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Liu L, Li H, Ma C, Liu J, Zhang Y, Xu D, Xiong J, He Y, Yang H, Chen H. Effect of anti-biofilm peptide CRAMP-34 on the biofilms of Acinetobacter lwoffii derived from dairy cows. Front Cell Infect Microbiol 2024; 14:1406429. [PMID: 39211795 PMCID: PMC11358070 DOI: 10.3389/fcimb.2024.1406429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Accepted: 07/26/2024] [Indexed: 09/04/2024] Open
Abstract
Dairy mastitis is one of the most common diseases in dairy farming, and the formation of pathogenic bacteria biofilms may be an important reason why traditional antibiotic therapy fails to resolve some cases of dairy mastitis. We isolated and identified three strains of A. lwoffii were with strong biofilm forming ability from dairy cow mastitis samples from Chongqing dairy farms in China. In order to investigate the effect of novel anti-biofilm peptide CRAMP-34 on A.lwoffii biofilms, the anti-biofilm effect was evaluated by crystal violet staining, biofilms viable bacteria counting and confocal laser scanning microscopy (CLSM). In addition, transcriptome sequencing analysis, qRT-PCR and phenotypic verification were used to explore the mechanism of its action. The results showed that CRAMP-34 had a dose-dependent eradicating effect on A. lwoffii biofilms. Transcriptome sequencing analysis showed that 36 differentially expressed genes (11 up-regulated and 25 down-regulated) were detected after the intervention with the sub-inhibitory concentration of CRAMP-34. These differentially expressed genes may be related to enzyme synthesis, fimbriae, iron uptake system, capsular polysaccharide and other virulence factors through the functional analysis of differential genes. The results of subsequent bacterial motility and adhesion tests showed that the motility of A.lwoffii were enhanced after the intervention of CRAMP-34, but there was no significant change in adhesion. It was speculated that CRAMP-34 may promote the dispersion of biofilm bacteria by enhancing the motility of biofilm bacteria, thereby achieving the effect of eradicating biofilms. Therefore, these results, along with our other previous findings, suggest that CRAMP-34 holds promise as a new biofilm eradicator and deserves further research and development.
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Affiliation(s)
- Lin Liu
- College of Veterinary Medicine, Southwest University, Chongqing, China
- National Center of Technology Innovation for Pigs, Chongqing, China
| | - Hui Li
- College of Veterinary Medicine, Southwest University, Chongqing, China
- National Center of Technology Innovation for Pigs, Chongqing, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, China
| | - Chengjun Ma
- College of Veterinary Medicine, Southwest University, Chongqing, China
- National Center of Technology Innovation for Pigs, Chongqing, China
| | - Jingjing Liu
- College of Veterinary Medicine, Southwest University, Chongqing, China
- National Center of Technology Innovation for Pigs, Chongqing, China
| | - Yang Zhang
- National Center of Technology Innovation for Pigs, Chongqing, China
- Chongqing Academy of Animal Sciences, Chongqing, China
| | - Dengfeng Xu
- National Center of Technology Innovation for Pigs, Chongqing, China
- Chongqing Academy of Animal Sciences, Chongqing, China
| | - Jing Xiong
- National Center of Technology Innovation for Pigs, Chongqing, China
- Chongqing Academy of Animal Sciences, Chongqing, China
| | - Yuzhang He
- College of Veterinary Medicine, Southwest University, Chongqing, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, China
| | - Hongzao Yang
- College of Veterinary Medicine, Southwest University, Chongqing, China
- National Center of Technology Innovation for Pigs, Chongqing, China
- Traditional Chinese Veterinary Research Institute, Southwest University, Chongqing, China
| | - Hongwei Chen
- College of Veterinary Medicine, Southwest University, Chongqing, China
- National Center of Technology Innovation for Pigs, Chongqing, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, China
- Traditional Chinese Veterinary Research Institute, Southwest University, Chongqing, China
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Long J, Yang C, Liu J, Ma C, Jiao M, Hu H, Xiong J, Zhang Y, Wei W, Yang H, He Y, Zhu M, Yu Y, Fu L, Chen H. Tannic acid inhibits Escherichia coli biofilm formation and underlying molecular mechanisms: Biofilm regulator CsgD. Biomed Pharmacother 2024; 175:116716. [PMID: 38735084 DOI: 10.1016/j.biopha.2024.116716] [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: 02/29/2024] [Revised: 04/27/2024] [Accepted: 05/06/2024] [Indexed: 05/14/2024] Open
