Z. Reno Vlahcevic, William M. Pandak, Philip B. Hylemon, Douglas M. Heuman – 1 September 1993 – Cholesterol 7αhydroxylase, the rate‐limiting enzyme in the bile acid biosynthetic pathway, is thought to be regulated by hydrophobic bile acids through negative feedback control. The role of cholesterol in the regulation of cholesterol 7αhydroxylase is more controversial, in part because of incomplete understanding of the relationship between the pathways of cholesterol synthesis and degradation.

Phillip Gorden, Donald F. Cyphers, Carol Feld – 1 September 1993

Mark E. Mailliard – 1 September 1993 – Transport of L‐cysteine and a cysteine S‐conjugate, S‐(1,2‐dichlorovinyl)‐L‐cysteine (DCVC) was investigated in rat liver canalicular plasma membrane (cLPM) vesicles. Cysteine uptake into an osmotically active intravesicular space was temperature sensitive and further enhanced by an inwardly directed Na+ gradient.

1 September 1993

Mark G. Swain, John Vergalla, E. Anthony Jones – 1 September 1993 – Endopeptidase 24.11 (enkephalinase), an enzyme known to be present in plasma and liver, is capable of metabolizing a substantial number of bioactive peptides. We measured plasma endopeptidase 24.11 activity in normal subjects and in patients with chronic hepatocellular disease or chronic cholestatic liver disease. The mean level of plasma endopeptidase 24.11 activity was 13 times higher in cholestatic patients than in controls or patients with hepatocellular disease (p < 0.01).

Rebecca W. Van Dyke, Karen V. Root – 1 September 1993 – Treatment with ethinyl estradiol is known to impair bile formation, bile acid transport and Na,K‐ATPase activity, to alter receptor‐mediated endocytosis and transcytosis of IgA and asialoorosomucoid and to affect membrane lipid composition and fluidity.

Bheemappa G. Devi, George I. Henderson, Teri A. Frosto, Steven Schenker – 1 September 1993 – Studies have shown that ethanol at moderate concentrations inhibits epidermal growth factor–dependent replication of fetal rat hepatocytes in culture. This may account for the growth/development impairment associated with fetal alcohol syndrome and decreased liver regeneration in alcoholic liver disease.

1 September 1993

Siddhartha Kar, Ron Jaffe, Brian I. Carr – 1 September 1993 – G‐to‐T transversion at codon 249 of the p53 gene has been shown to be specifically associated with human hepatocellular carcinomas, particularly that subset associated with exposure to the chemical hepatocarcinogen aflatoxin B1. We surveyed 47 North American adult hepatocellular carcinomas and three childhood liver tumors for codon 249 mutation.

Frederic Oberti, Philippe Sogni, Stephane Cailmail, Richard Moreau, Bernard Pipy, Didier Lebrec – 1 September 1993 – Although prostaglandins are thought to be involved in the hyperdynamic circulation of portal hypertension, the role of this substance has not been elucidated. Dose‐response curves, the hemodynamic effects of prostacyclin (20 μg/kg) and its inhibitor indomethacin and measurements of plasma and urinary levels of 6‐keto‐prostaglandin F1α were compared in three groups of six rats each: normal, with portal vein stenosis and with secondary biliary cirrhosis.