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Chemopreventive action of non-steroidal anti-inflammatory drugs in 9,10-dimethylbenzanthracene induced lung carcinogenesis in BALB/C mice: Expression of COX-1, COX-2 and Nf-κB. J Appl Biomed 2018. [DOI: 10.1016/j.jab.2018.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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52
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Tang N, Liu L, Qiu H, Shi W, Mao D. Analysis of gene expression and functional changes of adrenal gland in a rat model of kidney yang deficiency syndrome treated with Sini decoction. Exp Ther Med 2018; 16:3107-3115. [PMID: 30214533 DOI: 10.3892/etm.2018.6521] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 01/12/2018] [Indexed: 12/28/2022] Open
Abstract
Sini decoction (SND), a well-known traditional Chinese medicine, has been used to treat kidney Yang deficiency for ~1,800 years. The present study aimed to evaluate the effects of SND treatment on hypothalamic-pituitary-adrenal axis hormones in a rat model of Yang deficiency and to explore the molecular mechanisms using microarray analysis of adrenal glands and in vitro adrenocortical cell culture systems. The results indicated that SND treatment recovered circulating serum cortisol, adrenocortical hormone (ACTH) and testosterone levels in a yang deficiency model. Immunohistochemical analysis of pituitary and hypothalamic tissues confirmed increased expression of ACTH and corticotropin-releasing factor, respectively, in response to SND treatment. Microarray analysis identified a marked upregulation of genes involved in ≤metabolic and stress response pathways in rat adrenal tissues in response to SND treatment, exemplified by cyclooxygenase-2 and nuclear factor (NF)-κB. In vitro, SND exerted a protective effect on mitochondria in response to H2O2 exposure also activated NF-κB and cyclic adenosine monophosphate response element binding protein reporter gene activity. These results contributed towards an improved understanding of how SND effectively alleviates the symptoms of kidney Yang deficiency syndrome at the molecular level.
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Affiliation(s)
- Nong Tang
- Department of Traditional Chinese Medicine, Guangxi University of Chinese Medicine, Nanning, Guangxi 530023, P.R. China
| | - Lihong Liu
- Department of Traditional Chinese Medicine, Guangxi University of Chinese Medicine, Nanning, Guangxi 530023, P.R. China
| | - Hua Qiu
- Department of Hepatology, The First Affiliated Hospital of Guangxi University of Chinese Medicine, Nanning, Guangxi 530023, P.R. China
| | - Wei Shi
- Department of Nephrology, The First Affiliated Hospital of Guangxi University of Chinese Medicine, Nanning, Guangxi 530023, P.R. China
| | - Dewen Mao
- Department of Hepatology, The First Affiliated Hospital of Guangxi University of Chinese Medicine, Nanning, Guangxi 530023, P.R. China
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Yi Y, Cheng JC, Klausen C, Leung PC. TGF-β1 inhibits human trophoblast cell invasion by upregulating cyclooxygenase-2. Placenta 2018; 68:44-51. [DOI: 10.1016/j.placenta.2018.06.313] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 06/13/2018] [Accepted: 06/29/2018] [Indexed: 01/13/2023]
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54
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Rodler D, Sinowatz F. Functional Morphology of Thecal Glands in the Ovary of Japanese Quails (Coturnix japonica). Cells Tissues Organs 2018; 205:32-41. [PMID: 29495007 DOI: 10.1159/000486544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 12/28/2017] [Indexed: 11/19/2022] Open
Abstract
The role of thecal glands in the ovary of birds remains controversial. Using transmission electron microscopy and immunohistochemistry, immunohistochemical localisation of cyclooxygenase I and II (COX-1 and COX-2), oestrogen receptor α and β (ER-α and ER-β), androgen receptor (AR) and progesterone receptor (PR), a detailed analysis of the thecal glands was performed. Our ultrastructural studies revealed that the thecal glands of the quail ovary consist of 2 cell types, steroid-producing cells (SPCs) and enclosing cells (ENCs). The SPCs are large, light cells containing a varying number of lipid droplets. Their cytoplasm is characterised by a large amount of smooth endoplasmic reticulum. The ENCs are always located at the periphery of the gland. Some ENCs contain an abundant number of microfilaments, but lipid droplets and dense bodies were rare. Within 1 gland, SPCs with distinct COX-2 immunostaining were interspersed between usually larger numbers of moderately COX-2-positive cells. A completely different staining pattern was observed for COX-1, where the cytoplasm of the ENCs was distinctly immunopositive. The SPCs stained only weakly with antibodies to COX-1. The thecal glands showed distinct reactions for ER-β but only a weak to negative one for ER-α, PR, and AR. Our immunohistochemical and ultrastructural data support our hypothesis that the thecal glands of the quail are involved in steroid hormone and prostaglandin synthesis. The prostaglandins secreted by the thecal glands probably contribute to the ovulation of the follicle first in the hierarchy.
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55
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Wang X, Bao R, Fu J. The Antagonistic Effect of Selenium on Cadmium-Induced Damage and mRNA Levels of Selenoprotein Genes and Inflammatory Factors in Chicken Kidney Tissue. Biol Trace Elem Res 2018; 181:331-339. [PMID: 28510033 DOI: 10.1007/s12011-017-1041-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 04/28/2017] [Indexed: 01/15/2023]
Abstract
Selenium (Se) is a necessary trace mineral in the diet of humans and animals. Cadmium (Cd) is a toxic heavy metal that can damage animal organs, especially the kidneys. Antagonistic interactions between Se and Cd have been reported in previous studies. However, little is known about the effects of Se against Cd toxicity and on the mRNA levels of 25 selenoprotein genes and inflammatory factors in chicken kidneys. In the current study, we fed chickens with a Se-treated, Cd-treated, or Se/Cd treated diet for 90 days. We then analyzed the mRNA expression of inflammatory factors (including prostaglandin E synthase (PTGES), nuclear factor-kappa B (NF-κB), tumor necrosis factor-α (TNF-α), and cyclooxygenase-2 (COX-2)) and 25 selenoprotein genes (Gpx1, Gpx2, Gpx3, Gpx4, Txnrd1, Txnrd2, Txnrd3, Dio1, Dio2, Dio3, SPS2, Sepp1, SelPb, Sep15, Selh, Seli, Selm, Selo, Sels, Sepx1, Selu, Selk, Selw, Seln, Selt). The results demonstrated that Cd exposure increased the Cd content in the chicken kidneys, renal tubular epithelial cells underwent denaturation and necrosis, and the tubules became narrow or disappeared. However, Se supplementation reduced the Cd content in chicken kidneys and induced normal development of renal tubular epithelial cells. In addition, we also observed that Se alleviated the Cd-induced increase in the mRNA levels of inflammatory factors and ameliorated the Cd-induced downtrend in the mRNA levels of 25 selenoprotein genes in chicken kidneys.
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Affiliation(s)
- Xinyue Wang
- College of Life Science, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Rongkun Bao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Jing Fu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
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56
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Gong Y, Hewett JA. Maintenance of the Innate Seizure Threshold by Cyclooxygenase-2 is Not Influenced by the Translational Silencer, T-cell Intracellular Antigen-1. Neuroscience 2018; 373:37-51. [PMID: 29337236 DOI: 10.1016/j.neuroscience.2018.01.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 12/23/2017] [Accepted: 01/03/2018] [Indexed: 12/13/2022]
Abstract
Activity of neuronal cyclooxygenase-2 (COX-2), a primary source of PG synthesis in the normal brain, is enhanced by excitatory neurotransmission and this is thought to be involved in seizure suppression. Results herein showing that the incidence of pentylenetetrazole (PTZ)-induced convulsions is suppressed in transgenic mice overexpressing COX-2 in neurons support this notion. T-cell intracellular antigen-1 (TIA-1) is an mRNA binding protein that is known to bind to COX-2 mRNA and repress its translation in non-neuronal cell types. An examination of the expression profile of TIA-1 protein in the normal brain indicated that it is expressed broadly by neurons, including those that express COX-2. However, whether TIA-1 regulates COX-2 protein levels in neurons is not known. The purpose of this study was to test the possibility that deletion of TIA-1 increases basal COX-2 expression in neurons and consequently raises the seizure threshold. Results demonstrate that neither the basal nor seizure-induced expression profiles of COX-2 were altered in mice lacking a functional TIA-1 gene suggesting that TIA-1 does not contribute to regulation of COX-2 protein expression in neurons. The acute PTZ-induced seizure threshold was also unchanged in mice lacking TIA-1 protein, indicating that this RNA binding protein does not influence the innate seizure threshold. Nevertheless, the results raise the possibility that the level of neuronal COX-2 expression may be a determinant of the innate seizure threshold and suggest that a better understanding of the regulation of COX-2 expression in the brain could provide new insight into the molecular mechanisms that suppress seizure induction.
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Affiliation(s)
- Yifan Gong
- Program in Neuroscience, Department of Biology, Syracuse University, Syracuse, NY 13244, USA
| | - James A Hewett
- Program in Neuroscience, Department of Biology, Syracuse University, Syracuse, NY 13244, USA.
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57
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Distinct Signature of Oxylipid Mediators of Inflammation during Infection and Asymptomatic Colonization by E. coli in the Urinary Bladder. Mediators Inflamm 2017; 2017:4207928. [PMID: 29445256 PMCID: PMC5763092 DOI: 10.1155/2017/4207928] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 11/27/2017] [Indexed: 12/04/2022] Open
Abstract
Urinary tract infection (UTI) is an extremely common infectious disease. Uropathogenic Escherichia coli (UPEC) is the predominant etiological agent of UTI. Asymptomatic bacteriuric E. coli (ABEC) strains successfully colonize the urinary tract resulting in asymptomatic bacteriuria (ABU) and do not induce symptoms associated with UTI. Oxylipids are key signaling molecules involved in inflammation. Based on the distinct clinical outcomes of E. coli colonization, we hypothesized that UPEC triggers the production of predominantly proinflammatory oxylipids and ABEC leads to production of primarily anti-inflammatory or proresolving oxylipids in the urinary tract. We performed quantitative detection of 39 oxylipid mediators with proinflammatory, anti-inflammatory, and proresolving properties, during UTI and ABU caused by genetically distinct E. coli strains in the murine urinary bladder. Our results reveal that infection with UPEC causes an increased accumulation of proinflammatory oxylipids as early as 6 h postinoculation, compared to controls. To the contrary, ABEC colonization leads to decreased accumulation of proinflammatory oxylipids at the early time point compared to UPEC infection but does not affect the level of proresolving oxylipids. This report represents the first comprehensive investigation on the oxylipidome during benign ABEC colonization observed in ABU and acute inflammation triggered by UPEC leading to UTI.
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58
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Montford JR, Lehman AMB, Bauer CD, Klawitter J, Klawitter J, Poczobutt JM, Scobey M, Weiser-Evans M, Nemenoff RA, Furgeson SB. Bone marrow-derived cPLA2α contributes to renal fibrosis progression. J Lipid Res 2017; 59:380-390. [PMID: 29229740 DOI: 10.1194/jlr.m082362] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Indexed: 12/17/2022] Open
Abstract
The group IVA calcium-dependent cytosolic phospholipase A2 (cPLA2α) enzyme directs a complex "eicosanoid storm" that accompanies the tissue response to injury. cPLA2α and its downstream eicosanoid mediators are also implicated in the pathogenesis of fibrosis in many organs, including the kidney. We aimed to determine the role of cPLA2α in bone marrow-derived cells in a murine model of renal fibrosis, unilateral ureteral obstruction (UUO). WT C57BL/6J mice were irradiated and engrafted with donor bone marrow from either WT mice [WT-bone marrow transplant (BMT)] or mice deficient in cPLA2α (KO-BMT). After full engraftment, mice underwent UUO and kidneys were collected 3, 7, and 14 days after injury. Using picrosirius red, collagen-3, and smooth muscle α actin staining, we determined that renal fibrosis was significantly attenuated in KO-BMT animals as compared with WT-BMT animals. Lipidomic analysis of homogenized kidneys demonstrated a time-dependent upregulation of pro-inflammatory eicosanoids after UUO; KO-BMT animals had lower levels of many of these eicosanoids. KO-BMT animals also had fewer infiltrating pro-inflammatory CD45+CD11b+Ly6Chi macrophages and reduced message levels of pro-inflammatory cytokines. Our results indicate that cPLA2α and/or its downstream mediators, produced by bone marrow-derived cells, play a major role in eicosanoid production after renal injury and in renal fibrinogenesis.
