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Huang X, Pan M, Du P, Chen Y, Zhang C, Lu W, Lin J. Maternally expressed 3 protects the intestinal barrier from cardiac arrest-induced ischemia/reperfusion injury via miR-34a-3p/sirtuin 1/nuclear factor kappa B signaling. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:122. [PMID: 33569424 PMCID: PMC7867908 DOI: 10.21037/atm-20-6438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 12/26/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND Cardiac arrest (CA), a common disease with a high mortality rate, is a leading cause of ischemia/reperfusion (I/R)-induced dysfunction of the intestinal barrier. Long non-coding RNAs (lncRNAs) play crucial roles in multiple pathological processes. However, the effect of the lncRNA maternally expressed 3 (MEG3) on intestinal I/R injury and the intestinal barrier has not been fully determined. Therefore, this study aimed to investigate the function of MEG3 in CA-induced intestinal barrier dysfunction. METHODS The oxygen and glucose deprivation (OGD) model in the human colorectal adenocarcinoma Caco-2 cells and in vivo cardiac arrest-induced intestinal barrier dysfunction model in Sprague-Dawley (SD) rats were established. The effect and underlying mechanism of MEG3 on the intestinal barrier from cardiac arrest-induced ischemia/reperfusion injury were analyzed by methyl thiazolyl tetrazolium (MTT) assays, Annexin V-FITC/PI apoptosis detection kit, Terminal deoxynucleotidyl transferase-mediated dUTP nick end labelling (TUNEL) staining, quantitative polymerase chain reaction (qPCR) assays, Western blot analysis, luciferase reporter gene assays, transepithelial electrical resistance (TEER) measurements, immunofluorescence analysis, and enzyme-linked immunosorbent assay (ELISA) assays. RESULTS Interestingly, we found that MEG3 could protect Caco-2 cells from oxygen-glucose deprivation (OGD)/reoxygenation-induced I/R injury by modulating cell proliferation and apoptosis. Moreover, MEG3 relieved OGD-induced intestinal barrier dysfunction in vitro, as demonstrated by its significant rescue effect on transepithelial electrical resistance and the expression of tight junction proteins such as occludin and claudin-1 (CLDN1), which were impaired in OGD-treated Caco-2 cells. Mechanistically, MEG3 inhibited the expression of inflammatory factors including interleukin (IL)-1β, tumor necrosis factor (TNF)-α, interferon-gamma (IFN)-γ, inflammatory factors including interleukin (IL)-10, and transforming growth factor beta (TGFb)-1, as well as nuclear factor-kappa B (NF-κB) signaling. In response to OGD treatment in vitro, MEG3 also activated the expression of sirtuin 1 (SIRT1) by Caco-2 cells via sponging miR-34a-3p. Furthermore, MEG3 relieved CA-induced intestinal barrier dysfunction through NF-κB signaling in vivo. CONCLUSIONS LncRNA MEG3 can protect the intestinal barrier from cardiac arrest-induced I/R injury via miR-34a-3p/SIRT1/NF-κB signaling. This finding provides new insight into the mechanism by which MEG3 restores intestinal barrier function following I/R injury, presenting it as a potential therapeutic candidate or strategy in intestinal injury.
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Affiliation(s)
- Xianwei Huang
- Emergency Department, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Mandong Pan
- Emergency Department, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Penghui Du
- Emergency Department, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Yinrong Chen
- Emergency Department, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Caixia Zhang
- Emergency Department, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Wang Lu
- Emergency Department, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Jiyan Lin
- Emergency Department, The First Affiliated Hospital of Xiamen University, Xiamen, China
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Li W, Xiao H. Dihydromyricetin Alleviates High Glucose-Induced Oxidative Stress and Apoptosis in Human Retinal Pigment Epithelial Cells by Downregulating miR-34a Expression. Diabetes Metab Syndr Obes 2021; 14:387-397. [PMID: 33536772 PMCID: PMC7850407 DOI: 10.2147/dmso.s290633] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 12/12/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Diabetic retinopathy (DR) is one of the most common microvascular complications of diabetes mellitus, which leads to neuronal and vascular dysfunction in the retina with a final outcome of complete loss of vision. The aim of the present study was to investigate the effects of dihydromyricetin (DHM), a natural flavanol compound, on diabetic retinopathy (DR) and identify its potential mechanisms. METHODS Retinal pigment epithelial cell line (ARPE-19) treated with high glucose (HG) was used to simulate the DR model in vitro. After treatment with different concentrations of DHM, the cell viability, production of reactive oxygen species (ROS) and the levels of oxidative stress-related markers in the in vitro model were detected using corresponding kits. Cell apoptosis was determined using terminal-deoxynucleotidyl transferase mediated nick end labeling (TUNEL) staining, and the expression of apoptotic proteins was examined using Western blot analysis. Subsequently, microRNA (miR)-34a expression was measured by reverse transcription-quantitative PCR (RT-qPCR). The levels of oxidative stress and apoptosis were evaluated after miR-34a overexpression. RESULTS Results indicated that DHM dose-dependently elevated the decreased cell viability induced by HG. Moreover, the content of ROS was significantly reduced in HG-stimulated ARPE-19 cells, accompanied by enhanced activities of superoxide dismutase (SOD) and catalase (CAT) antioxidases, as well as concentration of glutathione (GSH). Furthermore, remarkably decreased apoptosis of ARPE-19 cells induced by HG was observed following DHM intervention. Importantly, HG stimulation notably upregulated miR-34a expression, which was reversed by DHM treatment. Importantly, the inhibitory effects of DHM on HG-induced oxidative stress and apoptosis of ARPE-19 cells were restored following miR-34a overexpression. CONCLUSION Taken together, this work demonstrated that DHM exerts protective effects on HG-induced oxidative stress and apoptotic damage in ARPE-19 cells via inhibition of miR-34a expression, providing a promising therapeutic agent for the treatment of DR.
