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Fialho S, Trieu-Cuot P, Ferreira P, Oliveira L. Could P2X7 receptor be a potencial target in neonatal sepsis? Int Immunopharmacol 2024; 142:112969. [PMID: 39241519 DOI: 10.1016/j.intimp.2024.112969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Revised: 07/31/2024] [Accepted: 08/15/2024] [Indexed: 09/09/2024]
Abstract
The United Nations Inter-Agency Group for Child Mortality Estimation (UNIGME) estimates that every year 2.5 million neonates die in their first month of life, accounting for nearly one-half of deaths in children under 5 years of age. Neonatal sepsis is the third leading cause of neonatal mortality. The worldwide burden of bacterial sepsis is expected to increase in the next decades due to the lack of effective molecular therapies to replace the administration of antibiotics whose efficacy is compromised by the emergence of resistant strains. In addition, prolonged exposure to antibiotics can have negative effects by increasing the risk of infection by other organisms. With the global burden of sepsis increasing and no vaccine nor other therapeutic approaches proved efficient, the World Health Organization (WHO) stresses the need for new therapeutic targets for sepsis treatment and infection prevention (WHO, A73/32). In response to this unresolved clinical issue, the P2X7 receptor (P2X7R), a key component of the inflammatory cascade, has emerged as a potential target for treating inflammatory/infection diseases. Indeed numerous studies have demonstrated the relevance of the purinergic system as a pharmacological target in addressing immune-mediated inflammatory diseases by regulating immunity, inflammation, and organ function. In this review, we analyze key features of sepsis immunopathophysiology focusing in neonatal sepsis and on how the immunomodulatory role of P2X7R could be a potential pharmacological target for reducing the burden of neonatal sepsis.
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Affiliation(s)
- Sales Fialho
- Department of ImmunoPhysiology and Pharmacology, ICBAS - School of Medicine and Biomedical Sciences - University of Porto, Porto, Portugal
| | - Patrick Trieu-Cuot
- Institut Pasteur, Université Paris Cité, Unité de Biologie des Bactéries Pathogènes à Gram-positif, Paris, France
| | - Paula Ferreira
- Department of ImmunoPhysiology and Pharmacology, ICBAS - School of Medicine and Biomedical Sciences - University of Porto, Porto, Portugal; Institute of Research and Innovation in Health (i3S), University of Porto, Porto, Portugal; Institute for Molecular and Cell Biology (IBMC), University of Porto, Porto, Portugal
| | - Laura Oliveira
- Department of ImmunoPhysiology and Pharmacology, ICBAS - School of Medicine and Biomedical Sciences - University of Porto, Porto, Portugal; Center for Drug Discovery and Innovative Medicines (MedInUP)/Rise Health, University of Porto, Portugal.
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Ham SD, Abraham MN, Deutschman CS, Taylor MD. Single-cell RNA sequencing reveals Immune Education promotes T cell survival in mice subjected to the cecal ligation and puncture sepsis model. Front Immunol 2024; 15:1366955. [PMID: 38562928 PMCID: PMC10982361 DOI: 10.3389/fimmu.2024.1366955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Accepted: 03/06/2024] [Indexed: 04/04/2024] Open
Abstract
Background Individual T cell responses vary significantly based on the microenvironment present at the time of immune response and on prior induced T cell memory. While the cecal ligation and puncture (CLP) model is the most commonly used murine sepsis model, the contribution of diverse T cell responses has not been explored. We defined T cell subset responses to CLP using single-cell RNA sequencing and examined the effects of prior induced T cell memory (Immune Education) on these responses. We hypothesized that Immune Education prior to CLP would alter T cell responses at the single cell level at a single, early post-CLP time point. Methods Splenic T cells were isolated from C57BL/6 mice. Four cohorts were studied: Control, Immune-Educated, CLP, and Immune-Educated CLP. At age 8 weeks, Immune-Educated and Immune-Educated CLP mice received anti-CD3ϵ antibody; Control and CLP mice were administered an isotype control. CLP (two punctures with a 22-gauge needle) was performed at 12-13 weeks of life. Mice were sacrificed at baseline or 24-hours post-CLP. Unsupervised clustering of the transcriptome library identified six distinct T cell subsets: quiescent naïve CD4+, primed naïve CD4+, memory CD4+, naïve CD8+, activated CD8+, and CD8+ cytotoxic T cell subsets. T cell subset specific gene set enrichment analysis and Hurdle analysis for differentially expressed genes (DEGs) were performed. Results T cell responses to CLP were not uniform - subsets of activated and suppressed T cells were identified. Immune Education augmented specific T cell subsets and led to genomic signatures favoring T cell survival in unoperated and CLP mice. Additionally, the combination of Immune Education and CLP effected the expression of genes related to T cell activity in ways that differed from CLP alone. Validating our finding that IL7R pathway markers were upregulated in Immune-Educated CLP mice, we found that Immune Education increased T cell surface IL7R expression in post-CLP mice. Conclusion Immune Education enhanced the expression of genes associated with T cell survival in unoperated and CLP mice. Induction of memory T cell compartments via Immune Education combined with CLP may increase the model's concordance to human sepsis.
