Differential effects of lactobacilli on activation and maturation of mouse dendritic cells
2014
Lactic acid bacteria (LAB) are of interest because of their potential to modulate immune responses. The effects of LAB range from regulation to stimulation of the immune system. A series of studies were performed in vitro to study the effects of six lactic acid bacteria (LAB), Lactobacillus helveticus LH-2, Lactobacillus acidophilus La-5, La-115, La-116 and La-14, and Lactobacillus salivarius, on maturation and activation of mouse dendritic cells. Production of tumour necrosis factor (TNF)-?, interleukin (IL)-6 and IL-10 by dendritic cells (DCs) was determined after treating cells with live LAB. The expression of DC maturation markers, CD80 and CD40, was also measured using flow cytometry after stimulation with LAB. In addition, the expression of Toll-like receptors (TLRs) 2, 4 and 9 by DCs stimulated with LAB was measured. Our results revealed that LAB act differentially on pro-inflammatory and anti-inflammatory cytokine production and induction of co-stimulatory molecules by DCs. Specifically, L. saliva...
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