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Wang J, Tian F, Cao L, Du R, Tong J, Ding X, Yuan Y, Wang C. Macrophage polarization in spinal cord injury repair and the possible role of microRNAs: A review. Heliyon 2023; 9:e22914. [PMID: 38125535 PMCID: PMC10731087 DOI: 10.1016/j.heliyon.2023.e22914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 11/17/2023] [Accepted: 11/22/2023] [Indexed: 12/23/2023] Open
Abstract
The prevention, treatment, and rehabilitation of spinal cord injury (SCI) have always posed significant medical challenges. After mechanical injury, disturbances in microcirculation, edema formation, and the generation of free radicals lead to additional damage, impeding effective repair processes and potentially exacerbating further dysfunction. In this context, inflammatory responses, especially the activation of macrophages, play a pivotal role. Different phenotypes of macrophages have distinct effects on inflammation. Activation of classical macrophage cells (M1) promotes inflammation, while activation of alternative macrophage cells (M2) inhibits inflammation. The polarization of macrophages is crucial for disease healing. A non-coding RNA, known as microRNA (miRNA), governs the polarization of macrophages, thereby reducing inflammation following SCI and facilitating functional recovery. This study elucidates the inflammatory response to SCI, focusing on the infiltration of immune cells, specifically macrophages. It examines their phenotype and provides an explanation of their polarization mechanisms. Finally, this paper introduces several well-known miRNAs that contribute to macrophage polarization following SCI, including miR-155, miR-130a, and miR-27 for M1 polarization, as well as miR-22, miR-146a, miR-21, miR-124, miR-223, miR-93, miR-132, and miR-34a for M2 polarization. The emphasis is placed on their potential therapeutic role in SCI by modulating macrophage polarization, as well as the present developments and obstacles of miRNA clinical therapy.
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Affiliation(s)
- Jiawei Wang
- School and Hospital of Stomatology, Shanxi Medical University, Shanxi Taiyuan, China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Shanxi Taiyuan, China
| | - Feng Tian
- School and Hospital of Stomatology, Shanxi Medical University, Shanxi Taiyuan, China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Shanxi Taiyuan, China
| | - Lili Cao
- School and Hospital of Stomatology, Shanxi Medical University, Shanxi Taiyuan, China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Shanxi Taiyuan, China
| | - Ruochen Du
- Experimental Animal Center, Shanxi Medical University, Shanxi Taiyuan, China
| | - Jiahui Tong
- School and Hospital of Stomatology, Shanxi Medical University, Shanxi Taiyuan, China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Shanxi Taiyuan, China
| | - Xueting Ding
- Experimental Animal Center, Shanxi Medical University, Shanxi Taiyuan, China
| | - Yitong Yuan
- Experimental Animal Center, Shanxi Medical University, Shanxi Taiyuan, China
| | - Chunfang Wang
- School and Hospital of Stomatology, Shanxi Medical University, Shanxi Taiyuan, China
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Shanxi Taiyuan, China
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MicroRNA-34c promotes neuronal recovery in rats with spinal cord injury through the C-X-C motif ligand 14/Janus kinase 2/signal transducer and activator of transcription-3 axis. Chin Med J (Engl) 2021; 133:2177-2185. [PMID: 32826607 PMCID: PMC7508434 DOI: 10.1097/cm9.0000000000001022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Supplemental Digital Content is available in the text Background Developing effective spinal cord repair strategies for spinal cord injury (SCI) is of great importance. Emerging evidence suggests that microRNAs (miRNAs) are closely linked to SCI recovery. This study aimed to investigate the function of miR-34c in the neuronal recovery in rats with SCI. Methods A rat model with SCI was established. Differentially expressed miRNAs were identified by a microarray analysis. MiR-34c expression in rats was measured by reverse transcription quantitative polymerase chain reaction. Altered expression of miR-34c