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Ratia C, Ballén V, Gabasa Y, Soengas RG, Velasco-de Andrés M, Iglesias MJ, Cheng Q, Lozano F, Arnér ESJ, López-Ortiz F, Soto SM. Novel gold(III)-dithiocarbamate complex targeting bacterial thioredoxin reductase: antimicrobial activity, synergy, toxicity, and mechanistic insights. Front Microbiol 2023; 14:1198473. [PMID: 37333656 PMCID: PMC10272563 DOI: 10.3389/fmicb.2023.1198473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Accepted: 05/15/2023] [Indexed: 06/20/2023] Open
Abstract
Introduction Antimicrobial resistance is a pressing global concern that has led to the search for new antibacterial agents with novel targets or non-traditional approaches. Recently, organogold compounds have emerged as a promising class of antibacterial agents. In this study, we present and characterize a (C^S)-cyclometallated Au(III) dithiocarbamate complex as a potential drug candidate. Methods and results The Au(III) complex was found to be stable in the presence of effective biological reductants, and showed potent antibacterial and antibiofilm activity against a wide range of multidrug-resistant strains, particularly gram-positive strains, and gram-negative strains when used in combination with a permeabilizing antibiotic. No resistant mutants were detected after exposing bacterial cultures to strong selective pressure, indicating that the complex may have a low propensity for resistance development. Mechanistic studies indicate that the Au(III) complex exerts its antibacterial activity through a multimodal mechanism of action. Ultrastructural membrane damage and rapid bacterial uptake suggest direct interactions with the bacterial membrane, while transcriptomic analysis identified altered pathways related to energy metabolism and membrane stability including enzymes of the TCA cycle and fatty acid biosynthesis. Enzymatic studies further revealed a strong reversible inhibition of the bacterial thioredoxin reductase. Importantly, the Au(III) complex demonstrated low cytotoxicity at therapeutic concentrations in mammalian cell lines, and showed no acute in vivo toxicity in mice at the doses tested, with no signs of organ toxicity. Discussion Overall, these findings highlight the potential of the Au(III)-dithiocarbamate scaffold as a basis for developing novel antimicrobial agents, given its potent antibacterial activity, synergy, redox stability, inability to produce resistant mutants, low toxicity to mammalian cells both in vitro and in vivo, and non-conventional mechanism of action.
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Affiliation(s)
- Carlos Ratia
- Barcelona Institute for Global Health (ISGlobal), Universitat de Barcelona, Barcelona, Spain
| | - Victoria Ballén
- Barcelona Institute for Global Health (ISGlobal), Universitat de Barcelona, Barcelona, Spain
| | - Yaiza Gabasa
- Barcelona Institute for Global Health (ISGlobal), Universitat de Barcelona, Barcelona, Spain
| | - Raquel G. Soengas
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, Almería, Spain
| | | | - María José Iglesias
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, Almería, Spain
| | - Qing Cheng
- Division of Biochemistry, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Francisco Lozano
- August Pi i Sunyer Biomedical Research Institute (IDIBAPS), Barcelona, Spain
- Servei d’Immunologia, Centre de Diagnòstic Biomèdic, Hospital Clínic de Barcelona, Barcelona, Spain
- Department de Biomedicina, Facultat de Medicina, Universitat de Barcelona, Barcelona, Spain
| | - Elias S. J. Arnér
- Division of Biochemistry, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
- Department of Selenoprotein Research and the National Tumor Biology Laboratory, Budapest, Hungary
| | - Fernando López-Ortiz
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, Almería, Spain
| | - Sara M. Soto
- Barcelona Institute for Global Health (ISGlobal), Universitat de Barcelona, Barcelona, Spain
- CIBER Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain
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Iglesias MJ, Soengas R, López-Ortiz F, Biondi N, Tredici MR, Gutiérrez-Del-Río I, López-Ibáñez S, Villar CJ, Lombó F, López Y, Gabasa Y, Soto S. Effect of culture conditions at lab-scale on metabolite composition and antibacterial and antibiofilm activities of Dunaliella tertiolecta. J Phycol 2023; 59:356-369. [PMID: 36690599 DOI: 10.1111/jpy.13316] [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] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 12/02/2022] [Accepted: 12/19/2022] [Indexed: 05/28/2023]
Abstract
Dunaliella tertiolecta RCC6 was cultivated indoors in glass bubble column photobioreactors operated under batch and semi-continuous regimens and using two different conditions of light and temperature. Biomass was harvested by centrifugation, frozen, and then lyophilized. The soluble material was obtained by sequential extraction of the lyophilized biomass with solvents with a gradient of polarity (hexane, ethyl acetate, and methanol) and its metabolic composition was investigated through nuclear magnetic resonance (NMR) spectroscopy. The effect of light on chlorophyll biosynthesis was clearly shown through the relative intensities of the 1 H NMR signals due to pheophytins. The highest signal intensity was observed for the biomasses obtained at lower light intensity, resulting in a lower light availability per cell. Under high temperature and light conditions, the 1 H NMR spectra of the hexane extracts showed an incipient accumulation of triacylglycerols. In these conditions and under semi-continuous regimen, an enhancement of β-carotene and sterols production was observed. The antibacterial and antibiofilm activities of the extracts were also tested. Antibacterial activity was not detected, regardless of culture conditions. In contrast, the minimal biofilm inhibitory concentrations (MBICs) against Escherichia coli for the hexane extract obtained under semi-continuous regimen using high temperature and irradiance conditions was promising.
