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Urrego N, Sepúlveda P, Aragón M, Ramos FA, Costa GM, Ospina LF, Castellanos L. Flavonoids and saponins from Passiflora edulis f. edulis leaves (purple passion fruit) and its potential anti-inflammatory activity. J Pharm Pharmacol 2021; 73:1530-1538. [PMID: 34436599 DOI: 10.1093/jpp/rgab117] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 07/19/2021] [Indexed: 12/14/2022]
Abstract
OBJECTIVES The objective of this work was to evaluate the anti-inflammatory activity of the aqueous extract, fractions and major compounds, which are isolated and identified from Passiflora edulis f. edulis (purple passion fruit) leaves extract. METHODS For the isolation of the major compounds, reversed-phase chromatography and normal phase countercurrent chromatography were used. The separation was followed by thin layer chromatography and HPLC-DAD-ELSD. One-dimensional and two-dimensional NMR and ESI-TOF-MS/MS were used for structural elucidation. The anti-inflammatory activity was evaluated on a TPA multiple dose model of skin chronic inflammation in mice. Additionally, myeloperoxidase (MPO) and nitric oxide synthase (NOS) activity assays were performed as possible mechanisms of action studies. KEY FINDINGS AND CONCLUSIONS The study of the butanolic fraction mainly showed the presence of saponins and flavonoids. Three minor flavonoids were detected; and three known saponins, cyclopassiflosides IX, XI and III were isolated and identified. This is the first unequivocal report of the presence of these compounds in P. edulis f. edulis leaves. The most favourable results of anti-inflammatory activity were obtained for the flavonoid-rich fraction. All the fractions and isolated compounds evaluated, presented high percentages of inhibition of nitric oxide synthase activity.
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Affiliation(s)
- Norman Urrego
- Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Farmacia, Bogotá, Colombia
| | - Paula Sepúlveda
- Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Farmacia, Bogotá, Colombia
| | - Marcela Aragón
- Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Farmacia, Bogotá, Colombia
| | - Freddy A Ramos
- Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Química, Bogotá, Colombia
| | - Geison M Costa
- Pontificia Universidad Javeriana, Facultad de Ciencias, Departamento de Química, Bogotá, Colombia
| | - Luis F Ospina
- Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Farmacia, Bogotá, Colombia
| | - Leonardo Castellanos
- Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Química, Bogotá, Colombia
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Alonso‐Castro AJ, Arana‐Argáez VE, Deveze‐Alvarez MA, Chan‐Zapata I, Torres‐Romero JC, Carranza‐Álvarez C, Luna‐Rubio S, González‐Chávez MM, Zapata‐Morales JR, Aragón‐Martínez OH, Ramírez‐Morales MA. Anti‐inflammatory and diuretic effects of the diterpene ent‐dihydrotucumanoic acid. Drug Dev Res 2019; 80:800-806. [DOI: 10.1002/ddr.21561] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 06/06/2019] [Accepted: 06/13/2019] [Indexed: 11/12/2022]
Affiliation(s)
- Angel Josabad Alonso‐Castro
- Departamento de Farmacia, División de Ciencias Naturales y ExactasUniversidad de Guanajuato Guanajuato Guanajuato Mexico
| | | | - Martha Alicia Deveze‐Alvarez
- Departamento de Farmacia, División de Ciencias Naturales y ExactasUniversidad de Guanajuato Guanajuato Guanajuato Mexico
| | - Ivan Chan‐Zapata
- Facultad de QuímicaUniversidad Autónoma de Yucatán Mérida Yucatán Mexico
| | | | - Candy Carranza‐Álvarez
- Unidad Académica Multidisciplinaria zona HuastecaUniversidad Autónoma de San Luis Potosí Ciudad Valles San Luis Potosí Mexico
| | - Sarahí Luna‐Rubio
- Unidad Académica Multidisciplinaria zona HuastecaUniversidad Autónoma de San Luis Potosí Ciudad Valles San Luis Potosí Mexico
| | - Marco M. González‐Chávez
- Facultad de Ciencias QuímicasUniversidad Autónoma de San Luis Potosí San Luis Potosí San Luis Potosí Mexico
| | - Juan R. Zapata‐Morales
- Departamento de Farmacia, División de Ciencias Naturales y ExactasUniversidad de Guanajuato Guanajuato Guanajuato Mexico
| | | | - Marco Antonio Ramírez‐Morales
- Departamento de Farmacia, División de Ciencias Naturales y ExactasUniversidad de Guanajuato Guanajuato Guanajuato Mexico
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Gargiulo S, Rossin D, Testa G, Gamba P, Staurenghi E, Biasi F, Poli G, Leonarduzzi G. Up-regulation of COX-2 and mPGES-1 by 27-hydroxycholesterol and 4-hydroxynonenal: A crucial role in atherosclerotic plaque instability. Free Radic Biol Med 2018; 129:354-363. [PMID: 30312760 DOI: 10.1016/j.freeradbiomed.2018.09.046] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 09/26/2018] [Accepted: 09/29/2018] [Indexed: 12/12/2022]
Abstract
Atherosclerosis is currently understood to be mainly the consequence of a complicated inflammatory process at the different stages of plaque development. Among the several inflammatory molecules involved, up-regulation of the functional cyclooxygenase 2/membrane-bound prostaglandin E synthase 1 (COX-2/mPGES-1) axis plays a key role in plaque development. Excessive production of oxidized lipids, following low-density lipoprotein (LDL) oxidation, is a characteristic feature of atherosclerosis. Among the oxidized lipids of LDLs, the oxysterol 27-hydroxycholesterol (27-OH) and the aldehyde 4-hydroxynonenal (HNE) substantially accumulate in the atherosclerotic plaque, contributing to its progression and instability through a variety of processes. This study shows that 27-OH and HNE promote up-regulation of both the inducible enzymes COX-2 and mPGES-1, leading to increased production of prostaglandin (PG) E2 and inducible nitric oxide synthase, and the subsequent release of nitric oxide in human promonocytic U937 cells. The study also examined the potential involvement of the functionally coupled COX-2/mPGES-1 in enhancing the production of certain pro-inflammatory cytokines and of matrix metalloproteinase 9 by U937 cells. This enhancement is presumably due to the induction of PGE2 synthesis, as a result of the up-regulation of the COX-2/mPGES-1, stimulated by the two oxidized lipids, 27-OH and HNE. Induction of PGE2 synthesis might thus be a mechanism of plaque instability and eventual rupture, contributing to matrix metalloproteinase production by activated macrophages.
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Affiliation(s)
- Simona Gargiulo
- Department of Clinical and Biological Sciences, School of Medicine, University of Turin, Orbassano, Torino, Italy
| | - Daniela Rossin
- Department of Clinical and Biological Sciences, School of Medicine, University of Turin, Orbassano, Torino, Italy
| | - Gabriella Testa
- Department of Clinical and Biological Sciences, School of Medicine, University of Turin, Orbassano, Torino, Italy
| | - Paola Gamba
- Department of Clinical and Biological Sciences, School of Medicine, University of Turin, Orbassano, Torino, Italy
| | - Erica Staurenghi
- Department of Clinical and Biological Sciences, School of Medicine, University of Turin, Orbassano, Torino, Italy
| | - Fiorella Biasi
- Department of Clinical and Biological Sciences, School of Medicine, University of Turin, Orbassano, Torino, Italy
| | - Giuseppe Poli
- Department of Clinical and Biological Sciences, School of Medicine, University of Turin, Orbassano, Torino, Italy
| | - Gabriella Leonarduzzi
- Department of Clinical and Biological Sciences, School of Medicine, University of Turin, Orbassano, Torino, Italy.
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Anti-Inflammatory Effects of Curvularin-Type Metabolites from a Marine-Derived Fungal Strain Penicillium sp. SF-5859 in Lipopolysaccharide-Induced RAW264.7 Macrophages. Mar Drugs 2017; 15:md15090282. [PMID: 28869509 PMCID: PMC5618421 DOI: 10.3390/md15090282] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 08/18/2017] [Accepted: 08/30/2017] [Indexed: 01/06/2023] Open
Abstract
Chemical study on the extract of a marine-derived fungal strain Penicillium sp. SF-5859 yielded a new curvularin derivative (1), along with eight known curvularin-type polyketides (2–9). The structures of these metabolites (1–9) were established by comprehensive spectroscopic analyses, including 1D and 2D nuclear magnetic resonance (NMR) spectroscopy, and mass spectrometry (MS). In vitro anti-inflammatory effects of these metabolites were evaluated in lipopolysaccharide (LPS)-stimulated RAW264.7 macrophages. Among these metabolites, 3–9 were shown to strongly inhibit LPS-induced overproduction of nitric oxide (NO) and prostaglandin E2 (PGE2) with IC50 values ranging from 1.9 μM to 18.1 μM, and from 2.8 μM to 18.7 μM, respectively. In the further evaluation of signal pathways involved in these effects, the most active compound, (10E,15S)-10,11-dehydrocurvularin (8) attenuated the expression of inducible NO synthase (iNOS) and cyclooxygenase-2 (COX-2) in LPS-stimulated RAW264.7 macrophages. Furthermore, compound 8 was shown to suppress the upregulation of pro-inflammatory mediators and cytokines via the inhibition of the nuclear factor-κB (NF-κB) signaling pathway, but not through the mitogen-activated protein kinase (MAPK) pathway. Based on the comparisons of the different magnitude of the anti-inflammatory effects of these structurally-related metabolites, it was suggested that the opening of the 12-membered lactone ring in curvularin-type metabolites and blocking the phenol functionality led to the significant decrease in their anti-inflammatory activity.
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Zhou J, Sun YY, Sun MY, Mao WA, Wang L, Zhang J, Zhang H. Prim-O-glucosylcimifugin Attenuates Lipopolysaccharideinduced Inflammatory Response in RAW 264.7 Macrophages. Pharmacogn Mag 2017; 13:378-384. [PMID: 28839360 PMCID: PMC5551353 DOI: 10.4103/pm.pm_323_16] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Revised: 08/30/2016] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND Radix Saposhnikoviae (RS) exerts anti-inflammatory, analgesic, antipyretic, antioxidation effects and has been used in traditional Chinese medicine to treat common colds, headache, and rheumatoid arthritis. Prim-O-glucosylcimifugin (POG) is the highest content chromone and one of the major active constituents in RS. OBJECTIVE The study was aimed to explore the anti-inflammation effects of POG in lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophages. MATERIALS AND METHODS Cell viability was detected by Cell Counting Kit-8 assay. Production of nitric oxide (NO), tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), and IL-6 was assessed by enzyme-linked immunosorbent assay. Real-time polymerase chain reaction and Western blot were performed to analyze mRNA and protein levels, respectively. RESULTS During the whole experiment, 15, 50, and 100 μg/mL of POG had no cytotoxicity on RAW 264.7 cells. POG dose-dependently inhibited the production of NO, TNF-α, IL-1β, and IL-6 that were induced by LPS. POG treatment downregulated the mRNA and protein expression inducible NO synthase (iNOS) and cyclooxygenase 2 (COX-2) in LPS-activated RAW 264.7 macrophages in a concentration-dependent manner. Furthermore, LPS-induced JAK2/STAT3 activation was prevented in RAW 264.7 macrophages by POG treatment. STAT3 overexpression significantly reversed the effects of POG on LPS-activated RAW 264.7 macrophages. CONCLUSION These results demonstrate that POG exerts anti-inflammatory effects through the inhibition of iNOS and COX-2 expression by inhibiting the phosphorylation of JAK2/STAT3. SUMMARY POG exerts anti-inflammatory effects in RAW 264.7 macrophages through the inhibition of iNOS and COX-2 expression by inhibiting JAK2/STAT3 signaling. Abbreviations used: LPS: Lipopolyssacharide; NO: Nitric oxide; TNF-α: Tumor necrosis factor-α; IL: Interleukin; RS: Radix Saposhnikoviae; POG: Prim-O-glucosylcimifugin; iNOS: Inducible NO synthase; COX2: Cyclooxygenase; FBS: Fetal bovine serum; DMSO: Dimethylsulfoxide; CCK-8: Cell Counting Kit; RIPA: Radio immunoprecipitation assay buffer; ECL: Enhanced chemiluminescence; SD: Standard deviation; ELISA: Enzyme-Linked immunosorbent assay.
