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Jerez HE, Simioni YR, Ghosal K, Morilla MJ, Romero EL. Cholesterol nanoarchaeosomes for alendronate targeted delivery as an anti-endothelial dysfunction agent. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2024; 15:517-534. [PMID: 38774586 PMCID: PMC11106671 DOI: 10.3762/bjnano.15.46] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 04/16/2024] [Indexed: 05/24/2024]
Abstract
Sodium alendronate (ALN) is a very hydrosoluble and poorly permeable molecule used as an antiresorptive agent and with vascular anticalcifying capacity. Loaded into targeted nanovesicles, its anti-inflammatory activity may be amplified towards extra-osseous and noncalcified target cells, such as severely irritated vascular endothelium. Here cytotoxicity, mitochondrial membrane potential, ATP content, and membrane fluidity of human endothelial venous cells (HUVECs) were determined after endocytosis of ALN-loaded nanoarchaeosomes (nanoARC-Chol(ALN), made of polar lipids from Halorubrum tebenquichense: cholesterol 7:3 w/w, 166 ± 5 nm, 0.16 ± 0.02 PDI, -40.8 ± 5.4 mV potential, 84.7 ± 21 µg/mg ALN/total lipids, TL). The effect of nanoARC-Chol(ALN) was further assessed on severely inflamed HUVECs. To that aim, HUVECs were grown on a porous barrier on top of a basal compartment seeded either with macrophages or human foam cells. One lighter and one more pronounced inflammatory context was modelled by adding lipopolysaccharide (LPS) to the apical or the apical and basal compartments. The endocytosis of nanoARC-Chol(ALN), was observed to partly reduce the endothelial-mesenchymal transition of HUVECs. Besides, while 10 mg/mL dexamethasone, 7.6 mM free ALN and ALN-loaded liposomes failed, 50 μg/mL TL + 2.5 μg/mL ALN (i.e., nanoARC-Chol(ALN)) reduced the IL-6 and IL-8 levels by, respectively, 75% and 65% in the mild and by, respectively, 60% and 40% in the pronounced inflammation model. This is the first report showing that the endocytosis of nanoARC-Chol(ALN) by HUVECs magnifies the anti-inflammatory activity of ALN even under conditions of intense irritation, not only surpassing that of free ALN but also that of dexamethasone.
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Affiliation(s)
- Horacio Emanuel Jerez
- Nanomedicine Research and Development Centre (NARD), Science and Technology Department, National University of Quilmes, Roque Sáenz Peña 352, Bernal, Buenos Aires, Argentina
| | - Yamila Roxana Simioni
- Nanomedicine Research and Development Centre (NARD), Science and Technology Department, National University of Quilmes, Roque Sáenz Peña 352, Bernal, Buenos Aires, Argentina
| | - Kajal Ghosal
- Department of Pharmaceutical Technology, Jadavpur University, 188, Raja Subodh Chandra Mallick Rd., Jadavpur, Kolkata 700032, West Bengal, India
| | - Maria Jose Morilla
- Nanomedicine Research and Development Centre (NARD), Science and Technology Department, National University of Quilmes, Roque Sáenz Peña 352, Bernal, Buenos Aires, Argentina
| | - Eder Lilia Romero
- Nanomedicine Research and Development Centre (NARD), Science and Technology Department, National University of Quilmes, Roque Sáenz Peña 352, Bernal, Buenos Aires, Argentina
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Oliveira TB, Braga CL, Battaglini D, Pelosi P, Rocco PRM, Silva PL, Cruz FF. Comparison between sevoflurane and propofol on immunomodulation in an in vitro model of sepsis. Front Med (Lausanne) 2023; 10:1225179. [PMID: 37575989 PMCID: PMC10414536 DOI: 10.3389/fmed.2023.1225179] [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: 05/18/2023] [Accepted: 07/10/2023] [Indexed: 08/15/2023] Open
Abstract
Introduction Patients with sepsis often require sedation and/or anesthesia. Although the immunomodulatory effects of anesthetics have been increasingly recognized, the molecular mechanisms require better elucidation. We compared the effects of sevoflurane with propofol on the expression of pro- and anti-inflammatory biomarkers released by monocytes/macrophages and blood/bronchoalveolar lavage fluid (BALF) neutrophils, the phagocytic capacity of monocytes/ macrophages, and neutrophil migration, as well as mediators associated with alveolar epithelial and endothelial cells obtained from rats with sepsis. Methods Polymicrobial sepsis was induced by cecal ligation and puncture in nine male Wistar rats. After 48 h, animals were euthanized and their monocytes/alveolar macrophages, blood and BALF neutrophils, as well as alveolar epithelial and endothelial cells were extracted, and then exposed to (1) sevoflurane (1 minimal alveolar concentration), (2) propofol (50 μM), or (3) saline, control (CTRL) for 1 h. Results Sevoflurane reduced interleukin (IL)-6 mRNA expression in monocytes and alveolar macrophages (p = 0.007, p = 0.029), whereas propofol decreased IL-6 mRNA only in alveolar macrophages (p = 0.027) compared with CTRL. Sevoflurane increased IL-10 expression (p = 0.0002) in monocytes compared with propofol and increased IL-10 mRNA and transforming growth factor (TGF)-β mRNA (p = 0.037, p = 0.045) compared with CTRL. Both sevoflurane and propofol did not affect mRNA expression of IL-10 and TGF-β in alveolar macrophages. The phagocytic capacity of monocytes (p = 0.0006) and alveolar macrophages (p = 0.0004) was higher with sevoflurane compared with propofol. Sevoflurane, compared with CTRL, reduced IL-1β mRNA (p = 0.003, p = 0.009) and C-X-C chemokine receptor 2 mRNA (CXCR2, p = 0.032 and p = 0.042) in blood and BALF neutrophils, and increased CXCR4 mRNA only in BALF neutrophils (p = 0.004). Sevoflurane increased blood neutrophil migration (p = 0.015) compared with propofol. Both sevoflurane and propofol increased zonula occludens-1 mRNA (p = 0.046, p = 0.003) in alveolar epithelial cells and reduced Toll-like receptor 4 mRNA (p = 0.043, p = 0.006) in alveolar endothelial cells compared with CTRL. Only propofol reduced surfactant protein B mRNA (p = 0.028) in alveolar epithelial cells. Discussion Sevoflurane, compared with propofol, increased anti-inflammatory biomarkers in monocytes, but not in alveolar macrophages, enhanced monocyte/alveolar macrophage phagocytic capacity and increased neutrophil migration in in vitro experimental sepsis. Both propofol and sevoflurane protected lung epithelial and endothelial cells.
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Affiliation(s)
- Tainá B. Oliveira
- Laboratory of Pulmonary Investigation, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Cassia L. Braga
- Laboratory of Pulmonary Investigation, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Denise Battaglini
- Anesthesia and Critical Care, San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, University of Genoa, Genoa, Italy
| | - Paolo Pelosi
- Anesthesia and Critical Care, San Martino Policlinico Hospital, IRCCS for Oncology and Neurosciences, University of Genoa, Genoa, Italy
- Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Genoa, Italy
| | - Patricia R. M. Rocco
- Laboratory of Pulmonary Investigation, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Pedro L. Silva
- Laboratory of Pulmonary Investigation, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fernanda F. Cruz
- Laboratory of Pulmonary Investigation, Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Xiang P, Blanchard V, Francis GA. Smooth Muscle Cell—Macrophage Interactions Leading to Foam Cell Formation in Atherosclerosis: Location, Location, Location. Front Physiol 2022; 13:921597. [PMID: 35795646 PMCID: PMC9251363 DOI: 10.3389/fphys.2022.921597] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Accepted: 05/30/2022] [Indexed: 11/13/2022] Open
Abstract
Cholesterol-overloaded cells or “foam cells” in the artery wall are the biochemical hallmark of atherosclerosis, and are responsible for much of the growth, inflammation and susceptibility to rupture of atherosclerotic lesions. While it has previously been thought that macrophages are the main contributor to the foam cell population, recent evidence indicates arterial smooth muscle cells (SMCs) are the source of the majority of foam cells in both human and murine atherosclerosis. This review outlines the timeline, site of appearance and proximity of SMCs and macrophages with lipids in human and mouse atherosclerosis, and likely interactions between SMCs and macrophages that promote foam cell formation and removal by both cell types. An understanding of these SMC-macrophage interactions in foam cell formation and regression is expected to provide new therapeutic targets to reduce the burden of atherosclerosis for the prevention of coronary heart disease, stroke and peripheral vascular disease.
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Hemangiosarcoma cells induce M2 polarization and PD-L1 expression in macrophages. Sci Rep 2022; 12:2124. [PMID: 35136176 PMCID: PMC8826392 DOI: 10.1038/s41598-022-06203-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 01/25/2022] [Indexed: 02/07/2023] Open
Abstract
Hemangiosarcoma (HSA) is a malignant tumor derived from endothelial cells. Tumor-associated macrophages are one of the major components of tumor microenvironment and crucial for cancer development. The presence and function of macrophages in HSA have not been studied because there is no syngeneic model for HSA. In this study, we evaluated two mouse HSA cell lines and one immortalized mouse endothelial cell line for their usefulness as syngeneic models for canine HSA. Our results showed that the ISOS-1 cell line developed tumors with similar morphology to canine HSA. ISOS-1 cells highly expressed KDM2B and had similar KDM2B target expression patterns with canine HSA. Moreover, we determined that in both ISOS-1 and canine HSA tumors, macrophages were present as a major constituent of the tumor microenvironment. These macrophages were positive for CD204, an M2 macrophage marker, and express PD-L1, an immune checkpoint molecule. Canine HSA with macrophages expressing PD-L1 had a smaller number of T-cells in tumor tissues than tumors with PD-L1 negative macrophages. ISOS-1-conditioned medium could induce M2 polarization and PD-L1 expression in RAW264.7 mouse macrophage cell line and mouse peritoneal macrophages. These results show that ISOS-1 can be used as a syngenic model for canine HSA and suggest that macrophages play an important role in immune evasion in HSA. Using the syngeneic mouse model for canine HSA, we can further study the role of immune cells in the pathology of HSA.
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Qi Y, Huang L, Zeng Y, Li W, Zhou D, Xie J, Xie J, Tu Q, Deng D, Yin J. Pediococcus pentosaceus: Screening and Application as Probiotics in Food Processing. Front Microbiol 2021; 12:762467. [PMID: 34975787 PMCID: PMC8716948 DOI: 10.3389/fmicb.2021.762467] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 11/17/2021] [Indexed: 11/13/2022] Open
Abstract
Lactic acid bacteria (LAB) are vital probiotics in the food processing industry, which are widely spread in food additives and products, such as meat, milk, and vegetables. Pediococcus pentosaceus (P. pentosaceus), as a kind of LAB, has numerous probiotic effects, mainly including antioxidant, cholesterol-lowering, and immune effects. Recently, the applications in the probiotic- fermentation products have attracted progressively more attentions. However, it is necessary to screen P. pentosaceus with abundant functions from diverse sources due to the limitation about the source and species of P. pentosaceus. This review summarized the screening methods of P. pentosaceus and the exploration methods of probiotic functions in combination with the case study. The screening methods included primary screening and rescreening including gastric acidity resistance, bile resistance, adhesion, antibacterial effects, etc. The application and development prospects of P. pentosaceus were described in detail, and the shortcomings in the practical application of P. pentosaceus were evaluated to make better application of P. pentosaceus in the future.
