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Nasal inoculation of recombinant NPP increased IL‐6 in BALF in mice (A) Recombinant NPP or GFP was inoculated into the nasal cavities of ICR mice for 6 h. The levels of IL‐6 in BALF were measured by ELISA. The level of IL‐6 induced by recombinant NPP was expressed as fold change over that induced by recombinant GFP. The P‐value of < 0.001 (***) from three different experiments with mean ± SD was shown.
