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Verner JM, Arbuthnott HF, Ramachandran R, Bharadwaj M, Chaudhury N, Jou E. Emerging roles of type 1 innate lymphoid cells in tumour pathogenesis and cancer immunotherapy. EXPLORATION OF TARGETED ANTI-TUMOR THERAPY 2024; 5:296-315. [PMID: 38745765 PMCID: PMC11090689 DOI: 10.37349/etat.2024.00219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Accepted: 12/14/2023] [Indexed: 05/16/2024] Open
Abstract
Innate lymphoid cells (ILCs) are the most recently discovered class of innate immune cells found to have prominent roles in various human immune-related pathologies such as infection and autoimmune diseases. However, their role in cancer was largely unclear until recently, where several emerging studies over the past few years unanimously demonstrate ILCs to be critical players in tumour immunity. Being the innate counterpart of T cells, ILCs are potent cytokine producers through which they orchestrate the overall immune response upstream of adaptive immunity thereby modulating T cell function. Out of the major ILC subsets, ILC1s have gained significant traction as potential immunotherapeutic candidates due to their central involvement with the anti-tumour type 1 immune response. ILC1s are potent producers of the well-established anti-tumour cytokine interferon γ (IFNγ), and exert direct cytotoxicity against cancer cells in response to the cytokine interleukin-15 (IL-15). However, in advanced diseases, ILC1s are found to demonstrate an exhausted phenotype in the tumour microenvironment (TME) with impaired effector functions, characterised by decreased responsiveness to cytokines and reduced IFNγ production. Tumour cells produce immunomodulatory cytokines such as transforming growth factor β (TGFβ) and IL-23, and through these suppress ILC1 anti-tumour actfivities and converts ILC1s to pro-tumoural ILC3s respectively, resulting in disease progression. This review provides a comprehensive overview of ILC1s in tumour immunity, and discusses the exciting prospects of harnessing ILC1s for cancer immunotherapy, either alone or in combination with cytokine-based treatment. The exciting prospects of targeting the upstream innate immune system through ILC1s may surmount the limitations associated with adaptive immune T cell-based strategies used in the clinic currently, and overcome cancer immunotherapeutic resistance.
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Affiliation(s)
| | | | - Raghavskandhan Ramachandran
- Medical Sciences Division, Oxford University Hospitals, OX3 9DU Oxford, United Kingdom
- Balliol College, University of Oxford, OX1 3BJ Oxford, United Kingdom
| | - Manini Bharadwaj
- Wexham Park Hospital, Frimley Health NHS Foundation Trust, SL2 4HL Slough, United Kingdom
| | - Natasha Chaudhury
- Wexham Park Hospital, Frimley Health NHS Foundation Trust, SL2 4HL Slough, United Kingdom
| | - Eric Jou
- Medical Sciences Division, Oxford University Hospitals, OX3 9DU Oxford, United Kingdom
- Wexham Park Hospital, Frimley Health NHS Foundation Trust, SL2 4HL Slough, United Kingdom
- Kellogg College, University of Oxford, OX2 6PN Oxford, United Kingdom
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de Graaff P, Berrevoets C, Rӧsch C, Schols HA, Verhoef K, Wichers HJ, Debets R, Govers C. Curdlan, zymosan and a yeast-derived β-glucan reshape tumor-associated macrophages into producers of inflammatory chemo-attractants. Cancer Immunol Immunother 2021; 70:547-561. [PMID: 32860527 PMCID: PMC7889676 DOI: 10.1007/s00262-020-02707-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Accepted: 08/19/2020] [Indexed: 12/14/2022]
Abstract
Anti-cancer T-cell responses are often halted due to the immune-suppressive micro-environment, in part related to tumor-associated macrophages. In the current study, we assessed indigestible β-glucans (oatβG, curdlan, grifolan, schizophyllan, lentinan, yeast whole glucan particles (yWGP), zymosan and two additional yeast-derived β-glucans a and b) for their physicochemical properties as well as their effects on the plasticity of human monocyte-derived macrophages that were polarized with IL-4 to immune-suppressive macrophages. Beta-glucans were LPS/LTA free, and tested for solubility, molecular masses, protein and monosaccharide contents. Curdlan, yeast-b and zymosan re-polarized M(IL-4) macrophages towards an M1-like phenotype, in particular showing enhanced gene expression of CCR7, ICAM1 and CD80, and secretion of TNF-α and IL-6. Notably, differential gene expression, pathway analysis as well as protein expressions demonstrated that M(IL-4) macrophages treated with curdlan, yeast-b or zymosan demonstrated enhanced production of chemo-attractants, such as CCL3, CCL4, and CXCL8, which contribute to recruitment of monocytes and neutrophils. The secretion of chemo-attractants was confirmed when using patient-derived melanoma-infiltrating immune cells. Taken together, the bacterial-derived curdlan as well as the yeast-derived β-glucans yeast-b and zymosan have the unique ability to preferentially skew macrophages towards a chemo-attractant-producing phenotype that may aid in anti-cancer immune responses.
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Affiliation(s)
- Priscilla de Graaff
- Laboratory of Tumor Immunology, Department of Medical Oncology, Erasmus MC-Cancer Institute, Rotterdam, The Netherlands.
- Wageningen Food and Biobased Research, Wageningen UR, Wageningen, The Netherlands.
| | - Cor Berrevoets
- Laboratory of Tumor Immunology, Department of Medical Oncology, Erasmus MC-Cancer Institute, Rotterdam, The Netherlands
| | - Christiane Rӧsch
- Laboratory of Food Chemistry, Wageningen University, Wageningen, The Netherlands
| | - Henk A Schols
- Laboratory of Food Chemistry, Wageningen University, Wageningen, The Netherlands
| | - Kees Verhoef
- Department of General Surgery, Erasmus MC-Cancer Institute, Rotterdam, The Netherlands
| | - Harry J Wichers
- Wageningen Food and Biobased Research, Wageningen UR, Wageningen, The Netherlands
| | - Reno Debets
- Laboratory of Tumor Immunology, Department of Medical Oncology, Erasmus MC-Cancer Institute, Rotterdam, The Netherlands
| | - Coen Govers
- Wageningen Food and Biobased Research, Wageningen UR, Wageningen, The Netherlands.
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Bertolini M, McElwee K, Gilhar A, Bulfone‐Paus S, Paus R. Hair follicle immune privilege and its collapse in alopecia areata. Exp Dermatol 2020; 29:703-725. [DOI: 10.1111/exd.14155] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/18/2020] [Accepted: 07/10/2020] [Indexed: 12/11/2022]
Affiliation(s)
| | - Kevin McElwee
- Monasterium Laboratory Münster Germany
- Centre for Skin Sciences University of Bradford Bradford UK
- Department of Dermatology and Skin Science University of British Columbia Vancouver British Columbia Canada
| | - Amos Gilhar
- Laboratory for Skin Research Rappaport Faculty of Medicine Technion‐Israel Institute of Technology Haifa Israel
| | - Silvia Bulfone‐Paus
- Monasterium Laboratory Münster Germany
- Centre for Dermatology Research University of Manchester and NIHR Manchester Biomedical Research Centre Manchester UK
| | - Ralf Paus
- Monasterium Laboratory Münster Germany
- Centre for Dermatology Research University of Manchester and NIHR Manchester Biomedical Research Centre Manchester UK
- Dr. Philip Frost Department of Dermatology & Cutaneous Surgery University of Miami Miller School of Medicine Miami FL USA
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Balbas-Martinez V, Asin-Prieto E, Parra-Guillen ZP, Troconiz IF. A Quantitative Systems Pharmacology Model for the Key Interleukins Involved in Crohn's Disease. J Pharmacol Exp Ther 2019; 372:299-307. [DOI: 10.1124/jpet.119.260539] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 12/02/2019] [Indexed: 12/12/2022] Open
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Crooke SN, Schimer J, Raji I, Wu B, Oyelere AK, Finn MG. Lung Tissue Delivery of Virus-Like Particles Mediated by Macrolide Antibiotics. Mol Pharm 2019; 16:2947-2955. [DOI: 10.1021/acs.molpharmaceut.9b00180] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Stephen N. Crooke
- School of Chemistry and Biochemistry, ∥School of Biological Sciences, and §Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Jiri Schimer
- School of Chemistry and Biochemistry, ∥School of Biological Sciences, and §Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- Institute of Organic Chemistry and Biochemistry of the CAS, 16610 Prague, Czech Republic
| | - Idris Raji
- School of Chemistry and Biochemistry, ∥School of Biological Sciences, and §Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Bocheng Wu
- School of Chemistry and Biochemistry, ∥School of Biological Sciences, and §Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Adegboyega K. Oyelere
- School of Chemistry and Biochemistry, ∥School of Biological Sciences, and §Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - M. G. Finn
- School of Chemistry and Biochemistry, ∥School of Biological Sciences, and §Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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Arcos J, Sasindran SJ, Moliva JI, Scordo JM, Sidiki S, Guo H, Venigalla P, Kelley HV, Lin G, Diangelo L, Silwani SN, Zhang J, Turner J, Torrelles JB. Mycobacterium tuberculosis cell wall released fragments by the action of the human lung mucosa modulate macrophages to control infection in an IL-10-dependent manner. Mucosal Immunol 2017; 10:1248-1258. [PMID: 28000679 PMCID: PMC5479761 DOI: 10.1038/mi.2016.115] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 10/31/2016] [Indexed: 02/04/2023]
Abstract
Mycobacterium tuberculosis (M.tb), the causative agent of tuberculosis, is a major public health challenge facing the world. During infection, M.tb is deposited in the lung alveolar space where it comes in contact with the lung mucosa, known as alveolar lining fluid (ALF), an environment that M.tb encounters at different stages of the infection and disease. ALF is abundant in homeostatic and antimicrobial hydrolytic enzymes, also known as hydrolases. Here we demonstrate that ALF hydrolases, at their physiological concentrations and upon contact with M.tb, release M.tb cell envelope fragments into the milieu. These released fragments are bioactive, but non-cytotoxic, regulate the function of macrophages, and thus are capable of modulating the immune response contributing to the control of M.tb infection by human macrophages. Specifically, macrophages exposed to fragments derived from the exposure of M.tb to ALF were able to control the infection primarily by increasing phagosome-lysosome fusion and acidification events. This enhanced control was found to be dependent on fragment-induced interleukin-10 (IL-10) production but also involves the STAT3 signaling pathway in an IL-10-independent manner. Collectively our data indicate that M.tb fragments released upon contact with lung mucosa hydrolases participate in the host immune response to M.tb infection through innate immune modulation.
