Figure 5

In situ hybridization for Cxcl1 mRNA in the retina following exposure to 24 hours of light damage. A: In sections from dim-reared animals, staining for Cxcl1 was absent. B-D: Retinas exposed to 24 hrs of LD showed staining for Cxcl1 in putative retinal pigment epithelium (RPE) cells (arrowheads) in the superior retina (B-C), and few-to-none in the inferior (D). E-F: Staining for Cxcl1 mRNA was also present in the inner nuclear layer (INL) of superior retina following 24 hrs of LD (E; arrowheads), and mostly absent in inferior retina (F). G-H: Retinas with stain for Cxcl1 mRNA in the INL (red; arrowhead), which was found to co-localize with vimentin-immunolabeled Müller cell processes (green; arrowheads). I-J: Localized Cxcl1 stain in putative RPE cells (red; arrowheads) correlated strongly with immunolabeling for RPE65 (green; arrowheads); Cxcl1 stain appeared to be localized in the nucleus, rather than cytoplasm. C, choroid; INL, inner nuclear layer; IHC, immunohistochemistry; ISH, in situ hybridization ONL, outer nuclear layer; OS, outer segments.