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案例报告:LSS和TSPEAR基因中的复合异合体变异导致14型低皮质症,并与14型外皮性形症复杂
Yonglong Xu1,2, Dingquan Yang2, Ying Xie1,2
1Beijing University of Chinese Medicine, Beijing, China.
Frontiers in medicine
|February 5, 2026
概括
这项研究报告了一名患有14型低三症 (HYPT14) 和14型外皮发育不良症 (ED14) 的儿童,在LSS中呈现复合异体变体,在TSPEAR中呈现异体变体. 这些遗传发现扩大了对外皮异常的理解,并表明了潜在的基因遗传.
科学领域:
- 遗传学和分子生物学
- 皮肤病学 皮肤病学
- 临床医学 临床医学
背景情况:
- 14型低皮质症 (HYPT14) 和14型外皮发育不良症 (ED14) 是一种罕见的遗传性疾病.
- 了解这些疾病的遗传基础对于诊断和管理至关重要.
- 在外皮发育中LSS和TSPEAR基因的作用是正在进行的研究领域.
研究的目的:
- 详细说明患有HYPT14和ED14的儿童的临床和遗传发现.
- 为了研究LSS中的复合异合体变体和TSPEAR中的异合体变体.
- 探索并发变异的潜在表型影响,并为诊断和机制研究提供信息.
主要方法:
- 从受影响的儿童和家庭收集临床数据.
- 在外周血液样本中进行变异查的下一代测序.
- 桑格测序用于隔离分析和文献综述,用于表型背景.
主要成果:
- 这名儿童在LSS中呈现复合异合体变异 (c.1025T>G;p.(Ile342Ser) 和c.3G>A) 以及TSPEAR中的异合体变异 (c.872G>A;p.(Arg291Gln)).
- 根据ACMG标准,所有确定的变异都被归类为具有不确定的意义的变异 (VUS).
- 患者的表型与HYPT14和ED14报告的特征重叠,表明潜在的基因型-表型相关性.
结论:
- 同时存在的LSS和TSPEAR变体可能会导致ED14的HYPT14复杂表型.
- 该病例代表了首次涉及LSS和TSPEAR的二基遗传案例,扩大了已知的临床谱.
- 这些发现支持对患有先天性低皮质症和外皮特征的儿童进行更广泛的基因测试,同时考虑潜在的寡原性影响.
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