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Galvez-Llompart M, Hierrezuelo J, Blasco M, Zanni R, Galvez J, de Vicente A, Pérez-García A, Romero D. Targeting bacterial growth in biofilm conditions: rational design of novel inhibitors to mitigate clinical and food contamination using QSAR. J Enzyme Inhib Med Chem 2024; 39:2330907. [PMID: 38651823 DOI: 10.1080/14756366.2024.2330907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 03/06/2024] [Indexed: 04/25/2024] Open
Abstract
Antimicrobial resistance (AMR) is a pressing global issue exacerbated by the abuse of antibiotics and the formation of bacterial biofilms, which cause up to 80% of human bacterial infections. This study presents a computational strategy to address AMR by developing three novel quantitative structure-activity relationship (QSAR) models based on molecular topology to identify potential anti-biofilm and antibacterial agents. The models aim to determine the chemo-topological pattern of Gram (+) antibacterial, Gram (-) antibacterial, and biofilm formation inhibition activity. The models were applied to the virtual screening of a commercial chemical database, resulting in the selection of 58 compounds. Subsequent in vitro assays showed that three of these compounds exhibited the most promising antibacterial activity, with potential applications in enhancing food and medical device safety.
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Affiliation(s)
- Maria Galvez-Llompart
- Department of Preventive Medicine and Public Health, Food Science, Toxicology and Forensic Medicine, Faculty of Pharmacy, University of Valencia, Burjassot, Spain
- Department of Physical Chemistry, University of Valencia, Burjassot, Spain
- Department of Microbiology, Faculty of Science, Instituto de Hortofruticultura Subtropical y Mediterránea La Mayora, IHSM-UMA-CSIC, University of Málaga, Málaga, Spain
| | - Jesús Hierrezuelo
- Department of Microbiology, Faculty of Science, Instituto de Hortofruticultura Subtropical y Mediterránea La Mayora, IHSM-UMA-CSIC, University of Málaga, Málaga, Spain
| | - Mariluz Blasco
- Department of Microbiology, Faculty of Science, Instituto de Hortofruticultura Subtropical y Mediterránea La Mayora, IHSM-UMA-CSIC, University of Málaga, Málaga, Spain
| | - Riccardo Zanni
- Department of Physical Chemistry, University of Valencia, Burjassot, Spain
| | - Jorge Galvez
- Department of Physical Chemistry, University of Valencia, Burjassot, Spain
| | - Antonio de Vicente
- Department of Microbiology, Faculty of Science, Instituto de Hortofruticultura Subtropical y Mediterránea La Mayora, IHSM-UMA-CSIC, University of Málaga, Málaga, Spain
| | - Alejandro Pérez-García
- Department of Microbiology, Faculty of Science, Instituto de Hortofruticultura Subtropical y Mediterránea La Mayora, IHSM-UMA-CSIC, University of Málaga, Málaga, Spain
| | - Diego Romero
- Department of Microbiology, Faculty of Science, Instituto de Hortofruticultura Subtropical y Mediterránea La Mayora, IHSM-UMA-CSIC, University of Málaga, Málaga, Spain
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2
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Kungwani NA, Panda J, Mishra AK, Chavda N, Shukla S, Vikhe K, Sharma G, Mohanta YK, Sharifi-Rad M. Combating bacterial biofilms and related drug resistance: Role of phyto-derived adjuvant and nanomaterials. Microb Pathog 2024; 195:106874. [PMID: 39181190 DOI: 10.1016/j.micpath.2024.106874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 08/16/2024] [Accepted: 08/19/2024] [Indexed: 08/27/2024]
Abstract
The emergence of antimicrobial resistance (AMR) in clinical microbes has led to a search for novel antibiotics for combating bacterial infections. The treatment of bacterial infections becomes more challenging with the onset of biofilm formation. AMR is further accelerated by biofilm physiology and differential gene expression in bacteria with an inherent resistance to conventional antibiotics. In the search for innovative strategies to control the spread of AMR in clinical isolates, plant-derived therapeutic metabolites can be repurposed to control biofilm-associated drug resistance. Unlike antibiotics, designed to act on a single cellular process, phytochemicals can simultaneously target multiple cellular components. Furthermore, they can disrupt biofilm formation and inhibit quorum sensing, offering a comprehensive approach to combat bacterial infections. In bacterial biofilms, the first line of AMR is due to biofilms associated with the extracellular matrix, diffusion barriers, quorum sensing, and persister cells. These extracellular barriers can be overcome using phytochemical-based antibiotic adjuvants to increase the efficacy of antibiotic treatment and restrict the spread of AMR. Furthermore, phytochemicals can be used to target bacterial intracellular machinery such as DNA replication, protein synthesis, efflux pumps, and degrading enzymes. In parallel with pristine phytochemicals, phyto-derived nanomaterials have emerged as an effective means of fighting bacterial biofilms. These nanomaterials can be formulated to cross the biofilm barriers and function on cellular targets. This review focuses on the synergistic effects of phytochemicals and phyto-derived nanomaterials in controlling the progression of biofilm-related AMR. IT provides comprehensive insights into recent advancements and the underlying mechanisms of the use of phyto-derived adjuvants and nanomaterials.
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Affiliation(s)
- Neelam Amit Kungwani
- Department of Environmental Biotechnology, Gujarat Biotechnology University, Gandhinagar, Gujarat, 382355, India.
| | - Jibanjyoti Panda
- Nano-biotechnology and Translational Knowledge Laboratory, Department of Applied Biology, School of Biological Sciences, University of Science and Technology Meghalaya, Techno City, 9th Mile, Baridua, Ri-Bhoi, 793101, Meghalaya, India
| | - Awdhesh Kumar Mishra
- Department of Biotechnology, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea
| | | | - Sudhir Shukla
- Homi Bhabha National Institute, Biofouling and Biofilm Processes Section, WSCD, Chemistry Group, Bhabha Atomic Research Centre, Kalpakkam, Tamilnadu, 603102, India
| | - Kalyani Vikhe
- Department of Environmental Biotechnology, Gujarat Biotechnology University, Gandhinagar, Gujarat, 382355, India
| | - Gunjan Sharma
- Department of Plant Biotechnology, Gujarat Biotechnology University, Gandhinagar, Gujarat, 382355, India
| | - Yugal Kishore Mohanta
- Nano-biotechnology and Translational Knowledge Laboratory, Department of Applied Biology, School of Biological Sciences, University of Science and Technology Meghalaya, Techno City, 9th Mile, Baridua, Ri-Bhoi, 793101, Meghalaya, India; Centre for Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Kelambakkam, 603103, Tamil Nadu, India.
| | - Majid Sharifi-Rad
- Department of Range and Watershed Management, Faculty of Water and Soil, University of Zabol, Zabol, 98613-35856, Iran.
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Belay WY, Getachew M, Tegegne BA, Teffera ZH, Dagne A, Zeleke TK, Abebe RB, Gedif AA, Fenta A, Yirdaw G, Tilahun A, Aschale Y. Mechanism of antibacterial resistance, strategies and next-generation antimicrobials to contain antimicrobial resistance: a review. Front Pharmacol 2024; 15:1444781. [PMID: 39221153 PMCID: PMC11362070 DOI: 10.3389/fphar.2024.1444781] [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: 06/06/2024] [Accepted: 08/05/2024] [Indexed: 09/04/2024] Open
Abstract
Antibacterial drug resistance poses a significant challenge to modern healthcare systems, threatening our ability to effectively treat bacterial infections. This review aims to provide a comprehensive overview of the types and mechanisms of antibacterial drug resistance. To achieve this aim, a thorough literature search was conducted to identify key studies and reviews on antibacterial resistance mechanisms, strategies and next-generation antimicrobials to contain antimicrobial resistance. In this review, types of resistance and major mechanisms of antibacterial resistance with examples including target site modifications, decreased influx, increased efflux pumps, and enzymatic inactivation of antibacterials has been discussed. Moreover, biofilm formation, and horizontal gene transfer methods has also been included. Furthermore, measures (interventions) taken to control antimicrobial resistance and next-generation antimicrobials have been discussed in detail. Overall, this review provides valuable insights into the diverse mechanisms employed by bacteria to resist the effects of antibacterial drugs, with the aim of informing future research and guiding antimicrobial stewardship efforts.
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Affiliation(s)
- Wubetu Yihunie Belay
- Department of Pharmacy, College of Health Sciences, Debre Markos University, Debre Markos, Ethiopia
| | - Melese Getachew
- Department of Pharmacy, College of Health Sciences, Debre Markos University, Debre Markos, Ethiopia
| | - Bantayehu Addis Tegegne
- Department of Pharmacy, College of Health Sciences, Debre Markos University, Debre Markos, Ethiopia
| | - Zigale Hibstu Teffera
- Department of Medical Laboratory Science, College of Health Sciences, Debre Markos University, Debre Markos, Ethiopia
| | - Abebe Dagne
- Department of Pharmacy, College of Health Sciences, Debre Markos University, Debre Markos, Ethiopia
| | - Tirsit Ketsela Zeleke
- Department of Pharmacy, College of Health Sciences, Debre Markos University, Debre Markos, Ethiopia
| | - Rahel Belete Abebe
- Department of clinical pharmacy, College of medicine and health sciences, University of Gondar, Gondar, Ethiopia
| | - Abebaw Abie Gedif
- Department of Pharmacy, College of Health Sciences, Debre Markos University, Debre Markos, Ethiopia
| | - Abebe Fenta
- Department of Medical Laboratory Science, College of Health Sciences, Debre Markos University, Debre Markos, Ethiopia
| | - Getasew Yirdaw
- Department of environmental health science, College of Health Sciences, Debre Markos University, Debre Markos, Ethiopia
| | - Adane Tilahun
- Department of Medical Laboratory Science, College of Health Sciences, Debre Markos University, Debre Markos, Ethiopia
| | - Yibeltal Aschale
- Department of Medical Laboratory Science, College of Health Sciences, Debre Markos University, Debre Markos, Ethiopia
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Lu L, Zhao Y, Li M, Wang X, Zhu J, Liao L, Wang J. Contemporary strategies and approaches for characterizing composition and enhancing biofilm penetration targeting bacterial extracellular polymeric substances. J Pharm Anal 2024; 14:100906. [PMID: 38634060 PMCID: PMC11022105 DOI: 10.1016/j.jpha.2023.11.013] [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: 08/04/2023] [Revised: 11/08/2023] [Accepted: 11/26/2023] [Indexed: 04/19/2024] Open
Abstract
Extracellular polymeric substances (EPS) constitutes crucial elements within bacterial biofilms, facilitating accelerated antimicrobial resistance and conferring defense against the host's immune cells. Developing precise and effective antibiofilm approaches and strategies, tailored to the specific characteristics of EPS composition, can offer valuable insights for the creation of novel antimicrobial drugs. This, in turn, holds the potential to mitigate the alarming issue of bacterial drug resistance. Current analysis of EPS compositions relies heavily on colorimetric approaches with a significant bias, which is likely due to the selection of a standard compound and the cross-interference of various EPS compounds. Considering the pivotal role of EPS in biofilm functionality, it is imperative for EPS research to delve deeper into the analysis of intricate compositions, moving beyond the current focus on polymeric materials. This necessitates a shift from heavy reliance on colorimetric analytic methods to more comprehensive and nuanced analytical approaches. In this study, we have provided a comprehensive summary of existing analytical methods utilized in the characterization of EPS compositions. Additionally, novel strategies aimed at targeting EPS to enhance biofilm penetration were explored, with a specific focus on highlighting the limitations associated with colorimetric methods. Furthermore, we have outlined the challenges faced in identifying additional components of EPS and propose a prospective research plan to address these challenges. This review has the potential to guide future researchers in the search for novel compounds capable of suppressing EPS, thereby inhibiting biofilm formation. This insight opens up a new avenue for exploration within this research domain.
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Affiliation(s)
- Lan Lu
- Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610000, China
| | - Yuting Zhao
- Meishan Pharmaceutical Vocational College, School of Pharmacy, Meishan, Sichuan, 620200, China
| | - Mingxing Li
- Laboratory of Molecular Pharmacology, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, 646000, China
| | - Xiaobo Wang
- Hepatobiliary Surgery, Langzhong People's Hospital, Langzhong, Sichuan, 646000, China
| | - Jie Zhu
- Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610000, China
| | - Li Liao
- Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610000, China
| | - Jingya Wang
- Key Laboratory of Medicinal and Edible Plants Resources Development of Sichuan Education Department, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610000, China
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5
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Hu C, He G, Yang Y, Wang N, Zhang Y, Su Y, Zhao F, Wu J, Wang L, Lin Y, Shao L. Nanomaterials Regulate Bacterial Quorum Sensing: Applications, Mechanisms, and Optimization Strategies. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2306070. [PMID: 38350718 PMCID: PMC11022734 DOI: 10.1002/advs.202306070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 01/19/2024] [Indexed: 02/15/2024]
Abstract
Anti-virulence therapy that interferes with bacterial communication, known as "quorum sensing (QS)", is a promising strategy for circumventing bacterial resistance. Using nanomaterials to regulate bacterial QS in anti-virulence therapy has attracted much attention, which is mainly attributed to unique physicochemical properties and excellent designability of nanomaterials. However, bacterial QS is a dynamic and multistep process, and there are significant differences in the specific regulatory mechanisms and related influencing factors of nanomaterials in different steps of the QS process. An in-depth understanding of the specific regulatory mechanisms and related influencing factors of nanomaterials in each step can significantly optimize QS regulatory activity and enhance the development of novel nanomaterials with better comprehensive performance. Therefore, this review focuses on the mechanisms by which nanomaterials regulate bacterial QS in the signal supply (including signal synthesis, secretion, and accumulation) and signal transduction cascade (including signal perception and response) processes. Moreover, based on the two key influencing factors (i.e., the nanomaterial itself and the environment), optimization strategies to enhance the QS regulatory activity are comprehensively summarized. Collectively, applying nanomaterials to regulate bacterial QS is a promising strategy for anti-virulence therapy. This review provides reference and inspiration for further research on the anti-virulence application of nanomaterials.
