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Zhu Y, Xu Y, Yan J, Fang Y, Dong N, Shan A. "AMP plus": Immunostimulant-Inspired Design Based on Chemotactic Motif -( PhHA hPH) n. ACS APPLIED MATERIALS & INTERFACES 2023; 15:43563-43579. [PMID: 37691475 DOI: 10.1021/acsami.3c09353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Ability to stimulate antimicrobial immunity has proven to be a useful therapeutic strategy in treating infections, especially in the face of increasing antibiotic resistance. Natural antimicrobial peptides (AMPs) exhibiting immunomodulatory functions normally encompass complex activities, which make it difficult to optimize their therapeutic benefits. Here, a chemotactic motif was harnessed as a template to design a series of AMPs with immunostimulatory activities plus bacteria-killing activities ("AMP plus"). An amphipathic peptide ((PhHAhPH)n) was employed to improve the antimicrobial impact and expand the therapeutic potential of the chemotactic motif that lacked obvious bacteria-killing properties. A total of 18 peptides were designed and evaluated for their structure-activity relationships. Among the designed, KWH2 (1) potently killed bacteria and exhibited a narrow antimicrobial spectrum against Gram-negative bacteria and (2) activated macrophages (i.e., inducing Ca2+ influx, cell migration, and reactive oxygen species production) as a macrophage chemoattractant. Membrane permeabilization is the major antimicrobial mechanism of KWH2. Furthermore, the mouse subcutaneous abscess model supported the dual immunomodulatory and antimicrobial potential of KWH2 in vivo. The above results confirmed the efficiency of KWH2 in treating bacterial infection and provided a viable approach to develop immunomodulatory antimicrobial materials with desired properties.
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Affiliation(s)
- Yunhui Zhu
- Laboratory of Molecular Nutrition and Immunity, Nutrition and Immunity, College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150038, China
| | - Yinghan Xu
- Laboratory of Molecular Nutrition and Immunity, Nutrition and Immunity, College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150038, China
| | - Jianming Yan
- Laboratory of Molecular Nutrition and Immunity, Nutrition and Immunity, College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150038, China
| | - Yuxin Fang
- Laboratory of Molecular Nutrition and Immunity, Nutrition and Immunity, College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150038, China
| | - Na Dong
- Laboratory of Molecular Nutrition and Immunity, Nutrition and Immunity, College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150038, China
| | - Anshan Shan
- Laboratory of Molecular Nutrition and Immunity, Nutrition and Immunity, College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150038, China
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2
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Kong L, Dang S, Yao B, Li Y, Chen B, Hua X, Tian G. Preparation of pleated flower-like manganese-cobalt-silicate bimetallic electrode materials for supercapacitors. J Colloid Interface Sci 2022; 628:670-681. [PMID: 36027777 DOI: 10.1016/j.jcis.2022.08.012] [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: 05/13/2022] [Revised: 07/25/2022] [Accepted: 08/02/2022] [Indexed: 10/15/2022]
Abstract
Transition metal silicates (TMSS) have been studied as potential electrode materials for rechargeable batteries and supercapacitors (SCs), and delicate structural design can further enhance the capacity performance and cycling stability of TMSS electrode materials. Herein, a bimetallic doping modulation strategy was employed, and a novel metal-silicate structure was constructed to obtain SC anode materials with excellent electrochemical properties. Manganese cobalt silicate (AMMnCo) with a pleated flower-like structure was obtained by the reaction of Mn2+ and Co2+ with acid-etched montmorillonite (AM) substrates using a simple hydrothermal method. The benign, competitive bimetallic mechanism accelerates the growth of manganese silicate and cobalt silicate on treated montmorillonite (MMT), which results in more folded ion-transport channels on the lamellae and improves the electrochemical properties of the transition-metal silicates. AMMnCo exhibits a higher specific capacitance (979F·g-1/0.5 A·g-1) and better cycling performance (84 %/10,000 cycles) than its monometallic counterparts. Additionally, AMMnCo//AC (where AC is activated carbon), a hybrid supercapacitor (HSC) device, has a high mass specific capacitance and an energy density reaching 13.7 Wh·kg-1 at a power density of 246.9 W·kg-1. Therefore, AMMnCo is a prospective electrode material for high-performance SC applications.
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Affiliation(s)
- Lingpeng Kong
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, PR China.
| | - Shiyuan Dang
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, PR China
| | - Bingxue Yao
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, PR China
| | - Yan Li
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, PR China
| | - Bin Chen
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, PR China
| | - Xue Hua
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, PR China
| | - Guangyan Tian
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, PR China; Key Laboratory of Special Functional Materials for Ecological Environment and Information, Hebei University of Technology, Ministry of Education, Tianjin 300130, PR China.
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Rivera-Sanchez SP, Ocampo-Ibáñez ID, Liscano Y, Martínez N, Muñoz I, Manrique-Moreno M, Martinez-Martinez L, Oñate-Garzon J. Integrating In Vitro and In Silico Analysis of a Cationic Antimicrobial Peptide Interaction with Model Membranes of Colistin-Resistant Pseudomonas aeruginosa Strains. Pharmaceutics 2022; 14:pharmaceutics14061248. [PMID: 35745820 PMCID: PMC9230736 DOI: 10.3390/pharmaceutics14061248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 06/03/2022] [Accepted: 06/08/2022] [Indexed: 02/04/2023] Open
Abstract
Bacterial antibiotic resistance is a serious global public health concern. Infections caused by colistin-resistant Pseudomonas aeruginosa (CRPa) strains represent a serious threat due to their considerable morbidity and mortality rates, since most of the current empirical antibiotic therapies are ineffective against these strains. Accordingly, cationic antimicrobial peptides (CAMPs) have emerged as promising alternatives to control resistant bacteria. In this study, the interaction of a CAMP derived from cecropin D-like (∆M2) with model membranes mimicking bacterial biomembranes of wild-type (WTPa) strains of P. aeruginosa and CRPa was evaluated through in vitro and in silico approaches. In vitro interaction was determined by infrared spectroscopy, whereas in silico molecular dynamics was performed to predict specific interactions between amino acids of ∆M2 and lipids of model membrane systems. Experimental analysis showed this peptide interacted with the lipids of bacterial-like model membranes of WTPa and CRPa. In both cases, an increase in the concentration of peptides induced an increase in the phase transition temperature of the lipid systems. On the other hand, the peptides in solution underwent a transition from a random to a helical secondary structure after interacting with the membranes mostly favored in the CRPa system. The α-helix structure percentage for ΔM2 interacting with WTPa and CRPa lipid systems was 6.4 and 33.2%, respectively. Finally, molecular dynamics showed ∆M2 to have the most affinities toward the phospholipids palmitoyl-oleyl-phosphatidylglycerol (POPG) and palmitoyl-oleoyl-phosphatidylethanolamine (POPE) that mimic membranes of WTPa and CRPa, respectively. This work provides clues for elucidating the membrane-associated mechanism of action of ∆M2 against colistin-susceptible and -resistant strains of Pseudomonas aeruginosa.