Abstract
Biofilms often engender persistent infections, heightened antibiotic resistance, and the recurrence of infections. Therefor, infections related to bacterial biofilms are often chronic and pose challenges in terms of treatment. The main transcription regulatory factor, CsgD, activates csgABC-encoded curli to participate in the composition of extracellular matrix, which is an important skeleton for biofilm development in enterobacteriaceae. In our previous study, a wide range of natural bioactive compounds that exhibit strong affinity to CsgD were screened and identified via molecular docking. Tannic acid (TA) was subsequently chosen, based on its potent biofilm inhibition effect as observed in crystal violet staining. Therefore, the aim of this study was to investigate the specific effects of TA on the biofilm formation of clinically isolated Escherichia coli (E. coli). Results demonstrated a significant inhibition of E. coli Ec032 biofilm formation by TA, while not substantially affecting the biofilm of the ΔcsgD strain. Moreover, deletion of the csgD gene led to a reduction in Ec032 biofilm formation, alongside diminished bacterial motility and curli synthesis inhibition. Transcriptomic analysis and RT-qPCR revealed that TA repressed genes associated with the csg operon and other biofilm-related genes. In conclusion, our results suggest that CsgD is one of the key targets for TA to inhibit E. coli biofilm formation. This work preliminarily elucidates the molecular mechanisms of TA inhibiting E. coli biofilm formation, which could provide a lead structure for the development of future antibiofilm drugs.
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Affiliation(s)
- Jinying Long
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China; National Center of Technology Innovation for Pigs, Chongqing 402460, China; Immunology Research Center, Medical Research Institute, Southwest University, Chongqing 402460, China
| | - Can Yang
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China; National Center of Technology Innovation for Pigs, Chongqing 402460, China; Immunology Research Center, Medical Research Institute, Southwest University, Chongqing 402460, China
| | - JingJing Liu
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China; National Center of Technology Innovation for Pigs, Chongqing 402460, China
| | - Chengjun Ma
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China; National Center of Technology Innovation for Pigs, Chongqing 402460, China
| | - Min Jiao
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China; National Center of Technology Innovation for Pigs, Chongqing 402460, China
| | - Huiming Hu
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China
| | - Jing Xiong
- National Center of Technology Innovation for Pigs, Chongqing 402460, China; Chongqing Academy of Animal Sciences, Chongqing 402460, China
| | - Yang Zhang
- National Center of Technology Innovation for Pigs, Chongqing 402460, China; Chongqing Academy of Animal Sciences, Chongqing 402460, China
| | - Wei Wei
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China; National Center of Technology Innovation for Pigs, Chongqing 402460, China; Traditional Chinese Veterinary Research Institute, Southwest University, Chongqing 402460, China
| | - Hongzao Yang
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China; National Center of Technology Innovation for Pigs, Chongqing 402460, China; Traditional Chinese Veterinary Research Institute, Southwest University, Chongqing 402460, China
| | - Yuzhang He
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China; Immunology Research Center, Medical Research Institute, Southwest University, Chongqing 402460, China
| | - Maixun Zhu
- National Center of Technology Innovation for Pigs, Chongqing 402460, China; Chongqing Academy of Animal Sciences, Chongqing 402460, China
| | - Yuandi Yu
- National Center of Technology Innovation for Pigs, Chongqing 402460, China; Chongqing Academy of Animal Sciences, Chongqing 402460, China
| | - Lizhi Fu
- National Center of Technology Innovation for Pigs, Chongqing 402460, China; Chongqing Academy of Animal Sciences, Chongqing 402460, China.
| | - Hongwei Chen
- College of Veterinary Medicine, Southwest University, Chongqing 402460, China; National Center of Technology Innovation for Pigs, Chongqing 402460, China; Immunology Research Center, Medical Research Institute, Southwest University, Chongqing 402460, China; Traditional Chinese Veterinary Research Institute, Southwest University, Chongqing 402460, China.
