1
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Lu Z, McBrearty N, Chen J, Tomar VS, Zhang H, De Rosa G, Tan A, Weljie AM, Beiting DP, Miao Z, George SS, Berger A, Saggu G, Diehl JA, Koumenis C, Fuchs SY. ATF3 and CH25H regulate effector trogocytosis and anti-tumor activities of endogenous and immunotherapeutic cytotoxic T lymphocytes. Cell Metab 2024; 36:1164-1167. [PMID: 38604169 DOI: 10.1016/j.cmet.2024.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
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2
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Zhang H, Tomar VS, Li J, Basavaraja R, Yan F, Gui J, McBrearty N, Costich TL, Beiting DP, Blanco MA, Conejo-Garcia JR, Saggu G, Berger A, Nefedova Y, Gabrilovich DI, Fuchs SY. Protection of Regulatory T Cells from Fragility and Inactivation in the Tumor Microenvironment. Cancer Immunol Res 2022; 10:1490-1505. [PMID: 36255418 PMCID: PMC9722544 DOI: 10.1158/2326-6066.cir-22-0295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 08/01/2022] [Accepted: 10/12/2022] [Indexed: 01/10/2023]
Abstract
Fragility of regulatory T (Treg) cells manifested by the loss of neuropilin-1 (NRP1) and expression of IFNγ undermines the immune suppressive functions of Treg cells and contributes to the success of immune therapies against cancers. Intratumoral Treg cells somehow avoid fragility; however, the mechanisms by which Treg cells are protected from fragility in the tumor microenvironment are not well understood. Here, we demonstrate that the IFNAR1 chain of the type I IFN (IFN1) receptor was downregulated on intratumoral Treg cells. Downregulation of IFNAR1 mediated by p38α kinase protected Treg cells from fragility and maintained NRP1 levels, which were decreased in response to IFN1. Genetic or pharmacologic inactivation of p38α and stabilization of IFNAR1 in Treg cells induced fragility and inhibited their immune suppressive and protumorigenic activities. The inhibitor of sumoylation TAK981 (Subasumstat) upregulated IFNAR1, eliciting Treg fragility and inhibiting tumor growth in an IFNAR1-dependent manner. These findings describe a mechanism by which intratumoral Treg cells retain immunosuppressive activities and suggest therapeutic approaches for inducing Treg fragility and increasing the efficacy of immunotherapies.
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Affiliation(s)
- Hongru Zhang
- Department of Biomedical Sciences, School of Veterinary
Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Vivek S. Tomar
- Department of Biomedical Sciences, School of Veterinary
Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Jinyang Li
- Department of Pathology and Laboratory Medicine, Perelman
School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Raghavendra Basavaraja
- Department of Biomedical Sciences, School of Veterinary
Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Fangxue Yan
- Department of Biomedical Sciences, School of Veterinary
Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Jun Gui
- Department of Biomedical Sciences, School of Veterinary
Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Noreen McBrearty
- Department of Biomedical Sciences, School of Veterinary
Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Tara Lee Costich
- Department of Immunology, H. Lee Moffitt Cancer Center and
Research Institute, Tampa, FL, USA
| | - Daniel P. Beiting
- Department of Pathobiology, School of Veterinary Medicine,
University of Pennsylvania, Philadelphia, PA 19104, USA
| | - M. Andres Blanco
- Department of Biomedical Sciences, School of Veterinary
Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Jose R. Conejo-Garcia
- Department of Immunology, H. Lee Moffitt Cancer Center and
Research Institute, Tampa, FL, USA
| | - Gurpanna Saggu
- Takeda Development Center Americas, Inc., Lexington, MA,
02421, USA
| | - Allison Berger
- Takeda Development Center Americas, Inc., Lexington, MA,
02421, USA
| | | | | | - Serge Y. Fuchs
- Department of Biomedical Sciences, School of Veterinary
Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.,Correspondence to: Serge Y.
Fuchs, Dept. of Biomedical Sciences, School of Veterinary Medicine, University
of Pennsylvania, 380 S. University Ave, Hill 316, Philadelphia, PA 19104; USA.
