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Siemińska I, Arent Z. What we know about alterations in immune cells during sepsis in veterinary animals? Vet Immunol Immunopathol 2024; 274:110804. [PMID: 39002363 DOI: 10.1016/j.vetimm.2024.110804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Revised: 06/30/2024] [Accepted: 07/02/2024] [Indexed: 07/15/2024]
Abstract
Sepsis is still one of the most common causes of death of animals and humans. It is marked by an aberrant immune response to infection, resulting in extensive inflammation, organ dysfunction, and, in severe instances, organ failure. Recognizable symptoms and markers of sepsis encompass substantial elevations in body temperature, respiratory rate, hemoglobin levels, and alterations in immune cell counts, including neutrophils, monocytes, and basophils, along with increases in certain acute-phase proteins. In contrast to human medicine, veterinarians must take into account some species differences. This article provides a comprehensive overview of changes in the immune system during sepsis, placing particular emphasis on species variations and exploring potential future drugs and interventions. Hence, understanding the intricate balance of the immune responses during sepsis is crucial to develop effective treatments and interventions to improve the chances of recovery in animals suffering from this serious condition.
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Affiliation(s)
- Izabela Siemińska
- Center of Experimental and Innovative Medicine, University Centre of Veterinary Medicine JU-UA, University of Agriculture in Krakow, Redzina 1C, Krakow 30-248, Poland.
| | - Zbigniew Arent
- Center of Experimental and Innovative Medicine, University Centre of Veterinary Medicine JU-UA, University of Agriculture in Krakow, Redzina 1C, Krakow 30-248, Poland
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2
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Landolina N, Ricci B, Veneziani I, Alicata C, Mariotti FR, Pelosi A, Quatrini L, Mortari EP, Carsetti R, Vacca P, Tumino N, Azzarone B, Moretta L, Maggi E. TLR2/4 are novel activating receptors for SARS-CoV-2 spike protein on NK cells. Front Immunol 2024; 15:1368946. [PMID: 38881905 PMCID: PMC11176535 DOI: 10.3389/fimmu.2024.1368946] [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: 01/11/2024] [Accepted: 05/03/2024] [Indexed: 06/18/2024] Open
Abstract
Background In early infected or severe coronavirus disease 2019 (COVID-19) patients, circulating NK cells are consistently reduced, despite being highly activated or exhausted. The aim of this paper was to establish whether severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike glycoprotein (SP) may directly trigger NK cells and through which receptor(s). Methods SP-stimulated human NK cells have been evaluated for the expression of activation markers, cytokine release, and cytotoxic activity, as well as for gene expression profiles and NF-kB phosphorylation, and they have been silenced with specific small interfering RNAs. Results SPs from the Wuhan strain and other variants of concern (VOCs) directly bind and stimulate purified NK cells by increasing activation marker expression, cytokine release, and cytolytic activity, prevalently in the CD56brightNK cell subset. VOC-SPs differ in their ability to activate NK cells, G614, and Delta-Plus strains providing the strongest activity in the majority of donors. While VOC-SPs do not trigger ACE2, which is not expressed on NK cells, or other activating receptors, they directly and variably bind to both Toll-like receptor 2 (TLR2) and TLR4. Moreover, SP-driven NK cell functions are inhibited upon masking such receptors or silencing the relative genes. Lastly, VOC-SPs upregulate CD56dimNK cell functions in COVID-19 recovered, but not in non-infected, individuals. Conclusions TLR2 and TLR4 are novel activating receptors for SP in NK cells, suggesting a new role of these cells in orchestrating the pathophysiology of SARS-CoV-2 infection. The pathogenic relevance of this finding is highlighted by the fact that free SP providing NK cell activation is frequently detected in a SARS-CoV-2 inflamed environment and in plasma of infected and long-COVID-19 subjects.
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Affiliation(s)
- Nadine Landolina
- Tumor Immunology Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Biancamaria Ricci
- Tumor Immunology Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Irene Veneziani
- Tumor Immunology Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Claudia Alicata
- Tumor Immunology Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | | | - Andrea Pelosi
- Tumor Immunology Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Linda Quatrini
- Innate Lymphoid Cells Unit, Immunology Research Area, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Eva Piano Mortari
- B cell Unit, Immunology Research Area, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Rita Carsetti
- B cell Unit, Immunology Research Area, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Paola Vacca
- Innate Lymphoid Cells Unit, Immunology Research Area, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Nicola Tumino
- Innate Lymphoid Cells Unit, Immunology Research Area, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Bruno Azzarone
- Tumor Immunology Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Lorenzo Moretta
- Tumor Immunology Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | - Enrico Maggi
- Tumor Immunology Unit, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
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3
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Santacroce E, D'Angerio M, Ciobanu AL, Masini L, Lo Tartaro D, Coloretti I, Busani S, Rubio I, Meschiari M, Franceschini E, Mussini C, Girardis M, Gibellini L, Cossarizza A, De Biasi S. Advances and Challenges in Sepsis Management: Modern Tools and Future Directions. Cells 2024; 13:439. [PMID: 38474403 DOI: 10.3390/cells13050439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 02/27/2024] [Accepted: 02/29/2024] [Indexed: 03/14/2024] Open
Abstract
Sepsis, a critical condition marked by systemic inflammation, profoundly impacts both innate and adaptive immunity, often resulting in lymphopenia. This immune alteration can spare regulatory T cells (Tregs) but significantly affects other lymphocyte subsets, leading to diminished effector functions, altered cytokine profiles, and metabolic changes. The complexity of sepsis stems not only from its pathophysiology but also from the heterogeneity of patient responses, posing significant challenges in developing universally effective therapies. This review emphasizes the importance of phenotyping in sepsis to enhance patient-specific diagnostic and therapeutic strategies. Phenotyping immune cells, which categorizes patients based on clinical and immunological characteristics, is pivotal for tailoring treatment approaches. Flow cytometry emerges as a crucial tool in this endeavor, offering rapid, low cost and detailed analysis of immune cell populations and their functional states. Indeed, this technology facilitates the understanding of immune dysfunctions in sepsis and contributes to the identification of novel biomarkers. Our review underscores the potential of integrating flow cytometry with omics data, machine learning and clinical observations to refine sepsis management, highlighting the shift towards personalized medicine in critical care. This approach could lead to more precise interventions, improving outcomes in this heterogeneously affected patient population.
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Affiliation(s)
- Elena Santacroce
- Department of Medical and Surgical Sciences for Children & Adults, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Miriam D'Angerio
- Department of Medical and Surgical Sciences for Children & Adults, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Alin Liviu Ciobanu
- Department of Medical and Surgical Sciences for Children & Adults, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Linda Masini
- Department of Medical and Surgical Sciences for Children & Adults, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Domenico Lo Tartaro
- Department of Medical and Surgical Sciences for Children & Adults, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Irene Coloretti
- Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, 41121 Modena, Italy
| | - Stefano Busani
- Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, 41121 Modena, Italy
| | - Ignacio Rubio
- Department of Anesthesiology and Intensive Care Medicine, Center for Sepsis Control and Care, Jena University Hospital, 07747 Jena, Germany
| | - Marianna Meschiari
- Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, 41121 Modena, Italy
| | - Erica Franceschini
- Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, 41121 Modena, Italy
| | - Cristina Mussini
- Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, 41121 Modena, Italy
| | - Massimo Girardis
- Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, 41121 Modena, Italy
| | - Lara Gibellini
- Department of Medical and Surgical Sciences for Children & Adults, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Andrea Cossarizza
- Department of Medical and Surgical Sciences for Children & Adults, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Sara De Biasi
- Department of Medical and Surgical Sciences for Children & Adults, University of Modena and Reggio Emilia, 41125 Modena, Italy
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Silva EE, Skon-Hegg C, Badovinac VP, Griffith TS. The Calm after the Storm: Implications of Sepsis Immunoparalysis on Host Immunity. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2023; 211:711-719. [PMID: 37603859 PMCID: PMC10449360 DOI: 10.4049/jimmunol.2300171] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 04/12/2023] [Indexed: 08/23/2023]
Abstract
The immunological hallmarks of sepsis include the inflammation-mediated cytokine storm, apoptosis-driven lymphopenia, and prolonged immunoparalysis. Although early clinical efforts were focused on increasing the survival of patients through the first phase, studies are now shifting attention to the long-term effects of sepsis on immune fitness in survivors. In particular, the most pertinent task is deciphering how the immune system becomes suppressed, leading to increased incidence of secondary infections. In this review, we introduce the contribution of numerical changes and functional reprogramming within innate (NK cells, dendritic cells) and adaptive (T cells, B cells) immune cells on the chronic immune dysregulation in the septic murine and human host. We briefly discuss how prior immunological experience in murine models impacts sepsis severity, immune dysfunction, and clinical relevance. Finally, we dive into how comorbidities, specifically autoimmunity and cancer, can influence host susceptibility to sepsis and the associated immune dysfunction.
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Affiliation(s)
- Elvia E Silva
- Department of Pathology, University of Iowa, Iowa City, IA
- Interdisciplinary Program in Immunology, University of Iowa, Iowa City, IA
| | - Cara Skon-Hegg
- Department of Urology, University of Minnesota, Minneapolis, MN
| | - Vladimir P Badovinac
- Department of Pathology, University of Iowa, Iowa City, IA
- Interdisciplinary Program in Immunology, University of Iowa, Iowa City, IA
| | - Thomas S Griffith
- Department of Urology, University of Minnesota, Minneapolis, MN
- Center for Immunology, University of Minnesota, Minneapolis, MN
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN
- Minneapolis VA Health Care System, Minneapolis, MN
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5
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Papaioannou S, See JX, Jeong M, De La Torre C, Ast V, Reiners-Koch PS, Sati A, Mogler C, Platten M, Cerwenka A, Stojanovic A. Liver sinusoidal endothelial cells orchestrate NK cell recruitment and activation in acute inflammatory liver injury. Cell Rep 2023; 42:112836. [PMID: 37471222 DOI: 10.1016/j.celrep.2023.112836] [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: 12/21/2022] [Revised: 05/30/2023] [Accepted: 07/05/2023] [Indexed: 07/22/2023] Open
Abstract
Liver sinusoidal endothelial cells (LSECs) rapidly clear lipopolysaccharide (LPS) from the bloodstream and establish intimate contact with immune cells. However, their role in regulating liver inflammation remains poorly understood. We show that LSECs modify their chemokine expression profile driven by LPS or interferon-γ (IFN-γ), resulting in the production of the myeloid- or lymphoid-attracting chemokines CCL2 and CXCL10, respectively, which accumulate in the serum of LPS-challenged animals. Natural killer (NK) cell exposure to LSECs in vitro primes NK cells for higher production of IFN-γ in response to interleukin-12 (IL-12) and IL-18. In livers of LPS-injected mice, NK cells are the major producers of this cytokine. In turn, LSECs require exposure to IFN-γ for CXCL10 expression, and endothelial-specific Cxcl10 gene deletion curtails NK cell accumulation in the inflamed livers. Thus, LSECs respond to both LPS and immune-derived signals and fuel a positive feedback loop of immune cell attraction and activation in the inflamed liver tissue.
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Affiliation(s)
- Sophia Papaioannou
- Department of Immunobiochemistry, Mannheim Institute for Innate Immunoscience (MI3), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; European Center for Angioscience (ECAS), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Jia-Xiang See
- Department of Immunobiochemistry, Mannheim Institute for Innate Immunoscience (MI3), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; European Center for Angioscience (ECAS), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Mingeum Jeong
- Department of Immunobiochemistry, Mannheim Institute for Innate Immunoscience (MI3), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Carolina De La Torre
- NGS Core Facility, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Volker Ast
- NGS Core Facility, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Institute for Clinical Chemistry, University Hospital Mannheim (UMM), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Philipp-Sebastian Reiners-Koch
- European Center for Angioscience (ECAS), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; Department of Dermatology, Venereology and Allergology, University Medical Center and Medical Faculty Mannheim, Heidelberg University, and Center of Excellence in Dermatology, Mannheim, Germany
| | - Ankita Sati
- CCU Neuroimmunology and Brain Tumor Immunology, German Cancer Research Center (DKFZ), German Cancer Consortium (DKTK), Clinical Cooperation Unit (CCU), Heidelberg, Germany
| | - Carolin Mogler
- Institute of Pathology, Technical University Munich, Munich, Germany
| | - Michael Platten
- CCU Neuroimmunology and Brain Tumor Immunology, German Cancer Research Center (DKFZ), German Cancer Consortium (DKTK), Clinical Cooperation Unit (CCU), Heidelberg, Germany; Department of Neurology, University Hospital Mannheim (UMM), MCTN, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; DKFZ Hector Cancer Institute at the University Medical Center Mannheim, Mannheim, Germany
| | - Adelheid Cerwenka
- Department of Immunobiochemistry, Mannheim Institute for Innate Immunoscience (MI3), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany; European Center for Angioscience (ECAS), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.
| | - Ana Stojanovic
- Department of Immunobiochemistry, Mannheim Institute for Innate Immunoscience (MI3), Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.
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Moris D, Henao R, Hensman H, Stempora L, Chasse S, Schobel S, Dente CJ, Kirk AD, Elster E. Multidimensional machine learning models predicting outcomes after trauma. Surgery 2022; 172:1851-1859. [PMID: 36116976 DOI: 10.1016/j.surg.2022.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 08/01/2022] [Accepted: 08/04/2022] [Indexed: 01/07/2023]
Abstract
BACKGROUND An emerging body of literature supports the role of individualized prognostic tools to guide the management of patients after trauma. The aim of this study was to develop advanced modeling tools from multidimensional data sources, including immunological analytes and clinical and administrative data, to predict outcomes in trauma patients. METHODS This was a prospective study of trauma patients at Level 1 centers from 2015 to 2019. Clinical, flow cytometry, and serum cytokine data were collected within 48 hours of admission. Sparse logistic regression models were developed, jointly selecting predictors and estimating the risk of ventilator-associated pneumonia, acute kidney injury, complicated disposition (death, rehabilitation, or nursing facility), and return to the operating room. Model parameters (regularization controlling model sparsity) and performance estimation were obtained via nested leave-one-out cross-validation. RESULTS A total of 179 patients were included. The incidences of ventilator-associated pneumonia, acute kidney injury, complicated disposition, and return to the operating room were 17.7%, 28.8%, 22.5%, and 12.3%, respectively. Regarding extensive resource use, 30.7% of patients had prolonged intensive care unit stay, 73.2% had prolonged length of stay, and 23.5% had need for prolonged ventilatory support. The models were developed and cross-validated for ventilator-associated pneumonia, acute kidney injury, complicated dispositions, and return to the operating room, yielding predictive areas under the curve from 0.70 to 0.91. Each model derived its optimal predictive value by combining clinical, administrative, and immunological analyte data. CONCLUSION Clinical, immunological, and administrative data can be combined to predict post-traumatic outcomes and resource use. Multidimensional machine learning modeling can identify trauma patients with complicated clinical trajectories and high resource needs.
