患有双性RCC1变异的儿童感染后急性发病的轴突神经病变:一个病例系列
J Robert Harkness1, John H McDermott1, Shea Marsden2
1Manchester Centre for Genomic Medicine, Manchester University NHS Foundation Trust, Manchester, UK; Division of Evolution, Infection and Genomics, School of Biological Sciences, Faculty of Biology, Medicine and Health Sciences, University of Manchester, Manchester, UK.
The Lancet. Neurology
|July 19, 2025
概括
在RCC1的遗传变异导致感染后儿童严重,急性轴突神经病变. 这种状况模仿吉兰-巴雷综合征,涉及核细胞质运输受损,并可能是致命的.
科学领域:
- 遗传学 是一个遗传学.
- 神经学 神经学
- 分子生物学分子生物学
背景情况:
- 儿童感染后严重神经病变的病因尚不清楚.
- 在感染后患有急性轴突神经病变的家庭中发现了RCC1的双变异.
- 这项研究旨在描述这些患者的临床,分子和细胞病理.
研究的目的:
- 描述患有急性轴突神经病变和双基RCC1变异的儿童的临床表型.
- 研究这种神经病变背后的分子和细胞机制.
- 探索RCC1变异在核细胞质运输和应激反应中的作用.
主要方法:
- 国际案例系列的儿童急性轴突神经病变感染后.
- 外基因组/基因组测序以识别遗传变异.
- 在实验室中使用热稳定性和酶定量测试对RCC1蛋白质变体进行表征.
- 在患者衍生的纤维细胞中进行免疫光检测,以评估在压力下细胞运输.
- 生成一个人性化的Drosophila模型以研究体内RCC1功能.
主要成果:
- 鉴定了来自12个家庭的24个患有严重,急性发作的轴突神经病变和双基RCC1变异的个体.
- 观察到可变的表型,从致命的神经病变到轻微的运动障碍,经常模仿吉兰-巴雷综合征.
- RCC1变种损害了GDP-to-GTP交换活性和蛋白质稳定性,导致在压力下出现缺陷的核细胞质运输.
- 一个Drosophila模型证明了对氧化应激的致命不耐受.
结论:
- 在儿童中描述了一种新型的自体递归轴突神经病变,与双基RCC1变体相关,由感染引发.
- 突出了随着肌缩性侧面硬化症的病理机制的潜在重叠.
- 强调了RCC1在核细胞质运输中对轴突健康的关键作用.
- 建议未来对针对核细胞质运输的前症状治疗进行研究.
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