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Larwood DJ, Stevens DA. Antifungal Activity of Brilacidin, a Nonpeptide Host Defense Molecule. Antibiotics (Basel) 2024; 13:405. [PMID: 38786134 PMCID: PMC11117233 DOI: 10.3390/antibiotics13050405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 04/16/2024] [Accepted: 04/17/2024] [Indexed: 05/25/2024] Open
Abstract
Natural host defensins, also sometimes termed antimicrobial peptides, are evolutionarily conserved. They have been studied as antimicrobials, but some pharmaceutical properties, undesirable for clinical use, have led to the development of synthetic molecules with constructed peptide arrangements and/or peptides not found in nature. The leading development currently is synthetic small-molecule nonpeptide mimetics, whose physical properties capture the characteristics of the natural molecules and share their biological attributes. We studied brilacidin, an arylamide of this type, for its activity in vitro against fungi (40 clinical isolates, 20 species) that the World Health Organization has highlighted as problem human pathogens. We found antifungal activity at low concentrations for many pathogens, which indicates that further screening for activity, particularly in vivo, is justified to evaluate this compound, and other mimetics, as attractive leads for the development of effective antifungal agents.
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Affiliation(s)
- David J. Larwood
- Department of Pharmaceutical Chemistry, University of California-San Francisco, San Francisco, CA 94158, USA;
- California Institute for Medical Research, San Jose, CA 95128, USA
- Valley Fever Solutions, Tucson, AZ 85719, USA
| | - David A. Stevens
- California Institute for Medical Research, San Jose, CA 95128, USA
- Division of Infectious Diseases and Geographic Medicine, Stanford University Medical School, Stanford, CA 94305, USA
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2
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dos Reis TF, Diehl C, Pinzan CF, de Castro PA, Goldman GH. Brilacidin, a host defense peptide mimetic, potentiates ibrexafungerp antifungal activity against the human pathogenic fungus Aspergillus fumigatus. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.05.588305. [PMID: 38617338 PMCID: PMC11014541 DOI: 10.1101/2024.04.05.588305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
Aspergillus fumigatus is the primary etiological agent of aspergillosis. Here, we show that the host defense peptide mimetic, brilacidin (BRI) can potentiate ibrexafungerp (IBX) against clinical isolates of A. fumigatus. CAS-resistant strains with mutations in fks1 that encodes the 1,3-β-D-glucan synthase are not IBX-resistant and BRI+IBX can inhibit their growth. The combination of BRI+IBX plays a fungicidal role, increases the fungal cell permeability and decreases the fungal survival in the presence of A549 epithelial cells.
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Affiliation(s)
- Thaila Fernanda dos Reis
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Camila Diehl
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Camila Figueiredo Pinzan
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Patrícia Alves de Castro
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Gustavo H. Goldman
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
- National Institute of Science and Technology in Human Pathogenic Fungi, Brazil
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3
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Dos Reis TF, de Castro PA, Bastos RW, Pinzan CF, Souza PFN, Ackloo S, Hossain MA, Drewry DH, Alkhazraji S, Ibrahim AS, Jo H, Lightfoot JD, Adams EM, Fuller KK, deGrado WF, Goldman GH. A host defense peptide mimetic, brilacidin, potentiates caspofungin antifungal activity against human pathogenic fungi. Nat Commun 2023; 14:2052. [PMID: 37045836 PMCID: PMC10090755 DOI: 10.1038/s41467-023-37573-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 03/23/2023] [Indexed: 04/14/2023] Open
Abstract
Fungal infections cause more than 1.5 million deaths a year. Due to emerging antifungal drug resistance, novel strategies are urgently needed to combat life-threatening fungal diseases. Here, we identify the host defense peptide mimetic, brilacidin (BRI) as a synergizer with caspofungin (CAS) against CAS-sensitive and CAS-resistant isolates of Aspergillus fumigatus, Candida albicans, C. auris, and CAS-intrinsically resistant Cryptococcus neoformans. BRI also potentiates azoles against A. fumigatus and several Mucorales fungi. BRI acts in A. fumigatus by affecting cell wall integrity pathway and cell membrane potential. BRI combined with CAS significantly clears A. fumigatus lung infection in an immunosuppressed murine model of invasive pulmonary aspergillosis. BRI alone also decreases A. fumigatus fungal burden and ablates disease development in a murine model of fungal keratitis. Our results indicate that combinations of BRI and antifungal drugs in clinical use are likely to improve the treatment outcome of aspergillosis and other fungal infections.
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Affiliation(s)
- Thaila Fernanda Dos Reis
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Patrícia Alves de Castro
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Rafael Wesley Bastos
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Camila Figueiredo Pinzan
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Pedro F N Souza
- Visiting professor at Drug Research and Development Center, Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza, Ceará, 60451, Brazil
| | - Suzanne Ackloo
- Structural Genomics Consortium, University of Toronto, 101 College Street, MaRS South Tower, Suite 700, Toronto, ON, M5G 1L7, Canada
| | - Mohammad Anwar Hossain
- Structural Genomics Consortium, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - David Harold Drewry
- Structural Genomics Consortium, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Lineberger Comprehensive Cancer Center, Department of Medicine, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Sondus Alkhazraji
- Division of Infectious Diseases, The Lundquist Institute for Biomedical Innovation at Harbor-University of California Los Angeles (UCLA) Medical Center, Torrance, CA, 90502, USA
| | - Ashraf S Ibrahim
- Division of Infectious Diseases, The Lundquist Institute for Biomedical Innovation at Harbor-University of California Los Angeles (UCLA) Medical Center, Torrance, CA, 90502, USA
- David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095, USA
| | - Hyunil Jo
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA, 94143, USA
| | - Jorge D Lightfoot
- Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
| | - Emily M Adams
- Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
| | - Kevin K Fuller
- Department of Ophthalmology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, 73104, USA
| | - William F deGrado
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, CA, 94143, USA
| | - Gustavo H Goldman
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil.
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4
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Kamilar E, Bariwal J, Zheng W, Ma H, Liang H. SMALPs Are Not Simply Nanodiscs: The Polymer-to-Lipid Ratios of Fractionated SMALPs Underline Their Heterogeneous Nature. Biomacromolecules 2023; 24:1819-1838. [PMID: 36947865 DOI: 10.1021/acs.biomac.3c00034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2023]
Abstract
Amphipathic styrene-maleic acid (SMA) copolymers directly solubilize biomembranes into SMA-lipid particles, or SMALPs, that are often regarded as nanodiscs and hailed as a native membrane platform. The promising outlook of SMALPs inspires the discovery of many SMA-like copolymers that also solubilize biomembranes into putative nanodiscs, but a fundamental question remains on how much the SMALPs or SMALP analogues truly resemble the bilayer structure of nanodiscs. This unfortunate ambiguity undermines the utility of SMA or SMA-like copolymers in membrane biology because the structure and function of many membrane proteins depend critically on their surrounding matrices. Here, we report the structural heterogeneity of SMALPs revealed through fractionating SMALPs comprised of lipids and well-defined SMAs via size-exclusion chromatography followed by quantitative determination of the polymer-to-lipid (P/L) stoichiometric ratios in individual fractions. Through the lens of P/L stoichiometric ratios, different self-assembled polymer-lipid nanostructures are inferred, such as polymer-remodeled liposomes, polymer-encased nanodiscs, polymer-lipid mixed micelles, and lipid-doped polymer micellar aggregates. We attribute the structural heterogeneity of SMALPs to the microstructure variations amongst individual polymer chains that give rise to their polydisperse detergency. As an example, we demonstrate that SMAs with a similar S/MA ratio but different chain sizes participate preferentially in different polymer-lipid nanostructures. We further demonstrate that proteorhodopsin, a light-driven proton pump solubilized within the same SMALPs is distributed amongst different self-assembled nanostructures to display different photocycle kinetics. Our discovery challenges the native nanodisc notion of SMALPs or SMALP analogues and highlights the necessity to separate and identify the structurally dissimilar polymer-lipid particles in membrane biology studies.
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Affiliation(s)
- Elizabeth Kamilar
- Department of Cell Physiology & Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Jitender Bariwal
- Department of Cell Physiology & Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Wan Zheng
- Department of Cell Physiology & Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Hairong Ma
- Department of Cell Physiology & Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Hongjun Liang
- Department of Cell Physiology & Molecular Biophysics, Center for Membrane Protein Research, School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
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5
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Alves D, Grainha T, Pereira MO, Lopes SP. Antimicrobial materials for endotracheal tubes: A review on the last two decades of technological progress. Acta Biomater 2023; 158:32-55. [PMID: 36632877 DOI: 10.1016/j.actbio.2023.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 12/21/2022] [Accepted: 01/03/2023] [Indexed: 01/11/2023]
Abstract
Ventilator-associated pneumonia (VAP) is an unresolved problem in nosocomial settings, remaining consistently associated with a lack of treatment, high mortality, and prolonged hospital stay. The endotracheal tube (ETT) is the major culprit for VAP development owing to its early surface microbial colonization and biofilm formation by multiple pathogens, both critical events for VAP pathogenesis and relapses. To combat this matter, gradual research on antimicrobial ETT surface coating/modification approaches has been made. This review provides an overview of the relevance and implications of the ETT bioburden for VAP pathogenesis and how technological research on antimicrobial materials for ETTs has evolved. Firstly, certain main VAP attributes (definition/categorization; outcomes; economic impact) were outlined, highlighting the issues in defining/diagnosing VAP that often difficult VAP early- and late-onset differentiation, and that generate misinterpretations in VAP surveillance and discrepant outcomes. The central role of the ETT microbial colonization and subsequent biofilm formation as fundamental contributors to VAP pathogenesis was then underscored, in parallel with the uncovering of the polymicrobial ecosystem of VAP-related infections. Secondly, the latest technological developments (reported since 2002) on materials able to endow the ETT surface with active antimicrobial and/or passive antifouling properties were annotated, being further subject to critical scrutiny concerning their potentialities and/or constraints in reducing ETT bioburden and the risk of VAP while retaining/improving the safety of use. Taking those gaps/challenges into consideration, we discussed potential avenues that may assist upcoming advances in the field to tackle VAP rampant rates and improve patient care. STATEMENT OF SIGNIFICANCE: The use of the endotracheal tube (ETT) in patients requiring mechanical ventilation is associated with the development of ventilator-associated pneumonia (VAP). Its rapid surface colonization and biofilm formation are critical events for VAP pathogenesis and relapses. This review provides a comprehensive overview on the relevance/implications of the ETT biofilm in VAP, and on how research on antimicrobial ETT surface coating/modification technology has evolved over the last two decades. Despite significant technological advances, the limited number of gathered reports (46), highlights difficulty in overcoming certain hurdles associated with VAP (e.g., persistent colonization/biofilm formation; mechanical ventilation duration; hospital length of stay; VAP occurrence), which makes this an evolving, complex, and challenging matter. Challenges and opportunities in the field are discussed.