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Affiliation(s)
- Sandra Patricia Rivera-Sanchez
- Research Group of Microbiology, Industry and Environment, Faculty of Basic Sciences, Universidad Santiago of Cali, Cali 760035, Colombia; (I.D.O.-I.); (N.M.); (I.M.)
- Transnational Research Group on Infectious Diseases, PhD School of Biomedicine, University of Córdoba, 14071 Córdoba, Spain
- Correspondence: (S.P.R.-S.); (J.O.-G.)
| | - Iván Darío Ocampo-Ibáñez
- Research Group of Microbiology, Industry and Environment, Faculty of Basic Sciences, Universidad Santiago of Cali, Cali 760035, Colombia; (I.D.O.-I.); (N.M.); (I.M.)
| | - Yamil Liscano
- Research Group of Comprehensive Health (GISI), Department Faculty of Health, Universidad Santiago de Cali, Cali 760035, Colombia;
| | - Natalia Martínez
- Research Group of Microbiology, Industry and Environment, Faculty of Basic Sciences, Universidad Santiago of Cali, Cali 760035, Colombia; (I.D.O.-I.); (N.M.); (I.M.)
| | - Isamar Muñoz
- Research Group of Microbiology, Industry and Environment, Faculty of Basic Sciences, Universidad Santiago of Cali, Cali 760035, Colombia; (I.D.O.-I.); (N.M.); (I.M.)
| | - Marcela Manrique-Moreno
- Chemistry Institute, Faculty of Exact and Natural Sciences, University of Antioquia, Medellin 050010, Colombia;
| | - Luis Martinez-Martinez
- Microbiology Unit, Reina Sofía University Hospital, 14008 Córdoba, Spain;
- Maimonides Institute for Biomedical Research of Córdoba, 14008 Córdoba, Spain
- Department of Agricultural Chemistry, Soil Sciencies and Microbiology, University of Córdoba, 14071 Córdoba, Spain
| | - José Oñate-Garzon
- Research Group of Chemistry and Biotechnology, Faculty of Basic Sciences, Universidad Santiago of Cali, Cali 760035, Colombia
- Correspondence: (S.P.R.-S.); (J.O.-G.)
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Bin Hafeez A, Jiang X, Bergen PJ, Zhu Y. Antimicrobial Peptides: An Update on Classifications and Databases. Int J Mol Sci 2021; 22:11691. [PMID: 34769122 PMCID: PMC8583803 DOI: 10.3390/ijms222111691] [Citation(s) in RCA: 87] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/24/2021] [Accepted: 10/25/2021] [Indexed: 02/06/2023] Open
Abstract
Antimicrobial peptides (AMPs) are distributed across all kingdoms of life and are an indispensable component of host defenses. They consist of predominantly short cationic peptides with a wide variety of structures and targets. Given the ever-emerging resistance of various pathogens to existing antimicrobial therapies, AMPs have recently attracted extensive interest as potential therapeutic agents. As the discovery of new AMPs has increased, many databases specializing in AMPs have been developed to collect both fundamental and pharmacological information. In this review, we summarize the sources, structures, modes of action, and classifications of AMPs. Additionally, we examine current AMP databases, compare valuable computational tools used to predict antimicrobial activity and mechanisms of action, and highlight new machine learning approaches that can be employed to improve AMP activity to combat global antimicrobial resistance.
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Affiliation(s)
- Ahmer Bin Hafeez
- Centre of Biotechnology and Microbiology, University of Peshawar, Peshawar 25120, Pakistan;
| | - Xukai Jiang
- Infection and Immunity Program, Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; (X.J.); (P.J.B.)
- National Glycoengineering Research Center, Shandong University, Qingdao 266237, China
| | - Phillip J. Bergen
- Infection and Immunity Program, Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; (X.J.); (P.J.B.)
| | - Yan Zhu
- Infection and Immunity Program, Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; (X.J.); (P.J.B.)
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Mohamed HA, Shepherd S, William N, Blundell HA, Das M, Pask CM, Lake BRM, Phillips RM, Nelson A, Willans CE. Silver(I) N-Heterocyclic Carbene Complexes Derived from Clotrimazole: Antiproliferative Activity and Interaction with an Artificial Membrane-Based Biosensor. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00069] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Heba A. Mohamed
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Samantha Shepherd
- School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, U.K
| | - Nicola William
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Helen A. Blundell
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Madhurima Das
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Christopher M. Pask
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Benjamin R. M. Lake
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
| | - Roger M. Phillips
- School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, U.K
| | - Andrew Nelson
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, U.K
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Owen J, Kuznecovs M, Bhamji R, William N, Domenech-Garcia N, Hesler M, Knoll T, Kohl Y, Nelson A, Kapur N. High-throughput electrochemical sensing platform for screening nanomaterial-biomembrane interactions. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2020; 91:025002. [PMID: 32113378 DOI: 10.1063/1.5131562] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 01/23/2020] [Indexed: 06/10/2023]
Abstract
A high-throughput, automated screening platform has been developed for the assessment of biological membrane damage caused by nanomaterials. Membrane damage is detected using the technique of analyzing capacitance-current peak changes obtained through rapid cyclic voltammetry measurements of a phospholipid self-assembled monolayer formed on a mercury film deposited onto a microfabricated platinum electrode after the interaction of a biomembrane-active species. To significantly improve wider usability of the screening technique, a compact, high-throughput screening platform was designed, integrating the monolayer-supporting microfabricated electrode into a microfluidic flow cell, with bespoke pumps used for precise, automated control of fluid flow. Chlorpromazine, a tricyclic antidepressant, and a citrate-coated 50 nm diameter gold nanomaterial (AuNM) were screened to successfully demonstrate the platform's viability for high-throughput screening. Chlorpromazine and the AuNM showed interactions with a 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) monolayer at concentrations in excess of 1 µmol dm-3. Biological validity of the electrochemically measured interaction of chlorpromazine with DOPC monolayers was confirmed through quantitative comparisons with HepG2 and A549 cytotoxicity assays. The platform also demonstrated desirable performance for high-throughput screening, with membrane interactions detected in <6 min per assay. Automation contributed to this significantly by reducing the required operating skill level when using the technique and minimizing fluid consumption.
