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Cankar K, Hakkert JC, Sevenier R, Papastolopoulou C, Schipper B, Baixinho JP, Fernández N, Matos MS, Serra AT, Santos CN, Vahabi K, Tissier A, Bundock P, Bosch D. Lactucin Synthase Inactivation Boosts the Accumulation of Anti-inflammatory 8-Deoxylactucin and Its Derivatives in Chicory ( Cichorium intybus L.). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:6061-6072. [PMID: 37036799 PMCID: PMC10119987 DOI: 10.1021/acs.jafc.2c08959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 03/17/2023] [Accepted: 03/27/2023] [Indexed: 06/19/2023]
Abstract
For several sesquiterpene lactones (STLs) found in Asteraceae plants, very interesting biomedical activities have been demonstrated. Chicory roots accumulate the guaianolide STLs 8-deoxylactucin, lactucin, and lactucopicrin predominantly in oxalated forms in the latex. In this work, a supercritical fluid extract fraction of chicory STLs containing 8-deoxylactucin and 11β,13-dihydro-8-deoxylactucin was shown to have anti-inflammatory activity in an inflamed intestinal mucosa model. To increase the accumulation of these two compounds in chicory taproots, the lactucin synthase that takes 8-deoxylactucin as the substrate for the regiospecific hydroxylation to generate lactucin needs to be inactivated. Three candidate cytochrome P450 enzymes of the CYP71 clan were identified in chicory. Their targeted inactivation using the CRISPR/Cas9 approach identified CYP71DD33 to have lactucin synthase activity. The analysis of the terpene profile of the taproots of plants with edits in CYP71DD33 revealed a nearly complete elimination of the endogenous chicory STLs lactucin and lactucopicrin and their corresponding oxalates. Indeed, in the same lines, the interruption of biosynthesis resulted in a strong increase of 8-deoxylactucin and its derivatives. The enzyme activity of CYP71DD33 to convert 8-deoxylactucin to lactucin was additionally demonstrated in vitro using yeast microsome assays. The identified chicory lactucin synthase gene is predominantly expressed in the chicory latex, indicating that the late steps in the STL biosynthesis take place in the latex. This study contributes to further elucidation of the STL pathway in chicory and shows that root chicory can be positioned as a crop from which different health products can be extracted.
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Affiliation(s)
- Katarina Cankar
- Wageningen
Plant Research, Wageningen University &
Research, Droevendaalsesteeg 1, 6708PB Wageningen, The Netherlands
| | - Johanna Christina Hakkert
- Wageningen
Plant Research, Wageningen University &
Research, Droevendaalsesteeg 1, 6708PB Wageningen, The Netherlands
| | - Robert Sevenier
- Keygene
N.V., Agro Business Park
90, 6708PW Wageningen, Netherlands
| | - Christina Papastolopoulou
- Wageningen
Plant Research, Wageningen University &
Research, Droevendaalsesteeg 1, 6708PB Wageningen, The Netherlands
| | - Bert Schipper
- Wageningen
Plant Research, Wageningen University &
Research, Droevendaalsesteeg 1, 6708PB Wageningen, The Netherlands
| | - João P. Baixinho
- Instituto
de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal
- Instituto
de Tecnologia Química e Biológica António Xavier,
Universidade Nova de Lisboa (ITQB NOVA), Av. da República, 2780-157 Oeiras, Portugal
| | - Naiara Fernández
- Instituto
de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal
| | - Melanie S. Matos
- Instituto
de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal
- Instituto
de Tecnologia Química e Biológica António Xavier,
Universidade Nova de Lisboa (ITQB NOVA), Av. da República, 2780-157 Oeiras, Portugal
| | - Ana Teresa Serra
- Instituto
de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal
- Instituto
de Tecnologia Química e Biológica António Xavier,
Universidade Nova de Lisboa (ITQB NOVA), Av. da República, 2780-157 Oeiras, Portugal
| | - Claudia Nunes Santos
- Instituto
de Biologia Experimental e Tecnológica (iBET), Av. República, Qta. Marquês, 2780-157 Oeiras, Portugal
- Instituto
de Tecnologia Química e Biológica António Xavier,
Universidade Nova de Lisboa (ITQB NOVA), Av. da República, 2780-157 Oeiras, Portugal
- iNOVA4Health,
NOVA Medical School Faculdade de Ciências Médicas, NMS|FCM,
Universidade Nova de Lisboa, 1169-056 Lisboa, Portugal
| | - Khabat Vahabi
- Department
of Cell and Metabolic Biology, Leibniz Institute
of Plant Biochemistry, 06120 Halle (Saale), Germany
| | - Alain Tissier
- Department
of Cell and Metabolic Biology, Leibniz Institute
of Plant Biochemistry, 06120 Halle (Saale), Germany
- Martin-Luther-Universität
Halle-Wittenberg, Institut für Pharmazie, Kurt-Mothes-Str. 3, 06120 Halle (Saale), Germany
| | - Paul Bundock
- Keygene
N.V., Agro Business Park
90, 6708PW Wageningen, Netherlands
| | - Dirk Bosch
- Wageningen
Plant Research, Wageningen University &
Research, Droevendaalsesteeg 1, 6708PB Wageningen, The Netherlands
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2
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OUP accepted manuscript. J Pharm Pharmacol 2021; 74:718-729. [DOI: 10.1093/jpp/rgab178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 12/14/2021] [Indexed: 11/13/2022]
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3
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Elias A, Shebaby WN, Nehme B, Faour W, Bassil BS, Hakim JE, Iskandar R, Dib-Jalbout N, Mroueh M, Daher C, Taleb RI. In Vitro and In Vivo Evaluation of the Anticancer and Anti-inflammatory Activities of 2-Himachelen-7-ol isolated from Cedrus Libani. Sci Rep 2019; 9:12855. [PMID: 31492934 PMCID: PMC6731217 DOI: 10.1038/s41598-019-49374-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 08/23/2019] [Indexed: 11/20/2022] Open
Abstract
Cedrus libani is a majestic evergreen tree native to the Mediterranean mountains of Lebanon, Syria and Turkey. In this study, the tree heart wood was extracted using hexane to produce C. libani oil extract (CLOE) as a dark oil. GCMS analysis of CLOE identified up to 30 compounds whereby 2-himachalen-7-ol (7-HC) was the most abundant (40%). 7-HC was isolated using column chromatography and the identity of the white crystalline solid was confirmed via NMR spectroscopy and X-Ray Crystallography. 7-HC demonstrated potent cytotoxic activity against several human cancer cell lines including brain (SF-268, IC50 8.1 μg/mL) and colon (HT-29, IC50 10.1 μg/mL; Caco-2, IC50 9.9 μg/mL) with ovarian (Sk-OV-3, IC50 > 50 μg/mL) cells being the most resistant. However, while HT-29 displayed resistance to Cisplatin, 7-HC was 8–10 folds more potent. Co-treatment with 7-HC and Cisplatin showed a significant synergistic anti-proliferative effect against SF-268, HT-29 and Caco-2 cells. 7-HC also exhibited significant anti-inflammatory effect in formalin-induced paw edema in rats. Western blot analysis revealed that 7-HC displayed dose dependent inhibition of LPS-induced COX-2 protein expression in isolated rat monocytes. The present study demonstrates that 7-HC possesses promising anticancer and anti-inflammatory activities, and may serve as a lead molecule in cancer therapy.
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Affiliation(s)
- Andree Elias
- Department of Natural Sciences, Lebanese American University, Byblos, 1102 2801, Lebanon
| | - Wassim N Shebaby
- Department of Natural Sciences, Lebanese American University, Byblos, 1102 2801, Lebanon
| | - Bilal Nehme
- Department of Natural Sciences, Lebanese American University, Byblos, 1102 2801, Lebanon
| | - Wissam Faour
- School of Medicine, Lebanese American University, Byblos, 1102 2801, Lebanon
| | - Bassem S Bassil
- Faculty of Arts and Sciences, University of Balamand, PO Box 100, Tripoli, Lebanon
| | - Joelle El Hakim
- Department of Natural Sciences, Lebanese American University, Byblos, 1102 2801, Lebanon
| | - Rita Iskandar
- Department of Natural Sciences, Lebanese American University, Byblos, 1102 2801, Lebanon
| | - Nahia Dib-Jalbout
- Department of Natural Sciences, Lebanese American University, Byblos, 1102 2801, Lebanon
| | - Mohamad Mroueh
- School of Pharmacy, Lebanese American University, Byblos, 1102 2801, Lebanon
| | - Costantine Daher
- Department of Natural Sciences, Lebanese American University, Byblos, 1102 2801, Lebanon
| | - Robin I Taleb
- Department of Natural Sciences, Lebanese American University, Byblos, 1102 2801, Lebanon.
