Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Protective Effect of Isoflavone, Genistein from Soybean on Singlet Oxygen Induced Photohemolysis of Human Erythrocytes

$^1O_2$으로 유도된 사람 적혈구의 광용혈에 있어서 대두의 아이소플라본인 제니스테인의 보호작용

  • Park, Soo-Nam (Department of Fine Chemistry, Seoul National University of Technology)
  • 박수남 (서울산업대학교 정밀화학과)
  • Published : 2003.06.01
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Abstract

Protective effects of natural components including genistein (4',5,7-trihydroxyisoflavone) from Glycine max MERRILL on the rose-bengal sensitized photohemolysis of human erythrocytes were investigated. Genistein $(10{\sim}100\;{\mu}m)$ suppressed photohemolysis in a concentration-dependent manner, and was more effective than the lipid peroxidation chain blocker, ${\alpha}$-tocopherol (Vit. E). Glycoside of genistein, genistin, the water-soluble antioxidant, L-ascorbate, and the iron chelator, myo-inositol hexaphosphoric acid dodecasodium salt (sodium phytate) did not exhibit protective effect against photohemolysis. L-Ascorbate and sodium phytate stimulated photohemolysis at high concentration $(500\;{\mu}m)$. ${\alpha}$-Carotene 3,3'-diol (lutein), a singlet oxygen $(^1O_2)$ quencher, exhibited pronounced protective effect, an indication that $^1O_2$ is important in photohemolysis sensitized by rose-bengal. Reactive oxygen scavenging activities $(OSC_{50})$ of natural antioxidants including genistein on reactive oxygen species (ROS) generated in $Fe^{3+}-EDTA/H_2O_2$ system using the luminol-dependent chemiluminescence assay were in the order of sodium phytate > L-ascorbate > ${\alpha}$-tocopherol > genistein > genistin. $OSC_{50}$ value of genistein, genistin, ${\alpha}$-tocopherol, L-ascorbate, and sodium phytate were 41.0, 109.0, 9.0, 5.2, and $0.56{\mu}m$ respectively. The order of free radical (1,1-diphenyl-2-picrylhydrazyl, DPPH) scavenging activity $(FSC_{50})$ was L-ascorbate > ${\alpha}$-tocopherol > genistein > genistin. These results indicate that genistein can function as an antioxidant in biological systems, particularly skin exposed to solar UV radiation by scavenging $^1O_2$ and other ROS, and to protect cellular membranes against ROS.

자외선에 노출된 피부에서 생성된 활성산소종에 의한 산화적 스트레스는 세포 구성 성분들을 손상시키고 궁극적으로는 피부 광노화 및 발암을 야기시킬 수 있다. 이 연구에서는 대두(Glycine max MERRILL)의 성분인 genistein(4',5,7-trihydroxyisoflavone)을 포함하는 몇 가지 천연 황산화제들에 대하여 로즈벵갈로 증감된 사람 적혈구의 광용혈에 대한 보호효과를 조사하였다. Genistein$(10-100\;{\mu}M)$은 농도-의존적으로 광용혈을 억제하였다. 그리고 지질 과산화 연쇄반응의 차단제인 ${\alpha}$-tocopherol보다도 더 효과적이었다. 그러나, Genitein의 배당체인 genistin, 소용성 항산화제인 L-ascorbate, 철-킬레이트제인 sodium phytate는 광용혈에 대하여 보호 효과를 나타내지 않았다. 오히려 보다 높은 농도$(500\;{\mu}M)$에서는 L-ascorbate와 sodium phytate 모두 광용혈을 촉진시켰다. 반면, $^1O_2$ 소광제로 알려진, ${\alpha}$-carotene 3,3'-diol은 현저한 보호 효과를 보여주었다. 이 결과는 로즈벵갈로 증감된 광용혈에 있어서 $^1O_2$이 중요함을 가리킨다. Luminol-의존성 화학발광법을 이용하여, $Fe^{3+}-EDTA/H_2O_2$ 계에서 생성된 ROS에 대한 몇가지 천연 항산화제들의 ROS 소거활성을 측정하였다. 활성 산소 소거활성$(OSC_{50})$의 크기는 sodium phytate > L-ascorbate>${\alpha}$-tocopherol > genistein > genistin순이었다. Gnistein, genistin, ${\alpha}$-tocopherol, L-ascorbate 및 sodium phytate의 활성산소 소거활성$(OSC_{50})$은 각각 41.0, 109.0, 9.0, 5.2, 및 $0.56{\mu}M$이었다. Free radical 소거활성$(FSC_{50})$의 크기는 L-ascorbate > ${\alpha}$-tocopherol > genistein > genistin순으로 나타났다. 이상의 결과들은 genistein이 $^1O_2$ 혹은 다른 ROS를 소거함으로써 그리고 ROS에 대항하여 세포막을 보호함으로써 생체계, 특히 태양 자외선에 노출된 피부에서 항산화제로서 작용할 수 있음을 가리킨다.

Keywords

References

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