Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Antiproliferative Effect of Mistletoe Extract Added Kimchi in Human Lung Carcinoma A549 Cells

겨우살이 물추출물 첨가 김치의 A549 인체 폐암 세포 증식저해 효과

  • Kil, Jung-Ha (Department of Food Science and Nutrition, Pusan National University)
  • 길정하 (부산대학교 식품영양학과)
  • Received : 2017.11.14
  • Accepted : 2017.11.24
  • Published : 2017.12.30
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Abstract

The purpose of this study aimed at examining the antiproliferative effect of kimchi (kimchi B) adding mistletoe extract known as an anticancer function to improve the functions of kimchi. The study investigated the antiproliferative effect through hemocytometer counts and MTT assay, apoptosis induction through DAPI staining, and mRNA expression through RT-PCR using human lung carcinoma A549 cells. The standardized kimchi (Kimchi A) was used as a control group. As a result of hemocytometer counts and the MTT assay, it was found that kimchi samples inhibited the growth of A549 cells in a concentration-dependent manner. Kimchi B induced apoptosis in A549 cells through DAPI staining. The apoptosis induced by kimchi B was associated with the increase in the expression of pro-apoptotic Bax and with the decrease in the expression of anti-apoptotic Bcl-2 and Bcl-xL. Also, kimchi B influenced the increase in the expression of p21 mRNA, but did not have the effect on the expression of p53 mRNA. In conclusion, the antiproliferative effect of kimchi B was due to apoptosis induced by increasing Bax and decreasing Bcl-2, and increasing p21. The findings will be utilized to develop kimchi with the improved function for the patients having cancer.

김치는 한국에서 가장 인기 있는 발효식품이며, 여러 연구에서 암예방, 항비만, 항염증 등의 활성을 가지는 건강기능성 식품으로 보고되고 있다. 본 실험에서는 김치의 기능성을 높이기 위하여 항암기능성이 알려진 겨우살이 추출물을 첨가하여 개발한 암환자용 김치(kimchi B)의 암세포 증식억제능 및 그 기전에 대하여 검토하였다. 인체 폐암 A549세포를 이용하여 증식저해 효과와 apoptosis 유도 및 관련된 mRNA 유전자 발현에 미치는 영향을 관찰하였으며, 대조군으로는 표준화김치(kimchi A)를 사용하였다. A549 인체 폐암 세포를 이용한 성장 저해시험에서 MTT 방법과 hemocytometer를 이용하여 암세포 수를 개수한 결과, 김치를 첨가한 군에서 농도 의존적으로 증식억제 효과가 나타났으며, 특히 kimchi B를 첨가한 군에서 더 높은 증식억제 효과를 확인할 수 있었다. DAPI 염색을 통해 암세포 핵의 형태적 특징을 조사한 결과 kimchi B를 첨가한 군에서 DNA단편이 발견되어, A549 인체 폐암세포의 증식억제효과는 apoptosis에 의한 것으로 관찰되었다. Apoptosis의 기전을 알아보기 위하여 Bcl-2 family (Bax, Bcl-2, Bcl-xL) 발현과 p53, p21 발현을 측정한 결과, kimchi B를 첨가한 군에서 Bax 유전자는 증가하고 Bcl-2 유전자 발현이 감소하여, 이들 유전자 발현과 관련되어 apoptosis가 유도되었음을 확인할 수 있었으며, 이들 유전자들의 발현은 p21 발현 증가에 의한 것으로 보아 kimchi B를 처리한 A549인체 폐암세포는 p53 비의존적인 p21 발현증가에 의해 암세포 증식저해 효과를 나타낸 것으로 사료된다. 이 연구를 바탕으로 암환자들을 위한 기능성이 증진된 김치 개발에 활용이 가능할 것으로 기대된다.

Keywords

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