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de Sousa BRV, Silva AS, de Assis CS, Diniz TG, Viturino MGM, de Queiroga Evangelista IW, Cavalcante-Silva LHA, Keesen TSL, de Oliveira NFP, Persuhn DC. MiR-9-3 hypermethylation is associated with stages of diabetic retinopathy. J Diabetes Metab Disord 2024; 23:1189-1198. [PMID: 38932799 PMCID: PMC11196486 DOI: 10.1007/s40200-024-01411-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Accepted: 02/20/2024] [Indexed: 06/28/2024]
Abstract
Purpose To investigate the potential relation between methylation of miR-9-3 and stages of diabetic retinopathy (DR). Additionally, we explored whether miR-9-3 methylation impacts the serum levels of Vascular Endothelial Growth Factor (VEGF). Methods A cross-sectional study was conducted with 170 participants with type 2 diabetes, including a control group (n = 64) and a diabetes retinopathy group (n = 106), which was further divided into NPDR (n = 58) and PDR (n = 48) subgroups. Epidemiological, clinical, anthropometric, biochemical ELISA assay were analysed. DNA extracted from leukocytes was used to profile miR-9-3 methylation using PCR-MSP. Results MiR-9-3 hypermethylated profile was higher in the DR group (p < 0.001) and PDR subgroup compared to DM2 control group (p < 0.001). The hypermethylated profile in the PDR subgroup was also higher compared to NPDR subgroup (p < 0.001). There was no difference between DM2 control and NPDR group (p = 0.234). Logistic regression showed that miR-9-3 hypermethylation increases the odds of presenting DR (OR: 2.826; p = 0.002) and PDR (OR: 5.472; p < 0.001). In addition, hypermethylation of miR-9-3 in the DR and NPDR subgroup was associated with higher serum VEGF-A levels (p = 0.012 and p = 0.025, respectively). Conclusion The methylation profile of the miR-9-3 promoter increases the risk of developing PDR. Higher levels of VEGF-A are associated with miR-9-3 hypermethylated profile in patients in the DR and NPDR stages. Supplementary Information The online version contains supplementary material available at 10.1007/s40200-024-01411-9.
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Affiliation(s)
| | - Alexandre Sérgio Silva
- Department of Physical Education, Federal University of Paraiba, Joao Pessoa, Paraiba, Brazil
| | - Caroline Severo de Assis
- Post-Graduate Program in Nutrition Science, Federal University of Paraiba, Joao Pessoa, Paraiba, Brazil
| | - Tainá Gomes Diniz
- Post-Graduate Program in Nutrition Science, Federal University of Paraiba, Joao Pessoa, Paraiba, Brazil
| | - Marina Gonçalves Monteiro Viturino
- Ophthalmology, Otolaryngology and Oral and Maxillofacial Surgery Unit, Lauro Wanderley University Hospital, Federal University of Paraiba, Paraiba, Brazil
| | | | | | | | | | - Darlene Camati Persuhn
- Post-Graduate Program in Nutrition Science, Federal University of Paraiba, Joao Pessoa, Paraiba, Brazil
- Department of Molecular Biology, Federal University of Paraiba, Joao Pessoa, Paraiba, Brazil
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Dickkopf-1 exerts protective effects by inhibiting PANoptosis and retinal neovascularization in diabetic retinopathy. Biochem Biophys Res Commun 2022; 617:69-76. [PMID: 35691117 DOI: 10.1016/j.bbrc.2022.05.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 04/27/2022] [Accepted: 05/01/2022] [Indexed: 11/22/2022]
Abstract
Diabetic retinopathy (DR) is a key reason for legal blindness worldwide. Currently, it is urgently necessary to determine the etiology and pathological molecular mechanism of DR to search for resultful therapies. Dickkopf-1 (DKK1) is inhibitive for canonical Wnt signaling via negative feedback, and has been reported as a biomarker for DR. However, the related mechanisms are still unclear. In this work, our data showed that DKK1 was decreased in the vitreous tissues at an early stage of diabetes triggered by streptozotocin (STZ) injection in rats. We subsequently found that DKK1 intravitreal injection significantly ameliorated the physiological function of retina in STZ-challenged rats, accompanied by improved retinal structure. Surprisingly, our results indicated that DKK1 injection remarkably suppressed PANoptosis in retinal tissues of STZ-challenged rats with DR, as proved by ameliorated pyroptosis, apoptosis and necroptosis, which were mainly through the blockage of cleaved Gasdermin-D (GSDMD), Caspase-3 and receptor-interacting protein kinase-3 (RIPK3). Additionally, Wnt signaling including the expression of Wnt, β-catenin and LDL receptor-related protein 5/6 (LRP5/6) was also highly prohibited in retina of DKK1-injected rats with DR. Furthermore, retinal neovascularization and acellular vessel in DR rats were also considerably abolished after DKK1 injection, accompanied by reduced expression levels of retinal vascular endothelial growth factor (VEGF), matrix metalloproteinase-2 (MMP2) and matrix metalloproteinase-9 (MMP9). More in vitro experiments showed that DKK1 treatment markedly repressed the proliferative and migratory ability of endothelial cells via inhibiting angiogenesis-related molecules. Together, all our results broaden the knowledge of the correlation between DKK1 and DR, and then provide a novel therapeutic strategy for the suppression of management of DR.
