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Xu GE, Zhao X, Li G, Gokulnath P, Wang L, Xiao J. The landscape of epigenetic regulation and therapeutic application of N 6-methyladenosine modifications in non-coding RNAs. Genes Dis 2024; 11:101045. [PMID: 38988321 PMCID: PMC11233902 DOI: 10.1016/j.gendis.2023.06.015] [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: 11/17/2022] [Revised: 05/18/2023] [Accepted: 06/04/2023] [Indexed: 07/12/2024] Open
Abstract
RNA N6-methyladenosine (m6A) methylation is the most abundant and conserved RNA modification in eukaryotes. It participates in the regulation of RNA metabolism and various pathophysiological processes. Non-coding RNAs (ncRNAs) are defined as small or long transcripts which do not encode proteins and display numerous biological regulatory functions. Similar to mRNAs, m6A deposition is observed in ncRNAs. Studying RNA m6A modifications on ncRNAs is of great importance specifically to deepen our understanding of their biological roles and clinical implications. In this review, we summarized the recent research findings regarding the mutual regulation between RNA m6A modification and ncRNAs (with a specific focus on microRNAs, long non-coding RNAs, and circular RNAs) and their functions. We also discussed the challenges of m6A-containing ncRNAs and RNA m6A as therapeutic targets in human diseases and their future perspective in translational roles.
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Affiliation(s)
- Gui-E Xu
- Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong) and School of Life Sciences, Shanghai University, Nantong, Jiangsu 226011, China
- Cardiac Regeneration and Ageing Lab, Institute of Cardiovascular Sciences, Shanghai Engineering Research Center of Organ Repair, School of Life Science, Shanghai University, Shanghai 200444, China
| | - Xuan Zhao
- Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong) and School of Life Sciences, Shanghai University, Nantong, Jiangsu 226011, China
- Cardiac Regeneration and Ageing Lab, Institute of Cardiovascular Sciences, Shanghai Engineering Research Center of Organ Repair, School of Life Science, Shanghai University, Shanghai 200444, China
| | - Guoping Li
- Cardiovascular Division of the Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Priyanka Gokulnath
- Cardiovascular Division of the Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Lijun Wang
- Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong) and School of Life Sciences, Shanghai University, Nantong, Jiangsu 226011, China
- Cardiac Regeneration and Ageing Lab, Institute of Cardiovascular Sciences, Shanghai Engineering Research Center of Organ Repair, School of Life Science, Shanghai University, Shanghai 200444, China
| | - Junjie Xiao
- Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong) and School of Life Sciences, Shanghai University, Nantong, Jiangsu 226011, China
- Cardiac Regeneration and Ageing Lab, Institute of Cardiovascular Sciences, Shanghai Engineering Research Center of Organ Repair, School of Life Science, Shanghai University, Shanghai 200444, China
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Xu Z, Guan C, Cheng Z, Zhou H, Qin W, Feng J, Wan M, Zhang Y, Jia C, Shao S, Guo H, Li S, Liu B. Research trends and hotspots of circular RNA in cardiovascular disease: A bibliometric analysis. Noncoding RNA Res 2024; 9:930-944. [PMID: 38680417 PMCID: PMC11047193 DOI: 10.1016/j.ncrna.2024.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 04/03/2024] [Accepted: 04/16/2024] [Indexed: 05/01/2024] Open
Abstract
From a global perspective, cardiovascular diseases (CVDs), the leading factor accounting for population mortality, and circRNAs, RNA molecules with stable closed-loop structures, have been proven to be closely related. The latent clinical value and the potential role of circRNAs in CVDs have been attracting increasing, active research interest, but bibliometric studies in this field are still lacking. Thus, in this study, we conducted a bibliometric analysis by using software such as VOSviewer, CiteSpace, Microsoft Excel, and the R package to determine the current research progress and hotspots and ultimately provide an overview of the development trends and future frontiers in this field. In our study, based on our search strategy, a total of 1206 publications published before July 31, 2023 were accessed from the WOSCC database. According to our findings, there is a notable increasing trend in global publications in the field of circRNA in CVDs. China was found to be the dominant country in terms of publication number, but a lack of high-quality articles was a significant fault. A cluster analysis on the co-cited references indicated that dilated cardiomyopathy, AMI, and cardiac hypertrophy are the greatest objects of concern. In contrast, a keywords analysis indicated that high importance has been ascribed to MI, abdominal aortic aneurysm, cell proliferation, and coronary artery diseases.
