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Tang L, Okamoto S, Shiuchi T, Toda C, Takagi K, Sato T, Saito K, Yokota S, Minokoshi Y. Sympathetic Nerve Activity Maintains an Anti-Inflammatory State in Adipose Tissue in Male Mice by Inhibiting TNF-α Gene Expression in Macrophages. Endocrinology 2015; 156:3680-94. [PMID: 26132918 DOI: 10.1210/en.2015-1096] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Adipose tissue macrophages (ATMs) play an important role in the inflammatory response in obese animals. How ATMs are regulated in lean animals has remained elusive, however. We now show that the sympathetic nervous system (SNS) is necessary to maintain the abundance of the mRNA for the proinflammatory cytokine TNF-α at a low level in ATMs of lean mice. Intracerebroventricular injection of agouti-related neuropeptide increased the amount of TNF-α mRNA in epididymal (epi) white adipose tissue (WAT), but not in interscapular brown adipose tissue (BAT), through inhibition of sympathetic nerve activity in epiWAT. The surgical denervation and β-adrenergic antagonist propranolol up-regulated TNF-α mRNA in both epiWAT and BAT in vivo. Signaling by the β2-adrenergic receptor (AR) and protein kinase A down-regulated TNF-α mRNA in epiWAT explants and suppressed lipopolysaccharide-induced up-regulation of TNF-α mRNA in the stromal vascular fraction of this tissue. β-AR-deficient (β-less) mice manifested an increased plasma TNF-α concentration and increased TNF-α mRNA abundance in epiWAT and BAT. TNF-α mRNA abundance was greater in ATMs (CD11b(+) cells of the stromal vascular fraction) from epiWAT or BAT of wild-type mice than in corresponding CD11b(-) cells, and β2-AR mRNA abundance was greater in ATMs than in CD11b(-) cells of epiWAT. Our results show that the SNS and β2-AR-protein kinase A pathway maintain an anti-inflammatory state in ATMs of lean mice in vivo, and that the brain melanocortin pathway plays a role in maintaining this state in WAT of lean mice via the SNS.
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MESH Headings
- Adipose Tissue, Brown/drug effects
- Adipose Tissue, Brown/innervation
- Adipose Tissue, Brown/metabolism
- Adipose Tissue, White/drug effects
- Adipose Tissue, White/innervation
- Adipose Tissue, White/metabolism
- Adrenergic beta-Antagonists/pharmacology
- Agouti-Related Protein/administration & dosage
- Animals
- Cell Line
- Epididymis/drug effects
- Epididymis/metabolism
- Gene Expression/drug effects
- Immunoblotting
- Inflammation Mediators/metabolism
- Injections, Intraventricular
- Macrophages/metabolism
- Male
- Mice, Inbred C57BL
- Mice, Knockout
- Peptide Fragments/administration & dosage
- Propranolol/pharmacology
- Receptors, Adrenergic, beta/genetics
- Receptors, Adrenergic, beta/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Sympathectomy
- Sympathetic Nervous System/metabolism
- Tumor Necrosis Factor-alpha/genetics
- Tumor Necrosis Factor-alpha/metabolism
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Affiliation(s)
- Lijun Tang
- Division of Endocrinology and Metabolism (L.T., S.O., K.T., T.Sa., K.S., S.Y., Y.M.), Department of Developmental Physiology, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan; Department of Physiological Sciences (S.O., T.Sa., Y.M.), Sokendai (The Graduate University for Advanced Studies), Hayama, Kanagawa 240-0193, Japan; Department of Integrative Physiology (T.Sh.), Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima City, Tokushima 770-8503, Japan; and Section of Comparative Medicine (C.T.), Yale University School of Medicine, New Haven, Connecticut 06520-8016
| | - Shiki Okamoto
- Division of Endocrinology and Metabolism (L.T., S.O., K.T., T.Sa., K.S., S.Y., Y.M.), Department of Developmental Physiology, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan; Department of Physiological Sciences (S.O., T.Sa., Y.M.), Sokendai (The Graduate University for Advanced Studies), Hayama, Kanagawa 240-0193, Japan; Department of Integrative Physiology (T.Sh.), Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima City, Tokushima 770-8503, Japan; and Section of Comparative Medicine (C.T.), Yale University School of Medicine, New Haven, Connecticut 06520-8016
| | - Tetsuya Shiuchi
- Division of Endocrinology and Metabolism (L.T., S.O., K.T., T.Sa., K.S., S.Y., Y.M.), Department of Developmental Physiology, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan; Department of Physiological Sciences (S.O., T.Sa., Y.M.), Sokendai (The Graduate University for Advanced Studies), Hayama, Kanagawa 240-0193, Japan; Department of Integrative Physiology (T.Sh.), Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima City, Tokushima 770-8503, Japan; and Section of Comparative Medicine (C.T.), Yale University School of Medicine, New Haven, Connecticut 06520-8016
| | - Chitoku Toda
- Division of Endocrinology and Metabolism (L.T., S.O., K.T., T.Sa., K.S., S.Y., Y.M.), Department of Developmental Physiology, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan; Department of Physiological Sciences (S.O., T.Sa., Y.M.), Sokendai (The Graduate University for Advanced Studies), Hayama, Kanagawa 240-0193, Japan; Department of Integrative Physiology (T.Sh.), Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima City, Tokushima 770-8503, Japan; and Section of Comparative Medicine (C.T.), Yale University School of Medicine, New Haven, Connecticut 06520-8016
| | - Kazuyo Takagi
- Division of Endocrinology and Metabolism (L.T., S.O., K.T., T.Sa., K.S., S.Y., Y.M.), Department of Developmental Physiology, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan; Department of Physiological Sciences (S.O., T.Sa., Y.M.), Sokendai (The Graduate University for Advanced Studies), Hayama, Kanagawa 240-0193, Japan; Department of Integrative Physiology (T.Sh.), Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima City, Tokushima 770-8503, Japan; and Section of Comparative Medicine (C.T.), Yale University School of Medicine, New Haven, Connecticut 06520-8016
| | - Tatsuya Sato
- Division of Endocrinology and Metabolism (L.T., S.O., K.T., T.Sa., K.S., S.Y., Y.M.), Department of Developmental Physiology, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan; Department of Physiological Sciences (S.O., T.Sa., Y.M.), Sokendai (The Graduate University for Advanced Studies), Hayama, Kanagawa 240-0193, Japan; Department of Integrative Physiology (T.Sh.), Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima City, Tokushima 770-8503, Japan; and Section of Comparative Medicine (C.T.), Yale University School of Medicine, New Haven, Connecticut 06520-8016
| | - Kumiko Saito
- Division of Endocrinology and Metabolism (L.T., S.O., K.T., T.Sa., K.S., S.Y., Y.M.), Department of Developmental Physiology, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan; Department of Physiological Sciences (S.O., T.Sa., Y.M.), Sokendai (The Graduate University for Advanced Studies), Hayama, Kanagawa 240-0193, Japan; Department of Integrative Physiology (T.Sh.), Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima City, Tokushima 770-8503, Japan; and Section of Comparative Medicine (C.T.), Yale University School of Medicine, New Haven, Connecticut 06520-8016
| | - Shigefumi Yokota
- Division of Endocrinology and Metabolism (L.T., S.O., K.T., T.Sa., K.S., S.Y., Y.M.), Department of Developmental Physiology, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan; Department of Physiological Sciences (S.O., T.Sa., Y.M.), Sokendai (The Graduate University for Advanced Studies), Hayama, Kanagawa 240-0193, Japan; Department of Integrative Physiology (T.Sh.), Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima City, Tokushima 770-8503, Japan; and Section of Comparative Medicine (C.T.), Yale University School of Medicine, New Haven, Connecticut 06520-8016
| | - Yasuhiko Minokoshi
- Division of Endocrinology and Metabolism (L.T., S.O., K.T., T.Sa., K.S., S.Y., Y.M.), Department of Developmental Physiology, National Institute for Physiological Sciences, Okazaki, Aichi 444-8585, Japan; Department of Physiological Sciences (S.O., T.Sa., Y.M.), Sokendai (The Graduate University for Advanced Studies), Hayama, Kanagawa 240-0193, Japan; Department of Integrative Physiology (T.Sh.), Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima City, Tokushima 770-8503, Japan; and Section of Comparative Medicine (C.T.), Yale University School of Medicine, New Haven, Connecticut 06520-8016
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52
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Saliba Y, Karam R, Smayra V, Aftimos G, Abramowitz J, Birnbaumer L, Farès N. Evidence of a Role for Fibroblast Transient Receptor Potential Canonical 3 Ca2+ Channel in Renal Fibrosis. J Am Soc Nephrol 2015; 26:1855-76. [PMID: 25479966 PMCID: PMC4520158 DOI: 10.1681/asn.2014010065] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 09/23/2014] [Indexed: 01/04/2023] Open
Abstract
Transient receptor potential canonical (TRPC) Ca(2+)-permeant channels, especially TRPC3, are increasingly implicated in cardiorenal diseases. We studied the possible role of fibroblast TRPC3 in the development of renal fibrosis. In vitro, a macromolecular complex formed by TRPC1/TRPC3/TRPC6 existed in isolated cultured rat renal fibroblasts. However, specific blockade of TRPC3 with the pharmacologic inhibitor pyr3 was sufficient to inhibit both angiotensin II- and 1-oleoyl-2-acetyl-sn-glycerol-induced Ca(2+) entry in these cells, which was detected by fura-2 Ca(2+) imaging. TRPC3 blockade or Ca(2+) removal inhibited fibroblast proliferation and myofibroblast differentiation by suppressing the phosphorylation of extracellular signal-regulated kinase (ERK1/2). In addition, pyr3 inhibited fibrosis and inflammation-associated markers in a noncytotoxic manner. Furthermore, TRPC3 knockdown by siRNA confirmed these pharmacologic findings. In adult male Wistar rats or wild-type mice subjected to unilateral ureteral obstruction, TRPC3 expression increased in the fibroblasts of obstructed kidneys and was associated with increased Ca(2+) entry, ERK1/2 phosphorylation, and fibroblast proliferation. Both TRPC3 blockade in rats and TRPC3 knockout in mice inhibited ERK1/2 phosphorylation and fibroblast activation as well as myofibroblast differentiation and extracellular matrix remodeling in obstructed kidneys, thus ameliorating tubulointerstitial damage and renal fibrosis. In conclusion, TRPC3 channels are present in renal fibroblasts and control fibroblast proliferation, differentiation, and activation through Ca(2+)-mediated ERK signaling. TRPC3 channels might constitute important therapeutic targets for improving renal remodeling in kidney disease.
