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Wei G, Yue Feng MT, Si Z, Chan-Park MB. Single-Cell Oral Delivery Platform for Enhanced Acid Resistance and Intestinal Adhesion. ACS Appl Mater Interfaces 2024. [PMID: 38640442 DOI: 10.1021/acsami.4c00348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/21/2024]
Abstract
Oral delivery of cells, such as probiotics and vaccines, has proved to be inefficient since cells are generally damaged in an acidic stomach prior to arrival at the intestine to exert their health benefits. In addition, short retention in the intestine is another obstacle which affects inefficiency. To overcome these obstacles, a cell-in-shell structure was designed with pH-responsive and mucoadhesive properties. The pH-responsive shell consisting of three cationic layers of chitosan and three anionic layers of trans-cinnamic acid (t-CA) was made via layer-by-layer (LbL) assembly. t-CA layers are hydrophobic and impermeable to protons in acid, thus enhancing cell gastric resistance in the stomach, while chitosan layers endow strong interaction between the cell surface and the mucosal wall which facilitates cell mucoadhesion in the intestine. Two model cells, probiotic L. rhamnosus GG and dead Streptococcus iniae, which serve as inactivated whole-cell vaccine were chosen to test the design. Increased survival and retention during oral administration were observed for coated cells as compared with naked cells. Partial removal of the coating (20-60% removal) after acid treatment indicates that the coated vaccine can expose its surface immunogenic protein after passage through the stomach, thus facilitating vaccine immune stimulation in the intestine. As a smart oral delivery platform, this design can be extended to various macromolecules, thus providing a promising strategy to formulate oral macromolecules in the prevention and treatment of diseases at a cellular level.
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Affiliation(s)
- Guangmin Wei
- NTU Food Technology Centre, Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University (NTU), Singapore 637459, Singapore
| | - Moon Tay Yue Feng
- NTU Food Technology Centre, Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University (NTU), Singapore 637459, Singapore
| | - Zhangyong Si
- NTU Food Technology Centre, Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University (NTU), Singapore 637459, Singapore
| | - Mary B Chan-Park
- NTU Food Technology Centre, Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University (NTU), Singapore 637459, Singapore
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2
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Ooi YJ, Huang C, Lau K, Chew SY, Park JG, Chan-Park MB. Nontoxic, Biodegradable Hyperbranched Poly(β-amino ester)s for Efficient siRNA Delivery and Gene Silencing. ACS Appl Mater Interfaces 2024; 16:14093-14112. [PMID: 38449351 DOI: 10.1021/acsami.3c10620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
RNA interference (RNAi)-mediated gene silencing is a promising therapeutic approach to treat various diseases, but safe and efficient delivery remains a major challenge to its clinical application. Non-viral gene vectors, such as poly(β-amino esters) (pBAEs), have emerged as a potential candidate due to their biodegradability, low toxicity profile, ease of synthesis, and high gene transfection efficiency for both DNA and siRNA delivery. However, achieving significant gene silencing using pBAEs often requires a large amount of polymer carrier (with polymer/siRNA weight ratio >100) or high siRNA dose (>100 nM), which might potentially exacerbate toxicity concerns during delivery. To overcome these barriers, we designed and optimized a series of hyperbranched pBAEs capable of efficiently condensing siRNA and achieving excellent silencing efficiency at a lower polymer/siRNA weight ratio (w/w) and siRNA dose. Through modulation of monomer combinations and branching density, we identified the top-performing hyperbranched pBAEs, named as h(A2B3)-1, which possess good siRNA condensation ability, low cytotoxicity, and high cellular uptake efficiency. Compared with Lipofectamine 2000, h(A2B3)-1 achieved lower cytotoxicity and higher siRNA silencing efficiency in HeLa cells at a polymer/siRNA weight ratio of 30 and 30 nM siRNA dose. Notably, h(A2B3)-1 enhanced the gene uptake in primary neural cells and effectively silenced the target gene in hard-to-transfect primary cortical neurons and oligodendrocyte progenitor cells, with gene knockdown efficiencies of 34.8 and 53.4% respectively. By incorporating a bioreducible disulfide compartment into the polymer backbone, the cytocompatibility of the h(A2B3)-1 was greatly enhanced while maintaining their good transfection efficiency. Together, the low cytotoxicity and high siRNA transfection efficiency of hyperbranched h(A2B3)-1 in this study demonstrated their great potential as a non-viral gene vector for efficient siRNA delivery and RNAi-mediated gene silencing. This provides valuable insight into the future development of safe and efficient non-viral siRNA delivery systems as well as their translation into clinical applications.
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Affiliation(s)
- Ying Jie Ooi
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637459, Singapore
| | - Chongquan Huang
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637459, Singapore
- Neuroscience@NTU, Interdisciplinary Graduate Programme, Nanyang Technological University, Singapore 637459, Singapore
| | - Kieran Lau
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637459, Singapore
| | - Sing Yian Chew
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637459, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 636921, Singapore
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Jong Gu Park
- Welgene Inc, 693, Namcheon-ro, Namcheon-myeon, Gyeongsan-si, Gyeongsangbuk-do 38695, Republic of Korea
| | - Mary B Chan-Park
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637459, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 636921, Singapore
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3
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Pranantyo D, Yeo CK, Wu Y, Fan C, Xu X, Yip YS, Vos MIG, Mahadevegowda SH, Lim PLK, Yang L, Hammond PT, Leavesley DI, Tan NS, Chan-Park MB. Hydrogel dressings with intrinsic antibiofilm and antioxidative dual functionalities accelerate infected diabetic wound healing. Nat Commun 2024; 15:954. [PMID: 38296937 PMCID: PMC10830466 DOI: 10.1038/s41467-024-44968-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 01/11/2024] [Indexed: 02/02/2024] Open
Abstract
Chronic wounds are often infected with biofilm bacteria and characterized by high oxidative stress. Current dressings that promote chronic wound healing either require additional processes such as photothermal irradiation or leave behind gross amounts of undesirable residues. We report a dual-functionality hydrogel dressing with intrinsic antibiofilm and antioxidative properties that are synergistic and low-leaching. The hydrogel is a crosslinked network with tethered antibacterial cationic polyimidazolium and antioxidative N-acetylcysteine. In a murine diabetic wound model, the hydrogel accelerates the closure of wounds infected with methicillin-resistant Staphylococcus aureus or carbapenem-resistant Pseudomonas aeruginosa biofilm. Furthermore, a three-dimensional ex vivo human skin equivalent model shows that N-acetylcysteine promotes the keratinocyte differentiation and accelerates the re-epithelialization process. Our hydrogel dressing can be made into different formats for the healing of both flat and deep infected chronic wounds without contamination of the wound or needing other modalities such as photothermal irradiation.
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Affiliation(s)
- Dicky Pranantyo
- Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
- Antimicrobial Resistance Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology, Singapore, 138602, Singapore
| | - Chun Kiat Yeo
- Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
- NTU Institute for Health Technologies, Interdisciplinary Graduate School, Nanyang Technological University, Singapore, 637553, Singapore
| | - Yang Wu
- Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Chen Fan
- Skin Research Institute of Singapore, Agency for Science, Technology and Research (A*STAR), 11 Mandalay Road, Singapore, 308232, Singapore
- Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang, 325000, China
| | - Xiaofei Xu
- Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Yun Sheng Yip
- Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, Singapore, 636921, Singapore
| | - Marcus Ivan Gerard Vos
- Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, Singapore, 636921, Singapore
| | - Surendra H Mahadevegowda
- Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Priscilla Lay Keng Lim
- Skin Research Institute of Singapore, Agency for Science, Technology and Research (A*STAR), 11 Mandalay Road, Singapore, 308232, Singapore
| | - Liang Yang
- School of Medicine, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Paula T Hammond
- Antimicrobial Resistance Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology, Singapore, 138602, Singapore
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02142, USA
| | - David Ian Leavesley
- Skin Research Institute of Singapore, Agency for Science, Technology and Research (A*STAR), 11 Mandalay Road, Singapore, 308232, Singapore
| | - Nguan Soon Tan
- Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, Singapore, 636921, Singapore.
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore.
| | - Mary B Chan-Park
- Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore.
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4
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Chen Y, Yong M, Li M, Si Z, Koh CH, Lau P, Chang YW, Teo J, Chan-Park MB, Gan YH. A hydrophilic polyimidazolium antibiotic targeting the membranes of Gram-negative bacteria. J Antimicrob Chemother 2023; 78:2581-2590. [PMID: 37671807 PMCID: PMC10545527 DOI: 10.1093/jac/dkad274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 08/21/2023] [Indexed: 09/07/2023] Open
Abstract
OBJECTIVES The rise of MDR Gram-negative bacteria (GNB), especially those resistant to last-resort drugs such as carbapenems and colistin, is a global health risk and calls for increased efforts to discover new antimicrobial compounds. We previously reported that polyimidazolium (PIM) compounds exhibited significant antimicrobial activity and minimal mammalian cytotoxicity. However, their mechanism of action is relatively unknown. We examined the efficacy and mechanism of action of a hydrophilic PIM (PIM5) against colistin- and meropenem-resistant clinical isolates. METHODS MIC and time-kill testing was performed for drug-resistant Escherichia coli and Klebsiella pneumoniae clinical isolates. N-phenyl-1-naphthylamine and propidium iodide dyes were employed to determine membrane permeabilization. Spontaneous resistant mutants and single deletion mutants were generated to understand potential resistance mechanisms to the drug. RESULTS PIM5 had the same effectiveness against colistin- and meropenem-resistant strains as susceptible strains of GNB. PIM5 exhibited a rapid bactericidal effect independent of bacterial growth phase and was especially effective in water. The polymer disrupts both the outer and cytoplasmic membranes. PIM5 binds and intercalates into bacterial genomic DNA upon entry of cells. GNB do not develop high resistance to PIM5. However, the susceptibility and uptake of the polymer is moderately affected by mutations in the two-component histidine kinase sensor BaeS. PIM5 has negligible cytotoxicity on human cells at bacterial-killing concentrations, comparable to the commercial antibiotics polymyxin B and colistin. CONCLUSIONS PIM5 is a potent broad-spectrum antibiotic targeting GNB resistant to last-resort antibiotics.
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Affiliation(s)
- Yahua Chen
- Infectious Diseases Translational Research Programme, Department of Biochemistry, National University of Singapore, Singapore, Singapore
| | - Melvin Yong
- Infectious Diseases Translational Research Programme, Department of Biochemistry, National University of Singapore, Singapore, Singapore
| | - Ming Li
- Infectious Diseases Translational Research Programme, Department of Biochemistry, National University of Singapore, Singapore, Singapore
| | - Zhangyong Si
- School of Chemistry, Chemical and Biotechnology, Nanyang Technological University, Singapore, Singapore
| | - Chong Hui Koh
- School of Chemistry, Chemical and Biotechnology, Nanyang Technological University, Singapore, Singapore
| | - Pearlyn Lau
- Infectious Diseases Translational Research Programme, Department of Biochemistry, National University of Singapore, Singapore, Singapore
| | - Yi Wei Chang
- Infectious Diseases Translational Research Programme, Department of Biochemistry, National University of Singapore, Singapore, Singapore
| | - Jeanette Teo
- Department of Laboratory Medicine, National University Hospital, Singapore, Singapore
| | - Mary B Chan-Park
- School of Chemistry, Chemical and Biotechnology, Nanyang Technological University, Singapore, Singapore
| | - Yunn-Hwen Gan
- Infectious Diseases Translational Research Programme, Department of Biochemistry, National University of Singapore, Singapore, Singapore
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5
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Wang L, Zhong W, Liu B, Pranantyo D, Chan-Park MB. Cationic Carbon Monoxide-Releasing Polymers as Antimicrobial and Antibiofilm Agents by the Synergetic Activity. ACS Appl Mater Interfaces 2023; 15:41772-41782. [PMID: 37609827 DOI: 10.1021/acsami.3c02898] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
Recent studies indicate that carbon monoxide-releasing molecules (CORMs), a class of organometallic compounds, exert antibacterial activities through the delivery of carbon monoxide (CO) molecules. We developed a new-class CO-delivery system by conjugating classical low-molecular-weight CORMs (i.e., [Ru(CO)3Cl2]2 and Mn(CO)5Br) onto a positively charged carrier, polyimidazolium (PIM), giving cationic CO-releasing polymers Ru@PIM and Mn@PIM, respectively. Compared with low-molecular-weight CORMs, our polymeric CO vehicles showed improved water solubility, reduced cytotoxicity, significantly extended CO-releasing duration, and enhanced antimicrobial ability against both planktonic and biofilm microorganisms. Ru@PIM and Mn@PIM inhibited the growth of a broad spectrum of free Gram-positive and Gram-negative bacteria as well as fungus with the lowest minimum inhibitory concentration (MIC) at 8 μg/mL. They were effective in preventing pathogenic Pseudomonas aeruginosa biofilm formation with biofilm reduction by more than 92% at 16 μg/mL and 99% at 32 μg/mL. They also demonstrated potent dispersal efficacy on recalcitrant well-established biofilms through a synergetic activity with a biofilm log10 reduction of 2.5-3.2 ≥ 64 μg/mL and nearly 2.0 at the concentration of as low as 16 μg/mL. This CO-releasing system may retain long-time antimicrobial ability after the complete release of CO molecules owing to the cationic structure. The novel CO-releasing polymers have great potential as antimicrobial and antibiofilm agents in biomedical applications.
