NCT01359852

A Study of [11C]JNJ-42491293, a Possible PET Ligand for the mGlu2 Receptor, in Healthy Adult Volunteers

An Open-Label Study to Investigate the Dosimetry of the Positron Emission Tomography Ligand for the Metabotropic Glutamate Receptor-2 (mGlu2R), [11C]JNJ-42491293, and Displacement by the mGlu2R Positive Allosteric Modulator JNJ-40411813 in Healthy Male Subjects

• Status: Completed
• Phase: Phase 1
• Study type: Interventional
• Enrollment: 20 (actual)
• Sponsor: Johnson & Johnson Pharmaceutical Research & Development, L.L.C. · Industry
• Sex: Male
• Age: 18 Years – 45 Years
• Healthy volunteers: Accepted

Summary

The purpose of this study is to evaluate \[11C\] JNJ-42491293 as a PET ligand in healthy adult volunteers.

Detailed description

This is an open-label (volunteers will know the identity of assigned treatment) study in healthy adult volunteers and will consist of 4 consecutive parts, A, B, C, and D. Advancement to parts B, C, and D will occur only if the objectives of the preceding parts are met. Healthy adult volunteers will be recruited for each part of the study. This will be the first study in which 42491293 will be given to healthy adult volunteers. Part A will investigate the measurement of radiation (referred to as radiation dosimetry) of 42491293. Part B will measure the regional brain kinetics (activity) and binding properties of 42491293. Part C will assess the dose dependent blocking of 42491293 by 40411813 in brain tissues following single oral doses of 40411813. Part D will assess the 'duration of occupancy' of the metabotropic glutamate receptor-2 (mGluR2) positive allosteric modulator (PAM) site in the brain by 40411813 compared to peripheral clearance. In this study, 42491293 will be radio-labeled and evaluated as a potential positron emission tomography (PET) ligand for use in imaging studies of the brain to detect binding of 40411813, a compound being developed for treating patients with psychiatric conditions such as schizophrenia and anxiety disorders. In Parts A,B,C, and D, \[11C\] JNJ-42491293 (300 to 370 MBq) will be dosed as an i.v. bolus injection. During Part C and D, JNJ-40411813 (up to 500mg) will be administered orally (by mouth) 1.5 to 3 hours prior to scheduled PET scans.

Conditions

• Healthy

Interventions

Type	Name	Description
DRUG	[11C] JNJ-42491293	Part B:\[11C\] JNJ-42491293 (300 to 370 MBq) will be dosed as an i.v. bolus injection, have a 90 minute PET scan and have arterial and venous blood sampling.
DRUG	[11C] JNJ-42491293 + JNJ-40411813	Part C:\[11C\] JNJ-42491293 (300 to 370 MBq) will be dosed as an i.v.bolus injection. Volunteers will be pre-treated with JNJ-40411813 between 1.5 to 3 hours prior to the second and prior to the third PET scan
DRUG	[11C] JNJ-42491293 + JNJ-40411813	Part D:\[11C\] JNJ-42491293 (300 to 370 MBq) will be dosed as an i.v. bolus injection. Volunteers will be treated with a single dose of up to 500 mg JNJ-40411813 prior to the second scan and will have a third scan at least 2 hours later to evaluate the rate of clearance of JNJ-40411813 from the brain
DRUG	[11C] JNJ-42491293	Part A: \[11C\] JNJ-42491293 (300 to 370 MBq) will be dosed as an i.v. bolus injection and have a 120 minute PET scan.

Timeline

• Start date: 2010-12-01
• Primary completion: 2011-07-01
• Completion: 2011-07-01
• First posted: 2011-05-25
• Last updated: 2011-07-22