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Yang X, Yu D, Gao F, Yang J, Chen Z, Liu J, Yang X, Li L, Zhang Y, Yan C. Integrative Analysis of Morphine-Induced Differential Circular RNAs and ceRNA Networks in the Medial Prefrontal Cortex. Mol Neurobiol 2024; 61:4602-4618. [PMID: 38109006 DOI: 10.1007/s12035-023-03859-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 12/04/2023] [Indexed: 12/19/2023]
Abstract
Circular RNAs (circRNAs) are a novel type of non-coding RNAs. Despite the fact that the functional mechanisms of most circRNAs remain unknown, emerging evidence indicates that circRNAs could sponge microRNAs (miRNAs), bind to RNA binding proteins (RBP), and even be translated into protein. Recent research has demonstrated the crucial roles played by circRNAs in neuropsychiatric disorders. The medial prefrontal cortex (mPFC) is a crucial component of drug reward circuitry and exerts top-down control over cognitive functions. However, there is currently limited knowledge about the correlation between circRNAs and morphine-associated contextual memory in the mPFC. Here, we performed morphine-induced conditioned place preference (CPP) in mice and extracted mPFC tissue for RNA-sequencing. Our study represented the first attempt to identify differentially expressed circRNAs (DEcircRNAs) and mRNAs (DEmRNAs) in the mPFC after morphine-induced CPP. We identified 47 significantly up-regulated DEcircRNAs and 429 significantly up-regulated DEmRNAs, along with 74 significantly down-regulated DEcircRNAs and 391 significantly down-regulated DEmRNAs. Functional analysis revealed that both DEcircRNAs and DEmRNAs were closely associated with neuroplasticity. To further validate the DEcircRNAs, we conducted qRT-PCR, Sanger sequencing, and RNase R digestion assays. Additionally, using an integrated bioinformatics approach, we constructed ceRNA networks and identified critical circRNA/miRNA/mRNA axes that contributed to the development of morphine-associated contextual memory. In summary, our study provided novel insights into the role of circRNAs in drug-related memory, specifically from the perspective of ceRNAs.
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Affiliation(s)
- Xixi Yang
- College of Forensic Medicine, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
- Key Laboratory of Forensic Medicine, National Health Commission, Xi'an 710061, Shaanxi, China
- Bio-Evidence Sciences Academy, Western China Science and Technology Innovation Harbor, Xi'an Jiaotong University, Xi'an 710100, Shaanxi, China
| | - Dongyu Yu
- College of Forensic Medicine, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
- Key Laboratory of Forensic Medicine, National Health Commission, Xi'an 710061, Shaanxi, China
- Bio-Evidence Sciences Academy, Western China Science and Technology Innovation Harbor, Xi'an Jiaotong University, Xi'an 710100, Shaanxi, China
| | - Feifei Gao
- College of Forensic Medicine, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
- Key Laboratory of Forensic Medicine, National Health Commission, Xi'an 710061, Shaanxi, China
- Bio-Evidence Sciences Academy, Western China Science and Technology Innovation Harbor, Xi'an Jiaotong University, Xi'an 710100, Shaanxi, China
| | - Jingsi Yang
- College of Forensic Medicine, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
- Key Laboratory of Forensic Medicine, National Health Commission, Xi'an 710061, Shaanxi, China
- Bio-Evidence Sciences Academy, Western China Science and Technology Innovation Harbor, Xi'an Jiaotong University, Xi'an 710100, Shaanxi, China
| | - Zhennan Chen
- College of Forensic Medicine, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
- Key Laboratory of Forensic Medicine, National Health Commission, Xi'an 710061, Shaanxi, China
- Bio-Evidence Sciences Academy, Western China Science and Technology Innovation Harbor, Xi'an Jiaotong University, Xi'an 710100, Shaanxi, China
| | - Junlin Liu
- College of Forensic Medicine, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
- Key Laboratory of Forensic Medicine, National Health Commission, Xi'an 710061, Shaanxi, China
- Bio-Evidence Sciences Academy, Western China Science and Technology Innovation Harbor, Xi'an Jiaotong University, Xi'an 710100, Shaanxi, China
| | - Xiaoyu Yang
- College of Forensic Medicine, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
- Key Laboratory of Forensic Medicine, National Health Commission, Xi'an 710061, Shaanxi, China
- Bio-Evidence Sciences Academy, Western China Science and Technology Innovation Harbor, Xi'an Jiaotong University, Xi'an 710100, Shaanxi, China
| | - Lanjiang Li
- College of Forensic Medicine, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
- Key Laboratory of Forensic Medicine, National Health Commission, Xi'an 710061, Shaanxi, China
- Bio-Evidence Sciences Academy, Western China Science and Technology Innovation Harbor, Xi'an Jiaotong University, Xi'an 710100, Shaanxi, China
| | - Yuxiang Zhang
- College of Forensic Medicine, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China.
- Key Laboratory of Forensic Medicine, National Health Commission, Xi'an 710061, Shaanxi, China.
- Bio-Evidence Sciences Academy, Western China Science and Technology Innovation Harbor, Xi'an Jiaotong University, Xi'an 710100, Shaanxi, China.
| | - Chunxia Yan
- College of Forensic Medicine, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China.
- Key Laboratory of Forensic Medicine, National Health Commission, Xi'an 710061, Shaanxi, China.
- Bio-Evidence Sciences Academy, Western China Science and Technology Innovation Harbor, Xi'an Jiaotong University, Xi'an 710100, Shaanxi, China.
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Liu Y, Li J, Xiong Y, Tan C, Li C, Cao Y, Xie W, Deng Z. Long-term exposure to PM 2.5 leads to mitochondrial damage and differential expression of associated circRNA in rat hepatocytes. Sci Rep 2024; 14:11870. [PMID: 38789588 PMCID: PMC11126672 DOI: 10.1038/s41598-024-62748-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 05/21/2024] [Indexed: 05/26/2024] Open
Abstract
Fine particulate matter (PM2.5) is one of the four major causes of mortality globally. The objective of this study was to investigate the mechanism underlying liver injury following exposure to PM2.5 and the involvement of circRNA in its regulation. A PM2.5 respiratory tract exposure model was established in SPF SD male rats with a dose of 20 mg/kg, and liver tissue of rats in control group and PM2.5-exposed groups rats were detected. The results of ICP-MS showed that Mn, Cu and Ni were enriched in the liver. HE staining showed significant pathological changes in liver tissues of PM2.5-exposed group, transmission electron microscopy showed significant changes in mitochondrial structure of liver cells, and further mitochondrial function detection showed that the PM2.5 exposure resulted in an increase in cell reactive oxygen species content and a decrease in mitochondrial transmembrane potential, while the expression of SOD1 and HO-1 antioxidant oxidase genes was upregulated. Through high-throughput sequencing of circRNAs, we observed a significant down-regulation of 10 and an up-regulation of 17 circRNAs in the PM2.5-exposed groups. The functional enrichment and pathway analyses indicated that the differentially expressed circRNAs by PM2.5 exposure were primarily associated with processes related to protein ubiquitination, zinc ion binding, peroxisome function, and mitochondrial regulation. These findings suggest that the mechanism underlying liver injury induced by PM2.5-exposure may be associated with mitochondrial impairment resulting from the presence of heavy metal constituents. Therefore, this study provides a novel theoretical foundation for investigating the molecular mechanisms underlying liver injury induced by PM2.5 exposure.
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Affiliation(s)
- Ying Liu
- Department of Medical Laboratory, Hunan Provincial People's Hospital, the First Affiliated Hospital of Hunan Normal University, Changsha, 410005, People's Republic of China
| | - Jing Li
- Department of Medical Laboratory, Hunan Provincial People's Hospital, the First Affiliated Hospital of Hunan Normal University, Changsha, 410005, People's Republic of China
| | - Yican Xiong
- Department of Ophthalmology and Stomatology, Hunan Provincial People's Hospital, the First Affiliated Hospital of Hunan Normal University, Changsha, 410005, People's Republic of China
| | - Chaochao Tan
- Department of Medical Laboratory, Hunan Provincial People's Hospital, the First Affiliated Hospital of Hunan Normal University, Changsha, 410005, People's Republic of China
| | - Cunyan Li
- Department of Medical Laboratory, Hunan Provincial People's Hospital, the First Affiliated Hospital of Hunan Normal University, Changsha, 410005, People's Republic of China
| | - Youde Cao
- Department of Medical Laboratory, Hunan Provincial People's Hospital, the First Affiliated Hospital of Hunan Normal University, Changsha, 410005, People's Republic of China
| | - Wanying Xie
- Department of Medical Laboratory, Hunan Provincial People's Hospital, the First Affiliated Hospital of Hunan Normal University, Changsha, 410005, People's Republic of China
| | - Zhonghua Deng
- Department of Medical Laboratory, Hunan Provincial People's Hospital, the First Affiliated Hospital of Hunan Normal University, Changsha, 410005, People's Republic of China.
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Weng YH, Yu WT, Luo YP, Liu C, Gu XX, Chen HY, Liu HB. Association between miR-365 polymorphism and ischemic stroke in a Chinese population. Front Neurol 2023; 14:1260230. [PMID: 37840919 PMCID: PMC10569467 DOI: 10.3389/fneur.2023.1260230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 08/30/2023] [Indexed: 10/17/2023] Open
Abstract
Background Ischemic stroke (IS) represents a major cause of morbidity and mortality across the globe. The aberrant expression of miR-365 has been found to be implicated in a wide array of human diseases, including atherosclerosis and cancer. Studies on single-nucleotide polymorphisms (SNPs) in miRNA genes can help gain insight into the susceptibility to the condition. This study aimed to examine the relationship between miR-365 SNPs and the risk of IS. Methods The study recruited 215 IS patients and 220 controls. The SNPscans genotyping was employed to genotype three polymorphic loci (rs121224, rs30230, and rs178553) of miR-365. The relative expression of miR-365 in peripheral blood mononuclear cells of the patients and controls was determined by using real-time quantitative PCR. Results The miR-365 rs30230 polymorphism exhibited a significant association with the risk of developing IS (TC vs. CC: adjusted OR = 0.55, 95% CI: 0.33-0.92, P = 0.022; TT vs. CC: adjusted OR = 0.34, 95% CI: 0.14-0.85, P = 0.021; TC +TT vs. CC: adjusted OR = 0.51, 95% CI: 0.31-0.83, P = 0.007; T vs. C: adjusted OR = 0.57, 95% CI: 0.39-0.83, P = 0.004). Haplotype analysis revealed that the C-T-G haplotype was associated with a decreased risk of IS (OR = 0.68, 95% CI: 0.46-1.00, P = 0.047). Furthermore, miR-365 expression was significantly higher in IS patients than in controls (P < 0.001). Interestingly, patients with rs30230 TC or TT genotypes had lower miR-365 levels compared to their counterparts with CC genotypes (P < 0.001). Conclusions The miR-365 rs30230 polymorphism might bear an association with IS susceptibility in the Chinese population, and the rs30230 TC/TT genotype might be a protective factor against IS.
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Affiliation(s)
- Yin-Hua Weng
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guilin Medical University, Guilin, China
- College of Medical Laboratory Science, Guilin Medical University, Guilin, China
- School of Clinical Medicine, Guilin Medical University, Guilin, China
| | - Wen-Tao Yu
- School of Clinical Medicine, Guilin Medical University, Guilin, China
| | - Yan-Ping Luo
- School of Clinical Medicine, Guilin Medical University, Guilin, China
| | - Chao Liu
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guilin Medical University, Guilin, China
- College of Medical Laboratory Science, Guilin Medical University, Guilin, China
- School of Clinical Medicine, Guilin Medical University, Guilin, China
| | - Xi-Xi Gu
- School of Clinical Medicine, Guilin Medical University, Guilin, China
| | - Huo-Ying Chen
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guilin Medical University, Guilin, China
- College of Medical Laboratory Science, Guilin Medical University, Guilin, China
- Guangxi Health Commission Key Laboratory of Glucose and Lipid Metabolism Disorders, Guangxi Key Laboratory of Metabolic Reprogramming and Intelligent Medical Engineering for Chronic Diseases, The Second Affiliated Hospital of Guilin Medical University, Guilin, China
| | - Hong-Bo Liu
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guilin Medical University, Guilin, China
- College of Medical Laboratory Science, Guilin Medical University, Guilin, China
- Guangxi Health Commission Key Laboratory of Glucose and Lipid Metabolism Disorders, Guangxi Key Laboratory of Metabolic Reprogramming and Intelligent Medical Engineering for Chronic Diseases, The Second Affiliated Hospital of Guilin Medical University, Guilin, China
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Zhang X, Yi Y, Cheng L, Chen H, Hu Y. Dynamic effects of miR-20a-5p on hippocampal ripple energy after status epilepticus in rats. Exp Brain Res 2023; 241:2097-2106. [PMID: 37464223 DOI: 10.1007/s00221-023-06663-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 07/05/2023] [Indexed: 07/20/2023]
Abstract
To determine the dynamic effects of miR-20a-5p on hippocampal ripple energy in rats after status epilepticus (SE). A lithium pilocarpine (LiCl-PILO)-induced rat model of status epilepticus (SE) was established, and the rats were divided into the normal control (Control, CTL), epileptic control (PILO), valproic acid (VPA + PILO), miR-20a-5p overexpression lentivirus vector (miR + PILO), sponges blocking lentivirus vector (Sponges + PILO), and scramble sequence negative control (Scramble + PILO) groups (n = 6). Electroencephalograms (EEGs) were used to analyze changes in hippocampal ripple energy before and after SE. Quantitative polymerase chain reaction (q-PCR) analysis showed that miR-20a-5p levels gradually increased after miR-20a-5p overexpression lentivirus vector injection into the lateral ventricle, and the miR-20a-5p levels were significantly higher than that in CTL group on days 7 and 36 (P < 0.001). The miR-20a-5p levels decreased significantly on days 7 and 36 after blocking by sponges lentivirus vector injected into the lateral ventricle (P < 0.001). After injection of PILO, the average ripple energy expression in each group gradually increased, and reached the peak before chloral hydrate injection (compared with 1 day before SE, P < 0.05). The ripple energy in the VPA + PILO and Sponges + PILO groups was significantly lower than that in the PILO group at 60 min and 70 min after PILO injection and before chloral hydrate injection (P < 0.05), and maintained lower until 2 h after chloral hydrate injection in VPA + PILO (P < 0.05). Compared with the VPA + PILO group, the mean ripple energy of the Sponges + PILO group had no difference at all time points (P ≥ 0.05). After SE, ripple distribution of space and energy is closely related to the occurrence of epilepsy. Inhibition of miR20a-5p expression can downregulate ripple oscillation energy during seizure.
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Affiliation(s)
- Xinyu Zhang
- Department of Neurology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Children's Hospital of Chongqing Medical University, No.136 Zhongshan 2nd Road, Yu Zhong District, Chongqing, 400014, China
- Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Yanjun Yi
- Department of Neurology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Children's Hospital of Chongqing Medical University, No.136 Zhongshan 2nd Road, Yu Zhong District, Chongqing, 400014, China
- Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Li Cheng
- Department of Neurology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Children's Hospital of Chongqing Medical University, No.136 Zhongshan 2nd Road, Yu Zhong District, Chongqing, 400014, China
- Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Hengsheng Chen
- Department of Neurology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Children's Hospital of Chongqing Medical University, No.136 Zhongshan 2nd Road, Yu Zhong District, Chongqing, 400014, China
- Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, China
| | - Yue Hu
- Department of Neurology, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Children's Hospital of Chongqing Medical University, No.136 Zhongshan 2nd Road, Yu Zhong District, Chongqing, 400014, China.
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Deng M, Zou W. Noncoding RNAs: Novel Targets for Opioid Tolerance. Curr Neuropharmacol 2023; 21:1202-1213. [PMID: 36453497 PMCID: PMC10286586 DOI: 10.2174/1570159x21666221129122932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 10/12/2022] [Accepted: 11/11/2022] [Indexed: 12/03/2022] Open
Abstract
As a global health problem, chronic pain is one of the leading causes of disability, and it imposes a huge economic and public health burden on families and society. Opioids represent the cornerstone of analgesic drugs. However, opioid tolerance caused by long-term application of opioids is a major factor leading to drug withdrawal, serious side effects caused by dose increases, and even the death of patients, placing an increasing burden on individuals, medicine, and society. Despite efforts to develop methods to prevent and treat opioid tolerance, no effective treatment has yet been found. Therefore, understanding the mechanism underlying opioid tolerance is crucial for finding new prevention and treatment strategies. Noncoding RNAs (ncRNAs) are important parts of mammalian gene transcriptomes, and there are thousands of unique noncoding RNA sequences in cells. With the rapid development of high-throughput genome technology, research on ncRNAs has become a hot topic in biomedical research. In recent years, studies have shown that ncRNAs mediate physiological and pathological processes, including chromatin remodeling, transcription, posttranscriptional modification and signal transduction, which are key regulators of physiological processes in developmental and disease environments and have become biomarkers and potential therapeutic targets for various diseases. An increasing number of studies have found that ncRNAs are closely related to the development of opioid tolerance. In this review, we have summarized the evidence that ncRNAs play an important role in opioid tolerance and that ncRNAs may be novel targets for opioid tolerance.
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Affiliation(s)
- Meiling Deng
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
- Department of Anesthesiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Wangyuan Zou
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
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MiR-20a-5p Regulates MPP +-Induced Oxidative Stress and Neuroinflammation in HT22 Cells by Targeting IRF9/NF- κB Axis. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:6621206. [PMID: 34249133 PMCID: PMC8238586 DOI: 10.1155/2021/6621206] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Accepted: 06/04/2021] [Indexed: 01/01/2023]
Abstract
Substantial evidence indicates that microRNAs (miRNAs) can be used as biological markers of Parkinson's disease (PD) and contribute to the risk assessment, early diagnosis, and treatment. We aimed to explore the role and potential mechanism of miR-20a-5p on inflammation and oxidative stress in 1-methyl-4-phenyl pyridine ion- (MPP+-) induced HT22 cells. HT22 cells were pretreated with miR-20a-5p mimic and/or pcDNA-IRF9 for 24 h and then treated with MPP+ (0.5 mM) for 24 h. The cell viability and apoptosis were determined using the Cell Counting Kit-8 (CCK-8) and Annexin V FITC/PI staining flow cytometry assay, respectively. The expression and secretion of inflammatory factors and oxidative stress-related factors were detected by enzyme-linked immunosorbent assay (ELISA). The protein expression levels were detected using Western blot analysis. Here, we discovered that MPP+ led to mitochondrial dysfunction, inflammation, and cell damage of HT22 cells, which were alleviated by miR-20a-5p overexpression. We further clarified that interferon regulatory factor 9 (IRF9) was a target gene of miR-20a-5p. IRF9 contributed to MPP+-induced mitochondrial disruption, inflammation, and cell apoptosis. Moreover, IRF9 hindered the improvement of miR-20a-5p overexpression on MPP+-induced neurotoxicity. Furthermore, the decrease of p-P65 level induced by miR-20a-5p mimic was significantly reversed by IRF9 overexpression. These findings demonstrate that miR-20a-5p contributes to MPP+-induced mitochondrial disruption and cell damage, and miR-20a-5p might be a novel therapeutic target for PD.
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Du L, Jiang Y, Sun Y. Astrocyte-derived exosomes carry microRNA-17-5p to protect neonatal rats from hypoxic-ischemic brain damage via inhibiting BNIP-2 expression. Neurotoxicology 2021; 83:28-39. [PMID: 33309839 DOI: 10.1016/j.neuro.2020.12.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 12/03/2020] [Accepted: 12/04/2020] [Indexed: 12/14/2022]
Abstract
Exosomes play critical roles in neurogenesis. This study aims to explore the mechanism of astrocyte-derived exosomes in neonatal rats with hypoxic-ischemic brain damage (HIBD). Astrocytes were collected and astrocyte-derived exosomes were isolated and identified. Neonatal rats were pre-treated with exosomes and then subjected to HIBD induction. Then the neurobehaviors, neuronal apoptosis, inflammation and oxidative stress in rat brain were measured. Differentially expressed microRNAs (miRNAs) in rat brain before and after HI procedure were analyzed. H19-7 cells were subjected to oxygen and glucose deprivation (OGD) for in vitro studies. Target relation between miR-17-5p and BNIP2 was identified. Gain- and loss-of functions of miR-17-5p and BNIP2 were conducted to identify their roles in viability, apoptosis, oxidative stress and inflammation of OGD-treated cells. Collectively, astrocyte-derived exosomes improved neurobehaviors, and reduced cerebral infarction, neuronal apoptosis, oxidative and inflammation in vivo and in vitro. The exosomes carried miR-17-5p bound to BNIP2 and negatively regulated BNIP2 expression in OGD-treated cells. Over-expression of miR-17-5p increased viability, and decreased OGD-induced apoptosis, oxidative stress and inflammation of H19-7 cells, which were reversed by over-expression of BNIP2. Taken together, the study suggested that astrocyte-derived exosomes could carry miR-17-5p to protect neonatal rats from HIBD via inhibiting BNIP-2 expression.
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Affiliation(s)
- Lin Du
- Department of Developmental Behavioral Pediatrics, The First Hospital of Jilin University, Changchun, Jilin, 130021, PR China.
| | - Yuying Jiang
- Department of Ophthalmology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, 130000, PR China
| | - Ying Sun
- Department of Abdominal Ultrasonography, The First Hospital of Jilin University, Changchun, Jilin, 130021, PR China.
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Gao Y, Cui M, Zhong S, Feng C, Nwobodo AK, Chen B, Song Y, Wang Y. Dihydroartemisinin ameliorates LPS-induced neuroinflammation by inhibiting the PI3K/AKT pathway. Metab Brain Dis 2020; 35:661-672. [PMID: 32152798 DOI: 10.1007/s11011-020-00533-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 01/17/2020] [Indexed: 11/30/2022]
Abstract
Neuroinflammation can cause multiple neurodegenerative diseases, such as Alzheimer's disease (AD), Parkinson's disease (PD), and Huntington's disease (HD). Recent studies have shown that the artemisinin derivative dihydroartemisinin (DHA) can be used as an immunomodulatory, anti-inflammatory and anti-tumor agent. The anti-neuroinflammatory effects of DHA were evaluated in our study, and the underlying mechanisms were explored using the Morris water maze test (MWMT), Open-field test (OFT) and Closed-field test (CFT), Elevated plus maze test (EPMT), Nissl Staining, Immunofluorescence analysis, RT-PCR, and Western Blot. Our results show that DHA significantly inhibits LPS-induced inflammation and attenuates LPS-induced behavioral and memory disorders. 1. Behavioral test results: 1) in the water maze test, the mice in the LPS group showed increased escape latency and length of the movement path on the third day; they also had a decreased number of crossings of the target quadrant after the platform was removed on the 5th day and remained in the target quadrant for less time; 2) in the open- and closed-field experiment, the number of activities and activities in the open-field were significantly reduced; 3) in the elevated cross maze experiment, LPS-treated mice exhibited a significant reduction in the number of times and the time to enter the open arm; the above behavior was reversed after DHA treatment. 2. Nissl staining results: compared with the Control group, the LPS group showed significant damage, and the number of damaged cells in the hippocampal CA1, CA2, CA3 and DG regions was increased; DHA treatment reduced cell damage. 3. RT-PCR results: compared with the Control group, the LPS group showed increased expression of IL-1β and IL-6 but decreased expression after DHA treatment. 4. GFAP fluorescent staining: compared with the control group, the corresponding reactivity of positive cells in the LPS-induced group was increased in the CA1-CA3 and DG regions of the hippocampus; compared with the LPS-induced mice, cells in the LPS + DHA group showed significantly reduced reactivity (GFAP). 5. Western blot results: compared with the Control group, the LPS group showed increased expression of P-PI3K/PI3K, P-AKT/AKT, IL-6 and TNFα and a decreased expression of P-PI3K/PI3K, IL-6, TNF and P-AKT/AKT after DHA treatment. Our findings provide direct evidence for the potential use of DHA in the treatment of neuroinflammatory diseases.
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Affiliation(s)
- Yuting Gao
- Medical Technology School, Xuzhou Medical University, Xuzhou, 221004, China
| | - Miaomiao Cui
- Department of Genetics, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, Jiangsu, 221004, People's Republic of China
| | - Sijin Zhong
- Department of Clinical, Xuzhou Medical University, Xuzhou, China
| | - Chenyao Feng
- Department of Clinical, Xuzhou Medical University, Xuzhou, China
| | - Alexander Kenechukwu Nwobodo
- Department of Genetics, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, Jiangsu, 221004, People's Republic of China
| | - Bin Chen
- Department of Rehabilitation, The Affiliated People's Hospital of Fujian University of Traditional Chinese Medicine, Fuzhou, 350004, Fujian Province, China
| | - Yuanjian Song
- Department of Genetics, Xuzhou Medical University, 209 Tongshan Road, Xuzhou, Jiangsu, 221004, People's Republic of China.
| | - Yulan Wang
- Department of Human Anatomy, Xuzhou Medical University, Xuzhou, Jiangsu, 221004, People's Republic of China.
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Cava C, Manna I, Gambardella A, Bertoli G, Castiglioni I. Potential Role of miRNAs as Theranostic Biomarkers of Epilepsy. MOLECULAR THERAPY-NUCLEIC ACIDS 2018; 13:275-290. [PMID: 30321815 PMCID: PMC6197620 DOI: 10.1016/j.omtn.2018.09.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 09/11/2018] [Accepted: 09/11/2018] [Indexed: 12/18/2022]
Abstract
Epilepsy includes a group of disorders of the brain characterized by an enduring predisposition to generate epileptic seizures. Although familial epilepsy has a genetic component and heritability, the etiology of the majority of non-familial epilepsies has no known associated genetic mutations. In epilepsy, recent epigenetic profiles have highlighted a possible role of microRNAs in its pathophysiology. In particular, molecular profiling identifies a significant number of microRNAs (miRNAs) altered in epileptic hippocampus of both animal models and human tissues. In this review, analyzing molecular profiles of different animal models of epilepsy, we identified a group of 20 miRNAs commonly altered in different epilepsy-animal models. As emerging evidences highlighted the poor overlap between signatures of animal model tissues and human samples, we focused our analysis on miRNAs, circulating in human biofluids, with a principal role in epilepsy hallmarks, and we identified a group of 8 diagnostic circulating miRNAs. We discussed the functional role of these 8 miRNAs in the epilepsy hallmarks. A few of them have also been proposed as therapeutic molecules for epilepsy treatment, revealing a great potential for miRNAs as theranostic molecules in epilepsy.
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Affiliation(s)
- Claudia Cava
- Institute of Molecular Bioimaging and Physiology (IBFM), National Research Council (CNR), Milan, Italy
| | - Ida Manna
- Institute of Molecular Bioimaging and Physiology (IBFM), National Research Council (CNR), Section of Germaneto, 88100 Catanzaro, Italy
| | - Antonio Gambardella
- Institute of Neurology, Department of Medical and Surgical Sciences, University "Magna Graecia," Germaneto, 88100 Catanzaro, Italy.
| | - Gloria Bertoli
- Institute of Molecular Bioimaging and Physiology (IBFM), National Research Council (CNR), Milan, Italy.
| | - Isabella Castiglioni
- Institute of Molecular Bioimaging and Physiology (IBFM), National Research Council (CNR), Milan, Italy
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10
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Wang J, Xu W, Shao J, He Z, Ding Z, Huang J, Guo Q, Zou W. miR-219-5p targets CaMKIIγ to attenuate morphine tolerance in rats. Oncotarget 2018; 8:28203-28214. [PMID: 28423675 PMCID: PMC5438643 DOI: 10.18632/oncotarget.15997] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 02/27/2017] [Indexed: 12/27/2022] Open
Abstract
Morphine tolerance is a clinical challenge in pain management. Emerging evidence suggests that microRNA (miRNA) plays a regulatory role in the development of morphine tolerance. miR-219-5p (miR-219) targets calmodulin-dependent protein kinase II γ (CaMKIIγ) to activate central pain sensitization via N-methyl-D-aspartate (NMDA) receptor. Therefore, we hypothesized that miR-219-5p attenuates morphine tolerance by targeting CaMKIIγ. We found that the expression of miR-219-5p was decreased significantly after chronic morphine treatment. Overexpression of miR-219-5p by lentivirus injection prevents the development of morphine tolerance. CaMKIIγ, the target gene of miR-219-5p was downregulated by overexpression of miR-219-5p both in vivo and in vitro. Furthermore, we found that lentiviral-mediated miR-219-5p decreased the expression of NMDA receptor subunit 1 (NR1), leading to attenuation of morphine tolerance. Overall, the data demonstrate that miR-219-5p plays a crucial role in alleviating morphine tolerance by inhibiting the CaMKII/NMDA receptor pathway. Overexpression of miR-219-5p may be a potential strategy to ameliorate morphine tolerance.