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Yeruva T, Lee CH. Regulation of Vaginal Microbiome by Nitric Oxide. Curr Pharm Biotechnol 2019; 20:17-31. [PMID: 30727888 DOI: 10.2174/1389201020666190207092850] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 07/18/2018] [Accepted: 01/30/2019] [Indexed: 12/15/2022]
Abstract
In this review, the composition and regulation of vaginal microbiome that displays an apparent microbial diversity and interacts with other microbiota in the body are presented. The role of nitric oxide (NO) in the regulation of vaginal microflora in which lactobacillus species typically dominate has been delineated from the perspective of maintaining gynecologic ecosystem and prevention of onset of bacteriostatic vaginosis (BV) and/or sexually transmitted diseases (STD) including HIV-1 transmission. The interactions between NO and vaginal microbiome and its influence on the levels of Lactobacillus, hormones and other components are described. The recent progress, such as NO drugs, probiotic Lactobacilli and Lactobacillus microbots, that can be explored to alleviate abnormality of vagina microbiome, is also discussed. An identification of Oral-GI-Vagina axis, as well as the relationship between NO and Lactobacillus regulation in the healthy or pathological status of vagina microbiome, surely offers the advanced drug delivery option against BV or STD including AIDS.
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Affiliation(s)
- Taj Yeruva
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Missouri, Kansas City, MO, 64108, United States
| | - Chi H Lee
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Missouri, Kansas City, MO, 64108, United States
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Luo G, Cheng BCY, Zhao H, Fu XQ, Xie R, Zhang SF, Pan SY, Zhang Y. Schisandra Chinensis Lignans Suppresses the Production of Inflammatory Mediators Regulated by NF-κB, AP-1, and IRF3 in Lipopolysaccharide-Stimulated RAW264.7 Cells. Molecules 2018; 23:molecules23123319. [PMID: 30558163 PMCID: PMC6320760 DOI: 10.3390/molecules23123319] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 12/09/2018] [Accepted: 12/10/2018] [Indexed: 12/04/2022] Open
Abstract
Schisandra Fructus (SF) is a traditional Chinese herb used in the treatment of inflammatory disorders like hepatitis. One of the main anti-inflammatory components of SF is the lignans. However, the underlying anti-inflammatory mechanism of Schisandra Chinensis lignans (SCL) remains unclear. This study aims to investigate the effects of SCL on inflammatory mediators in lipopolysaccharide-stimulated RAW264.7 cells and explore the underlying mechanism. The production of nitric oxide (NO) was determined by Griess reaction. ELISA was used to determine cytokine levels and chemokines secretion. To estimate protein levels and enzyme activities, we employed Western blotting. Nuclear localization of NF-κB, AP-1, and IRF3 was detected using immunofluorescence analyses. The results showed that SCL significantly reduced the release of inflammatory mediators, including NO and PGE2, which may be related to down-regulation of iNOS and COX-2 expression. The production of cytokines and chemokines was suppressed by SCL treatment. SCL also decreased the phosphorylation of IKKα/β, IκB-α, Akt, TBK1, ERK, p38, JNK, NF-κB (p65), AP-1 (c-Jun), and IRF3 in RAW264.7 macrophages activated with LPS. The nuclear protein levels and nuclear translocation of AP-1, NF-κB and IRF3 were suppressed by SCL. These results indicated that SCL suppressed the IKKα/β/NF-κB, MAPKs/AP-1 and TBK1/IRF3 signaling pathways in LPS-stimulated RAW264.7 macrophages.
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Affiliation(s)
- Gan Luo
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China.
| | - Brian Chi-Yan Cheng
- College of Professional and Continuing Education, Hong Kong Polytechnic University, Hong Kong 999077, China.
