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ATRA resolves the differentiation block in t(15;17) acute myeloid leukemia by restoring PU.1 expression
Tightly regulated expression of the transcription factor PU.1 is crucial for normal hematopoiesis. PU.1 knockdown mice develop acute myeloid leukemia (AML), and PU.1 mutations have been observed in some populations of patients with AML. Here we found that conditional expression of promyelocytic leuk...
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Published in: | Blood 2006-04, Vol.107 (8), p.3330-3338 |
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description | Tightly regulated expression of the transcription factor PU.1 is crucial for normal hematopoiesis. PU.1 knockdown mice develop acute myeloid leukemia (AML), and PU.1 mutations have been observed in some populations of patients with AML. Here we found that conditional expression of promyelocytic leukemia-retinoic acid receptor α (PML-RARA), the protein encoded by the t(15;17) translocation found in acute promyelocytic leukemia (APL), suppressed PU.1 expression, while treatment of APL cell lines and primary cells with all-trans retinoic acid (ATRA) restored PU.1 expression and induced neutrophil differentiation. ATRA-induced activation was mediated by a region in the PU.1 promoter to which CEBPB and OCT-1 binding were induced. Finally, conditional expression of PU.1 in human APL cells was sufficient to trigger neutrophil differentiation, whereas reduction of PU.1 by small interfering RNA (siRNA) blocked ATRA-induced neutrophil differentiation. This is the first report to show that PU.1 is suppressed in acute promyelocytic leukemia, and that ATRA restores PU.1 expression in cells harboring t(15;17). |
doi_str_mv | 10.1182/blood-2005-07-3068 |
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PU.1 knockdown mice develop acute myeloid leukemia (AML), and PU.1 mutations have been observed in some populations of patients with AML. Here we found that conditional expression of promyelocytic leukemia-retinoic acid receptor α (PML-RARA), the protein encoded by the t(15;17) translocation found in acute promyelocytic leukemia (APL), suppressed PU.1 expression, while treatment of APL cell lines and primary cells with all-trans retinoic acid (ATRA) restored PU.1 expression and induced neutrophil differentiation. ATRA-induced activation was mediated by a region in the PU.1 promoter to which CEBPB and OCT-1 binding were induced. Finally, conditional expression of PU.1 in human APL cells was sufficient to trigger neutrophil differentiation, whereas reduction of PU.1 by small interfering RNA (siRNA) blocked ATRA-induced neutrophil differentiation. 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PU.1 knockdown mice develop acute myeloid leukemia (AML), and PU.1 mutations have been observed in some populations of patients with AML. Here we found that conditional expression of promyelocytic leukemia-retinoic acid receptor α (PML-RARA), the protein encoded by the t(15;17) translocation found in acute promyelocytic leukemia (APL), suppressed PU.1 expression, while treatment of APL cell lines and primary cells with all-trans retinoic acid (ATRA) restored PU.1 expression and induced neutrophil differentiation. ATRA-induced activation was mediated by a region in the PU.1 promoter to which CEBPB and OCT-1 binding were induced. Finally, conditional expression of PU.1 in human APL cells was sufficient to trigger neutrophil differentiation, whereas reduction of PU.1 by small interfering RNA (siRNA) blocked ATRA-induced neutrophil differentiation. This is the first report to show that PU.1 is suppressed in acute promyelocytic leukemia, and that ATRA restores PU.1 expression in cells harboring t(15;17).