101
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Panahi Chegini P, Nikokar I, Tabarzad M, Faezi S, Mahboubi A. Effect of Amino Acid Substitutions on Biological Activity of Antimicrobial Peptide: Design, Recombinant Production, and Biological Activity. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH : IJPR 2019; 18:157-168. [PMID: 32802096 PMCID: PMC7393060 DOI: 10.22037/ijpr.2019.112397.13734] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Recently, antimicrobial peptides have been introduced as potent antibiotics with a wide range of antimicrobial activities. They have also exhibited other biological activities, including anti-inflammatory, growth stimulating, and anti-cancer activities. In this study, an analog of Magainin II was designed and produced as a recombinant fusion protein. The designed sequence contained 24 amino acid residues (P24), in which Lys, His, Ser residues were substituted with Arg and also, hydrophobic Phe was replaced with Trp. Recombinant production of P24 in Escherichia coli (E. coli) BL21 using pTYB21, containing chitin binding domain and intein sequence at the N-terminus of the peptide gene, resulted in 1 μg mL-1 product from culture. Chitin column chromatography, followed by online peptide cleavage with thiol reducing agent was applied to purify the peptide. Antimicrobial activity was evaluated using five bacteria strains including Staphylococcus aureus, Enterococcus faecalis, Klebsiella pneumonia, E. coli, and Pseudomonas aeruginosa. Designed AMP exhibited promising antimicrobial activities with low minimum inhibitory concentration, in the range of 64-256 µg/mL. P24 showed potent antimicrobial activity preferably against Gram-positive bacteria, and more potent than pexiganan as a successful Magainin II analog for topical infections. In general, further modification can be applied to improve its therapeutic index.
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Affiliation(s)
- Parvaneh Panahi Chegini
- Department of Medicinal Biotechnology, School of Paramedicine, Guilan University of Medical Sciences, Rasht, Iran.
- Medical Biotechnology Research Center, School of Paramedicine, Guilan University of Medical Sciences, Rasht, Iran.
| | - Iraj Nikokar
- Department of Medicinal Biotechnology, School of Paramedicine, Guilan University of Medical Sciences, Rasht, Iran.
- Medical Biotechnology Research Center, School of Paramedicine, Guilan University of Medical Sciences, Rasht, Iran.
| | - Maryam Tabarzad
- Protein Technology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Sobhan Faezi
- Medical Biotechnology Research Center, School of Paramedicine, Guilan University of Medical Sciences, Rasht, Iran.
| | - Arash Mahboubi
- Department of Pharmaceutics, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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102
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Juretić D, Sonavane Y, Ilić N, Gajski G, Goić-Barišić I, Tonkić M, Kozic M, Maravić A, Pellay FX, Zoranić L. Designed peptide with a flexible central motif from ranatuerins adapts its conformation to bacterial membranes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2018; 1860:2655-2668. [DOI: 10.1016/j.bbamem.2018.10.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Revised: 09/28/2018] [Accepted: 10/03/2018] [Indexed: 12/11/2022]
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103
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Wang C, Feng S, Qie J, Wei X, Yan H, Liu K. Polyion complexes of a cationic antimicrobial peptide as a potential systemically administered antibiotic. Int J Pharm 2018; 554:284-291. [PMID: 30439489 DOI: 10.1016/j.ijpharm.2018.11.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 11/09/2018] [Accepted: 11/12/2018] [Indexed: 12/12/2022]
Abstract
Antimicrobial peptides (AMPs) are regarded as next-generation antibiotics to replace conventional antibiotics due to their rapid and broad-spectrum antimicrobial properties and far less sensitivity to the development of pathogen resistance. However, they are susceptible to proteolysis in vivo by endogenous or bacterial proteases as well as induce the lysis of red blood cells, which prevent their intravenous applications. In this work, polyion complex (PIC) micelles of the cationic AMP MSI-78 and the anionic copolymer methoxy poly(ethylene glycol)-b-poly(α-glutamic acid) (mPEG-b-PGlu) were prepared to develop novel antimicrobial agents for potential application in vivo. With an increase in molar ratio of mPEG-b-PGlu to MSI-78, the complexation ability of the PIC micelles increased. FITC-labeled MSI-78 showed a sustained release from the PIC micelles. More importantly, these PIC micelles greatly decreased the hemolytic toxicity of MSI-78 to human red blood cells, without influencing its antimicrobial activity. Thus, this approach could be used as a suitable in vivo delivery method of AMPs in the future.
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Affiliation(s)
- Chenhong Wang
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology & Toxicology, Beijing 100850, China
| | - Siliang Feng
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology & Toxicology, Beijing 100850, China
| | - Jiankun Qie
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology & Toxicology, Beijing 100850, China
| | - Xiaoli Wei
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology & Toxicology, Beijing 100850, China
| | - Husheng Yan
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China.
| | - Keliang Liu
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology & Toxicology, Beijing 100850, China.
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104
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Miranda C, Booth VK, Morrow MR. Effects of Amphipathic Polypeptides on Membrane Organization Inferred from Studies Using Bicellar Lipid Mixtures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:11759-11771. [PMID: 30196696 DOI: 10.1021/acs.langmuir.8b02257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
SP-B63-78, a lung surfactant protein fragment, and magainin 2, an antimicrobial peptide, are amphipathic peptides with the same overall charge but different biological functions. Deuterium nuclear magnetic resonance has been used to compare the interactions of these peptides with dispersions of 1,2-dimyristoyl- sn-glycero-3-phophocholine (DMPC)/1,2-dihexanoyl- sn-glycero-3-phophocholine (DHPC) (4:1) and DMPC/1,2-dimyristoyl- sn-glycero-3-phopho-(1'-rac-glycerol) (DMPG)/DHPC (3:1:1), two mixtures of long-chain and short-chain lipids that display bicellar behavior. This study exploited the sensitivity of a bicellar system structural organization to factors that modify partitioning of their lipid components between different environments. In small bicelle particles formed at low temperatures, short-chain components preferentially occupy curved rim environments around bilayer disks of the long-chain components. Changes in chain order and lipid mixing, on heating, can drive transitions to more extended assemblies including a magnetically orientable phase at intermediate temperature. In this work, neither peptide had a substantial effect on the behavior of the zwitterionic DMPC/DHPC mixture. For bicellar mixtures containing the anionic lipid DMPG, the peptide SP-B63-78 lowered the temperature at which magnetically orientable particles coalesced into more extended lamellar structures. SP-B63-78 did not promote partitioning of the zwitterionic and anionic long-chain lipid components into different environments. Magainin 2, on the other hand, was found to promote separation of the anionic lipid, DMPG, and the zwitterionic lipid, DMPC, into different environments for temperatures above 34 °C. The contrast between the effects of these two peptides on the lipid mixtures studied appears to be consistent with their functional roles in biological systems.
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Affiliation(s)
- Chris Miranda
- Department of Physics and Physical Oceanography , Memorial University of Newfoundland , St. John's , Newfoundland and Labrador , Canada A1B 3X7
| | - Valerie K Booth
- Department of Biochemistry , Memorial University of Newfoundland , St. John's , Newfoundland and Labrador , Canada A1B 3X9
| | - Michael R Morrow
- Department of Physics and Physical Oceanography , Memorial University of Newfoundland , St. John's , Newfoundland and Labrador , Canada A1B 3X7
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105
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Roy R, Tiwari M, Donelli G, Tiwari V. Strategies for combating bacterial biofilms: A focus on anti-biofilm agents and their mechanisms of action. Virulence 2018; 9:522-554. [PMID: 28362216 PMCID: PMC5955472 DOI: 10.1080/21505594.2017.1313372] [Citation(s) in RCA: 725] [Impact Index Per Article: 120.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Biofilm refers to the complex, sessile communities of microbes found either attached to a surface or buried firmly in an extracellular matrix as aggregates. The biofilm matrix surrounding bacteria makes them tolerant to harsh conditions and resistant to antibacterial treatments. Moreover, the biofilms are responsible for causing a broad range of chronic diseases and due to the emergence of antibiotic resistance in bacteria it has really become difficult to treat them with efficacy. Furthermore, the antibiotics available till date are ineffective for treating these biofilm related infections due to their higher values of minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC), which may result in in-vivo toxicity. Hence, it is critically important to design or screen anti-biofilm molecules that can effectively minimize and eradicate biofilm related infections. In the present article, we have highlighted the mechanism of biofilm formation with reference to different models and various methods used for biofilm detection. A major focus has been put on various anti-biofilm molecules discovered or tested till date which may include herbal active compounds, chelating agents, peptide antibiotics, lantibiotics and synthetic chemical compounds along with their structures, mechanism of action and their respective MICs, MBCs, minimum biofilm inhibitory concentrations (MBICs) as well as the half maximal inhibitory concentration (IC50) values available in the literature so far. Different mode of action of anti biofilm molecules addressed here are inhibition via interference in the quorum sensing pathways, adhesion mechanism, disruption of extracellular DNA, protein, lipopolysaccharides, exopolysaccharides and secondary messengers involved in various signaling pathways. From this study, we conclude that the molecules considered here might be used to treat biofilm-associated infections after significant structural modifications, thereby investigating its effective delivery in the host. It should also be ensured that minimum effective concentration of these molecules must be capable of eradicating biofilm infections with maximum potency without posing any adverse side effects on the host.
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Affiliation(s)
- Ranita Roy
- a Department of Biochemistry , Central University of Rajasthan , Ajmer , India
| | - Monalisa Tiwari
- a Department of Biochemistry , Central University of Rajasthan , Ajmer , India
| | - Gianfranco Donelli
- b Microbial Biofilm Laboratory, IRCCS Fondazione Santa Lucia , Rome , Italy
| | - Vishvanath Tiwari
- a Department of Biochemistry , Central University of Rajasthan , Ajmer , India
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106
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Sun B, Wibowo D, Sainsbury F, Zhao CX. Design and production of a novel antimicrobial fusion protein in Escherichia coli. Appl Microbiol Biotechnol 2018; 102:8763-8772. [PMID: 30120526 DOI: 10.1007/s00253-018-9319-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 07/24/2018] [Accepted: 08/08/2018] [Indexed: 11/25/2022]
Abstract
In recent years, antimicrobial peptides (AMPs) have attracted increasing attention. The microbial cells provide a simple, cost-effective platform to produce AMPs in industrial quantities. While AMP production as fusion proteins in microorganisms is commonly used, the recovery of AMPs necessitates the use of expensive proteases and extra purification steps. Here, we develop a novel fusion protein DAMP4-F-pexiganan comprising a carrier protein DAMP4 linked to the AMP, pexiganan, through a long, flexible linker. We show that this fusion protein can be purified using a non-chromatography approach and exhibits the same antimicrobial activity as the chemically synthesized pexiganan peptide without any cleavage step. Activity of the fusion protein is dependent on a long, flexible linker between the AMP and carrier domains, as well as on the expression conditions of the fusion protein, with low-temperature expression promoting better folding of the AMP domain. The production of DAMP4-F-pexiganan circumvents the time-consuming and costly steps of chromatography-based purification and enzymatic cleavages, therefore shows considerable advantages over traditional microbial production of AMPs. We expect this novel fusion protein, and the studies on the effect of linker and expression conditions on its antimicrobial activity, will broaden the rational design and production of antimicrobial products based on AMPs.
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Affiliation(s)
- Baode Sun
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, QLD, St Lucia, 4072, Australia
| | - David Wibowo
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, QLD, St Lucia, 4072, Australia.
