Oxidative DNA damage induced by ethanol in mouse peripheral leucocytes
Lei Guo1, Jing Yu Yang, Chun Fu Wu
1Department of Pharmacology, Shenyang Pharmaceutical University, Shenyang, China.
Basic & Clinical Pharmacology & Toxicology
|August 8, 2008
Summary
Ethanol consumption causes DNA damage in mouse white blood cells through oxidative stress. This damage can be repaired after stopping ethanol intake, and the body may increase antioxidant defenses.
Area of Science:
- Biochemistry
- Genetics
- Toxicology
Background:
- Ethanol intake is linked to reactive oxygen species (ROS) production.
- Oxidative stress from ROS may cause DNA damage.
Purpose of the Study:
- Investigate ethanol's genotoxicity in mouse peripheral leucocytes.
- Assess DNA damage, oxidative stress markers, and antioxidant capacity following ethanol administration.
Main Methods:
- Single cell gel electrophoresis (comet assay) for DNA damage.
- Measurement of urinary 8-hydroxy-2'-deoxyguanosine (8-OHdG).
- Analysis of total antioxidant capacity (TAC) and ROS in whole blood.
Main Results:
- Acute and long-term ethanol administration induced significant DNA damage in leucocytes.
- Increased urinary 8-OHdG and blood ROS confirmed ethanol-induced oxidative DNA damage.
- Long-term ethanol treatment led to increased blood TAC, suggesting enhanced antioxidant defense.
Conclusions:
- Ethanol induces DNA damage in peripheral leucocytes, likely via oxidative stress.
- The observed DNA damage is repairable upon ethanol withdrawal.
- The body's antioxidant defense system may upregulate in response to chronic ethanol exposure.