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Affiliation(s)
- Youakim Saliba
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine and
| | - Ralph Karam
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine and
| | - Viviane Smayra
- Faculty of Medicine, Saint Joseph University, Beirut, Lebanon
| | - Georges Aftimos
- Department of Anatomopathology, National Institute of Pathology, Baabda, Lebanon; and
| | - Joel Abramowitz
- Laboratory of Neurobiology, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina
| | - Lutz Birnbaumer
- Laboratory of Neurobiology, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina
| | - Nassim Farès
- Physiology and Pathophysiology Research Laboratory, Pole of Technology and Health, Faculty of Medicine and
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53
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Rajasekaran S, Tamatam CR, Potteti HR, Raman V, Lee JW, Matthay MA, Mehta D, Reddy NM, Reddy SP. Visualization of Fra-1/AP-1 activation during LPS-induced inflammatory lung injury using fluorescence optical imaging. Am J Physiol Lung Cell Mol Physiol 2015; 309:L414-24. [PMID: 26071555 DOI: 10.1152/ajplung.00315.2014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 06/08/2015] [Indexed: 01/11/2023] Open
Abstract
Inappropriate lung inflammatory response following oxidant and toxicant exposure can lead to abnormal repair and disease pathogenesis, including fibrosis. Thus early detection of molecular and cellular processes and mediators promoting lung inflammation is necessary to develop better strategies for therapeutic intervention and disease management. Previously, we have shown that transcription factor Fra-1/AP-1 plays key roles in lung inflammatory response, as Fra-1-null mice are less susceptible than wild-type mice to LPS-induced lung injury and mortality. Herein, we developed a transgenic reporter mouse model expressing tdTomato under the control of FRA-1 (human) promoter (referred to as FRA-1(TdTg) mice) to monitor its activation during inflammatory lung injury using fluorescence protein-based optical imaging and molecular analysis in vivo and ex vivo. A higher red fluorescent signal was observed in the lungs of LPS-treated FRA-1(TdTg) mice compared with vehicle controls, and Western blot and qRT-PCR analyses revealed a significant correlation with the FRA-1-tdTomato reporter expression. Immunocolocalization demonstrated expression of FRA-1-tdTomato largely in lung alveolar macrophages and to some extent in epithelial cells. Moreover, we validated these results with a second reporter mouse model that expressed green fluorescent protein upon activation of endogenous Fra-1 promoter. Additionally, we demonstrated increased expression of FRA-1 in alveolar macrophages in human lung instilled with Escherichia coli ex vivo. Collectively, our data obtained from two independent reporter mouse models and from human samples underscore the significance of Fra-1 activation in alveolar macrophages during inflammatory lung injury and may aid in developing strategies to target this transcription factor in lung injury and repair.
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Affiliation(s)
- Subbiah Rajasekaran
- Division of Developmental Biology and Basic Research, Department of Pediatrics, University of Illinois at Chicago, Chicago, Illinois
| | - Chandramohan R Tamatam
- Division of Developmental Biology and Basic Research, Department of Pediatrics, University of Illinois at Chicago, Chicago, Illinois
| | - Haranatha R Potteti
- Division of Developmental Biology and Basic Research, Department of Pediatrics, University of Illinois at Chicago, Chicago, Illinois
| | - Venu Raman
- Division of Cancer Imaging Research, Department of Radiology and Radiological Sciences, The Johns Hopkins University, Baltimore, Maryland
| | - Jae-Woo Lee
- Departments of Medicine and Anesthesia, Cardiovascular Research Institute, University of California, San Francisco, California
| | - Michael A Matthay
- Departments of Medicine and Anesthesia, Cardiovascular Research Institute, University of California, San Francisco, California
| | - Dolly Mehta
- Department of Pharmacology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Narsa M Reddy
- Division of Developmental Biology and Basic Research, Department of Pediatrics, University of Illinois at Chicago, Chicago, Illinois;
| | - Sekhar P Reddy
- Division of Developmental Biology and Basic Research, Department of Pediatrics, University of Illinois at Chicago, Chicago, Illinois
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54
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Surayot U, Wang J, Lee JH, Kanongnuch C, Peerapornpisal Y, You S. Characterization and immunomodulatory activities of polysaccharides from Spirogyra neglecta (Hassall) Kützing. Biosci Biotechnol Biochem 2015; 79:1644-53. [PMID: 25971153 DOI: 10.1080/09168451.2015.1043119] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Sulfated polysaccharides (SP) isolated from freshwater green algae, Spirogyra neglecta (Hassall) Kützing, and fractionated SPs were examined to investigate their molecular characteristics and immunomodulatory activity. The crude and fractionated SPs (F1, F2, and F3) consisted mostly of carbohydrates (68.5-85.3%), uronic acids (3.2-4.9%), and sulfates (2.2-12.2%) with various amounts of proteins (2.6-17.1%). D-galactose (23.5-27.3%), D-glucose (11.5-24.8%), L-fucose (19.0-26.7%), and L-rhamnose (16.4-18.3%) were the major monosaccharide units of these SPs with different levels of L-arabinose (3.0-9.4%), D-xylose (4.6-9.8%), and D-mannose (0.4-2.3%). The SPs contained two sub-fractions with molecular weights (Mw) ranging from 164 × 10(3) to 1460 × 10(3) g/mol. The crude and fractionated SPs strongly stimulated murine macrophages, producing considerable amounts of nitric oxide and various cytokines via up-regulation of their mRNA expression by activation of nuclear factor-kappa B and mitogen-activated protein kinases pathways. The main backbone of the most immunoenhancing SP was (1→3)-L-Fucopyranoside, (1→4,6)-D-Glucopyranoside, and (1→4)-D-Galactopyranoside.
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Affiliation(s)
- Utoomporn Surayot
- a Department of Marine Food Science and Technology , Gangneung-Wonju National University , Gangneung , Republic of Korea
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55
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Lee JH, Kim TH, Kim HS, Kim AR, Kim DK, Nam ST, Kim HW, Park YH, Her E, Park YM, Kim HS, Kim YM, Choi WS. An indoxyl compound 5-bromo-4-chloro-3-indolyl 1,3-diacetate, CAC-0982, suppresses activation of Fyn kinase in mast cells and IgE-mediated allergic responses in mice. Toxicol Appl Pharmacol 2015; 285:179-86. [PMID: 25902337 DOI: 10.1016/j.taap.2015.04.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 01/16/2015] [Accepted: 04/01/2015] [Indexed: 11/17/2022]
Abstract
Mast cells, constituents of virtually all organs and tissues, are critical cells in IgE-mediated allergic responses. The aim of this study was to investigate the effect and mechanism of an indoxyl chromogenic compound, 5-bromo-4-chloro-3-indolyl 1,3-diacetate, CAC-0982, on IgE-mediated mast cell activation and allergic responses in mice. CAC-0982 reversibly suppressed antigen-stimulated degranulation in murine mast cells (IC50, ~3.8μM) and human mast cells (IC50, ~3.0μM). CAC-0982 also inhibited the expression and secretion of IL-4 and TNF-α in mast cells. Furthermore, CAC-0982 suppressed the mast cell-mediated allergic responses in mice in a dose-dependent manner (ED50 27.9mg/kg). As for the mechanism, CAC-0982 largely suppressed the phosphorylation of Syk and its downstream signaling molecules, including LAT, Akt, Erk1/2, p38, and JNK. Notably, the tyrosine kinase assay of antigen-stimulated mast cells showed that CAC-0982 inhibited Fyn kinase, one of the upstream tyrosine kinases for Syk activation in mast cells. Taken together, these results suggest that CAC-0982 may be used as a new treatment for regulating IgE-mediated allergic diseases through the inhibition of the Fyn/Syk pathway in mast cells.
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Affiliation(s)
- Jun Ho Lee
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea; College of Medicine, Korea University, Seoul 136-701, Republic of Korea
| | - Tae Hyung Kim
- College of Pharmacy, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Hyuk Soon Kim
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - A-Ram Kim
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Do-Kyun Kim
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea; Laboratory of Allergic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Seung Taek Nam
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Hyun Woo Kim
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Young Hwan Park
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Erk Her
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Yeong Min Park
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea
| | - Hyung Sik Kim
- College of Pharmacy, Sungkyunkwan University, Suwon 440-746, Republic of Korea
| | - Young Mi Kim
- College of Pharmacy, Duksung Women's University, Seoul 132-714, Republic of Korea
| | - Wahn Soo Choi
- Department of Immunology, School of Medicine, Konkuk University, Chungju 380-701, Republic of Korea.
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56
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Wang C, Gao L, Jin Y, Cardona CJ, Xing Z. Regulation of host responses and viral replication by the mitogen-activated protein kinases in intestinal epithelial cells infected with Enterovirus 71. Virus Res 2015; 197:75-84. [DOI: 10.1016/j.virusres.2014.12.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 12/07/2014] [Accepted: 12/11/2014] [Indexed: 02/03/2023]
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57
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Nanoparticle and polysaccharide conjugate: A potential candidate vaccine to improve immunological stimuli. Int J Biol Macromol 2015; 72:1254-64. [DOI: 10.1016/j.ijbiomac.2014.10.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 10/10/2014] [Accepted: 10/13/2014] [Indexed: 01/28/2023]
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58
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Wunderlich R, Ernst A, Rödel F, Fietkau R, Ott O, Lauber K, Frey B, Gaipl US. Low and moderate doses of ionizing radiation up to 2 Gy modulate transmigration and chemotaxis of activated macrophages, provoke an anti-inflammatory cytokine milieu, but do not impact upon viability and phagocytic function. Clin Exp Immunol 2015; 179:50-61. [PMID: 24730395 PMCID: PMC4260896 DOI: 10.1111/cei.12344] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/04/2014] [Indexed: 12/31/2022] Open
Abstract
Benign painful and inflammatory diseases have been treated for decades with low/moderate doses of ionizing radiation (LD-X-irradiation). Tissue macrophages regulate initiation and resolution of inflammation by the secretion of cytokines and by acting as professional phagocytes. Having these pivotal functions, we were interested in how activated macrophages are modulated by LD-X-irradiation, also with regard to radiation protection issues and carcinogenesis. We set up an ex-vivo model in which lipopolysaccharide pre-activated peritoneal macrophages (pMΦ) of radiosensitive BALB/c mice, mimicking activated macrophages under inflammatory conditions, were exposed to X-irradiation from 0·01 Gy up to 2 Gy. Afterwards, the viability of the pMΦ, their transmigration and chemotaxis, the phagocytic behaviour, the secretion of inflammatory cytokines and underlying signalling pathways were determined. Exposure of pMΦ up to a single dose of 2 Gy did not influence their viability and phagocytic function, an important fact regarding radiation protection. However, significantly reduced migration, but increased chemotaxis of pMΦ after exposure to 0·1 or 0·5 Gy, was detected. Both might relate to the resolution of inflammation. Cytokine analyses revealed that, in particular, the moderate dose of 0·5 Gy applied in low-dose radiotherapy for inflammatory diseases results in an anti-inflammatory cytokine microenvironment of pMΦ, as the secretion of the proinflammatory cytokine interleukin (IL)-1β was reduced and that of the anti-inflammatory cytokine transforming growth factor (TGF)-β increased. Further, the reduced secretion of IL-1β correlated with reduced nuclear translocation of nuclear factor (NF)-κB p65, starting at exposure of pMΦ to 0·5 Gy of X-irradiation. We conclude that inflammation is modulated by LD-X-irradiation via changing the inflammatory phenotype of macrophages.
