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Santiago-Benítez AJ, Puerta A, Padrón JM, Norte M, Fernández JJ, Hernández Daranas A, Cen-Pacheco F. Antiproliferative effect of natural and semisynthetic polyethers from Laurencia viridis. Nat Prod Res 2023:1-7. [PMID: 37950735 DOI: 10.1080/14786419.2023.2280176] [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: 06/20/2023] [Accepted: 10/30/2023] [Indexed: 11/13/2023]
Abstract
Squalene-derived polyethers are a unique class of compounds that display a great diversity of structures and a broad array of bioactivities, among which its notable antiproliferative activity stands out against various types of cancer cell lines. In this study, eighteen triterpene squalene-derived polyethers, including twelve natural products and six synthetic derivatives, obtained from the red alga Laurencia viridis Gil-Rodríguez & Haroun were screened for their antiproliferative activity against six cancer cell lines: A549, HBL-100, HeLa, SW1573, T-47D, and WiDr; and a structure-activity relationship (SAR) study was established.
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Affiliation(s)
- Adrián J Santiago-Benítez
- Instituto Universitario de Bio-Orgánica Antonio González (IUBO-AG), Universidad de La Laguna, La Laguna, Spain
| | - Adrián Puerta
- Instituto Universitario de Bio-Orgánica Antonio González (IUBO-AG), Universidad de La Laguna, La Laguna, Spain
| | - José M Padrón
- Instituto Universitario de Bio-Orgánica Antonio González (IUBO-AG), Universidad de La Laguna, La Laguna, Spain
| | - Manuel Norte
- Instituto Universitario de Bio-Orgánica Antonio González (IUBO-AG), Universidad de La Laguna, La Laguna, Spain
- Departamento de Química Orgánica, Universidad de La Laguna, La Laguna, Spain
| | - José J Fernández
- Instituto Universitario de Bio-Orgánica Antonio González (IUBO-AG), Universidad de La Laguna, La Laguna, Spain
- Departamento de Química Orgánica, Universidad de La Laguna, La Laguna, Spain
| | | | - Francisco Cen-Pacheco
- Instituto Universitario de Bio-Orgánica Antonio González (IUBO-AG), Universidad de La Laguna, La Laguna, Spain
- Facultad de Bioanálisis, Veracruz University, Veracruz, Ver, México
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2
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Pereira RC, Nocchi N, Souto ML, Fernández JJ, Norte M, Duarte HM, Soares AR. The sea-hare Aplysia brasiliana promotes induction in chemical defense in the seaweed Laurencia dendroidea and in their congeneric neighbors. Plant Physiol Biochem 2020; 154:295-303. [PMID: 32590291 DOI: 10.1016/j.plaphy.2020.05.020] [Citation(s) in RCA: 3] [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: 02/26/2020] [Revised: 05/12/2020] [Accepted: 05/19/2020] [Indexed: 06/11/2023]
Abstract
Inducible chemical defenses are more common in temperate seaweeds than tropical ones, and are directly detected by increase of chemical contents, or indirectly by differential consumption of live seaweed tissues or artificial food with algal extracts by herbivores. In general, seaweed-induced chemical defense occur between 11 and 20 days after both simulated/artificial or direct herbivory. Here, we used experimental procedures to assess induced chemical defense in the tropical red seaweed Laurencia dendroidea as response to direct grazing, chemical cues from grazed conspecific neighbors and only presence of herbivores. Chemical defenses were analyzed by detecting the palatability of artificial food containing L. dendroidea extracts offered to Aplysia brasiliana and by comparative analyses of extracts from this seaweed by Gas Chromatography/Mass Spectroscopy, as well as metabolomic data analysis by Principal Component Analysis. Our results revealed that direct grazing by A. brasiliana induced a rapid (after 48 h) response among individuals of L. dendroidea, as did waterborne chemical cues from grazed conspecifics, but the presence of sea hare alone did not elicit a response. Increased resistance to grazing was accompanied by significative changes in sesquiterpene metabolomic chemical profile, revealing that induced defense: may be more widespread among seaweeds, independent of latitude; can involve changes in other classes of substances besides phlorotannins or not only the increase in the content of a single compound; and may be a rapid and ecologically coherent response to consumers. In addition, the importance of incorporating the metabolomic approach when examining inducible chemical defense in seaweeds is also emphasized.
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Affiliation(s)
- Renato C Pereira
- Universidade Federal Fluminense,Instituto de Biologia, Departamento de Biologia Marinha, Morro do Valonguinho s/n, 24020-141,Niterói, Brasil.
| | - Nathália Nocchi
- Universidade Federal Fluminense,Programa de Pós-graduação em Dinâmica dos Oceanos e da Terra, Avenida General Milton Tavares de Souza, Campus da Praia Vermelha, 24210-346, Niterói,Brasil; Grupo de Produtos Naturais de Organismos Aquáticos (GPNOA), NUPEM, Universidade Federal do Rio de Janeiro - Campus Professor Aloísio Teixeira, Av. São José do Barreto, 764, 27965 - 045, Macaé, RJ, Brasil
| | - María L Souto
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna (ULL), Avda. Astrofisico Francisco Sánchez 2, 38206, La Laguna, Tenerife, Spain
| | - José J Fernández
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna (ULL), Avda. Astrofisico Francisco Sánchez 2, 38206, La Laguna, Tenerife, Spain
| | - Manuel Norte
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna (ULL), Avda. Astrofisico Francisco Sánchez 2, 38206, La Laguna, Tenerife, Spain
| | - Heitor M Duarte
- Grupo de Produtos Naturais de Organismos Aquáticos (GPNOA), NUPEM, Universidade Federal do Rio de Janeiro - Campus Professor Aloísio Teixeira, Av. São José do Barreto, 764, 27965 - 045, Macaé, RJ, Brasil
| | - Angélica R Soares
- Grupo de Produtos Naturais de Organismos Aquáticos (GPNOA), NUPEM, Universidade Federal do Rio de Janeiro - Campus Professor Aloísio Teixeira, Av. São José do Barreto, 764, 27965 - 045, Macaé, RJ, Brasil
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3
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Franceschy C, Espinoza C, Padrón JM, Landa-Cadena G, Norte M, Fernández JJ, Shnyreva A, Trigos Á. Antiproliferative potential of 3β,5α,6β,7α-tetrahydroxyergosta-8(14),22-diene produced by Acremonium persicinum isolated from an alkaline crater lake in Puebla, Mexico. Nat Prod Res 2019; 35:2895-2898. [PMID: 31556322 DOI: 10.1080/14786419.2019.1669032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The sterol 3β,5α,6β,7α-tetrahydroxyergosta-8(14),22-diene was obtained from bio-guided fractioning of the chloroform extract of 50 L of liquid culture of Acremonium persicinum. This fungal strain was selected because of its anti-proliferative activity against solid human tumour cell lines (GI50 ≤ 50 μg/mL) in a bio-prospective study of fungi isolated from plant material, sediment and water samples obtained from alkaline lakes Alchichica and Atexcac in Puebla, Mexico. This compound showed GI50 (μM) values of: 16, 24, 18, 15 and 12 against tumour cell lines A-549, HBL-100, HeLa, T-47D and WiDr respectively. GI50 effects against tumour lines T-47D and WiDr were found to be greater than the clinically used drugs Etoposide and Cisplatin. Because of this, the results obtained support the pharmacological importance of the microorganisms that develop in these ecosystems and strengthen the non-invasive bio-prospection studies that our work group has developed in recent years.
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Affiliation(s)
- César Franceschy
- Doctorado en Ciencias en Ecología y Biotecnología, Instituto de Biotecnología y Ecología Aplicada (INBIOTECA), Universidad Veracruzana, Xalapa, Veracruz, México
| | - César Espinoza
- Centro de Investigación en Micología Aplicada, Universidad Veracruzana, Xalapa, Veracruz, México
| | - José M Padrón
- Instituto Universitario de Bio-Orgánica "Antonio González", Universidad de La Laguna, La Laguna, Spain
| | - Gandhi Landa-Cadena
- Centro de Investigación en Micología Aplicada, Universidad Veracruzana, Xalapa, Veracruz, México
| | - Manuel Norte
- Instituto Universitario de Bio-Orgánica "Antonio González", Universidad de La Laguna, La Laguna, Spain
| | - José J Fernández
- Instituto Universitario de Bio-Orgánica "Antonio González", Universidad de La Laguna, La Laguna, Spain
| | - Alla Shnyreva
- Faculty of Biology, Department of Mycology and Algology, Moscow State University, Moscow, Russia
| | - Ángel Trigos
- Doctorado en Ciencias en Ecología y Biotecnología, Instituto de Biotecnología y Ecología Aplicada (INBIOTECA), Universidad Veracruzana, Xalapa, Veracruz, México.,Centro de Investigación en Micología Aplicada, Universidad Veracruzana, Xalapa, Veracruz, México
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Sánchez-Tafolla L, Padrón JM, Mendoza G, Luna-Rodríguez M, Fernández JJ, Norte M, Trigos Á. Antiproliferative activity of biomass extract from Pseudomonas cedrina. ELECTRON J BIOTECHN 2019. [DOI: 10.1016/j.ejbt.2019.03.010] [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: 11/28/2022] Open
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Rodríguez F, Riobó P, Crespín GD, Daranas AH, de Vera CR, Norte M, Fernández JJ, Fraga S. The toxic benthic dinoflagellate Prorocentrum maculosum Faust is a synonym of Prorocentrum hoffmannianum Faust. Harmful Algae 2018; 78:1-8. [PMID: 30196917 DOI: 10.1016/j.hal.2018.06.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 08/17/2017] [Revised: 06/29/2018] [Accepted: 06/29/2018] [Indexed: 06/08/2023]
Abstract
Three strains of the toxic benthic dinoflagellate Prorocentrum hoffmannianum were isolated in the Canary Islands (north-east Atlantic Ocean, Spain). The identity of the strains was determined by phylogenetic analyses of partial LSU rDNA (D1-D2 regions) but their morphology based on SEM images corresponded to P. maculosum. Their toxin profiles were analyzed by liquid chromatography and high resolution mass spectrometry analysis (LC-HRMS) on cell extracts and culture media. Okadaic acid and three analogs were detected in all strains. Rather, in culture media the detected compounds were variable among strains, two of them being okadaic acid analogs not found on cell extracts. As a result, the taxonomy of the species was revised and P. maculosum is proposed as a junior synonym of P. hoffmannianum whose description is emended.
