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Van Holm W, Zayed N, Lauwens K, Saghi M, Axelsson J, Aktan MK, Braem A, Simoens K, Vanbrabant L, Proost P, Van Holm B, Maes P, Boon N, Bernaerts K, Teughels W. Oral Biofilm Composition, Dissemination to Keratinocytes, and Inflammatory Attenuation Depend on Probiotic and Synbiotic Strain Specificity. Probiotics Antimicrob Proteins 2024:10.1007/s12602-024-10253-z. [PMID: 38619794 DOI: 10.1007/s12602-024-10253-z] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/01/2024] [Indexed: 04/16/2024]
Abstract
Several inflammatory diseases are characterized by a disruption in the equilibrium between the host and its microbiome. Due to the increase in resistance, the use of antibiotics for the widespread, nonspecific killing of microorganisms is at risk. Pro-microbial approaches focused on stimulating or introducing beneficial species antagonistic toward pathobionts may be a viable alternative for restoring the host-microbiome equilibrium. Unfortunately, not all potential probiotic or synbiotic species and even subspecies (to strain level) are equally effective for the designated pathology, leading to conflicting accounts of their efficacy. To assess the extent of these species- and strain-specific effects, 13 probiotic candidates were evaluated for their probiotic and synbiotic potential with glycerol on in vitro oral biofilms, dissemination from biofilms to keratinocytes, and anti-inflammatory activity. Species- and strain-specific effects and efficacies were observed in how they functioned as probiotics or synbiotics by influencing oral pathobionts and commensals within biofilms and affected the dissemination of pathobionts to keratinocytes, ranging from ineffective strains to strains that reduced pathobionts by 3 + log. In addition, a minority of the candidates exhibited the ability to mitigate the inflammatory response of LPS-stimulated monocytes. For a comprehensive assessment of probiotic therapy for oral health, a judicious selection of fully characterized probiotic strains that are specifically tailored to the designated pathology is required. This approach aims to challenge the prevailing perception of probiotics, shifting the focus away from "form over function." Rather than using unproven, hypothetical probiotic strains from known genera or species, one should choose strains that are actually functional in resolving the desired pathology before labelling them probiotics.
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Affiliation(s)
- Wannes Van Holm
- KU Leuven, Department of Oral Health Sciences, Periodontology and Oral Microbiology, B-3000, Leuven, Belgium
- Ghent University (UGent), Centre for Microbial Ecology and Technology (CMET), Ghent, Belgium
| | - Naiera Zayed
- KU Leuven, Department of Oral Health Sciences, Periodontology and Oral Microbiology, B-3000, Leuven, Belgium
- Ghent University (UGent), Centre for Microbial Ecology and Technology (CMET), Ghent, Belgium
- Faculty of Pharmacy, Menoufia University, Shebeen El-Kom, Egypt
| | - Katalina Lauwens
- KU Leuven, Department of Oral Health Sciences, Periodontology and Oral Microbiology, B-3000, Leuven, Belgium
| | - Mehraveh Saghi
- KU Leuven, Department of Oral Health Sciences, Periodontology and Oral Microbiology, B-3000, Leuven, Belgium
| | | | - Merve Kübra Aktan
- KU Leuven, Department of Materials Engineering (MTM), Biomaterials and Tissue Engineering, B-3000, Leuven, Belgium
| | - Annabel Braem
- KU Leuven, Department of Materials Engineering (MTM), Biomaterials and Tissue Engineering, B-3000, Leuven, Belgium
| | - Kenneth Simoens
- KU Leuven, Department of Chemical Engineering, Bio- and Chemical Systems Technology, B-3000, Leuven, Belgium
| | - Lotte Vanbrabant
- KU Leuven, Department of Microbiology, Immunology and Transplantation, Research Group Immunity and Inflammation, B-3000, Leuven, Belgium
| | - Paul Proost
- KU Leuven, Department of Microbiology, Immunology and Transplantation, Research Group Immunity and Inflammation, B-3000, Leuven, Belgium
| | - Bram Van Holm
- KU Leuven, Department of Microbiology, Immunology and Transplantation, Laboratory of Clinical and Epidemiological Virology, B-3000, Leuven, Belgium
| | - Piet Maes
- KU Leuven, Department of Microbiology, Immunology and Transplantation, Laboratory of Clinical and Epidemiological Virology, B-3000, Leuven, Belgium
| | - Nico Boon
- Ghent University (UGent), Centre for Microbial Ecology and Technology (CMET), Ghent, Belgium
| | - Kristel Bernaerts
- KU Leuven, Department of Chemical Engineering, Bio- and Chemical Systems Technology, B-3000, Leuven, Belgium
| | - Wim Teughels
- KU Leuven, Department of Oral Health Sciences, Periodontology and Oral Microbiology, B-3000, Leuven, Belgium.
