Positron Emission Tomography Imaging of Dopamine Receptors Using the Tracer [11C]NNC-112
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|ClinicalTrials.gov Identifier: NCT00088517|
Recruitment Status : Completed
First Posted : July 28, 2004
Last Update Posted : March 4, 2008
|First Submitted Date ICMJE||July 27, 2004|
|First Posted Date ICMJE||July 28, 2004|
|Last Update Posted Date||March 4, 2008|
|Study Start Date ICMJE||July 2004|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE||Not Provided|
|Original Primary Outcome Measures ICMJE||Not Provided|
|Current Secondary Outcome Measures ICMJE||Not Provided|
|Original Secondary Outcome Measures ICMJE||Not Provided|
|Current Other Pre-specified Outcome Measures||Not Provided|
|Original Other Pre-specified Outcome Measures||Not Provided|
|Brief Title ICMJE||Positron Emission Tomography Imaging of Dopamine Receptors Using the Tracer [11C]NNC-112|
|Official Title ICMJE||Whole Body Study of [11C]NNC-112 PET Imaging of Dopamine D1 Receptors|
This study will investigate the use of [11C]NNC-112 in positron emission tomography (PET) scanning. PET is a technique that uses radioactive isotopes called tracers to provide images of the brain. Injected into the body, the isotopes lose their "radioactive strength" over time, sending out rays that can be picked up and "seen" by special detectors connected to a computer. The computer then makes a picture of the brain. This study will examine the distribution in the body of a new tracer called [11C]NNC-112.
Healthy normal volunteers between 18 and 70 years of age may be eligible for this study. Candidates are screened with a physical examination and blood and urine tests, including a urine drug screen. Women up to age 55 also have a pregnancy test.
Participants have a PET scan using the [11C]NNC-112 tracer. For this procedure, a catheter (small plastic tube) is placed into a vein in the subject's arm for injecting the tracer. Then, the subject lies on the scanner bed. After a preliminary "transmission scan," the tracer is injected, and PET scans are taken from the head to the upper thigh over a period of about 2 hours to show the distribution of radioactivity in the body. Blood pressure, breathing rate, and heart rate are checked before and after injection of the tracer, and blood and urine samples are collected after the PET scan.
Abnormalities in dopaminergic neurotransmission have been implicated in several neurodegenerative and psychiatric disorders, such as Parkinson's disease, schizophrenia, attention-deficit-hyperactivity disorder and drug dependence. Among the Dopamine (DA) receptors, D1 receptors are understood to be involved in the regulation of motor and cognitive activity by modulating DAergic function. Neuroreceptor imaging with Positron Emission Tomography (PET) and Single Photon Emission Computerized Tomography (SPECT) allows in vivo quantification of the density and distribution of D1 receptors in humans. Recently, a new and superior PET radioligand for in vivo quantification of D1 receptors in extrastriatal regions has been developed. [11C]NNC-112 is a D1 radiotracer with high specific to nonspecific binding, making it suitable for imaging low density D1 receptors in extrastriatal regions such as the neocortex. Several studies in humans have confirmed the potential of this radiotracer, however, to date, dosimetry studies of [11C]NNC-112 in humans have not been performed.
The specific objective of this protocol is to estimate radiation-absorbed doses of [11C]NNC-112 in human subjects. For this purpose, we propose to perform a kinetic whole body imaging study of [11C]NNC-112 in healthy human subjects. We hypothesize that the level of radiation-absorbed doses of [11C]NNC-112 in humans will be within limits, and consequently, we should be able to move to the next stage of our imaging research, where we will use this radioligand to measure the density and distribution of D1 receptors in Parkinson's disease.
|Study Type ICMJE||Interventional|
|Study Phase ICMJE||Phase 1|
|Study Design ICMJE||Primary Purpose: Treatment|
|Intervention ICMJE||Drug: [11C]NNC-112|
|Study Arms ICMJE||Not Provided|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Recruitment Status ICMJE||Completed|
|Original Enrollment ICMJE||Same as current|
|Study Completion Date ICMJE||March 2006|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
All subjects must be healthy and aged 18-70 years.
Current psychiatric disease, substance abuse or severe systemic disease based on history and physical exam
Laboratory tests with clinically significant abnormalities
More than moderate hypertension
Any prior participation in other research protocols within the past year that involve radiation, with the exception of plain radiography studies (i.e., chest x-rays).
Pregnancy and Breast Feeding
Positive HIV test
|Ages ICMJE||Child, Adult, Older Adult|
|Accepts Healthy Volunteers ICMJE||Yes|
|Contacts ICMJE||Contact information is only displayed when the study is recruiting subjects|
|Listed Location Countries ICMJE||United States|
|Removed Location Countries|
|NCT Number ICMJE||NCT00088517|
|Other Study ID Numbers ICMJE||040170
|Has Data Monitoring Committee||Not Provided|
|U.S. FDA-regulated Product||Not Provided|
|IPD Sharing Statement ICMJE||Not Provided|
|Current Responsible Party||Not Provided|
|Original Responsible Party||Same as current|
|Current Study Sponsor ICMJE||National Institute of Mental Health (NIMH)|
|Original Study Sponsor ICMJE||Same as current|
|Collaborators ICMJE||Not Provided|
|Investigators ICMJE||Not Provided|
|PRS Account||National Institutes of Health Clinical Center (CC)|
|Verification Date||March 2006|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP