流域地区更容易受到多发性硬化症中的组织微结构损伤的影响
Ahmad A Toubasi1, Junzhong Xu2, Jarrod J Eisma1
1Neuorimaging Unit, Neuroimmunology Division, Department of Neurology, Vanderbilt University Medical Center (VUMC), Nashville, TN 37232, USA.
Brain communications
|October 7, 2024
概括
早期多发性硬化症 (MS) 病变集中在大脑的分水区域,表明由于较低的氧气水平而导致的脆弱性. 这项研究提供了体内证据,在诊断时将大脑血管化与MS组织损伤联系起来.
科学领域:
- 神经成像是一种神经成像.
- 神经学 神经学
- 血管生物学 血管生物学
背景情况:
- 组织病理学揭示了流域地区多发性硬化症 (MS) 白质病变度较高,这表明与氧气减少有关的易感性.
- 在MS疾病过程中,病变偏向流域的时间尚不清楚.
研究的目的:
- 调查新诊断的MS,临床隔离综合征 (CIS) 或放射隔离综合征 (RIS) 患者是否表现出不成比例的白质病变局部化到流域区域.
- 为了确定微观结构损伤在流域病变中是否比其他大脑血管区域更严重.
主要方法:
- 大脑MRI (T1,T2-FLAIR,定量磁化转移,用球形平均技术进行扩散成像) 对38名新诊断的MS/CIS/RIS患者和16名健康对照进行.
- 计算了宏分子与自由池大小比率 (髓蛋白完整性) 和明显的轴突体积分数 (轴突完整性).
- 创建了流域地图,以注释病变位置 (流域,非流域,混合) 并使用通用线性混合模型分析微结构差异.
主要成果:
- 流域地区患者的T2损伤和慢性黑洞 (cBHs) 度显著更高 (P≤0.041,P≤0.036).
- 与其他区域相比,流域地区的T2损伤表现出较低的髓完整性 (池大小比率) (P=0.039).
- 健康对照组在混合血管区域显示出更高的轴突完整性,但在不同区域的髓完整性没有差异.
结论:
- 这项研究提供了体内证据,在诊断时将大脑动脉血管化与MS诱导的组织损伤联系在一起.
- 这些发现强调了氧气输送和动脉健康在预防多发性硬化病变的形成和改善患者治疗结果方面发挥的关键作用.
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