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Affiliation(s)
- Diana Alves
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal; LABBELS - Associate Laboratory, Braga/Guimarães, Portugal.
| | - Tânia Grainha
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal; LABBELS - Associate Laboratory, Braga/Guimarães, Portugal.
| | - Maria Olívia Pereira
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal; LABBELS - Associate Laboratory, Braga/Guimarães, Portugal.
| | - Susana Patrícia Lopes
- CEB - Centre of Biological Engineering, University of Minho, 4710-057 Braga, Portugal; LABBELS - Associate Laboratory, Braga/Guimarães, Portugal.
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Bioengineering Approaches to Fight against Orthopedic Biomaterials Related-Infections. Int J Mol Sci 2022; 23:ijms231911658. [PMID: 36232956 PMCID: PMC9569980 DOI: 10.3390/ijms231911658] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/24/2022] [Accepted: 09/26/2022] [Indexed: 11/07/2022] Open
Abstract
One of the most serious complications following the implantation of orthopedic biomaterials is the development of infection. Orthopedic implant-related infections do not only entail clinical problems and patient suffering, but also cause a burden on healthcare care systems. Additionally, the ageing of the world population, in particular in developed countries, has led to an increase in the population above 60 years. This is a significantly vulnerable population segment insofar as biomaterials use is concerned. Implanted materials are highly susceptible to bacterial and fungal colonization and the consequent infection. These microorganisms are often opportunistic, taking advantage of the weakening of the body defenses at the implant surface–tissue interface to attach to tissues or implant surfaces, instigating biofilm formation and subsequent development of infection. The establishment of biofilm leads to tissue destruction, systemic dissemination of the pathogen, and dysfunction of the implant/bone joint, leading to implant failure. Moreover, the contaminated implant can be a reservoir for infection of the surrounding tissue where microorganisms are protected. Therefore, the biofilm increases the pathogenesis of infection since that structure offers protection against host defenses and antimicrobial therapies. Additionally, the rapid emergence of bacterial strains resistant to antibiotics prompted the development of new alternative approaches to prevent and control implant-related infections. Several concepts and approaches have been developed to obtain biomaterials endowed with anti-infective properties. In this review, several anti-infective strategies based on biomaterial engineering are described and discussed in terms of design and fabrication, mechanisms of action, benefits, and drawbacks for preventing and treating orthopaedic biomaterials-related infections.
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Pham P, Oliver S, Nguyen DT, Boyer C. Effect of Cationic Groups on the Selectivity of Ternary Antimicrobial Polymers. Macromol Rapid Commun 2022; 43:e2200377. [PMID: 35894165 DOI: 10.1002/marc.202200377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 07/07/2022] [Indexed: 12/16/2022]
Abstract
Antimicrobial polymers (AMPs) have emerged as a promising approach to combat multidrug-resistant pathogens. Developed from binary polymers, which contain cationic and hydrophobic groups, ternary polymers are enhanced by adding neutral hydrophilic monomers to improve their biocompatibility. Cationic groups have attracted significant attention owing to their pivotal role in AMPs. Although many studies have investigated the effect of cationic groups on antimicrobial activity of binary AMPs, there is a lack of comprehensive and systematic evaluation for ternary AMPs. Therefore, a library of 31 statistical amphiphilic ternary polymers containing different cationic groups, including primary amine, guanidine and sulfonium groups was prepared to investigate the impact of cationic groups on antimicrobial activity and biocompatibility. We show that the cationic balance appears to be a critical factor influencing polymers' antibacterial activity and selectivity. Our results reveal that the polymers that have the ratio of the cationic groups ranging between 50-60%, coupled with a cationic/hydrophobic ratio in the range of [1.4-2] and an appropriate neutral hydrophilic/hydrophobic balance, exhibited the highest selectivity toward mammalian cells. Furthermore, selectivity can be improved with suitable cationic moieties and good neutral hydrophilic candidates. In the present study, a lysine-mimicking monomer and PEG chain were the best choices for cationic and hydrophilic sources to develop the most selective AMPs, displaying an impressive selectivity for HC50 and IC50 greater than 83 and 21, respectively. This study elucidates a structure-property-performance relationship for ternary AMPs, which contributes to the development of AMPs capable of selectively targeting gram-negative pathogens. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Phuong Pham
- Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Susan Oliver
- Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Duong Thanh Nguyen
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, 100000, Vietnam
| | - Cyrille Boyer
- Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia
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Do Pham DD, Mojr V, Helusová M, Mikušová G, Pohl R, Dávidová E, Šanderová H, Vítovská D, Bogdanová K, Večeřová R, Sedláková MH, Fišer R, Sudzinová P, Pospíšil J, Benada O, Křížek T, Galandáková A, Kolář M, Krásný L, Rejman D. LEGO-Lipophosphonoxins: A Novel Approach in Designing Membrane Targeting Antimicrobials. J Med Chem 2022; 65:10045-10078. [PMID: 35839126 PMCID: PMC9580004 DOI: 10.1021/acs.jmedchem.2c00684] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
The alarming rise of bacterial antibiotic resistance
requires the
development of new compounds. Such compounds, lipophosphonoxins (LPPOs),
were previously reported to be active against numerous bacterial species,
but serum albumins abolished their activity. Here we describe the
synthesis and evaluation of novel antibacterial compounds termed LEGO-LPPOs,
loosely based on LPPOs, consisting of a central linker module with
two attached connector modules on either side. The connector modules
are then decorated with polar and hydrophobic modules. We performed
an extensive structure–activity relationship study by varying
the length of the linker and hydrophobic modules. The best compounds
were active against both Gram-negative and Gram-positive species including
multiresistant strains and persisters. LEGO-LPPOs act by first depleting
the membrane potential and then creating pores in the cytoplasmic
membrane. Importantly, their efficacy is not affected by the presence
of serum albumins. Low cytotoxicity and low propensity for resistance
development demonstrate their potential for therapeutic use.
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Affiliation(s)
- Duy Dinh Do Pham
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Viktor Mojr
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Michaela Helusová
- Department of Genetics and Microbiology, Faculty of Science, Charles University, Viničná 5, 128 43 Prague 2, Czech Republic
| | - Gabriela Mikušová
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic.,Department of Genetics and Microbiology, Faculty of Science, Charles University, Viničná 5, 128 43 Prague 2, Czech Republic
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Eva Dávidová
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
| | - Hana Šanderová
- Institute of Microbiology, Czech Academy of Sciences v.v.i., Vídečská 1083, 142 20 Prague 4, Czech Republic
| | - Dragana Vítovská
- Institute of Microbiology, Czech Academy of Sciences v.v.i., Vídečská 1083, 142 20 Prague 4, Czech Republic
| | - Kateřina Bogdanová
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 3, 775 15 Olomouc, Czech Republic
| | - Renata Večeřová
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 3, 775 15 Olomouc, Czech Republic
| | - Miroslava Htoutou Sedláková
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 3, 775 15 Olomouc, Czech Republic
| | - Radovan Fišer
- Department of Genetics and Microbiology, Faculty of Science, Charles University, Viničná 5, 128 43 Prague 2, Czech Republic
| | - Petra Sudzinová
- Institute of Microbiology, Czech Academy of Sciences v.v.i., Vídečská 1083, 142 20 Prague 4, Czech Republic
| | - Jiří Pospíšil
- Institute of Microbiology, Czech Academy of Sciences v.v.i., Vídečská 1083, 142 20 Prague 4, Czech Republic
| | - Oldřich Benada
- Institute of Microbiology, Czech Academy of Sciences v.v.i., Vídečská 1083, 142 20 Prague 4, Czech Republic
| | - Tomáš Křížek
- Department of Analytical Chemistry, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic
| | - Adéla Galandáková
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 3, 775 15 Olomouc, Czech Republic
| | - Milan Kolář
- Department of Microbiology, Faculty of Medicine and Dentistry, Palacký University Olomouc, Hněvotínská 3, 775 15 Olomouc, Czech Republic
| | - Libor Krásný
- Institute of Microbiology, Czech Academy of Sciences v.v.i., Vídečská 1083, 142 20 Prague 4, Czech Republic
| | - Dominik Rejman
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences v.v.i., Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
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Wang Y, Wu P, Liu F, Chen J, Xue J, Qin Y, Chen F, Wang S, Ji L. Design, synthesis, and biological evaluation of membrane-active honokiol derivatives as potent antibacterial agents. Eur J Med Chem 2022; 240:114593. [PMID: 35820350 DOI: 10.1016/j.ejmech.2022.114593] [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: 04/17/2022] [Revised: 06/27/2022] [Accepted: 07/04/2022] [Indexed: 11/19/2022]
Abstract
Infections caused by drug-resistant bacteria have emerged to be one of the greatest threats to global public health, and new antimicrobial agents with novel mechanisms of action hence are in an urgent need to combat bacterial resistance. Herein, we reported the design, synthesis, and antibacterial evaluation of novel honokiol derivatives as mimics of antimicrobial peptides (AMPs). These mimics showed potent antimicrobial properties against Gram-positive bacteria. Among them, the most promising compound 13b exhibited excellent antibacterial activity, rapid bactericidal properties, avoidance of antibiotic resistance, and weak hemolytic and cytotoxic activities. In addition, compound 13b not only inhibited the biofilm formation but also destroy the preformed biofilm. Mechanism studies further revealed that compound 13b killed bacteria rapidly by interrupting the bacterial membrane. More intriguingly, compound 13b exhibited potent in vivo antibacterial efficacy in a mouse septicemia model induced by Staphylococcus aureus ATCC43300. These results highlight the potential of 13b to be used as therapeutic agents.
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Affiliation(s)
- Yinhu Wang
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China.
| | - Ping Wu
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
| | - Fangquan Liu
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
| | - Junjie Chen
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
| | - Jie Xue
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
| | - Yinhui Qin
- Department of Pharmacy, Henan Provincial People's Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, 450003, Henan, China
| | - Fang Chen
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China
| | - Shuo Wang
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China.
| | - Lusha Ji
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng, China.
