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Chen KY, Liu SY, Tang JJ, Liu MK, Chen XY, Liu ZP, Ferrandon D, Lai KF, Li Z. NLRP3 knockout in mice provided protection against Serratia marcescens-induced acute pneumonia by decreasing PD-L1 and PD-1 expression in macrophages. Int Immunopharmacol 2024; 129:111559. [PMID: 38330794 DOI: 10.1016/j.intimp.2024.111559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 01/05/2024] [Accepted: 01/15/2024] [Indexed: 02/10/2024]
Abstract
Antibiotic-resistant Serratia marcescens (Sm) is known to cause bloodstream infections, pneumonia, etc. The nod-like receptor family, pyrin domain-containing 3 (NLRP3), has been implicated in various lung infections. Yet, its role in Sm-induced pneumonia was not well understood. In our study, we discovered that deletion of Nlrp3 in mice significantly improved Sm-induced survival rates, reduced bacterial loads in the lungs, bronchoalveolar lavage fluid (BALF), and bloodstream, and mitigated the severity of acute lung injury (ALI) compared to wild-type (WT) mice. Mechanistically, we observed that 24 h post-Sm infection, NLRP3 inflammasome activation occurred, leading to gasdermin D NH2-terminal (GSDMD-NT)-induced pyroptosis in macrophages and IL-1β secretion. The NLRP3 or NLRP3 inflammasome influenced the expression PD-L1 and PD-1, as well as the count of PD-L1 or PD-1-expressing macrophages, alveolar macrophages, interstitial macrophages, PD-L1-expressing neutrophils, and the count of macrophage receptors with collagenous structure (MARCO)-expressing macrophages, particularly MARCO+ alveolar macrophages. The frequency of MARCO+ alveolar macrophages, PD-1 expression, particularly PD-1+ interstitial macrophages were negatively or positively correlated with the Sm load, respectively. Additionally, IL-1β levels in BALF correlated with three features of acute lung injury: histologic score, protein concentration and neutrophil count in BALF. Consequently, our findings suggest that Nlrp3 deletion offers protection agaisnt acute Sm pneumonia in mice by inhibiting inflammasome activation and reducing Sm infection-induced PD-L1/PD-1 or MARCO expression, particularly in macrophages. This highlights potential therapeutic targets for Sm and other gram-negative bacteria-induced acute pneumonia.
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Affiliation(s)
- Kan-Yao Chen
- Sino-French Hoffmann Institute, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China; Department of Clinical Laboratory, Guangdong Provincial People's Hospital Zhuhai Hospital, Zhuhai, China
| | - Shu-Yan Liu
- Sino-French Hoffmann Institute, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China; Department of Clinical Laboratory, Guangzhou Twelfth People's Hospital, Guangzhou, China
| | - Juan-Juan Tang
- Sino-French Hoffmann Institute, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Meng-Ke Liu
- Sino-French Hoffmann Institute, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Xu-Yang Chen
- Sino-French Hoffmann Institute, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Zhi-Peng Liu
- Sino-French Hoffmann Institute, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Dominique Ferrandon
- Sino-French Hoffmann Institute, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China; State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, Guangzhou Medical University, Guangzhou, China; Université de Strasbourg, RIDI UPR9022 du CNRS, F-67000 Strasbourg, France
| | - Ke-Fang Lai
- State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, Guangzhou Medical University, Guangzhou, China.
| | - Zi Li
- Sino-French Hoffmann Institute, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China; State Key Laboratory of Respiratory Disease, Guangzhou Institute of Respiratory Health, Guangzhou Medical University, Guangzhou, China; The Second Affiliated Hospital of Guangzhou Medical University, Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, Guangzhou Medical University, Guangzhou, China.
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Chen Y, Guo DZ, Zhu CL, Ren SC, Sun CY, Wang Y, Wang JF. The implication of targeting PD-1:PD-L1 pathway in treating sepsis through immunostimulatory and anti-inflammatory pathways. Front Immunol 2023; 14:1323797. [PMID: 38193090 PMCID: PMC10773890 DOI: 10.3389/fimmu.2023.1323797] [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: 10/19/2023] [Accepted: 11/29/2023] [Indexed: 01/10/2024] Open
Abstract
Sepsis currently remains a major contributor to mortality in the intensive care unit (ICU), with 48.9 million cases reported globally and a mortality rate of 22.5% in 2017, accounting for almost 20% of all-cause mortality worldwide. This highlights the urgent need to improve the understanding and treatment of this condition. Sepsis is now recognized as a dysregulation of the host immune response to infection, characterized by an excessive inflammatory response and immune paralysis. This dysregulation leads to secondary infections, multiple organ dysfunction syndrome (MODS), and ultimately death. PD-L1, a co-inhibitory molecule expressed in immune cells, has emerged as a critical factor in sepsis. Numerous studies have found a significant association between the expression of PD-1/PD-L1 and sepsis, with a particular focus on PD-L1 expressed on neutrophils recently. This review explores the role of PD-1/PD-L1 in immunostimulatory and anti-inflammatory pathways, illustrates the intricate link between PD-1/PD-L1 and sepsis, and summarizes current therapeutic approaches against PD-1/PD-L1 in the treatment and prognosis of sepsis in preclinical and clinical studies.
