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Lin T, Zhao Y, Guo S, Wu Z, Li W, Wu R, Wang Z, Liu W. Apelin-13 Protects Neurons by Attenuating Early-Stage Postspinal Cord Injury Apoptosis In Vitro. Brain Sci 2022; 12:brainsci12111515. [PMID: 36358441 PMCID: PMC9688050 DOI: 10.3390/brainsci12111515] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 10/30/2022] [Accepted: 11/07/2022] [Indexed: 11/10/2022] Open
Abstract
Apelin is a 77-amino-acid peptide that is an endogenous ligand for the G protein-coupled receptor APJ (Apelin receptor, APJ). Apelin-13, as the most bioactive affinity fragment of apelin, plays a role in energy metabolism, myocardial ischemia-reperfusion injury, and the regulation of the inflammatory response during oxidative stress, but its role in spinal cord injury is still unclear. This research identified and verified the differential expression of apelin in rat spinal cord injured tissues and normal spinal cord tissues by transcriptome sequencing in vivo and proved that apelin-13 protects neurons by strengthening autophagy and attenuating early-stage postspinal cord injury apoptosis in vitro. After constructing the model concerning a rat spinal cord hemisection damage, transcriptome sequencing was performed on the injured and normal spinal cord tissues of rats, which identified the differentially expressed gene apelin, with qRT-PCR detecting the representative level of apelin. The oxygen-glucose deprivation (OGD) model of PC12 cells was constructed in vitro to simulate spinal cord injury. The OGD injury times were 2 h, 4 h, 6 h, 8 h, and 12 h, and the non-OGD injury group was used as the control. The expression of apelin at each time point was observed by Western blotting. The expression of apelin was the lowest in the 6 h OGD injury group (p < 0.05). Therefore, the OGD injury time of 6 h was used in subsequent experiments. The noncytotoxic drug concentration of apelin-13 was determined with a Cell Counting Kit-8 (CCK-8) assay. An appropriate dose of apelin-13 (1 μM) significantly improved cell survival (p < 0.05). Thus, subsequent experiments selected a concentration of 1 μM apelin-13 as it significantly increased cell viability. Finally, we divided the experimental groups into four groups according to whether they received drugs (1 μM apelin-13, 24 h) or OGD (6 h): (1) control group: without apelin-13 or OGD injury; (2) apelin-13 group: with apelin-13 but no OGD injury; (3) OGD group: with OGD injury but without apelin-13; and (4) OGD + apelin-13 group: with apelin-13 and OGD injury. The TUNEL assay and flow cytometry results showed that compared with the OGD group, apoptosis in the OGD+Apelin-13 group was significantly reduced (p < 0.001). Determination of cell viability under different conditions by CCK-8 assay results displays that Apelin-13 can significantly improve the cell viability percentage under OGD conditions (p < 0.001). Western blotting results showed that apelin-13 decreased the expression ratios of apoptosis-related proteins Bax/Bcl-2 and cleaved-caspase3/caspase3 (p < 0.05), increasing the key to Beclin1-dependent autophagy pathway expression of the protein Beclin1. This finding indicates that apelin-13 protects neurons by strengthening autophagy and attenuating early-stage postspinal cord injury apoptosis in vitro.
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Affiliation(s)
| | | | | | | | | | | | | | - Wenge Liu
- Correspondence: ; Tel.: +86-0591-833-578-96
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2
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Rahimi B, Aliaghaei A, Ramezani F, Behroozi Z, Nasirinezhad F. Sertoli cell transplantation attenuates microglial activation and inhibits TRPC6 expression in neuropathic pain induced by spinal cord injury. Physiol Behav 2022; 251:113807. [PMID: 35427673 DOI: 10.1016/j.physbeh.2022.113807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 03/10/2022] [Accepted: 04/08/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Cell therapy is a promising treatment method for relieving neuropathic pain caused by spinal cord injuries (SCI). Sertoli cells (SCs) are an attractive choice given their demonstrated secretion of growth factors and immunosuppressant effect. This study mechanistically characterizes the analgesic effect of SCs transplantation. METHODS The clip compression SCI model was carried out on the T12-T13 level in male Wistar rats. One-week post-SCI, SCs were transplanted into the site of injury. Animals underwent Basso, Beattie, and Bresnahan locomotor scoring, mechanical allodynia, and thermal hyperalgesia on a weekly basis for a duration of six weeks. Histological examination of the spinal cord and molecular evaluation of Iba-1, P2Y4, TRPC6, and P-mTOR were performed. SCs survival, measured by anti-Müllerian hormone expression in the spinal cord. RESULTS Animals that received SCs transplantation showed improvement in motor function recovery and pain relief. Furthermore, a cavity was significantly decreased in the transplanted animals (p = 0.0024), the expression level of TRPC6 and caspase3 and the number of activated microglia decreased compared to the SCI animals, and p-mTOR and P2Y4R expression remarkably increased compared to the SCI group. CONCLUSION SCs transplantation produces an analgesic effect which may represent a promising treatment for SCI-induced chronic pain.
