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The Proteostasis Network: A Global Therapeutic Target for Neuroprotection after Spinal Cord Injury. Cells 2022; 11:cells11213339. [PMID: 36359735 PMCID: PMC9658791 DOI: 10.3390/cells11213339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/14/2022] [Accepted: 10/20/2022] [Indexed: 01/18/2023] Open
Abstract
Proteostasis (protein homeostasis) is critical for cellular as well as organismal survival. It is strictly regulated by multiple conserved pathways including the ubiquitin-proteasome system, autophagy, the heat shock response, the integrated stress response, and the unfolded protein response. These overlapping proteostasis maintenance modules respond to various forms of cellular stress as well as organismal injury. While proteostasis restoration and ultimately organism survival is the main evolutionary driver of such a regulation, unresolved disruption of proteostasis may engage pro-apoptotic mediators of those pathways to eliminate defective cells. In this review, we discuss proteostasis contributions to the pathogenesis of traumatic spinal cord injury (SCI). Most published reports focused on the role of proteostasis networks in acute/sub-acute tissue damage post-SCI. Those reports reveal a complex picture with cell type- and/or proteostasis mediator-specific effects on loss of neurons and/or glia that often translate into the corresponding modulation of functional recovery. Effects of proteostasis networks on such phenomena as neuro-repair, post-injury plasticity, as well as systemic manifestations of SCI including dysregulation of the immune system, metabolism or cardiovascular function are currently understudied. However, as potential interventions that target the proteostasis networks are expected to impact many cell types across multiple organ systems that are compromised after SCI, such therapies could produce beneficial effects across the wide spectrum of highly variable human SCI.
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Xu D, Zhao W, Wang C, Zhu H, He M, Zhu X, Liu W, Wang F, Fan J, Chen C, Cui D, Cui Z. Up-regulation of TNF Receptor-associated Factor 7 after spinal cord injury in rats may have implication for neuronal apoptosis. Neuropeptides 2018; 71:81-89. [PMID: 30100091 DOI: 10.1016/j.npep.2018.08.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 07/05/2018] [Accepted: 08/07/2018] [Indexed: 10/28/2022]
Abstract
TNF receptor-associated factor 7 (TRAF7), is an E3 ubiquitin ligase for several proteins involved in the activation of TLR-dependent NF-kappaB signaling. TRAF7 links TNF receptor family proteins to signaling pathways, thus participates in regulating cell death and survival mediated by TNF family ligands. To date, the biological function of TRAF7 after spinal cord injury (SCI) is still with limited acquaintance. In this study, we have performed an acute SCI model in adult rats and investigated the dynamic changes of TRAF7 expression in the spinal cord. Our results showed that TRAF7 was up-regulated significantly after SCI, which was paralleled with the levels of the apoptotic protein active caspase-3. Immunofluorescent labeling showed that TRAF7 was co-localizated with active caspase-3 in neurons. To further investigate the function of TRAF7, an apoptosis model was established in primary neuronal cells. When TRAF7 was knocked down by specific short interfering RNA (siRNA), the protein levels of active caspase-3 and the number of apoptotic primary neurons were significantly decreased in our study. Taken together, our findings suggest that the change of TRAF7 protein expression plays a key role in neuronal apoptosis after SCI.
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Affiliation(s)
- Dawei Xu
- Department of Orthopaedics, The Second Affiliated Hospital of Nantong University, Nantong 226001, People's Republic of China
| | - Wei Zhao
- Department of Orthopaedics, The Second Affiliated Hospital of Nantong University, Nantong 226001, People's Republic of China
| | - Chengniu Wang
- Basic Medical Research Centre, Medical College, Nantong University, Nantong 226001, People's Republic of China
| | - Hao Zhu
- Department of Orthopaedics, The Fourth Affiliated Hospital of Nantong University, Yancheng 224005, People's Republic of China
| | - Mingqing He
- Department of Geriatrics, The First Affiliated Hospital of Soochow University, Suzhou 215006, People's Republic of China
| | - Xinhui Zhu
- Department of Orthopaedics, The Second Affiliated Hospital of Nantong University, Nantong 226001, People's Republic of China
| | - Wei Liu
- Department of Orthopaedics, The Second Affiliated Hospital of Nantong University, Nantong 226001, People's Republic of China
| | - Fei Wang
- Department of Orthopaedics, The Second Affiliated Hospital of Nantong University, Nantong 226001, People's Republic of China
| | - Jianbo Fan
- Department of Orthopaedics, The Second Affiliated Hospital of Nantong University, Nantong 226001, People's Republic of China
| | - Chu Chen
- Department of Orthopaedics, The Second Affiliated Hospital of Nantong University, Nantong 226001, People's Republic of China
| | - Daoran Cui
- Department of Orthopaedics, The Second Affiliated Hospital of Nantong University, Nantong 226001, People's Republic of China
| | - Zhiming Cui
- Department of Orthopaedics, The Second Affiliated Hospital of Nantong University, Nantong 226001, People's Republic of China.
