Bifidobacterium mongoliense genome seems particularly adapted to milk oligosaccharide digestion leading to production of antivirulent metabolites
BACKGROUND: Human milk oligosaccharides (HMO) could promote the growth of bifidobacteria, improving young children's health. In addition, fermentation of carbohydrates by bifidobacteria can result in the production of metabolites presenting an antivirulent activity against intestinal pathogens. Bovine milk oligosaccharides (BMO), structurally similar to HMO, are found at high concentration in cow whey. This is particularly observed for 3'-sialyllactose (3'SL). This study focused on enzymes and transport systems involved in HMO/BMO metabolism contained in B. crudilactis and B. mongoliense genomes, two species from bovine milk origin. The ability of B. mongoliense to grow in media supplemented with whey or 3'SL was assessed. Next, the effects of cell-free spent media (CFSM) were tested against the virulence expression of Escherichia coli O157:H7 and Salmonella enterica serovar Typhimurium.
RESULTS: Due to the presence of genes encoding β-galactosidases, β-hexosaminidases, α-sialidases and α-fucosidases, B. mongoliense presents a genome more sophisticated and more adapted to the digestion of BMO/HMO than B. crudilactis (which contains only β-galactosidases). In addition, HMO/BMO digestion involves genes encoding oligosaccharide transport systems found in B. mongoliense but not in B. crudilactis. B. mongoliense seemed able to grow on media supplemented with whey or 3'SL as main source of carbon (8.3 ± 1.0 and 6.7 ± 0.3 log cfu/mL, respectively). CFSM obtained from whey resulted in a significant under-expression of ler, fliC, luxS, stx1 and qseA genes (- 2.2, - 5.3, - 2.4, - 2.5 and - 4.8, respectively; P < 0.05) of E. coli O157:H7. CFSM from 3'SL resulted in a significant up-regulation of luxS (2.0; P < 0.05) gene and a down-regulation of fliC (- 5.0; P < 0.05) gene. CFSM obtained from whey resulted in significant up-regulations of sopD and hil genes (2.9 and 3.5, respectively; P < 0.05) of S. Typhimurium, while CFSM obtained from 3'SL fermentation down-regulated hil and sopD genes (- 2.7 and - 4.2, respectively; P < 0.05).
CONCLUSION: From enzymes and transporters highlighted in the genome of B. mongoliense and its potential ability to metabolise 3'SL and whey, B. mongoliense seems well able to digest HMO/BMO. The exact nature of the metabolites contained in CFSM has to be identified still. These results suggest that BMO associated with B. mongoliense could be an interesting synbiotic formulation to maintain or restore intestinal health of young children.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2020 |
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| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:20 |
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| Enthalten in: |
BMC microbiology - 20(2020), 1 vom: 07. Mai, Seite 111 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Bondue, Pauline [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 26.05.2021 Date Revised 26.05.2021 published: Electronic Citation Status MEDLINE |
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| doi: |
10.1186/s12866-020-01804-9 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM309642183 |
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| 245 | 1 | 0 | |a Bifidobacterium mongoliense genome seems particularly adapted to milk oligosaccharide digestion leading to production of antivirulent metabolites |
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| 500 | |a published: Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a BACKGROUND: Human milk oligosaccharides (HMO) could promote the growth of bifidobacteria, improving young children's health. In addition, fermentation of carbohydrates by bifidobacteria can result in the production of metabolites presenting an antivirulent activity against intestinal pathogens. Bovine milk oligosaccharides (BMO), structurally similar to HMO, are found at high concentration in cow whey. This is particularly observed for 3'-sialyllactose (3'SL). This study focused on enzymes and transport systems involved in HMO/BMO metabolism contained in B. crudilactis and B. mongoliense genomes, two species from bovine milk origin. The ability of B. mongoliense to grow in media supplemented with whey or 3'SL was assessed. Next, the effects of cell-free spent media (CFSM) were tested against the virulence expression of Escherichia coli O157:H7 and Salmonella enterica serovar Typhimurium | ||
| 520 | |a RESULTS: Due to the presence of genes encoding β-galactosidases, β-hexosaminidases, α-sialidases and α-fucosidases, B. mongoliense presents a genome more sophisticated and more adapted to the digestion of BMO/HMO than B. crudilactis (which contains only β-galactosidases). In addition, HMO/BMO digestion involves genes encoding oligosaccharide transport systems found in B. mongoliense but not in B. crudilactis. B. mongoliense seemed able to grow on media supplemented with whey or 3'SL as main source of carbon (8.3 ± 1.0 and 6.7 ± 0.3 log cfu/mL, respectively). CFSM obtained from whey resulted in a significant under-expression of ler, fliC, luxS, stx1 and qseA genes (- 2.2, - 5.3, - 2.4, - 2.5 and - 4.8, respectively; P < 0.05) of E. coli O157:H7. CFSM from 3'SL resulted in a significant up-regulation of luxS (2.0; P < 0.05) gene and a down-regulation of fliC (- 5.0; P < 0.05) gene. CFSM obtained from whey resulted in significant up-regulations of sopD and hil genes (2.9 and 3.5, respectively; P < 0.05) of S. Typhimurium, while CFSM obtained from 3'SL fermentation down-regulated hil and sopD genes (- 2.7 and - 4.2, respectively; P < 0.05) | ||
| 520 | |a CONCLUSION: From enzymes and transporters highlighted in the genome of B. mongoliense and its potential ability to metabolise 3'SL and whey, B. mongoliense seems well able to digest HMO/BMO. The exact nature of the metabolites contained in CFSM has to be identified still. These results suggest that BMO associated with B. mongoliense could be an interesting synbiotic formulation to maintain or restore intestinal health of young children | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a 3′-sialyllactose | |
| 650 | 4 | |a Antivirulent effect | |
| 650 | 4 | |a Bifidobacterium crudilactis | |
| 650 | 4 | |a Bifidobacterium mongoliense | |
| 650 | 4 | |a Bovine milk oligosaccharide | |
| 650 | 4 | |a Escherichia coli O157:H7 | |
| 650 | 4 | |a Salmonella enterica serovar Typhimurium | |
| 650 | 4 | |a Whey | |
| 650 | 7 | |a 3'-sialyllactose |2 NLM | |
| 650 | 7 | |a Bacterial Proteins |2 NLM | |
| 650 | 7 | |a Culture Media |2 NLM | |
| 650 | 7 | |a Oligosaccharides |2 NLM | |
| 650 | 7 | |a beta-Galactosidase |2 NLM | |
| 650 | 7 | |a EC 3.2.1.23 |2 NLM | |
| 650 | 7 | |a alpha-L-Fucosidase |2 NLM | |
| 650 | 7 | |a EC 3.2.1.51 |2 NLM | |
| 650 | 7 | |a beta-N-Acetylhexosaminidases |2 NLM | |
| 650 | 7 | |a EC 3.2.1.52 |2 NLM | |
| 700 | 1 | |a Milani, Christian |e verfasserin |4 aut | |
| 700 | 1 | |a Arnould, Emilie |e verfasserin |4 aut | |
| 700 | 1 | |a Ventura, Marco |e verfasserin |4 aut | |
| 700 | 1 | |a Daube, Georges |e verfasserin |4 aut | |
| 700 | 1 | |a LaPointe, Gisèle |e verfasserin |4 aut | |
| 700 | 1 | |a Delcenserie, Véronique |e verfasserin |4 aut | |
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