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Antioxidant activities and anti-inflammatory effects of fresh and air-dried Abeliophyllum distichum Nakai leaves

건조방법에 따른 미선나무 잎의 항산화 및 항염증 효과

  • Chang, Seong Jun (Teakyung food and processing R&D center) ;
  • Jeon, Nam Bae (Teakyung food and processing R&D center) ;
  • Park, Joo Won (Teakyung food and processing R&D center) ;
  • Jang, Tae Won (Department of Medicinal Plant Resources, Andong National University) ;
  • Jeong, Jin Boo (Department of Medicinal Plant Resources, Andong National University) ;
  • Park, Jae Ho (Department of Medicinal Plant Science, Jungwon University)
  • Received : 2017.12.06
  • Accepted : 2018.01.26
  • Published : 2018.02.28

Abstract

In this study, we evaluated the antioxidant activity and anti-inflammatory effects of Abeliophyllum distichum (A. distichum) leaves that were prepared via air-drying. Fresh and air-dried A. distichum leaves were examined via 1,1-diphenyl-2-picryl hydrazyl (DPPH) radical, and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS) radical scavenging assay and measurements of the reducing power. The suppression effects on inflammation of the leaves were analyzed by a western blot and RT-PCR on LPS-induced RAW 264.7 cells. As a result, the antioxidant activity of the fresh leaves was found to be more effective than that of the air-dried leaves. Also, the fresh leaves were more effective in suppressing the protein and mRNA levels of iNOS and COX-2 than the air-dried leaves, thereby indicating the better anti-inflammatory effects. In addition, the contents of phenolic compounds and acteoside were analyzed by high-performance liquid chromatography (HPLC). The results showed that the acteoside content decreased with the use of the air-drying method, while there was no change in the content of phenolic compounds. Therefore, this study indicated that fresh A. distichum leaves potential antioxidant and suppression activities of various factors that are involved in the production of NO, which were found to be better than those of air-dried A. distichum leaves. These biological activities were also found to be independent of the content of phonolic compounds and were assumed to be directly or indirectly related to the content of acteoside.

건조 방식에 따른 미선나무 잎의 항산화 활성 및 항염증 효과를 확인한 결과, 높은 항산화 활성를 나타냈으며, 건조 잎에 비해 생잎의 항산화 활성이 뛰어났다. 페놀류 화합물의 함량은 유의적인 차이가 없었으나, 미선나무의 활성물질로 알려진 acteoside의 함량을 분석한 결과, 생잎의 acteoside의 함량이 높았다. 또한 항염증 효과를 확인하기 위해 nitric oxide의 함량 및 세포 수준에서의 염증 관련 인자인 iNOS와 COX-2의 단백질 발현 및 mRNA 수준을 확인한 결과, 생잎의 억제활성이 건조잎보다 높았다. 이를 통해 건조 잎에 비해 생잎의 이용가치가 높았으며, 이러한 항산화 및 항염증 활성은 acteoside의 함량의 차이와 밀접한 관련이 있는 것으로 사료된다.

Keywords

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