- Griffith Institute for Drug Discovery, Griffith University, QLD, Nathan, 4111, Australia.
| | - Frank Sainsbury
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, QLD, St Lucia, 4072, Australia
| | - Chun-Xia Zhao
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, QLD, St Lucia, 4072, Australia.
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107
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Oliva R, Chino M, Pane K, Pistorio V, De Santis A, Pizzo E, D'Errico G, Pavone V, Lombardi A, Del Vecchio P, Notomista E, Nastri F, Petraccone L. Exploring the role of unnatural amino acids in antimicrobial peptides. Sci Rep 2018; 8:8888. [PMID: 29892005 PMCID: PMC5995839 DOI: 10.1038/s41598-018-27231-5] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 05/23/2018] [Indexed: 12/14/2022] Open
Abstract
Cationic antimicrobial peptides (CAMPs) are a promising alternative to treat multidrug-resistant bacteria, which have developed resistance to all the commonly used antimicrobial, and therefore represent a serious threat to human health. One of the major drawbacks of CAMPs is their sensitivity to proteases, which drastically limits their half-life. Here we describe the design and synthesis of three nine-residue CAMPs, which showed high stability in serum and broad spectrum antimicrobial activity. As for all peptides a very low selectivity between bacterial and eukaryotic cells was observed, we performed a detailed biophysical characterization of the interaction of one of these peptides with liposomes mimicking bacterial and eukaryotic membranes. Our results show a surface binding on the DPPC/DPPG vesicles, coupled with lipid domain formation, and, above a threshold concentration, a deep insertion into the bilayer hydrophobic core. On the contrary, mainly surface binding of the peptide on the DPPC bilayer was observed. These observed differences in the peptide interaction with the two model membranes suggest a divergence in the mechanisms responsible for the antimicrobial activity and for the observed high toxicity toward mammalian cell lines. These results could represent an important contribution to unravel some open and unresolved issues in the development of synthetic CAMPs.
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Affiliation(s)
- Rosario Oliva
- Department of Chemical Sciences, University of Naples "Federico II", via Cintia, I-80126, Naples, Italy
| | - Marco Chino
- Department of Chemical Sciences, University of Naples "Federico II", via Cintia, I-80126, Naples, Italy
| | - Katia Pane
- Department of Biology, University of Naples "Federico II", Via Cintia, I-80126, Naples, Italy
| | - Valeria Pistorio
- Department of Molecular Medicine and Medical Biotechnologies, University of Naples "Federico II", Via Pansini, 5, I-80131, Naples, Italy
| | - Augusta De Santis
- Department of Chemical Sciences, University of Naples "Federico II", via Cintia, I-80126, Naples, Italy
| | - Elio Pizzo
- Department of Biology, University of Naples "Federico II", Via Cintia, I-80126, Naples, Italy
| | - Gerardino D'Errico
- Department of Chemical Sciences, University of Naples "Federico II", via Cintia, I-80126, Naples, Italy
| | - Vincenzo Pavone
- Department of Chemical Sciences, University of Naples "Federico II", via Cintia, I-80126, Naples, Italy
| | - Angela Lombardi
- Department of Chemical Sciences, University of Naples "Federico II", via Cintia, I-80126, Naples, Italy
| | - Pompea Del Vecchio
- Department of Chemical Sciences, University of Naples "Federico II", via Cintia, I-80126, Naples, Italy
| | - Eugenio Notomista
- Department of Biology, University of Naples "Federico II", Via Cintia, I-80126, Naples, Italy
| | - Flavia Nastri
- Department of Chemical Sciences, University of Naples "Federico II", via Cintia, I-80126, Naples, Italy
| | - Luigi Petraccone
- Department of Chemical Sciences, University of Naples "Federico II", via Cintia, I-80126, Naples, Italy.
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108
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Structural Characterisation of Predicted Helical Regions in the Chironex fleckeri CfTX-1 Toxin. Mar Drugs 2018; 16:md16060201. [PMID: 29880743 PMCID: PMC6024933 DOI: 10.3390/md16060201] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 05/30/2018] [Accepted: 06/05/2018] [Indexed: 11/21/2022] Open
Abstract
The Australian jellyfish Chironex fleckeri, belongs to a family of cubozoan jellyfish known for their potent venoms. CfTX-1 and -2 are two highly abundant toxins in the venom, but there is no structural data available for these proteins. Structural information on toxins is integral to the understanding of the mechanism of these toxins and the development of an effective treatment. Two regions of CfTX-1 have been predicted to have helical structures that are involved with the mechanism of action. Here we have synthesized peptides corresponding to these regions and analyzed their structures using NMR spectroscopy. The peptide corresponding to the predicted N-terminal amphiphilic helix appears unstructured in aqueous solution. This lack of structure concurs with structural disorder predicted for this region of the protein using the Protein DisOrder prediction System PrDOS. Conversely, a peptide corresponding to a predicted transmembrane region is very hydrophobic, insoluble in aqueous solution and predicted to be structured by PrDOS. In the presence of SDS-micelles both peptides have well-defined helical structures showing that a membrane mimicking environment stabilizes the structures of both peptides and supports the prediction of the transmembrane region in CfTX-1. This is the first study to experimentally analyze the structure of regions of a C. fleckeri protein.
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109
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López
Cascales JJ, Zenak S, García de la Torre J, Lezama OG, Garro A, Enriz RD. Small Cationic Peptides: Influence of Charge on Their Antimicrobial Activity. ACS OMEGA 2018; 3:5390-5398. [PMID: 30221230 PMCID: PMC6130792 DOI: 10.1021/acsomega.8b00293] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 04/11/2018] [Indexed: 05/28/2023]
Abstract
The first stage of the action mechanism of small cationic peptides with antimicrobial activity is ruled by electrostatic interactions between the peptide and the pathogen cell membrane. Thus, an increase in its activity could be expected with an increase in the positive charge on the peptide. By contrast, the opposite behavior has been observed when the charge increases to reach a critical value, beyond which the activity falls. This work studies the perturbation effects in a cell membrane model for two small cationic peptides with similar length and morphology but with different cationic charges. The synthesis and antibacterial activity of the two peptides used in this study are described. The thermodynamic study associated with the insertion of these peptides into the membrane and the perturbing effects on the bilayer structure provide valuable insights into the molecular action mechanism associated with the charge of these small cationic peptides.
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Affiliation(s)
- José Javier López
Cascales
- Grupo
de Bioinformatica y Macromoleculas (BioMac), Area de Química
Física, Universidad Politécnica
de Cartagena, Aulario
II, Campus de Alfonso XIII, 30203 Cartagena, Murcia, Spain
| | - Siham Zenak
- Laboratoire
d’Etude Physique des Matériaux, Département de
Physique Energétique, Faculté de Physique, Université des Sciences et de la Technologie
d’Oran, BP 1505
El M’Naouer, Oran 31000, Algeria
| | - José García de la Torre
- Facultad
de Química, Departamento de Química Física, Universidad de Murcia, Campus de Espinardo, 30100 Espinardo, Murcia, Spain
| | | | - Adriana Garro
- Facultad
de Química, Bioquímica y Farmacia, IMIBIO-CONICET, Universidad Nacional de San Luis, Chacabuco 917, 5700 San Luis, Argentina
| | - Ricardo Daniel Enriz
- Facultad
de Química, Bioquímica y Farmacia, IMIBIO-CONICET, Universidad Nacional de San Luis, Chacabuco 917, 5700 San Luis, Argentina
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110
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Li Z, Hu Y, Yang Y, Lu Z, Wang Y. Antimicrobial resistance in livestock: antimicrobial peptides provide a new solution for a growing challenge. Anim Front 2018; 8:21-29. [PMID: 32002215 PMCID: PMC6951932 DOI: 10.1093/af/vfy005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Affiliation(s)
- Zhi Li
- Laboratory of Animal Nutrition and Feed Science, Department of Animal Science, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Yuhan Hu
- Laboratory of Animal Nutrition and Feed Science, Department of Animal Science, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Yuanyuan Yang
- Laboratory of Animal Nutrition and Feed Science, Department of Animal Science, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Zeqing Lu
- Laboratory of Animal Nutrition and Feed Science, Department of Animal Science, Zhejiang University, Hangzhou, Zhejiang Province, China
| | - Yizhen Wang
- Laboratory of Animal Nutrition and Feed Science, Department of Animal Science, Zhejiang University, Hangzhou, Zhejiang Province, China
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111
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Mukherjee S, Kar RK, Nanga RPR, Mroue KH, Ramamoorthy A, Bhunia A. Accelerated molecular dynamics simulation analysis of MSI-594 in a lipid bilayer. Phys Chem Chem Phys 2018; 19:19289-19299. [PMID: 28702543 DOI: 10.1039/c7cp01941f] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Multidrug resistance against the existing antibiotics is one of the most challenging threats across the globe. Antimicrobial peptides (AMPs), in this regard, are considered to be one of the effective alternatives that can overcome bacterial resistance. MSI-594, a 24-residue linear alpha-helical cationic AMP, has been shown to function via the carpet mechanism to disrupt bacterial membrane systems. To better understand the role of lipid composition in the function of MSI-594, in the present study, eight different model membrane systems have been studied using accelerated molecular dynamics (aMD) simulations. The simulated results are helpful in discriminating the particular effects of cationic MSI-594 against zwitterionic POPC, anionic POPG and POPS, and neutral POPE lipid moieties. Additionally, the effects of various heterogeneous POPC/POPG (7 : 3), POPC/POPS (7 : 3), and POPG/POPE (1 : 3 and 3 : 1) bilayer systems on the dynamic interaction of MSI-594 have also been investigated. The effect on the lipid bilayer due to the interaction with the peptide is characterized by lipid acyl-chain order, membrane thickness, and acyl-chain dynamics. Our simulation results show that the lipid composition affects the membrane interaction of MSI-594, suggesting that membrane selectivity is crucial to its mechanism of action. The results reported in this study are helpful to obtain accurate atomistic-level information governing MSI-594 and its membrane disruptive antimicrobial mechanism of action, and to design next generation potent antimicrobial peptides.
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Affiliation(s)
- Shruti Mukherjee
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700 054, India.
| | - Rajiv K Kar
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700 054, India.
| | - Ravi Prakash Reddy Nanga
- Biophysics Program and Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055, USA. and Department of Radiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Kamal H Mroue
- Biophysics Program and Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055, USA.
| | - Ayyalusamy Ramamoorthy
- Biophysics Program and Department of Chemistry, University of Michigan, Ann Arbor, MI 48109-1055, USA.
| | - Anirban Bhunia
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700 054, India.
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112
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The Road from Host-Defense Peptides to a New Generation of Antimicrobial Drugs. Molecules 2018; 23:molecules23020311. [PMID: 29389911 PMCID: PMC6017364 DOI: 10.3390/molecules23020311] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 01/23/2018] [Accepted: 01/30/2018] [Indexed: 01/28/2023] Open
Abstract
Host-defense peptides, also called antimicrobial peptides (AMPs), whose protective action has been used by animals for millions of years, fulfill many requirements of the pharmaceutical industry, such as: (1) broad spectrum of activity; (2) unlike classic antibiotics, they induce very little resistance; (3) they act synergically with conventional antibiotics; (4) they neutralize endotoxins and are active in animal models. However, it is considered that many natural peptides are not suitable for drug development due to stability and biodisponibility problems, or high production costs. This review describes the efforts to overcome these problems and develop new antimicrobial drugs from these peptides or inspired by them. The discovery process of natural AMPs is discussed, as well as the development of synthetic analogs with improved pharmacological properties. The production of these compounds at acceptable costs, using different chemical and biotechnological methods, is also commented. Once these challenges are overcome, a new generation of versatile, potent and long-lasting antimicrobial drugs is expected.
