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Vargas-Munévar L, Borja-Fajardo J, Sandoval-Aldana A, García WQ, Moreno EM, Henriquez JC, Stashenko E, García LT, García-Beltrán O. Microencapsulation of Theobroma cacao L polyphenols: A high-value approach with in vitro anti-Trypanosoma cruzi, immunomodulatory and antioxidant activities. Biomed Pharmacother 2024; 173:116307. [PMID: 38401521 DOI: 10.1016/j.biopha.2024.116307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 02/09/2024] [Accepted: 02/17/2024] [Indexed: 02/26/2024] Open
Abstract
Chagas disease (CHD) is the highest economic burden parasitosis worldwide and the most important cardiac infection, without therapeutic alternatives to halt or reverse its progression. In CHD-experimental models, antioxidant and anti-inflammatory compounds have demonstrated therapeutic potential in cardiac dysfunction. Theobroma cacao polyphenols are potent natural antioxidants with cardioprotective and anti-inflammatory action, which are susceptible to degradation, requiring technological approaches to guarantee their protection, stability, and controlled release. Here, 21 cocoa polyphenol-rich microencapsulates were produced by spray-drying and freeze-drying techniques using two wall materials (maltodextrin and gum arabic). Chemical (total and individual phenolic content and antioxidant activity), structural (morphology), and biological parameters (cytotoxicity, trypanocidal, antioxidant, and immunomodulatory activities) were assessed to determine the most efficient microencapsulation conditions on Trypanosoma cruzi-infected myocardioblast and macrophage cells. Significant antiproliferative properties against infected cells (superior to benznidazole) were found in two microencapsulates which also exhibited cardioprotective properties against oxidative stress, inflammation, and cell death.
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Affiliation(s)
- Laura Vargas-Munévar
- Posgradute Department in Infectious Disease, Universidad de Santander, Bucaramanga 680006, Colombia
| | | | | | - Wendy Quintero García
- Posgradute Department in Infectious Disease, Universidad de Santander, Bucaramanga 680006, Colombia
| | - Erika Moreno Moreno
- Posgradute Department in Infectious Disease, Universidad de Santander, Bucaramanga 680006, Colombia
| | - Juan Camilo Henriquez
- National Research Center for the Agroindustrialization of Aromatic and Medicinal Tropical Species (CENIVAM), Universidad Industrial de Santander, Bucaramanga 680002, Colombia
| | - Elena Stashenko
- National Research Center for the Agroindustrialization of Aromatic and Medicinal Tropical Species (CENIVAM), Universidad Industrial de Santander, Bucaramanga 680002, Colombia
| | - Liliana Torcoroma García
- Posgradute Department in Infectious Disease, Universidad de Santander, Bucaramanga 680006, Colombia.
| | - Olimpo García-Beltrán
- Centro Integrativo de Biología y Química Aplicada (CIBQA), Universidad Bernardo O' Higgins, Santiago 8370854, Chile; Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Ibagué 730002, Colombia.
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Segura C, Ormazabal-Toledo R, García-Beltrán O, Squeo BM, Bachmann C, Flores C, Osorio-Román IO. Photophysical Analysis of Aggregation-Induced Emission (AIE) Luminogens Based on Triphenylamine and Thiophene: Insights into Emission Behavior in Solution and PMMA Films. Chemistry 2024; 30:e202302940. [PMID: 38078547 DOI: 10.1002/chem.202302940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Indexed: 12/30/2023]
Abstract
Aggregation-Induced Emission (AIE) luminogens have garnered significant interest due to their distinctive applications in different applications. Among the diverse molecular architectures, those based on triphenylamine and thiophene hold prominence. However, a comprehensive understanding of the deactivation mechanism both in solution and films remains lacking. In this study, we synthesized and characterized spectroscopically two AIE luminogens: 5-(4-(bis(4-methoxyphenyl)amino)phenyl)thiophene-2-carbaldehyde (TTY) and 5'-(4-(bis(4-methoxyphenyl)amino)phenyl)-[2,2'-bithiophene]-5-carbaldehyde (TTO). Photophysical and theoretical analyses were conducted in both solution and PMMA films to understand the deactivation mechanism of TTY and TTO. In diluted solutions, the emission behavior of TTY and TTO is influenced by the solvent, and the deactivation of the excited state can occur via locally excited (LE) or twisted intramolecular charge transfer (TICT) state. In PMMA films, rotational and translational movements are constrained, necessitating emission solely from the LE state. Nevertheless, in the PMMA film, excimers-like structures form, resulting in the emergence of a longer wavelength band and a reduction in emission intensity. The zenith of emission intensity occurs when molecules are dispersed at higher concentrations within PMMA, effectively diminishing the likelihood of excimer-like formations. Luminescent Solar Concentrators (LSC) were fabricated to validate these findings, and the optical efficiency was studied at varying concentrations of luminogen and PMMA.
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Affiliation(s)
- Camilo Segura
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Ñuñoa, Región Metropolitana, Chile
| | - Rodrigo Ormazabal-Toledo
- Departamento de Química Orgánica y Fisicoquímica, Facultad de Ciencias Químicas y Farmaceúticas, Universidad de Chile, Dr. Carlos Lorca Tobar 964, Independencia, Región Metropolitana, Chile
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué, Colombia
- Centro Integrativo de Biología y Química Aplicada (CIBQA), Universidad Bernardo O'Higgins, General Gana 1702, Santiago, Región Metropolitana, Chile
| | - Benedetta M Squeo
- Istituto di Scienze e Tecnologie Chimiche (SCITEC), Consiglio Nazionale delle Ricerche (CNR), Via A. Corti, 20133, Milano, Italy
| | - Cristian Bachmann
- Instituto de Ciencias Químicas, Facultad de Ciencias, Universidad Austral de Chile, Av. Rector Eduardo Morales 33, Valdivia, 509000, Chile
| | - Catalina Flores
- Instituto de Ciencias Químicas, Facultad de Ciencias, Universidad Austral de Chile, Av. Rector Eduardo Morales 33, Valdivia, 509000, Chile
| | - Igor O Osorio-Román
- Instituto de Ciencias Químicas, Facultad de Ciencias, Universidad Austral de Chile, Av. Rector Eduardo Morales 33, Valdivia, 509000, Chile
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Yañez O, Osorio MI, Osorio E, Tiznado W, Ruíz L, García C, Nagles O, Simirgiotis MJ, Castañeta G, Areche C, García-Beltrán O. Antioxidant activity and enzymatic of lichen substances: A study based on cyclic voltammetry and theoretical. Chem Biol Interact 2023; 372:110357. [PMID: 36693444 DOI: 10.1016/j.cbi.2023.110357] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 01/11/2023] [Accepted: 01/20/2023] [Indexed: 01/22/2023]
Abstract
The antioxidant activity of nine lichen substances, including methylatrarate (1), methyl haematommate (2), lobaric acid (3), fumarprotocetraric acid (4), sphaerophorin (5), subsphaeric acid (6), diffractaic acid (7), barbatolic acid (8) and salazinic acid (9) has been determined through cyclic voltammetry. The compounds 1-4 presented slopes close to the Nernst constant of 0.059 V, indicating a 2H+/2e- relation between protons and electrons, as long as the compounds 5, 6, 7, 8, and 9 present slopes between 0.037 V and 0.032 V, indicating a 1H+/2e- relation between protons and electrons. These results show a high free radical scavenging activity by means of the release of H+, suggesting an important antioxidant capacity of these molecules. Theoretical calculations of hydrogen bond dissociation enthalpies (BDE), proton affinities (PA), and Proton Transfer (PT) mechanisms, at M06-2x/6-311+G(d,p) level complement the experimental results. Computations support that the best antioxidant activity is obtained for the molecules (3, 4, 5, 6, 7 and 8), that have a carboxylic acid group close to a phenolic hydroxyl group, through hydrogen atomic transfer (HAT) and sequential proton loss electron transfer (SPLET) mechanisms. Additional computations were performed for modelling binding affinity of the lichen substances with CYPs enzymes, mainly CYP1A2, CYP51, and CYP2C9*2 isoforms, showing strong affinity for all the compounds described in this study.
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Affiliation(s)
- Osvaldo Yañez
- Facultad de Ingeniería y Negocios, Universidad de las Américas, Santiago, 7500000, Chile; Center of New Drugs for Hypertension (CENDHY), Santiago, 8380494, Chile
| | - Manuel I Osorio
- Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias de la Vida, Universidad Andres Bello, Av. República 330, Santiago, 8370146, Chile; Facultad de Medicina, Centro de Investigación Biomédica, Universidad Diego Portales, Ejército 141, Santiago, 837007, Chile
| | - Edison Osorio
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué, 730002, Colombia
| | - William Tiznado
- Facultad de Ciencias Exactas, Departamento de Ciencias Químicas, Universidad Andrés Bello, Avenida República 275, Piso 3, Santiago, Chile
| | - Lina Ruíz
- Centro de Investigación Biomédica, Universidad Autónoma de Chile, Santiago, Chile
| | - Camilo García
- Universidad Católica de Temuco, Facultad de Recursos Naturales, Departamento de Ciencias Biológicas y Químicas, Avenida Rudecindo Ortega, 02950, Campus San Juan Pablo II, Temuco, Chile
| | - Orlando Nagles
- Facultad de Química e Ingeniería, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Mario J Simirgiotis
- Instituto de Farmacia, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja, Valdivia, 5090000, Chile
| | - Grover Castañeta
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago, Chile
| | - Carlos Areche
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago, Chile.
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué, 730002, Colombia; Centro Integrativo de Biología y Química Aplicada (CIBQA), Universidad Bernardo O'Higgins, General Gana 1702, Santiago, 8370854, Chile.
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Fouché B, Turner S, Gorham R, Stephenson EJ, Gutbier S, Elson JL, García-Beltrán O, Van Der Westhuizen FH, Pienaar IS. A Novel Mitochondria-Targeting Iron Chelator Neuroprotects Multimodally via HIF-1 Modulation Against a Mitochondrial Toxin in a Dopaminergic Cell Model of Parkinson's Disease. Mol Neurobiol 2023; 60:749-767. [PMID: 36357615 DOI: 10.1007/s12035-022-03107-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 10/25/2022] [Indexed: 11/12/2022]
Abstract
Coumarins are plant-derived polyphenolic compounds belonging to the benzopyrones family, possessing wide-ranging pharmaceutical applications including cytoprotection, which may translate into therapeutic potential for multiple diseases, including Parkinson's disease (PD). Here we demonstrate the neuroprotective potential of a new polyhydroxyl coumarin, N-(1,3-dihydroxy-2-(hydroxymethyl)propan-2-yl)-2-(7-hydroxy-2-oxo-2H-chromen-4-yl)acetamide (CT51), against the mitochondrial toxin 1-methyl-4-phenylpyridinium (MPP+). MPP+'s mechanism of toxicity relates to its ability to inhibit complex I of the mitochondrial electron transport chain (METC), leading to adenosine triphosphate (ATP) depletion, increased reactive oxygen species (ROS) production, and apoptotic cell death, hence mimicking PD-related neuropathology. Dopaminergic differentiated human neuroblastoma cells were briefly pretreated with CT51, followed by toxin exposure. CT51 significantly restored somatic cell viability and neurite processes; hence, the drug targets cell bodies and axons thereby preserving neural function and circuitry against PD-related damage. Moreover, MPP+ emulates the iron dyshomeostasis affecting dopaminergic neurons in PD-affected brains, whilst CT51 was previously revealed as an effective iron chelator that preferentially partitions to mitochondria. We extend these findings by characterising the drug's interactive effects at the METC level. CT51 did not improve mitochondrial coupling efficiency. However, voltammetric measurements and high-resolution respirometry analysis revealed that CT51 acts as an antioxidant agent. Also, the neuronal protection afforded by CT51 associated with downregulating MPP+-induced upregulated expression of hypoxia-inducible factor 1 alpha (HIF-1α), a protein which regulates iron homeostasis and protects against certain forms of oxidative stress after translocating to mitochondria. Our findings support the further development of CT51 as a dual functioning iron chelator and antioxidant antiparkinsonian agent.
