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Deprecated: Implicit conversion from float 267.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cancer+Res 2015 ; 75 (9): 1859-67 Nephropedia Template TP
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MiR-21 Inhibition Reduces Liver Fibrosis and Prevents Tumor Development by Inducing Apoptosis of CD24+ Progenitor Cells #MMPMID25769721
Zhang J; Jiao J; Cermelli S; Muir K; Jung KH; Zou R; Rashid A; Gagea M; Zabludoff S; Kalluri R; Beretta L
Cancer Res 2015[May]; 75 (9): 1859-67 PMID25769721show ga
MiR-21 is upregulated in hepatocellular carcinoma and intrahepatic cholangiocarcinoma where it is associated with poor prognosis. Here we offer preclinical evidence that miR-21 offers a therapeutic and chemopreventive target in these liver cancers. In mice with hepatic deletion of Pten, anti-miR-21 treatment reduced liver tumor growth and prevented tumor development. These effects were accompanied with a decrease in liver fibrosis and a concomitant reduction of CD24+ liver progenitor cells and S100A4+ cancer-associated stromal cells. Notch2 inhibition also occurred in tumors following anti-miR-21 treatment. We further showed that miR-21 is necessary for the survival of CD24+ progenitor cells, a cellular phenotype mediated by Notch2, osteopontin and integrin ?v. Our results identify miR-21 as a key regulator of tumor-initiating cell survival, malignant development and growth in liver cancer, highlighting the role of CD24+ cells in expansion of S100A4+ cancer-associated stromal cells and associated liver fibrosis.