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Xin Y, Xiong S, Zhou L, Lin X. Activation of leukotriene B 4 receptor 1 is a prerequisite for complement receptor 3-mediated antifungal responses of neutrophils. Cell Mol Immunol 2024; 21:245-259. [PMID: 38297112 PMCID: PMC10901876 DOI: 10.1038/s41423-024-01130-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 12/31/2023] [Indexed: 02/02/2024] Open
Abstract
Invasive fungal infections are life-threatening, and neutrophils are vital cells of the innate immune system that defend against them. The role of LTA4H-LTB4-BLT1 axis in regulation of neutrophil responses to fungal infection remains poorly understood. Here, we demonstrated that the LTA4H-LTB4-BLT1 axis protects the host against Candida albicans and Aspergillus fumigatus, but not Cryptococcus neoformans infection, by regulating the antifungal activity of neutrophils. Our results show that deleting Lta4h or Blt1 substantially impairs the fungal-specific phagocytic capacity of neutrophils. Moreover, defective activation of the spleen tyrosine kinase (Syk) and extracellular signal-related kinase (ERK1/2) pathways in neutrophils accompanies this impairment. Mechanistically, BLT1 regulates CR3-mediated, β-1,3-glucan-induced neutrophil phagocytosis, while a physical interaction with CR3 with slight influence on its dynamics is observed. Our findings thus demonstrate that the LTA4H-LTB4-BLT1 axis is essential for the phagocytic function of neutrophils in host antifungal immune response against Candida albicans and Aspergillus fumigatus.
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Affiliation(s)
- Yan Xin
- Institute for Immunology and School of Medicine, Tsinghua University, 100084, Beijing, China
- Tsinghua University-Peking University Center for Life Sciences, 100084, Beijing, China
| | - Sihan Xiong
- Institute for Immunology and School of Medicine, Tsinghua University, 100084, Beijing, China
| | - Linghong Zhou
- Department of Infectious Diseases, Shanghai Key Laboratory of Infectious Diseases and Biosafety Emergency Response, National Medical Center for Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, 200040, China
| | - Xin Lin
- Institute for Immunology and School of Medicine, Tsinghua University, 100084, Beijing, China.
- Tsinghua University-Peking University Center for Life Sciences, 100084, Beijing, China.
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Wang Q, Ruan Z, Jing L, Guo Z, Zhang X, Liu J, Tian L, Sun W, Song S, Hong JS, Shih YYI, Hou L, Wang Q. Complement receptor 3-mediated neurotoxic glial activation contributes to rotenone-induced cognitive decline in mice. Ecotoxicol Environ Saf 2023; 266:115550. [PMID: 37832486 PMCID: PMC10807506 DOI: 10.1016/j.ecoenv.2023.115550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 10/02/2023] [Accepted: 10/04/2023] [Indexed: 10/15/2023]
Abstract
Microglia-mediated chronic neuroinflammation has been associated with cognitive decline induced by rotenone, a well-known neurotoxic pesticide used in agriculture. However, the mechanisms remain unclear. This work aimed to elucidate the role of complement receptor 3 (CR3), a highly expressed receptor in microglia, in cognitive deficits induced by rotenone. Rotenone up-regulated the expression of CR3 in the hippocampus and cortex area of mice. CR3 deficiency markedly ameliorated rotenone-induced cognitive impairments, neurodegeneration and phosphorylation (Ser129) of α-synuclein in mice. CR3 deficiency also attenuated rotenone-stimulated microglial M1 activation. In microglial cells, siRNA-mediated knockdown of CR3 impeded, while CR3 activation induced by LL-37 exacerbated, rotenone-induced microglial M1 activation. Mechanistically, CR3 deficiency blocked rotenone-induced activation of nuclear factor κB (NF-κB), signal transducer and activator of transcription 1 (STAT1) and STAT3 signaling pathways. Pharmacological inhibition of NF-κB or STAT3 but not STAT1 was confirmed to suppress microglial M1 activation elicited by rotenone. Further study revealed that CR3 deficiency or knockdown also reduced rotenone-induced expression of C3, an A1 astrocyte marker, and production of microglial C1q, TNFα and IL-1α, a cocktail for activated microglia to induce neurotoxic A1 astrocytes, via NF-κB and STAT3 pathways. Finally, a small molecule modulator of CR3 efficiently mitigated rotenone-elicited cognitive deficits in mice even administered after the establishment of cognitive dysfunction. Taken together, our findings demonstrated that CR3 is a key factor in mediating neurotoxic glial activation and subsequent cognitive impairments in rotenone-treated mice, giving novel insights into the immunopathogenesis of cognitive impairments in pesticide-related Parkinsonism.
