151
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He SW, Wang JJ, Du X, Yue B, Wang GH, Zhou S, Xie B, Zhang M. A teleost TFPI-2 peptide that possesses a broad antibacterial spectrum and immune-stimulatory properties. FISH & SHELLFISH IMMUNOLOGY 2018; 82:469-475. [PMID: 30149134 DOI: 10.1016/j.fsi.2018.08.051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 08/16/2018] [Accepted: 08/23/2018] [Indexed: 05/06/2023]
Abstract
Tissue factor pathway inhibitor 2 (TFPI-2) is an analogue of TFPI-1 and a potent endogenous inhibitor of tissue factor (TF)-mediated blood coagulation. Previous reports have shown that several peptides derived from human and vertebrates TFPI-2 possess antibacterial activity against diverse bacteria. In this study, a C-terminal peptide, TO24 (with 24 amino acids), derived from red drum (Sciaenops ocellatus) TFPI-2, was synthesized and investigated for its antimicrobial spectrum, action mode, as well as the immune-stimulatory property. Our results indicated that TO24 was active against Gram-positive bacteria Micrococcus luteus and Staphylococcus aureus; Gram-negative bacteria Vibrio litoralis, Vibrio ichthyoenteri, Vibrio vulnificus and Vibrio scophthalmi, as well as fish megalocytivirus, infectious spleen and kidney necrosis virus (ISKNV). During its interaction with V. vulnificus, TO24 exerted its antibacterial activity by destroying cell membrane integrity, penetrating the cytoplasm and inducing degradation of genomic DNA and total RNA. In addition, TO24 had no hemolytic activity against red drum blood cells. In vitro, TO24 enhanced bactericidal activity of red drum macrophages. In vivo, administration of red drum with TO24 before bacterial infection significantly reduced pathogen dissemination and replication in tissues. These results indicate that TO24 is a broad-spectrum antimicrobial peptide with immune-stimulatory properties and it has the potential to be used as an antimicrobial agent in aquaculture.
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Affiliation(s)
- Shu-Wen He
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Jing-Jing Wang
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Xue Du
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Bin Yue
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Guang-Hua Wang
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Shun Zhou
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Bing Xie
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Min Zhang
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China.
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152
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Dubovskii PV, Efremov RG. The role of hydrophobic /hydrophilic balance in the activity of structurally flexible vs. rigid cytolytic polypeptides and analogs developed on their basis. Expert Rev Proteomics 2018; 15:873-886. [PMID: 30328726 DOI: 10.1080/14789450.2018.1537786] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Being important representatives of various proteomes, membrane-active cationic peptides (CPs) are attractive objects as lead compounds in the design of new antibacterial, anticancer, antifungal, and antiviral molecules. Numerous CPs are found in insect and snake venoms, where many of them reveal cytolytic properties. Due to advances in omics technologies, the number of such peptides is growing dramatically. Areas covered: To understand structure-function relationships for CPs in a living cell, detailed analysis of their hydrophobic/hydrophilic properties is indispensable. We consider two structural classes of membrane-active CPs: latarcins (Ltc) from spider and cardiotoxins (CTXs) from snake venoms. While the former are void off disulfide bonds and conformationally flexible, the latter are structurally rigid and cross-linked with disulfide bonds. In order to elucidate structure-activity relationships behind their antibacterial, anticancer, and hemolytic effects, the properties of these polypeptides are considered on a side-by-side basis. Expert commentary: An ever-increasing number of venom-derived membrane-active polypeptides require new methods for identification of their functional propensities and sequence-based design of novel pharmacological substances. We address these issues considering a number of the designed peptides, based either on Ltc or CTX sequences. Experimental and computer modeling techniques required for these purposes are delineated.
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Affiliation(s)
- Peter V Dubovskii
- a Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry , Russian Academy of Sciences , Moscow , Russia
| | - Roman G Efremov
- a Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry , Russian Academy of Sciences , Moscow , Russia.,b Moscow Institute of Physics and Technology , Dolgoprudnyi , Russian Federation.,c National Research University Higher School of Economics , Moscow , Russia
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153
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Wang X, Wang Y, Wang K, Ren Q, Li H, Zheng S, Niu Y, Zhou X, Li W, Zhang L. Bifunctional anticaries peptides with antibacterial and remineralizing effects. Oral Dis 2018; 25:488-496. [PMID: 30291730 DOI: 10.1111/odi.12990] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 09/17/2018] [Accepted: 09/28/2018] [Indexed: 02/05/2023]
Affiliation(s)
- Xiuqing Wang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics; West China Hospital of Stomatology, Sichuan University; Chengdu China
- Department of Endodontics and Operative Dentistry, School and Hospital of Stomatology; Fujian Medical University; Fuzhou China
| | - Yufei Wang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics; West China Hospital of Stomatology, Sichuan University; Chengdu China
| | - Kun Wang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics; West China Hospital of Stomatology, Sichuan University; Chengdu China
| | - Qian Ren
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics; West China Hospital of Stomatology, Sichuan University; Chengdu China
| | - Haoran Li
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics; West China Hospital of Stomatology, Sichuan University; Chengdu China
| | - Sainan Zheng
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics; West China Hospital of Stomatology, Sichuan University; Chengdu China
| | - Yumei Niu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics; West China Hospital of Stomatology, Sichuan University; Chengdu China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics; West China Hospital of Stomatology, Sichuan University; Chengdu China
| | - Wei Li
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics; West China Hospital of Stomatology, Sichuan University; Chengdu China
| | - Linglin Zhang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics; West China Hospital of Stomatology, Sichuan University; Chengdu China
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154
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Pacor S, Guida F, Xhindoli D, Benincasa M, Gennaro R, Tossi A. Effect of targeted minimal sequence variations on the structure and biological activities of the human cathelicidin LL‐37. Pept Sci (Hoboken) 2018. [DOI: 10.1002/pep2.24087] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Sabrina Pacor
- Department of Life SciencesUniversity of Trieste, Building Q, Via Giorgieri 5 Trieste 34127 Italy
| | - Filomena Guida
- Department of Life SciencesUniversity of Trieste, Building Q, Via Giorgieri 5 Trieste 34127 Italy
| | - Daniela Xhindoli
- Department of Life SciencesUniversity of Trieste, Building Q, Via Giorgieri 5 Trieste 34127 Italy
| | - Monica Benincasa
- Department of Life SciencesUniversity of Trieste, Building Q, Via Giorgieri 5 Trieste 34127 Italy
| | - Renato Gennaro
- Department of Life SciencesUniversity of Trieste, Building Q, Via Giorgieri 5 Trieste 34127 Italy
| | - Alessandro Tossi
- Department of Life SciencesUniversity of Trieste, Building Q, Via Giorgieri 5 Trieste 34127 Italy
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155
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Yang CH, Chen YC, Peng SY, Tsai APY, Lee TJF, Yen JH, Liou JW. An engineered arginine-rich α-helical antimicrobial peptide exhibits broad-spectrum bactericidal activity against pathogenic bacteria and reduces bacterial infections in mice. Sci Rep 2018; 8:14602. [PMID: 30279591 PMCID: PMC6168480 DOI: 10.1038/s41598-018-32981-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 09/20/2018] [Indexed: 12/05/2022] Open
Abstract
The increase in the prevalence of antibiotic-resistant bacteria has become a major public health concern. Antimicrobial peptides (AMPs) are emerging as promising candidates addressing this issue. In this study, we designed several AMPs by increasing α-helical contents and positive charges and optimizing hydrophobicity and amphipathicity in the Sushi 1 peptide from horseshoe crabs. A neural network–based bioinformatic prediction tool was used for the first stage evaluations of peptide properties. Among the peptides designed, Sushi-replacement peptide (SRP)-2, an arginine-rich and highly α-helical peptide, showed broad-spectrum bactericidal activity against both Gram-positive and Gram-negative bacteria, including methicillin-resistant Staphylococcus aureus and multidrug-resistant Acinetobacter baumannii; nevertheless, it showed little hemolytic and cytotoxic activity against mammalian cells. Atomic force microscopy results indicated that SRP-2 should interact directly with cell membrane components, resulting in bacterial cell death. SRP-2 also neutralized LPS-induced macrophage activation. Moreover, in an intraperitoneal multidrug-resistant A. baumannii infection mouse model, SRP-2 successfully reduced the bacterial number in ascitic fluid and tumor necrosis factor-α production. Our study findings demonstrate that bioinformatic calculations can be powerful tools to help design potent AMPs and that arginine is superior to lysine for providing positive charges for AMPs to exhibit better bactericidal activity and selectivity against bacterial cells.
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Affiliation(s)
- Chin-Hao Yang
- Institute of Medical Sciences, Tzu Chi University, Hualien, Taiwan
| | - Yi-Cheng Chen
- Department of Medicine, Mackay Medical College, New Taipei, Taiwan
| | - Shih-Yi Peng
- Department of Biochemistry, School of Medicine, Tzu Chi University, Hualien, Taiwan
| | - Andy Po-Yi Tsai
- Ph.D. Program in Translational Medicine, Tzu Chi University/Academia Sinica, Taipei, Taiwan
| | - Tony Jer-Fu Lee
- Department of Medical Research, Buddhist Tzu Chi General Hospital, Hualien, Taiwan.,Department of Pharmacology, Southern Illinois University School of Medicine, Springfield, IL, USA
| | - Jui-Hung Yen
- Department of Molecular Biology and Human Genetics, Tzu Chi University, Hualien, Taiwan
| | - Je-Wen Liou
- Institute of Medical Sciences, Tzu Chi University, Hualien, Taiwan. .,Department of Biochemistry, School of Medicine, Tzu Chi University, Hualien, Taiwan.
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156
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Dicks LMT, Dreyer L, Smith C, van Staden AD. A Review: The Fate of Bacteriocins in the Human Gastro-Intestinal Tract: Do They Cross the Gut-Blood Barrier? Front Microbiol 2018; 9:2297. [PMID: 30323796 PMCID: PMC6173059 DOI: 10.3389/fmicb.2018.02297] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 09/07/2018] [Indexed: 12/20/2022] Open
Abstract
The intestinal barrier, consisting of the vascular endothelium, epithelial cell lining, and mucus layer, covers a surface of about 400 m2. The integrity of the gut wall is sustained by transcellular proteins forming tight junctions between the epithelial cells. Protected by three layers of mucin, the gut wall forms a non-permeable barrier, keeping digestive enzymes and microorganisms within the luminal space, separate from the blood stream. Microorganisms colonizing the gut may produce bacteriocins in an attempt to outcompete pathogens. Production of bacteriocins in a harsh and complex environment such as the gastro-intestinal tract (GIT) may be below minimal inhibitory concentration (MIC) levels. At such low levels, the stability of bacteriocins may be compromised. Despite this, most bacteria in the gut have the ability to produce bacteriocins, distributed throughout the GIT. With most antimicrobial studies being performed in vitro, we know little about the migration of bacteriocins across epithelial barriers. The behavior of bacteriocins in the GIT is studied ex vivo, using models, flow cells, or membranes resembling the gut wall. Furthermore, little is known about the effect bacteriocins have on the immune system. It is generally believed that the peptides will be destroyed by macrophages once they cross the gut wall. Studies done on the survival of neurotherapeutic peptides and their crossing of the brain-blood barrier, along with other studies on small peptides intravenously injected, may provide some answers. In this review, the stability of bacteriocins in the GIT, their effect on gut epithelial cells, and their ability to cross epithelial cells are discussed. These are important questions to address in the light of recent papers advocating the use of bacteriocins as possible alternatives to, or used in combination with, antibiotics.
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Affiliation(s)
- Leon M. T. Dicks
- Department of Microbiology, Stellenbosch University, Stellenbosch, South Africa
| | - Leané Dreyer
- Department of Microbiology, Stellenbosch University, Stellenbosch, South Africa
| | - Carine Smith
- Department of Physiological Sciences, Stellenbosch University, Stellenbosch, South Africa
| | - Anton D. van Staden
- Department of Microbiology, Stellenbosch University, Stellenbosch, South Africa
- Department of Physiological Sciences, Stellenbosch University, Stellenbosch, South Africa
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157
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Antimicrobial peptides from C-terminal amphipathic region of E. coli FtsA. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2018; 1860:2506-2514. [PMID: 30279152 DOI: 10.1016/j.bbamem.2018.09.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Revised: 09/08/2018] [Accepted: 09/14/2018] [Indexed: 11/22/2022]
Abstract
Antimicrobial peptides constitute an indispensable component of innate immune system in organisms ranging from bacteria to man. Despite this, peptides lag far behind the conventional antibiotics in treating infections. The menace of multidrug-resistant bacteria, however, has revived the antimicrobial peptide research. We reasoned that the membrane-binding regions of bacterial proteins could be purposed to combat them. Here, we identify potent antimicrobial peptides from the C-terminal amphipathic helix of E. coli FtsA protein. The 11 and 13-residue peptides exhibited activity against E. coli, gentamicin-resistant MRSA, and C. albicans. The activity is little affected by the presence of salt and divalent cations. The peptides preferentially bind to the negatively-charged membranes as indicated by tryptophan fluorescence studies. The peptides permeabilize the E. coli outer and inner membranes at very promising concentrations suggesting membrane-disruption as one of the mechanisms of killing.
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158
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Inui Kishi RN, Stach-Machado D, Singulani JDL, dos Santos CT, Fusco-Almeida AM, Cilli EM, Freitas-Astúa J, Picchi SC, Machado MA. Evaluation of cytotoxicity features of antimicrobial peptides with potential to control bacterial diseases of citrus. PLoS One 2018; 13:e0203451. [PMID: 30192822 PMCID: PMC6128562 DOI: 10.1371/journal.pone.0203451] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 08/21/2018] [Indexed: 01/31/2023] Open
Abstract
Antimicrobial peptides (AMPs) can be found in various organisms, and could be considered an alternative for pesticides used to control plant pathogens, including those affecting citrus. Brazil is the largest producer and exporter of frozen concentrated orange juice in the world. However, the citrus industry has been affected by several diseases such as citrus canker and huanglongbing (HLB), caused by the bacteria Xanthomonas citri subsp. citri (X.citri) and Candidatus Liberibacter asiaticus (CaLas), respectively. In order to control these pathogens, putative AMPs were prospected in databases containing citrus sequences. Furthermore, AMPs already reported in the literature were also used for in vitro and in vivo assays against X.citri. Since CaLas cannot be cultivated in vitro, surrogates as Sinorhizobium meliloti and Agrobacterium tumefaciens were used. This study reports the evaluation of six AMPs obtained from different sources, two of them from Citrus spp. (citrus-amp1 and citrus-amp2), three from amphibians (Hylin-a1, K0-W6-Hy-a1 and Ocellatin 4-analogue) and one from porcine (Tritrpticin). Peptides K0-W6-Hy-a1, Ocellatin 4-analogue, and citrus-amp1 showed bactericidal activity against X.citri and S. meliloti and bacteriostatic effect on A. tumefaciens. These results were confirmed for X.citri in planta. In addition cytotoxicity evaluations of these molecules were performed. The AMPs that showed the lowest hemolytic activities were Triptrpticin, citrus-amp1 and citrus-amp2. Citrus-amp1 and citrus-amp2 not presented toxicity in experiments using in vivo model, G. mellonella and U87 MG cells. To verify the interaction of these AMPs with bacteria and erythrocyte cell membranes, vesicles mimicking these cells were built. Citrus-amp1 and Tritrpticin exhibited higher affinity to bacterial membranes, while Ocellatin 4-analogue and Hylin-a1 showed higher affinity to erythrocyte membranes; exclude their use in citrus. This work demonstrates an essential alternative, trough AMPs obtained from Citrus spp., which can be feasibly used to control bacterial pathogens.
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Affiliation(s)
- Rosangela Naomi Inui Kishi
- Centro de Citricultura Sylvio Moreira, Instituto Agronômico, Cordeirópolis, São Paulo, Brazil
- Instituto de Biologia, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
- * E-mail:
| | - Dagmar Stach-Machado
- Instituto de Biologia, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
| | - Junya de Lacorte Singulani
- Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista Julio de Mesquita Filho, Araraquara, São Paulo, Brazil
| | - Claudia Tavares dos Santos
- Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista Julio de Mesquita Filho, Araraquara, São Paulo, Brazil
| | - Ana Marisa Fusco-Almeida
- Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista Julio de Mesquita Filho, Araraquara, São Paulo, Brazil
| | - Eduardo Maffud Cilli
- Instituto de Química de Araraquara, Departamento de Bioquímica e tecnologia química, Universidade Estadual Paulista Julio de Mesquita Filho, Araraquara, São Paulo, Brazil
| | | | - Simone Cristina Picchi
- Centro de Citricultura Sylvio Moreira, Instituto Agronômico, Cordeirópolis, São Paulo, Brazil
| | - Marcos Antonio Machado
- Centro de Citricultura Sylvio Moreira, Instituto Agronômico, Cordeirópolis, São Paulo, Brazil
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159
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Shirley DJ, Chrom CL, Richards EA, Carone BR, Caputo GA. Antimicrobial activity of a porphyrin binding peptide. Pept Sci (Hoboken) 2018; 110. [PMID: 30637367 DOI: 10.1002/pep2.24074] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Amphiphilic alpha-helices are common motifs used in numerous biological systems including membrane channels/pores and antimicrobial peptides (AMPs), and binding proteins, and a variety of synthetic biomaterials. Previously, an amphiphilic peptide with lysine-containing motifs was shown to reversibly bind the anionic porphyrin meso-Tetra(4-sulfonatophenyl)porphyrin (TPPS4 2-) and promote the formation of excitonically coupled conductive J-aggregates. The work presented here focuses on the use of this amphiphilic peptide and derivatives as a potential antimicrobial agent. AMPs are naturally occurring components of the innate immune system, which selectively target and kill bacteria. Sequence derivatives were synthesized in which the position of the Trp, used as a fluorescence reporter, was changed. Additional variants were synthesized where the hydrophobic amino acids were replaced with Ala to reduce net hydrophobicity or where the cationic Lys residues were replaced with diaminopropionic acid (Dap). All peptide sequences retained the ability to bind TPPS4 2- and promote the formation of J-aggregates. The peptides all exhibited a preference for binding anionic lipid vesicles compared to zwitterionic bilayers. The Trp position did not impact antimicrobial activity, but the substituted peptides exhibited markedly lower efficacy. The Dap-containing peptide was only active against E. coli and P. aeruginosa, while the Ala-substituted peptide was inactive at the concentrations tested. This trend was also evident in bacterial membrane permeabilization. The results indicate that the amphiphilic porphyrin binding peptides can also be used as antimicrobial peptides. The cationic nature is a driver in binding to lipid bilayers, but the overall hydrophobicity is important for antimicrobial activity and membrane disruption.
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Affiliation(s)
- David J Shirley
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road Glassboro, NJ 08028
| | - Christina L Chrom
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road Glassboro, NJ 08028
| | - Elizabeth A Richards
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road Glassboro, NJ 08028.,Bantivoglio Honors College, Rowan University, 201 Mullica Hill Road Glassboro, NJ 08028
| | - Benjamin R Carone
- Department of Molecular and Cellular Biosciences, Rowan University, 201 Mullica Hill Road Glassboro, NJ 08028
| | - Gregory A Caputo
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road Glassboro, NJ 08028.,Department of Molecular and Cellular Biosciences, Rowan University, 201 Mullica Hill Road Glassboro, NJ 08028
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160
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Design of antimicrobial peptides from a cuttlefish database. Amino Acids 2018; 50:1573-1582. [PMID: 30121851 DOI: 10.1007/s00726-018-2633-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 08/03/2018] [Indexed: 01/15/2023]
Abstract
No antimicrobial peptide has been identified in cephalopods to date. Annotation of transcriptomes or genomes using basic local alignment Search Tool failed to yield any from sequence identities. Therefore, we searched for antimicrobial sequences in the cuttlefish (Sepia officinalis) database by in silico analysis of a transcriptomic database. Using an original approach based on the analysis of cysteine-free antimicrobial peptides selected from our Antimicrobial Peptide Database (APD3), the online prediction tool of the Collection of Anti-Microbial Peptides (CAMPR3), and a homemade software program, we identified potential antibacterial sequences. Nine peptides less than 25 amino acids long were synthesized. The hydrophobic content of all nine of them ranged from 30 to 70%, and they could form alpha-helices. Three peptides possessed similarities with piscidins, one with BMAP-27, and five were totally new. Their antibacterial activity was evaluated on eight bacteria including the aquatic pathogens Vibrio alginolyticus, Aeromonas salmonicida, or human pathogens such as Salmonella typhimurium, Listeria monocytogenes, or Staphylococcus aureus. Despite the prediction of an antimicrobial potential for eight of the peptides, only two-GR21 and KT19-inhibited more than one bacterial strain with minimal inhibitory concentrations below 25 µM. Some sequences like VA20 and FK19 were hemolytic, while GR21 induced less than 10% of hemolysis on human blood cells at a concentration of 200 µM. GR21 was the only peptide derived from a precursor with a signal peptide, suggesting a real role in cuttlefish immune defense.
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161
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Wang Q, Guo P, Wang Z, Liu H, Zhang Y, Jiang S, Han W, Xia Q, Zhao P. Antibacterial Mechanism of Gloverin2 from Silkworm, Bombyx mori. Int J Mol Sci 2018; 19:ijms19082275. [PMID: 30081443 PMCID: PMC6121877 DOI: 10.3390/ijms19082275] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 07/25/2018] [Accepted: 07/28/2018] [Indexed: 01/21/2023] Open
Abstract
Gloverin is one of the glycine-rich antimicrobial peptide exclusively found in Lepidoptera insects. It is generally activated through the innate immune system in insects. In this study, recombinant Gloverin2 from Bombyx mori (BmGlv2) was synthesized using a prokaryotic expression system. Circular dichroism spectroscopy showed that the recombinant BmGlv2 has random coil structure, which is relatively stable at the temperatures ranging from 15 to 82.5 °C. Antimicrobial activity analysis revealed that BmGlv2 significantly inhibited the growth of gram-negative bacteria, Escherichia coli JM109 and Pseudomonas putida, by disrupting cell integrity. Western blotting and immunofluorescence analyses suggested that BmGlv2 absorbed on the cell surface after incubation, which might be the first step in the antibacterial process. Our results also proved that the cell wall component lipopolysaccharides (LPS) induce a conformational change in BmGlv2 from a random coil to α-helix. Subsequently, α-helical BmGlv2 would recruit more BmGlv2 and form higher aggregation state. Collectively, these findings expand our understanding of antibacterial mechanism of BmGlv2.
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Affiliation(s)
- Qian Wang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China.
| | - Pengchao Guo
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China.
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing 400715, China.
| | - Zhan Wang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China.
| | - Huawei Liu
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China.
| | - Yunshi Zhang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China.
| | - Shan Jiang
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China.
| | - Wenzhe Han
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China.
| | - Qingyou Xia
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China.
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing 400715, China.
| | - Ping Zhao
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing 400715, China.
- Chongqing Engineering and Technology Research Center for Novel Silk Materials, Chongqing 400715, China.