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Affiliation(s)
- Liping Wang
- Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Wenbin Zhong
- Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Bo Liu
- Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Dicky Pranantyo
- Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Mary B Chan-Park
- Centre for Antimicrobial Bioengineering, School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
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6
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Yong M, Kok ZY, Koh CH, Zhong W, Ng JT, Mu Y, Chan-Park MB, Gan YH. Membrane Potential-Dependent Uptake of Cationic Oligoimidazolium Mediates Bacterial DNA Damage and Death. Antimicrob Agents Chemother 2023; 67:e0035523. [PMID: 37125913 DOI: 10.1128/aac.00355-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023] Open
Abstract
The treatment of bacterial infections is becoming increasingly challenging with the emergence of antimicrobial resistance. Thus, the development of antimicrobials with novel mechanisms of action is much needed. Previously, we designed several cationic main-chain imidazolium compounds and identified the polyimidazolium PIM1 as a potent antibacterial against a wide panel of multidrug-resistant nosocomial pathogens, and it had relatively low toxicity against mammalian epithelial cells. However, little is known about the mechanism of action of PIM1. Using an oligomeric version of PIM1 with precisely six repeating units (OIM1-6) to control for consistency, we showed that OIM1-6 relies on an intact membrane potential for entry into the bacterial cytoplasm, as resistant mutants to OIM1-6 have mutations in their electron transport chains. These mutants demonstrate reduced uptake of the compound, which can be circumvented through the addition of a sub-MIC dose of colistin. Once taken up intracellularly, OIM1-6 exerts double-stranded DNA breaks. Its potency and ability to kill represents a promising class of drugs that can be combined with membrane-penetrating drugs to potentiate activity and hedge against the rise of resistant mutants. In summary, we discovered that cationic antimicrobial OIM1-6 exhibits an antimicrobial property that is dissimilar to the conventional cationic antimicrobial compounds. Its killing mechanism does not involve membrane disruption but instead depends on the membrane potential for uptake into bacterial cells so that it can exert its antibacterial effect intracellularly.
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Affiliation(s)
- Melvin Yong
- Department of Biochemistry, Infectious Diseases Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Zhi Y Kok
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, Singapore
- Centre for Antimicrobial Bioengineering, Nanyang Technological University, Singapore, Singapore
| | - Chong H Koh
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, Singapore
- Centre for Antimicrobial Bioengineering, Nanyang Technological University, Singapore, Singapore
| | - Wenbin Zhong
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, Singapore
- Centre for Antimicrobial Bioengineering, Nanyang Technological University, Singapore, Singapore
| | - Justin Ty Ng
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Yuguang Mu
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Mary B Chan-Park
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore, Singapore
- Centre for Antimicrobial Bioengineering, Nanyang Technological University, Singapore, Singapore
| | - Yunn-Hwen Gan
- Department of Biochemistry, Infectious Diseases Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
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7
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Si Z, Li J, Ruan L, Reghu S, Ooi YJ, Li P, Zhu Y, Hammond PT, Verma CS, Bazan GC, Pethe K, Chan-Park MB. Designer co-beta-peptide copolymer selectively targets resistant and biofilm Gram-negative bacteria. Biomaterials 2023; 294:122004. [PMID: 36669302 DOI: 10.1016/j.biomaterials.2023.122004] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 12/15/2022] [Accepted: 01/13/2023] [Indexed: 01/15/2023]
Abstract
New antimicrobials are urgently needed to combat Gram-negative bacteria, particularly multi-drug resistant (MDR) and phenotypically resistant biofilm species. At present, only sequence-defined alpha-peptides (e.g. polymyxin B) can selectively target Gram-negative bacterial lipopolysaccharides. We show that a copolymer, without a defined sequence, shows good potency against MDR Gram-negative bacteria including its biofilm form. The tapered blocky co-beta-peptide with controlled N-terminal hydrophobicity (#4) has strong interaction with the Gram-negative bacterial lipopolysaccharides via its backbone through electrostatic and hydrogen bonding interactions but not the Gram-positive bacterial and mammalian cell membranes so that this copolymer is non-toxic to these two latter cell types. The new #4 co-beta-peptide selectively kills Gram-negative bacteria with low cytotoxicity both in vitro and in a mouse biofilm wound infection model. This strategy provides a new concept for the design of Gram-negative selective antimicrobial peptidomimetics against MDR and biofilm species.
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Affiliation(s)
- Zhangyong Si
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 637459, Singapore
| | - Jianguo Li
- Bioinformatics Institute, A*STAR, 30 Biopolis Street, Matrix, 138671, Singapore; Singapore Eye Research Institute, 169856, Singapore
| | - Lin Ruan
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 637459, Singapore
| | - Sheethal Reghu
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 637459, Singapore
| | - Ying Jie Ooi
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 637459, Singapore
| | - Peng Li
- Frontiers Science Center for Flexible Electronics, Northwestern Polytechnical University, 710072, China
| | - Yabin Zhu
- Medical School of Ningbo University, 315211, China
| | - Paula T Hammond
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA; Infectious Diseases Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology (SMART) , 138602, Singapore
| | - Chandra S Verma
- Bioinformatics Institute, A*STAR, 30 Biopolis Street, Matrix, 138671, Singapore; Department of Biological Sciences, National University of Singapore, 117558, Singapore; School of Biological Sciences, Nanyang Technological University, 637551, Singapore
| | - Guillermo C Bazan
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106-9510, USA; Departments of Chemistry and Chemical & Biomolecular Engineering, National University of Singapore, 117543, Singapore.
| | - Kevin Pethe
- Lee Kong Chian School of Medicine, Nanyang Technological University, 636921, Singapore; Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, 637551, Singapore.
| | - Mary B Chan-Park
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 637459, Singapore; Lee Kong Chian School of Medicine, Nanyang Technological University, 636921, Singapore.
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8
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Si Z, Pethe K, Chan-Park MB. Chemical Basis of Combination Therapy to Combat Antibiotic Resistance. JACS Au 2023; 3:276-292. [PMID: 36873689 PMCID: PMC9975838 DOI: 10.1021/jacsau.2c00532] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 11/10/2022] [Accepted: 11/10/2022] [Indexed: 06/10/2023]
Abstract
The antimicrobial resistance crisis is a global health issue requiring discovery and development of novel therapeutics. However, conventional screening of natural products or synthetic chemical libraries is uncertain. Combination therapy using approved antibiotics with inhibitors targeting innate resistance mechanisms provides an alternative strategy to develop potent therapeutics. This review discusses the chemical structures of effective β-lactamase inhibitors, outer membrane permeabilizers, and efflux pump inhibitors that act as adjuvant molecules of classical antibiotics. Rational design of the chemical structures of adjuvants will provide methods to impart or restore efficacy to classical antibiotics for inherently antibiotic-resistant bacteria. As many bacteria have multiple resistance pathways, adjuvant molecules simultaneously targeting multiple pathways are promising approaches to combat multidrug-resistant bacterial infections.
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Affiliation(s)
- Zhangyong Si
- School
of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637459
| | - Kevin Pethe
- Lee
Kong Chian School of Medicine, Nanyang Technological
University, Singapore 636921
- Singapore
Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore 637551
| | - Mary B. Chan-Park
- School
of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637459
- Lee
Kong Chian School of Medicine, Nanyang Technological
University, Singapore 636921
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9
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Si Z, Zhong W, Prananty D, Li J, Koh CH, Kang ET, Pethe K, Chan-Park MB. Correction: Polymers as advanced antibacterial and antibiofilm agents for direct and combination therapies. Chem Sci 2023; 14:4434. [PMID: 37123184 PMCID: PMC10132088 DOI: 10.1039/d3sc90061d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 03/28/2023] [Indexed: 04/08/2023] Open
Abstract
Correction for ‘Polymers as advanced antibacterial and antibiofilm agents for direct and combination therapies’ by Zhangyong Si et al., Chem. Sci., 2022, 13, 345–364, https://doi.org/10.1039/D1SC05835E.
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Affiliation(s)
- Zhangyong Si
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
| | - Wenbin Zhong
- 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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10
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Pranantyo D, Zhang K, Si Z, Hou Z, Chan-Park MB. Smart Multifunctional Polymer Systems as Alternatives or Supplements of Antibiotics To Overcome Bacterial Resistance. Biomacromolecules 2022; 23:1873-1891. [PMID: 35471022 DOI: 10.1021/acs.biomac.1c01614] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In recent years, infectious diseases have again become a critical threat to global public health largely due to the challenges posed by antimicrobial resistance. Conventional antibiotics have played a crucial role in combating bacterial infections; however, their efficacy is significantly impaired by widespread drug resistance. Natural antimicrobial peptides (AMPs) and their polymeric mimics demonstrate great potential for killing bacteria with low propensity of resistance as they target the microbial membrane rather than a specific molecular target, but they are also toxic to the host eukaryotic cells. To minimize antibiotics systemic spread and the required dose that promote resistance and to advocate practical realization of the promising activity of AMPs and polymers, smart systems to target bacteria are highly sought after. This review presents bacterial recognition by various specific targeting molecules and the delivery systems of active components in supramolecules. Bacteria-induced activations of antimicrobial-based nanoformulations are also included. Recent advances in the bacteria targeting and delivery of synthetic antimicrobial agents may assist in developing new classes of highly selective antimicrobial systems which can improve bactericidal efficacy and greatly minimize the spread of bacterial resistance.
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11
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Ma J, Hou S, Lu D, Zhang B, Xiong Q, Chan-Park MB, Duan H. Caging Cationic Polymer Brush-Coated Plasmonic Nanostructures for Traceable Selective Antimicrobial Activities. Macromol Rapid Commun 2022; 43:e2100812. [PMID: 35394089 DOI: 10.1002/marc.202100812] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 03/22/2022] [Indexed: 12/26/2022]
Abstract
Cationic polymers are under intense research to achieve prominent antimicrobial activity. However, the cellular and in vivo toxicity caused by nonspecific electrostatic interaction has become a major challenge for their practical applications. Here, the development of a "caging" strategy based on the use of a block copolymer consisting of a stealth block and an anionic block that undergoes degradation in presence of enzymes secreted by selective bacterial pathogens of interest is reported. The results have shown that antimicrobial cationic polymer brushes-coated gold nanorods (AuNRs) can be caged by the block polymer of poly(ethylene glycol) and anionic, lipase-degradable block of ε-caprolactone and methacrylic acid copolymer to afford neutrally charged surfaces. The caged AuNRs are activated by lipase released by bacteria of interest to endow an excellent bactericidal effect but show minimal binding and toxicity against mammalian cells and nonspecific bacteria that do not produce lipase. In this design, AuNRs play multifunctional roles as the scaffolds for polymer brushes, photothermal transducers, and imaging probes for traceable delivery of the activation and delivery of bactericidal cationic polymer brushes. The caging strategy opens new opportunities for the safe delivery of antimicrobial materials for the treatment of bacterial infections.
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Affiliation(s)
- Jielin Ma
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637457, Singapore
| | - Shuai Hou
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637457, Singapore
| | - Derong Lu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637457, Singapore
| | - Bo Zhang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637457, Singapore
| | - Qirong Xiong
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637457, Singapore
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637457, Singapore
| | - Hongwei Duan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637457, Singapore
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12
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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13
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Aytac Z, Xu J, Raman Pillai SK, Eitzer BD, Xu T, Vaze N, Ng KW, White JC, Chan-Park MB, Luo Y, Demokritou P. Enzyme- and Relative Humidity-Responsive Antimicrobial Fibers for Active Food Packaging. ACS Appl Mater Interfaces 2021; 13:50298-50308. [PMID: 34648257 DOI: 10.1021/acsami.1c12319] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Active food packaging materials that are sustainable, biodegradable, and capable of precise delivery of antimicrobial active ingredients (AIs) are in high demand. Here, we report the development of novel enzyme- and relative humidity (RH)-responsive antimicrobial fibers with an average diameter of 225 ± 50 nm, which can be deposited as a functional layer for packaging materials. Cellulose nanocrystals (CNCs), zein (protein), and starch were electrospun to form multistimuli-responsive fibers that incorporated a cocktail of both free nature-derived antimicrobials such as thyme oil, citric acid, and nisin and cyclodextrin-inclusion complexes (CD-ICs) of thyme oil, sorbic acid, and nisin. The multistimuli-responsive fibers were designed to release the free AIs and CD-ICs of AIs in response to enzyme and RH triggers, respectively. Enzyme-responsive release of free AIs is achieved due to the degradation of selected polymers, forming the backbone of the fibers. For instance, protease enzyme can degrade zein polymer, further accelerating the release of AIs from the fibers. Similarly, RH-responsive release is obtained due to the unique chemical nature of CD-ICs, enabling the release of AIs from the cavity at high RH. The successful synthesis of CD-ICs of AIs and incorporation of antimicrobials in the structure of the multistimuli-responsive fibers were confirmed by X-ray diffraction and Fourier transform infrared spectrometry. Fibers were capable of releasing free AIs when triggered by microorganism-exudated enzymes in a dose-dependent manner and releasing CD-IC form of AIs in response to high relative humidity (95% RH). With 24 h of exposure, stimuli-responsive fibers significantly reduced the populations of foodborne pathogenic bacterial surrogates Escherichia coli (by ∼5 log unit) and Listeria innocua (by ∼5 log unit), as well as fungi Aspergillus fumigatus (by >1 log unit). More importantly, the fibers released more AIs at 95% RH than at 50% RH, which resulted in a higher population reduction of E. coli at 95% RH. Such biodegradable, nontoxic, and multistimuli-responsive antimicrobial fibers have great potential for broad applications as active and smart packaging systems.
