E.1 Medical condition or disease under investigation |
E.1.1 | Medical condition(s) being investigated |
prevention of tumortherapy-induced bone loss |
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MedDRA Classification |
E.1.2 Medical condition or disease under investigation |
E.1.2 | Version | 8.0 |
E.1.2 | Level | LLT |
E.1.2 | Classification code | 10049470 |
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E.1.3 | Condition being studied is a rare disease | No |
E.2 Objective of the trial |
E.2.1 | Main objective of the trial |
It is the aim of this study to show superiority of Zoledronic acid in prevention of bone loss, administered in combination with Letrozole as extended adjuvant therapy of postmenopausal women with primary hormone receptor positive breast cancer compared to Letrozole alone.
Primary efficacy variable: Treatment difference in change in BMD measured by DXA in lumbar spine (L1-L4) at 36 months as compared to baseline. |
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E.2.2 | Secondary objectives of the trial |
To compare the combined treatment of Letrozole and Zoledronic acid with Letrozole monotherapy with respect to · BMD (measured by DXA at lumbar spine, L1-L4), at 12 months · Fracture rate · Disease free survival (DFS) · Safety and tolerability |
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E.2.3 | Trial contains a sub-study | No |
E.3 | Principal inclusion criteria |
To be eligible for the study a patient must fulfill all of the following criteria: · Signed informed consent · Age > 18 years · Performance status 0-2 (ECOG) · Compliant postmenopausal women. Postmenopausal is defined as one of the following: · Age >55 years with cessation of menses. · Age <55 but no spontaneous menses for at least 1 year. · Age <55 and spontaneous menses within the past 1 year, but currently amenorrheic (e.g., spontaneous, or secondary to hysterectomy), and with postmenopausal gonadotrophin levels (luteinizing hormone and follicle stimulating hormone levels >40 IU/L) or postmenopausal estradiol levels (<5ng/dL) or according to the definition of “postmenopausal range” for the laboratory involved. · Histologically confirmed primary operable breast cancer after 4 to 6 years of therapy with Tamoxifen (end of Tamoxifen therapy within last 6 months) · Nodal status positive or negative · ER and/or PgR positive Hormone receptor positive defined as ER and/or PgR equal or higher 10 fmol/mg cytosol protein; or equal or higher 10% of the tumor cells positive by immunohistochemical evaluation) · Patients with a baseline lumbar spine BMD T-score at or above - 2.0 SD. · No evidence of relapse at the time of randomization · Adequate marrow function (WBC > 3.0 x 10e9/L, platelets > 100.0 x 10e9/L, and hemoglobin > 10 g/dL) · Adequate hepatic function (bilirubin < 30 µmol/L, ALT (SGPT) or AST (SGOT) < 1.5 x UNL of the institution). |
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E.4 | Principal exclusion criteria |
To be eligible for the study a patient must not fulfill any of the following criteria: · ER and PgR negative or unknown · End of adjuvant Tamoxifen therapy more that 6 months before study beginning · Chemotherapy within the last 12 months before randomization · Inflammatory breast cancer · Abnormal renal function as evidenced by a calculated creatinine clearance < 30 ml/minute. Creatinine clearance (CrCl) is calculated using the Cockcroft-Gault formula: CrCl= [140-age (years)] x weight (kg) / [72 x serum creatinine (mg/dL)] x {0.85 for female patients} · Current active dental problems including infection of the teeth or jawbone (maxilla or mandibular); dental or fixture trauma, or a current or prior diagnosis of osteonecrosis of the jaw (ONJ), of exposed bone in the mouth, or of slow healing after dental procedures. · Recent (within 6 weeks) or planned dental or jaw surgery (e.g.. extraction, implants) · History of diseases with influence on bone metabolism such as Paget’s disease and primary hyperparathyroidism · Known hypersensitivity to Zometa® (Zoledronic acid) or other bisphosphonates · Patients with any clinical or radiological evidence of distant spread of their disease at any point before randomization. · Patients with any clinical or radiological evidence of existing fracture in the lumbar spine. · Patients with a history of fracture with low-density or no associated trauma. · Patients who have received prior treatment with intravenous bisphosphonates within the past 12 months. · Patients currently receiving oral bisphosphonates. Oral bisphosphonates must be discontinued within 3 weeks of baseline evaluations. · Patients who have received prior treatment with systemic corticosteroids within the past 12 