Mutagenesis, Vol. 14, No. 2, 173-179,
March 1999
© 1999 UK Environmental Mutagen Society/Oxford University Press
Detection of aneuploidy by multicolor FISH in mouse sperm after in vivo treatment with acrylamide, colchicine, diazepam or thiabendazole
1 Institut für Säugetiergenetik, GSF-Forschungszentrum für Umwelt und Gesundheit GmbH, Neuherberg, Ingolstädter Landstraße 1, 85764 Neuherberg, Germany and 2 Yunnan Normal University, Kumming, Peoples Republic of China
Multicolor fluorescence in situ hybridization (FISH) was used to investigate the induction of aneuploidy during meiosis in young adult male mice treated with chemicals chosen for the EU sponsored aneuploidy project (acrylamide, colchicine, diazepam and thiabendazole). The aim of the present study was to evaluate the frequency of aneuploid sperm induced by each of these chemicals by sperm FISH. Male (102/ElxC3H/El)F1 mice were treated with acrylamide (120 and 60 mg/kg single dose i.p.), colchicine (1.5 and 3 mg/kg single dose, i.p.), diazepam (300, 150 and 75 mg/kg single dose by oral intubation) or thiabendazole (100 and 300 mg/kg daily for 11 days by oral intubation). At 22 days after the last treatment, sperm were collected from the cauda epididymis. Three chromosome FISH was applied to determine hyperhaploid and diploid sperm with DNA probes specific for the chromosomes X, Y and 8. Five animals were treated per dose group and sperm aneuploidy was evaluated in 10 000 sperm per animal. We found significant increases in the frequency of total hyperhaploidy for the males treated with 3.0 mg/kg colchicine (0.092 versus 0.056%, P < 0.05) and with 1.5 mg/kg colchicine (0.082 versus 0.050%, P < 0.05), as well for the males treated with 300 mg/kg diazepam (0.081 versus 0.050%, P < 0.05), indicating that colchicine and diazepam each induced germ cell aneuploidy. We also found significant increases in the frequency of total diploidy for the males treated with 300 mg/kg diazepam (P < 0.05) and with 300 mg/kg thiabendazole (P < 0.05). No significant effects were found for 120 and 60 mg/kg acrylamide or for the other doses of diazepam and thiabendazole. These first results indicate that the multicolor FISH method is useful to determine aneuploidy induction in sperm of mice.
3 To whom correspondence should be addressed. Tel: +49 89 3187 2302; Fax: +49 89 3187 2210; Email: adler{at}gsf.de
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