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Dong X, Liu B, Huang W, Chen H, Zhang Y, Yao Z, Shmuel A, Yang A, Dai Z, Ma G, Shu N. Disrupted cerebellar structural connectome in spinocerebellar ataxia type 3 and its association with transcriptional profiles. Cereb Cortex 2024; 34:bhae238. [PMID: 38850215 DOI: 10.1093/cercor/bhae238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 05/16/2024] [Accepted: 05/23/2024] [Indexed: 06/10/2024] Open
Abstract
Spinocerebellar ataxia type 3 (SCA3) is primarily characterized by progressive cerebellar degeneration, including gray matter atrophy and disrupted anatomical and functional connectivity. The alterations of cerebellar white matter structural network in SCA3 and the underlying neurobiological mechanism remain unknown. Using a cohort of 20 patients with SCA3 and 20 healthy controls, we constructed cerebellar structural networks from diffusion MRI and investigated alterations of topological organization. Then, we mapped the alterations with transcriptome data from the Allen Human Brain Atlas to identify possible biological mechanisms for regional selective vulnerability to white matter damage. Compared with healthy controls, SCA3 patients exhibited reduced global and nodal efficiency, along with a widespread decrease in edge strength, particularly affecting edges connected to hub regions. The strength of inter-module connections was lower in SCA3 group and negatively correlated with the Scale for the Assessment and Rating of Ataxia score, International Cooperative Ataxia Rating Scale score, and cytosine-adenine-guanine repeat number. Moreover, the transcriptome-connectome association study identified the expression of genes involved in synapse-related and metabolic biological processes. These findings suggest a mechanism of white matter vulnerability and a potential image biomarker for the disease severity, providing insights into neurodegeneration and pathogenesis in this disease.
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Affiliation(s)
- Xinyi Dong
- State Key Laboratory of Cognitive Neuroscience and Learning and IDG/McGovern Institute for Brain Research, Beijing Normal University, 19 Xiejiekouwai Street, Haidian District, Beijing 100875, China
- BABRI Centre, Beijing Normal University, 19 Xiejiekouwai Street, Haidian District, Beijing 100875, China
- Beijing Key Laboratory of Brain Imaging and Connectomics, Beijing Normal University, 19 Xiejiekouwai Street, Haidian District, Beijing 100875, China
| | - Bing Liu
- Department of Radiology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, 324 Jing-wu Road, Jinan, Shandong Province, 250021, China
| | - Weijie Huang
- State Key Laboratory of Cognitive Neuroscience and Learning and IDG/McGovern Institute for Brain Research, Beijing Normal University, 19 Xiejiekouwai Street, Haidian District, Beijing 100875, China
- BABRI Centre, Beijing Normal University, 19 Xiejiekouwai Street, Haidian District, Beijing 100875, China
- Beijing Key Laboratory of Brain Imaging and Connectomics, Beijing Normal University, 19 Xiejiekouwai Street, Haidian District, Beijing 100875, China
- Department of Systems Science, Beijing Normal University, 19 Xiejiekouwai Street, Haidian District, Beijing 100875, China
| | - Haojie Chen
- State Key Laboratory of Cognitive Neuroscience and Learning and IDG/McGovern Institute for Brain Research, Beijing Normal University, 19 Xiejiekouwai Street, Haidian District, Beijing 100875, China
- BABRI Centre, Beijing Normal University, 19 Xiejiekouwai Street, Haidian District, Beijing 100875, China
- Beijing Key Laboratory of Brain Imaging and Connectomics, Beijing Normal University, 19 Xiejiekouwai Street, Haidian District, Beijing 100875, China
| | - Yunhao Zhang
- State Key Laboratory of Multimodal Artificial Intelligence Systems, Institute of Automation, Chinese Academy of Sciences, 95 Zhongguancun East Road, Haidian District, Beijing 100190, China
| | - Zeshan Yao
- Institute of Biomedical Engineering, Jingjinji National Center of Technology Innovation, Building 9, No. 6 Dongsheng Science Park North Street, Haidian District, Beijing 100094, China
| | - Amir Shmuel
- McConnell Brain Imaging Centre, Montreal Neurological Institute, 3801 University, Room NW261, Montreal, QC, Canada H3A 2B4
- Departments of Neurology and Neurosurgery, Physiology, and Biomedical Engineering, 3801 University, Room NW261, Montreal, QC, Canada H3A 2B4
| | - Aocai Yang
- Department of Radiology, China-Japan Friendship Hospital, No. 2 East Yinghua Road, Chaoyang District, Beijing 100029, China
| | - Zhengjia Dai
- Department of Psychology, Sun Yat-sen University, 132 Outer Ring East Road, Panyu District, Guangzhou, Guangdong Province, 510275, China
| | - Guolin Ma
- Department of Radiology, China-Japan Friendship Hospital, No. 2 East Yinghua Road, Chaoyang District, Beijing 100029, China
| | - Ni Shu
- State Key Laboratory of Cognitive Neuroscience and Learning and IDG/McGovern Institute for Brain Research, Beijing Normal University, 19 Xiejiekouwai Street, Haidian District, Beijing 100875, China
- BABRI Centre, Beijing Normal University, 19 Xiejiekouwai Street, Haidian District, Beijing 100875, China
- Beijing Key Laboratory of Brain Imaging and Connectomics, Beijing Normal University, 19 Xiejiekouwai Street, Haidian District, Beijing 100875, China
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Putka AF, Mato JP, McLoughlin HS. Myelinating Glia: Potential Therapeutic Targets in Polyglutamine Spinocerebellar Ataxias. Cells 2023; 12:cells12040601. [PMID: 36831268 PMCID: PMC9953858 DOI: 10.3390/cells12040601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 02/09/2023] [Accepted: 02/11/2023] [Indexed: 02/15/2023] Open
Abstract
Human studies, in combination with animal and cellular models, support glial cells as both major contributors to neurodegenerative diseases and promising therapeutic targets. Among glial cells, oligodendrocytes and Schwann cells are the myelinating glial cells of the central and peripheral nervous system, respectively. In this review, we discuss the contributions of these central and peripheral myelinating glia to the pathomechanisms of polyglutamine (polyQ) spinocerebellar ataxia (SCA) types 1, 2, 3, 6, 7, and 17. First, we highlight the function of oligodendrocytes in healthy conditions and how they are disrupted in polyQ SCA patients and diseased model systems. We then cover the role of Schwann cells in peripheral nerve function and repair as well as their possible role in peripheral neuropathy in polyQ SCAs. Finally, we discuss potential polyQ SCA therapeutic interventions in myelinating glial.
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Affiliation(s)
- Alexandra F. Putka
- Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA
- Neuroscience Graduate Program, University of Michigan, Ann Arbor, MI 48109, USA
| | - Juan P. Mato
- Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA
- Neuroscience Graduate Program, University of Michigan, Ann Arbor, MI 48109, USA
| | - Hayley S. McLoughlin
- Department of Neurology, University of Michigan, Ann Arbor, MI 48109, USA
- Correspondence:
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