Mice were subcutaneously injected with 1.5 µg of filgrastim or the same volume of PBS, shortly after the injection of C. perfringens. To inhibit G-CSFR, a neutralizing antibody against G-CSFR (R&D systems, Minneapolis, MN, USA) was used as described in a previous report [33 (link)]. The neutralizing antibody or Rat IgG2B isotype control (R&D systems, Minneapolis, MN, USA) was intraperitoneally administered to C. perfringens-infected mice at 5 µg per mouse shortly after the injection of C. perfringens. This dose was 10 times higher than that in the previous report [33 (link)].
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