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p53 represses the oncogenic Sno-MiR-28 derived from a SnoRNA

journal contribution
posted on 19.10.2018, 00:00 by F Yu, CP Bracken, KA Pillman, DM Lawrence, GJ Goodall, DF Callen, Paul NeilsenPaul Neilsen
© 2015 Yu et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. p53 is a master tumour repressor that participates in vast regulatory networks, including feedback loops involving microRNAs (miRNAs) that regulate p53 and that themselves are direct p53 transcriptional targets. We show here that a group of polycistronic miRNA-like non-coding RNAs derived from small nucleolar RNAs (sno-miRNAs) are transcriptionally repressed by p53 through their host gene, SNHG1. The most abundant of these, sno-miR-28, directly targets the p53-stabilizing gene, TAF9B. Collectively, p53, SNHG1, sno-miR-28 and TAF9B form a regulatory loop which affects p53 stability and downstream p53-regulated pathways. In addition, SNHG1, SNORD28 and sno-miR-28 are all significantly upregulated in breast tumours and the overexpression of sno-miR-28 promotes breast epithelial cell proliferation. This research has broadened our knowledge of the crosstalk between small non-coding RNA pathways and roles of sno-miRNAs in p53 regulation.

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

10

Issue

6

Start Page

e1

End Page

e20

Number of Pages

20

eISSN

1932-6203

Publisher

Public Library of Science

Additional Rights

CC BY 4.0

Peer Reviewed

Yes

Open Access

Yes

Acceptance Date

07/05/2015

External Author Affiliations

University of Adelaide; Centre for Cancer Biology; Swinburne University of Technology

Era Eligible

Yes

Journal

PLoS ONE