Abstract
We previously constructed an arabinose-inducible recombinant Bifidobacterium longum that could efficiently express secreted IFN-α2b in vitro (Deng et al. in Arch Microbiol 191:681–686, 2009). Here, we investigated the influence of oral pBAD-SPIFN-transformed B. longum on immunomodulation and IFN-induced Mx1 gene transcription in mice. We observed enhanced serum and fecal IFN-α2b concentrations in mice orally administered recombinant B. longum, suggesting a possible Th1 pattern of induction in the spleen and Peyer’s patches. Transcription of the typically IFN-induced antiviral Mx1 gene in the hepatic and intestinal tissues of these mice was also markedly enhanced. In conclusion, oral administration of the recombinant B. longum expressing IFN-α2b might play its roles in the immunomodulation of the mice, and the potential clinical value of this bacterium in the treatment of viral infections needs to be further studied.
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This work was supported by two grants from Shenzhen scientific Research Program of the People’s Republic of China (No. 200801020 and No. 200903277) and also supported by a grant from Ministry of Education of China (No. 200901121).
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Communicated by Jorge Membrillo-Hernández.
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Yu, Z., Zeng, Z., Huang, Z. et al. Increased mRNA expression of interferon-induced Mx1 and immunomodulation following oral administration of IFN-α2b-transformed B. longum to mice. Arch Microbiol 192, 633–638 (2010). https://doi.org/10.1007/s00203-010-0589-1
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DOI: https://doi.org/10.1007/s00203-010-0589-1