Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Effect of Graphene with Antioxidant Activity on Matrix Metalloproteinase in HT1080 Cells

항산화 활성을 가진 그래핀이 HT1080 세포에서 기질금속단백질분해효소에 미치는 영향

  • Received : 2013.08.30
  • Accepted : 2013.10.24
  • Published : 2013.10.30
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Abstract

Graphene is an allotrope of carbon that is composed of one-atom-thick planar sheets. It is known to have a preventive effect on cancer in photothermal therapy and a protective effect in DNA oxidation. The effect of graphene on oxidative stress and matrix metalloproteinases (MMPs) was investigated in human fibrosarcoma HT1080 cells. The results showed that graphene specifically exerted an inhibitory effect on DNA oxidation, but it did not inhibit other oxidative stress. In addition, graphene decreased the expression and the activation of MMP-2 and MMP-9 stimulated by phenazine methosulfate-m, which induces the production of intracellular hydrogen peroxide. In particular, the expression of antioxidant enzymes, such as superoxide dismutase (SOD-2), was decreased in the HT1080 cells, indicating that the decrease in the expression level of SOD was due to the antioxidant effect of graphene. These results suggest that the inhibitory effect of oxidative stress in the presence of graphene could inhibit the expression of MMPs in HT1080 cells. Based on the above results, graphene may have chemoprevention properties through inhibition of MMP-2 and MMP-9 related to metastasis.

그래핀(graphene)은 원자 하나의 두께를 가지는 흑연(graphite)의 단층으로서 탄소구조체들 중 하나이다. 그래핀은 최근 의학분야에서 광열요법을 이용한 암 발생의 예방효과와 DNA의 산화에 대한 보효효과를 가진다고 밝혀진 바 있다. 본 연구에서는 사람 섬유아육종세포(HT1080)에서 산화 스트레스와 MMPs에 대한 그래핀의 효과가 조사되었다. 항산화 효과에 대한 연구에서 그래핀은 DNA 산화에 대한 억제효과를 특이하게 나타내었으나 다른 산화 스트레스는 억제하지 않았다. 뿐만 아니라 그래핀은 세포 내 과산화수소를 생성시키는 phenazinemethosulfate(PMS)에 의하여 자극된 MMP-2 및 MMP-9의 발현과 활성을 감소시켰다. 특히 superoxide dismutase(SOD-2)와 같은 항산화 효소의 발현이 HT1080세포에서 감소하였는데, 이것이 시사하는 바는 SOD 발현수준의 감소가 그래핀의 항산화 효과로부터 기인 되었다는 것을 나타낸다. 이상의 결과로 그래핀의 존재에서 산화스트레스의 억제효과가 HT1080 세포에서 MMP-9의 활성과 발현을 감소시킬 수 있다는 것을 암시하고 있다. 이러한 연구 결과를 바탕으로 그래핀은 암 전이와 관련 있는 MMP-2 및 MMP-9의 활성과 발현의 억제를 통하여 암 억제에 도움을 줄 수 있어, 산업화를 위한 하나의 우수한 생의학 응용소재로 이용될 수 있으리라 기대된다.

Keywords

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