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Affiliation(s)
- R Wunderlich
- Department of Radiation Oncology, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
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59
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Zhang G, Zhang H, Liu Y, He Y, Wang W, Du Y, Yang C, Gao F. CD44 clustering is involved in monocyte differentiation. Acta Biochim Biophys Sin (Shanghai) 2014; 46:540-7. [PMID: 24850301 DOI: 10.1093/abbs/gmu042] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Differentiation of monocytes into macrophages is an important process under physiological and pathological conditions, but the underlying mechanism of monocyte differentiation is not completely clear. Some adhesion molecules have been reported to play an important role in cell differentiation. CD44 is an important adhesion molecule that mediates cell-cell and cell-matrix interaction, and participates in a wide variety of cellular functions. As CD44 has been reported to show different activated states between monocytes and macrophages, we propose that CD44 may be involved in monocyte differentiation. In this study, we explored the role of CD44 in monocyte differentiation and further studied the mechanisms that were involved in. THP-1 cells (human monocytic leukemia cell line) were induced with phorbol 12-myristate 13-acetate (PMA) to establish the model of monocyte differentiation in vitro. It was found that CD44 expression and binding capacity to hyaluronic acid were increased significantly, and the distribution of CD44 was converted into clusters during differentiation. The PMA-induced CD44 clustering and CD44 high expression were suppressed by blocking CD44, which resulted in the inhibition of CD14 expression. PMA-induced phosphorylation of ERK1/2 signal was also suppressed by blocking CD44. Our results suggested that CD44 was involved in monocyte differentiation. The mechanisms of monocyte differentiation following CD44 activation may include CD44 high expression and clustering which in turn lead to phosphorylation of ERK1/2.
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Affiliation(s)
- Guoliang Zhang
- Department of Molecular Biology, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, China
| | - Huizhen Zhang
- Department of Pathology, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, China
| | - Yiwen Liu
- Department of Molecular Biology, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, China
| | - Yiqing He
- Department of Molecular Biology, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, China
| | - Wenjuan Wang
- Department of Molecular Biology, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, China
| | - Yan Du
- Department of Molecular Biology, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, China
| | - Cuixia Yang
- Department of Molecular Biology, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, China
| | - Feng Gao
- Department of Molecular Biology and Clinical Laboratory, Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai 200233, China
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60
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Kim EA, Han AR, Choi J, Ahn JY, Choi SY, Cho SW. Anti-inflammatory mechanisms of N-adamantyl-4-methylthiazol-2-amine in lipopolysaccharide-stimulated BV-2 microglial cells. Int Immunopharmacol 2014; 22:73-83. [PMID: 24975832 DOI: 10.1016/j.intimp.2014.06.022] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 06/03/2014] [Accepted: 06/10/2014] [Indexed: 01/03/2023]
Abstract
The activation of microglia is crucially associated with the neurodegeneration observed in many neuroinflammatory pathologies, such as multiple sclerosis, Parkinson's disease, and Alzheimer's disease. We have examined various thiazole derivatives with the goal of developing new anti-neuroinflammatory drugs. Thiazole derivatives are attractive candidates for drug development, because they are efficiently synthesized and active against a number of disease organisms and conditions, including neurodegenerative disorders. The present study investigated the effects of a new compound, N-adamantyl-4-methylthiazol-2-amine (KHG26693), against lipopolysaccharide (LPS)-induced inflammation in cultured BV-2 microglial cells. KHG26693 suppressed several inflammatory responses in LPS-activated cells, as evidenced by decreased levels of tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), hydrogen peroxide (H(2)O(2)), reactive oxygen species (ROS), nitric oxide (NO), and lipid peroxidation. These anti-inflammatory/antioxidative actions occurred as a result of the downregulation of NADPH oxidase (NOX), inducible nitric oxide synthase (iNOS), and cyclooxygenase-2 (COX-2) content, but not as a result of the upregulation of superoxide dismutase (SOD) or catalase activity. The pharmacological properties of KHG26693 were also facilitated via inhibition of both the cluster of differentiation 14 (CD14)/toll-like receptor 4 (TLR4)-dependent nuclear factor kappa B (NF-κB) signaling pathway and extracellular signal-regulated kinase (ERK) phosphorylation. Furthermore, KHG26693 successfully blocked the migration of LPS-activated microglia, most likely by modulating the ERK pathway. Taken together, these results demonstrate that the anti-inflammatory and antioxidative actions of KHG26693 are mediated, at least in part, through the control of microglial activation.
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Affiliation(s)
- Eun-A Kim
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul 138-736, Republic of Korea
| | - A Reum Han
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul 138-736, Republic of Korea
| | - Jiyoung Choi
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul 138-736, Republic of Korea
| | - Jee-Yin Ahn
- Department of Molecular Cell Biology, Center for Molecular Medicine, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Suwon 440-746, Republic of Korea
| | - Soo Young Choi
- Department of Biomedical Science and Research Institute for Bioscience and Biotechnology, Hallym University, Chunchon 200-702, Republic of Korea
| | - Sung-Woo Cho
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul 138-736, Republic of Korea.
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Abstract
Mitogen-activated protein kinases (MAPKs) mediate a wide variety of cellular behaviors in response to extracellular stimuli. One of the main subgroups, the p38 MAP kinases, has been implicated in a wide range of complex biologic processes, such as cell proliferation, cell differentiation, cell death, cell migration, and invasion. Dysregulation of p38 MAPK levels in patients are associated with advanced stages and short survival in cancer patients (e.g., prostate, breast, bladder, liver, and lung cancer). p38 MAPK plays a dual role as a regulator of cell death, and it can either mediate cell survival or cell death depending not only on the type of stimulus but also in a cell type specific manner. In addition to modulating cell survival, an essential role of p38 MAPK in modulation of cell migration and invasion offers a distinct opportunity to target this pathway with respect to tumor metastasis. The specific function of p38 MAPK appears to depend not only on the cell type but also on the stimuli and/or the isoform that is activated. p38 MAPK signaling pathway is activated in response to diverse stimuli and mediates its function by components downstream of p38. Extrapolation of the knowledge gained from laboratory findings is essential to address the clinical significance of p38 MAPK signaling pathways. The goal of this review is to provide an overview on recent progress made in defining the functions of p38 MAPK pathways with respect to solid tumor biology and generate testable hypothesis with respect to the role of p38 MAPK as an attractive target for intervention of solid tumors.
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Affiliation(s)
- Hari K Koul
- Department of Biochemistry & Molecular Biology, LSU Health Sciences Center, Shreveport, LA, USA ; Feist-Weiller Cancer Center, Shreveport, LA, USA ; Veterans Administration Medical Center, Shreveport, LA, USA
| | - Mantu Pal
- Department of Biochemistry & Molecular Biology, LSU Health Sciences Center, Shreveport, LA, USA ; Veterans Administration Medical Center, Shreveport, LA, USA
| | - Sweaty Koul
- Feist-Weiller Cancer Center, Shreveport, LA, USA ; Department of Urology, LSU Health Sciences Center, Shreveport, LA, USA
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62
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Perry DM, Newcomb B, Adada M, Wu BX, Roddy P, Kitatani K, Siskind L, Obeid LM, Hannun YA. Defining a role for acid sphingomyelinase in the p38/interleukin-6 pathway. J Biol Chem 2014; 289:22401-12. [PMID: 24951586 DOI: 10.1074/jbc.m114.589648] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Acid sphingomyelinase (ASM) is one of the key enzymes involved in regulating the metabolism of the bioactive sphingolipid ceramide in the sphingolipid salvage pathway, yet defining signaling pathways by which ASM exerts its effects has proven difficult. Previous literature has implicated sphingolipids in the regulation of cytokines such as interleukin-6 (IL-6), but the specific sphingolipid pathways and mechanisms involved in inflammatory signaling need to be further elucidated. In this work, we sought to define the role of ASM in IL-6 production because our previous work showed that a parallel pathway of ceramide metabolism, acid β-glucosidase 1, negatively regulates IL-6. First, silencing ASM with siRNA abrogated IL-6 production in response to the tumor promoter, 4β-phorbol 12-myristate 13-acetate (PMA), in MCF-7 cells, in distinction to acid β-glucosidase 1 and acid ceramidase, suggesting specialization of the pathways. Moreover, treating cells with siRNA to ASM or with the indirect pharmacologic inhibitor desipramine resulted in significant inhibition of TNFα- and PMA-induced IL-6 production in MDA-MB-231 and HeLa cells. Knockdown of ASM was found to significantly inhibit PMA-dependent IL-6 induction at the mRNA level, probably ruling out mechanisms of translation or secretion of IL-6. Further, ASM knockdown or desipramine blunted p38 MAPK activation in response to TNFα, revealing a key role for ASM in activating p38, a signaling pathway known to regulate IL-6 induction. Last, knockdown of ASM dramatically blunted invasion of HeLa and MDA-MB-231 cells through Matrigel. Taken together, these results demonstrate that ASM plays a critical role in p38 signaling and IL-6 synthesis with implications for tumor pathobiology.
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Affiliation(s)
- David M Perry
- From the Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425
| | | | | | - Bill X Wu
- From the Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425
| | - Patrick Roddy
- From the Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425
| | - Kazuyuki Kitatani
- the Tohoku Medical Megabank Organization and Department of Obstetrics and Gynecology, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Leah Siskind
- the Department of Pharmacology and Toxicology, University of Louisville, Louisville, Kentucky 40202
| | - Lina M Obeid
- the Department of Medicine Stony Brook University, Stony Brook, New York 11794, and the Northport Veterans Affairs Hospital, Northport, New York 11768
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63
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Scott R, Panitch A. Decorin mimic regulates platelet-derived growth factor and interferon-γ stimulation of vascular smooth muscle cells. Biomacromolecules 2014; 15:2090-103. [PMID: 24806357 PMCID: PMC4052849 DOI: 10.1021/bm500224f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 04/15/2014] [Indexed: 01/24/2023]
Abstract
Following balloon injury, smooth muscle cells (SMCs) serve as targets for many of the pro-inflammatory and pro-fibrotic factors, including platelet-derived growth factor (PDGF) and interferon-γ (IFN-γ) released from activated inflammatory cells and platelets. Previously, our lab designed a mimic of the proteoglycan decorin, termed DS-SILY20, that suppressed vascular SMC proliferation, migration, and protein synthesis in vitro, and injured vessels treated with DS-SILY20 demonstrated reduced hyperplasia in vivo. Here we characterize the effects of DS-SILY20 on modulating PDGF and IFN-γ stimulation in both proliferative and quiescent human SMCs to further evaluate the potential impact of DS-SILY20-SMC interaction on restenosis. Nanomolar dissociation constants were observed between DS-SILY20 and both PDGF and IFN-γ. PDGF significantly increased migration, proliferation, and protein and cytokine expression, as well as increased ERK-1/2 and p38 MAPK phosphorylation in both quiescent and proliferative cultures. However, DS-SILY20 inhibited these increases, presumably through sequestration of the PDGF. Consistent with the complex responses seen with IFN-γ in SMC physiology in the literature, the response of SMC cultures to IFN-γ was variable and complex. However, where increased activity was seen with IFN-γ, DS-SILY20 attenuated this activity. Overall, the results suggest that DS-SILY20 would be an ideal alternative to traditional therapeutics used and may be an effective therapy for the prevention of intimal hyperplasia after balloon angioplasty.
