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Yu J, Fu Y, Gao J, Zhang Q, Zhang N, Zhang Z, Jiang X, Chen C, Wen Z. Cathepsin C from extracellular histone-induced M1 alveolar macrophages promotes NETosis during lung ischemia-reperfusion injury. Redox Biol 2024; 74:103231. [PMID: 38861835 DOI: 10.1016/j.redox.2024.103231] [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: 04/10/2024] [Revised: 06/04/2024] [Accepted: 06/05/2024] [Indexed: 06/13/2024] Open
Abstract
Primary graft dysfunction (PGD) is a severe form of acute lung injury resulting from lung ischemia/reperfusion injury (I/R) in lung transplantation (LTx), associated with elevated post-transplant morbidity and mortality rates. Neutrophils infiltrating during reperfusion are identified as pivotal contributors to lung I/R injury by releasing excessive neutrophil extracellular traps (NETs) via NETosis. While alveolar macrophages (AMs) are involved in regulating neutrophil chemotaxis and infiltration, their role in NETosis during lung I/R remains inadequately elucidated. Extracellular histones constitute the main structure of NETs and can activate AMs. In this study, we confirmed the significant involvement of extracellular histone-induced M1 phenotype of AMs (M1-AMs) in driving NETosis during lung I/R. Using secretome analysis, public protein databases, and transwell co-culture models of AMs and neutrophils, we identified Cathepsin C (CTSC) derived from AMs as a major mediator in NETosis. Further elucidating the molecular mechanisms, we found that CTSC induced NETosis through a pathway dependent on NADPH oxidase-mediated production of reactive oxygen species (ROS). CTSC could significantly activate p38 MAPK, resulting in the phosphorylation of the NADPH oxidase subunit p47phox, thereby facilitating the trafficking of cytoplasmic subunits to the cell membrane and activating NADPH oxidase. Moreover, CTSC up-regulated and activated its substrate membrane proteinase 3 (mPR3), resulting in an increased release of NETosis-related inflammatory factors. Inhibiting CTSC revealed great potential in mitigating NETosis-related injury during lung I/R. These findings suggests that CTSC from AMs may be a crucial factor in mediating NETosis during lung I/R, and targeting CTSC inhition may represent a novel intervention for PGD in LTx.
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Affiliation(s)
- Jing Yu
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China; Department of Anesthesiology, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Third Hospital of Shanxi Medical University, Tongji Shanxi Hospital, Taiyuan, China
| | - Yu Fu
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Jiameng Gao
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Qingqing Zhang
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Nan Zhang
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Zhiyuan Zhang
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Xuemei Jiang
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Chang Chen
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China.
| | - Zongmei Wen
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, China.
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van Zyl M, Cramer E, Sanders JSF, Leuvenink HGD, Lisman T, van Rooy MJ, Hillebrands JL. The role of neutrophil extracellular trap formation in kidney transplantation: Implications from donors to the recipient. Am J Transplant 2024:S1600-6135(24)00291-0. [PMID: 38719094 DOI: 10.1016/j.ajt.2024.04.018] [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: 01/19/2024] [Revised: 03/19/2024] [Accepted: 04/05/2024] [Indexed: 05/23/2024]
Abstract
Kidney transplantation remains the gold standard for patients with end-stage renal disease, but severe donor organ shortage has led to long waiting lists. The utilization of expanded criteria donor kidneys within the category of deceased donors has enlarged the pool of available kidneys for transplantation; however, these grafts often have an increased risk for delayed graft function or reduced graft survival following transplantation. During brain or circulatory death, neutrophils are recruited to the vascular beds of kidneys where a proinflammatory microenvironment might prime the formation of neutrophil extracellular traps (NETs), web-like structures, containing proteolytic enzymes, DNA, and histones. NETs are known to cause tissue damage and specifically endothelial damage while activating other systems such as coagulation and complement, contributing to tissue injury and an unfavorable prognosis in various diseases. In lung transplantation and kidney transplantation studies, NETs have also been associated with primary graft dysfunction or rejection. In this review, the role that NETs might play across the different phases of transplantation, already initiated in the donor, during preservation, and in the recipient, will be discussed. Based on current knowledge, NETs might be a promising therapeutic target to improve graft outcomes.
