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Martin KR, Gamell C, Tai TY, Bonelli R, Hansen J, Tatoulis J, Alhamdoosh M, Wilson N, Wicks I. Whole blood transcriptomics reveals granulocyte colony-stimulating factor as a mediator of cardiopulmonary bypass-induced systemic inflammatory response syndrome. Clin Transl Immunology 2024; 13:e1490. [PMID: 38375330 PMCID: PMC10875393 DOI: 10.1002/cti2.1490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 12/20/2023] [Accepted: 01/23/2024] [Indexed: 02/21/2024] Open
Abstract
Objectives Systemic inflammatory response syndrome (SIRS) is a frequent complication of cardiopulmonary bypass (CPB). SIRS is associated with significant morbidity and mortality, but its pathogenesis remains incompletely understood, and as a result, biomarkers are lacking and treatment remains expectant and supportive. This study aimed to understand the pathophysiological mechanisms driving SIRS induced by CPB and identify novel therapeutic targets that might reduce systemic inflammation and improve patient outcomes. Methods Twenty-one patients undergoing cardiac surgery and CPB were recruited, and blood was sampled before, during and after surgery. SIRS was defined using the American College of Chest Physicians/Society of Critical Care Medicine criteria. We performed immune cell profiling and whole blood transcriptomics and measured individual mediators in plasma/serum to characterise SIRS induced by CPB. Results Nineteen patients fulfilled criteria for SIRS, with a mean duration of 2.7 days. Neutrophil numbers rose rapidly with CPB and remained elevated for at least 48 h afterwards. Transcriptional signatures associated with neutrophil activation and degranulation were enriched during CPB. We identified a network of cytokines governing these transcriptional changes, including granulocyte colony-stimulating factor (G-CSF), a regulator of neutrophil production and function. Conclusions We identified neutrophils and G-CSF as major regulators of CPB-induced systemic inflammation. Short-term targeting of G-CSF could provide a novel therapeutic strategy to limit neutrophil-mediated inflammation and tissue damage in SIRS induced by CPB.
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Affiliation(s)
- Katherine R Martin
- WEHIParkvilleVICAustralia
- Department of Medical BiologyUniversity of MelbourneParkvilleVICAustralia
| | | | - Tsin Yee Tai
- WEHIParkvilleVICAustralia
- CSL Innovation, Bio21 InstituteParkvilleVICAustralia
| | - Roberto Bonelli
- WEHIParkvilleVICAustralia
- Department of Medical BiologyUniversity of MelbourneParkvilleVICAustralia
- CSL Innovation, Bio21 InstituteParkvilleVICAustralia
| | | | - James Tatoulis
- Cardiothoracic SurgeryRoyal Melbourne HospitalParkvilleVICAustralia
- Department of SurgeryUniversity of MelbourneParkvilleVICAustralia
| | | | | | - Ian Wicks
- WEHIParkvilleVICAustralia
- Department of Medical BiologyUniversity of MelbourneParkvilleVICAustralia
- Department of RheumatologyRoyal Melbourne HospitalParkvilleVICAustralia
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2
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Huang S, Chen Y, Gong F, Chen W, Zheng Y, Zhao B, Shi W, Yang Z, Qu H, Mao E, Chen E. Septic macrophages induce T cells immunosuppression in a cell-cell contact manner with the involvement of CR3. Heliyon 2024; 10:e23266. [PMID: 38187232 PMCID: PMC10770445 DOI: 10.1016/j.heliyon.2023.e23266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 11/21/2023] [Accepted: 11/29/2023] [Indexed: 01/09/2024] Open
Abstract
Background In addition to excessive inflammation, immunosuppression has been recognized as a contributing factor to poor prognosis of sepsis. Although it has been reported that T cells can become functionally impaired during sepsis, the underlying mechanisms responsible for this phenomenon remain unclear. This study aims to elucidate the mechanisms by which macrophages induce immunosuppression in T cells. Methods In an in vivo setting, C57BL-6J mice were subjected to cecal ligation and puncture (CLP) with or without depletion of macrophages, and the functions of T cells were assessed. In vitro experiments involved direct co-culture or separate culture of T cells and septic macrophages using a transwell system, followed by analysis of T cell immunity. Additionally, a siRNA targeting CD18 on macrophages was utilized to investigate the role of complement receptor 3 (CR3). Results Both macrophages and T cells exhibited immunosuppression during sepsis. In the in vivo experiments, the absence of macrophages partially alleviated T cell immunosuppression, as evidenced by restored vitality, increased production of TNF-α and IFN-γ, elevated CD8+ T cell levels, and decreased CD25+ T cell levels. In the in vitro experiments, direct co-culture of T cells with septic macrophages resulted in diminished T cell immunity, which was improved when T cells and macrophages were separated by a chamber wall. The expression of CR3 (CD11b/CD18) was upregulated on septic macrophages, and silencing of CD18 led to decreased TNF-α production by T cells, reduced CD4+ T cell numbers, and increased CD25+ T cell numbers. Conclusion In sepsis, macrophages induce immunosuppression in T cells through direct cell-cell contact, with the involvement of CR3.