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Affiliation(s)
- Francisco Rodríguez
- Instituto Español de Oceanografía (IEO), Centro Oceanográfico de Vigo, Subida a Radio Faro 50, 36390 Vigo, Spain.
| | - Pilar Riobó
- Instituto de Investigacións Mariñas (IIM-CSIC), Eduardo Cabello 6, 36208 Vigo, Spain.
| | - Guillermo D Crespín
- Institute for Bio-Organic Chemistry "Antonio González" (IUBO-AG), University of La Laguna, Avda. Astrofísico Francisco Sánchez 2, 38206 La Laguna, Spain.
| | - Antonio H Daranas
- Instituto de Productos Naturales y Agrobiología (IPNA-CSIC), Avda Astrofísico Francisco Sánchez 3, 38206 La Laguna, Spain.
| | - Caterina R de Vera
- Institute for Bio-Organic Chemistry "Antonio González" (IUBO-AG), University of La Laguna, Avda. Astrofísico Francisco Sánchez 2, 38206 La Laguna, Spain.
| | - Manuel Norte
- Institute for Bio-Organic Chemistry "Antonio González" (IUBO-AG), University of La Laguna, Avda. Astrofísico Francisco Sánchez 2, 38206 La Laguna, Spain.
| | - José Javier Fernández
- Institute for Bio-Organic Chemistry "Antonio González" (IUBO-AG), University of La Laguna, Avda. Astrofísico Francisco Sánchez 2, 38206 La Laguna, Spain.
| | - Santiago Fraga
- Instituto Español de Oceanografía (IEO), Centro Oceanográfico de Vigo, Subida a Radio Faro 50, 36390 Vigo, Spain.
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Cen-Pacheco F, Pérez Manríquez C, Luisa Souto M, Norte M, Fernández JJ, Hernández Daranas A. Marine Longilenes, Oxasqualenoids with Ser-Thr Protein Phosphatase 2A Inhibition Activity. Mar Drugs 2018; 16:md16040131. [PMID: 29673138 PMCID: PMC5923418 DOI: 10.3390/md16040131] [Citation(s) in RCA: 5] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 04/11/2018] [Accepted: 04/14/2018] [Indexed: 11/16/2022] Open
Abstract
The red seaweed Laurencia viridis is a rich source of oxygenated secondary metabolites that were derived from squalene. We report here the structures of three novel compounds, (+)-longilene peroxide (1), longilene (2), and (+)-prelongilene (3) that were isolated from this alga, in addition to other substances, 4 and 5, resulting from their acid-mediated degradation. The effect of compounds 1 and 3 against Ser-Thr protein phosphatase type 2A (PP2A) was evaluated, showing that (+)-longilene peroxide (1) inhibited PP2A (IC50 11.3 μM). In order to explain the interaction between PP2A and compounds 1 and 3, molecular docking simulations onto the PP2A enzyme-binding region were used.
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Affiliation(s)
- Francisco Cen-Pacheco
- Instituto Universitario de Bio-Orgánica Antonio González (IUBO AG), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Universidad de La Laguna (ULL), Avenida Astrofísico Francisco Sánchez 2, 38206 Tenerife, Spain.
- Facultad de Bioanálisis, Campus-Veracruz, Universidad Veracruzana, Veracruz 91700, Mexico.
| | - Claudia Pérez Manríquez
- Instituto Universitario de Bio-Orgánica Antonio González (IUBO AG), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Universidad de La Laguna (ULL), Avenida Astrofísico Francisco Sánchez 2, 38206 Tenerife, Spain.
- Departamento de Botánica, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Barrio Universitario, Concepción, Región del Biobío 4030000, Chile.
| | - María Luisa Souto
- Instituto Universitario de Bio-Orgánica Antonio González (IUBO AG), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Universidad de La Laguna (ULL), Avenida Astrofísico Francisco Sánchez 2, 38206 Tenerife, Spain.
- Departamento de Química Orgánica, Universidad de La Laguna (ULL), Avenida Astrofísico Francisco Sánchez 2, 38206 Tenerife, Spain.
| | - Manuel Norte
- Instituto Universitario de Bio-Orgánica Antonio González (IUBO AG), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Universidad de La Laguna (ULL), Avenida Astrofísico Francisco Sánchez 2, 38206 Tenerife, Spain.
- Departamento de Química Orgánica, Universidad de La Laguna (ULL), Avenida Astrofísico Francisco Sánchez 2, 38206 Tenerife, Spain.
| | - José Javier Fernández
- Instituto Universitario de Bio-Orgánica Antonio González (IUBO AG), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Universidad de La Laguna (ULL), Avenida Astrofísico Francisco Sánchez 2, 38206 Tenerife, Spain.
- Departamento de Química Orgánica, Universidad de La Laguna (ULL), Avenida Astrofísico Francisco Sánchez 2, 38206 Tenerife, Spain.
| | - Antonio Hernández Daranas
- Instituto Universitario de Bio-Orgánica Antonio González (IUBO AG), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Universidad de La Laguna (ULL), Avenida Astrofísico Francisco Sánchez 2, 38206 Tenerife, Spain.
- Instituto de Productos Naturales y Agrobiología (IPNA), Consejo Superior de Investigaciones Científicas (CSIC), Avenida Astrofísico Francisco Sánchez 2, 38206 Tenerife, Spain.
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7
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Conde-Rioll M, Gajate C, Fernández JJ, Villa-Pulgarin JA, Napolitano JG, Norte M, Mollinedo F. Antitumor activity of Lepidium latifolium and identification of the epithionitrile 1-cyano-2,3-epithiopropane as its major active component. Mol Carcinog 2017; 57:347-360. [PMID: 29073716 DOI: 10.1002/mc.22759] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 10/13/2017] [Accepted: 10/23/2017] [Indexed: 02/02/2023]
Abstract
Consumption of Brassica (Cruciferae) vegetables is associated with a reduced risk of cancer, but identification of the active components and insights into the underlying molecular events are scarce. Here we found that an extract of Lepidium latifolium, a cruciferous plant native to southern Europe, Mediterranean countries and Asia, showed in vitro cytotoxic activity, inducing caspase-dependent apoptosis, in a variety of human tumor cells, and the plant juice showed in vivo antitumor activity in a HT-29 human colon cancer xenograft mouse model. The epithionitrile 1-cyano-2,3-epithiopropane (CETP) was identified as the major active cancer cell-killing principle of L. latifolium. Synthetic and plant-derived CETP displayed similar proapoptotic activities as assessed by biochemical and morphological analyses. Analysis of the antiproliferative capacity of CETP on a wide number of cancer cell lines from the NCI-60 cell line panel followed by COMPARE analysis, showed an activity profile different from known anticancer agents. Flow cytometry and biochemical analyses revealed that CETP-induced apoptosis involved mitochondria, as assessed by loss of mitochondrial transmembrane potential and generation of reactive oxygen species, while overexpression of Bcl-XL and Bcl-2 prevented CETP-induced apoptosis. Inhibition of reactive oxygen species by glutathione and N-acetyl cysteine reduced the apoptotic response induced by CETP. FADD dominant negative form, blocking Fas/CD95 signaling, and a specific caspase-8 inhibitor also inhibited CETP-induced killing. Taken together, our data suggest that the cancer cell-killing action of CETP, involving both intrinsic and extrinsic apoptotic signaling pathways, underlies the antitumor activity of L. latifolium plant, which could be of potential interest in cancer treatment.
