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Mazza F, Thornquist O, Castellanos L, Butterworth T, Richard C, Boudon V, Bohlin A. The ro-vibrational ν 2 mode spectrum of methane investigated by ultrabroadband coherent Raman spectroscopy. J Chem Phys 2023; 158:094201. [PMID: 36889980 DOI: 10.1063/5.0138803] [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: 03/06/2023] Open
Abstract
We present the first experimental application of coherent Raman spectroscopy (CRS) on the ro-vibrational ν2 mode spectrum of methane (CH4). Ultrabroadband femtosecond/picosecond (fs/ps) CRS is performed in the molecular fingerprint region from 1100 to 2000 cm-1, employing fs laser-induced filamentation as the supercontinuum generation mechanism to provide the ultrabroadband excitation pulses. We introduce a time-domain model of the CH4 ν2 CRS spectrum, including all five ro-vibrational branches allowed by the selection rules Δv = 1, ΔJ = 0, ±1, ±2; the model includes collisional linewidths, computed according to a modified exponential gap scaling law and validated experimentally. The use of ultrabroadband CRS for in situ monitoring of the CH4 chemistry is demonstrated in a laboratory CH4/air diffusion flame: CRS measurements in the fingerprint region, performed across the laminar flame front, allow the simultaneous detection of molecular oxygen (O2), carbon dioxide (CO2), and molecular hydrogen (H2), along with CH4. Fundamental physicochemical processes, such as H2 production via CH4 pyrolysis, are observed through the Raman spectra of these chemical species. In addition, we demonstrate ro-vibrational CH4 v2 CRS thermometry, and we validate it against CO2 CRS measurements. The present technique offers an interesting diagnostics approach to in situ measurement of CH4-rich environments, e.g., in plasma reactors for CH4 pyrolysis and H2 production.
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Affiliation(s)
- Francesco Mazza
- Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
| | - Ona Thornquist
- Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
| | - Leonardo Castellanos
- Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
| | - Thomas Butterworth
- Faculty of Science and Engineering, Maastricht University, Paul Henri Spaaklaan 1, 6229 GS Maastricht, The Netherlands
| | - Cyril Richard
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université Bourgogne Franche-Comté, 9 Avenue Alain Savary, BP 47 870, F-21078 Dijon Cedex, France
| | - Vincent Boudon
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Université Bourgogne Franche-Comté, 9 Avenue Alain Savary, BP 47 870, F-21078 Dijon Cedex, France
| | - Alexis Bohlin
- Faculty of Aerospace Engineering, Delft University of Technology, Kluyverweg 1, 2629 HS Delft, The Netherlands
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Borges RM, das Neves Costa F, Chagas FO, Teixeira AM, Yoon J, Weiss MB, Crnkovic CM, Pilon AC, Garrido BC, Betancur LA, Forero AM, Castellanos L, Ramos FA, Pupo MT, Kuhn S. Data Fusion-based Discovery (DAFdiscovery) pipeline to aid compound annotation and bioactive compound discovery across diverse spectral data. Phytochem Anal 2023; 34:48-55. [PMID: 36191930 DOI: 10.1002/pca.3178] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 09/17/2022] [Indexed: 06/16/2023]
Abstract
INTRODUCTION Data Fusion-based Discovery (DAFdiscovery) is a pipeline designed to help users combine mass spectrometry (MS), nuclear magnetic resonance (NMR), and bioactivity data in a notebook-based application to accelerate annotation and discovery of bioactive compounds. It applies Statistical Total Correlation Spectroscopy (STOCSY) and Statistical HeteroSpectroscopy (SHY) calculation in their data using an easy-to-follow Jupyter Notebook. METHOD Different case studies are presented for benchmarking, and the resultant outputs are shown to aid natural products identification and discovery. The goal is to encourage users to acquire MS and NMR data from their samples (in replicated samples and fractions when available) and to explore their variance to highlight MS features, NMR peaks, and bioactivity that might be correlated to accelerated bioactive compound discovery or for annotation-identification studies. RESULTS Different applications were demonstrated using data from different research groups, and it was shown that DAFdiscovery reproduced their findings using a more straightforward method. CONCLUSION DAFdiscovery has proven to be a simple-to-use method for different situations where data from different sources are required to be analyzed together.
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Affiliation(s)
- Ricardo Moreira Borges
- Instituto de Pesquisas de Produtos Naturais Walter Mors, Universidade Federal do Rio de Janeiro, Brazil
| | - Fernanda das Neves Costa
- Instituto de Pesquisas de Produtos Naturais Walter Mors, Universidade Federal do Rio de Janeiro, Brazil
| | - Fernanda O Chagas
- Instituto de Pesquisas de Produtos Naturais Walter Mors, Universidade Federal do Rio de Janeiro, Brazil
| | - Andrew Magno Teixeira
- Instituto de Pesquisas de Produtos Naturais Walter Mors, Universidade Federal do Rio de Janeiro, Brazil
| | - Jaewon Yoon
- Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Brazil
| | | | | | - Alan Cesar Pilon
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Brazil
| | - Bruno C Garrido
- Chemical Metrology Division, Organic Analysis Laboratory, Inmetro, Brazil
| | - Luz Adriana Betancur
- Departamento de Química, Edificio Orlando Sierra, Universidad de Caldas, Caldas, Colombia
| | - Abel M Forero
- Departamento de Química, Universidad Nacional de Colombia, Sede Bogotá, Bogotá, Colombia
- Departamento de Química, Facultad de Ciencias and Centro de Investigacions Científicas Avanzadas (CI-CA) Universidade de A Coruña, Coruña, Spain
| | - Leonardo Castellanos
- Departamento de Química, Universidad Nacional de Colombia, Sede Bogotá, Bogotá, Colombia
| | - Freddy A Ramos
- Departamento de Química, Universidad Nacional de Colombia, Sede Bogotá, Bogotá, Colombia
| | - Mônica T Pupo
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Brazil
| | - Stefan Kuhn
- School of Computer Science and Informatics, De Montfort University, UK
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Mazza F, Buurmeijer H, Castellanos L, Bohlin A. Coherent N 2 + emission mediated by coherent Raman scattering for gas-phase thermometry. Opt Lett 2022; 47:6105-6108. [PMID: 37219183 DOI: 10.1364/ol.476540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 10/30/2022] [Indexed: 05/24/2023]
Abstract
We report on the generation of coherent emission from femtosecond (fs) laser-induced filaments mediated by ultrabroadband coherent Raman scattering (CRS), and we investigate its application for high-resolution gas-phase thermometry. Broadband 35-fs, 800-nm pump pulses generate the filament through photoionization of the N2 molecules, while narrowband picosecond (ps) pulses at 400 nm seed the fluorescent plasma medium via generation of an ultrabroadband CRS signal, resulting in a narrowband and highly spatiotemporally coherent emission at 428 nm. This emission satisfies the phase-matching for the crossed pump-probe beams geometry, and its polarization follows the CRS signal polarization. We perform spectroscopy on the coherent N2 + signal to investigate the rotational energy distribution of the N2 + ions in the excited B2Σu + electronic state and demonstrate that the ionization mechanism of the N2 molecules preserves the original Boltzmann distribution to within the experimental conditions tested.
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Sherwood J, Castellanos L, Sands M, Balliro C, Hillard M, Gaston S, Marchetti P, Bartholomew R, Greux E, Uluer A, Sawicki G, Neuringer I, El-Khatib F, Damiano E, Russell S, Putman M. 9 Automated insulin delivery with the iLet bionic pancreas for the management of cystic fibrosis–related diabetes. J Cyst Fibros 2022. [DOI: 10.1016/s1569-1993(22)00700-7] [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: 11/07/2022]
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Mazza F, Stutvoet A, Castellanos L, Kliukin D, Bohlin A. Coherent Raman spectroscopy on hydrogen with in-situ generation, in-situ use, and in-situ referencing of the ultrabroadband excitation. Opt Express 2022; 30:35232-35245. [PMID: 36258479 DOI: 10.1364/oe.465817] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Accepted: 08/25/2022] [Indexed: 06/16/2023]
Abstract
Time-resolved spectroscopy can provide valuable insights in hydrogen chemistry, with applications ranging from fundamental physics to the use of hydrogen as a commercial fuel. This work represents the first-ever demonstration of in-situ femtosecond laser-induced filamentation to generate a compressed supercontinuum behind a thick optical window, and its in-situ use to perform femtosecond/picosecond coherent Raman spectroscopy (CRS) on molecular hydrogen (H2). The ultrabroadband coherent excitation of Raman active molecules in measurement scenarios within an enclosed space has been hindered thus far by the window material imparting temporal stretch to the pulse. We overcome this challenge and present the simultaneous single-shot detection of the rotational H2 and the non-resonant CRS spectra in a laminar H2/air diffusion flame. Implementing an in-situ referencing protocol, the non-resonant spectrum measures the spectral phase of the supercontinuum pulse and maps the efficiency of the ultrabroadband coherent excitation achieved behind the window. This approach provides a straightforward path for the implementation of ultrabroadband H2 CRS in enclosed environment such as next-generation hydrogen combustors and reforming reactors.
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Urrego N, Sepúlveda P, Aragón M, Ramos FA, Costa GM, Ospina LF, Castellanos L. Flavonoids and saponins from Passiflora edulis f. edulis leaves (purple passion fruit) and its potential anti-inflammatory activity. J Pharm Pharmacol 2021; 73:1530-1538. [PMID: 34436599 DOI: 10.1093/jpp/rgab117] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 07/19/2021] [Indexed: 12/14/2022]
Abstract
OBJECTIVES The objective of this work was to evaluate the anti-inflammatory activity of the aqueous extract, fractions and major compounds, which are isolated and identified from Passiflora edulis f. edulis (purple passion fruit) leaves extract. METHODS For the isolation of the major compounds, reversed-phase chromatography and normal phase countercurrent chromatography were used. The separation was followed by thin layer chromatography and HPLC-DAD-ELSD. One-dimensional and two-dimensional NMR and ESI-TOF-MS/MS were used for structural elucidation. The anti-inflammatory activity was evaluated on a TPA multiple dose model of skin chronic inflammation in mice. Additionally, myeloperoxidase (MPO) and nitric oxide synthase (NOS) activity assays were performed as possible mechanisms of action studies. KEY FINDINGS AND CONCLUSIONS The study of the butanolic fraction mainly showed the presence of saponins and flavonoids. Three minor flavonoids were detected; and three known saponins, cyclopassiflosides IX, XI and III were isolated and identified. This is the first unequivocal report of the presence of these compounds in P. edulis f. edulis leaves. The most favourable results of anti-inflammatory activity were obtained for the flavonoid-rich fraction. All the fractions and isolated compounds evaluated, presented high percentages of inhibition of nitric oxide synthase activity.