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Affiliation(s)
- Jesus Arcos
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Smitha J. Sasindran
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Juan I. Moliva
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Julia M. Scordo
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Sabeen Sidiki
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Hui Guo
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Poornima Venigalla
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Holden V. Kelley
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Guoxin Lin
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Lauren Diangelo
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Sayeed N. Silwani
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US
| | - Jian Zhang
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US,Center for Microbial Interface Biology, The Ohio State University, Columbus, OH, 43210, US
| | - Joanne Turner
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US,Center for Microbial Interface Biology, The Ohio State University, Columbus, OH, 43210, US
| | - Jordi B. Torrelles
- Department of Microbial Infection and Immunity, The Ohio State University, Columbus, OH, 43210, US,Center for Microbial Interface Biology, The Ohio State University, Columbus, OH, 43210, US,Corresponding author: Jordi B. Torrelles, Department of Microbial Infection and Immunity, College of Medicine, and Center for Microbial Interface Biology, Biomedical Research Tower, Room 708, 460 W. 12th Av., The Ohio State University, Columbus, OH, 43210, US. Phone: 614-292-0777; Fax: 614-292-9616;
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Yamaguchi R, Sakamoto A, Yamamoto T, Narahara S, Sugiuchi H, Hisada A, Katoh T, Yamaguchi Y. Di-(2-ethylhexyl) phthalate suppresses IL-12p40 production by GM-CSF-dependent macrophages via the PPARα/TNFAIP3/TRAF6 axis after lipopolysaccharide stimulation. Hum Exp Toxicol 2017; 37:596-607. [PMID: 28673093 DOI: 10.1177/0960327117714038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Activation of peroxisome proliferator-activated receptor α (PPARα) by di-(2-ethylhexyl) phthalate (DEHP) has an anti-inflammatory effect. This study investigated the potential combined influence of PPARα, tumor necrosis factor α-induced protein 3 (TNFAIP3/A20), and tumor necrosis factor receptor-associated factor 6 (TRAF6) on interleukin (IL)-12p40 production by macrophages exposed to DEHP and stimulated with lipopolysaccharide (LPS). LPS upregulated IL-12p40 expression by granulocyte-macrophage colony-stimulating factor-dependent macrophages (on day 9 of culture), whereas adding DEHP to cultures significantly attenuated the response of IL-12p40 to LPS stimulation. PPARα protein was also reduced by DEHP. Interestingly, transfection of macrophages with small interfering RNA (siRNA) duplexes for PPARα, TNFAIP3/A20, or dual oxidase 2 restored the response of IL-12p40 protein to LPS stimulation in the presence of DEHP. siRNAs for various protein kinase Cs (PKCs) (α, β, γ, or δ) also restored IL-12p40 production by macrophages exposed to LPS and DEHP. While LPS upregulated both IL-12p40 and TNFAIP3/A20 production, adding DEHP to cultures dramatically reduced IL-12p40 and TNFAIP3/A20 levels. Silencing of PKCα reduced TNFAIP3/A20 production, whereas PKCγ siRNA (but not PKCβ or δ siRNA) significantly increased TNFAIP3/A20. TRAF6 was also attenuated by macrophages with DEHP. The PPARα/TNFAIP3/TRAF6 axis may have an important role in the mechanism through which DEHP reduces IL-12p40 production by LPS-stimulated macrophages.
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Affiliation(s)
- R Yamaguchi
- 1 Department of Public Health, Faculty of Life Sciences, Kumamoto University School of Medicine, Kumamoto, Japan.,2 Graduate School of Medical Science, Kumamoto Health Science University, Kumamoto, Japan
| | - A Sakamoto
- 2 Graduate School of Medical Science, Kumamoto Health Science University, Kumamoto, Japan
| | - T Yamamoto
- 2 Graduate School of Medical Science, Kumamoto Health Science University, Kumamoto, Japan
| | - S Narahara
- 2 Graduate School of Medical Science, Kumamoto Health Science University, Kumamoto, Japan
| | - H Sugiuchi
- 2 Graduate School of Medical Science, Kumamoto Health Science University, Kumamoto, Japan
| | - A Hisada
- 1 Department of Public Health, Faculty of Life Sciences, Kumamoto University School of Medicine, Kumamoto, Japan
| | - T Katoh
- 1 Department of Public Health, Faculty of Life Sciences, Kumamoto University School of Medicine, Kumamoto, Japan
| | - Y Yamaguchi
- 2 Graduate School of Medical Science, Kumamoto Health Science University, Kumamoto, Japan
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8
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Polymorphisms of the TNF-α gene interact with plasma fatty acids on inflammatory biomarker profile: a population-based, cross-sectional study in São Paulo, Brazil. Br J Nutr 2017. [PMID: 28633686 DOI: 10.1017/s0007114517001416] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The aim of the present study was to investigate the relationship of four TNF-α SNP with inflammatory biomarkers and plasma fatty acids (FA), and the interaction among them in a population-based, cross-sectional study in São Paulo, Brazil. A total of 281 subjects, aged >19 and <60 years, participated in a cross-sectional, population-based study performed in Brazil. The following SNP spanning the TNF-α gene were genotyped: -238G/A (rs361525), -308G/A (rs1800629), -857C/T (rs1799724) and -1031T/C (rs1799964). In all, eleven plasma inflammatory biomarkers and plasma FA profile were determined. To analyse the interaction between TNF-α SNP and plasma FA, a cluster analysis was performed to stratify individuals based on eleven inflammatory biomarkers into two groups used as outcome: inflammatory (INF) and non-inflammatory clusters. The -238A allele carriers had higher TNF-α (P=0·033), IL-6 (P=0·013), IL-1β (P=0·037), IL-12 (0·048) and IL-10 (P=0·010) than the GG genotype. The -308A allele carriers also had lower levels of plasma palmitoleic acid (P=0·009), oleic acid (P=0·039), total MUFA (P=0·014), stearoyl-CoA desaturase (SCD) activity index-16 (P=0·007), SCD-18 (P=0·020) and higher levels of PUFA (P=0·046) and DHA (P=0·044). Significant interactions modifying the risk of belonging to the INF cluster were observed with inflammatory cluster as outcome between -857C/T and plasma α-linolenic acid (P=0·026), and also between -308G/A and plasma stearic acid (P=0·044) and total SFA (P=0·040). Our study contributes to knowledge on TNF-α SNP and their association with inflammatory biomarker levels, plasma FA and the interaction among them, of particular interest for the Brazilian population.
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Samavedi S, Diaz-Rodriguez P, Erndt-Marino JD, Hahn MS. A Three-Dimensional Chondrocyte-Macrophage Coculture System to Probe Inflammation in Experimental Osteoarthritis. Tissue Eng Part A 2016; 23:101-114. [PMID: 27736317 DOI: 10.1089/ten.tea.2016.0007] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The goal of the present study was to develop a fully three-dimensional (3D) coculture system that would allow for systematic evaluation of the interplay between activated macrophages (AMs) and chondrocytes in osteoarthritic disease progression and treatment. Toward this end, our coculture system was first validated against existing in vitro osteoarthritis models, which have generally cultured healthy normal chondrocytes (NCs)-in two-dimensional (2D) or 3D-with proinflammatory AMs in 2D. In this work, NCs and AMs were both encapsulated within poly(ethylene glycol) diacrylate hydrogels to mimic the native 3D environments of both cell types within the osteoarthritic joint. As with previous studies, increases in matrix metalloproteinases (MMPs) and proinflammatory cytokines associated with the early stages of osteoarthritis were observed during NC-AM coculture, as were decreases in protein-level Aggrecan and collagen II. Thereafter, the coculture system was extended to osteoarthritic chondrocytes (OACs) and AMs to evaluate the potential effects of AMs on pre-existing osteoarthritic phenotypes. OACs in coculture with AMs expressed significantly higher levels of MMP-1, MMP-3, MMP-9, MMP-13, IL-1β, TNF-α, IL-6, IL-8, and IFN-γ compared to OACs in mono-culture, indicating that proinflammatory macrophages may intensify the abnormal matrix degradation and cytokine secretion already associated with OACs. Likewise, AMs cocultured with OACs expressed significantly more IL-1β and VEGF-A compared to AM mono-culture controls, suggesting that OACs may intensify abnormal macrophage activation. Finally, OACs cultured in the presence of nonactivated macrophages produced lower levels of MMP-9 and proinflammatory cytokines IL-1β, TNF-α, and IFN-γ compared to OACs in the OAC-AM system, results that are consistent with anti-inflammatory agents temporarily reducing certain OA symptoms. In summary, the 3D coculture system developed herein captures several key features of inflammatory OA and may prove useful in future screening of therapeutic agents and/or assessment of disease progression mechanisms.
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Affiliation(s)
- Satyavrata Samavedi
- 1 Department of Biomedical Engineering, Rensselaer Polytechnic Institute , Troy, New York.,2 Department of Chemical Engineering, Indian Institute of Technology , Hyderabad, India
| | | | - Joshua D Erndt-Marino
- 1 Department of Biomedical Engineering, Rensselaer Polytechnic Institute , Troy, New York
| | - Mariah S Hahn
- 1 Department of Biomedical Engineering, Rensselaer Polytechnic Institute , Troy, New York
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Reduced Parasite Burden in Children with Falciparum Malaria and Bacteremia Coinfections: Role of Mediators of Inflammation. Mediators Inflamm 2016; 2016:4286576. [PMID: 27418744 PMCID: PMC4933845 DOI: 10.1155/2016/4286576] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 04/28/2016] [Indexed: 01/07/2023] Open
Abstract
Bacteremia and malaria coinfection is a common and life-threatening condition in children residing in sub-Saharan Africa. We previously showed that coinfection with Gram negative (G[-]) enteric Bacilli and Plasmodium falciparum (Pf[+]) was associated with reduced high-density parasitemia (HDP, >10,000 parasites/μL), enhanced respiratory distress, and severe anemia. Since inflammatory mediators are largely unexplored in such coinfections, circulating cytokines were determined in four groups of children (n = 206, aged <3 yrs): healthy; Pf[+] alone; G[-] coinfected; and G[+] coinfected. Staphylococcus aureus and non-Typhi Salmonella were the most frequently isolated G[+] and G[-] organisms, respectively. Coinfected children, particularly those with G[-] pathogens, had lower parasite burden (peripheral and geometric mean parasitemia and HDP). In addition, both coinfected groups had increased IL-4, IL-5, IL-7, IL-12, IL-15, IL-17, IFN-γ, and IFN-α and decreased TNF-α relative to malaria alone. Children with G[-] coinfection had higher IL-1β and IL-1Ra and lower IL-10 than the Pf[+] group and higher IFN-γ than the G[+] group. To determine how the immune response to malaria regulates parasitemia, cytokine production was investigated with a multiple mediation model. Cytokines with the greatest mediational impact on parasitemia were IL-4, IL-10, IL-12, and IFN-γ. Results here suggest that enhanced immune activation, especially in G[-] coinfected children, acts to reduce malaria parasite burden.
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Innate myeloid cell TNFR1 mediates first line defence against primary Mycobacterium tuberculosis infection. Sci Rep 2016; 6:22454. [PMID: 26931771 PMCID: PMC4773807 DOI: 10.1038/srep22454] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 02/15/2016] [Indexed: 12/11/2022] Open
Abstract
TNF is crucial for controlling Mycobacterium tuberculosis infection and
understanding how will help immunomodulating the host response. Here we assessed the
contribution of TNFR1 pathway from innate myeloid versus T cells. We first
established the prominent role of TNFR1 in haematopoietic cells for controlling
M. tuberculosis in TNFR1 KO chimera mice. Further, absence of TNFR1
specifically on myeloid cells (M-TNFR1 KO) recapitulated the uncontrolled M.
tuberculosis infection seen in fully TNFR1 deficient mice, with increased
bacterial burden, exacerbated lung inflammation, and rapid death. Pulmonary IL-12p40
over-expression was attributed to a prominent CD11b+
Gr1high cell population in infected M-TNFR1 KO mice. By contrast,
absence of TNFR1 on T-cells did not compromise the control of M. tuberculosis
infection over 6-months. Thus, the protective TNF/TNFR1 pathway essential for
controlling primary M. tuberculosis infection depends on innate macrophage
and neutrophil myeloid cells, while TNFR1 pathway in T cells is dispensable.