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Affiliation(s)
- Maryna van Zyl
- Department of Pathology and Medical Biology, University Medical Center Groningen, Groningen, the Netherlands; Department of Physiology, School of Medicine, University of Pretoria, Pretoria, South Africa
| | - Elodie Cramer
- Department of Pathology and Medical Biology, University Medical Center Groningen, Groningen, the Netherlands
| | - Jan-Stephan F Sanders
- Department of Internal Medicine, Division of Nephrology, University Medical Center Groningen, the Netherlands
| | - Henri G D Leuvenink
- Department of Surgery, University Medical Center Groningen, Groningen, the Netherlands
| | - Ton Lisman
- Department of Surgery, University Medical Center Groningen, Groningen, the Netherlands
| | - Mia-Jeanne van Rooy
- Department of Physiology, School of Medicine, University of Pretoria, Pretoria, South Africa
| | - Jan-Luuk Hillebrands
- Department of Pathology and Medical Biology, University Medical Center Groningen, Groningen, the Netherlands.
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Li X, Zhao Y, Sun W, Zhang C, Yu Y, Du B, Jin A, Liu Y. Neutrophil depletion attenuates antibody-mediated rejection in a renal transplantation mouse model. Clin Exp Immunol 2024; 216:211-219. [PMID: 38150328 PMCID: PMC11036104 DOI: 10.1093/cei/uxad128] [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: 03/26/2023] [Revised: 09/05/2023] [Accepted: 12/22/2023] [Indexed: 12/29/2023] Open
Abstract
Antibody-mediated rejection (AMR) can cause graft failure following renal transplantation. Neutrophils play a key role in AMR progression, but the exact mechanism remains unclear. We investigated the effect of neutrophils on AMR in a mouse kidney transplantation model. The mice were divided into five groups: syngeneic transplantation (Syn), allograft transplantation (Allo), and three differently treated AMR groups. The AMR mouse model was established using skin grafts to pre-sensitize recipient mice. Based on the AMR model, Ly6G-specific monoclonal antibodies were administered to deplete neutrophils (NEUT-/- + AMR) and TACI-Fc was used to block B-cell-activating factor (BAFF)/a proliferation-inducing ligand (APRIL) signaling (TACI-Fc + AMR). Pathological changes were assessed using hematoxylin-eosin and immunohistochemical staining. Banff values were evaluated using the Banff 2015 criteria. Donor-specific antibody (DSA) levels were assessed using flow cytometry, and BAFF and APRIL concentrations were measured using ELISA. Compared to the Syn and Allo groups, a significantly increased number of neutrophils and increased C4d and IgG deposition were observed in AMR mice, accompanied by elevated DSA levels. Neutrophil depletion inhibited inflammatory cell infiltration and reduced C4d and IgG deposition. Neutrophil depletion significantly decreased DSA levels after transplantation and suppressed BAFF and APRIL concentrations, suggesting a mechanism for attenuating AMR-induced graft damage. Similar results were obtained after blockading BAFF/APRIL using a TACI-Fc fusion protein. In summary, neutrophil infiltration increased in the AMR mouse renal transplantation model. Neutrophil depletion or blockading the BAFF/APRIL signaling pathway significantly alleviated AMR and may provide better options for the clinical treatment of AMR.