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162
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Pandit G, Ilyas H, Ghosh S, Bidkar AP, Mohid SA, Bhunia A, Satpati P, Chatterjee S. Insights into the Mechanism of Antimicrobial Activity of Seven-Residue Peptides. J Med Chem 2018; 61:7614-7629. [DOI: 10.1021/acs.jmedchem.8b00353] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Gopal Pandit
- Department of Chemistry, Indian Institute of Technology, Guwahati 781039, India
| | - Humaira Ilyas
- Department of Biophysics, Bose Institute, P-1/12 CIT Scheme, VII (M), Kolkata 700054, India
| | - Suvankar Ghosh
- Department of Biosciences and Bioengineering, IIT, Guwahati 781039, India
| | - Anil P. Bidkar
- Department of Biosciences and Bioengineering, IIT, Guwahati 781039, India
| | - Sk. Abdul Mohid
- Department of Biophysics, 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
| | | | - Sunanda Chatterjee
- Department of Chemistry, Indian Institute of Technology, Guwahati 781039, India
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163
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Balatti GE, Martini MF, Pickholz M. A coarse-grained approach to studying the interactions of the antimicrobial peptides aurein 1.2 and maculatin 1.1 with POPG/POPE lipid mixtures. J Mol Model 2018; 24:208. [PMID: 30019106 DOI: 10.1007/s00894-018-3747-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 06/27/2018] [Indexed: 01/08/2023]
Abstract
In the present work we investigated the differential interactions of the antimicrobial peptides (AMPs) aurein 1.2 and maculatin 1.1 with a bilayer composed of a mixture of the lipids 1-palmitoyl-2-oleoyl-sn-glycero-3-phospho-(1'-rac-glycerol) (POPG) and 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoethanolamine (POPE). We carried out molecular dynamics (MD) simulations using a coarse-grained approach within the MARTINI force field. The POPE/POPG mixture was used as a simple model of a bacterial (prokaryotic cell) membrane. The results were compared with our previous findings for structures of 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC), a representative lipid of mammalian cells. We started the simulations of the peptide-lipid system from two different initial conditions: peptides in water and peptides inside the hydrophobic core of the membrane, employing a pre-assembled lipid bilayer in both cases. Our results show similarities and differences regarding the molecular behavior of the peptides in POPE/POPG in comparison to their behavior in a POPC membrane. For instance, aurein 1.2 molecules can adopt similar pore-like structures on both POPG/POPE and POPC membranes, but the peptides are found deeper in the hydrophobic core in the former. Maculatin 1.1 molecules, in turn, achieve very similar structures in both kinds of bilayers: they have a strong tendency to form clusters and induce curvature. Therefore, the results of this study provide insight into the mechanisms of action of these two peptides in membrane leakage, which allows organisms to protect themselves against potentially harmful bacteria. Graphical Abstract Aurein pore structure (green) in a lipid bilayer composed by POPE (blue) and POPG (red) mixture. It is possible to see water beads (light blue) inside the pore.
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Affiliation(s)
- G E Balatti
- Facultad de Ciencias Exactas y Naturales, Departamento de Física, Universidad de Buenos Aires, Buenos Aires, Argentina.,CONICET-Universidad de Buenos Aires, IFIBA, C1428BFA, Buenos Aires, Argentina
| | - M F Martini
- Facultad de Farmacia y Bioquímica, Departamento de Farmacología, Universidad de Buenos Aires, Buenos Aires, Argentina.,CONICET-Universidad de Buenos Aires, IQUIMEFA, C1113AA, Buenos Aires, Argentina
| | - M Pickholz
- Facultad de Ciencias Exactas y Naturales, Departamento de Física, Universidad de Buenos Aires, Buenos Aires, Argentina. .,CONICET-Universidad de Buenos Aires, IFIBA, C1428BFA, Buenos Aires, Argentina.
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164
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Chen HL, Su PY, Kuo SC, Lauderdale TLY, Shih C. Adding a C-terminal Cysteine (CTC) Can Enhance the Bactericidal Activity of Three Different Antimicrobial Peptides. Front Microbiol 2018; 9:1440. [PMID: 30002652 PMCID: PMC6031733 DOI: 10.3389/fmicb.2018.01440] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 06/11/2018] [Indexed: 12/15/2022] Open
Abstract
The emergence of antibiotic-resistant bacteria has threatened our health worldwide. There is an urgent need for novel antibiotics. Previously, we identified a novel 37-mer antimicrobial peptide (AMP), HBcARD, with broad spectrum antimicrobial activity. Here, we improved the efficacy of HBcARD, by re-engineering the peptide, including the addition of a new cysteine to its C-terminus (CTC). The new 28-mer derivative, D-150-177C, contains all D-form arginines, in addition to a C-terminal cycteine. This peptide can kill antibiotic-resistant clinical isolates of Gram-negative bacteria, and is more potent than the parental HBcARD peptide in a mouse sepsis model. In another lung infection mouse model, D-150-177C showed protection efficacy against colistin-resistant Acinetobacter baumannii. Unlike colistin, we observed no acute toxicity of D-150-177C in vivo. Interestingly, we found that CTC modification could enhance the antibacterial activity of several other AMPs, such as buforinII and lysin. The potential application and mechanism of this CTC method as a general approach to improving drug efficacy, warrants further investigation in the future.
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Affiliation(s)
- Heng-Li Chen
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Pei-Yi Su
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Shu-Chen Kuo
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Taiwan
| | - Tsai-Ling Y Lauderdale
- National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Taiwan
| | - Chiaho Shih
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
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165
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Synthetic antimicrobial peptides delocalize membrane bound proteins thereby inducing a cell envelope stress response. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2018; 1860:2416-2427. [PMID: 29894683 DOI: 10.1016/j.bbamem.2018.06.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 05/24/2018] [Accepted: 06/06/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND Three amphipathic cationic antimicrobial peptides (AMPs) were characterized by determining their effect on Gram-positive bacteria using Bacillus subtilis strain 168 as a model organism. These peptides were TC19 and TC84, derivatives of thrombocidin-1 (TC-1), the major AMPs of human blood platelets, and Bactericidal Peptide 2 (BP2), a synthetic designer peptide based on human bactericidal permeability increasing protein (BPI). METHODS To elucidate the possible mode of action of the AMPs we performed a transcriptomic analysis using microarrays. Physiological analyses were performed using transmission electron microscopy (TEM), fluorescence microscopy and various B. subtilis mutants that produce essential membrane bound proteins fused to green fluorescent protein (GFP). RESULTS The transcriptome analysis showed that the AMPs induced a cell envelope stress response (cell membrane and cell wall). The cell membrane stress response was confirmed with the physiological observations that TC19, TC84 and BP2 perturb the membrane of B. subtilis. Using B. subtilis mutants, we established that the cell wall stress response is due to the delocalization of essential membrane bound proteins involved in cell wall synthesis. Other essential membrane proteins, involved in cell membrane synthesis and metabolism, were also delocalized due to alterations caused by the AMPs. CONCLUSIONS We showed that peptides TC19, TC84 and BP2 perturb the membrane causing essential proteins to delocalize, thus preventing the possible repair of the cell envelope after the initial interference with the membrane. GENERAL SIGNIFICANCE These AMPs show potential for eventual clinical application against Gram-positive bacterial cells and merit further application-oriented investigation.
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166
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Hollmann A, Martinez M, Maturana P, Semorile LC, Maffia PC. Antimicrobial Peptides: Interaction With Model and Biological Membranes and Synergism With Chemical Antibiotics. Front Chem 2018; 6:204. [PMID: 29922648 PMCID: PMC5996110 DOI: 10.3389/fchem.2018.00204] [Citation(s) in RCA: 193] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 05/17/2018] [Indexed: 01/10/2023] Open
Abstract
Antimicrobial peptides (AMPs) are promising novel antibiotics since they have shown antimicrobial activity against a wide range of bacterial species, including multiresistant bacteria; however, toxicity is the major barrier to convert antimicrobial peptides into active drugs. A profound and proper understanding of the complex interactions between these peptides and biological membranes using biophysical tools and model membranes seems to be a key factor in the race to develop a suitable antimicrobial peptide therapy for clinical use. In the search for such therapy, different combined approaches with conventional antibiotics have been evaluated in recent years and demonstrated to improve the therapeutic potential of AMPs. Some of these approaches have revealed promising additive or synergistic activity between AMPs and chemical antibiotics. This review will give an insight into the possibilities that physicochemical tools can give in the AMPs research and also address the state of the art on the current promising combined therapies between AMPs and conventional antibiotics, which appear to be a plausible future opportunity for AMPs treatment.
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Affiliation(s)
- Axel Hollmann
- Laboratory of Molecular Microbiology, Institute of Basic and Applied Microbiology, National University of Quilmes, Bernal, Argentina.,Centro de Investigación en Biofísica Aplicada y Alimentos, Consejo Nacional de Investigaciones Científicas y Técnicas and National University of Santiago del Estero, Santiago del Estero, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Melina Martinez
- Laboratory of Molecular Microbiology, Institute of Basic and Applied Microbiology, National University of Quilmes, Bernal, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Patricia Maturana
- Centro de Investigación en Biofísica Aplicada y Alimentos, Consejo Nacional de Investigaciones Científicas y Técnicas and National University of Santiago del Estero, Santiago del Estero, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
| | - Liliana C Semorile
- Laboratory of Molecular Microbiology, Institute of Basic and Applied Microbiology, National University of Quilmes, Bernal, Argentina
| | - Paulo C Maffia
- Laboratory of Molecular Microbiology, Institute of Basic and Applied Microbiology, National University of Quilmes, Bernal, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
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167
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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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168
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Biswaro LS, da Costa Sousa MG, Rezende TMB, Dias SC, Franco OL. Antimicrobial Peptides and Nanotechnology, Recent Advances and Challenges. Front Microbiol 2018; 9:855. [PMID: 29867793 PMCID: PMC5953333 DOI: 10.3389/fmicb.2018.00855] [Citation(s) in RCA: 127] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 04/13/2018] [Indexed: 12/18/2022] Open
Abstract
Antimicrobial peptides are sequences of amino acids, which present activity against microorganisms. These peptides were discovered over 70 years ago, and are abundant in nature from soil bacteria, insects, amphibians to mammals and plants. They vary in amino acids number, the distance between amino acids within individual peptide structure, net charge, solubility and other physical chemical properties as well as differ in mechanism of action. These peptides may provide an alternative treatment to conventional antibiotics, which encounter resistance such as the peptide nisin applied in treating methicillin resistant Staphylococcus aureus (MRSA) or may behave synergistically with known antibiotics against parasites for instance, nisin Z when used in synergy with ampicillin reported better activity against Pseudomonas fluorescens than when the antibiotic was alone. AMPs are known to be active against viruses, bacteria, fungi and protozoans. Nanotechnology is an arena which explores the synthesis, characterization and application of an array of delivery systems at a one billionth of meter scale. Such systems are implemented to deliver drugs, proteins, vaccines, and peptides. The role of nanotechnology in delivering AMPs is still at its early development stage. There are challenges of incorporating AMPs into drug delivery system. This review intends to explore in depth, the role of nanotechnology in delivering AMPs as well as presenting the current advances and accompanying challenges of the technology.
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Affiliation(s)
- Lubhandwa S Biswaro
- Center of Proteomic and Biochemical Analysis, Genomic Sciences and Biotechnology Program, Catholic University of Brasília, Brasília, Brazil
| | - Mauricio G da Costa Sousa
- Center of Proteomic and Biochemical Analysis, Genomic Sciences and Biotechnology Program, Catholic University of Brasília, Brasília, Brazil
| | - Taia M B Rezende
- Center of Proteomic and Biochemical Analysis, Genomic Sciences and Biotechnology Program, Catholic University of Brasília, Brasília, Brazil.,Catholic University of Brasília, Brasília, Brazil.,Health Science Program, University of Brasília, Brasília, Brazil
| | - Simoni C Dias
- Center of Proteomic and Biochemical Analysis, Genomic Sciences and Biotechnology Program, Catholic University of Brasília, Brasília, Brazil
| | - Octavio L Franco
- Center of Proteomic and Biochemical Analysis, Genomic Sciences and Biotechnology Program, Catholic University of Brasília, Brasília, Brazil.,S-Inova Biotech, Biotechnology Program, Dom Bosco Catholic University, Campo Grande, Brazil
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169
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Vishnepolsky B, Gabrielian A, Rosenthal A, Hurt DE, Tartakovsky M, Managadze G, Grigolava M, Makhatadze GI, Pirtskhalava M. Predictive Model of Linear Antimicrobial Peptides Active against Gram-Negative Bacteria. J Chem Inf Model 2018; 58:1141-1151. [DOI: 10.1021/acs.jcim.8b00118] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Boris Vishnepolsky
- Ivane Beritashvili Center of Experimental Biomedicine, Tbilisi 0160, Georgia
| | - Andrei Gabrielian
- Office of Cyber Infrastructure and Computational Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Alex Rosenthal
- Office of Cyber Infrastructure and Computational Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Darrell E. Hurt
- Office of Cyber Infrastructure and Computational Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Michael Tartakovsky
- Office of Cyber Infrastructure and Computational Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Grigol Managadze
- Ivane Beritashvili Center of Experimental Biomedicine, Tbilisi 0160, Georgia
| | - Maya Grigolava
- Ivane Beritashvili Center of Experimental Biomedicine, Tbilisi 0160, Georgia
| | | | - Malak Pirtskhalava
- Ivane Beritashvili Center of Experimental Biomedicine, Tbilisi 0160, Georgia
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170
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Palmieri G, Balestrieri M, Capuano F, Proroga YTR, Pomilio F, Centorame P, Riccio A, Marrone R, Anastasio A. Bactericidal and antibiofilm activity of bactenecin-derivative peptides against the food-pathogen Listeria monocytogenes: New perspectives for food processing industry. Int J Food Microbiol 2018; 279:33-42. [PMID: 29727856 DOI: 10.1016/j.ijfoodmicro.2018.04.039] [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: 12/22/2017] [Revised: 04/23/2018] [Accepted: 04/24/2018] [Indexed: 10/17/2022]
Abstract
Antimicrobial peptides have received great attention for their potential benefits to extend the shelf-life of food-products. Innate defense regulator peptide-1018 (IDR-1018) represents a promising candidate for such applications, due to its broad-spectrum antimicrobial activity, although food-isolated pathogens have been poorly investigated. Herein, we describe the design and the structural-functional characterization of a new 1018-derivative peptide named 1018-K6, in which the alanine in position 6 was replaced with a lysine. Spectroscopic analysis revealed a noticeable switch from β-sheet to helical conformations of 1018-K6 respect to IDR-1018, with a faster folding kinetic and increased structural stability. Moreover, 1018-K6 evidenced a significant antibiofilm/bactericidal efficiency specifically against Listeria monocytogenes isolates from food-products and food-processing environments, belonging to serotype 4b involved in the majority of human-listeriosis cases, with EC50 values two- five-fold lower than those measured for IDR-1018. Therefore, a single amino-acid substitution in IDR-1018 sequence produced severe changes in peptide conformation and antimicrobial performances.
