Figure 1. The expression of peroxisome proliferator-activated receptor γ (PPARγ). The expression of PPARγ in the normal cornea (A) and in the alkali-burned cornea (B–D; A, C: PPARγ stain, B: naphthol AS-D chloroacetate esterase stain, D: ED1 stain, scale bar: 50 μm). In the normal rat cornea (A), PPARγ was expressed mainly on the epithelial basement cells. In the alkali-burned cornea on day 2, serial sections treated with naphthol AS-D chloroacetate esterase (B), PPARγ (C), and ED1 (D) stains showed that PPARγ was expressed on infiltrating naphthol AS-D chloroacetate esterase-positive neutrophils (red arrows) and ED1-positive macrophages (blue arrows).