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Affiliation(s)
- Yining Qi
- Key Laboratory of Protein Chemistry and Developmental Biology of Fish of Ministry of Education, Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Hunan Normal University, Changsha, China
| | - Le Huang
- Key Laboratory of Protein Chemistry and Developmental Biology of Fish of Ministry of Education, Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Hunan Normal University, Changsha, China
| | - Yan Zeng
- Key Laboratory of Protein Chemistry and Developmental Biology of Fish of Ministry of Education, Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Hunan Normal University, Changsha, China
| | - Wen Li
- Key Laboratory of Protein Chemistry and Developmental Biology of Fish of Ministry of Education, Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Hunan Normal University, Changsha, China
| | - Diao Zhou
- Key Laboratory of Protein Chemistry and Developmental Biology of Fish of Ministry of Education, Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Hunan Normal University, Changsha, China
| | | | - Junyan Xie
- CAS Key Laboratory of Agro-ecological Processes in Subtropical Region, Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic Process, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
| | - Qiang Tu
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
- *Correspondence: Qiang Tu,
| | - Dun Deng
- Tangrenshen Group Co., Ltd., Zhuzhou, China
- Dun Deng,
| | - Jia Yin
- Key Laboratory of Protein Chemistry and Developmental Biology of Fish of Ministry of Education, Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, Hunan International Joint Laboratory of Animal Intestinal Ecology and Health, Hunan Normal University, Changsha, China
- Jia Yin,
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Rusanov AL, Kozhin PM, Tikhonova OV, Zgoda VG, Loginov DS, Chlastáková A, Selinger M, Sterba J, Grubhoffer L, Luzgina NG. Proteome Profiling of PMJ2-R and Primary Peritoneal Macrophages. Int J Mol Sci 2021; 22:6323. [PMID: 34204832 PMCID: PMC8231560 DOI: 10.3390/ijms22126323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 05/30/2021] [Accepted: 06/09/2021] [Indexed: 11/16/2022] Open
Abstract
In vitro models are often used for studying macrophage functions, including the process of phagocytosis. The application of primary macrophages has limitations associated with the individual characteristics of animals, which can lead to insufficient standardization and higher variability of the obtained results. Immortalized cell lines do not have these disadvantages, but their responses to various signals can differ from those of the living organism. In the present study, a comparative proteomic analysis of immortalized PMJ2-R cell line and primary peritoneal macrophages isolated from C57BL/6 mice was performed. A total of 4005 proteins were identified, of which 797 were quantified. Obtained results indicate significant differences in the abundances of many proteins, including essential proteins associated with the process of phagocytosis, such as Elmo1, Gsn, Hspa8, Itgb1, Ncf2, Rac2, Rack1, Sirpa, Sod1, C3, and Msr1. These findings indicate that outcomes of studies utilizing PMJ2-R cells as a model of peritoneal macrophages should be carefully validated. All MS data are deposited in ProteomeXchange with the identifier PXD022133.
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Affiliation(s)
- Alexander L. Rusanov
- V. N. Orekhovich Research Institute of Biomedical Chemistry, Pogodinskaja Str. 10, 119121 Moscow, Russia; (P.M.K.); (O.V.T.); (V.G.Z.); (D.S.L.); (N.G.L.)
| | - Peter M. Kozhin
- V. N. Orekhovich Research Institute of Biomedical Chemistry, Pogodinskaja Str. 10, 119121 Moscow, Russia; (P.M.K.); (O.V.T.); (V.G.Z.); (D.S.L.); (N.G.L.)
| | - Olga V. Tikhonova
- V. N. Orekhovich Research Institute of Biomedical Chemistry, Pogodinskaja Str. 10, 119121 Moscow, Russia; (P.M.K.); (O.V.T.); (V.G.Z.); (D.S.L.); (N.G.L.)
| | - Victor G. Zgoda
- V. N. Orekhovich Research Institute of Biomedical Chemistry, Pogodinskaja Str. 10, 119121 Moscow, Russia; (P.M.K.); (O.V.T.); (V.G.Z.); (D.S.L.); (N.G.L.)
| | - Dmitry S. Loginov
- V. N. Orekhovich Research Institute of Biomedical Chemistry, Pogodinskaja Str. 10, 119121 Moscow, Russia; (P.M.K.); (O.V.T.); (V.G.Z.); (D.S.L.); (N.G.L.)
- Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic; (A.C.); (M.S.); (J.S.); (L.G.)
- BioCeV—Institute of Microbiology of the CAS, Prumyslova 595, 252 50 Vestec, Czech Republic
| | - Adéla Chlastáková
- Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic; (A.C.); (M.S.); (J.S.); (L.G.)
| | - Martin Selinger
- Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic; (A.C.); (M.S.); (J.S.); (L.G.)
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Jan Sterba
- Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic; (A.C.); (M.S.); (J.S.); (L.G.)
| | - Libor Grubhoffer
- Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic; (A.C.); (M.S.); (J.S.); (L.G.)
- Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Nataliya G. Luzgina
- V. N. Orekhovich Research Institute of Biomedical Chemistry, Pogodinskaja Str. 10, 119121 Moscow, Russia; (P.M.K.); (O.V.T.); (V.G.Z.); (D.S.L.); (N.G.L.)
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Mendoza-Mejía BD, Medina-Aparicio L, Serrano-Fujarte I, Vázquez A, Calva E, Hernández-Lucas I. Salmonella enterica serovar Typhi genomic regions involved in low pH resistance and in invasion and replication in human macrophages. ANN MICROBIOL 2021. [DOI: 10.1186/s13213-021-01629-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Purpose
Salmonella enterica serovar Typhi, the etiological agent of typhoid fever, causes a systemic life-threatening disease. To carry out a successful infection process, this bacterium needs to survive alkaline and acid pH conditions presented in the mouth, stomach, small intestine, and gallbladder. Therefore, in this work, a genetic screening to identify S. Typhi genes involved in acid and circumneutral pH resistance was performed.
Methods
A collection of S. Typhi mutants deleted of fragments ranging from 6 to 80 kb were obtained by the Datsenko and Wanner method. Bacterial growth rate assays of each mutant were performed to identify S. Typhi genes involved in circumneutral and acid pH resistance. S. Typhi mutants deficient to growth at specific pH were evaluated in their capacity to invade and replicate in phagocytic cells.
Results
In this work, it is reported that S. Typhi ∆F4 (pH 4.5), S. Typhi ∆F44 (pH 4.5, 5.5, and 6.5), and S. Typhi ∆F73 (pH 4.5, 5.5, 6.5, and 7.5) were deficient to grow in the pH indicated. These three mutant strains were also affected in their ability to invade and replicate in human macrophages.
Conclusions
S. Typhi contains defined genomic regions that influence the survival at specific pH values, as well as the invasion and replication inside human cells. Thus, this genetic information probably allows the bacteria to survive in different human compartments for an efficient infection cycle.
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Ulfig A, Bader V, Varatnitskaya M, Lupilov N, Winklhofer KF, Leichert LI. Hypochlorous acid-modified human serum albumin suppresses MHC class II - dependent antigen presentation in pro-inflammatory macrophages. Redox Biol 2021; 43:101981. [PMID: 33940547 PMCID: PMC8105673 DOI: 10.1016/j.redox.2021.101981] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 04/13/2021] [Accepted: 04/15/2021] [Indexed: 12/14/2022] Open
Abstract
Macrophages are innate immune cells that internalize and present exogenous antigens to T cells via MHC class II proteins. They operate at sites of infection in a highly inflammatory environment, generated in part by reactive oxygen species, in particular the strong oxidant hypochlorous acid (HOCl) produced in the neutrophil respiratory burst. HOCl effectively kills a broad range of pathogens but can also contribute to host tissue damage at sites of inflammation. To prevent tissue injury, HOCl is scavenged by human serum albumin (HSA) and other plasma proteins in interstitial fluids, leading to the formation of variously modified advanced oxidation products (AOPPs) with pro-inflammatory properties. Previously, we showed that HOCl-mediated N-chlorination converts HSA and other plasma proteins into efficient activators of the phagocyte respiratory burst, but the role of these AOPPs in antigen presentation by macrophages remained unclear. Here, we show that physiologically relevant amounts of N-chlorinated HSA can strongly impair the capacity of THP-1-derived macrophages to present antigens to antigen-specific T cells via MHC class II proteins at multiple stages. Initially, N-chlorinated HSA inhibits antigen internalization by converting antigens into scavenger receptor (SR) ligands and competing with the modified antigens for binding to SR CD36. Later steps of antigen presentation, such as intracellular antigen processing and MHC class II expression are negatively affected, as well. We propose that impaired processing of pathogens or exogenous antigens by immune cells at an initial stage of infection prevents antigen presentation in an environment potentially hostile to cells of the adaptive immune response, possibly shifting it towards locations removed from the actual insult, like the lymph nodes. On the flip side, excessive retardation or complete inhibition of antigen presentation by N-chlorinated plasma proteins could contribute to chronic infection and inflammation.
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Affiliation(s)
- Agnes Ulfig
- Ruhr University Bochum, Institute of Biochemistry and Pathobiochemistry - Microbial Biochemistry, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Verian Bader
- Ruhr University Bochum, Institute of Biochemistry and Pathobiochemistry - Molecular Cell Biology, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Marharyta Varatnitskaya
- Ruhr University Bochum, Institute of Biochemistry and Pathobiochemistry - Microbial Biochemistry, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Natalie Lupilov
- Ruhr University Bochum, Institute of Biochemistry and Pathobiochemistry - Microbial Biochemistry, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Konstanze F Winklhofer
- Ruhr University Bochum, Institute of Biochemistry and Pathobiochemistry - Molecular Cell Biology, Universitätsstrasse 150, 44780, Bochum, Germany
| | - Lars I Leichert
- Ruhr University Bochum, Institute of Biochemistry and Pathobiochemistry - Microbial Biochemistry, Universitätsstrasse 150, 44780, Bochum, Germany.
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Hashimoto R, Kakigi R, Miyamoto Y, Nakamura K, Itoh S, Daida H, Okada T, Katoh Y. JAK-STAT-dependent regulation of scavenger receptors in LPS-activated murine macrophages. Eur J Pharmacol 2020; 871:172940. [PMID: 31968212 DOI: 10.1016/j.ejphar.2020.172940] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 12/23/2019] [Accepted: 01/17/2020] [Indexed: 12/17/2022]
Abstract
In atherosclerosis progression, atherosclerotic plaques develop upon accumulated foam cells derived from macrophages that take up modified low-density lipoprotein (LDL). CD36 and CD204 are the principal scavenger receptors responsible for the uptake of modified LDL. Lipopolysaccharide (LPS) exacerbates atherosclerosis by enhancing the expression of scavenger receptors and thus increasing the uptake of modified LDL into macrophages. However, the signaling pathways that mediate LPS and scavenger receptor expression have not been fully elucidated. We used mouse bone marrow-derived macrophages and investigated the effects of LPS in vitro. LPS enhanced the phosphorylation of extracellular signal-regulated kinase (ERK) and signal transducer and activator of transcription-1 (STAT-1). Inhibitors of the mitogen-activated protein kinase (MAPK)/ERK kinase (MEK) pathway (U0126 and PD0325901) suppressed the uptake of acetylated-LDL (Ac-LDL) and the expression of CD204 but not CD36 in LPS-activated macrophages. Inhibitors of the Janus tyrosine kinase (JAK)-STAT pathway (ruxolitinib and tofacitinib) suppressed the uptake of Ac-LDL and the expression of both CD36 and CD204 in LPS-activated macrophages. We next injected LPS into the peritoneal cavity of mice and analyzed the effects of LPS. MEK inhibitor U0126 suppressed the uptake of Ac-LDL and the expression of CD204 but not CD36 in LPS-activated macrophages. JAK inhibitor ruxolitinib suppressed the uptake of Ac-LDL and the expression of both CD36 and CD204 in LPS-activated macrophages. These results suggest that scavenger receptors in LPS-activated mouse macrophages are regulated through a JAK-STAT-dependent pathway. Although further evaluation is necessary, JAK-STAT inhibition could be useful in atherosclerosis therapy, at least for atherosclerosis exacerbated by LPS.
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Affiliation(s)
- Ryota Hashimoto
- Laboratory of Molecular and Biochemical Research, Research Support Center, Juntendo University Graduate School of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo, 113-8421, Japan; Department of Physiology, Juntendo University Faculty of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo, 113-8421, Japan.
| | - Ryo Kakigi
- Department of Management Science, Josai International University, 1 Gumyo, Togane, Chiba, 283-8555, Japan
| | - Yuki Miyamoto
- Department of Cardiology, Juntendo University Graduate School of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Kyoko Nakamura
- Department of Physiology, Juntendo University Faculty of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Seigo Itoh
- Department of Cardiology, Juntendo University Graduate School of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Hiroyuki Daida
- Department of Cardiology, Juntendo University Graduate School of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Takao Okada
- Department of Physiology, Juntendo University Faculty of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo, 113-8421, Japan
| | - Youichi Katoh
- Department of Cardiology, Juntendo University Graduate School of Medicine, Hongo 2-1-1, Bunkyo-ku, Tokyo, 113-8421, Japan; Juntendo University Faculty of International Liberal Arts, Hongo 2-1-1, Bunkyo-ku, Tokyo, 112-8421, Japan.
