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Wissner JL, Almeida JR, Grilo IR, Oliveira JF, Brízida C, Escobedo-Hinojosa W, Pissaridou P, Vasquez MI, Cunha I, Sobral RG, Vasconcelos V, Gaudêncio SP. Novel metabolite madeirone and neomarinone extracted from Streptomyces aculeoletus as marine antibiofilm and antifouling agents. Front Chem 2024; 12:1425953. [PMID: 39119516 PMCID: PMC11306024 DOI: 10.3389/fchem.2024.1425953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Accepted: 06/27/2024] [Indexed: 08/10/2024] Open
Abstract
Introduction: Biofouling poses a significant economic threat to various marine industries, leading to financial losses that can reach billions of euros annually. This study highlights the urgent need for effective alternatives to traditional antifouling agents, particularly following the global ban on organotin compounds. Material and methods: Streptomyces aculeolatus PTM-346 was isolated from sediment samples on the shores of the Madeira Archipelago, Portugal. The crude extract was fractionated using silica flash chromatography and preparative HPLC, resulting in two isolated marinone compounds: madeirone (1), a novel marinone derivative discovered in this study, and neomarinone (2). The antifouling activities of these compounds were tested against five marine bacterial species and the larvae of the mussel Mytilus galloprovincialis. Additionally, in silico and in vivo environmental toxicity evaluations of madeirone (1) and neomarinone (2) were conducted. Results: Madeirone (1) demonstrated significant antibiofilm efficacy, inhibiting Phaeobacter inhibens by up to 66%, Marinobacter hydrocarbonoclasticus by up to 60%, and Cobetia marina by up to 40%. Neomarinone (2) also exhibited substantial antibiofilm activity, with inhibition rates of up to 41% against P. inhibens, 40% against Pseudo-oceanicola batsensis, 56% against M. hydrocarbonoclasticus, 46% against C. marina, and 40% against Micrococcus luteus. The growth inhibition activity at the same concentrations of these compounds remained below 20% for the respective bacteria, highlighting their effectiveness as potent antibiofilm agents without significantly affecting bacterial viability. Additionally, both compounds showed potent effects against the settlement of Mytilus galloprovincialis larvae, with EC50 values of 1.76 µg/mL and 0.12 µg/mL for compounds (1) and (2), respectively, without impairing the viability of the targeted macrofouling species. In silico toxicity predictions and in vivo toxicity assays both support their potential for further development as antifouling agents. Conclusion: The newly discovered metabolite madeirone (1) and neomarinone (2) effectively inhibit both micro- and macrofouling. This distinct capability sets them apart from existing commercial antifouling agents and positions them as promising candidates for biofouling prevention. Consequently, these compounds represent a viable and environmentally friendly alternative for incorporation into paints, primers, varnishes, and sealants, offering significant advantages over traditional copper-based compounds.
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Affiliation(s)
- Julian L. Wissner
- Associate Laboratory i4HB, Institute for Health and Bioeconomy, NOVA Faculty of Sciences and Technology, NOVA University of Lisbon, Lisbon, Portugal
- UCIBIO, Applied Molecular Biosciences Unit, Chemistry and Life Sciences Departments, NOVA Faculty of Sciences and Technology, NOVA University of Lisbon, Lisbon, Portugal
- Unidad de Química en Sisal, Facultad de Química, Universidad Nacional Autónoma de México, Yucatán, Mexico
| | - Joana R. Almeida
- CIIMAR/CIMAR—Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Matosinhos, Portugal
| | - Inês R. Grilo
- Associate Laboratory i4HB, Institute for Health and Bioeconomy, NOVA Faculty of Sciences and Technology, NOVA University of Lisbon, Lisbon, Portugal
- UCIBIO, Applied Molecular Biosciences Unit, Chemistry and Life Sciences Departments, NOVA Faculty of Sciences and Technology, NOVA University of Lisbon, Lisbon, Portugal
| | - Jhenifer F. Oliveira
- Associate Laboratory i4HB, Institute for Health and Bioeconomy, NOVA Faculty of Sciences and Technology, NOVA University of Lisbon, Lisbon, Portugal
- UCIBIO, Applied Molecular Biosciences Unit, Chemistry and Life Sciences Departments, NOVA Faculty of Sciences and Technology, NOVA University of Lisbon, Lisbon, Portugal
| | - Carolina Brízida
- Associate Laboratory i4HB, Institute for Health and Bioeconomy, NOVA Faculty of Sciences and Technology, NOVA University of Lisbon, Lisbon, Portugal
- UCIBIO, Applied Molecular Biosciences Unit, Chemistry and Life Sciences Departments, NOVA Faculty of Sciences and Technology, NOVA University of Lisbon, Lisbon, Portugal
| | - Wendy Escobedo-Hinojosa
- Associate Laboratory i4HB, Institute for Health and Bioeconomy, NOVA Faculty of Sciences and Technology, NOVA University of Lisbon, Lisbon, Portugal
- UCIBIO, Applied Molecular Biosciences Unit, Chemistry and Life Sciences Departments, NOVA Faculty of Sciences and Technology, NOVA University of Lisbon, Lisbon, Portugal
- Unidad de Química en Sisal, Facultad de Química, Universidad Nacional Autónoma de México, Yucatán, Mexico
| | - Panayiota Pissaridou
- Department of Chemical Engineering, Cyprus University of Technology, Limassol, Cyprus
| | - Marlen I. Vasquez
- Department of Chemical Engineering, Cyprus University of Technology, Limassol, Cyprus
| | - Isabel Cunha
- CIIMAR/CIMAR—Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Matosinhos, Portugal
| | - Rita G. Sobral
- Associate Laboratory i4HB, Institute for Health and Bioeconomy, NOVA Faculty of Sciences and Technology, NOVA University of Lisbon, Lisbon, Portugal
- UCIBIO, Applied Molecular Biosciences Unit, Chemistry and Life Sciences Departments, NOVA Faculty of Sciences and Technology, NOVA University of Lisbon, Lisbon, Portugal
| | - Vítor Vasconcelos
- CIIMAR/CIMAR—Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Matosinhos, Portugal
- Biology Department, Faculty of Sciences, Porto University, Porto, Portugal
| | - Susana P. Gaudêncio
- Associate Laboratory i4HB, Institute for Health and Bioeconomy, NOVA Faculty of Sciences and Technology, NOVA University of Lisbon, Lisbon, Portugal
- UCIBIO, Applied Molecular Biosciences Unit, Chemistry and Life Sciences Departments, NOVA Faculty of Sciences and Technology, NOVA University of Lisbon, Lisbon, Portugal
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Abdelrazek HM, Ghozlan HA, Sabry SA, Abouelkheir SS. Copper oxide nanoparticles (CuO-NPs) as a key player in the production of oil-based paint against biofilm and other activities. Heliyon 2024; 10:e29758. [PMID: 38720728 PMCID: PMC11076648 DOI: 10.1016/j.heliyon.2024.e29758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Revised: 04/12/2024] [Accepted: 04/15/2024] [Indexed: 05/12/2024] Open
Abstract
Copper oxide nanoparticles are among the metal nanoparticles gaining popularity in many biotechnological fields, particularly in marine environments. Their antimicrobial and antibiofilm activities make them appealing to many researchers. Among the various methods of producing nanoparticles, biosynthesis is crucial. Thus, a large number of reports have been made about the microbiological manufacture of these nanoparticles by bacteria. Nevertheless, bio-production by means of the cell-free supernatant of marine bacteria is still in its primary phase. This is landmark research to look at how bacteria make a lot (14 g/L) of copper oxide nanoparticles (CuO-NPs) via the cell-free supernatant of Bacillus siamensis HS, their characterization, and their environmental and medical approaches. The biosynthesized nanoparticles were characterized using a UV-visible spectrum range that provides two maximum absorption peaks, one obtained at 400 nm and the other around 550-600 nm. Diffraction of X-rays (XRD) clarifies that the size of the NPs obtained was estimated to be 18 nm using Debye-Scherrer's equation. Scanning electron microscope-energy dispersive X-ray spectroscopy (SEM-EDX) displays 91.93 % copper oxide purity. The Transmission Electron Microscope (TEM) image proves that the particles have a spherical form and an average diameter of 6.54-8.60 nm. At the environmental level, nanoparticles incorporated into oil-based paint can be used as antibiofilm tools to diminish the biofilm formed on the submerged surface in the marine environment. In disease management, NPs can be used as a wound healing agent to reduce the wound gap size as well as an anti-tumour agent to control liver cancer cells (hepatoma cells (HepG2)).
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Affiliation(s)
- Hanan M. Abdelrazek
- Faculty of Science, Alexandria University, Moharrem Bey, 21511 Alexandria, Egypt
| | - Hanan A. Ghozlan
- Faculty of Science, Alexandria University, Moharrem Bey, 21511 Alexandria, Egypt
| | - Soraya A. Sabry
- Faculty of Science, Alexandria University, Moharrem Bey, 21511 Alexandria, Egypt
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Cagnola GN, Cabrera JN, Negri RM, D'Accorso NB, Lizarraga L, Pettinari MJ. Biofilm Formation of Two Different Marine Bacteria on Modified PDMS Surfaces is Affected by Surface Roughness and Topography. Curr Microbiol 2023; 80:256. [PMID: 37357232 DOI: 10.1007/s00284-023-03370-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 06/08/2023] [Indexed: 06/27/2023]
Abstract
Different strategies were tested to reduce biofilm formation of the model marine bacteria Cobetia marina and Marinobacter hydrocarbonoclasticus on cross-linked polydimethylsiloxane (PDMS) coated aluminum and cellulose acetate surfaces modified by addition of multi-walled carbon nanotubes (MWCNT) or exposure of the surfaces to bromine vapors in the presence and absence of UV irradiation. The three surface modifications explored led to important reductions in biofilm formation for the two marine bacteria, up to 30% in the case of exposure to Br2(g). Biofouling reduction could be correlated to surface properties in all cases through the introduction of a quantitative theoretical model based on an effective roughness parameter, Raeff, that accounted for the different morphological changes observed. The model considers the possibility of bacterial inclusion into large surface wells, as observed by AFM in the case of Br2(g) + UV light treatment. In addition, a linear relationship was observed between biofouling reduction and the Raeff effective roughness parameter.
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Affiliation(s)
- Gonzalo N Cagnola
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales (FCEN), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina
- Instituto de Química Biológica de la FCEN (IQUIBICEN)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), FCEN, UBA, Buenos Aires, Argentina
| | - J Nicolas Cabrera
- Departamento de Química Inorgánica, Analítica y Química Física, FCEN, UBA, Buenos Aires, Argentina
- Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE), CONICET-UBA, Buenos Aires, Argentina
| | - R Martin Negri
- Departamento de Química Inorgánica, Analítica y Química Física, FCEN, UBA, Buenos Aires, Argentina
- Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE), CONICET-UBA, Buenos Aires, Argentina
| | - Norma B D'Accorso
- Departamento de Química Orgánica, FCEN, UBA, Buenos Aires, Argentina
- Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), CONICET-UBA, Buenos Aires, Argentina
| | - Leonardo Lizarraga
- Centro de Investigaciones en Bionanociencias (CIBION-CONICET), Buenos Aires, Argentina
| | - M Julia Pettinari
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales (FCEN), Universidad de Buenos Aires (UBA), Buenos Aires, Argentina.
