与外皮发育不良症相关的KREMEN1变异 KREMEN1的复杂形成与DKK1和LRP6并减弱WNT3A反应
Natascha Rosen1, Tess Holling1, Inken Junod1
1Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
The Journal of investigative dermatology
|June 24, 2025
概括
双性KREMEN1变体导致外皮发育不良,导致严重的牙损失和轻微的特征. 新的KREMEN1变种破坏了糖化和WNT通路信号,影响了外皮发育.
科学领域:
- 遗传学 遗传学 是一个
- 发展生物学 发展生物学
- 分子生物学分子生物学
背景情况:
- 皮内膜异位形成障碍是一种影响皮内膜结构的异质性疾病.
- 克雷门1变异与牙生殖和外皮缺陷有关.
- KREMEN1是WNT/β-catenin通路中的一个受体.
研究的目的:
- 在患有小牙和稀疏毛发的患者中报告新型同卵性KREMEN1变异.
- 研究KREMEN1变异对蛋白质糖化和WNT通路信号的功能影响.
主要方法:
- 来自两个家庭的患者的基因分析.
- 在HEK293T细胞中KREMEN1野生型和变体的异位表达.
- 分析蛋白质糖化,DKK1/LRP6复合体的形成,以及患者纤维细胞中的WNT通路活性.
主要成果:
- 确定了两个新型同卵性KREMEN1变体 (c.497G>A; p.(Gly166Asp) 和c.136C>T; p.(Gln46)).
- 克雷门1变种显示N-和O-糖化减少和DKK1和LRP6.6的三元复合体形成受损.
- 患者的纤维细胞表现出改变了WNT通路活性,基底活性更高,对WNT3A的反应减弱.
结论:
- 致病性KREMEN1变异通过受损的糖化和WNT通路放松调节,导致皮外皮发育不良.
- 这些发现扩大了对KREMEN1在人类发展中的作用的理解.
- 克雷门1变种代表了综合征性牙产生的一个重要原因.
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