| First Author | Venturini G | Year | 2021 |
| Journal | Sci Rep | Volume | 11 |
| Issue | 1 | Pages | 19032 |
| PubMed ID | 34561487 | Mgi Jnum | J:311134 |
| Mgi Id | MGI:6764167 | Doi | 10.1038/s41598-021-98271-7 |
| Citation | Venturini G, et al. (2021) In vivo analysis of onset and progression of retinal degeneration in the Nr2e3(rd7/rd7) mouse model of enhanced S-cone sensitivity syndrome. Sci Rep 11(1):19032 |
| abstractText | The photoreceptor-specific nuclear receptor Nr2e3 is not expressed in Nr2e3(rd7/rd7) mice, a mouse model of the recessively inherited retinal degeneration enhanced S-cone sensitivity syndrome (ESCS). We characterized in detail C57BL/6J Nr2e3(rd7/rd7) mice in vivo by fundus photography, optical coherence tomography and fluorescein angiography and, post mortem, by histology and immunohistochemistry. White retinal spots and so-called 'rosettes' first appear at postnatal day (P) 12 in the dorsal retina and reach maximal expansion at P21. The highest density in 'rosettes' is observed within a region located between 100 and 350 microM from the optic nerve head. 'Rosettes' disappear between 9 to 12 months. Non-apoptotic cell death markers are detected during the slow photoreceptor degeneration, at a rate of an approximately 3% reduction of outer nuclear layer thickness per month, as observed from 7 to 31 months of age. In vivo analysis of Nr2e3(rd7/rd7) Cx3cr1(gfp/+) retinas identified microglial cells within 'rosettes' from P21 on. Subretinal macrophages were observed in vivo and by confocal microscopy earliest in 12-months-old Nr2e3(rd7/rd7) retinas. At P21, S-opsin expression and the number of S-opsin expressing dorsal cones was increased. The dorso-ventral M-cone gradient was present in Nr2e3(rd7/rd7) retinas, but M-opsin expression and M-opsin expressing cones were decreased. Retinal vasculature was normal. |
