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对于诊断来说,永远不会太晚
Mariana Coelho1, João Durães1,2, João Freixo3
1Serviço de Neurologia do Centro Hospitalar e Universitário de Coimbra (CHUC).
泽尔韦格谱系障碍 (ZSD) 是一种具有不同严重程度的遗传疾病. 一个PEX1基因变异 (c.2528G>A) 表明一个中间的ZSD表型,允许生存到成年.
科学领域:
- 遗传学 遗传学 是一个
- 神经学 神经学
- 生物化学 生物化学
背景情况:
- 泽尔韦格谱系障碍 (ZSD) 是一组由PEX基因缺陷引起的遗传疾病,具有广泛的临床严重程度.
- 诊断依赖于生物化学标记物和遗传检测,但存在诸如老年患者假阴性等挑战.
- 确定的诊断需要在13个ZSD-PEX基因中的一个中确定双基致病变体.
研究的目的:
- 报告通过分子遗传测试诊断的泽尔韦格谱系障碍 (ZSD) 病例.
- 调查与ZSD相关的特定PEX1基因变异的临床表现和遗传基础.
- 突出准确基因诊断对于患者管理和家庭咨询的重要性.
主要方法:
- 对一名39岁女性进行临床评估,该女性患有全球发育迟缓和神经衰退.
- 大脑MRI用于评估白血病缩和大脑缩.
- 使用白血病基因面板进行分子遗传分析,以确定致病变体.
主要成果:
- 患者表现出全局发育迟缓,发作和逐渐的神经衰退.
- 大脑MRI显示严重的白血病缩和大脑缩.
- 确定了PEX1基因 (c.2528G>A; p.(Gly843Asp)) 中的一种致病变异的同胞性,证实了ZSD.
结论:
- 对于PEX1 p.Gly843Asp变体的同卵性与中级或较轻的ZSD表型有关,与成年后的生存相容.
- 鉴定到的PEX1变种可以导致渐进性白血病缩和神经衰退,正如在这个病人身上观察到的.
- 准确的ZSD遗传诊断对于预后,管理和遗传咨询至关重要,尽管缺乏特定的治疗方法.
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