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Belete MA, Tadesse S, Tilahun M, Gedefie A, Shibabaw A, Mulatie Z, Wudu MA, Gebremichael S, Debash H, Alebachew M, Alemayehu E. Long noncoding RNAs and circular RNAs as potential diagnostic biomarkers of inflammatory bowel diseases: a systematic review and meta-analysis. Front Immunol 2024; 15:1362437. [PMID: 38524131 PMCID: PMC10957631 DOI: 10.3389/fimmu.2024.1362437] [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: 12/28/2023] [Accepted: 02/27/2024] [Indexed: 03/26/2024] Open
Abstract
Introduction Inflammatory bowel disease (IBD) poses a growing global burden, necessitating the discovery of reliable biomarkers for early diagnosis. The clinical significance of dysregulated expression of long noncoding RNAs (lncRNAs) and circular RNAs (circRNAs) in diagnosing IBD has not been well established. Thus, our study aimed to investigate the diagnostic value of lncRNAs and circRNAs for IBD based on currently available studies. Methods A comprehensive search was carried out in diverse electronic databases, such as PubMed, Embase, Scopus, Science Direct and Wiley Online Library to retrieve articles published until October 30, 2023. Stata 17.0 software was employed to determine pooled sensitivity, specificity, positive likelihood ratio (PLR), negative likelihood ratio (NLR), diagnostic ratio (DOR), and area under the curve (AUC). Heterogeneity, subgroup analysis, and meta-regression were explored, and publication bias was assessed using Deeks' funnel plot. Fagan's nomogram and likelihood ratio scattergram were employed to evaluate the clinical validity. Result A total of 11 articles encompassing 21 studies which involved 1239 IBD patients and 985 healthy controls were investigated. The findings revealed lncRNAs exhibit high level of pooled sensitivity 0.94 (95% CI: 0.87-0.97) and specificity 0.99 (95% CI: 0.89-1.00), along with PLR, NLR, DOR, and AUC values of 64.25 (95% CI: 7.39-558.66), 0.06 (95% CI: 0.03-0.13), 1055.25 (95% CI: 70.61-15770.77), and 0.99 (95% CI: 0.97-0.99), respectively. Conversely, CircRNAs showed moderate accuracy in IBD diagnosis, with sensitivity of 0.68 (95% CI: 0.61-0.73), specificity of 0.73 (95% CI: 0.65-0.79), PLR of 2.47 (95% CI: 1.94-3.16), NLR of 0.45 (95% CI: 0.38-0.53), DOR of 5.54 (95% CI: 3.88-7.93), and AUC value of 0.75 (95% CI: 0.71-0.79). Moreover, findings from subgroup analysis depicted heightened diagnostic efficacy when employing lncRNA H19 and a large sample size (≥100), with notable efficacy in diagnosing both ulcerative colitis (UC) and Crohn's disease (CD). Conclusion LncRNAs exhibit high diagnostic accuracy in distinguishing patients with IBD from healthy controls signifying their possible use as potential biomarkers, while circRNAs showed moderate diagnostic accuracy. Nevertheless, to validate our findings and confirm the clinical utility of lncRNAs and circRNAs in IBD diagnosis, a large pool of prospective and multi-center studies should be undertaken. Systematic review registration https://www.crd.york.ac.uk/PROSPERO, identifier CRD42023491840.
