Toxicological Research

  • 제22권2호
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  • Pages.95-102
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  • 2006
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  • 1976-8257(pISSN)
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  • 2234-2753(eISSN)
한국독성학회 (Korean Society of Toxicology & Korea Environmental Mutagen Society)
권호 표지

Early Gene Expression in Mouse Spleen Cells after Exposure to Nickel Acetate

  • Koh Jae-Ki (Department of Biochemistry, College of Medicine, Soonchunhyang University) ;
  • Kim Woo-Hyoung (Department of Biochemistry, College of Medicine, Soonchunhyang University) ;
  • Lee Chang-Ho (Department of Urology, College of Medicine, Soonchunhyang University) ;
  • Nam Hae-Seon (Department of Clinical Parasitology, College of Medicine, Soonchunhyang University) ;
  • Kim Sung-Ho (Department of Chemistry, College of Natural Science, Soonchunhyang University) ;
  • Woo Kee-Min (Department of Biochemistry, College of Medicine, Soonchunhyang University) ;
  • Lee Sang-Han (Department of Biochemistry, College of Medicine, Soonchunhyang University)
  • 발행 : 2006.06.01
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초록

Exposure to soluble nickel compound produces toxic effects on immune system, but the mechanism of action remains to be elucidated. Differential gene expression was studied to understand the potential molecular mechanism responsible for acute toxicity induced by nickel acetate in spleen cells. We exposed mouse spleen cells to nickel acetate with a nontoxic dose ($40{\mu}M$) and then extracted total RNA at 6 h and 12 h after exposure. The RNA was hybridized onto 10K mouse oligonucleotide microarrays, and data were analyzed using GeneSpring 7.1. Nickel had a modest effects on expression of many genes, in the range of 1.3-3 fold. The expression profile showed time-dependent changes in expression levels of differentially expressed genes, including some important genes related to cell cycle, apoptosis and DNA repair. In hierarchical cluster analysis of duplicate experiments, 111 genes were screened out. Out of these, 44 genes showing time- dependent up-regulation (>1.5 fold) and 38 genes showing down-regulation (>1.5 fold) at all time points were chosen for further analysis. The change in the expression of three genes (GPX1, GADD45B and FAIM) after nickel treatment was validated using RT-PCR. As a rule, a number of genes appear to be coordinately regulated between cell survival and cell death from nickel toxicity. In conclusion, changes in the gene profile in the spleen after nickel treatment are complex and genes with diverse functions are modulated. These findings will be contributed to the understanding of the complicated biological effects of nickel.

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