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Affiliation(s)
- Wenjun Li
- Department of Ophthalmology, NHC Key Laboratory of Hormones and Development, Tianjin Key Laboratory of Metabolic Diseases, Chu Hsien-I Memorial Hospital & Tianjin Institute of Endocrinology, Tianjin Medical University, Tianjin300134, People’s Republic of China
| | - Hongxia Xiao
- Department of Ophthalmology, Jingmen No. 2 People’s Hospital, Jingmen448000, People’s Republic of China
- Correspondence: Hongxia Xiao Jingmen No. 2 People’s Hospital, 39 Xiangshan Avenue, Jingmen, Hubei448000, People’s Republic of China Email
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53
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Huang L, Hu X. Molecular Mechanisms and Functions of lncRNAs in the Inflammatory Reaction of Diabetes Mellitus. Int J Endocrinol 2021; 2021:2550399. [PMID: 34712322 PMCID: PMC8548175 DOI: 10.1155/2021/2550399] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 10/08/2021] [Indexed: 12/28/2022] Open
Abstract
Diabetes is a chronic inflammatory state, and several studies have shown that the mechanisms of insulin resistance and abnormal islet β-cell function in diabetes are closely related to inflammatory reactions. Inflammation plays a critical role in diabetic complications. Long noncoding RNAs (lncRNAs), a new area of genomic research for gene regulation, have complex biological functions in various aspects of cellular biological activity. Recent studies have shown that lncRNAs are associated with the regulation of inflammatory responses in various ways, including at the epigenetic, transcriptional, and posttranscriptional levels. This paper presents a brief review of studies on the mechanisms of lncRNAs in diabetic inflammation. The purpose of this article is to determine the role of lncRNAs in the process of diabetic inflammation and to provide new strategies for the use of lncRNAs in the treatments for diabetic inflammation.
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Affiliation(s)
- Linjuan Huang
- Department of Endocrinology, The First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
| | - Xiaolei Hu
- Department of Endocrinology, The First Affiliated Hospital of Bengbu Medical College, Bengbu 233000, China
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Kang Q, Yang C. Oxidative stress and diabetic retinopathy: Molecular mechanisms, pathogenetic role and therapeutic implications. Redox Biol 2020; 37:101799. [PMID: 33248932 PMCID: PMC7767789 DOI: 10.1016/j.redox.2020.101799] [Citation(s) in RCA: 392] [Impact Index Per Article: 98.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 10/29/2020] [Accepted: 11/10/2020] [Indexed: 12/18/2022] Open
Abstract
Oxidative stress, a cytopathic outcome of excessive generation of ROS and the repression of antioxidant defense system for ROS elimination, is involved in the pathogenesis of multiple diseases, including diabetes and its complications. Retinopathy, a microvascular complication of diabetes, is the primary cause of acquired blindness in diabetic patients. Oxidative stress has been verified as one critical contributor to the pathogenesis of diabetic retinopathy. Oxidative stress can both contribute to and result from the metabolic abnormalities induced by hyperglycemia, mainly including the increased flux of the polyol pathway and hexosamine pathway, the hyper-activation of protein kinase C (PKC) isoforms, and the accumulation of advanced glycation end products (AGEs). Moreover, the repression of the antioxidant defense system by hyperglycemia-mediated epigenetic modification also leads to the imbalance between the scavenging and production of ROS. Excessive accumulation of ROS induces mitochondrial damage, cellular apoptosis, inflammation, lipid peroxidation, and structural and functional alterations in retina. Therefore, it is important to understand and elucidate the oxidative stress-related mechanisms underlying the progress of diabetic retinopathy. In addition, the abnormalities correlated with oxidative stress provide multiple potential therapeutic targets to develop safe and effective treatments for diabetic retinopathy. Here, we also summarized the main antioxidant therapeutic strategies to control this disease. Oxidative stress can both contribute to and result from hyperglycemia-induced metabolic abnormalities in retina. Genes important in regulation of ROS are epigenetically modified, increasing ROS accumulation in retina. Oxidative stress is closely associated with the pathological changes in the progress of diabetic retinopathy. Antioxidants ameliorate retinopathy through targeting multiple steps of oxidative stress.
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Affiliation(s)
- Qingzheng Kang
- Institute for Advanced Study, Shenzhen University, Nanshan District, Shenzhen, 518060, China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Chunxue Yang
- Department of Pathology, The University of Hong Kong, Hong Kong SAR, 999077, China.
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Ji Q, Han J, Wang L, Liu J, Dong Y, Zhu K, Shi L. MicroRNA-34a promotes apoptosis of retinal vascular endothelial cells by targeting SIRT1 in rats with diabetic retinopathy. Cell Cycle 2020; 19:2886-2896. [PMID: 33064974 DOI: 10.1080/15384101.2020.1827509] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
MiR-34a is associated with diabetic retinopathy (DR). This article aims to demystify the role of miR-34a in DR. We established a DR model by streptozocin injection. Rat retinal vascular endothelial cells (RVECs) were treated with high glucose (HG) to induce DR. The pathological changes of retinal tissues and blood-retinal vascular barrier permeability of DR rats were assessed by HE staining and Evans-Blue leak test. The expression of gene and protein was evaluated by quantitative real-time PCR or western blot. MTT assay and flow cytometry were performed to detect proliferation and apoptosis. The relationship between miR-34a and SIRT1 was evaluated using luciferase reporter assay. MiR-34a was up-regulated and SIRT1 was down-regulated in retinal tissues of DR rats and HG-induced RVECs. MiR-34a silencing improved DR by regulating apoptosis and VEGF expression in DR rats. Furthermore, miR-34a interacted with SIRT1 and suppressed SIRT1 expression. MiR-34a overexpression inhibited proliferation and promoted apoptosis of RVECs, which was effectively abolished by SIRT1 up-regulation. In summary, our data demonstrate that miR-34a promotes apoptosis of RVECs by targeting SIRT1 in DR rats. Our findings suggest that miR-34a/SIRT1 axis could be a valuable target for DR therapies.
