C20D3-Vitamin A Prevents Retinal Pigment Epithelium Atrophic Changes in a Mouse Model.

C20D3-Vitamin A Prevents Retinal Pigment Epithelium Atrophic Changes in a Mouse Model.
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DOI:
10.1167/tvst.10.14.8
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发表时间:
2021-12-01
影响因子:
3
通讯作者:
Washington I
Washington I
中科院分区:
医学3区
文献类型:
--
作者:
Zhang D;Robinson K;Washington I

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本研究旨在评估维生素 A 二聚化对视网膜色素上皮 (RPE) 萎缩变化的影响。不可逆性失明的主要原因,包括 Stargardt 病和年龄相关性黄斑变性 (AMD),都是由于 RPE 萎缩性变化而发生的。 RPE 萎缩性变化的原因尚不清楚。在维生素 A 循环期间,维生素 A 二聚化,导致 RPE 中产生维生素 A 循环副产物,例如维生素 A 二聚体。为了研究维生素 A 二聚化对 RPE 萎缩变化的影响,我们使用了维生素 A 二聚化加速的啮齿动物模型、Abca4−/−/Rdh8−/− 小鼠和维生素 A 类似物 C20D3-维生素 A 来选择性地改善维生素 A 二聚化的加速速率。我们发现,用 C20D3-维生素 A 改善维生素 A 二聚化率可以减轻在最常见的视网膜退行性疾病的前驱期观察到的病理变化,包括眼底自发荧光变化、暗适应延迟和标志性 RPE 萎缩变化。数据表明,维生素 A 循环期间维生素 A 的二聚化足以单独引起先决条件的 RPE 萎缩性变化,而这种变化被认为是造成不可逆性失明的主要原因,并且用 C20D3-维生素 A 纠正二聚化率可能足以防止 RPE 萎缩性变化。用维生素 A 类似物 C20D3-维生素 A 预防维生素 A 的二聚化可能足以改变最常见的失明形式的临床病程,包括斯塔加特病和年龄相关性黄斑变性 (AMD)。
This study aimed to evaluate the contribution of vitamin A dimerization to retinal pigment epithelium (RPE) atrophic changes. Leading causes of irreversible blindness, including Stargardt disease and age-related macular degeneration (AMD), occur as a result of atrophic changes in RPE. The cause of the RPE atrophic changes is not apparent. During the vitamin A cycle, vitamin A dimerizes, leading to vitamin A cycle byproducts, such as vitamin A dimers, in the RPE. To study the consequence of vitamin A dimerization to RPE atrophic changes, we used a rodent model with accelerated vitamin A dimerization, Abca4−/−/Rdh8−/− mice, and the vitamin A analog C20D3-vitamin A to selectively ameliorate the accelerated rate of vitamin A dimerization. We show that ameliorating the rate of vitamin A dimerization with C20D3-vitamin A mitigates pathological changes observed in the prodromal phase of the most prevalent retinal degenerative diseases, including fundus autofluorescence changes, dark adaptation delays, and signature RPE atrophic changes. Data demonstrate that the dimerization of vitamin A during the vitamin A cycle is sufficient alone to cause the prerequisite RPE atrophic changes thought to be responsible for the leading causes of irreversible blindness and that correcting the dimerization rate with C20D3-vitamin A may be sufficient to prevent the RPE atrophic changes. Preventing the dimerization of vitamin A with the vitamin A analog C20D3-vitamin A may be sufficient to alter the clinical course of the most prevalent forms of blindness, including Stargardt disease and age-related macular degeneration (AMD).
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