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Conjugated Linoleic Acid (CLA)가 인체 대장암 세포주에서 Matrix Metalloproteinase (MMP) 활성과 세포이동성에 미치는 영향
Effects of Conjugated Linoleic Acid (CLA) on Matrix Metalloproteinase (MMP) Activity and Cell Motility in Human Colon Cancer Cell Lines

설소미   (단국대학교 식품영양학과UU0000336  ); 방명희   (단국대학교 식품영양학과UU0000336  ); 최옥숙   (단국대학교 식품영양학과UU0000336  ); 윤정한   (한림대학교 생명과학부 식품영양학전공UU0001493  ); 김우경   (단국대학교 식품영양학과UU0000336  );
  • 초록

    Conjugated linoleic acid (CLA) consists of several geometric isomers of linoleic acid. CLA is found in foods derived from ruminants and exhibits strong anticarcinogenic effects in a variety of animal models. Matrix metalloproteinases (MMPs) play a key role in cancer progression. Specifically, MMP-2 and -9, which hydrolyze the basal membrane type IV collagen, are involved in the initial breakdown of collagen and basement membrane components during tumor growth and invasion. However, the effects of CLA on cancer cell motility and MMP expression and activity are not currently well known. Therefore, the present study examined whether CLA reduces the activity of MMP and cell motility in SW480 and SW620 cells, the human colon cancer cell lines. Gelatin zymography and Western blot analysis revealed that phorbol 12-myristate 13-acetate (PMA) induced the activity and protein expression of Mr 92,000 MMP-9 in both cell lines. To examine whether CLA inhibits the MMP activity, cells were incubated with 100 ngfmL PMA in the presence of various concentrations of CLA. PMA-induced MMP-9 activity was decreased by 20 $\mu$ M CLA in SW480 cells, and by 10 $\mu$ M and 20 $\mu$ M CLA in SW620 cells. Results from the Hoyden chamber assay showed that cell motility was increased by PMA and that PMA-induced cell motility was significantly decreased by 20 $\mu$ M CLA in SW480 cells. These results indicate that CLA may reduce the motility and MMP activity in human colon cancer cells.


  • 주제어

    conjugated linoleic acid (CLA) .   matrix metalloproteinase (MMP) .   cell motility .   zymography .   colon cancer cells.  

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