1
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Wu W, Song J, Li T, Li W, Wang J, Wang S, Dong N, Shan A. Unlocking Antibacterial Potential: Key-Site-Based Regulation of Antibacterial Spectrum of Peptides. J Med Chem 2024; 67:4131-4149. [PMID: 38420875 DOI: 10.1021/acs.jmedchem.3c02404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
In the pursuit of combating multidrug-resistant bacteria, antimicrobial peptides (AMPs) have emerged as promising agents; however, their application in clinical settings still presents challenges. Specifically, the exploration of crucial structural parameters that influence the antibacterial spectrum of AMPs and the subsequent development of tailored variants with either broad- or narrow-spectrum characteristics to address diverse clinical therapeutic needs has been overlooked. This study focused on investigating the effects of amino acid sites and hydrophobicity on the peptide's antibacterial spectrum through Ala scanning and fixed-point hydrophobic amino acid substitution techniques. The findings revealed that specific amino acid sites played a pivotal role in determining the antibacterial spectrum of AMPs and confirmed that broadening the spectrum could be achieved only by increasing hydrophobicity at certain positions. In conclusion, this research provided a theoretical basis for future precise regulation of an antimicrobial peptide's spectrum by emphasizing the intricate balance between amino acid sites and hydrophobicity.
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Affiliation(s)
- Wanpeng Wu
- Animal Science and Technology College, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Jing Song
- Animal Science and Technology College, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Tong Li
- Animal Science and Technology College, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Wenyu Li
- Animal Science and Technology College, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Jiajun Wang
- Animal Science and Technology College, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Shuo Wang
- Animal Science and Technology College, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Na Dong
- Animal Science and Technology College, Northeast Agricultural University, Harbin 150030, P. R. China
| | - Anshan Shan
- Animal Science and Technology College, Northeast Agricultural University, Harbin 150030, P. R. China
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2
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Tiwari K, Patel P, Mondal AH, Mukhopadhyay K. Interaction with lipopolysaccharide is key to efficacy of tryptophan- and arginine-rich α-melanocyte-stimulating hormone analogs against Gram-negative bacteria. Future Microbiol 2024; 19:195-211. [PMID: 38126934 DOI: 10.2217/fmb-2023-0080] [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] [Received: 04/06/2023] [Accepted: 10/20/2023] [Indexed: 12/23/2023] Open
Abstract
Aim: In order to search for novel antibacterial therapeutics against Gram-negative bacteria, the antibacterial efficacies and mechanism of action of tryptophan- and arginine-rich α-melanocyte-stimulating hormone analogs were investigated. Materials & methods: We performed a killing assay to determine their efficacy; fluorescence, microscopic studies were used to understand their mechanism and peptide-lipopolysaccharide interaction. A checkerboard assay was used to find the effective combination of peptide and antibiotics. Results: Ana-peptides displayed good killing activity against Escherichia coli, Klebsiella pneumoniae and Pseudomonas aeruginosa. Their strong interaction with lipopolysaccharide damaged the bacterial membranes and led to their subsequent death. Ana-5, the highest cationic and hydrophobic analog, emerged as the most potent peptide, showing synergistic action with rifampicin and erythromycin. Conclusion: Ana-5 can be presented as an important therapeutic candidate against bacterial infections.
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Affiliation(s)
- Kanchan Tiwari
- Antimicrobial Research Laboratory, School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Priya Patel
- Antimicrobial Research Laboratory, School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Aftab H Mondal
- Antimicrobial Research Laboratory, School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
| | - Kasturi Mukhopadhyay
- Antimicrobial Research Laboratory, School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, 110067, India
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3
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Jeon E, Kim MK, Park Y. Efficacy of the bee-venom antimicrobial peptide Osmin against sensitive and carbapenem-resistant Klebsiella pneumoniae strains. Int J Antimicrob Agents 2024; 63:107054. [PMID: 38072166 DOI: 10.1016/j.ijantimicag.2023.107054] [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] [Received: 07/20/2023] [Revised: 11/21/2023] [Accepted: 12/04/2023] [Indexed: 01/19/2024]
Abstract
The emergence of multidrug-resistant (MDR) Klebsiella pneumoniae strains causes severe problems in the treatment of bacterial infections owing to limited treatment options. Especially, carbapenem-resistant Klebsiella pneumoniae (CRKP) is rapidly spreading worldwide and is emerging as a new cause of drug-resistant healthcare-associated infections. CRKP also has been announced by the Centers for Disease Control and Prevention (CDC) and the World Health Organization (WHO) as one of the most pressing antibiotic resistance threats. Antimicrobial peptides (AMPs) are drawing considerable attention as ideal antibiotic alternative candidates to combat MDR bacterial infections. In a previous study, Osmin is composed of 17 amino acids and is isolated from solitary bee (Osmia rufa) venom. Herein, we evaluated the potential of Osmin to be used against drug-resistant K. pneumoniae as an alternative to conventional antibiotics. Osmin exhibited significant antimicrobial and anti-biofilm activity and lower toxicity than melittin, a well-known bee venom peptide. Additionally, we confirmed that it possesses a bactericidal mechanism that rapidly destroys bacterial membranes. Osmin was relatively more stable than melittin under the influence of various environmental factors and unlike conventional antibiotics, it exhibited a low bacterial resistance risk. During in vivo tests, Osmin reduced bacterial growth and the expression of pro-inflammatory cytokines and fibrosis-related genes in mice with CRKP-induced sepsis. Overall, our results indicate a high potential for Osmin to be used as a valuable therapeutic agent against drug-resistant K. pneumoniae infections.
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Affiliation(s)
- Eunyeong Jeon
- Department of Biomedical Sciences, Chosun University, Gwangju, Republic of Korea
| | - Min Kyung Kim
- Department of Biomedical Sciences, Chosun University, Gwangju, Republic of Korea
| | - Yoonkyung Park
- Department of Biomedical Sciences, Chosun University, Gwangju, Republic of Korea; Research Center for Proteineous Materials (RCPM), Chosun University, Gwangju, Republic of Korea.
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4
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Klubthawee N, Wongchai M, Aunpad R. The bactericidal and antibiofilm effects of a lysine-substituted hybrid peptide, CM-10K14K, on biofilm-forming Staphylococcus epidermidis. Sci Rep 2023; 13:22262. [PMID: 38097636 PMCID: PMC10721899 DOI: 10.1038/s41598-023-49302-y] [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: 06/27/2023] [Accepted: 12/06/2023] [Indexed: 12/17/2023] Open
Abstract
Staphylococci, notably biofilm-forming Staphylococcus epidermidis, have been recognized as global nosocomial pathogens in medical device-related infections. Their potential to attach to and form biofilm on indwelling catheters are significant factors impeding conventional treatment. Due to their extensive antimicrobial and antibiofilm actions, antimicrobial peptides (AMPs) have attracted interest as promising alternative compounds for curing difficult-to-treat, biofilm-forming bacterial infections. Cecropin A-melittin or CM, a well-known hybrid peptide, exhibits broad-spectrum antimicrobial activity, however it also possesses high toxicity. In the current study, a series of hybrid CM derivatives was designed using an amino acid substitution strategy to explore potential antibacterial and antibiofilm peptides with low toxicity. Among the derivatives, CM-10K14K showed the least hemolysis along with potent antibacterial activity against biofilm-forming S. epidermidis (MICs = 3.91 μg/mL) and rapid killing after 15 min exposure (MBCs = 7.81 μg/mL). It can prevent the formation of S. epidermidis biofilm and also exhibited a dose-dependent eradication activity on mature or established S. epidermidis biofilm. In addition, it decreased the development of biofilm by surviving bacteria, and formation of biofilm on the surface of CM-10K14K-impregnated catheters. Released CM-10K14K decreased planktonic bacterial growth and inhibited biofilm formation by S. epidermidis in a dose-dependent manner for 6 and 24 h post-exposure. Impregnation of CM-10K14K prevented bacterial attachment on catheters and thus decreased formation of extensive biofilms. SEM images supported the antibiofilm activity of CM-10K14K. Flow cytometry analysis and TEM images demonstrated a membrane-active mechanism of CM-10K14K, inducing depolarization and permeabilization, and subsequent membrane rupture leading to cell death. The presence of an interaction with bacterial DNA was verified by gel retardation assay. These antibacterial and antibiofilm activities of CM-10K14K suggest its potential application to urinary catheters for prevention of biofilm-forming colonization or for treatment of medical devices infected with S. epidermidis.
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Affiliation(s)
- Natthaporn Klubthawee
- Department of Medical Technology, Faculty of Allied Health Sciences, Thammasat University, Khlong Luang, 12120, Pathum Thani, Thailand
| | - Mathira Wongchai
- Graduate Program in Biomedical Sciences, Faculty of Allied Health Sciences, Thammasat University, Khlong Luang, 12120, Pathum Thani, Thailand
| | - Ratchaneewan Aunpad
- Graduate Program in Biomedical Sciences, Faculty of Allied Health Sciences, Thammasat University, Khlong Luang, 12120, Pathum Thani, Thailand.
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5
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Mondal A, Pandit S, Sahoo J, Subramaniam Y, De M. Post-functionalization of sulfur quantum dots and their aggregation-dependent antibacterial activity. NANOSCALE 2023; 15:18624-18638. [PMID: 37975185 DOI: 10.1039/d3nr04287a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
Sulfur quantum dots (SQDs) have emerged as an intriguing class of luminescent nanomaterial due to their exceptional physiochemical and optoelectronic properties. However, their biomedical application is still in its infancy due to the limited scope of their surface functionalization. Herein, we explored the surface functionalization of SQDs through different thiol ligands with tuneable functionality and tested their antibacterial efficacy. Notably, very high antibacterial activity of functionalized SQDs (10-25 ng ml-1) was noted, which is 105 times higher compared to that of nonfunctionalized SQDs. Moreover, a rare phenomenon of the reverse trend of antibacterial activity through surface modification was observed, with increasing surface hydrophobicity of various nanomaterials as the antibacterial activity increased. However, we also noted that as the surface hydrophobicity increased, the SQDs tended to exhibit a propensity for aggregation, which consequently decreased their antibacterial efficacy. This identical pattern was also evident in in vivo assessments. Overall, this study illuminates the importance of surface modifications of SQDs and the role of surface hydrophobicity in the development of antibacterial agents.
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Affiliation(s)
- Avijit Mondal
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India.
| | - Subrata Pandit
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India.
| | - Jagabandhu Sahoo
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India.
| | | | - Mrinmoy De
- Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India.
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6
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Lee PC, Yen CF, Lin CC, Lung FDT. Designing the antimicrobial peptide with centrosymmetric and amphipathic characterizations for improving antimicrobial activity. J Pept Sci 2023; 29:e3510. [PMID: 37151189 DOI: 10.1002/psc.3510] [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: 02/14/2023] [Revised: 04/08/2023] [Accepted: 05/02/2023] [Indexed: 05/09/2023]
Abstract
Antibiotic-resistant bacterial infections are becoming a serious health issue and will cause 10 million deaths per year by 2050. As a result, the development of new antimicrobial agents is urgently needed. Antimicrobial peptides (AMPs) are found in the innate immune systems of various organisms to effectively fend off invading pathogens. In this study, we designed a series of AMPs (THL-2-1 to THL-2-9) with centrosymmetric and amphipathic properties, through substituting different amino acids on the hydrophobic side and at the centrosymmetric position to improve their antimicrobial activity. The results showed that leucine as a residue on the hydrophobic side of the peptide could enhance its antimicrobial activity and that glutamic acid as a centrosymmetric residue could increase the salt resistance of the peptide. Thus, the THL-2-3 peptide (KRLLRELKRLL-NH2 ) showed the greatest antimicrobial activity (MIC90 of 16 μM) against Gram-negative bacteria and had the highest salt resistance and cell selectivity among all the designed peptides. In summary, the results of this study provide useful references for the design of AMPs to enhance antimicrobial activity.
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Affiliation(s)
- Ping-Chien Lee
- Department of Chemistry, Tunghai University, Taichung, Taiwan
| | - Chi-Fang Yen
- Department of Chemistry, Tunghai University, Taichung, Taiwan
| | - Ching-Chun Lin
- Department of Chemistry, Tunghai University, Taichung, Taiwan
| | - Feng-Di T Lung
- Department of Chemistry, Tunghai University, Taichung, Taiwan
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7
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Pedron CN, Torres MDT, Oliveira CS, Silva AF, Andrade GP, Wang Y, Pinhal MAS, Cerchiaro G, da Silva Junior PI, da Silva FD, Radhakrishnan R, de la Fuente-Nunez C, Oliveira Junior VX. Molecular hybridization strategy for tuning bioactive peptide function. Commun Biol 2023; 6:1067. [PMID: 37857855 PMCID: PMC10587126 DOI: 10.1038/s42003-023-05254-7] [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: 05/18/2022] [Accepted: 08/17/2023] [Indexed: 10/21/2023] Open
Abstract
The physicochemical and structural properties of antimicrobial peptides (AMPs) determine their mechanism of action and biological function. However, the development of AMPs as therapeutic drugs has been traditionally limited by their toxicity for human cells. Tuning the physicochemical properties of such molecules may abolish toxicity and yield synthetic molecules displaying optimal safety profiles and enhanced antimicrobial activity. Here, natural peptides were modified to improve their activity by the hybridization of sequences from two different active peptide sequences. Hybrid AMPs (hAMPs) were generated by combining the amphipathic faces of the highly toxic peptide VmCT1, derived from scorpion venom, with parts of four other naturally occurring peptides having high antimicrobial activity and low toxicity against human cells. This strategy led to the design of seven synthetic bioactive variants, all of which preserved their structure and presented increased antimicrobial activity (3.1-128 μmol L-1). Five of the peptides (three being hAMPs) presented high antiplasmodial at 0.8 μmol L-1, and virtually no undesired toxic effects against red blood cells. In sum, we demonstrate that peptide hybridization is an effective strategy for redirecting biological activity to generate novel bioactive molecules with desired properties.
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Affiliation(s)
- Cibele Nicolaski Pedron
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, 09210580, Brazil
- Departamento de Bioquímica, Universidade Federal de São Paulo, São Paulo, SP, 04044020, Brazil
| | - Marcelo Der Torossian Torres
- Machine Biology Group, Departments of Psychiatry and Microbiology, Institute for Biomedical Informatics, Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Departments of Bioengineering and Chemical and Biomolecular Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA
- Penn Institute for Computational Science, University of Pennsylvania, Philadelphia, PA, USA
| | - Cyntia Silva Oliveira
- Departamento de Bioquímica, Universidade Federal de São Paulo, São Paulo, SP, 04044020, Brazil
| | - Adriana Farias Silva
- Departamento de Biofísica, Universidade Federal de São Paulo, São Paulo, SP, 04044020, Brazil
| | - Gislaine Patricia Andrade
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, 09210580, Brazil
- Departamento de Biofísica, Universidade Federal de São Paulo, São Paulo, SP, 04044020, Brazil
| | - Yiming Wang
- Departments of Bioengineering and Chemical and Biomolecular Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA
- Penn Institute for Computational Science, University of Pennsylvania, Philadelphia, PA, USA
| | | | - Giselle Cerchiaro
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, 09210580, Brazil
| | | | - Fernanda Dias da Silva
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, 09210580, Brazil
| | - Ravi Radhakrishnan
- Departments of Bioengineering and Chemical and Biomolecular Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA
- Penn Institute for Computational Science, University of Pennsylvania, Philadelphia, PA, USA
| | - Cesar de la Fuente-Nunez
- Machine Biology Group, Departments of Psychiatry and Microbiology, Institute for Biomedical Informatics, Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
- Departments of Bioengineering and Chemical and Biomolecular Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA, USA.