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Affiliation(s)
- Jian Wang
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Wei Xu
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Jiali Shao
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Zhenghua He
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Zhuofeng Ding
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Jiangju Huang
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Qulian Guo
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Wangyuan Zou
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
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Yan S, Zhang H, Xie W, Meng F, Zhang K, Jiang Y, Zhang X, Zhang J. Altered microRNA profiles in plasma exosomes from mesial temporal lobe epilepsy with hippocampal sclerosis. Oncotarget 2018; 8:4136-4146. [PMID: 27926529 PMCID: PMC5354818 DOI: 10.18632/oncotarget.13744] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 11/23/2016] [Indexed: 12/24/2022] Open
Abstract
Mesial temporal lobe epilepsy with hippocampal sclerosis (mTLE-HS) is the most common type of focal epilepsy. The present study aimed to explore the expression and functions of exosomal microRNAs in mTLE-HS. A total of 50 microRNAs were found to be differentially expressed in mTLE-HS compared with healthy controls. Among them, 2 were increased and 48 were decreased. The 6 significant differentially expressed candidate microRNAs (miR-3613-5p, miR-4668-5p, miR-8071, miR-197-5p, miR-4322, and miR-6781-5p ) in exosome were validated. The bioinformatics analysis showed that the potential target genes of these microRNAs were involved in biological processes, molecular functions, and cellular components. Similarly, these microRNAs also affected axon guidance, pathways in cancer, regulation of the actin cytoskeleton, focal adhesion, the calcium signaling pathway, the MAPK signaling pathway, and the PI3K-Akt signaling pathway. Among 6 candidate microRNAs, miR-8071 had the best diagnostic value for mTLE-HS with 83.33% sensitivity and 96.67% specificity, and was associated with seizure severity. This study indicated that exosomal microRNAs, may be regulators for the seizure development in mTLE-HS, and can be used as potential therapeutic targets and biomarker for diagnosis in mTLE-HS.
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Affiliation(s)
- Shaofeng Yan
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Hua Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Wenyan Xie
- Department of Clinical Laboratory, Qian Fo Shan Hospital of Shandong Province, Jinan, Shandong Province, China
| | - Fangang Meng
- Department of Functional Neurosurgery, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - Kai Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yin Jiang
- Department of Functional Neurosurgery, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - Xin Zhang
- Department of Functional Neurosurgery, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
| | - Jianguo Zhang
- Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.,Department of Functional Neurosurgery, Beijing Neurosurgical Institute, Capital Medical University, Beijing, China
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Mo JL, Liu Q, Kou ZW, Wu KW, Yang P, Chen XH, Sun FY. MicroRNA-365 modulates astrocyte conversion into neuron in adult rat brain after stroke by targeting Pax6. Glia 2018; 66:1346-1362. [PMID: 29451327 PMCID: PMC6001668 DOI: 10.1002/glia.23308] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 01/18/2018] [Accepted: 01/29/2018] [Indexed: 01/01/2023]
Abstract
Reactive astrocytes induced by ischemia can transdifferentiate into mature neurons. This neurogenic potential of astrocytes may have therapeutic value for brain injury. Epigenetic modifications are widely known to involve in developmental and adult neurogenesis. PAX6, a neurogenic fate determinant, contributes to the astrocyte‐to‐neuron conversion. However, it is unclear whether microRNAs (miRs) modulate PAX6‐mediated astrocyte‐to‐neuron conversion. In the present study we used bioinformatic approaches to predict miRs potentially targeting Pax6, and transient middle cerebral artery occlusion (MCAO) to model cerebral ischemic injury in adult rats. These rats were given striatal injection of glial fibrillary acidic protein targeted enhanced green fluorescence protein lentiviral vectors (Lv‐GFAP‐EGFP) to permit cell fate mapping for tracing astrocytes‐derived neurons. We verified that miR‐365 directly targets to the 3′‐UTR of Pax6 by luciferase assay. We found that miR‐365 expression was significantly increased in the ischemic brain. Intraventricular injection of miR‐365 antagomir effectively increased astrocytic PAX6 expression and the number of new mature neurons derived from astrocytes in the ischemic striatum, and reduced neurological deficits as well as cerebral infarct volume. Conversely, miR‐365 agomir reduced PAX6 expression and neurogenesis, and worsened brain injury. Moreover, exogenous overexpression of PAX6 enhanced the astrocyte‐to‐neuron conversion and abolished the effects of miR‐365. Our results demonstrate that increase of miR‐365 in the ischemic brain inhibits astrocyte‐to‐neuron conversion by targeting Pax6, whereas knockdown of miR‐365 enhances PAX6‐mediated neurogenesis from astrocytes and attenuates neuronal injury in the brain after ischemic stroke. Our findings provide a foundation for developing novel therapeutic strategies for brain injury.
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Affiliation(s)
- Jia-Lin Mo
- Department of Neurobiology and State Key Laboratory of Medical Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Qi Liu
- Department of Neurobiology and State Key Laboratory of Medical Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Zeng-Wei Kou
- Department of Neurobiology and State Key Laboratory of Medical Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Kun-Wei Wu
- Department of Neurobiology and State Key Laboratory of Medical Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Institute for Basic Research on Aging and Medicine, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Ping Yang
- Department of Neurobiology and State Key Laboratory of Medical Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Xian-Hua Chen
- Department of Neurobiology and State Key Laboratory of Medical Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Feng-Yan Sun
- Department of Neurobiology and State Key Laboratory of Medical Neurobiology, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Shanghai Key Laboratory of Clinical Geriatric Medicine, Research Center on Aging and Medicine, Shanghai Medical College, Fudan University, Shanghai, 200032, China.,Institute for Basic Research on Aging and Medicine, School of Basic Medical Sciences, Shanghai Medical College, Fudan University, Shanghai, 200032, China
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Chen C, Li B, Cheng G, Yang X, Zhao N, Shi R. Amentoflavone Ameliorates Aβ 1-42-Induced Memory Deficits and Oxidative Stress in Cellular and Rat Model. Neurochem Res 2018; 43:857-868. [PMID: 29411261 DOI: 10.1007/s11064-018-2489-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 01/23/2018] [Accepted: 01/30/2018] [Indexed: 12/25/2022]
Abstract
Alzheimer's disease (AD), a progressive neurodegenerative disease of the central nervous system, is the most common cause of senile dementia. This study aimed to investigate whether amentoflavone (AF), a biflavonoid compound, could exert neuroprotective activities against AD. The AD model was established by the intracranial injection of amyloid-beta (Aβ) in rat models. The effect of AF on cognitive function was examined using the Morris water maze test. Cell survival and apoptosis in the hippocampal region in an animal model were detected using Nissl staining and a terminal deoxynucleotidyl transferased UTP nick-end labeling assay, respectively. The levels of oxidant enzymes were determined by enzyme-linked immunosorbent assay. Signaling molecule expressions were examined by western blotting. Our results showed that AF significantly attenuated Aβ-induced deficits in neurological functions as well as neuronal cell death and apoptosis in the hippocampal region. Moreover, our findings revealed that AF increased nuclear factor erythroid 2-related factor 2 (Nrf2) expression and translocation and activated AMP-activated protein kinase (AMPK) signaling. In a cellular model of AD established by exposing PC12 cells to Aβ, our results provided further evidence that the neuroprotective activities of AF were mediated by modulating Nrf2 through AMPK/glycogen synthase kinase 3 beta signaling. AF exerts a protective effect against Aβ1-42-induced neurotoxcicity by inducing Nrf2 antioxidant pathways via AMPK signaling activation, which provided experimental evidence that AF might provide a clinical benefit to patients with AD.
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Affiliation(s)
- Chao Chen
- Department of Traditional Chinese Medicine, Shandong Qianfoshan Hospital, 16766 Jingshi Road, Jinan, 250014, China
| | - Bin Li
- Department of Neurology, The Affiliated Hiser Hospital of Qingdao University, Qingdao, China
| | - Guangqing Cheng
- Department of Traditional Chinese Medicine, Shandong Qianfoshan Hospital, 16766 Jingshi Road, Jinan, 250014, China
| | - Xiaoni Yang
- Department of Traditional Chinese Medicine, Shandong Qianfoshan Hospital, 16766 Jingshi Road, Jinan, 250014, China
| | - Ningning Zhao
- Department of Traditional Chinese Medicine, Shandong Qianfoshan Hospital, 16766 Jingshi Road, Jinan, 250014, China
| | - Ran Shi
- Department of Traditional Chinese Medicine, Shandong Qianfoshan Hospital, 16766 Jingshi Road, Jinan, 250014, China.