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Affiliation(s)
- Qingshan Ji
- Department of Ophthalmology, Affiliated First Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China , Hefei, Anhui, China
| | - Jing Han
- Department of Ophthalmology, Affiliated First Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China , Hefei, Anhui, China
| | - Lisong Wang
- Department of Ophthalmology, Affiliated First Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China , Hefei, Anhui, China
| | - Jiajia Liu
- Department of Ophthalmology, Affiliated First Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China , Hefei, Anhui, China
| | - Yiran Dong
- Department of Ophthalmology, Affiliated First Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China , Hefei, Anhui, China
| | - Kai Zhu
- Department of Ophthalmology, Affiliated First Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China , Hefei, Anhui, China
| | - Lei Shi
- Department of Ophthalmology, Affiliated First Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China , Hefei, Anhui, China
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Luo R, Li L, Hu Y, Xiao F. LncRNA H19
inhibits high glucose‐induced inflammatory responses of human retinal epithelial cells by targeting
miR
‐19b to increase
SIRT1
expression. Kaohsiung J Med Sci 2020; 37:101-110. [PMID: 33022863 DOI: 10.1002/kjm2.12302] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 07/17/2020] [Accepted: 08/30/2020] [Indexed: 12/12/2022] Open
Affiliation(s)
- Rong Luo
- Department of Ophthalmology Jiangxi Provincial People's Hospital Affiliated to Nanchang University Nanchang China
| | - Lan Li
- Department of Ophthalmology Jiangxi Provincial People's Hospital Affiliated to Nanchang University Nanchang China
| | - Yu‐Xiang Hu
- Department of Ophthalmology Jiangxi Provincial People's Hospital Affiliated to Nanchang University Nanchang China
| | - Fan Xiao
- Department of Ophthalmology Jiangxi Provincial People's Hospital Affiliated to Nanchang University Nanchang China
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Xu YT, Leng YR, Liu MM, Dong RF, Bian J, Yuan LL, Zhang JG, Xia YZ, Kong LY. MicroRNA and long noncoding RNA involvement in gout and prospects for treatment. Int Immunopharmacol 2020; 87:106842. [DOI: 10.1016/j.intimp.2020.106842] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/19/2020] [Accepted: 07/23/2020] [Indexed: 02/08/2023]
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Włodarski A, Strycharz J, Wróblewski A, Kasznicki J, Drzewoski J, Śliwińska A. The Role of microRNAs in Metabolic Syndrome-Related Oxidative Stress. Int J Mol Sci 2020; 21:ijms21186902. [PMID: 32962281 PMCID: PMC7555602 DOI: 10.3390/ijms21186902] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 09/15/2020] [Accepted: 09/17/2020] [Indexed: 02/06/2023] Open
Abstract
Oxidative stress (OxS) is the cause and the consequence of metabolic syndrome (MetS), the incidence and economic burden of which is increasing each year. OxS triggers the dysregulation of signaling pathways associated with metabolism and epigenetics, including microRNAs, which are biomarkers of metabolic disorders. In this review, we aimed to summarize the current knowledge regarding the interplay between microRNAs and OxS in MetS and its components. We searched PubMed and Google Scholar to summarize the most relevant studies. Collected data suggested that different sources of OxS (e.g., hyperglycemia, insulin resistance (IR), hyperlipidemia, obesity, proinflammatory cytokines) change the expression of numerous microRNAs in organs involved in the regulation of glucose and lipid metabolism and endothelium. Dysregulated microRNAs either directly or indirectly affect the expression and/or activity of molecules of antioxidative signaling pathways (SIRT1, FOXOs, Keap1/Nrf2) along with effector enzymes (e.g., GPx-1, SOD1/2, HO-1), ROS producers (e.g., NOX4/5), as well as genes of numerous signaling pathways connected with inflammation, insulin sensitivity, and lipid metabolism, thus promoting the progression of metabolic imbalance. MicroRNAs appear to be important epigenetic modifiers in managing the delicate redox balance, mediating either pro- or antioxidant biological impacts. Summarizing, microRNAs may be promising therapeutic targets in ameliorating the repercussions of OxS in MetS.
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Affiliation(s)
- Adam Włodarski
- Department of Internal Diseases, Diabetology and Clinical Pharmacology, Medical University of Lodz, 92-213 Lodz, Poland;
- Correspondence: (A.W.); (J.S.); (A.Ś.)
| | - Justyna Strycharz
- Department of Medical Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland;
- Correspondence: (A.W.); (J.S.); (A.Ś.)
| | - Adam Wróblewski
- Department of Medical Biochemistry, Medical University of Lodz, 92-215 Lodz, Poland;
| | - Jacek Kasznicki
- Department of Internal Diseases, Diabetology and Clinical Pharmacology, Medical University of Lodz, 92-213 Lodz, Poland;
| | - Józef Drzewoski
- Central Teaching Hospital of the Medical University of Lodz, 92-213 Lodz, Poland;
| | - Agnieszka Śliwińska
- Department of Nucleic Acid Biochemistry, Medical University of Lodz, 92-213 Lodz, Poland
- Correspondence: (A.W.); (J.S.); (A.Ś.)
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Xiao F, Li L, Fu JS, Hu YX, Luo R. Regulation of the miR-19b-mediated SOCS6-JAK2/STAT3 pathway by lncRNA MEG3 is involved in high glucose-induced apoptosis in hRMECs. Biosci Rep 2020; 40:BSR20194370. [PMID: 32519748 PMCID: PMC7327180 DOI: 10.1042/bsr20194370] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 06/03/2020] [Accepted: 06/04/2020] [Indexed: 12/19/2022] Open
Abstract
OBJECTIVE Diabetic retinopathy (DR) is one of the most severe and common complications of diabetes mellitus. The present study aimed to investigate the molecular mechanism of MEG3, miR-19b and SOCS6 in human retinal microvascular endothelial cells (hRMECs) under high glucose conditions. METHODS HRMECs were cultured in 5 or 30 mM D-glucose medium. qRT-PCR and Western blotting were used to determine the mRNA expression and protein levels. MTT assay and flow cytometry analysis were performed to detect the viability and apoptosis of hRMECs, respectively. TNF-α, IL-6 and IL-1β levels in cell supernatants were detected by ELISA. The activity of caspase-3/7 was also determined. A luciferase reporter assay was performed to confirm the targeting relationship between miR-19b and SOCS6, as well as MEG3 and miR-19b. RESULTS Our study demonstrated that miR-19b was increased and SOCS6 was decreased in HG-induced hRMECs. Knockdown of SOCS6 inhibited cell viability and reversed the promotion of cell viability induced by knockdown of miR-19b. Additionally, miR-19b directly targeted and negatively regulated SOCS6. Moreover, miR-19b promoted the cell apoptosis rate and caspase-3/7 activity and increased inflammatory factors through the SOCS6-mediated JAK2/STAT3 signalling pathway. In addition, MEG3 attenuated HG-induced apoptosis of hRMECs by targeting the miR-19b/SOCS6 axis. CONCLUSION These findings indicate that MEG3 inhibited HG-induced apoptosis and inflammation by regulating the miR-19b/SOCS6 axis through the JAK2/STAT3 signalling pathway in hRMECs. Thus, these findings might provide a new target for the treatment of DR.