or C-X-C motif ligand 14 (CXCL14) was introduced in SCI rats to measure their roles in neuronal recovery. Western blot analysis was performed to determine the phosphorylation of Janus kinase 2 (JAK2) and signal transducer and activator of transcription-3 (STAT3). Neuronal apoptosis in rat spinal cord tissues was detected. The concentrations of SCI recovery-related proteins thyrotropin releasing hormone (TRH), prostacyclin (PGI2), and ganglioside (GM) were evaluated by enzyme-linked immunosorbent assay. Data were analyzed using a t-test with a one-way or two-way analysis of variance. Results Rats with SCI presented decreased grip strength (112.03 ± 10.64 vs. 17.32 ± 1.49 g, P < 0.01), decreased miR-34c expression (7 days: 3.78 ± 0.44 vs. 0.95 ± 0.10, P < 0.05), and increased CXCL14 expression (7 days: 0.61 ± 0.06 vs. 2.91 ± 0.27, P < 0.01). MiR-34c was found to directly bind to CXCL14. Overexpression of miR-34c increased grip strength (11.23 ± 1.08 vs. 31.26 ± 2.99 g, P < 0.01) and reduced neuronal apoptosis in spinal cord tissues (53.61% ± 6.07% vs. 24.59% ± 3.32%, P < 0.01), and silencing of CXCL14 also increased the grip strength (12.76 ± 1.13 vs. 29.77 ± 2.75 g, P < 0.01) and reduced apoptosis in spinal cord tissues (55.74% ± 6.24% vs. 26.75% ± 2.84%, P < 0.01). In addition, miR-34c upregulation or CXCL14 downregulation increased the concentrations of TRH, PGI2, and GM, and reduced phosphorylation of JAK2 and STAT3 in rats with SCI (all P < 0.01). Conclusion The study provided evidence that miR-34c could promote neuronal recovery in rats with SCI through inhibiting CXCL14 expression and inactivating the JAK2/STAT3 pathway. This study may offer new insights into SCI treatment.
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Li P, Jia Y, Tang W, Cui Q, Liu M, Jiang J. Roles of Non-coding RNAs in Central Nervous System Axon Regeneration. Front Neurosci 2021; 15:630633. [PMID: 33597844 PMCID: PMC7882506 DOI: 10.3389/fnins.2021.630633] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 01/05/2021] [Indexed: 12/11/2022] Open
Abstract
Axons in the central nervous system often fail to regenerate after injury due to the limited intrinsic regeneration ability of the central nervous system (CNS) and complex extracellular inhibitory factors. Therefore, it is of vital importance to have a better understanding of potential methods to promote the regeneration capability of injured nerves. Evidence has shown that non-coding RNAs play an essential role in nerve regeneration, especially long non-coding RNA (lncRNA), microRNA (miRNA), and circular RNA (circRNA). In this review, we profile their separate roles in axon regeneration after CNS injuries, such as spinal cord injury (SCI) and optic nerve injury. In addition, we also reveal the interactive networks among non-coding RNAs.
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Affiliation(s)
| | | | | | | | | | - Jingjing Jiang
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, China
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Yang LZ, Lei CC, Zhao YP, Sun HW, Yu QH, Yang EJ, Zhan X. MicroRNA-34c-3p target inhibiting NOTCH1 suppresses chemosensitivity and metastasis of non-small cell lung cancer. J Int Med Res 2021; 48:300060520904847. [PMID: 32228202 PMCID: PMC7133404 DOI: 10.1177/0300060520904847] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Background Chemotherapy is the standard treatment for non-small cell lung cancer (NSCLC). However, chemoresistance frequently occurs, making the treatment of NSCLC more difficult. Method We combined clinical and experimental studies to establish the role of microRNA (miR)-34c in NSCLC metastasis and chemoresistance. Results MiR-34c expression was significantly decreased in patients with NSCLC who showed a poor chemoresponse and metastasis. Overexpression of miR-34c sensitized NSCLC cells to paclitaxel and cisplatin both in vitro and in vivo. Furthermore, we found that NOTCH1 was target of miR-34c in NSCLC cells and played a key role in the effects of miR-34c on NSCLC. Conclusion NSCLC metastasis and chemoresistance are suppressed though the miR-34c/NOTCH1 axis. MiR-34c has important implications in the development of therapeutic strategies for metastasis and chemoresistance in NSCLC.
