Breast CancerPhase 2NCT00200824
Effects of Soy Compounds on Breast Cancer, Prostate Cancer, and Bone Health
A Phase 2 study testing Soy Isoflavone Nutritional Supplements in people with Breast Cancer and Prostate Cancer, run by National Center for Complementary and Integrative Health (NCCIH) at 1 site in United States.
Trial summary
This study will determine the effects of soy products on in vitro surrogate cancer markers as well as bone density markers and quality of life parameters in men and women. This study will also determine concentrations of isoflavones (naturally occurring plant compounds that act like estrogen in the body) in prostate… Read more about this study
- Who is it for?
- Any ageHealthy volunteers can take part
- Conditions the study is for
- Breast Cancer, Prostate Cancer
- What is being tested?
- Soy Isoflavone Nutritional Supplements
- How many people
- Not given
- Where
- 1 siteUnited States
- Study dates
- May 2000to Jan 2005
- 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 Any age
- All sexes
- Healthy volunteers accepted
- Child, Adult, Older adult
Who may be able to join
- Scheduled for prostatectomy
- Willing and able to consume study tablets for at least 2 weeks prior to surgery
- Willing to accept random assignment
- Signed informed consent
Who cannot join
- Unwilling to avoid soy intake during the study period
- Currently taking antibiotics
Trial locations and contacts
1 site in 1 country.
United States1 site
Christopher Gardner
Stanford, California, 94305-5705
About this study
Official title: Effects of Soy Isoflavones on the Prostate, Breast and Bone
This study will determine the effects of soy products on in vitro surrogate cancer markers as well as bone density markers and quality of life parameters in men and women. This study will also determine concentrations of isoflavones (naturally occurring plant compounds that act like estrogen in the body) in prostate tissue that has been removed during prostatectomy, as well as in the blood.
Read the detailed description
In the United States, consumption of soy products has dramatically increased in the past several years. Foods made from soy are high in isoflavones and evidence suggests that these isoflavones, genistein in particular, have many beneficial properties such as alleviating menopausal side effects and reducing the risk of osteoporosis, breast cancer, and prostate cancer. However, this data has been derived largely from studies with animal or cell models; human trials are limited. This study will determine the effects of soy isoflavones on quality of life and cancer and bone density markers.
While isoflavones have been purported to inhibit the proliferation of cancer cells, the concentrations required for this anti-cancer effect were determined to be much higher than the concentrations that can be achieved in plasma after intake of isoflavones. Recent animal studies have suggested that isoflavones may be concentrated 10-fold in tissue compared to blood concentrations. If this is true, then the higher concentration would be in the range found in the cancer cell line research to be protective of cancer. This study will determine whether tissue concentrations are similar to, higher than, or different than blood concentrations.
This study will last 5 years and will comprise three populations: men with prostate cancer on androgen ablation therapy, postmenopausal women on hormone replacement therapy (HRT), and postmenopausal women not on HRT. Participants will be randomly assigned to receive either isoflavone or placebo for two to four weeks. Participants' serum and serum extracts will be incubated with cultured human cell lines (prostate cancer, breast cancer and osteoblasts) and estrogenic and non-estrogenic mechanisms of action investigated. The human sera data will be complemented by parallel studies of direct addition of crystalline isoflavones (genistein, daidzein and equol) to the same cultured human cell lines. Participant's serum and urine also will be tested for markers of bone resorption and formation. Quality of life issues will be assessed with questionnaires.
- Conditions
- Breast Cancer, Prostate Cancer
- Being tested
- Soy Isoflavone Nutritional Supplements
- Keywords
- isoflavones, soy, postmenopausal, men, prostate, breast, bone
- Medical subject headings
- Breast Neoplasms, Prostatic Neoplasms, Multiple Endocrine Neoplasia Type 1
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Soy Isoflavone Nutritional SupplementsDrug
What is being measured
The primary outcome is the main question the study is designed to answer.
Markers of Bone Density
Basic Science (e.g., proliferation of cancer cells in vitro)
Secondary outcomes (1)
Bioavailability
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted20 Sep 2005 (estimated)
- Study startMay 2000
- Study completionJan 2005
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Breast CancerStudies 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
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Double blind
Sponsor and investigators
- Lead sponsor
- National Center for Complementary and Integrative Health (NCCIH)
- Sponsor type
- US National Institutes of Health
- Investigators
- Christopher Gardner, Principal investigator, Stanford University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00200824
- Sponsor's protocol ID
- R01AT000486
- Status last verified
- Aug 2006
- First submitted
- 13 Sep 2005
- Last updated
- 12 Mar 2009
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 12 Mar 2009. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of Soy Isoflavones on the Prostate, Breast and Bone
- ClinicalTrials.gov ID
- NCT00200824
- Acronym / sponsor ID
- R01AT000486
- Conditions
- Breast Cancer, Prostate Cancer
- Keywords
- isoflavones, soy, postmenopausal, men, prostate, breast, bone
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Lead sponsor
- National Center for Complementary and Integrative Health (NCCIH)US National Institutes of Health
- Study start
- May 2000
- Study completion
- Jan 2005
- First posted
- 20 Sep 2005 (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.