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Affiliation(s)
- Gianna Palmieri
- Institute of Biosciences and BioResources (IBBR)-UOS Na, National Research Council (CNR-IBBR), Via Pietro Castellino 111, 80131 Naples, Italy; Materias S.r.l., Corso N. Protopisani n. 50, 80146 Naples, Italy.
| | - Marco Balestrieri
- Institute of Biosciences and BioResources (IBBR)-UOS Na, National Research Council (CNR-IBBR), Via Pietro Castellino 111, 80131 Naples, Italy; Materias S.r.l., Corso N. Protopisani n. 50, 80146 Naples, Italy
| | - Federico Capuano
- Department of Food Microbiology, Istituto Zooprofilattico Sperimentale del Mezzogiorno, via della salute, 2, 80055 Portici, Italy
| | - Yolande T R Proroga
- Department of Food Microbiology, Istituto Zooprofilattico Sperimentale del Mezzogiorno, via della salute, 2, 80055 Portici, Italy
| | - Francesco Pomilio
- National reference laboratory for Listeria monocytogenes, Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise, Via Campo Boario 1, 64100 Teramo, Italy
| | - Patrizia Centorame
- National reference laboratory for Listeria monocytogenes, Istituto Zooprofilattico Sperimentale dell'Abruzzo e del Molise, Via Campo Boario 1, 64100 Teramo, Italy
| | - Alessia Riccio
- Institute of Biosciences and BioResources (IBBR)-UOS Na, National Research Council (CNR-IBBR), Via Pietro Castellino 111, 80131 Naples, Italy
| | - Raffaele Marrone
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Via Federico Delpino 1, 80137 Naples, Italy
| | - Aniello Anastasio
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Via Federico Delpino 1, 80137 Naples, Italy
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171
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Wang J, Chou S, Yang Z, Yang Y, Wang Z, Song J, Dou X, Shan A. Combating Drug-Resistant Fungi with Novel Imperfectly Amphipathic Palindromic Peptides. J Med Chem 2018; 61:3889-3907. [PMID: 29648811 DOI: 10.1021/acs.jmedchem.7b01729] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Antimicrobial peptides are an important weapon against invading pathogens and are potential candidates as novel antibacterial agents, but their antifungal activities are not fully developed. In this study, a set of imperfectly amphipathic peptides was developed based on the imperfectly amphipathic palindromic structure R n(XRXXXRX)R n ( n = 1, 2; X represents L, I, F, or W), and the engineered peptides exhibited high antimicrobial activities against all fungi and bacteria tested (including fluconazole-resistant Candida albicans), with geometric mean (GM) MICs ranging from 2.2 to 6.62 μM. Of such peptides, 13 (I6) (RRIRIIIRIRR-NH2) that was Ile rich in its hydrophobic face had the highest antifungal activity (GMfungi = 1.64 μM) while showing low toxicity and high salt and serum tolerance. It also had dramatic LPS-neutralizing propensity and a potent membrane-disruptive mechanism against microbial cells. In summary, these findings were useful for short AMPs design to combat the growing threat of drug-resistant fungal and bacterial infections.
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Affiliation(s)
- Jiajun Wang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Shuli Chou
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Zhanyi Yang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Yang Yang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Zhihua Wang
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Jing Song
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Xiujing Dou
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
| | - Anshan Shan
- Institute of Animal Nutrition , Northeast Agricultural University , Harbin 150030 , P. R. China
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172
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Conjugates and nano-delivery of antimicrobial peptides for enhancing therapeutic activity. J Drug Deliv Sci Technol 2018. [DOI: 10.1016/j.jddst.2017.12.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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173
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Shao C, Tian H, Wang T, Wang Z, Chou S, Shan A, Cheng B. Central β-turn increases the cell selectivity of imperfectly amphipathic α-helical peptides. Acta Biomater 2018; 69:243-255. [PMID: 29355714 DOI: 10.1016/j.actbio.2018.01.009] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 01/09/2018] [Accepted: 01/09/2018] [Indexed: 12/19/2022]
Abstract
Although membrane lytic antimicrobial peptides (AMPs) show enormous potential for addressing mounting global antibiotic resistance, therapeutic applications are hindered by their weak antimicrobial activity, high toxicity, salt sensitivity and poor understanding of structure-activity relationships. To investigate the effects of different parameters on the biological activities of AMPs, a rational approach was adopted to design a series of short cationic α-helical peptides comprising the Ac-WxKyWxzzyKxWyK-NH2 sequence, where x: cationic residues (Arg or Lys), y: hydrophobic residues (Ala, Val, Ile or Leu), and zz: β-turn (rigid D-Pro-Gly turn or flexible Gly-Gly turn). The peptides showed a more helical structure as the concentration of membrane-mimetic solution increased. The peptide RL with a central D-Pro-Gly turn (x: Arg, y: Lys, zz = D-Pro-Gly) exhibited broad-spectrum antimicrobial activities (2-8 μM) against ten types of clinically relevant microorganisms and even maintained its activity in the presence of physiological salts and showed excellent selectivity toward bacterial cells over human red blood cells and mammalian cells. However, the toxicity was increased after the removal of D-Pro-Gly turn. Additionally, the bactericidal activity was reduced when the D-Pro-Gly turn was replaced by a Gly-Gly turn. Fluorescence spectroscopy and electron microscopy analyses indicated that RL and its derivatives killed microbial cells by permeabilizing the cell membrane and damaging membrane integrity. In conclusion, these findings clearly generalized a potential method for designing or optimizing AMPs, and the peptide RL is a promising therapeutic candidate to combat antibiotic resistance. STATEMENT OF SIGNIFICANCE We proposed a rational approach to design imperfectly amphiphilic peptides and identified RL (Ac-WRKLWRpGLKRWLK-NH2) in particular that shows strong antibacterial properties, low toxicity and high salt resistance. The β-turn unit inserted into the central position of cationic α-helical peptides, especially the D-Pro-Gly turn, significantly increase the cell selectivity of the synthetic amphiphiles. The findings demonstrate a potential method for designing and/or optimizing AMPs, which would facilitate the development of strategies to design peptide-based antimicrobial biomaterials in a variety of biotechnological and clinical applications.
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174
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Gong Z, Ikonomova SP, Karlsson AJ. Secondary structure of cell-penetrating peptides during interaction with fungal cells. Protein Sci 2018; 27:702-713. [PMID: 29247564 PMCID: PMC5818750 DOI: 10.1002/pro.3364] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Revised: 12/13/2017] [Accepted: 12/14/2017] [Indexed: 12/30/2022]
Abstract
Cell-penetrating peptides (CPPs) are peptides that cross cell membranes, either alone or while carrying molecular cargo. Although their interactions with mammalian cells have been widely studied, much less is known about their interactions with fungal cells, particularly at the biophysical level. We analyzed the interactions of seven CPPs (penetratin, Pep-1, MPG, pVEC, TP-10, MAP, and cecropin B) with the fungal pathogen Candida albicans using experiments and molecular simulations. Circular dichroism (CD) of the peptides revealed a structural transition from a random coil or weak helix to an α-helix occurs for all peptides when the solvent is changed from aqueous to hydrophobic. However, CD performed in the presence of C. albicans cells showed that proximity to the cell membrane is not necessarily sufficient to induce this structural transition, as penetratin, Pep-1, and MPG did not display a structural shift in the presence of cells. Monte Carlo simulations were performed to further probe the molecular-level interaction with the cell membrane, and these simulations suggested that pVEC, TP-10, MAP, and cecropin B strongly penetrate into the hydrophobic domain of the membrane lipid bilayer, inducing a transition to an α-helical conformation. In contrast, penetratin, Pep-1 and MPG remained in the hydrophilic region without a shift in conformation. The experimental data and MC simulations combine to explain how peptide structure affects their interaction with cells and their mechanism of translocation into cells (direct translocation vs. endocytosis). Our work also highlights the utility of combining biophysical experiments, biological experiments, and molecular modeling to understand biological phenomena.
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Affiliation(s)
- Zifan Gong
- Department of Chemical and Biomolecular EngineeringUniversity of Maryland, 2113 Chemical and Nuclear Engineering Building (#090), College ParkMaryland20742
| | - Svetlana P. Ikonomova
- Department of Chemical and Biomolecular EngineeringUniversity of Maryland, 2113 Chemical and Nuclear Engineering Building (#090), College ParkMaryland20742
| | - Amy J. Karlsson
- Department of Chemical and Biomolecular EngineeringUniversity of Maryland, 2113 Chemical and Nuclear Engineering Building (#090), College ParkMaryland20742
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175
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Karathanasi G, Bojer MS, Baldry M, Johannessen BA, Wolff S, Greco I, Kilstrup M, Hansen PR, Ingmer H. Linear peptidomimetics as potent antagonists of Staphylococcus aureus agr quorum sensing. Sci Rep 2018; 8:3562. [PMID: 29476092 PMCID: PMC5824847 DOI: 10.1038/s41598-018-21951-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 02/14/2018] [Indexed: 01/27/2023] Open
Abstract
Staphylococcus aureus is an important pathogen causing infections in humans and animals. Increasing problems with antimicrobial resistance has prompted the development of alternative treatment strategies, including antivirulence approaches targeting virulence regulation such as the agr quorum sensing system. agr is naturally induced by cyclic auto-inducing peptides (AIPs) binding to the AgrC receptor and cyclic peptide inhibitors have been identified competing with AIP binding to AgrC. Here, we disclose that small, linear peptidomimetics can act as specific and potent inhibitors of the S. aureus agr system via intercepting AIP-AgrC signal interaction at low micromolar concentrations. The corresponding linear peptide did not have this ability. This is the first report of a linear peptide-like molecule that interferes with agr activation by competitive binding to AgrC. Prospectively, these peptidomimetics may be valuable starting scaffolds for the development of new inhibitors of staphylococcal quorum sensing and virulence gene expression.
