Raymond S. Koff – 1 January 1992

Jorge J. Gumucio, Richard H. Moseley – 1 January 1992 – Previous studies in cultured rat hepatocytes revealed that initial uptake of sulfobromophthalein (BSP) was markedly reduced upon removal of Cl− from the medium. In the present study, unidirectional Cl− gradients were established in short‐term cultured rat hepatocytes and their effect on BSP uptake was determined. These investigations revealed that BSP uptake requires external Cl− and is not stimulated by unidirectional Cl− gradients, suggesting that BSP transport is not coupled to Cl− transport.

Jonathan L. Brown, William F. Carman, Howard C. Thomas – 1 January 1992 – Although HBV has a circular DNA genome that is partially double stranded, it replicates by means of an RNA intermediate. The process is catalyzed by a translation product of the polymerase open reading frame that has reverse transcriptase activity. The enzyme is found in association with the virion and achieves a high rate of nucleotide misincorporation during transcription because such enzymes lack proofreading activity.

Joseph M. Alcorn, Joshua Fierer, Mario Chojkier – 1 January 1992 – D‐Galactosamine is an hepatocyte‐specific inhibitor of RNA synthesis. It has been used to sensitize animals both to the lethal effects of bacterial endotoxin (lipopolysaccharide) and to a principal lipopolysaccharide‐induced mediator of shock, tumor necrosis factor–α. The mechanism by which this sensitization occurs is unknown.

Jacquelyn J. Maher – 1 January 1992 – After partial hepatectomy, the liver is capable of complete regeneration, restoring normal hepatic size, architecture, and function. To study the role of the extracellular matrix in regeneration, the temporal and spatial sequence of deposition of several of its components, including collagen types I, III, and IV, laminin, and fibronectin, in rat liver, after an 80% hepatectomy, was characterized by light microscopy immunohistochemistry. A minimum of five animals were studied for each date.

Takao Inagaki, Susumu Kobayashi, Norio Ozeki, Masahiro Suzuki, Yoshitaka Fukuzawa, Kazuhito Shimizu, Katsuhisa Kato, Katsumi Kato – 1 January 1992 – Ultrastructural identification of light microscopic giant mitochondria was performed on the same specimens for light and electron microscopic observations. The liver tissue specimens were fixed in OsO4, embedded in epoxy resin, cut 4 μm thick and stained with polychrome. At the beginning of the study a light microscopic observation was made, and a microphotograph was taken.

1 January 1992

Yuji Togashi, Yu Li, Jong‐Hon Kang, Noritoshi Takeichi, Yasunori Fujioka, Kazuo Nagashima, Hiroshi Kobayashi – 1 January 1992 – The Long‐Evans Cinnamon rat is a mutant strain that contracts hereditary hepatitis and, eventually, spontaneous hepatocellular carcinoma. Because we found a corresponding gross copper accumulation in the liver of the rats, we examined whether the development of hepatitis in our rat system could be prevented by administration of D‐penicillamine.

Seigo Kitano, Yasunori Iso, Makoto Hashizume, Hirohiko Yamaga, Nobuhiro Koyanagi, Hiroya Wada, Tetsuya Iwanaga, Masayuki Ohta, Keizo Sugimachi – 1 January 1992 – Ninety‐six patients with good liver function (Child class A or B) and esophageal varices were randomly assigned to one of three groups given different treatments: endoscopic injection sclerotherapy (n = 32), esophageal transection (n = 32) or distal splenorenal shunt (n = 32).

Michael H. Nathanson, Anil Gautam, Rafael Bruck, Carlos M. Isales, James L. Boyer – 1 January 1992 – The effects of increases in cytosolic Ca2+ on hepatocyte bile secretion are unknown. A number of agents that alter levels of cytosolic Ca2+ in the hepatocyte also produce hepatic vasoconstriction and activate protein kinase C, which complicates interpretations of their effects on bile secretion.