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Wu J, Li H, He J, Tian X, Luo S, Li J, Li W, Zhong J, Zhang H, Huang Z, Sun X, Jiang T. Downregulation of microRNA-9-5p promotes synaptic remodeling in the chronic phase after traumatic brain injury. Cell Death Dis 2021; 12:9. [PMID: 33414448 PMCID: PMC7790831 DOI: 10.1038/s41419-020-03329-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 12/03/2020] [Accepted: 12/07/2020] [Indexed: 01/29/2023]
Abstract
The level of microRNA-9-5p (miRNA-9-5p) in brain tissues is significantly changed in the chronic phase after traumatic brain injury (TBI). However, the effect of miRNA-9-5p on brain function after TBI has not been elucidated. In this study, we used a controlled cortical impact (CCI) model to induce TBI in Sprague-Dawley rats. Brain microvascular endothelial cells (BMECs), astrocytes, and neurons were extracted from immature Sprague-Dawley rats and cocultured to reconstruct the neurovascular unit (NVU) in vitro. The results showed that downregulation of miRNA-9-5p in the chronic phase contributed to neurological function recovery by promoting astrocyte proliferation and increasing the release of astrocyte-derived neurotrophic factors around injured brain tissues after TBI. A dual-luciferase reporter assay validated that miRNA-9-5p was a post-transcriptional modulator of thrombospondin 2 (Thbs-2), and downregulation of miRNA-9-5p promoted Thbs-2 expression in astrocytes. Furthermore, we verified that Thbs-2 can promote Notch pathway activation by directly binding to Jagged and Notch. Through in vitro experiments, we found that the expression of synaptic proteins and the number of synaptic bodies were increased in neurons in the NVU, which was constructed using astrocytes pretreated with miRNA-9-5p inhibitor. Moreover, we also found that downregulation of miRNA-9-5p promoted Thbs-2 expression in astrocytes, which activated the Notch/cylindromatosis/transforming growth factor-β-activated kinase 1 pathway in neurons and promoted the expression of synaptic proteins, including post-synaptic density protein 95 and synaptotagmin. Based on these results, miRNA-9-5p may be a new promising prognostic marker and treatment target for TBI.
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Affiliation(s)
- Jingchuan Wu
- grid.452206.7Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China ,Department of Neurosurgery, General Hospital of The YangTze River Shipping, Wuhan Brain Hospital, Wuhan, Hubei 430014 China
| | - Hui Li
- grid.452206.7Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Junchi He
- grid.452206.7Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Xiaocui Tian
- grid.203458.80000 0000 8653 0555College of Pharmacy, Chongqing Key Laboratory of Biochemistry and Molecular Pharmacology, Chongqing Medical University, Chongqing, Yuzhong 400016 China
| | - Shuilian Luo
- grid.413247.7Department of Ultrasound, Zhongnan Hospital of WuHan University, Wuhan, 430071 China
| | - Jiankang Li
- grid.35030.350000 0004 1792 6846Dept of Computer Science, City University of Hong Kong, 83 Tat Chee Ave, Kowloon Hong Kong, China
| | - Wei Li
- grid.410726.60000 0004 1797 8419BGI Education Center, University of Chinese Academy of Sciences, Shenzhen, 518083 China
| | - Jianjun Zhong
- grid.452206.7Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Hongrong Zhang
- grid.452206.7Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Zhijian Huang
- grid.452206.7Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Xiaochuan Sun
- grid.452206.7Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, 400016 China
| | - Tao Jiang
- grid.24696.3f0000 0004 0369 153XDepartment of Neurosurgery, Beijing TianTan Hospital, Capital Medical University, Beijing, 100050 China ,grid.24696.3f0000 0004 0369 153XBeijing Neurosurgical Institute, Capital Medical University, Beijing, 100050 China ,grid.411617.40000 0004 0642 1244China National Clinical Research Center for Neurological diseases, Beijing, China
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Liu W, Wang X, Zheng Y, Shang G, Huang J, Tao J, Chen L. Electroacupuncture inhibits inflammatory injury by targeting the miR-9-mediated NF-κB signaling pathway following ischemic stroke. Mol Med Rep 2015; 13:1618-26. [PMID: 26718002 PMCID: PMC4732826 DOI: 10.3892/mmr.2015.4745] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2015] [Accepted: 12/08/2015] [Indexed: 11/30/2022] Open
Abstract
The aim of the present study was to investigate the neuroprotective mechanism of the miR-9-mediated activation of the nuclear factor (NF)-κB signaling pathway by electroacupuncture (EA) stimulation of the Quchi (LI11) and Zusanli (ST36) acupoints in a rat model of middle cerebral artery occlusion (MCAO). The present study demonstrated that EA alleviated the symptoms of neurological deficits and reduced the infarct volume in the rat brains. The expression of miR-9 in the peri-infarct cortex was increased in the EA group compared with the MCAO group, and the expression of NF-κB signaling pathway-associated factors, NF-κB p65, tumor necrosis factor (TNF)-α and interleukin (IL)-1β were reduced. Notably, miR-9 inhibitors were revealed to have the ability to suppress EA-alleviated cerebral inflammation and the expression of NF-κB downstream-related factors, NF-κB p65, TNF-α and IL-1β, and caused no alteration on the level of NF-κB upstream-related protein inhibitor of κBα, suggesting that the cerebral protective efficacy of EA targets miR-9-mediated NF-κB downstream pathway following ischemic stroke.
