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Dopaminergic Effects of Adjunctive Aripiprazole on the Brain in Treatment-Resistant Depression

Primary Purpose

Major Depressive Disorder

Status

Completed

Phase

Not Applicable

Locations

United States

Study Type

Interventional

Intervention

Escitalopram

Aripiprazole

Placebo Capsule

Placebo Tablet

About this trial

This is an interventional other trial for Major Depressive Disorder focused on measuring Depression, Neuroimaging, Aripiprazole, Mood disorder, PET Scan, fMRI

Eligibility Criteria

18 Years - 55 Years (Adult)All SexesAccepts Healthy Volunteers

Treatment Group

Inclusion Criteria:

Subjects with known history of MDD verified using the Mini International Neuropsychiatric Interview and a Hamilton Depression Rating Scale 17-item score of at least 18
Subjects must have failed to respond to one previous adequate dose-duration trial of antidepressant therapy
Must complete the MRI screening tool and demonstrate ability to receive an MRI
For entry into the ARP augmentation phase the subject must be a non-responder to the escitalopram phase as demonstrated by a MADRS score at week 10, that is not reduced by greater than 50% from baseline.

Exclusion Criteria:

Subjects cannot be smokers
No significant history of anxiety disorder
Cannot be pregnant or lactating and sexually active women of childbearing potential must use a medically accepted means of contraception
The following DSM-IV diagnoses are excluded: Organic mental disorder; substance abuse/dependence, including alcohol, active within the last year; schizophrenia, paranoid or delusional disorders; other psychotic disorders; panic disorder; generalized anxiety disorder; obsessive-compulsive disorder, or post-traumatic stress disorder; bipolar disorder; bulimia nervosa; anorexia nervosa
Subjects with serious suicidal risks
Subjects who have taken any antidepressant medication other than escitalopram within 5 half lives, of the most recent antidepressant taken
Subjects involved in any other form of treatment for depression
Subjects who have demonstrated any previous inadequate antidepressant response to electroconvulsive therapy (ECT)
Subjects who have received ECT for the current depression episode
Subjects who have been hospitalized within 4 weeks of the study
Subjects who have received treatment with a monoaminoxidase inhibitor within 2 weeks of enrollment
Subjects with a known allergy, hypersensitivity, or previous unresponsiveness to aripiprazole or known intolerance to any study medications
Subjects with a history of participation in any investigational medication trial in the past month
A positive drug screen or substance use disorder in the past 12 months
History of any thyroid pathology
History of serotonin syndrome or neuroleptic malignant syndrome
History of seizure disorder
Subjects who have participated in a trial using PET scans in the past 12 months and in any trial in the past 30 days.

Control Group

Inclusion Criteria:

Ages 18-55 matched to a study subject
Must be a healthy subject with no significant medical history
Must complete the MRI screening tool and demonstrate ability to receive an MRI

Exclusion Criteria:

Cannot be a smoker
Cannot be pregnant or lactating and sexually active women of childbearing potential must use a medically accepted means of contraception
Any DSM-IV or II diagnosis as assessed by the MINI
Subjects with a positive drug screen or substance use disorder in the past 12 months

Sites / Locations

Washington University in St. Louis, School of Medicine

Arms of the Study

Arm 1

Arm 2

Arm Type

Active Comparator

No Intervention

Arm Label

Depressed Participants

Control Participants

Arm Description

Subjects with treatment-resistant depression (TRD) will be administered the Hamilton Depression Rating Scale (HAM-D 17) for entry and will receive escitalopram combined with an adjunctive placebo capsule for 8 weeks. Subjects who fail to respond will continue to receive escitalopram and additionally change to receive a placebo tablet resembling the active augmentation agent Aripiprazole (ARP) for 2 weeks. Subjects who fail to respond to escitalopram after the 2 phase placebo treatment will enter the ARP augmentation phase of the study and will receive escitalopram augmentation with ARP. Subjects will have 3 neuroimaging scans: F-DOPA PET, raclopride PET, and functional MRI conducted after 10 weeks of treatment and repeated after 6 weeks of ARP treatment.

Non-depressed, age- and sex-matched subjects without a DSM-IV Axis I diagnosis will serve as controls. They will not receive antidepressant, ARP, or any drug augmentation and will be used as quality control to compare the pre-ARP and post-ARP treatment brain images.

Outcomes

Primary Outcome Measures

Fluorodopa Uptake Values in Brain Images of Aripiprazole Augmentation Responders

A ratio of the image derived radioactivity concentration and the whole body concentration of the injected radioactivity specifically in a cluster within the right medial caudate (see data below).