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Affiliation(s)
- Behnaz Rahimi
- Department of Physiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Abbas Aliaghaei
- Hearing Disorders Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Ramezani
- Physiology Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Zahra Behroozi
- Physiology Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Farinaz Nasirinezhad
- Department of Physiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran; Physiology Research Center, Iran University of Medical Sciences, Tehran, Iran; Center for experimental and comparative study, Iran university of medical sciences, Tehran, Iran.
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3
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Deng Q, Ma L, Chen T, Yang Y, Ma Y, Ma L. NF-κB 1-induced LINC00665 regulates inflammation and apoptosis of neurons caused by spinal cord injury by targeting miR-34a-5p. Neurol Res 2021; 43:418-427. [PMID: 33435858 DOI: 10.1080/01616412.2020.1866373] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Background: Spinal cord injury (SCI) has high disability rate and low cure rate, which frustrates the patients and brings a heavy burden to their families. This study aimed to explore whether NF-κB1 could induce the expression of LINC00665 and form a feedback loop with miR-34a-5p to regulate inflammation and apoptosis of neurons. Results: Basso, Beattie, and Bresnahan (BBB) scoring was decreased, damage for spinal cord tissue was aggravated and neuron number was decreased in SCI rats. The levels of TNF-α, IL-1β and IL-6 in serum and the expression of LINC00665 and NF-κB1 in spinal cord tissues were all increased in SCI rats. After LPS induction, PC12 cell viability was decreased. The expression of LINC00665 and NF-κB1 in LPS-induced PC12 cells was increased, which was partially reversed by BAY11-7082 (NF-κB inhibitor). Inhibition of LINC00665 improved cell viability, suppressed apoptosis and inflammation and down-regulated the NF-κB1 expression in LPS-induced PC12 cells. Furthermore, miR-34a-5p expression was decreased in LPS-induced PC12 cells, which could be promoted by inhibition of LINC00665. miR-34a-5p inhibitor restrained the effect of inhibition of LINC00665 on NF-κB1 expression in LPS-induced PC12 cells. Conclusion: inhibition of LINC00665 improved cell viability, suppressed apoptosis and inflammation in LPS-induced PC12 cells, and the NF-κB1/LINC00665/miR-34a-5ploop might be a useful therapeutic target in SCI treatment.
