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Gao FF, Chen DQ, Jiang YT, Han CF, Lin BY, Yang Z, Quan JH, Xiong YH, Chen XT. Functional roles of circular RNAs in lung injury. Front Pharmacol 2024; 15:1354806. [PMID: 38601461 PMCID: PMC11004487 DOI: 10.3389/fphar.2024.1354806] [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: 12/13/2023] [Accepted: 01/16/2024] [Indexed: 04/12/2024] Open
Abstract
Lung injury leads to respiratory dysfunction, low quality of life, and even life-threatening conditions. Circular RNAs (circRNAs) are endogenous RNAs produced by selective RNA splicing. Studies have reported their involvement in the progression of lung injury. Understanding the roles of circRNAs in lung injury may aid in elucidating the underlying mechanisms and provide new therapeutic targets. Thus, in this review, we aimed to summarize and discuss the characteristics and biological functions of circRNAs, and their roles in lung injury from existing research, to provide a theoretical basis for the use of circRNAs as a diagnostic and therapeutic target for lung injury.
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Affiliation(s)
- Fei-Fei Gao
- Stem Cell Research and Cellular Therapy Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Dian-Qing Chen
- Department of Hand and Foot Surgery, Armed Police Corps Hospital of Hebei, Shijiazhuang, Hebei, China
| | - Yue-Tong Jiang
- Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Cui-Fei Han
- Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Bi-Yun Lin
- Biotissue Repository, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Zhan Yang
- Biotissue Repository, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Juan-Hua Quan
- Laboratory of Gastroenterology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Ying-Huan Xiong
- Biotissue Repository, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Xin-Tian Chen
- Laboratory of Gastroenterology, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
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Zhang P, Guo E, Xu L, Shen Z, Jiang N, Liu X. Knockdown of circ-Gatad1 alleviates LPS induced HK2 cell injury via targeting miR-22-3p/TRPM7 axis in septic acute kidney. BMC Nephrol 2024; 25:79. [PMID: 38443846 PMCID: PMC10916237 DOI: 10.1186/s12882-024-03513-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 02/20/2024] [Indexed: 03/07/2024] Open
Abstract
BACKGROUND Sepsis is a life-threatening, systemic inflammatory disease that can lead to a variety of conditions, including septic acute kidney injury (AKI). Recently, multiple circular Rnas (circRNAs) have been implicated in the development of this disease. METHODS In this study, we aimed to elucidate the role of circ-Gatad1 in sepsis induced AKI and its potential mechanism of action. High-throughput sequencing was used to investigate abnormal expression of circRNA in AKI and healthy volunteer. Bioinformatics analysis and luciferase reporting analysis were used to clarify the interacted relationship among circRNA, miRNA and mRNA. HK2 cells were treated with lipopolysaccharide (LPS) to establish septic AKI cell model. HK2 cells were employ to analysis the ROS, inflammatory cytokines expression, proliferation and apoptosis under LPS condition. RESULTS The result show that the expression of circ-Gatad1 was increased in septic acute kidney patients. Downregulation circ-Gatad1 suppressed LPS-treated induced HK2 cells injury including apoptosis, proliferation ability, ROS and inflammatory cytokines level. Bioinformatics and luciferase report analysis confirmed that both miR-22-3p and TRPM7 were downstream targets of circ-Gatad1. Overexpression of TRPM7 or downregulation of miR-22-3p reversed the protective effect of si-circ-Gatad1 to HK2 after exposure to LPS (5 µg/ml) microenvironment. CONCLUSION In conclusion, knockdown of circ-Gatad1 alleviates LPS induced HK2 cell injury via targeting miR-22-3p/TRPM7 axis in septic acute kidney.
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Affiliation(s)
- Pan Zhang
- Department of Clinical Laboratory, Gongli Hospital of Shanghai Pudong New Area, 219 Miao Pu Road, 200135, Shanghai, China
| | - Enwei Guo
- Department of Intensive Care Unit, Gongli Hospital of Shanghai Pudong New Area, 219 Miao Pu Road, 200135, Shanghai, China
| | - Limin Xu
- Department of Clinical Laboratory, Gongli Hospital of Shanghai Pudong New Area, 219 Miao Pu Road, 200135, Shanghai, China
| | - Zhenhua Shen
- Department of Clinical Laboratory, Gongli Hospital of Shanghai Pudong New Area, 219 Miao Pu Road, 200135, Shanghai, China
| | - Na Jiang
- Department of Clinical Laboratory, Gongli Hospital of Shanghai Pudong New Area, 219 Miao Pu Road, 200135, Shanghai, China
| | - Xinhui Liu
- Department of Clinical Laboratory, Gongli Hospital of Shanghai Pudong New Area, 219 Miao Pu Road, 200135, Shanghai, China.
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Huang Y, Lin J, Wu Z, Li Y. Circular RNA circVAPA modulates macrophage pyroptosis in sepsis-induced acute lung injury through targeting miR-212-3p/Sirt1/Nrf2/NLRP3 axis. Int J Exp Pathol 2024; 105:21-32. [PMID: 38054576 PMCID: PMC10797424 DOI: 10.1111/iep.12497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 08/29/2023] [Accepted: 10/21/2023] [Indexed: 12/07/2023] Open
Abstract
Sepsis-induced acute lung injury (ALI) is an inflammatory condition involving the pyroptosis of macrophages. This study investigated the role of circular RNA hsa_circ_0006990 (circVAPA) in regulating macrophage pyroptosis in ALI and the underlying mechanisms. The expression pattern of circVAPA was examined in the mouse model of ALI and in the LPS-treated RAW264.7 macrophage cell line. Lung tissue damage was evaluated by haematoxylin and eosin staining, immunohistochemistry and a myeloperoxidase activity assay. The molecular mechanisms were investigated by luciferase reporter assay, western blot, RT-qPCR and ELISA. circVAPA was down-regulated in the lung tissues of ALI mice and LPS-induced RAW264.7 cells. circVAPA over-expression alleviated lung tissue injury and dampened LPS-induced pyroptosis and Th17-associated inflammatory responses. miR-212-3p was identified as a target of circVAPA, and miR-212-3p negatively regulated the expression of Sirt1. Sirt1 knockdown largely abolished the effect of circVAPA over-expression on pyroptosis. CircVAPA/miR-212-3p/Sirt1 axis also regulates Nrf2 and NLRP3 expression upon LPS challenge. By targeting miR-212-3p, circVAPA over-expression negatively regulates the expression of Sirt1 and pyroptosis-related factors (Nrf2 and NLRP3), which alleviates the inflammatory damages in sepsis-induced ALI.
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Affiliation(s)
- Yanjing Huang
- Department of Emergency, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian Province, China
| | - Jinquan Lin
- Trauma Center/Department of Emergency Surgery, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian Province, China
| | - Zhiwei Wu
- Department of Cardiology, The First Hospital of Putian, Putian, China
| | - Yiming Li
- Department of Emergency, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian Province, China
- Department of Emergency, National Regional Medical Center, Binhai Campus of the First Affiliated Hospital, Fujian Medical University, Fuzhou, China
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Xia R, Shan Y, Luo S, Li J, Liu Y. CIRC_0033530 KNOCKDOWN ALLEVIATES LIPOPOLYSACCHARIDE-INDUCED ACUTE LUNG INJURY MODEL OF HUMAN LUNG FIBROBLASTS BY MIR-1184/TLR4 AXIS. Shock 2024; 61:215-222. [PMID: 37962954 DOI: 10.1097/shk.0000000000002270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
ABSTRACT Background: Circular RNAs have been reported to be involved in regulating the progression of sepsis and sepsis-associated damage. Herein, this work investigated whether circ_0033530 had roles in the process of septic acute lung injury (sepsis-ALI) and its associated mechanism. Methods: Lipopolysaccharide (LPS)-stimulated human lung fibroblasts MRC-5 were used to mimic the cell model of sepsis-ALI in vitro . Levels of genes and proteins were detected by quantitative real-time polymerase chain reaction and Western blotting. Functional experiments were conducted using 5-ethynyl-2'-deoxyuridine assay, Cell Counting Kit-8 assay, flow cytometry, and enzyme-linked immunosorbent assay. The interaction between miR-1184 and circ_0033530 or toll-like receptor 4 (TLR4) was confirmed by dual-luciferase reporter and RNA immunoprecipitation assays. Results: Circ_0033530 expression was lower in sepsis patients and LPS-induced fibroblasts than those in healthy control and untreated cells. Functionally, knockdown of circ_0033530 protected fibroblasts against LPS-induced proliferation arrest, apoptosis, and inflammatory response. Mechanistically, circ_0033530 acted as a sponge for miR-1184, and TLR4 RNA was targeted by miR-1184, indicating the circ_0033530/miR-1184/TLR4 axis. Further rescue experiments showed that circ_0033530 silencing-mediated growth inhibition and inflammation on fibroblasts were attenuated by miR-1184 downregulation or TLR4 upregulation. Conclusion: Circ_0033530 knockdown alleviated LPS-induced proliferation arrest, apoptosis, and inflammation in lung fibroblasts by miR-1184/TLR4 axis, and provided molecular theoretical basis for circ_0033530 on the pathogenesis of sepsis-ALI.
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Affiliation(s)
- Rui Xia
- Synthesize Intensive Care Unit, Zhumadian Central Hospital, Zhumadian 463000, China
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Zhao J, Zhao Q, Duan Q. Circ_0114428 knockdown inhibits ROCK2 expression to assuage lipopolysaccharide-induced human pulmonary alveolar epithelial cell injury through miR-574-5p. J Physiol Sci 2024; 74:5. [PMID: 38297223 PMCID: PMC10829305 DOI: 10.1186/s12576-023-00891-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 11/19/2023] [Indexed: 02/02/2024]
Abstract
BACKGROUND Sepsis-induced acute lung injury (ALI) accounts for about 40% of ALI, accompanied by alveolar epithelial injury. The study aimed to reveal the role of circular RNA_0114428 (circ_0114428) in sepsis-induced ALI. METHODS Human pulmonary alveolar epithelial cells (HPAEpiCs) were treated with lipopolysaccharide (LPS) to mimic a sepsis-induced ALI cell model. RNA expression of circ_0114428, miR-574-5p and Rho-associated coiled-coil containing protein kinase 2 (ROCK2) was detected by qRT-PCR. Protein expression was checked by Western blotting. Cell viability, proliferation and apoptosis were investigated by cell counting kit-8, 5-Ethynyl-29-deoxyuridine (EdU) and flow cytometry analysis, respectively. The levels of pro-inflammatory factors were detected by enzyme-linked immunosorbent assay (ELISA). Oxidative stress was analyzed by lipid peroxidation Malondialdehyde (MDA) and Superoxide Dismutase (SOD) activity detection assays. The interplay among circ_0114428, miR-574-5p and ROCK2 was identified by dual-luciferase reporter, RNA pull-down and RNA immunoprecipitation assays. RESULTS Circ_0114428 and ROCK2 expression were significantly increased, but miR-574-5p was decreased in blood samples from sepsis patients and LPS-stimulated HPAEpiCs. LPS treatment led to decreased cell viability and proliferation and increased cell apoptosis, inflammation and oxidative stress; however, these effects were relieved after circ_0114428 knockdown. Besides, circ_0114428 acted as a miR-574-5p sponge and regulated LPS-treated HPAEpiC disorders through miR-574-5p. Meanwhile, ROCK2 was identified as a miR-574-5p target, and its silencing protected against LPS-induced cell injury. Importantly, circ_0114428 knockdown inhibited ROCK2 production by interacting with miR-574-5p. CONCLUSION Circ_0114428 knockdown protected against LPS-induced HPAEpiC injury through miR-574-5p/ROCK2 axis, providing a novel therapeutic target in sepsis-induced ALI.
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Affiliation(s)
- Jing Zhao
- Department of Critical Care Medicine, Yantai City Yantaishan Hospital, Keji Avenue, Laishan District, Yantai, 10087, Shandong, China
| | - Qin Zhao
- Emergency Internal Medicine Department, Weifang People's Hospital, Weifang, Shandong, China
| | - Qiuxia Duan
- Department of Critical Care Medicine, The Third People's Hospital of Qingdao, No. 29 Yongping Road, Licang District, Qingdao, 266000, Shandong, China.
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Wei X, Yi X, Liu J, Sui X, Li L, Li M, Lv H, Yi H. Circ-phkb promotes cell apoptosis and inflammation in LPS-induced alveolar macrophages via the TLR4/MyD88/NF-kB/CCL2 axis. Respir Res 2024; 25:62. [PMID: 38287405 PMCID: PMC10826187 DOI: 10.1186/s12931-024-02677-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 01/03/2024] [Indexed: 01/31/2024] Open
Abstract
BACKGROUND Circular RNAs (CircRNAs) have been associated with acute lung injury (ALI), but their molecular mechanisms remain unclear. METHODS This study developed a rat model of lipopolysaccharide (LPS)-induced ALI and evaluated the modeling effect by hematoxylin and eosin staining, Masson's trichrome staining, lung wet-to-dry weight ratio, terminal deoxynucleotidyl transferase UTP nick end labeling (TUNEL), and enzyme-linked immunosorbent assay (ELISA) detection of inflammatory factors (interleukin-1β, tumor necrosis factor alpha, and interleukin-6). Using lung tissues from a rat model of LPS-induced ALI, we then conducted circRNA sequencing, mRNA sequencing, and bioinformatics analysis to obtain differential circRNA and mRNA expression profiles as well as potential ceRNA networks. Furthermore, we performed quantitative real-time polymerase chain reaction (qRT-PCR) assays to screen for circ-Phkb in ALI rat lung tissues, alveolar macrophages, and LPS-induced NR8383 cells. We conducted induction with or without LPS with circ-Phkb siRNA and overexpression lentivirus in NR8383. Cell Counting Kit-8, C5-Ethynyl-2'-deoxyuridine (Edu), TUNEL, and cytometry were used to identify proliferation and apoptosis, respectively. We detected inflammatory factors using ELISA. Finally, we used Western blot to detect the apoptosis-related proteins and TLR4/MyD88/NF-kB/CCL2 pathway activation. RESULTS Our results revealed that both circRNA and mRNA profiles are different from those of the Sham group. We observed a significant circ-Phkb upregulation in NR8383 cells and LPS-exposed rats. Apoptosis and inflammation were greatly reduced when circ-Phkb expression was reduced in NR8383 cells, cell proliferation was increased, and circ-Phkb overexpression was decreased. CONCLUSIONS In terms of mechanism, circ-Phkb suppression inhibits CCL2 expression via the TLR4/MyD88/NF-kB pathway in LPS-induced alveolar macrophages.
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Affiliation(s)
- Xuxia Wei
- Surgical Intensive Care Unit, The Third Affiliated Hospital of Sun Yat-Sen University, No. 600, Tianhe Road, Tianhe District, Guangzhou, Guangdong, 510630, China
| | - Xiaomeng Yi
- Surgical Intensive Care Unit, The Third Affiliated Hospital of Sun Yat-Sen University, No. 600, Tianhe Road, Tianhe District, Guangzhou, Guangdong, 510630, China
| | - Jianrong Liu
- Surgical Intensive Care Unit, The Third Affiliated Hospital of Sun Yat-Sen University, No. 600, Tianhe Road, Tianhe District, Guangzhou, Guangdong, 510630, China
| | - Xin Sui
- Surgical Intensive Care Unit, The Third Affiliated Hospital of Sun Yat-Sen University, No. 600, Tianhe Road, Tianhe District, Guangzhou, Guangdong, 510630, China
| | - Lijuan Li
- Surgical Intensive Care Unit, The Third Affiliated Hospital of Sun Yat-Sen University, No. 600, Tianhe Road, Tianhe District, Guangzhou, Guangdong, 510630, China
| | - Mei Li
- VIP Healthcare Center, The Third Affiliated Hospital of Sun Yat-Sen University, No. 600, Tianhe Road, Tianhe District, Guangzhou, Guangdong, 510630, China.
| | - Haijin Lv
- Surgical Intensive Care Unit, The Third Affiliated Hospital of Sun Yat-Sen University, No. 600, Tianhe Road, Tianhe District, Guangzhou, Guangdong, 510630, China.
| | - Huimin Yi
- Surgical Intensive Care Unit, The Third Affiliated Hospital of Sun Yat-Sen University, No. 600, Tianhe Road, Tianhe District, Guangzhou, Guangdong, 510630, China.
