1
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He B, Li Y, Li M, Kang M, Liu X, Huang J, Wang D, Lam JWY, Tang BZ. Pyridinium-Yne Click Polymerization: A Facile Strategy toward Functional Poly(Vinylpyridinium Salt)s with Multidrug-Resistant Bacteria Killing Ability. Angew Chem Int Ed Engl 2024; 63:e202405030. [PMID: 38695837 DOI: 10.1002/anie.202405030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Indexed: 06/11/2024]
Abstract
Polymeric materials with antibacterial properties hold great promise for combating multidrug-resistant bacteria, which pose a significant threat to public health. However, the synthesis of most antibacterial polymers typically involves complicated and time-consuming procedures. In this study, we demonstrate a simple and efficient strategy for synthesizing functional poly(vinylpyridinium salt)s via pyridinium-yne click polymerization. This click polymerization could proceed with high atom economy under mild conditions without any external catalyst, yielding soluble and thermally stable poly(vinylpyridinium salt)s with satisfactory molecular weights and well-defined structures in excellent yields. Additionally, the incorporation of luminescent units such as fluorene, tetraphenylethylene, and triphenylamine into the polymer backbone confers excellent aggregation-enhanced emission properties upon the resulting polymers, rendering them suitable for bacterial staining. Moreover, the existence of pyridinium salt imparts intrinsic antibacterial activity against multidrug-resistant bacteria to the polymers, enabling them to effectively inhibit wound bacterial infection and significantly expedite the healing process. This work not only provides an efficient method to prepare antibacterial polymers, but also opens up the possibility of various applications of polymers in healthcare and other antibacterial fields.
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Affiliation(s)
- Benzhao He
- Center for Advanced Materials Research, Instrumentation and Service Center for Science and Technology, Beijing Normal University, Zhuhai, 519085, China
- Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates (South China University of Technology), Guangzhou, 510640, China
| | - Ying Li
- Innovation Research Center for AIE Pharmaceutical Biology, School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, 511436, China
| | - Meng Li
- Center for AIE Research, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Miaomiao Kang
- Center for AIE Research, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Xinyue Liu
- Department of Chemistry, The Hong Kong University of Science & Technology, Kowloon, Hong Kong, China
| | - Jiachang Huang
- Center for Advanced Materials Research, Instrumentation and Service Center for Science and Technology, Beijing Normal University, Zhuhai, 519085, China
- Center for AIE Research, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Dong Wang
- Center for AIE Research, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Jacky W Y Lam
- Department of Chemistry, The Hong Kong University of Science & Technology, Kowloon, Hong Kong, China
| | - Ben Zhong Tang
- Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates (South China University of Technology), Guangzhou, 510640, China
- School of Science and Engineering, Shenzhen Institute of Aggregate Science and Technology, The Chinese University of Hong Kong, Shenzhen (CUHK-Shenzhen), Guangdong, 518172, China
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2
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Nabawy A, Makabenta JM, Park J, Huang R, Nayar V, Patel R, Rotello VM. Nature-Derived Gelatin-Based Antifungal Nanotherapeutics for combatting Candida albicans Biofilms. ENVIRONMENTAL SCIENCE. NANO 2024; 11:637-644. [PMID: 38841652 PMCID: PMC11149111 DOI: 10.1039/d3en00372h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
Infections caused by fungi are emerging global health challenges that are exacerbated by the formation of fungal biofilms. Further challenges arise from environmental contamination with antifungal agents, which promotes environmental acquisition of antifungal resistance. We report the generation of an efficient, sustainable, all-natural antifungal nanotherapeutic based on the integration of an antimicrobial natural essential oil into a gelatin-based nanoemulsion platform. Carvacrol-loaded gelatin nanoemulsions penetrated Candida albicans biofilms, resulting in death of C. albicans cells in biofilms, and displayed selective biofilm elimination without harmful effects on fibroblast cells in a fungal biofilm-mammalian fibroblast co-culture model. Furthermore, the nanoemulsions degraded in the presence of physiologically relevant biomolecules, reducing the potential for environmental pollution and ecotoxicity. Overall, the sustainability, and efficacy of the described gelatin nanoemulsion formulation provides an environmentally friendly strategy for treating biofilm-associated fungal infections, including those caused by drug-resistant fungi.
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Affiliation(s)
- Ahmed Nabawy
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003
| | - Jessa Marie Makabenta
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003
| | - Jungmi Park
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003
| | - Rui Huang
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003
| | - Varun Nayar
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003
| | - Robin Patel
- Division of Clinical Microbiology, Department of Laboratory Medicine and Pathology, and Division of Public Health, Infectious Diseases and Occupational Medicine, Department of Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55905
| | - Vincent M. Rotello
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003
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3
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Makabenta JMV, Nabawy A, Chattopadhyay AN, Park J, Li CH, Goswami R, Luther DC, Huang R, Hassan MA, Rotello VM. Antimicrobial-loaded biodegradable nanoemulsions for efficient clearance of intracellular pathogens in bacterial peritonitis. Biomaterials 2023; 302:122344. [PMID: 37857021 PMCID: PMC10872928 DOI: 10.1016/j.biomaterials.2023.122344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 10/02/2023] [Accepted: 10/03/2023] [Indexed: 10/21/2023]
Abstract
Intracellular pathogenic bacteria use immune cells as hosts for bacterial replication and reinfection, leading to challenging systemic infections including peritonitis. The spread of multidrug-resistant (MDR) bacteria and the added barrier presented by host cell internalization limit the efficacy of standard antibiotic therapies for treating intracellular infections. We present a non-antibiotic strategy to treat intracellular infections. Antimicrobial phytochemicals were stabilized and delivered by polymer-stabilized biodegradable nanoemulsions (BNEs). BNEs were fabricated using different phytochemicals, with eugenol-loaded BNEs (E-BNEs) affording the best combination of antimicrobial efficacy, macrophage accumulation, and biocompatibility. The positively-charged polymer groups of the E-BNEs bind to the cell surface of macrophages, facilitating the entry of eugenol that then kills the intracellular bacteria without harming the host cells. Confocal imaging and flow cytometry confirmed that this entry occurred mainly via cholesterol-dependent membrane fusion. As eugenol co-localized and interacted with intracellular bacteria, antibacterial efficacy was maintained. E-BNEs reversed the immunosuppressive effects of MRSA on macrophages. Notably, E-BNEs did not elicit resistance selection after multiple exposures of MRSA to sub-therapeutic doses. The E-BNEs were highly effective against a murine model of MRSA-induced peritonitis with better bacterial clearance (99 % bacteria reduction) compared to clinically-employed treatment with vancomycin. Overall, these findings demonstrate the potential of E-BNEs in treating peritonitis and other refractory intracellular infections.
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Affiliation(s)
- Jessa Marie V Makabenta
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA, 01003, United States
| | - Ahmed Nabawy
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA, 01003, United States
| | - Aritra Nath Chattopadhyay
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA, 01003, United States
| | - Jungmi Park
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA, 01003, United States
| | - Cheng-Hsuan Li
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA, 01003, United States
| | - Ritabrita Goswami
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA, 01003, United States
| | - David C Luther
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA, 01003, United States
| | - Rui Huang
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA, 01003, United States
| | - Muhammad Aamir Hassan
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA, 01003, United States
| | - Vincent M Rotello
- Department of Chemistry, University of Massachusetts Amherst, 710 North Pleasant Street, Amherst, MA, 01003, United States.
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4
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Cavallazzi Sebold B, Li J, Ni G, Fu Q, Li H, Liu X, Wang T. Going Beyond Host Defence Peptides: Horizons of Chemically Engineered Peptides for Multidrug-Resistant Bacteria. BioDrugs 2023; 37:607-623. [PMID: 37300748 PMCID: PMC10432368 DOI: 10.1007/s40259-023-00608-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2023] [Indexed: 06/12/2023]
Abstract
Multidrug-resistant (MDR) bacteria are considered a health threat worldwide, and this problem is set to increase over the decades. The ESKAPE, a group of six pathogens including Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa and Enterobacter spp. is the major source of concern due to their high death incidence and nosocomial acquired infection. Host defence peptides (HDPs) are a class of ribosomally synthesised peptides that have shown promising results in combating MDR, including the ESKAPE group, in- and outside bacterial biofilms. However, their poor pharmacokinetics in physiological mediums may impede HDPs from becoming viable clinical candidates. To circumvent this problem, chemical engineering of HDPs has been seen as an emergent approach to not only improve their pharmacokinetics but also their efficacy against pathogens. In this review, we explore several chemical modifications of HDPs that have shown promising results, especially against ESKAPE pathogens, and provide an overview of the current findings with respect to each modification.
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Affiliation(s)
- Bernardo Cavallazzi Sebold
- Centre for Bioinnovation, University of the Sunshine Coast, Maroochydore BC, QLD, 4558, Australia
- School of Science, Engineering and Technology, University of the Sunshine Coast, Maroochydore BC, QLD, 4558, Australia
| | - Junjie Li
- The First Affiliated Hospital/Clinical Medical School, Guangdong Pharmaceutical University, Guangzhou, 510080, Guangdong, China
| | - Guoying Ni
- Centre for Bioinnovation, University of the Sunshine Coast, Maroochydore BC, QLD, 4558, Australia
- The First Affiliated Hospital/Clinical Medical School, Guangdong Pharmaceutical University, Guangzhou, 510080, Guangdong, China
- Cancer Research Institute, First People's Hospital of Foshan, Foshan, 528000, Guangdong, China
| | - Quanlan Fu
- The First Affiliated Hospital/Clinical Medical School, Guangdong Pharmaceutical University, Guangzhou, 510080, Guangdong, China
| | - Hejie Li
- Centre for Bioinnovation, University of the Sunshine Coast, Maroochydore BC, QLD, 4558, Australia
- School of Science, Engineering and Technology, University of the Sunshine Coast, Maroochydore BC, QLD, 4558, Australia
| | - Xiaosong Liu
- The First Affiliated Hospital/Clinical Medical School, Guangdong Pharmaceutical University, Guangzhou, 510080, Guangdong, China.
- Cancer Research Institute, First People's Hospital of Foshan, Foshan, 528000, Guangdong, China.
| | - Tianfang Wang
- Centre for Bioinnovation, University of the Sunshine Coast, Maroochydore BC, QLD, 4558, Australia.
- School of Science, Engineering and Technology, University of the Sunshine Coast, Maroochydore BC, QLD, 4558, Australia.
