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Petit M, Tessier J, Sahli C, Schmitzer AR. Confronting the Threat: Designing Highly Effective bis-Benzimidazolium Agents to Overcome Biofilm Persistence and Antimicrobial Resistance. ACS Infect Dis 2023; 9:2202-2214. [PMID: 37882623 DOI: 10.1021/acsinfecdis.3c00289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
The objective of this study is to take the initial steps toward developing novel antibiotics to counteract the escalating problem of antimicrobial and bacterial persistence, particularly in relation to biofilms. Our approach involves emulating the structural characteristics of cationic antimicrobial peptides. To circumvent resistance development, we have designed a library of bis-benzimidazolium salts that selectively target the microbial membranes in a nonspecific manner. To explore their structure-activity relationship, we conducted experiments using these compounds on various pathogens known for their resistance to conventional antibiotics, including Gram-positive methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant Enterococcus faecium (VRE), and Gram-negative Escherichia coli (E. coli). Notably, two bis-benzimidazolium salts exhibited robust antimicrobial activity while maintaining a high level of selectivity compared with mammalian cells. Our investigations revealed significant antibiofilm activity, as these compounds rapidly acted against established biofilms. In addition, bis-benzimidazolium compounds exhibited consistent results in resistance development and cross-resistance studies. Consequently, amphiphilic bis-benzimidazolium salts hold promise as potential candidates to combat resistance-associated infections.
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Affiliation(s)
- Maude Petit
- Département de Chimie, Faculté des Arts et des Sciences, Université de Montréal, Campus MIL, 1375, Ave. Thérèse Lavoie-Roux, Montréal, Québec H2 V 0B3, Canada
| | - Jérémie Tessier
- Département de Chimie, Faculté des Arts et des Sciences, Université de Montréal, Campus MIL, 1375, Ave. Thérèse Lavoie-Roux, Montréal, Québec H2 V 0B3, Canada
- Collège Bois-de-Boulogne, 10555 Ave. de Bois-de-Boulogne, Montréal H4N 1L4, Canada
| | - Célia Sahli
- Département de Chimie, Faculté des Arts et des Sciences, Université de Montréal, Campus MIL, 1375, Ave. Thérèse Lavoie-Roux, Montréal, Québec H2 V 0B3, Canada
- CNRS-UMR 7086, Interfaces, Traitements, Organisation et Dynamique des Systèmes (ITODYS), Université Paris Cité, Paris 75013 , France
| | - Andreea R Schmitzer
- Département de Chimie, Faculté des Arts et des Sciences, Université de Montréal, Campus MIL, 1375, Ave. Thérèse Lavoie-Roux, Montréal, Québec H2 V 0B3, Canada
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Pham TC, Hoang TTH, Tran DN, Kim G, Nguyen TV, Pham TV, Nandanwar S, Tran DL, Park M, Lee S. Imidazolium-Based Heavy-Atom-Free Photosensitizer for Nucleus-Targeted Fluorescence Bioimaging and Photodynamic Therapy. ACS APPLIED MATERIALS & INTERFACES 2023; 15:47969-47977. [PMID: 37812505 DOI: 10.1021/acsami.3c10200] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
The development of heavy-atom-free photosensitizers (PSs) for photodynamic therapy (PDT) has encountered significant challenges in achieving simultaneous high fluorescence emission and reactive oxygen species (ROS) generation. Moreover, the limited water solubility of these PSs imposes further limitations on their biomedical applications. To overcome these obstacles, this study presents a molecular design strategy employing hydrophilic heavy-atom-free PSs based on imidazolium salts. The photophysical properties of these PSs were comprehensively investigated through a combination of experimental and theoretical analyses. Notably, among the synthesized PSs, the ethylcarbazole-naphthoimidazolium (NI-Cz) conjugate exhibited efficient fluorescence emission (ΦF = 0.22) and generation of singlet oxygen (ΦΔ = 0.49), even in highly aqueous environments. The performance of NI-Cz was validated through its application in fluorescence bioimaging and PDT treatment in HeLa cells. Furthermore, NI-Cz holds promise for two-photon excitation and type I ROS generation, nucleus localization, and selective activity against Gram-positive bacteria, thereby expanding its scope for the design of heavy-atom-free PSs and phototheranostic applications.