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Tuerdimaimaiti D, Abuduaini B, Kang S, Jiao J, Li M, Madeniyati W, Tuerdi B, Aili G, Tuerhong R, Kulaxi A. Genome-wide identification and functional analysis of dysregulated alternative splicing profiles in sepsis. J Inflamm (Lond) 2023; 20:31. [PMID: 37749550 PMCID: PMC10521395 DOI: 10.1186/s12950-023-00355-w] [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: 12/29/2022] [Accepted: 08/10/2023] [Indexed: 09/27/2023] Open
Abstract
BACKGROUND An increasing body of evidence now shows that the long-term mortality of patients with sepsis are associated with various sepsis-related immune cell defects. Alternative splicing (AS), as a sepsis-related immune cell defect, is considered as a potential immunomodulatory therapy target to improve patient outcomes. However, our understanding of the role AS plays in sepsis is currently insufficient. AIM This study investigated possible associations between AS and the gene regulatory networks affecting immune cells. We also investigated apoptosis and AS functionality in sepsis pathophysiology. METHODS In this study, we assessed publicly available mRNA-seq data that was obtained from the NCBI GEO dataset (GSE154918), which included a healthy group (HLTY), a mild infection group (INF1), asepsis group (Seps), and a septic shock group (Shock). A total of 79 samples (excluding significant outliers) were identified by a poly-A capture method to generate RNA-seq data. The variable splicing events and highly correlated RNA binding protein (RBP) genes in each group were then systematically analyzed. RESULTS For the first time, we used systematic RNA-seq analysis of sepsis-related AS and identified 1505 variable AS events that differed significantly (p <= 0.01) across the four groups. In the sepsis group, the genes related to significant AS events, such as, SHISA5 and IFI27, were mostly enriched in the cell apoptosis pathway. Furthermore, we identified differential splicing patterns within each of the four groups. Significant differences in the expression of RNA Binding Protein(RBP) genes were observed between the control group and the sepsis group. RBP gene expression was highly correlated with variant splicing events in sepsis, as determined by co-expression analysis; The expression of DDX24, CBFA2T2, NOP, ILF3, DNMT1, FTO, PPRC1, NOLC1 RBPs were significant reduced in sepsis compared to the healthy group. Finally, we constructed an RBP-AS functional network. CONCLUSION Analysis indicated that the RBP-AS functional network serves as a critical post-transcriptional mechanism that regulates the development of sepsis. AS dysregulation is associated with alterations in the regulatory gene expression network that is involved in sepsis. Therefore, the RBP-AS expression network could be useful in refining biomarker predictions in the development of new therapeutic targets for the pathogenesis of sepsis.
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Affiliation(s)
- Dilixiati Tuerdimaimaiti
- Department of RICU, The First Affiliated Hospital of Xinjiang Medical University, 393 South Li Yu Shan Road, Wulumuqi, Xinjiang, 830054, China
| | - Buzukela Abuduaini
- The Intensive Care Unit, The First Affiliated Hospital of Xinjiang Medical University, Wulumuqi, Xinjiang, 830054, China
| | - Shaotao Kang
- Department of RICU, The First Affiliated Hospital of Xinjiang Medical University, 393 South Li Yu Shan Road, Wulumuqi, Xinjiang, 830054, China
| | - Jinliang Jiao
- Department of RICU, The First Affiliated Hospital of Xinjiang Medical University, 393 South Li Yu Shan Road, Wulumuqi, Xinjiang, 830054, China
| | - Mengchen Li
- Department of RICU, The First Affiliated Hospital of Xinjiang Medical University, 393 South Li Yu Shan Road, Wulumuqi, Xinjiang, 830054, China
| | - Wolazihan Madeniyati
- Department of RICU, The First Affiliated Hospital of Xinjiang Medical University, 393 South Li Yu Shan Road, Wulumuqi, Xinjiang, 830054, China
| | - Baihetinisha Tuerdi
- Department of RICU, The First Affiliated Hospital of Xinjiang Medical University, 393 South Li Yu Shan Road, Wulumuqi, Xinjiang, 830054, China.
| | - Gulisitan Aili
- Department of RICU, The First Affiliated Hospital of Xinjiang Medical University, 393 South Li Yu Shan Road, Wulumuqi, Xinjiang, 830054, China
| | - Reyila Tuerhong
- Department of RICU, The First Affiliated Hospital of Xinjiang Medical University, 393 South Li Yu Shan Road, Wulumuqi, Xinjiang, 830054, China
| | - Ajiguli Kulaxi
- Department of RICU, The First Affiliated Hospital of Xinjiang Medical University, 393 South Li Yu Shan Road, Wulumuqi, Xinjiang, 830054, China
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Sun H, Gao W, Chen R, Chen S, Gu X, Wang F, Li Q. CircRNAs in BALF exosomes and plasma as diagnostic biomarkers in patients with acute respiratory distress syndrome caused by severe pneumonia. Front Cell Infect Microbiol 2023; 13:1194495. [PMID: 37674577 PMCID: PMC10477665 DOI: 10.3389/fcimb.2023.1194495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 06/29/2023] [Indexed: 09/08/2023] Open
Abstract
Background The transcriptomic studies targeting circular RNAs (circRNAs) in bronchoalveolar lavage fluid (BALF) exosomes of acute respiratory distress syndrome (ARDS) patients caused by severe pneumonia have rarely been reported. This study aimed to screen and validate abnormally expressed circRNAs in exosomes from BALF of patients with ARDS caused by severe pneumonia and then evaluate the diagnostic values of these circRNAs for ARDS. Method BALF was collected from four patients with ARDS caused by severe pneumonia and four healthy subjects. CircRNA expression profile was obtained by microarray analysis in BALF exosomes of the discovery cohort. The differentially expressed circRNAs in BALF exosomes were verified by real-time quantitative PCR (RT-qPCR) and underwent competitive endogenous RNA (ceRNA) network construction and functional enrichment analysis. Results A total of 629 circRNAs were differentially expressed in BALF exosomes between ARDS patients and healthy subjects. Nine differentially expressed circRNAs were validated by RT-qPCR, and seven were consistent with the results of microarray analysis. CeRNA network analysis was performed for hsa_circRNA_002809, hsa_circRNA_042882, and hsa_circRNA_104034. Functional enrichment analysis showed that the target genes were mainly associated with hypoxia-induced damage, inflammatory response, and the HIF-1 signaling pathway. Hsa_circRNA_042882 and hsa_circRNA_104034 can be regarded as promising diagnostic biomarkers for patients with ARDS caused by severe pneumonia, with remarkable sensitivity and specificity of the area under the curve of 0.8050 and 1 or 0.835 and 0.799, respectively. Conclusion This study obtained circRNA expression profiles of ARDS patients, and hsa_circRNA_042882 and hsa_circRNA_104034 were regarded as promising diagnostic biomarkers for patients with ARDS caused by severe pneumonia.
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Affiliation(s)
- He Sun
- *Correspondence: Qiang Li, ; Feilong Wang, ; He Sun,
| | | | | | | | | | - Feilong Wang
- Department of Respiratory and Critical Care Medicine, Shanghai East Hospital, Tongji University, Shanghai, China
| | - Qiang Li
- Department of Respiratory and Critical Care Medicine, Shanghai East Hospital, Tongji University, Shanghai, China
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Tan Y, Yu Z, Li P, Liu Y, You T, Kuang F, Luo W. Circ_0001714 knockdown alleviates lipopolysaccharide-induced apoptosis and inflammation in renal tubular epithelial cells via miR-129-5p/TRAF6 axis in septic acute kidney injury. J Bioenerg Biomembr 2023; 55:289-300. [PMID: 37526815 DOI: 10.1007/s10863-023-09975-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Accepted: 06/28/2023] [Indexed: 08/02/2023]
Abstract
BACKGROUND Circular RNAs (circRNAs) have been shown to play roles in regulating sepsis. Sepsis is a major cause of acute kidney injury (AKI). Herein, we aimed to investigate the role and mechanism of circ_0001714 in the progression of sepsis-induced AKI. METHODS Human HK-2 cells were exposed to lipopolysaccharide (LPS) for functional experiments. Quantitative real-time polymerase chain reaction and western blotting were used for expression analysis. Functional experiments were performed by using MTT assay, 5-ethynyl-2'-deoxyuridine assay, flow cytometry, and enzyme-linked immunosorbent assay (ELISA). The binding between miR-129-5p and circ_0001714 or TRAF6 (TNF receptor associated factor 6) was validated using dual-luciferase reporter assay. RESULTS Circ_0001714 expression was higher in sepsis-AKI patients. HK-2 cells were exposed to LPS to imitate the injury of renal tubular epithelial cells during sepsis-AKI. LPS dose-dependently up-regulated circ_0001714, moreover, circ_0001714 silencing reversed LPS-evoked apoptosis and inflammation in HK-2 cells. Mechanistically, circ_0001714 sequestered miR-129-5p to up-regulate TRAF6 expression, implying the circ_0001714/miR-129-5p/TRAF6 feedback loop. MiR-129-5p was decreased, while TRAF6 was increased in sepsis-AKI patients and LPS-stimulated HK-2 cells. MiR-129-5p re-expression or TRAF6 silencing protected against LPS-induced HK-2 cell apoptosis and inflammation. Additionally, a series of rescue experiments showed that miR-129-5p inhibition reversed the inhibitory action of circ_0001714 knockdown on LPS-induced HK-2 cell injury. Furthermore, TRAF6 overexpression also attenuated the protective effects of miR-129-5p on HK-2 cells under LPS treatment. CONCLUSION Circ_0001714 silencing might alleviate LPS-induced apoptosis and inflammation via targeting miR-129-5p/TRAF6 axis in HK-2 cells.
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Affiliation(s)
- Yiqing Tan
- The First Affiliated Hospital, Department of Critical Care Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Ziying Yu
- The First Affiliated Hospital, Department of Emergency, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Pei Li
- The First Affiliated Hospital, Department of Clinical Laboratory, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Yu Liu
- The First Affiliated Hospital, Department of Emergency, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Ting You
- The First Affiliated Hospital, Department of Emergency, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Feng Kuang
- The First Affiliated Hospital, Department of Emergency, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Wei Luo
- The First Affiliated Hospital, Department of Cardiovasology, Hengyang Medical School, University of South China, Hengyang, Hunan, China.
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Zhang R, Dang X, Liu J, Feng H, Sun J, Peng Z. CIRCTDRD9 CONTRIBUTES TO SEPSIS-INDUCED ACUTE LUNG INJURY BY ENHANCING THE EXPRESSION OF RAB10 VIA DIRECTLY BINDING TO MIR-223-3P. Shock 2023; 60:206-213. [PMID: 37548713 DOI: 10.1097/shk.0000000000002169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
ABSTRACT Background: The dysregulation of circular RNAs (circRNAs) is involved in various human diseases, including sepsis-induced acute lung injury (ALI). We aimed to investigate the role of circTDRD9 in the development of sepsis-induced ALI. Methods: Cell models of sepsis-induced ALI were established by treating A549 cells with LPS. The expression of circTDRD9, miR-223-3p, and RAB10 mRNA was measured by quantitative real-time PCR (qPCR). The levels of inflammatory factors were measured by ELISA. Oxidative stress-related indicators were monitored by using commercial detection kits. The expression of fibrosis-related proteins was detected by Western blot assay. Cell proliferation was assessed by EdU assay. The predicted binding relationship between miR-223-3p and circTDRD9 or RAB10 was verified by dual-luciferase reporter assay, RIP assay or pull-down assay. Results: CircTDRD9 was highly expressed in LPS-treated A549 cells. CircTDRD9 downregulation prevented LPS-induced inflammation, oxidative stress, cell proliferation inhibition, and cell fibrosis in A549 cells, whereas these effects were reversed by the inhibition of miR-223-3p, a target of circTDRD9. In addition, RAB10 was verified as a target of miR-223-3p, and RAB10 overexpression recovered LPS-induced inflammation, oxidative stress, cell proliferation inhibition, and cell fibrosis in A549 cells that were ameliorated by miR-223-3p restoration. Importantly, circTDRD9 positively regulated RAB10 expression by binding to miR-223-3p. Conclusion: CircTDRD9 overexpression was closely associated with LPS-induced ALI. CircTDRD9 contributed to LPS-induced ALI partly by upregulating RAB10 via binding to miR-223-3p.
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Affiliation(s)
- Rui Zhang
- Emergency Department, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
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11
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Gao P, Duan W, Shi H, Wang Q. Silencing circPalm2 inhibits sepsis-induced acute lung injury by sponging miR-376b-3p and targeting MAP3K1. Toxicol Res 2023; 39:275-294. [PMID: 37008689 PMCID: PMC10050541 DOI: 10.1007/s43188-022-00169-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 12/26/2022] [Accepted: 12/28/2022] [Indexed: 01/18/2023] Open
Abstract
The apoptosis and inflammation of pulmonary epithelial cells are important pathogenic factors of sepsis-induced acute lung injury (ALI). Upregulation of circPalm2 (circ_0001212) expression levels has been previously detected in the lung tissue of ALI rats. Herein, the biological significance and detailed mechanism of circPalm2 in ALI pathogenesis were investigated. In vivo models of sepsis-induced ALI were established by treating C57BL/6 mice with cecal ligation and puncture (CLP) surgery. Murine pulmonary epithelial cells (MLE-12 cells) were stimulated with lipopolysaccharide (LPS) to establish in vitro septic ALI models. MLE-12 cell viability and apoptosis were evaluated by CCK-8 assay and flow cytometry analysis, respectively. The pathological alterations of the lung tissue were analysed based on hematoxylin-eosin (H&E) staining. Cell apoptosis in the lung tissue samples was examined by TUNEL staining assay. LPS administration suppressed the viability and accelerated the inflammation and apoptotic behaviours of MLE-12 cells. CircPalm2 displayed high expression in LPS-stimulated MLE-12 cells and possessed circular characteristics. The silencing of circPalm2 impeded apoptosis and inflammation in LPS-stimulated MLE-12 cells. Mechanistically, circPalm2 bound with miR-376b-3p, which targeted MAP3K1. In rescue assays, MAP3K1 enhancement reversed the repressive effects of circPalm2 depletion on LPS-triggered inflammatory injury and MLE-12 cell apoptosis. Furthermore, the lung tissue collected from CLP model mice displayed low miR-376b-3p expression and high levels of circPalm2 and MAP3K1. CircPalm2 positively regulated MAP3K1 expression by downregulating miR-376b-3p in murine lung tissues. Importantly, circPalm2 knockdown attenuated CLP-induced inflammation, apoptosis, and pathological alterations in lung tissues collected from mice. Silenced circPalm2 inhibits LPS-induced pulmonary epithelial cell dysfunction and mitigates abnormalities in lung tissues collected from CLP-stimulated mice via the miR-376b-3p/MAP3K1 axis in septic ALI. Supplementary Information The online version contains supplementary material available at 10.1007/s43188-022-00169-7.
