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Zhang X, Liu P, Zhang R, Zheng W, Qin D, Liu Y, Wang X, Sun T, Gao Y, Li LL. Action Programmed Nanoantibiotics with pH-Induced Collapse and Negative-Charged-Surface-Induced Deformation against Antibiotic-Resistant Bacterial Peritonitis. Adv Healthc Mater 2024:e2401470. [PMID: 38924797 DOI: 10.1002/adhm.202401470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 06/19/2024] [Indexed: 06/28/2024]
Abstract
The incorporation of well-designed antibiotic nanocarriers, along with an antibiotic adjuvant effect, in combination with various antibiotics, offers an opportunity to combat drug-resistant strains. However, precise control over morphology and encapsulated payload release can significantly impact their antibacterial efficacy and synergistic effects when used alongside antibiotics. Here, this study focuses on developing lipopeptide-based nanoantibiotics, which demonstrate an antibiotic adjuvant effect by inducing pH-induced collapse and negative-charged-surface-induced deformation. This enhances the disruption of the bacterial outer membrane and facilitates drug penetration, effectively boosting the antimicrobial activity against drug-resistant strains. The modulation regulations of the lipopeptide nanocarriers with modular design are governed by the authors. The nanoantibiotics, made from lipopeptide and ciprofloxacin (Cip), have a drug loading efficiency of over 80%. The combination with Cip results in a significantly low fractional inhibitory concentration index of 0.375 and a remarkable reduction in the minimum inhibitory concentration of Cip against multidrug-resistant (MDR) Escherichia coli (clinical isolated strains) by up to 32-fold. The survival rate of MDR E. coli peritonitis treated with nanoantibiotics is significantly higher, reaching over 87%, compared to only 25% for Cip and no survival for the control group. Meanwhile, the nanoantibiotic shows no obvious toxicity to major organs.
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Affiliation(s)
- Xiao Zhang
- School of Pharmacy, Shandong Second Medical University, Weifang, Shandong, 261053, P. R. China
| | - Penghui Liu
- School of Bioscience and Technology, Shandong Second Medical University, Weifang, Shandong, 261053, P. R. China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), No. 11 Beiyitiao, Zhongguancun, Beijing, 100190, P. R. China
| | - Ran Zhang
- School of Pharmacy, Shandong Second Medical University, Weifang, Shandong, 261053, P. R. China
| | - Wenhong Zheng
- School of Bioscience and Technology, Shandong Second Medical University, Weifang, Shandong, 261053, P. R. China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), No. 11 Beiyitiao, Zhongguancun, Beijing, 100190, P. R. China
| | - Di Qin
- School of Bioscience and Technology, Shandong Second Medical University, Weifang, Shandong, 261053, P. R. China
| | - Yinghang Liu
- School of Pharmacy, Shandong Second Medical University, Weifang, Shandong, 261053, P. R. China
| | - Xin Wang
- School of Bioscience and Technology, Shandong Second Medical University, Weifang, Shandong, 261053, P. R. China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), No. 11 Beiyitiao, Zhongguancun, Beijing, 100190, P. R. China
| | - Tongyi Sun
- School of Bioscience and Technology, Shandong Second Medical University, Weifang, Shandong, 261053, P. R. China
| | - Yuanyuan Gao
- School of Pharmacy, Shandong Second Medical University, Weifang, Shandong, 261053, P. R. China
| | - Li-Li Li
- School of Bioscience and Technology, Shandong Second Medical University, Weifang, Shandong, 261053, P. R. China
- CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), No. 11 Beiyitiao, Zhongguancun, Beijing, 100190, P. R. China
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Zhang M, Yang B, Shi J, Wang Z, Liu Y. Host defense peptides mitigate the spread of antibiotic resistance in physiologically relevant condition. Antimicrob Agents Chemother 2024; 68:e0126123. [PMID: 38415983 PMCID: PMC10994823 DOI: 10.1128/aac.01261-23] [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: 09/30/2023] [Accepted: 02/06/2024] [Indexed: 02/29/2024] Open
Abstract