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Dillemans L, Yu K, De Zutter A, Noppen S, Gouwy M, Berghmans N, Verhallen L, De Bondt M, Vanbrabant L, Brusselmans S, Martens E, Schols D, Verschueren P, Rosenkilde MM, Marques PE, Struyf S, Proost P. Natural carboxyterminal truncation of human CXCL10 attenuates glycosaminoglycan binding, CXCR3A signaling and lymphocyte chemotaxis, while retaining angiostatic activity. Cell Commun Signal 2024; 22:94. [PMID: 38308278 PMCID: PMC10835923 DOI: 10.1186/s12964-023-01453-1] [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: 08/25/2023] [Accepted: 12/21/2023] [Indexed: 02/04/2024] Open
Abstract
BACKGROUND Interferon-γ-inducible protein of 10 kDa (IP-10/CXCL10) is a dual-function CXC chemokine that coordinates chemotaxis of activated T cells and natural killer (NK) cells via interaction with its G protein-coupled receptor (GPCR), CXC chemokine receptor 3 (CXCR3). As a consequence of natural posttranslational modifications, human CXCL10 exhibits a high degree of structural and functional heterogeneity. However, the biological effect of natural posttranslational processing of CXCL10 at the carboxy (C)-terminus has remained partially elusive. We studied CXCL10(1-73), lacking the four endmost C-terminal amino acids, which was previously identified in supernatant of cultured human fibroblasts and keratinocytes. METHODS Relative levels of CXCL10(1-73) and intact CXCL10(1-77) were determined in synovial fluids of patients with rheumatoid arthritis (RA) through tandem mass spectrometry. The production of CXCL10(1-73) was optimized through Fmoc-based solid phase peptide synthesis (SPPS) and a strategy to efficiently generate human CXCL10 proteoforms was introduced. CXCL10(1-73) was compared to intact CXCL10(1-77) using surface plasmon resonance for glycosaminoglycan (GAG) binding affinity, assays for cell migration, second messenger signaling downstream of CXCR3, and flow cytometry of CHO cells and primary human T lymphocytes and endothelial cells. Leukocyte recruitment in vivo upon intraperitoneal injection of CXCL10(1-73) was also evaluated. RESULTS Natural CXCL10(1-73) was more abundantly present compared to intact CXCL10(1-77) in synovial fluids of patients with RA. CXCL10(1-73) had diminished affinity for GAG including heparin, heparan sulfate and chondroitin sulfate A. Moreover, CXCL10(1-73) exhibited an attenuated capacity to induce CXCR3A-mediated signaling, as evidenced in calcium mobilization assays and through quantification of phosphorylated extracellular signal-regulated kinase-1/2 (ERK1/2) and protein kinase B/Akt. Furthermore, CXCL10(1-73) incited significantly less primary human T lymphocyte chemotaxis in vitro and peritoneal ingress of CXCR3+ T lymphocytes in mice. In contrast, loss of the four endmost C-terminal residues did not affect the inhibitory properties of CXCL10 on migration, proliferation, wound closure, phosphorylation of ERK1/2, and sprouting of human microvascular endothelial cells. CONCLUSION Our study shows that the C-terminal residues Lys74-Pro77 of CXCL10 are important for GAG binding, signaling through CXCR3A, T lymphocyte chemotaxis, but dispensable for angiostasis.
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Affiliation(s)
- Luna Dillemans
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Karen Yu
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Alexandra De Zutter
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Sam Noppen
- Laboratory of Virology and Chemotherapy, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Herestraat 49 Box 1042, Leuven, Belgium
| | - Mieke Gouwy
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Nele Berghmans
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Lisa Verhallen
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
- Laboratory of Molecular Pharmacology, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200, Copenhagen, Denmark
| | - Mirre De Bondt
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Lotte Vanbrabant
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Stef Brusselmans
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Erik Martens
- Laboratory of Immunobiology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Dominique Schols
- Laboratory of Virology and Chemotherapy, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Herestraat 49 Box 1042, Leuven, Belgium
| | - Patrick Verschueren
- Skeletal Biology and Engineering Research Center, Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Mette M Rosenkilde
- Laboratory of Molecular Pharmacology, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200, Copenhagen, Denmark
| | - Pedro Elias Marques
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Sofie Struyf
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Paul Proost
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium.
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Ganseman E, Goossens J, Blanter M, Jonckheere AC, Bergmans N, Vanbrabant L, Gouwy M, Ronsmans S, Vandenbroeck S, Dupont LJ, Vanoirbeek J, Bullens DMA, Breynaert C, Proost P, Schrijvers R. Frequent Allergic Sensitization to Farmed Edible Insects in Exposed Employees. J Allergy Clin Immunol Pract 2023; 11:3732-3741.e10. [PMID: 37543086 DOI: 10.1016/j.jaip.2023.07.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 06/29/2023] [Accepted: 07/26/2023] [Indexed: 08/07/2023]
Abstract
BACKGROUND Exposure to insects used in pet food, scientific research, or live fish bait can cause an occupational allergy. The recent shift toward enhanced insect production for human consumption and animal feed will likely expose more employees. OBJECTIVE To investigate sensitization and symptoms in employees exposed to edible insects in Flanders. METHODS Fifteen insect-exposed employees were recruited and sensitization was explored by skin prick test, basophil activation test, and immunoblotting. Lung function, FeNO, histamine provocation, and sputum induction were studied. Airborne dust sampling was performed and proteins were studied by silver stain and immunoblotting. RESULTS Sixty percent of employees self-reported upper respiratory tract symptoms related to insect exposure. Ten employees (71.4%) had a positive histamine provocation test concentration causing a 20% drop in FEV1 less than 8 mg/mL and four (26.7%) had FeNO levels above 25 ppb. Four employees (30.7%) had a positive skin prick test for at least one insect, and seven (58.3%) had a positive basophil activation test. In eight participants with insect sensitization, four (50%) had co-occurring house dust mite sensitization. Two participants had strong IgE binding to a 50-kDa migratory locust allergen, one to a 25-kDa mealworm allergen, and one to mealworm α-amylase. In one center, facility adjustment resulted in a substantial decrease in the inhalable dust fraction. CONCLUSIONS Insect exposure leads to high levels of sensitization among employees. Most employees reported symptoms of the upper respiratory system, and two-thirds of employees had bronchial hyperreactivity. Prevention and health surveillance will be important in the developing insect-rearing industry.
