首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Drusen, choroidal neovascularization, and retinal pigment epithelium dysfunction in SOD1-deficient mice: A model of age-related macular degeneration
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Drusen, choroidal neovascularization, and retinal pigment epithelium dysfunction in SOD1-deficient mice: A model of age-related macular degeneration

机译:缺乏SOD1的小鼠的玻璃疣,脉络膜新生血管形成和视网膜色素上皮功能障碍:年龄相关性黄斑变性的模型

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Oxidative stress has long been linked to the pathogenesis of neurodegenerative diseases; however, whether it is a cause or merely a consequence of the degenerative process is still unknown. We show that mice deficient in Cu, Zn-superoxide dismutase (SOD1) have features typical of age-related macular degeneration in humans. Investigations of senescent Sod1(-/-) mice of different ages showed that the older animals had drusen, thickened Bruch's membrane, and choroidal neovascularization. The number of drusen increased with age, and exposure of young Sod1(-/-) mice to excess light induced drusen. The retinal pigment epithelial cells of Sod1(-/-) mice showed oxidative damage, and their beta-catenin-mediated cellular integrity was disrupted, suggesting that oxidative stress may affect the junctional proteins necessary for the barrier integrity of the retinal pigment epithelium. These observations strongly suggest that oxidative stress may play a causative role in age-related retinal degeneration, and our findings provide evidence for the free radical theory of aging. In addition, these results demonstrate that the Sod1(-/-) mouse is a valuable animal model to study human age-related macular degeneration.
机译:长期以来,氧化应激与神经退行性疾病的发病机制有关。然而,究竟是变质过程的原因还是仅是其结果仍然未知。我们表明,缺乏铜,锌超氧化物歧化酶(SOD1)的小鼠具有人类年龄相关性黄斑变性的典型特征。对不同年龄的Sod1(-/-)衰老小鼠进行的研究表明,年龄较大的动物患有玻璃疣,布鲁赫膜增厚和脉络膜新生血管。玻璃疣的数量随年龄增长而增加,并且年轻的Sod1(-/-)小鼠暴露于过量的光诱发玻璃疣。 Sod1(-/-)小鼠的视网膜色素上皮细胞显示出氧化损伤,并且它们的β-catenin介导的细胞完整性被破坏,表明氧化应激可能影响视网膜色素上皮屏障完整性所必需的连接蛋白。这些观察结果强烈表明,氧化应激可能在与年龄有关的视网膜变性中起重要作用,我们的发现为自由基衰老理论提供了证据。此外,这些结果表明,Sod1(-/-)小鼠是研究人类年龄相关性黄斑变性的有价值的动物模型。

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