PET Whole Body Distribution Studies Using [11C]CUMI
|First Received Date ICMJE||May 27, 2010|
|Last Updated Date||April 13, 2012|
|Start Date ICMJE||April 2010|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures ICMJE||Not Provided|
|Original Primary Outcome Measures ICMJE||Not Provided|
|Change History||Complete list of historical versions of study NCT01132872 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures ICMJE||Not Provided|
|Original Secondary Outcome Measures ICMJE||Not Provided|
|Current Other Outcome Measures ICMJE||Not Provided|
|Original Other Outcome Measures ICMJE||Not Provided|
|Brief Title ICMJE||PET Whole Body Distribution Studies Using [11C]CUMI|
|Official Title ICMJE||PET Whole Body Distribution Studies Using the 5-HT1A Agonist, [11C]CUMI|
- To determine the usefulness of [11C]CUMI as a method of studying serotonin receptors in the brain.
- Healthy individuals between 18 and 65 who have no history of psychiatric illness.
Eighteen million people in the United States are currently suffering from Major Depressive Disorder, which is characterized by episodes of low mood, poor self attitude and poor vitality. Of those suffering from Major Depressive Disorder (MDD), only one third completely improve, but even among these cases, there is a waiting period of several weeks or more during which antidepressants take effect. Our inability to adequately treat MDD is evident in its being ranked number one in Disability Adjusted Life Years (DALY) among persons aged 15-44. Given this profound burden, improving our understanding of the molecular basis of MDD is of utmost importance in the development of novel antidepressant medications.
Serotoninergic neurotransmission is implicated in MDD, as demonstrated by the relative success of selective serotonin reuptake inhibitors (SSRIs). SSRIs block the reuptake of serotonin through the serotonin transporter, which then increases serotonin at the synaptic cleft. Serotonin then binds to 5-HT(1A) receptors, which are G-protein coupled receptors that are present both presynaptically and postsynaptically. Presynaptically, these receptors act as autoinhibitory receptors, triggering decreased firing rates and decreased serotonin release. This autoinhibitory mechanism is believed to be the reason why patients experience a delay in symptomatic improvement after initiation of SSRIs. Serotonin binding to postsynaptic receptors mediates symptomatic improvement of depression. Multiple positron emission tomography (PET) studies on 5-HT(1A) have been published. However, none of these studies use 5-HT(1A) agonists, which are specific for the high affinity, G-protein coupled and active state of the 5-HT(1A) receptor. We would therefore like to establish the use of the 5-HT(1A) radiolabelled agonist, [(11)C]CUMI, here at NIH.
The purpose of this study is to perform whole body PET studies in healthy volunteers in order to estimate radiation absorbed doses for [(11)C]CUMI. Future experiments will include studies on Major Depressive Disorder.
|Study Type ICMJE||Observational|
|Study Design ICMJE||Time Perspective: Prospective|
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Intervention ICMJE||Not Provided|
|Study Group/Cohort (s)||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|
|Completion Date||April 2012|
|Primary Completion Date||Not Provided|
|Eligibility Criteria ICMJE||
|Ages||18 Years to 65 Years|
|Accepts Healthy Volunteers||No|
|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||NCT01132872|
|Other Study ID Numbers ICMJE||100110, 10-M-0110|
|Has Data Monitoring Committee||Not Provided|
|Responsible Party||Not Provided|
|Study Sponsor ICMJE||National Institute of Mental Health (NIMH)|
|Collaborators ICMJE||Not Provided|
|Information Provided By||National Institutes of Health Clinical Center (CC)|
|Verification Date||April 2012|
ICMJE Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP