Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Functionality Analysis of Rhus javanica Fermented by Lactobacillus spp.

Lactobacillus spp. 이용 발효 붉나무의 기능성물질 검색에 대한 연구

  • Lee, Dong-Sung (Hanbang Body-Fluid Research Center, Wonkwang University) ;
  • Kang, Min-Su (Department of Microbiology, College of Natural Sciences, Keimyung University) ;
  • Kim, Youn-Chul (Hanbang Body-Fluid Research Center, Wonkwang University) ;
  • Im, Nam-Kyung (Institute for New Drug Development, Keimyung University) ;
  • Kim, Hyun-Su (Department of Microbiology, College of Natural Sciences, Keimyung University) ;
  • Jeong, Gil-Saeng (Institute for New Drug Development, Keimyung University)
  • 이동성 (원광대학교 체액조절연구센터) ;
  • 강민수 (계명대학교 자연과학대학 미생물학과) ;
  • 김윤철 (원광대학교 체액조절연구센터) ;
  • 임남경 (계명대학교 신약개발연구소) ;
  • 김현수 (계명대학교 자연과학대학 미생물학과) ;
  • 정길생 (계명대학교 신약개발연구소)
  • Received : 2012.11.02
  • Accepted : 2012.11.26
  • Published : 2013.01.30
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Abstract

To determine the potential function of Rhus javanica in Korean medicine, it was fermented with each strain of Lactobacillus spp. Each strain of Lactobacillus spp. was inoculated in lactobacilli MRS broth, and 5 mg/ml of methanol extract of Rhus javanica was added. In mouse hippocampal HT22 cells, ethyl acetate extract of R. javanica fermented with L. brevis KCTC 3498 induced heme oxygenase-1 expression and showed a significant cytoprotective effect on glutamate-induced oxidative damage. The cytoprotective effect was related to the transcription of the nuclear factor E2-related factor2 (Nrf2), which is responsible for the induction of heme oxygenase-1 within the nucleus. The antimicrobial, antioxidant, and heme oxygenase-1 expression activities of fermented R. javanica were measured after extraction with ethyl acetate. R. javanica fermented with L. plantarum subsp. plantarum KCTC 3108, L. fermentum KCTC 3112, and L. brevis KCTC 3498 had higher antioxidant activity than nonfermented R. javanica. The fermented R. javanica with L. plantarum subsp. plantarum KCTC 3108, L. casei KCTC 3109 after ethyl acetate extraction showed antibacterial activity against Bacillus subtilis PCI 219, Escherichia coli KCTC 1682, Shigella flexneri KCTC 2517, Vibrio parahaemolyticus KCTC 7471, and Pseudomonas aeruginosa KCTC 2004. An ethyl acetate extract of the fermented R. javanica with Lactobacillus brevis KCTC 3498 exhibited stronger antibacterial activity than a nonfermented one against strains of B. subtilis PCI 219, E. coli KCTC 1682, S. flexneri KCTC 2517, and V. parahaemolyticus KCTC 7471.

본 연구에서는 한약재를 Lactobacillus속 균주로 발효시켜 기능성물질을 확인하고자 하였다. 선행연구를 통해 선별한 발효에 사용한 10가지 한약은 100% methanol로 추출하여 Lactobacillus속 균주와 MRS배지를 첨가하여 사용하였고 발효 후 ethyl acetate로 추출하여 사용하였다. 10가지 중 붉나무를 Lb. brevis KCTC 3498로 발효하고 ethyl acetate로 추출한 추출물에서 마우스 해마 유래 세포주인 HT22 세포에서 glutamate로 유발된 산화적 손상으로부터 세포 보호효과가 우수했으며, 이는 heme oxygenase-1 단백질 발현에 의한 것 임을 밝혔다. 또한, 뇌세포 보호에 heme oxygenase-1 발현의 주요 기전인 Nrf2 핵 내의 전사와 직접적인 연관이 있음을 확인하였다. 붉나무의 발효 전과 후의 항균, 항산화 효과 비교 실험에서는 붉나무를 Lb. plantarum subsp. plantarum KCTC 3108, Lb. fermentum KCTC 3112, Lb. brevis KCTC 3498 균주로 각각 발효한 한약재는 발효 전보다 항산화 활성이 높아지거나 비슷한 수준으로 나타났다. Lb. plantarum subsp. plantarum KCTC 3108, Lb. casei KCTC 3109로 발효한 붉나무 발효액과 ethyl acetate 여액층은 Bacillus subtilis PCI 219, Escherichia coli KCTC 1682, Shigella flexneri KCTC 2517, Vibrio parahaemolyticus KCTC 7471, Pseudomonas aeruginosa KCTC 2004에 모두 항균활성을 보였다. 붉나무를 Lb. brevis KCTC 3498로 발효하여 ethyl acetate로 추출한 추출물은 B. subtilis PCI 219, E. coli KCTC 1682, S. flexneri KCTC 2517, V. parahaemolyticus KCTC 7471 균주에서 발효한 추출물이 단순 붉나무 추출물보다 높은 항균활성을 보였다.

Keywords

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