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Wu X, Cheong LY, Yuan L, Jin L, Zhang Z, Xiao Y, Zhou Z, Xu A, Hoo RLC, Shu L. Islet-Resident Memory T Cells Orchestrate the Immunopathogenesis of Type 1 Diabetes through the FABP4-CXCL10 Axis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2308461. [PMID: 38884133 PMCID: PMC11321687 DOI: 10.1002/advs.202308461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 04/18/2024] [Indexed: 06/18/2024]
Abstract
Type 1 diabetes (T1D) is a chronic disease characterized by self-destruction of insulin-producing pancreatic β cells by cytotoxic T cell activity. However, the pathogenic mechanism of T cell infiltration remains obscure. Recently, tissue-resident memory T (TRM) cells have been shown to contribute to cytotoxic T cell recruitment. TRM cells are found present in human pancreas and are suggested to modulate immune homeostasis. Here, the role of TRM cells in the development of T1D is investigated. The presence of TRM cells in pancreatic islets is observed in non-obese diabetic (NOD) mice before T1D onset. Mechanistically, elevated fatty acid-binding protein 4 (FABP4) potentiates the survival and alarming function of TRM cells by promoting fatty acid utilization and C-X-C motif chemokine 10 (CXCL10) secretion, respectively. In NOD mice, genetic deletion of FABP4 or depletion of TRM cells using CD69 neutralizing antibodies resulted in a similar reduction of pancreatic cytotoxic T cell recruitment, a delay in diabetic incidence, and a suppression of CXCL10 production. Thus, targeting FABP4 may represent a promising therapeutic strategy for T1D.
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Affiliation(s)
- Xiaoping Wu
- State Key Laboratory of Pharmaceutical BiotechnologyThe University of Hong KongHong Kong999077P. R. China
- Department of Pharmacology & PharmacyThe University of Hong KongHong Kong999077P. R. China
| | - Lai Yee Cheong
- State Key Laboratory of Pharmaceutical BiotechnologyThe University of Hong KongHong Kong999077P. R. China
- Department of MedicineThe University of Hong KongHong Kong999077P. R. China
| | - Lufengzi Yuan
- State Key Laboratory of Pharmaceutical BiotechnologyThe University of Hong KongHong Kong999077P. R. China
- Department of Pharmacology & PharmacyThe University of Hong KongHong Kong999077P. R. China
| | - Leigang Jin
- State Key Laboratory of Pharmaceutical BiotechnologyThe University of Hong KongHong Kong999077P. R. China
- Department of MedicineThe University of Hong KongHong Kong999077P. R. China
| | - Zixuan Zhang
- State Key Laboratory of Pharmaceutical BiotechnologyThe University of Hong KongHong Kong999077P. R. China
- Department of Pharmacology & PharmacyThe University of Hong KongHong Kong999077P. R. China
| | - Yang Xiao
- Second Xiangya HospitalKey Laboratory of Diabetes ImmunologyNational Clinical Research Center for Metabolic DiseasesCentral South UniversityChangshaHunan410083P. R. China
| | - Zhiguang Zhou
- Second Xiangya HospitalKey Laboratory of Diabetes ImmunologyNational Clinical Research Center for Metabolic DiseasesCentral South UniversityChangshaHunan410083P. R. China
| | - Aimin Xu
- State Key Laboratory of Pharmaceutical BiotechnologyThe University of Hong KongHong Kong999077P. R. China
- Department of Pharmacology & PharmacyThe University of Hong KongHong Kong999077P. R. China
- Department of MedicineThe University of Hong KongHong Kong999077P. R. China
| | - Ruby LC Hoo
- State Key Laboratory of Pharmaceutical BiotechnologyThe University of Hong KongHong Kong999077P. R. China
- Department of Pharmacology & PharmacyThe University of Hong KongHong Kong999077P. R. China
| | - Lingling Shu
- State Key Laboratory of Pharmaceutical BiotechnologyThe University of Hong KongHong Kong999077P. R. China
- State Key Laboratory of Oncology in South ChinaGuangdong Provincial Clinical Research Center for Cancer, Department of Hematological OncologySun Yat‐sen University Cancer CenterGuangzhou510060P. R. China
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Wang Z, Zhu D, Zhang Y, Xia F, Zhu J, Dai J, Zhuge X. Extracellular vesicles produced by avian pathogenic Escherichia coli (APEC) activate macrophage proinflammatory response and neutrophil extracellular trap (NET) formation through TLR4 signaling. Microb Cell Fact 2023; 22:177. [PMID: 37689682 PMCID: PMC10492386 DOI: 10.1186/s12934-023-02171-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 08/08/2023] [Indexed: 09/11/2023] Open
Abstract
BACKGROUND Avian pathogenic Escherichia coli (APEC) is the major pathogen causing important avian diseases in poultry. As an important subtype of extraintestinal pathogenic E. coli, APEC has zoonotic potential and is considered a foodborne pathogen. APEC extracellular vesicles (EVs) may play vital roles in the interaction of the pathogen with its host cells. However, the precise roles played by APEC EVs are still not completely clear, especially in immune cells. RESULTS In this study, we investigated the relationships between APEC EVs and immune cells. The production and characteristics of the EVs of APEC isolate CT265 were identified. Toll like receptor 4 (TLR4) triggered the cellular immune responses when it interacted with APEC EVs. APEC EVs induced a significant release of proinflammatory cytokines in THP-1 macrophages. APEC EVs induced the macrophage inflammatory response via the TLR4/MYD88/NF-κB signaling pathway, which participated in the activation of the APEC-EV-induced NLRP3 inflammasome. However, the loss of lipopolysaccharide (LPS) from APEC EVs reduced the activation of the NLRP3 inflammasome mediated by TLR4/MYD88/NF-κB signaling. Because APEC EVs activated the macrophage inflammatory response and cytokines release, we speculated that the interaction between APEC EVs and macrophages activated and promoted neutrophil migration during APEC extraintestinal infection. This study is the first to report that APEC EVs induce the formation of neutrophil extracellular traps (NETs) and chicken heterophil extracellular traps. Treatment with APEC EVs induced SAPK/JNK activation in neutrophils. The inhibition of TLR4 signaling suppressed APEC-EV-induced NET formation. However, although APEC EVs activated the immune response of macrophages and initiated NET formation, they also damaged macrophages, causing their apoptosis. The loss of LPS from APEC EVs did not prevent this process. CONCLUSION APEC-derived EVs induced inflammatory responses in macrophages and NETs in neutrophils, and that TLR4 was involved in the APEC-EV-activated inflammatory response. These findings provided a basis for the further study of APEC pathogenesis.
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Affiliation(s)
- Zhongxing Wang
- Key Lab of Animal Bacteriology, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Ministry of Agriculture, Nanjing Agricultural University, No.1 Weigang road, Nanjing, 210095, China
- Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, No.9 Seyuan road, Nantong, Jiangsu, 226019, P.R. China
| | - Dongyu Zhu
- Key Lab of Animal Bacteriology, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Ministry of Agriculture, Nanjing Agricultural University, No.1 Weigang road, Nanjing, 210095, China
- Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, No.9 Seyuan road, Nantong, Jiangsu, 226019, P.R. China
| | - Yuting Zhang
- Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, No.9 Seyuan road, Nantong, Jiangsu, 226019, P.R. China
| | - Fufang Xia
- Key Lab of Animal Bacteriology, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Ministry of Agriculture, Nanjing Agricultural University, No.1 Weigang road, Nanjing, 210095, China
- Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, No.9 Seyuan road, Nantong, Jiangsu, 226019, P.R. China
| | - Jiaying Zhu
- College of Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - Jianjun Dai
- Key Lab of Animal Bacteriology, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Ministry of Agriculture, Nanjing Agricultural University, No.1 Weigang road, Nanjing, 210095, China.
- College of Pharmacy, China Pharmaceutical University, Nanjing, 211198, China.
| | - Xiangkai Zhuge
- Key Lab of Animal Bacteriology, MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Ministry of Agriculture, Nanjing Agricultural University, No.1 Weigang road, Nanjing, 210095, China.
- Department of Nutrition and Food Hygiene, School of Public Health, Nantong University, No.9 Seyuan road, Nantong, Jiangsu, 226019, P.R. China.
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3
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Westerlund J, Askman S, Pettersson Å, Hellmark T, Johansson ÅCM, Hansson M. Suppression of T-Cell Proliferation by Normal Density Granulocytes Led to CD183 Downregulation and Cytokine Inhibition in T-Cells. J Immunol Res 2022; 2022:8077281. [PMID: 36438199 PMCID: PMC9683987 DOI: 10.1155/2022/8077281] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/11/2022] [Accepted: 10/14/2022] [Indexed: 11/08/2023] Open
Abstract
Normal density granulocytes (NDGs) can suppress T-cell responses in a similar way as myeloid-derived suppressor cells (MDSCs). In this study, we tested the hypothesis that NDGs from healthy donors preferentially inhibit T helper 1 (Th1) cells and investigated the myeloid-derived suppressive effect in different T-cell populations. We found that NDG-induced suppression of T-cell proliferation was contact dependent, mediated by integrin CD11b, and dependent on NDG-production of reactive oxygen species (ROS). The suppression was rapid and occurred within the first few hours of coculture. The suppression did not influence the CD8+/CD4+ ratio indicating an equal sensitivity in these populations. We further analyzed the CD4+ T helper subsets and found that NDGs induced a loss of Th1 surface marker, CD183, that was unrelated to ligand-binding to CD183. In addition, we analyzed the Th1, Th2, and Th17 cytokine production and found that all cytokine groups were suppressed when T-cells were incubated with NDGs. We therefore concluded that NDGs do not preferentially suppress Th1-cells. Instead, NDGs generally suppress Th cells and cytotoxic T-cells but specifically downregulate the Th1 marker CD183.
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Affiliation(s)
- Julia Westerlund
- Lund University, Department of Laboratory Medicine, Division of Hematology and Transfusion Medicine, BMC B13, 22184 Lund, Sweden
| | - Sandra Askman
- Lund University, Department of Laboratory Medicine, Division of Hematology and Transfusion Medicine, BMC B13, 22184 Lund, Sweden
- Skåne University Hospital, Department of Respiratory Medicine and Allergology, 22185 Lund, Sweden
| | - Åsa Pettersson
- Lund University, Department of Laboratory Medicine, Division of Hematology and Transfusion Medicine, BMC B13, 22184 Lund, Sweden
- Lund University, Skåne University Hospital, Department of Clinical Sciences Lund, Nephrology, Barngatan 2, 22185 Lund, Sweden
| | - Thomas Hellmark
- Lund University, Skåne University Hospital, Department of Clinical Sciences Lund, Nephrology, Barngatan 2, 22185 Lund, Sweden
| | - Åsa C. M. Johansson
- Lund University, Department of Laboratory Medicine, Division of Hematology and Transfusion Medicine, BMC B13, 22184 Lund, Sweden
- Skåne University Hospital, Region Skåne, Clinical Genetics and Pathology, 22185 Lund, Sweden
| | - Markus Hansson
- Skåne University Hospital, Department of Hematology, Oncology and Radiation Physics, 22185 Lund, Sweden
- University of Göteborg, Sahlgrenska Academy, Institute of Medicine, Department of Internal Medicin and clinical nutrition, Bruna stråket 5, Plan 5, 41325 Göteborg, Sweden
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4
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Wang H, Zhang Y, Wang Q, Wei X, Wang H, Gu K. The regulatory mechanism of neutrophil extracellular traps in cancer biological behavior. Cell Biosci 2021; 11:193. [PMID: 34758877 PMCID: PMC8579641 DOI: 10.1186/s13578-021-00708-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Accepted: 10/31/2021] [Indexed: 11/10/2022] Open
Abstract
As the predominant host defense against pathogens, neutrophil extracellular traps (NETs) have attracted increasing attention due to their vital roles in infectious inflammation in the past few years. Interestingly, NETs also play important roles in noninfectious conditions, such as rheumatism and cancer. The process of NETs formation can be regulated and the form of cell death accompanied by the formation of NETs is regarded as "NETosis". A large amount of evidence has confirmed that many stimuli can facilitate the release of NETs from neutrophils. Furthermore, it has been illustrated that NETs promote tumor growth and progression via many molecular pathways. Meanwhile, NETs also can promote metastasis in many kinds of cancers based on multiple studies. In addition, some researchs have found that NETs can promote coagulation and cancer-associated thrombosis. In the present review, it will highlight how NETosis, which is stimulated by various stimuli and signaling pathways, affects cancer biological behaviors via NETs. Given their crucial roles in cancer, NETs will become possible therapeutic targets for inhibiting proliferation, metastasis and thrombosis in cancer patients.
