Document Detail

The acute effects of mono(2-ethylhexyl)phthalate (MEHP) on testes of prepubertal Wistar rats.
MedLine Citation:
PMID:  11397558     Owner:  NLM     Status:  MEDLINE    
A single oral dose of 400 mg/kg body weight of mono(2-ethylhexyl)phthalate (MEHP), the testis toxic metabolite of di(2-ethylhexyl)phthalate, was given to 28-day-old male Wistar rats and the testis toxic effects were investigated 3,6, and 12 h after exposure. Detachment and sloughing of germ cells were observed, and in the Sertoli cells the cytoplasmatic intermediate filament vimentin collapsed. In the immunohistochemical investigation the androgen receptor distribution was unchanged between the control group and treated groups. The expression of the testosterone-repressed-prostatic-message-2 gene in rat testis increased after 3 h, but returned to control levels after 6 and 12 h. Caspase-3 activity increased 3 and 12 h after MEHP exposure. This increase could not be correlated to an increase in DNA fragmentation or increase in apoptotic numbers of germ cells. In conclusion, the effect of MEHP in testis is apparently not involving the androgen receptor. Vimentin localisation in the Sertoli cells, and increased levels of caspase-3 activity appear to be sensitive and early markers of MEHP testis toxicity.
M Dalgaard; C Nellemann; H R Lam; I K Sørensen; O Ladefoged
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Toxicology letters     Volume:  122     ISSN:  0378-4274     ISO Abbreviation:  Toxicol. Lett.     Publication Date:  2001 May 
Date Detail:
Created Date:  2001-06-08     Completed Date:  2001-07-26     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7709027     Medline TA:  Toxicol Lett     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  69-79     Citation Subset:  IM    
Danish Veterinary and Food Administration, Institute of Food Safety and Toxicology, Mørkhøj Bygade 19, 2860 Søborg, Denmark.
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MeSH Terms
Apoptosis / genetics
Caspase 3
Caspases / genetics,  metabolism
DNA / drug effects,  metabolism
Diethylhexyl Phthalate / analogs & derivatives,  toxicity*
Gene Expression Regulation / drug effects
Glycoproteins / genetics,  metabolism
In Situ Nick-End Labeling
Molecular Chaperones / genetics,  metabolism
Rats, Wistar
Testis / drug effects*,  metabolism,  pathology
Time Factors
Vimentin / metabolism
Reg. No./Substance:
0/Clusterin; 0/Glycoproteins; 0/Molecular Chaperones; 0/Vimentin; 117-81-7/Diethylhexyl Phthalate; 4376-20-9/mono-(2-ethylhexyl)phthalate; 9007-49-2/DNA; EC 3.4.22.-/Casp3 protein, rat; EC 3.4.22.-/Caspase 3; EC 3.4.22.-/Caspases

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