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10
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Zober M, Lienkamp K. “Just Antimicrobial Is Not Enough” Revisited – From Antimicrobial Polymers To Microstructured Dual‐Functional Surfaces, Self‐regenerating Polymer Surfaces, and Polymer Materials with Switchable Bioactivity. MACROMOL CHEM PHYS 2022. [DOI: 10.1002/macp.202200051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Maria Zober
- Department of Microsystems Engineering (IMTEK) University of Freiburg Georges‐Köhler‐Allee 105 79110 Freiburg Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) University of Freiburg Georges‐Köhler‐Allee 105 79110 Freiburg Germany
| | - Karen Lienkamp
- Department of Microsystems Engineering (IMTEK) University of Freiburg Georges‐Köhler‐Allee 105 79110 Freiburg Germany
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) University of Freiburg Georges‐Köhler‐Allee 105 79110 Freiburg Germany
- Professur für Polymerwerkstoffe Fachrichtung Materialwissenschaft und Werkstoffkunde Universität des Saarlandes Campus 66123 Saarbrücken Germany
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11
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Shen C, Lin Y, Mohammadi TN, Masuda Y, Honjoh KI, Miyamoto T. Characterization of novel antimicrobial peptides designed on the basis of amino acid sequence of peptides from egg white hydrolysate. Int J Food Microbiol 2022; 378:109802. [PMID: 35752018 DOI: 10.1016/j.ijfoodmicro.2022.109802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 06/07/2022] [Accepted: 06/12/2022] [Indexed: 10/18/2022]
Abstract
Salmonella enterica subsp. enterica serotype Typhimurium (S. Typhimurium) is one of the most prevalent foodborne pathogens responsible for food poisoning and is spread through the consumption of contaminated poultry products. In this study, four antimicrobial peptides (AMPs) with varying hydrophobicity and helical structure-forming tendencies were designed and synthesized based on the amino acid sequences of peptides from egg white hydrolysate. Two of these AMPs, P1R3 (KSWKKHVVSGFFLR) and P1C (KSWKKHVVSGFFLRLWVHKK), exhibited inhibitory activity against S. Typhimurium and compromised its biofilm-forming ability. Investigation of their modes of action revealed that P1R3 and P1C interact with and permeabilize the cytoplasmic membrane of bacteria, leading to membrane potential dissipation, damage to membrane integrity, and consequent bacterial death. P1R3 also bound to S. Typhimurium DNA, resulting in DNA aggregation or precipitation. Moreover, both peptides showed negligible cytotoxicity to Vero cells, and P1C displayed significant antimicrobial activity in chicken meat. Peptides P1R3 and P1C, therefore, have the potential to be developed as promising food preservatives, especially against pathogenic S. Typhimurium.
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Affiliation(s)
- Cunkuan Shen
- College of Biological and Environmental Science, Zhejiang Wanli University, Ningbo, Zhejiang 315100, China; Department of Bioscience and Biotechnology, Graduate School of Bioscience and Bioenvironmental Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yunzhi Lin
- Department of Bioscience and Biotechnology, Graduate School of Bioscience and Bioenvironmental Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Tahir Noor Mohammadi
- Department of Bioscience and Biotechnology, Graduate School of Bioscience and Bioenvironmental Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yoshimitsu Masuda
- Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Ken-Ichi Honjoh
- Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Takahisa Miyamoto
- Department of Bioscience and Biotechnology, Faculty of Agriculture, Graduate School, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
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12
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Svenson J, Molchanova N, Schroeder CI. Antimicrobial Peptide Mimics for Clinical Use: Does Size Matter? Front Immunol 2022; 13:915368. [PMID: 35720375 PMCID: PMC9204644 DOI: 10.3389/fimmu.2022.915368] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Accepted: 04/29/2022] [Indexed: 11/13/2022] Open
Abstract
The search for efficient antimicrobial therapies that can alleviate suffering caused by infections from resistant bacteria is more urgent than ever before. Infections caused by multi-resistant pathogens represent a significant and increasing burden to healthcare and society and researcher are investigating new classes of bioactive compounds to slow down this development. Antimicrobial peptides from the innate immune system represent one promising class that offers a potential solution to the antibiotic resistance problem due to their mode of action on the microbial membranes. However, challenges associated with pharmacokinetics, bioavailability and off-target toxicity are slowing down the advancement and use of innate defensive peptides. Improving the therapeutic properties of these peptides is a strategy for reducing the clinical limitations and synthetic mimics of antimicrobial peptides are emerging as a promising class of molecules for a variety of antimicrobial applications. These compounds can be made significantly shorter while maintaining, or even improving antimicrobial properties, and several downsized synthetic mimics are now in clinical development for a range of infectious diseases. A variety of strategies can be employed to prepare these small compounds and this review describes the different compounds developed to date by adhering to a minimum pharmacophore based on an amphiphilic balance between cationic charge and hydrophobicity. These compounds can be made as small as dipeptides, circumventing the need for large compounds with elaborate three-dimensional structures to generate simplified and potent antimicrobial mimics for a range of medical applications. This review highlight key and recent development in the field of small antimicrobial peptide mimics as a promising class of antimicrobials, illustrating just how small you can go.
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Affiliation(s)
| | - Natalia Molchanova
- The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Christina I. Schroeder
- Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD, United States
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13
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Luong HX, Ngan HD, Thi Phuong HB, Quoc TN, Tung TT. Multiple roles of ribosomal antimicrobial peptides in tackling global antimicrobial resistance. ROYAL SOCIETY OPEN SCIENCE 2022; 9:211583. [PMID: 35116161 PMCID: PMC8790363 DOI: 10.1098/rsos.211583] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 12/20/2021] [Indexed: 05/03/2023]
Abstract
In the last century, conventional antibiotics have played a significant role in global healthcare. Antibiotics support the body in controlling bacterial infection and simultaneously increase the tendency of drug resistance. Consequently, there is a severe concern regarding the regression of the antibiotic era. Despite the use of antibiotics, host defence systems are vital in fighting infectious diseases. In fact, the expression of ribosomal antimicrobial peptides (AMPs) has been crucial in the evolution of innate host defences and has been irreplaceable to date. Therefore, this valuable source is considered to have great potential in tackling the antimicrobial resistance (AMR) crisis. Furthermore, the possibility of bacterial resistance to AMPs has been intensively investigated. Here, we summarize all aspects related to the multiple applications of ribosomal AMPs and their derivatives in combating AMR.
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Affiliation(s)
- Huy Xuan Luong
- Faculty of Pharmacy, PHENIKAA University, Hanoi 12116, Vietnam
- PHENIKAA Institute for Advanced Study (PIAS), PHENIKAA University, Hanoi 12116, Vietnam
| | | | | | - Thang Nguyen Quoc
- Nuclear Medicine Unit, Vinmec Healthcare System, Hanoi 10000, Vietnam
| | - Truong Thanh Tung
- Faculty of Pharmacy, PHENIKAA University, Hanoi 12116, Vietnam
- PHENIKAA Institute for Advanced Study (PIAS), PHENIKAA University, Hanoi 12116, Vietnam
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14
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Kratochvil HT, Newberry RW, Mensa B, Mravic M, DeGrado WF. Spiers Memorial Lecture: Analysis and de novo design of membrane-interactive peptides. Faraday Discuss 2021; 232:9-48. [PMID: 34693965 PMCID: PMC8979563 DOI: 10.1039/d1fd00061f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Membrane-peptide interactions play critical roles in many cellular and organismic functions, including protection from infection, remodeling of membranes, signaling, and ion transport. Peptides interact with membranes in a variety of ways: some associate with membrane surfaces in either intrinsically disordered conformations or well-defined secondary structures. Peptides with sufficient hydrophobicity can also insert vertically as transmembrane monomers, and many associate further into membrane-spanning helical bundles. Indeed, some peptides progress through each of these stages in the process of forming oligomeric bundles. In each case, the structure of the peptide and the membrane represent a delicate balance between peptide-membrane and peptide-peptide interactions. We will review this literature from the perspective of several biologically important systems, including antimicrobial peptides and their mimics, α-synuclein, receptor tyrosine kinases, and ion channels. We also discuss the use of de novo design to construct models to test our understanding of the underlying principles and to provide useful leads for pharmaceutical intervention of diseases.
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Affiliation(s)
- Huong T Kratochvil
- Department of Pharmaceutical Chemistry, University of California - San Francisco, San Francisco, CA 94158, USA.
| | - Robert W Newberry
- Department of Pharmaceutical Chemistry, University of California - San Francisco, San Francisco, CA 94158, USA.
| | - Bruk Mensa
- Department of Pharmaceutical Chemistry, University of California - San Francisco, San Francisco, CA 94158, USA.
| | - Marco Mravic
- Department of Integrative Structural and Computational Biology, Scripps Research Institute, La Jolla, CA 92037, USA
| | - William F DeGrado
- Department of Pharmaceutical Chemistry, University of California - San Francisco, San Francisco, CA 94158, USA.
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15
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Rational design and synthesis of Oreoch-2 analogues as efficient broad-spectrum antimicrobial peptides. Bioorg Chem 2021; 119:105583. [PMID: 34971943 DOI: 10.1016/j.bioorg.2021.105583] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 12/18/2021] [Accepted: 12/21/2021] [Indexed: 12/28/2022]
Abstract
In recent years, bacterial resistance has risen sharply, which seriously endangers public health due to the abuse of antibiotics and the lack of new antibiotics. Therefore, there is an urgent need for new antimicrobial agents to combat multidrug-resistant (MDR) bacterial infections. In this paper, six Oreoch-2 analogues were rationally designed and efficiently synthesized by using the truncation strategy with Oreoch-2 as the lead compound. Evaluation of these analogues against a panel of Gram-positive and Gram-negative bacteria including MDR strains was performed. Among them, ZN-5 and ZN-6 were identified to be broad-spectrum effective analogues, which were superior to their parent peptide Oreoch-2. In addition, ZN-5 and ZN-6 had good stability to the physiological environment, and much higher selectivity to bacterial cells than to mammalian cells. Time-kill kinetics and transmission electron microscope (TEM) studies suggested that these analogues were typical bactericidal agents and quickly eliminated bacteria in a bactericidal mode by disrupting bacterial cell membrane. Moreover, ZN-5 and ZN-6 could inhibit biofilm formation of Staphylococcus aureus ATCC25923. Compared with their parent peptide Oreoch-2, ZN-5 and ZN-6 not only possessed shortened peptide chains, but also showed slightly improved antibacterial activity and greatly reduced hemolysis. This indicates that they are ideal lead compounds of antimicrobial peptides, which can be developed as substitutes for traditional antibiotics.
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16
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Chen Y, Li H, Liu J, Zhong R, Li H, Fang S, Liu S, Lin S. Synthesis and biological evaluation of indole-based peptidomimetics as antibacterial agents against Gram-positive bacteria. Eur J Med Chem 2021; 226:113813. [PMID: 34520955 DOI: 10.1016/j.ejmech.2021.113813] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 08/15/2021] [Accepted: 08/28/2021] [Indexed: 01/06/2023]
Abstract
The emergence of bacterial multidrug resistance and the lack of new antimicrobial agents urgently demand the discovery and development of novel antibacterials that avoid bacterial resistance. Antimicrobial peptidomimetics represent a promising approach for overcoming antibiotic resistance. Herein we report the synthesis and evaluation of indole-based amphiphilic antimicrobial peptidomimetics, bearing hydrophobic side chains and hydrophilic cationic moieties. Among these derivatives, compound 28 demonstrated potent antimicrobial activity against Gram-positive bacteria, low hemolytic activity and low toxicity towards mammalian cells, as well as good stability in salt conditions. Moreover, compound 28 showed the rapid killing of bacteria via membrane-targeting action without developing bacterial resistance. More importantly, compound 28 displayed high antimicrobial potency against Gram-positive bacteria in a murine model of bacterial keratitis, and was found to be more efficient than vancomycin. Thus, compound 28 had great potential as a promising lead compound for the treatment of Gram-positive bacterial infection.
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Affiliation(s)
- Yongzhi Chen
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, PR China
| | - Hongxia Li
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, PR China
| | - Jiayong Liu
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, PR China
| | - Rongcui Zhong
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, PR China
| | - Haizhou Li
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, PR China
| | - Shanfang Fang
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, PR China
| | - Shouping Liu
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, PR China.
| | - Shuimu Lin
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State & NMPA Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, PR China.
