Figure 2

TNF-α and IFN-γ immunoreactivity in the mouse circumvallate epithelium. Immunofluorescent staining of mouse circumvallate papillae taken 6 h after LPS-injection. A, Confocal fluorescent images of circumvallate sections stained with control normal rabbit IgG (Rb IgG), affinity-purified rabbit antibody against IFN-γ (IFN-γ), or antibody against IFN-γ pre-incubated with purified recombinant murine IFN-γ (Ag Blocking). Cy3-conjugated anti-rabbit secondary antibody was used. B, Confocal fluorescent images of circumvallate sections stained with control normal goat IgG (Gt IgG), affinity-purified goat antibody against TNF-α (TNF-α), or antibody against TNF-α pre-incubated with purified recombinant murine TNF-α (Ag Blocking). Alexa 488-conjugated anti-goat secondary antibody was used. C, D, Colocalization of IFN-γ (C) or TNF-α (D) immunoreactivity (red) with TrpM5-GFP-positive (green) taste bud cells (arrows). Cy3-conjugated anti-rabbit and Cy5-conjugated anti-goat secondary antibodies were used for IFN-γ and TNF-α immunostaining, respectively. Scale bars, 25 μm.