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Schulz M, Gonzaga LV, Antunes ACN, Lubschinski T, Mohr ETB, Dalmarco EM, Deolindo CTP, Hoff RB, Zambonim FM, Costa ACO, Fett R. The Protective Effect of Juçara Fruit (Euterpe edulis Martius) Extracts on LPS-Activated J774 Macrophages. PLANT FOODS FOR HUMAN NUTRITION (DORDRECHT, NETHERLANDS) 2024:10.1007/s11130-024-01204-8. [PMID: 38976202 DOI: 10.1007/s11130-024-01204-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/11/2024] [Indexed: 07/09/2024]
Abstract
This study investigated the anti-inflammatory effect of hydrophilic and lipophilic extracts from juçara fruits (Euterpe edulis Martius) through measurement of nitric oxide (NOx) and cytokines (IL-12p70, TNF-α, INF-γ, MCP-1, IL-6, and IL-10). J774 macrophages were stimulated with lipopolysaccharides (1 µg/mL) and treated with various concentrations (1-100 µg/mL) of juçara fruits extracts from crude extracts, and hexane, dichloromethane, ethyl acetate, and butanol fractions. Potential relationships between the phenolic composition of the extracts determined by LC-ESI-MS/MS and their anti-inflammatory capacity were also evaluated. Hexane and dichloromethane fractions inhibited NOx and IL-12p70 while increased IL-10. Hexane fractions also decreased IL-6 and IFN-γ production. Hexane and dichloromethane fractions showed a higher number of phenolic compounds (32 and 34, respectively) than the other extracts tested and were also the only ones that presented benzoic acid and pinocembrin. These results suggest juçara fruits compounds as potential anti-inflammatory agents, especially those of a more apolar nature.
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Affiliation(s)
- Mayara Schulz
- Department of Food Science and Technology, Federal University of Santa Catarina, Admar Gonzaga 1346, Itacorubi, Florianopolis, SC, 88034-001, Brazil.
| | - Luciano Valdemiro Gonzaga
- Department of Food Science and Technology, Federal University of Santa Catarina, Admar Gonzaga 1346, Itacorubi, Florianopolis, SC, 88034-001, Brazil
| | - Ana Clara Nascimento Antunes
- Department of Food Science and Technology, Federal University of Santa Catarina, Admar Gonzaga 1346, Itacorubi, Florianopolis, SC, 88034-001, Brazil
| | - Tainá Lubschinski
- Department of Clinical Analysis, Federal University of Santa Catarina, Florianópolis, SC, 88040-900, Brazil
| | | | | | - Carolina Turnes Pasini Deolindo
- Federal Agricultural Defense Laboratory, Brazilian Ministry of Agriculture, Livestock and Food Supply, São José, SC, 91780-580, Brazil
| | - Rodrigo Barcellos Hoff
- Federal Agricultural Defense Laboratory, Brazilian Ministry of Agriculture, Livestock and Food Supply, São José, SC, 91780-580, Brazil
| | - Fábio Martinho Zambonim
- Agricultural Research and Rural Extension Company of Santa Catarina (Epagri)/ Environmental Resources and Hydrometeorology Information Center (Ciram), Florianópolis, SC, 88034-901, Brazil
| | - Ana Carolina Oliveira Costa
- Department of Food Science and Technology, Federal University of Santa Catarina, Admar Gonzaga 1346, Itacorubi, Florianopolis, SC, 88034-001, Brazil
| | - Roseane Fett
- Department of Food Science and Technology, Federal University of Santa Catarina, Admar Gonzaga 1346, Itacorubi, Florianopolis, SC, 88034-001, Brazil.
