Atrial FibrillationPhase 2NCT00309439
ALA and Prostate Cancer
A Phase 2 study testing ALA-rich diet in people with Atrial Fibrillation and Diet Therapy, run by University of Toronto.
Trial summary
The problem is the lack of data from randomized controlled trials to throw light on the ALA-prostate cancer issue. There is therefore a need to acquire evidence from a randomized controlled study to illustrate the effect of ALA on a surrogate marker for prostate cancer, namely prostate specific antigen (PSA). Read more about this study
- Who is it for?
- Ages 18 to 77 years
- Conditions the study is for
- Atrial Fibrillation, Diet Therapy, Prostate Cancer
- What is being tested?
- ALA-rich diet
- Type of treatment
- Surgery or procedure
- How many people
- Not given
- Where
- No sites listed yet
- Study dates
- Start not givento not given
- 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 77 years
- All sexes
- Adult, Older adult
Who may be able to join
- Blood samples available from Bordeaux
Who cannot join
- Blood samples not received from Bordeaux
About this study
Official title: Studies of Serum PSA to Help Resolve the Current Implication of Alpha-linolenic Acid (ALA) and Prostate Cancer
The problem is the lack of data from randomized controlled trials to throw light on the ALA-prostate cancer issue. There is therefore a need to acquire evidence from a randomized controlled study to illustrate the effect of ALA on a surrogate marker for prostate cancer, namely prostate specific antigen (PSA). Demonstration that atrial fibrillation recurrence was reduced after cardioversion and that there was no adverse effect of 1 years of ALA feeding on PSA would go a considerable way to providing the required evidence that ALA in the human diet has no adverse effect on the prostate and so allow its use for cardiovascular risk reduction. hypothesis: The effect of ALA on PSA levels over time will be no different from the control, so providing supportive data for the view that ALA is not cancer promoting.
Read the detailed description
In addition disturbing news on alpha-linolenic acid (ALA) has recently been reviewed by Brouwer and colleagues (J Nutr:2004). Their analyses suggests that ALA, as found in canola oil and other healthy foods, may cause prostate cancer even though there is good evidence that canola oil will prevent heart disease. This issue urgently needs further research.
In studies largely from the Harvard group, but suggested by additional studies from Uruguay and Spain, a link has been identified between ALA intake and prostate cancer. The Harvard studies are cohort studies where groups of approximately 40,000 doctors or health professionals have been followed up for periods of 10 years and the dietary intakes of ALA related to the subsequent development of aggressive prostate cancer. It must be stressed that these are not randomized crossover studies which are the currently accepted gold standard for evidence-based medicine and regulatory decision making. Nevertheless they raise concern over the health profile of a fatty acid with a growing reputation for cardiovascular disease prevention and a component of other healthy foods such as walnuts, flax, canola and soy.
The same Harvard group identified the deleterious effects on cardiovascular health of trans fatty acids in their cohort studies and this has resulted in a major effort to remove trans fatty acids from the food supply. On the other hand their identification of the benefits of vitamin E in their cohort studies has not been confirmed by subsequent randomized controlled trials. Although Dr Willett, the senior member of the Harvard group, has drawn surprisingly little attention to the negative findings with ALA, it remains a sticking point with regulators in the current debate over the inclusion and use of ALA in the food supply. This concern has been sufficient for the Natural Health Products Directorate of Health Canada to ask for a full proposal from us before we start studies on ALA in the prevention of atrial fibrillation due the apparently negative impact of ALA consumption on prostate cancer.
