Int Arch Allergy Immunol. 2007 Oct 4;145(3):249-257 [Epub ahead of print]

 

Antiallergic Effects of Lactobacillus pentosus Strain S-PT84 Mediated by Modulation of Th1/Th2 Immunobalance and Induction of IL-10 Production.

 

Nonaka Y, Izumo T, Izumi F, Maekawa T, Shibata H, Nakano A, Kishi A, Akatani K, Kiso Y. Institute for Health Care Science, Suntory Ltd., Osaka, Japan.

 

 

Background: Many types of fermented food are consumed in Japan. Although some are produced by plant-origin lactic-acid bacteria (LAB) fermentation, the physiological functions of such bacteria remain unclear. We therefore isolated LAB of plant origin from Kyoto pickles and determined the immunological activity of heat-killed preparations of plant-origin LAB.

 

Methods: The Lactobacillus pentosus strain S-PT84 was selected from among 16 LAB of plant origin as the strongest interleukin (IL)-12-inducing strain. IL-12- and IL-10-inducing activities were determined with macrophages from BALB/c mice. The in vivo immunomodulating effect of S-PT84was determined with BALB/c mice fed S-PT84. The antiallergic activity of S-PT84 was examined in ovalbumin (OVA)/alum-administered BALB/c mice.

 

Results: The L. pentosus strain S-PT84 induced production of both IL-12 and IL-10 in vitro. S-PT84 enhanced splenic natural-killer activity and modulated the T helper (Th) type 1/type 2 balance toward a Th1-dominant state. In the OVA-induced allergy model, orally administered S-PT84 lowered serum IgE levels and suppressed active cutaneous anaphylaxis reaction and splenic IL-4 production. IL-10 production from splenocytes of OVA-immunized mice was upregulated by feeding S-PT84.

 

Conclusions: Despite heat-killing, S-PT84 exhibited antiallergic effects by modulating the Th1/Th2 balance and inducing regulatory T cells. The L. pentosus strain S-PT84, which is of plant origin and isolated from a traditional Japanese food, is expected to be useful for treatment of many immune diseases including allergies, tumors, infectious diseases and auto-immune diseases. Copyright (c) 2007 S. Karger AG, Basel.

 

PMID: 17914277 [PubMed - as supplied by publisher]

 

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