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Su CM, Chen CY, Lu T, Sun Y, Li W, Huang YL, Tsai CH, Chang CS, Tang CH. A novel benzofuran derivative, ACDB, induces apoptosis of human chondrosarcoma cells through mitochondrial dysfunction and endoplasmic reticulum stress. Oncotarget 2018; 7:83530-83543. [PMID: 27835579 PMCID: PMC5347786 DOI: 10.18632/oncotarget.13171] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 10/19/2016] [Indexed: 12/15/2022] Open
Abstract
Chondrosarcoma is one of the bone tumor with high mortality in respond to poor radiation and chemotherapy treatment. Here, we analyze the antitumor activity of a novel benzofuran derivative, 2-amino-3-(2-chlorophenyl)-6-(4-dimethylaminophenyl)benzofuran-4-yl acetate (ACDB), in human chondrosarcoma cells. ACDB increased the cell apoptosis of human chondrosarcomas without harm in chondrocytes. ACDB also enhanced endoplasmic reticulum (ER) stress, which was characterized by varieties in the cytosolic calcium levels and induced the expression of glucose-regulated protein (GRP) and calpain. Furthermore, the ACDB-induced chondrosarcoma apoptosis was associated with the upregulation of the B cell lymphoma-2 (Bcl-2) family members including pro- and anti-apoptotic proteins, downregulation of dysfunctional mitochondria that released cytochrome C, and subsequent activation of caspases-3. In addition, the ACDB-mediated cellular apoptosis was suppressed by transfecting cells with glucose-regulated protein (GRP) and calpain siRNA or treating cells with ER stress chelators and caspase inhibitors. Interestingly, animal experiments illustrated a reduction in the tumor volume following ACDB treatment. Together, these results suggest that ACDB may be a novel tumor suppressor of chondrosarcoma, and this study demonstrates that the novel antitumor agent, ACDB, induced apoptosis by mitochondrial dysfunction and ER stress in human chondrosarcoma cells in vitro and in vivo.
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Affiliation(s)
- Chen-Ming Su
- Department of Biomedical Sciences Laboratory, Affiliated Dongyang Hospital of Wenzhou Medical University, Dongyang, Zhejiang, China.,Graduate Institute of Basic Medical Science, China Medical University, Taichung Taiwan
| | - Chien-Yu Chen
- Graduate Institute of Pharmaceutical Chemistry, China Medical University, Taichung, Taiwan
| | - Tingting Lu
- Department of Biomedical Sciences Laboratory, Affiliated Dongyang Hospital of Wenzhou Medical University, Dongyang, Zhejiang, China
| | - Yi Sun
- Department of Biomedical Sciences Laboratory, Affiliated Dongyang Hospital of Wenzhou Medical University, Dongyang, Zhejiang, China
| | - Weimin Li
- Department of Cardiology, Affiliated Dongyang Hospital of Wenzhou Medical University, Dongyang, Zhejiang, China
| | - Yuan-Li Huang
- Department of Biotechnology, College of Health Science, Asia University, Taichung, Taiwan
| | - Chun-Hao Tsai
- School of Medicine, China Medical University, Taichung, Taiwan.,Department of Orthopedic Surgery, China Medical University Hospital, Taichung, Taiwan
| | - Chih-Shiang Chang
- Graduate Institute of Pharmaceutical Chemistry, China Medical University, Taichung, Taiwan
| | - Chih-Hsin Tang
- Graduate Institute of Basic Medical Science, China Medical University, Taichung Taiwan.,Department of Biotechnology, College of Health Science, Asia University, Taichung, Taiwan.,Department of Pharmacology, School of Medicine, China Medical University, Taichung, Taiwan
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Ousman SS, Frederick A, Lim EMF. Chaperone Proteins in the Central Nervous System and Peripheral Nervous System after Nerve Injury. Front Neurosci 2017; 11:79. [PMID: 28270745 PMCID: PMC5318438 DOI: 10.3389/fnins.2017.00079] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 02/03/2017] [Indexed: 12/20/2022] Open
Abstract
Injury to axons of the central nervous system (CNS) and the peripheral nervous system (PNS) is accompanied by the upregulation and downregulation of numerous molecules that are involved in mediating nerve repair, or in augmentation of the original damage. Promoting the functions of beneficial factors while reducing the properties of injurious agents determines whether regeneration and functional recovery ensues. A number of chaperone proteins display reduced or increased expression following CNS and PNS damage (crush, transection, contusion) where their roles have generally been found to be protective. For example, chaperones are involved in mediating survival of damaged neurons, promoting axon regeneration and remyelination and, improving behavioral outcomes. We review here the various chaperone proteins that are involved after nervous system axonal damage, the functions that they impact in the CNS and PNS, and the possible mechanisms by which they act.
