新型双性SASS6变异与初级小头症和胎儿生长限制相关
Xiangtian Kong1, Jian Xu2, Honggang Yin3
1Department of Medical Genetics and Prenatal Diagnosis, Affiliated Maternity and Child Health Care Hospital of Nantong University, Nantong, China.
American journal of medical genetics. Part A
|March 19, 2024
概括
在SASS6基因的遗传变异导致初级小头症,一个小头尺寸的条件. 这项研究确定了与小头症和胎儿生长限制 (FGR) 相关的新SASS6变异.
科学领域:
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
- 人类的病理学.
背景情况:
- 初级小头是一种神经发育障碍,其定义是头部周长比典型的小得多.
- 遗传突变是原发小头症的已知原因,之前已经确定了几种SASS6基因变异.
- SASS6基因在大脑发育和纤毛发育中起着至关重要的作用.
研究的目的:
- 在一个非血缘关系的中国家庭中调查小头症和胎儿生长限制 (FGR) 的遗传原因.
- 为了识别与这些疾病相关的SASS6基因中的新型变异.
- 扩大对SASS6基因在小头病原发生中的作用及其表型谱的理解.
主要方法:
- 在受影响的胎儿和父母身上进行了三个全外组测序.
- 从母亲的外周血液白细胞中提取的RNA使用逆转录酶-聚合酶链反应 (RT-PCR) 来分析.
- 确定了基因变异,并评估了它们对SASS6基因表达的功能影响.
主要成果:
- 在受影响的胎儿中发现了SASS6基因的复合异构性变异:一个框架转移变异 (c.450_453del) 和一个拼接区域变异 (c.1674+3A>G).
- 通过RT-PCR分析证实,拼接区域变异导致14号外子跳转,导致内框架删除.
- 这项研究报告了FGR和SASS6相关的小头症之间的第一次关联.
结论:
- 已识别的复合异构性SASS6变体可能是该家族中小头症和FGR的原因.
- 这些发现凸显了SASS6在大脑发育中的关键作用,并强调了它在小头症中的参与.
- 这项研究扩大了SASS6-关联小头症的已知突变谱和表型表现,包括与FGR的新兴关联.
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