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Affiliation(s)
- John R Montford
- Department of Medicine, Renal Division, University of Colorado Anschutz Medical Campus, Aurora, CO .,Denver Veterans Affairs Medical Center, Denver, CO
| | - Allison M B Lehman
- Department of Medicine, Renal Division, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Colin D Bauer
- Department of Medicine, Renal Division, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Jelena Klawitter
- Department of Medicine, Renal Division, University of Colorado Anschutz Medical Campus, Aurora, CO.,Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Jost Klawitter
- Department of Medicine, Renal Division, University of Colorado Anschutz Medical Campus, Aurora, CO.,Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Joanna M Poczobutt
- Department of Medicine, Renal Division, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Micah Scobey
- Department of Medicine, Renal Division, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Mary Weiser-Evans
- Department of Medicine, Renal Division, University of Colorado Anschutz Medical Campus, Aurora, CO.,School of Medicine, Consortium for Fibrosis Research and Translation, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Raphael A Nemenoff
- Department of Medicine, Renal Division, University of Colorado Anschutz Medical Campus, Aurora, CO.,School of Medicine, Consortium for Fibrosis Research and Translation, University of Colorado Anschutz Medical Campus, Aurora, CO
| | - Seth B Furgeson
- Department of Medicine, Renal Division, University of Colorado Anschutz Medical Campus, Aurora, CO.,School of Medicine, Consortium for Fibrosis Research and Translation, University of Colorado Anschutz Medical Campus, Aurora, CO.,Denver Health and Hospitals, Denver, CO
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59
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Piranda DN, Abreu RBV, Freitas-Alves DR, de Carvalho MA, Vianna-Jorge R. Modulation of the prostaglandin-endoperoxide synthase 2 gene expression by variant haplotypes: influence of the 3'-untranslated region. ACTA ACUST UNITED AC 2017; 51:e6546. [PMID: 29211250 PMCID: PMC5711006 DOI: 10.1590/1414-431x20176546] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 09/19/2017] [Indexed: 12/13/2022]
Abstract
The inducible inflammatory enzyme cycloxigenase-2 is up-regulated in cancer, and favors tumor progression. Cycloxigenase-2 is encoded by the prostaglandin-endoperoxide synthase 2 (PTGS2) gene, which presents sequence variations in the promoter region (PR) and in the 3′-untranslated region (3′-UTR). Different PR (rs689465, rs689466, rs20417) and 3′-UTR (rs5275) variants were generated by site-directed mutagenesis, and combined in haplotypes to access expression levels using a reporter system (luciferase) in human cells (MCF-7 and HEK293FT). Luciferase activity did not differ significantly among PTGS2 PR constructs, except for pAAC (containing variant allele rs20417 C), with 40% less activity than pAAG (wild-type sequence) in MCF-7 cells (P<0.01). Despite the lack of individual significant differences, PTGS2 PR constructs enclosing rs689466 G (pAGG and pAGC) showed an approximate two-fold increase in luciferase activity when compared to those containing rs689466 A (pAAG, pGAC, pAAC and pGAG) in both cell lines (P<0.001 for MCF-7 and P=0.03 for HEK293FT). The effect of PTGS2 3′-UTR sequences varied between MCF-7 and HEK293FT: MCF-7 cells showed significant reduction (40–60%) in luciferase activity (at least P<0.01), whereas HEK293FT cells showed more diverse results, with an average 2-fold increase when combined constructs (PR and 3′-UTR) were compared to respective parental PR sequences. The contribution of 3′-UTR variant (rs5275) was not consistent in either cell line. Despite the modulation of the 3′-UTR, with variable effects of rs5275, the enhancing transcriptional effect of rs689466 G was still detectable (P<0.0001 in MCF-7 or P=0.03 in HEK293FT cells).
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Affiliation(s)
- D N Piranda
- Coordenação de Pesquisa, Instituto Nacional de Câncer, Rio de Janeiro, RJ, Brasil.,Programa de Pós-Graduação em Farmacologia e Química Medicinal, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - R B V Abreu
- Coordenação de Pesquisa, Instituto Nacional de Câncer, Rio de Janeiro, RJ, Brasil
| | - D R Freitas-Alves
- Coordenação de Pesquisa, Instituto Nacional de Câncer, Rio de Janeiro, RJ, Brasil.,Programa de Pós-Graduação em Saúde Pública e Meio Ambiente, Escola Nacional de Saúde Pública Sérgio Arouca, FIOCRUZ, Rio de Janeiro, RJ, Brasil
| | - M A de Carvalho
- Coordenação de Pesquisa, Instituto Nacional de Câncer, Rio de Janeiro, RJ, Brasil.,Instituto Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
| | - R Vianna-Jorge
- Coordenação de Pesquisa, Instituto Nacional de Câncer, Rio de Janeiro, RJ, Brasil.,Programa de Pós-Graduação em Saúde Pública e Meio Ambiente, Escola Nacional de Saúde Pública Sérgio Arouca, FIOCRUZ, Rio de Janeiro, RJ, Brasil.,Programa de Pesquisa em Farmacologia e Inflamação, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
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60
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Zhang Z, Zheng F, Yu Z, Hao J, Chen M, Yu W, Guo W, Chen Y, Huang W, Duan Z, Deng W. XRCC5 cooperates with p300 to promote cyclooxygenase-2 expression and tumor growth in colon cancers. PLoS One 2017; 12:e0186900. [PMID: 29049411 PMCID: PMC5648251 DOI: 10.1371/journal.pone.0186900] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 10/09/2017] [Indexed: 01/20/2023] Open
Abstract
Cyclooxygenase (COX) is the rate-limiting enzyme in prostaglandins (PGs) biosynthesis. Previous studies indicate that COX-2, one of the isoforms of COX, is highly expressed in colon cancers and plays a key role in colon cancer carcinogenesis. Thus, searching for novel transcription factors regulating COX-2 expression will facilitate drug development for colon cancer. In this study, we identified XRCC5 as a binding protein of the COX-2 gene promoter in colon cancer cells with streptavidin-agarose pulldown assay and mass spectrometry analysis, and found that XRCC5 promoted colon cancer growth through modulation of COX-2 signaling. Knockdown of XRCC5 by siRNAs inhibited the growth of colon cancer cells in vitro and of tumor xenografts in a mouse model in vivo by suppressing COX-2 promoter activity and COX-2 protein expression. Conversely, overexpression of XRCC5 promoted the growth of colon cancer cells by activating COX-2 promoter and increasing COX-2 protein expression. Moreover, the role of p300 (a transcription co-activator) in acetylating XRCC5 to co-regulate COX-2 expression was also evaluated. Immunofluorescence assay and confocal microscopy showed that XRCC5 and p300 proteins were co-located in the nucleus of colon cancer cells. Co-immunoprecipitation assay also proved the interaction between XRCC5 and p300 in nuclear proteins of colon cancer cells. Cell viability assay indicated that the overexpression of wild-type p300, but not its histone acetyltransferase (HAT) domain deletion mutant, increased XRCC5 acetylation, thereby up-regulated COX-2 expression and promoted the growth of colon cancer cells. In contrast, suppression of p300 by a p300 HAT-specific inhibitor (C646) inhibited colon cancer cell growth by suppressing COX-2 expression. Taken together, our results demonstrated that XRCC5 promoted colon cancer growth by cooperating with p300 to regulate COX-2 expression, and suggested that the XRCC5/p300/COX-2 signaling pathway was a potential target in the treatment of colon cancers.
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Affiliation(s)
- Zhifeng Zhang
- The First Affiliated Hospital & Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Fufu Zheng
- The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Zhenlong Yu
- The First Affiliated Hospital & Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Jiajiao Hao
- The First Affiliated Hospital & Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Miao Chen
- SunYat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
| | - Wendan Yu
- The First Affiliated Hospital & Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Wei Guo
- The First Affiliated Hospital & Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Yiming Chen
- The First Affiliated Hospital & Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
| | - Wenlin Huang
- SunYat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
- State Key Laboratory of Targeted Drug for Tumors of Guangdong Province, Guangzhou Double Bioproduct Inc., Guangzhou, China
| | - Zhijun Duan
- The First Affiliated Hospital & Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
- * E-mail: (ZD); (WD)
| | - Wuguo Deng
- SunYat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Guangzhou, China
- State Key Laboratory of Targeted Drug for Tumors of Guangdong Province, Guangzhou Double Bioproduct Inc., Guangzhou, China
- * E-mail: (ZD); (WD)
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61
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Mirshafiey A, Taeb M, Mortazavi-Jahromi SS, Jafarnezhad-Ansariha F, Rehm BH, Esposito E, Cuzzocrea S, Matsuo H. Introduction of β- d -mannuronic acid (M2000) as a novel NSAID with immunosuppressive property based on COX-1/COX-2 activity and gene expression. Pharmacol Rep 2017; 69:1067-1072. [DOI: 10.1016/j.pharep.2017.04.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 04/05/2017] [Accepted: 04/20/2017] [Indexed: 10/19/2022]
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62
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Alexanian A, Sorokin A. Cyclooxygenase 2: protein-protein interactions and posttranslational modifications. Physiol Genomics 2017; 49:667-681. [PMID: 28939645 DOI: 10.1152/physiolgenomics.00086.2017] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Numerous studies implicate the cyclooxygenase 2 (COX2) enzyme and COX2-derived prostanoids in various human diseases, and thus, much effort has been made to uncover the regulatory mechanisms of this enzyme. COX2 has been shown to be regulated at both the transcriptional and posttranscriptional levels, leading to the development of nonsteroidal anti-inflammatory drugs (NSAIDs) and selective COX2 inhibitors (COXIBs), which inhibit the COX2 enzyme through direct targeting. Recently, evidence of posttranslational regulation of COX2 enzymatic activity by s-nitrosylation, glycosylation, and phosphorylation has also been presented. Additionally, posttranslational regulators that actively downregulate COX2 expression by facilitating increased proteasome degradation of this enzyme have also been reported. Moreover, recent data identified proteins, located in close proximity to COX2 enzyme, that serve as posttranslational modulators of COX2 function, upregulating its enzymatic activity. While the precise mechanisms of the protein-protein interaction between COX2 and these regulatory proteins still need to be addressed, it is likely these interactions could regulate COX2 activity either as a result of conformational changes of the enzyme or by impacting subcellular localization of COX2 and thus affecting its interactions with regulatory proteins, which further modulate its activity. It is possible that posttranslational regulation of COX2 enzyme by such proteins could contribute to manifestation of different diseases. The uncovering of posttranslational regulation of COX2 enzyme will promote the development of more efficient therapeutic strategies of indirectly targeting the COX2 enzyme, as well as provide the basis for the generation of novel diagnostic tools as biomarkers of disease.
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Affiliation(s)
- Anna Alexanian
- Cardiovascular Center and Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Andrey Sorokin
- Cardiovascular Center and Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
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63
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Wynne BM, Zou L, Linck V, Hoover RS, Ma HP, Eaton DC. Regulation of Lung Epithelial Sodium Channels by Cytokines and Chemokines. Front Immunol 2017; 8:766. [PMID: 28791006 PMCID: PMC5524836 DOI: 10.3389/fimmu.2017.00766] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Accepted: 06/16/2017] [Indexed: 12/20/2022] Open
Abstract
Acute lung injury leading to acute respiratory distress (ARDS) is a global health concern. ARDS patients have significant pulmonary inflammation leading to flooding of the pulmonary alveoli. This prevents normal gas exchange with consequent hypoxemia and causes mortality. A thin fluid layer in the alveoli is normal. The maintenance of this thin layer results from fluid movement out of the pulmonary capillaries into the alveolar interstitium driven by vascular hydrostatic pressure and then through alveolar tight junctions. This is then balanced by fluid reabsorption from the alveolar space mediated by transepithelial salt and water transport through alveolar cells. Reabsorption is a two-step process: first, sodium enters via sodium-permeable channels in the apical membranes of alveolar type 1 and 2 cells followed by active extrusion of sodium into the interstitium by the basolateral Na+, K+-ATPase. Anions follow the cationic charge gradient and water follows the salt-induced osmotic gradient. The proximate cause of alveolar flooding is the result of a failure to reabsorb sufficient salt and water or a failure of the tight junctions to prevent excessive movement of fluid from the interstitium to alveolar lumen. Cytokine- and chemokine-induced inflammation can have a particularly profound effect on lung sodium transport since they can alter both ion channel and barrier function. Cytokines and chemokines affect alveolar amiloride-sensitive epithelial sodium channels (ENaCs), which play a crucial role in sodium transport and fluid reabsorption in the lung. This review discusses the regulation of ENaC via local and systemic cytokines during inflammatory disease and the effect on lung fluid balance.
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Affiliation(s)
- Brandi M Wynne
- Department of Medicine, Nephrology, Emory University, Atlanta, GA, United States.,Department of Physiology, Emory University, Atlanta, GA, United States.,The Center for Cell and Molecular Signaling, Emory University, Atlanta, GA, United States
| | - Li Zou
- Department of Physiology, Emory University, Atlanta, GA, United States
| | - Valerie Linck
- Department of Physiology, Emory University, Atlanta, GA, United States
| | - Robert S Hoover
- Department of Medicine, Nephrology, Emory University, Atlanta, GA, United States.,Department of Physiology, Emory University, Atlanta, GA, United States.,Research Service, Atlanta Veteran's Administration Medical Center, Decatur, GA, United States
| | - He-Ping Ma
- Department of Physiology, Emory University, Atlanta, GA, United States.,The Center for Cell and Molecular Signaling, Emory University, Atlanta, GA, United States
| | - Douglas C Eaton
- Department of Physiology, Emory University, Atlanta, GA, United States.,The Center for Cell and Molecular Signaling, Emory University, Atlanta, GA, United States
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Shin SY, Kim HW, Jang HH, Hwang YJ, Choe JS, Kim JB, Lim Y, Lee YH. γ-Oryzanol suppresses COX-2 expression by inhibiting reactive oxygen species-mediated Erk1/2 and Egr-1 signaling in LPS-stimulated RAW264.7 macrophages. Biochem Biophys Res Commun 2017; 491:486-492. [PMID: 28728842 DOI: 10.1016/j.bbrc.2017.07.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 07/03/2017] [Indexed: 11/16/2022]
Abstract
Cyclooxygenase (COX)-2 produces prostanoids, which contribute to inflammatory responses. Nuclear factor (NF)-κB is a key transcription factor mediating COX-2 expression. γ-Oryzanol is an active component in rice bran oil, which inhibits lipopolysaccharide (LPS)-mediated COX-2 expression by inhibiting NF-κB. However, the inhibition of COX-2 expression by γ-oryzanol independently of NF-κB is poorly understood. We found that LPS upregulated Egr-1 expression at the transcriptional level. Forced expression of Egr-1 trans-activated the Cox-2 promoter independently of NF-κB. In contrast, silencing of Egr-1 abrogated LPS-mediated COX-2 expression. LPS produced reactive oxygen species (ROS), which, in turn, induced Egr-1 expression via the Erk1/2 MAPK pathway. ROS scavenging activity of γ-oryzanol suppressed Egr-1 expression by inhibiting the Erk1/2 MAPK pathway. Our results suggest that γ-oryzanol inhibits LPS-mediated COX-2 expression by suppressing Erk1/2-mediated Egr-1 expression. This study supports that γ-oryzanol may be useful for ameliorating LPS-mediated inflammatory responses.
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Affiliation(s)
- Soon Young Shin
- Department of Biological Sciences, Sanghuh College of Life Sciences, Konkuk University, Seoul 05029, Republic of Korea; Cancer and Metabolism Institute, Konkuk University, Seoul 05029, Republic of Korea
| | - Heon-Woong Kim
- Functional Food and Nutrition Division, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju 55365, Republic of Korea
| | - Hwan-Hee Jang
- Functional Food and Nutrition Division, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju 55365, Republic of Korea
| | - Yu-Jin Hwang
- Functional Food and Nutrition Division, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju 55365, Republic of Korea
| | - Jeong-Sook Choe
- Functional Food and Nutrition Division, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju 55365, Republic of Korea
| | - Jung-Bong Kim
- Functional Food and Nutrition Division, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju 55365, Republic of Korea
| | - Yoongho Lim
- Division of Bioscience and Biotechnology, BMIC, Konkuk University, Seoul 05029, Republic of Korea.
| | - Young Han Lee
- Department of Biological Sciences, Sanghuh College of Life Sciences, Konkuk University, Seoul 05029, Republic of Korea; Cancer and Metabolism Institute, Konkuk University, Seoul 05029, Republic of Korea.
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65
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Matsuwaki T, Komatsuda M, Fujisawa A, Doke M, Yamanouchi K, Nishihara M. Molecular species of prostaglandins involved in modulating luteinising hormone pulses of female rats under infectious stress conditions. J Neuroendocrinol 2017; 29. [PMID: 28544399 DOI: 10.1111/jne.12490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 04/28/2017] [Accepted: 05/16/2017] [Indexed: 11/28/2022]
Abstract
Mammalian reproductive function is controlled by the hypothalamic-pituitary-gonadal (HPG) axis, which is suppressed under infectious stress conditions. By analysing the pulsatility of luteinising hormone (LH), we have previously demonstrated that prostaglandins (PGs) in the central nervous system mediate infectious stress to suppress the activity of the HPG axis. The present study aimed to characterise the types of PGs responsible for suppression of the HPG axis. We focused on three major types of PGs: PGE2 , PGD2 and PGF2α . We used female rats overiectomised bilaterally 1 week before the experiments. Lipopolysaccharide (100 μg kg-1 ) suppressed LH pulses at the same time as enhancing the concentration of all three PGs in the cerebrospinal fluid, which was restored by indomethacin (10 mg kg-1 ). Subsequently, we observed LH pulsatility after a single injection of each PG and after co-injection of PGE2 with PGF2α into the third cerebral ventricle. A single injection of PGE2 dose-dependently induced a transient increase in mean LH concentration and LH pulse amplitude, and PGD2 significantly increased the amplitude of LH pulses, wereas PGF2α did not affect LH pulsatility. On the other hand, co-injection of PGE2 and PGF2α induced a significant suppression of both the frequency and amplitude of LH pulses. These results suggest that PGE2 and PGF2α can represent two of the mediators that suppress the HPG axis in situations of infectious stress. Moreover, the results imply that there are two contradictory effects of PGE2 on LH pulsatility: (i) enhancive when working alone and (ii) suppressive when working together with PGF2α .
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Affiliation(s)
- T Matsuwaki
- Department of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - M Komatsuda
- Department of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - A Fujisawa
- Department of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - M Doke
- Department of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - K Yamanouchi
- Department of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - M Nishihara
- Department of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
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66
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Liao X, Wang W, Fan C, Yang N, Zhao J, Zhang Y, Gao R, Shen G, Xia S, Li G. Prokaryotic expression, purification and characterization of human cyclooxygenase-2. Int J Mol Med 2017; 40:75-82. [PMID: 28560423 PMCID: PMC5466394 DOI: 10.3892/ijmm.2017.3007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 05/26/2017] [Indexed: 01/06/2023] Open
Abstract
Cyclooxygenase-2 (COX-2) is a key enzyme which catalyzes the conversion of arachidonic acid (AA) into prostaglandins (PGs). It plays an important role in pathophysiological processes, such as tumorigenesis, angiogenesis, inflammation and tumor cell drug resistance. Therefore, COX-2 has been viewed as an important target for cancer therapy. The preparation of COX-2 protein is an important initial step for the subsequent development of COX-2 inhibitors. In this study, we report a strategy to heterologously express truncated human COX-2 (trCOX-2) in Escherichia coli (E. coli) BL21(DE3) host cells. Following denaturation, purification and renaturation, we successfully obtained enzymatically active trCOX-2 containing 257 residues of the C-terminus. Homology modeling and molecular docking analyses revealed that trCOX-2 retained the predicted 3D catalytic domain structure and AA could still bind to its hydrophobic groove. Western blot analysis and ELISA indicated that the trCOX-2 still retained its characteristic antigenicity and binding activity, while COX assays revealed that trCOX-2 maintained its enzyme activity. On the whole, in this study, we provided a novel method to isolate trCOX-2 possessing AA binding and catalytic activities. This study thus lays a foundation to facilitate further investigations of COX-2 and offers a valuable method with which to achieve the prokaryotic expression of a eukaryotic membrane protein.
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Affiliation(s)
- Xiangzhi Liao
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun, Jilin 130012, P.R. China
| | - Wenhan Wang
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun, Jilin 130012, P.R. China
| | - Chuanxi Fan
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun, Jilin 130012, P.R. China
| | - Ning Yang
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun, Jilin 130012, P.R. China
| | - Jialiang Zhao
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun, Jilin 130012, P.R. China
| | - Ying Zhang
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun, Jilin 130012, P.R. China
| | - Ruijuan Gao
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun, Jilin 130012, P.R. China
| | - Guannan Shen
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun, Jilin 130012, P.R. China
| | - Simin Xia
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun, Jilin 130012, P.R. China
| | - Guiying Li
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun, Jilin 130012, P.R. China
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67
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Novel pyrazoles and pyrazolo[1,2- a ]pyridazines as selective COX-2 inhibitors; Ultrasound-assisted synthesis, biological evaluation, and DFT calculations. Bioorg Med Chem Lett 2017; 27:2377-2383. [DOI: 10.1016/j.bmcl.2017.04.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Revised: 04/04/2017] [Accepted: 04/06/2017] [Indexed: 01/02/2023]
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68
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Brazilian Green Propolis Extract Synergizes with Protoporphyrin IX-mediated Photodynamic Therapy via Enhancement of Intracellular Accumulation of Protoporphyrin IX and Attenuation of NF-κB and COX-2. Molecules 2017; 22:molecules22050732. [PMID: 28471399 PMCID: PMC6154578 DOI: 10.3390/molecules22050732] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 04/25/2017] [Accepted: 04/28/2017] [Indexed: 01/02/2023] Open
Abstract
Brazilian green propolis (BGP) is noted for its impressive antitumor effects and has been used as a folk medicine in various cultures for many years. It has been demonstrated that BGP could enhance the cytotoxic effect of cytostatic drugs on tumor cells. Photodynamic therapy (PDT) is a therapeutic approach used against malignant cells. To assess the synergistic effect of BGP extract on protoporphyrin IX (PpIX)-mediated photocytotoxicity, MTT assays were performed using A431 and HeLa cells. TUNEL assay and Annexin V-FITC/PI staining were performed to confirm the induction of apoptosis. Western blotting analysis was performed to examine the pro-apoptotic proteins, anti-apoptotic proteins and inflammation related proteins in A431 cells. Intracellular accumulation of PpIX was examined by flow cytometry. The synergistic effect of BGP extract in PpIX-PDT was also evaluated with a xenograft model. Our findings reveal that BGP extract increased PpIX-mediated photocytotoxicity in A431 and HeLa cells. PpIX-PDT with BGP extract treatment resulted in a decrease in Bcl-xL and an increase in NOXA, Bax and caspase-3 cleavage. The protein expression levels of p-IKKα/β, NF-κB and COX-2 were upregulated by PpIX-PDT but significantly attenuated when in combination with BGP extract. BGP extract was also found to significantly enhance the intracellular accumulation of PpIX in A431 cells. BGP extract increased PpIX-mediated photocytotoxicity in a xenograft model as well. Our findings provide evidence for a synergistic effect of BGP extract in PpIX-PDT both in vitro and in vivo.
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69
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Bando T, Fujita S, Nagano N, Yoshikawa S, Yamanishi Y, Minami M, Karasuyama H. Differential usage of COX-1 and COX-2 in prostaglandin production by mast cells and basophils. Biochem Biophys Rep 2017; 10:82-87. [PMID: 28955738 PMCID: PMC5614629 DOI: 10.1016/j.bbrep.2017.03.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 02/08/2017] [Accepted: 03/11/2017] [Indexed: 01/10/2023] Open
Abstract
Basophils have been erroneously considered as minor relatives of mast cells, due to some phenotypic similarity between them. While recent studies have revealed non-redundant roles for basophils in various immune responses, basophil-derived effector molecules, including lipid mediators, remain poorly characterized, compared to mast cell-derived ones. Here we analyzed and compared eicosanoids produced by mouse basophils and mast cells when stimulated with IgE plus allergens. The production of 5-LOX metabolites such as LTB4 and 5-HETE was detected as early as 0.5 h post-stimulation in both cell types, even though their amounts were much smaller in basophils than in mast cells. In contrast, basophils and mast cells showed distinct time course in the production of COX metabolites, including PGD2, PGE2 and 11-HETE. Their production by mast cells was detected at both 0.5 and 6 h post-stimulation while that by basophils was detectable only at 6 h. Of note, mast cells showed 8–9 times higher levels of COX-1 than did basophils at the resting status. In contrast to unaltered COX-1 expression with or without stimulation, COX-2 expression was up-regulated in both cell types upon activation. Importantly, when activated, basophils expressed 4–5 times higher levels of COX-2 than did mast cells. In accordance with these findings, the late-phase production of the COX metabolites by basophils was completely ablated by COX-2 inhibitor whereas the early-phase production by mast cells was blocked by COX-1 but not COX-2 inhibitor. Thus, the production of COX metabolites is differentially regulated by COX-1 and COX-2 in basophils and mast cells. Basophils and mast cells show distinct time course of COX metabolite production. Basophils and mast cells show differential expression and induction of COX isoforms. COX metabolite production by basophils but not mast cells is mediated by COX-2.
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Key Words
- BMBAs, bone marrow derived basophils
- BMMCs, bone marrow derived mast cells
- BW-A4C (PubChem CID: 6438354)
- Basophils
- COX, cyclooxygenase
- COX-2
- Celecoxib (PubChem CID: 2662)
- Eicosanoids
- HETE, hydroxyeicosatetraenoic acid
- LC-MS/MS
- LOX, lipoxygenase
- LTA4, leukotriene A4
- LTB4, leukotriene B4
- LTC4, leukotriene C4
- LTD4, leukotriene D4
- Mast cells
- OVA, Ovalbumin
- PGD2, prostaglandin D2
- PGE2, prostaglandin E2
- Prostaglandins
- SC-560 (PubChem CID: 4306515)
- TNP, 2,4,6-trinitrophenyl
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Affiliation(s)
- Tomoyuki Bando
- Department of Immune Regulation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan.,Ono pharmaceutical co., ltd. Exploratory Research Laboratories, 3-1-1 Sakurai, Shimamoto-Cho, Mishima-Gun, Osaka 618-8585, Japan
| | - Setsuko Fujita
- Ono pharmaceutical co., ltd. Exploratory Research Laboratories, 3-1-1 Sakurai, Shimamoto-Cho, Mishima-Gun, Osaka 618-8585, Japan
| | - Naoko Nagano
- Ono pharmaceutical co., ltd. Exploratory Research Laboratories, 3-1-1 Sakurai, Shimamoto-Cho, Mishima-Gun, Osaka 618-8585, Japan
| | - Soichiro Yoshikawa
- Department of Immune Regulation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Yoshinori Yamanishi
- Department of Immune Regulation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
| | - Masashi Minami
- Ono pharmaceutical co., ltd. Exploratory Research Laboratories, 3-1-1 Sakurai, Shimamoto-Cho, Mishima-Gun, Osaka 618-8585, Japan
| | - Hajime Karasuyama
- Department of Immune Regulation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
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70
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Hannemann N, Jordan J, Paul S, Reid S, Baenkler HW, Sonnewald S, Bäuerle T, Vera J, Schett G, Bozec A. The AP-1 Transcription Factor c-Jun Promotes Arthritis by Regulating Cyclooxygenase-2 and Arginase-1 Expression in Macrophages. THE JOURNAL OF IMMUNOLOGY 2017; 198:3605-3614. [PMID: 28298526 DOI: 10.4049/jimmunol.1601330] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 02/17/2017] [Indexed: 11/19/2022]
Abstract
Activation of proinflammatory macrophages is associated with the inflammatory state of rheumatoid arthritis. Their polarization and activation are controlled by transcription factors such as NF-κB and the AP-1 transcription factor member c-Fos. Surprisingly, little is known about the role of the AP-1 transcription factor c-Jun in macrophage activation. In this study, we show that mRNA and protein levels of c-Jun are increased in macrophages following pro- or anti-inflammatory stimulations. Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway enrichment cluster analyses of microarray data using wild-type and c-Jun-deleted macrophages highlight the central function of c-Jun in macrophages, in particular for immune responses, IL production, and hypoxia pathways. Mice deficient for c-Jun in macrophages show an amelioration of inflammation and bone destruction in the serum-induced arthritis model. In vivo and in vitro gene profiling, together with chromatin immunoprecipitation analysis of macrophages, revealed direct activation of the proinflammatory factor cyclooxygenase-2 and indirect inhibition of the anti-inflammatory factor arginase-1 by c-Jun. Thus, c-Jun regulates the activation state of macrophages and promotes arthritis via differentially regulating cyclooxygenase-2 and arginase-1 levels.
