Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Inhibition of Cell Invasion by Indole-3-Carbinol in OVCAR-3 Human Ovarian Cancer Cells

Indole-3-carbinol에 의한 OVCAR-3 인체 난소암세포의 침윤 억제

  • Choi, Yung-Hyun (Department of Biomaterial Control (BK21 program) and Blue-Bio Industry RIC, Dongeui University) ;
  • Kim, Sung-Ok (Department of Biomaterial Control (BK21 program) and Blue-Bio Industry RIC, Dongeui University)
  • 최영현 (동의대학교 대학원 바이오물질제어학과 및 블루바이오 소재 개발 센터) ;
  • 김성옥 (동의대학교 대학원 바이오물질제어학과 및 블루바이오 소재 개발 센터)
  • Received : 2011.03.18
  • Accepted : 2011.05.03
  • Published : 2011.07.30
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Abstract

In the present study, we investigated the effect of indole-3-carbinol (I3C), a natural compound present in vegetables, on the cell migration and invasion of OVCAR-3 ovarian cancer cells. Our results indicated that I3C inhibited the proliferation of OVCAR-3 cells, a process which was associated with inhibition of cell motility as determined by wound healing experiments and cell invasion studies. I3C treatment increased the tightness of the tight junctions (TJs), which was demonstrated by an increase in transepithelial electrical resistance and a decrease in paracellular permeability. The RT-PCR and immunoblotting results indicated that I3C repressed the levels of claudin-3 as well as claudin-4, proteins that comprise a major part of TJs and play a key role in the control and selectivity of paracellular transport. Furthermore, the activities of matrix metalloproteinase (MMP)-2 and MMP-9 were also decreased by treatment with I3C, which was connected with the down-regulation of their mRNAs and protein expression. The results suggest that I3C may be expected to inhibit cancer cell metastasis and invasion by restoring TJs and decreasing MMP activity in ovarian cancer cell line OVCAR-3.

본 연구에서는 식물체에 널리 분포하는 indole-3-carbinol (I3C)에 의한 OVCAR-3 인체 난소암세포의 이동성 및 침윤성 억제 가능성과 이와 연관된 기전을 조사하였다. 본 연구의 결과에 의하면 I3C에 의한 OVCAR-3 세포의 증식억제는 세포의 이동성 억제와 연관이 있었으며, 이를 wound healing 및 matrigel invasion assay로 확인 하였다. 아울러 I3C 처리에 의하여 transepithelial electrical resistance가 증가되었으며, cellular paracellular permeability는 감소되었는데, 이는 I3C 처리에 의해 세포 내 치밀결합(tight junctions, TJs)의 tightness가 증가되었음을 의미한다. RT-PCR 및 immunoblotting 결과에 의하면, I3C는 TJs의 구성 성분이면서 paracellular transport의 선택적 투과성을 조절하는 주요 인자인 claudin-3 및 -4의 발현을 유의적으로 억제하였다. 또한 matrix metalloproteinase (MMP)-2 및 -9의 활성이 I3C 처리에 의하여 매우 억제되었는데, 이는 그들의 mRNA 및 단백질 수준에서의 발현 감소와 연관성이 있었다. 따라서 I3C에 의한 OVCAR-3 난소암세포의 침윤성 억제는 TJs 기능의 강화와 MMP 활성의 저하가 주요 인자로 작용함을 알 수 있었다.

Keywords

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