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Affiliation(s)
- Zehui Xu
- Department of Anatomy, College of Chinese Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Chong Guan
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Ziji Cheng
- Department of Anatomy, College of Chinese Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Houle Zhou
- Department of Anatomy, College of Chinese Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Wanting Qin
- Department of Anatomy, College of Chinese Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
- TCM Regulating Metabolic Diseases Key Laboratory of Sichuan Province, Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, China
| | - Jiaming Feng
- Department of Anatomy, College of Chinese Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Melisandre Wan
- Department of Anatomy, College of Chinese Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Yihan Zhang
- Department of Anatomy, College of Chinese Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Chengyao Jia
- Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Shuijin Shao
- Department of Anatomy, College of Chinese Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Haidong Guo
- Department of Anatomy, College of Chinese Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Shaoling Li
- Department of Pathology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, 200433, China
| | - Baonian Liu
- Department of Anatomy, College of Chinese Integrative Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
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Hussain MS, Moglad E, Bansal P, Kaur H, Deorari M, Almalki WH, Kazmi I, Alzarea SI, Singh M, Kukreti N. Exploring the oncogenic and tumor-suppressive roles of Circ-ADAM9 in cancer. Pathol Res Pract 2024; 256:155257. [PMID: 38537524 DOI: 10.1016/j.prp.2024.155257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 03/05/2024] [Accepted: 03/08/2024] [Indexed: 04/14/2024]
Abstract
Circular RNAs (circRNAs) constitute a recently identified category of closed continuous loop RNA transcripts, serving as a subset of competing endogenous RNAs (ceRNAs) with the capacity to modulate genes by acting as microRNA sponges. In the context of cancer growth, numerous investigations have explored the potential functions of circRNAs, revealing their diverse functions either as oncogenes, promoting cancer progression, or as tumor suppressors, mitigating disease development. Among these, circRNA ADAM9 (Circ-ADAM9) is now recognized as an important player in a variety of mechanisms, both physiological and pathological, especially in cancer. The aberrant expression of Circ-ADAM9 has been observed across multiple human malignancies, implying a significant involvement in tumorigenesis. This comprehensive review aims to synthesize recent findings elucidating the function of Circ-ADAM9 in many malignancies. Additionally, the review explores the possibility of Circ-ADAM9 as a valuable biomarker, offering insights into its prognostic, diagnostic, and therapeutic implications. By summarizing the latest discoveries in this field, the review contributes to our understanding of the multifaceted contribution of Circ-ADAM9 in tumor biology and its potential applications in clinical settings.
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Affiliation(s)
- Md Sadique Hussain
- School of Pharmaceutical Sciences, Jaipur National University, Jagatpura, Jaipur, Rajasthan 302017, India
| | - Ehssan Moglad
- Department of Pharmaceutical Chemistry, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al Kharj 11942, Saudi Arabia
| | - Pooja Bansal
- Department of Biotechnology and Genetics, Jain (Deemed-to-be) University, Bengaluru, Karnataka 560069, India; Department of Allied Healthcare and Sciences, Vivekananda Global University, Jaipur, Rajasthan 303012, India
| | - Harpreet Kaur
- School of Basic & Applied Sciences, Shobhit University, Gangoh, Uttar Pradesh 247341, India; Department of Health & Allied Sciences, Arka Jain University, Jamshedpur, Jharkhand 831001, India
| | - Mahamedha Deorari
- Uttaranchal Institute of Pharmaceutical Sciences, Uttaranchal University, Dehradun, India
| | - Waleed Hassan Almalki
- Department of Pharmacology, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Imran Kazmi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, 21589, Jeddah, Saudi Arabia.
| | - Sami I Alzarea
- Department of Pharmacology, College of Pharmacy, Jouf University, 72341, Sakaka, Aljouf, Saudi Arabia
| | - Mahaveer Singh
- School of Pharmacy and Technology Management, SVKMs, NMIMS University, Shirpur campus, Maharastra 425405, India
| | - Neelima Kukreti
- School of Pharmacy, Graphic Era Hill University, Dehradun 248007, India
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Begliarzade S, Sufianov A, Ilyasova T, Shumadalova A, Sufianov R, Beylerli O, Yan Z. Circular RNA in cervical cancer: Fundamental mechanism and clinical potential. Noncoding RNA Res 2024; 9:116-124. [PMID: 38035041 PMCID: PMC10686810 DOI: 10.1016/j.ncrna.2023.11.009] [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: 10/24/2023] [Revised: 11/15/2023] [Accepted: 11/15/2023] [Indexed: 12/02/2023] Open
Abstract
CC (CC) remains a significant global health concern, imposing a substantial health burden on women worldwide due to its high incidence and mortality rates. To address this issue, there is a need for ongoing research to uncover the underlying molecular mechanisms of CC and to discover novel diagnostic and therapeutic strategies. Recent progress in non-coding RNAs (ncRNAs) has opened new avenues for investigation, and circular RNAs (circRNAs) have emerged as molecules with diverse roles in various cellular processes. These circRNAs are distinct in structure, forming a closed loop, setting them apart from their linear counterparts. They are intricately involved in regulating different aspects of cellular functions, particularly in cell growth and development. Remarkably, circRNAs can have varying functions, either promoting or inhibiting oncogenic processes, depending on the specific cellular context. Recent studies have identified abnormal circRNAs expression patterns associated with CC, indicating their significant involvement in disease development. The differing circRNAs profiles linked to CC present promising opportunities for early detection, precise prognosis evaluation, and personalized treatment strategies. In this comprehensive review, we embark on a detailed exploration of CC-related circRNAs, elucidating their distinct roles and providing insights into the intricate molecular mechanisms governing CC's onset and progression. A growing body of evidence strongly suggests that circRNAs can serve as valuable biomarkers for early CC detection and hold potential as therapeutic targets for intervention. By delving into the complex interplay between circRNAs and CC, we are paving the way for innovative, individualized approaches to combat this serious disease, with the goal of reducing its impact on women's health globally and improving patient outcomes. As our understanding of circRNAs in the context of CC continues to deepen, the outlook for breakthroughs in diagnosis and treatment becomes increasingly promising.