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Affiliation(s)
- Joshua Owen
- Institute of Thermofluids, School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Maksims Kuznecovs
- Institute of Thermofluids, School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Raeesa Bhamji
- School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Nicola William
- School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom
| | | | - Michelle Hesler
- Fraunhofer Institute for Biomedical Engineering IBMT, Joseph-von-Fraunhofer-Weg 1, 66280 Sulzbach, Germany
| | - Thorsten Knoll
- Fraunhofer Institute for Biomedical Engineering IBMT, Joseph-von-Fraunhofer-Weg 1, 66280 Sulzbach, Germany
| | - Yvonne Kohl
- Fraunhofer Institute for Biomedical Engineering IBMT, Joseph-von-Fraunhofer-Weg 1, 66280 Sulzbach, Germany
| | - Andrew Nelson
- School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Nikil Kapur
- Institute of Thermofluids, School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom
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Topical antimicrobial peptide formulations for wound healing: Current developments and future prospects. Acta Biomater 2020; 103:52-67. [PMID: 31874224 DOI: 10.1016/j.actbio.2019.12.025] [Citation(s) in RCA: 182] [Impact Index Per Article: 45.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 12/16/2019] [Accepted: 12/18/2019] [Indexed: 12/20/2022]
Abstract
Antimicrobial peptides (AMPs) are the natural antibiotics recognized for their potent antibacterial and wound healing properties. Bare AMPs have limited activity following topical application attributable to their susceptibility to environment (hydrolysis, oxidation, photolysis), and wound (alkaline pH, proteolysis) related factors as well as minimal residence time. Therefore, the formulation of AMPs is essential to enhance stability, prolong delivery, and optimize effectiveness at the wound site. Different topical formulations of AMPs have been developed so far including nanoparticles, hydrogels, creams, ointments, and wafers to aid in controlling bacterial infection and enhance wound healing process in vivo. Herein, an overview is provided of the AMPs and current understanding of their formulations for topical wound healing applications along with suitable examples. Furthermore, future prospects for the development of effective combination AMP formulations are discussed. STATEMENT OF SIGNIFICANCE: Chronic wound infection and subsequent development of antibiotic resistance are serious clinical problems affecting millions of people worldwide. Antimicrobial peptides (AMPs) possess great potential in effectively killing the bacteria with minimal risk of resistance development. However, AMPs susceptibility to degradation following topical application limits their antimicrobial and wound healing effects. Therefore, development of an optimized topical formulation with high peptide stability and sustained AMP delivery is necessary to maximize the antimicrobial and wound healing effects. The present review provides an overview of the state-of-art in the field of topical AMP formulations for wound healing. Current developments in the field of topical AMP formulations are reviewed and future prospects for the development of effective combination AMP formulations are discussed.
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Berditsch M, Afonin S, Reuster J, Lux H, Schkolin K, Babii O, Radchenko DS, Abdullah I, William N, Middel V, Strähle U, Nelson A, Valko K, Ulrich AS. Supreme activity of gramicidin S against resistant, persistent and biofilm cells of staphylococci and enterococci. Sci Rep 2019; 9:17938. [PMID: 31784584 PMCID: PMC6884456 DOI: 10.1038/s41598-019-54212-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 11/06/2019] [Indexed: 01/03/2023] Open
Abstract
Three promising antibacterial peptides were studied with regard to their ability to inhibit the growth and kill the cells of clinical strains of Staphylococcus aureus, Enterococcus faecalis and Enterococcus faecium. The multifunctional gramicidin S (GS) was the most potent, compared to the membranotropic temporin L (TL), being more effective than the innate-defence regulator IDR-1018 (IDR). These activities, compared across 16 strains as minimal bactericidal and minimal inhibitory concentrations (MIC), are independent of bacterial resistance pattern, phenotype variations and/or biofilm-forming potency. For S. aureus strains, complete killing is accomplished by all peptides at 5 × MIC. For E. faecalis strains, only GS exhibits a rapid bactericidal effect at 5 × MIC, while TL and IDR require higher concentrations. The biofilm-preventing activities of all peptides against the six strains with the largest biofilm biomass were compared. GS demonstrates the lowest minimal biofilm inhibiting concentrations, whereas TL and IDR are consistently less effective. In mature biofilms, only GS completely kills the cells of all studied strains. We compare the physicochemical properties, membranolytic activities, model pharmacokinetics and eukaryotic toxicities of the peptides and explain the bactericidal, antipersister and antibiofilm activities of GS by its elevated stability, pronounced cell-penetration ability and effective utilization of multiple modes of antibacterial action.
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Affiliation(s)
- Marina Berditsch
- Karlsruhe Institute of Technology (KIT), Institute of Organic Chemistry (IOC), Karlsruhe, 76131, Germany
| | - Sergii Afonin
- KIT, Institute of Biological Interfaces (IBG-2), Karlsruhe, 76021, Germany
| | - Jennifer Reuster
- Karlsruhe Institute of Technology (KIT), Institute of Organic Chemistry (IOC), Karlsruhe, 76131, Germany
| | - Hannah Lux
- Karlsruhe Institute of Technology (KIT), Institute of Organic Chemistry (IOC), Karlsruhe, 76131, Germany
| | - Kristina Schkolin
- Karlsruhe Institute of Technology (KIT), Institute of Organic Chemistry (IOC), Karlsruhe, 76131, Germany
| | - Oleg Babii
- KIT, Institute of Biological Interfaces (IBG-2), Karlsruhe, 76021, Germany
| | - Dmytro S Radchenko
- Enamine Ltd., Kyiv, 02094, Ukraine.,Taras Shevchenko National University of Kyiv, Kyiv, 01601, Ukraine
| | - Issah Abdullah
- University College London (UCL), UCL School of Pharmacy, London, WC1N 1AX, United Kingdom
| | - Nicola William
- University of Leeds, School of Chemistry, Leeds, LS9 2JT, United Kingdom
| | - Volker Middel
- KIT, Institute of Toxicology and Genetics (ITG), Eggenstein-Leopoldshafen, 76344, Germany
| | - Uwe Strähle
- KIT, Institute of Toxicology and Genetics (ITG), Eggenstein-Leopoldshafen, 76344, Germany
| | - Andrew Nelson
- University of Leeds, School of Chemistry, Leeds, LS9 2JT, United Kingdom
| | - Klara Valko
- University College London (UCL), UCL School of Pharmacy, London, WC1N 1AX, United Kingdom
| | - Anne S Ulrich
- Karlsruhe Institute of Technology (KIT), Institute of Organic Chemistry (IOC), Karlsruhe, 76131, Germany. .,KIT, Institute of Biological Interfaces (IBG-2), Karlsruhe, 76021, Germany.