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12
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Welsby I, Goriely S. Regulation of Interleukin-23 Expression in Health and Disease. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 941:167-189. [DOI: 10.1007/978-94-024-0921-5_8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Ashjaei K, Bublin M, Smole U, Lengger N, Hafner C, Breiteneder H, Wagner S, Hoffmann-Sommergruber K. Differential T-helper cell polarization after allergen-specific stimulation of autologous dendritic cells in polysensitized allergic patients. Int Arch Allergy Immunol 2015; 166:97-106. [PMID: 25792188 PMCID: PMC4739505 DOI: 10.1159/000375405] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 01/21/2015] [Indexed: 12/17/2022] Open
Abstract
Background Dendritic cells (DCs) play an important role in the induction and regulation of adaptive immune responses by polarizing T-helper (Th) cells. In allergic disease this response is dominated by Th2 cells. It is still unclear whether the activation of Th cells by DCs in atopic individuals is allergen specific. Methods Monocyte-derived DCs (MoDCs) obtained from polysensitized patients were stimulated with purified Bet v 1, Phl p 5 and Act d 10, and the surface marker expression was analysed. Proliferation and cytokine profiles of autologous naïve CD4+ T cells co-cultured with allergen-pulsed MoDCs were assessed. Results The addition of either Bet v 1 or Phl p 5 did not further increase the expression of surface markers from matured MoDCs in all study groups. In co-cultures, autologous naïve CD4+ T cells proliferated when DCs obtained from individuals allergic to birch and grass pollen were stimulated with Bet v 1 and Phl p 5, respectively. In the co-culture supernatants, significantly increased levels of IL-5 and IL-13 were detected. This effect correlated with the sensitization background and was absent when applying an unspecific allergen, Act d 10. The levels of IL-10 in supernatants of MoDCs and the levels of IL-10 and IFN-γ in supernatants of T cells remained unchanged upon stimulation with allergens. Conclusions In this study we observed that allergen-specific stimulation of MoDCs induces T-cell proliferation and upregulation of Th2-type cytokines. Interestingly, this Th2 polarization was only observed in cells stimulated with the allergen to which the patients were sensitized.
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Affiliation(s)
- Kazem Ashjaei
- Department of Pathophysiology and Allergy Research, Medical University of Vienna, Vienna, Austria
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Roberts KK, Hill TE, Davis MN, Holbrook MR, Freiberg AN. Cytokine response in mouse bone marrow derived macrophages after infection with pathogenic and non-pathogenic Rift Valley fever virus. J Gen Virol 2015; 96:1651-1663. [PMID: 25759029 DOI: 10.1099/vir.0.000119] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Rift Valley fever virus (RVFV) is the most pathogenic member of the genus Phlebovirus within the family Bunyaviridae, and can cause severe disease in humans and livestock. Until recently, limited information has been published on the cellular host response elicited by RVFV, particularly in macrophages and dendritic cells, which play critical roles in stimulating adaptive and innate immune responses to viral infection. In an effort to define the initial response of host immunomodulatory cells to infection, primary mouse bone marrow derived macrophages (BMDM) were infected with the pathogenic RVFV strain ZH501, or attenuated strains MP-12 or MP-12 based Clone13 type (rMP12-C13 type), and cytokine secretion profiles examined. The secretion of T helper (Th)1-associated antiviral cytokines, chemokines and various interleukins increased rapidly after infection with the attenuated rMP12-C13 type RVFV, which lacks a functional NSs virulence gene. In comparison, infection with live-attenuated MP-12 encoding a functional NSs gene appeared to cause a delayed immune response, while pathogenic ZH501 ablates the immune response almost entirely. These data demonstrate that NSs can inhibit components of the BMDM antiviral response and supports previous work indicating that NSs can specifically regulate the type I interferon response in macrophages. Furthermore, our data demonstrate that genetic differences between ZH501 and MP-12 reduce the ability of MP-12 to inhibit antiviral signalling and subsequently reduce virulence in BMDM, demonstrating that viral components other than NSs play a critical role in regulating the host response to RVFV infection.
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Affiliation(s)
- Kimberly K Roberts
- 1Department of Pathology, University of Texas Medical Branch, Galveston, TX, USA
| | - Terence E Hill
- 1Department of Pathology, University of Texas Medical Branch, Galveston, TX, USA
| | - Melissa N Davis
- 2Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, USA
| | - Michael R Holbrook
- 6Integrated Research Facility, National Institute of Allergy and Infectious Disease, National Institutes of Health, Frederick, MD, USA.,5Center for Tropical Diseases, University of Texas Medical Branch, Galveston, TX, USA.,1Department of Pathology, University of Texas Medical Branch, Galveston, TX, USA.,2Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, USA.,4Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, TX, USA.,3Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX, USA
| | - Alexander N Freiberg
- 3Galveston National Laboratory, University of Texas Medical Branch, Galveston, TX, USA.,4Institute for Human Infections and Immunity, University of Texas Medical Branch, Galveston, TX, USA.,1Department of Pathology, University of Texas Medical Branch, Galveston, TX, USA.,5Center for Tropical Diseases, University of Texas Medical Branch, Galveston, TX, USA
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N-[3-(aminomethyl)benzyl]acetamidine (1400 W) as a potential immunomodulatory agent. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2014; 2014:491214. [PMID: 24995119 PMCID: PMC4068048 DOI: 10.1155/2014/491214] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 05/18/2014] [Accepted: 05/19/2014] [Indexed: 12/29/2022]
Abstract
This study was designed to investigate the relationship between NO, IL-12, and TNF-α production by J774A.1 macrophages activated with LPS and IFN-γ in the presence of N-[3-(aminomethyl)benzyl]acetamidine (1400 W). 1400 W is a novel, highly selective inhibitor of inducible nitric oxide synthase (iNOS). We compared the obtained data with the effect of NG-monomethyl-L-arginine (L-NMMA) (a nonselective NOS inhibitor) and L-NG-(1-iminoethyl)lysine (L-NIL) (a relatively selective inhibitor of iNOS activity) on cells in this model. To investigate the involvement of an exogenous NO on IL-12 and TNF-α production we used NO donor—S-nitrosocaptopril (S-NO-Cap). The most potent inhibitor of NO generation was 1400 W. This compound also markedly increased IL-12 p40 secretion and decreased TNF-α release. L-NIL suppressed both NO and TNF-α production, but it did not change IL-12 p40 synthesis. The effect of L-NMMA on NO generation was weaker than other inhibitors. Moreover, it decreased TNF-α secretion slightly but not significantly. IL-12 p40 production by stimulated cells was inhibited by S-NO-Cap in a dose dependent manner, but no effect on TNF-α release was observed. The potency and selectivity of 1400 W as an inhibitor of iNOS and cytokine release modifier are encouraging for therapeutic use.
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16
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Ando-Suguimoto ES, da Silva MP, Kawamoto D, Chen C, DiRienzo JM, Mayer MPA. The cytolethal distending toxin of Aggregatibacter actinomycetemcomitans inhibits macrophage phagocytosis and subverts cytokine production. Cytokine 2014; 66:46-53. [PMID: 24548424 DOI: 10.1016/j.cyto.2013.12.014] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 11/19/2013] [Accepted: 12/24/2013] [Indexed: 02/06/2023]
Abstract
Aggregatibacter actinomycetemcomitans is an important periodontal pathogen that can participate in periodontitis and other non-oral infections. The cytolethal distending toxin (Cdt) is among the virulence factors produced by this bacterium. The Cdt is also secreted by several mucosa-associated Gram-negative pathogens and may play a role in perpetuating the infection by modulating the immune response. Although the toxin targets a wide range of eukaryotic cell types little is known about its activity on macrophages which play a key part in alerting the rest of the immune system to the presence of pathogens and their virulence factors. In view of this, we tested the hypothesis that the A. actinomycetemcomitans Cdt (AaCdt) disrupts macrophage function by inhibiting phagocytic activity as well as affecting the production of cytokines. Murine macrophages were co-cultured with either wild-type A. actinomycetemcomitans or a Cdt(-) mutant. Viable counts and qPCR showed that phagocytosis of the wild-type strain was significantly reduced relative to that of the Cdt(-) mutant. Addition of recombinant Aa(r)Cdt to co-cultures along with the Cdt(-) mutant diminished the phagocytic activity similar to that observed with the wild type strain. High concentrations of Aa(r)Cdt resulted in decreased phagocytosis of fluorescent bioparticles. Nitric oxide production was modulated by the presence of Cdt and the levels of IL-1β, IL-12 and IL-10 were increased. Production of TNF-α did not differ in the co-culture assays but was increased by the presence of Aa(r)Cdt. These data suggest that the Cdt may modulate macrophage function in A. actinomycetemcomitans infected sites by impairing phagocytosis and modifying the pro-inflammatory/anti-inflammatory cytokine balance.
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Affiliation(s)
| | - Maike Paulino da Silva
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Dione Kawamoto
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Casey Chen
- Division of Periodontology, Diagnostic Sciences and Dental Hygiene, Ostrow School of Dentistry of University of Southern California, USA
| | - Joseph M DiRienzo
- Department of Microbiology, School of Dental Medicine, University of Pennsylvania, PA, USA
| | - Marcia Pinto Alves Mayer
- Department of Microbiology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
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17
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Gu L, Ning H, Qian X, Huang Q, Hou R, Almourani R, Fu M, Blackshear PJ, Liu J. Suppression of IL-12 production by tristetraprolin through blocking NF-kcyB nuclear translocation. THE JOURNAL OF IMMUNOLOGY 2013; 191:3922-30. [PMID: 23997224 DOI: 10.4049/jimmunol.1300126] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Tristetraprolin (TTP), an mRNA-binding protein, plays a significant role in regulating the expression of adenylate-uridylate-rich elements containing mRNAs. Mice deficient of TTP (TTP(-/-)) develop a systemic autoimmune inflammatory syndrome characterized by cachexia, conjunctivitis, and dermatitis. IL-12 plays a crucial role in immune defense against infectious and malignant diseases. In this study, we found increased production of IL-12 during endotoxic shock and enhanced Th1 cells in TTP knockout mice. The levels of IL-12 p70 and p40 protein as well as p40 and p35 mRNA were also increased in activated macrophages deficient of TTP. In line with these findings, overexpression of TTP suppressed IL-12 p35 and p40 expression at the mRNA and promoter level, whereas it surprisingly had little effects on their mRNA stability. Our data showed that the inhibitory effects of TTP on p35 gene transcription were completely rescued by overexpression of NF-кB p65 and c-Rel but not by the p50 in activated macrophages. Our data further indicated that TTP acquired its inhibition on IL-12 expression through blocking nuclear translocation of NF-кB p65 and c-Rel while enhancing p50 upon stimulation. In summary, our study reveals a novel pathway through which TTP suppresses IL-12 production in macrophages, resulting in suppression of Th1 cell differentiation. This study may provide us with therapeutic targets for treatment of inflammatory and autoimmune disorders.
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Affiliation(s)
- Ling Gu
- Division of Infectious Diseases, Allergy and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, St. Louis, MO 63104
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18
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Perez-Aso M, Feig JL, Mediero A, Aránzazu M, Cronstein BN. Adenosine A2A receptor and TNF-α regulate the circadian machinery of the human monocytic THP-1 cells. Inflammation 2013; 36:152-62. [PMID: 22923002 PMCID: PMC3553238 DOI: 10.1007/s10753-012-9530-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Morning stiffness and increased symptoms of inflammatory arthritis are among the most common manifestations of rheumatoid arthritis (RA). Tumor necrosis alpha (TNF-α), an important mediator of inflammation in RA, regulates the circadian expression of clock proteins, and adenosine A(2A) receptors (A(2A)R) mediate many of the anti-inflammatory and antirheumatic actions of methotrexate, the cornerstone drug in the treatment of RA. We found that A(2A)R activation and TNF-α activated the clock core loop of the human monocytic THP-1 cell line. We further observed that interleukin (IL)-10, but not IL-12, mRNA expression fluctuates in a circadian fashion and that TNF-α and A(2A)R stimulation combined increased IL-10 expression. Interestingly, TNF-α, but not CGS21680, dramatically inhibited IL-12 mRNA expression. The demonstration that A(2A)R and TNF-α regulate the intrinsic circadian clock in immune cells provides an explanation for both the pathologic changes in circadian rhythms in RA and for the adverse circadian effects of methotrexate, such as fatigue.
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Affiliation(s)
- Miguel Perez-Aso
- Division of Translational Medicine, Department of Medicine, New York University School of Medicine, New York, NY 10016, USA.
