O6-benzylguanine And Carmustine in Treating Patients With Multiple Myeloma

Case Comprehensive Cancer Center17 enrolled

Overview

RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Combining more than one drug may kill more tumor cells. PURPOSE: Phase II trial to study the effectiveness of combining O6-benzylguanine with carmustine in treating patients who have previously untreated, refractory, or relapsing multiple myeloma.

OBJECTIVES: * Evaluate the efficacy of O6-benzylguanine combined with carmustine in patients with previously untreated or refractory multiple myeloma. * Assess the effects of O6-benzylguanine on bone marrow myeloma cells in this patient population. OUTLINE: Patients receive O6-benzylguanine IV over 60 minutes followed 1 hour later by carmustine IV over 60 minutes. Courses repeat every 6 weeks in the absence of disease progression or unacceptable toxicity. Patients receive 2 additional courses beyond attainment of best response (partial or complete response or stable or plateau disease). Patients are followed every 2 months. PROJECTED ACCRUAL: A total of 30 patients will be accrued for this study.

Study Type

INTERVENTIONAL

Allocation

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Multiple Myeloma and Plasma Cell Neoplasm

Interventions

O6-benzylguanineDRUG

Patients receive O6-benzylguanine IV over 60 minutes. Courses repeat every 6 weeks in the absence of disease progression or unacceptable toxicity. Patients receive 2 additional courses beyond attainment of best response.

carmustineDRUG

Followed 1 hour later by carmustine IV over 60 minutes. Courses repeat every 6 weeks in the absence of disease progression or unacceptable toxicity. Patients receive 2 additional courses beyond attainment of best response.

Eligibility

Sex: ALL

Medical Language ↔ Plain English

DISEASE CHARACTERISTICS: * Histologically confirmed progressive multiple myeloma, meeting 1 of the following criteria: * Previously untreated * Primary refractory * Relapsing disease * Major criteria: * Plasmacytomas on tissue biopsy * Bone marrow plasmacytosis with greater than 30% plasma cells * Monoclonal globulin spike on serum electrophoresis * Greater than 3.5 g/dL for G peaks or greater than 2.0 g for A peaks * Greater than 1.0 g/24 hours of kappa or lambda light chain excretion on urine electrophoresis in the absence of amyloidosis * Minor criteria: * 10%-30% bone marrow plasmacytosis (criterion A) * Presence of monoclonal globulin spike but less than the levels under major criteria (criterion B) * Lytic bone lesions (criterion C) * IgM less than 50 mg/dL, IgA less than 100 mg/dL, or IgG less than 600 mg/dL (criterion D) * Must meet one of the following: * A minimum of 1 major criterion and 1 minor criterion * 3 minor criteria, including criteria A and B PATIENT CHARACTERISTICS: Age: * Not specified Performance status: * ECOG 0-2 Life expectancy: * At least 12 weeks Hematopoietic: * WBC greater than 3,000/mm\^3 * Platelet count greater than 100,000/mm\^3 * Absolute neutrophil count greater than 1,500/mm\^3 * Hemoglobin greater than 9 g/dL (transfusions allowed) Hepatic: * Bilirubin less than 1.5 mg/dL * AST/ALT less than 2 times normal Renal: * Creatinine no greater than 2.0 mg/dL OR * Creatinine clearance greater than 60 mL/min * Calcium less than 14 mg/dL Pulmonary: * No prior or concurrent active, symptomatic respiratory disease * Corrected DLCO at least 60% predicted Other: * Controlled diabetes mellitus allowed * Not pregnant or nursing * Negative pregnancy test * Fertile patients must use effective contraception during and for 2 months after study participation PRIOR CONCURRENT THERAPY: Biologic therapy: * Not specified Chemotherapy: * No more than 1 prior chemotherapy regimen containing an alkylating agent for multiple myeloma * At least 4 weeks since prior chemotherapy Endocrine therapy: * Prior corticosteroids for multiple myeloma allowed Radiotherapy: * No prior pelvic radiotherapy or radiotherapy to more than 25% of bone marrow Surgery: * Not specified

Locations (3)

University of Chicago Cancer Research Center

Chicago, Illinois, United States

Ireland Cancer Center at University Hospitals Case Medical Center, Case Comprehensive Cancer Center

Cleveland, Ohio, United States

MetroHealth Medical Center

Cleveland, Ohio, United States

Outcomes

Primary Outcomes

Evaluate the efficacy of O6-benzylguanine combined with carmustine in patients with previously untreated or refractory multiple myeloma.

Time frame: Every 6 weeks in the absence of disease progression or unacceptable toxicity. Patients receive 2 additional courses beyond attainment of best response. Patients are followed every 2 months.

Data from ClinicalTrials.gov

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