The Prevention of Osteoporosis in Premenopausal and Newly Postmenopausal (Up to 8 Years) Women With Breast Cancer Following Chemotherapy (REBBeCA Study)

Study Overview
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Brief Summary
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The purpose of this study is to evaluate the effectiveness of once weekly risedronate in the prevention and treatment of bone loss in premenopausal and newly menopausal women with breast cancer who have received chemotherapy. The hypothesis is that bisphosphonate therapy will prevent bone loss at clinically relevant sites, such as the hip and spine. The investigators also hypothesize that there will be a correlation between biochemical markers of bone turnover and changes in bone mineral density.

Detailed Description
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Breast cancer is a significant public health problem accounting for approximately 30% of new cancers diagnosed annually. Much advancement has been made in the treatment of these cancers which has significantly decreased the mortality rates. Treatment, including adjuvant chemotherapy and hormonal therapy, prolongs disease free survival and overall survival of patients with breast cancer. The cytotoxic drugs, however, can cause premature ovarian failure and subsequent menopause. This risk has been reported to range from 53% to 89%. Temporary or permanent chemotherapy induced ovarian failure is important because of potential bone loss associated with the estrogen loss. Initiating a potent antiresorptive agent, risedronate, should prevent or improve bone mass in these women. Comparison: The investigators will compare bone mass/markers of study subjects receiving risedronate with study subjects receiving placebo. All subjects will be provided calcium and vitamin D supplementation as needed.

Official Title
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The Prevention of Osteoporosis in Premenopausal and Newly Postmenopausal (Up to 8 Years) Women With Breast Cancer Following Chemotherapy (REBBeCA Study)

Conditions
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Osteoporosis

Intervention / Treatment
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* Drug: risedronate (including placebo)


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Pre- and newly postmenopausal (up to 8 years) women ages 18 and older Breast cancer treated with chemotherapeutic agents, with or without tamoxifen/aromatase inhibitors Negative pregnancy test Exclusion Criteria: Stage 4 breast cancer Any illness or medications known to affect bone metabolism History of osteoporosis or history of vertebral or hip fractures Kidney stones in the past 5 years Active peptic ulcer disease

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Triple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Placebo Comparator: A<br>Group A will receive active study drug | Drug: risedronate (including placebo)<br>* risedronate 35mg weekly<br>* Other names: Actonel;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| That bone loss, as determined through BMD every six months, will be prevented at clinically relevant sites, such as the hip & spine, through the use of bisphosphonate therapy in study subjects. |  | 24 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| There will be a correlation between biochemical markers of bone turnover and changes in BMD. |  | 24 months |