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Devi R, Singh G, Singh A, Singh J, Kaur N, Singh N. Silver and Copper Nanoparticle-Loaded Self-Assembled Pseudo-Peptide Thiourea-Based Organic-Inorganic Hybrid Gel with Antibacterial and Superhydrophobic Properties for Antifouling Surfaces. ACS APPLIED BIO MATERIALS 2024; 7:4162-4174. [PMID: 38769764 DOI: 10.1021/acsabm.4c00476] [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] [Indexed: 05/22/2024]
Abstract
The escalating threat of antimicrobial resistance has become a global health crisis. Therefore, there is a rising momentum in developing biomaterials with self-sanitizing capabilities and inherent antibacterial properties. Despite their promising antimicrobial properties, metal nanoparticles (MNPs) have several disadvantages, including increased toxicity as the particle size decreases, leading to oxidative stress and DNA damage that need consideration. One solution is surface functionalization with biocompatible organic ligands, which can improve nanoparticle dispersibility, reduce aggregation, and enable targeted delivery to microbial cells. The existing research predominantly concentrates on the advancement of peptide-based hydrogels for coating materials to prevent bacterial infection, with limited exploration of developing surface coatings using organogels. Herein, we have synthesized organogel-based coatings doped with MNPs that can offer superior hydrophobicity, oleophobicity, and high stability that are not easily achievable with hydrogels. The self-assembled gels displayed distinct morphologies, as revealed by scanning electron microscopy and atomic force microscopy. The cross-linked matrix helps in the controlled and sustained release of MNPs at the site of bacterial infection. The synthesized self-assembled gel@MNPs exhibited excellent antibacterial properties against harmful bacteria such as Escherichia coli and Staphylococcus aureus and reduced bacterial viability up to 95% within 4 h. Cytotoxicity testing against metazoan cells demonstrated that the gels doped with MNPs were nontoxic (IC50 > 100 μM) to mammalian cells. Furthermore, in this study, we coated the organogel@MNPs on cotton fabric and tested it against Gram +ve and Gram -ve bacteria. Additionally, the developed cotton fabric exhibited superhydrophobic properties and developed a barrier that limits the interaction between bacteria and the surface, making it difficult for bacteria to adhere and colonize, which holds potential as a valuable resource for self-cleaning coatings.
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Affiliation(s)
- Renu Devi
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
| | - Gagandeep Singh
- Department of Biomedical Engineering, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
| | - Anoop Singh
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
| | - Jagdish Singh
- Bioprocess Technology Laboratory, Department of Biotechnology, Mata Gujri College Fatehgarh Sahib, Fatehgarh Sahib, Punjab 140406, India
| | - Navneet Kaur
- Department of Chemistry, Panjab University Chandigarh, Chandigarh 160014, India
| | - Narinder Singh
- Department of Chemistry, Indian Institute of Technology Ropar, Rupnagar, Punjab 140001, India
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2
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Zhou Z, Zhang X, Zeng S, Xu Y, Nie W, Zhou Y, Chen P. Quaternary ammonium salts for water treatment with balanced rate of sterilization and degradation. CHEMOSPHERE 2024; 352:141386. [PMID: 38316276 DOI: 10.1016/j.chemosphere.2024.141386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 01/06/2024] [Accepted: 02/03/2024] [Indexed: 02/07/2024]
Abstract
The growing number of infections caused by drug-resistant bacteria which arise from the overuse of antibiotics has severely affected the normal operation of human society. The high antibacterial activity of QAS makes it promising as an alternative to antibiotics, but it suffers from secondary pollution due to its non-degradation. Here we have synthesized a class of gemini quaternary ammonium salts (GQAS) with different carbon chain lengths containing ester groups by using facile methylation reaction. Quaternary ammonium groups contribute to insert negatively charged bacterial membranes, resulting in membrane damage and bacteria death. Compared with conventional single-chain QAS, except for the more efficient antibacterial efficiency attribute to the presence of the second carbon chain, GQAS with alterable antibacterial properties can minimize the possibility of bacterial resistance and reduce the accumulation of GQAS in the environment through the introduction of degradable ester groups. GQAS is completely superior to the commercial bactericide benzalkonium chloride (BAC) in both antibacterial activity and degrade performance, which can be used as a more environmentally friendly bactericide.