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Affiliation(s)
- Jie Zhou
- Department of Dermatology, Seventh People's Hospital of Shanghai University of TCM, Shanghai 200137, China
| | - Yuan-Yuan Sun
- Department of Clinical Medicine, Bengbu Medical College, Anhui 233000, China
| | - Meng-Yao Sun
- Department of Pharmaceutical Botany, School of Pharmacy, Second Military Medical University, Shanghai 200433, China
| | - Wei-An Mao
- Xinchang Community Health Service Center, Pudong New Area, Shanghai 201314, China
| | - Li Wang
- Department of Dermatology, Seventh People's Hospital of Shanghai University of TCM, Shanghai 200137, China
| | - Jian Zhang
- Department of Dermatology, Seventh People's Hospital of Shanghai University of TCM, Shanghai 200137, China
| | - Hong Zhang
- Department of Clinical Medicine, Bengbu Medical College, Anhui 233000, China.,Xinchang Community Health Service Center, Pudong New Area, Shanghai 201314, China
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Terzuoli E, Finetti F, Costanza F, Giachetti A, Ziche M, Donnini S. Linking of mPGES-1 and iNOS activates stem-like phenotype in EGFR-driven epithelial tumor cells. Nitric Oxide 2017; 66:17-29. [PMID: 28257996 DOI: 10.1016/j.niox.2017.02.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 02/21/2017] [Accepted: 02/27/2017] [Indexed: 12/19/2022]
Abstract
Inflammatory prostaglandin E-2 (PGE-2) favors cancer progression in epithelial tumors characterized by persistent oncogene input. However, its effects on tumor cell stemness are poorly understood at molecular level. Here we describe two epithelial tumor cells A431 and A459, originating from human lung and skin tumors, in which epithelial growth factor (EGF) induces sequential up-regulation of mPGES-1 and iNOS enzymes, producing an inflammatory intracellular milieu. We demonstrated that concerted action of EGF, mPGES-1 and iNOS causes sharp changes in cell phenotype demonstrated by acquisition of stem-cell features and activation of the epithelial-mesenchymal transition (EMT). When primed with EGF, epithelial tumor cells transfected with mPGES-1 or iNOS to ensure steady enzyme levels display major stem-like and EMT markers, such as reduction in E-cadherin with a concomitant rise in vimentin, ALDH-1, CD133 and ALDH activity. Tumorsphere studies with these cells show increased sphere number and size, enhanced migratory and clonogenic capacity and sharp changes in EMT markers, indicating activation of this process. The concerted action of the enzymes forms a well-orchestrated cascade where expression of iNOS depends on overexpression of mPGES-1. Indeed, we show that through its downstream effectors (PGE-2, PKA, PI3K/Akt), mPGES-1 recruits non-canonical transcription factors, thus facilitating iNOS production. In conclusion, we propose that the initial event leading to tumor stem-cell activation may be a leveraged intrinsic mechanism in which all players are either inherent constituents (EGF) or highly inducible proteins (mPGES-1, iNOS) of tumor cells. We suggest that incipient tumor aggressiveness may be moderated by reducing pivotal input of mPGES-1.
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Affiliation(s)
- Erika Terzuoli
- Department of Life Sciences, University of Siena, 53100 Siena, Italy.
| | - Federica Finetti
- Department of Life Sciences, University of Siena, 53100 Siena, Italy.
| | - Filomena Costanza
- Department of Life Sciences, University of Siena, 53100 Siena, Italy.
| | - Antonio Giachetti
- Department of Life Sciences, University of Siena, 53100 Siena, Italy.
| | - Marina Ziche
- Department of Life Sciences, University of Siena, 53100 Siena, Italy; Istituto Toscano Tumori (ITT), 50136 Florence, Italy.
| | - Sandra Donnini
- Department of Life Sciences, University of Siena, 53100 Siena, Italy; Istituto Toscano Tumori (ITT), 50136 Florence, Italy.
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Zídek Z, Kverka M, Dusilová A, Kmoníčková E, Jansa P. Dual inhibition of nitric oxide and prostaglandin E2 production by polysubstituted 2-aminopyrimidines. Nitric Oxide 2016; 57:48-56. [PMID: 27133739 DOI: 10.1016/j.niox.2016.04.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 04/11/2016] [Accepted: 04/25/2016] [Indexed: 12/27/2022]
Abstract
The present in vitro experiments demonstrate inhibitory effects of polysubstituted 2-aminopyrimidines on high output production of nitric oxide (NO) and prostaglandin E2 (PGE2) stimulated by interferon-γ and lipopolysaccharide (LPS) in peritoneal macrophages of mouse and rat origin. PGE2 production was inhibited also in LPS-activated human peripheral blood mononuclear cells. A tight dependence of the suppressive activities on chemical structure of pyrimidines was observed. Derivatives containing hydroxyl groups at the C-4 and C-6 positions of pyrimidine ring were devoid of any influence on NO and PGE2. Remarkable inhibitory potential was acquired by the replacement of hydroxyl groups with chlorine, the 4,6-dichloro derivatives being more effective than the monochloro analogues. The effects were further intensified by modification of the amino group at the C-2 position, changing it to the (N,N-dimethylamino)methyleneamino or the formamido ones. There was no substantial difference in the expression of NO-inhibitory effects among derivatives containing distinct types of substituents at the C-5 position (hydrogen, methyl, ethyl, propyl, butyl, phenyl, and benzyl). In contrast to NO, larger substituents then methyl were required to inhibit PGE2 production. Overall, no significant correlation between the extent of NO and PGE2 suppression was observed. The IC50s of derivatives with the strongest effects on both NO and PGE2 were within the range of 2-10 μM. Their NO-inhibitory potential of pyrimidines was stronger than that of non-steroidal anti-inflammatory drugs (NSAIDs) aspirin and indomethacin. The PGE2-inhibitory effectiveness of pyrimidines was about the same as that of aspirin, but weaker as compared to indomethacin. The NO- and PGE2-inhibitory activity of tested pyrimidines has been found associated with decreased expression of iNOS mRNA and COX-2 mRNA, respectively, and with post-translation interactions. Selected NO-/PGE2-inhibitory derivatives decreased severity of intestinal inflammation in murine model of ulcerative colitis.
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Affiliation(s)
- Zdeněk Zídek
- Institute of Experimental Medicine, The Czech Academy of Sciences, Vídeňská 1083, 14220, Prague 4, Czech Republic.
| | - Miloslav Kverka
- Institute of Experimental Medicine, The Czech Academy of Sciences, Vídeňská 1083, 14220, Prague 4, Czech Republic; Institute of Microbiology, The Czech Academy of Sciences, Vídeňská 1083, 14220, Prague 4, Czech Republic
| | - Adéla Dusilová
- Institute of Experimental Medicine, The Czech Academy of Sciences, Vídeňská 1083, 14220, Prague 4, Czech Republic; Institute of Microbiology, The Czech Academy of Sciences, Vídeňská 1083, 14220, Prague 4, Czech Republic
| | - Eva Kmoníčková
- Institute of Experimental Medicine, The Czech Academy of Sciences, Vídeňská 1083, 14220, Prague 4, Czech Republic
| | - Petr Jansa
- Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Flemingovo nám. 2, 16610, Prague 6, Czech Republic
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Ranneh Y, Ali F, Al-Qubaisi M, Esa NM, Ismail A. The inhibitory activity of cocoa phenolic extract against pro-inflammatory mediators secretion induced by lipopolysaccharide in RAW 264.7 cells. SPRINGERPLUS 2016; 5:547. [PMID: 27190746 PMCID: PMC4850146 DOI: 10.1186/s40064-016-2138-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 04/11/2016] [Indexed: 12/19/2022]
Abstract
Cocoa is a rich source of polyphenols that has been traditionally used as the treatment of several types of inflammation related disease. The response to inflammation comprises the consecutive release of mediators and the enlistment of circulating leukocytes, such as macrophages. Currently, Cocoa-derived polyphenolics have shown anti-inflammatory effects in vivo, but the therapeutic benefits in vitro remain unclear. Therefore, in this study, the effect of cocoa polyphenolic extract (CPE) on RAW 264.7 macrophage cells sensitized by lipopolysaccharide as in vitro inflammatory model was investigated. The anti-inflammatory activity of CPE was assessed by measuring its ability to inhibit the pro-inflammatory enzyme 5-lipoxygenase (5-LOX) and the pro-inflammatory mediators prostaglandin E2 (PGE2), reactive oxygen species (ROS), nitric oxide (NO) and tumor necrosis factor-alpha (TNF-α). The results show that CPE significantly inhibits 5-LOX activity (p < 0.01). In addition, CPE dose-dependently suppressed the production of PGE2, ROS, NO and TNF-α in RAW 264.7 cells. These data suggest that CPE may be used for the treatment of inflammation and it’s related-diseases.
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Affiliation(s)
- Yazan Ranneh
- Department of Nutrition and Dietetics, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor Malaysia
| | - Faisal Ali
- Department of Nutrition and Dietetics, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor Malaysia ; Hematology Department, Faculty of Medicine and Health Sciences, University Hospital, Sana'a University, Sana'a, Yemen
| | - Mothanna Al-Qubaisi
- Laboratory of Molecular Biomedicine, Institute of Bioscience, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor Malaysia
| | - Norhaizan Mohd Esa
- Department of Nutrition and Dietetics, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor Malaysia ; Laboratory of Molecular Biomedicine, Institute of Bioscience, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor Malaysia
| | - Amin Ismail
- Department of Nutrition and Dietetics, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia (UPM), 43400 Serdang, Selangor Malaysia
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Zamani Taghizadeh Rabe S, Iranshahi M, Mahmoudi M. In vitro anti-inflammatory and immunomodulatory properties of umbelliprenin and methyl galbanate. J Immunotoxicol 2015; 13:209-16. [DOI: 10.3109/1547691x.2015.1043606] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Affiliation(s)
| | - Mehrdad Iranshahi
- Biotechnology Research Center, Mashhad University of Medical Science, Mashhad, Iran
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Hwang PA, Hung YL, Chien SY. Inhibitory activity of Sargassum hemiphyllum sulfated polysaccharide in arachidonic acid-induced animal models of inflammation. J Food Drug Anal 2014; 23:49-56. [PMID: 28911445 PMCID: PMC9351741 DOI: 10.1016/j.jfda.2014.05.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 05/07/2014] [Accepted: 05/07/2014] [Indexed: 11/24/2022] Open
Abstract
Sargassum hemiphyllum is a common plant found on the coasts of Taiwan; it has been used as an anti-inflammatory agent in traditional herbal medicine. This study aimed to evaluate the anti-inflammatory effects of S. hemiphyllum sulfated polysaccharide (SHSP) using two different mouse models. In both arachidonic acid-induced ear inflammatory gavage and paint models, SHSP decreased ear swelling and erythema. In addition, SHSP decreased the production of myeloperoxidase, nitric oxide, interleukin-1β (IL-1β), IL-6, and tumor necrosis factor-α in a dose-dependent manner. Histological examination results showed that SHSP reduced the area of neutrophilic infiltration in inflamed ears. The anti-inflammatory activity of SHSP has already been demonstrated in vitro. In this study, SHSP extracted from the same species of brown seaweed exhibited anti-inflammatory activity in both oral and topical applications in vivo. Therefore, SHSP may play a role in the treatment of inflammatory diseases.
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Affiliation(s)
- Pai-An Hwang
- Seafood Technology Division, Fisheries Research Institute, Council of Agriculture, Taiwan.
| | - Yu-Lan Hung
- Seafood Technology Division, Fisheries Research Institute, Council of Agriculture, Taiwan
| | - Shih-Yung Chien
- Institute of Food Science and Technology, National Taiwan University, Taiwan
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González-Perilli L, Álvarez MN, Prolo C, Radi R, Rubbo H, Trostchansky A. Nitroarachidonic acid prevents NADPH oxidase assembly and superoxide radical production in activated macrophages. Free Radic Biol Med 2013; 58:126-33. [PMID: 23318789 PMCID: PMC3622795 DOI: 10.1016/j.freeradbiomed.2012.12.020] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 12/03/2012] [Accepted: 12/21/2012] [Indexed: 11/29/2022]
Abstract
Nitration of arachidonic acid (AA) to nitroarachidonic acid (AANO2) leads to anti-inflammatory intracellular activities during macrophage activation. However, less is known about the capacity of AANO2 to regulate the production of reactive oxygen species under proinflammatory conditions. One of the immediate responses upon macrophage activation involves the production of superoxide radical (O2(•-)) due to the NADPH-dependent univalent reduction of oxygen to O2(•-) by the phagocytic NADPH oxidase isoform (NOX2), the activity of NOX2 being the main source of O2(•-) in monocytes/macrophages. Because the NOX2 and AA pathways are connected, we propose that AANO2 can modulate macrophage activation by inhibiting O2(•-) formation by NOX2. When macrophages were activated in the presence of AANO2, a significant inhibition of NOX2 activity was observed as evaluated by cytochrome c reduction, luminol chemiluminescence, Amplex red fluorescence, and flow cytometry; this process also occurs under physiological mimic conditions within the phagosomes. AANO2 decreased O2(•-) production in a dose- (IC50=4.1±1.8 μM AANO2) and time-dependent manner. The observed inhibition was not due to a decreased phosphorylation of the cytosolic subunits (e.g., p40(phox) and p47(phox)), as analyzed by immunoprecipitation and Western blot. However, a reduction in the migration to the membrane of p47(phox) was obtained, suggesting that the protective actions involve the prevention of the correct assembly of the active enzyme in the membrane. Finally, the observed in vitro effects were confirmed in an in vivo inflammatory model, in which subcutaneous injection of AANO2 was able to decrease NOX2 activity in macrophages from thioglycolate-treated mice.
