Document Detail

Use of suppression-PCR subtractive hybridisation to identify genes that demonstrate altered expression in male rat and guinea pig livers following exposure to Wy-14,643, a peroxisome proliferator and non-genotoxic hepatocarcinogen.
MedLine Citation:
PMID:  10781867     Owner:  NLM     Status:  MEDLINE    
Understanding the genetic profile of a cell at all stages of normal and carcinogenic development should provide an essential aid to developing new strategies for the prevention, early detection, diagnosis and treatment of cancers. We have attempted to identify some of the genes that may be involved in peroxisome-proliferator (PP)-induced non-genotoxic hepatocarcinogenesis using suppression PCR subtractive hybridisation (SSH). Wistar rats (male) were chosen as a representative susceptible species and Duncan-Hartley guinea pigs (male) as a resistant species to the hepatocarcinogenic effects of the PP, [4-chloro-6-(2,3-xylidino)-2-pyrimidinylthio] acetic acid (Wy-14,643). In each case, groups of four test animals were administered a single dose of Wy-14,643 (250 mg/kg per day in corn oil) by gastric intubation for 3 consecutive days. The control animals received corn oil only. On the fourth day the animals were killed and liver mRNA extracted. SSH was carried out using mRNA extracted from the rat and guinea pig livers, and used to isolate genes that were up and downregulated following Wy-14,643 treatment. These genes included some predictable (and hence positive control) species such as CYP4A1 and CYP2C11 (upregulated and downregulated in rat liver, respectively). Several genes that may be implicated in hepatocarcinogenesis have also been identified, as have some unidentified species. This work thus provides a starting point for developing a molecular profile of the early effects of a non-genotoxic carcinogen in sensitive and resistant species that could ultimately lead to a short-term assay for this type of toxicity.
J C Rockett; K E Swales; D J Esdaile; G G Gibson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Toxicology     Volume:  144     ISSN:  0300-483X     ISO Abbreviation:  Toxicology     Publication Date:  2000 Apr 
Date Detail:
Created Date:  2000-06-12     Completed Date:  2000-06-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0361055     Medline TA:  Toxicology     Country:  IRELAND    
Other Details:
Languages:  eng     Pagination:  13-29     Citation Subset:  IM    
Molecular Toxicology Group, School of Biological Sciences, University of Surrey, Guildford, UK.
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MeSH Terms
Carcinogens / toxicity*
Cloning, Molecular
DNA / genetics
DNA Primers
Gene Expression Regulation / drug effects*
Guinea Pigs
Liver / drug effects,  metabolism*
Liver Neoplasms, Experimental / chemically induced*,  pathology
Peroxisome Proliferators / pharmacology*
Pyrimidines / pharmacology*
RNA, Messenger / biosynthesis
Rats, Wistar
Reverse Transcriptase Polymerase Chain Reaction / methods*
Transcription, Genetic / drug effects
Reg. No./Substance:
0/Carcinogens; 0/DNA Primers; 0/Peroxisome Proliferators; 0/Pyrimidines; 0/RNA, Messenger; 50892-23-4/pirinixic acid; 9007-49-2/DNA

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