Enhanced antiinflammatory capacity of a Lactobacillus plantarum mutant synthesizing modified teichoic acids

Corinne Grangette, Sophie Nutten, Emmanuelle Palumbo, Siegfried Morath, Corinna Hermann, Joelle Dewulf, Bruno Pot, Thomas Hartung, Pascal Hols, Annick Mercenier

Onderzoeksoutput: Articlepeer review

359 Citaten (Scopus)

Samenvatting

Teichoic acids (TAs), and especially lipoteichoic acids (LTAs), are one of the main immunostimulatory components of pathogenic Gram-positive bacteria. Their contribution to the immunomodulatory properties of commensal bacteria and especially of lactic acid bacteria has not yet been investigated in detail. To evaluate the role of TAs in the interaction between lactic acid bacteria and the immune system, we analyzed the antiinflammatory properties of a mutant of Lactobacillus plantarum NCIMB8826 affected in the TA biosynthesis pathway both in vitro (mononuclear cells stimulation) and in vivo (murine model of colitis). This Dlt- mutant was found to incorporate much less D-Ala in its TAs than the WT strain. This defect significantly impacted the immunomodulation reactions induced by the bacterium, as shown by a dramatically reduced secretion of proinflammatory cytokines by peripheral blood mononuclear cells and monocytes stimulated by the Dlt- mutant as compared with the parental strain. Concomitantly, a significant increase in IL-10 production was stimulated by the Dlt- mutant in comparison with the WT strain. Moreover, the proinflammatory capacity of L. plantarum-purified LTA was found to be Toll-like receptor 2-dependent. Consistent with the in vitro results, the Dlt- mutant was significantly more protective in a murine colitis model than its WT counterpart. The results indicated that composition of LTA within the whole-cell context of L. plantarum can modulate proinflammatory or antiinflammatory immune responses.

Originele taal-2English
Pagina's (van-tot)10321-10326
Aantal pagina's6
TijdschriftProceedings of the National Academy of Sciences of the United States of America
Volume102
Nummer van het tijdschrift29
DOI's
StatusPublished - 19 jul 2005

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