Ibandronate or Zoledronate in Treating Patients With Newly Diagnosed Bone Metastases From Breast Cancer

Study Overview
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Brief Summary
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RATIONALE: Ibandronate and zoledronate may help relieve some of the symptoms caused by bone metastases. It is not yet know whether ibandronate is more effective than zoledronate in treating bone metastases from breast cancer. PURPOSE: This randomized phase III trial is studying ibandronate to see how well it works compared with zoledronate in treating patients with newly diagnosed bone metastases from breast cancer.

Detailed Description
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OBJECTIVES: Primary Compare the efficacy, in terms of reducing frequency and timing of skeletal-related events (SREs), of ibandronate vs zoledronate in patients with newly diagnosed bone metastases secondary to breast cancer. Secondary Compare the median time to first SRE in patients treated with these regimens. Compare the percentage of patients experiencing a SRE after treatment with these regimens. Compare the number of occult vertebral fractures present in patients at the end of treatment with these regimens. Compare the pain and analgesic scores and quality of life of patients treated with these regimens. Compare the number of patients developing renal dysfunction or hypocalcemia during the study period. Compare the number of patients developing osteonecrosis of the jaw during study treatment and follow-up. Compare the overall survival of these patients at 96 weeks and at 5 years. Compare the health-resource usage of patients treated with these regimens. OUTLINE: This is a randomized, open-label, parallel-group, controlled, multicenter study. Patients are randomized to 1 of 2 treatment arms. Arm I: Patients receive zoledronate IV over 15 minutes on day 1. Treatment repeats every 21* or 28 days for at least 96 weeks (24 or 32 courses) in the absence of disease progression or unacceptable toxicity. NOTE: *Patients who receive concurrent chemotherapy every 3 weeks receive study treatment every 21 days Arm II: Patients receive oral ibandronate once daily on days 1-28. Treatment repeats every 28 days for at least 96 weeks (24 courses) in the absence of disease progression or unacceptable toxicity. Patients with bone pain or hypercalcemia at study entry or those who require IV therapy due to hypercalcemia while on study may receive 1 treatment with ibandronate IV at the discretion of the supervising clinician. Quality of life and pain are assessed at baseline, after every 3 courses, and at completion of study treatment. After completion of study treatment, patients are followed annually for up to 3 years. PROJECTED ACCRUAL: A total of 1,400 patients will be accrued for this study.

Official Title
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Zoledronate Versus Ibandronate Comparative Evaluation: A Randomized Phase III, Open-Label, Multicenter, Parallel Group Clinical Trial to Evaluate and Compare the Efficacy, Safety Profile and Tolerability of Oral Ibandronate Versus Intravenous Zoledronate in the Treatment of Breast Cancer Patients With Bone Metastases

Conditions
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Breast Cancer, Hypercalcemia of Malignancy, Metastatic Cancer

Intervention / Treatment
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* Drug: ibandronate sodium
* Drug: zoledronic acid
* Drug: Zolendronic Acid


Participation Criteria
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Eligibility Criteria
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DISEASE CHARACTERISTICS: Histologically proven breast cancer Metastatic disease Previous relapsed disease in sites other than bone allowed Newly diagnosed multiple bone metastases within the past 3 months, meeting all of the following criteria: Painful or asymptomatic Lytic, mixed, or purely sclerotic type Radiological diagnosis IV bisphosphonate therapy indicated No CNS metastases Hormone receptor status not specified PATIENT CHARACTERISTICS: ECOG performance status 0-2 Male or female Menopausal status not specified No known active peptic ulcer Not pregnant or nursing Fertile patients must use effective contraception No active dental problems, including infection of the teeth or jawbone (maxilla or mandible) or dental or fixture trauma No prior or current diagnosis of osteonecrosis of the jaw, exposed bone in the mouth, or slow healing after dental procedures Creatinine clearance ≥ 30 mL/min Bilirubin ≤ 1.5 x upper limit of normal (ULN) AST and ALT ≤ 1.5 times ULN No history of bisphosphonate hypersensitivity Able to comply with instructions relating to oral study medications Able to take oral study medications No psychiatric illness or other condition that would preclude giving informed consent PRIOR CONCURRENT THERAPY: At least 6 months since prior bisphosphonate therapy At least 6 weeks since prior and no concurrent dental or jaw surgery (e.g., extractions or implants) Concurrent unplanned dental extractions allowed provided study medication is discontinued for 8 weeks before and after the surgery Concurrent chemotherapy and/or hormone therapy for metastatic disease allowed No concurrent medications that affect bone metabolism (e.g., calcitonin or other nontrial bisphosphonates)

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

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: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Ibandronic Acid<br>50mg tablet once daily over 96 weeks | Drug: ibandronate sodium<br> <br> |
| Active Comparator: Zoledronic Acid<br>4 mg via intravenous infusion (iv) over a minimum of 15 minutes in at least 100mls of saline every 4 weeks over 96 weeks | Drug: zoledronic acid<br> <br> Drug: Zolendronic Acid<br>* Zoledronic acid 4 mg by intravenous infusion every 4 weeks.<br>* Other names: Zoledronate;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Frequency and timing of skeletal-related events (SREs) |  | 96 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Time to first SREs |  | 96 Weeks | 
| Proportion of patients with SREs |  | 96 Weeks | 
| Pain and analgesic score |  | 96 weeks | 
| Quality of life |  | 96 weeks | 
| Toxicity |  | 96 weeks | 
| Survival |  | 5 years | 
| Health resource usage and serum bone marker levels |  | 96 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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hypercalcemia of malignancy, stage IV breast cancer, bone metastases, recurrent breast cancer, male breast cancer