title: Immunomodulating potential of supplementation with probiotics: a dose-response study in healthy young adults.
abstract: Certain probiotic microorganisms have been found beneficial in the treatment of immune-related diseases and may also affect immune function in healthy people. Intervention studies of probiotics in healthy humans are urgently required. Here, the immunomodulating potential of Bifidobacterium animalis ssp. lactis (BB-12) and Lactobacillus paracasei ssp. paracasei (CRL-431) was studied in a double-blind placebo-controlled parallel dose-response trial (n=71) based on five randomly assigned groups of young healthy adults supplemented for 3 weeks with 0, 10(8), 10(9), 10(10) and 10(11) CFU day(-1), respectively, of a mixture of BB-12 and CRL-431. No statistically significant dose-dependent effect was found for phagocytic activity in blood leukocytes, fecal immunoglobulin A (IgA) concentrations or production of interferon-gamma and interleukin-10 in blood cells. When evaluating data according to the amount of viable BB-12 recovered from faeces, the interferon-gamma production in blood cells was significantly reduced. In conclusion, no solid effect on the immune function of young healthy adults supplemented with even high doses of B. animalis ssp. lactis BB-12 and L. paracasei ssp. paracasei CRL-431 was demonstrated in this study.
authors.affiliation: BioCentrum-DTU, Biochemistry and Nutrition Group, Technical University of Denmark, Lyngby, Denmark.
authors.forename: Hanne Risager
authors.initials: HR
authors.lastname: Christensen
authors.forename: Charlotte Nexmann
authors.initials: CN
authors.lastname: Larsen
authors.forename: Pernille
authors.initials: P
authors.lastname: Kaestel
authors.forename: Lisbeth Buus
authors.initials: LB
authors.lastname: Rosholm
authors.forename: Claus
authors.initials: C
authors.lastname: Sternberg
authors.forename: Kim Fleischer
authors.initials: KF
authors.lastname: Michaelsen
authors.forename: Hanne
authors.initials: H
authors.lastname: Frøkiaer
mesh_terms: D000293:Adolescent; D000328:Adult; D001644:Bifidobacterium / Q000276:immunology / Q000302:isolation & purification; D016207:Cytokines / Q000097:blood*; D019587:Dietary Supplements; D004306:Dose-Response Relationship, Immunologic; D004311:Double-Blind Method; D005243:Feces / Q000382:microbiology; D005260:Female; D006801:Humans; D007070:Immunoglobulin A / Q000032:analysis / Q000097:blood; D007136:Immunoglobulins / Q000097:blood; D007155:Immunologic Factors / Q000008:administration & dosage*; D007778:Lactobacillus / Q000276:immunology / Q000302:isolation & purification; D008213:Lymphocyte Activation; D008297:Male; D010586:Phagocytes / Q000187:drug effects*; D010587:Phagocytosis; D019936:Probiotics / Q000008:administration & dosage*
chemical_list: D016207:Cytokines; D007070:Immunoglobulin A; D007136:Immunoglobulins; D007155:Immunologic Factors