Glutamatergic Amino Acids and Oxytocin Levels in the Plasma of Patients in First Psychotic Episode (FPE)- Before and After Neuroleptic Treatment

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00789022
Recruitment Status : Unknown
Verified November 2008 by Shalvata Mental Health Center.
Recruitment status was:  Not yet recruiting
First Posted : November 11, 2008
Last Update Posted : November 11, 2008
Information provided by:
Shalvata Mental Health Center

Brief Summary:

The goal of our research is to check the levels of D-Serine, Glycine, and other Glutamatergic amino acids, in patients with First Psychotic Episode (FPE). These patients are in the early stage of the disease, treated with neuroleptics for short periods of time, and are usually hospitalized for the first time. The hypothesis of the research is that we will find low levels of Glycine and D-Serine in these patients. Following an Anti-psychotic treatment we will expect these levels to return to the norm, and that this correction will be accompanied by a reduction of positive and negative symptoms.

In addition, we will check the D-Serine and Glycine levels in the plasma of first degree relatives of the patients and a group of healthy subjects. The results of this study might support the hypothesis that the Glutamatergic system in involved in the pathology of Schizophrenia from it's early stages.

In addition, we will check the levels of Oxytocin and Estrogen in the plasma of patients in FPE. Our hypothesis is that we will find low levels of Estrogen and High levels of Oxytocin in this group of patients. The results of the study might support the hypothesis that Estrogen and Oxytocin are involved in the pathology of Schizophrenia from it's early stages.

Condition or disease
Schizophrenia Schizophreniform Schizoaffective Disorder Brief Psychotic Episode

Study Type : Observational
Estimated Enrollment : 80 participants
Time Perspective: Prospective
Study Start Date : January 2009
Estimated Primary Completion Date : July 2010

Resource links provided by the National Library of Medicine

40 subjects in a First Psychotic Episode
20 First Degree relatives
20 Healthy subjects

Primary Outcome Measures :
  1. Glycine and D-Serine levels in the plasma. [ Time Frame: 6-8 weeks ]

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 60 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
Hospitalized patients First degree ralatives Healthy subjects from the community

Inclusion Criteria:

  • Subjects between 18-60 years
  • Clinical Diagnosis of Schizophrenia, Schizophreniphorm disorder, Schizoaffective Disorder, Brief esychotic episode

Exclusion Criteria:

  • two years or more of positive symptoms
  • Neuroleptic treatment for more then twe weeks in the prior month, or for more then six weeks at any time.
  • Drug induced psychotic episode

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00789022

Contact: Uri Nitzan, Md 00-972-9-7478532
Contact: Uriel Levi-Herscho, MD 00-972-2-5316906 uriel heresco-levy []

Shalvata Medical Center Active, not recruiting
Hod Hasharom, Israel
Sponsors and Collaborators
Shalvata Mental Health Center

Responsible Party: Dr. Uri Nitzan, Resident Identifier: NCT00789022     History of Changes
Other Study ID Numbers: uriel111
First Posted: November 11, 2008    Key Record Dates
Last Update Posted: November 11, 2008
Last Verified: November 2008

Keywords provided by Shalvata Mental Health Center:
First-Psychotic-Episode (FPE)
Glutamatergic system

Additional relevant MeSH terms:
Psychotic Disorders
Mental Disorders
Schizophrenia Spectrum and Other Psychotic Disorders
Reproductive Control Agents
Physiological Effects of Drugs