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Fuentes-Monteverde JCC, Nath N, Forero AM, Balboa EM, Navarro-Vázquez A, Griesinger C, Jiménez C, Rodríguez J. Connection of Isolated Stereoclusters by Combining 13C-RCSA, RDC, and J-Based Configurational Analyses and Structural Revision of a Tetraprenyltoluquinol Chromane Meroterpenoid from Sargassum muticum. Mar Drugs 2022; 20:462. [PMID: 35877755 PMCID: PMC9319238 DOI: 10.3390/md20070462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 07/06/2022] [Accepted: 07/15/2022] [Indexed: 12/10/2022] Open
Abstract
The seaweed Sargassum muticum, collected on the southern coast of Galicia, yielded a tetraprenyltoluquinol chromane meroditerpene compound known as 1b, whose structure is revised. The relative configuration of 1b was determined by J-based configurational methodology combined with an iJ/DP4 statistical analysis and further confirmed by measuring two anisotropic properties: carbon residual chemical shift anisotropies (13C-RCSAs) and one-bond 1H-13C residual dipolar couplings (1DCH-RDCs). The absolute configuration of 1b was deduced by ECD/OR/TD-DFT methods and established as 3R,7S,11R.
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Affiliation(s)
- Juan Carlos C. Fuentes-Monteverde
- Departamento de Química e Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain; (J.C.C.F.-M.); (A.M.F.)
- NMR Based Structural Biology, MPI for Multidisciplinary Sciences, Am Fassberg 11, 37077 Göttingen, Germany
| | - Nilamoni Nath
- Department of Chemistry, Gauhati University, Gopinath Bardoloi Nagar, Guwahati 781014, India;
| | - Abel M. Forero
- Departamento de Química e Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain; (J.C.C.F.-M.); (A.M.F.)
| | - Elena M. Balboa
- Department of Chemical Engineering, Faculty of Science, Campus Ourense, University of Vigo, As Lagoas s/n, 32004 Ourense, Spain;
| | - Armando Navarro-Vázquez
- Departamento de Química Fundamental, CCEN, Universidade Federal de Pernambuco, Cidade Universitária, Recife 50740-550, Brazil;
| | - Christian Griesinger
- NMR Based Structural Biology, MPI for Multidisciplinary Sciences, Am Fassberg 11, 37077 Göttingen, Germany
| | - Carlos Jiménez
- Departamento de Química e Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain; (J.C.C.F.-M.); (A.M.F.)
| | - Jaime Rodríguez
- Departamento de Química e Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain; (J.C.C.F.-M.); (A.M.F.)
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Balboa EM, Li YX, Ahn BN, Eom SH, Domínguez H, Jiménez C, Rodríguez J. Photodamage attenuation effect by a tetraprenyltoluquinol chromane meroterpenoid isolated from Sargassum muticum. J Photochem Photobiol B 2015; 148:51-58. [PMID: 25874662 DOI: 10.1016/j.jphotobiol.2015.03.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Revised: 03/26/2015] [Accepted: 03/27/2015] [Indexed: 10/23/2022]
Abstract
A tetraprenyltoluquinol meroterpenoid with a chromane moiety, obtained as an epimeric mixture at C3, was isolated for the first time from the dichloromethane fraction of a methanolic extract from the brown alga Sargassum muticum. The structure has been established by means of spectral methods including NMR spectroscopy and MS and comparison with reported data. The compound showed photodamage attenuation on irradiated cells with UVA light, presented protection against intracellular ROS generation in a degree comparable to retinoic acid (9.1-20.6%) and did not display toxicity against human dermal fibroblast cells.
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Affiliation(s)
- E M Balboa
- Department of Chemical Engineering, Faculty of Science, Campus Ourense, University of Vigo, Spain; CITI-University of Vigo, Parque Tecnolóxico de Galicia, Ourense, Spain.
| | - Y-X Li
- Department of Chemistry, Pukyong National University, Busan 608-737, Republic of Korea; Marine Bioprocess Research Center, Pukyong National University, Busan 608-737, Republic of Korea.
| | - B-N Ahn
- Department of Chemistry, Pukyong National University, Busan 608-737, Republic of Korea; Marine Bioprocess Research Center, Pukyong National University, Busan 608-737, Republic of Korea.
| | - S-H Eom
- Department of Chemistry, Pukyong National University, Busan 608-737, Republic of Korea; Marine Bioprocess Research Center, Pukyong National University, Busan 608-737, Republic of Korea.
| | - H Domínguez
- Department of Chemical Engineering, Faculty of Science, Campus Ourense, University of Vigo, Spain; CITI-University of Vigo, Parque Tecnolóxico de Galicia, Ourense, Spain.
| | - C Jiménez
- Centro de Investigacións Científicas Avanzadas (CICA), Departamento Química Fundamental, Facultade de Ciencias, Universidade da Coruña, A Coruña E-15071, Spain.
| | - J Rodríguez
- Centro de Investigacións Científicas Avanzadas (CICA), Departamento Química Fundamental, Facultade de Ciencias, Universidade da Coruña, A Coruña E-15071, Spain.
