Consumption of Bifidobacterium animalis subsp. lactis BB-12 in yogurt reduced expression of TLR-2 on peripheral blood-derived monocytes and pro-inflammatory cytokine secretion in young adults
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Probiotic bacteria modulate immune parameters and inflammatory outcomes. Emerging evidence demonstrates that the matrix used to deliver probiotics may influence the efficacy of probiotic interventions in vivo. The aims of the current study were to evaluate (1) the effect of one species, Bifidobacterium animalis subsp. lactis BB-12 at a dose of log10 ± 0.5 CFUs/day on immune responses in a randomized, partially blinded, 4-period crossover, free-living study, and (2) whether the immune response to BB-12 differed depending on the delivery matrix.
Healthy adults (n = 30) aged 18–40 years were recruited and received four treatments in a random order: (A) yogurt smoothie alone; smoothie with BB-12 added (B) before or (C) after yogurt fermentation, or (D) BB-12 given in capsule form. At baseline and after each 4-week treatment, peripheral blood mononuclear cells (PBMCs) were isolated, and functional and phenotypic marker expression was assessed.
BB-12 interacted with peripheral myeloid cells via Toll-like receptor 2 (TLR-2). The percentage of CD14+HLA-DR+ cells in peripheral blood was increased in male participants by all yogurt-containing treatments compared to baseline (p = 0.0356). Participants who consumed yogurt smoothie with BB-12 added post-fermentation had significantly lower expression of TLR-2 on CD14+HLA-DR+ cells (p = 0.0186) and reduction in TNF-α secretion from BB-12- (p = 0.0490) or LPS-stimulated (p = 0.0387) PBMCs compared to baseline.
These findings not only demonstrate a potential anti-inflammatory effect of BB-12 in healthy adults, but also indicate that the delivery matrix influences the immunomodulatory properties of BB-12.
KeywordsProbiotics BB-12 Delivery matrix Inflammation TNF-α
Tumor necrosis factor alpha
Monocyte-derived dendritic cells
Inflammatory bowel disease
Irritable bowel syndrome
de Man, Rogosa, and Sharpe
Nalidixic acid, neomycin sulfate, lithium chloride, and paromomycin sulfate
Peripheral blood mononuclear cell
Clinical Research Center
Body mass index
International Physical Activity Questionnaire
High-sensitivity C-reactive protein
Mean fluorescence intensity
- n-3 PUFA
n-3 Polyunsaturated fatty acids
Metabolic equivalent of task
Intestinal epithelial cell
Suppressor of cytokine signaling
J.A.F., P.K.E., R.F.R., and C.J.R. designed the research; H.M., Z.B., Y.L., and E.J.F. conducted the research; J.P., J.L., and H.M. analyzed the data; H.M. and C.J.R. wrote the paper; and C.J.R. had primary responsibility for the final content. All authors read and approved the final manuscript. This research was supported by a grant from the Dairy Research Institute and the Broadhurst Career Development Fund. Graduate Research Fellowships were provided through the Departments of Food Science and Nutritional Sciences at the Pennsylvania State University.
Compliance with ethical standards
Conflict of interest
H. Meng, Z. Ba, Y. Lee, J. Peng, J. Lin, J.A. Fleming, E.J. Furumoto, R.F. Roberts, P.M. Kris-Etherton, and C.J. Rogers have no conflicts of interest.
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