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Affiliation(s)
- María Conde-Rioll
- Institute of Molecular and Cellular Cancer Biology, Cancer Research Center, Spanish National Research Council/Consejo Superior de Investigaciones Científicas (CSIC)-University of Salamanca, Miguel de Unamuno Campus, Salamanca, Spain
| | - Consuelo Gajate
- Institute of Molecular and Cellular Cancer Biology, Cancer Research Center, Spanish National Research Council/Consejo Superior de Investigaciones Científicas (CSIC)-University of Salamanca, Miguel de Unamuno Campus, Salamanca, Spain.,Laboratory of Cell Death and Cancer Therapy, Department of Molecular Biomedicine, Biological Research Center/Centro de Investigaciones Biológicas, CSIC, Madrid, Spain
| | - José J Fernández
- Institute of Bio-Organic Chemistry "Antonio González", Center for Biomedical Research of the Canary Islands (CIBICAN), University of La Laguna, Tenerife, Spain
| | - Janny A Villa-Pulgarin
- Institute of Molecular and Cellular Cancer Biology, Cancer Research Center, Spanish National Research Council/Consejo Superior de Investigaciones Científicas (CSIC)-University of Salamanca, Miguel de Unamuno Campus, Salamanca, Spain
| | - José G Napolitano
- Institute of Bio-Organic Chemistry "Antonio González", Center for Biomedical Research of the Canary Islands (CIBICAN), University of La Laguna, Tenerife, Spain
| | - Manuel Norte
- Institute of Bio-Organic Chemistry "Antonio González", Center for Biomedical Research of the Canary Islands (CIBICAN), University of La Laguna, Tenerife, Spain
| | - Faustino Mollinedo
- Institute of Molecular and Cellular Cancer Biology, Cancer Research Center, Spanish National Research Council/Consejo Superior de Investigaciones Científicas (CSIC)-University of Salamanca, Miguel de Unamuno Campus, Salamanca, Spain.,Laboratory of Cell Death and Cancer Therapy, Department of Molecular Biomedicine, Biological Research Center/Centro de Investigaciones Biológicas, CSIC, Madrid, Spain
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Espinoza C, Couttolenc A, Fernández JJ, Norte M, Plata GB, Padrón JM, Shnyreva A, Trigos Á. Brefeldin-A: an Antiproliferative Metabolite of the Fungus Curvularia trifolii Collected from the Veracruz Coral Reef System, Mexico. J MEX CHEM SOC 2017. [DOI: 10.29356/jmcs.v60i2.77] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In this paper the isolation and structure analysis of three sterols and brefeldin-A from the mycelial extract of the liquid fermentation of fungus <em>Curvularia trifolii</em> isolated from the marine sponge <em>Amphimedon compressa</em> collected from the Coral Reef System of Veracruz is reported. This is the first report on the production of brefeldin-A by the fungus <em>C. trifolii</em>. The results on isolation biological activity support the importance of the conservation of the Mexican ecosystems of coral reefs as a source of microorganisms with a pharmaceutical potential.
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Febles M, Montalvão S, Crespín GD, Norte M, Padrón JM, Tammela P, Fernández JJ, Daranas AH. Synthesis and biological evaluation of crown ether acyl derivatives. Bioorg Med Chem Lett 2016; 26:5591-5593. [PMID: 27765506 DOI: 10.1016/j.bmcl.2016.09.066] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 04/15/2016] [Revised: 09/26/2016] [Accepted: 09/27/2016] [Indexed: 11/29/2022]
Abstract
A set of crown ethyl acyl derivatives based on 18-crown-6 moiety was synthesized and evaluated for biological activity. In vitro antiproliferative profiling demonstrated significant activities against HBL-100, HeLa, SW1573 and WiDr human cell lines. The most active compound exhibited GI50 values in the range of 3.7-5.6μM. Antimicrobial evaluation showed that three polyaromatic compounds were active against Staphylococcus aureus (MIC90 values from 8.3μM to 50μM), whereas a (decyloxy)benzene substitution exhibited moderate activity against Candida albicans (MIC90 values 36μM). According to SAR evaluation, the size of the crown ether and the acyl side chain had a significant effect on the bioactivity. Aromatic moieties close to the acyl group led to improved bioactivity as exemplified by some of the tested compounds. These results provide further evidence on the potential of crown ethyl structure as a scaffold for developing new biological probes and lead candidates for drug development.
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Affiliation(s)
- Martín Febles
- Instituto Universitario de Bio-Organica Antonio Gonzalez (IUBO AG), Universidad de La Laguna, Avenida Francisco Sánchez 2, 38205 La Laguna, Spain
| | - Sofía Montalvão
- Centre for Drug Research, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, PO Box 56, FI-00014 University of Helsinki, Finland
| | - Guillermo Díaz Crespín
- Instituto Universitario de Bio-Organica Antonio Gonzalez (IUBO AG), Universidad de La Laguna, Avenida Francisco Sánchez 2, 38205 La Laguna, Spain
| | - Manuel Norte
- Instituto Universitario de Bio-Organica Antonio Gonzalez (IUBO AG), Universidad de La Laguna, Avenida Francisco Sánchez 2, 38205 La Laguna, Spain
| | - José M Padrón
- Instituto Universitario de Bio-Organica Antonio Gonzalez (IUBO AG), Universidad de La Laguna, Avenida Francisco Sánchez 2, 38205 La Laguna, Spain
| | - Päivi Tammela
- Centre for Drug Research, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, PO Box 56, FI-00014 University of Helsinki, Finland.
| | - José J Fernández
- Instituto Universitario de Bio-Organica Antonio Gonzalez (IUBO AG), Universidad de La Laguna, Avenida Francisco Sánchez 2, 38205 La Laguna, Spain.
| | - Antonio Hernández Daranas
- Instituto Universitario de Bio-Organica Antonio Gonzalez (IUBO AG), Universidad de La Laguna, Avenida Francisco Sánchez 2, 38205 La Laguna, Spain.
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10
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Couttolenc A, Espinoza C, Fernández JJ, Norte M, Plata GB, Padrón JM, Shnyreva A, Trigos Á. Antiproliferative effect of extract from endophytic fungus Curvularia trifolii isolated from the "Veracruz Reef System" in Mexico. Pharm Biol 2016; 54:1392-1397. [PMID: 27102888 DOI: 10.3109/13880209.2015.1081254] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
CONTEXT It is well known that marine fungi are an excellent source of biologically active secondary metabolites, and by 2011, it was reported that over 400 bioactive metabolites were derived from marine fungi. OBJECTIVE This study establishes the basis for future research on antiproliferative compounds of marine endophytes inhabited in the Veracruz Reef System. MATERIALS AND METHODS Isolation of the 34 fungal strains was carried out by microbiological method from samples of sponges, corals, and other biological material from the Veracruz Reef System. The fungal biomass and broth were separated and extracted with a mixture of solvents MeOH:CHCl3. Characterization and molecular identification of the fungal strains were performed through microbiological methods and the analysis of the ITS-rDNA regions. Antiproliferative activity was tested at a dose of 250 μg/mL on human solid tumor cell lines HBL-100, HeLa, SW1573, T-47D, and WiDr by the SRB assay after 48 h-exposure to the fungal extracts. RESULTS The extracts from five isolates showed an antiproliferative effect against one or more of the tested cell lines (percentage growth < 50%). The mycelial extract from the isolate LAEE 03 manifested the highest activity against the five cell lines (% PG of 17 HBL-100, 19 HeLa, 23 SW1573, -6 T-47D, and 10 WiDr) and the strain was identified as Curvularia trifolii (Kauffman) Boedijn (Pleosporaceae). DISCUSSION AND CONCLUSION The results obtained indicate that the extract from a marine derived C. trifolii has the antiproliferative effect, thus suggesting that this organism is a good candidate for further analysis of its metabolites.
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Affiliation(s)
- Alan Couttolenc
- a Doctorado en Ciencias Biomédicas , Universidad Veracruzana , Xalapa-Veracruz , México
| | - Cesar Espinoza
- b Laboratorio de Alta Tecnología de Xalapa , Universidad Veracruzana , Xalapa-Veracruz , México
| | - José J Fernández
- c Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Universidad de La Laguna , La Laguna, Spain
| | - Manuel Norte
- c Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Universidad de La Laguna , La Laguna, Spain
| | - Gabriela B Plata
- c Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Universidad de La Laguna , La Laguna, Spain
| | - José M Padrón
- c Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO-AG), Universidad de La Laguna , La Laguna, Spain
| | - Alla Shnyreva
- d Department of Mycology and Algology, Faculty of Biology , Moscow Lomonosov State University , Moscow , Russia
| | - Ángel Trigos
- b Laboratorio de Alta Tecnología de Xalapa , Universidad Veracruzana , Xalapa-Veracruz , México
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11
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Gutiérrez-Cepeda A, Fernández JJ, Norte M, López-Rodríguez M, Brito I, Muller CD, Souto ML. Additional Insights into the Obtusallene Family: Components of Laurencia marilzae. J Nat Prod 2016; 79:1184-1188. [PMID: 26967625 DOI: 10.1021/acs.jnatprod.5b01080] [Citation(s) in RCA: 8] [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: 06/05/2023]
Abstract
The obtusallenes are a significant subset of C15-halogenated acetogenins that incorporate 12-membered cyclic ethers. We have recently reported the isolation from Laurencia marilzae of 12-epoxyobtusallene IV (1) and its related α,β-unsaturated carboxylate ester (2), both of special biogenetic relevance. Here we describe the final step of our study, the isolation of three new analogues (3-5), among these, the first bromopropargylic derivative (3) of this class of macrocyclic C15-acetogenins. The structures were elucidated by analysis of NMR and X-ray data. 12-Epoxyobtusallene IV (1), its new isomer 4, and known obtusallene IV (6) were evaluated for their apoptosis-inducing activities in a human hepatocarcinoma cell line.
