Abstract
<b>Background:</b><i>Lactobacillus casei</i> is a nonpathogenic gram-positive bacterium widely used in dairy products and has been shown to enhance the cellular immunity of the host. <b>Methods:</b> To examine the inhibitory effect of <i>L. casei</i> on IgE production, splenocytes obtained from ovalbumin (OVA)-primed BALB/c mice were restimulated in vitro with the same antigen in the presence of heat-killed <i>L. casei</i>. The effect of this bacterium on T helper (Th) phenotype development was also examined with naive T cells from OVA-specific T cell receptor-transgenic mice. <b>Results:</b><i>L. casei</i> induced IFN-γ, but inhibited IL-4 and IL-5 secretion, and markedly suppressed total and antigen-specific IgE secretion by OVA-stimulated splenocytes. The inhibitory effect of <i>L. casei</i> on IgE, IL-4, and IL-5 production was partially abrogated by addition of neutralizing antibody to IFN-γ. Augmented IL-12 production was also observed in the cell cultures containing <i>L. casei</i>, and anti-IL-12 monoclonal antibody completely restored the IgE, IL-4, and IL-5 production to the control levels. The IL-12 augmentation by <i>L. casei</i> was macrophage-dependent. The Th cell development assay showed the ability of <i>L. casei</i> to induce Th1 development preferentially. This effect was also completely blocked by anti-IL-12 antibody. <b>Conclusions:</b> This is the first demonstration that a nonpathogenic microorganism, <i>L. casei</i>, can inhibit antigen-induced IgE production through induction of IL-12 secretion by macrophages. The findings suggest a potential use of this organism in preventing IgE-mediated allergy.
Bibliography
Shida, K., Makino, K., Morishita, A., Takamizawa, K., Hachimura, S., Ametani, A., Sato, T., Kumagai, Y., Habu, S., & Kaminogawa, S. (1998). Lactobacillus casei Inhibits Antigen-Induced IgE Secretion through Regulation of Cytokine Production in Murine Splenocyte Cultures. International Archives of Allergy and Immunology, 115(4), 278â287. Portico.
Dates
Type | When |
---|---|
Created | 22 years, 4 months ago (April 15, 2003, 6:10 a.m.) |
Deposited | 4 months, 1 week ago (April 23, 2025, 11:45 p.m.) |
Indexed | 3 months, 2 weeks ago (May 18, 2025, 10:24 a.m.) |
Issued | 27 years, 8 months ago (Jan. 1, 1998) |
Published | 27 years, 8 months ago (Jan. 1, 1998) |
Published Online | 27 years, 5 months ago (April 2, 1998) |
Published Print | 27 years, 8 months ago (Jan. 1, 1998) |
@article{Shida_1998, title={Lactobacillus casei Inhibits Antigen-Induced IgE Secretion through Regulation of Cytokine Production in Murine Splenocyte Cultures}, volume={115}, ISSN={1423-0097}, url={http://dx.doi.org/10.1159/000069458}, DOI={10.1159/000069458}, number={4}, journal={International Archives of Allergy and Immunology}, publisher={S. Karger AG}, author={Shida, Kan and Makino, Kumiko and Morishita, Aki and Takamizawa, Kotaro and Hachimura, Satoshi and Ametani, Akio and Sato, Takehito and Kumagai, Yoshihiro and Habu, Sonoko and Kaminogawa, Shuichi}, year={1998}, pages={278–287} }