Vitreal delivery of AAV vectored Cnga3 restores cone function in CNGA3-/-/Nrl-/- mice, an all-cone model of CNGA3 achromatopsiaaEuro

Vitreal delivery of AAV vectored Cnga3 restores cone function in CNGA3-/-/Nrl-/- mice, an all-cone model of CNGA3 achromatopsiaaEuro
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AAV载体Cnga3的玻璃体递送可恢复CNGA3-/-/Nrl-/-小鼠的视锥细胞功能,这是CNGA3色盲的全视锥细胞模型

DOI:
10.1093/hmg/ddv114
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发表时间:
2015-07-01
影响因子:
3.5
通讯作者:
Pang, Ji-Jing
Pang, Ji-Jing
中科院分区:
生物学2区
文献类型:
--
作者:
Du, Wei;Tao, Ye;Pang, Ji-Jing

文献摘要

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相似文献

CNGA 3(-/-)/Nrl(-/-)小鼠是具有Cnga 3通道缺陷的视锥细胞显性模型,其部分模拟具有CNGA 3突变的人全色盲2的全视锥细胞中央凹结构。虽然视网膜下(SR)AAV载体施用可以有效地切除视网膜细胞,但是注射诱导的视网膜脱离可以引起视网膜损伤,特别是当SR载体泡包括中央凹时。因此,我们探索了在CNGA 3(-/-)/Nrl(-/-)小鼠中是否可以通过玻璃体内(IVit)递送酪氨酸至苯丙氨酸(Y-F)衣壳突变体AAV 8来拯救视锥功能-结构。我们发现,AAV介导的CNGA 3表达可以在AAV 8(Y 447,733 F)载体的IVit递送后恢复视锥功能和拯救结构。通过恢复视锥细胞介导的视网膜电图(ERG)、视动反应和视锥细胞视蛋白免疫组织化学来评估补救。通过IVit递送在视锥细胞占优势的小鼠模型中证实基因治疗提供了一种潜在的替代载体递送模式,用于安全地转导全色盲患者和影响中心凹功能的其他人类视网膜疾病中的中心凹视锥细胞。
The CNGA3(-/-)/Nrl(-/-) mouse is a cone-dominant model with Cnga3 channel deficiency, which partially mimics the all cone foveal structure of human achromatopsia 2 with CNGA3 mutations. Although subretinal (SR) AAV vector administration can transfect retinal cells efficiently, the injection-induced retinal detachment can cause retinal damage, particularly when SR vector bleb includes the fovea. We therefore explored whether cone function-structure could be rescued in CNGA3(-/-)/Nrl(-/-) mice by intravitreal (IVit) delivery of tyrosine to phenylalanine (Y-F) capsid mutant AAV8. We find that AAV-mediated CNGA3 expression can restore cone function and rescue structure following IVit delivery of AAV8 (Y447, 733F) vector. Rescue was assessed by restoration of the cone-mediated electroretinogram (ERG), optomotor responses, and cone opsin immunohistochemistry. Demonstration of gene therapy in a cone-dominant mouse model by IVit delivery provides a potential alternative vector delivery mode for safely transducing foveal cones in achromatopsia patients and in other human retinal diseases affecting foveal function.