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Affiliation(s)
- Lin-Zhu Yang
- Department of Thoracic Surgery, The First Affiliated Hospital of Kunming Medical University, Yunnan, China
| | - Chang-Cheng Lei
- Department of Thoracic Surgery, The First Affiliated Hospital of Kunming Medical University, Yunnan, China
| | - Yun-Ping Zhao
- Department of Thoracic Surgery, The First Affiliated Hospital of Kunming Medical University, Yunnan, China
| | - Hong-Wen Sun
- Department of Thoracic Surgery, The First Affiliated Hospital of Kunming Medical University, Yunnan, China
| | - Qing-He Yu
- Department of Thoracic Surgery, The First Affiliated Hospital of Kunming Medical University, Yunnan, China
| | - En-Ji Yang
- Department of Thoracic Surgery, The First Affiliated Hospital of Kunming Medical University, Yunnan, China
| | - Xi Zhan
- Department of Anesthesiology, The First Affiliated Hospital of Kunming Medical University, Yunnan, China
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Qi L, Jiang-Hua M, Ge-Liang H, Qing C, Ya-Ming L. MiR-34a Inhibits Spinal Cord Injury and Blocks Spinal Cord Neuron Apoptosis by Activating Phatidylinositol 3-kinase (PI3K)/AKT Pathway Through Targeting CD47. Curr Neurovasc Res 2020; 16:373-381. [PMID: 31490756 DOI: 10.2174/1567202616666190906102343] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 07/27/2019] [Accepted: 08/05/2019] [Indexed: 12/30/2022]
Abstract
OBJECTIVE Dysregulation of miR-34a has been reported for its implication in neuronal development. This study aims to explore the effect and possible mechanism of miR-34a on neuron apoptosis induced by Spinal Cord Injury (SCI). MATERIALS AND METHODS SCI model was established using Allen's weight-drop method and rats in the sham group were performed with laminectomy without weight-drop injury. Basso Bcattie Bresnahan (BBB) rating scale was applied to evaluate the locomotor function of rats. Pathological changes of spinal cord tissues in SCI rats were observed after hematoxylin and eosin (HE) staining. Rats were separately injected with miR-34a agomir, miR-34a agomir NC, si-CD47 and si- CD47 NC before their spinal cord tissues were collected for terminal-deoxynucleoitidyl Transferase Mediated nick end labeling (TUNEL) staining. Expressions of miR-34a, si-CD47, apoptosis related proteins and AKT pathway related proteins were measured by quantitative reverse transcription- polymerase chain reaction (qRT-PCR) and western blot. RESULTS SCI rat models were successfully established evidenced by decreased BBB scores and HE staining. Injection of miR-34a agomir and/or si-CD47 could suppress neuron cell apoptosis, with deceased apoptotic index (AI) and pro-apoptotic protein (cleaved caspase-3 and Bax) levels, and increased expressions of anti-apoptotic proteins (Bcl-2 and Mcl-1). Phosphorylated levels of phatidylinositol 3-kinase (PI3K) and AKT were further increased in rats injected with miR-34a agomir and si-CD47, compared with miR-34a agomir or si-CD47 injection alone. CONCLUSION MiR-34a can downregulate CD47 expression to activate PI3K/AKT signal pathway, and thus inhibit SCI induced spinal neuron apoptosis.
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Affiliation(s)
- Liao Qi
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Ming Jiang-Hua
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Hu Ge-Liang
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Chen Qing
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Li Ya-Ming
- Department of Orthopedics, Renmin Hospital of Wuhan University, Wuhan 430060, China
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An Y, Li J, Yuan Q, Fan M. MicroRNA-466c-3p exerts protective effect on neuronal apoptosis and improves functional recovery post spinal cord injury via mitochondrial apoptotic pathway. AMB Express 2020; 10:113. [PMID: 32542430 PMCID: PMC7295889 DOI: 10.1186/s13568-020-01033-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Accepted: 05/23/2020] [Indexed: 12/11/2022] Open
Abstract
Spinal cord injury (SCI) is involved with abnormal expression of miRNAs (miRs) which are responsible for some IIry injury responses which include apoptosis, inflammation and oxidative stress. Mechanisms involving miRs induced apoptosis still needs to be investigated. In the present work we developed a rat model of SCI, followed by microarray analysis for expression of miRs at various time points after SCI. The locomotor activity was assessed by Basso, Beattie and Bresnahan score, lesion volume was analyzed by cresyl violet staining and TUNEL staining for extent of apoptosis at various time points of post SCI. Numbers of miRs were altered after 2 weeks of SCI among which miR-466c-3p was the most significantly down-regulated. Transfection with miR-466c-3p mimics caused overexpression of miR-466c-3p, also improvement in functional recovery, decrease in apoptosis of neuronal cells and lesion size was observed in SCI rats. The Luciferase assay suggested that miR-466c-3p suppressed the expression of Bcl-2 (apoptosis regulator). It was also evidenced that upon restoring the levels of Bcl-2 with the help of pc-DNA3-Bcl-2 halted the attenuating action of miR-466c-3p in hydrogen peroxide exposed N9 microglia cells. The findings suggested that miR-466c-3p may inhibit mitochondrial apoptotic pathway via blocking Bcl-2 and cleaved capase-9/-3in rats after SCI. Altogether, the results suggested that miR-466c-3p may exert attenuating effect on functional recovery and inhibit the apoptosis of neuronal cells via halting the mitochondrial apoptosis cascade in SCI rats indicating that miR-466c-3p can be attractive therapeutic candidate in treating SCI.
