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Journal of Hematology & Oncology
Published in: Journal of Hematology & Oncology 1/2015

Open Access 01-12-2015 | Review

piRNA involvement in genome stability and human cancer

Authors: Miguel Moyano, Giovanni Stefani

Published in: Journal of Hematology & Oncology | Issue 1/2015

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Abstract

PIWI-interacting RNAs (piRNAs) are a large family of small, single-stranded, non-coding RNAs present throughout the animal kingdom. They form complexes with several members of the PIWI clade of Argonaute proteins and carry out regulatory functions. Their best established biological role is the inhibition of transposon mobilization, which they enforce both at the transcriptional level, through regulation of heterochromatin formation, and by promoting transcript degradation. In this capacity, piRNAs and PIWI proteins are at the heart of the germline cells’ efforts to preserve genome integrity. Additional regulatory roles of piRNAs and PIWI proteins in gene expression are becoming increasingly apparent.
PIWI proteins and piRNAs are often detected in human cancers deriving from germline cells as well as somatic tissues. Their detection in cancer correlates with poorer clinical outcomes, suggesting that they play a functional role in the biology of cancer. Nonetheless, the currently available information, while highly suggestive, is still not sufficient to entirely discriminate between a ‘passenger’ role for the ectopic expression of piRNAs and PIWI proteins in cancer from a ‘driver’ role in the pathogenesis of these diseases. In this article, we review some of the key available evidence for the role of piRNAs and PIWI in human cancer and discuss ways in which our understanding of their functions may be improved.
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Metadata
Title
piRNA involvement in genome stability and human cancer
Authors
Miguel Moyano
Giovanni Stefani
Publication date
01-12-2015
Publisher
BioMed Central
Published in
Journal of Hematology & Oncology / Issue 1/2015
Electronic ISSN: 1756-8722
DOI
https://doi.org/10.1186/s13045-015-0133-5

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