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Ye G, Zhang J, Peng J, Zhou Z, Wang W, Yao S. CircSOD2: Disruption of intestinal mucosal barrier function in ulcerative colitis by regulating the miR-378g/Snail1 axis. J Gastroenterol Hepatol 2024; 39:1299-1309. [PMID: 38646884 DOI: 10.1111/jgh.16550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 02/21/2024] [Accepted: 03/09/2024] [Indexed: 04/23/2024]
Abstract
BACKGROUND AND AIM Circular RNA (circRNA) has been found to mediate ulcerative colitis (UC) progression by regulating intestinal mucosal barrier function. However, the role of circSOD2 in UC process and its underlying molecular mechanism still need to be further elucidated. METHODS Lipopolysaccharide (LPS)-induced Caco2 cells were used to mimic UC cell models. CircSOD2, miR-378g, and Snail1 levels were determined by quantitative real-time PCR. Cell viability was detected using MTT assay, and inflammatory cytokine levels were measured using ELISA. The intestinal mucosal barrier function was evaluated by testing transepithelial electrical resistance and fluorescein isothiocyanate (FITC)-dextran permeability. Snail1 and tight junction-related markers (Zo-1 and Claudin2) protein levels were examined using western blot. The interaction between miR-378g and circSOD2 or Snail1 was confirmed by dual-luciferase reporter assay. Dextran sulfate sodium (DSS) was used to induce UC rat models in vivo. RESULTS CircSOD2 was overexpressed in UC patients, and its knockdown significantly increased cell viability, transepithelial electrical resistance, and tight junction-related protein expression, while reduced inflammation cytokine levels and the permeability of FITC-dextran in LPS-induced Caco2 cells. In terms of mechanism, circSOD2 sponged miR-378g to positively regulate Snail1 expression. MiR-378g inhibitor reversed the effect of circSOD2 knockdown on intestinal mucosal barrier injury and Snail1 expression in LPS-induced Caco2 cells. In DSS-induced UC rat models, circSOD2 knockdown also could repair the intestinal mucosal barrier injury through regulating miR-378g/Snail1 axis. CONCLUSION CircSOD2 could destroy intestinal mucosal barrier function in LPS-induced Caco2 cells and DSS-induced UC rats by miR-378g/Snail1 axis.
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Affiliation(s)
- Guannan Ye
- Department of Gastroenterology, The Affiliated Changsha Hospital of Xiangya School of Medicine, Central South University, Changsha, China
| | - Jiayi Zhang
- Department of Gastroenterology, The Affiliated Changsha Hospital of Xiangya School of Medicine, Central South University, Changsha, China
| | - Jin Peng
- Department of Gastroenterology, The Affiliated Changsha Hospital of Xiangya School of Medicine, Central South University, Changsha, China
| | - Zhen Zhou
- Department of Gastroenterology, The Affiliated Changsha Hospital of Xiangya School of Medicine, Central South University, Changsha, China
| | - Weining Wang
- Department of Gastroenterology, The Affiliated Changsha Hospital of Xiangya School of Medicine, Central South University, Changsha, China
| | - Si Yao
- Department of Gastroenterology, The Affiliated Changsha Hospital of Xiangya School of Medicine, Central South University, Changsha, China
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Wang S, Yang Y, Jiang X, Zheng X, Wei Q, Dai W, Zhang X. Nurturing gut health: role of m6A RNA methylation in upholding the intestinal barrier. Cell Death Discov 2024; 10:271. [PMID: 38830900 PMCID: PMC11148167 DOI: 10.1038/s41420-024-02043-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 05/19/2024] [Accepted: 05/22/2024] [Indexed: 06/05/2024] Open
Abstract
The intestinal lumen acts as a critical interface connecting the external environment with the body's internal state. It's essential to prevent the passage of harmful antigens and bacteria while facilitating nutrient and water absorption. The intestinal barriers encompass microbial, mechanical, immunological, and chemical elements, working together to maintain intestinal balance. Numerous studies have associated m6A modification with intestinal homeostasis. This review comprehensively outlines potential mechanisms through which m6A modification could initiate, exacerbate, or sustain barrier damage from an intestinal perspective. The pivotal role of m6A modification in preserving intestinal equilibrium provides new insights, guiding the exploration of m6A modification as a target for optimizing preventive and therapeutic strategies for intestinal homeostasis.
