Screening and Characterization of Lactobacillus casei MCL Strain Exhibiting Immunomodulation Activity

• 발행기관: 한국축산식품학회
• 저자명: Jae Kyoung Choi Yea Seul Lim Hee Jin Kim Yeong Ho Hong Buom Yong Ryu Geun Bae Kim
• 간행물 정보: 『Food Science of Animal Resources』Korean Journal for Food Science of Animal Resources 제32권 제5호, 635~643쪽, 전체 9쪽
• 주제분류: 농수해양 > 식품과학
• 파일형태: PDF
• 발행일자: 2012.10.31

영문 초록

As an appraisal for the application of a new starter culture, more than 200 lactic acid bacteria strains were isolated from raw milk and healthy human feces. The strains showing excellent growth and acid production ability in 10% skim milk media were selected and identified as Lactobacillus casei based on the results of their API carbohydrate fermentation patterns, as well as 16S rDNA sequence analysis. To assess the effect of L. casei strains on irritable bowel disease (IBD), the inhibitory effect of the selected strains against the nitric oxide (NO) production of lipopolysaccharide (LPS)-stimulated RAW 264.7 cells was measured. Among the tested L. casei strains, L. casei MCL was observed to have the greatest NO inhibitory activity. Additionally, L. casei MCL was found to inhibit mRNA expression of pro-inflammatory cytokines (interleukin-1β, IL-6, TNF-α), as well as cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) involved in pathophysiologic processes such as inflammation. The mRNA expression of anti-inflammatory cytokines, including IL- 10 and transforming growth factor-β (TGF-β) of L. casei MCL, was confirmed using quantitative real-time PCR. In conclusion, L. casei MCL showed decreases in the expression of pro-inflammatory cytokines and up-regulated expression of the anti-inflammatory cytokine.

키워드

immunomodulating Lactobacillus casei probiotics cytokine