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Liu J, Que K, Liu Y, Zang C, Wen J. Tumor Necrosis Factor-α Regulates the TRPA1 Expression in Human Odontoblast-Like Cells. J Pain Res 2020; 13:1655-1664. [PMID: 32753941 PMCID: PMC7352379 DOI: 10.2147/jpr.s255288] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 06/19/2020] [Indexed: 11/23/2022] Open
Abstract
Purpose Transient receptor potential cation channel, subfamily A, member 1 (TRPA1) is a promiscuous chemical nociceptor involved in the perception of cold hypersensitivity, mechanical hyperalgesia and inflammatory pain in human odontoblasts (HODs). Here, we aimed to study the underlying mechanism in which inflammatory cytokine tumor necrosis factor (TNF)-α regulated the expression of TRPA1 channel at both cellular and subcellular levels. Materials and Methods Immunohistochemistry was used to confirm the expression of TRPA1 channel in HODs. Dental pulp cells were induced and differentiated to HOD-like cells and used in succedent experiments. Real-time quantitative polymerase chain reaction assay and Western blotting were used to examine the expression changes of TRPA1 channel with the presence and absence of TNF-α and TNF receptor (TNFR) inhibitor, R 7050. Finally, immunoelectron microscopy (IEM) and quantitative analysis were performed to directly display the TNF-α-regulated distribution change of TRPA1 channel in HOD-like cells. Results TRPA1 channel was positively expressed in the cell bodies and processes of HODs. The expression TRPA1 channel was significantly up-regulated by high concentration of TNF-α, which could be suppressed by R 7050. Under IEM, TNF-α treatment could increase the expression of TRPA1 in the ER membrane, cytoplasm and mitochondria. Conclusion Our study demonstrated that TRPA1 expression in HOD-like cells was evidently upregulated by TNF-α, presumably via TNFR1. TNF-α induced significant increasement in the intracellular distributions of TRPA1 proteins, with increases in the cytoplasm, ER membrane, and mitochondria, to actively participate in noxious external stimuli perception and transduction of hyperalgesia.
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Affiliation(s)
- Jie Liu
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin, People's Republic of China
| | - Kehua Que
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin, People's Republic of China
| | - Yangqiu Liu
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin, People's Republic of China
| | - Chengcheng Zang
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin, People's Republic of China
| | - Jing Wen
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin, People's Republic of China.,Lotus Dental Clinic, Guangzhou, Guangdong Province, People's Republic of China
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2
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Atretkhany KSN, Gogoleva VS, Drutskaya MS, Nedospasov SA. Distinct modes of TNF signaling through its two receptors in health and disease. J Leukoc Biol 2020; 107:893-905. [PMID: 32083339 DOI: 10.1002/jlb.2mr0120-510r] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 01/03/2020] [Accepted: 01/21/2020] [Indexed: 12/14/2022] Open
Abstract
TNF is a key proinflammatory and immunoregulatory cytokine whose deregulation is associated with the development of autoimmune diseases and other pathologies. Recent studies suggest that distinct functions of TNF may be associated with differential engagement of its two receptors: TNFR1 or TNFR2. In this review, we discuss the relative contributions of these receptors to pathogenesis of several diseases, with the focus on autoimmunity and neuroinflammation. In particular, we discuss the role of TNFRs in the development of regulatory T cells during neuroinflammation and recent findings concerning targeting TNFR2 with agonistic and antagonistic reagents in various murine models of autoimmune and neuroinflammatory disorders and cancer.
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Affiliation(s)
- Kamar-Sulu N Atretkhany
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia.,Lomonosov Moscow State University, Moscow, Russia
| | - Violetta S Gogoleva
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Marina S Drutskaya
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia
| | - Sergei A Nedospasov
- Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia.,Lomonosov Moscow State University, Moscow, Russia.,Sirius University of Science and Technology, Sochi, Russia
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3
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Aiello A, Giannessi F, Percario ZA, Affabris E. An emerging interplay between extracellular vesicles and cytokines. Cytokine Growth Factor Rev 2019; 51:49-60. [PMID: 31874738 DOI: 10.1016/j.cytogfr.2019.12.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 12/17/2019] [Accepted: 12/17/2019] [Indexed: 12/14/2022]
Abstract
Extracellular vesicles (EVs) are small membrane-bound particles that are naturally released from cells. They are recognized as potent vehicles of intercellular communication both in prokaryotes and eukaryotes. Because of their capacity to carry biological macromolecules such as proteins, lipids and nucleic acids, EVs influence different physiological and pathological functions of both parental and recipient cells. Although multiple pathways have been proposed for cytokine secretion beyond the classical ER/Golgi route, EVs have recently recognized as an alternative secretory mechanism. Interestingly, cytokines/chemokines exploit these vesicles to be released into the extracellular milieu, and also appear to modulate their release, trafficking and/or content. In this review, we provide an overview of the cytokines/chemokines that are known to be associated with EVs or their regulation with a focus on TNFα, IL-1β and IFNs.
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4
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Wadsworth PA, Folorunso O, Nguyen N, Singh AK, D'Amico D, Powell RT, Brunell D, Allen J, Stephan C, Laezza F. High-throughput screening against protein:protein interaction interfaces reveals anti-cancer therapeutics as potent modulators of the voltage-gated Na + channel complex. Sci Rep 2019; 9:16890. [PMID: 31729429 PMCID: PMC6858373 DOI: 10.1038/s41598-019-53110-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 10/28/2019] [Indexed: 11/09/2022] Open
Abstract
Multiple voltage-gated Na+ (Nav) channelopathies can be ascribed to subtle changes in the Nav macromolecular complex. Fibroblast growth factor 14 (FGF14) is a functionally relevant component of the Nav1.6 channel complex, a causative link to spinocerebellar ataxia 27 (SCA27) and an emerging risk factor for neuropsychiatric disorders. Yet, how this protein:channel complex is regulated in the cell is still poorly understood. To search for key cellular pathways upstream of the FGF14:Nav1.6 complex, we have developed, miniaturized and optimized an in-cell assay in 384-well plates by stably reconstituting the FGF14:Nav1.6 complex using the split-luciferase complementation assay. We then conducted a high-throughput screening (HTS) of 267 FDA-approved compounds targeting known mediators of cellular signaling. Of the 65 hits initially detected, 24 were excluded based on counter-screening and cellular toxicity. Based on target analysis, potency and dose-response relationships, 5 compounds were subsequently repurchased for validation and confirmed as hits. Among those, the tyrosine kinase inhibitor lestaurtinib was highest ranked, exhibiting submicromolar inhibition of FGF14:Nav1.6 assembly. While providing evidence for a robust in-cell HTS platform that can be adapted to search for any channelopathy-associated regulatory proteins, these results lay the potential groundwork for repurposing cancer drugs for neuropsychopharmacology.
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Affiliation(s)
- Paul A Wadsworth
- MD/PhD Combined Degree Program and Biochemistry and Molecular Biology Graduate Program, The University of Texas Medical Branch, Galveston, Texas, 77555, USA.,Department of Pharmacology & Toxicology, The University of Texas Medical Branch, Galveston, Texas, 77555, USA
| | - Oluwarotimi Folorunso
- Department of Pharmacology & Toxicology, The University of Texas Medical Branch, Galveston, Texas, 77555, USA
| | - Nghi Nguyen
- HTS Screening Core, Center for Translational Cancer Research, Texas A&M Health Science Center: Institute of Biosciences and Technology, Houston, TX, 77030, USA
| | - Aditya K Singh
- Department of Pharmacology & Toxicology, The University of Texas Medical Branch, Galveston, Texas, 77555, USA
| | - Daniela D'Amico
- Neuroscience Graduate Program, The University of Texas Medical Branch, Galveston, Texas, 77555, USA
| | - Reid T Powell
- HTS Screening Core, Center for Translational Cancer Research, Texas A&M Health Science Center: Institute of Biosciences and Technology, Houston, TX, 77030, USA
| | - David Brunell
- HTS Screening Core, Center for Translational Cancer Research, Texas A&M Health Science Center: Institute of Biosciences and Technology, Houston, TX, 77030, USA
| | - John Allen
- Department of Pharmacology & Toxicology, The University of Texas Medical Branch, Galveston, Texas, 77555, USA
| | - Clifford Stephan
- HTS Screening Core, Center for Translational Cancer Research, Texas A&M Health Science Center: Institute of Biosciences and Technology, Houston, TX, 77030, USA
| | - Fernanda Laezza
- Department of Pharmacology & Toxicology, The University of Texas Medical Branch, Galveston, Texas, 77555, USA.
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Liu J, Zhao Z, Wen J, Wang Y, Zhao M, Peng L, Zang C, Que K. TNF-α differently regulates TRPV2 and TRPV4 channels in human dental pulp cells. Int Endod J 2019; 52:1617-1628. [PMID: 31206742 DOI: 10.1111/iej.13174] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2018] [Revised: 06/10/2019] [Accepted: 06/13/2019] [Indexed: 12/30/2022]
Abstract
AIM To investigate the influence of tumour necrosis factor (TNF)-α on transient receptor potential channel vanilloid subfamily type 2 (TRPV2) and TRPV4 channels in human dental pulp cells (HDPCs), and explore the potential downstream signalling pathway mediating this process. METHODOLOGY Immunofluorescence staining and ratiometric calcium imaging were used to confirm the expression and activation of TRPV2 and TRPV4 channels. Different regulations of 1 and 10 ng mL-1 as well as short- and long-term TNF-α treatments to TRPV2 and TRPV4 response were examined by RT-qPCR, Western blot analysis, flow cytometry and ratiometric calcium imaging. Functions of TNF receptor (TNFR)1 and p38 MAPK signalling pathways in this process were also detected by respective inhibitors. Immunoelectron microscopy (IEM) was used to examine long-term effect of TNF-α on TRPV2 expression at the subcellular level. Data were analysed statistically with t-test, and one-way analysis of variance was used with the non-parametric Mann-Whitney and Kruskal-Wallis tests. The level of significance was set at P < 0.05. RESULTS TRPV2 and TRPV4 channels were activated by respective agonists in HDPCs. Neither TRPV2 nor TRPV4 channels were upregulated by 1 ng mL-1 TNF-α (P > 0.05). TRPV2, but not TRPV4, was upregulated by 10 ng mL-1 TNF-α (P < 0.05). Both short- and long-term treatments with 10 ng mL-1 TNF-α significantly enhanced TRPV2 responses, whereas only short-term treatment of TNF-α increased TRPV4 response (P < 0.05). Moreover, the inhibitors of TNFR and p38 both significantly decreased the TNF-α-induced up-regulation of TRPV channels (P < 0.05). At the subcellular level, prolonged TNF-α treatment significantly increased the functional expression of the TRPV2 channel especially in the nucleus, endoplasmic reticulum and mitochondria. CONCLUSIONS Low and high concentrations, as well as short- and long-term TNF-α treatments regulated the activity of TRPV2 and TRPV4 channels in HDPCs differently, and this effect might be mediated by TNFR1 and p38 MAPK signalling pathways. IEM was used to confirm that prolonged TNF-α treatment significantly increased the functional expression of the TRPV2 channel at a subcellular level.
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Affiliation(s)
- J Liu
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin
| | - Z Zhao
- Department of Stomatology, Tianjin Baodi Hospital, Baodi Clinical College of Tianjin Medical University, Tianjin, China
| | - J Wen
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin
| | - Y Wang
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin
| | - M Zhao
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin
| | - L Peng
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin
| | - C Zang
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin
| | - K Que
- Department of Endodontics, College of Stomatology, Tianjin Medical University, Tianjin
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da Silva DAA, da Silva MV, Barros CCO, Alexandre PBD, Timóteo RP, Catarino JS, Sales-Campos H, Machado JR, Rodrigues DBR, Oliveira CJ, Rodrigues V. TNF-α blockade impairs in vitro tuberculous granuloma formation and down modulate Th1, Th17 and Treg cytokines. PLoS One 2018; 13:e0194430. [PMID: 29543912 PMCID: PMC5854376 DOI: 10.1371/journal.pone.0194430] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 03/03/2018] [Indexed: 12/14/2022] Open
Abstract
Tuberculosis (TB) is a granulomatous disease that has affected humanity for thousands of years. The production of cytokines, such as IFN-γ and TNF-α, is fundamental in the formation and maintenance of granulomas and in the control of the disease. Recently, the introduction of TNF-α-blocking monoclonal antibodies, such as Infliximab, has brought improvements in the treatment of patients with chronic inflammatory diseases, but this treatment also increases the risk of reactivation of latent tuberculosis. Our objective was to analyze, in an in vitro model, the influence of Infliximab on the granulomatous reactions and on the production of antigen-specific cytokines (TNF-α, IFN-γ, IL-12p40, IL-10 and IL-17) from beads sensitized with soluble Bacillus Calmette-Guérin (BCG) antigens cultured in the presence of peripheral blood mononuclear cells (PBMC) from TB patients. We evaluated 76 individuals, with tuberculosis active, treated and subjects with positive PPD. Granuloma formation was induced in the presence or absence of Infliximab for up to 10 days. The use of Infliximab in cultures significantly blocked TNF-α production (p <0.05), and led to significant changes in granuloma structure, in vitro, only in the treated TB group. On the other hand, there was a significant reduction in the levels of IFN-γ, IL-12p40, IL-10 and IL-17 after TNF-α blockade in the three experimental groups (p <0.05). Taken together, our results demonstrate that TNF-α blockade by Infliximab directly influenced the structure of granuloma only in the treated TB group, but negatively modulated the production of Th1, Th17 and regulatory T cytokines in the three groups analyzed.
