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Anti-inflammatory activities of fermented Rhus verniciflua stem bark extract and its growth inhibitory effect on Helicobacter pylori

발효옻 추출물의 헬리코박터파이로리 생장억제 및 항염증 활성

  • Choi, Eun Yeong (Applied Plant Sciences Program, Kangwon National University) ;
  • Suk, Ki Tae (Department of Internal Medicine, Hallym University College of Medicine) ;
  • Choi, Han Seok (Fermented Food Science Division, National Academy of Agricultural Science, RDA) ;
  • Kim, Myung Kon (Department of Food Science and Technology, Chonbuk National University) ;
  • Kwon, Yong Soo (Department of Pharmacy, Kangwon National University) ;
  • Kim, Myong Jo (Bioherb Research Institute, Kangwon National University)
  • 최은영 (강원대학교 식물자원응용과학전공) ;
  • 석기태 (한림대학교 의과대학 내과학교실) ;
  • 최한석 (농촌진흥청 국립농업과학원 발효식품과) ;
  • 김명곤 (전북대학교 식품공학과) ;
  • 권용수 (강원대학교 약학과) ;
  • 김명조 (강원대학교 한방바이오연구소)
  • Received : 2016.05.18
  • Accepted : 2016.06.21
  • Published : 2016.10.31

Abstract

This study was designed to investigate the beneficial effects of fermented Rhus verniciflua stem bark extract (RVSBE) on the stomach. We evaluated RVSBE for its antimicrobial activity against Helicobacter pylori (H. pylori), along with its ability to reduce the viability of human gastric cancer AGS cells. In addition, its anti-inflammatory effect was examined by evaluating nitric oxide (NO) production, and inducible nitric oxide synthase (iNOS) and cyclooxygenase (COX)-2 mRNA expression in lipopolysaccharide (LPS)-stimulated RAW264.7 cells. RVSBE showed antimicrobial activity, as 2.0 mg of the extract produced a clear inhibition zone of 4.0 mm. RVSBE inhibited the growth of AGS cells by 20% at concentrations ranging from 0.25-1.0 mg/mL. Regarding the anti-inflammatory effects of RVSBE, at 0.1-1.0 mg/mL, the extract showed more than 75% inhibition of NO production. In addition, cells treated with 0.25 mg/mL RVSBE showed a 25% decrease in iNOS mRNA levels compared to those in the LPS-treated cells. These results suggest that RVSBE may have significant inhibitory effects on inflammatory mediators, and therefore, may be a potential anti-inflammatory candidate.

본 연구는 장수버섯(Fomitella fraxinea)을 이용하여 발효처리 한무독화 옻나무 추출물의 위장기능 개선능을 확인하고자 발효옻추출물을 이용하여 H. pylori 생장억제활성, 위암세포 생장억제활성과 항염증 활성을 평가하였다. H. pylori를 접종한 배지에 발효옻 추출물을 농도별로 첨가하였을 때 2.0 mg의 농도에서 4.0 mm의 생장억제환을 확인하였으며, 발효옻 추출물을 배지에 1.0-5.0 mg 농도로 혼합한 후 H. pylori을 접종한 경우에도 생장억제능이 확인되었다. 이를 바탕으로 세포 수준에서 H. pylori에 의해 유발된다고 알려진 위암과 위염 개선능을 평가하고자 세포독성을 나타내지 않은 0.1-1.0 mg/mL의 농도범위로 AGS 위암세포 생장억제활성 및 NO 생성 저해율을 확인하였다. 실험결과 0.25 mg/mL 이상의 농도에서 20% 이상의 위암세포 생장억제활성을 확인하였으며, LPS로 염증을 유도한 RAW 264.7 세포에서 추출물 0.25 mg/mL처리시 90%의 높은 NO 생성 저해율을 확인하였다. 염증유발인자인 iNOS와 COX-2의 발현 억제율은 0.50 mg/mL 농도에서 각각 50, 10%의 억제율을 보여 NO 생성저해율은 iNOS에 의한 영향인 것으로 사료된다. 상기 결과로 발효옻 추출물은 H. pylori 생장억제능 및 높은 NO 생성저해 활성이 확인됨으로서 간접적인 위암발생 억제제 및 항염증제로서의 이용가능성을 확인하였다. 따라서 발효옻 추출물을 이용한 위장개선 식의약 소재로서의 개발 가능성이 매우 높은 것으로 생각되며 이를 위해 추가적인 연구가 진행되어야 할 것으로 사료된다.

Keywords

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