- Penn Institute for Computational Science, University of Pennsylvania, Philadelphia, PA, USA.
| | - Vani Xavier Oliveira Junior
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP, 09210580, Brazil.
- Departamento de Bioquímica, Universidade Federal de São Paulo, São Paulo, SP, 04044020, Brazil.
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8
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Chen C, Cai J, Shi J, Wang Z, Liu Y. Resensitizing multidrug-resistant Gram-negative bacteria to carbapenems and colistin using disulfiram. Commun Biol 2023; 6:810. [PMID: 37537267 PMCID: PMC10400630 DOI: 10.1038/s42003-023-05173-7] [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: 03/13/2023] [Accepted: 07/24/2023] [Indexed: 08/05/2023] Open
Abstract
The increasing incidence of bacterial infections caused by multidrug-resistant (MDR) Gram-negative bacteria has deepened the need for new effective treatments. Antibiotic adjuvant strategy is a more effective and economical approach to expand the lifespan of currently used antibiotics. Herein, we uncover that alcohol-abuse drug disulfiram (DSF) and derivatives thereof are potent antibiotic adjuvants, which dramatically potentiate the antibacterial activity of carbapenems and colistin against New Delhi metallo-β-lactamase (NDM)- and mobilized colistin resistance (MCR)-expressing Gram-negative pathogens, respectively. Mechanistic studies indicate that DSF improves meropenem efficacy by specifically inhibiting NDM activity. Moreover, the robust potentiation of DSF to colistin is due to its ability to exacerbate the membrane-damaging effects of colistin and disrupt bacterial metabolism. Notably, the passage and conjugation assays reveal that DSF minimizes the evolution and spread of meropenem and colistin resistance in clinical pathogens. Finally, their synergistic efficacy in animal models was evaluated and DSF-colistin/meropenem combination could effectively treat MDR bacterial infections in vivo. Taken together, our works demonstrate that DSF and its derivatives are versatile and potent colistin and carbapenems adjuvants, opening a new horizon for the treatment of difficult-to-treat infections.
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Affiliation(s)
- Chen Chen
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, China
| | - Jinju Cai
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009, 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, 225009, 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, 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
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, College of Veterinary Medicine, 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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9
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Kim M, Cheon Y, Shin D, Choi J, Nielsen JE, Jeong MS, Nam HY, Kim S, Lund R, Jenssen H, Barron AE, Lee S, Seo J. Real-Time Monitoring of Multitarget Antimicrobial Mechanisms of Peptoids Using Label-Free Imaging with Optical Diffraction Tomography. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2302483. [PMID: 37341246 PMCID: PMC10460844 DOI: 10.1002/advs.202302483] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Indexed: 06/22/2023]
Abstract
Antimicrobial peptides (AMPs) are promising therapeutics in the fight against multidrug-resistant bacteria. As a mimic of AMPs, peptoids with N-substituted glycine backbone have been utilized for antimicrobials with resistance against proteolytic degradation. Antimicrobial peptoids are known to kill bacteria by membrane disruption; however, the nonspecific aggregation of intracellular contents is also suggested as an important bactericidal mechanism. Here,structure-activity relationship (SAR) of a library of indole side chain-containing peptoids resulting in peptoid 29 as a hit compound is investigated. Then, quantitative morphological analyses of live bacteria treated with AMPs and peptoid 29 in a label-free manner using optical diffraction tomography (ODT) are performed. It is unambiguously demonstrated that both membrane disruption and intracellular biomass flocculation are primary mechanisms of bacterial killing by monitoring real-time morphological changes of bacteria. These multitarget mechanisms and rapid action can be a merit for the discovery of a resistance-breaking novel antibiotic drug.
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Affiliation(s)
- Minsang Kim
- Department of ChemistryGwangju Institute of Science and Technology (GIST)123, Cheomdangwagi‐ro, Buk‐guGwangju61005Republic of Korea
| | - Yeongmi Cheon
- Gwangju CenterKorea Basic Science Institute (KBSI)49, Dosicheomdansaneop‐ro, Nam‐guGwangju61751Republic of Korea
- Laboratory of Molecular BiochemistryChonnam National University77, Yongbong‐ro, Buk‐guGwangju61186Republic of Korea
- Department of Microbiology and Molecular BiologyChungnam National University99, Daehak‐ro, Yuseong‐guDaejeon34134Republic of Korea
| | - Dongmin Shin
- Department of ChemistryGwangju Institute of Science and Technology (GIST)123, Cheomdangwagi‐ro, Buk‐guGwangju61005Republic of Korea
| | - Jieun Choi
- Department of ChemistryGwangju Institute of Science and Technology (GIST)123, Cheomdangwagi‐ro, Buk‐guGwangju61005Republic of Korea
| | - Josefine Eilsø Nielsen
- Department of Science and EnvironmentRoskilde UniversityUniversitetsvej 1Roskilde4000Denmark
- Department of Bioengineering, Schools of Medicine and EngineeringStanford University443 Via OrtegaStanfordCalifornia94305United States
| | - Myeong Seon Jeong
- Chuncheon CenterKorea Basic Science Institute (KBSI)1, Kangwondaehak‐gil, Chuncheon‐siGangwon‐do24341Republic of Korea
| | - Ho Yeon Nam
- Department of ChemistryGwangju Institute of Science and Technology (GIST)123, Cheomdangwagi‐ro, Buk‐guGwangju61005Republic of Korea
| | - Sung‐Hak Kim
- Laboratory of Molecular BiochemistryChonnam National University77, Yongbong‐ro, Buk‐guGwangju61186Republic of Korea
| | - Reidar Lund
- Department of ChemistryUniversity of OsloProblemveien 7Oslo0315Norway
| | - Håvard Jenssen
- Department of Science and EnvironmentRoskilde UniversityUniversitetsvej 1Roskilde4000Denmark
| | - Annelise E. Barron
- Department of Bioengineering, Schools of Medicine and EngineeringStanford University443 Via OrtegaStanfordCalifornia94305United States
| | - Seongsoo Lee
- Gwangju CenterKorea Basic Science Institute (KBSI)49, Dosicheomdansaneop‐ro, Nam‐guGwangju61751Republic of Korea
- Department of Systems BiotechnologyChung‐Ang UniversityAnseong‐siGyeonggi‐do17546Republic of Korea
| | - Jiwon Seo
- Department of ChemistryGwangju Institute of Science and Technology (GIST)123, Cheomdangwagi‐ro, Buk‐guGwangju61005Republic of Korea
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10
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Cui Q, Yu HD, Xu QJ, Liu Y, Wang YT, Li PH, Kong LC, Zhang HP, Jiang XY, Giuliodori AM, Fabbretti A, He CG, Ma HX. Antibiotic synergist OM19r reverses aminoglycoside resistance in multidrug-resistant Escherichia coli. Front Microbiol 2023; 14:1144946. [PMID: 37143537 PMCID: PMC10151501 DOI: 10.3389/fmicb.2023.1144946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Accepted: 03/24/2023] [Indexed: 05/06/2023] Open
Abstract
Introduction The continued emergence and spread of multidrug-resistant (MDR) bacterial pathogens require a new strategy to improve the efficacy of existing antibiotics. Proline-rich antimicrobial peptides (PrAMPs) could also be used as antibacterial synergists due to their unique mechanism of action. Methods Utilizing a series of experiments on membrane permeability, In vitro protein synthesis, In vitro transcription and mRNA translation, to further elucidate the synergistic mechanism of OM19r combined with gentamicin. Results A proline-rich antimicrobial peptide OM19r was identified in this study and its efficacy against Escherichia coli B2 (E. coli B2) was evaluated on multiple aspects. OM19r increased antibacterial activity of gentamicin against multidrug-resistance E. coli B2 by 64 folds, when used in combination with aminoglycoside antibiotics. Mechanistically, OM19r induced change of inner membrane permeability and inhibited translational elongation of protein synthesis by entering to E. coli B2 via intimal transporter SbmA. OM19r also facilitated the accumulation of intracellular reactive oxygen species (ROS). In animal models, OM19r significantly improved the efficacy of gentamicin against E. coli B2. Discussion Our study reveals that OM19r combined with GEN had a strong synergistic inhibitory effect against multi-drug resistant E. coli B2. OM19r and GEN inhibited translation elongation and initiation, respectively, and ultimately affected the normal protein synthesis of bacteria. These findings provide a potential therapeutic option against multidrug-resistant E. coli.
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Affiliation(s)
- Qi Cui
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Han-Dong Yu
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Qi-Jun Xu
- Engineering Research Center of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, College of Life Sciences, Jilin Agricultural University, Changchun, China
| | - Yue Liu
- Engineering Research Center of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, College of Life Sciences, Jilin Agricultural University, Changchun, China
| | - Yu-Ting Wang
- Engineering Research Center of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, College of Life Sciences, Jilin Agricultural University, Changchun, China
| | - Peng-Hui Li
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Ling-Cong Kong
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Hai-Peng Zhang
- Engineering Research Center of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, College of Life Sciences, Jilin Agricultural University, Changchun, China
| | - Xiu-Yun Jiang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Anna Maria Giuliodori
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino, Italy
| | - Attilio Fabbretti
- School of Biosciences and Veterinary Medicine, University of Camerino, Camerino, Italy
| | - Cheng-Guang He
- Engineering Research Center of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, College of Life Sciences, Jilin Agricultural University, Changchun, China
- Cheng-Guang He,
| | - Hong-Xia Ma
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- Engineering Research Center of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, College of Life Sciences, Jilin Agricultural University, Changchun, China
- *Correspondence: Hong-Xia Ma,
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11
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Jiang W, Xie Z, Huang S, Huang Q, Chen L, Gao X, Lin Z. Targeting cariogenic pathogens and promoting competitiveness of commensal bacteria with a novel pH-responsive antimicrobial peptide. J Oral Microbiol 2022; 15:2159375. [PMID: 36570976 PMCID: PMC9788686 DOI: 10.1080/20002297.2022.2159375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Novel ecological antimicrobial approaches to dental caries focus on inhibiting cariogenic pathogens while enhancing the growth of health-associated commensal communities or suppressing cariogenic virulence without affecting the diversity of oral microbiota, which emphasize the crucial role of establishing a healthy microbiome in caries prevention. Considering that the acidified cariogenic microenvironment leads to the dysbiosis of microecology and demineralization of enamel, exploiting the acidic pH as a bioresponsive trigger to help materials and medications target cariogenic pathogens is a promising strategy to develop novel anticaries approaches. In this study, a pH-responsive antimicrobial peptide, LH12, was designed utilizing the pH-sensitivity of histidine, which showed higher cationicity and stronger interactions with bacterial cytomembranes at acidic pH. Streptococcus mutans was used as the in vitro caries model to evaluate the inhibitory effects of LH12 on the cariogenic properties, such as biofilm formation, biofilm morphology, acidurance, acidogenicity, and exopolysaccharides synthesis. The dual-species model of Streptococcus mutans and Streptococcus gordonii was established in vitro to evaluate the regulation effects of LH12 on the mixed species microbial community containing both cariogenic bacteria and commensal bacteria. LH12 suppressed the cariogenic properties and regulated the bacterial composition to a healthier condition through a dual-functional mechanism. Firstly, LH12-targeted cariogenic pathogens in response to the acidified microenvironment and suppressed the cariogenic virulence by inhibiting the expression of multiple virulence genes and two-component signal transduction systems. Additionally, LH12 elevated H2O2 production of the commensal bacteria and subsequently improved the ecological competitiveness of the commensals. The dual-functional mechanism made LH12 a potential bioresponsive approach to caries management.
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Affiliation(s)
- Wentao Jiang
- Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, GuangdongChina
| | - Zhuo Xie
- Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, GuangdongChina
| | - Shuheng Huang
- Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, GuangdongChina
| | - Qiting Huang
- Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, GuangdongChina
| | - Lingling Chen
- Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, GuangdongChina
| | - Xianling Gao
- Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, GuangdongChina
| | - Zhengmei Lin
- Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, GuangdongChina,CONTACT Zhengmei Lin Hospital of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou, Guangdong510055, China
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12
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Zhang F, Yang P, Mao W, Zhong C, Zhang J, Chang L, Wu X, Liu H, Zhang Y, Gou S, Ni J. Short, mirror-symmetric antimicrobial peptides centered on "RRR" have broad-spectrum antibacterial activity with low drug resistance and toxicity. Acta Biomater 2022; 154:145-167. [PMID: 36241015 DOI: 10.1016/j.actbio.2022.10.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 08/31/2022] [Accepted: 10/03/2022] [Indexed: 12/14/2022]
Abstract
The increasingly severe bacterial resistance worldwide pushes people to discover and design potential antibacterial drugs unavoidably. In this work, a series of short, mirror-symmetric peptides were designed and successfully synthesized, centered on "RRR" and labeled with hydrophobic amino acids at both ends. Based on the structure-activity relationship analysis, LWWR (LWWRRRWWL-NH2) was screened as a desirable mirror-symmetric peptide for further study. As expected, LWWR displayed broad-spectrum antibacterial activity against the standard bacteria and antibiotic-resistant strains. Undoubtedly, the high stability of LWWR in a complex physiological environment was an essential guarantee to maximizing its antibacterial activity. Indeed, LWWR also exhibited a rapid bactericidal speed and a low tendency to develop bacterial resistance, based on the multiple actions of non-receptor-mediated membrane actions and intra-cellular mechanisms. Surprisingly, although LWWR showed similar in vivo antibacterial activity compared with Polymyxin B and Melittin, the in vivo safety of LWWR was far higher than that of them, so LWWR had better therapeutic potential. In summary, the desirable mirror-symmetric peptide LWWR was promised as a potential antibacterial agent to confront the antibiotics resistance crisis. STATEMENT OF SIGNIFICANCE: Witnessing the growing problem of antibiotic resistance, a series of short, mirror-symmetric peptides based on the symmetric center "RRR" and hydrophobic terminals were designed and synthesized in this study. Among, LWWR (LWWRRRWWL-NH2) presented broad-spectrum antibacterial activity both in vitro and in vivo due to its multiple mechanisms and good stability. Meanwhile, the low drug resistance and toxicity of LWWR also suggested its potential for clinical application. The findings of this study will provide some inspiration for the design and development of potential antibacterial agents, and contribute to the elimination of bacterial infections worldwide as soon as possible.