- Quality Healthcare Medical Services, Hong Kong 999077, China.
| | - Hui Zhao
- School of Traditional Chinese Medicine, Capital Medical University, Beijing 100069, China.
| | - Xiu-Qiong Fu
- Centre for Cancer and Inflammation Research, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong 999077, China.
| | - Ran Xie
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
| | - Shuo-Feng Zhang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China.
| | - Si-Yuan Pan
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China.
| | - Yi Zhang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China.
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Psoriasis and Respiratory Comorbidities: The Added Value of Fraction of Exhaled Nitric Oxide as a New Method to Detect, Evaluate, and Monitor Psoriatic Systemic Involvement and Therapeutic Efficacy. BIOMED RESEARCH INTERNATIONAL 2018; 2018:3140682. [PMID: 30345297 PMCID: PMC6174805 DOI: 10.1155/2018/3140682] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 07/25/2018] [Accepted: 08/12/2018] [Indexed: 02/06/2023]
Abstract
Psoriasis is a chronic inflammatory systemic disease characterized by a wide range of comorbidities. Respiratory comorbidities are currently poorly characterized and with discordant results. The systemic state of inflammation caused by psoriasis acts de novo on respiratory tissues and amplifies preexisting inflammation from asthma or chronic obstructive pulmonary disease. Because the lungs act as a gas exchanger between the internal and external environment, the impact of chronic psoriasis inflammation may be easily assessed through the analysis of exhaled breath. The fraction of exhaled nitric oxide test (FeNO) is a potential noninvasive solution that can provide quantitative and qualitative indices of respiratory airway inflammation. FeNO is routinely used to screen and manage asthmatic patients. Recent pilot studies contain encouraging data that underscore its possible use with systemic inflammatory nonpulmonary diseases, such as psoriasis. FeNO may therefore be a useful tool to evaluate underestimated airway inflammation and at the same time globally evaluate the impact of systemically antipsoriatic therapies.
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7
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NOS1 mediates AP1 nuclear translocation and inflammatory response. Biomed Pharmacother 2018; 102:839-847. [PMID: 29605772 DOI: 10.1016/j.biopha.2018.03.069] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 03/12/2018] [Accepted: 03/12/2018] [Indexed: 01/13/2023] Open
Abstract
A hallmark of the AP1 functioning is its nuclear translocation, which induces proinflammatory cytokine expression and hence the inflammatory response. After endotoxin shock AP1 transcription factor, which comprises Jun, ATF2, and Fos family of proteins, translocates into the nucleus and induces proinflammatory cytokine expression. In the current study, we found, NOS1 inhibition prevents nuclear translocation of the AP1 transcription factor subunits. Pharmacological inhibition of NOS1 impedes translocation of subunits into the nucleus, suppressing the transcription of inflammatory genes causing a diminished inflammatory response. In conclusion, the study shows the novel mechanism of NOS1- mediated AP1 nuclear translocation, which needs to be further explored.
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Inhibition of LPS induced pro-inflammatory responses in RAW 264.7 macrophage cells by PVP-coated naringenin nanoparticle via down regulation of NF-κB/P38MAPK mediated stress signaling. Pharmacol Rep 2017. [DOI: 10.1016/j.pharep.2017.04.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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9
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Cha SM, Cha JD, Jang EJ, Kim GU, Lee KY. Sophoraflavanone G prevents Streptococcus mutans surface antigen I/II-induced production of NO and PGE2 by inhibiting MAPK-mediated pathways in RAW 264.7 macrophages. Arch Oral Biol 2016; 68:97-104. [PMID: 27111520 DOI: 10.1016/j.archoralbio.2016.04.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 03/29/2016] [Accepted: 04/01/2016] [Indexed: 10/22/2022]
Abstract
