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Merle NS, Roumenina LT. The complement system as a target in cancer immunotherapy. Eur J Immunol 2024:e2350820. [PMID: 38996361 DOI: 10.1002/eji.202350820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Revised: 06/26/2024] [Accepted: 07/02/2024] [Indexed: 07/14/2024]
Abstract
Malignant cells are part of a complex network within the tumor microenvironment, where their interaction with host cells and soluble mediators, including complement components, is pivotal. The complement system, known for its role in immune defense and homeostasis, exhibits a dual effect on cancer progression. This dichotomy arises from its antitumoral opsonophagocytosis and cytotoxicity versus its protumoral chronic inflammation mediated by the C5a/C5aR1 axis, influencing antitumor T-cell responses. Recent studies have revealed distinct co-expression patterns of complement genes in various cancer types, correlating with prognosis. Notably, some cancers exhibit co-regulated overexpression of complement genes associated with poor prognosis, while others show favorable outcomes. However, significant intra-patient heterogeneity further complicates this classification. Moreover, the involvement of locally produced and intracellular complement proteins adds complexity to the tumor microenvironment dynamics. This review highlights the unique interplay of complement components within different cancers and patient cohorts, showing that "one size does not fit all", for complement in cancer. It summarizes the clinical trials for complement targeting in cancer, emphasizing the need for tailored therapeutic approaches. By elucidating the mechanistic basis of complement's context-dependent role, this review aims to facilitate the development of personalized cancer therapies, ultimately improving patient care and outcomes.
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Affiliation(s)
- Nicolas S Merle
- Centre de Recherche des Cordeliers, Sorbonne Université, Inserm, Université Paris Cité, Inflammation, Complement and Cancer team, Paris, France
| | - Lubka T Roumenina
- Centre de Recherche des Cordeliers, Sorbonne Université, Inserm, Université Paris Cité, Inflammation, Complement and Cancer team, Paris, France
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2
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Scott-Hewitt N, Mahoney M, Huang Y, Korte N, Yvanka de Soysa T, Wilton DK, Knorr E, Mastro K, Chang A, Zhang A, Melville D, Schenone M, Hartigan C, Stevens B. Microglial-derived C1q integrates into neuronal ribonucleoprotein complexes and impacts protein homeostasis in the aging brain. Cell 2024:S0092-8674(24)00639-1. [PMID: 38942014 DOI: 10.1016/j.cell.2024.05.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 01/08/2024] [Accepted: 05/31/2024] [Indexed: 06/30/2024]
Abstract
Neuroimmune interactions mediate intercellular communication and underlie critical brain functions. Microglia, CNS-resident macrophages, modulate the brain through direct physical interactions and the secretion of molecules. One such secreted factor, the complement protein C1q, contributes to complement-mediated synapse elimination in both developmental and disease models, yet brain C1q protein levels increase significantly throughout aging. Here, we report that C1q interacts with neuronal ribonucleoprotein (RNP) complexes in an age-dependent manner. Purified C1q protein undergoes RNA-dependent liquid-liquid phase separation (LLPS) in vitro, and the interaction of C1q with neuronal RNP complexes in vivo is dependent on RNA and endocytosis. Mice lacking C1q have age-specific alterations in neuronal protein synthesis in vivo and impaired fear memory extinction. Together, our findings reveal a biophysical property of C1q that underlies RNA- and age-dependent neuronal interactions and demonstrate a role of C1q in critical intracellular neuronal processes.
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Affiliation(s)
- Nicole Scott-Hewitt
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA 02115, USA; The Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.
| | - Matthew Mahoney
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA 02115, USA
| | - Youtong Huang
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA 02115, USA; The Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Nils Korte
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA 02115, USA; The Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - T Yvanka de Soysa
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA 02115, USA; The Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Daniel K Wilton
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA 02115, USA; The Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Emily Knorr
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA 02115, USA
| | - Kevin Mastro
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA 02115, USA; The Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Allison Chang
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA 02115, USA
| | - Allison Zhang
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA 02115, USA
| | - David Melville
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA 02115, USA
| | - Monica Schenone
- The Broad Proteomics Platform, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Christina Hartigan
- The Broad Proteomics Platform, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Beth Stevens
- F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA 02115, USA; The Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Howard Hughes Medical Investigator, Boston Children's Hospital, Boston, MA 02115, USA.
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3
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Peterson SL, Krishnan A, Patel D, Khanehzar A, Lad A, Shaughnessy J, Ram S, Callanan D, Kunimoto D, Genead MA, Tolentino MJ. PolySialic Acid Nanoparticles Actuate Complement-Factor-H-Mediated Inhibition of the Alternative Complement Pathway: A Safer Potential Therapy for Age-Related Macular Degeneration. Pharmaceuticals (Basel) 2024; 17:517. [PMID: 38675477 PMCID: PMC11053938 DOI: 10.3390/ph17040517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 04/10/2024] [Accepted: 04/11/2024] [Indexed: 04/28/2024] Open
Abstract
The alternative pathway of the complement system is implicated in the etiology of age-related macular degeneration (AMD). Complement depletion with pegcetacoplan and avacincaptad pegol are FDA-approved treatments for geographic atrophy in AMD that, while effective, have clinically observed risks of choroidal neovascular (CNV) conversion, optic neuritis, and retinal vasculitis, leaving room for other equally efficacious but safer therapeutics, including Poly Sialic acid (PSA) nanoparticle (PolySia-NP)-actuated complement factor H (CFH) alternative pathway inhibition. Our previous paper demonstrated that PolySia-NP inhibits pro-inflammatory polarization and cytokine release. Here, we extend these findings by investigating the therapeutic potential of PolySia-NP to attenuate the alternative complement pathway. First, we show that PolySia-NP binds CFH and enhances affinity to C3b. Next, we demonstrate that PolySia-NP treatment of human serum suppresses alternative pathway hemolytic activity and C3b deposition. Further, we show that treating human macrophages with PolySia-NP is non-toxic and reduces markers of complement activity. Finally, we describe PolySia-NP-treatment-induced decreases in neovascularization and inflammatory response in a laser-induced CNV mouse model of neovascular AMD. In conclusion, PolySia-NP suppresses alternative pathway complement activity in human serum, human macrophage, and mouse CNV without increasing neovascularization.
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Affiliation(s)
- Sheri L. Peterson
- Aviceda Therapeutics Inc., Cambridge, MA 02142, USA; (A.K.); (A.L.); (D.C.); (D.K.); (M.A.G.)
| | - Anitha Krishnan
- Aviceda Therapeutics Inc., Cambridge, MA 02142, USA; (A.K.); (A.L.); (D.C.); (D.K.); (M.A.G.)
| | - Diyan Patel
- Aviceda Therapeutics Inc., Cambridge, MA 02142, USA; (A.K.); (A.L.); (D.C.); (D.K.); (M.A.G.)
| | - Ali Khanehzar
- Aviceda Therapeutics Inc., Cambridge, MA 02142, USA; (A.K.); (A.L.); (D.C.); (D.K.); (M.A.G.)
| | - Amit Lad
- Aviceda Therapeutics Inc., Cambridge, MA 02142, USA; (A.K.); (A.L.); (D.C.); (D.K.); (M.A.G.)
| | - Jutamas Shaughnessy
- Division of Infectious Diseases and Immunology, University of Massachusetts Chan Medical School, Worcester, MA 01655, USA; (J.S.); (S.R.)
| | - Sanjay Ram
- Division of Infectious Diseases and Immunology, University of Massachusetts Chan Medical School, Worcester, MA 01655, USA; (J.S.); (S.R.)
| | - David Callanan
- Aviceda Therapeutics Inc., Cambridge, MA 02142, USA; (A.K.); (A.L.); (D.C.); (D.K.); (M.A.G.)
- Department of Ophthalmology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Derek Kunimoto
- Aviceda Therapeutics Inc., Cambridge, MA 02142, USA; (A.K.); (A.L.); (D.C.); (D.K.); (M.A.G.)
| | - Mohamed A. Genead
- Aviceda Therapeutics Inc., Cambridge, MA 02142, USA; (A.K.); (A.L.); (D.C.); (D.K.); (M.A.G.)
| | - Michael J. Tolentino
- Aviceda Therapeutics Inc., Cambridge, MA 02142, USA; (A.K.); (A.L.); (D.C.); (D.K.); (M.A.G.)
- Department of Ophthalmology, University of Central Florida School of Medicine, Orlando, FL 32827, USA
- Department of Ophthalmology, Orlando College of Osteopathic Medicine, Orlando, FL 34787, USA
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4
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Zhang Y, Wang L, Kuang X, Tang D, Zhang P. Diagnostic and Prognostic Value of C1q in Sepsis-Induced Coagulopathy. Clin Appl Thromb Hemost 2024; 30:10760296241257517. [PMID: 38778544 PMCID: PMC11113060 DOI: 10.1177/10760296241257517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 04/27/2024] [Accepted: 05/10/2024] [Indexed: 05/25/2024] Open
Abstract
Early identification of biomarkers that can predict the onset of sepsis-induced coagulopathy (SIC) in septic patients is clinically important. This study endeavors to examine the diagnostic and prognostic utility of serum C1q in the context of SIC. Clinical data from 279 patients diagnosed with sepsis at the Departments of Intensive Care, Respiratory Intensive Care, and Infectious Diseases at the Renmin Hospital of Wuhan University were gathered spanning from January 2022 to January 2024. These patients were categorized into two groups: the SIC group comprising 108 cases and the non-SIC group consisting of 171 cases, based on the presence of SIC. Within the SIC group, patients were further subdivided into a survival group (43 cases) and non-survival group (65 cases). The concentration of serum C1q in the SIC group was significantly lower than that in the non-SIC group. Furthermore, A significant correlation was observed between serum C1q levels and both SIC score and coagulation indices. C1q demonstrated superior diagnostic and prognostic performance for SIC patients, as indicated by a higher area under the curve (AUC). Notably, when combined with CRP, PCT, and SOFA score, C1q displayed the most robust diagnostic efficacy for SIC. Moreover, the combination of C1q with the SOFA score heightened predictive value concerning the 28-day mortality of SIC patients.
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Affiliation(s)
- Ye Zhang
- Department of Clinical Laboratory, Institute of Translational Medicine, Renmin Hospital of Wuhan University, Wuhan, PR China
| | - Li Wang
- Department of Clinical Laboratory, Institute of Translational Medicine, Renmin Hospital of Wuhan University, Wuhan, PR China
| | - Xiandong Kuang
- Department of Clinical Laboratory, Institute of Translational Medicine, Renmin Hospital of Wuhan University, Wuhan, PR China
| | - Dongling Tang
- Department of Clinical Laboratory, Institute of Translational Medicine, Renmin Hospital of Wuhan University, Wuhan, PR China
| | - Pingan Zhang
- Department of Clinical Laboratory, Institute of Translational Medicine, Renmin Hospital of Wuhan University, Wuhan, PR China
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Ma YJ, Parente R, Zhong H, Sun Y, Garlanda C, Doni A. Complement-pentraxins synergy: Navigating the immune battlefield and beyond. Biomed Pharmacother 2023; 169:115878. [PMID: 37952357 DOI: 10.1016/j.biopha.2023.115878] [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: 08/29/2023] [Revised: 11/07/2023] [Accepted: 11/07/2023] [Indexed: 11/14/2023] Open
Abstract
The complement is a crucial immune defense system that triggers rapid immune responses and offers efficient protection against foreign invaders and unwanted host elements, acting as a sentinel. Activation of the complement system occurs upon the recognition of pathogenic microorganisms or altered self-cells by pattern-recognition molecules (PRMs) such as C1q, collectins, ficolins, and pentraxins. Recent accumulating evidence shows that pentraxins establish a cooperative network with different classes of effector PRMs, resulting in synergistic effects in complement activation. This review describes the complex interaction of pentraxins with the complement system and the implications of this cooperative network for effective host defense during pathogen invasion.
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Affiliation(s)
- Ying Jie Ma
- Department of Health Technology, Technical University of Denmark, Kongens Lyngby, DK-2800, Denmark.
| | | | - Hang Zhong
- Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy; Haartman Institute, University of Helsinki, Helsinki, Finland
| | - Yi Sun
- Department of Health Technology, Technical University of Denmark, Kongens Lyngby, DK-2800, Denmark
| | - Cecilia Garlanda
- IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy; Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Milan, Italy
| | - Andrea Doni
- IRCCS Humanitas Research Hospital, Rozzano, Milan, Italy.
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Wang Y, Chen W, Ding S, Wang W, Wang C. Pentraxins in invertebrates and vertebrates: From structure, function and evolution to clinical applications. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2023; 149:105064. [PMID: 37734429 DOI: 10.1016/j.dci.2023.105064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 09/18/2023] [Accepted: 09/18/2023] [Indexed: 09/23/2023]
Abstract
The immune system is divided into two broad categories, consisting of innate and adaptive immunity. As recognition and effector factors of innate immunity and regulators of adaptive immune responses, lectins are considered to be important defense chemicals against microbial pathogens, cell trafficking, immune regulation, and prevention of autoimmunity. Pentraxins, important members of animal lectins, play a significant role in protecting the body from pathogen infection and regulating inflammatory reactions. They can recognize and bind to a variety of ligands, including carbohydrates, lipids, proteins, nucleic acids and their complexes, and protect the host from pathogen invasion by activating the complement cascade and Fcγ receptor pathways. Based on the primary structure of the subunit, pentraxins are divided into short and long pentraxins. The short pentraxins are comprised of C-reactive protein (CRP) and serum amyloid P (SAP), and the most important member of the long pentraxins is pentraxin 3 (PTX3). The CRP and SAP exist in both vertebrates and invertebrates, while the PTX3 may be present only in vertebrates. The major ligands and functions of CRP, SAP and PTX3 and three activation pathways involved in the complement system are summarized in this review. Their different characteristics in various animals including humans, and their evolutionary trees are analyzed. The clinical applications of CRP, SAP and PTX3 in human are reviewed. Some questions that remain to be understood are also highlighted.
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Affiliation(s)
- Yuying Wang
- School of Life Sciences, Ludong University, Yantai, 264025, People's Republic of China
| | - Wei Chen
- School of Life Sciences, Ludong University, Yantai, 264025, People's Republic of China; Yantai Productivity Promotion Center, Yantai, 264003, People's Republic of China
| | - Shuo Ding
- School of Life Sciences, Ludong University, Yantai, 264025, People's Republic of China
| | - Wenjun Wang
- School of Life Sciences, Ludong University, Yantai, 264025, People's Republic of China
| | - Changliu Wang
- School of Life Sciences, Ludong University, Yantai, 264025, People's Republic of China.
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Potempa LA, Qiu WQ, Stefanski A, Rajab IM. Relevance of lipoproteins, membranes, and extracellular vesicles in understanding C-reactive protein biochemical structure and biological activities. Front Cardiovasc Med 2022; 9:979461. [PMID: 36158829 PMCID: PMC9493015 DOI: 10.3389/fcvm.2022.979461] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 07/29/2022] [Indexed: 11/13/2022] Open
Abstract
Early purification protocols for C-reactive protein (CRP) often involved co-isolation of lipoproteins, primarily very low-density lipoproteins (VLDLs). The interaction with lipid particles was initially attributed to CRP’s calcium-dependent binding affinity for its primary ligand—phosphocholine—the predominant hydrophilic head group expressed on phospholipids of most lipoprotein particles. Later, CRP was shown to additionally express binding affinity for apolipoprotein B (apo B), a predominant apolipoprotein of both VLDL and LDL particles. Apo B interaction with CRP was shown to be mediated by a cationic peptide sequence in apo B. Optimal apo B binding required CRP to be surface immobilized or aggregated, treatments now known to structurally change CRP from its serum soluble pentamer isoform (i.e., pCRP) into its poorly soluble, modified, monomeric isoform (i.e., mCRP). Other cationic ligands have been described for CRP which affect complement activation, histone bioactivities, and interactions with membranes. mCRP, but not pCRP, binds cholesterol and activates signaling pathways that activate pro-inflammatory bioactivities long associated with CRP as a biomarker. Hence, a key step to express CRP’s biofunctions is its conversion into its mCRP isoform. Conversion occurs when (1) pCRP binds to a membrane surface expressed ligand (often phosphocholine); (2) biochemical forces associated with binding cause relaxation/partial dissociation of secondary and tertiary structures into a swollen membrane bound intermediate (described as mCRPm or pCRP*); (3) further structural relaxation which leads to total, irreversible dissociation of the pentamer into mCRP and expression of a cholesterol/multi-ligand binding sequence that extends into the subunit core; (4) reduction of the CRP subunit intrachain disulfide bond which enhances CRP’s binding accessibility for various ligands and activates acute phase proinflammatory responses. Taken together, the biofunctions of CRP involve both lipid and protein interactions and a conformational rearrangement of higher order structure that affects its role as a mediator of inflammatory responses.
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Affiliation(s)
- Lawrence A. Potempa
- College of Science, Health and Pharmacy, Roosevelt University Schaumburg, Schaumburg, IL, United States
- *Correspondence: Lawrence A. Potempa,
| | - Wei Qiao Qiu
- Department of Pharmacology and Experimental Therapeutics, Boston University School of Medicine, Boston, MA, United States
- Alzheimer’s Disease Center, Boston University School of Medicine, Boston, MA, United States
- Department of Psychiatry, Boston University School of Medicine, Boston, MA, United States
| | - Ashley Stefanski
- College of Science, Health and Pharmacy, Roosevelt University Schaumburg, Schaumburg, IL, United States
| | - Ibraheem M. Rajab
- College of Science, Health and Pharmacy, Roosevelt University Schaumburg, Schaumburg, IL, United States
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PTX3 structure determination using a hybrid cryoelectron microscopy and AlphaFold approach offers insights into ligand binding and complement activation. Proc Natl Acad Sci U S A 2022; 119:e2208144119. [PMID: 35939690 PMCID: PMC9388099 DOI: 10.1073/pnas.2208144119] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Pattern recognition molecules (PRMs) form an important part of innate immunity, where they facilitate the response to infections and damage by triggering processes such as inflammation. The pentraxin family of soluble PRMs comprises long and short pentraxins, with the former containing unique N-terminal regions unrelated to other proteins or each other. No complete high-resolution structural information exists about long pentraxins, unlike the short pentraxins, where there is an abundance of both X-ray and cryoelectron microscopy (cryo-EM)-derived structures. This study presents a high-resolution structure of the prototypical long pentraxin, PTX3. Cryo-EM yielded a 2.5-Å map of the C-terminal pentraxin domains that revealed a radically different quaternary structure compared to other pentraxins, comprising a glycosylated D4 symmetrical octameric complex stabilized by an extensive disulfide network. The cryo-EM map indicated α-helices that extended N terminal of the pentraxin domains that were not fully resolved. AlphaFold was used to predict the remaining N-terminal structure of the octameric PTX3 complex, revealing two long tetrameric coiled coils with two hinge regions, which was validated using classification of cryo-EM two-dimensional averages. The resulting hybrid cryo-EM/AlphaFold structure allowed mapping of ligand binding sites, such as C1q and fibroblast growth factor-2, as well as rationalization of previous biochemical data. Given the relevance of PTX3 in conditions ranging from COVID-19 prognosis, cancer progression, and female infertility, this structure could be used to inform the understanding and rational design of therapies for these disorders and processes.
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Shafreen RMB, Lakshmi SA, Pandian SK, Kim YM, Deutsch J, Katrich E, Gorinstein S. In Vitro and In Silico Interaction Studies with Red Wine Polyphenols against Different Proteins from Human Serum. Molecules 2021; 26:molecules26216686. [PMID: 34771095 PMCID: PMC8587719 DOI: 10.3390/molecules26216686] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/29/2021] [Accepted: 11/01/2021] [Indexed: 12/23/2022] Open
Abstract
Previous reports have shown that consumption of wine has several health benefits; however, there are different types of wine. In the present study, red wines were investigated for their compositions of active ingredients. The interaction of each component in terms of its binding mode with different serum proteins was unraveled, and the components were implicated as drug candidates in clinical settings. Overall, the study indicates that red wines have a composition of flavonoids, non-flavonoids, and phenolic acids that can interact with the key regions of proteins to enhance their biological activity. Among them, rutin, resveratrol, and tannic acid have shown good binding affinity and possess beneficial properties that can enhance their role in clinical applications.
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Affiliation(s)
- Raja Mohamed Beema Shafreen
- Department of Biotechnology, Dr. Umayal Ramanathan College for Women, Algappapuram, Karaikudi 630003, India;
| | - Selvaraj Alagu Lakshmi
- Department of Biotechnology, Alagappa University, Science Campus, Karaikudi 630003, India; (S.A.L.); (S.K.P.)
| | - Shunmugiah Karutha Pandian
- Department of Biotechnology, Alagappa University, Science Campus, Karaikudi 630003, India; (S.A.L.); (S.K.P.)
| | - Young-Mo Kim
- Industry Academic Collaboration Foundation, Kwangju Women’s University, Gwangju 62396, Korea;
| | - Joseph Deutsch
- Institute for Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 9112001, Israel; (J.D.); (E.K.)
| | - Elena Katrich
- Institute for Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 9112001, Israel; (J.D.); (E.K.)
| | - Shela Gorinstein
- Institute for Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 9112001, Israel; (J.D.); (E.K.)
- Correspondence: ; Tel.: +972-2-6758690
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Koussih L, Atoui S, Tliba O, Gounni AS. New Insights on the Role of pentraxin-3 in Allergic Asthma. FRONTIERS IN ALLERGY 2021; 2:678023. [PMID: 35387000 PMCID: PMC8974764 DOI: 10.3389/falgy.2021.678023] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 05/06/2021] [Indexed: 11/13/2022] Open
Abstract
Pentraxins are soluble pattern recognition receptors that play a major role in regulating innate immune responses. Through their interaction with complement components, Fcγ receptors, and different microbial moieties, Pentraxins cause an amplification of the inflammatory response. Pentraxin-3 is of particular interest since it was identified as a biomarker for several immune-pathological diseases. In allergic asthma, pentraxin-3 is produced by immune and structural cells and is up-regulated by pro-asthmatic cytokines such as TNFα and IL-1β. Strikingly, some recent experimental evidence demonstrated a protective role of pentraxin-3 in chronic airway inflammatory diseases such as allergic asthma. Indeed, reduced pentraxin-3 levels have been associated with neutrophilic inflammation, Th17 immune response, insensitivity to standard therapeutics and a severe form of the disease. In this review, we will summarize the current knowledge of the role of pentraxin-3 in innate immune response and discuss the protective role of pentraxin-3 in allergic asthma.
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Affiliation(s)
- Latifa Koussih
- Department of Immunology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
- Department des Sciences Experimentales, Universite de Saint-Boniface, Winnipeg, MB, Canada
| | - Samira Atoui
- Department of Immunology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Omar Tliba
- Department of Biomedical Sciences, College of Veterinary Medicine, Long Island University, Brookville, NY, United States
| | - Abdelilah S. Gounni
- Department of Immunology, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
- *Correspondence: Abdelilah S. Gounni
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11
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Cockram TOJ, Dundee JM, Popescu AS, Brown GC. The Phagocytic Code Regulating Phagocytosis of Mammalian Cells. Front Immunol 2021; 12:629979. [PMID: 34177884 PMCID: PMC8220072 DOI: 10.3389/fimmu.2021.629979] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 05/18/2021] [Indexed: 01/21/2023] Open
Abstract
Mammalian phagocytes can phagocytose (i.e. eat) other mammalian cells in the body if they display certain signals, and this phagocytosis plays fundamental roles in development, cell turnover, tissue homeostasis and disease prevention. To phagocytose the correct cells, phagocytes must discriminate which cells to eat using a 'phagocytic code' - a set of over 50 known phagocytic signals determining whether a cell is eaten or not - comprising find-me signals, eat-me signals, don't-eat-me signals and opsonins. Most opsonins require binding to eat-me signals - for example, the opsonins galectin-3, calreticulin and C1q bind asialoglycan eat-me signals on target cells - to induce phagocytosis. Some proteins act as 'self-opsonins', while others are 'negative opsonins' or 'phagocyte suppressants', inhibiting phagocytosis. We review known phagocytic signals here, both established and novel, and how they integrate to regulate phagocytosis of several mammalian targets - including excess cells in development, senescent and aged cells, infected cells, cancer cells, dead or dying cells, cell debris and neuronal synapses. Understanding the phagocytic code, and how it goes wrong, may enable novel therapies for multiple pathologies with too much or too little phagocytosis, such as: infectious disease, cancer, neurodegeneration, psychiatric disease, cardiovascular disease, ageing and auto-immune disease.
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Affiliation(s)
| | | | | | - Guy C. Brown
- Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom
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12
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Bally I, Ancelet S, Reiser JB, Rossi V, Gaboriaud C, Thielens NM. Functional recombinant human complement C1q with different affinity tags. J Immunol Methods 2021; 492:113001. [PMID: 33621564 DOI: 10.1016/j.jim.2021.113001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 02/14/2021] [Accepted: 02/16/2021] [Indexed: 11/24/2022]
Abstract
Complement C1q is a multifunctional protein able to sense pathogens and immune molecules such as immunoglobulins and pentraxins, and to trigger the classical complement pathway through activation of its two associated proteases, C1r and C1s. C1q is a multimeric protein composed of three homologous yet distinct polypeptide chains A, B, and C, each composed of an N-terminal collagen-like sequence and a C-terminal globular gC1q module, that assemble into six heterotrimeric (A-B-C) subunits. This hexameric structure exhibits the characteristic shape of a bouquet of flowers, comprising six collagen-like triple helices, each terminating in a trimeric C-terminal globular head. We have produced previously functional recombinant full-length C1q in stably transfected HEK 293-F cells, with a FLAG tag inserted at the C-terminal end of C1qC chain. We report here the generation of additional recombinant C1q proteins, with a FLAG tag fused to the C-terminus of C1qA or C1qB chains, or to the N-terminus of the C1qC chain. Two other variants harboring a Myc or a 6-His tag at the C-terminal end of C1qC were also produced. We show that all C1q variants, except for the His-tagged protein, can be produced at comparable yields and are able to bind with similar affinities to either IgM, a ligand of the globular regions, or to the C1r2-C1s2 tetramer, and to trigger IgM-mediated serum complement activation. These new recombinant C1q variants provide additional tools to investigate the multiple functions of C1q.
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Affiliation(s)
- Isabelle Bally
- Univ. Grenoble Alpes, CEA, CNRS, IBS, F-38000 Grenoble, France
| | - Sarah Ancelet
- Univ. Grenoble Alpes, CEA, CNRS, IBS, F-38000 Grenoble, France
| | | | - Véronique Rossi
- Univ. Grenoble Alpes, CEA, CNRS, IBS, F-38000 Grenoble, France
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13
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Zarantonello A, Pedersen H, Laursen NS, Andersen GR. Nanobodies Provide Insight into the Molecular Mechanisms of the Complement Cascade and Offer New Therapeutic Strategies. Biomolecules 2021; 11:biom11020298. [PMID: 33671302 PMCID: PMC7922070 DOI: 10.3390/biom11020298] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/10/2021] [Accepted: 02/11/2021] [Indexed: 01/22/2023] Open
Abstract
The complement system is part of the innate immune response, where it provides immediate protection from infectious agents and plays a fundamental role in homeostasis. Complement dysregulation occurs in several diseases, where the tightly regulated proteolytic cascade turns offensive. Prominent examples are atypical hemolytic uremic syndrome, paroxysmal nocturnal hemoglobinuria and Alzheimer’s disease. Therapeutic intervention targeting complement activation may allow treatment of such debilitating diseases. In this review, we describe a panel of complement targeting nanobodies that allow modulation at different steps of the proteolytic cascade, from the activation of the C1 complex in the classical pathway to formation of the C5 convertase in the terminal pathway. Thorough structural and functional characterization has provided a deep mechanistic understanding of the mode of inhibition for each of the nanobodies. These complement specific nanobodies are novel powerful probes for basic research and offer new opportunities for in vivo complement modulation.
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Affiliation(s)
- Alessandra Zarantonello
- Department of Molecular Biology and Genetics, Aarhus University, 8000 Aarhus, Denmark; (A.Z.); (H.P.)
| | - Henrik Pedersen
- Department of Molecular Biology and Genetics, Aarhus University, 8000 Aarhus, Denmark; (A.Z.); (H.P.)
| | - Nick S. Laursen
- Department of Biomedicine, Aarhus University, 8000 Aarhus, Denmark;
| | - Gregers R. Andersen
- Department of Molecular Biology and Genetics, Aarhus University, 8000 Aarhus, Denmark; (A.Z.); (H.P.)
