alexa [Mouse sperm DNA damage induced by exogenous BDE-209].
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Molecular Biomarkers & Diagnosis

Author(s): Wang ZX, Duan HY, Wang L, Chen DJ

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Abstract OBJECTIVE: To assess the DNA damage in mouse sperms induced by exogenous BDE-209 and explore the possible mechanism of BDE-209 in affecting normal zygote development. METHODS: Mouse sperms were harvested from the epididymal tail and suspended in HTF medium for a 90-min exposure to BDE-209 at varied concentrations of 0, 2.5, 5.0, 10, and 20 µg/ml (groups A-E, respectively). After the exposure, the sperms were subjected to single-cell gel electrophoresis (SCGE) to assess the DNA damage. RESULTS: The tail length of the sperms averaged 1.15 ∓ 1.27 µm in group A. Exposure to 10 and 20 µg/ml BDE-209 resulted in a significant lengthening of the sperm tails (2.13 ∓ 1.29 µm and 2.83 ∓ 2.46 µm, respectively, P<0.01) as well as increased DNA content in the tail of the cells (P<0.01). The Olive tail moment in group A was 0.270 ∓ 0.322, and increased after BDE-209 exposure to 0.453 ∓ 0.375 and 808 ∓ 0.822 in groups D and E, respectively. The tail/head length ratio in groups C, D, and E (0.077 ∓ 0.093, 0.112 ∓ 0.068, and 0.191 ∓ 0.207) were significantly greater than that in group A (0.045 ∓ 0.049). The DNA damage of the mouse sperms was directly correlated to the concentrations of BDE-209, with correlation coefficients all above 0.9. CONCLUSIONS: Exogenous BDE-209 can cause mouse sperm DNA damage and lead to sperm DNA chain breakage, and this effect shows an obvious dose dependence.
This article was published in Nan Fang Yi Ke Da Xue Xue Bao and referenced in Journal of Molecular Biomarkers & Diagnosis

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