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Götz MP, Duque Villegas MA, Fageräng B, Kerfin A, Skjoedt MO, Garred P, Rosbjerg A. Transient Binding Dynamics of Complement System Pattern Recognition Molecules on Pathogens. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2024; 212:1493-1503. [PMID: 38488502 DOI: 10.4049/jimmunol.2300768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 02/26/2024] [Indexed: 04/17/2024]
Abstract
Previous studies of pattern recognition molecules (PRMs) of the complement system have revealed difficulties in observing binding on pathogens such as Aspergillus fumigatus and Escherichia coli, despite complement deposition indicative of classical and lectin pathway activation. Thus, we investigated the binding dynamics of PRMs of the complement system, specifically C1q of the classical pathway and mannose-binding lectin (MBL) of the lectin pathway. We observed consistently increasing deposition of essential complement components such as C4b, C3b, and the terminal complement complex on A. fumigatus and E. coli. However, C1q and MBL binding to the surface rapidly declined during incubation after just 2-4 min in 10% plasma. The detachment of C1q and MBL can be linked to complement cascade activation, as the PRMs remain bound in the absence of plasma. The dissociation and the fate of C1q and MBL seem to have different mechanistic functions. Notably, C1q dynamics were associated with local C1 complex activation. When C1s was inhibited in plasma, C1q binding not only remained high but further increased over time. In contrast, MBL binding was inversely correlated with total and early complement activation due to MBL binding being partially retained by complement inhibition. Results indicate that detached MBL might be able to functionally rebind to A. fumigatus. In conclusion, these results reveal a (to our knowledge) novel "hit-and-run" complement-dependent PRM dynamic mechanism on pathogens. These dynamics may have profound implications for host defense and may help increase the functionality and longevity of complement-dependent PRMs in circulation.
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Affiliation(s)
- Maximilian Peter Götz
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
- Department of Immunology and Infectious Diseases, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Institute for Systemic Inflammation Research, Medicine Section, University of Lübeck, Lübeck, Germany
| | - Mario Alejandro Duque Villegas
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
- Infection Immunology, Research Center Borstel, Borstel, Germany
- Molecular and Experimental Mycobacteriology, Research Center Borstel, Borstel, Germany
| | - Beatrice Fageräng
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
- Department of Immunology, University of Oslo, Oslo University Hospital, Oslo, Norway
| | - Aileen Kerfin
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
- Institute for Systemic Inflammation Research, Medicine Section, University of Lübeck, Lübeck, Germany
| | - Mikkel-Ole Skjoedt
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
- Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Peter Garred
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Anne Rosbjerg
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Copenhagen University Hospital-Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Dobó J, Kocsis A, Farkas B, Demeter F, Cervenak L, Gál P. The Lectin Pathway of the Complement System-Activation, Regulation, Disease Connections and Interplay with Other (Proteolytic) Systems. Int J Mol Sci 2024; 25:1566. [PMID: 38338844 PMCID: PMC10855846 DOI: 10.3390/ijms25031566] [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: 12/21/2023] [Revised: 01/22/2024] [Accepted: 01/24/2024] [Indexed: 02/12/2024] Open
Abstract
The complement system is the other major proteolytic cascade in the blood of vertebrates besides the coagulation-fibrinolytic system. Among the three main activation routes of complement, the lectin pathway (LP) has been discovered the latest, and it is still the subject of intense research. Mannose-binding lectin (MBL), other collectins, and ficolins are collectively termed as the pattern recognition molecules (PRMs) of the LP, and they are responsible for targeting LP activation to molecular patterns, e.g., on bacteria. MBL-associated serine proteases (MASPs) are the effectors, while MBL-associated proteins (MAps) have regulatory functions. Two serine protease components, MASP-1 and MASP-2, trigger the LP activation, while the third component, MASP-3, is involved in the function of the alternative pathway (AP) of complement. Besides their functions within the complement system, certain LP components have secondary ("moonlighting") functions, e.g., in embryonic development. They also contribute to blood coagulation, and some might have tumor suppressing roles. Uncontrolled complement activation can contribute to the progression of many diseases (e.g., stroke, kidney diseases, thrombotic complications, and COVID-19). In most cases, the lectin pathway has also been implicated. In this review, we summarize the history of the lectin pathway, introduce their components, describe its activation and regulation, its roles within the complement cascade, its connections to blood coagulation, and its direct cellular effects. Special emphasis is placed on disease connections and the non-canonical functions of LP components.
