Aryl‐hydrocarbon receptor activation regulates constitutive androstane receptor levels in murine and human liver

Rushang D. Patel, Brett D. Hollingshead, Curtis J. Omiecinski, Gary H. Perdew – 27 June 2007 – The aryl‐hydrocarbon receptor (AhR) is a basic helix‐loop‐helix/Per‐Arnt‐Sim transcription factor that can be activated by exogenous as well as endogenous ligands. AhR is traditionally associated with xenobiotic metabolism. In an attempt to identify novel target genes, C57BL/6J mice were treated with β‐naphthoflavone (BNF), a known AhR ligand, and genome‐wide expression analysis studies were performed using high‐density microarrays.

Chronic inflammation associated with hepatitis C virus infection perturbs hepatic transforming growth factor β signaling, promoting cirrhosis and hepatocellular carcinoma

Koichi Matsuzaki, Miki Murata, Katsunori Yoshida, Go Sekimoto, Yoshiko Uemura, Noriko Sakaida, Masaki Kaibori, Yasuo Kamiyama, Mikio Nishizawa, Junichi Fujisawa, Kazuichi Okazaki, Toshihito Seki – 27 June 2007 – Many patients with chronic hepatitis caused by hepatitis C virus (HCV) infection develop liver fibrosis with high risk for hepatocellular carcinoma (HCC), but the mechanism underling this process is unclear.

Lentivirus‐mediated RNA interference targeting enhancer of zeste homolog 2 inhibits hepatocellular carcinoma growth through down‐regulation of stathmin

Yangchao Chen, Marie C. Lin, Hong Yao, Hua Wang, Ai‐Qun Zhang, Jun Yu, Chee‐kin Hui, George K. Lau, Ming‐liang He, Joseph Sung, Hsiang‐fu Kung – 27 June 2007 – Enhancer of zeste homolog 2 (EZH2) has been shown to be overexpressed in hepatocellular (HCC). We investigated the potential role of EZH2 in HCC tumorigenesis and examined the usefulness of RNA interference (RNAi) targeting EZH2 as a form of HCC treatment. Lentivirus‐mediated RNAi was employed to knock‐down EZH2 expression in human hepatoma cells to study the function of EZH2 in tumorigenesis and evaluate the treatment efficacy.

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Nathalie Ganne‐Carrié, Marianne Ziol, Victor de Ledinghen, Catherine Douvin, Patrick Marcellin, Laurent Castera, Daniel Dhumeaux, Jean‐Claude Trinchet, Michel Beaugrand – 27 June 2007

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