在MRI上微结构性白质损伤与荷兰型脑粉样血管病变的疾病严重程度有关
Ingeborg Rasing1, Naomi Vlegels2, Manon R Schipper3
1Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands.
概括
骨化平均扩散率 (PSMD) 的峰值宽度随着疾病严重程度的增加而增加,在荷兰型遗传性脑粉样血管病变 (D-CAA) 中. 这种扩散MRI标记与MRI检测到的CAA负担和认知衰退相关,这表明它在监测D-CAA进展方面的有用性.
科学领域:
- 神经成像是一种神经成像.
- 神经学 神经学
- 生物标志物 生物标志物
背景情况:
- 大脑粉样蛋白血管病变 (CAA) 涉及大脑血管中的粉样蛋白-β沉积,导致微观结构白质损伤.
- 早期发现白质变化对于理解CAA进展和制定干预措施至关重要.
- 骨架平均扩散率 (PSMD) 的峰值宽度是评估白质微观结构的新兴扩散-MRI标志物.
研究的目的:
- 评估PSMD在荷兰型遗传性CAA (D-CAA) 的临床范围.
- 调查PSMD与其他CAA相关的MRI标记物和认知症状的相关性.
- 确定PSMD作为监测D-CAA进展的工具的潜力.
主要方法:
- 从59名D-CAA突变载体 (症状前和症状后) 获取了扩散MRI数据.
- 根据疾病严重程度,认知表现 (Trail Making Test A) 和MRI标记 (白质过强度,微型血液,SVD负担) 计算和分析PSMD.
- 使用线性回归模型来评估关联.
主要成果:
- 与症状前携带者相比,有症状的D-CAA突变携带者中的PSMD水平显著更高 (p < 0.001).
- PSMD与年龄,CAA-SVD负担 (adj.B=0.42,p=0.002),大脑微型血流 (adj.B=0.30,p=0.009) 和白质强度 (深度:adj.B=0.46,p<0.001;周周:adj.B=0.38,p=0.004) 有正相关性.
- 增加的PSMD与TMT-A (B=-0.42,p=0.04) 的表现较差有关,这表明信息处理速度受损.
结论:
- 在D-CAA中微结构性白质损伤与疾病阶段,MRI上的CAA负担和认知障碍有关.
- PSMD 作为白质微观结构变化的全球测量.
- 在CAA中,PSMD可能是监测疾病进展的宝贵工具.
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