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Affiliation(s)
- Yu Chen
- School of Basic Medicine, Naval Medical University, Shanghai, China
| | - De-zhi Guo
- School of Basic Medicine, Naval Medical University, Shanghai, China
| | - Cheng-long Zhu
- Faculty of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Shi-chun Ren
- Faculty of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Chen-yan Sun
- Faculty of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Yi Wang
- Faculty of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Jia-feng Wang
- Faculty of Anesthesiology, Changhai Hospital, Naval Medical University, Shanghai, China
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Giacalone VD, Giraldo DM, Silva GL, Hosten J, Peng L, Guglani L, Tirouvanziam R. Pulmonary exacerbations in early cystic fibrosis lung disease are marked by strong modulation of CD3 and PD-1 on luminal T cells. Front Immunol 2023; 14:1194253. [PMID: 37809107 PMCID: PMC10551126 DOI: 10.3389/fimmu.2023.1194253] [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: 03/26/2023] [Accepted: 09/05/2023] [Indexed: 10/10/2023] Open
Abstract
Background In chronic cystic fibrosis (CF) lung disease, neutrophilic inflammation and T-cell inhibition occur concomitantly, partly due to neutrophil-mediated release of the T-cell inhibitory enzyme Arg1. However, the onset of this tonic inhibition of T cells, and the impact of pulmonary exacerbations (PEs) on this process, remain unknown. Methods Children with CF aged 0-5 years were enrolled in a longitudinal, single-center cohort study. Blood (n = 35) and bronchoalveolar lavage (BAL) fluid (n = 18) were collected at stable outpatient clinic visits or inpatient PE hospitalizations and analyzed by flow cytometry (for immune cell presence and phenotype) and 20-plex chemiluminescence assay (for immune mediators). Patients were categorized by PE history into (i) no prior PE, (ii) past history of PE prior to stable visit, or (iii) current PE. Results PEs were associated with increased concentration of both pro- and anti-inflammatory mediators in BAL, and increased neutrophil frequency and G-CSF in circulation. PE BAL samples showed a trend toward an increased frequency of hyperexocytic "GRIM" neutrophils, which we previously identified in chronic CF. Interestingly, expression levels of the T-cell receptor associated molecule CD3 and of the inhibitory programmed death-1 (PD-1) receptor were respectively decreased and increased on T cells from BAL compared to blood in all patients. When categorized by PE status, CD3 and PD-1 expression on blood T cells did not differ among patients, while CD3 expression was decreased, and PD-1 expression was increased on BAL T cells from patients with current PE. Conclusions Our findings suggest that airway T cells are engaged during early-life PEs, prior to the onset of chronic neutrophilic inflammation in CF. In addition, increased blood neutrophil frequency and a trend toward increased BAL frequency of hyperexocytic neutrophils suggest that childhood PEs may progressively shift the balance of CF airway immunity towards neutrophil dominance.
