51
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Jeong SI, Lee SE, Yang H, Jin YH, Park CS, Park YS. Toxicologic evaluation of bacterial synthesized cellulose in endothelial cells and animals. Mol Cell Toxicol 2010. [DOI: 10.1007/s13273-010-0049-7] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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52
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Lee SE, Lee SH, Ryu DS, Park CS, Park KS, Park YS. Differentially-expressed genes related to atherosclerosis in acrolein-stimulated human umbilical vein endothelial cells. BIOCHIP JOURNAL 2010. [DOI: 10.1007/s13206-010-4402-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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53
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Chen H, Zhou L, Lin CY, Beattie MC, Liu J, Zirkin BR. Effect of glutathione redox state on Leydig cell susceptibility to acute oxidative stress. Mol Cell Endocrinol 2010; 323:147-54. [PMID: 20206230 PMCID: PMC2875365 DOI: 10.1016/j.mce.2010.02.034] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2009] [Revised: 02/24/2010] [Accepted: 02/24/2010] [Indexed: 12/16/2022]
Abstract
The free radical, or oxidative stress, theory posits that imbalance in cells between prooxidants and antioxidants results in an altered redox state and, over time, an accumulation of oxidative damage. We hypothesized herein that cells with an increasingly prooxidant intracellular environment also might be particularly susceptible to acute oxidative stress. To test this hypothesis, MA-10 cells were used as a model because of their well-defined, measurable function, namely progesterone production. We first experimentally altered the redox environment of the cells by their incubation with buthionine sulfoximine (BSO) or diethyl maleate (DEM) so as to deplete glutathione (GSH), and then exposed the GSH-depleted cells acutely to the prooxidant tert-butyl hydroperoxide (t-BuOOH). Neither BSO nor DEM by themselves affected progesterone production. However, when the GSH-depleted cells subsequently were exposed acutely to t-BuOOH, intracellular reactive oxygen species concentration was significantly increased, and this was accompanied by significant reductions in progesterone production. In striking contrast, treatment of control cells with t-BuOOH had no effect. Depletion of GSH and subsequent treatment of the cells with t-BuOOH-induced the phosphorylation of each of ERK1/2, JNK and p38, members of the MAPK family. Inhibition of p38 phosphorylation largely prevented the t-BuOOH-induced down-regulation of progesterone production in GSH-depleted cells. These results suggest that, as hypothesized, alteration of the intracellular GSH redox environment results in the increased sensitivity of MA-10 cells to oxidative stress, and that this is mediated by activation of one or more redox-sensitive MAPK members.
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Affiliation(s)
- Haolin Chen
- Division of Reproductive Biology, Department of Biochemistry and Molecular Biology, Johns Hopkins Bloomberg School of Public Health, 615 North Wolfe Street, Baltimore, MD 21205, USA.
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Chang MY, Ho FM, Wang JS, Kang HC, Chang Y, Ye ZX, Lin WW. AICAR induces cyclooxygenase-2 expression through AMP-activated protein kinase-transforming growth factor-beta-activated kinase 1-p38 mitogen-activated protein kinase signaling pathway. Biochem Pharmacol 2010; 80:1210-20. [PMID: 20615388 DOI: 10.1016/j.bcp.2010.06.049] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2010] [Revised: 06/27/2010] [Accepted: 06/28/2010] [Indexed: 01/13/2023]
Abstract
AMP-activated protein kinase (AMPK), a critical signaling molecule for regulating energy homeostasis, might bi-directionally regulate inflammation, and its action mechanism leading to inflammation is not fully understood. We utilized 5-aminoimidazole-4-carboxamide riboside (AICAR) as a pharmacological activator of AMPK to unveil the effects of and signaling cascades mediated by AMPK on cyclooxygenase (COX)-2 gene expression in rat aortic vascular smooth muscle cells (VSMCs), murine macrophage cell line (J774), and human umbilical vein endothelial cells (HUVECs). Biochemical approaches were further conducted to elucidate interactions among signaling molecules. We found that AICAR could induce COX-2 protein expression in the cell types tested. This event was mediated by COX-2 gene transcription, and abrogated by compound C and 5'-iodotubercidin, suggesting the essential role of AMPK in COX-2 induction. Pharmacological and biochemical studies indicated that p38 mitogen-activated protein kinase (MAPK) activation is the common downstream signal of AMPK in COX-2 expression in all three cell types. Furthermore, we also found that TAK1 is associated with AMPKalpha2, and this binding requires an interaction between the kinase domains of both molecules. Notably data of TAK1 phosphorylation indicate that the activating state is enhanced upon AMPK activation in vivo and in vitro. Our data for the first time prove a pivotal role of TAK1 in the AMPK signaling axis. Such interaction gives AMPK an additional pathway for regulating cellular functions. Via a downstream p38 MAPK signaling cascade, AMPK-dependent TAK1 activation leads to the expression of the inflammatory COX-2 gene in various cell types.
