Healthy Clinical Trials

The purpose of this research study is to investigate how the brain, memory, thinking, and motor behavior change both in individuals with movement and/or cognitive disorders, as well as healthy individuals. Researchers will look at measurements of memory, thinking, brain wave and muscle activity, daily functioning, and brain scans to learn more about brain disorders such as Alzheimer disease and Lewy body disease. Read Less

This is a mechanistic, controlled, open-label, single-site study to evaluate the effects of RG-RV16 inoculation on airway mucosal gene expression and airway remodeling in 25 healthy controls (HC), in 25 allergic rhinitis subjects (AR) with cat dander allergy, and in 25 allergic asthmatic subjects (AA) with cat dander allergy. Three groups (HC, AR, and AA) will undergo screening to establish clinical history, will undergo pulmonary function testing (spirometry), and will have blood drawn for clinical characterization (IgE, , ImmunoCAP, CBC and differential), and for assessing the presence of existing neutralizing antibody against RV16. Only those who meet criteria will be permitted to continue into the interventional and run-out phases of the study. Read Less

Carbon fiber custom dynamic orthoses (CDOs) consist of a proximal cuff that wraps around the leg just below the knee, a posterior carbon fiber strut that stores and returns energy during gait, and a carbon fiber foot plate that supports the foot and allows bending of the posterior strut. The proximal cuff is a primary interface between the patient and the CDO and may influence comfort, preference, limb mechanics and loading, and effective stiffness of the CDO. The important role of the proximal cuff has not been examined. The purpose of this study is to determine the effects of CDO proximal cuff design on patient reported outcomes, limb mechanics and loading, and CDO mechanical characteristics. Read Less

The purpose of this study is to test a novel diagnostic immunoassay of platelet function and compare it to the current gold standard platelet function assay by testing the response to aspirin and clopidogrel in a group of healthy volunteers and severely obese individuals and comparing the accuracy of the two tests. The secondary goals will be to evaluate the pharmacodynamic parameters of the antiplatelet agents across the two testing modalities and refine the cutoffs used for the novel assay. Read Less

The goal of this clinical trial is to identify any differences in elbow ulnar collateral ligament (UCL) relative thickness and joint space laxity in the dominant arm following an 8-week course of low intensity resistance exercises with blood flow restriction (BFR) exercises in healthy volunteers. The main questions it aims to answer are: 1. Do BFR exercises contribute to a change in the relative ligament thickness of the UCL, and changes in the ulnohumeral joint space? 2. Are there changes in arm strength following the 8-week strengthening protocol with/without BFR? Participants will: * Complete two BFR sessions a week for a total of eight weeks. * Complete an exercise session with both arms (dominant arm will receive BFR) at each study visit. * Have sonographs taken of the UCL at the first and last study visit. * Complete strength assessments at the first and last study visit. Read Less

With the completion of the human genome project, investigators can now explore new questions in human biology. Previously human genetics focused on highly penetrant, Mendelian traits; however, now rare and common variants can be discovered that affect "common" diseases that have multi-gene architecture with variable penetrance such as breast cancer, diabetes mellitus, and coronary artery disease. This change took place because investigators now have the tools to illuminate the whole genome at once to discover the genetic variants responsible for different disease phenotypes through statistical differences between populations. Besides disease phenotypes, health can be considered a human phenotype that can be studied. Health is not merely the absence of disease but may be viewed as a dynamic ongoing interplay between the environment and the genome to maintain homeostasis. Individuals often attempt to optimize environmental conditions according to ones genome to maximize their health. All individuals possess potentially beneficial and harmful variants depending on the environment. How this dynamic interplay occurs between the genome and environment requires understanding the boundary conditions of the genetic architecture of health and disease and then modeling the system to simulate the observed data. The aging process also affects health. Aging involves a loss of the normal coping responses to internal and external environmental stressors or signals. Investigators now have the tools to uncover from the bottom up the mechanisms involved in maintaining the ability to overcome environmental conditions that can affect health. Against this genomic breakthrough of whole genome association studies, the demographics in the United States are quickly changing. The older population (age \> 65 years) in 2030 is projected to be twice as large as in 2000 representing nearly 20 percent of the total US population. The first baby boomers turn 65 in 2011 and will challenge all facets of health care in the coming decades. The demographic changes underscore the need to understand the mechanisms that promote health and disease in this cohort. Genomic discoveries will help individuals and may reduce medical costs and benefit society. In summary, the objective of this study is to obtain blood and/or saliva samples in order to help model health and disease phenotypes through population genomics. The blood and/or saliva samples may allow for participants' entire genomes to be sequenced if such comprehensive analysis becomes feasible and economical. Read Less

The goal of this study is to learn about how the hormone insulin controls blood sugar in a variety of people. The main question it aims to answer is about how much insulin the body actually needs to maintain a normal blood sugar level. Participants will be asked to come in for a one-day study visit in which they will undergo a "graded insulin suppression test" ("GIST"). The GIST involves intravenous (into the vein) infusions of octreotide, a medication that turns off the body's own production of insulin, as well as replacement of insulin at two different levels (low and high), with or without replacement of glucagon, and glucose (sugar). The study investigators will check blood sugar levels every few minutes during the procedure to determine the effect of the two different insulin levels. This study will evaluate the GIST in both healthy volunteers and those at higher risk for type 2 diabetes. Read Less

The way people process and remember information may be related to adverse childhood experiences and Opioid Use Disorder symptoms. The purpose of this project is to examine brain function and performance during learning and memory tasks in adults. The study will compare measures of learning and memory across three groups of participants: those with an Opioid Use Disorder (OUD) that take buprenorphine for opioid replacement therapy, adults without an Opioid Use Disorder taking buprenorphine, and healthy adults that do not have an Opioid Use Disorder and are not taking buprenorphine. Read Less

The result of these studies will be used to improve patient care through assessment of new technology to determine whether it is beneficial (i.e. improving data acquisition speed or image quality) during iMRI procedures. Read Less

The purpose of this study is 1) to investigate how safe and tolerable SUVN-I6107 is after a single oral dose at increasing dose levels and multiple oral doses at increasing dose levels, 2) to determine the pharmacokinetic (PK) profile after single and multiple ascending oral doses, 3) to investigate the effects of food on SUVN-I6107 pharmacokinetics and 4) to evaluate the pharmacodynamic (PD) effects of single and multiple ascending oral doses of SUVN-I6107 on quantitative electroencephalogram (qEEG) and event-related potential (ERP) assessments. Read Less

The purpose of this study is to investigate how gut hormones and brain areas respond differently to gastric distention, tasteless calories, or palatable food and how this alters appetite. Read Less

This research study aims to determine whether and how caffeine intake affects learning process through reward feedback compared to placebo. The data acquired from this study would improve our understanding on the consequence and mechanism of caffeine intake in the aspect of learning process. Participants will perform a reinforcement learning task (i.e. Probabilistic Selection Task) and a motor inhibition task (i.e. Go/NoGo task) in a brain scan. The scan will be done with the Siemens Biograph mMR positron emission tomography (PET)/ magnetic resonance imaging (MRI) 3 Tesla scanner. The PET allows us to see the changes in the "reward signals" - dopamine - in the brain using a radioactive dye called \[11C\]Raclopride. The MRI, on the other hand, enables us to take detailed pictures of the brain activities during cognitive tasks using a high-powered magnet. Reviewing these pictures will help us understand the influence of caffeine on reward signals and brain activities during the learning process. Read Less