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在非人类灵长类动物中,患有PDE6C形疾病的疾病的发病和进展
Monica Ardon1, Lily Nguyen1, Rui Chen2,3
1Department of Ophthalmology & Vision Science, School of Medicine, University of California Davis, Sacramento, California, United States.
Investigative ophthalmology & visual science
|December 6, 2024
概括
带有PDE6C突变的 rhesus从婴儿时期就表现出缺席的形功能,随着时间的推移可能发生退化. 异构体的视力正常,类似于人类色斑症患者的视力.
科学领域:
- 眼科医生 眼科 眼科
- 遗传学 遗传学 是一个
- 灵长类动物模型
背景情况:
- 加利福尼亚国家灵长类动物研究中心正在研究具有特定PDE6C突变 (R565Q) 的 rhesus.
- 这种突变会导致类似于人类PDE6C染色失调的形疾病.
研究的目的:
- 为了全面描述PDE6C的表型.
- 为了确定形表型的发病和进展.
- 评估异构卵是否表现出中间的表型,以及杆功能是否随着时间的推移而下降.
主要方法:
- 对光谱域光学连贯性断层扫描 (SD-OCT), fundus 自流光 (FAF) 和电网膜扫描 (ERG) 的分析.
- 从51只 (年龄在0.25至16岁之间) 收集的数据.
- 随着时间的推移,视网膜层和光受体功能的定量比较.
主要成果:
- 与野生类型相比,homozygotes在3个月内没有表现出状反应,并且减少了状外核层 (ONL) 厚度.
- 在4年的时间里,在成年同卵性成体中没有观察到视网膜层厚度的显著变化.
- 形ONL厚度的减少表明,形随着年龄的增长而慢慢退化;在最古老的同卵细胞中,棒功能下降. 异胞体无法与野生类型区分.
结论:
- 的PDE6C异构体在表型上是正常的,反映了人类的载体.
- 从婴儿期开始,存在缺少形功能和减少形ONL厚度的同胞类动物.
- 预示着渐进的形变性,潜在的黄斑缩和晚期的棒功能障碍.
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