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Affiliation(s)
- Rebecca
A. Scott
- Weldon
School of Biomedical
Engineering Purdue University, West Lafayette, Indiana 47907, United States
| | - Alyssa Panitch
- Weldon
School of Biomedical
Engineering Purdue University, West Lafayette, Indiana 47907, United States
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64
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Devi KSP, Behera B, Sahoo B, Maiti TK. Heteroglucan-dendrimer glycoconjugate: a modulated construct with augmented immune responses and signaling phenomena. Biochim Biophys Acta Gen Subj 2014; 1840:2794-805. [PMID: 24806609 DOI: 10.1016/j.bbagen.2014.04.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 03/15/2014] [Accepted: 04/29/2014] [Indexed: 11/19/2022]
Abstract
BACKGROUND Newer strategies for augmenting immune responses of pharmacologically active glucans may serve to improve the medicinal potential of these biomolecules. With this aim, the present work was focused on generating targeted high molecular size glucan particles with magnified immune response activity. METHODS Heteroglucans were conjugated with PAMAM dendrimers using a Schiff base reductive amination reaction to generate a polytethered molecule with multiple glucan motifs. The modulated construct was characterized by FTIR, TEM, (1)H NMR and dynamic light scattering (DLS) methods. Effects of conjugated glucans were examined in RAW 264.7 macrophage cells as well as in S-180 murine tumor models. RESULTS Dendrimer-conjugated glucans were found to exhibit a two-fold increase in immune stimulation in comparison to unconjugated glucans. This may be corroborated by the predominant enhancement in immunological functions such as nitric oxide production, ROS generation and immune directed tumor inhibition in murine models. Immune cell surface markers (CD4, CD8, CD19, MHC-II) and cytokine levels were also found to be highly up-regulated in the splenocytes of mice subjected to particulate glucan administration. Our study also demonstrated that conjugated glucan treatment to RAW 264.7 cells strongly enhanced the phosphorylation of two downstream signalling molecules of the mitogen activated protein kinase (MAPKs) family: p38 and MEK1/2 relative to single glucans thereby relating molecular mechanisms with enhanced immune stimulation. CONCLUSIONS AND GENERAL SIGNIFICANCE The results obtained thus support that particulate format of soluble heteroglucan will thereby improve its functionality and identify leads in therapeutic competence.
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Affiliation(s)
- K Sanjana P Devi
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Birendra Behera
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Banalata Sahoo
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Tapas K Maiti
- Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India.
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65
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Forsythin inhibits lipopolysaccharide-induced inflammation by suppressing JAK-STAT and p38 MAPK signalings and ROS production. Inflamm Res 2014; 63:597-608. [DOI: 10.1007/s00011-014-0731-7] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Revised: 02/20/2014] [Accepted: 03/17/2014] [Indexed: 10/25/2022] Open
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66
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Park SY, Seetharaman R, Ko MJ, Kim DY, Kim TH, Yoon MK, Kwak JH, Lee SJ, Bae YS, Choi YW. Ethyl linoleate from garlic attenuates lipopolysaccharide-induced pro-inflammatory cytokine production by inducing heme oxygenase-1 in RAW264.7 cells. Int Immunopharmacol 2014; 19:253-61. [DOI: 10.1016/j.intimp.2014.01.017] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 01/14/2014] [Accepted: 01/17/2014] [Indexed: 12/25/2022]
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67
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Haddad LE, Sirois MG. Angiopoietin-1 upregulates de novo expression of IL-1β and Il1-Ra, and the exclusive release of Il1-Ra from human neutrophils. PLoS One 2014; 9:e88980. [PMID: 24563688 PMCID: PMC3923077 DOI: 10.1371/journal.pone.0088980] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Accepted: 01/14/2014] [Indexed: 01/24/2023] Open
Abstract
The expression of the angiopoietin (Ang) receptor, Tie2, on both endothelial and inflammatory cells supports the idea that Ang signaling may play a fundamental role in initiating and maintaining the inflammatory response. We have previously shown that Ang1 and/or Ang2 alter the innate immune response by enhancing human neutrophil survival, chemotaxis and production of inflammatory cytokine interleukin-8 (IL-8) in vitro. Thus, we hypothesized that Ang1 and Ang2 could modulate other inflammatory signals in neutrophils, a possibility we explored through a gene-based assay looking at changes in the mRNA expression of 84 inflammatory cytokines and their receptors. We observed that Ang1 (10(-8) M), but not Ang2, increased mRNA expression of prominent pro-inflammatory cytokine IL-1β and its natural antagonist IL-1RA, by up to 32.6- and 10.0-fold respectively, compared to PBS-control. The effects of Ang1 extended to the proteins, as Ang1 increased intracellular levels of precursor and mature IL-1β, and extracellular levels of IL-1RA proteins, by up to 4.2-, 5.0- and 4.4-fold respectively, compared to PBS-control. Interestingly, Ang1 failed at inducing IL-1β protein release or at increasing intracellular IL-1RA, but the ratio of IL-1RA to mature IL-1β remained above 100-fold molar excess inside and outside the cells. The above-noted effects of Ang1 were mediated by MAP kinases, whereby inhibiting MEK1/2 lead to up to 70% effect reduction, whereas the blockade of p38MAPK activity doubled Ang1's effect. These findings suggest that Ang1 selectively alters the balance of neutrophil-derived inflammatory cytokines, favoring the blockade of IL-1 activity, a consideration for future therapies of inflammatory diseases.
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Affiliation(s)
- Lydia E. Haddad
- Research Center, Montreal Heart Institute, Montréal, Canada
- Department Of Pharmacology, Faculty of Medicine, Université De Montréal, Montréal, Canada
| | - Martin G. Sirois
- Research Center, Montreal Heart Institute, Montréal, Canada
- Department Of Pharmacology, Faculty of Medicine, Université De Montréal, Montréal, Canada
- * E-mail:
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68
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Lin CJ, Lien HM, Chang HY, Huang CL, Liu JJ, Chang YC, Chen CC, Lai CH. Biological evaluation of Phellinus linteus-fermented broths as anti-inflammatory agents. J Biosci Bioeng 2014; 118:88-93. [PMID: 24503424 DOI: 10.1016/j.jbiosc.2014.01.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 12/13/2013] [Accepted: 01/05/2014] [Indexed: 01/24/2023]
Abstract
Phellinus linteus and its constituent hispolon induce potent anti-inflammatory activity in macrophages. Efficient production of the effective constituent and the biological function of P. linteus in the regulation of innate sensing have rarely been investigated. The aim of this study was to efficiently manufacture P. linteus-fermented broth containing the effective constituent, hispolon, and evaluate its immunoregulatory functions in macrophages. Four distinct fermented broths (PL1-4) and the medium dialyzate (MD) were prepared to screen suitable culture conditions for the mycelial growth of P. linteus. The P. linteus-fermented broth exhibited a dose-responsive inhibition of lipopolysaccharide (LPS)-induced nitric oxide (NO) production by murine macrophages. In addition, the P. linteus-fermented broths suppressed macrophage LPS-mediated nuclear factor (NF)-κB activity and tumor necrosis factor (TNF)-α. Among the tested samples from P. linteus, PL4 contained vast amounts of hispolon and showed the greatest anti-inflammatory activity in both the RAW264.7 cells and murine primary peritoneal exudate macrophages (PEMs). This study demonstrates that the purification of the effective constituent from P. linteus-fermented broth may enable the production of a potent therapeutic agent for anti-inflammation in macrophages.
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Affiliation(s)
- Chun-Jung Lin
- Graduate Institute of Clinical Medical Science, China Medical University, 91 Hsuehshih Road, Taichung 40402, Taiwan
| | - Hsiu-Man Lien
- Department of Chemistry, Tunghai University, 1727, Section 4, Taiwan Boulevard, Taichung 40704, Taiwan
| | - Hsiao-Yun Chang
- Department of Biotechnology, Asia University, 500, Lioufeng Road, Taichung 41354, Taiwan
| | - Chao-Lu Huang
- Department of Life Sciences, National Chung Hsing University, 250 Kuokuang Road, Taichung 40227, Taiwan
| | - Jau-Jin Liu
- Department of Microbiology and Graduate Institute of Basic Medical Science, China Medical University, 91 Hsuehshih Road, Taichung 40402, Taiwan
| | - Yun-Chieh Chang
- Department of Optometry, Yuanpei University, 306, Yuanpei Street, Hsinchu 30015, Taiwan
| | - Chia-Chang Chen
- School of Management, Feng Chia University, 100, Wenhwa Road, Taichung 40724, Taiwan
| | - Chih-Ho Lai
- Graduate Institute of Clinical Medical Science, China Medical University, 91 Hsuehshih Road, Taichung 40402, Taiwan; Department of Microbiology and Graduate Institute of Basic Medical Science, China Medical University, 91 Hsuehshih Road, Taichung 40402, Taiwan.
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69
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Liu M, John CM, Jarvis GA. Induction of Endotoxin Tolerance by PathogenicNeisseriaIs Correlated with the Inflammatory Potential of Lipooligosaccharides and Regulated by MicroRNA-146a. THE JOURNAL OF IMMUNOLOGY 2014; 192:1768-77. [DOI: 10.4049/jimmunol.1301648] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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70
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Guijarro-Muñoz I, Compte M, Álvarez-Cienfuegos A, Álvarez-Vallina L, Sanz L. Lipopolysaccharide activates Toll-like receptor 4 (TLR4)-mediated NF-κB signaling pathway and proinflammatory response in human pericytes. J Biol Chem 2013; 289:2457-68. [PMID: 24307174 DOI: 10.1074/jbc.m113.521161] [Citation(s) in RCA: 209] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Pericytes and mesenchymal stem cells (MSCs) are ontogenically related, and in fact, no significant phenotypic differences could be observed by flow cytometry. Transcriptome analysis of human pericytes and MSCs revealed that 43 genes were up-regulated more than 10-fold in pericytes compared with MSCs. Identification of Toll-like receptor 4 (TLR4) as one of the most abundant RNA species in pericytes with respect to MSCs and confirmation of TLR4 expression on the cell surface led us to obtain a comprehensive overview of the expression program of lipopolysaccharide (LPS)-stimulated pericytes. Transcriptional profiling of LPS-treated cells revealed that 22 genes were up-regulated more than 5-fold. Of them, 10 genes encoded chemokines and cytokines (CXCL10, CCL20, IL8, CXCL1, IL6, CCL2, IL1B, CXCL2, IL1A, and CXCL6), and three genes encoded adhesion molecules (ICAM1, VCAM1, and SELE). LPS induced nuclear translocation of the transcription factor NF-κB in stimulated pericytes. Moreover, inhibition of NF-κB activation by SC-514 blocked LPS-induced up-regulation of a subset of chemokine genes, confirming the key role of NF-κB in LPS signaling in pericytes. At the protein level, we assessed the secretion of the proinflammatory cytokines and chemokines IL-6, IL-8, CXCL1, CXCL2, CXCL3, and CCL2 not only after LPS treatment but also in HMGB1-stimulated pericytes. Up-regulation of the adhesion molecules ICAM-1 and VCAM-1 resulted in an increased adhesion of peripheral blood leukocytes to an LPS-treated pericyte monolayer. The role of pericytes in the inflammatory context has been scarcely addressed; according to these results, pericytes should be considered as active players in the inflammatory cascade with potential physiopathological implications.
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Affiliation(s)
- Irene Guijarro-Muñoz
- From the Molecular Immunology Unit, Hospital Universitario Puerta de Hierro Majadahonda, 28222 Majadahonda, Madrid, Spain
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71
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Nookala AR, Shah A, Noel RJ, Kumar A. HIV-1 Tat-mediated induction of CCL5 in astrocytes involves NF-κB, AP-1, C/EBPα and C/EBPγ transcription factors and JAK, PI3K/Akt and p38 MAPK signaling pathways. PLoS One 2013; 8:e78855. [PMID: 24244375 PMCID: PMC3823997 DOI: 10.1371/journal.pone.0078855] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Accepted: 09/23/2013] [Indexed: 12/23/2022] Open
Abstract
The incidence of HIV-associated neurological disorders (HAND) has increased during recent years even though the highly active antiretroviral therapy (HAART) has significantly curtailed the virus replication and increased the life expectancy among HIV-1 infected individuals. These neurological deficits have been attributed to HIV proteins including HIV-1 Tat. HIV-1 Tat is known to up-regulate CCL5 expression in mouse astrocytes, but the mechanism of up-regulation is not known. The present study was undertaken with the objective of determining the mechanism(s) underlying HIV-1 Tat-mediated expression of CCL5 in astrocytes. SVGA astrocytes were transiently transfected with a plasmid encoding Tat, and expression of CCL5 was studied at the mRNA and protein levels using real time RT-PCR and multiplex cytokine bead array, respectively. HIV-1 Tat showed a time-dependent increase in the CCL5 expression with peak mRNA and protein levels, observed at 1 h and 48 h post-transfection, respectively. In order to explore the mechanism(s), pharmacological inhibitors and siRNA against different pathway(s) were used. Pre-treatment with SC514 (NF-κB inhibitor), LY294002 (PI3K inhibitor), AG490 (JAK2 inhibitor) and Janex-1 (JAK3 inhibitor) showed partial reduction of the Tat-mediated induction of CCL5 suggesting involvement of JAK, PI3K/Akt and NF-κB in CCL5 expression. These results were further confirmed by knockdown of the respective genes using siRNA. Furthermore, p38 MAPK was found to be involved since the knockdown of p38δ but not other isoforms showed partial reduction in CCL5 induction. This was further confirmed at transcriptional level that AP-1, C/EBPα and C/EBPγ were involved in CCL5 up-regulation.
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Affiliation(s)
- Anantha R. Nookala
- Division of Pharmacology and Toxicology, UMKC-School of Pharmacy, Kansas City, Missouri, United States of America
| | - Ankit Shah
- Division of Pharmacology and Toxicology, UMKC-School of Pharmacy, Kansas City, Missouri, United States of America
| | - Richard J. Noel
- Department of Biochemistry, Ponce School of Medicine and Health Sciences, Ponce, Puerto Rico, United States of America
| | - Anil Kumar
- Division of Pharmacology and Toxicology, UMKC-School of Pharmacy, Kansas City, Missouri, United States of America
- * E-mail:
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The p38 MAPK inhibitor JLU1124 inhibits the inflammatory response induced by lipopolysaccharide through the MAPK-NF-κB pathway in RAW264.7 macrophages. Int Immunopharmacol 2013; 17:785-92. [DOI: 10.1016/j.intimp.2013.09.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 08/14/2013] [Accepted: 09/04/2013] [Indexed: 11/21/2022]
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73
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Bersani I, Kunzmann S, Speer CP. Immunomodulatory properties of surfactant preparations. Expert Rev Anti Infect Ther 2013; 11:99-110. [PMID: 23428105 DOI: 10.1586/eri.12.156] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Surfactant replacement significantly decreased acute pulmonary morbidity and mortality among preterm neonates with respiratory distress syndrome. Besides improving lung function and oxygenation, surfactant is also a key modulator of pulmonary innate and acquired immunity regulating lung inflammatory processes. In this review, we describe the immunomodulatory features of surfactant preparations. Various surfactant preparations decrease the proinflammatory cytokine and chemokine release, the oxidative burst activity, and the nitric oxide production in lung inflammatory cells such as alveolar neutrophils, monocytes and macrophages; they also affect lymphocyte proliferative response and immunoglobulin production, as well as natural killer and lymphokine-activated killer cell activity. In addition, surfactant preparations are involved in airway remodeling, as they decrease lung fibroblast proliferation capacity and the release of mediators involved in remodeling. Moreover, they increase cell transepithelial resistance and VEGF synthesis in lung epithelial cells. A number of different signaling pathways and molecules are involved in these processes. Because the inhibition of local immune response may decrease lung injury, surfactant therapeutic efficacy may be related not only to its biophysical characteristics but, at least in part, to its anti-inflammatory features and its effects on remodeling processes. However, further studies are required to identify which surfactant preparation ensures the highest anti-inflammatory activity, thereby potentially decreasing the inflammatory process underlying respiratory distress syndrome. In perspective, detailed characterization of these anti-inflammatory effects could help to improve the next generation of surfactant preparations.
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Affiliation(s)
- Iliana Bersani
- University Children's Hospital, University of Würzburg, Germany
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Lachance C, Wojewodka G, Skinner TAA, Guilbault C, De Sanctis JB, Radzioch D. Fenretinide corrects the imbalance between omega-6 to omega-3 polyunsaturated fatty acids and inhibits macrophage inflammatory mediators via the ERK pathway. PLoS One 2013; 8:e74875. [PMID: 24069363 PMCID: PMC3771966 DOI: 10.1371/journal.pone.0074875] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Accepted: 08/09/2013] [Indexed: 12/24/2022] Open
Abstract
We previously identified Fragile X-related protein 1 (FXR1) as an RNA-binding protein involved in the post-transcriptional control of TNF and other cytokines in macrophages. Macrophages derived from FXR1-KO mice overexpress several inflammatory cytokines including TNF. Recently, we showed that fenretinide (4HPR) is able to inhibit several inflammatory cytokines in the lungs of cystic fibrosis mice, which also have abnormal immune responses. Therefore, we hypothesized that 4HPR might also be able to downregulate excessive inflammation even in macrophages with ablated FXR1. Indeed, our results demonstrate that 4HPR inhibited the excessive production of inflammatory mediators, including TNF, IL-6, CCL2 and CCL-5 in LPS-stimulated FXR1-KO macrophages, by selectively inhibiting phosphorylation of ERK1/2, which is naturally more phosphorylated in FXR1-KO cells. We also found that LPS stimulation of FXR1-KO macrophages led to significantly higher ratio of arachidonic acid/docosahexaenoic acid than observed in FXR1-WT macrophages. Interestingly, treatment with 4HPR was associated with the normalization of arachidonic acid/docosahexaenoic acid ratio in macrophages, which we found to impact phosphorylation of ERK1/2. Overall, this study shows for the first time that 4HPR modulates inflammatory cytokine expression in macrophages by correcting a phospholipid-bound fatty acid imbalance that impacts the phosphorylation of ERK1/2.
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Affiliation(s)
- Claude Lachance
- McGill University, Department of Medicine and Department of Human Genetics, McGill University Health Center Research Institute, Montreal, Quebec, Canada
| | - Gabriella Wojewodka
- McGill University, Department of Medicine and Department of Human Genetics, McGill University Health Center Research Institute, Montreal, Quebec, Canada
| | - Tom A. A. Skinner
- McGill University, Department of Medicine and Department of Human Genetics, McGill University Health Center Research Institute, Montreal, Quebec, Canada
| | - Claudine Guilbault
- McGill University, Department of Medicine and Department of Human Genetics, McGill University Health Center Research Institute, Montreal, Quebec, Canada
| | - Juan B. De Sanctis
- Central University of Venezuela, Institute of Immunology, Caracas, Venezuela
| | - Danuta Radzioch
- McGill University, Department of Medicine and Department of Human Genetics, McGill University Health Center Research Institute, Montreal, Quebec, Canada
- * E-mail:
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Li J, Yan HT, Che JX, Bai SR, Qiu QM, Ren L, Pan F, Sun XQ, Tian FZ, Li DX, Tang LJ. Effects of neurolytic celiac plexus block on liver regeneration in rats with partial hepatectomy. PLoS One 2013; 8:e73101. [PMID: 24039865 PMCID: PMC3764180 DOI: 10.1371/journal.pone.0073101] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 07/17/2013] [Indexed: 11/18/2022] Open
Abstract
Liver regeneration is the basic physiological process after partial hepatectomy (PH), and is important for the functional rehabilitation of the liver after acute hepatic injury. This study was designed to explore the effects of neurolytic celiac plexus block (NCPB) on liver regeneration after PH. We established a model of PH in rats, assessing hepatic blood flow, liver function, and serum CRP, TNF-α, IL-1β and IL-6 concentrations of the residuary liver after PH. Additionally, histopathological studies, immunohistochemistry, and western blotting were also performed. Our results indicated that NCPB treatment after PH improved liver regeneration and survival rates, increased hepatic blood flow, reduced hepatocyte damage, decreased the secretion and release of inflammatory cytokines, increased the expression of B cell lymphoma/leukemia-2 (Bcl-2), and decreased the expression of Bcl-2 associated X protein (Bax). Additionally, Western blotting revealed that the expression of NF-κB p65 and c-Jun were decreased in liver after NCPB. In conclusion, the results of our present study indicate that NCPB treatment has a favorable effect on liver regeneration after PH. We suggest that NCPB can be utilized as an effective therapeutic method to help the functional rehabilitation of the liver after acute hepatic injury or liver cancer surgery.