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Affiliation(s)
- Qilong Deng
- Rehabilitation Medical Center, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Linhai, Zhejiang, China.,Rehabilitation Medical Center, Luqiao Hospital, Taizhou Enze Medical Center (Group), Taizhou, Zhejiang, China
| | - Lili Ma
- Rehabilitation Medical Center, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Linhai, Zhejiang, China.,Rehabilitation Medical Center, Luqiao Hospital, Taizhou Enze Medical Center (Group), Taizhou, Zhejiang, China
| | - Ting Chen
- Rehabilitation Medical Center, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Linhai, Zhejiang, China.,Rehabilitation Medical Center, Luqiao Hospital, Taizhou Enze Medical Center (Group), Taizhou, Zhejiang, China
| | - Yu Yang
- Rehabilitation Medical Center, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Linhai, Zhejiang, China.,Rehabilitation Medical Center, Luqiao Hospital, Taizhou Enze Medical Center (Group), Taizhou, Zhejiang, China
| | - Yuetao Ma
- Rehabilitation Medical Center, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Linhai, Zhejiang, China.,Rehabilitation Medical Center, Luqiao Hospital, Taizhou Enze Medical Center (Group), Taizhou, Zhejiang, China
| | - Lizhong Ma
- Rehabilitation Medical Center, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical University, Linhai, Zhejiang, China.,Rehabilitation Medical Center, Luqiao Hospital, Taizhou Enze Medical Center (Group), Taizhou, Zhejiang, China
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4
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Ren X, Wan C, Niu Y. Overexpression of lncRNA TCTN2 protects neurons from apoptosis by enhancing cell autophagy in spinal cord injury. FEBS Open Bio 2019; 9:1223-1231. [PMID: 31050183 PMCID: PMC6609579 DOI: 10.1002/2211-5463.12651] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 01/29/2019] [Accepted: 05/02/2019] [Indexed: 12/11/2022] Open
Abstract
Neuronal apoptosis is the main pathological feature of spinal cord injury (SCI), while autophagy contributes to ameliorating neuronal damage via inhibition of apoptosis. Here, we investigated the role of tectonic family member 2 (TCTN2) long non-coding RNA on apoptosis and autophagy in SCI. TCTN2 was down-regulated in the spinal cord tissues of a rat model of SCI and in oxygen-glucose deprivation-induced hypoxic SY-SH-5Y cells, while microRNA-216b (miR-216b) was up-regulated. Overexpression of TCTN2 reduced neuron apoptosis by inducing autophagy, and TCTN2 was observed to negatively regulate miR-216b. Furthermore, TCTN2 promoted autophagy to repress apoptosis through the miR-216b-Beclin-1 pathway, and overexpression of TCTN2 improved neurological function in the SCI rat model. In summary, our data suggest that TCTN2 enhances autophagy by targeting the miR-216b-Beclin-1 pathway, thereby ameliorating neuronal apoptosis and relieving spinal cord injury.
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Affiliation(s)
- Xiao‐dong Ren
- Department of RehabilitationThe General HospitalTianjin Medical UniversityChina
| | - Chun‐xiao Wan
- Department of RehabilitationThe General HospitalTianjin Medical UniversityChina
| | - Ya‐li Niu
- Department of RehabilitationThe General HospitalTianjin Medical UniversityChina
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5
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Chen XB, Wang ZL, Yang QY, Zhao FY, Qin XL, Tang XE, Du JL, Chen ZH, Zhang K, Huang FJ. Diosgenin Glucoside Protects against Spinal Cord Injury by Regulating Autophagy and Alleviating Apoptosis. Int J Mol Sci 2018; 19:ijms19082274. [PMID: 30072674 PMCID: PMC6121626 DOI: 10.3390/ijms19082274] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 08/01/2018] [Accepted: 08/01/2018] [Indexed: 12/25/2022] Open
Abstract
Spinal cord injury (SCI) is a severe traumatic lesion of central nervous system (CNS) with only a limited number of restorative therapeutic options. Diosgenin glucoside (DG), a major bioactive ingredient of Trillium tschonoskii Max., possesses neuroprotective effects through its antioxidant and anti-apoptotic functions. In this study, we investigated the therapeutic benefit and underlying mechanisms of DG treatment in SCI. We found that in Sprague-Dawley rats with traumatic SCI, the expressions of autophagy marker Light Chain 3 (LC3) and Beclin1 were decreased with concomitant accumulation of autophagy substrate protein p62 and ubiquitinated proteins, indicating an impaired autophagic activity. DG treatment, however, significantly attenuated p62 expression and upregulated the Rheb/mTOR signaling pathway (evidenced as Ras homolog enriched in brain) due to the downregulation of miR-155-3p. We also observed significantly less tissue injury and edema in the DG-treated group, leading to appreciable functional recovery compared to that of the control group. Overall, the observed neuroprotection afforded by DG treatment warrants further investigation on its therapeutic potential in SCI.
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Affiliation(s)
- Xian-Bing Chen
- West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610041, China.