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Affiliation(s)
- Djalma A. Alves da Silva
- Laboratory of Immunology, Department of Biological Sciences, Triângulo Mineiro Federal University, Uberaba, Minas Gerais, Brazil
| | - Marcos V. da Silva
- Laboratory of Immunology, Department of Biological Sciences, Triângulo Mineiro Federal University, Uberaba, Minas Gerais, Brazil
| | - Cleyson C. Oliveira Barros
- Laboratory of Immunology, Department of Biological Sciences, Triângulo Mineiro Federal University, Uberaba, Minas Gerais, Brazil
| | | | - Rodolfo P. Timóteo
- Laboratory of Immunology, Department of Biological Sciences, Triângulo Mineiro Federal University, Uberaba, Minas Gerais, Brazil
| | - Jonatas S. Catarino
- Laboratory of Immunology, Department of Biological Sciences, Triângulo Mineiro Federal University, Uberaba, Minas Gerais, Brazil
| | - Helioswilton Sales-Campos
- Laboratory of Immunology, Department of Biological Sciences, Triângulo Mineiro Federal University, Uberaba, Minas Gerais, Brazil
| | - Juliana R. Machado
- Laboratory of Immunology, Department of Biological Sciences, Triângulo Mineiro Federal University, Uberaba, Minas Gerais, Brazil
- Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiania, Goiás, Brazil
| | - Denise B. R. Rodrigues
- Laboratory of Immunology, Department of Biological Sciences, Triângulo Mineiro Federal University, Uberaba, Minas Gerais, Brazil
- Laboratory of Biopathology and Molecular Biology, University of Uberaba, Uberaba, Minas Gerais, Brazil
| | - Carlo J. Oliveira
- Laboratory of Immunology, Department of Biological Sciences, Triângulo Mineiro Federal University, Uberaba, Minas Gerais, Brazil
| | - Virmondes Rodrigues
- Laboratory of Immunology, Department of Biological Sciences, Triângulo Mineiro Federal University, Uberaba, Minas Gerais, Brazil
- * E-mail:
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Chen H, Xiao J, Li J, Liu J, Wang C, Feng C, Feng H. TRAF2 of black carp upregulates MAVS-mediated antiviral signaling during innate immune response. FISH & SHELLFISH IMMUNOLOGY 2017; 71:1-9. [PMID: 28964861 DOI: 10.1016/j.fsi.2017.09.069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 09/17/2017] [Accepted: 09/26/2017] [Indexed: 06/07/2023]
Abstract
Tumor necrosis factor receptor-associated factor 2 (TRAF2) is a crucial component of the tumor necrosis factor (TNF) mediated signaling of higher vertebrates. To elucidate its function in teleost fish, TRAF2 homologue of black carp (Mylopharyngodon piceus) has been cloned and characterized in this study. The open reading frame (ORF) of black carp TRAF2 (bcTRAF2) consists of 1611 nucleotides and bcTRAF2 contains 536 amino acids. bcTRAF2 protein migrated around 65 KDa in immunoblot analysis of both EPC and HEK293T cells. bcTRAF2 was identified as a cytosolic protein and suggested to be associated with vesicles scattering in the cytoplasm. NF-κB transcription instead of IFN transcription was activated by bcTRAF2 in reporter assay. It was interesting that bcMAVS-mediated IFN production was up-regulated by bcTRAF2 in a dose dependent manner in reporter assay. Accordingly, EPC cells transfected with both bcMAVS and bcTRAF2 showed enhanced antiviral activity comparing EPC cells only expressing bcMAVS. When co-expressed with bcMAVS, bcTRAF2 was redistributed in the cytoplasm and its subcellular location overlapped with the subcellular location of bcMAVS, which suggested the association between these two molecules. Taken together, the data generated in this paper supported the conclusion that bcTRAF2 was recruited into host innate immune response and positively regulated bcMAVS-mediated antiviral signaling.
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Affiliation(s)
- Hui Chen
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Jun Xiao
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Jun Li
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Ji Liu
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Chanyuan Wang
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Chaoliang Feng
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China
| | - Hao Feng
- State Key Laboratory of Developmental Biology of Freshwater Fish, College of Life Science, Hunan Normal University, Changsha, 410081, China.
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8
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Zhao Y, Yang F, Li W, Xu C, Li L, Chen L, Liu Y, Sun P. miR-29a suppresses MCF-7 cell growth by downregulating tumor necrosis factor receptor 1. Tumour Biol 2017; 39:1010428317692264. [PMID: 28222663 DOI: 10.1177/1010428317692264] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Tumor necrosis factor receptor 1 is the main receptor mediating many tumor necrosis factor-alpha-induced cellular events. Some studies have shown that tumor necrosis factor receptor 1 promotes tumorigenesis by activating nuclear factor-kappa B signaling pathway, while other studies have confirmed that tumor necrosis factor receptor 1 plays an inhibitory role in tumors growth by inducing apoptosis in breast cancer. Therefore, the function of tumor necrosis factor receptor 1 in breast cancer requires clarification. In this study, we first found that tumor necrosis factor receptor 1 was significantly increased in human breast cancer tissues and cell lines, and knockdown of tumor necrosis factor receptor 1 by small interfering RNA inhibited cell proliferation by arresting the cell cycle and inducing apoptosis. In addition, miR-29a was predicted as a regulator of tumor necrosis factor receptor 1 by TargetScan and was shown to be inversely correlated with tumor necrosis factor receptor 1 expression in human breast cancer tissues and cell lines. Luciferase reporter assay further confirmed that miR-29a negatively regulated tumor necrosis factor receptor 1 expression by binding to the 3' untranslated region. In our functional study, miR-29a overexpression remarkably suppressed cell proliferation and colony formation, arrested the cell cycle, and induced apoptosis in MCF-7 cell. Furthermore, in combination with tumor necrosis factor receptor 1 transfection, miR-29a significantly reversed the oncogenic role caused by tumor necrosis factor receptor 1 in MCF-7 cell. In addition, we demonstrated that miR-29a suppressed MCF-7 cell growth by inactivating the nuclear factor-kappa B signaling pathway and by decreasing cyclinD1 and Bcl-2/Bax protein levels. Taken together, our results suggest that miR-29a is an important regulator of tumor necrosis factor receptor 1 expression in breast cancer and functions as a tumor suppressor by targeting tumor necrosis factor receptor 1 to influence the growth of MCF-7 cell.
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Affiliation(s)
- Yiling Zhao
- 1 Department of Ultrasound, The Affiliated Hongqi Hospital of Mudanjiang Medical University, Mudanjiang, China
| | - Fenghua Yang
- 2 Department of Prevention and Health Statistics, Mudanjiang Medical University, Mudanjiang, China
| | - Wenyuan Li
- 3 Key Laboratory of Tumor Prevention and Treatment (Heilongjiang Higher Education Institutions), Mudanjiang Medical University, Mudanjiang, China
| | - Chunyan Xu
- 4 Department of Pathology, Tumor Hospital of Mudanjiang, Mudanjiang, China
| | - Li Li
- 3 Key Laboratory of Tumor Prevention and Treatment (Heilongjiang Higher Education Institutions), Mudanjiang Medical University, Mudanjiang, China
| | - Lifei Chen
- 5 Department of Ophthalmology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yancui Liu
- 3 Key Laboratory of Tumor Prevention and Treatment (Heilongjiang Higher Education Institutions), Mudanjiang Medical University, Mudanjiang, China
| | - Ping Sun
- 3 Key Laboratory of Tumor Prevention and Treatment (Heilongjiang Higher Education Institutions), Mudanjiang Medical University, Mudanjiang, China
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Lubarski-Gotliv I, Asher C, Dada LA, Garty H. FXYD5 Protein Has a Pro-inflammatory Role in Epithelial Cells. J Biol Chem 2016; 291:11072-82. [PMID: 27006401 DOI: 10.1074/jbc.m115.699041] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Indexed: 11/06/2022] Open
Abstract
The FXYD proteins are a family of small membrane proteins that share an invariant four amino acid signature motif F-X-Y-D and act as tissue-specific regulatory subunits of the Na,K-ATPase. FXYD5 (also termed dysadherin or RIC) is a structurally and functionally unique member of the FXYD family. As other FXYD proteins, FXYD5 specifically interacts with the Na,K-ATPase and alters its kinetics by increasing Vmax However, unlike other family members FXYD5 appears to have additional functions, which cannot be readily explained by modulation of transport kinetics. Knockdown of FXYD5 in MDA-MB-231 breast cancer cells largely decreases expression and secretion of the chemokine CCL2 (MCP-1). A related effect has also been observed in renal cell carcinoma cells. The current study aims to further characterize the relationship between the expression of FXYD5 and CCL2 secretion. We demonstrate that transfection of M1 epithelial cell line with FXYD5 largely increases lipopolysaccharide (LPS) stimulated CCL2 mRNA and secretion of the translated protein. We have completed a detailed analysis of the molecular events leading to the above response. Our key findings indicate that FXYD5 generates a late response by increasing the surface expression of the TNFα receptor, without affecting its total protein level, or mRNA transcription. LPS administration to mice demonstrates induced secretion of CCL2 and TNFα in FXYD5-expressing lung peripheral tissue, which suggests a possible role for FXYD5 in normal epithelia during inflammation.
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Affiliation(s)
- Irina Lubarski-Gotliv
- From the Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 7610001, Israel and
| | - Carol Asher
- From the Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 7610001, Israel and
| | - Laura A Dada
- Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois 60611
| | - Haim Garty
- From the Department of Biological Chemistry, Weizmann Institute of Science, Rehovot 7610001, Israel and
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10
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Gagnon J, Sauvé M, Zhao W, Stacey HM, Wiber SC, Bolz SS, Brubaker PL. Chronic Exposure to TNFα Impairs Secretion of Glucagon-Like Peptide-1. Endocrinology 2015; 156:3950-60. [PMID: 26270730 DOI: 10.1210/en.2015-1361] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Obesity is associated with systemic inflammation and elevated levels of TNFα, leading to impaired glucose tolerance. In humans, obesity is also associated with reduced nutrient-stimulated secretion of the intestinal incretin hormone, glucagon-like peptide-1 (GLP-1). We hypothesized that TNFα plays a direct role in the impairment of GLP-1 secretion from the enteroendocrine L-cell and that blocking TNFα can restore both GLP-1 secretion and glucose homeostasis. Expression of the TNFα receptor subytpe-1 was detected in the human NCI-H716 and murine GLUTag L-cell models and in mouse ileal sections. Although TNFα acutely increased GLP-1 release from NCI-H716 cells (P < .05-.001), preincubation with TNFα for 24 hours reduced proglucagon mRNA (P < .05) and GLP-1 cellular (P < .05) levels without affecting cell viability. Furthermore, both NCI-H716 and GLUTag cells pretreated with TNFα for 24 hours no longer responded to known GLP-1 secretagogues, an effect that was reversed by coincubation with the Nuclear Factor Kappa B inhibitor, 5-aminosalicylic acid, in the NCI-H716 cells. Mice given a high-fat diet (HFD) for 12 weeks developed impaired glucose tolerance, hyperinsulinemia, and increased TNFα mRNA expression in fat and ileal tissue. Hyperglycemia and hyperinsulinemia were reduced in HFD mice treated with the anti-TNFα biological, etanercept, for 2 weeks. In primary intestinal cultures from these animals, HFD control mice had impaired GLP-1 secretion, and this was not observed in the HFD etanercept-derived cultures (P < .05). In conclusion, chronic exposure to TNFα directly impairs GLP-1 secretion at the level of the intestinal L-cell, an effect that is reversed by anti-TNFα therapy in association with improved glucose tolerance.
