KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Antioxidative and Protective Effects of Corn Silk (Zea mays L.) Extract on Human HaCaT Keratinocyte

옥수수수염 추출물의 항산화효과 및 피부각질세포 보호효과

  • Kim, Hyun Young (Crop Foundation Division, National Institute of Crop Science (NICS), Rural Development Administration (RDA)) ;
  • Seo, Woo Duck (Crop Foundation Division, National Institute of Crop Science (NICS), Rural Development Administration (RDA)) ;
  • Seo, Kyung Hye (Department of Herbal Crop Research, NIHHS, RDA) ;
  • Lee, Mi-Ja (Crop Foundation Division, National Institute of Crop Science (NICS), Rural Development Administration (RDA)) ;
  • Choi, Sik-Won (Crop Foundation Division, National Institute of Crop Science (NICS), Rural Development Administration (RDA)) ;
  • Lee, Kwang-Sik (Crop Foundation Division, National Institute of Crop Science (NICS), Rural Development Administration (RDA)) ;
  • Kim, Sun Lim (Crop Foundation Division, National Institute of Crop Science (NICS), Rural Development Administration (RDA)) ;
  • Kang, Hyeon Jung (Crop Foundation Division, National Institute of Crop Science (NICS), Rural Development Administration (RDA))
  • 김현영 (농촌진흥청 국립식량과학원 작물기초기반과) ;
  • 서우덕 (농촌진흥청 국립식량과학원 작물기초기반과) ;
  • 서경혜 (농촌진흥청 원예특작과학원 인삼특작부) ;
  • 이미자 (농촌진흥청 국립식량과학원 작물기초기반과) ;
  • 최식원 (농촌진흥청 국립식량과학원 작물기초기반과) ;
  • 이광식 (농촌진흥청 국립식량과학원 작물기초기반과) ;
  • 김선림 (농촌진흥청 국립식량과학원 작물기초기반과) ;
  • 강현중 (농촌진흥청 국립식량과학원 작물기초기반과)
  • Received : 2016.06.13
  • Accepted : 2016.08.12
  • Published : 2016.09.30
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Abstract

We investigated the antioxidative and protective effects of corn silk (Zea mays L.) ethanol extracts on human HaCaT cells and erythrocytes. The NICS-2 fraction, extracted from corn silk, exhibited favorable 1,1-diphenyl-2-picrylhydrazyl (DPPH) and 2-azino-bis-(3-ethylbenzothiazoline-6-sulphonic acid (ABTS) radical scavenging activities with $IC_{50}$valuesof$13.3{\pm}0.3{\mu}g/mL$ and $14.2{\pm}0.1{\mu}g/mL$ when compared with those of ${\alpha}$-tocopherol, a positive control, with $IC_{50}=10.4{\pm}02.2$ and $22.2{\pm}3.6{\mu}g/mL$, respectively. In addition, we investigated skin protection effects of NICS extracts of corn silk in HaCaT keratinocytes. To investigate the pharmacological potential of NICS-1 and NICS-2 extracts of corn silk on UV-B-induced damage in HaCaT cells, we measured the activity of interleukin (IL) 1a. Our results showed that all the corn silk extracts inhibited the UV-B-induced activity of IL-1a. In particular, NICS-1 extracts of corn silk significantly suppressed IL-1a activity in a dose-dependent manner without inducing cytotoxicity. These results indicate that the ethanol extracts of corn silk (Zea mays L.) could function as natural cytoprotective agents and antioxidants in biological systems, particularly the skin exposed to UV radiation, by protecting cellular membrane against reactive oxygen species (ROS).

본 연구는 옥수수수염 조추출물과 메이신 함량이 높은 고분획물(NICS-1, NICS-2)의 항산화 활성과 피부 각질형성세포의 세포손상 억제활성을 구명하여 옥수수의 부산물인 수염을 이용하여 기능성식품 및 화장품으로 개발할 수 있는 기초자료를 얻고자 수행하였한 결과는 옥수수수염 유래 주정 추출물과 메이신이 고함유된 추출물(NICS-1, NICS-2)의 DPPH와 ABTS활성산소 제거활성을 비교한 결과 주정 추출물에 비해 NICS-1은 약 6.5, 3.8배 높았고, NICS-2 분획물은 약 6.2, 5.6배 높은 활성을 나타내었으며 NICS-2 분획물이 가장 높은 항산화 활성을 나타내었다. 피부손상을 일으키는 자외선의 흡수도는 NICS-1과 NICS-2 각각 343, 271 nm와 352, 271 nm에서강한 흡수능을 나타내었고 자외선 처리에 의한 각질형성세포(HaCaT)의 세포손상억제도 5, 10, 50 ppm 처리시 각각 NICS-1은 56.8%, 61.2%, 71.8%와 NICS-2는 각각 59.5%, 76.0%, 80.6%의 세포생존율을 농도 의존적으로 보여 UV-A,B,C에 의해 발생하는 피부의 손상을 옥수수수염 추출물이 개선할 수 있을 것으로 생각되었으며, 자외선에 의한 피부손상 억제의 작용기작은 옥수수수염 추출물뿐만 아니라 고분획물(NICS-1, NICS-2)의 항산화 활성뿐만 아니라 각질형성세포의 염증을 일으키는 싸이토카인인 $IL-1{\alpha}$ 생성량을 농도 의존적으로 억제하는 것으로 나타내었고 특히 옥수수수염의 메이신 화합물이 더 큰 피부손상억제 활성을 나타내었다. 옥수수수염 추출물(NICS-1)은 각각 114.2, 96.1, 73.7, 42.6%의 $IL-1{\alpha}$ 생성억제 활성을 보였고, 메이신은 각각 96.5, 86.7, 52.3, 32.3%의 $IL-1{\alpha}$ 생성 억제 활성을 보여 옥수수수염추출물(NICS-1) 및 메이신이 농도 의존적으로 자외선 조사에 의한 염증성 사이토카인의 발현이 감소하는 것을 확인하였다. 또한 옥수수수염 추출물(NICS-1)에 비해 메이신 단일 화합물의 자외선 조사에 의한 염증성 사이토카인의 발현을 감소시키는 효과가 더 큰 것으로 나타났다.

Keywords

References

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