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Production of a Conjugated Fatty Acid by Bifidobacterium breve LMC520 from alpha-Linolenic Acid: Conjugated Linolenic Acid (CLnA)

Authors
Park, Hui GyuCho, Hyung TaekSong, Myoung-ChongKim, Sang BumKwon, Eung GiChoi, Nag JinKim, Young Jun
Issue Date
28-3월-2012
Publisher
AMER CHEMICAL SOC
Keywords
Bifidobacterium breve LMC520; conjugated linolenic acid (CLnA); conjugated linoleic acid (CLA); alpha-linolenic acid; NMR
Citation
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, v.60, no.12, pp.3204 - 3210
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume
60
Number
12
Start Page
3204
End Page
3210
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/108951
DOI
10.1021/jf2041559
ISSN
0021-8561
Abstract
This study was performed to characterize natural CLnA isomer production by Bifidobacterium breve LMC520 of human origin in comparison to conjugated linoleic acid (CLA) production. B. breve LMC520 was found to be highly active in terms of CLnA production, of which the major portion was identified as cis-9,trans-11,cis-15 CLnA isomer by GC-MS and NMR analysis. B. breve LMC520 was incubated for 48 h using MRS medium (containing 0.05% L-cysteine center dot HCl) under different environmental conditions such as atmosphere, pH, and substrate concentration. The high conversion rate of alpha-linolenic acid (alpha-LNA) to CLnA (99%) was retained up to 2 mM alpha-LNA, and the production was proportionally increased nearly 7-fold with 8 mM by the 6 h of incubation under anaerobic conditions at a wide range of pH values (between 5 and 9). When alpha-LNA was compared with linoleic acid (LA) as a substrate for isomerization by B. breve LMC520, the conversion of alpha-LNA was higher than that of LA. These results demonstrated that specific CLnA isomer could be produced through active bacterial conversion at an optimized condition. Because many conjugated octadecatrienoic acids in nature are shown to play many positive roles, the noble isomer found in this study has potential as a functional source.
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