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5
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Abdelbasir SM, Rayan DA, Ismail MM. Synthesis of Cu and CuO nanoparticles from e-waste and evaluation of their antibacterial and photocatalytic properties. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:89690-89704. [PMID: 37458881 PMCID: PMC10412494 DOI: 10.1007/s11356-023-28437-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 06/21/2023] [Indexed: 08/11/2023]
Abstract
Waste printed circuit boards (WPCBs) contain a plethora of valuable metals, considered an attractive secondary resource. In the current research, a hydrometallurgical process combined ammonia/ammonium chloride leaching and reduction (using L-ascorbic acid) to recover copper and its oxide (CuO) as nanosized particles from WPCBs was investigated. The results of leaching indicated that 96.7% of copper could be recovered at a temperature of 35 °C for a leaching duration of 2 h with ammonium chloride and ammonia concentration of 2 mol/L at a solid:liquid ratio of 1:10 g/cm3. The synthesized particles exhibit spherical and distorted sphere morphology with average particle size of 460 nm and 50 nm for Cu and CuO NPs, respectively. The antibacterial activity of Cu, CuO, and a (1:1) blend of both (Cu/CuO) has been examined against five different bacterial and fungal strains. The highest zone of inhibition was measured as 21.2 mm for Cu NPs toward Escherichia coli and 16.7 mm for Cu/CuO blend toward Bacillus cereus bacteria. The highest zone of inhibition was measured as 13 mm and 13.8 mm for Cu/CuO blend toward Fusarium proliferatum and Penicillium verrucosum fungi. Cu/CuO blend showed notable photocatalytic activity towards Rhodamine B dye under visible light irradiation with 96% degradation rate within 120 min. Using the process developed in this study, copper and its oxide as nanoparticles can be produced from WPCBs and used for multifunctional applications.
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Affiliation(s)
- Sabah M Abdelbasir
- Central Metallurgical R&D Institute (CMRDI), P.O. Box 87, Helwan, Cairo, 11421, Egypt.
| | - Diaa A Rayan
- Central Metallurgical R&D Institute (CMRDI), P.O. Box 87, Helwan, Cairo, 11421, Egypt
- Department of Physics, Deraya University, New Minya, Minya, Egypt
| | - Mahmoud M Ismail
- Physics Department, Faculty of Science, Al-Azhar Unversity, Nasr City, Cairo, 11884, Egypt
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6
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Lin C, Ma Z, Gao Y, Le M, Shi Z, Qi D, Ma JC, Cui ZK, Wang L, Jia YG. Main-Chain Cationic Bile Acid Polymers Mimicking Facially Amphiphilic Antimicrobial Peptides. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37400427 DOI: 10.1021/acsami.3c06424] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/05/2023]
Abstract
Antibiotic-resistant bacterial infections have led to an increased demand for antibacterial agents that do not contribute to antimicrobial resistance. Antimicrobial peptides (AMPs) with the facially amphiphilic structures have demonstrated remarkable effectiveness, including the ability to suppress antibiotic resistance during bacterial treatment. Herein, inspired by the facially amphiphilic structure of AMPs, the facially amphiphilic skeletons of bile acids (BAs) are utilized as building blocks to create a main-chain cationic bile acid polymer (MCBAP) with macromolecular facial amphiphilicity via polycondensation and a subsequent quaternization. The optimal MCBAP displays an effective activity against Gram-positive methicillin-resistant Staphylococcus aureus (MRSA) and Gram-negative Escherichia coli, fast killing efficacy, superior bactericidal stability in vitro, and potent anti-infectious performance in vivo using the MRSA-infected wound model. MCBAP shows the low possibility to develop drug-resistant bacteria after repeated exposure, which may ascribe to the macromolecular facial amphiphilicity promoting bacterial membrane disruption and the generation of reactive oxygen species. The easy synthesis and low cost of MCBAP, the superior antimicrobial performance, and the therapeutic potential in treating MRSA infection altogether demonstrate that BAs are a promising group of building blocks to mimic the facially amphiphilic structure of AMPs in treating MRSA infection and alleviating antibiotic resistance.
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Affiliation(s)
- Caihong Lin
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Zunwei Ma
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Yunpeng Gao
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Mengqi Le
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Zhifeng Shi
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Dawei Qi
- MediCity Research Laboratory, University of Turku, Turku 20520, Finland
| | - Jian-Chao Ma
- School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Zhong-Kai Cui
- School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, China
| | - Lin Wang
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
- Key Laboratory of Biomedical Engineering of Guangdong Province; Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education; Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
| | - Yong-Guang Jia
- School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China
- National Engineering Research Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
- Key Laboratory of Biomedical Engineering of Guangdong Province; Key Laboratory of Biomedical Materials and Engineering of the Ministry of Education; Innovation Center for Tissue Restoration and Reconstruction, South China University of Technology, Guangzhou 510006, China
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7
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Makvandi P, Song H, Yiu CKY, Sartorius R, Zare EN, Rabiee N, Wu WX, Paiva-Santos AC, Wang XD, Yu CZ, Tay FR. Bioengineered materials with selective antimicrobial toxicity in biomedicine. Mil Med Res 2023; 10:8. [PMID: 36829246 PMCID: PMC9951506 DOI: 10.1186/s40779-023-00443-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 01/31/2023] [Indexed: 02/26/2023] Open
Abstract
Fungi and bacteria afflict humans with innumerous pathogen-related infections and ailments. Most of the commonly employed microbicidal agents target commensal and pathogenic microorganisms without discrimination. To distinguish and fight the pathogenic species out of the microflora, novel antimicrobials have been developed that selectively target specific bacteria and fungi. The cell wall features and antimicrobial mechanisms that these microorganisms involved in are highlighted in the present review. This is followed by reviewing the design of antimicrobials that selectively combat a specific community of microbes including Gram-positive and Gram-negative bacterial strains as well as fungi. Finally, recent advances in the antimicrobial immunomodulation strategy that enables treating microorganism infections with high specificity are reviewed. These basic tenets will enable the avid reader to design novel approaches and compounds for antibacterial and antifungal applications.
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Affiliation(s)
- Pooyan Makvandi
- Istituto Italiano di Tecnologia, Centre for Materials Interfaces, Pontedera, 56025, Italy. .,The Quzhou Affiliated Hospital of Wenzhou Medical University, Quzhou People's Hospital, Quzhou, 324000, Zhejiang, China.
| | - Hao Song
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Cynthia K Y Yiu
- Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Prince Philip Dental Hospital, Hong Kong SAR, China
| | - Rossella Sartorius
- Institute of Biochemistry and Cell Biology (IBBC), National Research Council (CNR), 80131, Naples, Italy
| | | | - Navid Rabiee
- School of Engineering, Macquarie University, Sydney, NSW, 2109, Australia.,Centre for Molecular Medicine and Innovative Therapeutics, Murdoch University, Perth, WA, 6150, Australia
| | - Wei-Xi Wu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Ana Cláudia Paiva-Santos
- Department of Pharmaceutical Technology, Faculty of Pharmacy of the University of Coimbra, University of Coimbra, 3000-548, Coimbra, Portugal.,REQUIMTE/LAQV, Group of Pharmaceutical Technology, Faculty of Pharmacy of the University of Coimbra, University of Coimbra, 3000-548, Coimbra, Portugal
| | - Xiang-Dong Wang
- Department of Pulmonary and Critical Care Medicine, Zhongshan Hospital, Fudan University Shanghai Medical College, Shanghai, 200032, China
| | - Cheng-Zhong Yu
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia.,School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Franklin R Tay
- The Graduate School, Augusta University, Augusta, GA, 30912, USA.
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8
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Wang J, Li P, Wang N, Wang J, Xing D. Antibacterial features of material surface: strong enough to serve as antibiotics? J Mater Chem B 2023; 11:280-302. [PMID: 36533438 DOI: 10.1039/d2tb02139k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Bacteria are small but need big efforts to control. The use of antibiotics not only produces superbugs that are increasingly difficult to inactivate, but also raises environmental concerns with the growing consumption. It is now believed that the antibacterial task can count on some physiochemical features of material surfaces, which can be anti-adhesive or bactericidal without releasing toxicants. It is necessary to evaluate to what extent can we rely on the surface design since the actual application scenarios will need the antibacterial performance to be sharp, robust, environmentally friendly, and long-lasting. Herein, we review the recent laboratory advances that have been classified based on the specific surface features, including hydrophobicity, charge potential, micromorphology, stiffness and viscosity, and photoactivity, and the antibacterial mechanisms of each feature are included to provide a basic rationale for future design. The significance of anti-biofilms is also introduced, given the big role of biofilms in bacteria-caused damage. A perspective on the potential wide application of antibacterial surface features as a substitute or supplement to antibiotics is then discussed. Surface design is no doubt a solution worthy to explore, and future success will be a result of further progress in multiple directions, including mechanism study and material preparation.
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Affiliation(s)
- Jie Wang
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao 266071, China. .,CAS Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, China Academy of Sciences, Qingdao 266071, China.
| | - Ping Li
- School of Rehabilitation Sciences and Engineering, University of Health and Rehabilitation Sciences, Qingdao 266071, China
| | - Ning Wang
- CAS Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, China Academy of Sciences, Qingdao 266071, China.
| | - Jing Wang
- CAS Key Laboratory of Marine Environmental Corrosion and Bio-Fouling, Institute of Oceanology, China Academy of Sciences, Qingdao 266071, China.
| | - Dongming Xing
- The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao 266071, China.
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9
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Sikder A, Pearce AK, Kumar CMS, O'Reilly RK. Elucidating the role of multivalency, shape, size and functional group density on antibacterial activity of diversified supramolecular nanostructures enabled by templated assembly. MATERIALS HORIZONS 2023; 10:171-178. [PMID: 36321619 PMCID: PMC9810103 DOI: 10.1039/d2mh01117d] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
With the increased prevalence of antibiotic-resistant infections, there is an urgent need to develop novel antibacterial materials. In addition, gaining a complete understanding of the structural features that impart activity toward target microorganisms is essential to enable materials optimisation. Here we have reported a rational design to fabricate antibacterial supramolecular nanoparticles with variable shape, size and cationic group density, by exploiting noncovalent interactions between a shape determining template amphiphile and a cationic amphiphile to introduce charge on the nanoparticle surface. We have shown that the monomeric cationic amphiphile alone showed poor antibacterial activity, whereas nanostructures formed by co-assembling the complementary units showed significantly enhanced antibacterial efficiency. Further, the systematic variation of several structural parameters such as shape, spacing between the cationic groups and size of these nanostructures allowed us to elicit the role of each parameter on the overall antibacterial properties. Finally, we investigated the origin of the differing antibacterial activity of these nanoparticles having different shape and size but with the same molecular composition, by comparing the thermodynamic parameters of their binding interactions with a bacterial membrane mimic.
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Affiliation(s)
- Amrita Sikder
- School of Chemistry, University of Birmingham, Birmingham, B15 2TT, UK.
| | - Amanda K Pearce
- School of Chemistry, University of Birmingham, Birmingham, B15 2TT, UK.
| | - C M Santosh Kumar
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Birmingham, B15 2TT, UK
| | - Rachel K O'Reilly
- School of Chemistry, University of Birmingham, Birmingham, B15 2TT, UK.