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Kuroda C, Ueda K, Haniu H, Ishida H, Okano S, Takizawa T, Sobajima A, Kamanaka T, Yoshida K, Okamoto M, Tsukahara T, Matsuda Y, Aoki K, Kato H, Saito N. Different aggregation and shape characteristics of carbon materials affect biological responses in RAW264 cells. Int J Nanomedicine 2018; 13:6079-6088. [PMID: 30323595 PMCID: PMC6179726 DOI: 10.2147/ijn.s172493] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Introduction Carbon nanotubes (CNTs) have various shapes, including needle-like shapes and curled shapes, and the cytotoxicity and carcinogenicity of CNTs differ depending on their shapes and surface modifications. However, the biological responses induced by CNTs and related mechanisms according to the dispersion state of CNTs have not been extensively studied. Materials and methods We prepared multiwalled CNTs (MWCNTs) showing different dispersions and evaluated these MWCNTs in RAW264 cells to determine cytotoxicity, cellular uptake, and immune responses. Furthermore, RAW264 cells were also used to compare the cellular uptake and cytotoxicity of fibrous MWCNTs and spherical carbon nanohorns (CNHs) exhibiting the same degree of dispersion. Results Our analysis showed that the cellular uptake, localization, and inflammatory responses of MWCNTs differed depending on the dispersion state. Moreover, there were differences in uptake between MWCNTs and CNHs, even showing the same degree of dispersion. These findings suggested that receptors related to cytotoxicity and immune responses differed depending on the aggregated state of MWCNTs and surface modification with a dispersant. Furthermore, our results suggested that the receptors recognized by the cells differed depending on the particle shape. Conclusion Therefore, to apply MWCNTs as a biomaterial, it is important to determine the carcinogenicity and toxicity of the CNTs and to examine different biological responses induced by varying shapes, dispersion states, and surface modifications of particles.
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Affiliation(s)
- Chika Kuroda
- Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, Asahi, Matsumoto, Nagano, Japan, .,Department of Orthopaedic Surgery, Graduate School of Medicine, Shinshu University, Asahi, Matsumoto, Nagano, Japan
| | - Katsuya Ueda
- Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, Asahi, Matsumoto, Nagano, Japan, .,Department of Biomedical Engineering, Graduate School of Science and Technology, Shinshu University, Asahi, Matsumoto, Nagano, Japan,
| | - Hisao Haniu
- Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, Asahi, Matsumoto, Nagano, Japan, .,Department of Biomedical Engineering, Graduate School of Science and Technology, Shinshu University, Asahi, Matsumoto, Nagano, Japan, .,Department of Biomedical Engineering, Graduate School of Medicine, Science and Technology, Shinshu University, Asahi, Matsumoto, Nagano, Japan, .,Department of Orthopaedic Surgery, Shinshu University School of Medicine, Asahi, Matsumoto, Nagano, Japan,
| | - Haruka Ishida
- Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, Asahi, Matsumoto, Nagano, Japan, .,Department of Biomedical Engineering, Graduate School of Medicine, Science and Technology, Shinshu University, Asahi, Matsumoto, Nagano, Japan,
| | - Satomi Okano
- Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, Asahi, Matsumoto, Nagano, Japan, .,Department of Biomedical Engineering, Graduate School of Medicine, Science and Technology, Shinshu University, Asahi, Matsumoto, Nagano, Japan,
| | - Takashi Takizawa
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Asahi, Matsumoto, Nagano, Japan,
| | - Atsushi Sobajima
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Asahi, Matsumoto, Nagano, Japan,
| | - Takayuki Kamanaka
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Asahi, Matsumoto, Nagano, Japan,
| | - Kazushige Yoshida
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Asahi, Matsumoto, Nagano, Japan,
| | - Masanori Okamoto
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Asahi, Matsumoto, Nagano, Japan,
| | - Tamotsu Tsukahara
- Department of Molecular Pharmacology and Neuroscience, Nagasaki University Graduate School of Biomedical Sciences, Bunkyo-machi, Nagasaki, Japan
| | - Yoshikazu Matsuda
- Clinical Pharmacology Educational Center, Nihon Pharmaceutical University, Komuro, Ina-machi, Saitama, Japan
| | - Kaoru Aoki
- Physical Therapy Division, School of Health Sciences, Shinshu University, Asahi, Matsumoto, Nagano, Japan
| | - Hiroyuki Kato
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Asahi, Matsumoto, Nagano, Japan,
| | - Naoto Saito
- Institute for Biomedical Sciences, Interdisciplinary Cluster for Cutting Edge Research, Shinshu University, Asahi, Matsumoto, Nagano, Japan, .,Department of Biomedical Engineering, Graduate School of Science and Technology, Shinshu University, Asahi, Matsumoto, Nagano, Japan, .,Department of Biomedical Engineering, Graduate School of Medicine, Science and Technology, Shinshu University, Asahi, Matsumoto, Nagano, Japan, .,Department of Orthopaedic Surgery, Shinshu University School of Medicine, Asahi, Matsumoto, Nagano, Japan,
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11
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PRR Function of Innate Immune Receptors in Recognition of Bacteria or Bacterial Ligands. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1112:255-280. [DOI: 10.1007/978-981-13-3065-0_18] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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12
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Cheng Y, Li Y, Ma C, Song Y, Xu H, Yu H, Xu S, Mu Q, Li H, Chen Y, Zhao G. Arsenic trioxide inhibits glioma cell growth through induction of telomerase displacement and telomere dysfunction. Oncotarget 2017; 7:12682-92. [PMID: 26871293 PMCID: PMC4914314 DOI: 10.18632/oncotarget.7259] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 01/24/2016] [Indexed: 12/22/2022] Open
Abstract
Glioblastomas are resistant to many kinds of treatment, including chemotherapy, radiation and other adjuvant therapies. As2O3 reportedly induces ROS generation in cells, suggesting it may be able to induce telomerase suppression and telomere dysfunction in glioblastoma cells. We show here that As2O3 induces ROS generation as well as telomerase phosphorylation in U87, U251, SHG4 and C6 glioma cells. It also induces translocation of telomerase from the nucleus to the cytoplasm, thereby decreasing total telomerase activity. These effects of As2O3 trigger an extensive DNA damage response at the telomere, which includes up-regulation of ATM, ATR, 53BP1, γ-H2AX and Mer11, in parallel with telomere fusion and 3′-overhang degradation. This ultimately results in induction of p53- and p21-mediated cell apoptosis, G2/M cell cycle arrest and cellular senescence. These results provide new insight into the antitumor effects of As2O3 and can perhaps contribute to solving the problem of glioblastoma treatment resistance.
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Affiliation(s)
- Ye Cheng
- Department of Neurosurgery, First Hospital of Jilin University, Changchun, P. R. China
| | - Yunqian Li
- Department of Neurosurgery, First Hospital of Jilin University, Changchun, P. R. China
| | - Chengyuan Ma
- Department of Neurosurgery, First Hospital of Jilin University, Changchun, P. R. China
| | - Yang Song
- Department of Neurosurgery, First Hospital of Jilin University, Changchun, P. R. China
| | - Haiyang Xu
- Department of Neurosurgery, First Hospital of Jilin University, Changchun, P. R. China
| | - Hongquan Yu
- Department of Neurosurgery, First Hospital of Jilin University, Changchun, P. R. China
| | - Songbai Xu
- Department of Neurosurgery, First Hospital of Jilin University, Changchun, P. R. China
| | - Qingchun Mu
- Department of Neurosurgery, First Hospital of Jilin University, Changchun, P. R. China
| | - Haisong Li
- Department of Neurosurgery, First Hospital of Jilin University, Changchun, P. R. China
| | - Yong Chen
- Department of Neurosurgery, First Hospital of Jilin University, Changchun, P. R. China
| | - Gang Zhao
- Department of Neurosurgery, First Hospital of Jilin University, Changchun, P. R. China
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13
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Wu C, Liu C, Luo K, Li Y, Jiang J, Yan F. Changes in Expression of the Membrane Receptors CD14, MHC-II, SR-A, and TLR4 in Tissue-Specific Monocytes/Macrophages Following Porphyromonas gingivalis–LPS Stimulation. Inflammation 2017; 41:418-431. [DOI: 10.1007/s10753-017-0698-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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14
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Hashimoto R, Kakigi R, Nakamura K, Itoh S, Daida H, Okada T, Katoh Y. LPS enhances expression of CD204 through the MAPK/ERK pathway in murine bone marrow macrophages. Atherosclerosis 2017; 266:167-175. [DOI: 10.1016/j.atherosclerosis.2017.10.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 09/09/2017] [Accepted: 10/05/2017] [Indexed: 01/08/2023]
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15
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Liu Z, Zhu H, Dai X, Wang C, Ding Y, Song P, Zou MH. Macrophage Liver Kinase B1 Inhibits Foam Cell Formation and Atherosclerosis. Circ Res 2017; 121:1047-1057. [PMID: 28827412 PMCID: PMC5640502 DOI: 10.1161/circresaha.117.311546] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 08/13/2017] [Accepted: 08/21/2017] [Indexed: 01/01/2023]
Abstract
RATIONALE LKB1 (liver kinase B1) is a serine/threonine kinase and tumor suppressor, which regulates the homeostasis of hematopoietic cells and immune responses. Macrophages transform into foam cells upon taking-in lipids. No role for LKB1 in foam cell formation has previously been reported. OBJECTIVE We sought to establish the role of LKB1 in atherosclerotic foam cell formation. METHODS AND RESULTS LKB1 expression was examined in human carotid atherosclerotic plaques and in western diet-fed atherosclerosis-prone Ldlr-/- and ApoE-/- mice. LKB1 expression was markedly reduced in human plaques when compared with nonatherosclerotic vessels. Consistently, time-dependent reduction of LKB1 levels occurred in atherosclerotic lesions in western diet-fed Ldlr-/- and ApoE-/- mice. Exposure of macrophages to oxidized low-density lipoprotein downregulated LKB1 in vitro. Furthermore, LKB1 deficiency in macrophages significantly increased the expression of SRA (scavenger receptor A), modified low-density lipoprotein uptake and foam cell formation, all of which were abolished by blocking SRA. Further, we found LKB1 phosphorylates SRA resulting in its lysosome degradation. To further investigate the role of macrophage LKB1 in vivo, ApoE-/-LKB1fl/flLysMcre and ApoE-/-LKB1fl/fl mice were fed with western diet for 16 weeks. Compared with ApoE-/-LKB1fl/fl wild-type control, ApoE-/-LKB1fl/flLysMcre mice developed more atherosclerotic lesions in whole aorta and aortic root area, with markedly increased SRA expression in aortic root lesions. CONCLUSIONS We conclude that macrophage LKB1 reduction caused by oxidized low-density lipoprotein promotes foam cell formation and the progression of atherosclerosis.
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Affiliation(s)
- Zhaoyu Liu
- From the Center for Molecular and Translational Medicine, Georgia State University, Atlanta
| | - Huaiping Zhu
- From the Center for Molecular and Translational Medicine, Georgia State University, Atlanta
| | - Xiaoyan Dai
- From the Center for Molecular and Translational Medicine, Georgia State University, Atlanta
| | - Cheng Wang
- From the Center for Molecular and Translational Medicine, Georgia State University, Atlanta
| | - Ye Ding
- From the Center for Molecular and Translational Medicine, Georgia State University, Atlanta
| | - Ping Song
- From the Center for Molecular and Translational Medicine, Georgia State University, Atlanta
| | - Ming-Hui Zou
- From the Center for Molecular and Translational Medicine, Georgia State University, Atlanta.