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Affiliation(s)
- Adrián Gutiérrez-Cepeda
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna (ULL) , Avenida Astrofísico Francisco Sánchez, 2, 38206 La Laguna, Tenerife, Spain
- Departamento de Química, Instituto de Química, Facultad de Ciencias, Universidad Autónoma de Santo Domingo , Ciudad Universitaria, 1355 Santo Domingo, Dominican Republic
| | - José J Fernández
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna (ULL) , Avenida Astrofísico Francisco Sánchez, 2, 38206 La Laguna, Tenerife, Spain
| | - Manuel Norte
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna (ULL) , Avenida Astrofísico Francisco Sánchez, 2, 38206 La Laguna, Tenerife, Spain
| | - Matías López-Rodríguez
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna (ULL) , Avenida Astrofísico Francisco Sánchez, 2, 38206 La Laguna, Tenerife, Spain
| | - Iván Brito
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna (ULL) , Avenida Astrofísico Francisco Sánchez, 2, 38206 La Laguna, Tenerife, Spain
- Departamento de Química, Universidad de Antofagasta , Avenida Angamos 601, Antofagasta, Chile
| | - Christian D Muller
- Laboratoire d'Innovation Thérapeutique, UMR 7200 CRNS, Faculté de Pharmacie, Université de Strasbourg , 67401 Illkirch, France
| | - María L Souto
- Instituto Universitario de Bio-Orgánica "Antonio González" (IUBO), Centro de Investigaciones Biomédicas de Canarias (CIBICAN), Departamento de Química Orgánica, Universidad de La Laguna (ULL) , Avenida Astrofísico Francisco Sánchez, 2, 38206 La Laguna, Tenerife, Spain
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12
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Mendoza G, Suárez-Medellín J, Espinoza C, Ramos-Ligonio A, Fernández JJ, Norte M, Trigos Á. Isolation and Characterization of Bioactive Metabolites from Fruiting Bodies and Mycelial Culture of Ganoderma oerstedii (Higher Basidiomycetes) from Mexico. Int J Med Mushrooms 2015; 17:501-9. [PMID: 26349508 DOI: 10.1615/intjmedmushrooms.v17.i6.10] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Various species of the genus Ganoderma have been used for centuries according to oriental tradition as a source of medicines and nutrients. A chemical study of the fruiting bodies and mycelial culture of G. oerstedii was carried out with the idea of isolating and characterizing active natural components present to make use of their potential pharmaceutical application in Mexico. The fruiting bodies and mycelial culture of G. oesrtedii were lyophylized and extracted one after the other with hexane, chloroform, and methanol. Following this process, each substance was extracted separately by using column chromatography. From fruiting bodies eight metabolites, five sterols (ergosta-7,22-dien-3β-ol, ergosterol peroxide, ergosterol, cerevisterol, and ergosta-7,22-dien-3-one) as well as three terpene compounds (ganodermanondiol, ganoderic acid Sz, and ganoderitriol M) were obtained from fruiting bodies. From the mycelial culture three metabolites, two sterols (ergosterol and cerevisterol), and a new terpene compound (ganoderic acetate from the acid) were obtained. These structures were established based on a spectroscopic analysis mainly using nuclear magnetic resonance and a comparison with data already established.
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Affiliation(s)
- Guillermo Mendoza
- Instituto de Biotecnologia y Ecologia Aplicada (INBIOTECA), Av. de las Culturas Veracruzanas No. 101, Col. E. Zapata C.P. 91090, Xalapa, Veracruz, Mexico; Laboratorio de Alta Tecnologia de Xalapa (LATEX), Universidad Veracruzana, Calle Medicos No. 5
| | - Jorge Suárez-Medellín
- Centro de Investigaciones Cerebrales (CICE), Universidad Veracruzana. Av. Dr. Luis Castelazo Ayala s/n, Colonia Industrial Animas, 9119, Xalapa, Veracruz, Mexico
| | - César Espinoza
- Laboratorio de Alta Tecnologia de Xalapa (LATEX), Universidad Veracruzana. Calle Medicos 5, Unidad del Bosque, 91010, Xalapa, Veracruz, Mexico
| | - Angel Ramos-Ligonio
- LADISER Inmunologia y Biologia Molecular, Facultad de Ciencias Quimicas, Universidad Veracruzana, Orizaba, Veracruz, Mexico
| | - José J Fernández
- Instituto Universitario de Bio-Organica "'Antonio Gonzalez"', Universidad de La Laguna, Astrofisico Francisco Sanchez 2, 38206, La Laguna, Tenerife, Spain
| | - Manuel Norte
- Instituto Universitario de Bio-Organica "'Antonio Gonzalez"', Universidad de La Laguna, Astrofisico Francisco Sanchez 2, 38206, La Laguna, Tenerife, Spain
| | - Ángel Trigos
- Laboratorio de Alta Tecnologia de Xalapa (LATEX), Universidad Veracruzana, Calle Medicos No. 5, Col. Unidad del Bosque, 91010, Xalapa, Veracruz, Mexico; Institute de Ciencias Basicas, Universidad Veracruzana, Xalapa, Veracruz, Mexico
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13
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Gutiérrez-Cepeda A, Fernández JJ, Norte M, Montalvão S, Tammela P, Souto ML. Acetate-Derived Metabolites from the Brown Alga Lobophora variegata. J Nat Prod 2015; 78:1716-22. [PMID: 26126835 DOI: 10.1021/acs.jnatprod.5b00415] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Seven new nonadecaketides (1-7), lobophorols A-C, lobophopyranones A and B, and lobophorones A and B, along with the first naturally occurring related metabolites (8-10), were isolated from specimens of Lobophora variegata collected from the Canary Islands. Their structures were determined by extensive spectroscopic methods. In addition, an insight into the biosynthesis of these compounds on the basis of the involvement of type III polyketide synthases is proposed. Lobophorol A (1) showed significant antibacterial activity against Staphylococcus aureus.
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Affiliation(s)
- Adrián Gutiérrez-Cepeda
- †Institute for Bio-Organic Chemistry "Antonio González", Center for Biomedical Research of the Canary Islands (CIBICAN), Department of Organic Chemistry, University of La Laguna, 38206 La Laguna, Tenerife, Spain
| | - José J Fernández
- †Institute for Bio-Organic Chemistry "Antonio González", Center for Biomedical Research of the Canary Islands (CIBICAN), Department of Organic Chemistry, University of La Laguna, 38206 La Laguna, Tenerife, Spain
| | - Manuel Norte
- †Institute for Bio-Organic Chemistry "Antonio González", Center for Biomedical Research of the Canary Islands (CIBICAN), Department of Organic Chemistry, University of La Laguna, 38206 La Laguna, Tenerife, Spain
| | - Sofia Montalvão
- §Centre for Drug Research, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014 Helsinki, Finland
| | - Päivi Tammela
- §Centre for Drug Research, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, P.O. Box 56, FI-00014 Helsinki, Finland
| | - María L Souto
- †Institute for Bio-Organic Chemistry "Antonio González", Center for Biomedical Research of the Canary Islands (CIBICAN), Department of Organic Chemistry, University of La Laguna, 38206 La Laguna, Tenerife, Spain
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14
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Cen-Pacheco F, Santiago-Benítez AJ, García C, Álvarez-Méndez SJ, Martín-Rodríguez AJ, Norte M, Martín VS, Gavín JA, Fernández JJ, Daranas AH. Oxasqualenoids from Laurencia viridis: Combined Spectroscopic-Computational Analysis and Antifouling Potential. J Nat Prod 2015; 78:712-721. [PMID: 25781558 DOI: 10.1021/np5008922] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The chemical study of the red alga Laurencia viridis has led to the isolation of four new polyether triterpenoids: 28-hydroxysaiyacenol B (2), saiyacenol C (3), 15,16-epoxythyrsiferol A (4), and 15,16-epoxythyrsiferol B (5). The structures of 2 and 3 were established mainly by NMR data analysis and comparison with the well-known metabolite dehydrothyrsiferol (1). However, due to the existence of a nonprotonated carbon within the epoxide functionality, stereochemical assignments in 4 and 5 required an in-depth structural study that included NOESY data, J-based configuration analysis, comparison with synthetic models, and DFT calculations. The biological activities of the new metabolites and other related oxasqualenoids were evaluated for the first time against a panel of relevant biofouling marine organisms, and structure-activity conclusions were obtained.