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Affiliation(s)
- Norman Urrego
- Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Farmacia, Bogotá, Colombia
| | - Paula Sepúlveda
- Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Farmacia, Bogotá, Colombia
| | - Marcela Aragón
- Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Farmacia, Bogotá, Colombia
| | - Freddy A Ramos
- Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Química, Bogotá, Colombia
| | - Geison M Costa
- Pontificia Universidad Javeriana, Facultad de Ciencias, Departamento de Química, Bogotá, Colombia
| | - Luis F Ospina
- Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Farmacia, Bogotá, Colombia
| | - Leonardo Castellanos
- Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Química, Bogotá, Colombia
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Forero AM, Castellanos L, Sandoval-Hernández AG, Magalhães A, Tinoco LW, Lopez-Vallejo F, Ramos FA. Integration of NMR studies, computational predictions, and in vitro assays in the search of marine diterpenes with antitumor activity. Chem Biol Drug Des 2021; 98:507-521. [PMID: 34143939 DOI: 10.1111/cbdd.13907] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 04/14/2021] [Accepted: 06/06/2021] [Indexed: 12/01/2022]
Abstract
Among the compounds of natural origin, diterpenes have proved useful as drugs for the treatment of cancer. Marine organisms, such as soft corals and algae, are a promising source of diterpenes, being a rich and unexplored source of cytotoxic agents. This study evaluated a library of 32 natural and semisynthetic marine diterpenes, including briarane, cembrane, and dolabellane nuclei, with the aim of determining their cytotoxicity against three human cancer cell lines (A549, MCF7, and PC3). The three most active compounds were submitted to a flow cytometry analysis in order to determine induction of apoptosis against the A549 cell line. An NMR analysis was conducted to determine and evaluate the interactions between active diterpenes and tubulin. These interactions were characterized by a computational study using molecular docking and MD simulations. With these results, two cembrane and one chlorinated briarane diterpenes were active against the three human cancer cell lines, induced apoptosis in the A549 cell line, and showed interactions with tubulin preferably at the taxane-binding site. This study is a starting point for the identification and optimization of the marine diterpenes selected for better antitumor activities. It also highlights the power of integrating NMR studies, computational predictions, and in vitro assays in the search for compounds with antitumor activity.
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Affiliation(s)
- Abel M Forero
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia - Sede Bogotá, Bogotá, Colombia.,Departamento de Farmacia, Facultad de Ciencias, Universidad Nacional de Colombia - Sede Bogotá, Bogotá, Colombia
| | - Leonardo Castellanos
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia - Sede Bogotá, Bogotá, Colombia
| | - Adrián G Sandoval-Hernández
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia - Sede Bogotá, Bogotá, Colombia.,Instituto de Genética Humana, Universidad Nacional de Colombia - Sede Bogotá, Bogotá, Colombia
| | - Alvicler Magalhães
- Laboratório de Apoio ao Desenvolvimento Tecnológico (LADETEC), Instituto de Química, Avenida Horácio Macedo, Cidade Universitária, Rio de Janeiro, Brazil
| | - Luzineide W Tinoco
- Laboratório Multiusuário de Análises por RMN (LAMAR), Instituto de Pesquisas de Produtos Naturais (IPPN), Universidade Federal Do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fabian Lopez-Vallejo
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia - Sede Bogotá, Bogotá, Colombia
| | - Freddy A Ramos
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia - Sede Bogotá, Bogotá, Colombia
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Amaya García F, Cirne-Santos C, de Souza Barros C, Pinto AM, Sanchez Nunez ML, Laneuville Teixeira V, Resende JALC, Ramos FA, Paixão ICNP, Castellanos L. Semisynthesis of Dolabellane Diterpenes: Oxygenated Analogues with Increased Activity against Zika and Chikungunya Viruses. J Nat Prod 2021; 84:1373-1384. [PMID: 33822611 DOI: 10.1021/acs.jnatprod.1c00199] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Brown algae and soft corals represent the main marine sources of dolabellane diterpenes. The antiviral activity of dolabellanes has been studied for those isolated from algae, whereas dolabellanes isolated from soft corals have been barely studied. In this work, a collection of dolabellane diterpenes consisting of five natural and 21 semisynthetic derivatives was constructed, and their antiviral activities against Zika (ZIKV) and Chikungunya (CHIKV) viruses were tested. Dolabellatrienone (1) and (1R,7R,8R,11S)-7,8-epoxy-13-keto-dolabella-3,12(18)-diene (2), isolated from Eunicea genus soft corals, were employed to obtain 21 dolabellane and dolastane diterpenes by reactions such as allylic oxidations, reductions, acid-catalyzed epoxide ring opening, and acetylations. All of the compounds were identified by a combination of one- and two-dimensional NMR, mass spectrometry, and X-ray diffraction experiments. The cytotoxicites against Vero cells and the antiviral activities against ZIKV and CHIKV was tested to calculate the half-maximal effective concentration (EC50) and selectivity indexes (SIs). In general, the addition of oxygen-containing functional groups improved the bioactivity of dolabellane and dolastane diterpenes against ZIKV and CHIKV replication. Compound 9 showed an EC50 = 0.92 ± 0.08 μM and SI = 820 against ZIKV.
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Affiliation(s)
- Fabián Amaya García
- Universidad Nacional de Colombia-Sede Bogotá, Facultad de Ciencias, Departamento de Química, Bogotá D.C. 111321, Colombia
| | - Claudio Cirne-Santos
- Instituto de Biologia, Universidade Federal Flumimense, Niterói 24020-141, RJ, Brazil
| | | | - Ana Maria Pinto
- Instituto Biomédico, Universidade Federal Fluminense, Niterói 24020-141, RJ, Brazil
| | | | - Valeria Laneuville Teixeira
- Instituto de Biologia, Universidade Federal Flumimense, Niterói 24020-141, RJ, Brazil
- Instituto de Biociências, Universidad Federal do Estado de Rio de Janeiro, Rio de Janeiro 22290-255, RJ, Brazil
| | - Jackson A L C Resende
- Instituto de Ciências Exatas e da Terra, Universidade Federal de Mato Grosso-Barra do Garças, Barra do Garças 78605-091, MT, Brazil
| | - Freddy A Ramos
- Universidad Nacional de Colombia-Sede Bogotá, Facultad de Ciencias, Departamento de Química, Bogotá D.C. 111321, Colombia
| | - Izabel C N P Paixão
- Instituto de Biologia, Universidade Federal Flumimense, Niterói 24020-141, RJ, Brazil
| | - Leonardo Castellanos
- Universidad Nacional de Colombia-Sede Bogotá, Facultad de Ciencias, Departamento de Química, Bogotá D.C. 111321, Colombia
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Monzón Daza G, Meneses Macías C, Forero AM, Rodríguez J, Aragón M, Jiménez C, Ramos FA, Castellanos L. Identification of α-Amylase and α-Glucosidase Inhibitors and Ligularoside A, a New Triterpenoid Saponin from Passiflora ligularis Juss (Sweet Granadilla) Leaves, by a Nuclear Magnetic Resonance-Based Metabolomic Study. J Agric Food Chem 2021; 69:2919-2931. [PMID: 33621072 DOI: 10.1021/acs.jafc.0c07850] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The leaves of Passiflora ligularis Juss (known as sweet granadilla for its edible fruits) are a crop byproduct that is discarded. With the aim of contributing to give value-added products from these crop by-side products to farmers of Colombian Andes, we carried out a 1H-NMR-metabolomics analysis of polar extracts from leaves collected in three locations and stored in two conditions in order to identify glucosyl-hydrolase inhibitors. Variations in the metabolic profile and the bioactivity among samples were analyzed by orthogonal partial least square discriminant analysis. Thus, 1H-NMR signals related to polyphenolic compounds, saponins, and amino acids were correlated with higher inhibitory activities. Moreover, a targeted NMR and HPLC-MS/MS analysis allowed the identification of 14 polyphenolic compounds and the structural characterization of a new triterpenoid saponin, ligularoside A. The measurements of IC50 values for α-amylase and α-glycosidase inhibitors allowed the identification of quercetin-3-O-β-glucoside, kaempferol-3-O-β-glucoside, and ligularoside A as the most active compounds. These results suggest that P. ligularis leaves are a source of glucosyl-hydrolase inhibitors and lay the foundation for exploring additional applications.
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Affiliation(s)
- Gabriel Monzón Daza
- Facultad de Ciencias, Departamento de Química, Universidad Nacional de Colombia - Sede Bogotá, Bogotá, Carrera 30# 45-03, Bogotá, D.C. 111321, Colombia
| | - Carolina Meneses Macías
- Facultad de Ciencias, Departamento de Química, Universidad Nacional de Colombia - Sede Bogotá, Bogotá, Carrera 30# 45-03, Bogotá, D.C. 111321, Colombia
| | - Abel M Forero
- Facultad de Ciencias, Departamento de Química, Universidad Nacional de Colombia - Sede Bogotá, Bogotá, Carrera 30# 45-03, Bogotá, D.C. 111321, Colombia
- Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Química, Facultade de Ciencias, AE CICA-INIBIC, Universidade da Coruña, A Coruña E-15071, Spain
| | - Jaime Rodríguez
- Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Química, Facultade de Ciencias, AE CICA-INIBIC, Universidade da Coruña, A Coruña E-15071, Spain
| | - Marcela Aragón
- Facultad de Ciencias, Departamento de Farmacia, Universidad Nacional de Colombia - Sede Bogotá, Bogotá, Carrera 30# 45-03, Bogotá, D.C. 111321, Colombia
| | - Carlos Jiménez
- Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Química, Facultade de Ciencias, AE CICA-INIBIC, Universidade da Coruña, A Coruña E-15071, Spain
| | - Freddy A Ramos
- Facultad de Ciencias, Departamento de Química, Universidad Nacional de Colombia - Sede Bogotá, Bogotá, Carrera 30# 45-03, Bogotá, D.C. 111321, Colombia
| | - Leonardo Castellanos
- Facultad de Ciencias, Departamento de Química, Universidad Nacional de Colombia - Sede Bogotá, Bogotá, Carrera 30# 45-03, Bogotá, D.C. 111321, Colombia
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Castellanos L, Mazza F, Kliukin D, Bohlin A. Pure-rotational 1D-CARS spatiotemporal thermometry with a single regenerative amplifier system. Opt Lett 2020; 45:4662-4665. [PMID: 32870825 DOI: 10.1364/ol.398982] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 07/16/2020] [Indexed: 06/11/2023]
Abstract
We report spatiotemporal pure-rotational coherent anti-Stokes Raman spectroscopy (CARS) in a one-dimensional imaging arrangement obtained with a single ultrafast regenerative amplifier system. The femtosecond pump/Stokes photon pairs, used for impulsive excitation, are delivered by an external compressor operating on a ∼35% beam split of the uncompressed amplifier output (2.5 mJ/pulse). The picosecond 1.2 mJ probe pulse is produced via the second-harmonic bandwidth compression (SHBC) of the ∼65% remainder of the amplifier output (4.5 mJ/pulse), which originates from the internal compressor. The two pump/Stokes and probe pulses are spatially, temporally, and repetition-wise correlated at the measurement, and the signal generation plane is relayed by a wide-field coherent imaging spectrometer onto the detector plane, which is refreshed at the same repetition rate as the ultrafast regenerative amplifier system. We demonstrate 1 kHz cinematographic 1D-CARS gas-phase thermometry across an unstable premixed methane/air flame-front, achieved with a single-shot precision <1% and accuracy <3%, 1.4 mm field of view, and an excellent <20µm line-spread function.