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Affiliation(s)
- Hui Wang
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei, 230022, Anhui, People's Republic of China
| | - Yiyin Zhang
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei, 230022, Anhui, People's Republic of China
| | - Qianling Wang
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei, 230022, Anhui, People's Republic of China
| | - Xiaoli Wei
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei, 230022, Anhui, People's Republic of China
| | - Hua Wang
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei, 230022, Anhui, People's Republic of China.
| | - Kangsheng Gu
- Department of Oncology, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Hefei, 230022, Anhui, People's Republic of China.
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5
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Rohr M, Kiefer AM, Kauhl U, Groß J, Opatz T, Erkel G. Anti-inflammatory dihydroxanthones from a Diaporthe species. Biol Chem 2021; 403:89-101. [PMID: 34333887 DOI: 10.1515/hsz-2021-0192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 07/09/2021] [Indexed: 11/15/2022]
Abstract
In a search for anti-inflammatory compounds from fungi inhibiting the promoter activity of the small chemokine CXCL10 (Interferon-inducible protein 10, IP-10) as a pro-inflammatory marker gene, the new dihydroxanthone methyl (1R, 2R)-1,2,8-trihydroxy-6-(hydroxymethyl)-9-oxo-2,9-dihydro-1H-xanthene-1-carboxylate (2) and the previously described dihydroxanthone AGI-B4 (1) were isolated from fermentations of a Diaporthe species. The structures of the compounds were elucidated by a combination of one- and two-dimensional NMR spectroscopy, mass spectrometry, and calculations using density functional theory (DFT). Compounds 1 and 2 inhibited the LPS/IFNγ induced CXCL10 promoter activity in transiently transfected human MonoMac6 cells in a dose-dependent manner with IC50 values of 4.1 µM (±0.2 µM) and 1.0 µM (±0.06 µM) respectively. Moreover, compounds 1 and 2 reduced mRNA levels and synthesis of pro-inflammatory mediators such as cytokines and chemokines in LPS/IFNγ stimulated MonoMac6 cells by interfering with the Stat1 and NFκB pathway.
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Affiliation(s)
- Markus Rohr
- Department of Molecular Biotechnology and Systems Biology, University of Kaiserslautern, Paul-Ehrlich-Strasse 23, D-67663Kaiserslautern, Germany
| | - Anna Maria Kiefer
- Department of Molecular Biotechnology and Systems Biology, University of Kaiserslautern, Paul-Ehrlich-Strasse 23, D-67663Kaiserslautern, Germany
| | - Ulrich Kauhl
- Department of Chemistry, University of Mainz, Duesbergweg 10-14, D-55128Mainz, Germany
| | - Jonathan Groß
- Department of Chemistry, University of Mainz, Duesbergweg 10-14, D-55128Mainz, Germany
| | - Till Opatz
- Department of Chemistry, University of Mainz, Duesbergweg 10-14, D-55128Mainz, Germany
| | - Gerhard Erkel
- Department of Molecular Biotechnology and Systems Biology, University of Kaiserslautern, Paul-Ehrlich-Strasse 23, D-67663Kaiserslautern, Germany
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6
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van Hoffen E, Mercenier A, Vidal K, Benyacoub J, Schloesser J, Kardinaal A, Lucas-van de Bos E, van Alen I, Roggero I, Duintjer K, Berendts A, Albers R, Kleerebezem M, Ten Bruggencate S. Characterization of the pathophysiological determinants of diarrheagenic Escherichia coli infection using a challenge model in healthy adults. Sci Rep 2021; 11:6060. [PMID: 33723346 PMCID: PMC7960709 DOI: 10.1038/s41598-021-85161-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 02/15/2021] [Indexed: 11/09/2022] Open
Abstract
An experimental human challenge model with an attenuated diarrheagenic Escherichia coli (E. coli) strain has been used in food intervention studies aimed to increase resistance to E. coli infection. This study was designed to refine and expand this challenge model. In a double-blind study, healthy male subjects were orally challenged with 1E10 or 5E10 colony-forming units (CFU) of E. coli strain E1392/75-2A. Three weeks later, subjects were rechallenged with 1E10 CFU of E. coli. Before and after both challenges, clinical symptoms and infection- and immune-related biomarkers were analyzed. Subset analysis was performed on clinically high- and low-responders. Regardless of inoculation dose, the first challenge induced clinical symptoms for 2-3 days. In blood, neutrophils, CRP, CXCL10, and CFA/II-specific IgG were induced, and in feces calprotectin and CFA/II-specific IgA. Despite clinical differences between high- and low-responders, infection and immune biomarkers did not differ. The first inoculation induced protection at the second challenge, with a minor clinical response, and no change in biomarkers. The refined study design resulted in a larger dynamic range of symptoms, and identification of biomarkers induced by a challenge with the attenuated E. coli strain E1392/75-2A, which is of value for future intervention studies. Addition of a second inoculation allows to study the protective response induced by a primary infection.Clinicaltrials.gov registration: NCT02541695 (04/09/2015).
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Affiliation(s)
- Els van Hoffen
- Department of Nutrition and Health, NIZO, PO Box 20, 6710 BA, Ede, the Netherlands
| | - Annick Mercenier
- Nestlé Institute of Health Sciences, Gastrointestinal Health, Nestlé Research, Lausanne, Switzerland.,NutriLeads, Wageningen, The Netherlands
| | - Karine Vidal
- Nestlé Institute of Health Sciences, Gastrointestinal Health, Nestlé Research, Lausanne, Switzerland
| | - Jalil Benyacoub
- Nestlé Institute of Health Sciences, Gastrointestinal Health, Nestlé Research, Lausanne, Switzerland
| | - Joyce Schloesser
- Department of Nutrition and Health, NIZO, PO Box 20, 6710 BA, Ede, the Netherlands.
| | - Alwine Kardinaal
- Department of Nutrition and Health, NIZO, PO Box 20, 6710 BA, Ede, the Netherlands
| | | | - Ingrid van Alen
- Department of Nutrition and Health, NIZO, PO Box 20, 6710 BA, Ede, the Netherlands
| | - Iris Roggero
- Nestlé Institute of Health Sciences, Gastrointestinal Health, Nestlé Research, Lausanne, Switzerland
| | - Kim Duintjer
- Department of Nutrition and Health, NIZO, PO Box 20, 6710 BA, Ede, the Netherlands.,Host Microbe Interactomics Group, Department of Animal Sciences, Wageningen University and Research, Wageningen, the Netherlands
| | - Anneke Berendts
- Department of Nutrition and Health, NIZO, PO Box 20, 6710 BA, Ede, the Netherlands
| | | | - Michiel Kleerebezem
- Host Microbe Interactomics Group, Department of Animal Sciences, Wageningen University and Research, Wageningen, the Netherlands
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7
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Walsh CM, Hill RZ, Schwendinger-Schreck J, Deguine J, Brock EC, Kucirek N, Rifi Z, Wei J, Gronert K, Brem RB, Barton GM, Bautista DM. Neutrophils promote CXCR3-dependent itch in the development of atopic dermatitis. eLife 2019; 8:48448. [PMID: 31631836 PMCID: PMC6884397 DOI: 10.7554/elife.48448] [Citation(s) in RCA: 91] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 10/17/2019] [Indexed: 12/12/2022] Open
Abstract
Chronic itch remains a highly prevalent disorder with limited treatment options. Most chronic itch diseases are thought to be driven by both the nervous and immune systems, but the fundamental molecular and cellular interactions that trigger the development of itch and the acute-to-chronic itch transition remain unknown. Here, we show that skin-infiltrating neutrophils are key initiators of itch in atopic dermatitis, the most prevalent chronic itch disorder. Neutrophil depletion significantly attenuated itch-evoked scratching in a mouse model of atopic dermatitis. Neutrophils were also required for several key hallmarks of chronic itch, including skin hyperinnervation, enhanced expression of itch signaling molecules, and upregulation of inflammatory cytokines, activity-induced genes, and markers of neuropathic itch. Finally, we demonstrate that neutrophils are required for induction of CXCL10, a ligand of the CXCR3 receptor that promotes itch via activation of sensory neurons, and we find that that CXCR3 antagonism attenuates chronic itch. Chronic itch is a debilitating disorder that can last for months or years. Eczema, or atopic dermatitis, is the most common cause for chronic itch, affecting one in ten people worldwide. Many treatments for the condition are ineffective, and the exact cause of the disease is unknown, but many different types of cells are likely involved. These include skin cells and inflammation-promoting immune cells, as well as nerve cells that detect inflammation, relay itch and pain information to the brain, and regulate the immune system. Learning more about how these cells interact in eczema may help scientists find better treatments for the condition. So far, a lot of research has focused on static ‘snapshots’ of mature eczema lesions from human skin or animal models. These studies have identified abnormalities in genes or cells, but have not revealed how these genes and cells interact over time to cause chronic itch and inflammation. Now, Walsh et al. reveal that immune cells called neutrophils trigger chronic itch in eczema. The experiments involved mice with a condition that mimics eczema, and showed that removing the neutrophils in these mice alleviated their itching. They also showed that dramatic and rapid changes occur in the nervous system of mice suffering from the eczema-like condition. For example, excess nerves grow in the animals’ damaged skin, genes in the nerves that detect sensations become hyperactive, and changes occur in the spinal cord that have been linked to nerve pain. When neutrophils are absent, these changes do not take place. These findings show that neutrophils play a key role in chronic itch and inflammation in eczema. Drugs that target neutrophils, which are already used to treat other diseases, might help with chronic itch, but they would need to be tested before they can be used on people with eczema.
