Quetiapine Related Neurochemical Changes as Measured by Magnetic Resonance Spectroscopy in Schizophrenia
Quetiapine Related Neurochemical Changes as Measured by Magnetic Resonance Spectroscopy in Patients With Schizophrenia
Visão geral do estudo
Status
Condições
Intervenção / Tratamento
Descrição detalhada
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.
Tipo de estudo
Inscrição (Real)
Estágio
- Fase 4
Contactos e Locais
Locais de estudo
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Taipei, Taiwan, 100
- Department of Psychiatry, National Taiwan University Hospital
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Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
Aceita Voluntários Saudáveis
Gêneros Elegíveis para o Estudo
Descrição
Inclusion Criteria:
- Provision of written informed consent
- A diagnosis of schizophrenia or schizoaffective disorder by Diagnostic and Statistical Manual of Mental Disorders- Fourth Edition (DSM-IV)
- Females or males aged > 20 and < 65 years
- 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
- Able to understand and comply with the requirements of the study
- Undergoing treatment with a conventional antipsychotic drug and is clinically stable
Exclusion Criteria:
- 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, 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 enrollment including but not limited to: phenytoin, carbamazepine, barbiturates, rifampicin, St. John's Wort, and glucocorticoids
- Administration of a depot antipsychotic injection within one dosing interval (for the depot) before randomisation
- Substance or alcohol dependence at enrolment (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 enrolment
- Medical conditions that would affect absorption, distribution, metabolism, or excretion of study treatment as judged by the investigator
- Involvement in the planning and conduct of the study
- Previous enrolment or randomisation of treatment in the present study.
- Participation in another drug trial within 4 weeks prior enrolment into this study or longer in accordance with local requirements
- Subjects with metal prosthesis such as cardiac valves etc
- 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
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Tratamento
- Alocação: Não randomizado
- Modelo Intervencional: Atribuição Paralela
- Mascaramento: Nenhum (rótulo aberto)
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
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Experimental: 1. quetiapine
quetiapine would replace the original conventional antipsychotic agent
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quetiapine (with equivalent dose to original antipsychotic agent) would replace the original antipsychotic agent for 28 days
Outros nomes:
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Sem intervenção: 2. conventional antipsychotics
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keep the original conventional antipsychotic agent for 28 days
Outros nomes:
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O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Prazo |
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The change from baseline in neurochemical peak area ratios (NAA/CRE, NAA/CHO, CHO/CRE) at the end of study
Prazo: baseline and 28 th day
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baseline and 28 th day
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Medidas de resultados secundários
Medida de resultado |
Prazo |
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changes from baseline in PANSS
Prazo: baseline and 28th day
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baseline and 28th day
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Colaboradores e Investigadores
Patrocinador
Colaboradores
Investigadores
- Investigador principal: Tzung-Jeng Hwang, MD, Department of Psychiatry, National Taiwan University Hospital
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo
Conclusão Primária (Real)
Conclusão do estudo (Real)
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Estimativa)
Atualizações de registro de estudo
Última Atualização Postada (Estimativa)
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Mais Informações
Termos relacionados a este estudo
Palavras-chave
Termos MeSH relevantes adicionais
Outros números de identificação do estudo
- 200702010M
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