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Affiliation(s)
- Shalina S Ousman
- Departments of Clinical Neurosciences and Cell Biology & Anatomy, Hotchkiss Brain Institute, University of Calgary Calgary, AB, Canada
| | - Ariana Frederick
- Departments of Clinical Neurosciences and Cell Biology & Anatomy, Hotchkiss Brain Institute, University of Calgary Calgary, AB, Canada
| | - Erin-Mai F Lim
- Department of Neuroscience, Hotchkiss Brain Institute, University of Calgary Calgary, AB, Canada
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Liu J, Wu W, Hao J, Yu M, Liu J, Chen X, Qian R, Zhang F. PRDM5 Expression and Essential Role After Acute Spinal Cord Injury in Adult Rat. Neurochem Res 2016; 41:3333-3343. [DOI: 10.1007/s11064-016-2066-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 08/29/2016] [Accepted: 09/15/2016] [Indexed: 01/08/2023]
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Zhu X, Zhou Y, Tao R, Zhao J, Chen J, Liu C, Xu Z, Bao G, Zhang J, Chen M, Shen J, Cheng C, Zhang D. Upregulation of PTP1B After Rat Spinal Cord Injury. Inflammation 2016; 38:1891-902. [PMID: 25894283 DOI: 10.1007/s10753-015-0169-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Protein tyrosine phosphatase 1B (PTP1B), a member of the protein tyrosine phosphatase family, attaches to the endoplasmic reticulum (ER) via its C-terminal tail. Previous studies have reported that PTP1B participates in various signal transduction pathways in many human diseases, including diabetes, cancers, osteoporosis, and obesity. It also plays an important role in the ER stress. ER stress induced by spinal cord injury (SCI) was reported to result in cell apoptosis. Till now, the role of PTP1B in the injury of the central nervous system remains unknown. In the present study, we built an adult rat SCI model to investigate the potential role of PTP1B in SCI. Western blot analysis detected a notable alteration of PTP1B expression after SCI. Immunohistochemistry indicated that PTP1B expressed at a low level in the normal spinal cord and greatly increased after SCI. Double immunofluorescence staining revealed that PTP1B immunoreactivity was predominantly increased in neurons following SCI. In addition, SCI resulted in a significant alteration in the level of active caspase-3, caspase-12, and 153/C/EBP homologous transcription factor protein, which were correlated with the upregulation of PTP1B. Co-localization of PTP1B/active caspase-3 was also detected in neurons. Taken together, our findings elucidated the PTP1B expression in the SCI for the first time. These results suggested that PTP1B might be deeply involved in the injury response and probably played an important role in the neuro-pathological process of SCI.
