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Zhang H, Deng Z, Wang Y, Zheng X, Zhou L, Yan S, Wang Y, Dai Y, Kanwar YS, Chen F, Deng F. CHIP drives proteasomal degradation of NUR77 to alleviate oxidative stress and intrinsic apoptosis in cisplatin-induced nephropathy. Commun Biol 2024; 7:1403. [PMID: 39462094 DOI: 10.1038/s42003-024-07118-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Accepted: 10/22/2024] [Indexed: 10/28/2024] Open
Abstract
Carboxy-terminus of Hsc70-interacting protein (CHIP), an E3 ligase, modulates the stability of its targeted proteins to alleviate various pathological perturbations in various organ systems. Cisplatin is a widely used chemotherapeutic agent, but it is also known for its alarming renal toxicity. The role of CHIP in the pathogenesis of cisplatin-induced acute kidney injury (AKI) has not been adequately investigated. Herein, we demonstrated that CHIP was abundantly expressed in the renal proximal tubular epithelia, and its expression was downregulated in cisplatin-induced AKI. Further investigation revealed that CHIP overexpression or activation alleviated, while its gene disruption promoted, oxidative stress and apoptosis in renal proximal tubular epithelia induced by cisplatin. In terms of mechanism, CHIP interacted with and ubiquitinated NUR77 to promote its degradation, which consequently shielded BCL2 to maintain mitochondrial permeability of renal proximal tubular cells in the presence of cisplatin. Also, we demonstrated that CHIP interacted with NUR77 via its central coiled-coil (CC) domain, a non-canonical interactive pattern. In conclusion, these findings indicated that CHIP ubiquitinated and degraded its substrate NUR77 to attenuate intrinsic apoptosis in cisplatin-treated renal proximal tubular epithelia, thus providing a novel insight for the pathogenesis of cisplatin-induced AKI.
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Affiliation(s)
- Hao Zhang
- Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Zebin Deng
- Department of Urology, The Second Xiangya Hospital at Central South University, Changsha, Hunan, 410011, China
- Department of Nephrology, The Second Xiangya Hospital at Central South University, Changsha, Hunan, 410011, China
| | - Yilong Wang
- Department of Cardiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xiaoping Zheng
- Department of Urology, The Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, Guangdong, China
| | - Lizhi Zhou
- Department of Urology, The Second Xiangya Hospital at Central South University, Changsha, Hunan, 410011, China
| | - Shu Yan
- Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Yinhuai Wang
- Department of Urology, The Second Xiangya Hospital at Central South University, Changsha, Hunan, 410011, China
| | - Yingbo Dai
- Department of Urology, The Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai, Guangdong, China
| | - Yashpal S Kanwar
- Departments of Pathology & Medicine, Northwestern University, Chicago, IL, USA
| | - Fangzhi Chen
- Department of Urology, The Second Xiangya Hospital at Central South University, Changsha, Hunan, 410011, China.
| | - Fei Deng
- Department of Urology, The Second Xiangya Hospital at Central South University, Changsha, Hunan, 410011, China.
- Department of Nephrology, The Second Xiangya Hospital at Central South University, Changsha, Hunan, 410011, China.
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Kawana S, Okazaki M, Sakaue T, Hashimoto K, Nakata K, Choshi H, Tanaka S, Miyoshi K, Ohtani S, Ohara T, Sugimoto S, Matsukawa A, Toyooka S. Loss of Nr4a1 ameliorates endothelial cell injury and vascular leakage in lung transplantation from circulatory-death donor. J Heart Lung Transplant 2024:S1053-2498(24)01878-3. [PMID: 39369968 DOI: 10.1016/j.healun.2024.09.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 09/20/2024] [Accepted: 09/28/2024] [Indexed: 10/08/2024] Open
Abstract
BACKGROUND Ischemia-reperfusion injury (IRI) stands as a major trigger for primary graft dysfunction (PGD) in lung transplantation (LTx). Especially in LTx from donation after cardiac death (DCD), effective control of IRI following warm ischemia (WIRI) is crucial to prevent PGD. This study aimed to identify the key factors affecting WIRI in LTx from DCD. METHODS Previously reported RNA-sequencing dataset of lung WIRI was reanalyzed to identify nuclear receptor subfamily 4 group A member 1 (NR4A1) as the immediate early gene for WIRI. Dynamics of NR4A1 expression were verified using a mouse hilar clamp model. To investigate the role of NR4A1 in WIRI, a mouse model of LTx from DCD was established using Nr4a1 knockout (Nr4a1-/-) mice. RESULTS NR4A1 was located around vascular cells, and its protein levels in the lungs increased rapidly and transiently during WIRI. LTx from Nr4a1-/- donors significantly improved pulmonary graft function compared to wild-type donors (P < 0.001). Histological analysis showed decreased microvascular endothelial cell death (P = 0.007), neutrophil infiltration (P < 0.001), and albumin leakage (P < 0.001). Evans blue permeability assay demonstrated maintained pulmonary microvascular barrier integrity in grafts from Nr4a1-/- donors, correlating with diminished pulmonary edema (P < 0.001). However, NR4A1 did not significantly affect the inflammatory response during WIRI, and IRI was not suppressed when a wild-type donor lung was transplanted into the Nr4a1-/- recipient. CONCLUSIONS Donor NR4A1 plays a specialized role in the positive regulation of endothelial cell injury and microvascular hyperpermeability. These findings demonstrate the potential of targeting NR4A1 interventions to alleviate PGD and improve outcomes in LTx from DCD.