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10
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Xu X, Wang Q, Chang Y, Zhang Y, Peng H, Whittaker AK, Fu C. Antifouling and Antibacterial Surfaces Grafted with Sulfur-Containing Copolymers. ACS APPLIED MATERIALS & INTERFACES 2022; 14:41400-41411. [PMID: 36040859 DOI: 10.1021/acsami.2c09698] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Antifouling and antibacterial surfaces that can prevent nonspecific biological adhesion are important to support a myriad of biomedical applications. In this study, we have used an innovative photopolymerization technology to develop sulfur-containing polymer-grafted antifouling and antibacterial surfaces. The relationship between the hydrophilic property and the capability to resist protein and macrophage adsorption of the surface copolymer brushes was investigated. The sulfide monomer incorporated into the surface copolymer brushes can be further ionized to carry positive charges and impart antibacterial activity, leading to surfaces with dual antifouling and antibacterial functions. We believe that the reported sulfur-containing polymer brushes can be considered an emerging and important polymer for antifouling and antibacterial applications.
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Affiliation(s)
- Xin Xu
- Australian Institute for Bioengineering and Nanotechnology and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Qiaoyun Wang
- Australian Institute for Bioengineering and Nanotechnology and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Yixin Chang
- Australian Institute for Bioengineering and Nanotechnology and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Yuhao Zhang
- Australian Institute for Bioengineering and Nanotechnology and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Hui Peng
- Australian Institute for Bioengineering and Nanotechnology and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Andrew K Whittaker
- Australian Institute for Bioengineering and Nanotechnology and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
| | - Changkui Fu
- Australian Institute for Bioengineering and Nanotechnology and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, St Lucia, Queensland 4072, Australia
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11
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Blovský T, Šindelka K, Limpouchová Z, Procházka K. Changes in Ion Concentrations upon the Binding of Short Polyelectrolytes on Phospholipid Bilayers: Computer Study Addressing Interesting Physiological Consequences. Polymers (Basel) 2022; 14:polym14173634. [PMID: 36080710 PMCID: PMC9459791 DOI: 10.3390/polym14173634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 08/21/2022] [Accepted: 08/26/2022] [Indexed: 11/16/2022] Open
Abstract
This computer study was inspired by the experimental observation of Y. Qian et al. published in ACS Applied Materials and Interfaces, 2018 that the short positively charged β-peptide chains and their oligomeric analogues efficiently suppress severe medical problems caused by antimicrobial drug-resistant bacteria despite them not penetrating the bacterial membrane. Our coarse-grained molecular dynamics (dissipative particle dynamics) simulations confirm the tentative explanation of the authors of the experimental study that the potent antimicrobial activity is a result of the entropically driven release of divalent ions (mainly magnesium ions essential for the proper biological function of bacteria) into bulk solution upon the electrostatic binding of β-peptides to the bacterial membrane. The study shows that in solutions containing cations Na+, Ca2+ and Mg2+, and anions Cl−, the divalent cations preferentially concentrate close to the membrane and neutralize the negative charge. Upon the addition of positively charged oligomer chains (models of β-peptides and their analogues), the oligomers electrostatically bind to the membrane replacing divalent ions, which are released into bulk solvent. Our simulations indicate that the entropy of small ions (which controls the behavior of synthetic polyelectrolyte solutions) plays an important role in this and also in other similar biologically important systems.
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Affiliation(s)
- Tomáš Blovský
- The Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Karel Šindelka
- Department of Molecular and Mesoscopic Modelling, Institute of Chemical Process Fundamentals of the Czech Academy of Sciences, v.v.i., Rozvojová 135/1, Suchdol, 165 02 Prague 6, Czech Republic
| | - Zuzana Limpouchová
- The Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic
| | - Karel Procházka
- The Department of Physical and Macromolecular Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic
- Correspondence:
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12
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Affiliation(s)
- Phuong Pham
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine School of Chemical Engineering The University of New South Wales Sydney NSW 2052 Australia
| | - Susan Oliver
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine School of Chemical Engineering The University of New South Wales Sydney NSW 2052 Australia
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design and Australian Centre for NanoMedicine School of Chemical Engineering The University of New South Wales Sydney NSW 2052 Australia
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13
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Chang CH, Chang CH, Yang YW, Chen HY, Yang SJ, Yao WC, Chao CY. Quaternized Amphiphilic Block Copolymers as Antimicrobial Agents. Polymers (Basel) 2022; 14:250. [PMID: 35054658 PMCID: PMC8781064 DOI: 10.3390/polym14020250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/22/2021] [Accepted: 01/04/2022] [Indexed: 11/16/2022] Open
Abstract
In this study, a novel polystyrene-block-quaternized polyisoprene amphipathic block copolymer (PS-b-PIN) is derived from anionic polymerization. Quaternized polymers are prepared through post-quaternization on a functionalized polymer side chain. Moreover, the antibacterial activity of quaternized polymers without red blood cell (RBCs) hemolysis can be controlled by block composition, side chain length, and polymer morphology. The solvent environment is highly related to the polymer morphology, forming micelles or other structures. The polymersome formation would decrease the hemolysis and increase the electron density or quaternized groups density as previous research and our experiment revealed. Herein, the PS-b-PIN with N,N-dimethyldodecylamine as side chain would form a polymersome structure in the aqueous solution to display the best inhibiting bacterial growth efficiency without hemolytic effect. Therefore, the different single-chain quaternized groups play an important role in the antibacterial action, and act as a controllable factor.
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Affiliation(s)
- Chih-Hao Chang
- Department of Orthopedics, National Taiwan University Hospital Jin-Shan Branch, No. 7, Yulu Rd., Wuhu Village, Jinshan Dist., New Taipei City 20844, Taiwan
- Department of Orthopedics, National Taiwan University College of Medicine, National Taiwan University Hospital, No. 1, Section 1, Jen-Ai Road, Taipei 100, Taiwan;
| | - Chih-Hung Chang
- Department of Orthopedic Surgery, Far Eastern Memorial Hospital, No. 21, Section 2, Nanya S. Road, Banciao Dist., New Taipei City 220, Taiwan;
- Graduate School of Biotechnology and Bioengineering, Yuan Ze University, No. 135, Yuan-Tung Road, Chuang-Li Dist., Taoyuan 320, Taiwan
| | - Ya-Wen Yang
- Department of Surgery, National Taiwan University Hospital, No. 7, Chung Shan S. Rd., Taipei 10002, Taiwan;
| | - Hsuan-Yu Chen
- Department of Orthopedics, National Taiwan University College of Medicine, National Taiwan University Hospital, No. 1, Section 1, Jen-Ai Road, Taipei 100, Taiwan;
| | - Shu-Jyuan Yang
- Institute of Biomedical Engineering, College of Medicine and College of Engineering, National Taiwan University, No. 1, Section 1, Jen-Ai Road, Taipei 100, Taiwan;
| | - Wei-Cheng Yao
- Department of Anesthesiology and Pain Medicine, Min-Sheng General Hospital, No. 168, Ching-Kuo Rd., Taoyuan 330, Taiwan;
| | - Chi-Yang Chao
- Department of Materials Science and Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan
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14
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Mary AS, Raghavan VS, Kagula S, Krishnakumar V, Kannan M, Gorthi SS, Rajaram K. Enhanced In Vitro Wound Healing Using PVA/B-PEI Nanofiber Mats: A Promising Wound Therapeutic Agent against ESKAPE and Opportunistic Pathogens. ACS APPLIED BIO MATERIALS 2021; 4:8466-8476. [PMID: 35005922 DOI: 10.1021/acsabm.1c00985] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Opportunistic skin pathogens and their resistance to pre-existing therapeutics are a challenge to normal physiological wound healing processes. Consistent development of antimicrobial agents is required to overcome the complications raised by antimicrobial resistance. An effective alternative proposed in recent research includes the use of antimicrobial nanoparticles or nanobiopolymers. Unfortunately, metallic nanoparticles that have been proven as antimicrobial agents also possess a certain level of toxicity. In this work, we demonstrate the use of a cationic polymer, branched polyethyleneimine (B-PEI), that has been electrospun to obtain a scaffold/fiber (B-PEI NF) mat resulting in a large surface area-to-volume ratio. SEM analysis revealed that the average diameter of the obtained fibers is 240 nm. The formation of nanoscaffold modulates the controlled release of the polymer from the matrix resulting in long-term effects. The antimicrobial and antibiofilm activity of the B-PEI nanofiber (B-PEI NF) was evaluated against ESKAPE pathogens (Pseudomonas aeruginosa and Staphylococcus aureus) and also against Candida albicans. Dose-dependent inhibition was observed for microbial growth and biofilm for all three test organisms, the minimum inhibitory concentration required for inhibiting P. aeruginosa, S. aureus, and C. albicans is 33.125, 26.5, and 19.875 μM, respectively, in 2 mL of bacterial/fungal broth. Crystal violet and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assays showed significant reduction in biomass and cell viability of sessile cells, respectively, within the biofilm after treatment using B-PEI NFs. A B-PEI NF matrix promotes cell migration and wound healing processes by mimicking the extracellular matrix. In vitro wound healing studies showed a fivefold increase in cell migration and wound healing by B-PEI NFs (97% wound coverage in 17 h) when compared to B-PEI (15% wound coverage in 17 h). The in vitro wound healing assays confirmed the biocompatibility and better wound healing activity of B-PEI NF mats.
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Affiliation(s)
- Aarcha Shanmugha Mary
- Department of Microbiology, Central University of Tamil Nadu, Thiruvarur, Tamil Nadu 610005, India
| | - Vikram Srinivasa Raghavan
- Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, Karnataka 560012, India
| | - Sirisha Kagula
- Department of Microbiology, Central University of Tamil Nadu, Thiruvarur, Tamil Nadu 610005, India
| | - Vinodhini Krishnakumar
- Department of Life Sciences, Central University of Tamil Nadu, Thiruvarur, Tamil Nadu 610005, India
| | - Meganathan Kannan
- Department of Life Sciences, Central University of Tamil Nadu, Thiruvarur, Tamil Nadu 610005, India
| | - Sai Siva Gorthi
- Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, Karnataka 560012, India
| | - Kaushik Rajaram
- Department of Microbiology, Central University of Tamil Nadu, Thiruvarur, Tamil Nadu 610005, India
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15
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Lin L, Chi J, Yan Y, Luo R, Feng X, Zheng Y, Xian D, Li X, Quan G, Liu D, Wu C, Lu C, Pan X. Membrane-disruptive peptides/peptidomimetics-based therapeutics: Promising systems to combat bacteria and cancer in the drug-resistant era. Acta Pharm Sin B 2021; 11:2609-2644. [PMID: 34589385 PMCID: PMC8463292 DOI: 10.1016/j.apsb.2021.07.014] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/08/2021] [Accepted: 07/12/2021] [Indexed: 02/05/2023] Open
Abstract
Membrane-disruptive peptides/peptidomimetics (MDPs) are antimicrobials or anticarcinogens that present a general killing mechanism through the physical disruption of cell membranes, in contrast to conventional chemotherapeutic drugs, which act on precise targets such as DNA or specific enzymes. Owing to their rapid action, broad-spectrum activity, and mechanisms of action that potentially hinder the development of resistance, MDPs have been increasingly considered as future therapeutics in the drug-resistant era. Recently, growing experimental evidence has demonstrated that MDPs can also be utilized as adjuvants to enhance the therapeutic effects of other agents. In this review, we evaluate the literature around the broad-spectrum antimicrobial properties and anticancer activity of MDPs, and summarize the current development and mechanisms of MDPs alone or in combination with other agents. Notably, this review highlights recent advances in the design of various MDP-based drug delivery systems that can improve the therapeutic effect of MDPs, minimize side effects, and promote the co-delivery of multiple chemotherapeutics, for more efficient antimicrobial and anticancer therapy.
