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Aniline is rapidly converted into paracetamol impairing male reproductive development

Abstract : Industrial use of aniline is increasing worldwide with production estimated to surpass 5.6 million metric tons in 2016. Exposure to aniline occurs via air, diet and water augmenting the risk of exposing a large number of individuals. Early observations suggest that aniline is metabolised to paracetamol/acetaminophen, likely explaining the omnipresence of low concentrations of paracetamol in European populations. This is of concern as recent studies implicate paracetamol as a disrupter of reproduction. Here we show through steroidogenic profiling that exposure to aniline led to increased levels of the Δ4 steroids, suggesting that the activity of CYP21 was decreased. By contrast, paracetamol decreased levels of androgens likely through inhibition of CYP17A1 activity. We confirm that aniline in vivo is rapidly converted to paracetamol by the liver. Intrauterine exposure to aniline and paracetamol in environmental and pharmaceutical relevant doses resulted in shortening of the anogenital distance in mice, a sensitive marker of fetal androgen levels that in humans is associated with reproductive malformations and later life reproductive disorders. In conclusion, our results provide evidence for a scenario where aniline, through its conversion into anti-androgenic paracetamol, impairs male reproductive development
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Contributor : Laurent Jonchère <>
Submitted on : Wednesday, August 26, 2015 - 3:11:52 PM
Last modification on : Thursday, January 14, 2021 - 11:22:11 AM

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Jacob Bak Holm, Clémentine Chalmey, Hendrik Modick, Lars Skovgaard Jensen, Georg Dierkes, et al.. Aniline is rapidly converted into paracetamol impairing male reproductive development. Toxicological Sciences, Oxford University Press (OUP), 2015, 148 (1), pp.288-298. ⟨10.1093/toxsci/kfv179⟩. ⟨hal-01187305⟩



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