Antibiotic resistance represents a significant challenge to public health and human safety. The primary driver behind the dissemination of antibiotic resistance is the horizontal transfer of plasmids. Current conjugative transfer assay is generally performed in a standardized manner, ignoring the effect of the host environment. Host defense peptides (HDPs) possess a wide range of biological targets and play an essential role in the innate immune system. Herein, we reveal that sub-minimum inhibitory concentrations of HDPs facilitate the conjugative transfer of RP4-7 plasmid in the Luria Broth medium, and this observation is reversed in the RPMI medium, designed to simulate the host environment. Out of these HDPs, indolicidin (Ind), a cationic tridecapeptide from bovine neutrophils, significantly inhibits the conjugation of multidrug resistance plasmids in a dose-dependent manner, including blaNDM- and tet(X4)-bearing plasmids. We demonstrate that the addition of Ind to RPMI medium as the incubation substrate downregulates the expression of conjugation-related genes. In addition, Ind weakens the tricarboxylic acid cycle, impedes the electron transport chain, and disrupts the proton motive force, consequently diminishing the synthesis of adenosine triphosphate and limiting the energy supply. Our findings highlight the importance of the host-like environments for the development of horizontal transfer inhibitors and demonstrate the potential of HDPs in preventing the spread of resistance plasmids.
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Affiliation(s)
- Miao Zhang
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, China
| | - Bingqing Yang
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, China
| | - Jingru Shi
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, China
| | - Zhiqiang Wang
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, China
- Institute of Comparative Medicine, Yangzhou University, Yangzhou, China
| | - Yuan Liu
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, China
- Institute of Comparative Medicine, Yangzhou University, Yangzhou, China
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Vieira APGC, de Souza AN, Lima WG, Brito JCM, Simião DC, Gonçalves LVR, Cordeiro LPB, de Oliveira Scoaris D, Fernandes SOA, Resende JM, Bechinger B, Verly RM, de Lima ME. The Synthetic Peptide LyeTx I mn∆K, Derived from Lycosa erythrognatha Spider Toxin, Is Active against Methicillin-Resistant Staphylococcus aureus (MRSA) In Vitro and In Vivo. Antibiotics (Basel) 2024; 13:248. [PMID: 38534683 DOI: 10.3390/antibiotics13030248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Revised: 03/02/2024] [Accepted: 03/04/2024] [Indexed: 03/28/2024] Open
Abstract
The urgent global health challenge posed by methicillin-resistant Staphylococcus aureus (MRSA) infections demands effective solutions. Antimicrobial peptides (AMPs) represent promising tools of research of new antibacterial agents and LyeTx I mn∆K, a short synthetic peptide based on the Lycosa erythrognatha spider venom, is a good representative. This study focused on analyzing the antimicrobial activities of LyeTx I mn∆K, including minimum inhibitory and bactericidal concentrations, synergy and resensitization assays, lysis activity, the effect on biofilm, and the bacterial death curve in MRSA. Additionally, its characterization was conducted through isothermal titration calorimetry, dynamic light scattering, calcein release, and finally, efficacy in a mice wound model. The peptide demonstrates remarkable efficacy against planktonic cells (MIC 8-16 µM) and biofilms (>30% of inhibition) of MRSA, and outperforms vancomycin in terms of rapid bactericidal action and anti-biofilm effects. The mechanism involves significant membrane damage. Interactions with bacterial model membranes, including those with lysylphosphatidylglycerol (LysylPOPG) modifications, highlight the versatility and selectivity of this compound. Also, the peptide has the ability to sensitize resistant bacteria to conventional antibiotics, showing potential for combinatory therapy. Furthermore, using an in vivo model, this study showed that a formulated gel containing the peptide proved superior to vancomycin in treating MRSA-induced wounds in mice. Together, the results highlight LyeTx I mnΔK as a promising prototype for the development of effective therapeutic strategies against superficial MRSA infections.
