Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Basic Physiological Activities of Bifidobacterium infantis Maeil-K9 and Lactobacillus plantarum KCTC3099 Selected by Anticarcinogenic Activities.

항암 활성능이 우수한 Bifidobacterium infantis Mneil-K9과 Lactobacillus plantarum KCTC3099의 기초 생리활성

  • 김응률 (매일유업(주)중앙연구소) ;
  • 정병문 (매일유업(주)중앙연구소) ;
  • 김지연 (서울대학교 식품공학과) ;
  • 김서영 (서울대학교 식품공학과) ;
  • 정후길 (매일유업(주)중앙연구소) ;
  • 이형주 (서울대학교 식품공학과) ;
  • 전호남 (매일유업(주)중앙연구소)
  • Published : 2003.12.01
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Abstract

This study was conducted to confirm the availability of lactic acid bacteria as probiotics haying inhibitory effects to cancer cell line. Five lactic acid bacteria showing anti-cancer activity were compared by acid tolerance, bile tolerance, antibiotics resistance, milk fermentation, stability, and cell adherence activity to colon epithelial cell. The results obtained are as follows : In acid tolerance, all strains did not have a resistance below pH 3.0 and 3.5 except Lactobacillus plantarum KCTC3099. In antibiotics resistance, Lactococcus lactis and L. plantarum KCTC3099 were resistant to cotrimoxazol (128 mg/1), and Bifidobacterium adolescentis Maeil-K8 and B. infantis Maeil-K9 were resistant to doxycylin and gentamycin (4 mg/1). In case of cell adherence ability to Caco-2 cell, B. infantis Maeil-K9 was found to be superior to others as 3.1%, while the others were less than 0.5%. When the strains were cultured to milk base, viable counts of the strains tested increased more 1 log cycle than inoculation, but acid production was very low except L. plantarum KCTC3099. Also, L. plantarum KCTC3099, B. adolescentis Maeil-K8, and B. infantis Maeil-K9 were stable in fermented milk base during storage. In conclusion, L. plantarum KCTC3099 and B. infantis Maeil-K9 were confirmed to be superior for the availability as probiotics.

항암 활성 유산균이 상용화되기 위해서는 장내 미생물균총의 개선에 의한 발암물질의 생성 억제능과 장내 면역계 활성화에 의한 암세포 증식 억제능 외에도 기초적인 생리활성능을 겸비하여야 한다. 본 연구는 항암 활성능이 우수한 유산균에 대한 기초 생리활성을 비교하므로서 살아있는 균주로서의 이용성을 확인하는데 그 목적이 있다. 암세포 억제율이 60％ 이상인 5균주를 이용하여 내산성, 내담즙성, 항생제 내성, 우유 적용능, 안정성, 정착능을 확인하였으며, 그 결과는 다음과 같다. 내산성은 Lb. plantarum KCTC3099를 제외하고는 pH 3.5 이하에서는 내성이 없었으며, 유산보다는 HCl에 대한 내성이 강한 것으로 나타났다. 항생제 MIC에서 Lc. lactis와 Lb. plantarum KCTC3099는 cotrimoxazol(128 mg/1), B. adolescentis Maeil-K8과 B. infantis Maeil-K9은 doxycylin과 gentamicin(4 mg/1)에서 내성이 높았다. Caco-2 세포에 대한 정착률은 B. infantis Maeil-K9 균주가 3.1％로서 가장 우수하였으며, 나머지 균주들은 0.5％ 이하로 매우 낮았다. 우유 배양능은 모든균주가 1 log cycle 이상의 균수 증가를 보였으나, Lb. plantarum KCTC3099를 제외하고는 산 생성능이 낮게 나타났다. 또한 우유 base에서의 안정성은 Lb. plantarum KCTC3099와 B. adolescentis Maeil-K8 및 B. infantis Maeil-K9이 우수한 것으로 확인되었다. 따라서 Lb. plantarum KCTC3099와 B. infantis Maeil-K9 균주가 항암 활성을 가지는 살아있는 균주로서의 활용성이 우수한 것으로 확인되었다.

Keywords

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