- Conditions
- Atrial Fibrillation, Diet Therapy, Prostate Cancer
- Being tested
- ALA-rich diet
- Medical subject headings
- Atrial Fibrillation, Prostatic Neoplasms
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
ALA-rich dietProcedure or surgery
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted31 Mar 2006 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Atrial FibrillationStudies 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 2
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
Sponsor and investigators
- Lead sponsor
- University of Toronto
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, David Jenkins, University of Toronto
- Investigators
- David JA Jenkins, Principal investigator, University of Toronto
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00309439
- Sponsor's protocol ID
- REB15636
- Status last verified
- Jun 2012
- First submitted
- 29 Mar 2006
- Last updated
- 13 Jun 2012
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 13 Jun 2012. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Studies of Serum PSA to Help Resolve the Current Implication of Alpha-linolenic Acid (ALA) and Prostate Cancer
- ClinicalTrials.gov ID
- NCT00309439
- Acronym / sponsor ID
- REB15636
- Conditions
- Atrial Fibrillation, Diet Therapy, Prostate Cancer
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Unknown status
- Lead sponsor
- University of TorontoUniversity, hospital or other
- First posted
- 31 Mar 2006 (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 problem is the lack of data from randomized controlled trials to throw light on the ALA-prostate cancer issue. There is therefore a need to acquire evidence from a randomized controlled study to illustrate the effect of ALA on a surrogate marker for prostate cancer, namely prostate specific antigen (PSA). Demonstration that atrial fibrillation recurrence was reduced after cardioversion and that there was no adverse effect of 1 years of ALA feeding on PSA would go a considerable way to providing the required evidence that ALA in the human diet has no adverse effect on the prostate and so allow its use for cardiovascular risk reduction. hypothesis: The effect of ALA on PSA levels over time will be no different from the control, so providing supportive data for the view that ALA is not cancer promoting.
Detailed description
In addition disturbing news on alpha-linolenic acid (ALA) has recently been reviewed by Brouwer and colleagues (J Nutr:2004). Their analyses suggests that ALA, as found in canola oil and other healthy foods, may cause prostate cancer even though there is good evidence that canola oil will prevent heart disease. This issue urgently needs further research.
In studies largely from the Harvard group, but suggested by additional studies from Uruguay and Spain, a link has been identified between ALA intake and prostate cancer. The Harvard studies are cohort studies where groups of approximately 40,000 doctors or health professionals have been followed up for periods of 10 years and the dietary intakes of ALA related to the subsequent development of aggressive prostate cancer. It must be stressed that these are not randomized crossover studies which are the currently accepted gold standard for evidence-based medicine and regulatory decision making. Nevertheless they raise concern over the health profile of a fatty acid with a growing reputation for cardiovascular disease prevention and a component of other healthy foods such as walnuts, flax, canola and soy.
The same Harvard group identified the deleterious effects on cardiovascular health of trans fatty acids in their cohort studies and this has resulted in a major effort to remove trans fatty acids from the food supply. On the other hand their identification of the benefits of vitamin E in their cohort studies has not been confirmed by subsequent randomized controlled trials. Although Dr Willett, the senior member of the Harvard group, has drawn surprisingly little attention to the negative findings with ALA, it remains a sticking point with regulators in the current debate over the inclusion and use of ALA in the food supply. This concern has been sufficient for the Natural Health Products Directorate of Health Canada to ask for a full proposal from us before we start studies on ALA in the prevention of atrial fibrillation due the apparently negative impact of ALA consumption on prostate cancer.
Study design
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
Who may qualify
- Ages
- 18 to 77 years
- Sex
- All
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- Blood samples available from Bordeaux
Key exclusion criteria (1 listed)
- Blood samples not received from Bordeaux
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 |
|---|---|---|
| ALA-rich diet | Procedure or surgery | – |
Primary outcome
Not reported in the source record.
Results and safety
Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 13 Jun 2012.
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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.
David JA Jenkins principal investigator
University of Toronto
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing ALA-rich diet in people with Atrial Fibrillation and Diet Therapy, run by University of Toronto.
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 1 inclusion and 1 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: status not confirmed, as of the sponsor's last update on 13 Jun 2012. Status can change between updates, so confirm with the study contact before making plans.
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?
Results are not available in the source record.
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?
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 13 Jun 2012.