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Affiliation(s)
- Zeynep Aytac
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health, Harvard T. H. Chan School of Public Health, Harvard University, Boston, Massachusetts 02115, United States
| | - Jie Xu
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health, Harvard T. H. Chan School of Public Health, Harvard University, Boston, Massachusetts 02115, United States
| | | | - Brian D Eitzer
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, New Haven, Connecticut 06504, United States
| | - Tao Xu
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health, Harvard T. H. Chan School of Public Health, Harvard University, Boston, Massachusetts 02115, United States
| | - Nachiket Vaze
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health, Harvard T. H. Chan School of Public Health, Harvard University, Boston, Massachusetts 02115, United States
| | - Kee Woei Ng
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health, Harvard T. H. Chan School of Public Health, Harvard University, Boston, Massachusetts 02115, United States
- School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore
- Environmental Chemistry and Materials Centre, Nanyang Environment and Water Research Institute, 637141 Singapore
| | - Jason C White
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, New Haven, Connecticut 06504, United States
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 637457 Singapore
| | - Yaguang Luo
- Environmental Microbiology and Food Safety Laboratory, U.S. Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, 10300 Baltimore Avenue, Beltsville, Maryland 20705, United States
| | - Philip Demokritou
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health, Harvard T. H. Chan School of Public Health, Harvard University, Boston, Massachusetts 02115, United States
- School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore
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14
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Ang MCY, Dhar N, Khong DT, Lew TTS, Park M, Sarangapani S, Cui J, Dehadrai A, Singh GP, Chan-Park MB, Sarojam R, Strano M. Nanosensor Detection of Synthetic Auxins In Planta using Corona Phase Molecular Recognition. ACS Sens 2021; 6:3032-3046. [PMID: 34375072 DOI: 10.1021/acssensors.1c01022] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Synthetic auxins such as 1-naphthalene acetic acid (NAA) and 2,4-dichlorophenoxyacetic acid (2,4-D) have been extensively used in plant tissue cultures and as herbicides because they are chemically more stable and potent than most endogenous auxins. A tool for rapid in planta detection of these compounds will enhance our knowledge about hormone distribution and signaling and facilitate more efficient usage of synthetic auxins in agriculture. In this work, we show the development of real-time and nondestructive in planta NAA and 2,4-D nanosensors based on the concept of corona phase molecular recognition (CoPhMoRe), to replace the current state-of-the-art sensing methods that are destructive and laborious. By designing a library of cationic polymers wrapped around single-walled carbon nanotubes with general affinity for chemical moieties displayed on auxins and its derivatives, we developed selective sensors for these synthetic auxins, with a particularly large quenching response to NAA (46%) and a turn-on response to 2,4-D (51%). The NAA and 2,4-D nanosensors are demonstrated in planta across several plant species including spinach, Arabidopsis thaliana (A. thaliana), Brassica rapa subsp. chinensis (pak choi), and Oryza sativa (rice) grown in various media, including soil, hydroponic, and plant tissue culture media. After 5 h of 2,4-D supplementation to the hydroponic medium, 2,4-D is seen to accumulate in susceptible dicotyledon pak choi leaves, while no uptake is observed in tolerant monocotyledon rice leaves. As such, the 2,4-D nanosensor had demonstrated its capability for rapid testing of herbicide susceptibility and could help elucidate the mechanisms of 2,4-D transport and the basis for herbicide resistance in crops. The success of the CoPhMoRe technique for measuring these challenging plant hormones holds tremendous potential to advance the plant biology study.
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Affiliation(s)
- Mervin Chun-Yi Ang
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-06/07/08 Research Wing, Singapore 138602, Singapore
| | - Niha Dhar
- Temasek Life Sciences Laboratory Limited, 1 Research Link National University of Singapore, Singapore 117604, Singapore
| | - Duc Thinh Khong
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-06/07/08 Research Wing, Singapore 138602, Singapore
| | - Tedrick Thomas Salim Lew
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Singapore 138634, Singapore
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, Singapore
| | - Minkyung Park
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Sreelatha Sarangapani
- Temasek Life Sciences Laboratory Limited, 1 Research Link National University of Singapore, Singapore 117604, Singapore
| | - Jianqiao Cui
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Aniket Dehadrai
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Gajendra Pratap Singh
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-06/07/08 Research Wing, Singapore 138602, Singapore
| | - Mary B. Chan-Park
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-06/07/08 Research Wing, Singapore 138602, Singapore
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore
| | - Rajani Sarojam
- Temasek Life Sciences Laboratory Limited, 1 Research Link National University of Singapore, Singapore 117604, Singapore
| | - Michael Strano
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-06/07/08 Research Wing, Singapore 138602, Singapore
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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15
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Ma J, Hou S, Chan-Park MB, Duan H. Antibiofilm Activity of Gallium(III) Complexed Anionic Polymers in Combination with Antibiotics. Macromol Rapid Commun 2021; 42:e2100255. [PMID: 34418208 DOI: 10.1002/marc.202100255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 07/05/2021] [Indexed: 11/11/2022]
Abstract
Pseudomonas aeruginosa (P. aeruginosa) is a life-threatening pathogen associated with multiantibiotic resistance, which is largely caused by its strong ability to form biofilms. Recent research has revealed that gallium (III) shows an activity against the biofilm of P. aeruginosa by interfering with Fe metabolism. The antibacterial activity of the combination of Ga3+ ion and antibiotic rifampicin (RMP) against P. aeruginosa PAO1 is investigated. An anionic polymer poly{{2-[(2-methylprop-2-enoyl)oxy]ethyl}phosphonic acid} (PDMPOH) is exploited to form complexes (GaPD) with Ga3+ . The GaPD complexes act as a carrier of Ga3+ and release Ga3+ via enzymatic degradation by bacterial lipases. GaPD is found to damage the outer membrane, leading to enhanced cellular uptake of RMP and Ga3+ due to increased outer membrane permeability, which inhibits the RNA polymerase and interferes with Fe metabolism. The antibiofilm activity and biocompatibility of the GaPD system offer a promising treatment option for P. aeruginosa biofilm-related infections.
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Affiliation(s)
- Jielin Ma
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore, 637457, Singapore
| | - Shuai Hou
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore, 637457, Singapore
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore, 637457, Singapore
| | - Hongwei Duan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore, 637457, Singapore
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16
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Wang Z, Cong TD, Zhong W, Lau JW, Kwek G, Chan-Park MB, Xing B. Cyanine-Dyad Molecular Probe for the Simultaneous Profiling of the Evolution of Multiple Radical Species During Bacterial Infections. Angew Chem Int Ed Engl 2021; 60:16900-16905. [PMID: 34018295 DOI: 10.1002/anie.202104100] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/12/2021] [Indexed: 12/16/2022]
Abstract
Real-time monitoring of the evolution of bacterial infection-associated multiple radical species is critical to accurately profile the pathogenesis and host-defense mechanisms. Here, we present a unique dual wavelength near-infrared (NIR) cyanine-dyad molecular probe (HCy5-Cy7) for simultaneous monitoring of reactive oxygen and nitrogen species (RONS) variations both in vitro and in vivo. HCy5-Cy7 specifically turns on its fluorescence at 660 nm via superoxide or hydroxyl radical (O2 .- , . OH)-mediated oxidation of reduced HCy5 moiety to Cy5, while peroxynitrite or hypochlorous species (ONOO- , ClO- )-induced Cy7 structural degradation causes the emission turn-off at 800 nm. Such multispectral but reverse signal responses allow multiplex manifestation of in situ oxidative and nitrosative stress events during the pathogenic and defensive processes in both bacteria-infected macrophage cells and living mice. Most importantly, this study may also provide new perspectives for understanding the bacterial pathogenesis and advancing the precision medicine against infectious diseases.
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Affiliation(s)
- Zhimin Wang
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 21 Nanyang link, 637371, Singapore, Singapore
| | - Thang Do Cong
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 21 Nanyang link, 637371, Singapore, Singapore
| | - Wenbin Zhong
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459, Singapore, Singapore
| | - Jun Wei Lau
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 21 Nanyang link, 637371, Singapore, Singapore
| | - Germain Kwek
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 21 Nanyang link, 637371, Singapore, Singapore
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459, Singapore, Singapore
| | - Bengang Xing
- Division of Chemistry and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 21 Nanyang link, 637371, Singapore, Singapore.,School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, 637459, Singapore, Singapore
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17
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Mahadevegowda SH, Ruan L, Zhang J, Hou S, Raju C, Chan-Park MB. Synthesis of dimeric and tetrameric trithiomannoside clusters through convenient photoinitiated thiol-ene click protocol for efficient inhibition of gram-negative bacteria. J Carbohydr Chem 2021. [DOI: 10.1080/07328303.2021.1928154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Surendra H. Mahadevegowda
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
- Department of Chemistry, School of Sciences, National Institute of Technology Andhra Pradesh, Tadepalligudem, India
| | - Lin Ruan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
| | - Jianhua Zhang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
| | - Shuai Hou
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
| | - Cheerlavancha Raju
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
| | - Mary B. Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
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18
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Zhang K, Raju C, Zhong W, Pethe K, Gründling A, Chan-Park MB. Cationic Glycosylated Block Co-β-peptide Acts on the Cell Wall of Gram-Positive Bacteria as Anti-biofilm Agents. ACS Appl Bio Mater 2021; 4:3749-3761. [PMID: 35006805 DOI: 10.1021/acsabm.0c01241] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Antimicrobial resistance is a global threat. In addition to the emergence of resistance to last resort drugs, bacteria escape antibiotics killing by forming complex biofilms. Strategies to tackle antibiotic resistance as well as biofilms are urgently needed. Wall teichoic acid (WTA), a generic anionic glycopolymer present on the cell surface of many Gram-positive bacteria, has been proposed as a possible therapeutic target, but its druggability remains to be demonstrated. Here we report a cationic glycosylated block co-β-peptide that binds to WTA. By doing so, the co-β-peptide not only inhibits biofilm formation, it also disperses preformed biofilms in several Gram-positive bacteria and resensitizes methicillin-resistant Staphylococcus aureus to oxacillin. The cationic block of the co-β-peptide physically interacts with the anionic WTA within the cell envelope, whereas the glycosylated block forms a nonfouling corona around the bacteria. This reduces physical interaction between bacteria-substrate and bacteria-biofilm matrix, leading to biofilm inhibition and dispersal. The WTA-targeting co-β-peptide is a promising lead for the future development of broad-spectrum anti-biofilm strategies against Gram-positive bacteria.
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Affiliation(s)
- Kaixi Zhang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459.,Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459
| | - Cheerlavancha Raju
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459.,Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459
| | - Wenbin Zhong
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459.,Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459
| | - Kevin Pethe
- Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459.,Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, Singapore 636921.,School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551
| | - Angelika Gründling
- Faculty of Medicine, Department of Infectious Disease, Imperial College London, Flowers Building London, London SW7 2AZ, United Kingdom
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459.,Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459.,Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, Singapore 636921
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19
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Kim CJ, Si Z, Reghu S, Guo Z, Zhang K, Li J, Chan-Park MB. DNA-derived nanostructures selectively capture gram-positive bacteria. Drug Deliv Transl Res 2021; 11:1438-1450. [PMID: 33880733 DOI: 10.1007/s13346-021-00975-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/31/2021] [Indexed: 10/21/2022]
Abstract
We report the first demonstration of the efficient bacteria targeting properties of DNA-based polymeric micelles with high-density DNA corona. Nanoscale polymer micelles derived from DNA-b-polystyrene (DNA-b-PS) efficiently selected most tested Gram-positive strains over Gram-negative strains; single-strand DNAs were 20-fold less selective. We demonstrate that these targeting properties were derived from the interaction between densely packed DNA strands of the micelle corona and the peptidoglycan layers of Gram-positive bacteria. DNA-b-PS micelles incorporating magnetic nanoparticles (MNPs) can efficiently capture and concentrate Gram-positive bacteria suggesting the simple applications of these DNA block copolymer micelles for concentrating bacteria. Adenine (A), thymine (T), cytosine (C), and guanine (G)-rich nanostructures were fabricated, respectively, for investigating the effect of sequence on Gram-selective bacteria targeting. T-rich micelles showed the most efficient targeting properties. The targeting properties of these DNA nanostructures toward Gram-positive bacteria may have applications as a targeted therapeutic delivery system.
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Affiliation(s)
- Chan-Jin Kim
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Nanyang, 637459, Singapore
| | - Zhangyong Si
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Nanyang, 637459, Singapore
| | - Sheethal Reghu
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Nanyang, 637459, Singapore
| | - Zhong Guo
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Nanyang, 637459, Singapore
| | - Kaixi Zhang
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Nanyang, 637459, Singapore
| | - Jianghua Li
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Nanyang, 637459, Singapore
| | - Mary B Chan-Park
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Nanyang, 637459, Singapore. .,Lee Kong Chian School of Medicine, Nanyang Technological University, Nanyang, 636921, Singapore. .,School of Physical & Mathematical Sciences, Nanyang Technological University, Nanyang, 637371, Singapore.
