1
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Wang L, Guo Q, Acharya S, Zheng X, Huynh V, Whitmore B, Yimit A, Malhotra M, Chatterji S, Rosin N, Labit E, Chipak C, Gorzo K, Haidey J, Elliott DA, Ram T, Zhang Q, Kuipers H, Gordon G, Biernaskie J, Guo J. Primary cilia signaling in astrocytes mediates development and regional-specific functional specification. Nat Neurosci 2024; 27:1708-1720. [PMID: 39103557 DOI: 10.1038/s41593-024-01726-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Accepted: 07/09/2024] [Indexed: 08/07/2024]
Abstract
Astrocyte diversity is greatly influenced by local environmental modulation. Here we report that the majority of astrocytes across the mouse brain possess a singular primary cilium localized to the cell soma. Comparative single-cell transcriptomics reveals that primary cilia mediate canonical SHH signaling to modulate astrocyte subtype-specific core features in synaptic regulation, intracellular transport, energy and metabolism. Independent of canonical SHH signaling, primary cilia are important regulators of astrocyte morphology and intracellular signaling balance. Dendritic spine analysis and transcriptomics reveal that perturbation of astrocytic cilia leads to disruption of neuronal development and global intercellular connectomes in the brain. Mice with primary ciliary-deficient astrocytes show behavioral deficits in sensorimotor function, sociability, learning and memory. Our results uncover a critical role for primary cilia in transmitting local cues that drive the region-specific diversification of astrocytes within the developing brain.
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Affiliation(s)
- Lizheng Wang
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Qianqian Guo
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Sandesh Acharya
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Xiao Zheng
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Vanessa Huynh
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Brandon Whitmore
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Askar Yimit
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Mehr Malhotra
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Siddharth Chatterji
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Nicole Rosin
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Department of Surgery, University of Calgary, Calgary, Alberta, Canada
- Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Elodie Labit
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Department of Surgery, University of Calgary, Calgary, Alberta, Canada
- Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Colten Chipak
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Kelsea Gorzo
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada
| | - Jordan Haidey
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada
| | - David A Elliott
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Tina Ram
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
| | - Qingrun Zhang
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Mathematics and Statistics, University of Calgary, Calgary, Alberta, Canada
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Alberta, Canada
| | - Hedwich Kuipers
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Clinical Neuroscience, University of Calgary, Calgary, Alberta, Canada
| | - Grant Gordon
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada
| | - Jeff Biernaskie
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Department of Surgery, University of Calgary, Calgary, Alberta, Canada
- Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Jiami Guo
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, Alberta, Canada.
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada.
- Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada.
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Alberta, Canada.
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Yazarlou F, Lipovich L, Loeb JA. Emerging roles of long non-coding RNAs in human epilepsy. Epilepsia 2024; 65:1491-1511. [PMID: 38687769 PMCID: PMC11166529 DOI: 10.1111/epi.17937] [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: 09/01/2023] [Revised: 02/18/2024] [Accepted: 02/19/2024] [Indexed: 05/02/2024]
Abstract
Genome-scale biological studies conducted in the post-genomic era have revealed that two-thirds of human genes do not encode proteins. Most functional non-coding RNA transcripts in humans are products of long non-coding RNA (lncRNA) genes, an abundant but still poorly understood class of human genes. As a result of their fundamental and multitasking regulatory roles, lncRNAs are associated with a wide range of human diseases, including neurological disorders. Approximately 40% of lncRNAs are specifically expressed in the brain, and many of them exhibit distinct spatiotemporal patterns of expression. Comparative genomics approaches have determined that 65%-75% of human lncRNA genes are primate-specific and hence can be posited as a contributing potential cause of the higher-order complexity of primates, including human, brains relative to those of other mammals. Although lncRNAs present important mechanistic examples of epileptogenic functions, the human/primate specificity of lncRNAs questions their relevance in rodent models. Here, we present an in-depth review that supports the contention that human lncRNAs are direct contributors to the etiology and pathogenesis of human epilepsy, as a means to accelerate the integration of lncRNAs into clinical practice as potential diagnostic biomarkers and therapeutic targets. Meta-analytically, the major finding of our review is the commonality of lncRNAs in epilepsy and cancer pathogenesis through mitogen-activated protein kinase (MAPK)-related pathways. In addition, neuroinflammation may be a relevant part of the common pathophysiology of cancer and epilepsy. LncRNAs affect neuroinflammation-related signaling pathways such as nuclear factor kappa- light- chain- enhancer of activated B cells (NF-κB), Notch, and phosphatidylinositol 3- kinase/ protein kinase B (Akt) (PI3K/AKT), with the NF-κB pathway being the most common. Besides the controversy over lncRNA research in non-primate models, whether neuroinflammation is triggered by injury and/or central nervous system (CNS) toxicity during epilepsy modeling in animals or is a direct consequence of epilepsy pathophysiology needs to be considered meticulously in future studies.
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Affiliation(s)
- Fatemeh Yazarlou
- Center for Childhood Cancer, Abigail Wexner Research Institute, Nationwide Children’s Hospital, Columbus, OH, U.S.A
| | - Leonard Lipovich
- Shenzhen Huayuan Biological Science Research Institute, Shenzhen Huayuan Biotechnology Co. Ltd., 601 Building C1, Guangming Science Park, Fenghuang Street, 518000, Shenzhen, Guangdong, People’s Republic of China
- College of Science, Mathematics, and Technology, Wenzhou-Kean University, 88 Daxue Road, Ouhai District, 325060, Wenzhou, Zhejiang, People’s Republic of China
- Center for Molecular Medicine and Genetics, School of Medicine, Wayne State University, 3222 Scott Hall, 540 E. Canfield St., Detroit, Michigan 48201, U.S.A
| | - Jeffrey A. Loeb
- Department of Neurology and Rehabilitation, University of Illinois at Chicago, Chicago, Illinois 60612, U.S.A
- University of Illinois NeuroRepository, University of Illinois at Chicago, Chicago, Illinois 60612, U.S.A
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Bai Y, Liu Z, Qian T, Peng Y, Ma H, Hu H, Cheng G, Wen H, Xie L, Zheng D, Geng Q, Wang J, Wang H. Single-nucleus RNA sequencing unveils critical regulators in various hippocampal neurons for anti-N-methyl-D-aspartate receptor encephalitis. Brain Pathol 2023:e13156. [PMID: 36942475 DOI: 10.1111/bpa.13156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 02/28/2023] [Indexed: 03/23/2023] Open
Abstract
Anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis is a neuropsychiatric disease with variable clinical manifestations caused by NMDAR autoantibody. The underlying molecular underpinnings of this disease are rarely characterized on a genomic scale. Anti-NMDAR encephalitis mainly affects the hippocampus, however, its effect on gene expression in hippocampal neurons is unclear at present. Here, we construct the active and passive immunization mouse models of anti-NMDAR encephalitis, and use single-nucleus RNA sequencing to investigate the diverse expression profile of neuronal populations isolated from different hippocampal regions. Dramatic changes in cell proportions and differentially expressed genes were observed in excitatory neurons of the dentate gyrus (DG) subregion. In addition, we found that ATP metabolism and biosynthetic regulators related genes in excitatory neurons of DG subregion were significantly affected. Kcnq1ot1 in inhibitory neurons and Meg3 in interneurons also changed. Notably, the latter two molecules exhibited opposite changes in different models. Therefore, the above genes were used as potential targets for further research on the pathological process of anti-NMDAR encephalitis. These data involve various hippocampal neurons, which delineate a framework for understanding the hippocampal neuronal circuit and the potential molecular mechanisms of anti-NMDAR encephalitis.
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Affiliation(s)
- Yunmeng Bai
- Department of Nephrology, Shenzhen Key Laboratory of Kidney Diseases, Shenzhen People's Hospital, the First Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, China
| | - Zhuhe Liu
- Department of Neurology, Guangzhou First People's Hospital, School of Medicine, Southern China University of Technology, Guangzhou, China
| | - Tinglin Qian
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Yu Peng
- Department of Neurology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Huan Ma
- Guangdong Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Hong Hu
- Department of Nephrology, Shenzhen Key Laboratory of Kidney Diseases, Shenzhen People's Hospital, the First Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, China
| | - Guangqing Cheng
- Department of Nephrology, Shenzhen Key Laboratory of Kidney Diseases, Shenzhen People's Hospital, the First Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, China
| | - Haixia Wen
- Department of Neurology, Guangzhou First People's Hospital, School of Medicine, Southern China University of Technology, Guangzhou, China
| | - Lulin Xie
- Department of Nephrology, Shenzhen Key Laboratory of Kidney Diseases, Shenzhen People's Hospital, the First Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, China
| | - Dong Zheng
- Department of Neurology, The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, China
| | - Qingshan Geng
- Department of Nephrology, Shenzhen Key Laboratory of Kidney Diseases, Shenzhen People's Hospital, the First Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, China
| | - Jigang Wang
- Department of Nephrology, Shenzhen Key Laboratory of Kidney Diseases, Shenzhen People's Hospital, the First Affiliated Hospital, School of Medicine, Southern University of Science and Technology, Shenzhen, China
| | - Honghao Wang
- Department of Neurology, Guangzhou First People's Hospital, School of Medicine, Southern China University of Technology, Guangzhou, China
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4
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LncRNA H19 Regulates P-glycoprotein Expression Through the NF-κB Signaling Pathway in the Model of Status Epilepticus. Neurochem Res 2023; 48:929-941. [PMID: 36394706 DOI: 10.1007/s11064-022-03803-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 10/15/2022] [Accepted: 10/18/2022] [Indexed: 11/18/2022]
Abstract
Pharmaco-resistance is a challenging problem for treatment of status epilepticus (SE) in the clinic. P-glycoprotein (P-gp) is one of the most important multi-drug transporters that contribute to drug resistance of SE. Long noncoding RNAs (lncRNAs) have been increasingly recognized as versatile regulators of P-gp in tumors and epilepsy. However, the function of lncRNAs in drug resistance of SE remains largely unknown. In the present study, pilocarpine-induced rat model is used to explore the expression profiles of lncRNAs in the hippocampus of SE using RNA sequencing. Our results implied that the level of lncRNA H19 was significantly increased in the hippocampus of SE rats, which was positively correlated with the level of P-gp. While downregulation of H19 could inhibit the expression of P-gp and alleviate neural damage in the hippocampus of SE rats. Furthermore, it was revealed that H19 regulates P-gp expression through the nuclear factor-kappaB (NF-κB) signaling pathway by functioning as a competing endogenous RNA against microRNA-29a-3p. Overall, our study indicated that H19 regulates P-gp expression and neural damage induced by SE through the NF-κB signaling pathway, which provides a promising target to overcome drug resistance and alleviate brain damage for SE.
