| First Author | Valdmanis PN | Year | 2018 |
| Journal | Nat Commun | Volume | 9 |
| Issue | 1 | Pages | 5321 |
| PubMed ID | 30552326 | Mgi Jnum | J:268347 |
| Mgi Id | MGI:6267564 | Doi | 10.1038/s41467-018-07786-7 |
| Citation | Valdmanis PN, et al. (2018) miR-122 removal in the liver activates imprinted microRNAs and enables more effective microRNA-mediated gene repression. Nat Commun 9(1):5321 |
| abstractText | miR-122 is a highly expressed liver microRNA that is activated perinatally and aids in regulating cholesterol metabolism and promoting terminal differentiation of hepatocytes. Disrupting expression of miR-122 can re-activate embryo-expressed adult-silenced genes, ultimately leading to the development of hepatocellular carcinoma (HCC). Here we interrogate the liver transcriptome at various time points after genomic excision of miR-122 to determine the cellular consequences leading to oncogenesis. Loss of miR-122 leads to specific and progressive increases in expression of imprinted clusters of microRNAs and mRNA transcripts at the Igf2 and Dlk1-Dio3 loci that could be curbed by re-introduction of exogenous miR-122. mRNA targets of other abundant hepatic microRNAs are functionally repressed leading to widespread hepatic transcriptional de-regulation. Together, this reveals a transcriptomic framework for the hepatic response to loss of miR-122 and the outcome on other microRNAs and their cognate gene targets. |
