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Dong S, Zhang J, Fu Y, Tang G, Chen J, Sun D, Qi Y, Zhou N. METTL3-mediated m6A modification of SIRT1 mRNA affects the progression of diabetic cataracts through cellular autophagy and senescence. J Transl Med 2024; 22:865. [PMID: 39334185 PMCID: PMC11429169 DOI: 10.1186/s12967-024-05691-w] [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: 07/23/2024] [Accepted: 09/17/2024] [Indexed: 09/30/2024] Open
Abstract
BACKGROUND The increasing incidence of diabetes mellitus has established diabetic cataracts (DC) as a significant worldwide public health issue. The mechanisms underlying DC remain unknown, and effective prevention and treatment strategies are lacking. Accordingly, we aimed to explore the role and mechanism behind N6-methyladenosine (m6A) in DC progression. METHODS Methyltransferase-like 3 (METTL3), p21, Beclin1, LC3, and p62 expression levels were measured in human tissues. This study assessed total m6A levels and common m6A-regulated biomarkers in both in vitro and in vivo DC models. Autophagy flux was detected in vitro through Ad-mCherry-GFP-LC3B and Monodansylcadaverine (MDC) staining. Cellular senescence was assessed utilizing the senescence-associated β-galactosidase (SA-β-Gal) assay. Furthermore, the effect of METTL3 on SIRT1 mRNA modification was demonstrated, and its mechanism was elucidated using RT-qPCR, western blot, RNA stability assays, and RIP analysis. RESULTS METTL3, p21, and p62 expression levels were elevated in lens epithelial cells (LECs) from DC patients, while Beclin1 and LC3 levels were reduced. Silencing METTL3-mediated m6A modifications restored high-glucose-induced autophagy inhibition and prevented premature senescence in LECs. Notably, SIRT1720 and Metformin significantly enhanced autophagosome generation and delayed cellular senescence. The m6A-reading protein YTHDF2 bound to m6A modifications, and YTHDF2 silencing significantly reduced METTL3-mediated SIRT1 inactivation. CONCLUSIONS METTL3 induces senescence in DC by destabilizing SIRT1 mRNA in an m6A-YTHDF2-dependent manner. The METTL3-YTHDF2-SIRT1 axis is a key target and potential pathogenic mechanism in DC.
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Affiliation(s)
- Su Dong
- Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, China
| | - Jiajia Zhang
- Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, China
| | - Yushan Fu
- Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, China
| | - Gege Tang
- Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, China
| | - Jianfeng Chen
- Laboratory Animal Center, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, China
| | - Dawei Sun
- Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, China.
| | - Yanhua Qi
- Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, China.
| | - Nan Zhou
- Department of Ophthalmology, The Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, China.
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YuYan, Yuan E. Regulatory effect of N6-methyladenosine on tumor angiogenesis. Front Immunol 2024; 15:1453774. [PMID: 39295872 PMCID: PMC11408240 DOI: 10.3389/fimmu.2024.1453774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2024] [Accepted: 08/19/2024] [Indexed: 09/21/2024] Open
Abstract
Previous studies have demonstrated that genetic alterations governing epigenetic processes frequently drive tumor development and that modifications in RNA may contribute to these alterations. In the 1970s, researchers discovered that N6-methyladenosine (m6A) is the most prevalent form of RNA modification in advanced eukaryotic messenger RNA (mRNA) and noncoding RNA (ncRNA). This modification is involved in nearly all stages of the RNA life cycle. M6A modification is regulated by enzymes known as m6A methyltransferases (writers) and demethylases (erasers). Numerous studies have indicated that m6A modification can impact cancer progression by regulating cancer-related biological functions. Tumor angiogenesis, an important and unregulated process, plays a pivotal role in tumor initiation, growth, and metastasis. The interaction between m6A and ncRNAs is widely recognized as a significant factor in proliferation and angiogenesis. Therefore, this article provides a comprehensive review of the regulatory mechanisms underlying m6A RNA modifications and ncRNAs in tumor angiogenesis, as well as the latest advancements in molecular targeted therapy. The aim of this study is to offer novel insights for clinical tumor therapy.
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Affiliation(s)
- YuYan
- Department of Laboratory Medicine, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Enwu Yuan
- Department of Laboratory Medicine, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
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Mehta SL, Namous H, Vemuganti R. Stroke triggers dynamic m 6A reprogramming of cerebral circular RNAs. Neurochem Int 2024; 178:105802. [PMID: 38971504 PMCID: PMC11296895 DOI: 10.1016/j.neuint.2024.105802] [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: 04/11/2024] [Revised: 07/02/2024] [Accepted: 07/04/2024] [Indexed: 07/08/2024]
Abstract
We previously showed that stroke alters circular RNA (circRNA) expression profiles. Many circRNAs undergo epitranscriptomic modifications, particularly methylation of adenosine to form N6-methyladenosine (m6A). This modification significantly influences the circRNA metabolism and functionality. Hence, we currently evaluated if transient focal ischemia in adult C57BL/6J mice alters the m6A methylation of circRNAs. Changes in m6A were profiled in the peri-infarct cortex following immunoprecipitation coupled with microarrays. Correlation and gene ontology analyses were performed to understand the association of m6A changes with circRNA regulation and functional implications after stroke. Many circRNAs showed differential regulation (up or down) after stroke, and this change was highest at 24h of reperfusion. Notably, most circRNAs differentially regulated after stroke also exhibited temporal changes in m6A modification patterns. The majority of circRNAs that showed post-stroke differential m6A modifications were derived from protein-coding genes. Hyper-than hypomethylation of circRNAs was most prevalent after stroke. Gene ontology analysis of the host genes suggested that m6A-modified circRNAs might regulate functions such as synapse-related processes, indicating that m6A epitranscriptomic modification in circRNAs could potentially influence post-stroke synaptic pathophysiology.
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Affiliation(s)
- Suresh L Mehta
- Department of Neurological Surgery, University of Wisconsin, Madison, WI, USA
| | - Hadjer Namous
- Department of Neurological Surgery, University of Wisconsin, Madison, WI, USA
| | - Raghu Vemuganti
- Department of Neurological Surgery, University of Wisconsin, Madison, WI, USA; William S. Middleton Memorial Veteran Administration Hospital, Madison, WI, USA.
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Li D, Che X, Gao N, Li J. CircSTRBP contributes to H 2O 2-induced lens epithelium cell dysfunction through increasing NOX4 mRNA stability by recruiting IGF2BP1. Exp Eye Res 2024; 241:109817. [PMID: 38340945 DOI: 10.1016/j.exer.2024.109817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 12/11/2023] [Accepted: 01/30/2024] [Indexed: 02/12/2024]
Abstract
Previous studies have shown that the development of age-related cataract (ARC) is involved in lens epithelium dysfunction, which is associated with abnormally expressed circular RNAs (circRNAs). The current work aims to probe the role of circSTRBP (hsa_circ_0088,427) in hydrogen peroxide (H2O2)-induced lens epitheliums. Lens epithelium tissues were harvested from ARC or normal subjects (n = 23). CircSTRBP, spermatid perinuclear RNA binding protein (STRBP), and nicotinamide adenine dinucleotide phosphate oxidase subunit 4 (NOX4) levels were measured using quantitative reverse transcription polymerase chain reaction (qRT-PCR). Cell proliferation, cycle progression, and apoptosis were assessed using 5-ethynyl-2'-deoxyuridine (EdU), Cell Counting Kit-8 (CCK-8), and flow cytometry assays. Caspase 3 activity, reactive oxygen species (ROS), malondialdehyde (MDA), and Glutathione peroxidases (GSH-PX) levels were detected using corresponding kits. NOX4 protein level was determined using Western blot. The interaction between insulin-like growth factor 2 mRNA-binding protein 1 (IGF2BP1) and circSTRBP or NOX4 was assessed through RNA immunoprecipitation (RIP). CircSTRBP and NOX4 abundances were increased in lens epithelium samples from ARC patients and H2O2-treated SRA01/04 cells. CircSTRBP knockdown might abolish H2O2-triggered SRA01/04 cell proliferation repression and apoptosis and oxidative stress promotion. In mechanism, circSTRBP is bound with IGF2BP1 and improves the stability and expression of NOX4 mRNA in SRA01/04 cells. CircSTRBP facilitated H2O2-induced SRA01/04 cell apoptosis and oxidative stress through by enhancing NOX4 mRNA stability via recruiting IGF2BP1, providing novel insights for ARC progression and treatment.
