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Neeli I, Moarefian M, Kuseladass J, Dwivedi N, Jones C, Radic M. Neutrophil attachment via Mac-1 ( αMβ2; CD11b/CD18; CR3) integrins induces PAD4 deimination of profilin and histone H3. Philos Trans R Soc Lond B Biol Sci 2023; 378:20220247. [PMID: 37778386 PMCID: PMC10542442 DOI: 10.1098/rstb.2022.0247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 08/07/2023] [Indexed: 10/03/2023] Open
Abstract
Neutrophil adhesion to endothelia, entry into tissues and chemotaxis constitute essential steps in the immune response to infections that drive inflammation. Neutrophils bind to other cells and migrate via adhesion receptors, notably the αMβ2 integrin dimer (also called Mac-1, CR3 or CD11b/CD18). Here, the response of neutrophils to integrin engagement was examined by monitoring the activity of peptidylarginine deiminase 4 (PAD4). Histone H3 deimination was strongly stimulated by manganese, an integrin-activating divalent cation, even in the absence of additional inflammatory stimuli. Manganese-induced cell attachment resulted in neutrophil swarm formation that paralleled histone deimination, whereas antibodies that impair integrin binding prevented both cell adhesion and histone deimination. Manganese treatment led to putative deimination of profilin, a protein that functions as an actin-organizing hub, as detected by two-dimensional gel electrophoresis and citrulline immunoblotting. Cl-amidine, a covalent inhibitor of PAD4, and GSK484, a specific PAD4 inhibitor, blocked profilin deimination. Neutrophil migration toward leukotriene B4 and toward synovial fluid from a rheumatoid arthritis patient were inhibited by chloramidine, thus supporting the contribution of deimination to chemotaxis. The data, based on a simplified system for integrin activation, imply a mechanism whereby integrin attachment coordinates neutrophil responses to inflammation and orchestrates deimination of nuclear and cytoskeletal proteins. This article is part of the Theo Murphy meeting issue 'The virtues and vices of protein citrullination'.
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Affiliation(s)
- Indira Neeli
- Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Maryam Moarefian
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA 24061, USA
| | - Jayalakshmi Kuseladass
- Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Nishant Dwivedi
- Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, TN 38163, USA
| | - Caroline Jones
- Department of Bioengineering, Erik Jonsson School of Engineering and Computer Science, University of Texas at Dallas, Richardson, TX 75080, USA
| | - Marko Radic
- Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, TN 38163, USA
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Sharma J, Collins TD, Roach T, Mishra S, Lam BK, Mohamed ZS, Veal AE, Polk TB, Jones A, Cornaby C, Haider MI, Zeumer-Spataro L, Johnson HM, Morel LM, Larkin J. Suppressor of cytokine signaling-1 mimetic peptides attenuate lymphocyte activation in the MRL/lpr mouse autoimmune model. Sci Rep 2021; 11:6354. [PMID: 33737712 PMCID: PMC7973732 DOI: 10.1038/s41598-021-86017-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 03/09/2021] [Indexed: 12/30/2022] Open
Abstract
Autoimmune diseases are driven largely by a pathogenic cytokine milieu produced by aberrantly activated lymphocytes. Many cytokines, including interferon gamma (IFN-γ), utilize the JAK/STAT pathway for signal propagation. Suppressor of Cytokine Signaling-1 (SOCS1) is an inducible, intracellular protein that regulates IFN-γ signaling by dampening JAK/STAT signaling. Using Fas deficient, MRL/MpJ-Faslpr/J (MRL/lpr) mice, which develop lupus-like disease spontaneously, we tested the hypothesis that a peptide mimic of the SOCS1 kinase inhibitory region (SOCS1-KIR) would inhibit lymphocyte activation and modulate lupus-associated pathologies. Consistent with in vitro studies, SOCS1-KIR intraperitoneal administration reduced the frequency, activation, and cytokine production of memory CD8+ and CD4+ T lymphocytes within the peripheral blood, spleen, and lymph nodes. In addition, SOCS1-KIR administration reduced lymphadenopathy, severity of skin lesions, autoantibody production, and modestly reduced kidney pathology. On a cellular level, peritoneal SOCS1-KIR administration enhanced Foxp3 expression in total splenic and follicular regulatory T cells, reduced the effector memory/naïve T lymphocyte ratio for both CD4+ and CD8+ cells, and reduced the frequency of GL7+ germinal center enriched B cells. Together, these data show that SOCS1-KIR treatment reduced auto-reactive lymphocyte effector functions and suggest that therapeutic targeting of the SOCS1 pathway through peptide administration may have efficacy in mitigating autoimmune pathologies.