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Affiliation(s)
- Shinichi Kawana
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Mikio Okazaki
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
| | - Tomohisa Sakaue
- Department of Cardiovascular and Thoracic Surgery, Ehime University Graduate School of Medicine, Shitsukawa, Toon 7910295, Ehime, Japan; Department of Cell Growth and Tumor Regulation, Proteo-Science Center (PROS), Ehime University, Shitsukawa, Toon 7910204, Ehime, Japan
| | - Kohei Hashimoto
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Kentaro Nakata
- Department of Surgery, Division of Cardiovascular and Thoracic Surgery, Duke University School of Medicine, Durham, NC 27710, USA
| | - Haruki Choshi
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Shin Tanaka
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Kentaroh Miyoshi
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Shinji Ohtani
- Department of Cell Growth and Tumor Regulation, Proteo-Science Center (PROS), Ehime University, Shitsukawa, Toon 7910204, Ehime, Japan
| | - Toshiaki Ohara
- Department of Pathology and Experimental Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Seiichiro Sugimoto
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Akihiro Matsukawa
- Department of Pathology and Experimental Medicine, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
| | - Shinichi Toyooka
- Department of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
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Guo ZF, Tongmuang N, Li C, Zhang C, Hu L, Capreri D, Zuo MX, Summer R, Sun J. Inhibiting endothelial cell Mst1 attenuates acute lung injury in mice. JCI Insight 2024; 9:e178208. [PMID: 39253972 PMCID: PMC11385092 DOI: 10.1172/jci.insight.178208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 07/25/2024] [Indexed: 09/11/2024] Open
Abstract
Lung endothelium plays a pivotal role in the orchestration of inflammatory responses to acute pulmonary insults. Mammalian sterile 20-like kinase 1 (Mst1) is a serine/threonine kinase that has been shown to play an important role in the regulation of apoptosis, stress responses, and organ growth. This study investigated the role of Mst1 in lung endothelial activation and acute lung injury (ALI). We found that Mst1 was significantly activated in inflamed lung endothelial cells (ECs) and mouse lung tissues. Overexpression of Mst1 promoted nuclear factor κ-B (NF-κB) activation through promoting JNK and p38 activation in lung ECs. Inhibition of Mst1 by either its dominant negative form (DN-Mst1) or its pharmacological inhibitor markedly attenuated cytokine-induced expression of cytokines, chemokines, and adhesion molecules in lung ECs. Importantly, in a mouse model of lipopolysaccharide-induced (LPS-induced) ALI, both deletion of Mst1 in lung endothelium and treatment of WT mice with a pharmacological Mst1 inhibitor significantly protected mice from LPS-induced ALI. Together, our findings identified Mst1 kinase as a key regulator in controlling lung EC activation and suggest that therapeutic strategies aimed at inhibiting Mst1 activation might be effective in the prevention and treatment of inflammatory lung diseases.
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Affiliation(s)
- Zhi-Fu Guo
- Center for Translational Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
- Department of Cardiology, Changhai Hospital, Naval Medical University, Shanghai
| | - Nopprarat Tongmuang
- Center for Translational Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Chao Li
- Center for Translational Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Chen Zhang
- Center for Translational Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Louis Hu
- Center for Translational Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Daniel Capreri
- Center for Translational Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Mei-Xing Zuo
- Center for Translational Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Ross Summer
- Center for Translational Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
| | - Jianxin Sun
- Center for Translational Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
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Hao Y, Fu H, Li K, Zou X, Zhou X, Tang X, Liu C, Zhou F. Inhibition of GBP1 alleviates pyroptosis of human pulmonary microvascular endothelial cells through STAT1/NLRP3/GSDMD pathway. Mol Immunol 2024; 173:1-9. [PMID: 38996607 DOI: 10.1016/j.molimm.2024.07.005] [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: 11/01/2023] [Revised: 02/16/2024] [Accepted: 07/08/2024] [Indexed: 07/14/2024]
Abstract
Restoring and maintaining the function of endothelial cells is critical for acute respiratory distress syndrome (ARDS). Guanylate binding protein 1(GBP1) is proved to elevated in ARDS patients, but its role and mechanism remains unclear. The objective of this study is to investigate the internal mechanism of GBP1 in lung injury. Our study showed that when the LPS and IFN-γ induced human Pulmonary Microvascular Endothelial Cells (HPMECs) injury model was established, cell viability was significantly reduced, and the levels of GBP1 levels and inflammatory factors were significantly increased. When transfection with si-GBP1, low expression of GBP1 promoted cell proliferation and migration, and decreased the expression of downstream inflammatory factors. Furthermore, the inhibition of GBP1 significantly reduced the occurrence of cell pyroptosis and the expression of NLRP3 and STAT1. Our study indicated that GBP1 alleviates endothelial pyroptosis and inflammation through STAT1 / NLRP3/GSDMD signaling pathway, and GBP1 may be a new target in the treatment of lung injury in the future.