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Affiliation(s)
- József Dobó
- Institute of Molecular Life Sciences, HUN-REN Research Centre for Natural Sciences, Hungarian Research Network, 1117 Budapest, Hungary; (J.D.); (A.K.); (B.F.)
| | - Andrea Kocsis
- Institute of Molecular Life Sciences, HUN-REN Research Centre for Natural Sciences, Hungarian Research Network, 1117 Budapest, Hungary; (J.D.); (A.K.); (B.F.)
| | - Bence Farkas
- Institute of Molecular Life Sciences, HUN-REN Research Centre for Natural Sciences, Hungarian Research Network, 1117 Budapest, Hungary; (J.D.); (A.K.); (B.F.)
| | - Flóra Demeter
- Cell Biology and Cell Therapy Group, Research Laboratory, Department of Internal Medicine and Hematology, Semmelweis University, 1085 Budapest, Hungary; (F.D.); (L.C.)
| | - László Cervenak
- Cell Biology and Cell Therapy Group, Research Laboratory, Department of Internal Medicine and Hematology, Semmelweis University, 1085 Budapest, Hungary; (F.D.); (L.C.)
| | - Péter Gál
- Institute of Molecular Life Sciences, HUN-REN Research Centre for Natural Sciences, Hungarian Research Network, 1117 Budapest, Hungary; (J.D.); (A.K.); (B.F.)
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Zelek WM, Harrison RA. Complement and COVID-19: Three years on, what we know, what we don't know, and what we ought to know. Immunobiology 2023; 228:152393. [PMID: 37187043 PMCID: PMC10174470 DOI: 10.1016/j.imbio.2023.152393] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/05/2023] [Accepted: 05/08/2023] [Indexed: 05/17/2023]
Abstract
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus was identified in China in 2019 as the causative agent of COVID-19, and quickly spread throughout the world, causing over 7 million deaths, of which 2 million occurred prior to the introduction of the first vaccine. In the following discussion, while recognising that complement is just one of many players in COVID-19, we focus on the relationship between complement and COVID-19 disease, with limited digression into directly-related areas such as the relationship between complement, kinin release, and coagulation. Prior to the 2019 COVID-19 outbreak, an important role for complement in coronavirus diseases had been established. Subsequently, multiple investigations of patients with COVID-19 confirmed that complement dysregulation is likely to be a major driver of disease pathology, in some, if not all, patients. These data fuelled evaluation of many complement-directed therapeutic agents in small patient cohorts, with claims of significant beneficial effect. As yet, these early results have not been reflected in larger clinical trials, posing questions such as who to treat, appropriate time to treat, duration of treatment, and optimal target for treatment. While significant control of the pandemic has been achieved through a global scientific and medical effort to comprehend the etiology of the disease, through extensive SARS-CoV-2 testing and quarantine measures, through vaccine development, and through improved therapy, possibly aided by attenuation of the dominant strains, it is not yet over. In this review, we summarise complement-relevant literature, emphasise its main conclusions, and formulate a hypothesis for complement involvement in COVID-19. Based on this we make suggestions as to how any future outbreak might be better managed in order to minimise impact on patients.