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Affiliation(s)
- Sema Begliarzade
- Department of Oncology, Radiology and Radiotherapy, Tyumen State Medical University, 54 Odesskaya Street, 625023, Tyumen, Russia
| | - Albert Sufianov
- Educational and Scientific Institute of Neurosurgery, Рeoples’ Friendship University of Russia (RUDN University), Moscow, Russia
- Department of Neurosurgery, Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
| | - Tatiana Ilyasova
- Department of Internal Diseases, Bashkir State Medical University, Ufa, Republic of Bashkortostan, 450008, Russia
| | - Alina Shumadalova
- Department of General Chemistry, Bashkir State Medical University, Ufa, Republic of Bashkortostan, 3 Lenin Street, 450008, Russia
| | - Rinat Sufianov
- Department of Neurosurgery, Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia
- Department of Neurooncology, N. N. Blokhin National Medical Research Center of Oncology, Ministry of Health of the Russian Federation, Moscow, Russia
| | - Ozal Beylerli
- Central Research Laboratory, Bashkir State Medical University, Ufa, Republic of Bashkortostan, 3 Lenin Street, 450008, Russia
| | - Zhongrui Yan
- Department of Gynecology, Tianjin Baodi Hospital, Baodi Clinical College of Tianjin Medical University, Tianjin, 301800, China
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Fan M, Liang T, Xie F, Ma P, Li J. Exosomal circ_HIPK3 reduces apoptosis in H2O2-induced AC16 cardiomyocytes through miR-33a-5p/IRS1 axis. Transpl Immunol 2023; 80:101862. [PMID: 37230396 DOI: 10.1016/j.trim.2023.101862] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 04/06/2023] [Accepted: 05/20/2023] [Indexed: 05/27/2023]
Abstract
BACKGROUND Exosomal circular RNAs (circRNAs) has been revealed to participate in the processes of cellular angiogenesis, growth and metastasis. Herein, the goal of this work was to investigate the role of exosomal circ_HIPK3 in cardiomyocyte apoptosis. METHODS Exosomes were isolated using ultracentrifugation method and observed by transmission electron microscopy (TEM). Western blot was used to detect exosomes markers. The experimental group AC16 cells were exposed to hydrogen peroxide (H2O2). Levels of genes and proteins was detected by qRT-PCR and Western blot. EdU assay, CCK8 assay, flow cytometry, and Western blot were utilized to detect the function of exosomal circ_HIPK3 in proliferation, and apoptosis. The target relationship between miR-33a-5p and circ_HIPK3 or IRS1 (insulin receptor substrate 1). RESULTS Circ_HIPK3 was packaged into exosomes and derived from AC16 cells. The expression of circ_HIPK3 was decreased by H2O2 treatment in AC16 cells, which also led to the decrease of circ_HIPK3 in exosomes. Functional analysis showed exosomal circ_HIPK3 promoted AC16 cell proliferation and reduced cell apoptosis under H2O2 treatment. Mechanistically, circ_HIPK3 acted as a sponge of miR-33a-5p to up-regulate the expression of its target IRS1. Functionally, forced expression of miR-33a-5p reversed the reduction of exosomal circ_HIPK3 in apoptosis of H2O2-stimulated AC16 cells. Moreover, miR-33a-5p inhibition contributed to the proliferation of H2O2-stimulated AC16 cells, which was abolished by IRS1 silencing. CONCLUSION Exosomal circ_HIPK3 reduced H2O2-induced AC16 cardiomyocyte apoptosis through miR-33a-5p/IRS1 axis, suggesting a novel insight into the pathology of myocardial infarction.
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Affiliation(s)
- Ming Fan
- Department of Cardiovascular Surgery, 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Ting Liang
- Department of Ophthalmology, 4th Affiliated Hospital of Harbin Medical University, Harbin City, Heilongjiang Province, China
| | - Fei Xie
- Department of Cardiovascular Surgery, 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Pingwei Ma
- Department of Cardiovascular Surgery, 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Junquan Li
- Department of Cardiovascular Surgery, 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China.
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Dergunova LV, Vinogradina MA, Filippenkov IB, Limborska SA, Dergunov AD. Circular RNAs Variously Participate in Coronary Atherogenesis. Curr Issues Mol Biol 2023; 45:6682-6700. [PMID: 37623241 PMCID: PMC10453518 DOI: 10.3390/cimb45080422] [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: 06/29/2023] [Revised: 08/03/2023] [Accepted: 08/11/2023] [Indexed: 08/26/2023] Open
Abstract
Over the past decade, numerous studies have shown that circular RNAs (circRNAs) play a significant role in coronary artery atherogenesis and other cardiovascular diseases. They belong to the class of non-coding RNAs and arise as a result of non-canonical splicing of premature RNA, which results in the formation of closed single-stranded circRNA molecules that lack 5'-end caps and 3'-end poly(A) tails. circRNAs have broad post-transcriptional regulatory activity. Acting as a sponge for miRNAs, circRNAs compete with mRNAs for binding to miRNAs, acting as competing endogenous RNAs. Numerous circRNAs are involved in the circRNA-miRNA-mRNA regulatory axes associated with the pathogenesis of cardiomyopathy, chronic heart failure, hypertension, atherosclerosis, and coronary artery disease. Recent studies have shown that сirc_0001445, circ_0000345, circ_0093887, сircSmoc1-2, and circ_0003423 are involved in the pathogenesis of coronary artery disease (CAD) with an atheroprotective effect, while circ_0002984, circ_0029589, circ_0124644, circ_0091822, and circ_0050486 possess a proatherogenic effect. With their high resistance to endonucleases, circRNAs are promising diagnostic biomarkers and therapeutic targets. This review aims to provide updated information on the involvement of atherogenesis-related circRNAs in the pathogenesis of CAD. We also discuss the main modern approaches to detecting and studying circRNA-miRNA-mRNA interactions, as well as the prospects for using circRNAs as biomarkers and therapeutic targets for the treatment of cardiovascular diseases.