BACKGROUND Sophora flavescens AITON (Leguminosae) is a typical traditional Korean medical herb considered to exhibit antibacterial, anti-inflammatory, and antipyretic effects, and is also used for the treatment of skin and mucosal ulcers, sores, diarrhea, gastrointestinal hemorrhage, arrhythmia, and eczema. OBJECTIVE AND DESIGN This study examined the inhibitory effects of sophoraflavanone G (SF) of S. flavescens on the bacterial fibrillar protein, Antigen I/II (AgI/II)-N recombinant protein isolated from Streptococcus mutans(rAg I/II)-induced production of nitric oxide (NO) and prostaglandin E2 (PGE2). The investigation was focused on whether SF could inhibit the production of proinflammatory mediators such as nitric oxide (NO) and prostaglandin (PG) E2 as well as the expression of inducible nitric oxide synthase (iNOS), cyclooxygenase (COX)-2, tumor necrosis factor (TNF)-a, interleukin (IL)-6, nuclear factor (NF)-κB and mitogen-activated protein kinases (MAPKs) in rAgI/II-stimulated RAW 264.7 cells using Griess reagent, Enzyme linked immunosorbent assay (ELISA), and Western blotting analysis. RESULTS SG significantly inhibited the production of NO and PGE2 and pro-inflammatory cytokines, such as interleukin (IL)-1β, IL-6, and tumor necrosis factor α in Ag I/II-N-stimulated RAW264.7 cells, which were mediated by the down-regulation of inducible NO synthase (iNOS) and cyclooxygenase-2 (COX-2) expression. The SF inhibited the phosphorylation of IκB-α, nuclear translocation of p65, and subsequent activation of NF- κB in the rAgI/II-stimulated cells. In addition, the SF suppressed the rAgI/II-stimulated activation of ERK MAPK as well as the MAPK inhibitor significantly reduced the rAgI/II-induced production of NO and PGE2. CONCLUSION Collectively, we suggest that the SF inhibits the expression and production of inflammatory mediators by blocking the ERK MAPK mediated pathway and inhibiting the activation of NF-κB.
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Affiliation(s)
- Su-Mi Cha
- Department of Oral Microbiology and Institute of Oral Bioscience, Chonbuk National University, Jeonju 561-756, South Korea
| | - Jeong-Dan Cha
- Department of Efficacy Research, Institute of Jinan red ginseng, Jinan 567-801, South Korea
| | - Eun-Jin Jang
- Department of Dental Technology, Daegu Health College, Daegu, South Korea
| | - Gi-Ug Kim
- Department of Dental Hygiene, Pohang College, Pohang, South Korea
| | - Kyung-Yeol Lee
- Department of Oral Microbiology and Institute of Oral Bioscience, Chonbuk National University, Jeonju 561-756, South Korea.
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Xu H, Feng Y, Chen G, Zhu X, Pang W, Du Y, Wang Q, Qi Z, Cao Y. L-arginine exacerbates experimental cerebral malaria by enhancing pro-inflammatory responses. TOHOKU J EXP MED 2015; 236:21-31. [PMID: 25925198 DOI: 10.1620/tjem.236.21] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
L-Arginine (L-Arg), the substrate for nitric oxide (NO) synthase, has been used to treat malaria to reverse endothelial dysfunction in adults. However, the safety and efficacy of L-Arg remains unknown in malaria patients under the age of five, who are at the greatest risk of developing cerebral malaria (CM), a severe malaria complication. Here, we tested effects of L-Arg treatment on the outcomes of CM using a mouse model. Experimental cerebral malaria (ECM) was induced in female C57BL/6 mice infected with Plasmodium berghei ANKA, and L-Arg was administrated either prophylactically or after parasite infection. Surprisingly, both types of L-Arg administration caused a decline in survival time and raised CM clinical scores. L-Arg treatment increased the population of CD4(+)T-bet(+)IFN-γ(+) Th1 cells and the activated macrophages (F4/80(+)CD36(+)) in the spleen. The levels of pro-inflammatory cytokines, IFN-γ and TNF-α, in splenocyte cultures were also increased by L-Arg treatment. The above changes were accompanied with a rise in the number of dendritic cells (DCs) and an increase in their maturation. However, L-Arg did not affect the population of regulatory T cells or the level of IL-10 in the spleen. Taken together, these data suggest that L-Arg may enhance the Th1 immune response, which is essential for a protective response in uncomplicated malaria but could be lethal in CM patients. Therefore, the prophylactic use of L-Arg to treat CM, based on the assumption that restoring the bioavailability of endothelial NO improves the outcome of CM, may need to be reconsidered especially for children.
