在REM睡眠行为障碍中,整个大脑的铁积累模式是REM睡眠行为障碍
Zsoka Varga1, Jiri Keller2, Simon Daniel Robinson3
1Department of Neurology and Center of Clinical Neuroscience, First Faculty of Medicine, Charles University and General University Hospital in Prague, Czech Republic.
Human brain mapping
|April 9, 2024
概括
孤立的REM睡眠行为障碍 (iRBD) 显示在前额外外皮质中早期的脑铁积累,表明在帕金森病发病之前广泛的神经退行. 这一发现突显了iRBD作为一个关键的前进性同核因子病变阶段.
科学领域:
- 神经成像是一种神经成像.
- 神经学 神经学
- 放射学 放射学是一门学科.
背景情况:
- 孤立的REM睡眠行为障碍 (iRBD) 是一种前发性同核病变,通常在帕金森病 (PD) 之前出现.
- 黑色物质 (SN) 中病态铁的积累是PD的已知特征,可以通过定量敏感性映射 (QSM) 检测到.
- 在iRBD中评估QSM可能会揭示synucleinopathies中的早期神经退行.
研究的目的:
- 为了研究iRBD,PD和健康对照 (HC) 的全脑QSM差异.
- 通过使用QSM. 确定神经退行症在prodromal synucleinopathy中的程度.
- 为了将QSM发现与iRBD中的多巴胺基退行相关联.
主要方法:
- 70名新的PD患者,70名iRBD患者和60名HC患者接受了3TMRI.
- T1和敏感度加权图像被处理为标准化QSM.
- 基于voxel的分析比较了灰色物质在不同组的磁性易感性 (家庭智能错误纠正 p < .05).
主要成果:
- 与PD和HC相比,iRBD患者表现出较高的前额-双叶皮层敏感性.
- 患有PD的患者表现出杏仁体和海马体相对于iRBD的敏感性增加.
- 无论是PD和iRBD组都增加了SN敏感性与HC相比,具有明显的黑色素参与 (PD的SN1,iRBD的SN2).
- 在iRBD中,异常的多巴胺载体SPECT与SN1敏感性相关.
结论:
- 与早期PD相比,iRBD患者表现出更广泛的亚临床神经病理学,包括前额外外皮层的参与,比早期PD.
- 黑色物质 (substantia nigra) 的敏感性增加与iRBD和PD的多巴胺基变性相匹配.
- QSM是检测同核蛋白病变中早期神经退行的一个有价值的工具.
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