Immunomodulatory effects ofBacillus firmus on mouse peritoneal cellsin Vitro

• Published in: Folia microbiologica 2006-05, Vol.51 (3), p.243-247, Article 243
• Main Authors: Lomakova, I, Petraskova, P, Sterzl, I, Prokesova, L
• Format: Article
• Language: English
• Subjects: Cell activation; Cell culture; Cytokines; gamma -Interferon; IL-1β; Immunology; Immunomodulation; Inbreeding; Interleukin 1; Interleukin 10; Interleukin 12; Macrophages; Nitric oxide; Peritoneum; Rodents; Stimulation; Tumor necrosis factor- alpha; Tumor necrosis factor-α; γ-Interferon
• ISSN: 0015-5632; 1874-9356
• DOI: 10.1007/BF02932130

The effect of nonpathogenic G+ bacteriumB. firmus (BF) on stimulation of mouse peritoneal cellsin vitro was evaluated by testing nitric-oxide-synthesis induction and cytokine formation. The reactivity was compared of peritoneal cells from two inbred mouse strains, C57B1/6 and BALB/c, which differ in their immunological reactivity. Peritoneal macrophages from C57B1/6 produced more nitric oxide after a 1-d cultivation with inactivated BF than those of BALB/c mice. In both strains, production can be further increased by adding exogenous IFN-γ to the culture. There were no significant differences between peritoneal cells of these two mouse strains in cytokine production after optimalin vitro stimulation with BF. BF effectively activated peritoneal cells for the production of TNF-α, IL-1β and IL-10, delipidated bacterium (DBF) being more efficient than BF in induction of IL-10 and TNF-α. On the other hand, BF had only small effect on IFN-γ production and no detectable effect on IL-12 production. Macrophage activation by BF/DBF can represent one of the mechanisms responsible for previously described immunomodulatory activity of BF.