Imbalanced expression of polycistronic miRNA in acute myeloid leukemia.

Abstract:

:miR-1 and miR-133 are clustered on the same chromosomal loci and are transcribed together as a single transcript that is positively regulated by ecotropic virus integration site-1 (EVI1). Previously, we described how miR-133 has anti-tumorigenic potential through repression of EVI1 expression. It has also been reported that miR-1 is oncogenic in the case of acute myeloid leukemia (AML). Here, we show that expression of miR-1 and miR-133, which have distinct functions, is differentially regulated between AML cell lines. Interestingly, the expression of miR-1 and EVI1, which binds to the promoter of the miR-1/miR-133 cluster, is correlative. The expression levels of TDP-43, an RNA-binding protein that has been reported to increase the expression, but inhibits the activity, of miR-1, were not correlated with expression levels of miR-1 in AML cells. Taken together, our observations raise the possibility that the balance of polycistronic miRNAs is regulated post-transcriptionally in a hierarchical manner possibly involving EVI1, suggesting that the deregulation of this balance may play some role in AML cells with high EVI1 expression.

journal_name

Int J Hematol

authors

Kotaki R,Higuchi H,Ogiya D,Katahira Y,Kurosaki N,Yukihira N,Ogata J,Yamamoto H,Mohamad Alba S,Azhim A,Kitajima T,Inoue S,Morishita K,Ono K,Koyama-Nasu R,Kotani A

doi

10.1007/s12185-017-2314-1

subject

Has Abstract

pub_date

2017-12-01 00:00:00

pages

811-819

issue

6

eissn

0925-5710

issn

1865-3774

pii

10.1007/s12185-017-2314-1

journal_volume

106

pub_type

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