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Zheng J, Kuang J, Zhang X, Luo D, Liao W. miR-142-3p suppresses apoptosis in spinal cord-injured rats. Transl Neurosci 2020; 11:105-115. [PMID: 33335754 PMCID: PMC7712094 DOI: 10.1515/tnsci-2020-0105] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 03/27/2020] [Accepted: 03/30/2020] [Indexed: 12/24/2022] Open
Abstract
Introduction Spinal cord injury (SCI) leads to abnormal expression of miRs, leading to secondary responses such as oxidative stress, inflammation and apoptosis. In the present work, we screened the miRs involved and the associated pathway. Methods In a rat model of SCI, the microarray analysis for expression of miRs at various time points post-SCI was done. The locomotor analysis was done by Basso, Beattie and Bresnahan score, and Cresyl violet staining was done for lesion volume and TUNEL assay was done for apoptosis in neuronal cells. The expression of apoptotic proteins was done by the western blot study. Results It was evidenced that the expression of the number of miRs was altered on the 14th day post-SCI, and miR-142-3p was found to be the most significantly suppressed miR. The results suggested that overexpression of miR-142-3p by its agomir-attenuated functional recovery decreased lesion size and apoptosis of neuronal cells in rats subjected to SCI. The luciferase assay indicated that miR-142-3p blocked the levels of Bax, which is a significant activator of the mitochondrial apoptotic pathway (MAP) via targeting the 3'UTR region of BV-2 cells, and in addition, pc-DNA-Bax restored Bax and inhibited the correcting role of miR-142-3p in hydrogen peroxide-treated BV-2 cells. The findings suggested that miR-142-3p may inhibit the MAP by inhibiting the expression of cleaved-caspase-3/-9 and Bax in SCI rats. Conclusion This study concludes that miR-142-3p may attenuate the functional recovery and decrease apoptosis in neuronal cells via inhibiting the MAP in the spinal cord-injured rats, confirming miR-142-3p as a potential therapeutic target in treating SCI.
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Affiliation(s)
- Jun Zheng
- Department of Neurorehabilitation, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, 430071, China
| | - Jing Kuang
- Department of Plastic Surgery, Jinan Central Hospital Affiliated to Shandong University, Jinan, Shandong, 250013, China
| | - Xianyu Zhang
- Orthopedics Department, ShangRao People’s Hospital, Shangrao, Jiangxi, 334000, China
| | - Daya Luo
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Nanchang University, Nanchang, Jiangxi, 330006, China
| | - Weijing Liao
- Department of Neurorehabilitation, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, 430071, China
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Shi X, Kaller M, Rokavec M, Kirchner T, Horst D, Hermeking H. Characterization of a p53/miR-34a/CSF1R/STAT3 Feedback Loop in Colorectal Cancer. Cell Mol Gastroenterol Hepatol 2020; 10:391-418. [PMID: 32304779 PMCID: PMC7423584 DOI: 10.1016/j.jcmgh.2020.04.002] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 04/02/2020] [Accepted: 04/03/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND & AIMS The miR-34a gene is a direct target of p53 and is commonly silenced in colorectal cancer (CRC). Here we identified the receptor tyrosine kinase CSF1R as a direct miR-34a target and characterized CSF1R as an effector of p53/miR-34a-mediated CRC suppression. METHODS Analyses of TCGA-COAD and three other CRC cohorts for association of mRNA expression and signatures with patient survival and molecular subtypes. Bioinformatics identification and experimental validation of miRNA and transcription factor targets. Functional analysis of factors/pathways in the regulation of epithelial-mesenchymal transition (EMT), invasion, migration, acquired chemo-resistance and metastasis. Analyses of protein expression and CpG methylation within primary human colon cancer samples. RESULTS In primary CRCs increased CSF1R, CSF1 and IL34 expression was associated with poor patient survival and a mesenchymal-like subtype. CSF1R displayed an inverse correlation with miR-34a expression. This was explained by direct inhibition of CSF1R by miR-34a. Furthermore, p53 repressed CSF1R via inducing miR-34a, whereas SNAIL induced CSF1R both directly and indirectly via repressing miR-34a in a coherent feed-forward loop. Activation of CSF1R induced EMT, migration, invasion and metastasis of CRC cells via STAT3-mediated down-regulation of miR-34a. 5-FU resistance of CRC cells was mediated by CpG-methylation of miR-34a and the resulting elevated expression of CSF1R. In primary CRCs elevated expression of CSF1R was detected at the tumor invasion front and was associated with CpG methylation of the miR-34a promoter as well as distant metastasis. CONCLUSIONS The reciprocal inhibition between miR-34a and CSF1R and its loss in tumor cells may be relevant for therapeutic and prognostic approaches towards CRC management.
