Phospholipids and bile acids as diffusional carriers of Na+ across nonpolar media

Luigi Accatino, Patricia Gavilan – 1 July 1988 – Phospholipids and bile acids, by virtue of their amphiphilic properties, can interact in nonpolar media forming “inverted” structures (micelles) which presumably have an hydrophilic core and might act as diffusional carriers (ionophores) of electrolytes across low dielectric constant media or lipid membranes.

Thallium‐201 per rectum for the diagnosis of cirrhosis in patients with asymptomatic chronic hepatitis

Agesilao D'Arienzo, Luigi Celentano, Alessandro Scuotto, Pasqualina Di Siervi, Vinicio Lombardi, Giovanni Squame, Gabriele Mazzacca – 1 July 1988 – In normal subjects, thallium‐201, administered per rectum, is taken up mainly by the liver (heart/liver ratio in normal subjects: 0.04 to 0.12). It has been claimed that an increased heart/liver ratio is suggestive of portal‐caval shunting and portal hypertension.

Characterization of H+ efflux pathways in rat hepatocytes

M. Sawkat Anwer, Kathleen Nolan – 1 July 1988 – A pH‐stat method was used to characterize H+ efflux pathways in hepatocytes in order to determine if Na+/ H+ and Ca++/H+ exchange are involved in H+ efflux from hepatocytes under basal conditions and if cyclic AMP analogs affect Na+/H+ exchange. Total H+ efflux of freshly prepared hepatocytes ranged from 10 to 15 nmoles per min per mg protein. A part of total H+ efflux (35 to 50%) was dependent on extracellular Na+.

Effects of vasopressin on the intravariceal pressure in patients with cirrhosis: Comparison with the effects on portal pressure

Jaime Bosch, Josep M. Bordas, Ricardo Mastai, David Kravetz, Miquel Navasa, Jaime Chesta, M. Pilar Pizcueta, Juan C. García‐Pagán, Joan Rodés – 1 July 1988 – The present study investigated to what extent measurements of wedged and free hepatic venous pressures adequately reflect the effects of vasopressin at the esophageal varices in patients with cirrhosis.

IgG and IgM autoantiidiotype antibodies against antibody to HBsAg in chronic hepatitis B

Miren Zuriñe Ibarra, Ignacio Mora, Juan Antonio Quiroga, Javier Bartolomé, Faustino La Banda, Juan Carlos Porres, Vicente Carreño – 1 July 1988 – Antibody directed against HBsAg carries idiotypic determinants that may induce an autoantiidiotype antibody response. We describe a solid‐phase radioimmunoassay which allows specific detection of either IgG or IgM antibody to antibody directed against HBsAg. Among 138 chronic hepatitis B virus carriers, IgG autoantiidiotype was detected in 98 (71%) and IgM autoantiidiotype in 110 (80%).

Isolation of a human hepatic ferritin receptor

Paul C. Adams, Lawrie W. Powell, June W. Halliday – 1 July 1988 – A human hepatic ferritin receptor has been isolated from human liver and has been purified using affinity chromatography. An affinity constant of 6.0 × 108 moles−1 liter was determined for the ferritin receptor. The molecular weight was estimated to be approximately 53,000 by gel electrophoresis. Binding of ferritin to the receptor coupled to a microparticulate support was specific for human liver ferritin with no binding of rat or porcine ferritin.

Monoconjugated bilirubin is a major component of hemolysis‐induced gallstones in mice

Bruce W. Trotman, C. Rajagopalan Nair, Seldon E. Bernstein – 1 July 1988 – The role of bilirubin conjugates in the formation of pigment gallstones is not known. In this study, we completely solubilized and then analyzed by high‐performance liquid chromatography specimens of black pigment gallstones from eight nb/nb mice with hereditary hemolytic anemia. Each dried gallstone specimen of about 200 μg was dissolved in 5 ml of dimethyl sulfoxide/0.15 M HCl/50 mM disodium‐EDTA (8:1:1 by volume) at room temperature.

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