title: Saccharomyces cerevisiae strain UFMG 905 protects against bacterial translocation, preserves gut barrier integrity and stimulates the immune system in a murine intestinal obstruction model.
abstract: Probiotic is a preparation containing microorganisms that confers beneficial effect to the host. This work assessed whether oral treatment with viable or heat-killed yeast Saccharomyces cerevisiae strain UFMG 905 prevents bacterial translocation (BT), intestinal barrier integrity, and stimulates the immunity, in a murine intestinal obstruction (IO) model. Four groups of mice were used: mice undergoing only laparotomy (CTL), undergoing intestinal obstruction (IO) and undergoing intestinal obstruction after previous treatment with viable or heat-killed yeast. BT, determined as uptake of (99m)Tc-E. coli in blood, mesenteric lymph nodes, liver, spleen and lungs, was significantly higher in IO group than in CTL group. Treatments with both yeasts reduced BT in blood and all organs investigated. The treatment with both yeasts also reduced intestinal permeability as determined by blood uptake of (99m)Tc-DTPA. Immunological data demonstrated that both treatments were able to significantly increase IL-10 levels, but only viable yeast had the same effect on sIgA levels. Intestinal lesions were more severe in IO group when compared to CTL and yeasts groups. Concluding, both viable and heat-killed cells of yeast prevent BT, probably by immunomodulation and by maintaining gut barrier integrity. Only the stimulation of IgA production seems to depend on the yeast viability.
authors.affiliation: Departamento De Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal de Minas Gerais, C. P. 486, 30161-970, Belo Horizonte, MG, Brazil.
authors.forename: Simone V
authors.initials: SV
authors.lastname: Generoso
authors.forename: Mirelle
authors.initials: M
authors.lastname: Viana
authors.forename: Rosana
authors.initials: R
authors.lastname: Santos
authors.forename: Flaviano S
authors.initials: FS
authors.lastname: Martins
authors.forename: José A N
authors.initials: JA
authors.lastname: Machado
authors.forename: Rosa M E
authors.initials: RM
authors.lastname: Arantes
authors.forename: Jacques R
authors.initials: JR
authors.lastname: Nicoli
authors.forename: Maria I T D
authors.initials: MI
authors.lastname: Correia
authors.forename: Valbert N
authors.initials: VN
authors.lastname: Cardoso
mesh_terms: D000818:Animals; D018988:Bacterial Translocation; D004926:Escherichia coli / Q000502:physiology; D007071:Immunoglobulin A, Secretory / Q000032:analysis; D056747:Immunomodulation; D016753:Interleukin-10 / Q000097:blood; D007413:Intestinal Mucosa / Q000276:immunology / Q000473:pathology / Q000503:physiopathology; D007415:Intestinal Obstruction / Q000276:immunology / Q000382:microbiology / Q000473:pathology / Q000628:therapy*; D007422:Intestines / Q000276:immunology / Q000382:microbiology / Q000473:pathology / Q000503:physiopathology*; D008099:Liver / Q000382:microbiology / Q000473:pathology; D008168:Lung / Q000382:microbiology / Q000473:pathology; D008198:Lymph Nodes / Q000382:microbiology / Q000473:pathology; D008297:Male; D051379:Mice; D050296:Microbial Viability; D010539:Permeability; D019936:Probiotics / Q000008:administration & dosage / Q000627:therapeutic use*; D012441:Saccharomyces cerevisiae / Q000502:physiology; D013154:Spleen / Q000382:microbiology / Q000473:pathology; D016284:Technetium Tc 99m Pentetate
chemical_list: D007071:Immunoglobulin A, Secretory; D016753:Interleukin-10; D016284:Technetium Tc 99m Pentetate