The polarized hepatic human/rat hybrid WIF 12‐1 and WIF‐B cells communicate efficiently in vitro via connexin 32‐constituted gap junctions

Catherine Chaumontet, Giovanna Mazzoleni, Catherine Decaens, Valérie Bex, Doris Cassio, Paule Martel – 30 December 2003 – Gap junction intercellular communication (GJIC) plays an essential role in the control of growth, differentiation, and functions of different tissues. The expression of connexins (Cxs), the structural proteins of gap junctions, is developmentally regulated and tissue‐specific In vivo hepatocytes express Cx32 and Cx26. Most currently available in vitro hepatic cell systems express Cx43 instead of the expected Cxs.

Effects of diosgenin, A plant‐derived steroid, on bile secretion and hepatocellular cholestasis induced by estrogens in the rat

Luigi Accatino, Margarita Pizarro, Nancy Solís, Cecilia S. Koenig – 30 December 2003 – Increased biliary secretion of cholesterol and lipid vesicles (unilamellae and multilamellae) induced by diosgenin (D), a plant‐derived steroid, has cytoprotective effects in the rat liver subjected to obstructive cholestasis.

Genomic fluidity is a necessary event preceding the acquisition of tumorigenicity during spontaneous neoplastic transformation of WB‐F344 rat liver epithelial cells

Michelle J. Hooth, Jack L. Vincent, William B. Coleman, Sharon C. Presnell, Joe W. Grisham, Gary J. Smith – 30 December 2003 – The genomic evolution of a cohort of WB‐F344 rat liver epithelial cell lineages undergoing spontaneous neoplastic transformation was followed to define the mechanistic relationship between genomic instability and progression to the neoplastic phenotype.

Effect of alcohol consumption on serum hepatitis C virus RNA and histological lesions in chronic hepatitis C

Fabienne Pessione, Françoise Degos, Patrick Marcellin, Véronique Duchatelle, Corinne Njapoum, Michèle Martinot‐Peignoux, Claude Degott, Dominique Valla, Serge Erlinger, Bernard Rueff – 30 December 2003 – The role of alcohol intake in the occurrence of severe liver disease in chronic hepatitis C virus (HCV) carriers is still debated. A cross‐sectional study has been conducted in 233 chronic hepatitis C virus carriers.

Heterozygosity for hereditary hemochromatosis is associated with more fibrosis in chronic hepatitis C

Belinda C. Smith, Jane Grove, Muna A. Guzail, Christopher P. Day, Ann K. Daly, Alastair D. Burt, Margaret F. Bassendine – 30 December 2003 – Hepatic iron has been associated with more aggressive liver disease in chronic viral hepatitis. We evaluated whether the recently described C282Y mutation of the hemochromatosis gene, designated HFE (responsible for at least 83% of hereditary hemochromatosis), was associated with more advanced liver disease in chronic hepatitis C.

Keratinocyte growth factor protects murine hepatocytes from tumor necrosis factor–induced apoptosis in vivo and in vitro

Giorgio Senaldi, Christine L. Shaklee, Bernadett Simon, Christopher G. Rowan, David L. Lacey, Thomas Hartung – 30 December 2003 – Keratinocyte growth factor (KGF) promotes epithelial growth and differentiation and has potent effects on the liver. The coinjection of lipopolysaccharide (LPS) and d ‐galactosamine (GalN) results in hepatic failure in mice. Mechanistically, LPS‐induced tumor necrosis factor (TNF) triggers hepatocyte apoptosis, which is enhanced by GalN‐arrested transcription. Similarly, the combination of TNF and actinomycin D (ActD) causes hepatocyte apoptosis in vitro.

Early Hepatitis C virus–RNA responses predict interferon treatment outcomes in chronic hepatitis C

William M. Lee, K. Rajender Reddy, Myron J. Tong, Martin Black, Dirk J. van Leeuwen, F. Blaine Hollinger, Kevin D. Mullen, Neville Pimstone, Donald Albert, Sheila Gardner – 30 December 2003 – In previous studies employing interferons (IFNs) in the treatment of chronic hepatitis C, there have been few reliable predictors of sustained responses.

Intrasplenic transplantation of allogeneic hepatocytes prolongs survival in anhepatic rats

Nikolaos Arkadopoulos, Helene Lilja, Kyung Suk Suh, Achilles A. Demetriou, Jacek Rozga – 30 December 2003 – To examine whether hepatocytes transplanted in the spleen can function as an ectopic liver, we performed hepatocyte transplantation in rats that were rendered anhepatic. Total hepatectomy was performed by using a novel single‐stage technique. Following hepatectomy, Group 1 rats (n = 16) were monitored until death to determine survival time without prior intervention.

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