Bipolar DisorderPhase 2NCT00026585
Examination of Tamoxifen in Acute Mania in Patients With Bipolar I Disorder
A Phase 2 study testing Tamoxifen in people with Bipolar Disorder, run by National Institute of Mental Health (NIMH) at 1 site in United States.
Trial summary
The purpose of this study is to examine how the drug tamoxifen affects the brain in patients with bipolar I disorder. Bipolar Disorder (BD) is a severe, chronic, and often life-threatening illness for which safe and effective treatments are necessary. Read more about this study
- Who is it for?
- Ages 18 to 65 years, men only
- Conditions the study is for
- Bipolar Disorder
- What is being tested?
- Tamoxifen
- How many people
- 50 participants
- Where
- 1 siteUnited States
- Study dates
- 9 Nov 2001to 2 Nov 2007
- Phase
- Phase 2
- 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 65 years
- Men only
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Patients may be included in the study only if they meet all of the following criteria:
- Male and female patients, 18 to 65 years of age. [Note: Only females who are premenopausal with regular menstrual cycles will be able to participate].
- Female subjects of childbearing potential must be using a medically accepted means of contraception.
- Each patient must have a level of understanding sufficient to agree to all tests and examinations required by the protocol.
- Each patient must understand the nature of the study and must sign an informed consent document. We will not permit patients with a Durable Power of Attorney (DPA) to participate in this study. We will however, encourage all patients to sign a DPA after signing the informed consent. However, signing a DPA is not a requirement for participating in this study.
- Patients must have a diagnosis of bipolar I disorder and currently display an acute manic or mixed episode (with or without psychotic features) according to the DSM-IV based on clinical assessment and confirmed by structured diagnostic interview SCID-P. This includes the following diagnoses: 296.4x, Bipolar I Disorder, Most Recent Episode Manic; 296.6x, Bipolar I Disorder, Most Recent Episode Mixed.
Show all 11Show fewer
- Patients must have a YMRS total score of greater than or equal to 14 at both Visits 1 and 2.
- No decrease in total score of YMRS of greater than or equal to 20% during washout (between Visits 1 and 2).
- DSM-IV rapid cyclers will be permitted to participate in this study.
- Duration of current manic episode of not more than 4 weeks.
- Previous trial with any one of the following antimanic agents: lithium, valproate, carbamazepine, oxcarbazepine, typical antipsychotic drug, or atypical antipsychotic drug (olanzapine, risperidone, ziprasidone, aripiprazole, quetiapine). If the subject has not previously taken one of these antimanic treatments, then the research physician may start one of them at NIH. Subjects not responding to a 3 week trial of an antimanic agent of their choice (at least a 50% decrease on the YMRS rating scale from baseline) will be eligible to be randomized if they continue to meet study criteria.
Who cannot join
- Patients will be excluded from the study for any of the following reasons:
- Female patients who are either pregnant, nursing, or who are perimenopausal or postmenopausal.
- QTc of greater than 450 msec.
- Participation in a clinical trial of another investigational drug within 1 month (30 days) prior to study entry (Visit 1).
- Has received an antidepressant within 4 weeks prior to Visit 1 [8 weeks for fluoxetine].
- Serious, unstable illnesses including hepatic, renal, gastroenterologic, respiratory, cardiovascular (including ischemic heart disease), endocrinologic, neurologic, immunologic, or hematologic disease.
Show all 23Show fewer
- Presence of a coagulation disorder, history of deep venous thrombosis or pulmonary embolism.
- History of breast or uterine cancer, or abnormal uterine bleeding.
- Uncorrected hypothyroidism or hyperthyroidism.
- Presence of retinal pathology.
- One or more seizures without a clear and resolved etiology.
- Current leukopenia or thrombocytopenia.
- Clinical significant abnormal laboratory tests.
- Documented history of hypersensitivity or intolerance to TAM.
- DSM-IV substance abuse or dependence (except nicotine and caffeine) within the past 30 days.
- Treatment with an injectable depot neuroleptic within less than one dosing interval between depot neuroleptic injections prior to Visit 2.
- Treatment with a reversible monoamine oxidase inhibitor, guanethidine, or guanadrel within 1 week prior to Visit 2.
- Treatment with a nonreversible monoamine oxidase inhibitor within 2 weeks prior to Visit 2.
- Treatment with any other concomitant medication with primarily CNS activity, other than specified in Appendix B of Protocol 1 day prior to Visit 2.
- Treatment with clozapine within 4 weeks prior to Visit 2.
- Current diagnosis of schizophrenia or other psychotic disorder as defined in the DSM-IV.