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Affiliation(s)
- Xiaolong Shi
- Experimental and Molecular Pathology, Institute of Pathology, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Markus Kaller
- Experimental and Molecular Pathology, Institute of Pathology, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Matjaz Rokavec
- Experimental and Molecular Pathology, Institute of Pathology, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Thomas Kirchner
- Institute of Pathology, Ludwig-Maximilians-University Munich, Munich, Germany,German Cancer Consortium, Partner site Munich, Munich, Germany,German Cancer Research Center, Heidelberg, Germany
| | - David Horst
- Institute of Pathology, Ludwig-Maximilians-University Munich, Munich, Germany,German Cancer Research Center, Heidelberg, Germany,Institute of Pathology, Charité-Universitätsmedizin Berlin, Berlin, Germany,German Cancer Consortium, Partner site Berlin, Berlin, Germany
| | - Heiko Hermeking
- Experimental and Molecular Pathology, Institute of Pathology, Ludwig-Maximilians-University Munich, Munich, Germany,German Cancer Consortium, Partner site Munich, Munich, Germany,German Cancer Research Center, Heidelberg, Germany,Correspondence Address requests for reprints to: Heiko Hermeking, Experimental and Molecular Pathology, Institute of Pathology, Ludwig-Maximilians-Universität München, Thalkirchner Strasse 36, D-80337 Munich, Germany; fax: +49-89-2180-73697.
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Niu S, Ni Y, Niu T, Gao J. Knockdown PEG10 deteriorates H2O2-injury of PC-12 cells by targeting miR-34a-5p/TLX. Mol Immunol 2020; 118:1-8. [DOI: 10.1016/j.molimm.2019.11.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 08/16/2019] [Accepted: 11/27/2019] [Indexed: 12/25/2022]
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Gao F, Shen J, Zhao L, Hao Q, Yang Y. Curcumin Alleviates Lipopolysaccharide (LPS)-Activated Neuroinflammation via Modulation of miR-199b-5p/IκB Kinase β (IKKβ)/Nuclear Factor Kappa B (NF-κB) Pathway in Microglia. Med Sci Monit 2019; 25:9801-9810. [PMID: 31862869 PMCID: PMC6937907 DOI: 10.12659/msm.918237] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 09/04/2019] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Microglia reside in the spinal cord plays a key role in the onset, progression of post-spinal cord injury (SCI) neuroinflammation. Curcumin has been shown to exhibit diverse anti-inflammatory and anti-tumor activities. The aim of this study was to explore the effect of curcumin on the inflammatory response in lipopolysaccharide (LPS)-activated microglia and its mechanism. MATERIAL AND METHODS The expression levels of phosphorylated-p65 (p-p65), tumor necrosis factor (TNF)-alpha, interleukin (IL)-1ß, and IkappaB kinase ß (IKKß) were examined by western blot assay. MiR-199b-5p expression was detected by quantitative real-time polymerase chain reaction assay. The putative binding sites of miR-199b-5p in IKKß 3'UTR were predicted by bioinformatics, and direct interaction between miR-199b-5p and IKKß was verified by dual-luciferase reporter assay and RNA-immunoprecipitation assay. RESULTS Curcumin significantly suppressed inflammatory response induced by LPS by inactivation of nuclear factor kappa B (NF-kappaB) in microglial cells, as reflected by the decreased levels of p-p65, as well as the pro-inflammatory mediators, including inducible nitric oxide synthase (iNOS), TNF-alpha, and IL-1ß. Moreover, curcumin increased the level of miR-199b-5p and decreased IKKß expression in activated microglial cells. Knockdown of miR-199b-5p or overexpression of IKKß reversed the inhibitory effect of curcumin on inflammatory response and NF-kappaB activation. MiR-199b-5p directly targeted IKKß and suppressed its expression. Silencing of IKKß abolished miR-199b-5p-stimulated inflammatory cytokines production and NF-kappaB activation. CONCLUSIONS Curcumin attenuated neuroinflammation induced by LPS through regulating miR-199b-5p/IKKß/NF-kappaB axis in microglia.