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Affiliation(s)
| | | | - Hannah Hensman
- DecisionQ, Arlington, VA; Surgical Critical Care Initiative, Department of Surgery, Uniformed Services University of the Health Sciences; Bethesda, MD
| | - Linda Stempora
- Medical Center, Duke University Durham, NC; Surgical Critical Care Initiative, Department of Surgery, Uniformed Services University of the Health Sciences; Bethesda, MD
| | - Scott Chasse
- Medical Center, Duke University Durham, NC; Surgical Critical Care Initiative, Department of Surgery, Uniformed Services University of the Health Sciences; Bethesda, MD
| | - Seth Schobel
- Surgical Critical Care Initiative, Department of Surgery, Uniformed Services University of the Health Sciences; Bethesda, MD; Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc, Bethesda, MD
| | | | - Allan D Kirk
- Medical Center, Duke University Durham, NC; Surgical Critical Care Initiative, Department of Surgery, Uniformed Services University of the Health Sciences; Bethesda, MD
| | - Eric Elster
- Surgical Critical Care Initiative, Department of Surgery, Uniformed Services University of the Health Sciences; Bethesda, MD; Walter Reed National Military Medical Center, Bethesda, MD
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7
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Li J, Xu F, Li S, Xie M, Li N. Gentamicin promoted the production of CD4 +CD25 + Tregs via the STAT5 signaling pathway in mice sepsis. BMC Immunol 2022; 23:47. [PMID: 36162982 PMCID: PMC9513864 DOI: 10.1186/s12865-022-00521-4] [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: 11/10/2021] [Accepted: 09/12/2022] [Indexed: 11/10/2022] Open
Abstract
Background Increasing studies have reported that gentamicin (GNT) plays an essential role in sepsis; however, its underlying mechanism is still unclear. In this study, we investigated the mechanism of GNT in sepsis. Results We observed that GNT enhanced survival and alleviated inflammatory injuries of the lungs, liver, kidneys, and intestines in mice with sepsis. Furthermore, regulatory T cells (Tregs) showed enhanced inhibitory function, and pro-inflammatory cytokines IL-1β, TNF-α, and IL-2 and anti-inflammatory cytokine IL-10 showed decreased and increased peritoneal fluid levels, respectively, after treatment with GNT. GNT showed enhanced phosphorylation of signal transducer and activator of transcription 5 (p-STAT5) in Tregs in vivo and in vitro. The STAT5 inhibitor restrained the increased functional changes of Tregs and reduced inflammatory responses induced by GNT in vitro. Moreover, the STAT5 inhibitor reversed GNT-mediated impacts on survival and inflammation, and the percentage, apoptosis, and phenotypic and functional changes of Tregs in neonatal sepsis. Conclusions Our study revealed that GNT regulates the function of Tregs via the STAT5 signaling pathway, alleviating inflammatory injuries, and provides novel evidence in the treatment of neonatal sepsis. Supplementary Information The online version contains supplementary material available at 10.1186/s12865-022-00521-4.
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Affiliation(s)
- Jinfeng Li
- Department of Neonatology, Guangdong Medical University Affiliated Dongguan Children's Hospital, No. 68 Xi Hu Third Road, Shilong Town, Dongguan, 523325, Guangdong, China
| | - Fengdan Xu
- Department of Neonatology, Guangdong Medical University Affiliated Dongguan Children's Hospital, No. 68 Xi Hu Third Road, Shilong Town, Dongguan, 523325, Guangdong, China
| | - Song Li
- Department of Neonatology, Guangdong Medical University Affiliated Dongguan Children's Hospital, No. 68 Xi Hu Third Road, Shilong Town, Dongguan, 523325, Guangdong, China
| | - Mingyu Xie
- Department of Neonatology, Guangdong Medical University Affiliated Dongguan Children's Hospital, No. 68 Xi Hu Third Road, Shilong Town, Dongguan, 523325, Guangdong, China
| | - Ning Li
- Department of Neonatology, Guangdong Medical University Affiliated Dongguan Children's Hospital, No. 68 Xi Hu Third Road, Shilong Town, Dongguan, 523325, Guangdong, China.
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8
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Yao RQ, Ren C, Zheng LY, Xia ZF, Yao YM. Advances in Immune Monitoring Approaches for Sepsis-Induced Immunosuppression. Front Immunol 2022; 13:891024. [PMID: 35619710 PMCID: PMC9127053 DOI: 10.3389/fimmu.2022.891024] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 03/29/2022] [Indexed: 12/29/2022] Open
Abstract
Sepsis represents a life-threatening organ dysfunction due to an aberrant host response. Of note is that majority of patients have experienced a severe immune depression during and after sepsis, which is significantly correlated with the occurrence of nosocomial infection and higher risk of in-hospital death. Nevertheless, the clinical sign of sepsis-induced immune paralysis remains highly indetectable and ambiguous. Given that, specific yet robust biomarkers for monitoring the immune functional status of septic patients are of prominent significance in clinical practice. In turn, the stratification of a subgroup of septic patients with an immunosuppressive state will greatly contribute to the implementation of personalized adjuvant immunotherapy. In this review, we comprehensively summarize the mechanism of sepsis-associated immunosuppression at the cellular level and highlight the recent advances in immune monitoring approaches targeting the functional status of both innate and adaptive immune responses.
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Affiliation(s)
- Ren-Qi Yao
- Translational Medicine Research Center, Medical Innovation Research Division and Fourth Medical Center of the Chinese People's Liberation Army (PLA) General Hospital, Beijing, China.,Department of Burn Surgery, The First Affiliated Hospital of Naval Medical University, Shanghai, China
| | - Chao Ren
- Translational Medicine Research Center, Medical Innovation Research Division and Fourth Medical Center of the Chinese People's Liberation Army (PLA) General Hospital, Beijing, China.,Department of Pulmonary and Critical Care Medicine, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Li-Yu Zheng
- Translational Medicine Research Center, Medical Innovation Research Division and Fourth Medical Center of the Chinese People's Liberation Army (PLA) General Hospital, Beijing, China
| | - Zhao-Fan Xia
- Department of Burn Surgery, The First Affiliated Hospital of Naval Medical University, Shanghai, China
| | - Yong-Ming Yao
- Translational Medicine Research Center, Medical Innovation Research Division and Fourth Medical Center of the Chinese People's Liberation Army (PLA) General Hospital, Beijing, China
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9
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Westhaver LP, Nersesian S, Nelson A, MacLean LK, Carter EB, Rowter D, Wang J, Gala-Lopez BL, Stadnyk AW, Johnston B, Boudreau JE. Mitochondrial damage-associated molecular patterns trigger arginase-dependent lymphocyte immunoregulation. Cell Rep 2022; 39:110847. [PMID: 35613582 DOI: 10.1016/j.celrep.2022.110847] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 03/25/2022] [Accepted: 04/29/2022] [Indexed: 12/15/2022] Open
Abstract
Tissue damage leads to loss of cellular and mitochondrial membrane integrity and release of damage-associated molecular patterns, including those of mitochondrial origin (mitoDAMPs). Here, we describe the lymphocyte response to mitoDAMPs. Using primary cells from mice and human donors, we demonstrate that natural killer (NK) cells and T cells adopt regulatory phenotypes and functions in response to mitoDAMPs. NK cell-mediated cytotoxicity, interferon gamma (IFN-γ) production, T cell proliferation, and in vivo anti-viral T cell activation are all interrupted in the presence of mitoDAMPs or mitoDAMP-rich irradiated cells in in vitro and in vivo assays. Mass spectrometry analysis of mitoDAMPs demonstrates that arginase and products of its enzymatic activity are prevalent in mitoDAMP preparations. Functional validation by arginase inhibition and/or arginine add-back shows that arginine depletion is responsible for the alteration in immunologic polarity. We conclude that lymphocyte responses to mitoDAMPs reflect a highly conserved mechanism that regulates inflammation in response to tissue injury.
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Affiliation(s)
| | - Sarah Nersesian
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada; Beatrice Hunter Cancer Research Institute, Halifax, NS, Canada
| | - Adam Nelson
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada; Beatrice Hunter Cancer Research Institute, Halifax, NS, Canada
| | - Leah K MacLean
- Department of Pathology, Dalhousie University, Halifax, NS, Canada; Beatrice Hunter Cancer Research Institute, Halifax, NS, Canada
| | - Emily B Carter
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada; Beatrice Hunter Cancer Research Institute, Halifax, NS, Canada
| | - Derek Rowter
- CORES Facility, Dalhousie University, Halifax, NS, Canada
| | - Jun Wang
- Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada; Beatrice Hunter Cancer Research Institute, Halifax, NS, Canada; Department of Pediatrics, Dalhousie University, Halifax, NS, Canada; Canadian Center for Vaccinology, IWK Health Centre, Halifax, NS, Canada
| | - Boris L Gala-Lopez
- Department of Pathology, Dalhousie University, Halifax, NS, Canada; Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada; Department of Surgery, Dalhousie University, Halifax, NS, Canada
| | - Andrew W Stadnyk
- Department of Pathology, Dalhousie University, Halifax, NS, Canada; Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada; Beatrice Hunter Cancer Research Institute, Halifax, NS, Canada; Department of Pediatrics, Dalhousie University, Halifax, NS, Canada
| | - Brent Johnston
- Department of Pathology, Dalhousie University, Halifax, NS, Canada; Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada; Beatrice Hunter Cancer Research Institute, Halifax, NS, Canada
| | - Jeanette E Boudreau
- Department of Pathology, Dalhousie University, Halifax, NS, Canada; Department of Microbiology and Immunology, Dalhousie University, Halifax, NS, Canada; Beatrice Hunter Cancer Research Institute, Halifax, NS, Canada; Canadian Center for Vaccinology, IWK Health Centre, Halifax, NS, Canada.
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10
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Zheng Y, Liu B, Deng X, Chen Y, Huang Y, Zhang Y, Xu Y, Sang L, Liu X, Li Y. Construction and validation of a robust prognostic model based on immune features in sepsis. Front Immunol 2022; 13:994295. [PMID: 36532037 PMCID: PMC9756843 DOI: 10.3389/fimmu.2022.994295] [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: 07/14/2022] [Accepted: 11/11/2022] [Indexed: 12/05/2022] Open
Abstract
Purpose Sepsis, with life-threatening organ failure, is caused by the uncontrolled host response to infection. Immune response plays an important role in the pathophysiology of sepsis. Immune-related genes (IRGs) are promising novel biomarkers that have been used to construct the diagnostic and prognostic model. However, an IRG prognostic model used to predict the 28-day mortality in sepsis was still limited. Therefore, the study aimed to develop a prognostic model based on IRGs to identify patients with high risk and predict the 28-day mortality in sepsis. Then, we further explore the circulating immune cell and immunosuppression state in sepsis. Materials and methods The differentially expressed genes (DEGs), differentially expressed immune-related genes (DEIRGs), and differentially expressed transcription factors (DETFs) were obtained from the GEO, ImmPort, and Cistrome databases. Then, the TFs-DEIRGs regulatory network and prognostic prediction model were constructed by Cox regression analysis and Pearson correlation analysis. The external datasets also validated the reliability of the prognostic model. Based on the prognostic DEIRGs, we developed a nomogram and conducted an independent prognosis analysis to explore the relationship between DEIRGs in the prognostic model and clinical features in sepsis. Besides, we further evaluate the circulating immune cells state in sepsis. Results A total of seven datasets were included in our study. Among them, GSE65682 was identified as a discovery cohort. The results of GSEA showed that there is a significant correlation between sepsis and immune response. Then, based on a P value <0.01, 69 prognostic DEIRGs were obtained and the potential molecular mechanisms of DEIRGs were also clarified. According to multivariate Cox regression analysis, 22 DEIRGs were further identified to construct the prognostic model and identify patients with high risk. The Kaplan-Meier survival analysis showed that high-risk groups have higher 28-day mortality than low-risk groups (P=1.105e-13). The AUC value was 0.879 which symbolized that the prognostic model had a better accuracy to predict the 28-day mortality. The external datasets also prove that the prognostic model had an excellent prediction value. Furthermore, the results of correlation analysis showed that patients with Mars1 might have higher risk scores than Mars2-4 (P=0.002). According to the previous study, Mars1 endotype was characterized by immunoparalysis. Thus, the sepsis patients in high-risk groups might exist the immunosuppression. Between the high-risk and low-risk groups, circulating immune cells types were significantly different, and risk score was significantly negatively correlated with naive CD4+ T cells (P=0.019), activated NK cells (P=0.0045), monocytes (P=0.0134), and M1 macrophages (P=0.0002). Conclusions Our study provides a robust prognostic model based on 22 DEIRGs which can predict 28-day mortality and immunosuppression status in sepsis. The higher risk score was positively associated with 28-day mortality and the development of immunosuppression. IRGs are a promising biomarker that might facilitate personalized treatments for sepsis.
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Affiliation(s)
- Yongxin Zheng
- State Key Laboratory of Respiratory Diseases, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, Department of Critical Care Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Baiyun Liu
- State Key Laboratory of Respiratory Diseases, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, Department of Critical Care Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Xiumei Deng
- State Key Laboratory of Respiratory Diseases, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, Department of Critical Care Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Yubiao Chen
- State Key Laboratory of Respiratory Diseases, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, Department of Critical Care Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Yongbo Huang
- State Key Laboratory of Respiratory Diseases, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, Department of Critical Care Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Yu Zhang
- State Key Laboratory of Respiratory Diseases, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, Department of Critical Care Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Yonghao Xu
- State Key Laboratory of Respiratory Diseases, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, Department of Critical Care Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Ling Sang
- State Key Laboratory of Respiratory Diseases, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, Department of Critical Care Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Xiaoqing Liu
- State Key Laboratory of Respiratory Diseases, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, Department of Critical Care Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Yimin Li
- State Key Laboratory of Respiratory Diseases, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Health, Department of Critical Care Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- The First Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
- *Correspondence: Yimin Li,
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11
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Jensen IJ, Li X, McGonagill PW, Shan Q, Fosdick MG, Tremblay MM, Houtman JCD, Xue HH, Griffith TS, Peng W, Badovinac VP. Sepsis leads to lasting changes in phenotype and function of memory CD8 T cells. eLife 2021; 10:e70989. [PMID: 34652273 PMCID: PMC8589447 DOI: 10.7554/elife.70989] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 10/14/2021] [Indexed: 12/13/2022] Open
Abstract
The global health burden due to sepsis and the associated cytokine storm is substantial. While early intervention has improved survival during the cytokine storm, those that survive can enter a state of chronic immunoparalysis defined by transient lymphopenia and functional deficits of surviving cells. Memory CD8 T cells provide rapid cytolysis and cytokine production following re-encounter with their cognate antigen to promote long-term immunity, and CD8 T cell impairment due to sepsis can pre-dispose individuals to re-infection. While the acute influence of sepsis on memory CD8 T cells has been characterized, if and to what extent pre-existing memory CD8 T cells recover remains unknown. Here, we observed that central memory CD8 T cells (TCM) from septic patients proliferate more than those from healthy individuals. Utilizing LCMV immune mice and a CLP model to induce sepsis, we demonstrated that TCM proliferation is associated with numerical recovery of pathogen-specific memory CD8 T cells following sepsis-induced lymphopenia. This increased proliferation leads to changes in composition of memory CD8 T cell compartment and altered tissue localization. Further, memory CD8 T cells from sepsis survivors have an altered transcriptional profile and chromatin accessibility indicating long-lasting T cell intrinsic changes. The sepsis-induced changes in the composition of the memory CD8 T cell pool and transcriptional landscape culminated in altered T cell function and reduced capacity to control L. monocytogenes infection. Thus, sepsis leads to long-term alterations in memory CD8 T cell phenotype, protective function and localization potentially changing host capacity to respond to re-infection.
