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RP9重新审视;RP9 p.(H137L) 仍然是主导拼接因子-色素视网膜炎的可能原因
Leon Chang1, James A Poulter1, Andrew R Webster2
1Leeds Institute of Medical Research, School of Medicine, University of Leeds, Leeds, UK.
European journal of human genetics : EJHG
|October 23, 2025
概括
RP9 p.(H137L) 变种与自身主导性视网膜炎 (adRP) 密切相关,通过基因组测序和患者队列分析得到证实. 这一发现澄清了先前在一个大家庭中引起adRP的原因.
科学领域:
- 遗传学和基因组学 遗传学和基因组学
- 眼科医生 眼科 眼科
- 分子生物学分子生物学
背景情况:
- 自体主导性视网膜色素炎 (adRP) 与前mRNA处理因子的变异有关.
- 编码剪接因子的RP9基因有两种已报告的变异 (p.(H137L) 和p.(D170G)) 之前被认为是adRP的原因.
- 人们担心这些变体可能是伪基因的工件,没有进一步的致病变体被发现.
研究的目的:
- 重新评估之前报告的RP9变异的致病性,特别是p.137L和p.170G,在自身主导性视网膜炎 (adRP).
- 确认这些变异的基因来源,并评估它们在视网膜色素炎 (RP) 和杆状缩症 (RCD) 患者队列中的患病率.
- 在一个大型的多代adRP家族中确定RP9p.
主要方法:
- 来自一个多代RP9链接家族的两个成员的基因组测序.
- 短和长读序列的对齐,以确认RP9基因中的变异位置与RP9P伪基因之间的对比.
- 从利兹队列和英国10万个基因组项目 (100kGP) 中对1961年RP/RCD病例的查,以检测p.
主要成果:
- 基因组测序证实p.(H137L) 变异位于RP9基因中,而不是伪基因.
- 在1962年RP/RCD试验中,p.(H137L) 变种在5个RP/RCD试验中被发现,并且不在gnomAD中,在RP病例中显示出显著的丰富.
- 证实p.(D170G) 变体是基因衍生的,但在众多对照组和gnomAD/Biobank个体中发现,这表明它是非致病性的.
结论:
- RP9 p.(H137L) 变种与视网膜色素炎 (RP) 密切相关,是研究的多代家族中adRP的可能原因.
- 长读测序确定了p.(H137L) 变体作为英国的创始基因.
- 由于RP9 p. ((D170G) 变种存在于对照种群中,因此被认为是非致病性.
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