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Affiliation(s)
- Belinda Fouché
- Centre for Human Metabolomics, North-West University, Potchefstroom, South Africa
| | - Stephanie Turner
- School of Life Sciences, University of Sussex, Falmer, Brighton, UK
| | - Rebecca Gorham
- School of Life Sciences, University of Sussex, Falmer, Brighton, UK
| | | | - Simon Gutbier
- Unit for In Vitro Toxicology and Biomedicine, Department Inaugurated By the Doeren Kamp-Zbinden Foundation, University of Konstanz, 78457, Konstanz, Germany
| | - Joanna L Elson
- Centre for Human Metabolomics, North-West University, Potchefstroom, South Africa.,The Welcome Trust Centre for Mitochondrial Research, Biosciences Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Olimpo García-Beltrán
- Centro Integrativo de Biología Y Química Aplicada, Universidad Bernardo O'Higgins, Santiago, Chile.,Facultad de Ciencias Naturales Y Matemáticas, Universidad de Ibagué, Ibagué, Colombia
| | | | - Ilse S Pienaar
- Centre for Human Metabolomics, North-West University, Potchefstroom, South Africa. .,Institute of Clinical Sciences, University of Birmingham, Edgbaston, Birmingham, B12 2TT, UK.
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García-Beltrán O, Urrutia PJ, Núñez MT. On the Chemical and Biological Characteristics of Multifunctional Compounds for the Treatment of Parkinson's Disease. Antioxidants (Basel) 2023; 12:antiox12020214. [PMID: 36829773 PMCID: PMC9952574 DOI: 10.3390/antiox12020214] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 01/12/2023] [Accepted: 01/12/2023] [Indexed: 01/18/2023] Open
Abstract
Protein aggregation, mitochondrial dysfunction, iron dyshomeostasis, increased oxidative damage and inflammation are pathognomonic features of Parkinson's disease (PD) and other neurodegenerative disorders characterized by abnormal iron accumulation. Moreover, the existence of positive feed-back loops between these pathological components, which accelerate, and sometimes make irreversible, the neurodegenerative process, is apparent. At present, the available treatments for PD aim to relieve the symptoms, thus improving quality of life, but no treatments to stop the progression of the disease are available. Recently, the use of multifunctional compounds with the capacity to attack several of the key components of neurodegenerative processes has been proposed as a strategy to slow down the progression of neurodegenerative processes. For the treatment of PD specifically, the necessary properties of new-generation drugs should include mitochondrial destination, the center of iron-reactive oxygen species interaction, iron chelation capacity to decrease iron-mediated oxidative damage, the capacity to quench free radicals to decrease the risk of ferroptotic neuronal death, the capacity to disrupt α-synuclein aggregates and the capacity to decrease inflammatory conditions. Desirable additional characteristics are dopaminergic neurons to lessen unwanted secondary effects during long-term treatment, and the inhibition of the MAO-B and COMPT activities to increase intraneuronal dopamine content. On the basis of the published evidence, in this work, we review the molecular basis underlying the pathological events associated with PD and the clinical trials that have used single-target drugs to stop the progress of the disease. We also review the current information on multifunctional compounds that may be used for the treatment of PD and discuss the chemical characteristics that underlie their functionality. As a projection, some of these compounds or modifications could be used to treat diseases that share common pathology features with PD, such as Friedreich's ataxia, Multiple sclerosis, Huntington disease and Alzheimer's disease.
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Affiliation(s)
- Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué 730002, Colombia
- Centro Integrativo de Biología y Química Aplicada (CIBQA), Universidad Bernardo O’Higgins, General Gana 1702, Santiago 8370854, Chile
- Correspondence:
| | - Pamela J. Urrutia
- Faculty of Medicine and Science, Universidad San Sebastián, Lota 2465, Santiago 7510157, Chile
| | - Marco T. Núñez
- Faculty of Sciences, Universidad de Chile, Las Palmeras 3425, Santiago 7800024, Chile
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6
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Segura C, Yañez O, Galdámez A, Tapia V, Núñez MT, Osorio-Román I, García C, García-Beltrán O. Synthesis and characterization of a novel colorimetric and fluorometric probe “Turn-on” for the detection of Cu2+ of derivatives rhodamine. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Areche C, Parra JR, Sepulveda B, García-Beltrán O, Simirgiotis MJ. UHPLC-MS Metabolomic Fingerprinting, Antioxidant, and Enzyme Inhibition Activities of Himantormia lugubris from Antarctica. Metabolites 2022; 12:metabo12060560. [PMID: 35736493 PMCID: PMC9227586 DOI: 10.3390/metabo12060560] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/12/2022] [Accepted: 06/16/2022] [Indexed: 01/22/2023] Open
Abstract
Himantormia lugubris is a Chilean native small lichen shrub growing in the Antarctica region. In this study, the metabolite fingerprinting and the antioxidant and enzyme inhibitory potential from this species and its four major isolated compounds were investigated for the first time. Using ultra-high performance liquid chromatography coupled to quadrupole-Orbitrap mass spectrometry analysis (UHPLC-Q-Orbitrap-MS), several metabolites were identified including specific compounds as chemotaxonomical markers, while major metabolites were quantified in this species. A good inhibition activity against cholinesterase (acetylcholinesterase (AChE) IC50: 12.38 ± 0.09 µg/mL, butyrylcholinesterase (BChE) IC50: 31.54 ± 0.20 µg/mL) and tyrosinase (22.32 ± 0.21 µg/mL) enzymes of the alcoholic extract and the main compounds (IC50: 28.82 ± 0.10 µg/mL, 36.43 ± 0.08 µg/mL, and 7.25 ± 0.18 µg/mL, respectively, for the most active phenolic atranol) was found. The extract showed a total phenolic content of 47.4 + 0.0 mg of gallic acid equivalents/g. In addition, antioxidant activity was assessed using bleaching of DPPH and ORAC (IC50: 75.3 ± 0.02 µg/mL and 32.7 ± 0.7 μmol Trolox/g lichen, respectively) and FRAP (27.8 ± 0.0 μmol Trolox equivalent/g) experiments. The findings suggest that H. lugubris is a rich source of bioactive compounds with potentiality in the prevention of neurodegenerative or noncommunicable chronic diseases.
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Affiliation(s)
- Carlos Areche
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Nuñoa, Santiago 7800024, Chile
- Correspondence: (C.A.); (M.J.S.); Tel.: +51-956-379-865 (C.A.); +56-(63)-2386110 (M.J.S.)
| | - Javier Romero Parra
- Departamento de Química Orgánica y Fisicoquímica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Olivos 1007, Casilla, Santiago 6640022, Chile;
| | - Beatriz Sepulveda
- Departamento de Ciencias Químicas, Viña del Mar, Universidad Andres Bello, Viña del Mar 2520000, Chile;
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué 730001, Colombia;
| | - Mario J. Simirgiotis
- Instituto de Farmacia, Facultad de Ciencias, Universidad Austral de Chile, Elena Haverbeck S-N, Valdivia 5090000, Chile
- Correspondence: (C.A.); (M.J.S.); Tel.: +51-956-379-865 (C.A.); +56-(63)-2386110 (M.J.S.)
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Sierra K, de Andrade JP, R Tallini L, Osorio EH, Yañéz O, Osorio MI, Oleas NH, García-Beltrán O, de S Borges W, Bastida J, Osorio E, Cortes N. In vitro and in silico analysis of galanthine from Zephyranthes carinata as an inhibitor of acetylcholinesterase. Biomed Pharmacother 2022; 150:113016. [PMID: 35483192 DOI: 10.1016/j.biopha.2022.113016] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 04/15/2022] [Accepted: 04/19/2022] [Indexed: 02/08/2023] Open
Abstract
Zephyranthes carinata Herb., a specie of the Amaryllidoideae subfamily, has been reported to have inhibitory activity against acetylcholinesterase. However, scientific evidence related to their bioactive alkaloids has been lacking. Thus, this study describes the isolation of the alkaloids of this plant, and their inhibition of the enzymes acetylcholinesterase (eeAChE) and butyrylcholinesterase (eqBuChE), being galanthine the main component. Additionally, haemanthamine, hamayne, lycoramine, lycorine, tazettine, trisphaeridine and vittatine/crinine were also isolated. The results showed that galanthine has significant activity at low micromolar concentrations for eeAChE (IC50 = 1.96 μg/mL). The in-silico study allowed to establish at a molecular level the high affinity and the way galanthine interacts with the active site of the TcAChE enzyme, information that corroborates the result of the experimental IC50. However, according to molecular dynamics (MD) analysis, it is also suggested that galanthine presents a different inhibition mode that the one observed for galanthamine, by presenting interaction with peripheral anionic binding site of the enzyme, which prevents the entrance and exit of molecules from the active site. Thus, in vitro screening assays plus rapid computer development play an essential role in the search for new cholinesterase inhibitors by identifying unknown bio-interactions between bioactive compounds and biological targets.
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Affiliation(s)
- Karina Sierra
- Grupo de Investigación en Sustancias Bioactivas, Facultad de Ciencias Farmacéuticas y Alimentarias, Universidad de Antioquía UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Jean Paulo de Andrade
- Núcleo Científico Multidisciplinario, Dirección de Investigación, Universidad de Talca, Campus Lircay, CP 3460000, Talca, Chile
| | - Luciana R Tallini
- Programa de Pós-graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul, Av. Ipiranga 2752, 90610-0000 Porto Alegre, Brazil; Grup de Productes Naturals, Departament de Biologia, Sanitat i Medi Ambient, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Av. Joan XXIII, 27-31, 08028 Barcelona, Spain
| | - Edison H Osorio
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 calle 67, Ibagué, Colombia
| | - Osvaldo Yañéz
- Center of New Drugs for Hypertension (CENDHY), Santiago 8380494, Chile; Facultad de Ingeniería y Negocios, Universidad de las Américas, Santiago 7500000, Chile
| | - Manuel Isaías Osorio
- Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile; Facultad de Medicina, Universidad Diego Portales, Santiago, Chile
| | - Nora H Oleas
- Centro de Investigación de la Biodiversidad y Cambio Climático (BioCamb) e Ingeniería en Biodiversidad y Recursos Genéticos, Facultad de Ciencias de Medio Ambiente, Universidad Tecnológica Indoamérica, Machala y Sabanilla, EC170301 Quito, Ecuador
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 calle 67, Ibagué, Colombia
| | - Warley de S Borges
- Departamento de Química, Universidade Federal do Espírito Santo, Avenida Fernando Ferrari 514, Goiabeiras, 29075-910 Vitória, Espírito Santo, Brazil
| | - Jaume Bastida
- Grup de Productes Naturals, Departament de Biologia, Sanitat i Medi Ambient, Facultat de Farmàcia i Ciències de l'Alimentació, Universitat de Barcelona, Av. Joan XXIII, 27-31, 08028 Barcelona, Spain
| | - Edison Osorio
- Grupo de Investigación en Sustancias Bioactivas, Facultad de Ciencias Farmacéuticas y Alimentarias, Universidad de Antioquía UdeA, Calle 70 No. 52-21, Medellín, Colombia.
| | - Natalie Cortes
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 calle 67, Ibagué, Colombia.