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Affiliation(s)
- Fangyan Zhang
- Institute of Materia Medica and Research Unit of Peptide Science, 2019RU066, Chinese Academy of Medical Sciences, Peking Union Medical College, No. 1 Xian Nong Tan Street, Beijing 100050, P. R. China; Institute of Pharmaceutics, School of Pharmacy and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, P. R. China
| | - Ping Yang
- Institute of Materia Medica and Research Unit of Peptide Science, 2019RU066, Chinese Academy of Medical Sciences, Peking Union Medical College, No. 1 Xian Nong Tan Street, Beijing 100050, P. R. China; Institute of Pharmaceutics, School of Pharmacy and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, P. R. China
| | - Wenbo Mao
- Institute of Materia Medica and Research Unit of Peptide Science, 2019RU066, Chinese Academy of Medical Sciences, Peking Union Medical College, No. 1 Xian Nong Tan Street, Beijing 100050, P. R. China; Institute of Pharmaceutics, School of Pharmacy and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, P. R. China
| | - Chao Zhong
- Institute of Materia Medica and Research Unit of Peptide Science, 2019RU066, Chinese Academy of Medical Sciences, Peking Union Medical College, No. 1 Xian Nong Tan Street, Beijing 100050, P. R. China; Institute of Pharmaceutics, School of Pharmacy and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, P. R. China
| | - Jingying Zhang
- Institute of Materia Medica and Research Unit of Peptide Science, 2019RU066, Chinese Academy of Medical Sciences, Peking Union Medical College, No. 1 Xian Nong Tan Street, Beijing 100050, P. R. China; Institute of Pharmaceutics, School of Pharmacy and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, P. R. China
| | - Linlin Chang
- Institute of Materia Medica and Research Unit of Peptide Science, 2019RU066, Chinese Academy of Medical Sciences, Peking Union Medical College, No. 1 Xian Nong Tan Street, Beijing 100050, P. R. China; Institute of Pharmaceutics, School of Pharmacy and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xiaoyan Wu
- Institute of Materia Medica and Research Unit of Peptide Science, 2019RU066, Chinese Academy of Medical Sciences, Peking Union Medical College, No. 1 Xian Nong Tan Street, Beijing 100050, P. R. China; Institute of Pharmaceutics, School of Pharmacy and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, P. R. China
| | - Hui Liu
- Institute of Materia Medica and Research Unit of Peptide Science, 2019RU066, Chinese Academy of Medical Sciences, Peking Union Medical College, No. 1 Xian Nong Tan Street, Beijing 100050, P. R. China; Institute of Pharmaceutics, School of Pharmacy and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yun Zhang
- Institute of Materia Medica and Research Unit of Peptide Science, 2019RU066, Chinese Academy of Medical Sciences, Peking Union Medical College, No. 1 Xian Nong Tan Street, Beijing 100050, P. R. China; Institute of Pharmaceutics, School of Pharmacy and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, P. R. China
| | - Sanhu Gou
- Institute of Materia Medica and Research Unit of Peptide Science, 2019RU066, Chinese Academy of Medical Sciences, Peking Union Medical College, No. 1 Xian Nong Tan Street, Beijing 100050, P. R. China; Institute of Pharmaceutics, School of Pharmacy and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, P. R. China
| | - Jingman Ni
- Institute of Materia Medica and Research Unit of Peptide Science, 2019RU066, Chinese Academy of Medical Sciences, Peking Union Medical College, No. 1 Xian Nong Tan Street, Beijing 100050, P. R. China; Institute of Pharmaceutics, School of Pharmacy and Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, P. R. China.
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13
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Dini I, De Biasi MG, Mancusi A. An Overview of the Potentialities of Antimicrobial Peptides Derived from Natural Sources. Antibiotics (Basel) 2022; 11:1483. [PMID: 36358138 PMCID: PMC9686932 DOI: 10.3390/antibiotics11111483] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 10/20/2022] [Accepted: 10/21/2022] [Indexed: 07/21/2023] Open
Abstract
Antimicrobial peptides (AMPs) are constituents of the innate immune system in every kind of living organism. They can act by disrupting the microbial membrane or without affecting membrane stability. Interest in these small peptides stems from the fear of antibiotics and the emergence of microorganisms resistant to antibiotics. Through membrane or metabolic disruption, they defend an organism against invading bacteria, viruses, protozoa, and fungi. High efficacy and specificity, low drug interaction and toxicity, thermostability, solubility in water, and biological diversity suggest their applications in food, medicine, agriculture, animal husbandry, and aquaculture. Nanocarriers can be used to protect, deliver, and improve their bioavailability effectiveness. High cost of production could limit their use. This review summarizes the natural sources, structures, modes of action, and applications of microbial peptides in the food and pharmaceutical industries. Any restrictions on AMPs' large-scale production are also taken into consideration.
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Affiliation(s)
- Irene Dini
- Department of Pharmacy, University of Naples Federico II, Via Domenico Montesano 49, 80131 Napoli, Italy
| | | | - Andrea Mancusi
- Department of Food Microbiology, Istituto Zooprofilattico Sperimentale del Mezzogiorno, Via Salute 2, 80055 Portici, Italy
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14
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Kong D, Hua X, Zhou R, Cui J, Wang T, Kong F, You H, Liu X, Adu-Amankwaah J, Guo G, Zheng K, Wu J, Tang R. Antimicrobial and Anti-Inflammatory Activities of MAF-1-Derived Antimicrobial Peptide Mt6 and Its D-Enantiomer D-Mt6 against Acinetobacter baumannii by Targeting Cell Membranes and Lipopolysaccharide Interaction. Microbiol Spectr 2022; 10:e0131222. [PMID: 36190276 PMCID: PMC9603722 DOI: 10.1128/spectrum.01312-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2022] [Accepted: 08/30/2022] [Indexed: 12/30/2022] Open
Abstract
Antibiotic resistance in Acinetobacter baumannii is on the rise around the world, highlighting the urgent need for novel antimicrobial drugs. Antimicrobial peptides (AMPs) contribute to effective protection against infections by pathogens, making them the most promising options for next-generation antibiotics. Here, we report two designed, cationic, antimicrobial-derived peptides: Mt6, and its dextroisomer D-Mt6, belonging to the analogs of MAF-1, which is isolated from the instar larvae of houseflies. Both Mt6 and D-Mt6 have a broad-spectrum antimicrobial activity that is accompanied by strong antibacterial activities, especially against A. baumannii planktonic bacteria and biofilms. Additionally, the effect of D-Mt6 against A. baumannii is stable in a variety of physiological settings, including enzyme, salt ion, and hydrogen ion environments. Importantly, D-Mt6 cleans the bacteria on Caenorhabditis elegans without causing apparent toxicity and exhibits good activity in vivo. Both Mt6 and D-Mt6 demonstrated synergistic or additive capabilities with traditional antibiotics against A. baumannii, demonstrating their characteristics as potential complements to combination therapy. Scanning electron microscopy (SEM) and laser scanning confocal microscope (LSCM) experiments revealed that two analogs displayed rapid bactericidal activity by destroying cell membrane integrity. Furthermore, in lipopolysaccharide (LPS)-stimulated macrophage cells, these AMPs drastically decreased IL-1β and TNF-a gene expression and protein secretion, implying anti-inflammatory characteristics. This trait is likely due to its dual function of directly binding LPS and inhibiting the LPS-activated mitogen-activated protein kinase (MAPK) signaling pathways in macrophages. Our findings suggested that D-Mt6 could be further developed as a novel antimicrobial/anti-inflammatory agent and used in the treatment of A. baumannii infections. IMPORTANCE Around 700,000 people worldwide die each year from antibiotic-resistant pathogens. Acinetobacter baumannii in clinical specimens increases year by year, and it is developing a strong resistance to clinical drugs, which is resulting in A. baumannii becoming the main opportunistic pathogen. Antimicrobial peptides show great potential as new antibacterial drugs that can replace traditional antibiotics. In our study, Mt6 and D-Mt6, two new antimicrobial peptides, were designed based on a natural peptide that we first discovered in the hemlymphocytes of housefly larvae. Both Mt6 and D-Mt6 showed broad-spectrum antimicrobial activity, especially against A. baumannii, by damaging membrane integrity. Moreover, D-Mt6 showed better immunoregulatory activity against LPS induced inflammation through its LPS-neutralizing and suppression on MAPK signaling. This study suggested that D-Mt6 is a promising candidate drug as a derived peptide against A. baumannii.
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Affiliation(s)
- Delong Kong
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, China
| | - Xuan Hua
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, China
| | - Rui Zhou
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, China
| | - Jie Cui
- Department of Physiology, Xuzhou Medical University, Xuzhou, China
| | - Tao Wang
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
- Key Laboratory of Medical Microbiology and Parasitology of Education Department of Guizhou, Guizhou Medical University, Guiyang, Guizhou, China
| | - Fanyun Kong
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, China
| | - Hongjuan You
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, China
| | - Xiangye Liu
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, China
| | | | - Guo Guo
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
| | - Kuiyang Zheng
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, China
- National Demonstration Center for Experimental Basic Medical Sciences Education, Xuzhou Medical University, Xuzhou, China
| | - Jianwei Wu
- School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
| | - Renxian Tang
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogenic Biology and Immunology, Xuzhou Medical University, Xuzhou, China
- National Demonstration Center for Experimental Basic Medical Sciences Education, Xuzhou Medical University, Xuzhou, China
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15
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Shahraki PZ, Farrokh P. PL‐101‐WK
, a novel tryptophan‐ and lysine‐rich peptide with antimicrobial activity against
Staphylococcus aureus. Pept Sci (Hoboken) 2022. [DOI: 10.1002/pep2.24296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Parisa Farrokh
- School of Biology Damghan University Damghan Iran
- Institute of Biological Sciences Damghan University Damghan Iran
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16
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Luong AD, Buzid A, Luong JHT. Important Roles and Potential Uses of Natural and Synthetic Antimicrobial Peptides (AMPs) in Oral Diseases: Cavity, Periodontal Disease, and Thrush. J Funct Biomater 2022; 13:jfb13040175. [PMID: 36278644 PMCID: PMC9589978 DOI: 10.3390/jfb13040175] [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: 09/16/2022] [Revised: 09/29/2022] [Accepted: 09/30/2022] [Indexed: 01/10/2023] Open
Abstract
Numerous epithelial cells and sometimes leukocytes release AMPs as their first line of defense. AMPs encompass cationic histatins, defensins, and cathelicidin to encounter oral pathogens with minimal resistance. However, their concentrations are significantly below the effective levels and AMPs are unstable under physiological conditions due to proteolysis, acid hydrolysis, and salt effects. In parallel to a search for more effective AMPs from natural sources, considerable efforts have focused on synthetic stable and low-cytotoxicy AMPs with significant activities against microorganisms. Using natural AMP templates, various attempts have been used to synthesize sAMPs with different charges, hydrophobicity, chain length, amino acid sequence, and amphipathicity. Thus far, sAMPs have been designed to target Streptococcus mutans and other common oral pathogens. Apart from sAMPs with antifungal activities against Candida albicans, future endeavors should focus on sAMPs with capabilities to promote remineralization and antibacterial adhesion. Delivery systems using nanomaterials and biomolecules are promising to stabilize, reduce cytotoxicity, and improve the antimicrobial activities of AMPs against oral pathogens. Nanostructured AMPs will soon become a viable alternative to antibiotics due to their antimicrobial mechanisms, broad-spectrum antimicrobial activity, low drug residue, and ease of synthesis and modification.
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Affiliation(s)
- Albert Donald Luong
- Department of Epidemiology and Environmental Health, School of Public Health and Health Professions, University of Buffalo, Buffalo, NY 14215, USA
| | - Alyah Buzid
- Department of Chemistry, College of Science, King Faisal University, P.O. Box 380, Al-Ahsa 31982, Saudi Arabia
| | - John H. T. Luong
- School of Chemistry and Analytical & Biological Chemistry Research Facility (ABCRF), University College Cork, College Road, T12 YN60 Cork, Ireland
- Correspondence: or
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17
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New antimicrobial peptide-antibiotic combination strategy for Pseudomonas aeruginosa inactivation. Biointerphases 2022; 17:041002. [PMID: 35922283 DOI: 10.1116/6.0001981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Novel antimicrobials or new treatment strategies are urgently needed to treat Pseudomonas aeruginosa (P. aeruginosa) related infections and especially to address the problem of antibiotic resistance. We propose a novel strategy that combines the human antimicrobial peptide (AMP) LL37 with different antibiotics to find synergistic AMP-antibiotic combinations against P. aeruginosa strains in vitro. Our results showed that LL37 exhibited synergistic inhibitory and bactericidal effects against P. aeruginosa strains PAO1 and PA103 when combined with the antibiotics vancomycin, azithromycin, polymyxin B, and colistin. In addition, LL37 caused strong outer membrane permeabilization, as demonstrated through measurement of an increased uptake of the fluorescent probe N-phenyl-1-naphthylamine. The membrane permeabilization effects appear to explain why it was easier to rescue the effectiveness of the antibiotic toward the bacteria because the outer membrane of P. aeruginosa exhibits barrier function for antibiotics. Furthermore, the change in the zeta potential was measured for P. aeruginosa strains with the addition of LL37. Zeta potentials for P. aeruginosa strains PAO1 and PA103 were -40.9 and -10.9 mV, respectively. With the addition of LL37, negative zeta potentials were gradually neutralized. We found that positively charged LL37 can interact with and neutralize the negatively charged bacterial outer membrane through electrostatic interactions, and the process of neutralization is believed to have contributed to the increase in outer membrane permeability. Finally, to further illustrate the relationship between outer membrane permeabilization and the uptake of antibiotics, we used LL37 to make the outer membrane of P. aeruginosa strains more permeable, and minimum inhibitory concentrations (MICs) for several antibiotics (colistin, gentamicin, polymyxin B, vancomycin, and azithromycin) were measured. The MICs decreased were twofold to fourfold, in general. For example, the MICs of azithromycin and vancomycin decreased more than fourfold when against P. aeruginosa strain PAO1, which were the greatest decrease of any of the antibiotics tested in this experiment. As for PA103, the MIC of polymyxin B2 decreased fourfold, which was the strongest decrease seen for any of the antibiotics tested in this experiment. The increased uptake of antibiotics not only demonstrates the barrier role of the outer membrane but also validates the mechanism of synergistic effects that we have proposed. These results indicate the great potential of an LL37-antibiotic combination strategy and provide possible explanations for the mechanisms behind this synergy.