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Affiliation(s)
- Di Li
- Department of Ophthalmology, Shaanxi Provincial People's Hospital, Xi'an, China.
| | - Xuanyi Che
- Department of Ophthalmology, Shaanxi Provincial People's Hospital, Xi'an, China
| | - Ningning Gao
- Department of Ophthalmology, Shaanxi Provincial People's Hospital, Xi'an, China
| | - Jing Li
- Department of Ophthalmology, Shaanxi Provincial People's Hospital, Xi'an, China
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5
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Mao W, Zhang Z. The Hsa_circ_0105558/miR-182-5p/ATF6 Cascade Affects H 2O 2-Triggered Oxidative Damage and Apoptosis of Human Lens Epithelial Cells. Biochem Genet 2024:10.1007/s10528-024-10753-1. [PMID: 38530576 DOI: 10.1007/s10528-024-10753-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 02/20/2024] [Indexed: 03/28/2024]
Abstract
Age-related cataract (ARC) is the prevalent cause of useful vision loss. Circular RNAs are related to ARC pathogenesis partly through their competing endogenous RNA (ceRNA) activity. Herein, we defined the action of hsa_circ_0105558 in hydrogen peroxide (H2O2)-driven apoptosis and oxidative damage in human lens epithelial SRA01/04 cells. Hsa_circ_0105558, microRNA (miR)-182-5p and activating transcription factor 6 (ATF6) were evaluated by a qRT-PCR or immunoblotting method. The hsa_circ_0105558/miR-182-5p and miR-182-5p/ATF6 relationships were predicted by bioinformatics analysis and confirmed by dual-luciferase reporter assay. Reactive oxygen species level, glutathione peroxidase level, superoxide dismutase activity, and malondialdehyde level were measured using the matched assay kits. Hsa_circ_0105558 was upregulated in human ARC lens and H2O2-exposed SRA01/04 cells. Suppression of hsa_circ_0105558 attenuated H2O2-driven SRA01/04 cell apoptosis and oxidative damage. Hsa_circ_0105558 targeted miR-182-5p, and reduced miR-182-5p expression reversed the influence of hsa_circ_0105558 depletion on H2O2-driven oxidative damage and apoptosis. ATF6 was a target of miR-182-5p, and miR-182-5p-driven downregulation of ATF6 regulated cell oxidative damage and apoptosis under H2O2 insult. Moreover, hsa_circ_0105558 functioned as a ceRNA to post-transcriptionally control ATF6 expression through miR-182-5p competition. Our study demonstrates that hsa_circ_0105558 modulates SRA01/04 cell oxidative damage and apoptosis under H2O2 insult through the miR-182-5p/ATF6 cascade.
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Affiliation(s)
- Wei Mao
- Refractive Surgery Department, Ningbo Eye Hospital, Ningbo, 315010, Zhejiang, China.
| | - Zhe Zhang
- Refractive Surgery Department, Ningbo Eye Hospital, Ningbo, 315010, Zhejiang, China
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Jagaraj CJ, Shadfar S, Kashani SA, Saravanabavan S, Farzana F, Atkin JD. Molecular hallmarks of ageing in amyotrophic lateral sclerosis. Cell Mol Life Sci 2024; 81:111. [PMID: 38430277 PMCID: PMC10908642 DOI: 10.1007/s00018-024-05164-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 01/21/2024] [Accepted: 02/06/2024] [Indexed: 03/03/2024]
Abstract
Amyotrophic lateral sclerosis (ALS) is a fatal, severely debilitating and rapidly progressing disorder affecting motor neurons in the brain, brainstem, and spinal cord. Unfortunately, there are few effective treatments, thus there remains a critical need to find novel interventions that can mitigate against its effects. Whilst the aetiology of ALS remains unclear, ageing is the major risk factor. Ageing is a slowly progressive process marked by functional decline of an organism over its lifespan. However, it remains unclear how ageing promotes the risk of ALS. At the molecular and cellular level there are specific hallmarks characteristic of normal ageing. These hallmarks are highly inter-related and overlap significantly with each other. Moreover, whilst ageing is a normal process, there are striking similarities at the molecular level between these factors and neurodegeneration in ALS. Nine ageing hallmarks were originally proposed: genomic instability, loss of telomeres, senescence, epigenetic modifications, dysregulated nutrient sensing, loss of proteostasis, mitochondrial dysfunction, stem cell exhaustion, and altered inter-cellular communication. However, these were recently (2023) expanded to include dysregulation of autophagy, inflammation and dysbiosis. Hence, given the latest updates to these hallmarks, and their close association to disease processes in ALS, a new examination of their relationship to pathophysiology is warranted. In this review, we describe possible mechanisms by which normal ageing impacts on neurodegenerative mechanisms implicated in ALS, and new therapeutic interventions that may arise from this.
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Affiliation(s)
- Cyril Jones Jagaraj
- MND Research Centre, Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, 75 Talavera Road, Sydney, NSW, 2109, Australia
| | - Sina Shadfar
- MND Research Centre, Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, 75 Talavera Road, Sydney, NSW, 2109, Australia
| | - Sara Assar Kashani
- MND Research Centre, Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, 75 Talavera Road, Sydney, NSW, 2109, Australia
| | - Sayanthooran Saravanabavan
- MND Research Centre, Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, 75 Talavera Road, Sydney, NSW, 2109, Australia
| | - Fabiha Farzana
- MND Research Centre, Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, 75 Talavera Road, Sydney, NSW, 2109, Australia
| | - Julie D Atkin
- MND Research Centre, Macquarie Medical School, Faculty of Medicine, Health and Human Sciences, Macquarie University, 75 Talavera Road, Sydney, NSW, 2109, Australia.
- La Trobe Institute for Molecular Science, La Trobe University, Bundoora, Melbourne, VIC, 3086, Australia.
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7
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Li B, Wang Z, Zhou H, Zou J, Yoshida S, Zhou Y. N6-methyladenosine methylation in ophthalmic diseases: From mechanisms to potential applications. Heliyon 2024; 10:e23668. [PMID: 38192819 PMCID: PMC10772099 DOI: 10.1016/j.heliyon.2023.e23668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 11/23/2023] [Accepted: 12/09/2023] [Indexed: 01/10/2024] Open
Abstract
N6-methyladenosine (m6A) modification, as the most common modification method in eukaryotes, is widely involved in numerous physiological and pathological processes, such as embryonic development, malignancy, immune regulation, and premature aging. Under pathological conditions of ocular diseases, changes in m6A modification and its metabolism can be detected in aqueous and vitreous humor. At the same time, an increasing number of studies showed that m6A modification is involved in the normal development of eye structures and the occurrence and progress of many ophthalmic diseases, especially ocular neovascular diseases, such as diabetic retinopathy, age-related macular degeneration, and melanoma. In this review, we summarized the latest progress regarding m6A modification in ophthalmic diseases, changes in m6A modification-related enzymes in various pathological states and their upstream and downstream regulatory networks, provided new prospects for m6A modification in ophthalmic diseases and new ideas for clinical diagnosis and treatment.
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Affiliation(s)
- Bingyan Li
- Department of Ophthalmology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
- Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan, 410011, China
- National Clinical Research Center for Metabolic Diseases, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - Zicong Wang
- Department of Ophthalmology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
- Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan, 410011, China
- National Clinical Research Center for Metabolic Diseases, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - Haixiang Zhou
- Department of Ophthalmology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
- Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan, 410011, China
- National Clinical Research Center for Metabolic Diseases, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - Jingling Zou
- Department of Ophthalmology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
- Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan, 410011, China
- National Clinical Research Center for Metabolic Diseases, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - Shigeo Yoshida
- Department of Ophthalmology, Kurume University School of Medicine, Kurume, Fukuoka, 830-0011, Japan
| | - Yedi Zhou
- Department of Ophthalmology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
- Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan, 410011, China
- National Clinical Research Center for Metabolic Diseases, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
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Wang S, Zhang J, Chen J, Tang L, Ke M, Xue Y, He Y, Gong Y, Li Z. ω-3PUFAs Inhibit Hypoxia-Induced Retinal Neovascularization via Regulating Microglial Pyroptosis through METTL14-Mediated m6A Modification of IFNB1 mRNA. Appl Biochem Biotechnol 2024:10.1007/s12010-023-04795-1. [PMID: 38175416 DOI: 10.1007/s12010-023-04795-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/09/2023] [Indexed: 01/05/2024]
Abstract
Retinal neovascular disease is the leading reason of vision impairment in all ages. Here, we figured out the function and mechanism of omega-3 polyunsaturated fatty acids (ω-3PUFAs) in hypoxia-induced retinal neovascularization by focusing on microglial pyroptosis. Microglia BV-2 cells were given ω-3PUFAs treatment and co-cultured with mouse retinal microvascular endothelial cells (MRMECs) under hypoxia. Tube formation assay, transwell assay and wound healing assay were utilized to monitor the MRMEC angiogenesis. Cell counting kit-8, western blot, lactate dehydrogenase assay, and enzyme-linked immunosorbent assay were used to assess pyroptosis of BV-2 cells. RNA sequencing and methylated RNA immunoprecipitation-polymerase chain reaction were utilized to identify the target gene of methyltransferase-like 14 (METTL14) and its N6-methyladenosine (m6A) level in BV-2 cells. BV-2 cells prominently enhanced MRMEC angiogenesis under hypoxia, but this effect was abolished after ω-3PUFAs treatment. ω-3PUFAs inhibited pyroptosis in hypoxia-induced BV-2 cells, and BV-2 cell pyroptosis boosted angiogenesis of MRMECs. Additionally, ω-3PUFAs markedly augment the expression of MELLL14 in BV-2 cells, and METTL14 knockdown promoted BV-2 cell pyroptosis and BV-2 cell-mediated angiogenesis in MEMECs. Mechanistically, interferon beta 1 (IFNB1) was a target of METTL14, and METTL14 silencing increased the mRNA expression and decreased the m6A modification of IFNB1 in BV-2 cells. Our results uncovered that ω-3PUFAs diminished hypoxia-induced retinal neovascularization through controlling microglial pyroptosis via METTL14-mediated m6A modification. This study offers a novel potential target for the treatment of retinal neovascular diseases.
