Skip Navigation
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Your Environment. Your Health.

Publication Detail

Title: Carbon monoxide inhibits monooxygenation by the conceptus and embryotoxic effects of proteratogens in vitro.

Authors: Faustman-Watts, E M; Giachelli, C M; Juchau, M R

Published In Toxicol Appl Pharmacol, (1986 May)

Abstract: Evidence that Day 10 to 11 rat conceptuses can contain sufficient quantities of xenobiotic-oxidizing P-450(s) to catalyze the conversion of proteratogens to reactive teratogenic intermediates is presented. Quantities of reactive intermediates generated by conceptuses from 2-acetylaminofluorene (AAF) were sufficient to result in the appearance of gross morphologic abnormalities with a high incidence of neural tube anomalies. Carbon monoxide effectively inhibited the conversion of AAF to hydroxylated metabolites by rat conceptuses, and also inhibited the capacity of AAF to elicit neural tube anomalies in cultured embryos. Inhibition by CO of either parameter was observed only with conceptuses exposed in utero to the potent P-450 inducer, 3-methylcholanthrene.

PubMed ID: 3705078 Exiting the NIEHS site

MeSH Terms: 2-Acetylaminofluorene/metabolism; 2-Acetylaminofluorene/toxicity; Animals; Carbon Monoxide/pharmacology*; Chromatography, High Pressure Liquid; Cytochrome P-450 Enzyme System; Embryo, Mammalian/drug effects*; Embryo, Mammalian/metabolism; Female; In Vitro Techniques; Methylcholanthrene/pharmacology; Oxidation-Reduction/drug effects; Oxygenases/antagonists & inhibitors*; Pregnancy; Rats; Teratogens/antagonists & inhibitors*; Teratogens/metabolism

to Top