- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03436173
OxSYPan: Oxford Study With Young People on Antidepressants (OxSYPan)
Investigating the Effects of the Antidepressant Fluoxetine on the Emotional Processing of Young People With Depression - a Double Blind, Placebo-controlled Design fMRI Study
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Depression is common in adolescence and is associated with a high risk of suicide. Clinically, the presentation of depression in young people is largely similar to the symptoms seen in adulthood, although depressed youth may exhibit increased irritability rather than (or in addition to) low mood. Therefore, irritability is included as a cardinal symptom in the diagnosis of Major Depressive Disorder (MDD) among children and adolescents but not adults (American Psychiatric Association, 2013).
Fluoxetine is the antidepressant with the most favourable benefit:risk ratio profile to treat adolescent depression, and is the only medication approved for use to treat this disorder in the United Kingdom (UK). In the United States (US), fluoxetine is also the drug of choice, together with escitalopram. However, our current understanding of the mechanisms underlying antidepressant action in adolescents and young people is poor, despite the pressing need to explain the complex patterns of clinical response to pharmacotherapy in this group.
In this randomised, placebo-controlled experimental medicine study, the investigators propose to use fMRI to investigate the early effects of fluoxetine in a sample of depressed adolescents who have been prescribed fluoxetine by their psychiatrist for the treatment of depression. Immediately after being referred to the study team, participants will be randomised to take their first dose of either fluoxetine or placebo within the study, and 6 hours later, they will undergo a neuroimaging scan.
Previous research from our group showed that a single dose of fluoxetine reduced the accuracy to detect angry facial expressions in a group of young healthy volunteers, aged 18 to 21 (Capitão et al., 2015). Given the key role of anger in the clinical presentation of adolescent depression, the reduction in anger perception following fluoxetine highlights a potential mechanism through which this antidepressant drug may exert its clinical action. However, this hypothesis remains to be investigated in depressed adolescents.
This study therefore proposes to investigate the acute effects of fluoxetine vs. placebo on emotional neural processing, specifically in response to angry faces, in a sample of adolescents with MDD. A secondary aim is to investigate the effects of fluoxetine on emotional regulation, as well as on resting-state functional connectivity.
To the extent of the investigators' knowledge, this is the first study to explore the acute neural effects of fluoxetine in depressed adolescents. This design is thought to be of high value as patients will be referred to the study immediately after being prescribed fluoxetine, therefore allowing the investigators to scan them on the day that they take their first dose of 10 mg fluoxetine or placebo, administered within the study. Patients will then start their antidepressant treatment as prescribed and managed by their treating psychiatrist. This unique time window for testing allows the investigation of the effects of fluoxetine using a placebo control, and without the ethical concerns associated with long-term antidepressant drug studies. This single dose design also enables the characterisation of the effects of fluoxetine at a time where changes in mood are not yet apparent. Indeed, the few neuroimaging studies conducted to date with depressed adolescents are limited by the absence of a placebo control and the measurement of neural changes after relatively prolonged treatments (8 weeks). Concurrent changes in symptoms make it difficult to determine whether fluoxetine has a direct effect on relevant neural regions or whether the antidepressant-induced changes in activity are an indirect consequence of mood improvement. The current study design overcomes these constraints.
The knowledge attained from this study will hopefully help increase our understanding of the early mechanisms underlying fluoxetine use in depressed adolescents.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Current episode of depression with or without comorbid anxiety and in need of antidepressant medication (as assessed by the Adolescent Psychiatrist);
- Participant and parent/legal guardian (for participants younger than 16) are willing and able to give informed consent for participation in the study;
- Male or female, aged 13-18;
- Sufficiently fluent in English to understand the task and instructions.
Exclusion Criteria:
- Current or past psychosis or mania;
- Current substance misuse;
- Psychotropic medication usage within the past 6 weeks;
- Contraindication to fMRI (e.g. metal in body, claustrophobia, pregnancy, etc);
- Risk of waiting 5-7 days before the initiation of medication assessed as posing serious risk (as assessed by the Adolescent Psychiatrist).