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Affiliation(s)
- Steven D. Ham
- The Division of Critical Care Medicine, Department of Pediatrics, Cohen Children’s Medical Center/Northwell Health, New Hyde Park, NY, United States
- Sepsis Research Laboratory, The Feinstein Institutes for Medical Research, Manhasset, NY, United States
| | - Mabel N. Abraham
- The Division of Critical Care Medicine, Department of Pediatrics, Cohen Children’s Medical Center/Northwell Health, New Hyde Park, NY, United States
- Sepsis Research Laboratory, The Feinstein Institutes for Medical Research, Manhasset, NY, United States
| | - Clifford S. Deutschman
- The Division of Critical Care Medicine, Department of Pediatrics, Cohen Children’s Medical Center/Northwell Health, New Hyde Park, NY, United States
- Sepsis Research Laboratory, The Feinstein Institutes for Medical Research, Manhasset, NY, United States
| | - Matthew D. Taylor
- The Division of Critical Care Medicine, Department of Pediatrics, Cohen Children’s Medical Center/Northwell Health, New Hyde Park, NY, United States
- Sepsis Research Laboratory, The Feinstein Institutes for Medical Research, Manhasset, NY, United States
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3
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Abraham MN, Nedeljkovic-Kurepa A, Fernandes TD, Yaipen O, Brewer MR, Leisman DE, Taylor MD, Deutschman CS. M1 cholinergic signaling in the brain modulates cytokine levels and splenic cell sub-phenotypes following cecal ligation and puncture. Mol Med 2024; 30:22. [PMID: 38317082 PMCID: PMC10845657 DOI: 10.1186/s10020-024-00787-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 01/21/2024] [Indexed: 02/07/2024] Open
Abstract
BACKGROUND The contribution of the central nervous system to sepsis pathobiology is incompletely understood. In previous studies, administration of endotoxin to mice decreased activity of the vagus anti-inflammatory reflex. Treatment with the centrally-acting M1 muscarinic acetylcholine (ACh) receptor (M1AChR) attenuated this endotoxin-mediated change. We hypothesize that decreased M1AChR-mediated activity contributes to inflammation following cecal ligation and puncture (CLP), a mouse model of sepsis. METHODS In male C57Bl/6 mice, we quantified basal forebrain cholinergic activity (immunostaining), hippocampal neuronal activity, serum cytokine/chemokine levels (ELISA) and splenic cell subtypes (flow cytometry) at baseline, following CLP and following CLP in mice also treated with the M1AChR agonist xanomeline. RESULTS At 48 h. post-CLP, activity in basal forebrain cells expressing choline acetyltransferase (ChAT) was half of that observed at baseline. Lower activity was also noted in the hippocampus, which contains projections from ChAT-expressing basal forebrain neurons. Serum levels of TNFα, IL-1β, MIP-1α, IL-6, KC and G-CSF were higher post-CLP than at baseline. Post-CLP numbers of splenic macrophages and inflammatory monocytes, TNFα+ and ILβ+ neutrophils and ILβ+ monocytes were higher than baseline while numbers of central Dendritic Cells (cDCs), CD4+ and CD8+ T cells were lower. When, following CLP, mice were treated with xanomeline activity in basal forebrain ChAT-expressing neurons and in the hippocampus was significantly higher than in untreated animals. Post-CLP serum concentrations of TNFα, IL-1β, and MIP-1α, but not of IL-6, KC and G-CSF, were significantly lower in xanomeline-treated mice than in untreated mice. Post-CLP numbers of splenic neutrophils, macrophages, inflammatory monocytes and TNFα+ neutrophils also were lower in xanomeline-treated mice than in untreated animals. Percentages of IL-1β+ neutrophils, IL-1β+ monocytes, cDCs, CD4+ T cells and CD8+ T cells were similar in xanomeline-treated and untreated post-CLP mice. CONCLUSION Our findings indicate that M1AChR-mediated responses modulate CLP-induced alterations in serum levels of some, but not all, cytokines/chemokines and affected splenic immune response phenotypes.
