Influence of eye pigmentation on retinal degeneration in P23H and S334ter mutant rhodopsin transgenic rats
| Autor: | Douglas Yasumura, Jacque L. Duncan, Matthew M. LaVail, Haidong Yang, Robert J. Lowe, Kate M. Daniello, Michael T. Matthes |
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| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Retinal degeneration medicine.medical_specialty Rhodopsin genetic structures Transgene Mutant Retina Rats Sprague-Dawley 03 medical and health sciences Cellular and Molecular Neuroscience 0302 clinical medicine Internal medicine medicine Electroretinography Animals Rats Long-Evans Outer nuclear layer biology Eye Color Chemistry Retinal Degeneration medicine.disease Eye pigmentation eye diseases Sensory Systems Rats Ophthalmology 030104 developmental biology medicine.anatomical_structure Endocrinology Phenotype Mutation 030221 ophthalmology & optometry biology.protein sense organs Rats Transgenic Transgenic Rats Erg Photoreceptor Cells Vertebrate |
| Zdroj: | Experimental eye research. 187 |
| ISSN: | 1096-0007 |
| Popis: | Dark-rearing has been found to slow the rate of retinal degeneration in albino P23H but not S334ter mutant rhodopsin transgenic (Tg) rats. Since eye pigmentation has the same protective slowing effect as dark-rearing in RCS rats, we examined whether eye pigmentation has a comparable slowing effect in the different mutant rhodopsin Tg rats. Different lines of albino P23H and S334ter Tg rats on the Sprague-Dawley (SD) background were bred to Long-Evans (LE) rats to produce pigmented Tg rats. These were compared to albino Tg rats at postnatal days of different ages using the outer nuclear layer (ONL) as a morphological measure of photoreceptor number and electroretinogram (ERG) a- and b-wave amplitudes as a measure of retinal function. When compared to albino P23H rats, pigmented P23H rats had a slower rate of degeneration as measured by greater ONL thicknesses and greater ERG a- and b-wave amplitudes. By contrast, pigmented S334ter rats showed no difference in ONL thicknesses or ERG a- and b-wave amplitudes when compared to their albino equivalents. Thus, degeneration of photoreceptors in P23H Tg rats is slowed by eye pigmentation as measured by ONL thickness, while it is not in the S334ter Tg rats. Eye pigmentation also protects functional changes in ERG a- and b-waves for the P23H lines, but not for the S334ter lines. |
| Databáze: | OpenAIRE |
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