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Published on: January 16, 2015
Mutagenicity and genotoxicity of dicapthon insecticide
1Faculty of Arts and Sciences, Molecular Biology and Genetics Department, Usak University, 1 Eylül Campus, 64300, Uşak, Turkey, rliman@hotmail.com.
Abstract:
Mutagenic and genotoxic effects of dicapthon were investigated by using the bacterial reverse mutation assay in Salmonella typhimurium TA97, TA98, TA100 and TA102 strains with or without metabolic activation system (S9 mix), and chromosome aberrations (CAs), sister chromatid exchanges (SCEs), and micronucleus (MN) tests in human peripheral blood lymphocytes in vitro. Dicapthon was dissolved in dimethyl sulfoxide for all test systems. 0.1, 1, 10 and 100 μg/plate doses of dicapthon were found to be weakly mutagenic on S. typhimurium TA 98 without S9 mix. The human peripheral lymphocytes were treated with four experimental concentrations of dicapthon (25, 50, 100, and 200 μg/mL) for 24 and 48 h. Dicapthon increased the frequency of SCE only at the 100 μg/mL concentration for the 24 and 48 h applications. Dicapthon also induced abnormal cell frequency, CA/cell ratio and frequency of MN dose dependently for 24 and 48 h. Dicapthon showed a statistically significant cytotoxic effect by decreasing the mitotic index in all concentrations and a cytostatic effect by decreasing nuclear division index in 100 and 200 μg/mL concentrations for both treatment periods when compared with both untreated and solvent controls. These values decreased also in a dose dependent manner.
Insights
Dicapthon exhibits weak mutagenicity in bacterial assays and induces genotoxic effects, including chromosome aberrations and micronuclei, in human cells. It also demonstrates cytotoxic and cytostatic properties in a dose-dependent manner.
Area of Science:
- Toxicology
- Genetics
- Cell Biology
Background:
- Dicapthon is an organophosphate insecticide.
- Pesticides can pose risks to human health through mutagenic and genotoxic effects.
- Assessing the safety of dicapthon is crucial for understanding its environmental and health impacts.
Purpose of the Study:
- To investigate the mutagenic potential of dicapthon using bacterial reverse mutation assays.
- To evaluate the genotoxic effects of dicapthon on human peripheral blood lymphocytes in vitro.
- To determine the cytotoxic and cytostatic effects of dicapthon on human cells.
Main Methods:
- Bacterial reverse mutation assay in Salmonella typhimurium strains (TA97, TA98, TA100, TA102) with and without metabolic activation (S9 mix).
- In vitro tests on human peripheral blood lymphocytes, including chromosome aberrations (CAs), sister chromatid exchanges (SCEs), and micronucleus (MN) tests.
- Cytotoxicity and cytostatic effects assessed by monitoring mitotic index and nuclear division index.
Main Results:
- Dicapthon showed weak mutagenicity in Salmonella typhimurium TA98 without S9 mix at doses of 0.1-100 μg/plate.
- Increased frequency of SCE, CAs, and MN in human lymphocytes was observed dose-dependently.
- Dicapthon exhibited significant cytotoxic and cytostatic effects, reducing mitotic and nuclear division indices.
Conclusions:
- Dicapthon possesses mutagenic and genotoxic properties.
- The compound induces chromosomal damage and affects cell proliferation in human lymphocytes.
- These findings highlight potential health risks associated with dicapthon exposure.
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