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Affiliation(s)
- Xinhui Zhu
- Department of Osteology, The Second Affiliated Hospital, Nantong University, Nantong, 226001, People's Republic of China
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Expression of Sam68 Associates with Neuronal Apoptosis and Reactive Astrocytes After Spinal Cord Injury. Cell Mol Neurobiol 2016; 37:487-498. [PMID: 27236696 DOI: 10.1007/s10571-016-0384-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 05/18/2016] [Indexed: 01/15/2023]
Abstract
Src-associated in mitosis (Sam68; 68 kDa) is a novel RNA-binding protein that belongs to the signal transduction and activation of RNA family involved in various biological processes. However, the expression and roles of Sam68 in the central nervous system remain unknown. In the present study, we performed a spinal cord injury (SCI) model in adult rats and found a significant increase of Sam68 protein levels in this model, which reached a peak at day 3 and then gradually returned to normal levels at day 14 after SCI. We use immunohistochemistry analysis revealing a widespread distribution of Sam68 in the spinal cord. In addition, double-immunofluorescence staining showed that Sam68 immunoreactivity was found predominantly in neurons and astrocytes. Moreover, colocalization of Sam68/active caspase-3 has been respectively detected in neuronal nuclei, and colocalization of Sam68/PCNA has been detected in glial fibrillary acidic protein. In vitro, we found that depletion of Sam68 by short interfering RNA inhibits neuronal apoptosis and astrocyte proliferation and decreases cyclin D1 protein levels. In conclusion, this is the first study to find the Sam68 expression in SCI. Our results suggest that Sam68 might be illustrated in the apoptosis of neurons and proliferation of astrocytes after SCI. This research will provide new drug targets for clinical treatment of SCI.
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Yang L, Zhang J, Chen J, Jin H, Liu J, Huang S, Cui Z. The Expression of CUGBP1 After Spinal Cord Injury in Rats. Neurochem Res 2015; 40:1966-75. [PMID: 26283512 DOI: 10.1007/s11064-015-1692-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Revised: 07/10/2015] [Accepted: 08/07/2015] [Indexed: 01/30/2023]
Abstract
CUG-binding protein 1, a member of the CELF (CUGBP and embryonic lethal abnormal vision-like factor) family of RNA-binding proteins, is shown to be multifunctional, regulating many posttranscriptional processes including alternative splicing, deadenylation, mRNA decay, and translation. Recently, CUGBP1 is found to represses p27 IRES activity and inhibits expression of endogenous p27 in cultured breast cancer cells. However, the roles of CUGBP1 in central nervous system injury remain unknown. In our study, we performed acute spinal cord injury (SCI) model in adult rats in order to research the expression changes of CUGBP1 in spinal cord. Western blot analysis showed a marked upregulation of CUGBP1 after SCI. Immunohistochemistry analysis revealed a wide distribution of CUGBP1 in the spinal cord. Double immunofluorescence staining indicated that CUGBP1 immunoreactivity was increased predominantly in neurons and astrocytes after SCI. Moreover, colocalization of CUGBP1/proliferating cell nuclear antigen (PCNA) was detected in GFAP positive cells. We also examined the expression profiles of p27, which was up-regulated after SCI. To further understand whether CUGBP1 plays a role in astrocyte proliferation, we applied LPS to induce astrocyte proliferation in vitro. Western blot analysis demonstrated that CUGBP1 expression was positively correlated with PCNA expression, and the p27 expression was negatively correlated with CUGBP1 expression following LPS stimulation. Our results suggest that CUGBP1 might be implicated in the pathophysiology of spinal cord after SCI.
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Affiliation(s)
- Longfei Yang
- Department of Spine Surgery, The Second Affiliated Hospital of Nantong University, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
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Matrix metalloproteinase-1 (MMP-1) expression in rat spinal cord injury model. Cell Mol Neurobiol 2014; 34:1151-63. [PMID: 25073870 DOI: 10.1007/s10571-014-0090-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2014] [Accepted: 07/15/2014] [Indexed: 12/16/2022]
Abstract
Matrix metalloproteinase-1 (MMP-1), a member of the matrix metalloproteinases family, plays an integral role in extracellular matrix degradation and has been reportedly involved in the regulation of the brain or spinal cord traumatic neurovascular remodeling. Although the critical involvement of MMP-1 in the metastasis of tumors has been extensively documented, the role of MMP-1 in the pathology of neurological diseases remains largely elusive. In the present study, we established an adult rat spinal cord injury (SCI) model and investigated a potential role of MMP-1 in the pathological process of SCI. Using Western blot analysis, we identified notable expression change of MMP-1 after SCI. Immunohistochemistry showed that MMP-1 was distributed widely in rat spinal cord. Double immunofluorescence staining revealed that MMP-1 immunoreactivity was predominantly increased in neurons and astrocytes following SCI. Moreover, after injury, colocalization of MMP-1/active caspase-3 in neurons (NeuN-positive), and colocalization of MMP-1/PCNA in astrocytes (GFAP-positive) were clearly observed. We also examined the protein expression of PCNA, active caspase-3, Bcl-2, and Bax and found that the expression of the proteins was closely correlated with that of MMP-1. Taken together, our findings indicate that MMP-1 might play an important role in the regulation of neuronal apoptosis and astrocyte proliferation after SCI.