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Wang Y, Wang X, Wang YX, Ma Y, Di Y. The Long-Noncoding RNA TUG1 Regulates Oxygen-Induced Retinal Neovascularization in Mice via MiR-299. Invest Ophthalmol Vis Sci 2022; 63:37. [PMID: 35084431 PMCID: PMC8802012 DOI: 10.1167/iovs.63.1.37] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Purpose The oxygen-induced retinal neovascularization mouse model closely approximates pathological changes associated with human retinal neovascularization-associated diseases, including retinopathies. We used this model and human retinal endothelial cells (HRECs) under hypoxia to explore the relationship between taurine upregulated gene-1 (TUG1), vascular endothelial growth factor (VEGF), and miR-299-3p on retinopathy of prematurity (ROP). Methods An oxygen-induced retinopathy (OIR) mouse model was established; the mice were divided into a normal control group, OIR group, TUG1 control group (lentivirus control), and TUG1-knockdown group. The apoptosis of retinal cells was evaluated using a TUNEL assay. Angiogenic, apoptotic, and inflammatory factors were detected by Western blot, immunohistochemistry, and immunofluorescence analyses. HRECs were cultured under hypoxia and assessed for VEGF expression, apoptosis, tubule formation, and migration ability. The relationship between TUG1, VEGF, and miR-299-3p was detected via a dual luciferase reporter gene assay. Results Intravitreal injection of TUG1 lentivirus reduced the inflammatory response in the mouse retinal tissue and markedly reduced pathological changes in the retina. Overexpression of miR-299 in HRECs reduced the apoptosis rate, tube formation, and migration ability of hypoxia-treated cells, thereby inhibiting the formation of new blood vessels. The dual luciferase reporter gene assay suggested that miR-299 has binding sites for TUG1 and VEGF. Conclusions TUG1 reduces the expression of VEGFA by competitively adsorbing miR-299-3p and facilitates the regulation of retinal neovascularization, suggesting that it may serve as a new therapeutic target for retinal neovascular diseases.
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Affiliation(s)
- Yue Wang
- Department of Ophthalmology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Xue Wang
- Department of Ophthalmology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Yue-Xia Wang
- Department of Ophthalmology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Yuan Ma
- Department of Ophthalmology, Shengjing Hospital of China Medical University, Shenyang, China
| | - Yu Di
- Department of Ophthalmology, Shengjing Hospital of China Medical University, Shenyang, China
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MicroRNA-139-5p Alleviates High Glucose-Triggered Human Retinal Pigment Epithelial Cell Injury by Targeting LIM-Only Factor 4. Mediators Inflamm 2021; 2021:1629783. [PMID: 34725544 PMCID: PMC8557081 DOI: 10.1155/2021/1629783] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 09/12/2021] [Accepted: 09/16/2021] [Indexed: 11/18/2022] Open
Abstract
Diabetic retinopathy (DR) is a type of diabetes complication, which can result in loss of vision in adults worldwide. Increasing evidence has revealed that microRNAs (miRs) can regulate DR progression. Thus, the present study was aimed at assessing the possible mechanism of miR-139-5p in high glucose- (HG-) incubated retinal pigment epithelial (ARPE-19) cells. The present results demonstrated that miR-139-5p expression was notably reduced in the serum samples of patients with DR, as well as in ARPE-19 cells treated with HG in a time-dependent manner. Moreover, miR-139-5p was markedly overexpressed by transfection of miR-139-5p mimics into ARPE-19 cells. Overexpression of miR-139-5p markedly induced cell viability and repressed HG-triggered apoptosis. Furthermore, overexpression of miR-139-5p relived HG-enhanced oxidative stress injury. It was found that HG induced malondialdehyde levels but decreased superoxide dismutase and glutathione peroxidase activities in ARPE-19 cells. In addition, overexpression of miR-139-5p could markedly decrease intracellular stress. The results demonstrated that overexpression of miR-139-5p effectively repressed HG-activated inflammation, as indicated by the upregulation of inflammation cytokines, including TNF-α, IL-6, and Cox-2, in ARPE-19 cells. Subsequently, it was identified that LIM-only factor 4 (LMO4) could act as a downstream target for miR-139-5p. LMO4 expression was significantly increased in patients with DR and HG-treated ARPE-19 cells. Mechanistically, knockdown of LMO4 reversed the biological role of miR-139-5p in proliferation, apoptosis, oxidative stress, and release of inflammation factors in vitro. Collectively, these results suggested that miR-139-5p significantly decreased ARPE-19 cell injury caused by HG by inducing proliferation and suppressing cell apoptosis, oxidant stress, and inflammation by modulating LMO4.