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Wang X, Ren Z, Xu Y, Gao X, Huang H, Zhu F. KCNQ1OT1 sponges miR-34a to promote malignant progression of malignant melanoma via upregulation of the STAT3/PD-L1 axis. ENVIRONMENTAL TOXICOLOGY 2023; 38:368-380. [PMID: 36399467 DOI: 10.1002/tox.23687] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 09/30/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND Malignant melanoma is a leading cause of skin cancer-related death. In over 30% of cases, the melanoma is invasive and has a metastatic phenotype. KCNQ1 overlapping transcript 1 (KCNQ1OT1) was previously identified as an oncogenic long noncoding RNA (lncRNA). Our study intends to uncover the mechanism of KCNQ1OT1 functioning in melanoma. METHODS qRT-PCR, immunohistochemical analysis, and Western blotting were used to investigate mechanisms of the lncRNA KCNQ1OT1, on its downstream genes in melanoma tissues, cells as well as the impact on CD8+ T cells. Proliferation, apoptosis, and migration/invasion were assessed in melanoma cells to evaluate the effects of KCNQ1OT1, miR-34a, and signal transducer and activator of transcription 3 (STAT3). The RNA interactions were determined by dual-luciferase reporter, and melanoma cells were co-cultured with CD8+ T cells to study immune evasion. A lactate dehydrogenase (LDH) cytotoxicity assay was used to investigate the cytotoxicity of CD8+ T cells toward melanoma cells. The in vivo tumorigenic potential of KCNQ1OT1 was defined using xenograft models. RESULTS KCNQ1OT1 was upregulated in melanoma tissues leading to a poor prognosis, and knocking down it inhibited melanoma cell proliferation, migration, and invasion. KCNQ1OT1 regulated the progression of the melanoma via its action as a miR-34a sponge. STAT3 was found to be a downstream target of miR-34a, resulting in transcriptional regulation of Programmed cell death 1 ligand 1 (PD-L1). KCNQ1OT1 regulated STAT3 by targeting miR-34a. Knockdown of KCNQ1OT1 reduced PD-L1 level, enhanced CD8+ T cell cytotoxicity, and proliferation and inhibited apoptosis of CD8+ T cells. CONCLUSION Melanoma cells overexpressed KCNQ1OT1, which influenced the miR-34a/STAT3 axis, to promote proliferation, migration, and invasion of melanoma cells. In addition, KCNQ1OT1 inhibited CD8+ T cell function, also via the miR-34a/STAT3/PD-L1 axis, thus promoting immune evasion of melanoma cells. The current findings expose a potential therapeutic target of melanoma.
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Affiliation(s)
- Xin Wang
- Department of Plastic Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, People's Republic of China
| | - Zhiyao Ren
- Department of Breast Surgery, Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, People's Republic of China
| | - Yunfeng Xu
- Department of Breast Surgery, Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, People's Republic of China
| | - Xiang Gao
- Department of Plastic Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, People's Republic of China
| | - Hainian Huang
- Department of Plastic Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, People's Republic of China
| | - Fei Zhu
- Department of Plastic Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, People's Republic of China
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Kumar P. miRNA dysregulation in traumatic brain injury and epilepsy: a systematic review to identify putative biomarkers for post-traumatic epilepsy. Metab Brain Dis 2023; 38:749-765. [PMID: 36715879 DOI: 10.1007/s11011-023-01172-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Accepted: 01/18/2023] [Indexed: 01/31/2023]
Abstract
Traumatic brain injury (TBI) leads to post-traumatic epilepsy (PTE); hence, both TBI and PTE share various similar molecular mechanisms. MicroRNA (miRNA) is a small noncoding RNA that acts as a gene-silencing molecule. Notably, the dysregulation of miRNAs in various neurological diseases, including TBI and epilepsy, has been reported in several studies. However, studies on commonly dysregulated miRNAs and the regulation of shared pathways in both TBI and epilepsy that can identify potential biomarkers of PTE are still lacking. This systematic review covers the peer-review publications of TBI and database studies of epilepsy-dysregulated miRNAs of clinical studies. For TBI, 290 research articles were identified after screening, and 12 provided data for dysregulated miRNAs in humans. The compiled data suggest that 85 and 222 miRNAs are consecutively dysregulated in TBI and epilepsy. In both, 10 miRNAs were found to be commonly dysregulated, implying that they are potentially dysregulated miRNAs for PTE. Furthermore, the targets and involvement of each putative miRNA in different pathways were identified and evaluated. Additionally, clusters of predicted miRNAs were analyzed. Each miRNA's regulatory role was linked with apoptosis, inflammation, and cell cycle regulation pathways. Hence, these findings provide insight for future diagnostic biomarkers.