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Affiliation(s)
| | | | | | | | | | - Andrés Trostchansky
- Address correspondence to: Andrés Trostchansky, Ph.D., Departamento de Bioquímica, Facultad de Medicina, Avda. Gral. Flores 2125, C.P. 11800, Montevideo, Uruguay; Phone: (598)-2924 9562; Fax: (598)-2924 9563;
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Petho G, Reeh PW. Sensory and signaling mechanisms of bradykinin, eicosanoids, platelet-activating factor, and nitric oxide in peripheral nociceptors. Physiol Rev 2013; 92:1699-775. [PMID: 23073630 DOI: 10.1152/physrev.00048.2010] [Citation(s) in RCA: 191] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Peripheral mediators can contribute to the development and maintenance of inflammatory and neuropathic pain and its concomitants (hyperalgesia and allodynia) via two mechanisms. Activation or excitation by these substances of nociceptive nerve endings or fibers implicates generation of action potentials which then travel to the central nervous system and may induce pain sensation. Sensitization of nociceptors refers to their increased responsiveness to either thermal, mechanical, or chemical stimuli that may be translated to corresponding hyperalgesias. This review aims to give an account of the excitatory and sensitizing actions of inflammatory mediators including bradykinin, prostaglandins, thromboxanes, leukotrienes, platelet-activating factor, and nitric oxide on nociceptive primary afferent neurons. Manifestations, receptor molecules, and intracellular signaling mechanisms of the effects of these mediators are discussed in detail. With regard to signaling, most data reported have been obtained from transfected nonneuronal cells and somata of cultured sensory neurons as these structures are more accessible to direct study of sensory and signal transduction. The peripheral processes of sensory neurons, where painful stimuli actually affect the nociceptors in vivo, show marked differences with respect to biophysics, ultrastructure, and equipment with receptors and ion channels compared with cellular models. Therefore, an effort was made to highlight signaling mechanisms for which supporting data from molecular, cellular, and behavioral models are consistent with findings that reflect properties of peripheral nociceptive nerve endings. Identified molecular elements of these signaling pathways may serve as validated targets for development of novel types of analgesic drugs.
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Affiliation(s)
- Gábor Petho
- Pharmacodynamics Unit, Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Pécs, Pécs, Hungary
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Moreira V, Dos-Santos MC, Nascimento NG, Borges da Silva H, Fernandes CM, D'Império Lima MR, Teixeira C. Local inflammatory events induced by Bothrops atrox snake venom and the release of distinct classes of inflammatory mediators. Toxicon 2012; 60:12-20. [PMID: 22465491 DOI: 10.1016/j.toxicon.2012.03.004] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2011] [Revised: 02/27/2012] [Accepted: 03/06/2012] [Indexed: 12/11/2022]
Abstract
Bothrops atrox is responsible for most accidents involving snakes in the Brazilian Amazon and its venom induces serious systemic and local effects. The local effects are not neutralized effectively by commercial antivenoms, resulting in serious sequelae in individuals bitten by this species. This study investigates the local inflammatory events induced in mice by B. atrox venom (BaV), such as vascular permeability, leukocyte influx and the release of important inflammatory mediators such as cytokines, eicosanoids and the chemokine CCL-2, at the injection site. The effect of BaV on cyclooxygenase (COX-1 and COX-2) expression was also investigated. The results showed that intraperitoneal (i.p.) injection of BaV promoted a rapid and significant increase in vascular permeability, which reached a peak 1 h after venom administration. Furthermore, BaV caused leukocyte infiltration into the peritoneal cavity between 1 and 8 h after i.p. injection, with mononuclear leukocytes (MNs) predominating in the first 4 h, and polymorphonuclear leukocytes (PMNs) in the last 4 h. Increased protein expression of COX-2, but not of COX-1, was detected in leukocytes recruited in the first and fourth hours after injection of BaV. The venom caused the release of eicosanoids PGD₂, PGE₂, TXA₂ and LTB₄, cytokines TNF-α, IL-6, IL-10 and IL-12p70, but not IFN-γ, and chemokine CCL-2 at different times. The results show that BaV is able to induce an early increase in vascular permeability and a leukocyte influx to the injection site consisting mainly of MNs initially and PMNs during the later stages. These phenomena are associated with the production of cytokines, the chemokine CCL-2 and eicosanoids derived from COX-1 and COX-2.
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Affiliation(s)
- Vanessa Moreira
- Laboratório de Farmacologia, Instituto Butantan, Av. Vital Brazil, 1500, CEP 05503-900, Sao Paulo, SP, Brazil
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Nicolaou A, Masoodi M, Gledhill K, Haylett AK, Thody AJ, Tobin DJ, Rhodes LE. The eicosanoid response to high dose UVR exposure of individuals prone and resistant to sunburn. Photochem Photobiol Sci 2011; 11:371-80. [PMID: 22173231 DOI: 10.1039/c1pp05272a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
High personal UVR doses can be gained during leisure activities, causing intense self-resolving inflammation (sunburn) of unprotected skin. UVR activates release of membrane fatty acids and upregulates their metabolism by cyclooxygenases (COX) and lipoxygenases (LOX) to different eicosanoids. While COX-derived prostaglandin (PG)E(2) is a potent mediator of sunburn vasodilatation, LOX-derived 15-hydroxyeicosatetraenoic acid (HETE) and its lipoxin metabolites may contribute to sunburn limitation. We explored the relationships between expression of these lipid mediators and the clinical and histological outcomes, comparing responses of individuals prone and more resistant to sunburn. An acute UVR exposure of 12 SED (standard erythema dose) was applied to buttock skin of 32 white Caucasians (n = 16 phototype I/II, n = 16 phototype III/IV), and over the subsequent 72 h assessments were made of skin erythema, immunohistochemical expression of leukocyte markers, COX-2, 12-LOX, 15-LOX and nitric oxide synthase (NOS), and eicosanoid levels by LC/ESI-MS/MS. Evidence of a significant inflammatory response was seen earlier in phototype I/II with regard to expression of erythema (4 h, p < 0.001), neutrophil infiltration (24 h, p = 0.01), epidermal COX-2 (24 h, p < 0.05) and 12-LOX (24 h, p < 0.01), and dermal eNOS (24 h, p < 0.05) proteins, although CD3+ lymphocyte infiltration showed an earlier increase in phototype III/IV (24 h, p < 0.05). Although erythema was equivalent at 72 h in both groups, phototype I/II showed higher PGE(2) accompanied by elevated 15-HETE, and a strong positive correlation was seen between these mediators (n = 18, r = 0.805, p = 0.0001). Hence anti-inflammatory eicosanoid 15-HETE may temper the pro-inflammatory milieu in sunburn, having greater influence in those prone to sunburn than those more resistant, given the same high UVR exposure conditions.
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Affiliation(s)
- Anna Nicolaou
- Bradford School of Pharmacy, School of Life Sciences, University of Bradford, Richmond Road, Bradford, UK BD7 1DP.
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Blanco F, Ferreira AM, López GV, Bonilla L, González M, Cerecetto H, Trostchansky A, Rubbo H. 6-Methylnitroarachidonate: a novel esterified nitroalkene that potently inhibits platelet aggregation and exerts cGMP-mediated vascular relaxation. Free Radic Biol Med 2011; 50:411-8. [PMID: 21145389 DOI: 10.1016/j.freeradbiomed.2010.11.031] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2010] [Revised: 11/15/2010] [Accepted: 11/29/2010] [Indexed: 01/30/2023]
Abstract
Nitro-fatty acids represent endogenously occurring products of oxidant-induced nitration reactions. We have previously synthesized a mixture of four isomers of nitroarachidonic acid, a novel anti-inflammatory signaling mediator. In this study, we synthesized and chemically and biologically characterized for the first time an esterified nitroalkene derived from the nitration of methylarachidonate (AAMet): 6-methylnitroarachidonate (6-AAMetNO(2)). Synthesis was performed by reacting AAMet with sodium nitrite under acidic conditions. Analysis by mass spectrometry (positive-ion ESI-MS) showed an [M+H](+) ion of m/z 364, characteristic of AAMetNO(2). Fragmentation of this ion yielded a daughter ion at m/z 317, corresponding to the neutral loss of the nitro group ([M+H-HNO(2)](+)). Furthermore, IR signal at 1378 cm(-1) and NMR data confirmed the structure of a 6-nitro-positional isomer. This novel esterified nitroalkene was capable of promoting vascular protective actions including: (a) the induction of vasorelaxation via endothelium-independent mechanisms, associated with an increase in smooth muscle cell cGMP levels, and (b) a potent dose-dependent inhibition of human platelet aggregation. We postulate that 6-AAMetNO(2) could be a potential drug for the prevention of vascular and inflammatory diseases, and the presence of the methyl group may increase its pharmacological potential.
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Affiliation(s)
- Fabiana Blanco
- Department of Biophysics, Faculty of Chemistry Sciences, Universidad de República, 11800 Montevideo, Uruguay
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Trostchansky A, Bonilla L, Thomas CP, O'Donnell VB, Marnett LJ, Radi R, Rubbo H. Nitroarachidonic acid, a novel peroxidase inhibitor of prostaglandin endoperoxide H synthases 1 and 2. J Biol Chem 2011; 286:12891-900. [PMID: 21266582 PMCID: PMC3075636 DOI: 10.1074/jbc.m110.154518] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Prostaglandin endoperoxide H synthase (PGHS) catalyzes the oxidation of arachidonate to prostaglandin H2. We have previously synthesized and chemically characterized nitroarachidonic acid (AANO2), a novel anti-inflammatory signaling mediator. Herein, the interaction of AANO2 with PGHS was analyzed. AANO2 inhibited oxygenase activity of PGHS-1 but not PGHS-2. AANO2 exhibited time- and concentration-dependent inhibition of peroxidase activity in both PGHS-1 and -2. The plot of kobsversus AANO2 concentrations showed a hyperbolic function with kinact = 0.045 s−1 and Ki*app = 0.019 μm for PGHS-1 and kinact = 0.057 s−1 and Ki*app = 0.020 μm for PGHS-2. Kinetic analysis suggests that inactivation of PGHS by AANO2 involves two sequential steps: an initial reversible binding event (described by Ki) followed by a practically irreversible event (Ki*app) leading to an inactivated enzyme. Inactivation was associated with irreversible disruption of heme binding to the protein. The inhibitory effects of AANO2 were selective because other nitro-fatty acids tested, such as nitrooleic acid and nitrolinoleic acid, were unable to inhibit enzyme activity. In activated human platelets, AANO2 significantly decreased PGHS-1-dependent thromboxane B2 formation in parallel with a decrease in platelet aggregation, thus confirming the biological relevance of this novel inhibitory pathway.
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Affiliation(s)
- Andrés Trostchansky
- Departamento de Bioquímica and Center for Free Radical and Biomedical Research, Facultad de Medicina, Montevideo, Uruguay
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Busnardo TCPM, Padoani C, Mora TC, Biavatti MW, Fröde TS, Bürger C, Claudino VD, Dalmarco EM, de Souza MM. Anti-inflammatory evaluation of Coronopus didymus in the pleurisy and paw oedema models in mice. JOURNAL OF ETHNOPHARMACOLOGY 2010; 128:519-525. [PMID: 20026396 DOI: 10.1016/j.jep.2009.12.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2009] [Revised: 12/08/2009] [Accepted: 12/12/2009] [Indexed: 05/28/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Mastrunço (Coronopus didymus--CD) is currently considered as a medicinal specie often used in Brazil, especially in southeast region, for the treatment of several diseases in which pain and inflammation are common. Treatment with the plant can be done by infusion, decoction, or through food. The aim of this study was: to investigate the anti-inflammatory effect of hydroalcoholic extract obtained from the leaves of CD following the traditional procedure. MATERIALS AND METHODS The anti-inflammatory activity was determined using mouse of pleurisy and paw oedema models, both process being induced by different flogistic agents such as: carrageenan (Cg), bradykinin (BK), histamine (HIS), substance P (SP), dextran (DEX) or prostaglandin E(2) (PGE(2)). We evaluated the effect of CD (200-600 mg/kg) administered by oral route (p.o.) upon leukocytes migration, myeloperoxidase (MPO), and adenosine-deaminase (ADA) activities and nitric oxide (NO) levels. RESULTS CD (200-600 mg/kg) inhibited the leukocytes by 60.0+/-1.42%, neutrophils by 82.75+/-1.29%, MPO by 42.30+/-4.23%, and ADA activities by 57.89+/-1.94%, as well as NO levels by 64.28+/-2.15% in Cg induced pleurisy. CD also inhibited total and differential leukocytes in the pleurisy induced by BK (1.30+/-0.11/0.29+/-0.02), HIS (1.20+/-0.09/0.42+/-0.05) and SP (0.74+/-0.06/0.14+/-0.01). In addition, CD was effective in reducing paw oedema induced by Cg by 72.79+/-1.13%, SP by 68.26.+/-0.78%, BK by 66.66.+/-0.77%, PGE(2) by 53.346.+/-1.18 and DEX by 65.14+/-2.35%. CONCLUSION Several mechanisms, including the inhibition of enzymes (MPO and ADA) and mediators (BK, HIS, SP, NO and PGE(2)) release and/or action, appear to account for the anti-inflammatory effect of Coronopus didymus.
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Emami SA, Taghizadeh Rabe SZ, Iranshahi M, Ahi A, Mahmoudi M. Sesquiterpene lactone fraction fromArtemisia khorassanicainhibits inducible nitric oxide synthase and cyclooxygenase-2 expression through the inactivation of NF-κB. Immunopharmacol Immunotoxicol 2010; 32:688-95. [DOI: 10.3109/08923971003677808] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Dutra RC, Fava MB, Alves CCS, Ferreira AP, Barbosa NR. Antiulcerogenic and anti-inflammatory activities of the essential oil from Pterodon emarginatus seeds. J Pharm Pharmacol 2010. [DOI: 10.1211/jpp.61.02.0015] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Objectives
The objective of this work was to investigate the antiulcerogenic and anti-inflammatory activities of the essential oil from Pterodon emarginatus seeds.
