Morphology changes of fundus and retinas of KMush/ush and control mice.

(A-B), Fundus photography performed at P21. KMush/ush mice (B) exhibited severe attenuation of retinal vessels and waxy pallor of the optic discs in comparison with controls (A). Atrophy of the retina and choroidal vessels were clearly visible. (C-J), Retinal sections of KMush/ush and control mice. (G-J), Retinas of control mice at P7 (G), P14 (H), P21 (I) and P56 (J). Retinas of Retinas of KMush/ush mice at P7 (C) had no differences in the thickness and structure of each retinal layer compared with control mice. At P14 (D), the ONL cells and other layers of retina including inner nuclear layer were attenuated. At P21 (E) and P56 (F) the ONL and the entire retinas became even thinner. (K), Plot of the thickness of ONL, measured as numbers of photoreceptor nuclei per column. Results are presented as means ± SD. Data were analyzed with one-way ANOVA. **, P < 0.001. ONL, outer nuclear layer; INL, inner nuclear layer; GCL, ganglion cell layer. Scale bar, 50 μm.