Healthy Clinical Trials

This research study is being done to provide comparative data to the Mayo Clinic Adult Congenital Heart Disease Registry. Read Less

This is a randomized, blinded, placebo and active-controlled, 4-period, crossover design thorough QT/QTc (TQT) study to evaluate the effect of ABBV-CLS-7262 on cardiac repolarization in healthy adult subjects. Read Less

More than 250 million courses of antibiotics are prescribed annually in the ambulatory care setting in the United States alone, including more than 40 million in children under 18 years of age. The perception that antibiotic use has minimal attendant adverse side effects contributes to the over-utilization of antibiotics in clinical circumstances when they are not strictly indicated. We have learned much about the human microbiome. The emerging view is of profound life-long bi-directional interactions between our microbiota and our cells. Perturbations in the microbiota affect metabolic, immune, and cognitive physiology in experimental animal models. When a person takes an antibiotic, the antibiotic diffuses via the blood into all body compartments, selecting for resistance. We propose to examine the effects of two commonly used antibiotics (the beta-lactam, amoxicillin and the macrolide azithromycin) on human microbial populations and on metabolic and immune physiology, studying healthy human volunteers in a randomized controlled clinical trial at the NIH Clinical Center. Our hypothesis is that in addition to acutely perturbing the human microbiome, these agents will have measurable metabolic and immunologic effects, with residual effects in the weeks that follow. To test this hypothesis, we will assess the effects of a brief therapeutic course of antibiotics on microbiome and metagenome composition. After an initial evaluation period, antibiotics will be given for 7 days or 5 days (depending on the antibiotic), and there will be a post-treatment evaluation. A control group will receive no drug intervention. Specimens will be obtained from multiple sites at each of 10 time points occurring before, during, and after antibiotic administration, and used for estimating bacterial and fungal composition and gene content. We will also assess the effects of the antibiotic course on markers of innate and adaptive immunity as well as markers of metabolic and hormonal physiology. A subgroup of subjects will be studied in the clinical center metabolic chamber to assess 24-hour energy expenditure and its components (sleeping, diet-induced, and activity energy expenditure), as well as macronutrient oxidation rates (carbohydrate, fat, and protein), during 3 of the 10 study visits. In addition to the primary data analyses, we will build a model that integrates the temporal data to begin to understand the complex intertwined physiology between microbiome and host. Read Less

Many scientific papers have reported that ERP and QEEG biomarkers can be useful in the evaluation of neurological and psychiatric disorders. A study previously conducted with the COGNISION® system has shown how data collected with the system could help detect cognitive deficits in elderly individuals with probable early Alzheimer's disease (Cecchi et al., 2015). Furthermore, normative ranges for ERP and QEEG parameters are sensitive to subject age (see for example van Dinteren et al., 2014). This study will use advanced EEG techniques to measure brain function among healthy adults ages 20 through 59 to use as reference data to compare against individuals that suffer from neurological and psychiatric disorders. QEEG and ERP parameters from the current study will compliment previously collected normative data in healthy subjects 60 years of age and older (Cecchi et al., 2015). Read Less

The main purpose of this study is to measure how much of LY3437943 gets into the bloodstream and how long it takes the body to eliminate it in participants with mild, moderate and severe impaired liver function compared to healthy participants with normal liver function. The safety and tolerability of LY3437943 will also be evaluated. The study may last up to 9 weeks for each participant including the screening period. Read Less

The main purpose of this first-in-human study to investigate the safety of LY3839840 in single and multiple doses, and how it's processed in the body when given in different amounts. Read Less

The investigators are doing this research study to compare whole body aerobic training with isolated leg training (with weights) and its impact on effectiveness in symptoms and quality of life in patients with Pulmonary Arterial Hypertension (PAH). Read Less

