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Rocha EAA, Silva LF, Fernandes MES, Macedo AF, Soares CS, Pereira RC, Fernandes FL. First of report of occurrence and damage of Synoeca cyanea (Hymenoptera: Vespidae) on Mangifera indica L. in Brazil. BRAZ J BIOL 2023; 83:e275126. [PMID: 37851775 DOI: 10.1590/1519-6984.275126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Accepted: 08/22/2023] [Indexed: 10/20/2023] Open
Affiliation(s)
- E A A Rocha
- Universidade Federal de Viçosa - UFV, Instituto de Ciências Agrárias, Rio Paranaíba, Rio Paranaíba, MG, Brasil
| | - L F Silva
- Universidade Federal de Viçosa - UFV, Instituto de Ciências Agrárias, Rio Paranaíba, Rio Paranaíba, MG, Brasil
| | - M E S Fernandes
- Universidade Federal de Viçosa - UFV, Instituto de Ciências Agrárias, Rio Paranaíba, Rio Paranaíba, MG, Brasil
| | - A F Macedo
- Universidade Federal de Viçosa - UFV, Instituto de Ciências Agrárias, Rio Paranaíba, Rio Paranaíba, MG, Brasil
| | - C S Soares
- Universidade Federal de Viçosa - UFV, Instituto de Ciências Agrárias, Rio Paranaíba, Rio Paranaíba, MG, Brasil
| | - R C Pereira
- Universidade Federal de Viçosa - UFV, Instituto de Ciências Agrárias, Rio Paranaíba, Rio Paranaíba, MG, Brasil
| | - F L Fernandes
- Universidade Federal de Viçosa - UFV, Instituto de Ciências Agrárias, Rio Paranaíba, Rio Paranaíba, MG, Brasil
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Pereira RC, Paradas WC, de Carvalho RT, de Lima Moreira D, Kelecom A, Passos RMF, Atella GC, Salgado LT. Chemical Defense against Herbivory in the Brown Marine Macroalga Padina gymnospora Could Be Attributed to a New Hydrocarbon Compound. Plants (Basel) 2023; 12:1073. [PMID: 36903932 PMCID: PMC10005330 DOI: 10.3390/plants12051073] [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] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 02/21/2023] [Accepted: 02/22/2023] [Indexed: 06/18/2023]
Abstract
Brown marine macroalga Padina gymnospora (Phaeophyceae, Ochrophyta) produces both secondary metabolites (phlorotannins) and precipitate calcium carbonate (CaCO3-aragonite) on its surface as potential defensive strategies against herbivory. Here, we have evaluated the effect of natural concentrations of organic extracts (dichloromethane-DI; ethyl acetate-EA and methanol-ME, and three isolated fractions) and mineralized tissues of P. gymnospora as chemical and physical resistance, respectively, against the sea urchin Lytechinus variegatus through experimental laboratory feeding bioassays. Fatty acids (FA), glycolipids (GLY), phlorotannins (PH) and hydrocarbons (HC) were also characterized and/or quantified in extracts and fractions from P. gymnospora using nuclear magnetic resonance (NMR) and gas chromatography (GC) coupled to mass spectrometry (CG/MS) or GC coupled to flame ionization detector (FID) and chemical analysis. Our results showed that chemicals from the EA extract of P. gymnospora were significantly important in reducing consumption by L. variegatus, but the CaCO3 did not act as a physical protection against consumption by this sea urchin. An enriched fraction containing 76% of the new hydrocarbon 5Z,8Z,11Z,14Z-heneicosatetraene exhibited a significant defensive property, while other chemicals found in minor amounts, such as GLY, PH, saturated and monounsaturated FAs and CaCO3 did not interfere with the susceptibility of P. gymnospora to L. variegatus consumption. We suggest that the unsaturation of the 5Z,8Z,11Z,14Z-heneicosatetraene from P. gymnospora is probably an important structural characteristic responsible for the defensive property verified against the sea urchin.
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Affiliation(s)
- Renato Crespo Pereira
- Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal Fluminense, Niterói 24220-900, Brazil
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro 22460-030, Brazil
| | - Wladimir Costa Paradas
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro 22460-030, Brazil
| | | | | | - Alphonse Kelecom
- Departamento de Biologia Geral, Instituto de Biologia, Universidade Federal Fluminense, Niterói 24220-900, Brazil
| | | | - Georgia Correa Atella
- Instituto de Bioquímica Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-901, Brazil
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Ribeiro FDV, Pessarodona A, Tucket C, Mulders Y, Pereira RC, Wernberg T. Shield wall: Kelps are the last stand against corals in tropicalised reefs. Funct Ecol 2022. [DOI: 10.1111/1365-2435.14141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Felipe de Vargas Ribeiro
- Programa de Pós‐Graduação em Dinâmica dos Oceanos e da Terra, Universidade Federal Fluminense Rio de Janeiro Brazil
- Departamento de Biologia Marinha Instituto de Biologia, Universidade Federal Fluminense Rio de Janeiro Brazil
- UWA Oceans Institute & School of Biological Sciences, University of Western Australia, Crawley Western Australia Australia
| | - Albert Pessarodona
- UWA Oceans Institute & School of Biological Sciences, University of Western Australia, Crawley Western Australia Australia
| | - Chenae Tucket
- UWA Oceans Institute & School of Biological Sciences, University of Western Australia, Crawley Western Australia Australia
| | - Yannick Mulders
- UWA Oceans Institute & School of Biological Sciences, University of Western Australia, Crawley Western Australia Australia
| | - Renato Crespo Pereira
- Programa de Pós‐Graduação em Dinâmica dos Oceanos e da Terra, Universidade Federal Fluminense Rio de Janeiro Brazil
- Departamento de Biologia Marinha Instituto de Biologia, Universidade Federal Fluminense Rio de Janeiro Brazil
- Instituto de Pesquisas Jardim Botânico Rio de Janeiro Brazil
| | - Thomas Wernberg
- UWA Oceans Institute & School of Biological Sciences, University of Western Australia, Crawley Western Australia Australia
- Department of Science and Environment (DSE) Roskilde University Roskilde Denmark
- Institute of Marine Research, Floedevigen Research Station Norway
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de Carvalho RT, Rocha GM, Karez CS, da Gama Bahia R, Pereira RC, Bastos AC, Salgado LT. Global assessment of coralline algae mineralogy points to high vulnerability of Southwestern Atlantic reefs and rhodolith beds to ocean acidification. Sci Rep 2022; 12:9589. [PMID: 35688967 PMCID: PMC9187768 DOI: 10.1038/s41598-022-13731-y] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 05/12/2022] [Indexed: 11/09/2022] Open
Abstract
Coralline algae constitute one of the main groups of highly vulnerable calcified benthic organisms to ocean acidification. Although damaging effects of seawater acidification on the coralline algae skeleton have been widely demonstrated, the susceptibility to dissolution varies according to the Mg2+ in the calcite lattice. Even though the Southwest Atlantic Ocean exhibits the world's largest rhodolith beds, which occupies 20,902 km2, there is no information regarding the coralline algae species mineralogy in this area. Here, we provide mineralogical data of twenty-four coralline algae species, examine the similarity in taxonomic groups, spatial occurrence and the vulnerability of these algae to seawater acidification. Mineralogy revealed that coralline algae skeletons were mainly composed of high-Mg calcite (> 70%) with minor presence of aragonite (< 30%) and dolomite (< 3%). There were no similarities between the skeletal mineralogy of taxonomic groups and sampling regions. Remarkably, the mean Mg-substitution of encrusting coralline algae from the Brazilian Shelf was 46.3% higher than global average. Because of the higher mean Mg-substitution in calcite compared with worldwide coralline algae, these algae from Southwest Atlantic Ocean would be highly susceptible to dissolution caused by the expected near-future ocean acidification and will compromise CaCO3 net production across the Brazilian Shelf.
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Affiliation(s)
- Rodrigo Tomazetto de Carvalho
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão, 915, Jardim Botânico, Rio de Janeiro, RJ, CEP 22460-030, Brazil
| | - Gustavo Miranda Rocha
- Instituto de Biofísica Carlos Chagas Filho, CCS-Centro de Ciências da Saúde, Cidade Universitária, Rio de Janeiro, RJ, 21941-902, Brazil
| | - Claudia Santiago Karez
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão, 915, Jardim Botânico, Rio de Janeiro, RJ, CEP 22460-030, Brazil
| | - Ricardo da Gama Bahia
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão, 915, Jardim Botânico, Rio de Janeiro, RJ, CEP 22460-030, Brazil
| | - Renato Crespo Pereira
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão, 915, Jardim Botânico, Rio de Janeiro, RJ, CEP 22460-030, Brazil
| | - Alex Cardoso Bastos
- Departamento de Ecologia e Recursos Naturais, Centro de Ciências Humanas e Naturais, Universidade Federal do Espírito Santo, Av. Fernando Ferrari, 514 Goiabeiras, Vitória, ES, CEP 29055-460, Brazil
| | - Leonardo Tavares Salgado
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão, 915, Jardim Botânico, Rio de Janeiro, RJ, CEP 22460-030, Brazil.
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Pereira RC, Nocchi N, Konno TUP, Soares AR. Diverse traits of aquatic plants cannot individually explain their consumption by the generalist gastropod Biomphalairia glabrata. PeerJ 2021; 9:e12031. [PMID: 34616600 PMCID: PMC8459730 DOI: 10.7717/peerj.12031] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 07/30/2021] [Indexed: 11/25/2022] Open
Abstract
Several experimental studies on aquatic plants have reported the prevalence of chemical defense mechanism against herbivory, as opposed to structural, life-forms or other traits. Here, our laboratory feeding experiments and integrative analysis explored the relationship among palatability (fresh or reconstituted plants used as artificial diet) and various chemical/nutritional traits (i.e., contents of dry mass, ash, nitrogen, protein, and phenols) of diverse aquatic plants and their susceptibility to consumption by the generalist gastropod Biomphalaria glabrata. Biomphalaria glabrata consumed all of the assayed aquatic plants in a hierarchical yet generalized way, with the consumption of fresh plants, their reconstituted forms and defensive properties of lipophilic extracts not being significantly correlated with plant physical or chemical traits to determine the feeding preference of the gastropod. Our results do not reveal a prevalence for a specific plant attribute contributing to herbivory. Instead, they indicate that the susceptibility of aquatic plants to generalist consumers is probably related to a combination of their chemical and physical properties, resulting in moderate grazing rates by generalist consumers.
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Affiliation(s)
- Renato Crespo Pereira
- Universidade Federal Fluminense, Departamento de Biologia Marinha, Rio de Janeiro, Brazil.,Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Nathália Nocchi
- Instituto Universitario de Bio-Orgánica Antonio González, Departamento de Química Orgánica, Universidad de La Laguna (ULL), La Laguna, Tenerife, Spain.,Grupo de Produtos Naturais de Organismos Aquáticos, Instituto de Biodiversidade e Sustentabilidade (NUPEM), Universidade Federal do Rio de Janeiro, Macaé, Rio de Janeiro, Brazil
| | - Tatiana U P Konno
- Instituto de Biodiversidade e Sustentabilidade (NUPEM)/Grupo de Produtos Naturais de Organismos Aquáticos, Universidade Federal do Rio de Janeiro (UFRJ), Macaé, Rio de Janeiro, Brazil
| | - Angelica R Soares
- Grupo de Produtos Naturais de Organismos Aquáticos, Instituto de Biodiversidade e Sustentabilidade (NUPEM), Universidade Federal do Rio de Janeiro, Macaé, Rio de Janeiro, Brazil.,Instituto de Biodiversidade e Sustentabilidade (NUPEM)/Grupo de Produtos Naturais de Organismos Aquáticos, Universidade Federal do Rio de Janeiro (UFRJ), Macaé, Rio de Janeiro, Brazil
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Ferrari J, Goncalves P, Campbell AH, Sudatti DB, Wood GV, Thomas T, Pereira RC, Steinberg PD, Marzinelli EM. Molecular analysis of a fungal disease in the habitat-forming brown macroalga Phyllospora comosa (Fucales) along a latitudinal gradient. J Phycol 2021; 57:1504-1516. [PMID: 33942303 DOI: 10.1111/jpy.13180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 04/09/2021] [Indexed: 06/12/2023]
Abstract
Infectious diseases affecting habitat-forming species can have significant impacts on population dynamics and alter the structure and functioning of marine ecosystems. Recently, a fungal infection was described as the causative agent of necrotic lesions on the stipe of the forest-forming macroalga Phyllospora comosa, a disease named "stipe rot" (SR). Here, we developed a quantitative PCR (qPCR) method for rapid detection and quantification of this pathogen, which was applied to evaluate the level of SR infection in eight P. comosa populations spanning the entire latitudinal distribution of this species along southeastern Australia. We also investigated the relationship between the abundance and prevalence of Stipe Rot Fungus (SRF) and potential host chemical defenses as well as its relationship with morphological and ecophysiological traits of P. comosa. qPCR estimates of SRF abundance reflected the levels of infection estimated by visual assessment, with higher numbers of SRF copies being observed in individuals showing high or intermediate levels of visual symptoms of SR. Concordance of conventional PCR and visual assessments was 92 and 94%, respectively, compared to qPCR detection. SRF prevalence was positively related to fucoxanthin content and herbivory, but not significant related to other traits measured (phlorotannin content, total length, thallus diameter, stipe width, number of branches, frond width, fouling, bleaching, gender, and photosynthetic efficiency). These results provide confidence for previous reports of this disease based upon visual assessments only, contribute to the development of monitoring and conservation strategies for safeguarding P. comosa forests, and generate insights into potential factors influencing host-pathogen interactions in this system.
