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Davis RA, Cervin G, Beattie KD, Rali T, Fauchon M, Hellio C, Bodin Åkerlund L, Pavia H, Svenson J. Evaluation of natural resveratrol multimers as marine antifoulants. Biofouling 2023; 39:775-784. [PMID: 37822262 DOI: 10.1080/08927014.2023.2263374] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 09/18/2023] [Indexed: 10/13/2023]
Abstract
In the current study we investigate the antifouling potential of three polyphenolic resveratrol multimers (-)-hopeaphenol, vaticanol B and vatalbinoside A, isolated from two species of Anisoptera found in the Papua New Guinean rainforest. The compounds were evaluated against the growth and settlement of eight marine microfoulers and against the settlement and metamorphosis of Amphibalanus improvisus barnacle cyprids. The two isomeric compounds (-)-hopeaphenol and vaticanol B displayed a high inhibitory potential against the cyprid larvae metamorphosis at 2.8 and 1.1 μM. (-)-Hopeaphenol was also shown to be a strong inhibitor of both microalgal and bacterial adhesion at submicromolar concentrations with low toxicity. Resveratrol displayed a lower antifouling activity compared to the multimers and had higher off target toxicity against MCR-5 fibroblasts. This study illustrates the potential of natural products as a valuable source for the discovery of novel antifouling leads with low toxicity.
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Affiliation(s)
- Rohan A Davis
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD, Australia
| | - Gunnar Cervin
- Department of Marine Sciences - Tjärnö, University of Gothenburg, Strömstad, Sweden
| | - Karren D Beattie
- Griffith Institute for Drug Discovery, School of Environment and Science, Griffith University, Brisbane, QLD, Australia
| | - Topul Rali
- School of Natural and Physical Sciences, The University of Papua New Guinea, Port Moresby, Papua New Guinea
| | - Marilyne Fauchon
- Laboratoire des Sciences de l'Environnement MARin (LEMAR), CNRS, IRD, IFREMER, University of Brest, Brest, France
| | - Claire Hellio
- Laboratoire des Sciences de l'Environnement MARin (LEMAR), CNRS, IRD, IFREMER, University of Brest, Brest, France
| | - Lovisa Bodin Åkerlund
- Department of Biological Function, RISE Research Institutes of Sweden, Borås, Sweden
| | - Henrik Pavia
- Department of Marine Sciences - Tjärnö, University of Gothenburg, Strömstad, Sweden
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Buscaglia M, Guérard F, Roquefort P, Aubry T, Fauchon M, Toueix Y, Stiger-Pouvreau V, Hellio C, Le Blay G. Mechanically Enhanced Salmo salar Gelatin by Enzymatic Cross-linking: Premise of a Bioinspired Material for Food Packaging, Cosmetics, and Biomedical Applications. Mar Biotechnol (NY) 2022; 24:801-819. [PMID: 35915285 DOI: 10.1007/s10126-022-10150-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
Marine animal by-products of the food industry are a great source of valuable biomolecules. Skins and bones are rich in collagen, a protein with various applications in food, cosmetic, healthcare, and medical industries in its native form or partially hydrolyzed (gelatin). Salmon gelatin is a candidate of interest due to its high biomass production available through salmon consumption, its biodegradability, and its high biocompatibility. However, its low mechanical and thermal properties can be an obstacle for various applications requiring cohesive material. Thus, gelatin modification by cross-linking is necessary. Enzymatic cross-linking by microbial transglutaminase (MTG) is preferred to chemical cross-linking to avoid the formation of potentially cytotoxic residues. In this work, the potential of salmon skin gelatin was investigated, in a comparative study with porcine gelatin, and an enzymatic versus chemical cross-linking analysis. For this purpose, the two cross-linking methods were applied to produce three-dimensional, porous, and mechanically reinforced hydrogels and sponges with different MTG ratios (2%, 5%, and 10% w/w gelatin). Their biochemical, rheological, and structural properties were characterized, as well as the stability of the material, including the degree of syneresis and the water-binding capacity. The results showed that gelatin enzymatically cross-linked produced material with high cross-linking densities over 70% of free amines. The MTG addition seemed to play a crucial role, as shown by the increase in mechanical and thermal resistances with the production of a cohesive material stable above 40 °C for at least 7 days and comparable to porcine and chemically cross-linked gelatins. Two prototypes were obtained with similar thermal resistances but different microstructures and viscoelastic properties, due to different formation dynamics of the covalent network. Considering these results, the enzymatically cross-linked salmon gelatin is a relevant candidate as a biopolymer for the production of matrix for a wide range of biotechnological applications such as food packaging, cosmetic patch, wound healing dressing, or tissue substitute.
