Microbially-produced folate forms support the growth of Roseburia intestinalis but not its competitive fitness in fecal batch fermentations.
F-THF
FFA
Fecal fermentations
Folic acid
M-THF
Prototrophs
THF
Vitamin B9
Journal
BMC microbiology
ISSN: 1471-2180
Titre abrégé: BMC Microbiol
Pays: England
ID NLM: 100966981
Informations de publication
Date de publication:
28 Sep 2024
28 Sep 2024
Historique:
received:
23
05
2024
accepted:
17
09
2024
medline:
29
9
2024
pubmed:
29
9
2024
entrez:
28
9
2024
Statut:
epublish
Résumé
Folate (vitamin B9) occurs naturally mainly as tetrahydrofolate (THF), methyl-tetrahydrofolate (M-THF), and formyl-tetrahydrofolate (F-THF), and as dietary synthetic form (folic acid). While folate auxotrophy and prototrophy are known for several gut microbes, the specific folate forms produced by gut prototrophs and their impact on gut auxotrophs and microbiota remain unexplored. Here, we quantified by UHPLC-FL/UV folate produced by six predicted gut prototrophs (Marvinbryantia formatexigens DSM 14469, Blautia hydrogenotrophica 10507 Our results confirmed the production of folate by all six gut strains, in the range from 15.3 ng/ml to 205.4 ng/ml. Different folate forms were detected, with THF ranging from 12.8 to 41.4 ng/ml and 5-MTHF ranging from 0.2 to 113.3 ng/ml, and being detected in all strains. Natural folate forms, in contrast to folic acid, promoted the growth and metabolism of the auxotroph R. intestinalis L1-82, with dose-dependent effects. During fecal batch fermentations, folate forms at both levels had no detectable effect on total bacteria concentration, on gut community composition and metabolic activity and on Roseburia spp. abundance, compared to the control without folate addition. Our study demonstrates for the first time in vitro the production of different natural folate forms by predicted gut prototrophs and the stimulation on the growth of the folate auxotrophic butyrate-producing R. intestinalis L1-82. Surprisingly, folate did not impact fecal fermentations. Our data suggest that the dietary folate forms at the tested levels may only have limited effects, if any, on the human gut microbiota in vivo.
Sections du résumé
BACKGROUND
BACKGROUND
Folate (vitamin B9) occurs naturally mainly as tetrahydrofolate (THF), methyl-tetrahydrofolate (M-THF), and formyl-tetrahydrofolate (F-THF), and as dietary synthetic form (folic acid). While folate auxotrophy and prototrophy are known for several gut microbes, the specific folate forms produced by gut prototrophs and their impact on gut auxotrophs and microbiota remain unexplored.
METHODS
METHODS
Here, we quantified by UHPLC-FL/UV folate produced by six predicted gut prototrophs (Marvinbryantia formatexigens DSM 14469, Blautia hydrogenotrophica 10507
RESULTS
RESULTS
Our results confirmed the production of folate by all six gut strains, in the range from 15.3 ng/ml to 205.4 ng/ml. Different folate forms were detected, with THF ranging from 12.8 to 41.4 ng/ml and 5-MTHF ranging from 0.2 to 113.3 ng/ml, and being detected in all strains. Natural folate forms, in contrast to folic acid, promoted the growth and metabolism of the auxotroph R. intestinalis L1-82, with dose-dependent effects. During fecal batch fermentations, folate forms at both levels had no detectable effect on total bacteria concentration, on gut community composition and metabolic activity and on Roseburia spp. abundance, compared to the control without folate addition.
CONCLUSIONS
CONCLUSIONS
Our study demonstrates for the first time in vitro the production of different natural folate forms by predicted gut prototrophs and the stimulation on the growth of the folate auxotrophic butyrate-producing R. intestinalis L1-82. Surprisingly, folate did not impact fecal fermentations. Our data suggest that the dietary folate forms at the tested levels may only have limited effects, if any, on the human gut microbiota in vivo.
Identifiants
pubmed: 39342101
doi: 10.1186/s12866-024-03528-6
pii: 10.1186/s12866-024-03528-6
doi:
Substances chimiques
Folic Acid
935E97BOY8
Tetrahydrofolates
0
5,6,7,8-tetrahydrofolic acid
43ZWB253H4
5-methyltetrahydrofolate
TYK22LML8F
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
366Informations de copyright
© 2024. The Author(s).
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