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Affiliation(s)
- Mabel N Abraham
- Department of Pediatrics, Cohen Children's Medical Center, Northwell Health, New Hyde Park, New York, USA
- Sepsis Research Laboratories, The Feinstein Institutes for Medical Research, Northwell Health, Room 3140, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Ana Nedeljkovic-Kurepa
- Department of Pediatrics, Cohen Children's Medical Center, Northwell Health, New Hyde Park, New York, USA
- Sepsis Research Laboratories, The Feinstein Institutes for Medical Research, Northwell Health, Room 3140, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Tiago D Fernandes
- Department of Pediatrics, Cohen Children's Medical Center, Northwell Health, New Hyde Park, New York, USA
- Sepsis Research Laboratories, The Feinstein Institutes for Medical Research, Northwell Health, Room 3140, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Omar Yaipen
- Department of Pediatrics, Cohen Children's Medical Center, Northwell Health, New Hyde Park, New York, USA
- Sepsis Research Laboratories, The Feinstein Institutes for Medical Research, Northwell Health, Room 3140, 350 Community Drive, Manhasset, NY, 11030, USA
| | - Mariana R Brewer
- Department of Pediatrics, Cohen Children's Medical Center, Northwell Health, New Hyde Park, New York, USA
- Sepsis Research Laboratories, The Feinstein Institutes for Medical Research, Northwell Health, Room 3140, 350 Community Drive, Manhasset, NY, 11030, USA
- Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY, USA
| | - Daniel E Leisman
- Department of Medicine, Massachusetts General Hospital, Boston, USA
| | - Matthew D Taylor
- Department of Pediatrics, Cohen Children's Medical Center, Northwell Health, New Hyde Park, New York, USA
- Sepsis Research Laboratories, The Feinstein Institutes for Medical Research, Northwell Health, Room 3140, 350 Community Drive, Manhasset, NY, 11030, USA
- Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY, USA
| | - Clifford S Deutschman
- Department of Pediatrics, Cohen Children's Medical Center, Northwell Health, New Hyde Park, New York, USA.
- Sepsis Research Laboratories, The Feinstein Institutes for Medical Research, Northwell Health, Room 3140, 350 Community Drive, Manhasset, NY, 11030, USA.
- Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY, USA.
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Takahama M, Patil A, Richey G, Cipurko D, Johnson K, Carbonetto P, Plaster M, Pandey S, Cheronis K, Ueda T, Gruenbaum A, Kawamoto T, Stephens M, Chevrier N. A pairwise cytokine code explains the organism-wide response to sepsis. Nat Immunol 2024; 25:226-239. [PMID: 38191855 PMCID: PMC10834370 DOI: 10.1038/s41590-023-01722-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 11/29/2023] [Indexed: 01/10/2024]
Abstract
Sepsis is a systemic response to infection with life-threatening consequences. Our understanding of the molecular and cellular impact of sepsis across organs remains rudimentary. Here, we characterize the pathogenesis of sepsis by measuring dynamic changes in gene expression across organs. To pinpoint molecules controlling organ states in sepsis, we compare the effects of sepsis on organ gene expression to those of 6 singles and 15 pairs of recombinant cytokines. Strikingly, we find that the pairwise effects of tumor necrosis factor plus interleukin (IL)-18, interferon-gamma or IL-1β suffice to mirror the impact of sepsis across tissues. Mechanistically, we map the cellular effects of sepsis and cytokines by computing changes in the abundance of 195 cell types across 9 organs, which we validate by whole-mouse spatial profiling. Our work decodes the cytokine cacophony in sepsis into a pairwise cytokine message capturing the gene, cell and tissue responses of the host to the disease.