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19
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Melo GD, Seraguci TF, Schweigert A, Silva JES, Grano FG, Peiró JR, Lima VMF, Machado GF. Pro-inflammatory cytokines predominate in the brains of dogs with visceral leishmaniasis: a natural model of neuroinflammation during systemic parasitic infection. Vet Parasitol 2012. [PMID: 23207017 DOI: 10.1016/j.vetpar.2012.11.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Visceral leishmaniasis is a multisystemic zoonotic disease that can manifest with several symptoms, including neurological disorders. To investigate the pathogenesis of brain alterations occurring during visceral leishmaniasis infection, the expression of the cytokines IL-1β, IL-6, IL-10, IL-12p40, IFN-γ, TGF-β and TNF-α and their correlations with peripheral parasite load were evaluated in the brains of dogs naturally infected with Leishmania infantum. IL-1β, IFN-γ and TNF-α were noticeably up-regulated, and IL-10, TGF-β and IL-12p40 were down-regulated in the brains of infected dogs. Expression levels did not correlate with parasite load suggestive that the brain alterations are due to the host's immune response regardless of the phase of the disease. These data indicate the presence of a pro-inflammatory status in the nervous milieu of dogs with visceral leishmaniasis especially because IL-1β and TNF-α are considered key factors for the initiation, maintenance and persistence of inflammation.
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Affiliation(s)
- Guilherme D Melo
- UNESP - Univ Estadual Paulista, College of Veterinary Medicine, Araçatuba, São Paulo, Brazil
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20
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Williams RO. What Have We Learned about the Pathogenesis of Rheumatoid Arthritis from TNF-Targeted Therapy? ACTA ACUST UNITED AC 2012. [DOI: 10.5402/2012/652739] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Studies of cytokine regulation in rheumatoid arthritis led to the development of TNFα inhibitors which are now used for a number of indications, including rheumatoid arthritis, inflammatory bowel disease, psoriasis, psoriatic arthritis, and ankylosing spondylitis. The widespread use of biologics in the clinic offers unique opportunities for probing disease pathogenesis and this paper provides an overview of rheumatoid arthritis, with a particular emphasis on the impact of anti-TNFα therapy on pathogenetic mechanisms. An overview is also provided on the most commonly used animal models that mimic RA, including adjuvant-induced arthritis, collagen-induced arthritis, TNFα-transgenic mice, and the K/BxN and SKG models. These models have led to significant discoveries relating to the importance of pro-inflammatory cytokines in the pathogenesis of rheumatoid arthritis, resulting from disregulation of the normally finely tuned balance of pro- and anti-inflammatory cytokine signalling. In addition, experimental evidence is discussed suggesting how genetic and environmental factors can contribute to disease susceptibility. The role of effector and regulatory T cells is discussed in the light of the relatively disappointing therapeutic effects of T cell modifying agents such as anti-CD4 antibody and cyclosporin. It is concluded that comprehensive analyses of mechanisms of action of biologics and other drugs entering the clinic will be essential to optimise therapy, with the ultimate aim of providing a cure.
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Affiliation(s)
- Richard O. Williams
- Kennedy Institute of Rheumatology, University of Oxford, 65 Aspenlea Road, London W6 8LH, UK
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21
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Suzuki J, Hamada E, Shodai T, Kamoshida G, Kudo S, Itoh S, Koike J, Nagata K, Irimura T, Tsuji T. Cytokine secretion from human monocytes potentiated by P-selectin-mediated cell adhesion. Int Arch Allergy Immunol 2012; 160:152-60. [PMID: 23018521 DOI: 10.1159/000339857] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Accepted: 05/30/2012] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND/AIM P-selectin is a carbohydrate-recognizing cell adhesion molecule expressed on activated platelets and endothelial cells. It plays a crucial role in the recruitment of leukocytes to inflammatory and hemorrhagic sites. Cell adhesion mediated by P-selectin induces leukocyte activation, such as the generation of reactive oxygen species and the expression of blood coagulation factors. We assessed how P-selectin-mediated cell adhesion affects cytokine secretion from monocytes. METHODS Human peripheral blood monocytes were cultured in a plate that had been coated with P-selectin purified from human platelets, and cytokines released in the culture supernatant from monocytes were determined by ELISA. RESULTS The secretion of tumor necrosis factor (TNF)-α, interleukin (IL)-1β, IL-6, IL-8, IL-12 and macrophage inflammatory protein-1β increased 3- to 10-fold in response to P-selectin compared with unstimulated monocytes. We next examined the effects of cytokine treatment of monocytes on their susceptibility to P-selectin. The secretion of TNF-α from monocytes in response to P-selectin was increased when monocytes were preincubated with granulocyte/macrophage colony-stimulating factor, monocyte chemotactic protein-1 or interferon-γ (IFN-γ); IFN-γ was the most effective in potentiating TNF-α secretion from monocytes. CONCLUSION These results suggest that the interaction of monocytes with P-selectin plays an important role not only in their trafficking but also in the regulation of cytokine production by these cells.
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Affiliation(s)
- Junsuke Suzuki
- Department of Microbiology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan
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22
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Liu Y, Zhang Y, Fu J, Tan W. Inflammation-Related Gene Expression Profiles of Endocervical Polyps. J Interferon Cytokine Res 2012; 32:191-7. [PMID: 22468800 DOI: 10.1089/jir.2011.0066] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Yinglan Liu
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yaling Zhang
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Jianhuan Fu
- Department of Obstetrics and Gynecology, the First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Wenhua Tan
- Department of Obstetrics and Gynecology, the Second Affiliated Hospital of Harbin Medical University, Harbin, China
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Kruglov AA, Lampropoulou V, Fillatreau S, Nedospasov SA. Pathogenic and protective functions of TNF in neuroinflammation are defined by its expression in T lymphocytes and myeloid cells. THE JOURNAL OF IMMUNOLOGY 2011; 187:5660-70. [PMID: 22058414 DOI: 10.4049/jimmunol.1100663] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
TNF displays pathogenic activities in many autoimmune disorders. However, anti-TNF therapy in multiple sclerosis patients failed because of poorly understood reasons. We used a panel of gene-targeted mice that allowed cell-type specific ablation of TNF to uncover pathogenic and protective contributions of this cytokine during autoimmune disease of the CNS. T cells and myeloid cells were found to be critical cellular sources of TNF during experimental autoimmune encephalomyelitis (EAE). TNF produced by myeloid cells accelerated the onset of disease by regulation of chemokine expression in the CNS, driving the recruitment of inflammatory cells into the target organ. TNF produced by T cells exacerbated the damage to the CNS during EAE by regulating infiltration of inflammatory myeloid cells into the CNS. In secondary lymphoid organs, TNF expressed by myeloid cells and T cells acted in synergy to dampen IL-12p40 and IL-6 production by APCs, subsequently inhibiting the development of encephalitogenic T cell responses of Th1 and Th17 types. This dual role of TNF during EAE (protective in lymphoid organs and pathogenic in CNS) suggests that global TNF blockade might be inefficient in multiple sclerosis patients because augmented autoreactive T cell development in lymphoid tissues might overwhelm the beneficial effects resulting from TNF inhibition in the CNS.
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Affiliation(s)
- Andrey A Kruglov
- German Rheumatism Research Center, a Leibniz Institute, Berlin 10117, Germany.
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24
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Dissecting the role of dendritic cells in simian immunodeficiency virus infection and AIDS. Immunol Res 2011; 50:228-34. [PMID: 21717075 DOI: 10.1007/s12026-011-8220-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Human immunodeficiency virus (HIV) infection is associated with the loss of the two principal types of dendritic cell (DC), myeloid DC (mDC) and plasmacytoid DC (pDC), but the mechanism of this loss and its relationship to AIDS pathogenesis remain ill-defined. The nonhuman primate is a powerful model to dissect this response for several reasons. Both DC subsets have been well characterized in nonhuman primates and shown to have strikingly similar phenotypic and functional characteristics to their counterparts in the human. Moreover, decline of mDC and pDC occurs in rhesus macaques with end-stage simian immunodeficiency virus (SIV) infection, the model of HIV infection in humans. In this brief review, we discuss what is known about DC subsets in pathogenic and nonpathogenic nonhuman primate models of HIV infection and highlight the advances and controversies that currently exist in the field.
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25
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McDonald SM, Matheson LA, McBane JE, Kuraitis D, Suuronen E, Santerre JP, Labow RS. Use of monocyte/endothelial cell co-cultures (in vitro) and a subcutaneous implant mouse model (in vivo) to evaluate a degradable polar hydrophobic ionic polyurethane. J Cell Biochem 2011; 112:3762-72. [DOI: 10.1002/jcb.23307] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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26
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Bostanci N, Akgül B, Tsakanika V, Allaker RP, Hughes FJ, McKay IJ. Effects of low-dose doxycycline on cytokine secretion in human monocytes stimulated with Aggregatibacter actinomycetemcomitans. Cytokine 2011; 56:656-61. [PMID: 21962932 DOI: 10.1016/j.cyto.2011.08.039] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2011] [Revised: 07/22/2011] [Accepted: 08/26/2011] [Indexed: 10/17/2022]
Abstract
Doxycycline is an antibiotic used in the treatment of a variety of inflammatory conditions, including periodontitis. Apart from its antimicrobial properties, this drug also has independent anti-inflammatory effects at sub-antimicrobial doses. The present study aimed to investigate the effects of low-doses of doxycycline (LDD) on cytokine production by human monocytic cells challenged with the periodontal pathogen Aggregatibacter actinomycetemcomitans, for up to 6 h. The simultaneous regulation of 12 cytokines were measured by a Human Cytokine Array Kit. To validate the array findings, selected cytokines were also measured by enzyme-linked immunosorbant assay (ELISA). A. actinomycetemcomitans stimulated the production of tumor necrosis factor (TNF)-α, interleukin (IL)-1α, IL-1β, IL-6 and IL-8 by the cells after 6 h of challenge, and doxycycline significantly inhibited this effect. The kinetics of this regulation demonstrated an early (within 2 h) and significant (P<0.05) inhibition of pro-inflammatory cytokines, with a mild (0.5-fold) up-regulation of the anti-inflammatory cytokine IL-10. The results indicate that LDD acts as an anti-inflammatory agent in human monocytic cells stimulated with A. actinomycetemcomitans. This model provides clear evidence that some of the clinically proven benefits of LDD may be related to its ability to regulate inflammatory mediator release by monocytic cells. This property may contribute to the clinically proven benefits of this antibiotic as an adjunctive treatment for periodontitis.
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Affiliation(s)
- N Bostanci
- Oral Translational Research, Institute of Oral Biology, Center of Dental Medicine, University of Zurich, Zurich, Switzerland.
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27
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Hirata N, Yanagawa Y, Ogura H, Satoh M, Noguchi M, Matsumoto M, Togashi H, Onoé K, Iwabuchi K. The role of tumor necrosis factor-α for interleukin-10 production by murine dendritic cells. Cell Immunol 2011; 266:165-71. [DOI: 10.1016/j.cellimm.2010.09.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2010] [Revised: 09/30/2010] [Accepted: 09/30/2010] [Indexed: 02/06/2023]
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28
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Oliveira RAS, Azevedo-Ximenes E, Luzzati R, Garcia RC. The hydroxy-naphthoquinone lapachol arrests mycobacterial growth and immunomodulates host macrophages. Int Immunopharmacol 2010; 10:1463-73. [PMID: 20837170 DOI: 10.1016/j.intimp.2010.08.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2010] [Revised: 08/25/2010] [Accepted: 08/27/2010] [Indexed: 12/31/2022]
Abstract
The present study reports the anti-mycobacterial activity of 2-hydroxy-3-(3-methyl-2-butenyl)-1,4-naphthoquinone (lapachol) as well as its influence on macrophage functions. Lapachol (L) did not induce apoptosis/necrosis of THP-1 macrophages at ≤32 μg/mL. Mycobacterium avium liquid growth was arrested by ≥32 μg/mL and intra-macrophage proliferation by ≥16 μg/mL lapachol. The main immuno-modulatory effects of lapachol observed were an up-regulation of interferon-γ-receptor 1 (IFN-γR1) and major histocompatibility complex class II (MHCII) surface expression, and a marked inhibition of IL-10 secretion. Lapachol did not affect resting, IFN-γ- or toll-like receptor 2 (TLR2)-induced levels of oxygen and nitrogen metabolism key proteins nor the TLR2-mediated secretion of TNF-α, nor induced either oxidative or endoplasmic reticulum (ER) stress. Lapachol inhibited the surface expression of the co-stimulatory molecule CD86 but not that of CD80 and CD83. The results obtained indicate that the substituted naphthoquinone lapachol exhibits an anti-mycobacterial activity that is more efficient intra- than extra-cellularly, and exerts immuno-modulatory effects some of which may enhance the capacity of the host cell to control mycobacterial growth. The immune-modulatory action of lapachol could contribute to its more efficient intra-macrophage anti-mycobacterial activity.