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Affiliation(s)
- Carolyn M Walsh
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States
| | - Rose Z Hill
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States
| | | | - Jacques Deguine
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States
| | - Emily C Brock
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States
| | - Natalie Kucirek
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States
| | - Ziad Rifi
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States
| | - Jessica Wei
- Vision Science Program, School of Optometry, University of California, Berkeley, Berkeley, United States
| | - Karsten Gronert
- Vision Science Program, School of Optometry, University of California, Berkeley, Berkeley, United States
| | - Rachel B Brem
- Department of Plant and Microbial Biology, University of California, Berkeley, Berkeley, United States.,Buck Institute for Research on Aging, Novato, United States
| | - Gregory M Barton
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States
| | - Diana M Bautista
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States.,Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, United States
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8
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Herpes Simplex Virus 1 MicroRNA miR-H28 Exported to Uninfected Cells in Exosomes Restricts Cell-to-Cell Virus Spread by Inducing Gamma Interferon mRNA. J Virol 2019; 93:JVI.01005-19. [PMID: 31413129 DOI: 10.1128/jvi.01005-19] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 08/01/2019] [Indexed: 12/27/2022] Open
Abstract
An earlier report showed that herpes simplex virus 1 (HSV-1) expresses two microRNAs (miRNAs), miR-H28 and miR-H29, late in the infectious cycle. The miRNAs are packed in exosomes and, in recipient cells, restrict the transmission of virus from infected cells to uninfected cells. We now report that (i) miR-H28 induced the synthesis of gamma interferon (IFN-γ) in both infected cells and cells transfected with miR-H28, (ii) IFN-γ accumulated concurrently with viral proteins in infected cells, (iii) IFN-γ was produced in HEp-2 cells derived from cancer tissue and in HEK293T cells derived from normal tissue, and (iv) HSV-1 replication was affected by exposure to IFN-γ before infection but not during or after infection. The results presented in this report support the growing body of evidence indicating that HSV-1 encodes functions designed to reduce the spread of infection from infected cells to uninfected cells, possibly in order to maximize the transmission of virus from infected individuals to uninfected individuals.IMPORTANCE In this report, we show that IFN-γ is produced by HSV-1 viral miR-H28 and viral replication is blocked in cells exposed to IFN-γ before infection but not during or after infection. The inevitable conclusion is that HSV-1 induces IFN-γ to curtail its spread from infected cells to uninfected cells. In essence, this report supports the hypothesis that HSV-1 encodes functions that restrict the transmission of virus from cell to cell.
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9
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Piaszyk-Borychowska A, Széles L, Csermely A, Chiang HC, Wesoły J, Lee CK, Nagy L, Bluyssen HAR. Signal Integration of IFN-I and IFN-II With TLR4 Involves Sequential Recruitment of STAT1-Complexes and NFκB to Enhance Pro-inflammatory Transcription. Front Immunol 2019; 10:1253. [PMID: 31231385 PMCID: PMC6558219 DOI: 10.3389/fimmu.2019.01253] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 05/17/2019] [Indexed: 12/18/2022] Open
Abstract
Atherosclerosis is a chronic inflammatory disease of the blood vessels, characterized by atherosclerotic lesion formation. Vascular Smooth Muscle Cells (VSMC), macrophages (MΦ), and dendritic cells (DC) play a crucial role in vascular inflammation and atherosclerosis. Interferon (IFN)α, IFNγ, and Toll-like receptor (TLR)4 activate pro-inflammatory gene expression and are pro-atherogenic. Gene expression regulation of many pro-inflammatory genes has shown to rely on Signal Integration (SI) between IFNs and TLR4 through combinatorial actions of the Signal Transducer and Activator of Transcription (STAT)1 complexes ISGF3 and γ-activated factor (GAF), and Nuclear Factor-κB (NFκB). Thus, IFN pre-treatment (“priming”) followed by LPS stimulation leads to enhanced transcriptional responses as compared to the individual stimuli. To characterize the mechanism of priming-induced IFNα + LPS- and IFNγ + LPS-dependent SI in vascular cells as compared to immune cells, we performed a comprehensive genome-wide analysis of mouse VSMC, MΦ, and DC in response to IFNα, IFNγ, and/or LPS. Thus, we identified IFNα + LPS or IFNγ + LPS induced genes commonly expressed in these cell types that bound STAT1 and p65 at comparable γ-activated sequence (GAS), Interferon-stimulated response element (ISRE), or NFκB sites in promoter proximal and distal regions. Comparison of the relatively high number of overlapping ISRE sites in these genes unraveled a novel role of ISGF3 and possibly STAT1/IRF9 in IFNγ responses. In addition, similar STAT1-p65 co-binding modes were detected for IFNα + LPS and IFNγ + LPS up-regulated genes, which involved recruitment of STAT1 complexes preceding p65 to closely located GAS/NFκB or ISRE/NFκB composite sites already upon IFNα or IFNγ treatment. This STAT1-p65 co-binding significantly increased after subsequent LPS exposure and correlated with histone acetylation, PolII recruitment, and amplified target gene transcription in a STAT1-p65 co-bound dependent manner. Thus, co-binding of STAT1-containing transcription factor complexes and NFκB, activated by IFN-I or IFN-II together with LPS, provides a platform for robust transcriptional activation of pro-inflammatory genes. Moreover, our data offer an explanation for the comparable effects of IFNα or IFNγ priming on TLR4-induced activation in vascular and immune cells, with important implications in atherosclerosis.
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Affiliation(s)
| | - Lajos Széles
- Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary
| | - Attila Csermely
- Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary
| | - Hsin-Chien Chiang
- Graduate Institute of Immunology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Joanna Wesoły
- Laboratory of High Throughput Technologies, Adam Mickiewicz University, Poznan, Poland
| | - Chien-Kuo Lee
- Graduate Institute of Immunology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Laszlo Nagy
- Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary.,Departments of Medicine and Biological Chemistry, Johns Hopkins All Children's Hospital, Johns Hopkins University School of Medicine, St. Petersburg, FL, United States
| | - Hans A R Bluyssen
- Department of Human Molecular Genetics, Adam Mickiewicz University, Poznan, Poland
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10
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Ting CH, Chen YC, Chen JY. Nile tilapia fry fed on antimicrobial peptide Epinecidin-1-expressing Artemia cyst exhibit enhanced immunity against acute bacterial infection. FISH & SHELLFISH IMMUNOLOGY 2018; 81:37-48. [PMID: 29981882 DOI: 10.1016/j.fsi.2018.07.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 06/25/2018] [Accepted: 07/04/2018] [Indexed: 06/08/2023]
Abstract
Artemia are often used as a live feed for fry in aquaculture. We have previously demonstrated that supplementing adult zebrafish feed with Artemia, which express an Epinephelus coioides-derived antimicrobial peptide, Epinecidin-1 (Epi-1), protects against bacterial infection. Thus, Artemia may serve as a bioreactor for producing biofunctional molecules. However, the application of Epi-1 transgenic Artemia in larval aquaculture of commercial fish species has not been investigated. Here we used a Tol2-transposon system to generate stable Epi-1 expressing Artemia. Nile tilapia (Oreochromis niloticus) fry were then fed with decapsulated transgenic cysts and acutely challenged with Gram-positive Streptococcus iniae or Gram-negative Vibrio vulnificus (204). Survival analysis revealed that tilapia fry fed with Epi-1 transgenic cysts were resistant to acute bacterial infection. Immune-related gene expression profiling showed that S. iniae and V. vulnificus inoculations produced distinct immunomodulatory effects in the tilapia fry. Upon S. iniae infection, tilapia fry fed on control diet exhibited an immune response dominated by Tlr-7/MyD88, wherein Tnf-α, Il-8 and Cxcl-10 expression were all induced; conversely, the tilapia fry fed with Epi-1 transgenic cysts showed a Tlr-2/Tlr-5-dominant immune response, marked by the induction of Il-1β, Il-8 and Il-12 expression. However, after V. vulnificus (204) infection control fry exhibited a Tlr-2/MyD88/Traf-6-dominant response with activation of Tnf-α and Il-8 expression; meanwhile tilapia fry fed on Epi-1 transgenic cyst showed a dominant Tlr-2/Tlr-5-mediated immune response, including induction of Il-1β, Il-8, Il-12, and Cxcl-10 expression. These findings suggest that feeding larval fish fry with Epi-1 transgenic Artemia cysts confers enhanced immunity toward bacterial challenge. Epi-1 transgenic cysts should therefore be considered as a potential functional feed for larval aquaculture.
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Affiliation(s)
- Chen-Hung Ting
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, 23-10, Dahuen Road, Jiaushi, Ilan, 262, Taiwan
| | - Yi-Chun Chen
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, 23-10, Dahuen Road, Jiaushi, Ilan, 262, Taiwan
| | - Jyh-Yih Chen
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, 23-10, Dahuen Road, Jiaushi, Ilan, 262, Taiwan.
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11
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Nastase MV, Zeng-Brouwers J, Beckmann J, Tredup C, Christen U, Radeke HH, Wygrecka M, Schaefer L. Biglycan, a novel trigger of Th1 and Th17 cell recruitment into the kidney. Matrix Biol 2018; 68-69:293-317. [DOI: 10.1016/j.matbio.2017.12.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 12/10/2017] [Accepted: 12/10/2017] [Indexed: 12/11/2022]
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12
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Unger A, Finkernagel F, Hoffmann N, Neuhaus F, Joos B, Nist A, Stiewe T, Visekruna A, Wagner U, Reinartz S, Müller-Brüsselbach S, Müller R, Adhikary T. Chromatin Binding of c-REL and p65 Is Not Limiting for Macrophage IL12B Transcription During Immediate Suppression by Ovarian Carcinoma Ascites. Front Immunol 2018; 9:1425. [PMID: 29997615 PMCID: PMC6030372 DOI: 10.3389/fimmu.2018.01425] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Accepted: 06/08/2018] [Indexed: 12/14/2022] Open
Abstract
Tumors frequently exploit homeostatic mechanisms that suppress expression of IL-12, a central mediator of inflammatory and anti-tumor responses. The p40 subunit of the IL-12 heterodimer, encoded by IL12B, is limiting for these functions. Ovarian carcinoma patients frequently produce ascites which exerts immunosuppression by means of soluble factors. The NFκB pathway is necessary for transcription of IL12B, which is not expressed in macrophages freshly isolated from ascites. This raises the possibility that ascites prevents IL12B expression by perturbing NFκB binding to chromatin. Here, we show that ascites-mediated suppression of IL12B induction by LPS plus IFNγ in primary human macrophages is rapid, and that suppression can be reversible after ascites withdrawal. Nuclear translocation of the NFκB transcription factors c-REL and p65 was strongly reduced by ascites. Surprisingly, however, their binding to the IL12B locus and to CXCL10, a second NFκB target gene, was unaltered, and the induction of CXCL10 transcription was not suppressed by ascites. These findings indicate that, despite its reduced nuclear translocation, NFκB function is not generally impaired by ascites, suggesting that ascites-borne signals target additional pathways to suppress IL12B induction. Consistent with these data, IL-10, a clinically relevant constituent of ascites and negative regulator of NFκB translocation, only partially recapitulated IL12B suppression by ascites. Finally, restoration of a defective IL-12 response by appropriate culture conditions was observed only in macrophages from a subset of donors, which may have important implications for the understanding of patient-specific immune responses.
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Affiliation(s)
- Annika Unger
- Institute for Molecular Biology and Tumor Research (IMT), Center for Tumor Biology and Immunobiology (ZTI), Philipps University of Marburg, Marburg, Germany
| | - Florian Finkernagel
- Institute for Molecular Biology and Tumor Research (IMT), Center for Tumor Biology and Immunobiology (ZTI), Philipps University of Marburg, Marburg, Germany
| | - Nathalie Hoffmann
- Experimental Tumor Research Group, Center for Tumor Biology and Immunobiology (ZTI), Philipps University of Marburg, Marburg, Germany
| | - Felix Neuhaus
- Institute for Molecular Biology and Tumor Research (IMT), Center for Tumor Biology and Immunobiology (ZTI), Philipps University of Marburg, Marburg, Germany
| | - Barbara Joos
- Institute for Molecular Biology and Tumor Research (IMT), Center for Tumor Biology and Immunobiology (ZTI), Philipps University of Marburg, Marburg, Germany
| | - Andrea Nist
- Genomics Core Facility, ZTI, Philipps University of Marburg, Marburg, Germany
| | - Thorsten Stiewe
- Genomics Core Facility, ZTI, Philipps University of Marburg, Marburg, Germany
| | - Alexander Visekruna
- Institute for Medical Microbiology and Hygiene, Biomedical Research Center (BMFZ), Philipps University of Marburg, Marburg, Germany
| | - Uwe Wagner
- Clinic for Gynecology, Gynecological Oncology and Gynecological Endocrinology, Philipps University of Marburg, Marburg, Germany
| | - Silke Reinartz
- Clinic for Gynecology, Gynecological Oncology and Gynecological Endocrinology, ZTI, Philipps University of Marburg, Marburg, Germany
| | - Sabine Müller-Brüsselbach
- Institute for Molecular Biology and Tumor Research (IMT), Center for Tumor Biology and Immunobiology (ZTI), Philipps University of Marburg, Marburg, Germany
| | - Rolf Müller
- Institute for Molecular Biology and Tumor Research (IMT), Center for Tumor Biology and Immunobiology (ZTI), Philipps University of Marburg, Marburg, Germany
| | - Till Adhikary
- Institute for Molecular Biology and Tumor Research (IMT), Center for Tumor Biology and Immunobiology (ZTI), Philipps University of Marburg, Marburg, Germany
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13
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Gauthier M, Chakraborty K, Oriss TB, Raundhal M, Das S, Chen J, Huff R, Sinha A, Fajt M, Ray P, Wenzel SE, Ray A. Severe asthma in humans and mouse model suggests a CXCL10 signature underlies corticosteroid-resistant Th1 bias. JCI Insight 2017; 2:94580. [PMID: 28679952 DOI: 10.1172/jci.insight.94580] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 05/25/2017] [Indexed: 12/18/2022] Open
Abstract
We previously showed that Th1/type 1 inflammation marked by increased IFN-γ levels in the airways can be appreciated in 50% of patients with severe asthma, despite high dose corticosteroid (CS) treatment. We hypothesized that a downstream target of IFN-γ, CXCL10, which recruits Th1 cells via the cognate receptor CXCR3, is an important contributor to Th1high asthma and CS unresponsiveness. We show high levels of CXCL10 mRNA closely associated with IFNG levels in the BAL cells of 50% of severe asthmatics and also in the airways of mice subjected to a severe asthma model, both in the context of high-dose CS treatment. The inability of CS to dampen IFNG or CXCL10 expression was not because of impaired nuclear translocation of the glucocorticoid receptor (GR) or its transactivational functions. Rather, in the presence of CS and IFN-γ, STAT1 and GR were recruited on critical regulatory elements in the endogenous CXCL10 promoter in monocytes, albeit without any abatement of CXCL10 gene expression. High CXCL10 gene expression was also associated with a mast cell signature in both humans and mice, CXCR3 being also expressed by mast cells. These findings suggest that the IFN-γ-CXCL10 axis plays a central role in persistent type 1 inflammation that may be facilitated by CS therapy through GR-STAT1 cooperation converging on the CXCL10 promoter.
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Affiliation(s)
- Marc Gauthier
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
| | | | - Timothy B Oriss
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
| | - Mahesh Raundhal
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
| | - Sudipta Das
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
| | - Jie Chen
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
| | - Rachael Huff
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
| | - Ayan Sinha
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine
| | - Merritt Fajt
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine.,University of Pittsburgh Asthma Institute at University of Pittsburgh Medical Center (UPMC), and
| | - Prabir Ray
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine.,University of Pittsburgh Asthma Institute at University of Pittsburgh Medical Center (UPMC), and.,Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Sally E Wenzel
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine.,University of Pittsburgh Asthma Institute at University of Pittsburgh Medical Center (UPMC), and.,Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Anuradha Ray
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine.,University of Pittsburgh Asthma Institute at University of Pittsburgh Medical Center (UPMC), and.,Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
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14
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Khan MA, Farahvash A, Douda DN, Licht JC, Grasemann H, Sweezey N, Palaniyar N. JNK Activation Turns on LPS- and Gram-Negative Bacteria-Induced NADPH Oxidase-Dependent Suicidal NETosis. Sci Rep 2017; 7:3409. [PMID: 28611461 PMCID: PMC5469795 DOI: 10.1038/s41598-017-03257-z] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 04/27/2017] [Indexed: 01/07/2023] Open
Abstract
Neutrophils cast neutrophil extracellular traps (NETs) to ensnare microbial pathogens. Nevertheless, the molecular rheostats that regulate NETosis in response to bacteria are not clearly established. We hypothesized that stress-activated protein kinase or c-Jun N-terminal Kinase (SAPK/JNK) is a molecular switch that turns on NETosis in response to increasing concentrations of lipopolysaccharide (LPS)- and Gram-negative bacteria. Here we show that Escherichia coli LPS (0111:B4; 10–25 μg/ml), but not phorbol myristate acetate (PMA), activates JNK in human neutrophils in a dose-dependent manner. JNK inhibitors SP600125 and TCSJNK6o, and a TLR4 inhibitor TAK242 suppress reactive oxygen species production and NETosis in LPS-, but not PMA-treated neutrophils. Diphenyleneiodonium suppresses LPS-induced NETosis, confirming that endotoxin induces NADPH oxidase-dependent NETosis. Immunoblots, Sytox Green assays, and confocal microscopy of cleaved caspase-3 and nuclear morphology show that JNK inhibition does not induce apoptosis in LPS-stimulated neutrophils. JNK inhibition also suppresses NETosis induced by two typical Gram-negative bacteria, E. coli and Pseudomonas aeruginosa. Therefore, we propose that neutrophils use a TLR4-dependent, JNK-mediated molecular sensing mechanism to initiate NADPH oxidase-dependent suicidal NETosis in response to increasing concentrations of LPS, and Gram-negative bacteria. The LPS-TLR4-JNK activation axis determines the fate of these cells: to be or not to be NETotic neutrophils.
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Affiliation(s)
- Meraj A Khan
- Program in Translational Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, ON, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
| | - Armin Farahvash
- Program in Translational Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, ON, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
| | - David N Douda
- Program in Translational Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, ON, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
| | - Johann-Christoph Licht
- Program in Translational Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, ON, Canada
| | - Hartmut Grasemann
- Program in Translational Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, ON, Canada.,Departments of Paediatrics and Physiology, University of Toronto, Toronto, ON, Canada.,Institute of Medical Sciences, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Neil Sweezey
- Program in Translational Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, ON, Canada.,Departments of Paediatrics and Physiology, University of Toronto, Toronto, ON, Canada
| | - Nades Palaniyar
- Program in Translational Medicine, Peter Gilgan Centre for Research and Learning, The Hospital for Sick Children, Toronto, ON, Canada. .,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada. .,Institute of Medical Sciences, Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
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15
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Monticelli S, Natoli G. Transcriptional determination and functional specificity of myeloid cells: making sense of diversity. Nat Rev Immunol 2017; 17:595-607. [DOI: 10.1038/nri.2017.51] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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16
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Rohr M, Oleinikov K, Jung M, Sandjo LP, Opatz T, Erkel G. Anti-inflammatory tetraquinane diterpenoids from a Crinipellis species. Bioorg Med Chem 2016; 25:514-522. [PMID: 27887964 DOI: 10.1016/j.bmc.2016.11.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 11/09/2016] [Accepted: 11/11/2016] [Indexed: 12/21/2022]
Abstract
The small pro-inflammatory 10kDa chemokine CXCL10 (Interferon-inducible protein 10, IP-10) plays an important role in mediating immune responses through the activation and recruitment of leukocytes such as T cells, eosinophils, monocytes and NK cells to the sites of inflammation. Elevated levels of CXCL10 have been associated with chronic inflammatory and infectious diseases and therefore CXCL10 represents an attractive target for the development of new anti-inflammatory drugs. In a search for anti-inflammatory compounds from fungi inhibiting the inducible CXCL10 promoter activity, four new tetraquinane diterpenoids, crinipellin E (1), crinipellin F (2), crinipellin G (3) and crinipellin H (4) were isolated from fermentations of a Crinipellis species. The structures of the compounds were elucidated by a combination of one- and two-dimensional NMR spectroscopy and mass spectrometry. Compounds 1, 2, and 3 inhibited the LPS/IFN-γ induced CXCL10 promoter activity in transiently transfected human MonoMac6 cells in a dose-dependent manner with IC50 values of 15μM, 1.5μM, and 3.15μM respectively, whereas compound 4 was devoid of any biological activity. Moreover, compounds 1, 2 and 3 reduced mRNA levels and synthesis of pro-inflammatory mediators such as cytokines and chemokines in LPS/IFN-γ stimulated MonoMac6 cells.
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Affiliation(s)
- Markus Rohr
- Department of Molecular Biotechnology and Systems Biology, University of Kaiserslautern, Paul-Ehrlich-Strasse 23, D-67663 Kaiserslautern, Germany
| | - Katharina Oleinikov
- Department of Molecular Biotechnology and Systems Biology, University of Kaiserslautern, Paul-Ehrlich-Strasse 23, D-67663 Kaiserslautern, Germany
| | - Mathias Jung
- Institute of Biotechnology and Drug Research (IBWF), Erwin-Schrödinger-Strasse 56, D-67663 Kaiserslautern, Germany
| | - Louis P Sandjo
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany; Present address: Department of Pharmaceutical Sciences, Universidade Federal de Santa Catarina, Campus Universitário - Trindade, Florianópolis 88040-970, SC, Brazil
| | - Till Opatz
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany.
| | - Gerhard Erkel
- Department of Molecular Biotechnology and Systems Biology, University of Kaiserslautern, Paul-Ehrlich-Strasse 23, D-67663 Kaiserslautern, Germany.
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17
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Epigenetic regulation of neutrophil development and function. Semin Immunol 2016; 28:83-93. [PMID: 27084194 DOI: 10.1016/j.smim.2016.04.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 04/01/2016] [Accepted: 04/04/2016] [Indexed: 12/14/2022]
Abstract
In addition to performing well-defined effector functions, neutrophils are now recognized as versatile and sophisticated cells with critical immunoregulatory roles. These include the release of a variety of proinflammatory or immunosuppressive cytokines, as well as the expression of genes with regulatory functions. Neutrophils share broad transcriptional features with monocytes, in keeping with the close developmental relation between the two cell types. However, neutrophil-specific gene expression patterns conferring cell type-specific responses to bacterial, viral or fungal components have been identified. Accumulating evidence suggest that these differences reflect the peculiar epigenomic and regulatory landscapes of neutrophils and monocytes, in turn controlled by the specific lineage-determining transcription factors shaping their identity. In this review, we will describe current knowledge on how neutrophil identity and function are controlled at the molecular level, focusing on transcriptional and chromatin regulation of neutrophil development and activation in response to inflammatory stimuli.
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18
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Tecchio C, Cassatella MA. Neutrophil-derived chemokines on the road to immunity. Semin Immunol 2016; 28:119-28. [PMID: 27151246 PMCID: PMC7129466 DOI: 10.1016/j.smim.2016.04.003] [Citation(s) in RCA: 154] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 04/04/2016] [Accepted: 04/05/2016] [Indexed: 12/12/2022]
Abstract
During recent years, it has become clear that polymorphonuclear neutrophils are remarkably versatile cells, whose functions go far beyond phagocytosis and killing. In fact, besides being involved in primary defense against infections-mainly through phagocytosis, generation of toxic molecules, release of toxic enzymes and formation of extracellular traps-neutrophils have been shown to play a role in finely regulating the development and the evolution of inflammatory and immune responses. These latter neutrophil-mediated functions occur by a variety of mechanisms, including the production of newly manufactured cytokines. Herein, we provide a general overview of the chemotactic cytokines/chemokines that neutrophils can potentially produce, either under inflammatory/immune reactions or during their activation in more prolonged processes, such as in tumors. We highlight recent observations generated from studying human or rodent neutrophils in vitro and in vivo models. We also discuss the biological significance of neutrophil-derived chemokines in the context of infectious, neoplastic and immune-mediated diseases. The picture that is emerging is that, given their capacity to produce and release chemokines, neutrophils exert essential functions in recruiting, activating and modulating the activities of different leukocyte populations.
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Affiliation(s)
- Cristina Tecchio
- Department of Medicine, Section of Hematology and Bone Marrow Transplant Unit, University of Verona, Verona, Italy.
| | - Marco A Cassatella
- Department of Medicine, Section of General Pathology, University of Verona, Verona, Italy.
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19
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Masat E, Gasparini C, Agostinis C, Bossi F, Radillo O, De Seta F, Tamassia N, Cassatella MA, Bulla R. RelB activation in anti-inflammatory decidual endothelial cells: a master plan to avoid pregnancy failure? Sci Rep 2015; 5:14847. [PMID: 26463648 PMCID: PMC4604455 DOI: 10.1038/srep14847] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 07/21/2015] [Indexed: 01/17/2023] Open
Abstract
It is known that excessive inflammation at fetal-maternal interface is a key contributor in a compromised pregnancy. Female genital tract is constantly in contact with microorganisms and several strategies must be adopted to avoid pregnancy failure. Decidual endothelial cells (DECs) lining decidual microvascular vessels are the first cells that interact with pro-inflammatory stimuli released into the environment by microorganisms derived from gestational tissues or systemic circulation. Here, we show that DECs are hypo-responsive to LPS stimulation in terms of IL-6, CXCL8 and CCL2 production. Our results demonstrate that DECs express low levels of TLR4 and are characterized by a strong constitutive activation of the non-canonical NF-κB pathway and a low responsiveness of the canonical pathway to LPS. In conclusion, DECs show a unique hypo-responsive phenotype to the pro-inflammatory stimulus LPS in order to control the inflammatory response at feto-maternal interface.
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Affiliation(s)
- Elisa Masat
- Department of Life Sciences, University of Trieste, Trieste, Italy
| | - Chiara Gasparini
- Institute for Maternal and Child Health, IRCCS (Istituto di Ricovero e Cura a Carattere Scientifico) “Burlo Garofolo”, Trieste, Italy
| | - Chiara Agostinis
- Institute for Maternal and Child Health, IRCCS (Istituto di Ricovero e Cura a Carattere Scientifico) “Burlo Garofolo”, Trieste, Italy
| | - Fleur Bossi
- Department of Life Sciences, University of Trieste, Trieste, Italy
| | - Oriano Radillo
- Institute for Maternal and Child Health, IRCCS (Istituto di Ricovero e Cura a Carattere Scientifico) “Burlo Garofolo”, Trieste, Italy
| | - Francesco De Seta
- Department of Life Sciences, University of Trieste, Trieste, Italy
- Institute for Maternal and Child Health, IRCCS (Istituto di Ricovero e Cura a Carattere Scientifico) “Burlo Garofolo”, Trieste, Italy
| | - Nicola Tamassia
- Section of General Pathology, Department of Medicine, School of Medicine, University of Verona, Verona, Italy
| | - Marco A. Cassatella
- Section of General Pathology, Department of Medicine, School of Medicine, University of Verona, Verona, Italy
| | - Roberta Bulla
- Department of Life Sciences, University of Trieste, Trieste, Italy
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20
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Finotti G, Tamassia N, Calzetti F, Fattovich G, Cassatella MA. Endogenously produced TNF-α contributes to the expression of CXCL10/IP-10 in IFN-λ3-activated plasmacytoid dendritic cells. J Leukoc Biol 2015; 99:107-19. [PMID: 26382296 DOI: 10.1189/jlb.3vma0415-144r] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Accepted: 08/28/2015] [Indexed: 12/31/2022] Open
Abstract
The interplay between IFN-λs and dendritic cells is becoming increasingly relevant, particularly in light of their key role in inducing the antiviral state, including in hepatitis C virus infection. In this work, we have analyzed extensively how human plasmacytoid dendritic cells respond to IFN-λ3. We report that plasmacytoid dendritic cells incubated with IFN-λ3 prolong their survival; alter their expression pattern of surface HLA-DRα, CD123, CD86, and CD303; and time dependently produce IFN-α, CXCL10/IFN-γ-induced protein 10, and even modest quantities of TNF-α. Nevertheless, endogenously produced TNF-α, but not IFN-α, was found to be essential for driving the expression of CXCL10/IFN-γ-induced protein 10 in IFN-λ3-treated plasmacytoid dendritic cells, as revealed by neutralizing experiments by use of adalimumab, etanercept, and infliximab. We also observed that based on the kinetics and levels of IFN-α and CXCL10/IFN-γ-induced protein 10 produced by their IFN-λ3-treated plasmacytoid dendritic cells, healthy donors could be categorized into 2 and 3 groups, respectively. In particular, we identified a group of donors whose plasmacytoid dendritic cells produced modest quantities of CXCL10/IFN-γ-induced protein 10; another one whose plasmacytoid dendritic cells produced elevated CXCL10/IFN-γ-induced protein 10 levels, already after 18 h, declining thereafter; and a 3rd group characterized by plasmacytoid dendritic cells releasing very high CXCL10/IFN-γ-induced protein 10 levels after 42 h only. Finally, we report that in plasmacytoid dendritic cells, equivalent concentrations of IFN-λ3 and IFN-λ1 promote survival, antigen modulation, and cytokine production in a comparable manner and without acting additively/synergistically. Altogether, data not only extend the knowledge on the biologic effects that IFN-λs exert on plasmacytoid dendritic cells but also add novel light to the networking between IFN-λs and plasmacytoid dendritic cells in fighting viral diseases.
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Affiliation(s)
- Giulia Finotti
- Department of Medicine, Sections of *General Pathology and Gastroenterology, University of Verona, Verona, Italy
| | - Nicola Tamassia
- Department of Medicine, Sections of *General Pathology and Gastroenterology, University of Verona, Verona, Italy
| | - Federica Calzetti
- Department of Medicine, Sections of *General Pathology and Gastroenterology, University of Verona, Verona, Italy
| | - Giovanna Fattovich
- Department of Medicine, Sections of *General Pathology and Gastroenterology, University of Verona, Verona, Italy
| | - Marco A Cassatella
- Department of Medicine, Sections of *General Pathology and Gastroenterology, University of Verona, Verona, Italy
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21
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Sikorski K, Wesoly J, Bluyssen HAR. Data mining of atherosclerotic plaque transcriptomes predicts STAT1-dependent inflammatory signal integration in vascular disease. Int J Mol Sci 2014; 15:14313-31. [PMID: 25196434 PMCID: PMC4159852 DOI: 10.3390/ijms150814313] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 07/29/2014] [Accepted: 08/01/2014] [Indexed: 01/02/2023] Open
Abstract
Atherosclerotic plaque development involves multiple extra- and intra-cellular signals engaging cells from the immune system and from the vasculature. Pro-inflammatory pathways activated by interferon gamma (IFNγ) and toll-like receptor 4 (TLR4) ligands are profoundly involved in plaque formation and have been shown to involve cross-talk in all atheroma-interacting cell types leading to increased activation of signal transducer and activator of transcription-1 (STAT1) and elevated expression of pro-inflammatory mediators. Here we demonstrate that in Gene Expression Omnibus repository (GEO) deposited microarray datasets, obtained from human coronary and carotid atherosclerotic plaques, a significant increase in expression of pro-inflammatory and immunomodulatory genes can be detected. Moreover, increased expression of multiple chemokines, adhesion molecules and matrix-remodeling molecules was commonly detected in both plaque types and correlated with the presence of putative STAT1 binding sites in their promoters, suggesting strong involvement of STAT1 in plaque development. We also provide evidence to suggest that STAT1-nuclear factor kappa-light-chain-enhancer of activated B cells (NFκB) or STAT1-interferon-regulated factor (IRF) regulatory modules are over-represented in the promoters of these inflammatory genes, which points to a possible contribution of IFNγ and TLR4 cross-talk in the process of atherogenesis. Finally, a subset of these genes encodes for secreted proteins that could serve as a basis of a non-invasive diagnostic assay. The results of our in silico analysis in vitro provide potential evidence that STAT1-dependent IFNγ-TLR4 cross-talk plays a crucial role in coronary and carotid artery plaque development and identifies a STAT1-dependent gene signature that could represent a novel diagnostic tool to monitor and diagnose plaque progression in human atherosclerosis.
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Affiliation(s)
- Krzysztof Sikorski
- Department of Human Molecular Genetics, Adam Mickiewicz University in Poznan, Poznan 61-614, Poland.
| | - Joanna Wesoly
- Laboratory of High-Throughput Technologies, Institute of Molecular Biology and Biotechnology, Adam Mickiewicz University, Umultowska 89, Poznan 61-614, Poland.
| | - Hans A R Bluyssen
- Department of Human Molecular Genetics, Adam Mickiewicz University in Poznan, Poznan 61-614, Poland.
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22
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Hou Y, Lin H, Zhu L, Liu Z, Hu F, Shi J, Yang T, Shi X, Guo H, Tan X, Zhang L, Wang Q, Li Z, Zhao Y. The inhibitory effect of IFN-γ on protease HTRA1 expression in rheumatoid arthritis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2014; 193:130-8. [PMID: 24907345 DOI: 10.4049/jimmunol.1302700] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The high temperature requirement A1 (HTRA1) is a potent protease involved in many diseases, including rheumatoid arthritis (RA). However, the regulatory mechanisms that control HTRA1 expression need to be determined. In this study, we demonstrated that IFN-γ significantly inhibited the basal and LPS-induced HTRA1 expression in fibroblasts and macrophages, which are two major cells for HTRA1 production in RA. Importantly, the inhibitory effect of IFN-γ on HTRA1 expression was evidenced in collagen-induced arthritis (CIA) mouse models and in human RA synovial cells. In parallel with the enhanced CIA incidence and pathological changes in IFN-γ-deficient mice, HTRA1 expression in the joint tissues was also increased as determined by real-time PCR and Western blots. IFN-γ deficiency increased the incidence of CIA and the pathological severity in mice. Neutralization of HTRA1 by Ab significantly reversed the enhanced CIA frequency and severity in IFN-γ-deficient mice. Mechanistically, IFN-γ negatively controls HTRA1 expression through activation of p38 MAPK/STAT1 pathway. Dual luciferase reporter assay and chromatin immunoprecipitation analysis showed that STAT1 could directly bind to HTRA1 promoter after IFN-γ stimulation. This study offers new insights into the molecular regulation of HTRA1 expression and its role in RA pathogenesis, which may have significant impact on clinical therapy for RA and possibly other HTRA1-related diseases, including osteoarthritis, age-related macular degeneration, and cancer.