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113
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Ting CH, Chen YC, Wu CJ, Chen JY. Targeting FOSB with a cationic antimicrobial peptide, TP4, for treatment of triple-negative breast cancer. Oncotarget 2018; 7:40329-40347. [PMID: 27248170 PMCID: PMC5130011 DOI: 10.18632/oncotarget.9612] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Accepted: 05/02/2016] [Indexed: 12/31/2022] Open
Abstract
Triple-negative breast cancer (TNBC) currently lacks a suitable therapeutic candidate and is thus difficult to treat. Here, we report that a cationic antimicrobial peptide (CAP), tilapia piscidin 4 (TP4), which was derived from Nile tilapia (Oreochromis niloticus), is selectively toxic to TNBC. TP4 acts by inducing an AP-1 protein called FOSB, the expression of which is negatively associated with the pathological grade of TNBC. We show that TP4 is bound to the mitochondria where it disrupts calcium homeostasis and activates FOSB. FOSB overexpression results in TNBC cell death, whereas inhibition of calcium signaling eliminates FOSB induction and blocks TP4-induced TNBC cell death. Both TP4 and anthracyclines strongly induced FOSB, particularly in TNBC, indicating that FOSB may be suitable as a biomarker of drug responses. This study thus provides a novel therapeutic approach toward TNBC through FOSB induction.
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Affiliation(s)
- Chen-Hung Ting
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, Jiaushi, Ilan 262, Taiwan
| | - Yi-Chun Chen
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, Jiaushi, Ilan 262, Taiwan
| | - Chang-Jer Wu
- Department of Food Science, National Taiwan Ocean University, Keelung 202, Taiwan
| | - Jyh-Yih Chen
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, Jiaushi, Ilan 262, Taiwan
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114
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Kuppusamy R, Yasir M, Berry T, Cranfield CG, Nizalapur S, Yee E, Kimyon O, Taunk A, Ho KK, Cornell B, Manefield M, Willcox M, Black DS, Kumar N. Design and synthesis of short amphiphilic cationic peptidomimetics based on biphenyl backbone as antibacterial agents. Eur J Med Chem 2018; 143:1702-1722. [DOI: 10.1016/j.ejmech.2017.10.066] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 10/05/2017] [Accepted: 10/24/2017] [Indexed: 01/14/2023]
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115
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Hou Z, Shankar YV, Liu Y, Ding F, Subramanion JL, Ravikumar V, Zamudio-Vázquez R, Keogh D, Lim H, Tay MYF, Bhattacharjya S, Rice SA, Shi J, Duan H, Liu XW, Mu Y, Tan NS, Tam KC, Pethe K, Chan-Park MB. Nanoparticles of Short Cationic Peptidopolysaccharide Self-Assembled by Hydrogen Bonding with Antibacterial Effect against Multidrug-Resistant Bacteria. ACS APPLIED MATERIALS & INTERFACES 2017; 9:38288-38303. [PMID: 29028315 DOI: 10.1021/acsami.7b12120] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Cationic antimicrobial peptides (AMPs) and polymers are active against many multidrug-resistant (MDR) bacteria, but only a limited number of these compounds are in clinical use due to their unselective toxicity. The typical strategy for achieving selective antibacterial efficacy with low mammalian cell toxicity is through balancing the ratio of cationicity to hydrophobicity. Herein, we report a cationic nanoparticle self-assembled from chitosan-graft-oligolysine (CSM5-K5) chains with ultralow molecular weight (1450 Da) that selectively kills bacteria. Further, hydrogen bonding rather than the typical hydrophobic interaction causes the polymer chains to be aggregated together in water into small nanoparticles (with about 37 nm hydrodynamic radius) to concentrate the cationic charge of the lysine. When complexed with bacterial membrane, these cationic nanoparticles synergistically cluster anionic membrane lipids and produce a greater membrane perturbation and antibacterial effect than would be achievable by the same quantity of charge if dispersed in individual copolymer molecules in solution. The small zeta potential (+15 mV) and lack of hydrophobicity of the nanoparticles impedes the insertion of the copolymer into the cell bilayer to improve biocompatibility. In vivo study (using a murine excisional wound model) shows that CSM5-K5 suppresses the growth of methicillin-resistant Staphylococcus aureus (MRSA) bacteria by 4.0 orders of magnitude, an efficacy comparable to that of the last resort MRSA antibiotic vancomycin; it is also noninflammatory with little/no activation of neutrophils (CD11b and Ly6G immune cells). This study demonstrates a promising new class of cationic polymers-short cationic peptidopolysaccharides-that effectively attack MDR bacteria due to the synergistic clustering of, rather than insertion into, bacterial anionic lipids by the concentrated polymers in the resulting hydrogen-bonding-stabilized cationic nanoparticles.
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Affiliation(s)
| | | | - Yang Liu
- School of Biological Sciences, Nanyang Technological University , 62 Nanyang Drive, Singapore 637551, Singapore
| | | | | | - Vikashini Ravikumar
- Singapore Center for Environmental and Life Sciences (SCELSE) , 60 Nanyang Drive, Singapore 637551, Singapore
| | | | | | - Huiwen Lim
- Lee Kong Chian School of Medicine, Nanyang Technological University , 11 Mandalay Road, Singapore 308232, Singapore
| | - Moon Yue Feng Tay
- Nanyang Technological University Food Technology Centre (NAFTEC), Nanyang Technological University , 62 Nanyang Drive, Singapore 637459, Singapore
| | - Surajit Bhattacharjya
- School of Biological Sciences, Nanyang Technological University , 62 Nanyang Drive, Singapore 637551, Singapore
| | - Scott A Rice
- School of Biological Sciences, Nanyang Technological University , 62 Nanyang Drive, Singapore 637551, Singapore
- Singapore Center for Environmental and Life Sciences (SCELSE) , 60 Nanyang Drive, Singapore 637551, Singapore
| | - Jian Shi
- NUS Centre for Bioimaging Sciences, National University of Singapore , 14 Science Drive 4, Singapore 117557, Singapore
| | | | - Xue-Wei Liu
- Division of Chemistry and Biological Chemistry, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Yuguang Mu
- School of Biological Sciences, Nanyang Technological University , 62 Nanyang Drive, Singapore 637551, Singapore
| | - Nguan Soon Tan
- School of Biological Sciences, Nanyang Technological University , 62 Nanyang Drive, Singapore 637551, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University , 11 Mandalay Road, Singapore 308232, Singapore
| | - Kam C Tam
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo , 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Kevin Pethe
- Lee Kong Chian School of Medicine, Nanyang Technological University , 11 Mandalay Road, Singapore 308232, Singapore
| | - Mary B Chan-Park
- School of Biological Sciences, Nanyang Technological University , 62 Nanyang Drive, Singapore 637551, Singapore
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116
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Current and Emerging Topical Antibacterials and Antiseptics: Agents, Action, and Resistance Patterns. Clin Microbiol Rev 2017; 30:827-860. [PMID: 28592405 DOI: 10.1128/cmr.00112-16] [Citation(s) in RCA: 188] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Bacterial skin infections represent some of the most common infectious diseases globally. Prevention and treatment of skin infections can involve application of a topical antimicrobial, which may be an antibiotic (such as mupirocin or fusidic acid) or an antiseptic (such as chlorhexidine or alcohol). However, there is limited evidence to support the widespread prophylactic or therapeutic use of topical agents. Challenges involved in the use of topical antimicrobials include increasing rates of bacterial resistance, local hypersensitivity reactions (particularly to older agents, such as bacitracin), and concerns about the indiscriminate use of antiseptics potentially coselecting for antibiotic resistance. We review the evidence for the major clinical uses of topical antibiotics and antiseptics. In addition, we review the mechanisms of action of common topical agents and define the clinical and molecular epidemiology of antimicrobial resistance in these agents. Moreover, we review the potential use of newer and emerging agents, such as retapamulin and ebselen, and discuss the role of antiseptic agents in preventing bacterial skin infections. A comprehensive understanding of the clinical efficacy and drivers of resistance to topical agents will inform the optimal use of these agents to preserve their activity in the future.
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117
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Gomes A, Teixeira C, Ferraz R, Prudêncio C, Gomes P. Wound-Healing Peptides for Treatment of Chronic Diabetic Foot Ulcers and Other Infected Skin Injuries. Molecules 2017; 22:E1743. [PMID: 29057807 PMCID: PMC6151519 DOI: 10.3390/molecules22101743] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 10/06/2017] [Accepted: 10/12/2017] [Indexed: 12/20/2022] Open
Abstract
As the incidence of diabetes continues to increase in the western world, the prevalence of chronic wounds related to this condition continues to be a major focus of wound care research. Additionally, over 50% of chronic wounds exhibit signs and symptoms that are consistent with localized bacterial biofilms underlying severe infections that contribute to tissue destruction, delayed wound-healing and other serious complications. Most current biomedical approaches for advanced wound care aim at providing antimicrobial protection to the open wound together with a matrix scaffold (often collagen-based) to boost reestablishment of the skin tissue. Therefore, the present review is focused on the efforts that have been made over the past years to find peptides possessing wound-healing properties, towards the development of new and effective wound care treatments for diabetic foot ulcers and other skin and soft tissue infections.
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Affiliation(s)
- Ana Gomes
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, P-4169-007 Porto, Portugal.
| | - Cátia Teixeira
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, P-4169-007 Porto, Portugal.
| | - Ricardo Ferraz
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, P-4169-007 Porto, Portugal.
- Ciências Químicas e das Biomoléculas, Escola Superior de Saúde-Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 400, P-4200-072 Porto, Portugal.
| | - Cristina Prudêncio
- Ciências Químicas e das Biomoléculas, Escola Superior de Saúde-Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 400, P-4200-072 Porto, Portugal.
- i3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, P-4200-135 Porto, Portugal.
| | - Paula Gomes
- LAQV-REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre 687, P-4169-007 Porto, Portugal.
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118
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Pillong M, Hiss JA, Schneider P, Lin YC, Posselt G, Pfeiffer B, Blatter M, Müller AT, Bachler S, Neuhaus CS, Dittrich PS, Altmann KH, Wessler S, Schneider G. Rational Design of Membrane-Pore-Forming Peptides. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1701316. [PMID: 28799716 DOI: 10.1002/smll.201701316] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 06/29/2017] [Indexed: 06/07/2023]
Abstract
Specific interactions of peptides with lipid membranes are essential for cellular communication and constitute a central aspect of the innate host defense against pathogens. A computational method for generating innovative membrane-pore-forming peptides inspired by natural templates is presented. Peptide representation in terms of sequence- and topology-dependent hydrophobic moments is introduced. This design concept proves to be appropriate for the de novo generation of first-in-class membrane-active peptides with the anticipated mode of action. The designed peptides outperform the natural template in terms of their antibacterial activity. They form a kinked helical structure and self-assemble in the membrane by an entropy-driven mechanism to form dynamically growing pores that are dependent on the lipid composition. The results of this study demonstrate the unique potential of natural template-based peptide design for chemical biology and medicinal chemistry.
