164 Clinical Trials for Various Conditions
The Department of Veterans Affairs is the largest single provider of medical care to people with HIV in the United States. The condition of excess lipid within and around muscle, termed myosteatosis, predisposes Veterans to physical function decline, frailty, disability, and cardiometabolic diseases such as diabetes and cardiovascular disease. In the investigators current Merit supported cohort, the investigators found that 36% of Veterans with treated HIV and obesity have "myosteatotic type obesity". Based on the investigators findings, the investigators have designed a multipronged integrated intervention that combines: 1) dietary replacement of saturated with unsaturated fats; 2) administration of L-carnitine and omega-3 fatty acid supplementation; and 3) targeted resistance exercise training.
The participants are being asked to take part in this trial, because the participant is a survivor of childhood cancer or agreed to be part of a volunteer group to understand the relation between cancer and cancer treatment and muscle weakness in survivors of Acute Lymphoblastic Leukemia (ALL). ALL is cancer of the blood and bone marrow. Primary Objective • To compare muscle mtOXPHOS activity and satellite cell content among ALL survivors and controls. Secondary Objective * To evaluate the association between muscle mtOXPHOS, muscle satellite cell content and physical performance in ALL survivors. * To evaluate the association of muscle morphology and epigenetics with muscle mtOXPHOS in ALL survivors.
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.
In this observational study, researchers are looking at the effects of spinal muscular atrophy (SMA) drugs on the muscles and nerve cells in patients with SMA. Primary Objectives * To evaluate the feasibility and reliability of performing MR functional imaging in exercising muscle in patients with SMA. * To evaluate patients with SMA types 2 and 3 at baseline and longitudinally at 6 and 12 months Secondary Objectives * To describe the MR functional bioenergetics response in the leg muscles in four potential groups of patients with spinal muscular atrophy: untreated, actively treated with nusinersen (Spinraza®) or onasemnogene abeparvovec (Zolgensma®), actively treated with risdiplam (Evrysdi®), and switching from Spinraza or Zolgensma to Evrysdi. * To identify changes in motor function in patients with SMA types 2 and 3 who initiate treatment with risdiplam. * To obtain biomarkers in blood, urine, and muscle tissue to provide evidence for risdiplam effect on skeletal muscle. * To obtain quality of life and disability data from participants in this study.
This study aims to determine, via skeletal muscle ultrasound (US), the extent, timing and relationship between skeletal muscle mass loss and outcomes after orthotropic heart transplantation (OHT) and left ventricular assist device (LVAD) implantation amongst patients with cardiogenic shock. Advanced therapies such as OHT and VADs in the heart failure (HF) population may promote skeletal muscle mass and subsequent quality of life, but there is a lack of literature assessing muscle mass changes in HF patients before and after advanced therapies using US imaging. Therefore this observational study will provide further insight into the 1) changes in lean body mass during critical illness and 2) the feasibility of using bedside US to assess lean body mass in the inpatient setting.
The primary aims of this study are to determine the effect of percussive massage (30 min/session, 2 sessions/day, daily) during 10 days of unilateral limb immobilization on preserving muscle, vascular, and mitochondrial function. The following hypotheses will be tested: Hypothesis 1: Percussive massage will attenuate the loss of size, strength and endurance over the immobilization period compared to the control group, as measured by MRI, maximal isometric and isokinetic force production and muscle endurance test using Biodex dynamometry. Hypothesis 2: Percussive massage will attenuate the loss of vascular function and blood flow compared to the control group as measured by passive leg movement and femoral artery blood flow. Hypothesis 3: Percussive massage will attenuate the loss of skeletal muscle mitochondrial function and decrease H2O2 production during immobilization compared to the control group, as measured by high-resolution respirometry.
The purpose of the study is to determine associations between fitness status, bacteria in the mouth, and the blood flow to muscle. This study is trying to find out if fitness status impacts the bacteria that are present in the oral microbiome (environment in the mouth) or the ability of the body to send blood to the skeletal muscle. Participants will complete all or some of the following: * A mouth swab to assess the bacteria in their mouths. * Produce a saliva sample into a tube. * Cycle on a bike until you reach maximum effort. * Undergo blood draws * Wear a 24-hour non-invasive device that monitors blood pressure. * Undergo a test to assess blood flow to the muscles measured with an ultrasound. * Drink 70mL (1/3 of a cup) of concentrated beetroot juice once
The purpose of this study is to determine the impact of real-world shiftwork on metabolic flexibility.