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Affiliation(s)
- Prince Kumar
- Department of Central Sophisticated Instrumentation Cell, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
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Xie Y, Shao Y, Gong X, Wang M, Chen Y. Evaluation of P-glycoprotein-targeting circulating microRNAs as peripheral biomarkers for medically intractable epilepsy. ACTA EPILEPTOLOGICA 2023. [DOI: 10.1186/s42494-022-00116-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Abstract
Background
Early diagnosis of medically intractable epilepsy is challenging in clinical work. P-glycoprotein (P-gp) is one of the most important multidrug efflux transporters, which has been demonstrated to contribute to the drug resistance of intractable epilepsy. The present study was aimed to explore the diagnostic value of microRNAs (miRNAs) targeting P-gp for medically intractable epilepsy.
Methods
Thirty-six patients with intractable epilepsy and 36 epilepsy patients responsive to anti-epilepsy drugs, who visited Jinshan Hospital of Fudan University from September 2014 to September 2016, were enrolled in this study. Clinical information of the patients was obtained by retrospectively reviewing medical records. MiRNAs with differential serum expression between the two groups of patients were detected by microarray assay. Meanwhile, miRNAs that were confirmed to regulate P-gp in vitro by western blot were selected for further validation. In the validation phase, reverse transcription quantitative PCR (RT-qPCR) was conducted to confirm the differential expression of the candidate miRNAs in the epilepsy cohorts. Receiver operating characteristic (ROC) curve analysis was carried out to evaluate the diagnostic value of the miRNAs for intractable epilepsy.
Results
Three miRNAs including miR-6514-3p, miR-6076-5p, and miR-6855-3p were identified to be candidate miRNAs by microarray assay. The results of western blotting validated that miR-146a-5p and miR-138-5p could regulate P-gp expression in vitro, so they were included in the candidate miRNAs for further validation. In the validation phase, the results of RT-qPCR indicated that compared with drug-responsive patients, the patients with intractable epilepsy showed decreased level of miR-138-5p and increased level of miR-146a-5p. The results of ROC curve analysis indicated that miR-138-5p (AUC = 0.877) and miR-146a-5p (AUC = 0.866) had high diagnostic value for intractable epilepsy. In addition, the miR-panel composed of miR-138-5p and miR-146a-5p showed higher diagnostic value (AUC = 0.926) than the miRNAs selected by microarray assay.
Conclusions
Our results indicated that the dysregulated miR-138-5p and miR-146a-5p which target P-gp expression have high potential as peripheral biomarkers for medically intractable epilepsy.
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Ghafouri-Fard S, Hussen BM, Jamali E, Branicki W, Taheri M, Akbari Dilmaghani N. Role of lncRNAs and circRNAs in epilepsy. Ageing Res Rev 2022; 82:101749. [PMID: 36216292 DOI: 10.1016/j.arr.2022.101749] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/02/2022] [Accepted: 10/05/2022] [Indexed: 02/09/2023]
Abstract
Epilepsy is a chronic disorder of with a high prevalence and extensive health burden in almost all age groups of the population. This condition is resulted from disturbance in the balance between excitatory and inhibitory factors in the brain. Genetic elements that affect synaptic connectivity, receptors functions or ion channels have been shown to predispose individuals to the epilepsy. More recently, a body of evidence points to the role of non-coding part of the transcriptome in the pathology of epilepsy. Expression levels of NEAT1, H19, PVT1, ILF3-AS1, GAS5, ZFAS1, UCA1, MALAT1 and SNHG1 have been changed in epileptic patients or animal models of epilepsy. Moreover, circ_ANKMY2, circRNA-0067835 and circHivep2 are among circRNAs which are involved in the pathogenesis of epilepsy. Although the mechanistical impact of these transcripts in the pathogenesis of epilepsy has not been fully explored, disturbances in neuron plasticity, apoptosis or differentiation might be implicated in this process. Expression levels of lncRNAs can be used for discrimination of epileptic patients from normal controls or refractory patients from non-refractory ones. JAK/STAT, Wnt, PI3K/AKT and NF-κB signaling pathways are among the regulated pathways by lncRNAs in the context of epilepsy. In the present review, we summarize the role of lncRNAs and circRNAs in the pathogenesis of epilepsy.
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Affiliation(s)
- Soudeh Ghafouri-Fard
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Bashdar Mahmud Hussen
- Department of Pharmacognosy, College of Pharmacy, Hawler Medical University, Kurdistan Region, Erbil, Iraq; Center of Research and Strategic Studies, Lebanese French University, Kurdistan Region, Erbil, Iraq
| | - Elena Jamali
- Department of Pathology, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Wojciech Branicki
- Institute of Zoology and Biomedical Research, Faculty of Biology, Jagiellonian University, Krakow, Poland
| | - Mohammad Taheri
- Urology and Nephrology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Institute of Human Genetics, Jena University Hospital, Jena, Germany.