- College of Medicine, Hubei University for Nationalities, Enshi 445000, China.
| | - Zi-Li Wang
- College of Medicine, Hubei University for Nationalities, Enshi 445000, China.
| | - Qing-Yu Yang
- College of Medicine, Hubei University for Nationalities, Enshi 445000, China.
| | - Fang-Yu Zhao
- College of Medicine, Hubei University for Nationalities, Enshi 445000, China.
| | - Xiao-Li Qin
- College of Medicine, Hubei University for Nationalities, Enshi 445000, China.
| | - Xian-E Tang
- College of Medicine, Hubei University for Nationalities, Enshi 445000, China.
| | - Jun-Long Du
- College of Medicine, Hubei University for Nationalities, Enshi 445000, China.
| | - Zong-Hai Chen
- College of Medicine, Hubei University for Nationalities, Enshi 445000, China.
| | - Kui Zhang
- West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610041, China.
| | - Fei-Jun Huang
- West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu 610041, China.
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6
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Sarkis GA, Mangaonkar MD, Moghieb A, Lelling B, Guertin M, Yadikar H, Yang Z, Kobeissy F, Wang KKW. The Application of Proteomics to Traumatic Brain and Spinal Cord Injuries. Curr Neurol Neurosci Rep 2017; 17:23. [DOI: 10.1007/s11910-017-0736-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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7
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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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8
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Wang S, Ren D. Allicin protects traumatic spinal cord injury through regulating the HSP70/Akt/iNOS pathway in mice. Mol Med Rep 2016; 14:3086-92. [PMID: 27573340 PMCID: PMC5042739 DOI: 10.3892/mmr.2016.5651] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2015] [Accepted: 06/07/2016] [Indexed: 12/22/2022] Open
Abstract
Allicin is a major component of garlic, extracted as an oily liquid. The present study was designed to investigate the beneficial effects of allicin on traumatic spinal cord injury (TSCI) in mice, and whether the effects are mediated via regulation of the heat shock protein 70 (HSP70), v-akt murine thymoma viral oncogene homolog 1 (Akt) and inducible nitric oxide synthase (iNOS) pathways. Adult BALB/c mice (30–40 g) received a laminectomy at the T9 vertebral level as a model of TSCI. In the present study, treatment of the TSCI mice with allicin significantly increased their Basso, Beattie and Bresnahan (BBB) scores (P<0.01) and reduced the spinal cord water content (P<0.01). This protective effect was associated with the inhibition of oxidative stress and inflammatory responses in TSCI mice. Western blot analysis demonstrated that allicin increased the protein levels of HSP70, increased the phosphorylation of Akt and reduced the iNOS protein expression levels in TSCI mice. Additionally, treatment with allicin significantly reduced the levels of ROS and enhanced the NADH levels in TSCI mice. Collectively, these data demonstrate that the effects of allicin on TSCI are mediated via regulation of the HSP70, Akt and iNOS pathways in mice.
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Affiliation(s)
- Shunyi Wang
- Department of Orthopedics, The First Central Hospital of Baoding, Baoding, Hebei 071000, P.R. China
| | - Dongliang Ren
- Department of Orthopedics, The First Central Hospital of Baoding, Baoding, Hebei 071000, P.R. China
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9
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Wang Y, Li F, Zhang G, Kang L, Guan H. Ultraviolet-B induces ERCC6 repression in lens epithelium cells of age-related nuclear cataract through coordinated DNA hypermethylation and histone deacetylation. Clin Epigenetics 2016; 8:62. [PMID: 27231489 PMCID: PMC4880862 DOI: 10.1186/s13148-016-0229-y] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 05/18/2016] [Indexed: 01/22/2023] Open
Abstract
Background Ultraviolet-B (UVB) exposure attributes to the formation of age-related nuclear cataract (ARNC), which is mediated with DNA damage. DNA damage, an important factor for pathogenesis of ARNC, is induced by UVB, and is generally resolved by the nucleotide excision repair (NER) repair mechanism. Cockayne syndrome complementation group B (CSB) protein coded by ERCC6 is a vital component for NER. However, we found no association between selected ERCC6 polymorphisms and ARNC. In this study, we investigated whether UVB exposure could alter ERCC6 expression and the process could involve epigenetic changes of DNA methylation and/or histone acetylation of ERCC6 in the lens epithelial cells (LECs). We also assessed the involvement of those coordinated changes in lens tissue from ARNC patients. Results mRNA and