Peer-reviewed veterinary case report
Retinal oxygen use drops in Abyssinian cats with inherited eye disease
By Padnick-Silver, Lissa et al.·Published in Investigative ophthalmology & visual science·2006·Department of Biomedical Engineering, United States·View original on PubMed →
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Original publication title: Retinal oxygenation and oxygen metabolism in Abyssinian cats with a hereditary retinal degeneration.
- Species:
- cat
Plain-English summary
A group of seven adult Abyssinian cats with hereditary retinal degeneration were studied to understand how this condition affects their eye health. The cats showed a progressive decline in the ability of their photoreceptors (light-sensitive cells in the retina) to use oxygen, eventually reaching a point where they could not utilize oxygen at all. Despite this, the inner part of their retinas maintained normal oxygen levels throughout the disease stages. The findings suggest that as the disease worsens, the relationship between the electrical activity in the retina and oxygen use becomes closely linked. Unfortunately, there is no specific treatment mentioned for reversing the degeneration, but understanding these changes can help in managing the condition.
People also search for: Abyssinian cat retinal degeneration symptoms · cat eye problems treatment · hereditary retinal disease in cats
Abstract
PURPOSE: To investigate the effects of a hereditary retinal degeneration on retinal oxygenation and determine whether it is responsible for the severe attenuation of retinal circulation in hereditary photoreceptor degenerations. METHODS: Seven adult Abyssinian cats affected by hereditary retinal degeneration were studied. Oxygen microelectrodes were used to collect spatial profiles of retinal oxygenation in anesthetized animals. A one-dimensional model of oxygen diffusion was fitted to the data to quantify photoreceptor oxygen utilization (Qo(2)). RESULTS: Photoreceptor Qo(2) progressively decreased until it reached zero in the end stage of the disease. Average inner retinal oxygen tension remained within normal limits at all disease stages, despite the observed progressive retinal vessel attenuation. Light affected photoreceptors normally, decreasing Qo(2) by approximately 50% at all stages of the disease. CONCLUSIONS: Loss of photoreceptor metabolism allows choroidal oxygen to reach the inner retina, attenuating the retinal circulation in this animal model of retinitis pigmentosa (RP) and probably also in human RP. As the degeneration progresses, there is a strong relationship between changes in the a-wave of the ERG and changes in rod oxidative metabolism, indicating that these two functional measures change together.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/16877443/