- Correspondence: ; Tel.: +45-30256646
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14
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Qiu C, Han Y, Zhang H, Liu T, Hou H, Luo D, Yu M, Bian K, Zhao Y, Xiao X. Perspectives on long pentraxin 3 and rheumatoid arthritis: several potential breakthrough points relying on study foundation of the past. Int J Med Sci 2021; 18:1886-1898. [PMID: 33746606 PMCID: PMC7976587 DOI: 10.7150/ijms.54787] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 01/24/2021] [Indexed: 12/27/2022] Open
Abstract
Rheumatoid arthritis (RA) is a systemic chronic autoimmune inflammatory disease which is mainly characterized by synovitis and results in a severe burden for both the individual and society. To date, the underlying mechanisms of RA are still poorly understood. Pentraxin 3 (PTX3) is a typical long pentraxin protein which has been highly conserved during evolution. Meanwhile, functions as well as properties of PTX3 have been extensively studied. Several studies identified that PTX3 plays a predominate role in infection, inflammation, immunity and tumor. Interestingly, PTX3 has also been verified to be closely associated with development of RA. We therefore accomplished an elaboration of the relationships between PTX3 and RA. Herein, we mainly focus on the associated cell types and cognate cytokines involved in RA, in combination with PTX3. This review infers the insight into the interaction of PTX3 in RA and aims to provide novel clues for potential therapeutic target of RA in clinic.
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Affiliation(s)
- Cheng Qiu
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan 250014, Shandong, P. R. China.,Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, P. R. China.,Department of Orthopaedic Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, P. R. China
| | - Yichao Han
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan 250014, Shandong, P. R. China.,Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, P. R. China
| | - Hanwen Zhang
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan 250014, Shandong, P. R. China.,Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, P. R. China
| | - Tianyi Liu
- Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, P. R. China
| | - Haodong Hou
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan 250014, Shandong, P. R. China.,Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, P. R. China
| | - Dan Luo
- College of Stomatology, Qingdao University, Qingdao 266071, Shandong, P. R. China
| | - Mingzhi Yu
- Key Laboratory of High Efficiency and Clean Manufacturing, School of Mechanical Engineering, Shandong University, Jinan 250061, Shandong, P. R. China
| | - Kai Bian
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan 250014, Shandong, P. R. China.,Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, P. R. China
| | - Yunpeng Zhao
- Department of Orthopaedic Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan 250012, Shandong, P. R. China
| | - Xing Xiao
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan 250014, Shandong, P. R. China
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15
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Mohmmad‐Rezaei M, Arefnezhad R, Ahmadi R, Abdollahpour‐Alitappeh M, Mirzaei Y, Arjmand M, Ferns GA, Bashash D, Bagheri N. An overview of the innate and adaptive immune system in atherosclerosis. IUBMB Life 2020. [DOI: 10.1002/iub.2425] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Mina Mohmmad‐Rezaei
- Cellular and Molecular Research Center, Basic Health Sciences Institute Shahrekord University of Medical Sciences Shahrekord Iran
| | - Reza Arefnezhad
- Halal Research Center of IRI, FDA Tehran Iran
- Department of Anatomy, School of Medicine Shiraz University of Medical Sciences Shiraz Iran
| | - Reza Ahmadi
- Clinical Biochemistry Research Center, Basic Health Sciences Institute Shahrekord University of Medical Sciences Shahrekord Iran
| | | | - Yousef Mirzaei
- Department of Biogeosciences, Scientific Research Center Soran University Soran Iraq
| | - Mohammad‐Hassan Arjmand
- Cellular and Molecular Research Center, Basic Health Sciences Institute Shahrekord University of Medical Sciences Shahrekord Iran
- Cancer Research Center Shahrekord University of Medical Sciences Shahrekord Iran
| | - Gordon A. Ferns
- Brighton & Sussex Medical School, Division of Medical Education Sussex United Kingdom
| | - Davood Bashash
- Department of Hematology and Blood Banking, School of Allied Medical Sciences Shahid Beheshti University of Medical Sciences Tehran Iran
| | - Nader Bagheri
- Cellular and Molecular Research Center, Basic Health Sciences Institute Shahrekord University of Medical Sciences Shahrekord Iran
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16
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Yaacobi Shilo D, Ben Assayag E, Berliner S, Saranga H, Shilo L, Kesler A. The Usefulness of the Erythrocyte Sedimentation Rate and C-reactive Protein for the Differential Diagnosis of Non-Arteritic Anterior Ischemic Optic Neuropathy in the Era of Microinflammation. Ocul Immunol Inflamm 2020; 30:439-443. [PMID: 32946299 DOI: 10.1080/09273948.2020.1800750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
PURPOSE The presence of a microinflammatory response is one of the possible pathological mechanisms related to the development of nonarteritic anterior ischemic optic neuropathy (NAAION), a common cause of optic neuropathy in old age.We tested whether individuals with NAAION harbor a heightened microinflammatory response compared to controls. METHODS We measured the erythrocyte sedimentation rate (ESR) and high sensitivity C-reactive protein (hs-CRP) in NAAION patients during hospital admission and in four matched controls for each patient, retrieved from a large cohort of 20,000 apparently healthy individuals. RESULTS We included 128 NAAION patients and 512 controls. No significant differences were found between patients and controls regarding the inflammatory biomarkers. CONCLUSIONS This is the first report showing a lack of difference in ESR and hs-CRP levels between NAAION patients and matched controls, suggesting NAAION is not associated with a heightened inflammatory response, such as the one associated with multiple atherothrombotic risk factors.
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Affiliation(s)
- Dafna Yaacobi Shilo
- Department of Plastic Surgery & Burns, Rabin Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Einor Ben Assayag
- Department of Neurology, Tel Aviv Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Shlomo Berliner
- Department of Internal Medicine 'D', Tel Aviv Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Hila Saranga
- Department of Internal Medicine 'D', Tel Aviv Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Lotan Shilo
- Department of Internal Medicine 'C', Meir Hospital, Sapir Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Anat Kesler
- Department of Ophthalmology, Tel Aviv Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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17
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Laursen NS, Pedersen DV, Gytz H, Zarantonello A, Bernth Jensen JM, Hansen AG, Thiel S, Andersen GR. Functional and Structural Characterization of a Potent C1q Inhibitor Targeting the Classical Pathway of the Complement System. Front Immunol 2020; 11:1504. [PMID: 32849513 PMCID: PMC7396675 DOI: 10.3389/fimmu.2020.01504] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 06/09/2020] [Indexed: 12/30/2022] Open
Abstract
The classical pathway of complement is important for protection against pathogens and in maintaining tissue homeostasis, but excessive or aberrant activation is directly linked to numerous pathologies. We describe the development and in vitro characterization of C1qNb75, a single domain antibody (nanobody) specific for C1q, the pattern recognition molecule of the classical pathway. C1qNb75 binds to the globular head modules of human C1q with sub-nanomolar affinity and impedes classical pathway mediated hemolysis by IgG and IgM. Crystal structure analysis revealed that C1qNb75 recognizes an epitope primarily located in the C1q B-chain that overlaps with the binding sites of IgG and IgM. Thus, C1qNb75 competitively prevents C1q from binding to IgG and IgM causing blockade of complement activation by the classical pathway. Overall, C1qNb75 represents a high-affinity nanobody-based inhibitor of IgG- and IgM-mediated activation of the classical pathway and may serve as a valuable reagent in mechanistic and functional studies of complement, and as an efficient inhibitor of complement under conditions of excessive CP activation.
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Affiliation(s)
- Nick S Laursen
- Department of Molecular Biology and Genetics, Center for Structural Biology, Aarhus University, Aarhus, Denmark
| | - Dennis V Pedersen
- Department of Molecular Biology and Genetics, Center for Structural Biology, Aarhus University, Aarhus, Denmark
| | - Heidi Gytz
- Department of Molecular Biology and Genetics, Center for Structural Biology, Aarhus University, Aarhus, Denmark
| | - Alessandra Zarantonello
- Department of Molecular Biology and Genetics, Center for Structural Biology, Aarhus University, Aarhus, Denmark
| | | | | | - Steffen Thiel
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Gregers R Andersen
- Department of Molecular Biology and Genetics, Center for Structural Biology, Aarhus University, Aarhus, Denmark
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18
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Krukonis ES, Thomson JJ. Complement evasion mechanisms of the systemic pathogens Yersiniae and Salmonellae. FEBS Lett 2020; 594:2598-2620. [DOI: 10.1002/1873-3468.13771] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 03/04/2020] [Accepted: 03/05/2020] [Indexed: 01/12/2023]
Affiliation(s)
- Eric S. Krukonis
- Division of Integrated Biomedical Sciences University of Detroit Mercy School of Dentistry Detroit MI USA
| | - Joshua J. Thomson
- Division of Integrated Biomedical Sciences University of Detroit Mercy School of Dentistry Detroit MI USA
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19
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Roumenina LT, Daugan MV, Noé R, Petitprez F, Vano YA, Sanchez-Salas R, Becht E, Meilleroux J, Clec'h BL, Giraldo NA, Merle NS, Sun CM, Verkarre V, Validire P, Selves J, Lacroix L, Delfour O, Vandenberghe I, Thuilliez C, Keddani S, Sakhi IB, Barret E, Ferré P, Corvaïa N, Passioukov A, Chetaille E, Botto M, de Reynies A, Oudard SM, Mejean A, Cathelineau X, Sautès-Fridman C, Fridman WH. Tumor Cells Hijack Macrophage-Produced Complement C1q to Promote Tumor Growth. Cancer Immunol Res 2019; 7:1091-1105. [PMID: 31164356 DOI: 10.1158/2326-6066.cir-18-0891] [Citation(s) in RCA: 135] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 03/01/2019] [Accepted: 05/30/2019] [Indexed: 11/16/2022]
Abstract
Clear-cell renal cell carcinoma (ccRCC) possesses an unmet medical need, particularly at the metastatic stage, when surgery is ineffective. Complement is a key factor in tissue inflammation, favoring cancer progression through the production of complement component 5a (C5a). However, the activation pathways that generate C5a in tumors remain obscure. By data mining, we identified ccRCC as a cancer type expressing concomitantly high expression of the components that are part of the classical complement pathway. To understand how the complement cascade is activated in ccRCC and impacts patients' clinical outcome, primary tumors from three patient cohorts (n = 106, 154, and 43), ccRCC cell lines, and tumor models in complement-deficient mice were used. High densities of cells producing classical complement pathway components C1q and C4 and the presence of C4 activation fragment deposits in primary tumors correlated with poor prognosis. The in situ orchestrated production of C1q by tumor-associated macrophages (TAM) and C1r, C1s, C4, and C3 by tumor cells associated with IgG deposits, led to C1 complex assembly, and complement activation. Accordingly, mice deficient in C1q, C4, or C3 displayed decreased tumor growth. However, the ccRCC tumors infiltrated with high densities of C1q-producing TAMs exhibited an immunosuppressed microenvironment, characterized by high expression of immune checkpoints (i.e., PD-1, Lag-3, PD-L1, and PD-L2). Our data have identified the classical complement pathway as a key inflammatory mechanism activated by the cooperation between tumor cells and TAMs, favoring cancer progression, and highlight potential therapeutic targets to restore an efficient immune reaction to cancer.