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Balboa EM, Moure A, Domínguez H. Valorization of Sargassum muticum Biomass According to the Biorefinery Concept. Mar Drugs 2015; 13:3745-60. [PMID: 26110896 PMCID: PMC4483654 DOI: 10.3390/md13063745] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 05/26/2015] [Accepted: 05/28/2015] [Indexed: 11/16/2022] Open
Abstract
The biorefinery concept integrates processes and technologies for an efficient biomass conversion using all components of a feedstock. Sargassum muticum is an invasive brown algae which could be regarded as a renewable resource susceptible of individual valorization of the constituent fractions into high added-value compounds. Microwave drying technology can be proposed before conventional ethanol extraction of algal biomass, and supercritical fluid extraction with CO2 was useful to extract fucoxanthin and for the fractionation of crude ethanol extracts. Hydrothermal processing is proposed to fractionate the algal biomass and to solubilize the fucoidan and phlorotannin fractions. Membrane technology was proposed to concentrate these fractions and obtain salt- and arsenic-free saccharidic fractions. Based on these technologies, this study presents a multipurpose process to obtain six different products with potential applications for nutraceutical, cosmetic and pharmaceutical industries.
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Affiliation(s)
- Elena M Balboa
- Department of Chemical Engineering, University of Vigo (Campus Ourense), Polytechnical Building, As Lagoas s/n, Ourense 32004, Spain.
- Research Transfer and Innovation Centre (CITI), University of Vigo, Tecnopole, Rúa Galicia, 2, Ourense 32900, Spain.
| | - Andrés Moure
- Department of Chemical Engineering, University of Vigo (Campus Ourense), Polytechnical Building, As Lagoas s/n, Ourense 32004, Spain.
- Research Transfer and Innovation Centre (CITI), University of Vigo, Tecnopole, Rúa Galicia, 2, Ourense 32900, Spain.
| | - Herminia Domínguez
- Department of Chemical Engineering, University of Vigo (Campus Ourense), Polytechnical Building, As Lagoas s/n, Ourense 32004, Spain.
- Research Transfer and Innovation Centre (CITI), University of Vigo, Tecnopole, Rúa Galicia, 2, Ourense 32900, Spain.
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Pérez-López P, Balboa EM, González-García S, Domínguez H, Feijoo G, Moreira MT. Comparative environmental assessment of valorization strategies of the invasive macroalgae Sargassum muticum. Bioresour Technol 2014; 161:137-48. [PMID: 24698741 DOI: 10.1016/j.biortech.2014.03.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 12/22/2013] [Revised: 02/27/2014] [Accepted: 03/04/2014] [Indexed: 05/11/2023]
Abstract
The invasive brown seaweed Sargassum muticum (Yendo) exhibits a significant content of phenolic compounds, polysaccharides and fucoxanthin, with potential biological activities. In this study, four valorization strategies for S. muticum biomass were compared under a life cycle perspective. Depending on the alternative, three products were obtained: sodium alginate, antioxidant extract and fucoxanthin-containing extract. Regardless of the approach, the combined extraction of alginate and antioxidant from wet algae constituted the most efficient scenario. Among the stages, supercritical extraction of fucoxanthin and non-isothermal autohydrolysis were identified as the major environmental burdens due to electricity consumption. Although changes in product distribution fairly affected the environmental impacts of the scenarios, the single extraction of antioxidant fraction and the integral valorization to obtain fucoxanthin, alginate and antioxidant were only competitive when considering a functional unit based on the value of the products through an economic allocation approach instead of the amount of valorized algae.