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Affiliation(s)
- Thanh Chung Pham
- Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | | | - Dung Ngoc Tran
- Faculty of Chemistry, Hanoi National University of Education, Hanoi 100000, Vietnam
| | - Gun Kim
- Laboratory of Veterinary Pharmacology, College of Veterinary Science and Research Institute for Veterinary Science, Seoul National University, Seoul 08826, Korea
| | - Trang Van Nguyen
- Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Thong Van Pham
- R&D Center, Vietnam Education and Technology Transfer JSC, Cau Giay, Hanoi 100000, Vietnam
| | - Sondavid Nandanwar
- Eco-friendly New Materials Research Center, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon City 34141, Republic of Korea
| | - Dai Lam Tran
- Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 100000, Vietnam
| | - Myeongkee Park
- Department of Chemistry, Pukyong National University, Busan 48513, Korea
| | - Songyi Lee
- Department of Chemistry, Pukyong National University, Busan 48513, Korea
- Industry 4.0 Convergence Bionics Engineering, Pukyong National University, Busan 48513, Korea
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Hou Y, Tan T, Guo Z, Ji Y, Hu J, Zhang Y. Gram-selective antibacterial peptide hydrogels. Biomater Sci 2022; 10:3831-3844. [PMID: 35678287 DOI: 10.1039/d2bm00558a] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The human microbiome plays fundamental roles in human health and disease. However, widely used broad-spectrum antibiotics severely disrupt human-related microbial communities, eventually leading to resistant bacteria, posing a growing threat to global medical health. Antimicrobial peptides (AMPs) are promising antimicrobial agents that barely cause bacterial resistance. Excellent broad-spectrum antimicrobial activities have been achieved using hydrogels self-assembled from AMPs, but there is still a lack of AMP hydrogels that can target Gram-positive and Gram-negative bacteria. Herein, several hydrogels self-assembled from AMPs, termed IK1, IK3, and IK4, were designed and synthesized. In vitro antibacterial results indicated that the IK1 and IK4 hydrogels specifically targeted Gram-positive and Gram-negative bacteria, respectively, while the IK3 hydrogel targeted both Gram-positive and Gram-negative bacteria. The desired broad-spectrum or Gram-selective AMP hydrogels are believed to be obtained through the rational design of the hydrophilicity, hydrophobicity, and charge properties of the peptide molecules. Good in vivo Gram-selective antibacterial properties and the ability to promote wound healing have been demonstrated via treating mouse wound models with these AMP hydrogels. We believe that these Gram-selective AMP hydrogels could potentially have important applications in treating common recurring infections.
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Affiliation(s)
- Yangqian Hou
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China. .,Zhangjiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Tingyuan Tan
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China. .,Zhangjiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhen Guo
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China. .,Zhangjiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yuwen Ji
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China. .,Zhangjiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jun Hu
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China. .,Zhangjiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Yi Zhang
- Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China. .,Zhangjiang Lab, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
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Wan P, Wang Y, Guo W, Song Z, Zhang S, Wu H, Yan W, Deng M, Xiao C. Low-Molecular-Weight Polylysines with Excellent Antibacterial Properties and Low Hemolysis. ACS Biomater Sci Eng 2022; 8:903-911. [PMID: 35050580 DOI: 10.1021/acsbiomaterials.1c01527] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The steady development of bacterial resistance has become a global public health issue, and new antibacterial agents that are active against drug-resistant bacteria and less susceptible to bacterial resistance are urgently needed. Here, a series of low-molecular-weight cationic polylysines (Cx-PLLn) with different hydrophobic end groups (Cx) and degrees of polymerization (PLLn) was synthesized and used in antibacterial applications. All the obtained Cx-PLLn have antibacterial activity. Among them, C6-PLL13 displays the best antibacterial effect for Gram-positive bacteria, that is, Staphylococcus aureus (S. aureus) and methicillin-resistant Staphylococcus aureus (MRSA), and highest selectivity against Gram-positive bacteria. A mechanistic study revealed that the C6-PLL13 destroys the integrity of the bacterial cell membrane and causes effective bacterial death. Owing to this membrane-disrupting property, C6-PLL13 showed rapid bacterial killing kinetics and was not likely to develop resistance after repeat treatment (up to 13 generations). Moreover, C6-PLL13 demonstrated a significant therapeutic effect on an MRSA infection mouse model, which further proved that this synthetic polymer could be used as an effective weapon against bacterial infections.
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Affiliation(s)
- Pengqi Wan
- Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China.,Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
| | - Yongjie Wang
- Department of Spinal Surgery, The First Hospital of Jilin University, Changchun, Jilin 130022, China
| | - Wei Guo
- Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China.,Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China
| | - Zhengwei Song
- Ministry of Education, Key Laboratory of Green Preparation and Application for Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan, Hubei 430062, P. R. China
| | - Shaokun Zhang
- Department of Spinal Surgery, The First Hospital of Jilin University, Changchun, Jilin 130022, China
| | - Hong Wu
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, Jilin 130041, P. R. China
| | - Wei Yan
- Ministry of Education, Key Laboratory of Green Preparation and Application for Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan, Hubei 430062, P. R. China
| | - Mingxiao Deng
- Department of Chemistry, Northeast Normal University, Changchun, Jilin 130024, P. R. China
| | - Chunsheng Xiao
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China.,Jilin Biomedical Polymers Engineering Laboratory, Changchun, Jilin 130022, P. R. China
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