Linked Life Data

19646088

Source:http://linkedlifedata.com/resource/pubmed/id/19646088

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2009-8-3
pubmed:abstractText
A comparison was made in the plasma concentration of the major metabolites of amoxicillin (AMO), i.e. amoxicilloic acid (AMA) and amoxicillin diketopiperazine-2',5'-dione (DIKETO) in portal and jugular venous plasma after oral (p.o.) and intravenous (i.v.) AMO administration to pigs, in order to study a possible presystemic degradation of AMO in the gastro-intestinal tract and liver. Almost identical plasma concentration-time curves were obtained for AMO and its metabolites in portal and jugular venous plasma, both after p.o. and i.v. AMO administration. Almost immediately after i.v. AMO administration, high AMA and DIKETO concentrations were measured in plasma, while after p.o. dosing, the metabolites appeared in plasma after almost complete absorption of AMO. No significant differences in pharmacokinetic parameters of AMO, AMA and DIKETO, derived from the concentration-time profiles in portal and jugular venous plasma were calculated, both after i.v. and p.o. AMO administration (P > 0.05). After p.o. administration, the half-life of elimination (t(1/2(el))) for AMA is at least two or three times the t(1/2(el)) of AMO (0.75 h for AMO vs. 2.69 h for AMA), indicating the slower clearance of the metabolite. It could be hypothesized that AMA is only eliminated by glomerular filtration, as its open beta-lactam structure might not be recognized by the transport carrier in the proximal tubule of the kidney. The results of the study indicate that AMO is not substantially metabolized presystemically in the gut and liver. Therefore, it may be assumed that the kidney may be the major organ for AMO biotransformation. Future in vivo and in vitro experiments should be performed to state this hypothesis.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
1365-2885
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
32
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
241-8
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Influence of administration route on the biotransformation of amoxicillin in the pig.
pubmed:affiliation
Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
pubmed:publicationType
Journal Article