protein expression of ERCC6 in lens tissue (LECs) were lower in ARNCs than those in the controls. This reduction corresponded to methylation of a CpG site at the ERCC6 promoter and histone modifications (methylation and acetylation) nearby this site. UVB-treated human lens epithelium B3 (HLE-B3) and 239T cell presented (1) increased apoptosis, suggesting reduced UV-damage repair, (2) hypermethylation of the CpG site located at position -441 (relative to transcription start site) within the binding region for transcriptional factor Sp1 in the ERCC6 promoter, (3) the enhancement of histone H3K9 deacetylation, (4) induction in DNA methyltransferases 3b (DNMT3b) and histone deacetylase1 (HDAC1) associated to the CpG site of ERCC6 by CHIP assay. Conclusions These findings suggest an orchestrated mechanism triggered by UVB radiation where the concurrent association of specific hypermethylation CpG site, H3K9 deacetylation of ERCC6, and repression of ERCC6 gene expression. Taken together, with the similar changes in the lens tissue from ARNC patients, our data unveiled a possible mechanism of epigenetic modification of DNA repair gene in the pathogenesis of ARNC. Electronic supplementary material The online version of this article (doi:10.1186/s13148-016-0229-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yong Wang
- Eye Institute, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong, Jiangsu China
| | - Fei Li
- Ophthalmology Department, Chengdu Fifth People's Hospital, Chengdu, Sichuan China
| | - Guowei Zhang
- Eye Institute, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong, Jiangsu China
| | - Lihua Kang
- Eye Institute, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong, Jiangsu China
| | - Huaijin Guan
- Eye Institute, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong, Jiangsu China
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10
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Ferrari R, Forabosco P, Vandrovcova J, Botía JA, Guelfi S, Warren JD, Momeni P, Weale ME, Ryten M, Hardy J. Frontotemporal dementia: insights into the biological underpinnings of disease through gene co-expression network analysis. Mol Neurodegener 2016; 11:21. [PMID: 26912063 PMCID: PMC4765225 DOI: 10.1186/s13024-016-0085-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 02/15/2016] [Indexed: 12/31/2022] Open
Abstract
Background In frontotemporal dementia (FTD) there is a critical lack in the understanding of biological and molecular mechanisms involved in disease pathogenesis. The heterogeneous genetic features associated with FTD suggest that multiple disease-mechanisms are likely to contribute to the development of this neurodegenerative condition. We here present a systems biology approach with the scope of i) shedding light on the biological processes potentially implicated in the pathogenesis of FTD and ii) identifying novel potential risk factors for FTD. We performed a gene co-expression network analysis of microarray expression data from 101 individuals without neurodegenerative diseases to explore regional-specific co-expression patterns in the frontal and temporal cortices for 12 genes (MAPT, GRN, CHMP2B, CTSC, HLA-DRA, TMEM106B, C9orf72, VCP, UBQLN2, OPTN, TARDBP and FUS) associated with FTD and we then carried out gene set enrichment and pathway analyses, and investigated known protein-protein interactors (PPIs) of FTD-genes products. Results Gene co-expression networks revealed that several FTD-genes (such as MAPT and GRN, CTSC and HLA-DRA, TMEM106B, and C9orf72, VCP, UBQLN2 and OPTN) were clustering in modules of relevance in the frontal and temporal cortices. Functional annotation and pathway analyses of such modules indicated enrichment for: i) DNA metabolism, i.e. transcription regulation, DNA protection and chromatin remodelling (MAPT and GRN modules); ii) immune and lysosomal processes (CTSC and HLA-DRA modules), and; iii) protein meta/catabolism (C9orf72, VCP, UBQLN2 and OPTN, and TMEM106B modules). PPI analysis supported the results of the functional annotation and pathway analyses. Conclusions This work further characterizes known FTD-genes and elaborates on their biological relevance to disease: not only do we indicate likely impacted regional-specific biological processes driven by FTD-genes containing modules, but also do we suggest novel potential risk factors among the FTD-genes interactors as targets for further mechanistic characterization in hypothesis driven cell biology work. Electronic supplementary material The online version of this article (doi:10.1186/s13024-016-0085-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Raffaele Ferrari
- Department of Molecular Neuroscience, Institute of Neurology, University College London, Russell Square House, 9-12 Russell Square House, London, WC1N 3BG, UK.