The New York Stem Cell Foundation (NYSCF) Research Institute is performing this research to accelerate Charcot-Marie-Tooth disease research and drug development by using cells from the body (such as skin or blood cells) to make stem cells and other types of cells, conduct research on the samples, perform genetic testing, and/or store the samples for future use. Through this research, researchers hope to identify future treatments or even cures for Charcot-Marie-Tooth disease. Read Less

Groups of unimpaired participants will all receive speech motor training of nonwords, and six tDCS conditions will be compared: anodal tDCS over speech motor regions; cathodal tDCS over speech motor regions; anodal tDCS over left frontal regions; cathodal tDCS over left frontal regions; cathodal stimulation over non-speech motor regions (anodal already collected);and sham tDCS (no stimulation). This will address a basic science question about whether the mechanism underlying speech motor learning requires premotor and motor cortical regions to be stimulated, which has implications for treatment of acquired speech impairment. The primary outcome measure will be the difference in production accuracy and changes in motor acuity (measured with duration) of novel consonant cluster production. Read Less

Sarcoidosis is a multisystem granulomatous disease of unknown cause that can affect any organ in the body, including the heart. Granulomatous myocarditis can lead to ventricular dysfunction and ventricular arrhythmias causing significant morbidity and mortality. Immunosuppressive therapy (IST) has been shown to reverse active myocarditis and preserve left ventricular (LV) function and in some cases improve LV function. In addition, IST can suppress arrhythmias that develop due to active myocarditis and prevent the formation of scar. The potential role of cardiac biomarkers, including brain natriuretic peptide (BNP), atrial natriuretic peptide (ANP), and cardiac troponins, in detecting active myocarditis is limited and studies have been disappointing. At present, there are no biomarkers to detect active myocarditis and the use of advanced imaging modalities (FDG-PET) for assessing and monitoring active myocarditis is not feasible or practical and is associate with high radiation exposure. As such, a biomarker that is reflective of active myocarditis and that is cardiac specific will assist physicians in assessing the presence of active myocarditis to guide therapeutic decisions and to assess response to therapy which can limit further cardiac damage. Cell free DNA (cfDNA) are fragments of genomic DNA that are released into the circulation from dying or damaged cells. It is a powerful diagnostic tool in cancer, transplant rejection and fetal medicine especially when the genomic source differs from the host. A novel technique that relies on tissue unique CpG methylation patterns can identify the tissue source of cell free DNA in an individual reflecting potential tissue injury. We will be conducting a pilot study to explore the utility of this diagnostic tool to identify granulomatous myocarditis in patients with sarcoidosis. Read Less

Moderate to vigorous intensity physical activity is known to reduce the risk of hypertensive disorders of pregnancy and other adverse pregnancy outcomes that increase future maternal cardiovascular disease risk (2018 Physical Activity Guidelines Advisory Committee, 2018; Davenport et al., 2018), yet less than 25% of pregnant women meet public health physical activity guidelines (Hesketh & Evenson, 2016). More than 95% of the 24-hour day is spent in sedentary behavior, sleep, or light-intensity activity; however, the impacts of these lower intensity activities on adverse pregnancy outcomes are unknown. This multi-site observational cohort study (N=500) will leverage state-of-the-art, 24-hour behavior assessment in each trimester of pregnancy and examine associations with adverse pregnancy outcomes to inform guidelines and future interventions designed to improve women's pregnancy and long-term cardiovascular health. Read Less

The purpose of the study is to investigate the effect of multiple doses of a proton-pump inhibitor (PPI) esomeprazole on the PK of vepdegestrant under fed conditions in healthy adult participants. All participants in this study will receive one dose of vepdegestrant alone by mouth in Period 1. In Period 2, everyone will receive esomeprazole by mouth once a day for multiple days. Participants will also receive one dose of vepdegestrant by mouth. The levels of vepdegestrant in Period 1 will be compared to the levels of vepdegestrant in Period 2 to determine if the PPI affects how vepdegestrant is processed differently in healthy adults. Read Less