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Castellanos L, Naranjo-Gaybor SJ, Forero AM, Morales G, Wilson EG, Ramos FA, Choi YH. Metabolic fingerprinting of banana passion fruits and its correlation with quorum quenching activity. Phytochemistry 2020; 172:112272. [PMID: 32032827 DOI: 10.1016/j.phytochem.2020.112272] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 06/05/2019] [Revised: 01/07/2020] [Accepted: 01/13/2020] [Indexed: 06/10/2023]
Abstract
Banana passion fruit of the Passiflora genus, are commercially cultivated on a small to medium scale, mainly as edible fruits or as components of traditional herbal medicines. This subgenus comprises several species and hybrid specimens that grow readily in the wild. Due to their taxonomical complexity, many of these species have recently been reclassified (Ocampo Pérez and Coppens d'Eeckenbrugge, 2017), and their chemical profile has still to be determined. In this study, an 1H NMR-based platform was applied to the chemical profiling of seven wild species of the Passiflora subgenus, and UHPLC-DAD-MS was additionally used for the identification of phenolic compounds. A total of 59 compounds were detected including 26 O- and C-glycosidated flavonoids and polyphenols, nine organic acids, seven amino acids, GABA, sucrose, glucose, myo-inositol, and five other non-identified compounds. Two of the identified compounds are the previously undescribed C-glycosyl flavonoids, apigenin-4'-O-β-glucopyranosyl, 8-C-β-(6″acetyl)-glucopyranoside and apigenin-4-O-β-glucopyranosyl-8-C-β-neohesperidoside. These C-glycosyl flavonoids were isolated to confirm their proposed structures by NMR and LCMS analysis. The PCA score plots obtained from the 1H NMR data of the studied Passiflora samples showed P. cumbalensis and P. uribei as the species with the most distinguishable chemical profile. In addition, a correlation analysis using OPLS-DA was conducted between 1H-NMR data and the quorum quenching activity (QQ) of Chromobacterium violaceum ATCC 31532. This analysis revealed P. lehmannii, and P. uribei extracts to be the most active, and apigenin-4'-O-β-glucopyranosyl, 8-C-β-(6″acetyl)-glucopyranoside and apigenin-4-O-β-glucopyranosyl-8-C-β-neohesperidoside were identified as possibly responsible for the QQ activity. To confirm this, QQ activity of both compounds was tested against C. violaceum ATCC 3153. An inhibition of violacein production of 0.135 mM (100 μg/mL) and 0.472 mM (300 μg/mL) was observed for apigenin-4'-O-β-glucopyranosyl,8-C-β-(6″acetyl)-glucopyranoside and apigenin-4-O-β-glucopyranosyl-8-C-β-neohesperidoside respectively, while bacterial growth was unaffected in both cases. Furthermore, both compounds showed the ability to inhibit the production of the toxoflavin of the phytopathogen Burkholderia glumae ATCC 33617.
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Affiliation(s)
- Leonardo Castellanos
- Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Química, Carrera 30 # 45-03, Bogotá, D.C., 111321, Colombia; Natural Products Laboratory, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, the Netherlands.
| | - Sandra Judith Naranjo-Gaybor
- Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Química, Carrera 30 # 45-03, Bogotá, D.C., 111321, Colombia; Universidad de las Fuerzas Armadas. ESPE Carrera de Ingeniería Agropecuaria Extensión Santo Domingo, Av. General Rumiñahui s/n, Sangolquí, Ecuador
| | - Abel M Forero
- Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Química, Carrera 30 # 45-03, Bogotá, D.C., 111321, Colombia
| | - Gustavo Morales
- Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Química, Carrera 30 # 45-03, Bogotá, D.C., 111321, Colombia
| | - Erica Georgina Wilson
- Natural Products Laboratory, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, the Netherlands
| | - Freddy A Ramos
- Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Química, Carrera 30 # 45-03, Bogotá, D.C., 111321, Colombia
| | - Young Hae Choi
- Natural Products Laboratory, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, the Netherlands; College of Pharmacy, Kyung Hee University, 02447, Seoul, Republic of Korea
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Molina SL, Forero AM, Ayala FI, Puyana M, Zea S, Castellanos L, Muñoz D, Arboleda G, Sandoval-Hernández AG, Ramos FA. Metabolic Profiling of the Soft Coral Erythropodium caribaeorum (Alcyonacea: Anthothelidae) from the Colombian Caribbean Reveals Different Chemotypes. Mar Drugs 2019; 18:E4. [PMID: 31861453 PMCID: PMC7024379 DOI: 10.3390/md18010004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Revised: 10/11/2019] [Accepted: 10/12/2019] [Indexed: 12/23/2022] Open
Abstract
The Caribbean soft coral Erythropodium caribaeorum is a rich source of erythrolides-chlorinated briarane diterpenoids. These compounds have an ecological role as feeding deterrents, with a wide variation in their composition depending on the location where the sample is collected. In Colombia, this soft coral can be found at different locations in the Caribbean Sea including Santa Marta, Islas del Rosario, and Providencia-three environmentally different coral reef areas in the south and southwest Caribbean Sea. In order to evaluate differences in erythrolide composition, the metabolic profiles of samples from each of these locations were analyzed by HPLC-MS. Principal component analysis showed changes in the diterpene composition according to the sample origin. Diterpenes from samples collected at each location were isolated to describe the three chemotypes. The chemotype from Santa Marta was highly diverse, with the new erythrolides W and X together with eight known erythrolides. The sample from Islas del Rosario showed a low diversity chemotype constituted by high amounts of erythrolide A and B. The chemotype from Providencia showed low chemical diversity with only two main compounds-erythrolide V and R. Evaluation of cytotoxic activity against the human cancer cell lines PC-3, MCF7, and A549 showed erythrolides A and B as the more active compounds with IC50 values in the range from 2.45 to 30 μM.
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Affiliation(s)
- Sandra L. Molina
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
| | - Abel M. Forero
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
| | - Farja I. Ayala
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
| | - Mónica Puyana
- Departamento de Ciencias Biológicas y Ambientales, Facultad de Ciencias Naturales e Ingeniería, Universidad Jorge Tadeo Lozano Sede Bogotá, Cra 4 22-6,1, 110010 Bogotá, Colombia;
| | - Sven Zea
- Instituto de Estudios en Ciencias del Mar-CECIMAR, Universidad Nacional de Colombia Sede Caribe, 470006 Santa Marta, Colombia;
| | - Leonardo Castellanos
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
| | - Diego Muñoz
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
- Facultad de Ciencias, Universidad de Ciencias Aplicadas y Ambientales, 111166 Bogotá, Colombia
| | - Gonzalo Arboleda
- Instituto de Genética Humana, Universidad Nacional de Colombia Sede Bogotá, 111112 Bogotá, Colombia;
| | - Adrián G. Sandoval-Hernández
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
- Instituto de Genética Humana, Universidad Nacional de Colombia Sede Bogotá, 111112 Bogotá, Colombia;
| | - Freddy A. Ramos
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia Sede Bogotá, Av Cra 30 45-03, 111112 Bogotá, Colombia; (S.L.M.); (A.M.F.); (F.I.A.); (L.C.); (D.M.); (A.G.S.-H.)
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Bernal Rodriguez CA, Bassani VL, Castellanos L, Ramos Rodríguez FA, Baena Y. Development of an oral control release system from Physalis peruviana L. fruits extract based on the co-spray-drying method. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2019.06.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Puyana M, Prato JA, Nieto CF, Ramos FA, Castellanos L, Pinzón P, Zárate JC. Experimental Approaches for the Evaluation of Allelopathic Interactions Between Hermatypic Corals and Marine Benthic Cyanobacteria in the Colombian Caribbean. Acta biol Colomb 2019. [DOI: 10.15446/abc.v24n2.72706] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Blooms of marine benthic cyanobacteria are recurrent in several locations at the Colombian Caribbean. In these events, cyanobacteria grow over the substrate and benthic organisms although their effect has not been fully assessed. This study evaluated interactions between cyanobacteria and hermatypic corals, in order to identify any deleterious effects that could be related to allelopathic mechanisms. Organic extracts from cyanobacteria collected in San Andres, Old Providence and Rosario islands were tested against embryos of the reef-building coral Orbicella annularis. The indirect effect of cyanobacterial extracts was also assessed by resuspending the extracts in seawater and monitoring polyp retraction and recovery of the coral Madracis mirabilis (=auretenra). Additionally, the effect of direct contact between cyanobacterial extracts and the coral Porites porites was assessed by incorporating cyanobacterial extracts into PhytagelTM gels and placed in direct contact with the coral. After 24, 48 and 72 h of exposure, chromatographic profiles of associated zooxanthellae was evaluated by HPLC. A deleterious effect on the zooxanthellae was evidenced by an increase in pheophytin, a degradation product from chlorophyll. The competitive abilities of algae and cyanobacteria should be considered as a constraint to reef restoration initiatives. Cyanobacteria have the ability to compete with corals due to their growth rates, defenses against herbivory and potentially allelopathic mechanisms.