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Affiliation(s)
- Juliana Ferrari
- Instituto de Biologia, Departamento de Biologia Marinha, Universidade Federal Fluminense, Outeiro de São Jõao Batista s/n, Niterói, RJ, 24.001-970, Brazil
- Instituto de Estudos do Mar Almirante Paulo Moreira, Arraial do Cabo, RJ, 28930-000, Brazil
- Centre for Marine Science and Innovation, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
- Sydney Institute of Marine Science, Mosman, NSW, 2088, Australia
| | - Priscila Goncalves
- Centre for Marine Science and Innovation, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Alexandra Helene Campbell
- Centre for Marine Science and Innovation, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
- Seaweed Research Group, University of the Sunshine Coast, 90 Sippy Downs Road, Sunshine Coast, Queensland, 4556, Australia
| | - Daniela Bueno Sudatti
- Instituto de Estudos do Mar Almirante Paulo Moreira, Arraial do Cabo, RJ, 28930-000, Brazil
- Universidade Federal Fluminense, Niterói, RJ, 24.001-970, Brazil
| | - Georgina Valentine Wood
- Centre for Marine Science and Innovation, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
- School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Torsten Thomas
- Centre for Marine Science and Innovation, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Renato Crespo Pereira
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, RJ, 22460-030, Brazil
- Universidade Federal Fluminense, Niterói, RJ, 24.001-970, Brazil
| | - Peter David Steinberg
- Centre for Marine Science and Innovation, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, 2052, Australia
- Sydney Institute of Marine Science, Mosman, NSW, 2088, Australia
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technical University, Singapore, 637551, Singapore
| | - Ezequiel Miguel Marzinelli
- Sydney Institute of Marine Science, Mosman, NSW, 2088, Australia
- School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW, 2006, Australia
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technical University, Singapore, 637551, Singapore
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Soares WS, Oliveira MMF, Botrel GBB, Rocha EAA, Silva MMDJ, da Silva BKR, Pereira RC, Alves FM, Gonçalves VAR, Fernandes FL. First record and economic losses of the passionflower caterpillar in two biomes from Brazil. BRAZ J BIOL 2021; 83:e246475. [PMID: 34231657 DOI: 10.1590/1519-6984.246475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 03/24/2021] [Indexed: 11/22/2022] Open
Affiliation(s)
- W S Soares
- Universidade Federal de Uberlândia - UFU, Instituto de Ciência Agrárias, Uberlândia, MG, Brasil
| | - M M F Oliveira
- Universidade Federal de Viçosa - UFV, Instituto de Ciências Agrárias, Rio Paranaíba, MG, Brasil
| | - G B B Botrel
- Universidade Federal de Viçosa - UFV, Instituto de Ciências Agrárias, Rio Paranaíba, MG, Brasil
| | - E A A Rocha
- Universidade Federal de Viçosa - UFV, Instituto de Ciências Agrárias, Rio Paranaíba, MG, Brasil
| | - M M de J Silva
- Universidade Federal de Viçosa - UFV, Instituto de Ciências Agrárias, Rio Paranaíba, MG, Brasil
| | - B K R da Silva
- Universidade Federal de Viçosa - UFV, Instituto de Ciências Agrárias, Rio Paranaíba, MG, Brasil
| | - R C Pereira
- Universidade Estadual do Norte Fluminense - UENF, Laboratório de Entomologia e Fitopatologia, Campos, RJ, Brasil
| | - F M Alves
- Universidade Federal de Viçosa - UFV, Instituto de Ciências Agrárias, Rio Paranaíba, MG, Brasil
| | - V A R Gonçalves
- Universidade Federal de Viçosa - UFV, Instituto de Ciências Agrárias, Rio Paranaíba, MG, Brasil
| | - F L Fernandes
- Universidade Federal de Viçosa - UFV, Instituto de Ciências Agrárias, Rio Paranaíba, MG, Brasil
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Pereira RC, Sudatti DB, Moreira TSG, Ventura CRR. Chemical defense in developmental stages and adult of the sea star Echinaster ( Othilia) brasiliensis. PeerJ 2021; 9:e11503. [PMID: 34178443 PMCID: PMC8216172 DOI: 10.7717/peerj.11503] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 05/03/2021] [Indexed: 11/25/2022] Open
Abstract
To date, evidence regarding the performance of secondary metabolites from larval stages of sea stars as an anti-predation defense relates only to a few species/specimens from a few geographic ranges. Unfortunately, this hinders a comprehensive global understanding of this inter-specific predator-prey interaction. Here, we present laboratory experimental evidence of chemical defense action in the early developmental stages and adults of the sea star Echinaster (Othilia) brasiliensis from Brazil against sympatric and allopatric invertebrate consumers. Blastulae, early and late brachiolarias of E. (O.) brasiliensis were not consumed by the sympatric and allopatric crabs Mithraculus forceps. Blastulae were also avoided by the sympatric and allopatric individuals of the anemone Anemonia sargassensis, but not the larval stages. Extracts from embryos (blastula) and brachiolarias of E. (O.) brasiliensis from one sampled population (João Fernandes beach) significantly inhibited the consumption by sympatric M. forceps, but not by allopatric crabs and A. sargassensi anemone. In this same site, extracts from adults E. (O.) brasiliensis significantly inhibited the consumption by sympatric and allopatric specimens of the crab in a range of concentrations. Whereas equivalent extract concentrations of E. (O.) brasiliensis from other population (Itaipu beach)inhibited the predation by allopatric M. forceps, while sympatric individuals of this crab avoided the only the higher level tested. Then, early stages and adult specimens of E. (O.) brasiliensis can be chemically defended against consumers, but this action is quite variable, depending on the type (anemone or crab) and the origin of the consumer (sympatric or allopatric).
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Affiliation(s)
- Renato Crespo Pereira
- Department of Marine Biology, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Daniela Bueno Sudatti
- Department of Marine Biology, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Thaise S G Moreira
- Department of Marine Biology, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | - Carlos Renato R Ventura
- Invertebrate Department, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
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Vieira Júnior J, Pereira RC, Soto RL, Cardoso IM, Mondino EA, Berbara R, Sá Mendonça E. Organic fertilization influences nematode diversity and maturity index in coffee tree plantations using an agroforestry system. J Nematol 2021; 53:e2021-54. [PMID: 34079952 PMCID: PMC8138876 DOI: 10.21307/jofnem-2021-054] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Indexed: 11/11/2022] Open
Abstract
In conventional coffee farming, soil fauna can be negatively affected by the intensive management practices adopted and the use of an agroforestry system (AFS) is an alternative to reduce these impacts. In coffee AFS, soil nutrition is provided mainly using organic fertilizers. This soil management favors the microbiota and can alter the population dynamics of some organisms. Our objective was to evaluate the effect of organic fertilizers on the nematode community in coffee AFS and to determine their impact on soil ecology. Soil samples were collected from three coffee AFS and a nearby Atlantic rainforest fragment. Nematodes were extracted from the samples and identified to the genus. The identified populations were compared using several community and diversity indices to determine the environmental conditions of the systems under evaluation. No differences in total abundance among nematode communities were found in the four areas evaluated. Regarding trophic groups, the coffee AFS treated with either cow manure or poultry litter favored the trophic group of bacterivores. Plant-parasitic nematodes were more abundant in soils of both the naturally fertilized coffee AFS and the Atlantic rainforest fragment. The maturity and structural indexes indicated that the Atlantic rainforest fragment and the naturally fertilized coffee AFS had similar ecological functions. On the other hand, soils fertilized with cow manure were less diverse, had higher dominance in the community, and showed less ecological stability. The nematode communities found in the AFS were similar to those seen in the forest fragment indicating that is possible to produce coffee sustainably without negatively affecting soil quality.
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Affiliation(s)
- Jol Vieira Júnior
- Department of Entomology and Plant Pathology, Universidade Estadual Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, Rio de Janeiro, Brazil
| | - R C Pereira
- Department of Entomology and Plant Pathology, Universidade Estadual Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, Rio de Janeiro, Brazil
| | - R L Soto
- Centro de Edafologia y Biología Aplicada del Segura, Murcia, Spain
| | - I M Cardoso
- Universidade Federal de Viçosa, Viçosa, Brazil
| | - E A Mondino
- Laboratório de Nematología IPADS Balcarce (INTA-CONICET) Ruta Nac. 226 Km. 73,5-CC 276, (B7620WAP) Balcarce, Buenos Aires, Argentina
| | - Rll Berbara
- Universidade Federal Rural do Rio de Janeiro, Seropédica, Rio de Janeiro, Brazil
| | - E Sá Mendonça
- Universidade Federal do Espírito Santo, Alegre, Brazil
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Nocchi N, Duarte HM, Pereira RC, Konno TUP, Soares AR. Effects of UV-B radiation on secondary metabolite production, antioxidant activity, photosynthesis and herbivory interactions in Nymphoides humboldtiana (Menyanthaceae). Journal of Photochemistry and Photobiology B: Biology 2020; 212:112021. [DOI: 10.1016/j.jphotobiol.2020.112021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 08/05/2020] [Accepted: 09/05/2020] [Indexed: 01/28/2023]
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Sudatti DB, Duarte HM, Soares AR, Salgado LT, Pereira RC. New Ecological Role of Seaweed Secondary Metabolites as Autotoxic and Allelopathic. Front Plant Sci 2020; 11:347. [PMID: 32523586 PMCID: PMC7261924 DOI: 10.3389/fpls.2020.00347] [Citation(s) in RCA: 5] [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] [Figures] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 03/09/2020] [Indexed: 06/11/2023]
Abstract
Allelopathy and autotoxicity are well-known biological processes in angiosperms but are very little explored or even unknown in seaweeds. In this study, extract and major pure compounds from two distinct populations of the red seaweed Laurencia dendroidea were investigated to evaluate the effect of autotoxicity through auto- and crossed experiments under laboratory conditions, using chlorophyll fluorescence imaging to measure inhibition of photosynthesis (ΦPSII) as a variable response. Individuals of L. dendroidea from Azeda beach were inhibited by their own extract (IC50 = 219 μg/ml) and the major compound elatol (IC50 = 87 μg/ml); both chemicals also inhibited this seaweed species from Forno beach (IC50 = 194 μg/ml for the extract and IC50 = 277 μg/ml for elatol). By contrast, the extract of L. dendroidea from Forno and its major compound obtusol showed no inhibitory effect in individuals of both populations; but obtusol was insoluble to be tested at higher concentrations, which could be active as observed for elatol. The Azeda population displayed higher susceptibility to the Azeda extract and to elatol, manifested on the first day, unlike Forno individuals, in which the effect was only detected on the second day; and inhibition of ΦPSII was more pronounced at apical than basal portions of the thalli of L. dendroidea. This first finding of seaweed autotoxicity and allelopathic effects revealed the potential of the chemistry of secondary metabolites for intra- and inter-populational interactions, and for structuring seaweed populations.
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Affiliation(s)
- Daniela Bueno Sudatti
- Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal Fluminense, Niterói, Brazil
| | - Heitor Monteiro Duarte
- Grupo de Produtos Naturais de Organismos Aquáticos (GPNOA), Núcleo de Estudos em Ecologia e Desenvolvimento Sócio-ambiental de Macaé, Universidade Federal do Rio de Janeiro, Macaé, Brazil
| | - Angélica Ribeiro Soares
- Grupo de Produtos Naturais de Organismos Aquáticos (GPNOA), Núcleo de Estudos em Ecologia e Desenvolvimento Sócio-ambiental de Macaé, Universidade Federal do Rio de Janeiro, Macaé, Brazil
| | | | - Renato Crespo Pereira
- Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal Fluminense, Niterói, Brazil
- Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, Brazil
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12
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Ank G, da Gama BAP, Pereira RC. Latitudinal variation in phlorotannin contents from Southwestern Atlantic brown seaweeds. PeerJ 2019; 7:e7379. [PMID: 31428540 PMCID: PMC6698132 DOI: 10.7717/peerj.7379] [Citation(s) in RCA: 5] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 06/29/2019] [Indexed: 11/30/2022] Open
Abstract
Phlorotannins are primary and/or secondary metabolites found exclusively in brown seaweeds, but their geographic distribution and abundance dynamic are not very well understood. In this study we evaluated the phlorotannin concentrations among and within-species of brown seaweeds in a broad latitudinal context (range of 21°) along the Brazilian coast (Southwestern Atlantic), using the Folin-Ciocalteau colorimetric method. In almost all species (16 out of 17) very low phlorotannin concentrations were found (<2.0%, dry weight for the species), confirming reports of the typical amounts of these chemicals in tropical brown seaweeds, but with significantly distinct values among seven different and probably highly structured populations. In all 17 seaweed species (but a total of 25 populations) analyzed there were significant differences on the amount of phlorotannins in different individuals (t-test, p < 0.01), with coefficients of variation (CV) ranging from 5.2% to 65.3%. The CV, but not the total amount of phlorotannins, was significantly correlated with latitude, and higher values of both these variables were found in brown seaweeds collected at higher latitudes. These results suggest that brown seaweeds from higher latitudes can produce phlorotannins in a wider range of amounts and probably as response to environmental variables or stimuli, compared to low latitude algae.
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Affiliation(s)
- Glaucia Ank
- Departamento de Biologia Marinha, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil
| | | | - Renato Crespo Pereira
- Departamento de Biologia Marinha, Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil.,Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, Brazil
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13
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Rebai M, Bertalot L, Brichard B, Brolatti G, Croci G, Esposito B, Fernandes A, Giacomelli L, Gorini G, Krasilnikov V, Lengar I, Marocco D, Muraro A, Nocente M, Pereira RC, Perelli Cippo E, Rigamonti D, Rzadkiewicz J, Sousa J, Tardocchi M. Design of gamma-ray spectrometers optimized for fast particle studies at ITER. Rev Sci Instrum 2018; 89:10I126. [PMID: 30399810 DOI: 10.1063/1.5038963] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 06/01/2018] [Indexed: 06/08/2023]
Abstract
A set of gamma ray spectrometers has been designed for ITER within the Radial Gamma Ray Spectrometer (RGRS) project. The aim of this project is designing a system, integrated with the ITER radial neutron camera, which is able to measure the gamma-rays emitted from the plasma with a good energy resolution (about 1.5% at 4.44 MeV) and at high counting rates (in excess of 1 MHz). The RGRS will be able to operate both in the D phase and in the full-power DT phase and will measure gamma rays from (i) reactions between fast ions, such as α particles, and light impurities and (ii) bremsstrahlung emission generated by runaway electron interactions with both plasma bulk and tokamak walls. The RGRS detectors are arranged in nine lines of sights (able to cover a radial region with r < a/3), each featuring a large LaBr3 scintillator crystal. Due to the high neutron flux and magnetic field, several solutions have been adopted to guarantee a good signal to background ratio and MHz counting rate capabilities. The RGRS is capable to combine space and energy distribution measurements of α particles and runaway electrons, which will help the study of the fast particle physics in a burning plasma.
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Affiliation(s)
- M Rebai
- Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche, Milano, Italy
| | - L Bertalot
- ITER Organization, Saint Paul Lez Durance Cedex, France
| | | | - G Brolatti
- ENEA C. R. Frascati, Dipartimento FSN, Frascati, Italy
| | - G Croci
- Dipartimento di Fisica "G. Occhialini," Università di Milano-Bicocca, Milano, Italy
| | - B Esposito
- ENEA C. R. Frascati, Dipartimento FSN, Frascati, Italy
| | - A Fernandes
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - L Giacomelli
- Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche, Milano, Italy
| | - G Gorini
- Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche, Milano, Italy
| | - V Krasilnikov
- ITER Organization, Saint Paul Lez Durance Cedex, France
| | - I Lengar
- Jozef Stefan Institute, Ljubljana, Slovenia
| | - D Marocco
- ENEA C. R. Frascati, Dipartimento FSN, Frascati, Italy
| | - A Muraro
- Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche, Milano, Italy
| | - M Nocente
- Dipartimento di Fisica "G. Occhialini," Università di Milano-Bicocca, Milano, Italy
| | - R C Pereira
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - E Perelli Cippo
- Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche, Milano, Italy
| | - D Rigamonti
- Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche, Milano, Italy
| | - J Rzadkiewicz
- National Center for Nuclear Research, NCBJ, Swierk, Warsaw, Poland
| | - J Sousa
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - M Tardocchi
- Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche, Milano, Italy
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14
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Nocente M, Shevelev A, Giacomelli L, Pautasso G, Tardocchi M, Gin D, Gobbin M, Gorini G, Fernandes A, Herrmann A, Khilkevitch E, Panontin E, Papp G, Pereira RC, Salewski M, Tardini G, Valisa M. High resolution gamma-ray spectrometer with MHz capabilities for runaway electron studies at ASDEX Upgrade. Rev Sci Instrum 2018; 89:10I124. [PMID: 30399910 DOI: 10.1063/1.5036658] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 05/16/2018] [Indexed: 06/08/2023]
Abstract
A new gamma-ray spectrometer with MHz capabilities has been developed to measure the bremsstrahlung emission spectrum in the gamma-ray energy band generated by MeV range runaway electrons in disruption experiments at ASDEX Upgrade. Properties of the runaway electrons are inferred from the measured bremsstrahlung spectrum by a deconvolution technique, particularly with regard to their maximum energy. Changes induced to the runaway electron velocity space are unambiguously observed both in massive gas injection and resonant magnetic perturbation experiments with the detector.
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Affiliation(s)
- M Nocente
- Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano, Italy
| | - A Shevelev
- Ioffe Institute, Saint Petersburg, Russian Federation
| | - L Giacomelli
- Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche, Milano, Italy
| | - G Pautasso
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - M Tardocchi
- Istituto di Fisica del Plasma, Consiglio Nazionale delle Ricerche, Milano, Italy
| | - D Gin
- Ioffe Institute, Saint Petersburg, Russian Federation
| | | | - G Gorini
- Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano, Italy
| | - A Fernandes
- Instituto de Plasmas e Fusao Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - A Herrmann
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - E Khilkevitch
- Ioffe Institute, Saint Petersburg, Russian Federation
| | - E Panontin
- Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano, Italy
| | - G Papp
- Max Planck Institute for Plasma Physics, Garching, Germany
| | - R C Pereira
- Instituto de Plasmas e Fusao Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - M Salewski
- Department of Physics, Technical University of Denmark, Kongens Lyngby, Denmark
| | - G Tardini
- Max Planck Institute for Plasma Physics, Garching, Germany
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15
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Rigamonti D, Broslawski A, Fernandes A, Figueiredo J, Giacomelli L, Gorini G, Gosk M, Kaveney G, Kiptily V, Korolczuk S, Murari A, Nocente M, Pereira RC, Popovichev S, Santos B, Urban A, Zychor I, Tardocchi M. The upgraded JET gamma-ray cameras based on high resolution/high count rate compact spectrometers. Rev Sci Instrum 2018; 89:10I116. [PMID: 30399923 DOI: 10.1063/1.5038839] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Accepted: 06/19/2018] [Indexed: 06/08/2023]
Abstract
The JET gamma-ray cameras have been recently upgraded within the gamma-ray camera upgrade project in support of development of JET high performance deuterium plasma scenarios and in preparation of deuterium-tritium experiments. New, dedicated detectors based on a LaBr3 crystal and silicon photo-multipliers have been developed and replaced pre-existing CsI detectors in all 19 channels. The new instrument gives opportunity of making two-dimensional gamma-ray measurements with a counting rate capability exceeding 1 MCounts/s (MCps) and energy resolution better than 5% at 1.1 MeV. The upgrade is of relevance for fast ion and runaway electron physics studies in high performance deuterium discharges and also in plasmas with tritium at neutron yields in the range up to about 5 × 1017 n/s.
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Affiliation(s)
- D Rigamonti
- EUROfusion Consortium, JET, Culham Science Centre, Abingdon OX14 3DB, United Kingdom
| | - A Broslawski
- Istituto di Fisica del Plasma "P. Caldirola", CNR, Milano, Italy
| | - A Fernandes
- Narodowe Centrum Badań Jądrowych (NCBJ), 05-400 Otwock-Swierk, Poland
| | - J Figueiredo
- Narodowe Centrum Badań Jądrowych (NCBJ), 05-400 Otwock-Swierk, Poland
| | - L Giacomelli
- EUROfusion Consortium, JET, Culham Science Centre, Abingdon OX14 3DB, United Kingdom
| | - G Gorini
- EUROfusion Consortium, JET, Culham Science Centre, Abingdon OX14 3DB, United Kingdom
| | - M Gosk
- Istituto di Fisica del Plasma "P. Caldirola", CNR, Milano, Italy
| | - G Kaveney
- Dipartimento di Fisica "G. Occhialini", Università degli Studi di Milano-Bicocca, Milano, Italy
| | - V Kiptily
- Dipartimento di Fisica "G. Occhialini", Università degli Studi di Milano-Bicocca, Milano, Italy
| | - S Korolczuk
- Istituto di Fisica del Plasma "P. Caldirola", CNR, Milano, Italy
| | - A Murari
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - M Nocente
- EUROfusion Consortium, JET, Culham Science Centre, Abingdon OX14 3DB, United Kingdom
| | - R C Pereira
- Narodowe Centrum Badań Jądrowych (NCBJ), 05-400 Otwock-Swierk, Poland
| | - S Popovichev
- Dipartimento di Fisica "G. Occhialini", Università degli Studi di Milano-Bicocca, Milano, Italy
| | - B Santos
- Narodowe Centrum Badań Jądrowych (NCBJ), 05-400 Otwock-Swierk, Poland
| | - A Urban
- Istituto di Fisica del Plasma "P. Caldirola", CNR, Milano, Italy
| | - I Zychor
- Istituto di Fisica del Plasma "P. Caldirola", CNR, Milano, Italy
| | - M Tardocchi
- EUROfusion Consortium, JET, Culham Science Centre, Abingdon OX14 3DB, United Kingdom
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16
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Fernandes FL, Fernandes MEDS, Costa NCR, Pereira RC, Dos Santos AL, Ribeiro RC. First report of leafminer Lyriomyza spp. in Daucus carota in Brazil. BRAZ J BIOL 2016; 77:655-656. [PMID: 27849253 DOI: 10.1590/1519-6984.03216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 05/20/2016] [Indexed: 11/22/2022] Open
Affiliation(s)
- F L Fernandes
- Instituto de Ciências Agrárias, Universidade Federal de Viçosa - UFV, Campus de Rio Paranaíba, MG 230, Km 8, CEP 38810-000, Rio Paranaíba, MG, Brazil
| | - M E De S Fernandes
- Instituto de Ciências Agrárias, Universidade Federal de Viçosa - UFV, Campus de Rio Paranaíba, MG 230, Km 8, CEP 38810-000, Rio Paranaíba, MG, Brazil
| | - N C R Costa
- Instituto de Ciências Agrárias, Universidade Federal de Viçosa - UFV, Campus de Rio Paranaíba, MG 230, Km 8, CEP 38810-000, Rio Paranaíba, MG, Brazil
| | - R C Pereira
- Laboratório de Biocontrole Farroupilha - Soluções Biológicas, Av. Júlia Fernandes Caixeta, 555, CEP 38706-420, Patos de Minas, MG, Brazil
| | - A L Dos Santos
- Instituto de Ciências Agrárias, Universidade Federal de Viçosa - UFV, Campus de Rio Paranaíba, MG 230, Km 8, CEP 38810-000, Rio Paranaíba, MG, Brazil
| | - R C Ribeiro
- Faculdade de Agronomia, Universidade Federal do Pará - UFPA, Campus Universitário do Tocantins-Cametá, Rua Padre Antônio Franco, 01, CEP 68400-000, Cametá, PA, Brazil
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17
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Calegario G, Pollier J, Arendt P, de Oliveira LS, Thompson C, Soares AR, Pereira RC, Goossens A, Thompson FL. Cloning and Functional Characterization of Cycloartenol Synthase from the Red Seaweed Laurencia dendroidea. PLoS One 2016; 11:e0165954. [PMID: 27832119 PMCID: PMC5104453 DOI: 10.1371/journal.pone.0165954] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Accepted: 10/20/2016] [Indexed: 01/08/2023] Open
Abstract
The red seaweed Laurencia dendroidea belongs to the Rhodophyta, a phylum of eukaryotic algae that is widely distributed across the oceans and that constitute an important source of bioactive specialized metabolites. Laurencia species have been studied since 1950 and were found to contain a plethora of specialized metabolites, mainly halogenated sesquiterpenes, diterpenes and triterpenes that possess a broad spectrum of pharmacological and ecological activities. The first committed step in the biosynthesis of triterpenes is the cyclization of 2,3-oxidosqualene, an enzymatic reaction carried out by oxidosqualene cyclases (OSCs), giving rise to a broad range of different compounds, such as the sterol precursors cycloartenol and lanosterol, or triterpene precursors such as cucurbitadienol and β-amyrin. Here, we cloned and characterized the first OSC from a red seaweed. The OSC gene was identified through mining of a L. dendroidea transcriptome dataset and subsequently cloned and heterologously expressed in yeast for functional characterization, which indicated that the corresponding enzyme cyclizes 2,3-oxidosqualene to the sterol precursor cycloartenol. Accordingly, the gene was named L. dendroidea cycloartenol synthase (LdCAS). A phylogenetic analysis using OSCs genes from plants, fungi and algae revealed that LdCAS grouped together with OSCs from other red algae, suggesting that cycloartenol could be the common product of the OSC in red seaweeds. Furthermore, profiling of L. dendroidea revealed cholesterol as the major sterol accumulating in this species, implicating red seaweeds contain a ‘hybrid’ sterol synthesis pathway in which the phytosterol precursor cycloartenol is converted into the major animal sterol cholesterol.
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Affiliation(s)
- Gabriela Calegario
- Departament of Marine Biology, Federal Fluminense University (UFF), Niterói, Brazil
- Institute of Biology, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
- SAGE-COPPE, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Jacob Pollier
- Department of Plant Systems Biology, VIB, Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Gent, Belgium
| | - Philipp Arendt
- Department of Plant Systems Biology, VIB, Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Gent, Belgium
| | - Louisi Souza de Oliveira
- Institute of Biology, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
- SAGE-COPPE, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Cristiane Thompson
- Institute of Biology, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
- SAGE-COPPE, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
| | - Angélica Ribeiro Soares
- Grupo de Produtos Naturais de Organismos Aquáticos (GPNOA), Núcleo de Estudos Em Ecologia e Desenvolvimento Sócioambiental de Macaé, Federal University of Rio de Janeiro (UFRJ), Macaé, Brazil
| | | | - Alain Goossens
- Department of Plant Systems Biology, VIB, Gent, Belgium
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Gent, Belgium
| | - Fabiano L. Thompson
- Institute of Biology, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
- SAGE-COPPE, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
- * E-mail:
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18
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Aguiam DE, Silva A, Bobkov V, Carvalho PJ, Carvalho PF, Cavazzana R, Conway GD, D'Arcangelo O, Fattorini L, Faugel H, Fernandes A, Fünfgelder H, Gonçalves B, Guimarais L, De Masi G, Meneses L, Noterdaeme JM, Pereira RC, Rocchi G, Santos JM, Tuccillo AA, Tudisco O. Implementation of the new multichannel X-mode edge density profile reflectometer for the ICRF antenna on ASDEX Upgrade. Rev Sci Instrum 2016; 87:11E722. [PMID: 27910673 DOI: 10.1063/1.4961558] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A new multichannel frequency modulated continuous-wave reflectometry diagnostic has been successfully installed and commissioned on ASDEX Upgrade to measure the plasma edge electron density profile evolution in front of the Ion Cyclotron Range of Frequencies (ICRF) antenna. The design of the new three-strap ICRF antenna integrates ten pairs (sending and receiving) of microwave reflectometry antennas. The multichannel reflectometer can use three of these to measure the edge electron density profiles up to 2 × 1019 m-3, at different poloidal locations, allowing the direct study of the local plasma layers in front of the ICRF antenna. ICRF power coupling, operational effects, and poloidal variations of the plasma density profile can be consistently studied for the first time. In this work the diagnostic hardware architecture is described and the obtained density profile measurements were used to track outer radial plasma position and plasma shape.
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Affiliation(s)
- D E Aguiam
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - A Silva
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - V Bobkov
- Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching, Germany
| | - P J Carvalho
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - P F Carvalho
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - R Cavazzana
- Consorzio RFX (CNR, ENEA, INFN, Universitá di Padova, Acciaierie Venete SpA), Corso Stati Uniti 4, 35127 Padova, Italy
| | - G D Conway
- Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching, Germany
| | - O D'Arcangelo
- ENEA, Dipartimento FSN, C. R. Frascati, Via E. Fermi 45, 00044 Frascati, Roma, Italy
| | - L Fattorini
- Universitá degli Studi Milano Bicocca, Dipartimento di Fisica, Piazza della Scienza 3, 20126 Milano, Italy
| | - H Faugel
- Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching, Germany
| | - A Fernandes
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - H Fünfgelder
- Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching, Germany
| | - B Gonçalves
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - L Guimarais
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - G De Masi
- Consorzio RFX (CNR, ENEA, INFN, Universitá di Padova, Acciaierie Venete SpA), Corso Stati Uniti 4, 35127 Padova, Italy
| | - L Meneses
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - J M Noterdaeme
- Max-Planck-Institut für Plasmaphysik, Boltzmannstr. 2, D-85748 Garching, Germany
| | - R C Pereira
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - G Rocchi
- ENEA, Dipartimento FSN, C. R. Frascati, Via E. Fermi 45, 00044 Frascati, Roma, Italy
| | - J M Santos
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
| | - A A Tuccillo
- ENEA, Dipartimento FSN, C. R. Frascati, Via E. Fermi 45, 00044 Frascati, Roma, Italy
| | - O Tudisco
- ENEA, Dipartimento FSN, C. R. Frascati, Via E. Fermi 45, 00044 Frascati, Roma, Italy
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19
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Rigamonti D, Muraro A, Nocente M, Perseo V, Boltruczyk G, Fernandes A, Figueiredo J, Giacomelli L, Gorini G, Gosk M, Kiptily V, Korolczuk S, Mianowski S, Murari A, Pereira RC, Cippo EP, Zychor I, Tardocchi M. Performance of the prototype LaBr 3 spectrometer developed for the JET gamma-ray camera upgrade. Rev Sci Instrum 2016; 87:11E717. [PMID: 27910639 DOI: 10.1063/1.4961060] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, we describe the solution developed by the gamma ray camera upgrade enhancement project to improve the spectroscopic properties of the existing JET γ-ray camera. Aim of the project is to enable gamma-ray spectroscopy in JET deuterium-tritium plasmas. A dedicated pilot spectrometer based on a LaBr3 crystal coupled to a silicon photo-multiplier has been developed. A proper pole zero cancellation network able to shorten the output signal to a length of 120 ns has been implemented allowing for spectroscopy at MHz count rates. The system has been characterized in the laboratory and shows an energy resolution of 5.5% at Eγ = 0.662 MeV, which extrapolates favorably in the energy range of interest for gamma-ray emission from fast ions in fusion plasmas.