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Affiliation(s)
- Qinghui Wang
- School of Public Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
- Department of Anesthesiology, Affiliated Zhongshan Hospital of Dalian University, Dalian, 116023, China
| | - Zhengzheng Ruan
- School of Public Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Lu Jing
- School of Public Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Ziyang Guo
- School of Public Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Xiaomeng Zhang
- Neuropharmacology Section, Neurobiology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
| | - Jianing Liu
- School of Public Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Lu Tian
- School of Public Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Wei Sun
- School of Public Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Sheng Song
- Biomedical Research Imaging Center, University of North Caroline at Chapel Hill, Chapel Hill, NC, USA
| | - Jau-Shyong Hong
- Neuropharmacology Section, Neurobiology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
| | - Yen-Yu Ian Shih
- Biomedical Research Imaging Center, University of North Caroline at Chapel Hill, Chapel Hill, NC, USA
| | - Liyan Hou
- Dalian Medical University Library, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
| | - Qingshan Wang
- School of Public Health, Dalian Medical University, No. 9 W. Lvshun South Road, Dalian 116044, China
- National-Local Joint Engineering Research Center for Drug-Research and Development (R & D) of Neurodegenerative Diseases, Dalian Medical University, Dalian 116044, China
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Moerings BGJ, van Bergenhenegouwen J, Furber M, Abbring S, Schols HA, Witkamp RF, Govers C, Mes JJ. Dectin-1b activation by arabinoxylans induces trained immunity in human monocyte-derived macrophages. Int J Biol Macromol 2022:S0141-8130(22)00778-4. [PMID: 35447262 DOI: 10.1016/j.ijbiomac.2022.04.071] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 04/08/2022] [Accepted: 04/09/2022] [Indexed: 01/21/2023]
Abstract
Arabinoxylans of various structures and sources have shown to possess the ability to induce a range of immune responses in different cell types in vitro and in vivo. Although the underlying mechanisms remain to be fully established, several studies point towards the involvement of activation of pattern recognition receptors (PRRs). Activation of specific PRRs (i.e., Dectin-1 and CR3) has also been shown to play a key role in the induction of a non-specific memory response in innate immune cells, termed 'trained innate immunity'. In the current study, we assessed whether arabinoxylans are also able to induce trained innate immunity. To this end, a range of arabinoxylan preparations from different sources were tested for their physicochemical properties and their capacity to induce innate immune training and resilience. In human macrophages, rice and wheat-derived arabinoxylan preparations induced training and/or resilience effects, the extent depending on fiber particle size and solubility. Using a Dectin-1 antagonist or a CR3 antibody, it was demonstrated that arabinoxylan-induced trained immunity in macrophages is mainly dependent on Dectin-1b. These findings build on previous observations showing the immunomodulatory potential of arabinoxylans as biological response modifiers and open up promising avenues for their use as health promoting ingredients.
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Han X, Su X, Li Z, Liu Y, Wang S, Zhu M, Zhang C, Yang F, Zhao J, Li X, Chen F, Han L. Complement receptor 3 mediates Aspergillus fumigatus internalization into alveolar epithelial cells with the increase of intracellular phosphatidic acid by activating FAK. Virulence 2021; 12:1980-1996. [PMID: 34338598 PMCID: PMC8331038 DOI: 10.1080/21505594.2021.1958042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Complement receptor 3 (CD11b/CD18) is an important receptor that mediates adhesion, phagocytosis and chemotaxis in various immunocytes. The conidia of the medically-important pathogenic fungus, Aspergillus fumigatus can be internalized into alveolar epithelial cells to disseminate its infection in immunocompromised host; however, the role of CR3 in this process is poorly understood. In the present study, we investigated the potential role of CR3 on A. fumigatus internalization into type II alveolar epithelial cells and its effect on host intracellular PA content induced by A. fumigatus. We found that CR3 is expressed in alveolar epithelial cells and that human serum and bronchoalveolar lavage fluid (BALF) could improve A. fumigatus conidial internalization into A549 type II alveolar epithelial cell line and mouse primary alveolar epithelial cells, which were significantly inhibited by the complement C3 quencher and CD11b-blocking antibody. Serum-opsonization of swollen conidia, but not resting conidia led to the increase of cellular phosphatidic acid (PA) in A549 cells during infection. Moreover, both conidial internalization and induced PA production were interfered by CD11b-blocking antibody and dependent on FAK activity, but not Syk in alveolar epithelial cells. Overall, our results revealed that CR3 is a critical modulator of Aspergillus fumigatus internalization into alveolar epithelial cells.