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Ma C, Mei C, Liu J, Li H, Jiao M, Hu H, Zhang Y, Xiong J, He Y, Wei W, Yang H, Chen H. Effect of baicalin on eradicating biofilms of bovine milk derived Acinetobacter lwoffii. BMC Vet Res 2024; 20:212. [PMID: 38764041 PMCID: PMC11103975 DOI: 10.1186/s12917-024-04015-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 04/12/2024] [Indexed: 05/21/2024] Open
Abstract
BACKGROUND Acinetobacter lwoffii (A.lwoffii) is a serious zoonotic pathogen that has been identified as a cause of infections such as meningitis, bacteremia and pneumonia. In recent years, the infection rate and detection rate of A.lwoffii is increasing, especially in the breeding industry. Due to the presence of biofilms, it is difficult to eradicate and has become a potential super drug-resistant bacteria. Therefore, eradication of preformed biofilm is an alternative therapeutic action to control A.lwoffii infection. The present study aimed to clarify that baicalin could eradicate A.lwoffii biofilm in dairy cows, and to explore the mechanism of baicalin eradicating A.lwoffii. RESULTS The results showed that compared to the control group, the 4 MIC of baicalin significantly eradicated the preformed biofilm, and the effect was stable at this concentration, the number of viable bacteria in the biofilm was decreased by 0.67 Log10CFU/mL. The total fluorescence intensity of biofilm bacteria decreased significantly, with a reduction rate of 67.0%. There were 833 differentially expressed genes (367 up-regulated and 466 down-regulated), whose functions mainly focused on oxidative phosphorylation, biofilm regulation system and trehalose synthesis. Molecular docking analysis predicted 11 groups of target proteins that were well combined with baicalin, and the content of trehalose decreased significantly after the biofilm of A.lwoffii was treated with baicalin. CONCLUSIONS The present study evaluated the antibiofilm potential of baicalin against A.lwoffii. Baicalin revealed strong antibiofilm potential against A.lwoffii. Baicalin induced biofilm eradication may be related to oxidative phosphorylation and TCSs. Moreover, the decrease of trehalose content may be related to biofilm eradication.
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Affiliation(s)
- Chengjun Ma
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China
| | - Cui Mei
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China
| | - JingJing Liu
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China
| | - Hui Li
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China
| | - Min Jiao
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China
| | - Huiming Hu
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China
| | - Yang Zhang
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Chongqing Academy of Animal Sciences, Chongqing, 402460, China
| | - Jing Xiong
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Chongqing Academy of Animal Sciences, Chongqing, 402460, China
| | - Yuzhang He
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China
| | - Wei Wei
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China
| | - Hongzao Yang
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China.
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China.
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China.
| | - Hongwei Chen
- College of Veterinary Medicine, Southwest University, Chongqing, 402460, China.
- National Center of Technology Innovation for Pigs, Chongqing, 402460, China.
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, 402460, China.
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Fontanot A, Ellinger I, Unger WWJ, Hays JP. A Comprehensive Review of Recent Research into the Effects of Antimicrobial Peptides on Biofilms-January 2020 to September 2023. Antibiotics (Basel) 2024; 13:343. [PMID: 38667019 PMCID: PMC11047476 DOI: 10.3390/antibiotics13040343] [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: 03/11/2024] [Revised: 04/03/2024] [Accepted: 04/04/2024] [Indexed: 04/29/2024] Open
Abstract
Microbial biofilm formation creates a persistent and resistant environment in which microorganisms can survive, contributing to antibiotic resistance and chronic inflammatory diseases. Increasingly, biofilms are caused by multi-drug resistant microorganisms, which, coupled with a diminishing supply of effective antibiotics, is driving the search for new antibiotic therapies. In this respect, antimicrobial peptides (AMPs) are short, hydrophobic, and amphipathic peptides that show activity against multidrug-resistant bacteria and biofilm formation. They also possess broad-spectrum activity and diverse mechanisms of action. In this comprehensive review, 150 publications (from January 2020 to September 2023) were collected and categorized using the search terms 'polypeptide antibiotic agent', 'antimicrobial peptide', and 'biofilm'. During this period, a wide range of natural and synthetic AMPs were studied, of which LL-37, polymyxin B, GH12, and Nisin were the most frequently cited. Furthermore, although many microbes were studied, Staphylococcus aureus and Pseudomonas aeruginosa were the most popular. Publications also considered AMP combinations and the potential role of AMP delivery systems in increasing the efficacy of AMPs, including nanoparticle delivery. Relatively few publications focused on AMP resistance. This comprehensive review informs and guides researchers about the latest developments in AMP research, presenting promising evidence of the role of AMPs as effective antimicrobial agents.