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Cui ZQ, Li WL, Luo Y, Yang JP, Qu ZZ, Zhao WQ. Methylene Blue Exerts Anticonvulsant and Neuroprotective Effects on Self-Sustaining Status Epilepticus (SSSE) Induced by Prolonged Basolateral Amygdala Stimulation in Wistar Rats. Med Sci Monit 2018; 24:161-169. [PMID: 29307885 PMCID: PMC5771162 DOI: 10.12659/msm.907758] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 12/18/2017] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND This study was designed to investigate the potential anticonvulsant and neuroprotective effects of methylene blue (MB) on self-sustaining status epilepticus (SSSE) induced by prolonged basolateral amygdala stimulation (BLA) in Wistar rats. MATERIAL AND METHODS The rats were randomly divided into 4 groups: (1) the Control group (rats without any treatment); (2) the Sham group (rats received electrode implantation but without electrical stimulation); (3) the SSSE group (rats received electrode implantation and additional electrical stimulation); and (4) the SSSE+MB group (rats received 1 mg/kg MB intraperitoneal injection 5 min after SSSE). SSSE models were established by prolonged BLA stimulation. The severities of SSSE were assessed by the number of separate seizures and the accumulated time of seizures. The variations of malondialdehyde/glutathione (MDA/GSH) were assessed 24 h after the establishment of SSSE. Nissl staining was performed to detect the surviving neurons in hippocampal CA1 and CA3 regions, and Western blotting assays were used to detect Caspase-3 (CASP3), B cell lymphoma 2 (BCL2), and BCL2-associated X protein (BAX). RESULTS Compared with the SSSE group, treatment with MB (1) markedly reduced the number and accumulated time of seizure activities; (2) significantly attenuated the increase of MDA and the decrease of GSH hippocampal levels; (3) markedly improved the cell morphology and alleviated the neuronal loss in hippocampal CA1 and CA3 regions; (4) significantly attenuated the increase of CASP3 and BAX and the decrease of BCL2 hippocampal levels. CONCLUSIONS MB has a protective effect in the SSSE model and may be useful as an adjuvant for preventing or treating epilepsy in humans.
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Affiliation(s)
- Zhi-qiang Cui
- Faculty of Graduate Studies, Hebei Medical University, Shijiazhuang, Hebei, P.R. China
| | - Wen-ling Li
- Department of Neurosurgery, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, P.R. China
| | - Yan Luo
- Department of Reproductive Genetic, Hebei General Hospital, Shijiazhuang, Hebei, P.R. China
| | - Ji-peng Yang
- Department of Neurosurgery, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, P.R. China
| | - Zhen-zhen Qu
- Department of Neurosurgery, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei, P.R. China
| | - Wen-qing Zhao
- Faculty of Graduate Studies, Hebei Medical University, Shijiazhuang, Hebei, P.R. China
- Department of Functional Neurosurgery, Hebei General Hospital, Shijiazhuang, Hebei, P.R. China
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Systematic review and meta-analysis of differentially expressed miRNAs in experimental and human temporal lobe epilepsy. Sci Rep 2017; 7:11592. [PMID: 28912503 PMCID: PMC5599629 DOI: 10.1038/s41598-017-11510-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 08/25/2017] [Indexed: 01/08/2023] Open
Abstract
Temporal lobe epilepsy (TLE) is a common chronic neurological disease in humans. A number of studies have demonstrated differential expression of miRNAs in the hippocampus of humans with TLE and in animal models of experimental epilepsy. However, the dissimilarities in experimental design have led to largely discordant results across these studies. Thus, a comprehensive comparison is required in order to better characterize miRNA profiles obtained in various post-status epilepticus (SE) models. We therefore created a database and performed a meta-analysis of differentially expressed miRNAs across 3 post-SE models of epileptogenesis (electrical stimulation, pilocarpine and kainic acid) and human TLE with hippocampal sclerosis (TLE-HS). The database includes data from 11 animal post-SE studies and 3 human TLE-HS studies. A total of 378 differentially expressed miRNAs were collected (274 up-regulated and 198 down-regulated) and analyzed with respect to the post-SE model, time point and animal species. We applied the novel robust rank aggregation method to identify consistently differentially expressed miRNAs across the profiles. It highlighted common and unique miRNAs at different stages of epileptogenesis. The pathway analysis revealed involvement of these miRNAs in key pathogenic pathways underlying epileptogenesis, including inflammation, gliosis and deregulation of the extracellular matrix.
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Wang J, Xu W, Zhong T, Song Z, Zou Y, Ding Z, Guo Q, Dong X, Zou W. miR-365 targets β-arrestin 2 to reverse morphine tolerance in rats. Sci Rep 2016; 6:38285. [PMID: 27922111 PMCID: PMC5138852 DOI: 10.1038/srep38285] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 11/07/2016] [Indexed: 01/08/2023] Open
Abstract
Morphine tolerance is a challenging clinical problem that limits its clinical application in pain treatment. Non-coding microRNAs (miRNAs) modulate gene expression in a post transcriptional manner, and their dysregulation causes various diseases. However, the significance of miRNAs in morphine tolerance is still poorly understood. In the present study, we hypothesized that microRNA-365 (miR-365) is a key functional small RNA that reverses morphine tolerance through regulation of β-arrestin 2 in rats. Here, microarray analysis and quantitative real-time PCR showed that miR-365 was robustly decreased in the spinal cord after chronic morphine administration. In situ hybridization and immunochemistry double staining showed that miR-365 was expressed in neurons of the spinal cord. We identified β-arrestin 2 as the target gene of miR-365 by bioinformatics analysis and luciferase reporter assay. The data showed that overexpression of miR-365 prevented and reversed established morphine tolerance, and increased expression of miR-365 caused a decrease in expression of β-arrestin 2 protein. miR-365 downregulation is involved in the development and maintenance of morphine tolerance through regulation of β-arrestin 2, and miR-365 upregulation provides a promising and novel approach for treatment of morphine tolerance.
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Affiliation(s)
- Jian Wang
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Wei Xu
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Tao Zhong
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Zongbin Song
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Yu Zou
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Zhuofeng Ding
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Qulian Guo
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Xinzhong Dong
- The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University, School of Medicine, Baltimore, Maryland 21205, USA
- Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | - Wangyuan Zou
- Department of Anesthesiology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
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de Araújo MA, Marques TEBS, Octacílio-Silva S, de Arroxelas-Silva CL, Pereira MGAG, Peixoto-Santos JE, Kandratavicius L, Leite JP, Garcia-Cairasco N, Castro OW, Duzzioni M, Passos GA, Paçó-Larson ML, Góes Gitaí DL. Identification of microRNAs with Dysregulated Expression in Status Epilepticus Induced Epileptogenesis. PLoS One 2016; 11:e0163855. [PMID: 27695061 PMCID: PMC5047645 DOI: 10.1371/journal.pone.0163855] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 09/15/2016] [Indexed: 11/18/2022] Open
Abstract
The involvement of miRNA in mesial temporal lobe epilepsy (MTLE) pathogenesis has increasingly become a focus of epigenetic studies. Despite advances, the number of known miRNAs with a consistent expression response during epileptogenesis is still small. Addressing this situation requires additional miRNA profiling studies coupled to detailed individual expression analyses. Here, we perform a miRNA microarray analysis of the hippocampus of Wistar rats 24 hours after intra-hippocampal pilocarpine-induced Status Epilepticus (H-PILO SE). We identified 73 miRNAs that undergo significant changes, of which 36 were up-regulated and 37 were down-regulated. To validate, we selected 5 of these (10a-5p, 128a-3p, 196b-5p, 352 and 324-3p) for RT-qPCR analysis. Our results confirmed that miR-352 and 196b-5p levels were significantly higher and miR-128a-3p levels were significantly lower in the hippocampus of H-PILO SE rats. We also evaluated whether the 3 miRNAs show a dysregulated hippocampal expression at three time periods (0h, 24h and chronic phase) after systemic pilocarpine-induced status epilepticus (S-PILO SE). We demonstrate that miR-128a-3p transcripts are significantly reduced at all time points compared to the naïve group. Moreover, miR-196b-5p was significantly higher only at 24h post-SE, while miR-352 transcripts were significantly up-regulated after 24h and in chronic phase (epileptic) rats. Finally, when we compared hippocampi of epileptic and non-epileptic humans, we observed that transcript levels of miRNAs show similar trends to the animal models. In summary, we successfully identified two novel dysregulated miRNAs (196b-5p and 352) and confirmed miR-128a-3p downregulation in SE-induced epileptogenesis. Further functional assays are required to understand the role of these miRNAs in MTLE pathogenesis.