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Affiliation(s)
- Lubka T Roumenina
- INSERM, UMR_S 1138, Cordeliers Research Center, Team "Complement and diseases", Paris, France. .,Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,Cordeliers Research Center, Sorbonne University, Paris, France
| | - Marie V Daugan
- INSERM, UMR_S 1138, Cordeliers Research Center, Team "Complement and diseases", Paris, France.,Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,Cordeliers Research Center, Sorbonne University, Paris, France
| | - Rémi Noé
- INSERM, UMR_S 1138, Cordeliers Research Center, Team "Complement and diseases", Paris, France.,Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,Cordeliers Research Center, Sorbonne University, Paris, France
| | - Florent Petitprez
- Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,Cordeliers Research Center, Sorbonne University, Paris, France.,INSERM, UMR_S 1138, Cordeliers Research Center, Team "Cancer, Immune Control and Escape", Paris, France.,Programme Cartes d'Identité des Tumeurs, Ligue Nationale contre le Cancer, Paris, France
| | - Yann A Vano
- Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,Cordeliers Research Center, Sorbonne University, Paris, France.,INSERM, UMR_S 1138, Cordeliers Research Center, Team "Cancer, Immune Control and Escape", Paris, France.,Department of Oncology, Georges Pompidou European Hospital, Assistance Publique Hopitaux de Paris, Paris, France
| | | | - Etienne Becht
- Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,Cordeliers Research Center, Sorbonne University, Paris, France.,INSERM, UMR_S 1138, Cordeliers Research Center, Team "Cancer, Immune Control and Escape", Paris, France
| | - Julie Meilleroux
- INSERM, UMR_S 1138, Cordeliers Research Center, Team "Complement and diseases", Paris, France.,Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,INSERM, UMR_S 1138, Cordeliers Research Center, Team "Cancer, Immune Control and Escape", Paris, France.,Department of Pathology, Institut Universitaire du Cancer Toulouse - Oncopole, Toulouse, France
| | - Bénédicte Le Clec'h
- INSERM, UMR_S 1138, Cordeliers Research Center, Team "Complement and diseases", Paris, France.,Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,INSERM, UMR_S 1138, Cordeliers Research Center, Team "Cancer, Immune Control and Escape", Paris, France
| | - Nicolas A Giraldo
- Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,Cordeliers Research Center, Sorbonne University, Paris, France.,INSERM, UMR_S 1138, Cordeliers Research Center, Team "Cancer, Immune Control and Escape", Paris, France
| | - Nicolas S Merle
- INSERM, UMR_S 1138, Cordeliers Research Center, Team "Complement and diseases", Paris, France.,Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,Cordeliers Research Center, Sorbonne University, Paris, France
| | - Cheng-Ming Sun
- Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,Cordeliers Research Center, Sorbonne University, Paris, France.,INSERM, UMR_S 1138, Cordeliers Research Center, Team "Cancer, Immune Control and Escape", Paris, France
| | - Virginie Verkarre
- Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,Department of Pathology, Georges Pompidou European Hospital, Assistance Publique Hopitaux de Paris, Paris, France
| | - Pierre Validire
- Department of Pathology, Institut Mutualiste Montsouris, Paris, France
| | - Janick Selves
- Department of Pathology, Institut Universitaire du Cancer Toulouse - Oncopole, Toulouse, France
| | - Laetitia Lacroix
- Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,Cordeliers Research Center, Sorbonne University, Paris, France.,INSERM, UMR_S 1138, Cordeliers Research Center, Team "Cancer, Immune Control and Escape", Paris, France
| | | | | | | | - Sonia Keddani
- INSERM, UMR_S 1138, Cordeliers Research Center, Team "Complement and diseases", Paris, France.,Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,Cordeliers Research Center, Sorbonne University, Paris, France
| | - Imene B Sakhi
- INSERM, UMR_S 1138, Cordeliers Research Center, Team "Complement and diseases", Paris, France.,Cordeliers Research Center, Sorbonne University, Paris, France
| | - Eric Barret
- Department of Urology, Institut Mutualiste Montsouris, Paris, France
| | - Pierre Ferré
- Pierre Fabre Research Institute, Toulouse, France
| | | | | | | | - Marina Botto
- Department of Medicine, Imperial College London, London, United Kingdom
| | - Aurélien de Reynies
- Programme Cartes d'Identité des Tumeurs, Ligue Nationale contre le Cancer, Paris, France
| | - Stephane Marie Oudard
- Department of Oncology, Georges Pompidou European Hospital, Assistance Publique Hopitaux de Paris, Paris, France
| | - Arnaud Mejean
- Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,Department of Urology, Georges Pompidou European Hospital, Assistance Publique Hopitaux de Paris, Paris, France
| | - Xavier Cathelineau
- Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,Department of Urology, Institut Mutualiste Montsouris, Paris, France
| | - Catherine Sautès-Fridman
- Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France.,Cordeliers Research Center, Sorbonne University, Paris, France.,INSERM, UMR_S 1138, Cordeliers Research Center, Team "Cancer, Immune Control and Escape", Paris, France
| | - Wolf H Fridman
- Sorbonne Paris Cite, Cordeliers Research Center, University Paris Descartes Paris 5, Paris, France. .,Cordeliers Research Center, Sorbonne University, Paris, France.,INSERM, UMR_S 1138, Cordeliers Research Center, Team "Cancer, Immune Control and Escape", Paris, France
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20
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Li Y, Niu D, Bai Y, Lan T, Peng M, Dong Z, Li J. Characterization of the ScghC1q-1 gene in Sinonovacula constricta and its role in innate immune responses. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2019; 94:16-21. [PMID: 30641118 DOI: 10.1016/j.dci.2019.01.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 01/09/2019] [Accepted: 01/09/2019] [Indexed: 06/09/2023]
Abstract
C1q is an important immune gene that can mediate a variety of immune regulatory functions, and is involved in complement pathway activation. In the present study, a ghC1q gene from the razor clam Sinonovacula constricta was identified and named ScghC1q-1. The complete ScghC1q-1 gene is 692 bp in length, with an open reading frame (ORF) of 489 bp encoding a protein of 162 amino acids. ScghC1q-1 mRNA was widely expressed in various tissues, and transcript levels in the hemolymph were significantly up-regulated following Staphylococcus aureus or Vibrio anguillarum challenge. Recombinant ScghC1q-1 protein was found to agglutinate both Gram-positive and Gram-negative bacteria. These results indicate that ScghC1q-1 plays an essential role in the immune defense of S. constricta.
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Affiliation(s)
- Yan Li
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China
| | - Donghong Niu
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, 201306, China.
| | - Yuqi Bai
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China
| | - Tianyi Lan
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China
| | - Maoxiao Peng
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China
| | - Zhiguo Dong
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Huaihai Institute of Technology, Lianyungang, 222005, China
| | - Jiale Li
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China; Shanghai Engineering Research Center of Aquaculture, Shanghai, 201306, China.
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21
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Mahendra A, Yang X, Abnouf S, Adolacion JRT, Park D, Soomro S, Roszik J, Coarfa C, Romain G, Wanzeck K, Bridges SL, Aggarwal A, Qiu P, Agarwal SK, Mohan C, Varadarajan N. Beyond Autoantibodies: Biologic Roles of Human Autoreactive B Cells in Rheumatoid Arthritis Revealed by RNA-Sequencing. Arthritis Rheumatol 2019; 71:529-541. [PMID: 30407753 PMCID: PMC6741783 DOI: 10.1002/art.40772] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 11/01/2018] [Indexed: 12/15/2022]
Abstract
OBJECTIVE To obtain the comprehensive transcriptome profile of human citrulline-specific B cells from patients with rheumatoid arthritis (RA). METHODS Citrulline- and hemagglutinin-specific B cells were sorted by flow cytometry using peptide-streptavidin conjugates from the peripheral blood of RA patients and healthy individuals. The transcriptome profile of the sorted cells was obtained by RNA-sequencing, and expression of key protein molecules was evaluated by aptamer-based SOMAscan assay and flow cytometry. The ability of these proteins to effect differentiation of osteoclasts and proliferation and migration of synoviocytes was examined by in vitro functional assays. RESULTS Citrulline-specific B cells, in comparison to citrulline-negative B cells, from patients with RA differentially expressed the interleukin-15 receptor α (IL-15Rα) gene as well as genes related to protein citrullination and cyclic AMP signaling. In analyses of an independent cohort of cyclic citrullinated peptide-seropositive RA patients, the expression of IL-15Rα protein was enriched in citrulline-specific B cells from the patients' peripheral blood, and surprisingly, all B cells from RA patients were capable of producing the epidermal growth factor ligand amphiregulin (AREG). Production of AREG directly led to increased migration and proliferation of fibroblast-like synoviocytes, and, in combination with anti-citrullinated protein antibodies, led to the increased differentiation of osteoclasts. CONCLUSION To the best of our knowledge, this is the first study to document the whole transcriptome profile of autoreactive B cells in any autoimmune disease. These data identify several genes and pathways that may be targeted by repurposing several US Food and Drug Administration-approved drugs, and could serve as the foundation for the comparative assessment of B cell profiles in other autoimmune diseases.
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Affiliation(s)
- Ankit Mahendra
- Department of Chemical & Biomolecular Engineering, University of Houston, Houston, TX
| | - Xingyu Yang
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia
| | - Shaza Abnouf
- Department of Chemical & Biomolecular Engineering, University of Houston, Houston, TX
| | - Jay R T Adolacion
- Department of Chemical & Biomolecular Engineering, University of Houston, Houston, TX
| | - Daechan Park
- Department of Biological Sciences, College of Natural Sciences, Ajou University, Republic of Korea
| | - Sanam Soomro
- Department of Biomedical Engineering, University of Houston, Houston, TX
| | - Jason Roszik
- Department of Melanoma Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX
| | - Cristian Coarfa
- Department of Molecular and Cell Biology, Baylor College of Medicine, Houston, TX
| | - Gabrielle Romain
- Department of Chemical & Biomolecular Engineering, University of Houston, Houston, TX
| | - Keith Wanzeck
- Division of Clinical Immunology & Rheumatology, University of Alabama at Birmingham, Birmingham, AL
| | - S. Louis Bridges
- Division of Clinical Immunology & Rheumatology, University of Alabama at Birmingham, Birmingham, AL
| | - Amita Aggarwal
- Department of Clinical Immunology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
| | - Peng Qiu
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia
| | - Sandeep K Agarwal
- Section of Immunology, Allergy and Immunology, Department of Medicine, Baylor College of Medicine, Houston, TX
| | - Chandra Mohan
- Department of Biomedical Engineering, University of Houston, Houston, TX
| | - Navin Varadarajan
- Department of Chemical & Biomolecular Engineering, University of Houston, Houston, TX
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22
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Bally I, Inforzato A, Dalonneau F, Stravalaci M, Bottazzi B, Gaboriaud C, Thielens NM. Interaction of C1q With Pentraxin 3 and IgM Revisited: Mutational Studies With Recombinant C1q Variants. Front Immunol 2019; 10:461. [PMID: 30923526 PMCID: PMC6426777 DOI: 10.3389/fimmu.2019.00461] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 02/20/2019] [Indexed: 12/02/2022] Open
Abstract
Pentraxins and complement defense collagens are soluble recognition proteins that sense pathogens and altered-self elements, and trigger immune responses including complement activation. PTX3 has been shown to interact with the globular recognition domains (gC1q) of the C1q protein of the classical complement pathway, thereby modulating complement activity. The C1q-PTX3 interaction has been characterized previously by site-specific mutagenesis using individual gC1q domains of each of the three C1q chains. The present study is aimed at revisiting this knowledge taking advantage of full-length recombinant C1q. Four mutations targeting exposed amino acid residues in the gC1q domain of each of the C1q chains (LysA200Asp-LysA201Asp, ArgB108Asp-ArgB109Glu, TyrB175Leu, and LysC170Glu) were introduced in recombinant C1q and the interaction properties of the mutants were analyzed using surface plasmon resonance. All C1q mutants retained binding to C1r and C1s proteases and mannose-binding lectin-associated serine proteases, indicating that the mutations did not affect the function of the collagen-like regions of C1q. The effect of these mutations on the interaction of C1q with PTX3 and IgM, and both the PTX3- and IgM-mediated activation of the classical complement pathway were investigated. The LysA200Asp-LysA201Asp and LysC170Glu mutants retained partial interaction with PTX3 and IgM, however they triggered efficient complement activation. In contrast, the ArgB108Asp-ArgB109Glu mutation abolished C1q binding to PTX3 and IgM, and significantly decreased complement activation. The TyrB175Leu mutant exhibited decreased PTX3- and IgM-dependent complement activation. Therefore, we provided evidence that, in the context of the full length C1q protein, a key contribution to the interaction with both PTX3 and IgM is given by the B chain Arg residues that line the side of the gC1q heterotrimer, with a minor participation of a Lys residue located at the apex of gC1q. Furthermore, we generated recombinant forms of the human PTX3 protein bearing either D or A at position 48, a polymorphic site of clinical relevance in a number of infections, and observed that both allelic variants equally recognized C1q.
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Affiliation(s)
- Isabelle Bally
- Université Grenoble Alpes, CEA, CNRS, IBS, Grenoble, France
| | - Antonio Inforzato
- Humanitas Clinical and Research Center, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
| | | | - Matteo Stravalaci
- Humanitas Clinical and Research Center, Rozzano, Italy.,Department of Biomedical Sciences, Humanitas University, Pieve Emanuele, Italy
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23
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Garlanda C, Bottazzi B, Magrini E, Inforzato A, Mantovani A. PTX3, a Humoral Pattern Recognition Molecule, in Innate Immunity, Tissue Repair, and Cancer. Physiol Rev 2018; 98:623-639. [PMID: 29412047 DOI: 10.1152/physrev.00016.2017] [Citation(s) in RCA: 124] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Innate immunity includes a cellular and a humoral arm. PTX3 is a fluid-phase pattern recognition molecule conserved in evolution which acts as a key component of humoral innate immunity in infections of fungal, bacterial, and viral origin. PTX3 binds conserved microbial structures and self-components under conditions of inflammation and activates effector functions (complement, phagocytosis). Moreover, it has a complex regulatory role in inflammation, such as ischemia/reperfusion injury and cancer-related inflammation, as well as in extracellular matrix organization and remodeling, with profound implications in physiology and pathology. Finally, PTX3 acts as an extrinsic oncosuppressor gene by taming tumor-promoting inflammation in murine and selected human tumors. Thus evidence suggests that PTX3 is a key homeostatic component at the crossroad of innate immunity, inflammation, tissue repair, and cancer. Dissecting the complexity of PTX3 pathophysiology and human genetics paves the way to diagnostic and therapeutic exploitation.
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Affiliation(s)
- Cecilia Garlanda
- Humanitas Clinical and Research Center, Rozzano, Milan , Italy ; Humanitas University, Rozzano, Milan , Italy ; Department of Medical Biotechnologies and Translational Medicine, University of Milan , Milan , Italy ; and The William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
| | - Barbara Bottazzi
- Humanitas Clinical and Research Center, Rozzano, Milan , Italy ; Humanitas University, Rozzano, Milan , Italy ; Department of Medical Biotechnologies and Translational Medicine, University of Milan , Milan , Italy ; and The William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
| | - Elena Magrini
- Humanitas Clinical and Research Center, Rozzano, Milan , Italy ; Humanitas University, Rozzano, Milan , Italy ; Department of Medical Biotechnologies and Translational Medicine, University of Milan , Milan , Italy ; and The William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
| | - Antonio Inforzato
- Humanitas Clinical and Research Center, Rozzano, Milan , Italy ; Humanitas University, Rozzano, Milan , Italy ; Department of Medical Biotechnologies and Translational Medicine, University of Milan , Milan , Italy ; and The William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
| | - Alberto Mantovani
- Humanitas Clinical and Research Center, Rozzano, Milan , Italy ; Humanitas University, Rozzano, Milan , Italy ; Department of Medical Biotechnologies and Translational Medicine, University of Milan , Milan , Italy ; and The William Harvey Research Institute, Queen Mary University of London, London, United Kingdom
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24
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Abstract
Synaptic pruning is dominant in early ontogenesis when a large number of unnecessary synapses are eliminated, and it maintains synaptic plasticity in the mature healthy brain, e.g., in memory processes. Its malfunction is involved in degenerative diseases such as Alzheimer’s disease. C1q, a member of the immune complement system, plays a central role in the selective pruning of synapses by microglial phagocytosis. Understanding the molecular aspects of complement-mediated synapse elimination is of high importance for developing effective therapeutic interventions in the future. Our analysis on C1q-tagged synaptosomes revealed that C1q label-based synaptic pruning is linked to local apoptotic-like processes in synapses. C1q, a member of the immune complement cascade, is implicated in the selective pruning of synapses by microglial phagocytosis. C1q-mediated synapse elimination has been shown to occur during brain development, while increased activation and complement-dependent synapse loss is observed in neurodegenerative diseases. However, the molecular mechanisms underlying C1q-controlled synaptic pruning are mostly unknown. This study addresses distortions in the synaptic proteome leading to C1q-tagged synapses. Our data demonstrated the preferential localization of C1q to the presynapse. Proteomic investigation and pathway analysis of C1q-tagged synaptosomes revealed the presence of apoptotic-like processes in C1q-tagged synapses, which was confirmed experimentally with apoptosis markers. Moreover, the induction of synaptic apoptotic-like mechanisms in a model of sensory deprivation-induced synaptic depression led to elevated C1q levels. Our results unveiled that C1q label-based synaptic pruning is triggered by and directly linked to apoptotic-like processes in the synaptic compartment.