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Affiliation(s)
- Fan Xiao
- Department of Ophthalmology, Jiangxi Provincial People’s Hospital Affiliated to Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Lan Li
- Department of Ophthalmology, Jiangxi Provincial People’s Hospital Affiliated to Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Jing-Song Fu
- Department of Ophthalmology, Jiangxi Provincial People’s Hospital Affiliated to Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Yu-Xiang Hu
- Department of Ophthalmology, Jiangxi Provincial People’s Hospital Affiliated to Nanchang University, Nanchang 330006, Jiangxi Province, China
| | - Rong Luo
- Department of Ophthalmology, Jiangxi Provincial People’s Hospital Affiliated to Nanchang University, Nanchang 330006, Jiangxi Province, China
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Cao NJ, Liu HN, Dong F, Wang W, Sun W, Wang G. Integrative analysis of competitive endogenous RNA network reveals the regulatory role of non-coding RNAs in high-glucose-induced human retinal endothelial cells. PeerJ 2020; 8:e9452. [PMID: 32655995 PMCID: PMC7331629 DOI: 10.7717/peerj.9452] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 06/09/2020] [Indexed: 12/12/2022] Open
Abstract
Background Increasing evidence has suggested that non-coding RNAs (ncRNAs) play critical roles in the pathogenesis of diabetic retinopathy (DR), but their underlying mechanisms remain unclear. The purpose of this study was to determine latent key genes and to structure a competing endogenous RNA (ceRNA) regulatory network to discover the potential molecular mechanisms governing the effects of high glucose on human retinal endothelial cells (HRECs). Methods We obtained microarray data for long non-coding RNA (lncRNA) and mRNA of high-glucose-induced HREC samples from NCBI GEO datasets. The ceRNA network was screened using intersecting prediction results from miRcode, TargetScan, miRTarBase and miRDB. The protein–protein interaction (PPI) network was constructed using the Search Tool for the Retrieval of Interacting Genes and hub genes were obtained using the cytoHubba app. The ClusterProfiler package was applied for performing Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis. The expression of key RNAs was verified using the qRT-PCR method. A key ceRNA subnetwork was constructed based on the criticality of the genes and its binding sites were verified by luciferase reporter assay. The viability and apoptosis of HRECs were tested using the transfection of the miR-449c inhibitor. Results A total of 3,328 lncRNAs and 2,017 mRNAs were screened for differentially expressed (DE) profiles. The newly constructed ceRNA network was composed of 410 lncRNAs, 35 miRNAs and 122 mRNAs. The 10 hub genes were identified through the PPI network. GO and KEGG analysis revealed that DE mRNAs were mainly related to the positive regulation of the mRNA catabolic process, cell polarity, and the G1/S transition of mitotic and cell cycle signaling pathways. QRT-PCR was used to verify RNAs and the most important genes were screened out. A key ceRNA subnetwork OIP5-AS1/miR-449c/MYC was established. The binding site was verified by luciferase reporter assay. The expression levels of OIP5-AS1 and MYC increased after miR-449c inhibitor transfection, miR-449c decreased, HRECs activity increased, and apoptosis decreased, compared with the control group. Conclusion We successfully built the key ceRNA subnetwork, OIP5-AS1/miR-449c/MYC, by applying the GEO database for data analysis and mining. The results from the ceRNA network allow us to better understand the effect of ncRNAs on HRECs under hyperglycemic conditions and the pathogenesis of DR.
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Affiliation(s)
- Nan-Jue Cao
- Department of Ophthalmology, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, Zhejiang, Peoples R China
| | - He-Nan Liu
- Department of Ophthalmology, Shengjing Hospital, China Medical University, Shenyang, Liaoning, Peoples R China
| | - Feng Dong
- Department of Ophthalmology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, Peoples R China
| | - Wei Wang
- School and Hospital of Stomatology, China Medical University, Liaoning Provincial Key Laboratory of Oral Diseases, Shenyang, Liaoning, Peoples R China
| | - Wei Sun
- Department of Radiology, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, Zhejiang, Peoples R China
| | - Gang Wang
- Department of Rheumatology, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, Zhejiang, Peoples R China
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Dong Y, Feng S, Dong F. Maternally-Expressed Gene 3 (MEG3)/miR-143-3p Regulates Injury to Periodontal Ligament Cells by Mediating the AKT/Inhibitory κB Kinase (IKK) Pathway. Med Sci Monit 2020; 26:e922486. [PMID: 32520926 PMCID: PMC7301678 DOI: 10.12659/msm.922486] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background Dysregulated long noncoding RNAs (lncRNAs) are implicated in periodontitis development. Nevertheless, the role and mechanism of lncRNA maternally-expressed gene 3 (MEG3) in periodontitis progression remain unclear. This study aimed to explore how and whether MEG3 affect viability, apoptosis, and inflammatory response in lipopolysaccharide (LPS)-treated periodontal ligament cells (PDLCs). Material/Methods Periodontal ligament tissues were collected from periodontitis patients or normal individuals. PDLCs were obtained from normal periodontal ligament and treated with lipopolysaccharide (LPS). LPS-induced PDLCs injury was assessed via viability, apoptosis and inflammatory response using Cell Counting Kit-8, flow cytometry, quantitative reverse transcription polymerase chain reaction, enzyme-linked immunosorbent assay, and Western blot. The levels of MEG3 and microRNA (miR)-143-3p were examined via quantitative reverse transcription polymerase chain reaction. The protein kinase B(AKT)/inhibitory κB kinase (IKK) pathway was analyzed via Western blot. The target correlation of MEG3 and miR-143-3p was determined through dual-luciferase reporter analysis. Results MEG3 level was decreased and miR-143-3p level was upregulated in periodontitis and LPS-treated PDLCs. MEG3 overexpression or miR-143-3p knockdown alleviated LPS-induced viability inhibition, apoptosis promotion, and inflammatory response. MEG3 was a sponge for miR-143-3p. miR-143-3p overexpression weakened the effect of MEG3 on LPS-induced injury. MEG3 overexpression inhibited the activation of AKT/IKK pathway by sponging miR-143-3p in LPS-treated PDLCs. Conclusions MEG3 overexpression inhibited LPS-induced injury in PDLCs by inactivating the AKT/IKK pathway via sponging miR-143-3p, providing a potential target for treatment of periodontitis.