The purpose of the study is to determine whether there is a synergistic effect via combining both low-load blood flow restriction (BFR) training and betaine supplementation loading (6g/day for 14 days) on skeletal muscle anabolic signaling pathways that is mediated by enhancements in intracellular water. These effects are proposed to be greater than either BFR training or betaine supplementation alone or compared to control conditions (high-load non-occluded and/or placebo supplementation).
The goal of this clinical trial is to quantify the effects of aerobic exercise training compared to attention control on intermuscular adipose tissue in colorectal cancer survivors.
This will be a randomized study to determine if animal-based protein-rich food sources can stimulate greater muscle protein turnover and whole-body protein balance and reduce skeletal muscle inflammatory markers in postmenopausal women compared to vegetarian base protein-rich foods.
Severe skeletal wasting and catabolic weight loss are highly common among patients with heart failure with reduced ejection fraction (HFrEF). This prospective randomized controlled trial will compare changes in the muscle mass in the arms and the legs (appendicular lean mass) in patients with HFrEF randomized between 3 groups of no, low- or high-dose protein supplementation. The dietary protein supplementation will be Ensure(R) products manufactured by Abbott Nutrition. The Investigators hypothesize that skeletal muscle wasting in HFrEF is promoted by neurohumoral activation of catabolic metabolism (such as GDF-15 and ActRII pathways) and can be at least partially reversed by increased dietary protein intake. It is anticipated that this study will determine whether dietary protein supplementation helps to prevent muscle wasting and will advance understanding of the GDF-15 and ActRII muscle wasting pathways.
The purpose of this pilot study is to generate preliminary data on the impact of the dietary protein pattern on markers of skeletal muscle health and drug efficacy in Parkinson disease.
The study will assess the exercise-induced changes in chromatin accessibility and gene expression in a cell type-specific manner in skeletal muscle from healthy adults in response to exercise at three different intensities - 1) low-intensity continuous exercise, 2) moderate-intensity continuous exercise, and 3) high-intensity interval exercise.
The primary objective of this pharmacokinetics study is to compare the maximum concentration level of paclitaxel in patients with low/sarcopenic skeletal muscle area (SMA), at the end of a 2-3 hour paclitaxel infusion, to the maximum level in patients with normal SMA at the end of a standard 1-hour infusion with the goal of determining whether lengthening the infusion in patients with low/sarcopenic SMA normalizes the levels to those of patients with normal SMA.
This research is being done to better understand the relationship between information collected by wearable devices and clinical measurements in people with heart failure with preserved ejection fraction (HFpEF) and others without HFpEF. This is an observational study with no study intervention or randomization. Participants will undergo baseline history and physical, 12-lead EKG, laboratory studies of blood/serum/urine, echocardiography, activity questionnaire, 6 minute walk test, and placement of wearable devices to be worn for up to 14 days (activity monitors, EKG monitor and continuous glucose monitor). Participants will return after \~14 days of wearing the devices and repeat of physical examination, 12-lead EKG, 6 minute walk test, activity questionnaire. Additionally, participants will undergo magnetic resonance imaging (MRI) of their leg with exercise, cardiopulmonary exercise testing (CPET) and, for those who qualify, magnetic resonance imaging (MRI) of their heart with exercise.
The key objective of this pilot research study is to dose human volunteers with a heavy (non-radioactive) isotope derivative of nicotinamide to detect NAD synthesis in human skeletal muscle. The ultimate goal is to examine the impact of lifestyle choices, aging, nutraceuticals, and drugs on the rate of NAD synthesis in human subjects.
The overall aim of this pilot study is to investigate the effects of exercise training on skeletal muscle and adipose tissue insulin resistance in subjects with Type 2 Diabetes (T2D).
