An HNF4a-miRNA Inflammatory Feedback Circuit Regulates Hepatocellular Oncogenesis
نویسندگان
چکیده
Maria Hatziapostolou,1,2 Christos Polytarchou,1,2 Eleni Aggelidou,4 Alexandra Drakaki,5 George A. Poultsides,6 Savina A. Jaeger,7 Hisanobu Ogata,8 Michael Karin,8 Kevin Struhl,3 Margarita Hadzopoulou-Cladaras,4,9 and Dimitrios Iliopoulos1,2,9,* 1Department of Cancer Immunology and AIDS, Dana-Farber Cancer Institute 2Department of Microbiology and Immunobiology 3Department of Biological Chemistry and Molecular Pharmacology Harvard Medical School, Boston, MA 02115, USA 4Department of Genetics, Developmental andMolecular Biology, Laboratory of Developmental Biology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece 5Division of Hematology/Oncology, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA 6Department of Surgery, Stanford University Medical Center, Stanford, CA 94305, USA 7Department of Developmental Molecular Pathways, Novartis Institute for Biomedical Research, Cambridge, MA 02139, USA 8Laboratory of Gene Regulation and Signal Transduction, School of Medicine, University of California, San Diego, La Jolla, CA 92093, USA 9These authors contributed equally to this work *Correspondence: [email protected] DOI 10.1016/j.cell.2011.10.043
منابع مشابه
An HNF4α-miRNA Inflammatory Feedback Circuit Regulates Hepatocellular Oncogenesis
Hepatocyte nuclear factor 4α (HNF4α) is essential for liver development and hepatocyte function. Here, we show that transient inhibition of HNF4α initiates hepatocellular transformation through a microRNA-inflammatory feedback loop circuit consisting of miR-124, IL6R, STAT3, miR-24, and miR-629. Moreover, we show that, once this circuit is activated, it maintains suppression of HNF4α and sustai...
متن کاملPeroxisome proliferator-activated receptor alpha regulates a microRNA-mediated signaling cascade responsible for hepatocellular proliferation.
Activation of peroxisome proliferator-activated receptor alpha (PPARalpha) leads to hepatocellular proliferation and liver carcinomas. The early events mediating these effects are unknown. A novel mechanism by which PPARalpha regulates gene expression and hepatocellular proliferation was uncovered. MicroRNA (miRNA) expression profiling demonstrated that activated PPARalpha was a major regulator...
متن کاملIFN-λ Inhibits MiR-122 Transcription through a Stat3-HNF4α Inflammatory Feedback Loop in an IFN-α Resistant HCV Cell Culture System.
BACKGROUND HCV replication in persistently infected cell culture remains resistant to IFN-α/RBV combination treatment, whereas IFN-λ1 induces viral clearance. The antiviral mechanisms by which IFN-λ1 induces sustained HCV clearance have not been determined. AIM To investigate the mechanisms by which IFN-λ clears HCV replication in an HCV cell culture model. METHODS IFN-α sensitive (S3-GFP) ...
متن کاملIn silico and in vitro identification of microRNAs that regulate hepatic nuclear factor 4α expression.
Hepatic nuclear factor 4α (HNF4A) is a nuclear transcription factor that regulates the expression of many genes involved in drug disposition. To identify additional molecular mechanisms that regulate HNF4A, we identified microRNAs (miRNAs) that target HNF4A expression. In silico analyses suggested that HNF4A is targeted by many miRNAs. We conducted in vitro studies to validate several of these ...
متن کاملROCK inhibition enhances microRNA function by promoting deadenylation of targeted mRNAs via increasing PAIP2 expression
The reduced expression levels and functional impairment of global miRNAs are related to various human diseases, including cancers. However, relatively little is known about how global miRNA function may be upregulated. Here, we report that global miRNA function can be enhanced by Rho-associated, coiled-coil-containing protein kinase (ROCK) inhibitors. The regulation of miRNA function by ROCK in...
متن کامل