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Nyssen P, Maho A, Malempre R, Matagne A, Mouithys-Mickalad A, Hoebeke M. Propofol inhibits the myeloperoxidase activity by acting as substrate through a redox process. Biochim Biophys Acta Gen Subj 2022; 1866:130100. [PMID: 35150774 DOI: 10.1016/j.bbagen.2022.130100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 02/01/2022] [Accepted: 02/01/2022] [Indexed: 01/13/2023]
Abstract
BACKGROUND Propofol (2,6-diisopropylphenol) is frequently used as intravenous anesthetic agent, especially in its injectable form (Diprivan), to initiate and maintain sedative state during surgery or in intensive care units. Numerous studies have reported the antioxidant and anti-inflammatory effect of propofol. The oxidant enzyme myeloperoxidase (MPO), released from activated neutrophils, plays a key role in host defense. An increase of the circulating MPO concentration has been observed in patients admitted in intensive care unit and presenting a systemic inflammatory response related to septic shock or trauma. METHODS This study investigates the immunomodulatory action of propofol and Diprivan as inhibitor of the oxidant activity of MPO. The understanding of the redox action mechanism of propofol and Diprivan on the myeloperoxidase chlorination and peroxidase activities has been refined using the combination of fluorescence and absorption spectroscopies with docking and cyclic voltammetry. RESULTS Propofol acts as a reversible MPO inhibitor. The molecule interacts as a reducing substrate in the peroxidase cycle and promotes the accumulation of compound II. At acidic pH (5.5), propofol and Diprivan do not inhibit the chlorination activity, but their action increases at physiological pH (7.4). The main inhibitory action of Diprivan could be attributed to its HOCl scavenging property. GENERAL SIGNIFICANCE Propofol can act as a reversible MPO inhibitor at clinical concentrations. This property could, in addition to other previously proven anti-inflammatory actions, induce an immunomodulatory action, beneficial during clinical use, particularly in the treatment of systemic inflammation response syndrome.
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Affiliation(s)
- P Nyssen
- Biomedical Spectroscopy Laboratory, Department of Physics, CESAM, University of Liège, Building B5a, Quartier Agora, Allée du 6 Août, 19, Sart-Tilman, 4000 Liège, Belgium.
| | - A Maho
- Greenmat, Department of Chemistry, CESAM, University of Liège, Building B6c, Quartier Agora, Allée du 6 Août, 19, Sart-Tilman, 4000 Liège, Belgium
| | - R Malempre
- Laboratory of Enzymology and Protein folding, Centre for Protein Engineering, InBioS, University of Liège, Building B6a, Quartier Agora, Allée du 6 Août, 19, Sart-Tilman, 4000 Liège, Belgium
| | - A Matagne
- Laboratory of Enzymology and Protein folding, Centre for Protein Engineering, InBioS, University of Liège, Building B6a, Quartier Agora, Allée du 6 Août, 19, Sart-Tilman, 4000 Liège, Belgium
| | - A Mouithys-Mickalad
- CORD, Department of Chemistry, CIRM, University of Liège, Building B6a, Quartier Agora, Allée du 6 Août, 13, Sart-Tilman, 4000 Liège, Belgium
| | - M Hoebeke
- Biomedical Spectroscopy Laboratory, Department of Physics, CESAM, University of Liège, Building B5a, Quartier Agora, Allée du 6 Août, 19, Sart-Tilman, 4000 Liège, Belgium
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Yang P, Ji Y, Lu J. Transformation of ammonium to nitrophenolic byproducts by sulfate radical oxidation. WATER RESEARCH 2021; 202:117432. [PMID: 34303167 DOI: 10.1016/j.watres.2021.117432] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 07/07/2021] [Accepted: 07/08/2021] [Indexed: 06/13/2023]
Abstract
Sulfate radical (SO4•-) based oxidation shows great promise in wastewater treatment and subsurface remediation. For the first time, we demonstrated that SO4•- could induce the transformation of ammonium (NH4+) to nitrophenolic byproducts. Using high-resolution mass spectrometry in combination with 15N labeling, mono-nitro and di-nitro phenolic byproducts were identified in a sample containing 1 mM NH4+ and 10 mg/L natural organic matter (NOM) following heat activated peroxydisulfate (PDS) oxidation. At PDS dose of 1 mM, the formation of p-nitrophenol and 5-nitrosalicylic acid reached 0.21 and 0.30 μM, respectively, in 12 h and then decreased; the formation of 2,4-dinitrophenol and 3,5-dinitrosalicylic acid increased monotonically, reaching 0.37 and 0.62 μM, respectively, in 24 h. One-electron oxidation of NH4+ to form aminyl radicals (•NH2) was the first step of the transformation. The reaction of •NH2 with oxygen was a key step in propagating radical chain reactions, leading to nitrogen dioxide radicals (NO2•) as a key nitrating agent. The reactive sites susceptible to nitrating in NOM molecules are not limited to phenolic moieties. We found that aromatic carboxylate moieties could be in situ transformed to phenolics by SO4•-, thus contributed to nitrophenolic byproducts formation as well. Considering the ubiquitous presence of NH4+ in the environment, formation of nitrophenolic byproducts will be widespread when SO4•- is applied for onsite remediation, which should be taken into consideration when evaluating the feasibility of this technology.