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Affiliation(s)
- Liming Lin
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
- College of Pharmacy, Jinan University, Guangzhou 511443, China
| | - Jiaying Chi
- College of Pharmacy, Jinan University, Guangzhou 511443, China
| | - Yilang Yan
- College of Pharmacy, Jinan University, Guangzhou 511443, China
| | - Rui Luo
- College of Pharmacy, Jinan University, Guangzhou 511443, China
| | - Xiaoqian Feng
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
- College of Pharmacy, Jinan University, Guangzhou 511443, China
| | - Yuwei Zheng
- College of Pharmacy, Jinan University, Guangzhou 511443, China
| | - Dongyi Xian
- College of Pharmacy, Jinan University, Guangzhou 511443, China
| | - Xin Li
- The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou 510630, China
| | - Guilan Quan
- College of Pharmacy, Jinan University, Guangzhou 511443, China
| | - Daojun Liu
- Shantou University Medical College, Shantou 515041, China
| | - Chuanbin Wu
- College of Pharmacy, Jinan University, Guangzhou 511443, China
| | - Chao Lu
- College of Pharmacy, Jinan University, Guangzhou 511443, China
| | - Xin Pan
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China
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16
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Ghareeb CR, Peddinti BST, Kisthardt SC, Scholle F, Spontak RJ, Ghiladi RA. Toward Universal Photodynamic Coatings for Infection Control. Front Med (Lausanne) 2021; 8:657837. [PMID: 34395464 PMCID: PMC8355428 DOI: 10.3389/fmed.2021.657837] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 06/18/2021] [Indexed: 11/13/2022] Open
Abstract
The dual threats posed by the COVID-19 pandemic and hospital-acquired infections (HAIs) have emphasized the urgent need for self-disinfecting materials for infection control. Despite their highly potent antimicrobial activity, the adoption of photoactive materials to reduce infection transmission in hospitals and related healthcare facilities has been severely hampered by the lack of scalable and cost-effective manufacturing, in which case high-volume production methods for fabricating aPDI-based materials are needed. To address this issue here, we examined the antimicrobial efficacy of a simple bicomponent spray coating composed of the commercially-available UV-photocrosslinkable polymer N-methyl-4(4'-formyl-styryl)pyridinium methosulfate acetal poly(vinyl alcohol) (SbQ-PVA) and one of three aPDI photosensitizers (PSs): zinc-tetra(4-N-methylpyridyl)porphine (ZnTMPyP4+), methylene blue (MB), and Rose Bengal (RB). We applied these photodynamic coatings, collectively termed SbQ-PVA/PS, to a variety of commercially available materials. Scanning electron microscopy (SEM) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) confirmed the successful application of the coatings, while inductively coupled plasma-optical emission spectroscopy (ICP-OES) revealed a photosensitizer loading of 0.09-0.78 nmol PS/mg material. The antimicrobial efficacy of the coated materials was evaluated against methicillin-susceptible Staphylococcus aureus ATCC-29213 and human coronavirus strain HCoV-229E. Upon illumination with visible light (60 min, 400-700 nm, 65 ± 5 mW/cm2), the coated materials inactivated S. aureus by 97-99.999% and HCoV-229E by 92-99.999%, depending on the material and PS employed. Photobleaching studies employing HCoV-229E demonstrated detection limit inactivation (99.999%) even after exposure for 4 weeks to indoor ambient room lighting. Taken together, these results demonstrate the potential for photodynamic SbQ-PVA/PS coatings to be universally applied to a wide range of materials for effectively reducing pathogen transmission.
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Affiliation(s)
- C Roland Ghareeb
- Department of Chemistry, North Carolina State University, Raleigh, NC, United States
| | - Bharadwaja S T Peddinti
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, United States
| | - Samantha C Kisthardt
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, United States
| | - Frank Scholle
- Department of Biological Sciences, North Carolina State University, Raleigh, NC, United States.,Center for Advanced Virus Experimentation, North Carolina State University, Raleigh, NC, United States
| | - Richard J Spontak
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC, United States.,Center for Advanced Virus Experimentation, North Carolina State University, Raleigh, NC, United States.,Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC, United States
| | - Reza A Ghiladi
- Department of Chemistry, North Carolina State University, Raleigh, NC, United States.,Center for Advanced Virus Experimentation, North Carolina State University, Raleigh, NC, United States
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17
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Jones JB, Liu L, Rank LA, Wetzel D, Woods EC, Biok N, Anderson SE, Lee MR, Liu R, Huth S, Sandhu BK, Gellman SH, McBride SM. Cationic Homopolymers Inhibit Spore and Vegetative Cell Growth of Clostridioides difficile. ACS Infect Dis 2021; 7:1236-1247. [PMID: 33739823 PMCID: PMC8130196 DOI: 10.1021/acsinfecdis.0c00843] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A wide range of synthetic polymers have been explored for antimicrobial activity. These materials usually contain both cationic and hydrophobic subunits because these two characteristics are prominent among host-defense peptides. Here, we describe a series of nylon-3 polymers containing only cationic subunits and their evaluation against the gastrointestinal, spore-forming pathogen Clostridioides difficile. Despite their highly hydrophilic nature, these homopolymers showed efficacy against both the vegetative and spore forms of the bacterium, including an impact on C. difficile spore germination. The polymer designated P34 demonstrated the greatest efficacy against C. difficile strains, along with low propensities to lyse human red blood cells or intestinal epithelial cells. To gain insight into the mechanism of P34 action, we evaluated several cell-surface mutant strains of C. difficile to determine the impacts on growth, viability, and cell morphology. The results suggest that P34 interacts with the cell wall, resulting in severe cell bending and death in a concentration-dependent manner. The unexpected finding that nylon-3 polymers composed entirely of cationic subunits display significant activities toward C. difficile should expand the range of other polymers considered for antibacterial applications.
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Affiliation(s)
- Joshua B. Jones
- Department of Microbiology and Immunology, Emory University School of Medicine, Emory Antibiotic Resistance Center, Atlanta, GA, USA
| | - Lei Liu
- Department of Chemistry and Department of Medicine, University of Wisconsin, Madison, WI, USA
| | | | - Daniela Wetzel
- Department of Microbiology and Immunology, Emory University School of Medicine, Emory Antibiotic Resistance Center, Atlanta, GA, USA
| | - Emily C. Woods
- Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Naomi Biok
- Department of Chemistry and Department of Medicine, University of Wisconsin, Madison, WI, USA
| | | | - Myung-ryul Lee
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Runhui Liu
- State Key Laboratory of Bioreactor Engineering, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
| | - Sean Huth
- Department of Chemistry, Princeton University, Princeton, NJ, USA
| | - Brindar K. Sandhu
- Department of Microbiology and Immunology, Emory University School of Medicine, Emory Antibiotic Resistance Center, Atlanta, GA, USA
| | - Samuel H. Gellman
- Department of Chemistry and Department of Medicine, University of Wisconsin, Madison, WI, USA
| | - Shonna M. McBride
- Department of Microbiology and Immunology, Emory University School of Medicine, Emory Antibiotic Resistance Center, Atlanta, GA, USA
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18
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Sanguramath RA, Laadan B, Raz N, Katalan A, Benarroch DJ, Franco A. CuO (1-x)ZnO x nanocomposite with broad spectrum antibacterial activity: application in medical devices and acrylic paints. NANOTECHNOLOGY 2021; 32:215603. [PMID: 33682686 DOI: 10.1088/1361-6528/abe826] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Inappropriate and disproportionate use of antibiotics have led to a rapid increase in antibacterial resistance. Therefore, alternative antibacterial strategies and solutions are sought to overcome any form of resistance to effectively treat and/or prevent the spread of infections. In this study, we report an eco-friendly and scalable approach to produce highly antibacterial CuO(1-x)ZnO x nanocomposite and its inclusion in medical devices and acrylic paint. Nanocomposite has nanoporous structure composed of primary nanocrystallites of Zn+2 ion doped CuO (∼15 nm) phase and pure ZnO (∼10 nm) phase. Nanocomposite exhibit strong antibacterial activity against broad spectrum of bacteria relevant to the biomedical and food industries. At 100 ppm concentration and 2 h contact period, over 5 log reduction was observed against Escherichia coli, Listeria monocytogenes, Methicillin-resistant Staphylococcus aureus and Salmonella enterica Serovar Typhimurium. Nanocomposite incorporated in medical gauze, topical formulation, and acrylic paint exhibit over 4 log reduction against S. aureus. Bactericidal activity is governed by synergetic combination of electrostatic interaction of nanocomposite with bacterial cell envelope and simultaneous generation of reactive oxygen species. Results described here would be of great benefit in developing medical devices, coatings, and paints to eradicate the growth of a wide range of bacterial pathogens.
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19
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Rank LA, Agrawal A, Liu L, Zhu Y, Mustafi M, Weisshaar JC, Gellman SH. Diverse Impacts on Prokaryotic and Eukaryotic Membrane Activities from Hydrophobic Subunit Variation Among Nylon-3 Copolymers. ACS Chem Biol 2021; 16:176-184. [PMID: 33305582 PMCID: PMC8130050 DOI: 10.1021/acschembio.0c00855] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Synthetic, sequence-random polymers that feature a wide range of backbone and side chain structures have been reported to function as mimics of natural host-defense peptides, inhibiting bacterial growth while exerting little or no toxicity toward eukaryotic cells. The common themes among these materials are net positive charge, which is thought to confer preferential action toward prokaryotic vs eukaryotic cells, and the presence of hydrophobic components, which are thought to mediate membrane disruption. This study is based on a set of new binary cationic-hydrophobic nylon-3 copolymers that was designed to ask whether factors beyond net charge and net hydrophobicity influence the biological activity profile. In previous work, we found that nonpolar subunits preorganized by a ring led to copolymers with a diminished tendency to disrupt human cell membranes (as measured via lysis of red blood cells) relative to copolymers containing more flexible nonpolar subunits. An alternative mode of conformational restriction, involving geminal substitution, also minimized hemolysis. Here, we asked whether combining a cyclic constraint and geminal substitution would be synergistic; the combination was achieved by introducing backbone methyl groups to previously described cyclopentyl and cyclohexyl subunits. The new cyclic subunits containing two quaternary backbone carbons (i.e, two sites of geminal substitution) were comparable or slightly superior in terms of antibacterial potency but markedly superior in terms of low hemolytic activity, relative to cyclic subunits lacking the quaternary carbons. However, new cyclic units containing only one quaternary carbon were very hemolytic, which was unanticipated. Variations in net hydrophobicity cannot explain the trend in hemolysis, in contrast to the standard perspective in this field. The impact of each new polymer on live E. coli cells was evaluated via fluorescence microscopy. All new polymers moved rapidly across the outer membrane without large-scale disruption of barrier function. Increasing the number of quaternary carbons in the nonpolar subunit correlated with an increased propensity to permeabilize the cytoplasmic membrane of E. coli cells. Collectively, these findings show that relationships between nonpolar subunit identity and biological activity are influenced by factors in addition to hydrophobicity and charge. We propose that the variation of subunit conformational properties may be one such factor.