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Affiliation(s)
- Francisco Cen-Pacheco
- ‡Faculty of Bioanalysis, Campus-Veracruz, Universidad Veracruzana, 91700, Veracruz, México
| | | | | | | | - Alberto J Martín-Rodríguez
- ⊥Oceanic Platform of the Canary Islands (PLOCAN), Carretera de Taliarte s/n, 35214, Telde, Gran Canaria, Spain
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15
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Domínguez HJ, Napolitano JG, Fernández-Sánchez MT, Cabrera-García D, Novelli A, Norte M, Fernández JJ, Daranas AH. Belizentrin, a Highly Bioactive Macrocycle from the Dinoflagellate Prorocentrum belizeanum. Org Lett 2014; 16:4546-9. [DOI: 10.1021/ol502102f] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Humberto J. Domínguez
- Institute
for Bio-Organic Chemistry “Antonio González”,
Center for Biomedical Research of the Canary Islands,
and ∥Department of Chemical
Engineering and Pharmaceutical Technology, Faculty of Pharmacy, University of La Laguna, 38206 La Laguna, Tenerife, Spain
- Department
of Biochemistry and Molecular Biology, and §Department of Psychology, Institute
of Biotechnology of Asturias, Campus “El Cristo”, University of Oviedo, Oviedo 33006, Spain
| | - José G. Napolitano
- Institute
for Bio-Organic Chemistry “Antonio González”,
Center for Biomedical Research of the Canary Islands,
and ∥Department of Chemical
Engineering and Pharmaceutical Technology, Faculty of Pharmacy, University of La Laguna, 38206 La Laguna, Tenerife, Spain
- Department
of Biochemistry and Molecular Biology, and §Department of Psychology, Institute
of Biotechnology of Asturias, Campus “El Cristo”, University of Oviedo, Oviedo 33006, Spain
| | - M. Teresa Fernández-Sánchez
- Institute
for Bio-Organic Chemistry “Antonio González”,
Center for Biomedical Research of the Canary Islands,
and ∥Department of Chemical
Engineering and Pharmaceutical Technology, Faculty of Pharmacy, University of La Laguna, 38206 La Laguna, Tenerife, Spain
- Department
of Biochemistry and Molecular Biology, and §Department of Psychology, Institute
of Biotechnology of Asturias, Campus “El Cristo”, University of Oviedo, Oviedo 33006, Spain
| | - David Cabrera-García
- Institute
for Bio-Organic Chemistry “Antonio González”,
Center for Biomedical Research of the Canary Islands,
and ∥Department of Chemical
Engineering and Pharmaceutical Technology, Faculty of Pharmacy, University of La Laguna, 38206 La Laguna, Tenerife, Spain
- Department
of Biochemistry and Molecular Biology, and §Department of Psychology, Institute
of Biotechnology of Asturias, Campus “El Cristo”, University of Oviedo, Oviedo 33006, Spain
| | - Antonello Novelli
- Institute
for Bio-Organic Chemistry “Antonio González”,
Center for Biomedical Research of the Canary Islands,
and ∥Department of Chemical
Engineering and Pharmaceutical Technology, Faculty of Pharmacy, University of La Laguna, 38206 La Laguna, Tenerife, Spain
- Department
of Biochemistry and Molecular Biology, and §Department of Psychology, Institute
of Biotechnology of Asturias, Campus “El Cristo”, University of Oviedo, Oviedo 33006, Spain
| | - Manuel Norte
- Institute
for Bio-Organic Chemistry “Antonio González”,
Center for Biomedical Research of the Canary Islands,
and ∥Department of Chemical
Engineering and Pharmaceutical Technology, Faculty of Pharmacy, University of La Laguna, 38206 La Laguna, Tenerife, Spain
- Department
of Biochemistry and Molecular Biology, and §Department of Psychology, Institute
of Biotechnology of Asturias, Campus “El Cristo”, University of Oviedo, Oviedo 33006, Spain
| | - José J. Fernández
- Institute
for Bio-Organic Chemistry “Antonio González”,
Center for Biomedical Research of the Canary Islands,
and ∥Department of Chemical
Engineering and Pharmaceutical Technology, Faculty of Pharmacy, University of La Laguna, 38206 La Laguna, Tenerife, Spain
- Department
of Biochemistry and Molecular Biology, and §Department of Psychology, Institute
of Biotechnology of Asturias, Campus “El Cristo”, University of Oviedo, Oviedo 33006, Spain
| | - Antonio Hernández Daranas
- Institute
for Bio-Organic Chemistry “Antonio González”,
Center for Biomedical Research of the Canary Islands,
and ∥Department of Chemical
Engineering and Pharmaceutical Technology, Faculty of Pharmacy, University of La Laguna, 38206 La Laguna, Tenerife, Spain
- Department
of Biochemistry and Molecular Biology, and §Department of Psychology, Institute
of Biotechnology of Asturias, Campus “El Cristo”, University of Oviedo, Oviedo 33006, Spain
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16
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Gutiérrez-Cepeda A, Daranas AH, Fernández JJ, Norte M, Souto ML. Stereochemical determination of five-membered cyclic ether acetogenins using a spin-spin coupling constant approach and DFT calculations. Mar Drugs 2014; 12:4031-44. [PMID: 24988069 PMCID: PMC4113813 DOI: 10.3390/md12074031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 03/28/2014] [Accepted: 04/10/2014] [Indexed: 01/31/2023] Open
Abstract
Five-membered rings are of particular interest, due to their presence in some of the most common molecules in chemistry and biology. Despite their apparent simplicity, the structural resolution of these rings is complex, due to their inherent conformational flexibility. Here, we describe an application of a recently reported simple and efficient NMR protocol based on the measurement of spin-spin coupling constants to achieve the challenging relative configurations of five new halogenated C15 tetrahydrofuranyl-acetogenins, marilzafurollenes A–D (1–4) and 12-acetoxy-marilzafurenyne (5), isolated from the red alga, Laurencia marilzae. Although DFT chemical shift calculations were used to connect remote stereocenters, the NMR-based approach seems advantageous over computational techniques in this context, as the presence of halogens may interfere with reliable calculations.
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Affiliation(s)
- Adrián Gutiérrez-Cepeda
- University Institute of Bio-Organic Chemistry "Antonio González", Center for Biomedical Research of the Canary Islands (CIBICAN), University of La Laguna, Astrofísico Francisco Sánchez 2, La Laguna 38206, Tenerife, Spain.
| | - Antonio Hernández Daranas
- University Institute of Bio-Organic Chemistry "Antonio González", Center for Biomedical Research of the Canary Islands (CIBICAN), University of La Laguna, Astrofísico Francisco Sánchez 2, La Laguna 38206, Tenerife, Spain.
| | - José J Fernández
- University Institute of Bio-Organic Chemistry "Antonio González", Center for Biomedical Research of the Canary Islands (CIBICAN), University of La Laguna, Astrofísico Francisco Sánchez 2, La Laguna 38206, Tenerife, Spain.
| | - Manuel Norte
- University Institute of Bio-Organic Chemistry "Antonio González", Center for Biomedical Research of the Canary Islands (CIBICAN), University of La Laguna, Astrofísico Francisco Sánchez 2, La Laguna 38206, Tenerife, Spain.
| | - María L Souto
- University Institute of Bio-Organic Chemistry "Antonio González", Center for Biomedical Research of the Canary Islands (CIBICAN), University of La Laguna, Astrofísico Francisco Sánchez 2, La Laguna 38206, Tenerife, Spain.
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17
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Affiliation(s)
- Francisco Cen-Pacheco
- Faculty
of Bioanalysis Campus-Veracruz, Universidad Veracruzana, 91700 Veracruz, Mexico
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18
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Martín-Rodríguez AJ, González-Orive A, Hernández-Creus A, Morales A, Dorta-Guerra R, Norte M, Martín VS, Fernández JJ. On the influence of the culture conditions in bacterial antifouling bioassays and biofilm properties: Shewanella algae, a case study. BMC Microbiol 2014; 14:102. [PMID: 24755232 PMCID: PMC4021068 DOI: 10.1186/1471-2180-14-102] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2013] [Accepted: 04/11/2014] [Indexed: 12/22/2022] Open
Abstract
Background A variety of conditions (culture media, inocula, incubation temperatures) are employed in antifouling tests with marine bacteria. Shewanella algae was selected as model organism to evaluate the effect of these parameters on: bacterial growth, biofilm formation, the activity of model antifoulants, and the development and nanomechanical properties of the biofilms. The main objectives were: 1) To highlight and quantify the effect of these conditions on relevant parameters for antifouling studies: biofilm morphology, thickness, roughness, surface coverage, elasticity and adhesion forces. 2) To establish and characterise in detail a biofilm model with a relevant marine strain. Results Both the medium and the temperature significantly influenced the total cell densities and biofilm biomasses in 24-hour cultures. Likewise, the IC50 of three antifouling standards (TBTO, tralopyril and zinc pyrithione) was significantly affected by the medium and the initial cell density. Four media (Marine Broth, MB; 2% NaCl Mueller-Hinton Broth, MH2; Luria Marine Broth, LMB; and Supplemented Artificial Seawater, SASW) were selected to explore their effect on the morphological and nanomechanical properties of 24-h biofilms. Two biofilm growth patterns were observed: a clear trend to vertical development, with varying thickness and surface coverage in MB, LMB and SASW, and a horizontal, relatively thin film in MH2. The Atomic Force Microscopy analysis showed the lowest Young modulii for MB (0.16 ± 0.10 MPa), followed by SASW (0.19 ± 0.09 MPa), LMB (0.22 ± 0.13 MPa) and MH2 (0.34 ± 0.16 MPa). Adhesion forces followed an inverted trend, being higher in MB (1.33 ± 0.38 nN) and lower in MH2 (0.73 ± 0.29 nN). Conclusions All the parameters significantly affected the ability of S. algae to grow and form biofilms, as well as the activity of antifouling molecules. A detailed study has been carried out in order to establish a biofilm model for further assays. The morphology and nanomechanics of S. algae biofilms were markedly influenced by the nutritional environments in which they were developed. As strategies for biofilm formation inhibition and biofilm detachment are of particular interest in antifouling research, the present findings also highlight the need for a careful selection of the assay conditions.
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Affiliation(s)
- Alberto J Martín-Rodríguez
- Institute for Bio-Organic Chemistry "Antonio González", Center for Biomedical Research of the Canary Islands (CIBICAN), University of La Laguna, Avenida Astrofísico Francisco Sánchez 2, La Laguna, Tenerife 38206, Spain.
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19
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Cruz PG, Norte M, Hernández Creus A, Fernández JJ, Hernández Daranas A. Self-association of okadaic acid: structural and pharmacological significance. Mar Drugs 2013; 11:1866-77. [PMID: 23760016 PMCID: PMC3721210 DOI: 10.3390/md11061866] [Citation(s) in RCA: 11] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 05/06/2013] [Accepted: 05/07/2013] [Indexed: 02/08/2023] Open
Abstract
Okadaic acid (OA) has been an invaluable pharmacological tool in the study of cellular signaling. The great affinity of this polyether for its targets together with its high specificity to inhibit certain protein phosphatases enables the differential study of these proteins. Crystallographic structures of protein phosphatases in complex with OA show a 1:1 protein to toxin ratio. Nevertheless, it has been found that OA is able to self-associate under certain conditions although very little is known about the importance of this phenomenon. Here we review the available knowledge on the latter topic and we report on the existence of an unusual self-associated tetrameric form. The structure of these oligomers is proposed based on spectroscopic data and molecular modeling calculations.