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Affiliation(s)
- Renato A S Oliveira
- International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
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29
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Dillon SM, Rogers LM, Howe R, Hostetler LA, Buhrman J, McCarter MD, Wilson CC. Human intestinal lamina propria CD1c+ dendritic cells display an activated phenotype at steady state and produce IL-23 in response to TLR7/8 stimulation. THE JOURNAL OF IMMUNOLOGY 2010; 184:6612-21. [PMID: 20483758 DOI: 10.4049/jimmunol.1000041] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Intestinal dendritic cells (DCs) play key roles in mediating tolerance to commensal flora and inflammatory responses against mucosal pathogens. The mechanisms by which intestinal "conditioning" influences human DC responses to microbial stimuli remain poorly understood. Infections with viruses, such as HIV-1, that target mucosal tissue result in intestinal epithelial barrier breakdown and increased translocation of commensal bacteria into the lamina propria (LP). It is unclear whether innate LP DC responses to concurrent viral and bacterial stimuli influence mucosal HIV-1 pathogenesis. In this study, direct ex vivo phenotype and in vitro constitutive cytokine production of CD1c+ DCs in human intestinal LP were compared with those in peripheral blood (PB). To evaluate innate responses to viral and bacterial stimuli, intracellular cytokine production by LP and PB DCs following stimulation with ligands for TLRs 2, 4, 5, and 7/8 was evaluated. At steady state, LP CD1c+ DCs expressed higher levels of activation markers (CD40, CD83, CD86, HLA-DR, and CCR7) than did PB CD1c+ DCs, and higher frequencies of LP CD1c+ DCs constitutively produced IL-6 and -10 and TNF-alpha. LP DCs had blunted cytokine responses to TLR4 ligand and TLR5 ligand stimulation relative to PB DCs, yet similarly produced IL-10 in response to TLR2 ligand. Only synthetic TLR7/8 ligand, a mimic of viral ssRNA, induced IL-23 production by LP CD1c+ DCs, and this proinflammatory cytokine response was synergistically enhanced following combined TLR7/8 and TLR4 stimulation. These findings highlight a potential mechanism by which viruses like HIV-1 may subvert homeostatic mechanisms and induce inflammation in the intestinal mucosa.
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Affiliation(s)
- Stephanie M Dillon
- Department of Medicine, University of Colorado Denver, Aurora, CO 80045, USA
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30
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Ghadimi D, de Vrese M, Heller KJ, Schrezenmeir J. Lactic acid bacteria enhance autophagic ability of mononuclear phagocytes by increasing Th1 autophagy-promoting cytokine (IFN-gamma) and nitric oxide (NO) levels and reducing Th2 autophagy-restraining cytokines (IL-4 and IL-13) in response to Mycobacterium tuberculosis antigen. Int Immunopharmacol 2010; 10:694-706. [PMID: 20381647 DOI: 10.1016/j.intimp.2010.03.014] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2010] [Revised: 03/08/2010] [Accepted: 03/30/2010] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND OBJECTIVES Control of the intracellular Mycobacterium tuberculosis (Mtb), mainly requires an appropriate ratio of Th1/Th2 cytokines to induce autophagy, a physiologically, and immunologically regulated process that has recently been highlighted as an innate defense mechanism against intracellular pathogens. Current vaccines/adjuvants induce both protective Th1 autophagy-promoting cytokines, such as IFN-gamma, and immunosuppressive Th2 autophagy-restraining cytokines, such as IL-4 and IL-13. TB infection itself is also characterized by relatively high levels of Th2 cytokines, which down-regulate Th1 responses and subsequently subvert adequate protective immunity, and a low ratio of IFN-gamma/IL-4. Therefore, there is a need for a safe and non-toxic vaccine/adjuvant that will induce Th1 autophagy-promoting cytokine (IFN-gamma) secretion and suppress the pre-existing subversive Th2 autophagy-restraining cytokines (IL-4 and IL-13). As lactic acid bacteria (LAB) belonging to the natural intestinal microflora and their components have been shown to shift immune responses against other antigens from Th2-type cytokines toward Th1-type cytokines like IFN-gamma, we investigated whether LAB can improve the polarization of Th1/Th2 cytokines and autophagic ability of mononuclear phagocytes in response to Mtb antigen. METHODS Peripheral blood mononuclear cells (PBMCs), which are a part of the mononuclear phagocyte system and source of crucial macrophage activators in the in vivo situation, and human monocyte-derived macrophages (HMDMs) were treated with Mtb antigen in the presence or absence of two strains of LAB, L. rhammosus GG (LGG) and Bifidobacterium bifidum MF 20/5 (B.b). PBMCs cell culture supernatants were analyzed for the production of the autophagy-promoting factors IFN-gamma, and nitric oxide (NO) and the autophagy-restraining cytokines IL-4 and IL-13, using ELISA and Griess assays to detect the production of cytokines and NO, respectively. In HMDMs, expression of microtubule-associated protein 1 light chain 3 (LC3-I), membrane-associated (LC3-II) forms of LC3 protein and Beclin-1, as hallmarks of autophagy, were assessed using Western blot to detect the autophagy markers. The secreted interleukin 6 (IL-6), interleukin 10 (IL-10), interleukin (IL)-12 and transformig growth factor-beta (TGF-beta), and chemokine (C-C motif) ligand 18 (CCL18) from HMDMs were determined by ELISA. Also, reverse transcription polymerase chain reaction (RT-PCR) analysis was used to assess the mRNA expressions of CCL18 in HMDMs. RESULTS Treatment of PBMCs with either Mtb antigen or with LAB significantly increased the IFN-gamma and NO production. Combination of Mtb antigen and LAB led to synergistic increase in IFN-gamma, and an additive increase in NO. Treatment with Mtb antigen alone significantly increased the IL-4 and IL-13 production. LAB significantly decreased IL-4 and IL-13 secretion in both unstimulated and Mtb antigen-stimulated PBMCs. The IFN-gamma/IL-4+IL-13 ratio was enhanced, indicating Th1/Th2 polarization. Treatment of macrophages with combined use of Mtb antigen and LAB led to an additive increase in Beclin-1, LC3-II expression, as well as in synergistic increase in IL-12 production. Treatment of macrophages with combined use of Mtb antigen and LAB led to a decrease in IL-6, IL-10, and CCL18 secretion. LAB inhibited the secretion of TGF-beta by Mtb-stimulated macrophages, however not significantly. Treatment of macrophages with combined use of Mtb antigen and LAB led to a decrease in CCL18 mRNA expression. CONCLUSION Our study implies that LAB may reinforce the response of the mononuclear phagocytes to Mtb antigen by inducing production of the autophagy-promoting factors IFN-gamma and NO, while decreasing the Th2 autophagy-restraining cytokines IL-4 and IL-13. Hence, combination of Mtb antigen and LAB may perhaps be safer in more efficacious TB vaccine formulation.
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Affiliation(s)
- Darab Ghadimi
- Department of Physiology and Biochemistry of Nutrition, Max Rubner-Institut, Hermann-Weigmann-Str 1, D-24103 Kiel, Germany.
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Lin PL, Myers A, Smith L, Bigbee C, Bigbee M, Fuhrman C, Grieser H, Chiosea I, Voitenek NN, Capuano SV, Klein E, Flynn JL. Tumor necrosis factor neutralization results in disseminated disease in acute and latent Mycobacterium tuberculosis infection with normal granuloma structure in a cynomolgus macaque model. ACTA ACUST UNITED AC 2010; 62:340-50. [PMID: 20112395 DOI: 10.1002/art.27271] [Citation(s) in RCA: 144] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVE An increased risk of tuberculosis has been documented in humans treated with tumor necrosis factor alpha (TNFalpha)-neutralizing agents. In murine models, impaired signaling by TNF causes exacerbation of both acute and chronic infection associated with aberrant granuloma formation and maintenance. This study was undertaken to investigate immune modulation in the setting of TNF neutralization in primary and latent tuberculosis in a non-human primate model. METHODS Cynomolgus macaques 4 years of age or older were infected with Mycobacterium tuberculosis and subjected to clinical, microbiologic, immunologic, and radiographic examinations. Monkeys were classified as having active or latent disease 6-8 months after infection, based on clinical criteria. Monkeys used in acute infection studies were randomized to receive either adalimumab (prior to and during infection) or no treatment. Monkeys with latent infection that were randomized to receive TNF-neutralizing agent were given either an inhibitor of soluble TNF, recombinant methionyl human soluble TNF receptor I (p55-TNFRI), or adalimumab. Control monkeys with latent infection were given no treatment or saline. Data from previously studied monkeys with active or latent disease were also used for comparison. RESULTS Administration of TNF-neutralizing agents prior to M tuberculosis infection resulted in fulminant and disseminated disease by 8 weeks after infection. Neutralization of TNF in latently infected cynomolgus macaques caused reactivation in a majority of animals as determined by gross pathologic examination and bacterial burden. A spectrum of dissemination was noted, including extrapulmonary disease. Surprisingly, monkeys that developed primary and reactivation tuberculosis after TNF neutralization had similar granuloma structure and composition to that of control monkeys with active disease. TNF neutralization was associated with increased levels of interleukin-12, decreased levels of CCL4, increased chemokine receptor expression, and reduced mycobacteria-induced interferon-gamma production in blood but not in the affected mediastinal lymph nodes. Finally, the first signs of reactivation often occurred in thoracic lymph nodes. CONCLUSION These findings have important clinical implications for determining the mechanism of TNF neutralization-related tuberculosis.
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Affiliation(s)
- Philana Ling Lin
- Children's Hospital of Pittsburgh of the University of Pittsburgh Medical Center, Pittsburgh, PA, USA
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Masli S, Turpie B. Anti-inflammatory effects of tumour necrosis factor (TNF)-alpha are mediated via TNF-R2 (p75) in tolerogenic transforming growth factor-beta-treated antigen-presenting cells. Immunology 2009; 127:62-72. [PMID: 18795974 DOI: 10.1111/j.1365-2567.2008.02933.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Exposure of macrophages to transforming growth factor (TGF)-beta is known to alter their functional phenotype such that antigen presentation by these cells leads to tolerance rather than an inflammatory immune response. Typically, eye-derived antigen-presenting cells (APCs) exposed to TGF-beta in the local environment are known to induce a form of peripheral tolerance and protect the eye from inflammatory immune effector-mediated damage. In response to TGF-beta, APCs increase their expression of tumour necrosis factor (TNF)-alpha and TNF receptor 2 (TNF-R2). Although TNF-alpha has been implicated in tolerance and the associated regulation of the inflammatory immune response, its source and the receptors involved remain unclear. In this report we determined the contribution of TNF-alpha and TNF-R2 expressed by TGF-beta-treated APCs to their anti-inflammatory tolerogenic effect. Our results indicate that APC-derived TNF-alpha is essential for the ability of APCs to regulate the immune response and their IL-12 secretion. Moreover, in the absence of TNF-R2, APCs exposed to TGF-beta failed to induce tolerance or regulatory cells known to participate in this tolerance. Also, blocking of TNF-R1 signalling enhanced the ability of the APCs to secrete increased TGF-beta in response to TGF-beta exposure. Together our results support an anti-inflammatory role of TNF-alpha in regulation of an immune response by TGF-beta-treated APCs and suggest that TNF-R2 contributes significantly to this role.