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Affiliation(s)
- Yingting Hao
- Department of Critical Care Medicine, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China.
| | - Hongxue Fu
- Department of Critical Care Medicine, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China.
| | - Kaili Li
- Department of Critical Care Medicine, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China.
| | - Xuan Zou
- Department of Critical Care Medicine, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China.
| | - Xin Zhou
- Department of Critical Care Medicine, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China.
| | - Xiyue Tang
- Department of Critical Care Medicine, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China.
| | - Chang Liu
- Department of Critical Care Medicine, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China.
| | - Fachun Zhou
- Department of Critical Care Medicine, the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China.
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5
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Geng F, Chen J, Song B, Tang Z, Li X, Zhang S, Yang T, Liu Y, Mo W, Zhang Y, Sun C, Tan L, Tu W, Yu D, Cao J, Zhang S. Chaperone- and PTM-mediated activation of IRF1 tames radiation-induced cell death and the inflammatory response. Cell Mol Immunol 2024; 21:856-872. [PMID: 38849539 PMCID: PMC11291999 DOI: 10.1038/s41423-024-01185-3] [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: 11/07/2023] [Accepted: 05/13/2024] [Indexed: 06/09/2024] Open
Abstract
The key role of structural cells in immune modulation has been revealed with the advent of single-cell multiomics, but the underlying mechanism remains poorly understood. Here, we revealed that the transcriptional activation of interferon regulatory factor 1 (IRF1) in response to ionizing radiation, cytotoxic chemicals and SARS-CoV-2 viral infection determines the fate of structural cells and regulates communication between structural and immune cells. Radiation-induced leakage of mtDNA initiates the nuclear translocation of IRF1, enabling it to regulate the transcription of inflammation- and cell death-related genes. Novel posttranslational modification (PTM) sites in the nuclear localization sequence (NLS) of IRF1 were identified. Functional analysis revealed that mutation of the acetylation site and the phosphorylation sites in the NLS blocked the transcriptional activation of IRF1 and reduced cell death in response to ionizing radiation. Mechanistically, reciprocal regulation between the single-stranded DNA sensors SSBP1 and IRF1, which restrains radiation-induced and STING/p300-mediated PTMs of IRF1, was revealed. In addition, genetic deletion or pharmacological inhibition of IRF1 tempered radiation-induced inflammatory cell death, and radiation mitigators also suppressed SARS-CoV-2 NSP-10-mediated activation of IRF1. Thus, we revealed a novel cytoplasm-oriented mechanism of IRF1 activation in structural cells that promotes inflammation and highlighted the potential effectiveness of IRF1 inhibitors against immune disorders.
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Affiliation(s)
- Fenghao Geng
- Laboratory of Radiation Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, 610041, China
- Department of Radiation Medicine, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, China
| | - Jianhui Chen
- Department of Radiation Medicine, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, China
| | - Bin Song
- Laboratory of Radiation Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, 610041, China
| | - Zhicheng Tang
- School of Radiation Medicine and Protection, State Key Laboratory of Radiation Medicine, Soochow University, Suzhou, 215123, China
| | - Xiaoqian Li
- Department of Radiation Medicine, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, China
| | - Shuaijun Zhang
- Laboratory of Radiation Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, 610041, China
| | - Tingyi Yang
- Department of Radiation Medicine, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, China
| | - Yulan Liu
- The Second Affiliated Hospital of Chengdu Medical College, China National Nuclear Corporation 416 Hospital, Chengdu, 610051, China
| | - Wei Mo
- School of Radiation Medicine and Protection, State Key Laboratory of Radiation Medicine, Soochow University, Suzhou, 215123, China
| | - Yining Zhang
- Department of Radiation Medicine, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, China
| | - Chuntang Sun
- Laboratory of Radiation Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, 610041, China
| | - Lei Tan
- Laboratory of Radiation Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, 610041, China
| | - Wenling Tu
- The Second Affiliated Hospital of Chengdu Medical College, China National Nuclear Corporation 416 Hospital, Chengdu, 610051, China
| | - Daojiang Yu
- The Second Affiliated Hospital of Chengdu Medical College, China National Nuclear Corporation 416 Hospital, Chengdu, 610051, China
| | - Jianping Cao
- School of Radiation Medicine and Protection, State Key Laboratory of Radiation Medicine, Soochow University, Suzhou, 215123, China
| | - Shuyu Zhang
- Laboratory of Radiation Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, 610041, China.
- Department of Radiation Medicine, West China School of Basic Medical Sciences & Forensic Medicine, Sichuan University, Chengdu, 610041, China.
- The Second Affiliated Hospital of Chengdu Medical College, China National Nuclear Corporation 416 Hospital, Chengdu, 610051, China.
- NHC Key Laboratory of Nuclear Technology Medical Transformation, Mianyang Central Hospital, Mianyang, 621099, China.