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Affiliation(s)
- Michihiro Takahama
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, USA
- Laboratory of Bioresponse Regulation, Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | | | - Gabriella Richey
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, USA
| | - Denis Cipurko
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, USA
| | - Katherine Johnson
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, USA
| | - Peter Carbonetto
- Department of Human Genetics, University of Chicago, Chicago, IL, USA
- Research Computing Center, University of Chicago, Chicago, IL, USA
| | - Madison Plaster
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, USA
| | - Surya Pandey
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, USA
| | - Katerina Cheronis
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, USA
| | - Tatsuki Ueda
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, USA
| | - Adam Gruenbaum
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, USA
| | | | - Matthew Stephens
- Department of Human Genetics, University of Chicago, Chicago, IL, USA
- Department of Statistics, University of Chicago, Chicago, IL, USA
| | - Nicolas Chevrier
- Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL, USA.
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5
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Huang J, Chen J, Wang C, Lai L, Mi H, Chen S. Deciphering the molecular classification of pediatric sepsis: integrating WGCNA and machine learning-based classification with immune signatures for the development of an advanced diagnostic model. Front Genet 2024; 15:1294381. [PMID: 38348451 PMCID: PMC10859440 DOI: 10.3389/fgene.2024.1294381] [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: 09/15/2023] [Accepted: 01/16/2024] [Indexed: 02/15/2024] Open
Abstract
Introduction: Pediatric sepsis (PS) is a life-threatening infection associated with high mortality rates, necessitating a deeper understanding of its underlying pathological mechanisms. Recently discovered programmed cell death induced by copper has been implicated in various medical conditions, but its potential involvement in PS remains largely unexplored. Methods: We first analyzed the expression patterns of cuproptosis-related genes (CRGs) and assessed the immune landscape of PS using the GSE66099 dataset. Subsequently, PS samples were isolated from the same dataset, and consensus clustering was performed based on differentially expressed CRGs. We applied weighted gene co-expression network analysis to identify hub genes associated with PS and cuproptosis. Results: We observed aberrant expression of 27 CRGs and a specific immune landscape in PS samples. Our findings revealed that patients in the GSE66099 dataset could be categorized into two cuproptosis clusters, each characterized by unique immune landscapes and varying functional classifications or enriched pathways. Among the machine learning approaches, Extreme Gradient Boosting demonstrated optimal performance as a diagnostic model for PS. Discussion: Our study provides valuable insights into the molecular mechanisms underlying PS, highlighting the involvement of cuproptosis-related genes and immune cell infiltration.
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Affiliation(s)
- Junming Huang
- Department of Urology, Guangxi Medical University Cancer Hospital, Nanning, Guangxi, China
- Department of Urology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Jinji Chen
- Department of Urology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Chengbang Wang
- Department of Urology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Lichuan Lai
- Department of Laboratory, The People’s Hospital of Guangxi Zhuang Autonomous Region, Nanning, Guangxi, China
| | - Hua Mi
- Department of Urology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Shaohua Chen
- Department of Urology, Guangxi Medical University Cancer Hospital, Nanning, Guangxi, China
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6
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Davies K, McLaren J. Destabilisation of T cell-dependent humoral immunity in sepsis. Clin Sci (Lond) 2024; 138:65-85. [PMID: 38197178 PMCID: PMC10781648 DOI: 10.1042/cs20230517] [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: 10/27/2023] [Revised: 12/14/2023] [Accepted: 01/02/2024] [Indexed: 01/11/2024]
Abstract
Sepsis is a heterogeneous condition defined as life-threatening organ dysfunction caused by a dysregulated host response to infection. For some, sepsis presents as a predominantly suppressive disorder, whilst others experience a pro-inflammatory condition which can culminate in a 'cytokine storm'. Frequently, patients experience signs of concurrent hyper-inflammation and immunosuppression, underpinning the difficulty in directing effective treatment. Although intensive care unit mortality rates have improved in recent years, one-third of discharged patients die within the following year. Half of post-sepsis deaths are due to exacerbation of pre-existing conditions, whilst half are due to complications arising from a deteriorated immune system. It has been suggested that the intense and dysregulated response to infection may induce irreversible metabolic reprogramming in immune cells. As a critical arm of immune protection in vertebrates, alterations to the adaptive immune system can have devastating repercussions. Indeed, a marked depletion of lymphocytes is observed in sepsis, correlating with increased rates of mortality. Such sepsis-induced lymphopenia has profound consequences on how T cells respond to infection but equally on the humoral immune response that is both elicited by B cells and supported by distinct CD4+ T follicular helper (TFH) cell subsets. The immunosuppressive state is further exacerbated by functional impairments to the remaining lymphocyte population, including the presence of cells expressing dysfunctional or exhausted phenotypes. This review will specifically focus on how sepsis destabilises the adaptive immune system, with a closer examination on how B cells and CD4+ TFH cells are affected by sepsis and the corresponding impact on humoral immunity.