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Affiliation(s)
- Manon Buscaglia
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | - Fabienne Guérard
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | - Philippe Roquefort
- UMR CNRS 6027, IRDL, Université de Bretagne Occidentale, 29200, Brest, France
| | - Thierry Aubry
- UMR CNRS 6027, IRDL, Université de Bretagne Occidentale, 29200, Brest, France
| | - Marilyne Fauchon
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | - Yannick Toueix
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
| | | | - Claire Hellio
- Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
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Quémener M, Kikionis S, Fauchon M, Toueix Y, Aulanier F, Makris AM, Roussis V, Ioannou E, Hellio C. Antifouling Activity of Halogenated Compounds Derived from the Red Alga Sphaerococcus coronopifolius: Potential for the Development of Environmentally Friendly Solutions. Mar Drugs 2021; 20:md20010032. [PMID: 35049887 PMCID: PMC8778584 DOI: 10.3390/md20010032] [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: 12/02/2021] [Revised: 12/23/2021] [Accepted: 12/23/2021] [Indexed: 11/24/2022] Open
Abstract
Nowadays, biofouling is responsible for enormous economic losses in the maritime sector, and its treatment with conventional antifouling paints is causing significant problems to the environment. Biomimetism and green chemistry approaches are very promising research strategies for the discovery of new antifouling compounds. This study focused on the red alga Sphaerococcus coronopifolius, which is known as a producer of bioactive secondary metabolites. Fifteen compounds, including bromosphaerol (1), were tested against key marine biofoulers (five marine bacteria and three microalgae) and two enzymes associated with the adhesion process in macroalgae and invertebrates. Each metabolite presented antifouling activity against at least one organism/enzyme. This investigation also revealed that two compounds, sphaerococcinol A (4) and 14R-hydroxy-13,14-dihydro-sphaerococcinol A (5), were the most potent compounds without toxicity towards oyster larvae used as non-target organisms. These compounds are of high potential as they are active towards key biofoulers and could be produced by a cultivable alga, a fact that is important from the green chemistry point of view.
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Affiliation(s)
- Maxence Quémener
- Laboratoire des Sciences de l’Environnement Marin (LEMAR), Université de Brest, CNRS, IRD, Ifremer, F-29280 Plouzané, France; (M.Q.); (M.F.); (Y.T.); (F.A.)
| | - Stefanos Kikionis
- Section of Pharmacognosy and Chemistry of Natural Products, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece; (S.K.); (V.R.)
| | - Marilyne Fauchon
- Laboratoire des Sciences de l’Environnement Marin (LEMAR), Université de Brest, CNRS, IRD, Ifremer, F-29280 Plouzané, France; (M.Q.); (M.F.); (Y.T.); (F.A.)
| | - Yannick Toueix
- Laboratoire des Sciences de l’Environnement Marin (LEMAR), Université de Brest, CNRS, IRD, Ifremer, F-29280 Plouzané, France; (M.Q.); (M.F.); (Y.T.); (F.A.)
| | - Fanny Aulanier
- Laboratoire des Sciences de l’Environnement Marin (LEMAR), Université de Brest, CNRS, IRD, Ifremer, F-29280 Plouzané, France; (M.Q.); (M.F.); (Y.T.); (F.A.)
| | - Antonios M. Makris
- Institute of Applied Biosciences, Centre for Research & Technology, Hellas (CERTH), 570 01 Thessaloniki, Greece;
| | - Vassilios Roussis
- Section of Pharmacognosy and Chemistry of Natural Products, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece; (S.K.); (V.R.)
| | - Efstathia Ioannou
- Section of Pharmacognosy and Chemistry of Natural Products, Department of Pharmacy, National and Kapodistrian University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece; (S.K.); (V.R.)