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Affiliation(s)
- Jun Li
- Department of Anesthesia, General Hospital of Chengdu Military Command Area, Chengdu, Sichuan Province, P. R. China
| | - Hong-Tao Yan
- General Surgery Center of PLA, General Hospital of Chengdu Military Command Area, Chengdu, Sichuan Province, P. R. China
| | - Jian-Xiang Che
- Department of Anesthesia, the 44 Hospital of PLA, Guiyang, Guizhou Province, P. R. China
| | - Shu-Rong Bai
- Department of Anesthesia, General Hospital of Chengdu Military Command Area, Chengdu, Sichuan Province, P. R. China
| | - Qing-Ming Qiu
- Department of Anesthesia, the 44 Hospital of PLA, Guiyang, Guizhou Province, P. R. China
| | - Ling Ren
- Department of Anesthesia, General Hospital of Chengdu Military Command Area, Chengdu, Sichuan Province, P. R. China
| | - Fan Pan
- Department of Anesthesia, General Hospital of Chengdu Military Command Area, Chengdu, Sichuan Province, P. R. China
| | - Xiao-Qin Sun
- Department of Anesthesia, General Hospital of Chengdu Military Command Area, Chengdu, Sichuan Province, P. R. China
| | - Fu-Zhou Tian
- General Surgery Center of PLA, General Hospital of Chengdu Military Command Area, Chengdu, Sichuan Province, P. R. China
| | - Dong-Xuan Li
- General Surgery Center of PLA, General Hospital of Chengdu Military Command Area, Chengdu, Sichuan Province, P. R. China
| | - Li-Jun Tang
- General Surgery Center of PLA, General Hospital of Chengdu Military Command Area, Chengdu, Sichuan Province, P. R. China
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Wu Q, Sun G, Yuan X, Soromou LW, Chen N, Xiong Y, Feng H. Tubeimoside-1 attenuates LPS-induced inflammation in RAW 264.7 macrophages and mouse models. Immunopharmacol Immunotoxicol 2013; 35:514-23. [DOI: 10.3109/08923973.2013.810643] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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77
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Monick MM, Baltrusaitis J, Powers LS, Borcherding JA, Caraballo JC, Mudunkotuwa I, Peate DW, Walters K, Thompson JM, Grassian VH, Gudmundsson G, Comellas AP. Effects of Eyjafjallajökull volcanic ash on innate immune system responses and bacterial growth in vitro. ENVIRONMENTAL HEALTH PERSPECTIVES 2013; 121:691-8. [PMID: 23478268 PMCID: PMC3672917 DOI: 10.1289/ehp.1206004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Accepted: 03/07/2013] [Indexed: 05/24/2023]
Abstract
BACKGROUND On 20 March 2010, the Icelandic volcano Eyjafjallajökull erupted for the first time in 190 years. Despite many epidemiological reports showing effects of volcanic ash on the respiratory system, there are limited data evaluating cellular mechanisms involved in the response to ash. Epidemiological studies have observed an increase in respiratory infections in subjects and populations exposed to volcanic eruptions. METHODS We physicochemically characterized volcanic ash, finding various sizes of particles, as well as the presence of several transition metals, including iron. We examined the effect of Eyjafjallajökull ash on primary rat alveolar epithelial cells and human airway epithelial cells (20-100 µg/cm(2)), primary rat and human alveolar macrophages (5-20 µg/cm(2)), and Pseudomonas aeruginosa (PAO1) growth (3 µg/104 bacteria). RESULTS Volcanic ash had minimal effect on alveolar and airway epithelial cell integrity. In alveolar macrophages, volcanic ash disrupted pathogen-killing and inflammatory responses. In in vitro bacterial growth models, volcanic ash increased bacterial replication and decreased bacterial killing by antimicrobial peptides. CONCLUSIONS These results provide potential biological plausibility for epidemiological data that show an association between air pollution exposure and the development of respiratory infections. These data suggest that volcanic ash exposure, while not seriously compromising lung cell function, may be able to impair innate immunity responses in exposed individuals.
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Affiliation(s)
- Martha M Monick
- Department of Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
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78
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Zhong WT, Jiang LX, Wei JY, Qiao AN, Wei MM, Soromou LW, Xie XX, Zhou X, Ci XX, Wang DC. Protective effect of esculentoside A on lipopolysaccharide-induced acute lung injury in mice. J Surg Res 2013; 185:364-72. [PMID: 23764313 DOI: 10.1016/j.jss.2013.05.018] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 04/25/2013] [Accepted: 05/03/2013] [Indexed: 12/19/2022]
Abstract
BACKGROUND Esculentoside A (EsA) is a saponin isolated from the Chinese herb Phytolacca esculenta. In our study, we sought to investigate the protective effects of EsA on lipopolysaccharide (LPS)-induced acute lung injury (ALI) in mice. MATERIALS AND METHODS To determine the effects of EsA on the reduction of histopathologic changes in mice with ALI, inflammatory cell count in bronchoalveolar lavage fluid (BALF) and lung wet-to-dry weight ratio were measured in LPS-challenged mice, and lung histopathologic changes observed via paraffin section were assessed. Next, cytokine production induced by LPS in BALF was measured by enzyme-linked immunosorbent assay. To further study the mechanism of EsA protective effects on ALI, IκBa, p38, and extracellular signal receptor-activated kinase pathways were investigated in lung tissue of mice with ALI. RESULTS In the present investigation, EsA showed marked effects by reducing inflammatory infiltration, thickening of the alveolar wall, and pulmonary congestion. Levels of tumor necrosis factor α and interleukin 6 elevated by LPS were significantly decreased in BALF in EsA-pretreated ALI model. Furthermore, EsA significantly suppressed phosphorylation of IκBa, p38, and extracellular signal receptor-activated kinase. CONCLUSIONS Taken together, our results suggest that EsA suppressed inflammatory responses in LPS-induced ALI through inhibition of the nuclear factor kappa B and mitogen activated protein kinase signaling pathways. EsA may be a promising potential preventive agent for ALI treatment.
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Affiliation(s)
- Wei-ting Zhong
- Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun, Jilin, PR China
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79
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Tateno N, Matsumoto N, Motowaki T, Suzuki K, Aratani Y. Myeloperoxidase deficiency induces MIP-2 production via ERK activation in zymosan-stimulated mouse neutrophils. Free Radic Res 2013; 47:376-85. [DOI: 10.3109/10715762.2013.778990] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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80
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Breznan D, Goegan P, Chauhan V, Karthikeyan S, Kumarathasan P, Cakmak S, Nadeau D, Brook JR, Vincent R. Respiratory burst in alveolar macrophages exposed to urban particles is not a predictor of cytotoxicity. Toxicol In Vitro 2013; 27:1287-97. [PMID: 23466443 DOI: 10.1016/j.tiv.2013.02.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 01/31/2013] [Accepted: 02/21/2013] [Indexed: 10/27/2022]
Abstract
We examined the utility of respiratory burst measurements in alveolar macrophages to assess adverse cellular changes following exposure to urban particles. Cells were obtained by bronchioalveolar lavage of Fisher 344 rats and exposed (0-100 μg/well) to urban particles (EHC-93, SRM-1648, SRM-1649, PM2.5), the soluble (EHC-93sol) and insoluble (EHC-93insol) fractions of EHC-93 (EHC-93tot), mineral particles (TiO(2), SiO(2)) and metal oxides (iron III oxide, iron II/III oxide, copper II oxide, nickel II oxide). The particle-induced respiratory burst was measured by chemiluminescence for 2h after the addition of particles. The cells were then stimulated with phorbol 12-myristate 13-acetate (PMA), yeast Zymosan fragments (Zymosan), or lipopolysaccharide plus interferon-gamma (LPS/IFN-γ) and the stimulant-induced respiratory burst was measured. Independently of the potential of particles to induce directly a respiratory burst, exposure to most particles attenuated the subsequent stimulant-induced burst. The notable exception was SiO(2), which produced a strong respiratory burst upon contact with the macrophages and enhanced the subsequent response to PMA or LPS/IFN-γ. Based on the degree of inhibition of the stimulant-dependent respiratory burst, particles were clustered into groups of high (SRM-1649, iron III oxide), intermediate (EHC-93tot, EHC-93insol, SRM-1648, VERP, iron II/III oxide, copper II oxide), and low (EHC-93sol, SiO(2), TiO2 and nickel II oxide) potency. Across these clusters, the potency of the particles to inhibit the stimulant-dependent respiratory burst showed poor correlation with cytotoxicity determined by XTT reduction assay.
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Affiliation(s)
- Dalibor Breznan
- Inhalation Toxicology Laboratory, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, ON, Canada K1A 0K9
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81
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Kloesch B, Becker T, Dietersdorfer E, Kiener H, Steiner G. Anti-inflammatory and apoptotic effects of the polyphenol curcumin on human fibroblast-like synoviocytes. Int Immunopharmacol 2013; 15:400-5. [DOI: 10.1016/j.intimp.2013.01.003] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Revised: 01/03/2013] [Accepted: 01/03/2013] [Indexed: 10/27/2022]
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82
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Kim S, Yamamoto K, Nakamura Y, Otoyo Y, Yamatodani A. A Possible Mechanism of Cisplatin-Induced Tumor Necrosis Factor (TNF)-α Production in Murine Macrophages. ACTA ACUST UNITED AC 2013. [DOI: 10.4236/pp.2013.42021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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83
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p-Cymene Modulates In Vitro and In Vivo Cytokine Production by Inhibiting MAPK and NF-κB Activation. Inflammation 2012. [DOI: 10.1007/s10753-012-9574-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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84
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Chang TH, Chen SR, Yu CY, Lin YS, Chen YS, Kubota T, Matsuoka M, Lin YL. Dengue virus serotype 2 blocks extracellular signal-regulated kinase and nuclear factor-κB activation to downregulate cytokine production. PLoS One 2012; 7:e41635. [PMID: 22927911 PMCID: PMC3425550 DOI: 10.1371/journal.pone.0041635] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Accepted: 06/22/2012] [Indexed: 12/02/2022] Open
Abstract
Background Dengue virus (DENV) infection is the most common mosquito-borne viral disease threatening human health around the world. Type I interferon (IFN) and cytokine production are crucial in the innate immune system. We previously reported that DENV serotype 2 (DENV-2) induced low levels of interferon regulatory factor 3 and NF-κB activation, thus leading to reduced production of IFN-β in the early phase of infection. Here, we determined whether DENV infection not only hampers type I IFN activation but also cytokine production triggered by Toll-like receptor (TLR) signaling. Methodology/Principal Findings We used quantitative RT-PCR and found that only low levels of IFN-β and inflammatory cytokines such as interleukin 10 (IL-10), IL-12 and tumor necrosis factor α (TNFα) mRNA were detected in DENV-2–infected bone-marrow–derived dendritic cells. Furthermore, DENV-2 infection repressed cytokine production triggered by TLR signaling. To elucidate the molecular mechanisms underlying this suppression event, we measured NF-κB activation by p65 nuclear translocation and luciferase reporter assay and found that NF-κB activation triggered by TLR ligands was blocked by DENV-2 infection. As well, extracellular signal-regulated kinase (ERK) activity was suppressed by DENV-2 infection. Conclusions/Significance To downregulate the host innate immunity, DENV-2 by itself is a weak inducer of type I IFN and cytokines, furthermore DENV-2 can also block the TLR-triggered ERK–NF-κB activation and cytokine production.
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Affiliation(s)
- Tsung-Hsien Chang
- Department of Medical Education and Research, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
- * E-mail: (THC); (YLL)
| | - Siang-Ru Chen
- Department of Medical Education and Research, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Chia-Yi Yu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - You-Sheng Lin
- Department of Medical Education and Research, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
- Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Yao-Shen Chen
- Section of Infectious Diseases, Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
- Section of Microbiology, Department of Pathology and Laboratory Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan
| | - Toru Kubota
- Department of Virology III, National Institute of Infectious Diseases, Tokyo, Japan
| | - Mayumi Matsuoka
- Department of Bacteriology II, National Institute of Infectious Diseases, Tokyo, Japan
| | - Yi-Ling Lin
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
- * E-mail: (THC); (YLL)
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85
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Wallet MA, Reist CM, Williams JC, Appelberg S, Guiulfo GL, Gardner B, Sleasman JW, Goodenow MM. The HIV-1 protease inhibitor nelfinavir activates PP2 and inhibits MAPK signaling in macrophages: a pathway to reduce inflammation. J Leukoc Biol 2012; 92:795-805. [PMID: 22786868 DOI: 10.1189/jlb.0911447] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
The HIV-1 PI NFV has off-target effects upon host enzymes, including inhibition of the 20S proteasome, resulting in activation of PP1. HIV-1-associated monocyte/macrophage activation, in part a result of systemically elevated levels of microbial products including LPS, is associated with risk of mortality, independent of viremia or CD4 T cell loss. This study tested the hypothesis that activation of protein phosphatases by NFV would reduce activation of monocytes/macrophages through dephosphorylation of signal transduction proteins. NFV uniquely blocked LPS-induced production by human monocyte-derived macrophages of the inflammatory cytokines TNF and IL-6, as well as sCD14. Although NFV failed to modulate NF-κB, NFV treatment reduced phosphorylation of AKT and MAPKs. Inhibition of PP2 with okadaic acid blocked the anti-inflammatory effect of NFV, whereas the PP1 inhibitor calyculin A failed to counter the anti-inflammatory effects of NFV. For in vivo studies, plasma sCD14 and LPS were monitored in a cohort of 31 pediatric HIV-1 patients for over 2 years of therapy. Therapy, including NFV, reduced sCD14 levels significantly compared with IDV or RTV, independent of ΔLPS levels, VL, CD4 T cell frequency, or age. The hypothesis was supported as NFV induced activation of PP2 in macrophages, resulting in disruption of inflammatory cell signaling pathways. In vivo evidence supports that NFV may offer beneficial effects independent of antiviral activity by reducing severity of chronic innate immune activation in HIV-1 infection.
