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Equol: A Microbiota Metabolite Able to Alleviate the Negative Effects of Zearalenone during In Vitro Culture of Ovine Preantral Follicles

1
Laboratory of Manipulation of Oocytes and Ovarian Pre-Antral Follicles (LAMOFOPA), Faculty of Veterinary Medicine, State University of Ceará, Fortaleza 60714-903, CE, Brazil
2
Laboratory of Biotechnology and Molecular Biology (LBBM), State University of Ceará, Fortaleza 60714-903, CE, Brazil
3
Schothorst Feed Research, 8218 NA Lelystad, The Netherlands
*
Author to whom correspondence should be addressed.
Toxins 2019, 11(11), 652; https://doi.org/10.3390/toxins11110652 (registering DOI)
Received: 20 October 2019 / Revised: 3 November 2019 / Accepted: 5 November 2019 / Published: 9 November 2019
(This article belongs to the Section Mycotoxins)
The impact of zearalenone (ZEN) on female reproduction remains an issue, since its effects may differ among exposed cell types. Besides the use of decontaminants in animal diet, other approaches should be considered to minimise ZEN effects after exposure. Since the first organ in contact with ZEN is the gastrointestinal tract, we hypothesise that products of microbiota metabolism may play a role in ZEN detoxification. We aimed to evaluate the effect of 1 µmol/L ZEN and 1 µmol/L equol (a microbial metabolite), alone or in combination, on the survival and morphology of in vitro cultured ovarian preantral follicles. Ovaries from 12 sheep were collected at a local abattoir and fragmented, and the ovarian pieces were submitted to in vitro culture for three days in the presence or absence of the test compounds. The follicular morphology was impaired by ZEN, but equol could alleviate the observed degeneration rates. While ZEN decreased cell proliferation in primary and secondary follicles, as well as induced DNA double-strand breaks in primordial follicles, all these observations disappeared when equol was added to a culture medium containing ZEN. In the present culture conditions, equol was able to counteract the negative effects of ZEN on ovarian preantral follicles. View Full-Text
Keywords: xenoestrogens; mycotoxin; ovary; sheep; in vitro culture xenoestrogens; mycotoxin; ovary; sheep; in vitro culture
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Silva, T.E.S.; de Brito, D.C.C.; de Sá, N.A.R.; da Silva, R.F.; Ferreira, A.C.A.; da Silva, J.Y.G.; Guedes, M.I.F.; Rodrigues, A.P.R.; dos Santos, R.R.; de Figueiredo, J.R. Equol: A Microbiota Metabolite Able to Alleviate the Negative Effects of Zearalenone during In Vitro Culture of Ovine Preantral Follicles. Toxins 2019, 11, 652.

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