Load Breathing at Period 1 (Day 3 or 4) and Period 2 (Day 5, 6 or 7)
Intensity of Breathlessness
大体时间：At 1 minute intervals during Resistive Load Breathing at Period 1 (Day 3 or 4) and Period 2 (Day 5, 6 or 7)

The average of all ratings for the intensity of breathlessness at equivalent times for each subject during Resistive Load Breathing (RLB). For example, if 1 subject provided 6 ratings during 6 minutes of RLB with Ketoconazole and 10 ratings during 10 minutes of RLB with inert powder, then ratings for intensity through 6 minutes were used for analysis for that patient. This approach was used for all subjects to yield a total of 252 ratings for Ketoconazole and for inert powder.

Subject rating of intensity of breathlessness was obtained at 1 minute intervals during RLB on a 100 mm Visual Analog Scale anchored at the bottom by "No Intensity" and at the top by "Greatest Intensity".
At 1 minute intervals during Resistive Load Breathing at Period 1 (Day 3 or 4) and Period 2 (Day 5, 6 or 7)

次要结果测量

结果测量
措施说明
大体时间
Change in Level of B-endorphin Immunoreactivity
大体时间：At the end of resistance load breathing (4.5 hours after receiving the test article)
Change between pre-treatment and post treatment serum levels of beta-endorphin immunoreactivity measured in pmol/L
At the end of resistance load breathing (4.5 hours after receiving the test article)

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

Dartmouth-Hitchcock Medical Center

调查人员

  • 首席研究员：Donald A Mahler, MD、Dartmouth-Hitchcock Medical Center

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

2011年6月1日

初级完成 (实际的)

2012年2月1日

研究完成 (实际的)

2012年2月1日

研究注册日期

首次提交

2011年6月16日

首先提交符合 QC 标准的

2011年6月21日

首次发布 (估计)

2011年6月22日

研究记录更新

最后更新发布 (实际的)

2018年6月1日

上次提交的符合 QC 标准的更新

2018年5月4日

最后验证

2018年5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

  • CPHS22775

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.

搜索类似试验

赞助者和合作者

医疗条件

药物干预

CROs by country

CROs in Colombia

条件

罕见疾病

药物干预

膳食补充剂

赞助者/合作者

地点

3
订阅