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MESH Headings
- Animals
- Arthritis, Rheumatoid/chemically induced
- Arthritis, Rheumatoid/genetics
- Arthritis, Rheumatoid/immunology
- Arthritis, Rheumatoid/metabolism
- Cell Line
- Collagen/toxicity
- Disease Models, Animal
- Gene Expression Regulation, Enzymologic/drug effects
- Gene Expression Regulation, Enzymologic/genetics
- Gene Expression Regulation, Enzymologic/immunology
- High-Temperature Requirement A Serine Peptidase 1
- Humans
- Interferon-gamma/genetics
- Interferon-gamma/immunology
- Interferon-gamma/metabolism
- Joints/immunology
- Joints/metabolism
- Joints/pathology
- Lipopolysaccharides/toxicity
- Mice
- Mice, Knockout
- Promoter Regions, Genetic/immunology
- STAT1 Transcription Factor/genetics
- STAT1 Transcription Factor/immunology
- STAT1 Transcription Factor/metabolism
- Serine Endopeptidases/biosynthesis
- Serine Endopeptidases/genetics
- Serine Endopeptidases/immunology
- p38 Mitogen-Activated Protein Kinases/genetics
- p38 Mitogen-Activated Protein Kinases/immunology
- p38 Mitogen-Activated Protein Kinases/metabolism
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Affiliation(s)
- Yuzhu Hou
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Haijiang Lin
- Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA 02114
| | - Linnan Zhu
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhaoting Liu
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Fanlei Hu
- Department of Rheumatology and Immunology, Clinical Immunology Center, Peking University People's Hospital, Beijing 100044, China
| | - Jianfeng Shi
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tao Yang
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaoyun Shi
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; General Hospital of Chinese People's Armed Police Forces, Beijing 100039, China
| | - Huifang Guo
- Department of Rheumatology, Second Hospital of Hebei Medical University, Shijiazhuang 050000, China; and
| | - Xiaotian Tan
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Lianfeng Zhang
- Key Laboratory of Human Diseases Comparative Medicine, Ministry of Health, and Institute of Laboratory Animal Science, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Qiang Wang
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China;
| | - Zhanguo Li
- Department of Rheumatology and Immunology, Clinical Immunology Center, Peking University People's Hospital, Beijing 100044, China;
| | - Yong Zhao
- State Key Laboratory of Biomembrane and Membrane Biotechnology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China;
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23
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Aomatsu M, Kato T, Kasahara E, Kitagawa S. Gender difference in tumor necrosis factor-α production in human neutrophils stimulated by lipopolysaccharide and interferon-γ. Biochem Biophys Res Commun 2013; 441:220-5. [PMID: 24140406 DOI: 10.1016/j.bbrc.2013.10.042] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Accepted: 10/09/2013] [Indexed: 12/24/2022]
Abstract
The gender difference in tumor necrosis factor-α (TNF-α) production in human neutrophils stimulated by lipopolysaccharide (LPS) and interferon-γ (IFN-γ) was explored by using peripheral blood neutrophils from young men and women. As compared with female neutrophils, male neutrophils released greater amounts of TNF-α, and exhibited stronger activation of mitogen-activated protein kinases and phosphatidylinositol 3-kinase in response to LPS stimulation. LPS-induced TNF-α production was markedly enhanced by pretreatment of cells with IFN-γ, and IFN-γ-mediated priming in male neutrophils was significantly greater than that in female neutrophils. Male neutrophils showed higher expression of TLR4, but not IFN-γ receptors, than female neutrophils, and its expression was increased by stimulation with IFN-γ or IFN-γ plus LPS. These findings indicate that male neutrophils show higher responsiveness to stimulation with LPS and IFN-γ than female neutrophils, and suggest that the gender difference in neutrophil responsiveness to LPS and IFN-γ is partly responsible for that in the outcome of sepsis, in which premenopausal women show a favorable prognosis as compared with men.
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Affiliation(s)
- Megumi Aomatsu
- Department of Physiology, Osaka City University, Graduate School of Medicine, Asahi-machi, Abeno-ku, Osaka 545-8585, Japan
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24
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Bocian C, Urbanowitz AK, Owens RT, Iozzo RV, Götte M, Seidler DG. Decorin potentiates interferon-γ activity in a model of allergic inflammation. J Biol Chem 2013; 288:12699-711. [PMID: 23460644 DOI: 10.1074/jbc.m112.419366] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The proteoglycan decorin modulates leukocyte recruitment during delayed-type hypersensitivity responses. Decorin-deficient (Dcn(-/-)) mice show reduced edema formation during the first 24 h with a concurrent attenuated recruitment of CD8(+) leukocytes in the inflamed Dcn(-/-) ears. The aim of this study was to elucidate the molecular pathways affected by the loss of decorin. In vivo, reduced numbers of CD8(+) cells in Dcn(-/-) ears correlated with a reduced interferon-γ (Ifn-γ) and CXCL-10 expression. In vitro, Dcn(-/-) lymphocytes displayed an increased adhesion to brain microvascular (bEnd.3) endothelial cells. Decorin treatment of bEnd.3 increased Icam1 and down-regulated Vcam1 expression after TNF-α stimulation. However, Dcn(-/-) and wild-type lymphocytes produced IFN-γ after activation with CD3ε. Upon incubation with decorin, endothelial cells and fibroblasts responded differently to IFN-γ and TNF-α; CCL2 in bEnd.3 cells was more prominently up-regulated by TNF-α compared with IFN-γ. Notably, both factors were more potent in the presence of decorin. Compared with TNF-α, IFN-γ treatment induced significantly more CXCL-10, and both factors increased synthesis of CXCL-10 in the presence of decorin. The response to IFN-γ was similar in Dcn(-/-) and wild-type fibroblasts, an additional source of CXCL-10. However, addition of decorin yielded significantly more CXCL-10. Notably, decorin increased the stability of IFN-γ in vitro and potentiated IFN-γ-induced activation of STAT-1. Furthermore, only dermatan sulfate influenced IFN-γ signaling by significantly increasing CXCL-10 expression in contrast to decorin protein core alone. Our data demonstrate that decorin modulates delayed-type hypersensitivity responses by augmenting the induction of downstream effector cytokines of IFN-γ and TNF-α, thereby influencing the recruitment of CD8(+) lymphocytes into the inflamed tissue.
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Affiliation(s)
- Carla Bocian
- Institute of Physiological Chemistry and Pathobiochemistry, Waldeyerstrasse 15, 48149 Münster, Germany
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25
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Brisevac D, Bjelobaba I, Bajic A, Clarner T, Stojiljkovic M, Beyer C, Andjus P, Kipp M, Nedeljkovic N. Regulation of ecto-5′-nucleotidase (CD73) in cultured cortical astrocytes by different inflammatory factors. Neurochem Int 2012; 61:681-8. [DOI: 10.1016/j.neuint.2012.06.017] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2011] [Revised: 06/12/2012] [Accepted: 06/21/2012] [Indexed: 12/16/2022]
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26
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Bartoskova A, Turanek-Knotigova P, Matiasovic J, Oreskovic Z, Vicenova M, Stepanova H, Ondrackova P, Vitasek R, Leva L, Moore PF, Faldyna M. γδ T lymphocytes are recruited into the inflamed uterus of bitches suffering from pyometra. Vet J 2012; 194:303-8. [PMID: 22771147 DOI: 10.1016/j.tvjl.2012.05.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 05/12/2012] [Accepted: 05/23/2012] [Indexed: 12/23/2022]
Abstract
Very little is known about the occurrence of immune system cells in the canine uterus. The aim of this study was to generate information about lymphocyte subsets that are present in the healthy canine uterus and that are recruited under inflammatory conditions caused by pyometra. Using immunohistochemistry and flow cytometry, a significant influx of γδ T lymphocytes was found in pyometra samples mainly due to recruitment of γδ(+)/CD8(-) T lymphocytes. The relative expression of genes encoding selected cytokines/chemokines was evaluated in samples from healthy and pyometra-affected uteri. Expression of pro-inflammatory cytokines (including IL-1β, TNF-α, IL-8, IL-17 and IFN-γ) and chemokines (including CXCL10, CCL4 and CCL5) was upregulated in pyometra samples confirming the presence of inflammation. In contrast, the expression of the homeostatic chemokine CCL25 and of the anti-inflammatory cytokine IL-10 was downregulated and unchanged, respectively.
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Affiliation(s)
- A Bartoskova
- Faculty of Veterinary Medicine, University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic
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27
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Tamassia N, Bazzoni F, Le Moigne V, Calzetti F, Masala C, Grisendi G, Bussmeyer U, Scutera S, De Gironcoli M, Costantini C, Musso T, Cassatella MA. IFN-β expression is directly activated in human neutrophils transfected with plasmid DNA and is further increased via TLR-4-mediated signaling. THE JOURNAL OF IMMUNOLOGY 2012; 189:1500-9. [PMID: 22730532 DOI: 10.4049/jimmunol.1102985] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Upon LPS binding, TLR4 activates a MyD88-dependent pathway leading to the transcriptional activation of proinflammatory genes, as well as a MyD88-independent/TRIF-dependent pathway, responsible for the transcriptional induction of IFN-β. Previous findings delineated that human neutrophils are unable to induce the transcription of IFN-β in response to TLR4 stimulation. Because neutrophils do not express protein kinase C ε, a molecule recently reported as essential for initiating the MyD88-independent/TRIF-dependent pathway, we optimized an electroporation method to transfect PKCε into neutrophils with very high efficiency. By doing so, a significant IFN-β mRNA expression was induced, in the absence of LPS stimulation, not only in PKCε-overexpressing neutrophils but also in cells transfected with a series of empty DNA plasmids; however, LPS further upregulated the IFN-β transcript levels in plasmid-transfected neutrophils, regardless of PKCε overexpression. Phosphoimmunoblotting studies, as well as chromatin immunoprecipitation assays targeting the IFN-β promoter, revealed that IFN-β mRNA induction occurred through the cooperative action of IRF3, activated by transfected DNA, and NF-κB, activated by LPS. Additional immunoblotting and coimmunoprecipitation studies revealed that neutrophils constitutively express various cytosolic DNA sensors, including IFN-inducible protein 16, leucine-rich repeat (in Flightless I) interacting protein-1, and DDX41, as well as that IFN-inducible protein 16 is the intracellular receptor recognizing transfected DNA. Consistently, infection of neutrophils with intracellular pathogens, such as Bartonella henselae, Listeria monocytogenes, Legionella pneumophila, or adenovirus type 5, promoted a marked induction of IFN-β mRNA expression. Taken together, these data raise questions about the role of PKCε in driving the MyD88-independent/TRIF-dependent response and indicate that human neutrophils are able to recognize and respond to microbial cytosolic DNA.
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Affiliation(s)
- Nicola Tamassia
- Section of General Pathology, Department of Pathology and Diagnostics, University of Verona, 37134 Verona, Italy
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28
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3'-Demethyldihydromaldoxin and dihydromaldoxin, two anti-inflammtory diaryl ethers from a Steganospora species. J Antibiot (Tokyo) 2012; 65:473-7. [PMID: 22692347 DOI: 10.1038/ja.2012.46] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
CXCL10 (IP-10) is a highly inducible chemoattractant, which contributes to the recruitment of inflammatory cells such as macrophages and T-lymphocytes and thereby has important roles in chronic inflammatory conditions. In a search for new inhibitors of CXCL10 expression in MonoMac6 (MM6) cells, the new diaryl ether 3'-demethyldihydromaldoxin (1) along with the known compound dihydromaldoxin (2), were isolated from fermentations of a Steganospora species. The structures of the compounds were elucidated by a combination of one- and two-dimensional NMR spectroscopy and mass spectrometry. Compounds (1) and (2) inhibited lipopolysaccharide (LPS)/interferon-γ (IFN-γ)-induced CXCL10 promoter activity in transiently transfected MM6 cells in a dose-dependent manner with IC(50) values of 39-41 μM and also reduced LPS/IFN-γ-induced CXCL10 protein synthesis and excretion.
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29
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Jung M, Liermann JC, Opatz T, Erkel G. Ganodermycin, a novel inhibitor of CXCL10 expression from Ganoderma applanatum. J Antibiot (Tokyo) 2011; 64:683-686. [PMID: 21792205 DOI: 10.1038/ja.2011.64] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
CXCL10 (inducible protein-10) is a highly inducible chemoattractant, which contributes to the recruitment of inflammatory cells, such as macrophages and T-lymphocytes, and thereby has important roles in chronic inflammatory conditions. In a search for new inhibitors of CXCL10 expression in MonoMac6 cells, a novel compound, designated as Ganodermycin, was isolated from fermentations of the basidiomycete Ganoderma applanatum. The structure was determined by a combination of spectroscopic techniques. Ganodermycin inhibited the lipopolysaccharide (LPS)/interferon (IFN)-γ-induced CXCL10 promoter activity in transiently transfected MonoMac6 cells in a dose-dependent manner with IC(50) values of 15-20 μg ml(-1) (53-71 μM). Ganodermycin also reduced LPS/IFN-γ-induced CXCL10 protein synthesis and excretion.
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Affiliation(s)
- Mathias Jung
- Institute of Biotechnology and Drug Research (IBWF), Kaiserslautern, Germany
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30
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Wuest TR, Thapa M, Zheng M, Carr DJJ. CXCL10 expressing hematopoietic-derived cells are requisite in defense against HSV-1 infection in the nervous system of CXCL10 deficient mice. J Neuroimmunol 2011; 234:103-8. [PMID: 21470697 DOI: 10.1016/j.jneuroim.2011.03.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Accepted: 03/13/2011] [Indexed: 12/31/2022]
Abstract
The chemokine CXCL10 is crucial for the control of viral replication through the regulation of mobilization of antigen-specific T cells to sites of infection. CXCL10 is highly expressed both at sites of inflammation as well as constitutively within lymphoid organs by both bone marrow (BM)-derived and non-BM-derived cells. However, the relative immunologic importance of CXCL10 expressed by these divergent sources relative to HSV-1 infection is unknown. Using mouse chimeras reconstituted with either wild type or CXCL10 deficient mouse BM, we show BM-derived, radiation-sensitive cells from wild type mice were solely responsible for resistance to HSV-1 in the trigeminal ganglia and brain stem. The resistance was not reflected by a deficiency in the recruitment of effector cells to sites of inflammation or expression of chemokines or IFN-gamma and likely results from additional, yet-to-be-determined factors emanating from wild type, BM-derived cells.
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Affiliation(s)
- Todd R Wuest
- Department of Microbiology and Immunology, The University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA
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31
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Martinu T, Kinnier CV, Gowdy KM, Kelly FL, Snyder LD, Jiang D, Foster WM, Garantziotis S, Belperio JA, Noble PW, Palmer SM. Innate immune activation potentiates alloimmune lung disease independent of chemokine (C-X-C motif) receptor 3. J Heart Lung Transplant 2011; 30:717-25. [PMID: 21444213 DOI: 10.1016/j.healun.2011.01.711] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2010] [Revised: 12/08/2010] [Accepted: 01/17/2011] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND Pulmonary graft-versus-host disease (GVHD) after hematopoietic cell transplant (HCT) and allograft rejection after lung transplant are parallel immunologic processes that lead to significant morbidity and mortality. Our murine model of pulmonary GVHD after inhaled lipopolysaccharide (LPS) suggests that innate immune activation potentiates pulmonary transplant-related alloimmunity. We hypothesized that the chemokine (C-X-C motif) receptor 3 (CXCR3) receptor is necessary for the development of LPS-induced pulmonary GVHD. METHODS Recipient mice underwent allogeneic or syngeneic HCT, followed by inhaled LPS. CXCR3 inhibition was performed by using CXCR3-knockout donors or by systemic anti-CXCR3 antibody blockade. Pulmonary histopathology, cellular sub-populations, cytokine proteins, and transcripts were analyzed. RESULTS Compared with the lungs of LPS-unexposed and syngeneic controls, lungs of LPS-exposed allogeneic HCT mice demonstrated prominent lymphocytic peri-vascular and peri-bronchiolar infiltrates. This pathology was associated with increased CD4(+) and CD8(+) T cells as well as an increase in CXCR3 expression on T cells, a 2-fold upregulation of CXCR3 transcript, and a 4-fold increase in its ligand CXCL10/Interferon gamma-induced protein 10 kDa (IP-10). CXCR3 inhibition using gene-knockout strategy or antibody blockade did not change the severity of pulmonary pathology, with a mean pathology score of 6.5 for sufficient vs 6.5 for knockout (p = 1.00) and a mean score of 6.8 for antibody blockade vs 7.4 for control (p = 0.46). CXCR3 inhibition did not prevent CD3 infiltration or prevent production of interleukin-12p40 or significantly change other Th1, Th2, or Th17 cytokines in the lung. CONCLUSIONS In the setting of allogeneic HCT, innate immune activation by LPS potentiates pulmonary GVHD through CXCR3-independent mechanisms. Clinical strategies focused on inhibition of CXCR3 may prove insufficient to ameliorate transplant-related lung disease.
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Affiliation(s)
- Tereza Martinu
- Department of Medicine, Duke University Medical Center, Durham, North Carolina 27710, USA.
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32
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Fukuzono S, Kato T, Fujita H, Watanabe N, Kitagawa S. Granulocyte colony-stimulating factor negatively regulates Toll-like receptor agonist-induced cytokine production in human neutrophils. Arch Biochem Biophys 2010; 495:144-51. [PMID: 20064484 DOI: 10.1016/j.abb.2010.01.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Accepted: 01/06/2010] [Indexed: 10/20/2022]
Abstract
We studied the effect of G-CSF on TLR agonist-induced cytokine production in human neutrophils. Human neutrophils produced IL-8 and TNF-alpha in response to stimulation with TLR agonists such as LPS and N-palmitoyl-S-[2,3-bis(palmitoyloxy)-(2RS)-propyl]-(R)-cysteinyl-seryl-(lysyl)(3)-lysine. This response was dependent on activation of ERK, p38, and PI3K, but not JNK. TLR agonist-induced cytokine production in neutrophils was inhibited by G-CSF, whereas it was enhanced by GM-CSF, and GM-CSF-mediated enhancement was attenuated by G-CSF. G-CSF and GM-CSF did not affect TLR agonist-induced phosphorylation of ERK, p38, JNK, Akt, and IkappaBalpha. STAT3 activation was much greater in G-CSF-stimulated neutrophils than that in GM-CSF-stimulated cells. G-CSF-mediated STAT3 phosphorylation and inhibition of TLR agonist-induced cytokine production were prevented by pretreatment of cells with AG-490 (JAK2 inhibitor). These findings suggest that G-CSF and GM-CSF exert the opposite effects on TLR agonist-induced cytokine production, and G-CSF negatively regulates TLR agonist-induced cytokine production in neutrophils via activation of STAT3.
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Affiliation(s)
- Shunsuke Fukuzono
- Department of Physiology, Osaka City University Graduate School of Medicine, Asahi-machi, Abeno-ku, Japan
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33
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Esmann L, Idel C, Sarkar A, Hellberg L, Behnen M, Möller S, van Zandbergen G, Klinger M, Köhl J, Bussmeyer U, Solbach W, Laskay T. Phagocytosis of apoptotic cells by neutrophil granulocytes: diminished proinflammatory neutrophil functions in the presence of apoptotic cells. THE JOURNAL OF IMMUNOLOGY 2009; 184:391-400. [PMID: 19949068 DOI: 10.4049/jimmunol.0900564] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Neutrophil granulocytes are rapidly recruited from the bloodstream to the site of acute inflammation where they die in large numbers. Because release of toxic substances from dead neutrophils can propagate the inflammatory response leading to tissue destruction, clearance of dying inflammatory neutrophils has a critical function in the resolution of the inflammatory response. Apoptotic neutrophils are phagocytosed primarily by macrophages, provided these cells are present in adequate numbers. However, macrophages are rare at sites of acute inflammation, whereas the number of neutrophils can be extremely high. In the current study, in vitro experiments with human neutrophils were carried out to investigate whether neutrophils can ingest apoptotic neutrophils. We show that naïve granulocytes isolated from venous blood have a limited capacity to phagocytose apoptotic cells. However, exposure to activating stimuli such as LPS, GM-CSF and/or IFN-gamma results in enhanced phagocytosis of apoptotic cells. The efficient uptake of apoptotic cells by neutrophils was found to depend on the presence of heat labile serum factors. Importantly, the contact to or uptake of apoptotic cells inhibited neutrophil functions such as respiratory burst and the release of the proinflammatory cytokines TNF-alpha and interferon-inducible protein-10. Contact to apoptotic cells, however, induced the secretion of IL-8 and growth-related oncogene-alpha, which was independent of NF-kappaB and p38 MAPK but involved C5a and the ERK1/2 pathway. The data suggest that activated neutrophils participate in the clearance of apoptotic cells. In addition, because apoptotic cells inhibit proinflammatory functions of neutrophils, uptake of apoptotic cells by neutrophils contributes to the resolution of inflammation.
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Affiliation(s)
- Lars Esmann
- Institute for Medical Microbiology and Hygiene, University of Lübeck, Lübeck, Germany
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34
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Impairment of gamma interferon signaling in human neutrophils infected with Anaplasma phagocytophilum. Infect Immun 2009; 78:358-63. [PMID: 19858302 DOI: 10.1128/iai.01005-09] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Anaplasma phagocytophilum, the causative agent of tick-borne human granulocytic anaplasmosis (HGA), is an intracellular bacterium which survives and multiplies inside polymorphonuclear neutrophil granulocytes (PMN). Increased bacterial burden in gamma interferon (IFN-gamma)-deficient mice suggested a major role of IFN-gamma in the control of A. phagocytophilum. Here we investigated whether infection of human PMN with A. phagocytophilum impairs IFN-gamma signaling thus facilitating intracellular survival of the bacterium. The secretion of the IFN-gamma-inducible chemokines IP-10/CXCL10 and MIG/CXCL9 was markedly inhibited in infected neutrophils. Molecular analyses revealed that, compared to uninfected PMN, A. phagocytophilum decreased the expression of the IFN-gamma receptor alpha-chain CD119, diminished the IFN-gamma-induced phosphorylation of STAT1, and enhanced the expression of SOCS1 and SOCS3 in PMN. Since IFN-gamma activates various antibacterial effector mechanisms of PMN, the impaired IFN-gamma signaling in infected cells likely contributes to the survival of A. phagocytophilum inside PMN and to HGA disease development.