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18
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Wang Y, Haqmal MA, Liang YD, Muhammad I, Zhao XO, Elken EM, Gao YH, Jia Y, He CG, Wang YM, Kong LC, Ma HX. Antibacterial activity and cytotoxicity of a novel bacteriocin isolated from Pseudomonas sp. strain 166. Microb Biotechnol 2022; 15:2337-2350. [PMID: 35849816 PMCID: PMC9437881 DOI: 10.1111/1751-7915.14096] [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: 03/09/2022] [Revised: 05/15/2022] [Accepted: 05/18/2022] [Indexed: 11/30/2022] Open
Abstract
Pseudomonas sp. strain 166 was isolated from soil samples from Changbai Mountains. A novel bacteriocin PA166 from Pseudomonas sp. 166 was purified using ammonium sulfate, dextran gel chromatography column and Q-Sepharose column chromatography successively. The molecular mass of bacteriocin PA166 was found to be 49.38 kDa by SDS-PAGE and liquid chromatography-mass spectrometry (MS)/MS. Bacteriocin PA166 showed stability at a wide range of pH (2-10), and thermal stability (40, 60, 80 and 100°C). The bacteriocin PA166 antimicrobial activity was slightly inhibited by Ca2+ , K+ and Mg2+ . The minimum bactericidal concentrations of bacteriocin PA166 against five Pasteurella multocida strains ranged from 2 to 8 μg ml-1 . Bacteriocin PA166 showed low cytotoxicity and a higher treatment index (TI = 82.51). Fluorescence spectroscopy indicated that bacteriocin PA166 destroyed the cell membrane to exert antimicrobial activity. In summary, bacteriocin PA166 had strong antibacterial activity, high TI and low toxicity, and hence could serve as a potential clinical therapeutic drug.
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Affiliation(s)
- Yu Wang
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China
| | - M Aman Haqmal
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China
| | - Yue-Dong Liang
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China
| | - Inam Muhammad
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China.,Department of Animal Sciences, Shaheed Benazir Bhutto University Sheringal Dir Upper-Pakistan, Sheringal, Pakistan
| | - Xiao-Ou Zhao
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China
| | - Emad Mohammed Elken
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China.,Animal Production Department, Faculty of Agriculture, Al-Azhar University, Nasr City, Cairo, 11884, Egypt
| | - Yun-Hang Gao
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China
| | - Yu Jia
- Jilin Agricultural University, College of Life Science, Changchun, China
| | - Cheng-Guang He
- Jilin Agricultural University, College of Life Science, Changchun, China
| | - Yi-Ming Wang
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China
| | - Ling-Cong Kong
- College of Veterinary Medicine, Jilin Agricultural University, 130118, Changchun, Jilin, China.,The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Xincheng Street No. 2888, Changchun, 130118, China
| | - Hong-Xia Ma
- Jilin Agricultural University, College of Life Science, Changchun, China.,The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Xincheng Street No. 2888, Changchun, 130118, China.,The Engineering Research Center of Bioreactor and Drug Development, Ministry of Education, Jilin Agricultural University, Changchun, China
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19
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Chou S, Zhang S, Guo H, Chang YF, Zhao W, Mou X. Targeted Antimicrobial Agents as Potential Tools for Modulating the Gut Microbiome. Front Microbiol 2022; 13:879207. [PMID: 35875544 PMCID: PMC9302920 DOI: 10.3389/fmicb.2022.879207] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 06/13/2022] [Indexed: 12/11/2022] Open
Abstract
The gut microbiome plays a pivotal role in maintaining the health of the hosts; however, there is accumulating evidence that certain bacteria in the host, termed pathobionts, play roles in the progression of diseases. Although antibiotics can be used to eradicate unwanted bacteria, the side effects of antibiotic treatment lead to a great need for more targeted antimicrobial agents as tools to modulate the microbiome more precisely. Herein, we reviewed narrow-spectrum antibiotics naturally made by plants and microorganisms, followed by more targeted antibiotic agents including synthetic peptides, phage, and targeted drug delivery systems, from the perspective of using them as potential tools for modulating the gut microbiome for favorable effects on the health of the host. Given the emerging discoveries on pathobionts and the increasing knowledge on targeted antimicrobial agents reviewed in this article, we anticipate targeted antimicrobial agents will emerge as a new generation of a drug to treat microbiome-involved diseases.
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Affiliation(s)
- Shuli Chou
- Center for Infection and Immunity Studies, School of Medicine, Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
| | - Shiqing Zhang
- Center for Infection and Immunity Studies, School of Medicine, Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
| | - Huating Guo
- Center for Infection and Immunity Studies, School of Medicine, Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
| | - Yung-fu Chang
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, United States
| | - Wenjing Zhao
- Center for Infection and Immunity Studies, School of Medicine, Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
- *Correspondence: Wenjing Zhao, ;
| | - Xiangyu Mou
- Center for Infection and Immunity Studies, School of Medicine, Shenzhen Campus of Sun Yat-sen University, Shenzhen, China
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Xiangyu Mou,
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20
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Rawangkan A, Siriphap A, Yosboonruang A, Kiddee A, Pook-In G, Saokaew S, Sutheinkul O, Duangjai A. Potential Antimicrobial Properties of Coffee Beans and Coffee By-Products Against Drug-Resistant Vibrio cholerae. Front Nutr 2022; 9:865684. [PMID: 35548583 PMCID: PMC9083461 DOI: 10.3389/fnut.2022.865684] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 03/21/2022] [Indexed: 11/13/2022] Open
Abstract
Vibrio cholerae is the causative organism of the cholera epidemic, and it remains a serious global health problem, particularly the multidrug-resistant strain, despite the development of several generic drugs and vaccines over time. Natural products have long been exploited for the treatment of various diseases, and this study aimed to evaluate the in vitro antibacterial activity of coffee beans and coffee by-products against V. cholerae antimicrobial resistant strains. A total of 9 aqueous extracts were investigated, including light coffee (LC), medium coffee (MC), dark coffee (DC), dried green coffee (DGC), dried red coffee (DRC), fresh red coffee (FRC), Arabica leaf (AL), Robusta leaf (RL), and coffee pulp (CP). The influential coffee phytochemicals, i.e., chlorogenic acid (CGA), caffeic acid (CA), and caffeine, were determined using HPLC. The antibacterial properties were tested by agar well-diffusion techniques, and the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were further determined against 20 V. cholerae isolates. The results revealed that all tested strains were sensitive to coffee extracts, with MIC and MBC values in the range of 3.125-25.0 mg/mL and 12.5-50.0 mg/mL, respectively. With a MIC of 6.25 mg/mL, DGC, DRC, and CP appeared to be the most effective compounds against 65, 60, and 55% of clinical strains, respectively. The checkerboard assay revealed that the combination of coffee extract and tetracycline was greater than either treatment alone, with the fractional inhibitory concentration index (FICI) ranging from 0.005 to 0.258. It is important to note that CP had the lowest FICI (0.005) when combined with tetracycline at 60 ng/mL, which is the most effective dose against V. cholerae six-drug resistance strains (azithromycin, colistin, nalidixic acid, sulfamethoxazole, tetracycline, and trimethoprim), with a MIC of 47.5 μg/mL (MIC alone = 12.5 mg/mL). Time killing kinetics analysis suggested that CA might be the most effective treatment for drug-resistant V. cholerae as it reduced bacterial growth by 3 log10 CFU/mL at a concentration of 8 mg/mL within 1 h, via disrupting membrane permeability, as confirmed by scanning electron microscopy (SEM). This is the first report showing that coffee beans and coffee by-product extracts are an alternative for multidrug-resistant V. cholerae treatment.
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Affiliation(s)
- Anchalee Rawangkan
- School of Medical Sciences, University of Phayao, Phayao, Thailand
- Unit of Excellence in Research and Product Development of Coffee, Division of Physiology, School of Medical Sciences, University of Phayao, Phayao, Thailand
| | | | | | - Anong Kiddee
- School of Medical Sciences, University of Phayao, Phayao, Thailand
| | - Grissana Pook-In
- School of Medical Sciences, University of Phayao, Phayao, Thailand
| | - Surasak Saokaew
- Division of Social and Administrative Pharmacy, Department of Pharmaceutical Care, School of Pharmaceutical Sciences, University of Phayao, Phayao, Thailand
- Center of Health Outcomes Research and Therapeutic Safety (Cohorts), School of Pharmaceutical Sciences, University of Phayao, Phayao, Thailand
- Unit of Excellence on Clinical Outcomes Research and IntegratioN (UNICORN), School of Pharmaceutical Sciences, University of Phayao, Phayao, Thailand
| | | | - Acharaporn Duangjai
- School of Medical Sciences, University of Phayao, Phayao, Thailand
- Unit of Excellence in Research and Product Development of Coffee, Division of Physiology, School of Medical Sciences, University of Phayao, Phayao, Thailand
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21
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Lai Z, Yuan X, Chen H, Zhu Y, Dong N, Shan A. Strategies employed in the design of antimicrobial peptides with enhanced proteolytic stability. Biotechnol Adv 2022; 59:107962. [PMID: 35452776 DOI: 10.1016/j.biotechadv.2022.107962] [Citation(s) in RCA: 52] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 03/14/2022] [Accepted: 04/13/2022] [Indexed: 12/12/2022]
Abstract
Due to the alarming developing rate of multidrug-resistant bacterial pathogens, the development and modification of antimicrobial peptides (AMPs) are unprecedentedly active. Despite the fact that considerable efforts have been expended on the discovery and design strategies of AMPs, the clinical translation of peptide antibiotics remains inadequate. A large number of articles and reviews credited the limited success of AMPs to their poor stability in the biological environment, particularly their poor proteolytic stability. In the past forty years, various design strategies have been used to improve the proteolytic stability of AMPs, such as sequence modification, cyclization, peptidomimetics, and nanotechnology. Herein, we focus our discussion on the progress made in improving the proteolytic stability of AMPs and the principle, successes, and limitations of various anti-proteolytic design strategies. It is of prospective significance to extend current insights into the degradation-related inactivation of AMPs and also alleviate/overcome the problem.
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Affiliation(s)
- Zhenheng Lai
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China
| | - Xiaojie Yuan
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China
| | - Hongyu Chen
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China
| | - Yunhui Zhu
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China
| | - Na Dong
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China
| | - Anshan Shan
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China.
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22
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Antimicrobial Activity of the Green Tea Polyphenol (−)-Epigallocatechin-3-Gallate (EGCG) against Clinical Isolates of Multidrug-Resistant Vibrio cholerae. Antibiotics (Basel) 2022; 11:antibiotics11040518. [PMID: 35453268 PMCID: PMC9028445 DOI: 10.3390/antibiotics11040518] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 03/28/2022] [Accepted: 04/12/2022] [Indexed: 02/04/2023] Open
Abstract
The spread of multidrug-resistant (MDR) Vibrio cholerae necessitates the development of novel prevention and treatment strategies. This study aims to evaluate the in vitro antibacterial activity of green tea polyphenol (−)-epigallocatechin-3-gallate (EGCG) against MDR V. cholerae. First, MIC and MBC values were evaluated by broth microdilution techniques against 45 V. cholerae strains. The checkerboard assay was then used to determine the synergistic effect of EGCG and tetracycline. The pharmaceutical mode of action of EGCG was clarified by time-killing kinetics and membrane disruption assay. Our results revealed that all of the 45 clinical isolates were susceptible to EGCG, with MIC and MBC values in the range of 62.5–250 µg/mL and 125–500 µg/mL, respectively. Furthermore, the combination of EGCG and tetracycline was greater than either treatment alone, with a fractional inhibitory concentration index (FICI) of 0.009 and 0.018 in the O1 and O139 representative serotypes, respectively. Time-killing kinetics analysis suggested that EGCG had bactericidal activity for MDR V. cholerae after exposure to at least 62.5 µg/mL EGCG within 1 h. The mode of action of EGCG might be associated with membrane disrupting permeability, as confirmed by scanning electron microscopy. This is the first indication that EGCG is a viable anti-MDR V. cholerae treatment.
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Li B, Ouyang X, Ba Z, Yang Y, Zhang J, Liu H, Zhang T, Zhang F, Zhang Y, Gou S, Ni J. Novel β-Hairpin Antimicrobial Peptides Containing the β-Turn Sequence of -RRRF- Having High Cell Selectivity and Low Incidence of Drug Resistance. J Med Chem 2022; 65:5625-5641. [DOI: 10.1021/acs.jmedchem.1c02140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Beibei Li
- Institute of Pharmaceutics, School of Pharmacy and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Xu Ouyang
- Institute of Pharmaceutics, School of Pharmacy and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Zufang Ba
- Institute of Pharmaceutics, School of Pharmacy and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
| | - Yinyin Yang
- Institute of Pharmaceutics, School of Pharmacy and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
| | - Jingying Zhang
- Institute of Pharmaceutics, School of Pharmacy and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Hui Liu
- Institute of Pharmaceutics, School of Pharmacy and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Tianyue Zhang
- Institute of Pharmaceutics, School of Pharmacy and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
| | - Fangyan Zhang
- Institute of Pharmaceutics, School of Pharmacy and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
| | - Yun Zhang
- Institute of Pharmaceutics, School of Pharmacy and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Sanhu Gou
- Institute of Pharmaceutics, School of Pharmacy and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Jingman Ni
- Institute of Pharmaceutics, School of Pharmacy and Research Unit of Peptide Science, Chinese Academy of Medical Sciences, 2019RU066, Lanzhou University, Lanzhou 730000, China
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China
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Ajish C, Yang S, Kumar SD, Kim EY, Min HJ, Lee CW, Shin SH, Shin SY. A novel hybrid peptide composed of LfcinB6 and KR-12-a4 with enhanced antimicrobial, anti-inflammatory and anti-biofilm activities. Sci Rep 2022; 12:4365. [PMID: 35288606 PMCID: PMC8921290 DOI: 10.1038/s41598-022-08247-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 03/04/2022] [Indexed: 11/17/2022] Open
Abstract
Hybridizing two known antimicrobial peptides (AMPs) is a simple and effective strategy for designing antimicrobial agents with enhanced cell selectivity against bacterial cells. Here, we generated a hybrid peptide Lf-KR in which LfcinB6 and KR-12-a4 were linked with a Pro hinge to obtain a novel AMP with potent antimicrobial, anti-inflammatory, and anti-biofilm activities. Lf-KR exerted superior cell selectivity for bacterial cells over sheep red blood cells. Lf-KR showed broad-spectrum antimicrobial activities (MIC: 4–8 μM) against tested 12 bacterial strains and retained its antimicrobial activity in the presence of salts at physiological concentrations. Membrane depolarization and dye leakage assays showed that the enhanced antimicrobial activity of Lf-KR was due to increased permeabilization and depolarization of microbial membranes. Lf-KR significantly inhibited the expression and production of pro-inflammatory cytokines (nitric oxide and tumor necrosis factor‐α) in LPS-stimulated mouse macrophage RAW264.7 cells. In addition, Lf-KR showed a powerful eradication effect on preformed multidrug-resistant Pseudomonas aeruginosa (MDRPA) biofilms. We confirmed using confocal laser scanning microscopy that a large portion of the preformed MDRPA biofilm structure was perturbed by the addition of Lf-KR. Collectively, our results suggest that Lf-KR can be an antimicrobial, anti-inflammatory, and anti-biofilm candidate as a pharmaceutical agent.
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25
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In Vitro Evaluation of Antimicrobial Peptides from the Black Soldier Fly ( Hermetia Illucens) against a Selection of Human Pathogens. Microbiol Spectr 2022; 10:e0166421. [PMID: 34985302 PMCID: PMC8729770 DOI: 10.1128/spectrum.01664-21] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Antimicrobial peptides (AMPs) are being explored as alternatives to traditional antibiotics to combat the rising antimicrobial resistance. Insects have proven to be a valuable source of new, potent AMPs with large structural diversity. For example, the black soldier fly has one of the largest AMP repertoires ever recorded in insects. Currently, however, this AMP collection has not yet undergone antimicrobial evaluation or in-depth in vitro characterization. This study evaluated the activity of a library of 36 black soldier fly AMPs against a panel of human pathogens (Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Candida albicans, and Aspergillus fumigatus) and a human cell line (MRC5-SV2). The activity profile of two cecropins (Hill-Cec1 and Hill-Cec10) with potent Gram-negative activity, was further explored by characterizing their hemolysis, time-to-kill kinetics, membrane-permeabilization properties, and anti-biofilm activity. Hill-Cec1 and Hill-Cec10 also showed high activity against other bacterial species, including Klebsiella pneumoniae and multi-drug resistant P. aeruginosa. Both AMPs are bactericidal and have a rapid onset of action with membrane-permeabilizing effects. Hill-Cec1 and Hill-Cec10 were also able to prevent P. aeruginosa biofilm formation, but no relevant effect was seen on biofilm eradication. Overall, Hill-Cec1 and Hill-Cec10 are promising leads for new antimicrobial development to treat critical infections caused by Gram-negative pathogens such as P. aeruginosa. IMPORTANCE With the ever growing antimicrobial resistance, finding new candidates for antimicrobial drug development is indispensable. Antimicrobial peptides have steadily gained attention as alternatives for conventional antibiotics, due to some highly desirable characteristics, such as their low propensity for resistance development. With this article, we aim to upgrade the knowledge on the activity of black soldier fly antimicrobial peptides and their potential as future therapeutics. To achieve this, we have evaluated for the first time a library of 36 synthetically produced peptides from the black soldier fly against a range of human pathogens and a human cell line. Two selected peptides have undergone additional testing to characterize their antimicrobial profile against P. aeruginosa, a clinically important Gram-negative pathogen with a high established resistance. Overall, this research has contributed to the search for new peptide drug leads to combat the rising antimicrobial resistance.
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26
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Wesseling CMJ, Slingerland CJ, Veraar S, Lok S, Martin NI. Structure-Activity Studies with Bis-Amidines That Potentiate Gram-Positive Specific Antibiotics against Gram-Negative Pathogens. ACS Infect Dis 2021; 7:3314-3335. [PMID: 34766746 PMCID: PMC8669655 DOI: 10.1021/acsinfecdis.1c00466] [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] [Indexed: 02/08/2023]
Abstract
![]()
Pentamidine, an FDA-approved
antiparasitic drug, was recently identified
as an outer membrane disrupting synergist that potentiates erythromycin,
rifampicin, and novobiocin against Gram-negative bacteria. The same
study also described a preliminary structure–activity relationship
using commercially available pentamidine analogues. We here report
the design, synthesis, and evaluation of a broader panel of bis-amidines
inspired by pentamidine. The present study both validates the previously
observed synergistic activity reported for pentamidine, while further
assessing the capacity for structurally similar bis-amidines to also
potentiate Gram-positive specific antibiotics against Gram-negative
pathogens. Among the bis-amidines prepared, a number of them were
found to exhibit synergistic activity greater than pentamidine. These
synergists were shown to effectively potentiate the activity of Gram-positive
specific antibiotics against multiple Gram-negative pathogens such
as Acinetobacter baumannii, Klebsiella pneumoniae, Pseudomonas
aeruginosa, and Escherichia coli, including polymyxin- and carbapenem-resistant strains.
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Affiliation(s)
- Charlotte M. J. Wesseling
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University, 2333 BE Leiden, The Netherlands
| | - Cornelis J. Slingerland
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University, 2333 BE Leiden, The Netherlands
| | - Shanice Veraar
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University, 2333 BE Leiden, The Netherlands
| | - Samantha Lok
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University, 2333 BE Leiden, The Netherlands
| | - Nathaniel I. Martin
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University, 2333 BE Leiden, The Netherlands
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27
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An Antibacterial Peptide with High Resistance to Trypsin Obtained by Substituting d-Amino Acids for Trypsin Cleavage Sites. Antibiotics (Basel) 2021; 10:antibiotics10121465. [PMID: 34943677 PMCID: PMC8698302 DOI: 10.3390/antibiotics10121465] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/22/2021] [Accepted: 11/26/2021] [Indexed: 11/16/2022] Open
Abstract
The poor stability of antibacterial peptide to protease limits its clinical application. Among these limitations, trypsin mainly exists in digestive tract, which is an insurmountable obstacle to orally delivered peptides. OM19R is a random curly polyproline cationic antimicrobial peptide, which has high antibacterial activity against some gram-negative bacteria, but its stability against pancreatin is poor. According to the structure-activity relationship of OM19R, all cationic amino acid residues (l-arginine and l-lysine) at the trypsin cleavage sites were replaced with corresponding d-amino acid residues to obtain the designed peptide OM19D, which not only maintained its antibacterial activity but also enhanced the stability of trypsin. Proceeding high concentrations of trypsin and long-time (such as 10 mg/mL, 8 h) treatment, it still had high antibacterial activity (MIC = 16–32 µg/mL). In addition, OM19D also showed high stability to serum, plasma and other environmental factors. It is similar to its parent peptide in secondary structure and mechanism of action. Therefore, this strategy is beneficial to improve the protease stability of antibacterial peptides.
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Lin Y, Liu S, Xi X, Ma C, Wang L, Chen X, Shi Z, Chen T, Shaw C, Zhou M. Study on the Structure-Activity Relationship of an Antimicrobial Peptide, Brevinin-2GUb, from the Skin Secretion of Hylarana guentheri. Antibiotics (Basel) 2021; 10:antibiotics10080895. [PMID: 34438945 PMCID: PMC8388802 DOI: 10.3390/antibiotics10080895] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 07/19/2021] [Accepted: 07/21/2021] [Indexed: 12/03/2022] Open
Abstract
Antimicrobial peptides (AMPs) are considered potential alternatives to antibiotics due to their advantages in solving antibiotic resistance. Brevinin-2GUb, which was extracted from the skin secretion of Hylarana guentheri, is a peptide with modest antimicrobial activity. Several analogues were designed to explore the structure–activity relationship and enhance its activity. In general, the Rana box is not an indispensable motif for the bioactivity of Brevinin-2GUb, and the first to the 19th amino acids at the N-terminal end are active fragments, such that shortening the peptide while maintaining its bioactivity is a promising strategy for the optimisation of peptides. Keeping a complete hydrophobic face and increasing the net charges are key factors for antimicrobial activity. With the increase of cationic charges, α-helical proportion, and amphipathicity, the activity of t-Brevinin-2GUb-6K (tB2U-6K), in combatting bacteria, drastically improved, especially against Gram-negative bacteria, and the peptide attained the capacity to kill clinical isolates and fungi as well, which made it possible to address some aspects of antibiotic resistance. Thus, peptide tB2U-6K, with potent antimicrobial activity against antibiotic-resistant bacteria, the capacity to inhibit the growth of biofilm, and low toxicity against normal cells, is of value to be further developed into an antimicrobial agent.
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Affiliation(s)
- Yaxian Lin
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.L.); (S.L.); (C.M.); (X.C.); (T.C.); (C.S.); (M.Z.)
| | - Siyan Liu
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.L.); (S.L.); (C.M.); (X.C.); (T.C.); (C.S.); (M.Z.)
| | - Xinping Xi
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.L.); (S.L.); (C.M.); (X.C.); (T.C.); (C.S.); (M.Z.)
- Correspondence: (X.X.); (L.W.)
| | - Chengbang Ma
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.L.); (S.L.); (C.M.); (X.C.); (T.C.); (C.S.); (M.Z.)
| | - Lei Wang
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.L.); (S.L.); (C.M.); (X.C.); (T.C.); (C.S.); (M.Z.)
- Correspondence: (X.X.); (L.W.)
| | - Xiaoling Chen
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.L.); (S.L.); (C.M.); (X.C.); (T.C.); (C.S.); (M.Z.)
| | - Zhanzhong Shi
- Department of Natural Sciences, Faculty of Science and Technology, Middlesex University, London NW4 4BT, UK;
| | - Tianbao Chen
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.L.); (S.L.); (C.M.); (X.C.); (T.C.); (C.S.); (M.Z.)
| | - Chris Shaw
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.L.); (S.L.); (C.M.); (X.C.); (T.C.); (C.S.); (M.Z.)
| | - Mei Zhou
- School of Pharmacy, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7BL, UK; (Y.L.); (S.L.); (C.M.); (X.C.); (T.C.); (C.S.); (M.Z.)
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Wu H, Xu P, Huang Y, Wang L, Ye X, Huang X, Ma L, Zhou C. PCL-1, a Trypsin-Resistant Peptide, Exerts Potent Activity Against Drug-Resistant Bacteria. Probiotics Antimicrob Proteins 2021; 13:1467-1480. [PMID: 34037941 DOI: 10.1007/s12602-021-09801-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/13/2021] [Indexed: 10/21/2022]
Abstract
Antimicrobial peptides (AMPs), which hold tremendous promise in overcoming the emergence of drug resistance, are limited in wide clinical applications due to their instability, especially against trypsin. Herein, we designed six peptide mutants based on the cathelicidin CATHPb2, followed by screening. Pb2-1, which showed the best activity against drug-resistant bacteria among these mutants, was selected to be combined with the trypsin inhibitory loop ORB-C to obtain two hybrid peptides: PCL-1 and Pb2-1TI. Notably, both of the hybrid peptides exhibited a remarkable enhancement in trypsin resistance compared with Pb2-1. The tests showed that PCL-1 displayed broad-spectrum antimicrobial activity that was superior to that of Pb2-1TI. In addition, PCL-1 had relatively lower cytotoxicity than Pb2-1TI towards the L02 and HaCaT cell lines and negligible hemolysis, as well as tolerance to high concentrations of salt, extreme pH, and temperature variations. In vivo, PCL-1 effectively improved the survival rate of mice that were systemically infected with drug-resistant Escherichia coli through efficient bacterial clearance from the blood and organs. With regard to mode of action, PCL-1 damaged the integrity of the bacterial cell membrane and attached to the membrane surface while bound to bacterial genomic DNA to eventually kill the bacteria. Altogether, the trypsin-resistant peptide PCL-1 is expected to be a candidate for the clinical treatment of bacterial infections.
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Affiliation(s)
- Haomin Wu
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, Jiangsu, China
| | - Pengfei Xu
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, Jiangsu, China
| | - Ya Huang
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, Jiangsu, China
| | - Liping Wang
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, Jiangsu, China
| | - Xinyue Ye
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, Jiangsu, China
| | - Xiaowei Huang
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, Jiangsu, China
| | - Lingman Ma
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, Jiangsu, China.
| | - ChangLin Zhou
- School of Life Science and Technology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, Jiangsu, China.
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30
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Wesseling CMJ, Wood TM, Slingerland CJ, Bertheussen K, Lok S, Martin NI. Thrombin-Derived Peptides Potentiate the Activity of Gram-Positive-Specific Antibiotics against Gram-Negative Bacteria. Molecules 2021; 26:molecules26071954. [PMID: 33808488 PMCID: PMC8037310 DOI: 10.3390/molecules26071954] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 03/24/2021] [Accepted: 03/26/2021] [Indexed: 12/13/2022] Open
Abstract
The continued rise of antibiotic resistance threatens to undermine the utility of the world’s current antibiotic arsenal. This problem is particularly troubling when it comes to Gram-negative pathogens for which there are inherently fewer antibiotics available. To address this challenge, recent attention has been focused on finding compounds capable of disrupting the Gram-negative outer membrane as a means of potentiating otherwise Gram-positive-specific antibiotics. In this regard, agents capable of binding to the lipopolysaccharide (LPS) present in the Gram-negative outer membrane are of particular interest as synergists. Recently, thrombin-derived C-terminal peptides (TCPs) were reported to exhibit unique LPS-binding properties. We here describe investigations establishing the capacity of TCPs to act as synergists with the antibiotics erythromycin, rifampicin, novobiocin, and vancomycin against multiple Gram-negative strains including polymyxin-resistant clinical isolates. We further assessed the structural features most important for the observed synergy and characterized the outer membrane permeabilizing activity of the most potent synergists. Our investigations highlight the potential for such peptides in expanding the therapeutic range of antibiotics typically only used to treat Gram-positive infections.
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Affiliation(s)
- Charlotte M. J. Wesseling
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University, 2333 Leiden, The Netherlands; (C.M.J.W.); (T.M.W.); (C.J.S.); (K.B.); (S.L.)
| | - Thomas M. Wood
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University, 2333 Leiden, The Netherlands; (C.M.J.W.); (T.M.W.); (C.J.S.); (K.B.); (S.L.)
- Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 Utrecht, The Netherlands
| | - Cornelis J. Slingerland
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University, 2333 Leiden, The Netherlands; (C.M.J.W.); (T.M.W.); (C.J.S.); (K.B.); (S.L.)
| | - Kristine Bertheussen
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University, 2333 Leiden, The Netherlands; (C.M.J.W.); (T.M.W.); (C.J.S.); (K.B.); (S.L.)
- Bio-Organic Synthesis Group, Leiden Institute of Chemistry, Leiden University, 2333 Leiden, The Netherlands
| | - Samantha Lok
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University, 2333 Leiden, The Netherlands; (C.M.J.W.); (T.M.W.); (C.J.S.); (K.B.); (S.L.)
| | - Nathaniel I. Martin
- Biological Chemistry Group, Institute of Biology Leiden, Leiden University, 2333 Leiden, The Netherlands; (C.M.J.W.); (T.M.W.); (C.J.S.); (K.B.); (S.L.)
- Correspondence:
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Li Q, Cebrián R, Montalbán-López M, Ren H, Wu W, Kuipers OP. Outer-membrane-acting peptides and lipid II-targeting antibiotics cooperatively kill Gram-negative pathogens. Commun Biol 2021; 4:31. [PMID: 33398076 PMCID: PMC7782785 DOI: 10.1038/s42003-020-01511-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 11/11/2020] [Indexed: 02/08/2023] Open
Abstract
The development and dissemination of antibiotic-resistant bacterial pathogens is a growing global threat to public health. Novel compounds and/or therapeutic strategies are required to face the challenge posed, in particular, by Gram-negative bacteria. Here we assess the combined effect of potent cell-wall synthesis inhibitors with either natural or synthetic peptides that can act on the outer-membrane. Thus, several linear peptides, either alone or combined with vancomycin or nisin, were tested against selected Gram-negative pathogens, and the best one was improved by further engineering. Finally, peptide D-11 and vancomycin displayed a potent antimicrobial activity at low μM concentrations against a panel of relevant Gram-negative pathogens. This combination was highly active in biological fluids like blood, but was non-hemolytic and non-toxic against cell lines. We conclude that vancomycin and D-11 are safe at >50-fold their MICs. Based on the results obtained, and as a proof of concept for the newly observed synergy, a Pseudomonas aeruginosa mouse infection model experiment was also performed, showing a 4 log10 reduction of the pathogen after treatment with the combination. This approach offers a potent alternative strategy to fight (drug-resistant) Gram-negative pathogens in humans and mammals.