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Affiliation(s)
- Wioleta M Zelek
- Dementia Research Institute and Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, United Kingdom
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Hurler L, Szilágyi Á, Mescia F, Bergamaschi L, Mező B, Sinkovits G, Réti M, Müller V, Iványi Z, Gál J, Gopcsa L, Reményi P, Szathmáry B, Lakatos B, Szlávik J, Bobek I, Prohászka ZZ, Förhécz Z, Csuka D, Kajdácsi E, Cervenak L, Kiszel P, Masszi T, Vályi-Nagy I, Würzner R, Lyons PA, Toonen EJM, Prohászka Z. Complement lectin pathway activation is associated with COVID-19 disease severity, independent of MBL2 genotype subgroups. Front Immunol 2023; 14:1162171. [PMID: 37051252 PMCID: PMC10084477 DOI: 10.3389/fimmu.2023.1162171] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 03/08/2023] [Indexed: 03/30/2023] Open
Abstract
IntroductionWhile complement is a contributor to disease severity in severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infections, all three complement pathways might be activated by the virus. Lectin pathway activation occurs through different pattern recognition molecules, including mannan binding lectin (MBL), a protein shown to interact with SARS-CoV-2 proteins. However, the exact role of lectin pathway activation and its key pattern recognition molecule MBL in COVID-19 is still not fully understood.MethodsWe therefore investigated activation of the lectin pathway in two independent cohorts of SARS-CoV-2 infected patients, while also analysing MBL protein levels and potential effects of the six major single nucleotide polymorphisms (SNPs) found in the MBL2 gene on COVID-19 severity and outcome.ResultsWe show that the lectin pathway is activated in acute COVID-19, indicated by the correlation between complement activation product levels of the MASP-1/C1-INH complex (p=0.0011) and C4d (p<0.0001) and COVID-19 severity. Despite this, genetic variations in MBL2 are not associated with susceptibility to SARS-CoV-2 infection or disease outcomes such as mortality and the development of Long COVID.ConclusionIn conclusion, activation of the MBL-LP only plays a minor role in COVID-19 pathogenesis, since no clinically meaningful, consistent associations with disease outcomes were noted.
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Affiliation(s)
- Lisa Hurler
- Department of Internal Medicine and Haematology, Semmelweis University, Budapest, Hungary
| | - Ágnes Szilágyi
- Department of Internal Medicine and Haematology, Semmelweis University, Budapest, Hungary
| | - Federica Mescia
- Cambridge Institute of Therapeutic Immunology and Infectious Disease, Jeffrey Cheah Biomedical Centre, University of Cambridge, Cambridge, United Kingdom
- Department of Medicine, University of Cambridge, Addenbrooke’s Hospital, Cambridge, United Kingdom
| | - Laura Bergamaschi
- Cambridge Institute of Therapeutic Immunology and Infectious Disease, Jeffrey Cheah Biomedical Centre, University of Cambridge, Cambridge, United Kingdom
- Department of Medicine, University of Cambridge, Addenbrooke’s Hospital, Cambridge, United Kingdom
| | - Blanka Mező
- Department of Internal Medicine and Haematology, Semmelweis University, Budapest, Hungary
- Research Group for Immunology and Haematology, Semmelweis University - Eötvös Loránd Research Network (Office for Supported Research Groups), Budapest, Hungary
| | - György Sinkovits
- Department of Internal Medicine and Haematology, Semmelweis University, Budapest, Hungary
| | - Marienn Réti
- Department of Haematology and Stem Cell Transplantation, Central Hospital of Southern Pest - Institute of Haematology and Infectious Diseases, Budapest, Hungary
| | - Veronika Müller
- Department of Pulmonology, Semmelweis University, Budapest, Hungary
| | - Zsolt Iványi
- Department of Anaesthesiology and Intensive Therapy, Semmelweis University, Budapest, Hungary
| | - János Gál
- Department of Anaesthesiology and Intensive Therapy, Semmelweis University, Budapest, Hungary
| | - László Gopcsa
- Department of Haematology and Stem Cell Transplantation, Central Hospital of Southern Pest - Institute of Haematology and Infectious Diseases, Budapest, Hungary
| | - Péter Reményi
- Department of Haematology and Stem Cell Transplantation, Central Hospital of Southern Pest - Institute of Haematology and Infectious Diseases, Budapest, Hungary
| | - Beáta Szathmáry
- Department of Infectology, Central Hospital of Southern Pest - Institute of Haematology and Infectious Diseases, Budapest, Hungary
| | - Botond Lakatos
