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BMC Genomics. 2018 Mar 14;19(1):197. doi: 10.1186/s12864-018-4556-6.

The deregulated microRNAome contributes to the cellular response to aneuploidy.

Author information

1
Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152, Martinsried, Germany.
2
Center for Integrated Protein Sciences Munich, Ludwig-Maximilians-Universität München, Butenandtstr. 5, 81377, Munich, Germany.
3
Computational Biology Group, Developmental Biology Institute of Marseille (IBDM) UMR 7288, CNRS, Aix Marseille Université, 13288, Marseille, France.
4
Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152, Martinsried, Germany. storchova@bio.uni-kl.de.
5
Center for Integrated Protein Sciences Munich, Ludwig-Maximilians-Universität München, Butenandtstr. 5, 81377, Munich, Germany. storchova@bio.uni-kl.de.
6
Department of Molecular Genetics, TU Kaiserslautern, Paul Ehrlich Strasse 24, 67663, Kaiserslautern, Germany. storchova@bio.uni-kl.de.

Abstract

BACKGROUND:

Aneuploidy, or abnormal chromosome numbers, severely alters cell physiology and is widespread in cancers and other pathologies. Using model cell lines engineered to carry one or more extra chromosomes, it has been demonstrated that aneuploidy per se impairs proliferation, leads to proteotoxic as well as replication stress and triggers conserved transcriptome and proteome changes.

RESULTS:

In this study, we analysed for the first time miRNAs and demonstrate that their expression is altered in response to chromosome gain. The miRNA deregulation is independent of the identity of the extra chromosome and specific to individual cell lines. By cross-omics analysis we demonstrate that although the deregulated miRNAs differ among individual aneuploid cell lines, their known targets are predominantly associated with cell development, growth and proliferation, pathways known to be inhibited in response to chromosome gain. Indeed, we show that up to 72% of these targets are downregulated and the associated miRNAs are overexpressed in aneuploid cells, suggesting that the miRNA changes contribute to the global transcription changes triggered by aneuploidy. We identified hsa-miR-10a-5p to be overexpressed in majority of aneuploid cells. Hsa-miR-10a-5p enhances translation of a subset of mRNAs that contain so called 5'TOP motif and we show that its upregulation in aneuploids provides resistance to starvation-induced shut down of ribosomal protein translation.

CONCLUSIONS:

Our work suggests that the changes of the microRNAome contribute on one hand to the adverse effects of aneuploidy on cell physiology, and on the other hand to the adaptation to aneuploidy by supporting translation under adverse conditions.

KEYWORDS:

Aneuploidy; Cancer; Trisomy; miR-10a-5p; miRNA

PMID:
29703144
DOI:
10.1186/s12864-018-4556-6
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