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Nordström R, Andrén OC, Singh S, Malkoch M, Davoudi M, Schmidtchen A, Malmsten M. Degradable dendritic nanogels as carriers for antimicrobial peptides. J Colloid Interface Sci 2019; 554:592-602. [DOI: 10.1016/j.jcis.2019.07.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 07/12/2019] [Accepted: 07/12/2019] [Indexed: 12/18/2022]
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10
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Electrochemical characterization of a mixed lipid monolayer supported on Au(111) electrodes with implications for doxorubicin delivery. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.02.056] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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11
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Membrane interactions of microgels as carriers of antimicrobial peptides. J Colloid Interface Sci 2018; 513:141-150. [DOI: 10.1016/j.jcis.2017.11.014] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 11/01/2017] [Accepted: 11/04/2017] [Indexed: 12/11/2022]
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12
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Piotrowska U, Sobczak M, Oledzka E. Current state of a dual behaviour of antimicrobial peptides-Therapeutic agents and promising delivery vectors. Chem Biol Drug Des 2017; 90:1079-1093. [DOI: 10.1111/cbdd.13031] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 05/14/2017] [Accepted: 05/18/2017] [Indexed: 01/19/2023]
Affiliation(s)
- Urszula Piotrowska
- Chair of Inorganic and Analytical Chemistry; Department of Biomaterials Chemistry; Faculty of Pharmacy with the Laboratory Medicine Division; Medical University of Warsaw; Warsaw Poland
| | - Marcin Sobczak
- Chair of Inorganic and Analytical Chemistry; Department of Biomaterials Chemistry; Faculty of Pharmacy with the Laboratory Medicine Division; Medical University of Warsaw; Warsaw Poland
| | - Ewa Oledzka
- Chair of Inorganic and Analytical Chemistry; Department of Biomaterials Chemistry; Faculty of Pharmacy with the Laboratory Medicine Division; Medical University of Warsaw; Warsaw Poland
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Rashid A, Vakurov A, Mohamadi S, Sanver D, Nelson A. Substituents modulate biphenyl penetration into lipid membranes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:712-721. [DOI: 10.1016/j.bbamem.2017.01.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 12/29/2016] [Accepted: 01/19/2017] [Indexed: 10/20/2022]
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Ragaliauskas T, Mickevicius M, Rakovska B, Penkauskas T, Vanderah DJ, Heinrich F, Valincius G. Fast formation of low-defect-density tethered bilayers by fusion of multilamellar vesicles. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2017; 1859:669-678. [PMID: 28088448 DOI: 10.1016/j.bbamem.2017.01.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 12/19/2016] [Accepted: 01/10/2017] [Indexed: 10/20/2022]
Abstract
A facile and reproducible preparation of surface-supported lipid bilayers is essential for fundamental membrane research and biotechnological applications. We demonstrate that multilamellar vesicles fuse to molecular-anchor-grafted surfaces yielding low-defect-density, tethered bilayer membranes. Continuous bilayers are formed within 10min, while the electrically insulating bilayers with <0.1μm-2 defect density can be accomplished within 60min. Surface plasmon resonance spectroscopy indicates that an amount of lipid material transferred from vesicles to a surface is inversely proportional to the density of an anchor, while the total amount of lipid that includes tethered and transferred lipid remains constant within 5% standard error. This attests for the formation of intact bilayers independent of the tethering agent density. Neutron reflectometry (NR) revealed the atomic level structural details of the tethered bilayer showing, among other things, that the total thickness of the hydrophobic slab of the construct was 3.2nm and that the molar fraction of cholesterol in lipid content is essentially the same as the molar fraction of cholesterol in the multilamellar liposomes. NR also indicated the formation of an overlayer with an effective thickness of 1.9nm. These overlayers may be easily removed by a single rinse of the tethered construct with 30% ethanol solution. Fast assembly and low residual defect density achievable within an hour of fusion makes our tethered bilayer methodology an attractive platform for biosensing of membrane damaging agents, such as pore forming toxins.
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Affiliation(s)
- Tadas Ragaliauskas
- Institute of Biochemistry, Vilnius University, Sauletekio 7, Vilnius LT-10257 , Lithuania
| | - Mindaugas Mickevicius
- Institute of Biochemistry, Vilnius University, Sauletekio 7, Vilnius LT-10257 , Lithuania
| | - Bozena Rakovska
- Institute of Biochemistry, Vilnius University, Sauletekio 7, Vilnius LT-10257 , Lithuania
| | - Tadas Penkauskas
- Institute of Biochemistry, Vilnius University, Sauletekio 7, Vilnius LT-10257 , Lithuania
| | - David J Vanderah
- Institute for Bioscience and Biotechnology Research, Rockville, MD 20850, USA
| | - Frank Heinrich
- Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA; Department of Physics, Carnegie Mellon University, Pittsburgh, PA 15213, USA
| | - Gintaras Valincius
- Institute of Biochemistry, Vilnius University, Sauletekio 7, Vilnius LT-10257 , Lithuania.
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Pagnussatt FA, de Lima VR, Dora CL, Costa JAV, Putaux JL, Badiale-Furlong E. Assessment of the encapsulation effect of phenolic compounds from Spirulina sp. LEB-18 on their antifusarium activities. Food Chem 2016; 211:616-23. [DOI: 10.1016/j.foodchem.2016.05.098] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 05/14/2016] [Accepted: 05/16/2016] [Indexed: 10/21/2022]
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Topical delivery of low-cost protein drug candidates made in chloroplasts for biofilm disruption and uptake by oral epithelial cells. Biomaterials 2016; 105:156-166. [PMID: 27521618 DOI: 10.1016/j.biomaterials.2016.07.042] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 07/27/2016] [Accepted: 07/31/2016] [Indexed: 11/20/2022]
Abstract
Protein drugs (PD) are minimally utilized in dental medicine due to high cost and invasive surgical delivery. There is limited clinical advancement in disrupting virulent oral biofilms, despite their high prevalence in causing dental caries. Poor efficacy of antimicrobials following topical treatments or to penetrate and disrupt formed biofilms is a major challenge. We report an exciting low-cost approach using plant-made antimicrobial peptides (PMAMPs) retrocyclin or protegrin with complex secondary structures (cyclic/hairpin) for topical use to control biofilms. The PMAMPs rapidly killed the pathogen Streptococcus mutans and impaired biofilm formation following a single topical application of tooth-mimetic surface. Furthermore, we developed a synergistic approach using PMAMPs combined with matrix-degrading enzymes to facilitate their access into biofilms and kill the embedded bacteria. In addition, we identified a novel role for PMAMPs in delivering drugs to periodontal and gingival cells, 13-48 folds more efficiently than any other tested cell penetrating peptides. Therefore, PDs fused with protegrin expressed in plant cells could potentially play a dual role in delivering therapeutic proteins to gum tissues while killing pathogenic bacteria when delivered as topical oral formulations or in chewing gums. Recent FDA approval of plant-produced PDs augurs well for clinical advancement of this novel concept.
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17
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One-step synthesis of high-density peptide-conjugated gold nanoparticles with antimicrobial efficacy in a systemic infection model. Biomaterials 2016; 85:99-110. [DOI: 10.1016/j.biomaterials.2016.01.051] [Citation(s) in RCA: 96] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 12/31/2015] [Accepted: 01/26/2016] [Indexed: 11/20/2022]
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18
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Characterization of antimicrobial activity against Listeria and cytotoxicity of native melittin and its mutant variants. Colloids Surf B Biointerfaces 2016; 143:194-205. [PMID: 27011349 DOI: 10.1016/j.colsurfb.2016.03.037] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 03/10/2016] [Accepted: 03/13/2016] [Indexed: 01/30/2023]
Abstract
Antimicrobial peptides (AMPs) are relatively short peptides that have the ability to penetrate the cell membrane, form pores leading to cell death. This study compares both antimicrobial activity and cytotoxicity of native melittin and its two mutants, namely, melittin I17K (GIGAVLKVLTTGLPALKSWIKRKRQQ) with a higher charge and lower hydrophobicity and mutant G1I (IIGAVLKVLTTGLPALISWIKRKRQQ) of higher hydrophobicity. The antimicrobial activity against different strains of Listeria was investigated by bioassay, viability studies, fluorescence and transmission electron microscopy. Cytotoxicity was examined by lactate dehydrogenase (LDH) assay on mammalian Caco-2 cells. The minimum inhibitory concentration of native, mutant I17K, mutant G1I against Listeria monocytogenes F4244 was 0.315±0.008, 0.814±0.006 and 0.494±0.037μg/ml respectively, whereas the minimum bactericidal concentration values were 3.263±0.0034, 7.412±0.017 and 5.366±0.019μg/ml respectively. Lag time for inactivation of L. monocytogenes F4244 was observed at concentrations below 0.20 and 0.78μg/ml for native and mutant melittin I17K respectively. The antimicrobial activity against L. monocytogenes F4244 was in the order native>G1I>I17K. Native melittin was cytotoxic to mammalian Caco-2 cells above concentration of 2μg/ml, whereas the two mutants exhibited negligible cytotoxicity up to a concentration of 8μg/ml. Pore formation in cell wall/membrane was observed by transmission electron microscopy. Molecular dynamics (MD) simulation of native and its mutants indicated that (i) surface native melittin and G1I exhibited higher tendency to penetrate a mimic of bacterial cell membrane and (ii) transmembrane native and I17K formed water channel in mimics of bacterial and mammalian cell membranes.