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Gómez K, Quenguan F, Aristizabal D, Escobar G, Quiñones W, García-Beltrán O, Durango D. Elicitation of isoflavonoids in Colombian edible legume plants with jasmonates and structurally related compounds. Heliyon 2022; 8:e08979. [PMID: 35243097 PMCID: PMC8873548 DOI: 10.1016/j.heliyon.2022.e08979] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 01/17/2022] [Accepted: 02/14/2022] [Indexed: 12/03/2022] Open
Abstract
Common bean (Phaseolus vulgaris L.), soybean (Glycine max L.) and mung bean (Vigna radiata L. Wilczek) seedlings were treated with methyl jasmonate (MeJA); then, dose-response and time-course experiments were carried out. Isoflavonoid composition was evaluated by high performance liquid chromatography. As a result of MeJA induction, all leguminous plants increase the amount of isoflavonoids, at levels that depend on the concentration of the elicitor and the time after induction. However, the application of MeJA in concentrations higher than 2.22 mM showed deleterious effects on seedlings and strong decreases in the concentration of isoflavonoids. In addition, a series of compounds structurally related to MeJA, such as jasmonic acid, cis-jasmone, coronatine, and indanoyl derivatives, were evaluated as elicitors. The results show that coronatine and the indanoyl-amino acids conjugates displayed a significant elicitor effect of isoflavonoids in common bean (cvs. Cargamanto Mocho and Corpoica LAS 106) and soybean (cv. Soyica P-34) seedlings, even higher than that found with the recognized elicitors, benzo (1,2,3) thiadiazole-7-carbothioic acid S-methyl ester (acibenzolar S-methyl) and benzo-(1,2,3) thiadiazole-7-carbothioic acid (acibenzolar acid). Leguminous plants can be treated with jasmonates and indanoyl derivatives to increase levels of bioactive isoflavonoids and consequently improve biological and functional properties and resistance against pests. The accumulation of isoflavonoids in edible legume seedlings treated with jasmonates and structurally related compounds was analyzed. Time-course and dose-response experiments were performed using methyl jasmonate as elicitor. The application of jasmonates and structurally related compounds increased the concentration of bioactive isoflavonoids. The amount of isoflavonoids depended on the cultivar, the concentration and structure of the elicitor, and the post-induction time.
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Affiliation(s)
- Karen Gómez
- Universidad Nacional de Colombia, Sede Medellín, Facultad de Ciencias, Escuela de Química, Carrera 65, Nº 59-110, Medellín, Colombia
| | - Franklin Quenguan
- Universidad Nacional de Colombia, Sede Medellín, Facultad de Ciencias, Escuela de Química, Carrera 65, Nº 59-110, Medellín, Colombia
| | - Diego Aristizabal
- Universidad Nacional de Colombia, Sede Medellín, Facultad de Ciencias, Escuela de Química, Carrera 65, Nº 59-110, Medellín, Colombia
| | - Gustavo Escobar
- Química Orgánica de Productos Naturales, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, Calle 70 N° 52-21, P.O. Box 1226, Medellín, Colombia
| | - Winston Quiñones
- Química Orgánica de Productos Naturales, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, Calle 70 N° 52-21, P.O. Box 1226, Medellín, Colombia
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué, 730002, Colombia.,Universidad Bernardo O'Higgins, Centro Integrativo de Biología y Química Aplicada (CIBQA), General Gana 1702, Santiago, 8370854, Chile
| | - Diego Durango
- Universidad Nacional de Colombia, Sede Medellín, Facultad de Ciencias, Escuela de Química, Carrera 65, Nº 59-110, Medellín, Colombia
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Florian SU, Sepulveda B, Torres-Benítez A, Simirgiotis MJ, Fuentes-Estrada M, Areche C, García-Beltrán O. Erythrinoid and indol alkaloids isolated from the seeds of Erythrina rubrinervia Kunth: Chemotaxonomic significance. BIOCHEM SYST ECOL 2021. [DOI: 10.1016/j.bse.2021.104295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Yañez O, Osorio MI, Areche C, Vasquez-Espinal A, Bravo J, Sandoval-Aldana A, Pérez-Donoso JM, González-Nilo F, Matos MJ, Osorio E, García-Beltrán O, Tiznado W. Theobroma cacao L. compounds: Theoretical study and molecular modeling as inhibitors of main SARS-CoV-2 protease. Biomed Pharmacother 2021; 140:111764. [PMID: 34051617 PMCID: PMC8141698 DOI: 10.1016/j.biopha.2021.111764] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Revised: 05/07/2021] [Accepted: 05/20/2021] [Indexed: 11/23/2022] Open
Abstract
Cocoa beans contain antioxidant molecules with the potential to inhibit type 2 coronavirus (SARS-CoV-2), which causes a severe acute respiratory syndrome (COVID-19). In particular, protease. Therefore, using in silico tests, 30 molecules obtained from cocoa were evaluated. Using molecular docking and quantum mechanics calculations, the chemical properties and binding efficiency of each ligand was evaluated, which allowed the selection of 5 compounds of this series. The ability of amentoflavone, isorhoifolin, nicotiflorin, naringin and rutin to bind to the main viral protease was studied by means of free energy calculations and structural analysis performed from molecular dynamics simulations of the enzyme/inhibitor complex. Isorhoifolin and rutin stand out, presenting a more negative binding ΔG than the reference inhibitor N-[(5-methylisoxazol-3-yl)carbonyl]alanyl-l-valyl-N~1~-((1R,2Z)−4-(benzyloxy)−4-oxo-1-{[(3R)−2-oxopyrrolidin-3-yl]methyl}but-2-enyl)-L-leucinamide (N3). These results are consistent with high affinities of these molecules for the major SARS-CoV-2. The results presented in this paper are a solid starting point for future in vitro and in vivo experiments aiming to validate these molecules and /or test similar substances as inhibitors of SARS-CoV-2 protease.
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Affiliation(s)
- Osvaldo Yañez
- Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, República 498, Santiago, Chile; Center of New Drugs for Hypertension (CENDHY), Santiago, Chile; Department of Pharmaceutical Science and Technology, School of Chemical and Pharmaceutical Sciences, Universidad de Chile, Santiago, Chile
| | - Manuel Isaías Osorio
- Facultad de Medicina, Centro de Investigación Biomédica, Universidad Diego Portales, Ejército 141, Santiago 837007, Chile; Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias de la Vida, Universidad Andres Bello, Av. República 330, Santiago 8370146, Chile
| | - Carlos Areche
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Nuñoa, Santiago 7800024, Chile
| | - Alejandro Vasquez-Espinal
- Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, República 498, Santiago, Chile
| | - Jessica Bravo
- Facultad de Medicina, Centro de Investigación Biomédica, Universidad Diego Portales, Ejército 141, Santiago 837007, Chile
| | - Angélica Sandoval-Aldana
- Grupo Interdisciplinario de Investigación en Fruticultura Tropical, Facultad de Ingeniería Agronómica, Universidad del Tolima, Ibagué 730006, Colombia
| | - José M Pérez-Donoso
- Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias de la Vida, Universidad Andres Bello, Av. República 330, Santiago 8370146, Chile
| | - Fernando González-Nilo
- Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias de la Vida, Universidad Andres Bello, Av. República 330, Santiago 8370146, Chile
| | - Maria João Matos
- CIQUP/Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, 4169-007 Porto, Portugal
| | - Edison Osorio
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 calle 67, Ibagué 730002, Colombia
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 calle 67, Ibagué 730002, Colombia; Universidad Bernardo O'Higgins, Centro Integrativo de Biología y Química Aplicada (CIBQA), General Gana 1702, Santiago, Chile, 8370854.
| | - William Tiznado
- Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, República 498, Santiago, Chile.
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12
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Moya-Alvarado G, Yañez O, Morales N, González-González A, Areche C, Núñez MT, Fierro A, García-Beltrán O. Coumarin-Chalcone Hybrids as Inhibitors of MAO-B: Biological Activity and In Silico Studies. Molecules 2021; 26:molecules26092430. [PMID: 33921982 PMCID: PMC8122463 DOI: 10.3390/molecules26092430] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 04/17/2021] [Accepted: 04/18/2021] [Indexed: 01/22/2023] Open
Abstract
Fourteen coumarin-derived compounds modified at the C3 carbon of coumarin with an α,β-unsaturated ketone were synthesized. These compounds may be designated as chalcocoumarins (3-cinnamoyl-2H-chromen-2-ones). Both chalcones and coumarins are recognized scaffolds in medicinal chemistry, showing diverse biological and pharmacological properties among which neuroprotective activities and multiple enzyme inhibition, including mitochondrial enzyme systems, stand out. The evaluation of monoamine oxidase B (MAO-B) inhibitors has aroused considerable interest as therapeutic agents for neurodegenerative diseases such as Parkinson's. Of the fourteen chalcocumarins evaluated here against MAO-B, ChC4 showed the strongest activity in vitro, with IC50 = 0.76 ± 0.08 µM. Computational docking, molecular dynamics and MM/GBSA studies, confirm that ChC4 binds very stably to the active rMAO-B site, explaining the experimental inhibition data.
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Affiliation(s)
| | - Osvaldo Yañez
- Center of New Drugs for Hypertension (CENDHY), Santiago 8330015, Chile;
- Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, República 498, Santiago 7550196, Chile
| | - Nicole Morales
- Department of Physiology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago 8331150, Chile;
| | - Angélica González-González
- Laboratorio de Interacciones Insecto-Planta, Instituto de Ciencias Biológicas, Universidad de Talca, Casilla 747, Talca 3460000, Chile;
| | - Carlos Areche
- Department of Chemistry, Faculty of Sciences, Universidad de Chile, Las Palmeras 3425, Nuñoa, Santiago 7800024, Chile;
| | - Marco Tulio Núñez
- Biology Department, Faculty of Sciences, Universidad de Chile, Santiago 7800024, Chile;
| | - Angélica Fierro
- Department of Organic Chemistry, Faculty of Chemistry, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 6094411, Chile
- Correspondence: (A.F.); (O.G.-B.)
| | - Olimpo García-Beltrán
- Centro Integrativo de Biología y Química Aplicada (CIBQA), Universidad Bernardo O’Higgins, General Gana 1702, Santiago 8370854, Chile
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué 730002, Colombia
- Correspondence: (A.F.); (O.G.-B.)
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13
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Yañez O, Osorio MI, Uriarte E, Areche C, Tiznado W, Pérez-Donoso JM, García-Beltrán O, González-Nilo F. In Silico Study of Coumarins and Quinolines Derivatives as Potent Inhibitors of SARS-CoV-2 Main Protease. Front Chem 2021; 8:595097. [PMID: 33614592 PMCID: PMC7893092 DOI: 10.3389/fchem.2020.595097] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Accepted: 12/16/2020] [Indexed: 12/19/2022] Open
Abstract
The pandemic that started in Wuhan (China) in 2019 has caused a large number of deaths, and infected people around the world due to the absence of effective therapy against coronavirus 2 of the severe acute respiratory syndrome (SARS-CoV-2). Viral maturation requires the activity of the main viral protease (Mpro), so its inhibition stops the progress of the disease. To evaluate possible inhibitors, a computational model of the SARS-CoV-2 enzyme Mpro was constructed in complex with 26 synthetic ligands derived from coumarins and quinolines. Analysis of simulations of molecular dynamics and molecular docking of the models show a high affinity for the enzyme (∆E binding between -5.1 and 7.1 kcal mol-1). The six compounds with the highest affinity show K d between 6.26 × 10-6 and 17.2 × 10-6, with binding affinity between -20 and -25 kcal mol-1, with ligand efficiency less than 0.3 associated with possible inhibitory candidates. In addition to the high affinity of these compounds for SARS-CoV-2 Mpro, low toxicity is expected considering the Lipinski, Veber and Pfizer rules. Therefore, this novel study provides candidate inhibitors that would allow experimental studies which can lead to the development of new treatments for SARS-CoV-2.
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Affiliation(s)
- Osvaldo Yañez
- Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Santiago, Chile
- Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
- Center of New Drugs for Hypertension (CENDHY), Santiago, Chile
| | - Manuel Isaías Osorio
- Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
- Facultad de Medicina, Universidad Diego Portales, Santiago, Chile
| | - Eugenio Uriarte
- Departamento Química Orgánica, Facultad de Farmacia, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
- Instituto de Ciencias Químicas Aplicadas, Universidad Autónoma de Chile, Santiago de Chile, Chile
| | - Carlos Areche
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago, Chile
| | - William Tiznado
- Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Santiago, Chile
| | - José M. Pérez-Donoso
- Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Ibagué, Colombia
| | - Fernando González-Nilo
- Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
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14
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Vásquez-Espinal A, Yañez O, Osorio E, Areche C, García-Beltrán O, Ruiz LM, Cassels BK, Tiznado W. Structure–antioxidant activity relationships in boldine and glaucine: a DFT study. NEW J CHEM 2021. [DOI: 10.1039/d0nj04028b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DFT calculations indicate that boldine and glaucine exhibit direct antioxidant activity through the HAT and SPLET (at high pH values) mechanisms.