| | - Nader Akbari Dilmaghani
- Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Jin X, Liao X, Wu L, Huang J, Li Z, Li Y, Guo F. FOXO4 alleviates hippocampal neuronal damage in epileptic mice via the miR-138-5p/ROCK2 axis. Am J Med Genet B Neuropsychiatr Genet 2022; 189:271-284. [PMID: 35796190 DOI: 10.1002/ajmg.b.32904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 04/15/2022] [Accepted: 05/28/2022] [Indexed: 02/01/2023]
Abstract
Epilepsy (EP) is one of the most universal neurological disorders. This study investigated the mechanism of forkhead box protein O4 (FOXO4) on hippocampal neuronal damage in EP mice. Initially, the EP mouse model and the in vitro HT-22 cell model were established. EP seizures and neuronal damage in mice were assessed. FOXO4, microRNA (miR)-138-5p, and rho-associated coiled-coil containing protein kinase 2 (ROCK2) levels in hippocampal tissues or HT-22 cells were examined. The cell viability and apoptosis of HT-22 cells were determined. The concentrations of oxidative stress markers and the levels of inflammatory cytokines in hippocampal tissues or HT-22 cells were detected. We found that FOXO4 was poorly expressed in EP. FOXO4 overexpression alleviated hippocampal neuronal damage in EP mice and improved HT-22 cell viability and inhibited apoptosis, and decreased oxidative stress and inflammation in hippocampal tissue and HT-22 cells. The bindings of miR-138-5p to FOXO4 and ROCK2 were analyzed, which showed that FOXO4 promoted miR-138-5p via binding to the miR-138-5p promoter region, and miR-138-5p inhibited ROCK2 expression. Joint experiments showed that miR-138-5p suppression or ROCK2 overexpression reversed the alleviation of FOXO4 overexpression on hippocampal neuronal damage. FOXO4 inhibited ROCK2 expression via promoting miR-138-5p expression, thus alleviating hippocampal neuronal damage in EP mice.
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Affiliation(s)
- Xin Jin
- Department of Pediatrics, Affiliated 3201 Hospital of Xi'an Jiaotong University, Hanzhong, Shannxi, China
| | - Xingjuan Liao
- Department of pediatrics, Taihe Hospital, Shiyan, Hubei, China
| | - Longfei Wu
- Department of neurology, Xinjiang Kashgar First People's Hospital, Kashgar, Xinjiang, China
| | - Jianling Huang
- Department of Pediatrics, Affiliated 3201 Hospital of Xi'an Jiaotong University, Hanzhong, Shannxi, China
| | - Zhimin Li
- Department of Pediatrics, Affiliated 3201 Hospital of Xi'an Jiaotong University, Hanzhong, Shannxi, China
| | - Yali Li
- Department of Pediatrics, Affiliated 3201 Hospital of Xi'an Jiaotong University, Hanzhong, Shannxi, China
| | - Fan Guo
- Department of pediatrics, Xixiang Hospital of Traditional Chinese Medicine, Xixiang, Shannxi, China
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Gong L, Han Y, Chen R, Yang P, Zhang C. LncRNA ZNF883-Mediated NLRP3 Inflammasome Activation and Epilepsy Development Involve USP47 Upregulation. Mol Neurobiol 2022; 59:5207-5221. [PMID: 35678979 DOI: 10.1007/s12035-022-02902-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 05/26/2022] [Indexed: 10/18/2022]
Abstract
The goal of this study was to characterize the mechanisms of long noncoding RNA (lncRNA) ZNF883 regulating NOD-like receptor 3 (NLRP3) inflammasome activation in epilepsy (EP). Rat and cellular EP models were established using pilocarpine and magnesium-free extracellular fluid, respectively, to detect the differential expression of ZNF883, microRNA (miR)-138-5p, ubiquitin-specific peptidase 47 (USP47), and NLRP3. The pathology of the hippocampal neurons was examined by whole-cell patch clamping. The expression of ZNF883, miR-138-5p, and USP47 was modified in epileptic neurons, and the EP rats were injected with sh-ZNF883. Then, alterations in ZNF883, miR-138-5p, and USP47 levels were measured. The histopathology of the hippocampus was detected, along with the detection of IL-6, IL-1β, TNF-α, and NLRP3. Neuronal apoptosis in the rat and cellular EP models was determined. The relationship among ZNF883, miR-138-5p, and USP47 as well as the regulation of NLRP3 ubiquitination by USP47 was determined. ZNF883, USP47, and NLRP3 were increasingly expressed and miR-138-5p was downregulated in epileptic neurons and rats, concurrent with aggravated inflammation and apoptosis. ZNF883 overexpression in epileptic neurons elevated USP47 expression. ZNF883 targeted miR-138-5p and miR-138-5p negatively regulated USP47. In epileptic neurons, inhibiting miR-138-5p or overexpressing USP47 partially reversed the ZNF883 silencing-induced inhibition on NLRP3 inflammasome activation, neuronal apoptosis, and epileptiform activity. ZNF883 silencing in EP rats decreased USP47 and NLRP3, increased miR-138-5p, and inhibited inflammation and apoptosis. USP47 reversed the ubiquitination of NLRP3. ZNF883 inhibits NLRP3 ubiquitination and promotes EP through upregulating USP47 by sponging miR-138-5p.
