17 Clinical Trials for Various Conditions
The purpose of this study is to test how different doses of a statin, Lipitor, affect muscle health and function, and cardiovascular fitness.
The primary goal of proposed investigation is to study the impact of oral glutamine supplementation on muscle mitochondrial and endothelial cell function measured mitochondrial energetics and vascular function using 31P magnetic resonance spectroscopy and optical spectroscopy (MRS/OS) among persons with moderate-severe CKD. The secondary objective is to describe the impact of oral glutamine supplementation on mitochondrial metabolic profile as well as inflammatory and oxidative stress biomarkers among persons with chronic kidney disease.
Mitochondrial dysfunction in skeletal muscle results in decreased muscle fatty acid oxidation, leading to conversion of fatty acids into triglycerides and its accumulation inside the muscle tissue. Moreover, in adipose tissue mitochondrial dysfunction results in decreased fatty acid oxidation and triglyceride synthesis, leading to increased circulating fatty acid concentrations, which in turn also leads to lipid accumulation inside muscle tissue. Lipid accumulation inside muscle tissue interferes with the insulin signaling pathway and causes insulin resistance. Mitochondrial dysfunction in both tissues has therefore been proposed to play an important role in insulin resistance in humans. Pioglitazone, a thiazolidinedione, is an FDA approved medication for the treatment of type 2 diabetes. It improves muscle insulin sensitivity at least in part by lowering intramuscular lipid concentrations but the mechanism by which this occurs is unclear. In the present study, we shall therefore test the hypothesis that pioglitazone improves mitochondrial function in muscle and adipose tissue in humans who are insulin resistant.
This is a randomized, double-blind, placebo-controlled parallel group study of HU6 and placebo in subjects who are overweight or obese with T2D. The study will be conducted in 4 stages.
The main goal of this project is to determine whether mitochondrial function in circulating cells is related to that measured in the muscle fibers of the same subjects.
Participants recruited for this study will be breast cancer or gynecological cancer patients who agree to participate in an exercise study examining the effects of chemotherapy on muscle mitochondrial oxidative capacity, a measure of skeletal muscle health. Participants will ride a stationary bicycle and the quadriceps muscle will be non-invasively evaluated.
The proposed study is designed to test the hypothesis that treatment of resveratrol for 12 weeks will improve both endothelin-B receptor (aim 1) and skeletal muscle mitochondrial function (aim 2) in people with type 1 diabetes.
Background: Nicotinamide riboside (NR) is a vitamin B3 dietary supplement. It may help improve muscle function, that may in turn may improve a person s exercise capacity. Researchers want to study how skeletal muscle responds to NR in an individual who has Li-Fraumeni Syndrome and slow muscle energy recovery after exercise. Objective: To study how nicotinamide riboside affects skeletal muscle after exercise. Eligibility: One person at least 18 years old with Li-Fraumeni syndrome and a certain gene mutation Design: The participant will be screened with a medical history, physical exam, and blood and urine tests. The participant may also have a heart test. The participant will maintain their regular diet and supplements during the study. The participant will take the study drug as 1-4 tablets twice a day for 12 weeks. The participant may be contacted with reminders and questions about side effects. The participant will have 4-5 visits over 18-30 weeks. At visits, the participant will repeat screening tests. At some visits they will also have: * Ultrasound of the heart with a wand placed on the chest. * Test of oxygen used at rest and exercise, while wearing a face mask. * Exercise test on a treadmill or bicycle with electrodes on the skin. * Magnetic resonance spectroscopy. The participant will have no caffeine for 12 hours. Then they will lie in a machine for about 2 hours. Sometimes they will lie still. Sometimes they will be asked to move. Health questionnaire The participant may have a skin sample taken by needle. The participant will be withdrawn from the study if they become pregnant.
This is a randomized, double-blind, single-center, placebo-controlled Phase 2 trial enrolling 66 healthy elderly subjects (33 placebo and 33 AMAZ-02 administration) who are ≥65 and ≤ 90 years of age with evidence of low mitochondrial function. AMAZ-02 or placebo will be orally administered for 4 months.
