SchizophreniaPhase 4NCT00797927
Quetiapine Related Neurochemical Changes as Measured by Magnetic Resonance Spectroscopy in Schizophrenia
A Phase 4 study testing quetiapine in people with Schizophrenia, run by National Taiwan University Hospital at 1 site in Taiwan.
Trial summary
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. Read more about this study
- Who is it for?
- Ages 20 to 65 years
- Conditions the study is for
- Schizophrenia
- What is being tested?
- quetiapine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 30 participants
- Where
- 1 siteTaiwan
- Study dates
- Jan 2007to Apr 2009
- Phase
- Phase 4
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 20 to 65 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- 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
Who cannot join
- 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
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- 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
Trial locations and contacts
1 site in 1 country.
Taiwan1 site
Department of Psychiatry, National Taiwan University Hospital
Taipei, 100
About this study
Official title: Quetiapine Related Neurochemical Changes as Measured by Magnetic Resonance Spectroscopy in Patients With Schizophrenia
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.
Read the 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.
- Conditions
- Schizophrenia
- Being tested
- quetiapine, no intervention
- Keywords
- schizophrenia, quetiapine, conventional antipsychotics, magnetic resonance spectroscopy
- Medical subject headings
- Schizophrenia
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
quetiapineDrug
Also called seroquel
quetiapine (with equivalent dose to original antipsychotic agent) would replace the original antipsychotic agent for 28 days
no interventionOther
Also called typical antipsychotics
keep the original conventional antipsychotic agent for 28 days
| Study group | Role | What they receive |
|---|---|---|
| 1. quetiapine | Experimental | quetiapine would replace the original conventional antipsychotic agent Receives: Drug: quetiapine |
| 2. conventional antipsychotics | No intervention | Not described Receives: Other: no intervention |
What is being measured
The primary outcome is the main question the study is designed to answer.
The change from baseline in neurochemical peak area ratios (NAA/CRE, NAA/CHO, CHO/CRE) at the end of study
Measured: baseline and 28 th day
Secondary outcomes (1)
changes from baseline in PANSS
Measured: baseline and 28th day
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted25 Nov 2008 (estimated)
- Study startJan 2007
- Primary completionMar 2009
- Study completionApr 2009
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for SchizophreniaStudies of the same condition, open and under way.
- More trials run by National Taiwan University HospitalThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 4
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 30 participants (actual)
Sponsor and investigators
- Lead sponsor
- National Taiwan University Hospital
- Sponsor type
- University, hospital or other
- Collaborators
- National Science and Technology Council, Taiwan
- Investigators
- Tzung-Jeng Hwang, MD, Principal investigator, Department of Psychiatry, National Taiwan University Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00797927
- Sponsor's protocol ID
- 200702010M
- Status last verified
- Apr 2009
- First submitted
- 24 Nov 2008
- Last updated
- 29 Apr 2009
- Results posted
- No
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 29 Apr 2009. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Quetiapine Related Neurochemical Changes as Measured by Magnetic Resonance Spectroscopy in Patients With Schizophrenia
- ClinicalTrials.gov ID
- NCT00797927
- Acronym / sponsor ID
- 200702010M
- Conditions
- Schizophrenia
- Keywords
- schizophrenia, quetiapine, conventional antipsychotics, magnetic resonance spectroscopy
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 30 participants (actual)
- Lead sponsor
- National Taiwan University HospitalUniversity, hospital or other
- Collaborators
- National Science and Technology Council, Taiwan
- Study start
- Jan 2007
- Primary completion
- Mar 2009 (actual)
- Study completion
- Apr 2009 (actual)
- First posted
- 25 Nov 2008 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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.
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.
Study design
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| 1. quetiapine | Experimental | Drug: quetiapinequetiapine would replace the original conventional antipsychotic agent |
| 2. conventional antipsychotics | No intervention | Other: no intervention |
Who may qualify
- Ages
- 20 to 65 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (6 listed)
- 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
Key exclusion criteria (15 listed)
- 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
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| quetiapineAlso: seroquelquetiapine (with equivalent dose to original antipsychotic agent) would replace the original antipsychotic agent for 28 days | Drug | 1. quetiapine |
| no interventionAlso: typical antipsychoticskeep the original conventional antipsychotic agent for 28 days | Other | 2. conventional antipsychotics |
Primary outcome
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
1 secondary outcome
changes from baseline in PANSS
Time frame: baseline and 28th day
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 Apr 2009.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Tzung-Jeng Hwang, MD principal investigator
Department of Psychiatry, National Taiwan University Hospital
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 4 study testing quetiapine in people with Schizophrenia, run by National Taiwan University Hospital at 1 site in Taiwan.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 6 inclusion and 15 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 29 Apr 2009. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Taiwan. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
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). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 Apr 2009.