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Affiliation(s)
- Ana Paula Gonçalves Coelho Vieira
- Faculdade de Saúde Santa Casa de Belo Horizonte, Programa de Pós-Graduação Stricto Sensu em Medicina e Biomedicina, Belo Horizonte 30150-240, Brazil
| | - Amanda Neves de Souza
- Departamento de Química, FACET, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)-Campus JK, Diamantina 39100-000, Brazil
- Institut de Chimie, Centre National de la Recherche Scientifique, UMR7177, Université de Strasbourg, 67070 Strasbourg, France
| | - William Gustavo Lima
- Faculdade de Saúde Santa Casa de Belo Horizonte, Programa de Pós-Graduação Stricto Sensu em Medicina e Biomedicina, Belo Horizonte 30150-240, Brazil
| | | | - Daniela Carolina Simião
- Laboratório de Radioisótopos, Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia-Campus Pampulha, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte 31270-901, Brazil
| | - Lucas Vinícius Ribeiro Gonçalves
- Faculdade de Saúde Santa Casa de Belo Horizonte, Programa de Pós-Graduação Stricto Sensu em Medicina e Biomedicina, Belo Horizonte 30150-240, Brazil
| | - Lídia Pereira Barbosa Cordeiro
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte 31270-901, Brazil
| | | | - Simone Odília Antunes Fernandes
- Laboratório de Radioisótopos, Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia-Campus Pampulha, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte 31270-901, Brazil
| | - Jarbas Magalhães Resende
- Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais (UFMG), Belo Horizonte 31270-901, Brazil
| | - Burkhard Bechinger
- Institut de Chimie, Centre National de la Recherche Scientifique, UMR7177, Université de Strasbourg, 67070 Strasbourg, France
- Institut Universitaire de France (IUF), 75005 Paris, France
| | - Rodrigo Moreira Verly
- Departamento de Química, FACET, Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM)-Campus JK, Diamantina 39100-000, Brazil
| | - Maria Elena de Lima
- Faculdade de Saúde Santa Casa de Belo Horizonte, Programa de Pós-Graduação Stricto Sensu em Medicina e Biomedicina, Belo Horizonte 30150-240, Brazil
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Truncated Pleurocidin Derivative with High Pepsin Hydrolysis Resistance to Combat Multidrug-Resistant Pathogens. Pharmaceutics 2022; 14:pharmaceutics14102025. [PMID: 36297458 PMCID: PMC9610943 DOI: 10.3390/pharmaceutics14102025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 09/13/2022] [Accepted: 09/20/2022] [Indexed: 11/29/2022] Open
Abstract
The global prevalence of antimicrobial resistance calls for the development of novel antimicrobial agents, particularly for these orally available drugs. Structural modifications of the natural antimicrobial peptides (AMPs) provide a straightforward approach to develop potent antimicrobial agents with high specificity and low toxicity. In this study, we truncated 11-amino-acids at the C-terminus of Pleurocidin, an AMP produced by Pleuronectes americanus, and obtained four peptide analogues termed GK-1, GK-2, GK-3 and GK-4. Minimum inhibitory concentration (MIC) tests showed that GK-1 obtained by direct truncation of Pleurocidin has no antibacterial activity, while GK-2, GK-3 and GK-4 show considerable antibacterial activity with Pleurocidin. Notably, GK-4 displays rapid bacteriostatic activity, great stability and low hemolysis, as well as enhanced hydrolytic resistance to pepsin treatment. Mechanistic studies showed that GK-4 induces membrane damage by interacting with bacterial membrane-specific components, dissipates bacterial membrane potential and promotes the generation of ROS. SEM and CD analysis further confirmed the ability of GK-4 to resist pepsin hydrolysis, which may be attributed to its stable helicity structure. Collectively, our findings reveal that GK-4 is a potential orally available candidate to treat infections caused by multidrug-resistant pathogens.
