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Wild-type Blocking PCR Combined with Direct Sequencing as a Highly Sensitive Method for Detection of Low-Frequency Somatic Mutations
Published on: March 29, 2017
[The tk gene mutation analysis in WTK1 cell line by multiplex PCR]
Yi-jing Wang1, Pei-qiang Shuai, Li-shi Zhang
1Department of Nutrition and Food Hygiene, West China School of Public Health, Sichuan University, Chengdu 610041, China.
Objective:
To explore the tk gene mutation spectrum in spontaneous and induced WTK1 mutants.
Methods:
After exposure to methyl methanesulfonate (MMS), mitomycin (MMC) or sodiam azide (NaN3), spontaneously-arising and induced mutants of WTK1 cell line were selected. The spectrum and hotspot of tk gene mutation were analyzed by multiplex PCR.
Results:
Three chemicals used in this study induced tk mutation frequency (MF) to increase significantly in a dose-dependent manner; most of the analyzed mutants had lost exon 4 and exon 5-7.
Conclusion:
Three chemicals have mutagenic effect on WTK1 cell line, and obvious hotspot exists in tk gene mutation.
Insights
Methyl methanesulfonate (MMS), mitomycin (MMC), and sodium azide (NaN3) significantly increase tk gene mutation frequency in WTK1 cells. Analysis revealed hotspots and common exon deletions, indicating mutagenic effects.
Area of Science:
- Molecular biology
- Genetics
- Toxicology
Context:
- The WTK1 cell line is a valuable model for studying gene mutations.
- Understanding the mechanisms of chemical mutagenesis is crucial for risk assessment.
Purpose:
- To investigate the mutation spectrum of the tk gene in spontaneous and induced WTK1 mutants.
- To identify mutation hotspots within the tk gene.
Summary:
- Exposure to methyl methanesulfonate (MMS), mitomycin (MMC), and sodium azide (NaN3) resulted in a dose-dependent increase in tk gene mutation frequency in WTK1 cells.
- Multiplex PCR analysis of induced mutants showed a mutation spectrum predominantly involving the loss of exon 4 and exons 5-7.
- These findings confirm the mutagenic potential of the tested chemicals and highlight specific mutation hotspots in the tk gene.
Impact:
- Provides insights into the mutagenic mechanisms of MMS, MMC, and NaN3 at the tk gene locus.
- Contributes to the understanding of chemical-induced DNA damage and repair pathways.
- Informs risk assessment strategies for chemical mutagens.
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