Effects of polysaccharide isolated from Streptococcus thermophilus CRL1190 on human gastric epithelial cells

• Published in: International journal of biological macromolecules Vol. 62; no. 1-2; pp. 217 - 224
• Main Authors: Marcial, Guillermo, Messing, Jutta, Menchicchi, Bianca, Goycoolea, Francisco M., Faller, Gerhard, Graciela, Font de Valdez, Hensel, Andreas
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01.11.2013
• Subjects: absorption; adhesion; Animals; anti-inflammatory activity; Cell Line, Tumor; Cell Survival - drug effects; confocal laser scanning microscopy; Cytokines - secretion; Cytoprotection; defense mechanisms; Dose-Response Relationship, Drug; endosomes; epithelial cells; Epithelial Cells - drug effects; Epithelial Cells - microbiology; epithelium; Exo-polysaccharide; fermented milk; galactose; glucose; Helicobacter - physiology; Helicobacter pylori; Human gastric epithelial cells; Humans; interleukin-6; interleukin-8; macrophages; Macrophages - drug effects; Macrophages - secretion; Mice; Mucin; mucins; mucus; nitric oxide; phagocytosis; polymers; polysaccharides; Polysaccharides - biosynthesis; Polysaccharides - isolation & purification; Polysaccharides - pharmacology; secretion; skim milk; stomach; Stomach - cytology; Streptococcus thermophilus; Streptococcus thermophilus - metabolism; viscosity; zeta potential; FITC; Streptococcus thermophilus; Mucin; Helicobacter pylori; MOI; EPS; CLS; Human gastric epithelial cells; Exo-polysaccharide; Cytoprotection; fluorescein isoisothiocyanate; multiplicity of infection; confocal laser scanning microscopy
• ISSN: 0141-8130; 1879-0003
• DOI: 10.1016/j.ijbiomac.2013.08.011

EPS1190 was isolated from skim milk fermented with Stretococcus thermophilus CRL1190. The polysaccharide consisted of 33% glucose and 66% galactose with 1,4- and 1,4,6-galactose residues as main building blocks beside a high amount of 1,4-linked glucose. The polymer was characterized additionally concerning viscosity and zeta potential. EPS1190 stimulated cellular vitality and proliferation of human stomach AGS cells and human buccal KB cells significantly. EPS1190 stimulated phagocytosis rate of murine macrophages RAW264.7 significantly. NO-release or anti-inflammatory effects by inhibition of LPS-induced NO release were not observed. Confocal laser scanning microscopy revealed that EPS1190 is partially internalized into AGS cells via endosomes. The bioadhesive absorption of FITC-labeled EPS1190 into the mucus layer on the apical side of the epithelium using histological tissue sections from human stomach was observed. Specific interaction of EPS1190 with mucin can be excluded as shown by microviscosimetry studies. EPS1190 increased the adhesion of H. pylori to AGS cells, which resulted in increased secretion of proinflammatory cytokines TNFa, IL-6 and IL-8. Summarizing, EPS1190 seems to stimulate epithelial cell regeneration and immunological innate defense mechanisms, which again can rationalized the use of this polysaccharide as cytoprotective compound in probiotioc preparations.