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de Assis CS, Silva AS, Dos Santos Nunes MK, Filho JM, do Nascimento RAF, Gomes CNAP, de Queiroga Evangelista IW, de Oliveira NFP, Persuhn DC. Methylation Profile of miR-9-1 and miR-9-1/-9-3 as Potential Biomarkers of Diabetic Retinopathy. Curr Diabetes Rev 2021; 17:e123120189795. [PMID: 33388023 DOI: 10.2174/1573399817666210101104326] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 10/17/2020] [Accepted: 10/23/2020] [Indexed: 11/22/2022]
Abstract
AIMS Analysis of the relationship between the methylation profile of miR-9-1 or miRs -9-1 / -9-3 and diabetic retinopathy. BACKGROUND Diabetic Retinopathy (DR) is a frequent complication of Diabetes mellitus and it has a decisive impact on the quality of life, as it is one of the biggest causes of blindness in the adult population. Levels of microRNA-9 have been shown to be related to diabetes but little is known about its involvement with DR in humans. OBJECTIVE To analyze the relationship between the methylation profile of miR-9-1 or miRs -9-1/-9-3 and DR. METHODS 103 patients diagnosed with diabetes for 5 to 10 years were analyzed. The data were categorized according to clinical, biochemical, lifestyle and anthropometric parameters. DNA extracted from leukocyte samples was used to determine the methylation profile of miRs-9-1 and -9-3 using a specific methylation PCR assay. RESULTS miR-9-1 methylation was related to diabetic retinopathy, indicating that methylation of this miR increases the chances of presenting retinopathy up to 5 times. In our analyses, diabetics with lower levels of creatinine and CRP showed significant reductions (99% and 97%) in presenting DR. Methylation of both miRs-9-1 and 9-3 methylated increases the chances of presenting DR by 8 times; in addition, a sedentary lifestyle can increase the risk for the same complication by up to 6 times. CONCLUSION Our results suggest that both methylation of miR-9-1 and e miRs-9-1 / 9-3 favors DR in patients with diabetes in a period of 5 to 10 years of diagnosis.
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Affiliation(s)
| | | | - Mayara Karla Dos Santos Nunes
- Post-Graduation Program in Development and Technological Innovation of Medicines (DITM), Federal University of Paraiba, Joao Pessoa, Brazil
| | - João Modesto Filho
- Department of Internal Medicine, Federal University of Paraiba, Joao Pessoa, Brazil
| | | | | | | | | | - Darlene Camati Persuhn
- Department of Molecular Biology and Post-Graduation Program in Nutrition Science, Federal University of Paraiba, Joao Pessoa, Brazil
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Chang X, Zhu G, Cai Z, Wang Y, Lian R, Tang X, Ma C, Fu S. miRNA, lncRNA and circRNA: Targeted Molecules Full of Therapeutic Prospects in the Development of Diabetic Retinopathy. Front Endocrinol (Lausanne) 2021; 12:771552. [PMID: 34858342 PMCID: PMC8631471 DOI: 10.3389/fendo.2021.771552] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 10/25/2021] [Indexed: 12/20/2022] Open
Abstract
Diabetic retinopathy (DR) is a common diabetic complication and the main cause of blindness worldwide, which seriously affects the quality of life of patients. Studies have shown that noncoding RNA (ncRNA) has distinct differentiated expression in DR and plays an important role in the occurrence and development of DR. ncRNAs represented by microRNAs (miRNAs), lncRNAs (lncRNAs), and circRNAs (circRNAs) have been shown to be widely involved in the regulation of gene expression and affect multiple biological processes of retinopathy. This article will review three RNAs related to the occurrence and development of DR on the basis of previous studies (especially their effects on retinal microangiopathy, retinal pigment epithelial cells, and retinal nerve cells) and discuss their underlying mechanisms and connections. Overall, this review will help us better understand the role of ncRNAs in the occurrence and development of DR and provide ideas for exploring potential therapeutic directions and targets.