Tel: 1-215-573-6949;
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3
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Saggu G, Stroopinsky D, Dudek A, Olszanski A, Juric D, Dowlati A, Vaishampayan U, Assad H, Rodón J, Gibbs J, Green J, Du Z, Rudicell R, Kannan K, Gharavi R, Gomez-Pinillos A, Fram R, Berger A, Sachsenmeier K, Kasar S. Subasumstat, a first-in-class inhibitor of SUMO-activating enzyme, demonstrates dose-dependent target engagement and SUMOylation inhibition, leading to rapid activation of innate and adaptive immune responses in the dose escalation portion of a phase 1/2 clinical study. Eur J Cancer 2022. [DOI: 10.1016/s0959-8049(22)01134-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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4
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Lu Z, McBrearty N, Chen J, Tomar VS, Zhang H, De Rosa G, Tan A, Weljie AM, Beiting DP, Miao Z, George SS, Berger A, Saggu G, Diehl JA, Koumenis C, Fuchs SY. ATF3 and CH25H regulate effector trogocytosis and anti-tumor activities of endogenous and immunotherapeutic cytotoxic T lymphocytes. Cell Metab 2022; 34:1342-1358.e7. [PMID: 36070682 PMCID: PMC10496461 DOI: 10.1016/j.cmet.2022.08.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 05/31/2022] [Accepted: 08/11/2022] [Indexed: 02/03/2023]
Abstract
Effector trogocytosis between malignant cells and tumor-specific cytotoxic T lymphocytes (CTLs) contributes to immune evasion through antigen loss on target cells and fratricide of antigen-experienced CTLs by other CTLs. The mechanisms regulating these events in tumors remain poorly understood. Here, we demonstrate that tumor-derived factors (TDFs) stimulated effector trogocytosis and restricted CTLs' tumoricidal activity and viability in vitro. TDFs robustly altered the CTL's lipid profile, including depletion of 25-hydroxycholesterol (25HC). 25HC inhibited trogocytosis and prevented CTL's inactivation and fratricide. Mechanistically, TDFs induced ATF3 transcription factor that suppressed the expression of 25HC-regulating gene-cholesterol 25-hydroxylase (CH25H). Stimulation of trogocytosis in the intratumoral CTL by the ATF3-CH25H axis attenuated anti-tumor immunity, stimulated tumor growth, and impeded the efficacy of chimeric antigen receptor (CAR) T cell adoptive therapy. Through use of armored CAR constructs or pharmacologic agents restoring CH25H expression, we reversed these phenotypes and increased the efficacy of immunotherapies.
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Affiliation(s)
- Zhen Lu
- Department of Biomedical Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Noreen McBrearty
- Department of Biomedical Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Jinyun Chen
- Department of Biomedical Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Vivek S Tomar
- Department of Biomedical Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Hongru Zhang
- Department of Biomedical Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Gianluca De Rosa
- Department of Biomedical Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Aiwen Tan
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Aalim M Weljie
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Daniel P Beiting
- Department of Pathobiology, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Zhen Miao
- Department of Genomics and Computational Biology, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Subin S George
- Institute for Biomedical Informatics, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Allison Berger
- Takeda Development Center Americas, Inc., Lexington, MA 02421, USA
| | - Gurpanna Saggu
- Takeda Development Center Americas, Inc., Lexington, MA 02421, USA
| | - J Alan Diehl
- Department of Biochemistry, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Constantinos Koumenis
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Serge Y Fuchs
- Department of Biomedical Sciences, University of Pennsylvania, Philadelphia, PA 19104, USA.
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5
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Okubo K, Brenner MD, Cullere X, Saggu G, Patchen ML, Bose N, Mihori S, Yuan Z, Lowell CA, Zhu C, Mayadas TN. Inhibitory affinity modulation of FcγRIIA ligand binding by glycosphingolipids by inside-out signaling. Cell Rep 2021; 35:109142. [PMID: 34010642 PMCID: PMC8218468 DOI: 10.1016/j.celrep.2021.109142] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 01/19/2021] [Accepted: 04/26/2021] [Indexed: 12/22/2022] Open
Abstract
The interaction of the human FcγRIIA with immune complexes (ICs) promotes neutrophil activation and thus must be tightly controlled to avoid damage to healthy tissue. Here, we demonstrate that a fungal-derived soluble β-1,3/1,6-glucan binds to the glycosphingolipid long-chain lactosylceramide (LacCer) to reduce FcγRIIA-mediated recruitment to immobilized ICs under flow, a process requiring high-affinity FcγRIIA-immunoglobulin G (IgG) interactions. The inhibition requires Lyn phosphorylation of SHP-1 phosphatase and the FcγRIIA immunotyrosine-activating motif. β-glucan reduces the effective 2D affinity of FcγRIIA for IgG via Lyn and SHP-1 and, in vivo, inhibits FcγRIIA-mediated neutrophil recruitment to intravascular IgG deposited in the kidney glomeruli in a glycosphingolipid- and Lyn-dependent manner. In contrast, β-glucan did not affect FcγR functions that bypass FcγR affinity for IgG. In summary, we have identified a pathway for modulating the 2D affinity of FcγRIIA for ligand that relies on LacCer-Lyn-SHP-1-mediated inhibitory signaling triggered by β-glucan, a previously described activator of innate immunity. Okubo et al. demonstrate that β-glucan binding to the glycosphingolipid lactosylceramide engages a Lyn kinase to SHP-1 phosphatase pathway that reduces FcγRIIA binding propensity for IgG, which suggests FcγRIIA affinity regulation by “inside-out” signaling. The β-glucan-lactosylceramide-Lyn axis prevents FcγRIIA-dependent neutrophil recruitment in vitro and to intravascular IgG deposits following glomerulonephritis.