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6
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Sun M, Liu Y, Wang X, Wang L. HPGD: An Intermediate Player in Microglial Polarization and Multiple Sclerosis Regulated by Nr4a1. Mol Neurobiol 2024:10.1007/s12035-024-04280-8. [PMID: 38842672 DOI: 10.1007/s12035-024-04280-8] [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: 12/15/2023] [Accepted: 06/02/2024] [Indexed: 06/07/2024]
Abstract
HPGD encodes 15-Hydroxyprostaglandin dehydrogenase catalyzing the decomposition of prostaglandin E2 and has not been reported in multiple sclerosis (MS). We previously found that Nr4a1 regulated microglia polarization and inhibited the progression of experimental autoimmune encephalomyelitis (EAE). Bioinformatics analysis suggested that HPGD might be regulated by Nr4a1. Therefore, this study aimed to explore the role of HPGD in microglia polarization and determine whether HPGD mediates the inhibition of EAE by Nr4a1. C57BL/6 mice were treated with MOG35-55 peptide to induce EAE. BV-2 cells were treated with LPS/IL-4 to induce M1/M2 polarization. We then analyzed the pathological changes of spinal cord tissue, detected the expression levels of M1/M2 genes in tissues and cells, and explored the effect of HPGD on PPARγ activation to clarify the role of HPGD in EAE. The interaction between HPGD and Nr4a1 was verified by ChIP and pull-down assay. HPGD was downregulated in the spinal cord of EAE mice and HPGD overexpression alleviated the progression of EAE. Experiments in vitro and in vivo revealed that HPGD inhibited M1 polarization, promoted M2 polarization and increased PPARγ-DNA complex level. Nr4a1 could bind to the promoter of HPGD and its overexpression increased HPGD level. HPGD overexpression (or knockdown) reversed the effect of Nr4a1 knockdown (or overexpression) on M1/2 polarization. HPGD is regulated by Nr4a1 and inhibits the progression of EAE through shifting the M1/M2 polarization and promoting the activation of PPARγ signaling pathway. This study provides potential targets and basis for the development of MS therapeutic drugs.
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Affiliation(s)
- Mengyang Sun
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Yang Liu
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Xiaowan Wang
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Limei Wang
- Department of Neurology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China.
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Xian Y, Wang X, Yu Y, Chen X. Transcriptomics confirms IRF1 as a key regulator of pyroptosis in diabetic retinopathy. Biochem Biophys Res Commun 2024; 709:149760. [PMID: 38554602 DOI: 10.1016/j.bbrc.2024.149760] [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: 01/23/2024] [Revised: 03/01/2024] [Accepted: 03/04/2024] [Indexed: 04/02/2024]
Abstract
BACKGROUND Diabetic retinopathy (DR) is a retinal microvascular complication caused by hyperglycemia, which can lead to visual impairment or blindness. Pyroptosis is a type of inflammation-related programmed cell death, activated by caspase-1, resulting in the maturation of IL-1β and IL-18 and the rupture of the cell membrane. RNA sequencing (RNA-seq) is a high-throughput sequencing technique that reveals the presence and quantity of RNA in the genome at a specific time point, i.e., the transcriptome. RNA-seq can analyze gene expression levels, splicing variants, mutations, fusions, editing and other post-transcriptional modifications, as well as gene expression differences between different samples or conditions. It has been widely used in biological and medical research, clinical diagnosis and new drug development. This study aimed to establish an in vitro model of diabetic retinopathy by culturing human retinal endothelial cells (HREC) with high glucose (30 mmol/L), and to detect their transcriptome expression by RNA-seq, screen for key genes related to pyroptosis, and validate the sequencing results by subsequent experiments. METHODS We used RNA-seq to detect the transcriptome expression differences between HREC cells cultured with high glucose and control group, and identified differentially expressed genes by GO/KEGG analysis. We constructed a PPI network and determined the key genes by Cytoscape software and CytoHubba plugin. We validated the expression of related factors by Western Blot, qPCR and ELISA. RESULTS We performed GO and KEGG analysis on the RNA-seq data and found differentially expressed genes. We used Cytoscape and CytoHubba plugin to screen out IRF1 as the key gene, and then detected the expression of IRF1 in HREC under high glucose and control group by Western Blot and qPCR. We found that the expression of Caspase-1, GSDMD and IL-1β proteins in HREC under high glucose increased, while the expression of these proteins decreased after the inhibition of IRF1 by siRNA. ELISA showed that the secretion of IL-1β in HREC under high glucose increased, while the inhibition of IRF1 reduced the secretion of IL-1β. These results indicate that IRF1 plays an important role in DR, and provides a new target and strategy for the prevention and treatment of this disease.
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Affiliation(s)
- Yang Xian
- Department of Ophthalmology, Shengjing Hospital of China Medical University, China
| | - Xingli Wang
- Department of Ophthalmology, Shengjing Hospital of China Medical University, China
| | - Yong Yu
- Department of Ophthalmology, Shengjing Hospital of China Medical University, China
| | - XiaoLong Chen
- Department of Ophthalmology, Shengjing Hospital of China Medical University, China.
