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Uddin MJ, Joe Y, Zheng M, Blackshear PJ, Ryter SW, Park JW, Chung HT. A functional link between heme oxygenase-1 and tristetraprolin in the anti-inflammatory effects of nicotine. Free Radic Biol Med 2013; 65:1331-9. [PMID: 24095726 PMCID: PMC4798239 DOI: 10.1016/j.freeradbiomed.2013.09.027] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 08/27/2013] [Accepted: 09/27/2013] [Indexed: 10/26/2022]
Abstract
Nicotine stimulates the cholinergic anti-inflammatory pathway and prevents excessive inflammation by inhibiting the release of inflammatory cytokines from macrophages. We have previously reported that heme oxygenase-1 (HO-1) and tristetraprolin (TTP) are induced by nicotine and mediate the anti-inflammatory function of nicotine in macrophages. However, it was not clear whether the two molecules are functionally linked. In this study, we sought to determine whether HO-1 associates with TTP to mediate the anti-inflammatory effects of nicotine. Inhibition of HO-1 activity or HO-1 expression attenuated the effects of nicotine on STAT3 activation, TTP induction, and TNF-α production in LPS-treated macrophages. Induction of HO-1 expression increased the level of TTP in the absence of nicotine. In an LPS-induced endotoxemia model, HO-1 deficiency blocked the effects of nicotine on the STAT3 phosphorylation, TTP induction, and LPS-induced TNF-α production in the liver. Downregulation of STAT3 by siRNA attenuated the effect of nicotine on TTP expression and TNF-α production but did not affect the nicotine-mediated induction of HO-1. In TTP knockout mice, nicotine treatment enhanced HO-1 expression and STAT3 activation but failed to inhibit LPS-induced TNF-α production. Our results suggest that HO-1 and TTP are functionally linked in mediating the anti-inflammatory effects of nicotine; HO-1 is necessary for the induction of TTP by nicotine. This novel nicotine-HO-1-TTP signaling pathway provides new possibilities for the treatment of inflammatory diseases.
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Affiliation(s)
- Md. Jamal Uddin
- School of Biological Sciences, University of Ulsan, Ulsan 680-749, Korea
| | - Yeonsoo Joe
- School of Biological Sciences, University of Ulsan, Ulsan 680-749, Korea
| | - Min Zheng
- School of Biological Sciences, University of Ulsan, Ulsan 680-749, Korea
- Department of Thoracic and Cardiovascular Surgery, Affiliated Hospital of YanBian University
| | - Perry J. Blackshear
- Laboratory of Signal Transduction, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
| | - Stefan W. Ryter
- Department of Pulmonary and Critical Care Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Jeong Woo Park
- School of Biological Sciences, University of Ulsan, Ulsan 680-749, Korea
| | - Hun Taeg Chung
- School of Biological Sciences, University of Ulsan, Ulsan 680-749, Korea
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Kim TH, Kim SJ, Lee SM. Stimulation of the α7 nicotinic acetylcholine receptor protects against sepsis by inhibiting Toll-like receptor via phosphoinositide 3-kinase activation. J Infect Dis 2013; 209:1668-77. [PMID: 24298024 DOI: 10.1093/infdis/jit669] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND The Toll-like receptor (TLR) plays an important role in the induction of the hyperinflammatory response and tissue injury in sepsis. The cholinergic antiinflammatory pathway serves as a link between the parasympathetic and innate immune systems. We examined the antiinflammatory effect of nicotine, a potent α7 nicotinic acetylcholine receptor (α7nAChR) agonist, with regard to TLR expression and signaling during sepsis. METHODS Polymicrobial sepsis was induced in mice by cecal ligation and puncture (CLP). The subjects received intraperitoneal nicotine (400 μg/kg) immediately after CLP for the biochemical study and 0, 24, 48, and 72 hours after CLP for the survival test. Intraperitoneal methyllycaconitine (MLA; 5 mg/kg), an α7nAChR antagonist, was administered 5 minutes prior to nicotine treatment. We evaluated the effects of nicotine using α7nAChR and phosphoinositide 3-kinase (PI3K) inhibitors in lipopolysaccharide-stimulated RAW264.7 cells. RESULTS Nicotine improved sepsis-induced mortality, attenuated organ failure, and suppressed inflammatory cytokines, which were abolished by MLA. Nicotine enhanced PI3K/Akt activation and reduced PU.1 activity and TLR4 expression. MLA and PI3K inhibitors blocked this effect of nicotine. CONCLUSIONS Our findings suggest that stimulation of the cholinergic antiinflammatory pathway by nicotine protects against septic injury and that this may be associated with inhibition of TLR4 expression via α7nAChR/PI3K signaling.
