Figure 3.

Hematoxylin and eosin staining of retinal sections (thickness, 5 µm) obtained from mice at 7 days after the intravitreal injection of N-methyl-d-aspartate (NMDA). Representative photographs showing non-treated normal retina (A), NMDA-treated, vehicle-treated retina (B) and NMDA-treated, propolis-treated retina (C). Propolis (PW; extract with water) at 100 mg kg⁻¹ (0.1 ml per 10 g) was intraperitoneally administered at 48 h, 24 h and 60 min before and at 6 h after the NMDA injection (40 nmol per eye). Treatment with propolis limited the damage to retinal ganglion cells (arrows) and to the IPL (vertical bars) induced by the NMDA injection. Also see Table 2. Vertical bars show thickness of plexiform layer. Horizontal bar represents 25 µm.