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8
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Lu L, Jang S, Zhu J, Qin Q, Sun L, Sun J. Nur77 mitigates endothelial dysfunction through activation of both nitric oxide production and anti-oxidant pathways. Redox Biol 2024; 70:103056. [PMID: 38290383 PMCID: PMC10844745 DOI: 10.1016/j.redox.2024.103056] [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: 10/17/2023] [Revised: 01/05/2024] [Accepted: 01/22/2024] [Indexed: 02/01/2024] Open
Abstract
BACKGROUND Nur77 belongs to the member of orphan nuclear receptor 4A family that plays critical roles in maintaining vascular homeostasis. This study aims to determine whether Nur77 plays a role in attenuating vascular dysfunction, and if so, to determine the molecular mechanisms involved. METHODS Both Nur77 knockout (Nur77 KO) and Nur77 endothelial specific transgenic mice (Nur77-Tg) were employed to examine the functional significance of Nur77 in vascular endothelium in vivo. Endothelium-dependent vasodilatation to acetylcholine (Ach) and reactive oxygen species (ROS) production was determined under inflammatory and high glucose conditions. Expression of genes was determined by real-time PCR and western blot analysis. RESULTS In response to tumor necrosis factor alpha (TNF-α) treatment and diabetes, the endothelium-dependent vasodilatation to Ach was significantly impaired in aorta from Nur77 KO as compared with those from the wild-type (WT) mice. Endothelial specific overexpression of Nur77 markedly prevented both TNF-α- and high glucose-induced endothelial dysfunction. Compared with WT mice, after TNF-α and high glucose treatment, ROS production in aorta was significantly increased in Nur77 KO mice, but it was inhibited in Nur77-Tg mice, as determined by dihydroethidium (DHE) staining. Furthermore, we demonstrated that Nur77 overexpression substantially increased the expression of several key enzymes involved in nitric oxide (NO) production and ROS scavenging, including endothelial nitric oxide synthase (eNOS), guanosine triphosphate cyclohydrolase 1 (GCH-1), glutathione peroxidase-1 (GPx-1), and superoxide dismutases (SODs). Mechanistically, we found that Nur77 increased GCH1 mRNA stability by inhibiting the expression of microRNA-133a, while Nur77 upregulated SOD1 expression through directly binding to the human SOD1 promoter in vascular endothelial cells. CONCLUSION Our results suggest that Nur77 plays an essential role in attenuating endothelial dysfunction through activating NO production and anti-oxidant pathways in vascular endothelium. Targeted activation of Nur77 may provide a novel therapeutic approach for the treatment of cardiovascular diseases associated with endothelial dysfunction.
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Affiliation(s)
- Lin Lu
- Department of Cardiovascular Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, PR China
| | - Soohwa Jang
- Center for Translational Medicine, Thomas Jefferson University, Philadelphia, PA, 19107, USA
| | - Jiaqi Zhu
- Center for Translational Medicine, Thomas Jefferson University, Philadelphia, PA, 19107, USA
| | - Qing Qin
- Center for Translational Medicine, Thomas Jefferson University, Philadelphia, PA, 19107, USA
| | - Lijun Sun
- Center for Translational Medicine, Thomas Jefferson University, Philadelphia, PA, 19107, USA
| | - Jianxin Sun
- Center for Translational Medicine, Thomas Jefferson University, Philadelphia, PA, 19107, USA.
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Li H, Chen X, Xu J, Zhu L, Li C, Sun X, Li X, Guo J, Li J, Wang S, He Y, Wang H, Huang C, Meng XM, Li J. GRP/GRPR enhances alcohol-associated liver injury through the IRF1-mediated Caspase-1 inflammasome and NOX2-dependent ROS pathway. Hepatology 2024; 79:392-408. [PMID: 37409771 DOI: 10.1097/hep.0000000000000531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 06/30/2023] [Indexed: 07/07/2023]
Abstract
BACKGROUND AND AIMS The common characteristics of alcohol-associated liver injury (ALI) include abnormal liver function, infiltration of inflammatory cells, and generation of oxidative stress. The gastrin-releasing peptide receptor (GRPR) is activated by its neuropeptide ligand, gastrin-releasing peptide (GRP). GRP/GRPR appears to induce the production of cytokines in immune cells and promotes neutrophil migration. However, the effects of GRP/GRPR in ALI are unknown. APPROACH AND RESULTS We found high GRPR expression in the liver of patients with alcohol-associated steatohepatitis and increased pro-GRP levels in peripheral blood mononuclear cells of these patients compared with that of the control. Increased expression of GRP may be associated with histone H3 lysine 27 acetylation induced by alcohol, which promotes the expression of GRP and then GRPR binding. Grpr-/- and Grprflox/floxLysMCre mice alleviated ethanol-induced liver injury with relieved steatosis, lower serum alanine aminotransferase, aspartate aminotransferase, triglycerides, malondialdehyde, and superoxide dismutase levels, reduced neutrophil influx, and decreased expression and release of inflammatory cytokines and chemokines. Conversely, the overexpression of GRPR showed opposite effects. The pro-inflammatory and oxidative stress roles of GRPR might be dependent on IRF1-mediated Caspase-1 inflammasome and NOX2-dependent reactive oxygen species pathway, respectively. In addition, we verified the therapeutic and preventive effects of RH-1402, a novel GRPR antagonist, for ALI. CONCLUSIONS A knockout or antagonist of GRPR during excess alcohol intake could have anti-inflammatory and antioxidative roles, as well as provide a platform for histone modification-based therapy for ALI.