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Affiliation(s)
- Shun Wang
- Department of Ophthalmology, Zhongnan Hospital of Wuhan University, 169 Donghu Road, Wuhan, 430071, Hubei, China
| | - Jing Zhang
- Department of Ophthalmology, Zhongnan Hospital of Wuhan University, 169 Donghu Road, Wuhan, 430071, Hubei, China
| | - Jun Chen
- Department of Ophthalmology, The People's Hospital of Huangmei, Huangmei Hospital Affiliated to Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Lanlan Tang
- Department of Ophthalmology, Wuchang Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, China
| | - Min Ke
- Department of Ophthalmology, Zhongnan Hospital of Wuhan University, 169 Donghu Road, Wuhan, 430071, Hubei, China
| | - Yanni Xue
- Department of Ophthalmology, Zhongnan Hospital of Wuhan University, 169 Donghu Road, Wuhan, 430071, Hubei, China
| | - Ying He
- Department of Ophthalmology, Zhongnan Hospital of Wuhan University, 169 Donghu Road, Wuhan, 430071, Hubei, China
| | - Yan Gong
- Department of Biological Repositories, Zhongnan Hospital of Wuhan University, 169 Donghu Road, Wuhan, 430071, China.
- Tumor Precision Diagnosis and Treatment Technology and Translational Medicine, Hubei Engineering Research Center, Zhongnan Hospital of Wuhan University, Wuhan, China.
| | - Zhi Li
- Department of Ophthalmology, Zhongnan Hospital of Wuhan University, 169 Donghu Road, Wuhan, 430071, Hubei, China.
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Wang Y, Li P, Wang C, Bao S, Wang S, Zhang G, Zou X, Wu J, Guan Y, Ji M, Guan H. Lens epithelium cell ferroptosis mediated by m 6A-lncRNA and GPX4 expression in lens tissue of age-related cataract. BMC Ophthalmol 2023; 23:514. [PMID: 38110879 PMCID: PMC10726616 DOI: 10.1186/s12886-023-03205-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 11/06/2023] [Indexed: 12/20/2023] Open
Abstract
BACKGROUND In the present study, we explored the role of N6-methyladenosine (m6A) modification of long non-coding RNAs (lncRNAs) and its association with ferroptosis in lens epithelium cells (LECs) of age-related cataract (ARC). METHODS Through m6A RNA immunoprecipitation sequencing (m6A-RIP-seq) and RNA sequencing (RNA-seq), we identified m6A mediated and differentially expressed lncRNAs (dme-lncRNAs) in ARC patients. Based on bioinformatics analysis, we selected critical dme-lncRNAs and pathways associated with ARC formation to reveal their potential molecular mechanisms. The downregulation of glutathione peroxidase 4 (GPX4), a key component of ferroptosis, was confirmed by real-time RT-PCR (RT-qPCR) and Western blotting in age-related cortical cataract (ARCC) samples. Transmission electron microscopy was used to assess the change in mitochondrial in LECs. RESULTS The analysis revealed a total of 11,193 m6A peaks within lncRNAs, among which 7043 were enriched and 4150 were depleted. Among those, lncRNA ENST00000586817(upstream of the GPX4 gene) was not only significantly upregulated in the LECs of ARCC but also potentially augmented the expression of GPX4 through a cis mechanism. The expression of m6A-modified lncRNA (ENST00000586817) was correlated with that of GPX4 and was downregulated in ARC patients. The TEM results indicated significant mitochondrial changes in ARCC samples. GPX4 downregulation enhanced LEC ferroptosis and decreased viability via RSL3 in SRA01/04 cells. CONCLUSIONS Our results provide insight into the potential function of m6A-modified lncRNAs. M6A-modified lncRNA ENST00000586817 might regulate the expression of GPX4 by a cis mechanism and be implicated in ferroptosis in ARCs.
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Affiliation(s)
- Yong Wang
- Eye Institute, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong, Jiangsu, China
- Nantong University, Nantong, Jiangsu, China
- The Second Affiliated Hospital of Nantong University and First People's Hospital of Nantong City, Nantong, China
| | - Pengfei Li
- Eye Institute, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong, Jiangsu, China
- Nantong University, Nantong, Jiangsu, China
| | - Congyu Wang
- Eye Institute, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong, Jiangsu, China
| | - Sijie Bao
- Eye Institute, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong, Jiangsu, China
| | - Siwen Wang
- Eye Institute, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong, Jiangsu, China
| | - Guowei Zhang
- Eye Institute, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong, Jiangsu, China
| | - Xi Zou
- Department of Ophthalmology, The Third People's Hospital of Changzhou, Jiangsu, China
| | - Jian Wu
- Eye Institute, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong, Jiangsu, China
| | - Yu Guan
- Eye Institute, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong, Jiangsu, China
| | - Min Ji
- Eye Institute, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong, Jiangsu, China.
| | - Huaijin Guan
- Eye Institute, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong, Jiangsu, China.
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10
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Lamas M. Epigenetic mechanisms of non-retinal components of the aging eye and novel therapeutic strategies. Exp Eye Res 2023; 236:109673. [PMID: 37802281 DOI: 10.1016/j.exer.2023.109673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 09/25/2023] [Accepted: 10/02/2023] [Indexed: 10/08/2023]
Abstract
The eye is a complex organ composed of various cell types, each serving a unique purpose. However, aging brings about structural and functional changes in these cells, leading to discomfort and potential pathology. Alterations in gene expression, influenced by aging and environmental factors, significantly affect cell structure and function. Epigenetics, a field focused on understanding the correlation between changes in gene expression, cell function, and environmental factors, plays a crucial role in unraveling the molecular events responsible for age-related eye changes. This prompts the possibility of developing epigenetic strategies to intervene in these changes or reinstate proper molecular activities. Indeed, research has demonstrated that epigenetic modifications, including DNA methylation, histone modification, and non-coding RNAs, are closely associated with age-related alterations in gene expression and cell function. This review aims to compile and synthesize the most recent body of evidence supporting the role of epigenetics in age-related alterations observed in various components of the eye. Specifically, it focuses on the impact of epigenetic changes in the ocular surface, tear film, aqueous humor, vitreous humor, and lens. Furthermore, it highlights the significant advancements that have been made in the field of epigenetic-based experimental therapies, specifically focusing on their potential for treating pathological conditions in the aging eye.
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Affiliation(s)
- Monica Lamas
- Departamento de Farmacobiología, CINVESTAV-Sede Sur, Centro de Investigación sobre el Envejecimiento, CINVESTAV Sede Sur, Calzada de los Tenorios 235, CDMX, Mexico.
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11
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Wu Z, Ren J, Liu G. Deciphering RNA m 6 A regulation in aging: Perspectives on current advances and future directions. Aging Cell 2023; 22:e13972. [PMID: 37641471 PMCID: PMC10577575 DOI: 10.1111/acel.13972] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 08/09/2023] [Indexed: 08/31/2023] Open
Abstract
N6 -methyladenosine (m6 A) is a dynamic and reversible RNA modification that has emerged as a crucial player in the life cycle of RNA, thus playing a pivotal role in various biological processes. In recent years, the potential involvement of RNA m6 A modification in aging and age-related diseases has gained increasing attention, making it a promising target for understanding the molecular mechanisms underlying aging and developing new therapeutic strategies. This Perspective article will summarize the current advances in aging-related m6 A regulation, highlighting the most significant findings and their implications for our understanding of cellular senescence and aging, and the potential for targeting RNA m6 A regulation as a therapeutic strategy. We will also discuss the limitations and challenges in this field and provide insights into future research directions. By providing a comprehensive overview of the current state of the field, this Perspective article aims to facilitate further advances in our understanding of the molecular mechanisms underlying aging and to identify new therapeutic targets for aging-related diseases.