- Instituto de Química Biológica de la FCEN (IQUIBICEN)-Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), FCEN, UBA, Buenos Aires, Argentina.
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Sousa-Cardoso F, Teixeira-Santos R, Campos AF, Lima M, Gomes LC, Soares OSGP, Mergulhão FJ. Graphene-Based Coating to Mitigate Biofilm Development in Marine Environments. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:381. [PMID: 36770342 PMCID: PMC9919625 DOI: 10.3390/nano13030381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/14/2023] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
Due to its several economic and ecological consequences, biofouling is a widely recognized concern in the marine sector. The search for non-biocide-release antifouling coatings has been on the rise, with carbon-nanocoated surfaces showing promising activity. This work aimed to study the impact of pristine graphene nanoplatelets (GNP) on biofilm development through the representative marine bacteria Cobetia marina and to investigate the antibacterial mechanisms of action of this material. For this purpose, a flow cytometric analysis was performed and a GNP/polydimethylsiloxane (PDMS) surface containing 5 wt% GNP (G5/PDMS) was produced, characterized, and assessed regarding its biofilm mitigation potential over 42 days in controlled hydrodynamic conditions that mimic marine environments. Flow cytometry revealed membrane damage, greater metabolic activity, and endogenous reactive oxygen species (ROS) production by C. marina when exposed to GNP 5% (w/v) for 24 h. In addition, C. marina biofilms formed on G5/PDMS showed consistently lower cell count and thickness (up to 43% reductions) than PDMS. Biofilm architecture analysis indicated that mature biofilms developed on the graphene-based surface had fewer empty spaces (34% reduction) and reduced biovolume (25% reduction) compared to PDMS. Overall, the GNP-based surface inhibited C. marina biofilm development, showing promising potential as a marine antifouling coating.
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Affiliation(s)
- Francisca Sousa-Cardoso
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Rita Teixeira-Santos
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Ana Francisca Campos
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Marta Lima
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Luciana C. Gomes
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Olívia S. G. P. Soares
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- LSRE-LCM—Laboratory of Separation and Reaction Engineering—Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Filipe J. Mergulhão
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
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Ecological Impacts of Aged Freshwater Biofilms on Estuarine Microbial Communities Elucidated Through Microcosm Experiments: A Microbial Invasion Perspective. Curr Microbiol 2022; 79:210. [PMID: 35666311 DOI: 10.1007/s00284-022-02903-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 05/12/2022] [Indexed: 11/03/2022]
Abstract
Inadvertent introductions of alien species via biofilms as a vector released through ballast water are of environmental importance, yet their consequences are not much known. In the present study, biofilm communities developed in an inland freshwater port under in situ and dark conditions were subjected to long-term dark incubations. Subsequently, the impact of these aged biofilms as vectors on estuarine water column communities were evaluated using microcosm experiments in the laboratory. Variations in biofilm and planktonic microbial communities were quantified using quantitative PCR.Upon prolonged dark incubation, a shift in bacterial diversity with an increase in tolerant bacterial communities better adapted to stress was observed. Actinobacteria were the dominant taxa in both aged biofilms upon dark incubations. The laboratory studies indicated that on exposure of these biofilms to estuarine water, resuscitation of Vibrio alginolyticus, V. parahaemolyticus, and V. cholerae from a dormant state existing in these biofilms to culturable form was observed. Moreover, the results revealed that both the biofilm types can pose a threat to the environment, but the degree of risk can be attributed to the imbalance caused by significant changes in the surrounding estuarine microbial communities. Consequently, this may result in either proliferation or decline of some genera with different metabolic potential and resuscitation of pathogenic forms not present earlier, thereby influencing the ecology of the environment. Quantifying these effects in the field using biofilm metagenomes with an emphasis on virulent species and understanding traits that enable them to adapt to changing environments is a way forward.
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Use of Quorum Sensing Inhibition Strategies to Control Microfouling. Mar Drugs 2021; 19:md19020074. [PMID: 33573187 PMCID: PMC7912365 DOI: 10.3390/md19020074] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/21/2021] [Accepted: 01/27/2021] [Indexed: 01/10/2023] Open
Abstract
Interfering with the quorum sensing bacterial communication systems has been proposed as a promising strategy to control bacterial biofilm formation, a key process in biofouling development. Appropriate in vitro biofilm-forming bacteria models are needed to establish screening methods for innovative anti-biofilm and anti-microfouling compounds. Four marine strains, two Pseudoalteromonas spp. and two Vibrio spp., were selected and studied with regard to their biofilm-forming capacity and sensitivity to quorum sensing (QS) inhibitors. Biofilm experiments were performed using two biofilm cultivation and quantification methods: the xCELLigence® system, which allows online monitoring of biofilm formation, and the active attachment model, which allows refreshment of the culture medium to obtain a strong biofilm that can be quantified with standard staining methods. Although all selected strains produced acyl-homoserine-lactone (AHL) QS signals, only the P. flavipulchra biofilm, measured with both quantification systems, was significantly reduced with the addition of the AHL-lactonase Aii20J without a significant effect on planktonic growth. Two-species biofilms containing P. flavipulchra were also affected by the addition of Aii20J, indicating an influence on the target bacterial strain as well as an indirect effect on the co-cultured bacterium. The use of xCELLigence® is proposed as a time-saving method to quantify biofilm formation and search for eco-friendly anti-microfouling compounds based on quorum sensing inhibition (QSI) strategies. The results obtained from these two in vitro biofilm formation methods revealed important differences in the response of biosensor bacteria to culture medium and conditions, indicating that several strains should be used simultaneously for screening purposes and the cultivation conditions should be carefully optimized for each specific purpose.