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Xiong M, Lee MW, Mansbach RA, Song Z, Bao Y, Peek RM, Yao C, Chen LF, Ferguson AL, Wong GCL, Cheng J. Helical antimicrobial polypeptides with radial amphiphilicity. Proc Natl Acad Sci U S A 2015; 112:13155-60. [PMID: 26460016 PMCID: PMC4629321 DOI: 10.1073/pnas.1507893112] [Citation(s) in RCA: 135] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
α-Helical antimicrobial peptides (AMPs) generally have facially amphiphilic structures that may lead to undesired peptide interactions with blood proteins and self-aggregation due to exposed hydrophobic surfaces. Here we report the design of a class of cationic, helical homo-polypeptide antimicrobials with a hydrophobic internal helical core and a charged exterior shell, possessing unprecedented radial amphiphilicity. The radially amphiphilic structure enables the polypeptide to bind effectively to the negatively charged bacterial surface and exhibit high antimicrobial activity against both gram-positive and gram-negative bacteria. Moreover, the shielding of the hydrophobic core by the charged exterior shell decreases nonspecific interactions with eukaryotic cells, as evidenced by low hemolytic activity, and protects the polypeptide backbone from proteolytic degradation. The radially amphiphilic polypeptides can also be used as effective adjuvants, allowing improved permeation of commercial antibiotics in bacteria and enhanced antimicrobial activity by one to two orders of magnitude. Designing AMPs bearing this unprecedented, unique radially amphiphilic structure represents an alternative direction of AMP development; radially amphiphilic polypeptides may become a general platform for developing AMPs to treat drug-resistant bacteria.
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Affiliation(s)
- Menghua Xiong
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Michelle W Lee
- Department of Bioengineering, Department of Chemistry and Biochemistry, California NanoSystems Institute, University of California, Los Angeles, CA 90095
| | - Rachael A Mansbach
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Ziyuan Song
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Yan Bao
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Richard M Peek
- Division of Gastroenterology, Department of Medicine and Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN 37232
| | - Catherine Yao
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Lin-Feng Chen
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Andrew L Ferguson
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801; Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801
| | - Gerard C L Wong
- Department of Bioengineering, Department of Chemistry and Biochemistry, California NanoSystems Institute, University of California, Los Angeles, CA 90095;
| | - Jianjun Cheng
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801;
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20
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Du H, Samuel RL, Massiah MA, Gillmor SD. The structure and behavior of the NA-CATH antimicrobial peptide with liposomes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015. [DOI: 10.1016/j.bbamem.2015.07.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Matyszewska D, Bilewicz R. Interactions of daunorubicin with Langmuir–Blodgett thiolipid monolayers. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.01.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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22
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McGuire J. Building a working understanding of protein adsorption with model systems and serendipity. Colloids Surf B Biointerfaces 2014; 124:38-48. [DOI: 10.1016/j.colsurfb.2014.08.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 08/19/2014] [Accepted: 08/20/2014] [Indexed: 10/24/2022]
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23
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Sun J, Xia Y, Li D, Du Q, Liang D. Relationship between peptide structure and antimicrobial activity as studied by de novo designed peptides. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:2985-93. [PMID: 25157672 DOI: 10.1016/j.bbamem.2014.08.018] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2014] [Revised: 07/05/2014] [Accepted: 08/15/2014] [Indexed: 11/17/2022]
Abstract
As fundamental components in innate immunity, antimicrobial peptides (AMPs) hold great potentials in the treatment of persistent infections involving slow-growing or dormant bacteria in which, selective inhibition of prokaryotic bacteria in the context of eukaryotic cells is not only an essential requirement, but also a critical challenge in the development of antimicrobial peptides. To identify the sequence and structural properties critical for antimicrobial activity, a series of peptides varying in sequence, length, hydrophobicity/charge ratio, and secondary structure, were designed and synthesized. Their antimicrobial activities were then tested using Escherichia coli and HEK293 cells, together with several index activities against model membrane, including liposome leakage, fusion, and aggregation. While no evident correlation between the antimicrobial activity and the property of the peptides was observed, common activities against model membrane were nevertheless identified for the active antimicrobial peptides: mediating efficient membrane leakage, negligible membrane fusion and liposome aggregation. Therefore, in addition to identifying one highly active antimicrobial peptide, our study further sheds light on the design principle for these molecules.
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Affiliation(s)
- Jianbo Sun
- Beijing National Laboratory for Molecular Sciences and the Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, 100871 China
| | - Yuqiong Xia
- School of Life Sciences and Technology, Xidian University, Xi'an, Shaanxi 710126, China
| | - Dong Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100871, China
| | - Quan Du
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100871, China.
| | - Dehai Liang
- Beijing National Laboratory for Molecular Sciences and the Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, 100871 China.
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Abstract
With increasing antibiotics resistance, there is an urgent need for novel infection therapeutics. Since antimicrobial peptides provide opportunities for this, identification and optimization of such peptides have attracted much interest during recent years. Here, a brief overview of antimicrobial peptides is provided, with focus placed on how selected hydrophobic modifications of antimicrobial peptides can be employed to combat also more demanding pathogens, including multi-resistant strains, without conferring unacceptable toxicity.
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25
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Zhang S, Chen R, Malhotra G, Critchley K, Vakurov A, Nelson A. Electrochemical modelling of QD-phospholipid interactions. J Colloid Interface Sci 2014; 420:9-14. [DOI: 10.1016/j.jcis.2013.12.054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Revised: 12/20/2013] [Accepted: 12/23/2013] [Indexed: 11/25/2022]
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26
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Schmidtchen A, Pasupuleti M, Malmsten M. Effect of hydrophobic modifications in antimicrobial peptides. Adv Colloid Interface Sci 2014; 205:265-74. [PMID: 23910480 DOI: 10.1016/j.cis.2013.06.009] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 06/17/2013] [Accepted: 06/27/2013] [Indexed: 11/18/2022]
Abstract
With increasing resistance development against conventional antibiotics, there is an urgent need to identify novel approaches for infection treatment. Antimicrobial peptides may offer opportunities in this context, hence there has been considerable interest in identification and optimization of such peptides during the last decade in particular, with the long-term aim of developing these to potent and safe therapeutics. In the present overview, focus is placed on hydrophobic modifications of antimicrobial peptides, and how these may provide opportunities to combat also more demanding pathogens, including multi-resistant strains, yet not provoking unacceptable toxic responses. In doing so, physicochemical factors affecting peptide interactions with bacterial and eukaryotic cell membranes are discussed. Throughout, an attempt is made to illustrate how physicochemical studies on model lipid membranes can be correlated to result from bacterial and cell assays, and knowledge from this translated into therapeutic considerations.