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Affiliation(s)
- Peizeng Yang
- Department of Environmental Science and Engineering, Nanjing Agricultural University, Nanjing 210095, China
| | - Yuefei Ji
- Department of Environmental Science and Engineering, Nanjing Agricultural University, Nanjing 210095, China
| | - Junhe Lu
- Department of Environmental Science and Engineering, Nanjing Agricultural University, Nanjing 210095, China.
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Mouithys-Mickalad A, Storms N, Franck T, Ceusters J, de la Rebière de Pouyade G, Deby-Dupont G, Serteyn D. Effects of Juglone on Neutrophil Degranulation and Myeloperoxidase Activity Related to Equine Laminitis. Front Vet Sci 2021; 8:677675. [PMID: 34336974 PMCID: PMC8322847 DOI: 10.3389/fvets.2021.677675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 06/08/2021] [Indexed: 11/13/2022] Open
Abstract
Experimental laminitis, characterized by a failure of the dermal-epidermal interface of the foot, can be induced in horses by the oral administration of a black walnut extract (BWE). In the early phase of this severe and painful disease, an activation of neutrophil occurs, with the release of myeloperoxidase (MPO), a pro-oxidant enzyme of neutrophils, in plasma, skin, and laminar tissue. Juglone, a naphthoquinone derivative endowed with redox properties, is found in walnuts and has been incriminated in this neutrophil activation. We report for the first time the inhibitory activity of juglone on the degranulation of neutrophils induced by cytochalasin B and formyl-methionyl-leucyl-phenylalanine as monitored by the MPO release (>90% inhibition for 25 and 50 μM). Moreover, it also acts on the peroxidase activity of MPO by interacting with the intermediate "π cation radical," as evidenced by the classical and specific immunological extraction followed by enzymatic detection (SIEFED) assays. These results are confirmed by a docking study showing the perfect positioning of juglone in the MPO enzyme active site and its interaction with one of the amino acids (Arg-239) of MPO apoprotein. By chemiluminescence and electron paramagnetic resonance techniques, we demonstrated that juglone inhibited reactive oxygen species (ROS) and superoxide anion free radical produced from phorbol myristate acetate (PMA)-activated polymorphonuclear neutrophils (PMNs). These results indicate that juglone is not the trigger for equine laminitis, at least if we focus on the modulation of neutrophil activation.
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Affiliation(s)
| | - Nazaré Storms
- Department of Clinical Sciences, Equine Surgery, University of Liège, Liège, Belgium
| | - Thierry Franck
- Centre for Oxygen R&D, Institute of Chemistry, B6a, University of Liège, Liège, Belgium
| | - Justine Ceusters
- Centre for Oxygen R&D, Institute of Chemistry, B6a, University of Liège, Liège, Belgium
| | | | - Ginette Deby-Dupont
- Centre for Oxygen R&D, Institute of Chemistry, B6a, University of Liège, Liège, Belgium
| | - Didier Serteyn
- Centre for Oxygen R&D, Institute of Chemistry, B6a, University of Liège, Liège, Belgium.,Department of Clinical Sciences, Equine Surgery, University of Liège, Liège, Belgium
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Etsè KS, Etsè KD, Nyssen P, Mouithys-Mickalad A. Assessment of anti-inflammatory-like, antioxidant activities and molecular docking of three alkynyl-substituted 3-ylidene-dihydrobenzo[d]isothiazole 1,1-dioxide derivatives. Chem Biol Interact 2021; 344:109513. [PMID: 33974901 DOI: 10.1016/j.cbi.2021.109513] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 04/12/2021] [Accepted: 05/05/2021] [Indexed: 11/19/2022]
Abstract
The presence of enyne and benzoisothiazole functions in the molecular architecture of compounds 1, 2 and 3 were expected to provide biochemical activities. In the present work, we first examined the molecular surface contact of three alkynyl-substituted 3-ylidenedihydrobenzo[d] isothiazole 1,1-dioxides. The analysis of the Hirshfeld surfaces reveals that only compound 3 exhibited a well-defined red spots, indicating intermolecular interactions identified as S-O⋯H, C-H⋯O and C-O⋯H contacts. Comparative fingerprint histograms of the three compounds show that close pair interactions are dominated by C-H⋯H-C contact. By UV-visible analysis, compound 1 showed the most intense absorbances at 407 and 441 nm, respectively. The radical