终末期肾病伴认知障碍患者的宏观神经血管耦联和功能整合:一项多模态 MRI 研究。

Macroscale neurovascular coupling and functional integration in end-stage renal disease patients with cognitive impairment: A multimodal MRI study.

机构信息

Department of Radiology, Zhongnan Hospital of Wuhan University, Wuhan, China.

Department of Nephrology, Zhongnan Hospital of Wuhan University, Wuhan, China.

出版信息

J Neurosci Res. 2024 Jan;102(1):e25277. doi: 10.1002/jnr.25277.

Abstract

End-stage renal disease (ESRD) is associated with vascular and neuronal dysfunction, causing neurovascular coupling (NVC) dysfunction, but how NVC dysfunction acts on the mechanism of cognitive impairment in ESRD patients from local to remote is still poorly understood. We recruited 48 ESRD patients and 35 demographically matched healthy controls to scan resting-state functional MRI and arterial spin labeling, then investigated the four types of NVC between amplitude of low-frequency fluctuation (ALFF), fractional ALFF, regional homogeneity, degree centrality, and cerebral blood perfusion (CBF), and associated functional networks. Our results indicated that ESRD patients showed NVC dysfunction in global gray matter and multiple brain regions due to the mismatch between CBF and neural activity, and associated disrupted functional connectivity (FC) within sensorimotor network (SMN), visual network (VN), default mode network (DMN), salience network (SN), and disrupted FC between them with limbic network (LN), while increased FC between SMN and DMN. Anemia may affect the NVC of middle occipital gyrus and precuneus, and increased pulse pressure may result in disrupted FC with SMN. The NVC dysfunction of the right precuneus, middle frontal gyrus, and parahippocampal gyrus and the FC between the right angular gyrus and the right anterior cingulate gyrus may reflect cognitive impairment in ESRD patients. Our study confirmed that ESRD patients may exist NVC dysfunction and disrupted functional integration in SMN, VN, DMN, SN and LN, serving as one of the mechanisms of cognitive impairment. Anemia and increased pulse pressure may be related risk factors.

摘要

终末期肾病(ESRD)与血管和神经元功能障碍有关,导致神经血管耦合(NVC)功能障碍,但 NVC 功能障碍如何从局部作用于 ESRD 患者的认知功能障碍机制,从远程作用,目前仍知之甚少。我们招募了 48 名 ESRD 患者和 35 名年龄匹配的健康对照者进行静息态功能磁共振成像和动脉自旋标记扫描,然后研究了低频振幅(ALFF)、分数 ALFF、局部一致性、度中心性和脑血流灌注(CBF)之间的四种 NVC 类型,以及相关的功能网络。我们的结果表明,由于 CBF 与神经活动之间不匹配,ESRD 患者在全脑灰质和多个脑区表现出 NVC 功能障碍,并伴有感觉运动网络(SMN)、视觉网络(VN)、默认模式网络(DMN)、突显网络(SN)内的功能连接(FC)中断,以及与边缘网络(LN)之间的 FC 中断,同时 SMN 和 DMN 之间的 FC 增加。贫血可能影响中枕叶和楔前叶的 NVC,而脉压增加可能导致与 SMN 的 FC 中断。右侧楔前叶、额中回和海马旁回的 NVC 功能障碍以及右侧角回和右侧前扣带回之间的 FC 可能反映了 ESRD 患者的认知障碍。我们的研究证实,ESRD 患者可能存在 NVC 功能障碍和 SMN、VN、DMN、SN 和 LN 内的功能整合中断,这可能是认知障碍的机制之一。贫血和脉压增加可能是相关的危险因素。

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