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Affiliation(s)
- Liudmila V. Dergunova
- Laboratory of Human Molecular Genetics, National Research Center “Kurchatov Institute”, Kurchatov Sq. 2, Moscow 123182, Russia; (M.A.V.); (I.B.F.); (S.A.L.)
| | - Margarita A. Vinogradina
- Laboratory of Human Molecular Genetics, National Research Center “Kurchatov Institute”, Kurchatov Sq. 2, Moscow 123182, Russia; (M.A.V.); (I.B.F.); (S.A.L.)
| | - Ivan B. Filippenkov
- Laboratory of Human Molecular Genetics, National Research Center “Kurchatov Institute”, Kurchatov Sq. 2, Moscow 123182, Russia; (M.A.V.); (I.B.F.); (S.A.L.)
| | - Svetlana A. Limborska
- Laboratory of Human Molecular Genetics, National Research Center “Kurchatov Institute”, Kurchatov Sq. 2, Moscow 123182, Russia; (M.A.V.); (I.B.F.); (S.A.L.)
| | - Alexander D. Dergunov
- Laboratory of Structural Fundamentals of Lipoprotein Metabolism, National Medical Research Center for Therapy and Preventive Medicine, Petroverigsky Street 10, Moscow 101990, Russia;
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7
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Antioxidants Supplementation During Exercise: Friends or Enemies for Cardiovascular Homeostasis? J Cardiovasc Transl Res 2023; 16:51-62. [PMID: 35921051 DOI: 10.1007/s12265-022-10297-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 07/23/2022] [Indexed: 10/16/2022]
Abstract
Exercise is a preferred strategy for improving cardiac function, especially for patients with cardiovascular diseases. Increasing evidence indicates that oxidative stress is involved in exercise-induced cardioprotection, while the underlying mechanism remains unclear. Furthermore, the effect of antioxidant supplementation during or post-exercise still exists despite divergences. To explore the effect of oxidative stress and antioxidant supplementation on cardiovascular homeostasis during or post-exercise, we take insights into the progress of exercise-induced oxidative stress, antioxidant supplementation, and cardiovascular homeostasis. In particular, antioxidants such as vitamin C or E, gamma-oryzanol, and other natural antioxidants are discussed concerning regulating exercise-associated oxidative stress. Additionally, our present study reviewed and discussed a meta-analysis of antioxidant supplementation during exercise. Overall, we take an insight into the essential biological adaptations in response to exercise and the effects of antioxidant supplementation on cardiac function, which aid us in giving recommendations on antioxidant supplementation for exercisers and exercised people. A better understanding of these issues will broaden our knowledge of exercise physiology.
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Joaquim VHA, Pereira NP, Fernandes T, Oliveira EM. Circular RNAs as a Diagnostic and Therapeutic Target in Cardiovascular Diseases. Int J Mol Sci 2023; 24:ijms24032125. [PMID: 36768449 PMCID: PMC9916891 DOI: 10.3390/ijms24032125] [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: 08/18/2022] [Revised: 10/04/2022] [Accepted: 10/07/2022] [Indexed: 01/25/2023] Open
Abstract
Circular RNAs (circRNAs) are a family of noncoding RNAs (ncRNAs) that are endogenous and widely distributed in different species, performing several functions, mainly their association with microRNAs (miRNAs) and RNA-binding proteins. CVDs remain the leading cause of death worldwide; therefore, the development of new therapies and strategies, such as gene therapies or nonpharmacological therapies, with low cost, such as physical exercise, to alleviate these diseases is of extreme importance for society. With increasing evidence of ncRNA participating in the progression of CVDs, several studies have reported these RNAs as promising targets for diagnosis and treatment. There are several studies of CVDs and the role of miRNAs and lncRNAs; however, little is known about the new class of RNAs, called circRNAs, and CVDs. In this mini review, we focus on the mechanisms of circRNAs and CVDs.
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Wei W, Tang M, Wang Q, Li X. Circ_HECW2 regulates ox-LDL-induced dysfunction of cardiovascular endothelial cells by miR-942-5p/TLR4 axis. Clin Hemorheol Microcirc 2022:CH221550. [PMID: 36213989 DOI: 10.3233/ch-221550] [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: 11/15/2022]
Abstract
BACKGROUND Coronary artery disease (CAD) is a common coronary artery disease. The functional mechanism of circular RNA (circRNA) HECT, C2 and WW domain containing E3 ubiquitin protein ligase 2 (circ_HECW2, hsa_circ_0057583) in ox-LDL-treated human cardiac microvascular endothelial cells (hCMECs) is still unclear. METHODS Expression levels of circ_HECW2, microRNA (miR)-942-5p, and toll-like receptor 4 (TLR4) were analyzed by quantitative real-time PCR (qRT-PCR) and western blot assays. Cell proliferation and apoptosis were analyzed by 5-ethynyl-2'-deoxyuridine (EdU) assay, cell counting kit-8 (CCK8) assay, and flow cytometry, respectively. Tube formation assay was performed to analyze the angiogenesis of cells. Luciferase reporter and RNA pull-down assays were performed to analyze the target relationship among circ_HECW2, miR-942-5p and TLR4. RESULTS Circ_HECW2 and TLR4 expression levels were up-regulated and miR-942-5p expression was decreased in the serum of CAD patients and oxidized low-density lipoprotein (ox-LDL)-induced hCMECs. Knockdown of circ_HECW2 enhanced cell proliferation and inhibited cell apoptosis in ox-LDL-treated hCMECs. MiR-942-5p was the target of circ_HECW2 and directly targeted TLR4. Moreover, the effect of circ_HECW2 knockdown could be weakened by anti-miR-942-5p, and TLR4 could restore the function of miR-942-5p on cell damage of ox-LDL-induced hCMECs. CONCLUSION Circ_HECW2 could regulate ox-LDL-induced cardiovascular endothelial cell dysfunction through targeting miR-942-5p/TLR4 axis.
