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High Content Screening Analysis to Evaluate the Toxicological Effects of Harmful and Potentially Harmful Constituents (HPHC)
Published on: May 10, 2016
A stable and sensitive testing system for potential carcinogens based on DNA damage-induced gene expression in human
Rong Zhang1, Yujie Niu, Hairong Du
1MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan 430030, Hubei, PR China.
Summary
A new reporter system using HepG2 cells effectively screens environmental pollutants for carcinogenic and genotoxic potential. This gadd153-luciferase assay accurately identifies known carcinogens and non-carcinogens, aiding in environmental safety assessments.
Area of Science:
- Environmental Toxicology
- Molecular Biology
- Cell Biology
Background:
- Assessing environmental pollutants for carcinogenic and genotoxic effects is crucial for public health.
- Existing screening methods can be time-consuming and require complex procedures.
Purpose of the Study:
- To establish and validate a novel in vitro screening method for potential carcinogens and genotoxic agents.
- To utilize a stably transfected HepG2 cell line with a gadd153 promoter driving a luciferase reporter gene.
Main Methods:
- Development of a reporter assay using HepG2 cells transfected with a gadd153 promoter-luciferase construct.
- Exposure of the cell line to 24 diverse agents, including known carcinogens, non-carcinogens, and environmental samples.
- Quantification of gadd153 promoter activation via luciferase activity measurement.
Main Results:
- All 20 tested known carcinogenic and genotoxic agents induced gadd153-Luc expression at sublethal doses.
- Four tested non-carcinogens did not induce gadd153-Luc expression.
- The assay demonstrated high accuracy in distinguishing between carcinogenic and non-carcinogenic agents.
Conclusions:
- The developed gadd153-Luc reporter system is a sensitive and reliable tool for in vitro screening of potential carcinogens.
- This assay can serve as a valuable complementary method to existing genotoxicity and mutagenicity tests.
- The system facilitates efficient assessment of environmental pollutants' hazardous potential.