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Affiliation(s)
- Artur Schmidtchen
- Section of Dermatology and Venereology, Department of Clinical Sciences, Lund University, SE-221 84 Lund, Sweden
| | - Mukesh Pasupuleti
- Section of Dermatology and Venereology, Department of Clinical Sciences, Lund University, SE-221 84 Lund, Sweden
| | - Martin Malmsten
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden.
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27
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Becucci L, Innocenti M, Bellandi S, Guidelli R. Permeabilization of mercury-supported biomimetic membranes by amphotericin B and the role of calcium ions. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.09.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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28
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Becucci L, Foresti ML, Schwan A, Guidelli R. Can proton pumping by SERCA enhance the regulatory role of phospholamban and sarcolipin? BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2013; 1828:2682-90. [DOI: 10.1016/j.bbamem.2013.07.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 06/22/2013] [Accepted: 07/08/2013] [Indexed: 11/26/2022]
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29
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Importance of lipopolysaccharide aggregate disruption for the anti-endotoxic effects of heparin cofactor II peptides. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2013; 1828:2709-19. [DOI: 10.1016/j.bbamem.2013.06.015] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2013] [Revised: 06/12/2013] [Accepted: 06/14/2013] [Indexed: 11/21/2022]
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30
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Vakurov A, Guillermo Mokry, Drummond-Brydson R, Wallace R, Svendsen C, Nelson A. ZnO nanoparticle interactions with phospholipid monolayers. J Colloid Interface Sci 2013; 404:161-8. [DOI: 10.1016/j.jcis.2013.05.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Revised: 05/01/2013] [Accepted: 05/04/2013] [Indexed: 11/30/2022]
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31
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Galluzzi M, Zhang S, Mohamadi S, Vakurov A, Podestà A, Nelson A. Interaction of imidazolium-based room-temperature ionic liquids with DOPC phospholipid monolayers: electrochemical study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:6573-6581. [PMID: 23654287 DOI: 10.1021/la400923d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
To test the biocompatible character of room-temperature ionic liquids (ILs), the interaction of various ILs with biological membrane (biomembrane) models was studied in this work. Dioleoyl phosphatidylcholine (DOPC) adsorbed on a mercury (Hg) electrode forms an impermeable defect-free monolayer which is a well established biomembrane model, prone to be studied by electrochemical techniques. We have monitored the modifications of the Hg supported monolayer caused by ILs using rapid cyclic voltammetry (RCV), alternating current voltammetry (ACV), and electrochemical impedance spectroscopy (EIS). A series of imidazolium-based ILs were investigated whose interaction highlighted the role of anion and lateral side chain of cation during the interaction with DOPC monolayers. It was shown that the hydrophobic and lipophilic character of the IL cations is a primary factor responsible for this interaction. Hg-supported monolayers provide an accurate analysis of the behavior of ILs at the interface of a biomembrane leading to a comprehensive understanding of the interaction mechanisms involved. At the same time, these experiments show that the Hg-phospholipid model is an effective toxicity sensing technique as shown by the correlation between literature in vivo toxicity data and the data from this study.
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Application of Infrared Spectroscopy for Structural Analysis of Planar Lipid Bilayers Under Electrochemical Control. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/b978-0-12-411515-6.00002-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
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33
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Papareddy P, Kalle M, Sørensen OE, Lundqvist K, Mörgelin M, Malmsten M, Schmidtchen A. Tissue factor pathway inhibitor 2 is found in skin and its C-terminal region encodes for antibacterial activity. PLoS One 2012; 7:e52772. [PMID: 23300768 PMCID: PMC3530512 DOI: 10.1371/journal.pone.0052772] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2012] [Accepted: 11/22/2012] [Indexed: 11/18/2022] Open
Abstract
Background Tissue factor pathway inhibitor 2 (TFPI-2) is a matrix-associated serine protease inhibitor with an enigmatic function in vivo. Here, we describe that TFPI-2 is present in fibrin of wounds and also expressed in skin, where it is up-regulated upon wounding. Methodology and Principal Findings Neutrophil elastase cleaved TFPI-2, and a C-terminal fragment was found to bind to bacteria. Similarly, a prototypic peptide representing this C-terminal part, EDC34, bound to bacteria and bacterial lipopolysaccharide, and induced bacterial permeabilization. The peptide also induced leakage in artificial liposomes, and displayed a random coil conformation upon interactions with liposomes as well as lipopolysaccharide. EDC34 was antibacterial against both Gram-negative and Gram-positive bacteria in physiological buffer conditions. Conclusions/Significance The results demonstrate that the C-terminus of TFPI-2 encodes for antimicrobial activity, and may be released during wounding.
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Affiliation(s)
- Praveen Papareddy
- Division of Dermatology and Venereology, Department of Clinical Sciences, Lund University, Biomedical Center, Lund, Sweden.
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34
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Ormategui N, Zhang S, Loinaz I, Brydson R, Nelson A, Vakurov A. Interaction of poly(N-isopropylacrylamide) (pNIPAM) based nanoparticles and their linear polymer precursor with phospholipid membrane models. Bioelectrochemistry 2012; 87:211-9. [DOI: 10.1016/j.bioelechem.2011.12.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Revised: 12/05/2011] [Accepted: 12/10/2011] [Indexed: 10/14/2022]
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35
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Singh S, Kasetty G, Schmidtchen A, Malmsten M. Membrane and lipopolysaccharide interactions of C-terminal peptides from S1 peptidases. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2012; 1818:2244-51. [DOI: 10.1016/j.bbamem.2012.03.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 03/23/2012] [Accepted: 03/26/2012] [Indexed: 11/30/2022]
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36
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Vakurov A, Brydson R, Nelson A. Electrochemical modeling of the silica nanoparticle-biomembrane interaction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:1246-1255. [PMID: 22142270 DOI: 10.1021/la203568n] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The interaction of amorphous colloidal silica (SiO(2)) nanoparticles of well-defined sizes with a dioleoyl phosphatidylcholine (DOPC) monolayer on a mercury (Hg) film electrode has been investigated. It was shown using electrochemical methods and microcalorimetry that particles interact with the monolayer, and the electrochemical data shows that the extent of interaction is inversely proportional to the particle size. Scanning electron microscopy (SEM) images of the electrode-supported monolayers following exposure to the particles shows that the nanoparticles bind to the DOPC monolayer irrespective of their size, forming a particle monolayer on the DOPC surface. A one-parameter model was developed to describe the electrochemical results where the fitted parameter is an interfacial layer thickness (3.2 nm). The model is based on the adsorptive interactions operating within this interfacial layer that are independent of the solution pH and solution ionic strength. The evidence implies that the most significant forces determining the interactions are van der Waals in character.
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Affiliation(s)
- Alexander Vakurov
- Centre for Molecular Nanoscience (CMNS), School of Chemistry, SPEME, University of Leeds LS2 9JT, UK.