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Affiliation(s)
- Leslie A. Rank
- Department of Chemistry, University of Wisconsin – Madison, 1101 University Ave, Madison, Wisconsin 53706, United States
| | - Anurag Agrawal
- Department of Chemistry, University of Wisconsin – Madison, 1101 University Ave, Madison, Wisconsin 53706, United States
| | - Lei Liu
- Department of Chemistry, University of Wisconsin – Madison, 1101 University Ave, Madison, Wisconsin 53706, United States
| | - Yanyu Zhu
- Department of Chemistry, University of Wisconsin – Madison, 1101 University Ave, Madison, Wisconsin 53706, United States
| | - Mainak Mustafi
- Department of Chemistry, University of Wisconsin – Madison, 1101 University Ave, Madison, Wisconsin 53706, United States
| | - James C. Weisshaar
- Department of Chemistry, University of Wisconsin – Madison, 1101 University Ave, Madison, Wisconsin 53706, United States
- Molecular Biophysics Program, University of Wisconsin – Madison, 1101 University Ave, Madison, Wisconsin 53706, United States
| | - Samuel H. Gellman
- Department of Chemistry, University of Wisconsin – Madison, 1101 University Ave, Madison, Wisconsin 53706, United States
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20
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Kopiasz RJ, Tomaszewski W, Kuźmińska A, Chreptowicz K, Mierzejewska J, Ciach T, Jańczewski D. Hydrophilic Quaternary Ammonium Ionenes—Is There an Influence of Backbone Flexibility and Topology on Antibacterial Properties? Macromol Biosci 2020; 20:e2000063. [DOI: 10.1002/mabi.202000063] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 05/11/2020] [Indexed: 01/16/2023]
Affiliation(s)
- Rafał Jerzy Kopiasz
- Faculty of ChemistryWarsaw University of Technology Noakowskiego 3 Warsaw 00‐664 Poland
| | - Waldemar Tomaszewski
- Faculty of ChemistryWarsaw University of Technology Noakowskiego 3 Warsaw 00‐664 Poland
| | - Aleksandra Kuźmińska
- Faculty of Chemical and Process EngineeringWarsaw University of Technology Waryńskiego 1 Warsaw 00‐645 Poland
| | - Karolina Chreptowicz
- Faculty of ChemistryWarsaw University of Technology Noakowskiego 3 Warsaw 00‐664 Poland
| | - Jolanta Mierzejewska
- Faculty of ChemistryWarsaw University of Technology Noakowskiego 3 Warsaw 00‐664 Poland
| | - Tomasz Ciach
- Faculty of Chemical and Process EngineeringWarsaw University of Technology Waryńskiego 1 Warsaw 00‐645 Poland
| | - Dominik Jańczewski
- Faculty of ChemistryWarsaw University of Technology Noakowskiego 3 Warsaw 00‐664 Poland
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21
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Chen A, Karanastasis A, Casey KR, Necelis M, Carone BR, Caputo GA, Palermo EF. Cationic Molecular Umbrellas as Antibacterial Agents with Remarkable Cell-Type Selectivity. ACS APPLIED MATERIALS & INTERFACES 2020; 12:21270-21282. [PMID: 31917544 DOI: 10.1021/acsami.9b19076] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We synthesized a combinatorial library of dendrons that display a cluster of cationic charges juxtaposed with a hydrophobic alkyl chain, using the so-called "molecular umbrella" design approach. Systematically tuning the generation number and alkyl chain length enabled a detailed study of the structure-activity relationships in terms of both hydrophobic content and number of cationic charges. These discrete, unimolecular compounds display rapid and broad-spectrum bactericidal activity comparable to the activity of antibacterial peptides. Micellization was examined by pyrene emission and dynamic light scattering, which revealed that monomeric, individually solvated dendrons are present in aqueous media. The antibacterial mechanism of action is putatively driven by the membrane-disrupting nature of these cationic surfactants, which we confirmed by enzymatic assays on E. coli cells. The hemolytic activity of these dendritic macromolecules is sensitively dependent on the dendron generation and the alkyl chain length. Via structural optimization of these two key design features, we identified a leading candidate with potent broad-spectrum antibacterial activity (4-8 μg/mL) combined with outstanding hemocompatibility (up to 5000 μg/mL). This selected compound is >1000-fold more active against bacteria as compared to red blood cells, which represents one of the highest selectivity index values ever reported for a membrane-disrupting antibacterial agent. Thus, the leading candidate from this initial library screen holds great potential for future applications as a nontoxic, degradable disinfectant.
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Affiliation(s)
- Ao Chen
- Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12054, United States
| | - Apostolos Karanastasis
- Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12054, United States
| | | | | | | | | | - Edmund F Palermo
- Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12054, United States
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22
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Yi N, Chen TTD, Unruangsri J, Zhu Y, Williams CK. Orthogonal functionalization of alternating polyesters: selective patterning of (AB) n sequences. Chem Sci 2019; 10:9974-9980. [PMID: 32015813 PMCID: PMC6968736 DOI: 10.1039/c9sc03756j] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 09/10/2019] [Indexed: 11/21/2022] Open
Abstract
Precision functionalized polyesters, with defined monomer sequences, are prepared using an orthogonal post-polymerization strategy. These polyesters can be synthesized from bio-derived monomers and are targeted to degrade, by hydrolysis processes, to biocompatible diols and diacids; the new structures enabled by this methodology would be very difficult to synthesize by alternative strategies. A series of 9 well-defined highly alternating AB-type copolyesters, containing terminal and internal alkene functionalities, are synthesized in high conversions by the ring-opening copolymerization of epoxides and cyclic anhydrides. Firstly, the polyesters are functionalized by a selective hydroboration-oxidation reaction to exclusively and quantitatively hydroxylate the terminal alkenes, leaving the alternating internal alkenes unreacted. Subsequently, the internal alkenes are quantitatively transformed into carboxylic acid, amine, alkyl and oligo-ether groups, by thiol-ene reactions, to afford AB polyesters with alternating functional substituents. Three polyesters showing alternating hydrophilic/hydrophobic side-chain sequences self-assemble in solution to form nanostructures that are characterized using transmission electron microscopy and dynamic light scattering methods (R h = 100-300 nm). The selective patterning methodology provides facile, efficient and orthogonal functionalization of alternating polyesters with near-quantitative (AB) n repeat sequences. The method is expected to be generalizable to other polymers and provides access to completely new AB alternating structures with the potential to exploit ligand multi-valency and adjacency to enhance properties.
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Affiliation(s)
- Ni Yi
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , 12 Mansfield Road , Oxford , OX1 3TA , UK .
| | - Thomas T D Chen
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , 12 Mansfield Road , Oxford , OX1 3TA , UK .
| | - Junjuda Unruangsri
- Department of Chemistry , Imperial College London , South Kensington Campus , London , SW7 1AZ , UK
| | - Yunqing Zhu
- Department of Chemistry , Imperial College London , South Kensington Campus , London , SW7 1AZ , UK
| | - Charlotte K Williams
- Chemistry Research Laboratory , Department of Chemistry , University of Oxford , 12 Mansfield Road , Oxford , OX1 3TA , UK .
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23
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Xu X, Wan T, Xin H, Li D, Pan H, Wu J, Ping Y. Delivery of CRISPR/Cas9 for therapeutic genome editing. J Gene Med 2019; 21:e3107. [PMID: 31237055 DOI: 10.1002/jgm.3107] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 05/25/2019] [Accepted: 06/11/2019] [Indexed: 12/15/2022] Open
Abstract
The clustered, regularly-interspaced, short palindromic repeat (CRISPR)-associated nuclease 9 (CRISPR/Cas9) is emerging as a promising genome-editing tool for treating diseases in a precise way, and has been applied to a wide range of research in the areas of biology, genetics, and medicine. Delivery of therapeutic genome-editing agents provides a promising platform for the treatment of genetic disorders. Although viral vectors are widely used to deliver CRISPR/Cas9 elements with high efficiency, they suffer from several drawbacks, such as mutagenesis, immunogenicity, and off-target effects. Recently, non-viral vectors have emerged as another class of delivery carriers in terms of their safety, simplicity, and flexibility. In this review, we discuss the modes of CRISPR/Cas9 delivery, the barriers to the delivery process and the application of CRISPR/Cas9 system for the treatment of genetic disorders. We also highlight several representative types of non-viral vectors, including polymers, liposomes, cell-penetrating peptides, and other synthetic vectors, for the therapeutic delivery of CRISPR/Cas9 system. The applications of CRISPR/Cas9 in treating genetic disorders mediated by the non-viral vectors are also discussed.
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Affiliation(s)
- Xiaojie Xu
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Tao Wan
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Huhu Xin
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Da Li
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310016, China
| | - Hongming Pan
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310016, China
| | - Jun Wu
- School of Biomedical Engineering, Sun Yat-sen University, Guangzhou, 510006, China
| | - Yuan Ping
- College of Pharmaceutical Sciences, Zhejiang University, 866 Yuhangtang Road, Hangzhou, 310058, China
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24
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Kannan R, Prabakaran P, Basu R, Pindi C, Senapati S, Muthuvijayan V, Prasad E. Mechanistic Study on the Antibacterial Activity of Self-Assembled Poly(aryl ether)-Based Amphiphilic Dendrimers. ACS APPLIED BIO MATERIALS 2019; 2:3212-3224. [DOI: 10.1021/acsabm.9b00140] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Ramya Kannan
- Department of Chemistry, Indian Institute of Technology Madras (IIT M), Chennai 600036, India
- Department of Biotechnology, Bhupat And Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras (IIT M), Chennai 600036, India
| | - Palani Prabakaran
- Department of Chemistry, Indian Institute of Technology Madras (IIT M), Chennai 600036, India
| | - Ruchira Basu
- Department of Chemistry, Indian Institute of Technology Madras (IIT M), Chennai 600036, India
| | - Chinmai Pindi
- Department of Biotechnology, Bhupat And Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras (IIT M), Chennai 600036, India
| | - Sanjib Senapati
- Department of Biotechnology, Bhupat And Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras (IIT M), Chennai 600036, India
| | - Vignesh Muthuvijayan
- Department of Biotechnology, Bhupat And Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras (IIT M), Chennai 600036, India
| | - Edamana Prasad
- Department of Chemistry, Indian Institute of Technology Madras (IIT M), Chennai 600036, India
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25
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Venkataraman S, Tan JPK, Chong ST, Chu CYH, Wilianto EA, Cheng CX, Yang YY. Identification of Structural Attributes Contributing to the Potency and Selectivity of Antimicrobial Polyionenes: Amides Are Better Than Esters. Biomacromolecules 2019; 20:2737-2742. [DOI: 10.1021/acs.biomac.9b00489] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shrinivas Venkataraman
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
| | - Jeremy P. K. Tan
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
| | - Shu Ting Chong
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
| | - Cassandra Y. H. Chu
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
| | - Eunice A. Wilianto
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
| | - Colin Xinru Cheng
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
| | - Yi Yan Yang
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore
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26
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Zhou Z, Ergene C, Palermo EF. Synthetic mimics of cyclic antimicrobial peptides via templated ring-opening metathesis (TROM). Polym Chem 2019. [DOI: 10.1039/c9py01271k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We utilized a templated ring-opening metathesis (TROM) strategy to synthesize a series of precision macrocyclic olefins, each containing two, three or four repeating units of a cyclooctene with pendant carboxylic acid side chains.
