PET Imaging of Phosphodiesterase-4 (PDE4) in Brain and Peripheral Organs of McCune-Albright Syndrome

Plain-language summary

Background: McCune-Albright Syndrome (MAS) is a disorder that affects the bones, skin, and some hormone-producing tissues. It is associated with a mutation in a gene. This gene affects enzymes in the brain and body. Researchers want to learn more about one of these enzymes, Phosphodiesterase 4 (PDE4), in people with MAS. Objective: To see if people with MAS have higher levels of PDE4 than people without MAS. Eligibility: People ages 18 and older who have MAS and participated in protocol 98-D-0145, Screening and Natural History of Patients with Polyostotic Fibrous Dysplasia and the McCune-Albright Syndrome. Healthy adult volunteers are also needed. Design: This study requires 1 to 4 outpatient visits to the NIH Clinical Center. Some visits may take place on the same day. Participants with MAS will be screened with medical history and physical exam. They will have blood and urine tests. Participants will have a magnetic resonance imaging scan. Participants will have a full body positron emission tomography (PET) scan. A small amount of a radioactive chemical, \[11C\](R)-rolipram, will be given through an intravenous tube. Participants will have a brain PET scan with \[11C\](R)-rolipram. For this, a thin plastic tube will also be put into an artery at their wrist or elbow crease area. For the scans, participants will lie on a bed that slides in and out of a scanner. They may wear a plastic mask to hold their head in place. They will have blood drawn. Participants with MAS will be interviewed about their thinking and mood. They may complete questionnaires about how they feel or think.

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