Dietary n‐3 polyunsaturated fatty acids decrease hepatic triglycerides in Fischer 344 rats

James R. Levy, John N. Clore, Wayne Stevens – 27 February 2004 – Dietary fatty acid composition modifies hepatic lipid metabolism. To determine the effects of fatty acids on hepatic triglyceride storage, rats were fed diets enriched in carbohydrates (control), fish oil, or lard. After 4 weeks, the animals were fasted overnight. In the morning, the animals were either sacrificed or fed 8 g of their respective diets before sacrifice. Animals ingested more food calories with diets containing fish oil than with other diets. However, fish oil–fed animals weighed less and had less body fat.

Hepatocyte proliferation and tissue remodeling is impaired after liver injury in oncostatin M receptor knockout mice

Koji Nakamura, Hidenori Nonaka, Hiroki Saito, Minoru Tanaka, Atsushi Miyajima – 27 February 2004 – Oncostatin M (OSM) is a member of the IL‐6 family of cytokines. Mice deficient in the OSM receptor (OSMR‐/‐) showed impaired liver regeneration with persistent parenchymal necrosis after carbon tetrachloride (CCl4) exposure. The recovery of liver mass from partial hepatectomy was also significantly delayed in OSMR‐/‐ mice.

Immortalized p19ARF null hepatocytes restore liver injury and generate hepatic progenitors after transplantation

Mario Mikula, Eva Fuchs, Heidemarie Huber, Hartmut Beug, Rolf Schulte‐Hermann, Wolfgang Mikulits – 27 February 2004 – Primary hepatocytes are blocked in mitotic activity and well‐defined culture conditions only allow the limited expansion of these cells. Various genetic modifications have therefore been employed to establish immortalized hepatic cell lines, but, unfortunately, proper hepatocyte cultures conducting a faithful hepatic gene expression program and lacking malignancy are hardly available.

Oxysterols induce cyclooxygenase‐2 expression in cholangiocytes: Implications for biliary tract carcinogenesis

Jung‐Hwan Yoon, Ali E. Canbay, Nathan W. Werneburg, Sum P. Lee, Gregory J. Gores – 27 February 2004 – Cyclooxygenase‐2 (COX‐2), which is expressed by cholangiocytes in biliary tract disorders, has recently been implicated in biliary tract carcinogenesis. The mechanisms responsible for this COX‐2 expression remain unclear. In human diseases, bile contains oxygenated derivatives of cholesterol (oxysterols) which possess diverse biological properties. Therefore, we determined if oxysterols modulate COX‐2 expression.

P‐selectin suppresses hepatic inflammation and fibrosis in mice by regulating interferon γ and the IL‐13 decoy receptor

Thomas A. Wynn, Matthias Hesse, Netanya G. Sandler, Mallika Kaviratne, Karl F. Hoffmann, Monica G. Chiaramonte, Rachael Reiman, Allen W. Cheever, Joseph P. Sypek, Margaret M. Mentink‐Kane – 27 February 2004 – The selectin family of cell adhesion molecules is widely thought to promote inflammatory reactions by facilitating leukocyte recruitment.

Is fibrolamellar carcinoma different from hepatocellular carcinoma? A US population‐based study

Hashem B. El‐Serag, Jessica A. Davila – 27 February 2004 – There have been no population‐based studies of the epidemiology and prognosis of patients with fibrolamellar carcinoma (FLC). We conducted a retrospective cohort study using information collected by population‐based registries of the Surveillance, Epidemiology, and End Results (SEER) program.

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