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Affiliation(s)
- Xingyu Chang
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Guomao Zhu
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Zongyan Cai
- The Second Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Yaqi Wang
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Rongna Lian
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Xulei Tang
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
- The Second Clinical Medical College, Lanzhou University, Lanzhou, China
- Gansu Province Clinical Research Center for Endocrine Disease, Lanzhou, China
| | - Chengxu Ma
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
- The Second Clinical Medical College, Lanzhou University, Lanzhou, China
| | - Songbo Fu
- The First Clinical Medical College, Lanzhou University, Lanzhou, China
- The Second Clinical Medical College, Lanzhou University, Lanzhou, China
- Gansu Province Clinical Research Center for Endocrine Disease, Lanzhou, China
- *Correspondence: Songbo Fu,
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Su Y, Yi Y, Li L, Chen C. circRNA-miRNA-mRNA network in age-related macular degeneration: From construction to identification. Exp Eye Res 2020; 203:108427. [PMID: 33383027 DOI: 10.1016/j.exer.2020.108427] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 12/21/2020] [Accepted: 12/22/2020] [Indexed: 02/09/2023]
Abstract
The aim of the present study was to investigate the pathogenesis of age-related macular degeneration (AMD) by constructing a regulatory circRNA-miRNA-mRNA network. By adjusting the P value to <0.05 and the absolute log value of fold change to >0.25, 2920 and 1057 differentially expressed mRNAs were identified from GSE50195 and GSE29801, respectively. Based on a literature review, Starbase database analysis, and RNA hybrid assays, we obtained 77 miRNA-mRNA and 331 circRNA-miRNA pairs. After combining these pairs, we constructed a circRNA-miRNA-mRNA network possessing 303 circRNA nodes, 4 miRNA nodes, 51 mRNA nodes, and 408 edges. By utilizing protein-protein network analysis, the MCODE algorithm, and the highest degree of circRNA node, we identified the regulatory axis of hsa_circRNA7329/hsa-miR-9/SCD. Hsa_circRNA7329 may regulate SCD through hsa-miR-9 to promote macrophage-mediated inflammation and pathologic angiogenesis, which lead to AMD development. However, the underlying details require further investigation.
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Affiliation(s)
- Yu Su
- Eye Center, Renmin Hospital of Wuhan University, Wuhan, Hubei province, 430060, PR China
| | - Yuexiong Yi
- Department of Obstetrics and Gynecology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei province, 430071, PR China
| | - Lu Li
- Eye Center, Renmin Hospital of Wuhan University, Wuhan, Hubei province, 430060, PR China
| | - Changzheng Chen
- Eye Center, Renmin Hospital of Wuhan University, Wuhan, Hubei province, 430060, PR China.
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8
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Wang Y, Lin W, Ju J. MicroRNA-409-5p promotes retinal neovascularization in diabetic retinopathy. Cell Cycle 2020; 19:1314-1325. [PMID: 32292119 DOI: 10.1080/15384101.2020.1749484] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Retinal neovascularization, which is characterized by the increased proliferation, migration, and tube formation of retinal microvascular endothelial cells (RMECs), contributes to the progression of diabetic retinopathy (DR). MiR-409-5p has been reported to be upregulated in peripheral blood of DR patients and in vascular endothelial growth factor (VEGF)-induced RMECs. However, the role of miR-409-5p in retinal neovascularization of DR remains unelucidated. METHOD The expression of miR-409-5p was measured in retinal tissues of streptozocin-induced and db/db diabetic mice, in high glucose-induced mouse RMECs (mRMECs), and in vitreous fluid of proliferative DR patients. Antagomir of miR-409-5p was intravitreally injected into diabetic mice. Proliferation, migration, and tube formation were detected using cell counting kit-8 assay, transwell assay, and microscope observation, respectively. Luciferase reporter assay was used to detect the direct interaction between miR-409-5p and peroxisome proliferator-activated receptor-α (PPARα). RESULT MiR-409-5p was upregulated in retinal tissues of diabetic mice, in high glucose-induced mRMECs, and in vitreous fluid of proliferative DR patients. The knockdown of miR-409-5p attenuated retinal neovascularization in vivo. The overexpression of miR-409-5p promotes the proliferation, migration, and tube formation, and increased VEGF expression and secretion, while the knockdown of miR-409-5p suppressed the VEGF-induced retinal neovascularization in vitro. PPARα is a downstream target of miR-409-5p, and PPARα overexpression negated the promotion of miR-409-5p overexpression on the proliferation, migration, and tube formation of mRMECs. CONCLUSION Our findings demonstrated that miR-409-5p acted as a neovasculogenic factor in DR, and anti-miR-409-5p therapy may provide a novel strategy in treating DR.