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Affiliation(s)
- Zhenyang Zhou
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, 230601, China.
| | - XiRan Zhang
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, 230601, China.
| | - Shaohua Zeng
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, 230601, China.
| | - Ying Xu
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, 230601, China.
| | - Wangyan Nie
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, 230601, China.
| | - Yifeng Zhou
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, 230601, China.
| | - Pengpeng Chen
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei, 230601, China.
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3
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Li ZY, Zhang X, Qian YL, Du FS, Li ZC. Synthesis and antibacterial properties of fluorinated biodegradable cationic polyesters. J Mater Chem B 2024; 12:1569-1578. [PMID: 38252543 DOI: 10.1039/d3tb02578k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Abstract
Antimicrobial peptide-mimicking antibacterial polymers represent a practical strategy to conquer the ever-growing threat of antimicrobial resistance. Herein, we report the syntheses and antibacterial performance of degradable amphiphilic cationic polyesters containing pendent quaternary ammonium motifs and hydrophobic alkyl or fluoroalkyl groups. These polyesters were conveniently prepared from poly(3-methylene-1,5-dioxepan-2-one) via highly efficient one-pot successive thiol-Michael addition reactions. The antibacterial activity of these polyesters against S. aureus and E. coli and their hemolytic activity toward red blood cells were evaluated; some of them showed moderate antibacterial activity and selectivity against Gram-positive S. aureus. The membrane disruption mechanism of these cationic polyesters was briefly explored by monitoring the bacteria killing kinetics and SEM observations. Moreover, the effects of cationic/hydrophobic ratio and the incorporation of fluoroalkyl groups on the antibacterial activity and selectivity of the polyesters were demonstrated.
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Affiliation(s)
- Zhao-Yue Li
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, China.
| | - Xiaoying Zhang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology (NCNST), Beijing, 100190, China
| | - Yi-Lin Qian
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, China.
| | - Fu-Sheng Du
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, China.
| | - Zi-Chen Li
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Center for Soft Matter Science and Engineering, College of Chemistry & Molecular Engineering, Peking University, Beijing 100871, China.
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4
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Zhou Z, Zhou S, Zhang X, Zeng S, Xu Y, Nie W, Zhou Y, Xu T, Chen P. Quaternary Ammonium Salts: Insights into Synthesis and New Directions in Antibacterial Applications. Bioconjug Chem 2023; 34:302-325. [PMID: 36748912 DOI: 10.1021/acs.bioconjchem.2c00598] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The overuse of antibiotics has led to the emergence of a large number of antibiotic-resistant genes in bacteria, and increasing evidence indicates that a fungicide with an antibacterial mechanism different from that of antibiotics is needed. Quaternary ammonium salts (QASs) are a biparental substance with good antibacterial properties that kills bacteria through simple electrostatic adsorption and insertion into cell membranes/altering of cell membrane permeability. Therefore, the probability of bacteria developing drug resistance is greatly reduced. In this review, we focus on the synthesis and application of single-chain QASs, double-chain QASs, heterocyclic QASs, and gemini QASs (GQASs). Some possible structure-function relationships of QASs are also summarized. As such, we hope this review will provide insight for researchers to explore more applications of QASs in the field of antimicrobials with the aim of developing systems for clinical applications.
