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Antiviral activity of methanol extract from Rhus chinensis gall

오배자 추출물의 항바이러스 활성

  • Lee, Doseung (Jeju Biodiversity Research Institute (JBRI)) ;
  • Min, TaeSun (Faculty of Biotechnology, College of Applied Life Science (SARI), Jeju National University) ;
  • Lee, Dong-Sun (Faculty of Biotechnology, College of Applied Life Science (SARI), Jeju National University)
  • Received : 2018.10.19
  • Accepted : 2018.11.07
  • Published : 2018.12.31

Abstract

Trafficking process of viral glycoprotein to cell surface results in the syncytium formation when baby hamster kidney (BHK) cells was infected by Newcastle disease virus (NDV). Rhus chinensis gall, well-known as a medicinal plant, inhibited not only syncytium formation, but also trafficking of glycoprotein, hemagglutinin-neuramidase (HN) to the cell-surface. Modification of viral glycoprotein is processed within the endoplasmic reticulum and golgi body during trafficking into surface. R. chinensis gall extracts showed the strong inhibitory activities ($IC_{50}$ $12.5{\mu}g/mL$) against ${\alpha}-glucosidase$, when compared with the ${\beta}-glucosidase$. And this inhibitory activities is increased by the samples in a dose-depedent pattern. These data showed that the extracts of R. chinensis gall inhibited the cell-surface expression of NDV-hemagglutinin-neuramidase glycoprotein without significantly affecting HN glycoprotein synthesis in NDV-infected BHK cells.

Newcastle disease virus (NDV) 감염된 baby hamster kidney 세포에서 Syncytium (합포체) 형성은 세포막 표면으로의 수송된 바이러스 당단백질 hemagglutinin-neuramidase에 의해 일어난다. HAU 값은 추출물의 농도가 25과 $3.2{\mu}g/mL$ 사이에서는 현저하게 감소하였으나, $25{\mu}g/mL$ 농도에서는 NDV 감염된 HAD (%)는 광범위한 흡착능의 감소를 나타났으나 바이러스 당단백질의 세포내 생합성은 저해되지 않았다. 그러므로 오배자 추출물은 바이러스 당단백질의 세포막으로의 수송과 함께 합포체 형성을 저해하여 항바이러스 활성을 갖는 것으로 결론된다. 또한 오배자 추출물의 저해활성을 조사한 결과 ${\alpha}-glucosidase$에 대한 추출물의 $IC_{50}$$12.5{\mu}g/mL$이었으며, ${\beta}-glucosidase$, ${\alpha}-glucosidase$, ${\beta}-mannosidase$에 대한 오배자 추출물의 $IC_{50}$은 각각 26, 36, $50{\mu}g/mL$로 나타나 ${\beta}-type$ glycosidases 보다 ${\alpha}-type$ glycosidase에 대한 효소활성 저해능이 우수하였다. 따라서 $IC_{50}$ 농도에서는 세포내에서 당단백질 생합성은 저해되지 않으며 당단백질의 수송을 저해하는 것으로 판단되었으며 향후 항바이러스 관련 작용기작의 연구가 필요하다고 사료된다.

Keywords

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