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Affiliation(s)
- Tae-Hoon Kim
- School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
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Parada E, Egea J, Buendia I, Negredo P, Cunha AC, Cardoso S, Soares MP, López MG. The microglial α7-acetylcholine nicotinic receptor is a key element in promoting neuroprotection by inducing heme oxygenase-1 via nuclear factor erythroid-2-related factor 2. Antioxid Redox Signal 2013; 19:1135-48. [PMID: 23311871 PMCID: PMC3785807 DOI: 10.1089/ars.2012.4671] [Citation(s) in RCA: 146] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
AIMS We asked whether the neuroprotective effect of cholinergic microglial stimulation during an ischemic event acts via a mechanism involving the activation of nuclear factor erythroid-2-related factor 2 (Nrf2) and/or the expression of its target cytoprotective gene, heme oxygenase-1 (HO-1). Specifically, the protective effect of the pharmacologic alpha-7 nicotinic acetylcholine receptor (α7 nAChR) agonist PNU282987 was analyzed in organotypic hippocampal cultures (OHCs) subjected to oxygen and glucose deprivation (OGD) in vitro as well as in photothrombotic stroke in vivo. RESULTS OHCs exposed to OGD followed by reoxygenation elicited cell death, measured by propidium iodide and 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide staining. Activation of α7 nAChR by PNU282987, after OGD, reduced cell death, reactive oxygen species production, and tumor necrosis factor release. This was associated with induction of HO-1 expression, an effect reversed by α-bungarotoxin and by tin-protoporphyrin IX. The protective effect of PNU282987 was lost in microglial-depleted OHCs as well as in OHCs from Nrf2-deficient-versus-wild-type mice, an effect associated with suppression of HO-1 expression in microglia. Administration of PNU282987 1 h after induction of photothrombotic stroke in vivo reduced the infarct size and improved motor skills in Hmox1(lox/lox) mice that express normal levels of HO-1, but not in LysM(Cre)Hmox1(Δ/Δ) in which HO-1 expression is inhibited in myeloid cells, including the microglia. INNOVATION This study suggests the participation of the microglial α7 nAChR in the brain cholinergic anti-inflammatory pathway. CONCLUSION Activation of the α7 nAChR/Nrf2/HO-1 axis in microglia regulates neuroinflammation and oxidative stress, affording neuroprotection under brain ischemic conditions.
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Affiliation(s)
- Esther Parada
- 1 Instituto Teófilo Hernando and Department of Pharmacology, School of Medicine, Universidad Autónoma de Madrid , Madrid, Spain
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Zhou MS, Chadipiralla K, Mendez AJ, Jaimes EA, Silverstein RL, Webster K, Raij L. Nicotine potentiates proatherogenic effects of oxLDL by stimulating and upregulating macrophage CD36 signaling. Am J Physiol Heart Circ Physiol 2013; 305:H563-74. [PMID: 23748423 DOI: 10.1152/ajpheart.00042.2013] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cigarette smoking is a major risk factor for atherosclerosis and cardiovascular disease. CD36 mediates oxidized LDL (oxLDL) uptake and contributes to macrophage foam cell formation. We investigated a role for the CD36 pathway in nicotine-induced activation of macrophages and foam cell formation in vitro and in vivo. Nicotine in the same plasma concentration range found in smokers increased the CD36(+)/CD14(+) cell population in human peripheral blood mononuclear cells, increased CD36 expression of human THP1 macrophages, and increased macrophage production of reactive oxygen species, PKCδ phosphorylation, and peroxisome proliferator-activated receptor-γ (PPARγ) expression. Nicotine-induced CD36 expression was suppressed by antioxidants and by specific PKCδ and PPARγ inhibitors, implicating mechanistic roles for these intermediates. Nicotine synergized with oxLDL to increase macrophage expression of CD36 and cytokines TNF-α, monocyte chemoattractant protein-1, IL-6, and CXCL9, all of which were prevented by CD36 small interfering (si)RNA. Incubation with oxLDL (50 μg/ml) for 72 h resulted in lipid deposition in macrophages and foam cell formation. Preincubation with nicotine further increased oxLDL-induced lipid accumulation and foam cell formation, which was also prevented by CD36 siRNA. Treatment of apoE-/- mice with nicotine markedly exacerbated inflammatory monocyte levels and atherosclerotic plaque accumulation, effects that were not seen in CD36-/- apoE-/- mice. Our results show that physiological levels of nicotine increase CD36 expression in macrophages, a pathway that may account at least in part for the known proinflammatory and proatherogenic properties of nicotine. These results identify such enhanced CD36 expression as a novel nicotine-mediated pathway that may constitute an independent risk factor for atherosclerosis in smokers. The results also suggest that exacerbated atherogenesis by this pathway may be an adverse side effect of extended use of high concentrations of nicotine independent of their mode of administration.
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Affiliation(s)
- Ming-Sheng Zhou
- Department of Physiology, Liaoning Medical University, Jinzhou, Peoples Republic of China
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Park J, Kang JW, Lee SM. Activation of the cholinergic anti-inflammatory pathway by nicotine attenuates hepatic ischemia/reperfusion injury via heme oxygenase-1 induction. Eur J Pharmacol 2013; 707:61-70. [DOI: 10.1016/j.ejphar.2013.03.026] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 03/06/2013] [Accepted: 03/07/2013] [Indexed: 12/18/2022]
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Seo ES, Oh BK, Pak JH, Yim SH, Gurunathan S, Kim YP, Lee KJ. Acteoside improves survival in cecal ligation and puncture-induced septic mice via blocking of high mobility group box 1 release. Mol Cells 2013; 35:348-54. [PMID: 23563799 PMCID: PMC3887884 DOI: 10.1007/s10059-013-0021-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Revised: 02/19/2013] [Accepted: 02/28/2013] [Indexed: 10/27/2022] Open
Abstract
Acteoside, an active phenylethanoid glycoside, has been used traditionally as an anti-inflammatory agent. The molecular mechanism by which acteoside reduces inflammation was investigated in lipopolysaccharide (LPS)-induced Raw264.7 cells and in a mouse model of cecal ligation and puncture (CLP)-induced sepsis. In vitro, acteoside inhibits high mobility group box 1 (HMGB1) release and iNOS/NO production and induces heme oxygenase-1 (HO-1) expression in a concentration-dependent manner, while HO-1 siRNA antagonizes the inhibition of HMGB1 and NO. The effect of acteoside is inhibited by the p38 mitogen-activated protein kinase (MAPK) inhibitor SB203580 and Nfr2 siRNA, indicating that acteoside induces HO-1 via p38 MAPK and NF-E2-related factor 2 (Nrf2). In vivo, acteoside increases survival and decreases serum and lung HMGB1 levels in CLP-induced sepsis. Overall, these results that acteoside reduces HMGB1 release and may be beneficial for the treatment of sepsis.
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Affiliation(s)
- Eun Sun Seo
- Department of Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736,
Korea
- Department of Optometry, Dong Shin University, Naju 520-714,
Korea
| | - Bo Kang Oh
- Department of Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736,
Korea
| | - Jhang Ho Pak
- Department of Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736,
Korea
| | - Soon-Ho Yim
- Department of Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736,
Korea
| | | | - Young-Pil Kim
- Department of Life Science, Hanyang University, Seoul 133-791,
Korea
| | - Kyung Jin Lee
- Department of Medicine, University of Ulsan College of Medicine, Asan Medical Center, Seoul 138-736,
Korea
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Role of nicotine on cognitive and behavioral deficits in sepsis-surviving rats. Brain Res 2013; 1507:74-82. [DOI: 10.1016/j.brainres.2013.02.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2012] [Revised: 02/19/2013] [Accepted: 02/20/2013] [Indexed: 12/11/2022]
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Cui WY, Zhao S, Polanowska-Grabowska R, Wang J, Wei J, Dash B, Chang SL, Saucerman JJ, Gu J, Li MD. Identification and characterization of poly(I:C)-induced molecular responses attenuated by nicotine in mouse macrophages. Mol Pharmacol 2012; 83:61-72. [PMID: 23028093 DOI: 10.1124/mol.112.081497] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
To further our understanding of the effects of nicotine on the molecular responses of macrophages during virus or virus-like infections, poly(I:C)-stimulated macrophage-like RAW264.2 cells or mouse primary peritoneal macrophages were challenged with nicotine; and their molecular responses were evaluated using a qRT-PCR array, antibody array, ELISA, Western blotting, and Ca(2+) imaging. Of 51 genes expressed in the Toll-like receptor (TLR) and RIG-I-like receptor (RLR) pathways, mRNA expression of 15 genes in RAW264.7 cells was attenuated by nicotine, of which mRNA expression of IL-6, TNF-α, and IL-1β was confirmed to be attenuated in peritoneal macrophages. Concurrently, nicotine treatment attenuated the release of IL-6 and TNF-α from poly(I:C)-stimulated macrophages. However, when poly(I:C)-stimulated macrophages were challenged with nicotine plus α-bungarotoxin (α-BTX), secretion of IL-6 and TNF-α was found to be in a level seen with poly(I:C) stimulation only, indicating that α7-nAChR, a highly Ca(2+) permeable ion channel sensitive to blockade by α-BTX, is involved in this process. Furthermore, results from an antibody array indicated that nicotine treatment attenuated the phosphorylation of 82 sites, including Thr286 on CaMKIIα, from poly(I:C)-stimulated RAW264.7 cells, of which 28 are expressed in the downstream cascade of Ca(2+) signaling. Coincidentally, poly(I:C)-stimulated macrophages showed attenuated expression of phosphorylated CaMKIIα when pretreated with nicotine. In addition, nicotine attenuated intracellular Ca(2+) signal from poly(I:C)-stimulated RAW264.7 cells. Collectively, these results indicate that poly(I:C)-induced molecular responses of macrophages could be significantly attenuated by nicotine.
