Park, Young-Tae Kim, Taejung Ham, Jungyeob Choi, Jaeyoung Lee, Hoe-Suk Yeon, Young Joo Choi, Soo In Kim, Nayoung Kim, Yeon-Ran Seok, Yeong-Jae 2024-01-19T12:33:13Z 2024-01-19T12:33:13Z 2021-09-05 2022-03 1751-7907 https://pubs.kist.re.kr/handle/201004/115629 Faecalibacterium prausnitzii (F. prausnitzii) is one of the most abundant bacteria in the human intestine, with its anti-inflammatory 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 short-chain fatty acid (SCFA) produced by the fermentation of carbohydrates, such as dietary fibre in the large bowel. The genes encoding butyryl-CoA dehydrogenase (BCD) and butyryl-CoA: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 DSS-induced 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, N-acetylglucosamine (NAG), N-acetylgalactosamine (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 anti-inflammatory effects of butyric acid production were tested by administering these strains to DSS-induced colitis model mice. The oral administration of the E. coli Nissle 1917 strain, carrying the expression vector for BCD and BUT (EcN-BCD-BUT), was found to prevent DSS-induced damage. Introduction of the BCD expression vector into E. coli Nissle 1917 led to increased butyric acid production, which improved the strain's health-beneficial effects. English Society for Applied Microbiology | Wiley Physiological activity of E. coli engineered to produce butyric acid Article 10.1111/1751-7915.13795 1 Microbial Biotechnology, v.15, no.3, pp.832 - 843 Microbial Biotechnology 15 3 832 843 Y scie 000629662500001 2-s2.0-85102655904 Biotechnology & Applied Microbiology Microbiology Biotechnology & Applied Microbiology Microbiology Article; Early Access E. coli Nissle1917 butyric acid butyryl-CoA dehydrogenase (BCD) glucose DSS-colitis model anti-inflammatory