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Affiliation(s)
- Shunwei Huang
- Department of Emergency, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine. Shanghai, China
| | - Ying Chen
- Department of Emergency, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine. Shanghai, China
| | - Fangchen Gong
- Department of Emergency, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine. Shanghai, China
| | - Weiwei Chen
- Department of Emergency, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine. Shanghai, China
| | - Yanjun Zheng
- Department of Emergency, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine. Shanghai, China
| | - Bing Zhao
- Department of Emergency, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine. Shanghai, China
| | - Wen Shi
- Department of Emergency, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine. Shanghai, China
| | - Zhitao Yang
- Department of Emergency, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine. Shanghai, China
| | - Hongping Qu
- Department of Intensive Care, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine. Shanghai, China
| | - Enqiang Mao
- Department of Emergency, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine. Shanghai, China
| | - Erzhen Chen
- Department of Emergency, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine. Shanghai, China
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3
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Barbour A, Smith L, Oveisi M, Williams M, Huang RC, Marks C, Fine N, Sun C, Younesi F, Zargaran S, Orugunty R, Horvath TD, Haidacher SJ, Haag AM, Sabharwal A, Hinz B, Glogauer M. Discovery of phosphorylated lantibiotics with proimmune activity that regulate the oral microbiome. Proc Natl Acad Sci U S A 2023; 120:e2219392120. [PMID: 37216534 PMCID: PMC10235938 DOI: 10.1073/pnas.2219392120] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 04/15/2023] [Indexed: 05/24/2023] Open
Abstract
Lantibiotics are ribosomally synthesized and posttranslationally modified peptides (RiPPs) that are produced by bacteria. Interest in this group of natural products is increasing rapidly as alternatives to conventional antibiotics. Some human microbiome-derived commensals produce lantibiotics to impair pathogens' colonization and promote healthy microbiomes. Streptococcus salivarius is one of the first commensal microbes to colonize the human oral cavity and gastrointestinal tract, and its biosynthesis of RiPPs, called salivaricins, has been shown to inhibit the growth of oral pathogens. Herein, we report on a phosphorylated class of three related RiPPs, collectively referred to as salivaricin 10, that exhibit proimmune activity and targeted antimicrobial properties against known oral pathogens and multispecies biofilms. Strikingly, the immunomodulatory activities observed include upregulation of neutrophil-mediated phagocytosis, promotion of antiinflammatory M2 macrophage polarization, and stimulation of neutrophil chemotaxis-these activities have been attributed to the phosphorylation site identified on the N-terminal region of the peptides. Salivaricin 10 peptides were determined to be produced by S. salivarius strains found in healthy human subjects, and their dual bactericidal/antibiofilm and immunoregulatory activity may provide new means to effectively target infectious pathogens while maintaining important oral microbiota.