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Affiliation(s)
- Zeming Wu
- State Key Laboratory of Membrane Biology, Institute of ZoologyChinese Academy of SciencesBeijingChina
- Institute for Stem Cell and RegenerationChinese Academy of SciencesBeijingChina
- Beijing Institute for Stem Cell and Regenerative MedicineBeijingChina
| | - Jie Ren
- Institute for Stem Cell and RegenerationChinese Academy of SciencesBeijingChina
- Key Laboratory of RNA Science and Engineering, CAS Key Laboratory of Genomic and Precision Medicine, Beijing Institute of GenomicsChinese Academy of Sciences and China National Center for BioinformationBeijingChina
- University of Chinese Academy of SciencesBeijingChina
- Sino‐Danish CollegeUniversity of Chinese Academy of SciencesBeijingChina
| | - Guang‐Hui Liu
- State Key Laboratory of Membrane Biology, Institute of ZoologyChinese Academy of SciencesBeijingChina
- Institute for Stem Cell and RegenerationChinese Academy of SciencesBeijingChina
- Beijing Institute for Stem Cell and Regenerative MedicineBeijingChina
- University of Chinese Academy of SciencesBeijingChina
- Advanced Innovation Center for Human Brain Protection, and National Clinical Research Center for Geriatric DisordersXuanwu Hospital Capital Medical UniversityBeijingChina
- Aging Translational Medicine Center, International Center for Aging and Cancer, Xuanwu HospitalCapital Medical UniversityBeijingChina
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Guan J, Li Z, Wumaier A, Ma Y, Xie L, Wu H, Chen R, Zhu Y, Zhuo Y. Critical role of transcriptome-wide m6A methylation in the aqueous humor of patients with pseudoexfoliation glaucoma. Exp Eye Res 2023; 231:109473. [PMID: 37061115 DOI: 10.1016/j.exer.2023.109473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 03/13/2023] [Accepted: 04/10/2023] [Indexed: 04/17/2023]
Abstract
N6-methyladenosine (m6A) modification is one of the most common types of methylation modifications in eukaryotic mRNA. However, its role in the pathogenesis of pseudoexfoliation glaucoma (PXG) has not yet been reported. To enhance understanding in this regard, we assessed the m6A methylome in the aqueous humor of patients with PXG. MeRIP-Seq and RNA-Seq analyses were performed to compare the m6A methylomes and gene expression profiles of the aqueous humor of patients with PXG with those of patients with age-related cataract (ARC). Colorimetric m6A quantification was performed to detect global m6A levels. Quantitative reverse transcription PCR confirmed the expression of m6A-related enzymes and mRNAs in both groups. Results showed significantly higher aqueous humor m6A levels in the PXG group than in the ARC group. Five m6A-related enzymes, including METTL3, YTHDC2, HNRNPA2B1, HNRNPC, and LRPPRC, were significantly up-regulated in PXG specimens. We also observed 9728 m6A-modified peaks related to 6126 gene transcripts in the PXG group, with more than 250 genes containing one m6A peak (hypomethylated or hypermethylated). The distribution of the m6A peaks was enriched in coding sequences and 3'-untranslated regions for both groups. GGAC motif structures were also significantly enriched. Bioinformatics analysis further revealed that m6A plays a critical role in extracellular matrix formation and histone deacetylation. Additionally, MMP14, ADAMTSL1, FN1, and HDAC1 showed significant changes in m6A methylation and mRNA expression in the PXG group. Therefore, m6A methylation may regulate extracellular matrix composition in PXG and METTL3 may be a pivotal regulator of this process. In the future, it would be necessary to investigate MMP14, ADAMTSL1, FN1, and HDAC1, which are potential target genes.
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Affiliation(s)
- Jieying Guan
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China; Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, 510060, China; The Affiliated Kashi Hospital, Sun Yat-sen University, Kashi, Xinjiang, 844000, China; The First Department of Ophthalmology, The First People's Hospital of Kashi Prefecture, Kashi, Xinjiang, 844000, China.
| | - Zhidong Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China; Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, 510060, China.
| | - Aizezi Wumaier
- The Affiliated Kashi Hospital, Sun Yat-sen University, Kashi, Xinjiang, 844000, China; The First Department of Ophthalmology, The First People's Hospital of Kashi Prefecture, Kashi, Xinjiang, 844000, China.
| | - Yuncheng Ma
- The Affiliated Kashi Hospital, Sun Yat-sen University, Kashi, Xinjiang, 844000, China; The First Department of Ophthalmology, The First People's Hospital of Kashi Prefecture, Kashi, Xinjiang, 844000, China.
| | - Lingling Xie
- The Affiliated Kashi Hospital, Sun Yat-sen University, Kashi, Xinjiang, 844000, China; The First Department of Ophthalmology, The First People's Hospital of Kashi Prefecture, Kashi, Xinjiang, 844000, China.
| | - Heping Wu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China; Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, 510060, China.
| | - Rongxin Chen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China; Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, 510060, China.
| | - Yingting Zhu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China; Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, 510060, China.
| | - Yehong Zhuo
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou, 510060, China; Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, 510060, China.
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Circular RNA circ_0024037 suppresses high glucose-induced lens epithelial cell injury by targeting the miR-199a-5p/TP53INP1 axis. Mol Cell Toxicol 2023. [DOI: 10.1007/s13273-023-00340-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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14
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Li X, Ma B, Zhang W, Song Z, Zhang X, Liao M, Li X, Zhao X, Du M, Yu J, He S, Yan H. The essential role of N6-methyladenosine RNA methylation in complex eye diseases. Genes Dis 2023; 10:505-520. [PMID: 37223523 PMCID: PMC10201676 DOI: 10.1016/j.gendis.2022.05.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 04/29/2022] [Accepted: 05/08/2022] [Indexed: 11/20/2022] Open
Abstract
There are many complex eye diseases which are the leading causes of blindness, however, the pathogenesis of the complex eye diseases is not fully understood, especially the underlying molecular mechanisms of N6-methyladenosine (m6A) RNA methylation in the eye diseases have not been extensive clarified. Our review summarizes the latest advances in the studies of m6A modification in the pathogenesis of the complex eye diseases, including cornea disease, cataract, diabetic retinopathy, age-related macular degeneration, proliferative vitreoretinopathy, Graves' disease, uveal melanoma, retinoblastoma, and traumatic optic neuropathy. We further discuss the possibility of developing m6A modification signatures as biomarkers for the diagnosis of the eye diseases, as well as potential therapeutic approaches.
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Affiliation(s)
- Xiaohua Li
- Henan Provincial People’s Hospital, Henan Eye Hospital, Henan Eye Institute, Henan Key Laboratory of Ophthalmology and Visual Science, People’s Hospital of Zhengzhou University, People’s Hospital of Henan University, Zhengzhou, Henan 450003, China
| | - Binyun Ma
- Department of Medicine/Hematology, Keck School of Medicine of the University of Southern California, Los Angeles, CA 90033, USA
| | - Wenfang Zhang
- Department of Ophthalmology, Lanzhou University Second Hospital, Lanzhou, Gansu 730030, China
| | - Zongming Song
- Henan Provincial People’s Hospital, Henan Eye Hospital, Henan Eye Institute, Henan Key Laboratory of Ophthalmology and Visual Science, People’s Hospital of Zhengzhou University, People’s Hospital of Henan University, Zhengzhou, Henan 450003, China
| | - Xiaodan Zhang
- Department of Ophthalmology, Tianjin Medical University General Hospital, Laboratory of Molecular Ophthalmology, Tianjin Medical University. Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300052, China
| | - Mengyu Liao
- Department of Ophthalmology, Tianjin Medical University General Hospital, Laboratory of Molecular Ophthalmology, Tianjin Medical University. Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300052, China
| | - Xue Li
- Henan Provincial People’s Hospital, Henan Eye Hospital, Henan Eye Institute, Henan Key Laboratory of Ophthalmology and Visual Science, People’s Hospital of Zhengzhou University, People’s Hospital of Henan University, Zhengzhou, Henan 450003, China
| | - Xueru Zhao
- Henan Provincial People’s Hospital, Henan Eye Hospital, Henan Eye Institute, Henan Key Laboratory of Ophthalmology and Visual Science, People’s Hospital of Zhengzhou University, People’s Hospital of Henan University, Zhengzhou, Henan 450003, China
| | - Mei Du
- Department of Ophthalmology, Tianjin Medical University General Hospital, Laboratory of Molecular Ophthalmology, Tianjin Medical University. Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300052, China
| | - Jinguo Yu
- Department of Ophthalmology, Tianjin Medical University General Hospital, Laboratory of Molecular Ophthalmology, Tianjin Medical University. Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300052, China
| | - Shikun He
- Henan Provincial People’s Hospital, Henan Eye Hospital, Henan Eye Institute, Henan Key Laboratory of Ophthalmology and Visual Science, People’s Hospital of Zhengzhou University, People’s Hospital of Henan University, Zhengzhou, Henan 450003, China
- Department of Ophthalmology, Tianjin Medical University General Hospital, Laboratory of Molecular Ophthalmology, Tianjin Medical University. Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300052, China
- Department of Pathology and Ophthalmology, USC Roski Eye Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Hua Yan
- Department of Ophthalmology, Tianjin Medical University General Hospital, Laboratory of Molecular Ophthalmology, Tianjin Medical University. Department of Pharmacology and Tianjin Key Laboratory of Inflammation Biology, School of Basic Medical Sciences, Tianjin Medical University, Tianjin 300052, China
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m6A Modification-Association with Oxidative Stress and Implications on Eye Diseases. Antioxidants (Basel) 2023; 12:antiox12020510. [PMID: 36830067 PMCID: PMC9952187 DOI: 10.3390/antiox12020510] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 02/09/2023] [Accepted: 02/15/2023] [Indexed: 02/19/2023] Open
Abstract
Oxidative stress (OS) refers to a state of imbalance between oxidation and antioxidation. OS is considered to be an important factor leading to aging and a range of diseases. The eyes are highly oxygen-consuming organs. Due to its continuous exposure to ultraviolet light, the eye is particularly vulnerable to the impact of OS, leading to eye diseases such as corneal disease, cataracts, glaucoma, etc. The N6-methyladenosine (m6A) modification is the most investigated RNA post-transcriptional modification and participates in a variety of cellular biological processes. In this study, we review the role of m6A modification in oxidative stress-induced eye diseases and some therapeutic methods to provide a relatively overall understanding of m6A modification in oxidative stress-related eye diseases.