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Affiliation(s)
- Ying Wang
- Department of Endocrinology, Weihai Municipal Hospital , Weihai, Shandong, China
| | - Wenwen Lin
- Department of Endocrinology, Weihai Municipal Hospital , Weihai, Shandong, China
| | - Jianghua Ju
- Department of Endocrinology, Qilu Hospital of Shandong University (Qingdao) , Qingdao, Shandong, China
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Cheng XW, Chen ZF, Wan YF, Zhou Q, Wang H, Zhu HQ. Long Non-coding RNA H19 Suppression Protects the Endothelium Against Hyperglycemic-Induced Inflammation via Inhibiting Expression of miR-29b Target Gene Vascular Endothelial Growth Factor a Through Activation of the Protein Kinase B/Endothelial Nitric Oxide Synthase Pathway. Front Cell Dev Biol 2019; 7:263. [PMID: 31737629 PMCID: PMC6838022 DOI: 10.3389/fcell.2019.00263] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 10/17/2019] [Indexed: 01/18/2023] Open
Abstract
It has been shown that non-coding RNAs (ncRNAs) play an important regulatory role in pathophysiological processes involving inflammation. The vascular endothelial growth factor A (VEGFA) gene also participates in the inflammatory process. However, the relationships between ncRNAs and VEGFA are currently unclear. Here, this study was designed to determine the relationship between long non-coding RNA (lncRNA) H19, mircoRNA29b (miR-29b), and VEGFA in the development of diabetes mellitus (DM). We demonstrate that H19 is upregulated and miR-29b downregulated in individuals with DM and directly binds miR-29b. VEGFA is the target of miR-29b in the vascular endothelium of individuals with DM. We found that positive modulation of miR29b and inhibition of H19 and VEGFA significantly attenuates high glucose-induced endothelial inflammation and oxidative stress. We also found that the protein kinase B/endothelial nitric oxide synthase (AKT/eNOS) signal pathway in endothelial cells is activated through regulation of miR29b and H19 endogenous RNAs. We conclude that H19 suppression protects the endothelium against high glucose-induced inflammation and oxidative stress in endothelial cells by upregulation of miR-29b and downregulation of VEGFA through AKT/eNOS signal pathway activation. These results suggest a novel link between dysregulated ncRNA expression, inflammation, and the signaling pathway in the vascular endothelium of individuals with DM, indicating a promising strategy for preventing cardiovascular disease in such individuals.