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Affiliation(s)
- Feng Gao
- Department of Physiology, School of Medicine of Yan’an University, Yan’an, Shaanxi, P.R. China
| | - Juan Shen
- Department of Videography, School of Medicine of Yan’an University, Yan’an, Shaanxi, P.R. China
| | - Lin Zhao
- Department of Anatomy, School of Medicine of Yan’an University, Yan’an, Shaanxi, P.R. China
| | - Qin Hao
- Department of Central Laboratory, School of Medicine of Yan’an University, Yan’an, Shaanxi, P.R. China
| | - Yanling Yang
- Department of Physiology, School of Medicine of Yan’an University, Yan’an, Shaanxi, P.R. China
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Brandenburger T, Johannsen L, Prassek V, Kuebart A, Raile J, Wohlfromm S, Köhrer K, Huhn R, Hollmann MW, Hermanns H. MiR-34a is differentially expressed in dorsal root ganglia in a rat model of chronic neuropathic pain. Neurosci Lett 2019; 708:134365. [DOI: 10.1016/j.neulet.2019.134365] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 06/24/2019] [Accepted: 07/02/2019] [Indexed: 11/25/2022]
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Xu Z, Zhang K, Wang Q, Zheng Y. MicroRNA‑124 improves functional recovery and suppresses Bax‑dependent apoptosis in rats following spinal cord injury. Mol Med Rep 2019; 19:2551-2560. [PMID: 30720072 PMCID: PMC6423616 DOI: 10.3892/mmr.2019.9904] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 01/14/2019] [Indexed: 12/15/2022] Open
Abstract
Spinal cord injury (SCI) induces aberrant expression of microRNAs (miRNAs), causing various secondary injury responses, including inflammation, apoptosis and oxidative stress. However, the mechanisms underlying miRNA-mediated apoptosis have not been fully elucidated. In the present study, a rat SCI model was established and a miRNA microarray was analyzed to detect miRNA expression profiles at different times post-SCI. The Basso, Beattie and Bresnahan score, cresyl violet staining and terminal deoxynucleotidyl-transferase-mediated dUTP nick end labeling staining were used to evaluate locomotor activity, lesion volume and neuronal cell apoptosis, respectively, at different time points post-SCI. It was observed that numerous miRNAs were altered at 14 days post-SCI and miR-124 was one of the most notably downregulated miRNAs. The present results demonstrated that overexpression of miR-124 by agomir-124 improves functional recovery, decreases lesion size and suppresses neuronal cell apoptosis in a rat SCI model. Luciferase reporter assay demonstrated that miR-124 inhibited apoptosis regulator BAX (Bax) expression, a key molecule in the activation of the mitochondrial apoptotic pathway, by targeting its 3′-untranslated region in BV-2 cells. Furthermore, restoration of Bax by pc-DNA-Bax inhibits the protective effect of miR-124 in H2O2-treated BV-2 cells. Notably, the present results demonstrated that miR-124 may block the mitochondrial apoptotic pathway by inhibiting Bax, cleaved-caspase-9 and cleaved-caspase-3 expression in rats following SCI. Collectively, the present results suggested that miR-124 may improve functional recovery and supress neuronal cell apoptosis by blocking the mitochondrial apoptotic pathway in SCI rats, suggesting that miR-124 may serve as a potential therapeutic target in SCI treatment.
