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An Automated Method to Perform The In Vitro Micronucleus Assay using Multispectral Imaging Flow Cytometry
Published on: May 13, 2019
Malathion and fenvalerate induce micronuclei in mouse bone marrow cells
1Environmental Toxicology Laboratory, Department of Life Science & Bioinformatics, Assam University, Silchar, India.
Environmental and Molecular Mutagenesis
|May 4, 2011
Summary
Malathion exposure in mice caused significant genotoxicity and cytotoxicity, indicated by increased micronuclei in bone marrow cells. Fenvalerate also showed genotoxic potential at higher doses, but further research is needed.
Area of Science:
- Environmental toxicology
- Genetics and heredity
- Public health
Background:
- Pesticide exposure poses significant public health risks.
- Understanding the genotoxic effects of commonly used pesticides is crucial.
Purpose of the Study:
- To investigate the in vivo genotoxic effects of malathion and fenvalerate in mice.
- To assess the dose-dependent responses and cytotoxicity associated with these pesticides.
Main Methods:
- Mice were exposed to varying doses of malathion (2.5, 5, 10 mg/kg) and fenvalerate (10, 20 mg/kg) via intraperitoneal or oral routes.
- The induction of micronuclei in bone marrow cells (micronucleated polychromatic erythrocytes) was quantified.
- Cytotoxicity was evaluated at the highest tested doses.
Main Results:
- Malathion exposure via both routes significantly increased micronucleated polychromatic erythrocytes in a dose-dependent manner.
- Malathion at 10 mg/kg induced significant cytotoxicity.
- Fenvalerate increased micronucleated polychromatic erythrocytes at higher doses (10 and 20 mg/kg) via intraperitoneal injection, without significant cytotoxicity or a clear dose-response correlation.
Conclusions:
- Technical grade malathion is confirmed as a genotoxic agent.
- Technical grade fenvalerate demonstrates potential genotoxicity, warranting further investigation for confirmation.