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Affiliation(s)
| | - Yuzhong Yang
- Department of Pathology, Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
| | - Xiaohan Jiang
- Department of Pathology, Liuzhou People's Hospital Affiliated to Guangxi Medical University, Liuzhou, Guangxi, China
| | - Xiang Zheng
- Department of Pathology, Affiliated Hospital of Guilin Medical University, Guilin, Guangxi, China
| | - Qiufang Wei
- Department of Pathology, Liuzhou People's Hospital Affiliated to Guangxi Medical University, Liuzhou, Guangxi, China
| | - Wenbin Dai
- Department of Pathology, Liuzhou People's Hospital Affiliated to Guangxi Medical University, Liuzhou, Guangxi, China.
| | - Xuemei Zhang
- Department of Pathology, Liuzhou People's Hospital Affiliated to Guangxi Medical University, Liuzhou, Guangxi, China.
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Chung HK, Xiao L, Han N, Chen J, Yao V, Cairns CM, Raufman B, Rao JN, Turner DJ, Kozar R, Gorospe M, Wang JY. Circular RNA Cdr1as inhibits proliferation and delays injury-induced regeneration of the intestinal epithelium. JCI Insight 2024; 9:e169716. [PMID: 38227372 PMCID: PMC11143936 DOI: 10.1172/jci.insight.169716] [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: 02/13/2023] [Accepted: 01/11/2024] [Indexed: 01/17/2024] Open
Abstract
Circular RNAs (circRNAs) are highly expressed in the mammalian intestinal epithelium, but their functions remain largely unknown. Here, we identified the circRNA Cdr1as as a repressor of intestinal epithelial regeneration and defense. Cdr1as levels increased in mouse intestinal mucosa after colitis and septic stress, as well as in human intestinal mucosa from patients with inflammatory bowel disease and sepsis. Ablation of the Cdr1as locus from the mouse genome enhanced renewal of the intestinal mucosa, promoted injury-induced epithelial regeneration, and protected the mucosa against colitis. We found approximately 40 microRNAs, including miR-195, differentially expressed between intestinal mucosa of Cdr1as-knockout (Cdr1as-/-) versus littermate mice. Increasing the levels of Cdr1as inhibited intestinal epithelial repair after wounding in cultured cells and repressed growth of intestinal organoids cultured ex vivo, but this inhibition was abolished by miR-195 silencing. The reduction in miR-195 levels in the Cdr1as-/- intestinal epithelium was the result of reduced stability and processing of the precursor miR-195. These findings indicate that Cdr1as reduces proliferation and repair of the intestinal epithelium at least in part via interaction with miR-195 and highlight a role for induced Cdr1as in the pathogenesis of unhealed wounds and disrupted renewal of the intestinal mucosa.
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Affiliation(s)
- Hee Kyoung Chung
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Lan Xiao
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
- Baltimore Veterans Affairs Medical Center, Baltimore, Maryland, USA
| | - Naomi Han
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Jason Chen
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Vivian Yao
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Cassandra M. Cairns
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Benjamin Raufman
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Jaladanki N. Rao
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
- Baltimore Veterans Affairs Medical Center, Baltimore, Maryland, USA
| | - Douglas J. Turner
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
- Baltimore Veterans Affairs Medical Center, Baltimore, Maryland, USA
| | - Rosemary Kozar
- Shock Trauma Center, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Myriam Gorospe
- Laboratory of Genetics and Genomics, National Institute on Aging-IRP, NIH, Baltimore, Maryland, USA
| | - Jian-Ying Wang
- Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
- Baltimore Veterans Affairs Medical Center, Baltimore, Maryland, USA
- Department of Pathology, University of Maryland School of Medicine, Baltimore, Maryland, USA
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Pan SM, Wang CL, Hu ZF, Zhang ML, Pan ZF, Zhou RY, Wang XJ, Huang SW, Li YY, Wang Q, Luo X, Zhou L, Hou JT, Chen B. Baitouweng decoction repairs the intestinal barrier in DSS-induced colitis mice via regulation of AMPK/mTOR-mediated autophagy. JOURNAL OF ETHNOPHARMACOLOGY 2024; 318:116888. [PMID: 37437793 DOI: 10.1016/j.jep.2023.116888] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/05/2023] [Accepted: 07/07/2023] [Indexed: 07/14/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Ulcerative colitis (UC) is one of non-specific inflammatory bowel disease that mainly affects the colon. Recently, UC has become a significant social and economic problem worldwide. Baitouweng decoction (BD), a traditional Chinese medicine described in the "Treatise on Febrile Diseases", has been used for centuries to treat intestinal diseases. However, its underlying mechanism remains largely unexplored. AIM OF STUDY In this study, we aimed to investigate the effect of BD on autophagy