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The epigenetic processes of meiosis in male mice are broadly affected by the widely used herbicide atrazine
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The epigenetic processes of meiosis in male mice are broadly affected by the widely used herbicide atrazine
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Journal Article
The epigenetic processes of meiosis in male mice are broadly affected by the widely used herbicide atrazine
2015
Overview
Background
Environmental factors such as pesticides can cause phenotypic changes in various organisms, including mammals. We studied the effects of the widely used herbicide atrazine (ATZ) on meiosis, a key step of gametogenesis, in male mice.
Methods
Gene expression pattern was analysed by Gene–Chip array. Genome-wide mapping of H3K4me3 marks distribution was done by ChIP-sequencing of testis tissue using Illumina technologies. RT-qPCR was used to validate differentially expressed genes or differential peaks.
Results
We demonstrate that exposure to ATZ reduces testosterone levels and the number of spermatozoa in the epididymis and delays meiosis. Using Gene-Chip and ChIP-Seq analysis of H3K4me3 marks, we found that a broad range of cellular functions, including GTPase activity, mitochondrial function and steroid-hormone metabolism, are affected by ATZ. Furthermore, treated mice display enriched histone H3K4me3 marks in regions of strong recombination (double-strand break sites), within very large genes and reduced marks in the pseudoautosomal region of X chromosome.
Conclusions
Our data demonstrate that atrazine exposure interferes with normal meiosis, which affects spermatozoa production.
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V
Subject
/ Animal Genetics and Genomics
/ Animals
/ Atrazine
/ Biomedical and Life Sciences
/ Chromatin Immunoprecipitation
/ Comparative and evolutionary genomics
/ Computational Biology - methods
/ DNA Breaks, Double-Stranded - drug effects
/ Epigenesis, Genetic - drug effects
/ Genome-Wide Association Study
/ Genomics
/ Gonadal Steroid Hormones - metabolism
/ GTP Phosphohydrolases - metabolism
/ High-Throughput Nucleotide Sequencing
/ Male
/ Mice
/ Microbial Genetics and Genomics
/ Position-Specific Scoring Matrices