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Affiliation(s)
- Chen Hu
- Stomatological Hospital, School of StomatologySouthern Medical UniversityGuangzhou510280China
| | - Guixin He
- Stomatological Hospital, School of StomatologySouthern Medical UniversityGuangzhou510280China
| | - Yujun Yang
- Stomatological Hospital, School of StomatologySouthern Medical UniversityGuangzhou510280China
| | - Ning Wang
- Stomatological Hospital, School of StomatologySouthern Medical UniversityGuangzhou510280China
| | - Yanli Zhang
- Stomatological Hospital, School of StomatologySouthern Medical UniversityGuangzhou510280China
| | - Yuan Su
- Stomatological Hospital, School of StomatologySouthern Medical UniversityGuangzhou510280China
- Stomatology CenterShunde HospitalSouthern Medical University (The First People's Hospital of Shunde)Foshan528399China
| | - Fujian Zhao
- Stomatological Hospital, School of StomatologySouthern Medical UniversityGuangzhou510280China
| | - Junrong Wu
- Stomatological Hospital, School of StomatologySouthern Medical UniversityGuangzhou510280China
| | - Linlin Wang
- Hainan General Hospital·Hainan Affiliated Hospital of Hainan medical UniversityHaikou570311China
| | - Yuqing Lin
- Shenzhen Luohu People's HospitalShenzhen518000China
| | - Longquan Shao
- Stomatological Hospital, School of StomatologySouthern Medical UniversityGuangzhou510280China
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6
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Visser JA, Yager D, Chambers SA, Lim JY, Cao X, Cegelski L. Nordihydroguaiaretic Acid (NDGA) Inhibits CsgA Polymerization, Bacterial Amyloid Biogenesis, and Biofilm Formation. Chembiochem 2023; 24:e202300266. [PMID: 37195016 DOI: 10.1002/cbic.202300266] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 05/13/2023] [Accepted: 05/15/2023] [Indexed: 05/18/2023]
Abstract
Escherichia coli and other Enterobacteriaceae thrive in robust biofilm communities through the coproduction of curli amyloid fibers and phosphoethanolamine cellulose. Curli promote adhesion to abiotic surfaces and plant and human host tissues and are associated with pathogenesis in urinary tract infection and food-borne illness. The production of curli in the host has also been implicated in the pathogenesis of neurodegenerative diseases. We report that the natural product nordihydroguaiaretic acid (NDGA) is effective as a curlicide in E. coli. NDGA prevents CsgA polymerization in vitro in a dose-dependent manner. NDGA selectively inhibits cell-associated curli assembly and inhibits uropathogenic E. coli biofilm formation. More broadly, this work emphasizes the ability to evaluate and identify bioactive amyloid assembly inhibitors by using the powerful gene-directed amyloid biogenesis machinery in E. coli.
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Affiliation(s)
- Joshua A Visser
- Department of Chemistry, Stanford University, 380 Roth Way, Keck Building, Stanford, CA, 94305, USA
| | - Deborah Yager
- Department of Chemistry, Stanford University, 380 Roth Way, Keck Building, Stanford, CA, 94305, USA
| | - Schuyler A Chambers
- Department of Chemistry, Stanford University, 380 Roth Way, Keck Building, Stanford, CA, 94305, USA
| | - Ji Youn Lim
- Department of Chemistry, Stanford University, 380 Roth Way, Keck Building, Stanford, CA, 94305, USA
| | - Xujun Cao
- Department of Chemistry, Stanford University, 380 Roth Way, Keck Building, Stanford, CA, 94305, USA
| | - Lynette Cegelski
- Department of Chemistry, Stanford University, 380 Roth Way, Keck Building, Stanford, CA, 94305, USA
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7
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Hayet S, Ghrayeb M, Azulay DN, Shpilt Z, Tshuva EY, Chai L. Titanium complexes affect Bacillus subtilis biofilm formation. RSC Med Chem 2023; 14:983-991. [PMID: 37252093 PMCID: PMC10211322 DOI: 10.1039/d3md00075c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 05/01/2023] [Indexed: 05/31/2023] Open
Abstract
Biofilms are surface or interface-associated communities of bacterial cells, embedded in a self-secreted extracellular matrix (ECM). Cells in biofilms are 100-1000 times more resistant to antibiotic treatment relative to planktonic cells due to various reasons, including the ECM acting as a diffusion barrier to antibiotic molecules, the presence of persister cells that divide slowly and are less susceptible to cell-wall targeting drugs, and the activation of efflux pumps in response to antibiotic stress. In this study we tested the effect of two titanium(iv) complexes that have been previously reported as potent and non-toxic anticancer chemotherapeutic agents on Bacillus subtilis cells in culture and in biofilm forming conditions. The Ti(iv) complexes tested, a hexacoordinate diaminobis(phenolato)-bis(alkoxo) complex (phenolaTi) and a bis(isopropoxo) complex of a diaminobis(phenolato) "salan"-type ligand (salanTi), did not affect the growth rate of cells in shaken cultures, however they did affect biofilm formation. Surprisingly, while phenolaTi inhibited biofilm formation, the presence of salanTi induced the formation of more mechanically robust biofilms. Optical microscopy images of biofilm samples in the absence and presence of Ti(iv) complexes suggest that Ti(iv) complexes affect cell-cell and/or cell-matrix adhesion, and that these are interfered with phenolaTi and enhanced by salanTi. Our results highlight the possible effect of Ti(iv) complexes on bacterial biofilms, which is gaining interest in light of the emerging relations between bacteria and cancerous tumors.
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Affiliation(s)
- Shahar Hayet
- Institute of Chemistry, The Hebrew University of Jerusalem Edmond J. Safra Campus Jerusalem 91904 Israel +972 2 5660425 +972 2 6586084 +972 2 6585303
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem Jerusalem Israel
| | - Mnar Ghrayeb
- Institute of Chemistry, The Hebrew University of Jerusalem Edmond J. Safra Campus Jerusalem 91904 Israel +972 2 5660425 +972 2 6586084 +972 2 6585303
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem Jerusalem Israel
| | - David N Azulay
- Institute of Chemistry, The Hebrew University of Jerusalem Edmond J. Safra Campus Jerusalem 91904 Israel +972 2 5660425 +972 2 6586084 +972 2 6585303
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem Jerusalem Israel
| | - Zohar Shpilt
- Institute of Chemistry, The Hebrew University of Jerusalem Edmond J. Safra Campus Jerusalem 91904 Israel +972 2 5660425 +972 2 6586084 +972 2 6585303
| | - Edit Y Tshuva
- Institute of Chemistry, The Hebrew University of Jerusalem Edmond J. Safra Campus Jerusalem 91904 Israel +972 2 5660425 +972 2 6586084 +972 2 6585303
| | - Liraz Chai
- Institute of Chemistry, The Hebrew University of Jerusalem Edmond J. Safra Campus Jerusalem 91904 Israel +972 2 5660425 +972 2 6586084 +972 2 6585303
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem Jerusalem Israel
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Frenkel A, Zecharia E, Gómez-Pérez D, Sendersky E, Yegorov Y, Jacob A, Benichou JIC, Stierhof YD, Parnasa R, Golden SS, Kemen E, Schwarz R. Cell specialization in cyanobacterial biofilm development revealed by expression of a cell-surface and extracellular matrix protein. NPJ Biofilms Microbiomes 2023; 9:10. [PMID: 36864092 PMCID: PMC9981879 DOI: 10.1038/s41522-023-00376-6] [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: 07/21/2022] [Accepted: 02/06/2023] [Indexed: 03/04/2023] Open
Abstract
Cyanobacterial biofilms are ubiquitous and play important roles in diverse environments, yet, understanding of the processes underlying the development of these aggregates is just emerging. Here we report cell specialization in formation of Synechococcus elongatus PCC 7942 biofilms-a hitherto unknown characteristic of cyanobacterial social behavior. We show that only a quarter of the cell population expresses at high levels the four-gene ebfG-operon that is required for biofilm formation. Almost all cells, however, are assembled in the biofilm. Detailed characterization of EbfG4 encoded by this operon revealed cell-surface localization as well as its presence in the biofilm matrix. Moreover, EbfG1-3 were shown to form amyloid structures such as fibrils and are thus likely to contribute to the matrix structure. These data suggest a beneficial 'division of labor' during biofilm formation where only some of the cells allocate resources to produce matrix proteins-'public goods' that support robust biofilm development by the majority of the cells. In addition, previous studies revealed the operation of a self-suppression mechanism that depends on an extracellular inhibitor, which supresses transcription of the ebfG-operon. Here we revealed inhibitor activity at an early growth stage and its gradual accumulation along the exponential growth phase in correlation with cell density. Data, however, do not support a threshold-like phenomenon known for quorum-sensing in heterotrophs. Together, data presented here demonstrate cell specialization and imply density-dependent regulation thereby providing deep insights into cyanobacterial communal behavior.
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Affiliation(s)
- Alona Frenkel
- grid.22098.310000 0004 1937 0503The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, 5290002 Ramat-Gan, Israel
| | - Eli Zecharia
- grid.22098.310000 0004 1937 0503The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, 5290002 Ramat-Gan, Israel
| | - Daniel Gómez-Pérez
- grid.10392.390000 0001 2190 1447Center for Plant Molecular Biology (ZMBP), University of Tübingen, 72074 Tübingen, Germany
| | - Eleonora Sendersky
- grid.22098.310000 0004 1937 0503The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, 5290002 Ramat-Gan, Israel
| | - Yevgeni Yegorov
- grid.22098.310000 0004 1937 0503The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, 5290002 Ramat-Gan, Israel
| | - Avi Jacob
- grid.22098.310000 0004 1937 0503The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, 5290002 Ramat-Gan, Israel
| | - Jennifer I. C. Benichou
- grid.22098.310000 0004 1937 0503The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, 5290002 Ramat-Gan, Israel
| | - York-Dieter Stierhof
- grid.10392.390000 0001 2190 1447Center for Plant Molecular Biology (ZMBP), University of Tübingen, 72074 Tübingen, Germany
| | - Rami Parnasa
- grid.22098.310000 0004 1937 0503The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, 5290002 Ramat-Gan, Israel
| | - Susan S. Golden
- grid.266100.30000 0001 2107 4242Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093 USA ,grid.266100.30000 0001 2107 4242Center for Circadian Biology, University of California, San Diego, La Jolla, CA 92093 USA
| | - Eric Kemen
- grid.10392.390000 0001 2190 1447Center for Plant Molecular Biology (ZMBP), University of Tübingen, 72074 Tübingen, Germany
| | - Rakefet Schwarz
- The Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, 5290002, Ramat-Gan, Israel.
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9
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Miller T, Waturangi DE, Yogiara. Antibiofilm properties of bioactive compounds from Actinomycetes against foodborne and fish pathogens. Sci Rep 2022; 12:18614. [PMID: 36329158 PMCID: PMC9633603 DOI: 10.1038/s41598-022-23455-8] [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: 06/02/2022] [Accepted: 10/31/2022] [Indexed: 11/06/2022] Open
Abstract
In nature, bacteria can form biofilms, multi-layered structures that adhere microbial populations to solid surfaces by exopolysaccharides, proteins, and nucleic acids. In addition to causing foodborne infections, biofilms can be a major problem in aquaculture. Actinomycetes extracts have previously demonstrated antibiofilm activity against multiple foodborne and fish pathogens, and further characterization of these extracts is needed. In this study, we identified the chemical structures and antibiofilm properties of four extracts and determined the genetic similarity of the isolates to known Streptomyces isolates. We found that several extracts contained multiple antibiofilm compounds, and the antibiofilm activities of all extracts were most stable at pH 6. Furthermore, the antibiofilm inhibition and destruction activities of the isolates were stable at different temperatures. All of crude extracts demonstrated activity against biofilms formed by foodborne and fish pathogens on the surface of stainless-steel coupons as well as polystyrene that commonly used in industrial equipment. Using PCR 16S-rRNA gene and DNA sequencing analysis, the four Actinomycetes isolates were found to be 99% (1 AC), 97% (20 PM), 95% (16 PM), and 85% (18 PM) similar to Streptomyces. Biofilm structure were analyzed using Scanning Electron Microscopy coupled with Energy-Dispersive Spectrometry analysis. Coniine/(S)-2-propylpiperidine was the most active fraction of the crude extracts of the 1 AC, 20 PM, and 16 PM isolates, and piperidine, 2-(tetrahydro-2-furanyl) was most active in the 18 PM isolate.