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Affiliation(s)
- Jatin Sharma
- Department of Microbiology & Cell Science, University of Florida, Museum Road Building 981, PO Box 110700, Gainesville, FL, 32611, USA
| | - Teresa D Collins
- Department of Microbiology & Cell Science, University of Florida, Museum Road Building 981, PO Box 110700, Gainesville, FL, 32611, USA
| | - Tracoyia Roach
- Department of Pathology, Immunology, and Laboratory Medicine, University of Florida, Gainesville, FL, 32610, USA
| | - Shiwangi Mishra
- Department of Microbiology & Cell Science, University of Florida, Museum Road Building 981, PO Box 110700, Gainesville, FL, 32611, USA
| | - Brandon K Lam
- Department of Microbiology & Cell Science, University of Florida, Museum Road Building 981, PO Box 110700, Gainesville, FL, 32611, USA
| | - Zaynab Sidi Mohamed
- Department of Microbiology & Cell Science, University of Florida, Museum Road Building 981, PO Box 110700, Gainesville, FL, 32611, USA
| | - Antia E Veal
- Department of Microbiology & Cell Science, University of Florida, Museum Road Building 981, PO Box 110700, Gainesville, FL, 32611, USA
| | - Timothy B Polk
- Department of Microbiology & Cell Science, University of Florida, Museum Road Building 981, PO Box 110700, Gainesville, FL, 32611, USA
| | - Amari Jones
- Department of Microbiology & Cell Science, University of Florida, Museum Road Building 981, PO Box 110700, Gainesville, FL, 32611, USA
| | - Caleb Cornaby
- Department of Pathology, Immunology, and Laboratory Medicine, University of Florida, Gainesville, FL, 32610, USA
| | - Mohammed I Haider
- Department of Microbiology & Cell Science, University of Florida, Museum Road Building 981, PO Box 110700, Gainesville, FL, 32611, USA
| | - Leilani Zeumer-Spataro
- Department of Pathology, Immunology, and Laboratory Medicine, University of Florida, Gainesville, FL, 32610, USA
| | - Howard M Johnson
- Department of Microbiology & Cell Science, University of Florida, Museum Road Building 981, PO Box 110700, Gainesville, FL, 32611, USA
| | - Laurence M Morel
- Department of Pathology, Immunology, and Laboratory Medicine, University of Florida, Gainesville, FL, 32610, USA
| | - Joseph Larkin
- Department of Microbiology & Cell Science, University of Florida, Museum Road Building 981, PO Box 110700, Gainesville, FL, 32611, USA.
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3
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Abstract
Defective clearance of apoptotic cells in MFG-E8 deficient mice results in lupus-like disease in the mixed B6x129, but not pure B6 background. The lack of overt autoimmunity in MFG-E8-/- B6 mice suggests that accumulation of apoptotic cells is not sufficient to break central tolerance. However, the delayed clearance of apoptotic cells in the follicles of MFG-E8-/- B6 mice provides an excellent opportunity to investigate how B cells respond to excessive apoptotic cells in the periphery under relatively non-inflammatory conditions. In MFG-E8-/- B6 mice, we found increased IgG2c production against apoptotic cells and oxidized LDL. Apoptotic cell induced antibody responses depended on MyD88 signal and T cell help. In addition, MFG-E8-/- B6 mice had enlarged MZ B cell compartments as well as an enhanced antibody response to NP-Ficoll. Moreover, a significant percentage of MZ B cells in aged MFG-E8-/- B6 mice migrated into follicles. Injecting apoptotic cells or oxidized LDL into wild type mice as well as physiological accumulation of LDL in ApoE-/- mice recapitulated the translocation of MZ B cells. To determine how MFG-E8 deficiency affects the functions of autoreactive B cells specific for nucleic acids in the periphery under non-inflammatory conditions, we utilized BCR transgenic mice to bypass central selection and compared the differentiation of TLR9 dependent anti-dsDNA 56R B cells and TLR7 dependent anti-ssRNA H564 B cells in MFG-E8-/- mice. In MFG-E8-/- 56R mice, anti-dsDNA specific 56R/Vκ38c B cells differentiated into MZ B cells but not AFCs. On the contrary, in MFG-E8-/-H564 mice, anti-ssRNA specific H564 B cells further differentiated into GC B cells and AFCs. Adoptive transfer of activated autoreactive B cells confirmed that H564 B cells were more sensitive to apoptotic cell antigens than 56R B cells. Our observations provide new insights about the MZ B cell translocation in lupus patients as well as the dichotomy of TLR9 and TLR7 signals in the pathogenesis of lupus.