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Affiliation(s)
- Mykaella Andrade de Araújo
- Department of Cellular and Molecular Biology, Institute of Biological Sciences and Health, Federal University of Alagoas, Maceio, Alagoas, Brazil
| | | | - Shirley Octacílio-Silva
- Department of Morphology, Health and Biological Sciences Center, Federal University of Sergipe, Aracajú, Sergipe, Brazil
| | - Carmem Lúcia de Arroxelas-Silva
- Department of Cellular and Molecular Biology, Institute of Biological Sciences and Health, Federal University of Alagoas, Maceio, Alagoas, Brazil
| | | | - José Eduardo Peixoto-Santos
- Division of Neurology, Department of Neurosciences and Behavioral Sciences, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Ludmyla Kandratavicius
- Division of Neurology, Department of Neurosciences and Behavioral Sciences, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - João Pereira Leite
- Division of Neurology, Department of Neurosciences and Behavioral Sciences, Ribeirão Preto School of Medicine, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Norberto Garcia-Cairasco
- Department of Physiology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Olagide Wagner Castro
- Department of Physiology and Pharmacology, Institute of Biological Sciences and Health, Federal University of Alagoas, Maceio, Alagoas, Brazil
| | - Marcelo Duzzioni
- Department of Physiology and Pharmacology, Institute of Biological Sciences and Health, Federal University of Alagoas, Maceio, Alagoas, Brazil
| | - Geraldo Aleixo Passos
- Department of Genetics, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Maria Luisa Paçó-Larson
- Department of Cellular and Molecular Biology, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Daniel Leite Góes Gitaí
- Department of Cellular and Molecular Biology, Institute of Biological Sciences and Health, Federal University of Alagoas, Maceio, Alagoas, Brazil
- * E-mail:
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Tian Q, Xiao Q, Yu W, Gu M, Zhao N, Lü Y. The inhibition of transforming growth factor beta-activated kinase 1 contributed to neuroprotection via inflammatory reaction in pilocarpine-induced rats with epilepsy. Neuroscience 2016; 325:111-23. [DOI: 10.1016/j.neuroscience.2016.03.045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 02/22/2016] [Accepted: 03/16/2016] [Indexed: 11/26/2022]
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Cattani AA, Allene C, Seifert V, Rosenow F, Henshall DC, Freiman TM. Involvement of microRNAs in epileptogenesis. Epilepsia 2016; 57:1015-26. [PMID: 27207608 DOI: 10.1111/epi.13404] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/09/2016] [Indexed: 12/12/2022]
Abstract
Patients who have sustained brain injury or had developmental brain lesions present a non-negligible risk for developing delayed epilepsy. Finding therapeutic strategies to prevent development of epilepsy in at-risk patients represents a crucial medical challenge. Noncoding microRNA molecules (miRNAs) are promising candidates in this area. Indeed, deregulation of diverse brain-specific miRNAs has been observed in animal models of epilepsy as well as in patients with epilepsy, mostly in temporal lobe epilepsy (TLE). Herein we review deregulated miRNAs reported in epilepsy with potential roles in key molecular and cellular processes underlying epileptogenesis, namely neuroinflammation, cell proliferation and differentiation, migration, apoptosis, and synaptic remodeling. We provide an up-to-date listing of miRNAs altered in epileptogenesis and assess recent functional studies that have interrogated their role in epilepsy. Last, we discuss potential applications of these findings for the future development of disease-modifying therapeutic strategies for antiepileptogenesis.
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Affiliation(s)
| | | | - Volker Seifert
- Department of Neurosurgery, Goethe University, Frankfurt, Germany
| | - Felix Rosenow
- Department of Epileptology, Goethe-University, Frankfurt, Germany
| | - David C Henshall
- Physiology & Medical Physics Department, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Thomas M Freiman
- Department of Neurosurgery, Goethe University, Frankfurt, Germany
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Inhibition of miR-203 Reduces Spontaneous Recurrent Seizures in Mice. Mol Neurobiol 2016; 54:3300-3308. [PMID: 27165289 DOI: 10.1007/s12035-016-9901-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 05/03/2016] [Indexed: 01/03/2023]
Abstract
Inhibitory synaptic receptors are dysfunctional in epileptic brains, and agents that selectively target these receptors may be effective for the treatment of epilepsy. MicroRNAs interfere with the translation of target genes, including various synaptic proteins. Here, we show that miR-203 regulates glycine receptor-β (Glrb) in epilepsy models. miR-203 is upregulated in the hippocampus of epileptic mice and human epileptic brains and is predicted to target inhibitory synaptic receptors, including Glrb. In vitro transfection, target gene luciferase assays, and analysis of human samples confirmed the direct inhibition of GLRB by miR-203, and AM203, an antagomir targeting miR-203, reversed the effect of miR-203. When intranasal AM203 was administered, AM203 reached the brain and restored hippocampal GLRB levels in epileptic mice. Finally, intranasal AM203 reduced the epileptic seizure frequency of mice. Overall, this study suggests that GLRB expression in the epileptic brain is controlled by miR-203, and intranasal delivery of AM203 showed therapeutic effects in chronic epilepsy mice.
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Wang J, Tan L, Tan L, Tian Y, Ma J, Tan CC, Wang HF, Liu Y, Tan MS, Jiang T, Yu JT. Circulating microRNAs are promising novel biomarkers for drug-resistant epilepsy. Sci Rep 2015; 5:10201. [PMID: 25984652 PMCID: PMC4435024 DOI: 10.1038/srep10201] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Accepted: 04/02/2015] [Indexed: 12/12/2022] Open
Abstract
MicroRNAs (miRNAs) open up a new field for molecular diagnosis for cancer and other diseases based on their stability in serum. However, the role of circulating miRNAs in plasma/serum in epilepsy diagnosis is still unclear. The aim of this study was to evaluate whether miRNAs can be used as biomarkers for drug-resistant epilepsy. We measured the differences in serum miRNA levels between 30 drug-resistant patients and 30 drug-responsive epilepsy patients in discovery and training phases using Illumina HiSeq2000 sequencing followed by quantitative reverse transcriptase polymerase chain reaction (qRT-PCR) assays. The selected miRNAs were then validated in 77 drug-resistant epilepsy patients, 81 drug-responsive epilepsy patients and 85 healthy controls by qRT-PCR. We found that circulating miRNAs are differentially expressed between drug-resistant group and drug-responsive group. MiR-194-5p, -301a-3p, -30b-5p, -342-5p and -4446-3p were significantly deregulated in drug-resistant group compared to drug-responsive group and control group. Among these 5 miRNAs, miR-301a-3p had the best diagnostic value for drug-resistant epilepsy with 80.5% sensitivity and 81.2% specificity, and was negatively associated with seizure severity. These provide the rationale for further confirmation studies in larger prospective cohorts and in other ethnics.
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Affiliation(s)
- Jun Wang
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
| | - Lan Tan
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
- Department of Neurology, Qingdao Municipal Hospital, College of Medicine and Pharmaceutics, Ocean University of China, Qingdao, China
- Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, Qingdao, China
- Department of Neurology, Qingdao Municipal Hospital, Dalian Medical University, China
| | - Lin Tan
- Department of Neurology, Qingdao Municipal Hospital, College of Medicine and Pharmaceutics, Ocean University of China, Qingdao, China
| | - Yan Tian
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
| | - Jing Ma
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
| | - Chen-Chen Tan
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
| | - Hui-Fu Wang
- Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, Qingdao, China
| | - Ying Liu
- Department of Neurology, Qingdao Municipal Hospital, Dalian Medical University, China
| | - Meng-Shan Tan
- Department of Neurology, Qingdao Municipal Hospital, College of Medicine and Pharmaceutics, Ocean University of China, Qingdao, China
| | - Teng Jiang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Qingdao, China
| | - Jin-Tai Yu
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
- Department of Neurology, Qingdao Municipal Hospital, College of Medicine and Pharmaceutics, Ocean University of China, Qingdao, China
- Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, Qingdao, China
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Involvement of GluR2 up-regulation in neuroprotection by electroacupuncture pretreatment via cannabinoid CB1 receptor in mice. Sci Rep 2015; 5:9490. [PMID: 25830356 PMCID: PMC4381620 DOI: 10.1038/srep09490] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 02/19/2015] [Indexed: 01/05/2023] Open
Abstract
We investigated whether glutamate receptor subunit 2 (GluR2) is involved in EA pretreatment-induced neuroprotection via cannabinoid CB1 receptors (CB1R) after global cerebral ischemia in mice. Two hours after electric acupuncture (EA) pretreatment, global cerebral ischemia (GCI) was induced by bilateral common carotid artery occlusion (BCCAO) for 20 min. The GluR2 expression was examined in the hippocampus after reperfusion. Cell survival, neuronal apoptosis, the Bax/Bcl-2 ratio and neurological scores were evaluated at 24 h after BCCAO in the presence or absence of the GluR2 inhibitor. Furthermore, the GluR2 was determined in the presence and absence of CB1R inhibitor. Our results showed EA pretreatment enhanced expression of GluR2 in the hippocampus 2 h after reperfusion. Moreover, EA pretreatment improved neurological outcome, promoted cell survival, inhibited neuronal apoptosis, and decreased the Bax/Bcl-2 ratio after reperfusion. GluR2 knockdown by GluR2 siRNA effectively reversed the beneficial effects of EA pretreatment. Furthermore, CB1R siRNA and two CB1R antagonists blocked the elevation of GluR2 expression by EA pretreatment, whereas the two CB1R agonists up-regulated GluR2 expression as EA pretreatment. In conclusion, GluR2 up-regulation is involved in neuroprotection of EA pretreatment against GCI through CB1R, suggesting that GluR2 may be a novel target for stroke intervention.