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Spatiotemporal pattern of TRAF3 expression after rat spinal cord injury. J Mol Histol 2014; 45:541-53. [DOI: 10.1007/s10735-014-9575-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 04/28/2014] [Indexed: 01/05/2023]
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Zhao W, Xu D, Cai G, Zhu X, Qian M, Liu W, Cui Z. Spatiotemporal pattern of RNA-binding motif protein 3 expression after spinal cord injury in rats. Cell Mol Neurobiol 2014; 34:491-9. [PMID: 24570111 DOI: 10.1007/s10571-014-0033-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Accepted: 01/24/2014] [Indexed: 12/19/2022]
Abstract
RNA-binding motif protein 3 (RBM3) belongs to a very small group of cold inducible proteins with anti-apoptotic and proliferative functions. To elucidate the expression and possible function of RBM3 in central nervous system (CNS) lesion and repair, we performed a spinal cord injury (SCI) model in adult rats. Western blot analysis revealed that RBM3 level significantly increased at 1 day after damage, and then declined during the following days. Immunohistochemistry further confirmed that RBM3 immunoactivity was expressed at low levels in gray and white matters in normal condition and increased at 1 day after SCI. Besides, double immunofluorescence staining showed RBM3 was primarily expressed in the neurons and a few of astrocytes in the normal group. While after injury, the expression of RBM3 increased both in neurons and astrocytes at 1 day. We also examined the expression profiles of proliferating cell nuclear antigen (PCNA) and active caspase-3 in injured spinal cords by western blot. Importantly, double immunofluorescence staining revealed that cell proliferation evaluated by PCNA appeared in many RBM3-expressing cells and rare caspase-3 was observed in RBM3-expressing cells at 1 day after injury. Our data suggested that RBM3 might play important roles in CNS pathophysiology after SCI.
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Affiliation(s)
- Wei Zhao
- Department of Orthopaedics, The Second Affiliated Hospital of Nantong University, Nantong, 226001, People's Republic of China
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Up-regulation of Smurf1 after spinal cord injury in adult rats. J Mol Histol 2013; 44:381-90. [DOI: 10.1007/s10735-013-9499-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Accepted: 03/12/2013] [Indexed: 01/16/2023]
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Chen J, Cui Z, Li W, Shen A, Xu G, Bao G, Sun Y, Wang L, Fan J, Zhang J, Yang L, Cui Z. MCM7 expression is altered in rat after spinal cord injury. J Mol Neurosci 2013; 51:82-91. [PMID: 23526403 DOI: 10.1007/s12031-013-0003-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Accepted: 03/11/2013] [Indexed: 10/27/2022]
Abstract
Minichromosome maintenance protein 7 (MCM7), a member of the minichromosome maintenance protein family, is essential for eukaryotic DNA replication initiation and the early stage of the elongation process. MCM7 participates in the cell cycle control of genome duplication. While it is ubiquitously expressed in all tissues, the biological function of MCM7 in the central nervous system is still with limited acquaintance. In the present study, we performed a spinal cord injury (SCI) model in adult rats. Western blotting indicated a marked alteration of MCM7 after SCI. Immunohistochemistry analysis revealed a wide distribution of MCM7 in the spinal cord. Double immunofluorescence staining showed that MCM7 immunoreactivity was increased predominantly in neurons, astrocytes, and microglia after SCI. We also examined the expression profiles of active caspase-3, proliferating cell nuclear antigen (PCNA), and Ki67, whose changes were correlated with the expression profiles of MCM7. Moreover, colocalization of MCM7/active caspase-3 was detected in neuronal nuclei (NeuN), and colocalization of MCM7/PCNA was detected in NeuN, glial fibrillary acidic protein, and CD11b, respectively. Our results suggest that MCM7 might be implicated in the apoptosis of neuron and proliferation of astrocytes and microglia after SCI.
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Affiliation(s)
- Jiajia Chen
- Department of Spine Surgery, The Second Affiliated Hospital of Nantong University, Nantong University, 226001, Nantong, Jiangsu, People's Republic of China
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Upregulation of myelin and lymphocyte protein (MAL) after traumatic spinal cord injury in rats. J Mol Histol 2012. [DOI: 10.1007/s10735-012-9469-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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