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Affiliation(s)
- Alejandro Vásquez-Espinal
- Computational and Theoretical Chemistry Group
- Departamento de Ciencias Químicas
- Facultad de Ciencias Exactas
- Universidad Andres Bello
- Santiago
| | - Osvaldo Yañez
- Computational and Theoretical Chemistry Group
- Departamento de Ciencias Químicas
- Facultad de Ciencias Exactas
- Universidad Andres Bello
- Santiago
| | - Edison Osorio
- Facultad de Ciencias Naturales y Matemáticas
- Universidad de Ibagué
- Carrera 22 calle 67
- Ibagué
- Colombia
| | - Carlos Areche
- Departamento de Química
- Facultad de Ciencias
- Universidad de Chile
- Santiago
- Chile
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas
- Universidad de Ibagué
- Carrera 22 calle 67
- Ibagué
- Colombia
| | - Lina M. Ruiz
- Instituto de Ciencias Biomédicas
- Facultad Ciencias de la Salud
- Universidad Autónoma de Chile
- Santiago
- Chile
| | - Bruce K. Cassels
- Departamento de Química
- Facultad de Ciencias
- Universidad de Chile
- Santiago
- Chile
| | - William Tiznado
- Computational and Theoretical Chemistry Group
- Departamento de Ciencias Químicas
- Facultad de Ciencias Exactas
- Universidad Andres Bello
- Santiago
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15
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García-Beltrán O, Areche C, Galdámez A, Moris S. The crystal structure of 1-carboxy-2-(1 H-indol-3-yl)- N, N, N-trimethylethan-1-ammonium chloride, C 14H 19N 2O 2Cl. Z KRIST-NEW CRYST ST 2020. [DOI: 10.1515/ncrs-2020-0240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C14H19N2O2Cl, tetragonal, P41 (no. 76), a = 6.8614(8) Å, c = 29.820(5) Å, V = 1403.9(4) Å3, Z = 4, R
gt(F) = 0.0311, wR
ref(F
2) = 0.0549, T = 150(2) K.
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Affiliation(s)
- Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas , Universidad de Ibagué , Carrera 22 calle 67, Ibagué 730002, Colombia
| | - Carlos Areche
- Universidad de Chile, Facultad de Ciencias, Departamento de Química , Casilla 653, Santiago, Chile
| | - Antonio Galdámez
- Universidad de Chile, Facultad de Ciencias, Departamento de Química , Casilla 653, Santiago, Chile
| | - Silvana Moris
- Universidad Catolíca del Maule, Vicerectoria de Investigacion y Postgrado , Talca , Chile
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Romero N, Areche C, Cubides-Cárdenas J, Escobar N, García-Beltrán O, Simirgiotis MJ, Céspedes Á. In Vitro Anthelmintic Evaluation of Gliricidia sepium, Leucaena leucocephala, and Pithecellobium dulce: Fingerprint Analysis of Extracts by UHPLC-Orbitrap Mass Spectrometry. Molecules 2020; 25:molecules25133002. [PMID: 32630065 PMCID: PMC7412154 DOI: 10.3390/molecules25133002] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 05/17/2020] [Accepted: 05/20/2020] [Indexed: 02/03/2023] Open
Abstract
In the present work, the anthelmintic activity (AA) of ethanolic extracts obtained from Gliricidia sepium, Leucaena leucocephala, and Pithecellobium dulce was evaluated using the third-stage-larval (L3) exsheathment inhibition test (LEIT) and egg hatch test (EHT) on Haemonchus contortus. Extracts were tested at concentrations of 0.3, 0.6, 1.2, 2.5, 5.0, 10, 20, and 40 mg/mL. The larval exsheathment inhibition (LEI) results showed that G. sepium achieved the highest average inhibition of 91.2%, compared with 44.6% for P. dulce and 41.0% for L. leucocephala at a concentration of 40 mg/mL; the corresponding IC50 values were 22.4, 41.7, and 43.3 mg/mL, respectively. The rates of egg hatching inhibition (EHI) at a concentration of 5 mg/mL were 99.5% for G. sepium, 64.2% for P. dulce, and 54% for L. leucocephala; the corresponding IC50 values were 1.9 mg/mL for G. sepium, 3.9 mg/mL for P. dulce, and 4.3 mg/mL for L. leucocephala. The species extracts studied here were also analyzed by ultra-high performance liquid chromatography and Orbitrap high resolution mass spectrometry (UHPLC-Q/Orbitrap/MS/MS), resulting in the compounds' identification associated with AA. Glycosylated flavonoids and methoxyphenols were observed in all three species: fatty acids in G. sepium and P. dulce; phenylpropanoids, anthraquinone glycosides, amino acids and glycosylated phenolic acids in G. sepium; and flavonoids in L. leucocephala. Comparatively, G. sepium presented a greater diversity of compounds potentially active against the control of gastrointestinal nematodes, which was associated with the results obtained in the applied tests.
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Affiliation(s)
- Néstor Romero
- Departamento de Sanidad Animal, Facultad de Medicina Veterinaria y Zootecnia, Universidad del Tolima, Ibagué 730001, Colombia;
- Correspondence:
| | - Carlos Areche
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Nuñoa, Santiago 7800024, Chile;
| | - Jaime Cubides-Cárdenas
- Grupo de Investigación e Innovación en Salud y Bienestar Animal, Laboratorio de Salud Animal, Centro de Investigación Tibaitatá, Agrosavia, Mosquera 250047, Colombia;
| | - Natalia Escobar
- Facultad de Ciencias Agropecuarias, Universidad de Cundinamarca, Fusagasugá 252212, Colombia;
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué 730002, Colombia;
| | | | - Ángel Céspedes
- Departamento de Sanidad Animal, Facultad de Medicina Veterinaria y Zootecnia, Universidad del Tolima, Ibagué 730001, Colombia;
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Salazar C, Yañez O, Elorza AA, Cortes N, García-Beltrán O, Tiznado W, Ruiz LM. Biosystem Analysis of the Hypoxia Inducible Domain Family Member 2A: Implications in Cancer Biology. Genes (Basel) 2020; 11:genes11020206. [PMID: 32085461 PMCID: PMC7074167 DOI: 10.3390/genes11020206] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 02/08/2020] [Accepted: 02/13/2020] [Indexed: 12/14/2022] Open
Abstract
The expression of HIGD2A is dependent on oxygen levels, glucose concentration, and cell cycle progression. This gene encodes for protein HIG2A, found in mitochondria and the nucleus, promoting cell survival in hypoxic conditions. The genomic location of HIGD2A is in chromosome 5q35.2, where several chromosomal abnormalities are related to numerous cancers. The analysis of high definition expression profiles of HIGD2A suggests a role for HIG2A in cancer biology. Accordingly, the research objective was to perform a molecular biosystem analysis of HIGD2A aiming to discover HIG2A implications in cancer biology. For this purpose, public databases such as SWISS-MODEL protein structure homology-modelling server, Catalogue of Somatic Mutations in Cancer (COSMIC), Gene Expression Omnibus (GEO), MethHC: a database of DNA methylation and gene expression in human cancer, and microRNA-target interactions database (miRTarBase) were accessed. We also evaluated, by using Real-Time Quantitative Reverse Transcription Polymerase Chain Reaction (qRT-PCR), the expression of Higd2a gene in healthy bone marrow-liver-spleen tissues of mice after quercetin (50 mg/kg) treatment. Thus, among the structural features of HIG2A protein that may participate in HIG2A translocation to the nucleus are an importin α-dependent nuclear localization signal (NLS), a motif of DNA binding residues and a probable SUMOylating residue. HIGD2A gene is not implicated in cancer via mutation. In addition, DNA methylation and mRNA expression of HIGD2A gene present significant alterations in several cancers; HIGD2A gene showed significant higher expression in Diffuse Large B-cell Lymphoma (DLBCL). Hypoxic tissues characterize the “bone marrow-liver-spleen” DLBCL type. The relative quantification, by using qRT-PCR, showed that Higd2a expression is higher in bone marrow than in the liver or spleen. In addition, it was observed that quercetin modulated the expression of Higd2a gene in mice. As an assembly factor of mitochondrial respirasomes, HIG2A might be unexpectedly involved in the change of cellular energetics happening in cancer. As a result, it is worth continuing to explore the role of HIGD2A in cancer biology.
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Affiliation(s)
- Celia Salazar
- Instituto de Ciencias Biomédicas, Facultad Ciencias de la Salud, Universidad Autónoma de Chile, Santiago 8910060, Chile;
| | - Osvaldo Yañez
- Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Santiago 8370251, Chile; (O.Y.); (W.T.)
| | - Alvaro A. Elorza
- Institute of Biomedical Sciences, Faculty of Medicine and Faculty of Life Sciences, Universidad Andres Bello, Santiago 8370146, Chile;
- Millennium Institute on Immunology and Immunotherapy, Santiago 8331150, Chile
| | - Natalie Cortes
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 calle 67, Ibagué 730002, Colombia; (N.C.); (O.G.-B.)
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 calle 67, Ibagué 730002, Colombia; (N.C.); (O.G.-B.)
| | - William Tiznado
- Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Santiago 8370251, Chile; (O.Y.); (W.T.)
| | - Lina María Ruiz
- Instituto de Ciencias Biomédicas, Facultad Ciencias de la Salud, Universidad Autónoma de Chile, Santiago 8910060, Chile;
- Correspondence: ; Tel.: +56-2-2303-6662
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18
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González-Morales D, Valencia A, Díaz-Nuñez A, Fuentes-Estrada M, López-Santos O, García-Beltrán O. Development of a Low-Cost UV-Vis Spectrophotometer and Its Application for the Detection of Mercuric Ions Assisted by Chemosensors. Sensors (Basel) 2020; 20:s20030906. [PMID: 32046240 PMCID: PMC7038951 DOI: 10.3390/s20030906] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 02/04/2020] [Accepted: 02/05/2020] [Indexed: 12/28/2022]
Abstract
Detection of an environmental contaminant requires the use of expensive measurement equipment, which limits the realization of in situ tests because of their high cost, their limited portability, or the extended time duration of the tests. This paper presents in detail the development of a portable low-cost spectrophotometer which, by using a specialized chemosensor, allows detection of mercuric ions (Hg2+), providing effective and accurate results. Design specifications for all the stages assembling the spectrophotometer and the elements selected to build them are presented along with the process to synthesize the chemosensor and the tests developed to validate its performance in comparison with a high-precision commercial laboratory spectrophotometer.
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Affiliation(s)
- David González-Morales
- Facultad de Ingeniería, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué 730002, Colombia;
| | - Asmilly Valencia
- Facultad de Ingeniería Forestal, Universidad del Tolima, Altos de Santa Helena, Ibagué 730001, Colombia;
| | - Astrid Díaz-Nuñez
- Universidad Nacional de Colombia, Sede Medellín, Escuela de Química, Carrera 65, No. 59A-110, Medellín 050034, Colombia;
| | - Marcial Fuentes-Estrada
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué 730002, Colombia;
| | - Oswaldo López-Santos
- Facultad de Ingeniería, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué 730002, Colombia;
- Correspondence: (O.L.-S.); (O.G.-B.); Tel.: +57-8-2760-010 (O.G.-B.)
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué 730002, Colombia;
- Correspondence: (O.L.-S.); (O.G.-B.); Tel.: +57-8-2760-010 (O.G.-B.)
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19
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Aliaga ME, Gazitua M, Rojas-Bolaños A, Fuentes-Estrada M, Durango D, García-Beltrán O. A selective thioxothiazolidin-coumarin probe for Hg 2+ based on its desulfurization reaction. Exploring its potential for live cell imaging. Spectrochim Acta A Mol Biomol Spectrosc 2020; 224:117372. [PMID: 31344574 DOI: 10.1016/j.saa.2019.117372] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 07/06/2019] [Accepted: 07/07/2019] [Indexed: 06/10/2023]
Abstract
Sensing the most toxic heavy metal (mercury) has attracted a lot of attention in recent years due to its extreme harmfulness to both human health and the environment. Thus, we reported herein the synthesis, spectroscopic and kinetic characterization, and biological evaluation of a new thioxothiazolidin coumarin derivative (ILA92), which undergoes a desulfurization reaction induced by mercuric ions (Hg2+). This process is the origin of a selective sensing of Hg2+ ions in aqueous solution by colorimetric and fluorescent methods. Furthermore, the probe showed great potential for imaging Hg2+ in living cells.