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Affiliation(s)
- Patricia G. Cruz
- University Institute for Bio-Organic Chemistry “Antonio González” (IUBO), University of La Laguna (ULL), Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain; E-Mails: (P.G.C.); (M.N.)
- Pharma Mar, Avda. de los Reyes, 1 P.I. La Mina-Norte, Colmenar Viejo, Madrid 28770, Spain
| | - Manuel Norte
- University Institute for Bio-Organic Chemistry “Antonio González” (IUBO), University of La Laguna (ULL), Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain; E-Mails: (P.G.C.); (M.N.)
- Department of Organic Chemistry, University of La Laguna (ULL), Astrofísico Francisco Sánchez 1, 38206 La Laguna, Tenerife, Spain
| | - Alberto Hernández Creus
- Department of Physical Chemistry, University Institute of Materials and Nanotechnology, University of La Laguna (ULL), Astrofísico Francisco Sánchez 1, 38206 La Laguna, Tenerife, Spain; E-Mail:
| | - José J. Fernández
- University Institute for Bio-Organic Chemistry “Antonio González” (IUBO), University of La Laguna (ULL), Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain; E-Mails: (P.G.C.); (M.N.)
- Department of Organic Chemistry, University of La Laguna (ULL), Astrofísico Francisco Sánchez 1, 38206 La Laguna, Tenerife, Spain
- Authors to whom correspondence should be addressed; E-Mails: (J.J.F.); (A.H.D.); Tel.: +34-922-318587; Fax: +34-922-318571
| | - Antonio Hernández Daranas
- University Institute for Bio-Organic Chemistry “Antonio González” (IUBO), University of La Laguna (ULL), Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain; E-Mails: (P.G.C.); (M.N.)
- Department of Chemical Engineering and Pharmaceutical Technology, University of La Laguna (ULL), Astrofísico Francisco Sánchez 1, 38206 La Laguna, Tenerife, Spain
- Authors to whom correspondence should be addressed; E-Mails: (J.J.F.); (A.H.D.); Tel.: +34-922-318587; Fax: +34-922-318571
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20
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Cen-Pacheco F, Rodríguez J, Norte M, Fernández JJ, Hernández Daranas A. Connecting Discrete Stereoclusters by Using DFT and NMR Spectroscopy: The Case of Nivariol. Chemistry 2013; 19:8525-32. [DOI: 10.1002/chem.201204272] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 03/22/2013] [Indexed: 11/08/2022]
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21
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Trigos Á, Espinoza C, Martínez M, Márquez O, León LG, Padrón JM, Norte M, Fernández JJ. Antiproliferative Activity of epi-Cercosporin in Human Solid Tumor Cell Lines. Nat Prod Commun 2013. [DOI: 10.1177/1934578x1300800214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
From cultures of Cercospora piaropi, a phytopathogenic fungus isolated from symptomatic leaves of water hyacinth was obtained a red compound, which, according to the spectroscopic data, was epi-cercosporin. It showed in vitro antiproliferative activity against the panel of human solid tumor cells HBL-100, HeLa, SW1573 and WiDr. Cell cycle studies revealed that epi-cercosporin induces accumulation of cells in G2/M phase.
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Affiliation(s)
- Ángel Trigos
- Laboratorio de Alta Tecnología de Xalapa, Universidad Veracruzana. Calle Médicos, 5, Col. Unidad del Bosque. 91010, Xalapa, Veracruz, México
- Instituto de Ciencias Básicas, Universidad Veracruzana. Luis Castelazo Ayala s/n, Col. Industrial Ánimas, 91190, Xalapa, Veracruz, México
| | - César Espinoza
- Laboratorio de Alta Tecnología de Xalapa, Universidad Veracruzana. Calle Médicos, 5, Col. Unidad del Bosque. 91010, Xalapa, Veracruz, México
| | - Maricela Martínez
- Instituto Mexicano de Tecnología del Agua, Paseo Cuauhnáhuac 8532, 62550 Progreso Jiutepec, Morelos, México
| | - Olivia Márquez
- Laboratorio de Alta Tecnología de Xalapa, Universidad Veracruzana. Calle Médicos, 5, Col. Unidad del Bosque. 91010, Xalapa, Veracruz, México
| | - Leticia G. León
- Instituto Universitario de Bio-Orgánica “Antonio González”, Universidad de La Laguna, Astrofísico Francisco Sánchez 2,38206 La Laguna, Tenerife, Spain
| | - José M. Padrón
- Instituto Universitario de Bio-Orgánica “Antonio González”, Universidad de La Laguna, Astrofísico Francisco Sánchez 2,38206 La Laguna, Tenerife, Spain
| | - Manuel Norte
- Instituto Universitario de Bio-Orgánica “Antonio González”, Universidad de La Laguna, Astrofísico Francisco Sánchez 2,38206 La Laguna, Tenerife, Spain
| | - José J. Fernández
- Instituto Universitario de Bio-Orgánica “Antonio González”, Universidad de La Laguna, Astrofísico Francisco Sánchez 2,38206 La Laguna, Tenerife, Spain
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Fernández-Sánchez MT, Cabrera-García D, Ferrero-Gutierrez A, Pérez-Gómez A, Cruz PG, Daranas AH, Fernández JJ, Norte M, Novelli A. Comparative toxicological study of the novel protein phosphatase inhibitor 19-Epi-okadaic acid in primary cultures of rat cerebellar cells. Toxicol Sci 2013; 132:409-18. [PMID: 23335626 DOI: 10.1093/toxsci/kft006] [Citation(s) in RCA: 6] [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: 01/05/2023] Open
Abstract
Okadaic acid (OKA) and analogues are frequent contaminants of coastal waters and seafood. Structure analysis of the isolated OKA analogue 19-epi-OKA showed important conformation differences expected to result in lower protein phosphatase (PP) inhibitory potencies than OKA. However, 19-epi-OKA and OKA inhibitory activities versus PP2A were unexpectedly found to be virtually equipotent. To investigate the toxicological relevance of these findings, we tested the effects of 19-epi-OKA on cultured cerebellar cells and compared them with those of OKA and its isomer dinophysistoxin-2. 19-epi-OKA caused degeneration of neurites and neuronal death with much lower potency than its congeners. The concentration of 19-epi-OKA that reduced after 24h the maximum neuronal survival (EC5024) by 50% was ~300nM compared with ~2nM and ~8nM for OKA and dinophysistoxin-2, respectively. Exposure to 19-epi-OKA resulted also in less toxicity for cultured glial cells (EC5024,19-epi-OKA ~ 600nM; EC5024,OKA ~ 20nM). 19-epi-OKA induced apoptotic condensation and fragmentation of chromatin, activation of caspases, and activation of ERK1/2 MAP kinases, features previously reported for OKA and dinophysistoxin-2. Also, differential sensitivity to 19-epi-OKA was observed between neuronal and glial cells, a specific characteristic shared by OKA and dinophysistoxin-2 but not by other toxins. Our results are consistent with 19-epi-OKA being included among the group of toxins of OKA and derivatives and support the suitability of cellular bioassays for the detection of these compounds.
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Affiliation(s)
- Maria-Teresa Fernández-Sánchez
- Instituto Universitario de Biotecnología de Asturias, Departamento de Bioquímica y Biología Molecular, Universidad de Oviedo, Oviedo, Spain.
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23
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Vilches TS, Norte M, Daranas AH, Fernández JJ. Biosynthetic studies on water-soluble derivative 5c (DTX5c). Mar Drugs 2012; 10:2234-2245. [PMID: 23170080 PMCID: PMC3497019 DOI: 10.3390/md10102234] [Citation(s) in RCA: 6] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Revised: 09/18/2012] [Accepted: 09/20/2012] [Indexed: 11/23/2022] Open
Abstract
The dinoflagellate Prorocentrum belizeanum is responsible for the production of several toxins involved in the red tide phenomenon known as Diarrhetic Shellfish Poisoning (DSP). In this paper we report on the biosynthetic origin of an okadaic acid water-soluble ester derivative, DTX5c, on the basis of the spectroscopical analysis of ¹³C enriched samples obtained by addition of labelled sodium [l-¹³C], [2-¹³C] acetate to artificial cultures of this dinoflagellate.
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Affiliation(s)
- Tamara S. Vilches
- University Institute for Bio-Organic Chemistry “Antonio González”, University of La Laguna, Av. Astrofísico Francisco Sánchez 2, La Laguna 38206, Spain; (T.S.V.); (M.N.)
| | - Manuel Norte
- University Institute for Bio-Organic Chemistry “Antonio González”, University of La Laguna, Av. Astrofísico Francisco Sánchez 2, La Laguna 38206, Spain; (T.S.V.); (M.N.)
- Department of Organic Chemistry, Faculty of Pharmacy, University of La Laguna, Av. Astrofísico Francisco Sánchez s/n, La Laguna 38206, Spain
| | - Antonio Hernández Daranas
- University Institute for Bio-Organic Chemistry “Antonio González”, University of La Laguna, Av. Astrofísico Francisco Sánchez 2, La Laguna 38206, Spain; (T.S.V.); (M.N.)