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Suárez-Moreno ZR, Vinchira-Villarraga DM, Vergara-Morales DI, Castellanos L, Ramos FA, Guarnaccia C, Degrassi G, Venturi V, Moreno-Sarmiento N. Plant-Growth Promotion and Biocontrol Properties of Three Streptomyces spp. Isolates to Control Bacterial Rice Pathogens. Front Microbiol 2019; 10:290. [PMID: 30858835 PMCID: PMC6398372 DOI: 10.3389/fmicb.2019.00290] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [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: 08/31/2018] [Accepted: 02/04/2019] [Indexed: 11/23/2022] Open
Abstract
Bacterial Panicle Blight caused by Burkholderia glumae is a major disease of rice, which has dramatically affected rice production around the world in the last years. In this study we describe the assessment of three Streptomyces isolates as biocontrol agents for B. glumae. Additionally, the presence of other plant-growth promoting abilities and their possible beneficial effects upon their inoculation on rice plants was evaluated as an ecological analysis for their future inoculation in rice crops. Two isolates (A20 and 5.1) inhibited growth of virulent B. glumae strains, as well as a wide range of bacterial and fungal species, while a third strain (7.1) showed only antifungal activity. In vitro tests demonstrated the ability of these strains to produce siderophores, Indoleacetic acid (IAA), extracellular enzymes and solubilizing phosphate. Greenhouse experiments with two rice cultivars indicated that Streptomyces A20 is able to colonize rice plants and promote plant growth in both cultivars. Furthermore, an egfp tagged mutant was generated and colonization experiments were performed, indicating that Streptomyces A20 –GFP was strongly associated with root hairs, which may be related to the plant growth promotion observed in the gnotobiotic experiments. In order to characterize the antimicrobial compounds produced by strain A20 bacteria, mass spectrometry analyses were performed. This technique indicated that A20 produced several antimicrobial compounds with sizes below 3 kDa and three of these molecules were identified as Streptotricins D, E and F. These findings indicate the potential of Streptomyces A20 as a biocontrol inoculant to protect rice plants against bacterial diseases.
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Affiliation(s)
| | | | | | | | - Freddy A Ramos
- Departamento de Química. Universidad Nacional de Colombia, Bogotá, Colombia
| | - Corrado Guarnaccia
- Biotechnology Development Unit, International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
| | - Giuliano Degrassi
- Bacteriology and Plant Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
| | - Vittorio Venturi
- Bacteriology and Plant Bacteriology Group, International Centre for Genetic Engineering and Biotechnology, Trieste, Italy
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Marín-Loaiza J, Mejía-Agudelo L, Rojas M, Guerrero-Pabón M, Ramos F, Castellanos L. Antidepressant-like effects of methanol extract and fractions of Hypericum juniperinum kunth in the forced swimming test. Pharmacogn Mag 2019. [DOI: 10.4103/pm.pm_341_18] [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: 11/04/2022] Open
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Castellanos F, Amaya-García F, Tello E, Ramos FA, Umaña A, Puyana M, Resende JALC, Castellanos L. Screening of acetylcholinesterase inhibitors in marine organisms from the Caribbean Sea. Nat Prod Res 2018; 33:3533-3540. [DOI: 10.1080/14786419.2018.1481837] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Fabio Castellanos
- Departamento de Química, Universidad Nacional de Colombia , Bogota, Colombia
| | - Fabián Amaya-García
- Departamento de Química, Universidad Nacional de Colombia , Bogota, Colombia
| | - Edisson Tello
- Departamento de Química, Universidad Nacional de Colombia , Bogota, Colombia
| | | | - Adriana Umaña
- Departamento de Química, Universidad Nacional de Colombia , Bogota, Colombia
| | - Mónica Puyana
- Programa de Biología Marina, Departamento de Ciencias Biológicas y Ambientales, Universidad de Bogotá Jorge Tadeo Lozano , Bogotá, Colombia
| | - Jackson A. L. C. Resende
- Laboratório de Difração de Raios X, Instituto de Química, Universidade Federal Fluminense , Niterói, Brazil
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Bernal CA, Castellanos L, Aragón DM, Martínez-Matamoros D, Jiménez C, Baena Y, Ramos FA. Peruvioses A to F, sucrose esters from the exudate of Physalis peruviana fruit as α-amylase inhibitors. Carbohydr Res 2018; 461:4-10. [DOI: 10.1016/j.carres.2018.03.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 03/01/2018] [Accepted: 03/05/2018] [Indexed: 11/26/2022]
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19
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Espinoza G, Castellanos L, Rodriguez-Una I, Camacho PA, Parra JC. Clinical outcomes of patterned laser trabeculoplasty as adjuvant therapy in open angle glaucoma and ocular hypertension. Int J Ophthalmol 2018; 11:635-640. [PMID: 29675383 DOI: 10.18240/ijo.2018.04.16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 11/14/2017] [Accepted: 01/15/2018] [Indexed: 11/23/2022] Open
Abstract
AIM To assess the efficacy and safety of patterned laser trabeculoplasty (PLT) as an adjunctive treatment in open angle glaucoma (OAG) or ocular hypertension (OHT) patients who were under antiglaucoma medical treatment. METHODS This study was a retrospective review of primary or secondary OAG patients and OHT patients with medically uncontrolled (≥18 mm Hg) intraocular pressure (IOP) who underwent 360° PLT from June 2016 to August 2016. Follow-up visits at week 1, and 1, 3 and 6mo were performed. IOP, best corrected visual acuity (BCVA), complications and eye drop glaucoma medication were recorded at each follow-up visit. Success was defined as IOP reduction ≥20% from baseline. RESULTS Forty-one eyes of 25 patients were included in this study. Pre-treatment mean IOP was 20.2±1.6 mm Hg. After PLT, IOP was 19.3±5.2, 16.1±2.7, 17.1±3.7 and 16.3±3.5 mm Hg, at 1wk, 1, 3 and 6mo, respectively. IOP reduction from baseline was statistically significant from the first month, remaining stable at 6mo (P<0.001). PLT success at 6mo of follow-up was 48.78%. The number of glaucoma medication per eye (P=0.10) and the mean BCVA both remained constant (P=0.37). Complications included transient IOP spikes in 4 eyes (9.8%) and peripheral anterior synechiae in 7 eyes (17.1%). CONCLUSION PLT is an effective and safe method for the management of patients with OHT or OAG as an adjunctive therapy. Additional larger studies should be designed to verify the long-term stability of IOP reduction with this laser technology.
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Affiliation(s)
- Gustavo Espinoza
- Fundación Oftalmologica de Santander FOSCAL, Floridablanca, Santander, Colombia
| | | | - Ignacio Rodriguez-Una
- Instituto Oftalmologico Fernandez-Vega, University of Oviedo, Oviedo, Asturias 33012, Spain
| | - Paul Anthony Camacho
- Fundación Oftalmologica de Santander FOSCAL, Floridablanca, Santander, Colombia.,Facultad de Salud, Universidad Autonoma de Bucaramanga, Bucaramanga, Santander, Colombia
| | - Juan Camilo Parra
- Fundación Oftalmologica de Santander FOSCAL, Floridablanca, Santander, Colombia
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Gazola AC, Costa GM, Zucolotto SM, Castellanos L, Ramos FA, de Lima TCM, Schenkel EP. The sedative activity of flavonoids from Passiflora quadrangularis is mediated through the GABAergic pathway. Biomed Pharmacother 2018; 100:388-393. [PMID: 29454287 DOI: 10.1016/j.biopha.2018.02.002] [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] [Received: 11/03/2017] [Revised: 01/29/2018] [Accepted: 02/02/2018] [Indexed: 10/18/2022] Open
Abstract
The aim of this study was to investigate the sedative activity of the aqueous leaf extract of Passiflora quadrangularis, a species that is widely cultivated and consumed in South America, and to identify its main constituents and elucidate the involvement of the GABAergic pathway in its mechanism of action. The bioguided fractionation of the crude extract showed a positive relationship between the sedative activity of the extract and its flavonoids. The methods employed to identify and isolate its main flavonoids resulted in the identification of vitexin-2''-O-xyloside, vitexin-2''-O-glucoside, orientin-2''-O-xyloside and orientin-2''-O-glucoside. Vitexin-2"-O-xyloside, the major flavonoid of the extract, showed sedative activity after oral administration in mice.
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Affiliation(s)
- Andressa Corneo Gazola
- Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Florianópolis, 88040-970, Brazil; Departamento de Farmácia, Centro Universitário Barriga Verde, Orleans, 88870-000 Brazil.
| | - Geison Modesti Costa
- Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Florianópolis, 88040-970, Brazil; Departamento de Química, Pontificia Universidad Javeriana, Carrera 7 No.43-82, Bogotá, Colombia.
| | - Silvana Maria Zucolotto
- Departamento de Farmácia, Universidade Federal do Rio Grande do Norte, Natal, 59078-970, Brazil.
| | - Leonardo Castellanos
- Departamento de Química, Universidad Nacional de Colombia, Carrera 30 No.45-03, Bogotá, Colombia.
| | - Freddy Alejandro Ramos
- Departamento de Química, Universidad Nacional de Colombia, Carrera 30 No.45-03, Bogotá, Colombia.
| | | | - Eloir Paulo Schenkel
- Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Florianópolis, 88040-970, Brazil.