| | - Paola Forabosco
- Istituto di Ricerca Genetica e Biomedica, Cittadella Universitaria di Cagliari, 09042, Monserrato, Sardinia, Italy.
| | - Jana Vandrovcova
- Department of Molecular Neuroscience, Institute of Neurology, University College London, Russell Square House, 9-12 Russell Square House, London, WC1N 3BG, UK. .,King's College London, Department of Medical & Molecular Genetics, Guy's Hospital, London, SE1 9RT, UK.
| | - Juan A Botía
- Department of Molecular Neuroscience, Institute of Neurology, University College London, Russell Square House, 9-12 Russell Square House, London, WC1N 3BG, UK. .,King's College London, Department of Medical & Molecular Genetics, Guy's Hospital, London, SE1 9RT, UK.
| | - Sebastian Guelfi
- Department of Molecular Neuroscience, Institute of Neurology, University College London, Russell Square House, 9-12 Russell Square House, London, WC1N 3BG, UK. .,King's College London, Department of Medical & Molecular Genetics, Guy's Hospital, London, SE1 9RT, UK.
| | - Jason D Warren
- Dementia Research Centre, UCL Institute of Neurology, University College London, London, WC1N 3BG, UK.
| | | | | | - Michael E Weale
- King's College London, Department of Medical & Molecular Genetics, Guy's Hospital, London, SE1 9RT, UK.
| | - Mina Ryten
- Department of Molecular Neuroscience, Institute of Neurology, University College London, Russell Square House, 9-12 Russell Square House, London, WC1N 3BG, UK. .,King's College London, Department of Medical & Molecular Genetics, Guy's Hospital, London, SE1 9RT, UK.
| | - John Hardy
- Department of Molecular Neuroscience, Institute of Neurology, University College London, Russell Square House, 9-12 Russell Square House, London, WC1N 3BG, UK.
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11
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Chen M, Ni Y, Liu Y, Xia X, Cao J, Wang C, Mao X, Zhang W, Chen C, Chen X, Wang Y. Spatiotemporal Expression of EAPP Modulates Neuronal Apoptosis and Reactive Astrogliosis After Spinal Cord Injury. J Cell Biochem 2016; 116:1381-90. [PMID: 25704466 DOI: 10.1002/jcb.25096] [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: 11/07/2014] [Accepted: 01/23/2015] [Indexed: 11/11/2022]
Abstract
E2F-associated phosphoprotein (EAPP) is a novel E2F binding protein that interacts with the activating members of the E2F transcription factors family and involved in various biological processes. However, the expression and function of EAPP in central nervous system (CNS) are still unknown. In this study, we performed an acute spinal cord injury (SCI) model in adult rats, we found that EAPP protein levels were significantly increased and reached a peak at day 3, and then gradually returned to normal level at day 14 after spinal cord injury and we observed that the expression of EAPP is enhanced in the gray and white matter. Spatially, increased levels of EAPP were striking in neurons and astrocytes. Moreover, colocalization of EAPP/active caspase-3 was detected in neurons, and colocalization of EAPP/proliferating cell nuclear antigen (PCNA) was detected in astrocytes after spinal cord injury. These results indicated that EAPP might play an important role in neuronal apoptosis and reactive astrogliosis. Furthermore in vitro, EAPP depletion by siRNA inhibited astrocyte proliferation, migration and CDK4/cyclinD1 expression. Meanwhile, EAPP knockdown also reduce neuronal apoptosis and cell cycle related proteins. Which indicated that EAPP might integrate cell cycle progression and play a crucial role in cell proliferation and apoptosis. Taken together, we speculated that EAPP was involved in biochemical and physiological responses after SCI.
