Glycine to Treat Psychotic Disorders in Children

Childhood Onset Psychotic Disorders: An Open Trial With the Amino Acid Glycine

This study will test the safety and effectiveness of the amino acid glycine in treating psychotic disorders in children. The drug will be given as an adjunct (in addition) to the patient's current antipsychotic medication.

Children age nine to 18 with schizophrenia or schizoaffective disorder whose symptoms began before age 13 may be eligible for this 10-week study. Patients will be hospitalized during the course of the trial. Weekend visits home may be permitted.

Children enrolled in the study will be evaluated during a two-week pre-treatment period with written tests for IQ and academic functioning and with a magnetic resonance imaging (MRI) scan of the brain. For the MRI, the child lies on a table that slides into a large donut-shaped machine with a strong magnetic field. This procedure produces images of the brain that may help identify brain abnormalities in schizophrenia that develop in childhood.

During the eight-week treatment phase, patients will receive glycine powder dissolved in water once a day, in addition to their other antipsychotic medications. They will undergo the following additional procedures during the course of treatment:

  1. Comprehensive psychiatric examination
  2. Blood pressure and pulse monitoring once a week
  3. Blood tests every other week - About one ounce of blood is drawn per week to measure glycine levels
  4. Eye movement study at week eight - Using a technique called infrared oculography, special detectors measure infrared light reflected off the child's eyes while he or she watches a moving square on a video monitor.
  5. Lumbar puncture (spinal tap) once during the study - About one-half ounce of cerebrospinal fluid (the fluid surrounding the brain and spinal cord) is withdrawn through a needle placed in the lower part of the spine for analysis of brain chemicals.

Patients who respond well may continue to receive glycine treatment through their referring physician after the study is completed.

NIMH will follow patients by phone every six months and with visits at two-year intervals.

Study Overview

Status

Completed

Intervention / Treatment

Detailed Description

The ability of glycine to potentiate the NMDA receptor-complex, along with the fact that it is well tolerated in short-and long-term administration, has raised the possibility that it may provide an effective treatment of augmentation for neuroleptic-resistant negative symptoms of schizophrenia. Up to ten children and adolescents, ages 9-18, meeting DSM-IV criteria for schizophrenia, schizoaffective disorder and psychotic disorder not otherwise specified with onset of psychosis by age 12 who have failed at least two prior antipsychotics entering this protocol on their current antipsychotic medication(s) will participate in an open 8-week trial of adjunctive glycine therapy. In addition to the potential benefits, if glycine therapy ameliorates enduring negative symptoms of schizophrenia, we anticipate that recruiting these rare patients will be facilitated by the availability of this new treatment.

This study will provide pilot data regarding the beneficial effects and safety of adjunctive glycine therapy for children and adolescents with treatment refractory psychotic disorders. The availability of newer alternate treatments is also important for recruitment of patients in the broader study of the neurobiology and genetics of very early onset schizophrenia.

Children and adolescents ages nine to eighteen will be allowed into the study. Subjects entering the protocol as new patients will be characterized by clinical phenomenology, eye tracking, MRI brain imaging, cerebrospinal fluid, plasma and urinary biochemistry, and chromosomal analysis. Patients with prominent mood symptoms who have required the addition of mood stabilizing agents such as lithium or valproic acid will be allowed to remain on these medications for the duration of the treatment trial, if clinically indicated. Liver chemistries will be checked at baseline and at the end of the study.

All first-degree relatives are interviewed in person and undergo eye tracking measurement and contribute blood cell lines as part of a genetic study of the cohort (84-M-0050).

Study Type

Interventional

Enrollment

10

Phase

  • Phase 2

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

    • Maryland
      • Bethesda, Maryland, United States, 20892
        • National Institute of Mental Health (NIMH)

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

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Patients with their psychosis in a moderate to severe range defined as a SANS score of 5 or above, a SAPS score of 5 or above and/or a BPRS score of 30 or above.

Males and females, age 9-18 meeting DSM-IV criteria for schizophrenia, schizoaffective disorder or psychotic disorder not otherwise specified with onset of psychosis before their 13th birthday.

Patients must have had their 9th birthday by the end of drug washout.

Patients with failure of two prior antipsychotic treatments, or discontinuation of effective clozapine or olanzapine treatment due to intolerable side effects.

Patients with a premorbid IQ test less than 70.

No patients with any significant neurological/medical disorder; and/or active alcohol or drug abuse.

No patients judged to be at serious suicidal risk.

Females who are physically capable of pregnancy must agree to avoid pregnancy throughout the study. Should pregnancy occur during the study, the patient will be unable to continue.

MRI exam will not be given to patients with any metal prostheses, surgical clips, or other metal implants, or cannot tolerate the procedure.

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: Treatment

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

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

May 1, 2000

Study Completion

January 1, 2002

Study Registration Dates

First Submitted

May 9, 2000

First Submitted That Met QC Criteria

May 9, 2000

First Posted (Estimate)

May 10, 2000

Study Record Updates

Last Update Posted (Estimate)

March 4, 2008

Last Update Submitted That Met QC Criteria

March 3, 2008

Last Verified

January 1, 2002

More Information

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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