for repairing the colonic barrier in DSS-induced colitis mice and explored its role in regulating the autophagic signaling pathway AMPK/mTOR. MATERIALS AND METHODS Mice with colitis were treated with 3% dextran sulfate sodium (DSS) for 7 days. The effectiveness of BD in treating DSS-induced colitis was evaluated through body weight, disease activity index (DAI), colon length, pathological changes, organ index, and proportion of blood cells. Moreover, intestinal epithelial permeability was analyzed by examining FITC-dextran leakage, the bacterial load of mesenteric lymph nodes (MLNs), and bacterial infiltration of colon tissues. Barrier function was evaluated by assessing the number and proportion of colonic goblet cells and the expression of tight junction proteins, including ZO-1, claudin-1, and occludin. Furthermore, the levels of autophagy were assessed by examining the number of autophagosomes and the expression of the autophagy-related proteins LC3, Beclin1, and P62. Additionally, network pharmacology research was conducted to analyze the potential mechanisms underlying the medicinal effects, as indicated by the role of AMPK/mTOR in regulating the autophagic signaling pathway. RESULTS BD improved colitis symptoms in mice by restoring body weight and colon length and reducing inflammatory cell infiltration. Additionally, BD decreased the diffusion of FITC-dextran and bacterial translocation in MLNs, as well as bacterial infiltration of the colonic mucosa. The number and proportion of colonic goblet cells, the expression of ZO-1, Claudin-1, and Occludin, and the levels of autophagy were also increased by BD. Network pharmacology analysis suggested that BD might affect intestinal autophagy through the AMPK signaling pathway, which was confirmed by the activation of AMPK phosphorylation and the downregulation of mTOR expression following BD treatment. CONCLUSION Our study demonstrated that BD repaired the intestinal epithelial barrier in DSS-induced colitis mice by activating AMPK phosphorylation and inhibiting mTOR expression to promote autophagy.
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Affiliation(s)
- Si-Min Pan
- Department of Gastroenterology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China; The First Clinical College, Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
| | - Chun-Li Wang
- Department of Gastroenterology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China; The First Clinical College, Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
| | - Zhi-Fan Hu
- Department of Gastroenterology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China; The First Clinical College, Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
| | - Mei-Ling Zhang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Zeng-Feng Pan
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Ruo-Yu Zhou
- Department of Gastroenterology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China; The First Clinical College, Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
| | - Xiao-Jing Wang
- Department of Gastroenterology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
| | - Shao-Wei Huang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Yan-Yang Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Qing Wang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Xia Luo
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Lian Zhou
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Jiang-Tao Hou
- Department of Gastroenterology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China.
| | - Bin Chen
- Department of Gastroenterology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China.
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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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Lun J, Guo J, Yu M, Zhang H, Fang J. Circular RNAs in inflammatory bowel disease. Front Immunol 2023; 14:1307985. [PMID: 38187401 PMCID: PMC10771839 DOI: 10.3389/fimmu.2023.1307985] [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: 10/05/2023] [Accepted: 12/07/2023] [Indexed: 01/09/2024] Open
Abstract
Inflammatory bowel disease (IBD) is a term encompassing a few chronic inflammatory disorders that leads to damage of the intestinal tract. Although much progress has been made in understanding the pathology of IBD, the precise pathogenesis is not completely understood. Circular RNAs (circRNAs) are single-stranded, covalently closed, endogenous molecules in eukaryotes with a variety of biological functions. CircRNAs have been shown to have regulatory effects in many diseases, such as cancer, cardiovascular disease, and neurological disorders. CircRNAs have also been found to play important roles in IBD, and although they are not sufficiently investigated in the context of IBD, a few circRNAs have been identified as potential biomarkers for the diagnosis and prognosis of IBD and as potential therapeutic targets for IBD. Herein, we survey recent progress in understanding the functions and roles of circRNAs in IBD and discuss their potential clinical applications.
