Long‐term follow‐up after successful interferon therapy of acute hepatitis C

Johannes Wiegand, Elmar Jäckel, Markus Cornberg, Holger Hinrichsen, Manfred Dietrich, Julian Kroeger, Wolfgang P. Fritsch, Anne Kubitschke, Nuray Aslan, Hans L. Tillmann, Michael Peter Manns, Heiner Wedemeyer – 30 June 2004 – Early treatment of acute hepatitis C infection with interferon alfa‐2b (IFN‐α‐2b) prevents chronicity in almost all patients. So far, no data are available on the long‐term outcome after interferon (IFN) therapy of acute hepatitis C.

Acetaminophen misconceptions

Barry H. Rumack – 30 June 2004 – Examination of the pharmacokinetics of acetaminophen can decrease misconceptions involved in clinical evaluation. Enzyme patterns and acetaminophen levels must be related to time and known metabolic phenomena. A careful look at ethanol and nutrition, especially fasting demonstrates that therapeutic doses of acetaminophen do not place patients at a greater risk in either of these instances. An overdose of acetaminophen in a chronic alcohol abuser may result in more severe hepatotoxicity than in the nonalcoholic.

Free fatty acids promote hepatic lipotoxicity by stimulating TNF‐α expression via a lysosomal pathway

Ariel E. Feldstein, Nathan W. Werneburg, Ali Canbay, Maria Eugenia Guicciardi, Steven F. Bronk, Robert Rydzewski, Laurence J. Burgart, Gregory J. Gores – 30 June 2004 – Nonalcoholic fatty liver disease (NAFLD) is a serious health problem. Although NAFLD represents a form of lipotoxicity, its pathogenesis remains poorly understood. The aim of this study was to examine the cellular mechanisms involved in free fatty acid (FFA)‐mediated hepatic lipotoxicity.

Connexin 32 dominant‐negative mutant transgenic rats are resistant to hepatic damage by chemicals

Makoto Asamoto, Naomi Hokaiwado, Toshiya Murasaki, Tomoyuki Shirai – 30 June 2004 – Connexins are subunits of gap junction channels, which allow direct transfer of ions, secondary messenger molecules, and other metabolites between contacting cells. Gap junctions are believed to be involved in tissue homeostasis, embryonic development, and control of cell proliferation. Several studies have shown that cell damage signals are transmitted through gap junctions when cells are irradiated or when cells bearing the herpes simplex virus‐thymidine kinase (HSV‐TK) gene are treated with ganciclovir.

Hepatocellular telomere shortening correlates with chromosomal instability and the development of human hepatoma

Ruben R. Plentz, Martin Caselitz, Joerg S. Bleck, Michael Gebel, Peer Flemming, Stefan Kubicka, Michael P. Manns, K. Lenhard Rudolph – 30 June 2004 – The telomere hypothesis of cancer initiation indicates that telomere shortening initiates cancer by induction of chromosomal instability. To test whether this hypothesis applies to human hepatocellular carcinoma (HCC), we analyzed the telomere length of hepatocytes in cytological smears of fine‐needle biopsies of liver tumors from patients with cirrhosis (n = 39).

Comparison of HCV‐specific intrahepatic CD4+ T cells in HIV/HCV versus HCV

Camilla S. Graham, Michael Curry, Qi He, Nezam Afdhal, David Nunes, Catherine Fleming, Robert Horsburgh, Donald Craven, Kenneth E. Sherman, Margaret James Koziel – 30 June 2004 – Persons with human immunodeficiency virus (HIV) and hepatits C virus (HCV) coinfection are at increased risk for progression to cirrhosis compared with persons with HCV alone, but the reasons for this are unclear.

Identification of the leukocyte cell‐derived chemotaxin 2 as a direct target gene of β‐catenin in the liver

Christine Ovejero, Catherine Cavard, Axel Périanin, Theodorus Hakvoort, Jacqueline Vermeulen, Cécile Godard, Monique Fabre, Philippe Chafey, Kazuo Suzuki, Béatrice Romagnolo, Satoshi Yamagoe, Christine Perret – 30 June 2004 – To clarify molecular mechanisms underlying liver carcinogenesis induced by aberrant activation of Wnt pathway, we isolated the target genes of β‐catenin from mice exhibiting constitutive activated β‐catenin in the liver. Adenovirus‐mediated expression of oncogenic β‐catenin was used to isolate early targets of β‐catenin in the liver.

Antiangiogenic property of pigment epithelium‐derived factor in hepatocellular carcinoma

Kojiro Matsumoto, Hiroki Ishikawa, Daisuke Nishimura, Keisuke Hamasaki, Kazuhiko Nakao, Katsumi Eguchi – 30 June 2004 – Pigment epithelium‐derived factor (PEDF) is one of the most powerful endogenous antiangiogenic reagents discovered to date. Its antiangiogenic potential in neoplastic disease remains unclear. In this study, we investigated antiangiogenic property of PEDF in hepatocellular carcinoma (HCC), a typical hypervascular tumor. In HCC cell lines, constitutive messenger RNA and protein expression of PEDF varied.

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