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Affiliation(s)
- Paula Pérez-López
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain.
| | - Elena M Balboa
- Department of Chemical Engineering, Faculty of Sciences, University of Vigo, As Lagoas s/n, 32004 Ourense, Spain
| | - Sara González-García
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Herminia Domínguez
- Department of Chemical Engineering, Faculty of Sciences, University of Vigo, As Lagoas s/n, 32004 Ourense, Spain
| | - Gumersindo Feijoo
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - M Teresa Moreira
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
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Balboa EM, Rivas S, Moure A, Domínguez H, Parajó JC. Simultaneous extraction and depolymerization of fucoidan from Sargassum muticum in aqueous media. Mar Drugs 2013; 11:4612-27. [PMID: 24284426 PMCID: PMC3853749 DOI: 10.3390/md11114612] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [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: 10/09/2013] [Revised: 11/04/2013] [Accepted: 11/05/2013] [Indexed: 11/16/2022] Open
Abstract
The biomass components of the invasive seaweed Sargassum muticum were fractionated to allow their separate valorization. S. muticum (Sm) and the solid residue remaining after alginate extraction of this seaweed (AESm) were processed with hot, compressed water (hydrothermal processing) to assess the effects of temperature on fucoidan solubilization. Fucose-containing oligosaccharides were identified as reaction products. Operating under optimal conditions (170 °C), up to 62 and 85 wt% of the dry mass of Sm and AESm were solubilized, respectively. The reaction media were subjected to precipitation, nanofiltration and freeze-drying. The dried products contained 50% and 85% of the fucoidan present in Sm and AESm, respectively; together with other components such as phenolics and inorganic components. The saccharidic fraction, accounting for up to 35% of the dried extracts, contained fucose as the main sugar, and also galactose, xylose, glucose and mannose. The concentrates were characterized for antioxidant activity using the TEAC assay.
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Affiliation(s)
- Elena M. Balboa
- Department of Chemical Engineering, University of Vigo (Campus Ourense), Polytechnical Building, As Lagoas, Ourense 32004, Spain; E-Mails: (E.M.B.); (S.R.); (A.M.); (J.C.P.)
- Research Transfer and Innovation Centre (CITI), University of Vigo, Tecnopole, Rúa Galicia n° 2, Ourense 32900, Spain
| | - Sandra Rivas
- Department of Chemical Engineering, University of Vigo (Campus Ourense), Polytechnical Building, As Lagoas, Ourense 32004, Spain; E-Mails: (E.M.B.); (S.R.); (A.M.); (J.C.P.)
- Research Transfer and Innovation Centre (CITI), University of Vigo, Tecnopole, Rúa Galicia n° 2, Ourense 32900, Spain
| | - Andrés Moure
- Department of Chemical Engineering, University of Vigo (Campus Ourense), Polytechnical Building, As Lagoas, Ourense 32004, Spain; E-Mails: (E.M.B.); (S.R.); (A.M.); (J.C.P.)
- Research Transfer and Innovation Centre (CITI), University of Vigo, Tecnopole, Rúa Galicia n° 2, Ourense 32900, Spain
| | - Herminia Domínguez
- Department of Chemical Engineering, University of Vigo (Campus Ourense), Polytechnical Building, As Lagoas, Ourense 32004, Spain; E-Mails: (E.M.B.); (S.R.); (A.M.); (J.C.P.)
- Research Transfer and Innovation Centre (CITI), University of Vigo, Tecnopole, Rúa Galicia n° 2, Ourense 32900, Spain
| | - Juan Carlos Parajó
- Department of Chemical Engineering, University of Vigo (Campus Ourense), Polytechnical Building, As Lagoas, Ourense 32004, Spain; E-Mails: (E.M.B.); (S.R.); (A.M.); (J.C.P.)
- Research Transfer and Innovation Centre (CITI), University of Vigo, Tecnopole, Rúa Galicia n° 2, Ourense 32900, Spain
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Balboa EM, Conde E, Moure A, Falqué E, Domínguez H. In vitro antioxidant properties of crude extracts and compounds from brown algae. Food Chem 2013; 138:1764-85. [PMID: 23411309 DOI: 10.1016/j.foodchem.2012.11.026] [Citation(s) in RCA: 220] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Revised: 11/02/2012] [Accepted: 11/06/2012] [Indexed: 01/03/2023]
Abstract
Research on the bioactives from seaweeds has increased in recent years. Antioxidant activity is one of the most studied, due to the interest of these compounds both as preservatives and protectors against oxidation in food and cosmetics and also due to their health implications, mainly in relation to their potential as functional ingredients. Brown algae present higher antioxidant potential in comparison with red and green families and contain compounds not found in terrestrial sources. In vitro antioxidant chemical methods, used as a first approach to evaluate potential agents to protect from lipid oxidation in foods, confirmed that the brown algae crude extracts, fractions and pure components are comparatively similar or superior to synthetic antioxidants. Particular emphasis on the fucoidan and phlorotannin polymeric fractions is given, considering variations associated with the species, collection area, season, and extraction and purification technologies.
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Affiliation(s)
- Elena M Balboa
- Departamento de Enxeñería Química, Universidade de Vigo (Campus Ourense), Edificio Politécnico, As Lagoas, 32004 Ourense, Spain
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