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37
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Pasupuleti M, Schmidtchen A, Malmsten M. Antimicrobial peptides: key components of the innate immune system. Crit Rev Biotechnol 2011; 32:143-71. [PMID: 22074402 DOI: 10.3109/07388551.2011.594423] [Citation(s) in RCA: 494] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Life-threatening infectious diseases are on their way to cause a worldwide crisis, as treating them effectively is becoming increasingly difficult due to the emergence of antibiotic resistant strains. Antimicrobial peptides (AMPs) form an ancient type of innate immunity found universally in all living organisms, providing a principal first-line of defense against the invading pathogens. The unique diverse function and architecture of AMPs has attracted considerable attention by scientists, both in terms of understanding the basic biology of the innate immune system, and as a tool in the design of molecular templates for new anti-infective drugs. AMPs are gene-encoded short (<100 amino acids), amphipathic molecules with hydrophobic and cationic amino acids arranged spatially, which exhibit broad spectrum antimicrobial activity. AMPs have been the subject of natural evolution, as have the microbes, for hundreds of millions of years. Despite this long history of co-evolution, AMPs have not lost their ability to kill or inhibit the microbes totally, nor have the microbes learnt to avoid the lethal punch of AMPs. AMPs therefore have potential to provide an important breakthrough and form the basis for a new class of antibiotics. In this review, we would like to give an overview of cationic antimicrobial peptides, origin, structure, functions, and mode of action of AMPs, which are highly expressed and found in humans, as well as a brief discussion about widely abundant, well characterized AMPs in mammals, in addition to pharmaceutical aspects and the additional functions of AMPs.
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Affiliation(s)
- Mukesh Pasupuleti
- Department of Microbiology and Immunology, Centre for Microbial Diseases and Immunity Research, University of British Columbia, Vancouver, Canada.
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38
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Zhang S, Nelson A, Coldrick Z, Chen R. The effects of substituent grafting on the interaction of pH-responsive polymers with phospholipid monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:8530-8539. [PMID: 21657216 DOI: 10.1021/la105125d] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
pH-responsive amphiphilic polymers with suitable graftings have demonstrated highly efficient cell membrane activity and hence are promising applicants for drug-delivery. Grafting the hydrophobic amino acid l-phenylalanine and the hydrophilic methoxy poly(ethylene glycol) amine onto the pendant carboxylic acid moieties of a linear polyamide, poly(l-lysine isophthalamide), can effectively modify the amphiphilicity and conformation of the amphiphilic polymers. Here, the interactions of these polymers with phospholipid monolayers adsorbed on mercury (Hg) electrodes have been studied. AC voltammetry (ACV), rapid cyclic voltammetry (RCV), and electrochemical impedance spectroscopy (EIS) have been applied to monitor phospholipid monolayer associations with different polymer concentrations under different pH values. The polymers interact reversibly with the monolayer shown by altering the monolayer capacitance and inhibiting the phospholipid reorientation in electric field. Polymer grafting enhances the pH-mediated conformational change of the polymers which in turn increases their phospholipid monolayer activity. The most significant monolayer interactions have been observed with the polymer grafted with hydrophobic l-phenylalanine. A low level of PEGylation of the backbone also increases the monolayer activity. The polymer/DOPC interactions have been represented with an impedance model, which takes account of the interaction giving rise to an increase in monolayer capacitance and inhomogeneity and a Debye type dielectric relaxation. The extent of penetration of the polymers into the monolayer is inversely related to the electrical resistance they give rise to during the Debye relaxation. The cell membrane activities of these amphiphilic polymers have been successfully mirrored in this supported DOPC monolayer system, isolating the key parameters for biomembrane activities and giving insight into the mechanism of the interactions. The conclusions from this study provide strategic directions in material design catering to different requirements in biomedical applications.
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Affiliation(s)
- Shengwen Zhang
- Centre for Molecular Nanoscience (CMNS), School of Chemistry, University of Leeds, Leeds LS2 9JT, United Kingdom
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39
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High throughput systems for screening biomembrane interactions on fabricated mercury film electrodes. J APPL ELECTROCHEM 2011. [DOI: 10.1007/s10800-011-0319-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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40
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Nullmeier M, Koliwer-Brandl H, Kelm S, Zägel P, Koch KW, Brand I. Impact of Strong and Weak Lipid-Protein Interactions on the Structure of a Lipid Bilayer on a Gold Electrode Surface. Chemphyschem 2011; 12:1066-79. [DOI: 10.1002/cphc.201100036] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Revised: 02/07/2011] [Indexed: 01/13/2023]
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41
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Malmsten M, Kasetty G, Pasupuleti M, Alenfall J, Schmidtchen A. Highly selective end-tagged antimicrobial peptides derived from PRELP. PLoS One 2011; 6:e16400. [PMID: 21298015 PMCID: PMC3029338 DOI: 10.1371/journal.pone.0016400] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Accepted: 12/15/2010] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Antimicrobial peptides (AMPs) are receiving increasing attention due to resistance development against conventional antibiotics. Pseudomonas aeruginosa and Staphylococcus aureus are two major pathogens involved in an array of infections such as ocular infections, cystic fibrosis, wound and post-surgery infections, and sepsis. The goal of the study was to design novel AMPs against these pathogens. METHODOLOGY AND PRINCIPAL FINDINGS Antibacterial activity was determined by radial diffusion, viable count, and minimal inhibitory concentration assays, while toxicity was evaluated by hemolysis and effects on human epithelial cells. Liposome and fluorescence studies provided mechanistic information. Protease sensitivity was evaluated after subjection to human leukocyte elastase, staphylococcal aureolysin and V8 proteinase, as well as P. aeruginosa elastase. Highly active peptides were evaluated in ex vivo skin infection models. C-terminal end-tagging by W and F amino acid residues increased antimicrobial potency of the peptide sequences GRRPRPRPRP and RRPRPRPRP, derived from proline arginine-rich and leucine-rich repeat protein (PRELP). The optimized peptides were antimicrobial against a range of gram-positive S. aureus and gram-negative P. aeruginosa clinical isolates, also in the presence of human plasma and blood. Simultaneously, they showed low toxicity against mammalian cells. Particularly W-tagged peptides displayed stability against P. aeruginosa elastase, and S. aureus V8 proteinase and aureolysin, and the peptide RRPRPRPRPWWWW-NH(2) was effective against various "superbugs" including vancomycin-resistant enterococci, multi-drug resistant P. aeruginosa, and methicillin-resistant S. aureus, as well as demonstrated efficiency in an ex vivo skin wound model of S. aureus and P. aeruginosa infection. CONCLUSIONS/SIGNIFICANCE Hydrophobic C-terminal end-tagging of the cationic sequence RRPRPRPRP generates highly selective AMPs with potent activity against multiresistant bacteria and efficiency in ex vivo wound infection models. A precise "tuning" of toxicity and proteolytic stability may be achieved by changing tag-length and adding W- or F-amino acid tags.