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Affiliation(s)
- Abdelahhad Barbour
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada
| | - Leif Smith
- Department of Biology, College of Science, Texas A&M University, College Station, TX 77843
| | - Morvarid Oveisi
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada
| | - McKinley Williams
- Department of Biology, College of Science, Texas A&M University, College Station, TX 77843
| | - Ruo Chen Huang
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada
| | - Cara Marks
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada
| | - Noah Fine
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada
| | - Chunxiang Sun
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada
| | - Fereshteh Younesi
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada
- Laboratory of Tissue Repair and Regeneration, Keenan Research Centre for Biomedical Science of the St. Michael's Hospital, Toronto, ON M5B 1T8, Canada
| | - Sina Zargaran
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada
| | | | - Thomas D Horvath
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX 77030
- Texas Children's Microbiome Center, Texas Children's Hospital, Houston, TX 77030
| | - Sigmund J Haidacher
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX 77030
- Texas Children's Microbiome Center, Texas Children's Hospital, Houston, TX 77030
| | - Anthony M Haag
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX 77030
- Texas Children's Microbiome Center, Texas Children's Hospital, Houston, TX 77030
| | - Amarpreet Sabharwal
- Schulich School of Medicine and Dentistry, Western University, London, ON N6A 5C1, Canada
| | - Boris Hinz
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada
- Laboratory of Tissue Repair and Regeneration, Keenan Research Centre for Biomedical Science of the St. Michael's Hospital, Toronto, ON M5B 1T8, Canada
| | - Michael Glogauer
- Faculty of Dentistry, University of Toronto, Toronto, ON M5G 1G6, Canada
- Department of Dental Oncology, Maxillofacial and Ocular Prosthetics, Princess Margaret Cancer Centre, Toronto, ON M5G 2M9, Canada
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4
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Siekacz K, Kumor-Kisielewska A, Miłkowska-Dymanowska J, Pietrusińska M, Bartczak K, Majewski S, Stańczyk A, Piotrowski WJ, Białas AJ. Soluble ITGaM and ITGb2 Integrin Subunits Are Involved in Long-Term Pulmonary Complications after COVID-19 Infection. J Clin Med 2023; 12:jcm12010342. [PMID: 36615143 PMCID: PMC9821073 DOI: 10.3390/jcm12010342] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 12/28/2022] [Accepted: 12/29/2022] [Indexed: 01/03/2023] Open
Abstract
(1) Introduction: The role of soluble integrins in post-COVID-19 complications is unclear, especially in long-term pulmonary lesions. The purpose of this study was to investigate the association between soluble ITGa2, ITGaM and ITGb2 integrin subunits and long COVID-19 pulmonary complications. (2) Methodology: Post-COVID-19 patients were enrolled. According to the evidence of persistent interstitial lung lesions on CT, patients were divided into a long-term pulmonary complications group (P(+)) and a control group without long-term pulmonary complications (P(-)). We randomly selected 80 patients for further investigation (40 subjects for each group). Levels of ITGa2, ITGaM and ITGb2 integrin subunits were determined by ELISA assay. (3) Results: The serum concentration of sITGaM and sITGb2 were significantly higher in the P(+) group (sITGaM 18.63 ng/mL [IQR 14.17-28.83] vs. 14.75 ng/mL [IQR 10.91-20] p = 0.01 and sITGb2 10.55 ng/mL [IQR 6.53-15.83] vs. 6.34 ng/mL [IQR 4.98-9.68] p = 0.002). We observed a statistically significant correlation between sITGaM and sITGb2 elevation in the P(+) group (R = 0.42; p = 0.01). Patients from the P(+) group had a lower (1.82 +/-0.84 G/L) lymphocyte level than the P(-)group (2.28 +/-0.79 G/L), p = 0.03. Furthermore, we observed an inverse correlation in the P(-) group between blood lymphocyte count and sITGb2 integrin subunit levels (R = -0.49 p = 0.01). (4) Conclusions: Elevated concentrations of sITGaM and sITGb2 were associated with long-term pulmonary complications in post-COVID-19 patients. Both sITGaM and sITGb2 may be promising biomarkers for predicting pulmonary complications and could be a potential target for therapeutic intervention in post-COVID-19 patients.
