有针对性的长时间读取cDNA测序揭示了导致视网膜变的新型拼接改变病原体变异,导致视网膜变
Dalila Capasso1, Roberta Zeuli2, Gavin Arno3
1Telethon Institute of Genetics and Medicine, Pozzuoli, Italy; Scuola Superiore Meridionale (SSM, School of Advanced Studies), Genomic and Experimental Medicine Program, Naples, Italy.
HGG advances
|April 19, 2025
概括
有针对性的长读cDNA测序有效地识别了继承性视网膜疾病 (IRDs) 中的拼接改变变异. 这种方法有助于诊断以前无法解释的IRD病例,因为它揭示了NMNAT1.1.等基因中的新型拼接缺陷.
科学领域:
- 遗传学 是一个遗传学.
- 眼科医生 眼科 眼科
- 分子生物学分子生物学
背景情况:
- 剪接改变变体有助于遗传性视网膜疾病 (IRDs) 的遗传性.
- 解释这些变异是具有挑战性的,因为需要对病原性进行功能验证.
- 当前的诊断方法可能无法完全捕捉拼接缺陷.
研究的目的:
- 评估针对性长读cDNA测序 (lrcDNA-seq) 的诊断实用性,用于调查IRD相关的拼接缺陷.
- 为了确定新的拼接改变变异,并揭示无法解释的IRD病例的遗传基础.
主要方法:
- 从受影响个体的血液样本中分离RNA.
- 产生跨越开放的读取框架或候选基因的多个异构体的cDNA扩增子.
- 长读序列的应用,以分析cDNAamplicons的拼接异常.
主要成果:
- 在IRD基因中使用已知的致病性拼接改变变异的lrcDNA-seq方法的验证.
- 在6个以前无法解释的与NMNAT1变异的IRD病例中识别了新的拼接改变变异.
- 在四个受试者中检测到SVA_F逆转移素在NMNAT1mRNA中部分包含,导致过早停止编码子.
结论:
- 向的lrcDNA-seq对于特征拼接缺陷和识别IRD中的新拼接改变变体是有效的.
- 这项技术揭示了六个以前无法解释的IRD受试者的遗传基础.
- lrcDNA-seq的实施有可能提高IRD的诊断率.
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