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17
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Mensa B, Polizzi NF, Molnar KS, Natale AM, Lemmin T, DeGrado WF. Allosteric mechanism of signal transduction in the two-component system histidine kinase PhoQ. eLife 2021; 10:73336. [PMID: 34904568 PMCID: PMC8719878 DOI: 10.7554/elife.73336] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 12/13/2021] [Indexed: 12/05/2022] Open
Abstract
Transmembrane signaling proteins couple extracytosolic sensors to cytosolic effectors. Here, we examine how binding of Mg2+ to the sensor domain of an E. coli two component histidine kinase (HK), PhoQ, modulates its cytoplasmic kinase domain. We use cysteine-crosslinking and reporter-gene assays to simultaneously and independently probe the signaling state of PhoQ’s sensor and autokinase domains in a set of over 30 mutants. Strikingly, conservative single-site mutations distant from the sensor or catalytic site strongly influence PhoQ’s ligand-sensitivity as well as the magnitude and direction of the signal. Data from 35 mutants are explained by a semi-empirical three-domain model in which the sensor, intervening HAMP, and catalytic domains can adopt kinase-promoting or inhibiting conformations that are in allosteric communication. The catalytic and sensor domains intrinsically favor a constitutively ‘kinase-on’ conformation, while the HAMP domain favors the ‘off’ state; when coupled, they create a bistable system responsive to physiological concentrations of Mg2+. Mutations alter signaling by locally modulating domain intrinsic equilibrium constants and interdomain couplings. Our model suggests signals transmit via interdomain allostery rather than propagation of a single concerted conformational change, explaining the diversity of signaling structural transitions observed in individual HK domains.
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Affiliation(s)
- Bruk Mensa
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, United States.,Cardiovascular Research Institute, University of California, San Francisco, San Francisco, United States.,Chemistry and Chemical Biology PhD program, University of California, San Francisco, San Francisco, United States
| | - Nicholas F Polizzi
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, United States
| | | | - Andrew M Natale
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, United States.,Cardiovascular Research Institute, University of California, San Francisco, San Francisco, United States.,Biophysics PhD program, University of California, San Francisco, San Francisco, United States
| | - Thomas Lemmin
- Euler Institute, Università della Svizzera Italiana, Lugano, Switzerland
| | - William F DeGrado
- Department of Pharmaceutical Chemistry, University of California, San Francisco, San Francisco, United States.,Cardiovascular Research Institute, University of California, San Francisco, San Francisco, United States
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18
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Schaefer S, Pham TTP, Brunke S, Hube B, Jung K, Lenardon MD, Boyer C. Rational Design of an Antifungal Polyacrylamide Library with Reduced Host-Cell Toxicity. ACS APPLIED MATERIALS & INTERFACES 2021; 13:27430-27444. [PMID: 34060800 DOI: 10.1021/acsami.1c05020] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Life-threatening invasive fungal infections represent an urgent threat to human health worldwide. The limited set of antifungal drugs has critical constraints such as resistance development and/or adverse side effects. One approach to overcome these limitations is to mimic naturally occurring antifungal peptides called defensins. Inspired by their advantageous amphiphilic properties, a library of 35 synthetic, linear, ternary polyacrylamides was prepared by controlled/living radical polymerization. The effect of the degree of polymerization (20, 40, and 100) and varying hydrophobic functionalities (branched, linear, cyclic, or aromatic differing in their number of carbons) on their antifungal activity was investigated. Short copolymers with a calculated log P of ∼1.5 revealed optimal activity against the major human fungal pathogen Candida albicans and other pathogenic fungal species with limited toxicity to mammalian host cells (red blood cells and fibroblasts). Remarkably, selected copolymers outperformed the commercial antifungal drug amphotericin B, with respect to the therapeutic index, highlighting their potential as novel antifungal compounds.
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Affiliation(s)
- Sebastian Schaefer
- School of Chemical Engineering, UNSW, Sydney, New South Wales 2052, Australia
- Australian Centre for Nanomedicine, UNSW, Sydney, New South Wales 2052, Australia
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knoell Institute, 07745 Jena, Germany
| | - Thi Thu Phuong Pham
- School of Chemical Engineering, UNSW, Sydney, New South Wales 2052, Australia
- Australian Centre for Nanomedicine, UNSW, Sydney, New South Wales 2052, Australia
| | - Sascha Brunke
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knoell Institute, 07745 Jena, Germany
| | - Bernhard Hube
- Department of Microbial Pathogenicity Mechanisms, Leibniz Institute for Natural Product Research and Infection Biology, Hans Knoell Institute, 07745 Jena, Germany
- Institute of Microbiology, Friedrich Schiller University, 07743 Jena, Germany
| | - Kenward Jung
- School of Chemical Engineering, UNSW, Sydney, New South Wales 2052, Australia
- Australian Centre for Nanomedicine, UNSW, Sydney, New South Wales 2052, Australia
| | - Megan Denise Lenardon
- School of Biotechnology and Biomolecular Sciences, UNSW, Sydney, New South Wales 2052, Australia
| | - Cyrille Boyer
- School of Chemical Engineering, UNSW, Sydney, New South Wales 2052, Australia
- Australian Centre for Nanomedicine, UNSW, Sydney, New South Wales 2052, Australia
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19
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20
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Bakovic A, Risner K, Bhalla N, Alem F, Chang TL, Weston WK, Harness JA, Narayanan A. Brilacidin Demonstrates Inhibition of SARS-CoV-2 in Cell Culture. Viruses 2021; 13:271. [PMID: 33572467 PMCID: PMC7916214 DOI: 10.3390/v13020271] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 01/28/2021] [Accepted: 02/05/2021] [Indexed: 12/17/2022] Open
Abstract
Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2), the newly emergent causative agent of coronavirus disease-19 (COVID-19), has resulted in more than two million deaths worldwide since it was first detected in 2019. There is a critical global need for therapeutic intervention strategies that can be deployed to safely treat COVID-19 disease and reduce associated morbidity and mortality. Increasing evidence shows that both natural and synthetic antimicrobial peptides (AMPs), also referred to as Host Defense Proteins/Peptides (HDPs), can inhibit SARS-CoV-2, paving the way for the potential clinical use of these molecules as therapeutic options. In this manuscript, we describe the potent antiviral activity exerted by brilacidin-a de novo designed synthetic small molecule that captures the biological properties of HDPs-on SARS-CoV-2 in a human lung cell line (Calu-3) and a monkey cell line (Vero). These data suggest that SARS-CoV-2 inhibition in these cell culture models is likely to be a result of the impact of brilacidin on viral entry and its disruption of viral integrity. Brilacidin demonstrated synergistic antiviral activity when combined with remdesivir. Collectively, our data demonstrate that brilacidin exerts potent inhibition of SARS-CoV-2 against different strains of the virus in cell culture.
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Affiliation(s)
- Allison Bakovic
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, VA 20110, USA; (A.B.); (K.R.); (N.B.); (F.A.)
| | - Kenneth Risner
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, VA 20110, USA; (A.B.); (K.R.); (N.B.); (F.A.)
| | - Nishank Bhalla
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, VA 20110, USA; (A.B.); (K.R.); (N.B.); (F.A.)
| | - Farhang Alem
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, VA 20110, USA; (A.B.); (K.R.); (N.B.); (F.A.)
| | - Theresa L. Chang
- Public Health Research Institute, Rutgers, New Jersey Medical School, The State University of New Jersey, Newark, NJ 07103, USA;
| | - Warren K. Weston
- Innovation Pharmaceuticals Inc., Wakefield, MA 01880, USA; (W.K.W.); (J.A.H.)
| | - Jane A. Harness
- Innovation Pharmaceuticals Inc., Wakefield, MA 01880, USA; (W.K.W.); (J.A.H.)
| | - Aarthi Narayanan
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, VA 20110, USA; (A.B.); (K.R.); (N.B.); (F.A.)
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21
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Bechinger B, Juhl DW, Glattard E, Aisenbrey C. Revealing the Mechanisms of Synergistic Action of Two Magainin Antimicrobial Peptides. FRONTIERS IN MEDICAL TECHNOLOGY 2020; 2:615494. [PMID: 35047895 PMCID: PMC8757784 DOI: 10.3389/fmedt.2020.615494] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 11/30/2020] [Indexed: 12/18/2022] Open
Abstract
The study of peptide-lipid and peptide-peptide interactions as well as their topology and dynamics using biophysical and structural approaches have changed our view how antimicrobial peptides work and function. It has become obvious that both the peptides and the lipids arrange in soft supramolecular arrangements which are highly dynamic and able to change and mutually adapt their conformation, membrane penetration, and detailed morphology. This can occur on a local and a global level. This review focuses on cationic amphipathic peptides of the magainin family which were studied extensively by biophysical approaches. They are found intercalated at the membrane interface where they cause membrane thinning and ultimately lysis. Interestingly, mixtures of two of those peptides namely magainin 2 and PGLa which occur naturally as a cocktail in the frog skin exhibit synergistic enhancement of antimicrobial activities when investigated together in antimicrobial assays but also in biophysical experiments with model membranes. Detailed dose-response curves, presented here for the first time, show a cooperative behavior for the individual peptides which is much increased when PGLa and magainin are added as equimolar mixture. This has important consequences for their bacterial killing activities and resistance development. In membranes that carry unsaturations both peptides align parallel to the membrane surface where they have been shown to arrange into mesophases involving the peptides and the lipids. This supramolecular structuration comes along with much-increased membrane affinities for the peptide mixture. Because this synergism is most pronounced in membranes representing the bacterial lipid composition it can potentially be used to increase the therapeutic window of pharmaceutical formulations.
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Affiliation(s)
- Burkhard Bechinger
- University of Strasbourg/CNRS, UMR7177, Institut de Chimie de Strasbourg, Strasbourg, France
- Institut Universitaire de France (IUF), Paris, France
| | - Dennis Wilkens Juhl
- University of Strasbourg/CNRS, UMR7177, Institut de Chimie de Strasbourg, Strasbourg, France
| | - Elise Glattard
- University of Strasbourg/CNRS, UMR7177, Institut de Chimie de Strasbourg, Strasbourg, France
| | - Christopher Aisenbrey
- University of Strasbourg/CNRS, UMR7177, Institut de Chimie de Strasbourg, Strasbourg, France
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22
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Phuong PT, Oliver S, He J, Wong EHH, Mathers RT, Boyer C. Effect of Hydrophobic Groups on Antimicrobial and Hemolytic Activity: Developing a Predictive Tool for Ternary Antimicrobial Polymers. Biomacromolecules 2020; 21:5241-5255. [DOI: 10.1021/acs.biomac.0c01320] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Pham Thu Phuong
- Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Susan Oliver
- Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Junchen He
- Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Edgar H. H. Wong
- Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Robert T. Mathers
- Department of Chemistry, Penn State University, New Kensington, Pennsylvania 15068, United States
| | - Cyrille Boyer
- Australian Centre for NanoMedicine, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
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23
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Lin S, Chen Y, Li H, Liu J, Liu S. Design, synthesis, and evaluation of amphiphilic sofalcone derivatives as potent Gram-positive antibacterial agents. Eur J Med Chem 2020; 202:112596. [PMID: 32659547 DOI: 10.1016/j.ejmech.2020.112596] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/14/2020] [Accepted: 06/15/2020] [Indexed: 01/09/2023]
Abstract
New antimicrobial agents are urgently needed to overcome drug-resistant bacterial infections. Here we describe the design, synthesis and evaluation of a new class of amphiphilic sofalcone compounds as antimicrobial peptidomimetics. The most promising compound 14, bearing two arginine residues, showed poor hemolytic activity, low cytotoxicity, and excellent antimicrobial activity against Gram-positive bacteria, including MRSA. Compound 14, had good stability in various salt conditions, killed bacteria rapidly by directly disrupting bacterial cell membranes and was slow at developing bacterial resistance. Additionally, compound 14 exhibited effective in vivo efficacy in the murine model of bacterial keratitis caused by Staphylococcus aureus ATCC29213. Our studies suggested that compound 14 possessed promising potential to be used as a novel antimicrobial agent to combat drug-resistant Gram-positive bacteria.