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Affiliation(s)
- Xingku Li
- Experimental Research Center, The Second Affiliated Hospital of Harbin Medical University, Harbin, People’s Republic of China
| | - Yakun Zhao
- Department of Urology, The Second Affiliated Hospital of Harbin Medical University, Harbin, People’s Republic of China
| | - Wenying Sun
- Clinical Laboratory, The Second Affiliated Hospital of Harbin Medical University, Harbin, People’s Republic of China
| | - Cong Zhang
- Department of Microbiology and Immunology, College of Basic Medicine, Heilongjiang University of Chinese Medicine, Harbin, People’s Republic of China
| | - Yadi Yu
- Department of Immunology, College of Basic Medicine, Harbin Medical University, Harbin, People’s Republic of China
| | - Bo Du
- Experimental Research Center, The Second Affiliated Hospital of Harbin Medical University, Harbin, People’s Republic of China
| | - AiShun Jin
- Department of Immunology, College of Basic Medicine, Harbin Medical University, Harbin, People’s Republic of China
- Department of Immunology, College of Basic Medicine, Chongqing Medical University, Chongqing, People’s Republic of China
| | - Ye Liu
- Department of Immunology, College of Basic Medicine, Harbin Medical University, Harbin, People’s Republic of China
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Dumont BL, Neagoe PE, Charles E, Villeneuve L, Ninni S, Tardif JC, Räkel A, White M, Sirois MG. Low density neutrophils and neutrophil extracellular traps (NETs) are new inflammatory players in heart failure. Can J Cardiol 2024:S0828-282X(24)00281-2. [PMID: 38555028 DOI: 10.1016/j.cjca.2024.03.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 03/11/2024] [Accepted: 03/22/2024] [Indexed: 04/02/2024] Open
Abstract
BACKGROUND Heart failure with reduced (HFrEF) or preserved ejection fraction (HFpEF) is characterized by low-grade chronic inflammation. Circulating neutrophils regroup two subtypes termed high- and low-density neutrophils (HDNs and LDNs). LDNs represent less than 2% of total neutrophil under physiological conditions, but their count increase in multiple pathologies, releasing more inflammatory cytokines and neutrophil extracellular traps (NETs). The aims of this study were to assess the differential count and role of HDNs, LDNs and NETs-related activities in HF patients. METHODS HDNs and LDNs were isolated from human blood by density gradient and purified by FACS and their counts obtained by flow cytometry. NETs formation (NETosis) was quantified by confocal microscopy. Circulating inflammatory and NETosis biomarkers were measured by ELISA. Neutrophil adhesion onto human extracellular matrix (hECM) was assessed by optical microscopy. RESULTS A total of 140 individuals were enrolled, including 33 healthy volunteers (HV), 41 HFrEF (19 stable patients and 22 presenting acute decompensated HF; ADHF) and 66 HFpEF patients (36 stable patients and 30 presenting HF decompensation). HDNs and LDNs counts were significantly increased up to 39% and 2740% respectively in HF patients compared to HV. In HF patients, the correlations between LDNs counts and circulating inflammatory (CRP, IL-6 and -8), Troponin T, NT-proBNP and NETosis components were all significant. In vitro, LDNs expressed more H3Cit and NETs and were more pro-adhesive, with ADHFpEF patients presenting the highest pro-inflammatory profile. CONCLUSIONS HFpEF patients present higher levels of circulating LDNs and NETs related activities, which are the highest in the context of acute HF decompensation.
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Affiliation(s)
- Benjamin L Dumont
- Research center, Montreal Heart Institute, Montreal, QC, Canada,; Departments of pharmacology and physiology, Faculty of medicine, Université de Montréal, Montreal, QC, Canada
| | | | - Elcha Charles
- Research center, Montreal Heart Institute, Montreal, QC, Canada,; Departments of pharmacology and physiology, Faculty of medicine, Université de Montréal, Montreal, QC, Canada
| | | | - Sandro Ninni
- Research center, Montreal Heart Institute, Montreal, QC, Canada,; CHU Lille, Institut Coeur Poumon, Université de Lille, Lille, France
| | - Jean-Claude Tardif
- Research center, Montreal Heart Institute, Montreal, QC, Canada,; Departments of medicine, Faculty of medicine, Université de Montréal, Montreal, QC, Canada
| | - Agnès Räkel
- Research Center - Centre Hospitalier de l'Université de Montréal (CHUM), Montreal, QC, Canada,; Departments of medicine, Faculty of medicine, Université de Montréal, Montreal, QC, Canada
| | - Michel White
- Research center, Montreal Heart Institute, Montreal, QC, Canada,; Departments of medicine, Faculty of medicine, Université de Montréal, Montreal, QC, Canada
| | - Martin G Sirois
- Research center, Montreal Heart Institute, Montreal, QC, Canada,; Departments of pharmacology and physiology, Faculty of medicine, Université de Montréal, Montreal, QC, Canada.
