鉴定了三个家族中的四种TTN变异,其中三个家族具有胎儿秋变形序列
Lihong Fan1, Haibo Li2, Ying Xu2
1Center of Prenatal Diagnosis, Huzhou Maternity & Child Health Care Hospital, No. 2 East Street, Wuxing district, Huzhou, 313000, Zhejiang, China.
BMC medical genomics
|June 27, 2024
概括
在TTN基因中的致病变异可以导致胎儿秋变形序列 (FADS). 这项研究确定了导致FADS的新型TTN变异,证明了它们在递归遗传模式中的产前诊断潜力.
科学领域:
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
- 发展生物学 发展生物学
背景情况:
- 蒂 (TTN) 基因很大,很复杂,与肌肉和心脏疾病相关的变异.
- 在TTN的突变可以导致表型的光谱,往往是早期发病.
- 变异类型和位置影响疾病的严重程度和表现.
研究的目的:
- 在三个不相关的家族中调查胎儿秋变形序列 (FADS) 的遗传基础.
- 识别与FADS相关的新型TTN基因变异.
- 证明TTN变异在产前表型中的作用.
主要方法:
- 整体外基因组测序被用来分析来自FADS的三个家庭的受影响个体.
- 桑格测序证实了已识别的TTN变体.
- 进行RT-PCR分析以评估变异对基因剪接的影响.
主要成果:
- 三个家庭的五个受影响的胎儿携带了一个TTN元转录单独变体 (c.38,876-2 A>C) 以及另一种致病变体.
- 分离分析证实了变异从父母遗传.
- 通过RT-PCR检测发现异常拼接,包括内核199延伸和外核跳转.
结论:
- 在FADS的三个家族中,四种TTN变异被确定为致病性.
- 致病性元转录单独的TTN变种可以导致可识别的产前缺陷.
- TTN变异的递归遗传有助于FADS表型.
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