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MiR-199a-3p Regulates mTOR and c-Met to Influence the Doxorubicin Sensitivity of Human Hepatocarcinoma Cells

Authors :
Gian Luca Grazi
Daniela Pollutri
George A. Calin
Pasquale Chieco
Laura Gramantieri
Luigi Bolondi
Massimo Negrini
Francesca Fornari
Maddalena Milazzo
Carlo M. Croce
Fornari F
Milazzo M
Chieco P
Negrini M
Calin GA
Grazi GL
Pollutri D
Croce CM
Bolondi L
Gramantieri L.
Source :
Cancer Research. 70:5184-5193
Publication Year :
2010
Publisher :
American Association for Cancer Research (AACR), 2010.

Abstract

MicroRNAs (miRNA) have rapidly emerged as modulators of gene expression in cancer in which they may have great diagnostic and therapeutic import. MicroRNA-199a-3p (miR-199a-3p) is downregulated in several human malignancies including hepatocellular carcinoma (HCC). Here, we show that miR-199a-3p targets mammalian target of rapamycin (mTOR) and c-Met in HCC cells. Restoring attenuated levels of miR-199a-3p in HCC cells led to G1-phase cell cycle arrest, reduced invasive capability, enhanced susceptibility to hypoxia, and increased sensitivity to doxorubicin-induced apoptosis. These in vitro findings were confirmed by an analysis of human HCC tissues, which revealed an inverse correlation linking miR-199a-3p and mTOR as well as a shorter time to recurrence after HCC resection in patients with lower miR-199a-3p expression. These results suggest that tactics to regulate mTOR and c-Met by elevating levels of miR-199a-3p may have therapeutic benefits in highly lethal cancers such as HCC. Cancer Res; 70(12); 5184–93. ©2010 AACR.

Details

ISSN :
15387445 and 00085472
Volume :
70
Database :
OpenAIRE
Journal :
Cancer Research
Accession number :
edsair.doi.dedup.....b3bdb39d394a6e686dc59ad26bee4489