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Validation of the dorsal air pouch model to predict and examine immunostimulatory responses in the gut.

Abstract：

AIMS:To validate the use of the air pouch system to predict and examine early immune responses induced by the presumptive probiotics Lactobacillus paracasei subsp. paracasei B112, DC205, DC215 and DC412 strains in the gut mucosa. METHODS AND RESULTS:Only the DC412 strain interacted strongly with the cells forming the air pouch lining tissue and induced early innate immune responses such as polymorphonuclear (PMN) cell recruitment, phagocytosis and tumour necrosis factor alpha (TNF-alpha) production that equal the respective responses induced by the probiotic Lactobacillus acidophilus NCFB 1748. The strains exhibiting strong immunoregulatory activity in the air pouch also interacted strongly with the gut-associated lymphoid tissue (GALT). The strain DC412 exerts its effect on the intestine through stimulation of Toll-like receptor (TLR)2/TLR4-mediated signalling events leading to secretion of a certain profile of cytokines in which gamma interferon (IFN-gamma), TNF-alpha, interleukin (IL)-6 and IL-10 are included. The probiotic Lact. acidophilus NCFB 1748 induces the same cytokine profile in addition to IL-12B, and this response is potentially mediated by the synergy of TLR2 and TLR9. CONCLUSION:The strain DC412 possesses the in vitro and in vivo characteristics of a probiotic micro-organism. SIGNIFICANCE AND IMPACT OF THE STUDY:The dorsal mouse or rat air pouch may be used as an alternative and rapid method for the initial discrimination and selection of potential probiotic Lactobacillus strains.

journal_name

J Appl Microbiol

journal_title

Journal of applied microbiology

authors

Kourelis A,Zinonos I,Kakagianni M,Christidou A,Christoglou N,Yiannaki E,Testa T,Kotzamanidis C,Litopoulou-Tzanetaki E,Tzanetakis N,Yiangou M

doi

10.1111/j.1365-2672.2009.04421.x

subject

Has Abstract

pub_date

2010-01-01 00:00:00

pages

274-84

issue

1

eissn

1364-5072

issn

1365-2672

pii

JAM4421

journal_volume

108

pub_type

杂志文章

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