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25
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Ugurlar D, Howes SC, de Kreuk BJ, Koning RI, de Jong RN, Beurskens FJ, Schuurman J, Koster AJ, Sharp TH, Parren PWHI, Gros P. Structures of C1-IgG1 provide insights into how danger pattern recognition activates complement. Science 2018; 359:794-797. [PMID: 29449492 DOI: 10.1126/science.aao4988] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 01/10/2018] [Indexed: 01/10/2023]
Abstract
Danger patterns on microbes or damaged host cells bind and activate C1, inducing innate immune responses and clearance through the complement cascade. How these patterns trigger complement initiation remains elusive. Here, we present cryo-electron microscopy analyses of C1 bound to monoclonal antibodies in which we observed heterogeneous structures of single and clustered C1-immunoglobulin G1 (IgG1) hexamer complexes. Distinct C1q binding sites are observed on the two Fc-CH2 domains of each IgG molecule. These are consistent with known interactions and also reveal additional interactions, which are supported by functional IgG1-mutant analysis. Upon antibody binding, the C1q arms condense, inducing rearrangements of the C1r2s2 proteases and tilting C1q's cone-shaped stalk. The data suggest that C1r may activate C1s within single, strained C1 complexes or between neighboring C1 complexes on surfaces.
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Affiliation(s)
- Deniz Ugurlar
- Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research, Department of Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, Netherlands
| | - Stuart C Howes
- Section of Electron Microscopy, Department of Molecular Cell Biology, Leiden University Medical Center, Einthovenweg 20, 2300 RC Leiden, Netherlands
| | | | - Roman I Koning
- Section of Electron Microscopy, Department of Molecular Cell Biology, Leiden University Medical Center, Einthovenweg 20, 2300 RC Leiden, Netherlands.,NeCEN, Gorlaeus Laboratories, Leiden University, 2333 CC Leiden, Netherlands
| | | | | | | | - Abraham J Koster
- Section of Electron Microscopy, Department of Molecular Cell Biology, Leiden University Medical Center, Einthovenweg 20, 2300 RC Leiden, Netherlands.,NeCEN, Gorlaeus Laboratories, Leiden University, 2333 CC Leiden, Netherlands
| | - Thomas H Sharp
- Section of Electron Microscopy, Department of Molecular Cell Biology, Leiden University Medical Center, Einthovenweg 20, 2300 RC Leiden, Netherlands.
| | - Paul W H I Parren
- Genmab, Yalelaan 60, 3584 CM Utrecht, Netherlands. .,Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, Albinusdreef 2, 2333 ZA Leiden, Netherlands
| | - Piet Gros
- Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research, Department of Chemistry, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, Netherlands.
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26
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Dantas E, Erra Díaz F, Pereyra Gerber P, Merlotti A, Varese A, Ostrowski M, Sabatté J, Geffner J. Low pH impairs complement-dependent cytotoxicity against IgG-coated target cells. Oncotarget 2018; 7:74203-74216. [PMID: 27716623 PMCID: PMC5342046 DOI: 10.18632/oncotarget.12412] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Accepted: 09/20/2016] [Indexed: 12/25/2022] Open
Abstract
Local acidosis is a common feature of allergic, vascular, autoimmune, and cancer diseases. However, few studies have addressed the effect of extracellular pH on the immune response. Here, we analyzed whether low pH could modulate complement-dependent cytotoxicity (CDC) against IgG-coated cells. Using human serum as a complement source, we found that extracellular pH values of 5.5 and 6.0 strongly inhibit CDC against either B lymphoblast cell lines coated with the chimeric anti-CD20 mAb rituximab or PBMCs coated with the humanized anti-CD52 mAb alemtuzumab. Suppression of CDC by low pH was observed either in cells suspended in culture medium or in whole blood assays. Interestingly, not only CDC against IgG-coated cells, but also the activation of the complement system induced by the alternative and lectin pathways was prevented by low pH. Tumor-targeting mAbs represent one of the most successful tools for cancer therapy, however, the use of mAb monotherapy has only modest effects on solid tumors. Our present results suggest that severe acidosis, a hallmark of solid tumors, might impair complement-mediated tumor destruction directed by mAb.
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Affiliation(s)
- Ezequiel Dantas
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), CONICET, Facultad de Medicina, Universidad de Buenos Aires, Argentina
| | - Fernando Erra Díaz
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), CONICET, Facultad de Medicina, Universidad de Buenos Aires, Argentina
| | - Pehuén Pereyra Gerber
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), CONICET, Facultad de Medicina, Universidad de Buenos Aires, Argentina
| | - Antonela Merlotti
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), CONICET, Facultad de Medicina, Universidad de Buenos Aires, Argentina
| | - Augusto Varese
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), CONICET, Facultad de Medicina, Universidad de Buenos Aires, Argentina
| | - Matías Ostrowski
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), CONICET, Facultad de Medicina, Universidad de Buenos Aires, Argentina
| | - Juan Sabatté
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), CONICET, Facultad de Medicina, Universidad de Buenos Aires, Argentina
| | - Jorge Geffner
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), CONICET, Facultad de Medicina, Universidad de Buenos Aires, Argentina
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27
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Ghebrehiwet B, Kandov E, Kishore U, Peerschke EIB. Is the A-Chain the Engine That Drives the Diversity of C1q Functions? Revisiting Its Unique Structure. Front Immunol 2018; 9:162. [PMID: 29459870 PMCID: PMC5807628 DOI: 10.3389/fimmu.2018.00162] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 01/18/2018] [Indexed: 12/27/2022] Open
Abstract
The immunopathological functions associated with human C1q are still growing in terms of novelty, diversity, and pathologic relevance. It is, therefore, not surprising that C1q is being recognized as an important molecular bridge between innate and adaptive immunity. The secret of this functional diversity, in turn, resides in the elegant but complex structure of the C1q molecule, which is assembled from three distinct gene products: A, B, and C, each of which has evolved from a separate and unique ancestral gene template. The C1q molecule is made up of 6A, 6B, and 6C polypeptide chains, which are held together through strong covalent and non-covalent bonds to form the 18-chain, bouquet-of-flower-like protein that we know today. The assembled C1q protein displays at least two distinct structural and functional regions: the collagen-like region (cC1q) and the globular head region (gC1q), each being capable of driving a diverse range of ligand- or receptor-mediated biological functions. What is most intriguing, however, is the observation that most of the functions appear to be predominantly driven by the A-chain of the molecule, which begs the question: what are the evolutionary modifications or rearrangements that singularly shaped the primordial A-chain gene to become a pluripotent and versatile component of the intact C1q molecule? Here, we revisit and discuss some of the known unique structural and functional features of the A-chain, which may have contributed to its versatility.
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Affiliation(s)
- Berhane Ghebrehiwet
- Departments of Medicine, Stony Brook University, Stony Brook, NY, United States
| | - Evelyn Kandov
- Departments of Medicine, Stony Brook University, Stony Brook, NY, United States
| | - Uday Kishore
- Biosciences, College of Health and Life Sciences, Brunel University London, Uxbridge, United Kingdom
| | - Ellinor I B Peerschke
- Department of Laboratory Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY, United States
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28
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Wei X, Yang D, Li H, Jiang H, Liu X, Zhang Q, Yang J. Sialic acid-binding lectins (SABLs) from Solen grandis function as PRRs ensuring immune recognition and bacterial clearance. FISH & SHELLFISH IMMUNOLOGY 2018; 72:477-483. [PMID: 29146448 DOI: 10.1016/j.fsi.2017.11.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 10/31/2017] [Accepted: 11/10/2017] [Indexed: 06/07/2023]
Abstract
Sialic acid-binding lectins (SABLs) are ubiquitous ancient molecules with binding properties to N-acetyl or N-glycolyl carbohydrates, and play crucial roles in both adaptive and innate immune responses. In present study, recombinant protein and antibodies of two SABLs from mollusk Solen grandis (SgSABL-1 and SgSABL-2) were prepared to investigate their functions in innate immunity. The recombinant protein of SgSABL-1 (rSgSABL-1) could bind LPS, PGN and β-glucan in vitro, while rSgSABL-2 could only bind PGN rather than LPS and β-glucan. Be coincident with their PAMPs recognition properties, rSgSABL-1 displayed a broad agglutination spectrum towards gram-positive bacteria Micrococcus luteus, gram-negative bacteria Listonella anguillarum and fungi Pichia pastoris, and rSgSABL-2 only showed remarkable agglutinative effect on M. luteus and L. anguillarum. More importantly, after PAMPs recognition, rSgSABL-1 and rSgSABL-2 enhanced phagocytosis as well as encapsulation ability of hemocytes in vitro, and the enhanced encapsulation could be blocked by specific antibodies. All these results indicated that SgSABL-1 and SgSABL-2 functioned as two compensative pattern-recognition receptor (PRRs) with distinct recognition spectrum and involved in the innate immune response of S. grandis.
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Affiliation(s)
- Xiumei Wei
- Laboratory of Aquatic Comparative Immunology, School of Life Sciences, East China Normal University, Shanghai, 200241, China; Shandong Marine Resource and Environment Research Institute, Yantai 264006, China
| | - Dinglong Yang
- Shandong Marine Resource and Environment Research Institute, Yantai 264006, China
| | - Huiying Li
- Laboratory of Aquatic Comparative Immunology, School of Life Sciences, East China Normal University, Shanghai, 200241, China
| | - Hailin Jiang
- Shandong Marine Resource and Environment Research Institute, Yantai 264006, China
| | - Xiangquan Liu
- Shandong Marine Resource and Environment Research Institute, Yantai 264006, China
| | - Qin Zhang
- Key Laboratory of Marine Biotechnology of Guangxi, Guangxi Institute of Oceanology, Beihai 536000, China.
| | - Jialong Yang
- Laboratory of Aquatic Comparative Immunology, School of Life Sciences, East China Normal University, Shanghai, 200241, China.
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29
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Long pentraxin 3: A novel multifaceted player in cancer. Biochim Biophys Acta Rev Cancer 2017; 1869:53-63. [PMID: 29175552 DOI: 10.1016/j.bbcan.2017.11.004] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Revised: 11/22/2017] [Accepted: 11/22/2017] [Indexed: 01/12/2023]
Abstract
Since its discovery in 1992, long pentraxin 3 (PTX3) has been characterized as soluble patter recognition receptor, a key player of the innate immunity arm with non-redundant functions in pathogen recognition and inflammatory responses. As a component of the extra-cellular matrix milieu, PTX3 has been implicated also in wound healing/tissue remodeling, cardiovascular diseases, fertility, and infectious diseases. Consequently, PTX3 levels in biological fluids have been proposed as a fluid-phase biomarker in different pathological conditions. In the last decade, experimental evidences have shown that PTX3 may exert a significant impact also on different aspects of cancer biology, including tumor onset, angiogenesis, metastatic dissemination and immune-modulation. However, it remains unclear whether PTX3 acts as a good cop or bad cop in cancer. In this review, we will summarize and discuss the scientific literature data focusing on the role of PTX3 in experimental and human tumors, including its putative translational implications.
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30
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Monocyte differentiation and macrophage priming are regulated differentially by pentraxins and their ligands. BMC Immunol 2017; 18:30. [PMID: 28619036 PMCID: PMC5472910 DOI: 10.1186/s12865-017-0214-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 06/08/2017] [Indexed: 01/01/2023] Open
Abstract
Background Circulating bone marrow-derived monocytes can leave the blood, enter a tissue, and differentiate into M1 inflammatory, M2a remodeling/fibrotic, or M2c/Mreg resolving/immune-regulatory macrophages. Macrophages can also convert from one of the above types to another. Pentraxins are secreted proteins that bind to, and promote efficient clearance of, microbial pathogens and cellular debris during infection, inflammation, and tissue damage. The pentraxins C-reactive protein (CRP), serum amyloid P (SAP), and pentraxin-3 (PTX3) can also bind a variety of endogenous ligands. As monocytes and macrophages are exposed to differing concentrations of pentraxins and their ligands during infection, inflammation, and tissue damage, we assessed what effect pentraxins and their ligands have on these cells. Results We found that many polarization markers do not discriminate between the effects of pentraxins and their ligands on macrophages. However, pentraxins, their ligands, and cytokines differentially regulate the expression of the hemoglobin-haptoglobin complex receptor CD163, the sialic acid-binding lectin CD169, and the macrophage mannose receptor CD206. CRP, a pentraxin generally thought of as being pro-inflammatory, increases the extracellular accumulation of the anti-inflammatory cytokine IL-10, and this effect is attenuated by GM-CSF, mannose-binding lectin, and factor H. Conclusions These results suggest that the presence of pentraxins and their ligands regulate macrophage differentiation in the blood and tissues, and that CRP may be a potent inducer of the anti-inflammatory cytokine IL-10. Electronic supplementary material The online version of this article (doi:10.1186/s12865-017-0214-z) contains supplementary material, which is available to authorized users.
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31
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Thielens NM, Tedesco F, Bohlson SS, Gaboriaud C, Tenner AJ. C1q: A fresh look upon an old molecule. Mol Immunol 2017; 89:73-83. [PMID: 28601358 DOI: 10.1016/j.molimm.2017.05.025] [Citation(s) in RCA: 139] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 05/27/2017] [Accepted: 05/29/2017] [Indexed: 12/14/2022]
Abstract
Originally discovered as part of C1, the initiation component of the classical complement pathway, it is now appreciated that C1q regulates a variety of cellular processes independent of complement activation. C1q is a complex glycoprotein assembled from 18 polypeptide chains, with a C-terminal globular head region that mediates recognition of diverse molecular structures, and an N-terminal collagen-like tail that mediates immune effector mechanisms. C1q mediates a variety of immunoregulatory functions considered important in the prevention of autoimmunity such as the enhancement of phagocytosis, regulation of cytokine production by antigen presenting cells, and subsequent alteration in T-lymphocyte maturation. Furthermore, recent advances indicate additional roles for C1q in diverse physiologic and pathologic processes including pregnancy, tissue repair, and cancer. Finally, C1q is emerging as a critical component of neuronal network refinement and homeostatic regulation within the central nervous system. This review summarizes the classical functions of C1q and reviews novel discoveries within the field.
