RATIONALE: Studying samples of tissue from patients with cancer in the laboratory may help doctors learn more about cancer and development of drug resistance in patients. PURPOSE: This research trial is studying proteins that may promote chemotherapy resistance in samples from patients with acute myeloid leukemia.
OBJECTIVES: * Investigate whether changes in prosurvival signaling occur by comparing activation of the signal transducer and activator of transcription-3 (Stat3) and Stat5 pathways in paired diagnostic and relapse samples. * Investigate changes in leukemia cell responses to extrinsic cues from the environment change, using a bone marrow stromal-cell co-culture model of chemotherapy resistance. OUTLINE: Cryopreserved samples are analyzed for Stat3 and Stat5 expression by flow cytometry and in vitro chemotherapy sensitivity.
Study Type
OBSERVATIONAL
Enrollment
40
Changes in Stat3 and Stat5 in paired diagnostic and relapsed AML samples
Reduction in chemotherapy sensitivity by relapsed samples compared to diagnostic samples
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