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Affiliation(s)
- Qian Li
- grid.4830.f0000 0004 0407 1981Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 7, 9747AG Groningen, The Netherlands ,grid.34418.3a0000 0001 0727 9022Present Address: State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei Collaborative Innovation Center for Green Transformation of Bio-Resources, Hubei Key Laboratory of Industrial Biotechnology, School of Life Sciences, Hubei University, 430062 Wuhan, China
| | - Rubén Cebrián
- grid.4830.f0000 0004 0407 1981Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 7, 9747AG Groningen, The Netherlands
| | - Manuel Montalbán-López
- grid.4830.f0000 0004 0407 1981Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 7, 9747AG Groningen, The Netherlands ,grid.4489.10000000121678994Present Address: Department of Microbiology, Faculty of Sciences, University of Granada, Av. Fuentenueva s/n, 18071 Granada, Spain
| | - Huan Ren
- grid.216938.70000 0000 9878 7032State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Molecular Microbiology and Technology of the Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University, 30071 Tianjin, China
| | - Weihui Wu
- grid.216938.70000 0000 9878 7032State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Molecular Microbiology and Technology of the Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University, 30071 Tianjin, China
| | - Oscar P. Kuipers
- grid.4830.f0000 0004 0407 1981Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Nijenborgh 7, 9747AG Groningen, The Netherlands
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He S, Yang Z, Yu W, Li J, Li Z, Wang J, Shan A. Systematically Studying the Optimal Amino Acid Distribution Patterns of the Amphiphilic Structure by Using the Ultrashort Amphiphiles. Front Microbiol 2020; 11:569118. [PMID: 33324358 PMCID: PMC7725003 DOI: 10.3389/fmicb.2020.569118] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Accepted: 10/19/2020] [Indexed: 02/01/2023] Open
Abstract
Amphipathicity has traditionally been considered to be essential for the de novo design or systematic optimization of antimicrobial peptides (AMPs). However, the current research methods to study the relationship between amphiphilicity and antimicrobial activity are inappropriate, because the key parameters (hydrophobicity, positive charge, etc.) and secondary structure of AMPs are changed. To systematically and accurately study the effects of amphiphilicity on antimicrobial properties of AMPs, we designed parallel series of AMPs with a different order of amino acids in a sequence composed only of Arg and either Trp (WR series) or Leu (LR series), under conditions in which other vital parameters were fixed. Furthermore, based on the WR and LR peptides that can form stable amphiphilic β-sheet structures in the anionic membrane-mimetic environment, we found that high β-sheet amphipathic was accompanied by strong antimicrobial activity. Of such peptides, W5 ([RW]4W) and L5 ([RL]4L) with a nicely amphipathic β-sheet structure possessed the optimal therapeutic index. W5 and L5 also exhibited high stability in vitro and a potent membrane-disruptive mechanism. These results suggest that the alternate arrangement of hydrophobic and hydrophilic residues to form a stable amphipathic β-sheet structure is an essential factor that significantly affects the antimicrobial properties.
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Affiliation(s)
- Shiqi He
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Zhanyi Yang
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Weikang Yu
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Jiawei Li
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Zhongyu Li
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Jiajun Wang
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Anshan Shan
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
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Ramezanzadeh M, Saeedi N, Mesbahfar E, Farrokh P, Salimi F, Rezaei A. Design and characterization of new antimicrobial peptides derived from aurein 1.2 with enhanced antibacterial activity. Biochimie 2020; 181:42-51. [PMID: 33271197 DOI: 10.1016/j.biochi.2020.11.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 11/18/2020] [Accepted: 11/26/2020] [Indexed: 11/18/2022]
Abstract
Antimicrobial peptides (AMPs) are promising alternative agents for treating multidrug-resistant bacterial infections. Aurein 1.2 is a natural 13-amino acid AMP with antibacterial activity against Gram-positive bacteria. In this study, we designed three novel AMPs: aurein M1 (A10W), aurein M2 (D4K, E11K), and aurein M3 (A10W, D4K, E11K) to analyze the effect of Trp substitution and enhancement of positive charge on the activity of aurein 1.2. The AMP probability, physicochemical properties, secondary and tertiary structures, and amphipathic structure were predicted by various bioinformatics tools. After the synthesis of the peptides, their antibacterial activity, hemolysis, cytotoxicity, and structural analysis were assayed. Compared to the selectivity of aurein 1.2, the selectivity of aurein M2 and M3 with a net positive charge of +5 was improved 11.30- and 8.00-fold against Gram-positive and -negative bacteria, respectively. The hemolytic activity of aurein M2 was lower than that of aurein 1.2 and M3, while the higher percentage of human fibroblast cells were alive in the presence of aurein M3. Also, the MICs of aurein M3 toward Staphylococcus aureus and Escherichia coli at the physiologic salt were ≤16, which is recommended as a promising candidate for clinical investigation. Circular dichroism analysis indicated an alpha-helical structure in the peptide analogs that is similar to aurein 1.2 in the presence of 10 mM SDS. Therefore, increasing positive charge can be used successfully as an approach for improving the potency and selectivity of AMPs. Moreover, the beneficial effect of Trp substitution depends on its position and the sequence of peptides.
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Affiliation(s)
| | - Nasrin Saeedi
- School of Biology, Damghan University, Damghan, Iran
| | | | - Parisa Farrokh
- School of Biology, Damghan University, Damghan, Iran; Institute of Biological Sciences, Damghan University, Damghan, Iran.
| | | | - Arezou Rezaei
- School of Biology, Damghan University, Damghan, Iran; Institute of Biological Sciences, Damghan University, Damghan, Iran
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Hyun S, Choi Y, Jo D, Choo S, Park TW, Park SJ, Kim S, Lee S, Park S, Jin SM, Cheon DH, Yoo W, Arya R, Chong YP, Kim KK, Kim YS, Lee Y, Yu J. Proline Hinged Amphipathic α-Helical Peptide Sensitizes Gram-Negative Bacteria to Various Gram-Positive Antibiotics. J Med Chem 2020; 63:14937-14950. [DOI: 10.1021/acs.jmedchem.0c01506] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Soonsil Hyun
- Department of Chemistry & Education, Seoul National University, Seoul 08826, Korea
- Institute of Molecular Biology and Genetics, Seoul National University, Seoul 08826, Korea
| | - Yoonhwa Choi
- Department of Chemistry & Education, Seoul National University, Seoul 08826, Korea
| | - Doyeon Jo
- Department of Chemistry & Education, Seoul National University, Seoul 08826, Korea
| | - Seolah Choo
- Department of Chemistry & Education, Seoul National University, Seoul 08826, Korea
| | - Tae Woo Park
- Department of Chemistry & Education, Seoul National University, Seoul 08826, Korea
| | - Su-Jin Park
- Department of Infectious Disease, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Seoyeon Kim
- Department of Chemistry & Education, Seoul National University, Seoul 08826, Korea
| | - Seonju Lee
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Sohyun Park
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Sun Mi Jin
- Department of Chemistry & Education, Seoul National University, Seoul 08826, Korea
| | - Dae Hee Cheon
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Wanki Yoo
- Department of Precision Medicine, Sungkyunkwan University School of Medicine, Suwon 16419, Korea
| | - Rekha Arya
- Department of Precision Medicine, Sungkyunkwan University School of Medicine, Suwon 16419, Korea
| | - Yong Pil Chong
- Department of Infectious Disease, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Kyeong Kyu Kim
- Department of Precision Medicine, Sungkyunkwan University School of Medicine, Suwon 16419, Korea
| | - Yang Soo Kim
- Department of Infectious Disease, Asan Medical Center, University of Ulsan College of Medicine, Seoul 05505, Korea
| | - Yan Lee
- Department of Chemistry, Seoul National University, Seoul 08826, Korea
| | - Jaehoon Yu
- Department of Chemistry & Education, Seoul National University, Seoul 08826, Korea
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Huan Y, Kong Q, Mou H, Yi H. Antimicrobial Peptides: Classification, Design, Application and Research Progress in Multiple Fields. Front Microbiol 2020; 11:582779. [PMID: 33178164 PMCID: PMC7596191 DOI: 10.3389/fmicb.2020.582779] [Citation(s) in RCA: 572] [Impact Index Per Article: 143.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Accepted: 09/23/2020] [Indexed: 12/12/2022] Open
Abstract
Antimicrobial peptides (AMPs) are a class of small peptides that widely exist in nature and they are an important part of the innate immune system of different organisms. AMPs have a wide range of inhibitory effects against bacteria, fungi, parasites and viruses. The emergence of antibiotic-resistant microorganisms and the increasing of concerns about the use of antibiotics resulted in the development of AMPs, which have a good application prospect in medicine, food, animal husbandry, agriculture and aquaculture. This review introduces the progress of research on AMPs comprehensively and systematically, including their classification, mechanism of action, design methods, environmental factors affecting their activity, application status, prospects in various fields and problems to be solved. The research progress on antivirus peptides, especially anti-coronavirus (COVID-19) peptides, has been introduced given the COVID-19 pandemic worldwide in 2020.
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Affiliation(s)
| | - Qing Kong
- College of Food Science and Engineering, Ocean University of China, Qingdao, China
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Shtyrlin NV, Pugachev MV, Sapozhnikov SV, Garipov MR, Vafina RM, Grishaev DY, Pavelyev RS, Kazakova RR, Agafonova MN, Iksanova AG, Lisovskaya SA, Zeldi MI, Krylova ES, Nikitina EV, Sabirova AE, Kayumov AR, Shtyrlin YG. Novel Bis-Ammonium Salts of Pyridoxine: Synthesis and Antimicrobial Properties. Molecules 2020; 25:molecules25184341. [PMID: 32971844 PMCID: PMC7570726 DOI: 10.3390/molecules25184341] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 09/14/2020] [Accepted: 09/17/2020] [Indexed: 02/07/2023] Open
Abstract
A series of 108 novel quaternary bis-ammonium pyridoxine derivatives carrying various substituents at the quaternary nitrogen’s and acetal carbon was synthesized. Thirteen compounds exhibited antibacterial and antifungal activity (minimum inhibitory concentration (MIC) 0.25–16 µg/mL) comparable or superior than miramistin, benzalkonium chloride, and chlorhexidine. A strong correlation between the lipophilicity and antibacterial activity was found. The most active compounds had logP values in the range of 1–3, while compounds with logP > 6 and logP < 0 were almost inactive. All active compounds demonstrated cytotoxicity comparable with miramistin and chlorhexidine on HEK-293 cells and were three-fold less toxic when compared to benzalkonium chloride. The antibacterial activity of leading compound 5c12 on biofilm-embedded Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli or Pseudomonas aeruginosa was comparable or even higher than that of the benzalkonium chloride. In vivo 5c12 was considerably less toxic (LD50 1705 mg/kg) than benzalkonium chloride, miramistine, and chlorhexidine at oral administration on CD-1 mice. An aqueous solution of 5c12 (0.2%) was shown to be comparable to reference drugs efficiency on the rat’s skin model. The molecular target of 5c12 seems to be a cellular membrane as other quaternary ammonium salts. The obtained results make the described quaternary bis-ammonium pyridoxine derivatives promising and lead molecules in the development of the new antiseptics with a broad spectrum of antimicrobial activity.
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Affiliation(s)
- Nikita V. Shtyrlin
- Kazan (Volga region) Federal University, Scientific and Educational Center of Pharmaceutics, Kremlyovskaya St. 18, Kazan 420008, Russia; (N.V.S.); (M.V.P.); (S.V.S.); (M.R.G.); (R.M.V.); (D.Y.G.); (R.S.P.); (R.R.K.); (M.N.A.); (A.G.I.); (M.I.Z.); (E.S.K.); (E.V.N.); (A.E.S.); (A.R.K.)
| | - Mikhail V. Pugachev
- Kazan (Volga region) Federal University, Scientific and Educational Center of Pharmaceutics, Kremlyovskaya St. 18, Kazan 420008, Russia; (N.V.S.); (M.V.P.); (S.V.S.); (M.R.G.); (R.M.V.); (D.Y.G.); (R.S.P.); (R.R.K.); (M.N.A.); (A.G.I.); (M.I.Z.); (E.S.K.); (E.V.N.); (A.E.S.); (A.R.K.)
| | - Sergey V. Sapozhnikov
- Kazan (Volga region) Federal University, Scientific and Educational Center of Pharmaceutics, Kremlyovskaya St. 18, Kazan 420008, Russia; (N.V.S.); (M.V.P.); (S.V.S.); (M.R.G.); (R.M.V.); (D.Y.G.); (R.S.P.); (R.R.K.); (M.N.A.); (A.G.I.); (M.I.Z.); (E.S.K.); (E.V.N.); (A.E.S.); (A.R.K.)
| | - Marsel R. Garipov
- Kazan (Volga region) Federal University, Scientific and Educational Center of Pharmaceutics, Kremlyovskaya St. 18, Kazan 420008, Russia; (N.V.S.); (M.V.P.); (S.V.S.); (M.R.G.); (R.M.V.); (D.Y.G.); (R.S.P.); (R.R.K.); (M.N.A.); (A.G.I.); (M.I.Z.); (E.S.K.); (E.V.N.); (A.E.S.); (A.R.K.)
| | - Rusalia M. Vafina
- Kazan (Volga region) Federal University, Scientific and Educational Center of Pharmaceutics, Kremlyovskaya St. 18, Kazan 420008, Russia; (N.V.S.); (M.V.P.); (S.V.S.); (M.R.G.); (R.M.V.); (D.Y.G.); (R.S.P.); (R.R.K.); (M.N.A.); (A.G.I.); (M.I.Z.); (E.S.K.); (E.V.N.); (A.E.S.); (A.R.K.)
| | - Denis Y. Grishaev
- Kazan (Volga region) Federal University, Scientific and Educational Center of Pharmaceutics, Kremlyovskaya St. 18, Kazan 420008, Russia; (N.V.S.); (M.V.P.); (S.V.S.); (M.R.G.); (R.M.V.); (D.Y.G.); (R.S.P.); (R.R.K.); (M.N.A.); (A.G.I.); (M.I.Z.); (E.S.K.); (E.V.N.); (A.E.S.); (A.R.K.)