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Affiliation(s)
- YuFeng Peng
- Division of Rheumatology, Department of Medicine, University of Washington, Seattle, Washington, United States of America
- * E-mail:
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Loureiro ME, Zorzetto-Fernandes AL, Radoshitzky S, Chi X, Dallari S, Marooki N, Lèger P, Foscaldi S, Harjono V, Sharma S, Zid BM, López N, de la Torre JC, Bavari S, Zúñiga E. DDX3 suppresses type I interferons and favors viral replication during Arenavirus infection. PLoS Pathog 2018; 14:e1007125. [PMID: 30001425 PMCID: PMC6042795 DOI: 10.1371/journal.ppat.1007125] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [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: 10/25/2017] [Accepted: 05/27/2018] [Indexed: 11/19/2022] Open
Abstract
Several arenaviruses cause hemorrhagic fever (HF) diseases that are associated with high morbidity and mortality in humans. Accordingly, HF arenaviruses have been listed as top-priority emerging diseases for which countermeasures are urgently needed. Because arenavirus nucleoprotein (NP) plays critical roles in both virus multiplication and immune-evasion, we used an unbiased proteomic approach to identify NP-interacting proteins in human cells. DDX3, a DEAD-box ATP-dependent-RNA-helicase, interacted with NP in both NP-transfected and virus-infected cells. Importantly, DDX3 deficiency compromised the propagation of both Old and New World arenaviruses, including the HF arenaviruses Lassa and Junin viruses. The DDX3 role in promoting arenavirus multiplication associated with both a previously un-recognized DDX3 inhibitory role in type I interferon production in arenavirus infected cells and a positive DDX3 effect on arenavirus RNA synthesis that was dependent on its ATPase and Helicase activities. Our results uncover novel mechanisms used by arenaviruses to exploit the host machinery and subvert immunity, singling out DDX3 as a potential host target for developing new therapies against highly pathogenic arenaviruses.
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Affiliation(s)
- María Eugenia Loureiro
- Division of Biological Sciences, University of California San Diego, La Jolla, CA, United States of America
| | | | - Sheli Radoshitzky
- Molecular and Translational Sciences Division, United States Army Medical Research Institute of Infectious Diseases, Frederick, MD, United States of America
| | - Xiaoli Chi
- Molecular and Translational Sciences Division, United States Army Medical Research Institute of Infectious Diseases, Frederick, MD, United States of America
| | - Simone Dallari
- Division of Biological Sciences, University of California San Diego, La Jolla, CA, United States of America
| | - Nuha Marooki
- Division of Biological Sciences, University of California San Diego, La Jolla, CA, United States of America
| | - Psylvia Lèger
- Division of Biological Sciences, University of California San Diego, La Jolla, CA, United States of America
| | - Sabrina Foscaldi
- Centro de Virología Animal, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Vince Harjono
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA, United States of America
| | - Sonia Sharma
- La Jolla Institute for Allergy and Immunology, La Jolla, CA, United States of America
| | - Brian M. Zid
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA, United States of America
| | - Nora López
- Centro de Virología Animal, Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Juan Carlos de la Torre
- The Scripps Research Institute, Department of Immunology and Microbiology, La Jolla, CA, United States of America
| | - Sina Bavari
- Molecular and Translational Sciences Division, United States Army Medical Research Institute of Infectious Diseases, Frederick, MD, United States of America
| | - Elina Zúñiga
- Division of Biological Sciences, University of California San Diego, La Jolla, CA, United States of America