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Affiliation(s)
- Nicole Hannemann
- Department of Internal Medicine 3-Rheumatology and Immunology, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuremberg, 91054 Erlangen, Germany
| | - Jutta Jordan
- Preclinical Imaging Platform Erlangen, Institute of Radiology, University Hospital Erlangen, 91054 Erlangen, Germany
| | - Sushmita Paul
- Laboratory of Systems Tumor Immunology, Department of Dermatology, University Hospital Erlangen, 91054 Erlangen, Germany; and
| | - Stephen Reid
- Division of Biochemistry, Friedrich Alexander University Erlangen-Nuremberg, 91054 Erlangen, Germany
| | - Hanns-Wolf Baenkler
- Department of Internal Medicine 3-Rheumatology and Immunology, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuremberg, 91054 Erlangen, Germany
| | - Sophia Sonnewald
- Division of Biochemistry, Friedrich Alexander University Erlangen-Nuremberg, 91054 Erlangen, Germany
| | - Tobias Bäuerle
- Preclinical Imaging Platform Erlangen, Institute of Radiology, University Hospital Erlangen, 91054 Erlangen, Germany
| | - Julio Vera
- Laboratory of Systems Tumor Immunology, Department of Dermatology, University Hospital Erlangen, 91054 Erlangen, Germany; and
| | - Georg Schett
- Department of Internal Medicine 3-Rheumatology and Immunology, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuremberg, 91054 Erlangen, Germany
| | - Aline Bozec
- Department of Internal Medicine 3-Rheumatology and Immunology, University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuremberg, 91054 Erlangen, Germany;
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71
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Moraes JL, Moraes AB, Aran V, Alves MR, Schluckbier L, Duarte M, Toscano E, Zamboni M, Sternberg C, de Moraes E, Lapa E Silva JR, Ferreira CG. Functional analysis of polymorphisms in the COX-2 gene and risk of lung cancer. Mol Clin Oncol 2017; 6:494-502. [PMID: 28413655 PMCID: PMC5374939 DOI: 10.3892/mco.2017.1167] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 01/31/2017] [Indexed: 12/20/2022] Open
Abstract
The enzyme cyclooxygenase 2 (COX-2) is known to be involved in tumorigenesis and metastasis in certain types of cancer. Nevertheless, the prognostic value of COX-2 overexpression and its polymorphisms in patients with non-small cell lung cancer (NSCLC) have yet to be fully elucidated. The aim of the present study was to investigate the association between the three most commonly studied COX-2 gene polymorphisms (-1195 G/A, -765 G/C and 8473 T/C) with COX-2 expression and lung cancer risk in a Brazilian cohort. In the present hospital based, case-control retrospective study, 104 patients with NSCLC and 202 cancer free control subjects were genotyped for -1195 G/A, -765 G/C and 8473 T/C polymorphisms using allelic discrimination with a reverse transcription quantitative polymerase chain reaction method. COX-2 mRNA expression was analyzed in surgically resected tumors from 34 patients with NSCLC. The results revealed that COX-2 expression levels were higher in tumor tissue compared with normal lung tissue. However, this overexpression of COX-2 was not associated with the patient outcome, and furthermore, none of the analyzed polymorphisms were associated with the risk of developing lung cancer, COX-2 overexpression, or the overall survival of the patients with NSCLC. Taken together, the findings described in the present study do not support a major role for COX-2 polymorphisms and COX-2 overexpression in lung carcinogenesis within the Brazilian population.
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Affiliation(s)
- Joyce L Moraes
- Clinical Research Division, Brazilian National Cancer Institute (INCA), Rio de Janeiro, Brazil
| | - Amanda B Moraes
- Clinical Research Division, Brazilian National Cancer Institute (INCA), Rio de Janeiro, Brazil
| | - Veronica Aran
- Clinical Research Division, Brazilian National Cancer Institute (INCA), Rio de Janeiro, Brazil
| | - Marcelo R Alves
- Evandro Chagas Clinical Research Institute, Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, Brazil
| | - Luciene Schluckbier
- Clinical Research Division, Brazilian National Cancer Institute (INCA), Rio de Janeiro, Brazil
| | - Mariana Duarte
- Clinical Research Division, Brazilian National Cancer Institute (INCA), Rio de Janeiro, Brazil
| | - Edson Toscano
- Department of Thoracic Surgery, Brazilian National Cancer Institute (INCA), Rio de Janeiro, Brazil
| | - Mauro Zamboni
- Department of Thoracic Surgery, Brazilian National Cancer Institute (INCA), Rio de Janeiro, Brazil
| | - Cinthya Sternberg
- Clinical Research Division, Brazilian National Cancer Institute (INCA), Rio de Janeiro, Brazil
| | - Emanuela de Moraes
- Clinical Research Division, Brazilian National Cancer Institute (INCA), Rio de Janeiro, Brazil
| | - José R Lapa E Silva
- Institute of Thoracic Medicine, Clementino Fraga Filho University Hospital, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Carlos Gil Ferreira
- National Clinical Cancer Research Network (RNPCC) SCTIE/MS, Rio de Janeiro, Brazil.,D'Or Institute for Research and Education (IDOR), Rio de Janeiro, Brazil
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72
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Benedetti E, d'Angelo M, Ammazzalorso A, Gravina GL, Laezza C, Antonosante A, Panella G, Cinque B, Cristiano L, Dhez AC, Astarita C, Galzio R, Cifone MG, Ippoliti R, Amoroso R, Di Cesare E, Giordano A, Cimini A. PPARα Antagonist AA452 Triggers Metabolic Reprogramming and Increases Sensitivity to Radiation Therapy in Human Glioblastoma Primary Cells. J Cell Physiol 2016; 232:1458-1466. [PMID: 27736000 DOI: 10.1002/jcp.25648] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 10/11/2016] [Indexed: 02/01/2023]
Abstract
Glioblastoma (GB) is the most common cancer in the brain and with an increasing incidence. Despite major advances in the field, there is no curative therapy for GB to date. Many solid tumors, including GB, experienced metabolic reprogramming in order to sustain uncontrolled proliferation, hypoxic conditions, and angiogenesis. PPARs, member of the steroid hormone receptor superfamily, are particularly involved in the control of energetic metabolism, particularly lipid metabolism, which has been reported deregulated in gliomas. PPARα was previously indicated by us as a potential therapeutic target for this neoplasm, due to the malignancy grade dependency of its expression, being particularly abundant in GB. In this work, we used a new PPARα antagonist on patient-derived GB primary cells, with particular focus on the effects on lipid metabolism and response to radiotherapy. The results obtained demonstrated that blocking PPARα results in cell death induction, increase of radiosensitivity, and decrease of migration. Therefore, AA452 is proposed as a new adjuvant for the gold standard therapies for GB, opening the possibility for preclinical and clinical trials for this class of compounds. J. Cell. Physiol. 232: 1458-1466, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Elisabetta Benedetti
- Depatment of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Michele d'Angelo
- Depatment of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | | | - Giovanni Luca Gravina
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Chiara Laezza
- Institute of Endocrinology and Experimental Oncology (IEOS), CNR, Naples, Italy
| | - Andrea Antonosante
- Depatment of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Gloria Panella
- Depatment of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Benedetta Cinque
- Depatment of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Loredana Cristiano
- Depatment of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Anne Chloè Dhez
- Depatment of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Carlo Astarita
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, Temple University, Philadelphia, Pennsylvania.,Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy
| | - Renato Galzio
- Depatment of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Maria Grazia Cifone
- Depatment of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Rodolfo Ippoliti
- Depatment of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy
| | - Rosa Amoroso
- Department of Pharmacy, G. d'Annunzio University, Chieti, Italy
| | - Ernesto Di Cesare
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - Antonio Giordano
- Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, Temple University, Philadelphia, Pennsylvania.,Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy
| | - Annamaria Cimini
- Depatment of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, Italy.,Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, Temple University, Philadelphia, Pennsylvania.,Gran Sasso National Laboratory (LNGS), National Institute for Nuclear Physics (INFN), Assergi, Italy
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73
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Chen HT, Sun D, Peng YC, Kao PH, Wu YL. Novel augmentation by bufalin of protein kinase C-induced cyclooxygenase-2 and IL-8 production in human breast cancer cells. Innate Immun 2016; 23:54-66. [DOI: 10.1177/1753425916676347] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Cyclooxygenase-2 (COX-2) and IL-8 are two inflammatory mediators induced by protein kinase C (PKC) via various stimuli. Both contribute significantly to cancer progression. Bufalin, a major active component of the traditional Chinese medicine Chan Su, is known to induce apoptosis in various cancer cells. This study clarifies the role and mechanism of bufalin action during PKC regulation of COX-2/IL-8 expression and investigates the associated impact on breast cancer. Using MB-231 breast cancer cells, bufalin augments PKC induction of COX-2/IL-8 at both the protein and mRNA levels, and the production of prostaglandin E2 (PGE2) and IL-8. The MAPK and NF-κB pathways are involved in both the PKC-mediated and bufalin-promoted PKC regulation of COX-2/IL-8 production. Bufalin increases PKC-induced MAPKs phosphorylation and NF-κB nuclear translocation. PGE2 stimulates the proliferation/migration of breast cancer cells. Furthermore, PKC-induced matrix metalloproteinase 3 expression is enhanced by bufalin. Bufalin significantly enhances breast cancer xenograft growth, which is accompanied by an elevation in COX-2/IL-8 expression. In conclusion, bufalin seems to promote the inflammatory response in vitro and in vivo, and this occurs, at least in part, by targeting the MAPK and NF-κB pathways, which then enhances the growth of breast cancer cells.
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Affiliation(s)
- Hsiao-Ting Chen
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - David Sun
- Department of Obstetrics and Gynecology, Cheng Hsin General Hospital, Taipei, Taiwan
| | - Yen-Chun Peng
- Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Pu-Hong Kao
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Yuh-Lin Wu
- Department of Physiology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
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74
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Ferrari D, Speciale A, Cristani M, Fratantonio D, Molonia MS, Ranaldi G, Saija A, Cimino F. Cyanidin-3-O-glucoside inhibits NF-kB signalling in intestinal epithelial cells exposed to TNF-α and exerts protective effects via Nrf2 pathway activation. Toxicol Lett 2016; 264:51-58. [PMID: 27793764 DOI: 10.1016/j.toxlet.2016.10.014] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 10/21/2016] [Accepted: 10/24/2016] [Indexed: 11/29/2022]
Abstract
Chronic intestinal inflammatory disorders, such as Inflammatory Bowel Diseases (IBDs), are characterized by excessive release of proinflammatory mediators, intestinal barrier dysfunction and excessive activation of NF-kB cascade. Previous studies shown that TNF-α plays a central role in intestinal inflammation of IBDs and supported beneficial effects of flavonoids against chronic inflammatory diseases. In this study, we employed an in vitro model of acute intestinal inflammation using intestinal Caco-2 cells exposed to TNF-α. The protective effects of cyanidin-3-glucoside (C3G), an anthocyanin widely distributed in mediterranean diet, were then evaluated. Caco-2 cells exposure to TNF-α activated NF-kB proinflammatory pathway and induced IL6 and COX-2 expression. Cells pretreatment for 24h with C3G (20-40μM) prevented TNF-α-induced changes, and improved intracellular redox status. Our results demonstrated that C3G, also without any kind of stimulus, increased the translocation of the transcription factor Nrf2 into the nucleus so activating antioxidant and detoxifying genes. In conclusion, C3G exhibited protective effects through the inhibition of NF-kB signalling in Caco-2 cells and these beneficial effects appear to be due to its ability to activate cellular protective responses modulated by Nrf2. These data suggest that anthocyanins could contribute, as complementary or preventive approaches, to the management of chronic inflammatory diseases.
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Affiliation(s)
- Daniela Ferrari
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy.
| | - Antonio Speciale
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy.
| | - Mariateresa Cristani
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy.
| | - Deborah Fratantonio
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy.
| | - Maria Sofia Molonia
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy.
| | - Giulia Ranaldi
- Council for Agricultural Research and Economics, Food and Nutrition Research Centre, (CREA - NUT), Rome, Italy.
| | - Antonella Saija
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy.
| | - Francesco Cimino
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy.
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75
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Ren H, Shi X, Li Y. Reduction of p38 mitogen-activated protein kinase and cyclooxygenase-2 signaling by isoflurane inhibits proliferation and apoptosis evasion in human papillomavirus-infected laryngeal papillomas. Exp Ther Med 2016; 12:3425-3432. [PMID: 27882174 DOI: 10.3892/etm.2016.3776] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 08/16/2016] [Indexed: 12/23/2022] Open
Abstract
Human laryngeal papilloma (LP) is a human papillomavirus-induced hyperplastic tumor of the respiratory tract, which is characterized by rapid growth and apoptosis resistance. Isoflurane (ISO) inhibits proliferation and elicits apoptosis in cancer cells. The results of the present study found that the mRNA and protein levels of cyclooxygenase-2 (COX2) were higher in LP tissues than in normal laryngeal samples, and prostaglandin E2 (PGE2) production was increased in LP cells, as determined by quantitative polymerase chain reaction, western blot and radioimmunoassay analyses. Notably, the increase in COX2 and PGE2 levels was significantly abrogated in the ISO-treated LP cells. The inhibitory effects of ISO on COX2 expression and activity depended on the inactivation of p38 mitogen-activated protein kinase (MAPK) in LP cells. By inhibiting the COX2 activity of LP cells, ISO treatment markedly suppressed cell viability and proliferation, as determined using Cell Counting Kit-8, flow cytometry and 5-ethynyl-20-deoxyuridine incorporation assays. Furthermore, ISO treatment promoted cell apoptosis, as demonstrated by flow cytometry, nucleosomal fragmentation and caspase-3 activity assays. Collectively, the present results suggest that COX2 is critical in the progression of LP, and ISO is a potential agent for LP therapy by impeding p38 MAPK/COX2 signaling.