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Affiliation(s)
- Kamil Siekacz
- Department of Pneumology, Medical University of Lodz, 90-419 Lodz, Poland
| | | | | | | | - Krystian Bartczak
- Department of Pneumology, Medical University of Lodz, 90-419 Lodz, Poland
| | - Sebastian Majewski
- Department of Pneumology, Medical University of Lodz, 90-419 Lodz, Poland
| | - Adam Stańczyk
- Department of Clinical Pharmacology, Medical University of Lodz, 90-419 Lodz, Poland
| | | | - Adam J. Białas
- Department of Pneumology, Medical University of Lodz, 90-419 Lodz, Poland
- Department of Pulmonary Rehabilitation, Regional Medical Center for Lung Diseases and Rehabilitation, 91-520 Lodz, Poland
- Correspondence:
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5
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Hu Y, Liu S, Liu W, Zhang Z, Liu Y, Sun D, Zhang M, Fang J. Bioinformatics analysis of genes related to iron death in diabetic nephropathy through network and pathway levels based approaches. PLoS One 2021; 16:e0259436. [PMID: 34735495 PMCID: PMC8568295 DOI: 10.1371/journal.pone.0259436] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 10/20/2021] [Indexed: 12/16/2022] Open
Abstract
Diabetic nephropathy is one of the common microvascular complications of diabetes. Iron death is a recently reported way of cell death. To explore the effects of iron death on diabetic nephropathy, iron death score of diabetic nephropathy was analyzed based on the network and pathway levels. Furthermore, markers related to iron death were screened. Using RNA-seq data of diabetic nephropathy, samples were clustered uniformly and the disease was classified. Differentially expressed gene analysis was conducted on the typed disease samples, and the WGCNA algorithm was used to obtain key modules. String database was used to perform protein interaction analysis on key module genes for the selection of Hub genes. Moreover, principal component analysis method was applied to get transcription factors and non-coding genes, which interact with the Hub gene. All samples can be divided into two categories and principal component analysis shows that the two categories are significantly different. Hub genes (FPR3, C3AR1, CD14, ITGB2, RAC2 and ITGAM) related to iron death in diabetic nephropathy were obtained through gene expression differential analysis between different subtypes. Non-coding genes that interact with Hub genes, including hsa-miR-572, hsa-miR-29a-3p, hsa-miR-29b-3p, hsa-miR-208a-3p, hsa-miR-153-3p and hsa-miR-29c-3p, may be related to diabetic nephropathy. Transcription factors HIF1α, KLF4, KLF5, RUNX1, SP1, VDR and WT1 may be related to diabetic nephropathy. The above factors and Hub genes are collectively involved in the occurrence and development of diabetic nephropathy, which can be further studied in the future. Moreover, these factors and genes may be potential target for therapeutic drugs.
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Affiliation(s)
- Yaling Hu
- Shanxi Medical University, Taiyuan, Shanxi, China
- Department of Nephrology, The First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Shuang Liu
- Department of Urology, The First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Wenyuan Liu
- Department of Nephrology, The First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Ziyuan Zhang
- Department of Nephrology, The First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Yuxiang Liu
- Shanxi Medical University, Taiyuan, Shanxi, China
| | - Dalin Sun
- Department of Nephrology, The First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Mingyu Zhang
- Shanxi Medical University, Taiyuan, Shanxi, China
| | - Jingai Fang
- Department of Nephrology, The First Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
- * E-mail:
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6
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Kauer J, Vogt F, Hagelstein I, Hörner S, Märklin M, Maurer S, Salih HR, Jung G, Zekri L. CD18 Antibody Application Blocks Unwanted Off-Target T Cell Activation Caused by Bispecific Antibodies. Cancers (Basel) 2021; 13:cancers13184596. [PMID: 34572822 PMCID: PMC8467378 DOI: 10.3390/cancers13184596] [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: 07/22/2021] [Revised: 09/03/2021] [Accepted: 09/10/2021] [Indexed: 11/16/2022] Open
Abstract
Simple Summary Bispecific antibodies are a very effective immunotherapy against different types of cancer since they activate T cells in the presence of tumor cells. However, they can cause severe side effects, such as a systemic inflammation called cytokine release syndrome. We aimed to clarify an important mechanism that causes cytokine release syndrome. In cocultures of T cells with endothelial cells or lymphoid cells, application of bispecific antibodies can induce T cell activation and cytokine release in the absence of tumor cells. By blocking the adhesion molecule CD18, this interaction is interrupted and the unwanted T cell activation is diminished. CD18 blockade, however, does not interfere with T cell activation when tumor cells are present. Therefore, CD18 blockade could prevent side effects of bispecific antibodies without decreasing the anti-tumor effect. Abstract T cell-recruiting bispecific antibodies (bsAbs) are successfully used for the treatment of cancer. However, effective treatment with bsAbs is so far hampered by severe side effects, i.e., potentially life-threatening cytokine release syndrome. Off-target T cell activation due to binding of bispecific CD3 antibodies to T cells in the absence of target cells may contribute to excessive cytokine release. We report here, in an in vitro setting, that off-target T cell activation is induced by bsAbs with high CD3 binding affinity and increased by endothelial- or lymphoid cells that act as stimulating bystander cells. Blocking antibodies directed against the adhesion molecules CD18/CD54 or CD2/CD58 markedly reduced this type of off-target T cell activation. CD18 blockade—in contrast to CD2—did not affect the therapeutic activity of various bsAbs. Since CD18 antibodies have been shown to be safely applicable in patients, blockade of this integrin holds promise as a potential target for the prevention of unwanted off-target T cell activation and allows the application of truly effective bsAb doses.