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López-Andrade B, Cunill V, Andreu V, Bento L, Segura-Guerrero M, Moñino A, Iglesias J, Julià MR, Durán MA, Ballester MC, Muncunill J, Sampol A. Plasma from patients undergoing allogeneic hematopoietic stem cell transplantation promotes NETOSIS in vitro and correlates with inflammatory parameters and clinical severity. Front Immunol 2024; 15:1353106. [PMID: 38550584 PMCID: PMC10972998 DOI: 10.3389/fimmu.2024.1353106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Accepted: 02/28/2024] [Indexed: 04/02/2024] Open
Abstract
Introduction NETosis, the mechanism by which neutrophils release extracellular traps (NETs), is closely related to inflammation. During the allogeneic hematopoietic stem cell transplantation (allo-HSCT), different stimuli can induce NETs formation. Inflammation and endothelial injury have been associated with acute graft-versus-host disease (aGVHD) and complications after allo-HSCT. We focus on the study of NETosis and its relation with cytokines, hematological and biochemical parameters and clinical outcomes before, during and after allo-HSCT. Methods We evaluate the capacity of plasma samples from allo-HSCT patients to induce NETosis, in a cell culture model. Plasma samples from patients undergoing allo-HSCT had a stronger higher NETs induction capacity (NETsIC) than plasma from healthy donors throughout the transplantation process. An optimal cut-off value by ROC analysis was established to discriminate between patients whose plasma triggered NETosis (NETs+IC group) and those who did not (NETs-IC group). Results Prior to conditioning treatment, the capacity of plasma samples to trigger NETosis was significantly correlated with the Endothelial Activation and Stress Index (EASIX) score. At day 5 after transplant, patients with a positive NETsIC had higher interleukin (IL)-6 and C-reactive protein (CRP) levels and also a higher Modified EASIX score (M-EASIX) than patients with a negative NETsIC. EASIX and M-EASIX scores seek to determine inflammation and endothelium damage, therefore it could indicate a heightened immune response and inflammation in the group of patients with a positive NETsIC. Cytokine levels, specifically IL-8 and IL-6, significantly increased after allo-HSCT with peak levels reached on day 10 after graft infusion. Only, IL-10 and IL-6 levels were significantly higher in patients with a positive NETsIC. In our small cohort, higher IL-6 and IL-8 levels were related to early severe complications (before day 15 after transplant). Discussion Although early complications were not related to NETosis by itself, NETosis could predict overall non-specific but clinically significant complications during the full patient admission. In summary, NETosis can be directly induced by plasma from allo-HSCT patients and NETsIC was associated with clinical indicators of disease severity, cytokines levels and inflammatory markers.
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Affiliation(s)
- Bernardo López-Andrade
- Department of Hematology, Hospital Universitari Son Espases, Palma, Spain
- Department of Immunology, Hospital Universitari Son Espases, Palma, Spain
- Balearic Islands Health Research Institute (IdISBa), Palma, Spain
| | - Vanesa Cunill
- Department of Immunology, Hospital Universitari Son Espases, Palma, Spain
- Balearic Islands Health Research Institute (IdISBa), Palma, Spain
| | - Valero Andreu
- Balearic Islands Health Research Institute (IdISBa), Palma, Spain
| | - Leyre Bento
- Department of Hematology, Hospital Universitari Son Espases, Palma, Spain
- Department of Immunology, Hospital Universitari Son Espases, Palma, Spain
- Balearic Islands Health Research Institute (IdISBa), Palma, Spain
| | - Marina Segura-Guerrero
- Department of Immunology, Hospital Universitari Son Espases, Palma, Spain
- Balearic Islands Health Research Institute (IdISBa), Palma, Spain
| | - Andrea Moñino
- Department of Immunology, Hospital Universitari Son Espases, Palma, Spain
- Balearic Islands Health Research Institute (IdISBa), Palma, Spain
| | - Julio Iglesias
- Department of Immunology, Hospital Universitari Son Espases, Palma, Spain
- Balearic Islands Health Research Institute (IdISBa), Palma, Spain
| | - Maria Rosa Julià
- Department of Immunology, Hospital Universitari Son Espases, Palma, Spain
- Balearic Islands Health Research Institute (IdISBa), Palma, Spain
| | - Maria Antonia Durán
- Department of Hematology, Hospital Universitari Son Espases, Palma, Spain
- Department of Immunology, Hospital Universitari Son Espases, Palma, Spain
- Balearic Islands Health Research Institute (IdISBa), Palma, Spain
| | - Maria Carmen Ballester
- Department of Hematology, Hospital Universitari Son Espases, Palma, Spain
- Department of Immunology, Hospital Universitari Son Espases, Palma, Spain
- Balearic Islands Health Research Institute (IdISBa), Palma, Spain
| | - Josep Muncunill
- Balearic Islands Health Research Institute (IdISBa), Palma, Spain
