IMMUNE NETWORK

  • 제11권3호
  • /
  • Pages.155-162
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  • 2011
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  • 1598-2629(pISSN)
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  • 2092-6685(eISSN)
대한면역학회 (The Korean Association of Immunobiologists)
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Ribosomal Protein L19 and L22 Modulate TLR3 Signaling

  • Yang, Eun-Jeong (Department of Microbiology, Instititute for Immunology and Immunological Diseases, and Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine) ;
  • Seo, Jin-Won (Department of Microbiology, Instititute for Immunology and Immunological Diseases, and Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine) ;
  • Choi, In-Hong (Department of Microbiology, Instititute for Immunology and Immunological Diseases, and Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine)
  • 투고 : 2011.05.18
  • 심사 : 2011.06.09
  • 발행 : 2011.06.30
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초록

Background: Toll-like receptor 3 (TLR3) recognizes double-stranded RNA (dsRNA) and induces inflammation. In this study we attempted to ascertain if there are endogenous host molecules controlling the production of cytokines and chemokines. Two candidates, ribosomal protein L19 and L22, were analyzed to determine if they influence cytokine production followed by TLR3 activation. In this study we report that L19 acts upon production of IP-10 or IL-8 differently in glioblastoma cells. Methods: L19 or L22 was transfected into HEK293-TLR3, A549 or A172 cells. After treatment with several inhibitors of NF-${\kappa}B$, PI3K, p38 or ERK, production of IL-8 or IP-10 was measured by ELISA. siRNA was introduced to suppress expression of L19. After Vesicular stomatitis virus infection, viral multiplication was measured by western blot. Results: L19 increased ERK activation to produce IL-8. In A172 cells, in which TLR3 is expressed at endosomes, L19 inhibited interferon regulatory factor 3 (IRF3) activation and IP-10 production to facilitate viral multiplication, whereas L19 inhibited viral multiplication in A549 cells bearing TLR3 on their cell membrane. Conclusion: Our results suggest that L19 regulates TLR3 signaling, which is cell type specific and may be involved in pathogenesis of autoimmune diseases and chronic inflammatory diseases.

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참고문헌

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