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Affiliation(s)
- Haidi Li
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Xin Chen
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Jiejie Xu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Lin Zhu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Chao Li
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Xiaolong Sun
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Xiaofeng Li
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Jianbo Guo
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, China
| | - Juanjuan Li
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Sheng Wang
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
- Center for Scientific Research, Anhui Medical University, Hefei, China
| | - Yong He
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Hua Wang
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Cheng Huang
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Xiao-Ming Meng
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
| | - Jun Li
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China
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10
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Guo ZF, Tongmuang N, Li C, Zhang C, Hu L, Capreri D, Zuo MX, Summer R, Sun J. Inhibiting endothelial cell Mst1 attenuates acute lung injury in mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.27.559864. [PMID: 37808846 PMCID: PMC10557750 DOI: 10.1101/2023.09.27.559864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Background Lung endothelium plays a pivotal role in the orchestration of inflammatory and injury responses to acute pulmonary insults. Mammalian sterile 20-like kinase 1 (Mst1), a mammalian homolog of Hippo, is a serine/threonine kinase that is ubiquitously expressed in many tissues and has been shown to play an important role in the regulation of apoptosis, inflammation, stress responses, and organ growth. While Mst1 exhibits high expression in the lung, its involvement in the endothelial response to pulmonary insults remains largely unexplored. Methods Mst1 activity was assessed in lung endothelium by western blot. Mst1 endothelial specific knockout mice and a pharmacological inhibitor were employed to assess the effects of Mst1 on homeostatic and lipopolysaccharide (LPS)-induced endothelial responses. Readouts for these studies included various assays, including NF-κB activation and levels of various inflammatory cytokines and adhesion molecules. The role of Mst1 in lung injury was evaluated in a LPS-induced murine model of acute lung injury (ALI). Results Mst1 phosphorylation was significantly increased in lung endothelial cells after exposure to tumor necrosis factor (TNF)-alpha (TNF-α) and mouse lung tissues after LPS exposure. Overexpression of full length Mst1 or its kinase domain promoted nuclear factor kappaB (NF-κB) activation through promoting JNK and p38 activation, whereas dominant negative forms of Mst1 (DN-Mst1) attenuated endothelial responses to TNF-α and interleukin-1β. Consistent with this, targeted deletion of Mst1 in lung endothelium reduced lung injury to LPS in mice. Similarly, wild-type mice were protected from LPS-induced lung injury following treatment with a pharmacological inhibitor of Mst1/2. Conclusions Our findings identified Mst1 kinase as a key regulator in the control of lung EC activation and suggest that therapeutic strategies aimed at inhibiting Mst1 activation might be effective in the prevention and treatment of lung injury to inflammatory insults.
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Zhang Q, Huang Y, Gong C, Tang Y, Xiong J, Wang D, Liu X. Dexmedetomidine attenuates inflammation and organ injury partially by upregulating Nur77 in sepsis. Immun Inflamm Dis 2023; 11:e883. [PMID: 37382273 PMCID: PMC10283499 DOI: 10.1002/iid3.883] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 05/03/2023] [Accepted: 05/10/2023] [Indexed: 06/30/2023] Open
Abstract
PURPOSE The aim of this study was to investigate the effect of dexmedetomidine (Dex) on inflammation and organ injury in sepsis, as well as the potential relationship between Dex and nuclear receptor 77 (Nur77). METHODS We investigated the effects of dexmedetomidine on lipopolysaccharide (LPS)-induced inflammation in RAW264.7 cells and organ injury in the cecal ligation and puncture (CLP) mouse model. Additionally, we examined the relationship between dexmedetomidine and Nur77. The expression levels of Nur77 in RAW264.7 cells were analyzed under various types of stimulation using quantitative reverse transcription polymerase chain reaction and western blot analysis. Inflammatory cytokine levels in the cells were evaluated using enzyme-linked immunoassay. Organ injuries were assessed by examining tissue histology and pathology of the lung, liver, and kidney. RESULTS Dexmedetomidine increased the expression of Nur77 and IL-10, and downregulated inflammatory cytokines (IL-1β and TNF-α) in LPS-treated RAW264.7 cells. The effect of dexmedetomidine on inhibiting inflammation in LPS-treated RAW264.7 cells was promoted by overexpressing Nur77, while it was reversed by downregulating Nur77. Additionally, dexmedetomidine promoted the expression of Nur77 in the lung and CLP-induced pathological changes in the lung, liver, and kidney. Activation of Nur77 with the agonist Cytosporone B (CsnB) significantly suppressed the production of IL-1β and TNF-α in LPS-treated RAW264.7 cells. In contrast, knockdown of Nur77 augmented IL-1β and TNF-α production in LPS-treated RAW264.7 cells. CONCLUSION Dexmedetomidine can attenuate inflammation and organ injury, at least partially, via upregulating Nur77 in sepsis.
