显性营养不良性表皮松解症和孤立遗传性指甲紊乱家族的诊断难题:父系COL7A1基因突变和母系RSPO4基因变异的染色体嵌合。

IF 3.7 4区 医学 Q1 DERMATOLOGY Clinical and Experimental Dermatology Pub Date : 2024-10-24 DOI:10.1093/ced/llae215
Ayşe Öktem, Berna Özaydın, Kaan Gündüz, Ezgi Gökpınar İli, Hatice Şanlı, İbrahim Kaplan, Nüket Yürür Kutlay
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引用次数: 0

摘要

萎缩性表皮松解症(DEB)早已被认为是一种众所周知的遗传性皮肤病,由 COL7A1 基因致病变体引起。与 RSPO4 基因突变相关的孤立性无趾畸形是最近描述的一种非综合征常染色体隐性遗传病。在这个家族中,一名 13 岁的女孩出现了严重的表皮松解症症状。家族病史显示,其兄弟姐妹的症状较轻但相似,母亲和母系亲属的所有指甲均无趾甲。父亲没有任何 DEB 的症状。基因检测显示,该患者及其受影响的兄弟姐妹的COL7A1(NM_000094.4)基因中存在c.6127G>A(p.Gly2043Arg)杂合子变异。在母亲或父亲体内均未检测到该变异,因此需要对父母的嵌合情况进行调查。在精子样本中检测到该变异体表明存在父系嵌合现象。此外,因怀疑患有非综合征性孤立性无趾甲,对母亲及其两个患病姐妹的 RSPO4 基因(NM_001029871.4)进行了测序,发现了同源的 c.79+1G>A 变异。母亲的孤立性指甲病最初被认为是 DDEB 纯甲亚型的结果,而孩子们的 DEB 则遗传自母亲。然而,进一步的临床和遗传学调查显示,患者及其兄弟姐妹的病症源于父亲的性染色体嵌合,而母亲的指甲表型是一种独立的偶发病症。本报告旨在为类似病例提供一个范例,并强调在全面病史的指导下进行详细遗传分析以得出诊断结果的重要性。
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Diagnostic challenges in a family with dominant dystrophic epidermolysis bullosa and isolated hereditary nail disorder: paternal gonosomal mosaicism for COL7A1 variant and maternal RSPO4 variant.
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来源期刊
CiteScore
3.20
自引率
2.40%
发文量
389
审稿时长
3-8 weeks
期刊介绍: Clinical and Experimental Dermatology (CED) is a unique provider of relevant and educational material for practising clinicians and dermatological researchers. We support continuing professional development (CPD) of dermatology specialists to advance the understanding, management and treatment of skin disease in order to improve patient outcomes.
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