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Affiliation(s)
- Vincent D. Giacalone
- Department of Pediatrics, Emory University, Atlanta, GA, United States
- Center for CF and Airways Disease Research, Children’s Healthcare of Atlanta, Atlanta, GA, United States
| | - Diego Moncada Giraldo
- Department of Pediatrics, Emory University, Atlanta, GA, United States
- Center for CF and Airways Disease Research, Children’s Healthcare of Atlanta, Atlanta, GA, United States
| | - George L. Silva
- Department of Pediatrics, Emory University, Atlanta, GA, United States
- Center for CF and Airways Disease Research, Children’s Healthcare of Atlanta, Atlanta, GA, United States
| | - Justin Hosten
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, United States
| | - Limin Peng
- Department of Biostatistics and Bioinformatics, Emory University School of Public Health, Atlanta, GA, United States
| | - Lokesh Guglani
- Department of Pediatrics, Emory University, Atlanta, GA, United States
- Center for CF and Airways Disease Research, Children’s Healthcare of Atlanta, Atlanta, GA, United States
| | - Rabindra Tirouvanziam
- Department of Pediatrics, Emory University, Atlanta, GA, United States
- Center for CF and Airways Disease Research, Children’s Healthcare of Atlanta, Atlanta, GA, United States
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, United States
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Slimmen LJM, Giacalone VD, Schofield C, Horati H, Manaï BHAN, Estevão SC, Garratt LW, Peng L, Tirouvanziam R, Janssens HM, Unger WWJ. Airway macrophages display decreased expression of receptors mediating and regulating scavenging in early cystic fibrosis lung disease. Front Immunol 2023; 14:1202009. [PMID: 37457715 PMCID: PMC10338875 DOI: 10.3389/fimmu.2023.1202009] [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: 04/07/2023] [Accepted: 06/05/2023] [Indexed: 07/18/2023] Open
Abstract
Background Cystic fibrosis (CF) airway disease is characterized by chronic inflammation, featuring neutrophil influx to the lumen. Airway macrophages (AMs) can promote both inflammation and resolution, and are thus critical to maintaining and restoring homeostasis. CF AM functions, specifically scavenging activity and resolution of inflammation, have been shown to be impaired, yet underlying processes remain unknown. We hypothesized that impaired CF AM function results from an altered expression of receptors that mediate or regulate scavenging, and set out to investigate changes in expression of these markers during the early stages of CF lung disease. Methods Bronchoalveolar lavage fluid (BALF) was collected from 50 children with CF aged 1, 3 or 5 years. BALF cells were analyzed using flow cytometry. Expression levels of surface markers on AMs were expressed as median fluorescence intensities (MFI) or percentage of AMs positive for these markers. The effect of age and neutrophilic inflammation, among other variables, on marker expression was assessed with a multivariate linear regression model. Results AM expression of scavenger receptor CD163 decreased with age (p = 0.016) and was negatively correlated with BALF %neutrophils (r = -0.34, p = 0.016). AM expression of immune checkpoint molecule SIRPα also decreased with age (p = 0.0006), but did not correlate with BALF %neutrophils. Percentage of AMs expressing lipid scavenger CD36 was low overall (mean 20.1% ± 16.5) and did not correlate with other factors. Conversely, expression of immune checkpoint PD-1 was observed on the majority of AMs (mean PD-1pos 72.9% ± 11.8), but it, too, was not affected by age or BALF %neutrophils. Compared to matched blood monocytes, AMs had a higher expression of CD16, CD91, and PD-1, and a lower expression of CD163, SIRPα and CD36. Conclusion In BALF of preschool children with CF, higher age and/or increased neutrophilic inflammation coincided with decreased expression of scavenger receptors on AMs. Expression of scavenging receptors and regulators showed a distinctly different pattern in AMs compared to blood monocytes. These findings suggest AM capacity to counter inflammation and promote homeostasis reduces during initiation of CF airway disease and highlight new avenues of investigation into impaired CF AM function.
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Affiliation(s)
- Lisa J. M. Slimmen
- Division of Respiratory Medicine and Allergology, Department of Pediatrics, Erasmus University Medical Centre, Rotterdam, Netherlands
- Laboratory of Pediatrics, Infection and Immunity Group, Department of Pediatrics, Erasmus University Medical Centre, Rotterdam, Netherlands
| | - Vincent D. Giacalone
- Department of Pediatrics, Emory University School of Medicine and Children’s Healthcare of Atlanta, Atlanta, GA, United States
| | - Craig Schofield
- Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| | - Hamed Horati
- Division of Respiratory Medicine and Allergology, Department of Pediatrics, Erasmus University Medical Centre, Rotterdam, Netherlands
| | - Badies H. A. N. Manaï
- Division of Respiratory Medicine and Allergology, Department of Pediatrics, Erasmus University Medical Centre, Rotterdam, Netherlands
| | - Silvia C. Estevão
- Laboratory of Pediatrics, Infection and Immunity Group, Department of Pediatrics, Erasmus University Medical Centre, Rotterdam, Netherlands
| | - Luke W. Garratt
- Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| | - Limin Peng
- Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, GA, United States
| | - Rabindra Tirouvanziam
- Department of Pediatrics, Emory University School of Medicine and Children’s Healthcare of Atlanta, Atlanta, GA, United States
| | - Hettie M. Janssens
- Division of Respiratory Medicine and Allergology, Department of Pediatrics, Erasmus University Medical Centre, Rotterdam, Netherlands
| | - Wendy W. J. Unger
- Laboratory of Pediatrics, Infection and Immunity Group, Department of Pediatrics, Erasmus University Medical Centre, Rotterdam, Netherlands
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Öz HH, Cheng EC, Di Pietro C, Tebaldi T, Biancon G, Zeiss C, Zhang PX, Huang PH, Esquibies SS, Britto CJ, Schupp JC, Murray TS, Halene S, Krause DS, Egan ME, Bruscia EM. Recruited monocytes/macrophages drive pulmonary neutrophilic inflammation and irreversible lung tissue remodeling in cystic fibrosis. Cell Rep 2022; 41:111797. [PMID: 36516754 PMCID: PMC9833830 DOI: 10.1016/j.celrep.2022.111797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 09/30/2022] [Accepted: 11/16/2022] [Indexed: 12/15/2022] Open
Abstract
Persistent neutrophil-dominated lung inflammation contributes to lung damage in cystic fibrosis (CF). However, the mechanisms that drive persistent lung neutrophilia and tissue deterioration in CF are not well characterized. Starting from the observation that, in patients with CF, c-c motif chemokine receptor 2 (CCR2)+ monocytes/macrophages are abundant in the lungs, we investigate the interplay between monocytes/macrophages and neutrophils in perpetuating lung tissue damage in CF. Here we show that CCR2+ monocytes in murine CF lungs drive pathogenic transforming growth factor β (TGF-β) signaling and sustain a pro-inflammatory environment by facilitating neutrophil recruitment. Targeting CCR2 to lower the numbers of monocytes in CF lungs ameliorates neutrophil inflammation and pathogenic TGF-β signaling and prevents lung tissue damage. This study identifies CCR2+ monocytes as a neglected contributor to the pathogenesis of CF lung disease and as a therapeutic target for patients with CF, for whom lung hyperinflammation and tissue damage remain an issue despite recent advances in CF transmembrane conductance regulator (CFTR)-specific therapeutic agents.
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Affiliation(s)
- Hasan H Öz
- Department of Pediatrics, Yale School of Medicine, New Haven, CT, USA
| | - Ee-Chun Cheng
- Department of Pediatrics, Yale School of Medicine, New Haven, CT, USA
| | | | - Toma Tebaldi
- Department of Hematology, Yale School of Medicine, New Haven, CT, USA; Yale Stem Cell Center, Yale School of Medicine, New Haven, CT, USA; Department of Cellular, Computational and Integrative Biology (CIBIO), University of Trento, 38123 Trento, Italy
| | - Giulia Biancon
- Department of Hematology, Yale School of Medicine, New Haven, CT, USA; Yale Stem Cell Center, Yale School of Medicine, New Haven, CT, USA
| | - Caroline Zeiss
- Department of Comparative Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Ping-Xia Zhang
- Department of Pediatrics, Yale School of Medicine, New Haven, CT, USA; Yale Stem Cell Center, Yale School of Medicine, New Haven, CT, USA; Department of Laboratory Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Pamela H Huang
- Department of Pediatrics, Yale School of Medicine, New Haven, CT, USA
| | - Sofia S Esquibies
- Department of Pediatrics, Yale School of Medicine, New Haven, CT, USA
| | - Clemente J Britto
- Department of Internal Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Jonas C Schupp
- Department of Pulmonary, Critical Care, and Sleep Medicine, Yale School of Medicine, New Haven, CT, USA; Department of Respiratory Medicine, Hannover Medical School and Biomedical Research in End-stage and Obstructive Lung Disease Hannover, German Lung Research Center (DZL), Hannover, Germany
| | - Thomas S Murray
- Department of Pediatrics, Yale School of Medicine, New Haven, CT, USA
| | - Stephanie Halene
- Department of Hematology, Yale School of Medicine, New Haven, CT, USA; Yale Stem Cell Center, Yale School of Medicine, New Haven, CT, USA
| | - Diane S Krause
- Yale Stem Cell Center, Yale School of Medicine, New Haven, CT, USA; Department of Laboratory Medicine, Yale School of Medicine, New Haven, CT, USA; Department of Pathology, Yale School of Medicine, New Haven, CT, USA
| | - Marie E Egan
- Department of Pediatrics, Yale School of Medicine, New Haven, CT, USA; Department of Cellular and Molecular Physiology, Yale School of Medicine, New Haven, CT, USA
| | - Emanuela M Bruscia
- Department of Pediatrics, Yale School of Medicine, New Haven, CT, USA; Yale Stem Cell Center, Yale School of Medicine, New Haven, CT, USA.
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Bengtson CD, Kim MD, Salathe M. Is CF airway inflammation still relevant in the era of highly effective modulators? J Cyst Fibros 2022; 21:901-903. [PMID: 36028422 DOI: 10.1016/j.jcf.2022.08.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- Charles D Bengtson
- Department of Internal Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - Michael D Kim
- Department of Internal Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - Matthias Salathe
- Department of Internal Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, University of Kansas Medical Center, Kansas City, KS 66160, USA.
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