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Micro-ribonucleic acid-155 is a direct target of Meis1, but not a driver in acute myeloid leukemia

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Item Type:Article
Title:Micro-ribonucleic acid-155 is a direct target of Meis1, but not a driver in acute myeloid leukemia
Creators Name:Schneider, E., Staffas, A., Röhner, L., Malmberg, E.D., Ashouri, A., Krowiorz, K., Pochert, N., Miller, C., Wei, S.Y., Arabanian, L., Buske, C., Döhner, H., Bullinger, L., Fogelstrand, L., Heuser, M., Döhner, K., Xiang, P., Ruschmann, J., Petriv, O.I., Heravi-Moussavi, A., Hansen, C.L., Hirst, M., Humphries, R.K., Rouhi, A., Palmqvist, L. and Kuchenbauer, F.
Abstract:Micro-ribonucleic acid-155 (miR-155) is one of the first described oncogenic miRNAs. Although multiple direct targets of miR-155 have been identified, it is not clear how it contributes to the pathogenesis of acute myeloid leukemia. We found miR-155 to be a direct target of Meis1 in murine Hoxa9/Meis1 induced acute myeloid leukemia. The additional overexpression of miR-155 accelerated the formation of acute myeloid leukemia in Hoxa9 as well as in Hoxa9/Meis1 cells However, in the absence or following the removal of miR-155, leukemia onset and progression were unaffected. Although miR-155 accelerated growth and homing in addition to impairing differentiation, our data underscore the pathophysiological relevance of miR-155 as an accelerator rather than a driver of leukemogenesis. This further highlights the complexity of the oncogenic program of Meis1 to compensate for the loss of a potent oncogene such as miR-155. These findings are highly relevant to current and developing approaches for targeting miR-155 in acute myeloid leukemia.
Keywords:Carcinogenesis, Leukemic Gene Expression Regulation, Homeodomain Proteins, Acute Myeloid Leukemia, MicroRNAs, Myeloid Ecotropic Viral Integration Site 1 Protein / Pharmacology, Animals, Mice
Source:Haematologica
ISSN:0390-6078
Publisher:Ferrata Storti Foundation
Volume:103
Number:2
Page Range:246-255
Date:February 2018
Official Publication:https://doi.org/10.3324/haematol.2017.177485
PubMed:View item in PubMed

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