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Affiliation(s)
- Kate Davies
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XN, U.K
| | - James E. McLaren
- Division of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XN, U.K
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7
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Abraham MN, Nedeljkovic-Kurepa A, Fernandes T, Yaipen O, Brewer MR, Taylor MD, Deutschman C. M1 Cholinergic Signaling Modulates Cytokine Levels and Splenocyte Sub-Phenotypes Following Cecal Ligation and Puncture. RESEARCH SQUARE 2023:rs.3.rs-3353062. [PMID: 37886474 PMCID: PMC10602092 DOI: 10.21203/rs.3.rs-3353062/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2023]
Abstract
Background The contribution of the central nervous system to sepsis pathobiology is incompletely understood. In previous studies, administration of endotoxin to mice decreased activity of the vagus anti-inflammatory reflex. Treatment with the centrally-acting M1/M4 muscarinic acetylcholine (ACh) receptor (M1/M4AChR) attenuated this endotoxin-mediated change. We hypothesize that decreased M1/M4AChR-mediated activity contributes to inflammation following cecal ligation and puncture (CLP), a mouse model of sepsis. Methods Basal forebrain cholinergic activity (immunostaining), serum cytokine/chemokine levels (ELISA) and splenocyte subtypes (flow cytometry) were examined at baseline and following CLP in male C57BL/6 male mice. Rersults At 48hrs. post-CLP, activity in basal forebrain cells expressing choline acetyltransferase (ChAT) was half of that observed at baseline. Lower activity was also noted in the hippocampus, which contains projections from ChAT-expressing basal forebrain neurons. Serum levels of TNFα, IL-1β, MIP-1α, IL-6, KC and G-CSF were higher post-CLP than at baseline. Post-CLP numbers of splenic macrophages and inflammatory monocytes, TNFa+ and ILb+ neutrophils and ILb+ monocytes were higher than baseline while numbers of central Dendritic Cells (cDCs), CD4+ and CD8+ T cells were lower. When, following CLP, mice were treated with xanomeline, a central-acting M1AChR agonist, activity in basal forebrain ChAT-expressing neurons and in the hippocampus was significantly higher than in untreated animals. Post-CLP serum concentrations of TNFα, IL-1β, and MIP-1α, but not of IL-6, KC and G-CSF, were significantly lower in xanomline-treated mice than in untreated mice. Post-CLP numbers of splenic neutrophils, macrophages, inflammatory monocytes and TNFα+ neutrophils also were lower in xanomeline-treated mice than in untreated animals. The effects of CLP on percentages of IL-1β+ neutrophils, IL-1β+ monocytes, cDCs, CD4+ T cells and CD8+ T cells were similar in xanomeline - treated and untreated post-CLP mice. Conclusion Our findings indicate that M1/M4AChR-mediated responses modulate CLP-induced alterations in the distribution of some, but not all, leukocyte phenotypes and certain cytokines and chemokines.
