- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT06412315
7T Amygdala and Citalopram Study (7TAC)
The Effects of Citalopram on the Brain's Response to Faces
The goal of this study is to investigate how a common antidepressant citalopram (which increases the levels of the chemical messenger serotonin), affects how a key area of the brain involved in depression (the amygdala) responds to emotional information.
Healthy participants will undergo medical and psychiatric health screening, after which they will be assigned to receive either a single dose of citalopram (20mg) or placebo, and undergo brain scanning (7T fMRI) whilst viewing emotional faces. Since the scan uses high field strength, the investigators will be able to see effects of citalopram on different subfields within the amygdala which will help to understand how citalopram might be working.
Study Overview
Status
Intervention / Treatment
Detailed Description
Study Type
Enrollment (Estimated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Marieke AG Martens, DPhil
- Phone Number: +441865 618338
- Email: marieke.martens@psych.ox.ac.uk
Study Contact Backup
- Name: Catherine J Harmer, DPhil
- Phone Number: +441865 618326
- Email: catherine.harmer@psych.ox.ac.uk
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Adult
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Participant is willing and able to give informed consent for participation in the research
- Sufficiently fluent English to understand and complete the task
Exclusion Criteria:
- Participants with ferromagnetic objects in their bodies (e.g. metal implants, vessel clips, shrapnel injuries) or with implanted devices which may be damaged by the magnet (e.g. heart pacemakers)
- Any other MRI contraindication following MRI safety screening
- History or current significant psychiatric illness (like major depressive disorder)
- Current or past diagnosis of any significant personality disorder (e.g. borderline personality disorder) according to self-report
- Diagnosis of attention deficit hyperactive disorder or autistic spectrum disorder that impairs daily functioning, requires pharmacotherapy or in the opinion of the study medic would affect the scientific integrity of the study
- Currently or within last 3 months taking psychoactive medications (requires further discussion with researcher)
- Current or within the last 3 months use of medication that might interact with the effects of citalopram or affect the scientific integrity of the study
- Known contraindication to citalopram including: past allergic reaction to citalopram or any other medicines, diagnosis of a cardiovascular condition, glaucoma, type 1 or type 2 diabetes, diagnosis of epilepsy, previous diagnosis of angle-closure glaucoma, or current use of any other medication whose use interacts with citalopram (according to British National Formulary (BNF) guidance) e.g. associated with prolonged QT-interval
- Any other current or past medical conditions which in the opinion of the study medic may interfere with the safety of the participant or the scientific integrity of the study including epilepsy/seizures, brain injury, hepatic or renal disease, diabetes, severe gastro-intestinal problems, Central Nervous System (CNS) tumours, neurological conditions
- Clinically significant abnormal values for urine drug screen, pulse, and blood pressure measurement (in accordance with Best Practice Guidance 13: 'Non-invasive measurement of blood pressure'). A participant with a clinical abnormality or parameters outside the reference range for the population being studied may be included only if the Investigator considers that the finding is unlikely to introduce additional risk factors and will not interfere with the study procedures
- Current alcohol or substance misuse disorder
- Body Mass Index under 18 and over 30
- Pregnant or planning a pregnancy, or breast feeding
- Previously taken part in a study that used similar computer tasks (MRI faces task, emotional test battery) as those in the present study
- Participation in a study that involves the use of a psychoactive medication or brain stimulation within the last three months
- Use of recreational drugs (e.g. cannabis, cocaine, amphetamines) within last three months
- Smoking > 5 cigarettes per day, or vape a comparable amount (> 0.5ml / a quarter of a 2ml vape);
- Typically drinks > 6 caffeinated drinks per day (e.g. tea, coffee, coca cola, Red Bull)
- Participant is unlikely to comply with the clinical study protocol or is unsuitable for any other reason, in the opinion of the Investigator
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Placebo Comparator: Placebo
|
Participants will receive a single dose of placebo (sucrose).
Tablets encapsulated to aid blinding.
To take per oral once
|
Experimental: Citalopram
|
Participants will receive a single dose (20mg) citalopram.
Tablets encapsulated to aid blinding.
To take per oral once.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Neural measures: fMRI BOLD univariate analysis
Time Frame: 3 hours after dosing for approximately 1 hour
|
Blood-oxygen-level-dependent (BOLD) fMRI (region of interest (ROI) analysis amygdala) during the performance of an emotional faces task. Differential amygdala response to fearful and happy faces. Univariate analysis |
3 hours after dosing for approximately 1 hour
|
Neural measures: fMRI BOLD multivariate analysis
Time Frame: 3 hours after dosing for approximately 1 hour
|
Blood-oxygen-level-dependent (BOLD) fMRI (region of interest (ROI) analysis amygdala) during the performance of an emotional faces task. Amygdala response to fearful and happy faces. Multivariate pattern analysis. |
3 hours after dosing for approximately 1 hour
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Behavioural measures: Accuracy during gender discrimination task
Time Frame: 3 hours after dosing for approximately 1hour
|
Accuracy (% correct) of gender identification will be measured to ensure participant engagement throughout the task.
|
3 hours after dosing for approximately 1hour
|
Behavioural measures: Reaction times during gender discrimination task
Time Frame: 3 hours after dosing for approximately 1hour
|
Reaction times (ms) of gender identification will be measured to ensure participant engagement throughout the task.
|
3 hours after dosing for approximately 1hour
|
Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (Estimated)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Mental Disorders
- Depressive Disorder
- Mood Disorders
- Physiological Effects of Drugs
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Psychotropic Drugs
- Neurotransmitter Uptake Inhibitors
- Membrane Transport Modulators
- Serotonin Agents
- Antidepressive Agents
- Antidepressive Agents, Second-Generation
- Selective Serotonin Reuptake Inhibitors
- Citalopram
Other Study ID Numbers
- 7T_Amygdala_Citalopram
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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