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Affiliation(s)
- Isaac J Jensen
- Department of Pathology, University of IowaIowa CityUnited States
| | - Xiang Li
- Department of Physics, The George Washington UniversityWashingtonUnited States
| | | | - Qiang Shan
- Center for Discovery and Innovation, Hackensack University Medical CenterNutleyUnited States
| | - Micaela G Fosdick
- Interdisciplinary Graduate Program in Molecular Medicine, University of IowaIowa CityUnited States
| | - Mikaela M Tremblay
- Interdisciplinary Graduate Program in Molecular Medicine, University of IowaIowa CityUnited States
| | - Jon CD Houtman
- Interdisciplinary Graduate Program in Molecular Medicine, University of IowaIowa CityUnited States
- Interdisciplinary Graduate Program in Molecular Medicine, University of IowaIowa CityUnited States
| | - Hai-Hui Xue
- Center for Discovery and Innovation, Hackensack University Medical CenterNutleyUnited States
| | - Thomas S Griffith
- Microbiology, Immunology, and Cancer Biology PhD Program, University of MinnesotaMinneapolisUnited States
- Department of Urology, University of MinnesotaMinneapolisUnited States
- Center for Immunology, University of MinnesotaMinneapolisUnited States
- Masonic Cancer Center, University of MinnesotaMinneapolisUnited States
- Minneapolis VA Health Care SystemMinneapolisUnited States
| | - Weiqun Peng
- Department of Physics, The George Washington UniversityWashingtonUnited States
| | - Vladimir P Badovinac
- Department of Pathology, University of IowaIowa CityUnited States
- Interdisciplinary Graduate Program in Molecular Medicine, University of IowaIowa CityUnited States
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12
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Dang Y, Souchet C, Moresi F, Jeljeli M, Raquillet B, Nicco C, Chouzenoux S, Lagoutte I, Marcellin L, Batteux F, Doridot L. BCG-trained innate immunity leads to fetal growth restriction by altering immune cell profile in the mouse developing placenta. J Leukoc Biol 2021; 111:1009-1020. [PMID: 34533228 DOI: 10.1002/jlb.4a0720-458rr] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Trained immunity is a new concept illustrating that innate immune cells are able to undergo a long-term metabolic and epigenetic reprogramming after infection or vaccination, thus displaying either a pro- or an anti-inflammatory phenotype during a sequential unrelated challenge. Innate immune cells such as natural killer (NK) cells and macrophages constitute a large part of the decidual leukocyte population at the maternal-fetal interface, playing an important role in placental development and as such in fetal growth and development. In this study, we hypothesized that training the innate immune cells before pregnancy could have an impact on pregnancy. To test this hypothesis, we used CBA/J x DBA/2 mouse model to investigate pregnancy outcomes and leukocyte population at the maternal-fetal interface. Although we were not able to show a beneficial effect of LPS-tolerogenic training on fetal resorption, Bacillus Calmette-Guérin (BCG) training, known to prime innate immune cells to be proinflammatory, led to fetal growth restriction, without aggravating the fetal resorption rate. We also found that BCG training led to less NK cells and macrophages at the maternal-fetal interface at the early stage of placentation (E9.5), associated with a down-regulation of Ccr3 and Lif mRNA expression. This induced altered leucocyte population profile can be an explanation for the subsequent fetal growth restriction. These data suggest that preconceptional infections-induced trained immunity could influence pregnancy outcomes.
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Affiliation(s)
- Yipu Dang
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 PARIS, France, Paris, France
| | - Camille Souchet
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 PARIS, France, Paris, France
| | - Fabiana Moresi
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 PARIS, France, Paris, France
| | - Mohamed Jeljeli
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 PARIS, France, Paris, France.,Service d'immunologie Biologique, AP-HP, Hôpital Universitaire Paris Centre, F-75014 Paris, France, Paris, France
| | - Bruno Raquillet
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 PARIS, France, Paris, France
| | - Carole Nicco
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 PARIS, France, Paris, France
| | - Sandrine Chouzenoux
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 PARIS, France, Paris, France
| | - Isabelle Lagoutte
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 PARIS, France, Paris, France
| | - Louis Marcellin
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 PARIS, France, Paris, France.,Département de Gynécologie Obstétrique II et Médecine de la Reproduction, AP-HP, Hôpital Universitaire Paris Centre, F-75014 Paris, France, Paris, France
| | - Frederic Batteux
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 PARIS, France, Paris, France.,Service d'immunologie Biologique, AP-HP, Hôpital Universitaire Paris Centre, F-75014 Paris, France, Paris, France
| | - Ludivine Doridot
- Université de Paris, Institut Cochin, INSERM, CNRS, F-75014 PARIS, France, Paris, France
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13
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Gelbard RB, Hensman H, Schobel S, Stempora LL, Moris D, Dente CJ, Buchman TG, Kirk AD, Elster E. An integrative model using flow cytometry identifies nosocomial infection after trauma. J Trauma Acute Care Surg 2021; 91:47-53. [PMID: 33660689 DOI: 10.1097/ta.0000000000003148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
BACKGROUND Flow cytometry (FCM) is a rapid diagnostic tool for monitoring immune cell function. We sought to determine if assessment of cell phenotypes using standardized FCM could be used to identify nosocomial infection after trauma. METHODS Prospective study of trauma patients at a Level I center from 2014 to 2018. Clinical and FCM data were collected within 24 hours of admission. Random forest (RF) models were developed to estimate the risk of severe sepsis (SS), organ space infection (OSI), and ventilator-associated pneumonia (VAP). Variables were selected using backward elimination and models were validated with leave-one-out. RESULTS One hundred and thirty-eight patients were included (median age, 30 years [23-44 years]; median Injury Severity Score, 20 (14-29); 76% (105/138) Black; 60% (83/138) gunshots). The incidence of SS was 8.7% (12/138), OSI 16.7% (23/138), and VAP 18% (25/138). The final RF SS model resulted in five variables (RBCs transfused in first 24 hours; absolute counts of CD56- CD16+ lymphocytes, CD4+ T cells, and CD56 bright natural killer [NK] cells; percentage of CD16+ CD56+ NK cells) that identified SS with an AUC of 0.89, sensitivity of 0.98, and specificity of 0.78. The final RF OSI model resulted in four variables (RBC in first 24 hours, shock index, absolute CD16+ CD56+ NK cell counts, percentage of CD56 bright NK cells) that identified OSI with an AUC of 0.76, sensitivity of 0.68, and specificity of 0.82. The RF VAP model resulted in six variables (Sequential [Sepsis-related] Organ Failure Assessment score: Injury Severity Score; CD4- CD8- T cell counts; percentages of CD16- CD56- NK cells, CD16- CD56+ NK cells, and CD19+ B lymphocytes) that identified VAP with AUC of 0.86, sensitivity of 0.86, and specificity of 0.83. CONCLUSIONS Combined clinical and FCM data can assist with early identification of posttraumatic infections. The presence of NK cells supports the innate immune response that occurs during acute inflammation. Further research is needed to determine the functional role of these innate cell phenotypes and their value in predictive models immediately after injury. LEVEL OF EVIDENCE Prognostic, level III.
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Affiliation(s)
- Rondi B Gelbard
- From the Emory University (R.B.G., C.J.D., T.B.), Atlanta, Georgia; Uniformed Services University of the Health Sciences (S.S., E.E.); Walter Reed National Military Medical Center (E.E.); Surgical Critical Care Initiative (SC2i) (R.B.G., H.H., S.S., L.S., C.J.D., T.B., A.K., E.E.), Bethesda, Maryland; DecisionQ (H.H.), Arlington, VA; Duke University (L.S., D.M., A.K.), Durham, North Carolina; and University of Alabama at Birmingham (R.B.G.), Birmingham, Alabama
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14
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Brook B, Harbeson DJ, Shannon CP, Cai B, He D, Ben-Othman R, Francis F, Huang J, Varankovich N, Liu A, Bao W, Bjerregaard-Andersen M, Schaltz-Buchholzer F, Sanca L, Golding CN, Larsen KL, Levy O, Kampmann B, Tan R, Charles A, Wynn JL, Shann F, Aaby P, Benn CS, Tebbutt SJ, Kollmann TR, Amenyogbe N. BCG vaccination-induced emergency granulopoiesis provides rapid protection from neonatal sepsis. Sci Transl Med 2021; 12:12/542/eaax4517. [PMID: 32376769 DOI: 10.1126/scitranslmed.aax4517] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 03/13/2020] [Accepted: 04/16/2020] [Indexed: 12/11/2022]
Abstract
Death from sepsis in the neonatal period remains a serious threat for millions. Within 3 days of administration, bacille Calmette-Guérin (BCG) vaccination can reduce mortality from neonatal sepsis in human newborns, but the underlying mechanism for this rapid protection is unknown. We found that BCG was also protective in a mouse model of neonatal polymicrobial sepsis, where it induced granulocyte colony-stimulating factor (G-CSF) within hours of administration. This was necessary and sufficient to drive emergency granulopoiesis (EG), resulting in a marked increase in neutrophils. This increase in neutrophils was directly and quantitatively responsible for protection from sepsis. Rapid induction of EG after BCG administration also occurred in three independent cohorts of human neonates.
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Affiliation(s)
- Byron Brook
- Department of Experimental Medicine, University of British Columbia, 2775 Laurel Street, 10th Floor, Room 10117, Vancouver, BC V5Z 1M9, Canada
| | - Danny J Harbeson
- Department of Experimental Medicine, University of British Columbia, 2775 Laurel Street, 10th Floor, Room 10117, Vancouver, BC V5Z 1M9, Canada
| | - Casey P Shannon
- PROOF Centre of Excellence, British Columbia, 10th floor, 1190 Hornby Street, Vancouver, BC V6Z 2K5, Canada.,UBC Centre for Heart Lung Innovation, St. Paul's Hospital, 1081 Burrard Street, Vancouver, BC V6Z 1Y6, Canada
| | - Bing Cai
- Department of Pediatrics, University of British Columbia, and BC Children's Hospital, 4480 Oak Street, Vancouver, BC V6H 3V4, Canada
| | - Daniel He
- Department of Experimental Medicine, University of British Columbia, 2775 Laurel Street, 10th Floor, Room 10117, Vancouver, BC V5Z 1M9, Canada.,PROOF Centre of Excellence, British Columbia, 10th floor, 1190 Hornby Street, Vancouver, BC V6Z 2K5, Canada.,UBC Centre for Heart Lung Innovation, St. Paul's Hospital, 1081 Burrard Street, Vancouver, BC V6Z 1Y6, Canada
| | - Rym Ben-Othman
- Department of Pediatrics, University of British Columbia, and BC Children's Hospital, 4480 Oak Street, Vancouver, BC V6H 3V4, Canada
| | - Freddy Francis
- Department of Experimental Medicine, University of British Columbia, 2775 Laurel Street, 10th Floor, Room 10117, Vancouver, BC V5Z 1M9, Canada
| | - Joe Huang
- Department of Pediatrics, University of British Columbia, and BC Children's Hospital, 4480 Oak Street, Vancouver, BC V6H 3V4, Canada
| | - Natallia Varankovich
- Department of Pediatrics, University of British Columbia, and BC Children's Hospital, 4480 Oak Street, Vancouver, BC V6H 3V4, Canada
| | - Aaron Liu
- Department of Experimental Medicine, University of British Columbia, 2775 Laurel Street, 10th Floor, Room 10117, Vancouver, BC V5Z 1M9, Canada
| | - Winnie Bao
- Department of Pediatrics, University of British Columbia, and BC Children's Hospital, 4480 Oak Street, Vancouver, BC V6H 3V4, Canada
| | - Morten Bjerregaard-Andersen
- Bandim Health Project, Indepth Network, Apartado 861, 1004 Bissau, Guinea-Bissau.,Research Center for Vitamins and Vaccines (CVIVA), Statens Serum Institut (SSI), Artillerivej 5, 2300 Copenhagen S, Denmark.,Department of Endocrinology, Odense University Hospital, Kløvervænget 6, 5000 Odense C, Denmark
| | - Frederik Schaltz-Buchholzer
- Bandim Health Project, Indepth Network, Apartado 861, 1004 Bissau, Guinea-Bissau.,Research Center for Vitamins and Vaccines (CVIVA), Statens Serum Institut (SSI), Artillerivej 5, 2300 Copenhagen S, Denmark.,OPEN, Institute of Clinical Research and Danish Institute for Advanced Science, University of Southern Denmark, and Odense University Hospital, J.B. Winsløws Vej, 5000 Odense C, Denmark
| | - Lilica Sanca
- Bandim Health Project, Indepth Network, Apartado 861, 1004 Bissau, Guinea-Bissau
| | - Christian N Golding
- Bandim Health Project, Indepth Network, Apartado 861, 1004 Bissau, Guinea-Bissau.,Research Center for Vitamins and Vaccines (CVIVA), Statens Serum Institut (SSI), Artillerivej 5, 2300 Copenhagen S, Denmark
| | - Kristina Lindberg Larsen
- Bandim Health Project, Indepth Network, Apartado 861, 1004 Bissau, Guinea-Bissau.,Research Center for Vitamins and Vaccines (CVIVA), Statens Serum Institut (SSI), Artillerivej 5, 2300 Copenhagen S, Denmark
| | - Ofer Levy
- Precision Vaccines Program, Boston Children's Hospital, Boston, MA 02115, USA.,Harvard Medical School, Boston, MA 02115, USA.,Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Beate Kampmann
- Vaccines and Immunity Theme, Medical Research Council Unit, The Gambia at the London School of Hygiene and Tropical Medicine, Atlantic Boulevard, P.O. Box 273, Banjul, The Gambia.,Vaccine Centre, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London WC1E 7HT, UK
| | | | - Rusung Tan
- Department of Pathology, Sidra Medicine and Weill Cornell Medicine, Doha, Qatar
| | - Adrian Charles
- Department of Pathology, Sidra Medicine and Weill Cornell Medicine, Doha, Qatar
| | - James L Wynn
- Department of Paediatrics and Department of Pathology, Immunology, and Laboratory Medicine, University of Florida, P.O. Box 100296, Gainesville, FL 32610-0296, USA
| | - Frank Shann
- Department of Paediatrics, University of Melbourne, Melbourne, VIC 3052, Australia
| | - Peter Aaby
- Bandim Health Project, Indepth Network, Apartado 861, 1004 Bissau, Guinea-Bissau
| | - Christine S Benn
- Bandim Health Project, Indepth Network, Apartado 861, 1004 Bissau, Guinea-Bissau.,Research Center for Vitamins and Vaccines (CVIVA), Statens Serum Institut (SSI), Artillerivej 5, 2300 Copenhagen S, Denmark.,OPEN, Institute of Clinical Research and Danish Institute for Advanced Science, University of Southern Denmark, and Odense University Hospital, J.B. Winsløws Vej, 5000 Odense C, Denmark
| | - Scott J Tebbutt
- PROOF Centre of Excellence, British Columbia, 10th floor, 1190 Hornby Street, Vancouver, BC V6Z 2K5, Canada.,UBC Centre for Heart Lung Innovation, St. Paul's Hospital, 1081 Burrard Street, Vancouver, BC V6Z 1Y6, Canada.,Department of Medicine, Division of Respiratory Medicine, University of British Columbia, Vancouver, BC V5Z 1M9, Canada
| | - Tobias R Kollmann
- Department of Experimental Medicine, University of British Columbia, 2775 Laurel Street, 10th Floor, Room 10117, Vancouver, BC V5Z 1M9, Canada. .,Department of Pediatrics, University of British Columbia, and BC Children's Hospital, 4480 Oak Street, Vancouver, BC V6H 3V4, Canada.,Telethon Kids Institute, 100 Roberts Road, Subiaco, Western Australia 6008, Australia
| | - Nelly Amenyogbe
- Department of Experimental Medicine, University of British Columbia, 2775 Laurel Street, 10th Floor, Room 10117, Vancouver, BC V5Z 1M9, Canada. .,Telethon Kids Institute, 100 Roberts Road, Subiaco, Western Australia 6008, Australia
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15
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Jiang W, Li X, Wen M, Liu X, Wang K, Wang Q, Li Y, Zhou M, Liu M, Hu B, Zeng H. Increased percentage of PD-L1 + natural killer cells predicts poor prognosis in sepsis patients: a prospective observational cohort study. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2020; 24:617. [PMID: 33076951 PMCID: PMC7574346 DOI: 10.1186/s13054-020-03329-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 10/05/2020] [Indexed: 12/20/2022]
Abstract
Background Natural killer (NK) cells play a major role in immune tolerance after sepsis, and the programmed cell death 1 (PD-1) and programmed cell death ligand 1 (PD-L1) system mediates evasion of host immunity. The correlation between PD-L1 levels in NK cells and the prognosis of patients with sepsis, however, has not been elucidated. Thus, it was hypothesized that PD-L1 in NK cells could be a novel biomarker of the mortality for sepsis patients. Methods A prospective, observational, cohort study in a general intensive care unit had earlier enrolled patients according to the sepsis-3 criteria, and peripheral blood samples were collected within 24 h post-recruitment. The expression of four co-signaling molecules (PD-1, CD28, PD-L1, and CD86) in NK cells was assayed, and the sequential organ failure assessment (SOFA) scores were recorded on day 1. Patients were followed up until 28 days. Multivariate regression analysis assessed the independent risk factors for 28-day mortality. The association between biomarkers and 28-day mortality was assessed by Cox regression survival analysis. The accuracy of biomarkers for mortality was determined by the area under the receiver operating characteristic (ROC) curve (AUC) analysis. Results A total of 269 patients were recruited, and 114 patients were finally included for final analysis. Of these, 30 (26.3%) patients died during 28 days. The percentage of PD-L1+ NK cells (OR 1.022; 95% CI 1.002–1.043) and SOFA scores (OR 1.247; 95% CI 1.092–1.424) were independent risk factors for 28-day mortality. The AUC of the percentage of PD-L1+ NK cells, SOFA scores, and their combination model were 0.655 (0.559–0.742), 0.727 (0.635–0.807) and 0.808 (0.723–0.876), respectively. The combination model was the indicator with the best AUC to predict mortality in 28 days (all p < 0.05). Patients with the percentage of PD-L1+ NK cells above the cutoff point 5.58% (hazard ratio (HR) 10.128 (1.372–74.772), p = 0.001), and the combination model prediction possibility above 0.1241 (HR 13.730 (3.241–58.158), p < 0.001) were the indexes that had greater discriminative capacity to predict 28 days mortality. Conclusions The percentage of PD-L1+ NK cells at admission serves as a novel prognostic biomarker for predicting mortality and contributes to improve the predictive capacity of SOFA score in patients with sepsis.