The purpose of this study is to determine whether skeletal muscle mitochondrial function is altered in patients with head and neck cancer compared to healthy controls.
This was a Phase 2, randomized, double-blind, placebo-controlled study, enrolling 41 elderly subjects with previous evidence of mitochondrial dysfunction to evaluate whether the administration of MTP-131 (elamipretide) will change either hand skeletal muscle energetics or muscle performance in age-related skeletal muscle mitochondrial dysfunction.
Resveratrol, a compound found in red wine and dark-skinned grapes, will improve the function of mitochondria (energy producing components) within the leg muscles of moderate functioning older adults. The investigators will look at the role Resveratrol plays in improving physical function by studying the connection of changes in mitochondrial function and changes in physical function.
The purpose of this study is to collect data to help researchers identify factors that prevent certain individuals from receiving the beneficial effects of exercise.
The major goal of this study is to characterize the ability of dark chocolate enriched in epicatechin (a component of dark chocolate) to improve the structural and functional features of mitochondria in two groups 1. Patients with heart failure (HF) and type 2 diabetes (DM2) and 2. Normal yet sedentary individuals with impaired baseline exercise capacity (as assessed by VO2 max) We propose that a 3 month treatment with dark chocolate will lead to a significant improvement in exercise capacity which will be secondary to the improvement in skeletal muscle structure from epicatechin.
Background: People are living longer and are more likely to survive a heart attack if they have one. Longer life expectancy is good but it also means more people get chronic heart failure over time. This is a condition in which the heart doesn't pump blood as well as it should. Treatment of chronic heart failure has not improved much in a few decades. Researchers want to see if giving a dietary supplement to people with heart failure can help their heart function. The supplement is nicotinamide riboside (NR). Objective: To study how NR affects skeletal muscle function in people with heart failure. Eligibility: Adults ages 18-70 with clinically stable systolic heart failure Design: Participants will be screened with a medical history and physical exam. They will answer demographic questions and review their current medical treatments. They will have blood and urine tests. They will have an echocardiogram. This uses sound waves to test heart function. Participants will have 8 study visits over 16 weeks. At these visits, they will have some of the following: Repeat of screening tests Skin sample taken Skeletal muscle exercise Nuclear magnetic resonance (NMR) spectroscopy. Muscles will be measured while participants do foot exercises. Cardiopulmonary exercise testing. Participants may ride a stationary bike or walk on a treadmill. A facemask will analyze their breath. Heart and blood pressure measurements will be taken. Participants will take the supplement in pill form each day for 12 weeks. Pill bottles will be checked at study visits. Participants should not significantly change their activity levels during the study.
Frailty is an age-associated clinical condition of poor physiological reserve that increases risks for falls, hospitalization and mortality. Nicotinamide adenine dinucleotide (NAD) is a critical co-factor needed for many cellular processes. The natural levels of NAD decline aging and this has been linked to physical performance decline in animals. Human trials have demonstrated that nicotinamide riboside (NR), a form of vitamin B3, is safe and effectively increases NAD+ levels. In animal studies, NR improves treadmill performance and muscle quality. Here the investigators propose a double-blind randomized control trial to assess the benefits of NR supplementation on human muscle function and physiology. The investigators anticipate the research findings will support the use of this nutritional supplement to improve the health of Veterans during aging.
This current proposal evaluates the Longitudinal Energy Expenditure and Metabolic Effects in Patients with COVID-19 (LEEP-COVID) to understand, guide and optimize our metabolic and nutritional care of these high risk patients. As no data exist for the metabolic effects of COVID-19 patients, this data is urgently needed and essential to assist in the care of COVID-19 patients worldwide. We are uniquely positioned at Duke to perform this research, as we are the only US center with 2 of the FDA-approved devices in existence currently capable of collecting this vital data to guide the care of COVID-19 patients worldwide.