Korean Journal of Food Science and Technology (한국식품과학회지)

Korean Society of Food Science and Technology (한국식품과학회)
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Anti-hypertensive Activities of Lactobacillus Isolated from Kimchi

김치에서 분리한 유산균의 항고혈압 활성

  • Yu, Mi-Hee (Department of Food Science and Technology, Keimyung University) ;
  • Im, Hyo-Gwon (Department of Food Science and Technology, Keimyung University) ;
  • Im, Nam-Kyung (Department of Food Science and Technology, Keimyung University) ;
  • Hwang, Eun-Young (Department of Food Science and Technology, Keimyung University) ;
  • Choi, Jun-Hyeok (Department of Food Science and Technology, Keimyung University) ;
  • Lee, Eun-Ju (Bio Research Institute, NUC Electronics Co. Ltd.) ;
  • Kim, Jong-Boo (Bio Research Institute, NUC Electronics Co. Ltd.) ;
  • Lee, In-Seon (Department of Food Science and Technology, Keimyung University) ;
  • Seo, Hwa-Jeong (Department of Food Science and Technology, Keimyung University)
  • Published : 2009.08.31
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Abstract

This study was conducted to evaluate the anti-hypertensive effect of Lactobacillus sp. isolated from Kimchi by examining its effects on renal angiotensin-converting enzyme (ACE) inhibitory activity, lipid components and blood pressure using the spontaneously hypertensive rat (SHR) system. Most Lactobacillus sp. extracts (lysozyme, sonication and ethyl acetate extracts) showed higher capacities for the inhibition of ACE activity than those of cultured media. Particularly, LG 7, 8 and 42 of Lactobacillus sp. showed the strongest inhibitory activity among the Lactobacillus sp. extracts. The concentrations of total cholesterol and triglycerides in the serum were lower in the Lactobacillus sp. administration groups than in the control group, but these differences were not significant. The HDL-cholesterol concentrations of the LG 42 administration groups (IX, X) were significantly higher than that of the control group. At 4 weeks, the systolic blood pressure (SBP) in the LG 42 Lactobacillus sp. ($1{\times}10^9$ cfu/mL) group (XI) was about 27% lower than that of the control group (V). No adverse effects were observed on the liver and there was no difference in the aspartate aminotransferase (AST) and alanine aminotransferase (ALT) values among groups. The results of this study suggest that long term consumption of LG 42 Lactobacillus sp. may be beneficial to the prevention of high blood pressure.

본 연구에서는 김치에서 분리한 유산균이 ACE 억제효과와 본태성 고혈압쥐의 혈압에 미치는 영향을 조사하였다. 김치에서 분리한 유산균의 배양액 및 lysozyme법, sonication법, solvent extract법으로 균체를 추출하여 ACE 억제효과를 살펴본 결과, 배양액 보다는 균체를 이용하여 추출한 추출물에서 공시균주에 비해 ACE 억제효과가 높은 것으로 확인되었다. 균체 추출시료 중 LG 7, 8, 42가 전반적으로 높은 ACE 억제효과를 나타내어 이들의 균체를 본태성 고혈압쥐(SHR)에게 4주간 투여한 결과, WKY 대조군(I)이 4주간 81 g 정도의 체중 증가를 보인 반면, SHR 대조군(V)은 52 g 정도의 체중 증가를 보여 정상혈압 쥐에 비해 고혈압 쥐의 체중의 증가가 낮은 것으로 나타났으며, 유산균의 장기투여가 고혈압 쥐의 체중 및 장기무게에 유의적인 영향을 주지 않았다. 혈청 중 총 콜레스테롤 농도와 중성지질 농도는 SHR 대조군(V)에 비해 유산균 투여군(X, XI)에서 약간 감소하는 경향을 보였으나 유의적인 차는 아니었으며, SHR에 LG 42 유산균을 섭취시킴으로서 총 콜레스테롤과 중성지질의 농도는 감소하고, HDL 콜레스테롤의 농도는 증가하는 것으로 나타났다. 유산균 투여 후 4주째의 최종 혈압을 비교한 결과, LG 42를 투여함에 따라 기준혈압에 비해 농도 의존적($1{\times}10^7$, $1{\times}10^9$ cfu/mL)으로 각각 12, 27% 감소하였다.

Keywords

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