Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Anti-oxidant and Anti-inflammatory Potentials of Sasa quelpaertensis Leaf Residue Extracts

제주조릿대 잎 잔사 추출물의 항산화 및 항염 활성

  • Lee, Ju-Yeop (Jeju Sasa Industry Development Agency, Jeju National University) ;
  • Song, Hana (Jeju Sasa Industry Development Agency, Jeju National University) ;
  • Ko, Hee-Chul (Jeju Sasa Industry Development Agency, Jeju National University) ;
  • Jang, Mi-Gyeong (Department of Biology, Jeju National University) ;
  • Kim, Se-Jae (Jeju Sasa Industry Development Agency, Jeju National University)
  • 이주엽 (제주대학교 제주조릿대 RIS사업단) ;
  • 송하나 (제주대학교 제주조릿대 RIS사업단) ;
  • 고희철 (제주대학교 제주조릿대 RIS사업단) ;
  • 장미경 (제주대학교 생물학과) ;
  • 김세재 (제주대학교 제주조릿대 RIS사업단)
  • Received : 2018.01.31
  • Accepted : 2018.03.26
  • Published : 2018.06.30
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Abstract

Sasa quelpaertensis Nakai is a native Korean plant that grows only on Mt. Halla of Jeju Island. Its leaf is used for a popular bamboo tea due to its various health-promoting properties, and it has been increasingly used as food and cosmetic ingredients. To utilize the S. quelpaertensis leaf efficiently, the preparation method for phytochemical-rich extract (PRE) using the leaf's residue was previously reported, which was produced after hot water extraction. This study was undertaken to evaluate the anti-oxidant and anti-inflammatory potential of PRE and its solvent fractions. The ethyl acetate fraction of PRE (EPRE) showed higher DPPH, ABTS, and superoxide radical scavenging activities, and it effectively inhibited intracellular reactive oxygen species (ROS) and nitric oxide (NO) production in lipopolysaccharides (LPS)-stimulated RAW 264.7 cells. EPRE also induced the expression of heme oxygenase-1 (HO-1) by increasing the level of nuclear factor E2-related factor 2 (Nrf2) in a nuclear fraction. The inhibiting effect of EPRE on LPS-induced NO production was partially reversed by the HO-1 inhibitor (zinc protoporphyrin, ZPP), suggesting that HO-1 is involved in suppressing NO production. Taken together, the results suggest that EPRE has potential as a promising anti- oxidant and anti-inflammatory agent.

제주조릿대는 한라산 일대에서 자생하는 제주특산식물이다. 예로부터 조릿대 잎은 다양한 약리효과를 가지고 있어 전통의약에서 사용되어 왔을 뿐만 아니라 최근에는 식품 및 화장품 소재로서 활용되고 있다. 우리 연구팀은 제주조릿대 잎의 효율적인 산업적 활용을 촉진하기 위하여 열수 추출한 후 남는 잔사로부터 식물화합물을 다량으로 함유한 잔사 추출물(PRE)을 제조하는 방법을 보고한 바 있다. 본 연구는 PRE 및 분획물이 항산화 혹은 항염소재로서 활용 가능성을 평가하기 위하여 수행하였다. PRE 에틸아세테이트 분획물(EPRE)은 DPPH, ABTS, superoxide 자유기 소거활성이 우수하였고, LPS로 자극한 RAW 264.7 세포에서 활성 산소종(ROS)과 nitric oxide (NO) 생성을 효과적으로 억제하였다. EPRE는 nuclear factor E2-related factor 2 (Nrf 2)의 핵내 이동을 증가시킴으로써 heme oxygenase-1 (HO-1)의 발현을 유도하였다. HO-1 저해제인 zinc protoporphyrin (ZPP)은 EPRE에 의한 NO 생성 저해 능을 감소시키기 때문에 HO-1이 NO 생성 억제에 관여함을 알 수 있었다. 본 연구결과는 PRE와 EPRE가 항산화 및 항염 소재로서의 활용 가능성을 제시해 준다.

Keywords

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