在初级家族性脑化 (PFBC) 病例中,JAM2变异可能比看起来更常见;可能是由于创始突变
Mana Khojasteh1, Parsa Soleimani1, Aida Ghasemi2
1Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran.
概括
JAM2基因的突变与初级家族性脑化 (PFBC) 有关. 这项研究在伊朗家庭中发现了潜在的创始突变,这表明JAM2突变比以前认为的更常见.
科学领域:
- 遗传学 是一个遗传学.
- 神经学 神经学
- 罕见疾病 罕见疾病
背景情况:
- 初级家族性脑化 (PFBC) 是一种罕见的神经疾病,其特征是过度脑化,导致运动和精神问题.
- 在PFBC病例中,JAM2基因突变约占2%,但大约50%的病例的遗传基础仍然未知.
- 这项研究侧重于五个与PFBC无关的伊朗家庭,以调查这种疾病的遗传基础.
研究的目的:
- 在伊朗家庭中识别与PFBC相关的新型遗传变异.
- 扩大已知的突变谱和与JAM2相关的PFBC的临床特征.
- 调查伊朗人口中JAM2突变的流行率和潜在的创始效应.
主要方法:
- 从PFBC患者收集了临床和准临床数据.
- 在试验对象的DNA上进行了全外体序列 (WES) 测序.
- 在JAM2基因中使用单核酸多态 (SNPs) 进行了哈普类型分析.
主要成果:
- 整体外体序列测定在四个家族的JAM2基因中发现了两个同卵性变异.
- 在一个家族中发现了一种新型变异 (c.426dup:p.Ser143Leufs*23),在三个家族中发现了一种已知的突变 (c.685C>T:p.Arg229*).
- 哈普洛型分析表明,p.Arg229*突变可能是伊朗人口中的创始突变,在分析的JAM2-关联家族中的45%中出现.
结论:
- 在JAM2中的p.Arg229*突变可能是伊朗人口中的创始突变,可能起源于中东.
- 这项研究扩大了已知的临床特征和JAM2相关PFBC的突变谱.
- JAM2基因的突变可能是比以前认可的更频繁的PFBC原因.
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