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Affiliation(s)
- Zhenyang Zhou
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China
| | - Shuguang Zhou
- Department of Gynecology, Anhui Province Maternity and Child Healthcare Hospital, Hefei, Anhui 236000, China
| | - Xiran Zhang
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China
| | - Shaohua Zeng
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China
| | - Ying Xu
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China
| | - Wangyan Nie
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China
| | - Yifeng Zhou
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China
| | - Tao Xu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei 230032, China
| | - Pengpeng Chen
- Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, School of Chemistry & Chemical Engineering, Anhui University, Hefei 230601, China
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5
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Si Z, Zheng W, Prananty D, Li J, Koh CH, Kang ET, Pethe K, Chan-Park MB. Polymers as advanced antibacterial and antibiofilm agents for direct and combination therapies. Chem Sci 2022; 13:345-364. [PMID: 35126968 PMCID: PMC8729810 DOI: 10.1039/d1sc05835e] [Citation(s) in RCA: 45] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 12/12/2021] [Indexed: 12/13/2022] Open
Abstract
The growing prevalence of antimicrobial drug resistance in pathogenic bacteria is a critical threat to global health. Conventional antibiotics still play a crucial role in treating bacterial infections, but the emergence and spread of antibiotic-resistant micro-organisms are rapidly eroding their usefulness. Cationic polymers, which target bacterial membranes, are thought to be the last frontier in antibacterial development. This class of molecules possesses several advantages including a low propensity for emergence of resistance and rapid bactericidal effect. This review surveys the structure-activity of advanced antimicrobial cationic polymers, including poly(α-amino acids), β-peptides, polycarbonates, star polymers and main-chain cationic polymers, with low toxicity and high selectivity to potentially become useful for real applications. Their uses as potentiating adjuvants to overcome bacterial membrane-related resistance mechanisms and as antibiofilm agents are also covered. The review is intended to provide valuable information for design and development of cationic polymers as antimicrobial and antibiofilm agents for translational applications.
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Affiliation(s)
- Zhangyong Si
- School of Chemical and Biomedical Engineering, Nanyang Technological University Singapore 637459 Singapore
| | - Wenbin Zheng
- School of Chemical and Biomedical Engineering, Nanyang Technological University Singapore 637459 Singapore
| | - Dicky Prananty
- School of Chemical and Biomedical Engineering, Nanyang Technological University Singapore 637459 Singapore
| | - Jianghua Li
- School of Chemical and Biomedical Engineering, Nanyang Technological University Singapore 637459 Singapore
| | - Chong Hui Koh
- School of Chemical and Biomedical Engineering, Nanyang Technological University Singapore 637459 Singapore
| | - En-Tang Kang
- Department of Chemical & Biomolecular Engineering, National University of Singapore 4 Engineering Drive 4, Kent Ridge Singapore 117585 Singapore
| | - Kevin Pethe
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore 636921 Singapore
- School of Biological Sciences, Nanyang Technological University Singapore 637551 Singapore
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University Singapore 637459 Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore 636921 Singapore
- School of Physical & Mathematical Sciences, Nanyang Technological University Singapore 637371 Singapore
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6
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Huang G, Shen H, Chen X, Wu T, Chen Z, Chen Y, Song J, Cai Q, Bai Y, Pu H, Feng X. A Degradable, Broad-Spectrum and Resistance-Resistant Antimicrobial Oligoguanidine as Disinfecting and Therapeutic Agent in Aquaculture. Polym Chem 2022. [DOI: 10.1039/d2py00183g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The threat of antibiotic resistance to community healthcare and global economy has raised extensive concern, and the over-use of antibiotics in animal husbandry plays a significant role in the occurrence...
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7
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Cuervo-Rodríguez R, López-Fabal F, Muñoz-Bonilla A, Fernández-García M. Antibacterial Polymers Based on Poly(2-hydroxyethyl methacrylate) and Thiazolium Groups with Hydrolytically Labile Linkages Leading to Inactive and Low Cytotoxic Compounds. MATERIALS (BASEL, SWITZERLAND) 2021; 14:7477. [PMID: 34885630 PMCID: PMC8659269 DOI: 10.3390/ma14237477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 11/25/2021] [Accepted: 12/02/2021] [Indexed: 11/17/2022]
Abstract
Herein, we develop a well-defined antibacterial polymer based on poly(2-hydroxyethyl methacrylate) (PHEMA) and a derivative of vitamin B1, easily degradable into inactive and biocompatible compounds. Hence, thiazole moiety was attached to HEMA monomer through a carbonate pH-sensitive linkage and the resulting monomer was polymerized via reversible addition-fragmentation chain transfer (RAFT) polymerization. N-alkylation reaction of the thiazole groups leads to cationic polymer with thiazolium groups. This polymer exhibits excellent antibacterial activity against methicillin-resistant Staphylococcus aureus (MRSA) with an MIC value of 78 µg mL-1, whereas its degradation product, thiazolium small molecule, was found to be inactive. Hemotoxicity studies confirm the negligible cytotoxicity of the degradation product in comparison with the original antibacterial polymer. The degradation of the polymer at physiological pH was found to be progressive and slow, thus the cationic polymer is expected to maintain its antibacterial characteristics at physiological conditions for a relative long period of time before its degradation. This degradation minimizes antimicrobial pollution in the environment and side effects in the body after eradicating bacterial infection.
