[一个患有原发性多变性骨关节病的儿童的遗传分析]
Chen Wang1, Xueping Qiu, Yating Cheng
1Center for Gene Diagnosis/Department of Laboratory Medicine, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, China. zhengfang@whu.edu.cn.
概括
基因测试在HPGD基因中发现了复合异合体变异,包括删除和拼接变异,导致儿童的原发性超性骨关节病.
科学领域:
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
- 儿科 儿科 儿科
背景情况:
- 初级增多性骨关节病 (PHO) 是一种罕见的遗传性疾病.
- 遗传突变,特别是HPGD基因,与PHO病变发生有关.
- 了解遗传基础对于诊断和管理至关重要.
研究的目的:
- 为了调查儿科患者PHO的遗传原因.
- 为了确定HPGD基因中负责这种疾病的特定变异.
主要方法:
- 在患者和父母身上进行了整体外体序列 (WES) 测序.
- 桑格测序,长片PCR和小基因测试用于变异验证.
- 进行了功能性研究,以确认拼接变体的影响.
主要成果:
- 这个孩子在HPGD基因中呈现了复合异合体变异:来自父亲的删除 (外显子3del) 和来自母亲的拼接变异 (c.421+1G>T).
- 长片段PCR证实了孩子和父亲的7565bp异构除 (c.218-1304_324+6156del).
- 迷你基因试验表明,拼接变异导致4号外核突跳转.
结论:
- 在HPGD基因中,复合异合体变异,特别是c.218-1304_324+6156del删除和c.421+1G>T拼接变异,可能是导致患者PHO的原因.
- 这项研究扩大了HPGD基因已知的突变谱.
- 这些发现为受影响家庭的遗传咨询和产前诊断提供了基础.
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