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Other
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Quadruple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Fluoxetine
Fluoxetine 10 mg/2.5 ml
|
Fluoxetine 10 mg/2.5 ml mixed with water
Other Names:
|
Placebo Comparator: Placebo
Peppermint syrup measured to equivalent volume
|
Liquid peppermint syrup measured to the equivalent volume and mixed with water
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Neural activity (BOLD response) in response to angry faces
Time Frame: 6 hours post-intervention
|
fMRI data collected during a faces task involving angry, happy and fearful faces
|
6 hours post-intervention
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Neural activity (BOLD response) in task measuring emotional regulation
Time Frame: 6 hours post-intervention
|
fMRI data collected during an emotional regulation task
|
6 hours post-intervention
|
Resting-state functional connectivity
Time Frame: 6 hours post-intervention
|
fMRI data collected during resting-state scan
|
6 hours post-intervention
|
Collaborators and Investigators
Sponsor
Publications and helpful links
General Publications
- Capitao LP, Murphy SE, Browning M, Cowen PJ, Harmer CJ. Acute fluoxetine modulates emotional processing in young adult volunteers. Psychol Med. 2015 Aug;45(11):2295-308. doi: 10.1017/S0033291715000240. Epub 2015 Apr 13.
- American Psychiatric Association (2013). Diagnostic and Statistical Manual of Mental Disorders, 5th edn: DSM-5. American Psychiatric Association: Arlington, VA.
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
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
Additional Relevant MeSH Terms
- Behavioral Symptoms
- Depression
- Physiological Effects of Drugs
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Enzyme Inhibitors
- Psychotropic Drugs
- Serotonin Uptake Inhibitors
- Neurotransmitter Uptake Inhibitors
- Membrane Transport Modulators
- Serotonin Agents
- Antidepressive Agents
- Cytochrome P-450 Enzyme Inhibitors
- Antidepressive Agents, Second-Generation
- Cytochrome P-450 CYP2D6 Inhibitors
- Fluoxetine
Other Study ID Numbers
- 12/SC/0030
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
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.
Clinical Trials on Depression
-
ProgenaBiomeRecruitingDepression | Depression, Postpartum | Depression, Anxiety | Depression Moderate | Depression Severe | Clinical Depression | Depression in Remission | Depression, Endogenous | Depression ChronicUnited States
-
Washington University School of MedicineCompletedTreatment Resistant Depression | Late Life Depression | Geriatric Depression | Refractory Depression | Therapy-Resistant DepressionUnited States, Canada
-
Kintsugi Mindful Wellness, Inc.Sonar Strategies; Vituity PsychiatryRecruitingDepression | Depression Moderate | Depression Severe | Depression MildUnited States
-
University of California, San FranciscoRecruitingDepression Moderate | Depression Mild | Depression, TeenUnited States
-
University GhentUniversiteit Antwerpen; Janssen-Cilag Ltd.RecruitingDepression Moderate | Depression Severe | Depression MildBelgium
-
Baylor College of MedicineUniversity of TexasRecruitingDepression | Depression Moderate | Depression Severe | Suicide and Self-harm | Depression in Adolescence | Depression MildUnited States
-
University of Cape TownNational Institute of Mental Health (NIMH)CompletedPostpartum Depression | Clinical Depression | Moderate DepressionSouth Africa
-
Washington University School of MedicinePatient-Centered Outcomes Research Institute; National Institute of Mental...CompletedMajor Depressive Disorder | Treatment Resistant Depression | Treatment-Refractory Depression | Late Life Depression | Geriatric DepressionUnited States, Canada
-
Gerbera Therapeutics, Inc.Not yet recruitingPostpartum Depression | Depression, Postpartum | Postnatal Depression | Post-partum Depression | Post-Natal DepressionUnited States
-
Lawson Health Research InstituteTerminated
Clinical Trials on Fluoxetine
-
Yale UniversityNational Institute of Mental Health (NIMH)RecruitingObsessive-Compulsive DisorderUnited States
-
Chen QianRecruiting
-
Nanfang Hospital, Southern Medical UniversityRecruiting
-
Fundació Institut de Recerca de l'Hospital de la...Terminated
-
Centre Hospitalier St AnneTerminated
-
Teva Pharmaceuticals USACompleted
-
Teva Pharmaceuticals USACompleted
-
University of Sao PauloNovartis; Fundação de Amparo à Pesquisa do Estado de São Paulo; Conselho Nacional...CompletedObsessive Compulsive DisorderBrazil