- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02626832
Regulation of Arginine-vasopressin (AVP) (REGAVP)
December 8, 2015 updated by: Yale University
Regulation of Arginine-vasopressin (AVP) in Psychiatric Disorders
This study aims to develop a method for the assessment of central NMDA receptor functioning in patients with depression and schizophrenia.
For this purpose a transitional approach is used based on preclinical studies that show a dose-dependent relationship between the activity of hypothalamic NMDA receptor and plasma AVP response to increasing plasma osmolality.
Patients with schizophrenia, depression and healthy controls participated in this study.
The Investigators found that in a subgroup of patients with schizophrenia the AVP response was low and that in a subgroup of subjects with depression the AVP response was high compared to healthy controls.
Study Overview
Detailed Description
Evidence suggests that altered N-methyl-D-aspartate (NMDA) receptor activity and glutamate signaling may underlie the pathogenesis of both schizophrenia and depression at least in subgroups of patients.
In schizophrenia, pharmacologic modeling, postmortem and imaging data suggest reduced NMDA signaling.
In contrast, recent clinical trials demonstrating the efficacy of the NMDA antagonist ketamine in severely depressed patients suggest increased NMDA receptor signaling.
The Investigators have conducted a proof of concept study to assess whether there is any in vivo evidence for an inverse association in depression and schizophrenia with respect to the NMDA receptor function.
For this purpose the investigators used a translational approach, based on findings from animal studies that NMDA receptor is a key mediator of arginine-vasopressin (AVP) release into the bloodstream.
Using hypertonic saline to induce AVP release, as done in animal studies, it was found that in a subgroup of depressed patients, NMDA receptor mediated AVP release was significantly increased, whereas in a subgroup of schizophrenia patients, the same response was abnormally low.
Previous research has demonstrated that this response is well conserved.
These findings are consistent with implicated NMDA receptor related abnormalities in depression and schizophrenia in subgroups of patients, and provide the first in vivo evidence towards this dichotomy.
Study Type
Interventional
Enrollment (Actual)
25
Phase
- Not Applicable
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
Connecticut
-
New Haven, Connecticut, United States, 06519
- The John Pierce Laboratory
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West Haven, Connecticut, United States, 06516
- VA Connecticut Healthcare System
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years to 55 years (Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion criteria for healthy controls:
- Ages of 18-55 years from all ethnic backgrounds.
- Male or female.
- Smoker or nonsmoker.
- Written informed consent.
Exclusion criteria for healthy controls:
- DSM-IV diagnosis of psychotic, anxiety, mood disorder.
- History of major psychiatric disorder in first-degree relatives.
- A history of significant medical/neurological disease. Unstable medical condition based on EKG, vital signs, physical examination and laboratory work-up (CBC with differential, SMA-7, uric acid, creatinine clearance, LFTs, TFTs, UA, Utox, Urine pregnancy test).
- A history of cardiac disease including arrhythmias; history of syncope or unexplained loss of consciousness; history of renal stones or renal failure; history of diabetes mellitus or diabetes insipidus.
- Subjects with hypertension (BP > 140/90).
- Current hyponatremia.
- Serum Ca2+ and uric acid levels that are above normal range.
- Serum creatinine outside of normal range for age.
- Creatinine clearance <70 ml/min using the Cockcroft-Gault equation (Cockcroft et al 1976) [(140-age)*(weight in kg)*(.85 if female)/(72*Cr)].
- Any medication that in the opinion of the PI could interfere with either the safety of the study and/or the outcome measures, such as diuretics of any type, lithium, carbamazepine.
- Current substance abuse/dependency determined by urine toxicology.
- Current treatment with medications with psychotropic effects.
- Current pregnancy, unsatisfactory birth control method report for females.
- IQ < 70 as determined by Wechsler Abbreviated Scale of Intelligence.
- Non-English speaking.
Inclusion criteria for patients with schizophrenia:
- Ages of 21-55 years from all ethnic backgrounds.
- Male or female.
- Smoker or nonsmoker.
- Written informed consent.
- DSM-IV diagnosis of schizophrenia or schizoaffective disorder.
- For treated patients: The patient has been on a stable dose of antipsychotics for the past month and does not require a change of medications or dose adjustment at study entry.
- For untreated patients: Has refused to be treated with medications, maintains regular clinic appointments with the clinicians, and does not pose an imminent danger to himself or others.
Exclusion criteria for patients with schizophrenia
- A history of significant medical/neurological disease. Unstable medical condition based on EKG, vital signs, physical examination and laboratory work-up (CBC with differential, SMA-7, uric acid, creatinine clearance, LFTs, TFTs, UA, Utox, Urine pregnancy test).
- A history of cardiac disease including arrhythmias; history of syncope or unexplained loss of consciousness; history of renal stones or renal failure; history of diabetes mellitus or diabetes insipidus.
- Serum Ca2+ and uric acid levels that are above normal range.
- Serum creatinine outside of normal range for age.
- Creatinine clearance <70 ml/min using the Cockcroft-Gault equation [(140-age)*(weight in kg)*(.85 if female)/(72*Cr)].
- Subjects with hypertension (BP > 140/90).