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Affiliation(s)
- Mark A Wallet
- University of Florida, Department of Pathology, Immunology and Laboratory Medicine, Gainesville, FL, USA.
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86
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Cui Y, Wu J, Jung SC, Kim GO, Kyeong Ko R, Lee HJ, Yoo ES, Kang HK, Suk K, Eun SY. Neuroprotective effect of methyl lucidone against microglia-mediated neurotoxicity. Eur J Pharmacol 2012; 690:4-12. [PMID: 22683871 DOI: 10.1016/j.ejphar.2012.05.041] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Revised: 05/23/2012] [Accepted: 05/29/2012] [Indexed: 11/19/2022]
Abstract
Excessive microglial activation-mediated neurotoxicity has been implicated in playing a crucial role in the pathogenesis of stroke and neurodegenerative diseases. Therefore, much attention has been paid to therapeutic strategies aimed at suppressing neurotoxic microglial activation. The microglial regulatory mechanism of methyl lucidone, a cyclopentenedione isolated from the stem bark of Lindera erythrocarpa Makino, was investigated in the present study. Methyl lucidone treatment (0.1-10 μM) significantly inhibited lipopolysaccharide (LPS, 100 ng/ml, 24 h)-stimulated nitric oxide (NO) production in a dose-dependent manner in both primary cortical microglia and BV-2 cell line. Moreover, it strongly inhibited LPS-stimulated secretion of pro-inflammatory cytokines, such as interleukin 6 (IL-6) and tumor necrosis factor α (TNF-α). Methyl lucidone treatment markedly induced down-regulation of LPS-induced nuclear translocation of nuclear factor κB (NF-κB) through preventing the degradation of the inhibitory protein IκBα. In addition, phosphorylation of Akt and mitogen-activated protein kinases (MAPKs) such as extracellular signal-regulated kinase (ERK) and p38 kinases were also suppressed by methyl lucidone. The cell viabilities of HT-22 neurons were significantly attenuated by treatment of the conditioned media containing neurotoxic secretary molecules from LPS-stimulated microglia. However, methyl lucidone significantly blocked neuronal cell death induced by microglial conditioned media. These neuroprotective effects of methyl lucidone were also confirmed in a neuron-microglia co-culture system using EGFP-transfected B35 neuroblastoma cell line. Taken together, these results suggest that methyl lucidone may have a neuroprotective potential via inhibition of neurotoxic microglial activation implicated in neurodegeneration.
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Affiliation(s)
- Yanji Cui
- Department of Physiology, Jeju National University School of Medicine, 66 Jejudaehakno, Jeju-si, Jeju-do 690-756, Republic of Korea
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87
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Lee J, Lee SJ, Lim KT. CTB glycoprotein (75kDa) inhibits IgE releasing, TNF-α and IL-6 expressed by bisphenol A in vivo and in vitro. Food Chem Toxicol 2012; 50:2109-17. [DOI: 10.1016/j.fct.2012.03.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Revised: 03/08/2012] [Accepted: 03/08/2012] [Indexed: 01/09/2023]
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88
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Thomas CM, Hong T, van Pijkeren JP, Hemarajata P, Trinh DV, Hu W, Britton RA, Kalkum M, Versalovic J. Histamine derived from probiotic Lactobacillus reuteri suppresses TNF via modulation of PKA and ERK signaling. PLoS One 2012; 7:e31951. [PMID: 22384111 PMCID: PMC3285189 DOI: 10.1371/journal.pone.0031951] [Citation(s) in RCA: 303] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2011] [Accepted: 01/20/2012] [Indexed: 02/06/2023] Open
Abstract
Beneficial microbes and probiotic species, such as Lactobacillus reuteri, produce biologically active compounds that can modulate host mucosal immunity. Previously, immunomodulatory factors secreted by L. reuteri ATCC PTA 6475 were unknown. A combined metabolomics and bacterial genetics strategy was utilized to identify small compound(s) produced by L. reuteri that were TNF-inhibitory. Hydrophilic interaction liquid chromatography-high performance liquid chromatography (HILIC-HPLC) separation isolated TNF-inhibitory compounds, and HILIC-HPLC fraction composition was determined by NMR and mass spectrometry analyses. Histamine was identified and quantified in TNF-inhibitory HILIC-HPLC fractions. Histamine is produced from L-histidine via histidine decarboxylase by some fermentative bacteria including lactobacilli. Targeted mutagenesis of each gene present in the histidine decarboxylase gene cluster in L. reuteri 6475 demonstrated the involvement of histidine decarboxylase pyruvoyl type A (hdcA), histidine/histamine antiporter (hdcP), and hdcB in production of the TNF-inhibitory factor. The mechanism of TNF inhibition by L. reuteri-derived histamine was investigated using Toll-like receptor 2 (TLR2)-activated human monocytoid cells. Bacterial histamine suppressed TNF production via activation of the H2 receptor. Histamine from L. reuteri 6475 stimulated increased levels of cAMP, which inhibited downstream MEK/ERK MAPK signaling via protein kinase A (PKA) and resulted in suppression of TNF production by transcriptional regulation. In summary, a component of the gut microbiome, L. reuteri, is able to convert a dietary component, L-histidine, into an immunoregulatory signal, histamine, which suppresses pro-inflammatory TNF production. The identification of bacterial bioactive metabolites and their corresponding mechanisms of action with respect to immunomodulation may lead to improved anti-inflammatory strategies for chronic immune-mediated diseases.
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Affiliation(s)
- Carissa M. Thomas
- Interdepartmental Program in Cell and Molecular Biology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Teresa Hong
- Department of Immunology, Beckman Research Institute of the City of Hope, Duarte, California, United States of America
| | - Jan Peter van Pijkeren
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, Michigan, United States of America
| | - Peera Hemarajata
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Dan V. Trinh
- Department of Immunology, Beckman Research Institute of the City of Hope, Duarte, California, United States of America
| | - Weidong Hu
- Department of Immunology, Beckman Research Institute of the City of Hope, Duarte, California, United States of America
| | - Robert A. Britton
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, Michigan, United States of America
| | - Markus Kalkum
- Department of Immunology, Beckman Research Institute of the City of Hope, Duarte, California, United States of America
| | - James Versalovic
- Department of Pathology and Immunology, Baylor College of Medicine, Houston, Texas, United States of America
- Department of Pathology, Texas Children's Hospital, Houston, Texas, United States of America
- * E-mail:
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Inhibitory effects of ZSTK474, a phosphatidylinositol 3-kinase inhibitor, on adjuvant-induced arthritis in rats. Inflamm Res 2012; 61:551-62. [DOI: 10.1007/s00011-012-0444-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 01/11/2012] [Accepted: 01/25/2012] [Indexed: 10/14/2022] Open
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90
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High concentrations of hydrogen sulphide elevate the expression of a series of pro-inflammatory genes in fibroblast-like synoviocytes derived from rheumatoid and osteoarthritis patients. Immunol Lett 2012; 141:197-203. [DOI: 10.1016/j.imlet.2011.10.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Accepted: 10/01/2011] [Indexed: 01/24/2023]
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91
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Lu DY, Tang CH, Chang CH, Maa MC, Fang SH, Hsu YM, Lin YH, Lin CJ, Lee WC, Lin HJ, Lee CH, Lai CH. Helicobacter pylori attenuates lipopolysaccharide-induced nitric oxide production by murine macrophages. Innate Immun 2011; 18:406-17. [PMID: 21926162 DOI: 10.1177/1753425911413164] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Intragastric growth of Helicobacter pylori and non-Helicobacter microorganisms is thought to be associated with elevated levels of pro-inflammatory cytokines and the production of NO these effects can lead to chronic inflammation. Microorganisms can activate the expression of iNOS and the production of NO by macrophages through stimulation with bacterial LPS. Helicobacter pylori can evade these vigorous immune responses, but the underlying mechanism remains unknown. In this study, we used a murine model of macrophage infection to demonstrate that H. pylori inhibits LPS-induced expression of iNOS and production of NO by macrophages. Suppression of LPS-induced NO production by macrophages led to elevated survival of H. pylori in a trans-well system. This effect was abrogated in macrophages from iNOS(-/-) mice. Analysis of iNOS mRNA and protein levels revealed that H. pylori inhibits iNOS expression at both transcriptional and post-transcriptional levels, and that these effects occurred with live bacteria. Furthermore, the effect of H. pylori involved down-regulation of the mitogen-activated protein kinase pathway and the translocation of active NF-κB into the nucleus. Taken together, our results reveal a new mechanism by which H. pylori modulates the innate immune responses of the host and maintains a persistent infection within the stomach.
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Affiliation(s)
- Dah-Yuu Lu
- Graduate Institute of Neural and Cognitive Sciences, China Medical University, Taichung, Taiwan
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Medina EA, Morris IR, Berton MT. Phosphatidylinositol 3-kinase activation attenuates the TLR2-mediated macrophage proinflammatory cytokine response to Francisella tularensis live vaccine strain. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2010; 185:7562-72. [PMID: 21098227 DOI: 10.4049/jimmunol.0903790] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
An inadequate innate immune response appears to contribute to the virulence of Francisella tularensis following pulmonary infection. Studies in mice suggest that this poor response results from suppression of proinflammatory cytokine production early during infection, but the mechanisms involved are not understood. PI3K is known to regulate proinflammatory cytokine expression, but its exact role (positive versus negative) is controversial. We sought to clarify the role of PI3K in regulating proinflammatory signaling and cytokine production during infection with F. tularensis live vaccine strain (LVS). In this study, we demonstrate that the induction of TNF and IL-6 expression by LVS in mouse bone marrow-derived macrophages was markedly enhanced when PI3K activity was inhibited by either of the well-known chemical inhibitors, wortmannin or LY294002. The enhanced cytokine expression was accompanied by enhanced activation of p38 MAPK and ERK1/2, both of which were critical for LVS-induced expression of TNF and IL-6. LVS-induced MAPK activation and cytokine production were TLR2- and MyD88- dependent. PI3K/Akt activation was MyD88-dependent, but was surprisingly TLR2-independent. LVS infection also rapidly induced MAPK phosphatase-1 (MKP-1) expression; PI3K and TLR2 signaling were required. Peak levels of MKP-1 correlated closely with the decline in p38 MAPK and ERK1/2 phosphorylation. These data suggest that infection by LVS restrains the TLR2-triggered proinflammatory response via parallel activation of PI3K, leading to enhanced MKP-1 expression, accelerated deactivation of MAPKs, and suppression of proinflammatory cytokine production. This TLR2-independent inhibitory pathway may be an important mechanism by which Francisella suppresses the host's innate immune response.