- Judged clinically to be at serious suicidal risk.
- Concomitant treatment with a coumarin-type anticoagulant, phenobarbital, cyclophosphamide, or bromocriptine.
Trial locations and contacts
1 site in 1 country.
United States1 site
Howard University Hospital
Washington D.C., District of Columbia, 20060
About this study
Official title: A Double-Blind Study Examining the Efficacy of the Protein Kinase C Inhibitor Tamoxifen in the Treatment of Acute Mania
The purpose of this study is to examine how the drug tamoxifen affects the brain in patients with bipolar I disorder.
Bipolar Disorder (BD) is a severe, chronic, and often life-threatening illness for which safe and effective treatments are necessary. The mood stabilizing effects of lithium and valproate have revolutionized the treatment of patients with BD. However, a significant percentage of patients do not respond fully to these drugs, and the biochemical basis for the antimanic and mood-stabilizing actions of lithium and valproate is unclear. Both drugs inhibit protein kinase C (PKC). There is a need to investigate the efficacy of a direct PKC inhibitor in the treatment of acute mania. Tamoxifen is currently the only relatively selective PKC inhibitor available for human use.
Read more
Participants in this study will be screened with a physical, psychiatric, and eye examination and blood and urine tests. Eligible participants will be hospitalized at the Clinical Center for at least 4 weeks. They will be tapered off all psychiatric medication and kept drug free for 2 to 7 days. They will also be put on a low-monoamine, low-caffeine diet. Participants will be randomly assigned to receive either tamoxifen or placebo (an inactive pill) for 3 weeks. During this time, participants will have daily pulse and blood pressure measurements, several electrocardiograms (EKGs), and blood draws. Weight measurements will be taken at least twice during the study, and caffeine or dextromethorphan will be given at the beginning and end of the study to test how tamoxifen affects the way the body eliminates other medications. Participants will have a physical examination at the end of the study.
At the end of this 4-week study, some participants may continue the study and will receive tamoxifen for an additional 3 weeks. At the conclusion of the study, participants' psychiatric status will be reassessed and long-term psychiatric treatment for their mood disorders will be arranged.
Read the detailed description
Bipolar Disorder (BD) is a common, severe, chronic and often life-threatening illness. Suicide is the cause of death in 10-20% of individuals with BD. The discovery of lithium's efficacy as a mood-stabilizing agent has since revolutionized the treatment of patients with BD. However, approximately 50% of patients do not respond fully to lithium, and the biochemical basis for lithium's antimanic and mood-stabilizing actions remains to be fully elucidated. Elucidation of the mechanism(s) by which lithium stabilizes an underlying dysregulation of limbic and limbic-associated function also offers the potential to delineate the underlying pathophysiology of BD; however, a major problem inherent in neuropharmacologic research is the difficulty in attributing therapeutic relevance to any observed biochemical finding. One powerful approach is to identify common biochemical targets, which are modified by drugs belonging to the same therapeutic class (e.g. mood-stabilizing agents) but possessing distinct chemical structures when administered in a therapeutically relevant paradigm (i.e., effects which are observed upon chronic drug administration, and yet persist beyond abrupt drug discontinuation). In this context, it is noteworthy that both valproic acid (VPA) and lithium, with different chemical structures, belong to the same therapeutic class and cause considerable inhibition of protein kinase C (PKC). The PKC signaling pathway is clearly a target for the actions of two structurally highly dissimilar antimanic agents -- lithium and VPA. Do these effects of lithium and VPA on PKC signaling have any clinical relevance? There is thus a clear need to investigate the potential efficacy of a direct PKC inhibitor in the treatment of acute mania. There is currently only one relatively selective PKC inhibitor available for human use- Tamoxifen. Tamoxifen (TAM), a synthetic nonsteroidal antiestrogen, has been widely used in the treatment of breast cancer. TAM's potent inhibitory effects on PKC are striking. Recently, our group conducted the first open-label study with TAM in acute mania. In this study, TAM resulted in a significant decrease in manic symptoms within a short period of time (3-7 days).
The overarching goal of this proposal is to test the hypothesis that PKC inhibition is part of the mechanism of the therapeutic effect of mood stabilizing drugs. The proposal derives from and builds on our published open-label study of TAM in acute mania (Bebchuk et al., 2000). However, the efficacy of TAM monotherapy in acute mania has only been reported in an open-label study and has not yet been evaluated in a randomized, double blind, placebo-controlled study.
Male or female patients, ages 18 to 65, with a diagnosis of bipolar I disorder manic or mixed (with or without psychotic features), will be randomized to double-blind treatment to receive either TAM (20-140 mg/day) or placebo, for a period of 3 weeks. Following this acute period, the patients will receive either open-label TAM or treatment as clinically indicated. Approximately 50 patients with acute mania will be enrolled in the study. Biochemical measures will be obtained during the study.
