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Quetiapine Induced Neuroplasticity in First-episode Schizophrenic Patients

This study has been completed.
Information provided by (Responsible Party):
Goeran Hajak, University of Regensburg Identifier:
First received: November 6, 2007
Last updated: October 21, 2011
Last verified: October 2011
Aim of the study is to assess the effect of quetiapine treatment in neuroleptic naive, first-episode schizophrenic patients on aspects of functional and structural neuroplasticity assessed by means of transcranial magnetic stimulation and voxel-based morphometry. Main outcome measure is a change in gray matter density under quetiapine treatment from baseline to steady-state-treatment after 3 weeks.

Condition Intervention Phase
Drug: Quetiapine
Phase 4

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Official Title: Quetiapine Induced Neuroplasticity in Schizophrenic Patients: A Combined Transcranial Magnetic Stimulation (TMS) and Voxel-based Morphometry (VBM) Study

Resource links provided by NLM:

Further study details as provided by University of Regensburg:

Primary Outcome Measures:
  • Change of structural neuroplasticity (i.e. change in gray matter density) under treatment with quetiapine assessed by voxel-based morphometry. [ Time Frame: 3 weeks ]

Secondary Outcome Measures:
  • Change of functional neuroplasticity (i.e. cortical excitability) under quetiapine treatment assessed by paired-pulse TMS [ Time Frame: 3 weeks ]
  • To evaluate the influence of BDNF gene polymorphisms on clinical effects of quetiapine treatment, cortical excitability and brain morphology [ Time Frame: 3 weeks ]

Enrollment: 30
Study Start Date: March 2008
Study Completion Date: March 2011
Primary Completion Date: December 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: A
Patients will be taken quetiapine for the treatment of first episode schizophrenia.
Drug: Quetiapine
Quetiapine will be administered open label as clinically required according to current guidelines. Target dose range: 400 - 800 mg quetiapine per day.
Other Names:
  • Seroquel IR
  • Seroquel Prolong


Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • diagnosis of first episode of schizophrenia according to Diagnostic and Statistical Manual of Mental Disorders- Fourth Edition (DSM-IV) criteria and no history of neuroleptic medication
  • Females and/or males aged 18 to 65 years
  • Mild to moderate schizophrenia

Exclusion Criteria:

  • Neuroleptic treatment prior to study enrollment
  • Pregnancy or lactation
  • Any DSM-IV Axis I disorder not defined in the inclusion criteria
  • Patients who, in the opinion of the investigator, pose an imminent risk of suicide or a danger to self or others
  • Known intolerance or lack of response to quetiapine fumarate as judged by the investigator
  • 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
  • Use of any of the following cytochrome P450 inducers in the 14 days preceding enrolment including but not limited to: phenytoin, carbamazepine, barbiturates, rifampin, St. John's Wort, and glucocorticoids
  • Any history of neuroleptic treatment
  • Substance or alcohol dependence at enrollment (except dependence in full remission, and except for caffeine or nicotine dependence), as defined by DSM-IV criteria
  • Opiates, amphetamine, barbiturate, cocaine, cannabis, or hallucinogen abuse by DSM-IV criteria within 4 weeks prior to enrollment
  • Medical conditions that would affect absorption, distribution, metabolism, or excretion of study treatment
  • Unstable or inadequately treated medical illness (e.g. angina pectoris, hypertension, congestive heart failure) as judged by the investigator
  • Involvement in the planning and conduct of the study
  • History of or evidence of significant brain malformation or neoplasm, head injury, cerebral vascular events, neurodegenerative disorder affecting the brain or prior brain surgery
  • Concomitant treatment with psychotropic drugs (e.g. antidepressive agents, anticonvulsants, other neuroleptics) except benzodiazepines or hypnotics
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Please refer to this study by its identifier: NCT00554658

University of Regensburg, Department of Psychiatry
Regensburg, Germany, 93053
Sponsors and Collaborators
University of Regensburg
Principal Investigator: Goeran Hajak, MD, PhD University of Regensburg
  More Information

Responsible Party: Goeran Hajak, Prof. Dr. med., University of Regensburg Identifier: NCT00554658     History of Changes
Other Study ID Numbers: D1443L00015
Study First Received: November 6, 2007
Last Updated: October 21, 2011

Additional relevant MeSH terms:
Schizophrenia Spectrum and Other Psychotic Disorders
Mental Disorders
Quetiapine Fumarate
Antipsychotic Agents
Tranquilizing Agents
Central Nervous System Depressants
Physiological Effects of Drugs
Psychotropic Drugs processed this record on April 28, 2017