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Affiliation(s)
- Koshu Okubo
- Department of Pathology, Brigham and Women's Hospital & Harvard Medical School, Boston, MA 02115, USA
| | - Michael D Brenner
- Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Xavier Cullere
- Department of Pathology, Brigham and Women's Hospital & Harvard Medical School, Boston, MA 02115, USA
| | - Gurpanna Saggu
- Department of Pathology, Brigham and Women's Hospital & Harvard Medical School, Boston, MA 02115, USA
| | | | - Nandita Bose
- Biothera Pharmaceuticals, Inc., Eagan, Minnesota, MN 55121, USA
| | - Saki Mihori
- Department of Pathology, Brigham and Women's Hospital & Harvard Medical School, Boston, MA 02115, USA
| | - Zhou Yuan
- Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Clifford A Lowell
- Department of Laboratory Medicine, University of California, San Francisco, CA 94143, USA
| | - Cheng Zhu
- Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Tanya N Mayadas
- Department of Pathology, Brigham and Women's Hospital & Harvard Medical School, Boston, MA 02115, USA.
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6
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Martinez APG, Abreu PAE, de Arruda Vasconcellos S, Ho PL, Ferreira VP, Saggu G, Barbosa AS, Isaac L. The Role of Properdin in Killing of Non-Pathogenic Leptospira biflexa. Front Immunol 2020; 11:572562. [PMID: 33240263 PMCID: PMC7683387 DOI: 10.3389/fimmu.2020.572562] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Accepted: 10/05/2020] [Indexed: 11/25/2022] Open
Abstract
Properdin (P) is a positive regulatory protein that stabilizes the C3 convertase and C5 convertase of the complement alternative pathway (AP). Several studies have suggested that properdin can bind directly to the surface of certain pathogens regardless of the presence of C3bBb. Saprophytic Leptospira are susceptible to complement-mediated killing, but the interaction of properdin with Leptospira spp. has not been evaluated so far. In this work, we demonstrate that properdin present in normal human serum, purified properdin, as well as properdin oligomers P2, P3, and P4, interact with Leptospira. Properdin can bind directly to the bacterial surface even in the absence of C3b. In line with our previous findings, AP activation was shown to be important for killing non-pathogenic L. biflexa, and properdin plays a key role in this process since this microorganism survives in P-depleted human serum and the addition of purified properdin to P-depleted human serum decreases the number of viable leptospires. A panel of pathogenic L.interrogans recombinant proteins was used to identify putative properdin targets. Lsa30, an outer membrane protein from L. interrogans, binds to unfractionated properdin and to a lesser extent to P2-P4 properdin oligomers. In conclusion, properdin plays an important role in limiting bacterial proliferation of non-pathogenic Leptospira species. Once bound to the leptospiral surface, this positive complement regulatory protein of the AP contributes to the formation of the C3 convertase on the leptospire surface even in the absence of prior addition of C3b.