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Affiliation(s)
- Wenbo Wei
- Department of Cardiology, Nanjing Jiangning Hospital of Traditional Chinese Medicine, Nanjing City, Jiangsu, China
| | - Min Tang
- Department of Cardiology, Nanjing Tongren Hospital Affiliated to Southeast University School of Medicine, Nanjing City, Jiangsu, China
| | - Qi Wang
- Department of Cardiology, Nanjing Tongren Hospital Affiliated to Southeast University School of Medicine, Nanjing City, Jiangsu, China
| | - Xiaoming Li
- Emergency Department, Ben Q Hospital Affiliated to Nanjing Medical University, Nanjing City, Jiangsu, China
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Hu X, Qin H, Yan Y, Wu W, Gong S, Wang L, Jiang R, Zhao Q, Sun Y, Wang Q, Wang S, Zhao H, Liu J, Yuan P. Exosomal circular RNAs: Biogenesis, effect, and application in cardiovascular diseases. Front Cell Dev Biol 2022; 10:948256. [PMID: 36016651 PMCID: PMC9395648 DOI: 10.3389/fcell.2022.948256] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 07/13/2022] [Indexed: 11/13/2022] Open
Abstract
As natural nanoparticles, exosomes regulate a wide range of biological processes via modulation of its components, including circular RNAs (circRNAs). CircRNAs are a novel class of closed-loop single-stranded RNAs with a wide distribution, and play diverse biological roles. Due to its stability in exosomes, exosomal circRNAs serve as biomarkers, pathogenic regulators and exert therapeutic potentials in some cardiovascular diseases, including atherosclerosis, acute coronary syndrome, ischemia/reperfusion injury, heart failure, and peripheral artery disease. In this review, we detailed the current knowledge on the biogenesis and functions of exosomes, circRNAs, and exosomal circRNAs, as well as their involvement in these cardiovascular diseases, providing novel insights into the diagnosis and treatment of these diseases.
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Affiliation(s)
- Xiaoyi Hu
- Department of Cardio-Pulmonary Circulation, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Hongran Qin
- Department of Nuclear Radiation, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yi Yan
- Heart Center and Shanghai Institute of Pediatric Congenital Heart Disease, Shanghai Children’s Medical Center, National Children’s Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Wenhui Wu
- Department of Cardio-Pulmonary Circulation, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Sugang Gong
- Department of Cardio-Pulmonary Circulation, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Lan Wang
- Department of Cardio-Pulmonary Circulation, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Rong Jiang
- Department of Cardio-Pulmonary Circulation, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Qinhua Zhao
- Department of Cardio-Pulmonary Circulation, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yuanyuan Sun
- Department of Cardio-Pulmonary Circulation, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Qian Wang
- Department of Cardio-Pulmonary Circulation, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
- Institute of Bismuth Science, University of Shanghai for Science and Technology, Shanghai, China
| | - Shang Wang
- Department of Cardio-Pulmonary Circulation, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Hui Zhao
- Department of Cardio-Pulmonary Circulation, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
- Institute of Bismuth Science, University of Shanghai for Science and Technology, Shanghai, China
| | - Jinming Liu
- Department of Cardio-Pulmonary Circulation, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
- *Correspondence: Jinming Liu, ; Ping Yuan,
| | - Ping Yuan
- Department of Cardio-Pulmonary Circulation, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
- *Correspondence: Jinming Liu, ; Ping Yuan,
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11
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circ-CCND1 regulates the CCND1/P53/P21 pathway through sponging miR-138-5p in valve interstitial cells to aggravate aortic valve calcification. J Physiol Biochem 2022; 78:845-854. [PMID: 35776289 DOI: 10.1007/s13105-022-00907-3] [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: 08/26/2021] [Accepted: 06/20/2022] [Indexed: 10/17/2022]
Abstract
To discuss the effect and mechanism of circular-CCND1 (circ-CCND1) on the regulation of calcified aortic valve disease (CAVD). Differentially expressed circRNAs were screened through the GSE155119 data set and biological prediction. Subsequently, the miR-138-5p, CCND1, and circ-CCND1 expression were detected in the non-calcified and calcified aortic valve. Then Pearson correlation analysis was performed to analyze the correlation between the above expression, and dual luciferase and RNA-pull down assays for verifying the target relationship. Porcine aortic valve interstitial cells (AVICs) were isolated and transfected with pcDNA-circ-CCND1, miR-138-5p inhibitor, and miR-138-5p mimics. The alkaline phosphatase (ALP) activity was quantitatively analyzed by ALP staining, and alizarin-red staining was to check the calcium nodules formation. Finally, Western blot was applied to detect the expression of proteins associated with osteogenic differentiation (Runx2, Osterix, OPN) and CCND1/P53/P21 pathway proteins. Circ-CCND1 was highly expressed in calcific aortic valves. After inhibiting circ-CCND1 expression, a significant reduction was shown in ALP activity, the degree of ossification and the formation of calcium nodules in AVICs, and osteogenic differentiation-related protein expression and CCND1/P53/P21 pathway protein expression. By contrast, inhibition of miR-138-5p and circ-CCND1 together promoted the calcification of AVICs and expression of CCND1/P53/P21 pathway proteins. P53 inhibitor (PFT-α) could significantly reduce activation of CCND1/P53/P21 pathway protein expression by circ-CCND1 overexpression. However, P53 activator (Nutlin-3) significantly restored the suppression of the above pathway-related protein expression by downregulation of circ-CCND1. Circ-CCND1 sponges miR-138-5p to regulate CCND1 expression, thereby promoting the calcification of AVICs.
