title: Expression of the B cell-associated transcription factors PAX5, OCT-2, and BOB.1 in acute myeloid leukemia: associations with B-cell antigen expression and myelomonocytic maturation.
abstract: The aberrant expression of the B-cell transcription factor PAX5 has been described in a subset of acute myeloid leukemia (AML) with t(8;21)(q22;q22) in association with B-cell antigen expression. However, the expression of other B cell-associated transcription factors, particularly OCT-2 and its B cell-specific coactivator BOB.1, has not been described in AML. In this study, expression of PAX5, OCT-2 and BOB.1 was evaluated by immunohistochemical staining of bone marrow samples from 83 cases of AML. The expression patterns were correlated with t(8;21)(q22;q22), B cell-associated antigen expression, and AML subtype. We confirmed the expression of PAX5 in AML with t(8;21)(q22;q22), but also demonstrated its expression in cases that express B-cell antigens but lack this translocation. Although OCT-2 and BOB.1 were not associated with PAX5 expression, we report expression of OCT-2 in AML with myelomonocytic/monocytic maturation and BOB.1 in normal hematopoietic elements.
authors.affiliation: Department of Clinical Pathology, Cleveland Clinic, Cleveland, OH 44195, USA.
authors.forename: Sarah E
authors.initials: SE
authors.lastname: Gibson
authors.forename: Henry Y
authors.initials: HY
authors.lastname: Dong
authors.forename: Anjali S
authors.initials: AS
authors.lastname: Advani
authors.forename: Eric D
authors.initials: ED
authors.lastname: Hsi
mesh_terms: D000208:Acute Disease; D015703:Antigens, CD / Q000378:metabolism*; D014408:Biomarkers, Tumor / Q000235:genetics / Q000378:metabolism; D001853:Bone Marrow / Q000378:metabolism / Q000473:pathology; D002454:Cell Differentiation; D005434:Flow Cytometry; D006801:Humans; D007150:Immunohistochemistry; D017404:In Situ Hybridization, Fluorescence; D007951:Leukemia, Myeloid / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D009000:Monocytes / Q000378:metabolism / Q000473:pathology; D009363:Neoplasm Proteins / Q000235:genetics / Q000378:metabolism; D050813:Octamer Transcription Factor-2 / Q000235:genetics / Q000378:metabolism*; D051757:PAX5 Transcription Factor / Q000235:genetics / Q000378:metabolism*; D046888:Tissue Array Analysis; D015534:Trans-Activators / Q000235:genetics / Q000378:metabolism*
chemical_list: D015703:Antigens, CD; D014408:Biomarkers, Tumor; D009363:Neoplasm Proteins; D050813:Octamer Transcription Factor-2; D051757:PAX5 Transcription Factor; C497281:PAX5 protein, human; C091546:POU2AF1 protein, human; D015534:Trans-Activators