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在TRPV3中复合异合体变体的累积效应导致奥姆斯特德综合征

Ran Mo¹, Xiaoqi Ma², Linghan Hu¹

¹Genetic Skin Disease Center, Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China.

Journal of dermatological science

|November 14, 2024

概括

由于TRPV3基因变异,奥姆斯特德综合征 (OS) 可能是继承性的. 在TRPV3中,复合异质合体功能增益变体会导致OS,它们的综合效应会影响疾病的严重程度.

科学领域:

遗传学和分子生物学
皮肤病学皮肤病学
道病变是一种通道病变.

背景情况:

奥姆斯特德综合征 (OS) 是一种罕见的皮肤疾病,通常以自体主导模式遗传.
它通常是由短暂受体潜在通道尼洛伊德3 (TRPV3) 基因中的功能增益 (GOF) 变异引起的.

研究的目的:

在两个不同寻常的自体逆向遗传模式的病例中研究OS的遗传机制.
识别和描述与OS相关的新型TRPV3变体.

主要方法:

采用下一代测序来识别患者中的TRPV3变异.
利用电生理学补丁技术来分析TRPV3通道活动.
通过发光细胞活力测定来评估细胞活力.

主要成果:

在TRPV3中鉴定出组合异体变异:在一个患者中c.1563G>C (p.W521C) 和c.1376C>T (p.S459L),在另一个患者中c.1773G>C (p.L591F) 和c.2186G>A (p.R729Q).
所有已识别的变体都显示出GOF通道活性,对TRPV3激动剂的敏感性增加和EC50值降低,与临床症状相关.
与野生类型的TRPV3共同感染部分挽救了GOF效应,并且复合异合体变体的细胞显示了中间道活性.

结论:

呈现了奥姆斯特德综合征的两例新病例,由于TRPV3.3中复合异性GOF变体,因自身逆性遗传.
突出了多个TRPV3变异对疾病表型的累积影响.
建议依赖体的离子通道活性测定用于评估OS中TRPV3变异的致病性.

关键词:

奥姆斯特德综合征是什么意思在 TRPV3 中.复合异合体变种的复合异合体变种

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