Methods
The following tests were used: ulcers induced by ethanol, indometacin and HCl/ethanol, and pleurisy induced by carrageenan in Swiss albino rats. The rats were treated by the oral route with essential oil of P. emarginatus seeds.
Key findings
The essential oil at 100, 300 and 500 mg/kg exhibited significant protection against ulcers induced by ethanol, indometacin and HCl/ethanol (P < 0.001). The essential oil caused a marked reduction in the exudate volume and inhibited leucocyte and neutrophil influx (P < 0.05) in carrageenan-induced pleurisy. Moreover, the essential oil significantly decreased nitric oxide (NO) and interleukin-1 (IL-1) levels, without affecting tumour necrosis factor-α production.
Conclusions
The results demonstrated the marked antiulcerogenic and anti-inflammatory effects of the essential oil from P. emarginatus, which are, at least in part, a consequence of NO and IL-1 modulation. P. emarginatus or its constituents might represent new therapeutic options to treat gastric ulcers and inflammatory diseases.
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Affiliation(s)
- Rafael C Dutra
- Núcleo de Identificação e Quantificação Analítica, Faculdade de Farmácia e Bioquímica, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Marcelo B Fava
- Núcleo de Identificação e Quantificação Analítica, Faculdade de Farmácia e Bioquímica, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Caio C S Alves
- Laboratório de Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Ana P Ferreira
- Laboratório de Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
| | - Nádia R Barbosa
- Núcleo de Identificação e Quantificação Analítica, Faculdade de Farmácia e Bioquímica, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
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Liao PL, Cheng YW, Li CH, Lo YL, Kang JJ. Cholesterol-3-beta, 5-alpha, 6-beta-triol induced PI3K-Akt-eNOS-dependent cyclooxygenase-2 expression in endothelial cells. Toxicol Lett 2009; 190:172-8. [DOI: 10.1016/j.toxlet.2009.07.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2009] [Revised: 07/06/2009] [Accepted: 07/08/2009] [Indexed: 10/20/2022]
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21
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Minamikawa H, Deyama Y, Nakamura K, Yoshimura Y, Kaga M, Suzuki K, Yawaka Y. Effect of mineral trioxide aggregate on rat clonal dental pulp cells: expression of cyclooxygenase-2 mRNA and inflammation-related protein via nuclear factor kappa B signaling system. J Endod 2009; 35:843-6. [PMID: 19482183 DOI: 10.1016/j.joen.2009.03.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2008] [Revised: 03/06/2009] [Accepted: 03/06/2009] [Indexed: 01/22/2023]
Abstract
INTRODUCTION Recently, mineral trioxide aggregate (MTA) has been routinely used for endodontic treatment. It is well-known that MTA induced secondary dentin formation in pulp cavity when it was applied to dentin, whereas its cytotoxicities were unclear. The purpose of this study was to evaluate the effect of MTA on rat clonal dental pulp cells, RPC-C2A. METHODS This study was conducted to observe the response of RPC-C2A cells on MTA with reverse-transcriptase polymerase chain reaction, Western blot analysis, and enzyme immunoassay. Data were compared by analysis of variance. Statistical significance was established at P <.01. RESULTS MTA significantly caused an up-regulation of cyclooxygenase-2 (COX-2) and inducible form of nitric oxide synthase (iNOS) mRNA expression. Furthermore, MTA caused inhibitory kappa B (IkappaB) phosphorylation and translocation of nuclear factor-kappa B (NF-kappaB) subunits to nucleus. Curucumin, an inhibitor of NF-kappaB activation, suppressed MTA-induced COX-2 and iNOS mRNA expressions. In addition, MTA increased the production of prostaglandin E(2) in comparison with the controls. CONCLUSIONS MTA induces inflammation via NF-kappaB signaling system.
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Affiliation(s)
- Hajime Minamikawa
- Department of Pediatric Dentistry, Graduate School of Dental Medicine, Hokkaido University, Sapporo, Japan
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22
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Cristiano MP, Cardoso DC, da Silva Paula MM, Costa-Campos L. Antinociceptive effect of a ruthenium complex in mice. ACTA ACUST UNITED AC 2008; 28:103-8. [DOI: 10.1111/j.1474-8673.2008.00423.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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23
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Iuvone T, De Filippis D, Di Spiezio Sardo A, D'Amico A, Simonetti S, Sparice S, Esposito G, Bifulco G, Insabato L, Nappi C, Guida M. Selective CB2 up-regulation in women affected by endometrial inflammation. J Cell Mol Med 2008; 12:661-70. [PMID: 18419603 PMCID: PMC3822551 DOI: 10.1111/j.1582-4934.2007.00085.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Endometritis is defined as an inflammation of the endometrial mucosa of the uterus. In endometritis large amounts of toxic mediators, including nitric oxide (NO) are released by inflammatory cells. As a consequence of nitric oxide-dependent injury, the cells respond by triggering protective mechanisms, by changing the endocannabinoid system (ECS) which comprises both CB(1) and CB(2) cannabinoid receptors and their endogenous ligands. The aim of our study was to seek out evidence for the presence of cannabinoid receptors in inflammatory endometrial tissue as well as for their potential role in endometrial inflammation. Our results showed a selective up-regulation of both transcription and expression of CB(2) receptors in biopsies from women affected by endometrial inflammation compared to healthy women. The experiments with the nitric oxide-donor S-Nitroso-L-Glutathione (GSNO) suggest that such a selective up-regulation may be related to the nitric oxide release occurring during endometrial inflammation. In addition, we demonstrated an increase in chymase expression, a marker of mast cells, in biopsies of women affected by endometritis. Therefore our results support the hypothesis that the up-regulation of CB(2) occurs mainly on mast cells and that it might tend to sensitize these cells to the anti-inflammatory effect exerted by endogenous cannabinoids by binding their receptor and thus preventing the mast cell degranulation and the release of pro-inflammatory mediators. In conclusion, we believe that the selective CB(2) up-regulation might play a role as a novel prognostic factor in endometrial inflammation.
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Affiliation(s)
- Teresa Iuvone
- Endocannabinoid Research Group, Department of Experimental Pharmacology, Faculty of Pharmacy, University of Naples, Federico II, Naples, Italy.
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Tucci P, Palmery M, Piccolotti P, Pimpinella G, Valeri P, Romanelli L. Counteracting effect of papaverine on morphine inhibition of gastrointestinal transit in mice. Neurogastroenterol Motil 2008; 20:958-65. [PMID: 18363637 DOI: 10.1111/j.1365-2982.2008.01103.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Oral papaverine has been shown to be capable of antagonizing the constipation induced by a single dose of oral morphine. The primary aim of the present study was to ascertain whether papaverine is also capable of counteracting morphine-induced decrease of upper gastrointestinal transit (UGT) after repeated parenteral administration of the opioid. We next investigated the mechanisms(s) responsible for the counteracting effect of papaverine, by analysing whether this effect was changed by pretreatment with N(G)-nitro-L-arginine methyl ester (L-NAME), dexamethasone, indomethacin or capsaicin. Papaverine, co-administered with morphine, counteracted the morphine-induced decrease in UGT in mice pretreated with morphine for 3 days but did not do so in naive animals. The counteracting effect of papaverine was antagonized by L-NAME, but not by indomethacin. In mice pretreated with both morphine and dexamethasone, papaverine failed to antagonize the effect of morphine. Capsaicin pretreatment completely abolished the effect of a single dose of morphine, the effect being partially restored by the 3 days pretreatment with morphine. In mice pretreated with both capsaicin and morphine, the UGT decrease elicited by morphine was lower than in the other experimental groups and was not modified by papaverine. Our results show that papaverine can counteract the morphine inhibition of UGT in mice repeatedly exposed to the opioid. Papaverine exerts its action through a nitric oxide synthase-mediated mechanism; this mechanism is only effective after repeated morphine administration and does not operate when capsaicin-sensitive afferent neurones are ablated.
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Affiliation(s)
- P Tucci
- Department of Biomedical Sciences, University of Foggia, School of Medicine, Foggia, Italy.
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Trostchansky A, Rubbo H. Nitrated fatty acids: mechanisms of formation, chemical characterization, and biological properties. Free Radic Biol Med 2008; 44:1887-96. [PMID: 18395528 DOI: 10.1016/j.freeradbiomed.2008.03.006] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2007] [Revised: 03/03/2008] [Accepted: 03/07/2008] [Indexed: 10/22/2022]
Abstract
Nitrated derivatives of unsaturated fatty acids are formed under oxidative and nitrative stress conditions, and are detected and structurally characterized in cell membranes, cardiac tissue, human plasma, and urine. Nitro-fatty acids display pleiotropic activities, including modulation of macrophage activation, prevention of leukocyte and platelet activation, and promotion of blood vessel relaxation. However, mechanisms of formation and levels reached in inflammatory milieu are poorly characterized. In this review, we discuss potential mechanisms of formation of nitro-fatty acids and their key chemical and biochemical properties. A major focus is to analyze nitrated lipids as novel signaling mediators leading to secondary changes in protein function via electrophilic-based modifications as well as inhibition of inflammatory cell function, thus representing the convergence of lipid and nitric oxide signaling pathways.
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Affiliation(s)
- Andrés Trostchansky
- Departamento de Bioquímica and Center for Free Radical and Biomedical Research, Facultad de Medicina, Universidad de la República, General Flores 2125, Montevideo, Uruguay CP 11800
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Choy CS, Hu CM, Chiu WT, Lam CSK, Ting Y, Tsai SH, Wang TC. Suppression of lipopolysaccharide-induced of inducible nitric oxide synthase and cyclooxygenase-2 by Sanguis Draconis, a dragon's blood resin, in RAW 264.7 cells. JOURNAL OF ETHNOPHARMACOLOGY 2008; 115:455-462. [PMID: 18060707 DOI: 10.1016/j.jep.2007.10.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2007] [Revised: 10/08/2007] [Accepted: 10/14/2007] [Indexed: 05/25/2023]
Abstract
Sanguis Draconis (SD) is a kind of dragon's blood resin that is obtained from Daemomorops draco (Palmae). It is used in traditional medicine and has shown anti-inflammatory activity in some diseases. In this study, we examined the effects of Sanguis Dranonis ethanol extract (SDEE) on LPS-induced inflammation using RAW 264.7 cells. Our data indicated that SDEE inhibits LPS-stimulated NO, PGE2, IL-1 beta and TNF-alpha release, and iNOS and COX-2 expression. Furthermore, SDEE suppressed the LPS-induced p65 expression of NF-kappa B, which was associated with the inhibition of I kappa B-alpha degradation. We also found that the expression of HO-1 was significantly increased in RAW 264.7 cells by SDEE. These results suggest among possibilities of anti-inflammation that SDEE inhibits the production of NO and PGE2 by the down-regulation of iNOS and COX-2 gene expression via the suppression of NF-kappaB (p65) activation. SDEE can induce HO-1 over-expression in macrophage cells, which indicates that it may possess antioxidant properties. This result means that SEDD its anti-inflammatory effects in macrophages may be through a novel mechanism that involves the action of HO-1. Thus, SD could provide a potential therapeutic approach for inflammation-associated disorders.