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Affiliation(s)
- Hongbin Xu
- Department of Immunology, College of Basic Medical Sciences, China Medical University
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Anti-inflammatory potential of newly synthesized 4-[(butylsulfinyl)methyl]-1,2-benzenediol in lipopolysaccharide-stimulated BV2 microglia. Molecules 2014; 19:16609-23. [PMID: 25322283 PMCID: PMC6270807 DOI: 10.3390/molecules191016609] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 10/04/2014] [Accepted: 10/08/2014] [Indexed: 01/08/2023] Open
Abstract
In this study, we investigated the anti-inflammatory effects of newly synthesized 4-[(butylsulfinyl)methyl]-1,2-benzenediol (SMBD) in lipopolysaccharide (LPS)-stimulated BV2 microglia and the subsequent signaling events. Following stimulation with LPS, elevated production of nitric oxide (NO) and prostaglandin E2 (PGE2) was detected in BV2 cells; however, SMBD pretreatment inhibited the production of NO and PGE2 through suppressing gene expression of inducible NO synthase (iNOS) and cyclooxygenase-2 (COX-2), respectively, at non-toxic concentrations. LPS-stimulated gene expression and production of interleukin (IL)-1β and tumor necrosis factor (TNF)-α were also significantly reduced by SMBD. The anti-inflammatory effects of SMBD were associated with suppression of LPS-induced nuclear translocation of nuclear factor-kappa B (NF-κB), and phosphorylation of mitogen-activated protein kinases (MAPKs) and Akt, a phosphatidylinositol 3-kinase (PI3K) downstream effector. Therefore, the present results demonstrate that SMBD down-regulates inflammatory gene expression by inhibiting the activation of NF-κB through interference with the activation of MAPKs and PI3K/Akt signaling. Taken together, our data suggest that SMBD may have potential to be developed into an effective anti-inflammatory agent.
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Anti-inflammatory effect of procyanidins from wild grape (Vitis amurensis) seeds in LPS-induced RAW 264.7 cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:409321. [PMID: 24260615 PMCID: PMC3821960 DOI: 10.1155/2013/409321] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Revised: 08/16/2013] [Accepted: 09/10/2013] [Indexed: 11/17/2022]
Abstract
In the present study, the anti-inflammatory effect and underlying mechanisms of wild grape seeds procyanidins (WGP) were examined using lipopolysaccharide- (LPS-) stimulated RAW 264.7 cells. We used nitric oxide (NO) and prostaglandin E2 (PGE2) and reactive oxygen species (ROS) assays to examine inhibitory effect of WGP and further investigated the mechanisms of WGP suppressed LPS-mediated genes and upstream expression by Western blot and confocal microscopy analysis. Our data indicate that WGP significantly reduced NO, PGE2, and ROS production and also inhibited the expression of proinflammatory mediators such as inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) protein expressions. Consistently, WGP significantly reduced LPS-stimulated expression of proinflammatory cytokines such as tumor necrosis factor α (TNF-α) and interleukin- (IL-) 1β. Moreover, WGP prevented nuclear translocation of nuclear factor-κB (NFκB) p65 subunit by reducing inhibitory κB-α (IκBα) and NFκB phosphorylation. Furthermore, we found that WGP inhibited LPS-induced phosphorylation of p38 mitogen-activated protein kinase (MAPK). Taken together, our results demonstrated that WGP exerts potent anti-inflammatory activity through the inhibition of iNOS and COX-2 by regulating NFκB and p38 MAPK pathway.
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Ahmad R, Yadav N, Chaudhary K, Heming T, Ahsan H. Analysis of human DNA-arginine photoadduct modified with peroxynitrite. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2012; 31:377-87. [PMID: 22444198 DOI: 10.1080/15257770.2012.662610] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The aim of the study is the biochemical characterization of human DNA modified with arginine and peroxynitrite. In the present study, DNA was isolated from human blood cells and its adduct was formed with one of the amino acid, arginine. The DNA-arginine adduct was then modified with peroxynitrite, a reactive nitrogen species. The modified DNA adduct was characterized by ultraviolet (UV) absorption spectroscopy, thermal melting profile, and electrophoresis studies. UV spectroscopic analysis of the photoadduct showed hyperchromicity, indicating the formation of single-strand breaks and photomodification. Thermal denaturation studies of DNA-arginine adduct and peroxynitrite-modified adduct showed a decrease in the temperature (T(m)) value by 4.5°C and an increase in the T(m) of 8°C, respectively. Peroxynitrite modification is evident by an increase in the T(m) value and a change in the migration pattern of native and modified photoadducts on agarose gel electrophoresis. The DNA-arginine and peroxynitrite-modified photoadducts could have important implications in various pathophysiological and immunopathological conditions.
