Cone Photoreceptor Loss in Light-Damaged Albino Rats.

Cone Photoreceptor Loss in Light-Damaged Albino Rats.
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轻受损的白化病大鼠中的锥形光感受器损失。

DOI:
10.3390/ijms23073978
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发表时间:
2022-04-02
影响因子:
5.6
通讯作者:
Kraft TW
Kraft TW
中科院分区:
生物学2区
文献类型:
--
作者:
Benthal MC;McKeown AS;Kraft TW

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我们研究了视网膜变性光损伤(LD)模型中锥体驱动视力下降的病因。为了诱导缓慢、中度的变性,白化大鼠接受了 10 天的低强度光照。视网膜电图用于评估 LD 和对照大鼠视杆细胞和视锥细胞驱动的视网膜功能的生理功能。靶向视锥细胞抑制蛋白的免疫组织化学可以定量视锥细胞密度并比较功能下降。光感受器损失通过光学相干断层扫描和组织学观察到的外核层厚度减少来量化。 LD大鼠表现出视杆细胞和视锥细胞驱动功能下降,但在停止光照30天后部分恢复。此外,与对照大鼠相比,LD大鼠视网膜中央区域的视锥细胞密度降低。我们的结果表明,光损伤引起的视锥驱动视觉功能的丧失至少部分是由于视锥光感受器的死亡。
We investigated the etiology of decreased cone-driven vision in a light damage (LD) model of retinal degeneration. To induce slow, moderate degeneration, albino rats underwent low-intensity light exposure for 10 days. Electroretinography was utilized to assess physiologic function of the rod- and cone-driven retinal function in LD and control rats. Immunohistochemistry targeting cone arrestin allowed for quantification of cone density and for comparison of the decline in function. Photoreceptor loss was quantified by outer nuclear layer thickness decreases, as observed by optical coherence tomography and histology. The LD rats showed decreased rod- and cone-driven function with partial recovery 30 days after cessation of light exposure. In addition, LD rats showed decreased cone photoreceptor densities in the central retinal region compared to control rats. Our results demonstrate that the loss of cone-driven visual function induced by light damage is at least partially due to the death of cone photoreceptors.
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