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Affiliation(s)
- Wen-Yan Cui
- Department of Psychiatry and Neurobehavioral Sciences University of Virginia 1670 Discovery Drive, Suite 110, Charlottesville, VA 22911, USA
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Jang HJ, Kim YM, Tsoyi K, Park EJ, Lee YS, Kim HJ, Lee JH, Joe Y, Chung HT, Chang KC. Ethyl pyruvate induces heme oxygenase-1 through p38 mitogen-activated protein kinase activation by depletion of glutathione in RAW 264.7 cells and improves survival in septic animals. Antioxid Redox Signal 2012; 17:878-89. [PMID: 22369644 PMCID: PMC3392619 DOI: 10.1089/ars.2011.3994] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
AIMS We investigated the molecular mechanism by which ethyl pyruvate (EP) induces heme oxygenase-1 (HO-1) in RAW 264.7 cells and its effect on survival rate in cecal ligation and puncture (CLP)-induced wild-type (WT) and HO-1 knockout (HO-1(-/-)) septic mice. RESULTS EP induced HO-1 in a dose- and time-dependent manner, which was mediated through p38 mitogen-activated protein kinase (MAPK) and NF-E2-related factor 2 (Nrf2) signaling cascade in RAW 264.7 cells. EP significantly inhibited the lipopolysaccharide (LPS)-stimulated inducible nitric oxide synthase (iNOS) expression and high-mobility group box 1 (HMGB1) release in RAW 264.7 cells. The inhibitory effect of EP on LPS-stimulated iNOS expression and HMGB1 release was reversed by transfection with siHO-1RNA in RAW 264.7 cells, but EP failed to reduce them in HO-1(-/-) peritoneal macrophages treated with LPS. Moreover, treatment of cells with glutathione ethyl ester (GSH-Et), SB203580 (p38 MAPK inhibitor), siHO-1, or p38-siRNA transfection inhibited anti-inflammatory effect of EP. Interestingly, both HO-1 induction and phosphorylation of p38 by EP were reversed by GSH-Et, and antioxidant redox element-luciferase activity by EP was reversed by SB203580 in LPS-activated cells. EP increased survival and decreased serum HMGB1 in CLP-WT mice, whereas it did not increase survival or decrease circulating HMGB1 in HO-1(-/-) CLP-mice. INNOVATION AND CONCLUSION Our work provides new insights into the understanding the molecular mechanism by showing that EP induces HO-1 through a p38 MAPK- and NRF2-dependent pathway by decreasing GSH cellular levels. We conclude that EP inhibits proinflammatory response to LPS in macrophages and increases survival in CLP-induced septic mice by upregulation of HO-1 level, in which p38 MAPK and Nrf2 play an important role.