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Affiliation(s)
- Yao Dong
- Department of Stomatology, HwaMei Hospital, University of Chinese Academy of Science, Ningbo, Zhejiang, China (mainland)
| | - Shuairu Feng
- Department of Stomatology, HwaMei Hospital, University of Chinese Academy of Science, Ningbo, Zhejiang, China (mainland)
| | - Feijun Dong
- Department of Stomatology, HwaMei Hospital, University of Chinese Academy of Science, Ningbo, Zhejiang, China (mainland)
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Zou J, Liu KC, Wang WP, Xu Y. Circular RNA COL1A2 promotes angiogenesis via regulating miR-29b/VEGF axis in diabetic retinopathy. Life Sci 2020; 256:117888. [PMID: 32497630 DOI: 10.1016/j.lfs.2020.117888] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 05/25/2020] [Accepted: 05/29/2020] [Indexed: 12/16/2022]
Abstract
AIMS The dysregulation of circular RNAs (circRNAs) has been implicated in the progression of diabetic retinopathy (DR). This study aims to explore the role and underlying mechanism of hsa_circ_0081108 (circCOL1A2) in DR. MATERIALS AND METHODS circCOL1A2, vascular endothelial growth factor (VEGF) and miR-29b expression levels in human retinal microvascular endothelial cells (hRMECs) were detected by quantitative reverse transcription polymerase chain reaction (RT-qPCR) and Western blotting. The biological functions of hRMECs were evaluated by MTT, transwell, tube formation, and vascular permeability assays, respectively. The interaction between miR-29b and circCOL1A2/VEGF was determined by dual luciferase assay. The release of VEGF was examined by ELISA. The in vivo role of circCOL1A2 was further verified in streptozotocin (STZ)-induced DR in mice. The pathological changes and VEGF expression in retinal tissues were detected by hematoxylin and eosin (HE) and immunohistochemical staining. KEY FINDINGS High glucose (HG) challenge led to increased circCOL1A2, VEGF, MMP-2, MMP-9 levels, but decreased miR-29b level in hRMECs. In addition, circCOL1A2 sponged miR-29b to promote VEGF expression. Silencing of circCOL1A2 inhibited HG-induced proliferation, migration, angiogenesis and vascular permeability of hRMECs via enhancing miR-29b expression. Moreover, circCOL1A2/miR-29b axis participated in HG-induced increase in angiogenesis-related protein expression. Finally, circCOL1A2 knockdown suppressed angiogenesis via regulating miR-29b/VEGF axis in DR mice. SIGNIFICANCE circCOL1A2 facilities angiogenesis during the pathological progression of DR via regulating miR-29b/VEGF axis, suggesting that targeting circCOL1A2 may be a potential treatment for DR.
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Affiliation(s)
- Jing Zou
- Eye Center of Xiangya Hospital, Central South University, Changsha 410008, Hunan Province, PR China; Hunan Key Laboratory of Ophthalmology, Changsha 410008, Hunan Province, PR China
| | - Kang-Cheng Liu
- Eye Center of Xiangya Hospital, Central South University, Changsha 410008, Hunan Province, PR China; Hunan Key Laboratory of Ophthalmology, Changsha 410008, Hunan Province, PR China
| | - Wan-Peng Wang
- Eye Center of Xiangya Hospital, Central South University, Changsha 410008, Hunan Province, PR China; Hunan Key Laboratory of Ophthalmology, Changsha 410008, Hunan Province, PR China
| | - Yi Xu
- Eye Center of Xiangya Hospital, Central South University, Changsha 410008, Hunan Province, PR China; Hunan Key Laboratory of Ophthalmology, Changsha 410008, Hunan Province, PR China.
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Tu Y, Zhu M, Wang Z, Wang K, Chen L, Liu W, Shi Q, Zhao Q, Sun Y, Wang X, Song E, Liu X. Melatonin inhibits Müller cell activation and pro-inflammatory cytokine production via upregulating the MEG3/miR-204/Sirt1 axis in experimental diabetic retinopathy. J Cell Physiol 2020; 235:8724-8735. [PMID: 32324260 DOI: 10.1002/jcp.29716] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Revised: 03/17/2020] [Accepted: 04/02/2020] [Indexed: 12/15/2022]
Abstract
Diabetic retinopathy (DR) is the most common ocular complication caused by diabetes mellitus and is the main cause of visual impairment in working-age people. Reactive gliosis and pro-inflammatory cytokine production by Müller cells contribute to the progression of DR. Melatonin is a strong anti-inflammatory hormone, mediating the cytoprotective effect of a variety of retinal cells against hyperglycemia. In this study, melatonin inhibited the gliosis activation and inflammatory cytokine production of Müller cells in both in vitro and in vivo models of DR. The melatonin membrane blocker, Luzindole, invalidated the melatonin-mediated protective effect on Müller cells. Furthermore, melatonin inhibited Müller cell activation and pro-inflammatory cytokine production by upregulating the long noncoding RNA maternally expressed gene 3/miR-204/sirtuin 1 axis. In conclusion, our study suggested that melatonin treatment could be a novel therapeutic strategy for DR.
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Affiliation(s)
- Yuanyuan Tu
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Manhui Zhu
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, Jiangsu, China.,Department of Pathogen Biology, Medical College, Nantong University, Nantong, Jiangsu, China
| | - Zhenzhen Wang
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Kun Wang
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Lili Chen
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Wangrui Liu
- Department of Neurosurgery, Affiliated Hospital of Youjiang Medical College for Nationalities, Guangxi, China
| | - Qin Shi
- Jinqiao Clinic, Shanghai Pudong New Area Public Benefit Hospital, Shanghai, China
| | - Qingliang Zhao
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Yake Sun
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Xiaoyu Wang
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, Jiangsu, China
| | - E Song
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Xiaojuan Liu
- Department of Pathogen Biology, Medical College, Nantong University, Nantong, Jiangsu, China
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He M, Wang W, Yu H, Wang D, Cao D, Zeng Y, Wu Q, Zhong P, Cheng Z, Hu Y, Zhang L. Comparison of expression profiling of circular RNAs in vitreous humour between diabetic retinopathy and non-diabetes mellitus patients. Acta Diabetol 2020; 57:479-489. [PMID: 31749049 DOI: 10.1007/s00592-019-01448-w] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 10/30/2019] [Indexed: 02/06/2023]
Abstract
AIMS To compare circular (circRNA) expression levels in the vitreous humour between PDR (proliferative diabetic retinopathy) and the control groups. METHODS The present study collected vitreous humour samples of both the PDR group and the control group (composed of rhegmatogenous retinal detachment, idiopathic macular hole and idiopathic macular epiretinal membrane). All the samples were subjected to circRNA and mRNA sequencing as well as bioinformatic analysis. RESULTS The vitreous humour of the PDR and control groups was collected during PPV surgery. Compared to the control group, 122 upregulated and 9 downregulated circRNAs, and 818 upregulated mRNAs and 864 downregulated mRNAs were identified. We further selected 12 circRNAs to validate the RNA expression level by qPCR; results showed that with the exception of 2 downregulated circRNAs the remaining were significantly upregulated in the PDR group, which was consistent with RNA sequencing results. Bioinformatic analysis was conducted to predict possible miRNAs absorbed by circRNAs. Each circRNA could interact with at least five miRNAs. We randomly chose three miRNAs to test the expression level in the vitreous humour by qPCR and found these miRNAs were significantly downregulated in the PDR group. CONCLUSIONS The changed profiling of circRNAs in the vitreous humour was reliable and may become a promising biomarker of DR and the circRNA-miRNA-mRNA network. It may also play an important role in the progression of DR.