- Correspondence: (E.I.); (C.H.)
| | - Claire Hellio
- Laboratoire des Sciences de l’Environnement Marin (LEMAR), Université de Brest, CNRS, IRD, Ifremer, F-29280 Plouzané, France; (M.Q.); (M.F.); (Y.T.); (F.A.)
- Correspondence: (E.I.); (C.H.)
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Levert A, Foulon V, Fauchon M, Tapissier-Bontemps N, Banaigs B, Hellio C. Antifouling Activity of Meroterpenes Isolated from the Ascidian Aplidium aff. densum. Mar Biotechnol (NY) 2021; 23:51-61. [PMID: 33094389 DOI: 10.1007/s10126-020-10000-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 09/25/2020] [Indexed: 06/11/2023]
Abstract
The settlement and growth of fouling organisms on man-made surfaces can be prevented by the application of antifouling paints containing active compounds (biocides, heavy metals), most of which are toxic to non-target organisms. As part of our research program in chemical ecology and blue biotechnology, we are conducting studies to investigate the natural defence mechanisms of marine organisms that are free from epibionts, with the aim of isolating molecules involved in surface defence that could be good candidates as antifouling agents. Ascidians were selected for our investigation because previous studies have shown that they contain abundant and diverse secondary metabolites, which play a defensive role and have been applied to drug discovery. It is therefore relevant to study the role of such secondary metabolites in surface protection. In this study, 5 meroterpenoids (cordiachromene A, didehydroconicol, epiconicol, methoxyconidiol, conidione) from Aplidium aff. densum (ascidian) were investigated as potential antifoulants towards the inhibition of bacterial growth and settlement inhibition of barnacles. Cardiochromene A (IC50 barnacle settlement = 6.04 μg/mL; MIC Gram positive = 125 μg/mL; MIC Gram negative = 32 μg/mL) and epiconicol (IC50 barnacle settlement = 8.05 μg/mL; MIC Bacillus = 63 μg/mL; MIC other strains = 32 μg/mL) were the most promising compounds among those tested in this study.
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Affiliation(s)
- Annabel Levert
- Université de Perpignan, USR CNRS-EPHE-UPVD 3278, CRIOBE, 66860, Perpignan Cedex, France
- AkiNaO SAS, 58 avenue Paul Alduy, 66000, Perpignan, France
| | - Valentin Foulon
- Laboratoire des Sciences de l'Environnement Marin (LEMAR) CNRS, IRD, Ifremer, Univ Brest, Plouzané, F-29280, France
| | - Marilyne Fauchon
- Laboratoire des Sciences de l'Environnement Marin (LEMAR) CNRS, IRD, Ifremer, Univ Brest, Plouzané, F-29280, France
| | - Nathalie Tapissier-Bontemps
- Université de Perpignan, USR CNRS-EPHE-UPVD 3278, CRIOBE, 66860, Perpignan Cedex, France
- Laboratoire d'Excellence "CORAIL", Perpignan, France
| | - Bernard Banaigs
- Université de Perpignan, USR CNRS-EPHE-UPVD 3278, CRIOBE, 66860, Perpignan Cedex, France
- Laboratoire d'Excellence "CORAIL", Perpignan, France
| | - Claire Hellio
- Laboratoire des Sciences de l'Environnement Marin (LEMAR) CNRS, IRD, Ifremer, Univ Brest, Plouzané, F-29280, France.