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Gao F, Li J, Liang S, Wei L, He X, Liu S, Cheng X, Shi K, Jiang H, Chen L. Emerging roles of circRNAs in mice kidney with aging. Microsc Res Tech 2022; 85:2984-2996. [PMID: 35656876 DOI: 10.1002/jemt.24147] [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: 02/23/2022] [Revised: 04/22/2022] [Accepted: 04/25/2022] [Indexed: 11/06/2022]
Abstract
Circular RNA (circRNA) is a novel type of noncoding RNA expressed in different tissues and species. Up to now, little is known of the function and expression of circRNAs in kidney aging. In this research, we used RNA sequencing to identify 11,929 circRNAs in kidney from 3-, 12-, and 24-month-old mice, of which 12 circRNAs were validated by qPCR. Based on the validated circRNAs and their predicted miRNA-mRNA target pairs, a circRNA-miRNA-mRNA interactions network was conducted. Bioinformatics analysis for all the mRNAs in the ceRNA network showed that the most enriched gene ontology (GO) term and one of the most enriched Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways were associated with endoplasmic reticulum (ER). The network also identified circNpas2, which was decreased significantly in mice kidney during aging, as a hub gene. Subsequently, we found that the cell cycle was arrested in G1 phase and the expression of P53 and P16 increased significantly in the circNpas2-knockdown cells. Moreover, knockdown of circNpas2 inhibited expression of ER-related proteins, HSPA5 and ERO1L. Taken together, our findings contribute to a better understanding of the role played by circRNA during kidney aging and provide potential therapeutic targets for the prevention of kidney aging.
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Affiliation(s)
- Fanfan Gao
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Jie Li
- Dialysis Department of Nephrology Hospital, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Shanshan Liang
- Blood Transfusion Department, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Limin Wei
- Dialysis Department of Nephrology Hospital, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Xin He
- Dialysis Department of Nephrology Hospital, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Sixiu Liu
- Dialysis Department of Nephrology Hospital, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Xin Cheng
- Dialysis Department of Nephrology Hospital, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Kehui Shi
- Dialysis Department of Nephrology Hospital, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Hongli Jiang
- Dialysis Department of Nephrology Hospital, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Lei Chen
- Dialysis Department of Nephrology Hospital, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
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Guo J, Chen LW, Huang ZQ, Guo JS, Li H, Shan Y, Chen ZR, Yan YM, Zhu JN, Guo HM, Fang XH, Shan ZX. Suppression of the Inhibitory Effect of circ_0036176-Translated Myo9a-208 on Cardiac Fibroblast Proliferation by miR-218-5p. J Cardiovasc Transl Res 2022; 15:548-559. [PMID: 35288823 DOI: 10.1007/s12265-022-10228-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 02/23/2022] [Indexed: 02/07/2023]
Abstract
Increasing evidence has shown that circular RNAs (circRNAs) participate in the process of cardiac remodeling. CircRNA circ_0036176 originating from the back-splicing of exon 2 to exon4 of myosin IXA (Myo9a) gene was shown to be increased in the myocardium of patients with heart failure (HF) and riched in exosomes from human AC16 cardiomyocytes with overexpression of circ_0036176. Proliferation activity was inhibited in mCFs subjected to exosomal circ_0036176 treatment and in mCFs with overexpression of circ_0036176. Interestingly, circ_0036176 contains an IRES element and an ORF of 627 nt encoding a 208-amino acid protein (termed as Myo9a-208). Myo9a-208 was shown to mediate the inhibitory effect of circ_0036176 on CFs proliferation, and miR-218-5p could inhibit Myo9a-208 expression by binding to circ_0036176, resulting in abolishing the effect of circ_0036176 on inactivating cyclin/Rb signal and suppressing CFs proliferation. Our findings suggest that circ_0036176 inhibits mCFs proliferation by translating Myo9a-208 protein to suppress cyclin/Rb pathway.
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Affiliation(s)
- Jing Guo
- Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China.,School of Medicine, South China University of Technology, Guangzhou, 510632, China
| | - Li-Wen Chen
- Guangdong Cardiovascular Institute, Guangzhou, 510080, China
| | - Zhi-Qi Huang
- School of Bioscience and Bioengineering, South China University of Technology, Guangzhou, 510632, China
| | - Ji-Shen Guo
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, 510280, China
| | - Hui Li
- Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China
| | - Yue Shan
- Guangzhou Foreign Language School, Guangzhou, 511455, China
| | - Ze-Run Chen
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, 510280, China
| | - Yu-Min Yan
- Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China
| | - Jie-Ning Zhu
- Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China
| | - Hui-Ming Guo
- Guangdong Cardiovascular Institute, Guangzhou, 510080, China
| | - Xian-Hong Fang
- Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China.
| | - Zhi-Xin Shan
- Guangdong Provincial Key Laboratory of Clinical Pharmacology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, 510080, China. .,Guangdong Cardiovascular Institute, Guangzhou, 510080, China.