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Affiliation(s)
- Shuimu Lin
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, PR China.
| | - Yongzhi Chen
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, PR China
| | - Hongxia Li
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, PR China
| | - Jiayong Liu
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, PR China
| | - Shouping Liu
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, 511436, PR China.
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24
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Zhou M, Zheng M, Cai J. Small Molecules with Membrane-Active Antibacterial Activity. ACS APPLIED MATERIALS & INTERFACES 2020; 12:21292-21299. [PMID: 31944092 DOI: 10.1021/acsami.9b20161] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This spotlight on application provides a brief overview of our research exploration, focusing on the research of small molecules with membrane-active antibacterial activity that mimic host-defense peptides (HDPs). The development of antimicrobial HDP agents is an emerging research area as they circumvent the potential disadvantages of HDPs. The small molecules are preferable for development due to their low production cost and potential of more practical applications. In recent years, we conducted research on the design of antibacterial agents based on small molecules including hydantoins, acylated reduced amides, biscyclic guanidines, and dimeric alkylamides of lysines. We herein sketch our journey on the exploration of the antimicrobial activity of these few classes of molecules and hopefully share our insight in the future design of small-molecular-weight antibiotic agents with membrane-active activity that mimic HDPs.
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Affiliation(s)
- Mi Zhou
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Mengmeng Zheng
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Jianfeng Cai
- Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, Florida 33620, United States
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25
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Rahman MA, Jui MS, Bam M, Cha Y, Luat E, Alabresm A, Nagarkatti M, Decho AW, Tang C. Facial Amphiphilicity-Induced Polymer Nanostructures for Antimicrobial Applications. ACS APPLIED MATERIALS & INTERFACES 2020; 12:21221-21230. [PMID: 31939652 DOI: 10.1021/acsami.9b19712] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
New antimicrobial agents are needed to address ever-increasing antimicrobial resistance and a growing epidemic of infections caused by multidrug resistant pathogens. We design nanostructured antimicrobial copolymers containing multicyclic natural products that bear facial amphiphilicity. Bile acid based macromolecular architectures of these nanostructures can interact preferentially with bacterial membranes. Incorporation of polyethylene glycol into the copolymers not only improved the colloidal stability of nanostructures but also increased the biocompatibility. This study investigated the effects of facial amphiphilicity, polymer architectures, and self-assembled nanostructures on antimicrobial activity. Advanced nanostructures such as spheres, vesicles, and rod-shaped aggregates are formed in water from the facial amphiphilic cationic copolymers via supramolecular interactions. These aggregates were particularly interactive toward Gram-positive and Gram-negative bacterial cell membranes and showed low hemolysis against mammalian cells.
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Affiliation(s)
| | | | - Marpe Bam
- Department of Pathology, Microbiology and Immunology, University of South Carolina, School of Medicine, Columbia, South Carolina 29209, United States
| | | | | | | | - Mitzi Nagarkatti
- Department of Pathology, Microbiology and Immunology, University of South Carolina, School of Medicine, Columbia, South Carolina 29209, United States
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26
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Zheng W, Anzaldua M, Arora A, Jiang Y, McIntyre K, Doerfert M, Winter T, Mishra A, Ma H, Liang H. Environmentally Benign Nanoantibiotics with a Built-in Deactivation Switch Responsive to Natural Habitats. Biomacromolecules 2020; 21:2187-2198. [PMID: 32202760 DOI: 10.1021/acs.biomac.0c00163] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The massive use of antibiotics in healthcare and agriculture has led to their artificial accumulation in natural habitats, which risks the structure and function of the microbial communities in ecosystems, threatens food and water security, and accelerates the development of resistome. Ideally, antibiotics should remain fully active in clinical services while becoming deactivated rapidly once released into the environment, but none of the current antibiotics meet this criterion. Here, we show a nanoantibiotic design that epitomizes the concept of carrying a built-in "OFF" switch responsive to natural stimuli. The environmentally benign nanoantibiotics consist of cellulose backbones covalently grafted with hydrophilic polymer brushes that by themselves are antimicrobially inactive. In their nanostructured forms in services, these cellulose-based polymer molecular brushes are potent killers for both Gram-positive and Gram-negative bacteria, including clinical multidrug-resistant strains; after services and being discharged into the environment, they are shredded into antimicrobially inactive pieces by cellulases that do not exist in the human body but are abundant in natural habitats. This study illuminates a new concept of mitigating the environmental footprints of antibiotics with rationally designed nanoantibiotics that can be dismantled and disabled by bioorthogonal chemistry occurring exclusively in natural habitats.
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Affiliation(s)
- Wan Zheng
- Department of Cell Physiology & Molecular Biophysics, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Miguel Anzaldua
- Department of Chemical Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Ankita Arora
- Department of Cell Physiology & Molecular Biophysics, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States.,Department of Materials Science and Engineering, Indian Institute of Technology Gandhinagar, Gujarat 382355, India
| | - Yunjiang Jiang
- Department of Cell Physiology & Molecular Biophysics, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Kelly McIntyre
- Department of Cell Physiology & Molecular Biophysics, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Michael Doerfert
- Department of Chemical Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Theodora Winter
- The Honors College, Texas Tech University, Lubbock, Texas 79409, United States
| | - Abhijit Mishra
- Department of Materials Science and Engineering, Indian Institute of Technology Gandhinagar, Gujarat 382355, India
| | - Hairong Ma
- Department of Cell Physiology & Molecular Biophysics, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States
| | - Hongjun Liang
- Department of Cell Physiology & Molecular Biophysics, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, United States.,Department of Chemical Engineering, Texas Tech University, Lubbock, Texas 79409, United States.,Department of Chemistry, Texas Tech University, Lubbock, Texas 79409, United States
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27
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Baruah S, Aier M, Puzari A. (S)‐4‐(4‐aminobenzyl)‐2‐oxazolidinone based 2‐azetidinones for antimicrobial application and luminescent sensing of divalent metal cations. J Heterocycl Chem 2020. [DOI: 10.1002/jhet.3965] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Shyamal Baruah
- Department of ChemistryNational Institute of Technology Nagaland Dimapur‐797103 Nagaland India
| | - Merangmenla Aier
- Department of ChemistryNational Institute of Technology Nagaland Dimapur‐797103 Nagaland India
| | - Amrit Puzari
- Department of ChemistryNational Institute of Technology Nagaland Dimapur‐797103 Nagaland India
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28
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Amabili P, Biavasco F, Brenciani A, Citterio B, Corbisiero D, Ferrazzano L, Fioriti S, Guerra G, Orena M, Rinaldi S. Simple amphiphilic α-hydrazido acids: Rational design, synthesis, and in vitro bioactivity profile of a novel class of potential antimicrobial compounds. Eur J Med Chem 2020; 189:112072. [DOI: 10.1016/j.ejmech.2020.112072] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 01/10/2020] [Accepted: 01/13/2020] [Indexed: 01/07/2023]
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29
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Der Torossian Torres M, de la Fuente-Nunez C. Reprogramming biological peptides to combat infectious diseases. Chem Commun (Camb) 2019; 55:15020-15032. [PMID: 31782426 DOI: 10.1039/c9cc07898c] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
With the rapid spread of resistance among parasites and bacterial pathogens, antibiotic-resistant infections have drawn much attention worldwide. Consequently, there is an urgent need to develop new strategies to treat neglected diseases and drug-resistant infections. Here, we outline several new strategies that have been developed to counter pathogenic microorganisms by designing and constructing antimicrobial peptides (AMPs). In addition to traditional discovery and design mechanisms guided by chemical biology, synthetic biology and computationally-based approaches offer useful tools for the discovery and generation of bioactive peptides. We believe that the convergence of such fields, coupled with systematic experimentation in animal models, will help translate biological peptides into the clinic. The future of anti-infective therapeutics is headed towards specifically designed molecules whose form is driven by computer-based frameworks. These molecules are selective, stable, and active at therapeutic doses.
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Affiliation(s)
- 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, and Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, 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, and Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
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30
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Su L, Li Y, Liu Y, An Y, Shi L. Recent Advances and Future Prospects on Adaptive Biomaterials for Antimicrobial Applications. Macromol Biosci 2019; 19:e1900289. [PMID: 31642591 DOI: 10.1002/mabi.201900289] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 09/19/2019] [Indexed: 12/15/2022]
Abstract
Bacterial infection is becoming the biggest threat to human health. The scenario is partly due to the ineffectiveness of the conventional antibiotic treatments against the emergence of multidrug-resistant bacteria and partly due to the bacteria living in biofilms or cells. Adaptive biomaterials can change their physicochemical properties in the microenvironment of bacterial infection, thereby facilitating either their interactions with bacteria or drug release. The trends in treating bacterial infections using adaptive biomaterials-based systems are flourishing and generate innumerous possibility to design novel antimicrobial therapeutics. This feature article aims to summarize the recent developments in the formulations, mechanisms, and advances of adaptive materials in bacterial infection diagnosis, contact killing of bacteria, and antimicrobial drug delivery. Also, the challenges and limitations of current antimicrobial treatments based on adaptive materials and their clinical and industrial future prospects are discussed.