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Tintillier F, Moriou C, Petek S, Fauchon M, Hellio C, Saulnier D, Ekins M, Hooper JNA, Al-Mourabit A, Debitus C. Quorum Sensing Inhibitory and Antifouling Activities of New Bromotyrosine Metabolites from the Polynesian Sponge Pseudoceratina n. sp. Mar Drugs 2020; 18:E272. [PMID: 32455754 PMCID: PMC7281015 DOI: 10.3390/md18050272] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/15/2020] [Accepted: 05/19/2020] [Indexed: 01/11/2023] Open
Abstract
Four new brominated tyrosine metabolites, aplyzanzines C-F (1-4), were isolated from the French Polynesian sponge Pseudoceratina n. sp., along with the two known 2-aminoimidazolic derivatives, purealidin A (5) and 6, previously isolated, respectively, from the sponges Psammaplysilla purpurea and Verongula sp. Their structures were assigned based on the interpretation of their NMR and HRMS data. The compounds exhibited quorum sensing inhibition (QSi) and antifouling activities against several strains of bacteria and microalgae. To our knowledge, the QSi activity of this type of bromotyrosine metabolite is described here for the first time.
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Affiliation(s)
- Florent Tintillier
- IRD, Univ de la Polynésie française, Ifremer, ILM, EIO, F-98713 Papeete, French Polynesia; (F.T.); (C.D.)
| | - Céline Moriou
- CNRS, Institut de Chimie des Substances Naturelles, Université Paris-Saclay, 91190 Gif-sur-Yvette, France; (C.M.); (A.A.-M.)
| | - Sylvain Petek
- IRD, Univ de la Polynésie française, Ifremer, ILM, EIO, F-98713 Papeete, French Polynesia; (F.T.); (C.D.)
- IRD, Univ Brest, CNRS, Ifremer, LEMAR, F-29280 Plouzane, France; (M.F.); (C.H.)
| | - Marilyne Fauchon
- IRD, Univ Brest, CNRS, Ifremer, LEMAR, F-29280 Plouzane, France; (M.F.); (C.H.)
| | - Claire Hellio
- IRD, Univ Brest, CNRS, Ifremer, LEMAR, F-29280 Plouzane, France; (M.F.); (C.H.)
| | - Denis Saulnier
- Ifremer, IRD, ILM, Univ de la Polynésie française, EIO, F-98719 Taravao, French Polynesia;
| | - Merrick Ekins
- Queensland Museum, PO Box 3300, South Brisbane BC 4101, Queensland, Australia; (M.E.); (J.N.A.H.)
| | - John N. A. Hooper
- Queensland Museum, PO Box 3300, South Brisbane BC 4101, Queensland, Australia; (M.E.); (J.N.A.H.)
| | - Ali Al-Mourabit
- CNRS, Institut de Chimie des Substances Naturelles, Université Paris-Saclay, 91190 Gif-sur-Yvette, France; (C.M.); (A.A.-M.)
| | - Cécile Debitus
- IRD, Univ de la Polynésie française, Ifremer, ILM, EIO, F-98713 Papeete, French Polynesia; (F.T.); (C.D.)
- IRD, Univ Brest, CNRS, Ifremer, LEMAR, F-29280 Plouzane, France; (M.F.); (C.H.)
