Liver tissues were fixed in 4% (v/v) paraformaldehyde (PFA) in PBS and embedded with paraffin, which were then sliced into tissue sections (4 μM) and mounted on glass slides. These tissue slides were stained with goat anti-IL-1β antibody (1:100, R&D Systems) overnight at 4°C after a 20 min wash with 3% H2O2 and 30 min blocking with 10% serum and then probed with anti-goat Ig-G second antibody labeled with HRP according to the protocols described previously [32 (link), 40 (link)]. Negative controls were prepared without the primary antibodies. The area percentage of the positive staining were calculated in Image Pro Plus 6.0 software.
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