Linked Life Data

16024155

Source:http://linkedlifedata.com/resource/pubmed/id/16024155

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2005-12-12
pubmed:abstractText
Aristolochic acid (AA) has been implicated in urothelial carcinoma in humans. However, the mechanism by which AA induces this cancer has not been completely established. To evaluate the effects of AA on the urinary bladder of rats, a histopathological study of three-month intragastric feeding with mixture of AA (41% AA I, 56% AA II) was carried out. A total of 18 experimental rats were divided into three feeding regimens, with six rats in each group (group I, normal basal diet; groups II and III received intragastric 5 mg and 10 mg isolated AA mixture/kg/day for 5 days/week for 12 weeks). Dosage-dependent urothelial proliferation, but not carcinoma, was found in the urothelium of the bladder of the rats administered with AA mixture. Immunoprecipitation showed elevations of cyclin D(1)/cdk4 (increased induction by 1.57- and 1.95-fold in the groups II and III) and/or cyclin E/cdk2 complex (increased induction by 1.46- and 1.62-fold in the groups II and III), which promote the increasing phosphorylation of Rb (increased induction by 1.75- and 2.07-fold in the groups II and III) and result in decrease of the Rb/E2F complex (decreased expression by 0.65- and 0.24-fold in the groups II and III). Our results provide evidence to suggest that exposure to AA results in urothelial proliferation in rats through cell cycle progression via activation of cyclin D(1)/cdk4 and cyclin E/cdk2.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0278-6915
pubmed:author
pubmed:issnType
Print
pubmed:volume
44
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
28-35
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Induction of urothelial proliferation in rats by aristolochic acid through cell cycle progression via activation of cyclin D1/cdk4 and cyclin E/cdk2.
pubmed:affiliation
Division of Nephrology, Department of Internal Medicine, Chung-Shan Medical University Hospital, Taichung, Taiwan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't