Regulation of the UGT1A1 bilirubin‐conjugating pathway: Role of a new splicing event at the UGT1A locus

Eric Lévesque, Hugo Girard, Kim Journault, Johanie Lépine, Chantal Guillemette – 22 December 2006 – UDP‐glucuronosyltransferase 1A1 (UGT1A1) is involved in a wide range of biological and pharmacological processes because of its critical role in the conjugation of a diverse array of endogenous and exogenous compounds. We now describe a new UGT1A1 isoform, referred to as isoform 2 (UGT1A1_i2), encoded by a 1495‐bp complementary DNA isolated from human liver and generated by an alternative splicing event involving an additional exon found at the 3′ end of the UGT1A locus.

Transforming growth factor‐beta differentially regulates oval cell and hepatocyte proliferation

Lananh N. Nguyen, Momoko H. Furuya, Lawrence A. Wolfraim, Anthony P. Nguyen, Matthew S. Holdren, Jean S. Campbell, Belinda Knight, George C. T. Yeoh, Nelson Fausto, W. Tony Parks – 22 December 2006 – Oval cells are hepatocytic precursors that proliferate in late‐stage cirrhosis and that give rise to a subset of human hepatocellular carcinomas. Although liver regeneration typically occurs through replication of existing hepatocytes, oval cells proliferate only when hepatocyte proliferation is inhibited.

Sustained Epstein‐Barr virus detection in paediatric liver transplantation. Insights into the occurrence of late PTLD

Lorenzo D'Antiga, Monica Del Rizzo, Carlo Mengoli, Umberto Cillo, Graziella Guariso, Lucia Zancan – 11 December 2006 – Epstein‐Barr virus (EBV) infection is the main cause of post‐transplant lymphoproliferative disease (PTLD). Little is known on chronic carrier state and its relation with late PTLD. We aimed to study EBV infection in the long‐term after paediatric liver transplantation (OLT). We conducted a retrospective review of 34 children monitored for a median of 5.8 years (range 1.5‐17.7). 21 were IgG seronegative (group A) and 13 seropositive (group B) before OLT.

Comparison of clinical outcomes in chronic hepatitis B liver transplant candidates with and without hepatocellular carcinoma

Stephen N. Wong, K. Rajender Reddy, Emmet B. Keeffe, Steven‐Huy Han, Paul J. Gaglio, Robert P. Perrillo, Tram T. Tran, Timothy L. Pruett, Anna S.F. Lok – 11 December 2006 – Patients with hepatocellular carcinoma (HCC) receive a higher MELD score and may undergo liver transplantation (OLT) earlier compared to patients with cirrhosis, potentially decreasing waiting list mortality. However, post‐OLT survival may be reduced by recurrence of HCC. We compared clinical outcomes between patients with HBV‐cirrhosis and no HCC and patients with HBV‐HCC.

Fulminant hepatitis A virus infection in the United States: Incidence, prognosis, and outcomes

Ryan M. Taylor, Timothy Davern, Santiago Munoz, Stephen‐Huy Han, Brendan McGuire, Anne M. Larson, Linda Hynan, William M. Lee, Robert J. Fontana, U.S. Acute Liver Failure Study Group – 28 November 2006 – Acute liver failure (ALF) due to hepatitis A virus (HAV) infection is an uncommon but potentially lethal illness. The aim of this study was to identify readily available laboratory and clinical features associated with a poor prognosis among ALF patients with HAV infection.

Surprises from the crystal structure of the hepatitis C virus NS2‐3 protease

Jerome Gouttenoire, Darius Moradpour, François Penin – 28 November 2006 – Hepatitis C virus is a major global health problem affecting an estimated 170 million people worldwide. Chronic infection is common and can lead to cirrhosis and liver cancer. There is no vaccine available and current therapies have met with limited success. The viral RNA genome encodes a polyprotein that includes 2 proteases essential for virus replication. The NS2‐3 protease mediates a single cleavage at the NS2/NS3 junction, whereas the NS3‐4A protease cleaves at 4 downstream sites in the polyprotein.

Mycophenolate mofetil in combination with reduction of calcineurin inhibitors for chronic renal dysfunction after liver transplantation

Georges‐Philippe Pageaux, Lionel Rostaing, Yvon Calmus, Christophe Duvoux, Claire Vanlemmens, Jean Hardgwissen, Pierre‐Henri Bernard, Eric Barbotte, Lucille Vercambre, Michael Bismuth, Pierre Puche, Françis Navarro, Dominique Larrey – 28 November 2006 – The purpose of the study was to introduce mycophenolate mofetil (MMF) in liver transplant recipients with renal dysfunction to decrease calcineurin inhibitor (CNI) dosages without increasing rejection risk.

Liver transplantation for fulminant hepatitis related to nevirapine therapy

Sophie Buyse, Eric Vibert, Mylène Sebagh, Teresa Antonini, Philippe Ichai, Denis Castaing, Didier Samuel, Jean‐Charles Duclos‐Vallée – 28 November 2006 – Drug‐induced hepatotoxicity is an important cause of hepatocellular injury. Non‐nucleoside retroviral transcriptase inhibitors are known to cause hepatotoxicity. We describe a detailed case of fulminant hepatitis induced by nevirapine (Viramune) and treated by liver transplantation. Liver Transpl 12:1880–1882, 2006. © 2006 AASLD.

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