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Affiliation(s)
- Melaku Ashagrie Belete
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Selamyhun Tadesse
- Department of Medical Laboratory Science, College of Health Sciences, Woldia University, Woldia, Ethiopia
| | - Mihret Tilahun
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Alemu Gedefie
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Agumas Shibabaw
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Zewudu Mulatie
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Muluken Amare Wudu
- Department of Pediatric and Child Health Nursing, School of Nursing and Midwifery, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Saba Gebremichael
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Habtu Debash
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Mihreteab Alebachew
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
| | - Ermiyas Alemayehu
- Department of Medical Laboratory Sciences, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia
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Kazmi I, Altamimi ASA, Afzal M, Majami AA, Abbasi FA, Almalki WH, Alzera SI, Kukreti N, Fuloria NK, Fuloria S, Sekar M, Abida. Non-coding RNAs: Emerging biomarkers and therapeutic targets in ulcerative colitis. Pathol Res Pract 2024; 253:155037. [PMID: 38160482 DOI: 10.1016/j.prp.2023.155037] [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: 11/18/2023] [Revised: 12/10/2023] [Accepted: 12/11/2023] [Indexed: 01/03/2024]
Abstract
Ulcerative colitis (UC) is a persistent inflammatory condition affecting the colon's mucosal lining, leading to chronic bowel inflammation. Despite extensive research, the precise molecular mechanisms underlying UC pathogenesis remain elusive. NcRNAs form a category of functional RNA molecules devoid of protein-coding capacity. They have recently surfaced as pivotal modulators of gene expression and integral participants in various pathological processes, particularly those related to inflammatory disorders. The diverse classes of ncRNAs, encompassing miRNAs, circRNAs, and lncRNAs, have been implicated in UC. It highlights their involvement in key UC-related processes, such as immune cell activation, epithelial barrier integrity, and the production of pro-inflammatory mediators. ncRNAs have been identified as potential biomarkers for UC diagnosis and monitoring disease progression, offering promising avenues for personalized medicine. This approach may pave the way for novel, more specific treatments with reduced side effects, addressing the current limitations of conventional therapies. A comprehensive understanding of the interplay between ncRNAs and UC will advance our knowledge of the disease, potentially leading to more effective and personalized treatments for patients suffering from this debilitating condition. This review explores the pivotal role of ncRNAs in the context of UC, shedding light on their possible targets for diagnosis, prognosis, and therapeutic interventions.
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Affiliation(s)
- Imran Kazmi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | | | - Muhammad Afzal
- Department of Pharmaceutical Sciences, Pharmacy Program, Batterjee Medical College, P.O. Box 6231, Jeddah 21442, Saudi Arabia
| | - Abdullah A Majami
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Fahad Al Abbasi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Waleed Hassan Almalki
- Department of Pharmacology, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Sami I Alzera
- Department of Pharmacology, College of Pharmacy, Jouf University, Sakaka 72341, Al-Jouf, Saudi Arabia
| | - Neelima Kukreti
- School of Pharmacy, Graphic Era Hill University, Dehradun 248007, India
| | | | - Shivkanya Fuloria
- Faculty of Pharmacy, AIMST University, Bedong 08100, Kedah, Malaysia
| | - Mahendran Sekar
- School of Pharmacy, Monash University Malaysia, Bandar Sunway, Subang Jaya 47500, Selangor, Malaysia
| | - Abida
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Northern Border University, Rafha 91911, Saudi Arabia
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Jiang F, Wu M, Li R. The significance of long non-coding RNAs in the pathogenesis, diagnosis and treatment of inflammatory bowel disease. PRECISION CLINICAL MEDICINE 2023; 6:pbad031. [PMID: 38163004 PMCID: PMC10757071 DOI: 10.1093/pcmedi/pbad031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 12/06/2023] [Indexed: 01/03/2024] Open
Abstract
Inflammatory bowel diseases (IBD) are a group of chronic relapsing gastrointestinal inflammatory diseases with significant global incidence. Although the pathomechanism of IBD has been extensively investigated, several aspects of its pathogenesis remain unclear. Long non-coding RNAs (lncRNAs) are transcripts with more than 200 nucleotides in length that have potential protein-coding functions. LncRNAs play important roles in biological processes such as epigenetic modification, transcriptional regulation and post-transcriptional regulation. In this review, we summarize recent advances in research on IBD-related lncRNAs from the perspective of the overall intestinal microenvironment, as well as their potential roles as immune regulators, diagnostic biomarkers and therapeutic targets or agents for IBD.