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Affiliation(s)
- María José Iglesias
- Área de Química Orgánica, Research Centre CIAIMBITAL, Universidad de Almería, Almería, Spain
| | - Raquel Soengas
- Área de Química Orgánica, Research Centre CIAIMBITAL, Universidad de Almería, Almería, Spain
| | - Fernando López-Ortiz
- Área de Química Orgánica, Research Centre CIAIMBITAL, Universidad de Almería, Almería, Spain
| | - Natascia Biondi
- Department of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Florence, Italy
| | - Mario R Tredici
- Department of Agriculture, Food, Environment and Forestry (DAGRI), University of Florence, Florence, Italy
| | - Ignacio Gutiérrez-Del-Río
- Área de Microbiología, Research Group BIONUC, Universidad de Oviedo, IUOPA (Instituto Universitario de Oncología del Principado de Asturias), ISPA (Instituto de Investigación Sanitaria del Principado de Asturias), Oviedo, Spain
| | - Sara López-Ibáñez
- Área de Microbiología, Research Group BIONUC, Universidad de Oviedo, IUOPA (Instituto Universitario de Oncología del Principado de Asturias), ISPA (Instituto de Investigación Sanitaria del Principado de Asturias), Oviedo, Spain
| | - Claudio J Villar
- Área de Microbiología, Research Group BIONUC, Universidad de Oviedo, IUOPA (Instituto Universitario de Oncología del Principado de Asturias), ISPA (Instituto de Investigación Sanitaria del Principado de Asturias), Oviedo, Spain
| | - Felipe Lombó
- Área de Microbiología, Research Group BIONUC, Universidad de Oviedo, IUOPA (Instituto Universitario de Oncología del Principado de Asturias), ISPA (Instituto de Investigación Sanitaria del Principado de Asturias), Oviedo, Spain
| | - Yuly López
- ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain
| | - Yaiza Gabasa
- ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain
| | - Sara Soto
- ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain
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Jensen N, Jensen HE, Aalbaek B, Blirup-Plum SA, Soto SM, Cepas V, López Y, Gabasa Y, Gutiérrez-del-Río I, Villar CJ, Lombó F, Iglesias MJ, Soengas R, López Ortiz F, Jensen LK. Synthesis of the cyanobacterial halometabolite Chlorosphaerolactylate B and demonstration of its antimicrobial effect in vitro and in vivo. Front Microbiol 2022; 13:950855. [PMID: 36246241 PMCID: PMC9557163 DOI: 10.3389/fmicb.2022.950855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 08/18/2022] [Indexed: 12/02/2022] Open
Abstract
Chlorosphaerolactylate B, a newly discovered antimicrobial halometabolite from the cyanobacterium Sphaerospermopsis sp. LEGE 00249 has been synthesized in three steps by using 12-bromododecanoic acid as starting material. A total of 0.5 g was produced for in vitro and in vivo antimicrobial efficacy testing. In vitro, the minimal inhibitory concentration (MIC) was estimated to be 256 mg/L for Staphylococcus aureus, while the minimal biofilm inhibitory concentration (MBIC) was estimated to be 74 mg/L. The in vivo study utilized a porcine model of implant-associated osteomyelitis. In total, 12 female pigs were allocated into 3 groups based on inoculum (n = 4 in each group). An implant cavity (IC) was drilled in the right tibia and followed by inoculation and insertion of a steel implant. All pigs were inoculated with 10 μL containing either: 11.79 mg synthetic Chlorosphaerolactylate B + 104 CFU of S. aureus (Group A), 104 CFU of S. aureus (Group B), or pure saline (Group C), respectively. Pigs were euthanized five days after inoculation. All Group B animals showed macroscopic and microscopic signs of bone infection and both tissue and implant harbored S. aureus bacteria (mean CFU on implants = 1.9 × 105). In contrast, S. aureus could not be isolated from animals inoculated with saline. In Group A, two animals had a low number of S. aureus (CFU = 6.7 × 101 and 3.8 × 101, respectively) on the implants, otherwise all Group A animals were similar to Group C animals. In conclusion, synthetic Chlorosphaerolactylate B holds potential to be a novel antimicrobial and antibiofilm compound.