scavenging activity explored in the DPPH test, shows that only 1 exhibited low anti-radical activity. Furthermore, cellular antioxidant capacity of benzoisothiazoles 1-3 was investigated with PMA-activated HL-60 cells using chemiluminescence and fluorescence techniques in the presence of L-012 and Amplex Red probe, respectively. Results highlight that compound 1 exhibited moderate anti-ROS capacity while compounds 2 and 3 enhanced ROS production. The cytotoxicity test performed on HL-60 cells, using the MTS assay, confirmed the lack of toxicity of the tested benzoisothiazole 1 compared to 2 and 3 which show low cytotoxicity (≤30%). Anti-catalytic activity was evaluated by following the inhibitory potential of the benzoisothiazoles on MPO activity and depicted benzoisothiazoles-MPO interactions by docking. Both SIEFED and docking studies demonstrated an anti-catalytic activity of the tested benzoisothiazoles towards MPO with the best activity for compound 2.
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Affiliation(s)
- Koffi Sénam Etsè
- Laboratory of Medicinal Chemistry, Center for Interdisciplinary Research on Medicines (CIRM), University of Liège, Quartier Ho^pital B36 Av. Hippocrate 15 B-4000 Liège, Belgium
| | - Kodjo Djidjolé Etsè
- Laboratoire de Physiologie et Biotechnologie Végétales (LPBV), Faculté des Sciences (FDS), Université de Lomé (UL), Lomé, Togo
| | - Pauline Nyssen
- Biomedical Spectroscopy Laboratory, Department of Physics, CESAM, ULiège, Sart-Tilman, B-4000 Liège, Belgium
| | - Ange Mouithys-Mickalad
- Center for Oxygen, Research and Development (CORD) and Center for Interdisciplinary Research on Medicine (CIRM) Institute of Chemistry University of Liège, Sart-Tilman (B.6a), 4000 Liège, Belgium.
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Erady V, Mascarenhas RJ, Satpati AK, Bhakta AK, Mekhalif Z, Delhalle J, A D. Carbon paste modified with Bi decorated multi-walled carbon nanotubes and CTAB as a sensitive voltammetric sensor for the detection of Caffeic acid. Microchem J 2019. [DOI: 10.1016/j.microc.2018.12.023] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Nyssen P, Mouithys-Mickalad A, Minguet G, Sauvage E, Wouters J, Franck T, Hoebeke M. Morphine, a potential inhibitor of myeloperoxidase activity. Biochim Biophys Acta Gen Subj 2018; 1862:2236-2244. [DOI: 10.1016/j.bbagen.2018.07.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 07/05/2018] [Accepted: 07/09/2018] [Indexed: 12/22/2022]
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Valorization of the whole grains of Triticum aestivum L. and Triticum vulgare L. through the investigation of their biochemical composition and in vitro antioxidant, anti-inflammatory, anticancer and anticalpain activities. J Cereal Sci 2017. [DOI: 10.1016/j.jcs.2017.04.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Kapepula PM, Kabamba Ngombe N, Tshisekedi Tshibangu P, Tsumbu C, Franck T, Mouithys-Mickalad A, Mumba D, Tshala-Katumbay D, Serteyn D, Tits M, Angenot L, Kalenda PDT, Frédérich M. Comparison of metabolic profiles and bioactivities of the leaves of three edible Congolese Hibiscus species. Nat Prod Res 2017; 31:2885-2892. [PMID: 28322589 DOI: 10.1080/14786419.2017.1305382] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Methanolic and dichloromethane extracts from the leaves of Congolese Hibiscus species were characterised by chromatographic and spectroscopic techniques and their in vitro biochemical activities against ROS production were evaluated in cellular models and on an enzyme, myeloperoxidase (MPO), involved in inflammation. Hibiscus acetosella has a chemical fingerprint different from Hibiscus cannabinus and Hibiscus sabdariffa both having similar fingerprints. Major compounds were polyphenols, represented mainly by caffeoyl-hydroxycitric acid for H. acetosella and neochlorogenic acid for the two other species. All extracts displayed high cellular antioxidant activity with IC50 values ranging from 0.5 to 3 μg mL-1 using lucigenin on neutrophils. Dichloromethane extracts showed more efficient effects on extracellular ROS production and MPO activity. Antioxidant and anti-inflammatory activities of caffeoyl-hydroxycitric acid were significantly higher than those of neochlorogenic acid. The bioactivities of Hibiscus species were positively correlated with their phytochemical content and could justify their use as local nutraceutical resources and medicines.