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Affiliation(s)
- Joseph Kauer
- German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ) Partner Site Tübingen, Department of Immunology, Interfaculty Institute for Cell Biology, University of Tübingen, 72076 Tübingen, Germany; (F.V.); (S.H.); (G.J.); (L.Z.)
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tübingen, 72076 Tübingen, Germany; (I.H.); (M.M.); (S.M.); (H.R.S.)
- Department of Oncology and Hematology, University Clinic Heidelberg, 69118 Heidelberg, Germany
- Correspondence: ; Tel.: +49-06221-56-8611
| | - Fabian Vogt
- German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ) Partner Site Tübingen, Department of Immunology, Interfaculty Institute for Cell Biology, University of Tübingen, 72076 Tübingen, Germany; (F.V.); (S.H.); (G.J.); (L.Z.)
| | - Ilona Hagelstein
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tübingen, 72076 Tübingen, Germany; (I.H.); (M.M.); (S.M.); (H.R.S.)
- DFG Cluster of Excellence 2180 ‘Image-Guided and Functional Instructed Tumor Therapy’ (iFIT), Eberhard Karls University, 72076 Tübingen, Germany
| | - Sebastian Hörner
- German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ) Partner Site Tübingen, Department of Immunology, Interfaculty Institute for Cell Biology, University of Tübingen, 72076 Tübingen, Germany; (F.V.); (S.H.); (G.J.); (L.Z.)
| | - Melanie Märklin
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tübingen, 72076 Tübingen, Germany; (I.H.); (M.M.); (S.M.); (H.R.S.)
- DFG Cluster of Excellence 2180 ‘Image-Guided and Functional Instructed Tumor Therapy’ (iFIT), Eberhard Karls University, 72076 Tübingen, Germany
| | - Stefanie Maurer
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tübingen, 72076 Tübingen, Germany; (I.H.); (M.M.); (S.M.); (H.R.S.)
- DFG Cluster of Excellence 2180 ‘Image-Guided and Functional Instructed Tumor Therapy’ (iFIT), Eberhard Karls University, 72076 Tübingen, Germany
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Helmut R. Salih
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tübingen, 72076 Tübingen, Germany; (I.H.); (M.M.); (S.M.); (H.R.S.)
- DFG Cluster of Excellence 2180 ‘Image-Guided and Functional Instructed Tumor Therapy’ (iFIT), Eberhard Karls University, 72076 Tübingen, Germany
| | - Gundram Jung
- German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ) Partner Site Tübingen, Department of Immunology, Interfaculty Institute for Cell Biology, University of Tübingen, 72076 Tübingen, Germany; (F.V.); (S.H.); (G.J.); (L.Z.)
| | - Latifa Zekri
- German Cancer Consortium (DKTK) and German Cancer Research Center (DKFZ) Partner Site Tübingen, Department of Immunology, Interfaculty Institute for Cell Biology, University of Tübingen, 72076 Tübingen, Germany; (F.V.); (S.H.); (G.J.); (L.Z.)
- Clinical Collaboration Unit Translational Immunology, German Cancer Consortium (DKTK), Department of Internal Medicine, University Hospital Tübingen, 72076 Tübingen, Germany; (I.H.); (M.M.); (S.M.); (H.R.S.)
- DFG Cluster of Excellence 2180 ‘Image-Guided and Functional Instructed Tumor Therapy’ (iFIT), Eberhard Karls University, 72076 Tübingen, Germany
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Abstract
Sepsis remains medically challenging, with high morbidity and mortality. A novel intervention is urgently needed in the absence of specific, targeted therapy. Neutrophils act as double-edged swords in sepsis; they can help to eradicate microbes, but they also contribute to tissue injury. β2 integrins are critical adhesion molecules that regulate a number of neutrophil functions. β2 integrins consist of four members, namely, αLβ2, αMβ2, αXβ2, and αDβ2. Here, we review the role of each β2 integrin in neutrophils and sepsis and consider future direction for therapeutic intervention.
