Clinical trial NCT00205933: Behavioral Processes Underlying Reward Processing in Depression
Official title: Behavioral Processes Underlying Reward Processing in Depression
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Major Depressive Disorder
Bipolar Disorder
Keywords: Depression
Bipolar Disorder
Reward Processing
Lead sponsor: Affective Neuroscience Laboratory
Sponsor class: OTHER
Collaborators: name: Massachusetts General Hospital
First posted: 2005-09-21
Enrollment: 78
Sex: ALL
Minimum age (years): 18
Maximum age (years): 64
Standard ages: ADULT
Accepts healthy volunteers: yes
Observational model: COHORT
Time perspective: CROSS_SECTIONAL
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Control participants, Participants with MDD, Participants with Bipolar Disorder

Brief summary: The purpose of this project is to use behavioral techniques to investigate emotional processing in subjects with major depression and healthy comparison subjects.

Detailed description: A promising strategy for parsing the heterogeneity of Major Depressive Disorder is to identify phenotypes characterized by reliable functional abnormalities. Anhedonia, the lack of reactivity to pleasurable stimuli, is considered a trait marker for depression. Using an objective behavioral task this project aims to investigate hedonic capacity in subjects meeting a DSM-IV diagnosis of Major Depressive Disorder.

Eligibility criteria: Inclusion Criteria:

Depressed participants:

* Right-handed
* DSM-IV diagnosis of MDD
* Score of at least 17 on the 21-item HAM-D scale
* Absence of any psychotropic medications for at least 2 weeks (6 months for dopaminergic drugs (including methylphenidate), 6 weeks for fluoxetine, and 4 weeks for neuroleptics and benzodiazepines because of longer half-lives.)
* No current or past history of MDD with psychotic features
* Absence of any other Axis I or Axis II diagnosis (Including bipolar disorder and current or lifetime history of alcohol or substance abuse or dependence.) Particularly, subjects with a history of alcoholism and substance abuse will be excluded, since dopaminergic alterations have been reported in these conditions. Exclusion of patients with comorbid Axis I or Axis II diagnoses will be necessary as evidence exists of alteration in dopamine receptor density in detached personality and social phobia. The alteration of dopamine in the brain may in turn alter behavior.
* Absence of significant medical conditions
* Absence of ECT in the previous 6 months
* Ability to provide informed consent/authorization

Bipolar participants:

* Both genders and all ethnic origins
* Age between 18 and 64
* Right-handed
* DSM-IV diagnosis of Bipolar Disorder I or II
* Score of at least 17 on the 21-item Hamilton Depression Rating Scale (HAM-D)
* Absence of any psychotropic medications for at least 2 weeks (6 months for dopaminergic drugs (including methylphenidate), 6 weeks for fluoxetine, and 4 weeks for neuroleptics and benzodiazepines because of longer half-lives.)
* No current or past history of MDD with psychotic features
* Absence of any other Axis I or Axis II diagnosis (Including current or lifetime history of alcohol or substance abuse or dependence.) Particularly, subjects with a history of alcoholism and substance abuse will be excluded.
* Absence of significant medical conditions
* Absence of ECT in the previous 6 months
* Ability to provide informed consent/authorization

Control Participants:

* Right-handed
* Absence of medical, neurological, and psychiatric illness (including alcohol and substance abuse), as assessed by the SCID
* Absence of any medications for at least 2 weeks
* Informed consent/authorization

Exclusion Criteria:

* Left-handed/ambidextrous
* Evidence of neurological illness
* Current alcohol or substance abuse
* Serious suicide or homicide risk

Primary outcomes:
Secondary outcomes:
Other outcomes:
Locations:
city: Boston
country: United States
facility: The Depression Clinical and Research Program, Massachusetts General Hospital
state: Massachusetts
city: Cambridge
country: United States
facility: Affective Neuroscience Laboratory, Department of Psychology, Harvard University
state: Massachusetts
Study officials:
affiliation: Harvard University
name: Diego A Pizzagalli, PhD
role: PRINCIPAL_INVESTIGATOR
References: