Imaging of Brain Receptors Using (11C)mGlu1

Summary

Background: \- (11C)mGlu1 is a new drug that helps to show where a protein, mGluR1, is found in the brain. The drug contains a small amount of radioactivity that can be detected by imaging studies like positron emission tomography (PET) scans. By looking at the mGluR1 receptors, researchers hope to better understand how they are involved in general health, brain disorders, and addiction. Objectives: * To test how (11C)mGlu1 is distributed in the brain and body. * To measure how mGluR1 receptors display (11C)mGlu1 during imaging studies. Eligibility: \- Healthy volunteers between 18 and 50 years of age. Design: * Participants will be screened with a medical history, physical exam, and blood and urine tests. This study requires four visits to the NIH Clinical Center. * Participants will have an initial evaluation, a magnetic resonance imaging (MRI) scan, a PET scan, and a final blood sample after the PET scan, all at different visits. * The MRI and PET scans will focus on the brain. Participants will receive (11C)mGlu1, and have scans to see how it shows up in the brain. * Some participants will have whole body imaging studies to see how (11C)mGlu1 shows up in the body.

Timeline

Start

2011-07-29

Primary completion

2012-11-27

Completion

2012-11-27

Publications

• Background Kunishima N, Shimada Y, Tsuji Y, Sato T, Yamamoto M, Kumasaka T, Nakanishi S, Jingami H, Morikawa K. Structural basis of glutamate recognition by a dimeric metabotropic glutamate receptor. Nature. 2000 Oct 26;407(6807):971-7. doi: 10.1038/35039564.
• Background Conn PJ, Pin JP. Pharmacology and functions of metabotropic glutamate receptors. Annu Rev Pharmacol Toxicol. 1997;37:205-37. doi: 10.1146/annurev.pharmtox.37.1.205.
• Background Spooren W, Ballard T, Gasparini F, Amalric M, Mutel V, Schreiber R. Insight into the function of Group I and Group II metabotropic glutamate (mGlu) receptors: behavioural characterization and implications for the treatment of CNS disorders. Behav Pharmacol. 2003 Jul;14(4):257-77. doi: 10.1097/01.fbp.0000081783.35927.8f.

Drugs

Indications

No indication recorded.