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8
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Sun X, Dai Y, Tan G, Liu Y, Li N. Integration Analysis of m 6A-SNPs and eQTLs Associated With Sepsis Reveals Platelet Degranulation and Staphylococcus aureus Infection are Mediated by m 6A mRNA Methylation. Front Genet 2020; 11:7. [PMID: 32174955 PMCID: PMC7054457 DOI: 10.3389/fgene.2020.00007] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 01/06/2020] [Indexed: 12/22/2022] Open
Abstract
Sepsis is a major threat with high mortality rate for critically ill patients. Response to pathogen infection by the host immune system is a key biological process involved in the onset and development of sepsis. Heterogeneous host genome variation, especially single nucleotide polymorphisms (SNPs), has long been suggested to contribute to differences in disease progression. However, the function of SNPs located in non-coding regions remains to be elucidated. Recently, m6A mRNA modification levels were revealed to differ at SNPs. As m6A is a crucial regulator of gene expression, these SNPs might control genes by changing the m6A level on mRNA. To investigate the potential role of m6A SNPs in sepsis, we integrated m6A-SNP and expression quantitative trait loci (eQTLs) data. Analysis revealed 15,720 m6A-cis-eQTLs and 381 m6A-trans-eQTLs associated with sepsis. We identified 1321 genes as locations of m6A-cis-eQTLs. These were enriched in platelet degranulation and Staphylococcus aureus infection pathways, which are vital for the pathophysiological process of sepsis. We conclude that m6A modification of mRNA plays a very important role in sepsis, with m6A-cis-eQTLs potentially having the most effect on individual variation in sepsis progression.
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Affiliation(s)
- Xuri Sun
- Department of Critical Care Medicine, The Second Affiliated Hospital, Fujian Medical University, Quanzhou, China.,Respiratory Medicine Center of Fujian Province, Quanzhou, China
| | - Yishuang Dai
- Department of Outpatient operating room, The Second Affiliated Hospital, Fujian Medical University, Quanzhou, China
| | - Guoliang Tan
- Department of Critical Care Medicine, The Second Affiliated Hospital, Fujian Medical University, Quanzhou, China.,Respiratory Medicine Center of Fujian Province, Quanzhou, China
| | - Yuqi Liu
- Department of Critical Care Medicine, The Second Affiliated Hospital, Fujian Medical University, Quanzhou, China.,Respiratory Medicine Center of Fujian Province, Quanzhou, China
| | - Neng Li
- Department of Pathogenic Biology, School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
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9
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Xin K, Sun J, Liu P, Ge J, Leng C, Pang F. Expression and significance of HMGB1 in patients with sepsis and effects on prognosis. ALL LIFE 2020. [DOI: 10.1080/26895293.2020.1734671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Affiliation(s)
- Keke Xin
- Department of Surgical Intensive Care Unit, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, People’s Republic of China
| | - Junli Sun
- Department of Surgical Intensive Care Unit, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, People’s Republic of China
| | - Ping Liu
- Department of Surgical Intensive Care Unit, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, People’s Republic of China
| | - Jianlin Ge
- Department of Surgical Intensive Care Unit, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, People’s Republic of China
| | - Chenghui Leng
- Department of Surgical Intensive Care Unit, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, People’s Republic of China
| | - Feng Pang
- Department of Cardiothoracic Surgery, People's Hospital, Guangxi Zhuang Autonomous Region, Nanning, People's Republic of China
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10
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Vorup-Jensen T, Jensen RK. Structural Immunology of Complement Receptors 3 and 4. Front Immunol 2018; 9:2716. [PMID: 30534123 PMCID: PMC6275225 DOI: 10.3389/fimmu.2018.02716] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Accepted: 11/05/2018] [Indexed: 01/10/2023] Open
Abstract