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Affiliation(s)
- Zhe Zhou
- Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
| | - Cansu Ergene
- Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
| | - Edmund F. Palermo
- Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
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27
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Electrospun Nanomaterials Implementing Antibacterial Inorganic Nanophases. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8091643] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Electrospinning is a versatile, simple, and low cost process for the controlled production of fibers. In recent years, its application to the development of multifunctional materials has encountered increasing success. In this paper, we briefly overview the general aspects of electrospinning and then we focus on the implementation of inorganic nanoantimicrobials, e.g., nanosized antimicrobial agents in electrospun fibers. The most relevant characteristics sought in nanoantimicrobials supported on (or dispersed into) polymeric materials are concisely discussed as well. The interesting literature issued in the last decade in the field of antimicrobial electrospun nanomaterials is critically described. A classification of the most relevant studies as a function of the different approaches chosen for incorporating nanoantimicrobials in the final material is also provided.
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28
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Qian Y, Qi F, Chen Q, Zhang Q, Qiao Z, Zhang S, Wei T, Yu Q, Yu S, Mao Z, Gao C, Ding Y, Cheng Y, Jin C, Xie H, Liu R. Surface Modified with a Host Defense Peptide-Mimicking β-Peptide Polymer Kills Bacteria on Contact with High Efficacy. ACS APPLIED MATERIALS & INTERFACES 2018; 10:15395-15400. [PMID: 29688003 DOI: 10.1021/acsami.8b01117] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) has been one of the major nosocomial pathogens to cause frequent and serious infections that are associated with various biomedical surfaces. This study demonstrated that surface modified with host defense peptide-mimicking β-peptide polymer, has surprisingly high bactericidal activities against Escherichia coli ( E. coli) and MRSA. As surface-tethered β-peptide polymers cannot move freely to adopt the collaborative interactions with bacterial membrane and are too short to penetrate the cell envelop, we proposed a mode of action by diffusing away the cell membrane-stabilizing divalent ions, Ca2+ and Mg2+. This hypothesis was supported by our study that Ca2+ and Mg2+ supplementation in the assay medium causes up to 80% loss of bacterial killing efficacy and that the addition of divalent ion chelating ethylenediaminetetraacetic acid into the above assay medium leads to significant recovery of the bacterial killing efficacy. In addition to its potent bacterial killing efficacy, the surface-tethered β-peptide polymer also demonstrated excellent biocompatibility by displaying no hemolysis and supporting mammalian cell adhesion and growth. In conclusion, this study demonstrated the potential of β-peptide polymer-modified surface in addressing nosocomial infections that are associated with various surfaces in biomedical applications.
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Affiliation(s)
| | | | | | | | | | | | - Ting Wei
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , China
| | - Qian Yu
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , China
| | - Shan Yu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Zhengwei Mao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Changyou Gao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China
| | | | - Yanyong Cheng
- Department of Anesthesiology , Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine , Shanghai 200011 , China
| | - Chenyu Jin
- Department of Anesthesiology , Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine , Shanghai 200011 , China
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29
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Dey P, Mukherjee S, Das G, Ramesh A. Micellar chemotherapeutic platform based on a bifunctional salicaldehyde amphiphile delivers a "combo-effect" for heightened killing of MRSA. J Mater Chem B 2018; 6:2116-2125. [PMID: 32254434 DOI: 10.1039/c7tb03150e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The devastating infections caused by methicillin-resistant Staphylococcus aureus (MRSA) coupled with its high resistance towards antibiotics underscores the need for an effective anti-MRSA therapeutic. The present study illustrates the use of a salicylaldehyde based bactericidal amphiphile (C1) in generating a micellar carrier that renders delivery of therapeutic antibiotics. The inherent membrane-targeting activity of C1 present in the micelle could be leveraged to counter the resistance of MRSA and enhance cellular uptake of the released antibiotics, resulting in effective elimination of the pathogen. The inherent bactericidal and antibiofilm activity of C1 was captured in FESEM analysis, solution-based assays and fluorescence microscopy. ANS-based fluorescence spectroscopy indicated that the critical micelle concentration (CMC) for C1 was 18.5 μM in water. DLS studies and FESEM analysis indicated that the average particle size for micelles based on C1 (C1M) and rifampicin-loaded C1M (C1M- R) was smaller than vancomycin-loaded C1M (C1M- V). C1M- R and C1M- V rendered sustained release of the antibiotics in physiologically relevant fluids. Notably, following interaction with MRSA for 3 h, the relative anti-MRSA activity of C1M- R and C1M- V was nearly 12-fold and 8-fold higher, respectively, as compared to the free antibiotics at equivalent concentration, highlighting the merit of leveraging the activity of C1 and the antibiotic concurrently in the micellar system. The relative cell-free antibiotic was also manifold lower in the case of C1M- R and C1M- V treated MRSA as against treatment with free antibiotics, suggesting that the amphiphilic warhead breached the membrane barrier and enhanced cellular uptake of the released antibiotics. Interestingly, C1M- R and C1M- V exhibited a high therapeutic index, being non-toxic to HEK 293 cells at concentrations higher than their minimum inhibitory concentration (MIC) against MRSA and they could be employed as an antibacterial coating to prevent MRSA biofilm formation on surgical silk sutures. The antibiotic-replete biocompatible micelles based on a self-assembling membrane-targeting amphiphile described herein represent a promising framework to integrate multiple warheads and generate a potent anti-MRSA therapeutic material.
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Affiliation(s)
- Poulomi Dey
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
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30
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Lin J, Chen X, Chen C, Hu J, Zhou C, Cai X, Wang W, Zheng C, Zhang P, Cheng J, Guo Z, Liu H. Durably Antibacterial and Bacterially Antiadhesive Cotton Fabrics Coated by Cationic Fluorinated Polymers. ACS APPLIED MATERIALS & INTERFACES 2018; 10:6124-6136. [PMID: 29356496 DOI: 10.1021/acsami.7b16235] [Citation(s) in RCA: 187] [Impact Index Per Article: 31.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Considerable attention has been devoted to producing antibacterial fabrics due to their very wide applications in medicine, hygiene, hospital, etc. However, the poor antibacterial durability and bad bacterial antiadhesion capacity of most existing antibacterial fabrics limit their applications. In this work, a series of antibacterial and polymeric quaternary ammonium monomers with different alkyl chain length were successfully synthesized to copolymerize with fluorine-containing and other acrylic monomers to generate cationic fluorinated polymer emulsions and durably antibacterial and bacterially antiadhesive cotton fabrics. The relation between antibacterial constituent and its antibacterial activity was investigated. The study indicated that the alkyl chain length and contents of the antibacterial monomers, as well as the add-on percentage of polymer greatly influenced the antibacterial activities of the fabrics. In addition, it was found that incorporation of fluorine component into the polymer greatly enhanced the antibacterial activity and bacterial antiadhesion of the treated fabrics due to the low surface energy induced hydrophobicity. Finally, antibacterial and antiadhesive models of action of the obtained fabrics were illustrated.
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Affiliation(s)
- Jing Lin
- School of Chemistry and Chemical Engineering, Guangzhou University , Guangzhou 510006, P. R. China
| | - XiaoYu Chen
- School of Chemistry and Chemical Engineering, Guangzhou University , Guangzhou 510006, P. R. China
| | - ChunYan Chen
- School of Chemistry and Chemical Engineering, Guangzhou University , Guangzhou 510006, P. R. China
| | - JieTao Hu
- School of Chemistry and Chemical Engineering, Guangzhou University , Guangzhou 510006, P. R. China
| | - CaiLong Zhou
- School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou 510640, P. R. China
| | - XianFang Cai
- School of Chemistry and Chemical Engineering, Guangzhou University , Guangzhou 510006, P. R. China
| | - Wei Wang
- School of Chemistry and Chemical Engineering, Guangzhou University , Guangzhou 510006, P. R. China
| | - Cheng Zheng
- School of Chemistry and Chemical Engineering, Guangzhou University , Guangzhou 510006, P. R. China
| | - PeiPei Zhang
- Department of Bioengineering, University of Maryland at College Park , College Park, Maryland 20742, United States
| | - Jiang Cheng
- School of Chemistry and Chemical Engineering, South China University of Technology , Guangzhou 510640, P. R. China
| | - ZhanHu Guo
- Integrated Composites Laboratory (ICL), Department of Chemical and Biomolecular Engineering, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - Hu Liu
- National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University , Zhengzhou, Henan 450002, P. R. China
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31
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Aggregation of Cationic Amphiphilic Block and Random Copoly(vinyl ether)s with Antimicrobial Activity. Polymers (Basel) 2018; 10:polym10010093. [PMID: 30966128 PMCID: PMC6414987 DOI: 10.3390/polym10010093] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 01/14/2018] [Accepted: 01/16/2018] [Indexed: 01/01/2023] Open
Abstract
In this study, we investigated the aggregation behaviors of amphiphilic poly(vinyl ether)s with antimicrobial activity. We synthesized a di-block poly(vinyl ether), B3826, composed of cationic primary amine and hydrophobic isobutyl (iBu) side chains, which previously showed antimicrobial activity against Escherichia coli. B3826 showed similar uptake behaviors as those for a hydrophobic fluorescent dye, 1,6-diphenyl-1,3,5-hexatriene, to counterpart polymers including homopolymer H44 and random copolymer R4025, indicating that the iBu block does not form strong hydrophobic domains. The cryo-TEM observations also indicated that the polymer aggregate of B3826 appears to have low-density polymer chains without any defined microscopic structures. We speculate that B3826 formed large aggregates by liquid-liquid separation due to the weak association of polymer chains. The fluorescence microscopy images showed that B3826 bonds to E. coli cell surfaces, and these bacterial cells were stained by propidium iodide, indicating that the cell membranes were significantly damaged. The results suggest that block copolymers may provide a new platform to design and develop antimicrobial materials that can utilize assembled structures and properties.