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Affiliation(s)
- Edward A Medina
- Department of Microbiology and Immunology, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
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93
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Barrenschee M, Lex D, Uhlig S. Effects of the TLR2 agonists MALP-2 and Pam3Cys in isolated mouse lungs. PLoS One 2010; 5:e13889. [PMID: 21124967 PMCID: PMC2987752 DOI: 10.1371/journal.pone.0013889] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2009] [Accepted: 10/15/2010] [Indexed: 11/22/2022] Open
Abstract
Background Gram-positive and Gram-negative bacteria are main causes of pneumonia or acute lung injury. They are recognized by the innate immune system via toll-like receptor-2 (TLR2) or TLR4, respectively. Among all organs, the lungs have the highest expression of TLR2 receptors, but little is known about the pulmonary consequences of their activation. Here we studied the effects of the TLR2/6 agonist MALP-2, the TLR2/1 agonist Pam3Cys and the TLR4 agonist lipopolysaccharide (LPS) on pro-inflammatory responses in isolated lungs. Methodology/Principal Findings Isolated perfused mouse lungs were perfused for 60 min or 180 min with MALP-2 (25 ng/mL), Pam3Cys (160 ng/mL) or LPS (1 µg/mL). We studied mediator release by enzyme linked immunosorbent assay (ELISA), the activation of mitogen activated protein kinase (MAPK) and AKT/protein kinase B by immunoblotting, and gene induction by quantitative polymerase chain reaction. All agonists activated the MAPK ERK1/2 and p38, but neither JNK or AKT kinase. The TLR ligands upregulated the inflammation related genes Tnf, Il1β, Il6, Il10, Il12, Ifng, Cxcl2 (MIP-2α) and Ptgs2. MALP-2 was more potent than Pam3Cys in inducing Slpi, Cxcl10 (IP10) and Parg. Remarkable was the strong induction of Tnc by MALP2, which was not seen with Pam3Cys or LPS. The growth factor related genes Areg and Hbegf were not affected. In addition, all three TLR agonists stimulated the release of IL-6, TNF, CXCL2 and CXCL10 protein from the lungs. Conclusions/Significance TLR2 and TLR4 activation leads to similar reactions in the lungs regarding MAPK activation, gene induction and mediator release. Several genes studied here have not yet been appreciated as targets of TLR2-activation in the lungs before, i.e., Slpi, tenascin C, Parg and Traf1. In addition, the MALP-2 dependent induction of Tnc may indicate the existence of TLR2/6-specific pathways.
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Affiliation(s)
- Martina Barrenschee
- Institute of Pharmacology and Toxicology, University Hospital Aachen, RWTH Aachen University, Aachen, Germany
| | - Dennis Lex
- Institute of Pharmacology and Toxicology, University Hospital Aachen, RWTH Aachen University, Aachen, Germany
| | - Stefan Uhlig
- Institute of Pharmacology and Toxicology, University Hospital Aachen, RWTH Aachen University, Aachen, Germany
- * E-mail:
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94
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Israf DA, Tham CL, Syahida A, Lajis NH, Sulaiman MR, Mohamad AS, Zakaria ZA. Atrovirinone inhibits proinflammatory mediator synthesis through disruption of NF-kappaB nuclear translocation and MAPK phosphorylation in the murine monocytic macrophage RAW 264.7. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2010; 17:732-739. [PMID: 20378317 DOI: 10.1016/j.phymed.2010.02.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
In a previous communication we showed that atrovirinone, a 1,4-benzoquinone isolated from the roots of Garcinia atroviridis, was able to inhibit several major proinflammatory mediators of inflammation. In this report we show that atrovirinone inhibits NO and PGE(2) synthesis through inhibition of iNOS and COX-2 expression. We also show that atrovirinone inhibits the secretion of IL-1beta and IL-6 in a dose dependent fashion whereas the secretion of IL-10, the anti-inflammatory cytokine, was enhanced. Subsequently we determined that the inhibition of proinflammatory cytokine synthesis and inducible enzyme expression was due to a dose-dependent inhibition of phosphorylation of p38 and ERK1/2. We also showed that atrovirinone prevented phosphorylation of I-kappaBalpha, which resulted in a reduction of p65NF-kappaB nuclear translocation as demonstrated by expression analysis. We conclude that atrovirinone is a potential anti-inflammatory drug lead that targets both the MAPK and NF-kappaB pathway.
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Affiliation(s)
- D A Israf
- Department of Biomedical Science, Faculty of Medicine & Health Sciences, Universiti Putra Malaysia, 43400 Serdang, Malaysia.
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95
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Lin MC, Lin SB, Lee SC, Lin CC, Hui CF, Chen JY. Antimicrobial peptide of an anti-lipopolysaccharide factor modulates of the inflammatory response in RAW264.7 cells. Peptides 2010; 31:1262-72. [PMID: 20385189 DOI: 10.1016/j.peptides.2010.04.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2010] [Revised: 04/02/2010] [Accepted: 04/05/2010] [Indexed: 12/23/2022]
Abstract
In this study, to clarify the protective mechanism of a peptide from shrimp anti-lipopolysaccharide (LPS) factor (SALF) against endotoxin shock, we evaluated the effects of the SALF and LPS on the production and release of tumor necrosis factor (TNF)-alphain vitro using the RAW264.7 murine macrophage cell line. Stimulation by LPS induced the production of inflammatory cytokines, and the SALF was able to modulate TNF-alpha production in LPS-stimulated RAW264.7 cells. Microarray studies revealed a transcriptional profile which was assessed in the presence or absence of the SALF by a quantitative real-time polymerase chain reaction. Pretreatment with the SALF significantly downregulated the expression of nuclear factor (NF)-kappaB in the presence of LPS. In contrast, pretreatment with the SALF significantly elevated the expressions of Anp32a, CLU, and SLPI, which are considered to be immune-related genes in the presence of LPS. Inhibitor studies suggested that the SALF's modulation of LPS-induced TNF-alpha production involved a complex mechanism with mitogen-activated protein kinase kinase, calcium, and protein kinase C. The data from this study, which imply that the SALF can suppress TNF-alpha production, suggest a role for the SALF in the defense mechanism which can potentially be applied to mammals for endotoxin treatment.
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Affiliation(s)
- Ming-Ching Lin
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, 23-10 Dahuen Rd., Jiaushi, Ilan 262, Taiwan
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96
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Kim EA, Kim H, Ahn JY, Hahn HG, Kim KS, Kim TU, Cho SW. Suppression of lipopolysaccharide-induced microglial activation by a benzothiazole derivative. Mol Cells 2010; 30:51-7. [PMID: 20652495 DOI: 10.1007/s10059-010-0087-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2010] [Revised: 03/11/2010] [Accepted: 03/25/2010] [Indexed: 12/28/2022] Open
Abstract
We previously reported that KHG21834, a benzothiazole derivative, attenuates the beta-amyloid (Abeta)-induced degeneration of both cortical and mesencephalic neurons in vitro. Central nervous system inflammation mediated by activated microglia is a key event in the development of neurodegenerative disease. In this study, we show that KHG21834 suppresses inflammation-mediated cytokine upregulation. Specifically, KHG21834 induces significant reductions in the lipopolysaccharide-induced activation of microglia and production of proinflammatory mediators such as tumor necrosis factor-alpha, interlukin-1beta, nitric oxide, and inducible nitric oxide synthase. In addition, KHG21834 blocks the expression of mitogen-activated protein kinases, including ERK, p38 MAPK, JNK, and Akt. In vivo intracerebroventricular infusion of KHG21834 also leads to decreases the level of interleukin-1beta and tumor necrosis factor-alpha in brain. These results, in combination with our previous findings on Abeta-induced degeneration, support the potential therapeutic efficacy of KHG21834 for the treatment of neurodegenerative disorders via the targeting of key glial activation pathways.
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Affiliation(s)
- Eun-A Kim
- Department of Biochemistry and Molecular Biology, University of Ulsan College of Medicine, Seoul 138-736, Korea
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97
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Bourcier S, Sansonetti A, Durand L, Chomienne C, Robert-Lézénés J, Smadja-Joffe F. CD44-ligation induces, through ERK1/2 pathway, synthesis of cytokines TNF-alpha and IL-6 required for differentiation of THP-1 monoblastic leukemia cells. Leukemia 2010; 24:1372-5. [PMID: 20508620 DOI: 10.1038/leu.2010.100] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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98
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Rakkestad KE, Holme JA, Paulsen RE, Schwarze PE, Becher R. Mono(2-ethylhexyl) phthalate induces both pro- and anti-inflammatory responses in rat alveolar macrophages through crosstalk between p38, the lipoxygenase pathway and PPARalpha. Inhal Toxicol 2010; 22:140-50. [PMID: 19938896 DOI: 10.3109/08958370903019885] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Airway inflammation is important in asthma pathogenesis. Recent epidemiological data have indicated an association between asthma symptoms in children and exposure to di(2-ethylhexyl) phthalate (DEHP). Thus, we have studied inflammatory responses in primary rat alveolar macrophages (AMs) after exposure to mono(2-ethylhexyl) phthalate (MEHP), the major primary metabolite of DEHP. First, we show that MEHP induces a dose-dependent release of the pro-inflammatory tumour necrosis factor-alpha (TNF-alpha) in AMs, giving a maximal (5-fold) increase at 0.7 mM. This concentration also induced some cell death. MEHP also induced phosphorylation of MAPK p38, while the p38 inhibitor SB 202190 reduced MEHP-induced TNF-alpha, suggesting a p38-dependent cytokine production. Next, we elucidated possible effects of MEHP on the 5-lipoxygenase (5-LO) pathway and found that MEHP caused increased leukotriene (LTB(4)) release. Further, we found that the 5-LO inhibitor nordihydrogualaretic acid (NDGA) significantly reduced both MEHP-induced TNF-alpha release and MEHP-induced formation of reactive oxygen species (ROS), supporting an involvement of the 5-LO pathway in MEHP induced inflammatory reactions. Last, we found that MK-886, a known inhibitor of peroxisome proliferator-activated receptor alpha (PPARalpha), increased the MEHP-induced TNF-alpha response. This indicates that MEPH-PPARalpha binding mediates an anti-inflammatory signal.
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Affiliation(s)
- Kirsten E Rakkestad
- Department of Air Pollution and Noise, Division of Environmental Medicine, Norwegian Institute of Public Health, Oslo, Norway
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99
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DZIK JM, ZIELIŃSKI Z, CIEŚLA J, WAŁAJTYS-RODE E. Trichinella spiralisinfection enhances protein kinase C phosphorylation in guinea pig alveolar macrophages. Parasite Immunol 2010; 32:209-20. [DOI: 10.1111/j.1365-3024.2009.01180.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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100
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Lee SU, Choi YH, Kim YS, Min YK, Rhee M, Kim SH. Anti-resorptive saurolactam exhibits in vitro anti-inflammatory activity via ERK–NF-κB signaling pathway. Int Immunopharmacol 2010; 10:298-303. [DOI: 10.1016/j.intimp.2009.11.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2009] [Revised: 11/13/2009] [Accepted: 11/30/2009] [Indexed: 02/05/2023]
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