Journal of Acupuncture Research

  • 제34권1호
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  • Pages.23-30
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  • 2017
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  • 2586-288X(pISSN)
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  • 2586-2898(eISSN)
대한침구의학회 (Korean Acupuncture & Moxibustion Medicine Society)
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Analysis of the Apoptotic Mechanisms of Snake Venom Toxin on Inflammation-induced HaCaT Cell-line

  • Chun, Youl Woong (Department of Acupuncture & Moxibustion Medicine, College of Oriental Medicine, Gachon University) ;
  • Song, Ho Sueb (Department of Acupuncture & Moxibustion Medicine, College of Oriental Medicine, Gachon University)
  • 투고 : 2017.01.12
  • 심사 : 2017.02.08
  • 발행 : 2017.02.20
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초록

Objectives : In this study, the roles of Interleukin (IL)-4 and Signal transducer and activator of transcription 6 (STAT6), which have been reported to play a role in the pathogenesis of inflammation and cancer, were evaluated in snake venom toxin (SVT)-induced apoptosis. Methods : Inflammation was induced in human HaCaT kerationocytes, by lipopolysaccharide (LPS; $1{\mu}g/mL$) or tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$), followed by treatment with SVT (0, 1, or $2{\mu}g/mL$). Cell viability was assessed by MTT assays after 24 h, and the expression of levels of IL-4, STAT6, and the apoptosis-related proteins p53, Bax, and Bcl-2 were evaluated by western blotting. Electro mobility shift assays (EMSAs) were performed to evaluate the DNA binding capacity of STAT6. Results : MTT assays showed that inflammation-induced growth of HaCaT cells following LPS or TNF-${\alpha}$ stimulation was inhibited by SVT. Western blot analysis showed that p53 and Bax, which promote apoptosis, were increased, whereas that of Bcl-2, an anti-apoptotic protein, was decreased in a concentration-dependent manner in LPS- or TNF-${\alpha}$-induced HaCaT cells following treatment with SVT. Moreover, following treatment of HaCaT cells with LPS, IL-4 concentrations were increased, and treatment with SVT further increased IL-4 expression in a concentration-dependent manner. Western blotting and EMSAs showed that the phosphorylated form of STAT6 was increased in HaCaT cells in the context of LPS- or TNF-${\alpha}$-induced inflammation in a concentration-dependent manner, concomitant with an increase in the DNA binding activity of STAT6. Conclusion : SVT can effectively promote apoptosis in HaCaT cells in the presence of inflammation through a pathway involving IL-4 and STAT6.

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참고문헌

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