SchizophreniaNCT01524380
Ginkgo Biloba Extract for Schizophrenia
A study testing Ginkgo biloba extract in people with Schizophrenia, run by Beijing HuiLongGuan Hospital at 1 site in China.
Trial summary
A double-blind, randomized, placebo-controlled trial of ginkgo biloba extract (Egb-761) as an add-on therapy to risperidone compared to risperidone plus placebo in the treatment of 200 treatment-naive first-episode patients with schizophrenia. The study addresses an immune dysfunction hypothesis of schizophrenia. Read more about this study
- Who is it for?
- Ages 18 to 45 yearsHealthy volunteers can take part
- Conditions the study is for
- Schizophrenia
- What is being tested?
- Ginkgo biloba extract
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 124 participants
- Where
- 1 siteChina
- Study dates
- Sep 2011to Aug 2013
- Phase
- Interventional
- 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 18 to 45 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- Diagnosis of schizophrenia or schizophreniform disorder;
- Duration of symptoms not longer than 60 months;
- No prior treatment with antipsychotic medication or, if previously treated, a total lifetime usage of less than 14 days;
- Between 16 and 40 years of age; and
- Current psychotic symptoms of moderate severity.
Who cannot join
- A DSM-IV Axis I diagnosis other than schizophrenia or schizophreniform;
- Documented disease of the central nervous system that can interfere with the trial assessments including, but not limited to stroke, tumor, Parkinson's disease, Huntington's disease, seizure disorder, history of brain trauma resulting in significant impairment, chronic, infection;
- Acute, unstable and/or significant and untreated medical illness (e.g., infection, unstable diabetes, uncontrolled hypertension);
- A clinically significant ECG abnormality in the opinion of the investigator;
- Pregnant or breast-feeding female;
- Use of disallowed concomitant therapy;
- History of severe allergy or hypersensitivity.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: A Double-blind and Randomized Trial of Ginkgo Biloba Extract Added to Risperidone in Treatment-naive First-episode Schizophrenia
A double-blind, randomized, placebo-controlled trial of ginkgo biloba extract (Egb-761) as an add-on therapy to risperidone compared to risperidone plus placebo in the treatment of 200 treatment-naive first-episode patients with schizophrenia. The study addresses an immune dysfunction hypothesis of schizophrenia.
Read the detailed description
OBJECTIVE: There is evidence that an excessive free radical production or oxidative stress may be involved in the pathophysiology of patients with schizophrenia. The investigators hypothesize that antioxidant therapy by using an add-on agent together with a well-proven antipsychotic drug may have favorable effects on some schizophrenic patients.
METHODS:
- Clinical Trial: This is a randomized, double-blind and parallel controlled trial in treatment-naive first-episode patients with schizophrenia. The study consists of a 1-week stabilization phase, followed by 10 weeks of double-blind treatment. The total trial duration is 11 weeks.
- Medications: Eligible patients are randomly assigned to either capsulized EGb(240mg.day) or identically capsulized placebo addition to the risperidone (2-6mg/day) in a double-blind fashion.
- Assessment Procedures:
3.1. Primary Outcome Variable-psychopathology: Assessment instruments include the Positive and Negative Syndrome Scale (PANSS), and the Clinical Global Impression (CGI). Patients are interviewed at screening, at baseline and at every two weeks.
3.2. Cognitive tests: A comprehensive battery of tests encompassing the cognitive domains of executive function, attention, memory, perception, and general intellect is administered twice at baseline and at the end of 10-week treatment by a trained psychologist. Scoring follows standardized procedures.
3.3. Side Effects: Parkinsonism is rated with the Simpson-Angus Scale for extrapyramidal side effects. The Abnormal Involuntary Movement Scale (AIMS) is chosen to assess tardive dyskinesia (TD) severity. All of the AIMS and Simpson-Angus Rating Scales are administered by the same investigator at baseline and at baseline, and at week 5 and at week 10.
