Inhibitory activity of dioxolane purine analogs on wild‐type and lamivudine‐resistant mutants of hepadnaviruses

Béatrice Seignères, Christian Pichoud, Perrine Martin, Philip Furman, Christian Trépo, Fabien Zoulim – 30 December 2003 – To design combination strategies for chronic hepatitis B therapy, we evaluated in vitro the inhibitory activity of 4 nucleoside analogs, (−)FTC, L‐FMAU, DXG, and DAPD, in comparison with lamivudine (3TC) and PMEA.

Preemptive use of lamivudine reduces hepatitis B exacerbation after allogeneic hematopoietic cell transplantation

George K. K. Lau, Ming‐Liang He, Daniel Y. T. Fong, Angeline Bartholomeusz, Wing‐yan Au, Albert K. W. Lie, Stephen Locarnini, Raymond Liang – 30 December 2003 – Exacerbation of hepatitis B virus (HBV) is a serious cause of morbidity and mortality in hepatitis B surface antigen (HBsAg)‐positive patients undergoing transplantation. Our aim was to evaluate the effectiveness of lamivudine to prevent hepatitis due to exacerbation of HBV in HBsAg‐positive patients treated with allogeneic hematopoietic cell transplantation.

Selective mitochondrial glutathione depletion by ethanol enhances acetaminophen toxicity in rat liver

Ping Zhao, Thomas F. Kalhorn, John T. Slattery – 30 December 2003 – Chronic alcohol consumption may potentiate acetaminophen (APAP) hepatotoxicity through enhanced formation of N‐acetyl‐p‐benzoquinone imine (NAPQI) via induction of cytochrome P450 2E1 (CYP2E1). However, CYP2E1 induction appears to be insufficient to explain the claimed magnitude of the interaction. We assessed the role of selective depletion of liver mitochondrial glutathione (GSH) by chronic ethanol. Rats were fed the Lieber‐DeCarli diet for 10 days or 6 weeks.

Underexpression of mRNA in human hepatocellular carcinoma focusing on eight loci

Moritoshi Kinoshita, Masahiko Miyata – 30 December 2003 – Genetic alterations associated with human hepatocellular carcinoma (HCC) have been reported previously, but are not sufficient to specify differences of HCCs from precancerous diseases of the liver, such as hepatitis, hepatic fibrosis, and cirrhosis. In the present study, we performed differential gene display analysis (DGDA) to clarify the specific genetic alterations associated with gene expression changes in the course of development of HCC from chronic viral hepatitis.

Cyclophosphamide disrupts hepatic sinusoidal endothelium and improves transplanted cell engraftment in rat liver

Harmeet Malhi, Pallavi annamaneni, Sanjeev Slehria, Brigid Joseph, Kuldeep K. Bhargava, Christopher J. Palestro, Phyllis M. Novikoff, Sanjeev Gupta – 30 December 2003 – To determine whether disruption of the hepatic sinusoidal endothelium will facilitate engraftment of transplanted cells, we treated Fischer 344 (F344) rats lacking dipeptidyl peptidase IV (DPPIV) activity with cyclophosphamide (CP). Electron microscopy showed endothelial injury within 6 hours following CP, and, after 24 and 48 hours, the endothelium was disrupted in most hepatic sinusoids.

Partial external biliary diversion for intractable pruritus and xanthomas in Alagille syndrome

Karan M. Emerick, Peter F. Whitington – 30 December 2003 – Alagille syndrome (AGS) causes intractable pruritus and disfiguring xanthomas because of retained bile acids and cholesterol. This study was performed to determine whether partial external biliary diversion (PEBD) is effective for relief of pruritus and xanthomas in AGS patients who fail conventional medical therapy. Between the years 1985 and 2001, 9 AGS patients underwent PEBD. Complete follow‐up data were available for all patients. The average age at PEBD was 4.8 (range 1.4‐10) years.

Regulation of oxysterol 7α‐hydroxylase (CYP7B1) in primary cultures of rat hepatocytes

William M. Pandak, Phillip B. Hylemon, Shunlin Ren, Dalila Marques, Gregorio Gil, Kaye Redford, Darrell Mallonee, Z. Rano Vlahcevic – 30 December 2003 – Conversion of cholesterol into 7α‐hydroxylated bile acids is a principal pathway of cholesterol disposal. Cholesterol 7α‐hydroxylase (CYP7A1) is the initial and rate‐determining enzyme in the “classic” pathway of bile acid synthesis. An “alternative” pathway of bile acid synthesis is initiated by sterol 27‐hydroxylase (CYP27) with subsequent 7α‐hydroxylation of 27‐hydroxycholesterol by oxysterol 7α‐hydroxylase (CYP7B1).

Subscribe to