- Department of Infectology, Central Hospital of Southern Pest - Institute of Haematology and Infectious Diseases, Budapest, Hungary
| | - János Szlávik
- Department of Infectology, Central Hospital of Southern Pest - Institute of Haematology and Infectious Diseases, Budapest, Hungary
| | - Ilona Bobek
- Department of Anaesthesiology and Intensive Therapy, Central Hospital of Southern Pest - Institute of Haematology and Infectious Diseases, Budapest, Hungary
| | - Zita Z. Prohászka
- Department of Internal Medicine and Haematology, Semmelweis University, Budapest, Hungary
| | - Zsolt Förhécz
- Department of Internal Medicine and Haematology, Semmelweis University, Budapest, Hungary
| | - Dorottya Csuka
- Department of Internal Medicine and Haematology, Semmelweis University, Budapest, Hungary
| | - Erika Kajdácsi
- Department of Internal Medicine and Haematology, Semmelweis University, Budapest, Hungary
| | - László Cervenak
- Department of Internal Medicine and Haematology, Semmelweis University, Budapest, Hungary
| | - Petra Kiszel
- Research Group for Immunology and Haematology, Semmelweis University - Eötvös Loránd Research Network (Office for Supported Research Groups), Budapest, Hungary
| | - Tamás Masszi
- Department of Internal Medicine and Haematology, Semmelweis University, Budapest, Hungary
| | - István Vályi-Nagy
- Department of Haematology and Stem Cell Transplantation, Central Hospital of Southern Pest - Institute of Haematology and Infectious Diseases, Budapest, Hungary
| | - Reinhard Würzner
- Institute of Hygiene and Medical Microbiology, Medical University of Innsbruck, Innsbruck, Austria
| | | | - Paul A. Lyons
- Cambridge Institute of Therapeutic Immunology and Infectious Disease, Jeffrey Cheah Biomedical Centre, University of Cambridge, Cambridge, United Kingdom
- Department of Medicine, University of Cambridge, Addenbrooke’s Hospital, Cambridge, United Kingdom
| | - Erik J. M. Toonen
- Research and Development Department, Hycult Biotech, Uden, Netherlands
| | - Zoltán Prohászka
- Department of Internal Medicine and Haematology, Semmelweis University, Budapest, Hungary
- Research Group for Immunology and Haematology, Semmelweis University - Eötvös Loránd Research Network (Office for Supported Research Groups), Budapest, Hungary
- *Correspondence: Zoltán Prohászka,
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Tsiftsoglou SA, Gavriilaki E, Touloumenidou T, Koravou EE, Koutra M, Papayanni PG, Karali V, Papalexandri A, Varelas C, Chatzopoulou F, Chatzidimitriou M, Chatzidimitriou D, Veleni A, Rapti E, Kioumis I, Kaimakamis E, Bitzani M, Boumpas DT, Tsantes A, Sotiropoulos D, Papadopoulou A, Sakellari I, Kokoris S, Anagnostopoulos A. Targeted genotyping of COVID-19 patients reveals a signature of complement C3 and factor B coding SNPs associated with severe infection. Immunobiology 2023; 228:152351. [PMID: 36805858 PMCID: PMC9928680 DOI: 10.1016/j.imbio.2023.152351] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 01/19/2023] [Accepted: 02/11/2023] [Indexed: 02/17/2023]
Abstract
We have attempted to explore further the involvement of complement components in the host COVID-19 (Coronavirus disease-19) immune responses by targeted genotyping of COVID-19 adult patients and analysis for missense coding Single Nucleotide Polymorphisms (coding SNPs) of genes encoding Alternative pathway (AP) components. We have identified a small group of common coding SNPs in Survivors and Deceased individuals, present in either relatively similar frequencies (CFH and CFI SNPs) or with stark differences in their relative abundance (C3 and CFB SNPs). In addition, we have identified several sporadic, potentially protective, coding SNPs of C3, CFB, CFD, CFH, CFHR1 and CFI in Survivors. No coding SNPs were detected for CD46 and CD55. Our demographic analysis indicated that the C3 rs1047286 or rs2230199 coding SNPs were present in 60 % of all the Deceased patients (n = 25) (the rs2230199 in 67 % of all Deceased Males) and in 31 % of all the Survivors (n = 105, p = 0.012) (the rs2230199 in 25 % of all Survivor Males). When we analysed these two major study groups using the presence of the C3 rs1047286 or rs2230199 SNPs as potential biomarkers, we noticed the complete absence of the protective CFB rs12614 and rs641153 coding SNPs from Deceased Males compared to Females (p = 0.0023). We propose that in these individuals, C3 carrying the R102G and CFB lacking the R32W or the R32Q amino acid substitutions, may contribute to enhanced association dynamics of the C3bBb AP pre-convertase complex assembly, thus enabling the exploitation of the activation of the Complement Alternative pathway (AP) by SARS-CoV-2.