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Affiliation(s)
- D Rigamonti
- Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano, Italy
| | - A Muraro
- Istituto di Fisica del Plasma "P. Caldirola," CNR, Milano, Italy
| | - M Nocente
- Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano, Italy
| | - V Perseo
- Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano, Italy
| | - G Boltruczyk
- Narodowe Centrum Badań Jądrowych (NCBJ), 05-400 Otwock-Swierk, Poland
| | - A Fernandes
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - J Figueiredo
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - L Giacomelli
- Istituto di Fisica del Plasma "P. Caldirola," CNR, Milano, Italy
| | - G Gorini
- Dipartimento di Fisica "G. Occhialini," Università degli Studi di Milano-Bicocca, Milano, Italy
| | - M Gosk
- Narodowe Centrum Badań Jądrowych (NCBJ), 05-400 Otwock-Swierk, Poland
| | - V Kiptily
- Culham Science Centre for Fusion Energy, Culham, United Kingdom
| | - S Korolczuk
- Narodowe Centrum Badań Jądrowych (NCBJ), 05-400 Otwock-Swierk, Poland
| | - S Mianowski
- Narodowe Centrum Badań Jądrowych (NCBJ), 05-400 Otwock-Swierk, Poland
| | - A Murari
- EUROfusion Programme Management Unit, Culham Science Centre, OX14 3DB Abingdon, United Kingdom
| | - R C Pereira
- Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - E P Cippo
- Istituto di Fisica del Plasma "P. Caldirola," CNR, Milano, Italy
| | - I Zychor
- Narodowe Centrum Badań Jądrowych (NCBJ), 05-400 Otwock-Swierk, Poland
| | - M Tardocchi
- Istituto di Fisica del Plasma "P. Caldirola," CNR, Milano, Italy
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Paradas WC, Tavares Salgado L, Pereira RC, Hellio C, Atella GC, de Lima Moreira D, do Carmo APB, Soares AR, Menezes Amado-Filho G. A Novel Antifouling Defense Strategy from Red Seaweed: Exocytosis and Deposition of Fatty Acid Derivatives at the Cell Wall Surface. Plant Cell Physiol 2016; 57:1008-1019. [PMID: 26936789 DOI: 10.1093/pcp/pcw039] [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] [Received: 10/02/2015] [Accepted: 02/16/2016] [Indexed: 06/05/2023]
Abstract
We investigated the organelles involved in the biosynthesis of fatty acid (FA) derivatives in the cortical cells of Laurencia translucida (Rhodophyta) and the effect of these compounds as antifouling (AF) agents. A bluish autofluorescence (with emission at 500 nm) within L. translucida cortical cells was observed above the thallus surface via laser scanning confocal microscopy (LSCM). A hexanic extract (HE) from L. translucida was split into two isolated fractions called hydrocarbon (HC) and lipid (LI), which were subjected to HPLC coupled to a fluorescence detector, and the same autofluorescence pattern as observed by LSCM analyses (emission at 500 nm) was revealed in the LI fraction. These fractions were analyzed by gas chromatography-mass spectrometry (GC-MS), which revealed that docosane is the primary constituent of HC, and hexadecanoic acid and cholesterol trimethylsilyl ether are the primary components of LI. Nile red (NR) labeling (lipid fluorochrome) presented a similar cellular localization to that of the autofluorescent molecules. Transmission and scanning electron microscopy (TEM and SEM) revealed vesicle transport processes involving small electron-lucent vesicles, from vacuoles to the inner cell wall. Both fractions (HC and LI) inhibited micro-fouling [HC, lower minimum inhibitory concentration (MIC) values of 0.1 µg ml(-1); LI, lower MIC value of 10 µg ml(-1)]. The results suggested that L. translucida cortical cells can produce FA derivatives (e.g. HCs and FAs) and secrete them to the thallus surface, providing a unique and novel protective mechanism against microfouling colonization in red algae.
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Affiliation(s)
- Wladimir Costa Paradas
- Diretoria de Pesquisas, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, 22460-030, Brazil
| | - Leonardo Tavares Salgado
- Diretoria de Pesquisas, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, 22460-030, Brazil
| | - Renato Crespo Pereira
- Departamento de Biologia Marinha, Universidade Federal Fluminense, Niterói, 100644, Brazil
| | - Claire Hellio
- Biodimar/LEMAR/IUEM, Université de Bretagne Occidentale (UBO), 6 Avenue Victor Le Gorgeu, CS93837, Brest cedex 3 29238, France
| | - Georgia Correa Atella
- Departamento de Bioquimica Médica, Universidade Federal do Rio de Janeiro, Rio de Janeiro, 21941-590, Brazil
| | - Davyson de Lima Moreira
- Instituto de Tecnologia em Fármacos, Instituto Oswaldo Cruz, Rio de Janeiro, 21041-250, Brazil
| | | | - Angélica Ribeiro Soares
- Núcleo de Pesquisas em Ecologia e Desenvolvimento Social de Macaé, Universidade Federal do Rio de Janeiro, Macaé, 27910-970, Brazil
| | - Gilberto Menezes Amado-Filho
- Diretoria de Pesquisas, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rio de Janeiro, 22460-030, Brazil
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Sudatti DB, Fujii MT, Rodrigues SV, Turra A, Duarte HM, Soares AR, Pereira RC. Diel variation of sesquiterpene elatol production: a chemical defense mechanism of the red seaweed Laurencia dendroidea. BIOCHEM SYST ECOL 2016. [DOI: 10.1016/j.bse.2015.12.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [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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22
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Fistarol GO, Coutinho FH, Moreira APB, Venas T, Cánovas A, de Paula SEM, Coutinho R, de Moura RL, Valentin JL, Tenenbaum DR, Paranhos R, do Valle RDAB, Vicente ACP, Amado Filho GM, Pereira RC, Kruger R, Rezende CE, Thompson CC, Salomon PS, Thompson FL. Environmental and Sanitary Conditions of Guanabara Bay, Rio de Janeiro. Front Microbiol 2015; 6:1232. [PMID: 26635734 PMCID: PMC4653747 DOI: 10.3389/fmicb.2015.01232] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 10/22/2015] [Indexed: 11/26/2022] Open
Abstract
Guanabara Bay is the second largest bay in the coast of Brazil, with an area of 384 km2. In its surroundings live circa 16 million inhabitants, out of which 6 million live in Rio de Janeiro city, one of the largest cities of the country, and the host of the 2016 Olympic Games. Anthropogenic interference in Guanabara Bay area started early in the XVI century, but environmental impacts escalated from 1930, when this region underwent an industrialization process. Herein we present an overview of the current environmental and sanitary conditions of Guanabara Bay, a consequence of all these decades of impacts. We will focus on microbial communities, how they may affect higher trophic levels of the aquatic community and also human health. The anthropogenic impacts in the bay are flagged by heavy eutrophication and by the emergence of pathogenic microorganisms that are either carried by domestic and/or hospital waste (e.g., virus, KPC-producing bacteria, and fecal coliforms), or that proliferate in such conditions (e.g., vibrios). Antibiotic resistance genes are commonly found in metagenomes of Guanabara Bay planktonic microorganisms. Furthermore, eutrophication results in recurrent algal blooms, with signs of a shift toward flagellated, mixotrophic groups, including several potentially harmful species. A recent large-scale fish kill episode, and a long trend decrease in fish stocks also reflects the bay’s degraded water quality. Although pollution of Guanabara Bay is not a recent problem, the hosting of the 2016 Olympic Games propelled the government to launch a series of plans to restore the bay’s water quality. If all plans are fully implemented, the restoration of Guanabara Bay and its shores may be one of the best legacies of the Olympic Games in Rio de Janeiro.
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Affiliation(s)
- Giovana O Fistarol
- Institute of Biology, Federal University of Rio de Janeiro Rio de Janeiro, Brazil ; Laboratório de Sistemas Avançados de Gestão da Produção, COPPE, Federal University of Rio de Janeiro Rio de Janeiro, Brazil
| | - Felipe H Coutinho
- Institute of Biology, Federal University of Rio de Janeiro Rio de Janeiro, Brazil ; Centre for Molecular and Biomolecular Informatics, Radboud Institute for Molecular Life Sciences, Radboud University Medical Centre Nijmegen, Netherlands
| | - Ana Paula B Moreira
- Institute of Biology, Federal University of Rio de Janeiro Rio de Janeiro, Brazil
| | - Tainá Venas
- Institute of Biology, Federal University of Rio de Janeiro Rio de Janeiro, Brazil
| | - Alba Cánovas
- Laboratório de Sistemas Avançados de Gestão da Produção, COPPE, Federal University of Rio de Janeiro Rio de Janeiro, Brazil
| | - Sérgio E M de Paula
- Laboratório de Sistemas Avançados de Gestão da Produção, COPPE, Federal University of Rio de Janeiro Rio de Janeiro, Brazil
| | - Ricardo Coutinho
- Instituto de Estudos do Mar Almirante Paulo Moreira Rio de Janeiro, Brazil
| | - Rodrigo L de Moura
- Institute of Biology, Federal University of Rio de Janeiro Rio de Janeiro, Brazil
| | - Jean Louis Valentin
- Institute of Biology, Federal University of Rio de Janeiro Rio de Janeiro, Brazil
| | - Denise R Tenenbaum
- Institute of Biology, Federal University of Rio de Janeiro Rio de Janeiro, Brazil
| | - Rodolfo Paranhos
- Institute of Biology, Federal University of Rio de Janeiro Rio de Janeiro, Brazil
| | - Rogério de A B do Valle
- Laboratório de Sistemas Avançados de Gestão da Produção, COPPE, Federal University of Rio de Janeiro Rio de Janeiro, Brazil
| | | | | | - Renato Crespo Pereira
- Laboratory of Marine Chemical Ecology, Insitute of Biology, Federal Fluminense University Niteroi, Brazil
| | - Ricardo Kruger
- Laboratory of Enzimology, Institute of Biology, University of Brasília Brasília, Brazil
| | | | - Cristiane C Thompson
- Institute of Biology, Federal University of Rio de Janeiro Rio de Janeiro, Brazil
| | - Paulo S Salomon
- Institute of Biology, Federal University of Rio de Janeiro Rio de Janeiro, Brazil ; Laboratório de Sistemas Avançados de Gestão da Produção, COPPE, Federal University of Rio de Janeiro Rio de Janeiro, Brazil
| | - Fabiano L Thompson
- Institute of Biology, Federal University of Rio de Janeiro Rio de Janeiro, Brazil ; Laboratório de Sistemas Avançados de Gestão da Produção, COPPE, Federal University of Rio de Janeiro Rio de Janeiro, Brazil
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Miguel Bianco É, Martins Francisco T, Basílio Pinheiro C, Bagueira de Vasconcellos Azeredo R, Laneuville Teixeira V, Crespo Pereira R. 4α-Acetoxyamijidictyol - A New Antifeeding Dolastane Diterpene from the Brazilian Brown Alga Canistrocarpus cervicornis. Chem Biodivers 2015; 12:1665-77. [PMID: 26567945 DOI: 10.1002/cbdv.201400410] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2014] [Indexed: 11/09/2022]
Abstract
Chemical investigation of the CH2 Cl2 crude extract from the brown alga Canistrocarpus cervicornis (Dictyotaceae) led to isolation of one new (1) and four previously reported dolastane diterpenes (2-5). Their structures were characterized by 1D- and 2D-NMR spectroscopic techniques, including a full single crystal X-ray diffraction analysis for 1, 2, and 4. In addition, the new structure 1 was assayed as chemical defense inhibiting the feeding by the sea urchin Lytechinus variegatus. This study constitutes an additional report broadening the known spectrum of action and defensive roles of secondary metabolites of the C. cervicornis and Dictyotales species.
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Affiliation(s)
- Éverson Miguel Bianco
- Programa de Pós-graduação em Química, Departamento de Química, Fundação Universidade Regional de Blumenau, Campus 1, Bloco S, Victor Konder, CEP 89012-900, Blumenau, SC, Brazil, (phone: +55-47-33210615).
- Programa de Pós-graduação em Química Orgânica, Instituto de Química, Universidade Federal Fluminense, Outeiro de São João Baptista, Campus do Valonguinho, s/n, CEP 24020-150, Niterói, RJ, Brazil.
| | - Thiago Martins Francisco
- Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Campus da Pampulha, P. O. Box 702, 30123-970, Belo Horizonte, MG, Brazil
| | - Carlos Basílio Pinheiro
- Departamento de Física, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Campus da Pampulha, P. O. Box 702, 30123-970, Belo Horizonte, MG, Brazil
| | - Rodrigo Bagueira de Vasconcellos Azeredo
- Programa de Pós-graduação em Química Orgânica, Instituto de Química, Universidade Federal Fluminense, Outeiro de São João Baptista, Campus do Valonguinho, s/n, CEP 24020-150, Niterói, RJ, Brazil
| | - Valéria Laneuville Teixeira
- Programa de Pós-graduação em Química Orgânica, Instituto de Química, Universidade Federal Fluminense, Outeiro de São João Baptista, Campus do Valonguinho, s/n, CEP 24020-150, Niterói, RJ, Brazil
- Departamento de Biologia Marinha, Instituto de Biologia, Outeiro de São João Baptista, Campus do Valonguinho, s/n, P. O. Box 100.644, CEP 24001-970, Niterói, RJ, Brazil
| | - Renato Crespo Pereira
- Programa de Pós-graduação em Química Orgânica, Instituto de Química, Universidade Federal Fluminense, Outeiro de São João Baptista, Campus do Valonguinho, s/n, CEP 24020-150, Niterói, RJ, Brazil
- Departamento de Biologia Marinha, Instituto de Biologia, Outeiro de São João Baptista, Campus do Valonguinho, s/n, P. O. Box 100.644, CEP 24001-970, Niterói, RJ, Brazil
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Meirelles PM, Gadelha LMR, Francini-Filho RB, de Moura RL, Amado-Filho GM, Bastos AC, Paranhos RPDR, Rezende CE, Swings J, Siegle E, Asp Neto NE, Leitão SN, Coutinho R, Mattoso M, Salomon PS, Valle RAB, Pereira RC, Kruger RH, Thompson C, Thompson FL. BaMBa: towards the integrated management of Brazilian marine environmental data. Database (Oxford) 2015; 2015:bav088. [PMID: 26454874 PMCID: PMC4600340 DOI: 10.1093/database/bav088] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 08/24/2015] [Indexed: 11/12/2022]
Abstract
A new open access database, Brazilian Marine Biodiversity (BaMBa) (https://marinebiodiversity.lncc.br), was developed in order to maintain large datasets from the Brazilian marine environment. Essentially, any environmental information can be added to BaMBa. Certified datasets obtained from integrated holistic studies, comprising physical-chemical parameters, -omics, microbiology, benthic and fish surveys can be deposited in the new database, enabling scientific, industrial and governmental policies and actions to be undertaken on marine resources. There is a significant number of databases, however BaMBa is the only integrated database resource both supported by a government initiative and exclusive for marine data. BaMBa is linked to the Information System on Brazilian Biodiversity (SiBBr, http://www.sibbr.gov.br/) and will offer opportunities for improved governance of marine resources and scientists' integration. Database URL: http://marinebiodiversity.lncc.br.
