Linked Life Data

2731654

Source:http://linkedlifedata.com/resource/pubmed/id/2731654

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1989-7-27
pubmed:abstractText
The effects of gavage vehicle on the acute toxicity of the naturally occurring nitrile 1-cyano-2-hydroxy-3-butene (CHB) were investigated by oral administration of 200 mg/kg body wt/day CHB to male CDF (F-344/Crl BR) rats for 2 days. The vehicles studied here were distilled water, 5% aqueous Tween 20, and corn oil. Liver, kidney, and pancreas were examined histologically and the differences in lesion incidence and severity were assessed. The effects of gavage vehicle on nitrile-induced elevations of daily urinary thiocyanate excretion and tissue glutathione concentrations were also assessed. The pancreatotoxicity of CHB was present regardless of vehicle and consisted of apoptosis of pancreatic acinar cells, infiltration of pancreatic lobules by macrophages, and acinar atrophy and disorganization. CHB in water alone was associated with the least pancreatotoxic effect, whereas the aqueous Tween vehicle was associated with more severe CHB-induced pancreatic lesions. CHB-induced elevations of tissue nonprotein thiol and glutathione concentrations occurred in all treatment groups, but the values were elevated significantly less in the pancreata of CHB/Tween-treated rats than in those of rats given CHB in water or corn oil. By contrast, the greatest elevation in daily urinary thiocyanate excretion occurred in rats given CHB in aqueous Tween, indicating increased biotransformation of CHB to cyanide when Tween 20 was used as a vehicle. These results illustrate the difficulty of identifying suitable vehicles for administration of lipophilic compounds in toxicology studies.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0272-0590
pubmed:author
pubmed:issnType
Print
pubmed:volume
12
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
377-85
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
The relationship of vehicle to target organ toxicology induced by the naturally occurring nitrile 1-cyano-2-hydroxy-3-butene.
pubmed:affiliation
Department of Pathology, Colorado State University, Fort Collins 80523.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S.