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Wang J, Yu JT, Tan L, Tian Y, Ma J, Tan CC, Wang HF, Liu Y, Tan MS, Jiang T, Tan L. Genome-wide circulating microRNA expression profiling indicates biomarkers for epilepsy. Sci Rep 2015; 5:9522. [PMID: 25825351 PMCID: PMC4379481 DOI: 10.1038/srep09522] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Accepted: 03/03/2015] [Indexed: 11/10/2022] Open
Abstract
MicroRNAs (miRNAs) have been proposed as biomarkers for cancer and other diseases due to their stability in serum. In epilepsy, miRNAs have almost been studied in brain tissues and in animals' circulation, but not in circulation of human. To date, a major challenge is to develop biomarkers to improve the current diagnosis of epilepsy. The aim of this study was to evaluate whether circulating miRNAs can be used as biomarkers for epilepsy. We measured the differences in serum miRNA levels between 30 epilepsy patients and 30 healthy controls in discovery and training phases using Illumina HiSeq2000 sequencing followed by quantitative reverse transcriptase polymerase chain reaction (qRT-PCR) assays. The selected miRNAs were then validated in 117 epilepsy patients and 112 healthy controls by qRT-PCR. Let-7d-5p, miR-106b-5p, -130a-3p and -146a-5p were found up-regulated, whereas miR-15a-5p and -194-5p were down-regulated in epilepsy patients compared to controls (P < 0.0001). Among these miRNAs, miR-106b-5p had the best diagnostic value for epilepsy with 80.3% sensitivity and 81.2% specificity. Circulating miRNAs were differentially regulated in epilepsy patients as compared with controls. MiR-106b-5p may serve as a novel, noninvasive biomarker to improve the current diagnosis of epilepsy.
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Affiliation(s)
- Jun Wang
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
| | - Jin-Tai Yu
- 1] Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China [2] Department of Neurology, Qingdao Municipal Hospital, College of Medicine and Pharmaceutics, Ocean University of China, Qingdao, China [3] Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, Qingdao, China
| | - Lin Tan
- Department of Neurology, Qingdao Municipal Hospital, College of Medicine and Pharmaceutics, Ocean University of China, Qingdao, China
| | - Yan Tian
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
| | - Jing Ma
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
| | - Chen-Chen Tan
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
| | - Hui-Fu Wang
- Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, Qingdao, China
| | - Ying Liu
- Department of Neurology, Qingdao Municipal Hospital, Dalian Medical University, China
| | - Meng-Shan Tan
- Department of Neurology, Qingdao Municipal Hospital, College of Medicine and Pharmaceutics, Ocean University of China, Qingdao, China
| | - Teng Jiang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Qingdao, China
| | - Lan Tan
- 1] Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China [2] Department of Neurology, Qingdao Municipal Hospital, College of Medicine and Pharmaceutics, Ocean University of China, Qingdao, China [3] Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, Qingdao, China [4] Department of Neurology, Qingdao Municipal Hospital, Dalian Medical University, China
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Tan CC, Zhang JG, Tan MS, Chen H, Meng DW, Jiang T, Meng XF, Li Y, Sun Z, Li MM, Yu JT, Tan L. NLRP1 inflammasome is activated in patients with medial temporal lobe epilepsy and contributes to neuronal pyroptosis in amygdala kindling-induced rat model. J Neuroinflammation 2015; 12:18. [PMID: 25626361 PMCID: PMC4314732 DOI: 10.1186/s12974-014-0233-0] [Citation(s) in RCA: 135] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 12/28/2014] [Indexed: 12/19/2022] Open
Abstract
Background Temporal lobe epilepsy (TLE) is often characterized pathologically by severe neuronal loss in the hippocampus. Understanding the mechanisms of neuron death is key to preventing the neurodegeneration associated with TLE. However, the involvement of neuronal loss to the epileptogenic process has yet to be fully determined. Recent studies have shown that the activation of NLRP1 can generate a functional caspase-1-containing inflammasome in vivo to drive the proinflammatory programmed cell death termed ‘pyroptosis’, which has a key role in the pathogenesis of neurological disorders. To the best of our knowledge, there are no reported studies that performed detailed identification and validation of NLRP1 inflammasome during the epileptogenic process. Methods We first compared expression of NLRP1 and caspase-1 in resected hippocampus from patients with intractable mesial temporal lobe epilepsy (mTLE) with that of matched control samples. To further examine whether the activation of NLRP1 inflammasome contributes to neuronal pyroptosis, we employed a nonviral strategy to knock down the expression of NLRP1 and caspase-1 in the amygdala kindling-induced rat model. Proinflammatory cytokines levels and hippocampal neuronal loss were evaluated after 6 weeks of treatment in these NLRP1 or caspase-1 deficiency TLE rats. Results Western blotting detected upregulated NLRP1 levels and active caspase-1 in mTLE patients in comparison to those levels seen in the controls, suggesting a role for this inflammasome in mTLE. Moreover, we employed direct in vivo infusion of nonviral small interfering RNA to knockdown NLRP1 or caspase-1 in the amygdala kindling-induced rat model, and discovered that these NLRP1 or caspase-1 silencing rats resulted in significantly reduced neuronal pyroptosis. Conclusions Our data suggest that NLRP1/caspase-1 signaling participates in the seizure-induced degenerative process in humans and in the animal model of TLE and points to the silencing of NLRP1 inflammasome as a promising strategy for TLE therapy. Electronic supplementary material The online version of this article (doi:10.1186/s12974-014-0233-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Chen-Chen Tan
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, No.5 Donghai Middle Road, Qingdao, 266071, China.
| | - Jian-Guo Zhang
- Department of Functional Neurosurgery, Beijing Neurosurgical Institute, Capital Medical University, No.6, Tiantan Xili, Beijing, 100050, China. .,Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, No.6, Tiantan Xili, Beijing, 100050, China.
| | - Meng-Shan Tan
- College of Medicine and Pharmaceutics, Ocean University of China, No.5 Yushan Road, Qingdao, 266003, China.
| | - Hua Chen
- Department of Pathology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, No.5 Donghai Middle Road, Qingdao, 266071, China.
| | - Da-Wei Meng
- Department of Functional Neurosurgery, Beijing Neurosurgical Institute, Capital Medical University, No.6, Tiantan Xili, Beijing, 100050, China. .,Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, No.6, Tiantan Xili, Beijing, 100050, China.
| | - Teng Jiang
- Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, No.5 Donghai Middle Road, Qingdao, 266071, China.
| | - Xiang-Fei Meng
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, No.5 Donghai Middle Road, Qingdao, 266071, China.
| | - Ying Li
- Department of Pathology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, No.5 Donghai Middle Road, Qingdao, 266071, China.
| | - Zhen Sun
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, No.5 Donghai Middle Road, Qingdao, 266071, China.
| | - Meng-Meng Li
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, No.5 Donghai Middle Road, Qingdao, 266071, China.
| | - Jin-Tai Yu
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, No.5 Donghai Middle Road, Qingdao, 266071, China. .,College of Medicine and Pharmaceutics, Ocean University of China, No.5 Yushan Road, Qingdao, 266003, China. .,Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, No.5 Donghai Middle Road, Qingdao, 266071, China. .,Memory and Aging Center, Department of Neurology, University of California, San Francisco, CA, 94158, USA.
| | - Lan Tan
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, No.5 Donghai Middle Road, Qingdao, 266071, China. .,College of Medicine and Pharmaceutics, Ocean University of China, No.5 Yushan Road, Qingdao, 266003, China. .,Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, No.5 Donghai Middle Road, Qingdao, 266071, China.
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Chen L, Li X, Chen X. Prognostic significance of tissue miR-345 downregulation in non-small cell lung cancer. Int J Clin Exp Med 2015; 8:20971-6. [PMID: 26885027 PMCID: PMC4723872 DOI: pmid/26885027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 11/05/2015] [Indexed: 02/05/2023]
Abstract
BACKGROUND MiRNAs might function as oncogenes or tumor suppressor genes in the tumorigenesis process. Dysregulation of miR-345 is a frequent event in many types of human cancers. However, the tissue miR-345 expression level in non-small cell lung cancer (NSCLC) and its potential clinical significance remains unknown. MATERIALS AND METHODS Real-time PCR was conducted to evaluate the expression level of miR-345 in NSCLC tissues as well as cell lines. Then the association between tissue miR-345 expression level and clinical outcome was investigated. RESULTS The expression level of miR-345 was significantly decreased in NSCLC tissues and cell lines compared with the controls (P<0.05; P<0.01). Tissue miR-345 expression level was associated with various clinicopathological parameters including LN metastasis (P=0.012), distant metastasis (P=0.007), TNM stage (P=0.008) and grade (P=0.030). In addition, the NSCLC patients in thelow tissue miR-345 expression group had significantly shorter 5-year overall survival time than those in the high tissue miR-345expression group (P=0.016). Multivariate analysis showed that tissue miR-345 was an independent risk factor for NSCLC (HR=3.921, 95% CI: 2.285-10.540; P=0.008). CONCLUSIONS The expression level of miR-345 was reduced in NSCLC tissues and cell lines. Low tissue miR-345 expression was associated with progression and poor prognosis of NSCLC, indicating that tissue miR-345 may serve as a novel prognostic marker in NSCLC.