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Affiliation(s)
- Fei Jiang
- Jiangsu Province Engineering Research Center of Cardiovascular Drugs Targeting Endothelial Cells, School of Life Sciences, Jiangsu Normal University, Xuzhou 221000, China
- Department of Laboratory Medicine, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221000, China
| | - Min Wu
- Drug Discovery Section, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou 325000, China
- Department of Neurology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Rongpeng Li
- Jiangsu Province Engineering Research Center of Cardiovascular Drugs Targeting Endothelial Cells, School of Life Sciences, Jiangsu Normal University, Xuzhou 221000, China
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Shmuel-Galia L, Humphries F, Vierbuchen T, Jiang Z, Santos N, Johnson J, Shklyar B, Joannas L, Mustone N, Sherman S, Ward D, Houghton J, Baer CE, O'Hara A, Henao-Mejia J, Hoebe K, Fitzgerald KA. The lncRNA HOXA11os regulates mitochondrial function in myeloid cells to maintain intestinal homeostasis. Cell Metab 2023; 35:1441-1456.e9. [PMID: 37494932 DOI: 10.1016/j.cmet.2023.06.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 05/25/2023] [Accepted: 06/29/2023] [Indexed: 07/28/2023]
Abstract
This study reveals a previously uncharacterized mechanism to restrict intestinal inflammation via a regulatory RNA transcribed from a noncoding genomic locus. We identified a novel transcript of the lncRNA HOXA11os specifically expressed in the distal colon that is reduced to undetectable levels in colitis. HOXA11os is localized to mitochondria under basal conditions and interacts with a core subunit of complex 1 of the electron transport chain (ETC) to maintain its activity. Deficiency of HOXA11os in colonic myeloid cells results in complex I deficiency, dysfunctional oxidative phosphorylation (OXPHOS), and the production of mitochondrial reactive oxygen species (mtROS). As a result, HOXA11os-deficient mice develop spontaneous intestinal inflammation and are hypersusceptible to colitis. Collectively, these studies identify a new regulatory axis whereby a lncRNA maintains intestinal homeostasis and restricts inflammation in the colon through the regulation of complex I activity.
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Affiliation(s)
- Liraz Shmuel-Galia
- Division of Innate Immunity, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA.
| | - Fiachra Humphries
- Division of Innate Immunity, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Tim Vierbuchen
- Division of Innate Immunity, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Zhaozhao Jiang
- Division of Innate Immunity, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Nolan Santos
- Division of Innate Immunity, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - John Johnson
- Immunology Discovery, Janssen Research and Development LLC, Spring House, PA 19477, USA
| | - Boris Shklyar
- Bioimaging Unit, Faculty of Natural Sciences, University of Haifa, Haifa, Israel
| | - Leonel Joannas
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Nicholas Mustone
- Division of Innate Immunity, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Shany Sherman
- Department of Dermatology, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA; Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Doyle Ward
- Department of Microbiology and Physiological Systems, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA; Center for Microbiome Research, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - JeanMarie Houghton
- Division of Gastroenterology, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Christina E Baer
- Sanderson Center for Optical Imaging and Department of Microbiology and Physiological Systems, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA
| | - Aisling O'Hara
- Immunology Discovery, Janssen Research and Development LLC, Spring House, PA 19477, USA
| | - Jorge Henao-Mejia
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA; Division of Protective Immunity, Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Kasper Hoebe
- Immunology Discovery, Janssen Research and Development LLC, Spring House, PA 19477, USA
| | - Katherine A Fitzgerald
- Division of Innate Immunity, Department of Medicine, University of Massachusetts Chan Medical School, Worcester, MA 01605, USA.