- Department of Chemical Engineering and Pharmaceutical Technology, Faculty of Pharmacy, University of La Laguna, Av. Astrofísico Francisco Sánchez s/n, La Laguna 38206, Spain
| | - José J. Fernández
- University Institute for Bio-Organic Chemistry “Antonio González”, University of La Laguna, Av. Astrofísico Francisco Sánchez 2, La Laguna 38206, Spain; (T.S.V.); (M.N.)
- Department of Organic Chemistry, Faculty of Pharmacy, University of La Laguna, Av. Astrofísico Francisco Sánchez s/n, La Laguna 38206, Spain
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24
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Cen-Pacheco F, Mollinedo F, Villa-Pulgarín JA, Norte M, Fernández JJ, Hernández Daranas A. Saiyacenols A and B: the key to solve the controversy about the configuration of aplysiols. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.07.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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25
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Napolitano JG, Gavín JA, García C, Norte M, Fernández JJ, Daranas AH. On the configuration of five-membered rings: a spin-spin coupling constant approach. Chemistry 2011; 17:6338-47. [PMID: 21547972 DOI: 10.1002/chem.201100412] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Indexed: 11/06/2022]
Abstract
Five-membered rings are clearly among the most common structural motifs found in chemistry and biology. Nevertheless, the configuration of conformationally mobile five-membered rings is often difficult to assign from nuclear magnetic resonance (NMR) data. A simple, reliable, and efficient approach for the stereochemical analysis of five-membered rings based on the measurement of NMR coupling constants is presented. Density functional theory calculations using representative conformations of the full conformational space available to rings with different substitution patterns were used to identify differences between the accessible coupling constant values for cis and trans relative orientations of the substituents. The calculations were assessed experimentally using NMR data obtained from a number of models. This approach can be easily used to analyze different five-membered rings, such as oxolanes, cyclopentanes, furanosides and pyrrolidines, and their relative configuration can be determined without the need for making further conformational considerations.
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Affiliation(s)
- José G Napolitano
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain
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26
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Abstract
Nonterpenoid bromoallenes possessing a novel skeleton that incorporates an unprecedented [5.5.1]bicyclotridecane ring system, marilzabicycloallenes A-D (1-4), were isolated from specimens of Laurencia marilzae collected on the Canary Islands. The framework of these metabolites strongly reinforces Braddock's hypothesis concerning the biosynthesis via electrophilic bromination of the obtusallene family.
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Affiliation(s)
- Adrián Gutiérrez-Cepeda
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, La Laguna, Spain
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27
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Gutiérrez-Cepeda A, Fernández JJ, Gil LV, López-Rodríguez M, Norte M, Souto ML. Nonterpenoid C15 acetogenins from Laurencia marilzae. J Nat Prod 2011; 74:441-448. [PMID: 21338119 DOI: 10.1021/np100866g] [Citation(s) in RCA: 24] [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] [Indexed: 05/30/2023]
Abstract
Eight new halogenated C(15) acetogenins, 1-8, were isolated from the organic extract of the red alga Laurencia marilzae. The structure elucidation and the assignments of the relative configurations were established by extensive use of spectroscopic studies, particularly 1D and 2D NMR data, while the absolute configurations of compounds 1 and 5 were determined by single-crystal X-ray diffraction analysis. Compounds 1, 2, 4, 5, and 7, along with the previously reported related cyclic ether obtusallene IV (9), were evaluated against six human solid tumor cell lines. All compounds were found to be essentially inactive (GI(50) > 10 μg/mL).
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Affiliation(s)
- Adrián Gutiérrez-Cepeda
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Astrofísico Francisco Sánchez 2, 38206 La Laguna, Spain
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28
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Napolitano JG, Norte M, Fernández JJ, Hernández Daranas A. Corozalic Acid: A Key Okadaic Acid Biosynthetic Precursor with Phosphatase Inhibition Activity. Chemistry 2010; 16:11576-9. [DOI: 10.1002/chem.201001327] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2010] [Indexed: 11/09/2022]
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29
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Dominguez HJ, Paz B, Daranas AH, Norte M, Franco JM, Fernández JJ. Dinoflagellate polyether within the yessotoxin, pectenotoxin and okadaic acid toxin groups: Characterization, analysis and human health implications. Toxicon 2010; 56:191-217. [DOI: 10.1016/j.toxicon.2009.11.005] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2008] [Revised: 10/11/2009] [Accepted: 11/09/2009] [Indexed: 11/26/2022]
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30
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Domínguez HJ, Souto ML, Norte M, Daranas AH, Fernández JJ. Adriatoxin-B, the first C13 terminal truncated YTX analogue obtained from dinoflagellates. Toxicon 2010; 55:1484-90. [DOI: 10.1016/j.toxicon.2010.02.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2009] [Accepted: 02/27/2010] [Indexed: 11/24/2022]
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31
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Abstract
Marine organisms have attracted scientific community as a rich source of natural products with unusual structural features and remarkable biological activities. Marine macrolides are a prominent class of natural products characterized by a highly oxygenated polyene backbone containing a macrocyclic lactone as a conformational constraint. Many marine macrolides possess outstanding cell growth antiproliferative properties, making them valuable molecular probes for the investigation of biochemical pathways and promising lead compounds for the development of new antitumor chemotherapeutic agents. In the present review we intend to focus on marine macrolides with potent cytotoxic activity that could be exploited in cancer research and therapy, along with those macrolides currently in clinical trials and/or preclinical development.
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Affiliation(s)
- José G Napolitano
- Instituto Universitario de Bioorgánica Antonio González, Universidad de La Laguna, Canary Islands, Spain
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32
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Napolitano J, Norte M, Padrón J, Fernández J, Hernández Daranas A. Belizeanolide, a Cytotoxic Macrolide from the DinoflagellateProrocentrum belizeanum. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200804023] [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: 11/07/2022]
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33
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Napolitano J, Norte M, Padrón J, Fernández J, Hernández Daranas A. Belizeanolide, a Cytotoxic Macrolide from the DinoflagellateProrocentrum belizeanum. Angew Chem Int Ed Engl 2009; 48:796-9. [DOI: 10.1002/anie.200804023] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [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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34
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Brito I, Fernandez J, Daranas A, Norte M, Lopez-Rodriguez M, Cardenas M. Okadaic acid, a conformational study in the solid state. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308088612] [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: 11/10/2022] Open
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35
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Cruz P, Fernández J, Norte M, Daranas A. Belizeanic Acid: A Potent Protein Phosphatase 1 Inhibitor Belonging to the Okadaic Acid Class, with an Unusual Skeleton. Chemistry 2008; 14:6948-56. [DOI: 10.1002/chem.200800593] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [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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36
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Abstract
In this paper we report on the isolation and structural elucidation of two new noncontiguous polypropionates, micromelones A ( 10) and B ( 11), that have been isolated from the marine gastropod Micromelo undata. Their structures were determined through the interpretation of their spectroscopic data, and a biosynthetic pathway from a common linear precursor with other polypropionate groups has been proposed.
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Affiliation(s)
- José G Napolitano
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Astrofísico Francisco Sánchez 2, 38206 La Laguna, Spain
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37
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Abstract
The polyether toxin okadaic acid (OA) inhibits several protein serine/threonine phosphatases that play central roles in the regulation of many essential cellular processes. The use of scanning tunneling microscopy (STM) shows that dimerization of such toxins is crucial to understand the mechanism of toxin transport across model membranes.
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Affiliation(s)
- Antonio Hernández Daranas
- Instituto Universitario de Bio-OrgAnica Antonio GonzAlez, Astrofísico Francisco SAnchez 2, Universidad de La Laguna, 38206 La Laguna, Tenerife, Spain
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38
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Paz B, Daranas AH, Cruz PG, Franco JM, Napolitano JG, Norte M, Fernández JJ. Identification and characterization of DTX-5c and 7-hydroxymethyl-2-methylene-octa-4,7-dienyl okadaate from Prorocentrum belizeanum cultures by LC–MS. Toxicon 2007; 50:470-8. [PMID: 17540428 DOI: 10.1016/j.toxicon.2007.04.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2007] [Revised: 04/11/2007] [Accepted: 04/12/2007] [Indexed: 11/28/2022]
Abstract
The main toxins produced by the dinoflagellate Prorocentrum belizeanum, DTX5c and 7-hydroxymethyl-2methylene-octa-4,7 dienyl okadaate, were studied by liquid chromatography-coupled with ion trap mass spectrometry (LC-MS/MS). Their retention times (RTs) and fragmentation patterns were established, in particular those of DTX5c, as there is a lack of data about these water soluble OA sulphated derivatives. As an application of the LC-MS methodology, a sample of the toxic P. belizeanum culture was analysed for these metabolites. Both metabolites were detected in cells as majority compounds, whereas levels of these compounds in the culture media were undetectable.
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Affiliation(s)
- Beatriz Paz
- Instituto de Investigaciones Marinas (CSIC), Eduardo Cabello 6, 36080 Vigo, Spain
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39
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Paz B, Daranas AH, Cruz PG, Franco JM, Pizarro G, Souto ML, Norte M, Fernández JJ. Characterisation of okadaic acid related toxins by liquid chromatography coupled with mass spectrometry. Toxicon 2007; 50:225-35. [PMID: 17482230 DOI: 10.1016/j.toxicon.2007.03.015] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2006] [Revised: 03/23/2007] [Accepted: 03/23/2007] [Indexed: 11/24/2022]
Abstract
In the Diarrhetic Shellfish Poisoning (DSP) phenomena, the parent toxins, namely okadaic acid (OA) and/or dinophysistoxin-2 (DTX2), are predominantly found esterified. Therefore, a toxicity assessment of a sample can only be performed after an alkaline hydrolysis step in order to recover the parent molecules in their free form. The presence of several OA diol esters has already been confirmed in Prorocentrum lima and Prorocentrum belizeanum cultures. This paper reports on the analysis of OA diol esters using liquid chromatography coupled with mass spectrometry (LC-MS/MS), and establishes a method for their detection and identification based upon their retention times (RT) and the fragmentation patterns of their mass spectra.