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16
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Dextran sulfate nanoparticles as a theranostic nanomedicine for rheumatoid arthritis. Biomaterials 2017; 131:15-26. [DOI: 10.1016/j.biomaterials.2017.03.044] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Revised: 03/24/2017] [Accepted: 03/25/2017] [Indexed: 11/23/2022]
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17
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Yi BG, Park OK, Jeong MS, Kwon SH, Jung JI, Lee S, Ryoo S, Kim SE, Kim JW, Moon WJ, Park K. In vitro photodynamic effects of scavenger receptor targeted-photoactivatable nanoagents on activated macrophages. Int J Biol Macromol 2017; 97:181-189. [DOI: 10.1016/j.ijbiomac.2017.01.037] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Revised: 12/25/2016] [Accepted: 01/09/2017] [Indexed: 12/14/2022]
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18
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Sapkota M, Kharbanda KK, Wyatt TA. Malondialdehyde-Acetaldehyde-Adducted Surfactant Protein Alters Macrophage Functions Through Scavenger Receptor A. Alcohol Clin Exp Res 2016; 40:2563-2572. [PMID: 27783409 PMCID: PMC5133169 DOI: 10.1111/acer.13248] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Accepted: 09/20/2016] [Indexed: 11/26/2022]
Abstract
BACKGROUND Reactive aldehydes such as acetaldehyde and malondialdehyde generated as a result of alcohol metabolism and cigarette smoke exposure lead to the formation of malondialdehyde-acetaldehyde-adducted proteins (MAA adducts). These aldehydes can adduct to different proteins such as bovine serum albumin and surfactant protein A or surfactant protein D (SPD). Macrophages play an important role in innate immunity, but the effect of MAA adducts on macrophage function has not yet been examined. Because macrophage scavenger receptor A (SRA; CD204) mediates the uptake of modified proteins, we hypothesized that the effects of MAA-modified proteins on macrophage function are primarily mediated through SRA. METHODS We tested this hypothesis by exposing SPD-MAA to macrophages and measuring functions. SPD-MAA treatment significantly stimulated pro-inflammatory cytokine tumor necrosis factor-alpha (TNF-α) release in the macrophage cell line, RAW 264.7. RESULTS A significant reduction in phagocytosis of zymosan particles was also observed. SPD-MAA stimulated a significant dose-dependent increase in TNF-α and interleukin (IL)-6 release from peritoneal macrophages (PMs) of wild-type (WT) mice. But significantly less TNF-α and IL-6 were released from PMs of SRA-/- mice. We observed a significant reduction in phagocytosis of zymosan particles in PMs from WT mice treated with SPD-MAA. No further SPD-MAA-induced reduction was seen in PMs from SRA-/- mice. SPD-MAA treatment significantly increased SRA mRNA expression, but had no effect on surface receptor protein expression. Protein kinase C alpha inhibitor and NF-κB inhibitor significantly reduced pro-inflammatory cytokine release in response to SPD-MAA. CONCLUSIONS In conclusion, our data demonstrate that SRA is important for MAA-adducted protein-mediated effect on macrophage functions.
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Affiliation(s)
- Muna Sapkota
- Department of Environmental, Agricultural and Occupational Health, College of Public Health, University of Nebraska Medical Center, Omaha, NE, USA
| | | | - Todd A. Wyatt
- Department of Environmental, Agricultural and Occupational Health, College of Public Health, University of Nebraska Medical Center, Omaha, NE, USA
- Department of Internal Medicine, Division of Pulmonary, Critical Care, Sleep and Allergy University of Nebraska Medical Center, Omaha, NE, USA
- VA Nebraska-Western Iowa Health Care System, Omaha, NE, USA
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19
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Silva RA, Giordano RJ, Gutierrez PS, Rocha VZ, Rudnicki M, Kee P, Abdalla DSP, Puech-Leão P, Caramelli B, Arap W, Pasqualini R, Meneghetti JC, Marques FLN, Khoobchandani M, Katti KV, Lugão AB, Kalil J. CTHRSSVVC Peptide as a Possible Early Molecular Imaging Target for Atherosclerosis. Int J Mol Sci 2016; 17:ijms17091383. [PMID: 27563889 PMCID: PMC5037663 DOI: 10.3390/ijms17091383] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 08/16/2016] [Accepted: 08/16/2016] [Indexed: 11/16/2022] Open
Abstract
The purpose of our work was to select phages displaying peptides capable of binding to vascular markers present in human atheroma, and validate their capacity to target the vascular markers in vitro and in low-density lipoprotein receptor knockout (LDLr(-/-)) mouse model of atherosclerosis. By peptide fingerprinting on human atherosclerotic tissues, we selected and isolated four different peptides sequences, which bind to atherosclerotic lesions and share significant similarity to known human proteins with prominent roles in atherosclerosis. The CTHRSSVVC-phage peptide displayed the strongest reactivity with human carotid atherosclerotic lesions (p < 0.05), when compared to tissues from normal carotid arteries. This peptide sequence shares similarity to a sequence present in the fifth scavenger receptor cysteine-rich (SRCR) domain of CD163, which appeared to bind to CD163, and subsequently, was internalized by macrophages. Moreover, the CTHRSSVVC-phage targets atherosclerotic lesions of a low-density lipoprotein receptor knockout (LDLr(-/-)) mouse model of atherosclerosis in vivo to High-Fat diet group versus Control group. Tetraazacyclododecane-1,4,7,10-tetraacetic acid-CTHRSSVVC peptide (DOTA-CTHRSSVVC) was synthesized and labeled with (111)InCl₃ in >95% yield as determined by high performance liquid chromatography (HPLC), to validate the binding of the peptide in atherosclerotic plaque specimens. The results supported our hypothesis that CTHRSSVVC peptide has a remarkable sequence for the development of theranostics approaches in the treatment of atherosclerosis and other diseases.
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Affiliation(s)
- Rosemeire A Silva
- Laboratory of Immunology, Heart Institute (InCor), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo 05403-000, Brazil.
| | - Ricardo J Giordano
- Chemistry Institute, Biochemistry Department, University of Sao Paulo, Sao Paulo 05508-000, Brazil.
| | - Paulo S Gutierrez
- Laboratory of Pathology, Heart Institute (InCor), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo 05403-000, Brazil.
| | - Viviane Z Rocha
- Clinical Division, Heart Institute (InCor), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo 05403-000, Brazil.
| | - Martina Rudnicki
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Sciences University of São Paulo, São Paulo 05508-000, Brazil.
| | - Patrick Kee
- Division of Cardiology, Department of Internal Medicine, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA.
| | - Dulcinéia S P Abdalla
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Sciences University of São Paulo, São Paulo 05508-000, Brazil.
| | - Pedro Puech-Leão
- Division of Vascular and Endovascular Surgery, University of São Paulo Medical School, São Paulo 05403-000, Brazil.
| | - Bruno Caramelli
- Clinical Division, Heart Institute (InCor), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo 05403-000, Brazil.
| | - Wadih Arap
- University of New Mexico Comprehensive Cancer Center, Division of Hematology/Oncology and Division of Molecular Medicine, Department of Internal Medicine, University of New Mexico School of Medicine Albuquerque, NM 87131, USA.
| | - Renata Pasqualini
- University of New Mexico Comprehensive Cancer Center, Division of Hematology/Oncology and Division of Molecular Medicine, Department of Internal Medicine, University of New Mexico School of Medicine Albuquerque, NM 87131, USA.
| | - José C Meneghetti
- Medicine Nuclear Service and Molecular Image, Heart Institute (InCor), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo 05403-000, Brazil.
| | - Fabio L N Marques
- Departamento de Radiologia e Oncologia, Faculdade de Medicina da Universidade de São Paulo (LIM43), São Paulo 05403-911, Brazil.
| | - Menka Khoobchandani
- Institute of Green Nanotechnology, Department of Radiology and Chemistry, University of Missouri, Columbia, MO 65211, USA.
| | - Kattesh V Katti
- Institute of Green Nanotechnology, Department of Radiology and Chemistry, University of Missouri, Columbia, MO 65211, USA.
| | - Ademar B Lugão
- Nuclear and Energy Research Institute-IPEN/CNEN/São Paulo 05508-000, Brazil.
| | - Jorge Kalil
- Laboratory of Immunology, Heart Institute (InCor), Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo 05403-000, Brazil.
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Scavenger receptor class-A plays diverse role in innate immunity, cell signaling and different pathologies. ASIAN PACIFIC JOURNAL OF TROPICAL DISEASE 2016. [DOI: 10.1016/s2222-1808(16)61088-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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21
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Chatrath S, Gupta VK, Dixit A, Garg LC. PE_PGRS30 of Mycobacterium tuberculosis mediates suppression of proinflammatory immune response in macrophages through its PGRS and PE domains. Microbes Infect 2016; 18:536-42. [PMID: 27129781 DOI: 10.1016/j.micinf.2016.04.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 04/15/2016] [Accepted: 04/18/2016] [Indexed: 11/25/2022]
Abstract
The success of Mycobacterium tuberculosis as a pathogen relies on its ability to survive inside macrophages and evade host immune mechanisms. M. tuberculosis employs multiple strategies to confer resistance against immune system including inhibition of phago-lysosomal fusion, modulation of cytokine responses and granuloma formation. PE_PGRS proteins, uniquely present in pathogenic mycobacteria, are cell surface molecules that are suggested to interact with host cells. PE_PGRS proteins have also been implicated in its pathogenesis. In the present study, immuno-regulatory property of Rv1651c-encoded PE_PGRS30 protein was explored. Infection of PMA-differentiated human THP-1 macrophages with Mycobacterium smegmatis harbouring pVV(1651c) resulted in reduced production of IL-12, TNF-α and IL-6, as compared to infection with M. smegmatis harbouring the control plasmid pVV16. No differential effect was observed on bacterial persistence inside macrophages or on macrophage mortality upon infection with the two recombinant strains. Infection of THP-1 macrophages with recombinant M. smegmatis expressing deletion variants of PE_PGRS30 indicated that anti-inflammatory function of the protein is possessed by its PGRS and PE domains while the C-terminal domain, when expressed alone, displayed antagonistic effect in terms of TNF-α secretion. These results suggest that PE_PGRS30 interferes with macrophage immune functions important for activation of adaptive T-cell responses.
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Affiliation(s)
- Shweta Chatrath
- Gene Regulation Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Vineet Kumar Gupta
- Gene Regulation Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - Aparna Dixit
- Gene Regulation Laboratory, School of Biotechnology, Jawaharlal Nehru University, New Delhi 110067, India
| | - Lalit C Garg
- Gene Regulation Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi 110067, India.
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Zou J, Shankar N. Roles of TLR/MyD88/MAPK/NF-κB Signaling Pathways in the Regulation of Phagocytosis and Proinflammatory Cytokine Expression in Response to E. faecalis Infection. PLoS One 2015; 10:e0136947. [PMID: 26317438 PMCID: PMC4552673 DOI: 10.1371/journal.pone.0136947] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 08/11/2015] [Indexed: 12/22/2022] Open
Abstract
Enterococcus faecalis is a commensal bacterium residing in the gastrointestinal tract of mammals, but in certain situations it is also an opportunistic pathogen which can cause serious disease. Macrophages have been shown to play a critical role in controlling infections by commensal enterococci and also have an important role in mediating chromosomal instability and promoting colon cancer during high-level enterococcal colonization in genetically susceptible mice. However, the molecular mechanisms involved in the interaction of macrophages with enterococci during infection are not fully understood. In this study, using BMDM and RAW264.7 macrophages we show that enterococcal infection activates ERK, JNK and p38 MAPK as well as NF-κB, and drives polarization of macrophages towards the M1 phenotype. Inhibition of NF-κB activation significantly reduced the expression of TNF-α and IL-1β, as did the inhibition of ERK, JNK and p38 MAPK, although to differing extent. Enterococci-induced activation of these pathways and subsequent cytokine expression was contact dependent, modest compared to activation by E. coli and, required the adaptor protein MyD88. Phagocytosis of enterococci by macrophages was enhanced by preopsonization with E. faecalis antiserum and involved the ERK and JNK signaling pathways, with the adaptor protein MyD88 as an important mediator. This study of the interaction of macrophages with enterococci could provide a foundation for studying the pathogenesis of infection by this opportunistic pathogen and to developing new therapeutic approaches to combat enterococcal infection.