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Microfluidic accumulation assay to quantify the attachment of the marine bacterium Cobetia marina on fouling-release coatings. Biointerphases 2020; 15:031014. [DOI: 10.1116/6.0000240] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Antifouling Napyradiomycins from Marine-Derived Actinomycetes Streptomyces aculeolatus. Mar Drugs 2020; 18:md18010063. [PMID: 31963732 PMCID: PMC7024211 DOI: 10.3390/md18010063] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 01/14/2020] [Accepted: 01/16/2020] [Indexed: 01/20/2023] Open
Abstract
The undesired attachment of micro and macroorganisms on water-immersed surfaces, known as marine biofouling, results in severe prevention and maintenance costs (billions €/year) for aquaculture, shipping and other industries that rely on coastal and off-shore infrastructures. To date, there are no sustainable, cost-effective and environmentally safe solutions to address this challenging phenomenon. Therefore, we investigated the antifouling activity of napyradiomycin derivatives that were isolated from actinomycetes from ocean sediments collected off the Madeira Archipelago. Our results revealed that napyradiomycins inhibited ≥80% of the marine biofilm-forming bacteria assayed, as well as the settlement of Mytilus galloprovincialis larvae (EC50 < 5 µg/ml and LC50/EC50 >15), without viability impairment. In silico prediction of toxicity end points are of the same order of magnitude of standard approved drugs and biocides. Altogether, napyradiomycins disclosed bioactivity against marine micro and macrofouling organisms, and non-toxic effects towards the studied species, displaying potential to be used in the development of antifouling products.
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Zhang XY, Hao HL, Lau SCK, Wang HY, Han Y, Dong LM, Huang RM. Biodiversity and antifouling activity of fungi associated with two soft corals from the South China Sea. Arch Microbiol 2019; 201:757-767. [PMID: 30840101 DOI: 10.1007/s00203-019-01639-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 02/07/2019] [Accepted: 02/19/2019] [Indexed: 11/28/2022]
Abstract
Bacteria in corals have been studied in detail in the past decades. However, the biodiversity and bioactivity of fungi in corals are still poorly understood. This study investigated the biodiversity and antifouling activity of fungi in soft corals Cladiella krempfi and Sarcophyton tortuosum from the South China Sea. A high diverse and abundant fungal community was found in the two soft corals. Furthermore, five isolates shared 83-95% similarity with their closest relatives, indicating that they might be novel species in genera Phaeoshaeria and Mucor. In addition, approximately 50% of the representative isolates exhibited distinct antifouling activity. In particular, isolates Fungal sp. SCAU132 and Fungal sp. SCAU133 displayed very strong antifouling activity against Bugula neritina, suggesting they can provide a potential resource for further investigation on isolation of novel antifouling metabolites. To our knowledge, this study is the first report to investigate the biodiversity and antifouling activity of fungi in C. krempfi and S. tortuosum.
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Affiliation(s)
- Xiao-Yong Zhang
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bior-esource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, 510642, Guangzhou, China
| | - Hui-Li Hao
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, 510642, Guangzhou, China
| | - Stanley Chun Kwan Lau
- Department of Ocean Science, Hong Kong University of Science and Technology, Clearwater Bay, 999077, Kowloon, Hong Kong, China
| | - Huai-You Wang
- Division of Life Science and Center for Chinese Medicine, Hong Kong University of Science and Technology, Clearwater Bay, 999077, Kowloon, Hong Kong, China
| | - Yu Han
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, 510642, Guangzhou, China
| | - Li-Mei Dong
- College of Forestry and Landscape Architecture, South China Agricultural University, 510642, Guangzhou, China.
| | - Ri-Ming Huang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, 510642, Guangzhou, China.