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Affiliation(s)
- Rocío Cuervo-Rodríguez
- Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Avenida Complutense s/n, Ciudad Universitaria, 28040 Madrid, Spain;
| | - Fátima López-Fabal
- Hospital Universitario de Móstoles, C/Dr. Luis Montes s/n, 28935 Móstoles, Spain;
| | - Alexandra Muñoz-Bonilla
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain
| | - Marta Fernández-García
- Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain
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8
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Chan SP, Lim DSW, Armugam A, Yi G, Zhang Y. Soft Surface Nanostructure with Semi-Free Polyionic Components for Sustainable Antimicrobial Plastic. Int J Mol Sci 2021; 22:ijms222212315. [PMID: 34830199 PMCID: PMC8621035 DOI: 10.3390/ijms222212315] [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: 10/20/2021] [Revised: 11/05/2021] [Accepted: 11/10/2021] [Indexed: 01/04/2023] Open
Abstract
Surface antimicrobial materials are of interest as they can combat the critical threat of microbial contamination without contributing to issues of environmental contamination and the development drug resistance. Most nanostructured surfaces are prepared by post fabrication modifications and actively release antimicrobial agents. These properties limit the potential applications of nanostructured materials on flexible surfaces. Here, we report on an easily synthesized plastic material with inherent antimicrobial activity, demonstrating excellent microbicidal properties against common bacteria and fungus. The plastic material did not release antimicrobial components as they were anchored to the polymer chains via strong covalent bonds. Time-kill kinetics studies have shown that bactericidal effects take place when bacteria come into contact with a material for a prolonged period, resulting in the deformation and rupture of bacteria cells. A scanning probe microscopy analysis revealed soft nanostructures on the submicron scale, for which the formation is thought to occur via surface phase separation. These soft nanostructures allow for polyionic antimicrobial components to be present on the surface, where they freely interact with and kill microbes. Overall, the new green and sustainable plastic is easily synthesized and demonstrates inherent and long-lasting activity without toxic chemical leaching.
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9
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Gong C, Sun J, Xiao Y, Qu X, Lang M. Synthetic Mimics of Antimicrobial Peptides for the Targeted Therapy of Multidrug-Resistant Bacterial Infection. Adv Healthc Mater 2021; 10:e2101244. [PMID: 34410043 DOI: 10.1002/adhm.202101244] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 08/03/2021] [Indexed: 12/28/2022]
Abstract
Antibacterial materials are highly demanded in treatment of bacterial infection, especially severe ones with multidrug-resistance. Herein, pH-responsive polypeptide, i.e., poly-L-lysine modified by 1-(propylthio)acetic acid-3-octylimidazolium and citraconic anhydride (PLL-POIM-CA), is synthesized by post-polymerization modification of poly-L-lysine (PLL) with 1-(propylthio)acetic acid-3-octylimidazolium (POIM) and citraconic anhydride (CA). It is observed that PLL-POIM-CA is stable under normal physiological condition, while CA cleaves rapidly at weakly acidic environment like bacterial infectious sites. The hydrolyzed PLL-POIM-CA exhibits excellent broad-spectrum antibacterial activities against Gram-negative bacteria of Escherichia coli and Gram-positive bacteria of Staphylococcus aureus and methicillin-resistant Staphylococcus aureus (MRSA). In particular, the minimum inhibitory concentration (MIC) against multidrug-resistant bacteria like MRSA is as low as 7.8 µg mL-1 . Moreover, PLL-POIM-CA exhibits good biocompatibility with mouse fibroblast cells (L929) in vitro and improved hemocompatibility with an HC50 exceeding 5000 µg mL-1 . Therefore, PLL-POIM-CA displays an excellent bacteria versus cells selectivity (HC50 /MIC) over 534, which is 53 times higher than natural antimicrobial peptide of indolicidin. It is further demonstrated in vivo that the antimicrobial polypeptide effectively accelerates MRSA-infected wound healing by relieving local inflammatory response. Therefore, this targeted antimicrobial polypeptide has broad application prospects for the treatment of multidrug-resistant bacterial infection.