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Castano R, Yucesoy B, Johnson VJ, Castellanos L, Cartier A. Inflammatory proteins in nasal lavage of workers exposed to occupational agents. Clin Exp Allergy 2017; 47:1566-1573. [DOI: 10.1111/cea.13039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 08/04/2017] [Accepted: 09/02/2017] [Indexed: 12/26/2022]
Affiliation(s)
- R. Castano
- Department of Otolaryngology; Hôpital du Sacré-Coeur de Montréal; Montreal QC Canada
- Research Center; Axe Maladies Chroniques; Hôpital du Sacré-Coeur de Montréal; Montreal QC Canada
| | - B. Yucesoy
- Formerly of the Health Effects Laboratory Division; CDC/NIOSH; Morgantown WV USA
| | - V. J. Johnson
- Burleson Research Technologies, Inc.; Morrisville NC USA
| | - L. Castellanos
- Research Center; Axe Maladies Chroniques; Hôpital du Sacré-Coeur de Montréal; Montreal QC Canada
| | - A. Cartier
- Department of Chest Medicine; Hôpital du Sacré-Coeur de Montréal; Montreal QC Canada
- Research Center; Axe Maladies Chroniques; Hôpital du Sacré-Coeur de Montréal; Montreal QC Canada
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22
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Ayres ASFSJ, Santos WB, Junqueira-Ayres DD, Costa GM, Ramos FA, Castellanos L, Alves JSF, Asth L, Medeiros IUD, Zucolotto SM, Gavioli EC. Monoaminergic neurotransmission is mediating the antidepressant-like effects of Passiflora edulis Sims fo. edulis. Neurosci Lett 2017; 660:79-85. [PMID: 28893593 DOI: 10.1016/j.neulet.2017.09.010] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 08/29/2017] [Accepted: 09/05/2017] [Indexed: 12/14/2022]
Abstract
The genus Passiflora is popularly used to treat anxiety. Recent studies showed antidepressant-like effects of two varieties of P. edulis (edulis and flavicarpa) in mice. However, the mechanisms of antidepressant actions are still unknown. Here, the effects of P. edulis fo. edulis aqueous extract (AE, 100-300mg/kg, po), and ethyl acetate (AcOEt, 25-50mg/kg, po), butanol (BuOH, 25-50mg/kg, po) and residual aqueous (25-100mg/kg, po) fractions were investigated in the mouse forced swimming test. In addition, the involvement of monoamines in the P. edulis fractions-induced antidepressant actions was approached. HPLC analyses showed that AcOEt and BuOH, but not residual, fractions shared with AE the main peaks between 25 and 70min (UV 340nm), which are suggestive of flavonoids. Nortriptyline and fluoxetine reduced the immobility time and similar results were observed for AE, AcOEt and BuOH but not residual fractions. PCPA (inhibitor of 5-HT synthesis), AMPT (inhibitor of catecholamine synthesis) and sulpiride (selective D2 receptor antagonist), but not DSP-4 (noradrenergic neurotoxin), blocked the antidepressant actions of AcOEt and BuOH. In conclusion, AcOEt and BuOH fractions shared with AE similar phytochemical composition and antidepressant actions. Preserved 5-HT and dopamine transmissions were required for the antidepressant effects of P. edulis fractions.
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Affiliation(s)
- Adriana S F S J Ayres
- Laboratório de Farmacologia Comportamental, Dept. de Biofísica e Farmacologia, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | - Wilton B Santos
- Laboratório de Farmacologia Comportamental, Dept. de Biofísica e Farmacologia, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | - Décio D Junqueira-Ayres
- Laboratório de Farmacologia Comportamental, Dept. de Biofísica e Farmacologia, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | - Geison M Costa
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Freddy A Ramos
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Leonardo Castellanos
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Jovelina S F Alves
- Laboratório de Farmacognosia, Departamento de Farmácia, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | - Laila Asth
- Laboratório de Farmacologia Comportamental, Dept. de Biofísica e Farmacologia, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | - Iris U de Medeiros
- Laboratório de Farmacologia Comportamental, Dept. de Biofísica e Farmacologia, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | - Silvana M Zucolotto
- Laboratório de Farmacognosia, Departamento de Farmácia, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | - Elaine C Gavioli
- Laboratório de Farmacologia Comportamental, Dept. de Biofísica e Farmacologia, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil.
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Leal A, Rojas JL, Valencia-Islas NA, Castellanos L. New β-orcinol depsides from Hypotrachyna caraccensis, a lichen from the páramo ecosystem and their free radical scavenging activity. Nat Prod Res 2017; 32:1375-1382. [DOI: 10.1080/14786419.2017.1346639] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Angela Leal
- Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Química, Bogotá, Colombia
| | - José L. Rojas
- Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Química, Bogotá, Colombia
| | - Norma A. Valencia-Islas
- Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Farmacia, Bogotá, Colombia
| | - Leonardo Castellanos
- Universidad Nacional de Colombia - Sede Bogotá - Facultad de Ciencias - Departamento de Química, Bogotá, Colombia
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Betancur LA, Naranjo-Gaybor SJ, Vinchira-Villarraga DM, Moreno-Sarmiento NC, Maldonado LA, Suarez-Moreno ZR, Acosta-González A, Padilla-Gonzalez GF, Puyana M, Castellanos L, Ramos FA. Marine Actinobacteria as a source of compounds for phytopathogen control: An integrative metabolic-profiling / bioactivity and taxonomical approach. PLoS One 2017; 12:e0170148. [PMID: 28225766 PMCID: PMC5321270 DOI: 10.1371/journal.pone.0170148] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [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: 09/19/2016] [Accepted: 12/29/2016] [Indexed: 11/30/2022] Open
Abstract
Marine bacteria are considered as promising sources for the discovery of novel biologically active compounds. In this study, samples of sediment, invertebrate and algae were collected from the Providencia and Santa Catalina coral reef (Colombian Caribbean Sea) with the aim of isolating Actinobateria-like strain able to produce antimicrobial and quorum quenching compounds against pathogens. Several approaches were used to select actinobacterial isolates, obtaining 203 strains from all samples. According to their 16S rRNA gene sequencing, a total of 24 strains was classified within Actinobacteria represented by three genera: Streptomyces, Micromonospora, and Gordonia. In order to assess their metabolic profiles, the actinobacterial strains were grown in liquid cultures, and LC-MS-based analyses from ethyl acetate fractions were performed. Based on taxonomical classification, screening information of activity against phytopathogenic strains and quorum quenching activity, as well as metabolic profiling, six out of the 24 isolates were selected for follow-up with chemical isolation and structure identification analyses of putative metabolites involved in antimicrobial activities.
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Affiliation(s)
- Luz A. Betancur
- Universidad Nacional de Colombia, Sede Bogotá, Departamento de Química, Carrera, Edificio de Química of 427, Bogotá, Colombia
- Universidad de Caldas. Departamento de Química. Edificio Orlando Sierra, Bloque B, Sede Palogrande Calle. Manizales, Caldas, Colombia
| | - Sandra J. Naranjo-Gaybor
- Universidad Nacional de Colombia, Sede Bogotá, Departamento de Química, Carrera, Edificio de Química of 427, Bogotá, Colombia
- Universidad de las Fuerzas Armadas, ESPE Carrera de Ingeniería Agropecuaria IASA II Av. General Rumiñahui s/n, Sangolquí- Ecuador
| | - Diana M. Vinchira-Villarraga
- Universidad Nacional de Colombia, Sede Bogotá, Departamento de Química, Carrera, Edificio de Química of 427, Bogotá, Colombia
| | - Nubia C. Moreno-Sarmiento
- Universidad Nacional de Colombia, Sede Bogotá, Departamento de Química, Carrera, Edificio de Química of 427, Bogotá, Colombia
| | - Luis A. Maldonado
- Universidad Autónoma Metropolitana Rectoría—Secretaría General, Prolongación Canal de Miramontes, Col. Ex-hacienda San Juan de Dios, Tlalpan, México DF
| | - Zulma R. Suarez-Moreno
- Investigación y Desarrollo, Empresa Colombiana de Productos Veterinarios VECOL S.A., Bogotá D.C
| | | | - Gillermo F. Padilla-Gonzalez
- Universidade de São Paulo, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Av. do de Sao Paulo, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Av. do Café, Ribeirão Preto–SP, Brazil
| | - Mónica Puyana
- Departamento de Ciencias Biológicas y Ambientales, Programa de Biología Marina, Universidad Jorge Tadeo Lozano, Carrera, Modulo, Oficina, Bogotá, Colombia
| | - Leonardo Castellanos
- Universidad Nacional de Colombia, Sede Bogotá, Departamento de Química, Carrera, Edificio de Química of 427, Bogotá, Colombia
| | - Freddy A. Ramos
- Universidad Nacional de Colombia, Sede Bogotá, Departamento de Química, Carrera, Edificio de Química of 427, Bogotá, Colombia
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Pinzón-Espinosa A, Martinez-Matamoros D, Castellanos L, Duque C, Rodríguez J, Jiménez C, Ramos FA. Cereusitin A, a cyclic tetrapeptide from a Bacillus cereus strain isolated from the soft coral Antillogorgia (syn. Pseudopterogorgia) elisabethae. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.01.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Amaya García F, Sanchez Nuñez ML, Ramos FA, Puyana M, Nunes de Palmer Paixão IC, Teixeira VL, Castellanos L. Dolabellane diterpenes from the Caribbean soft corals Eunicea laciniata and Eunicea asperula and determination of their anti HSV-1 activity. Rev colomb quim 2017. [DOI: 10.15446/rev.colomb.quim.v46n1.62830] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Los dolabellanos son diterpenos con importante actividad antiviral, la mayor parte de los estudios se han realizado con compuestos aislados de algas pardas del género Dictyota. Los corales blandos son también una importante fuente de dolabellanos, pero el potencial antiviral de éstos ha sido muy poco estudiado. Como parte de nuestra búsqueda de compuestos bioactivos a partir de fuentes marinas, se llevó a cabo el estudio químico de los dolabellanos presentes en los octocorales Eunicea laciniata y Eunicea asperula, recolectados en Santa Marta, Caribe colombiano. Los dolabellanos 1-6 fueron aislados del octocoral E. laciniata mientras que en E. asperula se encontraron los compuestos 2, 4 y 5. La elucidación estructural se llevó a cabo mediante experimentos de RMN, espectrometría de masas, rotación óptica y posterior comparación con reportes previos en la literatura. El análisis por CG-EM evidenció que la dolabellatrienona (2) se puede transformar en los compuestos 4 y 5 como producto del almacenamiento prolongado, no obstante, tales compuestos también estuvieron presentes en los extractos de los organismos estudiados. El compuesto 6 inhibió la replicación del VHS-1 (73,7% de inhibición en células infectadas a una concentración de 50 μM) sin efecto citotóxico (CC50 = 959), mostrando una citotoxicidad similar al Aciclovir®, un control positivo, por lo cual se perfila como un candidato para la realización de estudios adicionales sobre el potencial de los dolabellanos como agentes antivirales.