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Bovio E, Fauchon M, Toueix Y, Mehiri M, Varese GC, Hellio C. The Sponge-Associated Fungus Eurotium chevalieri MUT 2316 and its Bioactive Molecules: Potential Applications in the Field of Antifouling. Mar Biotechnol (NY) 2019; 21:743-752. [PMID: 31494811 DOI: 10.1007/s10126-019-09920-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 05/29/2019] [Accepted: 08/20/2019] [Indexed: 06/10/2023]
Abstract
The need for new environmentally friendly antifouling and the observation that many marine organisms have developed strategies to keep their surface free of epibionts has stimulated the search for marine natural compounds with antifouling activities. Sponges and in particular fungi associated with them represent one of the most appropriate sources of defence molecules and could represent a promising biomass for the supply of new antifouling compounds. The objective of this work was therefore to evaluate the antifouling potency of 7 compounds isolated from the sponge derived fungus Eurotium chevalieri MUT 2316. The assessment of their activity targeted the inhibition of the adhesion and/or growth of selected marine bacteria (5) and microalgae (5), as well as the inhibition of the mussel's byssus thread formation (tyrosinase activity). The 7 compounds showed bioactivity, with various levels of selectivity for species. Cyclo-L-Trp-L-Ala was the most promising active compound, and led to the inhibition, at very low concentrations (0.001 μg ml-1 in 61.5% of cases), of adhesion and growth of all the microalgae, of selected bacteria, and towards the inhibition of tyrosinase. Promising results were also obtained for echinulin, neoechinulin A, dihydroauroglaucin and flavoglaucin, respectively, leading to inhibition of adhesion and/or growth of 9, 7, 8 and 8 microfouling species at various concentrations.
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Affiliation(s)
- Elena Bovio
- Mycotheca Universitatis Taurinensis, Department of Life Sciences and Systems Biology, University of Turin, Viale Mattioli 25, 10125, Turin, Italy
- CNRS, Nice Institute of Chemistry, UMR 7272, Marine Natural Products Team, University Nice Côte d'Azur, 60103, Nice, France
| | - Marilyne Fauchon
- University Brest, CNRS, IRD, Ifremer, LEMAR, Institut Universitaire Européen de la Mer, F-29280, Plouzané, France
| | - Yannick Toueix
- University Brest, CNRS, IRD, Ifremer, LEMAR, Institut Universitaire Européen de la Mer, F-29280, Plouzané, France
| | - Mohamed Mehiri
- CNRS, Nice Institute of Chemistry, UMR 7272, Marine Natural Products Team, University Nice Côte d'Azur, 60103, Nice, France
| | - Giovanna Cristina Varese
- Mycotheca Universitatis Taurinensis, Department of Life Sciences and Systems Biology, University of Turin, Viale Mattioli 25, 10125, Turin, Italy.
| | - Claire Hellio
- University Brest, CNRS, IRD, Ifremer, LEMAR, Institut Universitaire Européen de la Mer, F-29280, Plouzané, France.
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Messina CM, Renda G, Laudicella VA, Trepos R, Fauchon M, Hellio C, Santulli A. From Ecology to Biotechnology, Study of the Defense Strategies of Algae and Halophytes (from Trapani Saltworks, NW Sicily) with a Focus on Antioxidants and Antimicrobial Properties. Int J Mol Sci 2019; 20:E881. [PMID: 30781640 PMCID: PMC6412379 DOI: 10.3390/ijms20040881] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Revised: 02/12/2019] [Accepted: 02/14/2019] [Indexed: 11/16/2022] Open
Abstract
This study aimed at the characterization of the antioxidant power of polyphenol extracts (PE) obtained from the algae Cystoseira foeniculacea (CYS) (Phaeophyta) and from the halophyte Halocnemum strobilaceum (HAL), growing in the solar saltworks of western Sicily (Italy), and at the evaluation of their anti-microfouling properties, in order to correlate these activities to defense strategies in extreme environmental conditions. The antioxidant properties were assessed in the PE based on the total antioxidant activity test and the reducing power test; the anti-microfouling properties of the two PE were evaluated by measuring the growth inhibition of marine fish and shellfish pathogen bacteria as well as marine surface fouling bacteria and microalgae exposed to the fractions. Similar polyphenol content (CYS 5.88 ± 0.75 and HAL 6.03 ± 0.25 mg gallic acid equivalents (GAE) g-1 dried weight, DW) and similar reducing power percentage (93.91 ± 4.34 and 90.03 ± 6.19) were recorded for both species, even if they exhibited a different total antioxidant power (measured by the percentage of inhibition of the radical 2,2 diphenyl-1-picrylhydrazyl DPPH), with CYS (79.30) more active than HAL (59.90). Both PE showed anti-microfouling properties, being inhibitors of adhesion and growth of marine fish and shellfish pathogen bacteria (V. aestuarianus, V. carchariae, V. harveyi, P. elyakovii, H. aquamarina) and fouling bacteria (V. natriegens, V. proteolyticus, P. iirgensii, R. litoralis) with minimum inhibitory concentrations comparable to the commercial antifouling products used as a positive control (SEA-NINE™ 211N). Only CYS was a significant inhibitor of the microalgae strains tested, being able to reduce E. gayraliae and C. closterium growth (MIC 10 µg·mL-1) and the adhesion of all three strains tested (E. gayraliae, C. closterium and P. purpureum), suggesting its promise for use as an antifouling (AF) product.
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Affiliation(s)
- Concetta Maria Messina
- Dipartimento di Scienze della terra e del Mare DiSTeM, Laboratorio di Biochimica Marina ed Ecotossicologia, Università degli Studi di Palermo, Via G. Barlotta 4, 91100 Trapani, Italy.
| | - Giuseppe Renda
- Dipartimento di Scienze della terra e del Mare DiSTeM, Laboratorio di Biochimica Marina ed Ecotossicologia, Università degli Studi di Palermo, Via G. Barlotta 4, 91100 Trapani, Italy.
| | - Vincenzo Alessandro Laudicella
- Dipartimento di Scienze della terra e del Mare DiSTeM, Laboratorio di Biochimica Marina ed Ecotossicologia, Università degli Studi di Palermo, Via G. Barlotta 4, 91100 Trapani, Italy.
- Istituto di Biologia Marina, Consorzio Universitario della Provincia di Trapani, Via G. Barlotta 4, 91100 Trapani, Italy.
| | - Rozenn Trepos
- Biodimar, Laboratoire des Sciences de l'Environnement Marin (LEMAR), UMR 6539, UBO/IUEM, 29200 Brest, France.
| | - Marilyne Fauchon
- Biodimar, Laboratoire des Sciences de l'Environnement Marin (LEMAR), UMR 6539, UBO/IUEM, 29200 Brest, France.
| | - Claire Hellio
- Biodimar, Laboratoire des Sciences de l'Environnement Marin (LEMAR), UMR 6539, UBO/IUEM, 29200 Brest, France.
| | - Andrea Santulli
- Dipartimento di Scienze della terra e del Mare DiSTeM, Laboratorio di Biochimica Marina ed Ecotossicologia, Università degli Studi di Palermo, Via G. Barlotta 4, 91100 Trapani, Italy.
- Istituto di Biologia Marina, Consorzio Universitario della Provincia di Trapani, Via G. Barlotta 4, 91100 Trapani, Italy.
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Dufourcq R, Chalkiadakis E, Fauchon M, Deslandes E, Kerjean V, Chanteau S, Petit E, Guezennec J, Dupont-Rouzeyrol M. Isolation and partial characterization of bacteria (Pseudoalteromonas sp.) with potential antibacterial activity from a marine costal environment from New Caledonia. Lett Appl Microbiol 2013; 58:102-8. [PMID: 24106876 DOI: 10.1111/lam.12162] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2013] [Revised: 09/12/2013] [Accepted: 09/13/2013] [Indexed: 11/29/2022]
Abstract
UNLABELLED Marine bacteria are a rich source of bioactive metabolites. However, the microbial diversity of marine ecosystem still needs to be explored. The aim of this study was to isolate and characterize bacteria with antimicrobial activities from various marine coastal environment of New Caledonia. We obtained 493 marine isolates from various environments and samples of which 63 (12.8%) presented an antibacterial activity against a panel of reference pathogenic strains (Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli and Enterococcus faecalis). Ten out of the most promising strains were cultured, fractionated and screened for antibacterial activity. Four of them (NC282, NC412, NC272 and NC120) showed at least an activity against reference and multidrug-resistant pathogenic strains and were found to belong to the genus Pseudoalteromonas, according to the 16S phylogenetic analysis. The NC282 strain does not belong to any described Pseudoalteromonas species and might be of interest for further chemical and biological characterization. These findings suggest that the identified strains may contribute to the discovery for new sources of antimicrobial substances to develop new therapies to treat infections caused by multidrug-resistant bacteria. SIGNIFICANCE AND IMPACT OF THE STUDY With the constant increasing of bacterial resistance against known antibiotics in worldwide public health, it is now necessary to find new sources of antimicrobials. Marine bacteria from New Caledonia were isolated, tested for antibacterial activity and characterized to find new active molecules against multidrug-resistant bacteria. This study illustrates the diversity of the marine ecosystem with potent new bacteria species. Also the potential of marine bacteria as a rich source of bioactive molecule, for example antibiotics, is highlighted.