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Affiliation(s)
- Miao He
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China
| | - Wei Wang
- Zhongshan Ophthalmic Center, State Key Laboratory of Ophthalmology, Sun Yat-Sen University, Guangzhou, China
| | - Honghua Yu
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China
| | - Decai Wang
- Zhongshan Ophthalmic Center, State Key Laboratory of Ophthalmology, Sun Yat-Sen University, Guangzhou, China
| | - Dan Cao
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China
| | - Yunkao Zeng
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China
- Shantou University Medical College, Shantou, China
| | - Qiaowei Wu
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China
- Southern Medical University, Guangzhou, China
| | - Pingting Zhong
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China
- Shantou University Medical College, Shantou, China
| | - Zhixing Cheng
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China
| | - Yunyan Hu
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China
| | - Liang Zhang
- Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China.
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Ge Y, Zhang R, Feng Y, Li H. Mbd2 Mediates Retinal Cell Apoptosis by Targeting the lncRNA Mbd2-AL1/miR-188-3p/Traf3 Axis in Ischemia/Reperfusion Injury. MOLECULAR THERAPY-NUCLEIC ACIDS 2020; 19:1250-1265. [PMID: 32074940 PMCID: PMC7025978 DOI: 10.1016/j.omtn.2020.01.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 01/03/2020] [Indexed: 12/19/2022]
Abstract
Recent studies reported that DNA methylation was involved in retinal cell death. Methyl-CpG binding domain protein 2 (Mbd2) is one of the DNA methylation readers. Its role and mechanism of regulation remain unclear. The ischemia/reperfusion (I/R) model in mice primary culture retinal ganglion cells (RGCs) and Mbd2 knockout (Mbd2-KO) mice was used in the current study. We demonstrated that Mbd2 mediates RGC apoptosis caused by I/R injury. Mechanistically, the data suggested that Mbd2 upregulated Mbd2-associated long noncoding RNA 1 (Mbd2-AL1) via demethylation of its promoter. Furthermore, Mbd2-AL1 sponged microRNA (miR)-188-3p, thus preventing tumor necrosis factor (TNF) receptor-associated factor 3 (Traf3) downregulation and inducing RGC apoptosis. This was further demonstrated by the fact that inhibition of miR-188-3p diminished the anti-apoptosis role of Mbd2-AL1 small interfering RNA (siRNA). Finally, it showed that the apoptosis of retinal cells was attenuated, and the visual function was preserved in Mbd2-KO mice, which were associated with the Mbd2-AL1/miR-188-3p/Traf3 axis. Our present study revealed the role of Mbd2 in RGC apoptosis, which may provide a novel therapeutic strategy for retinal ischemic diseases.
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Affiliation(s)
- Yanni Ge
- Department of Ophthalmology in the Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan, China; Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan, China
| | - Ran Zhang
- Department of Ophthalmology in the Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan, China; Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan, China
| | - Yuqing Feng
- Department of Ophthalmology in the Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan, China; Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan, China
| | - Huiling Li
- Department of Ophthalmology in the Second Xiangya Hospital, Central South University, Changsha, 410011 Hunan, China; Hunan Clinical Research Center of Ophthalmic Disease, Changsha, 410011 Hunan, China.
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Magenta A, Lorde R, Syed SB, Capogrossi MC, Puca A, Madeddu P. Molecular therapies delaying cardiovascular aging: disease- or health-oriented approaches. VASCULAR BIOLOGY 2020; 2:R45-R58. [PMID: 32923974 PMCID: PMC7439942 DOI: 10.1530/vb-19-0029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 01/16/2020] [Indexed: 12/11/2022]
Abstract
Regenerative medicine is a new therapeutic modality that aims to mend tissue damage by encouraging the reconstitution of physiological integrity. It represents an advancement over conventional therapies that allow reducing the damage but result in disease chronicization. Age-related decline in spontaneous capacity of repair, especially in organs like the heart that have very limited proliferative capacity, contributes in reducing the benefit of conventional therapy. ncRNAs are emerging as key epigenetic regulators of cardiovascular regeneration. Inhibition or replacement of miRNAs may offer reparative solutions to cardiovascular disease. The first part of this review article is devoted to illustrating novel therapies emerging from research on miRNAs. In the second part, we develop new therapeutic concepts emerging from genetics of longevity. Prolonged survival, as in supercentenarians, denotes an exceptional capacity to repair and cope with risk factors and diseases. These characteristics are shared with offspring, suggesting that the regenerative phenotype is heritable. New evidence indicates that genetic traits responsible for prolongation of health span in humans can be passed to and benefit the outcomes of animal models of cardiovascular disease. Genetic studies have also focused on determinants of accelerated senescence and related druggable targets. Evolutionary genetics assessing the genetic basis of adaptation and comparing successful and unsuccessful genetic changes in response to selection within populations represent a powerful basis to develop novel therapies aiming to prolong cardiovascular and whole organism health.
