Healthy Clinical Trials

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

Light is the primary means by which the internal circadian clock remains aligned ("entrained") with the external world. Misalignment of this internal clock can occur during situations such as shift work and jet travel across multiple time zones (jet lag). The purpose of this study is to examine how sequences of brief flashes of light can affect entrainment of the clock. Read Less

Higher education is crucial for young adults in their intake of knowledge and skills to further their careers and reach their potentials. However, going through college is not necessarily an easy path. The purpose of this study is to enhance university students' well-being and educational experience by examining factors associated with stress and well-being. The investigator plans to recruit eighty participants from a large public university in the US to provide survey data and saliva samples at two waves during the data collection semester (beginning and end of the semester). Survey data will include demographic information and help gauge psychosocial factors related to stress and well-being. Saliva will be tested for two biomarkers each wave of data collection, cortisol (sampling three times a day for diurnal patterns for two consecutive days) and c-reactive protein, which indicate physiological stress/immune responses. Additionally, participants be randomly assigned to an intervention (n = 40) or control group (n = 40), where the intervention group will undertake a brief intervention focused on motivation and emotion regulation circa mid-semester and the control group will receive a placebo goal-setting short training. The investigator aims to examine whether intervention efforts can enhance end-of-semester psychological and physiological well-being, and particularly, whether students from diverse backgrounds (e.g., first-generation, low-income, and/or BIPOC) can benefit from the intervention. The investigator will use advanced quantitative data analysis (using Mplus v.8, in a structural equation modeling framework) to examine intervention efficacy and group differences. The investigator hypothesizes that those receiving the intervention will display a healthier profile at the end of the semester compared to their control group counterparts; and the investigator hypothesize students from diverse backgrounds will have significantly improved results from the intervention. The study will allow a better understanding to crucial steps towards exploring how to improve the well-being, higher-education pipeline, and retention of students with diverse backgrounds, providing insight on how each student's university experience can be improved. Read Less

Bovine atelocollagen skin testing of healthy adult volunteers to investigate the potential of allergy to atelocollagen medical device implants Read Less

Pulmonary hypertension (PH) is a serious condition characterized by a mean pulmonary artery pressure >=25mmHg on right heart catheterization (RHC). Despite advances in PH care, outcomes are still sub-optimal and further research is required into the pathobiology of the disease and development of biomarkers that can guide clinical care. The investigators are establishing a biobank to collect samples (blood, urine, stool) from patients with pulmonary hypertension, patients at high risk for pulmonary hypertension, healthy controls, and patients undergoing right heart catheterization. Specimens will be stored for future investigations. Read Less

The main goal of this research is to determine the role of several brain regions in memory processes and cognitive functions. Participants will be remotely supervised via video chat while self-administering tDCS, a form of non-invasive brain stimulation. Before participating in the experiment, participants will be properly trained on use of the remote tDCS device and screened for eligibility. While using the tDCS device, participants will be engaging in tasks that assess different aspects of memory and executive functioning. By using remotely supervised tDCS while participants are completing these cognitive tasks, we will be able to make causal claims about the role of the targeted brain regions in different cognitive processes. Read Less

This is a randomized, double-blind, placebo-controlled, dose-escalation study to evaluate the safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD) of a single dose of MT2004 following oral single and multiple ascending dose administration. Read Less

Study is to assess the effects of food on the Pharmacokinetics(PK) of single-dose administration of K-877 in healthy adult volunteers. Read Less

The purpose of this study is to test different methods of preparation that can be used prior to a test called an FDG PET/CT scan. FDG PET/CT scans are routinely done for evaluation of heart inflammation. Standard preparation for the scan includes a ketogenic (high fat and low carbohydrate) diet for 24 hours and overnight fasting to help suppress the amount of sugar taken up in the heart muscle. However, Investigator still do not know if this preparation is the most effective method. So the Investigator, want to investigate alternative methods for decreasing the amount of sugar uptake seen in the heart during FDG PET/CT scan, thus, investigator will have participants try up to 3 different methods of preparation prior to the FDG PET/CT scans to see which type of preparation works the best. 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