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Affiliation(s)
- R Dufourcq
- URE-DA (former Laboratoire d'Epidémiologie Moléculaire), Institut Pasteur de Nouvelle-Calédonie, Réseau International des Instituts Pasteur, Nouméa, Nouvelle-Calédonie, France
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Audibert L, Fauchon M, Blanc N, Hauchard D, Gall EA. Phenolic compounds in the brown seaweed Ascophyllum nodosum: distribution and radical-scavenging activities. Phytochem Anal 2010; 21:399-405. [PMID: 20333652 DOI: 10.1002/pca.1210] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2009] [Accepted: 01/20/2010] [Indexed: 05/29/2023]
Abstract
INTRODUCTION Phenolic compounds are metabolites exhibited at high levels in Phaeophyceae. Although several studies have been conducted on total phenol contents, no one to our knowledge has dealt with the contents of phenolic compounds and antioxidant activities on purified fractions. OBJECTIVE The purpose of this study was the extraction and purification of phenolic compounds from the brown seaweed Ascophylllum nodosum, to determine both their distribution and their radical-scavenging activities, and to obtain a sufficiently purified oligophenolic fraction to perform an RP-HPLC analysis on molecules with a molecular weight (MW) < 2 kDa. METHODOLOGY Phenolic compounds were separated and purified by liquid-liquid extraction, tangential ultrafiltration and dialysis. Then, the contents of both phenolic compounds and radical-scavenging activities were measured by the Folin-Ciocalteu reagent, and DPPH and ABTS assays. NMR analysis was performed to validate the process. RP-HPLC with a C(18) column was performed on the oligophenolic fraction, using a novel method developed in this study. RESULTS Seven fractions were obtained as a function of polarity and molecular weight. Among them, the fraction containing phenolic compounds with a MW ≥ 50 kDa appeared to be the most active, correlated with the content of phenolic compounds. CONCLUSION This work constitutes a step forward in the separation and purification of bioactive phlorotannins and represents a prerequisite for further investigations into their structural characterisation and distribution in A. nodosum.
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Affiliation(s)
- Laetitia Audibert
- Laboratoire d'Ecophysiologie et de Biotechnologies des Halophytes et des Algues Marines, Europeen Institute of Marine Studies-University of West Brittany, Technopole Brest-Iroise, place Nicolas Copernic, 29280 Plouzané, Brittany, France.
