Journal of Nutrition and Health

The Korean Nutrition Society (한국영양학회)
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Indol-3-Carbinol Regulated Tight Junction Permeability and Associated-Protein Level and Suppressed Cell Invasion in Human Colon Cancer Cell Line, HT-29

인돌 (Indol-3-Carbinol)이 인체대장암세포 HT-29 세포의 투과성 밀착결합조절과 세포 침윤성 억제에 미치는 영향

  • Kim, Sung-Ok (Department of Pharmaceutical Science, University of Maryland, School of Pharmacy) ;
  • Choi, Yung-Hyun (Department of Biochemistry, Dongeui University, College of Oriental Medicine) ;
  • Choe, Won-Kyung (Department of Food and Nutrition Gimcheon College)
  • 김성옥 (메릴랜드대학교 약학대학 제약학교실) ;
  • 최영현 (동의대학교 한의과대학 생화학교실) ;
  • 최원경 (김천대학 식품영양과)
  • Published : 2008.01.31
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Abstract

To determine whether indol-3-carbinol (BC, $C_9H_9NO$), an autolysis product of a glucosinolate and a glucobrassicin in vegetables, regulated tight junction proteins (TJ) and suppressed cell invasion in colon cancer cells, this experiment was performed. Our results indicate that I3C inhibit cell growth of HT-29 cells in a dose (0, 50, $100{\mu}M$) and time (0, 24 and 48h) dependent manner. Using the wound healing and matrigel invasion study, respectively, BC inhibits the cell motility and invasion of the ovarian cancer cell line. The TEER values were increased in HT-29 cells grown in transwells treated with BC, reversely, paracellular permeability was decreased in those of condition. Claudin-1, claudin-5, ZO-1 and occuldin have been shown to be positively expressed in HT-29 coloncancer cells. I3C occurs concurrently with a significant decrease in the levels of those of proteins in HT-29 cells. But E-cadherin level in the HT-29 was increased by I3C. The reduction of claudin-1 and claudin-5 protein levels occurred post-transcriptionaly since their mRNA levels are no difference by I3C. Therefore, our results suggest that I3C may be expected to inhibit cancer metastasis and invasion by tighten the cell junction and restoring tight junction in colon cancer cell line, HT-29.

본 실험은 인돌의 인체 대장암세포의 경과 및 전이억제와 TJ 활성 조절에 미치는 영향을 알아보기 위해 실험하였다. 인돌은 십자화 야채류인 양배추, 컬리플라워, 브로클리 등에 존재하는 glucosinolate, glucobrassicin의 대사산물 이다. 본 연구의 결과는 인돌이 대장암 세포 HT-29에서 농도 의존적으로 세포증식 저해를 나타내었다. 상처회복 실험을 통한 세포이동성과 세포 침윤성 실험결과 인돌이 암세포의 이동과 침윤성을 억제하였고 투과성상피세포의 전기적 저항성 측정치는 인돌 처리 세포에서 증가하였다. HT-29 세포에서 과발현을 나타내는 밀착결합 단백질인 claudin-1, claudin-5 발현은 인돌 처리로 유전자의 전사수준과 단백질 수준에서 유의적인 감소를 나타내었다. 이상의 결과에서 인돌이 HT-29 세포의 밀착결합과 그 구성 단백질 중 claudin 발현 현상을 회복시키므로 암 경과와 전이 억제를 나타내었다. 결론적으로, 천연 항암화합물인 인돌은 대장암 세포 HT-29에서 밀착결합 단백질인 claudin-1, -5을 억제하여 밀착결합을 활성화하므로 암 진행과 전이를 억제할 수 있는 인돌에 의한 새로운 기전을 보고합니다.

Keywords

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