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Wang J, Yang Z, Zhang M, Shan Y, Rong D, Ma Q, Liu H, Wu X, Li K, Ding Z, Lu J. Disrupted functional connectivity and activity in the white matter of the sensorimotor system in patients with pontine strokes. J Magn Reson Imaging 2018; 49:478-486. [PMID: 30291655 DOI: 10.1002/jmri.26214] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 05/22/2018] [Indexed: 11/11/2022] Open
Affiliation(s)
- Jingjuan Wang
- Department of Nuclear Medicine; Xuanwu Hospital Capital Medical University; Beijing China
| | - Zhipeng Yang
- Department of Computer Science; Chengdu University Information Technology; Chengdu China
- Vanderbilt University Institute of Imaging Science; Nashville Tennessee USA
| | - Miao Zhang
- Department of Radiology; Xuanwu Hospital Capital Medical University; Beijing China
| | - Yi Shan
- Department of Radiology; Xuanwu Hospital Capital Medical University; Beijing China
| | - Dongdong Rong
- Department of Radiology; Xuanwu Hospital Capital Medical University; Beijing China
| | - Qingfeng Ma
- Department of Neurology; Xuanwu Hospital Capital Medical University; Beijing China
| | - Hesheng Liu
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology; Massachusetts General Hospital, Harvard Medical School; Boston Massachusetts USA
| | - Xi Wu
- Department of Computer Science; Chengdu University Information Technology; Chengdu China
- Vanderbilt University Institute of Imaging Science; Nashville Tennessee USA
| | - Kuncheng Li
- Department of Radiology; Xuanwu Hospital Capital Medical University; Beijing China
| | - Zhaohua Ding
- Vanderbilt University Institute of Imaging Science; Nashville Tennessee USA
- Department of Electrical Engineering and Computer Science; Vanderbilt University; Nashville Tennessee USA
| | - Jie Lu
- Department of Nuclear Medicine; Xuanwu Hospital Capital Medical University; Beijing China
- Department of Radiology; Xuanwu Hospital Capital Medical University; Beijing China
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Zhang J, Chen S, Shi W, Li M, Zhan Y, Yang L, Zou H, Lei J, Chai X, Gao K, Liu J, Wang W, Wang Y, Zhao H. Effects of Xiaoshuan Enteric-Coated Capsule on White and Gray Matter Injury Evaluated by Diffusion Tensor Imaging in Ischemic Stroke. Cell Transplant 2018; 28:671-683. [PMID: 30284459 PMCID: PMC6686435 DOI: 10.1177/0963689718802755] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Xiaoshuan enteric-coated capsule (XSECC) is a drug approved by the Chinese State Food and Drug Administration for the treatment of stroke. This study was to investigate the effects of XSECC on white and gray matter injury in a rat model of ischemic stroke by diffusion tensor imaging (DTI) and histopathological analyses. The ischemia was induced by middle cerebral artery occlusion (MCAO). The cerebral blood flow measured by arterial spin labeling was improved by treatment with XSECC on the 3rd, 7th, 14th and 30th days after MCAO. Spatiotemporal white and gray matter changes in MCAO rats were examined with DTI-derived parameters (fractional anisotropy, FA; apparent diffusion coefficient, ADC; axial diffusivity, λ//; radial diffusivity, λ⊥). The increased FA was found in the XSECC treatment group in the corpus callosum, external capsule and internal capsule, linked with the decreased λ//, λ⊥ and ADC on the 3rd day and reduced ADC on the 30th day in the external capsule, suggesting XSECC reduced the axon and myelin damage in white matter after stroke. The relative FA in the striatum, cortex and thalamus in XSECC treatment group was significantly increased on the 3rd, 7th, 14th and 30th days accompanied by the increased λ// on the 3rd day and reduced relative ADC and λ⊥ on the 30th day, indicating that XSECC attenuated cell swelling and membrane damage in the early stage and tissue liquefaction necrosis in the late stage in gray matter after stroke. Additionally, XSECC-treated rats exhibited increased mean fiber length assessed by diffusion tensor tractography. Moreover, histopathological analyses provided evidence that XSECC relieved nerve cell and myelin damage in white and gray matter after stroke. Our research reveals that XSECC could alleviate white and gray matter injury, especially reducing nerve cell damage and promoting the repair of axon and myelin after ischemic stroke.
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Affiliation(s)
- Jian Zhang
- 1 School of Traditional Chinese Medicine, Capital Medical University, Beijing, China.,2 School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Shengpan Chen
- 3 Department of Neurosurgery, Affiliated Haikou Hospital, Xiangya School of Medicine, Central South University, Haikou, China
| | - Weilong Shi
- 4 Pharmacy Department, Peking University Third Hospital, Beijing, China
| | - Manzhong Li
- 1 School of Traditional Chinese Medicine, Capital Medical University, Beijing, China
| | - Yu Zhan
- 1 School of Traditional Chinese Medicine, Capital Medical University, Beijing, China
| | - Le Yang
- 1 School of Traditional Chinese Medicine, Capital Medical University, Beijing, China
| | - Haiyan Zou
- 1 School of Traditional Chinese Medicine, Capital Medical University, Beijing, China
| | - Jianfeng Lei
- 1 School of Traditional Chinese Medicine, Capital Medical University, Beijing, China
| | - Xinlou Chai
- 2 School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Kuo Gao
- 2 School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Junjie Liu
- 5 Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing, China
| | - Wei Wang
- 2 School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Yong Wang
- 2 School of Traditional Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China.,6 School of Life Science, Beijing University of Chinese Medicine, Beijing, China
| | - Hui Zhao
- 1 School of Traditional Chinese Medicine, Capital Medical University, Beijing, China
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Diffusion Tensor Imaging Evaluation of Neural Network Development in Patients Undergoing Therapeutic Repetitive Transcranial Magnetic Stimulation following Stroke. Neural Plast 2018; 2018:3901016. [PMID: 29725347 PMCID: PMC5872629 DOI: 10.1155/2018/3901016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 12/04/2017] [Indexed: 11/29/2022] Open
Abstract
We aimed to investigate plastic changes in cerebral white matter structures using diffusion tensor imaging following a 15-day stroke rehabilitation program. We compared the detection of cerebral plasticity between generalized fractional anisotropy (GFA), a novel tool for investigating white matter structures, and fractional anisotropy (FA). Low-frequency repetitive transcranial magnetic stimulation (LF-rTMS) of 2400 pulses applied to the nonlesional hemisphere and 240 min intensive occupation therapy (OT) daily over 15 days. Motor function was evaluated using the Fugl-Meyer assessment (FMA) and Wolf Motor Function Test (WMFT). Patients underwent diffusion tensor magnetic resonance imaging (MRI) on admission and discharge, from which bilateral FA and GFA values in Brodmann area (BA) 4 and BA6 were calculated. Motor function improved following treatment (p < 0.001). Treatment increased GFA values for both the lesioned and nonlesioned BA4 (p < 0.05, p < 0.001, resp.). Changes in GFA value for BA4 of the lesioned hemisphere were significantly inversely correlated with changes in WMFT scores (R2 = 0.363, p < 0.05). Our findings indicate that the GFA may have a potentially more useful ability than FA to detect changes in white matter structures in areas of fiber intersection for any such future investigations.
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