Background: The National Cancer Institute Surgery Branch (NCI-SB) has developed experimental therapies that involve taking white blood cells from patients' tumor or from their blood, growing them in the laboratory in large numbers, and then giving the cells back to the patient. Objective: This study will allow patients to under screening and evaluation for participation in NC-SB Protocols. Eligibility: Patients 18 years or older must meet the minimum eligibility criteria for an NCI-SB treatment protocol. Design Patients will undergo testing and evaluations as required by the appropriate NCI-SB treatment protocol.

Type: Observational

Start Date: Jul 1999

open study

This is a study to determine the effect of the human immunodeficiency virus (HIV) on lymphoid tissues (e.g., lymph nodes) as compared to peripheral white blood cells. We have shown in previous studies that the lymph node is a major site of accumulation of HIV in the body, as well as being a site where much of the viral replication occurs which leads to the destruction of the body's immune system. To better understand the role of the lymph node in HIV infection and destruction of one s immunity, we wish to examine both the virus itself as well as the effects it is having on various types of white cells (called lymphocytes) obtained simultaneously from both peripheral blood and lymph nodes of people living with HIV (PLWH). We also need to look at cells derived from blood and lymph nodes from people who do not have HIV to serve as a control for experiments. We may also use your lymph node tissue and blood cells to attempt to make new T-cells, or rebuild the immune cells, in the laboratory by adding various factors or other substances released by different cells in the body. If you are living with HIV, you may be asked to undergo a second biopsy six weeks to 12 months after the first biopsy. Because of the ability of aspirin to interfere with blood clotting, you must have refrained from the use of aspirin for one week (7 days) prior to the biopsy date. You also cannot use non-aspirin containing, non-steroidal, anti-inflammatory medications (e.g., ibuprofen, naproxen, and similar drugs) one week (7 days) prior to the biopsy. In addition, pregnancy testing will be performed on all females at the time of admission and a positive test will exclude you from participation. No participant will undergo more than six biopsies while participating in this study unless a particular research requires it.

Type: Observational

Start Date: Aug 1992

open study

Background: Turner syndrome (TS) is a rare genetic condition. It happens when a person is born missing all or part of an X sex chromosome. People with TS can have heart defects, short stature, autoimmune conditions, and malformations. Many women with TS never have periods and cannot conceive; however, some women have normal ovaries (egg cells). Researchers want to learn more about why some women with TS are fertile and others are not. To do this, they need to be able to compare the genes of many women who have TS. Objective: To create a genetic database of people with TS. Eligibility: People of any age with TS currently enrolled, or interested in enrolling in protocol 20-CH-0126. Biological parents and other relatives are also needed. Design: Participants who agree to join this study will be asked to enroll in a second study; that study is called "NIAID Centralized Sequencing Protocol" (Protocol No. 17I0122). Participants will have 1 study visit. They may fill out a survey or do an interview. They will provide blood, saliva, or other tissue samples. Those samples will be used for genetic tests. The visit will take 1 hour. The information collected in those tests will be collected for use in the database created as part of this study.

Type: Observational

Start Date: Mar 2026

open study

Background: SARS-CoV-2 is the virus that causes COVID-19. Some people who recover from COVID-19 have symptoms that last long after the active infection ends. This is called "long COVID." Sometimes, long COVID can affect the nerves and cause problems with sleep, thinking, the senses, and movement. Researchers want to find out whether people with long COVID have retained inactive remnants of SARS-CoV-2 in their bodies. Objective: To collect tissue samples to see if people with long COVID have remnants of SARS-CoV-2 in their bodies. Eligibility: People 18 years or older who have recovered from COVID-19, both with and without neurologic symptoms. Design: Participants will have 2 to 6 inpatient or outpatient visits over 4 months. Each visit will last 4 to 5 days. Participants will be screened to make sure it is safe to collect tissue samples from their body. They will have a physical and dental exam. They will have imaging scans and a test of their heart function. They will complete questionnaires about their health. They will give blood, urine, saliva, and stool samples. Their sense of taste and smell will be tested. Tissue samples will be taken from the digestive tract, lungs, colon, skin, muscle, lymph nodes, nasal passages, and mouth. Participants may be numbed or sedated for some of the procedures. Swabs will be used to collect cells from inside the mouth and nose. Participants will undergo lumbar puncture. A thin needle will be inserted into their lower back to draw out a sample of the fluid around their spinal cord. Participants will have follow-up phone calls after each clinic visit.