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Ullrich SF, Averesch NJH, Castellanos L, Choi YH, Rothauer A, Kayser O. Discrimination of wild types and hybrids of Duboisia myoporoides and Duboisia leichhardtii at different growth stages using 1H NMR-based metabolite profiling and tropane alkaloids-targeted HPLC-MS analysis. Phytochemistry 2016; 131:44-56. [PMID: 27567452 DOI: 10.1016/j.phytochem.2016.08.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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: 04/14/2016] [Revised: 08/11/2016] [Accepted: 08/16/2016] [Indexed: 06/06/2023]
Abstract
Duboisia species, which belong to the family of Solanaceae, are commercially cultivated in large scale, as they are main source of the pharmaceutically-used active compound scopolamine. In this study, 1H NMR-based metabolite profiling linking primary with secondary metabolism and additional quantification via HPCL-MS with special focus on the tropane alkaloids were applied to compare leaf and root extracts of three wild types and two hybrids of Duboisia myoporoides and D. leichhardtii at different developmental stages grown under controlled conditions in climate chambers and under agricultural field plantation. Based on the leaf extracts, a clear distinction between the Duboisia hybrids and the wild types Duboisia myoporoides and D. leichhardtii using principal component analysis of 1H NMR data was observed. The average content in scopolamine in the hybrids of Duboisia cultivated in climate chambers increased significantly from month 3-6 after potting of the rooted cuttings, however not so for the examined wild types. The Duboisia hybrids grown in climate chambers showed higher growth and contained more sugars and amino acids than Duboisia hybrids grown in the field, which in contrast showed an enhanced flux towards tropane alkaloids as well as flavonoids. For a more detailed analysis of tropane alkaloids, an appropriate HPLC-MS method was developed and validated. The measurements revealed large differences in the alkaloid pattern within the different genotypes under investigation, especially regarding the last enzymatic step, the conversion from hyoscamine to scopolamine by the hyoscyamine 6β-hydroxylase. Scopolamine was found in highest concentrations in Duboisia hybrids (20.04 ± 4.05 and 17.82 ± 3.52 mg/g dry wt) followed by Duboisia myoporoides (12.71 ± 2.55 mg/g dry wt), both showing a high selectivity for scopolamine in contrast to Duboisia leichhardtii (3.38 ± 0.59 and 5.09 ± 1.24 mg/g dry wt) with hyoscyamine being the predominant alkaloid.
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Affiliation(s)
- Sophie Friederike Ullrich
- Boehringer Ingelheim Pharma GmbH und Co. KG, Binger Str. 173, 55216, Ingelheim am Rhein, Germany; Department of Technical Biochemistry, Technical University of Dortmund, Emil-Figge-Str. 66, 44227, Dortmund, Germany
| | - Nils J H Averesch
- Centre for Microbial Electrochemical Systems (CEMES), University of Queensland, Gehrmann Laboratories Building (60), Brisbane, QLD, 4072, Australia
| | - Leonardo Castellanos
- Natural Products Laboratory, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands
| | - Young Hae Choi
- Natural Products Laboratory, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands
| | - Andreas Rothauer
- Boehringer Ingelheim Pharma GmbH und Co. KG, Binger Str. 173, 55216, Ingelheim am Rhein, Germany
| | - Oliver Kayser
- Department of Technical Biochemistry, Technical University of Dortmund, Emil-Figge-Str. 66, 44227, Dortmund, Germany.
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Costa GM, Gazola AC, Zucolotto SM, Castellanos L, Ramos FA, Reginatto FH, Schenkel EP. Chemical profiles of traditional preparations of four South American Passiflora species by chromatographic and capillary electrophoretic techniques. Revista Brasileira de Farmacognosia 2016. [DOI: 10.1016/j.bjp.2016.02.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Ayres AS, de Araújo LL, Soares TC, Costa GM, Reginatto FH, Ramos FA, Castellanos L, Schenkel EP, Soares-Rachetti VP, Zucolotto SM, Gavioli EC. Comparative central effects of the aqueous leaf extract of two populations of Passiflora edulis. Revista Brasileira de Farmacognosia 2015. [DOI: 10.1016/j.bjp.2015.06.007] [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] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Quintana J, Bayona LM, Castellanos L, Puyana M, Camargo P, Aristizábal F, Edwards C, Tabudravu JN, Jaspars M, Ramos FA. Almiramide D, cytotoxic peptide from the marine cyanobacterium Oscillatoria nigroviridis. Bioorg Med Chem 2015; 22:6789-95. [PMID: 25468043 DOI: 10.1016/j.bmc.2014.10.039] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 10/18/2014] [Accepted: 10/29/2014] [Indexed: 11/18/2022]
Abstract
Marine benthic cyanobacteria are widely known as a source of toxic and potentially useful compounds.These microorganisms have been studied from many Caribbean locations, which recently include locations in the Colombian Caribbean Sea. In the present study, six lipopeptides named almiramides D to H, together with the known almiramide B are identified from a mat characterized as Oscillatoria nigroviridis collected at the Island of Providence (Colombia, S.W. Caribbean Sea). The most abundant compounds, almiramides B and D were characterized by NMR and HRESIMS, while the structures of the minor compounds almiramides E to H were proposed by the analysis of their HRESIMS and MS2 spectra. Almiramides B and D were tested against six human cell lines including a gingival fibroblast cell line and five human tumor cell lines (A549, MDA-MB231, MCF-7, HeLa and PC3) showing a strong but not selective toxicity.
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Quintana J, Brango-Vanegas J, M. Costa G, Castellanos L, Arévalo C, Duque C. Marine organisms as source of extracts to disrupt bacterial communication: bioguided isolation and identification of quorum sensing inhibitors from Ircinia felix. Revista Brasileira de Farmacognosia 2015. [DOI: 10.1016/j.bjp.2015.03.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Toro RM, Aragón DM, Ospina LF, Ramos FA, Castellanos L. Phytochemical Analysis, Antioxidant and Anti-Inflammatory Activity of Calyces from Physalis peruviana. Nat Prod Commun 2014. [DOI: 10.1177/1934578x1400901111] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [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] Open
Abstract
Physalis peruviana calyces are used extensively in folk medicine. The crude ethanolic extract and some fractions of calyces were evaluated in order to explore antioxidant and anti-inflammatory activities. The anti-inflammatory activity was evaluated by the TPA-induced ear edema model. The antioxidant in vitro activity was measured by means of the superoxide and nitric oxide scavenging activity of the extracts and fractions. The butanolic fraction was found to be promising due to its anti-inflammatory and antioxidant activities. Therefore, a bio-assay guided approach was employed to isolate and identify rutin (1) and nicotoflorin (2) from their NMR spectroscopic and MS data. The identification of rutin in calyces of P. peruviana supports the possible use of this waste material for phytotherapeutic, nutraceutical and cosmetic preparations.
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Affiliation(s)
- Reina M. Toro
- Departamento de Farmacia, Universidad Nacional de Colombia, Bogotá D.C., Colombia
| | - Diana M. Aragón
- Departamento de Farmacia, Universidad Nacional de Colombia, Bogotá D.C., Colombia
| | - Luis F. Ospina
- Departamento de Farmacia, Universidad Nacional de Colombia, Bogotá D.C., Colombia
| | - Freddy A. Ramos
- Departamento de Química, Universidad Nacional de Colombia, Bogotá D.C., Colombia
| | - Leonardo Castellanos
- Departamento de Química, Universidad Nacional de Colombia, Bogotá D.C., Colombia
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Toro RM, Aragón DM, Ospina LF, Ramos FA, Castellanos L. Phytochemical analysis, antioxidant and anti-inflammatory activity of calyces from Physalis peruviana. Nat Prod Commun 2014; 9:1573-1575. [PMID: 25532284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023] Open
Abstract
Physalis peruviana calyces are used extensively in folk medicine. The crude ethanolic extract and some fractions of calyces were evaluated in order to explore antioxidant and anti-inflammatory activities. The anti-inflammatory activity was evaluated by the TPA-induced ear edema model. The antioxidant in vitro activity was measured by means of the superoxide and nitric oxide scavenging activity of the extracts and fractions. The butanolic fraction was found to be promising due to its anti-inflammatory and antioxidant activities. Therefore, a bio-assay guided approach was employed to isolate and identify rutin (1) and nicotoflorin (2) from their NMR spectroscopic and MS data. The identification of rutin in calyces of P. peruviana supports the possible use of this waste material for phytotherapeutic, nutraceutical and cosmetic preparations.
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Pardo-Vargas A, de Barcelos Oliveira I, Stephens PRS, Cirne-Santos CC, de Palmer Paixão ICN, Ramos FA, Jiménez C, Rodríguez J, Resende JALC, Teixeira VL, Castellanos L. Dolabelladienols A-C, new diterpenes isolated from Brazilian brown alga Dictyota pfaffii. Mar Drugs 2014; 12:4247-59. [PMID: 25056631 PMCID: PMC4113826 DOI: 10.3390/md12074247] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [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: 03/31/2014] [Revised: 06/27/2014] [Accepted: 06/30/2014] [Indexed: 11/16/2022] Open
Abstract
The marine brown alga Dictyota pfaffii from Atol das Rocas, in Northeast Brazil is a rich source of dolabellane diterpene, which has the potential to be used in future antiviral drugs by inhibiting reverse transcriptase (RT) of HIV-1. Reexamination of the minor diterpene constituents yielded three new dolabellane diterpenes, (1R*,2E,4R*,7S,10S*,11S*,12R*)10,18-diacetoxy-7-hydroxy-2,8(17)-dolabelladiene (1), (1R*,2E,4R*,7R*,10S*,11S*,12R*)10,18-diacetoxy-7-hydroxy-2,8(17)-dolabelladiene (2), (1R*,2E,4R*,8E,10S*,11S,12R*)10,18-diacetoxy-7-hydroxy-2,8-dolabelladiene (3), termed dolabelladienols A-C (1-3) respectively, in addition to the known dolabellane diterpenes (4-6). The elucidation of the compounds 1-3 was assigned by 1D and 2D NMR, MS, optical rotation and molecular modeling, along with the relative configuration of compound 4 and the absolute configuration of 5 by X-ray diffraction. The potent anti-HIV-1 activities displayed by compounds 1 and 2 (IC50 = 2.9 and 4.1 μM), which were more active than even the known dolabelladienetriol 4, and the low cytotoxic activity against MT-2 lymphocyte tumor cells indicated that these compounds are promising anti-HIV-1 agents.
