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Assessment of Biomarkers in Acetaminophen-Induced Hepatic Toxicity by siRNA

  • Kang, Jin-Seok (Department of Biomedical Laboratory Science, Namseoul University) ;
  • Yum, Young-Na (National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration) ;
  • Kim, Joo-Hwan (National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration) ;
  • Park, Sue-Nie (National Institute of Food and Drug Safety Evaluation, Korea Food and Drug Administration)
  • Published : 2009.10.31

Abstract

We investigated global gene expression from both mouse liver and mouse hepatic cell lines treated with acetaminophen (APAP) in order to compare in vivo and in vitro profiles and to assess the feasibility of the two systems. During our analyses of gene expression profiles, we picked up several down-regulated genes, such as the cytochrome P450 family 51 (Cyp51), sulfotransferase family cytosolic 1C member 2 (Sult1c2), 3-hydroxy-3-methylglutaryl-Coenzyme A synthase 1 (Hmgcs1), and several genes that were up-regulated by APAP, such as growth arrest and DNA-damage-inducible 45 alpha (Gadd45a), transformation related protein 53 inducible nuclear protein 1 (Trp53inp1) and zinc finger protein 688 (Zfp688). For validation of gene function, synthesized short interfering RNAs (siRNAs) for these genes were transfected in a mouse hepatic cell line, BNL CL.2, for investigation of cell viability and mRNA expression level. We found that siRNA transfection of these genes induced down-regulation of respective mRNA expression and decreased cell viability. siRNA transfection for Cyp51 and others induced morphological alterations, such as membrane thickening and nuclear condensation. Taken together, siRNA transfection of these six genes decreased cell viability and induced alteration in cellular morphology, along with effective inhibition of respective mRNA, suggesting that these genes could be associated with APAP-induced toxicity. Furthermore, these genes may be used in the investigation of hepatotoxicity, for better understanding of its mechanism.

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