Secondary Outcome Measures

Depression Symptom Change on The Montgomery-Åsberg Depression Rating (MADRS) Scale Between ARP Responders and Non-responders.

Montgomery-Åsberg Depression Rating (MADRS) Scale scores compared between the 6 week Aripiprazole augmentation groups (responds vs. non-responders). Total range of the MADRS is 0 to 60, with a score of greater than 34 indicating severe depression, 20-34 indicating moderate depression, 7-19 mild depression, and 0-6 normal or absent of symptoms.

Full Information

NCT ID

NCT00953745

First Posted

August 4, 2009

Last Updated

April 17, 2018

Sponsor

Washington University School of Medicine

Collaborators

Bristol-Myers Squibb

1. Study Identification

Unique Protocol Identification Number

NCT00953745

Brief Title

Dopaminergic Effects of Adjunctive Aripiprazole on the Brain in Treatment-Resistant Depression

Official Title

Dopaminergic Effects of Adjunctive Aripiprazole on the Brain in Treatment-Resistant Depression: A Raclopride/F-DOPA Positron Emission Tomography and Functional MRI Study

Study Type

Interventional

2. Study Status

Record Verification Date

April 2018

Overall Recruitment Status

Completed

Study Start Date

May 2009 (undefined)

Primary Completion Date

June 2012 (Actual)

Study Completion Date

December 2012 (Actual)

3. Sponsor/Collaborators

Responsible Party, by Official Title

Sponsor

Name of the Sponsor

Washington University School of Medicine

Collaborators

Bristol-Myers Squibb

4. Oversight

Data Monitoring Committee

5. Study Description

Brief Summary

Aripiprazole has been approved by the FDA for augmenting ineffective/partially effective oral antidepressant therapy in patients suffering from major depression. The mechanism by which this augmentation is achieved is not known. This study has been designed to test the hypothesis that the primary mechanism of action of aripiprazole (ARP) antidepressant augmentation is through the dopaminergic pathway. Two positron emission tomography (PET) scan procedures and a functional magnetic resonance imaging (fMRI) scan will be used to test this hypothesis.

Detailed Description

This study is designed to help understand the mechanism of action of ARP in major depressive disorder (MDD) augmentation. Subjects will undergo exposure to an existing antidepressant (Lexapro 10-20mg) for 10 weeks; subjects failing to completely respond to the monotherapy antidepressant treatment will receive augmentation with ARP for six weeks. Two placebo phases are included in which the subjects will receive one placebo along with the Lexapro for the first 6 weeks and a second placebo along with Lexapro for the next two weeks. A baseline brain imaging series (MRI and 2 PET/CT scans) will be obtained at week 10, prior to starting the aripiprazole, on subjects not responding to Lexapro. A second series of images will be obtained at the end of the six weeks of ARP augmentation. The neuroimaging will consist of fMRI, a raclopride PET scan, and a fluoro-dopa PET scan. Ten normal control subjects will not receive any treatment. They will be age and gender matched to study subjects and undergo one set of scans (fMRI,raclopride and FOPA PET scans) to use as comparison group for quality control on a non-depressed population and not for data analysis.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study

Major Depressive Disorder

Keywords

Depression, Neuroimaging, Aripiprazole, Mood disorder, PET Scan, fMRI

7. Study Design

Primary Purpose

Other

Study Phase

Not Applicable

Interventional Study Model

Parallel Assignment

Model Description

This study is designed to help understand the mechanism of action of aripiprazole in MDD augmentation. Subjects will undergo exposure to en an existing antidepressant (Lexapro 10-20mg) for 10 weeks; subjects failing to completely respond to the monotherapy antidepressant treatment will receive augmentation with aripiprazole for six weeks. We have included two placebo phases to the study in which the subjects received one placebo along with the Lexapro for the first 6 weeks and a second placebo along with Lexapro for the next two weeks (weeks 7 and 8). This double placebo design is to ensure that subjects receiving aripiprazole augmentation have a legitimate response (non-placebo) to the aripiprazole augmentation. Since the N of this study is small and a small % of patients with placebo response could skew the imaging data significantly, the use of a double placebo prior to the start of the true aripiprazole augmentation should reduce or eliminate a placebo response.