</description><subject>Animals</subject><subject>Antineoplastic Agents - pharmacology</subject><subject>Cell Differentiation - drug effects</subject><subject>Cell Differentiation - genetics</subject><subject>Cell Line, Tumor</subject><subject>Chromosomes, Human, Pair 15 - genetics</subject><subject>Chromosomes, Human, Pair 17 - genetics</subject><subject>Gene Expression Regulation, Leukemic - drug effects</subject><subject>Humans</subject><subject>Leukemia, Myeloid, Acute - genetics</subject><subject>Leukemia, Myeloid, Acute - metabolism</subject><subject>Leukemia, Myeloid, Acute - pathology</subject><subject>Mice</subject><subject>Mice, Knockout</subject><subject>Neoplasia</subject><subject>Neoplasm Proteins - biosynthesis</subject><subject>Neoplasm Proteins - genetics</subject><subject>Neutrophils - metabolism</subject><subject>Neutrophils - pathology</subject><subject>Octamer Transcription Factor-1 - metabolism</subject><subject>Oncogene Proteins, Fusion - biosynthesis</subject><subject>Oncogene Proteins, Fusion - genetics</subject><subject>Proto-Oncogene Proteins - biosynthesis</subject><subject>Proto-Oncogene Proteins - genetics</subject><subject>Trans-Activators - biosynthesis</subject><subject>Trans-Activators - genetics</subject><subject>Translocation, Genetic - genetics</subject><subject>Tretinoin - pharmacology</subject><issn>0006-4971</issn><issn>1528-0020</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><recordid>eNp9kM1r3DAQxUVpaLZp_4Eeio7twemMZFk2LYUl9AsCCSU5C9kabdR4rUXyLt3_vtpu6Mclp4GZ937De4y9QjhHbMW7fozRVQJAVaArCU37hC1QibYCEPCULQCgqepO4yl7nvMPAKylUM_YKTayyLBesNXy5vuSJ8px3FHm8x1xF7ynRNMc7BzixMub4Z6Hic9vUL1H_ZbbYTsTX-9pjMHxkbb3tA6W9_sDaI4pTCt-fXuOnH5uyiYXygt24u2Y6eXDPGO3nz_dXHytLq--fLtYXlZDreRcSaRGOiFk72stdauE67T3AK30DtF20OiaOi-El9IR-r7EdnWj2sbbWqE8Yx-P3M22X5MbSoxkR7NJYW3T3kQbzP-XKdyZVdwZbDulGygAcQQMKeacyP_xIphD7eZ37eZQuwFtDrUX0-t_v_61PPRcBB-OAirZd4GSyUOgaSAXEg2zcTE8xv8F0zSUFQ</recordid><startdate>20060415</startdate><enddate>20060415</enddate><creator>Mueller, Beatrice U.</creator><creator>Pabst, Thomas</creator><creator>Fos, José</creator><creator>Petkovic, Vibor</creator><creator>Fey, Martin F.</creator><creator>Asou, Norio</creator><creator>Buergi, Ulrich</creator><creator>Tenen, Daniel G.</creator><general>Elsevier Inc</general><general>2006 by The American Society of Hematology</general><scope>6I.</scope><scope>AAFTH</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>5PM</scope></search><sort><creationdate>20060415</creationdate><title>ATRA resolves the differentiation block in t(15;17) acute myeloid leukemia by restoring PU.1 expression</title><author>Mueller, Beatrice U. ; 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PU.1 knockdown mice develop acute myeloid leukemia (AML), and PU.1 mutations have been observed in some populations of patients with AML. Here we found that conditional expression of promyelocytic leukemia-retinoic acid receptor α (PML-RARA), the protein encoded by the t(15;17) translocation found in acute promyelocytic leukemia (APL), suppressed PU.1 expression, while treatment of APL cell lines and primary cells with all-trans retinoic acid (ATRA) restored PU.1 expression and induced neutrophil differentiation. ATRA-induced activation was mediated by a region in the PU.1 promoter to which CEBPB and OCT-1 binding were induced. Finally, conditional expression of PU.1 in human APL cells was sufficient to trigger neutrophil differentiation, whereas reduction of PU.1 by small interfering RNA (siRNA) blocked ATRA-induced neutrophil differentiation. 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subjects | Animals Antineoplastic Agents - pharmacology Cell Differentiation - drug effects Cell Differentiation - genetics Cell Line, Tumor Chromosomes, Human, Pair 15 - genetics Chromosomes, Human, Pair 17 - genetics Gene Expression Regulation, Leukemic - drug effects Humans Leukemia, Myeloid, Acute - genetics Leukemia, Myeloid, Acute - metabolism Leukemia, Myeloid, Acute - pathology Mice Mice, Knockout Neoplasia Neoplasm Proteins - biosynthesis Neoplasm Proteins - genetics Neutrophils - metabolism Neutrophils - pathology Octamer Transcription Factor-1 - metabolism Oncogene Proteins, Fusion - biosynthesis Oncogene Proteins, Fusion - genetics Proto-Oncogene Proteins - biosynthesis Proto-Oncogene Proteins - genetics Trans-Activators - biosynthesis Trans-Activators - genetics Translocation, Genetic - genetics Tretinoin - pharmacology |
title | ATRA resolves the differentiation block in t(15;17) acute myeloid leukemia by restoring PU.1 expression |
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