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Affiliation(s)
| | | | - Silvio de Arruda Vasconcellos
- Laboratory of Bacterial Zoonoses, Faculty of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Paulo Lee Ho
- Laboratory of Bacteriology, Butantan Institute, São Paulo, Brazil
| | - Viviana P Ferreira
- Department of Medical Microbiology and Immunology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH, United States
| | - Gurpanna Saggu
- Department of Medical Microbiology and Immunology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH, United States
| | | | - Lourdes Isaac
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
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7
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Blatt AZ, Saggu G, Cortes C, Herbert AP, Kavanagh D, Ricklin D, Lambris JD, Ferreira VP. Factor H C-Terminal Domains Are Critical for Regulation of Platelet/Granulocyte Aggregate Formation. Front Immunol 2017; 8:1586. [PMID: 29218045 PMCID: PMC5703703 DOI: 10.3389/fimmu.2017.01586] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 11/03/2017] [Indexed: 11/16/2022] Open
Abstract
Platelet/granulocyte aggregates (PGAs) increase thromboinflammation in the vasculature, and PGA formation is tightly controlled by the complement alternative pathway (AP) negative regulator, Factor H (FH). Mutations in FH are associated with the prothrombotic disease atypical hemolytic uremic syndrome (aHUS), yet it is unknown whether increased PGA formation contributes to the thrombosis seen in patients with aHUS. Here, flow cytometry assays were used to evaluate the effects of aHUS-related mutations on FH regulation of PGA formation and characterize the mechanism. Utilizing recombinant fragments of FH spanning the entire length of the protein, we mapped the regions of FH most critical for limiting AP activity on the surface of isolated human platelets and neutrophils, as well as the regions most critical for regulating PGA formation in human whole blood stimulated with thrombin receptor-activating peptide (TRAP). FH domains 19–20 were the most critical for limiting AP activity on platelets, neutrophils, and at the platelet/granulocyte interface. The role of FH in PGA formation was attributed to its ability to regulate AP-mediated C5a generation. AHUS-related mutations in domains 19–20 caused differential effects on control of PGA formation and AP activity on platelets and neutrophils. Our data indicate FH C-terminal domains are key for regulating PGA formation, thus increased FH protection may have a beneficial impact on diseases characterized by increased PGA formation, such as cardiovascular disease. Additionally, aHUS-related mutations in domains 19–20 have varying effects on control of TRAP-mediated PGA formation, suggesting that some, but not all, aHUS-related mutations may cause increased PGA formation that contributes to excessive thrombosis in patients with aHUS.
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Affiliation(s)
- Adam Z Blatt
- Department of Medical Microbiology and Immunology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, United States
| | - Gurpanna Saggu
- Department of Medical Microbiology and Immunology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, United States
| | - Claudio Cortes
- Department of Biomedical Sciences, Oakland University William Beaumont School of Medicine, Rochester, MI, United States
| | - Andrew P Herbert
- The School of Chemistry, University of Edinburgh, Edinburgh, United Kingdom
| | - David Kavanagh
- The National Renal Complement Therapeutics Centre, Newcastle upon Tyne, United Kingdom.,Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Daniel Ricklin
- Department of Pharmaceutical Sciences, University of Basel, Basel, Switzerland.,Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - John D Lambris
- Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Viviana P Ferreira
- Department of Medical Microbiology and Immunology, University of Toledo College of Medicine and Life Sciences, Toledo, OH, United States
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8
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Nishi H, Furuhashi K, Cullere X, Saggu G, Miller MJ, Chen Y, Rosetti F, Hamilton SL, Yang L, Pittman SP, Liao J, Herter JM, Berry JC, DeAngelo DJ, Zhu C, Tsokos GC, Mayadas TN. Neutrophil FcγRIIA promotes IgG-mediated glomerular neutrophil capture via Abl/Src kinases. J Clin Invest 2017; 127:3810-3826. [PMID: 28891817 DOI: 10.1172/jci94039] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 07/18/2017] [Indexed: 12/30/2022] Open
Abstract
The kidney glomerular capillaries are frequent sites of immune complex deposition and subsequent neutrophil accumulation in post-infectious and rapidly progressive glomerulonephritis. However, the mechanisms of neutrophil recruitment remain enigmatic, and there is no targeted therapeutic to avert this proximal event in glomerular inflammation. The uniquely human activating Fc receptor FcγRIIA promotes glomerular neutrophil accumulation and damage in anti-glomerular basement membrane-induced (anti-GBM-induced) glomerulonephritis when expressed on murine neutrophils. Here, we found that neutrophils are directly captured by immobilized IgG antibodies under physiological flow conditions in vitro through FcγRIIA-dependent, Abl/Src tyrosine kinase-mediated F-actin polymerization. Biophysical measurements showed that the lifetime of FcγRIIA-IgG bonds increased under mechanical force in an F-actin-dependent manner, which could enable the capture of neutrophils under physiological flow. Kidney intravital microscopy revealed that circulating neutrophils, which were similar in diameter to glomerular capillaries, abruptly arrested following anti-GBM antibody deposition via neutrophil FcγRIIA and Abl/Src kinases. Accordingly, inhibition of Abl/Src with bosutinib reduced FcγRIIA-mediated glomerular neutrophil accumulation and renal injury in experimental, crescentic anti-GBM nephritis. These data identify a pathway of neutrophil recruitment within glomerular capillaries following IgG deposition that may be targeted by bosutinib to avert glomerular injury.
