Clinical Trials

Do you have severe asthma? Researchers in this study are trying to determine if a person's genetic makeup changes how a steroid used to treat asthma affects how well it works. You may be able to participate if you are between 18 and 50 years old. The study is taking place in Indianapolis, Indiana.

Are you an adult who has asthma, or are you willing to be a healthy volunteer? This study aims to test a new and less invasive way to look at the levels of a protein called GSNOR in people who have asthma. High levels of this protein can lead to inflammation (swelling) in the airways. Normally, doctors measure GSNOR levels with bronchoscopy (a tube inserted through your mouth into your airways). But this often requires you to be sedated. In the new approach being studied here, you will breathe in a chemical that your body makes, called GSNO. Researchers will look at how much of the chemical is broken down in your breath. This will tell them what your GSNOR levels are. They will compare the levels between people who have asthma and people who do not to see whether the test works. To participate in this study, you should be between 18 and 80 years old and either have been diagnosed with asthma for at least a year or not have asthma and not smoke. This study is located in Cleveland, Ohio.

Are you an adult with both asthma and obesity? This study is testing whether a medicine called L-citrulline can help treat asthma and improve lung function in people who have obesity. To participate in this study, you must be 18 to 65 years old and have asthma and obesity. This study takes place in Durham, North Carolina.

Do you have symptoms of a lung disease (such as long-term wet cough, bronchiectasis, or recurrent pneumonia) with no genetic diagnosis? This study aims to develop new ways to diagnose primary ciliary dyskinesia (PCD) or primary immune deficiency (PID), two conditions that can have similar symptoms. Researchers will combine information from genetic testing, lung imaging, and lung function tests to diagnose and tell the difference between these two conditions. Participants in this study must be 5 to 45 years old and must have symptoms of a serious lung disease but no diagnosis. This study is taking place at multiple locations in the United States and in Canada, including the NIH Clinical Center in Bethesda, Maryland.

The purpose of this study is to learn more about how the use of two different types of telemedicine (distance medical care) can address barriers to receiving comprehensive sickle cell care, and whether care can be improved.

Are you 15 to 40 years old and have severe sickle cell disease? This study is comparing long-term outcomes for patients who receive blood and bone marrow transplants and those who receive standard treatment with medicines. Participants also have an option of contributing blood samples to be stored for future research. Participants must be 15 to 40 years old and have severe sickle cell disease. This study is located in Madison, Wisconsin.

Do you or your child have sickle cell disease and also have an interest in contributing to long-term data collection? This study is monitoring patients and collecting biological samples from patients who have sickle cell disease to better understand long-term outcomes. Participants can be any age and must have sickle cell disease. This study is located in six sites in Illinois, Louisiana, North Carolina, and Tennessee.

Are you an adult with sickle cell disease? This study aims to determine whether monthly exchange blood transfusions (removing blood and replacing it with transfused red blood cells) can improve health and prevent or reduce the number of pain crises. To participate in this study, you must be at least 18 years old, have sickle cell disease, and have not been on a chronic exchange transfusion program for at least 2 months. This study is located in Pittsburgh, Pennsylvania.

Are you an adult who receives long-term red blood cell transfusion therapy for sickle cell disease? This 3-month study tests whether donated blood that is more than 30 days old leads to more infections in people with sickle cell disease than blood that is less than 10 days old. Some hospitals around the United States have requirements regarding the age of donor blood. This research aims to inform new evidence-based policies on the age and use of donor blood in people with sickle cell disease that rely on blood transfusions. To participate in this study, you must be between 16 and 45 years old, have sickle cell disease, and be receiving long-term red blood cell transfusion therapy. This study takes place in Atlanta, Georgia; Chapel Hill, North Carolina; and Milwaukee, Wisconsin.

Are you an adult with sickle cell disease who’s recently had a vaso-occlusive episode? This study investigates better ways for emergency departments (EDs) to manage vaso-occlusive episodes, or pain crises, in people with sickle cell disease. This study is incorporating “Individualized Pain Plans” into patients’ electronic health records to allow for faster and more accurate treatment in the ED. To participate in this study, you must be between the ages of 18 and 45 and have sickle cell disease. You must also have had at least one visit to a participating ED in the past 90 days due to pain from a vaso-occlusive episode and at least one visit at the study site sickle cell disease clinic within the past 12 months. This study takes place in multiple locations in the United States.