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Wang H, Teng J, Wang M, Zhang Y, Liu X, Liu Z. Expression and significant roles of the lncRNA NEAT1/miR-493-5p/Rab27A axis in ulcerative colitis. Immun Inflamm Dis 2023; 11:e814. [PMID: 37249278 DOI: 10.1002/iid3.814] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 02/26/2023] [Accepted: 03/05/2023] [Indexed: 05/31/2023] Open
Abstract
BACKGROUND Long noncoding RNAs (lncRNAs) and microRNAs (miRNAs) have been reported to play regulatory roles in ulcerative colitis (UC). In this study, we aimed to determine the specific roles and action mechanism of the nuclear paraspeckle assembly transcript 1 (NEAT1) in UC. METHODS Reverse transcription-quantitative polymerase chain reaction (RT-qPCR) was used to determine the lncRNA NEAT1 and miR-493-5p expression levels in patients with UC and healthy volunteers. We determine the forecast linkage points of NEAT1 and miR-493-5p using Starbase and those of miR-493-5p and Rab27A using TargetScan, and further verified them using a double luciferase gene reporter kit. RT-qPCR and Western blot analysis were used to determine the lncRNA NEAT1, miR-493-5p, and Rab27A expression levels in lipopolysaccharide (LPS)-induced Caco-2 cells. Flow cytometry and cell counting kit-8 were used to assess Caco-2 cell viability. Tumor necrosis factor-α, interleukin (IL)-6, IL-8, and IL-1β levels were determined via an enzyme-linked immunosorbent assay. RESULTS Expression levels of NEAT1 were upregulated and those of miR-493-5p were downregualted in 10 ng/mL LPS-treated Caco-2 cells and patients with UC. Dual-luciferase gene reporter assay revealed that miR-493-5p is linked to NEAT1, and Rab27A is a downstream target of miR-493-5p. Overexpression of miR-493-5p inhibited the apoptosis and inflammation in LPS-treated Caco-2 cells. Moreover, downregulation of lncRNA NEAT1 expression also inhibited the apoptosis and inflammation in LPS-treated Caco-2 cells, which was reversed by Rab27A plasmid cotransfection. CONCLUSION Our results revealed that NEAT1 participates in UC progression by inhibiting miR-493-5p expression.
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Affiliation(s)
- Hecheng Wang
- Department of Clinical Skills Experiment Center, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - Jiadan Teng
- Department of Endoscopy Center, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - Mingtao Wang
- Department of Gastroenterology, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - Yuhang Zhang
- Department of Endoscopy Center, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - Xiaoshuang Liu
- Department of Endoscopy Center, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - Zhuya Liu
- Department of Endoscopy Center, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
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Kumar D, Sahoo SS, Chauss D, Kazemian M, Afzali B. Non-coding RNAs in immunoregulation and autoimmunity: Technological advances and critical limitations. J Autoimmun 2023; 134:102982. [PMID: 36592512 PMCID: PMC9908861 DOI: 10.1016/j.jaut.2022.102982] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 12/11/2022] [Accepted: 12/15/2022] [Indexed: 01/02/2023]
Abstract
Immune cell function is critically dependent on precise control over transcriptional output from the genome. In this respect, integration of environmental signals that regulate gene expression, specifically by transcription factors, enhancer DNA elements, genome topography and non-coding RNAs (ncRNAs), are key components. The first three have been extensively investigated. Even though non-coding RNAs represent the vast majority of cellular RNA species, this class of RNA remains historically understudied. This is partly because of a lag in technological and bioinformatic innovations specifically capable of identifying and accurately measuring their expression. Nevertheless, recent progress in this domain has enabled a profusion of publications identifying novel sub-types of ncRNAs and studies directly addressing the function of ncRNAs in human health and disease. Many ncRNAs, including circular and enhancer RNAs, have now been demonstrated to play key functions in the regulation of immune cells and to show associations with immune-mediated diseases. Some ncRNAs may function as biomarkers of disease, aiding in diagnostics and in estimating response to treatment, while others may play a direct role in the pathogenesis of disease. Importantly, some are relatively stable and are amenable to therapeutic targeting, for example through gene therapy. Here, we provide an overview of ncRNAs and review technological advances that enable their study and hold substantial promise for the future. We provide context-specific examples by examining the associations of ncRNAs with four prototypical human autoimmune diseases, specifically rheumatoid arthritis, psoriasis, inflammatory bowel disease and multiple sclerosis. We anticipate that the utility and mechanistic roles of these ncRNAs in autoimmunity will be further elucidated in the near future.