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Guo T, Sun X, Yang J, Yang L, Li M, Wang Y, Jiao H, Li G. Metformin reverse minocycline to inhibit minocycline-resistant Acinetobacter baumannii by destroy the outer membrane and enhance membrane potential in vitro. BMC Microbiol 2022; 22:215. [PMID: 36089583 PMCID: PMC9465895 DOI: 10.1186/s12866-022-02629-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 09/02/2022] [Indexed: 11/10/2022] Open
Abstract
Background Acinetobacter baumannii (A. baumannii) is an opportunistic pathogen and has emerged as one of the most troublesome pathogens. Drug resistance in A. baumannii has been reported on a global scale. Minocycline was found to be active against multi-drug resistant A. baumannii and was approved by the FDA for the infections caused by sensitive strains of A. baumannii. However, the emergence of minocycline resistance and its toxic effects still need to be addressed. Therefore, this study aimed to evaluate the synergistic effects of metformin combined with minocycline on minocycline-resistant A. baumannii. Results The effect of metformin on the antibacterial activity of minocycline was determined by checkerboard and time-killing assay. Further, it was observed by biofilm formation assay that metformin combination with minocycline can inhibit the formation of biofilm. Outer membrane integrity, membrane permeability, membrane potential and reactive oxygen species (ROS) were monitored to explore the underlying synergistic mechanisms of metformin on minocycline. And the results shown that metformin can destroy the outer membrane of A. baumannii, enhance its membrane potential, but does not affect the membrane permeability and ROS. Conclusion These findings suggested that the combination of metformin and minocycline has the potential for rejuvenating the activity of minocycline against minocycline-resistant A. baumannii.
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Shi J, Chen C, Wang D, Wang Z, Liu Y. The antimicrobial peptide LI14 combats multidrug-resistant bacterial infections. Commun Biol 2022; 5:926. [PMID: 36071151 PMCID: PMC9452538 DOI: 10.1038/s42003-022-03899-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 08/25/2022] [Indexed: 11/14/2022] Open
Abstract
The prevalence of multidrug-resistant (MDR) pathogens raises public fears of untreatable infections and represents a huge health risk. There is an urgent need to exploit novel antimicrobial agents. Due to the unique mechanisms, antimicrobial peptides (AMPs) with a low probability to achieve resistance are regarded as potential antibiotic alternatives to address this issue. Herein, we develop a panel of synthetic peptide compounds with novel structures based on the database filters technology (DFT), and the lead peptide LI14 shows potent antibacterial activity against all tested drug-resistant bacteria. LI14 exhibits rapid bactericidal activity and excellent anti-biofilm and -persisters activity, simultaneously showing a low propensity to induce resistance. Moreover, LI14 shows tolerance against pH, temperatures, and pepsin treatment, and no detectable toxicity both in vitro and in vivo. Mechanistic studies revealed that LI14 induces membrane damage by targeting bacterial-specific membrane components and dissipates the proton motive force (PMF), thereby resulting in metabolic perturbations and the accumulation of toxic metabolic products. Furthermore, LI14 sensitizes clinically relevant antibiotics against MDR bacteria. In animal models of infection, LI14 or combined with antibiotics are effective against drug-resistant pathogens. These findings suggest that LI14 is a promising antibiotic candidate to tackle MDR bacterial infections. A synthetic peptide LI14 demonstrates potent antibacterial activity against drug-resistant bacteria in vitro and in vivo by inducing membrane damage and disrupting membrane potential leading to metabolic perturbation.
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Affiliation(s)
- Jingru Shi
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China
| | - Chen Chen
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China
| | - Dejuan Wang
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China
| | - Zhiqiang Wang
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China. .,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009, China. .,Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, 225009, China.
| | - Yuan Liu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China. .,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009, China. .,Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, 225009, China. .,Institute of Comparative Medicine, Yangzhou University, Yangzhou, 225009, China.
