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Discover 23,284 clinical trials near Maryland. Find research studies in your area.
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NCT06093867
Background: Stem cell transplants (called hematopoietic stem cell transplantation, or HSCT) are used to treat various diseases. But when the cells for this procedure are donated by someone other than the person who receives the HSCT ( allogeneic HSCT ), the recipient has an increased risk of lung inflammation and scarring. This happens when their immune cells attack healthy lung cells. In this natural history study, researchers will look for the best ways to detect developing lung inflammations earlier after an HSCT. Objective: To see if certain tests can detect early signs of lung inflammation in people after HSCT. Eligibility: People aged 5 to 70 years who will have HSCT as part of another NIH study. Design: Participants will undergo these tests prior to their HSCT. These tests will then be repeated regularly for 2 years: Ultra-low dose computed tomography (CT) scans. Participants will lie on a table that slides through a machine; the machine uses X-rays to get pictures of the inside of the body. This type of scan uses less radiation than normal CT scans. Bronchoscopy with lavage: Participants will be sedated. A flexible tube will be inserted through the mouth and into the airways. Salt water will be squirted into the lung, then sucked out to collect cells and fluids from the lung. Another tube with a camera may be inserted into the airways to take pictures. Blood tests. Blood will be drawn every 2 to 4 weeks. Pulmonary function tests. Participants will breathe into a machine to test their lung function. They will see how far they can walk in 6 minutes.
NCT06948110
Background: Autoimmune diseases can be caused by genes people inherit from their parents. The gene changes that cause these diseases have been well studied in people with European and Asian ancestors. But some diseases behave differently in people who are native to North and South America. Researchers want to know more about the gene changes and other factors that may cause autoimmune diseases among these people. This project will be based in Peru. Objective: To study how gene changes can lead to autoimmune diseases in people native to Peru. Eligibility: People aged 18 years and older with an autoimmune disease. These may include systemic lupus erythematosus; Sjogren disease; scleroderma; rheumatoid arthritis; seronegative spondylo-arthropathies; and systemic vasculitis. Family members and healthy volunteers are also needed. Design: Participants will have 2 clinic visits; these will be 2 weeks apart. The clinics will be in Lima, Iquitos, and other sites in Peru. Visit 1: Participants will have a physical exam. They will answer questions about their health risks and habits. They will provide blood and urine samples. Visit 2: Participants will provide a second blood sample and a stool sample. They will talk about the results of their first clinical exam with researchers. The cost of travel to and from the clinics will be provided. Participants will get $30 per visit and a snack.