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Affiliation(s)
- Wenqiang Jiang
- Department of Emergency and Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou, 510080, Guangdong, China
| | - Xusheng Li
- Department of Emergency and Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou, 510080, Guangdong, China
| | - Miaoyun Wen
- Department of Emergency and Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou, 510080, Guangdong, China
| | - Xiaoyu Liu
- Department of Emergency and Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou, 510080, Guangdong, China.,The Second School of Clinical Medicine, Southern Medical University, 1063 Shatai Nan road, Guangzhou, 510515, China
| | - Kangrong Wang
- Department of Emergency and Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou, 510080, Guangdong, China.,The Second School of Clinical Medicine, Southern Medical University, 1063 Shatai Nan road, Guangzhou, 510515, China
| | - Qiaosheng Wang
- Department of Critical Care Medicine, The First Affiliated Hospital, University of South China, No. 69, Chuanshan Road, Hengyang, 421001, Hunan, China
| | - Ya Li
- Department of Emergency and Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou, 510080, Guangdong, China.,School of Medicine, South China University of Technology, Guangzhou, 510006, China
| | - Maohua Zhou
- Division of Laboratory, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou, 510080, Guangdong, China
| | - Mengting Liu
- Department of Emergency and Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou, 510080, Guangdong, China.,School of Medicine, South China University of Technology, Guangzhou, 510006, China
| | - Bei Hu
- Department of Emergency and Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou, 510080, Guangdong, China.
| | - Hongke Zeng
- Department of Emergency and Critical Care Medicine, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, 106 Zhongshan Er Road, Guangzhou, 510080, Guangdong, China.
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16
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Rasid O, Chevalier C, Camarasa TMN, Fitting C, Cavaillon JM, Hamon MA. H3K4me1 Supports Memory-like NK Cells Induced by Systemic Inflammation. Cell Rep 2020; 29:3933-3945.e3. [PMID: 31851924 DOI: 10.1016/j.celrep.2019.11.043] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 09/06/2019] [Accepted: 11/08/2019] [Indexed: 12/24/2022] Open
Abstract
Natural killer (NK) cells are unique players in innate immunity and, as such, an attractive target for immunotherapy. NK cells display immune memory properties in certain models, but the long-term status of NK cells following systemic inflammation is unknown. Here we show that following LPS-induced endotoxemia in mice, NK cells acquire cell-intrinsic memory-like properties, showing increased production of IFNγ upon specific secondary stimulation. The NK cell memory response is detectable for at least 9 weeks and contributes to protection from E. coli infection upon adoptive transfer. Importantly, we reveal a mechanism essential for NK cell memory, whereby an H3K4me1-marked latent enhancer is uncovered at the ifng locus. Chemical inhibition of histone methyltransferase activity erases the enhancer and abolishes NK cell memory. Thus, NK cell memory develops after endotoxemia in a histone methylation-dependent manner, ensuring a heightened response to secondary stimulation.
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Affiliation(s)
- Orhan Rasid
- G5 Chromatine et Infection, Institut Pasteur, Paris, France; Unité Cytokines & Inflammation, Institut Pasteur, Paris, France.
| | | | - Tiphaine Marie-Noelle Camarasa
- G5 Chromatine et Infection, Institut Pasteur, Paris, France; Université Paris Diderot, Sorbonne Paris Cité, Paris, France
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17
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Abstract
Immunosuppression is the most commonly used concept to qualify the immune status of patients with either sterile systemic inflammatory response syndrome (SIRS) or sepsis. In this review we attempt to demonstrate that the concept of immunosuppression is an oversimplification of the complex anti-inflammatory response that occurs in patients dealing with a severe sterile or infectious insult. Particularly, the immune status of leukocytes varies greatly depending on the compartment from where they are derived from. Furthermore, although certain functions of immune cells present in the blood stream or in the hematopoietic organs can be significantly diminished, other functions are either unchanged or even enhanced. This juxtaposition illustrates that there is no global defect. The mechanisms called reprogramming or trained innate immunity are probably aimed at preventing a generalized deleterious inflammatory reaction, and work to maintain the defense mechanisms at their due levels.
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18
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Jin C, Wang A, Liu L, Wang G, Li G, Han Z. miR-145-5p inhibits tumor occurrence and metastasis through the NF-κB signaling pathway by targeting TLR4 in malignant melanoma. J Cell Biochem 2019; 120:11115-11126. [PMID: 30701576 DOI: 10.1002/jcb.28388] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 12/26/2018] [Accepted: 01/09/2019] [Indexed: 01/24/2023]
Abstract
Compelling evidence shows that deregulated microRNAs (miRNAs) are important regulators in the progression of melanoma. miR-145-5p has been suggested to exhibit antitumorigenic activity in melanoma. However, the molecular mechanism underlying the biological activity of miR-145-5p in melanoma remains to be further understood. Herein, quantitative real-time polymerase chain reaction was used to examine the miR-145-5p expression in malignant melanoma tissues and cells. The interaction between miR-145-5p and toll-like receptor 4 (TLR4) was explored by bioinformatics analyses, luciferase reporter assay, and Western blot. The effects of miR-145-5p or combined with TLR4 on cell proliferation, colony formation, migration, and invasion abilities were investigated by (4,5-Dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide, colony formation, wound healing, and transwell assays, respectively. The melanoma xenograft tumor models were established to determine the biological activity of miR-145-5p in melanoma in vivo. In addition, the changes of the nuclear factor kappa B (NF-κB) pathway were analyzed by detecting the NF-κB activity and the NF-κB p65 protein level. We observed that the miR-145-5p expression was underexpressed in melanoma tissues and cells. miR-145-5p suppressed the TLR4 expression by binding to its 3'untranslated region in melanoma cells. Moreover, TLR4 overexpression abolished the inhibition of cell proliferation, colony formation, migration, and invasion abilities induced by miR-145-5p in melanoma cells. Meanwhile, miR-145-5p was confirmed to restrain melanoma tumor growth in vivo by targeting TLR4. Furthermore, miR-145-5p overexpression inactivated the NF-κB pathway in melanoma in vitro and in vivo, which was reversed by TLR4 overexpression. We concluded that miR-145-5p hindered the occurrence and metastasis of melanoma cells in vitro and in vivo by targeting TLR4 via inactivation of the NF-κB pathway.
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Affiliation(s)
- Canhui Jin
- Department of Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Aihong Wang
- Department of Gynecologic Oncology, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, Henan, China
| | - Linbo Liu
- Department of Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Gongping Wang
- Department of Gastrointestinal Tumor Surgery, The First Affiliated Hospital, and College of Clinical Medicine of Henan University of Science and Technology, Luoyang, Henan, China
| | - Guangshuai Li
- Department of Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - Zhaofeng Han
- Department of Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
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19
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Kumar V. Natural killer cells in sepsis: Underprivileged innate immune cells. Eur J Cell Biol 2019; 98:81-93. [DOI: 10.1016/j.ejcb.2018.12.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 12/15/2018] [Accepted: 12/17/2018] [Indexed: 02/06/2023] Open
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20
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Patra MC, Shah M, Choi S. Toll-like receptor-induced cytokines as immunotherapeutic targets in cancers and autoimmune diseases. Semin Cancer Biol 2019; 64:61-82. [PMID: 31054927 DOI: 10.1016/j.semcancer.2019.05.002] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2019] [Revised: 04/27/2019] [Accepted: 05/01/2019] [Indexed: 12/14/2022]
Abstract
Immune cells of the myeloid and lymphoid lineages express Toll-like receptors (TLRs) to recognize pathogenic components or cellular debris and activate the immune system through the secretion of cytokines. Cytokines are signaling molecules that are structurally and functionally distinct from one another, although their secretion profiles and signaling cascades often overlap. This situation gives rise to pleiotropic cell-to-cell communication pathways essential for protection from infections as well as cancers. Nonetheless, deregulated signaling can have detrimental effects on the host, in the form of inflammatory or autoimmune diseases. Because cytokines are associated with numerous autoimmune and cancerous conditions, therapeutic strategies to modulate these molecules or their biological responses have been immensely beneficial over the years. There are still challenges in the regulation of cytokine function in patients, even in those who take approved biological therapeutics. In this review, our purpose is to discuss the differential expression patterns of TLR-regulated cytokines and their cell type specificity that is associated with cancers and immune-system-related diseases. In addition, we highlight key structural features and molecular recognition of cytokines by receptors; these data have facilitated the development and approval of several biologics for the treatment of autoimmune diseases and cancers.
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Affiliation(s)
- Mahesh Chandra Patra
- Department of Molecular Science and Technology, Ajou University, Suwon, 16499, Republic of Korea
| | - Masaud Shah
- Department of Molecular Science and Technology, Ajou University, Suwon, 16499, Republic of Korea
| | - Sangdun Choi
- Department of Molecular Science and Technology, Ajou University, Suwon, 16499, Republic of Korea.
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21
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Jensen IJ, Winborn CS, Fosdick MG, Shao P, Tremblay MM, Shan Q, Tripathy SK, Snyder CM, Xue HH, Griffith TS, Houtman JC, Badovinac VP. Polymicrobial sepsis influences NK-cell-mediated immunity by diminishing NK-cell-intrinsic receptor-mediated effector responses to viral ligands or infections. PLoS Pathog 2018; 14:e1007405. [PMID: 30379932 PMCID: PMC6231673 DOI: 10.1371/journal.ppat.1007405] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 11/12/2018] [Accepted: 10/13/2018] [Indexed: 12/14/2022] Open
Abstract
The sepsis-induced cytokine storm leads to severe lymphopenia and reduced effector capacity of remaining/surviving cells. This results in a prolonged state of immunoparalysis, that contributes to enhanced morbidity/mortality of sepsis survivors upon secondary infection. The impact of sepsis on several lymphoid subsets has been characterized, yet its impact on NK-cells remains underappreciated–despite their critical role in controlling infection(s). Here, we observed numerical loss of NK-cells in multiple tissues after cecal-ligation-and-puncture (CLP)-induced sepsis. To elucidate the sepsis-induced lesions in surviving NK-cells, transcriptional profiles were evaluated and indicated changes consistent with impaired effector functionality. A corresponding deficit in NK-cell capacity to produce effector molecules following secondary infection and/or cytokine stimulation (IL-12,IL-18) further suggested a sepsis-induced NK-cell intrinsic impairment. To specifically probe NK-cell receptor-mediated function, the activating Ly49H receptor, that recognizes the murine cytomegalovirus (MCMV) m157 protein, served as a model receptor. Although relative expression of Ly49H receptor did not change, the number of Ly49H+ NK-cells in CLP hosts was reduced leading to impaired in vivo cytotoxicity and the capacity of NK-cells (on per-cell basis) to perform Ly49H-mediated degranulation, killing, and effector molecule production in vitro was also severely reduced. Mechanistically, Ly49H adaptor protein (DAP12) activation and clustering, assessed by TIRF microscopy, was compromised. This was further associated with diminished AKT phosphorylation and capacity to flux calcium following receptor stimulation. Importantly, DAP12 overexpression in NK-cells restored Ly49H/D receptors-mediated effector functions in CLP hosts. Finally, as a consequence of sepsis-dependent numerical and functional lesions in Ly49H+ NK-cells, host capacity to control MCMV infection was significantly impaired. Importantly, IL-2 complex (IL-2c) therapy after CLP improved numbers but not a function of NK-cells leading to enhanced immunity to MCMV challenge. Thus, the sepsis-induced immunoparalysis state includes numerical and NK-cell-intrinsic functional impairments, an instructive notion for future studies aimed in restoring NK-cell immunity in sepsis survivors. Sepsis is an exaggerated host response to infection that can initially lead to significant morbidity/mortality and a long-lasting state of immunoparalysis in sepsis survivors. Sepsis-induced immunoparalysis functionally impairs numerous lymphocyte populations, including NK-cells. However, the scope and underlying mechanisms of NK-cell impairment and the consequences for NK-cell-mediated pathogen control remain underappreciated. NK-cells contribute to early host control of pathogens through a balance of activating and inhibitory receptors, and alterations in the number and capacity of NK-cells to exert receptor-mediated immunity can lead to dramatic impairment in host control of infection. The present study defines sepsis-induced numerical and cell-intrinsic functional impairments in NK-cell response to cytokine stimulation and receptor signaling that contribute to impaired host capacity to mount NK-cell-mediated effector responses and provide protection to bacterial and/or viral pathogens. Impairments in receptor signaling were due to reduced expression of adaptor protein DAP12. Importantly, the diminished ability of NK-cells from CLP hosts to provide anti-viral (MCMV) immunity is partially restored by IL-2 complex (IL-2c) therapy, which increased the number, but not function, of protective Ly49H+ NK-cells. Thus, these findings define sepsis-induced changes of the NK-cell compartment and provide insight into potential therapeutic interventions aimed at resolving sepsis-induced immunoparalysis in sepsis survivors.