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Affiliation(s)
- Jie Lun
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, Qingdao, China
| | - Jing Guo
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, Qingdao, China
| | - Mengchao Yu
- Central Laboratories, Qingdao Municipal Hospital, Qingdao, China
| | - Hongwei Zhang
- Shandong Provincial Maternal and Child Health Care Hospital Affiliated to Qingdao University, Jinan, China
| | - Jing Fang
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, Qingdao, China
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Yan L, Gu C, Gao S, Wei B. Epigenetic regulation and therapeutic strategies in ulcerative colitis. Front Genet 2023; 14:1302886. [PMID: 38169708 PMCID: PMC10758477 DOI: 10.3389/fgene.2023.1302886] [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: 09/27/2023] [Accepted: 12/07/2023] [Indexed: 01/05/2024] Open
Abstract
Ulcerative colitis (UC) is an inflammatory bowel disease, and is characterized by the diffuse inflammation and ulceration in the colon and rectum mucosa, even extending to the caecum. Epigenetic modifications, including DNA methylations, histone modifications and non-coding RNAs, are implicated in the differentiation, maturation, and functional modulation of multiple immune and non-immune cell types, and are influenced and altered in various chronic inflammatory diseases, including UC. Here we review the relevant studies revealing the differential epigenetic features in UC, and summarize the current knowledge about the immunopathogenesis of UC through epigenetic regulation and inflammatory signaling networks, regarding DNA methylation, histone modification, miRNAs and lncRNAs. We also discuss the epigenetic-associated therapeutic strategies for the alleviation and treatment of UC, which will provide insights to intervene in the immunopathological process of UC in view of epigenetic regulation.
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Affiliation(s)
- Liwei Yan
- The First Clinical College, Shandong University of Traditional Chinese Medicine, Jinan, China
- Departments of Anorectal Surgery, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Chao Gu
- Departments of Anorectal Surgery, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Shanyu Gao
- Departments of Anorectal Surgery, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Benzheng Wei
- Center for Medical Artificial Intelligence, Shandong University of Traditional Chinese Medicine, Jinan, China
- Qingdao Academy of Chinese Medical Sciences, Shandong University of Traditional Chinese Medicine, Jinan, China
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Ghasemi-Dehnoo M, Amini-Khoei H, Lorigooini Z, AnjomShoa M, Rafieian-Kopaei M. Ferulic acid ameliorates ulcerative colitis in a rat model via the inhibition of two LPS-TLR4-NF-κB and NF-κB-INOS-NO signaling pathways and thus alleviating the inflammatory, oxidative and apoptotic conditions in the colon tissue. Inflammopharmacology 2023; 31:2587-2597. [PMID: 37432553 DOI: 10.1007/s10787-023-01277-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 06/21/2023] [Indexed: 07/12/2023]
Abstract
INTRODUCTION Ulcerative colitis is a chronic inflammation of the colon. However, the common treatment for it is accompanied by many complications. Therefore, the present study was aimed to determine the ameliorative effects of ferulic acid on acetic acid-induced colitis in rat. MATERIALS AND METHODS To induce ulcerative colitis, animals received 0.8 ml of 7% acetic acid intra-rectally. Ferulic acid in 20, 40, and 60 mg/kg doses was administered orally one hour after the ulcerative colitis induction. Animals received treatments for five consecutive days and then were euthanized on the sixth day. The colon was dissected out and macroscopic lesions were examined. Colon samples were evaluated for histopathological examination, biochemical analysis, determination of the expression of inflammatory, and apoptotic genes as well as total antioxidant capacity. RESULTS Ferulic acid significantly inhibited inflammatory and apoptotic genes mRNA expression, also production of MDA and NO. Ferulic acid significantly increased the activity of antioxidant factors (TAC content, and SOD and CAT activity), thereby preventing inflammation and histopathological damage in the colon tissue of colitis rats. CONCLUSION The results of the present study confirmed the antioxidant, anti-inflammatory, and anti-apoptotic properties of ferulic acid. About the mechanism of action of this compound, it can be concluded that the ability of ferulic acid in the amelioration of ulcerative colitis is related to the inhibition of two LPS-TLR4-NF-κB and NF-κB-INOS-NO signaling pathways.
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Affiliation(s)
- Maryam Ghasemi-Dehnoo
- Medical Plants Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Hossein Amini-Khoei
- Medical Plants Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Zahra Lorigooini
- Medical Plants Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Maryam AnjomShoa
- Medical Plants Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Mahmoud Rafieian-Kopaei
- Medical Plants Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran.