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Affiliation(s)
- Jun Zou
- Department of Pharmaceutical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, United States of America
| | - Nathan Shankar
- Department of Pharmaceutical Sciences, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, United States of America
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Turmerone enriched standardized Curcuma longa extract alleviates LPS induced inflammation and cytokine production by regulating TLR4–IRAK1–ROS–MAPK–NFκB axis. J Funct Foods 2015. [DOI: 10.1016/j.jff.2015.04.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
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Selvarajan K, Narasimhulu CA, Bapputty R, Parthasarathy S. Anti-inflammatory and antioxidant activities of the nonlipid (aqueous) components of sesame oil: potential use in atherosclerosis. J Med Food 2015; 18:393-402. [PMID: 25692333 DOI: 10.1089/jmf.2014.0139] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Dietary intervention to prevent inflammation and atherosclerosis has been a major focus in recent years. We previously reported that sesame oil (SO) was effective in inhibiting atherosclerosis in low-density lipoprotein-receptor negative mice. We also noted that the levels of many proinflammatory markers were lower in the SO-treated animals. In this study we tested whether the non-lipid, aqueous components associated with SO would have anti-inflammatory and antioxidant effects. Polymerase chain reaction array data indicated that sesame oil aqueous extract (SOAE) was effective in reducing lipopolysaccharide (LPS)-induced inflammation in RAW 264.7 macrophage cells. Expression of inflammatory cytokines such as interleukin (IL)-1α, IL-6, and tumor necrosis factor α (TNF-α) was also analyzed independently in cells pretreated with SOAE followed by inflammatory assault. Effect of SOAE on TNF-α-induced MCP-1 and VCAM1 expression was also tested in human umbilical vein endothelial cells. We observed that SOAE significantly reduced inflammatory markers in both macrophages and endothelial cells in a concentration-dependent manner. SOAE was also effective in inhibiting LPS-induced TNF-α and IL-6 levels in vivo at different concentrations. We also noted that in the presence of SOAE, transcription and translocation of NF-kappaB was suppressed. SOAE was also effective in inhibiting oxidation of lipoproteins in vitro. These results suggest the presence of potent anti-inflammatory and antioxidant compounds in SOAE. Furthermore, SOAE differentially regulated expression of scavenger receptors and increased ATP-binding cassette A1 (ABCA1) mRNA expression by activating liver X receptors (LXRs), suggesting additional effects on lipid metabolism. Thus, SOAE appears multipotent and may serve as a valuable nonpharmacological agent in atherosclerosis and other inflammatory diseases.
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Affiliation(s)
- Krithika Selvarajan
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida , Orlando, Florida
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Anselmo AC, Gilbert JB, Kumar S, Gupta V, Cohen RE, Rubner MF, Mitragotri S. Monocyte-mediated delivery of polymeric backpacks to inflamed tissues: a generalized strategy to deliver drugs to treat inflammation. J Control Release 2014; 199:29-36. [PMID: 25481443 DOI: 10.1016/j.jconrel.2014.11.027] [Citation(s) in RCA: 108] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 11/03/2014] [Accepted: 11/23/2014] [Indexed: 12/31/2022]
Abstract
Targeted delivery of drugs and imaging agents to inflamed tissues, as in the cases of cancer, Alzheimer's disease, Parkinson's disease, and arthritis, represents one of the major challenges in drug delivery. Monocytes possess a unique ability to target and penetrate into sites of inflammation. Here, we describe a broad approach to take advantage of the natural ability of monocytes to target and deliver flat polymeric particles ("Cellular Backpacks") to inflamed tissues. Cellular backpacks attach strongly to the surface of monocytes but do not undergo phagocytosis due to backpack's size, disk-like shape and flexibility. Following attachment of backpacks, monocytes retain important cellular functions including transmigration through an endothelial monolayer and differentiation into macrophages. In two separate in vivo inflammation models, backpack-laden monocytes exhibit increased targeting to inflamed tissues. Cellular backpacks, and their abilities to attach to monocytes without impairing monocyte functions and 'hitchhike' to a variety of inflamed tissues, offer a new platform for both cell-mediated therapies and broad targeting of inflamed tissues.
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Affiliation(s)
- Aaron C Anselmo
- Department of Chemical Engineering, Center for Bioengineering, University of California, Santa Barbara, CA 93106, United States
| | - Jonathan B Gilbert
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Sunny Kumar
- Department of Chemical Engineering, Center for Bioengineering, University of California, Santa Barbara, CA 93106, United States
| | - Vivek Gupta
- School of Pharmacy, Keck Graduate Institute, 535 Watson Dr., Claremont, CA 91711, United States
| | - Robert E Cohen
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Michael F Rubner
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
| | - Samir Mitragotri
- Department of Chemical Engineering, Center for Bioengineering, University of California, Santa Barbara, CA 93106, United States.
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26
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Hossain E, Ota A, Karnan S, Takahashi M, Mannan SB, Konishi H, Hosokawa Y. Lipopolysaccharide augments the uptake of oxidized LDL by up-regulating lectin-like oxidized LDL receptor-1 in macrophages. Mol Cell Biochem 2014; 400:29-40. [PMID: 25348362 DOI: 10.1007/s11010-014-2259-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 10/17/2014] [Indexed: 01/22/2023]
Abstract
There is a growing body of evidence supporting an intimate association of immune activation with the pathogenesis of cardiovascular diseases, including atherosclerosis. Uptake of oxidized low-density lipoprotein (oxLDL) through scavenging receptors promotes the formation of mature lipid-laden macrophages, which subsequently leads to exacerbation of regional inflammation and atherosclerotic plaque formation. In this study, we first examined changes in the mRNA level of the lectin-like oxLDL receptor-1 (LOX-1) in the mouse macrophage cell line RAW264.7 and the human PMA-induced macrophage cell line THP-1 after LPS stimulation. LPS significantly up-regulated LOX-1 mRNA in RAW264.7 cells; LOX-1 cell-surface protein expression was also increased. Flow cytometry and fluorescence microscopy analyses showed that cellular uptake of fluorescence (Dil)-labeled oxLDL was significantly augmented with LPS stimulation. The augmented uptake of Dil-oxLDL was almost completely abrogated by treatment with an anti-LOX-1 antibody. Of note, knockdown of Erk1/2 resulted in a significant reduction of LPS-induced LOX-1 up-regulation. Treatment with U0126, a specific inhibitor of MEK, significantly suppressed LPS-induced expression of LOX-1 at both the mRNA and protein levels. Furthermore, LOX-1 promoter activity was significantly augmented by LPS stimulation; this augmentation was prevented by U0126 treatment. Similar results were also observed in human PMA-induced THP-1 macrophages. Taken together, our results indicate that LPS up-regulates LOX-1, at least in part through activation of the Erk1/2 signaling pathway, followed by augmented cellular oxLDL uptake, thus highlighting a critical role of TLR4-mediated aberrant LOX-1 signaling in the pathogenesis of atherosclerosis.
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Affiliation(s)
- Ekhtear Hossain
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Aichi, Japan
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27
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Sharif O, Gawish R, Warszawska JM, Martins R, Lakovits K, Hladik A, Doninger B, Brunner J, Korosec A, Schwarzenbacher RE, Berg T, Kralovics R, Colinge J, Mesteri I, Gilfillan S, Salmaggi A, Verschoor A, Colonna M, Knapp S. The triggering receptor expressed on myeloid cells 2 inhibits complement component 1q effector mechanisms and exerts detrimental effects during pneumococcal pneumonia. PLoS Pathog 2014; 10:e1004167. [PMID: 24945405 PMCID: PMC4055749 DOI: 10.1371/journal.ppat.1004167] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Accepted: 04/07/2014] [Indexed: 11/18/2022] Open
Abstract
Phagocytosis and inflammation within the lungs is crucial for host defense during bacterial pneumonia. Triggering receptor expressed on myeloid cells (TREM)-2 was proposed to negatively regulate TLR-mediated responses and enhance phagocytosis by macrophages, but the role of TREM-2 in respiratory tract infections is unknown. Here, we established the presence of TREM-2 on alveolar macrophages (AM) and explored the function of TREM-2 in the innate immune response to pneumococcal infection in vivo. Unexpectedly, we found Trem-2(-/-) AM to display augmented bacterial phagocytosis in vitro and in vivo compared to WT AM. Mechanistically, we detected that in the absence of TREM-2, pulmonary macrophages selectively produced elevated complement component 1q (C1q) levels. We found that these increased C1q levels depended on peroxisome proliferator-activated receptor-δ (PPAR-δ) activity and were responsible for the enhanced phagocytosis of bacteria. Upon infection with S. pneumoniae, Trem-2(-/-) mice exhibited an augmented bacterial clearance from lungs, decreased bacteremia and improved survival compared to their WT counterparts. This work is the first to disclose a role for TREM-2 in clinically relevant respiratory tract infections and demonstrates a previously unknown link between TREM-2 and opsonin production within the lungs.
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MESH Headings
- Animals
- Apoptosis
- Cell Line, Transformed
- Cells, Cultured
- Complement C1q/genetics
- Complement C1q/metabolism
- Cytokines/metabolism
- Disease Models, Animal
- Female
- Lung/cytology
- Lung/immunology
- Lung/metabolism
- Lung/pathology
- Macrophages, Alveolar/immunology
- Macrophages, Alveolar/metabolism
- Macrophages, Alveolar/pathology
- Male
- Membrane Glycoproteins/genetics
- Membrane Glycoproteins/metabolism
- Mice, Inbred C57BL
- Mice, Knockout
- Neutrophil Infiltration
- PPAR gamma/metabolism
- Phagocytosis
- Pneumonia, Pneumococcal/immunology
- Pneumonia, Pneumococcal/metabolism
- Pneumonia, Pneumococcal/pathology
- Receptors, Immunologic/genetics
- Receptors, Immunologic/metabolism
- Respiratory Mucosa/cytology
- Respiratory Mucosa/immunology
- Respiratory Mucosa/metabolism
- Respiratory Mucosa/pathology
- Survival Analysis
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Affiliation(s)
- Omar Sharif
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
- * E-mail: (OS); (SK)
| | - Riem Gawish
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Joanna M. Warszawska
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Rui Martins
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Karin Lakovits
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Anastasiya Hladik
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Bianca Doninger
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Julia Brunner
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Ana Korosec
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Roland E. Schwarzenbacher
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
| | - Tiina Berg
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Robert Kralovics
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Jacques Colinge
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Ildiko Mesteri
- Department of Pathology, Medical University of Vienna, Vienna, Austria
| | - Susan Gilfillan
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Andrea Salmaggi
- Department of Clinical Neurosciences, Istituto Nazionale Neurologico Carlo Besta, Milano, Italy
| | - Admar Verschoor
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University Munich, Munich, Germany
| | - Marco Colonna
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, Missouri, United States of America
| | - Sylvia Knapp
- CeMM - Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
- Department of Medicine I, Laboratory of Infection Biology, Medical University of Vienna, Vienna, Austria
- * E-mail: (OS); (SK)
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28
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Erbel C, Tyka M, Helmes CM, Akhavanpoor M, Rupp G, Domschke G, Linden F, Wolf A, Doesch A, Lasitschka F, Katus HA, Gleissner CA. CXCL4-induced plaque macrophages can be specifically identified by co-expression of MMP7+S100A8+ in vitro and in vivo. Innate Immun 2014; 21:255-65. [PMID: 24663337 DOI: 10.1177/1753425914526461] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Macrophage heterogeneity in human atherosclerotic plaques has been recognized; however, markers for unequivocal identification of some subtypes are lacking. We found that the platelet chemokine CXCL4 induces a unique macrophage phenotype, which we proposed to call 'M4'. Here, we sought to identify suitable markers that identify M4 macrophages in vitro and in vivo. Using a stringent algorithm, we identified a set of potential markers from transcriptomic data derived from polarized macrophages. We specifically focused on matrix metalloproteinase (MMP)7 and S100A8, the co-expression of which has not been described in any macrophage type thus far. We found dose- and time-dependent MMP7 and S100A8 expression in M4 macrophages at the gene and protein levels. CXCL4-induced up-regulation of both MMP7 and S100A8 was curbed in the presence of heparin, which binds to CXCL4 and glycosaminoglycans, most likely representing the macrophage receptor for CXCL4. Immunofluorescence of post-mortem atherosclerotic coronary arteries identified CD68(+)MMP7(+), CD68(+)MMP7(-), CD68(+)S100A8(+) and CD68(+)S100A8(-) macrophages. A small proportion of MMP7(+)S100A8(+) macrophages most likely represent M4 macrophages. In summary, we have identified co-expression of MMP7 and S100A8 to be a marker combination exclusively found in M4 macrophages. This finding may allow further dissection of the role of M4 macrophages in atherosclerosis and other pathologic conditions.