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Affiliation(s)
- Dhaneshwar Kumar
- Immunoregulation Section, Kidney Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), NIH, Bethesda, MD, USA
| | - Subhransu Sekhar Sahoo
- Departments of Biochemistry and Computer Science, Purdue University, West Lafayette, IN, USA
| | - Daniel Chauss
- Immunoregulation Section, Kidney Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), NIH, Bethesda, MD, USA
| | - Majid Kazemian
- Departments of Biochemistry and Computer Science, Purdue University, West Lafayette, IN, USA
| | - Behdad Afzali
- Immunoregulation Section, Kidney Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), NIH, Bethesda, MD, USA.
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Bagalagel A, Diri R, Noor A, Almasri D, Bakhsh HT, Kutbi HI, Al-Gayyar MMH. Curative effects of fucoidan on acetic acid induced ulcerative colitis in rats via modulating aryl hydrocarbon receptor and phosphodiesterase-4. BMC Complement Med Ther 2022; 22:196. [PMID: 35870906 PMCID: PMC9308347 DOI: 10.1186/s12906-022-03680-4] [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: 04/24/2022] [Accepted: 07/08/2022] [Indexed: 11/10/2022] Open
Abstract
Background Ulcerative colitis (UC) is an inflammatory bowel disease. Fucoidan, sulfated polysaccharide of brown seaweed, demonstrates various pharmacological actions as anti-inflammatory, anti-tumor and anti-bacterial effects. Therefore, we opt to investigate the potential curative effects of fucoidan in experimentally induced UC in rats through modulating aryl hydrocarbon receptor (AhR), phosphodiesterase-4 (PDE4), nuclear factor erythroid 2-related factor 2 (Nrf2) and Heme Oxygenase-1 (HO-1). Methods UC was induced in rats using intracolonic 2 ml of 4% acetic acid. Some rats were treated with 150 mg/kg fucoidan. Samples of colon were used to investigate gene and protein expression of AhR, PDE4, Nrf2, HO-1 and cyclic adenosine monophosphate (cAMP). Sections of colon were stained with hematoxylin/eosin, Alcian blue or immune-stained with anti-PDE4 antibodies. Results Investigation of hematoxylin/eosin stained micro-images of UC rats revealed damaged intestinal glands, severe hemorrhage and inflammatory cell infiltration, while sections stained with Alcian Blue revealed damaged and almost absent intestinal glands. UC results in elevated gene and protein expression of PDE4 associated with reduced gene and protein expression of AhR, IL-22, cAMP, Nrf2 and HO-1. Finally, UC increased the oxidative stress and reduced antioxidant activity in colon tissues. All morphological changes as well as gene and protein expressions were ameliorated by fucoidan. Conclusion Fucoidan could treat UC induced in rats. It restored the normal weight and length of colon associated with morphological improvement as found by examining sections stained with hematoxylin/eosin and Alcian Blue. The curative effects could be explained by enhancing antioxidant activity, reducing the expression of PDE4 and increasing the expression of AhR, IL-22 and cAMP.