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Affiliation(s)
- Max Pillong
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Jan A Hiss
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Petra Schneider
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Yen-Chu Lin
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Gernot Posselt
- Department of Molecular Biology, University of Salzburg, 5020, Salzburg, Austria
| | - Bernhard Pfeiffer
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Markus Blatter
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Alex T Müller
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Simon Bachler
- Department of Biosystems Science and Engineering, ETH Zurich, 8093, Zurich, Switzerland
| | - Claudia S Neuhaus
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Petra S Dittrich
- Department of Biosystems Science and Engineering, ETH Zurich, 8093, Zurich, Switzerland
| | - Karl-Heinz Altmann
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
| | - Silja Wessler
- Department of Molecular Biology, University of Salzburg, 5020, Salzburg, Austria
| | - Gisbert Schneider
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093, Zurich, Switzerland
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119
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Trueman H, Sriskantha A, Qu Y, Rapson TD, Sutherland TD. Modification of Honeybee Silk by the Addition of Antimicrobial Agents. ACS OMEGA 2017; 2:4456-4463. [PMID: 30023723 PMCID: PMC6044942 DOI: 10.1021/acsomega.7b00694] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Accepted: 07/28/2017] [Indexed: 06/08/2023]
Abstract
Honeybee silk proteins can be produced at high levels in recombinant systems, fabricated into materials, and are tolerant of amino acid modifications: properties that make them exciting templates for designing new functional materials. Here, we explore the properties of materials either made from silk-antimicrobial peptide (AMP) fusion proteins or silk containing entrapped AMPs or silver nanoparticles. Inclusion of AMP within the silk protein sequence did not affect our ability to express the proteins or process them into films. When AMP-silk proteins and Escherichia coli cells were coincubated in solution, a reduction in cell numbers was observed after degradation of the chimeric protein to release a truncated version of the AMP. In films, the AMP was retained in the silk with leaching rates of <1% per day. Films containing silver nanoparticles were antimicrobial, with the silk preventing aggregation of nanoparticles and slowing the rate of dissolution of the particles.
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Affiliation(s)
| | | | - Yue Qu
- Department
of Infectious Diseases, The Alfred Hospital, 4/55 Commercial Rd., Melbourne 3004 Victoria, Australia
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120
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Booth V, Warschawski DE, Santisteban NP, Laadhari M, Marcotte I. Recent progress on the application of 2H solid-state NMR to probe the interaction of antimicrobial peptides with intact bacteria. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2017; 1865:1500-1511. [PMID: 28844739 DOI: 10.1016/j.bbapap.2017.07.018] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 07/13/2017] [Accepted: 07/25/2017] [Indexed: 10/19/2022]
Abstract
Discoveries relating to innate immunity and antimicrobial peptides (AMPs) granted Bruce Beutler and Jules Hoffmann a Nobel prize in medicine in 2011, and opened up new avenues for the development of therapies against infections, and even cancers. The mechanisms by which AMPs interact with, and ultimately disrupt, bacterial cell membranes is still, to a large extent, incompletely understood. Up until recently, this mechanism was studied using model lipid membranes that failed to reproduce the complexity of molecular interactions present in real cells comprising lipids but also membrane proteins, a cell wall containing peptidoglycan or lipopolysaccharides, and other molecules. In this review, we focus on recent attempts to study, at the molecular level, the interaction between cationic AMPs and intact bacteria, by 2H solid-state NMR. Specifically-labeled lipids allow us to focus on the interaction of AMPs with the heart of the bacterial membrane, and measure the lipid order and its variation upon interaction with various peptides. We will review the important parameters to consider in such a study, and summarize the results obtained in the past 5years on various peptides, in particular aurein 1.2, caerin 1.1, MSI-78 and CA(1-8)M(1-10). This article is part of a Special Issue entitled: Biophysics in Canada, edited by Lewis Kay, John Baenziger, Albert Berghuis and Peter Tieleman.
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Affiliation(s)
- Valerie Booth
- Department of Biochemistry, Memorial University of Newfoundland, St. John's, NL A1B 3X9, Canada; Department of Physics and Physical Oceanography, Memorial University of Newfoundland, St. John's, NL A1B 3X7, Canada
| | - Dror E Warschawski
- UMR 7099, CNRS - Université Paris Diderot, IBPC, 13 rue Pierre et Marie Curie, F-75005 Paris, France; Department of Chemistry, Université du Québec à Montréal, P.O. Box 8888, Downtown Station, Montréal H3C 3P8, Canada
| | - Nury P Santisteban
- Department of Physics and Physical Oceanography, Memorial University of Newfoundland, St. John's, NL A1B 3X7, Canada
| | - Marwa Laadhari
- Department of Chemistry, Université du Québec à Montréal, P.O. Box 8888, Downtown Station, Montréal H3C 3P8, Canada
| | - Isabelle Marcotte
- Department of Chemistry, Université du Québec à Montréal, P.O. Box 8888, Downtown Station, Montréal H3C 3P8, Canada.
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121
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Barbosa M, Vale N, Costa FM, Martins MCL, Gomes P. Tethering antimicrobial peptides onto chitosan: Optimization of azide-alkyne “click” reaction conditions. Carbohydr Polym 2017; 165:384-393. [DOI: 10.1016/j.carbpol.2017.02.050] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 02/11/2017] [Accepted: 02/14/2017] [Indexed: 12/17/2022]
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122
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Ageitos J, Sánchez-Pérez A, Calo-Mata P, Villa T. Antimicrobial peptides (AMPs): Ancient compounds that represent novel weapons in the fight against bacteria. Biochem Pharmacol 2017; 133:117-138. [DOI: 10.1016/j.bcp.2016.09.018] [Citation(s) in RCA: 328] [Impact Index Per Article: 46.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 09/19/2016] [Indexed: 01/01/2023]
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123
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Nakagami H, Yamaoka T, Hayashi M, Tanemura A, Takeya Y, Kurinami H, Sugimoto K, Nakamura A, Tomono K, Tamai K, Katayama I, Rakugi H, Kaneda Y. Physician-initiated first-in-human clinical study using a novel angiogenic peptide, AG30/5C, for patients with severe limb ulcers. Geriatr Gerontol Int 2017; 17:2150-2156. [PMID: 28488306 DOI: 10.1111/ggi.13051] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 01/13/2017] [Accepted: 02/20/2017] [Indexed: 12/15/2022]
Abstract
AIM In patients with diabetes or ischemia, angiogenesis and infection control are required for chronic leg ulcers, which substantially impair patients' quality of life. We developed a novel functional peptide, named AG30/5C, with angiogenic and anti-microbial properties. Treatment with AG30/5C significantly accelerated the wound healing of full-thickness defects in mice. To evaluate the safety of AG30/5C in the treatment of leg ulcers, a physician-initiated clinical study was carried out. METHODS The first-in-human trial was designed as an open-label treatment with AG30/5C (0.1 mg/mL) given twice per day for 11 days, and with a follow-up period of 17 days. The inclusion criteria for severe skin ulcers were: (i) diabetes or critical limb ischemia; (ii) resistance to standard therapy for 1 month; and (iii) detection of methicillin-resistant Staphylococcus aureus in the skin ulcer. RESULTS Four patients were enrolled in this study, and two patients met these criteria. For the evaluation of safety, three adverse effects were reported as possibly related to AG30/5C treatment; however, these adverse effects were not severe and resolved during or after treatment. Thus, there were no safety concerns. In both patients, the size of the ulcer decreased after treatment (44.62% and 10.23% decrease), and further decreased after the follow-up period (73.85% and 10.23% decrease). The former patient was diagnosed as Werner syndrome and the skin ulcer was resistant to standard therapy; however, it was sensitive to AG30/5C treatment. CONCLUSIONS Topical treatment with AG30/5C for severe leg ulcers was safe, well tolerated and effective. Geriatr Gerontol Int 2017; 17: 2150-2156.
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Affiliation(s)
- Hironori Nakagami
- Department of Health Development and Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Toshifumi Yamaoka
- Department of Dermatology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Misa Hayashi
- Department of Dermatology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Atsushi Tanemura
- Department of Dermatology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yasushi Takeya
- Department of Geriatric Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Hitomi Kurinami
- Department of Geriatric Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Ken Sugimoto
- Department of Geriatric Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Ayumi Nakamura
- Department of Pharmacy, Osaka University Hospital, Osaka, Japan
| | - Kazunori Tomono
- Division of Infection Control and Prevention, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Katsuto Tamai
- Department of Stem Cell Therapy Science, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Ichiro Katayama
- Department of Dermatology, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Hiromi Rakugi
- Department of Geriatric Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yasufumi Kaneda
- Division of Gene Therapy Science, Graduate School of Medicine, Osaka University, Osaka, Japan
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Yu TT, Nizalapur S, Ho KKK, Yee E, Berry T, Cranfield CG, Willcox M, Black DS, Kumar N. Design, Synthesis and Biological Evaluation of N-Sulfonylphenyl glyoxamide-Based Antimicrobial Peptide Mimics as Novel Antimicrobial Agents. ChemistrySelect 2017. [DOI: 10.1002/slct.201700336] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tsz Tin Yu
- School of Chemistry; University of New South Wales; Sydney, NSW 2052 Australia
| | | | - Kitty K. K. Ho
- School of Chemistry; University of New South Wales; Sydney, NSW 2052 Australia
| | - Eugene Yee
- School of Chemistry; University of New South Wales; Sydney, NSW 2052 Australia
- Children's Cancer Institute Australia; Lowy Cancer Research Centre, University of New South Wales; Sydney, NSW 2052 Australia
| | - Thomas Berry
- Molecular Biosciences Team; School of Life Sciences, University of Technology Sydney; Sydney Australia
| | - Charles G. Cranfield
- Molecular Biosciences Team; School of Life Sciences, University of Technology Sydney; Sydney Australia
| | - Mark Willcox
- School of Optometry and Vision Science; University of New South Wales; Sydney, NSW 2052 Australia
| | - David StC Black
- School of Chemistry; University of New South Wales; Sydney, NSW 2052 Australia
| | - Naresh Kumar
- School of Chemistry; University of New South Wales; Sydney, NSW 2052 Australia
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Assis LM, Nedeljković M, Dessen A. New strategies for targeting and treatment of multi-drug resistant Staphylococcus aureus. Drug Resist Updat 2017; 31:1-14. [PMID: 28867240 DOI: 10.1016/j.drup.2017.03.001] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 02/07/2017] [Accepted: 03/23/2017] [Indexed: 12/17/2022]
Abstract
Staphylococcus aureus is a major cause of bacterial infection in humans, and has been notoriously able to acquire resistance to a variety of antibiotics. An example is methicillin-resistant S. aureus (MRSA), which despite having been initially associated with clinical settings, now is one of the key causative agents of community-acquired infections. Antibiotic resistance in S. aureus involves mechanisms ranging from drug efflux to increased expression or mutation of target proteins, and this has required innovative approaches to develop novel treatment methodologies. This review provides an overview of the major mechanisms of antibiotic resistance developed by S. aureus, and describes the emerging alternatives being sought to circumvent infection and proliferation, including new generations of classic antibiotics, synergistic approaches, antibodies, and targeting of virulence factors.
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Affiliation(s)
- L Mayrink Assis
- Brazilian National Laboratory for Biosciences (LNBio), CNPEM, Campinas, São Paulo, Brazil
| | - M Nedeljković
- Institut de Biologie Structurale (IBS), Univ Grenoble Alpes, CEA, CNRS, Bacterial Pathogenesis Group, 38044 Grenoble, France
| | - A Dessen
- Brazilian National Laboratory for Biosciences (LNBio), CNPEM, Campinas, São Paulo, Brazil; Institut de Biologie Structurale (IBS), Univ Grenoble Alpes, CEA, CNRS, Bacterial Pathogenesis Group, 38044 Grenoble, France.