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Affiliation(s)
- Christian Erbel
- Department of Cardiology, University of Heidelberg, Heidelberg, Germany
| | - Mirjam Tyka
- Department of Cardiology, University of Heidelberg, Heidelberg, Germany
| | | | | | - Gregor Rupp
- Department of Cardiology, University of Heidelberg, Heidelberg, Germany
| | - Gabriele Domschke
- Department of Cardiology, University of Heidelberg, Heidelberg, Germany
| | - Fabian Linden
- Department of Cardiology, University of Heidelberg, Heidelberg, Germany
| | - Antonia Wolf
- Department of Cardiology, University of Heidelberg, Heidelberg, Germany
| | - Andreas Doesch
- Department of Cardiology, University of Heidelberg, Heidelberg, Germany
| | - Felix Lasitschka
- Department of Pathology, University of Heidelberg, Heidelberg, Germany
| | - Hugo A Katus
- Department of Cardiology, University of Heidelberg, Heidelberg, Germany DZHK (German Centre for Cardiovascular Research), Heidelberg, Germany
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29
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Liu FF, Wu X, Zhang Y, Wang Y, Jiang F. TRAIL/DR5 signaling promotes macrophage foam cell formation by modulating scavenger receptor expression. PLoS One 2014; 9:e87059. [PMID: 24466325 PMCID: PMC3899365 DOI: 10.1371/journal.pone.0087059] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Accepted: 12/17/2013] [Indexed: 12/31/2022] Open
Abstract
Tumor necrosis factor-related apoptosis-inducing ligand (TRAIL/Apo2L) has been shown to have protective effects against atherosclerosis. However, whether TRAIL has any effects on expression of macrophage scavenger receptors and lipid uptake has not yet been studied. Macrophage lines RAW264.7 and THP-1, and mouse primary peritoneal macrophages, were cultured in vitro and treated with recombinant human TRAIL. Real-time PCR and western blot were performed to measure mRNA and protein expressions. Foam cell formation was assessed by internalization of acetylated and oxidized low-density lipoproteins (LDL). Apoptosis was measured by terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling. We found that TRAIL treatment increased expression of scavenger receptor (SR)-AI and SR-BI in a time- and dose-dependent manner, and this effect was accompanied by increased foam cell formation. These effects of TRAIL were abolished by a TRAIL neutralizing antibody or in DR5 receptor-deficient macrophages. The increased LDL uptake by TRAIL was blocked by SR-AI gene silencing or the SR-AI inhibitor poly(I:C), while SR-BI blockade with BLT-1 had no effect. TRAIL-induced SR-AI expression was blocked by the inhibitor of p38 mitogen-activated protein kinase, but not by inhibitors of ERK1/2 or JNK. TRAIL also induced apoptosis in macrophages. In contrast to macrophages, TRAIL showed little effects on SR expression or apoptosis in vascular smooth muscle cells. In conclusion, our results demonstrate that TRAIL promotes macrophage lipid uptake via SR-AI upregulation through activation of the p38 pathway.
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Affiliation(s)
- Fang Fang Liu
- Key Laboratory of Cardiovascular Remodeling and Function Research, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Xiao Wu
- Key Laboratory of Cardiovascular Remodeling and Function Research, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Yun Zhang
- Key Laboratory of Cardiovascular Remodeling and Function Research, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
| | - Yan Wang
- Department of Cardiology, Beijing Hospital, Beijing, China
- * E-mail: (FJ); (YW)
| | - Fan Jiang
- Key Laboratory of Cardiovascular Remodeling and Function Research, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
- * E-mail: (FJ); (YW)
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30
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Bode C, Diedrich B, Muenster S, Hentschel V, Weisheit C, Rommelsheim K, Hoeft A, Meyer R, Boehm O, Knuefermann P, Baumgarten G. Antibiotics regulate the immune response in both presence and absence of lipopolysaccharide through modulation of Toll-like receptors, cytokine production and phagocytosis in vitro. Int Immunopharmacol 2013; 18:27-34. [PMID: 24239744 DOI: 10.1016/j.intimp.2013.10.025] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2013] [Revised: 10/18/2013] [Accepted: 10/19/2013] [Indexed: 12/12/2022]
Abstract
The inflammatory response to pathogen-associated molecular patterns such as lipopolysaccharide (LPS) in sepsis is mediated via Toll-like receptors (TLRs). Since TLRs also trigger various immune functions, including phagocytosis, their modulation is a promising strategy in the treatment of sepsis. As antibiotics have immunomodulatory properties, this study examined the effect of commonly used classes of antibiotics on i) the expression of TLRs and cytokines and ii) the phagocytic activity under sepsis-like conditions in vitro. This was achieved by incubating THP-1 monocytes and peripheral blood mononuclear cells (PBMCs) obtained from patients after open-heart surgery with the addition of LPS and six key antibiotics (piperacillin, doxycycline, erythromycin, moxifloxacin or gentamicin). After 24h, mRNA levels of both cytokines (IL-1β, IL-6) and TLRs (1, 2, 4, and 6) were monitored and phagocytosis was determined following coincubation with Escherichia coli. Each antibiotic differentially regulated the gene expression of the investigated TLRs and cytokines in monocytes. Erythromycin, moxifloxacin and doxycyclin displayed the strongest effects and changed mRNA-levels of the investigated genes up to 5.6-fold. Consistent with this, antibiotics and, in particular, moxifloxacin, regulated the TLR-and cytokine expression in activated PBMCs obtained from patients after open-heart surgery. Furthermore, piperacillin, doxycyclin and moxifloxacin inhibited the phagocytic activity of monocytes. Our results suggest that antibiotics regulate the immune response by modulating TLR- and cytokine expression as well as phagocytosis under septic conditions. Moxifloxacin, doxycycline and erythromycin were shown to possess the strongest immunomodulatory effects and these antibiotic classes should be considered for future immunomodulatory studies in sepsis.
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Affiliation(s)
- Christian Bode
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany.
| | - Britta Diedrich
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany; Freiburg Institute for Advanced Studies-LifeNet, Albert-Ludwigs-University Freiburg, Freiburg, Germany
| | - Stefan Muenster
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Viktoria Hentschel
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Christina Weisheit
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Kuno Rommelsheim
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Andreas Hoeft
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Rainer Meyer
- Institute of Physiology II, University of Bonn, Bonn, Germany
| | - Olaf Boehm
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Pascal Knuefermann
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Georg Baumgarten
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
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31
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You DG, Saravanakumar G, Son S, Han HS, Heo R, Kim K, Kwon IC, Lee JY, Park JH. Dextran sulfate-coated superparamagnetic iron oxide nanoparticles as a contrast agent for atherosclerosis imaging. Carbohydr Polym 2013; 101:1225-33. [PMID: 24299895 DOI: 10.1016/j.carbpol.2013.10.068] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 09/16/2013] [Accepted: 10/21/2013] [Indexed: 01/14/2023]
Abstract
The hallmark of atherosclerosis in its early pathogenic process is the overexpression of class A scavenger receptors (SR-A) by activated macrophages. In this study, dextran sulfate-coated superparamagnetic iron oxide nanoparticles (DS-SPIONs), as a magnetic resonance (MR) imaging contrast agent of atherosclerosis, was prepared via the facile co-precipitation method using a versatile double-hydrophilic block copolymer comprising of a DS segment (ligand for SR-A) and a poly(glyclerol methacrylate) segment (SPIONs surface-anchoring unit). The physicochemical properties of the DS-SPIONs were investigated using various instruments. DS-SPIONs exhibited high aqueous stability compared to dextran-coated SPIONs (Dex-SPIONs), which were used as controls. The cellular uptake behaviors of DS-SPIONs and Dex-SPIONs were evaluated using Prussian blue assay. Interestingly, the DS-SPIONs were effectively taken up by activated macrophages compared to Dex-SPIONs. However, the cellular uptake of DS-SPIONs by activated macrophages was remarkably reduced in the presence of free DS. These results suggest that activated macrophages internalize DS-SPIONs via receptor (SR-A)-mediated endocytosis. T2-weighted MR imaging of the cells demonstrated that activated macrophages treated with DS-SPIONs showed a significantly lower signal intensity compared to those treated with Dex-SPIONs. Overall, these results suggest that DS-SPIONs may be utilized as a potential contrast agent for atherosclerosis MR imaging.
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Affiliation(s)
- Dong Gil You
- Departments of Polymer Science and Chemical Engineering, College of Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea; Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 6, Seongbuk-gu, Seoul 136-791, Republic of Korea
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32
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Salidroside attenuates LPS-stimulated activation of THP-1 cell-derived macrophages through down-regulation of MAPK/NF-kB signaling pathways. ACTA ACUST UNITED AC 2013; 33:463-469. [PMID: 23904362 DOI: 10.1007/s11596-013-1143-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 07/12/2013] [Indexed: 10/26/2022]
Abstract
Excessive activation of macrophages is implicated in various inflammatory injuries. Salidroside (Sal), one of the main bioactive components of Rhodiola Sachalinensis, has been reported to possess anti-inflammatory activities. This study aimed to examine the effect of Sal on the activation of macrophages and the possible mechanism. The lipopolysaccharide (LPS)-stimulated phrobol 12-myristate 13-acetate (PMA)-differentiated THP-1 macrophage models were established. The changes in the inflammatory profiles of THP-1-derived macrophages were determined. The results showed that Sal significantly decreased the expression of inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX2), interleukin-1beta (IL-1β), interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) at both mRNA and protein levels in THP-1-derived macrophages, and the effect was dose-depedent. Moreover, NF-κB activation was significantly suppressed and the phosphorylation of ERK, p38 and JNK was substantially down-regulated after Sal treatment. The findings suggested that Sal can suppress the activation of LPS-stimulated PMA-differetiated THP-1 cells, as evidenced by the decreased expression of iNOS, COX2, IL-1β, IL-6 and TNF-α, and the mechanism involves the inhibition of NF-κB activation and the phosphorylation of the MAPK signal pathway.
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33
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Alpha-fetoprotein contributes to THP-1 cell invasion and chemotaxis via protein kinase and Gi-protein-dependent pathways. Mol Cell Biochem 2013; 379:283-93. [PMID: 23615710 DOI: 10.1007/s11010-013-1650-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Accepted: 04/11/2013] [Indexed: 12/17/2022]
Abstract
Alpha-fetoprotein (AFP) for long was known as immunomodulator and tumor marker having multifaceted actions on the activity of normal and transformed cells. In present study, we have investigated the involvement of AFP in regulation of THP-1 cell line invasion and underlying mechanisms. Treatment with human recombinant AFP causes up-regulation of MMP9 expression, chemotaxis and calcium mobilization, and increases invasion through Matrigel, with no significant impact on THP-1 cell growth or viability. Using small molecule inhibitors, we have shown that the rhAFP-induced MMP9 expression depends on the activation of ERK1,2, JNK and Akt kinases, with the involvement of NFκB and likely, AP-1 transcription factors. In contrast, inhibition of p38 kinase, but not of JNK, had dramatic suppressive effect on the rhAFP-triggered chemotaxis. In addition, rhAFP-induced MMP9 expression and calcium response were completely blocked by pertussis toxin, indicating that Gi-protein-coupled receptor(s) has a mediatory role in these processes. CCR5 chemokine receptor is the only known Gi-protein binding to AFP. The action of CCR5 inhibitor Maraviroc results in partial suppression of MMP9 up-regulation and calcium response suggesting that CCR5 might be involved in these effects.
