Virological breakthrough and resistance in patients with chronic hepatitis B receiving nucleos(t)ide analogues in clinical practice

Chanunta Hongthanakorn, Watcharasak Chotiyaputta, Kelly Oberhelman, Robert J. Fontana, Jorge A. Marrero, Tracy Licari, Anna S. F. Lok – 24 March 2011 – Virological breakthrough (VBT) is the first manifestation of antiviral drug resistance during nucleos(t)ide analogue (NUC) treatment of chronic hepatitis B (CHB), but not all VBTs are due to drug resistance. This study sought to determine the incidence of VBT and genotypic resistance (GR) in patients with CHB who were receiving NUCs in clinical practice. Records of patients with CHB who were receiving NUCs were reviewed.

Strategies for hepatocellular carcinoma therapy and diagnostics: Lessons learned from high throughput and profiling approaches

Kai Breuhahn, Gregory Gores, Peter Schirmacher – 23 March 2011 – Over the last decade, numerous small and high‐dimensional profiling analyses have been performed in human hepatocellular carcinoma (HCC), which address different levels of regulation and modulation. Because comprehensive analyses are lacking, the following review summarizes some of the general results and compares them with insights from other tumor entities. Particular attention is given to the impact of these results on future diagnostic and therapeutic approaches. (HEPATOLOGY 2011;)

Diclofenac inhibits tumor necrosis factor‐α‐induced nuclear factor‐κB activation causing synergistic hepatocyte apoptosis

Lisa Fredriksson, Bram Herpers, Giulia Benedetti, Quraisha Matadin, Jordi C. Puigvert, Hans de Bont, Sanja Dragovic, Nico P.E. Vermeulen, Jan N.M. Commandeur, Erik Danen, Marjo de Graauw, Bob van de Water – 23 March 2011 – Drug‐induced liver injury (DILI) is an important clinical problem. It involves crosstalk between drug toxicity and the immune system, but the exact mechanism at the cellular hepatocyte level is not well understood. Here we studied the mechanism of crosstalk in hepatocyte apoptosis caused by diclofenac and the proinflammatory cytokine tumor necrosis factor α (TNF‐α).

Carbon monoxide enhances early liver regeneration in mice after hepatectomy

Kaori Kuramitsu, David Gallo, Myunghee Yoon, Beek Y. Chin, Eva Csizmadia, Douglas W. Hanto, Leo E. Otterbein – 23 March 2011 – Hepatocyte proliferation early after liver resection is critical in restoring liver mass and preserving function as the liver regenerates. Carbon monoxide (CO) generated by heme oxygenase‐1 (HO‐1) strongly influences cellular proliferation and both HO‐1 and CO are accepted hepatoprotective molecules. Mice lacking functional HO‐1 were unable to mount an appropriate regenerative response following partial hepatectomy (PHTx) compared to wildtype controls.

Polyinosinic‐polycytidylic acid suppresses acetaminophen‐induced hepatotoxicity independent of type I interferons and toll‐like receptor 3

Amir A. Ghaffari, Edward K. Chow, Shankar S. Iyer, Jane C. Deng, Genhong Cheng – 23 March 2011 – Viral infections are often linked to altered drug metabolism in patients; however, the underlying molecular mechanisms remain unclear. Here we describe a mechanism by which activation of antiviral responses by the synthetic double‐stranded RNA ligand, polyinosinic‐polycytidylic acid (polyI:C), leads to decreased acetaminophen (APAP) metabolism and hepatotoxicity.

Macrophage therapy for murine liver fibrosis recruits host effector cells improving fibrosis, regeneration, and function

James A. Thomas, Caroline Pope, Davina Wojtacha, Andrew J. Robson, Timothy T. Gordon‐Walker, Stephen Hartland, Prakash Ramachandran, Marielle Van Deemter, David A. Hume, John P. Iredale, Stuart J. Forbes – 23 March 2011 – Clinical studies of bone marrow (BM) cell therapy for liver cirrhosis are under way but the mechanisms of benefit remain undefined. Cells of the monocyte‐macrophage lineage have key roles in the development and resolution of liver fibrosis. Therefore, we tested the therapeutic effects of these cells on murine liver fibrosis.

Three ulcerative colitis susceptibility loci are associated with primary sclerosing cholangitis and indicate a role for IL2, REL, and CARD9

Marcel Janse, Laetitia E. Lamberts, Lude Franke, Soumya Raychaudhuri, Eva Ellinghaus, Kirsten Muri Boberg, Espen Melum, Trine Folseraas, Erik Schrumpf, Annika Bergquist, Einar Björnsson, Jingyuan Fu, Harm Jan Westra, Harry J.M. Groen, Rudolf S.N. Fehrmann, Joanna Smolonska, Leonard H. van den Berg, Roel A. Ophoff, Robert J. Porte, Tobias J. Weismüller, Jochen Wedemeyer, Christoph Schramm, Martina Sterneck, Rainer Günther, Felix Braun, Severine Vermeire, Liesbet Henckaerts, Cisca Wijmenga, Cyriel Y. Ponsioen, Stefan Schreiber, Tom H. Karlsen, Andre Franke, Rinse K.

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