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Affiliation(s)
- Alessio Fontanot
- Department of Medical Microbiology & Infectious Diseases, Erasmus University Medical Centre (Erasmus MC), Dr. Molewaterplein 40, 3015 GD Rotterdam, The Netherlands; (A.F.); (W.W.J.U.)
- Department of Pediatrics, Laboratory of Pediatrics, Erasmus University Medical Center Rotterdam, Sophia Children’s Hospital, Dr. Molewaterplein 40, 3015 GD Rotterdam, The Netherlands
| | - Isabella Ellinger
- Institute of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Währinger Gürtel 18–20, 1090 Vienna, Austria;
| | - Wendy W. J. Unger
- Department of Medical Microbiology & Infectious Diseases, Erasmus University Medical Centre (Erasmus MC), Dr. Molewaterplein 40, 3015 GD Rotterdam, The Netherlands; (A.F.); (W.W.J.U.)
- Department of Pediatrics, Laboratory of Pediatrics, Erasmus University Medical Center Rotterdam, Sophia Children’s Hospital, Dr. Molewaterplein 40, 3015 GD Rotterdam, The Netherlands
| | - John P. Hays
- Department of Medical Microbiology & Infectious Diseases, Erasmus University Medical Centre (Erasmus MC), Dr. Molewaterplein 40, 3015 GD Rotterdam, The Netherlands; (A.F.); (W.W.J.U.)
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Wang S, Ma C, Long J, Cheng P, Zhang Y, Peng L, Fu L, Yu Y, Xu D, Zhang S, Qiu J, He Y, Yang H, Chen H. Impact of CRAMP-34 on Pseudomonas aeruginosa biofilms and extracellular metabolites. Front Cell Infect Microbiol 2023; 13:1295311. [PMID: 38162583 PMCID: PMC10757720 DOI: 10.3389/fcimb.2023.1295311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 11/30/2023] [Indexed: 01/03/2024] Open
Abstract
Biofilm is a structured community of bacteria encased within a self-produced extracellular matrix. When bacteria form biofilms, they undergo a phenotypic shift that enhances their resistance to antimicrobial agents. Consequently, inducing the transition of biofilm bacteria to the planktonic state may offer a viable approach for addressing infections associated with biofilms. Our previous study has shown that the mouse antimicrobial peptide CRAMP-34 can disperse Pseudomonas aeruginosa (P. aeruginosa) biofilm, and the potential mechanism of CRAMP-34 eradicate P. aeruginosa biofilms was also investigated by combined omics. However, changes in bacterial extracellular metabolism have not been identified. To further explore the mechanism by which CRAMP-34 disperses biofilm, this study analyzed its effects on the extracellular metabolites of biofilm cells via metabolomics. The results demonstrated that a total of 258 significantly different metabolites were detected in the untargeted metabolomics, of which 73 were downregulated and 185 were upregulated. Pathway enrichment analysis of differential metabolites revealed that metabolic pathways are mainly related to the biosynthesis and metabolism of amino acids, and it also suggested that CRAMP-34 may alter the sensitivity of biofilm bacteria to antibiotics. Subsequently, it was confirmed that the combination of CRAMP-34 with vancomycin and colistin had a synergistic effect on dispersed cells. These results, along with our previous findings, suggest that CRAMP-34 may promote the transition of PAO1 bacteria from the biofilm state to the planktonic state by upregulating the extracellular glutamate and succinate metabolism and eventually leading to the dispersal of biofilm. In addition, increased extracellular metabolites of myoinositol, palmitic acid and oleic acid may enhance the susceptibility of the dispersed bacteria to the antibiotics colistin and vancomycin. CRAMP-34 also delayed the development of bacterial resistance to colistin and ciprofloxacin. These results suggest the promising development of CRAMP-34 in combination with antibiotics as a potential candidate to provide a novel therapeutic approach for the prevention and treatment of biofilm-associated infections.