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Affiliation(s)
- Hiroshi Nishi
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Kazuhiro Furuhashi
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Xavier Cullere
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Gurpanna Saggu
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Mark J Miller
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Yunfeng Chen
- Woodruff School of Mechanical Engineering and Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia, USA
| | - Florencia Rosetti
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Samantha L Hamilton
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Lihua Yang
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Spencer P Pittman
- Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Jiexi Liao
- Woodruff School of Mechanical Engineering and Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia, USA
| | - Jan M Herter
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Jeffrey C Berry
- Donald Danforth Plant Science Center, St. Louis, Missouri, USA
| | - Daniel J DeAngelo
- Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, Massachusetts, USA
| | - Cheng Zhu
- Woodruff School of Mechanical Engineering and Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia, USA
| | - George C Tsokos
- Division of Rheumatology, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts, USA
| | - Tanya N Mayadas
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
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9
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Li X, Cullere X, Nishi H, Saggu G, Durand E, Mansour MK, Tam JM, Song XY, Lin X, Vyas JM, Mayadas T. PKC-δ activation in neutrophils promotes fungal clearance. J Leukoc Biol 2016; 100:581-8. [PMID: 26965632 PMCID: PMC6608027 DOI: 10.1189/jlb.4a0915-405r] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 02/02/2016] [Accepted: 02/17/2016] [Indexed: 12/18/2022] Open
Abstract
The C-type lectin receptor dectin-1 and the integrin Mac-1 have key roles in controlling fungal infection. Here, we demonstrate that dectin-1- and Mac-1-induced activation of protein kinase Cδ in neutrophils, independent of the Card9 adaptor, is required for reactive oxygen species production and for intracellular killing upon Candida albicans uptake. Protein kinase Cδ was also required for zymosan-induced cytokine generation in neutrophils. In macrophages, protein kinase Cδ deficiency prevented fungi-induced reactive oxygen species generation but had no effect on activation of TGF-β-activated kinase-1, an effector of Card9, or nuclear factor κB activation, nor did it affect phagolysosomal maturation, autophagy, or intracellular C. albicans killing. In vivo, protein kinase Cδ-deficient mice were highly susceptible to C. albicans and Aspergillus fumigatus infection, which was partially rescued with adoptively transferred wild-type neutrophils. Thus, protein kinase Cδ activation downstream of dectin-1 and Mac-1 has an important role in neutrophil, but not macrophage, functions required for host defense against fungal pathogens.
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Affiliation(s)
- Xun Li
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA; Department of Laboratory Medicine, The First Affiliated Hospital, Medical College of Xiamen University, Xiamen, Fujian, China
| | - Xavier Cullere
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Hiroshi Nishi
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Gurpanna Saggu
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Enrique Durand
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Michael K Mansour
- Department of Medicine, Division of Infectious Diseases, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA; and
| | - Jenny M Tam
- Department of Medicine, Division of Infectious Diseases, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA; and
| | - Xiu-Yu Song
- Department of Laboratory Medicine, The First Affiliated Hospital, Medical College of Xiamen University, Xiamen, Fujian, China
| | - Xin Lin
- Department of Molecular and Cellular Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Jatin M Vyas
- Department of Medicine, Division of Infectious Diseases, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA; and
| | - Tanya Mayadas
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA;
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10
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Blatt AZ, Saggu G, Kulkarni KV, Cortes C, Thurman JM, Ricklin D, Lambris JD, Valenzuela JG, Ferreira VP. Properdin-Mediated C5a Production Enhances Stable Binding of Platelets to Granulocytes in Human Whole Blood. J Immunol 2016; 196:4671-4680. [PMID: 27183616 DOI: 10.4049/jimmunol.1600040] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 03/28/2016] [Indexed: 12/11/2022]
Abstract
Enhanced levels of platelet/granulocyte aggregates (PGAs) are found in patients suffering from many different inflammatory vascular diseases, and their formation in animal models of vascular disease is associated with increased thromboinflammation and worsened outcomes. The complement system, a part of the innate immune system, influences PGA formation, but the mechanisms for its effects are unknown. In this study, we have defined complement-mediated mechanisms that enhance PGA formation in human whole blood stimulated with thrombin receptor-activating peptide (TRAP) using ex vivo flow cytometry assays. We demonstrate that physiological properdin, a positive regulator of complement alternative pathway activity, increases PGA formation when added to TRAP-stimulated blood. All physiological properdin forms increase PGA formation, but properdin tetramers are the most efficient at increasing complement activity and PGA formation. Inhibition of endogenous properdin, either circulating in the blood or produced locally by leukocytes, impairs TRAP-mediated PGA formation to the same level as specific inhibition of either the alternative or classical pathway. Additionally, blocking the interaction of C5a with its cellular receptor prevents properdin-mediated increases in PGA formation. Adding either properdin tetramers or C5a to whole blood increases CD11b expression on granulocytes, and this increase is prevented by blockade of the C5a-C5a receptor axis. Finally, we demonstrate that the effects of properdin on PGA formation are tightly regulated by Factor H. Cumulatively, our data indicate that properdin enhances PGA formation via increased production of C5a, and that inhibition of properdin function has therapeutic potential to limit thromboinflammation in diseases characterized by increased PGA formation.
