Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1992-12-31
pubmed:abstractText
Interactions between 1,2,3,7,8-pentachlorodibenzo-p-dioxin (PnCDD) and 2,4,5,2',4',5'-hexachlorobiphenyl (HxCB) on hepatic retention of PnCDD and on cytochrome P450 related enzyme activities were studied in male C57BL/6J mice. Animals received 8 nmol PnCDD/kg orally, alone or in combination with 1-416 mumol HxCB/kg. Co-administration of HxCB did not alter the hepatic retention of PnCDD or the 7-ethoxyresorufin-O-deethylation (EROD) activity induced by PnCDD as observed after 1 week. A small antagonistic effect on total cytochrome P450 content and 7-pentoxyresorufin-O-depentylation (PROD) activity was observed at a dose of 8 nmol PnCDD/kg and 1 mumol HxCB/kg. Furthermore, a significant induction of PROD activity by PnCDD was found. This was not expected, since PROD activity is considered to be a specific marker for CYP2b related enzyme activity and this type of cytochrome P450 is not induced by polychlorinated dibenzo-p-dioxins such as PnCDD. It is concluded that, under these short-term experimental conditions, no toxicokinetic basis was found to explain the antagonistic effects on hepatic cytochrome P450 related activities observed in the present study or in other studies.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0300-483X
pubmed:author
pubmed:issnType
Print
pubmed:volume
75
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
21-8
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Absence of interactions on hepatic retention and 7-ethoxyresorufin-O-deethylation activity after co-administration of 1,2,3,7,8-pentachlorodibenzo-p-dioxin and 2,4,5,2',4',5'-hexachlorobiphenyl.
pubmed:affiliation
Research Institute of Toxicology, University of Utrecht, The Netherlands.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't