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Affiliation(s)
- Jeffrey Gagnon
- Departments of Physiology (J.G., M.S., W.Z., H.M.S., S.C.W., S.-S.B., P.L.B.) and Medicine (P.L.B.), University of Toronto, Toronto, Ontario, M5S 1A8 Canada; and Centre for Microvascular Medicine (S.-S.B.), University of Toronto and Li Ka Shing Knowledge Institute at St Michael's Hospital, Toronto, Ontario, M5B 1T8 Canada
| | - Meghan Sauvé
- Departments of Physiology (J.G., M.S., W.Z., H.M.S., S.C.W., S.-S.B., P.L.B.) and Medicine (P.L.B.), University of Toronto, Toronto, Ontario, M5S 1A8 Canada; and Centre for Microvascular Medicine (S.-S.B.), University of Toronto and Li Ka Shing Knowledge Institute at St Michael's Hospital, Toronto, Ontario, M5B 1T8 Canada
| | - Wen Zhao
- Departments of Physiology (J.G., M.S., W.Z., H.M.S., S.C.W., S.-S.B., P.L.B.) and Medicine (P.L.B.), University of Toronto, Toronto, Ontario, M5S 1A8 Canada; and Centre for Microvascular Medicine (S.-S.B.), University of Toronto and Li Ka Shing Knowledge Institute at St Michael's Hospital, Toronto, Ontario, M5B 1T8 Canada
| | - Holly M Stacey
- Departments of Physiology (J.G., M.S., W.Z., H.M.S., S.C.W., S.-S.B., P.L.B.) and Medicine (P.L.B.), University of Toronto, Toronto, Ontario, M5S 1A8 Canada; and Centre for Microvascular Medicine (S.-S.B.), University of Toronto and Li Ka Shing Knowledge Institute at St Michael's Hospital, Toronto, Ontario, M5B 1T8 Canada
| | - Stuart C Wiber
- Departments of Physiology (J.G., M.S., W.Z., H.M.S., S.C.W., S.-S.B., P.L.B.) and Medicine (P.L.B.), University of Toronto, Toronto, Ontario, M5S 1A8 Canada; and Centre for Microvascular Medicine (S.-S.B.), University of Toronto and Li Ka Shing Knowledge Institute at St Michael's Hospital, Toronto, Ontario, M5B 1T8 Canada
| | - Steffen-S Bolz
- Departments of Physiology (J.G., M.S., W.Z., H.M.S., S.C.W., S.-S.B., P.L.B.) and Medicine (P.L.B.), University of Toronto, Toronto, Ontario, M5S 1A8 Canada; and Centre for Microvascular Medicine (S.-S.B.), University of Toronto and Li Ka Shing Knowledge Institute at St Michael's Hospital, Toronto, Ontario, M5B 1T8 Canada
| | - Patricia L Brubaker
- Departments of Physiology (J.G., M.S., W.Z., H.M.S., S.C.W., S.-S.B., P.L.B.) and Medicine (P.L.B.), University of Toronto, Toronto, Ontario, M5S 1A8 Canada; and Centre for Microvascular Medicine (S.-S.B.), University of Toronto and Li Ka Shing Knowledge Institute at St Michael's Hospital, Toronto, Ontario, M5B 1T8 Canada
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11
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Miura R, Yokoyama Y, Shigeto T, Futagami M, Mizunuma H. Inhibitory effect of carbonyl reductase 1 on ovarian cancer growth via tumor necrosis factor receptor signaling. Int J Oncol 2015; 47:2173-80. [PMID: 26499922 DOI: 10.3892/ijo.2015.3205] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 10/01/2015] [Indexed: 11/06/2022] Open
Abstract
We investigated the mechanisms of the inhibitory effect of carbonyl reductase 1 (CR1) on ovarian cancer growth mediated by the activation of the tumor necrotic factor receptor (TNFR) pathway. OVCAR-3 and TOV21G cells overexpressing CR1 were constructed by transfecting them with CR1 cDNA by lipofection. CR1-overexpressing and control OVCAR-3 and TOV21G cells were injected subcutaneously into nude mice and the tumor growth was compared between the two groups for 3-4 weeks. The expression of TNFR1 and TNFR2 in tumors was examined immunohistochemically at the end of the experiment. Expression levels of caspase-8 and -3 activated by TNFR1, c-Jun activated by TNFR2, and NF-κB activated by both TNFR1 and TNFR2 were determined using immunohistochemistry and western blot analysis. Tumor growth was significantly suppressed in mice injected with CR1-overexpressing cells. Tumor volume in the CR1 induction group decreased temporarily until 2 weeks. Tumor cell membranes in both CR1 induction and control groups were positive for TNFR1 expression; however, total protein levels did not differ between the two groups. TNFR-2 expression was comparatively weak in both groups. The expression of NF-κB and c-Jun was weaker in the CR1 induction group than in control. In contrast, caspase-8 and -3 expression was higher in the CR1 induction group. Furthermore, the number of apoptotic cells was significantly greater in tumors that appeared after injections of both types of CR1-overexpressing cells than in those of control cancer cells. These results suggest that CR1 induces apoptosis by activating the caspase pathway via binding to TNFR1.
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Affiliation(s)
- Rie Miura
- Department of Obstetrics and Gynecology, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Yoshihito Yokoyama
- Department of Obstetrics and Gynecology, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Tatsuhiko Shigeto
- Department of Obstetrics and Gynecology, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Masayuki Futagami
- Department of Obstetrics and Gynecology, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
| | - Hideki Mizunuma
- Department of Obstetrics and Gynecology, Hirosaki University Graduate School of Medicine, Hirosaki, Aomori 036-8562, Japan
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Schukur L, Geering B, Fussenegger M. Human whole-blood culture system for ex vivo characterization of designer-cell function. Biotechnol Bioeng 2015; 113:588-97. [DOI: 10.1002/bit.25828] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 08/21/2015] [Accepted: 08/30/2015] [Indexed: 02/06/2023]
Affiliation(s)
- Lina Schukur
- Department of Biosystems Science and Engineering; ETH Zurich; Mattenstrasse 26 CH-4058 Basel Switzerland
| | - Barbara Geering
- Department of Biosystems Science and Engineering; ETH Zurich; Mattenstrasse 26 CH-4058 Basel Switzerland
| | - Martin Fussenegger
- Department of Biosystems Science and Engineering; ETH Zurich; Mattenstrasse 26 CH-4058 Basel Switzerland
- Faculty of Science; University of Basel; Basel Switzerland
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Turner MD, Nedjai B, Hurst T, Pennington DJ. Cytokines and chemokines: At the crossroads of cell signalling and inflammatory disease. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2014; 1843:2563-2582. [PMID: 24892271 DOI: 10.1016/j.bbamcr.2014.05.014] [Citation(s) in RCA: 1316] [Impact Index Per Article: 131.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 05/22/2014] [Accepted: 05/23/2014] [Indexed: 12/14/2022]
Abstract
Inflammation occurs as a result of exposure of tissues and organs to harmful stimuli such as microbial pathogens, irritants, or toxic cellular components. The primary physical manifestations of inflammation are redness, swelling, heat, pain, and loss of function to the affected area. These processes involve the major cells of the immune system, including monocytes, macrophages, neutrophils, basophils, dendritic cells, mast cells, T-cells, and B-cells. However, examination of a range of inflammatory lesions demonstrates the presence of specific leukocytes in any given lesion. That is, the inflammatory process is regulated in such a way as to ensure that the appropriate leukocytes are recruited. These events are in turn controlled by a host of extracellular molecular regulators, including members of the cytokine and chemokine families that mediate both immune cell recruitment and complex intracellular signalling control mechanisms that characterise inflammation. This review will focus on the role of the main cytokines, chemokines, and their receptors in the pathophysiology of auto-inflammatory disorders, pro-inflammatory disorders, and neurological disorders involving inflammation.
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Affiliation(s)
- Mark D Turner
- Interdisciplinary Biomedical Research Centre, School of Science and Technology, Nottingham Trent University, Clifton, Nottingham NG11 8NS, United Kingdom.
| | - Belinda Nedjai
- Leukocyte Biology Section, National Heart and Lung Institute, Imperial College, South Kensington, London SW7 2AZ, United Kingdom
| | - Tara Hurst
- Interdisciplinary Biomedical Research Centre, School of Science and Technology, Nottingham Trent University, Clifton, Nottingham NG11 8NS, United Kingdom
| | - Daniel J Pennington
- Blizard Institute, Barts and The London School of Medicine, Queen Mary University of London, Whitechapel, London E1 2AT, United Kingdom
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14
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Jiang H, He P, Xie J, Staufenbiel M, Li R, Shen Y. Genetic deletion of TNFRII gene enhances the Alzheimer-like pathology in an APP transgenic mouse model via reduction of phosphorylated IκBα. Hum Mol Genet 2014; 23:4906-18. [PMID: 24824215 DOI: 10.1093/hmg/ddu206] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Tumor necrosis factor receptor II (TNFRII) is one of the TNF receptor superfamily members and our recent pathological studies show that TNFRII is deficient in the brains of Alzheimer's disease (AD). However, the mechanisms of TNFRII in AD pathogenesis remain unclear. In the present study, by using the gene-targeting approach to delete TNFRII in AD transgenic mouse model, we found that, in the brain of APP23 mice with TNFRII deletion (APP23/TNFRII(-/-)), AD-like pathology, i.e. plaque formation and microglial activation, occurs as early as 6 months of age. To test whether the increased levels of Aβ plaques was due to elevated Aβ, we measured Aβ and found that Aβ levels indeed were significantly increased at this age. Because β-secretase, BACE1, is critical enzyme for Aβ production, we have examined BACE1 and found that BACE1 is increased in both protein levels and enzymatic activity as early as 6 months of age; Having shown that BACE1 promoter region contains NF-κB binding sites, we found that cytoplasmic NF-κB was elevated and SUMO1 binding to IκBα was decreased. To further verify these findings, we have overexpressed TNFRII and identified that overexpressing TNFRII can reverse the findings from APP23/TNFRII(-/-) mice. Altogether, our results demonstrate novel roles of TNFRII in the regulation of Aβ production, suggesting a potential therapeutic strategy for AD by up-regulating TNFRII levels and elevating phosphorylated IκBα by SUMOylation.
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Affiliation(s)
- Hong Jiang
- Haldeman Laboratory of Molecular and Cellular Neurobiology, Sun Health Research Institute, Sun City, AZ 85351, USA, Department of Physiology, Medical College of Qingdao University, Qingdao, China
| | - Ping He
- Haldeman Laboratory of Molecular and Cellular Neurobiology, Sun Health Research Institute, Sun City, AZ 85351, USA, Center for Advanced Therapeutic Strategies of Brain Disorders, Roskamp Institute, Sarasota, FL 34243, USA
| | - Junxia Xie
- Department of Physiology, Medical College of Qingdao University, Qingdao, China
| | | | - Rena Li
- Center for Hormone Advanced Science and Education, Roskamp Institute, Sarasota, FL 34243, USA and
| | - Yong Shen
- Haldeman Laboratory of Molecular and Cellular Neurobiology, Sun Health Research Institute, Sun City, AZ 85351, USA, Department of Physiology, Medical College of Qingdao University, Qingdao, China, Center for Advanced Therapeutic Strategies of Brain Disorders, Roskamp Institute, Sarasota, FL 34243, USA
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15
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Puimège L, Libert C, Van Hauwermeiren F. Regulation and dysregulation of tumor necrosis factor receptor-1. Cytokine Growth Factor Rev 2014; 25:285-300. [PMID: 24746195 DOI: 10.1016/j.cytogfr.2014.03.004] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Accepted: 03/10/2014] [Indexed: 01/18/2023]
Abstract
TNF is an essential regulator of the immune system. Dysregulation of TNF plays a role in the pathology of many auto-immune diseases. TNF-blocking agents have proven successful in the treatment of such diseases. Development of novel, safer or more effective drugs requires a deeper understanding of the regulation of the pro-inflammatory activities of TNF and its receptors. The ubiquitously expressed TNFR1 is responsible for most TNF effects, while TNFR2 has a limited expression pattern and performs immune-regulatory functions. Despite extensive knowledge of TNFR1 signaling, the regulation of TNFR1 expression, its modifications, localization and processing are less clear and the data are scattered. Here we review the current knowledge of TNFR1 regulation and discuss the impact this has on the host.
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Affiliation(s)
- Leen Puimège
- Inflammation Research Center, VIB, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Claude Libert
- Inflammation Research Center, VIB, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Filip Van Hauwermeiren
- Inflammation Research Center, VIB, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.
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16
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Huang SC, Lee CT, Chung BC. Tumor necrosis factor suppresses NR5A2 activity and intestinal glucocorticoid synthesis to sustain chronic colitis. Sci Signal 2014; 7:ra20. [PMID: 24570488 DOI: 10.1126/scisignal.2004786] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Intestinal crypt epithelial cells synthesize glucocorticoids, steroid hormones that protect against inflammatory bowel disease. To investigate how intestinal glucocorticoids are regulated during chronic inflammation, we induced chronic colitis in mice by exposing them to the chemical dextran sulfate sodium (DSS). We found that intestinal glucocorticoid secretion and expression of the genes Cyp11a1 and Cyp11b1 (which encode enzymes that synthesize glucocorticoids) were initially stimulated, but declined during the chronic phase, whereas tumor necrosis factor (TNF) and inflammatory cytokines secreted by T helper type 1 (TH1) and TH17 cells continuously increased in abundance in the inflamed colon. This suggested that inadequate intestinal glucocorticoid synthesis is a feature of chronic intestinal inflammation. We screened for cytokines that regulated intestinal glucocorticoid synthesis and found that TNF suppressed corticosterone secretion and Cyp11a1 and Cyp11b1 expression in an intestinal crypt epithelial cell line. TNF suppressed steroidogenesis by activating the transcription factors c-Jun and nuclear factor κB (NF-κB), which both interacted with the transcription factor NR5A2 and repressed Cyp11a1 reporter activity. This repression was relieved by expression of a dominant-negative form of c-Jun amino-terminal kinase 1 (JNK1), inhibitor of NF-κB, or by a JNK inhibitor. Furthermore, the dominant-negative TNF inhibitor XPro1595 inhibited c-Jun and NF-κB activation in mice, restored intestinal Cyp11a1 and Cyp11b1 expression, reduced colonic cell death, and rescued chronic colitis caused by DSS. Thus, during chronic colitis, TNF suppresses intestinal steroidogenic gene expression by inhibiting the activity of NR5A2, thus decreasing glucocorticoid synthesis and sustaining chronic inflammation.
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Affiliation(s)
- Sheng-Chieh Huang
- 1Institute of Molecular Biology, Academia Sinica, Taipei 115, Taiwan
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17
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Ruspi G, Schmidt EM, McCann F, Feldmann M, Williams RO, Stoop AA, Dean JLE. TNFR2 increases the sensitivity of ligand-induced activation of the p38 MAPK and NF-κB pathways and signals TRAF2 protein degradation in macrophages. Cell Signal 2013; 26:683-90. [PMID: 24378531 DOI: 10.1016/j.cellsig.2013.12.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Revised: 12/19/2013] [Accepted: 12/22/2013] [Indexed: 12/23/2022]
Abstract
Tumour necrosis factor (p55 or p60) receptor (TNFR) 1 is the major receptor that activates pro-inflammatory signalling and induces gene expression in response to TNF. Consensus is lacking for the function of (p75 or p80) TNFR2 but experiments in mice have suggested neuro-, cardio- and osteo-protective and anti-inflammatory roles. It has been shown in various cell types to be specifically required for the induction of TNFR-associated factor-2 (TRAF2) degradation and activation of the alternative nuclear factor (NF)-kappaB pathway, and to contribute to the activation of mitogen-activated protein kinases (MAPK) and the classical NF-kappaB pathway. We have investigated the signalling functions of TNFR2 in primary human and murine macrophages. We find that in these cells TNF induces TRAF2 degradation, and this is blocked in TNFR2(-/-) macrophages. TRAF2 has been previously reported to be required for TNF-induced activation of p38 MAPK. However, TRAF2 degradation does not inhibit TNF-induced tolerance of p38 MAPK activation. Neither TNF, nor lipopolysaccharide treatment, induced activation of the alternative NF-kappaB pathway in macrophages. Activation by TNF of the p38 MAPK and NF-kappaB pathways was blocked in TNFR1(-/-) macrophages. In contrast, although TNFR2(-/-) macrophages displayed robust p38 MAPK activation and IkappaBα degradation at high concentrations of TNF, at lower doses the concentration dependence of signalling was weakened by an order of magnitude. Our results suggest that, in addition to inducing TRAF2 protein degradation, TNFR2 also plays a crucial auxiliary role to TNFR1 in sensitising macrophages for the ligand-induced activation of the p38 MAPK and classical NF-kappaB pro-inflammatory signalling pathways.
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Affiliation(s)
- Gerhard Ruspi
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Old Road Campus, Roosevelt Drive, Headington, Oxford OX3 7FY, United Kingdom
| | - Emily M Schmidt
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Old Road Campus, Roosevelt Drive, Headington, Oxford OX3 7FY, United Kingdom
| | - Fiona McCann
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Old Road Campus, Roosevelt Drive, Headington, Oxford OX3 7FY, United Kingdom
| | - Marc Feldmann
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Old Road Campus, Roosevelt Drive, Headington, Oxford OX3 7FY, United Kingdom
| | - Richard O Williams
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Old Road Campus, Roosevelt Drive, Headington, Oxford OX3 7FY, United Kingdom
| | - A Allart Stoop
- Innovation Biopharm Discovery Unit, Biopharm R&D, GlaxoSmithKline, Cambridge CB4 0WG, United Kingdom
| | - Jonathan L E Dean
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Old Road Campus, Roosevelt Drive, Headington, Oxford OX3 7FY, United Kingdom.
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18
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Integration of apoptosis signal-regulating kinase 1-mediated stress signaling with the Akt/protein kinase B-IκB kinase cascade. Mol Cell Biol 2013; 33:2252-9. [PMID: 23530055 DOI: 10.1128/mcb.00047-13] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Cellular processes are tightly controlled through well-coordinated signaling networks that respond to conflicting cues, such as reactive oxygen species (ROS), endoplasmic reticulum (ER) stress signals, and survival factors to ensure proper cell function. We report here a direct interaction between inhibitor of κB kinase (IKK) and apoptosis signal-regulating kinase 1 (ASK1), unveiling a critical node at the junction of survival, inflammation, and stress signaling networks. IKK can be activated by growth factor stimulation or tumor necrosis factor alpha engagement. IKK forms a complex with and phosphorylates ASK1 at a sensor site, Ser967, leading to the recruitment of 14-3-3, counteracts stress signal-triggered ASK1 activation, and suppresses ASK1-mediated functions. An inhibitory role of IKK in JNK signaling has been previously reported to depend on NF-κB-mediated gene expression. Our data suggest that IKK has a dual role: a transcription-dependent and a transcription-independent action in controlling the ASK1-JNK axis, coupling IKK to ROS and ER stress response. Direct phosphorylation of ASK1 by IKK also defines a novel IKK phosphorylation motif. Because of the intimate involvement of ASK1 in diverse diseases, the IKK/ASK1 interface offers a promising target for therapeutic development.
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19
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Francés DE, Ingaramo PI, Ronco MT, Carnovale CE. Diabetes, an inflammatory process: Oxidative Stress and TNF-alpha involved in hepatic complication. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/jbise.2013.66079] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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20
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Chakrabarti S, Davidge ST. Estradiol modulates tumor necrosis factor-induced endothelial inflammation: role of tumor necrosis factor receptor 2. J Vasc Res 2012; 50:21-34. [PMID: 23095497 DOI: 10.1159/000342736] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Accepted: 08/13/2012] [Indexed: 11/19/2022] Open
Abstract
The sex hormone estradiol (E(2)) appears to mediate both anti-atherogenic and pro-inflammatory effects in premenopausal women, suggesting a complex immunomodulatory role. Tumor necrosis factor (TNF) is a key pro-inflammatory cytokine involved in the pathogenesis of atherosclerosis and other inflammatory diseases. Alterations at the TNF receptors (TNFRs) and their downstream signaling/transcriptional pathways can affect inflammatory responses. Given this background, we hypothesized that chronic E(2) exposure would alter endothelial inflammatory response involving modulation at the levels of TNFRs and signaling pathways. HUVECs were used as the model system. Pre-treatment with E(2) did not significantly alter TNF-induced upregulation of pro-inflammatory molecules ICAM-1 (3-6 times) and VCAM-1 (5-7 times). However, pharmacological inhibition of transcriptional pathways suggested a partial shift from NF-ĸB (from 97 to 64%) towards the JNK/AP-1 pathway in ICAM-1 upregulation on E(2) treatment. In contrast, VCAM-1 expression remained NF-ĸB dependent in both control (∼96%) and E(2) treated (∼85%) cells. The pro-inflammatory TNF effects were mediated by TNFR1. Interestingly, E(2) pre-treatment increased TNFR2 levels in these cells. Concomitant TNFR2 activation (but not TNFR1 activation alone) led to the shift towards JNK/AP-1-mediated ICAM-1 upregulation in E(2)-treated cells, suggesting the effects of chronic E(2) to be dependent on TNFR2 signaling.
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Affiliation(s)
- Subhadeep Chakrabarti
- Departments of Obstetrics and Gynecology and Physiology, Women and Children's Health Research Institute, Cardiovascular Research Center and Mazankowski Alberta Heart Institute, University of Alberta, Edmonton, Alta., Canada
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21
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Zaidi A, Jelveh S, Mahmood J, Hill RP. Effects of lipopolysaccharide on the response of C57BL/6J mice to whole thorax irradiation. Radiother Oncol 2012; 105:341-9. [PMID: 22985778 DOI: 10.1016/j.radonc.2012.08.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Revised: 06/28/2012] [Accepted: 08/11/2012] [Indexed: 01/15/2023]
Abstract
BACKGROUND AND PURPOSE Inflammatory and fibrogenic processes play a crucial role in the radiation-induced injury in the lung. The aim of the present study was to examine whether additive LPS exposure in the lung (to simulate respiratory infection) would affect pneumonitis or fibrosis associated with lung irradiation. MATERIAL AND METHODS Wildtype C57Bl/6J (WT-C57) and TNFα, TNFR1 and TNFR2 knockout ((-/-)) mice, in C57Bl/6J background, were given whole thorax irradiation (10 Gy) with or without post-irradiation intratracheal administration of LPS (50μg/mice). Functional deficit was examined by measuring breathing rate at various times after treatment. Real-time Reverse Transcription-Polymerase Chain Reaction (RT-PCR) and immunohistochemistry were used to analyze the protein expression and m-RNA of Interleukin-1 alpha (IL-1α), Interleukin-1 beta (IL-1β), Interleukin-6 (IL-6), Tumour Necrosis Factor alpha (TNFα) and Transforming Growth Factor beta (TGFβ) in the lung at various times after treatment. Inflammatory cells were detected by Mac-3 (macrophages) and Toluidine Blue (mast cells) staining. Collagen content was estimated by hydroxyproline (total collagen) and Sircol assay (soluble collagen). Levels of oxidative damage were assessed by 8-hydroxy-2-deoxyguanosine (8-OHdG) staining. RESULTS LPS exposure significantly attenuated the breathing rate increases following irradiation of WT-C57, TNFR1(-/-) and TNFR2(-/-)mice and to a lesser extent in TNFα(-/-) mice. Collagen content was significantly reduced after LPS treatment in WT-C57, TNFR1(-/-) and TNFα(-/-) mice and there was a trend in TNFR2(-/-) mice. Similarly there were lower levels of inflammatory cells and cytokines in the LPS treated mice. CONCLUSIONS This study reveals a mitigating effect of early exposure to LPS on injury caused by irradiation on lungs of C57Bl mice. The results suggest that immediate infection post irradiation may not impact lung response negatively in radiation-accident victims, however, further studies are required in different animal models, and with specific infectious agents, to confirm and extend our findings.
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Affiliation(s)
- Asif Zaidi
- Ontario Cancer Institute, Toronto, Ontario, Canada
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22
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Juurlink BHJ. Dietary Nrf2 activators inhibit atherogenic processes. Atherosclerosis 2012; 225:29-33. [PMID: 22986182 DOI: 10.1016/j.atherosclerosis.2012.08.032] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Revised: 08/23/2012] [Accepted: 08/25/2012] [Indexed: 12/21/2022]
Abstract
Dietary Nrf2 activators increase expression of phase 2 protein genes in cells undergoing oxidative stress resulting in a lowering of oxidative stress. Oxidative stress promotes atherogenic processes through oxidizing low density lipoproteins and promotion of inflammation through activation of nuclear factor kappa B and activation of mitogen-activated protein kinases. Nrf2 activators by decreasing oxidative stress decrease the probability of developing atherosclerotic lesions.
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Affiliation(s)
- Bernhard H J Juurlink
- College of Medicine, University of Saskatchewan, SK, Canada; College of Medicine, Alfaisal University, Riyadh, Saudi Arabia.
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23
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Yuan Q, Yang H, Cheng C, Li C, Wu X, Huan W, Sun H, Zhou Z, Wang Y, Zhao Y, Lu X, Shen A. β-1,4-Galactosyltransferase I involved in Schwann cells proliferation and apoptosis induced by tumor necrosis factor-alpha via the activation of MAP kinases signal pathways. Mol Cell Biochem 2012; 365:149-58. [PMID: 22359038 DOI: 10.1007/s11010-012-1254-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Accepted: 02/07/2012] [Indexed: 12/31/2022]
Abstract
β-1,4-galactosyltransferase-I (β-1,4-GalT-I) plays a critical role in the initiation and maintenance of peripheral nervous system inflammatory reaction. However, the exact function of β-1,4-GalT-I in the regulation of SCs proliferation and apoptosis remains unclear. In this study, we found that low concentration of tumor necrosis factor-alpha (TNF-α) induced SCs proliferation, while high concentration of TNF-α induced SCs apoptosis. Meanwhile, the expressions of β-1,4-GalT-I, TNFR1, and TNFR2 were changed following. When β-1,4-GalT I overexpression, low concentration of TNF-α-induced SCs proliferation was partially repressed. Concurrently, the activity of ERK1/2 was decreased. While knocking down β-1,4-GalT I expression, high concentration of TNF-α-induced SCs apoptosis was partially rescued. Consistent with this, the activity of P38 and JNK were decreased. We also found anti-TNFR2 antibody suppressed low concentration of TNF-α-induced SCs proliferation, while anti-TNFR1 antibody inhibited high concentration of TNF-α-induced SCs apoptosis. Thus, present data show that β-1,4-GalT I may play an important role in SCs proliferation and apoptosis induced by TNF-α via different signal pathways and TNFR.
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Affiliation(s)
- Qin Yuan
- Department of Immunology, Medical College, Nantong University, Nantong, Jiangsu 226001, People's Republic of China
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24
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Kitagaki M, Isoda K, Kamada H, Kobayashi T, Tsunoda S, Tsutsumi Y, Niida T, Kujiraoka T, Ishigami N, Ishihara M, Matsubara O, Ohsuzu F, Kikuchi M. Novel TNF-α receptor 1 antagonist treatment attenuates arterial inflammation and intimal hyperplasia in mice. J Atheroscler Thromb 2011; 19:36-46. [PMID: 22146239 DOI: 10.5551/jat.9746] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
AIM Tumor necrosis factor receptor 1 (TNFR1) participates importantly in arterial inflammation in genetically altered mice; however it remains undetermined whether a selective TNFR1 antagonist inhibits arterial inflammation and intimal hyperplasia. This study aimed to determine the effect and mechanism of a novel TNFR1 antagonist in the suppression of arterial inflammation. METHODS We investigated intimal hyperplasia in IL-1 receptor antagonist-deficient mice two weeks after inducing femoral artery injury in an external vascular cuff model. All mice received intraperitoneal injections of TNFR1 antagonist (PEG-R1antTNF) or normal saline twice daily for 14 days. RESULTS PEG-R1antTNF treatment yielded no adverse systemic effects, and we observed no significant differences in serum cholesterol or blood pressure in either group; however, selective PEG-R1antTNF treatment significantly reduced intimal hyperplasia (19,671±4,274 vs. 11,440±3,292 µm(2); p=0.001) and the intima/media ratio (1.86±0.43 vs. 1.34±0.36; p=0.029), compared with saline injection. Immunostaining revealed that PEG-R1antTNF inhibits Nuclear factor-κB (NF-κB), suppressing smooth muscle cell (SMC) proliferation and decreasing chemokine and adhesion molecule expression, and thus decreasing intimal hyperplasia and inflammation. CONCLUSIONS Our data suggest that PEG-R1antTNF suppresses SMC proliferation and inflammation by inhibiting NF-κB. This study highlights the potential therapeutic benefit of selective TNFR1 antagonist therapy in preventing intimal hyperplasia and arterial inflammation.
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Affiliation(s)
- Manabu Kitagaki
- Medical Engineering, National Defense Medical College, Saitama, Japan
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Yang H, Yuan Q, Chen Q, Li C, Wu X, Peng C, Kang L, Lu X, Sun H, Zhou Z, Shen A, Cheng C. β-1,4-galactosyltransferase I promotes tumor necrosis factor-α autocrine via the activation of MAP kinase signal pathways in Schwann cells. J Mol Neurosci 2011; 45:269-76. [PMID: 21461672 DOI: 10.1007/s12031-011-9517-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Accepted: 03/16/2011] [Indexed: 12/28/2022]
Abstract
Recent studies have demonstrated that aberrant galactosylation is associated with some inflammation diseases. β-1,4-Galactosyltransferase-I (β-1,4-GalT I), which transferred galactose to the terminal N-acetylglucosamine of N- and O-linked glycans in a β-1,4-linkage, was considered to be the major galactosyltransferase among the seven members of the subfamily responsible for β4 galactosylation. To elucidate the expression and possible function of β-1,4-GalT I in the peripheral nervous system (PNS) inflammatory diseases, we performed a tumor necrosis factor-alpha (TNF-α) autocrine inflammatory model in Schwann cells (SCs). In this study, we found that silencing of β-1,4-GalT I suppressed TNF-α autocrine, while overexpression of β-1,4-GalT I promoted TNF-α autocrine in TNF-α-treated SCs. Meanwhile, anti-TNFR1 antibody suppressed the expression of β-1,4-GalT I, and TNF-α autocrine. β-1,4-GalT I conferred its effect by promoting ERK, JNK, and P38 MAP kinase signal pathways activation in TNF-α-induced SCs. Thus, the present data shows that during SCs activation, β-1,4-GalT I may play an important role in the release of inflammatory mediators.
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Affiliation(s)
- Huiguang Yang
- Department of Osteology, Affiliated Jiangyin Hospital of Nantong University, Medical Colledge, Nantong University, Nantong 226001 Jiangsu, People's Republic of China
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Bhattacharyya S, Dudeja PK, Tobacman JK. Tumor necrosis factor alpha-induced inflammation is increased but apoptosis is inhibited by common food additive carrageenan. J Biol Chem 2010; 285:39511-22. [PMID: 20937806 PMCID: PMC2998126 DOI: 10.1074/jbc.m110.159681] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2010] [Revised: 10/06/2010] [Indexed: 12/15/2022] Open
Abstract
Tumor necrosis factor (TNF)-α, a homotrimeric, pleiotropic cytokine, is secreted in response to inflammatory stimuli in diseases such as rheumatoid arthritis and inflammatory bowel disease. TNF-α mediates both apoptosis and inflammation, stimulating an inflammatory cascade through the non-canonical pathway of NF-κB activation, leading to increased nuclear RelB and p52. In contrast, the common food additive carrageenan (CGN) stimulates inflammation through both the canonical and non-canonical pathways of NF-κB activation and utilizes the adaptor molecule BCL10 (B-cell leukemia/lymphoma 10). In a series of experiments, colonic epithelial cells and mouse embryonic fibroblasts were treated with TNF-α and carrageenan in order to simulate the possible effects of exposure to dietary CGN in the setting of a TNF-α-mediated inflammatory disease process. A marked increase in secretion of IL-8 occurred, attributable to synergistic effects on phosphorylated NF-κB-inducing kinase (NIK) in the non-canonical pathway. TNF-α induced the ubiquitination of TRAF2 (TNF receptor-associated factor 2), which interacts with NIK, and CGN induced phosphorylation of BCL10, leading to increased NIK phosphorylation. These results suggest that TNF-α and CGN in combination act to increase NIK phosphorylation, thereby increasing activation of the non-canonical pathway of NF-κB activation. In contrast, the apoptotic effects of TNF-α, including activation of caspase-8 and PARP-1 (poly(ADP-ribose) polymerase 1) fragmentation, were markedly reduced in the presence of CGN, and CGN caused reduced expression of Fas. These findings demonstrate that exposure to CGN drives TNF-α-stimulated cells toward inflammation rather than toward apoptotic cell death and suggest that CGN exposure may compromise the effectiveness of anti-TNF-α therapy.
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Affiliation(s)
- Sumit Bhattacharyya
- From the Department of Medicine, University of Illinois, Chicago, Illinois 60612 and
| | - Pradeep K. Dudeja
- From the Department of Medicine, University of Illinois, Chicago, Illinois 60612 and
- the Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois 60612
| | - Joanne K. Tobacman
- From the Department of Medicine, University of Illinois, Chicago, Illinois 60612 and
- the Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois 60612
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Kalayjian RC, Machekano RN, Rizk N, Robbins GK, Gandhi RT, Rodriguez BA, Pollard RB, Lederman MM, Landay A. Pretreatment levels of soluble cellular receptors and interleukin-6 are associated with HIV disease progression in subjects treated with highly active antiretroviral therapy. J Infect Dis 2010; 201:1796-805. [PMID: 20446847 DOI: 10.1086/652750] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND To identify inflammatory pathways that may contribute to the pathogenesis of human immunodeficiency virus (HIV) disease, we explored associations between AIDS or death and different inflammatory markers, including selected soluble tumor necrosis factor superfamily receptors (sTNFRs) and ligands, interleukin (IL)-6, and CD8 T cell activation, in individuals treated with highly active antiretroviral therapy (HAART). METHODS A case-control study of subjects in AIDS Clinical Trials Group (ACTG) protocols 384 and 5015, who were matched according to the CD4 cell count and plasma viral load at baseline, was performed using conditional logistic regression. RESULTS Higher pretreatment concentrations of sTNFR-1, sCD27, sCD40L, and plasma IL-6 were associated with a new AIDS-defining illness or death in separate models adjusted for age, sex, hemoglobin, and the latest CD4 cell counts. In additional models that excluded case patients with opportunistic infections, sTNFR-1, sCD27, and sCD40L were each associated with a new AIDS-defining malignancy or death that developed at a median of 51 weeks after initiation of HAART, by which time the majority of subjects had a CD4 cell count of >200 cells/cm(3) and had achieved a plasma viral load of <50 copies/mL. CONCLUSION These data are compatible with a model in which these soluble inflammatory markers identify pathways that may contribute to the pathogenesis of HIV disease progression, pathways that might not be a direct consequence of ongoing HIV type 1 replication.
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Affiliation(s)
- Robert C Kalayjian
- MetroHealth Medical Center, Case Western Reserve University School of Medicine, Cleveland, Ohio 44109-1998, USA.
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28
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Houssen WE, Lu Z, Edrada-Ebel R, Chatzi C, Tucker SJ, Sepčić K, Turk T, Zovko A, Shen S, Mancini I, Scott RH, Jaspars M. Chemical synthesis and biological activities of 3-alkyl pyridinium polymeric analogues of marine toxins. J Chem Biol 2010; 3:113-25. [PMID: 21326630 DOI: 10.1007/s12154-010-0036-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2009] [Accepted: 01/12/2010] [Indexed: 10/19/2022] Open
Abstract
UNLABELLED Two new large poly-1,3-dodecylpyridinium salts, APS12 and APS12-2 of 12.5- and 14.7-kDa size, respectively, were synthesised and tested for their pore-forming and transfection capabilities in HEK 293 and undifferentiated mouse ES cells using patch-clamp recording, Ca(2+) imaging and flow cytometry. Polymerisation reactions were enhanced by microwaves, and the product sizes were controlled by altering the irradiation time. This method can also be applied to obtain polymers with variable linking chains as shown by the preparation of poly-(1,3-octylpyridinium) salt of 11.9-kDa size. Molecular weights of the final products were determined using ESIMS analysis, which also indicated the products to be amongst the largest macro-cycles ever recorded, up to a 900-membered ring. Anti-bacterial, haemolytic and anti-acetylcholinesterase activities were also reported for the two dodecyl pyridinium polymers. These biological activities are characteristic to the structurally related marine toxin, poly-APS. ELECTRONIC SUPPLEMENTARY MATERIAL The online version of this article (doi:10.1007/s12154-010-0036-4) contains supplementary material, which is available to authorized users.
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29
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Zhou Z, Tao T, Ji Y, Yang H, Wang Y, Cheng C, Shen A, Lu X. SSeCKS promotes tumor necrosis factor-alpha autocrine via activating p38 and JNK pathways in Schwann cells. Cell Mol Neurobiol 2010; 30:701-7. [PMID: 20111901 DOI: 10.1007/s10571-009-9494-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2009] [Accepted: 12/28/2009] [Indexed: 12/23/2022]
Abstract
Tumor necrosis factor-alpha (TNF-alpha) derived from activated Schwann cells (SCs) plays a critical role as an inflammatory mediator in the peripheral nervous system disease. TNF-alpha could act as an autocrine mediator in SC activation. In this study, we found knockdown Src-suppressed protein kinase C substrate (SSeCKS) expression suppressed TNF-alpha production induced by TNF-alpha, overexpression of SSeCKS could promoted TNF-alpha autocrine in SCs. Such effects might be resulted in SSeCKS promoted p38 and JNK activation in SCs treated by TNF-alpha. Thus present data show that while SCs activation, SSeCKS may plays an important role in the release of inflammatory mediators.
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Affiliation(s)
- Zhengming Zhou
- Department of Osteology, Affiliated Jiangyin Hospital of Nantong University, and The Jiangsu Province Key Laboratory of Neuroregeneration, Nantong University, Nantong 226001, Jiangsu, People's Republic of China
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30
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Masli S, Turpie B. Anti-inflammatory effects of tumour necrosis factor (TNF)-alpha are mediated via TNF-R2 (p75) in tolerogenic transforming growth factor-beta-treated antigen-presenting cells. Immunology 2009; 127:62-72. [PMID: 18795974 DOI: 10.1111/j.1365-2567.2008.02933.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Exposure of macrophages to transforming growth factor (TGF)-beta is known to alter their functional phenotype such that antigen presentation by these cells leads to tolerance rather than an inflammatory immune response. Typically, eye-derived antigen-presenting cells (APCs) exposed to TGF-beta in the local environment are known to induce a form of peripheral tolerance and protect the eye from inflammatory immune effector-mediated damage. In response to TGF-beta, APCs increase their expression of tumour necrosis factor (TNF)-alpha and TNF receptor 2 (TNF-R2). Although TNF-alpha has been implicated in tolerance and the associated regulation of the inflammatory immune response, its source and the receptors involved remain unclear. In this report we determined the contribution of TNF-alpha and TNF-R2 expressed by TGF-beta-treated APCs to their anti-inflammatory tolerogenic effect. Our results indicate that APC-derived TNF-alpha is essential for the ability of APCs to regulate the immune response and their IL-12 secretion. Moreover, in the absence of TNF-R2, APCs exposed to TGF-beta failed to induce tolerance or regulatory cells known to participate in this tolerance. Also, blocking of TNF-R1 signalling enhanced the ability of the APCs to secrete increased TGF-beta in response to TGF-beta exposure. Together our results support an anti-inflammatory role of TNF-alpha in regulation of an immune response by TGF-beta-treated APCs and suggest that TNF-R2 contributes significantly to this role.
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Affiliation(s)
- Sharmila Masli
- Department of Ophthalmology, Harvard Medical School, Boston, MA, USA.
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31
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Tumor necrosis factor receptor 1 induces interleukin-6 upregulation through NF-kappaB in a rat neuropathic pain model. Eur J Pain 2008; 13:794-806. [PMID: 18938092 DOI: 10.1016/j.ejpain.2008.09.009] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2008] [Revised: 08/14/2008] [Accepted: 09/08/2008] [Indexed: 12/16/2022]
Abstract
Peripheral nerve injury resulting in neuropathic pain induces the upregulation of interleukin (IL)-6 and tumor necrosis factor-alpha, which binds to tumor necrosis factor receptor 1 (TNFR1) and induces NF-kappaB and p38 MAPK activation in the spinal cord and dorsal root ganglia (DRG). We here investigated whether TNFR1 regulates IL-6 expression through NF-kappaB or p38 MAPK activations in the spinal cord and DRG in rats with chronic constriction injury (CCI) of the sciatic nerve. Intrathecal treatment with a TNFR1 antisense oligonucleotide (ASO) significantly inhibited CCI-elevated IKKs phosphorylation, IkB-alpha degradation, the nuclear translocation, phosphorylation, and DNA-binding activity of NF-kappaB, p38 MAPK activation, and IL-6 mRNA and protein expression in the spinal cord and DRG. Interestingly, CCI remarkably elevated IKKalpha and p65 phosphorylations in the spinal cord rather than in the DRG. In addition, NF-kappaB decoy, but not p38 MAPK inhibitor, SB203580 reduced CCI-elevated IL-6 expression in the spinal cord and DRG. Therefore, these data suggest that TNFR1 induces IL-6 upregulation and neuropathic pain through NF-kappaB, but not p38 MAPK activation in the spinal cord and DRG and that the NF-kappaB/IL-6 pathways in the DRG may be less dependent on TNFR1 than the spinal cord pathway.
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32
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Pliyev BK. Activated human neutrophils rapidly release the chemotactically active D2D3 form of the urokinase-type plasminogen activator receptor (uPAR/CD87). Mol Cell Biochem 2008; 321:111-22. [PMID: 18830568 DOI: 10.1007/s11010-008-9925-z] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2008] [Accepted: 09/15/2008] [Indexed: 10/21/2022]
Abstract
The urokinase-type plasminogen activator receptor (uPAR/CD87) exists both in cell-bound and soluble forms. Neutrophils contain extensive intracellular pools of uPAR that are translocated to the plasma membrane upon activation. In the present study, we investigated the ability of human neutrophils to shed uPAR from cell surface following activation and addressed the possible involvement of the released receptor in the inflammatory response. We first observed that the spontaneous release of suPAR by resting neutrophils was strongly and rapidly (within minutes) enhanced by calcium ionophore ionomycin and to a lesser extent when cells were primed with TNF-alpha and then stimulated with fMLP or IL-8. We demonstrated that suPAR is produced by resting and activated neutrophils predominantly as a truncated form devoid of N-terminal D1 domain (D2D3 form) that lacks GPI anchor. Migration of formyl peptide receptor-like 1 (FPRL1)-transfected human embryonic kidney (HEK) 293 cells toward the supernatants harvested from activated neutrophils was significantly diminished when D2D3 form of suPAR was immunodepleted from the supernatants. We conclude that activated neutrophils release the chemotactically active D2D3 form of suPAR that acts as a ligand of FPRL1. Interestingly, we present evidence that GPI-specific phospholipase D (GPI-PLD) that has previously been shown to shed uPAR in cancer cells is not involved in suPAR release from human neutrophils. We suggest that production of the chemotactically active D2D3 form of suPAR by activated human neutrophils in vivo could contribute to the recruitment of monocytes and other formyl peptide receptors-expressing cells to the sites of acute inflammation where neutrophil accumulation and activation occur.
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Affiliation(s)
- Boris K Pliyev
- Department of Biological and Medical Chemistry, Faculty of Fundamental Medicine, Moscow State University, Moscow, Russia.
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33
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Nystatin interferes with the effects of N-methyl-N'-nitro-N-nitrosoguanidine on sphingolipid metabolism in human FL cells. Lipids 2008; 43:867-75. [PMID: 18629562 DOI: 10.1007/s11745-008-3209-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2008] [Accepted: 06/16/2008] [Indexed: 12/26/2022]
Abstract
Previously we have shown that an alkylating agent N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) can induce receptor clustering and the activation of a downstream signal molecule NF-kappaB, and that the receptor clustering is associated with changes in sphingolipids metabolism. On the other hand, the polyene antibiotic nystatin can block MNNG-induced receptor clustering. In this study, using a lipidomic approach, we further evaluated whether nystatin influenced the effects of MNNG on sphingolipids metabolism. It was found that nystatin itself induced changes in the sphingolipids profile in human amnion FL cells to a certain extent, including an increase or decrease of some sphingolipid species. Interestingly, nystatin can block, at least partially, the changes of sphingolipids-induced by MNNG. In addition, nystatin can also partially inhibit the activation of NF-kappaB induced by MNNG. Neither MNNG nor nystatin affects the mRNA levels of serine palmitoyltransferase, acid sphingomyelinase (ASM), and sphingomyelin synthase, key enzymes in the sphingolipids biosynthesis pathway. However, MNNG can activate ASM and neutral sphingomyelinase, while nystatin preincubation inhibits the activation. Taken together, these data suggested that nystatin interferes with the effects of MNNG, and might elicit its function through altered sphingolipids metabolism.
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34
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TNF-alpha as an autocrine mediator and its role in the activation of Schwann cells. Neurochem Res 2008; 33:1077-84. [PMID: 18205044 DOI: 10.1007/s11064-007-9552-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2007] [Accepted: 11/15/2007] [Indexed: 12/20/2022]
Abstract
In the peripheral nervous system (PNS), tumor necrosis factor-alpha (TNF-alpha) derived from activated Schwann cells (SCs) play a critical role as a pleiotropic mediator. In this study, we examined the function of TNF-alpha as an inflammatory mediator in SCs activation. TNF-alpha exhibits its biological effect through two distinct surface receptors, TNF receptor 1 (TNFR1) and TNFR2. We show here that cultured SCs express both TNFR1 and TNFR2, and that activation of these receptors by TNF-alpha promotes expression of TNF-alpha. Meanwhile, TNF-alpha also increased the production of other inflammatory mediators. Furthermore, TNF-alpha is involved in the induction of apoptosis through binding to TNFR in SCs. The activation of SCs by lipopolysaccharide (LPS) is partially mediated by SCs-derived TNF-alpha. These findings suggest the existence of a positive feedback loop in the activation of SC via TNF-alpha. This loop may be involved in the prolonged activation of SCs. Acute or chronic stimulation of TNF-alpha by SC at sites of PNS inflammation may be critical in determining whether TNF-alpha has activational, inflammatory, or cytotoxic effects on these cells.
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35
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Wang Y, Sun X, Wu J, Xu BE, Gu C, Wang H, Wang X, Tan F, Peng X, Qiang B, Yuan J, Luo Y. Casein kinase 1alpha interacts with RIP1 and regulates NF-kappaB activation. Biochemistry 2007; 47:441-8. [PMID: 18067272 DOI: 10.1021/bi7010515] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Tumor necrosis factor alpha (TNFalpha) triggers a signaling pathway converging on the activation of NF-kappaB, which forms the basis for many physiological and pathological processes. In a kinase gene screen using a NF-kappaB reporter, we observed that overexpression of casein kinase 1alpha (CK1alpha) enhanced TNFalpha-induced NF-kappaB activation, and a CK1alpha kinase dead mutant, CK1alpha (K46A), reduced NF-kappaB activation induced by TNFalpha. We subsequently demonstrated that CK1alpha interacted with receptor interacting protein 1 (RIP1) but not with TRADD, TRAF2, MEKK3, IKKalpha, IKKbeta, or IKKgamma in mammalian cells. RIP1 is an indispensable molecule in TNFalpha/NF-kappaB signaling. We demonstrated that CK1alpha interacted with and phosphorylated RIP1 at the intermediate domain. Finally, we showed that CK1alpha enhanced RIP1-mediated NF-kappaB activation. Taken together, our studies suggest that CK1alpha is another kinase that regulates RIP1 function in NF-kappaB activation.
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Affiliation(s)
- Yong Wang
- National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100005, China
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36
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Yan M, Xia C, Cheng C, Shao X, Niu S, Liu H, Shen A. The role of TNF-α and its receptors in the production of Src-suppressed C kinase substrate by rat primary type-2 astrocytes. Brain Res 2007; 1184:28-37. [DOI: 10.1016/j.brainres.2007.09.082] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2007] [Revised: 09/20/2007] [Accepted: 09/27/2007] [Indexed: 01/03/2023]
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37
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Rivas MA, Carnevale RP, Proietti CJ, Rosemblit C, Beguelin W, Salatino M, Charreau EH, Frahm I, Sapia S, Brouckaert P, Elizalde PV, Schillaci R. TNF alpha acting on TNFR1 promotes breast cancer growth via p42/P44 MAPK, JNK, Akt and NF-kappa B-dependent pathways. Exp Cell Res 2007; 314:509-29. [PMID: 18061162 DOI: 10.1016/j.yexcr.2007.10.005] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2007] [Revised: 10/08/2007] [Accepted: 10/10/2007] [Indexed: 11/28/2022]
Abstract
Tumor necrosis factor alpha (TNF alpha) enhances proliferation of chemically-induced mammary tumors and of T47D human cell line through not fully understood pathways. Here, we explored the intracellular signaling pathways triggered by TNF alpha, the participation of TNF alpha receptor (TNFR) 1 and TNFR2 and the molecular mechanism leading to breast cancer growth. We demonstrate that TNFalpha induced proliferation of C4HD murine mammary tumor cells and of T47D cells through the activation of p42/p44 MAPK, JNK, PI3-K/Akt pathways and nuclear factor-kappa B (NF-kappa B) transcriptional activation. A TNF alpha-specific mutein selectively binding to TNFR1 induced p42/p44 MAPK, JNK, Akt activation, NF-kappa B transcriptional activation and cell proliferation, just like wild-type TNF alpha, while a mutein selective for TNFR2 induced only p42/p44 MAPK activation. Interestingly, blockage of TNFR1 or TNFR2 with specific antibodies was enough to impair TNF alpha signaling and biological effect. Moreover, in vivo TNF alpha administration supported C4HD tumor growth. We also demonstrated, for the first time, that injection of a selective inhibitor of NF-kappa B activity, Bay 11-7082, resulted in regression of TNF alpha-promoted tumor. Bay 11-7082 blocked TNF alpha capacity to induce cell proliferation and up-regulation of cyclin D1 and of Bcl-xLin vivo and in vitro. Our results reveal evidence for TNF alpha as a breast tumor promoter, and provide novel data for a future therapeutic approach using TNF alpha antagonists and NF-kappa B pharmacological inhibitors in established breast cancer treatment.
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Affiliation(s)
- Martín A Rivas
- Laboratory of Molecular Mechanisms of Carcinogenesis, Instituto de Biología y Medicina Experimental, CONICET, Vuelta de Obligado 2490, Buenos Aires, C1428ADN, Argentina
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38
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Yan M, Xia C, Niu S, Cheng C, Shao X, Shen A. The role of TNF-alpha and its receptors in the production of beta-1,4-galactosyltransferase I mRNA by rat primary type-2 astrocytes. Cell Mol Neurobiol 2007; 28:223-36. [PMID: 17712626 DOI: 10.1007/s10571-007-9182-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2007] [Accepted: 07/28/2007] [Indexed: 01/02/2023]
Abstract
beta-1,4-galactosyltransferase I (beta-1,4-GalT I) plays an important role in the synthesis of the backbone structure of adhesion molecules involved in leukocyte-endothelial cell interaction. The expression of beta-1,4-GalT I mRNA increased in primary human endothelial cells after exposure to tumor necrosis factor-alpha (TNF-alpha). In the central nervous system (CNS), astrocytes play a pivotal role in immunity as immunocompetent cells by secreting cytokines and inflammatory mediators, there are two types of astrocytes. Type-1 astrocytes can secrete TNF-alpha when stimulated with Lipopolysaccharide (LPS), while the responses of type-2 astrocytes during inflammation are unknown. So we examined the expression change of beta-1,4-GalT I mRNA in type-2 astrocytes after exposure to TNF-alpha and LPS. Real-time PCR showed that TNF-alpha or LPS affected beta-1,4-GalT I mRNA expression in a time- and dose-dependent manner. RT-PCR analysis revealed that TNFR1 and TNFR2 were present in normal untreated type-2 astrocytes, and that TNF-alpha, TNFR1 and TNFR2 increased in type-2 astrocytes after exposure to TNF-alpha or LPS. Immunocytochemistry showed that TNFR1 was expressed in the cytoplasm, nucleus and processes of normal untreated type-2 astrocytes, and distributed mainly in the cytoplasm and processes after exposure to LPS. TNFR2 was mainly expressed in the nucleus of normal untreated type-2 astrocytes, and distributed mainly in the processes of type-2 astrocytes after exposure to LPS. Both anti-TNFR1 and anti-TNFR2 antibodies suppressed beta-1,4-GalT I mRNA expression induced by TNF-alpha or LPS. From these results, we conclude that TNF-alpha signaling via both TNFR1 and TNFR2 translocated from nucleus to cytoplasm or processes is sufficient to induce beta-1,4-GalT I mRNA. In addition, we observed that not only exogenous TNF-alpha but also TNF-alpha produced by type-2 astrocytes affected beta-1,4-GalT I mRNA production in type-2 astrocytes. These results suggest that an autocrine loop involving TNF-alpha contributes to the production of beta-1,4-GalT I mRNA in response to inflammation.
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MESH Headings
- Animals
- Animals, Newborn
- Antibodies/pharmacology
- Astrocytes/cytology
- Astrocytes/enzymology
- Astrocytes/immunology
- Cells, Cultured
- Dose-Response Relationship, Drug
- Encephalitis/immunology
- Encephalitis/metabolism
- Encephalitis/physiopathology
- Galactosyltransferases/genetics
- Gene Expression Regulation, Enzymologic/drug effects
- Gene Expression Regulation, Enzymologic/immunology
- Lipopolysaccharides/pharmacology
- RNA, Messenger/metabolism
- Rats
- Rats, Sprague-Dawley
- Receptors, Tumor Necrosis Factor, Type I/immunology
- Receptors, Tumor Necrosis Factor, Type I/metabolism
- Receptors, Tumor Necrosis Factor, Type II/immunology
- Receptors, Tumor Necrosis Factor, Type II/metabolism
- Tumor Necrosis Factor-alpha/metabolism
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Affiliation(s)
- Meijuan Yan
- Jiangsu Key Laboratory of Neuroregeneration, Nantong University, 19 Qi-Xiu Road, Nantong, Jiangsu Province, 226001, P.R. China
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Menon R, Thorsen P, Vogel I, Jacobsson B, Williams SM, Fortunato SJ. Increased Bioavailability of TNF-α in African Americans During In Vitro Infection: Predisposing Evidence for Immune Imbalance. Placenta 2007; 28:946-50. [PMID: 17517432 DOI: 10.1016/j.placenta.2007.03.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2007] [Revised: 03/12/2007] [Accepted: 03/23/2007] [Indexed: 11/17/2022]
Abstract
OBJECTIVE The objective of this study is to examine TNF-alpha and its soluble and membrane bound receptors in fetal membranes derived from blacks and whites in response to in vitro infectious stimulus, and the balance between TNF-alpha and the receptors. Fetal membranes collected from black and white women at term were maintained in an organ explant system and stimulated with lipopolysaccharide (LPS). TNF-alpha, soluble TNF receptors (sTNFR1 and sTNFR2) in culture media and membrane bound TNF receptors (TNFR1 and TNFR2) in tissue homogenates were measured. Molar ratio (TNF/sTNFR) was calculated between LPS stimulated and unstimulated (controls) cultures in both races. TNF-alpha was increased in both races after LPS stimulation and showed no difference between races (p=0.7). LPS decreased sTNFR1 in blacks, but increased in whites, showing a significant difference between races (p=0.001). In blacks sTNFR2 also decreased and increased in whites, but the results were not significant between races (p=0.4). Both TNFR1 and TNFR2 were increased in blacks after LPS stimulation whereas no such changes were seen in whites compared to controls that were also significant between races. After LPS stimulation TNF-alpha bioavailability was increased in blacks with a drop in soluble receptors and with an increase in membrane receptors. This was not evident in whites because in whites soluble receptors were increased with no change in membrane receptors. Our data demonstrated that LPS stimulation results in a molar ratio switch favoring TNF-alpha biofunction in blacks, but not in whites.
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Affiliation(s)
- R Menon
- The Perinatal Research Center, Nashville, TN, USA
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40
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Rae C, Langa S, Tucker SJ, MacEwan DJ. Elevated NF-kappaB responses and FLIP levels in leukemic but not normal lymphocytes: reduction by salicylate allows TNF-induced apoptosis. Proc Natl Acad Sci U S A 2007; 104:12790-5. [PMID: 17646662 PMCID: PMC1937545 DOI: 10.1073/pnas.0701437104] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2007] [Indexed: 01/04/2023] Open
Abstract
As its name suggests, tumor necrosis factor (TNF) is known to induce cytotoxicity in a wide variety of tumor cells and cell lines. However, its use as a chemotherapeutic drug has been limited by its deleterious side effects of systemic shock and widespread inflammatory responses. Some nonsteroidal antiinflammatory drugs, such as sodium salicylate, have been shown to have a chemopreventive role in certain forms of cancer. Here, we reveal that sodium salicylate selectively enhances the apoptotic effects of TNF in human erythroleukemia cells but does not affect primary human lymphocytes or monocytes. Sodium salicylate did not affect the intracellular distribution of TNF receptors (TNFRs) but stimulated cell surface TNFR2 shedding. Erythroleukemia cells were shown to possess markedly greater basal NF-kappaB responses and elevated Fas-associated protein with death domain-like IL-1 converting enzyme (FLIP) levels. Sodium salicylate achieved its effects by reducing the elevated NF-kappaB responsiveness and FLIP levels and restoring the apoptotic response of TNF rather than the proliferative/proinflammatory effects of the cytokine in these cancer cells. Inhibition of NF-kappaB or FLIP levels in human erythroleukemia cells by pharmacological or molecular-biological means also resulted in switching the character of these cells from a TNF-responsive proliferative phenotype into an apoptotic one. These findings expose that the enhanced proliferative nature of human leukemia cells is caused by elevated NF-kappaB and FLIP responses and basal levels, reversible by sodium salicylate to allow greater apoptotic responsiveness of cytotoxic stimuli such as TNF. Such findings provide insight into the molecular mechanisms by which human leukemia cells can switch from a proliferative into an apoptotic phenotype.
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Affiliation(s)
- Colin Rae
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich NR4 7TJ, United Kingdom
| | - Susana Langa
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich NR4 7TJ, United Kingdom
| | - Steven J. Tucker
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich NR4 7TJ, United Kingdom
| | - David J. MacEwan
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich NR4 7TJ, United Kingdom
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41
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The Role of TNF-α and its Receptors in the Production of β-1,4 Galactosyltransferase I and V mRNAs by Rat Primary Astrocytes. J Mol Neurosci 2007; 33:155-62. [DOI: 10.1007/s12031-007-0033-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2007] [Revised: 11/30/1999] [Accepted: 04/04/2007] [Indexed: 01/22/2023]
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42
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Yu X, Wang L, Yan C, Li X. Expression and localization of tumor necrosis factor receptor 1 protein in the chorionic villi in early normal and spontaneous abortion. Eur J Obstet Gynecol Reprod Biol 2007; 132:58-63. [PMID: 16859822 DOI: 10.1016/j.ejogrb.2006.05.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2005] [Revised: 02/09/2006] [Accepted: 05/01/2006] [Indexed: 11/29/2022]
Abstract
BACKGROUND Increasing tumor necrosis factor alpha (TNFalpha) expression is found to be positively associated with spontaneous abortion. TNFalpha acts through the binding of two types of transmembrane receptors called TNFR1 and TNFR2. Here we compare membrane TNFR1 (mTNFR1) protein expression on chorionic villi in women with spontaneous abortion (SA) and viable pregnancy. METHODS In a prospective study, 31 women with SA and 30 with a viable pregnancy were studied. Chorionic villous membrane TNFR1 was detected by confocal laser scanning microscopy and immunohistochemistry. RESULTS The mTNFR1 protein is expressed in villous stromal, vessel endothelial, syncytiotrophoblast, and cytotrophoblast cells in early pregnancy. The intensity of mTNFR1 fluorescence (mean+/-S.D.) in villous stromal cells was higher in the abortion groups than in the control group (35.99+/-6.35 versus 32.64+/-5.01; p<0.05). In the abortion groups, villous cytotrophoblast cells were intensely positive for mTNFR1, whereas mTNFR1 staining of vessel endothelial and syncytiotrophoblast cells was significantly lower (p<0.001). CONCLUSION Abundant mTNFR1 expression in the cytotrophoblast cells in women with SA may mediate TNFalpha to induce programmed cell death in the mTNFR1-expressing cytotrophoblasts to limit their growth. The over-expressing mTNFR1 in villous stromal cells, mediating TNFalpha effects, may cause pathological changes or tissue damage in chorionic villi locally in nonviable pregnancies.
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Affiliation(s)
- Xuewen Yu
- Center of Maternal and Child Health, First Affiliated Hospital of Medical School in Xi'an Jiaotong University, Xi'an, China.
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43
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Wei XH, Zang Y, Wu CY, Xu JT, Xin WJ, Liu XG. Peri-sciatic administration of recombinant rat TNF-alpha induces mechanical allodynia via upregulation of TNF-alpha in dorsal root ganglia and in spinal dorsal horn: the role of NF-kappa B pathway. Exp Neurol 2007; 205:471-84. [PMID: 17459378 DOI: 10.1016/j.expneurol.2007.03.012] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2006] [Revised: 02/22/2007] [Accepted: 03/06/2007] [Indexed: 02/06/2023]
Abstract
Previous studies have shown that tumor necrosis factor-alpha (TNF-alpha) and TNF receptor 1 (TNFR1) in dorsal root ganglia (DRG) and in spinal dorsal horn are upregulated after nerve injury and that many TNF-alpha-containing neurons overexpress TNFR1. In the present study, we found that peri-sciatic administration of rat recombinant TNF-alpha (rrTNF) at the concentrations of 10, 100 and 1000 pg/ml (daily for 2 days) induced mechanical allodynia in bilateral hindpaws, lasting for about 20 days. The immunoreactivity (IR) of TNF-alpha and TNFR1 in the ipsilateral (but not in the contralateral) L4 and L5 DRGs increased significantly on day 1 and day 3 after administration of rrTNF, respectively. Double immunofluorescence staining revealed that in DRGs the increased TNF-alpha-IR was mainly in neuronal cells and with a lesser extent in satellite glial cells, while the upregulation of TNFR1-IR was almost restricted at neuronal cells. TNF-alpha-IR but not TNFR1-IR also increased in bilateral lumbar spinal dorsal horn from day 3 to day 14, which was observed in astrocytes, microglias and neurons. In addition, a progressive infiltration of monocyte/macrophages and T lymphocytes in the ipsilateral L5 DRG and sciatic nerve was observed, starting on day 2 following administration of rrTNF. Intrathecal delivery of PDTC (8.2 ng in 10 microl volume), a nuclear factor-kappa B (NF-kappaB) inhibitor, 30 min before each rrTNF administration blocked mechanical allodynia completely and inhibited the upregulation of TNF-alpha-IR and TNFR1-IR substantially. The results suggest that peri-sciatic administration of rrTNF may induce mechanical allodynia by an autocrine mechanism via activation of the NF-kappaB pathway.
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Affiliation(s)
- Xu-Hong Wei
- Pain Research Center, Department of Physiology, Zhongshan Medical School of Sun Yat-Sen University, 74 Zhongshan Rd. 2, Guangzhou, PR China
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44
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Zhou Z, Connell MC, MacEwan DJ. TNFR1-induced NF-kappaB, but not ERK, p38MAPK or JNK activation, mediates TNF-induced ICAM-1 and VCAM-1 expression on endothelial cells. Cell Signal 2007; 19:1238-48. [PMID: 17292586 DOI: 10.1016/j.cellsig.2006.12.013] [Citation(s) in RCA: 155] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2006] [Accepted: 12/27/2006] [Indexed: 01/08/2023]
Abstract
Tumour necrosis factor (TNF) is a pro-inflammatory cytokine, whose primary targets include vascular endothelial cells. TNF-mediated adhesion molecule expression has been shown to play a central role in endothelial cells inflammatory responses and disorders such as atherosclerosis. However it is not fully understand how the TNF receptor subtypes, namely TNFR1 and TNFR2, regulate inflammatory responses in endothelial cells. The aim of this study was to elucidate the kinase signalling pathways that TNF receptors activate, and determine the pathways responsible for downstream expression of adhesion molecules, intracellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1) in human endothelial cells. Using human umbilical vein endothelial cells (HUVEC), we demonstrated that TNF activates a range of mitogen-activated protein kinases (MAPKs), including the extracellular-regulated kinase (ERK) pathway and the p38MAPK and c-Jun N-terminal kinase (JNK) stress kinase pathways. Human endothelial cells express both TNF receptor subtypes at low levels, however using TNFR-specific agonistic agents, we uncovered that TNF acts through its TNFR1 receptor subtype to activate NF-kappaB transcriptional pathways. Further investigation revealed that ICAM-1 and VCAM-1 mRNA and protein are induced by TNFR1 (but not TNFR2) in a wholly NF-kappaB-dependent manner. These findings reveal for the first time that TNF stimulation of adhesion molecules ICAM-1 and VCAM-1 in human endothelial cells occurs through the TNFR1 subtype and is mediated by the NF-kappaB pathway, but not the ERK, p38MAPK or JNK kinase pathways.
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Affiliation(s)
- Zhigang Zhou
- School of Chemical Sciences and Pharmacy, University of East Anglia, Norwich, NR4 7TJ, United Kingdom
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45
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Kuno R, Yoshida Y, Nitta A, Nabeshima T, Wang J, Sonobe Y, Kawanokuchi J, Takeuchi H, Mizuno T, Suzumura A. The role of TNF-alpha and its receptors in the production of NGF and GDNF by astrocytes. Brain Res 2006; 1116:12-8. [PMID: 16956589 DOI: 10.1016/j.brainres.2006.07.120] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2006] [Revised: 07/22/2006] [Accepted: 07/29/2006] [Indexed: 12/31/2022]
Abstract
The neurotrophic factors, nerve growth factor (NGF) and glial cell line-derived neurotrophic factor (GDNF), are produced by astrocytes, and are induced by inflammatory stimuli including bacterial lipopolysaccharide and pro-inflammatory cytokines. In this study, we examined the regulatory mechanisms of tumor necrosis factor-alpha (TNF-alpha)-induced production of neurotrophic factors. We show here that cultured astrocytes express both TNF-alpha receptor 1 (TNFR1) and TNFR2, and that activation of these receptors by TNF-alpha promotes expression of both NGF and GDNF. In addition, we observe that not only exogenous TNF-alpha but also TNF-alpha produced by astrocytes induce NGF and GDNF production in astrocytes. These results suggest that an autocrine loop involving TNF-alpha contributes to the production of neurotrophic factors in response to inflammation.
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Affiliation(s)
- Reiko Kuno
- Department of Neuroimmunology, Institute of Environmental Medicine, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
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46
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Rebelo SL, Bainbridge SE, Amel-Kashipaz MR, Radford PM, Powell RJ, Todd I, Tighe PJ. Modeling of tumor necrosis factor receptor superfamily 1A mutants associated with tumor necrosis factor receptor–associated periodic syndrome indicates misfolding consistent with abnormal function. ACTA ACUST UNITED AC 2006; 54:2674-87. [PMID: 16871532 DOI: 10.1002/art.21964] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To investigate the effect of mutations in the tumor necrosis factor receptor superfamily 1A (TNFRSF1A) gene on the conformation and behavior of the TNFRSF1A protein. Mutations in TNFRSF1A cause the autosomal-dominant, autoinflammatory TNFR-associated periodic syndrome (TRAPS). METHODS The expression of recombinant TNFRSF1A was compared in SK-HEp-1 endothelial cells and HEK 293 epithelial cells stably transfected with full-length R347A or Deltasig constructs of wild-type or TRAPS-associated mutant TNFRSF1A. TNF binding was assessed in HEK 293 cell lines expressing R347A wild-type or mutant TNFRSF1A. Homology modeling of the 3-dimensional structure of the ectodomains of wild-type and mutant TNFRSF1A was performed. RESULTS TRAPS-associated mutant and wild-type TNFRSF1A behaved differently and had different localization properties within the cell, as a direct result of mutations in the ectodomains of TNFRSF1A. From a structural perspective, mutants with a predicted structure similar to that of the wild-type protein (e.g., R92Q) behaved similarly to wild-type TNFRSF1A, whereas forms of TNFRSF1A with mutations predicted to drastically destabilize the protein structure (e.g., cysteine mutations) showed defects in cell surface expression and TNF binding. CONCLUSION The results obtained from the in vitro experiments, in combination with the modeled structures, indicate that the phenotype and clinical differences between different TRAPS-associated mutants of TNFRSF1A result from different conformations of the TNFRSF1A ectodomains.
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MESH Headings
- Carcinoma, Hepatocellular/genetics
- Carcinoma, Hepatocellular/metabolism
- Carcinoma, Hepatocellular/pathology
- Cell Line, Tumor
- Epithelial Cells/cytology
- Epithelial Cells/metabolism
- Familial Mediterranean Fever/genetics
- Familial Mediterranean Fever/metabolism
- Familial Mediterranean Fever/pathology
- Humans
- Kidney/cytology
- Kidney/metabolism
- Models, Molecular
- Mutation, Missense
- Protein Binding
- Protein Conformation
- Protein Folding
- Receptors, Tumor Necrosis Factor, Type I/chemistry
- Receptors, Tumor Necrosis Factor, Type I/genetics
- Receptors, Tumor Necrosis Factor, Type I/metabolism
- Recombinant Fusion Proteins/metabolism
- Tumor Necrosis Factor-alpha/metabolism
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47
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Matsuyama R, Togo S, Shimizu D, Momiyama N, Ishikawa T, Ichikawa Y, Endo I, Kunisaki C, Suzuki H, Hayasizaki Y, Shimada H. Predicting 5-fluorouracil chemosensitivity of liver metastases from colorectal cancer using primary tumor specimens: Three-gene expression model predicts clinical response. Int J Cancer 2006; 119:406-13. [PMID: 16477629 DOI: 10.1002/ijc.21843] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We identified genes related to 5-fluorouracil (5-FU) sensitivity in colorectal cancer and utilized these genes for predicting the 5-FU sensitivity of liver metastases. Eighty-one candidate genes involved in 5-FU resistance in gastric and colon cancer cell lines were previously identified using a cDNA microarray. In this study, the mRNA expression levels of these 81 selected genes and the genes of 5-FU-related enzymes, including thymidylate synthase (TS), dihydropyrimidine dehydrogenase (DPD) and orotate phosphoribosyltransferase (OPRT), were measured using real-time quantitative RT-PCR assays of surgically resected materials from primary colorectal tumors in 22 patients. Clinical responses were estimated by evaluating the effects of 5-FU-based hepatic artery injection (HAI) chemotherapy for synchronous liver metastases. Four genes (TNFRSF1B, SLC35F5, NAG-1 and OPRT) had significantly different expression profiles in 5-FU-nonresponding and responding tumors (p < 0.05). A "Response Index" system using three genes (TNFRSF1B, SLC35F5 and OPRT) was then developed using a discriminate analysis; the results were well correlated with the individual chemosensitivities. Among the 11 cases with positive scores in our response index, 9 achieved a reduction in their liver metastases after 5-FU-based chemotherapy, whereas only 1 of the 11 cases with negative scores responded well to chemotherapy. Our "Response Index" system, consisting of TNFRSF1B, SLC35F5 and OPRT, has great potential for predicting the efficacy of 5-FU-based chemotherapy against liver metastases from colorectal cancer.
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MESH Headings
- Aged
- Antimetabolites, Antineoplastic/pharmacology
- Biomarkers, Tumor/analysis
- Biomarkers, Tumor/genetics
- Colorectal Neoplasms/metabolism
- Colorectal Neoplasms/pathology
- Cytokines/analysis
- DNA, Complementary
- Dihydrouracil Dehydrogenase (NADP)/analysis
- Discriminant Analysis
- Drug Resistance, Neoplasm/genetics
- Female
- Fluorouracil/pharmacology
- Gene Expression Regulation, Enzymologic
- Gene Expression Regulation, Neoplastic
- Growth Differentiation Factor 15
- Humans
- Liver Neoplasms/drug therapy
- Liver Neoplasms/genetics
- Liver Neoplasms/metabolism
- Liver Neoplasms/secondary
- Male
- Middle Aged
- Neoplasm Proteins/analysis
- Neoplasm Proteins/genetics
- Oligonucleotide Array Sequence Analysis
- Orotate Phosphoribosyltransferase/analysis
- Predictive Value of Tests
- RNA, Messenger/analysis
- RNA, Neoplasm/analysis
- Receptors, Tumor Necrosis Factor/analysis
- Receptors, Tumor Necrosis Factor, Type II
- Reverse Transcriptase Polymerase Chain Reaction
- Thymidylate Synthase/analysis
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Affiliation(s)
- Ryusei Matsuyama
- Department of Gastroenterological Surgery, Yokohama City University, Graduate School of Medicine, Fukuura, Kanazawa-ku, Yokohama, Kanagawa, Japan
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48
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Chung AS, Guan YJ, Yuan ZL, Albina JE, Chin YE. Ankyrin repeat and SOCS box 3 (ASB3) mediates ubiquitination and degradation of tumor necrosis factor receptor II. Mol Cell Biol 2005; 25:4716-26. [PMID: 15899873 PMCID: PMC1140645 DOI: 10.1128/mcb.25.11.4716-4726.2005] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2004] [Revised: 01/14/2005] [Accepted: 02/14/2005] [Indexed: 11/20/2022] Open
Abstract
Ankyrin repeat and SOCS box (ASB) family members have a C-terminal SOCS box and an N-terminal ankyrin-related sequence of variable repeats belonging to the SOCS superfamily. While SH2-domain-bearing SOCS proteins are mainly involved in the negative feedback regulation of the protein tyrosine kinase-STAT pathway in response to a variety of cytokines, the roles of ASB family members remain largely unknown. To investigate ASB functions, we screened for ASB3-interacting factors by using antibody array technology and identified tumor necrosis factor receptor II (TNF-R2) as an ASB3 binding target. ASB3 expression and activities are required for (i) TNF-R2 ubiquitination both in vivo and in vitro, (ii) TNF-R2 proteolysis via the proteasome pathway, and (iii) the inhibition of TNF-R2-mediated Jun N-terminal protein kinase (JNK) activation. While the ankyrin repeats of ASB3 interact with the C-terminal 37 amino acids of TNF-R2, the SOCS box of ASB3 is responsible for recruiting the E3 ubiquitin ligase adaptors Elongins-B/C, leading to TNF-R2 ubiquitination on multiple lysine residues within its C-terminal region. Downregulation of ASB3 expression by a small interfering RNA inhibited TNF-R2 degradation and potentiated TNF-R2-mediated cytotoxicity. The data presented here implicate ASB3 as a negative regulator of TNF-R2-mediated cellular responses to TNF-alpha by direct targeting of TNF-R2 for ubiquitination and proteasome-mediated degradation.
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Affiliation(s)
- Alicia S Chung
- Department of Molecular and Cell Biology and Biochemistry, Brown University School of Medicine and Rhode Island Hospital, Providence, RI 02903, USA
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Thommesen L, Laegreid A. Distinct Differences between TNF Receptor 1- and TNF Receptor 2- mediated Activation of NFκB. BMB Rep 2005; 38:281-9. [PMID: 15943902 DOI: 10.5483/bmbrep.2005.38.3.281] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Tumor necrosis factor (TNF) signaling is mediated via two distinct receptors, TNFR2 and TNFR1, which shows partially overlapping signaling mechanisms and biological roles. In the present study, TNFR2 and TNFR1 signal transduction mechanisms involved in activation of NFkappaB and CMV promoter-enhancer were compared with respect to their susceptibility towards inhibitors of intracellular signaling. For this, we used SW480 cells, where we have shown that TNF-signaling can occur independently through each of the two receptors. The TNFR1 response was inhibited by D609, bromophenacyl bromide (BPB), nordihydroguararetic acid (NDGA), and by sodium salicylate, while TNFR2-mediated activation of NFkappaB and CMV promoter-enhancer was resistant to these compounds. The signaling mechanisms known to be affected by these inhibitors include phospholipases as well as redox- and pH-sensitive intracellular components. Our results imply that TNFR2 signaling involved in NFkappaB activation proceeds independently of these inhibitor-sensitive signaling components, indicating distinct signaling pathways not shared with TNFR1.
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MESH Headings
- Cell Line, Tumor
- Colonic Neoplasms
- Cytomegalovirus/genetics
- Enhancer Elements, Genetic
- Genes, Reporter
- Humans
- NF-kappa B/metabolism
- Promoter Regions, Genetic
- Receptors, Tumor Necrosis Factor, Type I/drug effects
- Receptors, Tumor Necrosis Factor, Type I/physiology
- Receptors, Tumor Necrosis Factor, Type II/drug effects
- Receptors, Tumor Necrosis Factor, Type II/physiology
- Sodium Salicylate/pharmacology
- Tetradecanoylphorbol Acetate/pharmacology
- beta-Galactosidase/genetics
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Affiliation(s)
- Liv Thommesen
- Norwegian University of Science and Technology, Department of Cancer Research and Molecular Medicine, Sør-Trøndelag University College, Faculty of Technology, N-7489 Trondheim, Norway.
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50
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Yu XW, Yan CF, Jin H, Li X. Tumor necrosis factor receptor 1 expression and early spontaneous abortion. Int J Gynaecol Obstet 2005; 88:44-8. [PMID: 15617704 DOI: 10.1016/j.ijgo.2004.08.020] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2004] [Revised: 08/24/2004] [Accepted: 08/25/2004] [Indexed: 12/17/2022]
Abstract
OBJECTIVES To compare tumor necrosis factor receptor 1 (TNFR1) protein expression in women with unexplained early spontaneous abortion (UESA) and normal pregnancy. METHODS In a prospective study, 62 women with UESA and 60 with normal pregnancy were studied. Decidual membrane TNFR1 was detected by flow cytometry and immunohistochemistry, and serum soluble TNFR1 were by ELISA. Statistical analyses of resulting data employed the student's t test, the Fisher's Exact, and the nonparametric Wilcoxon test RESULTS The percentage of membrane tumor necrosis factor receptor 1 (mTNFR1) positive decidual cells was 16.42+/-7.1 for women with UESA and 12.47+/-5.3 for women with normal pregnancy (p<0.05). The number of mTNFR1 positive cells was more in decidual stromal and vessel endothelial cells in women with UESA, and serum soluble tumor necrosis factor receptor 1 (sTNFR1) concentration was significantly higher than in women with normal pregnancy (554.56+/-126.7 pg/ml vs. 175.3+/-52.4 pg/ml; p<0.001). CONCLUSION The overexpression of TNFR1 may contribute to the development of ESA.
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Affiliation(s)
- X W Yu
- Center of Maternal and Child Health, First Hospital of Xi'an Jiaotong University, Xi'an, 710061 China.
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