心脏参与和TBCK相关的神经发育障碍:这是这种疾病的新特征吗?
Gioia Mastromoro1, Daniele Guadagnolo1, Francesca Gianno2
1Department of Experimental Medicine, Sapienza University of Rome, Rome, Italy.
American journal of medical genetics. Part A
|January 26, 2025
概括
双性TBCK变体导致一种罕见的遗传疾病. 这项研究在受影响的婴儿中发现了新的心脏形和大脑异常,扩大了这种疾病的已知特征.
科学领域:
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
- 神经学 神经学
背景情况:
- TBCK (TBC1域含基因酶) 对于通过mTOR途径进行actin组织和细胞增殖至关重要.
- 有害的双基TBCK变体与婴儿期的Hypotonia有关,具有精神运动迟缓和特征性面部3 (OMIM 618472).
研究的目的:
- 调查一家血缘关系中的TBCK相关疾病的遗传基础和表型谱.
- 确定与TBCK变异相关的新型临床特征.
主要方法:
- 整个外基因组的测序.
- 染色体微阵列分析
- 胎儿心声学和胎儿解剖
主要成果:
- 在三个受影响的兄弟姐妹中确定了一种致病性同卵性c.1532G>A TBCK变异.
- 观察到以前没有报告的心脏形 (低可塑性大动脉,法洛特四重律) 和中枢神经系统异常 (体生长).
- 新的超声检查结果包括囊性湿瘤和低可塑性鼻骨.
结论:
- 心脏形和中枢神经系统异常代表了TBCK相关疾病的潜在新型表型谱.
- 遗传咨询和产前诊断对于已知致病性TBCK变体的家庭至关重要.
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