Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Inhibitory Effect of Naringenin on MMP-9 Activity and Expression in HT-1080 Cells

Naringenin이 NF-$\kappa$B, AP-1 억제를 통한 MMP-9 활성 및 발현 억제 효과

  • Chae, Soo-Chul (Department of Biology, Chonnam National University) ;
  • Kho, Eun-Gyeong (Department of Biology, Chonnam National University) ;
  • Seo, Eun-Sun (Department of Biology, Chonnam National University) ;
  • Ryu, Geun-Chang (Department of Ophthalmic Optics, Dongshin University) ;
  • Na, Myung-Suk (Department of Beauty & Science, Kwangju Women's University) ;
  • Kim, In-Suk (Department of Ophthalmic Optics of Chodang University) ;
  • Lee, Jong-Bin (Department of Biology, Chonnam National University)
  • Published : 2009.02.28
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Abstract

The chemopreventive effects of naringenin derived from citrus on tumor migration and the possible mechanisms involved in this protection were investigated in HT-1080 tumor cells. In this study, we found that naringenin reduced phorbol 12-myristate 13-acetate (PMA)-enhanced matrix metalloproteinases (MMP)-9 activation in a dose-dependant manner and further inhibited HT-1080 cell migration. In addition, naringenin suppressed PMA-enhanced expression of MMP-9 protein, mRNA and transcription activity levels through suppression of nuclear factor $\kappa$B (NF-$\kappa$B) activation and activator protein-1 (AP-1) translocation without changing tissue inhibitor of metalloproteinase (TIMP)-1 level. Therefore, our results suggested that the inhibitory effects of naringenin on MMP-9 activation, relation of tumor migration in vitro possibly involve mechanisms related to its ability to suppress PMA-enhanced MMP-9 gene and protein expression through NF-$\kappa$B activation and AP-1 translocation. Overall, naringenin may be a valuable anti-invasive drug candidate for cancer therapy.

Naringenin은 flavonoid구조의 감귤류 과피에 다량 함유되어 있으며 항암 및 항산화 등의 다양한 생리활성을 가지는 것으로 보고되었다. 이에 본 연구에서는 HT-1080 섬유육종세포의 전이에 대한 영향을 조사하였다. 먼저 Naringenin이 암세포의 이동에 미치는 영향을 알아보기 위해 migrationassay를 한 결과, Naringenin이 암세포의 이동을 농도 의존적으로 억제시켰다. 암의 전이에 있어서 매우 중요한 역할을 하는 단백질분해효소인 matrix metalloproteinase-9 (MMP-9)의 활성도를 측정하기 위해 gelatin zymography를 한 결과, Naringenin이 PMA에 의해 증가된 MMP-9의 효소 활성도를 농도 의존적으로 감소시켰다. 또한 MMP-9와 TIMP-1의 유전자 발현에 대한 Naringenin의 영향을 RT-PCR방법으로 조사한 결과, Naringenin이 PMA에 의해 증가된 MMP-9의 mRNA발현을 농도 의존적으로 감소시켰으나 TIMP-1의 mRNA발현에는 변화가 없었다. MMP-9발현 감소에 관여하는 전사조절인자를 확인하기 위해 promoterassay를 한 결과, Naringenin이 PMA에 의해 증가된 MMP-9 및 NF-$\kappa$B, AP-1의 Promoter활성을 농도 의존적으로 감소시 켰다. 또한 MMP-9의 전자조절인자인 NF-$\kappa$B와 AP-1의 결합 활성도를 electrophoretic mobility shift assay로 확인한 결과 Naringenin이 PMA에 의해 증가된 NF-$\kappa$B와 AP-1의 결합 활성도를 농도 의존적으로 감소시켰다. 결론적으로 Naringenin이 전사조절인자인 NF-$\kappa$B와 AP-1의 활성을 억제함으로써 MMP-9의 유전자 발현 및 효소 활성을 억제하고 그 결과 암세포의 이동과 침윤을 억제하는 것을 알 수 있다.

Keywords

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