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Xu X, Xu Y, Tao X, Liang G. lncRNA Mirt2 upregulates miR-1246 through methylation to suppress LPS-induced lung cell apoptosis. Immun Inflamm Dis 2021; 9:695-701. [PMID: 33943017 PMCID: PMC8342232 DOI: 10.1002/iid3.422] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 03/03/2021] [Accepted: 03/05/2021] [Indexed: 12/14/2022] Open
Abstract
INTRODUCTION Long noncoding RNA Mirt2 has been proven to be a suppressor of lipopolysaccharide (LPS) (a key player in sepsis)-induced inflammation responses. Therefore, Mirt2 may also participate in sepsis. This study was carried out to analyze the interactions between Mirt2 and microRNA-1246 (miR-1246) in sepsis, with a specific focus on sepsis-induced acute lung injury (sepsis-ALI). METHODS Forty sepsis patients (sepsis group; 23 males and 17 females; 40-65 years, 48.6 ± 6.3 years), 40 sepsis patients with acute lung injury (sepsis-ALI group, 23 males and 17 females; 40-65 years, 48.7 ± 6.4 years), and 40 healthy controls (control group, 23 males and 17 females; 40-65 years, 48.6 ± 6.1 years) were included. Mirt2 and miR-1246 expression in plasma samples from these patients were determined by a reverse transcription-quantitative polymerase chain reaction (PCR). Overexpression of Mirt2 and miR-1246 was achieved in human bronchial epithelial cells (HBEpCs) to explore the interaction between them. The effects of Mirt2 overexpression on miR-1246 methylation were analyzed by methylation-specific PCR. Cell apoptosis analysis was performed to analyze the role of Mirt2 and miR-1246 in the apoptosis of HBEpCs. RESULTS Mirt2 expression was downregulated in sepsis and was further downregulated in patients with sepsis-ALI. Mirt2 and miR-1246 found to be positively correlated. Downregulation of Mirt2 and miR-1246 was observed in HBEpCs with LPS treatment. In HBEpCs, Mirt2 overexpression increased miR-1246 expression but decreased its gene methylation. Cell apoptosis analysis showed that Mirt2 and miR-1246 negatively regulated the apoptosis of HBEpCs induced by LPS. In addition, miR-1246 inhibition reduced the inhibitory effects of Mirt2 overexpression on cell apoptosis. CONCLUSIONS Mirt2 may upregulate miR-1246 through methylation to suppress lung cell apoptosis.
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Affiliation(s)
- Xuwen Xu
- Department of Infectious Diseases, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
| | - Yuyuan Xu
- Department of Infectious Diseases, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
| | - Xin Tao
- Department of Infectious Diseases, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
| | - Guangyu Liang
- Department of Infectious Diseases, Nanfang HospitalSouthern Medical UniversityGuangzhouChina
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Meng F, Shuai J, Li G, Weng J, Zeng H. Effect of Down-Regulation of Long-Chain Non-Coding RNAs Myocardial Infarction Associated Transcript 2 Expression on Osteoarthritis Chondrocytes. J BIOMATER TISS ENG 2021. [DOI: 10.1166/jbt.2021.2546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Osteoarthritis (OA) is featured as articular cartilage degradation. LncRNA Mirt2 involves in inflammation, but its role in osteoarthritis is unclear. Our study intends to assess LncRNA Mirt2’s role in OA chondrocytes. The chondrocytes of OA patients (OA group) and healthy controls
(control group) were isolated to measure LncRNA Mirt2 expression by Real time PCR. Chondrocytes were assigned into control group, LPS group, LPS + si-NC group, LPS + Mirt2 siRNA group followed by analysis of LncRNA Mirt2 level by real time PCR, cell proliferation by MTT assay, cell apoptosis
by flow cytometry, expression of COL2A1, MMP13, ADAMTS-5, MEK1/2, Erk1/2 and phosphorylated Erk1/2 by western blot. LncRNA Mirt2 level was increased in OA chondrocytes. Under LPS stim-ulation, Mirt2 expression was significantly increased in chondrocytes and chondrocyte proliferation was decreased,
along with significantly increased apoptosis and upregulated COL2A1, MMP13, ADAMTS-5, MEK1/2 and Erk1/2 and phosphorylated Erk1/2 (P < 0.05). Transfection of Mirt2 siRNA down-regulated its expression in chondrocytes stimulated by LPS, which significantly reversed the above changes
(P < 0.05). LncRNA Mirt2 expression is increased in OA chondrocytes. Downregulation of LncRNA Mirt2 can regulate COL2A1, MMP13 and ADAMTS-5 level via MAPK/ERK signaling pathway, promote OA chondrocytes proliferation and inhibit apoptosis.