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Affiliation(s)
- Qian Zhang
- Department of Critical Care MedicineGuizhou Medical UniversityGuiyangGuizhouPeople's Republic of China
| | - Yun Huang
- Department of NephrologyFirst People's HospitalGuiyangGuizhouPeople's Republic of China
| | - Chenchen Gong
- Department of Thoracic and Cardiovascular SurgeryThe Children's Hospital of Zhejiang University School of MedicineZhejiangPeople's Republic of China
| | - Yan Tang
- Department of Critical Care MedicineAffiliated Hospital of Guizhou Medical UniversityGuiyangGuizhouPeople's Republic of China
| | - Jie Xiong
- Department of HematologyThe Affiliated Hospital of Guizhou Medical UniversityGuiyangGuizhouPeople's Republic of China
| | - Difen Wang
- Department of Critical Care MedicineAffiliated Hospital of Guizhou Medical UniversityGuiyangGuizhouPeople's Republic of China
| | - Xu Liu
- Department of Critical Care MedicineAffiliated Hospital of Guizhou Medical UniversityGuiyangGuizhouPeople's Republic of China
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12
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Zhong YX, Zhou CC, Zheng YF, Dai HK, Chen RY, Wang YR, Zhan CY, Luo JL, Xie AN. Endoplasmic Reticulum Stress-induced Endothelial Dysfunction Promotes Neointima Formation after Arteriovenous Grafts in Mice on High-fat Diet. Curr Med Sci 2023; 43:115-122. [PMID: 36640244 DOI: 10.1007/s11596-022-2663-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 09/03/2022] [Indexed: 01/15/2023]
Abstract
OBJECTIVE Endothelial dysfunction is one candidate for triggering neointima formation after arteriovenous grafts (AVGs), but the factors mediating this process are unclear. The purpose of this study was to investigate the role of endoplasmic reticulum stress (ERS)-induced endothelial dysfunction in neointima formation following AVGs in high-fat diet (HFD) mice. METHODS CCAAT-enhancer-binding protein-homologous protein (CHOP) knockout (KO) mice were created. Mice were fed with HFD to produce HFD model. AVGs model were applied in the groups of WT ND, WT HFD, and CHOP KO HFD. Human umbilical vein endothelial cells (HUVECs) were cultured with oxidized low density lipoprotein (ox-LDL) (40 mg/L) for the indicated time lengths (0, 6, 12, 24 h). ERS inhibitor tauroursodeoxycholic acid (TUDCA) was used to block ERS. Immunohistochemical staining was used to observe the changes of ICAM1. Changes of ERS were detected by real-time RT-PCR. Protein expression levels and ERS activation were detected by Western blotting. Endothellial cell function was determined by endothelial permeability assay and transendothelial migration assay. RESULTS HFD increased neointima formation in AVGs associated with endothelial dysfunction. At the same time, ERS was increased in endothelial cells (ECs) after AVGs in mice consuming the HFD. In vitro, ox-LDL was found to stimulate ERS, increase the permeability of the EC monolayer, and cause endothelial dysfunction. Blocking ERS with TUDCA or CHOP siRNA reversed the EC dysfunction caused by ox-LDL. In vivo, knockout of CHOP (CHOP KO) protected the function of ECs and decreased neointima formation after AVGs in HFD mice. CONCLUSION Inhibiting ERS in ECs could improve the function of AVGs.
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Affiliation(s)
- Yan-Xia Zhong
- Emergency and Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Chen-Chen Zhou
- Emergency and Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Ying-Fang Zheng
- Emergency and Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Hong-Kai Dai
- Emergency and Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Ren-Yu Chen
- Emergency and Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yu-Rou Wang
- Emergency and Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Cheng-Ye Zhan
- Emergency and Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Jin-Long Luo
- Emergency and Intensive Care Unit, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Ai-Ni Xie
- Divison of Cardiothoracic and Vascular Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
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13
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The Nurr7 agonist Cytosporone B differentially regulates inflammatory responses in human polarized macrophages. Immunobiology 2022; 227:152299. [DOI: 10.1016/j.imbio.2022.152299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 09/21/2022] [Accepted: 10/26/2022] [Indexed: 11/11/2022]
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14
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Li ZF, Wang YC, Feng QR, Zhang YS, Zhuang YF, Xie ZX, Bai XJ. Inhibition of the C3a receptor attenuates sepsis-induced acute lung injury by suppressing pyroptosis of the pulmonary vascular endothelial cells. Free Radic Biol Med 2022; 184:208-217. [PMID: 35367342 DOI: 10.1016/j.freeradbiomed.2022.02.032] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 02/14/2022] [Accepted: 02/24/2022] [Indexed: 12/14/2022]
Abstract
Acute lung injury (ALI) is the leading cause of bacterial sepsis-related death because of disrupted pulmonary endothelial barrier, resulting in protein-rich pulmonary oedema, an influx of pro-inflammatory cells and refractory hypoxaemia. Several studies have reported that C3a levels are significantly higher in organs with sepsis and their peripheral organs and are closely associated with organ dysfunction and poor prognosis in sepsis. However, the role of the C3a complement in sepsis ALI remains unclear. Therefore, this study aimed to investigate the important role and mechanism of C3a in preventing the occurrence of pyroptosis (a pro-inflammatory form of cell death) to protect the lung endothelial cells (ECs) in sepsis-induced ALI. A septic mouse model was established with cecal ligation and puncture (CLP), which demonstrated that C3a mediated EC pyroptosis through its C3aR receptor. Furthermore, inhibition of the C3a-C3aR axis could block both NLRP3/caspase-1 and caspase-11 pathways, thus preventing pulmonary EC from pyroptosis. These results indicate that inhibition of the C3A-C3AR complement axis can inhibit pulmonary vascular EC pyroptosis, a potential target for the treatment of ALI.