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Affiliation(s)
- Pengfei Gao
- Shanghai East Clinical Medical College, Nanjing Medical University, No. 150, Jimo Road, Pudong New Area, Shanghai, 200120 China
- Department of Anesthesiology, The Affiliated Huaian No. 1 People’s Hospital of Nanjing Medical University, Huaian, Jiangsu 223300 China
| | - Wenying Duan
- Shanghai East Clinical Medical College, Nanjing Medical University, No. 150, Jimo Road, Pudong New Area, Shanghai, 200120 China
| | - Huiyan Shi
- Jinzhou Medical University, Jinzhou, Liaoning 121001 China
| | - Qingxiu Wang
- Shanghai East Clinical Medical College, Nanjing Medical University, No. 150, Jimo Road, Pudong New Area, Shanghai, 200120 China
- Shanghai East Hopital, Tongji University School of Medicine, Shanghai, 200120 China
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12
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Chen W, Chang Y, Sun C, Xu M, Dong M, Zhao N, Wang Y, Zhang J, Xu N, Liu W. A novel circular RNA circNLRP3 alleviated ricin toxin-induced TNF-α production through sponging miR-221-5p. Toxicon 2023; 224:107046. [PMID: 36702354 DOI: 10.1016/j.toxicon.2023.107046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 01/22/2023] [Accepted: 01/22/2023] [Indexed: 01/24/2023]
Abstract
Acting as microRNA (miRNA) sponges, circular RNAs (circRNAs) have been discovered to be critical modulators of inflammatory processes. Ricin Toxin (RT) is highly toxic to mammalian cells and low doses of RT can induce acute inflammation. However, current researches on the underlying mechanism and function of circRNA/miRNA network in RT-induced inflammation are limited. Previously, we found miR-221-5p was aberrant and associated with the inflammation of RT induction. In this study, based on the circRNA high-throughput sequencing (circRNA-seq), we obtained a novel circRNA termed circNLRP3 and revealed that circNLRP3 can sponge miR-221-5p, release its target mRNA A20, and further suppress NF-κB signaling pathway to alleviated RT-induced TNF-α production. Our findings elucidated a possible mechanistic link between the circNLRP3/miR-221-5p/A20 axis and RT-induced inflammatory response, which may broaden our understanding of RT poisoning.
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Affiliation(s)
- Wei Chen
- Department of Physiology and Pathophysiology, College of Medicine, Yanbian University, Yanji, 133002, Jilin, PR China
| | - Ying Chang
- Jilin Medical University, Jilin, 132013, Jilin, PR China
| | - Chengbiao Sun
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, 130122, Jilin, PR China
| | - Meng Xu
- College of Life Science, Jilin Agricultural University, Changchun, 130118, Jilin, PR China
| | - Mingxin Dong
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, 130122, Jilin, PR China
| | - Na Zhao
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, 130122, Jilin, PR China
| | - Yan Wang
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, 130122, Jilin, PR China
| | - Jianxu Zhang
- Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, 130122, Jilin, PR China
| | - Na Xu
- Jilin Medical University, Jilin, 132013, Jilin, PR China.
| | - Wensen Liu
- Department of Physiology and Pathophysiology, College of Medicine, Yanbian University, Yanji, 133002, Jilin, PR China; Changchun Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Changchun, 130122, Jilin, PR China.
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13
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Yang D, Zhao D, Ji J, Wang C, Liu N, Bao X, Liu X, Jiang S, Zhang Q, Tang L. CircRNA_0075723 protects against pneumonia-induced sepsis through inhibiting macrophage pyroptosis by sponging miR-155-5p and regulating SHIP1 expression. Front Immunol 2023; 14:1095457. [PMID: 36923408 PMCID: PMC10008927 DOI: 10.3389/fimmu.2023.1095457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 02/16/2023] [Indexed: 03/01/2023] Open
Abstract
Introduction Circular RNAs (circRNAs) have been linked to regulate macrophage polarization and subsequent inflammation in sepsis. However, the underlying mechanism and the function of circRNAs in macrophage pyroptosis in pneumonia-induced sepsis are still unknown. Methods In this study, we screened the differentially expressed circRNAs among the healthy individuals, pneumonia patients without sepsis and pneumonia-induced sepsis patients in the plasma by RNA sequencing (RNA-seq). Then we evaluated macrophage pyroptosis in sepsis patients and in vitro LPS/nigericin activated THP-1 cells. The lentiviral recombinant vector for circ_0075723 overexpression (OE-circ_0075723) and circ_0075723 silence (sh-circ_0075723) were constructed and transfected into THP-1 cells to explore the potential mechanism of circ_0075723 involved in LPS/nigericin induced macrophage pyroptosis. Results We found circ_0075723, a novel circRNA that was significantly downregulated in pneumonia-induced sepsis patients compared to pneumonia patients without sepsis and healthy individuals. Meanwhile, pneumonia-induced sepsis patients exhibited activation of NLRP3 inflammasome and production of the pyroptosis-associated pro-inflammatory cytokines IL-1β and IL-18. circ_0075723 inhibited macrophage pyroptosis via sponging miR-155-5p which promoted SHIP1 expression directly. Besides, we found that circ_0075723 in macrophages promoted VE-cadherin expression in endothelial cells through inhibiting the release of NLRP3 inflammasome-related cytokines, IL-1β and IL-18, and protects endothelial cell integrity. Discussion Our findings propose a unique approach wherein circ_0075723 suppresses macrophage pyroptosis and inflammation in pneumonia-induced sepsis via sponging with miR-155-5p and promoting SHIP1 expression. These findings indicate that circRNAs could be used as possible potential diagnostic and therapeutic targets for pneumonia-induced sepsis.
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Affiliation(s)
- Dianyin Yang
- Department of Internal Emergency Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
- Medical School, Tongji University, Shanghai, China
| | - Dongyang Zhao
- Department of Internal Emergency Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
- Medical School, Tongji University, Shanghai, China
| | - Jinlu Ji
- Medical School, Tongji University, Shanghai, China
| | - Chunxue Wang
- Department of Internal Emergency Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
- Medical School, Tongji University, Shanghai, China
| | - Na Liu
- Department of Nephrology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xiaowei Bao
- Department of Internal Emergency Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
- Medical School, Tongji University, Shanghai, China
| | - Xiandong Liu
- Department of Internal Emergency Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Sen Jiang
- Department of Internal Emergency Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | | | - Lunxian Tang
- Department of Internal Emergency Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
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Mu Q, Zhang C, Li R, Guo Z. CircPalm2 knockdown alleviates LPS-evoked pulmonary microvascular endothelial cell apoptosis and inflammation via miR-450b-5p/ROCK1 axis. Int Immunopharmacol 2022; 113:109199. [DOI: 10.1016/j.intimp.2022.109199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 08/08/2022] [Accepted: 08/23/2022] [Indexed: 11/05/2022]
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15
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Xu F, Chen R, Shen Y, Liu H, Hu L, Zhu L. CircUBXN7 suppresses cell proliferation and facilitates cell apoptosis in lipopolysaccharide-induced cell injury by sponging miR-622 and regulating the IL6ST/JAK1/STAT3 axis. Int J Biochem Cell Biol 2022; 153:106313. [DOI: 10.1016/j.biocel.2022.106313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 09/26/2022] [Accepted: 10/13/2022] [Indexed: 11/07/2022]
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16
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You T, Zhang B. CircWDR33 alleviates human pulmonary microvascular endothelial cell injury in sepsis-associated acute lung injury by targeting miR-217-5p/SERP1 axis. Int Immunopharmacol 2022; 113:109440. [DOI: 10.1016/j.intimp.2022.109440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 11/03/2022] [Accepted: 11/05/2022] [Indexed: 11/21/2022]
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Wong R, Zhang Y, Zhao H, Ma D. Circular RNAs in organ injury: recent development. J Transl Med 2022; 20:533. [PMID: 36401311 PMCID: PMC9673305 DOI: 10.1186/s12967-022-03725-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 10/24/2022] [Indexed: 11/19/2022] Open
Abstract
Circular ribonucleic acids (circRNAs) are a class of long non-coding RNA that were once regarded as non-functional transcription byproducts. However, recent studies suggested that circRNAs may exhibit important regulatory roles in many critical biological pathways and disease pathologies. These studies have identified significantly differential expression profiles of circRNAs upon changes in physiological and pathological conditions of eukaryotic cells. Importantly, a substantial number of studies have suggested that circRNAs may play critical roles in organ injuries. This review aims to provide a summary of recent studies on circRNAs in organ injuries with respect to (1) changes in circRNAs expression patterns, (2) main mechanism axi(e)s, (3) therapeutic implications and (4) future study prospective. With the increasing attention to this research area and the advancement in high-throughput nucleic acid sequencing techniques, our knowledge of circRNAs may bring fruitful outcomes from basic and clinical research.
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Gao P, Wu B, Ding Y, Yin B, Gu H. circEXOC5 promotes acute lung injury through the PTBP1/Skp2/Runx2 axis to activate autophagy. Life Sci Alliance 2022; 6:6/1/e202201468. [PMID: 36302650 PMCID: PMC9614700 DOI: 10.26508/lsa.202201468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 10/09/2022] [Accepted: 10/10/2022] [Indexed: 01/17/2023] Open
Abstract
To understand the pathogenesis of acute lung injury (ALI), we focused on circEXOC5, a significantly up-regulated circular RNA in ALI. Using the in vivo cecal ligation and puncture (CLP)-induced ALI mouse model and in vitro LPS-challenged mouse pulmonary microvascular endothelial cell (MPVEC) model, we examined the impacts of knockdown circEXOC5 on lung injury, inflammation, and autophagy. The regulation between circEXOC5, polypyrimidine tract-binding protein 1 (PTBP1), S-phase kinase-associated protein 2 (Skp2), and Runt-related transcription factor 2 (Runx2) was investigated by combining RNA immunoprecipitation, qRT-PCR, mRNA stability, and ubiquitination assays. The significance of PTBP1 in circEXOC5-induced ALI phenotypes was examined both in vitro and in vivo. circEXOC5 was up-regulated and associated with increased inflammation and activated autophagy in cecal ligation and puncture-induced ALI lung tissues and LPS-challenged MPVECs. Through the interaction with PTBP1, circEXOC5 accelerated Skp2 mRNA decay, an E3 ubiquitin ligase for Runx2, and therefore increased Runx2 expression. Functionally, overexpressing PTBP1 reversed shcircEXOC5-inhibited ALI, inflammation, or autophagy. The signaling cascade circEXOC5/PTBP1/Skp2/Runx2, by essentially regulating inflammation and autophagy in MPVECs, aggravates sepsis-induced ALI.
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Affiliation(s)
| | | | | | | | - Haoxiang Gu
- Department of Respiratory, Shanghai Children's Hospital, School of medicine, Shanghai Jiao Tong University, Shanghai, China
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19
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Yang YQ, Ge P, Lv MQ, Yu PF, Liu ZG, Zhang J, Zhao WB, Han SP, Sun RF, Zhou DX. Rno_circRNA_008646 regulates formaldehyde induced lung injury through Rno-miR-224 mediated FOXI1/CFTR axis. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 243:113999. [PMID: 35998475 DOI: 10.1016/j.ecoenv.2022.113999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 08/09/2022] [Accepted: 08/17/2022] [Indexed: 06/15/2023]
Abstract
Formaldehyde (FA) serves as a prevailing air pollutant, which has seriously threatened public health in recent years. Of all the known health effects, lung injury is one of the most severe risks. However, little is known about the circRNAs related molecular mechanism in the development of lung injury induced by FA. This study was designed to explore the potential roles of dysregulated circRNAs as well as its mechanism in FA-induced lung injury. In the present study, 24 male SD rats were exposed to formaldehyde (control, 0.5, 2.46 and 5 mg/m3) for 8 h per day for 8 weeks to induce lung injury. We used H&E staining to evaluate the histopathological changes of lung injury indifferent groups. The expression of circRNAs in lung tissue was detected by real-time PCR. Meanwhile, circRNA/miRNA/mRNA interaction networks were predicted by bioinformatics analysis. Our study revealed that formaldehyde exposure resulted in abnormal histopathological changes in lung tissues. Moreover, the expression of rno_circRNA_008646 was significantly higher in lung tissues of formaldehyde exposure rats than in control. Bioinformatics analysis showed that one potential target miRNA/mRNA for rno_circRNA_008646 was rno-miR-224/Forkhead Box I1 (FOXI1). Besides, luciferase report gene confirmed that there was targeted binding relationship between rno_circRNA_008646 and rno-miR-224, rno-miR-224 and FOXI1. Further verification experiments indicated that the expression of rno_circRNA_008646 was negatively correlated rno-miR-224, while it was positively correlated with FOXI1. JASPAR database showed transcription factor FOXI1 located in promotor of CF Transmembrane Conductance Regulator (CFTR). Both FOXI1 and CFTR were up-regulated in lung tissues after formaldehyde exposure. In conclusion, our findings suggested that formaldehyde may induce lung injury, and this may be caused by up-regulatedrno_circRNA_008646, which medicated rno-miR-224/FOXI1/CFTR axis.
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Affiliation(s)
- Yan-Qi Yang
- Department of Pathology, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, Shaanxi PR China; Institute of Genetics and Developmental Biology, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, Shaanxi, PR China
| | - Pan Ge
- Department of Pathology, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, Shaanxi PR China; Institute of Genetics and Developmental Biology, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, Shaanxi, PR China
| | - Mo-Qi Lv
- Department of Pathology, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, Shaanxi PR China; Institute of Genetics and Developmental Biology, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, Shaanxi, PR China
| | - Peng-Fei Yu
- Department of Gastrointestinal Surgery, Xijing Hospital of Digestive Diseases, Xijing Hospital, Fourth Military Medical University, Changlexi St. 127#, Xi'an, Shaanxi, PR China
| | - Zhi-Gang Liu
- Department of Thoracic Surgery, Tumor Hospital of Shaanxi Province, Affiliated to the Medical College of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, PR China
| | - Jian Zhang
- Department of Pathology, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, Shaanxi PR China; Institute of Genetics and Developmental Biology, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, Shaanxi, PR China
| | - Wen-Bao Zhao
- Department of Pathology, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, Shaanxi PR China; Institute of Genetics and Developmental Biology, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, Shaanxi, PR China
| | - Shui-Ping Han
- Department of Pathology, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, Shaanxi PR China; Institute of Genetics and Developmental Biology, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, Shaanxi, PR China
| | - Rui-Fang Sun
- Department of Pathology, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, Shaanxi PR China; Institute of Genetics and Developmental Biology, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, Shaanxi, PR China.
| | - Dang-Xia Zhou
- Department of Pathology, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, Shaanxi PR China; Institute of Genetics and Developmental Biology, Xi'an Jiaotong University, 76 Yanta West Road, Xi'an, Shaanxi, PR China.
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CircEXOC5 facilitates cell pyroptosis via epigenetic suppression of Nrf2 in septic acute lung injury. Mol Cell Biochem 2022; 478:743-754. [PMID: 36074295 DOI: 10.1007/s11010-022-04521-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 07/05/2022] [Indexed: 10/14/2022]
Abstract
Acute lung injury (ALI) caused by sepsis is characterized by a destructive high inflammatory response in lungs, which is the ultimate cause of high mortality to patients diagnosed with sepsis. The objective of the present study is to explore the effect and related mechanisms of circEXOC5 on pyroptosis in septic ALI. Sepsis ALI mouse model was induced and established by CLP induction and sepsis MPVEC cell model by LPS. HE staining was used to detect lung tissue pathological changes. ELISA, flow cytometry, and Western blot were utilized to evaluate the release of inflammatory cytokines and cell pyroptosis, and RIP was applied to verify the binding relationship between EZH2 and circEXOC5 or Nrf2. Finally, the interaction between CircEXOC5 and EZH2, H3k27me3, and Nrf2 promoter regions was clarified using ChIP. CircEXOC5 levels were notably ascended in the lung tissues of septic ALI mice. And silencing circEXOC5 inhibited cell pyroptosis and the release of inflammatory cytokines in MPVEC stimulated by LPS. In addition, RIP and ChIP indicated that Nrf2 expression in MPVECs cells could be inhibited by circEXOC5 via recruiting EZH2. In addition, ML385 (a specific inhibitor of Nrf2) reversed the efficacy of Knockdown of circEXOC5 on the Inhibition of pyroptosis and inflammation of MPVEC cells stimulated by LPS. These results indicated that CircEXOC5 could promote cell pyroptosis through epigenetic inhibition of Nrf2 in septic ALI.
