Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Fermentation Properties of Young Radish Kimchi Prepared Using Young Radish Cultivated in the Soil Containing Sulfur and It's Inhibitory Effect on the Growth of AGS Human Gastric Adenocarcinoma Cells

유황처리 열무로 제조한 열무김치의 특성과 인체 위암세포의 성장억제효과

  • Kong, Chang-Suk (Dept. of Fond Science and Nutrition and Kimchi Research Institute, Pusan National University) ;
  • Bak, Soon-Sun (Dept. of Fond Science and Nutrition and Kimchi Research Institute, Pusan National University) ;
  • Rhee, Sook-Hee (Dept. of Fond Science and Nutrition and Kimchi Research Institute, Pusan National University) ;
  • Rho, Chi-Woong (Research Center for Exportable Agricultural Crops (RCEC), Gyeongsangnam-do Agricultural Research & Extension Services) ;
  • Kim, Nak-Ku (Research Center for Exportable Agricultural Crops (RCEC), Gyeongsangnam-do Agricultural Research & Extension Services) ;
  • Choi, Keyng-Lag (Research Center for Exportable Agricultural Crops (RCEC), Gyeongsangnam-do Agricultural Research & Extension Services) ;
  • Park, Kun-Young (Dept. of Fond Science and Nutrition and Kimchi Research Institute, Pusan National University)
  • 공창숙 (부산대학교 식품영양학과 및 김치연구소) ;
  • 박순선 (부산대학교 식품영양학과 및 김치연구소) ;
  • 이숙희 (부산대학교 식품영양학과 및 김치연구소) ;
  • 노치웅 (경상남도농업기술원 수출농산물연구소) ;
  • 김낙구 (경상남도농업기술원 수출농산물연구소) ;
  • 최경락 (경상남도농업기술원 수출농산물연구소) ;
  • 박건영 (부산대학교 식품영양학과 및 김치연구소)
  • Published : 2006.02.01
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Abstract

Young radishes (YR, yeolmu in Korean) were cultivated in the soil with and without sulfur. YR-Control (without sulfur) was grown in the normal soil. YR were grown in the soil with $1,818\;g/m^3$ sulfur (YR-A) and $1,818\;g/m^3$ sulfur added lime mortar (YR-B) on it, respectively. Also, we prepared YR kimchis using YR-Control, YR-A and YR-B. The kimchis were fermented at $5^{\circ}C$ for 8 weeks. The growth inhibitory effects of AGS human gastric adenocarcinoma cells of the YR samples and kimchis were investigated. YR kimchis after $4\~5$ weeks at $5^{\circ}C$ showed higher acidity of $0.88\~1.20\%$ with pH $4.3\~4.5$ and the YR kimchis kept approximately pH 4.0 until 8 weeks. The kimchi A and B using YR-A and YR-B showed faster fermentation time, higher level of Leuconostoc sp. and lower level of Lactobacillus sp. during the fermentation, comparing to the control kimchi using YR-Control. Juices from YR-A and YR-B showed higher growth inhibitory effects of AGS human gastric adenocarcinoma cells than the juice from YR-Control at the same concentration. The growth inhibitory effect of YR-A was similar to that of the YR-B. The kimchi A and B juices also exhibited higher inhibitory effects $(74\%)$ on the growth of AGS human gastric adenocarcinoma cells than that of the control kimchi $(57\%)$ at the higher concentration of $20{\mu}L/assay$. Methanol extracts from the YR-kimchis also led to the similar results to the results of the juices. These results suggested that preparing of kimchi using differently cultivated YR especially in the soil with sulfur, which can help to synthesize sulfur-containing compounds, could increase the growth inhibitory effects of AGS human gastric adenocarcinoma cells.

유황처리 토양에서 재배한 열무 YR-A와 유황처리 후 복토를 덮어 재배한 열무 YR-B와 이 열무로 김치를 담근김치 A와 김치 B의 pH및 산도와 AGS 인체 위암세포의 성장억제효과에 미치는 영향을 관찰하였다. YR-A로 담근 열무김치 A와 YR-B로 담근 김치 B는 $4\~5$주일째에 적숙기의 pH에 도달하였으며, 이 때 산도는 $0.88\~1.20\%$의 높은 값을 나타내었다. 열무김치 A와 B는 발효가 더욱 진행되어 $6\~8$주일째가 되어도 pH는 4.0이 하로 감소하지 않고 저장성이 길어지는 경향을 나타내었다. 유황처리한 김치 A와 다시 복토를 한 김 치 B는 일반 토양에서 재배한 대조군 김치에 비해 다소 빠른 시일에 적숙기에 도달하였다. 발효초기에는 김치 A가 대조군 김치보다 높은 Leuconostoc속 젖산균 함량을 나타내었으나, Lactobacillus속 젖산균수는 낮은 함량을 나타내었다. 암세포 성장억제효과의 경우, 유황처리 열무 YR-A 즙액 과 VR-B 즙액은 일반토양에서 재배한 YR-Control 즙액에 비해 유의적으로 $70\%$의 높은 암세포 성장억제효과를 나타내었으며, YR-A와 YR-B는 유의적 차이가 없었다. 대조군 김치, 김치 A와 김치 B의 각 즙액은 첨가 농도 $10{\mu}L/assay$에서는 암세포 성장억제효과가 거의 나타나지 않았으나, 첨가 농도 $20{\mu}L/assay$에서 는 약 $74\%$의 AGS 위 암세포에 대한 성장억제효과가 있었으며 이 결과는 열무의 즙액시료 YR-A와 YR-B에서와 비슷한 효과를 나타내는 것으로 보아 열무김치의 발효과정에서는 그 효과가 거의 나타나지 않았음을 알 수 있었다. 열무김치의 메탄올추출물을 이용하여 암세포의 성장억제효과를 관찰한 결과에서도 거의 비슷한 경향을 나타내었다. 따라서 열무 재배시 토양에의 유황처리방법은 열무김치의 발효과정 및 적숙기에서 시원한 맛을 증가시키고 신맛을 감소시켜 유황처리로 재배한 열무김치가 맛 부분에서 다소 우수하다고 할 수 있으나, 유황처리한 열무 YR-A와 다시 복토를 한 열무 YR-B의 산도와 맛에는 별로 차이가 없었다. 또 유황처리토양에서 재배된 열무와 이 열무로 담근 김치즙액의 AGS 암세포 성장 저지효과는 거의 비슷한 수준이었으며, 유황을 첨가하여 재배한 열무의 경우 대조군에 비해 그 효과가 증진되었다. 이 결과에 의하여 유황을 첨가하여 재배한 열무의 암세포의 성장을 저지하는 활성 성분의 증가가 예상되어진다. 본 연구결과로부터 유황처리 열무의 기능성 식품재료로서의 개발가능성을 기대할 수 있으리라 생각된다.

Keywords

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