Archives of Pharmacal Research

The Pharmaceutical Society of Korea (대한약학회)
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Expression Profiling of Lipopolysaccharide Target Genes in RAW264.7 Cells by Oligonucleotide Microarray Analyses

  • Huang, Hao (Department of Cell and Developmental Biology, BK21 Program, Dental Research Institute, Seoul National University School of Dentistry) ;
  • Park, Cheol-Kyu (Department of Cell and Developmental Biology, BK21 Program, Dental Research Institute, Seoul National University School of Dentistry) ;
  • Ryu, Ji-Yoon (Department of Cell and Developmental Biology, BK21 Program, Dental Research Institute, Seoul National University School of Dentistry) ;
  • Chang, Eun-Ju (Department of Cell and Developmental Biology, BK21 Program, Dental Research Institute, Seoul National University School of Dentistry) ;
  • Lee, Young-Kyun (Department of Cell and Developmental Biology, BK21 Program, Dental Research Institute, Seoul National University School of Dentistry) ;
  • Kang, Sam-Sik (Natural Products Research Institute, College of Pharmacy, Seoul National University) ;
  • Kim, Hong-Hee (Department of Cell and Developmental Biology, BK21 Program, Dental Research Institute, Seoul National University School of Dentistry)
  • Published : 2006.10.01
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Abstract

In inflammatory responses, induction of cytokines and other immune regulator genes in macrophages by pathogen-associated signal such as lipopolysaccharide (LPS) plays a crucial role. In this study, the gene expression profile changes by LPS treatment in the macrophage/monocyte lineage cell line RAW264.7 was investigated. A 60-mer oligonucleotide microarray of which probes target 32381 mouse genes was used. A reverse transcription-in vitro translation labeling protocol and a chemileuminescence detection system were employed. The mRNA expression levels in RAW264.7 cells treated for 6 h with LPS and the control vehicle were compared. 747 genes were up-regulated and 523 genes were down-regulated by more than 2 folds. 320 genes showing more than 4-fold change by LPS treatment were further classified for the biological process, molecular function, and signaling pathway. The biological process categories that showed high number of increased genes include the immunity and defense, the nucleic acid metabolism, the protein metabolism and modification, and the signal transduction process. The chemokine-cytokine signaling, interleukin signaling, Toll receptor signaling, and apoptosis signaling pathways involved high number of genes differentially expressed in response to LPS. These expression profile data provide more comprehensive information on LPS-target genes in RAW264.7 cells, which will be useful in comparing gene expression changes induced by extracts and compounds from anti-inflammatory medicinal herbs.

Keywords

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