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Bauermeister A, Pereira F, Grilo IR, Godinho CC, Paulino M, Almeida V, Gobbo‐Neto L, Prieto‐Davó A, Sobral RG, Lopes NP, Gaudêncio SP. Intra‐clade metabolomic profiling of MAR4
Streptomyces
from the Macaronesia Atlantic region reveals a source of anti‐biofilm metabolites. Environ Microbiol 2019; 21:1099-1112. [DOI: 10.1111/1462-2920.14529] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 01/09/2019] [Accepted: 01/09/2019] [Indexed: 12/27/2022]
Affiliation(s)
- Anelize Bauermeister
- NPPNS‐Núcleo de Pesquisa em Produtos Naturais e Sintéticos, Departamento de Física e Química, Faculdade de Ciências Farmacêuticas de Ribeirão PretoUniversidade de São Paulo, Avenida do Café, Monte Alegre 14040‐903 Ribeirão Preto São Paulo Brazil
| | - Florbela Pereira
- LAQV‐REQUIMTE, Departamento de Química, Faculdade de Ciências e TecnologiaUniversidade NOVA de Lisboa 2829‐516 Caparica Portugal
| | - Inês R. Grilo
- UCIBIO‐REQUIMTE, Laboratório de Microbiologia Molecular de Bactérias Patogénicas, Departamento de Ciências da Vida, Faculdade de Ciências e TecnologiaUniversidade NOVA de Lisboa 2829‐516 Caparica Portugal
| | - Camila C. Godinho
- NPPNS‐Núcleo de Pesquisa em Produtos Naturais e Sintéticos, Departamento de Física e Química, Faculdade de Ciências Farmacêuticas de Ribeirão PretoUniversidade de São Paulo, Avenida do Café, Monte Alegre 14040‐903 Ribeirão Preto São Paulo Brazil
| | - Marisa Paulino
- UCIBIO‐REQUIMTE, Laboratório de Biotecnologia Azul e Biomedicina, Departamento de QuímicaFaculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa 2829‐516 Caparica Portugal
| | - Vanessa Almeida
- UCIBIO‐REQUIMTE, Laboratório de Biotecnologia Azul e Biomedicina, Departamento de QuímicaFaculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa 2829‐516 Caparica Portugal
| | - Leonardo Gobbo‐Neto
- NPPNS‐Núcleo de Pesquisa em Produtos Naturais e Sintéticos, Departamento de Física e Química, Faculdade de Ciências Farmacêuticas de Ribeirão PretoUniversidade de São Paulo, Avenida do Café, Monte Alegre 14040‐903 Ribeirão Preto São Paulo Brazil
| | - Alejandra Prieto‐Davó
- Laboratorio de Ecología Microbiana y Productos Naturales MarinosUnidad de Química en Sisal, Facultad de Química, Universidad Nacional Autónoma de México Sisal Yucatán Mexico
| | - Rita G. Sobral
- UCIBIO‐REQUIMTE, Laboratório de Microbiologia Molecular de Bactérias Patogénicas, Departamento de Ciências da Vida, Faculdade de Ciências e TecnologiaUniversidade NOVA de Lisboa 2829‐516 Caparica Portugal
| | - Norberto P. Lopes
- NPPNS‐Núcleo de Pesquisa em Produtos Naturais e Sintéticos, Departamento de Física e Química, Faculdade de Ciências Farmacêuticas de Ribeirão PretoUniversidade de São Paulo, Avenida do Café, Monte Alegre 14040‐903 Ribeirão Preto São Paulo Brazil
| | - Susana P. Gaudêncio
- LAQV‐REQUIMTE, Departamento de Química, Faculdade de Ciências e TecnologiaUniversidade NOVA de Lisboa 2829‐516 Caparica Portugal
- UCIBIO‐REQUIMTE, Laboratório de Biotecnologia Azul e Biomedicina, Departamento de QuímicaFaculdade de Ciências e Tecnologia, Universidade NOVA de Lisboa 2829‐516 Caparica Portugal
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Phylogenetic analysis and antifouling potentials of culturable fungi in mangrove sediments from Techeng Isle, China. World J Microbiol Biotechnol 2018; 34:90. [DOI: 10.1007/s11274-018-2470-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 06/03/2018] [Indexed: 11/26/2022]
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Salta M, Dennington SP, Wharton JA. Biofilm Inhibition by Novel Natural Product- and Biocide-Containing Coatings Using High-Throughput Screening. Int J Mol Sci 2018; 19:ijms19051434. [PMID: 29748514 PMCID: PMC5983801 DOI: 10.3390/ijms19051434] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 05/02/2018] [Accepted: 05/03/2018] [Indexed: 01/31/2023] Open
Abstract
The use of natural products (NPs) as possible alternative biocidal compounds for use in antifouling coatings has been the focus of research over the past decades. Despite the importance of this field, the efficacy of a given NP against biofilm (mainly bacteria and diatoms) formation is tested with the NP being in solution, while almost no studies test the effect of an NP once incorporated into a coating system. The development of a novel bioassay to assess the activity of NP-containing and biocide-containing coatings against marine biofilm formation has been achieved using a high-throughput microplate reader and highly sensitive confocal laser scanning microscopy (CLSM), as well as nucleic acid staining. Juglone, an isolated NP that has previously shown efficacy against bacterial attachment, was incorporated into a simple coating matrix. Biofilm formation over 48 h was assessed and compared against coatings containing the NP and the commonly used booster biocide, cuprous oxide. Leaching of the NP from the coating was quantified at two time points, 24 h and 48 h, showing evidence of both juglone and cuprous oxide being released. Results from the microplate reader showed that the NP coatings exhibited antifouling efficacy, significantly inhibiting biofilm formation when compared to the control coatings, while NP coatings and the cuprous oxide coatings performed equally well. CLSM results and COMSTAT analysis on biofilm 3D morphology showed comparable results when the NP coatings were tested against the controls, with higher biofilm biovolume and maximum thickness being found on the controls. This new method proved to be repeatable and insightful and we believe it is applicable in antifouling and other numerous applications where interactions between biofilm formation and surfaces is of interest.
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Affiliation(s)
- Maria Salta
- Faculty of Sciences, School of Biological Sciences, University of Portsmouth, Portsmouth PO1 2DY, UK.
| | - Simon P Dennington
- Faculty of Engineering and the Environment, National Centre for Advanced Tribology at Southampton (nCATS), University of Southampton, Highfield, Southampton SO17 1BJ, UK.
| | - Julian A Wharton
- Faculty of Engineering and the Environment, National Centre for Advanced Tribology at Southampton (nCATS), University of Southampton, Highfield, Southampton SO17 1BJ, UK.