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Affiliation(s)
- Nikoline Jensen
- Section for Pathobiological Sciences, Department of Veterinary and Animal Science, University of Copenhagen, Copenhagen, Denmark
| | - Henrik Elvang Jensen
- Section for Pathobiological Sciences, Department of Veterinary and Animal Science, University of Copenhagen, Copenhagen, Denmark
| | - Bent Aalbaek
- Section for Pathobiological Sciences, Department of Veterinary and Animal Science, University of Copenhagen, Copenhagen, Denmark
| | - Sophie Amalie Blirup-Plum
- Section for Pathobiological Sciences, Department of Veterinary and Animal Science, University of Copenhagen, Copenhagen, Denmark
| | - Sara M. Soto
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
- CIBER Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, Madrid, Spain
| | - Virginio Cepas
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
| | - Yuly López
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
| | - Yaiza Gabasa
- ISGlobal, Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
| | - Ignacio Gutiérrez-del-Río
- Biotechnology in Nutraceuticals and Bioactive Compounds-BIONUC, Department of Functional Biology, University of Oviedo, Oviedo, Spain
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
| | - Claudio J. Villar
- Biotechnology in Nutraceuticals and Bioactive Compounds-BIONUC, Department of Functional Biology, University of Oviedo, Oviedo, Spain
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
| | - Felipe Lombó
- Biotechnology in Nutraceuticals and Bioactive Compounds-BIONUC, Department of Functional Biology, University of Oviedo, Oviedo, Spain
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
| | - María José Iglesias
- Instituto Universitario de Oncología del Principado de Asturias (IUOPA), Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Oviedo, Spain
| | - Raquel Soengas
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, Almería, Spain
| | - Fernando López Ortiz
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, Almería, Spain
- *Correspondence: Fernando López Ortiz,
| | - Louise Kruse Jensen
- Section for Pathobiological Sciences, Department of Veterinary and Animal Science, University of Copenhagen, Copenhagen, Denmark
- Louise Kruse Jensen,
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Veloso M, Lopez Y, Bernaus M, Gabasa Y, Angles F, Font-Vizcarra L, Soto S. "In vitro" evaluation of bacterial biofilm formation on different cerclage systems. J Biomater Appl 2022; 37:767-772. [PMID: 35924755 DOI: 10.1177/08853282221117059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Cerclage wiring may be used for fracture fixation or osteotomy stabilization in revision arthroplasty. There is a lack of evidence regarding the potential risk of bacterial colonization for the different types of cerclages. The objective of our research is to study the adhesion and biofilm formation of S. epidermidis, S. aureus, and P. aeruginosa on two different cerclage cable models, comparing a polymer cable and a stainless steel metal cable. A two-cm cerclage piece of each material was submerged in 2 mL of tryptic soy broth (TSB) inoculated with 10 μL of a 0.5 McFarland bacterial culture, and incubated at 37°C during 2 h for adhesion and 48 h for biofilm formation. The cerclages were washed with 1xPBS and sonicated in a new culture medium. Aliquots of several dilutions of each sonicated culture were spread in TSB agar and incubated at 37°C for 24 h. The number of colonies was counted. The colony-forming units per ml (CFU/mL) and the percentage of reduction were calculated. Experiments were triplicated. For P. aeruginosa, a statistically significant reduction in biofilm formation was found on the polymer cerclage cable, compared to the metal cerclage cable. Reductions of 59% and 88%, after 2 h and 48 h, respectively, were observed. For S. epidermis and S. aureus, there was a trend towards lower bacterial adhesion and biofilm formation for the polymer cerclage cable. In summary, these results demonstrate that the braided polymer cerclage cable may be less prone to bacterial adherence and biofilm formation compared to the braided metal cerclage cable.