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Affiliation(s)
- Tracy Miller
- grid.443450.20000 0001 2288 786XBiotechnology Department, Faculty of Biotechnology, Atma Jaya Catholic University of Indonesia, Jenderal Sudirman 51 Street, South Jakarta, DKI Jakarta 12930 Indonesia
| | - Diana Elizabeth Waturangi
- grid.443450.20000 0001 2288 786XBiotechnology Department, Faculty of Biotechnology, Atma Jaya Catholic University of Indonesia, Jenderal Sudirman 51 Street, South Jakarta, DKI Jakarta 12930 Indonesia
| | - Yogiara
- grid.443450.20000 0001 2288 786XBiotechnology Department, Faculty of Biotechnology, Atma Jaya Catholic University of Indonesia, Jenderal Sudirman 51 Street, South Jakarta, DKI Jakarta 12930 Indonesia
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10
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Yarmola E, Ishkov IP, di Cologna NM, Menashe M, Whitener RL, Long JR, Abranches J, Hagen SJ, Brady LJ. Amyloid Aggregates Are Localized to the Nonadherent Detached Fraction of Aging Streptococcus mutans Biofilms. Microbiol Spectr 2022; 10:e0166122. [PMID: 35950854 PMCID: PMC9431626 DOI: 10.1128/spectrum.01661-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 07/21/2022] [Indexed: 11/23/2022] Open
Abstract
The number of bacterial species recognized to utilize purposeful amyloid aggregation within biofilms continues to grow. The oral pathogen Streptococcus mutans produces several amyloidogenic proteins, including adhesins P1 (also known as AgI/II, PAc) and WapA, whose truncation products, namely, AgII and AgA, respectively, represent the amyloidogenic moieties. Amyloids demonstrate common biophysical properties, including recognition by Thioflavin T (ThT) and Congo red (CR) dyes that bind to the cross β-sheet quaternary structure of amyloid aggregates. Previously, we observed amyloid formation to occur only after 60 h or more of S. mutans biofilm growth. Here, we extend those findings to investigate where amyloid is detected within 1- and 5-day-old biofilms, including within tightly adherent compared with those in nonadherent fractions. CR birefringence and ThT uptake demonstrated amyloid within nonadherent material removed from 5-day-old cultures but not within 1-day-old or adherent samples. These experiments were done in conjunction with confocal microscopy and immunofluorescence staining with AgII- and AgA-reactive antibodies, including monoclonal reagents shown to discriminate between monomeric protein and amyloid aggregates. These results also localized amyloid primarily to the nonadherent fraction of biofilms. Lastly, we show that the C-terminal region of P1 loses adhesive function following amyloidogenesis and is no longer able to competitively inhibit binding of S. mutans to its physiologic substrate, salivary agglutinin. Taken together, our results provide new evidence that amyloid aggregation negatively impacts the functional activity of a widely studied S. mutans adhesin and are consistent with a model in which amyloidogenesis of adhesive proteins facilitates the detachment of aging biofilms. IMPORTANCE Streptococcus mutans is a keystone pathogen and causative agent of human dental caries, commonly known as tooth decay, the most prevalent infectious disease in the world. Like many pathogens, S. mutans causes disease in biofilms, which for dental decay begins with bacterial attachment to the salivary pellicle coating the tooth surface. Some strains of S. mutans are also associated with bacterial endocarditis. Amyloid aggregation was initially thought to represent only a consequence of protein mal-folding, but now, many microorganisms are known to produce functional amyloids with biofilm environments. In this study, we learned that amyloid formation diminishes the activity of a known S. mutans adhesin and that amyloid is found within the nonadherent fraction of older biofilms. This finding suggests that the transition from adhesin monomer to amyloid facilitates biofilm detachment. Knowing where and when S. mutans produces amyloid will help in developing therapeutic strategies to control tooth decay and other biofilm-related diseases.
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Affiliation(s)
- Elena Yarmola
- Department of Oral Biology, University of Florida, Gainesville, Florida, USA
| | - Ivan P. Ishkov
- Department of Oral Biology, University of Florida, Gainesville, Florida, USA
| | | | - Megan Menashe
- Department of Oral Biology, University of Florida, Gainesville, Florida, USA
| | - Robert L. Whitener
- Department of Oral Biology, University of Florida, Gainesville, Florida, USA
| | - Joanna R. Long
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, Florida, USA
| | | | - Stephen J. Hagen
- Department of Physics, University of Florida, Gainesville, Florida, USA
| | - L. Jeannine Brady
- Department of Oral Biology, University of Florida, Gainesville, Florida, USA
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11
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Small molecules as next generation biofilm inhibitors and anti-infective agents. PHYSICAL SCIENCES REVIEWS 2022. [DOI: 10.1515/psr-2021-0175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Biofilms are consortia of microbes attached to surfaces that could be biotic or abiotic in nature. The bacterial cells are enclosed within a microbial synthesized extrapolymeric substances (EPS). The presence of a thick EPS matrix around the cells, protects it from antimicrobials. As the biofilms are difficult to be eradicated in the tissues and implants, the infections due to biofilms are chronic, persistent as well as recurrent in nature. Biofilm formation in multidrug resistant pathogens is a major public health concern. In this review, we have discussed traditional drug discovery approaches and high throughput screening assays involved in the discovery of small molecules for their application as biofilm inhibitory agents. The small molecules target different phases of biofilm growth in pathogenic bacteria. Here, we have focused on three specific application of small molecules, as anti-adhesion agents that prevent adherence and attachment of cells to surfaces; signal inhibitors that disrupt communication between cells resulting in hampered biofilm growth and development; and finally as agents that induce release of cells from mature biofilms. Some of the biofilm inhibitors have also potentiated the antibiotic efficacy leading to complete eradication of biofilms. It is highly pertinent now to focus on developing these as therapeutics and anti-biofilm agents for coating medical implants and devices in clinical settings.
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12
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Chen Y, Cui G, Cui Y, Chen D, Lin H. Small molecule targeting amyloid fibrils inhibits Streptococcus mutans biofilm formation. AMB Express 2021; 11:171. [PMID: 34919191 PMCID: PMC8683520 DOI: 10.1186/s13568-021-01333-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Accepted: 12/11/2021] [Indexed: 11/10/2022] Open
Abstract
Amyloid fibrils are important scaffold in bacterial biofilms. Streptococcus mutans is an established cariogenic bacteria dwelling within biofilms, and C123 segment of P1 protein is known to form amyloid fibrils in S. mutans biofilms, among which C3 segment could serve as a promising anti-amyloid target due to its critical role in C123-P1 interactions. Recently, small molecules have been found to successfully inhibit biofilms by targeting amyloid fibrils. Thus, our study aimed to screen small molecules targeting C3 segment with the capacity to influence amyloid fibrils and S. mutans biofilms. In silico screening was utilized to discover promising small molecules, which were evaluated for their effects on bacterial cells and amyloid fibrils. We selected 99 small molecules and enrolled 55 small molecules named D1-D55 for crystal violet staining. Notably, D25 selectively inhibit S. mutans biofilms but had no significant influence on biofilms formed by Streptococcus gordonii and Streptococcus sanguinis, and D25 showed no bactericidal effects and low cytotoxicity. In addition, amyloid fibrils in free-floating bacteria, biofilms and purified C123 were quantified with ThT assays, and the differences were not statistically significant in the presence or absence of D25. Morphological changes of amyloid fibrils were visualized with TEM images, where amorphous aggregates were obvious coupled with long and atypical amyloid fibrils. Moreover, amyloid-related genes were upregulated in response to D25. In conclusion, D25 is a promising antimicrobial agent with the capacity to influence amyloid fibrils and inhibit S. mutans biofilms.
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Affiliation(s)
- Yuanyuan Chen
- Department of Preventive Dentistry, Hospital of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong China
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong China
| | - Guxin Cui
- Department of Preventive Dentistry, Hospital of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong China
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong China
| | - Yuqi Cui
- Department of Preventive Dentistry, Hospital of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong China
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong China
| | - Dongru Chen
- Department of Orthodontics, Hospital of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong China
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong China
| | - Huancai Lin
- Department of Preventive Dentistry, Hospital of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong China
- Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-Sen University, Guangzhou, Guangdong China
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13
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Cruz A, Condinho M, Carvalho B, Arraiano CM, Pobre V, Pinto SN. The Two Weapons against Bacterial Biofilms: Detection and Treatment. Antibiotics (Basel) 2021; 10:1482. [PMID: 34943694 PMCID: PMC8698905 DOI: 10.3390/antibiotics10121482] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 11/29/2021] [Accepted: 12/01/2021] [Indexed: 12/12/2022] Open
Abstract
Bacterial biofilms are defined as complex aggregates of bacteria that grow attached to surfaces or are associated with interfaces. Bacteria within biofilms are embedded in a self-produced extracellular matrix made of polysaccharides, nucleic acids, and proteins. It is recognized that bacterial biofilms are responsible for the majority of microbial infections that occur in the human body, and that biofilm-related infections are extremely difficult to treat. This is related with the fact that microbial cells in biofilms exhibit increased resistance levels to antibiotics in comparison with planktonic (free-floating) cells. In the last years, the introduction into the market of novel compounds that can overcome the resistance to antimicrobial agents associated with biofilm infection has slowed down. If this situation is not altered, millions of lives are at risk, and this will also strongly affect the world economy. As such, research into the identification and eradication of biofilms is important for the future of human health. In this sense, this article provides an overview of techniques developed to detect and imaging biofilms as well as recent strategies that can be applied to treat biofilms during the several biofilm formation steps.
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Affiliation(s)
- Adriana Cruz
- iBB—Institute for Bioengineering and Biosciences, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;
- i4HB—Institute for Health and Bioeconomy, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Manuel Condinho
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal; (M.C.); (B.C.); (C.M.A.)
| | - Beatriz Carvalho
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal; (M.C.); (B.C.); (C.M.A.)
| | - Cecília M. Arraiano
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal; (M.C.); (B.C.); (C.M.A.)
| | - Vânia Pobre
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal; (M.C.); (B.C.); (C.M.A.)
| | - Sandra N. Pinto
- iBB—Institute for Bioengineering and Biosciences, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;
- i4HB—Institute for Health and Bioeconomy, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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14
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The Role of Surfactin Production by Bacillus velezensis on Colonization, Biofilm Formation on Tomato Root and Leaf Surfaces and Subsequent Protection (ISR) against Botrytis cinerea. Microorganisms 2021; 9:microorganisms9112251. [PMID: 34835375 PMCID: PMC8626045 DOI: 10.3390/microorganisms9112251] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Revised: 10/14/2021] [Accepted: 10/14/2021] [Indexed: 11/17/2022] Open
Abstract
Many aspects regarding the role of lipopeptides (LPs) in bacterial interaction with plants are not clear yet. Of particular interest is the LP family of surfactin, immunogenic molecules involved in induced systemic resistance (ISR) and the bacterial colonization of plant surfaces. We hypothesize that the concentration of surfactin produced by a strain correlates directly with its ability to colonize and persist on different plant surfaces, which conditions its capacity to trigger ISR. We used two Bacillus velezensis strains (BBC023 and BBC047), whose antagonistic potential in vitro is practically identical, but not on plant surfaces. The surfactin production of BBC047 is 1/3 higher than that of BBC023. Population density and SEM images revealed stable biofilms of BBC047 on leaves and roots, activating ISR on both plant surfaces. Despite its lower surfactin production, strain BBC023 assembled stable biofilms on roots and activated ISR. However, on leaves only isolated, unstructured populations were observed, which could not activate ISR. Thus, the ability of a strain to effectively colonize a plant surface is not only determined through its production of surfactin. Multiple aspects, such as environmental stressors or compensation mechanisms may influence the process. Finally, the importance of surfactin lies in its impacts on biofilm formation and stable colonization, which finally enables its activity as an elicitor of ISR.
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15
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Bondia P, Flors C, Torra J. Boosting the inactivation of bacterial biofilms by photodynamic targeting of matrix structures with Thioflavin T. Chem Commun (Camb) 2021; 57:8648-8651. [PMID: 34369943 DOI: 10.1039/d1cc03155d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report that Thioflavin T (ThT), the reference fluorogenic probe for amyloid detection, displays photodynamic activity against bacterial biofilms. ThT recognizes key structures of the biofilm matrix, disrupting the complex architecture and efficiently inactivating bacterial cells. We also show that ThT phototherapy synergistically boosts the activity of conventional antimicrobials.
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Affiliation(s)
- Patricia Bondia
- Madrid Institute for Advanced Studies in Nanoscience (IMDEA Nanociencia), Madrid, Spain.