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Affiliation(s)
- Xiao-Wen Cheng
- Department of Clinical Laboratory, The First Affiliated Hospital, Anhui Medical University, Hefei, China.,Laboratory of Molecular Biology, Department of Biochemistry, Anhui Medical University, Hefei, China
| | - Zhen-Fei Chen
- Department of Vasculocardiology, Hefei Hospital Affiliated to Anhui Medical University, Hefei, China
| | - Yu-Feng Wan
- Department of Otolaryngology, The Affiliated Chaohu Hospital, Anhui Medical University, Hefei, China
| | - Qing Zhou
- Laboratory of Molecular Biology, Department of Biochemistry, Anhui Medical University, Hefei, China
| | - Hua Wang
- Department of Oncology, The First Affiliated Hospital, Institute for Liver Disease, Anhui Medical University, Hefei, China
| | - Hua-Qing Zhu
- Laboratory of Molecular Biology, Department of Biochemistry, Anhui Medical University, Hefei, China
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Network Pharmacology-Based Prediction and Verification of the Targets and Mechanism for Panax Notoginseng Saponins against Coronary Heart Disease. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 2019:6503752. [PMID: 31354855 PMCID: PMC6636530 DOI: 10.1155/2019/6503752] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 05/08/2019] [Accepted: 06/03/2019] [Indexed: 12/15/2022]
Abstract
Coronary heart disease (CHD) is the worldwide leading cause for cardiovascular death. Panax notoginseng saponin (PNS), which is the main bioactive compound of panax notoginseng, has been generally accepted to exert a remarkable effect on CHD for a long time. However, to reveal the underlying treatment target and corresponding mechanism of PNS against CHD is still a substantial challenge. In this work, the targets and mechanism of PNS against CHD were successfully achieved by pharmacology-based prediction and experimental verification. 36 common targets were screened out through integrating the gene expression profile of CHD and the chemical-protein data of PNS. Then, two key nodes were further selected for verification by experiment after analyzing GO function, KEGG pathway, coexpression, and topology analysis. Results showed that PNS has protected the human umbilical vein endothelial cells from H2O2-induced oxidative stress by inhibiting early cell apoptosis via upregulating VEGFA mRNA expression. Therefore, our research has successfully pointed out one treatment target and apoptotic inhibition caused by PNS with method of integrating bioinformatics prediction and experimental verification, which has partially explained the pharmacological mechanism of PNS against CHD.
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Zhang W, Chen L, Geng J, Liu L, Xu L. β‑elemene inhibits oxygen‑induced retinal neovascularization via promoting miR‑27a and reducing VEGF expression. Mol Med Rep 2019; 19:2307-2316. [PMID: 30664207 PMCID: PMC6392088 DOI: 10.3892/mmr.2019.9863] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 12/14/2018] [Indexed: 12/13/2022] Open
Abstract
The present study aimed to investigate the significant role of β-elemene in mouse models of oxygen-induced retinopathy (OIR). C57BL/6J neonatal mice were used to establish OIR models. They were divided into four groups: Normoxia, OIR, OIR control and OIR‑treated. Mice in the OIR group were exposed to 75±5% oxygen for 5 days and returned to a normal oxygen environment on postnatal day 12 (P12). The OIR treated group was intravitreally injected with 1 µl β‑elemene on P12 and subsequently returned to a normal oxygen environment for 5 days (P12‑P17). Retinas were obtained on P17. Retinal neovascularization (RNV) was detected using adenosine diphosphatase staining and analyzed by counting the nuclei of neovascular endothelial cells. Vascular endothelial growth factor (VEGF) expression was determined by reverse transcription‑quantitative polymerase chain reaction, immunohistochemistry and western blot analysis. MicroRNA (miRNA/miR) microarrays were used to screen out differentially expressed miRNAs between the OIR and β‑elemene‑treated groups. Binding the 3'‑untranslated region (UTR) of VEGF and miR‑27a was confirmed using luciferase assays. It was found that high oxygen concentrations accelerated RNV and increased the number of preretinal neovascular cells; β‑elemene treatment reduced these effects. VEGF mRNA and protein expression was higher in the OIR and OIR control groups, compared with the normoxia and OIR‑treated groups. Further, it was shown that miR‑22, miR‑181a‑1, miR‑335‑5p, miR‑669n, miR‑190b, miR‑27a and miR‑93 were upregulated in the OIR‑treated group, and downregulated in the OIR group. The prediction websites TargetScan and miRanda revealed that VEGF contained a potential miR‑27a binding site in its 3'‑untranslated region (UTR). Luciferase assays demonstrated that miR‑27a directly bound to the 3'‑UTR of VEGF. In vitro experiments demonstrated that miR‑27a inhibited VEGF expression. In addition, β‑elemene treatment upregulate miR‑27a expression in vivo and in vitro. When miR‑27a expression was depleted by miR‑27a inhibitor, the protective effect of β‑elemene on RNV was eliminated. The present study demonstrated that β‑elemene reduced RNV in mouse OIR models via miR‑27a upregulation, leading to reduced VEGF expression. This finding may contribute to the development of novel therapeutic strategies for human retinopathy.
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Affiliation(s)
- Weilai Zhang
- Department of Ophthalmology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Lei Chen
- Department of Ophthalmology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Jin Geng
- Department of Ophthalmology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Limin Liu
- Department of Ophthalmology, The First Affiliated Hospital of China Medical University, Shenyang, Liaoning 110001, P.R. China
| | - Li Xu
- Department of Ophthalmology, The Fourth People's Hospital of Shenyang, Shenyang, Liaoning 110031, P.R. China
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