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Affiliation(s)
- Adam Z Blatt
- Department of Medical Microbiology and Immunology, University of Toledo College of Medicine and Life Sciences, Toledo, Ohio
| | - Gurpanna Saggu
- Department of Medical Microbiology and Immunology, University of Toledo College of Medicine and Life Sciences, Toledo, Ohio
| | - Koustubh V Kulkarni
- Department of Medical Microbiology and Immunology, University of Toledo College of Medicine and Life Sciences, Toledo, Ohio
| | - Claudio Cortes
- Department of Biomedical Sciences, Oakland University William Beaumont School of Medicine, Rochester, Michigan
| | - Joshua M Thurman
- Department of Medicine, University of Colorado School of Medicine, Aurora, Colorado
| | - Daniel Ricklin
- Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - John D Lambris
- Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Jesus G Valenzuela
- Vector Molecular Biology Section, LMVR, National Institute of Allergy and Infectious Diseases, NIH, Rockville, Maryland
| | - Viviana P Ferreira
- Department of Medical Microbiology and Immunology, University of Toledo College of Medicine and Life Sciences, Toledo, Ohio
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11
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Buscher K, Wang H, Zhang X, Striewski P, Wirth B, Saggu G, Lütke-Enking S, Mayadas TN, Ley K, Sorokin L, Song J. Protection from septic peritonitis by rapid neutrophil recruitment through omental high endothelial venules. Nat Commun 2016; 7:10828. [PMID: 26940548 PMCID: PMC4785224 DOI: 10.1038/ncomms10828] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 01/25/2016] [Indexed: 12/22/2022] Open
Abstract
Acute peritonitis is a frequent medical condition that can trigger severe sepsis as a life-threatening complication. Neutrophils are first-responders in infection but recruitment mechanisms to the abdominal cavity remain poorly defined. Here, we demonstrate that high endothelial venules (HEVs) of the greater omentum constitute a main entry pathway in TNFα-, Escherichia coli (E. coli)- and caecal ligation and puncture-induced models of inflammation. Neutrophil transmigration across HEVs is faster than across conventional postcapillary venules and requires a unique set of adhesion receptors including peripheral node addressin, E-, L-selectin and Mac-1 but not P-selectin or LFA-1. Omental milky spots readily concentrate intra-abdominal E. coli where macrophages and recruited neutrophils collaborate in phagocytosis and killing. Inhibition of the omental neutrophil response exacerbates septic progression of peritonitis. This data identifies HEVs as a clinically relevant vascular recruitment site for neutrophils in acute peritonitis that is indispensable for host defence against early systemic bacterial spread and sepsis.
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Affiliation(s)
- Konrad Buscher
- Institute of Physiological Chemistry and Pathobiochemistry, University of Muenster, Muenster 48149, Germany
- Cells-in-Motion Cluster of Excellence, University of Muenster, Muenster 48149, Germany
- Department of Nephrology and Rheumatology, University of Muenster, Muenster 48149, Germany
| | - Huiyu Wang
- Institute of Physiological Chemistry and Pathobiochemistry, University of Muenster, Muenster 48149, Germany
- Cells-in-Motion Cluster of Excellence, University of Muenster, Muenster 48149, Germany
| | - Xueli Zhang
- Institute of Physiological Chemistry and Pathobiochemistry, University of Muenster, Muenster 48149, Germany
- Cells-in-Motion Cluster of Excellence, University of Muenster, Muenster 48149, Germany
| | - Paul Striewski
- Cells-in-Motion Cluster of Excellence, University of Muenster, Muenster 48149, Germany
- Institute for Computational and Applied Mathematics, University of Muenster, Muenster 48149, Germany
| | - Benedikt Wirth
- Cells-in-Motion Cluster of Excellence, University of Muenster, Muenster 48149, Germany
- Institute for Computational and Applied Mathematics, University of Muenster, Muenster 48149, Germany
| | - Gurpanna Saggu
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Stefan Lütke-Enking
- Institute of Physiological Chemistry and Pathobiochemistry, University of Muenster, Muenster 48149, Germany
- Cells-in-Motion Cluster of Excellence, University of Muenster, Muenster 48149, Germany
| | - Tanya N. Mayadas
- Center for Excellence in Vascular Biology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Klaus Ley
- Division of Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, California 92037, USA
| | - Lydia Sorokin
- Institute of Physiological Chemistry and Pathobiochemistry, University of Muenster, Muenster 48149, Germany
- Cells-in-Motion Cluster of Excellence, University of Muenster, Muenster 48149, Germany