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Affiliation(s)
- Beatriz Paz
- Instituto de Investigaciones Marinas (CSIC), Eduardo Cabello 6, 36080 Vigo, Spain
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40
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Abstract
A new protein phosphatase inhibitor, 19-epi-okadaic acid, was isolated from the marine dinoflagellate Prorocentrum belizeanum. Its structure and conformation in solution has been determined, and important differences were found when compared with the lead compound okadaic acid. The new metabolite showed nanomolar activities, and its selectivity for PP2A versus PP1 surpasses that shown by okadaic acid 10-fold, making it one of the most selective inhibitors of this class.
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Affiliation(s)
- Patricia G Cruz
- Instituto Universitario de Bio-OrgAnica Antonio GonzAlez, Universidad de La Laguna, Astrofísico Francisco SAnchez 2, 38206 La Laguna, Tenerife, Spain
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41
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Paz B, Riobó P, Souto ML, Gil LV, Norte M, Fernández JJ, Franco JM. Detection and identification of glycoyessotoxin A in a culture of the dinoflagellate Protoceratium reticulatum. Toxicon 2006; 48:611-9. [PMID: 16920172 DOI: 10.1016/j.toxicon.2006.07.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2006] [Accepted: 07/10/2006] [Indexed: 11/20/2022]
Abstract
The toxin composition of a culture of the dinoflagellate Protoceratium reticulatum was investigated using LC-FLD, after derivatization with DMEQ-TAD (4-(2-(6,7-dimethoxy-4-methyl-3-oxo-3,4-dihydroquinoxalimylethyl)-1,2,4-triazoline-3,5-dione)). Besides yessotoxin (YTX), the new YTX analogue, glycoyessotoxin A (G-YTXA) was detected in culture medium as well as in cells. The conditions for extraction were optimized and the production profile established. Retention time of the resulting fluorescent G-YTXA adduct was identified by comparison of the appropriate standard. Additionally, both G-YTXA and the DMEQ-TAD-G-YTXA adduct were confirmed by LC-MS showing ion peaks at m/z 1273 [M-2Na+H](-) and m/z 1618 [M-2Na+H](-), respectively. The LC-MS(n) displayed a fragmentation pattern similar to that of the YTX series.
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Affiliation(s)
- Beatriz Paz
- Unidad Asociada (CSIC-IEO) Fitoplancton Tóxico Instituto Español de Oceanografía, Centro Oceanográfico de Vigo (IEO), Apdo. 1552, 36200 Vigo, Spain
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42
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Affiliation(s)
- Antonio H. Daranas
- a Instituto Universitario de Bio-Orgánica, Universidad de La Laguna , Carretera de La Esperanza 2, 38206 La Laguna, Tenerife , Spain
| | - José J. Fernández
- a Instituto Universitario de Bio-Orgánica, Universidad de La Laguna , Carretera de La Esperanza 2, 38206 La Laguna, Tenerife , Spain
| | - Manuel Norte
- a Instituto Universitario de Bio-Orgánica, Universidad de La Laguna , Carretera de La Esperanza 2, 38206 La Laguna, Tenerife , Spain
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43
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Cruz PG, Daranas AH, Fernández JJ, Souto ML, Norte M. DTX5c, a new OA sulphate ester derivative from cultures of Prorocentrum belizeanum. Toxicon 2006; 47:920-4. [PMID: 16716373 DOI: 10.1016/j.toxicon.2006.03.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2005] [Accepted: 03/10/2006] [Indexed: 11/19/2022]
Abstract
Prorocentrum belizeanum is a dinoflagellate known for its okadaic acid (OA) and dinophysitoxins (DTXs) production, both OA and DTX are polyether toxins of the Diarrhetic Shellfish Poisoning (DSP) group. We have recently published the isolation of a new diol-ester of okadaic acid from cultures of P. belizeanum. On this occasion we present a new sulphated water-soluble derivative, DTX-5c, isolated from this microalga, whose structure was established on the basis of its spectroscopical data.
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Affiliation(s)
- Patricia G Cruz
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain
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44
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Abstract
The toxic profile of dinoflagellates varies even among identical species, raising an interesting question about the mechanism of toxin regulation and production. In consequence, it also poses a considerable problem in their control methods. In this paper, we report on the isolation and structural elucidation of several new ester derivatives of okadaic acid (OA) from artificial cultures of the genus Prorocentrum. These new compounds enlarge the range of target molecules that must be considered in the monitoring programs.
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Affiliation(s)
- Blanca Suárez-Gómez
- Instituto Universitario de Bio-Orgánica "Antonio González", Universidad de La Laguna, Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain
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45
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Souto ML, Fernández JJ, Franco JM, Paz B, Gil LV, Norte M. Glycoyessotoxin a, a new yessotoxin derivative from cultures of Protoceratium reticulatum. J Nat Prod 2005; 68:420-422. [PMID: 15787449 DOI: 10.1021/np040164j] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The dinoflagellate Protoceratium reticulatum produces toxins of the yessotoxin group currently included in the diarrhetic shellfish poisoning class. In this paper we report on the isolation and structural elucidation of a 32-arabinoside of yessotoxin, G-YTXA (2), obtained from laboratory cultures of P. reticulatum (strain GG1AM) that possesses a pentose unit, beta-arabinofuranose, as a side chain.
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Affiliation(s)
- María L Souto
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Astrofísico Francisco Sanchez 2, 38206 La Laguna, Spain
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46
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Abstract
Marine toxins have drawn wide interest because their economical impact and disastrous effect upon the shellfish industry and public health in many parts of the world. One of the most interesting group of substances of marine toxins, from structural and pharmacological points of view are polyether compounds, which generally present a great diversity in size and potent biological activities. The subject of this work was about to biosynthesis of okadaic acid skeleton as leader as DSP toxins. Its biosynthesis attracts considerable attention since the carbon skeleton has been shown to be synthesised via an unusual route. In this paper we report on stable isotope incorporation experiments on DSP toxin in artificial cultures of dinoflagellate. The comparison of the degrees of incorporation in these samples measured by different methods led to contradictory results. This implies that further experimental data is needed in order to propose a logical biogenetic scheme.
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Affiliation(s)
- Antonio H Daranas
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain
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47
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Abstract
Five new meroditerpenes have been isolated from a brown alga of the genus Cystoseira collected around the Canary Islands. One, cystoseirone diacetate (3), possesses a new rearranged structure with an unusual ether linkage in the diterpene side chain. Its biogenetic origin was explained as derived from the oxidation of amentol chromane diacetate (2) and subsequent cyclization. Structures were determined through the interpretation of the spectral data and by means of chemical transformations. The relative stereochemistry was proposed on the basis of ROESY correlations.
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Affiliation(s)
- Guillermo Navarro
- Instituto Universitario de Bio-Orgánica "Antonio González", Universidad de La Laguna, Astrofísico Francisco Sánchez 2, 38206 La Lguna, Tenerife, Spain
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48
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Abstract
Okadaic acid (OA) is a toxin responsible for diarrhetic shellfish poisoning and is an extremely useful tool for studying processes that are regulated by phosphorylation, although the exact mechanism of action is still undetermined. We report on a study that proved the existence of OA in an unusual dimeric form when complexed with potassium ion. The proposed structure of this dimer is based on spectroscopic and conformational studies.
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Affiliation(s)
- Antonio H Daranas
- Instituto Universitario de Bio-Organica Antonio Gonzalez, Universidad de La Laguna, Astrofisico Francisco Sanchez 2, 38206 La Laguna, Tenerife, Spain
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Fernández JJ, Suárez-Gómez B, Souto ML, Norte M. Identification of new okadaic acid derivatives from laboratory cultures of Prorocentrum lima. J Nat Prod 2003; 66:1294-1296. [PMID: 14510622 DOI: 10.1021/np030110u] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The dinoflagellate Prorocentrum lima produces toxins involved in the red tide phenomenon known as diarrhetic shellfish poisoning (DSP). This paper reports the isolation and spectroscopic structural elucidation of new compounds related to DSP toxins, isolated from a laboratory culture of strain PLV2. Their structures were established from their spectroscopic data.
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Affiliation(s)
- José J Fernández
- Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna, Astrofísico Francisco Sánchez 2, 38206 La Laguna, Tenerife, Spain
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Abstract
This paper reports testing 15 polyether triterpenes with a squalene carbon skeleton for inhibitory effects on type 2A protein phosphatase. Two compounds, 16-hydroxydehydrothyrsiferol 10 and thyrsenol B 14, exhibited significant inhibitory action at a concentration of 10 microM. Comparison with thyrsiferyl-23-acetate 1 showed that a similar spatial disposition for the hydroxy group around C-15 or C-16 was the structural feature shared by these metabolites.
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Affiliation(s)
- María L Souto
- Instituto Universitario de Bio-Orgánica, Universidad de La Laguna, Astrofísico Francisco Sánchez 2, 38206 La Laguna, Spain
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