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Zhang Y, Yu J, Zhang H, Li Y, Wang L. Nanofibrous dressing: Potential alternative for fighting against antibiotic‐resistance wound infections. J Appl Polym Sci 2022. [DOI: 10.1002/app.52178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yingjie Zhang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles Donghua University Shanghai China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology Donghua University Shanghai China
| | - Juan Yu
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles Donghua University Shanghai China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology Donghua University Shanghai China
| | - Huiru Zhang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles Donghua University Shanghai China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology Donghua University Shanghai China
| | - Yan Li
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles Donghua University Shanghai China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology Donghua University Shanghai China
| | - Lu Wang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles Donghua University Shanghai China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology Donghua University Shanghai China
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Liu Y, Tong Z, Shi J, Jia Y, Deng T, Wang Z. Reversion of antibiotic resistance in multidrug-resistant pathogens using non-antibiotic pharmaceutical benzydamine. Commun Biol 2021; 4:1328. [PMID: 34824393 PMCID: PMC8616900 DOI: 10.1038/s42003-021-02854-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 11/04/2021] [Indexed: 02/07/2023] Open
Abstract
Antimicrobial resistance has been a growing concern that gradually undermines our tradition treatment regimens. The fact that few antibacterial drugs with new scaffolds or targets have been approved in the past two decades aggravates this crisis. Repurposing drugs as potent antibiotic adjuvants offers a cost-effective strategy to mitigate the development of resistance and tackle the increasing infections by multidrug-resistant (MDR) bacteria. Herein, we found that benzydamine, a widely used non-steroidal anti-inflammatory drug in clinic, remarkably potentiated broad-spectrum antibiotic-tetracyclines activity against a panel of clinically important pathogens, including MRSA, VRE, MCRPEC and tet(X)-positive Gram-negative bacteria. Mechanistic studies showed that benzydamine dissipated membrane potential (▵Ψ) in both Gram-positive and Gram-negative bacteria, which in turn upregulated the transmembrane proton gradient (▵pH) and promoted the uptake of tetracyclines. Additionally, benzydamine exacerbated the oxidative stress by triggering the production of ROS and suppressing GAD system-mediated oxidative defensive. This mode of action explains the great bactericidal activity of the doxycycline-benzydamine combination against different metabolic states of bacteria involve persister cells. As a proof-of-concept, the in vivo efficacy of this drug combination was evidenced in multiple animal infection models. These findings indicate that benzydamine is a potential tetracyclines adjuvant to address life-threatening infections by MDR bacteria.
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Affiliation(s)
- Yuan Liu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China. .,Institute of Comparative Medicine, Yangzhou University, Yangzhou, 225009, China. .,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009, China. .,Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, 225009, China.
| | - Ziwen Tong
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China
| | - Jingru Shi
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China
| | - Yuqian Jia
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China
| | - Tian Deng
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China
| | - Zhiqiang Wang
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China. .,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou, 225009, China. .,Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, 225009, China.