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Bhattacharya J, Pappas K, Toz B, Aranow C, Mackay M, Gregersen PK, Doumbo O, Traore AK, Lesser ML, McMahon M, Utset T, Silverman E, Levy D, McCune WJ, Jolly M, Wallace D, Weisman M, Romero-Diaz J, Diamond B. Serologic features of cohorts with variable genetic risk for systemic lupus erythematosus. Mol Med 2018; 24:24. [PMID: 30134810 PMCID: PMC6016868 DOI: 10.1186/s10020-018-0019-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 04/02/2018] [Accepted: 04/03/2018] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Systemic lupus erythematosus (SLE) is an autoimmune disease with genetic, hormonal, and environmental influences. In Western Europe and North America, individuals of West African descent have a 3-4 fold greater incidence of SLE than Caucasians. Paradoxically, West Africans in sub-Saharan Africa appear to have a low incidence of SLE, and some studies suggest a milder disease with less nephritis. In this study, we analyzed sera from African American female SLE patients and four other cohorts, one with SLE and others with varying degrees of risk for SLE in order to identify serologic factors that might correlate with risk of or protection against SLE. METHODS Our cohorts included West African women with previous malaria infection assumed to be protected from development of SLE, clinically unaffected sisters of SLE patients with high risk of developing SLE, healthy African American women with intermediate risk, healthy Caucasian women with low risk of developing SLE, and women with a diagnosis of SLE. We developed a lupus risk index (LRI) based on titers of IgM and IgG anti-double stranded DNA antibodies and levels of C1q. RESULTS The risk index was highest in SLE patients; second highest in unaffected sisters of SLE patients; third highest in healthy African-American women and lowest in healthy Caucasian women and malaria-exposed West African women. CONCLUSION This risk index may be useful in early interventions to prevent SLE. In addition, it suggests new therapeutic approaches for the treatment of SLE.
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Affiliation(s)
- Jyotsna Bhattacharya
- The Feinstein Institute for Medical Research, Center for Autoimmune, Musculoskeletal and Hematopoietic Diseases, 350 Community Dr, Manhasset, NY, 11030, USA
| | - Karalyn Pappas
- Department of Statistical Science, Cornell University, Ithaca, NY, USA
| | - Bahtiyar Toz
- Department of Internal Medicine, Istanbul University, Istanbul, Turkey
| | - Cynthia Aranow
- The Feinstein Institute for Medical Research, Center for Autoimmune, Musculoskeletal and Hematopoietic Diseases, 350 Community Dr, Manhasset, NY, 11030, USA
| | - Meggan Mackay
- The Feinstein Institute for Medical Research, Center for Autoimmune, Musculoskeletal and Hematopoietic Diseases, 350 Community Dr, Manhasset, NY, 11030, USA
| | - Peter K Gregersen
- The Feinstein Institute for Medical Research, Center for Genomics and Human Genetics, Manhasset, NY, USA
| | | | - Abdel Kader Traore
- Deputy of the Department of Internal Medicine, University Hospital, Bamako, Mali
| | - Martin L Lesser
- The Feinstein Institute for Medical Research, Center of Biostatistics Unit Manhasset, Manhasset, NY, USA
| | - Maureen McMahon
- UCLA David Geffen School of Medicine, Los Angeles, CA, 90095, USA
| | - Tammy Utset
- University of Chicago Medical Center, Chicago, IL, USA
| | - Earl Silverman
- Hospital for Sick Children, University of Toronto, Toronto, ON M5G, 1X8, Canada
| | - Deborah Levy
- Hospital for Sick Children, University of Toronto, Toronto, ON M5G, 1X8, Canada
| | | | | | - Daniel Wallace
- Cedars Sinai Medical Center, Los Angeles, CA, 90048, USA
| | | | - Juanita Romero-Diaz
- Instituto Nacional de Ciencias Medicas y Nutrician Salvador Zubiran, Mexico City, Mexico
| | - Betty Diamond
- The Feinstein Institute for Medical Research, Center for Autoimmune, Musculoskeletal and Hematopoietic Diseases, 350 Community Dr, Manhasset, NY, 11030, USA.
