Physiological activity of E. coli engineered to produce butyric acid

Title
Physiological activity of E. coli engineered to produce butyric acid
Authors
최재영함정엽박영태김태정이회석연영주최수인김나영김연란석영재
Keywords
E. coli Nissle1917; butyric acid; butyryl-CoA dehydrogenase (BCD); glucose; DSS-colitis model; anti-inflammatory
Issue Date
2021-03
Publisher
Microbial biotechnology
Citation
VOL 0, NO 0-12
Abstract
Faecalibacterium prausnitzii (F. prausnitzii) is one of the most abundant bacteria in the human intestine, with its anti­inflammatory effects establishing it as a major effector in human intestinal health. However, its extreme sensitivity to oxygen makes its cultivation and physiological study difficult. F. prausnitzii produces butyric acid, which is beneficial to human gut health. Butyric acid is a short­chain fatty acid (SCFA) produced by the fermentation of carbohydrates, such as dietary fibre in the large bowel. The genes encoding butyryl­CoA dehydrogenase (BCD) and butyryl­CoA:acetate CoA transferase (BUT) in F. prausnitzii were cloned and expressed in E. coli to determine the effect of butyric acid production on intestinal health using DSS­induced colitis model mice. The results from the E. coli Nissle 1917 strain, expressing BCD, BUT, or both, showed that BCD was essential, while BUT was dispensable for producing butyric acid. The effects of different carbon sources, such as glucose, N­acetylglucosamine (NAG), N­acetylgalactosamine (NAGA), and inulin, were compared with results showing that the optimal carbon sources for butyric acid production were NAG, a major component of mucin in the human intestine, and glucose. Furthermore, the anti­inflammatory effects of butyric acid production were tested by administering these strains to DSS­induced colitis model mice. The oral administration of the E. coli Nissle 1917 strain, carrying the expression vector for BCD and BUT (EcN­BCD­BUT), was found to prevent DSS­induced damage. Introduction of the BCD expression vector into E. coli Nissle 1917 led to increased butyric acid production, which improved the strain’s health­beneficial effects.
URI
http://pubs.kist.re.kr/handle/201004/72966
ISSN
1751-7915
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KIST Publication > Article
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