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Affiliation(s)
| | | | - Martí Bernaus
- 58955Hospital Universitari MutuaTerrassa, Terrassa, Spain
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Ballén V, Cepas V, Ratia C, Gabasa Y, Soto SM. Clinical Escherichia coli: From Biofilm Formation to New Antibiofilm Strategies. Microorganisms 2022; 10:microorganisms10061103. [PMID: 35744621 PMCID: PMC9229135 DOI: 10.3390/microorganisms10061103] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 05/23/2022] [Accepted: 05/24/2022] [Indexed: 02/05/2023] Open
Abstract
Escherichia coli is one of the species most frequently involved in biofilm-related diseases, being especially important in urinary tract infections, causing relapses or chronic infections. Compared to their planktonic analogues, biofilms confer to the bacteria the capacity to be up to 1000-fold more resistant to antibiotics and to evade the action of the host’s immune system. For this reason, biofilm-related infections are very difficult to treat. To develop new strategies against biofilms, it is important to know the mechanisms involved in their formation. In this review, the different steps of biofilm formation in E. coli, the mechanisms of tolerance to antimicrobials and new compounds and strategies to combat biofilms are discussed.
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Affiliation(s)
- Victoria Ballén
- ISGlobal, Hospital Clínic, Universitat de Barcelona, 08036 Barcelona, Spain; (V.B.); (V.C.); (C.R.); (Y.G.)
| | - Virginio Cepas
- ISGlobal, Hospital Clínic, Universitat de Barcelona, 08036 Barcelona, Spain; (V.B.); (V.C.); (C.R.); (Y.G.)
| | - Carlos Ratia
- ISGlobal, Hospital Clínic, Universitat de Barcelona, 08036 Barcelona, Spain; (V.B.); (V.C.); (C.R.); (Y.G.)
| | - Yaiza Gabasa
- ISGlobal, Hospital Clínic, Universitat de Barcelona, 08036 Barcelona, Spain; (V.B.); (V.C.); (C.R.); (Y.G.)
| | - Sara M. Soto
- ISGlobal, Hospital Clínic, Universitat de Barcelona, 08036 Barcelona, Spain; (V.B.); (V.C.); (C.R.); (Y.G.)
- CIBER Enfermedades Infecciosas (CIBERINFEC), Instituto de Salud Carlos III, 28029 Madrid, Spain
- Correspondence:
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Ballén V, Gabasa Y, Ratia C, Sánchez M, Soto S. Correlation Between Antimicrobial Resistance, Virulence Determinants and Biofilm Formation Ability Among Extraintestinal Pathogenic Escherichia coli Strains Isolated in Catalonia, Spain. Front Microbiol 2022; 12:803862. [PMID: 35087504 PMCID: PMC8786794 DOI: 10.3389/fmicb.2021.803862] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 12/09/2021] [Indexed: 01/29/2023] Open
Abstract
Escherichia coli is a well-characterized bacterium highly prevalent in the human intestinal tract and the cause of many important infections. The aim of this study was to characterize 376 extraintestinal pathogenic E. coli strains collected from four hospitals in Catalonia (Spain) between 2016 and 2017 in terms of antimicrobial resistance, siderophore production, phylogroup classification, and the presence of selected virulence and antimicrobial resistance genes. In addition, the association between these characteristics and the ability to form biofilms was also analyzed. The strains studied were classified into four groups according to their biofilm formation ability: non-biofilm formers (15.7%), weak (23.1%), moderate (35.6%), and strong biofilm formers (25.6%). The strains were highly resistant to ciprofloxacin (48.7%), trimethoprim-sulfamethoxazole (47.9%), and ampicillin (38%), showing a correlation between higher resistance to ciprofloxacin and lower biofilm production. Seventy-three strains (19.4%) were ESBL-producers. However, no relationship between the presence of ESBL and biofilm formation was found. The virulence factor genes fimH (92%), pgaA (84.6%), and irp1 (77.1%) were the most prevalent in all the studied strains. A statistically significant correlation was found between biofilm formation and the presence of iroN, papA, fimH, sfa, cnf, hlyA, iutA, and colibactin-encoding genes clbA, clbB, clbN, and clbQ. Interestingly, a high prevalence of colibactin-encoding genes (19.9%) was observed. Colibactin is a virulence factor, which interferes with the eukaryotic cell cycle and has been associated with colorectal cancer in humans. Most colibactin-encoding E. coli isolates belonged to phylogroup B2, exhibited low antimicrobial resistance but moderate or high biofilm-forming ability, and were significantly associated with most of the virulence factor genes tested. Additionally, the analysis of their clonal relatedness by PFGE showed 48 different clusters, indicating a high clonal diversity among the colibactin-positive strains. Several studies have correlated the pathogenicity of E. coli and the presence of virulence factor genes; however, colibactin and its relationship to biofilm formation have been scarcely investigated. The increasing prevalence of colibactin in E. coli and other Enterobacteriaceae and the recently described correlation with biofilm formation, makes colibactin a promising therapeutic target to prevent biofilm formation and its associated adverse effects.
