Linked Life Data

15744718

Source:http://linkedlifedata.com/resource/pubmed/id/15744718

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2005-4-19
pubmed:abstractText
It was reported that the mean value of the extent of absolute oral bioavailability (F) of oltipraz at a dose of 20 mg/kg was 41.2% and only 2.68% of the oral dose was unabsorbed from the gastrointestinal tract in rats. Hence, the low F in rats could be due to considerable first-pass (gastric, intestinal and hepatic) effects. Hence, the first-pass effects of oltipraz were measured after intravenous, intraportal, intragastric and intraduodenal administration of the drug at a dose of 20 mg/kg to rats. The total area under the plasma concentration-time curve from time zero to time infinity (AUC) values between intragastric and intraduodenal administration (213 and 212 microg min/ml) in rats were almost similar, but the values were significantly smaller than that after intraportal administration (316 microg min/ml) in rats, indicating that gastric first-pass effect was almost negligible (due to negligible absorption of oltipraz from rat stomach), but the intestinal first-pass effect of oltipraz was considerable, approximately 32% of the oral dose. The hepatic first-pass effect of oltipraz was approximately 40% based on AUC values between intravenous and intraportal administration (319 versus 536 microg min/ml). Since approximately 65% of the oral oltipraz was absorbed into the portal vein, the value of 40% was equivalent to 25% of the oral dose. The low F of oltipraz in rats was mainly due to considerable hepatic and intestinal first-pass effects.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0142-2782
pubmed:author
pubmed:copyrightInfo
Copyright (c) 2005 John Wiley & Sons, Ltd.
pubmed:issnType
Print
pubmed:volume
26
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
129-34
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
Hepatic and intestinal first-pass effects of oltipraz in rats.
pubmed:affiliation
College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, San 56-1, Shinlim-Dong, Kwanak-Gu, Seoul 151-742, Republic of Korea.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't