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Affiliation(s)
- Hwa Jin Jang
- Department of Pharmacology, School of Medicine, Institute of Health Sciences, Gyeongsang National University, Jinju, Korea
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Yoon CH, Park HJ, Cho YW, Kim EJ, Lee JD, Kang KR, Han J, Kang D. Cigarette Smoke Extract-induced Reduction in Migration and Contraction in Normal Human Bronchial Smooth Muscle Cells. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2011; 15:397-403. [PMID: 22359478 PMCID: PMC3282228 DOI: 10.4196/kjpp.2011.15.6.397] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Revised: 11/21/2011] [Accepted: 12/01/2011] [Indexed: 11/18/2022]
Abstract
The proliferation, migration, cytokine release, and contraction of airway smooth muscle cells are key events in the airway remodeling process that occur in lung disease such as asthma, chronic obstruction pulmonary disease, and cancer. These events can be modulated by a number of factors, including cigarette smoke extract (CSE). CSE-induced alterations in the viability, migration, and contractile abilities of normal human airway cells remain unclear. This study investigated the effect of CSE on cell viability, migration, tumor necrosis factor (TNF)-α secretion, and contraction in normal human bronchial smooth muscle cells (HBSMCs). Treatment of HBSMCs with 10% CSE induced cell death, and the death was accompanied by the generation of reactive oxygen species (ROS). CSE-induced cell death was reduced by N-acetyl-l-cysteine (NAC), an ROS scavenger. In addition, CSE reduced the migration ability of HBSMCs by 75%. The combination of NAC with CSE blocked the CSE-induced reduction of cell migration. However, CSE had no effect on TNF-α secretion and NF-κB activation. CSE induced an increase in intracellular Ca2+ concentration in 64% of HBSMCs. CSE reduced the contractile ability of HBSMCs, and the ability was enhanced by NAC treatment. These results demonstrate that CSE treatment induces cell death and reduces migration and contraction by increasing ROS generation in normal HBSMCs. These results suggest that CSE may induce airway change through cell death and reduction in migration and contraction of normal HBSMCs.
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Affiliation(s)
- Chul Ho Yoon
- Department of Rehabilitation Medicine, Gyeongsang National University School of Medicine, Jinju 660-751, Korea
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61
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Tsoyi K, Jang HJ, Lee YS, Kim YM, Kim HJ, Seo HG, Lee JH, Kwak JH, Lee DU, Chang KC. (+)-Nootkatone and (+)-valencene from rhizomes of Cyperus rotundus increase survival rates in septic mice due to heme oxygenase-1 induction. JOURNAL OF ETHNOPHARMACOLOGY 2011; 137:1311-1317. [PMID: 21843620 DOI: 10.1016/j.jep.2011.07.062] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Revised: 07/26/2011] [Accepted: 07/29/2011] [Indexed: 05/31/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The rhizomes of Cyperus rotundus have been used as traditional folk medicine for the treatment of inflammatory diseases. However, the mechanism by which extract of rhizomes of Cyperus rotundus (ECR) elicits anti-inflammation has not been extensively investigated so far. The aim of the present study was to test whether heme oxygenase (HO)-1 induction is involved in the anti-inflammatory action of ECR. MATERIALS AND METHODS Induction of HO-1 and inhibition of inducible nitric oxide synthase (iNOS)/NO production by ECR and its 12 constituents (3 monoterpenes, 5 sesquiterpenes, and 4 aromatic compounds) were investigated using RAW264.7 cells in vitro. In addition, anti-inflammatory action of ECR and its two active ingredients (nookkatone, valencene) were confirmed in sepsis animal model in vivo. RESULTS ECR increased HO-1 expression in a concentration-dependent manner, which was correlated with significant inhibition of iNOS/NO production in LPS-activated RAW264.7 cells. Among 12 compounds isolated from ECR, mostly sesquiterpenes induced stronger HO-1 expression than monoterpenes in macrophage cells. Nootkatone and valencene (sesquiterpenes) significantly inhibited iNOS expression and NO production in LPS-simulated RAW264.7 cells. Inhibition of iNOS expression by nootkatone, valencene, and ECR were significantly reduced in siHO-1 RNA transfected cells. Furthermore, all three showed marked inhibition of high mobility group box-1 (HMGB1) in LPS-activated macrophages and increased survival rates in cecal ligation and puncture (CLP)-induced sepsis in mice. CONCLUSIONS Taken together, we concluded that possible anti-inflammatory mechanism of ECR is, at least, due to HO-1 induction, in which sesquiterpenes such as nootkatone and valencene play a crucial role.
