Background: Trisomy 8 mosaicism is a genetic disorder that can increase inflammation in the body. Symptoms include fevers; sores or ulcers in the mouth, digestive tract, or genital area; skin rashes; problems in organs or tissues; and changes in bone marrow cells. Researchers want to conduct a natural history study to learn more about these symptoms and what causes them. Objective: To gather data and samples from people with and without the trisomy 8 mosaicism. Eligibility: People of any age with the trisomy 8 gene mosaicism. Their healthy relatives are also needed. Design: Affected participants will have visits every 1 to 2 years for 30 years at NIH. Each visit will take 1 to 5 days and may be in-person or remote. With remote visits, participants may have a video call with the study team and samples may be sent to researchers by mail. Participants may have these procedures: Physical exam, with blood tests. Tests of brain function and motor skills. Sensory tests. Researchers will see how participants respond to sensations such as pinpricks, heat, cold, and pressure. Magnetic resonance imaging (MRI) scan of the brain and/or spine. X-ray of the spine. Ultrasound test of heart function (echocardiogram). Tissues samples (biopsies) collected from the skin, inside of the mouth, and bone marrow. Swabs to collect cells from the mouth, skin, and vagina. Collection of blood, stool, urine, saliva, hair, and fingernail samples. X-rays, MRI, and heart tests will be done only once. Other procedures may be repeated at each visit. All tests and procedures are voluntary. Healthy relatives who enroll will have a baseline visit and then follow-up visits as needed. They will have a physical exam. The inside of their mouth may be swabbed. Samples of blood, stool, urine, and saliva may be taken.

Type: Observational

Start Date: Sep 2026

open study

Background: Irritability can be defined as an unusually strong response to frustration; these responses may include severe temper outbursts and a constant grumpy mood. Irritability is a common symptom of many mental health disorders. Little is known about how the brain responds to frustration, and few treatments are available for this problem. Researchers want to know more about how the brain responds to frustration. Objective: To learn how the brain responds to frustration. Eligibility: Healthy adults aged 18 to 55 years. They must have been screened through studies 01-M-0254 or 17-M-0181. Design: Participants will have up to 3 study visits in 2 months. Each visit will last up to 4 hours. Visit 1: Participants will be screened. They will have a physical exam. They will complete questionnaires about how often and how easily they get angry or grumpy. They will be trained to use a device that measures hand grip. Visit 2: Participants will have a magnetic resonance imaging (MRI) scan. They will lie on a table that slides into a tube. Padding will hold their head still. Visit 3: Participants will undergo magnetoencephalography (MEG). A cone with detectors will be lowered over their head while they are seated. The MEG will measure the magnetic fields in the participant s brain both while they are resting and while they are doing the frustration task. For the task, they will hold a grip device in each hand. They will use the devices to pick 1 of 2 doors on a computer screen. The task has 3 parts. The participant s face will be filmed during this task.

Type: Interventional

Start Date: Feb 2025

open study

Background: At least 30% of Americans have fatty liver disease. This means that they store too much fat in the liver. At the moment lifestyle changes are the only way to treat this problem. Objective: To test how (1) a low-carbohydrate diet and (2) a supplement called nicotinamide riboside (NR) affect how a person s body uses dietary fat. Eligibility: Men aged 18 to 65 and women aged 18 to 50 who are healthy volunteers with a body mass index (height to weight ratio) of 25 or more. Adults with maturity-onset diabetes of the young type 2 (MODY2) are also needed. Design: Participants with diabetes will have 1 screening visit and a 9-day clinic stay. Healthy volunteers will have 1 screening visit and 2 clinic stays of 1 to 2 weeks each. During screening, all participants will have a physical exam with blood and urine tests. They will have their heart rhythm measured while riding a gym bike. NR is a pill taken by mouth. Only healthy volunteers will take the NR, for 14 days at a time, during 1 clinic stay. During their other stay, they will take placebos; these are pills that look like the study supplement but contain no NR. During each clinic stay, all participants will eat a normal American diet. Then they will eat a ketogenic "low-carb" diet for 5 days. Participants will have many tests, including: Sleeping every night and having two 24-hour stays in a special room that measures the gases their body uses and produces. Drinking a high-fat shake, then remaining seated for 5 hours while their blood and breath are monitored. Having a substance injected into the arm and remaining seated for 3 hours while their blood is measured. Wearing monitors to measure their activity levels. Another monitor will measure their blood glucose levels. Having imaging scans. ...

Type: Interventional

Start Date: Jan 2024

open study

The goal of this clinical trial is to examine perceptions of virtual human communicators and cancer research recruitment messages. This study will also examine how different informed consent approaches influence decisions to participate in research.