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Affiliation(s)
| | - Reggio Lorde
- Bristol Medical School (Translational Health Sciences), Bristol Heart Institute, University of Bristol, Bristol, UK
| | - Sunayana Begum Syed
- Laboratory of Cardiovascular Science, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA
| | - Maurizio C Capogrossi
- Laboratory of Cardiovascular Science, National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA.,Division of Cardiology, Johns Hopkins Bayview Medical Center, Baltimore, Maryland, USA
| | - Annibale Puca
- Ageing Unit, IRCCS MultiMedica, Milan, Italy.,Department of Medicine, Surgery and Dentistry, 'Scuola Medica Salernitana' University of Salerno, Baronissi, Italy
| | - Paolo Madeddu
- Bristol Medical School (Translational Health Sciences), Bristol Heart Institute, University of Bristol, Bristol, UK
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Wang(a) J, Wang S, Wang(b) J, Xiao M, Guo Y, Tang Y, Zhang J, Gu J. Epigenetic Regulation Associated With Sirtuin 1 in Complications of Diabetes Mellitus. Front Endocrinol (Lausanne) 2020; 11:598012. [PMID: 33537003 PMCID: PMC7848207 DOI: 10.3389/fendo.2020.598012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Accepted: 11/27/2020] [Indexed: 01/19/2023] Open
Abstract
Diabetes mellitus (DM) has been one of the largest health concerns of the 21st century due to the serious complications associated with the disease. Therefore, it is essential to investigate the pathogenesis of DM and develop novel strategies to reduce the burden of diabetic complications. Sirtuin 1 (SIRT1), a nicotinamide adenosine dinucleotide (NAD+)-dependent deacetylase, has been reported to not only deacetylate histones to modulate chromatin function but also deacetylate numerous transcription factors to regulate the expression of target genes, both positively and negatively. SIRT1 also plays a crucial role in regulating histone and DNA methylation through the recruitment of other nuclear enzymes to the chromatin. Furthermore, SIRT1 has been verified as a direct target of many microRNAs (miRNAs). Recently, numerous studies have explored the key roles of SIRT1 and other related epigenetic mechanisms in diabetic complications. Thus, this review aims to present a summary of the rapidly growing field of epigenetic regulatory mechanisms, as well as the epigenetic influence of SIRT1 on the development and progression of diabetic complications, including cardiomyopathy, nephropathy, and retinopathy.
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Affiliation(s)
- Jie Wang(a)
- School of Nursing, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Shudong Wang
- Department of Cardiology at the First Hospital of Jilin University, Changchun, China
| | - Jie Wang(b)
- School of Nursing, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Mengjie Xiao
- School of Nursing, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yuanfang Guo
- School of Nursing, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yufeng Tang
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, China
| | - Jingjing Zhang
- Department of Cardiology at the First Hospital of China Medical University, and Department of Cardiology at the People’s Hospital of Liaoning Province, Shenyang, China
| | - Junlian Gu
- School of Nursing, Cheeloo College of Medicine, Shandong University, Jinan, China
- *Correspondence: Junlian Gu,
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Song B, Ye L, Wu S, Jing Z. Long non-coding RNA MEG3 regulates CSE-induced apoptosis and inflammation via regulating miR-218 in 16HBE cells. Biochem Biophys Res Commun 2019; 521:368-374. [PMID: 31668807 DOI: 10.1016/j.bbrc.2019.10.135] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 10/18/2019] [Indexed: 12/17/2022]
Abstract
Chronic obstructive pulmonary disease (COPD) is a prevalent disease worldwide, mainly caused by cigarette smoking. Maternally expressed gene 3 (MEG3) functions as the lncRNA and is upregulated in COPD patients and human bronchial epithelial cells after fine particulate matter (PM2.5) treatment. However, the molecular mechanism of MEG3 in COPD remains unknown. The expression of MEG3 and miR-218 in COPD tissues and cigarette smoke extract (CSE)-treated 16HBE cells was detected by RT-qPCR. The effects of MEG3 and miR-218 on proliferation and apoptosis in (CSE)-treated 16HBE cells were analyzed by CCK-8 and flow cytometry assay, respectively. The protein levels of inflammatory cytokines (IL-1β IL-6 and TNF-α) were detected in 16HBE cells by ELISA. MEG3 and miR-218 binding interaction was predicted by LncBase Predicted v.2 and further confirmed by dual luciferase reporter assay and RNA Immunoprecipitation (RIP) assay. MEG3 was upregulated in COPD tissues and inversely related to FEV1%. MEG3 was upregulated in (CSE)-treated 16HBE cells, and knockdown of MEG3 mitigated CSE-repressed proliferation and CSE-triggered apoptosis or inflammation. MiR-218 was demonstrated as a target miRNA of MEG3. MiR-218 was downregulated in COPD tissues and (CSE)-treated or MEG3 overexpressed 16HBE cells. MiR-218 overexpression attenuated CSE-blocked proliferation and CSE-induced apoptosis or inflammation. Deficiency of MEG3 counteracted CSE-blocked proliferation CSE-induced apoptotic rate and inflammatory cytokine (IL-1β IL-6 and TNF-α) levels, while introduction of anti-miR-218 reversed these effects. MEG3 regulated CSE-inhibited proliferation and CSE-induced apoptosis or inflammation by targeting miR-218, providing a possible therapeutic target for treatment of CSE-induced COPD.
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Affiliation(s)
- Beibei Song
- Department of Respiratory and Critical Care Medicine, The Second Hosptial of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Liyun Ye
- Department of Respiratory and Critical Care Medicine, The Second Hosptial of Hebei Medical University, Shijiazhuang, Hebei, China
| | - Siyu Wu
- Department of Respiratory and Critical Care Medicine, The Second Hosptial of Hebei Medical University, Shijiazhuang, Hebei, China.
| | - Zeng Jing
- Department of Pharmacy, The Fourth Hospital of Shijiazhuang, Shijiazhuang, Hebei, China
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Scoditti E, Carpi S, Massaro M, Pellegrino M, Polini B, Carluccio MA, Wabitsch M, Verri T, Nieri P, De Caterina R. Hydroxytyrosol Modulates Adipocyte Gene and miRNA Expression Under Inflammatory Condition. Nutrients 2019; 11:nu11102493. [PMID: 31627295 PMCID: PMC6836288 DOI: 10.3390/nu11102493] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 10/10/2019] [Accepted: 10/15/2019] [Indexed: 12/13/2022] Open
Abstract
Chronic inflammation of the adipose tissue (AT) is a major contributor to obesity-associated cardiometabolic complications. The olive oil polyphenol hydroxytyrosol (HT) contributes to Mediterranean diet cardiometabolic benefits through mechanisms still partially unknown. We investigated HT (1 and 10 μmol/L) effects on gene expression (mRNA and microRNA) related to inflammation induced by 10 ng/mL tumor necrosis factor (TNF)-α in human Simpson–Golabi–Behmel Syndrome (SGBS) adipocytes. At real-time PCR, HT significantly inhibited TNF-α-induced mRNA levels, of monocyte chemoattractant protein-1, C-X-C Motif Ligand-10, interleukin (IL)-1β, IL-6, vascular endothelial growth factor, plasminogen activator inhibitor-1, cyclooxygenase-2, macrophage colony-stimulating factor, matrix metalloproteinase-2, Cu/Zn superoxide dismutase-1, and glutathione peroxidase, as well as surface expression of intercellular adhesion molecule-1, and reverted the TNF-α-mediated inhibition of endothelial nitric oxide synthase, peroxisome proliferator-activated receptor coactivator-1α, and glucose transporter-4. We found similar effects in adipocytes stimulated by macrophage-conditioned media. Accordingly, HT significantly counteracted miR-155-5p, miR-34a-5p, and let-7c-5p expression in both cells and exosomes, and prevented NF-κB activation and production of reactive oxygen species. HT can therefore modulate adipocyte gene expression profile through mechanisms involving a reduction of oxidative stress and NF-κB inhibition. By such mechanisms, HT may blunt macrophage recruitment and improve AT inflammation, preventing the deregulation of pathways involved in obesity-related diseases.