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Affiliation(s)
- Isaac J. Jensen
- Interdisciplinary Graduate Program in Immunology, University of Iowa, Iowa City, Iowa, United States of America
- Department of Pathology, University of Iowa, Iowa City, Iowa, United States of America
| | - Christina S. Winborn
- Department of Pathology, University of Iowa, Iowa City, Iowa, United States of America
| | - Micaela G. Fosdick
- Interdisciplinary Graduate Program in Molecular Medicine, University of Iowa, Iowa City, Iowa, United States of America
| | - Peng Shao
- Department of Microbiology and Immunology, University of Iowa, Iowa City, Iowa, United States of America
| | - Mikaela M. Tremblay
- Department of Microbiology and Immunology, University of Iowa, Iowa City, Iowa, United States of America
| | - Qiang Shan
- Department of Microbiology and Immunology, University of Iowa, Iowa City, Iowa, United States of America
| | - Sandeep Kumar Tripathy
- Gastroenterology Division, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Christopher M. Snyder
- Department of Immunology and Microbiology, Thomas Jefferson University, Philadelphia, Pennsylvania, United States of America
| | - Hai-Hui Xue
- Interdisciplinary Graduate Program in Immunology, University of Iowa, Iowa City, Iowa, United States of America
- Department of Microbiology and Immunology, University of Iowa, Iowa City, Iowa, United States of America
| | - Thomas S. Griffith
- Microbiology, Immunology, and Cancer Biology Ph.D. Program, University of Minnesota, Minneapolis, Minnesota, United States of America
- Center for Immunology, University of Minnesota, Minneapolis, Minnesota, United States of America
- Department of Urology, University of Minnesota, Minneapolis, Minnesota, United States of America
- Minneapolis VA Health Care, University of Minnesota, Minneapolis, Minnesota, United States of America
| | - Jon C. Houtman
- Interdisciplinary Graduate Program in Immunology, University of Iowa, Iowa City, Iowa, United States of America
- Interdisciplinary Graduate Program in Molecular Medicine, University of Iowa, Iowa City, Iowa, United States of America
- Department of Microbiology and Immunology, University of Iowa, Iowa City, Iowa, United States of America
| | - Vladimir P. Badovinac
- Interdisciplinary Graduate Program in Immunology, University of Iowa, Iowa City, Iowa, United States of America
- Department of Pathology, University of Iowa, Iowa City, Iowa, United States of America
- Department of Microbiology and Immunology, University of Iowa, Iowa City, Iowa, United States of America
- * E-mail:
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22
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Ulinastatin mediates suppression of regulatory T cells through TLR4/NF-κB signaling pathway in murine sepsis. Int Immunopharmacol 2018; 64:411-423. [PMID: 30261464 DOI: 10.1016/j.intimp.2018.09.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 09/06/2018] [Accepted: 09/17/2018] [Indexed: 12/29/2022]
Abstract
CD4+CD25+ regulatory T cells (Tregs) play an essential role in the suppression of the immune response and prevention of autoimmune reactions. The activation of TLR4, which provides a critical link between the innate and adaptive immune systems, has been implicated in regulating the function of Tregs. Ulinastatin (UTI) is a broad-spectrum protease inhibitor that has been shown to modulate innate immunity and pro-inflammatory signaling in sepsis. In addition, there are reports that UTI may modulate the functional activity of Tregs to influence the inflammatory response in infectious disease. In the present study, we investigated the effect of UTI on the activity of Tregs, which was assessed by measuring the survival and inflammatory responses of mice with cecal ligation and puncture (CLP)-induced sepsis. In addition, we further explored the cellular and molecular mechanisms involved in these effects. The results showed that UTI could enhance survival and attenuate inflammatory responses during CLP-induced sepsis. Moreover, sepsis-induced increases in the quantity and activity of Tregs were attenuated under UTI treatment, but not in TLR4-/- mice. We also found that the functional changes in Tregs could be attributed to the TLR4/NF-κB signaling pathway. Collectively, our results indicated that UTI could ameliorate inflammatory damage by modulating the quantity and function of Tregs via the TLR4/NF-κB signaling pathway. Our study provides theoretical and experimental evidence for the administration of UTI in the treatment of sepsis and other acute critical illnesses.
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23
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Wang X, Buechler NL, Woodruff AG, Long DL, Zabalawi M, Yoza BK, McCall CE, Vachharajani V. Sirtuins and Immuno-Metabolism of Sepsis. Int J Mol Sci 2018; 19:ijms19092738. [PMID: 30216989 PMCID: PMC6164482 DOI: 10.3390/ijms19092738] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 09/06/2018] [Accepted: 09/08/2018] [Indexed: 02/01/2023] Open
Abstract
Sepsis and septic shock are the leading causes of death in non-coronary intensive care units worldwide. During sepsis-associated immune dysfunction, the early/hyper-inflammatory phase transitions to a late/hypo-inflammatory phase as sepsis progresses. The majority of sepsis-related deaths occur during the hypo-inflammatory phase. There are no phase-specific therapies currently available for clinical use in sepsis. Metabolic rewiring directs the transition from hyper-inflammatory to hypo-inflammatory immune responses to protect homeostasis during sepsis inflammation, but the mechanisms underlying this immuno-metabolic network are unclear. Here, we review the roles of NAD+ sensing Sirtuin (SIRT) family members in controlling immunometabolic rewiring during the acute systemic inflammatory response associated with sepsis. We discuss individual contributions among family members SIRT 1, 2, 3, 4 and 6 in regulating the metabolic switch between carbohydrate-fueled hyper-inflammation to lipid-fueled hypo-inflammation. We further highlight the role of SIRT1 and SIRT2 as potential "druggable" targets for promoting immunometabolic homeostasis and increasing sepsis survival.
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Affiliation(s)
- Xianfeng Wang
- Departments of Anesthesiology, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - Nancy L Buechler
- Departments of Anesthesiology, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - Alan G Woodruff
- Departments of Anesthesiology, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - David L Long
- Departments of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - Manal Zabalawi
- Departments of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - Barbara K Yoza
- Departments of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
- Departments of Surgery, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - Charles E McCall
- Departments of Anesthesiology, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
- Departments of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
| | - Vidula Vachharajani
- Departments of Anesthesiology, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
- Departments of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA.
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24
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Identifying Therapeutic Targets for Sepsis Research: A Characterization Study of the Inflammatory Players in the Cecal Ligation and Puncture Model. Mediators Inflamm 2018; 2018:5130463. [PMID: 30174555 PMCID: PMC6098915 DOI: 10.1155/2018/5130463] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 05/23/2018] [Accepted: 05/29/2018] [Indexed: 01/04/2023] Open
Abstract
During sepsis, disturbed gastrointestinal motility and increased mucosal permeability can aggravate sepsis due to the increased risk of bacterial translocation. To help identify new therapeutic targets, there is a need for animal models that mimic the immunological changes in the gastrointestinal tract as observed during human sepsis. We therefore characterized in detail the gastrointestinal neuroimmune environment in the cecal ligation and puncture (CLP) model, which is the gold standard animal model of microbial sepsis. Mice were sacrificed at day 2 and day 7, during which gastrointestinal motility was assessed and cytokines were measured in the serum and the colon. In the spleen, lymph nodes, ileum, and colon, subsets of leukocyte populations were identified by flow cytometry. Septic animals displayed an impaired gastrointestinal motility at day 2 and day 7. Two days post-CLP, increased serum and colonic levels of proinflammatory cytokines were measured. Flow cytometry revealed an influx of neutrophils in the colon and ileum, increased numbers of macrophages in the spleen and mesenteric lymph nodes, and an enhanced number of mast cells in all tissues. At day 7 post-CLP, lymphocyte depletion was observed in all tissues coinciding with increased IL-10 and TGF-β levels, as well as increased colonic levels of IL-17A and IFN-γ. Thus, CLP-induced sepsis in mice results in simultaneous activation of pro- and anti-inflammatory players at day 2 and day 7 in different tissues, mimicking human sepsis.
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25
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Hiruma T, Tsuyuzaki H, Uchida K, Trapnell BC, Yamamura Y, Kusakabe Y, Totsu T, Suzuki T, Morita S, Doi K, Noiri E, Nakamura K, Nakajima S, Yahagi N, Morimura N, Chang K, Yamada Y. IFN-β Improves Sepsis-related Alveolar Macrophage Dysfunction and Postseptic Acute Respiratory Distress Syndrome-related Mortality. Am J Respir Cell Mol Biol 2018; 59:45-55. [PMID: 29365277 PMCID: PMC6835072 DOI: 10.1165/rcmb.2017-0261oc] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 01/23/2018] [Indexed: 12/29/2022] Open
Abstract
IFN-β is reported to improve survival in patients with acute respiratory distress syndrome (ARDS), possibly by preventing sepsis-induced immunosuppression, but its therapeutic nature in ARDS pathogenesis is poorly understood. We investigated the therapeutic effects of IFN-β for postseptic ARDS to better understand its pathogenesis in mice. Postseptic ARDS was reproduced in mice by cecal ligation and puncture to induce sepsis, followed 4 days later by intratracheal instillation of Pseudomonas aeruginosa to cause pneumonia with or without subcutaneous administration of IFN-β 1 day earlier. Sepsis induced prolonged increases in alveolar TNF-α and IL-10 concentrations and innate immune reprogramming; specifically, it reduced alveolar macrophage (AM) phagocytosis and KC (CXCL1) secretion. Ex vivo AM exposure to TNF-α or IL-10 duplicated cytokine release impairment. Compared with sepsis or pneumonia alone, pneumonia after sepsis was associated with blunted alveolar KC responses and reduced neutrophil recruitment into alveoli despite increased neutrophil burden in lungs (i.e., "incomplete alveolar neutrophil recruitment"), reduced bacterial clearance, increased lung injury, and markedly increased mortality. Importantly, IFN-β reversed the TNF-α/IL-10-mediated impairment of AM cytokine secretion in vitro, restored alveolar innate immune responsiveness in vivo, improved alveolar neutrophil recruitment and bacterial clearance, and consequently reduced the odds ratio for 7-day mortality by 85% (odds ratio, 0.15; 95% confidence interval, 0.03-0.82; P = 0.045). This mouse model of sequential sepsis → pneumonia infection revealed incomplete alveolar neutrophil recruitment as a novel pathogenic mechanism for postseptic ARDS, and systemic IFN-β improved survival by restoring the impaired function of AMs, mainly by recruiting neutrophils to alveoli.
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Affiliation(s)
| | | | | | - Bruce C. Trapnell
- Division of Pulmonary Biology, Perinatal Institute, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio; and
| | - Yoshiro Yamamura
- Discovery Research Department, Pharmaceutical Research and Development Division, Maruishi Pharmaceutical Co., Ltd., Osaka, Japan
| | | | | | - Takuji Suzuki
- Division of Pulmonary Biology, Perinatal Institute, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio; and
| | | | | | - Eisei Noiri
- Department of Nephrology and Endocrinology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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26
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Toll-like receptors in immunity and inflammatory diseases: Past, present, and future. Int Immunopharmacol 2018; 59:391-412. [PMID: 29730580 PMCID: PMC7106078 DOI: 10.1016/j.intimp.2018.03.002] [Citation(s) in RCA: 408] [Impact Index Per Article: 68.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 02/28/2018] [Accepted: 03/01/2018] [Indexed: 02/07/2023]
Abstract
The immune system is a very diverse system of the host that evolved during evolution to cope with various pathogens present in the vicinity of environmental surroundings inhabited by multicellular organisms ranging from achordates to chordates (including humans). For example, cells of immune system express various pattern recognition receptors (PRRs) that detect danger via recognizing specific pathogen-associated molecular patterns (PAMPs) and mount a specific immune response. Toll-like receptors (TLRs) are one of these PRRs expressed by various immune cells. However, they were first discovered in the Drosophila melanogaster (common fruit fly) as genes/proteins important in embryonic development and dorso-ventral body patterning/polarity. Till date, 13 different types of TLRs (TLR1-TLR13) have been discovered and described in mammals since the first discovery of TLR4 in humans in late 1997. This discovery of TLR4 in humans revolutionized the field of innate immunity and thus the immunology and host-pathogen interaction. Since then TLRs are found to be expressed on various immune cells and have been targeted for therapeutic drug development for various infectious and inflammatory diseases including cancer. Even, Single nucleotide polymorphisms (SNPs) among various TLR genes have been identified among the different human population and their association with susceptibility/resistance to certain infections and other inflammatory diseases. Thus, in the present review the current and future importance of TLRs in immunity, their pattern of expression among various immune cells along with TLR based therapeutic approach is reviewed. TLRs are first described PRRs that revolutionized the biology of host-pathogen interaction and immune response The discovery of different TLRs in humans proved milestone in the field of innate immunity and inflammation The pattern of expression of all the TLRs expressed by human immune cells An association of various TLR SNPs with different inflammatory diseases Currently available drugs or vaccines based on TLRs and their future in drug targeting along with the role in reproduction, and regeneration
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27
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Rasid O, Cavaillon JM. Compartment diversity in innate immune reprogramming. Microbes Infect 2018; 20:156-165. [DOI: 10.1016/j.micinf.2017.12.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 12/11/2017] [Indexed: 02/07/2023]
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28
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Mechanistic insights into the protective impact of zinc on sepsis. Cytokine Growth Factor Rev 2017; 39:92-101. [PMID: 29279185 DOI: 10.1016/j.cytogfr.2017.12.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 12/19/2017] [Indexed: 12/11/2022]
Abstract
Sepsis, a systemic inflammation as a response to a bacterial infection, is a huge unmet medical need. Data accumulated over the last decade suggest that the nutritional status of patients as well as composition of their gut microbiome, are strongly linked with the risk to develop sepsis, the severity of the disease and prognosis. In particular, the essential micronutrient zinc is essential in the resistance against sepsis and has shown to be protective in animal models as well as in human patients. The potential mechanisms by which zinc protects in sepsis are discussed in this review paper: we will focus on the inflammatory response, chemotaxis, phagocytosis, immune response, oxidative stress and modulation of the microbiome. A full understanding of the mechanism of action of zinc may open new preventive and therapeutic interventions in sepsis.