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Affiliation(s)
- Konstantin Tsoyi
- Department of Pharmacology, School of Medicine, Institute of Health Sciences, Gyeongsang National University, Jinju 660-290, Republic of Korea
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Jun MS, Kim HS, Kim YM, Kim HJ, Park EJ, Lee JH, Lee KR, Kim YS, Chang KC. Ethanol Extract of Prunella vulgaris var. lilacina Inhibits HMGB1 Release by Induction of Heme Oxygenase-1 in LPS-activated RAW 264.7 Cells and CLP-induced Septic Mice. Phytother Res 2011; 26:605-12. [DOI: 10.1002/ptr.3613] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 06/16/2011] [Accepted: 06/16/2011] [Indexed: 01/10/2023]
Affiliation(s)
- Min Soo Jun
- Department of Pharmacology; School of Medicine, and Institute of Health Sciences; Gyeongsang National University; Jinju; 660-751; Republic of Korea
| | - Hee Sook Kim
- Department of Pharmacology; School of Medicine, and Institute of Health Sciences; Gyeongsang National University; Jinju; 660-751; Republic of Korea
| | - Young Min Kim
- Department of Pharmacology; School of Medicine, and Institute of Health Sciences; Gyeongsang National University; Jinju; 660-751; Republic of Korea
| | - Hye Jung Kim
- Department of Pharmacology; School of Medicine, and Institute of Health Sciences; Gyeongsang National University; Jinju; 660-751; Republic of Korea
| | - Eun Jung Park
- Department of Pharmacology; School of Medicine, and Institute of Health Sciences; Gyeongsang National University; Jinju; 660-751; Republic of Korea
| | - Jae Heun Lee
- Department of Pharmacology; School of Medicine, and Institute of Health Sciences; Gyeongsang National University; Jinju; 660-751; Republic of Korea
| | - Kang Ro Lee
- Natural Product Laboratory; School of Pharmacy; Sungkyunkwan University; Suwon; Republic of Korea
| | - Yeong Shik Kim
- Natural Product Research Institute, School of Pharmacy; Seoul National University; Seoul; Republic of Korea
| | - Ki Churl Chang
- Department of Pharmacology; School of Medicine, and Institute of Health Sciences; Gyeongsang National University; Jinju; 660-751; Republic of Korea
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Ha YM, Ham SA, Kim YM, Lee YS, Kim HJ, Seo HG, Lee JH, Park MK, Chang KC. β₁-adrenergic receptor-mediated HO-1 induction, via PI3K and p38 MAPK, by isoproterenol in RAW 264.7 cells leads to inhibition of HMGB1 release in LPS-activated RAW 264.7 cells and increases in survival rate of CLP-induced septic mice. Biochem Pharmacol 2011; 82:769-77. [PMID: 21763292 DOI: 10.1016/j.bcp.2011.06.041] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2011] [Revised: 06/27/2011] [Accepted: 06/28/2011] [Indexed: 01/17/2023]
Abstract
High mobility group box (HMGB)-1 plays an important role in sepsis-associated death in experimental studies. Heme oxygenase-1 (HO-1) inducers were reported to reduce HMGB1 release in experimental sepsis. Previously, we reported on the importance of the β₁-adrenergic receptor and protein kinase A pathway in the regulation of HO-1 expression by isoproterenol (ISO) in RAW 264.7 cells. We investigated whether ISO reduces HMGB1 release in LPS-activated RAW 264.7 cells and improves survival rate in septic mice due to HO-1 induction. ISO concentration-dependently increased HO-1 via Nrf-2 translocation and inhibited release of HMGB1 through the β₁-adrenergic receptor (β₁-AR) in LPS-activated RAW 264.7 cells. This conclusion was supported by the finding that dobutamine but not salbutamol increased HO-1 expression in both RAW 264.7 cells. ISO failed to inhibit HMGB1 release when HO-1 expression was suppressed by ZnPPIX, an HO-1 inhibitor in RAW 264.7 cells. ISO significantly inhibited phosphorylation of IκB-α and NF-κB-driven luciferase activity in LPS-activated RAW 264.7 cells. In addition, LY294002, a PI3K inhibitor, and SB203580, a p38 MAPK inhibitor, significantly inhibited not only HO-1 induction but also HMGB1 release by ISO. Importantly, ISO increased HO-1 protein expression in heart and lung tissues, reduced HMGB1 in plasma and increased survival rate in CLP-treated septic mice, which was significantly reversed by co-treatment with ZnPPIX. Taken together, we conclude that inhibition of HMGB1 release during sepsis via β₁-AR-mediated HO-1 induction is a novel mechanism for the beneficial effects of ISO in the treatment of sepsis.
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Affiliation(s)
- Yu Mi Ha
- Department of Pharmacology School of Medicine, and Institute of Health Sciences, Gyeongsang National University, Jinju 660-290, Republic of Korea
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