| | - Jian Song
- Institute of Physiological Chemistry and Pathobiochemistry, University of Muenster, Muenster 48149, Germany
- Cells-in-Motion Cluster of Excellence, University of Muenster, Muenster 48149, Germany
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12
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Blatt A, Saggu G, Cortes C, Ferreira V. Essential regulatory role for factor H and properdin in the formation of platelet/granulocyte aggregates in human whole blood (HUM1P.301). The Journal of Immunology 2014. [DOI: 10.4049/jimmunol.192.supp.52.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
An increased number of activated platelets and platelet/leukocyte aggregates are found in patients with chronic inflammatory diseases including cardiovascular disease. Platelet/leukocyte aggregates are not only indicative of cardiovascular disease, but also play an important role in the initiation and progression of disease. The role that complement regulatory proteins properdin and factor H play in controlling the formation of platelet/granulocyte aggregates, as well as which factor H domains are essential for the interaction with platelets on which complement is activating remain unknown. Here, we have determined that (a) the C-terminus of factor H is critical for the ability of the protein to protect platelets from the alternative pathway of complement, (b) blocking of properdin function using an inhibitory antibody significantly reduces the formation of platelet/granulocyte aggregates, while adding properdin increases the formation of these aggregates in a dose-dependent manner, and (c) factor H controls the properdin-mediated formation of platelet/granulocyte aggregates. Our data support critical roles for properdin and the C-terminus of factor H in controlling the formation of platelet/granulocyte aggregates. These studies may contribute to the understanding of the pathophysiological mechanisms involved in the interaction between platelets and granulocytes in chronic inflammatory diseases.
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Affiliation(s)
- Adam Blatt
- 1Medical Microbiology and Immunology, University of Toledo College of Medicine, Toledo, OH
| | - Gurpanna Saggu
- 1Medical Microbiology and Immunology, University of Toledo College of Medicine, Toledo, OH
| | - Claudio Cortes
- 2Medical Immunology and Microbiology, Medical University of the Americas, West Indies, Saint Kitts and Nevis
| | - Viviana Ferreira
- 1Medical Microbiology and Immunology, University of Toledo College of Medicine, Toledo, OH
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13
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Saggu G, Cortes C, Emch HN, Ramirez G, Worth RG, Ferreira VP. Identification of a novel mode of complement activation on stimulated platelets mediated by properdin and C3(H2O). J Immunol 2013; 190:6457-67. [PMID: 23677468 PMCID: PMC3784323 DOI: 10.4049/jimmunol.1300610] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Elevated numbers of activated platelets circulate in patients with chronic inflammatory diseases, including atherosclerosis and coronary disease. Activated platelets can activate the complement system. Although complement activation is essential for immune responses and removal of spent cells from circulation, it also contributes to inflammation and thrombosis, especially in patients with defective complement regulation. Proinflammatory activated leukocytes, which interact directly with platelets in response to vascular injury, are among the main sources of properdin, a positive regulator of the alternative pathway. The role of properdin in complement activation on stimulated platelets is unknown. Our data show that physiological forms of human properdin bind directly to human platelets after activation by strong agonists in the absence of C3, and bind nonproportionally to surface CD62P expression. Activation of the alternative pathway on activated platelets occurs when properdin is on the surface and recruits C3b or C3(H2O) to form C3b,Bb or a novel cell-bound C3 convertase [C3(H2O),Bb], which normally is present only in the fluid phase. Alternatively, properdin can be recruited by C3(H2O) on the platelet surface, promoting complement activation. Inhibition of factor H-mediated cell surface complement regulation significantly increases complement deposition on activated platelets with surface properdin. Finally, properdin released by activated neutrophils binds to activated platelets. Altogether, these data suggest novel molecular mechanisms for alternative pathway activation on stimulated platelets that may contribute to localization of inflammation at sites of vascular injury and thrombosis.