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29
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Venet F, Monneret G. Advances in the understanding and treatment of sepsis-induced immunosuppression. Nat Rev Nephrol 2017; 14:121-137. [PMID: 29225343 DOI: 10.1038/nrneph.2017.165] [Citation(s) in RCA: 492] [Impact Index Per Article: 70.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Sepsis is defined as a life-threatening organ dysfunction that is caused by a dysregulated host response to infection. Sepsis can induce acute kidney injury and multiple organ failures and represents the most common cause of death in the intensive care unit. Sepsis initiates a complex immune response that varies over time, with the concomitant occurrence of both pro-inflammatory and anti-inflammatory mechanisms. As a result, most patients with sepsis rapidly display signs of profound immunosuppression, which is associated with deleterious consequences. Scientific advances have highlighted the role of metabolic failure, epigenetic reprogramming, myeloid-derived suppressor cells, immature suppressive neutrophils and immune alterations in primary lymphoid organs (the thymus and bone marrow) in sepsis. An improved understanding of the mechanisms underlying this immunosuppression as well as of the similarities between sepsis-induced immunosuppression and immune defects in cancer or immunosenescence has led to novel therapeutic strategies aimed at stimulating immune function in patients with sepsis. Trials assessing the therapeutic benefit of IL-7, granulocyte-macrophage colony-stimulating factor (GM-CSF) and antibodies against programmed cell death protein 1 (PD1) and programmed cell death 1 ligand 1 (PDL1) for the treatment of sepsis are in progress. The reappraisal of sepsis pathophysiology has also resulted in a novel approach to the design of clinical trials evaluating sepsis treatments, based on an evaluation of the immune status and biomarker-based stratification of patients.
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Affiliation(s)
- Fabienne Venet
- Hospices Civils de Lyon, Hôpital Edouard Herriot, Immunology Department, Flow Division, 69003 Lyon, France.,Equipe d'Accueil 7426, Pathophysiology of Injury-Induced Immunosuppression, Université Claude Bernard Lyon 1, Hospices Civils de Lyon - bioMérieux, Hôpital Edouard Herriot, 69003 Lyon, France
| | - Guillaume Monneret
- Hospices Civils de Lyon, Hôpital Edouard Herriot, Immunology Department, Flow Division, 69003 Lyon, France.,Equipe d'Accueil 7426, Pathophysiology of Injury-Induced Immunosuppression, Université Claude Bernard Lyon 1, Hospices Civils de Lyon - bioMérieux, Hôpital Edouard Herriot, 69003 Lyon, France
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Huo R, Wang L, Wang X, Zhao Y, Wang Y, Zhao X, Chang L, Liu SL, Tong D, Zhang H, Huang Y. Removal of regulatory T cells prevents secondary chronic infection but increases the mortality of subsequent sub-acute infection in sepsis mice. Oncotarget 2017; 7:10962-75. [PMID: 26918357 PMCID: PMC4905451 DOI: 10.18632/oncotarget.7682] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 02/16/2016] [Indexed: 01/08/2023] Open
Abstract
The immunosuppression following initial septic insult impairs resistance to secondary infection. Modulation of lymphocytes population may help to develop an effective therapeutic strategy. In this study, lipopolysaccharide (LPS)-induced endotoxemia was employed as the initial septic insult. 24 hours later, mice underwent cecal ligation and puncture to induce chronic or sub-acute peritonitis. Potential usefulness of T regs deletion antibody (anti-CD25) in improving LPS-induced immunosuppression and the survival of subsequent different infections were evaluated. LPS injection induced lymphocyte loss and led to decreased IL-6, TNF-α and IFN-γ, and weakened bacteria clearance upon chronic peritonitis at 24 h post-LPS, whereas reconstitution with lymphocytes reversed these changes. LPS-induced T regs expansion contributed to T and NK cells decrease in number and activity during sepsis. Depletion of T regs using anti-CD25 antibodies partly prevented lymphocyte loss and increased the responses of T and NK cells to subsequent stimulation, resulting in significantly increased bacterial clearance and survival in a 2-hit model of chronic peritonitis, but which significantly increased early mortality upon subsequently sub-acute infection. Yet, using lower dosage of anti-CD25 antibodies to moderate down-regulate T regs levels could partly improve bacterial clearance and survival in either chronic or sub-acute infection. These results demonstrate that using anti-CD25 antibodies to deplete T regs can ameliorate immunosuppression through increasing T cells and NK cells responses in sepsis, which is beneficial for preventing subsequently chronic infection, but will probably bring some deleterious effects for subsequent sub-acute infection.
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Affiliation(s)
- Ruichao Huo
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Lili Wang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Xiaoya Wang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Yong Zhao
- Laboratory Animal Center, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Yi Wang
- Laboratory Animal Center, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Xiaomin Zhao
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Lingling Chang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Shan-Lu Liu
- Department of Molecular Microbiology and Immunology, Bond Life Sciences Center, University of Missouri, Columbia, MO, United States of America
| | - Dewen Tong
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
| | - Hai Zhang
- Laboratory Animal Center, Fourth Military Medical University, Xi'an, Shaanxi, China
| | - Yong Huang
- College of Veterinary Medicine, Northwest A&F University, Yangling, Shaanxi, China
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31
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Quatrini L, Wieduwild E, Guia S, Bernat C, Glaichenhaus N, Vivier E, Ugolini S. Host resistance to endotoxic shock requires the neuroendocrine regulation of group 1 innate lymphoid cells. J Exp Med 2017; 214:3531-3541. [PMID: 29141867 PMCID: PMC5716043 DOI: 10.1084/jem.20171048] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 09/07/2017] [Accepted: 10/11/2017] [Indexed: 12/17/2022] Open
Abstract
Quatrini et al. demonstrate that neuroendocrine regulation of IFN-γ production by group 1 innate lymphoid cells (ILCs) is required to develop an IL-10–dependent resistance to endotoxin-induced septic shock, revealing a novel strategy of host protection from immunopathology. Upon infection, the immune system produces inflammatory mediators important for pathogen clearance. However, inflammation can also have deleterious effect on the host and is tightly regulated. Immune system–derived cytokines stimulate the hypothalamic–pituitary–adrenal (HPA) axis, triggering endogenous glucocorticoid production. Through interaction with ubiquitously expressed glucocorticoid receptors (GRs), this steroid hormone has pleiotropic effects on many cell types. Using a genetic mouse model in which the gene encoding the GR is selectively deleted in NKp46+ innate lymphoid cells (ILCs), we demonstrated a major role for the HPA pathway in host resistance to endotoxin-induced septic shock. GR expression in group 1 ILCs is required to limit their IFN-γ production, thereby allowing the development of IL-10–dependent tolerance to endotoxin. These findings suggest that neuroendocrine axes are crucial for tolerization of the innate immune system to microbial endotoxin exposure through direct corticosterone-mediated effects on NKp46-expressing innate cells, revealing a novel strategy of host protection from immunopathology.
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Affiliation(s)
- Linda Quatrini
- Aix-Marseille Université, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France
| | - Elisabeth Wieduwild
- Aix-Marseille Université, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France
| | - Sophie Guia
- Aix-Marseille Université, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France
| | - Claire Bernat
- Aix-Marseille Université, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France
| | - Nicolas Glaichenhaus
- Université Côte d'Azur, CNRS, INSERM, Institut de Pharmacologie Moléculaire et Cellulaire, Valbonne, France
| | - Eric Vivier
- Aix-Marseille Université, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France.,Service d'Immunologie, Hôpital de la Timone, Assistance Publique-Hôpitaux de Marseille, Marseille, France
| | - Sophie Ugolini
- Aix-Marseille Université, CNRS, INSERM, CIML, Centre d'Immunologie de Marseille-Luminy, Marseille, France
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Abstract
Sepsis is caused by a dysregulated host response to infection. Immune responses determine the characteristics of sepsis. The body's protection against infection involves danger signal surveillance and recognition from nonself, effector functions in response to sensing danger signals, homeostatic regulation, and generation of immunologic memory. During sepsis, the immune system is activated by pathogen-associated and host-derived molecular patterns. Detecting these molecular patterns generates multisystem responses. Impaired organ function remote to the site of infection is the unifying feature. The processes by which an appropriate response to a microbial invader change from adaptive to maladaptive and dysregulated remain unclear.
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Natural Killer Cell Assessment in Peripheral Circulation and Bronchoalveolar Lavage Fluid of Patients with Severe Sepsis: A Case Control Study. Int J Mol Sci 2017; 18:ijms18030616. [PMID: 28287491 PMCID: PMC5372632 DOI: 10.3390/ijms18030616] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 03/02/2017] [Accepted: 03/07/2017] [Indexed: 12/29/2022] Open
Abstract
Sepsis is a complex systemic inflammatory syndrome, the most common cause of which is attributed to systemic underlying bacterial infection. The complete mechanisms of the dynamic pro- and anti-inflammatory processes underlying the pathophysiology of sepsis remain poorly understood. Natural killer (NK) cells play a crucial role in the pathophysiology of sepsis, leading to exaggerated inflammation due their rapid response and production of pro-inflammatory cytokines such as interferon gamma (IFN-γ). Several studies have already shown that NK cells undergo lymphopenia in the peripheral blood of patients with sepsis. However, our understanding of the mechanisms behind its cellular trafficking and its role in disease development is restricted to studies in animal models. In this study, we aimed to compare the human NK cell subset (CD56bright or dim) levels in the peripheral blood and bronchoalveolar lavage (BAL) fluid of sepsis patients. We conducted a case-control study with a sample size consisting of 10 control patients and 23 sepsis patients enrolled at the Hospital Cajuru (Curitiba/PR, Brazil) from 2013 to 2015. Although we were able to confirm previous observations of peripheral blood lymphopenia, no significant differences were detected in NK cell levels in the BAL fluid of these patients. Overall, these findings strengthened the evidence that peripheral blood lymphopenia is likely to be associated with cell death as a consequence of sepsis.
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miR-146a negatively regulates NK cell functions via STAT1 signaling. Cell Mol Immunol 2016; 14:712-720. [PMID: 26996068 DOI: 10.1038/cmi.2015.113] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Revised: 12/10/2015] [Accepted: 12/21/2015] [Indexed: 12/22/2022] Open
Abstract
It is known that natural killer (NK) cell function is downregulated in chronic hepatitis B (CHB)-infected patients and in hepatic carcinoma (HCC) patients, but the mechanisms underlying this functional downregulation are largely unclear. In this study, microRNA (miR)-146a expression increased in NK cells from CHB and HCC patients compared with NK cells from healthy donors, and miR-146a levels were negatively correlated to NK cell functions. Overexpression of miR-146a reduced NK cell-mediated cytotoxicity and the production of interferon (IFN)-γ and tumor necrosis factor-α, which were reversed upon inhibition of miR-146a. In NK cells, miR-146a expression was induced by interleukin (IL)-10 and transforming growth factor-β, but reduced after treatment with interleukin-12, IFN-α and IFN-β. We further revealed that miR-146a regulated NK cell functions by targeting STAT1. Taken together, upregulated miR-146a expression, at least partially, attributes to NK cell dysfunction in CHB and HCC patients. Therefore, miR-146a may become a therapeutic target with great potential to ameliorate NK cell functions in liver disease.
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Krasnova Y, Putz EM, Smyth MJ, Souza-Fonseca-Guimaraes F. Bench to bedside: NK cells and control of metastasis. Clin Immunol 2015; 177:50-59. [PMID: 26476139 DOI: 10.1016/j.clim.2015.10.001] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 10/08/2015] [Accepted: 10/14/2015] [Indexed: 12/22/2022]
Abstract
Natural killer (NK) cells play a critical role in host immune responses against tumor growth and metastasis. The numerous mechanisms used by NK cells to regulate and control cancer metastasis include interactions with tumor cells via specific receptors and ligands as well as direct cytotoxicity and cytokine-induced effector mechanisms. NK cells also play a role in tumor immunosurveillance and inhibition of metastases formation by recognition and killing of tumor cells. In this review, we provide an overview of the molecular mechanisms of NK cell responses against tumor metastases and discuss multiple strategies by which tumors evade NK cell-mediated surveillance. With an increasing understanding of the molecular mechanisms driving NK cell activity, there is a growing potential for the development of new cancer immunotherapies. Here we provide a historical background on NK cell-based therapies and discuss the implications of recent and ongoing clinical trials using novel NK cell-based immunotherapy.
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Affiliation(s)
- Yelena Krasnova
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland 4006, Australia; School of Medicine, University of Queensland, St Lucia, Queensland 4006, Australia
| | - Eva Maria Putz
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland 4006, Australia
| | - Mark J Smyth
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland 4006, Australia; School of Medicine, University of Queensland, St Lucia, Queensland 4006, Australia
| | - Fernando Souza-Fonseca-Guimaraes
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland 4006, Australia; School of Medicine, University of Queensland, St Lucia, Queensland 4006, Australia.
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Monneret G, Venet F. Sepsis-induced immune alterations monitoring by flow cytometry as a promising tool for individualized therapy. CYTOMETRY PART B-CLINICAL CYTOMETRY 2015; 90:376-86. [PMID: 26130241 DOI: 10.1002/cyto.b.21270] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 06/16/2015] [Accepted: 06/25/2015] [Indexed: 12/20/2022]
Abstract
Septic syndromes remain a major although largely under-recognized health care problem and represent the first cause of mortality in intensive care units. While sepsis has, for long, been solely described as inducing a tremendous systemic inflammatory response, novel findings indicate that sepsis indeed initiates a more complex immunologic response that varies over time, with the concomitant occurrence of both pro- and anti-inflammatory mechanisms. As a resultant, after a short proinflammatory phase, septic patients enter a stage of protracted immunosuppression. This is illustrated in those patients by reactivation of dormant viruses (CMV or HSV) or infections due to pathogens, including fungi, which are normally pathogenic solely in immunocompromised hosts. Although mechanisms are not totally understood, these alterations might be directly responsible for worsening outcome in patients who survived initial resuscitation as nearly all immune functions are deeply compromised. Indeed, the magnitude and persistence over time of these dysfunctions have been associated with increased mortality and health-care associated infection rate. Consequently, new promising therapeutic avenues are currently emerging from those recent findings such as adjunctive immunostimulation (IFN-γ, GM-CSF, IL-7, anti-PD1/L1 antibodies) for the most immunosuppressed patients. Nevertheless, as there is no clinical sign of immune dysfunctions, the prerequisite for such therapeutic intervention relies on our capacity in identifying the patients who could benefit from immunostimulation. To date, the most robust biomarkers of sepsis-induced immunosuppression are measured by flow cytometry. Of them, the decreased expression of monocyte HLA-DR appears as a "gold standard." This review reports on the mechanisms sustaining sepsis-induced immunosuppression and its related biomarkers measurable by flow cytometry. The objective is to integrate the most recent facts in an up-to-date account of clinical results, flow cytometry aspects as well as issues in results standardization for multicenter studies. © 2015 International Clinical Cytometry Society.
