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Prepublished online as a Blood First Edition Paper on July 25, 2002; DOI 10.1182/blood-2002-01-0271. This Article Full Text Full Text (PDF) All Versions of this Article: 2002-01-0271v1 100/13/4594    most recent Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Rights and Permissions Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Abbott, B. L. Articles by Sorrentino, B. P. Search for Related Content PubMed PubMed Citation Articles by Abbott, B. L. Articles by Sorrentino, B. P. Related Collections Neoplasia Social Bookmarking                   What's this?  Previous Article  |  Table of Contents  |  Next Article  Blood, 15 December 2002, Vol. 100, No. 13, pp. 4594-4601 NEOPLASIA Low levels of ABCG2 expression in adult AML blast samples Brian L. Abbott, Anne-Marie Colapietro, Yuxiao Barnes, Frank Marini, Michael Andreeff, and Brian P. Sorrentino From the Department of Hematology/Oncology, St Jude Children's Research Hospital, Memphis, TN; and the Department of Blood and Marrow Transplantation, Section of Molecular Hematology and Therapy, M. D. Anderson Cancer Center, Houston, TX. Previous reports have suggested that the adenosine triphosphate-binding cassette protein ABCG2 (breast cancer resistance protein [BCRP], mitoxantrone resistance [MXR]) is associated with drug resistance in acute myeloid leukemia (AML). The aims of this study were to determine the level of ABCG2 mRNA expression necessary to produce drug resistance and to define the ABCG2 levels in normal bone marrow (BM), peripheral blood (PB), cord blood (CB), and adult AML blast cell populations. First, using transduced clonal cell lines expressing varying levels of ABCG2, we found that ABCG2 expression conferred resistance to mitoxantrone and topotecan, but not to idarubicin. Next, we developed a real-time reverse transcription-polymerase chain reaction assay for measuring ABCG2 mRNA expression levels in clinical samples. Normal BM and PB contained low levels of ABCG2 mRNA, while higher levels were measured in CB mononuclear cells, CD34+, and Ac133+ populations, consistent with the known stem cell enrichment in these populations. Next, we studied the ABCG2 mRNA levels in 40 specimens from newly diagnosed adult AML patients. Only 7% of these samples contained ABCG2 mRNA levels within the range of our drug-resistant clone, although another 78% were higher than normal blood and bone marrow. Flow cytometry revealed very small subpopulations of ABCG2-expressing cells in the cases we examined. Our data suggest that high levels of ABCG2 mRNA expression in adult AML blast specimens are relatively uncommon and that ABCG2 expression may be limited to a small cell subpopulation in some cases. © 2002 by The American Society of Hematology.   CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this? This article has been cited by other articles: M. L. Guzman, X. Li, C. A. Corbett, R. M. Rossi, T. Bushnell, J. L. Liesveld, J. Hebert, F. Young, and C. T. Jordan Rapid and selective death of leukemia stem and progenitor cells induced by the compound 4-benzyl, 2-methyl, 1,2,4-thiadiazolidine, 3,5 dione (TDZD-8) Blood, December 15, 2007; 110(13): 4436 - 4444. [Abstract] [Full Text] [PDF] J. 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