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Affiliation(s)
- Chenyu Gong
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
| | - Junjie Sun
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
| | - Yan Xiao
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
| | - Xue Qu
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
| | - Meidong Lang
- Shanghai Key Laboratory of Advanced Polymeric Materials Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
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10
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Lim DSW, Yuan Y, Zhang Y. pH-Degradable Polymers as Impermanent Antimicrobial Agents for Environmental Sustainability. ACS APPLIED BIO MATERIALS 2021; 4:1544-1551. [DOI: 10.1021/acsabm.0c01402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Diane S. W. Lim
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos #07-01, Singapore 138669, Singapore
| | - Yuan Yuan
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos #07-01, Singapore 138669, Singapore
| | - Yugen Zhang
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos #07-01, Singapore 138669, Singapore
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11
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Abstract
We designed and synthesized antimicrobial compounds effective in killing pan-drug-resistant bacterial pathogens. These compounds have a large therapeutic window due to their low mammalian cell toxicity. A lead compound showed efficacy in treating murine model S. aureus and P. aeruginosa infections. In the case of the obligate respiratory bacterium P. aeruginosa we were unable to evolve strains resistant to these compounds. This paper points toward the potential of this type of compound to deal with the current threat of pan-resistant pathogens. For a myriad of different reasons most antimicrobial peptides (AMPs) have failed to reach clinical application. Different AMPs have different shortcomings including but not limited to toxicity issues, potency, limited spectrum of activity, or reduced activity in situ. We synthesized several cationic peptide mimics, main-chain cationic polyimidazoliums (PIMs), and discovered that, although select PIMs show little acute mammalian cell toxicity, they are potent broad-spectrum antibiotics with activity against even pan-antibiotic-resistant gram-positive and gram-negative bacteria, and mycobacteria. We selected PIM1, a particularly potent PIM, for mechanistic studies. Our experiments indicate PIM1 binds bacterial cell membranes by hydrophobic and electrostatic interactions, enters cells, and ultimately kills bacteria. Unlike cationic AMPs, such as colistin (CST), PIM1 does not permeabilize cell membranes. We show that a membrane electric potential is required for PIM1 activity. In laboratory evolution experiments with the gram-positive Staphylococcus aureus we obtained PIM1-resistant isolates most of which had menaquinone mutations, and we found that a site-directed menaquinone mutation also conferred PIM1 resistance. In similar experiments with the gram-negative pathogen Pseudomonas aeruginosa, PIM1-resistant mutants did not emerge. Although PIM1 was efficacious as a topical agent, intraperitoneal administration of PIM1 in mice showed some toxicity. We synthesized a PIM1 derivative, PIM1D, which is less hydrophobic than PIM1. PIM1D did not show evidence of toxicity but retained antibacterial activity and showed efficacy in murine sepsis infections. Our evidence indicates the PIMs have potential as candidates for development of new drugs for treatment of pan-resistant bacterial infections.
