Mutant Frequency at the hprt Locus in Human T-Cell Exposed to Pentachlorophenol

Pentachlorophenol의 노출에 의한 사람 T-임파구의 hprt 유전자에서 돌연변이 빈도

  • 윤병수 (경기대학교 생물학과) ;
  • 조명행 (서울대학교 수의과대학) ;
  • 김인규 (한국원자력연구소 방사선생체해석분야) ;
  • 박선영 (한국원자력연구소 방사선생체해석분야) ;
  • 이영순 (서울대학교 수의과대학)
  • Published : 1997.06.01

Abstract

The mutational effects of pentachlorophenol (PCP) on the hypoxanthine phosphoribosyl transf erase (hprt) locus in human T-cell were analysed by T-cell clonal assay in vitro. Cells were exposed for 24 hours at primary culture to 0~100 ppm (W/V) PCP in dimethyl sulfoxide. Treated cells were allowed at the same time to stimulate by phytohemagglutinin (PHA) and T-cell growth factor (TCGF) and then seeded in medium containing 6-thioguanine to select for hprt-negative routants. We have also defined the optimal condition for the determination of mutant frequency. The parameters investigated include survival counting, first and second subculture for clonal efficiency plating and mutant plating. Under the optimal conditions, mutant frequencies of high dose-treated cells were significantly higher than those of non-treated or low dose cells. The results indicated a clear dose-effect relationship and showed that mutant frequency in 50 ppm PCP treated cell was 4.31$\times$$10^{-5}$ (background, 8.32$\times$$10^{-6}$). Above data strongly suggest that hprt mutation assay can be used as a biomarker for the environmental risk assessment.

Keywords

References

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