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Affiliation(s)
- Margarita E Aliaga
- Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 6094411, Chile.
| | - Marcela Gazitua
- Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 6094411, Chile
| | - Andrea Rojas-Bolaños
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22, Calle 67, Ibagué 730002, Colombia
| | - Marcial Fuentes-Estrada
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22, Calle 67, Ibagué 730002, Colombia
| | - Diego Durango
- Universidad Nacional de Colombia, Sede Medellín, Escuela de Química, Carrera 65, No. 59A-110, Medellín, Colombia
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22, Calle 67, Ibagué 730002, Colombia.
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20
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Vásquez-Espinal A, Yañez O, Osorio E, Areche C, García-Beltrán O, Ruiz LM, Cassels BK, Tiznado W. Theoretical Study of the Antioxidant Activity of Quercetin Oxidation Products. Front Chem 2019; 7:818. [PMID: 31828060 PMCID: PMC6890856 DOI: 10.3389/fchem.2019.00818] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 11/12/2019] [Indexed: 12/13/2022] Open
Abstract
It was recently shown that, when tested in cellular systems, quercetin oxidized products (Qox) have significantly better antioxidant activity than quercetin (Q) itself. The main Qox identified in the experiments are either 2,5,7,3',4'-pentahydroxy-3,4-flavandione (Fl) or its tautomer, 2-(3,4-dihydroxybenzoyl)-2,4,6-trihydroxy-3(2H)-benzofuranone (Bf). We have now performed a theoretical evaluation of different physicochemical properties using density functional theory (DFT) calculations on Q and its main Qox species. The most stable structures (for Q and Qox) were identified after a structural search on their potential energy surface. Since proton affinities (PAs) are much lower than the bond dissociation enthalpies (BDEs) of phenolic hydrogens, we consider that direct antioxidant activity in these species is mainly due to the sequential proton loss electron transfer (SPLET) mechanism. Moreover, our kinetic studies, according to transition state theory, show that Q is more favored by this mechanism. However, Qox have lower PAs than Q, suggesting that antioxidant activity by the SPLET mechanism should be a result of a balance between proclivity to transfer protons (which favors Qox) and the reaction kinetics of the conjugated base in the sequential electron transfer mechanism (which favors Q). Therefore, our results support the idea that Q is a better direct antioxidant than its oxidized derivatives due to its kinetically favored SPLET reactions. Moreover, our molecular docking calculations indicate a stabilizing interaction between either Q or Qox and the kelch-like ECH-associated protein-1 (Keap1), in the nuclear factor erythroid 2-related factor 2 (Nrf2)-binding site. This should favor the release of the Nrf2 factor, the master regulator of anti-oxidative responses, promoting the expression of the antioxidant responsive element (ARE)-dependent genes. Interestingly, the computed Keap1-metabolite interaction energy is most favored for the Bf compound, which in turn is the most stable oxidized tautomer, according to their computed energies. These results provide further support for the hypothesis that Qox species may be better indirect antioxidants than Q, reducing reactive oxygen species in animal cells by activating endogenous antioxidants.
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Affiliation(s)
- Alejandro Vásquez-Espinal
- Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Santiago, Chile
| | - Osvaldo Yañez
- Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Santiago, Chile
| | - Edison Osorio
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Ibagué, Colombia
| | - Carlos Areche
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago, Chile
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Ibagué, Colombia
| | - Lina María Ruiz
- Facultad Ciencias de la Salud, Instituto de Ciencias Biomédicas, Universidad Autónoma de Chile, Santiago, Chile
| | - Bruce K. Cassels
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago, Chile
| | - William Tiznado
- Computational and Theoretical Chemistry Group, Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andres Bello, Santiago, Chile
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21
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Areche C, Fernandez-Burgos R, Cano T, Simirgiotis M, García-Beltrán O, Borquez J, Sepulveda B. Mulinum crassifolium Phil; Two New Mulinanes, Gastroprotective Activity and Metabolomic Analysis by UHPLC-Orbitrap Mass Spectrometry. Molecules 2019; 24:molecules24091673. [PMID: 31035428 PMCID: PMC6539732 DOI: 10.3390/molecules24091673] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 04/22/2019] [Accepted: 04/26/2019] [Indexed: 01/18/2023] Open
Abstract
Mulinum crassifolium Phil. (Apiaceae) is an endemic shrub from Chile commonly used as infusion in traditional medicine to treat diabetes, bronchial and intestinal disorders and stomach ailments, including ulcers. From the EtOAc extract of this plant, the new mulinane-type diterpenoids 3 and 5 were isolated along with three known diterpenoids. The gastroprotective effect of the infusion of the plant was assayed to support the traditional use and a fast HPLC analysis using high resolution techniques was performed to identify the bioactive constituents. The EtOAc extract and the edible infusion showed gastroprotective effect at 100 mg/kg in the HCl/EtOH induced gastric ulcer model in mice, reducing lesions by 33% and 74%, respectively. Finally, a metabolomic profiling based on UHPLC-ESI-MS/HRMS of the edible infusion was performed and thirty-five compounds were tentatively identified including quercetin, caffeic acid, apigenine glucoside, p-coumaric acid, chlorogenic acids, and caffeoylquinic acids, which have been associated previously with gastroprotective and antiulcer properties. This scientific evidence can support the contribution of polyphenols in the gastroprotective activity of the edible infusion of this plant, and can validate at least in part, its ethnopharmacological use.
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Affiliation(s)
- Carlos Areche
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile.
| | - Ronald Fernandez-Burgos
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile.
- Departamento de Química, Facultad de Ciencias Naturales y Formales, Universidad Nacional de San Agustín, Arequipa 68513, Perú.
| | - Teresa Cano
- Departamento de Química, Facultad de Ciencias Naturales y Formales, Universidad Nacional de San Agustín, Arequipa 68513, Perú.
| | - Mario Simirgiotis
- Instituto de Farmacia, Facultad de Ciencias, Universidad Austral de Chile, Valdivia 5090000, Chile.
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 calle 67, Ibagué 730002, Colombia.
| | - Jorge Borquez
- Departamento de Química, Facultad de Ciencias Básicas, Universidad de Antofagasta, Av Coloso S-N, Antofagasta 1240000, Chile.
| | - Beatriz Sepulveda
- Departamento de Ciencias Químicas, Universidad Andrés Bello, Campus Viña del Mar, Quillota 980, Viña del Mar, Chile.
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22
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Giraldo C, Ferraro F, Hadad CZ, García-Beltrán O, Osorio E. Structural, thermodynamic and kinetic factors in the desorption/absorption of a hydrogen molecule in the M 3AlH 10−xNa (M = Be or Mg; x = 0 or 2) hydrides. NEW J CHEM 2019. [DOI: 10.1039/c9nj02326g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the context of the design and study of new materials for hydrogen storage, the thermodynamic and kinetic-mechanistic factors for the desorption/absorption of a hydrogen molecule in the M3AlH10−xNa (M = Be or Mg; x = 0 or 2) hydrides are evaluated.
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Affiliation(s)
| | - Franklin Ferraro
- Departamento de Ciencias Básicas
- Universidad Católica Luis Amigó
- SISCO
- Medellín
- Colombia
| | - C. Z. Hadad
- Instituto de Química
- Universidad de Antioquia
- Medellín
- Colombia
| | | | - Edison Osorio
- Facultad de Ciencias Naturales y Matemáticas
- Universidad de Ibagué
- Ibagué
- Colombia
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23
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Arancibia V, Penagos-Llanos J, Nagles E, García-Beltrán O, Hurtado JJ. Development of a microcomposite with single-walled carbon nanotubes and Nd 2O 3 for determination of paracetamol in pharmaceutical dosage by adsorptive voltammetry. J Pharm Anal 2018; 9:62-69. [PMID: 30740259 PMCID: PMC6355469 DOI: 10.1016/j.jpha.2018.11.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 11/20/2018] [Accepted: 11/21/2018] [Indexed: 11/02/2022] Open
Abstract
This study presents for the first time a new composite of carbon paste (CP), single-walled carbon nanotubes (SWCNTs) and Nd2O3 (NdOX). This versatile composite (NdOX-SWCNT/CPE) was applied to the oxidation of paracetamol (PCM). The newly formed surface was characterized by scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The results showed greater conductivity and a higher surface area for the composite than those of the carbon paste alone. Moreover, the anodic peak currents for PCM increased from 1.6 to 3.6 µA with CPE and NdOX-SWCNT/CPE, indicating an increase of nearly 51.0% for the anodic peak current. On the other hand, the anodic peak potentials shifted from 0.67 to 0.57 V. The detection limits were 0.05 µmol/L with NdOX-SWCNT/CPE and 0.50 µmol/L with SWCNT/CPE. The relative standard deviations (RSDs) were 1.5% (n = 7). The accuracy and interference of the methods were evaluated with a urine chemistry control spiked with known quantities of PCM, uric acid, dopamine, ascorbic acid, caffeine, acetylsalicylic acid, tartrazine, sunset yellow, allure red, rutin, morin and metal ions. Finally, the novelty and usefulness of the composite were evaluated to quantify PCM in pharmaceutical dosage forms such as tablets, powders and syrups for children.
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Affiliation(s)
- Verónica Arancibia
- Pontificia Universidad Católica de Chile, Facultad de Química, Vicuña Mackenna 4860, Santiago 7820436, Chile
| | - Johisner Penagos-Llanos
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, 730001 Ibagué, Colombia
| | - Edgar Nagles
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, 730001 Ibagué, Colombia
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, 730001 Ibagué, Colombia
| | - John J Hurtado
- Departamento de Química, Universidad de los Andes, Carrera 1 No. 18A-12, Bogotá, Colombia
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24
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Nagles E, García-Beltrán O. Determination of Allura Red in the Presence of Cetylpyridinium Bromide by Square-wave Adsorptive Stripping Voltammetry on a Glassy Carbon Electrode. ANAL SCI 2018; 34:1171-1175. [PMID: 30305594 DOI: 10.2116/analsci.17p555] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A simple method to determine Allura Red (AR) in cherry gelatin, chili sauce and strawberry juice by square-wave adsorptive stripping voltammetry (SWAdV) in the presence of cetylpyridinium bromide (CPB) is reported. Using a glassy carbon electrode (GCE), Amaranth (AM), Ponceau 4R (P-4R) and AR were oxidized to very close potential values in medium acid pH 3.0 with phosphate buffer solution (PBS), making selective AR detection impossible. Under these conditions AM, P-4R and AR were oxidized at 0.80, 0.77 and 0.81 V, respectively. When small amounts of CPB were added, an AR-CPB aggregate was formed. This change displaced the oxidation almost 0.14 V in the direction of the most positive potential and increased the current almost 50%, while AM and P-4R were oxidized at almost the same potential. Under these conditions, the selective determination of AR in food was possible. Detection limit was 0.032 μmol L-1. Finally, the method was successfully applied to the determination of AR in these foods.