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21
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Cao J, Kuang D, Luo M, Wang S, Fu C. Targeting circNCLN/miR-291a-3p/TSLP signaling axis alleviates lipopolysaccharide-induced acute lung injury. Biochem Biophys Res Commun 2022; 617:60-67. [PMID: 35679712 DOI: 10.1016/j.bbrc.2022.05.095] [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: 05/07/2022] [Accepted: 05/30/2022] [Indexed: 11/27/2022]
Abstract
Acute lung injury (ALI) is a life-threatening disease caused by the severe and acute response of the lungs to a variety of direct and indirect insults. Patients with ALI are currently treated mainly with respiratory support due to inadequate understanding of ALI progression. Alveolar epithelial cells produced thymic stromal lymphopoietin (TSLP) has been proved to worsen ALI by triggering airway inflammation. However, the regulation mechanism of TSLP expression remains unclear. In this study, we identified the crucial role played by circNCLN in lipopolysaccharide (LPS)-induced ALI. We demonstrated for the first time that miR-291a-3p could directly bind to the 3'UTR of TSLP and suppress TSLP expression in alveolar epithelial cells. Mechanistically, our data identified that circNCLN acts as a molecular sponge to antagonize miR-291a-3p and thereby maintaining the expression of TSLP in alveolar epithelial cells. Importantly, targeting circNCLN by its antisense oligonucleotide (ASO) markedly alleviated LPS-induced ALI. Therefore, our results suggested that circNCLN/miR-291a-3p/TSLP axis may be an important signaling in LPS-induced ALI and circNCLN inhibition may serve as a potential treatment of ALI.
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Affiliation(s)
- Jianwei Cao
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Daibin Kuang
- Department of Emergency Intensive Care Unit, Affiliated Dongguan Hospital, Southern Medical University (Dongguan People's Hospital), Dongguan, Guangdong, China
| | - Ming Luo
- Department of Emergency Intensive Care Unit, Affiliated Dongguan Hospital, Southern Medical University (Dongguan People's Hospital), Dongguan, Guangdong, China
| | - Shanzhong Wang
- Department of Emergency Intensive Care Unit, Affiliated Dongguan Hospital, Southern Medical University (Dongguan People's Hospital), Dongguan, Guangdong, China
| | - Chunlai Fu
- Chronic Airways Diseases Laboratory, Department of Respiratory and Critical Care Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China; Department of Emergency Intensive Care Unit, Affiliated Dongguan Hospital, Southern Medical University (Dongguan People's Hospital), Dongguan, Guangdong, China.
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22
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Huang Y, Zheng G. Circ_UBE2D2 Attenuates the Progression of Septic Acute Kidney Injury in Rats by Targeting miR-370-3p/NR4A3 Axis. J Microbiol Biotechnol 2022; 32:740-748. [PMID: 35722711 PMCID: PMC9628902 DOI: 10.4014/jmb.2112.12038] [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: 12/20/2021] [Revised: 04/27/2022] [Accepted: 05/09/2022] [Indexed: 12/15/2022]
Abstract
As circ_UBE2D2 has been confirmed to have targeted binding sites with multiple miRNAs involved in septic acute kidney injury (SAKI), efforts in this study are directed to unveiling the specific role and relevant mechanism of circ_UBE2D2 in SAKI. HK-2 cells were treated with lipopolysaccharide (LPS) to construct SAKI model in vitro. After sh-circ_UBE2D2 was transfected into cells, the transfection efficiency was detected by qRT-PCR, cell viability and apoptosis were determined by MTT assay and flow cytometry, and expressions of Bcl-2, Bax and Cleaved-caspase 3 were quantified by western blot. Target genes associated with circ_UBE2D2 were predicted using bioinformatics analysis. After the establishment of SAKI rat model, HE staining and TUNEL staining were exploited to observe the effect of circ_UBE2D2 on tissue damage and cell apoptosis. The expression of circ_UBE2D2 was overtly elevated in LPS-induced HK-2 cells. Sh-circ_UBE2D2 can offset the inhibition of cell viability and the promotion of cell apoptosis induced by LPS. Circ_UBE2D2 and miR-370-3p as well as miR-370-3p and NR4A3 have targeted binding sites. MiR-370-3p inhibitor reversed the promoting effect of circ_UB2D2 silencing on viability of LPS-treated cells, but shNR4A3 neutralized the above inhibitory effect of miR-370-3p inhibitor. MiR-370-3p inhibitor weakened the down-regulation of NR4A3, Bax and Cleaved caspase-3 and the up-regulation of Bcl-2 induced by circ_UB2D2 silencing, but these trends were reversed by shNR4A3. In addition, sh-circ_UBE2D2 could alleviate the damage of rat kidney tissue. Circ_UBE2D2 mitigates the progression of SAKI in rats by targeting miR-370-3p/NR4A3 axis.
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Affiliation(s)
- Yanghui Huang
- Emergency Medicine Department, Clinical Medical College and Affiliated Hospital of Chengdu University, Sichuan Province, 610081, P.R. China,Corresponding author E-mail:
| | - Guangyu Zheng
- Emergency Medicine Department, The First People’s Hospital of Yibin, Yibin City, Sichuan Province 644000, P.R. China
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Shen MJ, Yan ST, Zhang XY, Li W, Chen X, Zheng XX, Zhang GQ, Sun LC. The circular RNA hsa_circ_0003091 regulates sepsis-induced lung injury by sponging the miR-149/Smad2 axis. Aging (Albany NY) 2022; 14:5059-5074. [PMID: 35700140 PMCID: PMC9271288 DOI: 10.18632/aging.204125] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 05/30/2022] [Indexed: 12/02/2022]
Abstract
Sepsis-induced acute lung injury (ALI) is a severe cause of death. Increasing evidence has identified circular RNAs (circRNAs) acting as critical regulators of human diseases. However, their expression pattern and underlying mechanisms in ALI remain unclear. Herein, we screened the circRNAs of ALI patients and constructed a lung injury murine model using lipopolysaccharides (LPS) induction. Functional analyses of targeted circRNA were performed in vivo and in vitro. Then, the downstream miRNA and mRNA of specific circRNAs were identified. Compared to healthy subjects, 35 circRNAs were upregulated and 9 circRNAs were downregulated in sepsis patients. The top 10 differentially expressed circRNAs were selected for validation and has_circ_0003091 was selected. The ALI mice presented significantly elevated has_circ_0003091 (mmu_circ_0015268). The functional analysis revealed that mmu_circ_0015268 contributed to the pulmonary injury, cell apoptosis, inflammatory responses, and endothelial activation in the ALI murine model. On the other hand, silencing mmu_circ_0015268 showed protective effects in LPS-treated mice and PMVECs. Furthermore, mmu_circ_0015268 sponged miR-149 to upregulate the expression of its target Smad2. In summary, we demonstrated that has_circ_0003091 might be a novel target for the management and treatment of sepsis-induced ALI.
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Affiliation(s)
- Mei-Jia Shen
- Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100193, China.,Emergency Department, China-Japan Friendship Hospital, Beijing 100029, China
| | - Shen-Tao Yan
- Emergency Department, China-Japan Friendship Hospital, Beijing 100029, China
| | - Xiao-Yan Zhang
- Department of Respiratory and Critical Care Medicine, China-Japan Friendship Hospital, Beijing 100029, China
| | - Wen Li
- Surgical Intensive Care Unit (SICU), China-Japan Friendship Hospital, Beijing 100029, China
| | - Xu Chen
- Department of Digestive, Beijing Ditan Hospital Capital Medical University, Beijing 100015, China
| | - Xiao-Xiao Zheng
- Department of Emergency, Peking University People's Hospital (PKUPH), Beijing 100044, China
| | - Guo-Qiang Zhang
- Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100193, China.,Emergency Department, China-Japan Friendship Hospital, Beijing 100029, China
| | - Li-Chao Sun
- Emergency Department, China-Japan Friendship Hospital, Beijing 100029, China
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Yang H, Zhang C, Zhao Z. Lipopolysaccharide-induced lung cell inflammation and apoptosis are enhanced by circ_0003420/miR-424-5p/TLR4 axis via inactivating the NF-κB signaling pathway. Transpl Immunol 2022; 74:101639. [PMID: 35667541 DOI: 10.1016/j.trim.2022.101639] [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: 03/24/2022] [Revised: 05/30/2022] [Accepted: 05/31/2022] [Indexed: 10/18/2022]
Abstract
BACKGROUND Circular RNAs (circRNAs) can regulate disease progression, including sepsis-induced acute lung injury (ALI). This research aimed at investigating the function of circ_0003420 in lipopolysaccharide (LPS)-treated lung cells, as well as the functional mechanism. METHODS Enzyme-linked immunosorbent assay was used for inflammation analysis. Cell viability and proliferation were examined using Cell Counting Kit-8 assay and EdU assay. Cell apoptosis was measured by flow cytometry. Western blot was used for protein detection. Reverse transcription-quantitative polymerase chain reaction assay was performed for quantification of circ_0003420, microRNA-424-5p (miR-424-5p) or toll-like receptor (TLR4). The interaction between miR-424-5p and circ_0003420 or TLR4 was conducted through dual-luciferase reporter assay and RNA immunoprecipitation (RIP) assay. RESULTS Lung cell inflammation and apoptosis were promoted, but cell viability and proliferation were inhibited by LPS. Silence of circ_0003420 attenuated the LPS-mediated lung cell injury. Circ_0003420 could interact with miR-424-5p. The protective function by knockdown of si-circ_0003420 was relieved by miR-424-5p inhibition in LPS-treated cells. TLR4 served as a downstream target of miR-424-5p. Overexpression of miR-424-5p repressed inflammatory and apoptotic damages in LPS-treated lung cells via downregulating TLR4. Circ_0003420 upregulated the TLR4 level by targeting miR-424-5p and circ_0003420 regulated the NF-κB signaling pathway through the miR-424-5p/TLR4 axis. CONCLUSION These results uncovered that circ_0003420 contributed to the LPS-induced lung cell injury via activating the miR-424-5p/TLR4-related NF-κB signaling pathway. Circ_0003420 might be a therapeutic target in sepsis-induced ALI.
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Affiliation(s)
- Hailing Yang
- Department of Critical Medicine, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - Chunmei Zhang
- Department of Critical Medicine, China-Japan Union Hospital of Jilin University, Changchun 130033, China
| | - Zhongyan Zhao
- Department of Critical Medicine, China-Japan Union Hospital of Jilin University, Changchun 130033, China.
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25
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Fan Z, Xiao T, Luo H, Chen D, Lu K, Shi W, Sun C, Bian Q. A study on the roles of long non-coding RNA and circular RNA in the pulmonary injuries induced by polystyrene microplastics. ENVIRONMENT INTERNATIONAL 2022; 163:107223. [PMID: 35390562 DOI: 10.1016/j.envint.2022.107223] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 03/17/2022] [Accepted: 03/28/2022] [Indexed: 06/14/2023]
Abstract
Microplastics (MPs) pollution has become a global concern due to its close relation to the environment and human health. Recently, more and more studies have pointed out the existence of MPs in the air, but its potential inhalation toxicity is unclear. Polystyrene Microplastics (PS-MPs) is one of the representative MPs. Besides, non-coding RNA plays crucial roles in regulating gene expression. Therefore, this study aims to provide new insights into the molecular exploration of PS-MPs inhalation. In this study, Sprague Dawley(SD)rats were treated with 100 nm, 500 nm, 1 μm and 2.5 μm PS-MPs for three days. And then intra-tracheal instillation of saline or 100 nm PS-MPs with 0, 0.5, 1 and 2 mg/200 μL were performed in SD rats every two days for two consecutive weeks. The deposition of PS-MPs was observed through immunofluorescence. Lung histological alternations were observed in haematoxylin and eosin (H&E) staining sections. The expressions of pro-inflammatory cytokines were quantified by ELISA and qPCR. Genome-wide transcriptomic profiling of long noncoding RNAs (lncRNAs), circular RNAs (circRNAs) in rats lung were done by ribosomal RNA depleted RNA sequencing and verified by qRT-PCR. We observed that 100 nm and 1 μm PS-MPs could deposite in the lungs. In addition, pathological examination shows alveolar destruction and bronchial epithelium arranged in a mess in PS-MPs groups. Furthermore, the expressions of pro-inflammatory cytokines IL-6, TNF-α and IL-1β were upregulated in PS-MPs exposed rats. Sequencing results showed that 269 circRNAs and 109 lncRNAs were differentially expressed in lung tissue of the saline and PS-MPs exposed rats. The upregulated expressions of lncRNA XLOC_031479, circRNA 014924 and circRNA 006603 and the downregulated expressions of lncRNA XLOC_014188 and circ003982 were identified by qRT-PCR in MPs group. The identified novel circRNAs and lncRNAs may paly important role in the development of lung inflammation caused by PS-MPs.
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Affiliation(s)
- Zi Fan
- The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Tian Xiao
- Institute of Toxicology and Risk Assessment, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - Hangjun Luo
- The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Dongya Chen
- Institute of Toxicology and Risk Assessment, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - Kuikui Lu
- Institute of Toxicology and Risk Assessment, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - Weiqing Shi
- Institute of Toxicology and Risk Assessment, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - Cheng Sun
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210023, PR China
| | - Qian Bian
- Institute of Toxicology and Risk Assessment, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China; Jiangsu Provincial Center for Disease Control and Prevention, NHC Key laboratory of Enteric Pathogenic Microbiology, Nanjing, Jiangsu Province, China.
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26
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Wang W, Xu R, Zhao H, Xiong Y, He P. CircEXOC5 promotes ferroptosis by enhancing ACSL4 mRNA stability via binding to PTBP1 in sepsis-induced acute lung injury. Immunobiology 2022; 227:152219. [DOI: 10.1016/j.imbio.2022.152219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 03/29/2022] [Accepted: 04/09/2022] [Indexed: 12/16/2022]
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27
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Cao S, Huang Y, Dai Z, Liao Y, Zhang J, Wang L, Hao Z, Wang F, Wang D, Liu L. Circular RNA mmu_circ_0001295 from hypoxia pretreated adipose-derived mesenchymal stem cells (ADSCs) exosomes improves outcomes and inhibits sepsis-induced renal injury in a mouse model of sepsis. Bioengineered 2022; 13:6323-6331. [PMID: 35212606 PMCID: PMC8974218 DOI: 10.1080/21655979.2022.2044720] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/29/2022] [Accepted: 02/06/2022] [Indexed: 12/29/2022] Open
Abstract
Microvascular dysfunction causes mortality in the presence of sepsis and multi-organ failure. Previous studies have demonstrated that exogenous administration of exosomes from adipose-derived mesenchymal stem cells (ADSCs) protects against sepsis, improves organ function, decreases vascular leakage and increases survival. However, the underlying regulatory mechanism was largely unknown. Therefore, in this study, a mouse sepsis model based on cecal ligation and puncture (CLP) was constructed. Exosomes from various ADSCs were intravenously administered at 4 h post CLP. Treatment with ADSC exosomes (Exo), particularly those with hypoxic pretreatment (HExo), enhanced survival, suppressed renal vascular leakage and decreased kidney dysfunction in septic mice. HExo ameliorated sepsis-induced increases in chemokine and cytokine plasma levels. Furthermore, the HExo circRNA content, determined through next-generation sequencing, revealed abundant mmu_circ_0001295. Further studies demonstrated that downregulation of exosomal mmu_circ_0001295 suppressed the exosomes' protective effects against sepsis. HExo prevented microvascular dysfunction, thus potentially improving sepsis outcomes via mmu_circ_0001295 delivery. In summary, the data indicated that HExo elongate sepsis-induced renal injury through delivering mmu_circ_0001295.
