罕见的基因组拷贝数变异意味着双主动脉的新候选基因
Steven G Carlisle1, Hasan Albasha2, Hector I Michelena3
1University of Texas Health Science Center at Houston, Houston, Texas, United States of America.
PloS one
|September 6, 2024
概括
罕见的副本数变异 (CNVs) 与早期发病的双主动脉 (BAV) 疾病有关. 这些遗传变化,特别是涉及GATA4和DSCAM,可能在BAV发育和相关的大动脉并发症中发挥作用.
科学领域:
- 遗传学 遗传学 是一个
- 心脏病学 心脏病学
- 发展生物学 发展生物学
背景情况:
- 双主动脉 (BAV) 是最常见的先天性心脏缺陷,导致显著的门疾病和主动脉动脉瘤.
- BAV并发症的范围从早期发病 (EBAV) 到零星晚期发病.
- 罕见的基因组复制数变异 (CNVs) 被怀疑是BAV和胸前动脉动脉瘤的贡献者.
研究的目的:
- 在早期发病的BAV (EBAV) 试验中确定罕见的CNV的频率和遗传含量.
- 调查 CNV 与 BAV 和胸前大动脉动脉瘤的关联.
- 通过 CNV 分析,识别涉及 BAV 病变的特定基因.
主要方法:
- 对272个EBAV试验对象进行了全基因组SNP微阵列分析.
- 三种CNV检测算法 (cnvPartition,PennCNV,QuantiSNP) 用于数据分析.
- 这些发现被复制到一个更大的队列 (n=5040) 的晚发BAV患者中,并与对照基因型进行了比较.
主要成果:
- 在EBAV试验中发现了三种大型罕见的CNV (对照<1:1000).
- 已知BAV相关基因交叉的CNVs的显著负担在病例中被观察到.
- 涉及GATA4和DSCAM的CNV在EBAV病例中被丰富,在其他数据集中反复出现,并与家族中的疾病分离.
结论:
- 在9%的EBAV病例中发现了潜在的致病性CNV.
- 候选基因在确定位置的变化,包括GATA4和DSCAM,都与BAV.的发病有关.
- 这项研究强调了罕见的CNVs在早期发病的BAV疾病的遗传病因学中的作用.
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