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Affiliation(s)
- Cheuk-Sing Choy
- Emergency Department of Municipal Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan, ROC
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27
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Fernandes DC, Regasini LO, Vellosa JCR, Pauletti PM, Castro-gamboa I, Bolzani VS, Oliveira OMM, Silva DHS. Myeloperoxidase Inhibitory and Radical Scavenging Activities of Flavones from Pterogyne nitens. Chem Pharm Bull (Tokyo) 2008; 56:723-6. [DOI: 10.1248/cpb.56.723] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Daniara Cristina Fernandes
- NuBBE-Núcleo de Bioensaios, Biossíntese e Ecofisiologia de Produtos Naturais, Department of Organic Chemistry, Institute of Chemistry, UNESP-São Paulo State University
| | - Luis Octávio Regasini
- NuBBE-Núcleo de Bioensaios, Biossíntese e Ecofisiologia de Produtos Naturais, Department of Organic Chemistry, Institute of Chemistry, UNESP-São Paulo State University
| | | | - Patrícia Mendonça Pauletti
- Department of Biochemistry and Chemical Technology, Institute of Chemistry, UNESP-São Paulo State University
| | - Ian Castro-gamboa
- NuBBE-Núcleo de Bioensaios, Biossíntese e Ecofisiologia de Produtos Naturais, Department of Organic Chemistry, Institute of Chemistry, UNESP-São Paulo State University
| | - Vanderlan Silva Bolzani
- NuBBE-Núcleo de Bioensaios, Biossíntese e Ecofisiologia de Produtos Naturais, Department of Organic Chemistry, Institute of Chemistry, UNESP-São Paulo State University
| | | | - Dulce Helena Siqueira Silva
- NuBBE-Núcleo de Bioensaios, Biossíntese e Ecofisiologia de Produtos Naturais, Department of Organic Chemistry, Institute of Chemistry, UNESP-São Paulo State University
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Kim HG, Yoon DH, Lee WH, Han SK, Shrestha B, Kim CH, Lim MH, Chang W, Lim S, Choi S, Song WO, Sung JM, Hwang KC, Kim TW. Phellinus linteus inhibits inflammatory mediators by suppressing redox-based NF-kappaB and MAPKs activation in lipopolysaccharide-induced RAW 264.7 macrophage. JOURNAL OF ETHNOPHARMACOLOGY 2007; 114:307-315. [PMID: 17936530 DOI: 10.1016/j.jep.2007.08.011] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2007] [Revised: 07/22/2007] [Accepted: 08/03/2007] [Indexed: 05/25/2023]
Abstract
The mushroom Phellinus linteus has been known to exhibit potent biological activity. In contrast to the immuno-potentiating properties of Phellinus linteus, the anti-inflammatory properties of Phellinus linteus have rarely been investigated. Recently, ethanol extract and n-BuOH fractions from Phellinus linteus were deemed most effective in anti-inflammatory activity in RAW 264.7 macrophages. The regulatory mechanisms of Phellinus linteus butanol fractions (PLBF) on the pharmacological and biochemical actions of macrophages involved in inflammation have not been clearly defined yet. In the present study, we tested the role of PLBF on anti-inflammation patterns in lipopolysaccharide (LPS)-stimulated RAW 264.7 macrophage cells. To investigate the mechanism by which PLBF inhibits NO and PGE2 production as well as inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) expression, we examined the activation of IkappaB and MAPKs in LPS-activated macrophages. PLBF clearly inhibited nuclear translocation of NF-kappaB p65 subunits, which correlated with PLBF's inhibitory effects on IkappaBalpha phosphorylation and degradation. PLBF also suppressed the activation of mitogen-activated protein (MAP) kinases including p38 and stress-activated protein kinase/c-Jun NH2-terminal kinase (SAPK/JNK). Furthermore, macrophages stimulated with LPS generated ROS via activation of membrane-bound NADPH oxidase, and ROS played an important role in the activation of nuclear factor-kappaB (NF-kappaB) and MAPKs. We demonstrated that PLBF directly blocked intracellular accumulation of reactive oxygen species in RAW 264.7 cells stimulated with LPS much as the NADPH oxidase inhibitors, diphenylene iodonium, and antioxidant pyrrolidine dithiocarbamate did. The suppression of NADPH oxidase also inhibited NO production and iNOS protein expression. Cumulatively, these results suggest that PLBF inhibits the production of NO and PGE2 through the down-regulation of iNOS and COX-2 gene expression via ROS-based NF-kappaB and MAPKs activation. Thus, PLBF may provide a potential therapeutic approach for inflammation-associated disorders.
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Affiliation(s)
- Ho Gyoung Kim
- Department of Biochemistry and Research Institute of Life Sciences, Kangwon National University, Chuncheon 200-701, Republic of Korea
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Maçao LB, Wilhelm Filho D, Pedrosa RC, Pereira A, Backes P, Torres MA, Fröde TS. Antioxidant therapy attenuates oxidative stress in chronic cardiopathy associated with Chagas' disease. Int J Cardiol 2007; 123:43-9. [PMID: 17328977 DOI: 10.1016/j.ijcard.2006.11.118] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2006] [Accepted: 11/12/2006] [Indexed: 12/31/2022]
Abstract
Oxidative stress is common in inflammatory processes of many diseases, including the Chagas' disease, which is characterized by chronic inflammation. The present study is a sequence of a related publication [Oliveira TB, Pedrosa RC, Wilhelm Filho D. Oxidative stress in chronic cardiopathy associated with Chagas' disease. Int J Cardiol in press.] on the same subjects, which showed an increase in oxidative stress associated with the progression of the severity of the disease. Components of the antioxidant system and oxidative biomarkers present in the blood were measured in the same chronic chagasic patients (n=40), before and after vitamin E (800 IU/day) and vitamin C (500 mg/day) supplementation for 6 months. Antioxidant enzymes and contents of reduced glutathione in erythrocytes and plasma TBARS contents were analyzed in four groups of patients in different stages of chronic Chagas heart disease (n=10 each group, groups I, II, III, and IV) according to the Los Andes classification. After the combined vitamin supplementation, TBARS and protein carbonyl levels were decreased in plasma, whilst red cell GSH contents were increased in group I. The vitamin E contents found in the plasma were inversely related to the severity of the disease. No differences in gamma-glutamiltransferase activities were detected but the myeloperoxidase levels were decreased in patients at the initial stages, whilst seric nitric oxide levels were increased in groups II and III. After the antioxidant supplementation, CAT activity was increased in group II, GPx activity was increased in group I, GR activity was increased in groups I and II, whilst the GST activity was decreased in groups II, III and IV. The results clearly indicate that the antioxidant supplementation was able to counteract the progressive oxidative stress associated with the disease. New perspectives for the treatment of Chagas' disease might include an antioxidant therapy in order to attenuate the consequences of oxidative insult related to this disease.
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Affiliation(s)
- Leonilda Banki Maçao
- Departamento Ecologia e Zoologia, Universidade Federal de Santa Catarina, Florianópolis, Brazil
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Goulart S, Moritz MIG, Lang KL, Liz R, Schenkel EP, Fröde TS. Anti-inflammatory evaluation of Solidago chilensis Meyen in a murine model of pleurisy. JOURNAL OF ETHNOPHARMACOLOGY 2007; 113:346-53. [PMID: 17686594 DOI: 10.1016/j.jep.2007.07.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2007] [Accepted: 07/01/2007] [Indexed: 05/16/2023]
Abstract
UNLABELLED The aim of this study was to investigate the anti-inflammatory effects and the mechanism of action of the aqueous extracts obtained from rhizomes, leaves and inflorescences of Solidago chilensis in the mouse model of pleurisy. The extracts were prepared by infusion and were lyophilized. RESULTS The aqueous extracts of rhizomes, leaves or inflorescences inhibited leukocytes, neutrophils and exudation (P<0.05) in the inflammation induced by carrageenan. The rhizomes aqueous extract, butanolic and aqueous residual fractions inhibited leukocytes, neutrophils, myeloperoxidase, adenosine-deaminase, and tumor necrosis factor alpha levels in the inflammation induced by carrageenan (P<0.05). The rhizome aqueous extract and butanolic fraction also inhibited exudation, nitric oxide, and interleukin-1 beta levels (P<0.05). The rhizomes aqueous extract and its two derived fractions reduced leukocytes and mononuclears in the pleurisy induced by bradykinin, histamine, or substance P (P<0.05) and neutrophils in the pleurisy induced by histamine or substance P (P<0.05). Only aqueous residual fraction inhibited neutrophils induced by bradykinin (P<0.05). CONCLUSION Solidago chilensis aqueous extracts from leaves, inflorescences and rhizomes demonstrated an important anti-inflammatory effect, inhibiting cells in the inflammation caused by carrageenan. In addition, the rhizomes aqueous extract and its derived fractions also decreased pro-inflammatory mediators release into the site of the inflammatory process. The rhizomes aqueous extract and the butanolic fraction showed more evident anti-inflammatory actions.
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Affiliation(s)
- Stella Goulart
- Department of Clinical Analysis, Centre of Health Sciences, Federal University of Santa Catarina, Campus Universitário-Trindade, 88040-970 Florianópolis, SC, Brazil
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31
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Herradón E, Martín MI, López-Miranda V. Characterization of the vasorelaxant mechanisms of the endocannabinoid anandamide in rat aorta. Br J Pharmacol 2007; 152:699-708. [PMID: 17704831 PMCID: PMC2190007 DOI: 10.1038/sj.bjp.0707404] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND AND PURPOSE Studies in isolated preparations of vascular tissue (mainly resistance vessels) provide evidence that anandamide exerts vasorelaxation. The aim of the present work was to further characterize the mechanisms involved in the vascular response induced by anandamide in a conduit vessel, rat aorta. EXPERIMENTAL APPROACH Isometric tension changes in response to a cumulative concentration-response curve of anandamide (1 nM-100 micro M) were recorded in aortic rings from male Wistar rats. The involvement of a number of factors in this relaxation was investigated including endothelium-derived vasorelaxant products, cannabinoid and vanilloid receptors (transient potential vanilloid receptor-1 (TRPV1)), release of calcitonin gene-related peptide (CGRP), anandamide metabolism and the membrane transporter for anandamide. KEY RESULTS Anandamide caused a significant concentration-dependent vasorelaxation in rat aorta. This vasorelaxation was significantly inhibited by Pertussis toxin, by a non-CB1/non-CB2 cannabinoid receptor antagonist, by endothelial denudation, by inhibition of nitric oxide synthesis or inhibition of prostanoid synthesis via cyclooxygenase-2 (COX-2), by blockade of prostaglandin receptors EP4 and by a fatty acid amino hydrolase inhibitor. Antagonists for CB1, CB2, TRPV1 or CGRP receptors, an inhibitor of the release of endothelium-derived hyperpolarizing factor, and an inhibitor of anandamide transport did not modify the vascular response to anandamide. CONCLUSIONS AND IMPLICATIONS Our results demonstrate, for the first time, the involvement of the non-CB1/non-CB2 cannabinoid receptor and an anandamide-arachidonic acid-COX-2 derived metabolite (which acts on EP4 receptors) in the endothelial vasorelaxation caused by anandamide in rat aorta.
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MESH Headings
- Animals
- Aorta, Abdominal/drug effects
- Aorta, Abdominal/physiology
- Apamin/pharmacology
- Arachidonic Acids/pharmacology
- Benzamides/pharmacology
- Calcitonin Gene-Related Peptide/pharmacology
- Camphanes/pharmacology
- Cannabinoid Receptor Modulators/pharmacology
- Capsaicin/analogs & derivatives
- Capsaicin/pharmacology
- Carbamates/pharmacology
- Charybdotoxin/pharmacology
- Dose-Response Relationship, Drug
- Endocannabinoids
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/physiology
- In Vitro Techniques
- Indomethacin/pharmacology
- Isoindoles/pharmacology
- Male
- NG-Nitroarginine Methyl Ester/pharmacology
- Nitric Oxide/antagonists & inhibitors
- Nitric Oxide/biosynthesis
- Peptide Fragments/pharmacology
- Piperidines/pharmacology
- Polyunsaturated Alkamides/pharmacology
- Pyrazoles/administration & dosage
- Pyrazoles/pharmacology
- Rats
- Rats, Wistar
- Receptor, Cannabinoid, CB1/antagonists & inhibitors
- Receptor, Cannabinoid, CB2/antagonists & inhibitors
- Rimonabant
- Sulfonamides/pharmacology
- Vasodilation/drug effects
- Vasodilation/physiology
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Affiliation(s)
- E Herradón
- Área de Farmacología, Dpto. Ciencias de la Salud III, Facultad Ciencias de la Salud, Universidad Rey Juan Carlos, Alcorcón Madrid, Spain
| | - M I Martín
- Área de Farmacología, Dpto. Ciencias de la Salud III, Facultad Ciencias de la Salud, Universidad Rey Juan Carlos, Alcorcón Madrid, Spain
| | - V López-Miranda
- Área de Farmacología, Dpto. Ciencias de la Salud III, Facultad Ciencias de la Salud, Universidad Rey Juan Carlos, Alcorcón Madrid, Spain
- Author for correspondence:
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Cebral E, Faletti A, Jawerbaum A, Paz D. Periconceptional alcohol consumption-induced changes in embryonic prostaglandin E levels in mouse organogenesis: modulation by nitric oxide. Prostaglandins Leukot Essent Fatty Acids 2007; 76:141-51. [PMID: 17276049 DOI: 10.1016/j.plefa.2006.12.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2006] [Revised: 12/07/2006] [Accepted: 12/08/2006] [Indexed: 11/23/2022]
Abstract
The mechanisms of the teratogenic effects of maternal alcohol consumption remain unclear. The aim of the present work was to study the organogenic PGE(2) levels and the modulation of PGE(2) levels by NO after periconceptional alcohol ingestion. Female mice were intoxicated with a 10% ethanol in drinking water before pregnancy and up to day 10 of gestation. The PGE(2) released from organogenic embryos was measured by radio immunoassay following incubation with or without the addition of either a NO donor or a NO synthase (NOS) inhibitor. In the ethanol-treated females, we found increased percentages of retarded embryos, associated with a significantly elevated resorption rate (p<0.05), very high quantities of morphologically abnormal E.10 embryos (p<0.001) and significantly increased PGE(2) release, as compared to the embryo parameters of control females. While in the control-derived E.10 embryos the NO donor produced significantly increased PGE(2) release, in the ethanol-derived embryos decreased quantities of PGE(2) were observed. L-NMMA inhibited PGE(2) release in both control and ethanol-derived embryos at different concentrations, whereas it decreased PGE(2) content in controls but not in ethanol-derived embryos. The periconceptional alcohol ingestion produced excessive PGE(2) release, decreased PGE(2) content and disruption of the regulatory NO-PGE(2) pathways. These PGs alterations may be related to delayed organogenesis and abnormal neural tube development after chronic periconceptional consumption of alcohol.
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Affiliation(s)
- Elisa Cebral
- Laboratorio de Biología del Desarrollo, Instituto de Fisiología, Biología Molecular y Neurociencias, DBBE, Facultad de Ciencias Exactas y Naturales-UBA, Ciudad Universitaria, CBA, Buenos Aires, Argentina.
