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Heritable translocation and dominant-lethal mutation induction with ethylene oxide in mice
Mutation Research
|November 1, 1980
Summary
Ethylene oxide exposure in male mice induced dominant-lethal mutations and heritable translocations. Results indicate ethylene oxide
Area of Science:
- Toxicology
- Genetics
- Reproductive Toxicology
Background:
- Ethylene oxide is a widely used industrial chemical.
- Assessing its genotoxic potential is crucial for human health risk assessment.
Purpose of the Study:
- To evaluate the mutagenic and genotoxic effects of ethylene oxide in male mice.
- To determine if ethylene oxide induces dominant-lethal mutations and heritable translocations.
Main Methods:
- Male mice were exposed to ethylene oxide via intraperitoneal injection.
- Dominant-lethal mutations were assessed after a single high dose (150 mg/kg).
- Heritable translocations were evaluated after repeated lower doses (60 or 30 mg/kg/day for 5 weeks).
Main Results:
- Ethylene oxide significantly induced dominant-lethal mutations.
- Increased frequencies of heritable translocations were observed at both tested doses.
- The repair capacity of female mouse eggs for ethylene oxide-induced DNA damage showed minimal variation across stocks.
Conclusions:
- Ethylene oxide is a potent inducer of germ cell mutations in male mice.
- The observed translocation frequencies align with dose-square kinetics.
- These findings highlight the genotoxic risks associated with ethylene oxide exposure.
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