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Validation of the dorsal air pouch model to predict and examine immunostimulatory responses in the gut
Author(s) -
Kourelis A.,
Zios I.,
Kakagianni M.,
Christidou A.,
Christoglou N.,
Yiannaki E.,
Testa T.,
Kotzamanidis C.,
LitopoulouTzanetaki E.,
Tzanetakis N.,
Yiangou M.
Publication year - 2010
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1111/j.1365-2672.2009.04421.x
Subject(s) - lactobacillus paracasei , probiotic , biology , lactobacillus acidophilus , immune system , microbiology and biotechnology , tlr2 , innate immune system , tumor necrosis factor alpha , ex vivo , cytokine , bifidobacterium breve , immunology , in vivo , lactobacillus , bifidobacterium , bacteria , genetics
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‐α) 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‐γ), TNF‐α, 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.