Spots Global Cancer Trial Database for Studying Tissue Samples to Learn More About Drug Resistance in Patients With Acute Myeloid Leukemia

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Trial Identification

Brief Title: Studying Tissue Samples to Learn More About Drug Resistance in Patients With Acute Myeloid Leukemia

Official Title: Comparison of P-gp Efflux and Accumulation Assay Results With ECOG 3999 Leukemia Samples

Study ID: NCT00900380

Conditions

Leukemia

Interventions

flow cytometry

immunological diagnostic method

laboratory biomarker analysis

Study Description

Brief Summary: RATIONALE: Studying samples of tissue from patients with cancer in the laboratory may help doctors learn more about cancer and the development of drug resistance in patients. PURPOSE: This laboratory study is examining tissue samples from patients with acute myeloid leukemia to learn more about drug resistance in these patients.

Detailed Description: OBJECTIVES: * Ascertain whether assessments of P-glycoprotein (P-gp) status using the accumulation assay find greater than 10% positive specimens among 30 specimens (collected from patients with acute myeloid leukemia enrolled on clinical trial ECOG-E3999) found to be negative using only the efflux assay. OUTLINE: This is a multicenter study. Cryopreserved bone marrow specimens are examined for P-glycoprotein (P-gp) by the accumulation assay and the efflux assay using DiOC_2 dye. Flow cytometry is used for measuring activity in both assays. PROJECTED ACCRUAL: A total of 40 specimens will be accrued for this study.