Bone marrow–derived cells express matrix metalloproteinases and contribute to regression of liver fibrosis in mice

Reiichi Higashiyama, Yutaka Inagaki, Yun Yu Hong, Miwa Kushida, Sachie Nakao, Maki Niioka, Tetsu Watanabe, Hideyuki Okano, Yumi Matsuzaki, Goshi Shiota, Isao Okazaki – 22 December 2006 – Liver fibrosis is usually progressive, but it can occasionally be reversible if the causative agents are adequately removed or if patients are treated effectively. However, molecular mechanisms responsible for this reversibility of liver fibrosis have been poorly understood.

Ethanol‐induced oxidative stress suppresses generation of peptides for antigen presentation by hepatoma cells

Natalia A. Osna, Ronda L. White, Sandra Todero, Benita L. Mc Vicker, Geoffrey M. Thiele, Dahn L. Clemens, Dean J. Tuma, Terrence M. Donohue – 22 December 2006 – Processing of peptides for antigen presentation is catalyzed by antigen‐trimming enzymes, including the proteasome and leucine aminopeptidase. Oxidative stress suppresses proteasome function. We hypothesized that in liver cells, processing of antigenic peptides is altered by ethanol metabolism.

Hepatitis C virus eradication in intravenous drug users maintained with subcutaneous naltrexone implants

Gary P. Jeffrey, Gerry MacQuillan, Fern Chua, Sam Galhenage, Judith Bull, Emma Young, Gary Hulse, George O'Neil – 22 December 2006 – The effectiveness of HCV antiviral therapy in patients who have undergone recent drug dependency treatment and continue to inject drugs sporadically is presently not clear. Patients attending a community‐based drug rehabilitation and naltrexone implant clinic from October 2002 until March 2005 were screened for HCV infection and if positive offered further assessment and treatment with interferon and ribavirin therapy.

Keratin 18 overexpression but not phosphorylation or filament organization blocks mouse Mallory body formation

Masaru Harada, Pavel Strnad, Evelyn Z. Resurreccion, Nam‐On Ku, M. Bishr Omary – 22 December 2006 – Several human liver diseases are associated with formation of Mallory body (MB) inclusions. These hepatocyte cytoplasmic deposits are composed primarily of hyperphosphorylated keratins 8 and 18 (K8/K18). Feeding a 3,5‐diethoxycarbonyl‐1,4‐dihydrocollidine (DDC)‐containing diet is a well‐established mouse model of MBs. K8 overexpression, and K8‐null or K18‐null mouse models, indicate that a K8‐greater‐than‐K18 expression ratio is critical for MB formation.

Transcriptome classification of HCC is related to gene alterations and to new therapeutic targets

Sandrine Boyault, David S. Rickman, Aurélien de Reyniès, Charles Balabaud, Sandra Rebouissou, Emmanuelle Jeannot, Aurélie Hérault, Jean Saric, Jacques Belghiti, Dominique Franco, Paulette Bioulac‐Sage, Pierre Laurent‐Puig, Jessica Zucman‐Rossi – 22 December 2006 – Hepatocellular carcinomas (HCCs) are a heterogeneous group of tumors that differ in risk factors and genetic alterations. We further investigated transcriptome‐genotype‐phenotype correlations in HCC.

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