3.4. Plasma Measures: Venous blood from forearm vein is collected from healthy controls and patients with schizophrenia between 7 and 9 a.m. following an overnight fast. Serum Plasma malondialdehyde (MDA) levels and superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and catalase (CAT) activities will be analyzed using established procedures.
- Conditions
- Schizophrenia
- Being tested
- Ginkgo biloba extract, Placebo
- Keywords
- Schizophrenia, clinical trial, risperidone, ginkgo biloba extract, antioxidant
- Medical subject headings
- Schizophrenia
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Ginkgo biloba extractDrug
Also called EGb761
400mg/day, twice a day, 10 weeks
PlaceboDrug
Also called EGb761
twice a day, 10 weeks
| Study group | Role | What they receive |
|---|---|---|
| Ginkgo biloba extract, antioxidant | Active comparator | Active treatment with Ginkgo biloba extract Receives: Drug: Ginkgo biloba extract |
| Placebo | Placebo comparator | Treatment with placebo Receives: Drug: Placebo |
What is being measured
The primary outcome is the main question the study is designed to answer.
PANSS
PANSS
Measured: 11 weeks
Secondary outcomes (2)
CGI
Measured: 11 weeks
Cognition
Measured: 11 weeks
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted2 Feb 2012 (estimated)
- Study startSep 2011
- Primary completionJun 2013
- Study completionAug 2013
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for SchizophreniaStudies of the same condition, open and under way.
- 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 N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Who is masked
- Participant, Investigator
- Enrolment
- 124 participants (actual)
Sponsor and investigators
- Lead sponsor
- Beijing HuiLongGuan Hospital
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Xiang Yang Zhang, Beijing HuiLongGuan Hospital
- Investigators
- Xiang Y Zhang, MD/PhD, Principal investigator, Beijing HuiLongGuan Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01524380
- Sponsor's protocol ID
- Sch-FEP-001
- Status last verified
- Jul 2016
- First submitted
- 28 Jan 2012
- Last updated
- 12 Jul 2016
- Results posted
- No
- Data monitoring committee
- Yes
Publications
Zhang XY, Zhou DF, Su JM, Zhang PY. The effect of extract of ginkgo biloba added to haloperidol on superoxide dismutase in inpatients with chronic schizophrenia. J Clin Psychopharmacol. 2001 Feb;21(1):85-8. doi: 10.1097/00004714-200102000-00015.
PubMed 11199954
Study at a glance
From the registry record, last updated by the sponsor on 12 Jul 2016. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Double-blind and Randomized Trial of Ginkgo Biloba Extract Added to Risperidone in Treatment-naive First-episode Schizophrenia
- ClinicalTrials.gov ID
- NCT01524380
- Acronym / sponsor ID
- Sch-FEP-001
- Conditions
- Schizophrenia
- Keywords
- Schizophrenia, clinical trial, risperidone, ginkgo biloba extract, antioxidant
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 124 participants (actual)
- Lead sponsor
- Beijing HuiLongGuan HospitalUniversity, hospital or other
- Study start
- Sep 2011
- Primary completion
- Jun 2013 (actual)
- Study completion
- Aug 2013 (actual)
- First posted
- 2 Feb 2012 (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.
A double-blind, randomized, placebo-controlled trial of ginkgo biloba extract (Egb-761) as an add-on therapy to risperidone compared to risperidone plus placebo in the treatment of 200 treatment-naive first-episode patients with schizophrenia. The study addresses an immune dysfunction hypothesis of schizophrenia.
Detailed description
OBJECTIVE: There is evidence that an excessive free radical production or oxidative stress may be involved in the pathophysiology of patients with schizophrenia. The investigators hypothesize that antioxidant therapy by using an add-on agent together with a well-proven antipsychotic drug may have favorable effects on some schizophrenic patients.
METHODS:
- Clinical Trial: This is a randomized, double-blind and parallel controlled trial in treatment-naive first-episode patients with schizophrenia. The study consists of a 1-week stabilization phase, followed by 10 weeks of double-blind treatment. The total trial duration is 11 weeks.
