1 June 1994

Gary L. Davis, Johnson Y.‐N. Lau, Mickie S. Urdea, Paul D. Neuwald, Judith C. Wilber, Karen Lindsay, Robert P. Perrillo, Janice Albrecht – 1 June 1994 – To determine the optimal conditions for preparation of serum specimens for quantitative hepatitis C virus RNA determination, patient samples were processed such that differences in time from clot formation to centrifugation, centrifugation to separation of serum and collection of serum until freezing could be independently assessed. The effects of multiple cycles of freezing and thawing were also determined.

1 June 1994

Andres T. Blei, Sigurdur Olafsson, Guy Therrien, Roger F. Butterworth – 1 June 1994 – Brain edema, leading to intracranial hypertension and brain herniation, is a major cause of death in fulminant liver failure. Astrocyte swelling is a prominent neuropathological feature in experimental fulminant liver failure. It has been postulated that the osmotic effects of glutamine, generated in astrocytes from ammonia and glutamate in a reaction catalyzed by glutamine synthetase, could mediate brain swelling.

Erwin Regoeczi, Paul A. Chindemi, Wei‐Li Hu – 1 June 1994 – The bile contains small quantities of lactoferrin, the origin of which is uncertain. For this reason, we studied the liver's capability of transferring lactoferrin from the plasma to the bile by injecting a dose (10 to 20 μg/100 gm) of labeled bovine lactoferrin intravenously and following its appearance in bile over 3 hr. Whether diferric or iron free, lactoferrin peaked in the bile 35 min after administration (i.e., the same time as bovine lactoperoxidase and diferric rat transferrin).

Meng‐Lun Liu, Wendy M. Mars, Reza Zarnegar, George K. Michalopoulos – 1 June 1994 – Hepatocyte growth factor and transforming growth factor‐α are two well‐known hepatomitogens for primary hepatocyte cultures. Here we report that these two growth factors also stimulate in vivo DNA syntheses in normal, unoperated, adult rat liver after 24‐hr continuous intraportal infusion. As determined by an immunohistochemical staining technique, 5‐bromo‐2′‐deoxyuridine incorporation was increased in a dose‐dependent fashion after infusion of up to 10 μg of growth factor/100 gm body weight in the rat.

Moniek N. Pieters, Sebastiaan Esbach, Donald Schouten, Adriaan Brouwer, Dick L. Knook, Theo J. C. Van Berkel – 1 June 1994 – Human low‐density lipoprotein was labeled in its cholesteryl ester moiety with [3H]cholesteryl oleate or [3H]cholesteryl oleoyl ether and oxidized by exposure to 10 μmol/L of cupric sulfate. The in vivo metabolism of cholesteryl esters of oxidized low‐density lipoprotein was determined after injection into rats.

Cynthia R. Leveille‐Webster, Irwin M. Arias – 1 June 1994 – Two types of P‐glyeoprotein have been found in mammals: the drug‐transporting P‐glycoproteins and a second type, unable to transport hydrophobic anti‐cancer drugs. The latter is encoded by the human MDR3 (also called MDR2) and the mouse mdr2 genes, and its tissue distribution (bile canalicular membrane of hepatocytes, B cells, heart, and muscle) suggests a specialized metabolic function. We have generated mice homozygous for a disruption of the mdr2 gene.

Yanina Makcos, Hugo A. Fainboim, Mónica Capucchio, Jorge Findor, Jorge Daruich, Beatriz Reyes, Marcelo Pando, Graciela Del C. Theiler, Nora Méndez, M. Leonardo Satz, Leonardo Fainboim – 1 June 1994 – We investigated the association of human leukocyte antigen antigens and type 1 chronic active “autoimmune” hepatitis in a population of 65 white Argentinian patients, taking into account the different manifestations of the disease. Standard microlymphocytotoxicity was used for human leukocyte antigen A, B, C, DR and DQ typing.

Eve A. Roberts, Michelle Letarte, Jeremy Squire, Suyun Yang – 1 June 1994 – Four separate continuous lines of human hepatocytes (HH01, HH02, HH09, HH25) were developed from normal liver tissue by subjecting cocultures of human hepatocytes with rat liver epithelial cells in a highly enriched medium to frequent subculturing. The addition of conditioned medium from either the human hepatoma line Hep G2 or one of these stable human hepatocyte lines (HH09) appeared to facilitate establishment of line HH25.