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Affiliation(s)
- Fanbin Meng
- Hand and Microsurgery, Peking University Shenzhen Hospital, Shenzhen, Guangdong, 518036, China
| | - Jun Shuai
- Department of Dermatology, Shenzhen Futian Center for Chronic Disease Control, Shenzhen, Guangdong, 518046, China
| | - Guoqing Li
- Department of Bone & Joint Surgery, Peking University Shenzhen Hospital, Shenzhen, Guangdong, 518036, China
| | - Jian Weng
- Department of Bone & Joint Surgery, Peking University Shenzhen Hospital, Shenzhen, Guangdong, 518036, China
| | - Hui Zeng
- Department of Bone & Joint Surgery, Peking University Shenzhen Hospital, Shenzhen, Guangdong, 518036, China
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Tian Y, Wang Y, Li F, Yang J, Xu Y, Ouyang M. LncRNA TUG1 regulates the balance of HuR and miR-29b-3p and inhibits intestinal epithelial cell apoptosis in a mouse model of ulcerative colitis. Hum Cell 2020; 34:37-48. [PMID: 33047284 DOI: 10.1007/s13577-020-00428-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 09/03/2020] [Indexed: 12/19/2022]
Abstract
This study aimed to investigate the role of long non-coding RNA (lncRNA) taurine up-regulated 1 (TUG1) in the development of ulcerative colitis (UC) and to explore the underlying mechanisms. A murine model of UC was induced by dextran sodium sulfate (DSS) exposure. The colonic epithelial YAMC cells were treated with TNF-α to simulate the inflammatory environment of intestinal epithelial cells (IECs). RNA pull-down and RIP assays were performed to analyze the interaction between TUG1 and HuR. Luciferase activity assay was conducted to evaluate the interaction between TUG1 and miR-29b-3p. Cell proliferation was evaluated by MTT assay. Cell apoptosis was assessed by flow cytometry and western blot analysis of apoptosis-related proteins. TUG1 overexpression promoted cell proliferation and inhibited cell apoptosis in the TNF-α-stimulated YAMC cells. The mechanistic analysis showed that TUG1 positively regulated the HuR/c-myc axis via its interaction with HuR, leading to upregulation of c-myc expression; meanwhile, TUG1 negatively regulated the miR-29b-3p/CDK2 signaling via binding to miR-29b-3p, leading to derepression of CDK2 expression. Further animal experiments showed that TUG1 overexpression attenuated UC progression in the DSS-induced UC in mice. Collectively, TUG1 inhibits IEC apoptosis and UC progression by regulating the balance of HuR and miR-29b-3p.
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Affiliation(s)
- Yuxi Tian
- Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Ying Wang
- Department of Gastroenterology, Xiangya Hospital, Central South University, Changsha, No. 87, Xiangya Road, Changsha, Hunan, China
| | - Fujun Li
- Department of Gastroenterology, Xiangya Hospital, Central South University, Changsha, No. 87, Xiangya Road, Changsha, Hunan, China
| | - Junwen Yang
- Department of Gastroenterology, Xiangya Hospital, Central South University, Changsha, No. 87, Xiangya Road, Changsha, Hunan, China
| | - Yan Xu
- Department of Health Care Center, Xiangya Hospital, Central South University, Changsha, No. 87, Xiangya Road, Changsha, Hunan, China.
| | - Miao Ouyang
- Department of Gastroenterology, Xiangya Hospital, Central South University, Changsha, No. 87, Xiangya Road, Changsha, Hunan, China.
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Ghafouri-Fard S, Eghtedarian R, Taheri M. The crucial role of non-coding RNAs in the pathophysiology of inflammatory bowel disease. Biomed Pharmacother 2020; 129:110507. [DOI: 10.1016/j.biopha.2020.110507] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 06/25/2020] [Accepted: 07/02/2020] [Indexed: 02/07/2023] Open
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