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Qiu H, Si Z, Luo Y, Feng P, Wu X, Hou W, Zhu Y, Chan-Park MB, Xu L, Huang D. The Mechanisms and the Applications of Antibacterial Polymers in Surface Modification on Medical Devices. Front Bioeng Biotechnol 2020; 8:910. [PMID: 33262975 PMCID: PMC7686044 DOI: 10.3389/fbioe.2020.00910] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 07/15/2020] [Indexed: 01/04/2023] Open
Abstract
Medical device contamination caused by microbial pathogens such as bacteria and fungi has posed a severe threat to the patients' health in hospitals. Due to the increasing resistance of pathogens to antibiotics, the efficacy of traditional antibiotics treatment is gradually decreasing for the infection treatment. Therefore, it is urgent to develop new antibacterial drugs to meet clinical or civilian needs. Antibacterial polymers have attracted the interests of researchers due to their unique bactericidal mechanism and excellent antibacterial effect. This article reviews the mechanism and advantages of antimicrobial polymers and the consideration for their translation. Their applications and advances in medical device surface coating were also reviewed. The information will provide a valuable reference to design and develop antibacterial devices that are resistant to pathogenic infections.
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Affiliation(s)
- Haofeng Qiu
- School of Medicine, Ningbo University, Ningbo, China
| | - Zhangyong Si
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
| | - Yang Luo
- School of Medicine, Ningbo University, Ningbo, China
| | - Peipei Feng
- School of Medicine, Ningbo University, Ningbo, China
| | - Xujin Wu
- School of Medicine, Ningbo University, Ningbo, China
| | - Wenjia Hou
- School of Medicine, Ningbo University, Ningbo, China
| | - Yabin Zhu
- School of Medicine, Ningbo University, Ningbo, China
| | - Mary B. Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
| | - Long Xu
- Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo, China
| | - Dongmei Huang
- Ningbo Baoting Biotechnology Co., Ltd., Ningbo, China
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13
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Yuan Y, Shi W, Li R, Lim DSW, Armugam A, Zhang Y. Rational Design of Gram-Specific Antimicrobial Imidazolium Tetramers To Combat MRSA. ACS Biomater Sci Eng 2020; 6:5563-5570. [PMID: 33320560 DOI: 10.1021/acsbiomaterials.0c01248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Antimicrobial resistance poses an increasingly serious global health threat. Hence, new antimicrobials with low propensity toward inducing resistance in bacteria are being developed to combat this threat. In this work, a series of imidazolium tetramers have been synthesized by modulating the linkers between imidazoliums or the length of the end groups within the structures of oligomers in order to optimize the activity, selectivity, and biocompatibility of the compounds. These new materials possess high biocompatibility, Gram selectivity, and high efficacy against the selected bacterium as well as clinically isolated methicillin-resistant Staphylococcus aureus species without inducing drug resistance. Therefore, we believe that these compounds can potentially be used to mitigate resistance as highly effective disinfectants in healthcare products or as antimicrobial therapies specifically for Gram-positive bacterial infections.
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Affiliation(s)
- Yuan Yuan
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos #04-01, Singapore 138669, Singapore
| | - Weiwei Shi
- 2nd Hospital of Dalian Medical University, Dalian 116023, China
| | - Ruihua Li
- 2nd Hospital of Dalian Medical University, Dalian 116023, China
| | - Diane S W Lim
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos #04-01, Singapore 138669, Singapore
| | - Arunmozhiarasi Armugam
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos #04-01, Singapore 138669, Singapore
| | - Yugen Zhang
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos #04-01, Singapore 138669, Singapore
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14
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O'Harra KE, Bara JE. Toward controlled functional sequencing and hierarchical structuring in imidazolium ionenes. POLYM INT 2020. [DOI: 10.1002/pi.6109] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Kathryn E O'Harra
- Department of Chemical and Biological Engineering University of Alabama Tuscaloosa AL USA
| | - Jason E Bara
- Department of Chemical and Biological Engineering University of Alabama Tuscaloosa AL USA
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15
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Fu X, Yu J, Dai N, Huang Y, Lv F, Liu L, Wang S. Optical Tuning of Antibacterial Activity of Photoresponsive Antibiotics. ACS APPLIED BIO MATERIALS 2020; 3:4751-4755. [DOI: 10.1021/acsabm.0c00877] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Xuancheng Fu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- College of Chemistry, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Jiamu Yu
- The Experimental High School Attached to Beijing Normal University, Beijing 100032, P. R. China
