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Clinical Trial Summary

RATIONALE: Bortezomib may stop the growth of cancer cells by blocking some of the enzymes needed for cell growth. Biological therapies, such as thalidomide, may stimulate the immune system in different ways and stop cancer cells from growing. It may also stop the growth of cancer by blocking blood flow to the cancer. Drugs used in chemotherapy, such as dexamethasone, work in different ways to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Giving bortezomib together with thalidomide and dexamethasone may kill more cancer cells.

PURPOSE: This phase II trial is studying how well giving bortezomib together with thalidomide and dexamethasone works in treating patients with relapsed or refractory multiple myeloma.


Clinical Trial Description

OBJECTIVES:

- Determine the confirmed overall response rate (complete remission, remission, and partial remission) in patients with relapsed or refractory multiple myeloma treated with bortezomib, thalidomide, and dexamethasone.

- Determine overall and progression-free survival of patients treated with this regimen.

- Determine the qualitative and quantitative toxic effects of this regimen in these patients.

- Correlate, preliminarily, treatment with bortezomib with the activation of osteoblasts in these patients.

OUTLINE: This is a multicenter study.

- Induction therapy: Patients receive bortezomib IV on days 1, 4, 8, and 11, oral thalidomide once daily on days 1-21, and oral dexamethasone once daily on days 1, 2, 4, 5, 8, 9, 11, and 12. Treatment repeats every 21 days until achievement of confirmed complete remission (CR), remission (R), or partial remission (PR) OR for up to 8 courses in the absence of disease progression or unacceptable toxicity.

Patients achieving confirmed CR, R, or PR who reach a plateau prior to receiving the maximum 8 courses of induction therapy OR who achieve confirmed CR, R, or PR after receiving the maximum 8 courses of induction therapy proceed to maintenance therapy. Patients achieving stable disease after receiving the maximum 8 courses of induction therapy either proceed to maintenance therapy or receive further treatment with bortezomib, thalidomide, and dexamethasone off-study.

- Maintenance therapy: Patients receive oral dexamethasone on days 1-4. Courses repeat every 28 days for up to 3 years in the absence of disease progression or unacceptable toxicity.

After completion of study treatment, patients are followed within 30 days and then every 6 months for up to 5 years.

PROJECTED ACCRUAL: A total of 90 patients will be accrued for this study within 18 months. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT00124579
Study type Interventional
Source Southwest Oncology Group
Contact
Status Terminated
Phase Phase 2
Start date August 2005
Completion date June 2010

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