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Affiliation(s)
- Paulin Mutwale Kapepula
- a Laboratory of Pharmacognosy , Center for Interdisciplinary Research on Medicines (CIRM), University of Liège , Liège , Belgium.,b Faculty of Pharmaceutical Sciences , Centre d'Etudes des Substances Naturelles d'Origine Végétale (CESNOV), University of Kinshasa , Kinshasa , Democratic Republic of Congo
| | - Nadege Kabamba Ngombe
- b Faculty of Pharmaceutical Sciences , Centre d'Etudes des Substances Naturelles d'Origine Végétale (CESNOV), University of Kinshasa , Kinshasa , Democratic Republic of Congo
| | - Pascal Tshisekedi Tshibangu
- a Laboratory of Pharmacognosy , Center for Interdisciplinary Research on Medicines (CIRM), University of Liège , Liège , Belgium.,b Faculty of Pharmaceutical Sciences , Centre d'Etudes des Substances Naturelles d'Origine Végétale (CESNOV), University of Kinshasa , Kinshasa , Democratic Republic of Congo
| | - César Tsumbu
- a Laboratory of Pharmacognosy , Center for Interdisciplinary Research on Medicines (CIRM), University of Liège , Liège , Belgium
| | - Thierry Franck
- c Centre for Oxygen Research and Development (C.O.R.D.), University of Liège , Liège , Belgium
| | - Ange Mouithys-Mickalad
- c Centre for Oxygen Research and Development (C.O.R.D.), University of Liège , Liège , Belgium
| | - Dieudonné Mumba
- d Faculty of Medicine , University of Kinshasa , Kinshasa , Democratic Republic of Congo.,e Department of Parasitolgy , Institute National de Recherches Biomédicales (INRB) , Kinshasa , Democratic Republic of Congo
| | - Désiré Tshala-Katumbay
- d Faculty of Medicine , University of Kinshasa , Kinshasa , Democratic Republic of Congo.,f Department of Neurology , Oregon Health & Science University , Portland , USA
| | - Didier Serteyn
- c Centre for Oxygen Research and Development (C.O.R.D.), University of Liège , Liège , Belgium
| | - Monique Tits
- a Laboratory of Pharmacognosy , Center for Interdisciplinary Research on Medicines (CIRM), University of Liège , Liège , Belgium
| | - Luc Angenot
- a Laboratory of Pharmacognosy , Center for Interdisciplinary Research on Medicines (CIRM), University of Liège , Liège , Belgium
| | - Pascal Dibungi T Kalenda
- b Faculty of Pharmaceutical Sciences , Centre d'Etudes des Substances Naturelles d'Origine Végétale (CESNOV), University of Kinshasa , Kinshasa , Democratic Republic of Congo
| | - Michel Frédérich
- a Laboratory of Pharmacognosy , Center for Interdisciplinary Research on Medicines (CIRM), University of Liège , Liège , Belgium