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Affiliation(s)
| | - Francesco Tedesco
- Istituto di Ricovero e Cura a Carattere Scientifico, Istituto Auxologico Italiano, Milan, Italy
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32
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Chen Y, Sha Z, Wu S, Chen S, Zeng Y. Does the different domain in sghC1q protein from Cynoglossus semilaevis perform functions independent? GENE REPORTS 2017. [DOI: 10.1016/j.genrep.2017.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Wang L, Cano M, Datta S, Wei H, Ebrahimi KB, Gorashi Y, Garlanda C, Handa JT. Pentraxin 3 recruits complement factor H to protect against oxidative stress-induced complement and inflammasome overactivation. J Pathol 2017; 240:495-506. [PMID: 27659908 DOI: 10.1002/path.4811] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 06/18/2016] [Accepted: 09/02/2016] [Indexed: 12/21/2022]
Abstract
The discovery that genetic abnormalities in complement factor H (FH) are associated with an increased risk for age-related macular degeneration (AMD), the most common cause of blindness among the elderly, raised hope of new treatments for this vision-threatening disease. Nonetheless, over a decade after the identification of this important association, how innate immunity contributes to AMD remains unresolved. Pentraxin 3 (PTX3), an essential component of the innate immunity system that plays a non-redundant role in controlling inflammation, regulates complement by interacting with complement components. Here, we show that PTX3 is induced by oxidative stress, a known cause of AMD, in the retinal pigmented epithelium (RPE). PTX3 deficiency in vitro and in vivo magnified complement activation induced by oxidative stress, leading to increased C3a, FB, and C3d, but not C5b-9 complex formation. Increased C3a levels, resulting from PTX3 deficiency, raised the levels of Il1b mRNA and secretion of activated interleukin (IL)-1β by interacting with C3aR. Importantly, PTX3 deficiency augmented NLRP3 inflammasome activation, resulting in enhanced IL-1β, but not IL-18, production by the RPE. Thus, in the presence of PTX3 deficiency, the complement and inflammasome pathways worked in concert to produce IL-1β in sufficient abundance to, importantly, result in macrophages accumulating in the choroid. These results demonstrate that PTX3 acts as an essential brake for complement and inflammasome activation by regulating the abundance of FH in the RPE, and provide critical insights into the complex interplay between oxidative stress and innate immunity in the early stages of AMD development. Copyright © 2016 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
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Affiliation(s)
- Lei Wang
- Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore, USA
| | - Marisol Cano
- Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore, USA
| | - Sayantan Datta
- Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore, USA
| | - Hong Wei
- Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore, USA
| | | | - Yara Gorashi
- Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore, USA
| | - Cecilia Garlanda
- Istituto di Ricovero e Cura a Carattere Scientifico-Humanitas Clinical and Research Centre, Milan, Italy
| | - James T Handa
- Wilmer Eye Institute, Johns Hopkins School of Medicine, Baltimore, USA
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Johswich K. Innate immune recognition and inflammation in Neisseria meningitidis infection. Pathog Dis 2017; 75:3059204. [PMID: 28334203 DOI: 10.1093/femspd/ftx022] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 02/23/2017] [Indexed: 01/01/2023] Open
Abstract
Neisseria meningitidis (Nme) can cause meningitis and sepsis, diseases which are characterised by an overwhelming inflammatory response. Inflammation is triggered by host pattern recognition receptors (PRRs) which are activated by pathogen-associated molecular patterns (PAMPs). Nme contains multiple PAMPs including lipooligosaccharide, peptidoglycan, proteins and metabolites. Various classes of PRRs including Toll-like receptors, NOD-like receptors, C-type lectins, scavenger receptors, pentraxins and others are expressed by the host to respond to any given microbe. While Toll-like receptors and NOD-like receptors are pivotal in triggering inflammation, other PRRs act as modulators of inflammation or aid in functional antimicrobial responses such as phagocytosis or complement activation. This review aims to give an overview of the various Nme PAMPs reported to date, the PRRs they activate and their implications during the inflammatory response to infection.
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Transitional changes in the CRP structure lead to the exposure of proinflammatory binding sites. Nat Commun 2017; 8:14188. [PMID: 28112148 PMCID: PMC5264208 DOI: 10.1038/ncomms14188] [Citation(s) in RCA: 142] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 12/07/2016] [Indexed: 12/16/2022] Open
Abstract
C-reactive protein (CRP) concentrations rise in response to tissue injury or infection. Circulating pentameric CRP (pCRP) localizes to damaged tissue where it leads to complement activation and further tissue damage. In-depth knowledge of the pCRP activation mechanism is essential to develop therapeutic strategies to minimize tissue injury. Here we demonstrate that pCRP by binding to cell-derived microvesicles undergoes a structural change without disrupting the pentameric symmetry (pCRP*). pCRP* constitutes the major CRP species in human-inflamed tissue and allows binding of complement factor 1q (C1q) and activation of the classical complement pathway. pCRP*–microvesicle complexes lead to enhanced recruitment of leukocytes to inflamed tissue. A small-molecule inhibitor of pCRP (1,6-bis(phosphocholine)-hexane), which blocks the pCRP–microvesicle interactions, abrogates these proinflammatory effects. Reducing inflammation-mediated tissue injury by therapeutic inhibition might improve the outcome of myocardial infarction, stroke and other inflammatory conditions. C-reactive protein is a pentameric protein secreted by the liver in response to injury and infection. Here Braig et al. show that conformational changes in CRP on the surface of monocyte-derived microvesicles enable binding of complement C1q and lead to activation of the complement cascade and aggravation of inflammation.
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Pednekar L, Pandit H, Paudyal B, Kaur A, Al-Mozaini MA, Kouser L, Ghebrehiwet B, Mitchell DA, Madan T, Kishore U. Complement Protein C1q Interacts with DC-SIGN via Its Globular Domain and Thus May Interfere with HIV-1 Transmission. Front Immunol 2016; 7:600. [PMID: 28066413 PMCID: PMC5177617 DOI: 10.3389/fimmu.2016.00600] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Accepted: 11/30/2016] [Indexed: 12/11/2022] Open
Abstract
Dendritic cells (DCs) are the most potent antigen-presenting cells capable of priming naïve T-cells. Its C-type lectin receptor, DC-SIGN, regulates a wide range of immune functions. Along with its role in HIV-1 pathogenesis through complement opsonization of the virus, DC-SIGN has recently emerged as an adaptor for complement protein C1q on the surface of immature DCs via a trimeric complex involving gC1qR, a receptor for the globular domain of C1q. Here, we have examined the nature of interaction between C1q and DC-SIGN in terms of domain localization, and implications of C1q–DC-SIGN-gC1qR complex formation on HIV-1 transmission. We first expressed and purified recombinant extracellular domains of DC-SIGN and its homologue DC-SIGNR as tetramers comprising of the entire extra cellular domain including the α-helical neck region and monomers comprising of the carbohydrate recognition domain only. Direct binding studies revealed that both DC-SIGN and DC-SIGNR were able to bind independently to the recombinant globular head modules ghA, ghB, and ghC, with ghB being the preferential binder. C1q appeared to interact with DC-SIGN or DC-SIGNR in a manner similar to IgG. Mutational analysis using single amino acid substitutions within the globular head modules showed that TyrB175 and LysB136 were critical for the C1q–DC-SIGN/DC-SIGNR interaction. Competitive studies revealed that gC1qR and ghB shared overlapping binding sites on DC-SIGN, implying that HIV-1 transmission by DCs could be modulated due to the interplay of gC1qR-C1q with DC-SIGN. Since C1q, gC1qR, and DC-SIGN can individually bind HIV-1, we examined how C1q and gC1qR modulated HIV-1–DC-SIGN interaction in an infection assay. Here, we report, for the first time, that C1q suppressed DC-SIGN-mediated transfer of HIV-1 to activated pooled peripheral blood mononuclear cells, although the globular head modules did not. The protective effect of C1q was negated by the addition of gC1qR. In fact, gC1qR enhanced DC-SIGN-mediated HIV-1 transfer, suggesting its role in HIV-1 pathogenesis. Our results highlight the consequences of multiple innate immune pattern recognition molecules forming a complex that can modify their functions in a way, which may be advantageous for the pathogen.
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Affiliation(s)
- Lina Pednekar
- Biosciences, College of Health and Life Sciences, Brunel University London , Uxbridge , UK
| | - Hrishikesh Pandit
- Department of Innate Immunity, National Institute for Research in Reproductive Health (ICMR) , Mumbai , India
| | - Basudev Paudyal
- Biosciences, College of Health and Life Sciences, Brunel University London , Uxbridge , UK
| | - Anuvinder Kaur
- Biosciences, College of Health and Life Sciences, Brunel University London , Uxbridge , UK
| | - Maha Ahmed Al-Mozaini
- Department of Infection and Immunity, King Faisal Specialist Hospital and Research Centre , Riyadh , Saudi Arabia
| | - Lubna Kouser
- Biosciences, College of Health and Life Sciences, Brunel University London , Uxbridge , UK
| | - Berhane Ghebrehiwet
- Department of Medicine, State University of New York , Stony Brook, NY , USA
| | - Daniel A Mitchell
- Clinical Sciences Research Laboratories, University of Warwick , Coventry , UK
| | - Taruna Madan
- Department of Innate Immunity, National Institute for Research in Reproductive Health (ICMR) , Mumbai , India
| | - Uday Kishore
- Biosciences, College of Health and Life Sciences, Brunel University London , Uxbridge , UK
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Vezzoli M, Sciorati C, Campana L, Monno A, Doglio MG, Rigamonti E, Corna G, Touvier T, Castiglioni A, Capobianco A, Mantovani A, Manfredi AA, Garlanda C, Rovere-Querini P. The clearance of cell remnants and the regeneration of the injured muscle depend on soluble pattern recognition receptor PTX3. Mol Med 2016; 22:809-820. [PMID: 27900389 DOI: 10.2119/molmed.2016.00002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2016] [Accepted: 09/29/2016] [Indexed: 12/27/2022] Open
Abstract
OBJECTIVE The signals causing the resolution of muscle inflammation are only partially characterized. The long pentraxin PTX3, which modulates leukocyte recruitment and activation, could contribute. METHODS We analysed the expression of ptx3 after muscle injury and verified whether hematopoietic precursors are a source of the protein. The kinetics of regeneration and leukocytes infiltration, the accumulation of cell remnants and anti-histidyl-t-RNA synthetase autoantibodies were compared in wild-type and ptx3-deficient mice. RESULTS Ptx3 expression was up-regulated three-five days after injury and restricted to the extracellular matrix. Cellular debris and leukocytes persisted in the muscle of ptx3-deficient mice for a long time after wild-type animals had healed. ptx3-deficient macrophages expressed receptors involved in apoptotic cell clearance and engulfed dead cells in vitro. Accumulation of cell debris in a pro-inflammatory microenvironment was not sufficient to elicit autoantibodies. CONCLUSION PTX3 generated in response to muscle injury prompts the clearance of debris and the termination of the inflammatory response.
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Affiliation(s)
- Michela Vezzoli
- Division of Immunology, Transplantation and Infectious Disease, San Raffaele Scientific Institute, Milano, Italy
| | - Clara Sciorati
- Division of Immunology, Transplantation and Infectious Disease, San Raffaele Scientific Institute, Milano, Italy
| | - Lara Campana
- Division of Immunology, Transplantation and Infectious Disease, San Raffaele Scientific Institute, Milano, Italy
| | - Antonella Monno
- Division of Immunology, Transplantation and Infectious Disease, San Raffaele Scientific Institute, Milano, Italy
| | - Maria Giulia Doglio
- Division of Immunology, Transplantation and Infectious Disease, San Raffaele Scientific Institute, Milano, Italy
| | - Elena Rigamonti
- Division of Immunology, Transplantation and Infectious Disease, San Raffaele Scientific Institute, Milano, Italy
| | - Gianfranca Corna
- Division of Immunology, Transplantation and Infectious Disease, San Raffaele Scientific Institute, Milano, Italy
| | - Thierry Touvier
- Division of Immunology, Transplantation and Infectious Disease, San Raffaele Scientific Institute, Milano, Italy
| | - Alessandra Castiglioni
- Division of Immunology, Transplantation and Infectious Disease, San Raffaele Scientific Institute, Milano, Italy
| | - Annalisa Capobianco
- Division of Immunology, Transplantation and Infectious Disease, San Raffaele Scientific Institute, Milano, Italy
| | - Alberto Mantovani
- Humanitas Clinical and Research Center, Rozzano, Milano, Italy.,Humanitas University, Rozzano, Milan, Italy
| | - Angelo A Manfredi
- Division of Immunology, Transplantation and Infectious Disease, San Raffaele Scientific Institute, Milano, Italy.,Vita-Salute San Raffaele University, School of Medicine, Milano, Italy
| | | | - Patrizia Rovere-Querini
- Division of Immunology, Transplantation and Infectious Disease, San Raffaele Scientific Institute, Milano, Italy.,Vita-Salute San Raffaele University, School of Medicine, Milano, Italy
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Doni A, Garlanda C, Mantovani A. Innate immunity, hemostasis and matrix remodeling: PTX3 as a link. Semin Immunol 2016; 28:570-577. [PMID: 27881292 DOI: 10.1016/j.smim.2016.10.012] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Revised: 10/07/2016] [Accepted: 10/12/2016] [Indexed: 12/20/2022]
Abstract
Innate immunity is evolutionarily connected with hemostasis. PTX3 is an essential fluid-phase pattern recognition molecule of the innate immune system that acts as a functional ancestor of antibodies. PTX3 by interacting with defense collagens and fibrinogens amplifies effector functions of the innate immune system. At wound sites, PTX3 regulates the injury-induced thrombotic response and promotes wound healing by favoring timely fibrinolysis. Therefore, PTX3 interacts with ancestral domains conserved in innate immunity, hemostasis and extracellular matrix and exerts functions related to both antimicrobial resistance and tissue repair. These findings strengthen the connection between innate immune system and hemostasis, and suggest that recognition of microbes and extracellular matrix are evolutionarily conserved and integrated functions of the innate immune system.
