Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Neuroprotective Effects of Methanolic Extracts from Peanut Sprouts

땅콩나물 추출물의 신경세포 보호 효과

  • Kim, Hyun-Jung (Department of Food Science and Biotechnology, Kyungnam University) ;
  • Kang, Jum-Soon (Department of Horticultural Bioscience, Pusan National University) ;
  • Park, Hae-Ryong (Department of Food Science and Biotechnology, Kyungnam University) ;
  • Hwang, Yong-Il (Department of Food Science and Biotechnology, Kyungnam University)
  • 김현정 (경남대학교 식품생명학과) ;
  • 강점순 (부산대학교 원예생명과학과) ;
  • 박해룡 (경남대학교 식품생명학과) ;
  • 황용일 (경남대학교 식품생명학과)
  • Received : 2009.12.28
  • Accepted : 2010.02.01
  • Published : 2010.02.28
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Abstract

The neuroprotective effects of extracts from various parts of peanut sprouts on glutamate-induced neurotoxicity in N18-RE-105 cells were investigated. This study was performed to evaluate the neuroprotective activity of methanolic extracts from the whole (WME), heads (HME), and stems (SME) of peanut sprouts. The neuroprotective effects of these extracts were measured by MTT reduction assay, LDH release assay, phase-contrast microscopy, and flow cytometric analysis on the N18-RE-105 cells. Among these extracts, the HME showed the greatest neuroprotective effects, and was further fractionated with hexane, diethyl ether, ethyl acetate, and water, according to degree of polarity. Out of the fractionated extracts, the diethyl ether layer showed the highest activity on glutamate-induced cytotoxicity in N18-RE-105 cells. The sub-G1 DNA contents of the glutamate-induced severely apoptotic N18-RE-105s were measured by flow cytometric analysis to confirm the HME's anti-apoptotic activity. Interestingly, after incubation with 100 mg/ml of the HME, the proportion of sub-G1 cells of the glutamate-stressed N18-RE-105s had been greatly reduced, from 58.5% to 9.1%. These results imply that HME may have strong potential as a chemotherapeutic agent against neuronal diseases.

본 연구는 땅콩나물 추출물이 glutamate가 유도하는 세포독성으로부터 신경세포를 보호하는 효과를 확인하였다. 땅콩나물을 부위별로 전체, 머리, 줄기 부분으로 나누어 methanol로 처리하여 얻어진 각각의 추출물 WME, HME 그리고 SME를 이용하여 glutamate에 의하여 유도된 세포독성에 대한 신경세포보호효과를 관찰하였다. 기지의 신경세포 N18-RE-105 세포주를 이용하여 MTT reduction assay, LDH release assay, 형태학적인 변화 및 apoptosis를 관찰한 결과로부터 HME에서 효율적인 신경세포보호효과를 보였다. 다음으로 HME를 이용하여 hexane, diethyl ether, ethyl acetate, water 층으로 분획하여 신경세포 보호 효과를 확인한 결과, diethyl ether 층에서 가장 높은 활성을 확인할 수 있었다. 그리고 HME의 apoptosis 억제 효과를 확인하기 위하여 flow cytometric analysis를 실시한 결과에서 glutamate 만을 처리하였을 경우 sub-G1기 세포가 58.5%의 확인되었으나 HME를 100 mg/ml 동시 처리하였을 때에는 sub-G1 세포가 9.1%로 감소하여 높은 apoptosis 억제 효과를 확인할 수 있었다. 이상의 결과로부터 땅콩나물 머리 부분 methanol 추출물에는 glutamate에 의한 세포독성으로부터 신경세포를 보호하는 효과가 있다는 것을 알 수 있었다.

Keywords

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