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20
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Pranantyo D, Raju C, Si Z, Xu X, Pethe K, Kang ET, Chan-Park MB. Nontoxic Antimicrobial Cationic Peptide Nanoconstructs with Bacteria-Displaceable Polymeric Counteranions. Nano Lett 2021; 21:899-906. [PMID: 33448223 DOI: 10.1021/acs.nanolett.0c03261] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Antimicrobial peptides that target the integrity of bacterial envelopes can eradicate pathogens with little development of resistance, but they often inflict nonselective toxicity toward mammalian cells. The prevailing approach to optimize the selectivity of cationic peptides has been to modify their composition. Instead, we invent a new generation of broad-spectrum antibacterial nanoconstructs with negligible mammalian cell toxicity through a competitive displacement of counter polyanions from the complementary polycations. The nanoconstruct, which has a highly cationic Au nanoparticles (NPs) core shielded by polymeric counterions, is inert in nonbacterial environments. When exposed to negatively charged bacterial envelopes, this construct sheds its polyanions, triggering a cationic Au NP/bacterial membrane interaction that rapidly kills Gram-positive and Gram-negative bacteria. The anionic charge and hydrophilicity of the polyanion provides charge neutralization for the peptide-decorated Au NP core, but it is also bacteria-displaceable. These results provide a foundation for the development of other cationic particles and polymeric counterion combinations with potent antimicrobial activity without toxicity.
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Affiliation(s)
- Dicky Pranantyo
- Centre of Antimicrobial Bioengineering School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
- Department of Chemical & Biomolecular Engineering, National University of Singapore 4 Engineering Drive 4, Kent Ridge 117585, Singapore
| | - Cheerlavancha Raju
- Centre of Antimicrobial Bioengineering School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
| | - Zhangyong Si
- Centre of Antimicrobial Bioengineering School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
| | - Xiaofei Xu
- Centre of Antimicrobial Bioengineering School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
| | - Kevin Pethe
- Lee Kong Chian School of Medicine Nanyang Technological University, 59 Nanyang Drive, Singapore 636921, Singapore
| | - En-Tang Kang
- Department of Chemical & Biomolecular Engineering, National University of Singapore 4 Engineering Drive 4, Kent Ridge 117585, Singapore
| | - Mary B Chan-Park
- Centre of Antimicrobial Bioengineering School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
- Lee Kong Chian School of Medicine Nanyang Technological University, 59 Nanyang Drive, Singapore 636921, Singapore
- School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
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21
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Si Z, Hou Z, Vikhe YS, Thappeta KRV, Marimuthu K, De PP, Ng OT, Li P, Zhu Y, Pethe K, Chan-Park MB. Antimicrobial Effect of a Novel Chitosan Derivative and Its Synergistic Effect with Antibiotics. ACS Appl Mater Interfaces 2021; 13:3237-3245. [PMID: 33405504 DOI: 10.1021/acsami.0c20881] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Cationic polymers are promising antibacterial agents because bacteria have a low propensity to develop resistance against them, but they usually have low biocompatibility because of their hydrophobic moieties. Herein, we report a new biodegradable and biocompatible chitosan-derived cationic antibacterial polymer, 2,6-diamino chitosan (2,6-DAC). 2,6-DAC shows excellent broad-spectrum antimicrobial activity with minimum inhibitory concentrations (MICs) of 8-32 μg/mL against clinically relevant and multidrug-resistant (MDR) bacteria including Listeria monocytogenes, Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Acinetobacter baumannii. Furthermore, 2,6-DAC shows an excellent synergistic effect with various clinically relevant antibiotics proved by decreasing the MICs of the antibiotics against MDR A. baumannii and methicillin-resistant Staphylococcus aureus to <1 μg/mL. In vivo biocompatibility of 2,6-DAC is proved by a dosage of 100 mg/kg compound via oral administration and 25 mg/kg compound via intraperitoneal injection to mice; 2,6-DAC does not cause any weight loss and any significant change in liver and kidney biomarkers or the important blood electrolytes. The combinations of 2,6-DAC together with novobiocin and rifampicin show >2.4 log10 reduction of A. baumannii in murine intraperitoneal and lung infection models. The novel chitosan derivative, 2,6-DAC, can be utilized as a biocompatible broad-spectrum cationic antimicrobial agent alone or in synergistic combination with various antibiotics.
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Affiliation(s)
- Zhangyong Si
- School of Chemical and Biomedical Engineering, Nanyang Technological University (NTU), 62 Nanyang Drive, Singapore 637459, Singapore
- Centre for Antimicrobial Bioengineering, NTU, Singapore 637459, Singapore
| | - Zheng Hou
- School of Chemical and Biomedical Engineering, Nanyang Technological University (NTU), 62 Nanyang Drive, Singapore 637459, Singapore
- Centre for Antimicrobial Bioengineering, NTU, Singapore 637459, Singapore
| | - Yogesh Shankar Vikhe
- School of Chemical and Biomedical Engineering, Nanyang Technological University (NTU), 62 Nanyang Drive, Singapore 637459, Singapore
- Centre for Antimicrobial Bioengineering, NTU, Singapore 637459, Singapore
| | - Kishore Reddy Venkata Thappeta
- School of Chemical and Biomedical Engineering, Nanyang Technological University (NTU), 62 Nanyang Drive, Singapore 637459, Singapore
- Centre for Antimicrobial Bioengineering, NTU, Singapore 637459, Singapore
- Singapore Center for Environmental and Life Sciences (SCELSE), NTU, Singapore 637551, Singapore
| | - Kalisvar Marimuthu
- Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore 308442, Singapore
- National Centre for Infectious Diseases, Singapore 637459, Singapore
| | - Partha Pratim De
- Department of Laboratory Medicine, Tan Tock Seng Hospital, Singapore 308433, Singapore
| | - Oon Tek Ng
- Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore 308442, Singapore
- National Centre for Infectious Diseases, Singapore 637459, Singapore
- Lee Kong Chian School of Medicine, NTU, Singapore 636921, Singapore
| | - Peng Li
- Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an 710072, China
| | - Yabin Zhu
- Medical School of Ningbo University, Ningbo 315211, Zhejiang, China
| | - Kevin Pethe
- Lee Kong Chian School of Medicine, NTU, Singapore 636921, Singapore
- School of Biological Sciences, NTU, Singapore 637551, Singapore
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University (NTU), 62 Nanyang Drive, Singapore 637459, Singapore
- Centre for Antimicrobial Bioengineering, NTU, Singapore 637459, Singapore
- Lee Kong Chian School of Medicine, NTU, Singapore 636921, Singapore
- School of Physical and Mathematical Sciences, NTU, Singapore 637371, Singapore
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22
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Hou S, Mahadevegowda SH, Lu D, Zhang K, Chan-Park MB, Duan H. Metabolic Labeling Mediated Targeting and Thermal Killing of Gram-Positive Bacteria by Self-Reporting Janus Magnetic Nanoparticles. Small 2021; 17:e2006357. [PMID: 33325629 DOI: 10.1002/smll.202006357] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/18/2020] [Indexed: 06/12/2023]
Abstract
Nanoparticles have been widely used in detection and killing of bacteria; however, targeting bacteria is still challenging. Delicate design of nanoparticles is required for simultaneous targeting, detection, and therapeutic functions. Here the use of Au/MnFe2 O4 (Au/MFO) Janus nanoparticles to target Gram-positive bacteria via metabolic labeling is reported and realize integrated self-reporting and thermal killing of bacteria. In these nanoparticles, the Au component is functionalized with tetrazine to target trans-cyclooctene group anchored on bacterial cell wall by metabolic incorporation of d-amino acids, and the MFO part exhibits peroxidase activity, enabling self-reporting of bacteria before treatment. The spatial separation of targeting and reporting functions avoids the deterioration of catalytic activity after surface modification. Also important is that MFO facilitates magnetic separation and magnetic heating, leading to easy enrichment and magnetic thermal therapy of labeled bacteria. This method demonstrates that metabolic labeling with d-amino acids is a promising strategy to specifically target and kill Gram-positive bacteria.
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Affiliation(s)
- Shuai Hou
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Surendra H Mahadevegowda
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Derong Lu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Kaixi Zhang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Hongwei Duan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
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23
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Pranantyo D, Kang ET, Chan-Park MB. Smart nanomicelles with bacterial infection-responsive disassembly for selective antimicrobial applications. Biomater Sci 2021; 9:1627-1638. [DOI: 10.1039/d0bm01382j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Electrostatic nanomicelles remain stable and biocompatible under physiological conditions, but readily burst and spill out cationic antimicrobial peptide to kill bacteria at infection sites.
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Affiliation(s)
- Dicky Pranantyo
- Centre of Antimicrobial Bioengineering
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Department of Chemical and Biomolecular Engineering
| | - En-Tang Kang
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore 117585
| | - Mary B. Chan-Park
- Centre of Antimicrobial Bioengineering
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Lee Kong Chian School of Medicine
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24
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Hou Z, Wu Y, Xu C, Reghu S, Shang Z, Chen J, Pranantyo D, Marimuth K, De PP, Ng OT, Pethe K, Kang ET, Li P, Chan-Park MB. Precisely Structured Nitric-Oxide-Releasing Copolymer Brush Defeats Broad-Spectrum Catheter-Associated Biofilm Infections In Vivo. ACS Cent Sci 2020; 6:2031-2045. [PMID: 33274280 PMCID: PMC7706084 DOI: 10.1021/acscentsci.0c00755] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Indexed: 06/12/2023]
Abstract
Gram-negative bacteria cannot be easily eradicated by antibiotics and are a major source of recalcitrant infections of indwelling medical devices. Among various device-associated infections, intravascular catheter infection is a leading cause of mortality. Prior approaches to surface modification, such as antibiotics impregnation, hydrophilization, unstructured NO-releasing, etc., have failed to achieve adequate infection-resistant coatings. We report a precision-structured diblock copolymer brush (H(N)-b-S) composed of a surface antifouling block of poly(sulfobetaine methacrylate) (S) and a subsurface bactericidal block (H(N)) of nitric-oxide-emitting functionalized poly(hydroxyethyl methacrylate) (H) covalently grafted from the inner and outer surfaces of a polyurethane catheter. The block copolymer architecture of the coating is important for achieving good broad-spectrum anti-biofilm activity with good biocompatibility and low fouling. The coating procedure is scalable to clinically useful catheter lengths. Only the block copolymer brush coating ((H(N)-b-S)) shows unprecedented, above 99.99%, in vitro biofilm inhibition of Gram-positive and Gram-negative bacteria, 100-fold better than previous coatings. It has negligible toxicity toward mammalian cells and excellent blood compatibility. In a murine subcutaneous infection model, it achieves >99.99% biofilm reduction of Gram-positive and Gram-negative bacteria compared with <90% for silver catheter, while in a porcine central venous catheter infection model, it achieves >99.99% reduction of MRSA with 5-day implantation. This precision coating is readily applicable for long-term biofilm-resistant and blood-compatible copolymer coatings covalently grafted from a wide range of medical devices.
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Affiliation(s)
- Zheng Hou
- School
of Chemical and Biomedical Engineering, Nanyang Technological University (NTU), 62 Nanyang Drive, Singapore 637459
- Centre
for Antimicrobial Bioengineering, NTU, 62 Nanyang Drive, Singapore 637459
| | - Yang Wu
- School
of Chemical and Biomedical Engineering, Nanyang Technological University (NTU), 62 Nanyang Drive, Singapore 637459
- Centre
for Antimicrobial Bioengineering, NTU, 62 Nanyang Drive, Singapore 637459
| | - Chen Xu
- School
of Chemical and Biomedical Engineering, Nanyang Technological University (NTU), 62 Nanyang Drive, Singapore 637459
- Centre
for Antimicrobial Bioengineering, NTU, 62 Nanyang Drive, Singapore 637459
| | - Sheethal Reghu
- School
of Chemical and Biomedical Engineering, Nanyang Technological University (NTU), 62 Nanyang Drive, Singapore 637459
- Centre
for Antimicrobial Bioengineering, NTU, 62 Nanyang Drive, Singapore 637459
| | - Zifang Shang
- Frontiers
Science Center for Flexible Electronics (FSCFE), Xi’an Institute
of Flexible Electronics (IFE) & Xi’an Institute of Biomedical
Materials and Engineering (IBME), Northwestern
Polytechnical University (NPU), 1 Dongxiang Road Changan District, Xi’an 710072, China
| | - Jingjie Chen
- Frontiers
Science Center for Flexible Electronics (FSCFE), Xi’an Institute
of Flexible Electronics (IFE) & Xi’an Institute of Biomedical
Materials and Engineering (IBME), Northwestern
Polytechnical University (NPU), 1 Dongxiang Road Changan District, Xi’an 710072, China
| | - Dicky Pranantyo
- Department
of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Kent Ridge, Singapore 117585
| | - Kalisvar Marimuth
- Tan
Tock Seng Hospital, 11
Jalan Tan Tock Seng, Singapore 308433
- Yong
Loo Lin School of Medicine, National University
of Singapore, 1E Kent Ridge Road, Singapore 119228
- National
Centre for Infectious Diseases, 16 Jalan Tan Tock Seng, Singapore 308442
| | - Partha Pratim De
- Tan
Tock Seng Hospital, 11
Jalan Tan Tock Seng, Singapore 308433
| | - Oon Tek Ng
- Lee
Kong Chian School of Medicine, Nanyang Technological
University, 59 Nanyang Drive, Singapore 636921
- Tan
Tock Seng Hospital, 11
Jalan Tan Tock Seng, Singapore 308433
- National
Centre for Infectious Diseases, 16 Jalan Tan Tock Seng, Singapore 308442
| | - Kevin Pethe
- Lee
Kong Chian School of Medicine, Nanyang Technological
University, 59 Nanyang Drive, Singapore 636921
| | - En-Tang Kang
- Department
of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Kent Ridge, Singapore 117585
| | - Peng Li
- Frontiers
Science Center for Flexible Electronics (FSCFE), Xi’an Institute
of Flexible Electronics (IFE) & Xi’an Institute of Biomedical
Materials and Engineering (IBME), Northwestern
Polytechnical University (NPU), 1 Dongxiang Road Changan District, Xi’an 710072, China
| | - Mary B. Chan-Park
- School
of Chemical and Biomedical Engineering, Nanyang Technological University (NTU), 62 Nanyang Drive, Singapore 637459
- Centre
for Antimicrobial Bioengineering, NTU, 62 Nanyang Drive, Singapore 637459
- School
of Physical and Mathematical Sciences, 21 Nanyang Link, Singapore 637371
- Lee
Kong Chian School of Medicine, Nanyang Technological
University, 59 Nanyang Drive, Singapore 636921
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25
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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] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 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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26
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Fritz PA, Zhang P, Bruschinski T, Sahin S, de Smet LC, Chan-Park MB, Boom RM, Schroën CG. Steering protein and salt ad- and desorption by an electrical switch applied to polymer-coated electrodes. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117195] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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27
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Zhang H, Chan-Park MB, Wang M. Functional Polymers and Polymer-Dye Composites for Food Sensing. Macromol Rapid Commun 2020; 41:e2000279. [PMID: 32840324 DOI: 10.1002/marc.202000279] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 07/29/2020] [Indexed: 12/19/2022]
Abstract
The sensitive, safe, and portable detection of food spoilage is becoming unprecedentedly important because it is closely related to the public health and economic development, particularly given the globalization of food supply chain. However, the existing approaches for food monitoring are still limited to meet these requirements. To address this challenge, much research has been done to develop an ideal food sensor that can indicate food quality in real-time in a sensitive and reliable way. So far, many sensors such as time-temperature indicators, smart trademarks, colorimetric tags, electronic noses, and electronic tongues, have been developed and even commercialized. In this feature article, the recent progress of food sensors based on functional polymers, including the molecular design of polymer structures, sensing mechanisms, and relevant processing techniques to fabricate a variety of food sensor devices is reviewed.