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Affiliation(s)
- Alonso Pardo-Vargas
- Departamento de Química, Universidad Nacional de Colombia, Cra. 30 N° 45-03, Bogotá D.C., Colombia.
| | - Ingrid de Barcelos Oliveira
- Laboratório de Imunologia Clínica, Departamento de Imunologia, Instituto Oswaldo Cruz/FIOCRUZ, Av. Brasil 4365, Manguinhos, Pavilhão Leônidas Deane/409, Rio de Janeiro 21045-900, RJ, Brazil.
| | - Paulo Roberto Soares Stephens
- Laboratório de Imunologia Clínica, Departamento de Imunologia, Instituto Oswaldo Cruz/FIOCRUZ, Av. Brasil 4365, Manguinhos, Pavilhão Leônidas Deane/409, Rio de Janeiro 21045-900, RJ, Brazil.
| | - Claudio Cesar Cirne-Santos
- Laboratório de Imunologia Clínica, Departamento de Imunologia, Instituto Oswaldo Cruz/FIOCRUZ, Av. Brasil 4365, Manguinhos, Pavilhão Leônidas Deane/409, Rio de Janeiro 21045-900, RJ, Brazil.
| | - Izabel Christina Nunes de Palmer Paixão
- Laboratório de Virologia Molecular e Biotecnologia Marinha, Programa de Pós-graduação em Ciências e Biotecnologia, Departamento de Biologia Celular e Molecular, Instituto de Biologia, Universidade Federal Fluminense, Niterói 24020-141, RJ, Brazil.
| | - Freddy Alejandro Ramos
- Departamento de Química, Universidad Nacional de Colombia, Cra. 30 N° 45-03, Bogotá D.C., Colombia.
| | - Carlos Jiménez
- Departamento de Química Fundamental, Facultade de Ciencias and Centro de Investigaciones Científicas Avanzadas (CICA) Universidade da Coruña, 15071 A Coruña, Spain.
| | - Jaime Rodríguez
- Departamento de Química Fundamental, Facultade de Ciencias and Centro de Investigaciones Científicas Avanzadas (CICA) Universidade da Coruña, 15071 A Coruña, Spain.
| | | | - Valeria Laneuville Teixeira
- Laboratório Algamar, Departmento de Biologia Marinha, Instituto de Biologia, Universidade Federal Fluminense, Niterói 24020-141, RJ, Brazil.
| | - Leonardo Castellanos
- Departamento de Química, Universidad Nacional de Colombia, Cra. 30 N° 45-03, Bogotá D.C., Colombia.
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Abstract
Two new oleanane-type triterpenes, characterized as 3-oxo-11α,12α-epoxy-oleanan-28,13β- olide and 3-oxo-olean-11-en-28,13β-olide , were isolated from the fruits and seeds of Cedrela montana (Meliaceae). In addition, the known compounds oleanonic acid , a mixture of β-sitosterol and stigmasterol, and the limonoid photogedunin were also isolated. The structures of the new compounds were established by spectroscopic methods, including 2D NMR.
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Affiliation(s)
- Leonardo Castellanos
- Departamento de Química, Universidad Nacional de Colombia, Ciudad Universitaria, Santa Fé de Bogotá
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Reina E, Ramos FA, Castellanos L, Aragón M, Ospina LF. Anti-inflammatory R-prostaglandins from Caribbean Colombian soft coral Plexaura homomalla. ACTA ACUST UNITED AC 2014; 65:1643-52. [PMID: 24118067 DOI: 10.1111/jphp.12138] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [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: 03/04/2013] [Accepted: 08/02/2013] [Indexed: 12/13/2022]
Abstract
OBJECTIVES This study aims to evaluate the effect of prostaglandins isolated from soft coral Plexaura homomalla, collected in Colombian Caribbean Sea, on in vivo and in vitro inflammation models. METHODS Extracts from P. homomalla were fractionated and sequentially chromatographed to obtain the prostaglandins: (15R)-PGA2 (1), (15R)-PGA2 -Me (2), (15R)-O-Ac-PGA2 (3), (15R)-O-Ac-PGA2 -Me (4) and (15R)-PGE2 (5) in addition to three semi-synthetic prostaglandins obtained by transformations of the natural products. The anti-inflammatory properties of natural and semi-synthetic compounds were determined in vivo using 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced mouse ear oedema model and in vitro leucocyte degranulation, myeloperoxidase (MPO) and elastase enzymatic activities from human polymorphonuclear cells (PMNs). The cell viability was evaluated by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. KEY FINDINGS In the in vivo assay, (15R)-PGE2 (1) and (15R)-O-Ac-PGA2 (3) showed anti-inflammatory activity, as well as in vitro inhibition of elastase release from PMNs. In the PMNs degranulation assay, (15R)-PGE2 (5), was the most active compound in the inhibition of MPO release. Finally, all the tested prostaglandins showed moderate inhibition for elastase enzyme activity, whereas none of the prostaglandins exhibit significative inhibition on MPO activity. CONCLUSION (15R)-PGE2 (1) and (15R)-O-Ac-PGA2 (3) present significant inhibition on three important events related to the topical inflammatory response induced by TPA: the oedema formation, the PMNs degranulation, events that modulate MPO and elastase levels at inflammation site, and the inhibition of the enzyme activity.
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Affiliation(s)
- Eduardo Reina
- Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Bogotá, AA, Colombia
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Brango-Vanegas J, Costa GM, Ortmann CF, Schenkel EP, Reginatto FH, Ramos FA, Arévalo-Ferro C, Castellanos L. Glycosylflavonoids from Cecropia pachystachya Trécul are quorum sensing inhibitors. Phytomedicine 2014; 21:670-675. [PMID: 24548722 DOI: 10.1016/j.phymed.2014.01.001] [Citation(s) in RCA: 23] [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] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Revised: 10/16/2013] [Accepted: 01/11/2014] [Indexed: 06/03/2023]
Abstract
The Cecropia genus is widely distributed in Latin America including at least 60 species, and some of them are commonly used in traditional medicine for the treatment of several diseases. We used Cecropia pachystachya Trécul to search for quorum sensing (QS) inhibitors compounds and found that the aqueous extract of C. pachystachya leaves is a promising source of substances with this activity. Using as biosensor Chromobacterium violaceum ATCC 31532 and Escherichia coli pSB403, the compounds chlorogenic acid (2), isoorientin (3), orientin (4), isovitexin (6), vitexin (7), and rutin (9) were identified as QS inhibitors. None of these compounds inhibited the growth of neither the used biosensors nor the microorganisms Staphylococcus aureus ATCC 23591, Escherichia coli ATCC 25922 and Saccharomyces cerevisiae, used here as growth inhibition controls. Along with the rutin, here we presented for the first time the QS-inhibition potential of the C-glycosyl flavonoids. The prospective of this evidence lead to the use of these compounds as antipathogenic drugs or antifoulants.
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Affiliation(s)
- J Brango-Vanegas
- Departamento de Química, Universidad Nacional de Colombia, Ciudad Universitaria, edificio 451, Carrera 30 N° 45-03, Bogotá, Colombia
| | - G M Costa
- Departamento de Química, Universidad Nacional de Colombia, Ciudad Universitaria, edificio 451, Carrera 30 N° 45-03, Bogotá, Colombia; Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Campus Universitário, Trindade, CEP 88040-970, Florianópolis, SC, Brazil
| | - C F Ortmann
- Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Campus Universitário, Trindade, CEP 88040-970, Florianópolis, SC, Brazil
| | - E P Schenkel
- Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Campus Universitário, Trindade, CEP 88040-970, Florianópolis, SC, Brazil
| | - F H Reginatto
- Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Campus Universitário, Trindade, CEP 88040-970, Florianópolis, SC, Brazil
| | - F A Ramos
- Departamento de Química, Universidad Nacional de Colombia, Ciudad Universitaria, edificio 451, Carrera 30 N° 45-03, Bogotá, Colombia
| | - C Arévalo-Ferro
- Departamento de Biología, Universidad Nacional de Colombia, Ciudad Universitaria, edificio 221, Carrera 30 N° 45-03, Bogotá, Colombia
| | - L Castellanos
- Departamento de Química, Universidad Nacional de Colombia, Ciudad Universitaria, edificio 451, Carrera 30 N° 45-03, Bogotá, Colombia.
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Ruiz C, Valderrama K, Zea S, Castellanos L. Mariculture and natural production of the antitumoural (+)-discodermolide by the Caribbean marine sponge Discodermia dissoluta. Mar Biotechnol (NY) 2013; 15:571-583. [PMID: 23728846 DOI: 10.1007/s10126-013-9510-7] [Citation(s) in RCA: 20] [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] [Subscribe] [Scholar Register] [Received: 10/27/2012] [Accepted: 03/26/2013] [Indexed: 06/02/2023]
Abstract
Biotechnological research on marine organisms, such as ex situ or in situ aquaculture and in vitro cell culture, is being conducted to produce bioactive metabolites for biomedical and industrial uses. The Caribbean marine sponge Discodermia dissoluta is the source of (+)-discodermolide, a potent antitumoural polyketide that has reached clinical trials. This sponge usually lives at depths greater than 30 m, but at Santa Marta (Colombia) there is a shallower population, which has made it logistically possible to investigate for the first time, on ways to supply discodermolide. We thus performed in situ, 6-month fragment culture trials to assess the performance of this sponge in terms of growth and additional discodermolide production and studied possible factors that influence the variability of discodermolide concentrations in the wild. Sponge fragments cultured in soft mesh bags suspended from horizontal lines showed high survivorship (93 %), moderate growth (28 % increase in volume) and an overall rise (33 %) in the discodermolide concentration, equivalent to average additional production of 8 μg of compound per millilitre of sponge. The concentration of discodermolide in wild sponges ranged from 8 to 40 μg mL(-1). Locality was the only factor related to discodermolide variation in the wild, and there were greater concentrations in peripheral vs. basal portions of the sponge, and in clean vs. fouled individuals. As natural growth and regeneration rates can be higher than culture growth rates, there is room for improving techniques to sustainably produce discodermolide.