Type: Observational

Start Date: Mar 2025

open study

The purpose of this study is to first evaluate whether ICG fluorescence angiography can be used to evaluate blood flow of the anterior cruciate ligament (ACL), tendons, and knee structures during an arthroscopic surgery. The secondary purpose is to evaluate differences in the blood flow in patients with varying grades of ACL tears. To determine optimal intravenous dose of SPY Agent Green and time to visualize fluorescence in tendons and structures intraoperatively during arthroscopic surgery (if primary objective is deemed yes). We hypothesize that ICG will be effective in evaluating blood flow in patients undergoing knee arthroscopy.

Type: Interventional

Start Date: Jun 2026

open study

The goal of this feasibility randomized controlled trial is to assess the feasibility, acceptability, and demand, as well as preliminary effects of an evidence-based Intuitive Eating (IE) intervention among pregnant women who have obesity. The main questions we aim to answer are: RQ1: What is the feasibility (acceptability and demand) of implementing an Intuitive Eating Intervention among pregnant and postpartum women? RQ2: How does participation in the Pregnancy Intuitive Eating Intervention (PIE-I) impact key maternal health outcomes (i.e., gestational weight gain, intuitive eating behaviors, dietary quality, body image, and mental health) compared to a wait-list control? Researchers will compare the Pregnancy Intuitive Eating Intervention (PIE-I) intervention group with the wait-list control to see what impact the PIE-I has on maternal well-being. Participants randomized to the intervention group will complete the 8 week asynchronous IE intervention and have an opportunity to interview at the end of the study.

Type: Interventional

Start Date: Sep 2026

open study

This clinical trial evaluates the effects of exercise therapy on signs of colorectal cancer in colon tissue and blood in people who completed pelvic radiation therapy for prostate cancer. People who get radiation in the pelvic area have a higher chance of developing colon cancer years later. This is because radiation can cause new mutations and inflammation. Research shows that exercise lowers colon cancer risk by about 30%. The results of this trial may help researchers better understand how exercise affects the development of colorectal cancer in patients who were treated with pelvic radiation therapy for prostate cancer.

Type: Interventional

Start Date: Dec 2026

open study

To provide comprehensive evaluation of WaveLight® Plus technology by assessing impact on both functional low-light vision and patient reported outcomes

Type: Interventional

Start Date: Apr 2026

open study

The goal of this study is to help patients get seen sooner for behavioral health appointments by informing them about group therapy options, which allow more patients to be seen at once, often more quickly than 1:1 therapy. We will test whether messages describing the benefits of group therapy might encourage more patients to sign up for group therapy, thereby shortening patients' time to beginning therapy.

Type: Interventional

Start Date: Aug 2026

open study

Postoperative immobilization with a hard cervical collar following posterior cervical fusion remains common practice despite limited evidence demonstrating improved clinical outcomes. This is a prospective, multi-site, randomized clinical trial evaluating postoperative hard cervical collar use following posterior cervical fusion for degenerative cervical spine disease. Eligible patients will be randomized to either wear an FDA-approved hard cervical collar (Aspen Cervical Collar, Aspen Vista Cervical Collar, or Miami J Cervical Collar) for 6 weeks after surgery or receive no cervical collar. Patient-reported outcomes will be collected before surgery and at 2 weeks, 6 weeks, 12 weeks, 6 months, and 12 months after surgery. The primary outcome is radiographic fusion success at 12 months. Secondary outcomes include neck disability, neck and arm pain, quality of life, patient satisfaction, wound infection, adverse events, and other postoperative complications. Radiographic fusion will be evaluated by blinded radiologists. The results of this study will help determine whether routine postoperative cervical collar use improves outcomes following posterior cervical fusion.