- Medications: Eligible patients are randomly assigned to either capsulized EGb(240mg.day) or identically capsulized placebo addition to the risperidone (2-6mg/day) in a double-blind fashion.
- Assessment Procedures:
3.1. Primary Outcome Variable-psychopathology: Assessment instruments include the Positive and Negative Syndrome Scale (PANSS), and the Clinical Global Impression (CGI). Patients are interviewed at screening, at baseline and at every two weeks.
3.2. Cognitive tests: A comprehensive battery of tests encompassing the cognitive domains of executive function, attention, memory, perception, and general intellect is administered twice at baseline and at the end of 10-week treatment by a trained psychologist. Scoring follows standardized procedures.
3.3. Side Effects: Parkinsonism is rated with the Simpson-Angus Scale for extrapyramidal side effects. The Abnormal Involuntary Movement Scale (AIMS) is chosen to assess tardive dyskinesia (TD) severity. All of the AIMS and Simpson-Angus Rating Scales are administered by the same investigator at baseline and at baseline, and at week 5 and at week 10.
3.4. Plasma Measures: Venous blood from forearm vein is collected from healthy controls and patients with schizophrenia between 7 and 9 a.m. following an overnight fast. Serum Plasma malondialdehyde (MDA) levels and superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and catalase (CAT) activities will be analyzed using established procedures.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, investigator)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Ginkgo biloba extract, antioxidant | Active comparator | Drug: Ginkgo biloba extractActive treatment with Ginkgo biloba extract |
| Placebo | Placebo comparator | Drug: PlaceboTreatment with placebo |
Who may qualify
- Ages
- 18 to 45 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (5 listed)
- Diagnosis of schizophrenia or schizophreniform disorder;
- Duration of symptoms not longer than 60 months;
- No prior treatment with antipsychotic medication or, if previously treated, a total lifetime usage of less than 14 days;
- Between 16 and 40 years of age; and
- Current psychotic symptoms of moderate severity.
Key exclusion criteria (7 listed)
- A DSM-IV Axis I diagnosis other than schizophrenia or schizophreniform;
- Documented disease of the central nervous system that can interfere with the trial assessments including, but not limited to stroke, tumor, Parkinson's disease, Huntington's disease, seizure disorder, history of brain trauma resulting in significant impairment, chronic, infection;
- Acute, unstable and/or significant and untreated medical illness (e.g., infection, unstable diabetes, uncontrolled hypertension);
- A clinically significant ECG abnormality in the opinion of the investigator;
- Pregnant or breast-feeding female;
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 |
|---|---|---|
| Ginkgo biloba extractAlso: EGb761400mg/day, twice a day, 10 weeks | Drug | Ginkgo biloba extract, antioxidant |
| PlaceboAlso: EGb761twice a day, 10 weeks | Drug | Placebo |
Primary outcome
PANSS
Time frame: 11 weeks
PANSS
2 secondary outcomes
CGI
Time frame: 11 weeks
Cognition
Time frame: 11 weeks
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 12 Jul 2016.
- Results publication: PubMed 11199954Zhang XY, Zhou DF, Su JM, Zhang PY. The effect of extract of ginkgo biloba added to haloperidol on superoxide dismutase in inpatients with chronic schizophrenia. J Clin Psychopharmacol. 2001 Feb;21(1):85-8. doi: 10.1097/00004714-200102000-00015.
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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.
Xiang Y Zhang, MD/PhD principal investigator
Beijing HuiLongGuan Hospital
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Ginkgo biloba extract in people with Schizophrenia, run by Beijing HuiLongGuan Hospital at 1 site in China.
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 5 inclusion and 7 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 12 Jul 2016. 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 China. 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. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
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?
PANSS (time frame: 11 weeks). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT01524380, which also lists 1 linked publication.
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 12 Jul 2016.