| | - Roman S. Pavelyev
- Kazan (Volga region) Federal University, Scientific and Educational Center of Pharmaceutics, Kremlyovskaya St. 18, Kazan 420008, Russia; (N.V.S.); (M.V.P.); (S.V.S.); (M.R.G.); (R.M.V.); (D.Y.G.); (R.S.P.); (R.R.K.); (M.N.A.); (A.G.I.); (M.I.Z.); (E.S.K.); (E.V.N.); (A.E.S.); (A.R.K.)
| | - Renata R. Kazakova
- Kazan (Volga region) Federal University, Scientific and Educational Center of Pharmaceutics, Kremlyovskaya St. 18, Kazan 420008, Russia; (N.V.S.); (M.V.P.); (S.V.S.); (M.R.G.); (R.M.V.); (D.Y.G.); (R.S.P.); (R.R.K.); (M.N.A.); (A.G.I.); (M.I.Z.); (E.S.K.); (E.V.N.); (A.E.S.); (A.R.K.)
| | - Mariya N. Agafonova
- Kazan (Volga region) Federal University, Scientific and Educational Center of Pharmaceutics, Kremlyovskaya St. 18, Kazan 420008, Russia; (N.V.S.); (M.V.P.); (S.V.S.); (M.R.G.); (R.M.V.); (D.Y.G.); (R.S.P.); (R.R.K.); (M.N.A.); (A.G.I.); (M.I.Z.); (E.S.K.); (E.V.N.); (A.E.S.); (A.R.K.)
| | - Alfiya G. Iksanova
- Kazan (Volga region) Federal University, Scientific and Educational Center of Pharmaceutics, Kremlyovskaya St. 18, Kazan 420008, Russia; (N.V.S.); (M.V.P.); (S.V.S.); (M.R.G.); (R.M.V.); (D.Y.G.); (R.S.P.); (R.R.K.); (M.N.A.); (A.G.I.); (M.I.Z.); (E.S.K.); (E.V.N.); (A.E.S.); (A.R.K.)
| | - Svetlana A. Lisovskaya
- Kazan Scientific Research Institute of Epidemiology and Microbiology, Kazan 420015, Russia;
| | - Marina I. Zeldi
- Kazan (Volga region) Federal University, Scientific and Educational Center of Pharmaceutics, Kremlyovskaya St. 18, Kazan 420008, Russia; (N.V.S.); (M.V.P.); (S.V.S.); (M.R.G.); (R.M.V.); (D.Y.G.); (R.S.P.); (R.R.K.); (M.N.A.); (A.G.I.); (M.I.Z.); (E.S.K.); (E.V.N.); (A.E.S.); (A.R.K.)
| | - Elena S. Krylova
- Kazan (Volga region) Federal University, Scientific and Educational Center of Pharmaceutics, Kremlyovskaya St. 18, Kazan 420008, Russia; (N.V.S.); (M.V.P.); (S.V.S.); (M.R.G.); (R.M.V.); (D.Y.G.); (R.S.P.); (R.R.K.); (M.N.A.); (A.G.I.); (M.I.Z.); (E.S.K.); (E.V.N.); (A.E.S.); (A.R.K.)
| | - Elena V. Nikitina
- Kazan (Volga region) Federal University, Scientific and Educational Center of Pharmaceutics, Kremlyovskaya St. 18, Kazan 420008, Russia; (N.V.S.); (M.V.P.); (S.V.S.); (M.R.G.); (R.M.V.); (D.Y.G.); (R.S.P.); (R.R.K.); (M.N.A.); (A.G.I.); (M.I.Z.); (E.S.K.); (E.V.N.); (A.E.S.); (A.R.K.)
| | - Alina E. Sabirova
- Kazan (Volga region) Federal University, Scientific and Educational Center of Pharmaceutics, Kremlyovskaya St. 18, Kazan 420008, Russia; (N.V.S.); (M.V.P.); (S.V.S.); (M.R.G.); (R.M.V.); (D.Y.G.); (R.S.P.); (R.R.K.); (M.N.A.); (A.G.I.); (M.I.Z.); (E.S.K.); (E.V.N.); (A.E.S.); (A.R.K.)
| | - Airat R. Kayumov
- Kazan (Volga region) Federal University, Scientific and Educational Center of Pharmaceutics, Kremlyovskaya St. 18, Kazan 420008, Russia; (N.V.S.); (M.V.P.); (S.V.S.); (M.R.G.); (R.M.V.); (D.Y.G.); (R.S.P.); (R.R.K.); (M.N.A.); (A.G.I.); (M.I.Z.); (E.S.K.); (E.V.N.); (A.E.S.); (A.R.K.)
| | - Yurii G. Shtyrlin
- Kazan (Volga region) Federal University, Scientific and Educational Center of Pharmaceutics, Kremlyovskaya St. 18, Kazan 420008, Russia; (N.V.S.); (M.V.P.); (S.V.S.); (M.R.G.); (R.M.V.); (D.Y.G.); (R.S.P.); (R.R.K.); (M.N.A.); (A.G.I.); (M.I.Z.); (E.S.K.); (E.V.N.); (A.E.S.); (A.R.K.)
- Correspondence: ; Tel.: +7-843-233-7363
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Synthesis and anti-pseudomonal activity of new ß-Ala modified analogues of the antimicrobial peptide anoplin. Int J Med Microbiol 2020; 310:151433. [PMID: 32654770 DOI: 10.1016/j.ijmm.2020.151433] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 05/06/2020] [Accepted: 05/23/2020] [Indexed: 12/17/2022] Open
Abstract
Due to the rise of antibiotic-resistant bacteria around the world, AMPs (antimicrobial peptides), depending on non-specific membrane mechanism and low tendency to develop bacterial resistance, attract widespread attentions as novel antimicrobial alternatives for treating bacterial infections. In this study, a series of new β-Ala modified-antimicrobial peptide analogues of anoplin were designed and synthesized, and their biological activities were described. Most of the new peptides showed perfect antimicrobial activities against two antibiotic-sensitive Pseudomonas aeruginosa strains and three clinical isolates of multidrug-resistant P. aeruginosa strains without significant hemolysis or cytotoxicity. More significantly, Ano-1β and Ano-8β (substituting positions 1 and 8 of anoplin with β-Ala, respectively) exhibited the best antimicrobial potency. Additionally, the two new peptides were stable under physiological conditions and displayed preferable in vivo antimicrobial activity with less acute toxicity. Notably, Ano-1β and Ano-8β hardly generated resistance in contrast to conventional antibiotics rifampicin and gentamicin, and they exhibited better anti-biofilm activity and synergistic or additive effects in combination with conventional antibiotics. What's more, Ano-1β and Ano-8β had strong membrane disruption as evidenced by outer membrane permeabilization and cytoplasmic membrane depolarization assays. Confocal laser scanning microscopy and scanning electron microscopy further demonstrated that the two new peptides could destroy the bacterial membrane integrity. Collectively, the incorporation of β-Ala was a reasonable approach for new antimicrobial peptides design, and the new peptides Ano-1β and Ano-8β might be promising antimicrobial candidates in combating the increasing antibiotic-resistant bacteria.
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Yang Y, Wu D, Wang C, Shan A, Bi C, Li Y, Gan W. Hybridization with Insect Cecropin A (1-8) Improve the Stability and Selectivity of Naturally Occurring Peptides. Int J Mol Sci 2020; 21:ijms21041470. [PMID: 32098142 PMCID: PMC7073140 DOI: 10.3390/ijms21041470] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 02/19/2020] [Accepted: 02/19/2020] [Indexed: 12/15/2022] Open
Abstract
Antimicrobial peptides (AMPs) offer great hope and a promising opportunity to overcome the rapid development of drug-resistant pathogenic microbes. However, AMPs often lack the stability required for a successful systemic drug. Hybridizing different AMPs is a simple and effective strategy to obtain novel peptides. N-terminal fragment of cecropin A (CA (1-8)) is often used to hybridize with other AMPs to reduce cytotoxicity. However, hybridizing with CA (1-8) in improving the stability of AMPs is not clear. Therefore, a series of peptides were designed by combining with CA (1–8) and their antibacterial activity and stability in the presence of salts and human serum were evaluated. The resultant α-helical hybrid peptide CA-FO composed of CA (1-8) and the most potent region of Fowlicidin-2 (FO (1–15)) exhibited excellent antibacterial activity (2-8 μM) and cell selectivity toward bacterial over mammalian cells. Moreover, CA-FO still retained vigorous antimicrobial activity in the presence of human serum and salts at physiological concentrations. CA-FO exhibited effective antibacterial activity by increasing membrane permeability and damaging membrane integrity. In conclusion, these results indicated the success of hybridization in designing and optimizing AMPs with improved stability and selectivity and the peptide CA-FO can be further evaluated as peptide-therapy to treat bacterial infections.
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Affiliation(s)
- Yang Yang
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China; (Y.Y.); (D.W.); (C.W.); (C.B.)
| | - Di Wu
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China; (Y.Y.); (D.W.); (C.W.); (C.B.)
| | - Chenxi Wang
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China; (Y.Y.); (D.W.); (C.W.); (C.B.)
| | - Anshan Shan
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China; (Y.Y.); (D.W.); (C.W.); (C.B.)
- Correspondence: ; Tel.: +86-451-5519-0685
| | - Chongpeng Bi
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China; (Y.Y.); (D.W.); (C.W.); (C.B.)
| | - Yanbing Li
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163319, China;
| | - Wenping Gan
- Institute of Animal Husbandry and Veterinary Medicine, Heilongjiang Academy of Land Reclamation Sciences, Harbin 150038, China;
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High Cell Selectivity and Bactericidal Mechanism of Symmetric Peptides Centered on d-Pro-Gly Pairs. Int J Mol Sci 2020; 21:ijms21031140. [PMID: 32046328 PMCID: PMC7037546 DOI: 10.3390/ijms21031140] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 02/02/2020] [Accepted: 02/04/2020] [Indexed: 12/17/2022] Open
Abstract
Antimicrobial peptides (AMPs) have a unique action mechanism that can help to solve global problems in antibiotic resistance. However, their low therapeutic index and poor stability seriously hamper their development as therapeutic agents. In order to overcome these problems, we designed peptides based on the sequence template XXRXXRRzzRRXXRXX-NH2, where X represents a hydrophobic amino acid like Phe (F), Ile (I), and Leu (L), while zz represents Gly-Gly (GG) or d-Pro-Gly (pG). Showing effective antimicrobial activity against Gram-negative bacteria and low toxicity, designed peptides had a tendency to form an α-helical structure in membrane-mimetic environments. Among them, peptide LRpG (X: L, zz: pG) showed the highest geometric mean average treatment index (GMTI = 73.1), better salt, temperature and pH stability, and an additive effect with conventional antibiotics. Peptide LRpG played the role of anti-Gram-negative bacteria through destroying the cell membrane. In addition, peptide LRpG also exhibited an anti-inflammatory activity by effectively neutralizing endotoxin. Briefly, peptide LRpG has the potential to serve as a therapeutic agent to reduce antibiotic resistance owing to its high therapeutic index and great stability.
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Sarkar Y, Roy S, Majumder R, Das S, Bhalani DV, Ray A, Jewrajka SK, Parui PP. Protonation-induced pH increase at the triblock copolymer micelle interface for transient membrane permeability at neutral pH. SOFT MATTER 2020; 16:798-809. [PMID: 31834342 DOI: 10.1039/c9sm01002e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Achieving controlled membrane permeability using pH-responsive block copolymers is crucial for selective intercellular uptake. We have shown that the pH at the triblock-copolymer micelle interface as compared to its bulk pH can help regulate membrane permeability. The pH-dependent acid/base equilibriums of two different interface-interacting pH probes were determined in order to measure the interfacial pH for a pH-responsive triblock copolymer (TBP) micelle under a wide range of bulk pH (4.5-9.0). According to 1H NMR studies, both pH probes provided interfacial pH at a similar interfacial depth. We revealed that the protonation of the amine moiety at the micelle interface and the subsequent formation of a positive charge caused the interface to become relatively less acidic than that of the bulk as well as an increase in the bulk-to-interfacial pH deviation (ΔpH) from ∼0.9 to 1.9 with bulk pH reducing from 8.0 to 4.5. From the ΔpH vs. interface and bulk pH plots, the apparent and intrinsic protonations or positive charge formation pKa values for the micelle were estimated to be ∼7.3 and 6.0, respectively. When the TBP micelle interacted with an anionic large unilamellar vesicle (LUV) of a binary lipid (neutral and anionic) system at the bulk pH of 7.0, fluorescence leakage studies revealed that the pH increase at the micelle interface from that of the LUV interface (pH ∼ 5.5) made the micelle interface partially protonated/cationic, thereby exhibiting transient membrane permeability. Although the increasing interface protonation causes the interface to become relatively less acidic than the bulk at any bulk pH below 6.5, the pH increase at the micelle interface may not be sufficiently large to maintain the threshold for the amine-protonated condition for effecting transient leakage and therefore, a continuous leakage was observed due to the slow disruption of the lipid bilayer.
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Affiliation(s)
- Yeasmin Sarkar
- Department of Chemistry, Jadavpur University, Kolkata 700032, India.
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41
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Chou S, Wang J, Shang L, Akhtar MU, Wang Z, Shi B, Feng X, Shan A. Short, symmetric-helical peptides have narrow-spectrum activity with low resistance potential and high selectivity. Biomater Sci 2019; 7:2394-2409. [PMID: 30919848 DOI: 10.1039/c9bm00044e] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Broad-spectrum antibiotics have, until now, been the mainstay of antibiotic therapy. However, the increasing threat of drug-resistant bacteria and the ecological imbalance of normal microbial communities have forced a reconsideration of the best strategies to treat such pathogens. Therefore, antibacterial agents with specific abilities of eliminating pathogens may provide long-term protection. Antimicrobial peptides (AMPs), which can be optimized by modifying their primary sequences, are regarded as potentially valuable in development of pathogen-specific agents. To obtain efficient narrow-spectrum AMPs, database-filtering technology, which filters the most probable amino acid composition, positive charge, sequence length and hydrophobic content of peptides against Gram-negative bacteria, was taken as the first step. Then, the filtered parameters were distributed and modified into an α-helical symmetrical structure by considering the structure-function relationship of synthesized antimicrobial peptides. Finally, short, safe and stable peptides against Escherichia coli, Salmonella pullorum and Pseudomonas aeruginosa were successfully identified. The potential peptides F1 and F4 showed low cell toxicity, low resistance potential and low salt sensitivity. CD spectroscopy of the peptides illustrated that F1 and F4 exhibited a tendency towards an α-helical structure in a membrane-mimetic environment. Indeed, fluorescence spectroscopy and electron microscopy analyses indicated that the shorter potential sequence F4 killed the bacteria by causing physical destruction of the bacterial membrane and cytosol leakage. In the mouse model test, F4 reduced the bacterial load in major organs and the cytokine (TNF-α, IL-6, and IL-1β) levels in serum significantly (P < 0.05). Collectively, this symmetric-helical distribution, dependent on database-filtering parameters, is a promising strategy for designing effective smart AMPs with high cell selectivity, and it also provides new insights into the design and optimization of pathogen-specific biomaterials.