Type: Interventional

Start Date: Jul 2026

open study

This study evaluates the effects of daily consumption of a yogurt on immune function and subjective health status in healthy adults in the United States. Participants are randomly assigned to receive either the active yogurt or a placebo once daily for 8 weeks. The study assesses immune function using salivary immunoglobulin A and other immune-related biomarkers. The study also evaluates cold-like symptoms, quality of life, gastrointestinal symptoms, stress, and sleep-related outcomes.

Type: Interventional

Start Date: Sep 2026

open study

The purpose of this prospective study is to investigate whether ophthalmic artery stenosis (narrowing of the ophthalmic artery) contributes to the development and progression of geographic atrophy (GA), an advanced form of dry age-related macular degeneration (AMD).

Type: Observational [Patient Registry]

Start Date: Sep 2026

open study

The purpose of this study is to find out if a psychotherapy method called brief behavioral activation (BBA) can improve depression, anxiety, and overall well-being and encourage healthy lifestyle behaviors in English- and Spanish-speaking Older Adult Cancer Survivors (OACS). BBA is a therapeutic technique that guides people to set goals and engage in enjoyable or rewarding activities as a way of changing behavior and reducing symptoms of depression. In this study, BBA will be given by telephone or videoconference (remotely).

Type: Interventional

Start Date: Aug 2026

open study

The purpose of this clinical study is to look at how well a study medicine called cagrilintide helps people living with excess body weight to lose weight. Participants will either get cagrilintide, the active study medicine being tested or placebo, a medicine that has no active medicine in it. Which treatment participants get is decided by chance. Cagrilintide is a new medicine under development that doctors cannot prescribe yet, but it has been tested in humans before. Participants will be in this clinical study for about 9 months.

Type: Interventional

Start Date: Aug 2026

open study

This study is being conducted to look at the effect YB-101 has on thyroid function. This study will also evaluate how safe and well tolerated YB-101 is and how it is distributed through the body. The study consists of a part 1, blinded treatment period, and a part 2 double-blinded treatment period. Participants will receive YB-101 or Placebo subcutaneously. Participants who participate in Part 1 can not participate in Part 2. Participants will complete 34-39 in-clinic visits in Part 1 or Part 2 over an approximate 40 week period.

Type: Interventional

Start Date: Jun 2026

open study

The purpose of this study is to learn whether adding extra doses of azithromycin to the standard antibiotic treatment for preterm prelabor rupture of membranes may improve pregnancy outcomes for patients between 22 weeks and 28 weeks gestational age. Researchers will compare the standard antibiotic treatment to the standard antibiotic treatment with additional doses of azithromycin. Participants will: - Be randomly assigned to one of two groups: - The standard antibiotic treatment - The standard antibiotic treatment plus 7 additional doses of oral azithromycin 500 mg every other day. - Participants will be asked to complete a survey regarding their experience and side effects.

Type: Interventional

Start Date: Aug 2026

open study

The purpose of this study is to evaluate the long-term safety, tolerability and efficacy of remibrutinib (LOU064) in adult participants with moderate to severe hidradenitis suppurativa (HS) who have completed either of the preceding Phase 3 studies, CLOU064J12301 or CLOU064J12302.

Type: Interventional

Start Date: Jul 2026

open study

The goal of this study is to help children with autism and a co-occurring intellectual disability and their families learn practical strategies for managing issues like irritability, aggression, and other challenging behaviors. The main objective of this study is: To adapt current Regulating Together materials to create an outpatient group program for emotion dysregulation in autism and co-occurring intellectual disability (ASD + ID) that will improve psychosocial outcomes for youth with ASD + ID.

Type: Interventional

Start Date: Oct 2027

open study

This study will evaluate whether the InTune product system may help support attention, memory, focus, and other thinking skills in healthy adults ages 18-64. Participants will be randomly assigned to receive either the InTune products or placebo products that look and feel the same but do not contain active ingredients. Participants will use the products throughout their participation in the study and complete a series of cognitive tests and questionnaires at the beginning and end of the study. Researchers will compare changes in memory performance, self-reported mental clarity and focus, product experiences, and any side effects between the two groups.

Type: Interventional

Start Date: Jun 2026

open study

The main objective of this study is to evaluate the effect of ION775 on fasting triglyceride (TG) levels in participants with hypertriglyceridemia (HTG) and severe hypertriglyceridemia (sHTG).

Type: Interventional

Start Date: May 2026

open study

This study will evaluate the pharmacokinetic effects of acute and chronic dosing of a hemp-based cannabidiol (CBD) topical lotion with low levels of delta-9-tetrahydrocannabinol (THC) in a sanitized and controlled environment.

Type: Interventional

Start Date: May 2026

open study

Researchers are looking for new ways to treat certain types of advanced and/or metastatic solid tumors. The main goal of this study is to learn about the safety of different doses of MK-4884 and if participants tolerate them.

