To detect infiltrating macrophages, kidney sections were incubated with anti-galectin3 (Mac2, M3/38, BioLegend, San Diego, CA) antibody overnight at 4 °C, and then incubated with horseradish peroxidase (HRP)-conjugated anti-rat IgG for 60 min at room temperature. Development was performed with NovaRED (vector laboratories), counterstained with hematoxylin, and dehydrated.