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Affiliation(s)
- Cesar Ruiz
- Instituto de Investigaciones Marinas y Costeras-INVEMAR, Calle 25 2-55, Rodadero Sur - Playa Salguero, Santa Marta, Colombia
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Costa GM, Gazola AC, Madóglio FA, Zucolotto SM, Reginatto FH, Castellanos L, Ramos FA, Duque C, Schenkel EP. VITEXIN DERIVATIVES AS CHEMICAL MARKERS IN THE DIFFERENTIATION OF THE CLOSELY RELATED SPECIES PASSIFLORA ALATA CURTIS AND PASSIFLORA QUADRANGULARIS LINN. J LIQ CHROMATOGR R T 2013. [DOI: 10.1080/10826076.2012.695316] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Geison M. Costa
- a Programa de Pós-graduação em Farmácia , Universidade Federal de Santa Catarina , Florianópolis , Brazil
- c Departamento de Química , Universidad Nacional de Colombia , Bogotá , Colombia
| | - Andressa C. Gazola
- a Programa de Pós-graduação em Farmácia , Universidade Federal de Santa Catarina , Florianópolis , Brazil
| | - Fernanda A. Madóglio
- a Programa de Pós-graduação em Farmácia , Universidade Federal de Santa Catarina , Florianópolis , Brazil
| | - Silvana M. Zucolotto
- b Departamento de Farmácia, Centro de Ciências da Saúde , Universidade Federal do Rio Grande do Norte , Natal , Brazil
| | - Flávio H. Reginatto
- a Programa de Pós-graduação em Farmácia , Universidade Federal de Santa Catarina , Florianópolis , Brazil
| | - Leonardo Castellanos
- c Departamento de Química , Universidad Nacional de Colombia , Bogotá , Colombia
| | - Freddy A. Ramos
- c Departamento de Química , Universidad Nacional de Colombia , Bogotá , Colombia
| | - Carmenza Duque
- c Departamento de Química , Universidad Nacional de Colombia , Bogotá , Colombia
| | - Eloir P. Schenkel
- a Programa de Pós-graduação em Farmácia , Universidade Federal de Santa Catarina , Florianópolis , Brazil
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Cuadrado-Silva CT, Castellanos L, Arévalo-Ferro C, Osorno OE. Detection of quorum sensing systems of bacteria isolated from fouled marine organisms. BIOCHEM SYST ECOL 2013. [DOI: 10.1016/j.bse.2012.09.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Tello E, Castellanos L, Arévalo-Ferro C, Duque C. Disruption in quorum-sensing systems and bacterial biofilm inhibition by cembranoid diterpenes isolated from the octocoral Eunicea knighti. J Nat Prod 2012; 75:1637-1642. [PMID: 22905751 DOI: 10.1021/np300313k] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Three new cembranoid diterpenes, knightine (1), 11(R)-hydroxy-12(20)-en-knightal (2), and 11(R)-hydroxy-12(20)-en-knightol acetate (3), were isolated as minor constituents of the Caribbean gorgonian Eunicea knighti, along with the known cembranoids 4-8. The stereostructures of the new compounds were determined by detailed spectroscopic analyses and a combination of chemical transformations and modified Mosher's methods. All isolated cembranoids were tested against fouling using a quorum-sensing inhibition (QSI) assay and a biofilm inhibition test. Compounds 2, 3, and 6 disrupted QS systems at lower concentrations than kojic acid and Cu(2)O, and in most cases cembranoids 1-8 showed bacterial biofilm inhibition at lower concentrations than kojic acid.
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Affiliation(s)
- Edisson Tello
- Departamento de Química, Universidad Nacional de Colombia, AA 14490, Bogotá, Colombia
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Zucolotto SM, Fagundes C, Reginatto FH, Ramos FA, Castellanos L, Duque C, Schenkel EP. Analysis of C-glycosyl flavonoids from South American Passiflora species by HPLC-DAD and HPLC-MS. Phytochem Anal 2012; 23:232-239. [PMID: 21858882 DOI: 10.1002/pca.1348] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2011] [Revised: 06/22/2011] [Accepted: 06/27/2011] [Indexed: 05/31/2023]
Abstract
INTRODUCTION Leaves and fruits of Passiflora species are widely used around the world in popular medicine, mainly as sedatives and tranquilisers. C-glycosyl flavonoids are the main components of these species. OBJECTIVE To investigate the constituent patterns and to develop a chromatographic method for the characterisation of the C-glycosyl flavonoids profile of the extracts of the leaves and the pericarp of South American Passiflora species. METHODOLOGY The chemical composition of extracts from the leaves and the fruits' pericarp of Passiflora edulis var. flavicarpa, P. edulis var. edulis, Passiflora alata, Passiflora tripartita var. mollissima, Passiflora quadrangularis, Passiflora manicata and Passiflora ligularis was evaluated for the presence of C-glycosyl flavonoids. Two separate HPLC methods were developed suitable for a diode array detector (DAD) and a MS detector. Separation by HPLC-DAD was achieved on a Luna C-18 column, using solvent A (tetrahydrofuran-isopropanol-acetonitrile) and solvent B (H₃PO₄ 0.5%) in an isocratic elution mode. In the HPLC-MS, the components were separated on a Luna RP-18A column by a gradient elution (water-acetonitrile-formic acid). RESULTS The presence of C-glycosyl flavonoids was identified in leaves and pericarp of P. edulis var. flavicarpa, P. alata, P. edulis var. edulis and P. tripartita var. molissima, but only in leaf extracts of P. quadrangularis and P. manicata and not at all in P. ligularis. The different species and varieties showed different major constituents. The C-glycosyl flavonoids identified more frequently were orientin, isoorientin, vitexin and isovitexin. CONCLUSION The methods established are simple and can be used as a tool for the characterisation and quality control of pharmaceutical preparations containing these Passiflora extracts.
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Affiliation(s)
- Silvana Maria Zucolotto
- Programa de Pós-Graduação em Farmácia, Universidade Federal de Santa Catarina, Campus Universitário, Trindade, Florianópolis, SC 88.049-900, Brasil
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Calderón J, Ruiz N, Castellanos L. Within and between plant variation of 4β-hydroxiwithanolide E in cape gooseberry (Physalis peruviana; Solanaceae). BIOCHEM SYST ECOL 2012. [DOI: 10.1016/j.bse.2011.12.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Tello E, Castellanos L, Arevalo-Ferro C, Rodríguez J, Jiménez C, Duque C. Absolute stereochemistry of antifouling cembranoid epimers at C-8 from the Caribbean octocoral Pseudoplexaura flagellosa. Revised structures of plexaurolones. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.09.094] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Reina E, Puentes C, Rojas J, García J, Ramos FA, Castellanos L, Aragón M, Ospina LF. Fuscoside E: A strong anti-inflammatory diterpene from Caribbean octocoral Eunicea fusca. Bioorg Med Chem Lett 2011; 21:5888-91. [DOI: 10.1016/j.bmcl.2011.07.092] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2011] [Revised: 07/23/2011] [Accepted: 07/25/2011] [Indexed: 12/20/2022]
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Echigo S, Castellanos L, Duque C, Uekusa H, Hara N, Fujimoto Y. C-24 stereochemistry of marine Sterols: (22E)-24-Ethyl-24-methylcholesta-5,22-dien-3b-oβl and 24-Ethyl-24-methylcholest-5-en-3β-ol. J BRAZIL CHEM SOC 2011. [DOI: 10.1590/s0103-50532011000500026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Malo JL, Cardinal S, Ghezzo H, L'Archevêque J, Castellanos L, Maghni K. Association of bronchial reactivity to occupational agents with methacholine reactivity, sputum cells and immunoglobulin E-mediated reactivity. Clin Exp Allergy 2010; 41:497-504. [PMID: 21114694 DOI: 10.1111/j.1365-2222.2010.03659.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Bronchial responsiveness and IgE-mediated reactivity are associated with specific bronchial reactivity to allergens. OBJECTIVE Our aim was to examine whether airway inflammation also plays a role. METHODS Retrospective analysis of all subjects who underwent specific inhalation challenges in the investigation of occupational asthma (OA) since 2000. Responsiveness to methacholine (PC(20) ) and levels of eosinophils and neutrophils in induced sputum on the control day were associated with the presence of OA (positive-specific inhalation challenge). In a sample of subjects exposed to wheat flour, we also examined the role of specific IgE- mediated reactivity (skin reactivity, specific IgE). RESULTS PC(20) level was significantly more often normal in subjects with OA (35 of 129, 27% instances) by comparison with non-OA (15 of 189, 8% instances), but the positive predictive value of responsiveness to methacholine for OA was low (35%). Coupling information on the level of eosinophils to responsiveness to methacholine increased positive predictive values for OA from 39% to 69% depending on the thresholds used. The best balance of positive (69%) and negative (60%) predictive values was obtained in the case of normal PC(20) and eosinophils ≥3%. In a multivariate analysis carried out in 34 subjects exposed to wheat flour, responsiveness to methacholine, sputum eosinophils, skin weal size and levels of specific IgE were all significantly associated with OA to wheat flour. CONCLUSION AND CLINICAL RELEVANCE Information on the level of sputum eosinophils in addition to PC(20) provides a better association with OA vs. non-OA when PC(20) is normal. Levels of sputum eosinophils in addition to PC(20) and IgE-mediated reactivity increase the likelihood of OA due to wheat flour.
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Affiliation(s)
- J-L Malo
- Axe de recherche en santé respiratoire, Hôpital du Sacré-Cœur de Montréal, and Université de Montréal, Montreal, Canada.
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Valderrama K, Castellanos L, Zea S. Validation and evaluation of an HPLC methodology for the quantification of the potent antimitotic compound (+)-discodermolide in the Caribbean marine sponge Discodermia dissoluta. J Sep Sci 2010; 33:2316-21. [DOI: 10.1002/jssc.200900852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Abstract
BACKGROUND Workers exposed to chlorine may be at risk of deterioration in FEV1. METHODS A prospective study of 72 workers examined over a 5.8 +/- 1.9 year period. A sample of induced sputum for cells and mediators was obtained in 69 subjects at baseline (Vb) and in 36 both at Vb and at follow-up (Vf). RESULTS Sixty-four workers (89%) experienced at least one accidental inhalation of chlorine in the interval. The mean decrease in FEV1 was 30 ml/year and thus was within normal limits. Among the analysed remodelling markers, the level of the MMP-9-TIMP-1 complex, but not of free MMP-9 and TIMP-1, significantly diminished from Vb to Vf. We found significant correlations between neutrophils, IL-8, MMP-9 and MMP9-TIMP-1 complex at Vb and Vf. While levels of total glutathione, IL-8, MMP9, TIMP-1 and MMP9-TIMP-1 complex were highly correlated with each other at Vb, this was inconstant at Vf. Levels of MMP9-TIMP1 complex and of TIMP1 at Vf were significantly lower in workers reporting chlorine puffs with mild acute respiratory symptoms between visits compared to those who had no, or asymptomatic inhalations (P = 0.03 and 0.02, respectively). The fall in FEV1 from Vb to Vf was significantly correlated with levels of glutathione at Vb. Cough between visits was associated with a decrease in FEV1 (P = 0.06). CONCLUSION Although no accelerated loss in FEV1 was documented in these workers exposed to chlorine, subjects with a greater fall in FEV1 were more likely to report cough and have higher levels of total glutathione at Vb.
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Affiliation(s)
- K Maghni
- Axe de recherche en santé respiratoire, Department of ChestMedicine, Sacré-Coeur Hospital, 5400 West Gouin Blvd., Montreal, QC, Canada
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