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Affiliation(s)
- Sharmila Masli
- Department of Ophthalmology, Harvard Medical School, Boston, MA, USA.
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Lyakh L, Trinchieri G, Provezza L, Carra G, Gerosa F. Regulation of interleukin-12/interleukin-23 production and the T-helper 17 response in humans. Immunol Rev 2009; 226:112-31. [PMID: 19161420 DOI: 10.1111/j.1600-065x.2008.00700.x] [Citation(s) in RCA: 163] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Interleukin-12 (IL-12) and IL-23 share a common chain. Yet, their production in response to pathogens is differentially regulated, and their functions are distinct and often antithetic. IL-12 is involved in the induction or amplification of the T-helper (Th) type 1 response, whereas IL-23 has been associated with the generation of the Th17 response and IL-17 production. Mycobacterium tuberculosis and yeast zymosan induce IL-23, but in the absence of other stimuli, no IL-12 is induced in human dendritic cells (DCs). The stimulation of IL-23 by M. tuberculosis was mostly explained by the triggering of Toll-like receptor (TLR2) and the cytoplasmic receptor nucleotide oligomerization domain (NOD)-containing protein 2, whereas zymosan induces IL-23 primarily by stimulating the beta-glucan receptor dectin-1 alone or in combination with TLR2. IL-23, IL-6, transforming growth factor (TGF-beta1), and IL-1beta in supernatants from activated human DCs induce human naive CD4(+) T cells to produce IL-17. These data are consistent with various recent reports that TGF-beta is an inducer of IL-17 production both in human and in mouse cells. However, IL-1 is necessary in combination with some or all of the other cytokines to induce IL-17 production in human T cells. The ability of various stimuli to induce Th17 cells depends not only on their induction of IL-23, IL-6, and TGF-beta production in DCs but also on their ability to activate directly or indirectly the inflammasome and to induce IL-1beta.
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Affiliation(s)
- Lyudmila Lyakh
- Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702-1201, USA
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Th2 polarization in peripheral blood mononuclear cells from human immunodeficiency virus (HIV)-infected subjects, as activated by HIV virus-like particles. J Virol 2008; 83:304-13. [PMID: 18945779 DOI: 10.1128/jvi.01606-08] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We have recently shown that human immunodeficiency virus type 1 (HIV-1) Pr55(gag) virus-like particles (HIV-VLPs), produced in a baculovirus expression system and presenting a gp120 molecule from a Ugandan HIV-1 isolate of clade A, induce maturation and activation of monocyte-derived dendritic cells (MDDCs) with a production of Th1- and Th2-specific cytokines. Furthermore, HIV-VLP-loaded MDDCs are able to induce a primary and secondary response in autologous human CD4(+) T cells in an ex vivo immunization assay. In the present study, we show that similar data can be obtained directly with fresh peripheral blood mononuclear cells (PBMCs), and the HIV-1 seropositivity status, with either low or high viremia, does not significantly impair the immune activation status and the responsiveness of circulating monocyte CD14(+) cell populations to an immunogenic stimulus. Some HIV-1-seropositive subjects, however, show a complete lack of maturation induced by HIV-VLPs in CD14(+) circulating cells, which does not consistently correlate with an advanced status of HIV-1 infection. The established Th2 polarization in both HIV-seropositive groups is efficiently boosted by HIV-VLP induction and does not switch into a Th1 pattern, strongly suggesting that specific Th1 adjuvants would be required for therapeutic effectiveness in HIV-1-infected subjects. These results indicate the possibility of screening PBMCs for donor susceptibility to an immunogen treatment, which would greatly simplify the identification of "responsive" vaccinees as well as the understanding of eventual failures in individuals enrolled in clinical trials.
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Notley CA, Inglis JJ, Alzabin S, McCann FE, McNamee KE, Williams RO. Blockade of tumor necrosis factor in collagen-induced arthritis reveals a novel immunoregulatory pathway for Th1 and Th17 cells. ACTA ACUST UNITED AC 2008; 205:2491-7. [PMID: 18936235 PMCID: PMC2571924 DOI: 10.1084/jem.20072707] [Citation(s) in RCA: 160] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
IL-17 is implicated in the pathogenesis of rheumatoid arthritis (RA) and has previously been shown to be induced by tumor necrosis factor (TNF) in vitro. The aim of this study was to assess the impact of TNF inhibition on IL-17 production in collagen-induced arthritis, a model of RA. TNF blockade using TNFR-Fc fusion protein or anti-TNF monoclonal antibody reduced arthritis severity but, unexpectedly, expanded populations of Th1 and Th17 cells, which were shown by adoptive transfer to be pathogenic. Th1 and Th17 cell populations were also expanded in collagen-immunized TNFR p55−/− but not p75−/− mice. The expression of IL-12/IL-23 p40 was up-regulated in lymph nodes (LN) from p55−/− mice, and the expansion of Th1/Th17 cells was abrogated by blockade of p40. Treatment of macrophages with rTNF also inhibited p40 production in vitro. These findings indicate that at least one of the ways in which TNF regulates Th1/Th17 responses in arthritis is by down-regulating the expression of p40. Finally, although TNF blockade increased numbers of Th1 and Th17 cells in LN, it inhibited their accumulation in the joint, thereby providing an explanation for the paradox that anti-TNF therapy ameliorates arthritis despite increasing numbers of pathogenic T cells.
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Affiliation(s)
- Clare A Notley
- Kennedy Institute of Rheumatology Division, Imperial College London, London, W6 8LH, England, UK
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Williams RO. Paradoxical effects of tumour necrosis factor-alpha in adjuvant-induced arthritis. Arthritis Res Ther 2008; 10:113. [PMID: 18564403 PMCID: PMC2483450 DOI: 10.1186/ar2430] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Anti-tumour necrosis factor (TNF)α therapy is highly effective in rheumatoid arthritis and it is surprising, therefore, that a recent study showed that intraperitoneal administration of recombinant TNFα reduced the severity of adjuvant-induced arthritis and decreased IFNγ expression in cultured draining lymph node cells. Furthermore, in untreated arthritic rats, maximal TNFα expression in draining lymph node cells coincided with spontaneous disease remission, suggesting a role for endogenous TNFα in recovery from arthritis. If confirmed in further studies, these findings suggest that, in addition to its well-established pro-inflammatory properties, TNFα may also play a disease-limiting role in this model of rheumatoid arthritis by suppressing effector T cell responses.
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Sinha S, Kaler LJ, Proctor TM, Teuscher C, Vandenbark AA, Offner H. IL-13-mediated gender difference in susceptibility to autoimmune encephalomyelitis. THE JOURNAL OF IMMUNOLOGY 2008; 180:2679-85. [PMID: 18250480 DOI: 10.4049/jimmunol.180.4.2679] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Females tend to have stronger Th1-mediated immune responses and are more prone to develop autoimmune diseases, including multiple sclerosis. Macrophages are major effector cells capable of mediating or modulating immune responses in experimental autoimmune encephalomyelitis (EAE). IL-13 and estrogen have opposing roles on macrophages (the former enhancing and the latter inhibiting) in terms of MHC class II (MHC II) up-regulation and, thus, these factors might influence susceptibility to EAE differently in females vs males. In accordance with this hypothesis, females lacking IL-13 displayed lower incidence and milder EAE disease severity than males after immunization with myelin oligodendrocyte glycoprotein (MOG)-35-55 peptide/CFA/pertussis toxin. Female IL-13 knockout (KO) mice with EAE consistently had reduced infiltration of CD11b(+) macrophages in the CNS along with significantly reduced expression of MHC II on these cells. Impaired MHC II expression was further corroborated upon LPS stimulation of female but not male bone marrow-derived CD11b(+) macrophages from IL-13KO mice, with restored expression after IL-13 pretreatment of female but not male macrophages. APCs from IL-13KO females induced less proliferation by MOG-35-55-reactive T cells, and splenocytes from MOG peptide-immunized females had lower expression of IL-12, IFN-gamma, MIP-2, and IFN-gamma-inducible protein 10 than males. In contrast, these splenocytes had higher expression of anti-inflammatory factors, IL-10, TGF-beta1, and FoxP3, a cytokine pattern typical of regulatory type II monocytes. These data suggest that the difference in EAE susceptibility in females is strongly influenced by gender-specific proinflammatory effects of IL-13, mediated in part through up-regulation of Th1-inducing cytokines and MHC II on CD11b(+) macrophages.
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Affiliation(s)
- Sushmita Sinha
- Neuroimmunology Research, Veterans Affairs Medical Center, 3710 S.W. U.S. Veterans Hospital Road, Portland, OR 97239, USA
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Hwang SA, Wilk KM, Bangale YA, Kruzel ML, Actor JK. Lactoferrin modulation of IL-12 and IL-10 response from activated murine leukocytes. Med Microbiol Immunol 2007; 196:171-80. [PMID: 17377816 PMCID: PMC2551752 DOI: 10.1007/s00430-007-0041-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2006] [Indexed: 01/06/2023]
Abstract
Lactoferrin possesses a wide range of immunomodulatory activities, including promotion of the delayed type hypersensitivity response (DTH) towards BCG (Bacillus Calmette Guerin) antigens. Addition of Lactoferrin as an adjuvant to the BCG vaccine was previously demonstrated to augment protection against subsequent mycobacterial challenge, with concomitant development of a strong T cell helper type 1 (TH1) immunity. Because generation of TH1 immunity is in large part dependent on the balance of monocytic pro- and anti-inflammatory cytokines, the effect of Lactoferrin on leukocytes was investigated. Lactoferrin enhanced proinflammatory responses in a dose-dependant manner from splenocyte and adherent (F4/80+) splenocyte populations, bone marrow derived monocytes (BMM), and J774A.1 cultured cells. In all scenarios tested, Lactoferrin induced a strong increase in the ratio of IL-12:IL-10 production from LPS stimulated cells. Examination of Lactoferrin effects on BCG infected J774A.1 cells and on BMM revealed similar immunomodulatory effects, with particularly strong increase in IL-12 production. Furthermore, immunization of mice with BCG admixed with Lactoferrin led to increased generation of CD4+ cells expressing IFN-gamma upon restimulation with BCG antigens. These results provide molecular evidence to support the role of Lactoferrin as an adjuvant candidate to augment development of DTH response to vaccine antigens.
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Affiliation(s)
- Shen-An Hwang
- Department of Pathology and Laboratory Medicine, Program in Molecular Pathology, Houston, TX 77030, USA
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Keller CC, Yamo O, Ouma C, Ong'echa JM, Ounah D, Hittner JB, Vulule JM, Perkins DJ. Acquisition of hemozoin by monocytes down-regulates interleukin-12 p40 (IL-12p40) transcripts and circulating IL-12p70 through an IL-10-dependent mechanism: in vivo and in vitro findings in severe malarial anemia. Infect Immun 2006; 74:5249-60. [PMID: 16926419 PMCID: PMC1594872 DOI: 10.1128/iai.00843-06] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Severe malarial anemia (SMA) is a primary cause of morbidity and mortality in immune-naïve infants and young children residing in areas of holoendemic Plasmodium falciparum transmission. Although the immunopathogenesis of SMA is largely undefined, we have previously shown that systemic interleukin-12 (IL-12) production is suppressed during childhood blood-stage malaria. Since IL-10 and tumor necrosis factor alpha (TNF-alpha) are known to decrease IL-12 synthesis in a number of infectious diseases, altered transcriptional regulation of these inflammatory mediators was investigated as a potential mechanism for IL-12 down-regulation. Ingestion of naturally acquired malarial pigment (hemozoin [PfHz]) by monocytes promoted the overproduction of IL-10 and TNF-alpha relative to the production of IL-12, which correlated with an enhanced severity of malarial anemia. Experiments with cultured peripheral blood mononuclear cells (PBMC) and CD14(+) cells from malaria-naïve donors revealed that physiological concentrations of PfHz suppressed IL-12 and augmented IL-10 and TNF-alpha by altering the transcriptional kinetics of IL-12p40, IL-10, and TNF-alpha, respectively. IL-10 neutralizing antibodies, but not TNF-alpha antibodies, restored PfHz-induced suppression of IL-12. Blockade of IL-10 and the addition of recombinant IL-10 to cultured PBMC from children with SMA confirmed that IL-10 was responsible for malaria-induced suppression of IL-12. Taken together, these results demonstrate that PfHz-induced up-regulation of IL-10 is responsible for the suppression of IL-12 during malaria.