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Affiliation(s)
- Zhan-Fei Li
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, 1095 Jiefang avenue, Wuhan, 430030, Hubei Province, People's Republic of China.
| | - Yu-Chang Wang
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, 1095 Jiefang avenue, Wuhan, 430030, Hubei Province, People's Republic of China.
| | - Quan-Rui Feng
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, People's Republic of China
| | - Yong-Sheng Zhang
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, People's Republic of China
| | - Yang-Fan Zhuang
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, People's Republic of China
| | - Zhen-Xing Xie
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, People's Republic of China
| | - Xiang-Jun Bai
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, People's Republic of China
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Honda A, Hoeksema MA, Sakai M, Lund SJ, Lakhdari O, Butcher LD, Rambaldo TC, Sekiya NM, Nasamran CA, Fisch KM, Sajti E, Glass CK, Prince LS. The Lung Microenvironment Instructs Gene Transcription in Neonatal and Adult Alveolar Macrophages. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 208:1947-1959. [PMID: 35354612 PMCID: PMC9012679 DOI: 10.4049/jimmunol.2101192] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 02/10/2022] [Indexed: 12/13/2022]
Abstract
Immaturity of alveolar macrophages (AMs) around birth contributes to the susceptibility of newborns to lung disease. However, the molecular features differentiating neonatal and mature, adult AMs are poorly understood. In this study, we identify the unique transcriptomes and enhancer landscapes of neonatal and adult AMs in mice. Although the core AM signature was similar, murine adult AMs expressed higher levels of genes involved in lipid metabolism, whereas neonatal AMs expressed a largely proinflammatory gene profile. Open enhancer regions identified by an assay for transposase-accessible chromatin followed by high-throughput sequencing (ATAC-seq) contained motifs for nuclear receptors, MITF, and STAT in adult AMs and AP-1 and NF-κB in neonatal AMs. Intranasal LPS activated a similar innate immune response in both neonatal and adult mice, with higher basal expression of inflammatory genes in neonates. The lung microenvironment drove many of the distinguishing gene expression and open chromatin characteristics of neonatal and adult AMs. Neonatal mouse AMs retained high expression of some proinflammatory genes, suggesting that the differences in neonatal AMs result from both inherent cell properties and environmental influences.
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Affiliation(s)
- Asami Honda
- Department of Pediatrics, University of California, San Diego, La Jolla, CA
- Rady Children's Hospital, San Diego, CA
| | - Marten A Hoeksema
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA
| | - Mashito Sakai
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA
| | - Sean J Lund
- Department of Pediatrics, University of California, San Diego, La Jolla, CA
- Rady Children's Hospital, San Diego, CA
| | - Omar Lakhdari
- Department of Pediatrics, University of California, San Diego, La Jolla, CA
- Rady Children's Hospital, San Diego, CA
| | - Lindsay D Butcher
- Department of Pediatrics, Stanford University School of Medicine, Palo Alto, CA
| | | | | | - Chanond A Nasamran
- Center for Computational Biology and Bioinformatics, University of California, San Diego, La Jolla, CA
| | - Kathleen M Fisch
- Center for Computational Biology and Bioinformatics, University of California, San Diego, La Jolla, CA
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of California, San Diego, La Jolla, CA; and
| | - Eniko Sajti
- Department of Pediatrics, University of California, San Diego, La Jolla, CA
- Rady Children's Hospital, San Diego, CA
| | - Christopher K Glass
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA
- Department of Medicine, University of California, San Diego, La Jolla, CA
| | - Lawrence S Prince
- Department of Pediatrics, Stanford University School of Medicine, Palo Alto, CA;
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16
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Sommer N, Pak O, Hecker M. New Avenues for Anti-inflammatory Signaling of Nur77 in Acute Lung Injury. Am J Respir Cell Mol Biol 2021; 65:236-237. [PMID: 34086527 PMCID: PMC8485992 DOI: 10.1165/rcmb.2021-0210ed] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Affiliation(s)
- Natascha Sommer
- Justus Liebig University, Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL)., Giessen, Germany
| | - Oleg Pak
- Justus Liebig Universitat Giessen, 9175, Excellence Cluster Cardiopulmonary System University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL)., Giessen, Germany
| | - Matthias Hecker
- Justus Liebig University, Excellence Cluster Cardiopulmonary System, University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL)., Giessen, Germany;
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