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Loayza JJ, Kang S, Schooth L, Teh JJ, de Klerk A, Noon EK, Zhang J, Hu J, Hamilton AL, Wilson-O’Brien A, Trakman GL, Lin W, Ching J, Or L, Sung J, Yu J, Ng S, Kamm M, Morrison M. Effect of food additives on key bacterial taxa and the mucosa-associated microbiota in Crohn's disease. The ENIGMA study. Gut Microbes 2023; 15:2172670. [PMID: 36852457 PMCID: PMC9980662 DOI: 10.1080/19490976.2023.2172670] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/01/2023] Open
Abstract
Food additives have been linked to the pro-inflammatory microbial dysbiosis associated with Crohn's disease (CD) but the underlying ecological dynamics are unknown. Here, we examine how selection of food additives affects the growth of multiple strains of a key beneficial bacterium (Faecalibacterium prausnitzii), axenic clinical isolates of proinflammatory bacteria from CD patients (Proteus, Morganella, and Klebsiella spp.), and the consortia of mucosa-associated microbiota recovered from multiple Crohn's disease patients. Bacterial growth of the axenic isolates was evaluated using a habitat-simulating medium supplemented with either sodium sulfite, aluminum silicate, carrageenan, carboxymethylcellulose, polysorbate 80, saccharin, sucralose, or aspartame, intended to approximate concentrations found in food. The microbial consortia recovered from post-operative CD patient mucosal biopsy samples were challenged with either carboxymethylcellulose and/or polysorbate 80, and the bacterial communities compared to unchallenged consortia by 16S rRNA gene amplicon profiling. Growth of all F. prausnitzii strains was arrested when either sodium sulfite or polysorbate 80 was added to cultures at baseline or mid-exponential phase of growth, and the inhibitory effects on the Gram-negative bacteria by sodium sulfite were conditional on oxygen availability. The effects from polysorbate 80, saccharin, carrageenan, and/or carboxymethylcellulose on these bacteria were strain-specific. In addition to their direct effects on bacterial growth, polysorbate 80 and/or carboxymethylcellulose can drive profound changes in the CD mucosa-associated microbiota via niche expansion of Proteus and/or Veillonellaceae - both implicated in early Crohn's disease recurrence. These studies on the interaction of food additives with the enteric microbiota provide a basis for dietary management in Crohn's disease.
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Affiliation(s)
- J.J. Jimenez Loayza
- Frazer Institute, Faculty of Medicine, University of Queensland, Brisbane, Australia
| | - S. Kang
- Frazer Institute, Faculty of Medicine, University of Queensland, Brisbane, Australia
| | - L. Schooth
- Frazer Institute, Faculty of Medicine, University of Queensland, Brisbane, Australia
| | - J. J. Teh
- Frazer Institute, Faculty of Medicine, University of Queensland, Brisbane, Australia
| | - A. de Klerk
- Frazer Institute, Faculty of Medicine, University of Queensland, Brisbane, Australia
| | - E. K. Noon
- Frazer Institute, Faculty of Medicine, University of Queensland, Brisbane, Australia
| | - J. Zhang
- Department of Medicine and Therapeutics, the Chinese University of Hong Kong, Hong Kong, China,State Key Laboratory of Digestive Diseases, Li Ka Shing Institute of Health Science, The Chinese University of Hong Kong, Hong Kong, China,Microbiota I-Center (Magic), Hong Kong, China
| | - J. Hu
- Department of Medicine and Therapeutics, the Chinese University of Hong Kong, Hong Kong, China,State Key Laboratory of Digestive Diseases, Li Ka Shing Institute of Health Science, The Chinese University of Hong Kong, Hong Kong, China,Microbiota I-Center (Magic), Hong Kong, China
| | - A. L. Hamilton
- Department of Gastroenterology, St Vincent’s Hospital, Melbourne, Australia,Department of Medicine, the University of Melbourne, Melbourne, Australia
| | - A. Wilson-O’Brien
- Department of Gastroenterology, St Vincent’s Hospital, Melbourne, Australia,Department of Medicine, the University of Melbourne, Melbourne, Australia
| | - G. L. Trakman
- Department of Gastroenterology, St Vincent’s Hospital, Melbourne, Australia,Department of Medicine, the University of Melbourne, Melbourne, Australia
| | - W. Lin
- Microbiota I-Center (Magic), Hong Kong, China
| | - J. Ching
- Department of Medicine and Therapeutics, the Chinese University of Hong Kong, Hong Kong, China,State Key Laboratory of Digestive Diseases, Li Ka Shing Institute of Health Science, The Chinese University of Hong Kong, Hong Kong, China,Microbiota I-Center (Magic), Hong Kong, China
| | - L. Or
- Department of Medicine and Therapeutics, the Chinese University of Hong Kong, Hong Kong, China,State Key Laboratory of Digestive Diseases, Li Ka Shing Institute of Health Science, The Chinese University of Hong Kong, Hong Kong, China
| | - J.J.Y. Sung
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | - J. Yu
- Department of Medicine and Therapeutics, the Chinese University of Hong Kong, Hong Kong, China,State Key Laboratory of Digestive Diseases, Li Ka Shing Institute of Health Science, The Chinese University of Hong Kong, Hong Kong, China
| | - S.C. Ng
- Department of Medicine and Therapeutics, the Chinese University of Hong Kong, Hong Kong, China,State Key Laboratory of Digestive Diseases, Li Ka Shing Institute of Health Science, The Chinese University of Hong Kong, Hong Kong, China,Microbiota I-Center (Magic), Hong Kong, China,Centre for Gut Microbiota Research, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - M.A. Kamm
- Department of Gastroenterology, St Vincent’s Hospital, Melbourne, Australia,Department of Medicine, the University of Melbourne, Melbourne, Australia
| | - M. Morrison
- Frazer Institute, Faculty of Medicine, University of Queensland, Brisbane, Australia,CONTACT M. Morrison Mark Morrison Frazer Institute, Faculty of Medicine, University of Queensland Woolloongabba, Australia
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