PMID- 22553314 OWN - NLM STAT- MEDLINE DCOM- 20120824 LR - 20211203 IS - 1528-0020 (Electronic) IS - 0006-4971 (Print) IS - 0006-4971 (Linking) VI - 119 IP - 24 DP - 2012 Jun 14 TI - EVI1 is critical for the pathogenesis of a subset of MLL-AF9-rearranged AMLs. PG - 5838-49 LID - 10.1182/blood-2011-11-393827 [doi] AB - The proto-oncogene EVI1 (ecotropic viral integration site-1), located on chromosome band 3q26, is aberrantly expressed in human acute myeloid leukemia (AML) with 3q26 rearrangements. In the current study, we showed, in a large AML cohort carrying 11q23 translocations, that approximately 43% of all mixed lineage leukemia (MLL)-rearranged leukemias are EVI1(pos). High EVI1 expression occurs in AMLs expressing the MLL-AF6, -AF9, -AF10, -ENL, or -ELL fusion genes. In addition, we present evidence that EVI1(pos) MLL-rearranged AMLs differ molecularly, morphologically, and immunophenotypically from EVI1(neg) MLL-rearranged leukemias. In mouse bone marrow cells transduced with MLL-AF9, we show that MLL-AF9 fusion protein maintains Evi1 expression on transformation of Evi1(pos) HSCs. MLL-AF9 does not activate Evi1 expression in MLL-AF9-transformed granulocyte macrophage progenitors (GMPs) that were initially Evi1(neg). Moreover, shRNA-mediated knockdown of Evi1 in an Evi1(pos) MLL-AF9 mouse model inhibits leukemia growth both in vitro and in vivo, suggesting that Evi1 provides a growth-promoting signal. Using the Evi1(pos) MLL-AF9 mouse leukemia model, we demonstrate increased sensitivity to chemotherapeutic agents on reduction of Evi1 expression. We conclude that EVI1 is a critical player in tumor growth in a subset of MLL-rearranged AMLs. FAU - Bindels, Eric M J AU - Bindels EM AD - Department of Hematology, Erasmus University Medical Center, Rotterdam, The Netherlands. FAU - Havermans, Marije AU - Havermans M FAU - Lugthart, Sanne AU - Lugthart S FAU - Erpelinck, Claudia AU - Erpelinck C FAU - Wocjtowicz, Elizabeth AU - Wocjtowicz E FAU - Krivtsov, Andrei V AU - Krivtsov AV FAU - Rombouts, Elwin AU - Rombouts E FAU - Armstrong, Scott A AU - Armstrong SA FAU - Taskesen, Erdogan AU - Taskesen E FAU - Haanstra, Jurgen R AU - Haanstra JR FAU - Beverloo, H Berna AU - Beverloo HB FAU - Dohner, Hartmut AU - Dohner H FAU - Hudson, Wendy A AU - Hudson WA FAU - Kersey, John H AU - Kersey JH FAU - Delwel, Ruud AU - Delwel R FAU - Kumar, Ashish R AU - Kumar AR LA - eng GR - K08 CA122191/CA/NCI NIH HHS/United States GR - R01 CA087053/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20120502 PL - United States TA - Blood JT - Blood JID - 7603509 RN - 0 (DNA-Binding Proteins) RN - 0 (Histones) RN - 0 (MAS1 protein, human) RN - 0 (MDS1 and EVI1 Complex Locus Protein) RN - 0 (MECOM protein, human) RN - 0 (MLL-AF9 fusion protein, human) RN - 0 (Mecom protein, mouse) RN - 0 (Oncogene Proteins, Fusion) RN - 0 (Proto-Oncogene Mas) RN - 0 (RNA, Messenger) RN - 0 (Transcription Factors) RN - 149025-06-9 (Myeloid-Lymphoid Leukemia Protein) RN - K3Z4F929H6 (Lysine) SB - IM MH - Animals MH - Bone Marrow Cells/metabolism/pathology MH - Cell Proliferation MH - Cell Transformation, Neoplastic/genetics MH - Chromosomes, Human, Pair 11/genetics MH - Colony-Forming Units Assay MH - DNA-Binding Proteins/genetics/*metabolism MH - Gene Expression Profiling MH - Gene Expression Regulation, Leukemic MH - Gene Knockdown Techniques MH - Gene Rearrangement/*genetics MH - Histones/metabolism MH - Humans MH - Leukemia, Myeloid, Acute/*classification/etiology/*genetics MH - Lysine/metabolism MH - MDS1 and EVI1 Complex Locus Protein MH - Mice MH - Mice, Inbred C57BL MH - Myeloid-Lymphoid Leukemia Protein/*genetics MH - Oncogene Proteins, Fusion/*genetics MH - Promoter Regions, Genetic/genetics MH - Proto-Oncogene Mas MH - Proto-Oncogenes/genetics MH - RNA, Messenger/genetics/metabolism MH - Transcription Factors/genetics/*metabolism PMC - PMC3382941 EDAT- 2012/05/04 06:00 MHDA- 2012/08/25 06:00 PMCR- 2013/06/14 CRDT- 2012/05/04 06:00 PHST- 2012/05/04 06:00 [entrez] PHST- 2012/05/04 06:00 [pubmed] PHST- 2012/08/25 06:00 [medline] PHST- 2013/06/14 00:00 [pmc-release] AID - S0006-4971(20)47701-8 [pii] AID - 2011/393827 [pii] AID - 10.1182/blood-2011-11-393827 [doi] PST - ppublish SO - Blood. 2012 Jun 14;119(24):5838-49. doi: 10.1182/blood-2011-11-393827. Epub 2012 May 2.