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Affiliation(s)
- Eva Ganseman
- Department of Microbiology, Immunology, and Transplantation, Allergy and Clinical Immunology Research Group, KU Leuven, Leuven, Belgium; Department of Microbiology, Immunology, and Transplantation, Rega Institute, Laboratory of Molecular Immunology, KU Leuven, Leuven, Belgium
| | - Janne Goossens
- Department of Microbiology, Immunology, and Transplantation, Allergy and Clinical Immunology Research Group, KU Leuven, Leuven, Belgium
| | - Marfa Blanter
- Department of Microbiology, Immunology, and Transplantation, Rega Institute, Laboratory of Molecular Immunology, KU Leuven, Leuven, Belgium
| | - Anne-Charlotte Jonckheere
- Department of Microbiology, Immunology, and Transplantation, Allergy and Clinical Immunology Research Group, KU Leuven, Leuven, Belgium
| | - Nele Bergmans
- Department of Microbiology, Immunology, and Transplantation, Rega Institute, Laboratory of Molecular Immunology, KU Leuven, Leuven, Belgium
| | - Lotte Vanbrabant
- Department of Microbiology, Immunology, and Transplantation, Rega Institute, Laboratory of Molecular Immunology, KU Leuven, Leuven, Belgium
| | - Mieke Gouwy
- Department of Microbiology, Immunology, and Transplantation, Rega Institute, Laboratory of Molecular Immunology, KU Leuven, Leuven, Belgium
| | - Steven Ronsmans
- Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium
| | - Sofie Vandenbroeck
- Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium; IDEWE, External Service for Prevention and Protection at Work, Knowledge, Information and Research Department, Heverlee, Belgium
| | - Lieven J Dupont
- Department of Chronic Diseases and Metabolism, Laboratory of Respiratory Diseases and Thoracic Surgery, KU Leuven, Leuven, Belgium; Department of Pneumology, University Hospitals Leuven, Leuven, Belgium
| | - Jeroen Vanoirbeek
- Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium
| | - Dominique M A Bullens
- Department of Microbiology, Immunology, and Transplantation, Allergy and Clinical Immunology Research Group, KU Leuven, Leuven, Belgium; Department of Pediatrics., University Hospitals Leuven, Leuven, Belgium
| | - Christine Breynaert
- Department of Microbiology, Immunology, and Transplantation, Allergy and Clinical Immunology Research Group, KU Leuven, Leuven, Belgium; Department General Internal Medicine-Allergy and Clinical Immunology, University Hospitals Leuven, Leuven, Belgium
| | - Paul Proost
- Department of Microbiology, Immunology, and Transplantation, Rega Institute, Laboratory of Molecular Immunology, KU Leuven, Leuven, Belgium
| | - Rik Schrijvers
- Department of Microbiology, Immunology, and Transplantation, Allergy and Clinical Immunology Research Group, KU Leuven, Leuven, Belgium; Department General Internal Medicine-Allergy and Clinical Immunology, University Hospitals Leuven, Leuven, Belgium.
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Blanter M, Cambier S, De Bondt M, Vanbrabant L, Pörtner N, Abouelasrar Salama S, Metzemaekers M, Marques PE, Struyf S, Proost P, Gouwy M. Method Matters: Effect of Purification Technology on Neutrophil Phenotype and Function. Front Immunol 2022; 13:820058. [PMID: 35222394 PMCID: PMC8866851 DOI: 10.3389/fimmu.2022.820058] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [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] [Received: 11/22/2021] [Accepted: 01/19/2022] [Indexed: 12/14/2022] Open
Abstract
Neutrophils are the most abundant leukocytes in human blood and the first cells responding to infection and injury. Due to their limited ex vivo lifespan and the impossibility to cryopreserve or expand them in vitro, neutrophils need to be purified from fresh blood for immediate use in experiments. Importantly, neutrophil purification methods may artificially modify the phenotype and functional characteristics of the isolated cells. The aim of this study was to expose the effects of ‘classical’ density-gradient purification versus the more expensive but faster immunomagnetic isolation on neutrophil phenotype and functionality. We found that in the absence of inflammatory stimuli, density-gradient-derived neutrophils showed increased polarization responses as well as enhanced release of reactive oxygen species (ROS), neutrophil extracellular traps (NETs) and granular proteins compared to cells derived from immunomagnetic isolation, which yields mostly quiescent neutrophils. Upon exposure to pro-inflammatory mediators, immunomagnetic isolation-derived neutrophils were significantly more responsive in polarization, ROS production, phagocytosis, NETosis and degranulation assays, in comparison to density-gradient-derived cells. We found no difference in chemotactic response in Multiscreen and under-agarose migration assays, but Boyden assays showed reduced chemotaxis of immunomagnetic isolation-derived neutrophils. Finally, we confirmed that density-gradient purification induces artificial activation of neutrophils, evidenced by e.g. higher expression of CD66b, formyl peptide receptor 1 (FPR1) and CD35, and the appearance of a separate neutrophil population expressing surface molecules atypical for neutrophils (e.g. CXCR3, MHC-II and CD14). Based on these results, we recommend using immunomagnetic separation of neutrophils for studying neutrophil polarization, phagocytosis, ROS production, degranulation and NETosis, whereas for Boyden chemotaxis assays, the density-gradient purification is more suitable.
