Molecular & Cellular Toxicology

The Korean Society of Toxicogenomics and Toxicoproteomics (대한독성유전 단백체학회)
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Measurement of DNA Damage with Fpg/Endo III FLARE Assay and Real Time RT-PCR in SD Rats Exposed to Cumene

  • Kim, Soo-Jin (Laboratory of Occupational Toxicology, Chemical Safety & Health Research Center, Occupational Safety & Health Research Institute, KOSHA) ;
  • Rim, Kyung-Taek (Laboratory of Occupational Toxicology, Chemical Safety & Health Research Center, Occupational Safety & Health Research Institute, KOSHA) ;
  • Lee, Seong-Bae (Laboratory of Occupational Toxicology, Chemical Safety & Health Research Center, Occupational Safety & Health Research Institute, KOSHA) ;
  • Kim, Hyeon-Yeong (Laboratory of Occupational Toxicology, Chemical Safety & Health Research Center, Occupational Safety & Health Research Institute, KOSHA)
  • Published : 2008.09.30
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Abstract

To clarify the DNA damage from reactive oxygen species, we measured the DNA damage through Fpg/Endo III FLARE (Fragment Length Analysis with Repair Enzyme) assay and real time RT-PCR. The 80 SD rats assigned to 4 dose groups exposed to cumene vapor for 90 days. With Fpg/Endo III FLARE assay in hepatocytes, we found the OTM (Olive Tail Moment) and TL (Tail Length) significantly increased in no-enzyme treated and Fpg-treated control and 8 ppm groups with 28 days exposure. In Endo III-treated 8 ppm group, significantly increased the values with 90 days exposure. With lymphocytes, it was founded the values significantly increased in no-enzyme treated 800 ppm group in 28 and 90 days. It was significantly increased in Endo III-treated 80 ppm for 28 days and 800 ppm for 90 days. From the above findings, FLARE assay was suggested as being available as a biological marker for DNA damage induced by cumene exposure in SD rats. And we used real time RT-PCR for the OGG1 mRNA expression, it had dose-dependent biologic effects in 1 day exposure, but decrease the levels of rOGG1 mRNA. Our findings provide evidence that cumene exposure may cause suppression of rOGG1 in the rat hepatocytes or lymphocytes.

Keywords

References

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