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Tshisekedi Tshibangu P, Mutwale Kapepula P, Kabongo Kapinga MJ, Tujibikila Mukuta A, Kalenda DT, Tchinda AT, Mouithys-Mickalad AA, Jansen O, Cieckiewicz E, Tits M, Angenot L, Frédérich M. Antiplasmodial activity of Heinsia crinita (Rubiaceae) and identification of new iridoids. JOURNAL OF ETHNOPHARMACOLOGY 2017; 196:261-266. [PMID: 27890637 DOI: 10.1016/j.jep.2016.11.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 11/19/2016] [Accepted: 11/20/2016] [Indexed: 06/06/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Heinsia crinita is used in traditional medicine for the treatment of febrile illness and erectile dysfunction. Its stem bark powder is found in some peripheral markets in the Democratic Republic of the Congo (DRC) as a remedy against malaria. Investigations were conducted on crude extracts of leaves, fruits and stem barks in view to validate their use and to determine which plant part possesses the best antiplasmodial properties. MATERIALS AND METHODS Different plant parts were extracted with methanol, ethanol and dichloromethane. Based on the preliminary assays, the dichloromethane extract of the stem bark was subjected to fractionation using preparative HPLC system and column chromatography. This step led to the isolation of two new iridoids which had their structures elucidated by NMR, UV, MS and FT-IR spectroscopic techniques. Extracts and pure compounds were tested in vitro against the 3D7 strain of Plasmodium falciparum. The inhibition of the parasite growth was evaluated in vitro by colorimetric method (p-LDH assay) and their cytotoxicity evaluated in vitro against the human non-cancer fibroblast cell line (WI38) through WST1 assay. The in vivo antiplasmodial activity was assessed by the inhibition of Plasmodium berghei growth in infected mice treated with the ethanol extract of H. crinita stem bark at the concentrations of 200 and 300mg/Kg/day per os, using a protocol based on the 4-d suppressive test of Peters and compared to a non-treated negative control group of mice (growth =100%). Finally the antioxidant activity of the same extract was evaluated using ABTS, DPPH and cell-based assays. RESULTS A moderate in vitro antiplasmodial activity was observed for the dichloromethane extract of the stem bark of H. crinita (IC50 =29.2±1.39µg/mL) and for the two new iridoids, lamalbide 6, 7, 8- triacetate (IC50 =16.39±0.43µg/mL) as well as for its aglycone lamiridosin 6, 7, 8-triacetate (IC50 =0.44.56±1.12µg/mL). The ethanolic stem bark extract (200 and 300mg/kg/day, oral route) showed a moderate in vivo antimalarial activity in Plasmodium berghei-infected mice with 27.84±2.75% and 48.54±3.76% of inhibition of the parasite growth, respectively (p<0.01).). This extract displayed high cellular antioxidant activity using dichlorofluorescein-diacetate (DCFDA) on HL-60 monocytes. These crude extracts and pure compounds tested at the higher concentration of 100µg/mL did not show any cytotoxicity against WI38 cells. CONCLUSIONS The results showed that H. crinita extracts possess antimalarial activity and contain some unusual iridoids with moderate antiplasmodial activity, therefore justifying to some extent its traditional use by the local population in DRC for this purpose. This is the first report of the isolation and antiplasmodial activity of these two new iridoids.