Type: Interventional

Start Date: Jun 2026

open study

The purpose of this clinical study is to learn about the effects and safety of berobenatide (PF-08653944). This may help people with overweight or obesity lose weight. People in this study may also have type 2 diabetes. About 950 adults will be in this study. Berobenatide will be compared to a placebo. A placebo does not have any medicine in it but looks just like the medicine being studied. Berobenatide or placebo is given by a shot under the skin in the belly area. The objective of the study is to compare the experiences of people receiving berobenatide to those of the people who do not to assess if the study medicine is effective and safe. People will take part in this study for about 20 months. During this time, they will have about 15 study visits at the site. They will also have 2 study visits over the phone.

Type: Interventional

Start Date: Jun 2026

open study

The purpose of this study to find out whether mirdametinib is a safe and effective treatment for Central Nervous System/CNS tumors (glioma and neurohistiocytosis).

Type: Interventional

Start Date: Apr 2026

open study

This open-label extension study will provide post-trial access to pelacarsen (TQJ230) to participants who have successfully completed the double-blind parent study (CTQJ230A12301).

Type: Interventional

Start Date: May 2026

open study

The purpose of this study is to evaluate the efficacy, safety, and tolerability at Week 24 of 2 doses of CHF10067 (zampilimab) in participants with idiopathic pulmonary fibrosis (IPF). It is a phase IIb, multicentre, randomised, double-blind, placebo-controlled, three-arm parallel-group study. A total of 240 participants with IPF (Idiomatic Pulmonary Fibrosis) will be randomised in approximately 150 investigational sites in North and Latin America, Europe, Asia, and Oceania.

Type: Interventional

Start Date: Jul 2026

open study

The purpose of this study is to measure decreases in daytime sleepiness, and disease symptoms in participants with Narcolepsy Type 2 (NT2) when taking ALKS 2680 tablets compared with placebo tablets.

Type: Interventional

Start Date: Apr 2026

open study

The purpose of this study is to evaluate the pharmacodynamic (PD) effect, safety, and tolerability of Povetacicept in participants with generalized myasthenia gravis (gMG).

Type: Interventional

Start Date: May 2026

open study

The goal of this clinical trial is to learn about the safety and recommended dose of TRI-611 when administered to adults with ALK-positive non-small cell lung cancer (NSCLC). The trial will also evaluate the antitumor activity of TRI-611 in adults with ALK-positive NSCLC. The study will be conducted in two parts. The first part will examine different doses of TRI-611. The second part will look at how well TRI-611 works on ALK-positive NSCLC when administered to three groups of participants that differ based on what type of prior therapy they have received. In this study participants will: - Take TRI-611 on a continued basis, provided it is well-tolerated, for as long as their disease is not progressing - Visit the clinic approximately seven times in the first 3 months and then just once at the start of each 28-day cycle thereafter - Keep a diary of each time they take the study medication

Type: Interventional

Start Date: Mar 2026

open study

Managing HIV well requires taking antiretroviral therapy (ART) every day, but many people living with HIV experience interruptions in their treatment. These pauses in medication can happen for many reasons, such as side effects, challenges with getting to the clinic, personal circumstances, stigma, or difficulties with everyday life. When HIV treatment is stopped, the viral load can increase, which may affect a person's health and make it easier for HIV to be passed on to others. Restarting treatment quickly after an interruption is important for both personal and public health. However, it can be difficult for people who miss doses to get back on treatment right away. There are often several steps and medical appointments required before restarting, such as waiting for lab results or reviewing medical history, which can cause further delays. These additional steps can make it even harder for people to re-engage and may discourage them from returning to care. The REINITIATE study is designed for people living with HIV who have not taken any antiretroviral medications for at least the last 12 weeks. The study will offer participants a way to restart their HIV therapy quickly, by beginning treatment with B/F/TAF on the same day that they return to care. B/F/TAF is a widely used, once-daily HIV regimen, and is recommended in national treatment guidelines. Researchers want to find out if this rapid restart approach is safe and effective, and whether it helps people regain control of HIV and remain in care. The study will also examine how many participants are able to keep the virus at a low level (viral suppression), stay engaged in their HIV care, and tolerate the medication after rapidly restarting treatment. In addition, the study will include interviews with some participants, to gain a better understanding of why they stopped taking their medications and what supported their return to treatment. These insights could help healthcare teams develop better ways to support people living with HIV in the future.

Type: Interventional

Start Date: Jun 2026

open study

The purpose of this study is to measure decreases in daytime sleepiness, cataplexy (sudden loss of muscle tone), and disease symptoms in participants with NT1 when taking ALKS 2680 tablets compared with placebo tablets.

Type: Interventional

Start Date: Apr 2026

open study