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Affiliation(s)
- Linzhu Su
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Yuanfeng Li
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Yong Liu
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Yingli An
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Linqi Shi
- State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
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31
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Bordelon T, Bobay B, Murphy A, Reese H, Shanahan C, Odeh F, Broussard A, Kormos C, Menegatti S. Translating antibody-binding peptides into peptoid ligands with improved affinity and stability. J Chromatogr A 2019; 1602:284-299. [DOI: 10.1016/j.chroma.2019.05.047] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 05/03/2019] [Accepted: 05/24/2019] [Indexed: 12/18/2022]
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32
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Yang S, Lee CW, Kim HJ, Jung HH, Kim JI, Shin SY, Shin SH. Structural analysis and mode of action of BMAP-27, a cathelicidin-derived antimicrobial peptide. Peptides 2019; 118:170106. [PMID: 31226350 DOI: 10.1016/j.peptides.2019.170106] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 06/07/2019] [Accepted: 06/16/2019] [Indexed: 12/27/2022]
Abstract
BMAP-27, a member of cathelicidin family, plays an important role against microorganisms, including bacteria and fungi. BMAP-27 may exert antimicrobial effects through membrane integrity disruption, but the exact molecular mechanism remains unclear. To identify the structural features important for antimicrobial activity and propose a mechanism underlying antibacterial effects, we determined the nuclear magnetic resonance structure of BMAP-27 in a membrane-mimetic environment and investigated its interactions with lipid membranes. BMAP-27 exhibited a long N-terminal α-helix with faces patterned into aromatic and cationic regions, central kink, and short hydrophobic C-terminal helix. While the N-terminal 18-residue peptide (BMAP-18) exerted only antibacterial activity, BMAP-27 showed potent activity against bacteria and cancer cells. Both peptides inhibited bacterial growth, but BMAP-18 showed delayed bactericidal activity and BMAP-27 completely killed bacteria within 20 min. The differences in antimicrobial activities and microbicidal kinetics may be associated with membrane permeabilisation; BMAP-27 rapidly and largely disrupted membrane integrity, whereas BMAP-18 showed low membrane disruption activity. Thus, the N-terminal helix is sufficient to inhibit bacterial growth and the C-terminal helix is involved in membrane permeabilisation for rapid bactericidal and efficient anticancer activities. The structural and functional characterisation of BMAP-27 may encourage the development of novel antimicrobial/anticancer agents.
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Affiliation(s)
- Sungtae Yang
- Department of Microbiology, Chosun University School of Medicine, Gwangju, 61452, South Korea.
| | - Chul Won Lee
- Department of Chemistry, Chonnam National University, Gwangju, 61186, South Korea
| | - Hak Jun Kim
- Department of Chemistry, Pukyong National University, Busan, 48513, South Korea
| | - Hyun-Ho Jung
- School of Life Sciences, Gwangju Institute of Science and Technology, Gwangju, 61005, South Korea
| | - Jae Il Kim
- School of Life Sciences, Gwangju Institute of Science and Technology, Gwangju, 61005, South Korea
| | - Song Yub Shin
- Department of Cellular and Molecular Medicine, Chosun University School of Medicine, Gwangju, 61452, South Korea
| | - Sung-Heui Shin
- Department of Microbiology, Chosun University School of Medicine, Gwangju, 61452, South Korea.
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33
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Reddy PS, Langlois d'Estaintot B, Granier T, Mackereth CD, Fischer L, Huc I. Structure Elucidation of Helical Aromatic Foldamer-Protein Complexes with Large Contact Surface Areas. Chemistry 2019; 25:11042-11047. [PMID: 31257622 DOI: 10.1002/chem.201902942] [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: 06/26/2019] [Indexed: 01/12/2023]
Abstract
The development of large synthetic ligands could be useful to target the sizeable surface areas involved in protein-protein interactions. Herein, we present long helical aromatic oligoamide foldamers bearing proteinogenic side chains that cover up to 450 Å2 of the human carbonic anhydrase II (HCA) surface. The foldamers are composed of aminoquinolinecarboxylic acids bearing proteinogenic side chains and of more flexible aminomethyl-pyridinecarboxylic acids that enhance helix handedness dynamics. Crystal structures of HCA-foldamer complexes were obtained with a 9- and a 14-mer both showing extensive protein-foldamer hydrophobic contacts. In addition, foldamer-foldamer interactions seem to be prevalent in the crystal packing, leading to the peculiar formation of an HCA superhelix wound around a rod of stacked foldamers. Solution studies confirm the positioning of the foldamer at the protein surface as well as a dimerization of the complexes.
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Affiliation(s)
- Post Sai Reddy
- CBMN (UMR5248), Univ. Bordeaux-CNRS-INP, Institut Européen de Chimie et Biologie, 2 rue Escarpit, 33600, Pessac, France
| | - Béatrice Langlois d'Estaintot
- CBMN (UMR5248), Univ. Bordeaux-CNRS-INP, Institut Européen de Chimie et Biologie, 2 rue Escarpit, 33600, Pessac, France
| | - Thierry Granier
- CBMN (UMR5248), Univ. Bordeaux-CNRS-INP, Institut Européen de Chimie et Biologie, 2 rue Escarpit, 33600, Pessac, France
| | - Cameron D Mackereth
- ARNA (U1212), Univ. Bordeaux-INSERM-CNRS, Institut Européen de Chimie et Biologie, 2 rue Escarpit, 33600, Pessac, France
| | - Lucile Fischer
- CBMN (UMR5248), Univ. Bordeaux-CNRS-INP, Institut Européen de Chimie et Biologie, 2 rue Escarpit, 33600, Pessac, France
| | - Ivan Huc
- CBMN (UMR5248), Univ. Bordeaux-CNRS-INP, Institut Européen de Chimie et Biologie, 2 rue Escarpit, 33600, Pessac, France.,Department Pharmazie and Center for Integrated Protein Science, Ludwig-Maximilians-Universität, Butenandtstr. 5-13, 81377, München, Germany
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34
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Judzewitsch PR, Zhao L, Wong EHH, Boyer C. High-Throughput Synthesis of Antimicrobial Copolymers and Rapid Evaluation of Their Bioactivity. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00290] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Peter R. Judzewitsch
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN), School of Chemical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Lily Zhao
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN), School of Chemical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Edgar H. H. Wong
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN), School of Chemical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN), School of Chemical Engineering, UNSW Sydney, Sydney, NSW 2052, Australia
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35
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Kuppusamy R, Yasir M, Yee E, Willcox M, Black DS, Kumar N. Guanidine functionalized anthranilamides as effective antibacterials with biofilm disruption activity. Org Biomol Chem 2019; 16:5871-5888. [PMID: 30070287 DOI: 10.1039/c8ob01699b] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
We describe a library of amphiphilic anthranilamide compounds as antimicrobial peptide (AMP) mimics. These contain a hydrophobic naphthoyl side chain and different hydrophilic cationic groups such as amino, quaternary ammonium and guanidino groups. These are prepared via the ring-opening of different isatoic anhydrides. The antibacterial activity against S. aureus and E. coli of compounds containing guanidino cationic groups was greater than that for amino and quaternary ammonium cationic groups. The fluoro-substituted guanidinium compound 9b showed a minimum inhibitory concentration (MIC) of 2.0 μM against S. aureus, and reduced established biofilms of S. aureus by 92% at 64 μM concentration. The bromo-substituted guanidinium compound 9d exhibited good MIC against S. aureus (3.9 μM) and E. coli (15.6 μM) and disrupted established biofilms of S. aureus by 83% at 62.4 μM concentration. Cytoplasmic membrane permeability studies suggested that depolarization and disruption of the bacterial cell membrane could be a possible mechanism for antibacterial activity and the in vitro toxicity studies against MRC-5 human lung fibroblast cells showed that the potent compounds are non-toxic against mammalian cells.
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Affiliation(s)
- Rajesh Kuppusamy
- School of Chemistry, UNSW Australia, Sydney, NSW 2052, Australia.
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36
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Palermo EF, Lienkamp K, Gillies ER, Ragogna PJ. Antibacterial Activity of Polymers: Discussions on the Nature of Amphiphilic Balance. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201813810] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Edmund F. Palermo
- Rensselaer Polytechnic InstituteMaterials Science and Engineering 110 8th St. Troy NY 12180 USA
| | - Karen Lienkamp
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) and Department of Microsystems Engineering (IMTEK)Albert-Ludwigs-Universität Georges-Köhler-Allee 105 79110 Freiburg Germany
| | - Elizabeth R. Gillies
- Centre for Advanced Materials and Biomaterials ResearchDepartment of ChemistryThe University of Western Ontario 1151 Richmond St. London Canada
- Department of Chemical and Biochemical EngineeringThe University of Western Ontario 1151 Richmond St. London Canada
| | - Paul J. Ragogna
- Centre for Advanced Materials and Biomaterials ResearchDepartment of ChemistryThe University of Western Ontario 1151 Richmond St. London Canada
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37
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Palermo EF, Lienkamp K, Gillies ER, Ragogna PJ. Antibacterial Activity of Polymers: Discussions on the Nature of Amphiphilic Balance. Angew Chem Int Ed Engl 2019; 58:3690-3693. [DOI: 10.1002/anie.201813810] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Indexed: 01/10/2023]
Affiliation(s)
- Edmund F. Palermo
- Rensselaer Polytechnic Institute Materials Science and Engineering 110 8th St. Troy NY 12180 USA
| | - Karen Lienkamp
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) and Department of Microsystems Engineering (IMTEK) Albert-Ludwigs-Universität Georges-Köhler-Allee 105 79110 Freiburg Germany
| | - Elizabeth R. Gillies
- Centre for Advanced Materials and Biomaterials Research Department of Chemistry The University of Western Ontario 1151 Richmond St. London Canada
- Department of Chemical and Biochemical Engineering The University of Western Ontario 1151 Richmond St. London Canada
| | - Paul J. Ragogna
- Centre for Advanced Materials and Biomaterials Research Department of Chemistry The University of Western Ontario 1151 Richmond St. London Canada
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38
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Zhou Z, Ergene C, Lee JY, Shirley DJ, Carone BR, Caputo GA, Palermo EF. Sequence and Dispersity Are Determinants of Photodynamic Antibacterial Activity Exerted by Peptidomimetic Oligo(thiophene)s. ACS APPLIED MATERIALS & INTERFACES 2019; 11:1896-1906. [PMID: 30574776 DOI: 10.1021/acsami.8b19098] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A library of functionalized oligo(thiophene)s with precisely controlled chain length, regioregularity, sequence, and pendant moieties in the side chains was prepared by iterative convergent/divergent organometallic couplings. The cationic and facially amphiphilic structures were designed to mimic the salient physiochemical features of host defense peptides (HDPs) while concurrently exerting a photodynamic mechanism of antibacterial activity. In the dark, the oligothiophenes exert broad-spectrum and rapid bactericidal activity in the micromolar regime, which is the typical range of HDP activity. Under visible light, the antibacterial potency is enhanced by orders of magnitude, leading to potency in the nanomolar concentration range, whereas the toxicity to red blood cells (RBCs) is almost unaffected by the same visible light exposure. We attribute the potent and selective antibacterial activity to a dual mechanism of action that involves bacterial cell binding, combined with reactive oxygen species production in the bound state. Comonomer sequence and chain length dispersity play important roles in dictating the observed biological activities. The most promising candidate compound from a set of screening experiments showed antibacterial activity that is 3 orders of magnitude more potent against bacteria relative to toxicity against RBCs. Importantly, this compound did not induce resistance upon 21 subinhibitory passages, whereas the activity of ciprofloxacin was reduced 32× in the same condition. Cytotoxicity against HeLa cells in vitro is orders of magnitude weaker than antibacterial activity under visible light illumination. Thus, we have established a new class of HDP-mimetic antibacterial compounds with nanomolar activity and cell type selectivity of greater than 1300-fold. These and related compounds may be highly promising candidates in the urgent search for new topical photodynamic antibacterial formulations.