This non-randomized pilot study aims to investigate whether a protein rich nutritional shake (Ensure Enlive) given to patients pre-transplant will decrease skeletal muscle loss (measured by quadriceps ultrasound) and improve nutritional state (measured by Nutritional Risk Index). A nutritional supplement would be a cost-effective solution to treat malnutrition, a known risk factor implicated in poor outcomes for lung transplant recipients.
Over 40 million Americans take statins to reduce their risk of atherosclerotic cardiovascular disease (ASCVD). Unfortunately, 10 to 20% stop taking them due to statin-associated muscle symptoms (e.g. pain, aches, weakness, cramps, or stiffness) (1, 2). The pathophysiology of these statin-associated muscle symptoms (SAMS) has remained elusive. Consequently, no objective diagnostic method exists, causing confusion for patient and providers since muscle symptoms can often be multifactorial.
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.
This 2-site randomized double blinded controlled trial is to confirm and more definitively clarify the impact of a 12-week course of nitrite versus placebo on mitochondrial bioenergetics in older sedentary adults. This investigator will take an integrative physiology approach to determine the effect of nitrite therapy on a comprehensive assessment of mitochondrial energetics, skeletal muscle vascular function, and whole body physical function (cardiorespiratory function, exercise endurance, strength, balance, and physical activity) and fatigability.
Prolonged periods of reduced activity are associated with decreased vascular function and muscle atrophy. Physical inactivity due to acute hospitalization is also associated with impaired recovery, hospital readmission, and increased mortality. Older adults are a particularly vulnerable population as functional (vascular and skeletal muscle mitochondrial dysfunction) and structural deficits (loss in muscle mass leading to a reduction in strength) are a consequence of the aging process. The combination of inactivity and aging poses an added health threat to these individuals by accelerating the negative impact on vascular and skeletal muscle function and dysfunction. The underlying factors leading to vascular and skeletal muscle dysfunction are unknown, but have been linked to increases in oxidative stress. Additionally, there is a lack of understanding of how vascular function is impacted by inactivity in humans and how these changes are related to skeletal muscle function. It is our goal to investigate the mechanisms that contribute to disuse muscle atrophy and vascular dysfunction in order to diminish their negative impact, and preserve vascular and skeletal muscle function across all the lifespan.
The goal of the study is to examine the ability of resistance or aerobic exercise training to "imprint" skeletal muscle cells in a manner which confers long-term changes in this tissue which in-turn contribute to improved metabolic health and functional capacity through epigenetic regulation of novel exercise response genes. This study will also provide primary human skeletal muscle cells to the Molecular Transducers of Physical Activity Consortium (MoTrPAC) (NCT03960827) repository for future use.
This is a prospective cohort study of 30 patients who are 8-21 years of age with venous thromboembolism (VTE)- either lower extremity deep venous thrombosis (DVT) or pulmonary embolism (PE).
The purpose of this research study is to find out if Type 1 Diabetes (T1D) affects skeletal muscle health and if we can improve glycemic control by improving skeletal muscle health. Participants in this study will have a blood sample and a urine sample collected after taking a single dose of a nontoxic chemical called D3-creatine. Their body composition will be measured by a scale like device. Parents of participating children will also be asked to complete a food and activity questionnaire. Participants will be in the study for roughly 12 to 24 months. Enrollment will begin once participant signs the consent form. At the 12 month follow-up visit participants will be asked to wear a Garmin physical activity monitor and use the Garmin Connect mobile app for a period of up to 12 months and take a one time Muscle Strength Measurement test. The greatest risks of this study include the possibility of loss of confidentiality.
Inadequate sleep is an independent risk factor for metabolic abnormalities (such as obesity, insulin resistance, and hyperglycemia). Women report sleep disruption during the menopause transition (perimenopause) and into the postmenopausal years. Sleep disruption is one of the primary reasons why midlife women seek medical care, with up to 60% reporting significant sleep disturbances (e.g., trouble falling asleep, early morning waking, and hot flashes/night sweats). Despite the majority of women experiencing sleep disruption, no study has investigated the molecular mechanisms linking sleep disruption and the changes in metabolism that coincide with menopause.