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The Differential Expression of Circular RNAs and the Role of circAFF1 in Lens Epithelial Cells of High-Myopic Cataract. J Clin Med 2023; 12:jcm12030813. [PMID: 36769461 PMCID: PMC9918043 DOI: 10.3390/jcm12030813] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/02/2023] [Accepted: 01/18/2023] [Indexed: 01/20/2023] Open
Abstract
High-myopic cataract (HMC) is a complex cataract with earlier onset and more rapid progress than age-related cataract (ARC). Circular RNAs (circRNAs) have been implicated in many diseases. However, their involvement in HMC remain largely unexplored. To investigate the role of dysregulated circRNAs in HMC, lens epithelium samples from 24 HMC and 24 ARC patients were used for whole transcriptome sequencing. Compared with ARC, HMC had 3687 uniquely expressed circRNAs and 1163 significantly differentially expressed circRNAs (DEcRs) (|log2FC| > 1, p < 0.05). A putative circRNA-miRNA-mRNA network was constructed based on correlation analysis. We validated the differential expression of 3 DEcRs by quantitative polymerase chain reaction (qPCR) using different sets of samples. We further investigated the role of circAFF1 in cultured lens epithelial cells (LECs) and found that the overexpression of circAFF1 promoted cell proliferation, migration and inhibited apoptosis. We also showed that circAFF1 upregulated Tropomyosin 1 (TPM1) expression by sponging miR-760, which was consistent with the network prediction. Collectively, our study suggested the involvement of circRNAs in the pathogenesis of HMC and provide a resource for further study on this topic.
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Li R, Zhu H, Li Q, Tang J, Jin Y, Cui H. METTL3-mediated m6A modification of has_circ_0007905 promotes age-related cataract progression through miR-6749-3p/EIF4EBP1. PeerJ 2023; 11:e14863. [PMID: 36908822 PMCID: PMC9997201 DOI: 10.7717/peerj.14863] [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: 08/18/2022] [Accepted: 01/17/2023] [Indexed: 03/08/2023] Open
Abstract
Many cases of blindness are caused by age-related cataracts (ARCs). N6-methyladenosine (m6A)-modified circRNA widely participates in disease progression. However, the role of m6A modification of circRNA in ARC is unclear. We mined and elucidated the functions and mechanisms of key circRNAs with m6A modification involved in ARC progression. The GSE153722 dataset was used to mine m6A-mediated key circRNA. Loss-of-function assays and rescue assays were used to explore the effect and mechanism of circRNA on ARC cell proliferation and apoptosis. Has_circ_0007905 was a hypermethylated and upregulated expression in the ARC group relative to the control group both in vivo and in vitro. Silencing of has_circ_0007905 promoted proliferation and inhibited the apoptosis of HLE-B3 cells. METTL3 was upregulated in HLE-B3 cells after ARC modeling and had four binding sites with has_circ_0007905 and a mediated m6A modification of has_circ_0007905. Proliferation was significantly inhibited and apoptosis of HLE-B3 cells was facilitated by METTL3 overexpression, whereas these effects were prevented by has_circ_0007905 silencing. Silencing of has_circ_0007905 led to an alteration in the transcriptome landscape. Differentially expressed genes were mainly involved in immune-related processes and pathways. EIF4EBP1 overexpression promoted apoptosis and suppressed proliferation, and also significantly reversed effects of has_circ_0007905 silencing. Moreover, miR-6749-3p significantly decreased the luciferase activities of wild type plasmids with both of has_circ_0007905 and EIF4EBP1. MiR-6749-3p inhibitor blocked elevation in proliferation and reduced EIF4EBP1 expression and apoptosis conferred by has_circ_0007905 silencing. We reveal for the first time that the commitment of ARC progression is guided by METTL3/has_circ_0007905/miR-6749-3p/EIF4EBP1 axis, and the results provide new insights into ARC pathology.
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Affiliation(s)
- Rui Li
- Department of Ophthalmology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Haohao Zhu
- Department of Ophthalmology, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
| | - Qian Li
- Department of Ophthalmology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Jiancen Tang
- Department of Ophthalmology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yiping Jin
- Department of Ophthalmology, The Fifth People's Hospital of Shanghai, Fudan University, Shanghai, China
| | - Hongping Cui
- Department of Ophthalmology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
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18
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Zhou Y, Jiang R, Jiang Y, Fu Y, Manafhan Y, Zhu J, Jia E. Exploration of N6-Methyladenosine Profiles of mRNAs and the Function of METTL3 in Atherosclerosis. Cells 2022; 11:cells11192980. [PMID: 36230944 PMCID: PMC9563305 DOI: 10.3390/cells11192980] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 08/31/2022] [Accepted: 09/05/2022] [Indexed: 11/25/2022] Open
Abstract
Objectives: N6-methylladenosine (m6A) modification has not been fully studied in atherosclerosis. The objectives of this study were to investigate differentially expressed m6A methylated peaks and mRNAs, along with the regulatory role of methyltransferase 3 (METTL3) in pathological processes of atherosclerosis. Methods: The pathological models of human coronary artery smooth muscle cells (HCASMCs) were induced in vitro. The differentially expressed mRNAs and m6A peaks were identified by RNA-Seq and meRIP-Seq. The potential mechanisms were analyzed via bioinformatic assays. Methylases expression was tested by quantitative real-time polymerase chain reaction (qRT-PCR) and Western blotting (WB) in HCASMCs, and by immunohistochemical assays in 40 human coronary arteries. The knockdown of METTL3 expression in cells was performed by siRNA transfection, and cell proliferation and migration were detected after transfection. Results: We identified 5121 m6A peaks and 883 mRNAs that were expressed differentially in the pathological processes of HCASMCs. Bioinformatic analyses showed that the different m6A peaks were associated with cell growth and cell adhesion, and the 883 genes showed that the extracellular matrix and PI3K/AKT pathway regulate the processes of HCASMCs. Additionally, 10 hub genes and 351 mRNAs with differential methylation and expression levels were found. METTL3 was upregulated in the arteries with atherosclerotic lesions and in the proliferation and migration model of HCASMCs, and pathological processes of HCASMCs could be inhibited by the knockdown of METTL3. The mechanisms behind regulation of migration and proliferation reduced by siMETTL3 are concerned with protein synthesis and energy metabolism. Conclusions: These results revealed a new m6A epigenetic method to regulate the progress of atherosclerosis, which suggest approaches for potential therapeutic interventions that target METTL3 for the prevention and treatment of coronary artery diseases.
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Affiliation(s)
- Yaqing Zhou
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Nanjing Medical University, Guangzhou Road 300, Nanjing 210029, China
| | - Rongli Jiang
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Nanjing Medical University, Guangzhou Road 300, Nanjing 210029, China
| | - Yali Jiang
- The Friendship Hospital of Ili Kazakh Autonomous Prefecture,Ili & Jiangsu Joint Institute of Health, Yining 835000, China
| | - Yahong Fu
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Nanjing Medical University, Guangzhou Road 300, Nanjing 210029, China
| | - Yerbolat Manafhan
- Department of Hypertension, Yili Friendship Hospital, Stalin Road 92, Yining 835000, China
- Correspondence: (Y.M.); (J.Z.); (E.J.); Tel.: +86-13951623205 (E.J.); +86-13809049659 (J.Z.); +86-13899798859 (Y.M.)
| | - Jinfu Zhu
- Department of Cardiovascular Surgery, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
- Correspondence: (Y.M.); (J.Z.); (E.J.); Tel.: +86-13951623205 (E.J.); +86-13809049659 (J.Z.); +86-13899798859 (Y.M.)
| | - Enzhi Jia
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Nanjing Medical University, Guangzhou Road 300, Nanjing 210029, China
- Correspondence: (Y.M.); (J.Z.); (E.J.); Tel.: +86-13951623205 (E.J.); +86-13809049659 (J.Z.); +86-13899798859 (Y.M.)