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34
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Interactions between LPS moieties and macrophage pattern recognition receptors. Vet Immunol Immunopathol 2013; 152:28-36. [DOI: 10.1016/j.vetimm.2012.09.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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35
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Toll-like receptor 4 in phagocytosis of Escherichia coli by endotoxin-activated human neutrophils in whole blood. Crit Care 2012. [PMCID: PMC3504881 DOI: 10.1186/cc11767] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
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36
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Kuhn DM, Vyas VK. The Candida glabrata adhesin Epa1p causes adhesion, phagocytosis, and cytokine secretion by innate immune cells. FEMS Yeast Res 2012; 12:398-414. [DOI: 10.1111/j.1567-1364.2011.00785.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Revised: 11/21/2011] [Accepted: 12/21/2011] [Indexed: 12/25/2022] Open
Affiliation(s)
- Duncan M. Kuhn
- Whitehead Institute for Biomedical Research; 9 Cambridge Center; Cambridge; MA; USA
| | - Valmik K. Vyas
- Whitehead Institute for Biomedical Research; 9 Cambridge Center; Cambridge; MA; USA
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37
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Sever-Chroneos Z, Tvinnereim A, Hunter RL, Chroneos ZC. Prolonged survival of scavenger receptor class A-deficient mice from pulmonary Mycobacterium tuberculosis infection. Tuberculosis (Edinb) 2011; 91 Suppl 1:S69-74. [PMID: 22088322 DOI: 10.1016/j.tube.2011.10.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The present study tested the hypothesis that the scavenger receptor SR-A modulates granuloma formation in response to pulmonary infection with Mycobacterium tuberculosis (MTB). To test this hypothesis, we monitored survival and histopathology in WT and SR-A-deficient mice following aerosol infection with MTB Rv. SR-A-deficient (SR-A-/-) mice infected with MTB survived significantly longer than WT mice; the mean survival of SR-A-/- mice exceeded 430 days compared to 230 days for WT mice. Early granuloma formation was not impaired in SR-A-/- mice. The extended survival of SR-A-/- mice was associated with 13- and 3-fold higher number of CD4+ lymphocytes and antigen presenting cells in SR-A-/- lungs compared to WT mice 280 after infection. The histopathology of chronically infected SR-A-/- lungs, however, was marked by abundant cholesterol clefts in parenchymal lesions containing infection in multinucleated giant cells. The present study indicates SR-A as a candidate gene of the innate immune system influencing the chronic phase of M. tuberculosis infection.
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Affiliation(s)
- Zvjezdana Sever-Chroneos
- University of Texas Health Science Center at Tyler, The Center for Biomedical Research, 11937 US Highway 271, Tyler, TX 75708-3154, United States.
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Xiang Q, Wen L, Liu MH, Zhang Y, Qu JF, Tian J. Endotoxin tolerance of RAW264.7 correlates with p38-dependent up-regulation of scavenger receptor-A. J Int Med Res 2009; 37:491-502. [PMID: 19383244 DOI: 10.1177/147323000903700225] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Pre-exposure to lipopolysaccharide (LPS) leads to hyposensitivity to secondary LPS stimulation, known as endotoxin tolerance. The role of macrophage scavenger receptor-A (SR-A) in endotoxin tolerance is unknown. In this study, LPS was shown to induce SR-A expression in the mouse macrophage cell line, RAW264.7, in dose- and time-dependent manners, which correlated with inflammatory cytokine suppression in RAW264.7 on secondary LPS stimulation. Over-expression of SR-A in RAW264.7 suppressed tumour necrosis factor (TNF)-alpha release and nuclear factor (NF)-kappa B activation, demonstrating the involvement of SR-A in endotoxin tolerance. LPS-pre-treated RAW264.7 cells could bind and internalize more fluorescein isothiocyanate (FITC)-LPS than untreated cells and both the SR-A ligand, fucoidan, and anti-SR-A 2F8 antibodies completely suppressed LPS-induced binding and internalization of FITC-LPS by RAW264.7. LPS-induced SR-A expression on RAW264.7 was completely suppressed by the p38-specific inhibitor, SB203580, but not by inhibition of toll-like receptor 4 (TLR4) signalling with MTS510, demonstrating that p38- but not TLR4-dependent up-regulation of SR-A was involved in endotoxin tolerance through binding and internalization of LPS.
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Affiliation(s)
- Q Xiang
- Department of Critical Care Medicine, Southwest Hospital, Third Military Medical University, Chongqing, China.
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Systemic inflammatory response reactivates immune-mediated lesions in rat brain. J Neurosci 2009; 29:4820-8. [PMID: 19369550 DOI: 10.1523/jneurosci.0406-09.2009] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The potential association between microbial infection and reactivation of a multiple sclerosis (MS) lesion is an important issue that remains unresolved, primarily because of the absence of suitable animal models and imaging techniques. Here, we have evaluated this question in an empirical manner using immunohistochemistry and magnetic resonance imaging (MRI), before and after the induction of a systemic inflammatory response in two distinct models of MS. In a pattern-II-type focal myelin oligodendrocyte glycoprotein-experimental autoimmune encephalomyelitis model, systemic endotoxin injection caused an increase in regional cerebral blood volume (rCBV) around the lesion site after 6 h, together with a reduction in the magnetization transfer ratio of the lesioned corpus callosum. These changes were followed by an increase in the diffusion of tissue water within the lesion 24 h after endotoxin challenge and new leukocyte recruitment as revealed both immunohistochemically and by MRI tracking of ultrasmall superparamagnetic iron oxide-labeled macrophages. Importantly, we detected in vivo expression of E- and P-selectin in quiescent lesions by MRI-detectable glyconanoparticles conjugated to sialyl Lewis(X). This finding may explain, at least in part, the ability of quiescent MS lesions to rapidly reinitiate the cell recruitment processes. In a pattern-I-type delayed-type hypersensitivity response model, a similar effect of endotoxin challenge on rCBV was observed, together with delayed breakdown of the blood-brain barrier, showing that systemic infection can alter the pathogenesis of MS-like lesions regardless of lesion etiology. These findings will have important implications for the management and monitoring of individuals with MS.
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Palin K, Cunningham C, Forse P, Perry VH, Platt N. Systemic inflammation switches the inflammatory cytokine profile in CNS Wallerian degeneration. Neurobiol Dis 2008; 30:19-29. [DOI: 10.1016/j.nbd.2007.11.012] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2007] [Revised: 11/30/2007] [Accepted: 11/30/2007] [Indexed: 10/22/2022] Open
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Antigen capture of Porphyromonas gingivalis by human macrophages is enhanced but killing and antigen presentation are reduced by endotoxin tolerance. Infect Immun 2007; 76:477-85. [PMID: 17998310 DOI: 10.1128/iai.00100-07] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The innate and the adaptive arms of the mucosal immune system must be coordinated to facilitate the control of pathogenic invasion while maintaining immune homeostasis. Toll-like receptors, able to activate the cell to produce bactericidal and inflammatory cytokines but also able to upregulate antigen (Ag)-presenting and costimulatory molecules, are particularly important in this regard. We have previously shown that the chronically infected oral mucosa is in a state of endotoxin tolerance, as evidenced by the downregulation of Toll-like receptors 2 and 4 and of inflammatory cytokines and the upregulation of SH2-containing inositol phosphatase, an inhibitor of NF-kappaB signaling. In the present study, we hypothesized that endotoxin tolerance would influence the ability of human macrophages to engage in Ag capture and killing of the oral pathogen Porphyromonas gingivalis and to upregulate costimulatory molecules and stimulate autologous T-cell proliferation. We show that uptake, but not killing, of P. gingivalis 381 is enhanced by endotoxin tolerance. Reduced killing is possibly due to a reduction of the intracellular lysosomes. We further show that the expression of the Ag-presenting molecule HLA-DR and costimulatory molecules CD40 and CD86 is dampened by endotoxin tolerance to the constitutive level. This, along with our previous evidence for reduction in immunostimulatory cytokines, is consistent with the observed decrease in the induction of autologous CD4(+) T-cell proliferation by endotoxin-tolerized macrophages. Overall, these studies suggest that endotoxin tolerance, as observed in the inflamed oral mucosa, potentiates the innate Ag capture activity of macrophages but diminishes the potential of human macrophages to initiate the adaptive immune response. In conclusion, endotoxin tolerance, while helpful in bacterial clearance and in surmounting excessive inflammatory tissue damage, could potentially reduce the (protective) adaptive immune response during chronic infections such as periodontitis.
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Facciponte JG, Wang XY, Subjeck JR. Hsp110 and Grp170, members of the Hsp70 superfamily, bind to scavenger receptor-A and scavenger receptor expressed by endothelial cells-I. Eur J Immunol 2007; 37:2268-79. [PMID: 17615582 DOI: 10.1002/eji.200737127] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Heat shock protein 110 (hsp110) and glucose-regulated protein (grp170) act as anti-cancer vaccines when complexed to tumor antigens by heat shock. It has been proposed that receptors on antigen-presenting cells contribute to HSP-mediated immune responses. Here, we show that hsp110 binds in a receptor-mediated manner to RAW264.7 macrophages, as does grp170. This hsp110/grp170 binding is inhibited by scavenger receptor ligands, suggesting a role for scavenger receptors as binding structures. We examined scavenger receptor class A (SR-A) and scavenger receptor expressed by endothelial cells-I (SREC-I). We show that hsp110/grp170 binds to both SR-A- and SREC-I-expressing CHO cells in a saturable manner and scavenger receptor ligands inhibit binding. Hsp110 also saturably binds mouse bone marrow-derived dendritic cells (bmDC) and is inhibited by scavenger receptor ligands. When an hsp110-rat neu (intracellular domain) heat shock complex vaccine is used to pulse mouse bmDC in vitro, an induction of IFN-gamma secretion is observed by CD8+ T lymphocytes isolated from vaccine-immunized mice. This immune response is inhibited by the application of scavenger receptor ligands to bmDC. Thus, SR-A and SREC-I appear to contribute to the binding of hsp110 and grp170 on APC. Scavenger receptors, in general, contribute to the cross-presentation of hsp110-chaperoned protein antigen.
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Affiliation(s)
- John G Facciponte
- Department of Immunology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
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Jagavelu K, Tietge UJF, Gaestel M, Drexler H, Schieffer B, Bavendiek U. Systemic deficiency of the MAP kinase-activated protein kinase 2 reduces atherosclerosis in hypercholesterolemic mice. Circ Res 2007; 101:1104-12. [PMID: 17885219 DOI: 10.1161/circresaha.107.156075] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Atherosclerosis is a chronic inflammatory disease and represents the major cause of cardiovascular morbidity and mortality. A critical regulator of inflammatory processes represents the mitogen-activated protein kinase-activated protein kinase-2 (MK2). Therefore, we investigated the functional role of MK2 in atherogenesis in hypercholesterolemic mice as well as potentially underlying mechanisms in vivo and in vitro. Activation of MK2 (phospho-MK2) was predominantly detected in the endothelium and macrophage-rich plaque areas within aortas of hypercholesterolemic LDL receptor-deficient mice (ldlr(-/-)). Systemic MK2 deficiency of hypercholesterolemic ldlr(-/-) mice (ldlr(-/-)/mk2(-/-)) significantly decreased the accumulation of lipids and macrophages in the aorta after feeding an atherogenic diet for 8 and 16 weeks despite a significant increase in proatherogenic plasma lipoproteins compared with ldlr(-/-) mice. Deficiency of MK2 significantly decreased oxLDL-induced foam cell formation in vitro, diet-induced foam cell formation in vivo, and expression of scavenger receptor A in primary macrophages. In addition, systemic MK2 deficiency of hypercholesterolemic ldlr(-/-) mice significantly decreased the aortic expression of the adhesion molecule VCAM-1 and the chemokine MCP-1, key mediators of macrophage recruitment into the vessel wall. Furthermore, silencing of MK2 in endothelial cells by siRNA reduced the IL-1beta-induced expression of VCAM-1 and MCP-1. MK2 critically promotes atherogenesis by fostering foam cell formation and recruitment of monocytes/macrophages into the vessel wall. Therefore, MK2 might represent an attractive novel target for the treatment of atherosclerotic cardiovascular disease.