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Affiliation(s)
- Andrea Doni
- Istituto Clinico Humanitas IRCCS, via Manzoni 113, 20089 Rozzano, Italy.
| | - Cecilia Garlanda
- Istituto Clinico Humanitas IRCCS, via Manzoni 113, 20089 Rozzano, Italy; Humanitas University, via Manzoni 113, 20089 Rozzano, Italy
| | - Alberto Mantovani
- Istituto Clinico Humanitas IRCCS, via Manzoni 113, 20089 Rozzano, Italy; Humanitas University, via Manzoni 113, 20089 Rozzano, Italy
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39
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Roy N, Ohtani K, Hidaka Y, Amano Y, Matsuda Y, Mori K, Hwang I, Inoue N, Wakamiya N. Three pentraxins C-reactive protein, serum amyloid p component and pentraxin 3 mediate complement activation using Collectin CL-P1. Biochim Biophys Acta Gen Subj 2016; 1861:1-14. [PMID: 27864148 DOI: 10.1016/j.bbagen.2016.11.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 11/02/2016] [Accepted: 11/14/2016] [Indexed: 01/06/2023]
Abstract
BACKGROUND Pentraxins (PTXs) are a superfamily of multifunctional conserved proteins involved in acute-phase responses. Recently, we have shown that collectin placenta 1 (CL-P1) and C-reactive protein (CRP) mediated complement activation and failed to form terminal complement complex (TCC) in normal serum conditions because of complement factor H inhibition. METHODS We used CL-P1 expressing CHO/ldlA7 cells to study the interaction with PTXs. Soluble type CL-P1 was used in an ELISA assay for the binding, C3 and TCC deposition experiments. Furthermore, we used our previously established CL-P1 expressing HEK293 cells for the C3 fragment and TCC deposition assay. RESULTS We demonstrated that CL-P1 also bound serum amyloid p component (SAP) and pentraxin 3 (PTX3) to activate the classical pathway and the alternative pathway using factor B. CRP and PTX3 further amplified complement deposition by properdin. We found that CRP and PTX3 recruit CFH, whereas SAP recruits C4 binding protein on CL-P1 expressing cell surfaces to prevent the formation of TCC in normal serum conditions. In addition, depletion of CFH, C4BP and complement factor I (CFI) failed to prevent TCC formation both in ELISA and cell experiments. Furthermore, soluble complement receptor 1, an inhibitor of all complement pathways prevents PTX induced TCC formation. CONCLUSION Our current study hypothesizes that the interaction of pentraxins with CL-P1 is involved in complement activation. GENERAL SIGNIFICANCE CL-P1 might generally inhibit PTX induced complement activation and host damage to protect self-tissues.
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Affiliation(s)
- Nitai Roy
- Department of Microbiology & Immunochemistry, Asahikawa Medical University, Asahikawa 078-8510, Japan
| | - Katsuki Ohtani
- Department of Microbiology & Immunochemistry, Asahikawa Medical University, Asahikawa 078-8510, Japan
| | - Yoshihiko Hidaka
- Department of Pediatrics, School of Medicine, Shinshu University, 3-1-1 Asahi, Matsumoto, Nagano 390-8621, Japan
| | - Yoshiro Amano
- Department of Pediatrics, Nagano Red Cross Hospital, 5-22-1 Wakasato, Nagano 380-8582, Japan
| | - Yasuyuki Matsuda
- Department of Microbiology & Immunochemistry, Asahikawa Medical University, Asahikawa 078-8510, Japan
| | - Kenichiro Mori
- Department of Microbiology & Immunochemistry, Asahikawa Medical University, Asahikawa 078-8510, Japan
| | - Insu Hwang
- Department of Microbiology & Immunochemistry, Asahikawa Medical University, Asahikawa 078-8510, Japan
| | - Norimitsu Inoue
- Department of Tumor Immunology, Research Institute, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka 537-8511, Japan
| | - Nobutaka Wakamiya
- Department of Microbiology & Immunochemistry, Asahikawa Medical University, Asahikawa 078-8510, Japan.
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The staphylococcal surface-glycopolymer wall teichoic acid (WTA) is crucial for complement activation and immunological defense against Staphylococcus aureus infection. Immunobiology 2016; 221:1091-101. [PMID: 27424796 DOI: 10.1016/j.imbio.2016.06.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Revised: 06/08/2016] [Accepted: 06/09/2016] [Indexed: 11/22/2022]
Abstract
Staphylococcus aureus is a Gram-positive bacterial pathogen that is decorated by glycopolymers, including wall teichoic acid (WTA), peptidoglycan, lipoteichoic acid, and capsular polysaccharides. These bacterial surface glycopolymers are recognized by serum antibodies and a variety of pattern recognition molecules, including mannose-binding lectin (MBL). Recently, we demonstrated that human serum MBL senses staphylococcal WTA. Whereas MBL in infants who have not yet fully developed adaptive immunity binds to S. aureus WTA and activates complement serum, MBL in adults who have fully developed adaptive immunity cannot bind to WTA because of an inhibitory effect of serum anti-WTA IgG. Furthermore, we showed that human anti-WTA IgGs purified from pooled adult serum IgGs triggered activation of classical complement-dependent opsonophagocytosis against S. aureus. Because the epitopes of WTA that are recognized by anti-WTA IgG and MBL have not been determined, we constructed several S. aureus mutants with altered WTA glycosylation. Our intensive biochemical studies provide evidence that the β-GlcNAc residues of WTA are required for the induction of anti-WTA IgG-mediated opsonophagocytosis and that both β- and α-GlcNAc residues are required for MBL-mediated complement activation. The molecular interactions of other S. aureus cell wall components and host recognition proteins are also discussed. In summary, in this review, we discuss the biological importance of S. aureus cell surface glycopolymers in complement activation and host defense responses.
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41
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Moreau C, Bally I, Chouquet A, Bottazzi B, Ghebrehiwet B, Gaboriaud C, Thielens N. Structural and Functional Characterization of a Single-Chain Form of the Recognition Domain of Complement Protein C1q. Front Immunol 2016; 7:79. [PMID: 26973654 PMCID: PMC4774423 DOI: 10.3389/fimmu.2016.00079] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Accepted: 02/18/2016] [Indexed: 11/17/2022] Open
Abstract
Complement C1q is a soluble pattern recognition molecule comprising six heterotrimeric subunits assembled from three polypeptide chains (A–C). Each heterotrimer forms a collagen-like stem prolonged by a globular recognition domain. These recognition domains sense a wide variety of ligands, including pathogens and altered-self components. Ligand recognition is either direct or mediated by immunoglobulins or pentraxins. Multivalent binding of C1q to its targets triggers immune effector mechanisms mediated via its collagen-like stems. The induced immune response includes activation of the classical complement pathway and enhancement of the phagocytosis of the recognized target. We report here, the first production of a single-chain recombinant form of human C1q globular region (C1q-scGR). The three monomers have been linked in tandem to generate a single continuous polypeptide, based on a strategy previously used for adiponectin, a protein structurally related to C1q. The resulting C1q-scGR protein was produced at high yield in stably transfected 293-F mammalian cells. Recombinant C1q-scGR was correctly folded, as demonstrated by its X-ray crystal structure solved at a resolution of 1.35 Å. Its interaction properties were assessed by surface plasmon resonance analysis using the following physiological C1q ligands: the receptor for C1q globular heads, the long pentraxin PTX3, calreticulin, and heparin. The 3D structure and the binding properties of C1q-scGR were similar to those of the three-chain fragment generated by collagenase digestion of serum-derived C1q. Comparison of the interaction properties of the fragments with those of native C1q provided insights into the avidity component associated with the hexameric assembly of C1q. The interest of this functional recombinant form of the recognition domains of C1q in basic research and its potential biomedical applications are discussed.
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Affiliation(s)
- Christophe Moreau
- IBS, University of Grenoble Alpes, Grenoble, France; CNRS, IBS, Grenoble, France; IBS, CEA, Grenoble, France
| | - Isabelle Bally
- IBS, University of Grenoble Alpes, Grenoble, France; CNRS, IBS, Grenoble, France; IBS, CEA, Grenoble, France
| | - Anne Chouquet
- IBS, University of Grenoble Alpes, Grenoble, France; CNRS, IBS, Grenoble, France; IBS, CEA, Grenoble, France
| | - Barbara Bottazzi
- Immunopharmacology Laboratory, Humanitas Research Hospital , Rozzano , Italy
| | | | - Christine Gaboriaud
- IBS, University of Grenoble Alpes, Grenoble, France; CNRS, IBS, Grenoble, France; IBS, CEA, Grenoble, France
| | - Nicole Thielens
- IBS, University of Grenoble Alpes, Grenoble, France; CNRS, IBS, Grenoble, France; IBS, CEA, Grenoble, France
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Pednekar L, Pathan AA, Paudyal B, Tsolaki AG, Kaur A, Abozaid SM, Kouser L, Khan HA, Peerschke EI, Shamji MH, Stenbeck G, Ghebrehiwet B, Kishore U. Analysis of the Interaction between Globular Head Modules of Human C1q and Its Candidate Receptor gC1qR. Front Immunol 2016; 7:567. [PMID: 28018340 PMCID: PMC5153404 DOI: 10.3389/fimmu.2016.00567] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 11/22/2016] [Indexed: 02/05/2023] Open
Abstract
The heterotrimeric globular head (gC1q) domain of human C1q is made up of the C-terminal ends of the three individual chains, ghA, ghB, and ghC. A candidate receptor for the gC1q domain is a multi-functional pattern recognition protein, gC1qR. Since understanding of gC1qR and gC1q interaction could provide an insight into the pleiotropic functions of gC1qR, this study was undertaken to identify the gC1qR-binding site on the gC1q domain, using the recombinant ghA, ghB, and ghC modules and their substitution mutants. Our results show that ghA, ghB, and ghC modules can interact with gC1qR independently, thus reinforcing the notion of modularity within the gC1q domain of human C1q. Mutational analysis revealed that while Arg162 in the ghA module is central to interaction between gC1qR and C1q, a single amino acid substitution (arginine to glutamate) in residue 114 of the ghB module resulted in enhanced binding. Expression of gC1qR and C1q in adherent monocytes with or without pro-inflammatory stimuli was also analyzed by qPCR; it showed an autocrine/paracrine basis of C1q and gC1qR interaction. Microscopic studies revealed that C1q and gC1qR are colocalized on PBMCs. Cell proliferation assays indicated that ghA, ghB, and ghC modules were able to attenuate phytohemagglutinin-stimulated proliferation of PBMCs. Addition of gC1qR had an additive effect on the anti-proliferative effect of globular head modules. In summary, our results identify residues involved in C1q-gC1qR interaction and explain, to a certain level, their involvement on the immune cell surface, which is relevant for C1q-induced functions including inflammation, infection, and immunity.
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Affiliation(s)
- Lina Pednekar
- Biosciences, College of Health and Life Sciences, Brunel University London, London, UK
| | - Ansar A. Pathan
- Biosciences, College of Health and Life Sciences, Brunel University London, London, UK
| | - Basudev Paudyal
- Biosciences, College of Health and Life Sciences, Brunel University London, London, UK
| | - Anthony G. Tsolaki
- Biosciences, College of Health and Life Sciences, Brunel University London, London, UK
| | - Anuvinder Kaur
- Biosciences, College of Health and Life Sciences, Brunel University London, London, UK
| | - Suhair M. Abozaid
- Biosciences, College of Health and Life Sciences, Brunel University London, London, UK
| | - Lubna Kouser
- Biosciences, College of Health and Life Sciences, Brunel University London, London, UK
| | - Haseeb A. Khan
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Ellinor I. Peerschke
- Department of Laboratory Medicine, Memorial Sloan-Kettering, Cancer Center, New York, NY, USA
| | - Mohamed H. Shamji
- Allergy and Clinical Immunology, National Heart and Lung Institute, Imperial College London, London, UK
| | - Gudrun Stenbeck
- Biosciences, College of Health and Life Sciences, Brunel University London, London, UK
| | - Berhane Ghebrehiwet
- Department of Medicine, State University of New York, Stony Brook, NY, USA
- *Correspondence: Berhane Ghebrehiwet, ; Uday Kishore, ,
| | - Uday Kishore
- Biosciences, College of Health and Life Sciences, Brunel University London, London, UK
- *Correspondence: Berhane Ghebrehiwet, ; Uday Kishore, ,
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Foo SS, Reading PC, Jaillon S, Mantovani A, Mahalingam S. Pentraxins and Collectins: Friend or Foe during Pathogen Invasion? Trends Microbiol 2015; 23:799-811. [PMID: 26482345 PMCID: PMC7127210 DOI: 10.1016/j.tim.2015.09.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Revised: 09/07/2015] [Accepted: 09/22/2015] [Indexed: 12/24/2022]
Abstract
Innate immunity serves as the frontline defence against invading pathogens. Despite decades of research, new insights are constantly challenging our understanding of host-elicited immunity during microbial infections. Recently, two families of humoral innate immune proteins, pentraxins and collectins, have become a major focus of research in the field of innate immunity. Pentraxins and collectins are key players in activating the humoral arm of innate immunity, taking centre stage in immunoregulation and disease modulation. However, increasing evidence suggests that pentraxins and collectins can also mediate pathogenic effects during some infections. Herein, we discuss the protective and pathogenic effects of pentraxins and collectins, as well as their therapeutic significance.
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Affiliation(s)
- Suan-Sin Foo
- Institute for Glycomics, Griffith University, Gold Coast, QLD 4222, Australia
| | - Patrick C Reading
- WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria 3000, Australia
| | - Sébastien Jaillon
- Humanitas Clinical and Research Center, Department of Inflammation and Immunology, 20089, Rozzano, Milano, Italy
| | - Alberto Mantovani
- Humanitas Clinical and Research Center, Department of Inflammation and Immunology, 20089, Rozzano, Milano, Italy; Humanitas University, 20089, Rozzano, Milano, Italy
| | - Suresh Mahalingam
- Institute for Glycomics, Griffith University, Gold Coast, QLD 4222, Australia.