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Affiliation(s)
- Georgia Karathanasi
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Stigbøjlen 4, 1870 Frederiksberg, Denmark
| | - Martin Saxtorph Bojer
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Stigbøjlen 4, 1870 Frederiksberg, Denmark
| | - Mara Baldry
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Stigbøjlen 4, 1870 Frederiksberg, Denmark
| | - Bárdur Andréson Johannessen
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Stigbøjlen 4, 1870 Frederiksberg, Denmark
| | - Sanne Wolff
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Stigbøjlen 4, 1870 Frederiksberg, Denmark
| | - Ines Greco
- Department of Drug Design and Farmacology, Faculty of Health and Medical Sciences University of Copenhagen, Universitetsparken 2, 2100, København, Denmark
| | - Mogens Kilstrup
- Department of Biotechnology and Biomedicine, Metabolic Signaling and Regulation, Technical University of Denmark, Matematiktorvet, 2800, Lyngby, Denmark
| | - Paul Robert Hansen
- Department of Drug Design and Farmacology, Faculty of Health and Medical Sciences University of Copenhagen, Universitetsparken 2, 2100, København, Denmark
| | - Hanne Ingmer
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Stigbøjlen 4, 1870 Frederiksberg, Denmark.
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176
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Understanding the antimicrobial properties/activity of an 11-residue Lys homopeptide by alanine and proline scan. Amino Acids 2018; 50:557-568. [DOI: 10.1007/s00726-018-2542-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 02/11/2018] [Indexed: 12/20/2022]
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177
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Role of Cationic Side Chains in the Antimicrobial Activity of C18G. Molecules 2018; 23:molecules23020329. [PMID: 29401708 PMCID: PMC6017431 DOI: 10.3390/molecules23020329] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 01/23/2018] [Accepted: 02/01/2018] [Indexed: 01/08/2023] Open
Abstract
Antimicrobial peptides (AMPs) have been an area of great interest, due to the high selectivity of these molecules toward bacterial targets over host cells and the limited development of bacterial resistance to these molecules throughout evolution. The peptide C18G has been shown to be a selective, broad spectrum AMP with a net +8 cationic charge from seven lysine residues in the sequence. In this work, the cationic Lys residues were replaced with other natural or non-proteinogenic cationic amino acids: arginine, histidine, ornithine, or diaminopropionic acid. These changes vary in the structure of the amino acid side chain, the identity of the cationic moiety, and the pKa of the cationic group. Using a combination of spectroscopic and microbiological methods, the influence of these cationic groups on membrane binding, secondary structure, and antibacterial activity was investigated. The replacement of Lys with most other cationic residues had, at most, 2-fold effects on minimal inhibitory concentration against a variety of Gram-positive and Gram-negative bacteria. However, the peptide containing His as the cationic group showed dramatically reduced activity. All peptide variants retained the ability to bind lipid vesicles and showed clear preference for binding vesicles that contained anionic lipids. Similarly, all peptides adopted a helical conformation when bound to lipids or membrane mimetics, although the peptide containing diaminopropionic acid exhibited a decreased helicity. The peptides exhibited a wider variety of activity in the permeabilization of bacterial membranes, with peptides containing Lys, Arg, or Orn being the most broadly active. In all, the antibacterial activity of the C18G peptide is generally tolerant to changes in the structure and identity of the cationic amino acids, yielding new possibilities for design and development of AMPs that may be less susceptible to immune and bacterial recognition or in vivo degradation.
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178
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Lima de Oliveira A, Maffud Cilli E, Ros U, Crusca E, Lanio ME, Alvarez C, Schreier S, Aguiar Pertinhez T, Spisni A. Insights on the structure-activity relationship of peptides derived from Sticholysin II. Biopolymers 2018; 110. [PMID: 29359791 DOI: 10.1002/bip.23097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Revised: 11/26/2017] [Accepted: 12/03/2017] [Indexed: 02/06/2023]
Abstract
Sticholysin II (StII) is a pore-forming actinoporin from the sea anemone Stichodactyla helianthus. A mechanistic model of its action has been proposed: proteins bind to cell membrane, insert their N-termini into the lipid core and assemble into homo-tetramer pores responsible for host-cell death. Because very likely the first 10 residues of StII N-terminus are critical for membrane penetration, to dissect the molecular details of that functionality, we studied two synthetic peptides: StII1-30 and StII16-35 . They show diverse haemolytic and candidacidal activity that correlate with distinct orientations in SDS micelles. NMR shows that StII1-30 partly inserts into the micelle, while StII16-35 lays on the micelle surface. These results justify the diverse concentration dependence of their candidacidal activity supposing a different mechanism of action and providing new hints on StII lytic activity at molecular level. Biotechnological application of these peptides, focused on the development of therapeutic immunocomplexes, may be envisaged.
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Affiliation(s)
- Aline Lima de Oliveira
- Institute of Chemistry, University of Brasilia, Brasilia, DF, Brazil
- Department of Biochemistry and Chemical Technology, Institute of Chemistry, São Paulo State University, Araraquara, Brazil
| | | | - Uris Ros
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - Edson Crusca
- Center for Protein Studies, Biology Faculty, University of Havana, Havana, Cuba
| | - María Eliana Lanio
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
| | - Carlos Alvarez
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, São Paulo, Brazil
- Department of Medicine and Surgery, Unit of Biochemistry, University of Parma, Parma, Italy
| | - Shirley Schreier
- Department of Medicine and Surgery, Unit of Biochemistry, University of Parma, Parma, Italy
| | - Thelma Aguiar Pertinhez
- Department of Biochemistry and Chemical Technology, Institute of Chemistry, São Paulo State University, Araraquara, Brazil
- Transfusion Medicine Unit, AUSL - IRCCS Reggio Emilia, Italy
| | - Alberto Spisni
- Department of Biochemistry and Chemical Technology, Institute of Chemistry, São Paulo State University, Araraquara, Brazil
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179
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Dong N, Wang Z, Chou S, Zhang L, Shan A, Jiang J. Antibacterial activities and molecular mechanism of amino-terminal fragments from pig nematode antimicrobial peptide CP-1. Chem Biol Drug Des 2018; 91:1017-1029. [PMID: 29266746 DOI: 10.1111/cbdd.13165] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 10/18/2017] [Accepted: 12/07/2017] [Indexed: 12/20/2022]
Abstract
High manufacturing costs and weak cell selectivity have limited the clinical application of naturally occurring peptides when faced with an outbreak of drug resistance. To overcome these limitations, a set of antimicrobial peptides was synthesized with the general sequence of (WL)n, where n = 1, 2, 3, and WL was truncated from the N-terminus of Cecropin P1 without initial serine residues. The antimicrobial peptide WL3 exhibited stronger antimicrobial activity against both Gram-negative and Gram-positive microbes than the parental peptide CP-1. WL3 showed no hemolysis even at the highest test concentrations compared to the parental peptide CP-1. The condition sensitivity assays (salts, serum, and trypsin) demonstrated that WL3 had high stability in vitro. Fluorescence spectroscopy and electron microscopy indicated that WL3 killed microbes by means of penetrating the membrane and causing cell lysis. In a mouse model, WL3 was able to significantly reduce the bacteria load in major organs and cytokines (TNF-α, IL-6, and IL-1β) levels in serum. In summary, these findings suggest that WL3, which was modified from a natural antimicrobial peptide, has enormous potential for application as a novel antibacterial agent.
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Affiliation(s)
- Na Dong
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Zhihua Wang
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Shuli Chou
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Licong Zhang
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Anshan Shan
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Junguang Jiang
- The State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
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180
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Olivieri C, Bugli F, Menchinelli G, Veglia G, Buonocore F, Scapigliati G, Stocchi V, Ceccacci F, Papi M, Sanguinetti M, Porcelli F. Design and characterization of chionodracine-derived antimicrobial peptides with enhanced activity against drug-resistant human pathogens. RSC Adv 2018; 8:41331-41346. [PMID: 35559296 PMCID: PMC9091591 DOI: 10.1039/c8ra08065h] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 11/21/2018] [Indexed: 11/21/2022] Open
Abstract
Design of new chionodracine-derived peptides with potent activity against drug-resistant human pathogens.
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Affiliation(s)
- Cristina Olivieri
- Department for Innovation in Biological, Agrofood and Forest Systems
- University of Tuscia
- 01100 Viterbo
- Italy
- Department of Biochemistry, Molecular Biology and Biophysics
| | - Francesca Bugli
- Microbiology Institute
- Catholic University of Sacred Heart
- Rome
- Italy
| | | | - Gianluigi Veglia
- Department of Chemistry
- University of Minnesota
- Minneapolis
- 55455 USA
- Department of Biochemistry, Molecular Biology and Biophysics
| | - Francesco Buonocore
- Department for Innovation in Biological, Agrofood and Forest Systems
- University of Tuscia
- 01100 Viterbo
- Italy
| | - Giuseppe Scapigliati
- Department for Innovation in Biological, Agrofood and Forest Systems
- University of Tuscia
- 01100 Viterbo
- Italy
| | - Valentina Stocchi
- Department for Innovation in Biological, Agrofood and Forest Systems
- University of Tuscia
- 01100 Viterbo
- Italy
| | - Francesca Ceccacci
- CNR – Institute of Chemical Methodologies
- Sezione Meccanismi di Reazione UOS of Rome
- Rome
- Italy
| | | | | | - Fernando Porcelli
- Department for Innovation in Biological, Agrofood and Forest Systems
- University of Tuscia
- 01100 Viterbo
- Italy
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181
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He SW, Wang GH, Yue B, Zhou S, Zhang M. TO17: A teleost antimicrobial peptide that induces degradation of bacterial nucleic acids and inhibits bacterial infection in red drum, Sciaenops ocellatus. FISH & SHELLFISH IMMUNOLOGY 2018; 72:639-645. [PMID: 29183811 DOI: 10.1016/j.fsi.2017.11.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 11/16/2017] [Accepted: 11/19/2017] [Indexed: 06/07/2023]
Abstract
Tissue factor pathway inhibitor (TFPI)-1 is well known for its role as an inhibitor of blood coagulation. Several studies have demonstrated that the C-terminal peptides of TFPI-1 are active against a broad spectrum of microorganisms. In a previous study, we found that TO17 (with 17 amino acids), a TFPI-1 C-terminal peptide from red drum (Sciaenops ocellatus), was active against Edwardsiella tarda. In the present study, we investigated further the antimicrobial spectrum, action mode, as well as the immunostimulatory property of TO17. Our results showed that TO17 displayed antimicrobial activity against Staphylococcus aureus, Micrococcus luteus, Vibrio vulnificus, and infectious spleen and kidney necrosis virus, independent of host serum. Furthermore, the activity of TO17 was influenced by the length or type of amino acids at the N and C termini. During its interaction with V. vulnificus, TO17 exerted its antibacterial activity by destroying cell membrane integrity, penetrating the cytoplasm and inducing degradation of genomic DNA and total RNA. In addition, TO17 had no hemolytic activity against red drum blood cells. In vitro, TO17 enhanced production of nitric oxide and bactericidal activity of red drum macrophages. In vivo, administration of red drum with TO17 before bacterial infection significantly reduced pathogen dissemination and replication in tissues. These results indicate that TO17 is a broad-spectrum antimicrobial peptide with immunostimulatory properties and it has the potential to be used as an antimicrobial agent in aquaculture.
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Affiliation(s)
- Shu-Wen He
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Guang-Hua Wang
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Bin Yue
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Shun Zhou
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Min Zhang
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China.
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182
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Dong N, Li XR, Xu XY, Lv YF, Li ZY, Shan AS, Wang JL. Characterization of bactericidal efficiency, cell selectivity, and mechanism of short interspecific hybrid peptides. Amino Acids 2017; 50:453-468. [PMID: 29282543 DOI: 10.1007/s00726-017-2531-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Accepted: 12/14/2017] [Indexed: 12/14/2022]
Abstract
Facing rising global antibiotics resistance, physical membrane-damaging antimicrobial peptides (AMPs) represent promising antimicrobial agents. Various strategies to design effective hybrid peptides offer many advantages in overcoming the adverse effects of natural AMPs. In this study, hybrid peptides from different species were investigated, and three hybrid antimicrobial peptides, LI, LN, and LC, were designed by combining the typical fragment of human cathelicidin-derived LL37 with either indolicidin, pig nematode cecropin P1 (CP-1) or rat neutrophil peptide-1 (NP-1). In an aqueous solution, all hybrid peptides had an unordered conformation. In simulated membrane conditions, the hybrid peptide LI displayed more β-turn and β-hairpin structures, whereas LN and LC folded into α-helix structures. The three interspecific hybrid peptides LI, LN, and LC exhibited different levels of antimicrobial activity against Gram-positive and Gram-negative bacteria. LI demonstrated the highest antimicrobial activity and cell selectivity. The results of the swimming motility indicated that LI repressed bacterial motility in a concentration-dependent method. Endotoxin binding assay demonstrated that hybrid peptide LI conserved the binding ability to LPS (polyanionic lipopolysaccharides) of its parental peptides. Fluorescence assays, flow cytometry, and SEM further revealed that hybrid peptide LI acted through different bacteriostatic mechanisms than LL37 and indolicidin and that LI killed bacterial cells via membrane damage. In summary, this study demonstrated that hybrid peptide LI produced by interspecific hybrid synthesis possessed strong cell selectivity and is a promising therapeutic candidate for drug-resistant bacteria infection.