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Affiliation(s)
- Kumaravelu Jagavelu
- Department of Cardiology & Angiology, Hannover Medical School, Carl-Neuberg-Str. 01, 30625 Hannover, Germany
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Yasuda T, Hirata KI, Ishida T, Kojima Y, Tanaka H, Okada T, Quertermous T, Yokoyama M. Endothelial lipase is increased by inflammation and promotes LDL uptake in macrophages. J Atheroscler Thromb 2007; 14:192-201. [PMID: 17726294 DOI: 10.5551/jat.e502] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
AIM Endothelial lipase (EL) is a member of the lipoprotein lipase family that regulates HDL metabolism. EL is known to act as a bridging molecule for monocytes or lipoproteins in vascular endothelial cells. We investigated the role and regulatory mechanisms of EL expression in macrophages. METHODS Macrophages originating from wild-type (EL+/+) and EL-deficient (EL-/-) mice were stimulated with lipopolysaccharide (LPS). The expression of EL mRNA was evaluated by northern blotting. DiI-LDL was used to measure the uptake of native low-density lipoprotein (nLDL). RESULTS LPS increased EL mRNA levels by increasing intracellular oxidative stress in the macrophages. LPS did not affect EL expression in macrophages derived from Toll-like receptor 4 (TLR4) gene mutant mice, C3H/HeJ. The uptake of nLDL after LPS-treatment was significantly lower in macrophages from EL-/- mice than those from EL+/+ mice. Simvastatin suppressed the LPS-induced upregulation of EL expression and uptake of nLDL. CONCLUSIONS EL expression is upregulated by LPS via TLR4 and promotes the uptake of nLDL by macrophages. Simvastatin inhibits the LPS-induced up-regulation and uptake in macrophages. Thus, our findings provide a novel role for EL in lipoprotein metabolism and would expand the range of anti-atherogenic effects of statins.
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Affiliation(s)
- Tomoyuki Yasuda
- Division of Cardiovascular Medicine, Kobe University Graduate School of Medicine, Japan
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Soares-Schanoski A, Gómez-Piña V, del Fresno C, Rodríguez-Rojas A, García F, Glaría A, Sánchez M, Vallejo-Cremades MT, Baos R, Fuentes-Prior P, Arnalich F, López-Collazo E. 6-Methylprednisolone down-regulates IRAK-M in human and murine osteoclasts and boosts bone-resorbing activity: a putative mechanism for corticoid-induced osteoporosis. J Leukoc Biol 2007; 82:700-9. [PMID: 17576820 DOI: 10.1189/jlb.1106673] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Osteoclasts are large, multinucleated cells, which originate from the fusion of macrophages. They play a central role in bone development and remodeling via the resorption of bone and are thus important mediators of bone loss, which leads to osteoporosis. IL-1R-associated kinase (IRAK)-M is a pseudokinase, which acts as a negative modulator of innate immune responses mediated by TLRs and IL-1R. Recently, it has been reported that IRAK-M also participates in the control of macrophage differentiation into osteoclasts. In addition, it was shown that IRAK-M knockout mice develop a strong osteoporosis phenotype, suggesting that down-regulation of this molecule activates osteoclast-mediated bone resorption. We studied the effect of the osteoporosis-inducing glucocorticoid, 6-methylprednisolone (6-MP), on IRAK-M expression in osteoclasts. Our results showed that osteoclasts, derived from THP-1 and RAW cells as well as human blood monocytes, differentiated into osteoclasts, express high levels of IRAK-M at mRNA and protein levels. In addition, 6-MP down-regulates IRAK-M expression, which correlates with an increased activation of bone resorption. These findings suggest a mechanism of corticosteroid-induced osteoporosis and open new avenues for treating this endemic disease of Western societies.
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Xu WY, Wang L, Wang HM, Wang YQ, Liang YF, Zhao TT, Wu YZ. TLR2 and TLR4 agonists synergistically up-regulate SR-A in RAW264.7 through p38. Mol Immunol 2007; 44:2315-23. [PMID: 17173973 DOI: 10.1016/j.molimm.2006.11.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2006] [Revised: 11/06/2006] [Indexed: 11/29/2022]
Abstract
It is known that macrophage scavenger receptor A (SR-A) can protect mice from endotoxemia. In addition, Escherichia coli O111:B4 LPS from Sigma (sLPS), which contains both TLR4 and TLR2 agonists, was previously reported to be able to induce SR-A expression on murine macrophage cell line RAW264.7. However, the relative role of both TLR4 and TLR2 agonists from Sigma (sLPS) in the up-regulation of SR-A on RAW264.7 is still undefined. Here, we found that sLPS could only slightly up-regulate SR-A on RAW264.7 following removing its TLR4 and TLR2 agonists, respectively. In contrast, the combination of TLR4 agonist uLPS (re-extracted sLPS) and TLR2 agonist Pam3CSK4 dramatically induced SR-A expression, and synergistically promoted RAW264.7 to bind and internalize FITC-LPS specifically through SR-A. The combination had no such effect either on TLR2 or TLR4 expression, and incubation with IL-6, IL-10, IL-12 or TNF-alpha alone could not induce SR-A expression on RAW264.7. In addition, treatment with a NF-kappaB inhibitor pyrrolidine dithiocarbamate (PDTC) could only weakly suppress the up-regulation of SR-A by the combination. However, the combination synergistically promoted MAPK p38 phosphorylation, and p38 specific inhibitor SB203580 completely suppressed its inducible effect on SR-A expression. Hence, we demonstrated that up-regulation of SR-A by sLPS was resulted from the cooperation of its TLR4 and TLR2 agonists through p38, and we also presented a novel synergy effect of TLR2 and TLR4 agonists.
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Affiliation(s)
- Wen-Yue Xu
- Institute of Immunology, The Third Military Medical University, 30 Gaotanyan Street, Shapingba District, Chongqing 400038, China
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Sood V, Unwalla H, Gupta N, Chakraborti S, Banerjea AC. Potent knock down of HIV-1 replication by targeting HIV-1 Tat/Rev RNA sequences synergistically with catalytic RNA and DNA. AIDS 2007; 21:31-40. [PMID: 17148965 DOI: 10.1097/qad.0b013e3280118fb6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Ribozymes (Rzs) and DNA-enzymes (Dzs) possess the ability to prevent gene expression by cleaving target RNA in a catalytic and sequence-specific manner. Although Rzs or Dzs have been used earlier for HIV-1 gene suppression, the present study explored the possibility of using catalytic RNA and DNA simultaneously in a synergistic manner with the hope that this novel approach will allow more potent inhibition for a longer duration. METHODS In order to achieve long-term inhibition of HIV-1 replication, a novel non-GUX hammerhead Rz was designed by standard recombinant DNA technology and cloned it under the powerful CMV promoter containing expression vector. A 10-23 catalytic motif containing Dz that was targeted against the conserved second exon of HIV-1 Tat/Rev region was also assembled. RESULTS Both Rz and Dz possessed sequence-specific cleavage activities individually and simultaneously cleaved target RNA in a synergistic manner under the same in vitro cleavage conditions. These catalytic molecules inhibited HIV-1 replication in macrophages individually and exhibited potent inhibitory effects when used in combination. CONCLUSIONS The combination strategy described here can be widely used against any target RNA to achieve more effective gene inhibition that exploits the simultaneous sequence-specific cleavage potentials of catalytic RNA and DNA.
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Affiliation(s)
- Vikas Sood
- Laboratory of Virology, National Institute of Immunology, JNU Campus, Aruna Asaf Ali Marg, New Delhi, India
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Józefowski S, Arredouani M, Sulahian T, Kobzik L. Disparate regulation and function of the class A scavenger receptors SR-AI/II and MARCO. THE JOURNAL OF IMMUNOLOGY 2006; 175:8032-41. [PMID: 16339540 DOI: 10.4049/jimmunol.175.12.8032] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The macrophage class A scavenger receptors, macrophage receptor with a collagenous structure (MARCO) and type I/II class A scavenger receptor (SR-AI/II), share structural features and roles in host defense, but little is known about their regulation and signaling properties. Ligation of MARCO on mouse thioglycollate-elicited peritoneal macrophages (PEMs) with immobilized mAb costimulated IL-12 production, in contrast to previously reported inhibition by SR-AI/II. PEMs from MARCO-deficient mice exhibited 2.7 times lower IL-12 production in responses to stimulation with LPS and IFN-gamma and lack of significant IL-12 production on stimulation with LPS alone. Conversely, SR-AI/II-deficient PEMs produced 2.4 and 1.8 times more IL-12 than wild-type PEMs in response to LPS or LPS and IFN-gamma, respectively. Corresponding differences in regulation of SR-A and MARCO expression were also observed. Th1 adjuvants (LPS, a CpG motif-containing oligodeoxynucleotide (CpG-ODN), IL-12, and GM-CSF) increased, whereas Th2-polarizing factors (IL-4, M-CSF, and non-CpG ODN) decreased expression of MARCO on J774 macrophage-like cells. Expression of SR-A was regulated in the opposite manner to MARCO or not affected. Whereas MARCO was involved in opsonin-independent phagocytosis in CpG-ODN-pretreated but not in IL-4-pretreated J774 cells, anti-SR-A Abs inhibited particle uptake in untreated and IL-4-pretreated but not in CpG-ODN-pretreated cells. SR-A and MARCO are regulated differently and mediate distinct negative and positive effects on IL-12 production in macrophages. These differences may contribute to sustained Th1 or Th2 polarization of ongoing immune responses.
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Kvell K, Czömpöly T, Pikkarainen T, Balogh P. Species-specific restriction of cell surface expression of mouse MARCO glycoprotein in murine cell lines. Biochem Biophys Res Commun 2006; 341:1193-202. [PMID: 16460688 DOI: 10.1016/j.bbrc.2006.01.083] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2006] [Accepted: 01/17/2006] [Indexed: 12/19/2022]
Abstract
The MARCO (macrophage receptor with collagenous structure) glycoprotein belongs to the scavenger receptor type family of pattern-recognition molecules produced by a subset of marginal zone macrophages in the spleen. Stimulation with LPS leads to its appearance on macrophages located at other tissue compartments. In the present work, we report its in vitro expression by various cell lines using transient and stable (lentiviral) gene delivery aimed at investigating the signaling properties of this receptor and its analysis using a novel rat monoclonal antibody against the SRCR-domain of mouse MARCO. When trying to establish stable mouse MARCO-transfectants using lentiviral transduction and other methods, we consistently found that MARCO accumulated intracellularly in various murine host cells. In contrast, such a phenomenon was not observed in non-murine cell lines. Our observations indicate the presence of an unexpected limitation of the in vitro expression of mouse MARCO glycoprotein in murine cell lines. We believe that the failure to express MARCO on the cell surface of the many murine cell lines is likely due to the absence of endoplasmic reticulum molecular chaperones needed for the correct folding and assembly of the trimeric MARCO molecule.
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Affiliation(s)
- Krisztián Kvell
- Department of Immunology and Biotechnology, Faculty of Medicine, University of Pécs, Szigeti út 12, H-7634 Pécs, Hungary
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Jiang-Shieh YF, Yeh KY, Wei IH, Chang CY, Chien HF, Tsai RY, Chang ML, Lee AW, Pai MH, Wu CH. Responses of microglia in vitro to the gram-positive bacterial component, lipoteichoic acid. J Neurosci Res 2006; 82:515-24. [PMID: 16237723 DOI: 10.1002/jnr.20663] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
An increase in incidence and severity of gram-positive infections has emerged in the past decade. In this regard, attention has been focused recently on immune responses of microglial cells in the central nervous system to gram-positive bacteria. The underlying immunological and cellular events in microglial activation induced by specific bacterial toxin of gram-positive bacteria, however, have not yet been clarified fully. This study reports that a simple cell wall product, lipoteichoic acid (LTA), derived from gram-positive bacteria (Staphylococcus aureus) could trigger microglial activation in vitro. Microglia challenged with LTA showed intense ruffling of plasma membrane in the form of lamellipodia or rounded up forming cell aggregates. MTT assay and Western blot analysis with anti-proliferating cell nuclear antigen antibody showed a significant microglial proliferation that may be induced at the later phases of LTA treatment with low doses but at the early period with a high dose. Concentrated LTA also caused apoptotic death of cultured microglia showing fragmented nuclei and increased expression of annexin V or caspase 3. In response to LTA, isolated microglia increased the expression of inducible nitric oxide synthase and major histocompatibility complex class II antigen. Microglial LTA receptors such as CD14 molecule, complement receptor type 3, and macrophage scavenger receptor were upregulated concurrently. In conclusion, staphylococcal LTA can exert an immunomodulatory effect on microglial morphology, cell cycle, and immunomolecules, including its receptors.
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Affiliation(s)
- Ya-Fen Jiang-Shieh
- Department of Anatomy, National Cheng Kung University Medical College, Tainan, Taiwan
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