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Affiliation(s)
- Rizwan Ahmad
- Department of Biochemistry and Physiology, Oman Medical College, Sohar, Sultanate of Oman
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Cha JD, Moon SE, Kim HY, Lee JC, Lee KY. The Essential Oil Isolated fromArtemisia capillarisPrevents LPS-Induced Production of NO and PGE2by Inhibiting MAPK-Mediated Pathways in RAW 264.7 Macrophages. Immunol Invest 2009; 38:483-97. [DOI: 10.1080/08820130902936307] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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15
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Le Brocq M, Leslie SJ, Milliken P, Megson IL. Endothelial dysfunction: from molecular mechanisms to measurement, clinical implications, and therapeutic opportunities. Antioxid Redox Signal 2008; 10:1631-74. [PMID: 18598143 DOI: 10.1089/ars.2007.2013] [Citation(s) in RCA: 131] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Endothelial dysfunction has been implicated as a key factor in the development of a wide range of cardiovascular diseases, but its definition and mechanisms vary greatly between different disease processes. This review combines evidence from cell-culture experiments, in vitro and in vivo animal models, and clinical studies to identify the variety of mechanisms involved in endothelial dysfunction in its broadest sense. Several prominent disease states, including hypertension, heart failure, and atherosclerosis, are used to illustrate the different manifestations of endothelial dysfunction and to establish its clinical implications in the context of the range of mechanisms involved in its development. The size of the literature relating to this subject precludes a comprehensive survey; this review aims to cover the key elements of endothelial dysfunction in cardiovascular disease and to highlight the importance of the process across many different conditions.
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Affiliation(s)
- Michelle Le Brocq
- Health Faculty, UHI Millennium Institute, Inverness, University of Edinburgh, Edinburgh, Scotland
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Zhu X, Smith MA, Honda K, Aliev G, Moreira PI, Nunomura A, Casadesus G, Harris PL, Siedlak SL, Perry G. Vascular oxidative stress in Alzheimer disease. J Neurol Sci 2007; 257:240-6. [PMID: 17337008 PMCID: PMC1952687 DOI: 10.1016/j.jns.2007.01.039] [Citation(s) in RCA: 131] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Alzheimer disease and cerebrovascular dementia are two common causes of dementia and, by present diagnostic criteria, are mutually exclusive using vascular pathology as an arbitrary demarcation in differential diagnosis. However, evidence from epidemiological, neuropathological, clinical, pharmacological, and functional studies suggest considerable overlap in risk factors and pathological changes suggesting shared common pathogenic mechanisms between these two diseases such that vascular factors play a vital role in the pathogenesis of Alzheimer disease. A high energy demand and lack of an endogenous fuel reserve make the brain highly dependent upon a continuous blood supply where disruption of cerebral blood vessels and blood flow can have serious consequences on neural activities. Indeed, many studies implicate metabolic defects in Alzheimer disease, such a reduced brain metabolism is one of the best documented abnormalities in the disease. Notably, since endothelial reactive oxygen species such as nitric oxide act as vasodilators at low concentrations, increased production coupled with elevated reactive oxygen species scavenging of nitric oxide, can lead to reduced bioavailability of nitric oxide and increased oxidative stress that damage sensitive vascular cells. In this respect, we and others have demonstrated that oxidative stress is one of the earliest pathological changes in the brain of Alzheimer disease patients and plays a critical role in the vascular abnormalities underlying metabolic defects in Alzheimer disease. Here, we discuss vascular factors in relation to Alzheimer disease and review hypoperfusion as a potential cause by triggering mitochondrial dysfunction and increased oxidative stress initiating the pathogenic process.
