Role of the β-glucan surface polysaccharide in Propionibacterium freudenreichii: physiological and immunomodulatory properties

B. Foligné (1) , Sandrine Parayre-Breton (2) , Fabien Cousin (2, 3) , J. Dewulf (1) , Gwénaël Jan (2) , Stéphanie-Marie Deutsch (2)

1 CIIL - Centre d’Infection et d’Immunité de Lille - INSERM U 1019 - UMR 9017 - UMR 8204
2 STLO - Science et Technologie du Lait et de l'Oeuf
3 CNIEL Syndifrais

P. freudenreichii (PF) is a Gram + species, with the GRAS (Generally Recognized As Safe) status in the USA and a Qualified Presumption of Safety (QPS) status in Europe. It is widely consumed by humans because it is an essential ripening culture in Swiss type cheeses (Emmental, Leerdammer®…), and also as a probiotic in food supplement (Propio-Fidus®). Recently, PF was shown to produce a (1→3, 1→2)-β-D-glucan polysaccharide. A single gene (named gtf) is responsible for the biosynthesis of this surface polysaccharide, that has been immunodetected for 30% of the 100 strains of PF tested. Here we investigated the role(s) of this β-D-glucan.

Mots clés: polysaccharide; gène; health food; probiotic; food quality

Mots clés: beta glucane; propionibacterium freudenreichii; fromage; aliment santé; probiotique; affinage; qualité des aliments; immunodétection; séquençage de gènes

Domaines: Ingénierie des aliments; Microbiologie et Parasitologie

B. Foligné, Sandrine Parayre-Breton, Fabien Cousin, J. Dewulf, Gwénaël Jan, et al.. Role of the β-glucan surface polysaccharide in Propionibacterium freudenreichii: physiological and immunomodulatory properties. 3. International Symposium on Propionibacteria and Bifidobacteria: Dairy and Probiotic, Jun 2010, Oviedo, Spain. , International Journal of Food Microbiology, Volume 149, Issue 1, Pages 1-112 (1 September 2011), 2010, International Journal of Food Microbiology. ⟨hal-01454346⟩