| | - Antonia Sampol
- Department of Hematology, Hospital Universitari Son Espases, Palma, Spain
- Department of Immunology, Hospital Universitari Son Espases, Palma, Spain
- Balearic Islands Health Research Institute (IdISBa), Palma, Spain
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Gao J, Zhang Z, Yu J, Zhang N, Fu Y, Jiang X, Xia Z, Zhang Q, Wen Z. Identification of Neutrophil Extracellular Trap-Related Gene Expression Signatures in Ischemia Reperfusion Injury During Lung Transplantation: A Transcriptome Analysis and Clinical Validation. J Inflamm Res 2024; 17:981-1001. [PMID: 38370470 PMCID: PMC10871139 DOI: 10.2147/jir.s444774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Accepted: 02/01/2024] [Indexed: 02/20/2024] Open
Abstract
Purpose Ischemia reperfusion injury (IRI) unavoidably occurs during lung transplantation, further contributing to primary graft dysfunction (PGD). Neutrophils are the end effectors of IRI and activated neutrophils release neutrophil extracellular traps (NETs) to further amplify damage. Nevertheless, potential contributions of NETs in IRI remain incompletely understood. This study aimed to explore NET-related gene biomarkers in IRI during lung transplantation. Methods Differential expression analysis was applied to identify differentially expressed genes (DEGs) for IRI during lung transplantation based on matrix data (GSE145989, 127003) downloaded from GEO database. The CIBERSORT and weighted gene co-expression network analysis (WGCNA) algorithms were utilized to identify key modules associated with neutrophil infiltration. Moreover, the least absolute shrinkage and selection operator regression and random forest were applied to identify potential NET-associated hub genes. Subsequently, the screened hub genes underwent further validation of an external dataset (GSE18995) and nomogram model. Based on clinical peripheral blood samples, immunofluorescence staining and dsDNA quantification were used to assess NET formation, and ELISA was applied to validate the expression of hub genes. Results Thirty-eight genes resulted from the intersection between 586 DEGs and 75 brown module genes, primarily enriched in leukocyte migration and NETs formation. Subsequently, four candidate hub genes (FCAR, MMP9, PADI4, and S100A12) were screened out via machine learning algorithms. Validation using an external dataset and nomogram model achieved better predictive value. Substantial NETs formation was demonstrated in IRI, with more pronounced NETs observed in patients with PGD ≥ 2. PADI4, S100A12, and MMP9 were all confirmed to be up-regulated after reperfusion through ELISA, with higher levels of S100A12 in PGD ≥ 2 patients compared with non-PGD patients. Conclusion We identified three potential NET-related biomarkers for IRI that provide new insights into early detection and potential therapeutic targets of IRI and PGD after lung transplantation.
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Affiliation(s)
- Jiameng Gao
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
- Shanghai Engineering Research Center of Lung Transplantation, Shanghai, People’s Republic of China
| | - Zhiyuan Zhang
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
- Shanghai Engineering Research Center of Lung Transplantation, Shanghai, People’s Republic of China
| | - Jing Yu
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
- Shanghai Engineering Research Center of Lung Transplantation, Shanghai, People’s Republic of China
| | - Nan Zhang
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
- Shanghai Engineering Research Center of Lung Transplantation, Shanghai, People’s Republic of China
| | - Yu Fu
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
- Shanghai Engineering Research Center of Lung Transplantation, Shanghai, People’s Republic of China
| | - Xuemei Jiang
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
- Shanghai Engineering Research Center of Lung Transplantation, Shanghai, People’s Republic of China
| | - Zheyu Xia
- School of Medicine, Tongji University, Shanghai, People’s Republic of China
| | - Qingqing Zhang
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
- Shanghai Engineering Research Center of Lung Transplantation, Shanghai, People’s Republic of China
| | - Zongmei Wen
- Department of Anesthesiology, Shanghai Pulmonary Hospital, School of Medicine, Tongji University, Shanghai, People’s Republic of China
- Shanghai Engineering Research Center of Lung Transplantation, Shanghai, People’s Republic of China
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Xu L, Cai M. Tacrolimus Maintains the Balance of Neutrophil Extracellular Traps by Inducing DNA Methylation of Neutrophils to Reduce Immune Rejection. Life (Basel) 2023; 13:2253. [PMID: 38137854 PMCID: PMC10744459 DOI: 10.3390/life13122253] [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: 10/17/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 12/24/2023] Open