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Abstract
Polymorphonuclear leukocytes (neutrophils) are the first cells that arrive at sites of infection or injury. There, besides their microorganism-targeted effector functions, activated neutrophils secrete numerous chemoattractants that recruit other leukocyte subtypes into the inflamed tissue. First, neutrophil activation leads to the upregulation of the gene expression of several classical chemokines of the CXC and CC families. Second, neutrophil granules contain preformed intracellular storage pools of chemotactically active proteins that are rapidly released upon neutrophil degranulation. The third pathway of generation of chemotactically active proteins by activated neutrophils--shedding and concomitant proteolytic processing of a membrane protein--has recently been demonstrated in our laboratory. In this review, we summarize the essential features of chemoattractant production by neutrophils and their contribution to orchestrating the recruitment of leukocyte subtypes during inflammatory response.
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Affiliation(s)
- B K Pliyev
- Faculty of Fundamental Medicine, Lomonosov Moscow State University, Moscow, 119192, Russia.
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36
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Bachmann M, Paulukat J, Pfeilschifter J, Mühl H. Molecular mechanisms of IL-18BP regulation in DLD-1 cells: pivotal direct action of the STAT1/GAS axis on the promoter level. J Cell Mol Med 2008; 13:1987-1994. [PMID: 19046253 DOI: 10.1111/j.1582-4934.2008.00604.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Interleukin (IL)-18, formerly known as interferon (IFN)-gamma-inducing factor, is a crucial mediator of host defence and inflammation. Control of IL-18 bioactivity by its endogenous antagonist IL-18 binding protein (IL-18BP) is a major objective of immunoregulation. IL-18BP is strongly up-regulated by IFN-gamma, thereby establishing a negative feedback mechanism detectable in cell culture and in vivo. Here we sought to investigate in D.L. Dexter (DLD) colon carcinoma cells molecular mechanisms of IL-18BP induction under the influence of IFN-gamma. Mutational analysis revealed that a proximal gamma-activated sequence (GAS) at the IL-18BP promoter is of pivotal importance for expression by IFN-gamma-activated cells. Use of siRNA underscored the essential role of the signal transducer and activator of transcription (STAT)-1 in this process. Indeed, electrophoretic mobility shift assay and chromatin immunoprecipitation analysis proved STAT1 binding to this particular GAS site. Maximal expression of IL-18BP was dependent on de novo protein synthesis but unaffected by silencing of interferon regulatory factor-1. Altogether, data presented herein indicate that direct action of STAT1 on the IL-18BP promoter at the proximal GAS element is key to IL-18BP expression by IFN-gamma-stimulated DLD-1 colon carcinoma cells.
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Affiliation(s)
- Malte Bachmann
- Pharmazentrum Frankfurt/ZAFES, University Hospital Goethe-University Frankfurt, Frankfurt am Main, Germany
| | - Jens Paulukat
- Pharmazentrum Frankfurt/ZAFES, University Hospital Goethe-University Frankfurt, Frankfurt am Main, Germany
| | - Josef Pfeilschifter
- Pharmazentrum Frankfurt/ZAFES, University Hospital Goethe-University Frankfurt, Frankfurt am Main, Germany
| | - Heiko Mühl
- Pharmazentrum Frankfurt/ZAFES, University Hospital Goethe-University Frankfurt, Frankfurt am Main, Germany
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Cowburn AS, Condliffe AM, Farahi N, Summers C, Chilvers ER. Advances in neutrophil biology: clinical implications. Chest 2008; 134:606-612. [PMID: 18779195 DOI: 10.1378/chest.08-0422] [Citation(s) in RCA: 132] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Many lung diseases are characterized by neutrophil-dominated inflammation; therefore, an understanding of neutrophil function is of considerable importance to respiratory physicians. This review will focus on recent advances in our understanding of how neutrophils are produced, how these cells leave the circulation, the molecular events regulating neutrophil activation and, ultimately, how these cells die and are removed. The neutrophil is now recognized as a highly versatile and sophisticated cell with significant synthetic capacity and an important role in linking the innate and adaptive arms of the immune response. One of the key challenges in conditions such as COPD, bronchiectasis, cystic fibrosis, and certain forms of asthma is how to manipulate neutrophil function in a way that does not compromise antibacterial and antifungal capacity. The possession by neutrophils of a unique repertoire of surface receptors and signaling proteins may make such targeted therapy possible.
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Affiliation(s)
- Andrew S Cowburn
- Respiratory Medicine Division, Department of Medicine, University of Cambridge School of Clinical Medicine, Addenbrooke's and Papworth Hospitals, Cambridge, UK
| | - Alison M Condliffe
- Respiratory Medicine Division, Department of Medicine, University of Cambridge School of Clinical Medicine, Addenbrooke's and Papworth Hospitals, Cambridge, UK
| | - Neda Farahi
- Respiratory Medicine Division, Department of Medicine, University of Cambridge School of Clinical Medicine, Addenbrooke's and Papworth Hospitals, Cambridge, UK
| | - Charlotte Summers
- Respiratory Medicine Division, Department of Medicine, University of Cambridge School of Clinical Medicine, Addenbrooke's and Papworth Hospitals, Cambridge, UK
| | - Edwin R Chilvers
- Respiratory Medicine Division, Department of Medicine, University of Cambridge School of Clinical Medicine, Addenbrooke's and Papworth Hospitals, Cambridge, UK.
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38
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Ide N, Hirase T, Nishimoto-Hazuku A, Ikeda Y, Node K. Angiotensin II increases expression of IP-10 and the renin-angiotensin system in endothelial cells. Hypertens Res 2008; 31:1257-67. [PMID: 18716376 DOI: 10.1291/hypres.31.1257] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Angiotensin II promotes vascular inflammation, which plays important roles in vascular injury. In this study, we found that angiotensin II-stimulated human endothelial cells increased the release of a CXC chemokine, IP-10, according to an antibody array. IP-10 expression was higher in the endothelium of coronary blood vessels in mice infused with angiotensin II than in control. Quantitative real-time PCR analysis revealed that angiotensin II significantly increased IP-10 mRNA expression compared to control. Pretreatment with valsartan, but not with PD123319, blocked angiotensin II-induced IP-10 mRNA expression. IP-10 levels in conditioned media detected by ELISA increased in response to angiotensin II compared to control, which was blocked by the pretreatment with valsartan. These data indicate that angiotensin II stimulates IP-10 production from endothelial cells via angiotensin II type 1 receptors. In endothelial cells, IP-10 significantly increased mRNA expression of renin, angiotensin-converting enzyme, and angiotensinogen. IP-10 also increased angiotensin II levels in conditioned media compared to control. Angiotensin II significantly increased mRNA expression of renin, angiotensin converting enzyme and angiotensinogen, which was blocked by neutralization of IP-10 with antibody in endothelial cells. IP-10 neutralization with antibody blocked angiotensin II-induced apoptosis and cell senescence in endothelial cells. These data indicate that IP-10 is involved not only in leukocyte-endothelial interaction but also in the circuit of endothelial renin-angiotensin system activation that potentially promotes atherosclerosis.
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Affiliation(s)
- Noriko Ide
- Department of Cardiovascular and Renal Medicine, Saga University Faculty of Medicine, Saga, Japan
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39
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Villar LM. Current concepts in immunology. Expert Rev Clin Immunol 2008; 4:559-64. [PMID: 20476958 DOI: 10.1586/1744666x.4.5.559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The annual Congress of the Spanish Immunology Society is the forum at which clinical immunologists and scientists communicate novel findings in the field. This year's meeting was held in Palma de Mallorca, Spain, from 21 to 24 May 2008. It was opened and organized by Nuria Matamoros, head of the Immunology Department of Hospital Son Dureta, Mallorca, Spain. The meeting comprised an opening lecture, four highly successful plenary sessions, 11 oral and poster sessions where recent results of different groups were shown, four workshops in which interlaboratory studies of quality control on different immune tests were discussed and a closing lecture. Some of the most interesting plenary presentations given at this meeting are summarized.
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Affiliation(s)
- Luisa M Villar
- Department of Immunology, Hospital Ramón y Cajal, Madrid, Spain.
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40
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Characterisation of γ-interferon responsive promoters in fish. Mol Immunol 2008; 45:3454-62. [DOI: 10.1016/j.molimm.2008.03.015] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2008] [Accepted: 03/26/2008] [Indexed: 12/27/2022]
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41
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beta(2)microglobulin mRNA expression levels are prognostic for lymph node metastasis in colorectal cancer patients. Br J Cancer 2008; 98:1999-2005. [PMID: 18506145 PMCID: PMC2441949 DOI: 10.1038/sj.bjc.6604399] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Colorectal cancer (CRC) is the fourth most common non-cutaneous malignancy in the United States and the second most frequent cause of cancer-related death. One of the most important determinants of CRC survival is lymph node metastasis. To determine whether molecular markers might be prognostic for lymph node metastases, we measured by quantitative real-time RT–PCR the expression levels of 15 cancer-associated genes in formalin-fixed paraffin-embedded primary tissues derived from stage I–IV CRC patients with (n=20) and without (n=18) nodal metastases. Using the mean of the 15 genes as an internal reference control, we observed that low expression of β2microglobulin (B2M) was a strong prognostic indicator of lymph node metastases (area under the curve (AUC)=0.85; 95% confidence interval (CI)=0.69–0.94). We also observed that the expression ratio of B2M/Spint2 had the highest prognostic accuracy (AUC=0.87; 95% CI=0.71–0.96) of all potential two-gene combinations. Expression values of Spint2 correlated with the mean of the entire gene set at an R2 value of 0.97, providing evidence that Spint2 serves not as an independent prognostic gene, but rather as a reliable reference control gene. These studies are the first to demonstrate a prognostic role of B2M at the mRNA level and suggest that low B2M expression levels might be useful for identifying patients with lymph node metastasis and/or poor survival.
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42
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Ear T, McDonald PP. Cytokine generation, promoter activation, and oxidant-independent NF-kappaB activation in a transfectable human neutrophilic cellular model. BMC Immunol 2008; 9:14. [PMID: 18405381 PMCID: PMC2322942 DOI: 10.1186/1471-2172-9-14] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2007] [Accepted: 04/11/2008] [Indexed: 01/13/2023] Open
Abstract
Background Human neutrophils are key players of innate immunity, and influence inflammatory and immune reactions through the production of numerous cytokines and chemokines. Despite major advances in our understanding of this important functional response of neutrophils, the short lifespan of these cells and their resistance to transfection have always been an obstacle to the detailed dissection of signaling pathways and effector responses that is often possible in other cell types. Results Here, we report that granulocytic differentiation of human PLB-985 cells with DMSO yields cells that are neutrophil-like with respect to surface markers, acquisition of responsiveness to physiological neutrophil stimuli (fMLP, LPS), cytokine expression and production profile, and transcription factor activation profile (NF-κB, C/EBP, AP-1, STAT). We also show that granulocytic PLB-985 cells can be reliably tranfected by nucleofection in a rapid and efficient manner. Indeed, we overexpressed several proteins and luciferase constructs into these cells. In particular, overexpression of a dominant negative IκB-α confirmed the central role of NF-κB in the production of cytokines by granulocytes. Moreover, the use of PLB-985 granulocytes in which the NADPH oxidase is inactive due to the targeted disruption of a key component (gp91phox) revealed that NF-κB activation and κB-dependent responses are independent of endogenous reactive oxygen intermediates in these cells. Antioxidant studies performed in primary human neutrophils support this conclusion. Conclusion Our results unveil a new facet of the NF-κB system of human granulocytes, and pave the way for deciphering signal transduction pathways and promoter activation in these cells.
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Affiliation(s)
- Thornin Ear
- Pulmonary Division, Faculty of Medicine, Université de Sherbrooke and Centre de recherche du CHUS, Sherbrooke, Qc, Canada.
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