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Shi J, Chen C, Wang D, Tong Z, Wang Z, Liu Y. Amphipathic Peptide Antibiotics with Potent Activity against Multidrug-Resistant Pathogens. Pharmaceutics 2021; 13:438. [PMID: 33804947 PMCID: PMC8063935 DOI: 10.3390/pharmaceutics13040438] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 03/15/2021] [Accepted: 03/20/2021] [Indexed: 11/16/2022] Open
Abstract
The emergence and prevalence of multidrug-resistant (MDR) bacteria have posed a serious threat to public health. Of particular concern are methicillin-resistant Staphylococcus aureus (MRSA) and blaNDM, mcr-1 and tet(X)-positive Gram-negative pathogens. The fact that few new antibiotics have been approved in recent years exacerbates this global crisis, thus, new alternatives are urgently needed. Antimicrobial peptides (AMPs) originated from host defense peptides with a wide range of sources and multiple functions, are less prone to achieve resistance. All these characteristics laid the foundation for AMPs to become potential antibiotic candidates. In this study, we revealed that peptide WW307 displayed potent antibacterial and bactericidal activity against MDR bacteria, including MRSA and Gram-negative bacteria carrying blaNDM-5, mcr-1 or tet(X4). In addition, WW307 exhibited great biofilm inhibition and eradication activity. Safety and stability experiments showed that WW307 had a strong resistance against various physiological conditions and displayed relatively low toxicity. Mechanistic experiments showed that WW307 resulted in membrane damage by selectively targeting bacterial membrane-specific components, including lipopolysaccharide (LPS), phosphatidylglycerol (PG), and cardiolipin (CL). Moreover, WW307 dissipated membrane potential and triggered the production of reactive oxygen species (ROS). Collectively, these results demonstrated that WW307 represents a promising candidate for combating MDR pathogens.
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Affiliation(s)
- Jingru Shi
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (J.S.); (C.C.); (D.W.); (Z.T.)
| | - Chen Chen
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (J.S.); (C.C.); (D.W.); (Z.T.)
| | - Dejuan Wang
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (J.S.); (C.C.); (D.W.); (Z.T.)
| | - Ziwen Tong
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (J.S.); (C.C.); (D.W.); (Z.T.)
| | - Zhiqiang Wang
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (J.S.); (C.C.); (D.W.); (Z.T.)
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
| | - Yuan Liu
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China; (J.S.); (C.C.); (D.W.); (Z.T.)
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou University, Yangzhou 225009, China
- Joint International Research Laboratory of Agriculture and Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou 225009, China
- Institute of Comparative Medicine, Yangzhou University, Yangzhou 225009, China
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Takahashi H, Caputo GA, Kuroda K. Amphiphilic polymer therapeutics: an alternative platform in the fight against antibiotic resistant bacteria. Biomater Sci 2021; 9:2758-2767. [DOI: 10.1039/d0bm01865a] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Amphiphilic antimicrobial polymers show promising potential as polymer therapeutics to fight drug resistant bacteria and biofilms.
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Affiliation(s)
- Haruko Takahashi
- Graduate School of Integrated Sciences for Life
- Hiroshima University
- Hiroshima 739-8526
- Japan
| | | | - Kenichi Kuroda
- Department of Biologic and Materials Sciences
- School of Dentistry
- University of Michigan
- Ann Arbor
- USA
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The Uniqueness of Tryptophan in Biology: Properties, Metabolism, Interactions and Localization in Proteins. Int J Mol Sci 2020; 21:ijms21228776. [PMID: 33233627 PMCID: PMC7699789 DOI: 10.3390/ijms21228776] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 11/16/2020] [Accepted: 11/17/2020] [Indexed: 12/14/2022] Open
Abstract
Tryptophan (Trp) holds a unique place in biology for a multitude of reasons. It is the largest of all twenty amino acids in the translational toolbox. Its side chain is indole, which is aromatic with a binuclear ring structure, whereas those of Phe, Tyr, and His are single-ring aromatics. In part due to these elaborate structural features, the biosynthetic pathway of Trp is the most complex and the most energy-consuming among all amino acids. Essential in the animal diet, Trp is also the least abundant amino acid in the cell, and one of the rarest in the proteome. In most eukaryotes, Trp is the only amino acid besides Met, which is coded for by a single codon, namely UGG. Due to the large and hydrophobic π-electron surface area, its aromatic side chain interacts with multiple other side chains in the protein, befitting its strategic locations in the protein structure. Finally, several Trp derivatives, namely tryptophylquinone, oxitriptan, serotonin, melatonin, and tryptophol, have specialized functions. Overall, Trp is a scarce and precious amino acid in the cell, such that nature uses it parsimoniously, for multiple but selective functions. Here, the various aspects of the uniqueness of Trp are presented in molecular terms.
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