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Pondman KM, Pednekar L, Paudyal B, Tsolaki AG, Kouser L, Khan HA, Shamji MH, Ten Haken B, Stenbeck G, Sim RB, Kishore U. Innate immune humoral factors, C1q and factor H, with differential pattern recognition properties, alter macrophage response to carbon nanotubes. NANOMEDICINE : NANOTECHNOLOGY, BIOLOGY, AND MEDICINE 2015; 11:2109-18. [PMID: 26169151 DOI: 10.1016/j.nano.2015.06.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 06/09/2015] [Accepted: 06/21/2015] [Indexed: 02/05/2023]
Abstract
UNLABELLED Interaction between the complement system and carbon nanotubes (CNTs) can modify their intended biomedical applications. Pristine and derivatised CNTs can activate complement primarily via the classical pathway which enhances uptake of CNTs and suppresses pro-inflammatory response by immune cells. Here, we report that the interaction of C1q, the classical pathway recognition molecule, with CNTs involves charge pattern and classical pathway activation that is partly inhibited by factor H, a complement regulator. C1q and its globular modules, but not factor H, enhanced uptake of CNTs by macrophages and modulated the pro-inflammatory immune response. Thus, soluble complement factors can interact differentially with CNTs and alter the immune response even without complement activation. Coating CNTs with recombinant C1q globular heads offers a novel way of controlling classical pathway activation in nanotherapeutics. Surprisingly, the globular heads also enhance clearance by phagocytes and down-regulate inflammation, suggesting unexpected complexity in receptor interaction. FROM THE CLINICAL EDITOR Carbon nanotubes (CNTs) maybe useful in the clinical setting as targeting drug carriers. However, it is also well known that they can interact and activate the complement system, which may have a negative impact on the applicability of CNTs. In this study, the authors functionalized multi-walled CNT (MWNT), and investigated the interaction with the complement pathway. These studies are important so as to gain further understanding of the underlying mechanism in preparation for future use of CNTs in the clinical setting.
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Affiliation(s)
- Kirsten M Pondman
- Centre for Infection, Immunity and Disease Mechanisms, Department of Life Sciences, College of Health and Life Sciences, Brunel University London, UK; Neuro Imaging, MIRA Institute, University of Twente, Enschede, the Netherlands
| | - Lina Pednekar
- Centre for Infection, Immunity and Disease Mechanisms, Department of Life Sciences, College of Health and Life Sciences, Brunel University London, UK
| | - Basudev Paudyal
- Centre for Infection, Immunity and Disease Mechanisms, Department of Life Sciences, College of Health and Life Sciences, Brunel University London, UK
| | - Anthony G Tsolaki
- Centre for Infection, Immunity and Disease Mechanisms, Department of Life Sciences, College of Health and Life Sciences, Brunel University London, UK
| | - Lubna Kouser
- Centre for Infection, Immunity and Disease Mechanisms, Department of Life Sciences, College of Health and Life Sciences, Brunel University London, UK
| | - Haseeb A Khan
- Department of Biochemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Mohamed H Shamji
- Allergy and Clinical Immunology, National Heart and lung Institute, Imperial College London, London, UK; MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, London, UK
| | - Bennie Ten Haken
- Neuro Imaging, MIRA Institute, University of Twente, Enschede, the Netherlands
| | - Gudrun Stenbeck
- Centre for Infection, Immunity and Disease Mechanisms, Department of Life Sciences, College of Health and Life Sciences, Brunel University London, UK
| | - Robert B Sim
- Department of Pharmacology, University of Oxford, Oxford, UK; Department of Infection, Immunity and Inflammation, University of Leicester, Leicester, UK
| | - Uday Kishore
- Centre for Infection, Immunity and Disease Mechanisms, Department of Life Sciences, College of Health and Life Sciences, Brunel University London, UK.
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45
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Estepa A, Coll J. Innate Multigene Family Memories Are Implicated in the Viral-Survivor Zebrafish Phenotype. PLoS One 2015; 10:e0135483. [PMID: 26270536 PMCID: PMC4535885 DOI: 10.1371/journal.pone.0135483] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Accepted: 07/22/2015] [Indexed: 11/18/2022] Open
Abstract
Since adaptive features such as memory were discovered in mammalian innate immunity, interest in the immunological status of primitive vertebrates after infections has grown. In this context, we used zebrafish (Danio rerio), a primitive vertebrate species suited to molecular and genetic studies to explore transcriptional memories of the immune system in long-term survivors of viral haemorrhagic septicemia virus infections. Immune-gene targeted microarrays designed in-house, multipath genes, gene set enrichment, and leading-edge analysis, reveal unexpected consistent correlations between the viral-survivor phenotype and several innate multigene families. Thus, here we describe in survivors of infections the upregulation of the multigene family of proteasome subunit macropains, zebrafish-specific novel gene sets, mitogen activated protein kinases, and epidermal growth factor. We also describe the downregulation of the multigene families of c-reactive proteins, myxovirus-induced proteins and novel immunoglobulin-type receptors. The strength of those immunological memories was reflected by the exceptional similarity of the transcriptional profiles of survivors before and after re-infection compared with primary infected fish. On the other hand, the high levels of neutralizing antibodies in the blood plasma of survivors contrasted with the depletion of transcripts specific for most cell types present in lymphoid organs. Therefore, long-term survivors maintained unexpected molecular/cellular memories of previous viral encounters by modulating the expression levels of innate multigene families as well as having specific adaptive antibodies. The implications of the so-called "trained immunity" for future research in this field are also discussed.
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Affiliation(s)
- Amparo Estepa
- Instituto de Biología Molecular y Celular, Universidad Miguel Hernández, Elche (UMH), Alicante, Spain
| | - Julio Coll
- Department of Biotechnology, Instituto Nacional Investigaciones Agrarias (INIA), Madrid, Spain
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46
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Merle NS, Church SE, Fremeaux-Bacchi V, Roumenina LT. Complement System Part I - Molecular Mechanisms of Activation and Regulation. Front Immunol 2015; 6:262. [PMID: 26082779 PMCID: PMC4451739 DOI: 10.3389/fimmu.2015.00262] [Citation(s) in RCA: 979] [Impact Index Per Article: 108.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 05/11/2015] [Indexed: 12/12/2022] Open
Abstract
Complement is a complex innate immune surveillance system, playing a key role in defense against pathogens and in host homeostasis. The complement system is initiated by conformational changes in recognition molecular complexes upon sensing danger signals. The subsequent cascade of enzymatic reactions is tightly regulated to assure that complement is activated only at specific locations requiring defense against pathogens, thus avoiding host tissue damage. Here, we discuss the recent advances describing the molecular and structural basis of activation and regulation of the complement pathways and their implication on physiology and pathology. This article will review the mechanisms of activation of alternative, classical, and lectin pathways, the formation of C3 and C5 convertases, the action of anaphylatoxins, and the membrane-attack-complex. We will also discuss the importance of structure-function relationships using the example of atypical hemolytic uremic syndrome. Lastly, we will discuss the development and benefits of therapies using complement inhibitors.
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Affiliation(s)
- Nicolas S Merle
- UMR_S 1138, Cordeliers Research Center, Complement and Diseases Team, INSERM , Paris , France ; UMR_S 1138, Centre de Recherche des Cordeliers, Sorbonne Paris Cité, Université Paris Descartes , Paris , France ; UMR_S 1138, Centre de Recherche des Cordeliers, Sorbonne Universités, Université Pierre et Marie Curie-Paris , Paris , France
| | - Sarah Elizabeth Church
- UMR_S 1138, Centre de Recherche des Cordeliers, Sorbonne Paris Cité, Université Paris Descartes , Paris , France ; UMR_S 1138, Centre de Recherche des Cordeliers, Sorbonne Universités, Université Pierre et Marie Curie-Paris , Paris , France ; UMR_S 1138, Cordeliers Research Center, Integrative Cancer Immunology Team, INSERM , Paris , France
| | - Veronique Fremeaux-Bacchi
- UMR_S 1138, Cordeliers Research Center, Complement and Diseases Team, INSERM , Paris , France ; UMR_S 1138, Centre de Recherche des Cordeliers, Sorbonne Paris Cité, Université Paris Descartes , Paris , France ; UMR_S 1138, Centre de Recherche des Cordeliers, Sorbonne Universités, Université Pierre et Marie Curie-Paris , Paris , France ; Service d'Immunologie Biologique, Assistance Publique-Hôpitaux de Paris, Hôpital Européen Georges-Pompidou , Paris , France
| | - Lubka T Roumenina
- UMR_S 1138, Cordeliers Research Center, Complement and Diseases Team, INSERM , Paris , France ; UMR_S 1138, Centre de Recherche des Cordeliers, Sorbonne Paris Cité, Université Paris Descartes , Paris , France ; UMR_S 1138, Centre de Recherche des Cordeliers, Sorbonne Universités, Université Pierre et Marie Curie-Paris , Paris , France
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47
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Complement protein C1q modulates neurite outgrowth in vitro and spinal cord axon regeneration in vivo. J Neurosci 2015; 35:4332-49. [PMID: 25762679 DOI: 10.1523/jneurosci.4473-12.2015] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Traumatic injury to CNS fiber tracts is accompanied by failure of severed axons to regenerate and results in lifelong functional deficits. The inflammatory response to CNS trauma is mediated by a diverse set of cells and proteins with varied, overlapping, and opposing effects on histological and behavioral recovery. Importantly, the contribution of individual inflammatory complement proteins to spinal cord injury (SCI) pathology is not well understood. Although the presence of complement components increases after SCI in association with axons and myelin, it is unknown whether complement proteins affect axon growth or regeneration. We report a novel role for complement C1q in neurite outgrowth in vitro and axon regrowth after SCI. In culture, C1q increased neurite length on myelin. Protein and molecular assays revealed that C1q interacts directly with myelin associated glycoprotein (MAG) in myelin, resulting in reduced activation of growth inhibitory signaling in neurons. In agreement with a C1q-outgrowth-enhancing mechanism in which C1q binding to MAG reduces MAG signaling to neurons, complement C1q blocked both the growth inhibitory and repulsive turning effects of MAG in vitro. Furthermore, C1q KO mice demonstrated increased sensory axon turning within the spinal cord lesion after SCI with peripheral conditioning injury, consistent with C1q-mediated neutralization of MAG. Finally, we present data that extend the role for C1q in axon growth and guidance to include the sprouting patterns of descending corticospinal tract axons into spinal gray matter after dorsal column transection SCI.
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48
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FAN C, WANG J, ZHANG X, SONG J. Functional C1q is present in the skin mucus of Siberian sturgeon (Acipenser baerii). Integr Zool 2015; 10:102-10. [DOI: 10.1111/1749-4877.12100] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chunxin FAN
- Institute for Marine Biosystem and Neuroscience; International Center for Marine Studies, Shanghai Ocean University; Shanghai China
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources; Shanghai Ocean University, Ministry of Education; Shanghai China
| | - Jian WANG
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources; Shanghai Ocean University, Ministry of Education; Shanghai China
- Institute of Brain Science; Fudan University; Shanghai China
| | - Xuguang ZHANG
- Institute for Marine Biosystem and Neuroscience; International Center for Marine Studies, Shanghai Ocean University; Shanghai China
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources; Shanghai Ocean University, Ministry of Education; Shanghai China
| | - Jiakun SONG
- Institute for Marine Biosystem and Neuroscience; International Center for Marine Studies, Shanghai Ocean University; Shanghai China
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources; Shanghai Ocean University, Ministry of Education; Shanghai China
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Abstract
During infection significant alterations in lipid metabolism and lipoprotein composition occur. Triglyceride and VLDL cholesterol levels increase, while reduced HDL cholesterol (HDL-C) and LDL cholesterol (LDL-C) levels are observed. More importantly, endotoxemia modulates HDL composition and size: phospholipids are reduced as well as apolipoprotein (apo) A-I, while serum amyloid A (SAA) and secretory phospholipase A2 (sPLA2) dramatically increase, and, although the total HDL particle number does not change, a significant decrease in the number of small- and medium-size particles is observed. Low HDL-C levels inversely correlate with the severity of septic disease and associate with an exaggerated systemic inflammatory response. HDL, as well as other plasma lipoproteins, can bind and neutralize Gram-negative bacterial lipopolysaccharide (LPS) and Gram-positive bacterial lipoteichoic acid (LTA), thus favoring the clearance of these products. HDLs are emerging also as a relevant player during parasitic infections, and a specific component of HDL, namely, apoL-1, confers innate immunity against trypanosome by favoring lysosomal swelling which kills the parasite. During virus infections, proteins associated with the modulation of cholesterol bioavailability in the lipid rafts such as ABCA1 and SR-BI have been shown to favor virus entry into the cells. Pharmacological studies support the benefit of recombinant HDL or apoA-I mimetics during bacterial infection, while apoL-1-nanobody complexes were tested for trypanosome infection. Finally, SR-BI antagonism represents a novel and forefront approach interfering with hepatitis C virus entry which is currently tested in clinical studies. From the coming years, we have to expect new and compelling observations further linking HDL to innate immunity and infections.
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50
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Jaillon S, Bonavita E, Gentile S, Rubino M, Laface I, Garlanda C, Mantovani A. The long pentraxin PTX3 as a key component of humoral innate immunity and a candidate diagnostic for inflammatory diseases. Int Arch Allergy Immunol 2014; 165:165-78. [PMID: 25531094 DOI: 10.1159/000368778] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The innate immune system is composed of a cellular arm and a humoral arm. Components of the humoral arm include members of the complement cascade and soluble pattern recognition molecules (PRMs). These PRMs recognize pathogen-associated molecular patterns and are functional ancestors of antibodies, playing a role in complement activation, opsonization and agglutination. Pentraxins consist of a set of multimeric soluble proteins and represent the prototypic components of humoral innate immunity. The prototypic long pentraxin PTX3 is highly conserved in evolution and produced by somatic and innate immune cells after proinflammatory stimuli. PTX3 interacts with a set of self, nonself and modified self ligands and exerts essential roles in innate immunity, inflammation control and matrix deposition. In addition, translational studies suggest that PTX3 may be a useful biomarker of human pathologies complementary to C-reactive protein. In this study, we will review the general functions of pentraxins in innate immunity and inflammation, focusing our attention on the prototypic long pentraxin PTX3.
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