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家庭NSD1 异构3删除与表型和表观遗传变异性相关

Sunwoo Liv Lee¹, Alison Foster^2,3, Dalit May¹

¹Department of Genomic Medicine, University of Cambridge, Cambridge CB2 0QQ, UK.

|October 29, 2025

概括

一种罕见的家族性NSD1删除导致了轻度的索托斯综合征,症状有所变化. DNA甲基化分析揭示了一个明显的模式,在较轻的病例中不那么明显,有助于理解染色质乱.

科学领域:

遗传学和表观遗传学
发展生物学发展生物学
分子生物学分子生物学

背景情况:

病原性NSD1变异导致索托斯综合征,这是一个发展障碍,伴有过度生长和智力障碍.
家庭索托斯综合征病例很少见,基因型-表型相关数据有限.
一个表观遗传调节剂NSD1与特定的DNA甲基化模式 (表征) 有关.

研究的目的:

为了研究一个家族的NSD1外因子3删除和非典型的索托斯综合征表型.
为了将基因型与表型和家族内的DNA甲基化模式相关联.
评估DNA甲基化和episignature分析对理解家族内变异性的有用性.

主要方法:

使用下一代测序方法进行DNA表征特征分析.
对受影响家庭成员,索托斯综合征患者和对照组的DNA甲基化模式的比较分析.

主要成果:

受影响的家庭成员表现出临床变异性,试验对象受到影响最严重.
在Sotos综合征患者和受影响的家庭成员中观察到全基因组DNA低甲基化.
试验对象的DNA甲基化模式最接近经典的索托斯综合征,在较少受影响的亲属中具有较轻的模式.

结论:

一个家族生殖系NSD1外形3删除与轻度的索托斯综合征相关,表现出可变的表达性.
对DNA甲基化表征的分析显示,在较轻的病例中,这种表征不那么明显.
甲基化表征分析对于探索染色体疾病的家族内变异性是有价值的.

关键词:

通过DNA甲基化.这就是NSD1的意思.非典型的索托斯综合征发展障碍发展障碍发展障碍这种情节的特征是Episignature.索托斯综合征 (Sotos Syndrome) 是一个严重的疾病.

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