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Affiliation(s)
- Lina Gong
- Department of Neurology, the Third Xiangya Hospital of Central South University, No. 138 Tongzipo Road, Yuelu District, Changsha, Hunan, 410013, People's Republic of China
| | - Yaru Han
- Department of Neurology, the Third Xiangya Hospital of Central South University, No. 138 Tongzipo Road, Yuelu District, Changsha, Hunan, 410013, People's Republic of China
| | - Ru Chen
- Department of Neurology, the Third Xiangya Hospital of Central South University, No. 138 Tongzipo Road, Yuelu District, Changsha, Hunan, 410013, People's Republic of China
| | - Pu Yang
- Department of Neurology, the Third Xiangya Hospital of Central South University, No. 138 Tongzipo Road, Yuelu District, Changsha, Hunan, 410013, People's Republic of China
| | - Chen Zhang
- Department of Neurology, the Third Xiangya Hospital of Central South University, No. 138 Tongzipo Road, Yuelu District, Changsha, Hunan, 410013, People's Republic of China.
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11
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Bruxel EM, do Canto AM, Bruno DCF, Geraldis JC, Lopes-Cendes I. Multi-omic strategies applied to the study of pharmacoresistance in mesial temporal lobe epilepsy. Epilepsia Open 2021; 7 Suppl 1:S94-S120. [PMID: 34486831 PMCID: PMC9340306 DOI: 10.1002/epi4.12536] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 08/18/2021] [Accepted: 08/20/2021] [Indexed: 12/19/2022] Open
Abstract
Mesial temporal lobe epilepsy (MTLE) is the most common type of focal epilepsy in adults, and hippocampal sclerosis (HS) is a frequent histopathological feature in patients with MTLE. Pharmacoresistance is present in at least one-third of patients with MTLE with HS (MTLE+HS). Several hypotheses have been proposed to explain the mechanisms of pharmacoresistance in epilepsy, including the effect of genetic and molecular factors. In recent years, the increased knowledge generated by high-throughput omic technologies has significantly improved the power of molecular genetic studies to discover new mechanisms leading to disease and response to treatment. In this review, we present and discuss the contribution of different omic modalities to understand the basic mechanisms determining pharmacoresistance in patients with MTLE+HS. We provide an overview and a critical discussion of the findings, limitations, new approaches, and future directions of these studies to improve the understanding of pharmacoresistance in MTLE+HS. However, it is important to point out that, as with other complex traits, pharmacoresistance to anti-seizure medications is likely a multifactorial condition in which gene-gene and gene-environment interactions play an important role. Thus, studies using multidimensional approaches are more likely to unravel these intricate biological processes.
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Affiliation(s)
- Estela M Bruxel
- Departments of Translational Medicine, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, Brazil.,Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Campinas, Brazil
| | - Amanda M do Canto
- Departments of Translational Medicine, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, Brazil.,Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Campinas, Brazil
| | - Danielle C F Bruno
- Departments of Translational Medicine, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, Brazil.,Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Campinas, Brazil
| | - Jaqueline C Geraldis
- Departments of Translational Medicine, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, Brazil.,Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Campinas, Brazil
| | - Iscia Lopes-Cendes
- Departments of Translational Medicine, School of Medical Sciences, University of Campinas (UNICAMP), Campinas, Brazil.,Brazilian Institute of Neuroscience and Neurotechnology (BRAINN), Campinas, Brazil
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12
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Pant T, DiStefano JK, Logan S, Bosnjak ZJ. Emerging Role of Long Noncoding RNAs in Perioperative Neurocognitive Disorders and Anesthetic-Induced Developmental Neurotoxicity. Anesth Analg 2021; 132:1614-1625. [PMID: 33332892 DOI: 10.1213/ane.0000000000005317] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Preclinical investigations in animal models have consistently demonstrated neurobiological changes and life-long cognitive deficits following exposure to widely used anesthetics early in life. However, the mechanisms by which these exposures affect brain function remain poorly understood, therefore, limiting the efficacy of current diagnostic and therapeutic options in human studies. The human brain exhibits an abundant expression of long noncoding RNAs (lncRNAs). These biologically active transcripts play critical roles in a diverse array of functions, including epigenetic regulation. Changes in lncRNA expression have been linked with brain development, normal CNS processes, brain injuries, and the development of neurodegenerative diseases, and many lncRNAs are known to have brain-specific expression. Aberrant lncRNA expression has also been implicated in areas of growing importance in anesthesia-related research, including anesthetic-induced developmental neurotoxicity (AIDN), a condition defined by neurological changes occurring in patients repeatedly exposed to anesthesia, and the related condition of perioperative neurocognitive disorder (PND). In this review, we detail recent advances in PND and AIDN research and summarize the evidence supporting roles for lncRNAs in the brain under both normal and pathologic conditions. We also discuss lncRNAs that have been linked with PND and AIDN, and conclude with a discussion of the clinical potential for lncRNAs to serve as diagnostic and therapeutic targets for the prevention of these neurocognitive disorders and the challenges facing the identification and characterization of associated lncRNAs.