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Affiliation(s)
- Zhe Zhou
- Materials Science and Engineering , Rensselaer Polytechnic Institute , Troy , New York 12054 , United States
| | - Cansu Ergene
- Materials Science and Engineering , Rensselaer Polytechnic Institute , Troy , New York 12054 , United States
| | | | | | | | | | - Edmund F Palermo
- Materials Science and Engineering , Rensselaer Polytechnic Institute , Troy , New York 12054 , United States
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39
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Aisenbrey C, Marquette A, Bechinger B. The Mechanisms of Action of Cationic Antimicrobial Peptides Refined by Novel Concepts from Biophysical Investigations. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1117:33-64. [PMID: 30980352 DOI: 10.1007/978-981-13-3588-4_4] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Even 30 years after the discovery of magainins, biophysical and structural investigations on how these peptides interact with membranes can still bear surprises and add new interesting detail to how these peptides exert their antimicrobial action. Early on, using oriented solid-state NMR spectroscopy, it was found that the amphipathic helices formed by magainins are active when being oriented parallel to the membrane surface. More recent investigations indicate that this in-planar alignment is also found when PGLa and magainin in combination exert synergistic pore-forming activities, where studies on the mechanism of synergistic interaction are ongoing. In a related manner, the investigation of dimeric antimicrobial peptide sequences has become an interesting topic of research which bears promise to refine our views how antimicrobial action occurs. The molecular shape concept has been introduced to explain the effects of lipids and peptides on membrane morphology, locally and globally, and in particular of cationic amphipathic helices that partition into the membrane interface. This concept has been extended in this review to include more recent ideas on soft membranes that can adapt to external stimuli including membrane-disruptive molecules. In this manner, the lipids can change their shape in the presence of low peptide concentrations, thereby maintaining the bilayer properties. At higher peptide concentrations, phase transitions occur which lead to the formation of pores and membrane lytic processes. In the context of the molecular shape concept, the properties of lipopeptides, including surfactins, are shortly presented, and comparisons with the hydrophobic alamethicin sequence are made.
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Affiliation(s)
| | - Arnaud Marquette
- Université de Strasbourg/CNRS, UMR7177, Institut de Chimie, Strasbourg, France
| | - Burkhard Bechinger
- Université de Strasbourg/CNRS, UMR7177, Institut de Chimie, Strasbourg, France. .,Faculté de chimie, Institut le Bel, Strasbourg, France.
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40
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Aslam B, Wang W, Arshad MI, Khurshid M, Muzammil S, Rasool MH, Nisar MA, Alvi RF, Aslam MA, Qamar MU, Salamat MKF, Baloch Z. Antibiotic resistance: a rundown of a global crisis. Infect Drug Resist 2018; 11:1645-1658. [PMID: 30349322 PMCID: PMC6188119 DOI: 10.2147/idr.s173867] [Citation(s) in RCA: 1149] [Impact Index Per Article: 191.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The advent of multidrug resistance among pathogenic bacteria is imperiling the worth of antibiotics, which have previously transformed medical sciences. The crisis of antimicrobial resistance has been ascribed to the misuse of these agents and due to unavailability of newer drugs attributable to exigent regulatory requirements and reduced financial inducements. Comprehensive efforts are needed to minimize the pace of resistance by studying emergent microorganisms, resistance mechanisms, and antimicrobial agents. Multidisciplinary approaches are required across health care settings as well as environment and agriculture sectors. Progressive alternate approaches including probiotics, antibodies, and vaccines have shown promising results in trials that suggest the role of these alternatives as preventive or adjunct therapies in future.
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Affiliation(s)
- Bilal Aslam
- Department of Microbiology, Government College University Faisalabad, Faisalabad, Pakistan
| | - Wei Wang
- NHC Key Laboratory of Food Safety Risk Assessment, China National Center for Food Safety Risk Assessment, Beijing, China
| | - Muhammad Imran Arshad
- Institute of Microbiology, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Mohsin Khurshid
- Department of Microbiology, Government College University Faisalabad, Faisalabad, Pakistan.,College of Allied Health Professionals, Directorate of Medical Sciences, Government College University Faisalabad, Faisalabad, Pakistan
| | - Saima Muzammil
- Department of Microbiology, Government College University Faisalabad, Faisalabad, Pakistan
| | | | - Muhammad Atif Nisar
- Department of Microbiology, Government College University Faisalabad, Faisalabad, Pakistan
| | - Ruman Farooq Alvi
- Department of Microbiology, Government College University Faisalabad, Faisalabad, Pakistan
| | - Muhammad Aamir Aslam
- Institute of Microbiology, University of Agriculture Faisalabad, Faisalabad, Pakistan
| | - Muhammad Usman Qamar
- Department of Microbiology, Government College University Faisalabad, Faisalabad, Pakistan
| | | | - Zulqarnain Baloch
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China,
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41
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Design and synthesis of oligo-lipidated arginyl peptide (OLAP) dimers with enhanced physicochemical activity, peptide stability and their antimicrobial actions against MRSA infections. Amino Acids 2018; 50:1329-1345. [PMID: 30066172 DOI: 10.1007/s00726-018-2607-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 06/21/2018] [Indexed: 10/28/2022]
Abstract
Multi-drug resistant pathogens have been of increasing concern today. There is an urgent need for the discovery of more potent antibiotics. Cationic antimicrobial peptides (CAMPs) are known to be effective antimicrobial agents against resistant pathogens. However, poor activity under physiological conditions is one of the major limitations of CAMPS in clinical applications. In this study, a series of oligo-lipidated arginyl peptide OLAP dimers comprised of a saturated fatty acid chain (with m number of carbon units) and p repeating units of arginyl fatty acid chains (with n number of carbon units) were designed and studied for their antimicrobial activities as well as their physico-chemical property in various physiological conditions, such as in human serum albumin and high salt conditions. Our results showed that OLAP-11 exhibits potent antimicrobial activity against Gram-positive bacteria with improved physico-chemical activity in various physiological conditions. OLAP-11 is also less susceptible to human serum and trypsin degradation. The HPLC-MS analysis showed that the lipid-arginine bond is very stable. SYTOX Green assay and scanning electron microscopy both show that the OLAP-11 killed bacteria via inner membrane disruption. In addition, OLAP-11 is inner membrane targeting, making it difficult for bacteria to develop resistance. Overall, the design of the OLAP dimers provides an alternative approach to improve the physicochemical activity, peptide stability of CAMPs with potent inner membrane disruption and low in vitro toxicity to increase their potential for clinical applications in the future.
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42
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Boschert D, Schneider-Chaabane A, Himmelsbach A, Eickenscheidt A, Lienkamp K. Synthesis and Bioactivity of Polymer-Based Synthetic Mimics of Antimicrobial Peptides (SMAMPs) Made from Asymmetrically Disubstituted Itaconates. Chemistry 2018; 24:8217-8227. [PMID: 29600579 PMCID: PMC7611503 DOI: 10.1002/chem.201800907] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 03/26/2018] [Indexed: 12/27/2022]
Abstract
A series of asymmetrically disubstituted diitaconate monomers is presented. Starting from itaconic anhydride, functional groups could be placed selectively at the two nonequivalent carbonyl groups. By using 2D NMR spectroscopy, it was shown that the first functionalization step occurred at the carbonyl group in the β position to the double bond. These monomers were copolymerized with N,N-dimethylacrylamide (DMAA) to yield polymer-based synthetic mimics of antimicrobial peptides (SMAMPs). They were obtained by free radical polymerization, a metal-free process, and still maintained facial amphiphilicity at the repeat unit level. This eliminates the need for laborious metal removal and is advantageous from a regulatory and product safety perspective. The poly(diitaconate-co-DMAA) copolymers obtained were statistical to alternating, and the monomer feed ratio roughly matched that of the repeat unit content of the copolymers. Investigations of varied R group hydrophobicity, repeat unit ratio, and molecular mass on antimicrobial activity against Escherichia coli and on compatibility with human keratinocytes showed that the polymers with the longest R groups and lowest DMAA content were the most antimicrobial and hemolytic. This is in agreement with the biological activity of previously reported SMAMPs. Thus, the design concept of facial amphiphilicity has successfully been transferred, but the selectivity of these polymers for bacteria over mammalian cells still needs to be optimized.
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Affiliation(s)
- David Boschert
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) and Department of Microsystems Engineering (IMTEK), Albert-Ludwigs-Universität, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
| | - Alexandra Schneider-Chaabane
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) and Department of Microsystems Engineering (IMTEK), Albert-Ludwigs-Universität, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
| | - Andreas Himmelsbach
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) and Department of Microsystems Engineering (IMTEK), Albert-Ludwigs-Universität, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
| | - Alice Eickenscheidt
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) and Department of Microsystems Engineering (IMTEK), Albert-Ludwigs-Universität, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
| | - Karen Lienkamp
- Freiburg Center for Interactive Materials and Bioinspired Technologies (FIT) and Department of Microsystems Engineering (IMTEK), Albert-Ludwigs-Universität, Georges-Köhler-Allee 105, 79110 Freiburg, Germany
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43
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Marquette A, Bechinger B. Biophysical Investigations Elucidating the Mechanisms of Action of Antimicrobial Peptides and Their Synergism. Biomolecules 2018; 8:E18. [PMID: 29670065 PMCID: PMC6023007 DOI: 10.3390/biom8020018] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 04/13/2018] [Accepted: 04/16/2018] [Indexed: 01/30/2023] Open
Abstract
Biophysical and structural investigations are presented with a focus on the membrane lipid interactions of cationic linear antibiotic peptides such as magainin, PGLa, LL37, and melittin. Observations made with these peptides are distinct as seen from data obtained with the hydrophobic peptide alamethicin. The cationic amphipathic peptides predominantly adopt membrane alignments parallel to the bilayer surface; thus the distribution of polar and non-polar side chains of the amphipathic helices mirror the environmental changes at the membrane interface. Such a membrane partitioning of an amphipathic helix has been shown to cause considerable disruptions in the lipid packing arrangements, transient openings at low peptide concentration, and membrane disintegration at higher peptide-to-lipid ratios. The manifold supramolecular arrangements adopted by lipids and peptides are represented by the 'soft membranes adapt and respond, also transiently' (SMART) model. Whereas molecular dynamics simulations provide atomistic views on lipid membranes in the presence of antimicrobial peptides, the biophysical investigations reveal interesting details on a molecular and supramolecular level, and recent microscopic imaging experiments delineate interesting sequences of events when bacterial cells are exposed to such peptides. Finally, biophysical studies that aim to reveal the mechanisms of synergistic interactions of magainin 2 and PGLa are presented, including unpublished isothermal titration calorimetry (ITC), circular dichroism (CD) and dynamic light scattering (DLS) measurements that suggest that the peptides are involved in liposome agglutination by mediating intermembrane interactions. A number of structural events are presented in schematic models that relate to the antimicrobial and synergistic mechanism of amphipathic peptides when they are aligned parallel to the membrane surface.
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Affiliation(s)
- Arnaud Marquette
- Université de Strasbourg/CNRS, UMR7177, Institut de Chimie, 4, rue Blaise Pascal, 67070 Strasbourg, France.
| | - Burkhard Bechinger
- Université de Strasbourg/CNRS, UMR7177, Institut de Chimie, 4, rue Blaise Pascal, 67070 Strasbourg, France.