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Affiliation(s)
- Mei-Ying Chang
- Department of Pharmacology, College of Medicine, National Taiwan University, Taipei, Taiwan.
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55
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Gao F, Brant KA, Ward RM, Cattley RT, Barchowsky A, Fabisiak JP. Multiple protein kinase pathways mediate amplified IL-6 release by human lung fibroblasts co-exposed to nickel and TLR-2 agonist, MALP-2. Toxicol Appl Pharmacol 2010; 247:146-57. [PMID: 20600219 DOI: 10.1016/j.taap.2010.06.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2010] [Revised: 06/03/2010] [Accepted: 06/10/2010] [Indexed: 12/16/2022]
Abstract
Microbial stimuli and atmospheric particulate matter (PM) interact to amplify the release of inflammatory and immune-modulating cytokines. The basis of this interaction, however, is not known. Cultured human lung fibroblasts (HLF) were used to determine whether various protein kinase pathways were involved in the release of IL-6 following combined exposure to the PM-derived metal, Ni, and M. fermentans-derived macrophage-activating lipopeptide 2 (MALP-2), a toll-like receptor 2 agonist. Synergistic release of IL-6 by MALP-2 and NiSO4 was obvious after 8h of co-stimulation and correlated with a late phase accumulation of IL-6 mRNA. Ni and MALP-2, alone or together, all led to rapid and transient phosphorylations of ERK(1/2) and JNK/SAPK of similar magnitude. p38 phosphorylation, however, was observed only after prolonged treatment of cells with both stimuli together. A constitutive level of PI3K-dependent Akt phosphorylation remained unchanged by Ni and/or MALP-2 exposure. IL-6 induced by Ni/MALP-2 co-exposure was partially dependent on activity of HIF-1alpha and COX-2 as shown by targeted knockdown using siRNA. IL-6 release in response to Ni/MALP-2 was partially sensitive to pharmacological inhibition of ERK(1/2), p38, and PI3K signaling. The protein kinase inhibitors had minimal or no effects on Ni/MALP-2-induced accumulation of HIF-1alpha protein, however, COX-2 expression and, more markedly PGE(2) production, were suppressed by LY294002, SB203580, and U0126. Thus, Ni/MALP-2 interactions involve multiple protein kinase pathways (ERK(1/2), p38, and PI3K) that modulate events downstream from the early accumulation of HIF-1alpha to promote IL-6 gene expression directly or secondarily, through COX-2-derived autocrine products like PGE(2).
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Affiliation(s)
- Fei Gao
- Department of Environmental & Occupational Health, Center for Free Radical and Antioxidant Health, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA 15219, USA
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56
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Induction of heme oxygenase-1 by acrolein mediates a cytoprotective effect in HepG2 cells. Mol Cell Toxicol 2010. [DOI: 10.1007/s13273-010-0029-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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57
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Uncaria rhynchophylla induces heme oxygenase-1 as a cytoprotective effect in RAW 264.7 macrophages. Mol Cell Toxicol 2010. [DOI: 10.1007/s13273-010-0005-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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58
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Liu DS, Wang T, Han SX, Dong JJ, Liao ZL, He GM, Chen L, Chen YJ, Xu D, Hou Y, Li YP, Wen FQ. p38 MAPK and MMP-9 cooperatively regulate mucus overproduction in mice exposed to acrolein fog. Int Immunopharmacol 2009; 9:1228-35. [DOI: 10.1016/j.intimp.2009.07.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2008] [Revised: 07/01/2009] [Accepted: 07/11/2009] [Indexed: 10/20/2022]
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59
