A Study of Neural Circuit Responses to Catechol-O-methyl Transferase (COMT) Inhibitors
Public ClinicalTrials.gov record NCT01158950. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
A Randomized, Double-Blind Study of Neural Circuit Responses to COMT Inhibitors
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
In this study, we seek to understand the effects of tolcapone, an FDA-approved COMT inhibitor, on reward choice and response inhibition, two measures we have previously shown to be altered in subjects with alcoholism. We now plan to test the hypothesis that COMT regulation of cortical dopamine levels is critical for regulation financial choices. Specifically, we propose that the lower levels of cortical dopamine present in individuals with the val158val COMT genotype reduces the inhibitory effect of frontal cortical areas on impulsive choice; an idea that extends previous hypotheses about the negative consequences of decreased prefrontal dopamine levels on inhibitory control. Moreover, this hypothesis suggests that inhibiting COMT may slow the degradation of dopamine and thereby decrease impulsivity.
Study identification
- NCT ID
- NCT01158950
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 26 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 18 Years to 50 Years
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Mar 2010 (Actual)
- Primary completion
- Dec 2018 (Actual)
- Completion
- Dec 2018 (Actual)
- Last update posted
- Nov 20, 2020
2010 – 2018
United States locations
- U.S. sites
- 2
- U.S. states
- 1
- U.S. cities
- 2
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| University of California, Berkeley | Berkeley | California | 94704 | — |
| UCSF: Ernest Gallo Clinic and Research Center | Emeryville | California | 94591 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT01158950, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Nov 20, 2020 · Synced Oct 15, 2026
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Open the official record
The complete public registry record, listed eligibility criteria, and available contact information for NCT01158950 live on ClinicalTrials.gov.