RNA结合蛋白功能障碍将燃烧/缓慢扩张的病变与多发性硬化症中神经退行症联系起来
Miranda L Messmer1,2,3, Hannah E Salapa1,2,4, Bogdan F Popescu2,3
1Office of the Saskatchewan Multiple Sclerosis Clinical Research Chair, University of Saskatchewan, Saskatoon, SK, Canada.
Annals of neurology
|October 18, 2024
概括
RNA结合蛋白 hnRNP A1 功能障碍有助于多发性硬化症 (MS) 中的神经退行,可能由缓慢扩展的病变 (SEL) 恶化. 这项研究揭示了对MS大脑中神经元损伤和疾病进展的见解.
科学领域:
- 神经科学是一个神经科学.
- 病理学 病理学 病理学
- 免疫学 免疫学 免疫学
背景情况:
- 多发性硬化症 (MS) 的特点是持续的神经退行,驾驶残疾和疾病进展,尽管治疗进展.
- 燃烧/缓慢扩张的病变 (SELs) 和RNA结合蛋白 (RBP) 异质核核核糖核蛋白A1 (hnRNP A1) 功能障碍是MS皮质的关键病理特征.
- hnRNP A1功能障碍与神经退行有关,而SEL与MS中的残疾有关.
研究的目的:
- 调查神经元hNRNP A1功能障碍导致渐进性多发性硬化症神经退行症的假设.
- 为了确定hnRNP A1功能障碍是否会因燃烧/缓慢扩张的病变 (SELs) 而加剧.
主要方法:
- 在健康对照和MS大脑中使用免疫组织化学检查神经元hNRNP A1病理 (核细胞质错位).
- 基于hnRNP A1病理严重性的分层MS病例,以分析RBP功能障碍,脱髓化和神经退行之间的联系.
主要成果:
- 燃烧/SEL仅在高神经元hNRNP A1病理 (MS-A1高) 的MS组织中观察到,在相邻的皮质灰质中.
- 与对照和MS-A1高病例相比,MS-A1高病例表现出神经退行症标记的增加,包括神经元损失/损伤,大脑缩和轴突退行,与对照和MS-A1低病例相比.
- 在MS-A1高病例的皮质投影神经元中发现了缺乏NeuN表达的形态完整的神经元子群.
结论:
- hnRNP A1功能障碍与MS中驱动神经退行有关,并且可能被SEL加剧.
- 新N阴性神经元的存在表明神经元损伤的状态,而不是某些皮质神经元的完全丧失.
- 在多发性硬化皮层中表征RBP病理,为神经退行症的机制和渐进性多发性硬化症残疾的基础提供了关键的见解.
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