在诊断上未解决的埃勒斯-丹洛斯综合征的遗传复杂性
Anthony M Vandersteen1,2,3, Ruwan A Weerakkody3,4,5, David A Parry3
1Maritime Medical Genetics Service, IWK Health Centre, Halifax, Nova Scotia, Canada tim.aitman@ed.ac.uk anthony.vandersteen@dal.ca.
Journal of medical genetics
|October 9, 2023
概括
整体外基因组测序在埃勒斯-丹洛斯综合征 (EDS) 和相关疾病中发现了致病变体,突出显示了它对复杂病例的临床实用性. 进一步的分析表明,新型候选基因用于高移动性EDS (hEDS) 和遗传性胸前大动脉疾病 (HTAD).
科学领域:
- 遗传学 是一个遗传学.
- 医学遗传学 医学遗传学
- 分子生物学分子生物学
背景情况:
- 埃勒斯-丹洛斯综合征 (EDS) 是一种具有13个亚型的遗传性结缔组织疾病,但高移动性EDS (hEDS) 的遗传原因尚不清楚.
- 2017年的鼻科重新分类EDS,强调复杂病例需要基因诊断.
研究的目的:
- 调查埃勒斯-丹洛斯综合征 (EDS) 的遗传基础,特别是高移动性EDS (hEDS),使用整个外体序列 (WES).
- 在未被诊断的复杂EDS患者中识别致病变体和新型候选基因.
主要方法:
- 在174名缺乏遗传诊断的EDS患者身上进行了整体外体序列测序 (WES).
- 过的WES数据被分析为已知的EDS/Loeys-Dietz (LDS) 基因和新型位置.
- 基因负担分析是使用来自阿文长度研究父母和儿童 (ALSPAC) 的对照数据进行的.
主要成果:
- 在已知的EDS和LDS基因中发现了异构的致病性或可能致病性变体.
- 在与EDS,LDS和遗传性胸前大动脉疾病 (HTAD) 相关的基因中发现了多种不确定的变异.
- 遗传负担分析表明EDS和HTAD的新基因位点,在非关联基因中具有生物学可信的变异.
结论:
- 基于大型面板的测序和WES对于诊断复杂的EDS,区分亚型,LDS和相关综合征是临床上有用的.
- 扩展基因板和WES是复杂EDS诊断的宝贵工具,可以识别标准测试无法检测到的变异.
- 这些发现支持EDS复杂的遗传结构,并为hEDS和HTAD提出了新的候选基因和途径.
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