Abstract
Immune rejection is a significant concern in organ transplantation, as it can lead to damage to and failure of the transplanted organ. To prevent or treat immune rejection, transplant recipients are commonly administered immunosuppressive drugs. Tacrolimus (FK506) is a widely used immunosuppressive drug in organ transplantation. The excessive formation of neutrophil extracellular traps (NETs) can contribute to inflammation and tissue damage. Although NETs play an antimicrobial role, their overproduction can be harmful. To investigate the mechanism by which FK506 suppresses immune rejection, we utilized HL-60 cells, which were differentiated into neutrophils using DMSO and induced to form NETs with phorbol myristate acetate (PMA), a very efficient and frequently used drug for inducing NET formation. By comparing pre- and post-treatment with FK506, we examined whether FK506 affects the formation of NETs. Various experimental techniques were employed, including confocal imaging for visualizing cell NETs, qPCR and Western blotting for gene and protein expression analyses, ELISAs for protein content detection, and LC-MS/MS for methylation detection. In our study, we discovered that FK506 can enhance DNA methylation, which likely contributes to the reduction in NETs. Genes and proteins related to methylation, namely, DNMT3B and TET3, exhibited significant correlations with methylation. Consistent changes in both genes and proteins suggest that DNMT3B and TET3 are key factors that are influenced by FK506, resulting in enhanced DNA methylation and the potential inhibition of PMA-induced NET production. In summary, we have identified a novel mechanism by which FK506 inhibits NET production through the enhancement of DNA methylation. This finding highlights a new aspect of FK506's immunosuppressive effect. Our results provide valuable insights for clinical research, immunosuppression, and organ preservation strategies.
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Affiliation(s)
| | - Ming Cai
- Department of Urology, The Third Medical Center of Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing 100853, China;
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Wu S, Zhang X, Wang Y, Zheng H, Zhu M. Lipid Metabolism Reprogramming of Immune Cells in Acne: An Update. Clin Cosmet Investig Dermatol 2023; 16:2391-2398. [PMID: 37675181 PMCID: PMC10478778 DOI: 10.2147/ccid.s424478] [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: 06/05/2023] [Accepted: 08/15/2023] [Indexed: 09/08/2023]
Abstract
Acne vulgaris is one of the most widespread skin conditions and the main reason for visiting a dermatologist. Inflammatory response and abnormal infiltrations of immune cells are the main pathogenesis of acne. The increased lipid is the prerequisite for the acne, and the perturbation of lipid composition and content is consistent with the severity of acne. Furthermore, the increased lipid production not only contributes to the occurrence and development of acne, but also sensitizes the function of immune cells. The lipid metabolic dysfunction aggravates the severity of local tissue and provides pro-inflammatory-cytokine cues, which indicates the crucial roles of lipid metabolism on immune cells. Recent advances have demonstrated the lipid metabolism reprogramming of various immune cells in acne lesion. The abnormal lipid accumulation, lipolysis, and fatty acid oxidation lead to the activation and differentiation of immune cells, which promotes the pro-inflammatory cytokines production. Thus, this review discusses the emerging role of lipid metabolism reprogramming of immune cells in the progress of acne and aims to constitute food for others' projects involved in acne research.
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Affiliation(s)
- Shuhui Wu
- Department of Dermatology, Key Laboratory of Vascular Biology and Translational Medicine, Education Department of Hunan Province, The Second Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, People’s Republic of China
| | - Xi Zhang
- Department of Physical Education and Health Promotion, Hunan University of Technology and Business, Changsha, Hunan, People’s Republic of China
| | - Yun Wang
- Department of Dermatology, Key Laboratory of Vascular Biology and Translational Medicine, Education Department of Hunan Province, The Second Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, People’s Republic of China
| | - Huie Zheng
- Department of Dermatology, Key Laboratory of Vascular Biology and Translational Medicine, Education Department of Hunan Province, The Second Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, People’s Republic of China
| | - Mingfang Zhu
- Department of Dermatology, Key Laboratory of Vascular Biology and Translational Medicine, Education Department of Hunan Province, The Second Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan, People’s Republic of China
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