Toscano M.,University of Milan |
De Vecchi E.,IRCCS Galeazzi Orthopaedic Institute |
Gabrieli A.,IRCSS Galeazzi Orthopaedic Institute |
Zuccotti G.V.,Luigi Sacco Hospital |
And 2 more authors.
Annals of Microbiology | Year: 2015
The consumption of probiotic-based products has risen greatly in recent decades. Due to their probiotic characteristics, microorganisms such as lactobacilli and bifidobacteria are in daily use in the production of food supplements. In the present study, three bifidobacterial strains (Bifidobacterium breve M-16 V, Bifidobacterium longum subsp. infantis M-63 and Bifidobacterium longum subsp. longum BB536) were tested for growth compatibility, resistance to antimicrobial agents, antibacterial activity against pathogens, resistance to gastric acidity, bile salt hydrolysis and adhesion to the human intestinal epithelial cell line HT29. All of these strains were resistant to gentamycin, but none showed in vitro growth incompatibility or the presence of known resistance determinants. B. breve M-16 V had the best probiotic characteristics and, indeed, was the only strain possessing antibacterial activity against Escherichia coli and Klebsiella pneumoniae. All strains were resistant to simulated gastric juice, while only B. longum subsp. longum BB536 and B. breve M-16 V showed a bile salt hydrolytic activity. Interestingly, a strong adhesion to HT29 cells was observed in all Bifidobacterium strains. In conclusion, B. breve M-16 V, B. longum subsp. longum BB536 and B. longum subsp. infantis M-63 showed several promising characteristics as probiotic strains. © 2014, Springer-Verlag Berlin Heidelberg and the University of Milan.
Drago L.,University of Milan |
Drago L.,IRCSS Galeazzi Orthopaedic Institute |
De Vecchi E.,University of Milan |
Toscano M.,University of Milan |
And 5 more authors.
Journal of Clinical Gastroenterology | Year: 2014
Goals: To evaluate the efficacy of a highly concentrated Lactobacillus salivarius preparation containing a gelling complex formed by Streptococcus thermophilus ST10 and tara gum in the treatment of atopic dermatitis (AD).Background: Previous studies have demonstrated an improvement in AD symptoms after administration of the probiotic strain L. Salivarius LS01. S. thermophilus ST10 and tara gum create a gelling complex that adheres to intestinal mucus and improves barrier function.Study: A prospective, controlled pilot trial was carried out to evaluate how the association of S. thermophilus ST10 and tara gum could improve the activity of L. Salivarius LS01 administered at high doses to adults with AD. Twenty-five patients were included into the study: 13 were treated for 1 month with the active formulation, whereas 12 represented the placebo group. Scoring Atopic Dermatitis index was determined before and at the end of probiotic administration. Fecal samples were also collected to evaluate changes in bacterial counts of Staphylococcus aureus and clostridia.Results: A significant improvement in SCORAD index was observed in the probiotic group after 1 month of treatment, whereas no significant changes occurred in placebo patients. A slight decrease in fecal S. aureus count was observed in probiotictreated patients.Conclusions: Data obtained in this study suggest a potential role for L. Salivarius LS01 in the treatment of AD. The addition of tara gum and S. thermophilus ST10 seems to improve the overall efficacy of the probiotic strain, in particular shortening the time required for the onset of the positive effects. Further studies to investigate the activity of this preparation are advisable. © 2014 by Lippincott Williams & Wilkins.