The Effect of Oral Carnitine Supplementation on MRS-derived Mitochondrial Function
2015年6月15日 更新者:Duke University
This is a longitudinal study supported by Pfizer and is a collaboration between DMPI (Duke Molecular Physiology Institute) and DIAL (Duke Image Acquisition Laboratory) to measure the effects of acute exercise on carnitine and acylcarnitine levels in the muscle and on insulin sensitivity in the plasma.
This pilot study seeks to explain why moderate intensity exercise provides more improvements in glucose control for pre-diabetic patients than vigorous intensity.
The investigators hypothesize that moderate intensity exercise might be beneficial for elderly individuals who are overweight or obese, specifically by: 1. Reducing damaging excess protein acetylation (measured in muscle biopsy), 2. Improving the acylcarnitine/carnitine ratio (measured by MRS), 3. Improving overall mitochondrial function as reflected in reduced phosphocreatine recovery time (measured by MRS) and 4. Increasing insulin sensitivity as measured by a 4-hour oral glucose tolerance test.
Investigators intend to use the results of this study to show feasibility in measuring mitochondrial function at Duke for a larger federal grant submission.
Investigators hypothesize that carnitine insufficiency might contribute to mitochondrial dysfunction and obesity-related impairments in glucose tolerance and insulin action.
研究概览
研究类型
介入性
注册 (实际的)
14
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
-
-
North Carolina
-
Durham、North Carolina、美国、27710
- Duke Center for Living
-
-
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
60年 至 80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:
- Age: 60-80 years
- Moderately Overweight: BMI - 25.0 - 35.4
- Sedentary - exercise ≤ 1 day/week
- Fasting plasma glucose: > 100 - < 126 mg/dL
- Readings from two separate days
Exclusion Criteria:
- Orthopedic limitations, musculoskeletal disease and/or injury
- Allergic to xylocaine
- Inability to give blood continuously through an intravenous catheter
- Have a confounding medical condition that is progressive and unstable such as HIV, Hepatitis C, active cancer, and/or taking medications for those conditions that are likely to confound the assessment of pre-diabetes
- Prior surgical operation within the past 6 months
- Prior injury to the eye involving metallic objects or fragments
- Prior injury involving a metallic object or foreign body (eg. BB, bullet, shrapnel, etc.)
- Tattoos from the waist down to the feet
Any of the following implants or devices
- Aneurysm clip
- Cardiac pacemaker
- Implanted cardioverter defibrillator (ICD)
- Electronic implant or device
- Magnetically activated implant or device
- Neurostimulation system
- Spinal cord stimulator
- Internal electrodes or wires
- Bone growth/bone fusion stimulator
- Cochlear, otologic or other ear implant
- Insulin or other infusion pump
- Implanted drug infusion device
- Eye implants
- Vascular access port and/or catheter
- Wire mesh implant or stent
- Other implant
- Claustrophobia
- Prior knee replacement surgery
- Pregnant or intending to become pregnant during the study
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:不适用
- 介入模型:单组作业
- 屏蔽:无(打开标签)
武器和干预
参与者组/臂 |
干预/治疗 |
|---|---|
|
实验性的:Acute Exercise
Repeated isometric leg exercises at varying intensities and a second visit with aerobic bike exercise for 30 minutes at 50% peak VO2.
|
Repeated isometric leg exercises at varying intensities for up to twelve minutes per bout.
Leg exercises will target the quadriceps muscles.
Aerobic exercise session on a bike at 50% of peak VO2 for 30 minutes.
|
研究衡量的是什么?
主要结果指标
结果测量 |
大体时间 |
|---|---|
|
Change in Acylcarnitine/Carnitine ratio
大体时间:Baseline, One Month
|
Baseline, One Month
|
次要结果测量
结果测量 |
大体时间 |
|---|---|
|
Change in Protein acetylation
大体时间:Baseline, One Month
|
Baseline, One Month
|
|
Change in Insulin Sensitivity
大体时间:Baseline, One Month
|
Baseline, One Month
|
|
Change in Mitochondrial Function
大体时间:Baseline, One Month
|
Baseline, One Month
|
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。
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
2014年6月1日
初级完成 (实际的)
2014年12月1日
研究完成 (实际的)
2014年12月1日
研究注册日期
首次提交
2014年4月24日
首先提交符合 QC 标准的
2014年4月24日
首次发布 (估计)
2014年4月28日
研究记录更新
最后更新发布 (估计)
2015年6月17日
上次提交的符合 QC 标准的更新
2015年6月15日
最后验证
2015年6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.