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Measuring DNA Damage and Repair in Mouse Splenocytes After Chronic In Vivo Exposure to Very Low Doses of Beta- and Gamma-Radiation
Published on: July 3, 2015
[Studies on DNA damage and repair induced by acrylamide in cells from mouse various organs]
Honglian Ma1, Wenjuan Wang, Yuanyuan Yang
1Department of Cytology and Genetics, Shanxi Medical University, Taiyuan 030001, China.
Objective:
To investigate the genotoxicity of acrylamide and to determine its genotoxic target organs.
Methods:
DNA damage was detected by using comet assay. Lung, liver, spleen, kidney, testicle, bone marrow and peripheral lymphocytes of mice were isolated at 0, 3, 6, 12 and 24h after 50 mg/kg acrylamide intraperitoneal injection.
Results:
Significant increase in comet tail length, tail DNA% and tail moment in the cells of liver, spleen, testicle, bone marrow and peripheral lymphocytes were induced at different sampling time after treatment of acrylamide. The indexes decreased more or less as time extended. No obvious increase in DNA damages was observed in the lung and kidney with the same treatment.
Conclusion:
Acrylamide could cause DNA damage to multiple organs of mice. The DNA damage caused by acrylamide could be repaired to a certain degree.
Insights
Acrylamide causes DNA damage in mouse liver, spleen, testicles, bone marrow, and lymphocytes. This genotoxicity indicates potential health risks, though some DNA repair occurs.
Area of Science:
- Toxicology
- Genetics
Context:
- Acrylamide is a common industrial chemical and food contaminant.
- Understanding its genotoxic effects is crucial for risk assessment.
Purpose:
- To investigate the genotoxicity of acrylamide.
- To identify specific organs targeted by acrylamide-induced DNA damage.
Summary:
- Mice received acrylamide (50 mg/kg) via intraperitoneal injection.
- The comet assay detected significant DNA damage in liver, spleen, testicles, bone marrow, and peripheral lymphocytes.
- Lung and kidney tissues showed no significant DNA damage.
- DNA damage markers generally decreased over time, suggesting partial repair.
Impact:
- Acrylamide is confirmed as a genotoxic agent affecting multiple organs in mice.
- Findings highlight the need for monitoring acrylamide exposure and its potential health consequences.
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