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Affiliation(s)
- Egeria Scoditti
- National Research Council (CNR) Institute of Clinical Physiology (IFC), 73100 Lecce, Italy.
| | - Sara Carpi
- Laboratory of Molecular Pharmacology, Department of Pharmacy, University of Pisa, 56126 Pisa, Italy.
| | - Marika Massaro
- National Research Council (CNR) Institute of Clinical Physiology (IFC), 73100 Lecce, Italy.
| | - Mariangela Pellegrino
- Laboratory of Applied Physiology, Department of Biological and Environmental Science and Technology (DISTEBA), University of Salento, 73100 Lecce, Italy.
| | - Beatrice Polini
- Laboratory of Molecular Pharmacology, Department of Pharmacy, University of Pisa, 56126 Pisa, Italy.
| | | | - Martin Wabitsch
- Division of Pediatric Endocrinology, Diabetes and Obesity, Department of Pediatrics and Adolescent Medicine, University of Ulm, 89075 Ulm, Germany.
| | - Tiziano Verri
- Laboratory of Applied Physiology, Department of Biological and Environmental Science and Technology (DISTEBA), University of Salento, 73100 Lecce, Italy.
| | - Paola Nieri
- Laboratory of Molecular Pharmacology, Department of Pharmacy, University of Pisa, 56126 Pisa, Italy.
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LncRNA LEGLTBC Functions as a ceRNA to Antagonize the Effects of miR-34a on the Downregulation of SIRT1 in Glucolipotoxicity-Induced INS-1 Beta Cell Oxidative Stress and Apoptosis. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:4010764. [PMID: 31737170 PMCID: PMC6815544 DOI: 10.1155/2019/4010764] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 05/09/2019] [Accepted: 06/17/2019] [Indexed: 02/06/2023]
Abstract
Type 2 diabetes mellitus is a chronic metabolic disorder characterized by elevated blood glucose and/or high serum free fatty acids. Chronic hyperlipidemia causes the dysfunction of pancreatic beta cells, which is aggravated in the presence of hyperglycemia (glucolipotoxicity). Long noncoding RNAs (lncRNAs) have been suggested to play key roles in type 1 diabetes mellitus development. However, their roles in glucolipotoxicity-induced beta cell dysfunction are not fully understood. In the present study, we identified the differentially expressed lncRNAs in INS-1 cells exposed to high glucose and palmitate (HG/PA). Among the dysregulated lncRNAs, NONRATT003679.2 (low expression in glucolipotoxicity-treated beta cells (LEGLTBC)) was involved in glucolipotoxicity-evoked rat islet beta cell damage. LEGLTBC functioned as a molecular sponge of miR-34a in INS-1 cells. Additionally, SIRT1 was identified as a target of miR-34a and LEGLTBC promoted SIRT1 expression by sponging miR-34a. The upregulation of LEGLTBC attenuated HG/PA-induced INS-1 cell injury through the promotion of SIRT1-mediated suppression of ROS accumulation and apoptosis. This is the first study to comprehensively identify the lncRNA expression profiling of HG/PA-treated INS-1 beta cells and to demonstrate that LEGLTBC functions as a competing endogenous RNA and regulates miR-34a/SIRT1-mediated oxidative stress and apoptosis in INS-1 cells undergoing glucolipotoxicity.
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Diabetic Retinopathy, lncRNAs, and Inflammation: A Dynamic, Interconnected Network. J Clin Med 2019; 8:jcm8071033. [PMID: 31337130 PMCID: PMC6678747 DOI: 10.3390/jcm8071033] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 07/03/2019] [Accepted: 07/09/2019] [Indexed: 02/06/2023] Open
Abstract
Diabetic retinopathy (DR) is reaching epidemic levels globally due to the increase in prevalence of diabetes mellitus (DM). DR also has detrimental effects to quality of life, as it is the leading cause of blindness in the working-age population and the most common cause of vision loss in individuals with DM. Over several decades, many studies have recognized the role of inflammation in the development and progression of DR; however, in recent years, accumulating evidence has also suggested that non-coding RNAs, especially long non-coding (lncRNAs), are aberrantly expressed in diabetes and may play a putative role in the development and progression of DR through the modulation of gene expression at the transcriptional, post-transcriptional, or epigenetic level. In this review, we will first highlight some of the key inflammatory mediators and transcription factors involved in DR, and we will then introduce the critical roles of lncRNAs in DR and inflammation. Following this, we will discuss the implications of lncRNAs in other epigenetic mechanisms that may also contribute to the progression of inflammation in DR.
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Maternally expressed gene 3 in metabolic programming. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2019; 1863:194396. [PMID: 31271897 DOI: 10.1016/j.bbagrm.2019.06.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 06/20/2019] [Indexed: 01/10/2023]
Abstract
Maternally Expressed Gene 3 (MEG3) is a long noncoding RNA (lncRNA) that coordinates a diverse array of cellular processes requiring epigenetic regulation of genes and interactions with key signaling proteins and by acting as a competitive endogenous (ce)RNA. Epigenetic modifications driven by in utero nutrition affect MEG3 expression and its role in the development of multiple metabolic disorders. This review examines how epigenetic modification of MEG3 expression can confer adaptedness to different metabolic environments. To this end, we discuss how nutritional status that leads to an increase of MEG3 expression can protect against cancer and metabolic dysfunctions, while interventions that promote MEG3 downregulation minimize the pleiotropic costs associated with its expression. Lastly, we identify research directions that would further shed light on the role of MEG3 in metabolic regulation and in functional imprinted gene networks. This article is part of a Special Issue entitled: ncRNA in control of gene expression edited by Kotb Abdelmohsen.
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