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Affiliation(s)
| | - Gopinath Kasetty
- Division of Dermatology and Venereology, Department of Clinical Sciences, Lund University, Lund, Sweden
| | - Mukesh Pasupuleti
- Division of Dermatology and Venereology, Department of Clinical Sciences, Lund University, Lund, Sweden
| | | | - Artur Schmidtchen
- Division of Dermatology and Venereology, Department of Clinical Sciences, Lund University, Lund, Sweden
- * E-mail:
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Orädd G, Schmidtchen A, Malmsten M. Effects of peptide hydrophobicity on its incorporation in phospholipid membranes — an NMR and ellipsometry study. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2011; 1808:244-52. [DOI: 10.1016/j.bbamem.2010.08.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Revised: 08/13/2010] [Accepted: 08/20/2010] [Indexed: 12/17/2022]
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Al-Kaddah S, Reder-Christ K, Klocek G, Wiedemann I, Brunschweiger M, Bendas G. Analysis of membrane interactions of antibiotic peptides using ITC and biosensor measurements. Biophys Chem 2010; 152:145-52. [PMID: 20934241 DOI: 10.1016/j.bpc.2010.09.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2010] [Revised: 09/15/2010] [Accepted: 09/15/2010] [Indexed: 11/18/2022]
Abstract
The interaction of the lantibiotic gallidermin and the glycopeptide antibiotic vancomycin with bacterial membranes was simulated using mass sensitive biosensors and isothermal titration calorimetry (ITC). Both peptides interfere with cell wall biosynthesis by targeting the cell wall precursor lipid II, but differ clearly in their antibiotic activity against individual bacterial strains. We determined the binding affinities of vancomycin and gallidermin to model membranes±lipid II in detail. Both peptides bind to DOPC/lipid II membranes with high affinity (K(D) 0.30 μM and 0.27 μM). Gallidermin displayed also strong affinity to pure DOPC membranes (0.53 μM) an effect that was supported by ITC measurements. A surface acoustic wave (SAW) sensor allowed measurements in the picomolar concentration range and revealed that gallidermin targets lipid II at an equimolar ratio and simultaneously inserts into the bilayer. These results indicate that gallidermin, in contrast to vancomycin, combines cell wall inhibition and interference with the bacterial membrane integrity for potent antimicrobial activity.
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Affiliation(s)
- Saad Al-Kaddah
- Department of Pharmacy, Rheinische Friedrich Wilhelms University Bonn, An der Immenburg 4, 53121 Bonn, Germany
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Abstract
This article describes efforts to build a model biological membrane at a surface of a gold electrode. In this architecture, the membrane may be exposed to static electric fields on the order of 10(7) to 10(8) V m(-1). These fields are comparable in magnitude to the static electric field acting on a natural biological membrane. The field may be conveniently used to manipulate organic molecules within the membrane. By turning a knob on the control instrument one can deposit or lift the membrane from the gold surface. Electrochemical techniques can be used to control the physical state of the film while the infrared reflection absorption spectroscopy (IRRAS), surface imaging by STM and AFM and neutron scattering techniques can be employed to study conformational changes of organic molecules and their ordering within the membrane. This is shown on examples of membranes built of a simple zwitterionic phospholipid such as 1,2-dimyristoyl-sn-glycero-3-phosphatidylcholine (DMPC) and a mixed membrane composed of DMPC and cholesterol. The results illustrate the tremendous effect of cholesterol on the membrane structure. Two methods of membrane deposition at the electrode surface, namely by unilamellar vesicles fusion and using the Langmuir-Blodgett technique, are compared. Applications of these model systems to study interactions of small antibiotic peptides with lipids are discussed.
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Affiliation(s)
- Jacek Lipkowski
- Department of Chemistry, University of Guelph, Guelph, Ontario, CanadaN1G 2W1.
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Electrochemical impedance spectroscopy in label-free biosensor applications: multivariate data analysis for an objective interpretation. Anal Bioanal Chem 2010; 398:2341-9. [DOI: 10.1007/s00216-010-4027-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2010] [Revised: 06/24/2010] [Accepted: 07/12/2010] [Indexed: 10/19/2022]
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Protopapa E, Ringstad L, Aggeli A, Nelson A. Interaction of self-assembling β-sheet peptides with phospholipid monolayers: The effect of serine, threonine, glutamine and asparagine amino acid side chains. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.01.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ringstad L, Schmidtchen A, Malmsten M. Effects of single amino acid substitutions on peptide interaction with lipid membranes and bacteria–variants of GKE21, an internal sequence from human LL-37. Colloids Surf A Physicochem Eng Asp 2010. [DOI: 10.1016/j.colsurfa.2009.04.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Bysell H, Hansson P, Schmidtchen A, Malmsten M. Effect of Hydrophobicity on the Interaction between Antimicrobial Peptides and Poly(acrylic acid) Microgels. J Phys Chem B 2010; 114:1307-13. [DOI: 10.1021/jp910068t] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Helena Bysell
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden, Section of Dermatology and Venereology, Department of Clinical Sciences, Lund University, SE-221 84 Lund, Sweden
| | - Per Hansson
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden, Section of Dermatology and Venereology, Department of Clinical Sciences, Lund University, SE-221 84 Lund, Sweden
| | - Artur Schmidtchen
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden, Section of Dermatology and Venereology, Department of Clinical Sciences, Lund University, SE-221 84 Lund, Sweden
| | - Martin Malmsten
- Department of Pharmacy, Uppsala University, P.O. Box 580, SE-751 23 Uppsala, Sweden, Section of Dermatology and Venereology, Department of Clinical Sciences, Lund University, SE-221 84 Lund, Sweden
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Bysell H, Schmidtchen A, Malmsten M. Binding and release of consensus peptides by poly(acrylic acid) microgels. Biomacromolecules 2009; 10:2162-8. [PMID: 19583241 DOI: 10.1021/bm9003354] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The interaction between positively charged consensus peptides and poly(acrylic acid) microgels was investigated with micromanipulator-assisted light microscopy and confocal laser scanning microscopy. Peptide binding and release was monitored by microgel deswelling and swelling for monodisperse multiples of heparin-binding Cardin and Weintraub motifs, (AKKARA)(n) (1 <or= n <or= 4) and (ARKKAAKA)(n) (1 <or= n <or= 3), as well as the corresponding titratable (AHHAHA)(4) and (AHHHAAHA)(3) peptides (A, K, R and H, refering to alanine, lysine, arginine, and histidine, respectively). When fully charged, these peptides distribute homogenously throughout the microgels and display concentration-dependent deswelling, which increases with increasing peptide length. Both (AKKARA)(4) and (ARKKAAKA)(3) display potent and fast microgel deswelling but only marginal subsequent electrolyte-induced desorption. In contrast, reducing the peptide charge for (AHHAHA)(4) and (AHHHAAHA)(3) at neutral and high pH, or the peptide length, substantially reduces the peptide affinity for the microgels and facilitates rapid peptide release. Taken together, the results also show that quite short peptides of moderate charge density interact strongly and cause extensive gel deswelling of oppositely charged microgels, precluding peptide release. They also show, however, that desirable triggered release can be achieved with peptides of lower charge density.
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Affiliation(s)
- Helena Bysell
- Department of Pharmacy, Uppsala University, SE-751 23 Uppsala, Sweden.
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