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Affiliation(s)
- Victoria Ballén
- ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain
| | - Yaiza Gabasa
- ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain
| | - Carlos Ratia
- ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain
| | - Melany Sánchez
- ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain
| | - Sara Soto
- ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain
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Cepas V, Gutiérrez-Del-Río I, López Y, Redondo-Blanco S, Gabasa Y, Iglesias MJ, Soengas R, Fernández-Lorenzo A, López-Ibáñez S, Villar CJ, Martins CB, Ferreira JD, Assunção MFG, Santos LMA, Morais J, Castelo-Branco R, Reis MA, Vasconcelos V, López-Ortiz F, Lombó F, Soto SM. Microalgae and Cyanobacteria Strains as Producers of Lipids with Antibacterial and Antibiofilm Activity. Mar Drugs 2021; 19:md19120675. [PMID: 34940674 PMCID: PMC8709229 DOI: 10.3390/md19120675] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/19/2021] [Accepted: 11/25/2021] [Indexed: 12/16/2022] Open
Abstract
Lipids are one of the primary metabolites of microalgae and cyanobacteria, which enrich their utility in the pharmaceutical, feed, cosmetic, and chemistry sectors. This work describes the isolation, structural elucidation, and the antibiotic and antibiofilm activities of diverse lipids produced by different microalgae and cyanobacteria strains from two European collections (ACOI and LEGE-CC). Three microalgae strains and one cyanobacteria strain were selected for their antibacterial and/or antibiofilm activity after the screening of about 600 strains carried out under the NoMorFilm European project. The total organic extracts were firstly fractionated using solid phase extraction methods, and the minimum inhibitory concentration and minimal biofilm inhibitory concentration against an array of human pathogens were determined. The isolation was carried out by bioassay-guided HPLC-DAD purification, and the structure of the isolated molecules responsible for the observed activities was determined by HPLC-HRESIMS and NMR methods. Sulfoquinovosyldiacylglycerol, monogalactosylmonoacylglycerol, sulfoquinovosylmonoacylglycerol, α-linolenic acid, hexadeca-4,7,10,13-tetraenoic acid (HDTA), palmitoleic acid, and lysophosphatidylcholine were found among the different active sub-fractions selected. In conclusion, cyanobacteria and microalgae produce a great variety of lipids with antibiotic and antibiofilm activity against the most important pathogens causing severe infections in humans. The use of these lipids in clinical treatments alone or in combination with antibiotics may provide an alternative to the current treatments.
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Affiliation(s)
- Virginio Cepas
- ISGlobal, Hospital Clínic—Universitat de Barcelona, 08036 Barcelona, Spain; (V.C.); (Y.L.); (Y.G.)
| | - Ignacio Gutiérrez-Del-Río
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, Universidad de Oviedo, 33006 Oviedo, Spain; (I.G.-D.-R.); (S.R.-B.); (A.F.-L.); (S.L.-I.); (C.J.V.); (F.L.)
- IUOPA (Instituto Universitario de Oncología del Principado de Asturias), Principality of Asturias, 33006 Oviedo, Spain
- ISPA (Instituto de Investigaciones Sanitarias del Principado de Asturias), Principality of Asturias, 33011 Oviedo, Spain
| | - Yuly López
- ISGlobal, Hospital Clínic—Universitat de Barcelona, 08036 Barcelona, Spain; (V.C.); (Y.L.); (Y.G.)
| | - Saúl Redondo-Blanco
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, Universidad de Oviedo, 33006 Oviedo, Spain; (I.G.-D.-R.); (S.R.-B.); (A.F.-L.); (S.L.-I.); (C.J.V.); (F.L.)