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Affiliation(s)
- Hang Zhang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Mingfeng Wang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
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28
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Li J, Zhong W, Zhang K, Wang D, Hu J, Chan-Park MB. Biguanide-Derived Polymeric Nanoparticles Kill MRSA Biofilm and Suppress Infection In Vivo. ACS Appl Mater Interfaces 2020; 12:21231-21241. [PMID: 31934739 DOI: 10.1021/acsami.9b17747] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a significant cause of drug-resistant infections. Its propensity to develop biofilms makes it especially resistant to conventional antibiotics. We present a novel nanoparticle (NP) system made from biocompatible F-127 surfactant, tannic acid (TA), and biguanide-based polymetformin (PMET) (termed FTP NPs), which can kill MRSA biofilm bacteria effectively in vitro and in vivo and which has excellent biocompatibility. FTP NPs exhibit biofilm bactericidal activity-ability to kill bacteria both inside and outside biofilm-significantly better than many antimicrobial peptides or polymers. At low concentrations (8-32 μg/mL) in vitro, FTP NPs outperformed PMET with ∼100-fold (∼2 log10) greater reduction of MRSA USA300 biofilm bacterial cell counts, which we attribute to the antifouling property of the hydrophilic poly(ethylene glycol) contributed by F-127. Further, in an in vivo murine excisional wound model, FTP NPs achieved 1.8 log10 reduction of biofilm-associated MRSA USA300 bacteria, which significantly outperformed vancomycin (0.8 log10 reduction). Moreover, in vitro cytotoxicity tests showed that FTP NPs have less toxicity than PMET toward mammalian cells, and in vivo intravenous injection of FTP NPs at 10 mg/kg showed no acute toxicity to mice with negligible body weight loss and no significant perturbation of blood biomarkers. These biguanide-based FTP NPs are a promising approach to therapy of MRSA infections.
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Affiliation(s)
- Jianghua Li
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459 Singapore
| | - Wenbin Zhong
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459 Singapore
| | - Kaixi Zhang
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459 Singapore
| | - Dongwei Wang
- Institute of Drug Discovery Technology, Ningbo University, Ningbo 315000, China
| | - Jingbo Hu
- Institute of Drug Discovery Technology, Ningbo University, Ningbo 315000, China
| | - Mary B Chan-Park
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459 Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, 636921 Singapore
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29
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Thappeta KRV, Vikhe YS, Yong AMH, Chan-Park MB, Kline KA. Combined Efficacy of an Antimicrobial Cationic Peptide Polymer with Conventional Antibiotics to Combat Multidrug-Resistant Pathogens. ACS Infect Dis 2020; 6:1228-1237. [PMID: 32138506 DOI: 10.1021/acsinfecdis.0c00016] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Antibiotic-resistant infections are predicted to kill 10 million people worldwide per year by 2050 and to cost the global economy 100 trillion USD. Novel approaches and alternatives to conventional antibiotics are urgently required to combat antimicrobial resistance. We have synthesized a chitosan-based oligolysine antimicrobial peptide, CSM5-K5 (where CSM denotes chitosan monomer repeat units and K denotes lysine amino acid repeat units), that targets multidrug-resistant (MDR) bacterial species. Here, we show that CSM5-K5 exhibits rapid bactericidal activity against methicillin-resistant Staphylococcus aureus (MRSA), MDR Escherichia coli, and vancomycin-resistant Enterococcus faecalis (VRE). Combinatorial therapy of CSM5-K5 with antibiotics to which each organism is otherwise resistant restores sensitivity to the conventional antibiotic. CSM5-K5 alone significantly reduced preformed bacterial biofilm by 2-4 orders of magnitude and, in combination with conventional antibiotics, reduced preformed biofilm by more than 2-3 orders of magnitude at subinhibitory concentrations. Moreover, using a mouse excisional wound infection model, CSM5-K5 treatment reduced bacterial burdens by 1-3 orders of magnitude and acted synergistically with oxacillin, vancomycin, and streptomycin to clear MRSA, VRE, and MDR E. coli, respectively. Importantly, little to no resistance against CSM5-K5 arose for any of the three MDR bacteria during 15 days of serial passage. Furthermore, low level resistance to CSM5-K5 that did arise for MRSA conferred increased susceptibility (collateral sensitivity) to the β-lactam antibiotic oxacillin. This work demonstrates the feasibility and benefits of using this synthetic cationic peptide as an alternative to, or in combination with, traditional antibiotics to treat infections caused by MDR bacteria.
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Affiliation(s)
- Kishore R. V. Thappeta
- Singapore Centre for Environmental Life Science Engineering, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551
| | - Yogesh S. Vikhe
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459
| | - Adeline M. H. Yong
- Singapore Centre for Environmental Life Science Engineering, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551
| | - Mary B. Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459
| | - Kimberly A. Kline
- Singapore Centre for Environmental Life Science Engineering, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551
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30
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Lew TTS, Koman VB, Silmore KS, Seo JS, Gordiichuk P, Kwak SY, Park M, Ang MCY, Khong DT, Lee MA, Chan-Park MB, Chua NH, Strano MS. Real-time detection of wound-induced H 2O 2 signalling waves in plants with optical nanosensors. Nat Plants 2020; 6:404-415. [PMID: 32296141 DOI: 10.1038/s41477-020-0632-4] [Citation(s) in RCA: 92] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 03/10/2020] [Indexed: 05/21/2023]
Abstract
Decoding wound signalling in plants is critical for understanding various aspects of plant sciences, from pest resistance to secondary metabolite and phytohormone biosynthesis. The plant defence responses are known to primarily involve NADPH-oxidase-mediated H2O2 and Ca2+ signalling pathways, which propagate across long distances through the plant vasculature and tissues. Using non-destructive optical nanosensors, we find that the H2O2 concentration profile post-wounding follows a logistic waveform for six plant species: lettuce (Lactuca sativa), arugula (Eruca sativa), spinach (Spinacia oleracea), strawberry blite (Blitum capitatum), sorrel (Rumex acetosa) and Arabidopsis thaliana, ranked in order of wave speed from 0.44 to 3.10 cm min-1. The H2O2 wave tracks the concomitant surface potential wave measured electrochemically. We show that the plant RbohD glutamate-receptor-like channels (GLR3.3 and GLR3.6) are all critical to the propagation of the wound-induced H2O2 wave. Our findings highlight the utility of a new type of nanosensor probe that is species-independent and capable of real-time, spatial and temporal biochemical measurements in plants.
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Affiliation(s)
- Tedrick Thomas Salim Lew
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-06/07/08 Research Wing, Singapore, Singapore
| | - Volodymyr B Koman
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Kevin S Silmore
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Jun Sung Seo
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-06/07/08 Research Wing, Singapore, Singapore
- Temasek Life Sciences Laboratory Limited, 1 Research Link National University of Singapore, Singapore, Singapore
| | - Pavlo Gordiichuk
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Seon-Yeong Kwak
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul, Republic of Korea
| | - Minkyung Park
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-06/07/08 Research Wing, Singapore, Singapore
| | - Mervin Chun-Yi Ang
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-06/07/08 Research Wing, Singapore, Singapore
| | - Duc Thinh Khong
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-06/07/08 Research Wing, Singapore, Singapore
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
| | - Michael A Lee
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Mary B Chan-Park
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-06/07/08 Research Wing, Singapore, Singapore
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
| | - Nam-Hai Chua
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-06/07/08 Research Wing, Singapore, Singapore
- Temasek Life Sciences Laboratory Limited, 1 Research Link National University of Singapore, Singapore, Singapore
| | - Michael S Strano
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
- Disruptive & Sustainable Technologies for Agricultural Precision IRG, Singapore-MIT Alliance for Research and Technology, 1 CREATE Way, #03-06/07/08 Research Wing, Singapore, Singapore.
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31
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He JX, Le Mai Hoang K, Kho SH, Guo Z, Zhong W, Venkata Thappeta KR, Zamudio-Vázquez R, Hoo SN, Xiong Q, Duan H, Yang L, Chan-Park MB, Liu XW. Synthetic biohybrid peptidoglycan oligomers enable pan-bacteria-specific labeling and imaging: in vitro and in vivo. Chem Sci 2020; 11:3171-3179. [PMID: 34122822 PMCID: PMC8157403 DOI: 10.1039/c9sc06345e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Peptidoglycan is the core component of the bacterial cell wall, which makes it an attractive target for the development of bacterial targeting agents. Intercepting its enzymatic assembly with synthetic substrates allows for labeling and engineering of live bacterial cells. Over the past two decades, small-molecule-based labeling agents, such as antibiotics, d-amino acids or monosaccharides have been developed for probing biological processes in bacteria. Herein, peptidoglycan oligomers, substrates for transglycosylation, are prepared for the first time using a top-down approach, which starts from chitosan as a cheap feedstock. A high efficiency of labeling has been observed in all bacterial strains tested using micromolar substrates. In contrast, uptake into mammalian cells was barely observable. Additional mechanistic studies support a hypothesis of bacteria-specific metabolic labeling rather than non-specific binding to the bacterial surface. Eventually, its practicality in bacterial targeting capability is demonstrated in resistant strain detection and in vivo infection models.
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Affiliation(s)
- Jing-Xi He
- School of Physical and Mathematical Sciences, Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore .,School of Chemical and Biomedical Engineering, Nanyang Technological University 62 Nanyang Drive Singapore 637459 Singapore
| | - Kim Le Mai Hoang
- School of Physical and Mathematical Sciences, Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Shu Hui Kho
- School of Physical and Mathematical Sciences, Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore .,NTU Institute for Health Technologies, Nanyang Technological University Singapore
| | - Zhong Guo
- School of Physical and Mathematical Sciences, Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Wenbin Zhong
- School of Chemical and Biomedical Engineering, Nanyang Technological University 62 Nanyang Drive Singapore 637459 Singapore
| | - Kishore Reddy Venkata Thappeta
- School of Chemical and Biomedical Engineering, Nanyang Technological University 62 Nanyang Drive Singapore 637459 Singapore
| | - Rubí Zamudio-Vázquez
- School of Chemical and Biomedical Engineering, Nanyang Technological University 62 Nanyang Drive Singapore 637459 Singapore
| | - Sin Ni Hoo
- School of Physical and Mathematical Sciences, Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Qirong Xiong
- School of Chemical and Biomedical Engineering, Nanyang Technological University 62 Nanyang Drive Singapore 637459 Singapore
| | - Hongwei Duan
- School of Chemical and Biomedical Engineering, Nanyang Technological University 62 Nanyang Drive Singapore 637459 Singapore
| | - Liang Yang
- School of Medicine, Southern University of Science and Technology Shenzhen 518055 China
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University 62 Nanyang Drive Singapore 637459 Singapore
| | - Xue-Wei Liu
- School of Physical and Mathematical Sciences, Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
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32
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Si Z, Lim HW, Tay MYF, Du Y, Ruan L, Qiu H, Zamudio-Vazquez R, Reghu S, Chen Y, Tiong WS, Marimuthu K, De PP, Ng OT, Zhu Y, Gan YH, Chi YR, Duan H, Bazan GC, Greenberg EP, Chan-Park MB, Pethe K. A Glycosylated Cationic Block Poly(β-peptide) Reverses Intrinsic Antibiotic Resistance in All ESKAPE Gram-Negative Bacteria. Angew Chem Int Ed Engl 2020; 59:6819-6826. [PMID: 32011781 DOI: 10.1002/anie.201914304] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Revised: 01/07/2020] [Indexed: 02/02/2023]
Abstract
Carbapenem-resistant Gram-negative bacteria (GNB) are heading the list of pathogens for which antibiotics are the most critically needed. Many antibiotics are either unable to penetrate the outer-membrane or are excluded by efflux mechanisms. Here, we report a cationic block β-peptide (PAS8-b-PDM12) that reverses intrinsic antibiotic resistance in GNB by two distinct mechanisms of action. PAS8-b-PDM12 does not only compromise the integrity of the bacterial outer-membrane, it also deactivates efflux pump systems by dissipating the transmembrane electrochemical potential. As a result, PAS8-b-PDM12 sensitizes carbapenem- and colistin-resistant GNB to multiple antibiotics in vitro and in vivo. The β-peptide allows the perfect alternation of cationic versus hydrophobic side chains, representing a significant improvement over previous antimicrobial α-peptides sensitizing agents. Together, our results indicate that it is technically possible for a single adjuvant to reverse innate antibiotic resistance in all pathogenic GNB of the ESKAPE group, including those resistant to last resort antibiotics.
