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Journals World Journal of Microbiology and Biotechnology Volume 27 Issue 2

We conducted a study to evaluate the possibility that intranasal administration of a new probiotic strain Lactobacillus gasseri TMC0356 (TMC0356) may protect host animals from influenza virus (IFV) infection, which was indicated by enhanced respiratory immune responses in a mouse model. After 3 days of exposure to TMC0356, BALB/c mice were intranasally infected with IFVA/PR/8/34 (H1N1). Lung cells were isolated from the tested mice and evaluated for cytotoxicity against YAC-1 cells. After intranasal treatment with TMC0356, mice showed a lower morbidity and higher survival rate compared to control mice ( P < 0.05). The cytotoxicity of lung cells isolated from mice after intranasal treatment against YAC-1 cells was statistically higher than that of lung cells isolated from control mice ( P < 0.05). Intranasal administration of TMC0356 significantly increased mRNA expression of interleukin (IL)-1β, tumor necrosis factor, IL-10, and monocyte chemotactic protein-1 ( P < 0.01). These results suggest that intranasal administration of TMC0356 may protect the host animal from IFV infection. They also indicate that TMC0356 can enhance respiratory cell-mediated immune responses of host animals characteristically with up-regulated activation of lung natural killer cells. Further studies will evaluate the possible role of the immune stimulatory effects of TMC0356 within the protective effects of this bacterium against IFV, as observed in the present study.

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Intranasally administered Lactobacillus gasseri TMC0356 protects mice from H1N1 influenza virus infection by stimulating respiratory immune responses

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  • Publisher Springer Netherlands
  • Copyright Copyright © 2011 by Springer Science+Business Media B.V.
  • Subject Chemistry; Microbiology ; Environmental Engineering/Biotechnology; Applied Microbiology; Biochemistry, general; Biotechnology
  • ISSN 0959-3993
  • eISSN 1573-0972
  • D.O.I. 10.1007/s11274-010-0472-x
  • Publisher site Get PDF  

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