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Affiliation(s)
- Edgar Nagles
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué
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25
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Marquez-Mariño K, Penagos-Llanos J, García-Beltrán O, Nagles E, Hurtado JJ. Development of a Novel Electrochemical Sensor Based on a Carbon Paste Electrode Decorated with Nd2
O3
for the Simultaneous Detection of Tartrazine and Sunset Yellow. ELECTROANAL 2018. [DOI: 10.1002/elan.201800550] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Karen Marquez-Mariño
- Facultad de Ciencias Básicas; Universidad de la Amazonia; Calle 17 Diagonal 17 Florencia Colombia
| | - Johisner Penagos-Llanos
- Facultad de Ciencias Básicas; Universidad de la Amazonia; Calle 17 Diagonal 17 Florencia Colombia
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas; Universidad de Ibagué; Carrera 22 Calle 67 730001 Ibagué
| | - Edgar Nagles
- Facultad de Ciencias Naturales y Matemáticas; Universidad de Ibagué; Carrera 22 Calle 67 730001 Ibagué
| | - John J. Hurtado
- Departamento de Química; Universidad de los Andes; Carrera 1 No. 18 A-12 Bogotá Colombia
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26
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Nuñez-Dallos N, Macías MA, García-Beltrán O, Calderón JA, Nagles E, Hurtado J. Voltammetric determination of amaranth and tartrazine with a new double-stranded copper(I) helicate-single-walled carbon nanotube modified screen printed electrode. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.05.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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27
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Jiménez-González A, Quispe C, Bórquez J, Sepúlveda B, Riveros F, Areche C, Nagles E, García-Beltrán O, Simirgiotis MJ. UHPLC-ESI-ORBITRAP-MS analysis of the native Mapuche medicinal plant palo negro (Leptocarpha rivularis DC. - Asteraceae) and evaluation of its antioxidant and cholinesterase inhibitory properties. J Enzyme Inhib Med Chem 2018; 33:936-944. [PMID: 29734888 PMCID: PMC6009940 DOI: 10.1080/14756366.2018.1466880] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
UHPLC/ESI/MS identification of organic compounds is the first step in the majority of screening techniques for the characterization of biologically active metabolites in natural sources. This paper describes a method for the fast identification and characterisation of secondary metabolites in Leptocarpha rivularis DC. (Palo negro) extracts by HPLC/UV (DAD)–Mass Spectrometry (HPLC/MS). The plant is used for the treatment of several diseases since pre-hispanic Mapuche times. Thirty-seven compounds were detected in the aqueous edible extract for the first time including 4 sesquiterpenes, 10 flavonoids, 9 oxylipins, 2 organic acids, and 11 phenolic acids. In addition, phenolic content antioxidant and cholinesterase inhibitory activities were measured for the first time using the edible infusion. The total polyphenol content of the infusion was 230.76 ± 2.5 mmol GAE/kg dry weight, while the antioxidant activity was 176.51 ± 28.84; 195.28 ± 4.83; and 223.92 ± 2.95 mmol TE/kg dry weight, for the DPPH, ABTS, and FRAP assays, respectively. The cholinesterase inhibitory activity was 7.38 ± 0.03 and 5.74 ± 0.06 mmol GALAE/kg, for the inhibition of acetylcholinesterase AChE and BChE, respectively, showing that this plant is a candidate for the isolation of compounds that can be useful for the treatment of neurodegenerative diseases. Furthermore, this plant could serve also as a raw material for the production of dietary supplements, due to its content of polyphenolic compounds.
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Affiliation(s)
| | - Cristina Quispe
- b Instituto de Etnofarmacología , Universidad Arturo Prat, Facultad de Ciencias de la Salud , Iquique , Chile
| | - Jorge Bórquez
- c Laboratorio de Productos Naturales, Departamento de Química , Facultad de Ciencias Básicas, Universidad de Antofagasta , Antofagasta , Chile
| | - Beatriz Sepúlveda
- d Departamento de Ciencias Químicas , Universidad Andres Bello , Viña del Mar , Chile
| | - Felipe Riveros
- c Laboratorio de Productos Naturales, Departamento de Química , Facultad de Ciencias Básicas, Universidad de Antofagasta , Antofagasta , Chile
| | - Carlos Areche
- e Departamento de Química, Facultad de Ciencias , Universidad de Chile , Santiago , Chile
| | - Edgar Nagles
- a Facultad de Ciencias Naturales y Matemáticas , Universidad de Ibagué , Iquique , Colombia
| | - Olimpo García-Beltrán
- a Facultad de Ciencias Naturales y Matemáticas , Universidad de Ibagué , Iquique , Colombia
| | - Mario J Simirgiotis
- f Instituto de Farmacia, Facultad de Ciencias , Universidad Austral de Chile , Valdivia , Chile.,g Center for Interdisciplinary Studies on the Nervous System , Universidad Austral de Chile , Valdivia , Chile
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28
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Nagles E, Penagos-Llanos J, García-Beltrán O, Hurtado J. Determination of Rutin in Drinks Using an Electrode Modified with Carbon Nanotubes-Prussian Blue. J Anal Chem 2018. [DOI: 10.1134/s1061934818050064] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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29
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Gómez M, Aliaga ME, Arancibia V, Moya A, Segura C, Nuñez MT, Aguirre P, Nagles E, García-Beltrán O. Detection of SO2 derivatives using a new chalco-coumarin derivative in cationic micellar media: application to real samples. RSC Adv 2018; 8:31261-31266. [PMID: 35548216 PMCID: PMC9085600 DOI: 10.1039/c8ra04526g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 08/26/2018] [Indexed: 11/21/2022] Open
Abstract
A new probe ChC16 was synthesized and studied as a turn-on fluorescent probe, based on a Michael addition mechanism for sensing SO2 derivatives, which is favored in the presence of cationic micellar media such as cetylpyridinium bromide (CPB).
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Affiliation(s)
- Marisol Gómez
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
- Escuela de Obstetricia y Puericultura and Centro Integrativo de Biología y Química Aplicada (CIBQA)
| | | | - Verónica Arancibia
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | - Alexis Moya
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Santiago
- Chile
| | - Camilo Segura
- Department of Chemistry
- Faculty of Sciences
- Universidad de Chile
- Santiago 7800024
- Chile
| | - Marco T. Nuñez
- Biology Department
- Faculty of Sciences
- Universidad de Chile
- Santiago 7800024
- Chile
| | - Pabla Aguirre
- Biology Department
- Faculty of Sciences
- Universidad de Chile
- Santiago 7800024
- Chile
| | - Edgar Nagles
- Facultad de Ciencias Naturales y Matemáticas
- Universidad de Ibagué
- Ibagué 730001
- Colombia
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas
- Universidad de Ibagué
- Ibagué 730001
- Colombia
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30
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Salgado F, Albornoz L, Cortéz C, Stashenko E, Urrea-Vallejo K, Nagles E, Galicia-Virviescas C, Cornejo A, Ardiles A, Simirgiotis M, García-Beltrán O, Areche C. Secondary Metabolite Profiling of Species of the Genus Usnea by UHPLC-ESI-OT-MS-MS. Molecules 2017; 23:molecules23010054. [PMID: 29280946 PMCID: PMC6017147 DOI: 10.3390/molecules23010054] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 12/20/2017] [Accepted: 12/24/2017] [Indexed: 12/02/2022] Open
Abstract
Lichens are symbiotic associations of fungi with microalgae and/or cyanobacteria, which are considered among the slowest growing organisms, with strong tolerance to adverse environmental conditions. There are about 400 genera and 1600 species of lichens and those belonging to the Usnea genus comprise about 360 of these species. Usnea lichens have been used since ancient times as dyes, cosmetics, preservatives, deodorants and folk medicines. The phytochemistry of the Usnea genus includes more than 60 compounds which belong to the following classes: depsides, depsidones, depsones, lactones, quinones, phenolics, polysaccharides, fatty acids and dibenzofurans. Due to scarce knowledge of metabolomic profiles of Usnea species (U. barbata, U. antarctica, U. rubicunda and U. subfloridana), a study based on UHPLC-ESI-OT-MS-MS was performed for a comprehensive characterization of their secondary metabolites. From the methanolic extracts of these species a total of 73 metabolites were identified for the first time using this hyphenated technique, including 34 compounds in U. barbata, 21 in U. antarctica, 38 in U. rubicunda and 37 in U. subfloridana. Besides, a total of 13 metabolites were not identified and reported so far, and could be new according to our data analysis. This study showed that this hyphenated technique is rapid, effective and accurate for phytochemical identification of lichen metabolites and the data collected could be useful for chemotaxonomic studies.
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Affiliation(s)
- Francisco Salgado
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Nuñoa, Santiago 7800024, Chile.
| | - Laura Albornoz
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Nuñoa, Santiago 7800024, Chile.
| | - Carmen Cortéz
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Nuñoa, Santiago 7800024, Chile.
| | - Elena Stashenko
- Research Center of Excellence CENIVAM, CIBIMOL, Universidad Industrial de Santander, Building 45, UIS, Carrera 27, Calle 9, Bucaramanga 680002, Colombia.
| | - Kelly Urrea-Vallejo
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué 730001, Colombia.
| | - Edgar Nagles
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Nuñoa, Santiago 7800024, Chile.
| | - Cesar Galicia-Virviescas
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Nuñoa, Santiago 7800024, Chile.
| | - Alberto Cornejo
- Escuela de Tecnología Médica, Facultad de Medicina, Universidad Andrés Bello, Sazié 2315, Santiago 8370092, Chile.
| | - Alejandro Ardiles
- Facultad de Ciencias de la Salud, Universidad Arturo Prat, Casilla 121, Iquique 1100000, Chile.
| | - Mario Simirgiotis
- Instituto de Farmacia, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja, Valdivia 5090000, Chile.
- Center for Interdisciplinary Studies on the Nervous System, Universidad Austral de Chile, Campus Isla Teja, Valdivia 5090000, Chile.
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué 730001, Colombia.
| | - Carlos Areche
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Nuñoa, Santiago 7800024, Chile.
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García-Beltrán O, Mena NP, Aguirre P, Barriga-González G, Galdámez A, Nagles E, Adasme T, Hidalgo C, Núñez MT. Development of an iron-selective antioxidant probe with protective effects on neuronal function. PLoS One 2017; 12:e0189043. [PMID: 29228015 PMCID: PMC5724820 DOI: 10.1371/journal.pone.0189043] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 11/19/2017] [Indexed: 12/19/2022] Open
Abstract
Iron accumulation, oxidative stress and calcium signaling dysregulation are common pathognomonic signs of several neurodegenerative diseases, including Parkinson´s and Alzheimer’s diseases, Friedreich ataxia and Huntington’s disease. Given their therapeutic potential, the identification of multifunctional compounds that suppress these damaging features is highly desirable. Here, we report the synthesis and characterization of N-(1,3-dihydroxy-2-(hydroxymethyl)propan-2-yl)-2-(7-hydroxy-2-oxo-2H-chromen-4-yl)acetamide, named CT51, which exhibited potent free radical neutralizing activity both in vitro and in cells. CT51 bound Fe2+ with high selectivity and Fe3+ with somewhat lower affinity. Cyclic voltammetric analysis revealed irreversible binding of Fe3+ to CT51, an important finding since stopping Fe2+/Fe3+ cycling in cells should prevent hydroxyl radical production resulting from the Fenton-Haber-Weiss cycle. When added to human neuroblastoma cells, CT51 freely permeated the cell membrane and distributed to both mitochondria and cytoplasm. Intracellularly, CT51 bound iron reversibly and protected against lipid peroxidation. Treatment of primary hippocampal neurons with CT51 reduced the sustained calcium release induced by an agonist of ryanodine receptor-calcium channels. These protective properties of CT51 on cellular function highlight its possible therapeutic use in diseases with significant oxidative, iron and calcium dysregulation.