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Affiliation(s)
- Marfa Blanter
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Seppe Cambier
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Mirre De Bondt
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Lotte Vanbrabant
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Noëmie Pörtner
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Sara Abouelasrar Salama
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Mieke Metzemaekers
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Pedro Elias Marques
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Sofie Struyf
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Paul Proost
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
| | - Mieke Gouwy
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute, KU Leuven, Leuven, Belgium
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Abu El-Asrar AM, Ahmad A, Nawaz MI, Siddiquei MM, De Zutter A, Vanbrabant L, Gikandi PW, Opdenakker G, Struyf S. Tissue Inhibitor of Metalloproteinase-3 Ameliorates Diabetes-Induced Retinal Inflammation. Front Physiol 2022; 12:807747. [PMID: 35082694 PMCID: PMC8784736 DOI: 10.3389/fphys.2021.807747] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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] [Received: 11/03/2021] [Accepted: 12/10/2021] [Indexed: 12/18/2022] Open
Abstract
Purpose: Endogenous tissue inhibitor of matrix metalloproteinase-3 (TIMP-3) has powerful regulatory effects on inflammation and angiogenesis. In this study, we investigated the role of TIMP-3 in regulating inflammation in the diabetic retina. Methods: Vitreous samples from patients with proliferative diabetic retinopathy (PDR) and non-diabetic patients were subjected to Western blot analysis. Streptozotocin-treated rats were used as a preclinical diabetic retinopathy (DR) model. Blood-retinal barrier (BRB) breakdown was assessed with fluorescein isothiocyanate (FITC)-conjugated dextran. Rat retinas, human retinal microvascular endothelial cells (HRMECs) and human retinal Müller glial cells were studied by Western blot analysis and ELISA. Adherence of human monocytes to HRMECs was assessed and in vitro angiogenesis assays were performed. Results: Tissue inhibitor of matrix metalloproteinase-3 in vitreous samples was largely glycosylated. Intravitreal injection of TIMP-3 attenuated diabetes-induced BRB breakdown. This effect was associated with downregulation of diabetes-induced upregulation of the p65 subunit of NF-κB, intercellular adhesion molecule-1 (ICAM-1), and vascular endothelial growth factor (VEGF), whereas phospho-ERK1/2 levels were not altered. In Müller cell cultures, TIMP-3 significantly attenuated VEGF upregulation induced by high-glucose (HG), the hypoxia mimetic agent cobalt chloride (CoCl2) and TNF-α and attenuated MCP-1 upregulation induced by CoCl2 and TNF-α, but not by HG. TIMP-3 attenuated HG-induced upregulation of phospho-ERK1/2, caspase-3 and the mature form of ADAM17, but not the levels of the p65 subunit of NF-κB and the proform of ADAM17 in Müller cells. TIMP-3 significantly downregulated TNF-α-induced upregulation of ICAM-1 and VCAM-1 in HRMECs. Accordingly, TIMP-3 significantly decreased spontaneous and TNF-α- and VEGF-induced adherence of monocytes to HRMECs. Finally, TIMP-3 significantly attenuated VEGF-induced migration, chemotaxis and proliferation of HRMECs. Conclusion:In vitro and in vivo data point to anti-inflammatory and anti-angiogenic effects of TIMP-3 and support further studies for its applications in the treatment of DR.
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Affiliation(s)
- Ahmed M Abu El-Asrar
- Department of Ophthalmology, College of Medicine, King Saud University, Riyadh, Saudi Arabia.,Dr. Nasser Al-Rashid Research Chair in Ophthalmology, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Ajmal Ahmad
- Department of Ophthalmology, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Mohd Imtiaz Nawaz
- Department of Ophthalmology, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | | | - Alexandra De Zutter
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Leuven, Belgium
| | - Lotte Vanbrabant
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Leuven, Belgium
| | - Priscilla W Gikandi
- Department of Ophthalmology, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Ghislain Opdenakker
- Department of Ophthalmology, College of Medicine, King Saud University, Riyadh, Saudi Arabia.,Department of Microbiology and Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, KU Leuven, and University Hospitals UZ Gasthuisberg, Leuven, Belgium
| | - Sofie Struyf
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, KU Leuven, Leuven, Belgium
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Blanter M, Cockx M, Wittebols L, Abouelasrar Salama S, De Bondt M, Berghmans N, Pörtner N, Vanbrabant L, Lorent N, Gouwy M, Boon M, Struyf S. Sputum from patients with primary ciliary dyskinesia contains high numbers of dysfunctional neutrophils and inhibits efferocytosis. Respir Res 2022; 23:359. [PMID: 36528664 PMCID: PMC9758951 DOI: 10.1186/s12931-022-02280-7] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 12/05/2022] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Primary ciliary dyskinesia (PCD) is a genetic disorder characterized by recurrent airway infection and inflammation. There is no cure for PCD and to date there are no specific treatments available. Neutrophils are a crucial part of the immune system and are known to be dysfunctional in many inflammatory diseases. So far, the role of the neutrophils in PCD airways is largely unknown. The purpose of this study was to investigate the phenotype and function of airway neutrophils in PCD, and compare them to blood neutrophils. METHODS Paired peripheral blood and spontaneously expectorated sputum samples from patients with PCD (n = 32) and a control group of patients with non-PCD, non-cystic fibrosis bronchiectasis (n = 5) were collected. The expression of neutrophil-specific surface receptors was determined by flow cytometry. Neutrophil function was assessed by measuring the extent of actin polymerization, production of reactive oxygen species (ROS) and release of neutrophil extracellular traps (NETs) in response to activating stimuli. RESULTS Sputum neutrophils displayed a highly activated phenotype and were unresponsive to stimuli that would normally induce ROS production, actin polymerization and the expulsion of NETs. In addition, PCD sputum displayed high activity of neutrophil elastase, and impaired the efferocytosis by healthy donor macrophages. CONCLUSIONS Sputum neutrophils in PCD are dysfunctional and likely contribute to ongoing inflammation in PCD airways. Further research should focus on anti-inflammatory therapies and stimulation of efferocytosis as a strategy to treat PCD.