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Affiliation(s)
| | | | | | - Omar Yaipen
- Northwell Health Feinstein Institutes for Medical Research
| | | | | | - Clifford Deutschman
- Hofstra Northwell School of Medicine at Hofstra University: Donald and Barbara Zucker School of Medicine at Hofstra/Northwell
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8
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Gauthier J, Grégoire M, Reizine F, Lesouhaitier M, Desvois Y, Ghukasyan G, Moreau C, Amé P, Tarte K, Tadié JM, Delaloy C. Citrulline enteral administration markedly reduces immunosuppressive extrafollicular plasma cell differentiation in a preclinical model of sepsis. Eur J Immunol 2023; 53:e2250154. [PMID: 36564641 DOI: 10.1002/eji.202250154] [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: 08/26/2022] [Revised: 11/22/2022] [Accepted: 12/21/2022] [Indexed: 12/25/2022]
Abstract
The sustained immunosuppression associated with severe sepsis favors an increased susceptibility to secondary infections and remains incompletely understood. Plasmablast and plasma cell subsets, whose primary function is to secrete antibodies, have emerged as important suppressive populations that expand during sepsis. In particular, sepsis supports CD39hi plasmablast metabolic reprogramming associated with adenosine-mediated suppressive activity. Arginine deficiency has been linked to an increased risk of secondary infections in sepsis. Overcoming arginine shortage by citrulline administration efficiently improves sepsis-induced immunosuppression and secondary infections in the cecal ligation and puncture murine model. Here, we aimed to determine the impact of citrulline administration on B cell suppressive responses in sepsis. We demonstrate that restoring arginine bioavailability through citrulline administration markedly reduces the dominant extrafollicular B cell response, decreasing the immunosuppressive LAG3+ and CD39+ plasma cell populations, and restoring splenic follicles. At the molecular level, the IRF4/MYC-mediated B cell reprogramming required for extrafollicular plasma cell differentiation is shunted in the splenic B cells of mice fed with citrulline. Our study reveals a prominent impact of nutrition on B cell responses and plasma cell differentiation and further supports the development of citrulline-based clinical studies to prevent sepsis-associated immune dysfunction.
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Affiliation(s)
| | - Murielle Grégoire
- UMR INSERM S1236, LabEx IGO, Univ Rennes, EFS, Rennes, France
- CHU Rennes, SITI Laboratory, Pôle Biologie, Rennes, France
| | - Florian Reizine
- UMR INSERM S1236, LabEx IGO, Univ Rennes, EFS, Rennes, France
- CHU Rennes, SITI Laboratory, Pôle Biologie, Rennes, France
- CHU Rennes, Maladies Infectieuses et Réanimation Médicale, Rennes, France
| | - Mathieu Lesouhaitier
- UMR INSERM S1236, LabEx IGO, Univ Rennes, EFS, Rennes, France
- CHU Rennes, SITI Laboratory, Pôle Biologie, Rennes, France
- CHU Rennes, Maladies Infectieuses et Réanimation Médicale, Rennes, France
| | - Yoni Desvois
- UMR INSERM S1236, LabEx IGO, Univ Rennes, EFS, Rennes, France
| | | | - Caroline Moreau
- CHU Rennes, Laboratoire de Biochimie, Pôle Biologie, Rennes, France
- Univ Rennes, INSERM, EHESP, IRSET, UMR S1085, Rennes, France
| | - Patricia Amé
- UMR INSERM S1236, LabEx IGO, Univ Rennes, EFS, Rennes, France
- CHU Rennes, SITI Laboratory, Pôle Biologie, Rennes, France
| | - Karin Tarte
- UMR INSERM S1236, LabEx IGO, Univ Rennes, EFS, Rennes, France
- CHU Rennes, SITI Laboratory, Pôle Biologie, Rennes, France
| | - Jean-Marc Tadié
- UMR INSERM S1236, LabEx IGO, Univ Rennes, EFS, Rennes, France
- CHU Rennes, SITI Laboratory, Pôle Biologie, Rennes, France
- CHU Rennes, Maladies Infectieuses et Réanimation Médicale, Rennes, France
| | - Céline Delaloy
- UMR INSERM S1236, LabEx IGO, Univ Rennes, EFS, Rennes, France
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Takahama M, Patil A, Johnson K, Cipurko D, Miki Y, Taketomi Y, Carbonetto P, Plaster M, Richey G, Pandey S, Cheronis K, Ueda T, Gruenbaum A, Dudek SM, Stephens M, Murakami M, Chevrier N. Organism-Wide Analysis of Sepsis Reveals Mechanisms of Systemic Inflammation. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.30.526342. [PMID: 36778287 PMCID: PMC9915512 DOI: 10.1101/2023.01.30.526342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Sepsis is a systemic response to infection with life-threatening consequences. Our understanding of the impact of sepsis across organs of the body is rudimentary. Here, using mouse models of sepsis, we generate a dynamic, organism-wide map of the pathogenesis of the disease, revealing the spatiotemporal patterns of the effects of sepsis across tissues. These data revealed two interorgan mechanisms key in sepsis. First, we discover a simplifying principle in the systemic behavior of the cytokine network during sepsis, whereby a hierarchical cytokine circuit arising from the pairwise effects of TNF plus IL-18, IFN-γ, or IL-1β explains half of all the cellular effects of sepsis on 195 cell types across 9 organs. Second, we find that the secreted phospholipase PLA2G5 mediates hemolysis in blood, contributing to organ failure during sepsis. These results provide fundamental insights to help build a unifying mechanistic framework for the pathophysiological effects of sepsis on the body.