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Affiliation(s)
- Zhongyang Xu
- Department of Orthopedics, Jining No. 1 People's Hospital, Jining, Shandong 272011, P.R. China
| | - Kefeng Zhang
- Department of Orthopedics, Jining No. 1 People's Hospital, Jining, Shandong 272011, P.R. China
| | - Qian Wang
- Department of Orthopedics, Jining No. 1 People's Hospital, Jining, Shandong 272011, P.R. China
| | - Yanping Zheng
- Department of Orthopedics, Qilu Hospital Affiliated to Shandong University, Jinan, Shandong 250012, P.R. China
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Zhang H, Li D, Zhang Y, Li J, Ma S, Zhang J, Xiong Y, Wang W, Li N, Xia L. Knockdown of lncRNA BDNF-AS suppresses neuronal cell apoptosis via downregulating miR-130b-5p target gene PRDM5 in acute spinal cord injury. RNA Biol 2018; 15:1071-1080. [PMID: 29995562 DOI: 10.1080/15476286.2018.1493333] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
OBJECTIVE The present study was designed to investigate the molecular mechanism and biological roles of lncRNA brain-derived neurotrophic factor antisense (lncRNA BDNF-AS) in acute spinal cord injury (ASCI). METHODS The rat model of ASCI and hypoxic cellular model were established to detect the expression of BDNF-AS, miR-130b-5p, PR (PRDI-BF1 and RIZ) domain protein 5 (PRDM5) and cleaved caspase 3 (c-caspase 3) using qRT-PCR and western blot. Basso, Beattie and Bresnahan (BBB) score was carried out to assess neurological function. Flow cytometry was used to determine the apoptosis of neuronal cells. The association among BDNF-AS, miR-130b-5p and PRDM5 were disclosed by RNA immunoprecipitation (RIP) assay, RNA pull-down assay and dual-luciferase reporter assay. RESULTS BDNF-AS, PRDM5 and c-caspase 3 expression were significantly upregulated, while miR-130b-5p was suppressed in the ASCI group and neuronal cells following hypoxia treatment. BDNF-AS knockdown inhibited neuronal cell apoptosis. Further studies indicated that BDNF-AS functioned as a competing endogenous RNA (ceRNA) by sponging miR-130b-5p in neuronal cells. Further investigations demonstrated that PRDM5 was a target of miR-130b-5p and BDNF-AS knockdown exerted anti-apoptotic effects via miR-130b-5p/PRDM5 axis. CONCLUSION The lncRNA BDNF-AS/miR-130b-5p/PRDM5 axis might be a promising therapeutic target for ASCI.
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Affiliation(s)
- Huafeng Zhang
- a Department of Orthopedics , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan Province , China
| | - Dongzhe Li
- a Department of Orthopedics , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan Province , China
| | - Yi Zhang
- a Department of Orthopedics , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan Province , China
| | - Jianqiang Li
- a Department of Orthopedics , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan Province , China
| | - Shengli Ma
- a Department of Orthopedics , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan Province , China
| | - Jianwei Zhang
- b Department of Urology , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan Province , China
| | - Yuanyuan Xiong
- c Department of Hematology , The Affiliated Cancer Hospital of Zhengzhou University and Henan Cancer Hospital , Zhengzhou , Henan Province , China
| | - Wengang Wang
- a Department of Orthopedics , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan Province , China
| | - Ning Li
- a Department of Orthopedics , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan Province , China
| | - Lei Xia
- a Department of Orthopedics , The First Affiliated Hospital of Zhengzhou University , Zhengzhou , Henan Province , China
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14
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Xie W, Lu Q, Wang K, Lu J, Gu X, Zhu D, Liu F, Guo Z. miR-34b-5p inhibition attenuates lung inflammation and apoptosis in an LPS-induced acute lung injury mouse model by targeting progranulin. J Cell Physiol 2018; 233:6615-6631. [PMID: 29150939 PMCID: PMC6001482 DOI: 10.1002/jcp.26274] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Accepted: 11/14/2017] [Indexed: 12/14/2022]
Abstract
Inflammation and apoptosis play important roles in the initiation and progression of acute lung injury (ALI). Our previous study has shown that progranulin (PGRN) exerts lung protective effects during LPS-induced ALI. Here, we have investigated the potential roles of PGRN-targeting microRNAs (miRNAs) in regulating inflammation and apoptosis in ALI and have highlighted the important role of PGRN. LPS-induced lung injury and the protective roles of PGRN in ALI were first confirmed. The function of miR-34b-5p in ALI was determined by transfection of a miR-34b-5p mimic or inhibitor in intro and in vivo. The PGRN level gradually increased and subsequently significantly decreased, reaching its lowest value by 24 hr; PGRN was still elevated compared to the control. The change was accompanied by a release of inflammatory mediators and accumulation of inflammatory cells in the lungs. Using bioinformatics analysis and RT-PCR, we demonstrated that, among 12 putative miRNAs, the kinetics of the miR-34b-5p levels were closely associated with PGRN expression in the lung homogenates. The gain- and loss-of-function analysis, dual-luciferase reporter assays, and rescue experiments confirmed that PGRN was the functional target of miR-34b-5p. Intravenous injection of miR-34b-5p antagomir in vivo significantly inhibited miR-34b-5p up-regulation, reduced inflammatory cytokine release, decreased alveolar epithelial cell apoptosis, attenuated lung inflammation, and improved survival by targeting PGRN during ALI. miR-34b-5p knockdown attenuates lung inflammation and apoptosis in an LPS-induced ALI mouse model by targeting PGRN. This study shows that miR-34b-5p and PGRN may be potential targets for ALI treatments.