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Zhang Y, Li C, Fan Y, Wang C, Yang R, Liu X, Zhou L. A self-quenching-resistant carbon nanodot powder with multicolored solid-state fluorescence for ultra-fast staining of various representative bacterial species within one minute. NANOSCALE 2016; 8:19744-19753. [PMID: 27874136 DOI: 10.1039/c6nr06553h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this study, we prepared self-quenching-resistant solid-state fluorescent carbon nanodots (SFCDs) without any other solid matrices. The SFCDs were prepared using a one-step microwave synthesis method through precise control of the heating power and time. The resulting SFCD powder showed excitation-dependent emission behavior with a maximum fluorescence quantum yield of 40%. The multicolored SFCDs were successfully used as fluorescent agents for rapid staining of 14 representative bacterial species, including Gram-negative, Gram-positive, and acid-fast bacteria. Moreover, some pathogenic bacteria, including Bacillus anthracis (vegetative cells and endospores), Yersinia pestis, Vibrio cholera O1, Listeria monocytogenes, Neisseria meningitidis, and Klebsiella pneumoniae, could all be stained within just 1 min by the smear staining method without any incubation, which was also applicable by using the liquid incubation method. Moreover, excellent staining quality, superior resistance to photobleaching, high stability in solutions of different pH values, and low toxicity were also demonstrated.
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Affiliation(s)
- Yongqiang Zhang
- State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China. and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chunfeng Li
- Laboratory of Analytical Microbiology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China. and Department of Clinical Laboratory, Chinese People's Liberation Army General Hospital, Beijing 100853, China and Department of Blood Transfusion, The Second Hospital of Shandong University, Jinan 250033, China
| | - Yi Fan
- State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
| | - Chengbin Wang
- Department of Clinical Laboratory, Chinese People's Liberation Army General Hospital, Beijing 100853, China
| | - Ruifu Yang
- Laboratory of Analytical Microbiology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China.
| | - Xingyuan Liu
- State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
| | - Lei Zhou
- Laboratory of Analytical Microbiology, State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China.
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14
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Flow Chamber System for the Statistical Evaluation of Bacterial Colonization on Materials. MATERIALS 2016; 9:ma9090770. [PMID: 28773891 PMCID: PMC5457037 DOI: 10.3390/ma9090770] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 09/01/2016] [Accepted: 09/02/2016] [Indexed: 11/16/2022]
Abstract
Biofilm formation on materials leads to high costs in industrial processes, as well as in medical applications. This fact has stimulated interest in the development of new materials with improved surfaces to reduce bacterial colonization. Standardized tests relying on statistical evidence are indispensable to evaluate the quality and safety of these new materials. We describe here a flow chamber system for biofilm cultivation under controlled conditions with a total capacity for testing up to 32 samples in parallel. In order to quantify the surface colonization, bacterial cells were DAPI (4`,6-diamidino-2-phenylindole)-stained and examined with epifluorescence microscopy. More than 100 images of each sample were automatically taken and the surface coverage was estimated using the free open source software g’mic, followed by a precise statistical evaluation. Overview images of all gathered pictures were generated to dissect the colonization characteristics of the selected model organism Escherichia coli W3310 on different materials (glass and implant steel). With our approach, differences in bacterial colonization on different materials can be quantified in a statistically validated manner. This reliable test procedure will support the design of improved materials for medical, industrial, and environmental (subaquatic or subaerial) applications.
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15
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Salta M, Capretto L, Carugo D, Wharton JA, Stokes KR. Life under flow: A novel microfluidic device for the assessment of anti-biofilm technologies. BIOMICROFLUIDICS 2013; 7:64118. [PMID: 24454610 PMCID: PMC3888455 DOI: 10.1063/1.4850796] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2013] [Accepted: 12/05/2013] [Indexed: 05/15/2023]
Abstract
In the current study, we have developed and fabricated a novel lab-on-a-chip device for the investigation of biofilm responses, such as attachment kinetics and initial biofilm formation, to different hydrodynamic conditions. The microfluidic flow channels are designed using computational fluid dynamic simulations so as to have a pre-defined, homogeneous wall shear stress in the channels, ranging from 0.03 to 4.30 Pa, which are relevant to in-service conditions on a ship hull, as well as other man-made marine platforms. Temporal variations of biofilm formation in the microfluidic device were assessed using time-lapse microscopy, nucleic acid staining, and confocal laser scanning microscopy (CLSM). Differences in attachment kinetics were observed with increasing shear stress, i.e., with increasing shear stress there appeared to be a delay in bacterial attachment, i.e., at 55, 120, 150, and 155 min for 0.03, 0.60, 2.15, and 4.30 Pa, respectively. CLSM confirmed marked variations in colony architecture, i.e.,: (i) lower shear stresses resulted in biofilms with distinctive morphologies mainly characterised by mushroom-like structures, interstitial channels, and internal voids, and (ii) for the higher shear stresses compact clusters with large interspaces between them were formed. The key advantage of the developed microfluidic device is the combination of three architectural features in one device, i.e., an open-system design, channel replication, and multiple fully developed shear stresses.
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Affiliation(s)
- Maria Salta
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Lorenzo Capretto
- Bioengineering Sciences Group, Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Dario Carugo
- Bioengineering Sciences Group, Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Julian A Wharton
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Keith R Stokes
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom ; Physical Sciences Department, Defence Science and Technology Laboratory (Dstl), Porton Down, Salisbury SP4 0JQ, United Kingdom
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16
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Salta M, Wharton JA, Dennington SP, Stoodley P, Stokes KR. Anti-biofilm performance of three natural products against initial bacterial attachment. Int J Mol Sci 2013; 14:21757-80. [PMID: 24192819 PMCID: PMC3856033 DOI: 10.3390/ijms141121757] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2013] [Revised: 10/13/2013] [Accepted: 10/15/2013] [Indexed: 01/15/2023] Open
Abstract
Marine bacteria contribute significantly towards the fouling consortium, both directly (modern foul release coatings fail to prevent "slime" attachment) and indirectly (biofilms often excrete chemical cues that attract macrofouling settlement). This study assessed the natural product anti-biofilm performance of an extract of the seaweed, Chondrus crispus, and two isolated compounds from terrestrial sources, (+)-usnic acid and juglone, against two marine biofilm forming bacteria, Cobetia marina and Marinobacter hydrocarbonoclasticus. Bioassays were developed using quantitative imaging and fluorescent labelling to test the natural products over a range of concentrations against initial bacterial attachment. All natural products affected bacterial attachment; however, juglone demonstrated the best anti-biofilm performance against both bacterial species at a concentration range between 5-20 ppm. In addition, for the first time, a dose-dependent inhibition (hormetic) response was observed for natural products against marine biofilm forming bacteria.