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10
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Dong X, Tu H, Qin S, Bai X, Yang F, Li Z. Insights into the Roles of B Cells in Patients with Sepsis. J Immunol Res 2023; 2023:7408967. [PMID: 37128298 PMCID: PMC10148744 DOI: 10.1155/2023/7408967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 04/02/2023] [Accepted: 04/04/2023] [Indexed: 05/03/2023] Open
Abstract
Sepsis is a life-threatening yet common disease, still posing high mortality worldwide. Sepsis-related deaths primarily occur during immunosuppression; the disease can hamper the numbers and function of B cells, which mediate innate and adaptive immune responses to maintain immune homeostasis. Dysfunction of B cells, along with aggravated immunosuppression, are closely related to poor prognosis. However, B cells in patients with sepsis have garnered little attention. This article focuses on the significance of B-cell subsets, including regulatory B cells, in sepsis and how the counts and function of circulating B cells are affected in patients with sepsis. Finally, potential B-cell-related immunotherapies for sepsis are explored.
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Affiliation(s)
- Xijie Dong
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Hao Tu
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Shuang Qin
- Department of Radiation Oncology, Hubei Cancer Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiangjun Bai
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Fan Yang
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Zhanfei Li
- Trauma Center/Department of Emergency and Traumatic Surgery, Tongji Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
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11
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Ma C, Liu H, Yang S, Li H, Liao X, Kang Y. The emerging roles and therapeutic potential of B cells in sepsis. Front Pharmacol 2022; 13:1034667. [PMID: 36425582 PMCID: PMC9679374 DOI: 10.3389/fphar.2022.1034667] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 10/26/2022] [Indexed: 01/03/2024] Open
Abstract
Sepsis is a life-threatening syndrome caused by anomalous host response to infection. The pathogenesis of sepsis is complex, and immune dysfunction is the central link in its occurrence and development. The sepsis immune response is not a local and transient process but a complex and continuous process involving all major cell types of innate and adaptive immunity. B cells are traditionally studied for their ability to produce antibodies in the context of mediating humoral immunity. However, over the past few years, B cells have been increasingly recognized as key modulators of adaptive and innate immunity, and they can participate in immune responses by presenting antigens, producing cytokines, and modulating other immune cells. Recently, increasing evidence links B-cell dysfunction to mechanisms of immune derangement in sepsis, which has drawn attention to the powerful properties of this unique immune cell type in sepsis. Here, we reviewed the dynamic alterations of B cells and their novel roles in animal models and patients with sepsis, and provided new perspectives for therapeutic strategies targeting B cells in sepsis.
