Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Global Gene Expression Changes by Several Phytochemicals in Human Colorectal Cancer Cell

인간 대장암 세포주에서 파이토케미칼 처리에 의한 유전자 발현 변화

  • Park, Min-Hee (Department of Biological Sciences, Andong National University) ;
  • Kwak, Eun-Hee (Department of Biological Sciences, Andong National University) ;
  • Sohn, Ho-Yong (Department of Food and Nutrition, Andong National University) ;
  • Eling, Thomas (Laboratory of Molecular Carcinogenesis, National Institute of Environmental Health Sciences, National Institutes of Health) ;
  • Kim, Jong-Sik (Department of Biological Sciences, Andong National University)
  • Received : 2011.07.12
  • Accepted : 2011.09.08
  • Published : 2011.09.30
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Abstract

Phytochemicals, non-nutrient chemicals derived from plants, have been shown to have anti-inflammation, anti-oxidation, and chemopreventive effects. In the current study, we investigated whether five different phytochemicals (resveratrol, genistein, epicatechin gallate, diallyl disulfide, and caffeic acid phenethyl ester) alter cell growth and gene expression in human colorectal cancer HCT116 cells. Using a cell viability assay, we found that each of the phytochemicals tested inhibited HCT116 cell growth in a dose-dependent manner. Additionally, using human oligo DNA microarray analysis, we found that only six genes were commonly up-regulated and seven genes were commonly down-regulated in response to each phytochemical treatment. For the commonly up-regulated genes, the microarray analysis was confirmed by reverse transcription.PCR using gene-specific primers. In addition, NAG-1 protein was up-regulated by all treated phytochemcials. The results of this study may help to enhance our understanding of the general molecular mechanisms of chemoprevention that are mediated by phytochemicals in human colorectal cancer.

파이토케미칼은 식물유래의 비 영양 성분으로서 항염증, 항산화, 및 화학적 암 예방 등의 생리활성을 가지고 있는 물질이다. 본 연구에서, 우리는 다섯 가지의 다른 파이토케미칼(resveratrol, genistein, epicatechin gallate, diallyl disulfide, caffeic acid phenethyl ester)이 대장암 세포주의 성장과 유전자 발현에 미치는 영향을 연구하였다. 세포 생존율 연구결과, 처리한 ECG를 제외한 모든 파이토케미칼에 의해 농도의존적으로 세포생존율이 감소함을 확인하였다. 또한, oligo DNA microarray 실험을 통해 다섯 종류의 파이토케미칼에 의해 공통적으로 증가 되는 유전자 6개와 공통적으로 발현이 감소되는 유전자 7개를 선별하였다. 공통적으로 발현이 증가되는 유전자를 선택하여 RT-PCR 방법을 통해 발현을 증명하였다. 또한, 파이토케미칼에 의한 NAG-1 단백질의 발현 증가도 확인하였다. 이러한 연구결과는 파이토케미칼에 의해 중재되어 지는 화학적 암 예방법의 일반적인 분자 기전을 이해하는데 도움을 줄 것으로 생각된다.

Keywords

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