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Affiliation(s)
- Shan Cao
- Department of Pediatrics, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, Pudong, 201399China
| | - Ying Huang
- Department of Pediatrics, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, Pudong, 201399China
| | - Zhenzhao Dai
- Department of Pediatrics, Affiliated Hospital of Jinggangshan University, Jiangxi, China
| | - Yang Liao
- Department of Pediatrics, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, Pudong, 201399China
| | - Jinfeng Zhang
- Department of Pediatrics, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, Pudong, 201399China
| | - Lingli Wang
- Department of Pediatrics, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, Pudong, 201399China
| | - Zhiyan Hao
- Department of Pediatrics, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, Pudong, 201399China
| | - Fei Wang
- Department of Pediatrics, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, Pudong, 201399China
| | - Dan Wang
- Department of Pediatrics, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, Pudong, 201399China
| | - Lixiao Liu
- Department of Pediatrics, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai, Pudong, 201399China
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Zhu J, Zhong F, Chen F, Yang Y, Liao Y, Cao L, Zhou Y, Bai Q. circRNA_0001679/miR-338-3p/DUSP16 axis aggravates acute lung injury. Open Med (Wars) 2022; 17:403-413. [PMID: 35291714 PMCID: PMC8886607 DOI: 10.1515/med-2022-0417] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 10/25/2021] [Accepted: 11/24/2021] [Indexed: 12/15/2022] Open
Abstract
Acute lung injury (ALI) is a respiratory disorder characterized by acute respiratory failure. circRNA mus musculus (mmu)-circ_0001679 was reported overexpressed in septic mouse models of ALI. Here the function of circ_0001679 in sepsis-induced ALI was investigated. In vitro models and animal models with ALI were, respectively, established in mouse lung epithelial (MLE)-12 cells and C57BL/6 mice. Pulmonary specimens were harvested for examination of the pathological changes. The pulmonary permeability was examined by wet-dry weight (W/D) ratio and lung permeability index. The levels of tumor necrosis factor (TNF)-α, interleukin (IL)-6, and IL-1β in the bronchoalveolar lavage fluid (BALF), the lung tissues, and the supernatant of MLE-12 cells were measured by enzyme linked immunosorbent assay . Apoptosis was determined by flow cytometry. Bioinformatics analysis and luciferase reporter assay were used to assess the interactions between genes. We found that circ_0001679 was overexpressed in lipopolysaccharide (LPS)-stimulated MLE-12 cells. circ_0001679 knockdown suppressed apoptosis and proinflammatory cytokine production induced by LPS. Moreover, circ_0001679 bound to mmu-miR-338-3p and miR-338-3p targeted dual-specificity phosphatases 16 (DUSP16). DUSP16 overexpression reversed the effect of circ_0001679 knockdown in LPS-stimulated MLE-12 cells. Furthermore, circ_0001679 knockdown attenuated lung pathological changes, reduced pulmonary microvascular permeability, and suppressed inflammation in ALI mice. Overall, circ_0001679 knockdown inhibits sepsis-induced ALI progression through the miR-338-3p/DUSP16 axis.
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Affiliation(s)
- Jiang Zhu
- Department of Respiratory, The Second People’s Hospital of Lianyungang, Lianyungang 222023, Jiangsu, China
| | - Fukuan Zhong
- Department of Respiratory, The Second People’s Hospital of Lianyungang, Lianyungang 222023, Jiangsu, China
| | - Futao Chen
- Department of Respiratory, The Second People’s Hospital of Lianyungang, Lianyungang 222023, Jiangsu, China
| | - Yang Yang
- Department of Respiratory, The Second People’s Hospital of Lianyungang, Lianyungang 222023, Jiangsu, China
| | - Yingying Liao
- Department of Respiratory, The Second People’s Hospital of Lianyungang, Lianyungang 222023, Jiangsu, China
| | - Lifeng Cao
- Department of Respiratory, The Second People’s Hospital of Lianyungang, Lianyungang 222023, Jiangsu, China
| | - Yong Zhou
- Department of Respiratory, The Second People’s Hospital of Lianyungang, Lianyungang 222023, Jiangsu, China
| | - Qiaohong Bai
- Department of Respiratory, The Second Hospital of Nanjing, Nanjing University of Chinese Medicine, Zhongfu Road 1, Gulou District, Nanjing 210003, Jiangsu, China
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29
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Ke J, Chen M, Ma S, Zhang L, Zhang L. Circular RNA VMA21 ameliorates lung injury in septic rat via targeting microRNA-497-5p/CD2-associated protein axis. Bioengineered 2022; 13:5453-5466. [PMID: 35172672 PMCID: PMC8973665 DOI: 10.1080/21655979.2022.2031406] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Sepsis was characterized via an acute inflammatory response to infection, often accompanying by multiple organ failure, particularly lung damage. Circular RNA (circRNA) played an important role in the pathology of a variety of diseases. However, the role of circRNA in sepsis-induced lung injury (LI) remained unknown. This study was to explore the expression and role of circVMA21 in sepsis LI and the possible molecular mechanism. The results manifested circVMA21 and CD2-associated protein (CD2AP) were down-regulated in lung tissue and lipopolysaccharide (LPS)-treated BEAS-2B, while microRNA (miR)-497-5p was up-regulated. A large number of deaths in rats after surgery of 72 h were caused via cecal ligation-perforation surgery, W/D value and Bax positive cells were increased, LI was caused, cell apoptosis, tumor necrosis factor-α, Interleukin (IL)-1β and IL-6 expression were promoted and Bcl-2 positive cells were decreased. Overexpression of circVMA21 ameliorated these phenomena. In addition, LPS-induced apoptosis and inflammation of BEAS-2B cells was improved via overexpression of circVMA21, while overexpression of miR-497-5P was opposite. Apoptosis, inflammation, and oxidative damage of BEAS-2B cells were aggravated via knockdown of circVMA21, but it was reversed by knockdown of miR-497-5p or overexpression of CD2AP. Mechanistically, CircVMA21 mediated CD2AP expression through competitive adsorption of miR-497-5p. In conclusion, this work showed circVMA21 improved LI in sepsis rats by targeting miR-497-5p/CD2AP axis, suggesting that circVMA21 may be a novel therapeutic target for sepsis-induced LI.
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Affiliation(s)
- JinFang Ke
- Department of Emergency, People's Hospital of Ningxia Hui Autonomous Region, YinChuan City, NingXia Hui Autonomous Region, China
| | - MengFei Chen
- Department of Emergency, People's Hospital of Ningxia Hui Autonomous Region, YinChuan City, NingXia Hui Autonomous Region, China
| | - ShiLan Ma
- Department of Emergency, People's Hospital of Ningxia Hui Autonomous Region, YinChuan City, NingXia Hui Autonomous Region, China
| | - Liang Zhang
- Department of Emergency, People's Hospital of Ningxia Hui Autonomous Region, YinChuan City, NingXia Hui Autonomous Region, China
| | - Ling Zhang
- Department of Emergency, People's Hospital of Ningxia Hui Autonomous Region, YinChuan City, NingXia Hui Autonomous Region, China
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30
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Ren Y, Li L, Wang M, Yang Z, Sun Z, Zhang W, Cao L, Nie S. Knockdown of circRNA Paralemmin 2 Ameliorates Lipopolysaccharide-induced Murine Lung Epithelial Cell Injury by Sponging miR-330-5p to Reduce ROCK2 Expression. Immunol Invest 2022; 51:1707-1724. [PMID: 35171050 DOI: 10.1080/08820139.2022.2027961] [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] [Indexed: 11/05/2022]
Abstract
Previous data have reported the high expression of circRNA paralemmin 2 (circPALM2) in mice with acute lung injury (ALI). However, the role of circPALM2 in ALI pathogenesis remains unclear. The study aims to reveal the function of circPALM2 in ALI and the underlying mechanism. C57BL/6 J mice and murine lung epithelial-12 (MLE-12) cells were treated with lipopolysaccharide (LPS) to simulate ALI mouse and ALI cell models, respectively. Lung injury score and lung wet-to-dry ratio assays were used to evaluate the ALI mouse model. Quantitative real-time polymerase chain reaction and Western blot assays were implemented to analyze the expressions of circPALM2, microRNA-330-5p (miR-330-5p), rho-associated coiled-coil containing protein kinase 2 (ROCK2), and apoptosis-related markers. Cell viability, apoptosis, and the production of inflammatory cytokines were investigated by cell counting kit-8, flow cytometry, and enzyme-linked immunosorbent assays. The expressions of circPALM2 and ROCK2 were significantly increased, while miR-330-5p was decreased in ALI mice and LPS-induced MLE-12 cells compared with controls. LPS treatment inhibited cell viability but induced apoptosis, inflammatory cytokine production, and oxidative stress; however, these effects were attenuated after the combination of circPALM2 knockdown and LPS. CircPALM2 regulated LPS-caused MLE-12 cell damage by targeting miR-330-5p. Additionally, ROCK2, a target gene of miR-330-5p, participated in LPS-induced MLE-12 cell injury. Further, circPALM2 activated ROCK2 by associating with miR-330-5p. CircPALM2 modulated LPS-caused murine lung epithelial cell injury by the miR-330-5p/ROCK2 pathway, providing a therapeutic target for ALI.
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Affiliation(s)
- Yi Ren
- Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, PR China
| | - Liang Li
- Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, PR China
| | - Mengmeng Wang
- Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, PR China
| | - Zhizhou Yang
- Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, PR China
| | - Zhaorui Sun
- Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, PR China
| | - Wei Zhang
- Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, PR China
| | - Liping Cao
- Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, PR China
| | - Shinan Nie
- Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, PR China
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31
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Zhao D, Wang C, Liu X, Liu N, Zhuang S, Zhang Q, Bao X, Xu S, Zhou X, Meng Q, Li S, Tang L. CircN4bp1 Facilitates Sepsis-Induced Acute Respiratory Distress Syndrome through Mediating Macrophage Polarization via the miR-138-5p/EZH2 Axis. Mediators Inflamm 2021; 2021:7858746. [PMID: 35002536 PMCID: PMC8739551 DOI: 10.1155/2021/7858746] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 12/04/2021] [Accepted: 12/13/2021] [Indexed: 12/24/2022] Open
Abstract
We recently reported the differential circRNA expression patterns of the pulmonary macrophages in sepsis-induced acute respiratory distress syndrome (ARDS) mice model by microarray analysis. However, their function and hidden molecular mechanism in regulation of macrophage activation and inflammation remain poorly understood. In this study, we found that circN4bp1was overexpressed in PBMC and monocytes, and its expression levels were correlated with a poor prognosis in sepsis induced ARDS patients induced by sepsis. Knockdown of circN4bp1 inhibited the lung injury and improved the long-time survival through blunting the M1 macrophage activation in cecal ligation and puncture- (CLP-) induced ARDS mice. Moreover, bioinformatics analysis predicated a circN4bp1/miR-138-5p ceRNA network, which was confirmed by luciferase reporter assay and RNA binding protein immunoprecipitation (RIP). CircN4bp1 affected macrophage differentiation by binding to miR-138-5p, thus regulating the expression of EZH2 in vivo and ex vivo. Lastly, the m6A level of circN4bp1was found to be elevated in ARDS mice; inhibition of m6A methyltransferase METTL3 blocked this response in vitro. Therefore, circN4bp1 can function as a miR-138-5p sponge for the modulation of macrophage polarization through regulation the expression of EZH2 and may serve as a potential target and/or prognostic marker for ARDS patients following sepsis.
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Affiliation(s)
- Dongyang Zhao
- Department of Internal Emergency Medicine and Critical Care, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Chunxue Wang
- Department of Internal Emergency Medicine and Critical Care, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Xiandong Liu
- Department of Internal Emergency Medicine and Critical Care, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Na Liu
- Department of Nephrology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Shougang Zhuang
- Department of Nephrology, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
- Department of Medicine, Rhode Island Hospital and Alpert Medical School, Brown University, Providence, RI, USA
| | - Qianqian Zhang
- Department of Internal Emergency Medicine and Critical Care, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Xiaowei Bao
- Department of Internal Emergency Medicine and Critical Care, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Shumin Xu
- Department of Internal Emergency Medicine and Critical Care, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Xiaohui Zhou
- Research Center for Translational Medicine, Shanghai East Hospital, Tongji University, Shanghai 200120, China
| | - Qinshu Meng
- Research Center for Translational Medicine, Shanghai East Hospital, Tongji University, Shanghai 200120, China
| | - Shao Li
- Department of VIP Clinic, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Lunxian Tang
- Department of Internal Emergency Medicine and Critical Care, Shanghai East Hospital, Tongji University School of Medicine, Shanghai 200120, China
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32
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Liu QP, Ge P, Wang QN, Zhang SY, Yang YQ, Lv MQ, Lu Y, Li MX, Zhou DX. Circular RNA-CDR1as is involved in lung injury induced by long-term formaldehyde inhalation. Inhal Toxicol 2021; 33:325-333. [PMID: 34752207 DOI: 10.1080/08958378.2021.1999350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
OBJECTIVE Formaldehyde (FA) is known to induce lung injury, but the underlying molecular mechanism remains largely unclear. CDR1as is an important member of the circular RNAs (circRNAs) family and functions as miRNA sponges with gene-regulatory potential. Our earlier circRNA microarray data showed CDR1as was highly expressed in lung tissue exposed to FA. However, the mechanism of circRNA-CDR1as mediates the FA-exposed lung injury is still unclear. This study aimed to explore the role of CDR1as in lung injury. MATERIALS AND METHODS In this study, FA was inhaled at doses of 0.5, 2.46, and 5 mg/m3, respectively. After exposure 8 weeks, lung histopathological examination, lung injury score, and IL-1β in bronchoalveolar lavage fluid (BALF) were determined. The expressions of CDR1as, rno-miR-7b and Atg7 were detected and the potential interaction of circRNA/miRNA/mRNA was predicted by bioinformatics analysis, including drawing circRNA/miRNA/mRNA interaction network, GO and KEGG analysis. RESULTS Our results indicated FA inhalation upregulated the expression of CDR1as in lung tissues in a dose-dependent manner while the expression of rno-miR-7b decreased and Atg7 increased. Moreover, the alteration of CDR1as was positively correlated with lung injury. DISCUSSION AND CONCLUSIONS CircRNA/miRNA/mRNA prediction further explained the possible effect mechanisms of CDR1as. These data implicated that CDR1as might be a critical regulator involved in lung injury induced by FA.