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Affiliation(s)
- Christopher C Keller
- University of Pittsburgh Graduate School of Public Health, Department of Infectious Diseases and Microbiology, 130 DeSoto Street, 603 Parran Hall, Pittsburgh, PA 15261, USA
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Buonaguro L, Tornesello ML, Tagliamonte M, Gallo RC, Wang LX, Kamin-Lewis R, Abdelwahab S, Lewis GK, Buonaguro FM. Baculovirus-derived human immunodeficiency virus type 1 virus-like particles activate dendritic cells and induce ex vivo T-cell responses. J Virol 2006; 80:9134-43. [PMID: 16940524 PMCID: PMC1563937 DOI: 10.1128/jvi.00050-06] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
We have recently developed a candidate human immunodeficiency virus type 1 (HIV-1) vaccine model based on HIV-1 Pr55(gag) virus-like particles (HIV-VLPs), produced in a baculovirus expression system and presenting a gp120 molecule from a Ugandan HIV-1 isolate of clade A (HIV-VLP(A)s). The HIV-VLP(A)s show the induction in BALB/c mice of systemic and mucosal neutralizing antibodies as well as cytotoxic T lymphocytes, by intraperitoneal as well as intranasal administration. In the present article, the effects of the baculovirus-expressed HIV-VLPs on human immature monocyte-derived dendritic cells (MDDCs) have been evaluated. The HIV-VLPs efficiently induce maturation and activation of MDDCs and are incorporated into MDDCs preferentially via an actin-dependent macropinocytosis and endocytosis. The HIV-VLP-activated MDDCs show enhanced Th1- and Th2-specific cytokine production, and the effects of HIV-VLPs on MDDCs are not mediated through Toll-like receptors 2 and 4 (TLR2 and -4) signaling. Finally, HIV-VLP-loaded MDDCs are able to induce a primary and secondary response in autologous human CD4(+) T cells in an ex vivo immunization assay. Our results on the interaction and processing of baculovirus HIV-VLPs by MDDCs give an insight into the mechanisms underlying the immune response induced by HIV-VLP(A)s in vivo.
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Affiliation(s)
- L Buonaguro
- Laboratory of Viral Oncogenesis and Immunotherapies, and AIDS Reference Center, Istituto Nazionale Tumori Fondazione G. Pascale, Via Mariano Semmola 1, 80131 Naples, Italy
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Gratchev A, Kzhyshkowska J, Köthe K, Muller-Molinet I, Kannookadan S, Utikal J, Goerdt S. Mphi1 and Mphi2 can be re-polarized by Th2 or Th1 cytokines, respectively, and respond to exogenous danger signals. Immunobiology 2006; 211:473-86. [PMID: 16920487 DOI: 10.1016/j.imbio.2006.05.017] [Citation(s) in RCA: 143] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2006] [Accepted: 05/24/2006] [Indexed: 12/15/2022]
Abstract
Macrophages (Mphi) represent a dynamic cell population that develops and operates within a changing microenvironment. In parallel to Th1/Th2 cells, primary Mphi may undergo classical (Mphi1) or alternative (Mphi2) activation. Here, we investigated whether Mphi1/Mphi2 may be re-polarized by a secondary stimulation by Th1 or Th2 cytokines or by exogenous danger signals. We established that Mphi1IFNgamma respond to alternative activation by IL-4 and IL-10 by de novo secretion of Th2 cytokines AMAC-1 and IL-1ra, and by an increase in phagocytic capacity and a decrease in bactericidal activity. Vice versa, Mphi2 responded to classical activation by IFNgamma exhibiting reduced phagocytosis and significantly increased bacterial killing while being refractory regarding secretion of TNFalpha, IL-1beta and IL-12. In response to the bacterial danger signals LPS and MDP, both Mphi1 and Mphi2 produced IL-1beta and TNFalpha; in addition Mphi2 expressed the Th1-inducing cytokine IL-12. The ability of Mphi to be re-polarized and to react to exogenous danger signals is a precondition to down-regulate an outdated immune reaction and to retain the capacity to mount an adequate anti-bacterial response. Selective refractoriness of Mphi1 and Mphi2 to IFNgamma- and LPS-induced cytokine secretion may contribute to prevent autoimmunity.
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Affiliation(s)
- Alexei Gratchev
- Department of Dermatology, University Medical Centre Mannheim, Ruprecht-Karls University of Heidelberg, Mannheim, Germany.
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Wheeler RD, Zehntner SP, Kelly LM, Bourbonnière L, Owens T. Elevated interferon gamma expression in the central nervous system of tumour necrosis factor receptor 1-deficient mice with experimental autoimmune encephalomyelitis. Immunology 2006; 118:527-38. [PMID: 16780563 PMCID: PMC1782311 DOI: 10.1111/j.1365-2567.2006.02395.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Inflammation in the central nervous system (CNS) can be studied in experimental autoimmune encephalomyelitis (EAE). The proinflammatory cytokines interferon-gamma (IFN-gamma) and tumour necrosis factor (TNF) are implicated in EAE pathogenesis. Signals through the type 1 TNF receptor (TNFR1) are required for severe EAE to develop, whereas deficiency in IFN-gamma or its receptor result in more severe EAE. We investigated IFN-gamma expression in TNFR1-deficient (TNFR1-/-) mice. We describe here that there were more IFN-gamma-secreting T cells present in the CNS of TNFR1-/- mice during EAE compared to wild-type (WT) mice, despite that clinical symptoms were mild, with delayed onset. There was greater expression of IL-12/23p40 by antigen-presenting cells in these mice, and in vitro, TNFR1-/- antigen-presenting cells induced greater secretion of IFN-gamma but not interleukin (IL)-17 when cultured with primed T cells than did WT antigen presenting cells. TNFR1-/- mice with EAE had significantly higher expression of CXCL10 mRNA (but not CCL5 mRNA) in the CNS compared to WT mice with EAE. These data demonstrate that IFN-gamma expression is enhanced in the CNS of TNFR1-/- mice with EAE and suggest that IFN-gamma levels do not necessarily correlate with EAE severity.
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MESH Headings
- Animals
- Encephalomyelitis, Autoimmune, Experimental/genetics
- Encephalomyelitis, Autoimmune, Experimental/immunology
- Encephalomyelitis, Autoimmune, Experimental/microbiology
- Gene Expression Regulation
- Interferon-gamma/analysis
- Interferon-gamma/genetics
- Macrophages/immunology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Receptors, Tumor Necrosis Factor, Type I/analysis
- Receptors, Tumor Necrosis Factor, Type I/genetics
- Reverse Transcriptase Polymerase Chain Reaction
- Spinal Cord/immunology
- T-Lymphocytes/immunology
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Affiliation(s)
- Rachel D Wheeler
- Neuroimmunology Unit, Montreal Neurological InstituteMontreal, Quebec, Canada
| | - Simone P Zehntner
- Neuroimmunology Unit, Montreal Neurological InstituteMontreal, Quebec, Canada
| | - Lisa M Kelly
- Neuroimmunology Unit, Montreal Neurological InstituteMontreal, Quebec, Canada
| | - Lyne Bourbonnière
- Neuroimmunology Unit, Montreal Neurological InstituteMontreal, Quebec, Canada
| | - Trevor Owens
- Neuroimmunology Unit, Montreal Neurological InstituteMontreal, Quebec, Canada
- Medical Biotechnology Centre, University of Southern DenmarkOdense C, Denmark
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Yang CS, Lee JS, Jung SB, Oh JH, Song CH, Kim HJ, Park JK, Paik TH, Jo EK. Differential regulation of interleukin-12 and tumour necrosis factor-alpha by phosphatidylinositol 3-kinase and ERK 1/2 pathways during Mycobacterium tuberculosis infection. Clin Exp Immunol 2006; 143:150-60. [PMID: 16367946 PMCID: PMC1809561 DOI: 10.1111/j.1365-2249.2005.02966.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/23/2005] [Indexed: 11/30/2022] Open
Abstract
Interleukin (IL)-12 and tumour necrosis factor (TNF)-alpha are both thought to be critical factors in the defence against mycobacteria but are known to play different roles. In this study, we investigated the regulatory pathways for IL-12 and TNF-alpha expression in human monocyte-derived macrophages (MDMs) after treatment with Mycobacterium tuberculosis H37Rv or the Triton X-100 solubilized proteins (TSP) purified from M. tuberculosis. We found a rapid phosphorylation of Akt and extracellular signal-regulated kinase (ERK), albeit with differential activation kinetics, in human MDMs treated with M. tuberculosis or TSP. Studies using inhibitors selective for phosphatidylinositol 3-kinase (PI 3-K) and ERK 1/2 show that both pathway plays an essential role in the induction of TNF-alpha at both the transcriptional and translational levels in human MDMs. In contrast, blockade of the PI 3-K/Akt or ERK 1/2 pathways significantly increased M. tuberculosis- or TSP-induced IL-12 p40 and p35 mRNA and bioactive p70 protein. The enhancement of IL-12 levels by inhibition of PI 3-K and ERK 1/2 was not reversed by neutralization of TNF-alpha or addition of rhTNF-alpha, suggesting that the negative regulation of IL-12 is not mediated by concomitant TNF-alpha suppression. Further, PI 3-K activity is required for the M. tuberculosis- or TSP-induced phosphorylation of ERK 1/2 activation. TSP from M. tuberculosis shows a similar dependency on the PI 3-K and ERK 1/2 pathways to those by M. tuberculosis. Collectively, these data suggest that the Th1-driving cytokine IL-12 and proinflammatory cytokine TNF-alpha are differentially regulated by PI 3-K and ERK 1/2 pathways in human MDMs during mycobacterial infection. These results may provide therapeutic targets for precise and specific fine-tuning of cytokine responses.
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Affiliation(s)
- C-S Yang
- Department of Microbiology, College of Medicine, Chungnam National University, Daejeon, Korea
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44
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Zakharova M, Ziegler HK. Paradoxical anti-inflammatory actions of TNF-alpha: inhibition of IL-12 and IL-23 via TNF receptor 1 in macrophages and dendritic cells. THE JOURNAL OF IMMUNOLOGY 2005; 175:5024-33. [PMID: 16210605 DOI: 10.4049/jimmunol.175.8.5024] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
IL-12 and TNF-alpha are central proinflammatory cytokines produced by macrophages and dendritic cells. Disregulation of TNF-alpha is associated with sepsis and autoimmune diseases such as rheumatoid arthritis. However, new evidence suggests an anti-inflammatory role for TNF-alpha. TNF-alpha-treated murine macrophages produced less IL-12p70 and IL-23, after stimulation with IFN-gamma and LPS. Frequency of IL-12p40-producing macrophages correspondingly decreased as measured by intracellular cytokine staining. IL-12p40 production was also inhibited in dendritic cells. TNFR1 was established as the main receptor involved in IL-12p40 regulation, because IL-12p40 levels were not affected by TNF-alpha in TNFR1(-/-)-derived macrophages. Macrophages activated during Listeria monocytogenes infection were more susceptible to inhibition by TNF-alpha than cells from naive animals, which suggests a regulatory role for TNF-alpha in later stages of infection. This nonapoptotic anti-inflammatory regulation of IL-12 and IL-23 is an important addition to the multitude of TNF-alpha-induced responses determined by cell-specific receptor signaling.