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Affiliation(s)
- Shuli Chou
- Laboratory of Molecular Nutrition and Immunity, The Institute of Animal Nutrition, Northeast Agricultural University, Harbin, P. R. China.
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Song J, Wang J, Zhan N, Sun T, Yu W, Zhang L, Shan A, Zhang A. Therapeutic Potential of Trp-Rich Engineered Amphiphiles by Single Hydrophobic Amino Acid End-Tagging. ACS APPLIED MATERIALS & INTERFACES 2019; 11:43820-43834. [PMID: 31687796 DOI: 10.1021/acsami.9b12706] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
End-tagging with a single hydrophobic residue contributes to improve the cell selectivity of antimicrobial peptides (AMPs), but systematic studies have been lacking. Thus, this study aimed to systematically investigate how end-tagging with hydrophobic residues at the C-terminus and Gly capped at the N-terminus of W4 (RWRWWWRWR) affects the bioactivity of W4 variants. Among all the hydrophobic residues, only Ala end-tagging improved the antibacterial activity of W4. Meanwhile, Gly capped at the N-terminus could promote the helical propensity of the end-tagged peptides in dodecylphosphocholine micelles, increasing their antimicrobial activities. Of these peptides, GW4A (GRWRWWWRWRA) showed the best antibacterial activity against the 19 species of bacteria tested (GMMIC = 1.86 μM) with low toxicity, thus possessing the highest cell selectivity (TIall = 137.63). It also had rapid sterilization, good salt and serum resistance, and LPS-neutralizing activity. Antibacterial mechanism studies showed that the short peptide GW4A killed bacteria by destroying cell membrane integrity and causing cytoplasmic leakage. Overall, these findings suggested that systematic studies on terminal modifications promoted the development of peptide design theory and provided a potential method for optimization of effective AMPs.
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Affiliation(s)
- Jing Song
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , Heilongjiang , P. R. China
| | - Jiajun Wang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , Heilongjiang , P. R. China
| | - Na Zhan
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , Heilongjiang , P. R. China
| | - Taotao Sun
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , Heilongjiang , P. R. China
| | - Weikang Yu
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , Heilongjiang , P. R. China
| | - Licong Zhang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , Heilongjiang , P. R. China
| | - Anshan Shan
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , Heilongjiang , P. R. China
| | - Aizhong Zhang
- College of Animal Science and Veterinary Medicine , Bayi Agricultural University , Daqing 163000 , Heilongjiang , P. R. China
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Yoon J. Polyphasic analysis in the description of Sulfitobacter salinus sp. nov., a marine alphaproteobacterium isolated from seawater. ANN MICROBIOL 2019. [DOI: 10.1007/s13213-019-01515-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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44
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Zhong C, Liu T, Gou S, He Y, Zhu N, Zhu Y, Wang L, Liu H, Zhang Y, Yao J, Ni J. Design and synthesis of new N-terminal fatty acid modified-antimicrobial peptide analogues with potent in vitro biological activity. Eur J Med Chem 2019; 182:111636. [PMID: 31466017 DOI: 10.1016/j.ejmech.2019.111636] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 08/12/2019] [Accepted: 08/19/2019] [Indexed: 12/25/2022]
Abstract
Developing novel antimicrobial agents is a top priority in fighting against bacterial resistance. Thus, a series of new monomer and dimer peptides were designed and synthesized by conjugating fatty acids at the N-terminus of partial d-amino acid substitution analogues of anoplin and dimerization. The new peptides exhibited more efficient killing of gram-negative and gram-positive bacteria, including methicillin-resistant Staphylococcus aureus compared with the parent peptide anoplin, and the dimer peptides were superior to the monomer peptides. It was important that the new peptides displayed low impact on bacterial resistance development. In addition, the antimicrobial activities were not significantly influenced by a physiological salt environment. They also presented high stability in the presence of protease or serum. Almost all of the new peptides had better selectivity towards anionic bacterial membranes over zwitterionic mammalian cell membranes. Moreover, the new peptides displayed synergistic or additive effects when used together with the antibiotics rifampicin and polymyxin B. These results showed that the new peptides could also prevent the formation of bacterial biofilms. Furthermore, outer/inner membrane permeabilization and cytoplasmic membrane depolarization experiments revealed that the new peptides had strong membrane permeabilization and depolarization. Confocal laser scanning microscopy, flow cytometry analysis and scanning electron microscopy further demonstrated that the new peptides could damage the integrity of the bacterial membrane. Finally, a DNA-binding affinity assay showed that the new peptides could bind to bacterial DNA. In summary, the conjugation of fatty acids at the N-terminus of peptides and dimerization are promising strategies for obtaining potent antimicrobial agents.
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Affiliation(s)
- Chao Zhong
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China; School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Tianqi Liu
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Sanhu Gou
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China; School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Yongtao He
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Ningyi Zhu
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Yuewen Zhu
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Li Wang
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Hui Liu
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Yun Zhang
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Jia Yao
- The First Hospital of Lanzhou University, Lanzhou, 730000, China
| | - Jingman Ni
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China; School of Pharmacy, Lanzhou University, Lanzhou, 730000, China.
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45
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Torres MD, Sothiselvam S, Lu TK, de la Fuente-Nunez C. Peptide Design Principles for Antimicrobial Applications. J Mol Biol 2019; 431:3547-3567. [DOI: 10.1016/j.jmb.2018.12.015] [Citation(s) in RCA: 184] [Impact Index Per Article: 36.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 12/19/2018] [Accepted: 12/22/2018] [Indexed: 02/08/2023]
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46
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Lai Z, Tan P, Zhu Y, Shao C, Shan A, Li L. Highly Stabilized α-Helical Coiled Coils Kill Gram-Negative Bacteria by Multicomplementary Mechanisms under Acidic Condition. ACS APPLIED MATERIALS & INTERFACES 2019; 11:22113-22128. [PMID: 31199117 DOI: 10.1021/acsami.9b04654] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Although antimicrobial peptides (AMPs) hold tremendous promise in overcoming the threats of multidrug resistance, the main obstacle to successful therapeutic applications is their poor stability. Various synthetic strategies such as unnatural amino acids and chemical modifications have made advances for improving this problem. However, this complicated synthesis often greatly increases the cost of production. Here, we show that a series of novel peptides, designed by combining an α-helical coiled coil model, knowledge of the specificity of proteolysis and major parameters of AMPs, exhibited efficient activity against all tested Gram-negative bacteria under acidic condition and demonstrate low toxicity. Of these α-helical coiled coil peptides, 3IH3 displayed the highest average therapeutic index (GMTI = 294.25) with high stability toward salts, serum, extreme pH, heat, and proteases. Electron microscopy and biological analytical technique analyses showed that 3IH3 killed bacterial cells via a multicomplementary mechanism at pH 6.0, with physical membrane disruption as the dominant bactericidal mechanism. These results suggest that 3IH3 shows great stability as an inexpensive and effective antimicrobial activity agent and has the potential for clinical application in the treatment of infections occurring in body sites with acidic pH.
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47
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Ma Z, Zhang R, Hai D, Lu Z, Lv F, Zhao H, Zhang C, McAllister TA, Stanford K, Bie X. Antibiofilm activity and modes of action of a novel β-sheet peptide against multidrug-resistant Salmonella enterica. Food Res Int 2019; 125:108520. [PMID: 31554137 DOI: 10.1016/j.foodres.2019.108520] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 06/13/2019] [Accepted: 06/21/2019] [Indexed: 12/21/2022]
Abstract
S. enterica is an important foodborne pathogen worldwide. As some strains can form biofilms which may offer protection against antimicrobials, it is of interest to explore ways to prevent biofilm formation by S. enterica. In this study, we engineered a short β-sheet peptide WK2 (WKWKCTKSGCKWKW-NH2) and examined its antimicrobial and anti-biofilm activities against various S. enterica strains, including the multidrug-resistant S. Typhimurium DT104. WK2 displayed bacteriostatic activity with a geometric mean (GM) minimum inhibitory concentration (MIC) of 4.17 μg/mL, and bactericidal activity, with a GM lethal concentration (LC) of 7.51 μg/mL. Crystal violet staining and fluorescence measurements demonstrated that WK2 inhibited S. Typhimurium DT104 biofilm formation at 0.5 μg/mL and killed the sessile cells in biofilms at 8 μg/mL. Real-time polymerase chain reaction (qPCR) and microscopic observation revealed that the anti-biofilm activity of WK2 likely arises through the formation of complexes with bacterial DNA, inhibition of surface organelle biosynthesis and interference with autoinducer-2 (AI-2)-mediated quorum sensing (QS). Therefore, WK2 is a promising antimicrobial agent for the prevention and control of biofilms produced by multidrug-resistant S. enterica.
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Affiliation(s)
- Zhi Ma
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Rujing Zhang
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Dan Hai
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Zhaoxin Lu
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Fengxia Lv
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Haizhen Zhao
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Chong Zhang
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Tim A McAllister
- Agriculture and Agri-Food Canada, Lethbridge T1J 4B1, AB, Canada
| | - Kim Stanford
- Alberta Agriculture and Forestry, Lethbridge T1J 4V6, AB, Canada
| | - Xiaomei Bie
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China.
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48
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Yang Z, He S, Wang J, Yang Y, Zhang L, Li Y, Shan A. Rational Design of Short Peptide Variants by Using Kunitzin-RE, an Amphibian-Derived Bioactivity Peptide, for Acquired Potent Broad-Spectrum Antimicrobial and Improved Therapeutic Potential of Commensalism Coinfection of Pathogens. J Med Chem 2019; 62:4586-4605. [PMID: 30958004 DOI: 10.1021/acs.jmedchem.9b00149] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Commensalism coinfection of pathogens has seriously jeopardized human health. Currently, Kunitzin-RE, as an amphibian-derived bioactivity peptide, is regarded as a potential antimicrobial candidate. However, its antimicrobial properties were unsatisfactory. In this study, a set of shortened variants of Kunitzin-RE was developed by the interception of a peptide fragment and single-site mutation to investigate the effect of chain length, positive charge, hydrophobicity, amphipathicity, and secondary structure on antimicrobial properties. Among them, W8 (AARIILRWRFR) significantly broadened the antimicrobial spectrum and showed the highest antimicrobial activity (GMall = 2.48 μM) against all the fungi and bacteria tested. Additionally, W8 showed high cell selectivity and salt tolerance in vitro, whereas it showed high effectiveness against mice keratitis cause by infection by C. albicans 2.2086. Additionally, it also had obviously lipopolysaccharide-binding ability and a potent membrane-disruptive mechanism. Overall, these findings contributed to the design of short antimicrobial peptides and to combat the serious threat of commensalism coinfection of pathogens.
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Affiliation(s)
- Zhanyi Yang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Shiqi He
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Jiajun Wang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Yi Yang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Licong Zhang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Yanbing Li
- College of Animal Science and Veterinary Medicine , Bayi Agricultural University , Daqing 163000 , P. R. China
| | - Anshan Shan
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
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49
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Jangra M, Kaur M, Nandanwar H. In-vitro studies on a natural lantibiotic, paenibacillin: A new-generation antibacterial drug candidate to overcome multi-drug resistance. Int J Antimicrob Agents 2019; 53:838-843. [PMID: 30928682 DOI: 10.1016/j.ijantimicag.2019.03.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 03/21/2019] [Accepted: 03/25/2019] [Indexed: 11/16/2022]
Abstract
The alarming burden of antibiotic resistance in nosocomial pathogens warrants the discovery and development of new and effective antimicrobial compounds. Small cationic antimicrobial peptides seem to be a promising therapeutic alternative to fight multi-drug resistance. This study investigated the in-vitro potential of a previously reported lantibiotic, paenibacillin, from the clinical perspective. An antimicrobial peptide, M152-P4, was isolated, purified and characterized from a mud isolate, and its susceptibility was determined in clinical isolates of Staphylococcus aureus and Enterococcus spp. Time-kill kinetics, resistance, probable mode of action, haemolytic activity and mammalian cytotoxicity were investigated. M152-P4 was identified as paenibacillin based on mass spectroscopy data, amino acid analysis and biosynthetic gene cluster analysis. It had potent antibacterial activity against the Gram-positive pathogens tested, with minimum inhibitory concentrations from 0.1 to 1.56 µM. It appeared very challenging for S. aureus to develop resistance to this compound. Also, paenibacillin penetrated the outer layer of bacteria, and depolarized the membrane completely by creating pores in the plasma membrane with better potential than nisin. Paenibacillin showed no haemolysis up to 60 µM, and the half maximal inhibitory concentration on mammalian cell lines was >100 µM. These results highlight the excellent antibacterial properties of paenibacillin in clinically relevant pathogens. It is stable in the presence of serum, and non-haemolytic and non-cytotoxic even above the therapeutic concentration. Further research efforts regarding toxicity and in-vivo efficacy are necessary to develop paenibacillin as a next-generation therapeutic drug to overcome multi-drug resistance in Gram-positive pathogens.
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Affiliation(s)
- Manoj Jangra
- Clinical Microbiology and Bioactive Screening Laboratory, Council of Scientific and Industrial Research - Institute of Microbial Technology, Chandigarh, India
| | - Manpreet Kaur
- Clinical Microbiology and Bioactive Screening Laboratory, Council of Scientific and Industrial Research - Institute of Microbial Technology, Chandigarh, India
| | - Hemraj Nandanwar
- Clinical Microbiology and Bioactive Screening Laboratory, Council of Scientific and Industrial Research - Institute of Microbial Technology, Chandigarh, India.
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50
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Wang J, Song J, Yang Z, He S, Yang Y, Feng X, Dou X, Shan A. Antimicrobial Peptides with High Proteolytic Resistance for Combating Gram-Negative Bacteria. J Med Chem 2019; 62:2286-2304. [PMID: 30742437 DOI: 10.1021/acs.jmedchem.8b01348] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Poor proteolytic resistance is an urgent problem to be solved in the clinical application of antimicrobial peptides (AMPs), yet common solutions, such as complicated chemical modifications and utilization of d-amino acids, greatly increase the difficulty and cost of producing AMPs. In this work, a set of novel peptides was synthesized based on an antitrypsin/antichymotrypsin hydrolytic peptide structure unit (XYPX) n (X represents I, L, and V; Y represents R and K), which was designed using a systematic natural amino acid arrangement. Of these peptides, 16 with seven repeat units had the highest average selectivity index (GMSI = 99.07) for all of the Gram-negative bacteria tested and remained highly effective in combating Escherichia coli infection in vivo. Importantly, 16 also had dramatic resistance to a high concentration of trypsin/chymotrypsin hydrolysis and exerted bactericidal activity through a membrane-disruptive mechanism. Overall, these findings provide new approaches for the development of antiprotease hydrolytic peptides that target Gram-negative bacteria.
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Affiliation(s)
- Jiajun Wang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Jing Song
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Zhanyi Yang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Shiqi He
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Yi Yang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Xingjun Feng
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Xiujing Dou
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Anshan Shan
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
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