cholestasis/phosphatase

OBJECTIVE To determine the mechanism by which liver alkaline phosphatase (LALP) isoenzyme is converted from a membrane-bound enzyme to the soluble enzyme during cholestasis. METHODS Serum and tissues from 2 dogs. METHODS The LALP was purified by use of affinity chromatography in samples of serum

This study characterizes a syndrome of partial common bile duct obstruction and marked elevation in serum alkaline phosphatase in 6 male alcoholic patients with calcific pancreatitis. In each patient, a marked elevation in serum alkaline phosphatase was associated with minimal, if any, elevation in

We studied the value of alkaline phosphatase (AP), gamma-glutamyl transpeptidase (GGT), and 5'-nucleotidase (5'-NU) activities in the diagnosis of intrahepatic (IHC) versus extra-hepatic cholestasis (EHC). Eighty patients were included prospectively. All presented with cholestasis as defined by a

Alkaline phosphatase isoenzymes (API) in serum of rats during cholestasis are investigated. For comparison different membrane systems in liver are damaged. Proliferation of bile canaliculi, sinusoidal area, and endoplasmic reticulum, respectively, is induced by different toxic conditions. It is

The effects of obstructive cholestasis on the activity of alkaline phosphatase have been extensively studied in serum and liver tissue. However, very little is known about the activity of this enzyme in the postcholestatic condition after relief of the biliary obstruction. The purpose of this study

We reviewed charts of 38 Patients who developed cholestasis whilst receiving total parenteral nutrition (TPN). A standard protocol was followed for administration of TPN and included crystalline amino acid solution with lipid emulsion and dextrose as calorie sources. 5 of the 38 patients did not

Bile acids induce synthesis of alkaline phosphatase by cultured hepatocytes. To test whether bile acids account for this enzyme's elevation during cholestasis, we developed an experimental model in which the content of the bile acid pool is controlled at the beginning of cholestasis. After depleting

The activities of lysosomal maltase in the serum, bile and liver were determined in intrahepatic cholestasis rats induced by alpha-naphtylisothiocyanate (ANIT, 200 mg/kg, i.p.), and compared with changes in alkaline phosphatase (ALP) activity. Moreover, the influences of endogenous bile acids on the

The optimum pH of serum alkaline phosphatase (alk. P., EC 3.1.3.1) was investigated in adult male rats, mice and rabbits after fasting or after the induction of cholestasis by a single oral dose of 200 mg/kg alpha-naphthylisothiocyanate (ANIT). The nature of serum alk.P. was also studied with the

Alkaline phosphatase (ALP) fast liver isoenzyme is now known as high-molecular-weight ALP. This ALP isoenzyme represents fragments of hepatic cell plasma membranes with various membrane-bound enzymes localized on the surface. High-molecular-weight ALP isoenzyme is present in patients' serum samples

The process of cholestasis in both man and rat leads in the majority of cases to the appearance of a biliary band in the electrophoresis of alkaline phosphatase isoenzymes. In this article, the biochemical nature and mode of formation of the biliary band is discussed, with reference to its

Acid phosphatase, alkaline phosphatase and 5'-nucleotidase activities were analyzed cytophotometrically in cryostat sections of rat liver up to 8 weeks after ligation and transsection of the common bile duct. Ligation resulted in cholestasis and induced alterations in both localization and activity

We studied the induction of hepatic alkaline phosphatase by colchicine, a drug which impairs bile flow. By analogy to bile duct obstruction, where retained bile acids induce alkaline phosphatase, we hypothesized that the mechanism of induction involves the drug's cholestatic property and subsequent

In experimental bile obstruction the serum activities of the membrane-bound liver enzymes, alkaline phosphatase, 5'-nucleotidase and gamma-glutamyltransferase are greatly increased, whereas in the liver only the alkaline phosphatase activity is elevated. After partial hepatectomy or tetrachloride

Lipoprotein X is considered to be an indicator of cholestasis, but its clinical usefulness is unclear owing to different methods of measurement in use and varying definitions of cholestasis. We investigated the reliability of the qualitative determination of lipoprotein X in predicting cholestasis,