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Affiliation(s)
- Tarun Pant
- Department of Diabetes and Fibrotic Disease Unit, Translational Genomic Research Institute, Phoenix, Arizona
| | | | - Sara Logan
- Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Zeljko J Bosnjak
- From the Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin.,Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin
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13
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Wang J, Wu F, Li Y, Pang L, Wang X, Kong G, Zhang T, Yu D. KCNQ1OT1 accelerates gastric cancer progression via miR-4319/DRAM2 axis. Int J Immunopathol Pharmacol 2021; 34:2058738420954598. [PMID: 33100093 PMCID: PMC7786410 DOI: 10.1177/2058738420954598] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
INTRODUCTION This work was to explore the connection of KCNQ1 opposite strand/antisense transcript 1 (KCNQ1OT1) and microRNA-4319 (miR-4319), and to investigate the associated underlying mechanisms in gastric cancer (GC) progression. METHODS Quantitative real-time PCR was performed to measure KCNQ1OT1, miR-4319 and DNA-damage regulated autophagy modulator 2 (DRAM2) expression levels in GC cells. Moreover, expression level of KCNQ1OT1 and DRAM2 in GC tissues was analyzed at ENCORI website (http://starbase.sysu.edu.cn/index.php). Cell proliferation, colony formation assay and flow cytometry assays were performed to analyze effects of KCNQ1OT1, miR-4319 and DRAM2 on cell growth and death. Dual-luciferase activity reporter assay and RNA immunoprecipitation assay was conducted to verify the interactions of KCNQ1OT1 or DRAM2 and miR-4319. RESULTS AND CONCLUSION We found KCNQ1OT1 level was increased in tumor tissues and cells. Force the expression of KCNQ1OT1 promotes, while knockdown KCNQ1OT1 inhibits GC cell growth. Further studies indicated miR-4319 functioned as a bridge between KCNQ1OT1 and DRAM2. Finally, we showed KCNQ1OT1/miR-4319/DRAM2 axis regulates GC cell growth in vitro and in vivo. lncRNA KCNQ1OT1 promotes GC progression by sponging miR-4319 to upregulate DRAM2, indicating KCNQ1OT1 might be a promising target for GC treatment.
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Affiliation(s)
- Jijun Wang
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, China.,Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, Yangzhou University, Yangzhou, China
| | - Fan Wu
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, China.,Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, Yangzhou University, Yangzhou, China
| | - Yaoyao Li
- Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Lei Pang
- Department of Gastroenterology, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, China
| | - Xiaohong Wang
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, China.,Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, Yangzhou University, Yangzhou, China
| | - Guimei Kong
- Department of Laboratory Medicine, Medical College, Yangzhou University, Yangzhou, China
| | - Tong Zhang
- Xinghua People's Hospital, Yangzhou University, Xinghua, China
| | - Duonan Yu
- Institute of Translational Medicine, Medical College, Yangzhou University, Yangzhou, China.,Jiangsu Key Laboratory of Experimental & Translational Non-coding RNA Research, Yangzhou University, Yangzhou, China.,Xinghua People's Hospital, Yangzhou University, Xinghua, China
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14
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Wang J, Wang X, Ding X, Huang T, Song D, Tao H. EZH2 is associated with cartilage degeneration in osteoarthritis by promoting SDC1 expression via histone methylation of the microRNA-138 promoter. J Transl Med 2021; 101:600-611. [PMID: 33692439 DOI: 10.1038/s41374-021-00532-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 12/03/2020] [Accepted: 12/16/2020] [Indexed: 11/08/2022] Open
Abstract
Cartilage degeneration has been reported to deteriorate osteoarthritis (OA), a prevalent joint disease caused by intrinsic and epigenetic factors. This study aimed to examine the molecular mechanism of enhancer of zeste 2 polycomb repressive complex 2 subunit (EZH2)/microRNA-138 (miR-138)/syndecan 1 (SDC1) and its epigenetic regulation in cartilage degeneration in OA. An OA cell model was induced by stimulating chondrocytes with interleukin (IL)-1β at a final concentration of 10 ng/mL, followed by alterations in EZH2 and miR-138 expression. Afterwards, cell apoptosis was analyzed using flow cytometry. The expression patterns of cartilage catabolism-related factors (MMP-13, ADAMTS-4, and ADAMTS-5) were determined using RT-qPCR and western blot analyses. The EZH2 and H3K27me3 enrichment at the miR-138 promoter region were determined using ChIP-qPCR. Finally, an OA mouse model was constructed to verify the function of EZH2 in vivo. EZH2 was expressed at high levels in OA models. EZH2 depletion ameliorated OA, as evidenced by reduced cell apoptosis in IL-1β-treated chondrocytes and decreased levels of cartilage catabolism-related factors. Moreover, EZH2 promoted histone methylation at the miR-138 promoter to suppress miR-138 expression, thereby upregulating the expression of SDC1, a target gene of miR-138. Changes in this pathway increased the expression of cartilage catabolism-related factors in vitro while promoting cartilage degeneration in vivo. Our data provided evidence that EZH2 inhibits miR-138 expression by promoting the histone methylation of its promoter, which induces cartilage degeneration in OA models by upregulating SDC1 expression, suggesting a novel mechanistic strategy for OA treatment.
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Affiliation(s)
- Jian Wang
- Department of Orthopedics, Zhongshan Hospital Wusong Branch, Fudan University, 200940, Shanghai, PR China
| | - Xiang Wang
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 200011, Shanghai, PR China
| | - Xu Ding
- Department of Orthopedics, Zhongshan Hospital Wusong Branch, Fudan University, 200940, Shanghai, PR China
| | - Tao Huang
- Department of Orthopedics, Zhongshan Hospital Wusong Branch, Fudan University, 200940, Shanghai, PR China
| | - Dengxin Song
- Department of Orthopedics, Zhongshan Hospital Wusong Branch, Fudan University, 200940, Shanghai, PR China
| | - Hairong Tao
- Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 200011, Shanghai, PR China.
