在中风后的延迟认知衰退中,值以下的粉样蛋白沉积,大脑小血管疾病和功能性大脑网络障碍
Jae-Sung Lim1, Jae-Joong Lee2, Geon Ha Kim3
1Department of Neurology, Asan Medical Center, Seoul, Republic of Korea.
Frontiers in aging neuroscience
|October 1, 2024
概括
脑卒中后的认知衰退可能源于被破坏的大脑网络. 白质过强度和粉样沉积物可能会导致这些变化,影响中风后的认知功能.
科学领域:
- 神经学 神经学
- 神经成像是一种神经成像.
- 认知科学 认知科学
背景情况:
- 推迟发作的中风后认知衰退 (PSCD) 提供了关于血管对认知障碍和痴呆的贡献的见解.
- 研究血管和神经退行性机制在PSCD中的作用至关重要.
- 假设由于粉样蛋白病理或脑小血管疾病 (cSVD) 的功能分离被破坏,是延迟发病PSCD的基础.
研究的目的:
- 为了研究延迟发作的中风后认知衰退 (PSCD) 的神经生物学基础.
- 在PSCD中检查大脑小血管疾病 (cSVD),粉样蛋白沉积和功能大脑网络改变之间的关联.
- 确定潜在的生物标志物来预测中风后的认知衰退.
主要方法:
- 对中风患者的前性队列研究,基线认知正常.
- 使用MRI进行cSVD评估,静止状态fMRI进行功能网络分析,18F-florbetaben PET用于粉样蛋白成像.
- 使用详细的神经心理测试和神经成像生物标志物,将认知衰退者与非衰退者进行了比较.
主要成果:
- 白质超强度 (WMHs) 与认知能力下降相关 (MMSE分数) 在下降.
- 亚值粉样蛋白沉积显示,在粉样蛋白阴性衰退患者中,与认知功能有反向相关性.
- 衰退者表现出大脑网络模块化和系统分离的破坏,特别是在体运动网络中.
结论:
- 大脑网络组织 (模块化,分离,通信) 的破坏与延迟发病的PSCD有关.
- WMHs和下值粉样蛋白可能会导致这些功能网络中断.
- 结果是假设生成,需要更大的队列验证PSCD机制.
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