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Affiliation(s)
- Marfa Blanter
- grid.5596.f0000 0001 0668 7884Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, 3000 Leuven, Belgium
| | - Maaike Cockx
- grid.5596.f0000 0001 0668 7884Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, 3000 Leuven, Belgium
| | - Liesel Wittebols
- grid.5596.f0000 0001 0668 7884Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, 3000 Leuven, Belgium
| | - Sara Abouelasrar Salama
- grid.5596.f0000 0001 0668 7884Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, 3000 Leuven, Belgium
| | - Mirre De Bondt
- grid.5596.f0000 0001 0668 7884Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, 3000 Leuven, Belgium
| | - Nele Berghmans
- grid.5596.f0000 0001 0668 7884Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, 3000 Leuven, Belgium
| | - Noëmie Pörtner
- grid.5596.f0000 0001 0668 7884Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, 3000 Leuven, Belgium
| | - Lotte Vanbrabant
- grid.5596.f0000 0001 0668 7884Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, 3000 Leuven, Belgium
| | - Natalie Lorent
- grid.410569.f0000 0004 0626 3338Pneumology and Cystic Fibrosis Unit, Department of Pneumology, University Hospitals Leuven, 3000 Leuven, Belgium
| | - Mieke Gouwy
- grid.5596.f0000 0001 0668 7884Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, 3000 Leuven, Belgium
| | - Mieke Boon
- grid.410569.f0000 0004 0626 3338Pediatric Pneumology and Cystic Fibrosis Unit, Department of Pediatrics, University Hospitals Leuven, 3000 Leuven, Belgium
| | - Sofie Struyf
- grid.5596.f0000 0001 0668 7884Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, 3000 Leuven, Belgium
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Metzemaekers M, Cambier S, Blanter M, Vandooren J, de Carvalho AC, Malengier‐Devlies B, Vanderbeke L, Jacobs C, Coenen S, Martens E, Pörtner N, Vanbrabant L, Van Mol P, Van Herck Y, Van Aerde N, Hermans G, Gunst J, Borin A, Toledo N Pereira B, dos SP Gomes AB, Primon Muraro S, Fabiano de Souza G, S Farias A, Proenca‐Modena JL, R Vinolo MA, Marques PE, Wouters C, Wauters E, Struyf S, Matthys P, Opdenakker G, Marques RE, Wauters J, Gouwy M, Proost P. Kinetics of peripheral blood neutrophils in severe coronavirus disease 2019. Clin Transl Immunology 2021; 10:e1271. [PMID: 33968405 PMCID: PMC8082714 DOI: 10.1002/cti2.1271] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 03/08/2021] [Accepted: 03/08/2021] [Indexed: 01/08/2023] Open
Abstract
OBJECTIVES Emerging evidence of dysregulation of the myeloid cell compartment urges investigations on neutrophil characteristics in coronavirus disease 2019 (COVID-19). We isolated neutrophils from the blood of COVID-19 patients receiving general ward care and from patients hospitalised at intensive care units (ICUs) to explore the kinetics of circulating neutrophils and factors important for neutrophil migration and activation. METHODS Multicolour flow cytometry was exploited for the analysis of neutrophil differentiation and activation markers. Multiplex and ELISA technologies were used for the quantification of protease, protease inhibitor, chemokine and cytokine concentrations in plasma. Neutrophil polarisation responses were evaluated microscopically. Gelatinolytic and metalloproteinase activity in plasma was determined using a fluorogenic substrate. Co-culturing healthy donor neutrophils with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) allowed us to investigate viral replication in neutrophils. RESULTS Upon ICU admission, patients displayed high plasma concentrations of granulocyte-colony-stimulating factor (G-CSF) and the chemokine CXCL8, accompanied by emergency myelopoiesis as illustrated by high levels of circulating CD10-, immature neutrophils with reduced CXCR2 and C5aR expression. Neutrophil elastase and non-metalloproteinase-derived gelatinolytic activity were increased in plasma from ICU patients. Significantly higher levels of circulating tissue inhibitor of metalloproteinase 1 (TIMP-1) in patients at ICU admission yielded decreased total MMP proteolytic activity in blood. COVID-19 neutrophils were hyper-responsive to CXCL8 and CXCL12 in shape change assays. Finally, SARS-CoV-2 failed to replicate inside human neutrophils. CONCLUSION Our study provides detailed insights into the kinetics of neutrophil phenotype and function in severe COVID-19 patients, and supports the concept of an increased neutrophil activation state in the circulation.