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33
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Montanher AB, Zucolotto SM, Schenkel EP, Fröde TS. Evidence of anti-inflammatory effects of Passiflora edulis in an inflammation model. JOURNAL OF ETHNOPHARMACOLOGY 2007; 109:281-8. [PMID: 16949230 DOI: 10.1016/j.jep.2006.07.031] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2006] [Revised: 05/17/2006] [Accepted: 07/26/2006] [Indexed: 05/11/2023]
Abstract
UNLABELLED The popular medicine Passiflora edulis has been used as a sedative, tranquilizer, against cutaneous inflammatory diseases and intermittent fever. Most of the pharmacological investigations of Passiflora edulis have been addressed to its Central Nervous System activities, such as anxiolytic, anticonvulsant and sedative actions. Otherwise, there are few reports about the anti-inflammatory activity of the Passiflora species. The aim of this study was to investigate the mechanism of the anti-inflammatory effect of aqueous lyophilized extract obtained from leaves of Passiflora edulis var. flavicarpa Degener (Passifloraceae) in the mouse model of pleurisy induced by carrageenan (Cg), bradykinin, histamine or substance P, observing the effects upon leucocytes migration, myeloperoxidase (MPO), nitric oxide (NO) concentrations and tumor necrosis factor-alpha (TNFalpha) and interleukin-1 beta (IL-1beta) levels. RESULTS Passiflora edulis (250mg/kg) administered by intraperitoneal route (i.p.) inhibited the leukocyte, neutrophils, myeloperoxidase, nitric oxide, TNFalpha and IL-1beta levels (P<0.01) in the pleurisy induced by carrageenan. Passiflora edulis (250-500mg/kg, i.p.) also inhibited total and differential leukocytes in the pleurisy induced by bradykinin, histamine or substance P (P<0.05). CONCLUSION Several mechanisms, including the inhibition of pro-inflammatory cytokines (TNFalpha, IL-1beta), enzyme (myeloperoxidase) and mediators (bradykinin, histamine, substance P, nitric oxide) release and/or action, appear to account for Passiflora edulis's actions.
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Affiliation(s)
- Ana Beatriz Montanher
- Department of Clinical Analysis, Center of Health Sciences, Federal University of Santa Catarina, Campus Universitário, Trindade, 88040-970 Florianópolis, SC, Brazil
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Pereira FO, Frode TS, Medeiros YS. Evaluation of tumour necrosis factor alpha, interleukin-2 soluble receptor, nitric oxide metabolites, and lipids as inflammatory markers in type 2 diabetes mellitus. Mediators Inflamm 2007; 2006:39062. [PMID: 16864902 PMCID: PMC1570394 DOI: 10.1155/mi/2006/39062] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
This study compared the results of tumour necrosis factor alpha (TNF-α), interleukin-2 soluble receptor (sIL-2R), nitric oxide
metabolites (NOx), C-reactive protein (CRP), and lipids (total cholesterol, high-density lipoprotein (HDL-cholesterol), lowdensity
lipoprotein (LDL-cholesterol), and triglycerides) between control group (nondiabetic subjects) and overweight type 2
DM subjects. To restrict the influence of variables that could interfere in the interpretation of data, subjects with obesity and/or
acute or chronic inflammatory disease, haemoglobinopathies, recent use of antibiotics, antiinflammatory drugs, and trauma were
excluded. Type 2 DM patients (n = 39; age 53.3 ± 9.0 years; median glycated haemoglobin A1c < 8%) presented higher
levels of TNF-α, triglycerides (P < .01), NOx and sIL-2R (P < .05) than control group (n = 28; age 39.7 ± 14.1 years). CRP, LDL-cholesterol,
total cholesterol, and HDL-cholesterol did not differ among groups. Diabetic women
(n = 21) had higher levels of TNF-α, total
cholesterol, LDL-cholesterol, and HDL-cholesterol than diabetic
men (n = 18) (P < .05), but there were no differences among
sexes in the control group. This study indicates that increased level of proinflammatory markers occurs in type 2 DM even in the
absence of obesity and marked hyperglycaemia, confirming that the inflammation course of the atherosclerotic process is more
severe in diabetic patients than in nondiabetic subjects.
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Affiliation(s)
- Flávia Ozorio Pereira
- Diabetes Unit, Governador Celso Ramos Hospital, 88020-30 Florianópolis, Santa Catarina, Brazil
- *Flávia Ozorio Pereira:
| | - Tânia Silvia Frode
- Department of Clinical Analysis, Sciences, and Health Center, Federal University of Santa Catarina, 88040-970 Florianópolis,
Santa Catarina, Brazil
| | - Yara Santos Medeiros
- Diabetes Unit, Governador Celso Ramos Hospital, 88020-30 Florianópolis, Santa Catarina, Brazil
- Department of Pharmacology, Center of Biological Sciences, Federal University of Santa Catarina, 88049-900 Florianópolis,
Santa Catarina, Brazil
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Li J, Song L, Zhang D, Wei L, Huang C. Knockdown of NFAT3 blocked TPA-induced COX-2 and iNOS expression, and enhanced cell transformation in Cl41 cells. J Cell Biochem 2006; 99:1010-20. [PMID: 16475165 DOI: 10.1002/jcb.20834] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The nuclear factor of activated-T-cells (NFAT) family is a ubiquitous transcription factor that mediates regulation on various gene expressions. Recent studies indicate that NFAT may implicate in cancer process, mainly through its direct regulation on the cyclooxygenase-2 (COX-2) gene expression. There is also evidence suggesting another aspect of NFAT in tumor suppression. However, the according mechanism remains unknown. In this study, we used a small interfering RNA (siRNA) expression construct to study the role of NFAT3 in the 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced cell transformation with the tumor promotion-sensitive mouse epidermal Cl41 cells. Our results showed that TPA was able to induce NFAT3 activation in Cl41 cells. Stable transfection of NFAT3 siRNA specifically reduced endogenous NFAT3 expression. At the same time, TPA-induced expression of both COX-2 and inducible nitric oxide synthase (iNOS) were blocked. However, anchorage-independent transformation in response to TPA was significantly enhanced in NFAT3 siRNA stable transfectants as compared with vector transfectants. Moreover, treatment with the iNOS specific inhibitor aminoguanidine (AG) also enhanced Cl41 cells transformation induced by TPA. As COX-2 expression is proved to be required for cell transformation in Cl41 cells in our recent studies, our results demonstrate that the inducible NFAT3-mediated iNOS upregulation represents a novel potent tumor-suppressing pathway and may contribute to the tumor suppressor functions of NFAT protein.
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Affiliation(s)
- Jingxia Li
- Nelson Institute of Environmental Medicine, New York University School of Medicine, Tuxedo, New York 10987, USA
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36
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Moreira V, Zamuner SR, Wallace JL, Teixeira CDFP. Bothrops jararaca and Crotalus durissus terrificus venoms elicit distinct responses regarding to production of prostaglandins E2 and D2, and expression of cyclooxygenases. Toxicon 2006; 49:615-24. [PMID: 17241651 DOI: 10.1016/j.toxicon.2006.09.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2006] [Revised: 09/04/2006] [Accepted: 09/11/2006] [Indexed: 12/31/2022]
Abstract
Prostaglandins (PGs), synthesized by cyclooxygenases, play important roles in many pathophysiological processes including inflammation and hyperalgesia. In this study the profiles of PGE(2) and PGD(2) production secondary to injection of Bothrops jararaca venom (BjV), with inflammatory activity or Crotalus durissus terrificus venom (CdtV), with anti-inflammatory and antinociceptive properties, into mice were evaluated, and the ability of these venoms to induce expression of cyclooxygenases-1 (COX-1) and -2 (COX-2) was investigated. Intraperitoneal injection of BjV but not of CdtV induced the release and PGD(2) at 30 min and of PGE(2) from 3 up to 12 h after injection. Moreover, BjV up-regulated expression of COX-2 but not of the constitutive COX-1, suggesting that expressed COX-2 provides more substrate for synthesis of PGs by the respective terminal synthases, being the critical enzyme for PGs production in the late periods of BjV effect. In contrast, CdtV does not have any effect on constitutive COX-1 and do not induce expression of COX-2. Therefore, differences between BjV and CdtV in the ability to regulate PGs synthesis can account for their distinct effects with regard to inflammation. Moreover, inhibition of COX-2 by selective drugs may be of value to counteract the severe local inflammation induced by BjV in the victims.
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Affiliation(s)
- Vanessa Moreira
- Laboratory of Pharmacology, Butantan Institute, Ave Vital Brazil, 1500, 05503-900 Sao Paulo, Brazil
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Nieri P, Martinelli C, Blandizzi C, Bernardini N, Greco R, Ippolito C, Del Tacca M, Breschi MC. Role of cyclooxygenase isoforms and nitric-oxide synthase in the modulation of tracheal motor responsiveness in normal and antigen-sensitized Guinea pigs. J Pharmacol Exp Ther 2006; 319:648-56. [PMID: 16926267 DOI: 10.1124/jpet.106.102475] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The effects of selective cyclooxygenase (COX) isoform (COX-1, COX-2) inhibition, alone or in combination with nitric-oxide synthase (NOS) blockade, on in vitro tracheal muscle responsiveness to histamine were investigated in healthy and ovalbumin (OVA)-sensitized guinea pigs. Immunohistochemistry showed that COX-1 and COX-2 are constitutively present in normal guinea pig trachea, particularly in the epithelial layer, and that COX-2 expression is enhanced in OVA-sensitized animals both in epithelial and subepithelial tissues. In normal guinea pigs, SC-560 [5-(4-chlorophenyl)-1-(4-methoxyphenyl)-3-trifluoromethylpyrazole] (COX-1 inhibitor) or DFU [5,5-dimethyl-3-(3-fluorophenyl)-4-(4-methylsulphonyl)phenyl-2(5H)-furanone] (COX-2 inhibitor) significantly increased the contractile response to histamine, these effects being not additive. NOS inhibition by l-N(G)-nitro-arginine methyl ester (l-NAME) did not affect histamine-induced contraction but reversed the increase caused by COX-1 blockade while not modifying the enhancement associated with COX-2 inhibition. In guinea pigs subjected to OVA sensitization and challenge, COX-2, but not COX-1, inhibition enhanced the motor responses to histamine without any influence by l-NAME. In normal, but not in sensitized animals, the removal of epithelial layer from tracheal preparations abolished the enhancing action of DFU on histamine-mediated contraction. A COX-2-dependent release of prostacyclin (PGI(2)), but not prostaglandin E(2), was observed in tracheal tissues from normal and OVA-sensitized guinea pigs. In conclusion, both COX-1 and COX-2 are constitutive in guinea pig trachea, and COX-2 expression is enhanced by OVA sensitization; in normal animals, epithelial COX-2 exerts a PGI(2)-dependent inhibitory control on tracheal contractility, and this isoform is subjected to upstream regulation by epithelial COX-1 and NOS through a complex interplay; and following antigen sensitization, the inhibitory control on tracheal contractility is maintained by COX-2 induced at subepithelial cell sites.
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Affiliation(s)
- Paola Nieri
- Dipartimento di Psichiatria, Neurobiologia, Farmacologia, e Biotecnologie, via Bonanno no. 6, 56126 Pisa, Italy.
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Choi SH, Langenbach R, Bosetti F. Cyclooxygenase-1 and -2 enzymes differentially regulate the brain upstream NF-kappa B pathway and downstream enzymes involved in prostaglandin biosynthesis. J Neurochem 2006; 98:801-11. [PMID: 16787416 PMCID: PMC1534077 DOI: 10.1111/j.1471-4159.2006.03926.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We have recently reported that cyclooxygenase (COX)-2-deficiency affects brain upstream and downstream enzymes in the arachidonic acid (AA) metabolic pathway to prostaglandin E2 (PGE2), as well as enzyme activity, protein and mRNA levels of the reciprocal isozyme, COX-1. To gain a better insight into the specific roles of COX isoforms and characterize the interactions between upstream and downstream enzymes in brain AA cascade, we examined the expression and activity of COX-2 and phospholipase A2 enzymes (cPLA2 and sPLA2), as well as the expression of terminal prostaglandin E synthases (cPGES, mPGES-1, and - 2) in wild type and COX-1(-/-) mice. We found that brain PGE2 concentration was significantly increased, whereas thromboxane B2 (TXB2) concentration was decreased in COX-1(-/-) mice. There was a compensatory up-regulation of COX-2, accompanied by the activation of the NF-kappaB pathway, and also an increase in the upstream cPLA2 and sPLA2 enzymes. The mechanism of NF-kappaB activation in the COX-1(-/-) mice involved the up-regulation of protein expression of the p50 and p65 subunits of NF-kappaB, as well as the increased protein levels of phosphorylated IkappaBalpha and of phosphorylated IKKalpha/beta. Overall, our data suggest that COX-1 and COX-2 play a distinct role in brain PG biosynthesis, with basal PGE2 production being metabolically coupled with COX-2 and TXB2 production being preferentially linked to COX-1. Additionally, COX-1 deficiency can affect the expression of reciprocal and coupled enzymes, COX-2, Ca2+ -dependent PLA2, and terminal mPGES-2, to overcome defects in brain AA cascade.
