Bifidobacterium breve UCC2003 exopolysaccharide modulates the early life Microbiota by acting as a potential dietary substrate
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Published Version
Supplementary Materials
Date
2020
Authors
Püngel, Deborah
Treveil, Agatha
Dalby, Matthew J.
Caim, Shabhonam
Colquhoun, Ian J.
Booth, Catherine
Ketskemety, Jennifer
Korcsmaros, Tamas
van Sinderen, Douwe
Lawson, Melissa A. E.
Journal Title
Journal ISSN
Volume Title
Publisher
MDPI
Published Version
Abstract
BACKGROUND: Bifidobacterium represents an important early life microbiota member. Specific bifidobacterial components, exopolysaccharides (EPS), positively modulate host responses, with purified EPS also suggested to impact microbe-microbe interactions by acting as a nutrient substrate. Thus, we determined the longitudinal effects of bifidobacterial EPS on microbial communities and metabolite profiles using an infant model colon system. METHODS: Differential gene expression and growth characteristics were determined for each strain; Bifidobacterium breve UCC2003 and corresponding isogenic EPS-deletion mutant (B. breve UCC2003del). Model colon vessels were inoculated with B. breve and microbiome dynamics monitored using 16S rRNA sequencing and metabolomics (NMR). RESULTS: Transcriptomics of EPS mutant vs. B. breve UCC2003 highlighted discrete differential gene expression (e.g., eps biosynthetic cluster), though overall growth dynamics between strains were unaffected. The EPS-positive vessel had significant shifts in microbiome and metabolite profiles until study end (405 h); with increases of Tyzzerella and Faecalibacterium, and short-chain fatty acids, with further correlations between taxa and metabolites which were not observed within the EPS-negative vessel. CONCLUSIONS: These data indicate that B. breve UCC2003 EPS is potentially metabolized by infant microbiota members, leading to differential microbial metabolism and altered metabolite by-products. Overall, these findings may allow development of EPS-specific strategies to promote infant health.
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Keywords
16S rRNA profiling , Bifidobacterium , Cross-feeding , Diet , Early life , Exopolysaccharides , Metabolomics , Model colon
Citation
Püngel, D., Treveil, A., Dalby, M. J., Caim, S., Colquhoun, I. J., Booth, C., Ketskemety, J., Korcsmaros, T., Van Sinderen, D., Lawson, M. A., & Hall, L. J. (2020). 'Bifidobacterium breve ucc2003 exopolysaccharide modulates the early life microbiota by acting as a potential dietary substrate', Nutrients, 12(4), 948 (17pp). doi: 10.3390/nu12040948