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Affiliation(s)
- Shiyuan Wang
- College of Veterinary Medicine, Southwest University, Chongqing, China
- Collaborative Innovation Institute National Center of Technology Innovation for Pigs, Chongqing, China
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Chengjun Ma
- College of Veterinary Medicine, Southwest University, Chongqing, China
- Collaborative Innovation Institute National Center of Technology Innovation for Pigs, Chongqing, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, China
| | - Jinying Long
- College of Veterinary Medicine, Southwest University, Chongqing, China
- Collaborative Innovation Institute National Center of Technology Innovation for Pigs, Chongqing, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, China
| | - Peng Cheng
- College of Veterinary Medicine, Southwest University, Chongqing, China
- Collaborative Innovation Institute National Center of Technology Innovation for Pigs, Chongqing, China
| | - Yang Zhang
- Collaborative Innovation Institute National Center of Technology Innovation for Pigs, Chongqing, China
- Institute of Veterinary Medicine Academy of Animal Sciences, Chongqing, China
| | - Lianci Peng
- College of Veterinary Medicine, Southwest University, Chongqing, China
- Collaborative Innovation Institute National Center of Technology Innovation for Pigs, Chongqing, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, China
| | - Lizhi Fu
- Collaborative Innovation Institute National Center of Technology Innovation for Pigs, Chongqing, China
- Institute of Veterinary Medicine Academy of Animal Sciences, Chongqing, China
| | - Yuandi Yu
- Collaborative Innovation Institute National Center of Technology Innovation for Pigs, Chongqing, China
- Institute of Veterinary Medicine Academy of Animal Sciences, Chongqing, China
| | - Dengfeng Xu
- Collaborative Innovation Institute National Center of Technology Innovation for Pigs, Chongqing, China
- Institute of Veterinary Medicine Academy of Animal Sciences, Chongqing, China
| | - Suhui Zhang
- Collaborative Innovation Institute National Center of Technology Innovation for Pigs, Chongqing, China
- Institute of Veterinary Medicine Academy of Animal Sciences, Chongqing, China
| | - Jinjie Qiu
- Collaborative Innovation Institute National Center of Technology Innovation for Pigs, Chongqing, China
- Institute of Veterinary Medicine Academy of Animal Sciences, Chongqing, China
| | - Yuzhang He
- College of Veterinary Medicine, Southwest University, Chongqing, China
- Collaborative Innovation Institute National Center of Technology Innovation for Pigs, Chongqing, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, China
| | - Hongzao Yang
- College of Veterinary Medicine, Southwest University, Chongqing, China
- Collaborative Innovation Institute National Center of Technology Innovation for Pigs, Chongqing, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, China
| | - Hongwei Chen
- College of Veterinary Medicine, Southwest University, Chongqing, China
- Collaborative Innovation Institute National Center of Technology Innovation for Pigs, Chongqing, China
- Immunology Research Center, Medical Research Institute, Southwest University, Chongqing, China
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Qi R, Cui Y, Liu J, Wang X, Yuan H. Recent Advances of Composite Nanomaterials for Antibiofilm Application. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2725. [PMID: 37836366 PMCID: PMC10574477 DOI: 10.3390/nano13192725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 10/05/2023] [Accepted: 10/06/2023] [Indexed: 10/15/2023]
Abstract
A biofilm is a microbial community formed by bacteria that adsorb on the surface of tissues or materials and is wrapped in extracellular polymeric substances (EPS) such as polysaccharides, proteins and nucleic acids. As a protective barrier, the EPS can not only prevent the penetration of antibiotics and other antibacterial agents into the biofilm, but also protect the bacteria in the biofilm from the attacks of the human immune system, making it difficult to eradicate biofilm-related infections and posing a serious threat to public health. Therefore, there is an urgent need to develop new and efficient antibiofilm drugs. Although natural enzymes (lysozyme, peroxidase, etc.) and antimicrobial peptides have excellent bactericidal activity, their low stability in the physiological environment and poor permeability in biofilms limit their application in antibiofilms. With the development of materials science, more and more nanomaterials are being designed to be utilized for antimicrobial and antibiofilm applications. Nanomaterials have great application prospects in antibiofilm because of their good biocompati-bility, unique physical and chemical properties, adjustable nanostructure, high permeability and non-proneness to induce bacterial resistance. In this review, with the application of composite nanomaterials in antibiofilms as the theme, we summarize the research progress of three types of composite nanomaterials, including organic composite materials, inorganic materials and organic-inorganic hybrid materials, used as antibiofilms with non-phototherapy and phototherapy modes of action. At the same time, the challenges and development directions of these composite nanomaterials in antibiofilm therapy are also discussed. It is expected we will provide new ideas for the design of safe and efficient antibiofilm materials.