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Affiliation(s)
- Sang-Ho Choi
- Brain Physiology and Metabolism Section, National Institute on Aging, National Institutes of Health, Bethesda, Maryland 20892, USA
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Pereira R, Medeiros YS, Fröde TS. Antiinflammatory effects of Tacrolimus in a mouse model of pleurisy. Transpl Immunol 2006; 16:105-11. [PMID: 16860713 DOI: 10.1016/j.trim.2006.04.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2006] [Revised: 04/18/2006] [Accepted: 04/25/2006] [Indexed: 10/24/2022]
Abstract
INTRODUCTION Tacrolimus is an antibiotic macrolide with immunosuppressant properties isolated from Streptomyces tsukubaensis. OBJECTIVES This study evaluated whether the acute and systemic administration of Tacrolimus significantly interfered in leukocyte migration, exudation, myeloperoxidase and adenosine-deaminase and nitric oxide levels, as well as Interleukin-1 (IL-1beta) and tumor necrosis factor alpha (TNFalpha) levels in a mouse model of pleurisy in comparison to those obtained with dexamethasone. MATERIALS AND METHODS Pleurisy was induced by carrageenan (Cg, 1%), bradykinin (BK, 10 nmol), histamine (HIS, 1 micromol) or substance P (PS, 20 nmol) administered by intrapleural route (ipl.) and the inflammatory parameters (cell migration and exudation) were analyzed 4 h after. In the model of pleurisy induced by carrageenan, other markers in the pleural fluid, such as cytokines (TNFalpha and Il-1beta), nitrite/nitrate (NOx), myeloperoxidase (MPO) and adenosine-deaminase (ADA) levels, were also studied. Dexamethaseone (0.5 mg/kg, i.p., 0.5 h before) was also analyzed in all protocols. RESULTS In the pleurisy induced by carrageenan, Tacrolimus (1 mg/kg, i.p.) and dexamethasone (0.5 mg/kg, i.p.) administered 0.5 h before caused a significant decrease in leukocytes, neutrophils and exudation (P < 0.01). Under the same conditions, Tacrolimus and dexamethasone did not modify the blood's white or red cells (P > 0.05). Tacrolimus showed a long lasting antiinflammatory effect, inhibiting leukocytes and neutrophils for up to 24 h (P < 0.01), whereas the inhibition of exudation was less marked (up to 2 h) (P < 0.01). These drugs caused a marked reduction in MPO activity, as well as IL-1beta and TNFalpha levels (P < 0.01), but only Tacrolimus inhibited ADA activity (P < 0.01). On the other hand, dexamethasone, but not Tacrolimus, inhibited NOx levels (P < 0.01). In the same conditions, Tacrolimus significantly inhibited cell migration induced by either bradykinin, histamine or substance P (P < 0.05). In a similar manner, dexamethasone inhibited leukocyte influx induced by bradykinin and histamine (P < 0.05). Regarding exudation effects, dexamethasone markedly inhibited this parameter induced by BK, HIS or SP, whereas Tacrolimus only inhibited exudation caused by HIS (P < 0.05). CONCLUSIONS The results of the present work indicate that Tacrolimus showed important antiinflammatory properties against pleurisy in mice that are different from those caused by dexamethasone. The inhibition of proinflammatory cytokine (TNFalpha, IL-1beta), enzyme (myeloperoxidase, adenosine-deaminase) and mediator (bradykinin, histamine, substance P) release and/or action appears to account for Tacrolimus's actions.
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Affiliation(s)
- Robson Pereira
- Department of Medical Science, Universidade Federal de Santa Catarina, Campus Universitário - Trindade, 88040-970, Florianópolis, SC, Brazil
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Yoshida E, Watanabe T, Takata J, Yamazaki A, Karube Y, Kobayashi S. Topical application of a novel, hydrophilic gamma-tocopherol derivative reduces photo-inflammation in mice skin. J Invest Dermatol 2006; 126:1633-40. [PMID: 16543897 DOI: 10.1038/sj.jid.5700236] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
We previously demonstrated that a novel hydrophilic gamma-tocopherol (gamma-Toc) derivative, gamma-tocopherol-N,N-dimethylglycinate hydrochloride (gamma-TDMG) converts to gamma-Toc in the mouse skin and has a higher bioavailability than gamma-Toc itself. In the present study, we determined whether gamma-TDMG could reduce photo-inflammation in mouse skin, and compared its effectiveness to that of alpha-Toc acetate (alpha-TA). Topical pre- or post-application of 5% gamma-TDMG significantly reduced the formation of edema and tempered the increase in cyclooxygenase-2 (COX-2)-catalyzed synthesis of prostaglandin E2 (PGE2) that were induced by a single dose of UV irradiation of 2 kJ/m2 (290-380 nm, maximum 312 nm). The pre-treatment of mouse skin with 10% alpha-TA had the same anti-inflammatory effect as did gamma-TDMG. In spite of same having the ability to reduce PGE2 levels, the effect of gamma-TDMG pre-treatment on the inhibition of COX-2 mRNA/protein expression was less than that seen with 10% alpha-TA. In contrast, the increase in COX-2 activity seen after UV exposure was reduced more by gamma-TDMG than by alpha-TA, suggesting that the reduction in PGE2 levels might have been due to the direct inhibition of COX-2 activity by gamma-TDMG-derived gamma-Toc. Both Toc derivatives strongly suppressed inducible nitric oxide synthase (iNOS) mRNA expression and nitric oxide (NO) production, both of which play important roles in UV-induced inflammation. Both derivatives also significantly reduced lipid peroxidation in response to UV exposure, though gamma-TDMG's ability in this regard was less than that seen with alpha-TA, which correlated with their abilities to suppress COX-2 expression. Thus, the gamma-TDMG-derived gamma-Toc acts as an antioxidant, suppresses iNOS expression and directly inhibits COX-2 activity, all of which likely play a role in mediating its suppressive effects on photo-inflammation. Our data further suggest that the topical application of gamma-TDMG, a novel hydrophilic gamma-Toc derivative, may be efficacious in preventing and reducing UV-induced inflammation in humans.
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Affiliation(s)
- Emiko Yoshida
- Department of Molecular Physiology, Kyoritsu University of Pharmacy, Tokyo, Japan
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Cella M, Aisemberg J, Sordelli MS, Billi S, Farina M, Franchi AM, Ribeiro ML. Prostaglandins modulate nitric oxide synthase activity early in time in the uterus of estrogenized rat challenged with lipopolysaccharide. Eur J Pharmacol 2006; 534:218-26. [PMID: 16490189 DOI: 10.1016/j.ejphar.2006.01.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2005] [Revised: 01/03/2006] [Accepted: 01/11/2006] [Indexed: 01/22/2023]
Abstract
The aim of our study was to investigate if the lipopolysaccharide (LPS) differentially modulates throughout time the nitric oxide synthase (NOS) and cyclooxygenase (COX) enzymes in the estrogenized rat uterus. To study the effect of LPS throughout time on nitric oxide and prostaglandins production and on NOS and COX expression in the estrogenized rat uterus, females received 5 mg/kg intraperitoneally (i.p.) of LPS and were sacrificed 0.5, 1, 2, 3, 4 and 5 h post-administration. NO production was measured by arginine-citrulline conversion assay and prostaglandin E2/prostaglandin F2alpha by radioconversion. Enzyme expression was evaluated by Western blot analysis. The present work shows that LPS augmented NOS activity 3 h post-treatment and iNOS expression earlier, 2 h post-administration. On the other hand, the administration of LPS stimulated the production of prostaglandin E2/prostaglandin F2alpha and augmented the expression of COX-I 1 h after the treatment and of COX-II 2 h post-treatment. Meloxicam, a COX-II inhibitor, stimulated NO production in a group of rats injected i.p. with both LPS and the inhibitor and sacrificed 2 h after the treatment. These results indicate that, in the estrogenized rat uterus challenged with LPS, the early stimulation in the production of prostaglandins inhibited NOS activity, until the expression of the NOS isoforms is sufficient to overpass the inhibitory effect of the prostaglandins. The above findings suggest that the interaction between NOS and COX might be important in the regulation of physiopathologic events during pregnancy.
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Affiliation(s)
- Maximiliano Cella
- Laboratory of Physiopathology of Pregnancy and Labor, Center for Pharmacological and Botanical Studies, CONICET, School of Medicine, University of Buenos Aires, Paraguay 2155, 16th floor, ZIP code C1121ABG, Buenos Aires, Argentina
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Predescu D, Predescu S, Shimizu J, Miyawaki-Shimizu K, Malik AB. Constitutive eNOS-derived nitric oxide is a determinant of endothelial junctional integrity. Am J Physiol Lung Cell Mol Physiol 2005; 289:L371-81. [PMID: 16093363 DOI: 10.1152/ajplung.00175.2004] [Citation(s) in RCA: 112] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Basal vascular endothelial permeability is normally kept low in part by the restrictiveness of interendothelial junctions (IEJs). We investigated the possible role of nitric oxide (NO) in controlling IEJ integrity and thereby regulating basal vascular permeability. We determined the permeability of continuous endothelia in multiple murine vascular beds, including lung vasculature, of wild-type mice, endothelial nitric oxide synthase (eNOS) null mice, and mice treated with NOS inhibitor N-nitro-L-arginine methyl ester (L-NAME). Light and electron microscopic studies revealed that L-NAME treatment resulted in IEJs opening within a few minutes with a widespread response within 30 min. We observed a 35% increase in transendothelial transport of albumin, using as tracer dinitrophenylated albumin in mouse lungs and other organs studied. To rule out the involvement of blood cells in the mechanism of increased endothelial permeability, vascular beds were flushed free of blood, treated with L-NAME, and perfused with the tracer. The open IEJs observed in these studies indicated a direct role for NO in preserving the normal structure of endothelial junctions. We also used the electron-opaque tracer lanthanum chloride to assess vascular permeability. Lanthanum chloride was presented by perfusion to various vascular beds of mice lacking NO. Open IEJs were seen only in capillary and venular endothelial segments of mice lacking NO, and there was a concomitant increase in vascular permeability to the tracer. Together, these data demonstrate that constitutive eNOS-derived NO is a crucial determinant of IEJ integrity and thus serves to maintain the low basal permeability of continuous endothelia.
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Affiliation(s)
- Dan Predescu
- Department of Pharmacology, University of Illinois, College of Medicine, Chicago, 60612, USA.
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Bae JD, Jung KH, Ahn WS, Bae SH, Jang TJ. Expression of inducible nitric oxide synthase is increased in rat Barrett's esophagus induced by duodenal contents reflux. J Korean Med Sci 2005; 20:56-60. [PMID: 15716603 PMCID: PMC2808576 DOI: 10.3346/jkms.2005.20.1.56] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Barrett's esophagus is a premalignant condition of esophageal adenocarcinoma. Inducible nitric oxide synthase (iNOS) is induced by cytokines and can generate locally high concentrations of nitric oxide (NO), whose metabolites can mediate genotoxicity and influence multistage carcinogenesis by causing DNA damage. Therefore, we evaluated the immunolocalization and expression of iNOS in surgically induced rat Barrett's esophagus. Esophagoduodenal anastomosis was performed in rats for inducing reflux of duodenal contents. Rats were killed at postoperative 10, 20, 30 and 40 weeks. We examined histologic changes and iNOS expression in esophagus by immunohistochemistry and reverse transcription-polymerase chain reaction. Eighty six percent of experimental rats showed Barrett's esophagus above esophagoduodenal junction. iNOS immunoreactivity was clearly observed in the epithelial cells of Barrett's esophagus, predominantly at the apical surface of epithelial cells. Cytoplasmic staining was also seen only in atypical Barrett's esophagus. iNOS mRNA was detected only in the lower esophagus of experimental group. In conclusion, this study suggests that iNOS has some roles on Barrett's esophagus formation.
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Affiliation(s)
- Jong Dae Bae
- Department of Surgery, Dongguk University College of Medicine, Kyoungju, Korea
| | - Ki Hoon Jung
- Department of Surgery, Dongguk University College of Medicine, Kyoungju, Korea
| | - Woo Sup Ahn
- Department of Surgery, Dongguk University College of Medicine, Kyoungju, Korea
| | - Sung Han Bae
- Department of Surgery, Dongguk University College of Medicine, Kyoungju, Korea
| | - Tae Jung Jang
- Department of Pathology, Dongguk University College of Medicine, Kyoungju, Korea
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Marzocco S, Di Paola R, Serraino I, Sorrentino R, Meli R, Mattaceraso G, Cuzzocrea S, Pinto A, Autore G. Effect of methylguanidine in carrageenan-induced acute inflammation in the rats. Eur J Pharmacol 2004; 484:341-50. [PMID: 14744621 DOI: 10.1016/j.ejphar.2003.11.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In vitro and in vivo studies have demonstrated that methylguanidine, an inhibitor of nitric oxide synthase (NOS), is also able to reduce tumour necrosis factor-alpha (TNF-alpha) release. In the present study, we evaluated the anti-inflammatory potential of methylguanidine treatment in two models of acute inflammation (carrageenan-induced paw edema and pleurisy) where oxyradical, nitric oxide (NO) and prostaglandins play a crucial role in the inflammatory processes. Our data show that methylguanidine, given intraperitoneally at the dose of 30 mg/kg, inhibits the inflammatory response reducing significantly (P<0.05) paw swelling, pleural exudates formation, mononuclear cell infiltration and histological injury. Furthermore, our data suggests that there is a significant (P<0.05) reduction in the activity and expression both of the inducible NOS (iNOS) and of cyclooxygenase-2 in lung tissue of pleurisy model. Methylguanidine is also able to reduce the appearance of nitrotyrosine and of the nuclear enzyme poly(adenosine diphosphate [ADP]-ribose) synthase immunoreactivity in the inflamed lung tissues. Treatment with aminoguanidine, the reference drug, significantly reduced all the evaluated pro-inflammatory parameters in carrageenan-treated rats. Taken together, the present results demonstrate that methylguanidine exerts potent anti-inflammatory effects that could be, in part, related to an inhibition of the expression/activity of the iNOS and cyclooxygenase-2 and, another part, may be related to a reduction of TNF-alpha release.