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126
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Bakka TA, Strøm MB, Andersen JH, Gautun OR. Synthesis and antimicrobial evaluation of cationic low molecular weight amphipathic 1,2,3-triazoles. Bioorg Med Chem Lett 2017; 27:1119-1123. [DOI: 10.1016/j.bmcl.2017.01.092] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 01/28/2017] [Indexed: 11/24/2022]
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127
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Nimmagadda A, Liu X, Teng P, Su M, Li Y, Qiao Q, Khadka NK, Sun X, Pan J, Xu H, Li Q, Cai J. Polycarbonates with Potent and Selective Antimicrobial Activity toward Gram-Positive Bacteria. Biomacromolecules 2017; 18:87-95. [PMID: 28064500 PMCID: PMC5267617 DOI: 10.1021/acs.biomac.6b01385] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The resistance developed by life-threatening bacteria toward conventional antibiotics has become a major concern in public health. To combat antibiotic resistance, there has been a significant interest in the development of antimicrobial cationic polymers due to the ease of synthesis and low manufacturing cost compared to host-defense peptides (HDPs). Herein, we report the design and synthesis of amphiphilic polycarbonates containing primary amino groups. These polymers exhibit potent antimicrobial activity and excellent selectivity to Gram-positive bacteria, including multidrug resistant pathogens. Fluorescence and TEM studies suggest that these polymers are likely to kill bacteria by disrupting bacterial membranes. These polymers also show low tendency to elicit resistance in bacteria. Their further development may lead to new antimicrobial agents combating drug-resistance.
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Affiliation(s)
- Alekhya Nimmagadda
- Department of Chemistry, University of South Florida, 4202 E. Fowler Ave, Tampa, FL 33620, U.S
| | - Xuan Liu
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P. R. China
| | - Peng Teng
- Department of Chemistry, University of South Florida, 4202 E. Fowler Ave, Tampa, FL 33620, U.S
| | - Ma Su
- Department of Chemistry, University of South Florida, 4202 E. Fowler Ave, Tampa, FL 33620, U.S
| | - Yaqiong Li
- Department of Chemistry, University of South Florida, 4202 E. Fowler Ave, Tampa, FL 33620, U.S
| | - Qiao Qiao
- Department of Chemistry, University of South Florida, 4202 E. Fowler Ave, Tampa, FL 33620, U.S
| | - Nawal K. Khadka
- Department of Physics, University of South Florida, 4202 E. Fowler Ave, Tampa, FL 33620, U.S
| | - Xiaoting Sun
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P. R. China
| | - Jianjun Pan
- Department of Physics, University of South Florida, 4202 E. Fowler Ave, Tampa, FL 33620, U.S
| | - Hai Xu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, HN 410083, P. R. China
| | - Qi Li
- Department of Medical Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P. R. China
| | - Jianfeng Cai
- Department of Chemistry, University of South Florida, 4202 E. Fowler Ave, Tampa, FL 33620, U.S
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128
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Woo SY, Lee H. Effect of lipid shape on toroidal pore formation and peptide orientation in lipid bilayers. Phys Chem Chem Phys 2017; 19:21340-21349. [DOI: 10.1039/c7cp02708g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Disordered and thinner bilayer w/lyso-lipids; tilted orientation of peptides in bilayer w/lyso-lipids; toroidal pores stabilized by peptides and lyso-lipids.
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Affiliation(s)
- Sun Young Woo
- Department of Chemical Engineering
- Dankook University
- Yongin
- South Korea
| | - Hwankyu Lee
- Department of Chemical Engineering
- Dankook University
- Yongin
- South Korea
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Zhao Y, Zhang M, Qiu S, Wang J, Peng J, Zhao P, Zhu R, Wang H, Li Y, Wang K, Yan W, Wang R. Antimicrobial activity and stability of the D-amino acid substituted derivatives of antimicrobial peptide polybia-MPI. AMB Express 2016; 6:122. [PMID: 27900727 PMCID: PMC5128008 DOI: 10.1186/s13568-016-0295-8] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 11/22/2016] [Indexed: 01/24/2023] Open
Abstract
Antimicrobial peptide has the potential to be developed as new kind of antimicrobial agents with novel action mechanism. However, the susceptibility to protease is a drawback for potential peptides to be clinical used. d-amino acid substitution can be one way to increase the proteolytic stability of peptides. In the present study, we synthesized the d-lysines substituted analog (d-lys-MPI) and the d-enantiomer of polybia-MPI (D-MPI) to improve the proteolytic resistance of polybia-MPI. Our results showed that, the stability of its d-amino acid partially substituted analog d-lys-MPI was increased. However, it lost antimicrobial activity at the tested concentration with the loss of α-helix content. As shown in the CD spectra, after substitution, the spectra of D-MPI is symmetrical to MPI, indicated it turned into left hand α-helical conformation. Excitingly, the stability of D-MPI toward the tested protease was improved greatly. Notably, the antimicrobial activity of D-MPI was comparable to its L-counterpart MPI, even improved. In addition, the hemolytic activity of D-MPI was lowered. This also indicated that the action target of antimicrobial peptide polybia-MPI was not chiral specific. So, D-MPI may offer a therapeutic strategy to defend the infection of microbes, considering its stability to protease and relatively lower cytotoxicity to human erythrocytes.
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130
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Jepson AK, Schwarz-Linek J, Ryan L, Ryadnov MG, Poon WCK. What Is the 'Minimum Inhibitory Concentration' (MIC) of Pexiganan Acting on Escherichia coli?-A Cautionary Case Study. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 915:33-48. [PMID: 27193536 DOI: 10.1007/978-3-319-32189-9_4] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
We measured the minimum inhibitory concentration (MIC) of the antimicrobial peptide pexiganan acting on Escherichia coli , and found an intrinsic variability in such measurements. These results led to a detailed study of the effect of pexiganan on the growth curve of E. coli, using a plate reader and manual plating (i.e. time-kill curves). The measured growth curves, together with single-cell observations and peptide depletion assays, suggested that addition of a sub-MIC concentration of pexiganan to a population of this bacterium killed a fraction of the cells, reducing peptide activity during the process, while leaving the remaining cells unaffected. This pharmacodynamic hypothesis suggests a considerable inoculum effect, which we quantified. Our results cast doubt on the use of the MIC as 'a measure of the concentration needed for peptide action' and show how 'coarse-grained' studies at the population level give vital information for the correct planning and interpretation of MIC measurements.
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Affiliation(s)
- Alys K Jepson
- SUPA and School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, Scotland, UK
| | - Jana Schwarz-Linek
- SUPA and School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, Scotland, UK
| | - Lloyd Ryan
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| | - Maxim G Ryadnov
- National Physical Laboratory, Hampton Road, Teddington, TW11 0LW, UK
| | - Wilson C K Poon
- SUPA and School of Physics and Astronomy, The University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, Scotland, UK.
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131
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Teyssières E, Corre JP, Antunes S, Rougeot C, Dugave C, Jouvion G, Claudon P, Mikaty G, Douat C, Goossens PL, Guichard G. Proteolytically Stable Foldamer Mimics of Host-Defense Peptides with Protective Activities in a Murine Model of Bacterial Infection. J Med Chem 2016; 59:8221-32. [DOI: 10.1021/acs.jmedchem.6b00144] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Emilie Teyssières
- Pathogénie
des Toxi-Infections Bactériennes, Institut Pasteur, 28
rue du Docteur Roux, 75724 Paris, France
| | - Jean-Philippe Corre
- Pathogénie
des Toxi-Infections Bactériennes, Institut Pasteur, 28
rue du Docteur Roux, 75724 Paris, France
| | - Stephanie Antunes
- Univ. Bordeaux, CBMN, UMR 5248, Institut Européen
de Chimie et Biologie, 2 rue Robert Escarpit, 33607 Pessac, France
- CNRS, CBMN, UMR 5248, F-33600 Pessac, France
| | - Catherine Rougeot
- Laboratoire
de Pharmacologie de la Douleur, Institut Pasteur, 28 rue du Docteur
Roux, 75724 Paris, France
| | - Christophe Dugave
- Institut
de Biologie et de Technologie de Saclay (iBiTec-S), Service de Chimie
Bio-organique et de Marquage, CEA-Saclay, bâtiment 547, 91191 Gif-sur-Yvette, France
| | - Grégory Jouvion
- Institut Pasteur, Histopathologie Humaine et Modèles
Animaux, 75724 Paris, France
- Paris Descartes Université, PRES Sorbonne-Paris-Cité, 75006 Paris, France
| | - Paul Claudon
- Univ. Bordeaux, CBMN, UMR 5248, Institut Européen
de Chimie et Biologie, 2 rue Robert Escarpit, 33607 Pessac, France
- CNRS, CBMN, UMR 5248, F-33600 Pessac, France
| | - Guillain Mikaty
- Pathogénie
des Toxi-Infections Bactériennes, Institut Pasteur, 28
rue du Docteur Roux, 75724 Paris, France
| | - Céline Douat
- Univ. Bordeaux, CBMN, UMR 5248, Institut Européen
de Chimie et Biologie, 2 rue Robert Escarpit, 33607 Pessac, France
- CNRS, CBMN, UMR 5248, F-33600 Pessac, France
| | - Pierre L. Goossens
- Pathogénie
des Toxi-Infections Bactériennes, Institut Pasteur, 28
rue du Docteur Roux, 75724 Paris, France
- Institut Pasteur, Histopathologie Humaine et Modèles
Animaux, 75724 Paris, France
| | - Gilles Guichard
- Univ. Bordeaux, CBMN, UMR 5248, Institut Européen
de Chimie et Biologie, 2 rue Robert Escarpit, 33607 Pessac, France
- CNRS, CBMN, UMR 5248, F-33600 Pessac, France
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132
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Silva JP, Appelberg R, Gama FM. Antimicrobial peptides as novel anti-tuberculosis therapeutics. Biotechnol Adv 2016; 34:924-940. [PMID: 27235189 DOI: 10.1016/j.biotechadv.2016.05.007] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 05/20/2016] [Accepted: 05/22/2016] [Indexed: 12/30/2022]
Abstract
Tuberculosis (TB), a disease caused by the human pathogen Mycobacterium tuberculosis, has recently joined HIV/AIDS as the world's deadliest infectious disease, affecting around 9.6 million people worldwide in 2014. Of those, about 1.2 million died from the disease. Resistance acquisition to existing antibiotics, with the subsequent emergence of Multi-Drug Resistant mycobacteria strains, together with an increasing economic burden, has urged the development of new anti-TB drugs. In this scope, antimicrobial peptides (AMPs), which are small, cationic and amphipathic peptides that make part of the innate immune system, now arise as promising candidates for TB treatment. In this review, we analyze the potential of AMPs for this application. We address the mechanisms of action, advantages and disadvantages over conventional antibiotics and how problems associated with its use may be overcome to boost their therapeutic potential. Additionally, we address the challenges of translational development from benchside to bedside, evaluate the current development pipeline and analyze the expected global impact from a socio-economic standpoint. The quest for more efficient and more compliant anti-TB drugs, associated with the great therapeutic potential of emerging AMPs and the rising peptide market, provide an optimal environment for the emergence of AMPs as promising therapies. Still, their pharmacological properties need to be enhanced and manufacturing-associated issues need to be addressed.
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Affiliation(s)
- João P Silva
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, Braga 4710-057, Portugal.
| | - Rui Appelberg
- Department of Immunophysiology, University of Porto, 4050-313 Porto, Portugal
| | - Francisco Miguel Gama
- CEB - Centre of Biological Engineering, University of Minho, Campus de Gualtar, Braga 4710-057, Portugal.