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Guo L, Xu N, Qiu D, Yang X, Zhao S, Zhao H. Comprehensive analysis of m6A-modified circRNAs in peritoneal metastasis of high grade serious carcinoma of ovary. Front Oncol 2022; 12:988578. [PMID: 36203450 PMCID: PMC9530810 DOI: 10.3389/fonc.2022.988578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 08/03/2022] [Indexed: 11/13/2022] Open
Abstract
Purpose High-grade serous ovarian cancer (HGSOC) remains the most lethal female cancer due to metastasis. CircRNAs are recently identified to be modified by N6-methyladenosine (m6A) in many cells. However, the significance of m6A-modified circular RNAs (circRNAs) has not been elucidated in HGSOC peritoneal metastasis. Here, we aimed to investigate the participation and potential functions of m6A-modified circRNAs in HGSCO peritoneal metastasis. Methods Cancerous tissues were collected from the in situ and the peritoneal metastasis lesions of HGSCO patients. M6A-tagged circRNAs were identified by m6A-modified RNA immunoprecipitation sequencing (m6A-RIP-seq). Gene Ontology (GO) annotation and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses were performed to predict the potential functions of the m6A-modified circRNAs. Results For the m6A-modified circRNAs, 259 were upregulated and 227 were downregulated in the peritoneal metastasis than in the situ lesions of HGSCO patients. For the m6A peaks, 1541 were upregulated and 1293 were downregulated in the peritoneal metastasis than in the in situ lesions of HGSCO patients. For the differential expressed circRNAs, 1911(19.6%) were upregulated and 2883(29.6%) were downregulated in the peritoneal metastasis than in the in situ lesions of HGSCO patients. The upregulated m6A-modified circRNAs were associated with the HIF-1 signaling. The downregulated m6A-modified circRNAs were associated with the MAPK signaling. Conclusions This work firstly identified the transcriptome-wide map of m6A-modified circRNAs in peritoneal metastasis of HGSCO. Our findings provided novel evidences about the participation of m6A-modified circRNAs via HIF-1 and MAPK signaling and a new insight in molecular target of HGSCO peritoneal metastasis.
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Jiapaer Z, Su D, Hua L, Lehmann HI, Gokulnath P, Vulugundam G, Song S, Zhang L, Gong Y, Li G. Regulation and roles of RNA modifications in aging-related diseases. Aging Cell 2022; 21:e13657. [PMID: 35718942 PMCID: PMC9282851 DOI: 10.1111/acel.13657] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 05/03/2022] [Accepted: 06/02/2022] [Indexed: 11/29/2022] Open
Abstract
With the aging of the global population, accumulating interest is focused on manipulating the fundamental aging-related signaling pathways to delay the physiological aging process and eventually slow or prevent the appearance or severity of multiple aging-related diseases. Recently, emerging evidence has shown that RNA modifications, which were historically considered infrastructural features of cellular RNAs, are dynamically regulated across most of the RNA species in cells and thereby critically involved in major biological processes, including cellular senescence and aging. In this review, we summarize the current knowledge about RNA modifications and provide a catalog of RNA modifications on different RNA species, including mRNAs, miRNAs, lncRNA, tRNAs, and rRNAs. Most importantly, we focus on the regulation and roles of these RNA modifications in aging-related diseases, including neurodegenerative diseases, cardiovascular diseases, cataracts, osteoporosis, and fertility decline. This would be an important step toward a better understanding of fundamental aging mechanisms and thereby facilitating the development of novel diagnostics and therapeutics for aging-related diseases.
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Affiliation(s)
- Zeyidan Jiapaer
- College of Life Science & Technology, Xinjiang University, Urumqi, China.,Xinjiang Key laboratory of Biological Resources and Genetic Engineering, Urumqi, China
| | - Dingwen Su
- Friedrich Miescher Laboratory of the Max Planck Society, Tübingen, Germany
| | - Lingyang Hua
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Helge Immo Lehmann
- Cardiovascular Research Center, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Priyanka Gokulnath
- Cardiovascular Research Center, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Gururaja Vulugundam
- Institute of Biochemistry and Cellular Biology, National Research Council of Italy, Naples, Italy
| | - Shannan Song
- College of Life Science & Technology, Xinjiang University, Urumqi, China.,Xinjiang Key laboratory of Biological Resources and Genetic Engineering, Urumqi, China
| | - Lingying Zhang
- College of Life Science & Technology, Xinjiang University, Urumqi, China.,Xinjiang Key laboratory of Biological Resources and Genetic Engineering, Urumqi, China
| | - Ye Gong
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
| | - Guoping Li
- Cardiovascular Research Center, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
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Li Y, Li H, Luo Y, Li X, Chen Z, Zhang W, Li F, Ling L. The Alteration Profiles of m6A-Tagged circRNAs in the Peri-Infarct Cortex After Cerebral Ischemia in Mice. Front Neurosci 2022; 16:869081. [PMID: 35747214 PMCID: PMC9209773 DOI: 10.3389/fnins.2022.869081] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 05/02/2022] [Indexed: 12/13/2022] Open
Abstract
The N6-methyladenosine (m6A) modification acts as a dynamic regulatory factor in diseases by regulating the metabolism and function of the transcriptome, especially mRNAs. However, little is known regarding the functional effects of m6A modifications on circRNAs. In this research, we established a distal middle cerebral artery occlusion (MCAO) model in adult C57BL/6J mice. The mice were divided into three groups: sham surgery, 3 days after MCAO (3d), and 7 days after MCAO (7d). Reverse transcription quantitative polymerase chain reaction (RT-qPCR) demonstrated that the mRNA expression levels of m6A-related methyltransferases (METTL3, METTL14), demethylases (FTO, ALKBH5), and reading proteins (YTHDF1, YTHDF3) altered compared to the sham group. Furthermore, the translation level of ALKBH5 and YTHDF3 was significantly decreased in the 3d group while increased in 7d group. Methylated RNA immunoprecipitation (MeRIP) and circRNA microarray indicated 85 hypermethylated and 1621 hypomethylated circRNAs in the 3d group. In the 7d group, the methylation level increased in 57 and decreased in 66 circRNAs. Subsequently, our results were verified by MeRIP-qPCR. Bioinformatics analysis was performed to analyze the functions of differentially m6A-modified circRNAs. We found some m6A modified-circRNAs associated with cerebral infarction, providing a new direction for the molecular mechanism of stroke.
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Affiliation(s)
- Yudi Li
- Department of Neurology, Shenzhen Hospital, Southern Medical University, Shenzhen, China
| | - Hanzhao Li
- Department of Neurology, Shenzhen Hospital, Southern Medical University, Shenzhen, China
| | - Yang Luo
- School of Physical Education, Southwest University, Chongqing, China
| | - Xiaoqiang Li
- Department of Neurology, Affiliated Xiaolan Hospital, Southern Medical University, Xiaolan People's Hospital, Zhongshan, China
| | - Zhefeng Chen
- Department of Neurology, Shenzhen Hospital, Southern Medical University, Shenzhen, China
| | - Wanzhou Zhang
- Department of Neurology, Shenzhen Hospital, Southern Medical University, Shenzhen, China
| | - Fangming Li
- Department of Neurology, Shenzhen University General Hospital, Shenzhen University Clinical Medical Academy, Shenzhen, China
- Fangming Li
| | - Li Ling
- Department of Neurology, Shenzhen Hospital, Southern Medical University, Shenzhen, China
- *Correspondence: Li Ling
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22
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Interactions of circRNAs with methylation: An important aspect of circRNA biogenesis and function (Review). Mol Med Rep 2022; 25:169. [PMID: 35302170 PMCID: PMC8971914 DOI: 10.3892/mmr.2022.12685] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 02/14/2022] [Indexed: 11/15/2022] Open
Abstract
Circular RNA (circRNA) molecules are noncoding RNAs with unique circular covalently closed structures that contribute to gene expression regulation, protein translation and act as microRNA sponges. circRNAs also have important roles in human disease, particularly tumorigenesis and antitumor processes. Methylation is an epigenetic modification that regulates the expression and roles of DNA and coding RNA and their interactions, as well as of noncoding RNA molecules. Previous studies have focused on the effects of methylation modification on circRNA expression, transport, stability, translation and degradation of circRNAs, as well as how circRNA methylation occurs and the influence of circRNAs on methylation modification processes. circRNA and methylation can also regulate disease pathogenesis via these interactions. In the present study, we define the relationship between circRNAs and methylation, as well as the functions and mechanisms of their interactions during disease progression.
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23
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Xu T, He B, Sun H, Xiong M, Nie J, Wang S, Pan Y. Novel insights into the interaction between N6-methyladenosine modification and circular RNA. MOLECULAR THERAPY. NUCLEIC ACIDS 2022; 27:824-837. [PMID: 35141044 PMCID: PMC8807973 DOI: 10.1016/j.omtn.2022.01.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
As the most prevalent type of RNA modification in eukaryotes, N6-methyladenosine (m6A) can modulate RNA fates such as processing, splicing, maturation, export, stability, translation, and degradation. Circular RNAs (circRNAs), a novel type of non-coding RNA (ncRNAs) characterized by a covalently closed loop structure, play an essential role in various physiological and pathological processes. Extensive studies have revealed that m6A modification is widespread in circRNAs and influences their biogenesis and functions. Intriguingly, circRNAs can affect m6A modification by regulating m6A regulatory proteins. In this review, we summarize the characteristics and biological functions of m6A and circRNAs and focus on recent advances in the interaction of m6A modification and circRNAs. In addition, the potential clinical applications of m6A modification and circRNAs in diagnosis and therapeutic targets are discussed.