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Affiliation(s)
- Hongbo Ren
- Department of Otolaryngology, Children's Hospital of Zhengzhou, Zhengzhou, Henan 450000, P.R. China
| | - Xiaojuan Shi
- Department of Pediatrics, Women and Infants Hospital of Zhengzhou, Zhengzhou, Henan 450012, P.R. China
| | - Ying Li
- Department of Otolaryngology, Children's Hospital of Zhengzhou, Zhengzhou, Henan 450000, P.R. China
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76
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Mena SJ, Manosalva C, Carretta MD, Teuber S, Olmo I, Burgos RA, Hidalgo MA. Differential free fatty acid receptor-1 (FFAR1/GPR40) signalling is associated with gene expression or gelatinase granule release in bovine neutrophils. Innate Immun 2016; 22:479-89. [DOI: 10.1177/1753425916656765] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 06/06/2016] [Indexed: 12/31/2022] Open
Abstract
Fatty acids have been recognized as regulators of immune function in addition to their known metabolic role. Long-chain fatty acids bind free fatty acid receptor (FFAR)-1/GPR40, which is expressed on bovine neutrophils, and increase responses such as granule release and gene expression. In this study, we investigated the molecular mechanisms governing the up-regulation of cyclooxygenase-2 (COX-2) and IL-8, as well as matrix metalloproteinase (MMP)-9 granule release in FFAR1/GPR40 agonist-stimulated neutrophils. Our results showed that natural (oleic and linoleic acid) and synthetic (GW9508) FFAR1/GPR40 agonists increased ERK1/2, p38 MAPK and Akt phosphorylation, and that the FFAR1/GPR40 antagonist GW1100 reduced these responses. We evaluated the levels of IκBα, a component of the classical activation pathway of the transcription factor NF-κB, and we observed IκBα reduction after stimulation with FFAR1/GPR40 agonists, an effect that was inhibited by GW1100 or the inhibitors UO126, SB203580 or LY294002. FFAR1/GPR40 agonists increased COX-2 and IL-8 expression, which was inhibited by GW1100 and an NF-κB inhibitor. Finally, the FFAR1/GPR40 agonist-induced MMP-9 granule release was reduced by GW1100 and UO126. In conclusion, FFAR1/GPR40 agonists differentially stimulate neutrophil functions; COX-2 and IL-8 are expressed after FFAR1/GPR40 activation via NF-κB, IκBα reduction is FFAR1/GPR40- and PI3K/MAPK-dependent, and MMP-9 granule release is FFAR1/GPR40- and ERK1/2-dependent.
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Affiliation(s)
- Sandra J Mena
- Laboratory of Molecular Pharmacology, Institute of Pharmacology, Faculty of Veterinary Science, Universidad Austral de Chile, Valdivia, Chile
- Department of Biology, Universidad de Nariño, Pasto, Colombia
| | - Carolina Manosalva
- Laboratory of Molecular Pharmacology, Institute of Pharmacology, Faculty of Veterinary Science, Universidad Austral de Chile, Valdivia, Chile
- Institute of Pharmacy, Faculty of Sciences, Universidad Austral de Chile, Valdivia, Chile
| | - Maria D Carretta
- Laboratory of Molecular Pharmacology, Institute of Pharmacology, Faculty of Veterinary Science, Universidad Austral de Chile, Valdivia, Chile
| | - Stefanie Teuber
- Laboratory of Molecular Pharmacology, Institute of Pharmacology, Faculty of Veterinary Science, Universidad Austral de Chile, Valdivia, Chile
| | - Iván Olmo
- Laboratory of Molecular Pharmacology, Institute of Pharmacology, Faculty of Veterinary Science, Universidad Austral de Chile, Valdivia, Chile
| | - Rafael A Burgos
- Laboratory of Molecular Pharmacology, Institute of Pharmacology, Faculty of Veterinary Science, Universidad Austral de Chile, Valdivia, Chile
| | - Maria A Hidalgo
- Laboratory of Molecular Pharmacology, Institute of Pharmacology, Faculty of Veterinary Science, Universidad Austral de Chile, Valdivia, Chile
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77
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Dos-Santos-Pereira M, da-Silva CA, Guimarães FS, Del-Bel E. Co-administration of cannabidiol and capsazepine reduces L-DOPA-induced dyskinesia in mice: Possible mechanism of action. Neurobiol Dis 2016; 94:179-95. [PMID: 27373843 DOI: 10.1016/j.nbd.2016.06.013] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Revised: 06/20/2016] [Accepted: 06/22/2016] [Indexed: 12/22/2022] Open
Affiliation(s)
- Maurício Dos-Santos-Pereira
- University of São Paulo (USP), School of Odontology of Ribeirão Preto, Department of Morphology, Physiology and Basic Pathology, Av. Café S/N, 14040-904 Ribeirão Preto, SP, Brazil; USP, Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), Brazil; USP, Medical School of Ribeirão Preto, Department of Physiology, Av. Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil
| | - Célia Aparecida da-Silva
- University of São Paulo (USP), School of Odontology of Ribeirão Preto, Department of Morphology, Physiology and Basic Pathology, Av. Café S/N, 14040-904 Ribeirão Preto, SP, Brazil; USP, Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), Brazil
| | - Francisco Silveira Guimarães
- USP, Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), Brazil; USP, Medical School of Ribeirão Preto, Department of Pharmacology, Av. Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil
| | - Elaine Del-Bel
- University of São Paulo (USP), School of Odontology of Ribeirão Preto, Department of Morphology, Physiology and Basic Pathology, Av. Café S/N, 14040-904 Ribeirão Preto, SP, Brazil; USP, Center for Interdisciplinary Research on Applied Neurosciences (NAPNA), Brazil; USP, Medical School of Ribeirão Preto, Department of Physiology, Av. Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil; USP, Medical School of Ribeirão Preto, Department of Pharmacology, Av. Bandeirantes 3900, 14049-900 Ribeirão Preto, SP, Brazil.
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78
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Lee CM, Gupta S, Wang J, Johnson EM, Crofford LJ, Marshall JC, Kapoor M, Hu J. Epithelium-specific Ets transcription factor-1 acts as a negative regulator of cyclooxygenase-2 in human rheumatoid arthritis synovial fibroblasts. Cell Biosci 2016; 6:43. [PMID: 27313839 PMCID: PMC4910355 DOI: 10.1186/s13578-016-0105-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 05/25/2016] [Indexed: 01/21/2023] Open
Abstract
Background Rheumatoid arthritis (RA) is characterized by excessive synovial inflammation. Cyclooxygenase-2 (COX-2) is an enzyme that catalyzes the conversion of arachidonic acid (AA) into prostaglandins. Epithelium-specific Ets transcription factor-1 (ESE-1) was previously demonstrated to upregulate COX-2 in co-operation with nuclear factor kappa B (NFκB) in macrophages and chondrocytes. However, the role of ESE-1 in RA pathology has remained unclear. In this study, we aimed to elucidate the relationship between ESE-1 and COX-2 in RA synovial fibroblasts (RASFs) using a HD-Ad-mediated knockdown approach. Results ESE-1 and COX-2 were induced by IL-1β in RASFs that corresponded with an increase in PGE2. Endogenous levels of ESE-1 and COX-2 in human RASFs were analyzed by RT-qPCR and Western blot, and PGE2 was quantified using competitive ELISA. Interestingly, knockdown of ESE-1 using helper-dependent adenovirus (HD-Ad) led to a significant upregulation of COX-2 at a later phase of IL-1β stimulation. Examination of ESE-1 intracellular localization by nuclear fractionation revealed that ESE-1 was localized in the nucleus, occupying disparate cellular compartments to NFκB when COX-2 was increased. To confirm the ESE-1-COX-2 relationship in other cellular systems, COX-2 was also measured in SW982 synovial sarcoma cell line and ESE-1 knockout (KO) murine macrophages. Similarly, knockdown of ESE-1 transcriptionally upregulated COX-2 in SW982 and ESE-1 KO murine macrophages, suggesting that ESE-1 may be involved in the resolution of inflammation. Conclusion ESE-1 acts as a negative regulator of COX-2 in human RASFs and its effect on COX-2 is NFκB-independent. Electronic supplementary material The online version of this article (doi:10.1186/s13578-016-0105-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Chan-Mi Lee
- SickKids Research Institute, Program in Physiology and Experimental Medicine, The Hospital for Sick Children, Peter Gilgan Centre for Research and Learning, 9th floor, 686 Bay Street, Toronto, ON M5G 0A4 Canada ; Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, Toronto, ON M5S 1A8 Canada
| | - Sahil Gupta
- The Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael's Hospital, 209 Victoria Street, Toronto, ON M5B 1T8 Canada ; Institute of Medical Science, Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, ON M5S 1A8 Canada
| | - Jiafeng Wang
- The Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael's Hospital, 209 Victoria Street, Toronto, ON M5B 1T8 Canada ; Department of Anesthesiology and Intensive Care, The Second Military Medical University, Changhai Hospital, Shanghai, 200433 China
| | - Elizabeth M Johnson
- Department of Medicine, Division of Rheumatology and Immunology, School of Medicine, Vanderbilt University, 1161 21st Ave S, MCN T-3113, Nashville, TN 37232 USA
| | - Leslie J Crofford
- Department of Medicine, Division of Rheumatology and Immunology, School of Medicine, Vanderbilt University, 1161 21st Ave S, MCN T-3113, Nashville, TN 37232 USA
| | - John C Marshall
- The Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael's Hospital, 209 Victoria Street, Toronto, ON M5B 1T8 Canada ; Institute of Medical Science, Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, ON M5S 1A8 Canada ; Department of Surgery, St. Michael's Hospital, University of Toronto, 30 Bond Street, Toronto, ON M5B 1W8 Canada
| | - Mohit Kapoor
- Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, Toronto, ON M5S 1A8 Canada ; Division of Genetics and Development, Toronto Western Research Institute, Toronto Western Hospital, University Health Network (UHN), 60 Leonard Avenue, Toronto, ON M5T 2S8 Canada
| | - Jim Hu
- SickKids Research Institute, Program in Physiology and Experimental Medicine, The Hospital for Sick Children, Peter Gilgan Centre for Research and Learning, 9th floor, 686 Bay Street, Toronto, ON M5G 0A4 Canada ; Laboratory Medicine and Pathobiology, University of Toronto, 1 King's College Circle, Toronto, ON M5S 1A8 Canada ; Institute of Medical Science, Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, ON M5S 1A8 Canada
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79
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Jang SA, Lee S, Sohn EH, Yang J, Park DW, Jeong YJ, Kim I, Kwon JE, Song HS, Cho YM, Meng X, Koo HJ, Kang SC. Cynanchum wilfordii Radix attenuates liver fat accumulation and damage by suppressing hepatic cyclooxygenase-2 and mitogen-activated protein kinase in mice fed with a high-fat and high-fructose diet. Nutr Res 2016; 36:914-924. [PMID: 27632911 DOI: 10.1016/j.nutres.2016.06.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 06/03/2016] [Accepted: 06/08/2016] [Indexed: 02/08/2023]
Abstract
Excessive consumption of fat and fructose augments the pathological progression of nonalcoholic fatty liver disease through hepatic fibrosis, inflammation, and hepatic de novo lipogenesis. We hypothesized that supplementation with Cynanchum wilfordii extract (CWE) decreases fat accumulation in the liver by suppressing cyclooxygenase-2 (COX-2), the nuclear translocation of nuclear factor κB (NF-κB), and p38 mitogen-activated protein kinase (MAPK). The beneficial effect of CWE was evaluated in a murine model of nonalcoholic fatty liver disease. Mice were fed either a normal diet or an atherogenic diet with fructose (ATHFR) in the presence or absence of CWE (50, 100, or 200 mg/kg; n=6/group). Treatment with ATHFR induced a hepatosplenomegaly-like condition (increased liver and spleen weight); this pathological change was attenuated in the presence of CWE. The ATHFR group exhibited impaired liver function, as evidenced by increased blood levels of glutamic oxaloacetic transaminase and glutamic pyruvic transaminase, fat accumulation in the liver, and lipid profiles. Supplementation of CWE (100 and 200 mg/kg, P<.05) ameliorated these impaired liver functions. Atherogenic diet with fructose increased the protein levels of COX-2 and p38 MAPK, as well as the nuclear translocation of NF-κB. These signaling pathways, which are associated with the inflammatory response, were markedly suppressed after CWE treatment (100 and 200 mg/kg). In summary, CWE supplementation reduced high-fat and high-fructose diet-induced fat accumulation and damage in the liver by suppressing COX-2, NF-κB, and p38 MAPK.
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Affiliation(s)
- Seon-A Jang
- Department of Oriental Medicine Biotechnology, College of Life Sciences, Kyung Hee University, Yongin 17104, Korea
| | - SungRyul Lee
- College of Medicine, Cardiovascular and Metabolic Disease Center and Department of Health Sciences and Technology, Graduate School of Inje University, Inje University, Busan 614-735, Korea
| | - Eun-Hwa Sohn
- Department of Herbal Medicine Resources, Kangwon National University, Samcheok 245-710, Korea
| | - Jaehyuk Yang
- Department of Medicinal and Industrial Crops, Korea National College of Agriculture and Fisheries, Jeonju 54874, Korea
| | - Dae Won Park
- Department of Oriental Medicine Biotechnology, College of Life Sciences, Kyung Hee University, Yongin 17104, Korea
| | - Yong Joon Jeong
- Department of Oriental Medicine Biotechnology, College of Life Sciences, Kyung Hee University, Yongin 17104, Korea
| | - Inhye Kim
- Department of Oriental Medicine Biotechnology, College of Life Sciences, Kyung Hee University, Yongin 17104, Korea
| | - Jung Eun Kwon
- Department of Oriental Medicine Biotechnology, College of Life Sciences, Kyung Hee University, Yongin 17104, Korea
| | - Hae Seong Song
- Department of Oriental Medicine Biotechnology, College of Life Sciences, Kyung Hee University, Yongin 17104, Korea
| | - Young Mi Cho
- Department of Oriental Medicine Biotechnology, College of Life Sciences, Kyung Hee University, Yongin 17104, Korea
| | - Xue Meng
- Department of Oriental Medicine Biotechnology, College of Life Sciences, Kyung Hee University, Yongin 17104, Korea
| | - Hyun Jung Koo
- Department of Medicinal and Industrial Crops, Korea National College of Agriculture and Fisheries, Jeonju 54874, Korea.
| | - Se Chan Kang
- Department of Oriental Medicine Biotechnology, College of Life Sciences, Kyung Hee University, Yongin 17104, Korea.
