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Title

A proteomic approach towards understanding the cross talk between Bacteroides fragilis and Bifidobacterium longum in coculture

AuthorsRios-Covián, David ; Sánchez García, Borja ; Martínez Álvarez, Noelia ; Cuesta Suárez, Isabel ; Hernández-Barranco, Ana María ; González de los Reyes-Gavilán, Clara ; Gueimonde Fernández, Miguel
KeywordsCross talk
Interaction
Coculture
Bacteroides
Bifidobacterium
Issue Date4-Mar-2016
PublisherCanadian Science Publishing
CitationCanadian Journal of Microbiology 62: 623-628 (2016)
AbstractA better understanding of the interactions among intestinal microbes is needed to decipher the complex cross talk that takes place within the human gut. Bacteroides and Bifidobacterium genera are among the most relevant intestinal bacteria, and it has been previously reported that coculturing of these 2 microorganisms affects their survival. Therefore, coculturing of Bifidobacterium longum NB667 and Bacteroides fragilis DSMZ2151 was performed with the aim of unravelling the mechanisms involved in their interaction. To this end, we applied proteomic (2D-DIGE) analyses, and by chromatographic techniques we quantified the bacterial metabolites produced during coincubation. Coculture stimulated the growth of B. longum, retarding that of B. fragilis, with concomitant changes in the production of some proteins and metabolites of both bacteria. The combined culture promoted upregulation of the bifidobacterial pyruvate kinase and downregulation of the Bacteroides phosphoenolpyruvate carboxykinase - 2 enzymes involved in the catabolism of carbohydrates. Moreover, B. fragilis FKBP-type peptidyl-prolyl cis-trans isomerase, a protein with chaperone-like activity, was found to be overproduced in coculture, suggesting the induction of a stress response in this microorganism. This study provides mechanistic data to deepen our understanding of the interaction between Bacteroides and Bifidobacterium intestinal populations. Copyright NRC Research Press
Publisher version (URL)https://doi.org/10.1139/cjm-2015-0804
URIhttp://hdl.handle.net/10261/143241
DOI10.1139/cjm-2015-0804
Identifiersissn: 1480-3275
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