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Affiliation(s)
- Tao Xu
- General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
| | - Bangshun He
- Department of Laboratory Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
| | - Huiling Sun
- General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
| | - Mengqiu Xiong
- General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
| | - Junjie Nie
- General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
| | - Shukui Wang
- General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
| | - Yuqin Pan
- General Clinical Research Center, Nanjing First Hospital, Nanjing Medical University, Nanjing 210006, China
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24
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Jiang S, Jia Y, Gao Z. LncRNA KCNQ1OT1 promotes apoptosis and oxidative stress of human lens epithelial cells through epigenetic regulation of WRN. Curr Eye Res 2022; 47:I-X. [PMID: 35179402 DOI: 10.1080/02713683.2022.2026975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
PURPOSE Long non-coding RNA KCNQ1OT1 is fundamental to age-related cataract (ARC), whereas the underlying mechanism is still unknown. Here, we explored the possible mechanism of KCNQ1OT1 in ARC. METHODS The expression of KCNQ1OT1 in ARC patients and H2O2-treated human lens epithelial cell line SRA01/04 was detected. Gene and protein expression were examined by quantitative real-time PCR and western blot. Cell viability and apoptosis were detected by CCK-8 assay and flow cytometry. The content of reactive oxygen species (ROS) was assessed by fluorescent probe DCFH-DA. The relationship among KCNQ1OT1, G9a, H3K9me1/2 and WRN was verified by RNA pull down and Chromatin immunoprecipitation. RESULTS KCNQ1OT1 was up-regulated in the anterior lens capsule tissues of ARC patients and H2O2-treated SRA01/04 cells. KCNQ1OT1 overexpression suppressed cell viability and facilitated apoptosis in H2O2-treated SRA01/04 cells. KCNQ1OT1 up-regulation enhanced the levels of ROS and malondialdehyde (MDA), and reduced the levels of superoxide dismutase (SOD) and catalase (CAT) in H2O2-treated SRA01/04 cells. WRN up-regulation led to a result opposite to KCNQ1OT1 overexpression. The influence of WRN up-regulation on cell viability, apoptosis and oxidative stress of SRA01/04 cells was rescued by KCNQ1OT1 overexpression. Additionally, KCNQ1OT1 interacted with G9a. Both G9a and H3K9me1/2 interacted with WRN promoter. G9a deficiency significantly enhanced WRN expression and repressed H3K9me1/2 expression in SRA01/04 cells, which was abrogated by KCNQ1OT1 up-regulation. CONCLUSION This study demonstrated that KCNQ1OT1 promoted apoptosis and oxidative stress of human LECs through G9a-driven epigenetic regulation of WRN. This work highlights a novel lncRNA involving key regulators of ARC.
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Affiliation(s)
- Shengqun Jiang
- Department of Ophthalmology, The First Affiliated Hospital of Bengbu Medical College, No.287 Changhuai Road, Bengbu 233004, Anhui Province, China
| | - Yanwen Jia
- Eye Institute, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, No 29 Xianglong Lane, Changzhou 211166, Jiangsu Province, China
| | - Ziqing Gao
- Department of Ophthalmology, The First Affiliated Hospital of Bengbu Medical College, No.287 Changhuai Road, Bengbu 233004, Anhui Province, China
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25
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Li A, Gan Y, Cao C, Ma B, Zhang Q, Zhang Q, Yao L. Transcriptome-Wide Map of N 6-Methyladenosine Methylome Profiling in Human Bladder Cancer. Front Oncol 2021; 11:717622. [PMID: 34868913 PMCID: PMC8634328 DOI: 10.3389/fonc.2021.717622] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 10/18/2021] [Indexed: 11/16/2022] Open
Abstract
N6-Methyladenosine (m6A) is the most widespread internal RNA modification in several species. In spite of latest advances in researching the biological roles of m6A, its function in the development and progression of bladder cancer remains unclear. In this study, we used MeRIPty -55-seq and RNA-seq methods to obtain a comprehensive transcriptome-wide m6A profiling and gene expression pattern in bladder cancer and paired normal adjacent tissues. Our findings showed that there were 2,331 hypomethylated and 3,819 hypermethylated mRNAs, 32 hypomethylated and 105 hypermethylated lncRNAs, and 15 hypomethylated and 238 hypermethylated circRNAs in bladder cancer tissues compared to adjacent normal tissues. Furthermore, m6A is most often harbored in the coding sequence (CDS), with some near the start and stop codons between two groups. Functional enrichment analysis revealed that differentially methylated mRNAs, lncRNAs, and circRNAs were mostly enriched in transcriptional misregulation in cancer and TNF signaling pathway. We also found that different m6A methylation levels of gene might regulate its expression. In summary, our results for the first time provide an m6A landscape of human bladder cancer, which expand the understanding of m6A modifications and uncover the regulation of mRNAs, lncRNAs, and circRNAs through m6A modification in bladder cancer.
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Affiliation(s)
- Aolin Li
- Department of Urology, Peking University First Hospital, Beijing, China.,Institute of Urology, Peking University, Beijing, China.,National Urological Cancer Center, Beijing, China.,Beijing Key Laboratory of Urogenital Diseases (Male) Molecular Diagnosis and Treatment Center, Beijing, China
| | - Ying Gan
- Department of Urology, Peking University First Hospital, Beijing, China.,Institute of Urology, Peking University, Beijing, China.,National Urological Cancer Center, Beijing, China.,Beijing Key Laboratory of Urogenital Diseases (Male) Molecular Diagnosis and Treatment Center, Beijing, China
| | - Congcong Cao
- Guangdong and Shenzhen Key Laboratory of Male Reproductive Medicine and Genetics, Institute of Urology, Peking University Shenzhen Hospital, Shenzhen-Peking University-The Hong Kong University of Science and Technology Medical Center, Shenzhen, China
| | - Binglei Ma
- Department of Urology, Peking University First Hospital, Beijing, China.,Institute of Urology, Peking University, Beijing, China.,National Urological Cancer Center, Beijing, China.,Beijing Key Laboratory of Urogenital Diseases (Male) Molecular Diagnosis and Treatment Center, Beijing, China
| | - Quan Zhang
- Department of Urology, Peking University First Hospital, Beijing, China.,Institute of Urology, Peking University, Beijing, China.,National Urological Cancer Center, Beijing, China.,Beijing Key Laboratory of Urogenital Diseases (Male) Molecular Diagnosis and Treatment Center, Beijing, China
| | - Qian Zhang
- Department of Urology, Peking University First Hospital, Beijing, China.,Institute of Urology, Peking University, Beijing, China.,National Urological Cancer Center, Beijing, China.,Beijing Key Laboratory of Urogenital Diseases (Male) Molecular Diagnosis and Treatment Center, Beijing, China
| | - Lin Yao
- Department of Urology, Peking University First Hospital, Beijing, China.,Institute of Urology, Peking University, Beijing, China.,National Urological Cancer Center, Beijing, China.,Beijing Key Laboratory of Urogenital Diseases (Male) Molecular Diagnosis and Treatment Center, Beijing, China
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26
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Wang Y, Wu Z, Huang Y, Zhang Y. Hsa_circ_0004058 inhibits apoptosis of SRA01/04 cells by promoting autophagy via miR-186/ATG7 axis. Exp Eye Res 2021; 211:108721. [PMID: 34375588 DOI: 10.1016/j.exer.2021.108721] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 08/01/2021] [Accepted: 08/05/2021] [Indexed: 02/07/2023]
Abstract
Senile cataract is a common age-related disease in ophthalmology. Hsa_circ_0004058 has been reported to be down-regulated in the lens epithelial cells of senile cataract patients, suggesting that hsa_circ_0004058 is associated with senile cataract. However, the underlying mechanism is still unknown. This study attempted to determine the functional role of hsa_circ_0004058 in senile cataract. We treated human lens epithelial cells (SRA01/04) with H2O2 as senile cataract model, and found that cell viability and autophagy of SRA01/04 cells were severely decreased by H2O2 treatment. Hsa_circ_0004058 was notably down-regulated in H2O2-treated SRA01/04 cells. Moreover, hsa_circ_0004058 overexpression reduced apoptotic cells and the expression of Cleaved-caspase-3 and Bax, and enhanced Bcl-2 expression in H2O2-treated SRA01/04 cells. However, hsa_circ_0004058 silencing caused the opposite results. Hsa_circ_0004058 up-regulation accelerated the expression of autophagy-related proteins LC3-II/LC3-I and Beclin-1 in H2O2-treated SRA01/04 cells, which was partly abolished by 3-Methyladenine (autophagy inhibitor). Additionally, hsa_circ_0004058 functioned as a competing endogenous RNA to competitive binding miR-186, and thus accelerated the expression of its down-stream target, ATG7. Hsa_circ_0004058 promoted autophagy of SRA01/04 cells by regulating miR-186/ATG7 axis. In conclusion, these data demonstrates that hsa_circ_0004058 inhibits apoptosis of SRA01/04 cells by promoting autophagy, which attributes to regulate miR-186/ATG7 axis. Thus, hsa_circ_0004058 may be a potential target for senile cataract treatment.
