Linked Life Data

2599155

Source:http://linkedlifedata.com/resource/pubmed/id/2599155

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
1990-2-5
pubmed:abstractText
In toxicological studies, the test compound FOE 3440 A, a [(3,5-dichloro-2-pyridyl)oxy]phenoxypropanoate with herbicidal properties, produced a severe increase in weight and an intensive induction of monoxygenases activity in the mouse, but not in the rat. Comparative subacute studies were performed with oral administration of 0, 5, 20 and, in some instances, 80 mg kg-1 body weight to mice, rats, hamsters, dogs and rhesus monkeys. Liver enzyme activities were measured. The evaluation of the enzyme activity results showed an unusually severe dose-related induction of the monooxygenases [7-ethoxycoumarin-O-deethylase (EOD), 7-ethoxyresorufin-O-deethylase (EOR) and aldrin epoxidase (ALD)] in the mouse and a much weaker reaction in the other species tested. This exceptional position of the mouse was also demonstrated in vitro by a cytochrome P-450 interaction (inhibition of ALD). The primary metabolite of FOE 3440 A produced a distinct inhibition of the ALD in mice liver microsomes. There were no interactions for the other species. Tests for this cytochrome P-450 interaction using microsomes from three different human livers gave no indications of an inhibition in any case. The 'phenoxypropanoic acid' moiety of FOE 3440 A is structurally similar to the pharmaceutical clofibrate, a familiar model substance for peroxisome proliferation. In order to answer the question of whether peroxisome proliferation is the second mechanism for affecting liver, the carnitine acetyl transferase activity (CA-T), a marker enzyme for peroxisome proliferation, was determined in all liver samples from the comparative species studies. The most striking result of the measurement of CA-T activity was the very large increase in the male rat in the low dose group of 5 mg kg-1. Lesser increases in the CA-T activity were measured in the female rat, the mouse, and also in the 20 mg kg-1 group of the hamster. By comparison, the changes of the activity in dog and monkey were very small. Comparative studies in mouse and hamster using a model substance described in the literature (1,4-bis[2-(3,5-dichloropyridyloxy]-benzene (TCPOBOP] indicated that the '3,5-dichloropyridyloxy' moiety of FOE 3440 A is responsible for the induction of the monooxygenases in the mouse and the 'phenoxypropanoic acid' moiety for the peroxisome proliferation in rodents.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0265-203X
pubmed:author
pubmed:issnType
Print
pubmed:volume
6 Suppl 1
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
S41-55
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:2599155-7-Alkoxycoumarin O-Dealkylase, pubmed-meshheading:2599155-Animals, pubmed-meshheading:2599155-Carnitine O-Acetyltransferase, pubmed-meshheading:2599155-Cricetinae, pubmed-meshheading:2599155-Cytochrome P-450 CYP1A1, pubmed-meshheading:2599155-Cytochrome P-450 Enzyme System, pubmed-meshheading:2599155-Dogs, pubmed-meshheading:2599155-Enzyme Induction, pubmed-meshheading:2599155-Female, pubmed-meshheading:2599155-Humans, pubmed-meshheading:2599155-Liver, pubmed-meshheading:2599155-Macaca mulatta, pubmed-meshheading:2599155-Male, pubmed-meshheading:2599155-Mice, pubmed-meshheading:2599155-Microbodies, pubmed-meshheading:2599155-Mixed Function Oxygenases, pubmed-meshheading:2599155-Oxidoreductases, pubmed-meshheading:2599155-Pyridines, pubmed-meshheading:2599155-Rats, pubmed-meshheading:2599155-Rats, Inbred Strains, pubmed-meshheading:2599155-Silicon, pubmed-meshheading:2599155-Species Specificity, pubmed-meshheading:2599155-Trimethylsilyl Compounds
pubmed:year
1989
pubmed:articleTitle
Difference between species in response to a 3,5-dichloropyridyloxyphenoxy compound: induction of cytochrome P-450 and/or peroxisome proliferation.
pubmed:affiliation
Fachbereich Toxikologie, Bayer AG, Wuppertal, FR Germany.
pubmed:publicationType
Journal Article, Comparative Study