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Inhibitory Effects of Dropwort (Oenanthe javanica) Extracts on Memory Impairment and Oxidative Stress and the Qualitative Analysis of Isorhamnetin in the Extracts

미나리 추출물의 기억력 손상 억제와 산화스트레스 억제 효과 및 Isorhamnetin 분석

  • Won, Beom Young (Research & Development Center, Braintropia Co., Ltd.) ;
  • Shin, Ki Young (Department of Microbiology, College of Natural Science, Dankook University) ;
  • Ha, Hyun Jee (Research & Development Center, Braintropia Co., Ltd.) ;
  • Wee, Ji-Hyang (Food Research Center, Jeonnam Bioindustry Foundation) ;
  • Yun, Yeo Sang (Research & Development Center, Braintropia Co., Ltd.) ;
  • Kim, Ye Ri (Research & Development Center, Braintropia Co., Ltd.) ;
  • Park, Yong Jin (Research & Development Center, Braintropia Co., Ltd.) ;
  • Jung, Kyoung Ok (Food Research Center, Jeonnam Bioindustry Foundation) ;
  • Sung, Hea Mi (Food Research Center, Jeonnam Bioindustry Foundation) ;
  • Lee, Hyung Gun (Research & Development Center, Braintropia Co., Ltd.)
  • 원범영 ((주)브레인트로피아 기업부설연구소) ;
  • 신기영 (단국대학교 자연과학대학 미생물학과) ;
  • 하현지 ((주)브레인트로피아 기업부설연구소) ;
  • 위지향 ((재)전남생물산업진흥원 식품산업연구센터) ;
  • 윤여상 ((주)브레인트로피아 기업부설연구소) ;
  • 김예리 ((주)브레인트로피아 기업부설연구소) ;
  • 박용진 ((주)브레인트로피아 기업부설연구소) ;
  • 정경옥 ((재)전남생물산업진흥원 식품산업연구센터) ;
  • 성혜미 ((재)전남생물산업진흥원 식품산업연구센터) ;
  • 이형근 ((주)브레인트로피아 기업부설연구소)
  • Received : 2015.09.02
  • Accepted : 2015.11.16
  • Published : 2016.01.31

Abstract

This study was conducted to investigate effect of the acetylcholinesterase inhibitor activity, the protective effect of the extract on SH-SY5Y cell death by $H_2O_2$, the memory improvement from scopolamine-induced rat. Moreover, the antioxidant activity of isorhamnetin from the dropwort (Oenanthe javanica) was investigated. Acetylcholinesterase inhibitor activity was highest (28.59%) in Hwasun O. javanica extract (H-OJE). H-OJE and Naju O. javanica extract (N-OJE) were not significantly different. SH-SY5Y cell death deceased to 37.23% and 36.68% for H-OJE and N-OJE, respectively, following treatment with the extracts. O. javanica extracts showed a protective effect against $H_2O_2$-induced neurotoxicity. Treatment with O. javanica extracts slightly improved scopolamine-induced (1 mg/kg, i.p.) memory impairment in rats. H-OJE contained the highest total phenolic and flavonoid contents of 117 mg/g and 30 mg gallic acid equivalents/g, respectively, and had a DPPH radical scavenging activity ($SC_{50}$) of $113.8{\mu}g/mL$ and ABTS radical scavenging activity of $48.2{\mu}g/mL$, which was higher than the other extracts. The thiobarbituric acid reactive substances value was highest (50.2%) in H-OJE. Antioxidant activity differed significantly among dropwort extracts. Isorhamnetin was known as one of the flavonoid and for having neuroprotective effect. So we analyzed acid-hydrolyzed O. javanica extract HPLC. The results were that peak at 14 min and spectrum of the extracts was consistent with standard solution. The results of LC/MS/MS analysis were that the extract and standard solution were confirmed total ion chromatogram at identical time, precursor ion was 317 $[M-H]^+$ m/z, product ion was 302 $[M-H]^+$ m/z. Overall, the results showed that the dropwort extract led to memory improvement and had antioxidant activity. Based on these finding, further research to investigate the production of ethanol extract of dropwort as a processed food is warranted.

본 연구는 한국인이 일상생활에서 주로 상용하는 미나리에 대해 기억력 관련 효과와 항산화 효과, 미나리 추출물의 flavonoid 중 isorhamnetin을 분석하여 기능성식품 개발 및 이용에 기여하고자 실시하였다. Acetylcholinesterase의 활성 억제를 측정한 결과 화순미나리 추출물이 28.59%로 가장 높게 나타났으며, 나주미나리 추출물 25.11%와 유의적인 차이가 없었다. SH-SY5Y 세포사멸에 미치는 영향을 측정한 결과 DMSO와 비교하여 화순미나리 추출물 37.23%와 나주미나리 추출물 36.68%로 세포사멸이 유의적으로 감소하였다. 수동회피실험 결과 scopolamine 처리에 의해 기억력이 손상된 동물모델에서 미나리 추출물을 투여하였을 때 vehicle control보다 latency time이 높게 나타났다. DPPH 및 ABTS 라디칼 소거능 측정 결과 화순, 나주, 의령 미나리 추출물 모두 미나리 처리 그룹군 간에도 유의적 차이가 있었고(P<0.05), 화순미나리 추출물이 총 폴리페놀 함량 117 mg/g, 총 플라보노이드 함량 30 mg GAE/g으로 가장 높게 측정되었다. TBARS 측정 결과 미나리 추출물 $440{\mu}g/mL$의 농도에서 화순미나리 추출물이 50.7%의 억제력으로 가장 높았으며, 나주와 의령미나리 추출물보다 유의하게 높았다. 미나리 추출물의 플라보노이드 중 isorhamnetin을 분석한 결과 표준용액과 미나리 추출물의 머무름 시간이 14분대로 피크 유지시간이 일치하였으며, 동일한 spectrum을 나타내어 정확한 isorhamnetin의 분리를 확인하였다. 또한 LC/MS/MS를 통한 분석 결과 표준용액과 미나리 추출물에서 동일 시간대에 TIC를 확인하였고 precursor ion은 317 $[M-H]^+$ m/z, product ion은 302 $[M-H]^+$ m/z로 확인할 수 있었다. 이러한 연구 결과에 기초하여 미나리 추출물은 천연 항산화제와 기억력 개선제로써의 활용 가치를 시사한다고 사료된다. 또한 건강기능성 소재로서 식품산업 분야의 이용률 향상에 도움이 될 것으로 판단된다.

Keywords

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