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Affiliation(s)
- Liming Chen
- Department of Oncology, The First Affiliated Hospital of Shantou University Medical College Shantou, Guangdong, China
| | - Xiaojie Li
- Department of Oncology, The First Affiliated Hospital of Shantou University Medical College Shantou, Guangdong, China
| | - Xiaojun Chen
- Department of Oncology, The First Affiliated Hospital of Shantou University Medical College Shantou, Guangdong, China
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Abstract
Epilepsy is a common, serious neurological disease characterized by recurring seizures. Such abnormal, excessive synchronous firing of neurons arises in part because of imbalances in excitation and inhibition in the brain. The process of epileptogenesis, during which the normal brain is transformed after injury to one capable of generating spontaneous seizures, is associated with large-scale changes in gene expression. These contribute to the remodelling of brain networks that permanently alters excitability. Components of the microRNA (miRNA) biogenesis pathway have been found to be altered in brain tissue from epilepsy patients and experimental epileptogenic insults result in select changes to miRNAs regulating neuronal microstructure, cell death, inflammation, and ion channels. Targeting key miRNAs has been shown to alter brain excitability and suppress or exacerbate seizures, indicating potential for miRNA-based therapeutics in epilepsy. Altered miRNA profiles in biofluids may be potentially useful biomarkers of epileptogenesis. In summary, miRNAs represent an important layer of gene expression control in epilepsy with therapeutic and biomarker potential.
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Meng XF, Tan L, Tan MS, Jiang T, Tan CC, Li MM, Wang HF, Yu JT. Inhibition of the NLRP3 inflammasome provides neuroprotection in rats following amygdala kindling-induced status epilepticus. J Neuroinflammation 2014; 11:212. [PMID: 25516224 PMCID: PMC4275944 DOI: 10.1186/s12974-014-0212-5] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 12/02/2014] [Indexed: 01/14/2023] Open
Abstract
Background NLRP3 inflammasome is proposed to regulate inflammation in several neurological diseases, but its role in epilepsy remains largely unknown. This study aimed to investigate the role of the NLRP3 inflammasome in neuroinflammation, spontaneous recurrent seizures (SRS) and hippocampal neuronal loss in rat brain following amygdala kindling-induced status epilepticus (SE). Methods We detected the protein levels of IL-1β and NLRP3 inflammasome components by Western blot in the hippocampus of shams and SE rats at different time points following SE. To further examine whether the activation of the NLRP3 inflammasome contributes to SE-associated neuronal damage, we employed a nonviral strategy to knock down NLRP3 and caspase-1 expression in brain before undergoing SE. Proinflammatory cytokine levels and hippocampal neuronal loss were evaluated at 12 hours and at 6 weeks following SE respectively in these NLRP3 and caspase-1 deficient rats. Meanwhile, SRS occurrence was evaluated through a 4-week video recording started 2 weeks after SE in these NLRP3 and caspase-1 deficient rats. Results IL-1β levels and NLRP3 inflammasome components levels dramatically increased at 3 hours after SE, and reached a maximum at 12 hours after SE compared with the control group. Knock down of NLRP3 or caspase-1 decreased the levels of IL-1β and IL-18 at 12 hours after SE, which was accompanied by a significant suppression in the development and severity of SRS during the chronic epileptic phase. Meanwhile, knock down of NLRP3 or caspase-1 led to a remarkable reduction of hippocampal neuronal loss in the CA1 and CA3 area of the hippocampus at 6 weeks after SE. Conclusions Our study provides the first evidence that the NLRP3 inflammasome was significantly up-regulated following SE. More importantly, we show that inhibition of the NLRP3 inflammasome provides neuroprotection in rats following SE. These findings suggest that NLRP3 may represent a potential target for the treatment of epileptogenesis Electronic supplementary material The online version of this article (doi:10.1186/s12974-014-0212-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Xiang-Fei Meng
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, PR China.
| | - Lan Tan
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, PR China. .,Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, Nanjing, PR China. .,Department of Neurology, Qingdao Municipal Hospital, College of Medicine and Pharmaceutics, Ocean University of China, Qingdao, PR China.
| | - Meng-Shan Tan
- Department of Neurology, Qingdao Municipal Hospital, College of Medicine and Pharmaceutics, Ocean University of China, Qingdao, PR China.
| | - Teng Jiang
- Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, PR China.
| | - Chen-Chen Tan
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, PR China.
| | - Meng-Meng Li
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, PR China.
| | - Hui-Fu Wang
- Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, Nanjing, PR China.
| | - Jin-Tai Yu
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, PR China. .,Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, Nanjing, PR China. .,Department of Neurology, Memory and Aging Center, University of California, San Francisco, CA, USA.
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Abstract
PURPOSE OF REVIEW This review provides a synthesis of recent profiling studies investigating microRNA (miRNA) changes in experimental and human epilepsy, and outlines mechanistic, therapeutic and diagnostic potentials of this research area for clinical practice. RECENT FINDINGS A series of studies in experimental and human epilepsy have undertaken large-scale expression profiling of miRNAs, key regulatory molecules in cells controlling protein levels. Levels of over 100 different miRNAs were found to either increase or decrease in the hippocampus, of which more than 20 were identified in more than one study, including higher levels of miR-23a, miR-34a, miR-132 and miR-146a. Altered levels of enzymes involved in miRNA biogenesis and function, including Dicer and Argonaute 2, have also been found in epileptic brain tissue. Functional studies using oligonucleotide-based inhibitors support roles for miRNAs in the control of cell death, synaptic structure, inflammation and the immune response. Finally, data show brain injuries that precipitate epilepsy generate unique miRNA profiles in biofluids. SUMMARY miRNA represents a potentially important mechanism controlling protein levels in epilepsy. As such, miRNAs might be targeted to prevent or disrupt epilepsy as well as serve as diagnostic biomarkers of epileptogenesis.
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Tan L, Yu JT, Tan L. Causes and Consequences of MicroRNA Dysregulation in Neurodegenerative Diseases. Mol Neurobiol 2014; 51:1249-62. [PMID: 24973986 DOI: 10.1007/s12035-014-8803-9] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Accepted: 06/22/2014] [Indexed: 12/12/2022]
Abstract
Neurodegenerative diseases, including Alzheimer's disease (AD), Parkinson's disease (PD), Huntington's disease (HD) and amyotrophic lateral sclerosis (ALS), originate from a loss of neurons in the central nervous system (CNS) and are severely debilitating. The incidence of neurodegenerative diseases increases with age, and they are expected to become more common due to extended life expectancy. Because of no clear mechanisms, these diseases have become a major challenge in neurobiology. It is well recognized that these disorders become the culmination of many different genetic and environmental influences. Prior studies have shown that microRNAs (miRNAs) are pathologically altered during the inexorable course of some neurodegenerative diseases, suggesting that miRNAs may be the contributing factor in neurodegeneration. Here, we review what is known about the involvement of miRNAs in the pathogenesis of neurodegenerative diseases. The biogenesis of miRNAs and various functions of miRNAs that act as the chief regulators will be discussed. We focus in particular on dysregulation of miRNAs which leads to several neurodegenerative diseases from three aspects: miRNA-generating disorders, miRNA-targeting genes and epigenetic alterations. Furthermore, recent evidences have shown that circulating miRNA expression levels are changed in patients with neurodegenerative diseases. Circulating miRNA expression levels are reported in patients in order to evaluate their application as biomarkers of these diseases. A discussion is included with a potential diagnostic biomarker and the possible future direction in exploring the nexus between miRNAs and various neurodegenerative diseases.
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Affiliation(s)
- Lin Tan
- College of Medicine and Pharmaceutics, Ocean University of China, Qingdao, China
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Li MM, Jiang T, Sun Z, Zhang Q, Tan CC, Yu JT, Tan L. Genome-wide microRNA expression profiles in hippocampus of rats with chronic temporal lobe epilepsy. Sci Rep 2014; 4:4734. [PMID: 24751812 PMCID: PMC3994440 DOI: 10.1038/srep04734] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Accepted: 04/01/2014] [Indexed: 12/18/2022] Open
Abstract
The expression and functions of microRNAs (miRNAs) in chronic temporal lobe epilepsy (TLE), the most common type of refractory epilepsy in adults, are poorly understood currently. In this study, status epilepticus evoked by amygdala stimulation was used to establish rat chronic TLE model. Two months later, high-throughput sequencing was employed to investigate miRNA expression profile in rat hippocampus, and six miRNAs were confirmed to be differentially expressed. Kyoto Encyclopedia of Genes and Genomes pathway analysis indicated that most of the target genes for these six miRNAs were associated with neuronal apoptosis. Meanwhile, the levels of miR-423-3p and miR-296-5p were correlated with the activity of caspase-3, an apoptosis indicator. Additionally, the loading of miR-423-3p was increased in RNA-induced silencing complex whilst caspase-6, a target of miR-423-3p, was reduced in chronic TLE rats. Collectively, our findings suggest that miRNAs may exert anti-apoptotic effects in chronic TLE.
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Affiliation(s)
- Meng-Meng Li
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
- These authors contributed equally to this work
| | - Teng Jiang
- Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, Qingdao, China
- These authors contributed equally to this work
| | - Zhen Sun
- Department of Neurology, Qingdao Municipal Hospital, Taishan Medical University, Qingdao, China
| | - Qun Zhang
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
| | - Chen-Chen Tan
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
| | - Jin-Tai Yu
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
- Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, Qingdao, China
- Department of Neurology, Qingdao Municipal Hospital, Taishan Medical University, Qingdao, China
| | - Lan Tan
- Department of Neurology, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
- Department of Neurology, Qingdao Municipal Hospital, Nanjing Medical University, Qingdao, China
- Department of Neurology, Qingdao Municipal Hospital, Taishan Medical University, Qingdao, China
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