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44
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Niu Y, Wang M, Cao Y, Nimmagadda A, Hu J, Wu Y, Cai J, Ye XS. Rational Design of Dimeric Lysine N-Alkylamides as Potent and Broad-Spectrum Antibacterial Agents. J Med Chem 2018; 61:2865-2874. [PMID: 29569910 DOI: 10.1021/acs.jmedchem.7b01704] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Antibiotic resistance is one of the biggest threats to public health, and new antibacterial agents hence are in an urgent need to combat infectious diseases caused by multidrug-resistant (MDR) pathogens. Utilizing dimerization strategy, we rationally designed and efficiently synthesized a new series of small molecule dimeric lysine alkylamides as mimics of AMPs. Evaluation of these mimics against a panel of Gram-positive and Gram-negative bacteria including MDR strains was performed, and a broad-spectrum and potent compound 3d was identified. This compound displayed high specificity toward bacteria over mammalian cell. Time-kill kinetics and mechanistic studies suggest that compound 3d quickly eliminated bacteria in a bactericidal mode by disrupting bacterial cell membrane. In addition, lead compound 3d could inhibit biofilm formation and did not develop drug resistance in S. aureus and E. coli over 14 passages. These results suggested that dimeric lysine nonylamide has immense potential as a new type of novel small molecular agent to combat antibiotic resistance.
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Affiliation(s)
- Youhong Niu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences , Peking University , Xue Yuan Road No.38 , Beijing 100191 , China
| | - Minghui Wang
- Department of Chemistry , University of South Florida , 4202 E. Fowler Avenue , Tampa , Florida 33620 , United States
| | - Yafei Cao
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences , Peking University , Xue Yuan Road No.38 , Beijing 100191 , China
| | - Alekhya Nimmagadda
- Department of Chemistry , University of South Florida , 4202 E. Fowler Avenue , Tampa , Florida 33620 , United States
| | - Jianxing Hu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences , Peking University , Xue Yuan Road No.38 , Beijing 100191 , China
| | - Yanfen Wu
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences , Peking University , Xue Yuan Road No.38 , Beijing 100191 , China
| | - Jianfeng Cai
- Department of Chemistry , University of South Florida , 4202 E. Fowler Avenue , Tampa , Florida 33620 , United States
| | - Xin-Shan Ye
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences , Peking University , Xue Yuan Road No.38 , Beijing 100191 , China
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45
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Sun H, Hong Y, Xi Y, Zou Y, Gao J, Du J. Synthesis, Self-Assembly, and Biomedical Applications of Antimicrobial Peptide-Polymer Conjugates. Biomacromolecules 2018. [PMID: 29539262 DOI: 10.1021/acs.biomac.8b00208] [Citation(s) in RCA: 154] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Antimicrobial peptides (AMPs) have been attracting much attention due to their excellent antimicrobial efficiency and low rate in driving antimicrobial resistance (AMR), which has been increasing globally to alarming levels. Conjugation of AMPs into functional polymers not only preserves excellent antimicrobial activities but reduces the toxicity and offers more functionalities, which brings new insight toward developing multifunctional biomedical materials such as hydrogels, polymer vesicles, polymer micelles, and so forth. These nanomaterials have been exhibiting excellent antimicrobial activity against a broad spectrum of bacteria including multidrug-resistant (MDR) ones, high selectivity, and low cytotoxicity, suggesting promising potentials in wound dressing, implant coating, antibiofilm, tissue engineering, and so forth. This Perspective seeks to highlight the state-of-the-art strategy for the synthesis, self-assembly, and biomedical applications of AMP-polymer conjugates and explore the promising directions for future research ranging from synthetic strategies, multistage and stimuli-responsive antibacterial activities, antifungi applications, and potentials in elimination of inflammation during medical treatment. It also will provide perspectives on how to stem the remaining challenges and unresolved problems in combating bacteria, including MDR ones.
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Affiliation(s)
- Hui Sun
- Department of Polymeric Materials, School of Materials Science and Engineering , Tongji University , 4800 Caoan Road , Shanghai 201804 , China
| | - Yuanxiu Hong
- Department of Polymeric Materials, School of Materials Science and Engineering , Tongji University , 4800 Caoan Road , Shanghai 201804 , China
| | - Yuejing Xi
- Department of Polymeric Materials, School of Materials Science and Engineering , Tongji University , 4800 Caoan Road , Shanghai 201804 , China
| | - Yijie Zou
- Department of Polymeric Materials, School of Materials Science and Engineering , Tongji University , 4800 Caoan Road , Shanghai 201804 , China
| | - Jingyi Gao
- Department of Polymeric Materials, School of Materials Science and Engineering , Tongji University , 4800 Caoan Road , Shanghai 201804 , China
| | - Jianzhong Du
- Department of Polymeric Materials, School of Materials Science and Engineering , Tongji University , 4800 Caoan Road , Shanghai 201804 , China.,Department of Orthopedics, Shanghai Tenth People's Hospital , Tongji University School of Medicine , Shanghai 200072 , China
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46
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Judzewitsch PR, Nguyen T, Shanmugam S, Wong EHH, Boyer C. Towards Sequence‐Controlled Antimicrobial Polymers: Effect of Polymer Block Order on Antimicrobial Activity. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201713036] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Peter R. Judzewitsch
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN) School of Chemical Engineering UNSW Australia Sydney NSW 2052 Australia
| | - Thuy‐Khanh Nguyen
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN) School of Chemical Engineering UNSW Australia Sydney NSW 2052 Australia
| | - Sivaprakash Shanmugam
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN) School of Chemical Engineering UNSW Australia Sydney NSW 2052 Australia
| | - Edgar H. H. Wong
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN) School of Chemical Engineering UNSW Australia Sydney NSW 2052 Australia
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN) School of Chemical Engineering UNSW Australia Sydney NSW 2052 Australia
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47
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Judzewitsch PR, Nguyen T, Shanmugam S, Wong EHH, Boyer C. Towards Sequence‐Controlled Antimicrobial Polymers: Effect of Polymer Block Order on Antimicrobial Activity. Angew Chem Int Ed Engl 2018; 57:4559-4564. [DOI: 10.1002/anie.201713036] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 01/24/2018] [Indexed: 12/14/2022]
Affiliation(s)
- Peter R. Judzewitsch
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN) School of Chemical Engineering UNSW Australia Sydney NSW 2052 Australia
| | - Thuy‐Khanh Nguyen
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN) School of Chemical Engineering UNSW Australia Sydney NSW 2052 Australia
| | - Sivaprakash Shanmugam
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN) School of Chemical Engineering UNSW Australia Sydney NSW 2052 Australia
| | - Edgar H. H. Wong
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN) School of Chemical Engineering UNSW Australia Sydney NSW 2052 Australia
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design (CAMD) and Australian Centre for NanoMedicine (ACN) School of Chemical Engineering UNSW Australia Sydney NSW 2052 Australia
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48
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Fu J, Yang H, Wang J. Computational design of the helical hairpin structure of membrane-active antibacterial peptides based on RSV glycoprotein epitope scaffold. Comput Biol Chem 2018; 73:200-205. [PMID: 29499459 DOI: 10.1016/j.compbiolchem.2018.02.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 02/10/2018] [Accepted: 02/15/2018] [Indexed: 12/16/2022]
Abstract
Peptides with helical hairpin conformation have been found to possess potent membrane activity and can be exploited as the structural scaffold of antibacterial peptides (ABPs). Here, we attempted to computationally design membrane-active ABPs based on the helical hairpin motif of respiratory syncytial virus (RSV) glycoprotein epitope. Dynamics simulations revealed that the epitope peptide Rfe (net charge = -1) cannot effectively interact with and permeabilize bacterial membrane due to the electrostatic repulsion between the negatively charged peptide and anionic membrane surface. The native Rfe can be modified to a cationic peptide Rfe-KKK (net charge = +6) by triple mutation of its positively charged residues Glu256, Asp263 and Asp269 to a basic lysine as well as by C-terminal amidation. As might be expected, the modified peptide was able to target membrane surface with a moderate antibacterial potency (MIC = 50-100 μg/ml). Next, a cyclized version of the linear Rfe-KKK was generated, termed as cycRfe-KKK, which was observed to have improved membrane activity and increased antibacterial potency (MIC < 50 μg/ml) by pre-stabilizing amphipathic hairpin conformation of the peptide.
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Affiliation(s)
- Jinhua Fu
- Intensive Care Unit, Yidu Central Hospital Affiliated to Weifang Medical University, Qingzhou 262500, China.
| | - Hong Yang
- Emergency Department Work Office, Yidu Central Hospital Affiliated to Weifang Medical University, Qingzhou 262500, China
| | - Jing Wang
- Intensive Care Unit, Yidu Central Hospital Affiliated to Weifang Medical University, Qingzhou 262500, China
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49
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Design and synthesis of coumarin–imidazole hybrid and phenyl-imidazoloacrylates as potent antimicrobial and antiinflammatory agents. MONATSHEFTE FUR CHEMIE 2018. [DOI: 10.1007/s00706-017-2079-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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50
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Espinoza EM, Larsen-Clinton JM, Krzeszewski M, Darabedian N, Gryko DT, Vullev VI. Bioinspired approach toward molecular electrets: synthetic proteome for materials. PURE APPL CHEM 2017. [DOI: 10.1515/pac-2017-0309] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
AbstractMolecular-level control of charge transfer (CT) is essential for both, organic electronics and solar-energy conversion, as well as for a wide range of biological processes. This article provides an overview of the utility of local electric fields originating from molecular dipoles for directing CT processes. Systems with ordered dipoles, i.e. molecular electrets, are the centerpiece of the discussion. The conceptual evolution from biomimicry to biomimesis, and then to biological inspiration, paves the roads leading from testing the understanding of how natural living systems function to implementing these lessons into optimal paradigms for specific applications. This progression of the evolving structure-function relationships allows for the development of bioinspired electrets composed of non-native aromatic amino acids. A set of such non-native residues that are electron-rich can be viewed as a synthetic proteome for hole-transfer electrets. Detailed considerations of the electronic structure of an individual residue prove of key importance for designating the points for optimal injection of holes (i.e. extraction of electrons) in electret oligomers. This multifaceted bioinspired approach for the design of CT molecular systems provides unexplored paradigms for electronic and energy science and engineering.
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Affiliation(s)
- Eli M. Espinoza
- Department of Chemistry, University of California, Riverside, CA 92521, USA
| | | | - Maciej Krzeszewski
- Department of Bioengineering, University of California, Riverside, CA 92521, USA
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224 Warsaw, Poland
| | - Narek Darabedian
- Department of Bioengineering, University of California, Riverside, CA 92521, USA
| | - Daniel T. Gryko
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44-52, 01-224 Warsaw, Poland
| | - Valentine I. Vullev
- Department of Chemistry, University of California, Riverside, CA 92521, USA
- Department of Bioengineering, University of California, Riverside, CA 92521, USA
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