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Affiliation(s)
- Ruilian Qi
- Department of Chemistry, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China; (R.Q.); (Y.C.)
| | - Yuanyuan Cui
- Department of Chemistry, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China; (R.Q.); (Y.C.)
| | - Jian Liu
- Institute of Chemistry, Chinese Academy of Sciences, Beijing 100090, China;
| | - Xiaoyu Wang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
| | - Huanxiang Yuan
- Department of Chemistry, College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing 100048, China; (R.Q.); (Y.C.)
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de Sousa T, Garcês A, Silva A, Lopes R, Alegria N, Hébraud M, Igrejas G, Poeta P. The Impact of the Virulence of Pseudomonas aeruginosa Isolated from Dogs. Vet Sci 2023; 10:vetsci10050343. [PMID: 37235426 DOI: 10.3390/vetsci10050343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/09/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023] Open
Abstract
Pseudomonas aeruginosa is a pathogenic bacterium that can cause serious infections in both humans and animals, including dogs. Treatment of this bacterium is challenging because some strains have developed multi-drug resistance. This study aimed to evaluate the antimicrobial resistance patterns and biofilm production of clinical isolates of P. aeruginosa obtained from dogs. The study found that resistance to various β-lactam antimicrobials was widespread, with cefovecin and ceftiofur showing resistance in 74% and 59% of the isolates tested, respectively. Among the aminoglycosides, all strains showed susceptibility to amikacin and tobramycin, while gentamicin resistance was observed in 7% of the tested isolates. Furthermore, all isolates carried the oprD gene, which is essential in governing the entry of antibiotics into bacterial cells. The study also investigated the presence of virulence genes and found that all isolates carried exoS, exoA, exoT, exoY, aprA, algD, and plcH genes. This study compared P. aeruginosa resistance patterns worldwide, emphasizing regional understanding and responsible antibiotic use to prevent multi-drug resistance from emerging. In general, the results of this study emphasize the importance of the continued monitoring of antimicrobial resistance in veterinary medicine.
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Affiliation(s)
- Telma de Sousa
- Department of Genetics and Biotechnology, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Microbiology and Antibiotic Resistance Team (MicroART), Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Functional Genomics and Proteomics Unit, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Associate Laboratory for Green Chemistry (LAQV), Chemistry Department, Faculty of Science and Technology, University Nova of Lisbon, 2829-516 Lisbon, Portugal
| | - Andreia Garcês
- CRL-CESPU, Cooperativa de Ensino Superior Politécnico e Universitário, R. Central Dada Gandra, 1317, 4585-116 Gandra, Portugal
- CITAB, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
| | - Augusto Silva
- INNO-Veterinary Laboratory, R. Cândido de Sousa 15, 4710-503 Braga, Portugal
| | - Ricardo Lopes
- INNO-Veterinary Laboratory, R. Cândido de Sousa 15, 4710-503 Braga, Portugal
| | - Nuno Alegria
- Department of Veterinary Sciences, School of Agrarian and Veterinary Sciences, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
| | - Michel Hébraud
- UMR Microbiologie Environnement Digestif Santé (MEDiS), INRAE, Université Clermont Auvergne, 60122 Saint-Genès-Champanelle, France
| | - Gilberto Igrejas
- Department of Genetics and Biotechnology, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Functional Genomics and Proteomics Unit, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Associate Laboratory for Green Chemistry (LAQV), Chemistry Department, Faculty of Science and Technology, University Nova of Lisbon, 2829-516 Lisbon, Portugal
| | - Patricia Poeta
- Microbiology and Antibiotic Resistance Team (MicroART), Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Associate Laboratory for Green Chemistry (LAQV), Chemistry Department, Faculty of Science and Technology, University Nova of Lisbon, 2829-516 Lisbon, Portugal
- Veterinary and Animal Research Centre (CECAV), University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
- Associate Laboratory for Animal and Veterinary Sciences (AL4AnimalS), University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal
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