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Affiliation(s)
- Xiongwei Zhu
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | - Mark A. Smith
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | - Kazuhiro Honda
- Department of Internal Medicine, Shinmatsudo Central General Hospital, Chiba 270-0034, Japan
| | - Gjumrakch Aliev
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | - Paula I. Moreira
- Center for Neuroscience and Cell Biology of Coimbra, University of Coimbra, 3004-517 Coimbra, Portugal
| | - Akihiko Nunomura
- Department of Psychiatry and Neurology, Asahikawa Medical College, Asahikawa 078-8510, Japan
| | - Gemma Casadesus
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | - Peggy L.R. Harris
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | - Sandra L. Siedlak
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | - George Perry
- Department of Pathology, Case Western Reserve University, Cleveland, Ohio 44106, USA
- College of Sciences, University of Texas at San Antonio, San Antonio, Texas 78249-0661, USA
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Burnett AL, Musicki B, Jin L, Bivalacqua TJ. Nitric oxide/redox-based signalling as a therapeutic target for penile disorders. Expert Opin Ther Targets 2006; 10:445-57. [PMID: 16706684 DOI: 10.1517/14728222.10.3.445] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Oxidative and/or nitrosative stress is implicated in the pathogeneses of assorted penile disorders of clinical significance, notably erectile dysfunction, priapism and penile fibrosis. It is becoming increasingly recognised that the generation and activity of reactive oxygen and nitrogen species in the penis influence vascular homeostasis of this organ, with adverse effects exerted at cellular and molecular levels. Furthermore, these elements may interact with molecular signalling pathways operating in the penis, modulating their functional roles. This interaction in particular suggests that by accessing molecular targets associated with oxidative/nitrosative stress in the penis, new pharmacotherapeutic approaches may be developed to promote normal erectile ability and preserve erectile tissue health. This notion pertains to, but also extends beyond, interventions which predictably target components of the nitric oxide-based signal transduction pathway for the on-demand treatment of erectile dysfunction. The next line of pharmaceuticals for disorders of the penis, in general, may well spawn from an integrative understanding of the complex regulatory interactions influenced by, as well as influencing nitric oxide signalling in this organ.
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Affiliation(s)
- Arthur L Burnett
- Department of Urology, The James Buchanan Brady Urological Institute, The Johns Hopkins University School of Medicine, Baltimore, MD 21287-2411, USA.
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Prosperi C, Scali C, Pepeu G, Casamenti F. NO-flurbiprofen attenuates excitotoxin-induced brain inflammation, and releases nitric oxide in the brain. JAPANESE JOURNAL OF PHARMACOLOGY 2001; 86:230-5. [PMID: 11459126 DOI: 10.1254/jjp.86.230] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Brain inflammation underlies the pathogenesis of Alzheimer's disease (AD) and nonsteroidal anti-inflammatory drug therapy may delay the onset of AD. We investigated, in vivo, the effects of NO-flurbiprofen on brain inflammation in rats injected with quisqualic acid into the nucleus basalis and on the release of nitric oxide from the drug in naive rat brains. We showed that the excitotoxin-induced microglia reaction, the expression of inducible nitric oxide synthase-positive cells and the production of interleukin-1beta and prostaglandin-E2 in the injected area were attenuated by the NO-flurbiprofen (15 mg/kg, p.o.) treatment. An oral administration of NO-flurbiprofen (25, 50 and 100 mg/kg) to naive rats was followed by significant increases in cortical nitrite levels. This drug may have important therapeutic implications for the treatment of AD.
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Affiliation(s)
- C Prosperi
- Department of Pharmacology, University of Florence, Italy
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Young RJ, Beams RM, Carter K, Clark HA, Coe DM, Chambers CL, Davies PI, Dawson J, Drysdale MJ, Franzman KW, French C, Hodgson ST, Hodson HF, Kleanthous S, Rider P, Sanders D, Sawyer DA, Scott KJ, Shearer BG, Stocker R, Smith S, Tackley MC, Knowles RG. Inhibition of inducible nitric oxide synthase by acetamidine derivatives of hetero-substituted lysine and homolysine. Bioorg Med Chem Lett 2000; 10:597-600. [PMID: 10741561 DOI: 10.1016/s0960-894x(00)00055-x] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The synthesis and in vitro evaluation of the acetamidine derivatives of hetero-substituted lysine and homolysine analogues have identified potent inhibitors of human nitric oxide synthase enzymes, including examples with marked selectivity for the inducible isoform.
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Affiliation(s)
- R J Young
- Glaxo Wellcome Research and Development, Stevenage, Hertfordshire, UK.
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