Document Detail

Effects of mono-n-butyl phthalate on the development of rat embryos: in vivo and in vitro observations.
MedLine Citation:
PMID:  11555328     Owner:  NLM     Status:  MEDLINE    
The present study was conducted to further characterize the embryotoxic effects mono-n-butyl phthalate, a major metabolite of the plasticizer di-n-butyl phthalate, and evaluate its role in the developmental toxicity of di-n-butyl phthalate. The embryotoxic effects of mono-n-butyl phthalate were compared to those of the parent compound di-n-butyl phthalate after a single oral administration of 1.8, 3.6, 5.4, or 7.2 mmol/kg di-n-butyl phthalate or mono-n-butyl phthalate to Sprague-Dawley rats on gestational day 10 (Day 10). Embryos were evaluated for growth and development on Day 12. Both chemicals induced concentration-dependent developmental toxicity (i.e. decreased growth and malformations) which became apparent at 3.6 mmol/kg. Di-n-butyl phthalate and mono-n-butyl phthalate were approximately equally potent and produced qualitatively similar dysmorphogenic effects. Macroscopically, the most common malformations involved the prosencephalon, the optic system, and the mandibular and maxillary processes. In addition, the embryotoxic potential of mono-n-butyl phthalate was evaluated in vitro using the rat whole embryo culture system. Day 10 embryos were cultured for 48 hr in the presence of 0.5 to 5 mM mono-n-butyl phthalate and were then evaluated as the embryos grown in utero. Mono-n-butyl phthalate was a potent direct acting embryotoxicant, causing concentration-related growth retardation and dysmorphogenesis. The spectrum of morphological defects observed in mono-n-butyl phthalate-exposed embryos in vitro was comparable to those seen in vivo in the embryos at the same developmental stage after maternal administration of di-n-butyl phthalate or mono-n-butyl phthalate. These data provide additional evidence in support of the hypothesis that mono-n-butyl phthalate may be the active species for the developmental toxicity of ingested di-n-butyl phthalate in rats.
A M Saillenfait; I Langonné; B Leheup
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Publication Detail:
Type:  Comparative Study; In Vitro; Journal Article    
Journal Detail:
Title:  Pharmacology & toxicology     Volume:  89     ISSN:  0901-9928     ISO Abbreviation:  Pharmacol. Toxicol.     Publication Date:  2001 Aug 
Date Detail:
Created Date:  2001-09-13     Completed Date:  2001-10-25     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  8702180     Medline TA:  Pharmacol Toxicol     Country:  Denmark    
Other Details:
Languages:  eng     Pagination:  104-12     Citation Subset:  IM    
National Institute for Research and Safety, Avenue de Bourgogne, B.P. N degrees 27, 54501 Vandoeuvre Cedex, France.
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MeSH Terms
Abnormalities, Drug-Induced*
Dibutyl Phthalate / toxicity
Dose-Response Relationship, Drug
Embryo, Mammalian / drug effects
Embryonic and Fetal Development / drug effects
Organ Culture Techniques
Phthalic Acids / toxicity*
Rats, Sprague-Dawley
Reg. No./Substance:
0/Phthalic Acids; 131-70-4/monobutyl phthalate; 84-74-2/Dibutyl Phthalate

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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