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133
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She F, Nimmagadda A, Teng P, Su M, Zuo X, Cai J. Helical 1:1 α/Sulfono-γ-AA Heterogeneous Peptides with Antibacterial Activity. Biomacromolecules 2016; 17:1854-9. [PMID: 27030636 DOI: 10.1021/acs.biomac.6b00286] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
As one of the greatest threats facing the 21st century, antibiotic resistance is now a major public health concern. Host-defense peptides (HDPs) offer an alternative approach to combat emerging multi-drug-resistant bacteria. It is known that helical HDPs such as magainin 2 and its analogs adopt cationic amphipathic conformations upon interaction with bacterial membranes, leading to membrane disruption and subsequent bacterial cell death. We have previously shown that amphipathic sulfono-γ-AApeptides could mimic magainin 2 and exhibit bactericidal activity. In this article, we demonstrate for the first time that amphipathic helical 1:1 α/sulfono-γ-AA heterogeneous peptides, in which regular amino acids and sulfono-γ-AApeptide building blocks are alternatively present in a 1:1 pattern, display potent antibacterial activity against both Gram-positive and Gram-negative bacterial pathogens. Small angle X-ray scattering (SAXS) suggests that the lead sequences adopt defined helical structures. The subsequent studies including fluorescence microscopy and time-kill experiments indicate that these hybrid peptides exert antimicrobial activity by mimicking the mechanism of HDPs. Our findings may lead to the development of HDP-mimicking antimicrobial peptidomimetics that combat drug-resistant bacterial pathogens. In addition, our results also demonstrate the effective design of a new class of helical foldamer, which could be employed to interrogate other important biological targets such as protein-protein interactions in the future.
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Affiliation(s)
- Fengyu She
- Department of Chemistry, University of South Florida , 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Alekhya Nimmagadda
- Department of Chemistry, University of South Florida , 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Peng Teng
- Department of Chemistry, University of South Florida , 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Ma Su
- Department of Chemistry, University of South Florida , 4202 East Fowler Avenue, Tampa, Florida 33620, United States
| | - Xiaobing Zuo
- X-ray Science Division, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Jianfeng Cai
- Department of Chemistry, University of South Florida , 4202 East Fowler Avenue, Tampa, Florida 33620, United States
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134
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Effects of neutrophils peptide-1 transgenic Chlorella ellipsoidea on the gut microbiota of male Sprague-Dawley rats, as revealed by high-throughput 16S rRNA sequencing. World J Microbiol Biotechnol 2016; 32:43. [PMID: 26873554 DOI: 10.1007/s11274-015-1994-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 12/07/2015] [Indexed: 02/01/2023]
Abstract
Rabbit neutrophils peptide-1 (NP-1) is a type of defensin that possesses a broad spectrum of antimicrobial activity. Chlorella ellipsoidea is a new eukaryotic expression system for exogenously producing NP-1. The NP-1 transgenic C. ellipsoidea can be directly added into feed as antimicrobial agent without any purification procedure for the NP-1 peptide. However, the effects of C. ellipsoidea and NP-1 on the host gut microbiota should be explored before application. In this study, diets containing different concentrations (1.25, 2.5, and 5%) of C. ellipsoidea and NP-1 transgenic C. ellipsoidea were administered to male Sprague-Dawley rats. Compared with the chow diet control group, none of the experimental groups showed any significant differences in their growth indices, and no histopathological damage was observed. The phylotypes of gut microbiota in the control group, the 5% C. ellipsoidea diet group and the 5% NP-1 transgenic C. ellipsoidea diet group were determined by 16S rRNA sequencing. The results showed that both 5% experimental groups had shifted community memberships of gut microbiota. In particular, the 5% NP-1 transgenic C. ellipsoidea diet exhibited an increased abundance of most Gram-positive bacterial taxa and a reduced abundance of most Gram-negative bacterial taxa, and it promoted the growth of some lactic acid bacterial genera. Lactic acid bacteria, especially the Bifidobacterium and Lactobacillus, have been widely reported to be benefic effects on the host. Thus NP-1 transgenic C. ellipsoidea is promising feed additive and gut regulator, as it have the potential to increase the abundance of Bifidobacterium and Lactobacillus in gut microbiota of animal.
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135
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Antibacterial Peptides: Opportunities for the Prevention and Treatment of Dental Caries. Probiotics Antimicrob Proteins 2016; 3:68. [PMID: 26781572 DOI: 10.1007/s12602-011-9076-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Dental caries is a multifactorial disease that is a growing and costly global health concern. The onset of disease is a consequence of an ecological imbalance within the dental plaque biofilm that favors specific acidogenic and aciduric caries pathogens, namely Streptococcus mutans and Streptococcus sobrinus. It is now recognized by the scientific and medical community that it is neither possible nor desirable to totally eliminate dental plaque. Conversely, the chemical biocides most commonly used for caries prevention and treatment indiscriminately attack all plaque microorganisms. These treatments also suffer from other drawbacks such as bad taste, irritability, and staining. Furthermore, the public demand for safe and natural personal hygiene products continues to rise. Therefore, there are opportunities that exist to develop new strategies for the treatment of this disease. As an alternative to conventional antibiotics, antibacterial peptides have been explored greatly over the last three decades for many different therapeutic uses. There are currently tens of hundreds of antibacterial peptides characterized across the evolutionary spectrum, and among these, many demonstrate physical and/or biological properties that may be suitable for a more targeted approach to the selective control or elimination of putative caries pathogens. Additionally, many peptides, such as nisin, are odorless, colorless, and tasteless and do not cause irritation or staining. This review focuses on antibacterial peptides for their potential role in the treatment and prevention of dental caries and suggests candidates that need to be explored further. Practical considerations for the development of antibacterial peptides as oral treatments are also discussed.
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136
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Li Y, Liew LSY, Li Q, Kang C. Structure of the transmembrane domain of human nicastrin-a component of γ-secretase. Sci Rep 2016; 6:19522. [PMID: 26776682 PMCID: PMC4726005 DOI: 10.1038/srep19522] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 12/09/2015] [Indexed: 02/04/2023] Open
Abstract
Nicastrin is the largest component of γ-secretase that is an intramembrane protease important in the development of Alzheimer's disease. Nicastrin contains a large extracellular domain, a single transmembrane (TM) domain, and a short C-terminus. Its TM domain is important for the γ-secretase complex formation. Here we report nuclear magnetic resonance (NMR) studies of the TM and C-terminal regions of human nicastrin in both sodium dodecyl sulfate (SDS) and dodecylphosphocholine (DPC) micelles. Structural study and dynamic analysis reveal that the TM domain is largely helical and stable under both SDS and DPC micelles with its N-terminal region undergoing intermediate time scale motion. The TM helix contains a hydrophilic patch that is important for TM-TM interactions. The short C-terminus is not structured in solution and a region formed by residues V697-A702 interacts with the membrane, suggesting that these residues may play a role in the γ-secretase complex formation. Our study provides structural insight into the function of the nicastrin TM domain and the C-terminus in γ-secretase complex.
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Affiliation(s)
- Yan Li
- Experimental Therapeutics Centre, Agency for Science, Technology and Research (A*STAR), Singapore, 138669 Singapore
| | - Lynette Sin Yee Liew
- Experimental Therapeutics Centre, Agency for Science, Technology and Research (A*STAR), Singapore, 138669 Singapore
| | - Qingxin Li
- Institute of Chemical &Engineering Sciences, Agency for Science, Technology and Research (A*STAR), Singapore, 138669 Singapore
| | - CongBao Kang
- Experimental Therapeutics Centre, Agency for Science, Technology and Research (A*STAR), Singapore, 138669 Singapore
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137
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Nigro E, Colavita I, Sarnataro D, Scudiero O, Zambrano G, Granata V, Daniele A, Carotenuto A, Galdiero S, Folliero V, Galdiero M, Urbanowicz RA, Ball JK, Salvatore F, Pessi A. An ancestral host defence peptide within human β-defensin 3 recapitulates the antibacterial and antiviral activity of the full-length molecule. Sci Rep 2015; 5:18450. [PMID: 26688341 PMCID: PMC4685272 DOI: 10.1038/srep18450] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 11/09/2015] [Indexed: 12/21/2022] Open
Abstract
Host defence peptides (HDPs) are critical components of innate immunity. Despite their diversity, they share common features including a structural signature, designated "γ-core motif". We reasoned that for each HDPs evolved from an ancestral γ-core, the latter should be the evolutionary starting point of the molecule, i.e. it should represent a structural scaffold for the modular construction of the full-length molecule, and possess biological properties. We explored the γ-core of human β-defensin 3 (HBD3) and found that it: (a) is the folding nucleus of HBD3; (b) folds rapidly and is stable in human serum; (c) displays antibacterial activity; (d) binds to CD98, which mediates HBD3 internalization in eukaryotic cells; (e) exerts antiviral activity against human immunodeficiency virus and herpes simplex virus; and (f) is not toxic to human cells. These results demonstrate that the γ-core within HBD3 is the ancestral core of the full-length molecule and is a viable HDP per se, since it is endowed with the most important biological features of HBD3. Notably, the small, stable scaffold of the HBD3 γ-core can be exploited to design disease-specific antimicrobial agents.
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Affiliation(s)
- Ersilia Nigro
- CEINGE-Biotecnologie Avanzate, Via Gaetano Salvatore 486, 80145 Napoli, Italy
| | - Irene Colavita
- CEINGE-Biotecnologie Avanzate, Via Gaetano Salvatore 486, 80145 Napoli, Italy
| | - Daniela Sarnataro
- CEINGE-Biotecnologie Avanzate, Via Gaetano Salvatore 486, 80145 Napoli, Italy.,Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Via Sergio Pansini 5, 80131 Napoli, Italy
| | - Olga Scudiero
- CEINGE-Biotecnologie Avanzate, Via Gaetano Salvatore 486, 80145 Napoli, Italy.,Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Via Sergio Pansini 5, 80131 Napoli, Italy
| | - Gerardo Zambrano
- CEINGE-Biotecnologie Avanzate, Via Gaetano Salvatore 486, 80145 Napoli, Italy
| | - Vincenzo Granata
- CEINGE-Biotecnologie Avanzate, Via Gaetano Salvatore 486, 80145 Napoli, Italy
| | - Aurora Daniele
- CEINGE-Biotecnologie Avanzate, Via Gaetano Salvatore 486, 80145 Napoli, Italy.,Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, Second University of Naples, Via Vivaldi 43, 81100 Caserta, Italy
| | - Alfonso Carotenuto
- Department of Pharmacy, University of Naples Federico II, Via Domenico Montesano 49, 80131 Napoli, Italy
| | - Stefania Galdiero
- Department of Pharmacy, University of Naples Federico II, Via Domenico Montesano 49, 80131 Napoli, Italy.,Institute of Biostructures and Bioimages, CNR, Naples, Italy
| | - Veronica Folliero
- Department of Experimental Medicine, Second University of Naples, Via Costantinopoli, 16, 80138 Napoli, Italy
| | - Massimiliano Galdiero
- Department of Experimental Medicine, Second University of Naples, Via Costantinopoli, 16, 80138 Napoli, Italy
| | - Richard A Urbanowicz
- The School of Life Sciences and the Nottingham Digestive Diseases Centre Biomedical Research Unit, The University of Nottingham, Queen's Medical Centre, Nottingham NG7 2UH, United Kingdom
| | - Jonathan K Ball
- The School of Life Sciences and the Nottingham Digestive Diseases Centre Biomedical Research Unit, The University of Nottingham, Queen's Medical Centre, Nottingham NG7 2UH, United Kingdom
| | - Francesco Salvatore
- CEINGE-Biotecnologie Avanzate, Via Gaetano Salvatore 486, 80145 Napoli, Italy.,IRCCS-SDN Foundation, Via Emanuele Gianturco 113, 80142 Napoli, Italy
| | - Antonello Pessi
- CEINGE-Biotecnologie Avanzate, Via Gaetano Salvatore 486, 80145 Napoli, Italy
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138
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Brannan AM, Whelan WA, Cole E, Booth V. Differential scanning calorimetry of whole Escherichia coli treated with the antimicrobial peptide MSI-78 indicate a multi-hit mechanism with ribosomes as a novel target. PeerJ 2015; 3:e1516. [PMID: 26713257 PMCID: PMC4690349 DOI: 10.7717/peerj.1516] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 11/27/2015] [Indexed: 11/20/2022] Open
Abstract
Differential Scanning Calorimetry (DSC) of intact Escherichia coli (E. coli) was used to identify non-lipidic targets of the antimicrobial peptide (AMP) MSI-78. The DSC thermograms revealed that, in addition to its known lytic properties, MSI-78 also has a striking effect on ribosomes. MSI-78’s effect on DSC scans of bacteria was similar to that of kanamycin, an antibiotic drug known to target the 30S small ribosomal subunit. An in vitro transcription/translation assay helped confirm MSI-78’s targeting of ribosomes. The scrambled version of MSI-78 also affected the ribosome peak of the DSC scans, but required greater amounts of peptide to cause a similar effect to the unscrambled peptide. Furthermore, the effect of the scrambled peptide was not specific to the ribosomes; other regions of the DSC thermogram were also affected. These results suggest that MSI-78’s effects on E. coli are at least somewhat dependent on its particular structural features, rather than a sole function of its overall charge and hydrophobicity. When considered along with earlier work detailing MSI-78’s membrane lytic properties, it appears that MSI-78 operates via a multi-hit mechanism with multiple targets.
