影响EYS假定促进体的非编码单核酸和结构变异会导致自身逆性视网膜炎色素菌
Tamar Hayman1, Shai Ovadia2, Jaya Krishnan3
1Division of Ophthalmology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel.
概括
通过影响基因表达,EYS基因促进体的变异会导致自身逆性视网膜色素炎 (RP). 这些遗传变化会影响转录因子的结合和翻译,从而影响RP患者的疾病严重程度.
科学领域:
- 遗传学 遗传学 是一个
- 眼科医生 眼科 眼科
- 分子生物学分子生物学
背景情况:
- 未翻译的基因组区域包含影响基因表达的致病变体.
- 自体逆性视网膜炎色素炎 (RP) 可能是非编码DNA突变的结果.
- EYS基因与RP有关,但其调节区域的变异不明.
研究的目的:
- 描述EYS基因5'-未翻译区域 (5'-UTR) 中变异的致病作用.
- 调查这些变异导致自体逆向RP的分子机制.
- 在患有EYS相关的RP的患者中,将基因型与视觉功能相关联.
主要方法:
- 使用基因面板,桑格测序,外基因组测序和基因组测序进行变异选.
- 通过电泳运动转移试验 (EMSA) 进行功能验证,以评估转录因子结合.
- 路西法酶记者测定量化基因表达变化并评估转录因子过度表达的影响.
主要成果:
- 在阿拉伯穆斯林家庭中发现了一种5'非编码EYS变异 (c.-453G>T) 和5'UTR中的结构变异.
- 欧洲安全和安全管理局 (EMSA) 证明,c.-453G>T和相关变体 (c.-454G>T) 改变了与EYS促进体结合的转录因子.
- 路西法酶测定揭示了变体对EYS表达的明显影响,受特定转录因子 (CRX,OTX2) 的影响,并影响了翻译启动.
- 与零EYS变体相比,患有c.-453G>T变体的患者表现出更好的视觉功能.
结论:
- 在EYS促进体中,单核酸和结构变异是导致自体逆向RP的原因.
- 这些变体通过双重机制发挥病原性:改变转录因子结合并影响上游开放阅读框架 (uORF).
- 鉴定到的变异提供了关于EYS相关的RP的基因型-表型相关性的见解.
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