Linked Life Data

1524605

Source:http://linkedlifedata.com/resource/pubmed/id/1524605

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1992-10-20
pubmed:abstractText
The effects of chronic moderate (15%) ethanol consumption and ageing on rat hepatic cytochrome P450 monooxygenase activities were examined using diazepam, nordazepam, d-benzphetamine, erythromycin, ethylmorphine and nitrosodimethylamine (NDMA) as substrates. In addition, the effects of moderate ethanol alone on the oxidation of metoprolol, morphine and temazepam were examined. Cytochrome P450 specific content increased significantly only in the 6-week ethanol-treated rats, and no changes in percentage liver to body weights were apparent in any of the ethanol-treated animals compared with pair-fed controls. Only cytochrome P450IIIA enzyme activities displayed age-related decreases, these being identified in the pair-fed animals. C3-hydroxylation of diazepam and nordazepam (36% of controls) and N-demethylation of erythromycin and ethylmorphine (58% and 64% of controls) were decreased in 6-week ethanol-treated animals, these effects being less pronounced in the 12, 24 and 48-week ethanol-treated groups. The decrease seen for diazepam and d-benzphetamine N-demethylation caused by ethanol consumption was approximately 80% of control groups for the duration of the treatment. NDMA and morphine N-demethylations were increased to 120% of control activities and metoprolol alpha-hydroxylase was increased to 140% of control activities at 6 weeks, whilst metoprolol O-demethylase activity remained unaltered. NDMA N-demethylase activity showed a two-fold induction at 24 and 48 weeks of ethanol treatment, compared with corresponding pair-fed control groups. These results support previous findings from this laboratory showing that the same or similar P450IIIA family isozymes are involved in the C3-hydroxylation of diazepam and nordazepam.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0735-0414
pubmed:author
pubmed:issnType
Print
pubmed:volume
27
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
143-52
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Benzodiazepine metabolism in ethanol-treated male rats: use of pair-fed and age-matched controls.
pubmed:affiliation
Department of Biochemistry, University of Queensland, Brisbane, Australia.
pubmed:publicationType
Journal Article, Comparative Study