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Yang CM, Lee IT, Lin CC, Yang YL, Luo SF, Kou YR, Hsiao LD. Cigarette smoke extract induces COX-2 expression via a PKCalpha/c-Src/EGFR, PDGFR/PI3K/Akt/NF-kappaB pathway and p300 in tracheal smooth muscle cells. Am J Physiol Lung Cell Mol Physiol 2009; 297:L892-902. [PMID: 19717552 DOI: 10.1152/ajplung.00151.2009] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Exposure to cigarette smoke extract (CSE) leads to airway or lung inflammation, which may be mediated through cyclooxygenase-2 (COX-2) expression and its product prostaglandin E2 (PGE2) synthesis. The aim of this study was to investigate the molecular mechanisms underlying CSE-induced COX-2 expression in human tracheal smooth muscle cells (HTSMCs). Here, we describe that COX-2 induction is dependent on PKCalpha/c-Src/EGFR, PDGFR/PI3K/Akt/NF-kappaB signaling in HTSMCs. CSE stimulated the phosphorylation of c-Src, EGFR, PDGFR, and Akt, which were inhibited by pretreatment with the inhibitor of PKCalpha (Gö6976 or Gö6983), c-Src (PP1), EGFR (AG1478), PDGFR (AG1296), or PI3K (LY294002). Moreover, CSE induced a significant increase in COX-2 expression, which was reduced by pretreatment with these inhibitors or transfection with siRNA of PKCalpha, Src, or Akt. Furthermore, CSE-stimulated NF-kappaB p65 phosphorylation and translocation were also attenuated by pretreatment with Gö6976, PP1, AG1478, AG1296, or LY294002. CSE-induced COX-2 expression was also mediated through the recruitment of p300 associated with NF-kappaB in HTSMCs, revealed by coimmunoprecipitation and Western blot analysis. In addition, pretreatment with the inhibitors of NF-kappaB (helenalin) and p300 (garcinol) or transfection with p65 siRNA and p300 siRNA markedly inhibited CSE-regulated COX-2 expression. However, CSE-induced PGE2 generation was reduced by pretreatment with the inhibitor of COX-2 (NS-398). These results demonstrated that in HTSMCs, CSE-induced COX-2-dependent PGE2 generation was mediated through PKCalpha/c-Src/EGFR, PDGFR/PI3K/Akt leading to the recruitment of p300 with NF-kappaB complex.
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Affiliation(s)
- Chuen-Mao Yang
- Department of Pharmacology, Chang Gung University, Chang Gung Memorial Hospital, 259 Wen-Hwa 1st Road, Kwei-San, Tao-Yuan, Taiwan.
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60
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Joshi-Barve S, Amancherla K, Patil M, Bhatnagar A, Mathews S, Gobejishvili L, Cave M, McClain C, Barve S. Acrolein, a ubiquitous pollutant and lipid hydroperoxide product, inhibits antiviral activity of interferon-alpha: relevance to hepatitis C. Free Radic Biol Med 2009; 47:47-54. [PMID: 19345260 PMCID: PMC3947765 DOI: 10.1016/j.freeradbiomed.2009.03.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Revised: 03/26/2009] [Accepted: 03/26/2009] [Indexed: 01/31/2023]
Abstract
Hepatitis C virus (HCV) infection is a major cause of chronic liver disease and can lead to hepatocellular carcinoma and end-stage liver disease. The current FDA-approved treatment for HCV (pegylated interferon-alpha (IFNalpha) with ribavirin) is effective in only about 50% of patients. Epidemiological evidence suggests that obesity, alcohol, smoking, and environmental pollutants may contribute to resistance to IFNalpha therapy in HCV. Acrolein, a ubiquitous environmental pollutant and major component of cigarette smoke, is also generated endogenously by cellular metabolism and lipid peroxidation. This study examines the effects of acrolein on (i) IFNalpha-mediated signaling and antiviral gene expression in cultured and primary human hepatocytes and (ii) HCV replication in an HCV-replicon system. Our data demonstrate that nontoxic concentrations of acrolein significantly inhibited IFNalpha-induced tyrosine phosphorylation of both cytoplasmic and nuclear STAT1 and STAT2, without altering the total levels. Also, acrolein down-regulated IFNalpha-stimulated gene transcription, resulting in reduced expression of antiviral genes. Importantly, acrolein abolished the IFNalpha-mediated down-regulation of HCV viral expression in the HCV-replicon system. This study defines mechanisms involved in resistance to IFNalpha and identifies the pathogenic role of acrolein, and potentially other environmental pollutants, in suppressing IFNalpha antiviral activity and establishes their adverse impact on HCV therapy.
