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This is a multi-center, open label, uncontrolled, non-comparative phase I/II study in patients with refractory or relapsed multiple myeloma who are eligible for second, third, or fourth line therapy. Patients will be enrolled sequentially into four dose cohorts. The feasibility of administrating Revlimid (R) in combination with Doxorubicin and Dexamethasone (AD) and the MTD of the combination will be determined in the phase I part of the study (Part A). When the MTD has been established, the efficacy of the combination will be further evaluated in the phase II part of the study Part B)
Multiple myeloma is an incurable disease that is characterized by the malignant proliferation of plasma cells. It is the second most common hematological malignancy, is invariable fatal. The primary approach for treatment of multiple myeloma is systemic chemotherapy. Conventional chemotherapy with melphalan and prednisone (MP) has increased the survival from 12-17 months to approximately 3 years. But several other studies have shown that combination therapy with addition of other agents such as cyclophosphamide, nitroureas or anthracyclins does not improve the prognosis of patients with multiple myeloma. During the past few years it has been demonstrated that high dose chemotherapy followed by autologous stem cell transplantation can prolong the overall survival of myeloma patients and therefore became the standard of care for younger patients. Since it has been demonstrated that high dose chemotherapy is also well tolerated by the elderly high dose chemotherapy is recommended for patients up to an age of about 70 if there is no relevant comorbidity. Thus, the development of more effective regimens for the teatment of relapsed or refractory myeloma patients is urgently needed. Treatment with corticosteroids alone can induce responses in both primarily resistant and relapsed patients with myeloma. High pulse dexamethasone (40mg daily d1-4, 9-12 and 17-21) showed response rates of 27% in primarily unresponsive patients and 21% in relapsed patients, which were initially responsive. In combination with anthracyclins like in the VAD-regimen (vincristin, adriamycin, dexamethasone)response rates of about 31% were achieved in primary unresponsive patients whereas the response rate was 65% in patients who relapsed, but had previously responded to therapy. Thus, the combination of dexamethasone with anthracyclines and vincristin achieve a certain anti-myeloma activity in relapsed or refractory patients. Nevertheless due to the neurotoxicity, treatment with vincristin of elderly patients is critical and limited. Therefore substitution of vincristine by a less toxic agent with high anti-myeloma activity like the new thalidomide analogues (see below) could reduce toxicity and improve the therapeutic efficacy of anthracycline and dexamethasone containing regimens. Protocol DSMM VII Page 7/52 29.09.2004 Version 1.1 dexamethasone containing regimens. One interesting drug with substantial anti-myeloma activity in patients with relapsed or refractory myeloma is thalidomide. Thalidomide has been demonstrated to induce remissions in about one third of relapsed myeloma patients if given as a single agent therapy. Response rates evaluated in phase-II studies could be improved up to 55% if thalidomide was administered in combination with other drugs such as glucocorticoids. However substantial side effects were observed such as somnolence, constipation and neuropathy. These observations led to development of derivatives of thalidomide in order to reduce toxicity and to improve efficacy. The thalidomide analogues represent a new class of active drugs based on immunmodulatory and direct anti-myeloma effects which have been demonstrated to have a greater potency to inhibit growth of MM and angiogenesis in vitro and in vivo than thalidomide. In a phase I study heavily pretreated patients with relapsed or refractory myeloma were treated with CC-5013 (RevlimidTM, lenalidomide). Revlimid at doses up to 25 mg/day was safe and well tolerated. The dose-limiting toxicity (DLT) was myelosupression at a dose level of 50 mg/day. In contrast to thalidomide treatment with CC- 5013 showed no significant side effects like somnolence, constipation or neuropathy. In addition 29 % of the subjects achieved a > 50% paraprotein reduction, 71% a reduction of > 25%. Preliminary phase II data showed in about 20 % of relapsed myeloma patients a > 50% reduction of paraprotein, a > 25% reduction could be observed in about 50%. No additional toxicity was observed in combination with dexamethasone. Thus, Revlimid as a single agent is well tolerated and has a profound anti-myeloma activity in patients with refractory or relapsed disease. These data suggest that Revlimid combined with chemotherapy could lead to enhanced anti-myeloma effects with acceptable toxicities. The present study will investigate the safety and the efficacy of intermittent dosing of CC-5013 (Revlimid) combined with Dexamethasone and Doxorubicin in the treatment of relapsed or refractory myeloma. Objectives Primary Objectives
Allocation: Non-Randomized, Control: Uncontrolled, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment
Dept. of Internal Medicine II, University of Wuerzburg
University of Wuerzburg
Published on BioPortfolio: 2014-08-27T03:45:31-0400
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