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Affiliation(s)
- Gurpanna Saggu
- Department of Medical Microbiology and Immunology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH. 43614
| | - Claudio Cortes
- Department of Medical Microbiology and Immunology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH. 43614
- Department of Molecular Sciences, Medical University of the Americas, Charlestown, Nevis, West Indies
| | - Heather N. Emch
- Department of Medical Microbiology and Immunology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH. 43614
| | - Galia Ramirez
- Department of Medical Microbiology and Immunology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH. 43614
- Department of Preventive Animal Medicine, Faculty of Veterinary Medicine, University of Chile, Santiago, Chile
| | - Randall G. Worth
- Department of Medical Microbiology and Immunology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH. 43614
| | - Viviana P. Ferreira
- Department of Medical Microbiology and Immunology, College of Medicine and Life Sciences, University of Toledo, Toledo, OH. 43614
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14
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Ferreira V, Saggu G, Nauli S, Cortes C. Complement regulatory protein properdin promotes complement activation on platelets and increases platelet-leukocyte aggregate formation (P1311). The Journal of Immunology 2013. [DOI: 10.4049/jimmunol.190.supp.63.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
An increased number of activated platelets and platelet-leukocyte aggregates are found in patients with chronic inflammatory diseases. Activated platelets can activate the complement system. We have recently determined that properdin, a positive regulator of the alternative pathway that is produced mainly by stimulated leukocytes, promotes complement activation on activated, but not resting, platelets. Unfractionated properdin (that has non-physiological aggregates) induces formation of platelet-leukocyte aggregates. However, the roles that physiological dimers, trimers, and tetramers of properdin play, as well as the molecular mechanisms by which the alternative pathway is involved in this phenomena remain unknown. Here, we have determined that (a) activated platelets, as well as neutrophils, bind physiological forms of properdin and neutrophil-derived properdin; (b) properdin mediates a novel mechanism for alternative pathway activation on activated platelets; and (c) physiological properdin leads to increased platelet-leukocyte aggregate formation in thrombin receptor-stimulated whole blood. The effects of shear stress in properdin-induced aggregate formation and differences between leukocyte subpopulations in platelet-leukocyte aggregate formation have also been assessed. Our data support a role for properdin in cellular microenvironments, contributing to complement activation and aggregate formation, with potential consequences in inflammation pathophysiology.
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Affiliation(s)
- Viviana Ferreira
- 1Medical Microbiology and Immunology, University of Toledo College of Medicine and Life Sciences, Toledo, OH
| | - Gurpanna Saggu
- 1Medical Microbiology and Immunology, University of Toledo College of Medicine and Life Sciences, Toledo, OH
| | - Surya Nauli
- 2Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH
| | - Claudio Cortes
- 3Medical Immunology and Microbiology, Medical University of the Americas, Charlestown, Saint Kitts and Nevis
- 1Medical Microbiology and Immunology, University of Toledo College of Medicine and Life Sciences, Toledo, OH
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15
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Cortes C, Ohtola JA, Saggu G, Ferreira VP. Local release of properdin in the cellular microenvironment: role in pattern recognition and amplification of the alternative pathway of complement. Front Immunol 2013; 3:412. [PMID: 23335922 PMCID: PMC3547370 DOI: 10.3389/fimmu.2012.00412] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Accepted: 12/18/2012] [Indexed: 12/24/2022] Open
Abstract
Properdin, the only positive regulatory protein of the complement system, acts as both a stabilizer of the alternative pathway (AP) convertases and as a selective pattern recognition molecule of certain microorganisms and host cells (i.e., apoptotic/necrotic cells) by serving as a platform for de novo C3b,Bb assembly. Properdin, a highly positively charged protein, normally exists as cyclic dimers (P(2)), trimers (P(3)), and tetramers (P(4)) of head-to-tail associations of monomeric 53 kDa subunits. While most complement proteins are produced mainly in the liver, properdin is synthesized primarily by various cell types, including neutrophils, monocytes, primary T cells, and shear-stressed endothelial cells resulting in properdin serum levels of 4-25 μg/ml. Multiple inflammatory agonists stimulate the release of properdin from stimulated leukocytes into the cellular microenvironment. Concentrated, focused increases in properdin levels may lead to stabilization and initiation of AP convertases, thus greatly amplifying the complement response to a local stimulus. This review highlights current knowledge related to these properties and discusses the implications of properdin production in a pro-inflammatory microenvironment.
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Affiliation(s)
- Claudio Cortes
- Department of Medical Microbiology and Immunology, College of Medicine and Life Sciences, University of Toledo Toledo, OH, USA ; Department Medical Immunology and Microbiology, Medical University of the Americas West Indies, Nevis
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16
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Ferreira VP, Saggu G, Pereira MH, Araújo RN, Vale VF, Lima-III KF, Pangburn MK, MC.Ribeiro J, Gontijo NF, Collin N, Valenzuela JG. LJM19, a salivary protein from the sand fly vector that transmits leishmaniasis, is a novel inhibitor of the classical pathway of complement. Immunobiology 2012. [DOI: 10.1016/j.imbio.2012.08.153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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