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Zubia M, Fabre MS, Kerjean V, Lann KL, Stiger-Pouvreau V, Fauchon M, Deslandes E. Antioxidant and antitumoural activities of some Phaeophyta from Brittany coasts. Food Chem 2009. [DOI: 10.1016/j.foodchem.2009.03.025] [Citation(s) in RCA: 165] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Biggart S, Chin D, Fauchon M, Cardew G, du Fou L, Harker N, Quinn E, Keller C, Vincent R, Mayne L. Association of genetic polymorphisms in the ACE, ApoE, and TGF beta genes with early onset ischemic heart disease. Clin Cardiol 2009; 21:831-6. [PMID: 9825196 PMCID: PMC6656254 DOI: 10.1002/clc.4960211109] [Citation(s) in RCA: 16] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND The genetic factors that contribute to ischemic heart disease (IHD) are poorly understood, and it is likely that multiple genes acting independently or synergistically contribute to the risk of IHD and outcome. The genes for angiotensin-converting enzyme (ACE) and apolipoprotein E (ApoE) have been implicated independently in the risk of IHD. HYPOTHESIS This study examined whether genetic polymorphisms in the ACE and ApoE genes are associated with early onset IHD. Polymorphisms in a third gene, transforming growth factor beta 2 (TGF beta 2), with a known role in wound repair and cardiac development, are also examined with respect to early onset IHD. METHODS In all, 101 patients with IHD and onset of disease before 55 years for men and 60 years for women, and 100 controls with angiographically confirmed normal coronary arteries were recruited for this study. The ACE, ApoE, and TGF beta 2 genotypes were determined by polymerase chain reaction amplification or Southern blotting and were compared with the patient's clinical and family histories. RESULTS AND CONCLUSION The frequency of the ACE D allele was significantly lower in the patient group (0.475) than in the control group (0.59, p = 0.03), which was attributed to a reduction in the number of patients with the DD genotype (patients: 24% DD, controls: 33% DD). Sudden cardiac death was also associated with the DD genotype. These data are consistent with the ACE D allele contributing to a fatal outcome. No association between the DD genotype and risk of myocardial infarction, presenting age, extent of vessel disease, family history, hypertension, or hypercholesterolemia was seen. Analysis of the ApoE genotype showed no association with early onset IHD. There was no evidence for a synergistic effect between the ACE and ApoE genotypes on the risk of early onset IHD. A polymorphism in the TGF beta 2 gene was rare and not associated with early onset IHD.
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Affiliation(s)
- S Biggart
- Cardiac Department, St. Thomas's Hospital, London, United Kingdom
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Abstract
Combinatorial assembly of nucleotide libraries and their antiviral evaluation against HSV-1 are described.
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Affiliation(s)
- Y Jin
- Origenix Technologies Inc., Laval, Quebec, Canada
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Dupérat VG, Fauchon M, Nurden AT, Vergnes C. Simple and rapid combined genetic diagnosis of mutation (1691 G-->A) of the factor V gene and (20210 G-->A) of the prothrombin gene. Blood Coagul Fibrinolysis 1998; 9:549-51. [PMID: 9819006 DOI: 10.1097/00001721-199809000-00013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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: 11/26/2022]
Abstract
We have developed a rapid method which allows us simultaneously to determine two genetic variations that are associated with an increased risk of venous thrombosis: the 20210 G-->A mutation present in the 3'-UT region of the prothrombin gene and the 1691 G-->A mutation giving rise to factor V Leiden. Our strategy involves the coamplification of exon 10 of the factor V gene and of the region 3' from the prothrombin gene using modified oligonucleotides, permitting the introduction of a single HindIII cleavage site in fragments bearing one of the mutations. As a result of its time- and cost-saving features, this combined method should be considered for screening large numbers of patients.
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Affiliation(s)
- V G Dupérat
- CNRS UMR 5533, Hôpital Cardiologique, Pessac, France
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Abstract
During productive infection of human T lymphocytes in cell culture, the expression of human immunodeficiency virus type 1 is temporally regulated by virus-encoded regulatory proteins. Among these Nef, whose function has not been clearly elucidated, is thought to alter CD4+ T cells. We examined the possibility that the nef gene interferes with the translation process in a cell-free system. The results demonstrate that the nef gene product mediates an inhibitory effect on protein synthesis. Conversely, the use of antisense nef mRNA did not affect translation. Further observations suggest that this inhibitory effect is an inherent property of the nef gene product itself and not of its mRNA. The data show that the translational repression directed by Nef is a general phenomenon, acting on its own and on other messengers used as reporter mRNAs. We propose that, as a consequence, Nef can play an important role in the pathogenesis of AIDS.
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Affiliation(s)
- L Poulin
- Centre de Recherche du CHUL, Université Laval, Québec, Canada
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