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Affiliation(s)
- Olimpo García-Beltrán
- Biomedical Neuroscience Institute (BNI), Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Natalia P. Mena
- Department of Biology, Faculty of Sciences, Universidad de Chile, Santiago, Chile
| | - Pabla Aguirre
- Department of Biology, Faculty of Sciences, Universidad de Chile, Santiago, Chile
| | - Germán Barriga-González
- Universidad Metropolitana de Ciencias de la Educación, Facultad de Ciencias Básicas, Departamento de Química, Santiago, Chile
| | - Antonio Galdámez
- Department of Chemistry, Faculty of Sciences, University of Chile, Santiago, Chile
| | - Edgar Nagles
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Ibagué, Colombia
| | - Tatiana Adasme
- Biomedical Neuroscience Institute (BNI), Faculty of Medicine, Universidad de Chile, Santiago, Chile
- Integrative Center for Applied Biology and Chemistry (CIBQA), Universidad Bernardo O’Higgins, Santiago, Chile
| | - Cecilia Hidalgo
- Biomedical Neuroscience Institute (BNI), Faculty of Medicine, Universidad de Chile, Santiago, Chile
- Department of Neuroscience, CEMC and ICBM, Faculty of Medicine, Universidad de Chile, Santiago, Chile
- * E-mail: (CH); (MTN)
| | - Marco T. Núñez
- Department of Biology, Faculty of Sciences, Universidad de Chile, Santiago, Chile
- * E-mail: (CH); (MTN)
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Nagles E, García-Beltrán O, Calderón JA. Evaluation of the usefulness of a novel electrochemical sensor in detecting uric acid and dopamine in the presence of ascorbic acid using a screen-printed carbon electrode modified with single walled carbon nanotubes and ionic liquids. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.11.093] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Aguirre P, García-Beltrán O, Tapia V, Muñoz Y, Cassels BK, Núñez MT. Neuroprotective Effect of a New 7,8-Dihydroxycoumarin-Based Fe 2+/Cu 2+ Chelator in Cell and Animal Models of Parkinson's Disease. ACS Chem Neurosci 2017; 8:178-185. [PMID: 27806193 DOI: 10.1021/acschemneuro.6b00309] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Disturbed iron homeostasis, often coupled to mitochondrial dysfunction, plays an important role in the progression of common neurodegenerative diseases such as Parkinson's disease (PD). Recent studies have underlined the relevance of iron chelation therapy for the treatment of these diseases. Here we describe the synthesis, chemical, and biological characterization of the multifunctional chelator 7,8-dihydroxy-4-((methylamino)methyl)-2H-chromen-2-one (DHC12). Metal selectivity of DHC12 was Cu2+ ∼ Fe2+ > Zn2+ > Fe3+. No binding capacity was detected for Hg2+, Co2+, Ca2+, Mn2+, Mg2+, Ni2+, Pb2+, or Cd2+. DHC12 accessed cells colocalizing with Mitotracker Orange, an indication of mitochondrial targeting. In addition, DHC12 chelated mitochondrial and cytoplasmic labile iron. Upon mitochondrial complex I inhibition, DHC12 protected plasma membrane and mitochondria against lipid peroxidation, as detected by the reduced formation of 4-hydroxynonenal adducts and oxidation of C11-BODIPY581/591. DHC12 also blocked the decrease in mitochondrial membrane potential, detected by tetramethylrhodamine distribution. DHC12 inhibited MAO-A and MAO-B activity. Oral administration of DHC12 to mice (0.25 mg/kg body weight) protected substantia nigra pars compacta (SNpc) neurons against MPTP-induced death. Taken together, our results support the concept that DHC12 is a mitochondrial-targeted neuroprotective iron-copper chelator and MAO-B inhibitor with potent antioxidant and mitochondria protective activities. Oral administration of low doses of DHC12 is a promising therapeutic strategy for the treatment of diseases with a mitochondrial iron accumulation component, such as PD.
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Affiliation(s)
- Pabla Aguirre
- Biology
Department, Faculty of Sciences, Universidad de Chile, Santiago 7800024, Chile
| | - Olimpo García-Beltrán
- Facultad
de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Ibagué 730001, Colombia
| | - Victoria Tapia
- Biology
Department, Faculty of Sciences, Universidad de Chile, Santiago 7800024, Chile
| | - Yorka Muñoz
- Biology
Department, Faculty of Sciences, Universidad de Chile, Santiago 7800024, Chile
| | - Bruce K. Cassels
- Department
of Chemistry, Faculty of Sciences, Universidad de Chile, Santiago 7800024, Chile
| | - Marco T. Núñez
- Biology
Department, Faculty of Sciences, Universidad de Chile, Santiago 7800024, Chile
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Nagles E, Calderón JA, García-Beltrán O. Development of an Electrochemical Sensor to Detect Dopamine and Ascorbic Acid Based on Neodymium (III) Oxide and Chitosan. ELECTROANAL 2016. [DOI: 10.1002/elan.201600729] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Edgar Nagles
- Facultad de Ciencias Naturales y Matemáticas; Universidad de Ibagué; Carrera 22 Calle 67 Ibagué 730001 Colombia
| | - Jorge A. Calderón
- Centro de Investigación; Innovación y Desarrollo de Materiales - CIDEMAT; Universidad de Antioquia - UdeA; Calle 70 No. 52-21 Medellín Colombia
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas; Universidad de Ibagué; Carrera 22 Calle 67 Ibagué 730001 Colombia
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Sepúlveda B, Quispe C, Simirgiotis M, García-Beltrán O, Areche C. Gastroprotective effects of new diterpenoid derivatives from Azorella cuatrecasasii Mathias & Constance obtained using a β-cyclodextrin complex with microbial and chemical transformations. Bioorg Med Chem Lett 2016; 26:3220-3222. [PMID: 27262597 DOI: 10.1016/j.bmcl.2016.05.081] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 05/25/2016] [Accepted: 05/27/2016] [Indexed: 11/29/2022]
Abstract
Mulinane diterpenoids isolated from Azorella species have displayed gastroprotective effects in animal models. In this study we have transformed the main constituent, mulin-11,13-dien-20 oic acid from this plant using the filamentous fungus Mucor plumbeus and a β-cyclodextrin inclusion complex and we have obtained two main products with good yields (33% and 15% for compound 4 and 5, respectively) for further preparation of semisynthetic derivatives to evaluate their gastroprotective effects. In addition, one of the compounds isolated from Azorella cuatrecasasii was new (9-epi-13α-hydroxymulinene 1). Six new derivatives 4a-4c and 5a-5c were then prepared by simple chemical transformations. The structures of all compounds were elucidated by spectroscopic means based on 1D and 2D-NMR techniques. Some 8 diterpenes were evaluated for their gastroprotective effects in the ethanol/HCl-induced ulcer model in mice at 20mg/kg. The highest gastroprotective activity was shown by 7α,16-dihydroxymulin-11,13-dien-20-oic acid 5, which was higher than the reference drug lansoprazole, while 16-hydroxymulin-11,13-dien-20-oic acid 4 was as active as lansoprazole.
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Affiliation(s)
- Beatriz Sepúlveda
- Departmento de Química, Universidad Andrés Bello, Viña del Mar, Chile
| | - Cristina Quispe
- Facultad de Ciencias de la Salud, Universidad Arturo Prat, Iquique, Chile
| | - Mario Simirgiotis
- Laboratorio de Productos Naturales, Departamento de Química, Facultad de Ciencias Básicas, Universidad de Antofagasta, Antofagasta, Chile
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué 730001, Colombia.
| | - Carlos Areche
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago, Chile.
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Mena NP, García-Beltrán O, Lourido F, Urrutia PJ, Mena R, Castro-Castillo V, Cassels BK, Núñez MT. Corrigendum to "The novel mitochondrial iron chelator 5-((methylamino)methyl)-8-hydroxyquinoline protects against mitochondrial-induced oxidative damage and neuronal death" [Biochem. Biophys. Res. Commun. 463 (4) (2015) 787-792]. Biochem Biophys Res Commun 2016; 473:361. [PMID: 27087027 DOI: 10.1016/j.bbrc.2016.03.070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- Natalia P Mena
- Iron and Biology of Aging Laboratory, Department of Biology, Faculty of Sciences, University of Chile, Chile.
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Ibagué, 730001, Colombia
| | - Fernanda Lourido
- Iron and Biology of Aging Laboratory, Department of Biology, Faculty of Sciences, University of Chile, Chile
| | - Pamela J Urrutia
- Iron and Biology of Aging Laboratory, Department of Biology, Faculty of Sciences, University of Chile, Chile
| | - Raúl Mena
- Iron and Biology of Aging Laboratory, Department of Biology, Faculty of Sciences, University of Chile, Chile
| | - Vicente Castro-Castillo
- Faculty of Basic Sciences, Universidad Metropolitana de Ciencias de la Educación, Santiago, Chile
| | - Bruce K Cassels
- Department of Chemistry, Faculty of Sciences, University of Chile, Santiago, Chile
| | - Marco T Núñez
- Iron and Biology of Aging Laboratory, Department of Biology, Faculty of Sciences, University of Chile, Chile
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Aguirre P, Mena NP, Carrasco CM, Muñoz Y, Pérez-Henríquez P, Morales RA, Cassels BK, Méndez-Gálvez C, García-Beltrán O, González-Billault C, Núñez MT. Iron Chelators and Antioxidants Regenerate Neuritic Tree and Nigrostriatal Fibers of MPP+/MPTP-Lesioned Dopaminergic Neurons. PLoS One 2015; 10:e0144848. [PMID: 26658949 PMCID: PMC4684383 DOI: 10.1371/journal.pone.0144848] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 11/24/2015] [Indexed: 01/08/2023] Open
Abstract
Neuronal death in Parkinson’s disease (PD) is often preceded by axodendritic tree retraction and loss of neuronal functionality. The presence of non-functional but live neurons opens therapeutic possibilities to recover functionality before clinical symptoms develop. Considering that iron accumulation and oxidative damage are conditions commonly found in PD, we tested the possible neuritogenic effects of iron chelators and antioxidant agents. We used three commercial chelators: DFO, deferiprone and 2.2’-dypyridyl, and three 8-hydroxyquinoline-based iron chelators: M30, 7MH and 7DH, and we evaluated their effects in vitro using a mesencephalic cell culture treated with the Parkinsonian toxin MPP+ and in vivo using the MPTP mouse model. All chelators tested promoted the emergence of new tyrosine hydroxylase (TH)-positive processes, increased axodendritic tree length and protected cells against lipoperoxidation. Chelator treatment resulted in the generation of processes containing the presynaptic marker synaptophysin. The antioxidants N-acetylcysteine and dymetylthiourea also enhanced axodendritic tree recovery in vitro, an indication that reducing oxidative tone fosters neuritogenesis in MPP+-damaged neurons. Oral administration to mice of the M30 chelator for 14 days after MPTP treatment resulted in increased TH- and GIRK2-positive nigra cells and nigrostriatal fibers. Our results support a role for oral iron chelators as good candidates for the early treatment of PD, at stages of the disease where there is axodendritic tree retraction without neuronal death.