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6
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Tursi SA, Lee EY, Medeiros NJ, Lee MH, Nicastro LK, Buttaro B, Gallucci S, Wilson RP, Wong GCL, Tükel Ç. Bacterial amyloid curli acts as a carrier for DNA to elicit an autoimmune response via TLR2 and TLR9. PLoS Pathog 2017; 13:e1006315. [PMID: 28410407 PMCID: PMC5406031 DOI: 10.1371/journal.ppat.1006315] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [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: 11/22/2016] [Revised: 04/26/2017] [Accepted: 03/24/2017] [Indexed: 12/27/2022] Open
Abstract
Bacterial biofilms are associated with numerous human infections. The predominant protein expressed in enteric biofilms is the amyloid curli, which forms highly immunogenic complexes with DNA. Infection with curli-expressing bacteria or systemic exposure to purified curli-DNA complexes triggers autoimmunity via the generation of type I interferons (IFNs) and anti-double-stranded DNA antibodies. Here, we show that DNA complexed with amyloid curli powerfully stimulates Toll-like receptor 9 (TLR9) through a two-step mechanism. First, the cross beta-sheet structure of curli is bound by cell-surface Toll-like receptor 2 (TLR2), enabling internalization of the complex into endosomes. After internalization, the curli-DNA immune complex binds strongly to endosomal TLR9, inducing production of type I IFNs. Analysis of wild-type and TLR2-deficient macrophages showed that TLR2 is the major receptor that drives the internalization of curli-DNA complexes. Suppression of TLR2 internalization via endocytosis inhibitors led to a significant decrease in Ifnβ expression. Confocal microscopy analysis confirmed that the TLR2-bound curli was required for shuttling of DNA to endosomal TLR9. Structural analysis using small-angle X-ray scattering revealed that incorporation of DNA into curli fibrils resulted in the formation of ordered curli-DNA immune complexes. Curli organizes parallel, double-stranded DNA rods at an inter-DNA spacing that matches up well with the steric size of TLR9. We also found that production of anti-double-stranded DNA autoantibodies in response to curli-DNA was attenuated in TLR2- and TLR9-deficient mice and in mice deficient in both TLR2 and TLR9 compared to wild-type mice, suggesting that both innate immune receptors are critical for shaping the autoimmune adaptive immune response. We also detected significantly lower levels of interferon-stimulated gene expression in response to purified curli-DNA in TLR2 and TLR9 deficient mice compared to wild-type mice, confirming that TLR2 and TLR9 are required for the induction of type I IFNs. Finally, we showed that curli-DNA complexes, but not cellulose, were responsible elicitation of the immune responses to bacterial biofilms. This study defines the series of events that lead to the severe pro-autoimmune effects of amyloid-expressing bacteria and suggest a mechanism by which amyloid curli acts as a carrier to break immune tolerance to DNA, leading to the activation of TLR9, production of type I IFNs, and subsequent production of autoantibodies.
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Affiliation(s)
- Sarah A. Tursi
- Department of Microbiology and Immunology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania, United States of America
| | - Ernest Y. Lee
- Department of Bioengineering, California Nano Systems Institute, University of California, Los Angeles, California, United States of America
| | - Nicole J. Medeiros
- Department of Microbiology and Immunology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania, United States of America
| | - Michael H. Lee
- Department of Microbiology and Immunology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania, United States of America
| | - Lauren K. Nicastro
- Department of Microbiology and Immunology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania, United States of America
| | - Bettina Buttaro
- Department of Microbiology and Immunology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania, United States of America
| | - Stefania Gallucci
- Department of Microbiology and Immunology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania, United States of America
| | - Ronald Paul Wilson
- Department of Microbiology and Immunology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania, United States of America
| | - Gerard C. L. Wong
- Department of Bioengineering, California Nano Systems Institute, University of California, Los Angeles, California, United States of America
- Department of Chemistry and Biochemistry, California Nano Systems Institute, University of California, Los Angeles, California, United States of America
- * E-mail: (CT); (GCLW)
| | - Çagla Tükel
- Department of Microbiology and Immunology, Lewis Katz School of Medicine, Temple University, Philadelphia, Pennsylvania, United States of America
- * E-mail: (CT); (GCLW)
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