Journal Article

Zearalenone exposure affects epigenetic modifications of mouse eggs

Cheng-Cheng Zhu, Yan-Jun Hou, Jun Han, Xiang-Shun Cui, Nam-Hyung Kim and Shao-Chen Sun

in Mutagenesis

Published on behalf of United Kingdom Environmental Mutagen Society

Volume 29, issue 6, pages 489-495
Published in print November 2014 | ISSN: 0267-8357
Published online August 2014 | e-ISSN: 1464-3804 | DOI: https://dx.doi.org/10.1093/mutage/geu033
Zearalenone exposure affects epigenetic modifications of mouse eggs

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  • Clinical Cytogenetics and Molecular Genetics
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Zearalenone (ZEA) is a mycotoxin produced by various Fusarium fungi, which has been shown to cause several cases of mycotoxicosis in farm animals and humans. However, there is no evidence regarding the effect of ZEA on mouse egg developmental competence. In this study, we found that the activation rate of maturated oocytes was affected in mice by ZEA treatment, indicating that ZEA affects egg developmental competence. And we explored possible mechanisms of low mouse maturated oocyte developmental competence after ZEA treatment from an epigenetic modification perspective. The fluorescence intensity analysis showed that 5-methyl cytosine level increased after ZEA treatment, indicating that the general DNA methylation level increased in the treated eggs. Moreover, histone methylations were also altered: H3K4me2 as well as H3K9me3 and H4K20me1, me2, me3 levels decreased in eggs that were cultured in high-dose ZEA medium. Thus, our results indicated that ZEA decreased egg developmental competence by affecting the epigenetic modifications.

Journal Article.  4331 words.  Illustrated.

Subjects: Clinical Cytogenetics and Molecular Genetics ; Genetics and Genomics

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