- IUOPA (Instituto Universitario de Oncología del Principado de Asturias), Principality of Asturias, 33006 Oviedo, Spain
- ISPA (Instituto de Investigaciones Sanitarias del Principado de Asturias), Principality of Asturias, 33011 Oviedo, Spain
| | - Yaiza Gabasa
- ISGlobal, Hospital Clínic—Universitat de Barcelona, 08036 Barcelona, Spain; (V.C.); (Y.L.); (Y.G.)
| | - María José Iglesias
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, 04120 Almería, Spain; (M.J.I.); (R.S.); (F.L.-O.)
| | - Raquel Soengas
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, 04120 Almería, Spain; (M.J.I.); (R.S.); (F.L.-O.)
| | - Andrés Fernández-Lorenzo
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, Universidad de Oviedo, 33006 Oviedo, Spain; (I.G.-D.-R.); (S.R.-B.); (A.F.-L.); (S.L.-I.); (C.J.V.); (F.L.)
- IUOPA (Instituto Universitario de Oncología del Principado de Asturias), Principality of Asturias, 33006 Oviedo, Spain
- ISPA (Instituto de Investigaciones Sanitarias del Principado de Asturias), Principality of Asturias, 33011 Oviedo, Spain
| | - Sara López-Ibáñez
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, Universidad de Oviedo, 33006 Oviedo, Spain; (I.G.-D.-R.); (S.R.-B.); (A.F.-L.); (S.L.-I.); (C.J.V.); (F.L.)
- IUOPA (Instituto Universitario de Oncología del Principado de Asturias), Principality of Asturias, 33006 Oviedo, Spain
- ISPA (Instituto de Investigaciones Sanitarias del Principado de Asturias), Principality of Asturias, 33011 Oviedo, Spain
| | - Claudio J. Villar
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, Universidad de Oviedo, 33006 Oviedo, Spain; (I.G.-D.-R.); (S.R.-B.); (A.F.-L.); (S.L.-I.); (C.J.V.); (F.L.)
- IUOPA (Instituto Universitario de Oncología del Principado de Asturias), Principality of Asturias, 33006 Oviedo, Spain
- ISPA (Instituto de Investigaciones Sanitarias del Principado de Asturias), Principality of Asturias, 33011 Oviedo, Spain
| | - Clara B. Martins
- Coimbra Collection of Algae (ACOI), Department of Life Sciences, Calçada Martim de Freitas, University of Coimbra, 3000-456 Coimbra, Portugal; (C.B.M.); (J.D.F.); (M.F.G.A.); (L.M.A.S.)
- “Molecular Physical-Chemistry” R&D Unit, Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
| | - Joana D. Ferreira
- Coimbra Collection of Algae (ACOI), Department of Life Sciences, Calçada Martim de Freitas, University of Coimbra, 3000-456 Coimbra, Portugal; (C.B.M.); (J.D.F.); (M.F.G.A.); (L.M.A.S.)
| | - Mariana F. G. Assunção
- Coimbra Collection of Algae (ACOI), Department of Life Sciences, Calçada Martim de Freitas, University of Coimbra, 3000-456 Coimbra, Portugal; (C.B.M.); (J.D.F.); (M.F.G.A.); (L.M.A.S.)
| | - Lília M. A. Santos
- Coimbra Collection of Algae (ACOI), Department of Life Sciences, Calçada Martim de Freitas, University of Coimbra, 3000-456 Coimbra, Portugal; (C.B.M.); (J.D.F.); (M.F.G.A.); (L.M.A.S.)
| | - João Morais
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal; (J.M.); (R.C.-B.); (M.A.R.); (V.V.)
| | - Raquel Castelo-Branco
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal; (J.M.); (R.C.-B.); (M.A.R.); (V.V.)
| | - Mariana A. Reis
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal; (J.M.); (R.C.-B.); (M.A.R.); (V.V.)
| | - Vitor Vasconcelos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Terminal de Cruzeiros do Porto de Leixões, University of Porto, 4450-208 Matosinhos, Portugal; (J.M.); (R.C.-B.); (M.A.R.); (V.V.)
- Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, Edifício FC4, 4169-007 Porto, Portugal
| | - Fernando López-Ortiz
- Área de Química Orgánica, Centro de Investigación CIAIMBITAL, Universidad de Almería, 04120 Almería, Spain; (M.J.I.); (R.S.); (F.L.-O.)
| | - Felipe Lombó
- Research Group BIONUC (Biotechnology of Nutraceuticals and Bioactive Compounds), Departamento de Biología Funcional, Área de Microbiología, Universidad de Oviedo, 33006 Oviedo, Spain; (I.G.-D.-R.); (S.R.-B.); (A.F.-L.); (S.L.-I.); (C.J.V.); (F.L.)
