显示 1-23 共 23 条结果 关于 "P0376"
W E Kurtin et al.
Analytical biochemistry, 147(2), 511-516 (1985-06-01)
A method for improving the assay of beta-glucuronidase in hepatic and gallbladder bile is described. The method uses ion-pair extraction with N,N,N-triheptyl-1-heptanaminium bromide to remove pigments and bile acids. Conjugated bilirubin, unconjugated bilirubin, and taurine and glycine conjugates of deoxycholic...
Miklós Csala et al.
Biochemical pharmacology, 68(7), 1353-1362 (2004-09-04)
The transport of glucuronides across the endoplasmic reticulum membrane is an important step in the overall process of biotransformation, although the mechanism remains unclear and the participating transporters are unidentified. Using a rapid filtration assay in combination with liquid chromatography-mass...
M Tugnait et al.
Journal of pharmaceutical and biomedical analysis, 9(10-12), 895-899 (1991-01-01)
Preliminary studies have been undertaken to evaluate the potential of immobilized phenylboronic acid (PBA) for the solid-phase extraction (SPE) of glucuronide metabolites from urine. These studies have demonstrated that immobilized PBA can be used to specifically extract phenolphthalein glucuronide (5...
Chromogenic substrates II. Phenolphthalein glucuronic acid as substrate for the assay of glucuronidase activity
Talalay P, et al.
The Journal of Biological Chemistry, 166(2), 757-772 (1946)
Inhibitory effect of bile acids on the activity of human beta-glucuronidase at its optimal pH.
K J Ho et al.
Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.), 167(3), 304-309 (1981-07-01)
Z K Sharaiha et al.
Digestive diseases and sciences, 28(9), 827-832 (1983-09-01)
Phenolphthalein is an odorless, tasteless compound, poorly soluble in water, but readily soluble in alcohol or ether. Although its laxative activity was discovered in 1902, the mechanism of action remains unclear. Phenolphthalein has been found to be an ineffective laxative...
L K Griffeth et al.
Drug metabolism and disposition: the biological fate of chemicals, 13(4), 391-397 (1985-07-01)
A previously validated small mammal trauma model, hind-limb ischemia secondary to infrarenal aortic ligation in the rat, was utilized to investigate the effects of traumatic injury on hepatic glucuronidation activity. As was previously observed with hepatic oxidative drug metabolism, model...
Takahiro Sasamoto et al.
Journal of gastroenterology and hepatology, 21(1 Pt 1), 26-31 (2006-05-19)
There are several reports on the biliary excretion of bile acids and organic anions in zone 1- and zone 3-injured rat liver, but the results are controversial. In order to dissolve the discrepancy between previous works about the role of...
Adam G Staines et al.
Analytical biochemistry, 342(1), 45-52 (2005-06-17)
A primary reason for poor characterization of microsomal transport to date is the limitations of the measurement techniques used. Radiodetection provides sufficient sensitivity, but it can be applied only when labeled analogue is available. In this article, we report the...
Improvement in intestinal function and health by the peel fiber derived from Citrus sinensis L cv Liucheng
Chi-Fai Chau, Fuu Sheu, Ya-Ling Huang and Li-Hung Su
Journal of the Science of Food and Agriculture, 85, 1211-1216 (2005)
[9] Preparation and assay of substrates for $\beta$-glucuronidase
Fishman WH
Methods in Enzymology (1957)
J A Wilhelm et al.
Journal of chromatography, 578(2), 231-238 (1992-07-24)
A procedure is described to simultaneously quantitate phenolphthalein and its glucuronide metabolite from dog serum, urine and bile using high-performance liquid chromatography. The major advantages of this over pre-existing methods include direct analysis of the parent compound and glucuronide metabolite...
[9] Preparation and assay of substrates for $\beta$-glucuronidase
Fishman WH
Test (1957)
M Csala et al.
Biochemical pharmacology, 59(7), 801-805 (2000-03-16)
The physiological function of microsomal beta-glucuronidase is unclear. Substrates may be either glucuronides produced in the lumen of endoplasmic reticulum (ER) or those taken up by hepatocytes. In the latter case, efficient inward transport of glucuronides at the plasma membrane...
Y C Ho et al.
Enzyme, 33(1), 9-17 (1985-01-01)
beta-Glucuronidase (EC 3.2.1.31) was purified from human liver and its activity was determined by enzyme kinetic method employing phenolphthalein glucuronic acid (PGA) and conjugated bilirubin, primarily bilirubin diglucuronide purified from human bile, as substrates in the absence or presence of...
B S Anand et al.
Alimentary pharmacology & therapeutics, 8(5), 559-562 (1994-10-01)
Phenolphthalein is widely used as a safe and effective laxative. After oral administration, phenolphthalein is absorbed in the small bowel and is conjugated in the liver to phenolphthalein glucuronide which passes into the colon where it is deconjugated and the...
L G Rochelle et al.
Toxicology, 86(1-2), 123-134 (1994-01-26)
Chlordecone (CD) impairs biliary excretion of organic anions (including phenolphthalein glucuronide (PG), imipramine polar metabolites, and taurocholate) without evidence of hepatocellular necrosis in rats. In this study we investigated the hypothesis that CD-induced hepatobiliary dysfunction is dependent on CD concentration...
Shey-Cherng Tzou et al.
Radiology, 252(3), 754-762 (2009-09-01)
To develop a new glucuronide probe for micro-positron emission topography (PET) that can depict beta-glucuronidase (betaG)-expressing tumors in vivo. All animal experiments were preapproved by the Institutional Animal Care and Use Committee. A betaG-specific probe was generated by labeling phenolphthalein...
W H Peters et al.
Biochimica et biophysica acta, 873(2), 252-259 (1986-09-26)
Evidence was found for UDPglucuronyltransferase-catalysed deconjugation of p-nitrophenol-, 4-methylumbelliferone- and phenolphthalein-glucuronides. The evidence is based on the following observations: 1, deconjugation is UDP-dependent and the reactions show Michaels-Menten kinetics with respect to UDP and glucuronide saturability; 2, UDP-glucuronic acid was...
Z Gregus et al.
The Journal of pharmacology and experimental therapeutics, 225(2), 256-262 (1983-05-01)
Hepatic levels of uridine diphosphoglucuronic acid (UDPGA) in rats decreased substantially (greater than 80%) 40 min after galactosamine (GAL) (600 mg/kg i.p.) or after 1 hr of diethyl ether (DE) narcosis. Biliary excretion of several cholephils requiring glucuronidation before excretion...
G Bánhegyi et al.
The Biochemical journal, 315 ( Pt 1), 171-176 (1996-04-01)
The transport of glucuronides synthesized in the luminal compartment of the endoplasmic reticulum by UDP-glucuronosyltransferase isoenzymes was studied in rat liver microsomal vesicles. Microsomal vesicles were loaded with p-nitrophenol glucuronide (5 mM), phenolphthalein glucuronide or UDP-glucuronic acid, by a freeze-thawing...
Tatsuyuki Marumo et al.
Journal of gastroenterology, 39(10), 981-987 (2004-11-19)
Hepatocytes in zone 1 of the hepatic lobule play a role in the uptake and biliary excretion of bile acids and organic anions under physiological conditions, and hepatocytes in zone 3 may play a role only when there is a...
C V Rao et al.
Biochemical pharmacology, 42(12), 2323-2332 (1991-11-27)
A number of toxic chemicals affect the biliary excretory function of liver. Organochlorines and halomethanes are known to enhance bile flow. Despite the demonstration that a diversity of agents modify biliary function, the mechanism by which these chemicals manifest this...

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