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Affiliation(s)
- Swati Joshi-Barve
- Department of Medicine, University of Louisville Medical Center
- Department of Pharmacology & Toxicology, University of Louisville Medical Center
| | | | - Madhuvanti Patil
- Department of Pharmacology & Toxicology, University of Louisville Medical Center
| | - Aruni Bhatnagar
- Department of Medicine, University of Louisville Medical Center
- Department of Pharmacology & Toxicology, University of Louisville Medical Center
| | - Stephanie Mathews
- Department of Pharmacology & Toxicology, University of Louisville Medical Center
| | | | - Matthew Cave
- Department of Medicine, University of Louisville Medical Center
- Louisville VA Medical Center, Louisville, Kentucky
| | - Craig McClain
- Department of Medicine, University of Louisville Medical Center
- Department of Pharmacology & Toxicology, University of Louisville Medical Center
- Louisville VA Medical Center, Louisville, Kentucky
| | - Shirish Barve
- Department of Medicine, University of Louisville Medical Center
- Department of Pharmacology & Toxicology, University of Louisville Medical Center
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61
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Castro P, Nasser H, Abrahão A, Dos Reis LC, Riça I, Valença SS, Rezende DC, Quintas LEM, Cavalcante MCM, Porto LC, Koatz VLG. Aspirin and indomethacin reduce lung inflammation of mice exposed to cigarette smoke. Biochem Pharmacol 2009; 77:1029-39. [PMID: 19161990 DOI: 10.1016/j.bcp.2008.12.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2008] [Revised: 12/09/2008] [Accepted: 12/11/2008] [Indexed: 01/04/2023]
Abstract
Neutrophil accumulation response to cigarette smoke (CS) in humans and animal models is believed to play an important role in pathogenesis of many tobacco-related lung diseases. Here we evaluated the lung anti-inflammatory effect of aspirin and indomethacin in mice exposed to CS. C57BL/6 mice were exposed to four cigarettes per day during 4 days and were treated i.p. with aspirin or indomethacin, administered each day 1h before CS exposure. Twenty four hours after the last exposure, cells and inflammatory mediators were assessed in bronchoalveolar lavage (BAL) fluid and the lungs used for evaluation of lipid peroxidation, p38 mitogen-activated protein kinase (MAPK) phosphorylation and nuclear transcription factor kappaB (NF-kappaB) activation. Exposure to CS resulted in a marked lung neutrophilia. Moreover, the levels of oxidative stress-related lipid peroxidation, prostaglandin E(2) (PGE(2)), interleukin 1beta (IL-1beta), monocyte chemotactic protein 1 (MCP-1), and activated NF-kappaB and p38 MAPK were greatly increased in CS group. Aspirin or indomethacin treatment led to a significant reduction of neutrophil influx, but only aspirin resulted in dramatic decrease of inflammatory mediators. Moreover, both drugs reduced lung p38 MAPK and NF-kappaB activation induced by CS. These results demonstrate that short-term CS exposure has profound airway inflammatory effects counteracted by the anti-inflammatory agents aspirin and indomethacin, probably through COX-dependent and -independent mechanisms.
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Affiliation(s)
- Paulo Castro
- Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Brazil
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62
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Epidermal growth factor-dependent cyclooxygenase-2 induction in gliomas requires protein kinase C-δ. Oncogene 2009; 28:1410-20. [DOI: 10.1038/onc.2008.500] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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63
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Lamon BD, Hajjar DP. Inflammation at the molecular interface of atherogenesis: an anthropological journey. THE AMERICAN JOURNAL OF PATHOLOGY 2008; 173:1253-64. [PMID: 18948435 DOI: 10.2353/ajpath.2008.080442] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Despite the multifactorial nature of atherosclerosis, substantial evidence has established inflammation as an often surreptitious, yet critical and unifying driving force which promotes disease progression. To this end, research has defined molecular networks initiated by cytokines, growth factors and other pro-inflammatory molecules which promote hallmarks of atherosclerosis such as endothelial dysfunction, macrophage infiltration, LDL oxidation, cell proliferation and thrombosis. Although commonly associated with risk factors such as dyslipidemia, diabetes and hypertension, the global etiology of atherosclerosis may be alternatively attributed to underlying anthropological pressures. The agricultural, industrial and technological revolutions produced alterations in dietary, social and economic factors which have collectively exaggerated the exposure of the human genome to environmental stimuli. Furthermore, advances in sanitation, nutrition, and medicine have increased the lifespan of humans, effectively prolonging blood vessel exposure to these factors. As a result, the vasculature has become conditioned to respond to injury with what is arguably an overzealous immunological response; thus setting the stage for the prevalence of cardiovascular disease, including atherosclerotic plaque development in Western populations. Evidence suggests that each of these alterations can be linked to specific mediators in the inflammatory process. Integration of these factors with an inflammation-based hypothesis of atherosclerosis has yet to be extrapolated to observations in the realms of basic and clinical sciences and is the focus of this review.
