Soy, Selenium and Breast Cancer Risk
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Purpose
There is evidence to suggest that some dietary components can reduce the risk of breast cancer. In this pilot study two such components, isoflavones (compounds found in soy products) and selenium, will be given to women classed as at moderate to high risk of the disease. The aim is to determine some novel biomarkers of risk and to see the effect of supplementation on them.
| Condition | Intervention |
|---|---|
|
Breast Cancer Risk |
Dietary Supplement: Soy and Selenium |
| Study Type: | Interventional |
| Study Design: | Allocation: Randomized Intervention Model: Parallel Assignment Masking: Double Blind (Subject, Investigator) Primary Purpose: Prevention |
| Official Title: | A Pilot Study to Determine the Effect of Dietary Intervention on Novel Biomarkers of Breast Cancer Risk. |
- To determine the effect of supplementation with selenium and isoflavones on biomarkers of breast cancer risk. [ Time Frame: 25-35 days ] [ Designated as safety issue: No ]
- Identify novel biomarkers of breast cancer risk through metabolomic analysis of samples collect. [ Time Frame: 25-35 days ] [ Designated as safety issue: No ]
| Enrollment: | 27 |
| Study Start Date: | April 2007 |
| Study Completion Date: | August 2008 |
| Primary Completion Date: | May 2008 (Final data collection date for primary outcome measure) |
| Arms | Assigned Interventions |
|---|---|
|
Active Comparator: 1
6g of chocolate (supplemented with selenium and isoflavones) per day for the duration of one menstrual cycle (25-35 days)
|
Dietary Supplement: Soy and Selenium
6g of chocolate per day Control group with no supplementation Active group 50mg of soy protein isolate + 200µg selenium in the form of MSC
|
|
Placebo Comparator: 2
6g of chocolate (control) per day for the duration of one menstrual cycle (25-35 days)
|
Dietary Supplement: Soy and Selenium
6g of chocolate per day Control group with no supplementation Active group 50mg of soy protein isolate + 200µg selenium in the form of MSC
|
Detailed Description:
The high incidence of breast cancer, its relatively long development phase and the financial burden to the NHS in relation to treatment makes it a prime target for dietary preventative strategies. Epidemiological and experimental investigations suggest several key dietary components that may reduce breast cancer, in particular isoflavones and selenium. Few dietary intervention studies have been conducted to investigate putative protective effects, but with our growing understanding of cancer biology and the application of new -omics technologies it is now possible to use early biomarkers of risk to assess the potential efficacy of intervention studies.
In this pilot project, we will employ a combination of disciplines to examine the effect of dietary intervention in a group of women defined by NICE guidelines as being at increased risk (moderate-high) of developing breast cancer, using metabolomics to assess the tractability of biomarkers in response to the dietary intervention. Such trials are urgently needed to examine the protective effects of diet in women classified at increased risk and who are still in the 'zone of reversibility'. The results of this study will be used to justify and optimise larger scale intervention trials and ultimately to develop appropriate dietary recommendations for the prevention of breast cancer.
A dietary intervention study based on a randomised double-blind parallel design will be conducted in 30 pre-menopausal women (age 35-50) at moderate to high risk of developing breast cancer. The metabolomic profiles of urine and serum samples (collected at baseline and after dietary intervention) will be assessed. Participants will be randomised into two groups; the placebo group (consuming 6g of non-supplemented chocolate per day) and the supplemented group (consuming 6g of chocolate containing both soy and selenium per day). The intervention will last for the duration of one menstrual cycle.
Eligibility| Ages Eligible for Study: | 35 Years to 50 Years |
| Genders Eligible for Study: | Female |
| Accepts Healthy Volunteers: | Yes |
Inclusion Criteria:
- Pre menopausal women (age 35-50)at moderate to high risk of breast cancer based on family history (NICE guidelines)
- Attending Breast Clinic at NNUH
- Willing to consume 6g of chocolate per day for 25-35 days
- Regular menstrual cycle of 25-35 days in length
Exclusion Criteria:
- Current or previous diagnosis of breast cancer or cancer of any other site
- Diagnosis of hypertension (requiring active treatment)/diabetes/ coronary heart disease/ gastrointestinal disease/ any other systemic disease requiring treatment
- Regularly taking any prescribed medication within the last six months (including oral contraceptives)
- Fitted with a hormone releasing device
- Pregnant or lactating in the previous 12 months
- Using laxatives or antacids more than once a week
- Routinely taking soy or selenium supplements in the last twelve months
- Regularly taking any dietary or herbal supplements in the last six months
- Participation in any intervention study (soy or selenium) in the previous twelve months
- Parallel participation in another research study involving either dietary or medical intervention or sampling of biological fluids/materials
- Blood donation within sixteen weeks of study start/finish
- BMI <18.5 or >35
- Allergy to any chocolate/dairy/soy-based food products
Contacts and Locations| United Kingdom | |
| University of East Anglia | |
| Norwich, Norfolk, United Kingdom, NR47TJ | |
| Norfolk and Norwich University Hospital | |
| Norwich, Norfolk, United Kingdom, NR4 7UY | |
| Institute of Food Research | |
| Norwich, Norfolk, United Kingdom, NR4 7UA | |
| Principal Investigator: | Aedin Cassidy, PhD | University of East Anglia |
More Information
Publications:
| Responsible Party: | Professor Aedin Cassidy, University of East Anglia |
| ClinicalTrials.gov Identifier: | NCT00555386 History of Changes |
| Other Study ID Numbers: | R14697, 07/Q0101/10 |
| Study First Received: | November 7, 2007 |
| Last Updated: | September 24, 2008 |
| Health Authority: | United Kingdom: National Health Service United Kingdom: Research Ethics Committee |
Keywords provided by University of East Anglia:
|
Selenium Soy Breast Cancer Risk |
Additional relevant MeSH terms:
|
Breast Neoplasms Neoplasms by Site Neoplasms Breast Diseases Skin Diseases Selenium Trace Elements |
Micronutrients Growth Substances Physiological Effects of Drugs Pharmacologic Actions Antioxidants Molecular Mechanisms of Pharmacological Action Protective Agents |
ClinicalTrials.gov processed this record on May 19, 2013