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Affiliation(s)
- Xuelin Han
- Department for Disinfection and Infection Control, Chinese PLA Center for Disease Control and Prevention, Beijing, China
| | - Xueting Su
- Department for Disinfection and Infection Control, Chinese PLA Center for Disease Control and Prevention, Beijing, China
| | - Zhiqian Li
- Department for Disinfection and Infection Control, Chinese PLA Center for Disease Control and Prevention, Beijing, China.,Department of Laboratory Medicine & Blood Transfusion, the 907th Hospital, Fujian, Nanping, China
| | - Yanxi Liu
- Department for Disinfection and Infection Control, Chinese PLA Center for Disease Control and Prevention, Beijing, China
| | - Shuo Wang
- Department for Disinfection and Infection Control, Chinese PLA Center for Disease Control and Prevention, Beijing, China.,Northwest Institute of Plateau Biology, Chinese Academy of Science, Qinghai, Xining, China
| | - Miao Zhu
- Department for Disinfection and Infection Control, Chinese PLA Center for Disease Control and Prevention, Beijing, China
| | - Changjian Zhang
- Department for Disinfection and Infection Control, Chinese PLA Center for Disease Control and Prevention, Beijing, China.,Central Laboratory of the sixth medical center of PLA general hospital, Beijing, China
| | - Fan Yang
- Department for Disinfection and Infection Control, Chinese PLA Center for Disease Control and Prevention, Beijing, China
| | - Jingya Zhao
- Department for Disinfection and Infection Control, Chinese PLA Center for Disease Control and Prevention, Beijing, China
| | - Xianping Li
- State Key Laboratory for Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Fangyan Chen
- Department for Disinfection and Infection Control, Chinese PLA Center for Disease Control and Prevention, Beijing, China
| | - Li Han
- Department for Disinfection and Infection Control, Chinese PLA Center for Disease Control and Prevention, Beijing, China
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Gupta R, Gant VA, Williams B, Enver T. Increased Complement Receptor-3 levels in monocytes and granulocytes distinguish COVID-19 patients with pneumonia from those with mild symptoms. Int J Infect Dis 2020; 99:381-385. [PMID: 32771640 PMCID: PMC7836814 DOI: 10.1016/j.ijid.2020.08.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 07/30/2020] [Accepted: 08/02/2020] [Indexed: 12/18/2022] Open
Abstract
COVID-19 lung failure specifically correlates with a marker of peripheral blood cell immune activation. Our findings suggest its use as a prognostic test for hypoxia. Novel insight into COVID-19 related lung damage prompts possibilities for new treatment strategies.
Background The reasons why some patients with COVID-19 develop pneumonia and others do not are unclear. To better understand this, we used multiparameter flow cytometry to profile circulating leukocytes from non-immunocompromised adult patients with PCR-proven COVID-19 and specifically compared those with mild symptoms with those who had developed pneumonia. Methods Using clinically validated antibody panels we studied leukocytes from 29 patients with PCR-proven COVID-19. Ten were hypoxic requiring ventilatory support, eleven were febrile but otherwise well, and eight were convalescing having previously required ventilatory support. Additionally, we analysed patients who did not have COVID-19 but received ventilatory support for other reasons. We examined routine Full Blood Count (FBC) specimens that were surplus to routine diagnostic requirements; normal ranges were established in a historic group of healthy volunteers. Findings We observed striking and unexpected differences in cells of the innate immune system. Levels of CD11b and CD18, which together comprise Complement Receptor 3 (CR3), were increased in granulocytes and monocytes from hypoxic COVID-19 patients, but not in those with COVID-19 who remained well, or in those without COVID-19 but ventilated for other reasons. Granulocyte and monocyte numbers were unchanged, however Natural Killer (NK) cell numbers were two-fold higher than normal in COVID-19 patients who remained well. Interpretation CR3 is central to leukocyte activation and subsequent cytokine release in response to infection. It is also a fibrinogen receptor, and its over-expression in granulocytes and monocytes of patients with respiratory failure tables it as a candidate effector of both the thrombotic and inflammatory features of COVID-19 pneumonia, and both a biomarker of impending respiratory failure and potential therapeutic target. NK cells are innate immune cells that retain immunological memory. Rapid expansion of memory NK cells targeting common antigens shared with other Coronaviruses may explain why most patients with COVID-19 do not develop respiratory complications. Understanding the innate immune response to SARS-CoV-may uncover why most infected individuals experience mild symptoms, and inform a preventive approach to COVID-19 pneumonia in the future.
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Affiliation(s)
- Rajeev Gupta
- Stem Cell Group, UCL Cancer Institute, University College London, London, WC1E 6BT, UK; Manual Blood Sciences, Health Services Laboratories, The Halo Building, 1 Mabledon Place, London WC1H 9AX, UK
| | - Vanya Alasdair Gant
- Department of Microbiology, UCLH NHS Hospitals NHS Foundation Trust, 250 Euston Road, London NW1 2PG, UK.
| | - Bryan Williams
- Department of Medicine, UCLH NHS Hospitals Foundation Trust, 250 Euston Road, London NW1 2 PG, UK
| | - Tariq Enver
- Stem Cell Group, UCL Cancer Institute, University College London, London, WC1E 6BT, UK
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