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Affiliation(s)
- N Dong
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, People's Republic of China
| | - X R Li
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, People's Republic of China
| | - X Y Xu
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, People's Republic of China
| | - Y F Lv
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, People's Republic of China
| | - Z Y Li
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, People's Republic of China
| | - A S Shan
- Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, People's Republic of China.
| | - J L Wang
- College of Animal Science and Veterinary Medicine, Jinzhou Medical University, Jinzhou, People's Republic of China
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183
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Differential Interaction of Antimicrobial Peptides with Lipid Structures Studied by Coarse-Grained Molecular Dynamics Simulations. Molecules 2017; 22:molecules22101775. [PMID: 29053635 PMCID: PMC6151434 DOI: 10.3390/molecules22101775] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Accepted: 10/17/2017] [Indexed: 01/05/2023] Open
Abstract
In this work; we investigated the differential interaction of amphiphilic antimicrobial peptides with 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) lipid structures by means of extensive molecular dynamics simulations. By using a coarse-grained (CG) model within the MARTINI force field; we simulated the peptide-lipid system from three different initial configurations: (a) peptides in water in the presence of a pre-equilibrated lipid bilayer; (b) peptides inside the hydrophobic core of the membrane; and (c) random configurations that allow self-assembled molecular structures. This last approach allowed us to sample the structural space of the systems and consider cooperative effects. The peptides used in our simulations are aurein 1.2 and maculatin 1.1; two well-known antimicrobial peptides from the Australian tree frogs; and molecules that present different membrane-perturbing behaviors. Our results showed differential behaviors for each type of peptide seen in a different organization that could guide a molecular interpretation of the experimental data. While both peptides are capable of forming membrane aggregates; the aurein 1.2 ones have a pore-like structure and exhibit a higher level of organization than those conformed by maculatin 1.1. Furthermore; maculatin 1.1 has a strong tendency to form clusters and induce curvature at low peptide-lipid ratios. The exploration of the possible lipid-peptide structures; as the one carried out here; could be a good tool for recognizing specific configurations that should be further studied with more sophisticated methodologies.
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184
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Smart M, Rajagopal A, Liu WK, Ha BY. Opposing effects of cationic antimicrobial peptides and divalent cations on bacterial lipopolysaccharides. Phys Rev E 2017; 96:042405. [PMID: 29347628 DOI: 10.1103/physreve.96.042405] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Indexed: 12/15/2022]
Abstract
The permeability of the bacterial outer membrane, enclosing Gram-negative bacteria, depends on the interactions of the outer, lipopolysaccharide (LPS) layer, with surrounding ions and molecules. We present a coarse-grained model for describing how cationic amphiphilic molecules (e.g., antimicrobial peptides) interact with and perturb the LPS layer in a biologically relevant medium, containing monovalent and divalent salt ions (e.g., Mg^{2+}). In our approach, peptide binding is driven by electrostatic and hydrophobic interactions and is assumed to expand the LPS layer, eventually priming it for disruption. Our results suggest that in parameter ranges of biological relevance (e.g., at micromolar concentrations) the antimicrobial peptide magainin 2 effectively disrupts the LPS layer, even though it has to compete with Mg^{2+} for the layer. They also show how the integrity of LPS is restored with an increasing concentration of Mg^{2+}. Using the approach, we make a number of predictions relevant for optimizing peptide parameters against Gram-negative bacteria and for understanding bacterial strategies to develop resistance against cationic peptides.
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Affiliation(s)
- Matthew Smart
- Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Aruna Rajagopal
- Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Wing-Ki Liu
- Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Bae-Yeun Ha
- Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
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185
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Mode of action of plectasin-derived peptides against gas gangrene-associated Clostridium perfringens type A. PLoS One 2017; 12:e0185215. [PMID: 28934314 PMCID: PMC5608353 DOI: 10.1371/journal.pone.0185215] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 09/10/2017] [Indexed: 11/19/2022] Open
Abstract
NZ2114 and MP1102 are novel plectasin-derived peptides with potent activity against Gram-positive bacteria. The antibacterial characteristics and mechanism of NZ2114 and MP1102 against gas gangrene-associated Clostridium perfringens were studied for the first time. The minimal inhibitory concentration and minimal bactericidal concentration of NZ2114 and MP1102 against resistant C. perfringens type A strain CVCC 46 were 0.91 μM. Based on the fractional inhibitory concentration index (FICI) result, an additive or synergic effect was observed between NZ2114 (FICI = 0.5~0.75) or MP1102 (FICI = 0.375~1.0) and antibiotics. The flow cytometry, scanning and transmission electron microscopy analysis showed that both NZ2114 and MP1102 induced obviously membrane damage, such as the leakage of cellular materials, partial disappearance of the cell membrane and membrane peeling, as well as retracting cytoplasm and ghost cell. The gel retardation and circular dichroism (CD) detection showed that NZ2114 and MP1102 could bind to C. perfringens genomic DNA and change the DNA conformation. Moreover, NZ2114 also interfered with the double helix and unwind the genomic DNA. The cell cycle analysis showed that C. perfringens CVCC 46 cells exposed to NZ2114 and MP1102 were arrested at the phase I. These data indicated that both NZ2114 and MP1102 have potential as new antimicrobial agents for gas gangrene infection resulting from resistant C. perfringens.
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186
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Lima SMF, Freire MS, Gomes ALO, Cantuária APC, Dutra FRP, Magalhães BS, Sousa MGC, Migliolo L, Almeida JA, Franco OL, Rezende TMB. Antimicrobial and immunomodulatory activity of host defense peptides, clavanins and LL-37, in vitro: An endodontic perspective. Peptides 2017; 95:16-24. [PMID: 28712894 DOI: 10.1016/j.peptides.2017.07.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 07/06/2017] [Accepted: 07/07/2017] [Indexed: 01/19/2023]
Abstract
Endodontic treatment is mainly based on root canal disinfection and its failure may be motivated by microbial resistance. Endodontic therapy can be benefitted by host defense peptides (HDPs), which are multifunctional molecules that act against persistent infection and inflammation. This study aimed to evaluate the antimicrobial, cytotoxic and immunomodulatory activity of several HDPs, namely clavanin A, clavanin A modified (MO) and LL-37, compared to intracanal medication Ca(OH)2. HDPs and Ca(OH)2 were evaluated by: (1) antimicrobial assays against Candida albicans and Enterococcus faecalis, (2) cytotoxicity assays and (3) cytokine tumor necrosis factor (TNF)-α, monocyte chemoattractant protein (MCP)-1, interleukin (IL)-1α, IL-6, IL-10 and IL-12 and nitric oxide (NO) production by RAW 264.7 cells incubated with or without heat-killed (HK) C. albicans or E. faecalis combined or not with interferon-γ. The minimum inhibitory concentration (MIC) was established only for E. faecalis (LL-37, 57μM). Considering cytotoxicity, clavanin MO was able to reduce cell viability in many groups and demonstrated lowest LC50. The Ca(OH)2 up-regulated the production of MCP-1, TNF-α, IL-12 and IL-6 and down-regulated IL-1α, IL-10 and NO. Clavanins up-regulated the TNF-α and NO and down-regulated IL-10 production. LL-37 demonstrated up-regulation of IL-6 and TNF-α production and down-regulation in IL-10 and NO production. In conclusion, LL-37 demonstrated better antibacterial potential. In addition, Ca(OH)2 demonstrated a proinflammatory response, while the HDPs modulated the inflammatory response from non-interference with the active cytokines in the osteoclastogenesis process, probably promoting the health of periradicular tissues.
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Affiliation(s)
- Stella Maris F Lima
- Curso de Odontologia, Universidade Católica de Brasília, Campus I, QS 07 Lote 01 EPCT, 71966-700, Águas Claras, Brasília, Distrito Federal, Brazil; Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Campus Avançado Asa Norte, SGAN 916 Módulo B Avenida W5, 70790-160, Brasília, Distrito Federal, Brazil
| | - Mirna S Freire
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Campus Avançado Asa Norte, SGAN 916 Módulo B Avenida W5, 70790-160, Brasília, Distrito Federal, Brazil; Programa de Doutorado da Rede Centro-Oeste, Universidade de Brasília, Campus Universitário Darcy Ribeiro, 70910-900, Brasília, DF, Brazil
| | - Ana Luisa O Gomes
- Curso de Odontologia, Universidade Católica de Brasília, Campus I, QS 07 Lote 01 EPCT, 71966-700, Águas Claras, Brasília, Distrito Federal, Brazil; Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Campus Avançado Asa Norte, SGAN 916 Módulo B Avenida W5, 70790-160, Brasília, Distrito Federal, Brazil
| | - Ana Paula C Cantuária
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Campus Avançado Asa Norte, SGAN 916 Módulo B Avenida W5, 70790-160, Brasília, Distrito Federal, Brazil; Programa de Pós-Graduação em Ciências da Saúde, Universidade de Brasília, Brasília, DF, Brazil
| | - Flávia Rodrigues P Dutra
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Campus Avançado Asa Norte, SGAN 916 Módulo B Avenida W5, 70790-160, Brasília, Distrito Federal, Brazil
| | - Beatriz S Magalhães
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Campus Avançado Asa Norte, SGAN 916 Módulo B Avenida W5, 70790-160, Brasília, Distrito Federal, Brazil; Grupo de Engenharia Metabólica Aplicada a Bioprocessos, Instituto de Ciências Biológicas, Universidade de Brasília, Brasília, DF, Brazil
| | - Maurício Gonçalves C Sousa
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Campus Avançado Asa Norte, SGAN 916 Módulo B Avenida W5, 70790-160, Brasília, Distrito Federal, Brazil
| | - Ludovico Migliolo
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Campus Avançado Asa Norte, SGAN 916 Módulo B Avenida W5, 70790-160, Brasília, Distrito Federal, Brazil; S-Inova Biotech, Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco, Av. Tamandaré, 6000, Jardim Seminário, 79117-900, Campo Grande, Mato Grosso do Sul, Brazil
| | - Jeeser A Almeida
- Programa de Pós Graduação em Saúde e Desenvolvimento na Região Centro-Oeste, Universidade Federal de Mato Grosso do Sul, Av. Costa e Silva, Cidade Universitária, 79070-900, Campo Grande, Mato Grosso do Sul, Brazil
| | - Octávio L Franco
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Campus Avançado Asa Norte, SGAN 916 Módulo B Avenida W5, 70790-160, Brasília, Distrito Federal, Brazil; Programa de Doutorado da Rede Centro-Oeste, Universidade de Brasília, Campus Universitário Darcy Ribeiro, 70910-900, Brasília, DF, Brazil; S-Inova Biotech, Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco, Av. Tamandaré, 6000, Jardim Seminário, 79117-900, Campo Grande, Mato Grosso do Sul, Brazil
| | - Taia Maria B Rezende
- Curso de Odontologia, Universidade Católica de Brasília, Campus I, QS 07 Lote 01 EPCT, 71966-700, Águas Claras, Brasília, Distrito Federal, Brazil; Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Campus Avançado Asa Norte, SGAN 916 Módulo B Avenida W5, 70790-160, Brasília, Distrito Federal, Brazil; Programa de Pós-Graduação em Ciências da Saúde, Universidade de Brasília, Brasília, DF, Brazil.