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Affiliation(s)
- Alexander M Brannan
- Department of Biochemistry, Memorial University of Newfoundland , St. John's Newfoundland and Labrador , Canada
| | - William A Whelan
- Department of Biochemistry, Memorial University of Newfoundland , St. John's Newfoundland and Labrador , Canada
| | - Emma Cole
- Department of Biochemistry, Memorial University of Newfoundland , St. John's Newfoundland and Labrador , Canada
| | - Valerie Booth
- Department of Biochemistry, Memorial University of Newfoundland , St. John's Newfoundland and Labrador , Canada ; Department of Physics and Physical Oceanography, Memorial University of Newfoundland , St. John's Newfoundland and Labrador , Canada
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139
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Shahmiri M, Enciso M, Mechler A. Controls and constrains of the membrane disrupting action of Aurein 1.2. Sci Rep 2015; 5:16378. [PMID: 26574052 PMCID: PMC4648102 DOI: 10.1038/srep16378] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 10/13/2015] [Indexed: 11/21/2022] Open
Abstract
Aurein 1.2 is a 13 residue antimicrobial peptide secreted by the Australian tree frog Litoria Aurea. It is a surface-acting membrane disrupting peptide that permeabilizes bacterial membranes via the carpet mechanism; the molecular details of this process are mostly unknown. Here the mechanism of action of Aurein 1.2 was investigated with an emphasis on the role of membrane charge and C-terminal amidation of the peptide. Using quartz crystal microbalance (QCM) fingerprinting it was found that the membrane charge correlates with membrane affinity of the peptide, however the binding and the membrane disrupting processes are not charge driven; increased membrane charge reduces the membrane disrupting activity. Coarse grain simulations revealed that phenylalanine residues act as membrane anchors. Accordingly Aurein 1.2 has the ability to bind to any membrane. Furthermore, bundling precludes membrane disruption in case of wild type peptides, while non C-terminal amidated peptides form random aggregates leading to detachment from the membrane. Hence C-terminal amidation is crucial for Aurein 1.2 action. Our results suggest that Aurein 1.2 acts via aggregation driven membrane penetration. The concomitant change in the tension of the outer leaflet imposes a spontaneous curvature on the membrane, leading to disintegration.
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Affiliation(s)
- Mahdi Shahmiri
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Bundoora Vic 3086, Australia
| | - Marta Enciso
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Bundoora Vic 3086, Australia
| | - Adam Mechler
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Bundoora Vic 3086, Australia
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140
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Lakshmaiah Narayana J, Chen JY. Antimicrobial peptides: Possible anti-infective agents. Peptides 2015; 72:88-94. [PMID: 26048089 DOI: 10.1016/j.peptides.2015.05.012] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 05/10/2015] [Accepted: 05/13/2015] [Indexed: 12/20/2022]
Abstract
Multidrug-resistant bacterial, fungal, viral, and parasitic infections are major health threats. The Infectious Diseases Society of America has expressed concern on the decrease of pharmaceutical companies working on antibiotic research and development. However, small companies, along with academic research institutes, are stepping forward to develop novel therapeutic methods to overcome the present healthcare situation. Among the leading alternatives to current drugs are antimicrobial peptides (AMPs), which are abundantly distributed in nature. AMPs exhibit broad-spectrum activity against a wide variety of bacteria, fungi, viruses, and parasites, and even cancerous cells. They also show potential immunomodulatory properties, and are highly responsive to infectious agents and innate immuno-stimulatory molecules. In recent years, many AMPs have undergone or are undergoing clinical development, and a few are commercially available for topical and other applications. In this review, we outline selected anion and cationic AMPs which are at various stages of development, from preliminary analysis to clinical drug development. Moreover, we also consider current production methods and delivery tools for AMPs, which must be improved for the effective use of these agents.
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Affiliation(s)
- Jayaram Lakshmaiah Narayana
- Doctoral Degree Program in Marine Biotechnology, Institute of Cellular and Orgasmic Biology, Academia Sinica and National Sun-Yat Sen University, Kaohsiung, Taiwan; Marine Research Station, Institute of Cellular and Orgasmic Biology, Academia Sinica, Jiaushi, Ilan, Taiwan
| | - Jyh-Yih Chen
- Marine Research Station, Institute of Cellular and Orgasmic Biology, Academia Sinica, Jiaushi, Ilan, Taiwan.
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141
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Jaskiewicz M, Orlowska M, Olizarowicz G, Migon D, Grzywacz D, Kamysz W. Rapid Screening of Antimicrobial Synthetic Peptides. Int J Pept Res Ther 2015; 22:155-161. [PMID: 27226784 PMCID: PMC4854934 DOI: 10.1007/s10989-015-9494-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/22/2015] [Indexed: 11/29/2022]
Abstract
Increasing resistance to conventional antibiotics among microorganisms is one of the leading problems of medicine nowadays. Antimicrobial peptides are compounds exhibiting both antibacterial and antifungal activities. However, it is difficult to predict whether a designed new compound would exhibit any biological activity. Moreover, purification of the peptides is one of the most time-consuming and expensive steps of the synthesis that sometimes leads to unnecessary loss of solvents and reagents. In our study we have developed a thin-layer chromatography (TLC) direct bioautography technique for rapid determination of antimicrobial activity of peptides without the necessity of high-performance liquid chromatography purification. In this assay, crude peptides were applied and separated on a TLC plate. Then, pre-prepared plates were dipped into microbial suspension and incubated under optimum conditions for bacteria and fungi as well. The activity of the tested compounds was visualized by spraying the TLC plates with a cell viability reagent, resazurin (7-hydroxy-3H-phenoxazin-3-one 10-oxide). Effectiveness of this assay was compared with minimal inhibitory concentration results obtained by broth microdilution assay. Interestingly, so far such a screening method has not been applied for this group of compounds.
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Affiliation(s)
- Maciej Jaskiewicz
- Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdansk, Al. Gen. J. Hallera 107, 80-416 Gdańsk, Poland
| | - Malgorzata Orlowska
- Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdansk, Al. Gen. J. Hallera 107, 80-416 Gdańsk, Poland
| | - Gabriela Olizarowicz
- Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdansk, Al. Gen. J. Hallera 107, 80-416 Gdańsk, Poland
| | - Dorian Migon
- Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdansk, Al. Gen. J. Hallera 107, 80-416 Gdańsk, Poland
| | | | - Wojciech Kamysz
- Department of Inorganic Chemistry, Faculty of Pharmacy, Medical University of Gdansk, Al. Gen. J. Hallera 107, 80-416 Gdańsk, Poland
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142
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Kozić M, Vukičević D, Simunić J, Rončević T, Antcheva N, Tossi A, Juretić D. Predicting the Minimal Inhibitory Concentration for Antimicrobial Peptides with Rana-Box Domain. J Chem Inf Model 2015; 55:2275-87. [PMID: 26332863 DOI: 10.1021/acs.jcim.5b00161] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The global spreading of multidrug resistance has motivated the search for new antibiotic classes including different types of antimicrobial peptides (AMPs). Computational methods for predicting activity in terms of the minimal inhibitory concentration (MIC) of AMPs can facilitate "in silico" design and reduce the cost of synthesis and testing. We have used an original method for separating training and test data sets, both of which contain the sequences and measured MIC values of non-homologous anuran peptides having the Rana-box disulfide motif at their C-terminus. Using a more flexible profiling methodology (sideways asymmetry moment, SAM) than the standard hydrophobic moment, we have developed a two-descriptor model to predict the bacteriostatic activity of Rana-box peptides against Gram-negative bacteria--the first multilinear quantitative structure-activity relationship model capable of predicting MIC values for AMPs of widely different lengths and low identity using such a small number of descriptors. Maximal values for SAMs, as defined and calculated in our method, furthermore offer new structural insight into how different segments of a peptide contribute to its bacteriostatic activity, and this work lays the foundations for the design of active artificial AMPs with this type of disulfide bridge.