- Conditions
- Bipolar Disorder
- Being tested
- Tamoxifen
- Keywords
- Bipolar Disorder, Antimanic, Placebo Controlled, Randomized, Cytochrome P450, Mania, PKC Inhibitor, Tamoxifen, Bipolar, Manic, BPD
- Medical subject headings
- Bipolar Disorder, Mania
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
TamoxifenDrug
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted12 Nov 2001 (estimated)
- Study start9 Nov 2001
- Study completion2 Nov 2007
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 Bipolar DisorderStudies of the same condition, open and under way.
- More trials run by National Institute of Mental Health (NIMH)The 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 2
- Primary purpose
- Treatment
- Enrolment
- 50 participants
Sponsor and investigators
- Lead sponsor
- National Institute of Mental Health (NIMH)
- Sponsor type
- US National Institutes of Health
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00026585
- Sponsor's protocol ID
- 020037
- Other IDs
- 02-M-0037
- Status last verified
- 20 May 2008
- First submitted
- 10 Nov 2001
- Last updated
- 2 Jul 2017
- Results posted
- No
Publications
Alfaro CL, Lam YW, Simpson J, Ereshefsky L. CYP2D6 status of extensive metabolizers after multiple-dose fluoxetine, fluvoxamine, paroxetine, or sertraline. J Clin Psychopharmacol. 1999 Apr;19(2):155-63. doi: 10.1097/00004714-199904000-00011.
PubMed 10211917
Study at a glance
From the registry record, last updated by the sponsor on 2 Jul 2017. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Double-Blind Study Examining the Efficacy of the Protein Kinase C Inhibitor Tamoxifen in the Treatment of Acute Mania
- ClinicalTrials.gov ID
- NCT00026585
- Acronym / sponsor ID
- 020037
- Conditions
- Bipolar Disorder
- Keywords
- Bipolar Disorder, Antimanic, Placebo Controlled, Randomized, Cytochrome P450, Mania, PKC Inhibitor, Tamoxifen
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 50 participants
- Lead sponsor
- National Institute of Mental Health (NIMH)US National Institutes of Health
- Study start
- 9 Nov 2001
- Study completion
- 2 Nov 2007
- First posted
- 12 Nov 2001 (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.
The purpose of this study is to examine how the drug tamoxifen affects the brain in patients with bipolar I disorder.
Bipolar Disorder (BD) is a severe, chronic, and often life-threatening illness for which safe and effective treatments are necessary. The mood stabilizing effects of lithium and valproate have revolutionized the treatment of patients with BD. However, a significant percentage of patients do not respond fully to these drugs, and the biochemical basis for the antimanic and mood-stabilizing actions of lithium and valproate is unclear. Both drugs inhibit protein kinase C (PKC). There is a need to investigate the efficacy of a direct PKC inhibitor in the treatment of acute mania. Tamoxifen is currently the only relatively selective PKC inhibitor available for human use.
Participants in this study will be screened with a physical, psychiatric, and eye examination and blood and urine tests. Eligible participants will be hospitalized at the Clinical Center for at least 4 weeks. They will be tapered off all psychiatric medication and kept drug free for 2 to 7 days. They will also be put on a low-monoamine, low-caffeine diet. Participants will be randomly assigned to receive either tamoxifen or placebo (an inactive pill) for 3 weeks. During this time, participants will have daily pulse and blood pressure measurements, several electrocardiograms (EKGs), and blood draws. Weight measurements will be taken at least twice during the study, and caffeine or dextromethorphan will be given at the beginning and end of the study to test how tamoxifen affects the way the body eliminates other medications. Participants will have a physical examination at the end of the study.
At the end of this 4-week study, some participants may continue the study and will receive tamoxifen for an additional 3 weeks. At the conclusion of the study, participants' psychiatric status will be reassessed and long-term psychiatric treatment for their mood disorders will be arranged.