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Affiliation(s)
- Pedro Milet Meirelles
- Institute of Biology, Federal University of Rio de Janeiro (UFRJ), Av. Carlos Chagas Filho 373 Sala A1-050, Bloco A do CCS Cidade Universitária, 21941-902 - Rio de Janeiro, RJ, Brazil, Federal University of Rio de Janeiro (UFRJ) / COPPE, SAGE, Rua Moniz Aragão 360, Bloco 2, Ilha do Fundão, 21945-972 - Rio de Janeiro, RJ, Brazil
| | - Luiz M R Gadelha
- National Laboratory for Scientific Computing (LNCC), Av. Getúlio Vargas 333, Quitandinha, 25651-075 - Petropolis, RJ, Brazil
| | - Ronaldo Bastos Francini-Filho
- Department of Environment and Engineering, Federal University of Paraíba, Rio Tinto, Brazil (UFPB), Rua da Mangueira, s/n - Campus IV (Litoral Norte), Centro, 58297-000 - Rio Tinto, PB, Brazil
| | - Rodrigo Leão de Moura
- Institute of Biology, Federal University of Rio de Janeiro (UFRJ), Av. Carlos Chagas Filho 373 Sala A1-050, Bloco A do CCS Cidade Universitária, 21941-902 - Rio de Janeiro, RJ, Brazil, Federal University of Rio de Janeiro (UFRJ) / COPPE, SAGE, Rua Moniz Aragão 360, Bloco 2, Ilha do Fundão, 21945-972 - Rio de Janeiro, RJ, Brazil
| | - Gilberto Menezes Amado-Filho
- Rio de Janeiro Botanical Garden Research Institute (IP-JBRJ), Rua Pacheco Leão 915, Horto, 22460-030 - Rio de Janeiro, RJ, Brazil
| | - Alex Cardoso Bastos
- Department of Oceanography and Ecology, Federal University of Espírito Santo (UFES), Av. Fernando Ferrari, 514, Goiabeiras, 29090-600 - Vitória, ES Brazil
| | - Rodolfo Pinheiro da Rocha Paranhos
- Institute of Biology, Federal University of Rio de Janeiro (UFRJ), Av. Carlos Chagas Filho 373 Sala A1-050, Bloco A do CCS Cidade Universitária, 21941-902 - Rio de Janeiro, RJ, Brazil
| | - Carlos Eduardo Rezende
- Environmental Sciences Laboratory (LCA), Northern Rio de Janeiro State University Darcy Ribeiro (UENF), Avenida Alberto Lamego 2000, Parque Califórnia, 28013-602 - Campos dos Goytacazes, RJ, Brazil
| | - Jean Swings
- Institute of Biology, Federal University of Rio de Janeiro (UFRJ), Av. Carlos Chagas Filho 373 Sala A1-050, Bloco A do CCS Cidade Universitária, 21941-902 - Rio de Janeiro, RJ, Brazil, Federal University of Rio de Janeiro (UFRJ) / COPPE, SAGE, Rua Moniz Aragão 360, Bloco 2, Ilha do Fundão, 21945-972 - Rio de Janeiro, RJ, Brazil
| | - Eduardo Siegle
- Oceanographic Institute, University of São Paulo (IO-USP), Praça do Oceanográfico, 191, Cidade Universitária, 05508-120 - Sao Paulo, SP, Brazil
| | - Nils Edvin Asp Neto
- Institute of Coastal Studies, Federal University of Para (UFPA), Alameda Leandro Ribeiro, s/n. - Bairro Aldeia, UFPA/Campus Universitário de Bragança Aldeia, 68600-000 - Braganca, PA, Brasil
| | - Sigrid Neumann Leitão
- Department of Oceanography, Federal University of Pernambuco (UFPE), Av Arquitetura, S/N, Cidade Universitaria, 50670-901 - Recife, PE, Brazil
| | - Ricardo Coutinho
- Division of Marine Biotechnology, Marine Studies Institute Admiral Paulo Moreira, Rua Kioto 253, Praia dos Anjos, 28930-000 - Arraial do Cabo, RJ, Brazil
| | - Marta Mattoso
- PESC/COPPE - Federal University of Rio de Janeiro, Centro de Tecnologia, Bloco H, sala 319, Ilha do Fundão, 21941972 - Rio de Janeiro, RJ, Brazil
| | - Paulo S Salomon
- Institute of Biology, Federal University of Rio de Janeiro (UFRJ), Av. Carlos Chagas Filho 373 Sala A1-050, Bloco A do CCS Cidade Universitária, 21941-902 - Rio de Janeiro, RJ, Brazil, Federal University of Rio de Janeiro (UFRJ) / COPPE, SAGE, Rua Moniz Aragão 360, Bloco 2, Ilha do Fundão, 21945-972 - Rio de Janeiro, RJ, Brazil
| | - Rogério A B Valle
- Federal University of Rio de Janeiro (UFRJ) / COPPE, SAGE, Rua Moniz Aragão 360, Bloco 2, Ilha do Fundão, 21945-972 - Rio de Janeiro, RJ, Brazil
| | - Renato Crespo Pereira
- Departament of Marine Biology, Federal Fluminense University (UFF), Morro do Valonguinho s/n, Centro, 24001-970 - Niteroi, RJ, Brazil, and
| | - Ricardo Henrique Kruger
- Laboratory of Enzymology, Department of cellular Biology, Institute of Biology, University of Brasília (UnB), Asa Norte 70910-900 - Brasília, DF - Brazil
| | - Cristiane Thompson
- Institute of Biology, Federal University of Rio de Janeiro (UFRJ), Av. Carlos Chagas Filho 373 Sala A1-050, Bloco A do CCS Cidade Universitária, 21941-902 - Rio de Janeiro, RJ, Brazil, National Laboratory for Scientific Computing (LNCC), Av. Getúlio Vargas 333, Quitandinha, 25651-075 - Petropolis, RJ, Brazil
| | - Fabiano L Thompson
- Institute of Biology, Federal University of Rio de Janeiro (UFRJ), Av. Carlos Chagas Filho 373 Sala A1-050, Bloco A do CCS Cidade Universitária, 21941-902 - Rio de Janeiro, RJ, Brazil, National Laboratory for Scientific Computing (LNCC), Av. Getúlio Vargas 333, Quitandinha, 25651-075 - Petropolis, RJ, Brazil,
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Pereira RC, Costa-Pinto AR, Frias AM, Neves NM, Azevedo HS, Reis RL. In vitro chondrogenic commitment of human Wharton's jelly stem cells by co-culture with human articular chondrocytes. J Tissue Eng Regen Med 2015; 11:1876-1887. [PMID: 27035732 DOI: 10.1002/term.2085] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 07/11/2015] [Indexed: 11/09/2022]
Abstract
Wharton's jelly stem cells (WJSCs) are a potential source of transplantable stem cells in cartilage-regenerative strategies, due to their highly proliferative and multilineage differentiation capacity. We hypothesized that a non-direct co-culture system with human articular chondrocytes (hACs) could enhance the potential chondrogenic phenotype of hWJSCs during the expansion phase compared to those expanded in monoculture conditions. Primary hWJSCs were cultured in the bottom of a multiwell plate separated by a porous transwell membrane insert seeded with hACs. No statistically significant differences in hWJSCs duplication number were observed under either of the culture conditions during the expansion phase. hWJSCs under co-culture conditions show upregulations of collagen type I and II, COMP, TGFβ1 and aggrecan, as well as of the main cartilage transcription factor, SOX9, when compared to those cultured in the absence of chondrocytes. Chondrogenic differentiation of hWJSCs, previously expanded in co-culture and monoculture conditions, was evaluated for each cellular passage using the micromass culture model. Cells expanded in co-culture showed higher accumulation of glycosaminoglycans (GAGs) compared to cells in monoculture, and immunohistochemistry for localization of collagen type I revealed a strong detection signal when hWJSCs were expanded under monoculture conditions. In contrast, type II collagen was detected when cells were expanded under co-culture conditions, where numerous round-shaped cell clusters were observed. Using a micromass differentiation model, hWJSCs, previously exposed to soluble factors secreted by hACs, were able to express higher levels of chondrogenic genes with deposition of cartilage extracellular matrix components, suggesting their use as an alternative cell source for treating degenerated cartilage. Copyright © 2015 John Wiley & Sons, Ltd.
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Affiliation(s)
- R C Pereira
- 3Bs Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Guimarães, Portugal.,ICVS/3Bs PT Government-associated Laboratory, Braga/Guimarães, Portugal
| | - A R Costa-Pinto
- 3Bs Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Guimarães, Portugal.,ICVS/3Bs PT Government-associated Laboratory, Braga/Guimarães, Portugal
| | - A M Frias
- 3Bs Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Guimarães, Portugal.,ICVS/3Bs PT Government-associated Laboratory, Braga/Guimarães, Portugal
| | - N M Neves
- 3Bs Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Guimarães, Portugal.,ICVS/3Bs PT Government-associated Laboratory, Braga/Guimarães, Portugal
| | - H S Azevedo
- 3Bs Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Guimarães, Portugal.,ICVS/3Bs PT Government-associated Laboratory, Braga/Guimarães, Portugal
| | - R L Reis
- 3Bs Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Guimarães, Portugal.,ICVS/3Bs PT Government-associated Laboratory, Braga/Guimarães, Portugal
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27
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Paradas WC, Crespo TM, Salgado LT, de Andrade LR, Soares AR, Hellio C, Paranhos RR, Hill LJ, de Souza GM, Kelecom AGAC, Da Gama BAP, Pereira RC, Amado-Filho GM. Mevalonosomes: specific vacuoles containing the mevalonate pathway in Plocamium brasiliense cortical cells (Rhodophyta). J Phycol 2015; 51:225-235. [PMID: 26986518 DOI: 10.1111/jpy.12270] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Accepted: 01/21/2015] [Indexed: 06/05/2023]
Abstract
This paper has identified, for the first time in a member of the Rhodophyta, a vacuolar organelle containing enzymes that are involved in the mevalonate pathway-an important step in red algal isoprenoid biosynthesis. These organelles were named mevalonosomes (Mev) and were found in the cortical cells (CC) of Plocamium brasiliense, a marine macroalgae that synthesizes several halogenated monoterpenes. P. brasiliense specimens were submitted to a cytochemical analysis of the activity of the 3-hydroxy-3-methylglutaryl-CoA synthase (HMGS). Using transmission electron microscopy (TEM), we confirmed the presence of HMGS activity within the Mev. Because HMGS is necessary for the biosynthesis of halogenated monoterpenes, we isolated a hexanic fraction (HF) rich in halogenated monoterpenes from P. brasiliense that contained a pentachlorinated monoterpene as a major metabolite. Because terpenes are often related to chemical defense, the antifouling (AF) activity of pentachlorinated monoterpene was tested. We found that the settlement of the mussel Perna perna was reduced by HF treatment (2.25 times less than control; 40% and 90% of fouled surface, respectively; P = 0.001; F9,9 = 1.13). The HF (at 10 μg · mL(-1) ) also inhibited three species of fouling microalgae (Chlorarachnion reptans, Cylindrotheca cloisterium, and Exanthemachrysis gayraliae), while at a higher concentration (50 μg · mL(-1) ), it inhibited the bacteria Halomonas marina, Polaribacter irgensii, Pseudoalteromonas elyakovii, Shewanella putrefaciens, and Vibrio aestuarianus. The AF activity of P. brasiliense halogenated monoterpenes and the localization of HMGS activity inside Mev suggest that this cellular structure found in CC may play a role in thallus protection against biofouling.
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Affiliation(s)
- Wladimir Costa Paradas
- Departamento de Biologia Marinha, Universidade Federal Fluminense, Outeiro São João Batista, s/no., Niterói, Rio de Janeiro, Brazil
| | - Thalita Mendes Crespo
- Diretoria de Pesquisas, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão, 915, Rio de Janeiro, Brazil
| | - Leonardo Tavares Salgado
- Diretoria de Pesquisas, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão, 915, Rio de Janeiro, Brazil
| | - Leonardo Rodrigues de Andrade
- Centro de Ciências da Saúde, Instituto de Ciências Biomédicas, Departamento de Histologia e Embriologia, Universidade Federal do Rio de Janeiro (UFRJ), Av. Carlos Chagas Filho, 373, bloco: B, sala F2-27, Rio de Janeiro, Brazil
| | - Angélica Ribeiro Soares
- Núcleo de Pesquisas em Ecologia e Desenvolvimento Social de Macaé, Universidade Federal do Rio de Janeiro, Rua Rotary Club, s/no., São José do Barreto, Macaé, Rio de Janeiro, Brazil
| | - Claire Hellio
- Université de Bretagne Occidentale, LEMAR UMR 6539, IUEM - Technopole Brest-Iroise, Rue Dumont d'Urville, Plouzané, France
| | - Ricardo Rogers Paranhos
- Departamento de Biologia Marinha, Universidade Federal Fluminense, Outeiro São João Batista, s/no., Niterói, Rio de Janeiro, Brazil
| | - Lilian Jorge Hill
- Diretoria de Pesquisas, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão, 915, Rio de Janeiro, Brazil
| | - Geysa Marinho de Souza
- Diretoria de Pesquisas, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão, 915, Rio de Janeiro, Brazil
| | | | - Bernardo Antônio Perez Da Gama
- Departamento de Biologia Marinha, Universidade Federal Fluminense, Outeiro São João Batista, s/no., Niterói, Rio de Janeiro, Brazil
| | - Renato Crespo Pereira
- Departamento de Biologia Marinha, Universidade Federal Fluminense, Outeiro São João Batista, s/no., Niterói, Rio de Janeiro, Brazil
| | - Gilberto Menezes Amado-Filho
- Diretoria de Pesquisas, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão, 915, Rio de Janeiro, Brazil
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de Oliveira LS, Tschoeke DA, de Oliveira AS, Hill LJ, Paradas WC, Salgado LT, Thompson CC, Pereira RC, Thompson FL. New Insights on the terpenome of the red seaweed Laurencia dendroidea (Florideophyceae, Rhodophyta). Mar Drugs 2015; 13:879-902. [PMID: 25675000 PMCID: PMC4344607 DOI: 10.3390/md13020879] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [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: 09/14/2014] [Revised: 12/17/2014] [Accepted: 01/12/2015] [Indexed: 12/14/2022] Open
Abstract
The red seaweeds belonging to the genus Laurencia are well known as halogenated secondary metabolites producers, mainly terpenoids and acetogennins. Several of these chemicals exhibit important ecological roles and biotechnological applications. However, knowledge regarding the genes involved in the biosynthesis of these compounds is still very limited. We detected 20 different genes involved in the biosynthesis of terpenoid precursors, and 21 different genes coding for terpene synthases that are responsible for the chemical modifications of the terpenoid precursors, resulting in a high diversity of carbon chemical skeletons. In addition, we demonstrate through molecular and cytochemical approaches the occurrence of the mevalonate pathway involved in the biosynthesis of terpenes in L. dendroidea. This is the first report on terpene synthase genes in seaweeds, enabling further studies on possible heterologous biosynthesis of terpenes from L. dendroidea exhibiting ecological or biotechnological interest.
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Affiliation(s)
- Louisi Souza de Oliveira
- Institute of Biology, Federal University of Rio de Janeiro (UFRJ) Av. Carlos Chagas Filho, 373-CCS-IB-BLOCO A (ANEXO) A3-202, SAGE-COPPE, Rio de Janeiro 21941-599, Brazil.
| | - Diogo Antonio Tschoeke
- Institute of Biology, Federal University of Rio de Janeiro (UFRJ) Av. Carlos Chagas Filho, 373-CCS-IB-BLOCO A (ANEXO) A3-202, SAGE-COPPE, Rio de Janeiro 21941-599, Brazil.
| | - Aline Santos de Oliveira
- Federal Institute of Education, Science and Technology of Rio de Janeiro (IFRJ), Campus Duque de Caxias, Avenida República do Paraguai, 120, Sarapuí, Duque de Caxias 25050-100, Brazil.
| | - Lilian Jorge Hill
- Research Institute of the Botanical Garden of Rio de Janeiro, Rua Pacheco Leão, 915, Jardim Botânico, Rio de Janeiro 22460-030, Brazil.
| | - Wladimir Costa Paradas
- Research Institute of the Botanical Garden of Rio de Janeiro, Rua Pacheco Leão, 915, Jardim Botânico, Rio de Janeiro 22460-030, Brazil.
| | - Leonardo Tavares Salgado
- Research Institute of the Botanical Garden of Rio de Janeiro, Rua Pacheco Leão, 915, Jardim Botânico, Rio de Janeiro 22460-030, Brazil.
| | - Cristiane Carneiro Thompson
- Institute of Biology, Federal University of Rio de Janeiro (UFRJ) Av. Carlos Chagas Filho, 373-CCS-IB-BLOCO A (ANEXO) A3-202, SAGE-COPPE, Rio de Janeiro 21941-599, Brazil.
| | - Renato Crespo Pereira
- Departament of Marine Biology, Federal Fluminense University (UFF), Morro do Valonguinho, s/n, Centro, Niterói 24001-970, Brazil.
| | - Fabiano L Thompson
- Institute of Biology, Federal University of Rio de Janeiro (UFRJ) Av. Carlos Chagas Filho, 373-CCS-IB-BLOCO A (ANEXO) A3-202, SAGE-COPPE, Rio de Janeiro 21941-599, Brazil.
