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Sample Collection From Healthy Volunteers for Assay Optimization
Background: The Laboratory of Immune System Biology (LISB) works with other labs at the National Institutes of Health. They study how parts of living things c…
Reproductive Axis Maturation in the Early Post-Menarchal Years: A Pilot Study
Background: Most adult women with irregular periods of unknown cause report symptoms dating back to early adolescence. This study aims to learn how girls' per…
An Open-label, Phase 1 Study to Individually Characterize the Food Effect, the Drug-Drug Interaction Effect of OAT Inhibition, and the Drug-Drug Interaction Effect of P-glycoprotein Inhibition on the Pharmacokinetics of MK-8527 in Healthy Adult Participants
Researchers are studying a medicine called MK-8527 to learn how it behaves in the body of healthy adults. The goal of this study is to learn about the effect …
Early Metabolic Effects of Antiretroviral Drugs in Healthy Volunteers: A Phase 2 Randomized Study
Background: People with HIV take drugs to keep the amount of virus in their body low. One type of these drugs, called integrase strand transfer inhibitors (IN…
A Phase 1 Single and Multiple Dose-Escalation Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of SR604 in Healthy Participants (Part A) and the Safety, Tolerability, Pharmacokinetics, Pharmacodynamics, and Efficacy of SR604 in Participants With Hemophilia A or Hemophilia B or Factor VII Deficiency (Part B)
The purpose of this study is to evaluate the safety, tolerability, pharmacokinetics (PK), and pharmacodynamic (PD) of SR604 in healthy participants (Part A) an…
Role of Theta Frequency Oscillations in Proactive and Reactive Control Processes in Youth With Attention Deficit Hyperactivity Disorder (ADHD) and Obsessive Compulsive Disorder (OCD)
Background: Attention deficit hyperactivity disorder (ADHD) is common in children. It can cause problems with attention and the ability to control actions and…
The Effects of Urolithin A Supplementation on Glucose Metabolism in Healthy Adults >= 55 Years Old. A Randomized Triple-Masked Controlled Clinical Trial
Background: As people age, the cells in the pancreas that produce insulin begin to release less of this hormone, and levels of blood glucose (sugar) rise. Thi…
Evaluation of [11C]ZTP-1 to Image PDE4B
Background: PDE4B is a protein in cells that helps turn off certain chemical signals after they ve done their job. It controls inflammation, immune responses,…
Assessing the Impact of Perceptions of Unpredictability on Objective Measures of Food Consumption and Metabolism: A Natural History Study
Background: Many people in the United States are overweight or obese. This natural history study will look into how life events during childhood can impact ea…
Children's Growth and Behavior Study
Background: \- Studies show that many factors affect children's eating behavior and health. These include sleep, mood, thinking skills, and genetics. Studying…
Can Exogenous Ketone Supplementation Compensate for Glucose Hypometabolism and Improve Cognitive Processing Speed in Veterans With Prediabetes?
Brief Summary The goal of this clinical trial is to learn whether older adults with prediabetes, but no diagnosed cognitive impairment, show early changes in …
Regional Cerebral Blood Flow Studies of Object Perception, Identification, Localization, and Memory
The purpose of this study is to use brain imaging technology to measure changes in blood flow to areas in the brain as individuals perform intellectual tasks. …