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Affiliation(s)
- Maria Salta
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, UK; E-Mails: (J.A.W.); (S.P.D.); (P.S.); (K.R.S.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +44-0-2380-593761; Fax: +44-0-2380-5930161
| | - Julian A. Wharton
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, UK; E-Mails: (J.A.W.); (S.P.D.); (P.S.); (K.R.S.)
| | - Simon P. Dennington
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, UK; E-Mails: (J.A.W.); (S.P.D.); (P.S.); (K.R.S.)
| | - Paul Stoodley
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, UK; E-Mails: (J.A.W.); (S.P.D.); (P.S.); (K.R.S.)
| | - Keith R. Stokes
- National Centre for Advanced Tribology at Southampton (nCATS), Engineering Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, UK; E-Mails: (J.A.W.); (S.P.D.); (P.S.); (K.R.S.)
- Physical Sciences Department, the Defence Science and Technology Laboratory, Porton Down, Salisbury, Wiltshire SP4 0JQ, UK
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17
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Shivapooja P, Wang Q, Orihuela B, Rittschof D, López GP, Zhao X. Bioinspired surfaces with dynamic topography for active control of biofouling. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:1430-4. [PMID: 23292960 DOI: 10.1002/adma.201203374] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Indexed: 05/23/2023]
Abstract
Dynamic change of the surface area and topology of elastomers is used as a general, environmentally friendly approach for effectively detaching micro- and macro-fouling organisms adhered on the elastomer surfaces. Deformation of elastomer surfaces under electrical or pneumatic actuation can debond various biofilms and barnacles. The bio-inspired dynamic surfaces can be fabricated over large areas through simple and practical processes. This new mechanism is complementary with existing materials and methods for biofouling control.
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18
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Regina VR, Poulsen M, Søhoel H, Bischoff C, Meyer RL. Quantification of Bacteria on Abiotic Surfaces by Laser Scanning Cytometry. ACTA ACUST UNITED AC 2012; 17:293-301. [DOI: 10.1177/2211068212450013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Microfluidic assay to quantify the adhesion of marine bacteria. Biointerphases 2012; 7:26. [PMID: 22589069 DOI: 10.1007/s13758-012-0026-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Accepted: 02/28/2012] [Indexed: 10/28/2022] Open
Abstract
For both, environmental and medical applications, the quantification of bacterial adhesion is of major importance to understand and support the development of new materials. For marine applications, the demand is driven by the quest for improved fouling-release coatings. To determine the attachment strength of bacteria to coatings, a microfluidic adhesion assay has been developed which allows probing at which critical wall shear stress bacteria are removed from the surface. Besides the experimental setup and the optimization of the assay, we measured adhesion of the marine bacterium Cobetia marina on a series of differently terminated self-assembled monolayers. The results showed that the adhesion strength of C. marina changes with surface chemistry. The difference in critical shear stress needed to remove bacteria can vary by more than one order of magnitude if a hydrophobic material is compared to an inert chemistry such as polyethylene glycol.
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20
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Evariste E, Gachon CMM, Callow ME, Callow JA. Development and characteristics of an adhesion bioassay for ectocarpoid algae. BIOFOULING 2012; 28:15-27. [PMID: 22146003 DOI: 10.1080/08927014.2011.643466] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Species of filamentous brown algae in the family Ectocarpaceae are significant members of fouling communities. However, there are few systematic studies on the influence of surface physico-chemical properties on their adhesion. In the present paper the development of a novel, laboratory-based adhesion bioassay for ectocarpoid algae, at an appropriate scale for the screening of sets of experimental samples in well-replicated and controlled experiments is described. The assays are based on the colonization of surfaces from a starting inoculum consisting of multicellular filaments obtained by blending the cultured alga Ectocarpus crouaniorum. The adhesion strength of the biomass after 14 days growth was assessed by applying a hydrodynamic shear stress. Results from adhesion tests on a set of standard surfaces showed that E. crouaniorum adhered more weakly to the amphiphilic Intersleek® 900 than to the more hydrophobic Intersleek® 700 and Silastic® T2 coatings. Adhesion to hydrophilic glass was also weak. Similar results were obtained for other cultivated species of Ectocarpus but differed from those obtained with the related ectocarpoid species Hincksia secunda. The response of the ectocarpoid algae to the surfaces was also compared to that for the green alga, Ulva.
