机构：[1]Department of Radiology and Nuclear Medicine, Xuanwu Hospital, Capital Medical University, No.45 Changchun Street, Xicheng District, Beijing 100053, China医技科室放射科首都医科大学宣武医院[2]Department of Radiology, Beijing Youan Hospital, Capital Medical University, No.8 Xi Tou Tiao Youanmen Wai, Fengtai District, Beijing 100069, China[3]Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics, Beijing 100053, China[4]Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China[5]Department of Radiology, Tianjin First Central Hospital, Nankai University, Tianjin 300192, China
BackgroundAlthough most patients can recover from SARS-CoV-2 infection during the short-term, the long-term effects of COVID-19 on the brain remain explored. Functional MRI (fMRI) could potentially elucidate or otherwise contribute to the investigation of the long COVID syndrome. A lower fMRI response would be translated into decreased brain activity or delayed signal transferring reflecting decreased connectivity. This research aimed to investigate the long-term alterations in the local (regional) brain activity and remote (interregional) functional connection in recovered COVID-19.MethodsThirty-five previously hospitalized COVID-19 patients underwent 3D T(1)weighed imaging and resting-state fMRI at 6-month follow-up, and 36 demographic-matched healthy controls (HCs) were recruited accordingly. The amplitude of low-frequency fluctuation (ALFF) and seed-based functional connectivity (FC) was used to assess the regional intrinsic brain activity and the influence of regional disturbances on FC with other brain regions. Spearman correlation analyses were performed to evaluate the association between brain function changes and clinical variables.ResultsThe incidence of neurosymptoms (6/35, 17.14%) decreased significantly at 6-month follow-up, compared with COVID-19 hospitalization stage (21/35, 60%). Compared with HCs, recovered COVID-19 exhibited higher ALFF in right precuneus, middle temporal gyrus, middle and inferior occipital gyrus, lower ALFF in right middle frontal gyrus and bilateral inferior temporal gyrus. Furthermore, setting seven abnormal activity regions as seeds, we found increased FC between right middle occipital gyrus and left inferior occipital gyrus, and reduced FC between right inferior occipital gyrus and right inferior temporal gyrus/bilateral fusiform gyrus, and between right middle frontal gyrus and right middle frontal gyrus/ supplementary motor cortex/ precuneus. Additionally, abnormal ALFF and FC were associated with clinical variables.ConclusionsCOVID-19 related neurological symptoms can self heal over time. Recovered COVID-19 presented functional alterations in right frontal, temporal and occipital lobe at 6-month follow-up. Most regional disturbances in ALFF were related to the weakening of short-range regional interactions in the same brain function.
基金：
This work was supported by the National Natural Science Foundation of
China [No. 82202118, 82271963 and 61936013]; Beijing Natural Science
Foundation [No. L222097]; Huizhi Ascent Project of Xuanwu Hospital [No.
HZ2021ZCLJ005]
第一作者机构：[1]Department of Radiology and Nuclear Medicine, Xuanwu Hospital, Capital Medical University, No.45 Changchun Street, Xicheng District, Beijing 100053, China[2]Department of Radiology, Beijing Youan Hospital, Capital Medical University, No.8 Xi Tou Tiao Youanmen Wai, Fengtai District, Beijing 100069, China[3]Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics, Beijing 100053, China
共同第一作者：
通讯作者：
通讯机构：[1]Department of Radiology and Nuclear Medicine, Xuanwu Hospital, Capital Medical University, No.45 Changchun Street, Xicheng District, Beijing 100053, China[3]Beijing Key Laboratory of Magnetic Resonance Imaging and Brain Informatics, Beijing 100053, China
推荐引用方式(GB/T 7714)：
Li Ruili,Liu Guangxue,Zhang Xiaodong,et al.Altered intrinsic brain activity and functional connectivity in COVID-19 hospitalized patients at 6-month follow-up[J].BMC INFECTIOUS DISEASES.2023,23(1):doi:10.1186/s12879-023-08331-8.
APA：
Li, Ruili,Liu, Guangxue,Zhang, Xiaodong,Zhang, Miao,Lu, Jie&Li, Hongjun.(2023).Altered intrinsic brain activity and functional connectivity in COVID-19 hospitalized patients at 6-month follow-up.BMC INFECTIOUS DISEASES,23,(1)
MLA：
Li, Ruili,et al."Altered intrinsic brain activity and functional connectivity in COVID-19 hospitalized patients at 6-month follow-up".BMC INFECTIOUS DISEASES 23..1(2023)