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Affiliation(s)
- Mieke Metzemaekers
- Laboratory of Molecular ImmunologyDepartment of Microbiology, Immunology and TransplantationRega Institute, KU LeuvenLeuvenBelgium
| | - Seppe Cambier
- Laboratory of Molecular ImmunologyDepartment of Microbiology, Immunology and TransplantationRega Institute, KU LeuvenLeuvenBelgium
| | - Marfa Blanter
- Laboratory of Molecular ImmunologyDepartment of Microbiology, Immunology and TransplantationRega Institute, KU LeuvenLeuvenBelgium
| | - Jennifer Vandooren
- Laboratory of ImmunobiologyDepartment of Microbiology, Immunology and TransplantationRega Institute, KU LeuvenLeuvenBelgium
| | - Ana Carolina de Carvalho
- Laboratory of Molecular ImmunologyDepartment of Microbiology, Immunology and TransplantationRega Institute, KU LeuvenLeuvenBelgium
- Brazilian Center for Research in Energy and Materials ‐ CNPEMBrazilian Biosciences National LaboratoryCampinasLNBioBrazil
- Laboratory of ImmunoinflammationDepartment of Genetics, Microbiology and ImmunologyInstitute of BiologyUniversity of Campinas (UNICAMP)CampinasBrazil
| | - Bert Malengier‐Devlies
- Laboratory of ImmunobiologyDepartment of Microbiology, Immunology and TransplantationRega Institute, KU LeuvenLeuvenBelgium
| | - Lore Vanderbeke
- Laboratory of Clinical Bacteriology and MycologyDepartment of Microbiology, Immunology and TransplantationKU LeuvenLeuvenBelgium
| | - Cato Jacobs
- Laboratory for Clinical Infectious and Inflammatory DisordersDepartment of Microbiology, Immunology and TransplantationKU LeuvenLeuvenBelgium
| | - Sofie Coenen
- Division of PediatricsUniversity Hospitals LeuvenLeuvenBelgium
| | - Erik Martens
- Laboratory of ImmunobiologyDepartment of Microbiology, Immunology and TransplantationRega Institute, KU LeuvenLeuvenBelgium
| | - Noëmie Pörtner
- Laboratory of Molecular ImmunologyDepartment of Microbiology, Immunology and TransplantationRega Institute, KU LeuvenLeuvenBelgium
| | - Lotte Vanbrabant
- Laboratory of Molecular ImmunologyDepartment of Microbiology, Immunology and TransplantationRega Institute, KU LeuvenLeuvenBelgium
| | - Pierre Van Mol
- Laboratory of Translational GeneticsDepartment of Human GeneticsVIB‐KU LeuvenLeuvenBelgium
| | - Yannick Van Herck
- Laboratory of Experimental OncologyDepartment of OncologyKU LeuvenLeuvenBelgium
| | - Nathalie Van Aerde
- Laboratory of Intensive Care MedicineDepartment of Cellular and Molecular MedicineKU LeuvenLeuvenBelgium
| | - Greet Hermans
- Laboratory of Intensive Care MedicineDepartment of Cellular and Molecular MedicineKU LeuvenLeuvenBelgium
| | - Jan Gunst
- Laboratory of Intensive Care MedicineDepartment of Cellular and Molecular MedicineKU LeuvenLeuvenBelgium
| | - Alexandre Borin
- Brazilian Center for Research in Energy and Materials ‐ CNPEMBrazilian Biosciences National LaboratoryCampinasLNBioBrazil
| | - Bruna Toledo N Pereira
- Laboratory of ImmunoinflammationDepartment of Genetics, Microbiology and ImmunologyInstitute of BiologyUniversity of Campinas (UNICAMP)CampinasBrazil
| | - Arilson Bernardo dos SP Gomes
- Laboratory of ImmunoinflammationDepartment of Genetics, Microbiology and ImmunologyInstitute of BiologyUniversity of Campinas (UNICAMP)CampinasBrazil
| | - Stéfanie Primon Muraro
- Laboratory Emerging VirusesDepartment of Genetics, Microbiology and ImmunologyInstitute of BiologyUniversity of Campinas (UNICAMP)CampinasBrazil
| | - Gabriela Fabiano de Souza
- Laboratory Emerging VirusesDepartment of Genetics, Microbiology and ImmunologyInstitute of BiologyUniversity of Campinas (UNICAMP)CampinasBrazil
| | - Alessandro S Farias
- Experimental Medicine Research Cluster (EMRC)University of Campinas (UNICAMP)CampinasBrazil
| | - José Luiz Proenca‐Modena
- Laboratory Emerging VirusesDepartment of Genetics, Microbiology and ImmunologyInstitute of BiologyUniversity of Campinas (UNICAMP)CampinasBrazil
- Experimental Medicine Research Cluster (EMRC)University of Campinas (UNICAMP)CampinasBrazil
| | - Marco Aurélio R Vinolo
- Laboratory of ImmunoinflammationDepartment of Genetics, Microbiology and ImmunologyInstitute of BiologyUniversity of Campinas (UNICAMP)CampinasBrazil
- Experimental Medicine Research Cluster (EMRC)University of Campinas (UNICAMP)CampinasBrazil
| | - Pedro Elias Marques
- Laboratory of Molecular ImmunologyDepartment of Microbiology, Immunology and TransplantationRega Institute, KU LeuvenLeuvenBelgium
| | - Carine Wouters
- Laboratory of ImmunobiologyDepartment of Microbiology, Immunology and TransplantationRega Institute, KU LeuvenLeuvenBelgium
- Division of Pediatric RheumatologyUniversity Hospitals LeuvenLeuvenBelgium
- European Reference Network for Rare ImmunodeficiencyAutoinflammatory and Autoimmune Diseases (RITA) at University Hospitals LeuvenLeuvenBelgium
| | - Els Wauters
- Laboratory of Respiratory Diseases and Thoracic Surgery (BREATHE)Department of Chronic Diseases and MetabolismKU LeuvenLeuvenBelgium
| | - Sofie Struyf
- Laboratory of Molecular ImmunologyDepartment of Microbiology, Immunology and TransplantationRega Institute, KU LeuvenLeuvenBelgium
| | - Patrick Matthys
- Laboratory of ImmunobiologyDepartment of Microbiology, Immunology and TransplantationRega Institute, KU LeuvenLeuvenBelgium
| | - Ghislain Opdenakker
- Laboratory of ImmunobiologyDepartment of Microbiology, Immunology and TransplantationRega Institute, KU LeuvenLeuvenBelgium
| | - Rafael Elias Marques
- Brazilian Center for Research in Energy and Materials ‐ CNPEMBrazilian Biosciences National LaboratoryCampinasLNBioBrazil
| | - Joost Wauters
- Laboratory for Clinical Infectious and Inflammatory DisordersDepartment of Microbiology, Immunology and TransplantationKU LeuvenLeuvenBelgium