- IUOPA (Instituto Universitario de Oncología del Principado de Asturias), Principality of Asturias, 33006 Oviedo, Spain
- ISPA (Instituto de Investigaciones Sanitarias del Principado de Asturias), Principality of Asturias, 33011 Oviedo, Spain
| | - Sara M. Soto
- ISGlobal, Hospital Clínic—Universitat de Barcelona, 08036 Barcelona, Spain; (V.C.); (Y.L.); (Y.G.)
- Correspondence: ; Tel.: +34-932275400
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Ballén V, Gabasa Y, Ratia C, Ortega R, Tejero M, Soto S. Antibiotic Resistance and Virulence Profiles of Klebsiella pneumoniae Strains Isolated From Different Clinical Sources. Front Cell Infect Microbiol 2021; 11:738223. [PMID: 34540722 PMCID: PMC8440954 DOI: 10.3389/fcimb.2021.738223] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 08/16/2021] [Indexed: 11/26/2022] Open
Abstract
Klebsiella pneumoniae is a Gram-negative bacterium capable of colonizing, invading, and causing infections in different anatomical sites of the human body. Its ability to evade the immune system, its increasing antimicrobial resistance and the emergence of hypervirulent pathotypes have become a major challenge in the medical field. In this study, 127 strains from different clinical sources (urine, respiratory tract or blood) were characterized for antimicrobial resistance, the presence of virulence factor genes, serum resistance, hypermucoviscosity and the ability to form biofilms. Specific characteristics of the uropathogenic strains were examined and compared with the other clinical groups. Differences were found between urine and the other groups of strains. Urine strains showed the highest antibiotic resistance (64.91%) compared to blood (63.64%) or respiratory strains (51.35%) as well as the highest extended-spectrum beta-lactamases (ESBL) production. These strains also showed statistically significant high resistance to fosfomycin (24.56%) compared to the other groups (p = 0.008). Regarding virulence, 84.21% of the urine strains presented the uge gene, showing a statistically significant difference (p = 0.03) compared to the other clinical sources, indicating a possible role of this gene in the development of urinary tract infection. In addition, 46% of biofilm-forming strains belonged to the urine sample group (p = 0.043). In conclusion, K. pneumoniae strains isolated from urine samples showed higher antimicrobial resistance, ESBL production, and biofilm-forming ability compared to those isolated from respiratory or blood samples. The rapid spread of clinical strains with these characteristics is of concern, and new therapeutic alternatives are essential to mitigate their harmful effects.
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Affiliation(s)
- Victoria Ballén
- ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain
| | - Yaiza Gabasa
- ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain
| | - Carlos Ratia
- ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain
| | - Raquel Ortega
- ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain
| | - Marc Tejero
- ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain
| | - Sara Soto
- ISGlobal, Hospital Clínic-Universitat de Barcelona, Barcelona, Spain
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Cepas V, Ballén V, Gabasa Y, Ramírez M, López Y, Soto SM. Transposon Insertion in the purL Gene Induces Biofilm Depletion in Escherichia coli ATCC 25922. Pathogens 2020; 9:pathogens9090774. [PMID: 32971800 PMCID: PMC7558270 DOI: 10.3390/pathogens9090774] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/18/2020] [Accepted: 09/19/2020] [Indexed: 12/20/2022] Open
Abstract
Current Escherichia coli antibiofilm treatments comprise a combination of antibiotics commonly used against planktonic cells, leading to treatment failure. A better understanding of the genes involved in biofilm formation could facilitate the development of efficient and specific new antibiofilm treatments. A total of 2578 E. coli mutants were generated by transposon insertion, of which 536 were analysed in this study. After sequencing, Tn263 mutant, classified as low biofilm-former (LF) compared to the wild-type (wt) strain (ATCC 25922), showed an interruption in the purL gene, involved in the de novo purine biosynthesis pathway. To elucidate the role of purL in biofilm formation, a knockout was generated showing reduced production of curli fibres, leading to an impaired biofilm formation. These conditions were restored by complementation of the strain or addition of exogenous inosine. Proteomic and transcriptional analyses were performed to characterise the differences caused by purL alterations. Thirteen proteins were altered compared to wt. The corresponding genes were analysed by qRT-PCR not only in the Tn263 and wt, but also in clinical strains with different biofilm activity. Overall, this study suggests that purL is essential for biofilm formation in E. coli and can be considered as a potential antibiofilm target.