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Affiliation(s)
- Zhangyong Si
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
| | - Hui Wen Lim
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 636921, Singapore
| | - Moon Y F Tay
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
| | - Yu Du
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
| | - Lin Ruan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
| | - Haofeng Qiu
- Medical School of Ningbo University, Ningbo University, Ningbo, 315211, China
| | - Rubí Zamudio-Vazquez
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
| | - Sheethal Reghu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
| | - Yahua Chen
- Department of Biochemistry, National University of Singapore, Singapore, 117596, Singapore
| | - Wen Shuo Tiong
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 636921, Singapore
| | - Kalisvar Marimuthu
- Tan Tock Seng Hospital, Singapore, 308433, Singapore.,Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 119228, Singapore.,National Centre for Infectious Diseases, Singapore
| | | | - Oon Tek Ng
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 636921, Singapore.,Tan Tock Seng Hospital, Singapore, 308433, Singapore.,National Centre for Infectious Diseases, Singapore
| | - Yabin Zhu
- Medical School of Ningbo University, Ningbo University, Ningbo, 315211, China
| | - Yunn-Hwen Gan
- Department of Biochemistry, National University of Singapore, Singapore, 117596, Singapore
| | - Yonggui Robin Chi
- Division of Chemistry & Biological Chemistry, Nanyang Technological University, Singapore, 637371, Singapore
| | - Hongwei Duan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore
| | - Guillermo C Bazan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore.,Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, 93106-9510, USA
| | - E Peter Greenberg
- School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, 637459, Singapore.,Department of Microbiology, University of Washington, Seattle, WA, 98195, USA
| | - 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
| | - Kevin Pethe
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, 636921, Singapore.,School of Biological Sciences, Nanyang Technological University, Singapore, 637551, Singapore
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33
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Chilambi GS, Hinks J, Matysik A, Zhu X, Choo PY, Liu X, Chan-Park MB, Bazan GC, Kline KA, Rice SA. Enterococcus faecalis Adapts to Antimicrobial Conjugated Oligoelectrolytes by Lipid Rearrangement and Differential Expression of Membrane Stress Response Genes. Front Microbiol 2020; 11:155. [PMID: 32117172 PMCID: PMC7033496 DOI: 10.3389/fmicb.2020.00155] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 01/22/2020] [Indexed: 11/17/2022] Open
Abstract
Conjugated oligoelectrolytes (COEs) are emerging antimicrobials with broad spectrum activity against Gram positive and Gram negative bacteria as well as fungi. Our previous in vitro evolution studies using Enterococcus faecalis grown in the presence of two related COEs (COE1-3C and COE1-3Py) led to the emergence of mutants (changes in liaF and liaR) with a moderate 4- to16-fold increased resistance to COEs. The contribution of liaF and liaR mutations to COE resistance was confirmed by complementation of the mutants, which restored sensitivity to COEs. To better understand the cellular target of COEs, and the mechanism of resistance to COEs, transcriptional changes associated with resistance in the evolved mutants were investigated in this study. The differentially transcribed genes encoded membrane transporters, in addition to proteins associated with cell envelope synthesis and stress responses. Genes encoding membrane transport proteins from the ATP binding cassette superfamily were the most significantly induced or repressed in COE tolerant mutants compared to the wild type when exposed to COEs. Additionally, differences in the membrane localization of a lipophilic dye in E. faecalis exposed to COEs suggested that resistance was associated with lipid rearrangement in the cell membrane. The membrane adaptation to COEs in EFC3C and EFC3Py resulted in an improved tolerance to bile salt and sodium chloride stress. Overall, this study showed that bacterial cell membranes are the primary target of COEs and that E. faecalis adapts to membrane interacting COE molecules by both lipid rearrangement and changes in membrane transporter activity. The level of resistance to COEs suggests that E. faecalis does not have a specific response pathway to elicit resistance against these molecules and this is supported by the rather broad and diverse suite of genes that are induced upon COE exposure as well as cross-resistance to membrane perturbing stressors.
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Affiliation(s)
- Gayatri Shankar Chilambi
- Interdisciplinary Graduate School, Nanyang Technological University, Singapore, Singapore
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
| | - Jamie Hinks
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
| | - Artur Matysik
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
| | - Xinyi Zhu
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
| | - Pei Yi Choo
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
| | - Xianghui Liu
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
| | - Mary B. Chan-Park
- School of Chemical and Biomedical Engineering, College of Engineering, Nanyang Technological University, Singapore, Singapore
| | - Guillermo C. Bazan
- School of Chemical and Biomedical Engineering, College of Engineering, Nanyang Technological University, Singapore, Singapore
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry and Materials, University of California, Santa Barbara, Santa Barbara, CA, United States
| | - Kimberly A. Kline
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Scott A. Rice
- Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, Singapore
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
- The ithree Institute, University of Technology Sydney, Sydney, NSW, Australia
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34
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Park M, Salem DP, Parviz D, Gong X, Silmore KS, Lew TTS, Khong DT, Ang MCY, Kwak SY, Chan-Park MB, Strano MS. Measuring the Accessible Surface Area within the Nanoparticle Corona Using Molecular Probe Adsorption. Nano Lett 2019; 19:7712-7724. [PMID: 31565943 PMCID: PMC7206615 DOI: 10.1021/acs.nanolett.9b02647] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The corona phase-the adsorbed layer of polymer, surfactant, or stabilizer molecules around a nanoparticle-is typically utilized to disperse nanoparticles into a solution or solid phase. However, this phase also controls molecular access to the nanoparticle surface, a property important for catalytic activity and sensor applications. Unfortunately, few methods can directly probe the structure of this corona phase, which is subcategorized as either a hard, immobile corona or a soft, transient corona in exchange with components in the bulk solution. In this work, we introduce a molecular probe adsorption (MPA) method for measuring the accessible nanoparticle surface area using a titration of a quenchable fluorescent molecule. For example, riboflavin is utilized to measure the surface area of gold nanoparticle standards, as well as corona phases on dispersed single-walled carbon nanotubes and graphene sheets. A material balance on the titration yields certain surface coverage parameters, including the ratio of the surface area to dissociation constant of the fluorophore, q/KD, as well as KD itself. Uncertainty, precision, and the correlation of these parameters across different experimental systems, preparations, and modalities are all discussed. Using MPA across a series of corona phases, we find that the Gibbs free energy of probe binding scales inversely with the cube root of surface area, q. In this way, MPA is the only technique to date capable of discerning critical structure-property relationships for such nanoparticle surface phases. Hence, MPA is a rapid quantitative technique that should prove useful for elucidating corona structure for nanoparticles across different systems.
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Affiliation(s)
- Minkyung Park
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Daniel P Salem
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Dorsa Parviz
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Xun Gong
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Kevin S Silmore
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Tedrick Thomas Salim Lew
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Duc Thinh Khong
- Disruptive & Sustainable Technologies for Agricultural Precision IRG , Singapore-MIT Alliance for Research and Technology , 1 Create Way , Singapore 138602 , Singapore
- School of Chemical and Biomedical Engineering , Nanyang Technological University , 62, Nanyang Drive , Singapore 637459 , Singapore
| | - Mervin Chun-Yi Ang
- Disruptive & Sustainable Technologies for Agricultural Precision IRG , Singapore-MIT Alliance for Research and Technology , 1 Create Way , Singapore 138602 , Singapore
| | - Seon-Yeong Kwak
- Department of Biosystems and Biomaterials Science and Engineering , Seoul National University , Seoul 08826 , Republic of Korea
| | - Mary B Chan-Park
- Disruptive & Sustainable Technologies for Agricultural Precision IRG , Singapore-MIT Alliance for Research and Technology , 1 Create Way , Singapore 138602 , Singapore
- School of Chemical and Biomedical Engineering , Nanyang Technological University , 62, Nanyang Drive , Singapore 637459 , Singapore
| | - Michael S Strano
- Department of Chemical Engineering , Massachusetts Institute of Technology , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
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35
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Zhang K, Du Y, Si Z, Liu Y, Turvey ME, Raju C, Keogh D, Ruan L, Jothy SL, Reghu S, Marimuthu K, De PP, Ng OT, Mediavilla JR, Kreiswirth BN, Chi YR, Ren J, Tam KC, Liu XW, Duan H, Zhu Y, Mu Y, Hammond PT, Bazan GC, Pethe K, Chan-Park MB. Enantiomeric glycosylated cationic block co-beta-peptides eradicate Staphylococcus aureus biofilms and antibiotic-tolerant persisters. Nat Commun 2019; 10:4792. [PMID: 31636263 PMCID: PMC6803644 DOI: 10.1038/s41467-019-12702-8] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 09/19/2019] [Indexed: 12/11/2022] Open
Abstract
The treatment of bacterial infections is hindered by the presence of biofilms and metabolically inactive persisters. Here, we report the synthesis of an enantiomeric block co-beta-peptide, poly(amido-D-glucose)-block-poly(beta-L-lysine), with high yield and purity by one-shot one-pot anionic-ring opening (co)polymerization. The co-beta-peptide is bactericidal against methicillin-resistant Staphylococcus aureus (MRSA), including replicating, biofilm and persister bacterial cells, and also disperses biofilm biomass. It is active towards community-acquired and hospital-associated MRSA strains which are resistant to multiple drugs including vancomycin and daptomycin. Its antibacterial activity is superior to that of vancomycin in MRSA mouse and human ex vivo skin infection models, with no acute in vivo toxicity in repeated dosing in mice at above therapeutic levels. The copolymer displays bacteria-activated surfactant-like properties, resulting from contact with the bacterial envelope. Our results indicate that this class of non-toxic molecule, effective against different bacterial sub-populations, has promising potential for the treatment of S. aureus infections. The authors report the synthesis of an enantiomeric block co-beta-peptide that kills methicillin-resistant Staphylococcus aureus, including biofilm and persister bacterial cells, and disperses biofilms. The copolymer displays antibacterial activity in human ex vivo and mouse in vivo infection models without toxicity.
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Affiliation(s)
- Kaixi Zhang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.,Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Yu Du
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.,Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.,Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, 350002, Fuzhou, China
| | - Zhangyong Si
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.,Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Yang Liu
- Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.,School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore
| | - Michelle E Turvey
- Infectious Disease Interdisciplinary Research Group, Singapore-MIT Alliance for Research & Technology Centre, 1 Create Way, Singapore, 138602, Singapore
| | - Cheerlavancha Raju
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.,Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Damien Keogh
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.,Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Lin Ruan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.,Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Subramanion L Jothy
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.,Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Sheethal Reghu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.,Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Kalisvar Marimuthu
- Department of Infectious Diseases, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore.,National Centre for Infectious Diseases, 16 Jalan Tan Tock Seng, Singapore, 308442, Singapore
| | - Partha Pratim De
- Department of Laboratory Medicine, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore
| | - Oon Tek Ng
- Department of Infectious Diseases, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore, 308433, Singapore.,National Centre for Infectious Diseases, 16 Jalan Tan Tock Seng, Singapore, 308442, Singapore.,Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, Singapore, 636921, Singapore
| | - José R Mediavilla
- Center for Discovery and Innovation, Hackensack Meridian Health, Nutley, NJ, 07110, USA
| | - Barry N Kreiswirth
- Center for Discovery and Innovation, Hackensack Meridian Health, Nutley, NJ, 07110, USA
| | - Yonggui Robin Chi
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Jinghua Ren
- Cancer Center, Union Hospital, Huazhong University of Science & Technology, Wuhan, 430022, Hubei, China
| | - Kam C Tam
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, Ontario, N2L 3G1, Canada
| | - Xue-Wei Liu
- Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.,Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Hongwei Duan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.,Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Yabin Zhu
- Medical School of Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Yuguang Mu
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore
| | - Paula T Hammond
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.,Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Guillermo C Bazan
- Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106-9510, USA
| | - Kevin Pethe
- Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore. .,School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore. .,Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, Singapore, 636921, Singapore.
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore. .,Centre for Antimicrobial Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore. .,Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, Singapore, 636921, Singapore.
