| First Author | Smith SB | Year | 1993 |
| Journal | Curr Eye Res | Volume | 12 |
| Issue | 8 | Pages | 711-7 |
| PubMed ID | 8222731 | Mgi Jnum | J:15470 |
| Mgi Id | MGI:63591 | Doi | 10.3109/02713689308995766 |
| Citation | Smith SB, et al. (1993) Opsin synthesis in the C57BL/6-mivit/mivit mouse model of retinal degeneration. Curr Eye Res 12(8):711-7 |
| abstractText | The capacity of photoreceptor cells to synthesize opsin was evaluated in a newly-described mouse model of retinal degeneration, the C57BL/6-mivit/mivit. The mivit/mivit mouse loses photoreceptor cells at a rate of about one row per month beginning at 8 weeks, ROS are severely disrupted at 4 months, RPE is unevenly pigmented. Retinas of affected and control mice ages 4, 6, 8, 12, 16, 20, 24, 28, 32 and 52 weeks were incubated for 2 hours in medium containing [3H] leucine. Homogenates of retina samples were subjected to SDS-PAGE using disc gels. The gels were sliced and counted by scintillation. The incorporation of [3H] leucine into opsin was compared with its incorporation into other retinal proteins. During the early time points studied, mivit/mivit retinas incorporated proportionately similar amounts of [3H] leucine into opsin versus other retinal proteins as did controls. At 12 weeks, the percentage was about 80% and it continued to decline over the succeeding weeks studied. By 1 year, the proportion of leucine incorporated into opsin versus other proteins was only about 23% the amount incorporated in controls. The results of the present study suggest that the mivit/mivit photoreceptor cells are able to synthesize opsin and the gradual decline in synthetic ability follows the gradual loss of cells and is not correlated with the disruption of ROS. |