| | - Mieke Gouwy
- Laboratory of Molecular ImmunologyDepartment of Microbiology, Immunology and TransplantationRega Institute, KU LeuvenLeuvenBelgium
| | - Paul Proost
- Laboratory of Molecular ImmunologyDepartment of Microbiology, Immunology and TransplantationRega Institute, KU LeuvenLeuvenBelgium
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Abouelasrar Salama S, Gouwy M, De Zutter A, Pörtner N, Vanbrabant L, Berghmans N, De Buck M, Struyf S, Van Damme J. Induction of Chemokines by Hepatitis C Virus Proteins: Synergy of the Core Protein with Interleukin-1β and Interferon-γ in Liver Bystander Cells. J Interferon Cytokine Res 2020; 40:195-206. [PMID: 32031878 DOI: 10.1089/jir.2019.0115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Chronic hepatitis C virus (HCV) infection accounts for a large proportion of hepatic fibrosis and carcinoma cases observed worldwide. Mechanisms involved in HCV-induced hepatic injury have yet to be fully elucidated. Of particular interest is the capacity of HCV to regulate inflammatory responses. Here, we reveal modulation of cytokine activity by the HCV proteins non-structural protein 3 (NS3), glycoprotein E2, and core protein for their ability to induce chemokine expression in various liver bystander cells. Chemokines sustain chronic liver inflammation and relay multiple fibrogenic effects. CCL2, CCL3, CCL20, CXCL8, and CXCL10 were differentially expressed after treatment of monocytes, fibroblasts, or liver sinusoidal microvascular endothelial cells (LSECs) with HCV proteins. In comparison to NS3 and glycoprotein E2, core protein was a stronger inducer of chemokines in liver bystander cells. Interferon-γ (IFN-γ) and interleukin-1β (IL-1β) synergized with core protein to induce CCL2, CCL20, CXCL8, or CXCL10 in fibroblasts or LSECs. These findings reveal new mechanisms of hepatic injury caused by HCV.
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Affiliation(s)
- Sara Abouelasrar Salama
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Mieke Gouwy
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Alexandra De Zutter
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Noëmie Pörtner
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Lotte Vanbrabant
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Nele Berghmans
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Mieke De Buck
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Sofie Struyf
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Jo Van Damme
- Laboratory of Molecular Immunology, Department of Microbiology, Immunology and Transplantation, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
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Gouwy M, De Buck M, Abouelasrar Salama S, Vandooren J, Knoops S, Pörtner N, Vanbrabant L, Berghmans N, Opdenakker G, Proost P, Van Damme J, Struyf S. Matrix Metalloproteinase-9-Generated COOH-, but Not NH 2-Terminal Fragments of Serum Amyloid A1 Retain Potentiating Activity in Neutrophil Migration to CXCL8, With Loss of Direct Chemotactic and Cytokine-Inducing Capacity. Front Immunol 2018; 9:1081. [PMID: 29915572 PMCID: PMC5994419 DOI: 10.3389/fimmu.2018.01081] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [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] [Received: 11/23/2017] [Accepted: 04/30/2018] [Indexed: 12/21/2022] Open
Abstract
Serum amyloid A1 (SAA1) is a prototypic acute phase protein, induced to extremely high levels by physical insults, including inflammation and infection. Human SAA and its NH2-terminal part have been studied extensively in the context of amyloidosis. By contrast, little is known about COOH-terminal fragments of SAA. Intact SAA1 chemoattracts leukocytes via the G protein-coupled receptor formyl peptide receptor like 1/formyl peptide receptor 2 (FPR2). In addition to direct leukocyte activation, SAA1 induces chemokine production by signaling through toll-like receptor 2. We recently discovered that these induced chemokines synergize with intact SAA1 to chemoattract leukocytes in vitro and in vivo. Gelatinase B or matrix metalloproteinase-9 (MMP-9) is also induced by SAA1 during infection and inflammation and processes many substrates in the immune system. We demonstrate here that MMP-9 rapidly cleaves SAA1 at a known consensus sequence that is also present in gelatins. Processing of SAA1 by MMP-9 at an accessible loop between two alpha helices yielded predominantly three COOH-terminal fragments: SAA1(52–104), SAA1(57–104), and SAA1(58–104), with a relative molecular mass of 5,884.4, 5,327.3, and 5,256.3, respectively. To investigate the effect of proteolytic processing on the biological activity of SAA1, we chemically synthesized the COOH-terminal SAA fragments SAA1(52–104) and SAA1(58–104) and the complementary NH2-terminal peptide SAA1(1–51). In contrast to intact SAA1, the synthesized SAA1 peptides did not induce interleukin-8/CXCL8 in monocytes or fibroblasts. Moreover, these fragments possessed no direct chemotactic activity for neutrophils, as observed for intact SAA1. However, comparable to intact SAA1, SAA1(58–104) cooperated with CXCL8 in neutrophil activation and migration, whereas SAA1(1–51) lacked this potentiating activity. This cooperative interaction between the COOH-terminal SAA1 fragment and CXCL8 in neutrophil chemotaxis was mediated by FPR2. Hence, proteolytic cleavage of SAA1 by MMP-9 fine tunes the inflammatory capacity of this acute phase protein in that only the synergistic interactions with chemokines remain to prolong the duration of inflammation.