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Affiliation(s)
- Guillaume Monneret
- Cellular Immunology Laboratory, Hospices Civils De Lyon, Hôpital E Herriot, Lyon, France
- Université Claude Bernard Lyon I, Immunology Department, Lyon, France
- TRIGGERSEP (TRIal Group for Global Evaluation and Research in SEPsis)/F-CRIN Network, France
| | - Fabienne Venet
- Cellular Immunology Laboratory, Hospices Civils De Lyon, Hôpital E Herriot, Lyon, France
- Université Claude Bernard Lyon I, Immunology Department, Lyon, France
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Julian MW, Strange HR, Ballinger MN, Hotchkiss RS, Papenfuss TL, Crouser ED. Tolerance and Cross-Tolerance following Toll-Like Receptor (TLR)-4 and -9 Activation Are Mediated by IRAK-M and Modulated by IL-7 in Murine Splenocytes. PLoS One 2015. [PMID: 26218271 PMCID: PMC4517781 DOI: 10.1371/journal.pone.0132921] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Objective Immune suppression during critical illness predisposes to serious infections. We sought to determine the mechanisms regulating tolerance and cross-tolerance to common pro-inflammatory danger signals in a model that recapitulates the intact in vivo immune response. Materials and Methods Flt3-expanded splenocytes obtained from wild-type or matching IRAK-M knockout (IRAK-M-/-), C57BL/6, male mice (8–10 weeks old) were treated repeatedly or alternately with either LPS or CpGA DNA, agonists of Toll-like receptor (TLR)-4 and -9, respectively, over successive 24-hour periods. Supernatants were collected following each 24-hour period with cytokine release (ELISA) and splenocyte IRAK-M expression (Western blot) determined. Tolerance and cross-tolerance were assessed in the absence or presence of programmed death receptor (PD)-1 blocking antibody or IL-7 pre-treatment. Main Results Splenocytes notably exhibited both tolerance and cross-tolerance to subsequent treatments with either LPS or CpGA DNA. The character of tolerance and cross-tolerance in this model was distinct following initial LPS or CpGA treatment in that TNFα and IFNγ release (not IL-10) were suppressed following LPS; whereas, initial CpGA treatment suppressed TNFα, IFNγ and IL-10 release in response to subsequent stimulation (LPS or CpGA). Tolerance and cross-tolerance were unrelated to IL-10 release or PD-1 but were attenuated in IRAK-M-/- splenocytes. IL-7 significantly suppressed IRAK-M expression and restored TNFα and IFNγ production without influencing IL-10 release. Conclusions In summary, acute immune tolerance and cross-tolerance in response to LPS or CpGA were distinct in that LPS selectively suppressed pro-inflammatory cytokine responses; whereas, CpGA suppressed both pro- and anti-inflammatory responses. The induction of tolerance and cross-tolerance in response to common danger signals was mechanistically unrelated to IL-10 or PD-1 but was directly influenced by IRAK-M expression. IL-7 reduced IRAK-M expression and attenuated immune tolerance induced by either LPS or CpGA, and thus may be useful for reversal of immune tolerance in the setting of critical illness.
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Affiliation(s)
- Mark W. Julian
- Dorothy M. Davis Heart and Lung Research Institute, Division of Pulmonary Allergy, Critical Care, and Sleep Medicine, Wexner Medical Center, Columbus, OH, United States of America
| | - Heather R. Strange
- College of Veterinary Medicine, Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, United States of America
| | - Megan N. Ballinger
- Dorothy M. Davis Heart and Lung Research Institute, Division of Pulmonary Allergy, Critical Care, and Sleep Medicine, Wexner Medical Center, Columbus, OH, United States of America
| | - Richard S. Hotchkiss
- Departments of Anesthesiology, Medicine and Surgery, Washington University School of Medicine, St. Louis, MO, United States of America
| | - Tracey L. Papenfuss
- College of Veterinary Medicine, Department of Veterinary Biosciences, The Ohio State University, Columbus, OH, United States of America
| | - Elliott D. Crouser
- Dorothy M. Davis Heart and Lung Research Institute, Division of Pulmonary Allergy, Critical Care, and Sleep Medicine, Wexner Medical Center, Columbus, OH, United States of America
- * E-mail:
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Papanikolaou IC, Boki KA, Giamarellos-Bourboulis EJ, Kotsaki A, Kagouridis K, Karagiannidis N, Polychronopoulos VS. Innate immunity alterations in idiopathic interstitial pneumonias and rheumatoid arthritis-associated interstitial lung diseases. Immunol Lett 2014; 163:179-86. [PMID: 25540922 DOI: 10.1016/j.imlet.2014.12.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2014] [Revised: 12/01/2014] [Accepted: 12/03/2014] [Indexed: 02/04/2023]
Abstract
BACKGROUND This is a prospective cohort study elucidating innate immunity in idiopathic pulmonary fibrosis (IPF), cryptogenic organizing pneumonia (COP), rheumatoid arthritis-associated usual interstitial pneumonia (RA-UIP) and RA-associated non specific interstitial pneumonia (RA-NSIP). METHODS 23 IPF subjects, 9 COP subjects, 5 RA-UIP subjects, 8 RA-NSIP subjects were enrolled. 10 subjects were excluded. 19 healthy subjects served as controls. Blood and bronchoalveolar lavage (BAL) were obtained. Natural killer (NK) and NKT cells, NK cells apoptosis and the expression of triggering receptor expressed on myeloid cells type 1 (TREM-1) were assessed. Tumor necrosis factor-α (TNF-α) production was measured in cell cultures after stimulation with lipopolysaccharide endotoxin (LPS) and Pam3CysSK3, and in BAL. Surface expression of Toll-like receptors (TLR) 2 and 4 on peripheral blood monocytes (PBMC's) and circulating NK cells was also assessed. RESULTS RA-NSIP had low blood NKs, marginally insignificant (p=0.07). These NKs poorly produced TNF-α after LPS stimulation. TLR's expression on NK cells was similar throughout disease groups and controls. PBMC's mainly from IPF patients exhibited low TNF-α production after LPS stimulation but not after Pam3CysSK3 stimulation, while TLR4 expression on PBMC's was found normal in all study groups. TLR2 expression on PBMC's was increased in IPF, but mainly in COP, RA-UIP and RA-NSIP (p=0.015). TREM-1 expression was significant on COP monocytes and on COP neutrophils versus controls. RA-NSIP monocytes also exhibited TREM-1 expression (p=0.07). Decreased TNF-α concentration in BAL was finally observed in IPF and RA-UIP. CONCLUSIONS Innate immunity in the lungs and the peripheral circulation in IPF and RA-UIP are similar and more fibrotic than in RA-NSIP which is characterized by NK cell depletion and dysfunction. TREM-1 and TLR's likely affect patterns of inflammation in various interstitial lung diseases.
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Affiliation(s)
- Ilias C Papanikolaou
- 3rd Pulmonary Department, Sismanoglion General Hospital, Sismanogliou 1, 15126 Attica, Greece.
| | - Kyriaki A Boki
- Rheumatology Department, Sismanoglion General Hospital, Sismanogliou 1, 15126 Attica, Greece.
| | | | - Antigoni Kotsaki
- 4th Department of Internal Medicine, ATTIKON University General Hospital, Rimini 1, 12462 Attica, Greece.
| | - Konstantinos Kagouridis
- 3rd Pulmonary Department, Sismanoglion General Hospital, Sismanogliou 1, 15126 Attica, Greece.
| | - Napoleon Karagiannidis
- 3rd Pulmonary Department, Sismanoglion General Hospital, Sismanogliou 1, 15126 Attica, Greece.
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Ge Y, Chen J, Qiu X, Zhang J, Cui L, Qi Y, Liu X, Qiu J, Shi Z, Lun Z, Shen J, Wang Y. Natural killer cell intrinsic toll-like receptor MyD88 signaling contributes to IL-12-dependent IFN-γ production by mice during infection with Toxoplasma gondii. Int J Parasitol 2014; 44:475-84. [PMID: 24727091 DOI: 10.1016/j.ijpara.2014.03.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 02/28/2014] [Accepted: 03/11/2014] [Indexed: 01/22/2023]
Abstract
Myeloid differentiation factor 88 (MyD88)-dependent IL-12 secretion by dendritic cells is critical for natural killer cell-mediated IFN-γ production and innate resistance to Toxoplasma gondii. Although MyD88(-/-) mice challenged with T. gondii have defective IL-12 responses and succumb to infection, administration of IL-12 to MyD88(-/-) mice fails to prevent acute mortality, suggesting that MyD88 may mediate signals within natural killer cells important for IL-12-dependent IFN-γ production and innate resistance to this parasite. In this study, we found that T. gondii antigens and IL-12 could synergistically trigger IFN-γ secretion by natural killer cells, which was dependent on toll-like receptor-MyD88 signaling. Further analysis showed that p38 mitogen-activated protein kinase, extracellular signal-regulated kinase, c-Jun N-terminal kinase and NF-κB multiple pathways downstream of MyD88 contributed to IFN-γ production by natural killer cells. Moreover, the well-established toll-like receptor agonists, T. gondii profilin (Tgprofilin) and T. gondii heat shock protein 70 (TgHSP70) could evoke a similar IFN-γ secretory response in natural killer cells to that evoked by T. gondii antigens. In vivo adoptive transfer experiments showed that, upon challenge with T. gondii, NOD/SCID-β2 microglobulin null (NOD/SCID-β2m(-/-)) mice injected i.v. with MyD88(-/-) natural killer cells had reduced serum IFN-γ levels and increased splenic tachyzoite burdens compared with those injected i.v. with wild-type natural killer cells. Taken together, these findings demonstrate a critical role for natural killer cell intrinsic toll-like receptor-MyD88 signaling in IL-12-dependent early IFN-γ production and innate resistance to T. gondii.
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Affiliation(s)
- Yiyue Ge
- Department of Pathogen Biology, Key Laboratory of Pathogen Biology of Jiangsu Province, Nanjing Medical University, Nanjing, China; Institute of Pathogenic Microbiology, Jiangsu Provincial Center for Disease Prevention and Control, Key Laboratories of Enteric Pathogenic Microbiology, Ministry of Health, Nanjing, China
| | - Jinling Chen
- Department of Pathogen Biology, Key Laboratory of Pathogen Biology of Jiangsu Province, Nanjing Medical University, Nanjing, China; Department of Parasitology and Microbiology, School of Medicine, Nantong University, Nantong, Jiangsu, China
| | - Xiaoyan Qiu
- Department of Pathogen Biology, Key Laboratory of Pathogen Biology of Jiangsu Province, Nanjing Medical University, Nanjing, China
| | - Jie Zhang
- Department of Pathogen Biology, Key Laboratory of Pathogen Biology of Jiangsu Province, Nanjing Medical University, Nanjing, China
| | - Lunbiao Cui
- Institute of Pathogenic Microbiology, Jiangsu Provincial Center for Disease Prevention and Control, Key Laboratories of Enteric Pathogenic Microbiology, Ministry of Health, Nanjing, China
| | - Yuhua Qi
- Institute of Pathogenic Microbiology, Jiangsu Provincial Center for Disease Prevention and Control, Key Laboratories of Enteric Pathogenic Microbiology, Ministry of Health, Nanjing, China
| | - Xinjian Liu
- Department of Pathogen Biology, Key Laboratory of Pathogen Biology of Jiangsu Province, Nanjing Medical University, Nanjing, China
| | - Jingfan Qiu
- Department of Pathogen Biology, Key Laboratory of Pathogen Biology of Jiangsu Province, Nanjing Medical University, Nanjing, China
| | - Zhiyang Shi
- Institute of Pathogenic Microbiology, Jiangsu Provincial Center for Disease Prevention and Control, Key Laboratories of Enteric Pathogenic Microbiology, Ministry of Health, Nanjing, China
| | - Zhaorong Lun
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-Sen University, Guangzhou, China
| | - Jilong Shen
- Department of Parasitology, Anhui Medical University, Hefei, China
| | - Yong Wang
- Department of Pathogen Biology, Key Laboratory of Pathogen Biology of Jiangsu Province, Nanjing Medical University, Nanjing, China.
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Pastille E, Pohlmann S, Wirsdörfer F, Reib A, Flohé SB. A disturbed interaction with accessory cells upon opportunistic infection with Pseudomonas aeruginosa contributes to an impaired IFN-γ production of NK cells in the lung during sepsis-induced immunosuppression. Innate Immun 2014; 21:115-26. [PMID: 24406749 DOI: 10.1177/1753425913517274] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Impaired resistance to Pseudomonas aeruginosa-induced pneumonia after cecal ligation and puncture (CLP), a mouse model for human polymicrobial sepsis, is associated with decreased IFN-γ, but increased IL-10, levels in the lung. We investigated the so far unknown mechanisms underlying this reduced IFN-γ synthesis in CLP mice. CD11b(+) NK cells, but not T or NKT cells in the lung were impaired in IFN-γ synthesis upon challenge with Pseudomonas in vitro and in vivo after CLP. The inhibition of NK cells was independent of IL-10. IFN-γ synthesis of NK cells was only partly restored by addition of recombinant IL-12. Accessory cells including dendritic cells and alveolar macrophages were required for maximal IFN-γ secretion. But accessory cells of CLP mice suppressed the IFN-γ secretion from naive lung leukocytes. In turn, naive accessory cells were unable to restore the IFN-γ production from lung leukocytes of CLP mice. Thus, a disturbed interaction of accessory cells and NK cells is involved in the impaired IFN-γ release in response to Pseudomonas in the lung of CLP mice. Considering the importance of IFN-γ in the immune defense against bacteria the dysfunction of accessory cells and NK cells might contribute to the enhanced susceptibility to Pseudomonas after CLP.
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Affiliation(s)
- Eva Pastille
- Surgical Research, Department of Trauma Surgery, University Hospital Essen, University Duisburg-Essen, Essen, Germany Institute for Medical Microbiology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Stephanie Pohlmann
- Surgical Research, Department of Trauma Surgery, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Florian Wirsdörfer
- Surgical Research, Department of Trauma Surgery, University Hospital Essen, University Duisburg-Essen, Essen, Germany Institute of Cell Biology (Cancer Research), Medical School, University Duisburg-Essen, Essen, Germany
| | - Anna Reib
- Surgical Research, Department of Trauma Surgery, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - Stefanie B Flohé
- Surgical Research, Department of Trauma Surgery, University Hospital Essen, University Duisburg-Essen, Essen, Germany
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41
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TLR-mediated activation of NK cells and their role in bacterial/viral immune responses in mammals. Immunol Cell Biol 2013; 92:256-62. [PMID: 24366517 DOI: 10.1038/icb.2013.99] [Citation(s) in RCA: 137] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Revised: 11/20/2013] [Accepted: 11/23/2013] [Indexed: 12/13/2022]
Abstract
Natural killer (NK) cells are important in innate immunity, first described as guardians for the detection and clearance of transformed or virus-infected cells. Later, this cell type was revealed to be also able to recognize and respond to bacteria-infected cells. NK cells possess receptors allowing them to sense and respond to viral and bacterial patterns, including Toll-like receptors (TLRs). Initially described in other innate immune cells, particularly monocytes/macrophages, TLRs have more recently been characterized in NK cells. Controversies remain regarding the TLR expression in NK cells and their responsiveness to agonists, specifically the requirement for the presence of accessory cells, such as dendritic cells, or of accessory cytokines (IL-2, IL-12, IL-15 and IL-18) to respond to TLR agonists. Upon TLR activation, NK cells are an important source of IFN-γ and granulocyte macrophage colony-stimulating factor, cytokines necessary to fight infection but that can also contribute to deleterious inflammation if produced in excessive amounts. Here, we review the current knowledge concerning the expression of TLRs in and on NK cells and the responsiveness to their agonists and review the literature on the role of NK cells in the sensing of bacterial or viral patterns and in combatting infection.
