Increasing hepatic cholesterol 7α‐hydroxylase reduces plasma cholesterol concentrations in normocholesterolemic and hypercholesterolemic rabbits

G Xu, G Salen, S Shefer, G C Ness, L B Nguyen, G S Tint, T S Parker, J Roberts, A K Batta, T S Chen, Z Zhao, X Kong – 1 October 1996 – The effect of bile acid depletion and replacement with glycodeoxycholic acid on plasma cholesterol concentrations, hepatic low‐density lipoprotein (LDL) receptor binding and messenger RNA (mRNA) levels, and hepatic activities and mRNA levels for 3‐hydroxy‐3‐methylglutaryl coenzyme A (HMG‐CoA) reductase and cholesterol 7α‐hydroxylase was investigated in 19 New Zealand white (NZW) and 15 Watanabe heritable hyperlipidemic (WHHL) rabbits.

Subcellular distribution of glucocorticoid receptor in cultured rat and human liver‐derived cells and cell lines: Influence of dexamethasone

D Raddatz, M Henneken, T Armbrust, G Ramadori – 1 October 1996 – Glucocorticoid receptor (GR) distribution in isolated rat hepatocytes and nonparenchymal hepatic stellate cells, Kupffer cells, and liver fibroblasts with and without dexamethasone treatment was investigated by immunostaining and confocal laser scanning microscopy. In addition, human liver fibroblasts, Hep3B and HepG2 cells were investigated. Subcellular distribution of GR immunostaining was assessed semiquantitatively by digital image analysis.

Alterations in enzymatic functions in hepatocytes and hepatocellular carcinomas from Ras‐transduced livers resemble the effects of insulin

R V Pearline, Y Lin, K J Shen, E M Brunt, W M Bowling, D G Hafenrichter, S Kennedy, M W Flye, K P Ponder – 1 October 1996 – An understanding of how oncogenes affect differentiated liver functions might lead to improved treatments for liver cancer or other disorders where liver‐specific functions are compromised. A retroviral vector that coexpressed β‐galactosidase (β‐gal) and activated Ras genes (Ras‐gal) was transduced into a small fraction of adult rat hepatocytes in vivo.

Influence of dietary fat on the effect of endotoxin on murine hepatic peroxisomes

J G DeLamatre, J T Schilleci, L H Hanson – 1 September 1996 – This study investigates the effects of either a high‐fat diet or endotoxin on peroxisome metabolism as assessed by measuring catalase activity, catalase mass, and peroxisomal β‐oxidation. Three mouse strains C3H/HeJ, BALB/c, and C57BL/6J were fed either a low‐fat or a high‐fat diet and injected intraperitoneally with 1 microg Escherichia coli lipopolysaccharide. These parameters were not different in C3H/HeJ mice fed a high‐fat diet compared with controls fed a low‐fat diet.

Detection of circulating donor deoxyribonucleic acid by microsatellite analysis in a liver transplant recipient

Michael Burt, Elizabeth Jazwinska, Stephen Lynch, Paul Kerlin, Devinder Gill, Charles Steadman, Julie Jonsson, Russell Strong, Elizabeth Powell – 1 September 1996 – The diagnosis of graft‐versus‐host disease following liver transplantation may be delayed because the clinical and pathological features are nonspecific. We report the use of microsatellites to support a diagnosis of GVHD in a patient who developed fever and a skin rash 28 days after liver transplantation.

Bile ductule formation in fetal, neonatal, and infant livers compared with extrahepatic biliary atresia

J Cocjin, P Rosenthal, V Buslon, L Luk, L Barajas, S A Geller, B Ruebner, S French – 1 September 1996 – The cell of origin of intrahepatic bile ducts during fetal development remains a subject of controversy, although there has been recent evidence that they form from hepatocytes. However, the origin of neoductules and ducts in the setting of liver disease has not been extensively investigated in humans.

Differential induction of carcinogen metabolizing enzymes in a transgenic mouse model of fulminant hepatitis

I Chemin, S Takahashi, C Belloc, M A Lang, K Ando, L G Guidotti, F V Chisari, C P Wild – 1 September 1996 – The objective of this work is to examine the possible modulation of carcinogen metabolism (activation by cytochrome P450s and detoxification by conjugation via glutathione S‐transferases [GST]) in relation to hepatitis B virus (HBV)‐associated liver injury.

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