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187
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Liu B, Zhang W, Gou S, Huang H, Yao J, Yang Z, Liu H, Zhong C, Liu B, Ni J, Wang R. Intramolecular cyclization of the antimicrobial peptide Polybia-MPI with triazole stapling: influence on stability and bioactivity. J Pept Sci 2017; 23:824-832. [PMID: 28833783 DOI: 10.1002/psc.3031] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 06/14/2017] [Accepted: 07/17/2017] [Indexed: 12/23/2022]
Abstract
Cationic antimicrobial peptides have attracted increasing attention as a novel class of antibiotics to treat infectious diseases caused by pathogenic bacteria. However, susceptibility to protease is a shortcoming in their development. Cyclization is one approach to increase the proteolytic resistance of peptides. Therefore, to improve the proteolytic resistance of Polybia-MPI, we have synthesized the MPI cyclic analogs C-MPI-1 (i-to-i+4) and C-MPI-2 (i-to-i+6) by copper(I)-catalyzed azide-alkyne cycloaddition. Compared with MPI, C-MPI-1 displayed sustained antimicrobial activity and had enhanced anti-trypsin resistance, while C-MPI-2 displayed no antimicrobial activity. The relationship between peptide structure and bioactivity was further investigated by probing the secondary structure of the peptides by circular dichroism. This showed that C-MPI-1 adopted an α-helical structure in aqueous solution and, interestingly, had increased α-helical conformation in 30 mM sodium dodecyl sulfate and 50% trifluoroethyl alcohol compared with MPI. C-MPI-2 that was not α-helical in structure, suggesting that the propensity for α-helix conformation may play an important role in cyclic peptide design. In addition, scanning electron microscopy, propidium iodide uptake, and membrane permeabilization assays indicated that MPI and the optimized analog C-MPI-1 had membrane-active action modes, indicating that the peptides would not be susceptible to conventional resistance mechanisms. Our study provides additional insight into the influence of intramolecular cyclization at various positions on peptide structure and biological activity. In conclusion, the design and synthesis of cyclic analogs via click chemistry offer a new strategy for the development of stable antimicrobial agents. Copyright © 2017 European Peptide Society and John Wiley & Sons, Ltd.
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Affiliation(s)
- Beijun Liu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China.,School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Wei Zhang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Sanhu Gou
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China
| | - Haifeng Huang
- Shaanxi Provincial People's Hospital, Shanxi, 710068, China
| | - Jia Yao
- The First Hospital of Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, China
| | - Zhibin Yang
- Key Laboratory of Entomological Biopharmaceutical R&D of Yunnan Province, Dali University, Dali, 671000, China
| | - Hui Liu
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Chao Zhong
- School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Beiyin Liu
- Affiliated Hospital of Gansu University of Chinese Medicine, Lanzhou, 730000, China
| | - Jingman Ni
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China.,School of Pharmacy, Lanzhou University, Lanzhou, 730000, China
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou, 730000, China
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188
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Wang HF, Wibowo D, Shao Z, Middelberg APJ, Zhao CX. Design of Modular Peptide Surfactants and Their Surface Activity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7957-7967. [PMID: 28732169 DOI: 10.1021/acs.langmuir.7b01382] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Designed peptide surfactants offer a number of advanced properties over conventional petrochemical surfactants, including biocompatibility, sustainability, and tailorability of the chemical and physical properties through peptide design. Their biocompatibility and degradability make them attractive for various applications, particularly for food and pharmaceutical applications. In this work, two new peptide surfactants derived from an amphiphilic peptide surfactant (AM1) were designed (AM-S and C8-AM) to better understand links between structure, interfacial activity, and emulsification. Based on AM1, which has an interfacial α-helical structure, AM-S and C8-AM were designed to have two modules, that is, the α-helical AM1 module and an additional hydrophobic moiety to provide for better anchoring at the oil-water interface. Both AM-S and C8-AM at low bulk concentration of 20 μM were able to adsorb rapidly at the oil-water interface and reduced interfacial tension to equilibrium values of 17.0 and 8.4 mN/m within 400 s, respectively. Their relatively quick adsorption kinetics allowed the formation of nanoemulsions with smaller droplet sizes and narrower size distribution. AM-S and C8-AM at 800 μM bulk concentration could make nanoemulsions of average diameters 180 and 147 nm, respectively, by simple sonication. With respect to the long-term stability, a minimum peptide concentration of 400 μM for AM-S and a lower concentration of 100 μM for C8-AM were demonstrated to effectively stabilize nanoemulsions over 3 weeks. Compared to AM1, the AM-S nanoemulsion retained its stimuli-responsive function triggered by metal ions, whereas the C8-AM nanoemulsions did not respond to the stimuli as efficiently as AM-S because of the strong anchoring ability of the hydrophobic C8 module. The two-module design of AM-S and C8-AM represents a new strategy in tuning the surface activity of peptide surfactants, offering useful information and guidance of future designs.
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Affiliation(s)
- Hao-Fei Wang
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , St Lucia QLD 4072, Australia
| | - David Wibowo
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , St Lucia QLD 4072, Australia
| | - Zhengzhong Shao
- State Key Laboratory of Molecular Engineering of Polymers, Laboratory of Advanced Materials and Department of Macromolecular Science, Fudan University , Shanghai 200433, China
| | - Anton P J Middelberg
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , St Lucia QLD 4072, Australia
| | - Chun-Xia Zhao
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , St Lucia QLD 4072, Australia
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189
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Wang Y, Fan Y, Zhou Z, Tu H, Ren Q, Wang X, Ding L, Zhou X, Zhang L. De novo synthetic short antimicrobial peptides against cariogenic bacteria. Arch Oral Biol 2017; 80:41-50. [DOI: 10.1016/j.archoralbio.2017.03.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 02/17/2017] [Accepted: 03/23/2017] [Indexed: 01/10/2023]
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190
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Shang D, Meng X, Zhang D, Kou Z. Antibacterial activity of chensinin-1b, a peptide with a random coil conformation, against multiple-drug-resistant Pseudomonas aeruginosa. Biochem Pharmacol 2017; 143:65-78. [PMID: 28756209 DOI: 10.1016/j.bcp.2017.07.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 07/19/2017] [Indexed: 11/16/2022]
Abstract
Nosocomial infections caused by Pseudomonas aeruginosa are difficult to treat due to the low permeability of its outer membrane as well as to its remarkable ability to acquire further resistance to antibiotics. Chensinin-1b exhibited antibacterial activity against the tested multiple-drug-resistant bacteria with a MIC ranging between 1.56 and 50μM, except E. cloacae strain 0320 (MREC0320), P. fluorescens strain 0322 (MRPF0322) and E. aerogenes strain 0320 (MREA0320). However, the MIC (25μM) of chensinin-1b to multiple-drug-resistant P. aeruginosa strain (MRPA 0108) was 16-fold higher than that observed to P. aeruginosa susceptible strain CGMCC 1.860 (PA1860). Chensinin-1b was able to disturb the integration of the cytoplasmic membrane of PA1860 and MRPA0108 cells similarly, but the outer membrane permeability of MRPA0108 cells was significantly lower. This low permeability was associated with increased expression of lipopolysaccharide (LPS) in the outer membrane and a decrease in negatively charged phospholipids in the outer membrane leaflet. In addition, the biofilm of MRPA0108 was responsible for the reduced susceptibility to chensinin-1b. A higher concentration of chensinin-1b (12.5µM) was required to maximally inhibit the formation of MRPA0108 biofilm. Notably, chensinin-1b inhibited the formation of MRPA0108 biofilm at concentrations below its MIC value by down-regulating the level of PelA, algD, and PslA gene transcription. Importantly, chensinin-1b had a significant antibacterial effect against MRPA0108 in vivo. Administration of chensinin-1b to mice infected with MRPA 0108 significantly increased survival by 50-70%. Moreover, chensinin-1b reduced the production of pro-inflammatory mediators and correspondingly reduced lung and liver tissue damage in the mouse model of septic shock induced by MRPA 0108. Collectively, these results suggest that chensinin-1b could be an effective antibiotic against multiple-drug-resistant bacterial strains.
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Affiliation(s)
- Dejing Shang
- School of Life Science, Liaoning Normal University, Dalian 116081, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian 116081, China.
| | - Xin Meng
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Dongdong Zhang
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Zhiru Kou
- School of Life Science, Liaoning Normal University, Dalian 116081, China
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191
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D'Este F, Oro D, Boix-Lemonche G, Tossi A, Skerlavaj B. Evaluation of free or anchored antimicrobial peptides as candidates for the prevention of orthopaedic device-related infections. J Pept Sci 2017; 23:777-789. [DOI: 10.1002/psc.3026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 06/21/2017] [Accepted: 06/23/2017] [Indexed: 12/26/2022]
Affiliation(s)
- Francesca D'Este
- Department of Medicine; University of Udine; P.le Kolbe 4 33100 Udine Italy
| | - Debora Oro
- Department of Medicine; University of Udine; P.le Kolbe 4 33100 Udine Italy
| | | | - Alessandro Tossi
- Department of Life Sciences; University of Trieste; Via Giorgieri 5 34127 Trieste Italy
| | - Barbara Skerlavaj
- Department of Medicine; University of Udine; P.le Kolbe 4 33100 Udine Italy
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192
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Piotrowska U, Sobczak M, Oledzka E. Current state of a dual behaviour of antimicrobial peptides-Therapeutic agents and promising delivery vectors. Chem Biol Drug Des 2017; 90:1079-1093. [DOI: 10.1111/cbdd.13031] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Revised: 05/14/2017] [Accepted: 05/18/2017] [Indexed: 01/19/2023]
Affiliation(s)
- Urszula Piotrowska
- Chair of Inorganic and Analytical Chemistry; Department of Biomaterials Chemistry; Faculty of Pharmacy with the Laboratory Medicine Division; Medical University of Warsaw; Warsaw Poland
| | - Marcin Sobczak
- Chair of Inorganic and Analytical Chemistry; Department of Biomaterials Chemistry; Faculty of Pharmacy with the Laboratory Medicine Division; Medical University of Warsaw; Warsaw Poland
| | - Ewa Oledzka
- Chair of Inorganic and Analytical Chemistry; Department of Biomaterials Chemistry; Faculty of Pharmacy with the Laboratory Medicine Division; Medical University of Warsaw; Warsaw Poland
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193
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194
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Insight into the mechanism of action of temporin-SHa, a new broad-spectrum antiparasitic and antibacterial agent. PLoS One 2017; 12:e0174024. [PMID: 28319176 PMCID: PMC5358776 DOI: 10.1371/journal.pone.0174024] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 02/22/2017] [Indexed: 12/28/2022] Open
Abstract
Antimicrobial peptides (AMPs) are promising drugs to kill resistant pathogens. In contrast to bacteria, protozoan parasites, such as Leishmania, were little studied. Therefore, the antiparasitic mechanism of AMPs is still unclear. In this study, we sought to get further insight into this mechanism by focusing our attention on temporin-SHa (SHa), a small broad-spectrum AMP previously shown to be active against Leishmania infantum. To improve activity, we designed analogs of SHa and compared the antibacterial and antiparasitic mechanisms. [K3]SHa emerged as a highly potent compound active against a wide range of bacteria, yeasts/fungi, and trypanosomatids (Leishmania and Trypanosoma), with leishmanicidal intramacrophagic activity and efficiency toward antibiotic-resistant strains of S. aureus and antimony-resistant L. infantum. Multipassage resistance selection demonstrated that temporins-SH, particularly [K3]SHa, are not prone to induce resistance in Escherichia coli. Analysis of the mode of action revealed that bacterial and parasite killing occur through a similar membranolytic mechanism involving rapid membrane permeabilization and depolarization. This was confirmed by high-resolution imaging (atomic force microscopy and field emission gun-scanning electron microscopy). Multiple combined techniques (nuclear magnetic resonance, surface plasmon resonance, differential scanning calorimetry) allowed us to detail peptide-membrane interactions. [K3]SHa was shown to interact selectively with anionic model membranes with a 4-fold higher affinity (KD = 3 x 10−8 M) than SHa. The amphipathic α-helical peptide inserts in-plane in the hydrophobic lipid bilayer and disrupts the acyl chain packing via a detergent-like effect. Interestingly, cellular events, such as mitochondrial membrane depolarization or DNA fragmentation, were observed in L. infantum promastigotes after exposure to SHa and [K3]SHa at concentrations above IC50. Our results indicate that these temporins exert leishmanicidal activity via a primary membranolytic mechanism but can also trigger apoptotis-like death. The many assets demonstrated for [K3]SHa make this small analog an attractive template to develop new antibacterial/antiparasitic drugs.