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Affiliation(s)
- Brian D Lamon
- Department of Pathology and Laboratory Medicine, Center of Vascular Biology, Weill Cornell Medical College, Cornell University, New York, NY 10065, USA.
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64
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Berry KAZ, Henson PM, Murphy RC. Effects of Acrolein on Leukotriene Biosynthesis in Human Neutrophils. Chem Res Toxicol 2008; 21:2424-32. [DOI: 10.1021/tx800333u] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Karin A. Zemski Berry
- Department of Pharmacology, MSC 8303, University of Colorado Denver, RC1 South, L18-6120, 12801 East 17th Avenue, P.O. Box 6511, Aurora, Colorado 80045, and Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206
| | - Peter M. Henson
- Department of Pharmacology, MSC 8303, University of Colorado Denver, RC1 South, L18-6120, 12801 East 17th Avenue, P.O. Box 6511, Aurora, Colorado 80045, and Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206
| | - Robert C. Murphy
- Department of Pharmacology, MSC 8303, University of Colorado Denver, RC1 South, L18-6120, 12801 East 17th Avenue, P.O. Box 6511, Aurora, Colorado 80045, and Department of Pediatrics, National Jewish Health, 1400 Jackson Street, Denver, Colorado 80206
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65
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Thompson CA, Burcham PC. Genome-Wide Transcriptional Responses to Acrolein. Chem Res Toxicol 2008; 21:2245-56. [DOI: 10.1021/tx8001934] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Colin A. Thompson
- Pharmacology and Anaesthesiology Unit, School of Medicine and Pharmacology, The University of Western Australia, Perth WA 6009, Australia
| | - Philip C. Burcham
- Pharmacology and Anaesthesiology Unit, School of Medicine and Pharmacology, The University of Western Australia, Perth WA 6009, Australia
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66
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Yamawaki H, Saito K, Okada M, Hara Y. Methylglyoxal mediates vascular inflammation via JNK and p38 in human endothelial cells. Am J Physiol Cell Physiol 2008; 295:C1510-7. [PMID: 18842828 DOI: 10.1152/ajpcell.00252.2008] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Methylglyoxal (MGO) is a reactive metabolite of glucose. Since the plasma concentration of MGO is increased in diabetic patients, MGO is implicated in diabetes-associated vascular endothelial cells (ECs) injury, which might be responsible for atherosclerosis. In the present study, we examined effects of treatment of human umbilical vein ECs with MGO on EC morphology and inflammatory responses. MGO (24 h) induced cytotoxic morphological changes in a concentration-dependent manner (0-420 microM). MGO induced mRNA and protein expression of cyclooxygenase (COX)-2 in a concentration (0-420 microM)- and time (6-24 h)-dependent manner. COX-2 induction was associated with increased PGE(2) release. Acute treatment with MGO (20 min) induced concentration-dependent (0-420 microM) activation of JNK and p38 MAP kinase but not ERK or NF-kappaB. Both the JNK inhibitor SP600125 and the p38 inhibitor SB203580 prevented the MGO induction of COX-2. However, inhibiting JNK and p38 or COX-2 was ineffective to the morphological damage by MGO (420 microM, 24 h). EUK134, a synthetic combined superoxide dismutase/catalase mimetic, had no effect on MGO-induced COX-2. Present results indicated that MGO mediates JNK- and p38-dependent EC inflammatory responses, which might be independent of oxidative stress. On the other hand, MGO-induced morphological cell damage seems unlikely to be associated with COX-2-PGE(2).
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Affiliation(s)
- Hideyuki Yamawaki
- Dept. of Veterinary Pharmacology, Kitasato University., Towada, Aomori 034-8628, Japan.