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Affiliation(s)
- Wang Xie
- Department of Respiratory MedicineShanghai East HospitalTongji University School of MedicinePudongShanghaiChina
| | - Qingchun Lu
- Department of Respiratory MedicineShanghai East HospitalTongji University School of MedicinePudongShanghaiChina
| | - Kailing Wang
- Department of Respiratory MedicineShanghai East HospitalTongji University School of MedicinePudongShanghaiChina
| | - Jingjing Lu
- Department of Respiratory MedicineShanghai East HospitalTongji University School of MedicinePudongShanghaiChina
| | - Xia Gu
- Department of Respiratory MedicineShanghai East HospitalTongji University School of MedicinePudongShanghaiChina
| | - Dongyi Zhu
- Department of Respiratory MedicineShanghai East HospitalTongji University School of MedicinePudongShanghaiChina
| | - Fanglei Liu
- Department of Respiratory MedicineShanghai East HospitalTongji University School of MedicinePudongShanghaiChina
| | - Zhongliang Guo
- Department of Respiratory MedicineShanghai East HospitalTongji University School of MedicinePudongShanghaiChina
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15
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circRNA_0046367 Prevents Hepatoxicity of Lipid Peroxidation: An Inhibitory Role against Hepatic Steatosis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:3960197. [PMID: 29018509 PMCID: PMC5605923 DOI: 10.1155/2017/3960197] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Revised: 06/26/2017] [Accepted: 07/06/2017] [Indexed: 12/20/2022]
Abstract
Hepatic steatosis reflects the miRNA-related pathological disorder with triglyceride accumulation and lipid peroxidation, which leads to nonalcoholic steatohepatitis, liver fibrosis/cirrhosis, and even hepatocellular carcinoma. Circular RNA (circRNA)/miRNA interaction reveals a novel layer of epigenetic regulation, yet the miRNA-targeting circRNA remains uncertain in hepatic steatosis. Here, we uncover circRNA_0046367 to be endogenous modulator of miR-34a that underlies hepatic steatosis. In contrast to its expression loss during the hepatocellular steatosis in vivo and in vitro, circRNA_0046367 normalization abolished miR-34a's inhibitory effect on peroxisome proliferator-activated receptor α (PPARα) via blocking the miRNA/mRNA interaction with miRNA response elements (MREs). PPARα restoration led to the transcriptional activation of genes associated with lipid metabolism, including carnitine palmitoyltransferase 2 (CPT2) and acyl-CoA binding domain containing 3 (ACBD3), and then resulted in the steatosis resolution. Hepatotoxicity of steatosis-related lipid peroxidation, being characterized by mitochondrial dysfunction, growth arrest, and apoptosis, is resultantly prevented after the circRNA_0046367 administration. These findings indicate a circRNA_0046367/miR-34a/PPARα regulatory system underlying hepatic steatosis. Normalized expression of circRNA_0046367 may ameliorate the lipoxidative stress on the basis of steatosis attenuation. circRNA_0046367, therefore, is suggested to be potential approach to the therapy of lipid peroxidative damage.
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