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80
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Liu W, Yao H, Zhao W, Shi Y, Zhang Z, Xu S. Selenoprotein W was Correlated with the Protective Effect of Selenium on Chicken Myocardial Cells from Oxidative Damage. Biol Trace Elem Res 2016; 171:419-426. [PMID: 26463750 DOI: 10.1007/s12011-015-0529-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2015] [Accepted: 09/29/2015] [Indexed: 12/14/2022]
Abstract
Selenium (Se) mainly performs its function through Se-containing proteins. Selenoprotein W (SelW), one member of the selenoprotein family, plays important roles in the normal function of the heart. To investigate the possible relationship between Se and SelW for the regulation of oxidative damage in chicken embryo myocardial cells, we treated myocardial cells with Se and H2O2. Then, the levels of lactate dehydrogenase (LDH) and 3,4-methylenedioxyamphetamine in the culture media, levels of SelW, inflammatory genes NF-κB, tumor necrosis factor (TNF)-α, p53, and the cell cycle were analyzed. Furthermore, the correlation between SelW and the levels of these factors was determined. The results indicated that Se treatment increased the expression of SelW (P < 0.05) and caused a downregulation of p53, NF-κB, and TNF-α (P < 0.05). In contrast, H2O2 increased the expression of p53, NF-κB, TNF-α, and LDH (P < 0.05) and induced early cell apoptosis, which was alleviated by treatment with Se. In addition, SelW had a positive correlation with the levels of inflammatory genes investigated. Taken together, our findings suggested that SelW is sensitive to Se levels and oxidative stress, and may play a role in the protective function of Se against oxidative damage and inflammation in chicken myocardial cells.
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Affiliation(s)
- Wei Liu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
- The Key Laboratory of Myocardial Ischemia, Ministry of Education, Harbin Medical University, Harbin, Heilongjiang Province, People's Republic of China
| | - Haidong Yao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Wenchao Zhao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Yuguang Shi
- The Scientific Research Center, Ministry of Education, The 2nd Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, People's Republic of China
| | - Ziwei Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Shiwen Xu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
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81
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Moreira V, Teixeira C, Borges da Silva H, D'Império Lima MR, Dos-Santos MC. The role of TLR2 in the acute inflammatory response induced by Bothrops atrox snake venom. Toxicon 2016; 118:121-8. [PMID: 27109323 DOI: 10.1016/j.toxicon.2016.04.042] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 04/16/2016] [Accepted: 04/20/2016] [Indexed: 01/04/2023]
Abstract
Envenomation by snakes of the species Bothrops atrox induces local and systemic effects. Local effects include drastic tissue damage and a marked inflammatory response as a result of the synthesis and release of a variety of protein and lipid mediators. Toll-like receptor (TLR) signaling pathways can play an important role in this response, leading to synthesis of these inflammatory mediators. This study investigated the influence of TLR2 on the acute inflammatory response induced by Bothrops atrox venom. Wild-type C57BL/6 mice (WT) and TLR2 gene knockout mice (TLR2(-/-)) were injected with Bothrops atrox venom (BaV), and the following responses to the venom were assessed in peritoneal exudate: leukocyte accumulation; release of mediators, including CCL-2, IL-10, IL-1β, IL-6 and LTB4; protein expression of COX-1 and COX-2; and quantification of their products PGE2 and TXA2. After injection with BaV, the TLR2(-/-) mice (TLR2(-/-)BaV) had higher levels of IL-6 and CCL-2 than WT animals kept under the same conditions (WTBaV), together with an accumulation of polymorphonuclear leukocytes (PMNs), inhibition of IL-1β and LTB4 and reduced mononuclear leukocyte influx. However, no significant differences in COX-2 protein expression or PGE2, TXA2 and IL-10 production between the TLR2(-/-)BaV and WTBav animals were observed. Together, these results indicate that the signaling pathway activated by TLR2 acts by modulating the induced inflammatory response to BaV through the direct action of venom-associated molecular patterns (VAMPs) or indirectly by forming damage-associated molecular patterns (DAMPs) and that this may have important therapeutic implications.
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Affiliation(s)
- Vanessa Moreira
- Pharmacology Laboratory, Butantan Institute, São Paulo, SP, Brazil
| | | | - Henrique Borges da Silva
- Immunology Department, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | | | - Maria Cristina Dos-Santos
- Immunochemistry Laboratory, Parasitology Department, Institute of Biological Sciences, Federal University of Amazonas, Manaus, AM, Brazil.
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82
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Dong L, Zou H, Yuan C, Hong YH, Kuklev DV, Smith WL. Different Fatty Acids Compete with Arachidonic Acid for Binding to the Allosteric or Catalytic Subunits of Cyclooxygenases to Regulate Prostanoid Synthesis. J Biol Chem 2015; 291:4069-78. [PMID: 26703471 DOI: 10.1074/jbc.m115.698001] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Indexed: 12/20/2022] Open
Abstract
Prostaglandin endoperoxide H synthases (PGHSs), also called cyclooxygenases (COXs), convert arachidonic acid (AA) to PGH2. PGHS-1 and PGHS-2 are conformational heterodimers, each composed of an (Eallo) and a catalytic (Ecat) monomer. Previous studies suggested that the binding to Eallo of saturated or monounsaturated fatty acids (FAs) that are not COX substrates differentially regulate PGHS-1 versus PGHS-2. Here, we substantiate and expand this concept to include polyunsaturated FAs known to modulate COX activities. Non-substrate FAs like palmitic acid bind Eallo of PGHSs stimulating human (hu) PGHS-2 but inhibiting huPGHS-1. We find the maximal effects of non-substrate FAs on both huPGHSs occurring at the same physiologically relevant FA/AA ratio of ∼20. This inverse allosteric regulation likely underlies the ability of PGHS-2 to operate at low AA concentrations, when PGHS-1 is effectively latent. Unlike FAs tested previously, we observe that C-22 FAs, including ω-3 fish oil FAs, have higher affinities for Ecat than Eallo subunits of PGHSs. Curiously, C-20 ω-3 eicosapentaenoate preferentially binds Ecat of huPGHS-1 but Eallo of huPGHS-2. PGE2 production decreases 50% when fish oil consumption produces tissue EPA/AA ratios of ≥0.2. However, 50% inhibition of huPGHS-1 itself is only seen with ω-3 FA/AA ratios of ≥5.0. This suggests that fish oil-enriched diets disfavor AA oxygenation by altering the composition of the FA pool in which PGHS-1 functions. The distinctive binding specificities of PGHS subunits permit different combinations of non-esterified FAs, which can be manipulated dietarily, to regulate AA binding to Eallo and/or Ecat thereby controlling COX activities.
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Affiliation(s)
- Liang Dong
- From the Department of Biological Chemistry, University of Michigan, Ann Arbor, Michigan 48109
| | - Hechang Zou
- From the Department of Biological Chemistry, University of Michigan, Ann Arbor, Michigan 48109
| | - Chong Yuan
- From the Department of Biological Chemistry, University of Michigan, Ann Arbor, Michigan 48109
| | - Yu H Hong
- From the Department of Biological Chemistry, University of Michigan, Ann Arbor, Michigan 48109
| | - Dmitry V Kuklev
- From the Department of Biological Chemistry, University of Michigan, Ann Arbor, Michigan 48109
| | - William L Smith
- From the Department of Biological Chemistry, University of Michigan, Ann Arbor, Michigan 48109
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83
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Broekgaarden M, Weijer R, van Gulik TM, Hamblin MR, Heger M. Tumor cell survival pathways activated by photodynamic therapy: a molecular basis for pharmacological inhibition strategies. Cancer Metastasis Rev 2015; 34:643-90. [PMID: 26516076 PMCID: PMC4661210 DOI: 10.1007/s10555-015-9588-7] [Citation(s) in RCA: 162] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Photodynamic therapy (PDT) has emerged as a promising alternative to conventional cancer therapies such as surgery, chemotherapy, and radiotherapy. PDT comprises the administration of a photosensitizer, its accumulation in tumor tissue, and subsequent irradiation of the photosensitizer-loaded tumor, leading to the localized photoproduction of reactive oxygen species (ROS). The resulting oxidative damage ultimately culminates in tumor cell death, vascular shutdown, induction of an antitumor immune response, and the consequent destruction of the tumor. However, the ROS produced by PDT also triggers a stress response that, as part of a cell survival mechanism, helps cancer cells to cope with the PDT-induced oxidative stress and cell damage. These survival pathways are mediated by the transcription factors activator protein 1 (AP-1), nuclear factor E2-related factor 2 (NRF2), hypoxia-inducible factor 1 (HIF-1), nuclear factor κB (NF-κB), and those that mediate the proteotoxic stress response. The survival pathways are believed to render some types of cancer recalcitrant to PDT and alter the tumor microenvironment in favor of tumor survival. In this review, the molecular mechanisms are elucidated that occur post-PDT to mediate cancer cell survival, on the basis of which pharmacological interventions are proposed. Specifically, pharmaceutical inhibitors of the molecular regulators of each survival pathway are addressed. The ultimate aim is to facilitate the development of adjuvant intervention strategies to improve PDT efficacy in recalcitrant solid tumors.
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Affiliation(s)
- Mans Broekgaarden
- Department of Experimental Surgery, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Ruud Weijer
- Department of Experimental Surgery, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Thomas M van Gulik
- Department of Experimental Surgery, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Michael R Hamblin
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, USA
- Department of Dermatology, Harvard Medical School, Boston, MA, USA
- Harvard-MIT Division of Health Sciences & Technology, Cambridge, MA, USA
| | - Michal Heger
- Department of Experimental Surgery, Academic Medical Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.
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84
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Popli P, Sirohi VK, Manohar M, Shukla V, Kaushal JB, Gupta K, Dwivedi A. Regulation of cyclooxygenase-2 expression in rat oviductal epithelial cells: Evidence for involvement of GPR30/Src kinase-mediated EGFR signaling. J Steroid Biochem Mol Biol 2015; 154:130-41. [PMID: 26241029 DOI: 10.1016/j.jsbmb.2015.07.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 07/13/2015] [Accepted: 07/29/2015] [Indexed: 11/26/2022]
Abstract
The oviduct plays a crucial role in female reproduction by regulating gamete transport, providing a specific microenvironment for fertilization and early embryonic development. Cyclooxygenase (COX)-derived prostaglandins play essential role in carrying out these oviduct-specific functions. Estrogen upregulates COX-2 expression in rat oviduct; however, the mechanisms responsible for regulation of COX-2 expression in rat oviductal epithelial cells (OECs) remain unclear. In the present study, we proposed that estrogen induces COX-2 expression via G-protein coupled receptor i.e., GPR30 in OECs. To investigate this hypothesis, we examined the effects of E2-BSA, ICI 182,780, GPR30 agonist and GPR30 antagonist on COX-2 expression and explored potential signaling pathway leading to COX-2 expression. Co-localization experiments revealed GPR30 to be primarily located in the peri-nuclear space, which was also the site of E2-BSA-fluorescein isothiocyanate (E2-BSA-FITC) binding. The E2-BSA induced-COX-2 and prostaglandin release were subjected to regulation by both EGFR and PI3K signaling as inhibitors of c-Src kinase (PP2), EGFR (EGFR inhibitor) and PI-3 kinase (LY294002) attenuated E2-BSA mediated effect. These results suggest that EGFR transactivation leading to activation of PI-3K/Akt pathway participates in COX-2 expression in rat OECs. Interestingly, E2-BSA induced COX-2 expression and subsequent prostaglandin release were abolished by NF-κB inhibitor. In addition, E2-BSA induced the nuclear translocation of p65-NF-κB and up-regulated the NF-κB promoter activity in rat OECs. Taken together, results demonstrated that E2-BSA induced the COX-2 expression and consequent PGE2 and PGF2α release in rat OECs. These effects are mediated through GPR30-derived EGFR transactivation and PI-3K/Akt cascade leading to NF-κB activation.
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Affiliation(s)
- Pooja Popli
- Division of Endocrinology, CSIR-Central Drug Research Institute, Lucknow 226031, UP, India
| | - Vijay Kumar Sirohi
- Division of Endocrinology, CSIR-Central Drug Research Institute, Lucknow 226031, UP, India
| | - Murli Manohar
- Division of Endocrinology, CSIR-Central Drug Research Institute, Lucknow 226031, UP, India
| | - Vinay Shukla
- Division of Endocrinology, CSIR-Central Drug Research Institute, Lucknow 226031, UP, India
| | - Jyoti Bala Kaushal
- Division of Endocrinology, CSIR-Central Drug Research Institute, Lucknow 226031, UP, India
| | - Kanchan Gupta
- Division of Endocrinology, CSIR-Central Drug Research Institute, Lucknow 226031, UP, India
| | - Anila Dwivedi
- Division of Endocrinology, CSIR-Central Drug Research Institute, Lucknow 226031, UP, India.
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85
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Xing M, Zhao P, Guo G, Guo Y, Zhang K, Tian L, He Y, Chai H, Zhang W. Inflammatory Factor Alterations in the Gastrointestinal Tract of Cocks Overexposed to Arsenic Trioxide. Biol Trace Elem Res 2015; 167:288-99. [PMID: 25784090 DOI: 10.1007/s12011-015-0305-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Accepted: 03/05/2015] [Indexed: 10/23/2022]
Abstract
Exposure of people and animals to arsenic (As) is a global public health concern because As is widely distributed and associated with numerous adverse effects. As is a poisonous metalloid and arsenic trioxide (As2O3) is a form of As. Thus far, there have been very few reports on the inflammatory factor alterations of the gastrointestinal tract in birds exposed to As2O3. To investigate the possible correlation of As2O3 with inflammatory injury induced by an arsenic-supplemented diet in birds, 72 1-day-old male Hy-line cocks were selected and randomly divided into four groups. They were fed with either a commercial diet or an arsenic-supplemented diet containing 7.5, 15, and 30 mg/kg As2O3. The experiment lasted for 90 days, and samples of gizzard, glandular stomach, duodenum, jejunum, ileum, cecum, and rectum were collected at days 30, 60, and 90 of the experiment period. The inflammation-related genes were determined, including NF-κB, iNOS, COX-2, PTGEs, and TNF-α. The connection between arsenic dosage and inflammation-related genes was assessed. The content of inducible NO synthase (iNOS) was measured by Western blot of the samples. The results showed that arsenic supplementation increased the mRNA expression levels of inflammation-related genes in the gastrointestinal tract of cocks at different time points (p < 0.05). Moreover, the expression of the tissue and organ injury-related gene iNOS was upregulated (p < 0.05). These data suggest that As induces the inflammatory response and may trigger digestive function regression of the gastrointestinal tract by affecting inflammation-related genes and iNOS in cocks. This study offers some information on the mechanism of gastrointestinal tract inflammatory injury and iNOS expression level alterations induced by arseniasis.