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Affiliation(s)
- Qiu-Ping Liu
- Department of Pathology, Medical School, Xi'an Jiaotong University, Xi'an, China.,Respiratory Department, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China.,Xi'an People's Hospital (Xi'an Fourth Hospital), Xi'an, China
| | - Pan Ge
- Department of Pathology, Medical School, Xi'an Jiaotong University, Xi'an, China.,Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of China, Xi'an Jiaotong University, Xi'an, China
| | - Qian-Nan Wang
- Qide College, Xi'an Jiaotong University, Xi'an, China
| | - Shu-Yu Zhang
- Zonglian College, Xi'an Jiaotong University, Xi'an, China
| | - Yan-Qi Yang
- Department of Pathology, Medical School, Xi'an Jiaotong University, Xi'an, China.,Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of China, Xi'an Jiaotong University, Xi'an, China
| | - Mo-Qi Lv
- Department of Pathology, Medical School, Xi'an Jiaotong University, Xi'an, China.,Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of China, Xi'an Jiaotong University, Xi'an, China
| | - Ye Lu
- Xi'an People's Hospital (Xi'an Fourth Hospital), Xi'an, China
| | - Man-Xiang Li
- Respiratory Department, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Dang-Xia Zhou
- Department of Pathology, Medical School, Xi'an Jiaotong University, Xi'an, China.,Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education of China, Xi'an Jiaotong University, Xi'an, China
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Xiong Y, Wang Y, Tian H, Li Y, Xu Q, He Z. Circ-PRKCI Alleviates Lipopolysaccharide-induced Human Kidney 2 Cell Injury by Regulating miR-106b-5p/GAB1 Axis. J Cardiovasc Pharmacol 2021; 78:523-533. [PMID: 34269703 DOI: 10.1097/fjc.0000000000001031] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 03/19/2021] [Indexed: 11/26/2022]
Abstract
ABSTRACT Circular RNAs act as vital regulators in diverse diseases. However, the investigation of circular RNAs in sepsis-engendered acute kidney injury remains dismal. We aimed to explore the effects of circular RNA protein kinase C iota (circ-PRKCI) in lipopolysaccharide (LPS)-mediated HK2 cell injury. Sepsis in vitro model was established by LPS treatment. Quantitative real-time polymerase chain reaction assay was conducted for determining the levels of circ-PRKCI, microRNA-106b-5p (miR-106b-5p), and growth factor receptor binding 2-associated binding protein 1 (GAB1). Cell viability and apoptosis were evaluated using Cell Counting Kit-8 assay and flow cytometry analysis, respectively. The concentrations of interleukin-6, interleukin-1β, and tumor necrosis factor-α were measured with enzyme-linked immunosorbent assay kits. The levels of oxidative stress markers were determined using relevant commercial kits. Western blot assay was conducted for B-cell lymphoma-2 (Bcl-2), BCL2-Associated X (Bax), and GAB1 protein levels. Dual-luciferase reporter assay and RNA immunoprecipitation assay were used to verify the association between miR-106b-5p and circ-PRKCI or GAB1. We found the Circ-PRKCI level was decreased in sepsis patients and LPS-induced human kidney 2 (HK-2) cells. LPS exposure inhibited cell viability and facilitated apoptosis, inflammation, and oxidative stress in HK-2 cells. Circ-PRKCI overexpression abrogated the effects of LPS on cell apoptosis, inflammation, and oxidative stress in HK-2 cells. Furthermore, circ-PRKCI was identified as the sponge for miR-106b-5p to positively regulate GAB1 expression. Overexpression of circ-PRKCI relieved LPS-mediated HK-2 cell damage by sponging miR-106b-5p. MiR-106b-5p inhibition ameliorated the injury of HK-2 cells mediated by LPS, whereas GAB1 knockdown reversed the effect. Collectively, Circ-PRKCI overexpression attenuated LPS-induced HK-2 cell injury by regulating miR-106b-5p/GAB1 axis.
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Affiliation(s)
- Yueli Xiong
- Department of Infectious Diseases, Huaihe Hospital of Henan University, Kaifeng, Henan, China; and
| | - Yang Wang
- Department of Ultrasound, Huaihe Hospital of Henan University, Kaifeng, Henan, China
| | - Hui Tian
- Department of Infectious Diseases, Huaihe Hospital of Henan University, Kaifeng, Henan, China; and
| | - Yuanyuan Li
- Department of Infectious Diseases, Huaihe Hospital of Henan University, Kaifeng, Henan, China; and
| | - Qingjie Xu
- Department of Infectious Diseases, Huaihe Hospital of Henan University, Kaifeng, Henan, China; and
| | - Zhenkun He
- Department of Infectious Diseases, Huaihe Hospital of Henan University, Kaifeng, Henan, China; and
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Lv X, Zhang XY, Zhang Q, Nie YJ, Luo GH, Fan X, Yang S, Zhao QH, Li JQ. lncRNA NEAT1 aggravates sepsis-induced lung injury by regulating the miR-27a/PTEN axis. J Transl Med 2021; 101:1371-1381. [PMID: 34239033 DOI: 10.1038/s41374-021-00620-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 05/19/2021] [Accepted: 05/21/2021] [Indexed: 12/13/2022] Open
Abstract
Sepsis is an acute inflammatory reaction and a cause of acute respiratory distress syndrome (ARDS). In the present study, we explored the roles and underlying mechanism of the lncRNA Nuclear enriched abundant transcript 1 (NEAT1) in ARDS. The expression levels of genes, proteins and pro-inflammatory cytokines in patients with ARDS, LPS-stimulated cells and septic mouse models were quantified using qPCR, western blotting and ELISA assays, respectively. The molecular targeting relationship was validated by conducting a dual-luciferase reporter assay. Cell proliferation was assessed using the Cell Counting Kit-8 (CCK-8) assay. The cell cycle phase was determined by flow cytometry assay. The expression levels of NEAT1 and pro-inflammatory cytokines were higher in patients with ARDS and septic models than in controls. Knockdown of NEAT1 significantly increased cell proliferation and cycle progression and prolonged mouse survival in vitro and in vivo. Mechanistically, miR-27a was identified as a downstream target of NEAT1 and directly inhibited PTEN expression. Further rescue experiments revealed that inhibition of miR-27a impeded the promoting effects of NEAT1 silence on cell proliferation and cycle progression, whereas inhibition of PTEN markedly weakened the inhibitory effects of NEAT1 overexpression on cell proliferation and cycle progression. Altogether, our study revealed that NEAT1 plays a promoting role in the progression of ARDS via the NEAT1/miR-27a/PTEN regulatory network, providing new insight into the pathologic mechanism behind ARDS.
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Affiliation(s)
- Xia Lv
- Emergency Intensive Care Unit, Guizhou Provincial People's Hospital, Guiyang, P. R. China
| | - Xiang-Yan Zhang
- NHC Key Laboratory of Pulmonary Immune-related Diseases, Guizhou Provincial People's Hospital GZU, Guiyang, P. R. China
| | - Qian Zhang
- Department of Emergency, Guizhou Provincial People's Hospital, Guiyang, P. R. China
| | - Ying-Jie Nie
- NHC Key Laboratory of Pulmonary Immune-related Diseases, Guizhou Provincial People's Hospital GZU, Guiyang, P. R. China
| | - Guang-Heng Luo
- Department of Urinary Surgery, Guizhou Provincial People's Hospital, Guiyang, P. R. China
| | - Xia Fan
- Department of Pediatric Surgery, Guizhou Provincial People's Hospital, Guiyang, P. R. China
| | - Song Yang
- Department of Endoscope, Guizhou Provincial People's Hospital, Guiyang, P. R. China
| | - Qing-Hua Zhao
- Department of Nursing, The First Affiliated Hospital of Chongqing Medical University, Chongqing, P. R. China.
| | - Jian-Quan Li
- NHC Key Laboratory of Pulmonary Immune-related Diseases, Guizhou Provincial People's Hospital GZU, Guiyang, P. R. China.
- Intensive Care Unit, Guizhou Provincial People's Hospital, Guiyang, P. R. China.
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Li Y, Zou L, Chu L, Ye L, Ni J, Chu X, Guo T, Yang X, Zhu Z. Identification and Integrated Analysis of circRNA and miRNA of Radiation-Induced Lung Injury in a Mouse Model. J Inflamm Res 2021; 14:4421-4431. [PMID: 34511976 PMCID: PMC8422032 DOI: 10.2147/jir.s322736] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 08/24/2021] [Indexed: 12/14/2022] Open
Abstract
Background Radiation-induced lung injury (RILI) is a main threat to patients who received thoracic radiotherapy. Thus, understanding the molecular mechanism of RILI is of great importance. Circular RNAs (circRNAs) have been found to act as a regulator of multiple biological processes, and the circRNA-microRNA (miRNA)-mRNA axis could play an important role in the signaling pathway of many human diseases including radiation injury. Methods First, the circRNA and miRNA of RILI in a mouse model were investigated. The mice received 12 Gy of thoracic irradiation, and the irradiated lung tissues at 48 hours after irradiation were analyzed by RNA sequencing (RNA-seq) compared with normal lung tissues. Then, Gene Ontology analysis of the target mRNAs of the significantly differently expressed circRNAs was performed. Results In the irradiated group, inflammatory changes in lungs were observed; 21 significantly up-regulated and 33 down-regulated significantly miRNAs were identified (p < 0.05). Among 27 differentially expressed circRNAs, 10 were down-regulated and 17 were up-regulated in the irradiated group [log2 (fold change) > 1 or < −1, p<0.05]. These differentially expressed miRNAs took part in a series of cellular processes, such as positive regulation of alpha-beta T-cell proliferation, interstitial matrix, collagen fibril organization, chemokine receptor activity, cellular defense response, and B-cell receptor signaling pathway. The differentially expressed circRNAs were related to Th1 and Th2 differentiation pathways, and the predicted mRNAs were verified. Conclusion This study revealed immune-related molecular pathways play an important role in the early response after radiotherapy. In the future, research on the target mechanism and early intervention of circRNAs with associated miRNAs such as circRNA5229, circRNA544, and circRNA3340, could benefit the treatment of RILI.
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Affiliation(s)
- Yida Li
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, People's Republic of China
| | - Liqing Zou
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, People's Republic of China
| | - Li Chu
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, People's Republic of China
| | - Luxi Ye
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, People's Republic of China
| | - Jianjiao Ni
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, People's Republic of China
| | - Xiao Chu
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, People's Republic of China
| | - Tiantian Guo
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, People's Republic of China
| | - Xi Yang
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, People's Republic of China
| | - Zhengfei Zhu
- Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, People's Republic of China
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Exosomes Derived from ADSCs Attenuate Sepsis-Induced Lung Injury by Delivery of Circ-Fryl and Regulation of the miR-490-3p/SIRT3 Pathway. Inflammation 2021; 45:331-342. [PMID: 34478012 DOI: 10.1007/s10753-021-01548-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 05/28/2021] [Accepted: 08/16/2021] [Indexed: 10/20/2022]
Abstract
Sepsis-induced lung injury is a clinical syndrome characterized by injury of alveolar epithelium cells (AECs). Previous investigations illustrate that exosomes secreted from adipose-derived stem cells (ADSCs) have therapeutic effects in a variety of disease treatments, but roles and mechanisms regarding ADSC-derived exosomes in sepsis-induced lung injury are unclear. In this study, high-throughput sequencing was used to explore the molecular delivery of ADSC exosomes. A sepsis-induced lung injury mouse model and a lipopolysaccharide-induced AEC damage model were used for mechanistic analysis. The results showed that ADSC exosomes have high levels of the circular RNA (circ)-Fryl. Downregulation of circ-Fryl suppressed ADSC protective effects exosomes against sepsis-induced lung injury by decreasing apoptosis and inflammatory factor expression. Bioinformatics and luciferase reporting experiments showed that miR-490-3p and SIRT3 are downstream targets of circ-Fryl. miR-490-3p overexpression or SIRT3 silencing reversed ADSC exosome protective effects. Studying the mechanism showed that overexpression of circ-Fryl promoted autophagy activation by inducing SIRT3/AMPK signaling. Autophagy activation can suppress sepsis-induced lung injury by decreasing apoptosis and inflammatory factor expression. Taken together, our results suggest that exosomes derived from ADSCs attenuate sepsis-induced lung injury by delivery of circ-Fryl and regulation of the miR-490-3p/SIRT3 pathway.
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Qiu Y, Yu Y, Qin XM, Jiang T, Tan YF, Ouyang WX, Xiao ZH, Li SJ. CircTLK1 modulates sepsis-induced cardiomyocyte apoptosis via enhancing PARP1/HMGB1 axis-mediated mitochondrial DNA damage by sponging miR-17-5p. J Cell Mol Med 2021; 25:8244-8260. [PMID: 34410682 PMCID: PMC8419196 DOI: 10.1111/jcmm.16738] [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: 11/30/2020] [Revised: 05/10/2021] [Accepted: 06/05/2021] [Indexed: 02/06/2023] Open
Abstract
Introduction Septic cardiomyopathy is a common complication of sepsis with high morbidity and mortality, but lacks specific therapy. This study aimed to reveal the role of circTLK1 and its potential mechanisms in septic cardiomyopathy. Materials and Methods The in vitro and in vivo models of septic cardiomyopathy were established. Cell viability and apoptosis were detected by CCK8, TUNEL and flow cytometry, respectively. LDH, CK, SOD, MDA, ATP, 8‐OHdG, NAD+/NADH ratio, ROS level, mitochondrial membrane potential and cytochrome C distribution were evaluated using commercial kits. qRT‐PCR and western blotting were performed to detect RNA and protein levels. Mitochondrial DNA (mtDNA) copy number and transcription were assessed by quantitative PCR. Dual‐luciferase assay, RNA immunoprecipitation and co‐immunoprecipitation were performed to verify the interaction between circTLK1/PARP1 and miR‐17‐5p. Results CircTLK1, PARP1 and HMGB1 were up‐regulated in the in vitro and in vivo models of septic cardiomyopathy. CircTLK1 inhibition restrained LPS‐induced up‐regulation of PARP1 and HMGB1. Moreover, circTLK1 knockdown repressed sepsis‐induced mtDNA oxidative damage, mitochondrial dysfunction and consequent cardiomyocyte apoptosis by inhibiting PARP1/HMGB1 axis in vitro and in vivo. In addition, circTLK1 enhanced PARP1 expression via sponging miR‐17‐5p. Inhibition of miR‐17‐5p abolished the protective effects of circTLK1 silencing on oxidative mtDNA damage and cardiomyocyte apoptosis. Conclusion CircTLK1 sponged miR‐17‐5p to aggravate mtDNA oxidative damage, mitochondrial dysfunction and cardiomyocyte apoptosis via activating PARP1/HMGB1 axis during sepsis, indicating that circTLK1 may be a putative therapeutic target for septic cardiomyopathy.
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Affiliation(s)
- Yu Qiu
- Emergency Center, Hunan Children's Hospital, Changsha, China
| | - Ying Yu
- Department of Hepatopathy, Hunan Children's Hospital, Changsha, China
| | - Xiao-Mei Qin
- Department of Hepatopathy, Hunan Children's Hospital, Changsha, China
| | - Tao Jiang
- Department of Hepatopathy, Hunan Children's Hospital, Changsha, China
| | - Yan-Fang Tan
- Department of Hepatopathy, Hunan Children's Hospital, Changsha, China
| | - Wen-Xian Ouyang
- Department of Hepatopathy, Hunan Children's Hospital, Changsha, China
| | - Zheng-Hui Xiao
- Emergency Center, Hunan Children's Hospital, Changsha, China
| | - Shuang-Jie Li
- Department of Hepatopathy, Hunan Children's Hospital, Changsha, China
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Yu X, Wang M, Zhao H, Cao Z. Targeting a novel hsa_circ_0000520/miR-556-5p/NLRP3 pathway-mediated cell pyroptosis and inflammation attenuates ovalbumin (OVA)-induced allergic rhinitis (AR) in mice models. Inflamm Res 2021; 70:719-729. [PMID: 34028600 DOI: 10.1007/s00011-021-01472-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 05/09/2021] [Accepted: 05/11/2021] [Indexed: 01/09/2023] Open
Abstract
OBJECTIVES The circRNAs-miRNAs-mRNAs competing endogenous RNA (ceRNA) networks involve in regulating the development of various inflammation-associated diseases, including allergic rhinitis (AR), and the present study aimed to identify novel AR-associated ceRNA networks. METHODS The mRNA and protein levels of the associated genes were, respectively, examined by real-time qPCR and western blot analysis. The targeting sites in miR-556-5p and NLRP3 were validated by performing dual-luciferase reporter gene system assay. ELISA was used to measure inflammatory cytokines secretion, and CCK-8 assay was conducted to determine cell proliferation. RESULTS Here, we first identified a hsa_circ_0000520/miR-556-5p/NLRP3 signaling cascade triggered epithelium pyroptosis and inflammation to regulate the development of AR in cellular and mice models. Specifically, the pyroptosis-associated biomarkers (NLRP3, ASC, IL-1β and IL-18) and pro-inflammatory cytokines (OVA-specific IgE, TNF-α, IL-4 and IL-5) were upregulated in the nasal subjects collected from AR patients and ovalbumin (OVA)-induced AR mice models, compared to their normal counterparts. Next, using the ceRNA networks analysis software, we screened out a hsa_circ_0000520/miR-556-5p axis that potentially regulated NLRP3 in the human nasal epithelial cell line. Mechanistically, miR-556-5p targeted both hsa_circ_0000520 and 3' untranslated region (3'UTR) of NLRP3, and knock-down of hsa_circ_0000520 inactivated NLRP3-mediated epithelium pyroptosis through miR-556-5p in a ceRNA-dependent manner. Furthermore, we proved that both hsa_circ_0000520 ablation and miR-556-5p overexpression suppressed NLRP3-mediated cell pyroptosis to attenuate AR in mice models. CONCLUSIONS Taken together, we evidenced that targeting the hsa_circ_0000520/miR-556-5p/NLRP3 signaling pathway was a novel AQ1strategy to ameliorate AR progression; however, future clinical data are still required to validate our preliminary results.
