Inhibition effects of extracts and its solvent fractions isolated from Limonium tetragonum on growth of human cancer cells

염생식물 갯질경 [Limonium tetragonum]의 추출물이 암세포성장에 미치는 효과

  • Kong, Chang-Suk (Research Institute of Marine Science and Technology, Korea Maritime University) ;
  • Um, Young-Ran (Division of Marine Environment and Bioscience, Korea Maritime University) ;
  • Lee, Jung-Im (Division of Marine Environment and Bioscience, Korea Maritime University) ;
  • Kim, You-Ah (Division of Marine Environment and Bioscience, Korea Maritime University) ;
  • Lee, Jeom-Sook (Department of Biology, Kusan National University) ;
  • Seo, Young-Wan (Division of Marine Environment and Bioscience, Korea Maritime University)
  • 공창숙 (한국해양대학교 해양과학기술연구소) ;
  • 엄영란 (한국해양대학교 해양환경생명과학부) ;
  • 이정임 (한국해양대학교 해양환경생명과학부) ;
  • 김유아 (한국해양대학교 해양환경생명과학부) ;
  • 이점숙 (군산대학교 생물학과) ;
  • 서영완 (한국해양대학교 해양환경생명과학부)
  • Published : 2008.04.29

Abstract

In this study, crude extracts of the halophyte Limonium tetragonum and their solvent fractions were evaluated on anticancer activity in AGS and HT-29 human cancer cells using MTT assay. Each of the crude extracts (MeOH and $CH_2Cl_2$) of Limonium tetragonum showed a significant inhibitory effect on the growth of human cancer cells. The combined crude extracts of MeOH and $CH_2Cl_2$ were partitioned between $CH_2Cl_2$ and water. The organic layer was further partitioned between 85% aq. MeOH and n-hexane, and then the aqueous layer was fractionated with n-BuOH and $H_2O$, successively. Growth inhibition effects of crude extracts and their solvent fractions from Limonium tetragonum increased in a dose-dependent manner. Among them, 85% aq. MeOH, n-hexane and n-BuOH fractions revealed very good inhibition effects on the growth of human cancer cells. These results suggest that we can isolate active compounds from Limonium tetragonum to show much more strong anticancer activity.

본 연구에서는 염생식물의 한 종류인 갯질경을 이용하여 생리활성물질에 의한 항발암성물질의 생성 및 생체방어물질로서의 유용성을 검토하기 위하여 갯질경의 추출물 및 용매별 분획물에서 AGS와 HT-29 인체암세포에 대한 증식억제효과를 검토하였다. 갯질경의 용매 추출물은 시료 처리 농도 증가에 따라 인체 위암 및 결장암세포의 생존율을 농도 의존적으로 감소시키는 경향을 보였다. 시료의 처리농도 $200\;{\mu}g/ml$에서 methanol과 methylene chloride 추출물은 인체 위암세포에 대하여 각각 66%와 71%의 암세포 증식억제율을, 인체 결장암세포에 대하여서는 각각 60%와 84%의 암세포 증식억제율을 보였다. 이러한 암세포 증식억제효과는 methanol 추출물보다는 methylene chloride 추출물에서 높게 나타났으며, AGS 인체 위암세포에서 보다도 HT-29 인체 결장암세포에서 다소 높은 효과를 나타내었다. 갯질경의 조추출물이 인체 암세포에 대하여 높은 증식억제효과를 나타내었으므로, 이들 추출물의 용매분획물을 이용하여 인체 암세포의 성장에 미치는 영향을 살펴 보았다. 그 결과 85%aq. MeOH 분획층에서 가장 높은 암세포 증식 억제효과를 보였으나, $H_2O$ 분획층에서는 50%이하의 낮은 억제율로 거의 효과를 보이지 않았다. AGS 인체 위암세포의 성장억제효과를 관찰한 결과, $200\;{\mu}g/ml$의 처리 농도에서 85% aq. MeOH, n-hexane 및 n-BuOH의 분획물이 약 80% 이상의 높은 증식 억제효과를 나타내었으며, HT-29 인체 결장암세포에 대하여서는 85%aq. MeOH과 n-hexane의 분획물에서 월등히 높은 증식억제효과가 관찰되었는데, 이 억제효과는 인체 위암세포에서 보다도 높은 저해효과를 보여주었다. 이상의 결과로부터 해양생물 중 염생식물의 한 종류인 갯질경의 높은 항암활성효과와 함께 식용 및 약용으로의 가치가 있는 새로운 생리활성물질의 소재군으로서의 가능성을 확인할 수 있었다.

Keywords

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