Pigment gallstone formation in the cholesterol‐fed guinea pig

Wayne W. Lamorte, Erica A. Brotschi, Thayer E. Scott, Lester F. Williams – 1 January 1985 – Female Hartley guinea pigs fed a 0.5% cholesterol‐supplemented diet were found to form pigmented gallstones after 6 weeks (17/23) and 12 weeks (11/11), while only 2 of 44 animals fed a trace cholesterol diet formed gallstones over a comparable period. The light brown stones consisted primarily of aggregates of fine granular crystals, morphologically similar to calcium bilirubinate crystals.

The diagnosis of bacterial peritonitis: Comparison of pH, lactate concentration and leukocyte count

Guadalupe Garcia‐Tsao, Harold O. Conn, Emanuel Lerner – 1 January 1985 – It has been suggested that the hydrogen ion and lactate concentrations may be superior to the polymorphonuclear cell count (PMN) in ascitic fluid, in the diagnosis of bacterial peritonitis (BP). In order to compare the diagnostic accuracy of ascitic fluid measurements of pH, lactate, glucose and the PMN in BP, we analyzed the ascitic fluids of 70 consecutive patients in whom pH, lactate, glucose and the PMN count were measured in ascitic fluid and arterial blood.

Ammonia, octanoate and a mercaptan depress regeneration of normal rat liver after partial hepatectomy

Leslie Zieve, Michael Shekleton, Carolyn Lyftogt, Kay Draves – 1 January 1985 – Four injections of subcoma doses of ammonium acetate, octanoic acid or dimethyl disulfide during the first 24 hr after two‐lobe hepatectomy in normal rats markedly depressed DNA synthesis as reflected by liver thymidine kinase activity or the incorporation of tritiated thymidine into hepatic DNA. Recovery from the depressant effects of the three toxins took 16 to 28 hr.

Increased portal venous resistance hinders portal pressure reduction during the administration of β‐adrenergic blocking agents in a portal hypertensive model

Richard J. Kroeger, Roberto J. Groszmann – 1 January 1985 – We have recently shown that maintenance of portal hypertension in rats is highly dependent on high portal blood flow. This study attempts to determine whether portal hypertension, induced in the rat by partial constriction of the portal vein, can be reduced by lowering portal blood flow with a beta blocking agent.

Reversal of ethanol and indomethacin‐induced suppression of hepatic DNA synthesis by 16,16‐dimethyl prostaglandin E2

Gloria E. McNeil, Thomas S. Chen, Carroll M. Leevy – 1 January 1985 – Investigations were undertaken to determine effectiveness of 16,16‐dimethyl prostaglandin E2 (dmPGE2) in overcoming the suppressive effects of ethanol and/or indomethacin on hepatic DNA synthesis. Adult litter mate Sprague‐Dawley rats were subjected to sham operation or partial hepatectomy. Immediately after partial hepatectomy, and at 8‐hr intervals for 24 hr, the rats were given: (a) ethanol with and without dmPGE2 or (b) indomethacin with and without ethanol and/or dmPGE2.

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