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Affiliation(s)
- Pabla Aguirre
- Iron and Biology of Aging Laboratory, Biology Department, Faculty of Sciences, Universidad de Chile, Santiago, Chile
- Research Ring on Oxidative Stress in the Nervous System, Santiago, Chile
| | - Natalia P. Mena
- Iron and Biology of Aging Laboratory, Biology Department, Faculty of Sciences, Universidad de Chile, Santiago, Chile
| | - Carlos M. Carrasco
- Iron and Biology of Aging Laboratory, Biology Department, Faculty of Sciences, Universidad de Chile, Santiago, Chile
- Research Ring on Oxidative Stress in the Nervous System, Santiago, Chile
| | - Yorka Muñoz
- Iron and Biology of Aging Laboratory, Biology Department, Faculty of Sciences, Universidad de Chile, Santiago, Chile
- Research Ring on Oxidative Stress in the Nervous System, Santiago, Chile
| | - Patricio Pérez-Henríquez
- Iron and Biology of Aging Laboratory, Biology Department, Faculty of Sciences, Universidad de Chile, Santiago, Chile
| | - Rodrigo A. Morales
- Iron and Biology of Aging Laboratory, Biology Department, Faculty of Sciences, Universidad de Chile, Santiago, Chile
| | - Bruce K. Cassels
- Chemobiodynamics Laboratory, Chemistry Department, Faculty of Sciences, Universidad de Chile, Santiago, Chile
| | - Carolina Méndez-Gálvez
- Chemobiodynamics Laboratory, Chemistry Department, Faculty of Sciences, Universidad de Chile, Santiago, Chile
| | - Olimpo García-Beltrán
- Chemobiodynamics Laboratory, Chemistry Department, Faculty of Sciences, Universidad de Chile, Santiago, Chile
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Ibagué, Colombia
| | - Christian González-Billault
- Research Ring on Oxidative Stress in the Nervous System, Santiago, Chile
- Neuronal and Cellular Dynamics Laboratory, Biology Department, Faculty of Sciences, Universidad de Chile, Santiago, Chile
| | - Marco T. Núñez
- Iron and Biology of Aging Laboratory, Biology Department, Faculty of Sciences, Universidad de Chile, Santiago, Chile
- Research Ring on Oxidative Stress in the Nervous System, Santiago, Chile
- * E-mail:
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García-Beltrán O, Rodríguez A, Trujillo A, Cañete A, Aguirre P, Gallego-Quintero S, Nuñez MT, Aliaga ME. Synthesis and characterization of a novel fluorescent and colorimetric probe for the detection of mercury (II) even in the presence of relevant biothiols. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.09.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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García-Beltrán O, Santos JG, Fuentealba S, De la Torre P, Pavez P, Mena N, Nuñez MT, Aliaga ME. Mechanism study of the thiol-addition reaction to benzothiazole derivative for sensing endogenous thiols. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.03.083] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Areche C, Benites J, Cornejo A, Ruiz LM, García-Beltrán O, Simirgiotis MJ, Sepúlveda B. Seco-taondiol, an unusual meroterpenoid from the Chilean seaweed Stypopodium flabelliforme and its gastroprotective effect in mouse model. Mar Drugs 2015; 13:1726-38. [PMID: 25830679 PMCID: PMC4413184 DOI: 10.3390/md13041726] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Revised: 03/01/2015] [Accepted: 03/20/2015] [Indexed: 11/16/2022] Open
Abstract
Ten known meroterpenoids and the new meroterpenoid 7 were isolated from the Chilean seaweed Stypopodium flabelliforme as their acetylated derivatives. Furthermore, the known metabolite taondiol has been isolated for the first time from this species. The molecular structure of the new metabolite was determined by spectroscopic methods based on 1D- and 2D-NMR. Isolation of 7 represents a key step toward a better understanding of the biogenesis of this class of meroterpenoids. Among the meroditerpenoids isolated, stypodiol, isoepitaondiol, epitaondiol and sargaol exhibited gastroprotective activity on the HCl/Ethanol-induced gastric lesions model in mice. Regarding the mode of gastroprotective action, the activity of epitaondiol was reversed significantly when animals were pretreated with indomethacin, N-ethylmaleimide and N-nitro-l-arginine methyl ester (L-NAME) suggesting that prostaglandins, sulfhydryl groups and nitric oxide are involved in their mode of gastroprotective action. In the case of sargaol the gastroprotective activity was attenuated with indomethacin and N-ethylmaleimide, which suggests that prostaglandins and sulfhydryl groups are also involved in the mode of action using this model.
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Affiliation(s)
- Carlos Areche
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago 8320000, Chile.
| | - Julio Benites
- Facultad de Ciencias de la Salud, Universidad Arturo Prat, Casilla 121, Iquique 1100000, Chile.
| | - Alberto Cornejo
- Escuela de Tecnología Médica, Facultad de Medicina, Universidad Andrés Bello, Santiago 8370186, Chile.
| | - Lina M Ruiz
- Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Santiago 8910132, Chile.
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué 730001, Colombia.
| | - Mario J Simirgiotis
- Laboratorio de Productos Naturales, Departamento de Química, Facultad de Ciencias Básicas, Universidad de Antofagasta, Antofagasta 1240000, Chile.
| | - Beatriz Sepúlveda
- Departmento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andrés Bello, Quillota 980, Viña del Mar 2520000, Chile.
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Aliaga ME, García-Río L, Pessêgo M, Montecinos R, Fuentealba D, Uribe I, Martín-Pastor M, García-Beltrán O. Host–guest interaction of coumarin-derivative dyes and cucurbit[7]uril: leading to the formation of supramolecular ternary complexes with mercuric ions. NEW J CHEM 2015. [DOI: 10.1039/c5nj00162e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The interaction between the studied coumarin derivatives-cucurbit[7]uril complexes and mercuric ions displays a positive cooperative effect relative to the dyes alone.
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Affiliation(s)
| | - Luis García-Río
- Departamento de Química Física
- Centro de Investigación en Química Biológica y Materiales Moleculares (CIQUS)
- Universidad de Santiago
- 15782 Santiago
- Spain
| | - Márcia Pessêgo
- Departamento de Química Física
- Centro de Investigación en Química Biológica y Materiales Moleculares (CIQUS)
- Universidad de Santiago
- 15782 Santiago
- Spain
| | - Rodrigo Montecinos
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Casilla 306
- Chile
| | - Denis Fuentealba
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Casilla 306
- Chile
| | - Iván Uribe
- Facultad de Química
- Pontificia Universidad Católica de Chile
- Casilla 306
- Chile
| | - Manuel Martín-Pastor
- Unidade de Resonancia Magnética
- RIAIDT
- Edif. CACTUS
- Universidad de Santiago
- 15782 Santiago
| | - Olimpo García-Beltrán
- Facultad de Ciencias Naturales y Matemáticas
- Universidad de Ibagué
- Carrera 22 Calle 67
- Colombia
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García-Beltrán O, Yañez O, Caballero J, Galdámez A, Mena N, Nuñez MT, Cassels BK. Synthesis of coumarin derivatives as fluorescent probes for membrane and cell dynamics studies. Eur J Med Chem 2014; 76:79-86. [PMID: 24576613 DOI: 10.1016/j.ejmech.2014.02.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Revised: 11/13/2013] [Accepted: 02/08/2014] [Indexed: 01/07/2023]
Abstract
Three coumarin-derived fluorescent probes, 3-acetyl-7-[(6-bromohexyl)oxy]-2H-chromen-2-one (FM1), 7-[(6-bromohexyl)oxy]-4-methyl-2H-chromen-2-one (FM2) and ethyl 2-{7-[(6-bromohexyl)oxy]-2-oxo-2H-chromen-4-yl}acetate (FM3), are described, with their photophysical constants. The compounds were tested in preliminary studies employing epifluorescence microscopy demonstrating that they allow the imaging of human neuroblastoma SH-SY5Y cell membranes. The structure of FM3 was confirmed by X-ray crystallographic analysis. Molecular dynamics (MD) simulations were used to characterize the localization and interactions of the studied compounds with a lipid bilayer model of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC).
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Affiliation(s)
- Olimpo García-Beltrán
- Department of Chemistry, Faculty of Sciences, University of Chile, Santiago, Chile; Facultad de Ciencias Naturales y Matemáticas, Universidad de Ibagué, Carrera 22 Calle 67, Ibagué, Colombia.
| | - Osvaldo Yañez
- Centro de Bioinformática y Simulación Molecular, Facultad de Ingeniería, Universidad de Talca, 2 Norte 685, Casilla 721, Talca, Chile
| | - Julio Caballero
- Centro de Bioinformática y Simulación Molecular, Facultad de Ingeniería, Universidad de Talca, 2 Norte 685, Casilla 721, Talca, Chile
| | - Antonio Galdámez
- Department of Chemistry, Faculty of Sciences, University of Chile, Santiago, Chile
| | - Natalia Mena
- Department of Biology, Faculty of Sciences, University of Chile, Santiago, Chile
| | - Marco T Nuñez
- Department of Biology, Faculty of Sciences, University of Chile, Santiago, Chile
| | - Bruce K Cassels
- Department of Chemistry, Faculty of Sciences, University of Chile, Santiago, Chile
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Aliaga ME, Tiznado W, Cassels BK, Nuñez MT, Millán D, Pérez EG, García-Beltrán O, Pavez P. Substituent effects on reactivity of 3-cinnamoylcoumarins with thiols of biological interest. RSC Adv 2014. [DOI: 10.1039/c3ra44695f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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García-Beltrán O, Mena N, Berríos TA, Castro EA, Cassels BK, Núñez MT, Aliaga ME. A selective fluorescent probe for the detection of mercury (II) in aqueous media and its applications in living cells. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.09.111] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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García-Beltrán O, Mena N, Friedrich LC, Netto-Ferreira JC, Vargas V, Quina FH, Núñez MT, Cassels BK. Design and synthesis of a new coumarin-based ‘turn-on’ fluorescent probe selective for Cu+2. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.07.082] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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García-Beltrán O, González C, Pérez EG, Cassels BK, Santos JG, Millán D, Mena N, Pavez P, Aliaga ME. Nucleophilic reactivity of biothiols toward coumarin-based derivatives containing a chalcone moiety. J PHYS ORG CHEM 2012. [DOI: 10.1002/poc.2975] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Olimpo García-Beltrán
- Department of Chemistry, Faculty of Sciences; University of Chile; Santiago Chile
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas; Universidad Andrés Bello; Avenida República 275, Piso 3 Santiago Chile
| | - Christopher González
- Facultad de Química; Pontificia Universidad Católica de Chile; Av. Vicuña Mackenna 4860 Santiago 6094411 Chile
| | - Edwin G. Pérez
- Facultad de Química; Pontificia Universidad Católica de Chile; Av. Vicuña Mackenna 4860 Santiago 6094411 Chile
| | - Bruce K. Cassels
- Department of Chemistry, Faculty of Sciences; University of Chile; Santiago Chile
- Institute for Cell Dynamics and Biotechnology; University of Chile; Santiago Chile
| | - José G. Santos
- Facultad de Química; Pontificia Universidad Católica de Chile; Av. Vicuña Mackenna 4860 Santiago 6094411 Chile
| | - Daniela Millán
- Facultad de Química; Pontificia Universidad Católica de Chile; Av. Vicuña Mackenna 4860 Santiago 6094411 Chile
| | - Natalia Mena
- Department of Biology, Faculty of Sciences; University of Chile; Santiago Chile
| | - Paulina Pavez
- Facultad de Química; Pontificia Universidad Católica de Chile; Av. Vicuña Mackenna 4860 Santiago 6094411 Chile
| | - Margarita E. Aliaga
- Facultad de Química; Pontificia Universidad Católica de Chile; Av. Vicuña Mackenna 4860 Santiago 6094411 Chile
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Iturriaga-Vásquez P, Carbone A, García-Beltrán O, Livingstone PD, Biggin PC, Cassels BK, Wonnacott S, Zapata-Torres G, Bermudez I. Molecular determinants for competitive inhibition of alpha4beta2 nicotinic acetylcholine receptors. Mol Pharmacol 2010; 78:366-75. [PMID: 20547737 DOI: 10.1124/mol.110.065490] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The Erythrina alkaloids erysodine and dihydro-beta-erythroidine (DHbetaE) are potent and selective competitive inhibitors of alpha4beta2 nicotinic acetylcholine receptors (nAChRs), but little is known about the molecular determinants of the sensitivity of this receptor subtype to inhibition by this class of antagonists. We addressed this issue by examining the effects of DHbetaE and a range of aromatic Erythrina alkaloids on [(3)H]cytisine binding and receptor function in conjunction with homology models of the alpha4beta2 nAChR, mutagenesis, and functional assays. The lactone group of DHbetaE and a hydroxyl group at position C-16 in aromatic Erythrina alkaloids were identified as major determinants of potency, which was decreased when the conserved residue Tyr126 in loop A of the alpha4 subunit was substituted by alanine. Sensitivity to inhibition was also decreased by substituting the conserved aromatic residues alpha4Trp182 (loop B), alpha4Tyr230 (loop C), and beta2Trp82 (loop D) and the nonconserved beta2Thr84; however, only alpha4Trp182 was predicted to contact bound antagonist, suggesting alpha4Tyr230, beta2Trp82, and beta2Thr84 contribute allosterically to the closed state elicited by bound antagonist. In addition, homology modeling predicted strong ionic interactions between the ammonium center of the Erythrina alkaloids and beta2Asp196, leading to the uncapping of loop C. Consistent with this, beta2D196A abolished sensitivity to inhibition by DHbetaE or erysodine but not by epierythratidine, which is not predicted to form ionic bonds with beta2Asp196. This residue is not conserved in subunits that comprise nAChRs with low sensitivity to inhibition by DHbetaE or erysodine, which highlights beta2Asp196 as a major determinant of the receptor selectivity of Erythrina alkaloids.
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