Complement receptors (CR) 3 and 4 belong to the family of beta-2 (CD18) integrins. CR3 and CR4 are often co-expressed in the myeloid subsets of leukocytes, but they are also found in NK cells and activated T and B lymphocytes. The heterodimeric ectodomain undergoes considerable conformational change in order to switch the receptor from a structurally bent, ligand-binding in-active state into an extended, ligand-binding active state. CR3 binds the C3d fragment of C3 in a way permitting CR2 also to bind concomitantly. This enables a hand-over of complement-opsonized antigens from the cell surface of CR3-expressing macrophages to the CR2-expressing B lymphocytes, in consequence acting as an antigen presentation mechanism. As a more enigmatic part of their functions, both CR3 and CR4 bind several structurally unrelated proteins, engineered peptides, and glycosaminoglycans. No consensus motif in the proteinaceous ligands has been established. Yet, the experimental evidence clearly suggest that the ligands are primarily, if not entirely, recognized by a single site within the receptors, namely the metal-ion dependent adhesion site (MIDAS). Comparison of some recent identified ligands points to CR3 as inclined to bind positively charged species, while CR4, by contrast, binds strongly negative-charged species, in both cases with the critical involvement of deprotonated, acidic groups as ligands for the Mg2+ ion in the MIDAS. These properties place CR3 and CR4 firmly within the realm of modern molecular medicine in several ways. The expression of CR3 and CR4 in NK cells was recently demonstrated to enable complement-dependent cell cytotoxicity toward antibody-coated cancer cells as part of biological therapy, constituting a significant part of the efficacy of such treatment. With the flexible principles of ligand recognition, it is also possible to propose a response of CR3 and CR4 to existing medicines thereby opening a possibility of drug repurposing to influence the function of these receptors. Here, from advances in the structural and cellular immunology of CR3 and CR4, we review insights on their biochemistry and functions in the immune system.
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Affiliation(s)
- Thomas Vorup-Jensen
- Biophysical Immunology Laboratory, Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Interdisciplinary Nanoscience Center, Aarhus University, Aarhus, Denmark
| | - Rasmus Kjeldsen Jensen
- Department of Molecular Biology and Genetics-Structural Biology, Aarhus University, Aarhus, Denmark
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11
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Støy S, Sandahl TD, Hansen AL, Deleuran B, Vorup-Jensen T, Vilstrup H, Kragstrup TW. Decreased monocyte shedding of the migration inhibitor soluble CD18 in alcoholic hepatitis. Clin Transl Gastroenterol 2018; 9:160. [PMID: 29904132 PMCID: PMC6002386 DOI: 10.1038/s41424-018-0022-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Revised: 02/23/2018] [Accepted: 03/13/2018] [Indexed: 02/08/2023] Open
Abstract
OBJECTIVES During alcoholic hepatitis (AH) monocytes traverse the vascular boundaries and massively invade the liver. In principle, tissue extravasation can be limited through shedding of CD18 integrins from leukocytes, including monocytes. The soluble (s) product sCD18 conceals adhesion receptors on the endothelium, which reduces monocyte extravasation. In AH, monocytes are dysfunctional, but whether this involves their self-generated anti-migration is unknown. Our aim was, therefore, to investigate monocyte CD18 dynamics in AH. METHODS We studied 50 AH patients and 20 healthy controls. We measured monocyte expression and conformational activation of CD18, plasma (P)-sCD18, stimulated in vitro CD18 shedding and P-sCD18 in a short-term chronic-binge mouse model. RESULTS AH-derived monocytes had a 30-60% higher expression of active CD18 receptors (p < 0.01), but the sCD18 concentration per monocyte was reduced in vivo by 30% and in vitro by 120% (p < 0.01). Ethanol reduced the in vitro shedding of CD18 in the patients only. TNFα increased sCD18 concentration per monocyte, but less so in the patients (p < 0.04). P-sCD18 per monocyte was inversely related to disease severity. In early alcoholic liver disease, P-sCD18 was decreased in the mouse model. CONCLUSIONS The monocyte CD18 integrins are highly activated in AH and the single monocyte shedding of CD18 was decreased favoring tissue extravasation. Alcohol in itself and altered monocyte responsiveness to TNFα may explain this lowered shedding. TRANSLATIONAL IMPACT The contribution of this mechanism to the excessive monocyte liver infiltration in AH should be further explored as it may serve as a potential therapeutic target to limit liver inflammation.