- Current hyponatremia.
- Any medication that in the opinion of the PI could interfere with either the safety of the study and/or the outcome measures, such as diuretics of any type, lithium, carbamazepine.
- Currently on clozapine as clozapine may interfere with brain water regulation (Leadbetter and Shutty, 1994).
- Current substance abuse/dependency determined by urine toxicology.
- Current pregnancy, unsatisfactory birth control method report for females.
- IQ < 70 as determined by Wechsler Abbreviated Scale of Intelligence.
- Non-English speaking.
Inclusion criteria for patients with depression:
- Ages of 21-55 years from all ethnic backgrounds.
- Male or female.
- Smoker or nonsmoker.
- Written informed consent.
- DSM-IV diagnosis of major depressive disorder, unipolar.
- For treated patients: The patient has been on a stable dose of medications (antidepressants) for the past month and does not require a change of medications or dose adjustment at study entry.
- For untreated patients: Has refused to be treated with medications, maintains regular clinic appointments with the clinicians, and does not pose an imminent danger to himself or others.
Exclusion criteria for patients with depression:
- A history of significant medical/neurological disease. Unstable medical condition based on EKG, vital signs, physical examination and laboratory work-up (CBC with differential, SMA-7, uric acid, creatinine clearance, LFTs, TFTs, UA, Utox, Urine pregnancy test).
- A history of cardiac disease including arrhythmias; history of syncope or unexplained loss of consciousness; history of renal stones or renal failure; history of diabetes mellitus or diabetes insipidus.
- Serum Ca2+ and uric acid levels that are above normal range.
- Serum creatinine outside of normal range for age.
- Creatinine clearance <70 ml/min using the Cockcroft-Gault equation [(140-age)*(weight in kg)*(.85 if female)/(72*Cr)].
- Subjects with hypertension (BP > 140/90).
- Current hyponatremia.
- Any medication that in the opinion of the PI could interfere with either the safety of the study and/or the outcome measures, such as diuretics of any type, lithium, carbamazepine.
- Current substance abuse/dependency determined by urine toxicology.
- Current pregnancy, unsatisfactory birth control method report for females.
- IQ < 70 as determined by Wechsler Abbreviated Scale of Intelligence.
- Non-English speaking.
Inclusion criteria for patients from the PRIME Clinic:
- Ages of 18-40 years from all ethnic backgrounds.
- Male or female.
- Smoker or nonsmoker.
- Written informed consent.
Exclusion criteria for patients from the PRIME Clinic:
- A history of significant medical/neurological disease. Unstable medical condition based on EKG, vital signs, physical examination and laboratory work-up (CBC with differential, SMA-7, uric acid, creatinine clearance, LFTs, TFTs, UA, Utox, Urine pregnancy test).
- A history of cardiac disease including arrhythmias; history of syncope or unexplained loss of consciousness; history of renal stones or renal failure; history of diabetes mellitus or diabetes insipidus.
- Serum Ca2+ and uric acid levels that are above normal range.
- Serum creatinine outside of normal range for age.
- Creatinine clearance <70 ml/min using the Cockcroft-Gault equation [(140-age)*(weight in kg)*(.85 if female)/(72*Cr)].
- Subjects with hypertension (BP > 140/90).
- Current hyponatremia.
- Any medication that in the opinion of the PI could interfere with either the safety of the study and/or the outcome measures, such as diuretics of any type, lithium, carbamazepine.
- Currently on clozapine as clozapine may interfere with brain water regulation (Leadbetter and Shutty, 1994).
- Current substance abuse/dependency determined by urine toxicology.
- Current pregnancy, unsatisfactory birth control method report for females.
- IQ < 70 as determined by Wechsler Abbreviated Scale of Intelligence.
- Non-English speaking.
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Diagnostic
- Allocation: Non-Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Healthy Control
This group is represented by healthy controls
|
All subjects receive intravenous hypertonic saline and serial blood samples are drawn for AVP concentrations
|
Experimental: Depression
This experimental group is represented by subjects with depression
|
All subjects receive intravenous hypertonic saline and serial blood samples are drawn for AVP concentrations
|
Experimental: Schizophrenia
This experimental group is represented by subjects with schizophrenia
|
All subjects receive intravenous hypertonic saline and serial blood samples are drawn for AVP concentrations
|
Experimental: Prodromal subjects
This experimental group is represented by subjects with prodromal symptoms for schizophrenia
|
All subjects receive intravenous hypertonic saline and serial blood samples are drawn for AVP concentrations
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
AVP response to plasma osmolality as measured by slopes between the two variables
Time Frame: Within 3 months
|
Within 3 months
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Handan Gunduz-Bruce, MD, MBA, Yale University
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start
February 1, 2010
Primary Completion (Actual)
November 1, 2013
Study Completion (Actual)
December 1, 2014
Study Registration Dates
First Submitted
November 4, 2015
First Submitted That Met QC Criteria
December 8, 2015
First Posted (Estimate)
December 10, 2015
Study Record Updates
Last Update Posted (Estimate)
December 10, 2015
Last Update Submitted That Met QC Criteria
December 8, 2015
Last Verified
December 1, 2015
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- 0910005875
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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