总脑小血管病负荷不同患者脑结构网络拓扑属性改变及其与认知障碍的相关性研究
The Correlation of Altered Topological Properties of Brain Structural Networks and Cognitive Impairment in Patients with Different Total Cerebral Small Vessel Disease Burden
DOI: 10.12677/ACM.2023.134748, PDF,    国家自然科学基金支持
作者: 冯萌萌, 梁长虎*：山东大学齐鲁医学院，山东 济南；山东省立医院放射科，山东 济南；文宏伟：西南大学心理学院，认知与人格教育部重点实验室，重庆；郭凌飞：山东省立医院放射科，山东 济南
关键词: 总脑小血管疾病负荷；扩散张量成像；概率性纤维追踪；结构网络；图论；Total Cerebral Small Vessel Disease Burden； Diffusion Tensor Imaging； Probabilistic Tractography； Structural Network； Graph Theory
摘要: 目的：研究总脑小血管病(cerebral small vessel disease, CSVD)负荷不同患者脑结构连接的拓扑属性及其与认知功能的关系。方法：纳入2018年12月至2021年12月期间招募的54名总CSVD负荷严重患者(CSVD-s组)、117名总CSVD负荷轻微患者(CSVD-m组)和73名健康对照者(HC组)。我们使用概率性纤维追踪及图论方法构建白质结构网络，并描述网络的拓扑属性(如小世界属性和网络效率等)。利用单因素协方差分析(analysis of covariance, ANCOVA)对图论指标进行组间比较，进而分析组间显著改变的节点效率与认知参数之间的Pearson相关性。结果：CSVD组和HC组在白质结构网络中均表现出小世界属性。与CSVD-m组和HC组相比，CSVD-s组的局部效率、归一化集聚系数及小世界指数显著(p < 0.05)增加，枢纽分布部分重组。此外，CSVD-s组在左侧眶部额回、海马、丘脑及基底神经节节点效率显著(ANCOVA, p < 0.05)增加。虽然在CSVD-m组中没有发现明显的全局和区域拓扑属性发生变化，但是该组右侧眶内额上回、眶部额中回、杏仁核、苍白球及前扣带回的节点效率与认知参数显著(p < 0.05，FDR校正)相关。值得注意的是，CSVD-s组中却没有发现节点效率与认知功能之间存在显著相关关系。结论：总CSVD负荷不同患者结构网络的改变为辨别CSVD疾病严重程度提供了新的理论依据。认知功能与拓扑属性的相关性表明它们有可能被用作评估CSVD风险的生物标志物。
Abstract: Objective: To investigate the topological properties of brain structural connectivity and its rela-tionship to cognitive function in cerebral small vessel disease (CSVD) patients with different total CSVD burden. Methods: Fifty-four patients with severe total CSVD burden (CSVD-s group), 117 pa-tients with mild total CSVD burden (CSVD-m group), and 73 healthy controls (HC group) were re-cruited between December 2018 and December 2021. We used probabilistic tractography and graph theory methods to construct white matter structural networks and describe the topological properties of the network (e.g., small-world properties and network efficiency). One-way analysis of covariance (ANCOVA) was used to compare graph theoretic indicators among groups, and thus to assess Pearson’s correlations between significantly changed nodal indicators and cognitive param-eters. Results: Both the CSVD and HC groups exhibited efficient small-world properties in white matter structural networks. Compared with the CSVD-m group and the control group, the CSVD-s group showed significantly (p < 0.05) increased local efficiency, normalized clustering coefficient and small world index, with partially reorganized hub distributions. In addition, the CSVD-s group showed significantly (ANCOVA, p < 0.05) increased nodal efficiency in the left orbital frontal gyrus, hippocampus, thalamus, basal ganglia. Although no significant global and regional topological al-terations were found in the CSVD-m group, the nodal efficiency in the medial orbital superior frontal gyrus, orbital middle frontal gyrus, amygdala, pallidum and anterior cingulate gyrus was signifi-cantly (p < 0.05, FDR corrected) correlated with cognitive parameters. Notably, no significant Pear-son’s correlation between nodal metrics and cognitive function was found in the CSVD-s group. Con-clusion: The alterations of structural networks in patients with different total CSVD burden provide a new theoretical basis for discriminating the severity of CSVD. The correlation of cognitive function and topological properties suggests their potential use as biomarkers to assess the risk of CSVD.
文章引用：冯萌萌, 文宏伟, 郭凌飞, 梁长虎. 总脑小血管病负荷不同患者脑结构网络拓扑属性改变及其与认知障碍的相关性研究[J]. 临床医学进展, 2023, 13(4): 5282-5291. https://doi.org/10.12677/ACM.2023.134748

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