title: Naturally occurring 2-substituted (1,3)-beta-D-glucan producing Lactobacillus suebicus and Pediococcus parvulus strains with potential utility in the production of functional foods.
abstract: We have isolated three lactic acid bacteria (Lactobacillus suebicus CUPV221, Pediococcus parvulus CUPV1 and P. parvulus CUPV22) that produced high levels of 2-substituted (1,3)-beta-D-glucans which increased the viscosity of the growth media. The (1,3)-beta-D-glucan consisted of two main molecular species, with masses of approximately 10(7) and 10(4) Da, whose proportions varied among the strains. The three strains survived exposure to saliva and simulated gastric conditions at pH 5, with P. parvulus CUPV22 surviving at pH 3.1, and L. suebicus CUPV221 surviving at pH 1.8. All strains were resistant to pancreatin and bile salts. P. parvulus CUPV22 exhibited the highest adhesion (10.5%) to Caco-2 cells, which decreased to 1.2% after washing the cells. Finally, P. parvulus CUPV22 and L. suebicus CUPV221 induced the production of inflammation-related cytokines by polarized macrophages, and interestingly, L. suebicus stimulated the production of cytokine IL-10. These results indicate that the three strains have potential utility for the production of functional foods.
authors.affiliation: Facultad de Ciencias Químicas, Dpto de Química Aplicada, Universidad del País Vasco (UPV/EHU), Paseo Manuel de Lardizabal 3, 20018 Donostia, Spain.
authors.forename: Gaizka
authors.initials: G
authors.lastname: Garai-Ibabe
authors.forename: María Teresa
authors.initials: MT
authors.lastname: Dueñas
authors.forename: Ana
authors.initials: A
authors.lastname: Irastorza
authors.forename: Elena
authors.initials: E
authors.lastname: Sierra-Filardi
authors.forename: María Laura
authors.initials: ML
authors.lastname: Werning
authors.forename: Paloma
authors.initials: P
authors.lastname: López
authors.forename: Angel Luis
authors.initials: AL
authors.lastname: Corbí
authors.forename: Pilar
authors.initials: P
authors.lastname: Fernández de Palencia
mesh_terms: D001422:Bacterial Adhesion; D018938:Caco-2 Cells; D016207:Cytokines / Q000378:metabolism; D005110:Extracellular Space / Q000378:metabolism; D005516:Food Microbiology; D006801:Humans; D007218:Industrial Microbiology; D007778:Lactobacillus / Q000166:cytology / Q000378:metabolism*; D008264:Macrophages / Q000378:metabolism / Q000382:microbiology; D050296:Microbial Viability; D010376:Pediococcus / Q000166:cytology / Q000378:metabolism*; D011135:Polysaccharides, Bacterial / Q000096:biosynthesis; D019936:Probiotics / Q000378:metabolism; D011509:Proteoglycans; D047071:beta-Glucans / Q000378:metabolism*
chemical_list: D016207:Cytokines; D011135:Polysaccharides, Bacterial; D011509:Proteoglycans; D047071:beta-Glucans; C010770:polysaccharide-K