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Affiliation(s)
- Mingwei Xing
- College of Wildlife Resources, Northeast Forestry University, Harbin, Heilongjiang Province, 150040, China,
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86
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Lokwani D, Azad R, Sarkate A, Reddanna P, Shinde D. Structure Based Library Design (SBLD) for new 1,4-dihydropyrimidine scaffold as simultaneous COX-1/COX-2 and 5-LOX inhibitors. Bioorg Med Chem 2015; 23:4533-4543. [DOI: 10.1016/j.bmc.2015.06.008] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Revised: 06/02/2015] [Accepted: 06/03/2015] [Indexed: 12/27/2022]
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87
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Yu SM, Kim SJ. DNA-hypomethylating agent, 5'-azacytidine, induces cyclooxygenase-2 expression via the PI3-kinase/Akt and extracellular signal-regulated kinase-1/2 pathways in human HT1080 fibrosarcoma cells. Int J Oncol 2015; 47:1469-75. [PMID: 26238650 DOI: 10.3892/ijo.2015.3110] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 07/17/2015] [Indexed: 11/06/2022] Open
Abstract
The cytosine analogue 5'-azacytidine (5'-aza) induces DNA hypomethylation by inhibiting DNA methyltransferase. In clinical trials, 5'-aza is widely used in epigenetic anticancer treatments. Accumulated evidence shows that cyclooxygenase-2 (COX-2) is overexpressed in various cancers, indicating that it may play a critical role in carcinogenesis. However, few studies have been performed to explore the molecular mechanism underlying the increased COX-2 expression. Therefore, we tested the hypothesis that 5'-aza regulates COX-2 expression and prostaglandin E2 (PGE2) production. The human fibrosarcoma cell line HT1080, was treated with various concentrations of 5'-aza for different time periods. Protein expressions of COX-2, DNA (cytosine-5)-methyltransferase 1 (DNMT1), pAkt, Akt, extracellular signal-regulated kinase (ERK), and phosphorylated ERK (pERK) were determined using western blot analysis, and COX-2 mRNA expression was determined using RT-PCR. PGE2 production was evaluated using the PGE2 assay kit. The localization and expression of COX-2 were determined using immunofluorescence staining. Treatment with 5'-aza induces protein and mRNA expression of COX-2. We also observed that 5'-aza-induced COX-2 expression and PGE2 production were inhibited by S-adenosylmethionine (SAM), a methyl donor. Treatment with 5'-aza phosphorylates PI3-kinase/Akt and ERK-1/2; inhibition of these pathways by LY294002, an inhibitor of PI3-kinase/Akt, or PD98059, an inhibitor of ERK-1/2, respectively, prevents 5'-aza-induced COX-2 expression and PGE2 production. Overall, these observations indicate that the hypomethylating agent 5'-aza modulates COX-2 expression via the PI3-kinase/Akt and ERK-1/2 pathways in human HT1080 fibrosarcoma cells.
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Affiliation(s)
- Seon-Mi Yu
- Department of Biological Sciences, College of Natural Sciences, Kongju National University, Gongju 182, Republic of Korea
| | - Song-Ja Kim
- Department of Biological Sciences, College of Natural Sciences, Kongju National University, Gongju 182, Republic of Korea
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88
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Korbecki J, Baranowska-Bosiacka I, Gutowska I, Chlubek D. Vanadium Compounds as Pro-Inflammatory Agents: Effects on Cyclooxygenases. Int J Mol Sci 2015; 16:12648-68. [PMID: 26053397 PMCID: PMC4490466 DOI: 10.3390/ijms160612648] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 05/12/2015] [Accepted: 05/19/2015] [Indexed: 01/30/2023] Open
Abstract
This paper discusses how the activity and expression of cyclooxygenases are influenced by vanadium compounds at anticancer concentrations and recorded in inorganic vanadium poisonings. We refer mainly to the effects of vanadate (orthovanadate), vanadyl and pervanadate ions; the main focus is placed on their impact on intracellular signaling. We describe the exact mechanism of the effect of vanadium compounds on protein tyrosine phosphatases (PTP), epidermal growth factor receptor (EGFR), PLCγ, Src, mitogen-activated protein kinase (MAPK) cascades, transcription factor NF-κB, the effect on the proteolysis of COX-2 and the activity of cPLA2. For a better understanding of these processes, a lot of space is devoted to the transformation of vanadium compounds within the cell and the molecular influence on the direct targets of the discussed vanadium compounds.
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Affiliation(s)
- Jan Korbecki
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp. 72 Av., 70-111 Szczecin, Poland.
| | - Irena Baranowska-Bosiacka
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp. 72 Av., 70-111 Szczecin, Poland.
| | - Izabela Gutowska
- Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Broniewskiego 24 Str., 71-460 Szczecin, Poland.
| | - Dariusz Chlubek
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp. 72 Av., 70-111 Szczecin, Poland.
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89
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Olszowski T, Gutowska I, Baranowska-Bosiacka I, Piotrowska K, Korbecki J, Kurzawski M, Chlubek D. The Effect of Cadmium on COX-1 and COX-2 Gene, Protein Expression, and Enzymatic Activity in THP-1 Macrophages. Biol Trace Elem Res 2015; 165:135-44. [PMID: 25645360 PMCID: PMC4424267 DOI: 10.1007/s12011-015-0234-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Accepted: 01/11/2015] [Indexed: 01/20/2023]
Abstract
The aim of this study was to examine the effects of cadmium in concentrations relevant to those detected in human serum on cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2) expression at mRNA, protein, and enzyme activity levels in THP-1 macrophages. Macrophages were incubated with various cadmium chloride (CdCl2) solutions for 48 h at final concentrations of 5 nM, 20 nM, 200 nM, and 2 μM CdCl2. The mRNA expression and protein levels of COXs were analyzed with RT-PCR and Western blotting, respectively. Prostaglandin E2 (PGE2) and stable metabolite of thromboxane B2 (TXB2) concentrations in culture media were determined using ELISA method. Our study demonstrates that cadmium at the highest tested concentrations modulates COX-1 and COX-2 at mRNA level in THP-1 macrophages; however, the lower tested cadmium concentrations appear to inhibit COX-1 protein expression. PGE2 and TXB2 production is not altered by all tested Cd concentrations; however, the significant stimulation of PGE2 and TXB2 production is observed when macrophages are exposed to both cadmium and COX-2 selective inhibitor, NS-398. The stimulatory effect of cadmium on COXs at mRNA level is not reflected at protein and enzymatic activity levels, suggesting the existence of some posttranscriptional, translational, and posttranslational events that result in silencing of those genes' expression.
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Affiliation(s)
- Tomasz Olszowski
- Department of Hygiene and Epidemiology, Pomeranian Medical University, Powstańców Wlkp. 72 Av, 70-111 Szczecin, Poland
| | - Izabela Gutowska
- Department of Biochemistry and Human Nutrition, Pomeranian Medical University, Broniewskiego 24 Str, 71-460 Szczecin, Poland
| | - Irena Baranowska-Bosiacka
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp. 72 Av, 70-111 Szczecin, Poland
| | - Katarzyna Piotrowska
- Department of Physiology, Pomeranian Medical University, Powstańców Wlkp. 72 Av, 70-111 Szczecin, Poland
| | - Jan Korbecki
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp. 72 Av, 70-111 Szczecin, Poland
| | - Mateusz Kurzawski
- Department of Experimental and Clinical Pharmacology, Pomeranian Medical University, Powstańców Wlkp. 72 Av, 70-111 Szczecin, Poland
| | - Dariusz Chlubek
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Powstańców Wlkp. 72 Av, 70-111 Szczecin, Poland
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90
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Surowiak P, Gansukh T, Donizy P, Halon A, Rybak Z. Increase in cyclooxygenase-2 (COX-2) expression in keratinocytes and dermal fibroblasts in photoaged skin. J Cosmet Dermatol 2015; 13:195-201. [PMID: 25196686 DOI: 10.1111/jocd.12103] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/21/2014] [Indexed: 11/26/2022]
Abstract
BACKGROUND Interleukins and NFκ-B are involved in the development of inflammatory reactions. It has been suggested that these proteins are important contributing factors in the process of photoaging of skin. Moreover, interleukins and NFκ-B are known to be capable of inducing expression of cyclooxygenase 2 (COX-2). Expression of COX-2 in various populations of skin cells has not been examined in the specific processes of aging. OBJECTIVES The study aimed at evaluating COX-2 expression in skin samples originating from patients with chronologically aged and photoaged skin at various stages of skin aging. METHODS Immunohistochemical analysis of COX-2 reactivity was conducted on samples originating from 52 women undergoing surgery for reasons other than skin pathology. RESULTS Our study demonstrated that COX-2 expression in keratinocytes and fibroblasts was significantly higher in skin samples affected by photoaging than in samples affected by endogenous aging or obtained from younger individuals. CONCLUSIONS The results indicate that COX-2 may be involved in the pathogenesis of the photoaging process. Inhibition of expression or activity of the enzyme may find application in photoaging treatment and/or prophylaxis.
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Affiliation(s)
- Pawel Surowiak
- Department of Histology and Embryology, Wroclaw Medical University, Wrocław, Poland; Polish Association of Aesthetic and Anti-Aging Medicine, PTL, Warsaw, Poland; DermaMed Institute of Aesthetic Medicine, Wrocław, Poland
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91
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Epigenetic regulations of inflammatory cyclooxygenase-derived prostanoids: molecular basis and pathophysiological consequences. Mediators Inflamm 2015; 2015:841097. [PMID: 25944989 PMCID: PMC4402557 DOI: 10.1155/2015/841097] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Accepted: 03/29/2015] [Indexed: 12/21/2022] Open
Abstract
The potential relevance of prostanoid signaling in immunity and immunological disorders, or disease susceptibility and individual variations in drug responses, is an important area for investigation. The deregulation of Cyclooxygenase- (COX-) derived prostanoids has been reported in several immunoinflammatory disorders such as asthma, rheumatoid arthritis, cancer, and autoimmune diseases. In addition to the environmental factors and the genetic background to diseases, epigenetic mechanisms involved in the fine regulation of prostanoid biosynthesis and/or receptor signaling appeared to be an additional level of complexity in the understanding of prostanoid biology and crucial in controlling the different components of the COX pathways. Epigenetic alterations targeting inflammatory components of prostanoid biosynthesis and signaling pathways may be important in the process of neoplasia, depending on the tissue microenvironment and target genes. Here, we focused on the epigenetic modifications of inflammatory prostanoids in physiological immune response and immunological disorders. We described how major prostanoids and their receptors can be functionally regulated epigenetically and consequently the impact of these processes in the pathogenesis inflammatory diseases and the development of therapeutic approaches that may have important clinical applications.
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92
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Johnston PC, Lansang MC, Chatterjee S, Kennedy L. Intra-articular glucocorticoid injections and their effect on hypothalamic-pituitary-adrenal (HPA)-axis function. Endocrine 2015; 48:410-6. [PMID: 25182149 DOI: 10.1007/s12020-014-0409-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Accepted: 08/26/2014] [Indexed: 12/27/2022]
Abstract
The use of intra-articular (IA) glucocorticoids for reducing pain and inflammation in patients with osteoarthritis, rheumatoid arthritis, and other inflammatory arthropathies is widespread among primary care physicians, specialists, and non-specialists in the United States. Injectable glucocorticoids have anti-inflammatory and analgesic properties which can be effective in improving clinical parameters such as pain, range of motion, and quality of life. After injection into the IA space, glucocorticoids may be systemically absorbed; the degree of absorption can depend on the size of the joint injected, the injectable glucocorticoid preparation used, the dosage, and the frequency of the injection. The adverse effects of intra-articular glucocorticoid injections (IAGC) can often be overlooked by both the patient and physicians who administer them, in particular the potential deleterious effect on the hypothalamic-pituitary-adrenal (HPA)-axis which can result in adrenal suppression and/or iatrogenic Cushing syndrome. In this paper we provide an overview on the often under-recognized effects of IAGC on HPA-axis function.
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Affiliation(s)
- Philip C Johnston
- Department of Endocrinology, Diabetes and Metabolism, Cleveland Clinic Foundation, 9500 Euclid Avenue Desk F20, Cleveland, OH, 44195, USA,
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93
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Liu G, Wu Q, Liu G, Song X, Zhang J. Psoriasin (S100A7) is a novel biomarker for lung squamous cell carcinoma in humans. Cancer Cell Int 2015; 15:18. [PMID: 25745359 PMCID: PMC4350630 DOI: 10.1186/s12935-014-0154-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 12/27/2014] [Indexed: 01/04/2023] Open
Abstract
Objective Psoriasin (S100A7) plays a role in the malignant potential of several epithelial cancers, and could candidate diagnostic marker or therapeutic target. Nuclear factor kappa B (NF-κB) regulates cancer cell growth and is modulated by phospholipase activity in many cancer cells. In the present study, we first evaluate the involvement of S100A7 in lung squamous cell carcinoma and its clinical usefulness for diagnosis. We then study whether knockdown of S100A7 in lung squamous cell carcinoma cells would reduce cell proliferation and NF-κB activity in vitro and attenuate tumor growth in vivo. Methods We examined S100A7 expression in lung squamous cell carcinoma tissues by immunohistology. The human lung squamous cell carcinoma cell line NCI-H520 were transduced with short hairpin RNA targeting S100A7. Quantitative reverse transcriptase-polymerase chain reaction and immunoblotting confirmed knockdown of S100A7 messenger RNA and protein, respectively. Cell proliferation was evaluated by the MTT assay. NF-κB phosphorylation was assayed by western blot. 1 × 106 of NCI-H520/S100A7 knockdown cells were injected into the left flanks of nude mice (aged 6 to 8 weeks). Tumors were followed for 35 days, then removed and stained with hematoxylin and eosin, stained with Ki-67, and analyzed for S100A7 protein expression. Results S100A7 protein levels were significantly higher in carcinoma specimens than in nonneoplastic tissues. S100A7 might be a useful marker for diagnosis of lung squamous cell carcinoma. In vitro data showed that inhibition of S100A7 decreased proliferation of NCI-H520 cells. S100A7 knockdown reduced NF-κB phosphorylation and tumor growth in vivo and vivo. Explanted knockdown tumors maintained lower S100A7 levels compared with wild-type, confirmed by immunohistology. Ki-67 staining was more prominent throughout the wild-type tumors compared with knockdown tumors. Conclusions Our present results suggest that S100A7 level is a promising tool for diagnosis of lung squamous cell carcinoma. Knockdown of S100A7 suppresses lung cancer growth in part by attenuating NF-κB activity. S100A7 may be a promising therapeutic target for lung squamous cell carcinoma.