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Desoti VC, Lazarin-Bidóia D, Sudatti DB, Pereira RC, Ueda-Nakamura T, Nakamura CV, de Oliveira Silva S. Additional evidence of the trypanocidal action of (-)-elatol on amastigote forms through the involvement of reactive oxygen species. Mar Drugs 2014; 12:4973-83. [PMID: 25257785 PMCID: PMC4178491 DOI: 10.3390/md12094973] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [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: 01/24/2014] [Revised: 03/25/2014] [Accepted: 04/23/2014] [Indexed: 02/07/2023] Open
Abstract
Chagas’ disease, a vector-transmitted infectious disease, is caused by the protozoa parasite Trypanosoma cruzi. Drugs that are currently available for the treatment of this disease are unsatisfactory, making the search for new chemotherapeutic agents a priority. We recently described the trypanocidal action of (−)-elatol, extracted from the macroalga Laurencia dendroidea. However, nothing has been described about the mechanism of action of this compound on amastigotes that are involved in the chronic phase of Chagas’ disease. The goal of the present study was to evaluate the effect of (−)-elatol on the formation of superoxide anions (O2•−), DNA fragmentation, and autophagy in amastigotes of T. cruzi to elucidate the possible mechanism of the trypanocidal action of (−)-elatol. Treatment of the amastigotes with (−)-elatol increased the formation of O2•− at all concentrations of (−)-elatol assayed compared with untreated parasites. Increased fluorescence was observed in parasites treated with (−)-elatol, indicating DNA fragmentation and the formation of autophagic compartments. The results suggest that the trypanocidal action of (−)-elatol might involve the induction of the autophagic and apoptotic death pathways triggered by an imbalance of the parasite’s redox metabolism.
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Affiliation(s)
- Vânia Cristina Desoti
- Postgraduate Program in Pharmaceutical Sciences, State University of Maringa, Colombo Avenue 5790, Maringa, Parana CEP 87020-900, Brazil.
| | - Danielle Lazarin-Bidóia
- Postgraduate Program in Pharmaceutical Sciences, State University of Maringa, Colombo Avenue 5790, Maringa, Parana CEP 87020-900, Brazil.
| | - Daniela Bueno Sudatti
- Department of Marine Biology, Federal Fluminense University, P.O. Box 100644, Niteroi, Rio de Janeiro CEP 24001-970, Brazil.
| | - Renato Crespo Pereira
- Department of Marine Biology, Federal Fluminense University, P.O. Box 100644, Niteroi, Rio de Janeiro CEP 24001-970, Brazil.
| | - Tania Ueda-Nakamura
- Postgraduate Program in Pharmaceutical Sciences, State University of Maringa, Colombo Avenue 5790, Maringa, Parana CEP 87020-900, Brazil.
| | - Celso Vataru Nakamura
- Postgraduate Program in Pharmaceutical Sciences, State University of Maringa, Colombo Avenue 5790, Maringa, Parana CEP 87020-900, Brazil.
| | - Sueli de Oliveira Silva
- Postgraduate Program in Pharmaceutical Sciences, State University of Maringa, Colombo Avenue 5790, Maringa, Parana CEP 87020-900, Brazil.
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Pereira RC, Vasconcelos MA. Chemical defense in the red seaweed Plocamium brasiliense: spatial variability and differential action on herbivores. BRAZ J BIOL 2014; 74:545-52. [DOI: 10.1590/bjb.2014.0080] [Citation(s) in RCA: 9] [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] [Received: 06/19/2012] [Accepted: 04/22/2013] [Indexed: 11/21/2022] Open
Abstract
Species of Plocamium are known as prolific sources of halogenated secondary metabolites exhibiting few explored ecological roles. In this study the crude extracts from specimens of P. brasiliensecollected in two distinct places, Enseada do Forno and Praia Rasa, Búzios, Estado do Rio de Janeiro, were evaluated as defense against the sea urchin Lytechinus variegatus and the crab Acanthonyx scutiformis. These specimens produce a similar amount of crude extract and also halogenated monoterpene compound-types, but individuals of P. brasiliense from Praia Rasa exhibit a major compound representing about 59% of the total chemicals. Natural concentrations of the crude extracts obtained from both specimens of P. brasiliense significantly inhibited the herbivory by the sea urchin L. variegatus, but had no significant effect on the feeding by A. scutiformis, a crab commonly associated to chemically defended host. Crude extract from P. brasiliense collected at Praia Rasa was more efficient as defense against L. variegatusthan that crude extract from populations of this alga from Enseada do Forno, probably due to presence of a major secondary metabolite. These two studied population live under different environmental conditions, but they are only about 30 Km apart. However, it is impossible to affirm that environmental characteristics (abiotic or biotic) would be responsible for the difference of defensive potential found in the two populations of P. brasiliense studied here. Further genetic studies will be necessary to clarify this question and to explain why populations of a single species living in different but close locations can exhibit distinct chemicals.
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Affiliation(s)
- RC Pereira
- Universidade Federal Fluminense – UFF, Brazil
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Plouguerné E, de Souza LM, Sassaki GL, Cavalcanti JF, Villela Romanos MT, da Gama BAP, Crespo Pereira R, Barreto-Bergter E. Antiviral Sulfoquinovosyldiacylglycerols (SQDGs) from the Brazilian brown seaweed Sargassum vulgare. Mar Drugs 2013; 11:4628-40. [PMID: 24284427 PMCID: PMC3853750 DOI: 10.3390/md11114628] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [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: 09/17/2013] [Revised: 10/29/2013] [Accepted: 11/04/2013] [Indexed: 11/16/2022] Open
Abstract
Total lipids from the Brazilian brown seaweed Sargassum vulgare were extracted with chloroform/methanol 2:1 and 1:2 (v/v) at room temperature. After performing Folch partition of the crude lipid extract, the lipids recovered from the Folch lower layer were fractionated on a silica gel column eluted with chloroform, acetone and methanol. The fraction eluted with methanol, presented a strong orcinol-positive band characteristic of the presence of sulfatides when examined by TLC. This fraction was then purified by two successive silica gel column chromatography giving rise to fractions F4I86 and F4II90 that exhibited strong activity against herpes simplex virus type 1 and 2. The chemical structures present in both fractions were elucidated by ESI-MS and ¹H/¹³C NMR analysis HSQC fingerprints based on their tandem-MS behavior as Sulfoquinovosyldiacylglycerols (SQDGs). The main SQDG present in both fractions and responsible for the anti-herpes activity observed was identified as 1,2-di-O-palmitoyl-3-O-(6-sulfo-α-D-quinovopyranosyl)-glycerol.
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Affiliation(s)
- Erwan Plouguerné
- Department of Marine Biology, Biology Institute, Fluminense Federal University, Niterói 24210-130, RJ, Brazil; E-Mails: (B.A.P.G.); (R.C.P.)
| | - Lauro M. de Souza
- Department of Biochemistry and Molecular Biology, Paraná Federal University, Curitiba 81531-990, PR, Brazil; E-Mails: (L.M.S.); (G.L.S.)
| | - Guilherme L. Sassaki
- Department of Biochemistry and Molecular Biology, Paraná Federal University, Curitiba 81531-990, PR, Brazil; E-Mails: (L.M.S.); (G.L.S.)
| | - Jéssica Figueiredo Cavalcanti
- Department of Virology, Microbiology Institute, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; E-Mails: (J.F.C.); (M.T.V.R.)
| | - Maria Teresa Villela Romanos
- Department of Virology, Microbiology Institute, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; E-Mails: (J.F.C.); (M.T.V.R.)
| | - Bernardo A. P. da Gama
- Department of Marine Biology, Biology Institute, Fluminense Federal University, Niterói 24210-130, RJ, Brazil; E-Mails: (B.A.P.G.); (R.C.P.)
| | - Renato Crespo Pereira
- Department of Marine Biology, Biology Institute, Fluminense Federal University, Niterói 24210-130, RJ, Brazil; E-Mails: (B.A.P.G.); (R.C.P.)
| | - Eliana Barreto-Bergter
- Department of General Microbiology, Microbiology Institute, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil; E-Mail:
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de Oliveira LS, Gregoracci GB, Silva GGZ, Salgado LT, Filho GA, Alves-Ferreira M, Pereira RC, Thompson FL. Transcriptomic analysis of the red seaweed Laurencia dendroidea (Florideophyceae, Rhodophyta) and its microbiome. BMC Genomics 2012; 13:487. [PMID: 22985125 PMCID: PMC3534612 DOI: 10.1186/1471-2164-13-487] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [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: 03/26/2012] [Accepted: 08/31/2012] [Indexed: 11/16/2022] Open
Abstract
Background Seaweeds of the Laurencia genus have a broad geographic distribution and are largely recognized as important sources of secondary metabolites, mainly halogenated compounds exhibiting diverse potential pharmacological activities and relevant ecological role as anti-epibiosis. Host-microbe interaction is a driving force for co-evolution in the marine environment, but molecular studies of seaweed-associated microbial communities are still rare. Despite the large amount of research describing the chemical compositions of Laurencia species, the genetic knowledge regarding this genus is currently restricted to taxonomic markers and general genome features. In this work we analyze the transcriptomic profile of L. dendroidea J. Agardh, unveil the genes involved on the biosynthesis of terpenoid compounds in this seaweed and explore the interactions between this host and its associated microbiome. Results A total of 6 transcriptomes were obtained from specimens of L. dendroidea sampled in three different coastal locations of the Rio de Janeiro state. Functional annotations revealed predominantly basic cellular metabolic pathways. Bacteria was the dominant active group in the microbiome of L. dendroidea, standing out nitrogen fixing Cyanobacteria and aerobic heterotrophic Proteobacteria. The analysis of the relative contribution of each domain highlighted bacterial features related to glycolysis, lipid and polysaccharide breakdown, and also recognition of seaweed surface and establishment of biofilm. Eukaryotic transcripts, on the other hand, were associated with photosynthesis, synthesis of carbohydrate reserves, and defense mechanisms, including the biosynthesis of terpenoids through the mevalonate-independent pathway. Conclusions This work describes the first transcriptomic profile of the red seaweed L. dendroidea, increasing the knowledge about ESTs from the Florideophyceae algal class. Our data suggest an important role for L. dendroidea in the primary production of the holobiont and the role of Bacteria as consumers of organic matter and possibly also as nitrogen source. Furthermore, this seaweed expressed sequences related to terpene biosynthesis, including the complete mevalonate-independent pathway, which offers new possibilities for biotechnological applications using secondary metabolites from L. dendroidea.
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Affiliation(s)
- Louisi Souza de Oliveira
- Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal do Rio de Janeiro (UFRJ) Av, Carlos Chagas Filho, 373-CCS - IB - BLOCO A (ANEXO) A3- 202, Rio de Janeiro, 21941-599, Brazil
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Desoti VC, Lazarin-Bidóia D, Sudatti DB, Pereira RC, Alonso A, Ueda-Nakamura T, Dias Filho BP, Nakamura CV, Silva SDO. Trypanocidal action of (-)-elatol involves an oxidative stress triggered by mitochondria dysfunction. Mar Drugs 2012; 10:1631-1646. [PMID: 23015766 PMCID: PMC3447331 DOI: 10.3390/md10081631] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [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: 06/22/2012] [Revised: 07/08/2012] [Accepted: 07/27/2012] [Indexed: 11/17/2022] Open
Abstract
Natural compounds have shown good potential for the discovery of new chemotherapeutics for the treatment of Chagas' disease. Recently, our group reported the effective trypanocidal activity of (-)-elatol, extracted from the red macroalgae Laurencia dendroidea present in the Brazilian coast against Trypanosoma cruzi. However, the mechanism of action of this compound has remained unclear. There are only hypotheses concerning its action on mitochondrial function. Here, we further investigated the mechanisms of action of (-)-elatol on trypomastigotes of T. cruzi. For this, we evaluated some biochemical alterations in trypomastigotes treated with (-)-elatol. Our results show that (-)-elatol induced depolarization of the mitochondrial membrane, an increase in the formation of mitochondrial superoxide anion and loss of cell membrane and DNA integrity. Additionally, (-)-elatol induced formation of autophagic vacuoles and a decrease in cell volume. All together, these results suggest that the trypanocidal action of (-)-elatol involves multiple events and mitochondria might be the initial target organelle. Our hypothesis is that the mitochondrial dysfunction leads to an increase of ROS production through the electron transport chain, which affects cell membrane and DNA integrity leading to different types of parasite death.
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Affiliation(s)
- Vânia Cristina Desoti
- Postgraduate Program in Pharmaceutical Sciences, State University of Maringa, Colombo Avenue 5790, CEP 87020-900, Maringa, Parana, Brazil; (V.C.D.); (D.L.-B.); (T.U.-N.); (B.P.D.F.); (C.V.N.)
| | - Danielle Lazarin-Bidóia
- Postgraduate Program in Pharmaceutical Sciences, State University of Maringa, Colombo Avenue 5790, CEP 87020-900, Maringa, Parana, Brazil; (V.C.D.); (D.L.-B.); (T.U.-N.); (B.P.D.F.); (C.V.N.)
| | - Daniela Bueno Sudatti
- Department of Marine Biology, Federal Fluminense University, PO Box 100644, CEP 24001-970, Niteroi, Rio de Janeiro, Brazil; (D.B.S.); (R.C.P.)
| | - Renato Crespo Pereira
- Department of Marine Biology, Federal Fluminense University, PO Box 100644, CEP 24001-970, Niteroi, Rio de Janeiro, Brazil; (D.B.S.); (R.C.P.)
| | - Antonio Alonso
- Institute of Physics, Federal University of Goias, CEP 74001-970, Goiania, Goias, Brazil;
| | - Tania Ueda-Nakamura
- Postgraduate Program in Pharmaceutical Sciences, State University of Maringa, Colombo Avenue 5790, CEP 87020-900, Maringa, Parana, Brazil; (V.C.D.); (D.L.-B.); (T.U.-N.); (B.P.D.F.); (C.V.N.)
- Department of Basic Health Sciences, State University of Maringa, Colombo Avenue 5790, CEP 87020-900, Maringa, Parana, Brazil
| | - Benedito Prado Dias Filho
- Postgraduate Program in Pharmaceutical Sciences, State University of Maringa, Colombo Avenue 5790, CEP 87020-900, Maringa, Parana, Brazil; (V.C.D.); (D.L.-B.); (T.U.-N.); (B.P.D.F.); (C.V.N.)
- Department of Basic Health Sciences, State University of Maringa, Colombo Avenue 5790, CEP 87020-900, Maringa, Parana, Brazil
| | - Celso Vataru Nakamura
- Postgraduate Program in Pharmaceutical Sciences, State University of Maringa, Colombo Avenue 5790, CEP 87020-900, Maringa, Parana, Brazil; (V.C.D.); (D.L.-B.); (T.U.-N.); (B.P.D.F.); (C.V.N.)
- Department of Basic Health Sciences, State University of Maringa, Colombo Avenue 5790, CEP 87020-900, Maringa, Parana, Brazil
| | - Sueli de Oliveira Silva
- Postgraduate Program in Pharmaceutical Sciences, State University of Maringa, Colombo Avenue 5790, CEP 87020-900, Maringa, Parana, Brazil; (V.C.D.); (D.L.-B.); (T.U.-N.); (B.P.D.F.); (C.V.N.)
