DNA methylation-independent loss of RARA gene expression in acute myeloid leukemia.

Glasow, Annegret, Barrett, Angela, Petrie, Kevin, Gupta, Rajeev, Boix-Chornet, Manuel, Zhou, Da-Cheng, Grimwade, David, Gallagher, Robert, von Lindern, Marieke, Waxman, Samuel, Enver, Tariq, Hildebrandt, Guido and Zelent, Arthur (2008) DNA methylation-independent loss of RARA gene expression in acute myeloid leukemia. Blood, 111 (4). pp. 2374-7. ISSN 0006-4971

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Abstract

The retinoic acid receptor (RAR) alpha gene (RARA) encodes 2 major isoforms and mediates positive effects of all-trans retinoic acid (ATRA) on myelomonocytic differentiation. Expression of the ATRA-inducible (RARalpha2) isoform increases with myelomonocytic differentiation and appears to be down-regulated in many acute myeloid leukemia (AML) cell lines. Here, we demonstrate that relative to normal myeloid stem/progenitor cells, RARalpha2 expression is dramatically reduced in primary AML blasts. Expression of the RARalpha1 isoform is also significantly reduced in primary AML cells, but not in AML cell lines. Although the promoters directing expression of RARalpha1 and RARalpha2 are respectively unmethylated and methylated in AML cell lines, these regulatory regions are unmethylated in all the AML patient cell samples analyzed. Moreover, in primary AML cells, histones associated with the RARalpha2 promoter possessed diminished levels of H3 acetylation and lysine 4 methylation. These results underscore the complexities of the mechanisms responsible for deregulation of gene expression in AML and support the notion that diminished RARA expression contributes to leukemogenesis.

Item Type: Article
Subjects: Sciences > Biomedical Sciences
Sciences > Health Sciences
Divisions: Faculty of Health Sciences and Wellbeing > School of Medicine
Depositing User: Kevin Petrie
Date Deposited: 18 Aug 2020 11:20
Last Modified: 19 Aug 2020 10:10
URI: http://sure.sunderland.ac.uk/id/eprint/12427
ORCID for Kevin Petrie: ORCID iD orcid.org/0000-0002-9805-9152

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