This study will determine the effects of soy products on in vitro surrogate cancer markers as well as bone density markers and quality of life parameters in men and women. This study will also determine concentrations of isoflavones (naturally occurring plant compounds that act like estrogen in the body) in prostate tissue that has been removed during prostatectomy, as well as in the blood.
Detailed description
In the United States, consumption of soy products has dramatically increased in the past several years. Foods made from soy are high in isoflavones and evidence suggests that these isoflavones, genistein in particular, have many beneficial properties such as alleviating menopausal side effects and reducing the risk of osteoporosis, breast cancer, and prostate cancer. However, this data has been derived largely from studies with animal or cell models; human trials are limited. This study will determine the effects of soy isoflavones on quality of life and cancer and bone density markers.
While isoflavones have been purported to inhibit the proliferation of cancer cells, the concentrations required for this anti-cancer effect were determined to be much higher than the concentrations that can be achieved in plasma after intake of isoflavones. Recent animal studies have suggested that isoflavones may be concentrated 10-fold in tissue compared to blood concentrations. If this is true, then the higher concentration would be in the range found in the cancer cell line research to be protective of cancer. This study will determine whether tissue concentrations are similar to, higher than, or different than blood concentrations.
This study will last 5 years and will comprise three populations: men with prostate cancer on androgen ablation therapy, postmenopausal women on hormone replacement therapy (HRT), and postmenopausal women not on HRT. Participants will be randomly assigned to receive either isoflavone or placebo for two to four weeks. Participants' serum and serum extracts will be incubated with cultured human cell lines (prostate cancer, breast cancer and osteoblasts) and estrogenic and non-estrogenic mechanisms of action investigated. The human sera data will be complemented by parallel studies of direct addition of crystalline isoflavones (genistein, daidzein and equol) to the same cultured human cell lines. Participant's serum and urine also will be tested for markers of bone resorption and formation. Quality of life issues will be assessed with questionnaires.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Double blind
Who may qualify
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult, Older adult
Key inclusion criteria (4 listed)
- Scheduled for prostatectomy
- Willing and able to consume study tablets for at least 2 weeks prior to surgery
- Willing to accept random assignment
- Signed informed consent
Key exclusion criteria (2 listed)
- Unwilling to avoid soy intake during the study period
- Currently taking antibiotics
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 |
|---|---|---|
| Soy Isoflavone Nutritional Supplements | Drug | – |
Primary outcome
Markers of Bone Density
Basic Science (e.g., proliferation of cancer cells in vitro)
1 secondary outcome
Bioavailability
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 Mar 2009.
Related trials for Breast Cancer
Active, not recruiting
Streamlined Geriatric and Oncological Evaluation Based On IC Technology
Breast Cancer, Comorbidities and Coexisting Conditions
RecruitingPhase 2
Gene Signatures to Guide HR+MBC Therapy in a Diverse Cohort
Invasive Mammary Carcinoma, Metastatic Breast Cancer
Not yet recruitingObservational study
Comparison of Reliability, Time Cost, and Participant Comfort of Lymphedema Assessments in Upper Extremity
Lymphedema, Upper Extremity Lymphedema
RecruitingPhase 3
A Study of Camrelizumab Plus Chemotherapy in Combination With or Without Famitinib as Neoadjuvant Therapy in Participants With Triple Negative Breast Cancer (BCTOP-T-N01)
TNBC - Triple-Negative Breast Cancer
RecruitingPhase 3
Testing Whether Hormone Therapy With Ribociclib is as Effective as Chemotherapy Followed by Hormone Therapy With Ribociclib for the Treatment of High Anatomic Stage Breast Cancer With Low Recurrence Risk, The RxFINE-Low Trial
Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage IIIA Breast Cancer AJCC v8
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.
Christopher Gardner principal investigator
Stanford University
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 Soy Isoflavone Nutritional Supplements in people with Breast Cancer and Prostate Cancer, run by National Center for Complementary and Integrative Health (NCCIH) 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 4 inclusion and 2 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 Mar 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 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.
What does the primary outcome measure?
Markers of Bone Density. The study lists 2 primary outcomes in all. 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 12 Mar 2009.