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32
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Ergene C, Yasuhara K, Palermo EF. Biomimetic antimicrobial polymers: recent advances in molecular design. Polym Chem 2018. [DOI: 10.1039/c8py00012c] [Citation(s) in RCA: 179] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The increasing prevalence of antibiotic-resistant bacterial infections, coupled with the decline in the number of new antibiotic drug approvals, has created a therapeutic gap that portends an emergent public health crisis.
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Affiliation(s)
- Cansu Ergene
- Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
| | - Kazuma Yasuhara
- Graduate School of Materials Science
- Nara Institute for Science and Technology
- Ikoma
- Japan
| | - Edmund F. Palermo
- Materials Science and Engineering
- Rensselaer Polytechnic Institute
- Troy
- USA
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33
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Ahmadi Z, Verma G, Jha D, Gautam HK, Kumar P. Evaluation of antimicrobial activity and cytotoxicity of pegylated aminoglycosides. J BIOACT COMPAT POL 2017. [DOI: 10.1177/0883911517739318] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Zeba Ahmadi
- Nucleic Acids Research Laboratory, CSIR-Institute of Genomics and Integrative Biology, Delhi, India
| | - Geeta Verma
- Nucleic Acids Research Laboratory, CSIR-Institute of Genomics and Integrative Biology, Delhi, India
| | - Diksha Jha
- Microbial Technology Laboratory, CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
| | - Hemant Kumar Gautam
- Microbial Technology Laboratory, CSIR-Institute of Genomics and Integrative Biology, New Delhi, India
| | - Pradeep Kumar
- Nucleic Acids Research Laboratory, CSIR-Institute of Genomics and Integrative Biology, Delhi, India
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34
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35
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A Cationic Polymer That Shows High Antifungal Activity against Diverse Human Pathogens. Antimicrob Agents Chemother 2017; 61:AAC.00204-17. [PMID: 28739790 DOI: 10.1128/aac.00204-17] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 07/18/2017] [Indexed: 12/19/2022] Open
Abstract
Invasive fungal diseases are generally difficult to treat and often fatal. The therapeutic agents available to treat fungi are limited, and there is a critical need for new agents to combat these deadly infections. Antifungal compound development has been hindered by the challenge of creating agents that are highly active against fungal pathogens but not toxic to the host. Host defense peptides (HDPs) are produced by eukaryotes as a component of the innate immune response to pathogens and have served as inspiration for the development of many new antibacterial compounds. HDP mimics, however, have largely failed to exhibit potent and selective antifungal activity. Here, we present an HDP-like nylon-3 copolymer that is effective against diverse fungi while displaying only mild to moderate toxicity toward mammalian cells. This polymer is active on its own and in synergy with existing antifungal drugs against multiple species of Candida and Cryptococcus, reaching levels of efficacy comparable to those of the clinical agents amphotericin B and fluconazole in some cases. In addition, the polymer acts synergistically with azoles against different species of Aspergillus, including some azole-resistant strains. These findings indicate that nylon-3 polymers are a promising lead for development of new antifungal therapeutic strategies.
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36
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Takahashi H, Caputo GA, Vemparala S, Kuroda K. Synthetic Random Copolymers as a Molecular Platform To Mimic Host-Defense Antimicrobial Peptides. Bioconjug Chem 2017; 28:1340-1350. [PMID: 28379682 DOI: 10.1021/acs.bioconjchem.7b00114] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Synthetic polymers have been used as a molecular platform to develop host-defense antimicrobial peptide (AMP) mimetics which are effective in killing drug-resistant bacteria. In this topical review, we will discuss the AMP-mimetic design and chemical optimization strategies as well as the biological and biophysical implications of AMP mimicry by synthetic polymers. Traditionally, synthetic polymers have been used as a chemical means to replicate the chemical functionalities and physicochemical properties of AMPs (e.g., cationic charge, hydrophobicity) to recapitulate their mode of action. However, we propose a new perception that AMP-mimetic polymers are an inherently bioactive platform as whole molecules, which mimic more than the side chain functionalities of AMPs. The tunable nature and chemical simplicity of synthetic random polymers facilitate the development of potent, cost-effective, broad-spectrum antimicrobials. The polymer-based approach offers the potential for many antimicrobial applications to be used directly in solution or attached to surfaces to fight against drug-resistant bacteria.
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Affiliation(s)
- Haruko Takahashi
- Center for International Research on Integrative Biomedical Systems, Institute of Industrial Science, The University of Tokyo , Tokyo, 153-8505, Japan
| | | | - Satyavani Vemparala
- The Institute of Mathematical Sciences , C.I.T. Campus, Taramani, Chennai, 600113, India
| | - Kenichi Kuroda
- Department of Biologic and Materials Sciences, School of Dentistry, University of Michigan , Ann Arbor, Michigan 48109, United States
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37
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Porel M, Thornlow DN, Artim CM, Alabi CA. Sequence-Defined Backbone Modifications Regulate Antibacterial Activity of OligoTEAs. ACS Chem Biol 2017; 12:715-723. [PMID: 28068062 DOI: 10.1021/acschembio.6b00837] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In response to the urgent need for new antibiotic development strategies, antimicrobial peptides (AMPs) and other synthetic polymers are being actively investigated as promising alternatives to traditional antibiotics. Although most AMPs display lytic activity against several types of bacteria, they have poor toxicology profiles and are susceptible to proteolysis in vivo. While many synthetic variants have been created to mimic AMPs by tuning the hydrophobic to cationic ratio of the side-chain groups, few have decoupled the effects of charge from hydrophobicity in discrete systems, and none have investigated the effect of backbone hydrophobicity. We recently developed a rapid and efficient approach for the assembly of synthetic sequence-defined oligothioetheramides (oligoTEAs) that are resistant to protease activity. Our oligoTEA assembly scheme allows direct access to the oligomer backbone, which enables precise tuning of oligoTEA hydrophobicity while keeping charge constant. In this study, we synthesized a new class of antibacterial oligoTEAs (AOTs) with precise control over backbone hydrophobicity and composition. Our studies suggest that AOTs lyse cells via membrane permeabilization and that hydrophobicity and macromolecular conformation are key properties that regulate AOT activity. Some of our AOTs show highly promising antibacterial activity (MIC ∼ 0.5-5 μM) against clinically relevant pathogens in the presence of serum, with little to no toxicity against RBCs and HEK293 cells. Taken together, our data identify design parameters and criteria that may be useful for assembling the next generation of potent and selective AOTs.
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Affiliation(s)
- Mintu Porel
- Robert
Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Dana N. Thornlow
- Robert
Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Christine M. Artim
- Robert
Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
| | - Christopher A. Alabi
- Robert
Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853, United States
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38
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Punia K, Punia A, Chatterjee K, Mukherjee S, Fata J, Banerjee P, Raja K, Yang NL. Rapid bactericidal activity of an amphiphilic polyacrylate terpolymer system comprised of same-centered comonomers with 2-carbon and 6-carbon spacer arms and an uncharged repeat unit. RSC Adv 2017. [DOI: 10.1039/c7ra00047b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Cationic amphiphilic polyacrylate terpolymers with rapid bactericidal activity against E. coli and S. aureus.
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Affiliation(s)
- Kamia Punia
- Ph.D. Program in Chemistry at the Graduate Center of the City University of New York
- New York
- USA
| | - Ashish Punia
- Ph.D. Program in Chemistry at the Graduate Center of the City University of New York
- New York
- USA
| | - Kaushiki Chatterjee
- Ph.D. Program in Biology at the Graduate Center of the City University of New York
- New York
- USA
| | - Sumit Mukherjee
- Ph.D. Program in Biochemistry at the Graduate Center of the City University of New York
- New York
- USA
| | - Jimmie Fata
- Ph.D. Program in Biology at the Graduate Center of the City University of New York
- New York
- USA
| | - Probal Banerjee
- Ph.D. Program in Biochemistry at the Graduate Center of the City University of New York
- New York
- USA
| | - Krishnaswami Raja
- Ph.D. Program in Chemistry at the Graduate Center of the City University of New York
- New York
- USA
| | - Nan-Loh Yang
- Ph.D. Program in Chemistry at the Graduate Center of the City University of New York
- New York
- USA
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39
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Li M, Cui F, Li Y, Tao Y, Wang X. Crystalline Regio-/Stereoregular Glycine-Bearing Polymers from ROMP: Effect of Microstructures on Materials Performances. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b02244] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Maosheng Li
- University of Chinese
Academy of Sciences, Beijing 100039, People’s Republic of China
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Uppu DSSM, Samaddar S, Hoque J, Konai MM, Krishnamoorthy P, Shome BR, Haldar J. Side Chain Degradable Cationic–Amphiphilic Polymers with Tunable Hydrophobicity Show in Vivo Activity. Biomacromolecules 2016; 17:3094-102. [DOI: 10.1021/acs.biomac.6b01057] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Divakara S. S. M. Uppu
- Chemical Biology & Medicinal Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur, Bangalore 560064, India
| | - Sandip Samaddar
- Chemical Biology & Medicinal Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur, Bangalore 560064, India
| | - Jiaul Hoque
- Chemical Biology & Medicinal Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur, Bangalore 560064, India
| | - Mohini M. Konai
- Chemical Biology & Medicinal Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur, Bangalore 560064, India
| | - Paramanandham Krishnamoorthy
- ICAR-National Institute of Veterinary Epidemiology and Disease Informatics (NIVEDI), Ramagondanahalli, Yelahanka, Bengaluru 560064, India
| | - Bibek R. Shome
- ICAR-National Institute of Veterinary Epidemiology and Disease Informatics (NIVEDI), Ramagondanahalli, Yelahanka, Bengaluru 560064, India
| | - Jayanta Haldar
- Chemical Biology & Medicinal Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur, Bangalore 560064, India
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42
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Parker K, Sampson NS. Precision Synthesis of Alternating Copolymers via Ring-Opening Polymerization of 1-Substituted Cyclobutenes. Acc Chem Res 2016; 49:408-17. [PMID: 26914522 PMCID: PMC4794705 DOI: 10.1021/acs.accounts.5b00490] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Indexed: 12/20/2022]
Abstract
Investigation of complex molecular systems depends on our ability to correlate physical measurements with molecular structure. Interpretation of studies that rely on synthetic polymers is generally limited by their heterogeneity; i.e., there is variation in the number and arrangement of the monomeric building blocks that have been incorporated. Superior physics and biology can be performed with materials and tools that exert precise control over the sequence and spacing of functional groups. An interest in functional ligands combined with a desire to control the orientation and stereochemistry of monomer incorporation led to the design of new substrates for ruthenium-catalyzed ring-opening metathesis polymerization (ROMP). We discovered that ROMP of cyclobutene-1-carboxamides provides uniform and translationally invariant polymers. In contrast, cyclobutene-1-carboxylate esters ring open upon treatment with ruthenium catalyst, but they are stable to homopolymerization. However, in the presence of cyclohexene monomers, they undergo alternating ROMP (AROMP or alt-ROMP) to give copolymers with a precisely controlled sequence. The alternating cyclobutene ester/cyclohexene pair provides access to functional group spacing larger than is possible with homopolymers. This can be desirable; for example, polymers with a regular 8-10 Å backbone spacing of cationic charge and with between four and eight cationic groups were the most effective antibacterial agents and had low cytotoxicity. Moreover, the AROMP chemistry allows alternation of two functional moieties: one associated with the cyclohexene and one attached to the cyclobutene. In the case of antibacterial copolymers, the alternating chemistry allowed variation of hydrophobicity via the cyclohexene while maintaining a constant cation spacing through the cyclobutene. In the case of copolymers that bear donor and acceptor groups, strict alternation of the groups increased intrachain charge transfer. Like cyclobutene-1-carboxylate esters, bicyclo[4.2.0]oct-7-ene-7-carboxylate esters ring open upon treatment with ruthenium catalyst and undergo ring opening cross-metathesis with cyclohexene to form alternating copolymers. The corresponding bicyclo[4.2.0]oct-7-ene-7-carboxyamides isomerize to the bicyclo[4.2.0]oct-1(8)-ene-8-carboxamides before they can ring open. However, the isomerized amides undergo ruthenium-catalyzed ring opening metathesis and rapidly AROMP with cyclohexene. Our alternating copolymer systems allow functionality to be placed along a polymer chain with larger than typical spacing. We have used both homopolymers and alternating copolymers for defining the functional group density required for targeting a cell surface and for the exploration of functional group positioning within a polymer chain. These polymer systems provide access to new materials with previously inaccessible types of nanoscale structures.