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Affiliation(s)
- Chengyong Ma
- Center of Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, China
- Department of Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Hanrui Liu
- Development and Related Diseases of Women and Children Key Laboratory of Sichuan Province, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Shuo Yang
- Center of Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Hong Li
- Center of Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Xuelian Liao
- Department of Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Yan Kang
- Department of Critical Care Medicine, West China Hospital, Sichuan University, Chengdu, China
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12
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Taylor MD, Fernandes TD, Yaipen O, Higgins CE, Capone CA, Leisman DE, Nedeljkovic-Kurepa A, Abraham MN, Brewer MR, Deutschman CS. T cell activation and IFNγ modulate organ dysfunction in LPS-mediated inflammation. J Leukoc Biol 2022; 112:221-232. [PMID: 35141943 PMCID: PMC9351424 DOI: 10.1002/jlb.4hi0921-492r] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 12/30/2021] [Accepted: 01/16/2022] [Indexed: 12/18/2022] Open
Abstract
LPS challenge is used to model inflammation-induced organ dysfunction. The effects of T cell activation on LPS-mediated organ dysfunction and immune responses are unknown. We studied these interactions through in vivo administration of anti-CD3ε (CD3) T cell activating antibody and LPS. Mortality in response to high-dose LPS (LPSHi; 600 μg) was 60%; similar mortality was observed with a 10-fold reduction in LPS dose (LPSLo; 60 μg) when administered with CD3 (CD3LPSLo). LPSHi and CD3LPSLo cohorts suffered severe organ dysfunction. CD3LPSLo led to increased IFNγ and IL12p70 produced by T cells and dendritic cells (cDCs) respectively. CD3LPSLo caused cDC expression of CD40 and MHCII and prevented PD1 expression in response to CD3. These interactions led to the generation of CD4 and CD8 cytolytic T cells. CD3LPSLo responded to IFNγ or IL12p40 blockade, in contrast to LPSHi. The combination of TCR activation and LPS (CD3LPSLo) dysregulated T cell activation and increased LPS-associated organ dysfunction and mortality through T cell and cDC interactions.
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Affiliation(s)
- Matthew D Taylor
- The Division of Critical Care Medicine, Department of Pediatrics, The Feinstein Institutes for Medical Research, Manhasset, New York, USA.,Department of Pediatrics, Cohen Children's Medical Center/Northwell Health, New Hyde Park, New York, USA
| | - Tiago D Fernandes
- The Division of Critical Care Medicine, Department of Pediatrics, The Feinstein Institutes for Medical Research, Manhasset, New York, USA.,Department of Pediatrics, Cohen Children's Medical Center/Northwell Health, New Hyde Park, New York, USA
| | - Omar Yaipen
- The Division of Critical Care Medicine, Department of Pediatrics, The Feinstein Institutes for Medical Research, Manhasset, New York, USA.,Department of Pediatrics, Cohen Children's Medical Center/Northwell Health, New Hyde Park, New York, USA
| | - Cassidy E Higgins
- The Division of Critical Care Medicine, Department of Pediatrics, The Feinstein Institutes for Medical Research, Manhasset, New York, USA.,Department of Pediatrics, Cohen Children's Medical Center/Northwell Health, New Hyde Park, New York, USA
| | - Christine A Capone
- The Division of Critical Care Medicine, Department of Pediatrics, The Feinstein Institutes for Medical Research, Manhasset, New York, USA.,Department of Pediatrics, Cohen Children's Medical Center/Northwell Health, New Hyde Park, New York, USA
| | - Daniel E Leisman
- Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Ana Nedeljkovic-Kurepa
- The Division of Critical Care Medicine, Department of Pediatrics, The Feinstein Institutes for Medical Research, Manhasset, New York, USA.,Department of Pediatrics, Cohen Children's Medical Center/Northwell Health, New Hyde Park, New York, USA
| | - Mabel N Abraham
- The Division of Critical Care Medicine, Department of Pediatrics, The Feinstein Institutes for Medical Research, Manhasset, New York, USA.,Department of Pediatrics, Cohen Children's Medical Center/Northwell Health, New Hyde Park, New York, USA
| | - Mariana R Brewer
- The Division of Critical Care Medicine, Department of Pediatrics, The Feinstein Institutes for Medical Research, Manhasset, New York, USA.,Department of Pediatrics, Cohen Children's Medical Center/Northwell Health, New Hyde Park, New York, USA
| | - Clifford S Deutschman
- The Division of Critical Care Medicine, Department of Pediatrics, The Feinstein Institutes for Medical Research, Manhasset, New York, USA.,Department of Pediatrics, Cohen Children's Medical Center/Northwell Health, New Hyde Park, New York, USA
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