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16
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Trebino MA, Shingare RD, MacMillan JB, Yildiz FH. Strategies and Approaches for Discovery of Small Molecule Disruptors of Biofilm Physiology. Molecules 2021; 26:molecules26154582. [PMID: 34361735 PMCID: PMC8348372 DOI: 10.3390/molecules26154582] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 07/24/2021] [Accepted: 07/26/2021] [Indexed: 12/02/2022] Open
Abstract
Biofilms, the predominant growth mode of microorganisms, pose a significant risk to human health. The protective biofilm matrix, typically composed of exopolysaccharides, proteins, nucleic acids, and lipids, combined with biofilm-grown bacteria’s heterogenous physiology, leads to enhanced fitness and tolerance to traditional methods for treatment. There is a need to identify biofilm inhibitors using diverse approaches and targeting different stages of biofilm formation. This review discusses discovery strategies that successfully identified a wide range of inhibitors and the processes used to characterize their inhibition mechanism and further improvement. Additionally, we examine the structure–activity relationship (SAR) for some of these inhibitors to optimize inhibitor activity.
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Affiliation(s)
- Michael A. Trebino
- Department of Microbiology and Environmental Toxicology, University of California, Santa Cruz, CA 95064, USA;
| | - Rahul D. Shingare
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064, USA;
| | - John B. MacMillan
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA 95064, USA;
- Correspondence: (J.B.M.); (F.H.Y.)
| | - Fitnat H. Yildiz
- Department of Microbiology and Environmental Toxicology, University of California, Santa Cruz, CA 95064, USA;
- Correspondence: (J.B.M.); (F.H.Y.)
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17
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Ruhal R, Kataria R. Biofilm patterns in gram-positive and gram-negative bacteria. Microbiol Res 2021; 251:126829. [PMID: 34332222 DOI: 10.1016/j.micres.2021.126829] [Citation(s) in RCA: 91] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 07/18/2021] [Accepted: 07/21/2021] [Indexed: 12/11/2022]
Abstract
The Gram-positive and Gram-negative bacteria are attributable to matrix-enclosed aggregates known as biofilms. Biofilms are root cause of industrial biofouling and characterized by antimicrobial resistance during infections. Many biofilm studies examine specific Gram type cultures, whereas nearly all biofilm communities in nature comprise both Gram-negative and Gram-positive bacteria. Thus, a greater understanding of the conserved themes in biofilm formation is required for common therapeutics. We tried to focus on common components which exist at each stage of biofilm development and regulation. The Lipopolysaccharides (LPS) and cell wall glyco-polymers of Gram-negative and Gram-positive bacteria seem to play similar roles during initial adhesion. The inhibition of the polymerization of amyloid-like proteins might impact the biofilms of both Gram-type bacteria. Enzymatic degradation of matrix components by glycoside hydrolase and DNase (nuclease) may disrupt both Gram-type biofilms. An additional common feature is the presence of membrane vesicles, and the potential of these vesicles requires further investigation. Genetic regulation by c-di-GMP is prominent in Gram-negative bacteria. However, quorum sensing (QS) may play a common regulation during biofilms dispersal. These studies are significant not only for common therapeutic against mixed biofilms, but for better understanding of bacterial interactions within natural or host infection environment as well.
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Affiliation(s)
- Rohit Ruhal
- Regional Centre for Biotechnology, Faridabad, India.
| | - Rashmi Kataria
- Department of Biotechnology, Delhi Technological University, Delhi, India
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18
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Matilla-Cuenca L, Toledo-Arana A, Valle J. Anti-Biofilm Molecules Targeting Functional Amyloids. Antibiotics (Basel) 2021; 10:antibiotics10070795. [PMID: 34210036 PMCID: PMC8300730 DOI: 10.3390/antibiotics10070795] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/24/2021] [Accepted: 06/25/2021] [Indexed: 12/18/2022] Open
Abstract
The choice of an effective therapeutic strategy in the treatment of biofilm-related infections is a significant issue. Amyloids, which have been historically related to human diseases, are now considered to be prevailing structural components of the biofilm matrix in a wide range of bacteria. This assumption creates the potential for an exciting research area, in which functional amyloids are considered to be attractive targets for drug development to dissemble biofilm structures. The present review describes the best-characterized bacterial functional amyloids and focuses on anti-biofilm agents that target intrinsic and facultative amyloids. This study provides a better understanding of the different modes of actions of the anti-amyloid molecules to inhibit biofilm formation. This information can be further exploited to improve the therapeutic strategies to combat biofilm-related infections.
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19
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Azulay DN, Ghrayeb M, Ktorza IB, Nir I, Nasser R, Harel YS, Chai L. Colloidal-like aggregation of a functional amyloid protein. Phys Chem Chem Phys 2020; 22:23286-23294. [PMID: 33033811 DOI: 10.1039/d0cp03265d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Functional amyloid proteins are self-secreted by microbial cells that aggregate into extracellular networks and provide microbial colonies with mechanical stability and resistance to antibiotic treatment. In order to understand the formation mechanism of functional amyloid networks, their aggregation has been studied in vitro under different physical conditions, such as temperature, salt concentration, and pH. Typical aggregates' morphologies include fibers or plaques, the latter resembling amyloid aggregates in neurodegenerated brains. Here, we studied the pH-reduction-induced aggregation of TasA, an extracellular functional amyloid appearing as fibers in biofilms of the soil bacterium, Bacillus subtilis. We used turbidity and zeta potential measurements, electron microscopy, atomic force microscopy, and static light scattering measurements, to characterize the aggregates of TasA and to compare them with colloidal aggregates. We further studied the aggregation of TasA in the presence of negatively charged nanoparticles and showed that nanoparticles co-aggregated with TasA, and that the co-aggregation was hindered sterically. Based on these studies, we concluded that, similarly to colloidal aggregation, TasA aggregation occurs due to surface potential modulations and that the aggregation is followed by a rearrangement process. Shedding light on the aggregation mechanism of TasA, our results can be used for the design of TasA aggregation inhibitors and promoters.
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Affiliation(s)
- David N Azulay
- Institute of Chemistry, The Hebrew University of Jerusalem and The Center for Nanoscience and Nanotechnology, Edmond J. Safra Campus, Jerusalem 91904, Israel.
| | - Mnar Ghrayeb
- Institute of Chemistry, The Hebrew University of Jerusalem and The Center for Nanoscience and Nanotechnology, Edmond J. Safra Campus, Jerusalem 91904, Israel.
| | - Ilanit Bensimhon Ktorza
- Institute of Chemistry, The Hebrew University of Jerusalem and The Center for Nanoscience and Nanotechnology, Edmond J. Safra Campus, Jerusalem 91904, Israel.
| | - Ido Nir
- The Israel Institute for Biological Research, Ness Ziona, Israel
| | - Rinad Nasser
- Institute of Chemistry, The Hebrew University of Jerusalem and The Center for Nanoscience and Nanotechnology, Edmond J. Safra Campus, Jerusalem 91904, Israel.
| | - Yair S Harel
- Institute of Chemistry, The Hebrew University of Jerusalem and The Center for Nanoscience and Nanotechnology, Edmond J. Safra Campus, Jerusalem 91904, Israel.
| | - Liraz Chai
- Institute of Chemistry, The Hebrew University of Jerusalem and The Center for Nanoscience and Nanotechnology, Edmond J. Safra Campus, Jerusalem 91904, Israel.
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20
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Lacerna NM, Ramones CMV, Robes JMD, Picart MRD, Tun JO, Miller BW, Haygood MG, Schmidt EW, Salvador-Reyes LA, Concepcion GP. Inhibition of Biofilm Formation by Modified Oxylipins from the Shipworm Symbiont Teredinibacter turnerae. Mar Drugs 2020; 18:md18120656. [PMID: 33419303 PMCID: PMC7766104 DOI: 10.3390/md18120656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/13/2020] [Accepted: 12/16/2020] [Indexed: 11/16/2022] Open
Abstract
The bioactivity-guided purification of the culture broth of the shipworm endosymbiont Teredinibacter turnerae strain 991H.S.0a.06 yielded a new fatty acid, turneroic acid (1), and two previously described oxylipins (2–3). Turneroic acid (1) is an 18-carbon fatty acid decorated by a hydroxy group and an epoxide ring. Compounds 1–3 inhibited bacterial biofilm formation in Staphylococcus epidermidis, while only 3 showed antimicrobial activity against planktonic S. epidermidis. Comparison of the bioactivity of 1–3 with structurally related compounds indicated the importance of the epoxide moiety for selective and potent biofilm inhibition.
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Affiliation(s)
- Noel M. Lacerna
- The Marine Science Institute, University of the Philippines Diliman, Quezon City 1101, Philippines; (N.M.I.II); (C.M.V.R.); (J.M.D.R.); (M.R.D.P.); (J.O.T.); (L.A.S.-R.)
| | - Cydee Marie V. Ramones
- The Marine Science Institute, University of the Philippines Diliman, Quezon City 1101, Philippines; (N.M.I.II); (C.M.V.R.); (J.M.D.R.); (M.R.D.P.); (J.O.T.); (L.A.S.-R.)
| | - Jose Miguel D. Robes
- The Marine Science Institute, University of the Philippines Diliman, Quezon City 1101, Philippines; (N.M.I.II); (C.M.V.R.); (J.M.D.R.); (M.R.D.P.); (J.O.T.); (L.A.S.-R.)
| | - Myra Ruth D. Picart
- The Marine Science Institute, University of the Philippines Diliman, Quezon City 1101, Philippines; (N.M.I.II); (C.M.V.R.); (J.M.D.R.); (M.R.D.P.); (J.O.T.); (L.A.S.-R.)
| | - Jortan O. Tun
- The Marine Science Institute, University of the Philippines Diliman, Quezon City 1101, Philippines; (N.M.I.II); (C.M.V.R.); (J.M.D.R.); (M.R.D.P.); (J.O.T.); (L.A.S.-R.)
| | - Bailey W. Miller
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, UT 84112, USA; (B.W.M.); (M.G.H.); (E.W.S.)
| | - Margo G. Haygood
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, UT 84112, USA; (B.W.M.); (M.G.H.); (E.W.S.)
| | - Eric W. Schmidt
- Department of Medicinal Chemistry, University of Utah, Salt Lake City, UT 84112, USA; (B.W.M.); (M.G.H.); (E.W.S.)
| | - Lilibeth A. Salvador-Reyes
- The Marine Science Institute, University of the Philippines Diliman, Quezon City 1101, Philippines; (N.M.I.II); (C.M.V.R.); (J.M.D.R.); (M.R.D.P.); (J.O.T.); (L.A.S.-R.)
| | - Gisela P. Concepcion
- The Marine Science Institute, University of the Philippines Diliman, Quezon City 1101, Philippines; (N.M.I.II); (C.M.V.R.); (J.M.D.R.); (M.R.D.P.); (J.O.T.); (L.A.S.-R.)
- Correspondence: ; Tel.: +632-8275-2877
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21
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Said MS, Navale GR, Yadav A, Khonde N, Shinde SS, Jha A. Effect of tert-alcohol functional imidazolium salts on oligomerization and fibrillization of amyloid β (1–42) peptide. Biophys Chem 2020; 267:106480. [DOI: 10.1016/j.bpc.2020.106480] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 09/17/2020] [Accepted: 09/18/2020] [Indexed: 12/23/2022]
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22
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Pruteanu M, Hernández Lobato JI, Stach T, Hengge R. Common plant flavonoids prevent the assembly of amyloid curli fibres and can interfere with bacterial biofilm formation. Environ Microbiol 2020; 22:5280-5299. [PMID: 32869465 DOI: 10.1111/1462-2920.15216] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 08/25/2020] [Accepted: 08/27/2020] [Indexed: 01/01/2023]
Abstract
Like all macroorganisms, plants have to control bacterial biofilm formation on their surfaces. On the other hand, biofilms are highly tolerant against antimicrobial agents and other stresses. Consequently, biofilms are also involved in human chronic infectious diseases, which generates a strong demand for anti-biofilm agents. Therefore, we systematically explored major plant flavonoids as putative anti-biofilm agents using different types of biofilms produced by Gram-negative and Gram-positive bacteria. In Escherichia coli macrocolony biofilms, the flavone luteolin and the flavonols myricetin, morin and quercetin were found to strongly reduce the extracellular matrix. These agents directly inhibit the assembly of amyloid curli fibres by driving CsgA subunits into an off-pathway leading to SDS-insoluble oligomers. In addition, they can interfere with cellulose production by still unknown mechanisms. Submerged biofilm formation, however, is hardly affected. Moreover, the same flavonoids tend to stimulate macrocolony and submerged biofilm formation by Pseudomonas aeruginosa. For Bacillus subtilis, the flavonone naringenin and the chalcone phloretin were found to inhibit growth. Thus, plant flavonoids are not general anti-biofilm compounds but show species-specific effects. However, based on their strong and direct anti-amyloidogenic activities, distinct plant flavonoids may provide an attractive strategy to specifically combat amyloid-based biofilms of some relevant pathogens.