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Qadir J, Wen SY, Yuan H, Yang BB. CircRNAs regulate the crosstalk between inflammation and tumorigenesis: The bilateral association and molecular mechanisms. Mol Ther 2023; 31:1514-1532. [PMID: 36518080 PMCID: PMC10278049 DOI: 10.1016/j.ymthe.2022.12.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 11/16/2022] [Accepted: 12/09/2022] [Indexed: 12/15/2022] Open
Abstract
Inflammation, a hallmark of cancer, has been associated with tumor progression, transition into malignant phenotype and efficacy of the chemotherapeutic agents in cancer. Chronic inflammation provides a favorable environment for tumorigenesis by inducing immunosuppression, whereas acute inflammation prompts tumor suppression by generating anti-tumor immune responses. Inflammatory factors derived from interstitial cells or tumor cells can stimulate cell proliferation and survival by modulating oncogenes and/or tumor suppressors. Recently, a new class of RNAs, i.e., circular RNAs (circRNAs), has been implicated in inflammatory diseases. Although there are reports on circRNAs imparting functions in inflammatory insults, whether these circularized transcripts hold the potential to regulate inflammation-induced cancer or tumor-related inflammation, and modulate the interactions between tumor microenvironment (TME) and the inflammatory stromal/immune cells, awaits further elucidation. Contextually, the current review describes the molecular association between inflammation and cancer, and spotlights the regulatory mechanisms by which circRNAs can moderate TME in response to inflammatory signals/triggers. We also present comprehensive information about the immune cell(s)-specific expression and functions of the circRNAs in TME, modulation of inflammatory signaling pathways to drive tumorigenesis, and their plausible roles in inflammasomes and tumor development. Moreover, the therapeutic potential of these circRNAs in harnessing inflammatory responses in cancer is also discussed.
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Affiliation(s)
- Javeria Qadir
- Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, Toronto, ON, Canada; Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
| | - Shuo-Yang Wen
- Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Hui Yuan
- Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Burton B Yang
- Sunnybrook Research Institute, Sunnybrook Health Sciences Centre, Toronto, ON, Canada; Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada.
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10
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Chen Z, Gu Q, Chen R. miR-146a-5p regulates autophagy and NLRP3 inflammasome activation in epithelial barrier damage in the in vitro cell model of ulcerative colitis through the RNF8/Notch1/mTORC1 pathway. Immunobiology 2023; 228:152386. [PMID: 37329823 DOI: 10.1016/j.imbio.2023.152386] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 04/10/2023] [Accepted: 04/11/2023] [Indexed: 06/19/2023]
Abstract
Ulcerative colitis (UC) is a chronic inflammatory disease affecting the colon that can be influenced by microRNAs (miRNAs). This study aims to investigate the impact of miR-146a-5p on lipopolysaccharide (LPS)-induced Caco-2/HT-29 cell autophagy and NLRP3 inflammasome activation and the underlying mechanism, with the aim of identifying potential therapeutic targets. We used LPS to establish Caco-2/HT-29 cell models and measured cell viability by CCK-8. The levels of miR-146a-5p, RNF8, markers of NLRP3 inflammasome activation and autophagy, proteins involved in the Notch1/mTORC1 pathway, and inflammatory factors were assessed by RT-qPCR, Western blot, and ELISA. Intestinal epithelial barrier function was evaluated by measuring transepithelial electrical resistance. Autophagic flux was measured using tandem fluorescent-labeled LC3. miR-146a-5p was highly-expressed in LPS-induced Caco-2/HT-29 cells, and autophagy flux was blocked at the autolysosomal stage after LPS induction. Inhibition of miR-146a-5p suppressed NLRP3 inflammasome activation, reduced intestinal epithelial barrier damage, and facilitated autophagy inhibition in LPS-induced Caco-2/HT-29 cells. The autophagy inhibitor NH4Cl partially nullified the inhibitory effects of miR-146a-5p inhibition on NLRP3 inflammation activation. miR-146a-5p targeted RNF8, and silencing RNF8 partly abrogated the action of miR-146a-5p inhibition on promoting autophagy and inhibiting NLRP3 inflammasome activation. miR-146a-5p inhibition suppressed the Notch1/mTORC1 pathway activation by upregulating RNF8. Inhibition of the Notch1/mTORC1 pathway partially nullified the function of silencing RNF8 on inhibiting autophagy and bolstering NLRP3 inflammasome activation. In conclusion, miR-146a-5p inhibition may be a potential therapeutic approach for UC, as it facilitates autophagy of LPS-stimulated Caco-2/HT-29 cells, inhibits NLRP3 inflammasome activation, and reduces intestinal epithelial barrier damage by upregulating RNF8 and suppressing the Notch1/mTORC1 pathway.