- Department of Basic Health Sciences, State University of Maringa, Colombo Avenue 5790, CEP 87020-900, Maringa, Parana, Brazil
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dos Santos AO, Britta EA, Bianco EM, Ueda-Nakamura T, Filho BPD, Pereira RC, Nakamura CV. 4-Acetoxydolastane diterpene from the Brazilian brown alga Canistrocarpus cervicornis as antileishmanial agent. Mar Drugs 2011; 9:2369-2383. [PMID: 22163190 PMCID: PMC3229239 DOI: 10.3390/md9112369] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [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: 09/14/2011] [Revised: 10/01/2011] [Accepted: 10/18/2011] [Indexed: 11/18/2022] Open
Abstract
Natural marine products have shown an interesting array of diverse and novel chemical structures with potent biological activities. Our study reports the antiproliferative assays of crude extracts, fraction and pure compound (4R,9S,14S)-4α-acetoxy-9β,14α-dihydroxydolast-1(15),7-diene (1) obtained from brown alga Canistrocarpus cervicornis showing the antileishmanial activity. We showed that 1 had a dose-dependent activity during 72 h of treatment, exhibiting IC(50) of 2.0 μg/mL, 12.0 μg/mL, and 4.0 μg/mL for promastigote, axenic amastigote and intracellular amastigote forms of Leishmania amazonensis, respectively. A cytotoxicity assay showed that the action of the isolated compound 1 was 93.0 times less toxic to the macrophage than to the protozoan. Additionally, compound 1 induced ultrastructural changes, including extensive mitochondrial damage; decrease in Rh123 fluorescence, suggesting interference with the mitochondrial membrane potential; and lipid peroxidation in parasite cells. The use of 1 from C. cervicornis against L. amazonensis parasites might be of great interest as a future alternative to the development of new antileishmanial drugs.
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Affiliation(s)
- Adriana Oliveira dos Santos
- Postgraduate Program in Microbiology, State University of Londrina, Highway Celso Garcia Cid, PR 445, Km 380, CEP 86051-990, Londrina, Parana, Brazil; E-Mails: (A.O.d.S.); (B.P.D.F.)
| | - Elizandra Aparecida Britta
- Postgraduate Program in Pharmaceutical Sciences, Laboratory of Technological Innovation in the Development of Drugs and Cosmetics, State University of Maringa, Colombo Avenue 5790, CEP 87020-900, Maringa, Parana, Brazil; E-Mails: (E.A.B); (T.U.-N.)
| | - Everson Miguel Bianco
- Postgraduate Program in Chemistry, Department of Fundamental Chemistry, Federal University of Pernambuco, CEP 50670-901, Recife, Pernambuco, Brazil; E-Mail:
| | - Tania Ueda-Nakamura
- Postgraduate Program in Pharmaceutical Sciences, Laboratory of Technological Innovation in the Development of Drugs and Cosmetics, State University of Maringa, Colombo Avenue 5790, CEP 87020-900, Maringa, Parana, Brazil; E-Mails: (E.A.B); (T.U.-N.)
| | - Benedito Prado Dias Filho
- Postgraduate Program in Microbiology, State University of Londrina, Highway Celso Garcia Cid, PR 445, Km 380, CEP 86051-990, Londrina, Parana, Brazil; E-Mails: (A.O.d.S.); (B.P.D.F.)
- Postgraduate Program in Pharmaceutical Sciences, Laboratory of Technological Innovation in the Development of Drugs and Cosmetics, State University of Maringa, Colombo Avenue 5790, CEP 87020-900, Maringa, Parana, Brazil; E-Mails: (E.A.B); (T.U.-N.)
| | - Renato Crespo Pereira
- Department of Marine Biology, Federal Fluminense University, PO Box 100644, CEP 24001-970, Niteroi, Rio de Janeiro, Brazil; E-Mail:
| | - Celso Vataru Nakamura
- Postgraduate Program in Microbiology, State University of Londrina, Highway Celso Garcia Cid, PR 445, Km 380, CEP 86051-990, Londrina, Parana, Brazil; E-Mails: (A.O.d.S.); (B.P.D.F.)
- Postgraduate Program in Pharmaceutical Sciences, Laboratory of Technological Innovation in the Development of Drugs and Cosmetics, State University of Maringa, Colombo Avenue 5790, CEP 87020-900, Maringa, Parana, Brazil; E-Mails: (E.A.B); (T.U.-N.)
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de Andrade Moura L, Bianco EM, Pereira RC, Teixeira VL, Fuly AL. Anticoagulation and antiplatelet effects of a dolastane diterpene isolated from the marine brown alga Canistrocarpus cervicornis. J Thromb Thrombolysis 2011; 31:235-40. [PMID: 21210185 DOI: 10.1007/s11239-010-0545-6] [Citation(s) in RCA: 20] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Marine brown algae of the family Dictyotaceae are rich sources of monocyclic, bicyclic, and tricyclic diterpenes. These molecules are responsible for a wide range of pharmacological and ecological functions, as antitumor and antiviral. Here, we analyzed the effect of the dolastane diterpene (4R, 9S, 14S)-4α-Acetoxy-9β,14α-dihydroxydolast-1(15),7-diene, isolated from the marine brown alga, Canistrocarpus cervicornis on blood clotting and platelet aggregation. The dolastane diterpene was able to inhibit either plasma or fibrinogen coagulation induced by thrombin as well as delayed coagulation in the recalcification test. The dolastane diterpene impaired, in a concentration-dependent manner platelet aggregation induced by collagen or adenosine diphosphate with no lysis on such cells. Thus, the dolastane diterpene maybe a promising source of natural inhibitors for hemostatic disturbs (clotting and platelet aggregation) leading to the discovery of drugs of potential use as antithrombotic and antiplatelet. In addition, the dolastane diterpene may be used as a molecular model for development of new antithrombotic agents giving new approaches to the management to the treatment of thrombotic disturbs.
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Affiliation(s)
- Laura de Andrade Moura
- Departamento de Biologia Molecular e Celular, Instituto de Biologia, Universidade Federal Fluminense, Niterói 24001970, Brazil
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Moura LDA, Sanchez EF, Bianco ÉM, Pereira RC, Teixeira VL, Fuly AL. Antiophidian properties of a dolastane diterpene isolated from the marine brown alga Canistrocarpus cervicornis. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.bionut.2010.09.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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dos Santos AO, Veiga-Santos P, Ueda-Nakamura T, Filho BPD, Sudatti DB, Bianco ÉM, Pereira RC, Nakamura CV. Effect of elatol, isolated from red seaweed Laurencia dendroidea, on Leishmania amazonensis. Mar Drugs 2010; 8:2733-43. [PMID: 21139841 PMCID: PMC2996173 DOI: 10.3390/md8112733] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2010] [Revised: 10/14/2010] [Accepted: 10/22/2010] [Indexed: 11/17/2022] Open
Abstract
In the present study, we investigated the antileishmanial activity of sesquiterpene elatol, the major constituent of the Brazilian red seaweed Laurencia dendroidea (Hudson) J.V. Lamouroux, against L. amazonensis. Elatol after 72 h of treatment, showed an IC(50) of 4.0 μM and 0.45 μM for promastigote and intracellular amastigote forms of L. amazonensis, respectively. By scanning and transmission electron microscopy, parasites treated with elatol revealed notable changes compared with control cells, including: pronounced swelling of the mitochondrion; appearance of concentric membrane structures inside the organelle; destabilization of the plasma membrane; and formation of membrane structures, apparently an extension of the endoplasmic reticulum, which is suggestive of an autophagic process. A cytotoxicity assay showed that the action of the isolated compound is more specific for protozoa, and it is not toxic to macrophages. Our studies indicated that elatol is a potent antiproliferative agent against promastigote and intracellular amastigote forms, and may have important advantages for the development of new anti-leishamanial chemotherapies.
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Affiliation(s)
- Adriana Oliveira dos Santos
- Programa de Pós-graduação em Microbiologia, Universidade Estadual de Londrina, Rodovia Celso Garcia Cid, PR 445, Km 380, CEP 86051-990, Campus Universitário, Londrina, Paraná, Brazil; E-Mails: (A.O.S.); (B.P.D.F.)
| | - Phercyles Veiga-Santos
- Programa de Pós-graduação em Ciências Farmacêuticas, Laboratório de Inovação Tecnológica no Desenvolvimento de Fármacos e Cosméticos, Bloco B-08, Universidade Estadual de Maringá, Av. Colombo 5790, CEP 87020-900, Maringá, Paraná, Brazil; E-Mails: (P.V.-S.); (T.U.-N.)
| | - Tânia Ueda-Nakamura
- Programa de Pós-graduação em Ciências Farmacêuticas, Laboratório de Inovação Tecnológica no Desenvolvimento de Fármacos e Cosméticos, Bloco B-08, Universidade Estadual de Maringá, Av. Colombo 5790, CEP 87020-900, Maringá, Paraná, Brazil; E-Mails: (P.V.-S.); (T.U.-N.)
| | - Benedito Prado Dias Filho
- Programa de Pós-graduação em Microbiologia, Universidade Estadual de Londrina, Rodovia Celso Garcia Cid, PR 445, Km 380, CEP 86051-990, Campus Universitário, Londrina, Paraná, Brazil; E-Mails: (A.O.S.); (B.P.D.F.)
- Programa de Pós-graduação em Ciências Farmacêuticas, Laboratório de Inovação Tecnológica no Desenvolvimento de Fármacos e Cosméticos, Bloco B-08, Universidade Estadual de Maringá, Av. Colombo 5790, CEP 87020-900, Maringá, Paraná, Brazil; E-Mails: (P.V.-S.); (T.U.-N.)
| | - Daniela Bueno Sudatti
- Departamento de Biologia Marinha, Universidade Federal Fluminense, Caixa Postal 100644, CEP 24001-970, Niterói, Rio de Janeiro, Brazil; E-Mails: (D.B.S.); (R.C.P.)
| | - Éverson Miguel Bianco
- Programa de Pós-graduação em Química Orgânica, Universidade Federal Fluminense, Outeiro de São João Baptista, s/n, CEP 24.020-150, Niterói, Rio de Janeiro, Brazil; E-Mail: (É.M.B.)
| | - Renato Crespo Pereira
- Departamento de Biologia Marinha, Universidade Federal Fluminense, Caixa Postal 100644, CEP 24001-970, Niterói, Rio de Janeiro, Brazil; E-Mails: (D.B.S.); (R.C.P.)
- Programa de Pós-graduação em Química Orgânica, Universidade Federal Fluminense, Outeiro de São João Baptista, s/n, CEP 24.020-150, Niterói, Rio de Janeiro, Brazil; E-Mail: (É.M.B.)
| | - Celso Vataru Nakamura
- Programa de Pós-graduação em Microbiologia, Universidade Estadual de Londrina, Rodovia Celso Garcia Cid, PR 445, Km 380, CEP 86051-990, Campus Universitário, Londrina, Paraná, Brazil; E-Mails: (A.O.S.); (B.P.D.F.)
- Programa de Pós-graduação em Ciências Farmacêuticas, Laboratório de Inovação Tecnológica no Desenvolvimento de Fármacos e Cosméticos, Bloco B-08, Universidade Estadual de Maringá, Av. Colombo 5790, CEP 87020-900, Maringá, Paraná, Brazil; E-Mails: (P.V.-S.); (T.U.-N.)
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Moura LDA, Sanchez EF, Bianco EM, Pereira RC, Teixeira VL, Fuly AL. WITHDRAWN: Antiophidian properties of a dolastane diterpene isolated from the marine brown alga Canistrocarpus cervicornis. Biomed Pharmacother 2010:S0753-3322(10)00181-2. [PMID: 21131161 DOI: 10.1016/j.biopha.2010.09.023] [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] [Received: 06/28/2010] [Accepted: 09/30/2010] [Indexed: 11/25/2022] Open
Abstract
The Publisher regrets that this article is an accidental duplication of an article that has already been published, http://dx.doi.org/10.1016/j.bionut.2011.06.021. The duplicate article has therefore been withdrawn.
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Affiliation(s)
- Laura De Andrade Moura
- Departamento de Biologia Molecular e Celular, Instituto de Biologia, Universidade Federal Fluminense, Campus Valonguinho, Niterói, Rio de Janeiro, RJ, Brazil
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Nocente M, Tardocchi M, Chugunov I, Pereira RC, Edlington T, Fernandes AM, Gin D, Grosso G, Kiptily V, Murari A, Neto A, Perelli Cippo E, Pietropaolo A, Proverbio I, Shevelev A, Sousa J, Syme B, Gorini G. Energy resolution of gamma-ray spectroscopy of JET plasmas with a LaBr3 scintillator detector and digital data acquisition. Rev Sci Instrum 2010; 81:10D321. [PMID: 21058454 DOI: 10.1063/1.3501386] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A new high efficiency, high resolution, fast γ-ray spectrometer was recently installed at the JET tokamak. The spectrometer is based on a LaBr3(Ce) scintillator coupled to a photomultiplier tube. A digital data acquisition system is used to allow spectrometry with event rates in excess of 1 MHz expected in future JET DT plasmas. However, at the lower rates typical of present day experiments, digitization can degrade the energy resolution of the system, depending on the algorithms used for extracting pulse height information from the digitized pulses. In this paper, the digital and analog spectrometry methods were compared for different experimental conditions. An algorithm based on pulse shape fitting was developed, providing energy resolution equivalent to the traditional analog spectrometry method.
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Affiliation(s)
- M Nocente
- Dipartimento di Fisica, Università degli Studi di Milano-Bicocca and Istituto di Fisica del Plasma, Associazione EURATOM-ENEA-CNR, 20125 Milano, Italy.
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Komlev VS, Mastrogiacomo M, Pereira RC, Peyrin F, Rustichelli F, Cancedda R, Cancedda R. Biodegradation of porous calcium phosphate scaffolds in an ectopic bone formation model studied by X-ray computed microtomograph. Eur Cell Mater 2010; 19:136-46. [PMID: 20349404 DOI: 10.22203/ecm.v019a14] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Three types of ceramic scaffolds with different composition and structure [namely synthetic 100% hydroxyapatite (HA; Engipore), synthetic calcium phosphate multiphase biomaterial containing 67% silicon stabilized tricalcium phosphate (Si-TCP; Skelite) and natural bone mineral derived scaffolds (Bio-oss)] were seeded with mesenchymal stem cells (MSC) and ectopically implanted for 8 and 16 weeks in immunodeficient mice. X-ray synchrotron radiation microtomography was used to derive 3D structural information on the same scaffolds both before and after implantation. Meaningful images and morphometric parameters such as scaffold and bone volume fraction, mean thickness and thickness distribution of the different phases as a function of the implantation time, were obtained. The used imaging algorithms allowed a direct comparison and registration of the 3D structure before and after implantation of the same sub-volume of a given scaffold. In this way it was possible to directly monitor the tissue engineered bone growth and the complete or partial degradation of the scaffold. Further, the detailed kinetics studies on Skelite scaffolds implanted for different length of times from 3 days to 24 weeks, revealed in the X-ray absorption histograms two separate peaks associated to HA and TCP. It was therefore possible to observe that the progressive degradation of the Skelite scaffolds was mainly due to the resorption of TCP. The different saturation times in the tissue engineered bone growth and in the TCP resorption confirmed that the bone growth was not limited the scaffold regions that were resorbed but continued in the inward direction with respect to the pore surface.