Masking

Participant

Allocation

Non-Randomized

Enrollment

43 (Actual)

8. Arms, Groups, and Interventions

Arm Title

Depressed Participants

Arm Type

Active Comparator

Arm Description

Arm Title

Control Participants

Arm Type

No Intervention

Arm Description

Intervention Type

Drug

Intervention Name(s)

Escitalopram

Other Intervention Name(s)

Lexapro

Intervention Description

All subjects will begin on escitalopram and placebo for 8 weeks

Intervention Type

Drug

Intervention Name(s)

Aripiprazole

Other Intervention Name(s)

Abilify

Intervention Description

Subjects who fail to respond to Escitalopram will continue on Escitalopram and augment with active Aripiprazole.

Intervention Type

Drug

Intervention Name(s)

Placebo Capsule

Intervention Description

All subjects will begin on escitalopram and placebo capsule for 8 weeks.

Intervention Type

Drug

Intervention Name(s)

Placebo Tablet

Intervention Description

After 8 weeks, subjects will be given a 2 week supply of escitalopram and placebo tablet.

Primary Outcome Measure Information:

Title

Fluorodopa Uptake Values in Brain Images of Aripiprazole Augmentation Responders

Description

A ratio of the image derived radioactivity concentration and the whole body concentration of the injected radioactivity specifically in a cluster within the right medial caudate (see data below).

Time Frame

Week 10 and Week 16 (6 weeks of combined therapy)

Secondary Outcome Measure Information:

Title

Depression Symptom Change on The Montgomery-Åsberg Depression Rating (MADRS) Scale Between ARP Responders and Non-responders.

Description

Time Frame

Week 10 and Week 16 (6 weeks of combined therapy)

10. Eligibility

Sex

All

Minimum Age & Unit of Time

18 Years

Maximum Age & Unit of Time

55 Years

Accepts Healthy Volunteers

Eligibility Criteria

Treatment Group Inclusion Criteria: Subjects with known history of MDD verified using the Mini International Neuropsychiatric Interview and a Hamilton Depression Rating Scale 17-item score of at least 18 Subjects must have failed to respond to one previous adequate dose-duration trial of antidepressant therapy Must complete the MRI screening tool and demonstrate ability to receive an MRI For entry into the ARP augmentation phase the subject must be a non-responder to the escitalopram phase as demonstrated by a MADRS score at week 10, that is not reduced by greater than 50% from baseline. Exclusion Criteria: Subjects cannot be smokers No significant history of anxiety disorder Cannot be pregnant or lactating and sexually active women of childbearing potential must use a medically accepted means of contraception The following DSM-IV diagnoses are excluded: Organic mental disorder; substance abuse/dependence, including alcohol, active within the last year; schizophrenia, paranoid or delusional disorders; other psychotic disorders; panic disorder; generalized anxiety disorder; obsessive-compulsive disorder, or post-traumatic stress disorder; bipolar disorder; bulimia nervosa; anorexia nervosa Subjects with serious suicidal risks Subjects who have taken any antidepressant medication other than escitalopram within 5 half lives, of the most recent antidepressant taken Subjects involved in any other form of treatment for depression Subjects who have demonstrated any previous inadequate antidepressant response to electroconvulsive therapy (ECT) Subjects who have received ECT for the current depression episode Subjects who have been hospitalized within 4 weeks of the study Subjects who have received treatment with a monoaminoxidase inhibitor within 2 weeks of enrollment Subjects with a known allergy, hypersensitivity, or previous unresponsiveness to aripiprazole or known intolerance to any study medications Subjects with a history of participation in any investigational medication trial in the past month A positive drug screen or substance use disorder in the past 12 months History of any thyroid pathology History of serotonin syndrome or neuroleptic malignant syndrome History of seizure disorder Subjects who have participated in a trial using PET scans in the past 12 months and in any trial in the past 30 days. Control Group Inclusion Criteria: Ages 18-55 matched to a study subject Must be a healthy subject with no significant medical history Must complete the MRI screening tool and demonstrate ability to receive an MRI Exclusion Criteria: Cannot be a smoker Cannot be pregnant or lactating and sexually active women of childbearing potential must use a medically accepted means of contraception Any DSM-IV or II diagnosis as assessed by the MINI Subjects with a positive drug screen or substance use disorder in the past 12 months

Overall Study Officials:

First Name & Middle Initial & Last Name & Degree

Charles R Conway, MD

Organizational Affiliation

Washington University School of Medicine

Official's Role

Principal Investigator

Facility Information:

Facility Name

Washington University in St. Louis, School of Medicine

City

Saint Louis

State/Province

Missouri

ZIP/Postal Code

63110

Country

United States

12. IPD Sharing Statement

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Dopaminergic Effects of Adjunctive Aripiprazole on the Brain in Treatment-Resistant Depression

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