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Affiliation(s)
- Zepeng Chen
- Department of Anorectal Surgery, The Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210029, China; First Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Qinglong Gu
- Department of Anorectal Surgery, The Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210029, China; First Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Ruichao Chen
- Department of Anorectal Surgery, Xuzhou City Hospital of TCM, Xuzhou, Jiangsu 221000, China.
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m6A modification in inflammatory bowel disease provides new insights into clinical applications. Biomed Pharmacother 2023; 159:114298. [PMID: 36706633 DOI: 10.1016/j.biopha.2023.114298] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/13/2023] [Accepted: 01/20/2023] [Indexed: 01/26/2023] Open
Abstract
Inflammatory bowel disease (IBD) results from a complex interplay between genetic predisposition, environmental factors, and gut microbes. The role of N6-methyladenosine (m6A) methylation in the pathogenesis of IBD has attracted increasing attention. m6A modification not only regulates intestinal mucosal immunity and intestinal barrier function, but also affects apoptosis and autophagy in intestinal epithelial cells. Additionally, m6A modification participated in the interaction between gut microbes and the host, providing a novel direction to explore the molecular mechanisms of IBD and the theoretical basis for specific microorganism-oriented prevention and treatment measures. m6A regulators are expected to be biomarkers for predicting the prognosis of IBD patients. m6A methylation may be utilized as a novel target in the management of IBD. This review focused on the recent advances in how m6A modification causes the initiation and development of IBD, and provided new insights into optimal prevention and treatment measures for IBD.
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Xiang P, Ge T, Zhou J, Zhang Y. Protective role of circRNA CCND1 in ulcerative colitis via miR-142-5p/NCOA3 axis. BMC Gastroenterol 2023; 23:18. [PMID: 36658474 PMCID: PMC9850594 DOI: 10.1186/s12876-023-02641-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 01/04/2023] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Increasing research indicates that circular RNAs (circRNAs) play critical roles in the development of ulcerative colitis (UC). This study aimed to determine the role of circRNA CCND1 in UC bio-progression, which has been shown to be downregulated in UC tissues. METHODS Reverse transcription quantitative polymerase chain reaction was used to determine the levels of circRNA CCND1, miR-142-5p, and nuclear receptor coactivator-3 (NCOA3) in UC tissues and in lipopolysaccharide (LPS)-induced Caco-2 cells. Target sites of circRNA CCND1 and miR-142-5p were predicted using StarBase, and TargetScan to forecast potential linkage points of NCOA3 and miR-142-5p, which were confirmed by a double luciferase reporter-gene assay. Cell Counting Kit 8 and flow cytometry assays were performed to assess Caco-2 cell viability and apoptosis. TNF-α, IL-1β, IL-6, and IL-8 were detected using Enzyme-Linked Immunosorbent Assay kits. RESULTS CircRNA CCND1 was downregulated in UC clinical samples and LPS-induced Caco-2 cells. In addition, circRNA CCND1 overexpression suppressed LPS-induced apoptosis and inflammatory responses in Caco-2 cells. Dual-luciferase reporter-gene assays showed that miR-142-5p could be linked to circRNA CCND1. Moreover, miR-142-5p was found to be highly expressed in UC, and its silencing inhibited LPS-stimulated Caco-2 cell apoptosis and inflammatory responses. Importantly, NCOA3 was found downstream of miR-142-5p. Overexpression of miR-142-5p reversed the inhibitory effect of circRNA CCND1-plasmid on LPS-stimulated Caco-2 cells, and the effects of miR-142-5p inhibitor were reversed by si-NCOA3. CONCLUSION CircRNA CCND1 is involved in UC development by dampening miR-142-5p function, and may represent a novel approach for treating UC patients.