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Affiliation(s)
- P Tshisekedi Tshibangu
- Laboratory of Pharmacognosy, Department of Pharmacy, CIRM, University of Liege (ULg), Avenue Hippocrate, 15 B36, B-4000 Liège, Belgium; University of Kinshasa (UNIKIN), Department of Medicinal Chemistry and Pharmacognosy, School of Pharmaceutical Sciences, P.O. Box 212, Kinshasa XI, Democratic Republic of Congo
| | - P Mutwale Kapepula
- Laboratory of Pharmacognosy, Department of Pharmacy, CIRM, University of Liege (ULg), Avenue Hippocrate, 15 B36, B-4000 Liège, Belgium; University of Kinshasa (UNIKIN), Department of Medicinal Chemistry and Pharmacognosy, School of Pharmaceutical Sciences, P.O. Box 212, Kinshasa XI, Democratic Republic of Congo
| | - M J Kabongo Kapinga
- University of Kinshasa (UNIKIN), Department of Medicinal Chemistry and Pharmacognosy, School of Pharmaceutical Sciences, P.O. Box 212, Kinshasa XI, Democratic Republic of Congo
| | - A Tujibikila Mukuta
- University of Kinshasa (UNIKIN), Department of Medicinal Chemistry and Pharmacognosy, School of Pharmaceutical Sciences, P.O. Box 212, Kinshasa XI, Democratic Republic of Congo
| | - Dibungi T Kalenda
- University of Kinshasa (UNIKIN), Department of Medicinal Chemistry and Pharmacognosy, School of Pharmaceutical Sciences, P.O. Box 212, Kinshasa XI, Democratic Republic of Congo
| | - Alembert T Tchinda
- Laboratory of Phytochemistry, Institute of Medical Research and Medicinal Plants Studies, (IMPM), P.O. Box 13033, Yaoundé, Cameroon
| | - Ange A Mouithys-Mickalad
- Center for Oxygen Research and Development, Institute of Chemistry B6a, University of Liège, Sart Tilman, 4000 Liège, Belgium
| | - O Jansen
- Laboratory of Pharmacognosy, Department of Pharmacy, CIRM, University of Liege (ULg), Avenue Hippocrate, 15 B36, B-4000 Liège, Belgium
| | - E Cieckiewicz
- Laboratory of Pharmacognosy, Department of Pharmacy, CIRM, University of Liege (ULg), Avenue Hippocrate, 15 B36, B-4000 Liège, Belgium
| | - M Tits
- Laboratory of Pharmacognosy, Department of Pharmacy, CIRM, University of Liege (ULg), Avenue Hippocrate, 15 B36, B-4000 Liège, Belgium
| | - L Angenot
- Laboratory of Pharmacognosy, Department of Pharmacy, CIRM, University of Liege (ULg), Avenue Hippocrate, 15 B36, B-4000 Liège, Belgium
| | - M Frédérich
- Laboratory of Pharmacognosy, Department of Pharmacy, CIRM, University of Liege (ULg), Avenue Hippocrate, 15 B36, B-4000 Liège, Belgium.
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Puangjan A, Chaiyasith S. An efficient ZrO2/Co3O4/reduced graphene oxide nanocomposite electrochemical sensor for simultaneous determination of gallic acid, caffeic acid and protocatechuic acid natural antioxidants. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.04.185] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Franck T, Minguet G, Delporte C, Derochette S, Zouaoui Boudjeltia K, Van Antwerpen P, Gach O, Deby-Dupont G, Mouithys-Mickalad A, Serteyn D. An immunological method to combine the measurement of active and total myeloperoxidase on the same biological fluid, and its application in finding inhibitors which interact directly with the enzyme. Free Radic Res 2015; 49:790-9. [PMID: 25968947 DOI: 10.3109/10715762.2015.1027197] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Myeloperoxidase (MPO) is a pro-oxidant enzyme involved in inflammation, and the measurement of its activity in biological samples has emerged essential for laboratory and clinical investigations. We will describe a new method which combines the SIEFED (specific immunological extraction followed by enzymatic detection) and ELISA (ELISAcb) techniques to measure the active and total amounts of MPO on the same human sample and with the same calibration curve, as well as to define an accurate ratio between both the active and total forms of the enzyme. The SIEFED/ELISAcb method consists of the MPO extraction from aqueous or biological samples by immobilized anti-MPO antibodies coated onto microplate wells. After a washing step to eliminate unbound material, the activity of MPO is measured in situ by adding a reaction solution (SIEFED). Following aspiration of the reaction solution, a secondary anti-MPO antibody is added into the wells and the ELISAcb test is carried out in order to measure the total MPO content. To validate the combined method, a comparison was made with SIEFED and ELISA experiments performed separately on plasma samples isolated from human whole blood, after a neutrophil stimulation. The SIEFED/ELISAcb provides a suitable tool for the measurement of specific MPO activity in biological fluids and for the estimation of the inhibitory potential of a fluid. The method can also be used as a pharmacological tool to make the distinction between a catalytic inhibitor, which binds to MPO and inhibits its activity, and a steric inhibitor, which hinders the enzyme and prevents its immunodetection.
