What question did this study set out to answer?

To assess whether 10 known and suspected spindle poisons induce aneuploidy and alter cell division kinetics in male mouse germ cells.

January 1, 1992Mutagenesis

Aneuploidy induction in mouse spermatocytes

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Authors

BMBeate M. MillerRoche (Switzerland)IAI.‐D. AdlerBoston Children's Hospital

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Implication

Experimental study reveals that spindle poisons induce hyperploidy and meiotic delay in mouse spermatocytes, suggesting cell cycle changes may serve as a rapid prescreen.

Key Points

To assess whether 10 known and suspected spindle poisons induce aneuploidy and alter cell division kinetics in male mouse germ cells.
Administered varying doses of 10 spindle poisons (colchicine, econazole, chloral hydrate, hydroquinone, diazepam, thiabendazole, cadmium chloride, pyrimethamine, thimerosal, vinblastine) to male (102/El x C3H/El)F1 mice.
Sampled testicular material at 6, 14, and 22 hours post-treatment to evaluate hyperploidy in secondary spermatocytes via metaphase chromosome counting.
Quantified the proportions of spermatogonial mitoses along with first and second meiotic metaphases to determine chemical effects on testicular cell proliferation.
Colchicine, econazole, chloral hydrate, hydroquinone, and vinblastine markedly increased the frequency of hyperploid secondary spermatocytes, demonstrating chromosome non-disjunction during the first meiotic division.
Diazepam and cadmium chloride were less potent but produced statistically significant aneuploidy induction (P < 0.05).
Seven agents (colchicine, econazole, chloral hydrate, hydroquinone, diazepam, cadmium chloride, vinblastine) concomitantly induced meiotic delay in primary and/or secondary spermatocytes.

Cite This Study

Miller et al. (1992) studied this question.

synapsesocial.com/papers/6a74620101b447f0dadbd137 https://doi.org/10.1093/mutage/7.1.69

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Implication

Experimental study reveals that spindle poisons induce hyperploidy and meiotic delay in mouse spermatocytes, suggesting cell cycle changes may serve as a rapid prescreen.

Aneuploidy induction in mouse spermatocytes

Discussion

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Implication

Key Points

Cite This Study

Aneuploidy induction in mouse spermatocytes

Discussion

Member takes

Implication

Key Points

Cite This Study

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