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Affiliation(s)
- Mihaela Pruteanu
- Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, Berlin, 10115, Germany
| | | | - Thomas Stach
- Institut für Biologie/Zoologie, Humboldt-Universität zu Berlin, Berlin, 10115, Germany
| | - Regine Hengge
- Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, Berlin, 10115, Germany
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Landry KS, Morey JM, Bharat B, Haney NM, Panesar SS. Biofilms-Impacts on Human Health and Its Relevance to Space Travel. Microorganisms 2020; 8:microorganisms8070998. [PMID: 32635371 PMCID: PMC7409192 DOI: 10.3390/microorganisms8070998] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/19/2020] [Accepted: 07/01/2020] [Indexed: 01/08/2023] Open
Abstract
As the world looks towards the stars, the impacts of endogenous and exogenous microorganisms on human health during long-duration space flight are subjects of increased interest within the space community. The presence and continued growth of bacterial biofilms about spacecraft has been documented for decades; however, the impact on crew health is in its infancy. The impacts of biofilms are well known in the medical, agricultural, commercial, and industrial spaces. It less known that biofilms are undermining many facets of space travel and that their effects need to be understood and addressed for future space missions. Biofilms can damage space crew health and spoil limited food supply. Yet, at the same time, they can benefit plant systems for food growth, nutrient development, and other biological systems that are being explored for use in space travel. Various biofilm removal techniques have been studied to mitigate the hazards posed by biofilm persistence during space travel. Because the presence of biofilms can advance or hinder humanity’s space exploration efforts, an understanding of their impacts over the duration of space flights is of paramount importance.
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Affiliation(s)
- Kyle S Landry
- Liberty Biosecurity, Expeditionary and Special Programs Division, Worcester, MA 01605, USA;
- Correspondence:
| | - Jose M Morey
- Liberty Biosecurity, Expeditionary and Special Programs Division, Worcester, MA 01605, USA;
| | - Bharat Bharat
- Department of Psychology, University of South Florida, St. Petersburg, FL 33620, USA;
| | - Nora M Haney
- Department of Urology, Johns Hopkins University, Baltimore, MD 21218, USA;
| | - Sandip S Panesar
- Department of Neurosurgery, Stanford University, Stanford, CA 94305, USA;
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Srivastava GN, Malwe AS, Sharma AK, Shastri V, Hibare K, Sharma VK. Molib: A machine learning based classification tool for the prediction of biofilm inhibitory molecules. Genomics 2020; 112:2823-2832. [DOI: 10.1016/j.ygeno.2020.03.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 03/14/2020] [Accepted: 03/22/2020] [Indexed: 10/24/2022]
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Barran-Berdon AL, Ocampo S, Haider M, Morales-Aparicio J, Ottenberg G, Kendall A, Yarmola E, Mishra S, Long JR, Hagen SJ, Stubbs G, Brady LJ. Enhanced purification coupled with biophysical analyses shows cross-β structure as a core building block for Streptococcus mutans functional amyloids. Sci Rep 2020; 10:5138. [PMID: 32198417 PMCID: PMC7083922 DOI: 10.1038/s41598-020-62115-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 02/14/2020] [Indexed: 11/10/2022] Open
Abstract
Streptococcus mutans is an etiologic agent of human dental caries that forms dental plaque biofilms containing functional amyloids. Three amyloidogenic proteins, P1, WapA, and Smu_63c were previously identified. C123 and AgA are naturally occurring amyloid-forming fragments of P1 and WapA, respectively. We determined that four amyloidophilic dyes, ThT, CDy11, BD-oligo, and MK-H4, differentiate C123, AgA, and Smu_63c amyloid from monomers, but non-specific binding to bacterial cells in the absence of amyloid precludes their utility for identifying amyloid in biofilms. Congo red-induced birefringence is a more specific indicator of amyloid formation and differentiates biofilms formed by wild-type S. mutans from a triple ΔP1/WapA/Smu_63c mutant with reduced biofilm forming capabilities. Amyloid accumulation is a late event, appearing in older S. mutans biofilms after 60 hours of growth. Amyloid derived from pure preparations of all three proteins is visualized by electron microscopy as mat-like structures. Typical amyloid fibers become evident following protease digestion to eliminate non-specific aggregates and monomers. Amyloid mats, similar in appearance to those reported in S. mutans biofilm extracellular matrices, are reconstituted by co-incubation of monomers and amyloid fibers. X-ray fiber diffraction of amyloid mats and fibers from all three proteins demonstrate patterns reflective of a cross-β amyloid structure.
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Affiliation(s)
- Ana L Barran-Berdon
- Department of Oral Biology, University of Florida, Gainesville, Florida, USA
| | - Sebastian Ocampo
- Department of Oral Biology, University of Florida, Gainesville, Florida, USA
| | - Momin Haider
- Department of Physics, University of Florida, Gainesville, Florida, USA
| | | | - Gregory Ottenberg
- Department of Oral Biology, University of Florida, Gainesville, Florida, USA
| | - Amy Kendall
- Department of Biological Sciences and Center for Structural Biology, Vanderbilt University, Nashville, Tennessee, USA
| | - Elena Yarmola
- Department of Oral Biology, University of Florida, Gainesville, Florida, USA
| | - Surabhi Mishra
- Department of Oral Biology, University of Florida, Gainesville, Florida, USA
| | - Joanna R Long
- Department of Biochemistry, University of Florida, Gainesville, Florida, USA
| | - Stephen J Hagen
- Department of Physics, University of Florida, Gainesville, Florida, USA
| | - Gerald Stubbs
- Department of Biological Sciences and Center for Structural Biology, Vanderbilt University, Nashville, Tennessee, USA
| | - L Jeannine Brady
- Department of Oral Biology, University of Florida, Gainesville, Florida, USA.
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Das S, Czuni L, Báló V, Papp G, Gazdag Z, Papp N, Kőszegi T. Cytotoxic Action of Artemisinin and Scopoletin on Planktonic Forms and on Biofilms of Candida Species. Molecules 2020; 25:E476. [PMID: 31979177 PMCID: PMC7038054 DOI: 10.3390/molecules25030476] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 01/08/2020] [Accepted: 01/20/2020] [Indexed: 12/12/2022] Open
Abstract
We investigated the antifungal activities of purified plant metabolites artemisinin (Ar) and scopoletin (Sc) including inhibition, effects on metabolic activities, viability, and oxidative stress on planktonic forms and on preformed biofilms of seven Candida species. The characteristic minimum inhibitory concentration (MIC90) of Ar and Sc against Candida species ranged from 21.83-142.1 µg/mL and 67.22-119.4 µg/mL, respectively. Drug concentrations causing ≈10% CFU decrease within 60 minutes of treatments were also determined (minimum effective concentration, MEC10) using 100-fold higher CFUs than in the case of MIC90 studies. Cytotoxic effects on planktonic and on mature biofilms of Candida species at MEC10 concentrations were further evaluated with fluorescent live/dead discrimination techniques. Candida glabrata, Candida guilliermondii, and Candida parapsilosis were the species most sensitive to Ar and Sc. Ar and Sc were also found to promote the accumulation of intracellular reactive oxygen species (ROS) by increasing oxidative stress at their respective MEC10 concentrations against the tested planktonic Candida species. Ar and Sc possess dose-dependent antifungal action but the underlying mechanism type (fungistatic and fungicidal) is not clear yet. Our data suggest that Ar and Sc found in herbal plants might have potential usage in the fight against Candida biofilms.
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Affiliation(s)
- Sourav Das
- Department of Laboratory Medicine, University of Pécs, Medical School, 7624 Pécs, Ifjúság u. 13., Hungary;
- János Szentágothai Research Center, University of Pécs, 7624 Pécs, Ifjúság u. 20., Hungary
| | - Lilla Czuni
- Department of General and Environmental Microbiology, Institute of Biology, University of Pécs, 7624 Pécs, Ifjúság u. 6., Hungary; (L.C.); (V.B.); (G.P.); (Z.G.)
- Microbial Biotechnology Research Group, János Szentágothai Research Center, University of Pécs, 7624 Pécs, Ifjúság u. 20., Hungary
| | - Viktória Báló
- Department of General and Environmental Microbiology, Institute of Biology, University of Pécs, 7624 Pécs, Ifjúság u. 6., Hungary; (L.C.); (V.B.); (G.P.); (Z.G.)
| | - Gábor Papp
- Department of General and Environmental Microbiology, Institute of Biology, University of Pécs, 7624 Pécs, Ifjúság u. 6., Hungary; (L.C.); (V.B.); (G.P.); (Z.G.)
- Microbial Biotechnology Research Group, János Szentágothai Research Center, University of Pécs, 7624 Pécs, Ifjúság u. 20., Hungary
| | - Zoltán Gazdag
- Department of General and Environmental Microbiology, Institute of Biology, University of Pécs, 7624 Pécs, Ifjúság u. 6., Hungary; (L.C.); (V.B.); (G.P.); (Z.G.)
- Microbial Biotechnology Research Group, János Szentágothai Research Center, University of Pécs, 7624 Pécs, Ifjúság u. 20., Hungary
| | - Nóra Papp
- Department of Pharmacognosy, University of Pécs, Faculty of Pharmacy, 7624 Pécs, Rókus u. 2, Hungary
| | - Tamás Kőszegi
- Department of Laboratory Medicine, University of Pécs, Medical School, 7624 Pécs, Ifjúság u. 13., Hungary;
- János Szentágothai Research Center, University of Pécs, 7624 Pécs, Ifjúság u. 20., Hungary
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Papadopoulou A, Dalsgaard I, Wiklund T. Inhibition Activity of Compounds and Bacteriophages against Flavobacterium psychrophilum Biofilms In Vitro. JOURNAL OF AQUATIC ANIMAL HEALTH 2019; 31:225-238. [PMID: 31216387 DOI: 10.1002/aah.10069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 03/24/2019] [Indexed: 06/09/2023]
Abstract
Flavobacterium psychrophilum produces biofilms under laboratory conditions, and it has been inconclusively suggested that F. psychrophilum biofilms can be a potential reservoir for transmission of the pathogen to a fish population under fish farming conditions. Therefore, there is a need for anti-biofilm compounds. The main aim of this study was to determine the anti-biofilm properties of certain compounds and bacteriophages on F. psychrophilum biofilms under static conditions using a standard 96-well microtiter plate biofilm assay in vitro. Eight compounds (A-type proanthocyanidins, D-leucine, EDTA, emodin, fucoidan, L-alliin, parthenolide, and 2-aminoimidazole) at three sub-minimum inhibitory concentrations (sub-MICs), four bacteriophages (Fpv-3, Fpv-9, Fpv-10, and Fpv-21), and a phage combination (Fpv-9 + Fpv-10) were tested for inhibition of biofilm formation and reduction of the biomass of mature biofilms formed by two smooth isolates (P7-9/10 and P1-10B/10) and two rough isolates (P7-9/2R/10 and P1-10B/2R/10) of F. psychrophilum. The crystal violet staining method was used to stain the biofilms. Most of the compounds at sub-MICs inhibited the biofilm formation of mainly smooth isolates, attaining up to 80% inhibition. Additionally, the same reduction trend was also observed for 2-aminoimidazole, emodin, parthenolide, and D-leucine on the biomass of mature biofilms in a concentration-dependent manner. The anti-biofilm properties of the compounds are believed to lie in their ability to disturb the cellular interactions during biofilm formation and probably to cause cell dispersal in already formed biofilms. Lytic bacteriophages efficiently inhibited biofilm formation of F. psychrophilum, while they partially reduced the biomass of mature biofilms. However, the phage combination (Fpv-9 + Fpv-10) showed a successful reduction in the biomass of F. psychrophilum mature biofilms. We conclude that inhibiting compounds together with bacteriophages may supplement the use of disinfectants against bacterial biofilms (e.g., F. psychrophilum biofilms), leading to a reduced occurrence of bacterial coldwater disease outbreaks at fish farms.
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Affiliation(s)
- Anna Papadopoulou
- Laboratory of Aquatic Pathobiology, Environmental and Marine Biology, Åbo Akademi University, Tykistokatu 6, FI-20520, Turku, Finland
| | - Inger Dalsgaard
- National Institute of Aquatic Resources, Technical University of Denmark, 2800, Kongens Lyngby, Denmark
| | - Tom Wiklund
- Laboratory of Aquatic Pathobiology, Environmental and Marine Biology, Åbo Akademi University, Tykistokatu 6, FI-20520, Turku, Finland
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Structural Insights into Curli CsgA Cross-β Fibril Architecture Inspire Repurposing of Anti-amyloid Compounds as Anti-biofilm Agents. PLoS Pathog 2019; 15:e1007978. [PMID: 31469892 PMCID: PMC6748439 DOI: 10.1371/journal.ppat.1007978] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 09/17/2019] [Accepted: 07/11/2019] [Indexed: 12/14/2022] Open
Abstract
Curli amyloid fibrils secreted by Enterobacteriaceae mediate host cell adhesion and contribute to biofilm formation, thereby promoting bacterial resistance to environmental stressors. Here, we present crystal structures of amyloid-forming segments from the major curli subunit, CsgA, revealing steric zipper fibrils of tightly mated β-sheets, demonstrating a structural link between curli and human pathological amyloids. D-enantiomeric peptides, originally developed to interfere with Alzheimer's disease-associated amyloid-β, inhibited CsgA fibrillation and reduced biofilm formation in Salmonella typhimurium. Moreover, as previously shown, CsgA fibrils cross-seeded fibrillation of amyloid-β, providing support for the proposed structural resemblance and potential for cross-species amyloid interactions. The presented findings provide structural insights into amyloidogenic regions important for curli formation, suggest a novel strategy for disrupting amyloid-structured biofilms, and hypothesize on the formation of self-propagating prion-like species originating from a microbial source that could influence neurodegenerative diseases.
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29
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Mixed Borrelia burgdorferi and Helicobacter pylori Biofilms in Morgellons Disease Dermatological Specimens. Healthcare (Basel) 2019; 7:healthcare7020070. [PMID: 31108976 PMCID: PMC6627092 DOI: 10.3390/healthcare7020070] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 04/17/2019] [Accepted: 05/14/2019] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Morgellons disease (MD) is a dermopathy that is associated with tick-borne illness. It is characterized by spontaneously developing skin lesions containing embedded or projecting filaments, and patients may also experience symptoms resembling those of Lyme disease (LD) including musculoskeletal, neurological and cardiovascular manifestations. Various species of Borrelia and co-infecting pathogens have been detected in body fluids and tissue specimens from MD patients. We sought to investigate the coexistence of Borrelia burgdorferi (Bb) and Helicobacter pylori (Hp) in skin specimens from MD subjects, and to characterize their association with mixed amyloid biofilm development. METHODS Testing for Bb and Hp was performed on dermatological specimens from 14 MD patients using tissue culture, immunohistochemical (IHC) staining, polymerase chain reaction (PCR) testing, fluorescent in situ hybridization (FISH) and confocal microscopy. Markers for amyloid and biofilm formation were investigated using histochemical and IHC staining. RESULTS Bb and Hp were detected in dermatological tissue taken from MD lesions. Bb and Hp tended to co-localize in foci within the epithelial tissue. Skin sections exhibiting foci of co-infecting Bb and Hp contained amyloid markers including β-amyloid protein, thioflavin and phosphorylated tau. The biofilm marker alginate was also found in the sections. CONCLUSIONS Mixed Bb and Hp biofilms containing β-amyloid and phosphorylated tau may play a role in the evolution of MD.
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30
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Wang Y, Kadiyala U, Qu Z, Elvati P, Altheim C, Kotov NA, Violi A, VanEpps JS. Anti-Biofilm Activity of Graphene Quantum Dots via Self-Assembly with Bacterial Amyloid Proteins. ACS NANO 2019; 13:4278-4289. [PMID: 30912922 PMCID: PMC6528478 DOI: 10.1021/acsnano.8b09403] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Bacterial biofilms represent an essential part of Earth's ecosystem that can cause multiple ecological, technological, and health problems. The environmental resilience and sophisticated organization of biofilms are enabled by the extracellular matrix that creates a protective network of biomolecules around the bacterial community. Current anti-biofilm agents can interfere with extracellular matrix production but, being based on small molecules, are degraded by bacteria and rapidly diffuse away from biofilms. Both factors severely reduce their efficacy, while their toxicity to higher organisms creates additional barriers to their practicality. In this paper, we report on the ability of graphene quantum dots to effectively disperse mature amyloid-rich Staphylococcus aureus biofilms, interfering with the self-assembly of amyloid fibers, a key structural component of the extracellular matrix. Mimicking peptide-binding biomolecules, graphene quantum dots form supramolecular complexes with phenol-soluble modulins, the peptide monomers of amyloid fibers. Experimental and computational results show that graphene quantum dots efficiently dock near the N-terminus of the peptide and change the secondary structure of phenol-soluble modulins, which disrupts their fibrillation and represents a strategy for mitigation of bacterial communities.
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Affiliation(s)
- Yichun Wang
- Department of Chemical Engineering, Ann Arbor, MI 48109 USA
- Biointerfaces Institute University of Michigan, Ann Arbor, MI 48109 USA
| | - Usha Kadiyala
- Department of Emergency Medicine, Ann Arbor, MI 48109 USA
| | - Zhibei Qu
- Department of Chemical Engineering, Ann Arbor, MI 48109 USA
- Biointerfaces Institute University of Michigan, Ann Arbor, MI 48109 USA
| | - Paolo Elvati
- Department of Mechanical Engineering, Ann Arbor, MI 48109 USA
| | | | - Nicholas A. Kotov
- Department of Chemical Engineering, Ann Arbor, MI 48109 USA
- Biointerfaces Institute University of Michigan, Ann Arbor, MI 48109 USA
- Department of Biomedical Engineering, Ann Arbor, MI 48109 USA
- Department of Materials Science and Engineering, Ann Arbor, MI 48109 USA
- Department of Macromolecular Science and Engineering, Ann Arbor, MI 48109 USA
- Michigan Center for Integrative Research in Critical Care, Ann Arbor, MI 48109 USA
| | - Angela Violi
- Department of Chemical Engineering, Ann Arbor, MI 48109 USA
- Department of Mechanical Engineering, Ann Arbor, MI 48109 USA
- Department of Materials Science and Engineering, Ann Arbor, MI 48109 USA
- Biophysics Program, University of Michigan, Ann Arbor, MI 48109 USA
| | - J. Scott VanEpps
- Biointerfaces Institute University of Michigan, Ann Arbor, MI 48109 USA
- Department of Emergency Medicine, Ann Arbor, MI 48109 USA
- Department of Biomedical Engineering, Ann Arbor, MI 48109 USA
- Department of Macromolecular Science and Engineering, Ann Arbor, MI 48109 USA
- Michigan Center for Integrative Research in Critical Care, Ann Arbor, MI 48109 USA
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Erskine E, MacPhee CE, Stanley-Wall NR. Functional Amyloid and Other Protein Fibers in the Biofilm Matrix. J Mol Biol 2018; 430:3642-3656. [PMID: 30098341 PMCID: PMC6173796 DOI: 10.1016/j.jmb.2018.07.026] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 07/17/2018] [Accepted: 07/24/2018] [Indexed: 02/06/2023]
Abstract
Biofilms are ubiquitous in the natural and man-made environment. They are defined as microbes that are encapsulated in an extracellular, self-produced, biofilm matrix. Growing evidence from the genetic and biochemical analysis of single species biofilms has linked the presence of fibrous proteins to a functional biofilm matrix. Some of these fibers have been described as functional amyloid or amyloid-like fibers. Here we provide an overview of the biophysical and biological data for a wide range of protein fibers found in the biofilm matrix of Gram-positive and Gram-negative bacteria.
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Affiliation(s)
- Elliot Erskine
- Division of Molecular Microbiology, School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK
| | - Cait E MacPhee
- James Clerk Maxwell Building, School of Physics, University of Edinburgh, The Kings Buildings, Mayfield Road, Edinburgh, EH9 3JZ, UK.
| | - Nicola R Stanley-Wall
- Division of Molecular Microbiology, School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK.
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32
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Parai D, Banerjee M, Dey P, Chakraborty A, Islam E, Mukherjee SK. Effect of reserpine on Pseudomonas aeruginosa quorum sensing mediated virulence factors and biofilm formation. BIOFOULING 2018; 34:320-334. [PMID: 29482361 DOI: 10.1080/08927014.2018.1437910] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 02/01/2018] [Indexed: 06/08/2023]
Abstract
This study aimed to evaluate the effect of reserpine, a plant-derived indole-alkaloid, against Pseudomonas aeruginosa PAO1 biofilms. The anti-biofilm activity of reserpine was evaluated by crystal violet staining, MTT assay, confocal laser scanning microscopy and scanning electron microscopy. Reserpine effects were also assessed by qRT-PCR of quorum sensing (QS)-regulated genes and biochemical quantification of the QS-mediated virulence factors pyocyanin, rhamnolipids, proteases and elastases. Reserpine reduced biofilm formation, cell motility, virulence factor production, and QS-controlled gene expression. Additionally, molecular docking analysis for AHL synthase LasI and QS transcriptional regulators LasR/MvfR revealed a plausible molecular mechanisms of reserpine QS inhibition. These findings provide insights into the underlying mode of action of reserpine, which may be useful in the development of new drugs against biofilm-related infections.
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Affiliation(s)
- Debaprasad Parai
- a Department of Microbiology , University of Kalyani , Kalyani , India
| | - Malabika Banerjee
- a Department of Microbiology , University of Kalyani , Kalyani , India
| | - Pia Dey
- a Department of Microbiology , University of Kalyani , Kalyani , India
| | | | - Ekramul Islam
- a Department of Microbiology , University of Kalyani , Kalyani , India
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Romero CM, Martorell PV, López AG, Peñalver CGN, Chaves S, Mechetti M. Architecture and physicochemical characterization of Bacillus biofilm as a potential enzyme immobilization factory. Colloids Surf B Biointerfaces 2017; 162:246-255. [PMID: 29216511 DOI: 10.1016/j.colsurfb.2017.11.057] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 11/09/2017] [Accepted: 11/22/2017] [Indexed: 11/18/2022]
Abstract
Biocatalysis for industrial application is based on the use of enzymes to perform complex transformations. However, these systems have some disadvantage related to the costs of the biocatalyst. In this work, an alternative strategy for producing green immobilized biocatalysts based on biofilm was developed.A study of the rheological behavior of the biofilm from Bacillus sp. Mcn4, as well as the determination of its composition, was carried out. The dynamic rheological measurements, viscosity (G") and elasticity (G') module, showed that the biofilm presents appreciable elastic components, which is a recognized property for enzymes immobilization. After the partial purification, the exopolysaccharidewas identified as a levan with a non-Newtonian behavior. Extracellular DNA with fragments between 10,000 and 1000bp was detected also in the biofilm, and amyloid protein in the extracellular matrix using a fluorescence technique was identified. Bacillus sp. Mcn4 biofilms were developed on different surfaces, being the most stable those developed on hydrophilic supports. The biofilm showed lipase activity suggesting the presence of constitutive lipases entrapped into the biofilm. Indeed, two enzymes with lipase activity were identified in native PAGE. These were used as biocatalysts, whose reuse showed a residual lipase activity after more than one cycle of catalysis. The components identified in the biofilm could be the main contributors of the rheological characteristic of this material, giving an exceptional environment to the lipase enzyme. Based on these findings, the current study proposes green and natural biopolymers matrix as support for the enzyme immobilization for industrial applications.
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Affiliation(s)
- C M Romero
- PROIMI, PROIMI-CONICET, Av. Belgrano y Pasaje Caseros, T4001 MVB, Tucumán Fac. Bioq., Qca. y Farmacia (UNT), Ayacucho 471, 4000, Tucumán, Argentina.
| | - P V Martorell
- PROIMI, PROIMI-CONICET, Av. Belgrano y Pasaje Caseros, T4001 MVB, Tucumán Fac. Bioq., Qca. y Farmacia (UNT), Ayacucho 471, 4000, Tucumán, Argentina
| | - A Gómez López
- Laboratorio de Física de Fluidos y Electrorreología, Instituto de Física del Noroeste Argentino-INFINOA (CONICET-UNT), Facultad de Ciencias Exactas y Tecnología, Universidad Nacional de Tucumán, Av. Independencia 1800, San Miguel de Tucumán, 4000, Argentina
| | - C G Nieto Peñalver
- PROIMI, PROIMI-CONICET, Av. Belgrano y Pasaje Caseros, T4001 MVB, Tucumán Fac. Bioq., Qca. y Farmacia (UNT), Ayacucho 471, 4000, Tucumán, Argentina
| | - S Chaves
- Instituto Superior de Investigaciones Biológicas (INSIBIO), CONICET-UNT, Instituto de Química Biológica "Dr. Bernabé Bloj", Facultad de Bioquímica, Química y Farmacia, UNT. Chacabuco 461, T4000ILI, San Miguel de Tucumán, Argentina
| | - M Mechetti
- Laboratorio de Física de Fluidos y Electrorreología, Instituto de Física del Noroeste Argentino-INFINOA (CONICET-UNT), Facultad de Ciencias Exactas y Tecnología, Universidad Nacional de Tucumán, Av. Independencia 1800, San Miguel de Tucumán, 4000, Argentina
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Wang B, Pilkington EH, Sun Y, Davis TP, Ke PC, Ding F. Modulating protein amyloid aggregation with nanomaterials. ENVIRONMENTAL SCIENCE. NANO 2017; 4:1772-1783. [PMID: 29230295 PMCID: PMC5722024 DOI: 10.1039/c7en00436b] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Direct exposure or intake of nanopaticles (NPs) to the human body can invoke a series of biological responses, some of which are deleterious, and as such the role of NPs in vivo requires thorough examination. Over the past decade, it has been established that biomolecules such as proteins can bind NPs to form a 'corona', where the structures and dynamics of NP-associated proteins can assign new functionality, systemic distribution and toxicity. However, the behavior and fate of NPs in biological systems are still far from being fully understood. Growing evidence has shown that some natural or artificial NPs could either up- or down-regulate protein amyloid aggregation, which is associated with neurodegenerative diseases like Alzheimer's and Parkinson's diseases, as well as metabolic diseases such as type 2 diabetes. These effects can be either indirect (e.g., through a crowding effect) or direct, depending on the NP composition, size, shape and surface chemistry. However, efforts to design anti-amyloid NPs for biomedical applications have been largely hindered by insufficient understanding of the complex processes, even though proof-of-concept experiments have been conducted. Therefore, exploring the general mechanisms of NP-meditated protein aggregation marks an emerging field in bio-nano research and a new stage of handling nanotechnology that not only aids in elucidating the origin of nanotoxicity, but also provides a foundation for engineering de novo anti-amyloid nanomedicines. In this review, we summarize research on NP-mediated protein amyloid aggregation, with the goal of contributing to sustained nanotechnology and safe nanomedicine against amyloid diseases.
