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Quetiapine Related Neurochemical Changes as Measured by Magnetic Resonance Spectroscopy in Schizophrenia

This study has been completed.
National Science Council, Taiwan
Information provided by:
National Taiwan University Hospital Identifier:
First received: November 24, 2008
Last updated: April 27, 2009
Last verified: April 2009
we aim to examine whether a representative atypical antipsychotic, quetiapine, has different effects from conventional antipsychotics on the magnetic resonance spectroscopy (MRS) markers in schizophrenia patients.

Condition Intervention Phase
Schizophrenia Drug: quetiapine Other: no intervention Phase 4

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Quetiapine Related Neurochemical Changes as Measured by Magnetic Resonance Spectroscopy in Patients With Schizophrenia

Resource links provided by NLM:

Further study details as provided by National Taiwan University Hospital:

Primary Outcome Measures:
  • The change from baseline in neurochemical peak area ratios (NAA/CRE, NAA/CHO, CHO/CRE) at the end of study [ Time Frame: baseline and 28 th day ]

Secondary Outcome Measures:
  • changes from baseline in PANSS [ Time Frame: baseline and 28th day ]

Enrollment: 30
Study Start Date: January 2007
Study Completion Date: April 2009
Primary Completion Date: March 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: 1. quetiapine
quetiapine would replace the original conventional antipsychotic agent
Drug: quetiapine
quetiapine (with equivalent dose to original antipsychotic agent) would replace the original antipsychotic agent for 28 days
Other Name: seroquel
No Intervention: 2. conventional antipsychotics Other: no intervention
keep the original conventional antipsychotic agent for 28 days
Other Name: typical antipsychotics

Detailed Description:

The impact of medications on MRS changes in brain of schizophrenia patients have rarely been studied through a well-controlled study. Most of the MRS studies in schizophrenia patients are cross-sectional and uncontrolled and devoid of any comparison between effects of different drugs. To date, only limited research has explored this issue and the results are conflicting. These conflicting results may be related to small sample size, different patient population and design in these studies. Thus, further studies are warranted. Besides, with the advent of new generation atypical antipsychotics, it will be important to know whether atypical antipsychotics exert different effects on neurons from conventional antipsychotics. If neuronal activity can be improved by atypical antipsychotics, the findings will have great clinical implications.

Fifteen patients in the experimental group will receive MRS examinations (including bilateral frontal and temporal area) in two phases: baseline (when they are on a conventional antipsychotic) and 4 weeks after shifting from that conventional antipsychotic to quetiapine. Another 15 schizophrenia patients receiving conventional antipsychotics will serve as the control group. The control group will receive the MRS examinations twice (baseline and 4 weeks later) without change of medications. In each phase, every patient will also receive the Positive and Negative Syndrome Scale (PANSS) assessment. The changes of the MRS markers will be analyzed and compared, both within and between the 2 groups, and their correlations with the PANSS scores will be explored.


Ages Eligible for Study:   20 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Provision of written informed consent
  2. A diagnosis of schizophrenia or schizoaffective disorder by Diagnostic and Statistical Manual of Mental Disorders- Fourth Edition (DSM-IV)
  3. Females or males aged > 20 and < 65 years
  4. Female patients of childbearing potential must be using a reliable method of contraception and have a negative urine human chorionic gonadotropin (HCG) test at enrolment
  5. Able to understand and comply with the requirements of the study
  6. Undergoing treatment with a conventional antipsychotic drug and is clinically stable

Exclusion Criteria:

  1. Pregnancy or lactation
  2. Any DSM-IV Axis I disorder not defined in the inclusion criteria
  3. Patients who, in the opinion of the investigator, pose an imminent risk of suicide or a danger to self or others
  4. Known intolerance or lack of response to quetiapine, as judged by the investigator
  5. Use of any of the following cytochrome P450 3A4 inhibitors in the 14 days preceding enrolment including but not limited to: ketoconazole, itraconazole, fluconazole, erythromycin, clarithromycin, troleandomycin, indinavir, nelfinavir, ritonavir, fluvoxamine and saquinavir
  6. Use of any of the following cytochrome P450 inducers in the 14 days preceding enrollment including but not limited to: phenytoin, carbamazepine, barbiturates, rifampicin, St. John's Wort, and glucocorticoids
  7. Administration of a depot antipsychotic injection within one dosing interval (for the depot) before randomisation
  8. Substance or alcohol dependence at enrolment (except dependence in full remission, and except for caffeine or nicotine dependence), as defined by DSM-IV criteria
  9. Opiates, amphetamine, barbiturate, cocaine, cannabis, or hallucinogen abuse by DSM-IV criteria within 4 weeks prior to enrolment
  10. Medical conditions that would affect absorption, distribution, metabolism, or excretion of study treatment as judged by the investigator
  11. Involvement in the planning and conduct of the study
  12. Previous enrolment or randomisation of treatment in the present study.
  13. Participation in another drug trial within 4 weeks prior enrolment into this study or longer in accordance with local requirements
  14. Subjects with metal prosthesis such as cardiac valves etc
  15. Severe neurological co-morbidity such as stroke, encephalopathy etc or medical conditions that will compromise on the safety of patients such as acute myocardial infarction, systemic infections etc as judged by the investigator
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Please refer to this study by its identifier: NCT00797927

Department of Psychiatry, National Taiwan University Hospital
Taipei, Taiwan, 100
Sponsors and Collaborators
National Taiwan University Hospital
National Science Council, Taiwan
Principal Investigator: Tzung-Jeng Hwang, MD Department of Psychiatry, National Taiwan University Hospital
  More Information

Responsible Party: Tzung-Jeng Hwang, attending psychiatrist, National Taiwan University Hospital Identifier: NCT00797927     History of Changes
Other Study ID Numbers: 200702010M
Study First Received: November 24, 2008
Last Updated: April 27, 2009

Keywords provided by National Taiwan University Hospital:
conventional antipsychotics
magnetic resonance spectroscopy

Additional relevant MeSH terms:
Schizophrenia Spectrum and Other Psychotic Disorders
Mental Disorders
Antipsychotic Agents
Quetiapine Fumarate
Tranquilizing Agents
Central Nervous System Depressants
Physiological Effects of Drugs
Psychotropic Drugs processed this record on August 18, 2017