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The Preventive Effect of Cardiac Sympathetic Denervation Induced by 6-OHDA on Myocardial Ischemia-Reperfusion Injury: The Changes of lncRNA/circRNAs-miRNA-mRNA Network of the Upper Thoracic Spinal Cord in Rats. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:2492286. [PMID: 34880964 PMCID: PMC8648479 DOI: 10.1155/2021/2492286] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Accepted: 09/13/2021] [Indexed: 02/07/2023]
Abstract
In this study, we investigated whether chemical 6-hydroxydopamine (6-OHDA) stimuli caused cardiac sympathetic denervation (SD), and we analyzed gene expression profiles to determine the changes in the lncRNA/circRNAs-miRNA-mRNA network in the affected spinal cord segments to identify putative target genes and molecular pathways in rats with myocardial ischemia–reperfusion injury (MIRI). Our results showed that cardiac sympathetic denervation induced by 6-OHDA alleviated MIRI. Compared with the ischemia reperfusion (IR, MIRI model) group, there were 148 upregulated and 51 downregulated mRNAs, 165 upregulated and 168 downregulated lncRNAs, 70 upregulated and 52 downregulated circRNAs, and 12 upregulated and 11 downregulated miRNAs in the upper thoracic spinal cord of the SD-IR group. Furthermore, we found that the differential genes related to cellular components were mainly enriched in extracellular and cortical cytoskeleton, and molecular functions were mainly enriched in chemokine activity. Pathway analysis showed that the differentially expressed genes were mainly related to the interaction of cytokines and cytokine receptors, sodium ion reabsorption, cysteine and methionine metabolism, mucoglycan biosynthesis, cGMP-PKG signaling pathway, and MAPK signaling pathway. In conclusion, the lncRNA/circRNAs-miRNA-mRNA networks in the upper thoracic spinal cord play an important role in the preventive effect of cardiac sympathetic denervation induced by 6-OHDA on MIRI, which offers new insights into the pathogenesis of MIRI and provides new targets for MIRI.
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Xi SJ, Cai WQ, Wang QQ, Peng XC. Role of circular RNAs in gastrointestinal tumors and drug resistance. World J Clin Cases 2021; 9:10400-10417. [PMID: 35004973 PMCID: PMC8686142 DOI: 10.12998/wjcc.v9.i34.10400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Revised: 03/26/2021] [Accepted: 08/05/2021] [Indexed: 02/06/2023] Open
Abstract
The incidence of gastrointestinal cancers has increased significantly over the past decade and gastrointestinal malignancies now rank among the leading causes of mortality globally. Although newer therapeutic strategies such as targeted therapies have greatly improved patient outcomes, their clinical success is limited by drug resistance, treatment failure and recurrence of metastatic disease. Therefore, there is an urgent need for further research identifying accurate and reliable biomarkers for precise treatment strategies. Circular RNAs (circRNAs) exhibit a covalently closed structure, high stability and biological conservation, and their expression is associated with the occurrence and development of gastrointestinal tumors. Moreover, circRNAs may significantly influence drug resistance of gastrointestinal cancers. In this article, we review the role of circRNAs in the occurrence and development of gastrointestinal cancer, their association with drug resistance, and potential application for early diagnosis, treatment and prognosis in gastrointestinal malignancies. Furthermore, we summarize characteristics of circRNA, including mechanism of formation and biological effects via mRNA sponging, chromatin replication, gene regulation, translational modification, signal transduction, and damage repair. Finally, we discuss whether circRNA-related noninvasive testing may be clinically provided in the future. This review provides new insights for the future development of diagnostics and therapeutics based on circRNAs in gastrointestinal tumors.
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Affiliation(s)
- Shi-Jun Xi
- Department of Pathophysiology, School of Basic Medicine, Health Science Center, Yangtze University, Jingzhou 434023, Hubei Province, China
| | - Wen-Qi Cai
- Department of Pathophysiology, School of Basic Medicine, Health Science Center, Yangtze University, Jingzhou 434023, Hubei Province, China
| | - Qin-Qi Wang
- Department of Pathophysiology, School of Basic Medicine, Health Science Center, Yangtze University, Jingzhou 434023, Hubei Province, China
| | - Xiao-Chun Peng
- Department of Pathophysiology, School of Basic Medicine, Health Science Center, Yangtze University, Jingzhou 434023, Hubei Province, China
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Lai S, Chen L, Zhan P, Lin G, Lin H, Huang H, Chen Q. Circular RNA Expression Profiles and Bioinformatic Analysis in Mouse Models of Obstructive Sleep Apnea-Induced Cardiac Injury: Novel Insights Into Pathogenesis. Front Cell Dev Biol 2021; 9:767283. [PMID: 34820383 PMCID: PMC8606653 DOI: 10.3389/fcell.2021.767283] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 10/25/2021] [Indexed: 01/22/2023] Open
Abstract
Circular RNAs (circRNAs) participate in the development of various kinds of diseases. However, the function and roles of circRNAs in obstructive sleep apnea (OSA)-induced cardiovascular disease remain poorly understood. Therefore, we sought to explore the circRNA expression profiles and predict their functions in OSA-induced cardiac injury with the use of bioinformatics analysis. The model of OSA was established in mouse treated by chronic intermittent hypoxia (CIH) exposure. Then, we screened the circRNA profile using circRNA microarray. By comparing circRNA expression in three matched pairs of CIH-treated cardiac tissues and controls, differentially expressed circRNAs were identified in the CIH groups. Comparison of the selected circRNAs expression levels was performed between qRT-PCR and microarray. Meanwhile, we employed Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses to predict the functions of these selected circRNAs. Finally, we constructed a circRNA-miRNA-mRNA network based on the target prediction. It was found that a total of 124 circRNAs were differentially expressed in CIH-treated cardiac tissues (p ≤ 0.05, fold-change ≥ 1.5). Among them, 23 circRNAs were significantly down-regulated, and the other 101 were up-regulated. Then, ten circRNAs were randomly selected to validate the reliability of the microarray results by using qRT-PCR. Next, we conducted the GO and KEGG pathway analysis to explore the parental genes functions of differentially expressed circRNA. Finally, two significantly differentially expressed circRNAs (mmu_circRNA_014309 and mmu_circRNA_21856) were further selected to create a circRNA-miRNA-mRNA regulation network. Our study did first reveal that the differentially expressed circRNAs played a vital role in the pathogenesis of OSA-induced cardiac damage. Thus, our findings bring us closer to unraveling the pathophysiologic mechanisms and eliciting novel therapeutic targets for the treatment of OSA-associated cardiovascular diseases.