| | - Nan Dai
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Yiming Huang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Fengting Lv
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Libing Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Shu Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- College of Chemistry, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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16
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Highly efficient imidazolium-containing oligomers for preventing MRSA biofilm and postoperative spinal infection. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109910] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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17
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Jiang W, Xiao X, Wu Y, Zhang W, Cong Z, Liu J, Chen S, Zhang H, Xie J, Deng S, Chen M, Wang Y, Shao X, Dai Y, Sun Y, Fei J, Liu R. Peptide polymer displaying potent activity against clinically isolated multidrug resistant Pseudomonas aeruginosa in vitro and in vivo. Biomater Sci 2020; 8:739-745. [PMID: 31782423 DOI: 10.1039/c9bm01726g] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Multidrug resistant (MDR) Pseudomonas aeruginosa has caused serious nosocomial infections owing to its high intrinsic resistance and ease of acquiring resistance to common antibiotics. There is an urgent need to develop antimicrobial agents against MDR Pseudomonas aeruginosa. Here we report a 27-mer peptide polymer 90 : 10 DLL : BLG, as a synthetic mimic of a host defense peptide, that displayed potent in vitro and in vivo activities against multiple strains of clinically isolated MDR Pseudomonas aeruginosa, performing even better than antibiotics within our study. This peptide polymer also showed negligible hemolysis and low cytotoxicity, as well as quick bacterial killing efficacy. The structural diversity of peptide polymers, their easy synthesis from lithium hexamethyldisilazide-initiated fast N-carboxyanhydride polymerization, and the excellent reproducibility of their chemical structure and biological profiles altogether suggested great potential for antimicrobial applications of peptide polymers as synthetic mimics of host defense peptides.
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Affiliation(s)
- Weinan Jiang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
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18
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Structural design of microbicidal cationic oligomers and their synergistic interaction with azoles against Candida albicans. Sci Rep 2019; 9:11885. [PMID: 31417167 PMCID: PMC6695401 DOI: 10.1038/s41598-019-48322-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 08/01/2019] [Indexed: 12/13/2022] Open
Abstract
Membrane-disrupting synthetic antimicrobial polymers have been well developed as antimicrobial peptide (AMP) mimics to mitigate antimicrobial resistance (AMR). However, synthetic polymers possess inherent drawbacks, being a mixture of different chain lengths, which restricts their clinical applications. In fact, synthetic oligomers with defined chain length and molecular structure could be better representatives of AMPs. Herein, a series of novel imidazolium-ammonium oligomers developed in this work exhibit excellent broad spectrum antimicrobial activity, specifically the salient structure dependent high efficiency against C. albicans. Moreover, synergistic effect emerged when the combined azoles and synthetic oligomers were applied against C. albicans. The detail structural coupling between azoles and oligomers was scrutinized through molecular dynamics simulations to unravel the interaction details with the atomistic resolution. The labile interaction between oligomer and azoles facilitated the transfer of drug into fungal cells, which can be a synergistic solution to prevent the development of resistance on C. albicans.
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19
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Yuan Y, Liang S, Li J, Zhang S, Zhang Y. Copolymers with both soft and rigid cationic rings as highly selective antimicrobials to combat antibiotic resistant microbes and biofilms. J Mater Chem B 2019; 7:5620-5625. [PMID: 31508648 DOI: 10.1039/c9tb01264h] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A new series of main-chain copolymers constructed by linkage of both soft and rigid cationic rings demonstrate good biocompatibility, high antimicrobial efficacy and lower propensity to develop resistance against a broad range of microbes.
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Affiliation(s)
- Yuan Yuan
- Institute of Bioengineering and Nanotechnology
- Singapore 138669
- Singapore
| | | | - Jiangbi Li
- Department of the Spine Surgery
- 1st Hospital of Jilin University
- Changchun 130021
- China
| | - Shaokun Zhang
- Department of the Spine Surgery
- 1st Hospital of Jilin University
- Changchun 130021
- China
| | - Yugen Zhang
- Institute of Bioengineering and Nanotechnology
- Singapore 138669
- Singapore
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