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36
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Pranantyo D, Liu P, Zhong W, Kang ET, Chan-Park MB. Antimicrobial Peptide-Reduced Gold Nanoclusters with Charge-Reversal Moieties for Bacterial Targeting and Imaging. Biomacromolecules 2019; 20:2922-2933. [DOI: 10.1021/acs.biomac.9b00392] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Dicky Pranantyo
- Department of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Kent Ridge, Singapore 117585, Republic of Singapore
| | - Peng Liu
- Department of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Kent Ridge, Singapore 117585, Republic of Singapore
| | - Wenbin Zhong
- Centre of Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Republic of Singapore
| | - En-Tang Kang
- Department of Chemical & Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Kent Ridge, Singapore 117585, Republic of Singapore
| | - Mary B. Chan-Park
- Centre of Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Republic of Singapore
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37
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Liu Y, Li W, Chan-Park MB, Mu Y. The Necessity of d-Thr in the New Antibiotic Teixobactin: A Molecular Dynamics Study. J Chem Inf Model 2019; 59:1575-1583. [PMID: 30855952 DOI: 10.1021/acs.jcim.8b00949] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ever since the discovery of the new antibiotic teixobactin, studies of its structure-activity relationships have never ceased. Here we focus on the chirality of the threonine (Thr) residue, which belongs to the ring motif of teixobactin and plays an important role in the binding with its target, lipid II molecule. We study the structural propensity of the open and closed ring motifs with different chiral Thr residues as well as the teixobactin-lipid II complex with the help of molecular dynamics simulations. Our results suggest that different chiralities lead to different NH orientations of Thr with respect to the ring plane. Only in the closed ring motif with d-Thr is a favored binding cavity achievable with all four NH groups facing the same side of the ring plane. This study develops a deeper understanding of the binding mechanism of teixobactin and lipid II and is expected to be beneficial to new teixobactin-based drug design.
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Affiliation(s)
- Yang Liu
- School of Physics , Shandong University , 27 Shandanan Road , Jinan , Shandong 250100 , China.,School of Biological Sciences , Nanyang Technological University (NTU) , 60 Nanyang Drive , Singapore 637551
| | - Weifeng Li
- School of Physics , Shandong University , 27 Shandanan Road , Jinan , Shandong 250100 , China
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering , Nanyang Technological University (NTU) , 62 Nanyang Drive , Singapore 637459.,Centre for Antimicrobial Bioengineering , Nanyang Technological University (NTU) , 60 Nanyang Drive , Singapore 637551
| | - Yuguang Mu
- School of Biological Sciences , Nanyang Technological University (NTU) , 60 Nanyang Drive , Singapore 637551
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38
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Xu Y, Zhang K, Reghu S, Lin Y, Chan-Park MB, Liu XW. Synthesis of Antibacterial Glycosylated Polycaprolactones Bearing Imidazoliums with Reduced Hemolytic Activity. Biomacromolecules 2019; 20:949-958. [DOI: 10.1021/acs.biomac.8b01577] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yuan Xu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Republic of Singapore
| | - Kaixi Zhang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Republic of Singapore
| | - Sheethal Reghu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Republic of Singapore
| | - Yichao Lin
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Republic of Singapore
| | - Mary B. Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Republic of Singapore
- Centre for Antimicrobial
Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Republic of Singapore
| | - Xue-Wei Liu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Republic of Singapore
- Centre for Antimicrobial
Bioengineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Republic of Singapore
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39
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Liu B, Liu C, De Luca HG, Raman Pillai SK, Anthony DB, Li J, Bismarck A, Shaffer MSP, Chan-Park MB. Synthesis of epoxidized poly(ester carbonate)-b-polyimide-b-poly(ester carbonate): reactive single-walled carbon nanotube dispersants enable synergistic reinforcement around multi-walled nanotube-grafted carbon fibers. Polym Chem 2019. [DOI: 10.1039/c8py01465e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel triblock polymers for nanocomposite applications.
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Affiliation(s)
- Bo Liu
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Singapore
| | - Chengyin Liu
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Singapore
| | | | - Suresh Kumar Raman Pillai
- 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
| | | | - Milo S. P. Shaffer
- Department of Materials
- Imperial College of London
- UK
- Department of Chemistry
- Imperial College of London
| | - Mary B. Chan-Park
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- Singapore 637459
- Singapore
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40
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Mahadevegowda SH, Hou S, Ma J, Keogh D, Zhang J, Mallick A, Liu XW, Duan H, Chan-Park MB. Raman-encoded, multivalent glycan-nanoconjugates for traceable specific binding and killing of bacteria. Biomater Sci 2018; 6:1339-1346. [PMID: 29644358 DOI: 10.1039/c8bm00139a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Glycan recognition plays key roles in cell-cell and host-pathogen interactions, stimulating widespread interest in developing multivalent glycoconjugates with superior binding affinity for biological and medical uses. Here, we explore the use of Raman-encoded silver coated gold nanorods (GNRs) as scaffolds to form multivalent glycoconjugates. The plasmonic scaffolds afford high-loading of glycan density and their optical properties offer the possibilities of monitoring and quantitative analysis of glycan recognition. Using E. coli strains with tailored on/off of the FimH receptors, we have demonstrated that Raman-encoded GNRs not only allow for real-time imaging and spectroscopic detection of specific binding of the glycan-GNR conjugates with bacteria of interest, but also cause rapid eradication of the bacteria due to the efficient photothermal conversion of GNRs in the near-infrared spectral window. We envision that optically active plasmonic glycoconjugates hold great potential for screening multivalent glycan ligands for therapeutic and diagnostic applications.
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Affiliation(s)
- Surendra H Mahadevegowda
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore.
| | - Shuai Hou
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore.
| | - Jielin Ma
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore.
| | - Damien Keogh
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore.
| | - Jianhua Zhang
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore.
| | - Asadulla Mallick
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Xue-Wei Liu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
| | - Hongwei Duan
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore.
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore.
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41
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Zhang P, Fritz PA, Schroën K, Duan H, Boom RM, Chan-Park MB. Zwitterionic Polymer Modified Porous Carbon for High-Performance and Antifouling Capacitive Desalination. ACS Appl Mater Interfaces 2018; 10:33564-33573. [PMID: 30188680 DOI: 10.1021/acsami.8b11708] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Capacitive deionization (CDI) is an emerging technology for effective brackish water desalination to address fresh water scarcity. It is of great interest due to its high energy efficiency, environmental friendliness, and low-cost operation compared with traditional desalination technologies. However, electrode fouling, caused by dissolved organic matter and resulting in reduction of electrode electrosorption capacity and device lifespan, is an impediment to practical application of CDI. Herein, we report a novel salty water desalination electrode with excellent antifouling properties. The antifouling electrode is prepared by coating zwitterionic polymer brushes, i.e., poly(sulfobetaine methacrylate) (SBMA), on porous carbon (PC) via surface-initiated atom transfer radical polymerization. The successful coating of zwitterionic polymer on PC surface is confirmed by transmission electron microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, and other characterizations. Coating with polySBMA did not affect the electrosorption capacity of PC electrodes and imparted antifouling properties (versus fouling by model foulant bovine serum albumin) during long-term salt removal tests (100 desalination/regeneration cycles). This is an important step toward practical application of capacitive deionization technology for brackish water desalination.
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Affiliation(s)
- Penghui Zhang
- School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , Singapore 637459
- Centre for Antimicrobial Bioengineering , Nanyang Technological University , Singapore 637459
- Food Process Engineering Laboratory , Wageningen University , Bornse Weilanden 9 , Wageningen 6708 WG , The Netherlands
| | - Pina Atalanta Fritz
- School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , Singapore 637459
- Centre for Antimicrobial Bioengineering , Nanyang Technological University , Singapore 637459
- Food Process Engineering Laboratory , Wageningen University , Bornse Weilanden 9 , Wageningen 6708 WG , The Netherlands
| | - Karin Schroën
- Food Process Engineering Laboratory , Wageningen University , Bornse Weilanden 9 , Wageningen 6708 WG , The Netherlands
| | - Hongwei Duan
- School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , Singapore 637459
| | - Remko M Boom
- Food Process Engineering Laboratory , Wageningen University , Bornse Weilanden 9 , Wageningen 6708 WG , The Netherlands
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , Singapore 637459
- Centre for Antimicrobial Bioengineering , Nanyang Technological University , Singapore 637459
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42
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Li J, Zhang K, Ruan L, Chin SF, Wickramasinghe N, Liu H, Ravikumar V, Ren J, Duan H, Yang L, Chan-Park MB. Block Copolymer Nanoparticles Remove Biofilms of Drug-Resistant Gram-Positive Bacteria by Nanoscale Bacterial Debridement. Nano Lett 2018; 18:4180-4187. [PMID: 29902011 DOI: 10.1021/acs.nanolett.8b01000] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Biofilms and the rapid evolution of multidrug resistance complicate the treatment of bacterial infections. Antibiofilm agents such as metallic-inorganic nanoparticles or peptides act by exerting antibacterial effects and, hence, do not combat biofilms of antibiotics-resistant strains. In this Letter, we show that the block copolymer DA95B5, dextran- block-poly((3-acrylamidopropyl) trimethylammonium chloride (AMPTMA)- co-butyl methacrylate (BMA)), effectively removes preformed biofilms of various clinically relevant multidrug-resistant Gram-positive bacteria including methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant Enterococci (VRE V583), and Enteroccocus faecalis (OG1RF). DA95B5 self-assembles into core-shell nanoparticles with a nonfouling dextran shell and a cationic core. These nanoparticles diffuse into biofilms and attach to bacteria but do not kill them; instead, they promote the gradual dispersal of biofilm bacteria, probably because the solubility of the bacteria-nanoparticle complex is enhanced by the nanoparticle dextran shell. DA95B5, when applied as a solution to a hydrogel pad dressing, shows excellent in vivo MRSA biofilm removal efficacy of 3.6 log reduction in a murine excisional wound model, which is significantly superior to that for vancomycin. Furthermore, DA95B5 has very low in vitro hemolysis and negligible in vivo acute toxicity. This new strategy for biofilm removal (nanoscale bacterial debridement) is orthogonal to conventional rapidly developing resistance traits in bacteria so that it is as effective toward resistant strains as it is toward sensitive strains and may have widespread applications.
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Affiliation(s)
- Jianghua Li
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , 637459 Singapore
| | - Kaixi Zhang
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , 637459 Singapore
| | - Lin Ruan
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , 637459 Singapore
| | - Seow Fong Chin
- Singapore Centre for Environmental Life Sciences Engineering (SCELSE) , Nanyang Technological University , 60 Nanyang Drive , SBS-01N-27, 637551 Singapore
| | - Nirmani Wickramasinghe
- Singapore Centre for Environmental Life Sciences Engineering (SCELSE) , Nanyang Technological University , 60 Nanyang Drive , SBS-01N-27, 637551 Singapore
| | - Hanbin Liu
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , 637459 Singapore
| | - Vikashini Ravikumar
- Singapore Centre for Environmental Life Sciences Engineering (SCELSE) , Nanyang Technological University , 60 Nanyang Drive , SBS-01N-27, 637551 Singapore
| | - Jinghua Ren
- Cancer Center, Union Hospital , Huazhong University of Science & Technology , Wuhan , 430022 China
| | - Hongwei Duan
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , 637459 Singapore
| | - Liang Yang
- Singapore Centre for Environmental Life Sciences Engineering (SCELSE) , Nanyang Technological University , 60 Nanyang Drive , SBS-01N-27, 637551 Singapore
| | - Mary B Chan-Park
- Centre for Antimicrobial Bioengineering, School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , 637459 Singapore
- Lee Kong Chian School of Medicine , Nanyang Technological University , 59 Nanyang Drive , 636921 Singapore
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43
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Yeo CK, Vikhe YS, Li P, Guo Z, Greenberg P, Duan H, Tan NS, Chan-Park MB. Hydrogel Effects Rapid Biofilm Debridement with ex situ Contact-Kill to Eliminate Multidrug Resistant Bacteria in vivo. ACS Appl Mater Interfaces 2018; 10:20356-20367. [PMID: 29806938 DOI: 10.1021/acsami.8b06262] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Multidrug resistance and the refractory character of bacterial biofilms are among the most difficult challenges in infection treatment. Current antimicrobial strategies typically are much more effective for prevention of biofilm formation than for eradication of established biofilms; these strategies also leave dead bacteria and endotoxin in the infection site, which impairs healing. We report a novel hydrogel that eradicates biofilm bacteria by non-leaching-based debridement followed by ex situ contact-killing (DESCK) away from the infection site. The debridement effect is likely due to the high water swellability and microporosity of the cross-linked network which is made from polyethylene glycol dimethacrylate tethered with a dangling polyethylenimine (PEI) star copolymer. The large pore size of the hydrogel makes the cationic pore walls highly accessible to bacteria. The hydrogel also degrades in the presence of infection cells, releasing star cationic PEI into the infection site to contact-kill bacteria remaining there. DESCK hydrogel effectively kills (>99.9% reduction) biofilms of methicillin-resistant Staphylococcus aureus (MRSA) and carbapenem-resistant Pseudomonas aeruginosa (CR-PA) and Acinetobacter baumannii in a murine excisional wound infection model. Silver-based wound dressings (controls) showed almost no killing of CR-PA and MRSA biofilms. This DESCK hydrogel greatly reduces the bioburden and inflammation and promotes wound healing. It has great potential for diverse infection treatment applications.