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Cepas V, López Y, Gabasa Y, Martins CB, Ferreira JD, Correia MJ, Santos LMA, Oliveira F, Ramos V, Reis M, Castelo-Branco R, Morais J, Vasconcelos V, Probert I, Guilloud E, Mehiri M, Soto SM. Inhibition of Bacterial and Fungal Biofilm Formation by 675 Extracts from Microalgae and Cyanobacteria. Antibiotics (Basel) 2019; 8:antibiotics8020077. [PMID: 31212792 PMCID: PMC6628188 DOI: 10.3390/antibiotics8020077] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 06/03/2019] [Accepted: 06/05/2019] [Indexed: 11/17/2022] Open
Abstract
Bacterial biofilms are complex biological systems that are difficult to eradicate at a medical, industrial, or environmental level. Biofilms confer bacteria protection against external factors and antimicrobial treatments. Taking into account that about 80% of human infections are caused by bacterial biofilms, the eradication of these structures is a great priority. Biofilms are resistant to old-generation antibiotics, which has led to the search for new antimicrobials from different sources, including deep oceans/seas. In this study, 675 extracts obtained from 225 cyanobacteria and microalgae species (11 phyla and 6 samples belonging to unknown group) were obtained from different culture collections: The Blue Biotechnology and Ecotoxicology Culture Collection (LEGE-CC), the Coimbra Collection of Algae (ACOI) from Portugal, and the Roscoff Culture Collection (RCC) from France. The largest number of samples was made up of the microalgae phylum Chlorophyta (270) followed by Cyanobacteria (261). To obtain a large range of new bioactive compounds, a method involving three consecutive extractions (hexane, ethyl acetate, and methanol) was used. The antibiofilm activity of extracts was determined against seven different bacterial species and two Candida strains in terms of minimal biofilm inhibitory concentration (MBIC). The highest biofilm inhibition rates (%) were achieved against Candida albicans and Enterobacter cloacae. Charophyta, Chlorophyta, and Cyanobacteria were the most effective against all microorganisms. In particular, extracts of Cercozoa phylum presented the lowest MBIC50 and MBIC90 values for all the strains except C. albicans.
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Affiliation(s)
- Virginio Cepas
- ISGlobal, Hospital Clínic-Universitat de Barcelona, 08036 Barcelona, Spain.
| | - Yuly López
- ISGlobal, Hospital Clínic-Universitat de Barcelona, 08036 Barcelona, Spain.
| | - Yaiza Gabasa
- ISGlobal, Hospital Clínic-Universitat de Barcelona, 08036 Barcelona, Spain.
| | - Clara B Martins
- Coimbra Collection of Algae (ACOI), Department of Life Sciences, University of Coimbra, 3000-456 Coimbra, Portugal.
| | - Joana D Ferreira
- Coimbra Collection of Algae (ACOI), Department of Life Sciences, University of Coimbra, 3000-456 Coimbra, Portugal.
| | - Maria J Correia
- Coimbra Collection of Algae (ACOI), Department of Life Sciences, University of Coimbra, 3000-456 Coimbra, Portugal.
| | - Lília M A Santos
- Coimbra Collection of Algae (ACOI), Department of Life Sciences, University of Coimbra, 3000-456 Coimbra, Portugal.
| | - Flávio Oliveira
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), 4450-208 Porto, Portugal.
| | - Vitor Ramos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), 4450-208 Porto, Portugal.
| | - Mariana Reis
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), 4450-208 Porto, Portugal.
| | - Raquel Castelo-Branco
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), 4450-208 Porto, Portugal.
| | - João Morais
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), 4450-208 Porto, Portugal.
| | - Vitor Vasconcelos
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), 4450-208 Porto, Portugal.
- Faculty of Sciences, University of Porto, 4450-208 Porto, Portugal.
| | - Ian Probert
- Roscoff Culture Collection, Sorbonne University/CNRS, Roscoff Biological Station, 29680 Roscoff, France.
| | - Emilie Guilloud
- Roscoff Culture Collection, Sorbonne University/CNRS, Roscoff Biological Station, 29680 Roscoff, France.
| | - Mohamed Mehiri
- Marine Natural Products Team, Nice Institute of Chemistry, UMR 7272 University Nice Côte d'Azur/CNRS, 60103 Nice, France.
| | - Sara M Soto
- ISGlobal, Hospital Clínic-Universitat de Barcelona, 08036 Barcelona, Spain.
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