Department of Pediatric Genetics, Hacettepe University, Faculty of Medicine, Ankara, Turkey.
Department of Pediatric Genetics, Hacettepe University, Faculty of Medicine, Ankara, Turkey.
Eur J Med Genet. 2024 Apr;68:104911. doi: 10.1016/j.ejmg.2024.104911. Epub 2024 Jan 26.
TP63-related disdorders broadly involve varying combinations of ectodermal dysplasia (sparse hair, hypohydrosis, tooth abnormalities, nail dysplasia), cleft lip/palate, acromelic malformation, split-hand/foot malformation/syndactyly, ankyloblepharon filiforme adnatum, lacrimal duct obstruction, hypopigmentation, and hypoplastic breasts and/or nipples. TP63-related disorders are associated with heterozygous pathogenic variants in TP63 and include seven overlapping phenotypes; Ankyloblepharon-ectodermal defects-cleft lip/palate syndrome (AEC), Ectrodactyly-ectodermal dysplasia-cleft lip/palate syndrome 3 (EEC3), Limb-mammary syndrome (LMS), Acro-dermo-ungual-lacrimal-tooth syndrome (ADULT), Rapp-Hodgkin syndrome (RHS), Split-hand/foot malformation 4 (SHFM4), and Orofacial cleft 8. We report on five unrelated families with 8 affected individuals in which the probands presented with varying combinations of ectodermal dysplasia, cleft lip/palate, split-hand/foot malformation, lacrimal duct obstruction, and ankyloblepharon filiforme adnatum. The clinical diagnosis involved AEC syndrome (2 patients), EEC3 syndrome (2 patients), and a yet hitherto unclassified TP63-related disorder. Sanger sequence analysis of the TP63 gene was performed revealing five different variants among which four were novel and three were de novo. The identificated TP63 variants co-segregated with the other affected individuals in the families. The abnormalities of ectoderm derived structures including hair, nails, sweat glands, and teeth should alert the physician to the possibility of TP63-related disorders particularly in the presence of orofacial clefting.
TP63 相关疾病广泛涉及外胚层发育不良(稀疏的头发、少汗、牙齿异常、指甲发育不良)、唇腭裂、肢端畸形、并指/并趾畸形、丝状并连睑、泪道阻塞、色素减退以及乳房和/或乳头发育不良等不同组合。TP63 相关疾病与 TP63 杂合致病性变异相关,包括七种重叠表型;睑连合-外胚层缺陷-唇腭裂综合征(AEC)、并指-外胚层发育不良-唇腭裂综合征 3 型(EEC3)、肢体-乳腺-牙综合征(LMS)、肢端-皮肤-指甲-泪腺综合征(ADULT)、Rapp-Hodgkin 综合征(RHS)、并指-短掌畸形 4 型(SHFM4)和口面裂 8 型。本研究报道了五个无关联家系,共 8 名受累个体,其临床表现为外胚层发育不良、唇腭裂、并指/并趾畸形、泪道阻塞和丝状并连睑等不同组合。临床诊断包括 AEC 综合征(2 例)、EEC3 综合征(2 例)和一种尚未分类的 TP63 相关疾病。对 TP63 基因进行 Sanger 测序分析,发现了 5 种不同的变异,其中 4 种为新发现的,3 种为新生变异。鉴定的 TP63 变异与家系中其他受累个体共分离。包括毛发、指甲、汗腺和牙齿在内的外胚层衍生结构的异常应提醒医生注意可能存在 TP63 相关疾病,特别是存在唇腭裂时。
1993
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