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Affiliation(s)
- Suxian Lai
- Department of Neonatology, The First Hospital of Quanzhou Affiliated to Fujian Medical University, Quanzhou, China
| | - Lijun Chen
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Pingyun Zhan
- Department of Cardiology, Haidu Hospital, Quanzhou, China
| | - Guofu Lin
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Hai Lin
- Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Huibin Huang
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
| | - Qingshi Chen
- Department of Endocrinology and Metabolism, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
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Circ_UBR4 knockdown alleviates oxidized low-density lipoprotein-provoked growth and migration of human vascular smooth muscle cells by acting on the miR-637/FOXO4 pathway. J Cardiovasc Pharmacol 2021; 78:534-543. [PMID: 34225339 DOI: 10.1097/fjc.0000000000001098] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 06/12/2021] [Indexed: 11/27/2022]
Abstract
ABSTRACT Excessive proliferation and migration of human vascular smooth muscle cells (HVSMCs) induced by oxidized low-density lipoprotein (ox-LDL) are important pathological features of atherosclerosis (AS). Emerging evidence indicates that circular RNAs (circRNAs) deregulation is involved in this pathological process. The objective of this study was to explore the role of circRNA ubiquitin protein ligase E3 component n-recognin 4 (circ_UBR4) in ox-LDL-treated HVSMCs. The expression of circ_UBR4, microRNA-637 (miR-637) and forkhead box O4 (FOXO4) mRNA was detected by quantitative real-time PCR (qPCR). Cell cycle progression was examined by flow cytometry assay. Cell viability was examined by MTT assay. Cell migration was examined by transwell assay. The protein levels of proliferating cell nuclear antigen (PCNA), matrix metalloproteinase 2 (MMP2) and FOXO4 were measured by western blot. The relationship between miR-637 and circ_UBR4 or FOXO4 was confirmed by dual-luciferase reporter assay. The results presented that the expression of circ_UBR4 was increased in AS serum samples and ox-LDL-treated HVSMCs. Cell cycle progression, cell proliferation and cell migration were promoted by ox-LDL, while circ_UBR4 knockdown inhibited HVSMCs proliferation and migration. MiR-637 was a target of circ_UBR4, and FOXO4 was a target of miR-637. Circ_UBR4 positively regulated FOXO4 expression by targeting miR-637. Circ_UBR4 knockdown-inhibited HVSMCs proliferation and migration were recovered by miR-637 inhibition, and miR-637 restoration-inhibited HVSMCs proliferation and migration were recovered by FOXO4 overexpression. In conclusion, circ_UBR4 knockdown inhibited ox-LDL-induced excessive proliferation and migration of HVSMCs by regulating FOXO4 via targeting miR-637.
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Brozzi F, Regazzi R. Circular RNAs as Novel Regulators of β-Cell Functions under Physiological and Pathological Conditions. Int J Mol Sci 2021; 22:ijms22041503. [PMID: 33546109 PMCID: PMC7913224 DOI: 10.3390/ijms22041503] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 01/29/2021] [Accepted: 01/30/2021] [Indexed: 12/11/2022] Open
Abstract
Circular RNAs (circRNAs) constitute a large class of non-coding RNAs characterized by a covalently closed circular structure. They originate during mRNA maturation through a modification of the splicing process and, according to the included sequences, are classified as Exonic, Intronic, or Exonic-Intronic. CircRNAs can act by sequestering microRNAs, by regulating the activity of specific proteins, and/or by being translated in functional peptides. There is emerging evidence indicating that dysregulation of circRNA expression is associated with pathological conditions, including cancer, neurological disorders, cardiovascular diseases, and diabetes. The aim of this review is to provide a comprehensive and updated view of the most abundant circRNAs expressed in pancreatic islet cells, some of which originating from key genes controlling the differentiation and the activity of insulin-secreting cells or from diabetes susceptibility genes. We will particularly focus on the role of a group of circRNAs that contribute to the regulation of β-cell functions and that display altered expression in the islets of rodent diabetes models and of type 2 diabetic patients. We will also provide an outlook of the unanswered questions regarding circRNA biology and discuss the potential role of circRNAs as biomarkers for β-cell demise and diabetes development.
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Affiliation(s)
- Flora Brozzi
- Department of Fundamental Neurosciences, University of Lausanne, 1005 Lausanne, Switzerland;
| | - Romano Regazzi
- Department of Fundamental Neurosciences, University of Lausanne, 1005 Lausanne, Switzerland;
- Department of Biomedical Sciences, University of Lausanne, 1005 Lausanne, Switzerland
- Correspondence: ; Tel.: +41-21-692-52-80 or +41-21-692-52-55
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