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Affiliation(s)
- Ping Xiang
- grid.460072.7Department of Anorectal Surgery, The First People’s Hospital of Lianyungang, No. 6 Zhenhua Road, Haizhou District, Lianyungang, 222000 China
| | - Tingrui Ge
- grid.460072.7Department of Anorectal Surgery, The First People’s Hospital of Lianyungang, No. 6 Zhenhua Road, Haizhou District, Lianyungang, 222000 China
| | - Jingyi Zhou
- grid.460072.7Department of Anorectal Surgery, The First People’s Hospital of Lianyungang, No. 6 Zhenhua Road, Haizhou District, Lianyungang, 222000 China
| | - Yonggang Zhang
- grid.460072.7Department of Anorectal Surgery, The First People’s Hospital of Lianyungang, No. 6 Zhenhua Road, Haizhou District, Lianyungang, 222000 China
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Lu L, Liu Y, Zhang G, Xu Y, Hu D, Ji G, Xu H. The circRNA expression profile of colorectal inflammatory cancer transformation revealed potential predictive biomarkers. Aging (Albany NY) 2022; 14:9280-9299. [PMID: 36446351 PMCID: PMC9740358 DOI: 10.18632/aging.204406] [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: 03/22/2022] [Accepted: 11/21/2022] [Indexed: 11/30/2022]
Abstract
Colorectal cancer (CRC) is one of the most common malignant tumors in the world, and most colorectal cancer is transformed from colorectal adenoma (CRA). Identifying biomarkers for the early prediction of colorectal cancer would be an important finding. Circular RNA (circRNA) plays a key role in the occurrence and development of tumors, and its biological characteristics make it a potential biomarker for the early diagnosis of diseases. Therefore, we explored the relationship between circRNA and the malignant transformation from colorectal adenoma to colorectal cancer. We constructed inflammation-based tumorigenesis mouse models and performed high-throughput RNA sequencing to determine the expression profile of circRNAs in tissues at different stages of disease. Subsequent STEM analysis showed that with the development of the disease, 30 circRNAs were significantly downregulated, and 10 circRNAs were significantly upregulated. After qRT-PCR and Fish analysis verification, it was clear that mmu_circ_0008035 and mmu_circ_0000420 were significantly and continuously overexpressed in the development of colorectal cancer in our mouse model. Next, through homology analysis of circRNA in human and mouse and validation of clinical normal tissues, adenoma tissues and CRC tissues, we found biomarkers of has_circ0101338 ahashsa_circ0022426 that could predict the malignant transformation of human colorectal inflammation into CRC and have certain diagnostic value. In conclusion, our results may shed light on the mechanism of progression from precancerous adenoma to cancer and provide biomarkers that may be used in the early diagnosis of CRC.
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Affiliation(s)
- Lu Lu
- Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Yujing Liu
- Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Guangtao Zhang
- Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Yangxian Xu
- Department of General Surgery, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Dan Hu
- Department of Internal Medicine, Shanghai Pudong New Area Hospital of Traditional Chinese Medicine, Shanghai 200032, China
| | - Guang Ji
- Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
| | - Hanchen Xu
- Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 200032, China
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Li X, Li L, Si X, Zhang Z, Ni Z, Zhou Y, Liu K, Xia W, Zhang Y, Gu X, Huang J, Yin C, Shao A, Jiang L. The regulatory roles of circular RNAs via autophagy in ischemic stroke. Front Neurol 2022; 13:963508. [PMID: 36330428 PMCID: PMC9623297 DOI: 10.3389/fneur.2022.963508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 09/07/2022] [Indexed: 11/24/2022] Open
Abstract
Ischemic stroke (IS) is a severe disease with a high disability, recurrence, and mortality rates. Autophagy, a highly conserved process that degrades damaged or aging organelles and excess cellular components to maintain homeostasis, is activated during IS. It influences the blood–brain barrier integrity and regulates apoptosis. Circular RNAs (circRNAs) are novel non-coding RNAs involved in IS-induced autophagy and participate in various pathological processes following IS. In addition, they play a role in autophagy regulation. This review summarizes current evidence on the roles of autophagy and circRNA in IS and the potential mechanisms by which circRNAs regulate autophagy to influence IS injury. This review serves as a basis for the clinical application of circRNAs as novel biomarkers and therapeutic targets in the future.