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21
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Ederth T, Ekblad T, Pettitt ME, Conlan SL, Du CX, Callow ME, Callow JA, Mutton R, Clare AS, D'Souza F, Donnelly G, Bruin A, Willemsen PR, Su XJ, Wang S, Zhao Q, Hederos M, Konradsson P, Liedberg B. Resistance of galactoside-terminated alkanethiol self-assembled monolayers to marine fouling organisms. ACS APPLIED MATERIALS & INTERFACES 2011; 3:3890-3901. [PMID: 21916438 DOI: 10.1021/am200726a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Self-assembled monolayers (SAMs) of galactoside-terminated alkanethiols have protein-resistance properties which can be tuned via the degree of methylation [Langmuir 2005, 21, 2971-2980]. Specifically, a partially methylated compound was more resistant to nonspecific protein adsorption than the hydroxylated or fully methylated counterparts. We investigate whether this also holds true for resistance to the attachment and adhesion of a range of marine species, in order to clarify to what extent resistance to protein adsorption correlates with the more complex adhesion of fouling organisms. The partially methylated galactoside-terminated SAM was further compared to a mixed monolayer of ω-substituted methyl- and hydroxyl-terminated alkanethiols with wetting properties and surface ratio of hydroxyl to methyl groups matching that of the galactoside. The settlement (initial attachment) and adhesion strength of four model marine fouling organisms were investigated, representing both micro- and macrofoulers; two bacteria (Cobetia marina and Marinobacter hydrocarbonoclasticus), barnacle cypris larvae (Balanus amphitrite), and algal zoospores (Ulva linza). The minimum in protein adsorption onto the partially methylated galactoside surface was partly reproduced in the marine fouling assays, providing some support for a relationship between protein resistance and adhesion of marine fouling organisms. The mixed alkanethiol SAM, which was matched in wettability to the partially methylated galactoside SAM, consistently showed higher settlement (initial attachment) of test organisms than the galactoside, implying that both wettability and surface chemistry are insufficient to explain differences in fouling resistance. We suggest that differences in the structure of interfacial water may explain the variation in adhesion to these SAMs.
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Affiliation(s)
- Thomas Ederth
- Division of Molecular Physics, IFM, Linköping University, SE-581 83 Linköping, Sweden.
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22
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Liu C, Zhao Q. Influence of surface-energy components of Ni-P-TiO2-PTFE nanocomposite coatings on bacterial adhesion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:9512-9519. [PMID: 21675718 DOI: 10.1021/la200910f] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The influence of total surface energy on bacterial adhesion has been investigated intensively with the frequent conclusion that bacterial adhesion is less on low-energy surfaces. However, there are also a number of contrary findings that high-energy surfaces have a smaller biofouling tendency. Recently, it was found that the CQ ratio, which is defined as the ratio of Lifshitz-van der Waals (LW) apolar to electron donor surface-energy components of substrates, has a strong correlation to bacterial adhesion. However, the electron donor surface-energy components of substrates varied over only a very limited range. In this article, a series of Ni-P-TiO(2)-PTFE nanocomposite coatings with wide range of surface-energy components were prepared using an electroless plating technique. The bacterial adhesion and removal on the coatings were evaluated with different bacteria under both static and flow conditions. The experimental results demonstrated that there was a strong correlation between bacterial attachment (or removal) and the CQ ratio. The coatings with the lowest CQ ratio had the lowest bacterial adhesion or the highest bacterial removal, which was explained using the extented DLVO theory.
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Affiliation(s)
- Chen Liu
- Department of Mechanical Engineering, University of Dundee, Dundee DD1 4HN, UK
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Camps M, Briand JF, Guentas-Dombrowsky L, Culioli G, Bazire A, Blache Y. Antifouling activity of commercial biocides vs. natural and natural-derived products assessed by marine bacteria adhesion bioassay. MARINE POLLUTION BULLETIN 2011; 62:1032-1040. [PMID: 21414639 DOI: 10.1016/j.marpolbul.2011.02.031] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 02/15/2011] [Accepted: 02/18/2011] [Indexed: 05/30/2023]
Abstract
Biofilm formation is a key step during marine biofouling, the natural colonization of immersed substrata, leading to major economic and ecological consequences. Consequently, bacteria have been used for the screening of new non-toxic antifoulants: the adhesion of five strains isolated on three French locations was monitored using a fluorescence-based assay and toxicity was also evaluated. Nine biocides including commercial, natural and natural-derived products were tested. The commercial antifoulants, TBTO and Sea Nine showed low EC(50) but high toxicity. The non-commercial products TFA-Z showed significant anti-adhesion activities and appeared to be non-toxic, suggesting a specific anti-adhesion mechanism. In addition, the strains could be classified depending on their sensitivity to the molecules used even if strain sensitivity also depended on the molecules tested. In conclusion, TFA-Z would be a promising candidate as non-toxic antifoulant and our results strengthen the need to perform antifouling bioassays with a panel of strains showing different response profiles.
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Affiliation(s)
- Mercedes Camps
- Laboratoire MAPIEM, EA 4323, Biofouling et Substances Naturelles Marines, Université du Sud Toulon-Var, 83162 La Valette-du-Var, France
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Liu C, Zhao Q. The CQ ratio of surface energy components influences adhesion and removal of fouling bacteria. BIOFOULING 2011; 27:275-285. [PMID: 21390912 DOI: 10.1080/08927014.2011.563842] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The interaction energy between bacteria and substrata with different surface energies was modelled by the extended DLVO (Derjaguin, Landau, Verwey and Overbeek) theory. The modeling results revealed that the interaction energy has a strong correlation with the CQ (Chen and Qi) ratio, which is defined as the ratio of the Lifshitz-van der Waals (LW) apolar to the electron donor surface energy components of substrata. Both modeling and experimental results with different bacteria including P. fluorescens, Cobetia marina and Vibrio alginolyticus demonstrated that if the LW surface energy of bacteria is larger than that of water, which is the case for most bacteria, the number of adhered bacteria decreases with a decreasing CQ ratio while bacterial removal rate increases with a decreasing CQ ratio. However, if the LW surface energy of bacteria is less than that of water, the opposite results are obtained. The CQ ratio gives a clear direction for the design of anti-biofouling and biofouling-release coatings through surface modification.
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Affiliation(s)
- Chen Liu
- Department of Mechanical Engineering, University of Dundee, UK
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