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Affiliation(s)
- Weilin Liu
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China
| | - Xian Wang
- Fujian Rehabilitation Tech Co‑innovation Center, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China
| | - Yi Zheng
- Fujian Rehabilitation Engineering Research Center & Fujian Key Lab of Motor Function Rehabilitation, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China
| | - Guanhao Shang
- Fujian Rehabilitation Tech Co‑innovation Center, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China
| | - Jia Huang
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China
| | - Jing Tao
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China
| | - Lidian Chen
- College of Rehabilitation Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian 350122, P.R. China
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Kuang Y, Liu Q, Shu X, Zhang C, Huang N, Li J, Jiang M, Li H. Dicer1 and MiR-9 are required for proper Notch1 signaling and the Bergmann glial phenotype in the developing mouse cerebellum. Glia 2012; 60:1734-46. [PMID: 22836445 DOI: 10.1002/glia.22392] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Accepted: 06/26/2012] [Indexed: 12/22/2022]
Abstract
MicroRNAs (miRNAs) have important roles in the development of the central nervous system (CNS). Several reports indicate that tissue development and cellular differentiation in the developing forebrain are disrupted in the absence of miRNAs. However, the functions of miRNAs during cerebellar development have not been systematically characterized. Here, we conditionally knocked out the Dicer1 gene under the control of the human glial fibrillary acidic protein (hGFAP) promoter to examine the effect of miRNAs in the developing cerebellum. We particularly focused on the phenotype of Bergmann glia (BG). The hGFAP-Cre activity was detected as early as embryonic day 13.5 (E13.5) at the rhombic lip (RL) in the cerebellar plate, and later in several postnatal cerebellar cell types, including BG. Dicer1 ablation induces a smaller and less developed cerebellum, accompanied by aberrant BG morphology. Notch1 signaling appears to be blocked in Dicer1-ablated BG, with reduced expression of the Notch1 target gene, brain lipid binding protein (BLBP). Using neuronal co-culture assays, we showed an intrinsic effect of Dicer1 on BG morphology and Notch1 target gene expression. We further identified miR-9 as being differentially expressed in BG and showed that miR-9 is a critical, but not the only, miRNA component of the Notch1 signaling pathway in cultured BG cells.
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Affiliation(s)
- Yi Kuang
- West China Developmental and Stem Cell Institute, West China Second University Hospital, Sichuan University, Chengdu, People's Republic of China
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Gao FB. Context-dependent functions of specific microRNAs in neuronal development. Neural Dev 2010; 5:25. [PMID: 20920300 PMCID: PMC2958854 DOI: 10.1186/1749-8104-5-25] [Citation(s) in RCA: 118] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2010] [Accepted: 10/01/2010] [Indexed: 12/15/2022] Open
Abstract
MicroRNAs (miRNAs) are small noncoding RNAs that regulate multiple developmental processes at the post-transcriptional level. Recent rapid progresses have demonstrated critical roles for a number of miRNAs in neuronal development and function. In particular, miR-9 and miR-124 are specifically expressed in the mammalian nervous system, and their respective nucleotide sequences are 100% identical among many species. Yet, their expression patterns and mRNA targets are less conserved throughout evolution. As a consequence, these miRNAs exhibit diverse context-dependent functions in different aspects of neuronal development, ranging from early neurogenesis and neuronal differentiation to dendritic morphogenesis and synaptic plasticity. Some other neuronal miRNAs also exhibit context-dependent functions in development. Thus, post-transcriptional regulation of spatial and temporal expression levels of protein-coding genes by miRNAs contributes uniquely to the proper development and evolution of the complex nervous system.
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Affiliation(s)
- Fen-Biao Gao
- Department of Neurology and Neurobiology, University of Massachusetts Medical School, Worcester, MA 01605, USA.
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Delaloy C, Liu L, Lee JA, Su H, Shen F, Yang GY, Young WL, Ivey KN, Gao FB. MicroRNA-9 coordinates proliferation and migration of human embryonic stem cell-derived neural progenitors. Cell Stem Cell 2010; 6:323-35. [PMID: 20362537 DOI: 10.1016/j.stem.2010.02.015] [Citation(s) in RCA: 260] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2009] [Revised: 12/10/2009] [Accepted: 02/03/2010] [Indexed: 01/25/2023]
Abstract
Human pluripotent stem cells offer promise for use in cell-based therapies for brain injury and diseases. However, their cellular behavior is poorly understood. Here we show that the expression of the brain-specific microRNA-9 (miR-9) is turned on in human neural progenitor cells (hNPCs) derived from human embryonic stem cells. Loss of miR-9 suppressed proliferation but promoted migration of hNPCs cultured in vitro. hNPCs without miR-9 activity also showed enhanced migration when transplanted into mouse embryonic brains or adult brains of a mouse model of stroke. These effects were not due to precocious differentiation of hNPCs. One of the key targets directly regulated by miR-9 encodes stathmin, which increases microtubule instability and whose expression in hNPCs correlates inversely with that of miR-9. Partial inhibition of stathmin activity suppressed the effects of miR-9 loss on proliferation and migration of human or embryonic rat neural progenitors. These results identify miR-9 as a novel regulator that coordinates the proliferation and migration of hNPCs.
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Affiliation(s)
- Celine Delaloy
- Gladstone Institute of Neurological Disease and Department of Neurology, University of California-San Francisco, CA 94158, USA
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