One of the greatest challenges faced by older adults is maintaining physical function and strength with aging. Deterioration of skeletal muscle with aging leads to loss of mobility, decreased quality of life, and ultimately loss of independence. Skeletal muscle deterioration with aging is multifactorial, with a key factor being impaired skeletal muscle regeneration following damage. Muscle regeneration is a multistep process that requires a viable population of skeletal muscle specific progenitor cells (MPCs). MPCs reside in the skeletal muscle in a dormant state until activated by stress or injury cues. Upon activation, MPCs divide, commit to the muscle cell lineage, and fuse to form new multinucleated cells or repair damaged muscle cells. In older adults this regenerative process is impaired, which amplifies skeletal muscle deterioration. The investigators demonstrated that the ability of MPCs to divide (proliferate) is reduced, while MPC death is elevated in MPCs from healthy older adults. Further, the investigators have demonstrated that impaired nutrient metabolism, cellular inflammation, and oxidative stress are key mechanisms in this age-related disruption of MPC proliferation and overall skeletal muscle health. Therapies that improve the regenerative process and nutrient metabolism as well as attenuate oxidative stress and inflammation are necessary to improve overall skeletal muscle health of older adults. Blueberries have properties that the investigators hypothesize will improve the proliferative capacity (increase cell division and reduce cell death) of MPCs. Additionally, the investigators hypothesize that consumption of blueberries will improve skeletal muscle regeneration in the aging population via improved nutrient metabolism, attenuated cellular inflammation, and reduction of oxidative stress. The hypotheses will be tested using a dietary blueberry intervention. Serum from our human subjects \[blueberry enriched diet (BED)-serum\] will be collected and used to treat primary human MPCs. Ultimately, the investigators hypothesize that a blueberry enriched diet provides an ideal, natural therapy to improve MPC proliferative capacity, which is necessary to attenuate skeletal muscle deterioration.
Persons with rheumatoid arthritis (RA) suffer from increased disability and mortality, in part resulting from skeletal muscle impairments. In this study, our objective is to determine if skeletal muscle biomechanical properties are altered in RA. Up to 15 participants with early RA defined as duration of disease/symptoms of less than 6 months (where "duration" denotes the length of time the patient has had symptoms/disease, not the length of time since RA diagnosis) AND prior to starting biologic Disease-modifying anti-rheumatic drugs (bDMARD) therapy and 15 age-, sex-, and BMI-matched controls will undergo clinical assessments of skeletal muscle stiffness and elasticity as measured by the hand-held MyotonPro device. Additional study participant assessments include cardiopulmonary exercise testing, muscle strength testing, body composition measurement using BodPod, muscle oxidative capacity testing using near-infrared spectroscopy, and thigh muscle needle biopsies to compare clinical findings to an ex vivo cultured myobundle system. Primary statistical analyses will be comparisons of skeletal muscle parameters in RA compared to controls and correlations to determine relationships between variables. Thigh muscle biopsies are a low-risk procedure that may cause minor local soreness and bleeding; all other clinical assessments are non-invasive and will induce minimal discomfort to participants.
This project is a 2-phase, randomized clinical trial that includes 7 days of unilateral leg disuse (Phase 1), immediately followed by 1 week of bilateral leg rehabilitation (Phase 2). The investigators will recruit cohorts of healthy middle-aged men and women to address their aims: * Demonstrate the sex-specific effects of skeletal muscle disuse (Phase 1) * Identify key molecular determinates of susceptibility of skeletal muscle atrophy (Phase 1) * Map the early, sex-specific molecular time-course of rehabilitation (Phase 2) * Determine if disused and healthy muscle respond similarly to exercise (Phase 2) Healthy, middle-age men and post-menopausal women (50-65 years) will be recruited from the greater Houston/Galveston area. This under-represented research demographic demonstrate few negative metabolic or phenotypic signs of advanced age, but are at increased risk of being hospitalized and experiencing accelerated loss of lean mass and muscle function that parallels a much older population. The goal of this study is to characterize phenotypic and molecular skeletal muscle changes in middle-aged men and women during critical periods of disuse and rehabilitation and ultimately direct the development of targeted and effective prevention and treatment strategies.