Differential TGFβ pathway targeting by miR-122 in humans and mice affects liver cancer metastasis
Citations Over TimeTop 11% of 2016 papers
Abstract
Downregulation of a predominantly hepatocyte-specific miR-122 is associated with human liver cancer metastasis, whereas miR-122-deficient mice display normal liver function. Here we show a functional conservation of miR-122 in the TGFβ pathway: miR-122 target site is present in the mouse but not human TGFβR1, whereas a noncanonical target site is present in the TGFβ1 5'UTR in humans and other primates. Experimental switch of the miR-122 target between the receptor TGFβR1 and the ligand TGFβ1 changes the metastatic properties of mouse and human liver cancer cells. High expression of TGFβ1 in human primary liver tumours is associated with poor survival. We identify over 50 other miRNAs orthogonally targeting ligand/receptor pairs in humans and mice, suggesting that these are evolutionarily common events. These results reveal an evolutionary mechanism for miRNA-mediated gene regulation underlying species-specific physiological or pathological phenotype and provide a potentially valuable strategy for treating liver-associated diseases.
Related Papers
- → Comparative study of CYP2B1/2 induction and the transport of bilirubin and taurocholate in rat hepatocyte-mono- and hepatocyte-Kupffer cell co-cultures(2016)2 cited
- [Construction and identification of the human liver-specific miR-122 expression vector].(2009)
- → Plasma miR-122 levels in chronic hepatitis C patients achieving sustained virological response following DAA treatment with and without previous anti-miR-122 (RG-101) dosing(2017)
- → MicroRNA-122 (miRNA-122)(2009)
- → Faculty Opinions recommendation of Hepatitis C virus genetics affects miR-122 requirements and response to miR-122 inhibitors.(2014)