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Affiliation(s)
- Xiaofeng Yu
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Sanhao Street No. 36, Shenyang, 110004, China
| | - Meng Wang
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Sanhao Street No. 36, Shenyang, 110004, China
| | - He Zhao
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Sanhao Street No. 36, Shenyang, 110004, China
| | - Zhiwei Cao
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Sanhao Street No. 36, Shenyang, 110004, China.
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Li M, Hu J, Peng Y, Li J, Ren R. CircPTK2-miR-181c-5p-HMGB1: a new regulatory pathway for microglia activation and hippocampal neuronal apoptosis induced by sepsis. Mol Med 2021; 27:45. [PMID: 33952191 PMCID: PMC8101146 DOI: 10.1186/s10020-021-00305-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 04/22/2021] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Circular RNA hsa_circ_0008305 (circPTK2), miR-181c-5p and High mobility group box-1 (HMGB1) had a targeted regulatory relationship through bioinformatics analysis. This study explained the effects of these genes in microglia and sepsis mice. METHODS Lipopolysaccharide (LPS) or Cecal Ligation and Puncture (CLP) was used to induce inflammation cell model or sepsis mouse model, as needed. Gene levels were measured by enzyme linked immunosorbent assay (ELISA), quantitative real-time PCR or Western blot, as required. Apoptosis was detected by TUNEL assay, and RNase R was used to test the stability of circPTK2. Targeting relationships between genes were analyzed using bioinformatics analysis and dual luciferase assay. Morris water maze test and mitochondrial membrane potential (MMP) detection were conducted to analyze the effects of genes on cognitive dysfunction of mice. RESULTS Lipopolysaccharide induction triggered the release of pro-inflammatory cytokines, the upregulation of HMGB1 and circPTK2, and the downregulation of miR-181c-5p in microglia. Overexpression of HMGB1 enhanced the effect of LPS, while silencing HMGB1 partially counteracted the effect of LPS. Moreover, miR-181c-5p was a target of circPTK2 and bound to HMGB1. MiR-181c-5p mimic partially reversed the functions of LPS and HMGB1 overexpression, reduced the levels of TNF-α, IL-1β, and HMGB1, and inhibited apoptosis. CircPTK2 knockdown had the same effect as miR-181c-5p up-regulation. In vivo, sicircPTK2 improved cognitive function, restored MMP level, inhibited apoptosis, reduced the levels of inflammatory factors and apoptotic factors, and increased the survival rate of CLP-induced mice. CONCLUSION Our research reveals that circPTK2 regulates microglia activation and hippocampal neuronal apoptosis induced by sepsis via miR-181c-5p-HMGB1 signaling.
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Affiliation(s)
- Min Li
- Neuroscience Intensive Care Unit, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88, Jiefang Road, Hangzhou, 310009, Zhejiang Province, China.
| | - Junwen Hu
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88, Jiefang Road, Hangzhou, 310009, Zhejiang Province, China
| | - Yucong Peng
- Department of Neurosurgery, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88, Jiefang Road, Hangzhou, 310009, Zhejiang Province, China
| | - Jingbo Li
- Neuroscience Intensive Care Unit, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88, Jiefang Road, Hangzhou, 310009, Zhejiang Province, China
| | - Reng Ren
- Neuroscience Intensive Care Unit, The Second Affiliated Hospital of Zhejiang University School of Medicine, No. 88, Jiefang Road, Hangzhou, 310009, Zhejiang Province, China
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Activation of TREM-1 induces endoplasmic reticulum stress through IRE-1α/XBP-1s pathway in murine macrophages. Mol Immunol 2021; 135:294-303. [PMID: 33957479 DOI: 10.1016/j.molimm.2021.04.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Revised: 04/16/2021] [Accepted: 04/26/2021] [Indexed: 12/14/2022]
Abstract
Increasing evidence suggests that endoplasmic reticulum (ER) stress activates several pro-inflammatory signaling pathways in many diseases, including acute lung injury (ALI). We have reported that blocking triggering receptor expressed on myeloid cells 1 (TREM-1) protects against ALI by suppressing pulmonary inflammation in mice with ALI induced by lipopolysaccharides (LPS). However, the molecular mechanism underlying the TREM-1-induced pro-inflammatory microenvironment in macrophages remains unclearly. Herein, we aimed to determine whether TREM-1 regulates the inflammatory responses induced by LPS associated with ER stress activation. We found that the activation of TREM-1 by a monoclonal agonist antibody (anti-TREM-1) increased the mRNA and protein levels of IL-1β, TNF-α, and IL-6 in primary macrophages. Treatment of the anti-TREM-1 antibody increased the expression of ER stress markers (ATF6, PERK, IRE-1α, and XBP-1s) in primary macrophages. While pretreatment with 4-PBA, an inhibitor of ER stress, significantly inhibited the expression of ER stress markers and pro-inflammatory cytokines and reduced LDH release. Furthermore, inhibiting the activity of the IRE-1α/XBP-1s pathway by STF-083010 significantly mitigated the increased levels of IL-1β, TNF-α, and IL-6 in macrophages treated by the anti-TREM-1 antibody. XBP-1 silencing attenuated pro-inflammatory microenvironment evoked by activation of TREM-1. Besides, we found that blockade of TREM-1 with LR12 ameliorated ER stress induced by LPS in vitro and in vivo. In conclusion, we conclude that TREM-1 activation induces ER stress through the IRE-1α/XBP-1s pathway in macrophages, contributing to the pro-inflammatory microenvironment.
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Qi L, Yan Y, Chen B, Cao J, Liang G, Xu P, Wang Y, Ren Y, Mao G, Huang Z, Xu C, Jiang H. Research progress of circRNA as a biomarker of sepsis: a narrative review. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:720. [PMID: 33987418 PMCID: PMC8106021 DOI: 10.21037/atm-21-1247] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Objective Explore the possibility of circRNAs as markers of sepsis. Background Sepsis is an abnormal immune response of our body to infection that can lead to organ failure and death. Although the research on sepsis has been extensive in the past few years, sepsis-associated morbidity and mortality are still increasing. Early diagnosis and early treatment are important for patients with sepsis. Although many markers, including procalcitonin and C-reactive protein, have been proposed as diagnostic indicators of sepsis, there are still challenges in the early diagnosis and treatment of sepsis due to the lack of sensitivity and specificity of these substances. Recently, a large number of studies have found that circular RNAs (circRNAs) participate in a variety of biological functions, such as immune response, regulating the expression of miRNAs, and they are closely related to the occurrence and development of many diseases, including sepsis. However, the clear mechanism of the role of circRNAs has not been fully elucidated. An increasing number of studies have confirmed that circRNAs have potential in the diagnosis and treatment of sepsis. By studying the regulatory mechanism of circRNAs in sepsis, we can search for new molecular intervention targets for the treatment of sepsis, which is conducive to the development of new molecular therapeutic drugs for sepsis. Methods In the present study, we summarize and analyze the role of circRNAs in the pathogenesis of sepsis and discuss the possibility of circRNA as a biomarker for the diagnosis of sepsis. Conclusions The biological characteristics of circRNAs and their role in the occurrence and development of sepsis make them possible markers of sepsis.
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Affiliation(s)
- Lei Qi
- Department of Emergency Medicine, Affiliated Hospital of Nantong University, Nantong, China.,Rugao Branch Institute, Affiliated Hospital of Nantong University, Nantong, China
| | - Yan Yan
- Department of Emergency Medicine, Affiliated Hospital of Nantong University, Nantong, China
| | - Bairong Chen
- Department of Medical Laboratory, School of Public Health, Nantong University, Nantong, China
| | - Jiling Cao
- Department of Emergency Medicine, Affiliated Hospital of Nantong University, Nantong, China
| | - Guiwen Liang
- Department of Emergency Medicine, Affiliated Hospital of Nantong University, Nantong, China
| | - Pan Xu
- Department of Emergency Medicine, Affiliated Hospital of Nantong University, Nantong, China
| | - Yue Wang
- Department of Emergency Medicine, Affiliated Hospital of Nantong University, Nantong, China
| | - Yuting Ren
- Department of Emergency Medicine, Affiliated Hospital of Nantong University, Nantong, China
| | - Guomin Mao
- Department of Emergency Medicine, Affiliated Hospital of Nantong University, Nantong, China
| | - Zhongwei Huang
- Department of Emergency Medicine, Affiliated Hospital of Nantong University, Nantong, China
| | - Cheng Xu
- Department of Medical Imaging, Affiliated Hospital of Nantong University, Nantong, China
| | - Haiyan Jiang
- Department of Emergency Medicine, Affiliated Hospital of Nantong University, Nantong, China
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Xiong H, Wang H, Yu Q. Circular RNA circ_0003420 mediates inflammation in sepsis-induced liver damage by downregulating neuronal PAS domain protein 4. Immunopharmacol Immunotoxicol 2021; 43:271-282. [PMID: 33719821 DOI: 10.1080/08923973.2021.1887212] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
OBJECTIVE Our aim was to investigate whether circular RNA (circRNA) circ_0003420 mediates inflammation in sepsis-induced liver damage and to determine the mechanism involved. MATERIALS AND METHODS Liver tissue samples from patients with sepsis and healthy subjects were used to identify differentially expressed circRNAs. Additionally, Kupffer cells were treated with lipopolysaccharide (LPS) to establish an in vitro model of sepsis-induced liver damage. Cell viability and proliferation were measured with a cell counting kit-8 and 5-ethynyl-2'-deoxyuridine (EdU) labeling, respectively. Relative mRNA and protein levels of IL-6, IL-1β, tumor necrosis factor (TNF)-α, and neuronal PAS domain protein 4 (NPAS4) were determined via reverse-transcription quantitative PCR and western blotting, respectively. RESULTS We observed circ_0003420 upregulation accompanied by NPAS4 downregulation in liver samples from patients with sepsis-associated damage and in Kupffer cells treated with LPS. Results of in vitro experiments indicated that LPS treatment reduced cell viability and induced well-pronounced apoptosis and inflammatory signs. Circ_0003420 silencing counteracted LPS's influence on cell proliferation, apoptosis, and inflammation signs. Bioinformatics and a dual-luciferase reporter assay revealed that circ_0003420 targets NPAS4 mRNA and negatively correlates with NPAS4 expression. Moreover, NPAS4 knockdown recovered the apoptosis rate and expression levels of inflammatory cytokines in the LPS-treated circ_0003420 knockdown cells, whereas NPAS4 overexpression had similar effects on Kupffer cell properties as circ_0003420 silencing. CONCLUSION We demonstrate that circ_0003420 targets NPAS4 mRNA thereby mediating the cell damage and inflammation caused by LPS. This study provides a possible target for treatment of liver damage induced by sepsis.
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Affiliation(s)
- Huawei Xiong
- Department of Emergency, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Hao Wang
- Department of Emergency, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Qichun Yu
- Department of Orthopedics, The First Affiliated Hospital of Nanchang University, Nanchang, China
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Gao J, Teng L, Yang S, Huang S, Li L, Zhou L, Liu G, Tang H. MNK as a potential pharmacological target for suppressing LPS-induced acute lung injury in mice. Biochem Pharmacol 2021; 186:114499. [PMID: 33675774 PMCID: PMC7957947 DOI: 10.1016/j.bcp.2021.114499] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 02/24/2021] [Accepted: 02/25/2021] [Indexed: 12/13/2022]
Abstract
Acute lung injury (ALI) or its more severe form, known as acute respiratory distress syndrome (ARDS), is characterized by an initial exudative phase, expression of proinflammatory mediators, activation of inflammatory leukocytes, and impairment of the lung endothelium and epithelium. Despite numerous, novel therapeutic strategies have been developed regarding the pathophysiology of ALI, current treatment is mainly supportive, as specific therapies have not been established in the past few decades. The MAP kinase-interacting kinases (MNK1 and MNK2) are serine threonine kinases which are activated by mitogen-activated protein kinases (MAPKs), regulate protein synthesis by phosphroylating eukaryotic translation initiation factor 4E (eIF4E). Although studies have shown that MAPKs pathway is involved in anti-inflammatory and preventing tissue injury processes, the role of MNKs in ALI has, until now, remained relatively unexplored. Here, we investigated whether partial inhibition of MAPKs pathway by targeting MNKs was effective in the prevention and treatment of ALI. C57BL6 mice were pretreated with MNK1 and MNK2 inhibitor (CGP57380, 30 mg/kg) for 30 min and then challenged with 5 mg/kg LPS for 6 h. The results showed that pretreatment with CGP57380 not only significantly attenuated LPS-induced lung wet/dry ratio, as well as protein content, total cells and neutrophils in bronchoalveolar lavage fluid (BALF), but also decreased the production of pro-inflammatory mediators such as interleukin-6 (IL-6), tumor necrosis factor alpha (TNF-α) and keratinocyte-derived chemoattractant (KC). In addition, CGP57380 was observed to significantly suppress LPS-stimulated phosphorylation of eIF4E and MAPKs in the mouse bone marrow-derived macrophages (BMDMs). The involvement of MNK2 in lung injury was further evident by MNK2 knockout mice. MNK2 deficiency resulted in the attenuated lung histopathological changes, as also reflected by reductions in neutrophil counts, and the less LPS-induced the production of IL-6, TNF-α and KC in mouse BALF. Taken together, these findings demonstrated for the first time that MNK inhibition could effectively reduce the LPS-induced ALI in mice, suggesting a novel and potential application for MNK-based therapy to treat this serious disease.
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Affiliation(s)
- Jianfeng Gao
- Center for Animal Experiment, State Key Laboratory of Virology, Wuhan University, Wuhan 430071, China
| | - Li Teng
- Department of Pathology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430015, China
| | - Sijun Yang
- Center for Animal Experiment, State Key Laboratory of Virology, Wuhan University, Wuhan 430071, China
| | - Shuguang Huang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
| | - Linrui Li
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
| | - Li Zhou
- Center for Animal Experiment, State Key Laboratory of Virology, Wuhan University, Wuhan 430071, China
| | - Guoquan Liu
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
| | - Hongbin Tang
- Center for Animal Experiment, State Key Laboratory of Virology, Wuhan University, Wuhan 430071, China.
