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PET Imaging of mGLuR5 With Drug Challenge

This study has been completed.
Information provided by (Responsible Party):
Yale University Identifier:
First received: September 19, 2012
Last updated: March 10, 2017
Last verified: March 2017
Results First Received: December 21, 2016  
Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment;   Masking: No masking;   Primary Purpose: Other
Conditions: Major Depressive Disorder
Post-Traumatic Stress Disorder (PTSD)
Intervention: Drug: Ketamine

  Participant Flow
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Recruitment Details
Key information relevant to the recruitment process for the overall study, such as dates of the recruitment period and locations
No text entered.

Pre-Assignment Details
Significant events and approaches for the overall study following participant enrollment, but prior to group assignment
No text entered.

Reporting Groups

All subjects will receive ketamine

Ketamine: All subjects will receive ketamine to induce glutamate release in the brain

Participant Flow:   Overall Study
Lost to Follow-up                10 
Physician Decision                4 
Withdrawal by Subject                3 
non-compliance                3 
used for different study                2 
screen fail                19 

  Baseline Characteristics
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Population Description
Explanation of how the number of participants for analysis was determined. Includes whether analysis was per protocol, intention to treat, or another method. Also provides relevant details such as imputation technique, as appropriate.
reason for discrepancy: some subjects completed baseline scan but did not continue with ketamine administration and subsequent scans.

Reporting Groups

All subjects will receive ketamine

Ketamine: All subjects will receive ketamine to induce glutamate release in the brain

Baseline Measures
Overall Participants Analyzed 
[Units: Participants]
[Units: Years]
Mean (Standard Deviation)
 34.07143  (12.12615) 
Sex: Female, Male 
[Units: Participants]
Count of Participants
Female      28  66.7% 
Male      14  33.3% 
[Units: Participants]
Count of Participants
Healthy Control (HC)      20  47.6% 
Major Depressive Disorder (MDD)      14  33.3% 
Post-Traumatic Stress Disorder (PTSD)      4   9.5% 
Comorbid MDD & PTSD      4   9.5% 

  Outcome Measures

1.  Primary:   Change in Glutamate Levels at Baseline and After Ketamine Administration as Confirmed by Positron Emission Tomography (PET) Imaging   [ Time Frame: 1st scan: 90 minute baseline scan; 2nd scan: 90 minutes, ketamine administration at start of scan; scan 3: 90 minute scan 24 hours post ketamine ]

  Serious Adverse Events

  Other Adverse Events

  Limitations and Caveats
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Limitations of the study, such as early termination leading to small numbers of participants analyzed and technical problems with measurement leading to unreliable or uninterpretable data
Study lacks placebo control group Hemodynamic effects of ketamine may alter tracer delivery and washout Study lacks long-term follow up Only non-smokers studied Ketamine dose administered is higher than typical dose used for clinical purposes

  More Information
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Certain Agreements:  
Principal Investigators are NOT employed by the organization sponsoring the study.
There is NOT an agreement between Principal Investigators and the Sponsor (or its agents) that restricts the PI's rights to discuss or publish trial results after the trial is completed.

Results Point of Contact:  
Name/Title: Irina Esterlis, Ph.D.
Organization: Yale University - Psychiatry Department
phone: (203)737-6820

Responsible Party: Yale University Identifier: NCT01691092     History of Changes
Other Study ID Numbers: 1111009365
Study First Received: September 19, 2012
Results First Received: December 21, 2016
Last Updated: March 10, 2017