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Affiliation(s)
- Guijuan Liu
- Department of Cytology Laboratory, People's Hospital of Linyi, Linyi, 276300 Shandong China
| | - Qiang Wu
- Department of Nursing, People's Hospital of Yinan, Linyi, Shandong 276300 China
| | - Guilan Liu
- Department of Nursing, People's Hospital of Yinan, Linyi, Shandong 276300 China
| | - Xueying Song
- Department of Thoracic Surgery, the People's Hospital of Rizhao, Rizhao, China
| | - Jihong Zhang
- Department of Nursing, People's Hospital of Yinan, Linyi, Shandong 276300 China
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94
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Wu Q, Yao HD, Tan SR, Zhang ZW, Zhu YH, Xu S. Possible correlation of selenoprotein W with inflammation factors in chicken skeletal muscles. Biol Trace Elem Res 2014; 161:167-72. [PMID: 25123462 DOI: 10.1007/s12011-014-0092-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Accepted: 07/25/2014] [Indexed: 01/18/2023]
Abstract
The aim of the present study was to investigate the possible correlation of selenoprotein W (SelW) with inflammatory injury induced by dietary selenium (Se) deficiency in chicken. One-day-old male chickens were fed either a commercial diet or a Se-deficient diet for 55 days. Then, the expression levels of SelW messenger RNA (mRNA) and inflammation-related genes (NF-κB, TNF-α, iNOS, COX-2, and PTGES) in chicken skeletal muscles (wing muscle, pectoral muscle, and thigh muscle) were determined at 15, 25, 35, 45, and 55 days old, respectively. In addition, the correlation between SelW mRNA expression and inflammation-related genes were assessed. The results showed that dietary Se deficiency reduced the mRNA expression of SelW in chicken wing, pectorals, and thigh muscles. In contrast, Se deficiency increased the mRNA expression levels of inflammation-related genes in chicken skeletal muscle tissues at different time points. The Pearson's correlation coefficients showed that the mRNA expression levels of inflammation-related genes were significantly negative related to SelW (p < 0.05). These data showed that Se deficiency induced the inflammatory response in chicken skeletal muscle. As one important selenoprotein gene in skeletal muscles, SelW may play a role in the regulation of inflammation reaction in Se-deficiency myopathy.
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Affiliation(s)
- Qiong Wu
- College of Veterinary Medicine, Northeast Agricultural University, 59 Mucai Street, Xiangfang District, Harbin, 150030, People's Republic of China
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95
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Park JW, Min KJ, Kim DE, Kwon TK. Withaferin A induces apoptosis through the generation of thiol oxidation in human head and neck cancer cells. Int J Mol Med 2014; 35:247-52. [PMID: 25351115 DOI: 10.3892/ijmm.2014.1983] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Accepted: 10/22/2014] [Indexed: 11/06/2022] Open
Abstract
Withaferin A is a steroidal lactone purified from the Indian medicinal plant, Withania somnifera. Withaferin A has been shown to inhibit the proliferation, metastasis, invasion and angiogenesis of cancer cells. In the present study, we investigated whether withaferin A induces apoptosis in the human head and neck cancer cells, AMC-HN4. Withaferin A markedly increased the sub-G1 cell population and the cleavage of poly(ADP-ribose) polymerase (PARP), which are markers of apoptosis. Pan-caspase inhibitor, z-VAD-fmk (z-VAD), markedly inhibited the withaferin A-induced apoptosis. However, the withaferin A-induced increase in the expression of COX-2 was not affected by treatment with z-VAD. Furthermore, withaferin A upregulated cyclooxygenase-2 (COX-2) expression. The COX-2 inhibitor, NS-398, reduced the withaferin A-induced production of prostaglandin E2. However, treatment with NS-398 did not affect the sub-G1 population and the cleavage of PARP. In addition, the withaferin A-induced apoptosis was independent of reactive oxygen species production. Thiol donors [N-acetylcysteine (NAC) and dithiothreitol (DTT)] reversed withaferin A-induced apoptosis. Therefore, our data suggest that withaferin A induces apoptosis through the mechanism of thiol oxidation in head and neck carcinoma cells.
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Affiliation(s)
- Jong Won Park
- Department of Otolaryngology, School of Medicine, Keimyung University, Dalseo-Gu, Daegu 704-701, Republic of Korea
| | - Kyoung-Jin Min
- Department of Immunology, School of Medicine, Keimyung University, Dalseo-Gu, Daegu 704-701, Republic of Korea
| | - Dong Eun Kim
- Department of Otolaryngology, School of Medicine, Keimyung University, Dalseo-Gu, Daegu 704-701, Republic of Korea
| | - Taeg Kyu Kwon
- Department of Immunology, School of Medicine, Keimyung University, Dalseo-Gu, Daegu 704-701, Republic of Korea
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96
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Bakry OA, Samaka RM, Shoeib MAM, Abdel Aal SM. Nuclear Factor Kappa B and Cyclo-Oxygenase-2: Two Concordant Players in Psoriasis Pathogenesis. Ultrastruct Pathol 2014; 39:49-61. [DOI: 10.3109/01913123.2014.952470] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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97
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Fiebich BL, Akter S, Akundi RS. The two-hit hypothesis for neuroinflammation: role of exogenous ATP in modulating inflammation in the brain. Front Cell Neurosci 2014; 8:260. [PMID: 25225473 PMCID: PMC4150257 DOI: 10.3389/fncel.2014.00260] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 08/14/2014] [Indexed: 11/13/2022] Open
Abstract
Brain inflammation is a common occurrence following responses to varied insults such as bacterial infections, stroke, traumatic brain injury and neurodegenerative disorders. A common mediator for these varied inflammatory responses is prostaglandin E2 (PGE2), produced by the enzymatic activity of cyclooxygenases (COX) 1 and 2. Previous attempts to reduce neuronal inflammation through COX inhibition, by use of nonsteroidal anti-inflammatory drugs (NSAIDs), have met with limited success. We are proposing the two-hit model for neuronal injury—an initial localized inflammation mediated by PGE2 (first hit) and the simultaneous release of adenosine triphosphate (ATP) by injured cells (second hit), which significantly enhances the inflammatory response through increased synthesis of PGE2. Several evidences on the role of exogenous ATP in inflammation have been reported, including contrary instances where extracellular ATP reduces inflammatory events. In this review, we will examine the current literature on the role of P2 receptors, to which ATP binds, in modulating inflammatory reactions during neurodegeneration. Targeting the P2 receptors, therefore, provides a therapeutic alternative to reduce inflammation in the brain. P2 receptor-based anti-inflammatory drugs (PBAIDs) will retain the activities of essential COX enzymes, yet will significantly reduce neuroinflammation by decreasing the enhanced production of PGE2 by extracellular ATP.
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Affiliation(s)
- Bernd L Fiebich
- Department of Psychiatry and Psychotherapy, Neurochemistry Research Laboratory, University of Freiburg Medical School Freiburg, Germany
| | - Shamima Akter
- Neuroinflammation Research Laboratory, Faculty of Life Sciences and Biotechnology, South Asian University New Delhi, Delhi, India
| | - Ravi Shankar Akundi
- Neuroinflammation Research Laboratory, Faculty of Life Sciences and Biotechnology, South Asian University New Delhi, Delhi, India
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98
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Zhang XF, Zhu Y, Liang WB, Zhang JJ. Transcription factor Ets-1 inhibits glucose-stimulated insulin secretion of pancreatic β-cells partly through up-regulation of COX-2 gene expression. Endocrine 2014; 46:470-6. [PMID: 24287791 DOI: 10.1007/s12020-013-0114-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 11/04/2013] [Indexed: 10/26/2022]
Abstract
Increased cyclooxygenase-2 (COX-2) expression is associated with pancreatic β-cell dysfunction. We previously demonstrated that the transcription factor Ets-1 significantly up-regulated COX-2 gene promoter activity. In this report, we used the pancreatic β-cell line INS-1 and isolated rat islets to investigate whether Ets-1 could induce β-cell dysfunction through up-regulating COX-2 gene expression. We investigated the effects of ETS-1 overexpression and the effects of ETS-1 RNA interference on endogenous COX-2 expression in INS-1 cells. We used site-directed mutagenesis and a dual luciferase reporter assay to study putative Ets-1 binding sites in the COX-2 promoter. The effect of ETS-1 1 overexpression on the insulin secretion function of INS-1 cells and rat islets and the potential reversal of these effects by a COX-2 inhibitor were determined in a glucose-stimulated insulin secretion (GSIS) assay. ETS-1 overexpression significantly induces endogenous COX-2 expression, but ETS-1 RNA interference has no effect on basal COX-2 expression in INS-1 cells. Ets-1 protein significantly increases COX-2 promoter activity through the binding site located in the -195/-186 region of the COX-2 promoter. ETS-1 overexpression significantly inhibited the GSIS function of INS-1 cells and islet cells and COX-2 inhibitor treatment partly reversed this effect. These findings indicated that ETS-1 overexpression induces β-cell dysfunction partly through up-regulation of COX-2 gene expression. Moreover, Ets-1, the transcriptional regulator of COX-2 expression, may be a potential target for the prevention of β-cell dysfunction mediated by COX-2.
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Affiliation(s)
- Xiong-Fei Zhang
- Department of Biochemistry, Nanjing University of Chinese Medicine, Nanjing, 210023, People's Republic of China
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99
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Pro-oxidant activity of indicaxanthin from Opuntia ficus indica modulates arachidonate metabolism and prostaglandin synthesis through lipid peroxide production in LPS-stimulated RAW 264.7 macrophages. Redox Biol 2014; 2:892-900. [PMID: 25180166 PMCID: PMC4143813 DOI: 10.1016/j.redox.2014.07.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 07/09/2014] [Accepted: 07/11/2014] [Indexed: 11/24/2022] Open
Abstract
Macrophages come across active prostaglandin (PG) metabolism during inflammation, shunting early production of pro-inflammatory towards anti-inflammatory mediators terminating the process. This work for the first time provides evidence that a phytochemical may modulate the arachidonate (AA) metabolism in lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophages, promoting the ultimate formation of anti-inflammatory cyclopentenone 15deoxy-PGJ2. Added 1 h before LPS, indicaxanthin from Opuntia Ficus Indica prevented activation of nuclear factor-κB (NF-κB) and over-expression of PGE2 synthase-1 (mPGES-1), but up-regulated cyclo-oxygenase-2 (COX-2) and PGD2 synthase (H-PGDS), with final production of the anti-inflammatory cyclopentenone. The effects were positively related with concentration between 50 and 100 µM. Indicaxanthin did not have any effect in the absence of LPS. A kinetic study investigating the redox status of LPS-stimulated macrophages between 0.5 and 12 h, either in the absence or in the presence of 50–100 µM indicaxanthin, revealed a differential control of ROS production, with early (0.5–3 h) modest inhibition, followed by a progressive (3–12 h) concentration-dependent enhancement over the level induced by LPS alone. In addition, indicaxanthin caused early (0.5–3 h) concentration-dependent elevation of conjugated diene lipid hydroperoxides, and production of hydroxynonenal-protein adducts, over the amount induced by LPS. In LPS-stimulated macrophages indicaxanthin did not affect PG metabolism when co-incubated with either an inhibitor of NADPH oxidase or vitamin E. It is concluded that LPS-induced pro-oxidant activity of indicaxanthin at the membrane level allows formation of signaling intermediates whose accumulation modulates PG biosynthetic pathway in inflamed macrophages. Phytochemical indicaxanthin promotes synthesis of anti-inflammatory prostaglandins. Prooxidant activity of indicaxanthin causes anti-inflammatory response in macrophages. Indicaxanthin modulates the redox status of LPS-stimulated macrophages. Membrane lipid peroxides are signaling intermediates in inflamed macrophages.
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100
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Lutz CS, Cornett AL. Regulation of genes in the arachidonic acid metabolic pathway by RNA processing and RNA-mediated mechanisms. WILEY INTERDISCIPLINARY REVIEWS-RNA 2014; 4:593-605. [PMID: 23956046 DOI: 10.1002/wrna.1183] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 05/28/2013] [Accepted: 05/29/2013] [Indexed: 01/22/2023]
Abstract
Arachidonic acid (AA) is converted by enzymes in an important metabolic pathway to produce molecules known collectively as eicosanoids, 20 carbon molecules with significant physiological and pathological functions in the human body. Cyclooxygenase (COX) enzymes work in one arm of the pathway to produce prostaglandins (PGs) and thromboxanes (TXs), while the actions of 5-lipoxygenase (ALOX5 or 5LO) and its associated protein (ALOX5AP or FLAP) work in the other arm of the metabolic pathway to produce leukotrienes (LTs). The expression of the COX and ALOX5 enzymes that convert AA to eicosanoids is highly regulated at the post- or co-transcriptional level by alternative mRNA splicing, alternative mRNA polyadenylation, mRNA stability, and microRNA (miRNA) regulation. This review article will highlight these mechanisms of mRNA modulation.
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Affiliation(s)
- Carol S Lutz
- Department of Biochemistry and Molecular Biology, New Jersey Medical School and the Graduate School of Biomedical Sciences, Rutgers, NJ, USA.
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