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Affiliation(s)
- Sidsel Støy
- Department of Hepatology and Gastroenterology, Aarhus University Hospital, Aarhus, Denmark.
| | | | | | - Bent Deleuran
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark
| | | | - Hendrik Vilstrup
- Department of Hepatology and Gastroenterology, Aarhus University Hospital, Aarhus, Denmark
| | - Tue Wenzel Kragstrup
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Department of Rheumatology, Aarhus University Hospital, Aarhus, Denmark
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12
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Wolf D, Anto-Michel N, Blankenbach H, Wiedemann A, Buscher K, Hohmann JD, Lim B, Bäuml M, Marki A, Mauler M, Duerschmied D, Fan Z, Winkels H, Sidler D, Diehl P, Zajonc DM, Hilgendorf I, Stachon P, Marchini T, Willecke F, Schell M, Sommer B, von Zur Muhlen C, Reinöhl J, Gerhardt T, Plow EF, Yakubenko V, Libby P, Bode C, Ley K, Peter K, Zirlik A. A ligand-specific blockade of the integrin Mac-1 selectively targets pathologic inflammation while maintaining protective host-defense. Nat Commun 2018; 9:525. [PMID: 29410422 PMCID: PMC5802769 DOI: 10.1038/s41467-018-02896-8] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Accepted: 01/05/2018] [Indexed: 12/22/2022] Open
Abstract
Integrin-based therapeutics have garnered considerable interest in the medical treatment of inflammation. Integrins mediate the fast recruitment of monocytes and neutrophils to the site of inflammation, but are also required for host defense, limiting their therapeutic use. Here, we report a novel monoclonal antibody, anti-M7, that specifically blocks the interaction of the integrin Mac-1 with its pro-inflammatory ligand CD40L, while not interfering with alternative ligands. Anti-M7 selectively reduces leukocyte recruitment in vitro and in vivo. In contrast, conventional anti-Mac-1 therapy is not specific and blocks a broad repertoire of integrin functionality, inhibits phagocytosis, promotes apoptosis, and fuels a cytokine storm in vivo. Whereas conventional anti-integrin therapy potentiates bacterial sepsis, bacteremia, and mortality, a ligand-specific intervention with anti-M7 is protective. These findings deepen our understanding of ligand-specific integrin functions and open a path for a new field of ligand-targeted anti-integrin therapy to prevent inflammatory conditions.
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Affiliation(s)
- Dennis Wolf
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany.,Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA, 92037, USA
| | - Nathaly Anto-Michel
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany
| | - Hermann Blankenbach
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany
| | - Ansgar Wiedemann
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany
| | - Konrad Buscher
- Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA, 92037, USA
| | - Jan David Hohmann
- Atherothrombosis and Vascular Biology, Baker Heart and Diabetes Institute, Melbourne, 8008, VIC, Australia
| | - Bock Lim
- Atherothrombosis and Vascular Biology, Baker Heart and Diabetes Institute, Melbourne, 8008, VIC, Australia
| | - Marina Bäuml
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany
| | - Alex Marki
- Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA, 92037, USA
| | - Maximilian Mauler
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany
| | - Daniel Duerschmied
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany
| | - Zhichao Fan
- Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA, 92037, USA
| | - Holger Winkels
- Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA, 92037, USA
| | - Daniel Sidler
- Division of Nephrology, Inselspital, Bern University Hospital, Bern, 3010, Switzerland
| | - Philipp Diehl
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany
| | - Dirk M Zajonc
- Division of Cell Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA, 92037, USA
| | - Ingo Hilgendorf
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany
| | - Peter Stachon
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany
| | - Timoteo Marchini
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany
| | - Florian Willecke
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany
| | - Maximilian Schell
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany.,Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA, 92037, USA
| | - Björn Sommer
- Neurosurgery, Medical Faculty of the University of Erlangen, Erlangen, 91054, Germany
| | - Constantin von Zur Muhlen
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany
| | - Jochen Reinöhl
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany
| | - Teresa Gerhardt
- Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA, 92037, USA
| | - Edward F Plow
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Valentin Yakubenko
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, 44195, USA
| | - Peter Libby
- Brigham and Women's Hospital, Cardiovascular Medicine, Harvard Medical School, Boston, MA, 02115, USA
| | - Christoph Bode
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany
| | - Klaus Ley
- Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA, 92037, USA
| | - Karlheinz Peter
- Atherothrombosis and Vascular Biology, Baker Heart and Diabetes Institute, Melbourne, 8008, VIC, Australia.
| | - Andreas Zirlik
- Cardiology and Angiology I, University Heart Center, and Medical Faculty, University of Freiburg, Freiburg, 79106, Germany
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