Type: Interventional

Start Date: Jun 2026

open study

The study will evaluate how well AZD6234 works and how safe it is in adults with excess weight or obesity. Efficacy of AZD6234 will be compared to placebo in percent body weight change from baseline at 68 weeks of treatment

Type: Interventional

Start Date: Aug 2026

open study

Rotator cuff repair healing is highly variable with healing failure rates ranging from 11 to 94%. To this date, there are no specific biomarkers in shoulder tissues that can be associated with rotator cuff healing after surgery. The purpose of this study is to perform diagnostic imaging study (MRI without contrast), for research purposes, to subjects in the Orthopedics Biobank (IRB#202403832), to identify biomarkers associated with failure of rotator cuff repair healing. We will evaluate biomarkers in synovial fluid and shoulder tissues collected and analyzed as part of the IRB#202403832, and correlate the difference in biomarkers in patients that did and did not have signs of healing in the MRI. Secondarily, we aim to develop a model using demographics, radiographic parameters/MRI measurements and biomarkers to accurately predict rotator cuff repair healing rates at 1-year following surgery. This will be a study from a population of patients who are enrolled in the Orthopedic biorepository under IRB #202403832. Patients who underwent a rotator cuff repair will be invited to get an MRI without contrast of their operated shoulder at a period between 6 months to 1 year post-operative.

Type: Interventional

Start Date: Sep 2026

open study

This study will examine how common Long COVID is and how symptoms may persist over time in people who have previously had COVID-19. Researchers will collect information about participants' health and symptoms through questionnaires and may collect saliva and other non-invasive oral samples. The study will also examine biological factors in these samples that may be associated with persistent symptoms. The goal is to better understand why some people develop Long COVID and identify factors that may help predict who is more likely to experience persistent symptoms.

Type: Observational

Start Date: Sep 2024

open study

In this study, the investigators will use euglycemic/hyperinsulinemic clamps, longitudinal skeletal muscle biopsies, and single nucleus ribonucleic acid sequencing (RNA-Seq) and assay for transposase-accessible chromatin using sequencing (ATAC- seq) to reveal cell type-specific molecular response quantitative trait loci (rQTLs) acutely regulated by insulin signaling and glucose uptake.

Type: Interventional

Start Date: Aug 2026

open study

The protocol is designed to enroll patients from at least 3 diverse clinical sites with smartphones who are being evaluated for the presence or absence of atrial fibrillation (AF) using the Heart Rhythm Software algorithm running on their smartphones. Algorithm output will be compared to a gold standard of 12-lead ECG recorded with a simultaneous PPG measurement.

Type: Observational [Patient Registry]

Start Date: Jun 2026

open study

The primary objective of this study is to demonstrate non-inferiority in pharmacokinetic (PK) parameters of subcutaneous (SC) vs intravenous (IV) tarlatamab administration and to characterize the efficacy, safety, and tolerability of SC tarlatamab in participants with relapsed extensive-stage small-cell lung cancer (ES-SCLC) after platinum-based chemotherapy.

Type: Interventional

Start Date: Aug 2026

open study

The purpose of this study is to evaluate the efficacy of an investigational RAS(ON) inhibitor administered in combination with pembrolizumab and platinum-based chemotherapy doublet compared to placebo in combination with pembrolizumab and platinum-based chemotherapy doublet.

Type: Interventional

Start Date: Aug 2026

open study

The purpose of the study protocol is to identify imaging biomarkers for brain tissue under high metabolic stress at risk for permanent injury. We will measure oxygen extraction fraction (OEF) and cerebrovascular reactivity (CVR) in participants with and without perturbations in cerebral oxygen delivery over time to determine each parameter's role in clinical and radiologic neurologic outcomes. Measuring OEF can be done with specialized MRI sequences. Measuring CVR requires a vasoactive response, such as carbon dioxide. In order to deliver carbon dioxide evenly and as safely as possible, we will use RespirACT, an MRI-compatible device, to prevent over-breathing carbon dioxide and allow rapid steady-state physiology to minimize total scan time. We will also use a high density diffuse optical tomography (HD-DOT) cap to assess the measurement of OEF and CVR. This study will investigate both regional OEF and CVR simultaneously to understand each marker's unique developmental trajectory and contribution to stroke risk in children. This work will expand insights into mechanisms of stroke in children and assess the feasibility of the HD-DOT cap for obtaining these insights by comparing a cohort of optical CVR and a cohort of MRI CVR. In addition to the MRI and/or HD-DOT cap with RespirAct, participants may also have their vitals measured, complete cognitive testing, and complete a blood draw with a study visit. Participants may be followed for up to three years and may complete both an MRI scan and an HD-DOT scan within 1 week-12 months of each other. Participants may be invited back to repeat MRI and/or HD-DOT scans 1-2 times over the next three years.

