扩大β-曼诺化病的表型谱
Angela M Martin Rios1, Liliane H Gibbs2, Karolina M Stepien3
1Division of Genetics, Department of Pediatrics, University of California, Irvine, Orange, CA.
Neurology. Genetics
|November 14, 2025
概括
这项研究详细介绍了超罕见的溶酶体储存障碍β-mannosidosis的新临床特征和脑成像发现. 它扩大了对疾病的理解.
科学领域:
- 生物化学 生物化学
- 遗传学 是一个遗传学.
- 神经学 神经学
背景情况:
- β-mannosidosis是一种超罕见的溶酶体储存障碍,由缺乏β-mannosidase活性引起.
- 少数病例限制了对其自然历史和神经成像的理解.
- 这项研究旨在通过报告新病例和审查现有文献来扩大知识.
研究的目的:
- 描述六名新的β-mannosidosis患者的临床特征,遗传变异和酶活性.
- 审查之前报告的病例,以扩大临床范围,并确定基因型-表型相关性.
- 分析大脑MRI发现和纵向变化.
主要方法:
- 详细的临床评估六个无关的患者与β-曼诺西多斯.
- 分析MANBA基因变异,酶活性和尿液中的寡糖样.
- 大脑MRI评估,包括两名患者的纵向变化,以及对40个额外病例的文献审查.
主要成果:
- 新发现的特征包括发育回归,消化不良,强迫症类行为,红色肌痛和阴影.
- 大脑核磁共振扫描显示受影响患者的延迟和扩散的低血髓化.
- 报告共有46例病例,平均诊断年龄为12.8岁;听力损失和智力障碍是常见的症状.
- 报告的病例中有40%显示神经成像异常,包括缩,化和白质变化.
- 确定了29种致病性MANBA变种,其中c.2158-2A>G是复发的.
结论:
- 在β-mannosidosis中的基因型-表型相关性由于变异性和稀有性而仍然具有挑战性.
- 修饰基因可能会影响疾病表达.
- 在听力损失,低髓质化,行为问题和智力障碍的差异诊断中应考虑β-曼诺доз.
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