Genomic instability and mouse microRNAs.

Abstract:

:Tumor progression is the continual selection of variant subpopulations of malignant cells that have acquired increasing levels of genetic instability (Nowell Science 1976, 194, 23-28). This instability is manifested as chromosomal aneuploidy or translocations, viral integration or somatic mutations that typically affect the expression of a gene (oncogene) that is especially damaging to the proper function of a cell. With the recent discovery of non-coding RNAs such as microRNAs (miRNAs), the concept that a target of genetic instability must be a protein-encoding gene is no longer tenable. Over the years, we have conducted several studies comparing the location of miRNA genes to positions of genetic instability, principally retroviral integration sites and chromosomal translocations in the mouse as a means of identifying miRNAs of importance in carcinogenesis. In this current study, we have used the most recent annotation of the mouse miRome (miRBase, release 16.0), and several datasets reporting the sites of integration of different retroviral vectors in a variety of mouse strains and mouse models of cancer, including for the first time a model that shows a propensity to form solid tumors, as a means to further identify or define, candidate oncogenic miRNAs. Several miRNA genes and miRNA gene clusters stand out as interesting new candidate oncogenes due to their close proximity to common retroviral integration sites including miR-29a/b/c and miR106a~363. We also discussed some recently identified miRNAs including miR-1965, miR-1900, miR-1945, miR-1931, miR-1894, and miR-1936 that are close to common retroviral integration sites and are therefore likely to have some role in cell homeostasis.

journal_name

Toxicol Mech Methods

authors

Huppi K,Pitt J,Wahlberg B,Caplen NJ

doi

10.3109/15376516.2011.562759

subject

Has Abstract

pub_date

2011-05-01 00:00:00

pages

325-33

issue

4

eissn

1537-6516

issn

1537-6524

journal_volume

21

pub_type

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