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Affiliation(s)
- V S Komlev
- Istituto Nazionale per la Ricerca sul Cancro and Dipartimento di Oncologia, Biologia e Genetica dell'Universita' di Genova, Genova, Italy
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Vasconcelos MA, Ferreira WJ, Pereira RC, Cavalcanti DN, Teixeira VL. Chemical constituents from the red alga Plocamium brasiliense (Greville) M. Howe and W.R. Taylor. BIOCHEM SYST ECOL 2010. [DOI: 10.1016/j.bse.2009.12.031] [Citation(s) in RCA: 14] [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: 11/29/2022]
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Domingos TFS, Carvalho C, de Andrade Moura L, Teixeira VL, Pereira RC, Bianco ΈM, Ferreira WJ, Ramos CJB, de Miranda ALP, Melo PA, Guimarães JA, Fuly AL. Antilonomic Effects of Brazilian Brown Seaweed Extracts. Nat Prod Commun 2009. [DOI: 10.1177/1934578x0900400811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The aim of this work was to investigate the hemolysis and blood clotting activity of Lomonia obliqua venom and the ability of some Brazilian marine algal extracts ( Canistrocarpus cervicornis, Stypopodium zonale and Dictyota pfaffi) to antagonize such biological activities. L. obliqua caterpillars are dangerous to human beings and envenomation symptoms are characterized by hemorrhagic, hemolytic and blood clotting disorders, and acute renal failure, which sometimes lead to the death of the victims. Through in vitro experiments we have shown that L. obliqua venom is able to clot human plasma and hemolize human erythrocytes and that the coagulation activity of the venom is inhibited by the extracts of C. cervicornis, S. zonale and D. pfaffi. In contrast, C. cervicornis and S. zonale extracts did not inhibit the hemolytic activity of L. oblqua, as did the extract of D. pfaffi. These finding indicate that marine algae may be used as antivenoms or may contribute to the development of compounds with antilonomic effects.
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Affiliation(s)
- Thaisa Francielle Souza Domingos
- Departamento de Biologia Molecular e Celular, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil, 24001-970
| | - Carla Carvalho
- Departamento de Biologia Molecular e Celular, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil, 24001-970
| | - Laura de Andrade Moura
- Departamento de Biologia Molecular e Celular, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil, 24001-970
| | - Valéria Laneuville Teixeira
- Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil, 24001-970
| | - Renato Crespo Pereira
- Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil, 24001-970
| | - Έverson Miguel Bianco
- Programa de Pós-graduação em Química Orgânica, Instituto de Química, Universidade Federal Fluminense, Niterói, RJ, Brazil, 24020-9015
| | - Wilton José Ferreira
- Programa de Pós-graduação em Química Orgânica, Instituto de Química, Universidade Federal Fluminense, Niterói, RJ, Brazil, 24020-9015
| | - Carlos José Brito Ramos
- Departamento de Biologia Marinha, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil, 24001-970
| | | | - Paulo Assis Melo
- Departamento de Farmacologia Básica e Clínica, Universidade Federal do Rio de Janeiro, RJ, Brazil, 21941-590
| | - Jorge Almeida Guimarães
- Centro de Biotecnologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil, 91501-970
| | - André Lopes Fuly
- Departamento de Biologia Molecular e Celular, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil, 24001-970
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Domingos TFS, Carvalho C, Moura LDA, Teixeira VL, Pereira RC, Bianco EM, Ferreira WJ, Ramos CJB, de Miranda ALP, Melo PA, Guimarães JA, Fuly AL. Antilonomic effects of Brazilian brown seaweed extracts. Nat Prod Commun 2009; 4:1075-8. [PMID: 19768986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
Abstract
The aim of this work was to investigate the hemolysis and blood clotting activity of Lomonia obliqua venom and the ability of some Brazilian marine algal extracts (Canistrocarpus cervicornis, Stypopodium zonale and Dictyota pfaffi) to antagonize such biological activities. L. obliqua caterpillars are dangerous to human beings and envenomation symptoms are characterized by hemorrhagic, hemolytic and blood clotting disorders, and acute renal failure, which sometimes lead to the death of the victims. Through in vitro experiments we have shown that L. obliqua venom is able to clot human plasma and hemolize human erythrocytes and that the coagulation activity of the venom is inhibited by the extracts of C. cervicornis, S. zonale and D. pfaffi. In contrast, C. cervicornis and S. zonale extracts did not inhibit the hemolytic activity of L. oblqua, as did the extract of D. pfaffi. These finding indicate that marine algae may be used as antivenoms or may contribute to the development of compounds with antilonomic effects.
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44
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Garcia DG, Bianco EM, Santos MDCBD, Pereira RC, Faria MVDC, Teixeira VL, Burth P. Inhibition of mammal Na(+)K(+)-ATPase by diterpenes extracted from the Brazilian brown alga Dictyota cervicornis. Phytother Res 2009; 23:943-7. [PMID: 19142983 DOI: 10.1002/ptr.2600] [Citation(s) in RCA: 15] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
The dolastane diterpenes 4-acetoxy-9,14-dihydroxydolast-1(15),7-diene (1) and 4,7-diacetoxy-14-hydroxydolast-1(15),8-diene (2) were isolated from specimens of the alga Dictyota cervicornis collected from the Rio de Janeiro coast, Brazil. Chemical structures of the diterpenes were assigned by 1D and 2D NMR spectral data for the first time. Both substances inhibited Na(+)K(+)-ATPase preparations from guinea-pig brain or kidney, with the same inhibitory potency towards enzyme isoforms. The maximal inhibition obtained for 1 was 40% at a concentration of 0.5 mm in the incubation mixture, while it reached 80% for compound 2 at this concentration. Ouabain insensitive ATPases were inhibited by 1, but not by 2. Data comparing the inhibitory potency of these compounds with that of ouabain and oleic acid suggest a higher degree of selectivity of 2 towards the Na(+)K(+)-pump. Cardiac glycosides such as ouabain are used classically in the treatment of heart failure, but alterations of Na(+)K(+)-pump activity are also involved in several other diseases. Therefore, the study of compounds interfering with this pump activity is gaining further importance.
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Affiliation(s)
- Diogo Gomes Garcia
- Departamento de Biologia Celular e Molecular, Instituto de Biologia, Universidade Federal Fluminense, Niterói, RJ, Brazil
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Pereira RC, Scaranari M, Castagnola P, Grandizio M, Azevedo HS, Reis RL, Cancedda R, Gentili C. Novel injectable gel (system) as a vehicle for human articular chondrocytes in cartilage tissue regeneration. J Tissue Eng Regen Med 2009; 3:97-106. [PMID: 19172577 DOI: 10.1002/term.145] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
We developed a novel injectable carrageenan/fibrin/hyaluronic acid-based hydrogel with in situ gelling properties to be seeded with chondrogenic cells and used for cartilage tissue engineering applications. We first analysed the distribution within the hydrogel construct and the phenotype of human articular chondrocytes (HACs) cultured for 3 weeks in vitro. We observed a statistically significant increase in the cell number during the first 2 weeks and maintenance of cell viability throughout the cell culture, together with the deposition/formation of a cartilage-specific extracellular matrix (ECM). Taking advantage of a new in vivo model that allows the integration between newly formed and preexisting cartilage in immunodeficient mice to be investigated, we showed that injectable hydrogel seeded with human articular chondrocytes was able to regenerate and repair an experimentally made lesion in bovine articular cartilage, thus demonstrating the potential of this novel cell delivery system for cartilage tissue engineering.
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Affiliation(s)
- R C Pereira
- Dipartimento di Biologia, Oncologia e Genetica, University of Genova, Italy
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46
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Bianco EM, Teixeira VL, Pereira RC, de Souza AMT, Nucci P, Afonso IF, Rodrigues CR, Castro HC. Brown seaweed defensive chemicals: a structure-activity relationship approach for the marine environment. Nat Prod Commun 2009; 4:173-8. [PMID: 19370918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
The literature describes several diterpenes from brown seaweeds that act as defensive chemicals against natural enemies, such as competitors, epiphytes, pathogenic bacteria and herbivores. A structure-activity relationship is here presented using a new molecular modeling approach to identify structural and chemical features important to the defensive profile of four structurally related diterpenes (three dolastanes and one seco-dolastane) from Canistrocarpus cervicornis against the feeding process of the omnivorous sea urchin Lytechinus variegatus. Our experimental data revealed the herbivory inhibitory profile (HIE) for three of these evaluated compounds with (4R,7R, 14S)-4alpha,7alpha-diacetoxy-14-hydroxydolast-1(15),8-diene presenting the highest effect (HIE = 70%). Interestingly, the molecular modeling results infer that this biological activity seems to be related to several different structural features, including HOMO distribution, the molecular structure conformation, and the fulfillment of minimum requirements regarding molecular weight. These results reinforce the hypothesis about the intricate biological mechanism of these molecules due to the complexity of their chemical structures. Our work may help in the understanding of these defensive mechanisms and point to a new perspective of ecological and/or evolutionary evaluation in this area.
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Affiliation(s)
- Everson Miguel Bianco
- Organic Chemistry Post Graduate Course-Chemistry Institute, Federal Fluminense University, Outeiro de São João Baptista, s/n, Niterói-RJ, CEP 24020-150, Brazil
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Bianco ÉM, Teixeira VL, Pereira RC, de Souza AMT, Nucci P, Afonso IF, Rodrigues CR, Castro HC. Brown Seaweed Defensive Chemicals: A Structure-activity Relationship Approach for the Marine Environment. Nat Prod Commun 2009. [DOI: 10.1177/1934578x0900400202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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
The literature describes several diterpenes from brown seaweeds that act as defensive chemicals against natural enemies, such as competitors, epiphytes, pathogenic bacteria and herbivores. A structure-activity relationship is here presented using a new molecular modeling approach to identify structural and chemical features important to the defensive profile of four structurally related diterpenes (three dolastanes and one seco-dolastane) from Canistrocarpus cervicornis against the feeding process of the omnivorous sea urchin Lytechinus variegatus. Our experimental data revealed the herbivory inhibitory profile (HIE) for three of these evaluated compounds with (4R, 7R, 14S)-4α, 7α-diacetoxy-14-hydroxydolast-1(15),8-diene presenting the highest effect (HIE = 70%). Interestingly, the molecular modeling results infer that this biological activity seems to be related to several different structural features, including HOMO distribution, the molecular structure conformation, and the fulfillment of minimum requirements regarding molecular weight. These results reinforce the hypothesis about the intricate biological mechanism of these molecules due to the complexity of their chemical structures. Our work may help in the understanding of these defensive mechanisms and point to a new perspective of ecological and/or evolutionary evaluation in this area.
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Affiliation(s)
- Éverson Miguel Bianco
- Organic Chemistry Post Graduate Course - Chemistry Institute, Federal Fluminense University, Outeiro de São João Baptista, s/n, Niterói-RJ, CEP 24020-150, Brazil
| | - Valéria Laneuville Teixeira
- Department of Marine Biology, Federal Fluminense University, Outeiro de São João Baptista, s/n, P.O. Box 100.644, Niterói, RJ, CEP 24001-970, Brazil
| | - Renato Crespo Pereira
- Department of Marine Biology, Federal Fluminense University, Outeiro de São João Baptista, s/n, P.O. Box 100.644, Niterói, RJ, CEP 24001-970, Brazil
| | - Alessandra Mendonça Teles de Souza
- Organic Chemistry Post Graduate Course - Chemistry Institute, Federal Fluminense University, Outeiro de São João Baptista, s/n, Niterói-RJ, CEP 24020-150, Brazil
- LABioMol, Department Cell and Molecular Biology - Biology Institute, Federal Fluminense University, Outeiro de São João Baptista, s/n, P.O. Box 100.644, Niterói-RJ, CEP 24001-970, Brazil
- ModMolQSAR, Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro-RJ, CEP 21941590, Brazil
| | - Pedro Nucci
- LABioMol, Department Cell and Molecular Biology - Biology Institute, Federal Fluminense University, Outeiro de São João Baptista, s/n, P.O. Box 100.644, Niterói-RJ, CEP 24001-970, Brazil
| | - Ilidio Ferreira Afonso
- ModMolQSAR, Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro-RJ, CEP 21941590, Brazil
| | - Carlos Rangel Rodrigues
- ModMolQSAR, Faculty of Pharmacy, Federal University of Rio de Janeiro, Rio de Janeiro-RJ, CEP 21941590, Brazil
| | - Helena Carla Castro
- LABioMol, Department Cell and Molecular Biology - Biology Institute, Federal Fluminense University, Outeiro de São João Baptista, s/n, P.O. Box 100.644, Niterói-RJ, CEP 24001-970, Brazil
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Pereira RC, Said S. Alterations in growth and branching of Neurospora crassa caused by sub-inhibitory concentrations of antifungal agents. Rev Argent Microbiol 2009; 41:39-44. [PMID: 19391525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
Six antifungal agents at subinhibitory concentrations were used for investigating their ability to affect the growth and branching in Neurospora crassa. Among the antifungals herein used, the azole agent ketoconazole at 0.5 microg/ml inhibited radial growth more than fluconazole at 5.0 microg/ml while amphotericin B at 0.05 microg/ml was more effective than nystatin at 0.05 microg/ml. Morphological alterations in hyphae were observed in the presence of griseofulvin, ketoconazole and terbinafine at the established concentrations. The antifungal agents were more effective on vegetative growth than on conidial germination. Terbinafine markedly reduced growth unit length (GU) by 54.89%, and caused mycelia to become hyperbranched. In all cases, there was a high correlation between hyphal length and number of tips (r > 0.9). All our results showed highly significant differences by ANOVA, (p < 0.001, alpha = 0.05). Considering that the hyphal tip is the main interface between the fungus and its environment/through which enzymes and toxins are secreted and nutrients absorbed, it would not be desirable to obtain a hyperbranched mycelia with inefficient doses of antifungal drugs.
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Affiliation(s)
- R C Pereira
- Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, 14040-903, São Paulo, Brazil
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49
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Tardocchi M, Proverbio LI, Gorini G, Grosso G, Locatelli M, Chugonov IN, Gin DB, Shevelev AE, Murari A, Kiptily VG, Syme B, Fernandes AM, Pereira RC, Sousa J. Gamma ray spectroscopy at high energy and high time resolution at JET. Rev Sci Instrum 2008; 79:10E524. [PMID: 19068513 DOI: 10.1063/1.2964205] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In fusion plasmas gamma ray emission is caused by reactions of fast particles, such as fusion alpha particles, with impurities. Gamma ray spectroscopy at JET has provided valuable diagnostic information on fast fuel as well as fusion product ions. Improvements of these measurements are needed to fully exploit the flux increase provided by future high power experiments at JET and ITER. Limiting aspects are, for instance, the count rate capability due to a high neutron/gamma background combined with slow detector response and a modest energy resolution due to the low light yield of the scintillators. This paper describes the solutions developed for achieving higher energy resolution, signal to background, and time resolution. The detector design is described based on the new BrLa3 scintillator crystal. The paper will focus on hardware development, including a photomultiplier tube capable of stable operation at counting rate as high as 1 MHz, the magnetic shielding, and the fast digital data acquisition system.
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Affiliation(s)
- M Tardocchi
- Università degli Studi di Milano-Bicoccae Istituto di Fisica del Plasma, EURATOM-ENEA-CNR Association, I-20125 Milan, Italy.
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