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195
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Gagnon MC, Strandberg E, Grau-Campistany A, Wadhwani P, Reichert J, Bürck J, Rabanal F, Auger M, Paquin JF, Ulrich AS. Influence of the Length and Charge on the Activity of α-Helical Amphipathic Antimicrobial Peptides. Biochemistry 2017; 56:1680-1695. [PMID: 28282123 DOI: 10.1021/acs.biochem.6b01071] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hydrophobic mismatch is important for pore-forming amphipathic antimicrobial peptides, as demonstrated recently [Grau-Campistany, A., et al. (2015) Sci. Rep. 5, 9388]. A series of different length peptides have been generated with the heptameric repeat sequence KIAGKIA, called KIA peptides, and it was found that only those helices sufficiently long to span the hydrophobic thickness of the membrane could induce leakage in lipid vesicles; there was also a clear length dependence of the antimicrobial and hemolytic activities. For the original KIA sequences, the cationic charge increased with peptide length. The goal of this work is to examine whether the charge also has an effect on activity; hence, we constructed two further series of peptides with a sequence similar to those of the KIA peptides, but with a constant charge of +7 for all lengths from 14 to 28 amino acids. For both of these new series, a clear length dependence similar to that of KIA peptides was observed, indicating that charge has only a minor influence. Both series also showed a distinct threshold length for peptides to be active, which correlates directly with the thickness of the membrane. Among the longer peptides, the new series showed activities only slightly lower than those of the original KIA peptides of the same length that had a higher charge. Shorter peptides, in which Gly was replaced with Lys, showed activities similar to those of KIA peptides of the same length, but peptides in which Ile was replaced with Lys lost their helicity and were less active.
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Affiliation(s)
- Marie-Claude Gagnon
- Department of Chemistry, PROTEO, CGCC, Université Laval , 1045 avenue de la Médecine, Québec, Canada G1V 0A6.,Department of Chemistry, PROTEO, CERMA, CQMF, Université Laval , 1045 avenue de la Médecine, Québec, Canada G1V 0A6
| | - Erik Strandberg
- Karlsruhe Institute of Technology (KIT) , Institute of Biological Interfaces (IBG-2), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Ariadna Grau-Campistany
- Secció de Química Orgànica, Departament de Química Inorgànica i Orgànica, Facultat de Química, Universitat de Barcelona , Barcelona, Spain
| | - Parvesh Wadhwani
- Karlsruhe Institute of Technology (KIT) , Institute of Biological Interfaces (IBG-2), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Johannes Reichert
- Karlsruhe Institute of Technology (KIT) , Institute of Biological Interfaces (IBG-2), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Jochen Bürck
- Karlsruhe Institute of Technology (KIT) , Institute of Biological Interfaces (IBG-2), P.O. Box 3640, 76021 Karlsruhe, Germany
| | - Francesc Rabanal
- Secció de Química Orgànica, Departament de Química Inorgànica i Orgànica, Facultat de Química, Universitat de Barcelona , Barcelona, Spain
| | - Michèle Auger
- Department of Chemistry, PROTEO, CERMA, CQMF, Université Laval , 1045 avenue de la Médecine, Québec, Canada G1V 0A6
| | - Jean-François Paquin
- Department of Chemistry, PROTEO, CGCC, Université Laval , 1045 avenue de la Médecine, Québec, Canada G1V 0A6
| | - Anne S Ulrich
- Karlsruhe Institute of Technology (KIT) , Institute of Biological Interfaces (IBG-2), P.O. Box 3640, 76021 Karlsruhe, Germany.,KIT , Institute of Organic Chemistry, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany
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196
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Li J, Koh JJ, Liu S, Lakshminarayanan R, Verma CS, Beuerman RW. Membrane Active Antimicrobial Peptides: Translating Mechanistic Insights to Design. Front Neurosci 2017; 11:73. [PMID: 28261050 PMCID: PMC5306396 DOI: 10.3389/fnins.2017.00073] [Citation(s) in RCA: 340] [Impact Index Per Article: 48.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 01/31/2017] [Indexed: 01/10/2023] Open
Abstract
Antimicrobial peptides (AMPs) are promising next generation antibiotics that hold great potential for combating bacterial resistance. AMPs can be both bacteriostatic and bactericidal, induce rapid killing and display a lower propensity to develop resistance than do conventional antibiotics. Despite significant progress in the past 30 years, no peptide antibiotic has reached the clinic yet. Poor understanding of the action mechanisms and lack of rational design principles have been the two major obstacles that have slowed progress. Technological developments are now enabling multidisciplinary approaches including molecular dynamics simulations combined with biophysics and microbiology toward providing valuable insights into the interactions of AMPs with membranes at atomic level. This has led to increasingly robust models of the mechanisms of action of AMPs and has begun to contribute meaningfully toward the discovery of new AMPs. This review discusses the detailed action mechanisms that have been put forward, with detailed atomistic insights into how the AMPs interact with bacterial membranes. The review further discusses how this knowledge is exploited toward developing design principles for novel AMPs. Finally, the current status, associated challenges, and future directions for the development of AMP therapeutics are discussed.
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Affiliation(s)
- Jianguo Li
- Ocular Chemistry and Anti-Infectives, Singapore Eye Research InstituteSingapore, Singapore
- Agency for Science, Technology and Research (ASTAR), Bioinformatics InstituteSingapore, Singapore
- Duke-NUS Graduate Medical School, SRP Neuroscience and BDSingapore, Singapore
| | - Jun-Jie Koh
- Ocular Chemistry and Anti-Infectives, Singapore Eye Research InstituteSingapore, Singapore
| | - Shouping Liu
- Ocular Chemistry and Anti-Infectives, Singapore Eye Research InstituteSingapore, Singapore
| | | | - Chandra S. Verma
- Ocular Chemistry and Anti-Infectives, Singapore Eye Research InstituteSingapore, Singapore
- Agency for Science, Technology and Research (ASTAR), Bioinformatics InstituteSingapore, Singapore
- Department of Biological Sciences, National University of SingaporeSingapore, Singapore
- School of Biological Sciences, Nanyang Technological UniversitySingapore, Singapore
| | - Roger W. Beuerman
- Ocular Chemistry and Anti-Infectives, Singapore Eye Research InstituteSingapore, Singapore
- Duke-NUS Graduate Medical School, SRP Neuroscience and BDSingapore, Singapore
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197
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O'Brien-Simpson NM, Li W, Pantarat N, Hossain MA, Separovic F, Wade JD, Reynolds EC. Fluorescent Ion Efflux Screening Assay for Determining Membrane-Active Peptides. Aust J Chem 2017. [DOI: 10.1071/ch16659] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A major global health threat is the emergence of antibiotic-resistant microbes. Coupled with a lack of development of modified antibiotics, there is a need to develop new antimicrobial molecules and screening assays for them. In this study, we provide proof of concept that a large unilamellar vesicle (LUV) method used to study chloride ion efflux facilitated by ionophores and surfactant-like molecules that disrupt membrane integrity can be adapted to identify membrane-interactive antimicrobial peptides (AMPs) and to screen relative activity of AMPs. Lucigenin was encapsulated in LUVs in the presence of Cl– ion (NaCl), which quenches fluorescence, and then incubated with AMPs in 100 mM NaNO3 buffer. Upon AMP membrane interaction or disruption, the Cl– ion is exchanged with the NO3– ion, and the resultant lucigenin fluorescence is indicative of relative AMP activity. Seven AMPs were synthesized by solid-phase peptide chemistry and incubated with LUVs of different phospholipid compositions. Each AMP resulted in lucigenin fluorescence, which was dose dependent, and the relative fluorescence correlated with the minimum inhibitory concentration and minimum bactericidal concentration values for the corresponding peptide. Furthermore, using mammalian model phospholipid LUVs, lucigenin-induced fluorescence also correlated with the AMP cytotoxicity half-maximal inhibitory concentration values. The proline-rich AMP, Chex1-Arg20, which is non-lytic but interacts with the bacterial membrane resulted in lucigenin fluorescence of bacterial membrane model LUVs but not of mammalian membrane model LUVs. The fluorescent ion efflux assay developed here should have applicability for most AMPs and could be tailored to target particular bacterial species membrane composition, potentially leading to the identification of novel membrane-interactive AMPs. The rapid high-throughput method also allows for screening of relative AMP activity and toxicity before biological testing.
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198
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He SW, Zhang J, Li NQ, Zhou S, Yue B, Zhang M. A TFPI-1 peptide that induces degradation of bacterial nucleic acids, and inhibits bacterial and viral infection in half-smooth tongue sole, Cynoglossus semilaevis. FISH & SHELLFISH IMMUNOLOGY 2017; 60:466-473. [PMID: 27840169 DOI: 10.1016/j.fsi.2016.11.029] [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: 10/06/2016] [Revised: 11/04/2016] [Accepted: 11/09/2016] [Indexed: 06/06/2023]
Abstract
Tissue factor pathway inhibitor 1 (TFPI-1) is a serine protease inhibitor that inhibits tissue factor (TF)-mediated coagulation. The C-terminal region of TFPI-1 could be cleaved off and proved to be antimicrobial against a broad-spectrum of microorganism. In a previous study, a C-terminal peptide, TC24 (with 24 amino acids), derived from tongue sole (Cynoglossus semilaevis) TFPI-1, was synthesized and found antibacterial against Micrococcus luteus. In the present study, the antibacterial spectrum and the action mode of TC24 was further examined, and its in vivo function was analyzed. Our results showed that TC24 also possesses bactericidal activity against Staphylococcus aureus and Vibrio vulnificus. During its interaction with the target bacterial cells, TC24 destroyed cell membrane integrity, penetrated into the cytoplasm, and induced degradation of genomic DNA and total RNA. In vivo study showed that administration of tongue sole with TC24 before bacterial and viral infection significantly reduced pathogen dissemination and replication in tissues. These results indicated that TC24 is a novel antimicrobial peptide against bacterial and viral pathogens, and that the observed effect of TC24 on bacterial RNA adds new insights to the action mechanism of fish antimicrobial peptides. Moreover, TC24 may play an important role in fighting pathogenic infection in aquaculture.
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Affiliation(s)
- Shu-Wen He
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Jian Zhang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Ning-Qiu Li
- Key Laboratory of Fishery Drug Development, Ministry of Agriculture, Key Laboratory of Aquatic Animal Immune Technology, Guangdong Province, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, 510380, China
| | - Shun Zhou
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Bin Yue
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China
| | - Min Zhang
- Marine Science and Engineering College, Qingdao Agricultural University, Qingdao, 266109, China.
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199
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Abstract
Methods are described for the design of amphipathic helical AMPs, to improve potency and/or increase selectivity with respect to host cells. One method is based on the statistical analysis of known helical AMPs to derive a sequence template and ranges of charge, hydrophobicity, and amphipathicity (hydrophobic moment) values that lead to broad-spectrum activity, but leaves optimization for selectivity to subsequent rounds of SAR determinations. A second method uses a small database of anuran AMPs with known potency (MIC values vs. E. coli) and selectivity (HC50 values vs. human erythrocytes), as well as the concept of longitudinal moment, to suggest sequences or sequence variations that can improve selectivity. These methods can assist in the initial design of novel AMPs with useful properties in vitro, but further development requires knowledge-based decisions and a sound prior understanding of how structural and physical attributes of this class of peptides affect their mechanism of action against bacteria and host cells.
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Affiliation(s)
- Davor Juretić
- Mediterranean Institute for Life Sciences, Split, Croatia
| | - Damir Vukičević
- Department of Mathematics, Faculty of Science, University of Split, Split, Croatia
| | - Alessandro Tossi
- Department of Life Sciences, University of Trieste, Via Licio Giorgiere1, 34127, Trieste, Italy.
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Oñate-Garzón J, Manrique-Moreno M, Trier S, Leidy C, Torres R, Patiño E. Antimicrobial activity and interactions of cationic peptides derived from Galleria mellonella cecropin D-like peptide with model membranes. J Antibiot (Tokyo) 2016; 70:238-245. [DOI: 10.1038/ja.2016.134] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 09/07/2016] [Accepted: 10/12/2016] [Indexed: 11/09/2022]
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