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Mutagenicity tests of 4-phenyl-1,3-dithia-2-thioxo-cyclopent-4-ene
S Sadanobu1, M L Holmstrom, C G Riach
1Department of Hygienic Chemistry, College of Pharmacy, Nihon University, Chiba, Japan.
Abstract:
The mutagenicity of 4-phenyl-1,3-dithia-2-thioxo-cyclopent-4-ene (DT827B) was examined in reverse mutation tests using Salmonella typhimurium and Escherichia coli, in the chromosomal aberration test with Chinese hamster ovary (CHO) cells, and in the micronucleus test using mice bone-marrow. In reverse mutation assay on DT827B according to Ames' method, DT827B was not mutagenic to S. typhimurium or E. coli when tested in dimethylsulfoxide to the limit of its solubility where precipitation occurred. In chromosomal aberration assay using CHO cells, DT827B was not clastogenic to induce structural chromosomal aberration but capable of inducing polyploidy. In micronucleus test, DT827B did not show micronucleus-inducing potential at the maximum dose. In conclusion of the three mutagenicity studies, DT827B was considered to cause no mutagenicity under the conditions used in the present experiments except the increase in polyploidy, which probably is due to a toxic effect of the compound.
Insights
This study investigated the mutagenicity of 4-phenyl-1,3-dithia-2-thioxo-cyclopent-4-ene (DT827B). DT827B showed no mutagenic potential in bacterial reverse mutation assays or mouse micronucleus tests, but induced polyploidy in CHO cells, likely due to toxicity.
Area of Science:
- Toxicology
- Genetics
- Chemical Safety
Background:
- Assessing the genotoxic potential of novel chemical compounds is crucial for risk assessment.
- 4-phenyl-1,3-dithia-2-thioxo-cyclopent-4-ene (DT827B) is a compound requiring evaluation for mutagenic and clastogenic effects.
Purpose of the Study:
- To evaluate the mutagenicity and genotoxicity of DT827B using a battery of standard in vitro and in vivo assays.
- To determine if DT827B induces gene mutations, chromosomal aberrations, or micronuclei formation.
Main Methods:
- Bacterial reverse mutation assay (Ames test) using Salmonella typhimurium and Escherichia coli.
- In vitro chromosomal aberration test using Chinese hamster ovary (CHO) cells.
- In vivo micronucleus test using mouse bone marrow cells.
Main Results:
- DT827B was not mutagenic to S. typhimurium or E. coli up to its solubility limit.
- DT827B did not induce structural chromosomal aberrations in CHO cells but did induce polyploidy.
- DT827B did not induce micronuclei formation in mouse bone marrow cells at the maximum dose.
Conclusions:
- DT827B is considered non-mutagenic in bacterial systems and non-clastogenic in mammalian cells under the tested conditions.
- The observed polyploidy induction in CHO cells is likely a consequence of DT827B's cytotoxic effects rather than direct genotoxicity.
- Further investigation into the toxicological profile of DT827B may be warranted.