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Affiliation(s)
- Minhao Chen
- Department of Orthopaedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu, PR China
| | - Yingjie Ni
- Department of Orthopaedics, Xishan People' Hospital, Wuxi, Jiangsu, PR China
| | - Yonghua Liu
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Medical College, Nantong University, Nantong, Jiangsu, PR China
| | - Xiaopeng Xia
- Department of Orthopaedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu, PR China
| | - Jianhua Cao
- Department of Orthopaedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu, PR China
| | - Chengniu Wang
- Basic Medical Research Centre, Medical School, Nantong University, Nantong, Jiangsu, PR China
| | - Xingxing Mao
- Department of Orthopaedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu, PR China
| | - Weidong Zhang
- Department of Orthopaedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu, PR China
| | - Chen Chen
- Department of Orthopaedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu, PR China
| | - Xinlei Chen
- Department of Orthopaedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu, PR China
| | - Youhua Wang
- Department of Orthopaedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu, PR China
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12
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Mao X, Zhang D, Tao T, Liu X, Sun X, Wang Y, Shen A. O-GlcNAc glycosylation of p27(kip1) promotes astrocyte migration and functional recovery after spinal cord contusion. Exp Cell Res 2015; 339:197-205. [PMID: 26562163 DOI: 10.1016/j.yexcr.2015.11.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 11/06/2015] [Accepted: 11/07/2015] [Indexed: 11/16/2022]
Abstract
Glial scar formation derived from astrocyte proliferation and migration influences the functional recovery after spinal cord injury. Cyclin-dependent kinase inhibitor p27(kip1), whose activity is closely related to its phosphorylation state, reportedly regulates astrocyte proliferation and migration. In this study, we reported that p27(Kip1) undergoes O-GlcNAc modification at Ser 2, Ser 110 and Thr 197. Inhibiting O-GlcNAcylation on Ser 2 by gene mutation (S2A) attenuated the phosphorylation of Ser 10, and vice versa. Interestingly, compared with wild type p27(Kip1), S2A p27(Kip1) displayed a decreased interaction with CRM1 and reduced nuclear export following serum starvation and release. In addition, the interaction between stathmin and S2A p27(Kip1) was also decreased. Cytoskeletal proteins microtubules appeared high density in astrocytes transfected with S2A p27(Kip1) especially at the leading edge of the scratch wound. Accordingly, scratch-wound assay revealed that the motility of astrocytes transfected with S2A p27(Kip1) was faster than that of control. Finally, we injected lentiviral vectors immediately after spinal cord contusion, and found the lesion volume of the rat injected with S2A p27(Kip1) was smaller than that of rat injected with wild type p27(Kip1). Besides, the BBB and CBS behavioral tests showed greater functional recovery in S2A p27(Kip1) treated rats. Taken together, our findings revealed a novel function of O-GlcNAc modification of p27(Kip1) in mediating astrocytes migration and functional recovery after spinal cord contusion.
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Affiliation(s)
- Xingxing Mao
- Department of Orthopedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China; Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, Jiangsu Province, China
| | - Dongmei Zhang
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, Jiangsu Province, China
| | - Tao Tao
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, Jiangsu Province, China
| | - Xiaojuan Liu
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, Jiangsu Province, China
| | - Xiaolei Sun
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, Jiangsu Province, China
| | - Youhua Wang
- Department of Orthopedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China.
| | - Aiguo Shen
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, Jiangsu Province, China; Coinnovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu Province, China.
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13
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Lentiviral Vector-Mediated p27kip1 Expression Facilitates Recovery After Spinal Cord Injury. Mol Neurobiol 2015; 53:6043-6056. [DOI: 10.1007/s12035-015-9498-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 10/19/2015] [Indexed: 10/22/2022]
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14
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Duan C, Liu Y, Lu L, Cai R, Xue H, Mao X, Chen C, Qian R, Zhang D, Shen A. CDK14 Contributes to Reactive Gliosis via Interaction with Cyclin Y in Rat Model of Spinal Cord Injury. J Mol Neurosci 2015; 57:571-9. [DOI: 10.1007/s12031-015-0639-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Accepted: 08/06/2015] [Indexed: 01/03/2023]
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