Type: Interventional

Start Date: Oct 2025

open study

This is a Phase III, multicenter, randomized, double-masked, vehicle-controlled, parallel-group clinical trial designed to evaluate the efficacy, safety, and tolerability of d-MAPPS™ Ophthalmic Solution in adult subjects with chronic ocular graft-versus-host disease (oGVHD). Eligible subjects will receive masked study treatment for 90 days, with the primary efficacy assessment performed at the Day 90 study visit.

Type: Interventional

Start Date: Aug 2026

open study

Participants are being invited to take part in a research study about pain control after total knee replacement surgery (also called total knee arthroplasty or TKA). The goal of this study is to see if a new long-acting medication, called Zynrelef, can control pain after surgery as well as or better than two other common pain treatments - a nerve block or a standard injection into the knee during surgery. Knee replacement is done to reduce pain and improve movement in people with severe knee arthritis. While the surgery can be very successful, pain during the first few days after surgery can make recovery harder. Many patients need strong opioid pain medicines, but these medicines can have side effects and may lead to dependence. The investigators want to find ways to control pain that reduce or even remove the need for opioids. If participants join this study, they will be randomly placed (like flipping a coin) into one of three groups: Standard injection (PAI) - a mix of medicines injected into the knee during surgery. Zynrelef - a new long-acting medicine put directly into the knee during surgery, along with a smaller dose of the standard injection. Nerve block (ACB) - medicine given near a nerve in the leg before surgery to block pain. All participants will get the same medicines before and after surgery, follow the same physical therapy program, and have the same follow-up visits. Participants will be asked to record their pain scores and the pain medicines they take for several weeks after surgery. The risks of joining are small and similar to those of routine care. All three pain control methods are already used in regular knee replacement surgery. Possible side effects may include temporary numbness, weakness, or soreness from the injections, and the usual surgical risks such as infection. Participants may benefit from better pain control, less need for opioids, and a smoother recovery. The results from this study may also help future patients have safer and more comfortable knee replacements. Taking part is voluntary. Participants can leave the study at any time without affecting their medical care.

Type: Interventional

Start Date: Feb 2025

open study

This is an exploratory clinical study of copper-64 [Cu-64]-labeled granzyme B (GzmB)-targeted compounds for PET/CT imaging. The goal is to determine how GzmB-Targeted [Cu-64]-labeled compounds are distributed in the body by assessing PET/CT images and blood samples, and to assess the safety profile after a single intravenous dose. Up to 6 healthy volunteers (3 female, 3 male) will receive one injection of a GzmB-targeted [Cu-64]-labeled compound, then undergo multiple whole-body PET/CT scans, blood and urine tests over about 24 hours, and a follow-up phone call around Day 7. Up to 2 GzmB-Targeted [Cu-64]-labeled compounds may be assessed (i.e. maximum of 12 healthy volunteers in total in the study). Researchers will look at the blood activity of GzmB-Targeted [Cu-64]-labeled compound and the organ distribution and movement of the product in the body. They will also evaluate any changes in physical examination assessments, vital signs, ECG, and clinical laboratory measurements from pre-administration to post-administration.

Type: Interventional

Start Date: Jul 2026

open study

The purpose of this research is to compare the standard ambulatory ECG monitor, the MoMe ARC, against Fourth Frontier's "Frontier X Plus". This device is an FDA-Cleared chest-strap-based ECG wearable that provides an alternative modality to capture ambulatory ECG rhythm changes.

Type: Observational

Start Date: Aug 2026

open study

This study is a Phase 3 multicenter, randomized, controlled, assessor blinded, adaptive study in which subjects will be randomized in a 2:1(OCU410: control) ratio to treatment arm or control arm

Type: Interventional

Start Date: Aug 2026

open study

The purpose of this study is to better understand the biological changes associated with Long COVID and to identify laboratory tests (biomarkers) that may help diagnose the condition and measure how it changes over time. Researchers will enroll people with Long COVID as well as people who have fully recovered after COVID-19 infection. Participants will provide health information and biological samples, such as blood, saliva, stool, and, for some participants, tissue biopsies. These samples will be used to study the biological processes involved in Long COVID and to support the development of new diagnostic tests that may improve future research, clinical trials, and patient care.

Type: Observational

Start Date: May 2026

open study

This research aims to understand the feasibility and effectiveness of using the NeuroTechR3 System to improve upper extremity function after stroke.

Type: Interventional

Start Date: Aug 2025

open study