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Affiliation(s)
- Xiaoqin Li
- The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Lingfei Li
- Department of Neurology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaoli Si
- Department of Neurology, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Zheng Zhang
- The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Zhumei Ni
- Department of Emergency, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yongji Zhou
- Department of Neurology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Keqin Liu
- Department of Neurology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Wenqing Xia
- Department of Neurology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yuyao Zhang
- The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Xin Gu
- The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jinyu Huang
- Department of Cardiology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Congguo Yin
- The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
- Department of Neurology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
- *Correspondence: Congguo Yin
| | - Anwen Shao
- Department of Neurosurgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
- Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological Disease, Hangzhou, China
- Anwen Shao
| | - Lin Jiang
- The Fourth School of Clinical Medicine, Zhejiang Chinese Medical University, Hangzhou, China
- Department of Neurology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Lin Jiang
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Xu Y, Yang J, Chen X, Deng J, Gong H, Li F, Ouyang M. MicroRNA-182-5p aggravates ulcerative colitis by inactivating the Wnt/β-catenin signaling pathway through DNMT3A-mediated SMARCA5 methylation. Genomics 2022; 114:110360. [PMID: 35378241 DOI: 10.1016/j.ygeno.2022.110360] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 03/16/2022] [Accepted: 03/29/2022] [Indexed: 01/14/2023]
Abstract
This research focused on novel molecular mechanisms underlying microRNA (miR)-182-5p in ulcerative colitis (UC). Colon tissues were obtained from UC patients, and dextrose sodium sulfate (DSS)-induced mouse and interleukin-1β (IL-1β)-induced Caco-2 cell models were generated. Then, miR-182-5p, SMARCA5, and the Wnt/β-catenin signaling pathway were altered in IL-1β-stimulated Caco-2 cells and DSS-treated mice to assess their function. MiR-182-5p and SMARCA5 were upregulated and DNMT3A, β-catenin, and Cyclin D1 were downregulated in UC patients, IL-1β-stimulated Caco-2 cells, and DSS-treated mice. Mechanistically, miR-182-5p targeted DNMT3A to upregulate SMARCA5, thus blocking the Wnt/β-catenin signaling pathway. Moreover, SMARCA5 silencing or Wnt/β-catenin signaling pathway activation repressed apoptosis and augmented proliferation and epithelial barrier function of IL-1β-stimulated Caco-2 cells. SMARCA5 silencing annulled the impacts of miR-182-5p overexpression on IL-1β-stimulated Caco-2 cells. SMARCA5 silencing or miR-182-5p inhibition ameliorated intestinal barrier dysfunction in DSS-treated mice. Collectively, miR-182-5p aggravates UC by inactivating the Wnt/β-catenin signaling pathway through DNMT3A-mediated SMARCA5 methylation.
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Affiliation(s)
- Yan Xu
- Department of Health Management Center, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Junwen Yang
- Department of Gastroenterology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Xiaoli Chen
- Department of Gastroenterology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Jiawen Deng
- Department of Gastroenterology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Hui Gong
- Department of Health Management Center, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China
| | - Fujun Li
- Department of Gastroenterology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China.
| | - Miao Ouyang
- Department of Gastroenterology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, PR China.
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Zhang Y, Yang W, Li W, Zhao Y. NLRP3 Inflammasome: Checkpoint Connecting Innate and Adaptive Immunity in Autoimmune Diseases. Front Immunol 2021; 12:732933. [PMID: 34707607 PMCID: PMC8542789 DOI: 10.3389/fimmu.2021.732933] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 09/20/2021] [Indexed: 12/12/2022] Open
Abstract
Autoimmune diseases are a broad spectrum of human diseases that are characterized by the breakdown of immune tolerance and the production of autoantibodies. Recently, dysfunction of innate and adaptive immunity is considered to be a key step in the initiation and maintenance of autoimmune diseases. NOD-like receptor family pyrin domain containing 3 (NLRP3) inflammasome is a multimeric protein complex, which can detect exogenous pathogen irritants and endogenous danger signals. The main function of NLRP3 inflammasome is to promote secretion of interleukin (IL)-1β and IL-18, and pyroptosis mediated by caspase-1. Served as a checkpoint in innate and adaptive immunity, aberrant activation and regulation of NLRP3 inflammasome plays an important role in the pathogenesis of autoimmune diseases. This paper reviewed the roles of NLRP3 inflammasome in autoimmune diseases, which shows NLRP3 inflammasome may be a potential target for autoimmune diseases deserved further study.
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Affiliation(s)
- Yiwen Zhang
- Department of Dermatology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Wenlin Yang
- Department of Dermatology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Wangen Li
- Department of Endocrinology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yunjuan Zhao
- Department of Endocrinology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
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