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Affiliation(s)
- Chun Kiat Yeo
- NTU Institute for Health Technologies, Interdisciplinary Graduate School , Nanyang Technological University , 637553 , Singapore
- School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , 637459 , Singapore
| | - Yogesh Shankar Vikhe
- School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , 637459 , Singapore
- Centre for Antimicrobial Bioengineering , Nanyang Technological University , 637459 , Singapore
| | - Peng Li
- School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , 637459 , Singapore
| | - Zanru Guo
- School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , 637459 , Singapore
| | - Peter Greenberg
- Department of Microbiology , University of Washington School of Medicine , Seattle , Washington 98195-7735 , United States
| | - Hongwei Duan
- School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , 637459 , Singapore
- Centre for Antimicrobial Bioengineering , Nanyang Technological University , 637459 , Singapore
| | - Nguan Soon Tan
- School of Biological Sciences , Nanyang Technological University , 637551 , Singapore
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering , Nanyang Technological University , 62 Nanyang Drive , 637459 , Singapore
- Centre for Antimicrobial Bioengineering , Nanyang Technological University , 637459 , Singapore
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44
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Pranantyo D, Xu LQ, Kang ET, Chan-Park MB. Chitosan-Based Peptidopolysaccharides as Cationic Antimicrobial Agents and Antibacterial Coatings. Biomacromolecules 2018; 19:2156-2165. [DOI: 10.1021/acs.biomac.8b00270] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Dicky Pranantyo
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Kent Ridge, Singapore 117585
| | - Li Qun Xu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Kent Ridge, Singapore 117585
| | - En-Tang Kang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Kent Ridge, Singapore 117585
| | - Mary B. Chan-Park
- Centre of Antimicrobial Bioengineering School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459
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45
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Chilambi GS, Gao IH, Yoon BK, Park S, Kawakami LM, Ravikumar V, Chan-Park MB, Cho NJ, Bazan GC, Kline KA, Rice SA, Hinks J. Membrane adaptation limitations inEnterococcus faecalisunderlie sensitivity and the inability to develop significant resistance to conjugated oligoelectrolytes. RSC Adv 2018; 8:10284-10293. [PMID: 35540442 PMCID: PMC9078823 DOI: 10.1039/c7ra11823f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 03/01/2018] [Indexed: 11/21/2022] Open
Abstract
COEs are emerging antimicrobials to combat drug resistant infections and to which bacteria develop only limited resistance.
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46
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Mallick A, Xu Y, Lin Y, He J, Chan-Park MB, Liu XW. Oxadiazabicyclooctenone as a versatile monomer for the construction of pH sensitive functional polymers via ROMP. Polym Chem 2018. [DOI: 10.1039/c7py01413a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Herein, oxadiazabicyclooctenone is successfully developed as a versatile monomer for the construction of new pH-sensitive polymers by ROMP.
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Affiliation(s)
- Asadulla Mallick
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - Yuan Xu
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - Yichao Lin
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
| | - Jingxi He
- Centre of Antimicrobial Bioengineering
- School of Chemical and Biomedical Engineering
- NTU
- Singapore 637459
| | - Mary B. Chan-Park
- Centre of Antimicrobial Bioengineering
- School of Chemical and Biomedical Engineering
- NTU
- Singapore 637459
| | - Xue-Wei Liu
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- Centre of Antimicrobial Bioengineering
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47
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Abstract
Teixobactin (TXB) is a newly discovered antibiotic targeting the bacterial cell wall precursor Lipid II (LII). In the present work, four binding modes of TXB on LII were identified by a contact-map based clustering method. The highly flexible binary complex ensemble was generated by parallel tempering metadynamics simulation in a well-tempered ensemble (PTMetaD-WTE). In agreement with experimental findings, the pyrophosphate group and the attached first sugar subunit of LII are found to be the minimal motif for stable TXB binding. Three of the four binding modes involve the ring structure of TXB and have relatively higher binding affinities, indicating the importance of the ring motif of TXB in LII recognition. TXB-LII complexes with a ratio of 2:1 are also predicted with configurations such that the ring motif of two TXB molecules bound to the pyrophosphate-MurNAc moiety and the glutamic acid residue of one LII, respectively. Our findings disclose that the ring motif of TXB is critical to LII binding and novel antibiotics can be designed based on its mimetics.
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Affiliation(s)
- Yang Liu
- School of Biological Sciences, Nanyang Technological University (NTU), 60 Nanyang Drive, Singapore, 637551, Singapore
| | - Yaxin Liu
- School of Biological Sciences, Nanyang Technological University (NTU), 60 Nanyang Drive, Singapore, 637551, Singapore
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University (NTU), 62 Nanyang Drive, Singapore, 637459, Singapore.,Centre for Antimicrobial Bioengineering, NTU, 60 Nanyang Drive, Singapore, 637551, Singapore
| | - Yuguang Mu
- School of Biological Sciences, Nanyang Technological University (NTU), 60 Nanyang Drive, Singapore, 637551, Singapore.
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48
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Hou Z, Shankar YV, Liu Y, Ding F, Subramanion JL, Ravikumar V, Zamudio-Vázquez R, Keogh D, Lim H, Tay MYF, Bhattacharjya S, Rice SA, Shi J, Duan H, Liu XW, Mu Y, Tan NS, Tam KC, Pethe K, Chan-Park MB. Nanoparticles of Short Cationic Peptidopolysaccharide Self-Assembled by Hydrogen Bonding with Antibacterial Effect against Multidrug-Resistant Bacteria. ACS Appl Mater Interfaces 2017; 9:38288-38303. [PMID: 29028315 DOI: 10.1021/acsami.7b12120] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Cationic antimicrobial peptides (AMPs) and polymers are active against many multidrug-resistant (MDR) bacteria, but only a limited number of these compounds are in clinical use due to their unselective toxicity. The typical strategy for achieving selective antibacterial efficacy with low mammalian cell toxicity is through balancing the ratio of cationicity to hydrophobicity. Herein, we report a cationic nanoparticle self-assembled from chitosan-graft-oligolysine (CSM5-K5) chains with ultralow molecular weight (1450 Da) that selectively kills bacteria. Further, hydrogen bonding rather than the typical hydrophobic interaction causes the polymer chains to be aggregated together in water into small nanoparticles (with about 37 nm hydrodynamic radius) to concentrate the cationic charge of the lysine. When complexed with bacterial membrane, these cationic nanoparticles synergistically cluster anionic membrane lipids and produce a greater membrane perturbation and antibacterial effect than would be achievable by the same quantity of charge if dispersed in individual copolymer molecules in solution. The small zeta potential (+15 mV) and lack of hydrophobicity of the nanoparticles impedes the insertion of the copolymer into the cell bilayer to improve biocompatibility. In vivo study (using a murine excisional wound model) shows that CSM5-K5 suppresses the growth of methicillin-resistant Staphylococcus aureus (MRSA) bacteria by 4.0 orders of magnitude, an efficacy comparable to that of the last resort MRSA antibiotic vancomycin; it is also noninflammatory with little/no activation of neutrophils (CD11b and Ly6G immune cells). This study demonstrates a promising new class of cationic polymers-short cationic peptidopolysaccharides-that effectively attack MDR bacteria due to the synergistic clustering of, rather than insertion into, bacterial anionic lipids by the concentrated polymers in the resulting hydrogen-bonding-stabilized cationic nanoparticles.
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Affiliation(s)
| | | | - Yang Liu
- School of Biological Sciences, Nanyang Technological University , 62 Nanyang Drive, Singapore 637551, Singapore
| | | | | | - Vikashini Ravikumar
- Singapore Center for Environmental and Life Sciences (SCELSE) , 60 Nanyang Drive, Singapore 637551, Singapore
| | | | | | - Huiwen Lim
- Lee Kong Chian School of Medicine, Nanyang Technological University , 11 Mandalay Road, Singapore 308232, Singapore
| | - Moon Yue Feng Tay
- Nanyang Technological University Food Technology Centre (NAFTEC), Nanyang Technological University , 62 Nanyang Drive, Singapore 637459, Singapore
| | - Surajit Bhattacharjya
- School of Biological Sciences, Nanyang Technological University , 62 Nanyang Drive, Singapore 637551, Singapore
| | - Scott A Rice
- School of Biological Sciences, Nanyang Technological University , 62 Nanyang Drive, Singapore 637551, Singapore
- Singapore Center for Environmental and Life Sciences (SCELSE) , 60 Nanyang Drive, Singapore 637551, Singapore
| | - Jian Shi
- NUS Centre for Bioimaging Sciences, National University of Singapore , 14 Science Drive 4, Singapore 117557, Singapore
| | | | - Xue-Wei Liu
- Division of Chemistry and Biological Chemistry, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Yuguang Mu
- School of Biological Sciences, Nanyang Technological University , 62 Nanyang Drive, Singapore 637551, Singapore
| | - Nguan Soon Tan
- School of Biological Sciences, Nanyang Technological University , 62 Nanyang Drive, Singapore 637551, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University , 11 Mandalay Road, Singapore 308232, Singapore
| | - Kam C Tam
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo , 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Kevin Pethe
- Lee Kong Chian School of Medicine, Nanyang Technological University , 11 Mandalay Road, Singapore 308232, Singapore
| | - Mary B Chan-Park
- School of Biological Sciences, Nanyang Technological University , 62 Nanyang Drive, Singapore 637551, Singapore
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49
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Le Mai Hoang K, He JX, Báti G, Chan-Park MB, Liu XW. A minimalist approach to stereoselective glycosylation with unprotected donors. Nat Commun 2017; 8:1146. [PMID: 29079775 PMCID: PMC5660076 DOI: 10.1038/s41467-017-01073-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 08/16/2017] [Indexed: 12/30/2022] Open
Abstract
Mechanistic study of carbohydrate interactions in biological systems calls for the chemical synthesis of these complex structures. Owing to the specific stereo-configuration at each anomeric linkage and diversity in branching, significant breakthroughs in recent years have focused on either stereoselective glycosylation methods or facile assembly of glycan chains. Here, we introduce the unification approach that offers both stereoselective glycosidic bond formation and removal of protection/deprotection steps required for further elongation. Using dialkylboryl triflate as an in situ masking reagent, a wide array of glycosyl donors carrying one to three unprotected hydroxyl groups reacts with various glycosyl acceptors to furnish the desired products with good control over regioselectivity and stereoselectivity. This approach demonstrates the feasibility of straightforward access to important structural scaffolds for complex glycoconjugate synthesis. Oligosaccharide synthesis is encumbered by multiple protection and deprotection steps. Here, the authors report a protection-free yet stereoselective and regioselective glycosylation strategy using boron-masked glycosyl donors, and demonstrate efficient synthesis of oligosaccharides over a wide substrate scope.
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Affiliation(s)
- Kim Le Mai Hoang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Jing-Xi He
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Gábor Báti
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore.
| | - Xue-Wei Liu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore.
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50
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Zhou C, Wu Y, Thappeta KRV, Subramanian JTL, Pranantyo D, Kang ET, Duan H, Kline K, Chan-Park MB. In Vivo Anti-Biofilm and Anti-Bacterial Non-Leachable Coating Thermally Polymerized on Cylindrical Catheter. ACS Appl Mater Interfaces 2017; 9:36269-36280. [PMID: 28945343 DOI: 10.1021/acsami.7b07053] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Catheters are indispensable tools of modern medicine, but catheter-associated infection is a significant clinical problem, even when stringent sterile protocols are observed. When the bacteria colonize catheter surfaces, they tend to form biofilms making them hard to treat with conventional antibiotics. Hence, there is a great need for inherently antifouling and antibacterial catheters that prevent bacterial colonization. This paper reports the preparation of nonleachable antibiofilm and antibacterial cationic film coatings directly polymerized from actual tubular silicone catheter surfaces via the technique of supplemental activator and reducing agent surface-initiated atom-transfer radical polymerization (SARA SI-ATRP). Three cross-linked cationic coatings containing (3-acrylamidopropyl) trimethylammonium chloride (AMPTMA) or quaternized polyethylenimine methacrylate (Q-PEI-MA) together with a cross-linker (polyethylene glycol dimethacrylate, PEGDMA) were tested. The in vivo antibacterial and antibiofilm effect of these nonleachable covalently linked coatings (using a mouse catheter model) can be tuned to achieve 1.95 log (98.88%) reduction and 1.26 log (94.51%) reduction of clinically relevant pathogenic bacteria (specifically with methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus faecalis (VRE)). Our good in vivo bactericidal killing results using the murine catheter-associated urinary tract infection (CAUTI) model show that SARA SI-ATRP grafting-from technique is a viable technique for making nonleachable antibiofilm coating even on "small" (0.30/0.64 mm inner/outer diameter) catheter.
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Affiliation(s)
- Chao Zhou
- School of Chemical and Biomedical Engineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
| | - Yang Wu
- School of Chemical and Biomedical Engineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
| | - Kishore Reddy Venkata Thappeta
- Singapore Centre for Environmental Life Science Engineering (SCELSE), School of Biological Sciences, Nanyang Technological University , 60 Nanyang Drive, Singapore 637551
| | - Jo Thy Lachumy Subramanian
- School of Chemical and Biomedical Engineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
| | - Dicky Pranantyo
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, Singapore 117585
| | - En-Tang Kang
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, Singapore 117585
| | - Hongwei Duan
- School of Chemical and Biomedical Engineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
| | - Kimberly Kline
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
- Singapore Centre for Environmental Life Science Engineering (SCELSE), School of Biological Sciences, Nanyang Technological University , 60 Nanyang Drive, Singapore 637551
| | - Mary B Chan-Park
- School of Chemical and Biomedical Engineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
- Centre for Antimicrobial Bioengineering, Nanyang Technological University , 62 Nanyang Drive, Singapore 637459
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