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MESH Headings
- Animals
- Apoptosis/physiology
- Cell Differentiation/physiology
- Cells, Cultured
- Dendritic Cells/metabolism
- Inflammation Mediators/physiology
- Interleukin-12/antagonists & inhibitors
- Interleukin-12/biosynthesis
- Interleukin-12 Subunit p40
- Interleukin-23
- Interleukin-23 Subunit p19
- Interleukins/antagonists & inhibitors
- Listeriosis/metabolism
- Macrophages/metabolism
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Transgenic
- Protein Subunits/antagonists & inhibitors
- Protein Subunits/biosynthesis
- Receptors, Tumor Necrosis Factor, Type I/deficiency
- Receptors, Tumor Necrosis Factor, Type I/genetics
- Receptors, Tumor Necrosis Factor, Type I/physiology
- T-Lymphocytes/cytology
- T-Lymphocytes/metabolism
- Tumor Necrosis Factor-alpha/physiology
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Affiliation(s)
- Maria Zakharova
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA 30322, USA
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Ito Y, Kawamura I, Kohda C, Tsuchiya K, Nomura T, Mitsuyama M. Seeligeriolysin O, a protein toxin of Listeria seeligeri, stimulates macrophage cytokine production via Toll-like receptors in a profile different from that induced by other bacterial ligands. Int Immunol 2005; 17:1597-606. [PMID: 16291660 DOI: 10.1093/intimm/dxh341] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Seeligeriolysin O (LSO), a member of cholesterol-dependent cytolysins of Listeria seeligeri, exhibits cytokine-inducing activity. In this study, we examined the profile of cytokines expressed in macrophages of mice after stimulation with full-length form of recombinant LSO (rLSO530), C-terminal-truncated protein (rLSO483) and two authentic cytokine-inducing Toll-like receptor (TLR) ligands from bacteria, peptidoglycan (PGN) and LPS. Both rLSO530 and rLSO483 were able to induce IL-12 p40 and IL-12 p70 more strongly in macrophages than PGN or LPS. In contrast, IFN-beta and nitric oxide were induced by LPS but not by rLSO530, rLSO483 or PGN. In the presence of exogenously added IFN-beta, IL-12 p40 and IL-12 p70 production was inhibited after LSO stimulation, but IL-12 p70 production was enhanced after PGN stimulation. Although LSO signaling appeared to be associated with both TLR2 and TLR4, the profile of cytokine production by LSO stimulation was distinct from those by stimulation with PGN or LPS. Thus, it was shown that LSO is a unique bacterial ligand that induces macrophage cytokine production in a manner different from PGN or LPS.
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Affiliation(s)
- Yutaka Ito
- Department of Microbiology, Kyoto University Graduate School of Medicine, Japan.
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46
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Khan N, Rahim SS, Boddupalli CS, Ghousunnissa S, Padma S, Pathak N, Thiagarajan D, Hasnain SE, Mukhopadhyay S. Hydrogen peroxide inhibits IL-12 p40 induction in macrophages by inhibiting c-rel translocation to the nucleus through activation of calmodulin protein. Blood 2005; 107:1513-20. [PMID: 16249388 DOI: 10.1182/blood-2005-04-1707] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Although the antimicrobial activity of reactive oxygen species (ROSs) is well defined, the role of ROSs in regulating the immune response of the body is not well understood. We now provide evidence that hydrogen peroxide (H2O2), a major component of ROSs, inhibits interleukin-12 (IL-12) p40 and IL-12 p70 induction in murine macrophages and catalase pretreatment prevents H2O2-mediated down-regulation of IL-12. Endogenous accumulation of H2O2/ROSs in macrophages treated with alloxan resulted in IL-12 p40 inhibition. Although nuclear expression of both p50 and p65 NF-kappaB increased on H2O2 exposure, nuclear c-rel level was inhibited. Overexpression of c-rel restored IL-12 p40 on stimulation with lipopolysaccharide plus IFN-gamma during H2O2 treatment. H2O2 did not inhibit c-rel induction in cytosol; however, it prevented the transport of c-rel from cytosol to the nucleus. H2O2 activated calmodulin (CaM) protein in the cytosol, which subsequently sequestered c-rel in the cytosol preventing its transport to the nucleus. The CaM inhibitor trifIuoperazine increased both nuclear c-rel and IL-12 p40 levels in H2O2-treated macrophages, emphasizing a role of CaM in these processes. H2O2/ROSs thus down-regulate IL-12 induction in macrophages by a novel pathway inhibiting c-rel translocation to the nucleus through activation of CaM protein.
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Affiliation(s)
- Nooruddin Khan
- Laboratory of Molecular and Cellular Biology, CDFD, Hyderabad, India
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47
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Papasavvas E, Sun J, Luo Q, Moore EC, Thiel B, MacGregor RR, Minty A, Mounzer K, Kostman JR, Montaner LJ. IL-13 Acutely Augments HIV-Specific and Recall Responses from HIV-1-Infected Subjects In Vitro by Modulating Monocytes. THE JOURNAL OF IMMUNOLOGY 2005; 175:5532-40. [PMID: 16210662 DOI: 10.4049/jimmunol.175.8.5532] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We show in this study that acute exposure of PBMCs derived from HIV-infected subjects to IL-13 results in increased recall T cell lymphoproliferative responses against HIV-1 p24 (n = 30, p < 0.0001) and other recall Ags (influenza, n = 43, p < 0.0001; purified protein derivative tuberculin, n = 6, p = 0.0299). This effect is due to a mechanism that acutely targets APC function in the adherent monocyte subset, as shown by the expansion of CD4(+) T cell responses following coculture of IL-13-treated enriched CD14(+) monocytes with donor-matched enriched CD4(+) T cells and Ag. Exposure to IL-13 over 18-72 h resulted in a significant enhancement of monocyte endocytosis (n = 11, p = 0.0005), CD86 expression (n = 12, p = 0.001), and a significant decrease in spontaneous apoptosis (n = 8, p = 0.008). Moreover, IL-13 exposure induced a significant decrease of significantly elevated constitutive levels of PBMC-secreted TNF-alpha (n = 14, p < 0.001) and IL-10 (n = 29, p < 0.001) within 18 h of exposure ex vivo, also reflected by decreased gene expression in the adherent cell population. Our data show that IL-13 is able to acutely enhance the function of the CD14(+) cell subset toward supporting Ag-specific cell-mediated responses in chronic HIV-1 infection.
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48
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Freeman MM, Ziegler HK. Simultaneous Th1-type cytokine expression is a signature of peritoneal CD4+ lymphocytes responding to infection with Listeria monocytogenes. THE JOURNAL OF IMMUNOLOGY 2005; 175:394-403. [PMID: 15972673 DOI: 10.4049/jimmunol.175.1.394] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The robust murine response to infection with Listeria monocytogenes makes an excellent model to study the functional development of immune cells. We investigated the cellular immune response to i.p. infection using intracellular cytokine staining to identify Ag-specific lymphocytes. CD4(+) peritoneal exudate cells obtained 10 days postinfection predominantly coexpressed TNF-alpha, IFN-gamma, and IL-2 after polyclonal or Ag stimulation. A population of cells simultaneously making TNF-alpha and IFN-gamma was also detected but at a lower frequency. By following the kinetics of the response to Listeria, we found that CD4(+) lymphocytes coexpressing TNF-alpha and IFN-gamma dominated on day 6 postinfection and then declined. From days 10-27, TNF-alpha(+)IFN-gamma(+)IL-2(+) (triple-positive) was the most prevalent cytokine phenotype, and the frequency steadily declined. These characteristic cytokine expression patterns were observed in both primary and secondary responses to Listeria infection and developed even when infection was terminated with antibiotic treatment. A cytokine-assisted immunization procedure resulted in both double- and triple-positive cells, but the clear predominance of triple-positive cells required Listeria infection. Triple-positive cells were preferentially noted in the peritoneal cavity tissue site; spleen cells displayed a predominant population of double-positive T cells (TNF-alpha(+)IFN-gamma(+)). We speculate that the appearance of triple-positive cells represents a functionally significant subset important in host defense at nonlymphoid tissue sites.
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Affiliation(s)
- Molly M Freeman
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA 30329, USA
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49
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Ellermann-Eriksen S. Macrophages and cytokines in the early defence against herpes simplex virus. Virol J 2005; 2:59. [PMID: 16076403 PMCID: PMC1215526 DOI: 10.1186/1743-422x-2-59] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2005] [Accepted: 08/03/2005] [Indexed: 11/12/2022] Open
Abstract
Herpes simplex virus (HSV) type 1 and 2 are old viruses, with a history of evolution shared with humans. Thus, it is generally well-adapted viruses, infecting many of us without doing much harm, and with the capacity to hide in our neurons for life. In rare situations, however, the primary infection becomes generalized or involves the brain. Normally, the primary HSV infection is asymptomatic, and a crucial element in the early restriction of virus replication and thus avoidance of symptoms from the infection is the concerted action of different arms of the innate immune response. An early and light struggle inhibiting some HSV replication will spare the host from the real war against huge amounts of virus later in infection. As far as such a war will jeopardize the life of the host, it will be in both interests, including the virus, to settle the conflict amicably. Some important weapons of the unspecific defence and the early strikes and beginning battle during the first days of a HSV infection are discussed in this review. Generally, macrophages are orchestrating a multitude of anti-herpetic actions during the first hours of the attack. In a first wave of responses, cytokines, primarily type I interferons (IFN) and tumour necrosis factor are produced and exert a direct antiviral effect and activate the macrophages themselves. In the next wave, interleukin (IL)-12 together with the above and other cytokines induce production of IFN-gamma in mainly NK cells. Many positive feed-back mechanisms and synergistic interactions intensify these systems and give rise to heavy antiviral weapons such as reactive oxygen species and nitric oxide. This results in the generation of an alliance against the viral enemy. However, these heavy weapons have to be controlled to avoid too much harm to the host. By IL-4 and others, these reactions are hampered, but they are still allowed in foci of HSV replication, thus focusing the activity to only relevant sites. So, no hero does it alone. Rather, an alliance of cytokines, macrophages and other cells seems to play a central role. Implications of this for future treatment modalities are shortly considered.
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Affiliation(s)
- Svend Ellermann-Eriksen
- Department of Clinical Microbiology, Aarhus University Hospital, Skejby Sygehus, Brendstrupgaardsvej 100, DK-8200 Aarhus N., Denmark.
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50
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Dorsch M, Qiu Y, Soler D, Frank N, Duong T, Goodearl A, O'Neil S, Lora J, Fraser CC. PK1/EG-VEGF induces monocyte differentiation and activation. J Leukoc Biol 2005; 78:426-34. [PMID: 15908459 DOI: 10.1189/jlb.0205061] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Macrophages exist as sentinels in innate immune response and react by expressing proinflammatory cytokines and up-regulating antigen-presenting and costimulatory molecules. We report a novel function for prokineticin-1 (PK1)/endocrine gland-derived vascular endothelial growth factor. Screening of murine tissue sections and cells for specific binding site leads to the identification of macrophages as an in vivo cellular target for PK1. We demonstrate PK1 induces differentiation of murine and human bone marrow cells into the monocyte/macrophage lineage. Human peripheral blood monocytes respond to PK1 by morphological changes and down-regulation of B7-1, CD14, CC chemokine receptor 5, and CXC chemokine receptor 4. Monocytes treated with PK1 have elevated interleukin (IL)-12 and tumor necrosis factor alpha and down-regulated IL-10 production in response to lipopolysaccharide. PK1 induces a distinct monocyte-derived cell population, which is primed for release of proinflammatory cytokines that favor a T helper cell type 1 response.
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Affiliation(s)
- Marion Dorsch
- Millennium Pharmaceuticals Inc., 35 Landsdowne St., Cambridge, MA 02139, USA
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