months (short term corticosteroid therapy is allowed). · Patients with prior exposure to anabolic steroids or growth hormone or Tibolone within the past 6 months. · Any prior use of parathyroid hormone (PTH) for more than 1 week. · Prior use of systemic sodium fluoride for > 3 months during the past 2 years. · Patients currently treated with any drugs known to affect the skeleton (e.g., calcitonin, mithramycin, or gallium nitrate) within 2 weeks prior to randomization. · Patients with previous or concomitant malignancy (not breast cancer) within the past 5 years EXCEPT adequately treated basal or squamous cell carcinoma of the skin or in situ carcinoma of the cervix. Patients who have had a previous other malignancy must have been disease-free for five years. · Patients with other non-malignant systemic diseases including uncontrolled infections, uncontrolled type 2 diabetes mellitus, uncontrolled thyroid dysfunction, cardiovascular, renal, hepatic, and lung diseases which would prevent prolonged follow-up. Patients with previous history of thrombosis or thromboembolism can be included only if medically suitable. Patients with a known history of HIV are excluded. · Severe physical or psychological concomitant diseases that might impair compliance with the provisions of the study protocol or that might impair the assessment of drug or patient safety, e.g. clinically significant ascites, cardiac failure, NYHA III or IV, clinically relevant pathologic findings in ECG · Uncontrolled seizure disorders associated with falls. · History of diseases with influence on bone metabolism, such as Paget’s disease, Osteo-genesis Imperfecta, and primary or secondary hyperthyroidism within the 12 months prior to study entry. · Patients with baseline lumbar spine BMD T-score below –2.0 SD. · Patients treated with systemic investigational drug(s) and/or device(s) within the past 30 days or topical investigational drugs within the past 7 days. · History of non-compliance to medical regimens and patients who are considered potentially unreliable. · Mental illness that precludes the patient from giving informed consent.
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E.5 End points |
E.5.1 | Primary end point(s) |
Treatment difference in change in BMD measured by DXA in lumbar spine (L1-L4) at 36 months as compared to baseline. |
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E.6 and E.7 Scope of the trial |
E.6 | Scope of the trial |
E.6.1 | Diagnosis | No |
E.6.2 | Prophylaxis | No |
E.6.3 | Therapy | Yes |
E.6.4 | Safety | Yes |
E.6.5 | Efficacy | Yes |
E.6.6 | Pharmacokinetic | No |
E.6.7 | Pharmacodynamic | No |
E.6.8 | Bioequivalence | No |
E.6.9 | Dose response | No |
E.6.10 | Pharmacogenetic | No |
E.6.11 | Pharmacogenomic | No |
E.6.12 | Pharmacoeconomic | No |
E.6.13 | Others | No |
E.7 | Trial type and phase |
E.7.1 | Human pharmacology (Phase I) | No |
E.7.1.1 | First administration to humans | No |
E.7.1.2 | Bioequivalence study | No |
E.7.1.3 | Other | No |
E.7.1.3.1 | Other trial type description | |
E.7.2 | Therapeutic exploratory (Phase II) | No |
E.7.3 | Therapeutic confirmatory (Phase III) | Yes |
E.7.4 | Therapeutic use (Phase IV) | No |
E.8 Design of the trial |
E.8.1 | Controlled | Yes |
E.8.1.1 | Randomised | Yes |
E.8.1.2 | Open | Yes |
E.8.1.3 | Single blind | No |
E.8.1.4 | Double blind | No |
E.8.1.5 | Parallel group | Yes |
E.8.1.6 | Cross over | No |
E.8.1.7 | Other | No |
E.8.2 | Comparator of controlled trial |
E.8.2.1 | Other medicinal product(s) | No |
E.8.2.2 | Placebo | No |
E.8.2.3 | Other | No |
E.8.3 |
The trial involves single site in the Member State concerned
| No |
E.8.4 | The trial involves multiple sites in the Member State concerned | Yes |
E.8.5 | The trial involves multiple Member States | No |
E.8.6 Trial involving sites outside the EEA |
E.8.6.1 | Trial being conducted both within and outside the EEA | No |
E.8.6.2 | Trial being conducted completely outside of the EEA | Information not present in EudraCT |
E.8.7 | Trial has a data monitoring committee | No |
E.8.8 |
Definition of the end of the trial and justification where it is not the last
visit of the last subject undergoing the trial
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The end of trial is defined as the last visit of the last subject undergoing the trial. |
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E.8.9 Initial estimate of the duration of the trial |
E.8.9.1 | In the Member State concerned years | 5 |
E.8.9.1 | In the Member State concerned months | 0 |
E.8.9.1 | In the Member State concerned days | |
E.8.9.2 | In all countries concerned by the trial years | 5 |
E.8.9.2 | In all countries concerned by the trial months | 0 |