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Affiliation(s)
- Bo Wang
- Department of Physics and Astronomy, Clemson University, Clemson, SC, USA
| | - Emily H Pilkington
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade Parkville, VIC 3052, Australia
| | - Yunxiang Sun
- Department of Physics and Astronomy, Clemson University, Clemson, SC, USA
| | - Thomas P Davis
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade Parkville, VIC 3052, Australia
- Department of Chemistry, University of Warwick, Gibbet Hill, Coventry, CV4 7AL, UK
| | - Pu Chun Ke
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade Parkville, VIC 3052, Australia
| | - Feng Ding
- Department of Physics and Astronomy, Clemson University, Clemson, SC, USA
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35
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Abstract
Bacteria in nature reside in organized communities, termed biofilms, which are composed of multiple individual cells adhering to each other. Similarly, tumors are a multicellular mass with distinct cellular phenotypes. Both tumors and biofilms are considered to be an active interphase between unicellular and multicellular life states. Because both of these units depend on glutamine for growth and survival, we review here glutamine flux within them as a readout for intra- and inter-commensal metabolism. We suggest that the difference between glutamine fluxes in these cellular communities lies mainly in their global multicellular metabolic organization. Both the differences and similarities described here should be taken into account when considering glutamine-targeting therapeutic approaches.
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Affiliation(s)
- Ayelet Erez
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot, Israel.
| | - Ilana Kolodkin-Gal
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel.
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36
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Dragoš A, Kovács ÁT, Claessen D. The Role of Functional Amyloids in Multicellular Growth and Development of Gram-Positive Bacteria. Biomolecules 2017; 7:biom7030060. [PMID: 28783117 PMCID: PMC5618241 DOI: 10.3390/biom7030060] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 08/01/2017] [Accepted: 08/03/2017] [Indexed: 01/15/2023] Open
Abstract
Amyloid fibrils play pivotal roles in all domains of life. In bacteria, these fibrillar structures are often part of an extracellular matrix that surrounds the producing organism and thereby provides protection to harsh environmental conditions. Here, we discuss the role of amyloid fibrils in the two distant Gram-positive bacteria, Streptomyces coelicolor and Bacillus subtilis. We describe how amyloid fibrils contribute to a multitude of developmental processes in each of these systems, including multicellular growth and community development. Despite this variety of tasks, we know surprisingly little about how their assembly is organized to fulfill all these roles.
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Affiliation(s)
- Anna Dragoš
- Terrestrial Biofilms Group, Institute of Microbiology, Friedrich Schiller University Jena, 07743 Jena, Germany.
| | - Ákos T Kovács
- Department of Biotechnology and Biomedicine, Technical University of Denmark, 2800 Lyngby, Denmark.
| | - Dennis Claessen
- Institute of Biology, Leiden University, 2333BE Leiden, The Netherlands.
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37
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Bridier A, Piard JC, Pandin C, Labarthe S, Dubois-Brissonnet F, Briandet R. Spatial Organization Plasticity as an Adaptive Driver of Surface Microbial Communities. Front Microbiol 2017; 8:1364. [PMID: 28775718 PMCID: PMC5517491 DOI: 10.3389/fmicb.2017.01364] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 07/05/2017] [Indexed: 01/08/2023] Open
Abstract
Biofilms are dynamic habitats which constantly evolve in response to environmental fluctuations and thereby constitute remarkable survival strategies for microorganisms. The modulation of biofilm functional properties is largely governed by the active remodeling of their three-dimensional structure and involves an arsenal of microbial self-produced components and interconnected mechanisms. The production of matrix components, the spatial reorganization of ecological interactions, the generation of physiological heterogeneity, the regulation of motility, the production of actives enzymes are for instance some of the processes enabling such spatial organization plasticity. In this contribution, we discussed the foundations of architectural plasticity as an adaptive driver of biofilms through the review of the different microbial strategies involved. Moreover, the possibility to harness such characteristics to sculpt biofilm structure as an attractive approach to control their functional properties, whether beneficial or deleterious, is also discussed.
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Affiliation(s)
- Arnaud Bridier
- Antibiotics, Biocides, Residues and Resistance Unit, Fougères Laboratory, ANSESFougères, France
| | - Jean-Christophe Piard
- Micalis Institute, INRA, AgroParisTech, Université Paris-SaclayJouy-en-Josas, France
| | - Caroline Pandin
- Micalis Institute, INRA, AgroParisTech, Université Paris-SaclayJouy-en-Josas, France
| | - Simon Labarthe
- MaIAGE, INRA, Université Paris-SaclayJouy-en-Josas, France
| | | | - Romain Briandet
- Micalis Institute, INRA, AgroParisTech, Université Paris-SaclayJouy-en-Josas, France
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38
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Besingi RN, Wenderska IB, Senadheera DB, Cvitkovitch DG, Long JR, Wen ZT, Brady LJ. Functional amyloids in Streptococcus mutans, their use as targets of biofilm inhibition and initial characterization of SMU_63c. MICROBIOLOGY-SGM 2017; 163:488-501. [PMID: 28141493 DOI: 10.1099/mic.0.000443] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Amyloids have been identified as functional components of the extracellular matrix of bacterial biofilms. Streptococcus mutans is an established aetiologic agent of dental caries and a biofilm dweller. In addition to the previously identified amyloidogenic adhesin P1 (also known as AgI/II, PAc), we show that the naturally occurring antigen A derivative of S. mutans wall-associated protein A (WapA) and the secreted protein SMU_63c can also form amyloid fibrils. P1, WapA and SMU_63c were found to significantly influence biofilm development and architecture, and all three proteins were shown by immunogold electron microscopy to reside within the fibrillar extracellular matrix of the biofilms. We also showed that SMU_63c functions as a negative regulator of biofilm cell density and genetic competence. In addition, the naturally occurring C-terminal cleavage product of P1, C123 (also known as AgII), was shown to represent the amyloidogenic moiety of this protein. Thus, P1 and WapA both represent sortase substrates that are processed to amyloidogenic truncation derivatives. Our current results suggest a novel mechanism by which certain cell surface adhesins are processed and contribute to the amyloidogenic capability of S. mutans. We further demonstrate that the polyphenolic small molecules tannic acid and epigallocatechin-3-gallate, and the benzoquinone derivative AA-861, which all inhibit amyloid fibrillization of C123 and antigen A in vitro, also inhibit S. mutans biofilm formation via P1- and WapA-dependent mechanisms, indicating that these proteins serve as therapeutic targets of anti-amyloid compounds.
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Affiliation(s)
- Richard N Besingi
- Department of Oral Biology, University of Florida, Gainesville, FL, USA
| | - Iwona B Wenderska
- Department of Oral Microbiology, Faculty of Dentistry, University of Toronto, Toronto, ON, Canada
| | - Dilani B Senadheera
- Department of Oral Microbiology, Faculty of Dentistry, University of Toronto, Toronto, ON, Canada
| | - Dennis G Cvitkovitch
- Department of Oral Microbiology, Faculty of Dentistry, University of Toronto, Toronto, ON, Canada
| | - Joanna R Long
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, FL, USA
| | - Zezhang T Wen
- Department of Comprehensive Dentistry and Biomaterials and Center of Excellence in Oral and Craniofacial Biology, Louisiana State University Health Sciences Center, New Orleans, LA, USA.,Department of Microbiology, Immunology and Parasitology, Louisiana State University Health Sciences Center, New Orleans, LA, USA
| | - L Jeannine Brady
- Department of Oral Biology, University of Florida, Gainesville, FL, USA
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39
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Advanced acuity in microbial biofilm genesis, development, associated clinical infections and control. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.antinf.2017.01.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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40
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Abstract
Recent insights into bacterial biofilm matrix structures have induced a paradigm shift toward the recognition of amyloid fibers as common building block structures that confer stability to the exopolysaccharide matrix. Here we describe the functional amyloid systems related to biofilm matrix formation in both Gram-negative and Gram-positive bacteria and recent knowledge regarding the interaction of amyloids with other biofilm matrix components such as extracellular DNA (eDNA) and the host immune system. In addition, we summarize the efforts to identify compounds that target amyloid fibers for therapeutic purposes and recent developments that take advantage of the amyloid structure to engineer amyloid fibers of bacterial biofilm matrices for biotechnological applications.
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41
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Serra DO, Mika F, Richter AM, Hengge R. The green tea polyphenol EGCG inhibits E. coli biofilm formation by impairing amyloid curli fibre assembly and downregulating the biofilm regulator CsgD via the σ(E) -dependent sRNA RybB. Mol Microbiol 2016; 101:136-51. [PMID: 26992034 DOI: 10.1111/mmi.13379] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/16/2016] [Indexed: 01/17/2023]
Abstract
In bacterial biofilms, which are often involved in chronic infections, cells are surrounded by a self-produced extracellular matrix that contains amyloid fibres, exopolysaccharides and other biopolymers. The matrix contributes to the pronounced resistance of biofilms against antibiotics and host immune systems. Being highly inflammatory, matrix amyloids such as curli fibres of Escherichia coli can also play a role in pathogenicity. Using macrocolony biofilms of commensal and pathogenic E. coli as a model system, we demonstrate here that the green tea polyphenol epigallocatachin gallate (EGCG) is a potent antibiofilm agent. EGCG virtually eliminates the biofilm matrix by directly interfering with the assembly of curli subunits into amyloid fibres, and by triggering the σ(E) cell envelope stress response and thereby reducing the expression of CsgD - a crucial activator of curli and cellulose biosynthesis - due to csgD mRNA targeting by the σ(E) -dependent sRNA RybB. These findings highlight EGCG as a potential adjuvant for antibiotic therapy of biofilm-associated infections. Moreover, EGCG may support therapies against pathogenic E. coli that produce inflammatory curli fibres along with Shigatoxin.
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Affiliation(s)
- Diego O Serra
- Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, 10115, Berlin, Germany
| | - Franziska Mika
- Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, 10115, Berlin, Germany
| | - Anja M Richter
- Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, 10115, Berlin, Germany
| | - Regine Hengge
- Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, 10115, Berlin, Germany
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42
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Abstract
In the biofilm form, bacteria are more resistant to various antimicrobial treatments. Bacteria in a biofilm can also survive harsh conditions and withstand the host's immune system. Therefore, there is a need for new treatment options to treat biofilm-associated infections. Currently, research is focused on the development of antibiofilm agents that are nontoxic, as it is believed that such molecules will not lead to future drug resistance. In this review, we discuss recent discoveries of antibiofilm agents and different approaches to inhibit/disperse biofilms. These new antibiofilm agents, which contain moieties such as imidazole, phenols, indole, triazole, sulfide, furanone, bromopyrrole, peptides, etc. have the potential to disperse bacterial biofilms in vivo and could positively impact human medicine in the future.
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43
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Turonova H, Neu TR, Ulbrich P, Pazlarova J, Tresse O. The biofilm matrix of Campylobacter jejuni determined by fluorescence lectin-binding analysis. BIOFOULING 2016; 32:597-608. [PMID: 27097059 DOI: 10.1080/08927014.2016.1169402] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Campylobacter jejuni is responsible for the most common bacterial foodborne gastroenteritis. Despite its fastidious growth, it can survive harsh conditions through biofilm formation. In this work, fluorescence lectin-binding analysis was used to determine the glycoconjugates present in the biofilm matrix of two well-described strains. Screening of 72 lectins revealed strain-specific patterns with six lectins interacting with the biofilm matrix of both strains. The most common sugar moiety contained galactose and N-acetylgalactosamine. Several lectins interacted with N-acetylglucosamine and sialic acid, probably originated from the capsular polysaccharides, lipooligosaccharides and N-glycans of C. jejuni. In addition, glycoconjugates containing mannose and fucose were detected within the biofilm, which have not previously been found in the C. jejuni envelope. Detection of thioflavin T and curcumin highlighted the presence of amyloids in the cell envelope without association with specific cell appendages. The lectins ECA, GS-I, HMA and LEA constitute a reliable cocktail to detect the biofilm matrix of C. jejuni.