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Affiliation(s)
- Yingfei Wang
- Department of Ophthalmology, Henan Provincial People's Hospital, Henan Eye Hospital, Henan Eye Institute, No 7 Weiwu Road, Zhengzhou, 450003, China.
| | - Zhong Wu
- Department of Ophthalmology, Henan Provincial People's Hospital, Henan Eye Hospital, Henan Eye Institute, No 7 Weiwu Road, Zhengzhou, 450003, China
| | - Yalin Huang
- Department of Ophthalmology, Henan Provincial People's Hospital, Henan Eye Hospital, Henan Eye Institute, No 7 Weiwu Road, Zhengzhou, 450003, China
| | - Ying Zhang
- Department of Ophthalmology, Henan Provincial People's Hospital, Henan Eye Hospital, Henan Eye Institute, No 7 Weiwu Road, Zhengzhou, 450003, China
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27
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Gao JF, Zhang L. The role of N6-methyladenosine (m6A) in eye diseases. Mol Biol Rep 2021; 48:6145-6150. [PMID: 34331665 DOI: 10.1007/s11033-021-06596-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 07/24/2021] [Indexed: 11/26/2022]
Abstract
N6-methyladenosine (m6A) is the most common form of internal RNA modification in eukaryotes. The dynamic regulation of m6A modification mainly rely on three proteases, installed by m6A methyltransferase, removed by m6A demethylase and recognized by m6A reader protein, which regulates the metabolism of RNA, thereby regulating the processes of cell proliferation, migration, invasion and apoptosis. Recently, a number of studies have found that m6A aberrant methylation in some eye diseases. This review was to summarize the recent research progress on the role of m6A modification in eye diseases and give a perspective on its prospective applications in eye diseases.
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Affiliation(s)
- Jing-Fan Gao
- Eye Hospital, the First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Lu Zhang
- Eye Hospital, the First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China.
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28
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Wu J, Guo X, Wen Y, Huang S, Yuan X, Tang L, Sun H. N6-Methyladenosine Modification Opens a New Chapter in Circular RNA Biology. Front Cell Dev Biol 2021; 9:709299. [PMID: 34368159 PMCID: PMC8342999 DOI: 10.3389/fcell.2021.709299] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Accepted: 07/06/2021] [Indexed: 01/22/2023] Open
Abstract
As the most abundant internal modification in eukaryotic cells, N6-methyladenosine (m6A) in mRNA has shown widespread regulatory roles in a variety of physiological processes and disease progressions. Circular RNAs (circRNAs) are a class of covalently closed circular RNA molecules and play an essential role in the pathogenesis of various diseases. Recently, accumulating evidence has shown that m6A modification is widely existed in circRNAs and found its key biological functions in regulating circRNA metabolism, including biogenesis, translation, degradation and cellular localization. Through regulating circRNAs, studies have shown the important roles of m6A modification in circRNAs during immunity and multiple diseases, which represents a new layer of control in physiological processes and disease progressions. In this review, we focused on the roles played by m6A in circRNA metabolism, summarized the regulatory mechanisms of m6A-modified circRNAs in immunity and diseases, and discussed the current challenges to study m6A modification in circRNAs and the possible future directions, providing a comprehensive insight into understanding m6A modification of circRNAs in RNA epigenetics.
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Affiliation(s)
- Jun Wu
- Department of General Surgery and Pancreatic Injury and Repair Key Laboratory of Sichuan Province, The General Hospital of Western Theater Command, Chengdu, China.,College of Medicine, Southwest Jiaotong University, Chengdu, China
| | - Xin Guo
- Laboratory of Basic Medicine, The General Hospital of Western Theater Command, Chengdu, China
| | - Yi Wen
- Department of General Surgery and Pancreatic Injury and Repair Key Laboratory of Sichuan Province, The General Hospital of Western Theater Command, Chengdu, China
| | - Shangqing Huang
- Department of General Surgery and Pancreatic Injury and Repair Key Laboratory of Sichuan Province, The General Hospital of Western Theater Command, Chengdu, China.,College of Medicine, Southwest Jiaotong University, Chengdu, China
| | - Xiaohui Yuan
- Department of General Surgery and Pancreatic Injury and Repair Key Laboratory of Sichuan Province, The General Hospital of Western Theater Command, Chengdu, China.,College of Medicine, Southwest Jiaotong University, Chengdu, China
| | - Lijun Tang
- Department of General Surgery and Pancreatic Injury and Repair Key Laboratory of Sichuan Province, The General Hospital of Western Theater Command, Chengdu, China.,College of Medicine, Southwest Jiaotong University, Chengdu, China
| | - Hongyu Sun
- Department of General Surgery and Pancreatic Injury and Repair Key Laboratory of Sichuan Province, The General Hospital of Western Theater Command, Chengdu, China.,College of Medicine, Southwest Jiaotong University, Chengdu, China.,Laboratory of Basic Medicine, The General Hospital of Western Theater Command, Chengdu, China
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29
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Tang M, Lv Y. The Role of N6 -Methyladenosine Modified Circular RNA in Pathophysiological Processes. Int J Biol Sci 2021; 17:2262-2277. [PMID: 34239354 PMCID: PMC8241720 DOI: 10.7150/ijbs.60131] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 05/21/2021] [Indexed: 12/14/2022] Open
Abstract
Circular RNA (circRNA) is a type of covalently closed and endogenous non-coding RNA (ncRNA) with tissue- and cell-specific expression patterns generated by a non-canonical splicing event. Previous reports have indicated that circRNAs exert their functions in different ways, thereby participating in various pathophysiological processes. N6 -methyladenosine (m6A) methylation occurs in the N6-position, which is the most abundant and conserved internal transcriptional modification in eukaryotes, including mRNA and ncRNAs. Accumulating evidences confirm that m6A modification also exists in the circRNA and greatly affects the biological functions of circRNA. Their dysregulated expression can be a cause of various pathophysiological processes, such as spermatogenesis, myoblast differentiation, cancer, cardiovascular disease, mental illness and so on. Understanding the role of m6A-modified circRNAs in pathophysiological processes may contribute to better understanding the physiological mechanisms and develop new biomarkers. This review summarizes the regulatory mechanism of m6A modification on circRNA metabolism and the role of m6A-modified circRNAs in pathophysiological processes. This article may pave the way for a better understanding of the role of epigenetically modified circRNAs in pathophysiological process.
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Affiliation(s)
| | - Yonggang Lv
- Mechanobiology and Regenerative Medicine Laboratory, Bioengineering College, Chongqing University, Chongqing, 400044, China
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30
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Xu X, Gao R, Li S, Li N, Jiang K, Sun X, Zhang J. Circular RNA circZNF292 regulates H 2 O 2 -induced injury in human lens epithelial HLE-B3 cells depending on the regulation of the miR-222-3p/E2F3 axis. Cell Biol Int 2021; 45:1757-1767. [PMID: 33851769 DOI: 10.1002/cbin.11615] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 03/22/2021] [Accepted: 04/12/2021] [Indexed: 12/18/2022]
Abstract
Circular RNAs (circRNAs) play important roles in the pathogenesis of age-related cataract (ARC). CircRNA zinc finger protein 292 (circZNF292, hsa_circ_0004058) is downregulated in ARC lens capsules. Here, we focused on its precise roles in oxidative stress underlying the pathogenesis of ARC. CircZNF292, microRNA (miR)-222-3p, and E2F transcription factor 3 (E2F3) were quantified by quantitative real-time polymerase chain reaction or western blot. Cell viability was assessed by the cell counting kit-8 assay. Cell cycle distribution and apoptosis were detected by flow cytometry. The activities of superoxide dismutase, catalase, and malondialdehyde were measured using the corresponding assay kit. Targeted correlations among circZNF292, miR-222-3p, and E2F3 were verified by the dual-luciferase reporter, RNA immunoprecipitation and RNA pull-down assays. Our data showed that circZNF292 was downregulated in ARC tissues and H2 O2 -treated human lens epithelial B3 (HLE-B3) cells. Increased expression of circZNF292 alleviated H2 O2 -induced cell viability suppression, apoptosis promotion, and oxidative stress enhancement. Mechanistically, circZNF292 directly targeted miR-222-3p, and circZNF292 regulated E2F3 expression through miR-222-3p. MiR-222-3p was a functional mediator of circZNF292 in modulating H2 O2 -induced injury in HLE-B3 cells. Furthermore, reduced level of miR-222-3p ameliorated H2 O2 -induced HLE-B3 cell damage by upregulating E2F3. Our present study demonstrated that increased expression of circZNF292 ameliorated H2 O2 -induced injury in HLE-B3 cells at least in part through the miR-222-3p/E2F3 axis, highlighting a novel insight into the involvement of circRNAs in the pathogenesis of ARC.
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Affiliation(s)
- Xinyan Xu
- Department of Ophthalmology, Weifang Eye Hospital, Weifang, Shandong, China
| | - Rongyu Gao
- Department of Ophthalmology, Weifang Eye Hospital, Weifang, Shandong, China
| | - Shuchan Li
- Department of Ophthalmology, Weifang Eye Hospital, Weifang, Shandong, China
| | - Nan Li
- Department of Ophthalmology, Weifang Eye Hospital, Weifang, Shandong, China
| | - Keke Jiang
- Department of Ophthalmology, Weifang Eye Hospital, Weifang, Shandong, China
| | - Xianyong Sun
- Department of Ophthalmology, Weifang Eye Hospital, Weifang, Shandong, China
| | - Jie Zhang
- Department of Ophthalmology, Weifang Eye Hospital, Weifang, Shandong, China
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