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Affiliation(s)
- Mara Kozić
- Institute of Integrative Biology, University of Liverpool , Liverpool L69 7ZB, U.K
| | - Damir Vukičević
- Faculty of Science, University of Split , 21000 Split, Croatia
| | - Juraj Simunić
- Mediterranean Institute for Life Sciences , 21000 Split, Croatia
| | | | - Nikolinka Antcheva
- Department of Life Sciences, University of Trieste , 34127 Trieste, Italy
| | - Alessandro Tossi
- Department of Life Sciences, University of Trieste , 34127 Trieste, Italy
| | - Davor Juretić
- Faculty of Science, University of Split , 21000 Split, Croatia
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143
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Membrane interaction of a new synthetic antimicrobial lipopeptide sp-85 with broad spectrum activity. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2014.10.062] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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144
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Monteiro C, Pinheiro M, Fernandes M, Maia S, Seabra CL, Ferreira-da-Silva F, Reis S, Gomes P, Martins MCL. A 17-mer Membrane-Active MSI-78 Derivative with Improved Selectivity toward Bacterial Cells. Mol Pharm 2015; 12:2904-11. [DOI: 10.1021/acs.molpharmaceut.5b00113] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Claudia Monteiro
- I3S, Instituto de Investigação
e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB, Instituto de Engenharia Biomédica, Universidade do Porto, Rua do Campo Alegre 823, 4150-180 Porto, Portugal
| | - Marina Pinheiro
- UCIBIO-REQUIMTE, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Mariana Fernandes
- I3S, Instituto de Investigação
e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB, Instituto de Engenharia Biomédica, Universidade do Porto, Rua do Campo Alegre 823, 4150-180 Porto, Portugal
| | - Sílvia Maia
- UCIBIO-REQUIMTE, Departamento de Química e Bioquímica,
Faculdade de Ciências, Universidade do Porto, Rua do Campo
Alegre 687, 4169-007 Porto, Portugal
| | - Catarina L. Seabra
- I3S, Instituto de Investigação
e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB, Instituto de Engenharia Biomédica, Universidade do Porto, Rua do Campo Alegre 823, 4150-180 Porto, Portugal
- ICBAS, Instituto de Ciências
Biomédicas Abel Salazar, Universidade do Porto, Rua de Jorge
Viterbo Ferreira 228, 4050-313 Porto, Portugal
- IPATIMUP - Institute of Molecular Pathology and Immunology of the University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Frederico Ferreira-da-Silva
- I3S, Instituto de Investigação
e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- IBMC-Instituto de Biologia Celular e Molecular, Unidade
de Produção e Purificação de Proteínas, Universidade do Porto, Rua do Campo Alegre 823, 4150-180 Porto, Portugal
| | - Salette Reis
- UCIBIO-REQUIMTE, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Paula Gomes
- UCIBIO-REQUIMTE, Departamento de Química e Bioquímica,
Faculdade de Ciências, Universidade do Porto, Rua do Campo
Alegre 687, 4169-007 Porto, Portugal
| | - M. Cristina L. Martins
- I3S, Instituto de Investigação
e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB, Instituto de Engenharia Biomédica, Universidade do Porto, Rua do Campo Alegre 823, 4150-180 Porto, Portugal
- ICBAS, Instituto de Ciências
Biomédicas Abel Salazar, Universidade do Porto, Rua de Jorge
Viterbo Ferreira 228, 4050-313 Porto, Portugal
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145
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Vila-Farrés X, López-Rojas R, Pachón-Ibáñez ME, Teixidó M, Pachón J, Vila J, Giralt E. Sequence-activity relationship, and mechanism of action of mastoparan analogues against extended-drug resistant Acinetobacter baumannii. Eur J Med Chem 2015; 101:34-40. [PMID: 26114809 DOI: 10.1016/j.ejmech.2015.06.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Revised: 06/04/2015] [Accepted: 06/07/2015] [Indexed: 10/23/2022]
Abstract
The treatment of some infectious diseases can currently be very challenging since the spread of multi-, extended- or pan-resistant bacteria has considerably increased over time. On the other hand, the number of new antibiotics approved by the FDA has decreased drastically over the last 30 years. The main objective of this study was to investigate the activity of wasp peptides, specifically mastoparan and some of its derivatives against extended-resistant Acinetobacter baumannii. We optimized the stability of mastoparan in human serum since the specie obtained after the action of the enzymes present in human serum is not active. Thus, 10 derivatives of mastoparan were synthetized. Mastoparan analogues (guanidilated at the N-terminal, enantiomeric version and mastoparan with an extra positive charge at the C-terminal) showed the same activity against Acinetobacter baumannii as the original peptide (2.7 μM) and maintained their stability to more than 24 h in the presence of human serum compared to the original compound. The mechanism of action of all the peptides was carried out using a leakage assay. It was shown that mastoparan and the abovementioned analogues were those that released more carboxyfluorescein. In addition, the effect of mastoparan and its enantiomer against A. baumannii was studied using transmission electron microscopy (TEM). These results suggested that several analogues of mastoparan could be good candidates in the battle against highly resistant A. baumannii infections since they showed good activity and high stability.
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Affiliation(s)
- Xavier Vila-Farrés
- ISGlobal, Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain
| | - Rafael López-Rojas
- Biomedical Institute of Seville (IBiS), University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain
| | - Maria Eugenia Pachón-Ibáñez
- Biomedical Institute of Seville (IBiS), University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain
| | - Meritxell Teixidó
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona, Spain
| | - Jerónimo Pachón
- Biomedical Institute of Seville (IBiS), University Hospital Virgen del Rocío/CSIC/University of Seville, Seville, Spain
| | - Jordi Vila
- ISGlobal, Barcelona Ctr. Int. Health Res. (CRESIB), Hospital Clínic - Universitat de Barcelona, Barcelona, Spain; Department of Clinical Microbiology, CDB, Hospital Clinic, School of Medicine, University of Barcelona, Barcelona, Spain.
| | - Ernest Giralt
- Institute for Research in Biomedicine (IRB Barcelona), Barcelona, Spain; Department of Organic Chemistry, University of Barcelona, Barcelona, Spain.
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146
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Han E, Lee H. Structural effects of tachyplesin I and its linear derivative on their aggregation and mobility in lipid bilayers. J Mol Graph Model 2015; 59:123-8. [DOI: 10.1016/j.jmgm.2015.04.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Revised: 04/09/2015] [Accepted: 04/17/2015] [Indexed: 10/23/2022]
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147
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Kim YM, Kim NH, Lee JW, Jang JS, Park YH, Park SC, Jang MK. Novel chimeric peptide with enhanced cell specificity and anti-inflammatory activity. Biochem Biophys Res Commun 2015; 463:322-8. [PMID: 26028561 DOI: 10.1016/j.bbrc.2015.05.063] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 05/15/2015] [Indexed: 01/22/2023]
Abstract
An antimicrobial peptide (AMP), Hn-Mc, was designed by combining the N-terminus of HPA3NT3 and the C-terminus of melittin. This chimeric AMP exhibited potent antibacterial activity with low minimal inhibitory concentrations (MICs), ranging from 1 to 2 μM against four drug-susceptible bacteria and ten drug-resistant bacteria. Moreover, the hemolysis and cytotoxicity was reduced significantly compared to those of the parent peptides, highlighting its high cell selectivity. The morphological changes in the giant unilamellar vesicles and bacterial cell surfaces caused by the Hn-Mc peptide suggested that it killed the microbial cells by damaging the membrane envelope. An in vivo study also demonstrated the antibacterial activity of the Hn-Mc peptide in a mouse model infected with drug-resistant bacteria. In addition, the chimeric peptide inhibited the expression of lipopolysaccharide (LPS)-induced cytokines in RAW 264.7 cells by preventing the interaction between LPS and Toll-like receptors. These results suggest that this chimeric peptide is an antimicrobial and anti-inflammatory candidate as a pharmaceutic agent.
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Affiliation(s)
- Young-Min Kim
- Department of Polymer Science and Engineering, College of Engineering, Sunchon National University, Suncheon, Jeonnam 540-950, South Korea
| | - Nam-Hong Kim
- Department of Polymer Science and Engineering, College of Engineering, Sunchon National University, Suncheon, Jeonnam 540-950, South Korea
| | - Jong-Wan Lee
- Department of Polymer Science and Engineering, College of Engineering, Sunchon National University, Suncheon, Jeonnam 540-950, South Korea
| | - Jin-Sun Jang
- Department of Polymer Science and Engineering, College of Engineering, Sunchon National University, Suncheon, Jeonnam 540-950, South Korea
| | - Yung-Hoon Park
- Department of Polymer Science and Engineering, College of Engineering, Sunchon National University, Suncheon, Jeonnam 540-950, South Korea
| | - Seong-Cheol Park
- Department of Polymer Science and Engineering, College of Engineering, Sunchon National University, Suncheon, Jeonnam 540-950, South Korea.
| | - Mi-Kyeong Jang
- Department of Polymer Science and Engineering, College of Engineering, Sunchon National University, Suncheon, Jeonnam 540-950, South Korea.
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148
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Li Y, Wu H, Teng P, Bai G, Lin X, Zuo X, Cao C, Cai J. Helical Antimicrobial Sulfono-γ-AApeptides. J Med Chem 2015; 58:4802-11. [PMID: 26020456 DOI: 10.1021/acs.jmedchem.5b00537] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Host-defense peptides (HDPs) such as magainin 2 have emerged as potential therapeutic agents combating antibiotic resistance. Inspired by their structures and mechanism of action, herein we report the first example of antimicrobial helical sulfono-γ-AApeptide foldamers. The lead molecule displays broad-spectrum and potent antimicrobial activity against multi-drug-resistant Gram-positive and Gram-negative bacterial pathogens. Time-kill studies and fluorescence microscopy suggest that sulfono-γ-AApeptides eradicate bacteria by taking a mode of action analogous to that of HDPs. Clear structure-function relationships exist in the studied sequences. Longer sequences, presumably adopting more-defined helical structures, are more potent than shorter ones. Interestingly, the sequence with less helical propensity in solution could be more selective than the stronger helix-forming sequences. Moreover, this class of antimicrobial agents are resistant to proteolytic degradation. These results may lead to the development of a new class of antimicrobial foldamers combating emerging antibiotic-resistant pathogens.
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Affiliation(s)
| | | | | | | | | | - Xiaobing Zuo
- §X-ray Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
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149
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Monteiro C, Fernandes M, Pinheiro M, Maia S, Seabra CL, Ferreira-da-Silva F, Costa F, Reis S, Gomes P, Martins MCL. Antimicrobial properties of membrane-active dodecapeptides derived from MSI-78. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2015; 1848:1139-46. [DOI: 10.1016/j.bbamem.2015.02.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Revised: 12/14/2014] [Accepted: 02/03/2015] [Indexed: 11/29/2022]
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150
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Bera S, Ghosh A, Sharma S, Debnath T, Giri B, Bhunia A. Probing the role of Proline in the antimicrobial activity and lipopolysaccharide binding of indolicidin. J Colloid Interface Sci 2015; 452:148-159. [PMID: 25935286 DOI: 10.1016/j.jcis.2015.04.031] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 04/12/2015] [Accepted: 04/13/2015] [Indexed: 01/28/2023]
Abstract
HYPOTHESIS Indolicidin (ILPWKWPWWPWRR-NH2), an antimicrobial peptide from bovine neutrophils, possesses significant antibacterial activity. An interesting feature of indolicidin is its unusually high content of Tryptophan and Proline residues. While the involvement of Tryptophan has been studied for its hemolytic and antibacterial activity, little is known about the roles played by Proline in these aspects. We herein investigate the structure and biological activities of indolicidin, where Proline at either one or more of the 3rd, 7th, 10th positions has been replaced by Alanine to better understand its structure and biological function. EXPERIMENTS Structural aspects of Proline residues of indolicidin and its effect on antimicrobial activity were elucidated by replacing Proline residues with Alanine. Minimum inhibitory concentration (MIC) and scanning electron microscopy (SEM) experiments provide substantial evidence for the importance of Proline residues for antimicrobial activity and cell wall disintegration. Binding affinity of the peptides to Lipopolysaccharide (LPS) was investigated using fluorescence spectroscopy and dynamic light scattering (DLS) in conjunction with (31)PNMR spectroscopy and confirmed the disintegration of LPS layer. FINDINGS Our study reveals that Proline residues are necessary for interaction of indolicidin with LPS and establishes the significance of the third and tenth Proline residues for its antimicrobial activity. We believe that the presence of so many Proline residues provides the molecule a selective advantage of adopting different conformations varying from a globular, closed conformation to an open extended conformation, and even to a wedge-shaped conformation, which account for the diverse mechanisms of action of indolicidin.
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Affiliation(s)
- Swapna Bera
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700054, India
| | - Anirban Ghosh
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700054, India
| | - Shruti Sharma
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700054, India
| | - Tanmoy Debnath
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700054, India
| | - Banabihari Giri
- Central Instrument Facility, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700054, India
| | - Anirban Bhunia
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme VII (M), Kolkata 700054, India.
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