S9031-9333-0106-0112-A Study of Biomarkers in Samples From Patients With Acute Myeloid Leukemia Treated With Standard Chemotherapy With or Without Gemtuzumab Ozogamicin

The Development of Predictive Biomarker Models for Patients Receiving Standard Induction Chemotherapy With and Without Gemtuzumab Ozogamicin

RATIONALE: Studying samples of bone marrow and blood from patients with cancer in the laboratory may help doctors identify and learn more about biomarkers related to cancer.

PURPOSE: This research trial studies biomarkers in samples from patients with acute myeloid leukemia treated with standard chemotherapy with or without gemtuzumab ozogamicin.

OBJECTIVES:

• To determine whether measuring biomarkers in less-differentiated acute myeloid leukemia (AML) blasts significantly improves their predictive accuracy to predict clinical outcomes for patients receiving induction/consolidation chemotherapy with and without gemtuzumab ozogamicin.
• To develop and validate novel predictive biomarker models for predicting clinical outcomes for AML patients receiving induction/consolidation chemotherapy with and without gemtuzumab ozogamicin.

OUTLINE: DNA and RNA extracted from archived bone marrow and peripheral blood samples are analyzed for genomic mutations (CEBPA, FLT3, IDH1/2, KIT, NPM1, RUNX1, TP53, and WT1) and transcriptional biomarkers (BAALC, CCNA1, CD34, CEBPA, ERG, EVI1, FLT3, IL3RA, MCL1 [two splice variants], MN1, RUNX1, and WT1) by PCR and real-time PCR. Data are then analyzed by the Gene Scan software.

DISEASE CHARACTERISTICS:

• Pretreatment bone marrow (BM) and peripheral blood (PB) samples obtained from Southwest Oncology Group ( SWOG) Leukemia Repository for adult patients enrolled on SWOG-9031, SWOG-9333, SWOG-S0106, and SWOG-S0112
• Samples restricted to those patients from these studies with at least 3 or more vials of remaining material in the SWOG Leukemia Repository and vials containing at least 1.5 x 10^7 cells/vial
• Samples from patients who received standard induction with cytarabine (ARA)/daunorubicin hydrochloride (DNR) with the addition of gemtuzumab ozogamicin (Mylotarg®) on one arm of S0106

PATIENT CHARACTERISTICS:

• Not specified

PRIOR CONCURRENT THERAPY:

• See Disease Characteristics