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Effect of Hot Water Extracts of Roasted Rhus vemiciflua Stokes on Antioxidant Activity and Cytotoxicity

볶음 처리한 옻나무 열수추출물의 항산화성 및 암세포 성장억제효과

  • Kwak, Eun-Jung (Food Function Research Division, Korea Food Research Institute) ;
  • Jo, Il-Jin (Food Function Research Division, Korea Food Research Institute) ;
  • Sung, Ki-Seung (Food Function Research Division, Korea Food Research Institute) ;
  • Ha, Tae-Youl (Food Function Research Division, Korea Food Research Institute)
  • 곽은정 (한국식품연구원 식품기능연구본부) ;
  • 조일진 (한국식품연구원 식품기능연구본부) ;
  • 성기승 (한국식품연구원 식품기능연구본부) ;
  • 하태열 (한국식품연구원 식품기능연구본부)
  • Published : 2005.07.01

Abstract

The inhibitory effects of hot water extracts of Rhus verniciflua Stokes pith and peel roasted at 170, 200 and $220^{\circ}C$ on lipid peroxidation, formation of DPPH free radicals and growth of four human cancer cells such as HepG2 (liver cancer), SNU-1 (stomach cancer), MCF-7 (breast cancer) and Widr (colon cancer) were examined. The antioxidant activities and growth inhibitory effects on cancer cells of hot water extracts of peel were higher than those of pith, and the activities were dose-dependent. The roasting temperature showing the highest antioxidant activities and growth inhibitory effects on cancer cells was in the range of $170\~200^{\circ}C$ The lipid peroxidation and formation of DPPH free radicals of hot water extracts of roasted pith and peel were inhibited to 50.9, $56.5\%\;and\;79.0,\;78.4\%$ at the concentration of $500\mu g/mL$, respectively. The growth inhibitory effects of roasted pith and peel on cancer cells were in the order of Widr (41.5, $36.0\%$) > HepG2 (61.5, $44.0\%$) > MCF-7 (92.0, $69.2\%$)> SNU-1 (100, $100\%$) cells at the concentration of $1,000\mu g/mL$ as compared with the control, respectively. These results suggest that roasted Rhus verniciflua Stokes could be an useful natural medicinal plant for colon cancer.

옻나무의 속과 껍질부분을 분리해 $170,200,220^{\circ}C$로 온도를 달리하여 볶은 후 $100^{\circ}C$에서 열수 추출하여 얻은 추출물의 과산화지질생성 억제능, DPPH 유리라디칼 소거능 및 4종류의 인체유래의 암세포 즉 간암세포 HepG2, 위암세포 SNU-1, 유방암세포 MCF-7 및 대장암세포 WiDr에 대한 성장저지효과를 알아보았다. 저농도보다 고농도에서, 속보다 껍질부분이, $170\~200^{\circ}C$범위로 볶음처리를 한 시료의 과산화지질생성 억제능, 유리라디칼 소거능 및 암세포의 성장 저지효과가 높았다 가장 높은 과산화지질생성 억제능은 $200^{\circ}C$에서 볶은 속과 껍질추출물을 $500\mu g/mL$의 농도로 첨가 시 50.9, $56.5\%$였고, 유리라디칼 소거능은 각각 200, $170^{\circ}C$에서 볶은 속과 껍질추출물을 $500\mu g/mL$의 농도로 첨가 시 79.0, $8.4\%$였다. 또한 암세포 생존율은 $1,000\mu g/mL$의 농도로 첨가 시 가장 낮았는데 속과 껍질추출물 첨가군의 생존율은 WiDr세포가 $170^{\circ}C$에서 볶음처리 시 41.5, $36.0\%$로 가장 낮았고 ,다음은 HepG2세포로 $200^{\circ}C$에서 볶음처리 시 61.5, $44.3\%$, 이어서 MCF-7세포가 $170^{\circ}C$에서 닥음처리 시 92.0, $69.2\%$였으며, SNU-1세포는 볶음처리와 상관없이 100, $100\%$의 순으로 높아 특히 WiDr세포에 대한 성장저지효과가 현저하게 높음을 알 수 있었다. 또한 WiDr세포에 대해서는 $1,000\mu g/mL$의 농도에서 볶음처리를 하지 않은 속과 껍질추출물에서도 63.9, $6.8\%$의 낮은 생존율을 보여 옻나무는 사용한 암세포 중 대장암세포에서 강한 암세포성장 저지활성을 나타내었다.

Keywords

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