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67
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Haberzettl P, Vladykovskaya E, Srivastava S, Bhatnagar A. Role of endoplasmic reticulum stress in acrolein-induced endothelial activation. Toxicol Appl Pharmacol 2008; 234:14-24. [PMID: 18951912 DOI: 10.1016/j.taap.2008.09.019] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2008] [Revised: 09/09/2008] [Accepted: 09/11/2008] [Indexed: 11/15/2022]
Abstract
Acrolein is a ubiquitous environmental pollutant and an endogenous product of lipid peroxidation. It is also generated during the metabolism of several drugs and amino acids. In this study, we examined the effects of acrolein on endothelial cells. Treatment of human umbilical vein endothelial cells (HUVECs) with 2 to 10 microM acrolein led to an increase in the phosphorylation of eIF-2alpha within 10 to 30 min of exposure. This was followed by alternate splicing of XBP-1 mRNA and an increase in the expression of the endoplasmic reticulum (ER) chaperone genes Grp78 and Herp. Within 2-4 h of treatment, acrolein also increased the abundance and the nuclear transport of the transcription factors ATF3, AFT4, and CHOP. Acrolein-induced increase in ATF3 was prevented by treating the cells with the chemical chaperone - phenylbutyric acid (PBA). Treatment with acrolein increased phosphorylation of ERK1/2, p38, and JNK. The increase in JNK phosphorylation was prevented by PBA. Acrolein treatment led to activation and nuclear translocation of the transcription factor NF-kappaB and an increase in TNF-alpha, IL-6 and IL-8, but not MCP-1, mRNA. Increased expression of cytokine genes and NF-kappaB activation were not observed in cells treated with PBA. These findings suggest that exposure to acrolein induces ER stress and triggers the unfolded protein response and that NF-kappaB activation and stimulation of cytokine production by acrolein could be attributed, in part, to ER stress. Chemical chaperones of protein-folding may be useful in treating toxicological and pathological states associated with excessive acrolein exposure or production.
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Affiliation(s)
- Petra Haberzettl
- Institute of Molecular Cardiology, Department of Medicine, University of Louisville, Louisville, KY 40202, USA
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68
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Acrolein sequestering ability of the endogenous tripeptide glycyl-histidyl-lysine (GHK): Characterization of conjugation products by ESI-MSn and theoretical calculations. J Pharm Biomed Anal 2008; 47:596-602. [DOI: 10.1016/j.jpba.2008.02.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2007] [Revised: 02/06/2008] [Accepted: 02/08/2008] [Indexed: 11/23/2022]
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69
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Glyoxal causes inflammatory injury in human vascular endothelial cells. Biochem Biophys Res Commun 2008; 369:1155-9. [DOI: 10.1016/j.bbrc.2008.03.020] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2008] [Accepted: 03/05/2008] [Indexed: 12/19/2022]
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70
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Park YS, Taniguchi N. Acrolein Induces Inflammatory Response Underlying Endothelial Dysfunction. Ann N Y Acad Sci 2008; 1126:185-9. [DOI: 10.1196/annals.1433.034] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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71
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Macedo FYB, Baltazar F, Mourão LC, Almeida PRC, Mota JMSC, Schmitt FC, Ribeiro RA. Induction of COX-2 expression by acrolein in the rat model of hemorrhagic cystitis. ACTA ACUST UNITED AC 2008; 59:425-30. [PMID: 18234483 DOI: 10.1016/j.etp.2007.10.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2007] [Accepted: 10/18/2007] [Indexed: 11/15/2022]
Abstract
AIM Acrolein (ACR) is a urinary metabolite of cyclophosphamide (CPS) and ifosfamide (IFS), which has been demonstrated to be the causative agent of hemorrhagic cystitis (HC), induced by these compounds. In this study, we investigate the participation of cyclooxygenase-2 (COX-2) on ACR-induced HC. METHODS Male Wistar rats (150-200g; six rats per group) were treated with distilled water or intravesical ACR and analyzed by changes in bladder wet weight, macroscopic and microscopic parameters and COX-2 expression. RESULTS COX-2 immunohistochemical expression was significant 12h after ACR administration mainly in subepithelial cells. ACR injection also alters some macroscopic and microscopic parameters in bladder of rats analyzed by Gray's criteria. CONCLUSIONS COX-2 participates in the pathogenesis of ACR-induced HC first seen 12h after initial contact between ACR and urothelium.
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Affiliation(s)
- Francisco Yuri Bulcão Macedo
- Department of Physiology and Pharmacology, Federal University of Ceara, Rua Coronel Nunes de Melo, 1315, Rodolfo Teofilo, 60430-270 fortaleza, CE, Brazil.
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