Detailed description
Bipolar Disorder (BD) is a common, severe, chronic and often life-threatening illness. Suicide is the cause of death in 10-20% of individuals with BD. The discovery of lithium's efficacy as a mood-stabilizing agent has since revolutionized the treatment of patients with BD. However, approximately 50% of patients do not respond fully to lithium, and the biochemical basis for lithium's antimanic and mood-stabilizing actions remains to be fully elucidated. Elucidation of the mechanism(s) by which lithium stabilizes an underlying dysregulation of limbic and limbic-associated function also offers the potential to delineate the underlying pathophysiology of BD; however, a major problem inherent in neuropharmacologic research is the difficulty in attributing therapeutic relevance to any observed biochemical finding. One powerful approach is to identify common biochemical targets, which are modified by drugs belonging to the same therapeutic class (e.g. mood-stabilizing agents) but possessing distinct chemical structures when administered in a therapeutically relevant paradigm (i.e., effects which are observed upon chronic drug administration, and yet persist beyond abrupt drug discontinuation). In this context, it is noteworthy that both valproic acid (VPA) and lithium, with different chemical structures, belong to the same therapeutic class and cause considerable inhibition of protein kinase C (PKC). The PKC signaling pathway is clearly a target for the actions of two structurally highly dissimilar antimanic agents -- lithium and VPA. Do these effects of lithium and VPA on PKC signaling have any clinical relevance? There is thus a clear need to investigate the potential efficacy of a direct PKC inhibitor in the treatment of acute mania. There is currently only one relatively selective PKC inhibitor available for human use- Tamoxifen. Tamoxifen (TAM), a synthetic nonsteroidal antiestrogen, has been widely used in the treatment of breast cancer. TAM's potent inhibitory effects on PKC are striking. Recently, our group conducted the first open-label study with TAM in acute mania. In this study, TAM resulted in a significant decrease in manic symptoms within a short period of time (3-7 days).
The overarching goal of this proposal is to test the hypothesis that PKC inhibition is part of the mechanism of the therapeutic effect of mood stabilizing drugs. The proposal derives from and builds on our published open-label study of TAM in acute mania (Bebchuk et al., 2000). However, the efficacy of TAM monotherapy in acute mania has only been reported in an open-label study and has not yet been evaluated in a randomized, double blind, placebo-controlled study.
Male or female patients, ages 18 to 65, with a diagnosis of bipolar I disorder manic or mixed (with or without psychotic features), will be randomized to double-blind treatment to receive either TAM (20-140 mg/day) or placebo, for a period of 3 weeks. Following this acute period, the patients will receive either open-label TAM or treatment as clinically indicated. Approximately 50 patients with acute mania will be enrolled in the study. Biochemical measures will be obtained during the study.
Study design
- Primary purpose
- Treatment
Who may qualify
- Ages
- 18 to 65 years
- Sex
- Male only
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (11 listed)
- Male and female patients, 18 to 65 years of age. [Note: Only females who are premenopausal with regular menstrual cycles will be able to participate].
- Female subjects of childbearing potential must be using a medically accepted means of contraception.
- Each patient must have a level of understanding sufficient to agree to all tests and examinations required by the protocol.
- Each patient must understand the nature of the study and must sign an informed consent document. We will not permit patients with a Durable Power of Attorney (DPA) to participate in this study. We will however, encourage all patients to sign a DPA after signing the informed consent. However, signing a DPA is not a requirement for participating in this study.
- Patients must have a diagnosis of bipolar I disorder and currently display an acute manic or mixed episode (with or without psychotic features) according to the DSM-IV based on clinical assessment and confirmed by structured diagnostic interview SCID-P. This includes the following diagnoses: 296.4x, Bipolar I Disorder, Most Recent Episode Manic; 296.6x, Bipolar I Disorder, Most Recent Episode Mixed.
Key exclusion criteria (23 listed)
- Female patients who are either pregnant, nursing, or who are perimenopausal or postmenopausal.
- QTc of greater than 450 msec.
- Participation in a clinical trial of another investigational drug within 1 month (30 days) prior to study entry (Visit 1).
- Has received an antidepressant within 4 weeks prior to Visit 1 [8 weeks for fluoxetine].
- Serious, unstable illnesses including hepatic, renal, gastroenterologic, respiratory, cardiovascular (including ischemic heart disease), endocrinologic, neurologic, immunologic, or hematologic disease.
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 |
|---|---|---|
| Tamoxifen | Drug | – |
Primary outcome
Not reported in the source record.
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 2 Jul 2017.
- Background: PubMed 10211917Alfaro CL, Lam YW, Simpson J, Ereshefsky L. CYP2D6 status of extensive metabolizers after multiple-dose fluoxetine, fluvoxamine, paroxetine, or sertraline. J Clin Psychopharmacol. 1999 Apr;19(2):155-63. doi: 10.1097/00004714-199904000-00011.
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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.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing Tamoxifen in people with Bipolar Disorder, run by National Institute of Mental Health (NIMH) at 1 site in United States.
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 11 inclusion and 23 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 2 Jul 2017. 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 United States. 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 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
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.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT00026585, 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 2 Jul 2017.