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15
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Zhang M, Cheng K. Long non-coding RNA KCNQ1OT1 promotes hydrogen peroxide-induced lens epithelial cell apoptosis and oxidative stress by regulating miR-223-3p/BCL2L2 axis. Exp Eye Res 2021; 206:108543. [PMID: 33744257 DOI: 10.1016/j.exer.2021.108543] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 03/02/2021] [Accepted: 03/10/2021] [Indexed: 12/24/2022]
Abstract
Many long non-coding RNAs (lncRNAs) can exert crucial roles in the pathogenesis of cataract, including lncRNA KCNQ1 opposite strand/antisense transcript 1 (KCNQ1OT1). We aimed to further elucidate the biological role and regulatory molecular mechanism of KCNQ1OT1 in cataract. The expression of KCNQ1OT1 and miR-223-3p and BCL2 like 2 (BCL2L2) was examined by qRT-PCR. Cataract cell model was constructed by treatment with hydrogen peroxide (H2O2) in lens epithelial cells (SRA01/04). SRA01/04 cell viability and cell apoptosis were tested using CCK-8 assay and flow cytometry, respectively. Western blot (WB) was performed to measure the levels of apoptosis-related proteins and BCL2L2 protein. The oxidative stress factors were analyzed by corresponding kits. The interaction between miR-223-3p and KCNQ1OT1 or BCL2L2 was validated by dual-luciferase reporter and RNA Immunoprecipitation (RIP) assays. We found that KCNQ1OT1 was upregulated in cataract anterior lens capsule samples and H2O2-induced SRA01/04 cells. Knockdown of KCNQ1OT1 suppressed H2O2-induced SRA01/04 cell apoptosis and oxidative stress. KCNQ1OT1 acted as a sponge of miR-223-3p. Inhibition of miR-223-3p could abate the function of KCNQ1OT1 silence in H2O2-treated SRA01/04 cells. Additionally, BCL2L2 was a direct target of miR-223-3p, and miR-223-3p weakened H2O2-induced SRA01/04 cell apoptosis and oxidative stress by targeting BCL2L2. Collectively, the data suggest a role for the KCNQ1OT1/miR-223-3p/BCL2L2 axis in cataract formation but the data was generated using an epithelial cell line.
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Affiliation(s)
- Min Zhang
- Department of Ophthalmology, Jinan Maternal and Child Health Hospital, Jinan, 250001, Shandong, China
| | - Kai Cheng
- Department of Ophthalmology, Jinan Maternal and Child Health Hospital, Jinan, 250001, Shandong, China.
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16
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Evolving targets for anti-epileptic drug discovery. Eur J Pharmacol 2020; 887:173582. [DOI: 10.1016/j.ejphar.2020.173582] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 09/14/2020] [Accepted: 09/15/2020] [Indexed: 12/27/2022]
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17
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KCNQ1OT1/miR-18b/HMGA2 axis regulates high glucose-induced proliferation, oxidative stress, and extracellular matrix accumulation in mesangial cells. Mol Cell Biochem 2020; 476:321-331. [PMID: 32989627 DOI: 10.1007/s11010-020-03909-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 09/07/2020] [Indexed: 12/20/2022]
Abstract
The dysregulated long noncoding RNAs (lncRNAs) are associated with the pathogenesis of diabetic nephropathy (DN). LncRNA potassium voltage-gated channel subfamily Q member 1 overlapping transcript 1 (KCNQ1OT1) plays an important role in diabetes, but the role and mechanism of KCNQ1OT1 in DN are largely unknown. Serum samples were collected from 30 DN patients and normal volunteers. High glucose (HG)-challenged human mesangial cells (HMCs) were used as a cell model of DN. KCNQ1OT1, microRNA-18b (miR-18b), and high mobility group protein A2 (HMGA2) abundances were examined via quantitative reverse transcription polymerase chain reaction or western blot. Cell proliferation was assessed via 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide. Oxidative stress was assessed via the levels of reactive oxygen species (ROS), malondialdehyde (MDA), superoxide dismutase (SOD), and SOD2. Extracellular matrix (ECM) accumulation was investigated by the levels of fibronectin (FN), collagen I (Col I), and Col IV. The relationship between miR-18b and KCNQ1OT1 or HMGA2 was determined via dual-luciferase reporter analysis, RNA immunoprecipitation, and pull-down. KCNQ1OT1 expression was increased and miR-18b expression was decreased in DN patients and HG-challenged HMCs. miR-18b was targeted via KCNQ1OT1. Knockdown of KCNQ1OT1 weakened HG-caused proliferation, oxidative stress, and ECM accumulation of HMCs by increasing miR-18b. HMGA2 was targeted via miR-18b. miR-18b alleviated HG-induced cell proliferation, oxidative stress, and ECM accumulation by decreasing HMGA2. Silence of KCNQ1OT1 reduced HMGA2 expression via miR-18b. KCNQ1OT1 knockdown attenuated HG-induced proliferation, oxidative stress, and ECM accumulation of HMCs by regulating miR-18b/HMGA2 axis.
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