一个TMEM260双边删除的基础是动脉关节
Yumi Enomoto1, Takuya Naruto1, Jun Mitsui2
1Clinical Research Institute, Kanagawa Children's Medical Center, Yokohama, Japan.
Molecular syndromology
|December 11, 2025
概括
在一个日本婴儿中,TMEM260基因的新型同卵性缺失导致了家族性动脉断裂 (TA). 这种在日本人口中很常见的大量删除突出了TMEM260作为TA的重要遗传因素.
科学领域:
- 遗传学 是一个遗传学.
- 心血管生物学 心血管生物学
- 发展生物学 发展生物学
背景情况:
- 动脉 (TA) 是一种严重的先天性心脏缺陷,其特点是单一的腹腔外流通道.
- TMEM260基因中的双变异与结构性心脏缺陷和异常综合征 (SHDRA) 相关,包括TA.
- 之前的研究在东亚和阿什基纳兹犹太人口中确定了创始人变体,但基因型-表型相关性需要进一步澄清.
研究的目的:
- 为了研究一个日本家庭的家族性动脉的遗传基础.
- 描述一个新的TMEM260双基结构变异.
- 评估这种变种在日本人口中的频率和重要性.
主要方法:
- 在产前通过超声波诊断TA.
- 临床管理和结果跟踪受影响的婴儿.
- 全基因组测序和分析TMEM260第6和第7个特异体中的同卵性缺失.
- 使用ToMMo 8.3K JPN-SV数据集进行结构变异分析.
主要成果:
- 一名男性婴儿患有家族性TA,他的妹妹也患有TA,出现心力衰竭,并在53天后去世.
- 基因分析显示,TMEM260 (外因子6-7) 中的一种同胞性7,066-bp删除,是从异胞体父母遗传的.
- 这种特定的删除在日本人群中被发现具有显著的等位基因频率 (0.00173).
结论:
- 这是第一个报告的家族性TA病例,该病例是由TMEM260.0中的双基结构变异引起的.
- 鉴定到的TMEM260删除代表了日本人口中TA的重大遗传原因.
- 在TA的遗传诊断中,该变异应与先前识别的TMEM260突变一起考虑.
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