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Affiliation(s)
- Mieke Gouwy
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Mieke De Buck
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Sara Abouelasrar Salama
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Jennifer Vandooren
- Laboratory of Immunobiology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Sofie Knoops
- Laboratory of Immunobiology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Noëmie Pörtner
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Lotte Vanbrabant
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Nele Berghmans
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Ghislain Opdenakker
- Laboratory of Immunobiology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Paul Proost
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Jo Van Damme
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
| | - Sofie Struyf
- Laboratory of Molecular Immunology, Department of Microbiology and Immunology, Rega Institute for Medical Research, University of Leuven, Leuven, Belgium
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De Buck M, Berghmans N, Pörtner N, Vanbrabant L, Cockx M, Struyf S, Opdenakker G, Proost P, Van Damme J, Gouwy M. Serum amyloid A1α induces paracrine IL-8/CXCL8 via TLR2 and directly synergizes with this chemokine via CXCR2 and formyl peptide receptor 2 to recruit neutrophils. J Leukoc Biol 2015; 98:1049-60. [PMID: 26297794 DOI: 10.1189/jlb.3a0315-085r] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 07/23/2015] [Indexed: 11/24/2022] Open
Abstract
Cell migration depends on the ability of leukocytes to sense an external gradient of chemotactic proteins produced during inflammation. These proteins include chemokines, complement factors, and some acute phase proteins, such as serum amyloid A. Serum amyloid A chemoattracts neutrophils, monocytes, and T lymphocytes via its G protein-coupled receptor formyl peptide receptor 2. We demonstrate that serum amyloid A1α more potently chemoattracts neutrophils in vivo than in vitro. In contrast to CD14(+) monocytes, no rapid (within 2 h) induction of interleukin-8/CXC chemokine ligand 8 or macrophage-inflammatory protein-1α/CC chemokine ligand 3 was observed in purified human neutrophils after stimulation of the cells with serum amyloid A1α or lipopolysaccharide. Moreover, interleukin-8/CXC chemokine ligand 8 induction in monocytes by serum amyloid A1α was mediated by toll-like receptor 2 and was inhibited by association of serum amyloid A1α with high density lipoprotein. This indicates that the potent chemotactic response of neutrophils toward intraperitoneally injected serum amyloid A1α is indirectly enhanced by rapid induction of chemokines in peritoneal cells, synergizing in a paracrine manner with serum amyloid A1α. We observed direct synergy between IL-8/CXC chemokine ligand 8 and serum amyloid A1α, but not lipopolysaccharide, in chemotaxis and shape change assays with neutrophils. Furthermore, the selective CXC chemokine receptor 2 and formyl peptide receptor 2 antagonists, SB225002 and WRW4, respectively, blocked the synergy between IL-8/CXC chemokine ligand 8 and serum amyloid A1α in neutrophil chemotaxis in vitro, indicating that for synergy their corresponding G protein-coupled receptors are required. Additionally, SB225002 significantly inhibited serum amyloid A1α-mediated peritoneal neutrophil influx. Taken together, endogenous (e.g., IL-1β) and exogenous (e.g., lipopolysaccharide) inflammatory mediators induce primary chemoattractants such as serum amyloid A that synergize in an autocrine (monocyte) or a paracrine (neutrophil) fashion with secondary chemokines induced in stromal cells.
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Affiliation(s)
- Mieke De Buck
- *Laboratory of Molecular Immunology and Laboratory of Immunobiology, Rega Institute for Medical Research, Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium
| | - Nele Berghmans
- *Laboratory of Molecular Immunology and Laboratory of Immunobiology, Rega Institute for Medical Research, Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium
| | - Noëmie Pörtner
- *Laboratory of Molecular Immunology and Laboratory of Immunobiology, Rega Institute for Medical Research, Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium
| | - Lotte Vanbrabant
- *Laboratory of Molecular Immunology and Laboratory of Immunobiology, Rega Institute for Medical Research, Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium
| | - Maaike Cockx
- *Laboratory of Molecular Immunology and Laboratory of Immunobiology, Rega Institute for Medical Research, Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium
| | - Sofie Struyf
- *Laboratory of Molecular Immunology and Laboratory of Immunobiology, Rega Institute for Medical Research, Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium
| | - Ghislain Opdenakker
- *Laboratory of Molecular Immunology and Laboratory of Immunobiology, Rega Institute for Medical Research, Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium
| | - Paul Proost
- *Laboratory of Molecular Immunology and Laboratory of Immunobiology, Rega Institute for Medical Research, Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium
| | - Jo Van Damme
- *Laboratory of Molecular Immunology and Laboratory of Immunobiology, Rega Institute for Medical Research, Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium
| | - Mieke Gouwy
- *Laboratory of Molecular Immunology and Laboratory of Immunobiology, Rega Institute for Medical Research, Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium
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