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Affiliation(s)
- Hana Turonova
- a Department of Microbiology & Food Chain , SECALIM UMR1014, INRA , Nantes , France
- b LUNAM Université, Oniris, Université de Nantes , Nantes , France
- c Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology , University of Chemistry and Technology , Prague , Czech Republic
| | - Thomas R Neu
- d Department of River Ecology , Helmholtz Centre for Environmental Research - UFZ , Magdeburg , Germany
| | - Pavel Ulbrich
- c Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology , University of Chemistry and Technology , Prague , Czech Republic
| | - Jarmila Pazlarova
- c Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology , University of Chemistry and Technology , Prague , Czech Republic
| | - Odile Tresse
- a Department of Microbiology & Food Chain , SECALIM UMR1014, INRA , Nantes , France
- b LUNAM Université, Oniris, Université de Nantes , Nantes , France
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44
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Saunders JC, Young LM, Mahood RA, Jackson MP, Revill CH, Foster RJ, Smith DA, Ashcroft AE, Brockwell DJ, Radford SE. An in vivo platform for identifying inhibitors of protein aggregation. Nat Chem Biol 2015; 12:94-101. [PMID: 26656088 PMCID: PMC4720988 DOI: 10.1038/nchembio.1988] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 10/30/2015] [Indexed: 02/07/2023]
Abstract
Protein aggregation underlies an array of human diseases, yet only one small-molecule therapeutic targeting this process has been successfully developed to date. Here, we introduce an in vivo system, based on a β-lactamase tripartite fusion construct, that is capable of identifying aggregation-prone sequences in the periplasm of Escherichia coli and inhibitors that prevent their aberrant self-assembly. We demonstrate the power of the system using a range of proteins, from small unstructured peptides (islet amyloid polypeptide and amyloid β) to larger, folded immunoglobulin domains. Configured in a 48-well format, the split β-lactamase sensor readily differentiates between aggregation-prone and soluble sequences. Performing the assay in the presence of 109 compounds enabled a rank ordering of inhibition and revealed a new inhibitor of islet amyloid polypeptide aggregation. This platform can be applied to both amyloidogenic and other aggregation-prone systems, independent of sequence or size, and can identify small molecules or other factors able to ameliorate or inhibit protein aggregation.
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Affiliation(s)
- Janet C Saunders
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Molecular and Cellular Biology, University of Leeds, Leeds, LS2 9JT, UK
| | - Lydia M Young
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Molecular and Cellular Biology, University of Leeds, Leeds, LS2 9JT, UK
| | - Rachel A Mahood
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Molecular and Cellular Biology, University of Leeds, Leeds, LS2 9JT, UK
| | - Matthew P Jackson
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Molecular and Cellular Biology, University of Leeds, Leeds, LS2 9JT, UK
| | - Charlotte H Revill
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Chemistry, University of Leeds, LS2 9JT, UK
| | - Richard J Foster
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Chemistry, University of Leeds, LS2 9JT, UK
| | | | - Alison E Ashcroft
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Molecular and Cellular Biology, University of Leeds, Leeds, LS2 9JT, UK
| | - David J Brockwell
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Molecular and Cellular Biology, University of Leeds, Leeds, LS2 9JT, UK
| | - Sheena E Radford
- Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.,School of Molecular and Cellular Biology, University of Leeds, Leeds, LS2 9JT, UK
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45
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Wu H, Moser C, Wang HZ, Høiby N, Song ZJ. Strategies for combating bacterial biofilm infections. Int J Oral Sci 2015; 7:1-7. [PMID: 25504208 PMCID: PMC4817533 DOI: 10.1038/ijos.2014.65] [Citation(s) in RCA: 542] [Impact Index Per Article: 60.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/16/2014] [Indexed: 12/30/2022] Open
Abstract
Formation of biofilm is a survival strategy for bacteria and fungi to adapt to their living environment, especially in the hostile environment. Under the protection of biofilm, microbial cells in biofilm become tolerant and resistant to antibiotics and the immune responses, which increases the difficulties for the clinical treatment of biofilm infections. Clinical and laboratory investigations demonstrated a perspicuous correlation between biofilm infection and medical foreign bodies or indwelling devices. Clinical observations and experimental studies indicated clearly that antibiotic treatment alone is in most cases insufficient to eradicate biofilm infections. Therefore, to effectively treat biofilm infections with currently available antibiotics and evaluate the outcomes become important and urgent for clinicians. The review summarizes the latest progress in treatment of clinical biofilm infections and scientific investigations, discusses the diagnosis and treatment of different biofilm infections and introduces the promising laboratory progress, which may contribute to prevention or cure of biofilm infections. We conclude that, an efficient treatment of biofilm infections needs a well-established multidisciplinary collaboration, which includes removal of the infected foreign bodies, selection of biofilm-active, sensitive and well-penetrating antibiotics, systemic or topical antibiotic administration in high dosage and combinations, and administration of anti-quorum sensing or biofilm dispersal agents.
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Affiliation(s)
- Hong Wu
- 1] Department of Clinical Microbiology, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark [2] Department of International Health, Immunology & Microbiology, University of Copenhagen, Copenhagen, Denmark
| | - Claus Moser
- Department of Clinical Microbiology, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Heng-Zhuang Wang
- Department of Clinical Microbiology, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Niels Høiby
- 1] Department of Clinical Microbiology, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark [2] Department of International Health, Immunology & Microbiology, University of Copenhagen, Copenhagen, Denmark
| | - Zhi-Jun Song
- 1] Department of Clinical Microbiology, Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark [2] Department of Clinical Microbiology, Slagelse Hospital, Slagelse, Denmark
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46
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Sheik DA, Brooks L, Frantzen K, Dewhurst S, Yang J. Inhibition of the enhancement of infection of human immunodeficiency virus by semen-derived enhancer of virus infection using amyloid-targeting polymeric nanoparticles. ACS NANO 2015; 9:1829-1836. [PMID: 25619867 PMCID: PMC4426188 DOI: 10.1021/nn5067254] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The semen-derived enhancer of virus infection (SEVI) is a natural amyloid material that has been shown to substantially increase viral attachment and infectivity of HIV in cells. We previously reported that synthetic monomeric and oligomeric amyloid-targeting molecules could form protein-resistive coatings on SEVI and inhibit SEVI- and semen-mediated enhancement of HIV infectivity. While oligomeric amyloid-binding compounds showed substantial improvement in apparent binding to SEVI compared to monomeric compounds, we observed only a modest correlation between apparent binding to SEVI and activity for reducing SEVI-mediated HIV infection. Here, we synthesized amyloid-binding polyacrylate-based polymers and polymeric nanoparticles of comparable size to HIV virus particles (∼150 nm) to assess the effect of sterics on the inhibition of SEVI-mediated enhancement of HIV infectivity. We show that these polymeric materials exhibit excellent capability to reduce SEVI-mediated enhancement of HIV infection, with the nanoparticles exhibiting the greatest activity (IC50 value of ∼4 μg/mL, or 59 nM based on polymer) of any SEVI-neutralizing agent reported to date. The results support that the improved activity of these nanomaterials is likely due to their increased size (diameters = 80-200 nm) compared to amyloid-targeting small molecules and that steric interactions may play as important a role as binding affinity in inhibiting viral infection mediated by SEVI amyloids. In contrast to the previously reported SEVI-neutralizing, amyloid-targeting molecules (which required concentrations at least 100-fold above the Kd to observe activity), the approximate 1:1 ratio of apparent Kd to IC50 for activity of these polymeric materials suggests the majority of polymer molecules that are bound to SEVI contribute to the inhibition of HIV infectivity enhanced by SEVI. Such size-related effects on physical inhibition of protein-protein interactions may open further opportunities for the use of targeted nanomaterials in disease intervention.
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Affiliation(s)
- Daniel A. Sheik
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla CA 92093-0358, United States
| | - Lauren Brooks
- Department of Microbiology and Immunology, University of Rochester, Rochester, New York 14642, United States
| | - Kristen Frantzen
- Department of Microbiology and Immunology, University of Rochester, Rochester, New York 14642, United States
| | - Stephen Dewhurst
- Department of Microbiology and Immunology, University of Rochester, Rochester, New York 14642, United States
| | - Jerry Yang
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla CA 92093-0358, United States
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47
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Khanal M, Larsonneur F, Raks V, Barras A, Baumann JS, Martin FA, Boukherroub R, Ghigo JM, Ortiz Mellet C, Zaitsev V, Garcia Fernandez JM, Beloin C, Siriwardena A, Szunerits S. Inhibition of type 1 fimbriae-mediated Escherichia coli adhesion and biofilm formation by trimeric cluster thiomannosides conjugated to diamond nanoparticles. NANOSCALE 2015; 7:2325-2335. [PMID: 25559389 DOI: 10.1039/c4nr05906a] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Recent advances in nanotechnology have seen the development of a number of microbiocidal and/or anti-adhesive nanoparticles displaying activity against biofilms. In this work, trimeric thiomannoside clusters conjugated to nanodiamond particles (ND) were targeted for investigation. NDs have attracted attention as a biocompatible nanomaterial and we were curious to see whether the high mannose glycotope density obtained upon grouping monosaccharide units in triads might lead to the corresponding ND-conjugates behaving as effective inhibitors of E. coli type 1 fimbriae-mediated adhesion as well as of biofilm formation. The required trimeric thiosugar clusters were obtained through a convenient thiol-ene "click" strategy and were subsequently conjugated to alkynyl-functionalized NDs using a Cu(I)-catalysed "click" reaction. We demonstrated that the tri-thiomannoside cluster-conjugated NDs (ND-Man3) show potent inhibition of type 1 fimbriae-mediated E. coli adhesion to yeast and T24 bladder cells as well as of biofilm formation. The biofilm disrupting effects demonstrated here have only rarely been reported in the past for analogues featuring such simple glycosidic motifs. Moreover, the finding that the tri-thiomannoside cluster (Man3N3) is itself a relatively efficient inhibitor, even when not conjugated to any ND edifice, suggests that alternative mono- or multivalent sugar-derived analogues might also be usefully explored for E. coli-mediated biofilm disrupting properties.
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Affiliation(s)
- Manakamana Khanal
- Institut de Recherche Interdisciplinaire (IRI, USR CNRS 3078), Université Lille 1, Parc de la Haute Borne, 50 Avenue de Halley, BP 70478, 59658 Villeneuve d'Ascq, France.
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48
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Turcheniuk K, Hage CH, Spadavecchia J, Serrano AY, Larroulet I, Pesquera A, Zurutuza A, Pisfil MG, Héliot L, Boukaert J, Boukherroub R, Szunerits S. Plasmonic photothermal destruction of uropathogenic E. coli with reduced graphene oxide and core/shell nanocomposites of gold nanorods/reduced graphene oxide. J Mater Chem B 2015; 3:375-386. [DOI: 10.1039/c4tb01760a] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The selective photothermal destruction of E. coli is shown.
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Affiliation(s)
- Kostiantyn Turcheniuk
- Institut de Recherche Interdisciplinaire (IRI, USR 3078)
- Université Lille1
- 59658 Villeneuve d'Ascq
- France
| | - Charles-Henri Hage
- Institut de Recherche Interdisciplinaire (IRI, USR 3078)
- Université Lille1
- 59658 Villeneuve d'Ascq
- France
| | - Jolanda Spadavecchia
- Laboratoire de Réactivité de Surfaces
- UMR CNRS 7197
- Université Pierre & Marie Curie – Paris VI
- 94200 Ivry-sur-Seine
- France
| | | | | | | | | | - Mariano Gonzalez Pisfil
- Institut de Recherche Interdisciplinaire (IRI, USR 3078)
- Université Lille1
- 59658 Villeneuve d'Ascq
- France
| | - Laurent Héliot
- Institut de Recherche Interdisciplinaire (IRI, USR 3078)
- Université Lille1
- 59658 Villeneuve d'Ascq
- France
| | - Julie Boukaert
- Unité de Glycobiologie Structurale et Fonctionnelle (UGSF)
- Université Lille 1
- CNRS UMR 8576
- 59655 Villeneuve d'Ascq
- France
| | - Rabah Boukherroub
- Institut de Recherche Interdisciplinaire (IRI, USR 3078)
- Université Lille1
- 59658 Villeneuve d'Ascq
- France
| | - Sabine Szunerits
- Institut de Recherche Interdisciplinaire (IRI, USR 3078)
- Université Lille1
- 59658 Villeneuve d'Ascq
- France
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49
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Zhurina MV, Gannesen AV, Zdorovenko EL, Plakunov VK. Composition and functions of the extracellular polymer matrix of bacterial biofilms. Microbiology (Reading) 2014. [DOI: 10.1134/s002626171406023x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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50
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Usnic acid, a lichen secondary metabolite inhibits Group A Streptococcus biofilms. Antonie van Leeuwenhoek 2014; 107:263-72. [PMID: 25367342 DOI: 10.1007/s10482-014-0324-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 10/29/2014] [Indexed: 10/24/2022]
Abstract
Group A Streptococci (GAS) are involved in a number of life threatening diseases and biofilm formation by these pathogens are considered as an important virulence determinant as it mediates antibiotic resistance among them. In the present study, we have explored the ability of (+)-usnic acid, a lichen secondary metabolite, as an antibiofilm agent against four serotypes of Streptococcus pyogenes causing pharyngitis. Usnic acid inhibited the biofilms of M serotypes M56, st38, M89 efficiently and the biofilm of M74 to a lesser extent. Confocal imaging of the treated samples showed that usnic acid reduced the biomass of the biofilms when compared to that of the control. Fourier Transfer Infrared (FT-IR) spectroscopy indicated that usnic acid reduced the cellular components (proteins and fatty acids) of the biofilms. Interestingly, the FT-IR spectrum further revealed that usnic acid probably acted upon the fatty acids of the biofilms as evident from the disappearance of a peak at 2,455-2,100 cm(-1) when compared to the control only in serotypes M56, st38 and M89 but not in M74. The present study shows, for the first time, that usnic acid can act as an effective antibiofilm agent against GAS.
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