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Deprecated: Implicit conversion from float 253.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Int+Immunopharmacol 2014 ; 18 (1): 50-4 Nephropedia Template TP
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Lactobacillus fermentum CJL-112 protects mice against influenza virus infection by activating T-helper 1 and eliciting a protective immune response #MMPMID24201084
Yeo JM; Lee HJ; Kim JW; Lee JB; Park SY; Choi IS; Song CS
Int Immunopharmacol 2014[Jan]; 18 (1): 50-4 PMID24201084show ga
We have previously reported that nasally administered Lactobacillus fermentum CJL-112 (CJL-112) efficiently improves resistance against lethal influenza infection in both mice and chicken. The aim of the present study was to understand the underlying mechanisms of the significant anti-influenza activity of this lactobacilli strain. In vitro, co-culturing of the chicken macrophage cell line HD-11 with CJL-112 significantly increased nitric oxide (NO) production. In vivo, CJL-112 was nasally administered to BALB/c mice for 21 days prior to influenza A/NWS/33 (H1N1) virus (IFV) infection. Significant up-regulation of T-helper 1 (Th1) cytokines (IL-2, IFN-gamma) was observed, while the levels of T-helper 2 (Th2) cytokines (IL-4, IL-5, IL-10) was either reduced or unchanged than that in control mice were. Furthermore, IgA and specific anti-influenza IgA levels increased significantly in the treated mice than those in untreated mice. Therefore, CJL-112 likely protects the mice against lethal IFV infection via stimulation of macrophages, activation of Th1 and augmentation of IgA production, when directly delivered into the respiratory tract.