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Affiliation(s)
- Stefanos A Tsiftsoglou
- Laboratory of Pharmacology, Department of Pharmaceutical Sciences, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece.
| | - Eleni Gavriilaki
- Hematology Department-BMT Unit, G. Papanicolaou Hospital, Exochi, Thessaloniki 57010, Greece.
| | - Tasoula Touloumenidou
- Hematology Department-BMT Unit, G. Papanicolaou Hospital, Exochi, Thessaloniki 57010, Greece
| | | | - Maria Koutra
- Hematology Department-BMT Unit, G. Papanicolaou Hospital, Exochi, Thessaloniki 57010, Greece
| | | | - Vassiliki Karali
- Rheumatology and Clinical Immunology Unit, University General Hospital "Attikon", Αthens, Greece
| | - Apostolia Papalexandri
- Hematology Department-BMT Unit, G. Papanicolaou Hospital, Exochi, Thessaloniki 57010, Greece
| | - Christos Varelas
- Hematology Department-BMT Unit, G. Papanicolaou Hospital, Exochi, Thessaloniki 57010, Greece
| | - Fani Chatzopoulou
- Microbiology Department, Aristotle University of Thessaloniki, Greece
| | - Maria Chatzidimitriou
- Biomedical Sciences Alexander Campus International Hellenic University, Thessaloniki, Greece
| | | | - Anastasia Veleni
- Infectious Disease Committee, G Papanicolaou Hospital, Thessaloniki, Greece
| | - Evdoxia Rapti
- Laboratory of Hematology and Hospital Blood Transfusion Department, University General Hospital "Attikon", NKUA, Medical School, Athens, Greece
| | - Ioannis Kioumis
- Respiratory Failure Department, G Papanicolaou Hospital-Aristotle University of Thessaloniki, Thessaloniki, Greece
| | | | - Milly Bitzani
- 1st Intensive Care Unit, G Papanicolaou Hospital, Thessaloniki, Greece
| | - Dimitrios T Boumpas
- Rheumatology and Clinical Immunology Unit, University General Hospital "Attikon", Αthens, Greece
| | - Argyris Tsantes
- Laboratory of Hematology and Hospital Blood Transfusion Department, University General Hospital "Attikon", NKUA, Medical School, Athens, Greece
| | - Damianos Sotiropoulos
- Hematology Department-BMT Unit, G. Papanicolaou Hospital, Exochi, Thessaloniki 57010, Greece
| | - Anastasia Papadopoulou
- Hematology Department-BMT Unit, G. Papanicolaou Hospital, Exochi, Thessaloniki 57010, Greece
| | - Ioanna Sakellari
- Hematology Department-BMT Unit, G. Papanicolaou Hospital, Exochi, Thessaloniki 57010, Greece
| | - Styliani Kokoris
- Laboratory of Hematology and Hospital Blood Transfusion Department, University General Hospital "Attikon", NKUA, Medical School, Athens, Greece
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