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Hotchkiss RS, Monneret G, Payen D. Sepsis-induced immunosuppression: from cellular dysfunctions to immunotherapy. Nat Rev Immunol 2013; 13:862-74. [PMID: 24232462 PMCID: PMC4077177 DOI: 10.1038/nri3552] [Citation(s) in RCA: 1651] [Impact Index Per Article: 150.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Sepsis - which is a severe life-threatening infection with organ dysfunction - initiates a complex interplay of host pro-inflammatory and anti-inflammatory processes. Sepsis can be considered a race to the death between the pathogens and the host immune system, and it is the proper balance between the often competing pro- and anti-inflammatory pathways that determines the fate of the individual. Although the field of sepsis research has witnessed the failure of many highly touted clinical trials, a better understanding of the pathophysiological basis of the disorder and the mechanisms responsible for the associated pro- and anti-inflammatory responses provides a novel approach for treating this highly lethal condition. Biomarker-guided immunotherapy that is administered to patients at the proper immune phase of sepsis is potentially a major advance in the treatment of sepsis and in the field of infectious disease.
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Affiliation(s)
- Richard S Hotchkiss
- Department of Anesthesiology, Medicine, and Surgery, Washington University School of Medicine, St Louis, Missouri 63110, USA
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Souza-Fonseca-Guimaraes F, Cavaillon JM, Adib-Conquy M. Bench-to-bedside review: Natural killer cells in sepsis - guilty or not guilty? CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2013; 17:235. [PMID: 23998530 PMCID: PMC4057064 DOI: 10.1186/cc12700] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Bacterial sepsis and septic shock are complex inflammatory disorders associated with a systemic inflammatory response syndrome. In the most severe cases of infection, an overzealous release of pro-inflammatory cytokines and inflammatory mediators by activated leukocytes, epithelial cells and endothelial cells, known as a 'cytokine storm', leads to deleterious effects such as organ dysfunction and even death. By the end of the 20th century, natural killer (NK) cells were for the first time identified as important players during sepsis. The role of this cell type was, however, double-edged, either 'angel' or 'devil' depending upon the bacterial infection model under study. Bacterial sensors (such as Toll-like receptors) have recently been shown to be expressed at the protein level in these cells. In addition, NK cells are important sources of interferon-γ and granulocyte-macrophage colony-stimulating factor, which are pro-inflammatory cytokines necessary to fight infection but can contribute to deleterious inflammation as well. Interestingly, an adaptative response occurs aimed to silence them, similar to the well-known phenomenon of endotoxin reprogramming.
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Induction of B7-H6, a ligand for the natural killer cell-activating receptor NKp30, in inflammatory conditions. Blood 2013; 122:394-404. [PMID: 23687088 DOI: 10.1182/blood-2013-01-481705] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
B7-H6, a member of the B7 family of immunoreceptors, is as a cell-surface ligand for the NKp30-activating receptor expressed on natural killer cells. B7-H6 is not detected in normal human tissues at steady state but is expressed on tumor cells. However, whether B7-H6 can be expressed in other conditions remains unknown. We analyzed here the pathways that lead to the expression of B7-H6 in nontransformed cells. In vitro, B7-H6 was induced at the surface of CD14(+)CD16(+) proinflammatory monocytes and neutrophils upon stimulation by ligands of Toll-like receptors or proinflammatory cytokines such as interleukin-1β and tumor necrosis factor α. In these conditions, a soluble form of B7-H6 (sB7-H6) was also produced by activated monocytes and neutrophils. In vivo, B7-H6 was expressed on circulating proinflammatory CD14(+)CD16(+) monocytes in a group of patients in sepsis conditions, and was linked to an increased mortality. sB7-H6 was selectively detected in the sera of patients with gram-negative sepsis and was associated with membrane vesicles that co-sedimented with the exosomal fraction. These findings reveal that B7-H6 is not only implicated in tumor immunosurveillance but also participates in the inflammatory response in infectious conditions.
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Souza-Fonseca-Guimaraes F, Parlato M, de Oliveira RB, Golenbock D, Fitzgerald K, Shalova IN, Biswas SK, Cavaillon JM, Adib-Conquy M. Interferon-γ and granulocyte/monocyte colony-stimulating factor production by natural killer cells involves different signaling pathways and the adaptor stimulator of interferon genes (STING). J Biol Chem 2013; 288:10715-21. [PMID: 23443666 DOI: 10.1074/jbc.m112.435602] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Natural killer (NK) cells are important for innate immunity in particular through the production of IFN-γ and GM-CSF. Both cytokines are important in restoration of immune function of tolerized leukocytes under inflammatory events. The expression of TLRs in NK cells has been widely studied by analyzing the mRNA of these receptors, rarely seeking their protein expression. We previously showed that murine spleen NK cells express TLR9 intracellularly and respond to CpG oligodeoxynucleotide (CpG-ODN) by producing IFN-γ and GM-CSF. However, to get such production the presence of accessory cytokines (such as IL-15 and IL-18) was required, whereas CpG-ODN or accessory cytokines alone did not induce IFN-γ or GM-CSF. We show here that TLR9 overlaps with the Golgi apparatus in NK cells. Furthermore, CpG-ODN stimulation in the presence of accessory cytokines induces the phosphorylation of c-Jun, STAT3, and IκBα. IFN-γ and GM-CSF production requires NF-κB and STAT3 activation as well as Erk-dependent mechanisms for IFN-γ and p38 signaling for GM-CSF. Using knock-out-mice, we show that UNC93b1 and IL-12 (produced by NK cells themselves) are also necessary for IFN-γ and GM-CSF production. IFN-γ production was found to be MyD88- and TLR9-dependent, whereas GM-CSF was TLR9-independent but dependent on STING (stimulator of interferon genes), a cytosolic adaptor recently described for DNA sensing. Our study thereby allows us to gain insight into the mechanisms of synergy between accessory cytokines and CpG-ODN in NK cells. It also identifies a new and alternative signaling pathway for CpG-ODN in murine NK cells.
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Affiliation(s)
- Fernando Souza-Fonseca-Guimaraes
- Institut Pasteur, Unit of Cytokines and Inflammation, Department Infection et Epidémiologie, 28 rue du Dr Roux, F-75015 Paris, France
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Phenotype and functions of natural killer cells in critically-ill septic patients. PLoS One 2012; 7:e50446. [PMID: 23236375 PMCID: PMC3516510 DOI: 10.1371/journal.pone.0050446] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Accepted: 10/22/2012] [Indexed: 12/29/2022] Open
Abstract
Rationale Natural killer cells, as a major source of interferon-γ, contribute to the amplification of the inflammatory response as well as to mortality during severe sepsis in animal models. Objective We studied the phenotype and functions of circulating NK cells in critically-ill septic patients. Methods Blood samples were taken <48 hours after admission from 42 ICU patients with severe sepsis (n = 15) or septic shock (n = 14) (Sepsis group), non-septic SIRS (n = 13) (SIRS group), as well as 21 healthy controls. The immuno-phenotype and functions of NK cells were studied by flow cytometry. Results The absolute number of peripheral blood CD3–CD56+ NK cells was similarly reduced in all groups of ICU patients, but with a normal percentage of NK cells. When NK cell cytotoxicity was evaluated with degranulation assays (CD107 expression), no difference was observed between Sepsis patients and healthy controls. Under antibody-dependent cell cytotoxicity (ADCC) conditions, SIRS patients exhibited increased CD107 surface expression on NK cells (62.9[61.3–70]%) compared to healthy controls (43.5[32.1–53.1]%) or Sepsis patients (49.2[37.3–62.9]%) (p = 0.002). Compared to healthy (10.2[6.3–13.1]%), reduced interferon-γ production by NK cells (K562 stimulation) was observed in Sepsis group (6.2[2.2–9.9]%, p<0.01), and especially in patients with septic shock. Conversely, SIRS patients exhibited increased interferon-γ production (42.9[30.1–54.7]%) compared to Sepsis patients (18.4[11.7–35.7]%, p<0.01) or healthy controls (26.8[19.3–44.9]%, p = 0.09) in ADCC condition. Conclusions Extensive monitoring of the NK-cell phenotype and function in critically-ill septic patients revealed early decreased NK-cell function with impaired interferon-γ production. These results may aid future NK-based immuno-interventions. Trial Registration NTC00699868.
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Tajima G, Delisle AJ, Hoang K, O'Leary FM, Ikeda K, Hanschen M, Stoecklein VM, Lederer JA. Immune system phenotyping of radiation and radiation combined injury in outbred mice. Radiat Res 2012; 179:101-12. [PMID: 23216446 DOI: 10.1667/rr3120.1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The complexity of a radionuclear event would be immense due to varying levels of radiation exposures and injuries caused by blast-associated trauma. With this scenario in mind, we developed a mouse model to mimic as closely as possible the potential consequences of radiation injury and radiation combined injury (RCI) on survival, immune system phenotype, and immune function. Using a mouse burn injury model and a (137)CsCl source irradiator to induce injuries, we report that the immunological response to radiation combined injury differs significantly from radiation or burn injury alone. Mice that underwent radiation combined injury showed lower injury survival and cecal ligation and puncture (CLP) induced polymicrobial sepsis survival rates than mice with single injuries. As anticipated, radiation exposure caused dose-dependent losses of immune cell subsets. We found B and T cells to be more radiation sensitive, while macrophages, dendritic cells and NK cells were relatively more resistant. However, radiation and radiation combined injury did induce significant increases in the percentages of CD4(+) regulatory T cells (Tregs) and a subset of macrophages that express cell-surface GR-1 (GR-1(+) macrophages). Immune system phenotyping analysis indicated that spleen cells from radiation combined injury mice produced higher levels of proinflammatory cytokines than cells from mice with radiation or burn injury alone, especially at lower dose radiation exposure levels. Interestingly, this enhanced proinflammatory phenotype induced by radiation combined injury persisted for at least 28 days after injury. In total, our data provide baseline information on differences in immune phenotype and function between radiation injury and radiation combined injury in mice. The establishment of this animal model will aid in future testing for therapeutic strategies to mitigate the immune and pathophysiological consequences of radionuclear events.
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Affiliation(s)
- G Tajima
- Department of Surgery, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA
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Portevin D, Via LE, Eum S, Young D. Natural killer cells are recruited during pulmonary tuberculosis and their ex vivo responses to mycobacteria vary between healthy human donors in association with KIR haplotype. Cell Microbiol 2012; 14:1734-44. [PMID: 22788220 PMCID: PMC3503254 DOI: 10.1111/j.1462-5822.2012.01834.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Revised: 06/13/2012] [Accepted: 06/28/2012] [Indexed: 12/01/2022]
Abstract
Humans vary widely in their susceptibility to tuberculosis. While only a minority will progress to disease, the majority of healthy individuals exposed to Mycobacterium tuberculosis mount an immune response that can clear or contain the infection in a quiescent form. Using immunofluorescence on human clinical samples, we identified natural killer (NK) cells infiltrating granulomatous pulmonary lesions during active disease. In order to compare the NK cell ability to react to free mycobacteria in the context of tuberculosis infection and Mycobacterium bovis BCG vaccination, NK cells were isolated from the peripheral blood of anonymous healthy human donors, and stimulated with M. tuberculosis H37Rv or M. bovis BCG. Extracellular M. tuberculosis and M. bovis BCG could equally trigger the release of IFNγ and TNFα from NK cells in the presence of IL-2. However, we found that this response varied 1000-fold between individuals (n = 52), with differences in KIR haplotype providing a significant criterion to distinguish between low and high responders. Our findings suggest that variations at the KIR locus and therefore of the NK cell repertoire may affect cytokine production in response to mycobacteria and we propose that this innate variability couldsustain different levels of susceptibility to M. tuberculosis infection.
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Affiliation(s)
- Damien Portevin
- Division of Mycobacterial Research, MRC National Institute for Medical Research, The Ridgeway, Mill Hill, London, UK.
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Souza-Fonseca-Guimaraes F, Parlato M, Philippart F, Misset B, Cavaillon JM, Adib-Conquy M. Toll-like receptors expression and interferon-γ production by NK cells in human sepsis. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2012; 16:R206. [PMID: 23098236 PMCID: PMC3682310 DOI: 10.1186/cc11838] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Accepted: 10/23/2012] [Indexed: 12/19/2022]
Abstract
Introduction During the course of infection, natural killer (NK) cells contribute to innate immunity by producing cytokines, particularly interferon-gamma (IFN-γ). In addition to their beneficial effects against infection, NK cells may play a detrimental role during systemic inflammation, causing lethality during sepsis. Little is known on the immune status of NK cells in patients with systemic inflammatory response syndrome (SIRS) or sepsis in terms of cell surface markers expression and IFN-γ production. Methods We investigated 27 sepsis patients and 11 patients with non-infectious SIRS. CD56bright and CD56dim NK cell subsets were identified by flow cytometry and Toll-like receptor (TLR)2, TLR4, TLR9, CX3CR1, CD16 and CD69 expression were analyzed, as well as ex vivo IFN-γ production by NK cells in whole blood samples. Results We first showed that in NK cells from healthy controls, TLR2 and TLR4 expression is mainly intracellular, similarly to TLR9. Intracellular levels of TLR2 and TLR4, in both CD56bright and CD56dim NK cell subsets from sepsis patients, were increased compared to healthy subjects. In addition, the percentage of CD69+ cells was higher among NK cells of sepsis patients. No difference was observed for TLR9, CX3CR1, and CD16 expression. The ex vivo stimulation by TLR4 or TLR9 agonists, or whole bacteria in synergy with accessory cytokines (IL-15+IL-18), resulted in significant production of IFN-γ by NK cells of healthy controls. In contrast, for SIRS and sepsis patients this response was dramatically reduced. Conclusions This study reports for the first time an intracellular expression of TLR2 and TLR4 in human NK cells. Surface TLR4 expression allows discriminating sepsis and SIRS. Furthermore, during these pathologies, NK cells undergo an alteration of their immune status characterized by a profound reduction of their capacity to release IFN-γ.
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Souza-Fonseca-Guimaraes F, Parlato M, Philippart F, Misset B, Cavaillon JM, Adib-Conquy M. Natural killer cell status and tolerance in mouse and human bacterial sepsis. Crit Care 2012. [PMCID: PMC3504885 DOI: 10.1186/cc11771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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