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Affiliation(s)
- Stefania Marzocco
- Department of Pharmaceutical Sciences University of Salerno, Via Ponte Don Melillo 11/c, 84084 Fisciano-Salerno, Italy.
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Monguilhott Dalmarco E, Fröde TS, Medeiros YS. Additional evidence of acute anti-inflammatory effects of cyclosporin A in a murine model of pleurisy. Transpl Immunol 2004; 12:151-7. [PMID: 14967313 DOI: 10.1016/j.trim.2003.09.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2003] [Revised: 09/08/2003] [Accepted: 09/11/2003] [Indexed: 10/26/2022]
Abstract
INTRODUCTION It is well known that cyclosporin A (CsA) exhibits important anti-inflammatory effects, besides its immunosuppressive activity. However, the mechanisms by which CsA exerts these effects remain unclear. OBJECTIVE This study evaluated whether the acute administration of CsA significantly interfered in leukocyte migration, exudation, myeloperoxidase (MPO) and adenosine-deaminase activities and nitrate/nitrite levels, in a mouse model of pleurisy. MATERIALS AND METHODS Pleurisy was induced by carrageenan (1%) treatment and the parameters were analyzed 4 and 48 h after. Groups of animals were previously treated with different doses of CsA and compared with non-treated groups. RESULTS CsA (0.1-5 mg/kg, intraperitoneal, 1 h before pleurisy induction) inhibited neutrophil migration (P<0.05), but not the exudation that occurred 4 h after pleurisy induction. At this time, CsA (1 mg/kg, 1 h before) also decreased nitrate/nitrite levels and MPO activity (P<0.01). CsA (2 mg/kg, 0.5 h before) was also effective in decreasing mononuclear influx, exudation and nitrate/nitrite levels 48 h after onset of inflammation. CONCLUSIONS These results indicate that the acute administration of CsA is able to reduce the two leukocyte populations that occur both at 4 and 48 h after pleurisy induction, late exudation (48 h), MPO activity (4 h) and nitrate/nitrite levels (4 and 48 h). Taken together, these findings indicate that CsA has acute anti-inflammatory effects in immunocompetent animals.
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Affiliation(s)
- Eduardo Monguilhott Dalmarco
- Department of Clinical Analysis, Center of Health Sciences, Universidade Federal de Santa Catarina, Campus Universitário - Trindade, 88040-970 Florianopolis, SC, Brazil
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Timoshenko AV, Lala PK, Chakraborty C. PGE2-mediated upregulation of iNOS in murine breast cancer cells through the activation of EP4 receptors. Int J Cancer 2004; 108:384-9. [PMID: 14648704 DOI: 10.1002/ijc.11575] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We report here that endogenous prostaglandin E(2) (PGE(2)) resulting from cyclooxygenase (COX)-2 expression in a highly metastatic murine breast cancer cell line C3L5 upregulates IFN-gamma + LPS-induced nitric oxide (NO) synthase (iNOS) expression and NO production. This action of PGE(2) is mediated through the EP(4) receptor in a cAMP-dependent manner. Both nonselective and selective COX-2 inhibitors suppressed IFN-gamma + LPS-induced NO production, which was largely restored by exogenous PGE(2) or EP(4) receptor agonist PGE(1) alcohol. EP(4) antagonist AH-23848B inhibited NO production with a concomitant downregulation of iNOS mRNA in IFN-gamma + LPS-stimulated cells. cAMP dependence of NO production by cells under inducible conditions was demonstrated by the use of known modulators of intracellular cAMP. Since both COX-2 and iNOS are implicated in breast cancer progression, our findings of EP(4) receptor-mediated upregulation of iNOS in COX-2-expressing breast cancer cells suggest that blocking COX-2 and/or EP(4) may provide a simple therapeutic modality in this tumor model.
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MESH Headings
- Animals
- Cyclic AMP/pharmacology
- Cyclooxygenase 2
- Cyclooxygenase 2 Inhibitors
- Cyclooxygenase Inhibitors/pharmacology
- Dinoprostone/physiology
- Enzyme Induction
- Enzyme Inhibitors/pharmacology
- Female
- Gene Expression Regulation, Enzymologic
- Humans
- Interferon-gamma/pharmacology
- Isoenzymes/metabolism
- Lipopolysaccharides/pharmacology
- Mammary Neoplasms, Experimental/enzymology
- Mammary Neoplasms, Experimental/pathology
- Membrane Proteins
- Mice
- Mice, Inbred C3H
- Nitric Oxide/metabolism
- Nitric Oxide Synthase/antagonists & inhibitors
- Nitric Oxide Synthase/genetics
- Nitric Oxide Synthase/metabolism
- Nitric Oxide Synthase Type II
- Prostaglandin-Endoperoxide Synthases/metabolism
- Prostaglandins E/metabolism
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Receptors, Prostaglandin E/agonists
- Receptors, Prostaglandin E/antagonists & inhibitors
- Receptors, Prostaglandin E/metabolism
- Receptors, Prostaglandin E, EP4 Subtype
- Tumor Cells, Cultured
- Up-Regulation
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Affiliation(s)
- Alexander V Timoshenko
- Department of Anatomy and Cell Biology, University of Western Ontario, London, Ontario, Canada
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Campos ML, Linares JA, Goldraij A. Influence of interleukin-1alpha and COX-2 over the metabolism of arachidonic acid and glucose in isolated uterus of restricted diet rats. Prostaglandins Leukot Essent Fatty Acids 2004; 70:17-22. [PMID: 14643175 DOI: 10.1016/j.plefa.2003.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Isolated uteri from rats fed with a normal diet convert [14C]arachidonate into eicosanoids: PGE(2), PGF(2alpha), TXB(2) and 6-keto-F(1alpha). Restricted diet (50% of the normal diet, during 25 days) diminishes the levels of PGE(2), PGF(2alpha) and TXB(2). The addition of Interleukin-1alpha to the Krebs-Ringer bicarbonate medium increases sharply the production of eicosanoids. Inhibitors of nitric oxide synthase, Nomega-nitro-L-arginine methyl ester or aminoguanidine, do not prevent eicosanoids increase. Conversely, NS-398 (a selective inhibitor of COX-2) blocks the increase of eicosanoids while PGE(2) blocks eicosanoids production mediated by IL-1alpha. Other experiments with uteri of underfed rats confirm that interleukin-1alpha produces an increase in the glucose metabolism. The addition of Nomega-nitro-L-arginine methyl ester, aminoguadinine or NS-398 blocked such stimulation. It is concluded that Interleukin-1alpha produces an increase of glucose metabolism in uteri isolated from underfed rats by two different mechanisms, both involving COX-2: (1) nitric oxide independent and (2) nitric oxide dependent.
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Affiliation(s)
- M L Campos
- Cátedra de Fisiología, Facultad de Odontología, Universidad Nacional de Córdoba, 5000 Córdoba, Argentina
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Ribeiro M, Cella M, Farina M, Franchi A. Effects of aminoguanidine and cyclooxygenase inhibitors on nitric oxide and prostaglandin production, and nitric oxide synthase and cyclooxygenase expression induced by lipopolysaccharide in the estrogenized rat uterus. Neuroimmunomodulation 2004; 11:191-8. [PMID: 15067210 DOI: 10.1159/000076768] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2003] [Accepted: 07/23/2003] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/OBJECTIVE The aim of our study was first to investigate if there exists an interaction between nitric oxide (NO) and prostaglandin (PG) generation in the estrogenized rat uterus challenged by lipopolysaccharide (LPS), and, secondly, which isoforms of nitric oxide synthase (NOS) and cyclooxygenase (COX) participate in this process. METHODS To study the effect of LPS and to characterize the isoenzymes involved in the process, specific inhibitors of iNOS (aminoguanidine) and COX-II (meloxicam, nimesulide) and non-specific of COX (indomethacin) were injected intraperitoneally to determine their effect on NO and PG production, and on NOS and COX expression induced by LPS in estrogenized rat uterus. NO production was measured by arginine-citrulline conversion assay and PGE(2)/PGF(2alpha,)by radioconversion. Enzyme expression was evaluated by Western blot analysis. RESULTS The present work shows that iNOS inhibitor, aminoguanidine, reduced NO and PGE(2)/PGF(2alpha) production induced by LPS injection. Aminoguanidine exerts its effect over the PG metabolism by inhibiting COX-II activity and expression. On the other hand, both indomethacin, a non-selective PG inhibitor, and meloxicam, a COX-II inhibitor, stimulated NO production and reduced PGE(2)/PGF(2alpha) generation. Indomethacin also reduced COX-II and iNOS expression. CONCLUSION These results indicate that in the estrogenized rat uterus challenged with LPS, PG and NO interact affecting each other's metabolic pathways. The above findings indicate that the interaction between NOS and COX might be important in the regulation of physiopathologic events during pregnancy.
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Affiliation(s)
- María Ribeiro
- Laboratorio de Fisio-patología de la Preñez y el Parto, Centro de Estudios Farmacológicos y Botánicos (CEFYBO, CONICET), Buenos Aires, Argentina.
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Ribeiro ML, Ogando D, Farina M, Franchi A. Epidermal growth factor modulation of prostaglandins and nitrite biosynthesis in rat fetal membranes. Prostaglandins Leukot Essent Fatty Acids 2004; 70:33-40. [PMID: 14643177 DOI: 10.1016/j.plefa.2003.08.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The production of prostaglandins (PGs) and nitric oxide (NO) by amnion tissue may play a significant role in parturition. It is thought that epidermal growth factor (EGF) may be one of the fetal signals that governs the initiation of labor. The aim of the present study was to investigate the effect of EGF in vivo on the PGs and nitrite production of rat fetal membranes. We have evaluated the regulation of PGs and nitrite production in rat fetal membranes ex vivo. The intra-uterine administration of EGF 500 ng in day 21 of pregnancy induced increases in PGE(2) (P<0.001) and PGF(2alpha) (P<0.01) compared to the control fetal membranes from pregnant rats on day 22. Also, this dose of EGF diminished nitrate production significantly (P<0.01). We found that fetal membranes at term (days 18-22 of gestation) expressed EGF-R. The NO donor, nitroprussiate 300 and 600 microM, elicited an inhibitory effect on the PGE(2) and PGF(2alpha) stimulated synthesis. On the other hand, indomethacin 10(-6) and 10(-7)M, a non-selective cyclooxygenase inhibitor, reverted the inhibitory effect exerted by EGF. Hence, rat fetal membranes were found to express epidermal growth factor receptors and, under the effect of EGF, PGs and nitrites production pathways interact probably to prevent a toxic effect caused by an exacerbated synthesis of these mediators.
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Affiliation(s)
- M L Ribeiro
- Laboratorio de Fisio-patología de la preñez y el parto, Centro de Estudios Farmacológicos y Botánicos, Serrano 669, 3rd floor, CP (C1414DEM), Bs As, Argentina.
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Doré S, Otsuka T, Mito T, Sugo N, Hand T, Wu L, Hurn PD, Traystman RJ, Andreasson K. Neuronal overexpression of cyclooxygenase-2 increases cerebral infarction. Ann Neurol 2003; 54:155-62. [PMID: 12891667 DOI: 10.1002/ana.10612] [Citation(s) in RCA: 138] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Increases in COX-2 enzymatic activity and prostaglandin production have been associated with neuronal injury in both acute and age-related degenerative neurological diseases. In this study, we tested the effects of increased COX-2 activity in a model of transient focal ischemia using a transgenic mouse model in which human COX-2 is constitutively expressed selectively in neurons of the striatum, cerebral cortex, and hippocampus. These COX-2 transgenic mice harbor elevated levels of PGE(2) that are 10-fold higher than nontransgenic levels. A significant increase in infarct volume was observed after middle cerebral artery occlusion with 4 days of reperfusion in COX-2 transgenic mice as compared with nontransgenic littermates. Pretreatment of nontransgenic mice with the selective COX-2 inhibitor SC58236 resulted in a significant reduction of infarct volume in nontransgenic mice, consistent with previous pharmacological studies. However, transgenic COX-2 mice treated with SC58236 did not show a significant reduction. This suggests that chronic increases in COX-2 expression and enzymatic activity, which can occur in aging and in pathological states characterized by oxidative stress and chronic inflammatory processes, can lead to downstream cellular changes that have a negative impact on neuronal survival in cerebrovascular disease.
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Affiliation(s)
- Sylvain Doré
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins School of Medicine, Baltimore, MD, USA
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