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Affiliation(s)
- Kathlyn
A. Parker
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
| | - Nicole S. Sampson
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
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43
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Uppu DSSM, Haldar J. Lipopolysaccharide Neutralization by Cationic-Amphiphilic Polymers through Pseudoaggregate Formation. Biomacromolecules 2016; 17:862-73. [DOI: 10.1021/acs.biomac.5b01567] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Divakara S. S. M. Uppu
- Chemical Biology & Medicinal Chemistry Laboratory, New Chemistry Unit (NCU), Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur, Bengaluru, Karnataka 560064, India
| | - Jayanta Haldar
- Chemical Biology & Medicinal Chemistry Laboratory, New Chemistry Unit (NCU), Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur, Bengaluru, Karnataka 560064, India
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44
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Süer NC, Demir C, Ünübol NA, Yalçın Ö, Kocagöz T, Eren T. Antimicrobial activities of phosphonium containing polynorbornenes. RSC Adv 2016. [DOI: 10.1039/c6ra15545f] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this study, amphiphilic polyoxanorbornene with different alkyl and aromatic phosphonium side chains was synthesized and investigated their biocidal properties.
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Affiliation(s)
- N. Ceren Süer
- Department of Chemistry
- Yildiz Technical University
- Esenler
- Turkey
| | - Ceren Demir
- Department of Chemistry
- Yildiz Technical University
- Esenler
- Turkey
| | - Nihan A. Ünübol
- Department of Medical Microbiology
- Acibadem University
- Atasehir
- Turkey
| | - Özlem Yalçın
- School of Medicine
- Koc University
- 34450 Sariyer
- Turkey
| | - Tanıl Kocagöz
- Department of Medical Microbiology
- Acibadem University
- Atasehir
- Turkey
| | - Tarik Eren
- Department of Chemistry
- Yildiz Technical University
- Esenler
- Turkey
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45
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Punia A, Lee K, He E, Mukherjee S, Mancuso A, Banerjee P, Yang NL. Effect of Relative Arrangement of Cationic and Lipophilic Moieties on Hemolytic and Antibacterial Activities of PEGylated Polyacrylates. Int J Mol Sci 2015; 16:23867-80. [PMID: 26473831 PMCID: PMC4632729 DOI: 10.3390/ijms161023867] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2015] [Revised: 09/28/2015] [Accepted: 09/29/2015] [Indexed: 11/16/2022] Open
Abstract
Synthetic amphiphilic polymers have been established as potentially efficient agents to combat widespread deadly infections involving antibiotic resistant superbugs. Incorporation of poly(ethylene glycol) (PEG) side chains into amphiphilic copolymers can reduce their hemolytic activity while maintaining high antibacterial activity. Our study found that the incorporation of PEG has substantially different effects on the hemolytic and antibacterial activities of copolymers depending on structural variations in the positions of cationic centers relative to hydrophobic groups. The PEG side chains dramatically reduced the hemolytic activities in copolymers with hydrophobic hexyl and cationic groups on the same repeating unit. However, in case of terpolymers with cationic and lipophilic groups placed on separate repeating units, the presence of PEG has significantly lower effect on hemolytic activities of these copolymers. PEGylated terpolymers displayed substantially lower activity against Staphylococcus aureus (S. aureus) than Escherichia coli (E. coli) suggesting the deterring effect of S. aureus' peptidoglycan cell wall against the penetration of PEGylated polymers. Time-kill studies confirmed the bactericidal activity of these copolymers and a 5 log reduction in E. coli colony forming units was observed within 2 h of polymer treatment.
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Affiliation(s)
- Ashish Punia
- Department of Chemistry and Center for Engineered Polymeric Materials, College of Staten Island, Staten Island, New York, NY 10016, USA.
- Ph. D. Program in Chemistry at the Graduate Center of the City University of New York, New York, NY 10016, USA.
| | - Kevin Lee
- Department of Chemistry, Macaulay Honors College, New York, NY 10016, USA.
| | - Edward He
- Department of Chemistry, Macaulay Honors College, New York, NY 10016, USA.
| | - Sumit Mukherjee
- Ph.D. Program in Biochemistry at the Graduate Center of the City University of New York, New York, NY 10016, USA.
| | - Andrew Mancuso
- Ph.D. Program in Biochemistry at the Graduate Center of the City University of New York, New York, NY 10016, USA.
| | - Probal Banerjee
- Department of Chemistry and Center for Developmental Neuroscience, College of Staten Island, Staten Island, New York, NY 10016, USA.
| | - Nan-Loh Yang
- Department of Chemistry and Center for Engineered Polymeric Materials, College of Staten Island, Staten Island, New York, NY 10016, USA.
- Ph. D. Program in Chemistry at the Graduate Center of the City University of New York, New York, NY 10016, USA.
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46
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Tan L, Li G, Parker KA, Sampson NS. Ru-Catalyzed Isomerization Provides Access to Alternating Copolymers via Ring-Opening Metathesis Polymerization. Macromolecules 2015; 48:4793-4800. [PMID: 26243969 PMCID: PMC4520717 DOI: 10.1021/acs.macromol.5b01058] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Revised: 06/24/2015] [Indexed: 01/29/2023]
Abstract
We describe an isomerization-alternating ROMP protocol that gives linear copolymers with rigorous sequence alternation. Bicyclo[4.2.0]oct-7-ene-7-carboxamides of primary amines are isomerized in the presence of (3-BrPyr)2Cl2(H2IMes)Ru=CHPh to the corresponding bicyclo[4.2.0]oct-1(8)-ene-8-carboxamides in which the olefinic bond is tetrasubstituted. The isomerized amides undergo alternating ring-opening metathesis polymerization with cyclohexene to provide soluble and linear copolymers with molecular weights up to ∼130 kDa. This process provides efficient entry to strictly alternating copolymers that can display diverse functional groups.
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Affiliation(s)
- Li Tan
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
| | - Guofang Li
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
| | - Kathlyn A. Parker
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
| | - Nicole S. Sampson
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States
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47
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Yao X, Du H, Xu N, Sun S, Zhu W, Shen Z. Fully degradable antibacterial poly(ester-phosphoester)s by ring-opening polymerization, “click” chemistry, and quaternization. J Appl Polym Sci 2015. [DOI: 10.1002/app.42647] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xuxia Yao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization; Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 People's Republic of China
| | - Hong Du
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization; Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 People's Republic of China
| | - Ning Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization; Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 People's Republic of China
| | - Shuai Sun
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization; Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 People's Republic of China
| | - Weipu Zhu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization; Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 People's Republic of China
| | - Zhiquan Shen
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization; Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 People's Republic of China
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48
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Paladini F, Pollini M, Sannino A, Ambrosio L. Metal-Based Antibacterial Substrates for Biomedical Applications. Biomacromolecules 2015; 16:1873-85. [PMID: 26082968 DOI: 10.1021/acs.biomac.5b00773] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The interest in nanotechnology and the growing concern for the antibiotic resistance demonstrated by many microorganisms have recently stimulated many efforts in designing innovative biomaterials and substrates with antibacterial properties. Among the implemented strategies to control the incidence of infections associated with the use of biomedical device and implants, interesting routes are represented by the incorporation of bactericidal agents onto the surface of biomaterials for the prevention of bacterial adhesion and biofilm growth. Natural products and particularly bioactive metals such as silver, copper and zinc represent an interesting alternative for the development of advanced biomaterials with antimicrobial properties. This review presents an overview of recent progress in the modification of biomaterials as well as the most attractive techniques for the deposition of antimicrobial coatings on different substrates for biomedical application. Moreover, some research activities and results achieved by the authors in the development of antibacterial materials are also presented and discussed.
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Affiliation(s)
- Federica Paladini
- †Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy
| | - Mauro Pollini
- †Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy
| | - Alessandro Sannino
- †Department of Engineering for Innovation, University of Salento, 73100 Lecce, Italy
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49
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50
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Liu R, Chen X, Falk SP, Masters KS, Weisblum B, Gellman SH. Nylon-3 polymers active against drug-resistant Candida albicans biofilms. J Am Chem Soc 2015; 137:2183-6. [PMID: 25650957 PMCID: PMC4682891 DOI: 10.1021/ja512567y] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Candida albicans is the most common fungal pathogen in humans, and most diseases produced by C. albicans are associated with biofilms. We previously developed nylon-3 polymers with potent activity against planktonic C. albicans and excellent C. albicans versus mammalian cell selectivity. Here we show that these nylon-3 polymers have strong and selective activity against drug-resistant C. albicans in biofilms, as manifested by inhibition of biofilm formation and by killing of C. albicans in mature biofilms. The best nylon-3 polymer (poly-βNM) is superior to the antifungal drug fluconazole for all three strains examined. This polymer is slightly less effective than amphotericin B (AmpB) for two strains, but the polymer is superior against an AmpB-resistant strain.
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Affiliation(s)
- Runhui Liu
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin, USA 53706
| | - Xinyu Chen
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin, USA 53706
| | - Shaun P. Falk
- Department of Medicine, University of Wisconsin, Madison, Wisconsin, USA 53706
| | - Kristyn S. Masters
- Department of Biomedical Engineering, University of Wisconsin, Madison, Wisconsin, USA 53706
| | - Bernard Weisblum
- Department of Medicine, University of Wisconsin, Madison, Wisconsin, USA 53706
| | - Samuel H. Gellman
- Department of Chemistry, University of Wisconsin, Madison, Wisconsin, USA 53706
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