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Affiliation(s)
- T Franck
- Department of General Anaesthesia and Surgical Pathology of Large Animals, Faculty of Veterinary Medicine, B 41, University of Liege - Sart Tilman, Liège , Belgium
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Bizzarri BM, Pieri C, Botta G, Arabuli L, Mosesso P, Cinelli S, Schinoppi A, Saladino R. Synthesis and antioxidant activity of DOPA peptidomimetics by a novel IBX mediated aromatic oxidative functionalization. RSC Adv 2015. [DOI: 10.1039/c5ra09464j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
DOPA peptidomimetics with stable O–C and N–C covalent bonds between amino acid residues have been prepared by aromatic oxidative functionalization of tyrosine with 2-iodoxybenzoic acid (IBX).
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Affiliation(s)
| | - Cristina Pieri
- Department of Ecology and Biology
- University of Tuscia
- 01100 Viterbo
- Italy
| | - Giorgia Botta
- Department of Ecology and Biology
- University of Tuscia
- 01100 Viterbo
- Italy
| | - Lili Arabuli
- Department of Chemistry
- Javakhishvili Tbilisi State University
- Georgia
| | - Pasquale Mosesso
- Department of Ecology and Biology
- University of Tuscia
- 01100 Viterbo
- Italy
| | - Serena Cinelli
- Research Toxicology Center Menarini
- 00040 Pomezia (Roma)
- Italy
| | - Angelo Schinoppi
- Department of Ecology and Biology
- University of Tuscia
- 01100 Viterbo
- Italy
| | - Raffele Saladino
- Department of Ecology and Biology
- University of Tuscia
- 01100 Viterbo
- Italy
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14
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Koroleva O, Torkova A, Nikolaev I, Khrameeva E, Fedorova T, Tsentalovich M, Amarowicz R. Evaluation of the antiradical properties of phenolic acids. Int J Mol Sci 2014; 15:16351-80. [PMID: 25229820 PMCID: PMC4200783 DOI: 10.3390/ijms150916351] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 09/05/2014] [Accepted: 09/09/2014] [Indexed: 12/27/2022] Open
Abstract
Antioxidant capacity (AOC) against peroxyl radical and 2,2'-azino-bis-(3-ethylbenzothiazoline-6-sulphonic acid) diammonium salt (ABTS) radical cation was measured for a series of p-hydroxybenzoic (HB) and p-hydroxycinnamic (HC) acids at different pH. Quantum-chemical computation was performed using Gaussian 3.0 software package to calculate the geometry and energy parameters of the same compounds. Significant correlations were revealed between AOC and a number of calculated parameters. The most significant AOC descriptors for the studied compounds against peroxyl radical were found to be HOMO energy, rigidity (η) and Mulliken charge on the carbon atom in m-position to the phenolic hydroxyl. The most significant descriptor of the antioxidant properties against the ABTS radical cation at рН 7.40 is electron transfer enthalpy from the phenolate ion. The mechanism of AOC realization has been proposed for HB and HC acids against both radicals.
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Affiliation(s)
- Olga Koroleva
- Bach Institute of Biochemistry of the Russian Academy of Sciences, Leninsky Prospekt, 33, bld 2, 119071 Moscow, Russia.
| | - Anna Torkova
- Bach Institute of Biochemistry of the Russian Academy of Sciences, Leninsky Prospekt, 33, bld 2, 119071 Moscow, Russia.
| | - Ilya Nikolaev
- Bach Institute of Biochemistry of the Russian Academy of Sciences, Leninsky Prospekt, 33, bld 2, 119071 Moscow, Russia.
| | - Ekaterina Khrameeva
- Department of Bioengineering and Bioinformatics, Moscow State University, GSP-1, Leninskie Hills, bld 73, 119234 Moscow, Russia.
| | - Tatyana Fedorova
- Bach Institute of Biochemistry of the Russian Academy of Sciences, Leninsky Prospekt, 33, bld 2, 119071 Moscow, Russia.
| | - Mikhail Tsentalovich
- Bach Institute of Biochemistry of the Russian Academy of Sciences, Leninsky Prospekt, 33, bld 2, 119071 Moscow, Russia.
| | - Ryszard Amarowicz
- Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima Street 10, 10-748 Olsztyn, Poland.
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