Address of Corresponding Author

Int Arch Allergy Immunol 2004;135:205-215 (DOI: 10.1159/000081305)

  Key Words

• Lactic acid bacteria
• IgE
• Th1
• Th2
• Lactobacillus paracasei strain KW3110

  Abstract

Background: There is growing interest in the immune-stimulating effect and in particular, the anti-allergic effect, of lactic acid bacteria (LAB). However, no comprehensive studies have been done that compare the immune-stimulating potential of LAB strains. Methods: The in vitro immune-stimulating effects on Th1/Th2 balance of more than 100 LAB strains were compared in splenocytes from ovalbumin-sensitized Th2-polarized mice. The in vivoanti-allergic ability of strain KW3110 was studied in the Th2-polarized model by detecting serum IgE concentration, Th1/Th2 cytokine secretion from splenocytes, and the expression of co-stimulatory molecules on macrophages. Results: In vitro studies from Th2-polarized splenocytes, using IL-12 as a Th1 parameter and IL-4 secretion as a Th2 parameter revealed a wide variety of IL-12-inducing and IL-4-repressing activities, depending on the strain of LAB, not depending on the species. However, evaluation of individual strains in vivo revealed that after exposure to Lactobacillus paracasei KW3110 strain, the serum IgE elevation elicited by repeated OVA injection of mice was strongly inhibited. Cytokine secretion from splenocytes 20 weeks after KW3110 administration showed increased IL-12 and decreased IL-4 expression. Both CD40 and B7-1 expression on macrophages was upregulated by administration of KW3110. Conclusions: Improving the consequences of the Th1/Th2 imbalance by administration of LAB was dependent upon the LAB strain rather than the LAB species. Oral KW3110 administration in the mouse allergy model directed the Th1/Th2 balance toward Th1 through the maturation of APCs and inhibition of serum IgE elevation.

Copyright © 2004 S. Karger AG, Basel

  Author Contacts

Correspondence to: Daisuke Fujiwara, PhD
Central Laboratories for Key Technology
Kirin Brewery Co., Ltd., 1-13-5, Fukuura, Kanazawa
Yokohama, Kanagawa 236-0004 (Japan)
Tel. +81 45 788 7248, Fax +81 45 788 4047, E-Mail d-fujiwara@kirin.co.jp

  Article Information

Received: April 7, 2004
Accepted after revision: July 20, 2004
Published online: October 4, 2004
Number of Print Pages : 11
Number of Figures : 5, Number of Tables : 3, Number of References : 31