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Discover 23,284 clinical trials near Maryland. Find research studies in your area.
Showing 10441-10460 of 23,284 trials
NCT03707587
Background: Programmed cell death protein 1 (PD-L1) is a protein on the surface of cells. It regulates if a cell can be killed by immune system cells. It is thought to be able to affect the immune system response to diseased cells like those infected with a virus. The molecule M7824 interferes with the activity of PD-L1. It could help the immune system kill cells infected with a virus . Since recurrent respiratory papillomatosis is caused by a virus infection, this molecule could help. Objective: To see if M7824 works in treating recurrent respiratory papillomatosis. Eligibility: Adults ages 18 years or older with recurrent respiratory papillomatosis Design: Participants will be screened with: Medical history Physical exam Blood and pregnancy tests Endoscopy procedure in clinic. A small tube with a camera will look at the inside of the nose, throat, larynx, and upper windpipe. Some participants will also be screened with a chest scan. At the start of the study, participants will: Have a sedated endoscopy procedure where biopsies will be taken. Have blood tests. Have apheresis. Blood will be collected by a tube in an arm vein. A machine will remove white blood cells. The rest of the blood will be returned into an arm vein. Fill out a voice questionnaire. Participants will get the study molecule into a vein over about 1 hour. They will get it every other week for up to 12 weeks. Participants will repeat screening and starting procedures throughout the study. They will also review side effects and any medicine they are taking. When they are done with the study treatment, participants will be evaluated by repeating the study procedures. They may be evaluated periodically until their disease progresses.
NCT01851434
Background: \- Optic neuritis often is a symptom of multiple sclerosis (MS). Many people who experience optic neuritis are later diagnosed with MS. MS disease activity seen on magnetic resonance imaging (MRI) scans is often greater than that seen in tests given during regular doctor's visits. Even though MRI is a helpful tool for studying optic neuritis and MS, more information is needed on how MS symptoms show up on MRI scans. Researchers want to use MRI scans to track changes in the optic nerve after an optic neuritis episode. This approach will help them study the relationship between optic neuritis and MS. Objectives: \- To collect more information about the relationship between optic neuritis and multiple sclerosis. Eligibility: * Individuals between 18 and 50 years of age who have new optic neuritis. * Individuals between 18 and 50 years of age who have new symptoms of MS other than optic neuritis. * Healthy volunteers between 18 and 50 years of age. Design: * Participants will be screened with a physical exam and medical history. They may provide blood or urine samples. * Participants with optic neuritis or other MS symptoms will have a baseline study visit. They will have a physical exam and full eye exam. To look for signs of MS, they will have evoked potential tests to see how the body responds to stimulation. They will also have an MRI scan to study any changes in the brain and optic nerves. * After the first visit, participants will have steroid treatment for 5 days for the optic neuritis. * Additional study visits will be given 1, 3, 6, 9, and 12 months after the baseline visit. The tests from the first visit, including the MRI scans, will be repeated at these visits. * Healthy volunteers will have a baseline study visit. They will have a physical exam and full eye exam. They will have evoked potential tests to see how the body responds to stimulation. They will also have an MRI scan to study any changes in the brain and optic nerves. * Healthy volunteers will have additional study visits 2 and 11 months after the baseline visit. The tests from the first visit, including the MRI scans, will be repeated at these visits.