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Wu J, Zhao R, Dai J, Lai G, Khan AU, Yu X, Wu S, Ouyang J, Sang H. Analysis of differential expression of long non‑coding RNAs in exosomes derived from mature and immature dendritic cells. Mol Med Rep 2021; 23:132. [PMID: 33313954 PMCID: PMC7751491 DOI: 10.3892/mmr.2020.11771] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 11/09/2020] [Indexed: 12/12/2022] Open
Abstract
Dendritic cells release bioactive exosomes involved in immune regulation. Long non‑coding RNAs (lncRNAs) are implicated in a number of immunoregulatory mechanisms. However, the roles of lncRNAs in dendritic cell‑derived exosomes remain to be elucidated. The present study aimed to investigate the roles of lncRNAs in exosomes derived from mature and immature dendritic cells and to find specific lncRNAs with immunoregulatory function. The expression profiles of lncRNAs in exosomes derived from bone marrow dendritic cells of C57 mice were illustrated. Gene Ontology (GO), Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses and Gene Set Enrichment Analysis were performed to identify potential targets correlated with immune regulation. In addition, lncRNA‑miRNA‑mRNA networks were predicted using bioinformatics methods. Representative lncRNAs were further validated via reverse transcription‑quantitative PCR. A total of 437 lncRNAs were analyzed using RNA‑seq. Among these, the expression of ~87 lncRNAs was upregulated and 21 lncRNAs was downregulated in mature dendritic cell‑derived exosomes (Dex) compared with immature Dex. GO analyses indicated the involvement of upregulated lncRNAs in multiple biological functions, such as the immune system process, while downregulated lncRNAs were involved in poly(A) RNA binding. Analysis of the KEGG pathway identified the relationship of TNF signaling and ribosome pathway with upregulated lncRNAs and downregulated lncRNAs, respectively. The results of gene set enrichment analysis identified that three lncRNA‑associated transcripts (Procr‑203, Clec4e‑202 and Traf1‑203) were highly associated with immunoregulatory functions including T helper cell differentiation and Janus kinase‑STAT signaling pathway. The results indicated the involvement of candidate lncRNAs in immunoregulation and suggested a new perspective on the modulation of lncRNAs in Dex.
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Affiliation(s)
- Jiachang Wu
- Department of Orthopedic Surgery, Shenzhen Hospital of Southern Medical University, Shenzhen, Guangdong 518000, P.R. China
- The Third School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Renli Zhao
- Department of Orthopedic Surgery, Shenzhen Hospital of Southern Medical University, Shenzhen, Guangdong 518000, P.R. China
- The Third School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Jingxing Dai
- Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangdong Provincial Medical Biomechanical Key Laboratory, Guangzhou, Guangdong 510515, P.R. China
| | - Guohua Lai
- Department of Orthopedic Surgery, Shenzhen Hospital of Southern Medical University, Shenzhen, Guangdong 518000, P.R. China
- The Third School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Asmat Ullah Khan
- Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangdong Provincial Medical Biomechanical Key Laboratory, Guangzhou, Guangdong 510515, P.R. China
| | - Xiao Yu
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Sha Wu
- Department of Immunology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
| | - Jun Ouyang
- Department of Anatomy, School of Basic Medical Sciences, Southern Medical University, Guangdong Provincial Medical Biomechanical Key Laboratory, Guangzhou, Guangdong 510515, P.R. China
| | - Hongxun Sang
- Department of Orthopedic Surgery, Shenzhen Hospital of Southern Medical University, Shenzhen, Guangdong 518000, P.R. China
- The Third School of Clinical Medicine, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
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Xu C, Luo Y, Ntim M, Quan W, Li Z, Xu Q, Jiang L, Zhang J, Shang D, Li L, Zhang G, Chen H. Effect of emodin on long non-coding RNA-mRNA networks in rats with severe acute pancreatitis-induced acute lung injury. J Cell Mol Med 2021; 25:1851-1866. [PMID: 33438315 PMCID: PMC7882958 DOI: 10.1111/jcmm.15525] [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: 02/08/2020] [Revised: 05/11/2020] [Accepted: 05/24/2020] [Indexed: 12/13/2022] Open
Abstract
Long non-coding RNAs (lncRNAs) contribute to disease pathogenesis and drug treatment effects. Both emodin and dexamethasone (DEX) have been used for treating severe acute pancreatitis-associated acute lung injury (SAP-ALI). However, lncRNA regulation networks related to SAP-ALI pathogenesis and drug treatment are unreported. In this study, lncRNAs and mRNAs in the lung tissue of SAP-ALI and control rats, with or without drug treatment (emodin or DEX), were assessed by RNA sequencing. Results showed both emodin and DEX were therapeutic for SAP-ALI and that mRNA and lncRNA levels differed between untreated and treated SAP-ALI rats. Gene expression profile relationships for emodin-treated and control rats were higher than DEX-treated and -untreated animals. By comparison of control and SAP-ALI animals, more up-regulated than down-regulated mRNAs and lncRNAs were observed with emodin treatment. For DEX treatment, more down-regulated than up-regulated mRNAs and lncRNAs were observed. Functional analysis demonstrated both up-regulated mRNA and co-expressed genes with up-regulated lncRNAs were enriched in inflammatory and immune response pathways. Further, emodin-associated lncRNAs and mRNAs co-expressed modules were different from those associated with DEX. Quantitative polymerase chain reaction demonstrates selected lncRNA and mRNA co-expressed modules were different in the lung tissue of emodin- and DEX-treated rats. Also, emodin had different effects compared with DEX on co-expression network of lncRNAs Rn60_7_1164.1 and AABR07062477.2 for the blue lncRNA module and Nrp1 for the green mRNA module. In conclusion, this study provides evidence that emodin may be a suitable alternative or complementary medicine for treating SAP-ALI.
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Affiliation(s)
- Caiming Xu
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, China.,Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, China
| | - Yalan Luo
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, China.,Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, China
| | - Michael Ntim
- Department of Physiology, Dalian Medical University, Dalian, China
| | - Weili Quan
- Center for Genome Analysis, ABLife Inc, Wuhan, China
| | - Zhaoxia Li
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, China.,Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, China
| | - Qiushi Xu
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, China.,Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, China
| | - Liu Jiang
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, China.,Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, China
| | - Jingwen Zhang
- Endoscopy Center, The First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Dong Shang
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, China.,Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, China
| | - Lei Li
- Department of Vascular Surgery, The Second Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Guixin Zhang
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, China.,Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, China
| | - Hailong Chen
- Department of General Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian, China.,Institute (College) of Integrative Medicine, Dalian Medical University, Dalian, China
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Zou Z, Wang Q, Zhou M, Li W, Zheng Y, Li F, Zheng S, He Z. Protective effects of P2X7R antagonist in sepsis-induced acute lung injury in mice via regulation of circ_0001679 and circ_0001212 and downstream Pln, Cdh2, and Nprl3 expression. J Gene Med 2020; 22:e3261. [PMID: 32783373 DOI: 10.1002/jgm.3261] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 08/07/2020] [Accepted: 08/07/2020] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND Sepsis induces pulmonary P2X7 receptor (P2X7 R) expression and P2X7 R-knockout reduced lung inflammation in mice. The present study investigated the expression of circular RNA (circRNA) and mRNA in sepsis-induced acute lung injury (ALI) treated with a P2X7 R antagonist. METHODS Sepsis was induced by tracheal administration of lipopolysaccharide (LPS), and the mice were then divided into two groups: without [sepsis + dimethyl sulfoxide (DMSO)] or with P2X7 R antagonist treatment (sepsis + P2X7 A). Sham mice were administrated sterile normal saline. Serum levels of interleukin (IL)-1β and tumor necrosis factor (TNF)-α, pathological changes, cell apoptosis and P2X7 R expression in lung were assessed, followed by RNA sequencing (RNA-seq) and bioinformatics analyses. A quantitative reverse transcriptase-polymerase chain reaction (RT-qPCR) was used to validate circRNAs and mRNAs. RESULTS Compared to the sham group, LPS-induced sepsis produced obvious pathological changes in lung tissue, as well as increased apoptotic lung cells, serum TNF-α and IL-1β levels, and P2X7 R expression; P2X7 R antagonism significantly ameliorated these changes. RNA-seq identified many dysregulated circRNAs and mRNAs during sepsis, whereas this changed with P2X7 R antagonism. RT-qPCR confirmed that Mus musculus (mmu)_circ_0001679, mmu_circ_0001212, phospholamban (Pln), cadherin-2 (Cdh2) and nitrogen permease regulator 3-like (Nprl3) expression were significantly increased in the sepsis + DMSO group compared to that in the sham group but were decreased in the sepsis + P2X7 A group compared to that in the sepsis + DMSO group. The circRNA-microRNA-mRNA coexpression network indicated that mmu_circ_0001679 may regulate Nprl3 and that mmu_circ_0001212 may similarly regulate Pln, Cdh2 and Nprl3 as a competing endogenous RNA. CONCLUSIONS P2X7 R antagonism attenuates sepsis-induced ALI by inhibiting dysregulated expression of circRNA (circ_0001679, circ_0001212) and mRNA (Pln, Cdh2 and Nprl3).
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Affiliation(s)
- Zijun Zou
- Department of ICU, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - Qin Wang
- Department of pediatrics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - Minggen Zhou
- Department of ICU, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - Weichao Li
- Department of ICU, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - Yikai Zheng
- Department of ICU, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - Fanyi Li
- Department of ICU, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - Shengcai Zheng
- Department of ICU, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
| | - Zhijie He
- Department of ICU, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong Province, China
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Quietness of circular RNA circ_0054633 alleviates the inflammation and proliferation in lipopolysaccharides-induced acute lung injury model through NF-κB signaling pathway. Gene 2020; 766:145153. [PMID: 32950633 DOI: 10.1016/j.gene.2020.145153] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 08/20/2020] [Accepted: 09/11/2020] [Indexed: 02/07/2023]
Abstract
AIM Acute lung injury (ALI) is the mild form of acute respiratory distress syndrome (ARDS) which is a common lung disease with a high incidence and mortality rate. Recent studies manifested that some circular RNAs were associated with ALI. In this study, we aimed to uncover the effect of circular RNA circ_0054633 on ALI initiation and progression and proposed a new mechanism related to ALI. METHODS The lipopolysaccharides (LPS)-induced acute lung injury model were build both in vivo of rat and in vitro of primary murine pulmonary microvascular endothelial cells (MPVECs). Hematoxylin and eosin (H&E) was employed to observe the tissue morphology and estimate the degree of lung damage. We used real-time quantitative polymerase chain reaction (RT-qPCR) to measure the expression level of circ_0054633. The expression levels of inflammatory cytokines IL-17A and tumor necrosis factor-α (TNF-α) were detected by ELISA. The effects of circ_0054633 on MPVECs proliferation and apoptosis were detected with the help of CCK-8 and apoptosis assay, separately. The expression level of NF-κB p65 protein was measured by Western blot. RESULTS circ_0054633, IL-17A, TNF-α and NF-κB p65 were all overexpressed in LPS-treated rat and MPVECs, and LPS enhanced the proliferation and apoptosis of MPVECs. While circ_0054633 silencing reversed the above promotion effects of LPS on IL-17A, TNF-α expression and MPVECs proliferation and apoptosis. CONCLUSIONS Quietness of circ_0054633 alleviated LPS-induced ALI via NF-κB signaling pathway, implicating circ_0054633 may be a potential biomarker for diagnose and therapy of ALI.
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Liu S, Zhang D, Liu Y, Zhou D, Yang H, Zhang K, Zhang D. Circular RNA circ_0001105 protects the intestinal barrier of septic rats by inhibiting inflammation and oxidative damage and YAP1 expression. Gene 2020; 755:144897. [DOI: 10.1016/j.gene.2020.144897] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 05/28/2020] [Accepted: 06/10/2020] [Indexed: 12/11/2022]
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Nie MW, Han YC, Shen ZJ, Xie HZ. Identification of circRNA and mRNA expression profiles and functional networks of vascular tissue in lipopolysaccharide-induced sepsis. J Cell Mol Med 2020; 24:7915-7927. [PMID: 32452125 PMCID: PMC7348180 DOI: 10.1111/jcmm.15424] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/04/2020] [Accepted: 05/07/2020] [Indexed: 12/28/2022] Open
Abstract
Sepsis is the most common cause of death in intensive care units. This study investigated the circular RNA (circRNA) and mRNA expression profiles and functional networks of the aortic tissue in sepsis. We established a lipopolysaccharide (LPS)‐induced rat sepsis model. High‐throughput sequencing was performed on the aorta tissue to identify differentially expressed (DE) circRNAs and mRNAs, which were validated by real‐time quantitative polymerase chain reaction (RT‐qPCR). Bioinformatic analysis was carried out and coding and non‐coding co‐expression (CNC) and competing endogenous RNA (ceRNA) regulatory networks were constructed to investigate the mechanisms. In total, 373 up‐regulated and 428 down‐regulated circRNAs and 2063 up‐regulated and 2903 down‐regulated mRNAs were identified. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses of mRNAs showed that the down‐regulated genes were mainly enriched in the process of energy generation. CNC and ceRNA regulatory networks were constructed with seven DE circRNAs. The results of functional enrichment analysis of CNC target genes revealed the important role of circRNAs in inflammatory response. The ceRNA network also highlighted the significant enrichment in calcium signalling pathway. Significant alterations in circRNAs and mRNAs were observed in the aortic tissue of septic rats. In addition, CNC and ceRNA networks were established.
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Affiliation(s)
- Mu-Wen Nie
- Department of Cardiology, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, China
| | - Ye-Chen Han
- Department of Cardiology, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, China
| | - Zhu-Jun Shen
- Department of Cardiology, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, China
| | - Hong-Zhi Xie
- Department of Cardiology, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College Hospital, Beijing, China
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Liu J, Liu Y, Zhang L, Chen Y, Du H, Wen Z, Wang T, Chen D. Down-regulation of circDMNT3B is conducive to intestinal mucosal permeability dysfunction of rats with sepsis via sponging miR-20b-5p. J Cell Mol Med 2020; 24:6731-6740. [PMID: 32383354 PMCID: PMC7299677 DOI: 10.1111/jcmm.15324] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 03/23/2020] [Accepted: 04/01/2020] [Indexed: 12/13/2022] Open
Abstract
Sepsis is a life‐threatening syndrome with a high risk of mortality, which is caused by the dysregulated host response to infection. We examined significant roles of circDMNT3B and miR‐20b‐5p in the intestinal mucosal permeability dysfunction of rats with sepsis. SD rats were randomly divided into 6 groups (n = 10/group): sham group, sepsis group, si‐negative control group, circDNMT3B‐si1 group, circDNMT3B‐si2 group and circDNMT3B‐si1 + anti‐miR‐20b‐5p group. The level of malondialdehyde (MDA) content, superoxide dismutase (SOD) activity, interleukin (IL)‐6 and IL‐10 levels were measured through ELISA assay kits. Cell survival rate and cell apoptosis were evaluated by Cell‐Counting Kit‐8 Assay and flow cytometry, respectively. Luciferase reporter assays were used to investigate interactions between miR‐20b‐5p circDMNT3B in HEK‐293T cells. Silencing circDNMT3B can significantly increase the level of d‐lactic acid, FD‐40, MDA, diamine oxidase, IL‐10 and IL‐6, compared with sepsis group, while the SOD activity was lower. Silencing circDNMT3B leads to oxidative damage and influence inflammatory factors level in intestinal tissue. CircDNMT3B was identified as a target gene of miR‐20b‐5p. Silencing circDNMT3B decreased cell survival and induced apoptosis in Caco2 cells treated with LPS, which was reversed by anti‐miR‐20b‐5p. MiR‐20b‐5p inhibitor remarkably down‐regulated mentioned‐above levels, in addition to up‐regulate SOD activity, which may relieve the damage of intestinal mucosal permeability caused by silencing circDNMT3B in sepsis rats. Down‐regulation of circDMNT3B was conducive to the dysfunction of intestinal mucosal permeability via sponging miR‐20b‐5p in sepsis rats, which may provide the novel strategy for sepsis treatment in the future.
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Affiliation(s)
- Jiao Liu
- Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Critical Care Medicine, Ruijin Hospital North, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yongan Liu
- Department of Critical Care Medicine, Ruijin Hospital North, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Lidi Zhang
- Department of Critical Care Medicine, Ruijin Hospital North, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yizhu Chen
- Department of Critical Care Medicine, Ruijin Hospital North, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hangxiang Du
- Department of Critical Care Medicine, Ruijin Hospital North, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhenliang Wen
- Department of Critical Care Medicine, Ruijin Hospital North, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Tao Wang
- Department of Critical Care Medicine, Ruijin Hospital North, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Dechang Chen
- Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Department of Critical Care Medicine, Ruijin Hospital North, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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