51
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Li Z, Teng D, Mao R, Wang X, Hao Y, Wang X, Wang J. Improved Antibacterial Activity of the Marine Peptide N6 against Intracellular Salmonella Typhimurium by Conjugating with the Cell-Penetrating Peptide Tat 11 via a Cleavable Linker. J Med Chem 2018; 61:7991-8000. [PMID: 30095906 DOI: 10.1021/acs.jmedchem.8b01079] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The poor penetration ability of antimicrobial agents limits their use in the treatment of intracellular bacteria. In this study, the conjugate CNC (6) was generated by connecting the cell-penetrating peptide Tat11 (1) and marine peptide N6 (2) via a cathepsin-cleavable linker, and the C-terminal aminated N6 (7) and CNC (8) were first designed and synthesized to eliminate intracellular Salmonellae Typhimurium. The cellular uptake of 6 and stability of 7 were higher than those of 2, and conjugates 6, 8, and 7 had almost no hemolysis and cytotoxicity. The antibacterial activities of 6, 8, and 7 against S. Typhimurium in RAW264.7 cells were increased by 67.2-76.2%, 98.6-98.9%, and 96.3-97.6%, respectively. After treatment with 1-2 μmol/kg of 6, 8, or 7, the survival of the S. Typhimurium-infected mice was 66.7-100%, higher than that of 2 (33.4-66.7%). This result suggested that 6, 8, and 7 may be excellent candidates for novel antimicrobial agents to treat intracellular pathogens.
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Affiliation(s)
- Zhanzhan Li
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture , Beijing 100081 , People's Republic of China.,Gene Engineering Laboratory , Feed Research Institute, Chinese Academy of Agricultural Sciences , Beijing 100081 , People's Republic of China
| | - Da Teng
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture , Beijing 100081 , People's Republic of China.,Gene Engineering Laboratory , Feed Research Institute, Chinese Academy of Agricultural Sciences , Beijing 100081 , People's Republic of China
| | - Ruoyu Mao
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture , Beijing 100081 , People's Republic of China.,Gene Engineering Laboratory , Feed Research Institute, Chinese Academy of Agricultural Sciences , Beijing 100081 , People's Republic of China
| | - Xiao Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture , Beijing 100081 , People's Republic of China.,Gene Engineering Laboratory , Feed Research Institute, Chinese Academy of Agricultural Sciences , Beijing 100081 , People's Republic of China
| | - Ya Hao
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture , Beijing 100081 , People's Republic of China.,Gene Engineering Laboratory , Feed Research Institute, Chinese Academy of Agricultural Sciences , Beijing 100081 , People's Republic of China
| | - Xiumin Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture , Beijing 100081 , People's Republic of China.,Gene Engineering Laboratory , Feed Research Institute, Chinese Academy of Agricultural Sciences , Beijing 100081 , People's Republic of China
| | - Jianhua Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture , Beijing 100081 , People's Republic of China.,Gene Engineering Laboratory , Feed Research Institute, Chinese Academy of Agricultural Sciences , Beijing 100081 , People's Republic of China
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52
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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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53
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Silva Nigenda E, Postma TM, Hezwani M, Pirvan A, Gannon S, Smith CA, Riehle M, Liskamp RMJ. Synthesis and cellular penetration properties of new phosphonium based cationic amphiphilic peptides. MEDCHEMCOMM 2018; 9:982-987. [PMID: 30108987 PMCID: PMC6071932 DOI: 10.1039/c8md00113h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 04/24/2018] [Indexed: 11/21/2022]
Abstract
A new category of phosphonium based cationic amphiphilic peptides has been developed and evaluated as potential antimicrobial peptides and cell penetrating peptides. The required building blocks were conveniently accessible from cysteine and could be applied in a solid phase peptide synthesis protocol for incorporation into peptide sequences. Evaluation of the antimicrobial properties and cellular toxicity of these phosphonium based peptides showed that these "soft" cationic side-chain containing peptides have poor antimicrobial properties and most of them were virtually non toxic (on HEK cells tested at 256 and 512 μM) and non-haemolytic (on horse erythrocytes tested at 512 μM), hinting at an interesting potential application as cell penetrating peptides. This possibility was evaluated using fluorescent peptide derivatives and showed that these phosphonium based peptide derivatives were capable of entering HEK cells and depending on the sequence confined to specific cellular areas.
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Affiliation(s)
- Ezequiel Silva Nigenda
- School of Chemistry , University of Glasgow , Joseph Black Building, University Avenue , Glasgow G12 8QQ , UK .
| | - Tobias M Postma
- School of Chemistry , University of Glasgow , Joseph Black Building, University Avenue , Glasgow G12 8QQ , UK .
| | - Mohammed Hezwani
- School of Chemistry , University of Glasgow , Joseph Black Building, University Avenue , Glasgow G12 8QQ , UK .
| | - Alin Pirvan
- School of Chemistry , University of Glasgow , Joseph Black Building, University Avenue , Glasgow G12 8QQ , UK .
| | - Susan Gannon
- School of Chemistry , University of Glasgow , Joseph Black Building, University Avenue , Glasgow G12 8QQ , UK .
| | - Carol-Anne Smith
- Centre for Cell Engineering , Institute of Molecular, Cell and Systems Biology , Joseph Black Building, University Avenue , Glasgow G12 8QQ , UK
| | - Mathis Riehle
- Centre for Cell Engineering , Institute of Molecular, Cell and Systems Biology , Joseph Black Building, University Avenue , Glasgow G12 8QQ , UK
| | - Rob M J Liskamp
- School of Chemistry , University of Glasgow , Joseph Black Building, University Avenue , Glasgow G12 8QQ , UK .
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54
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Cheng KT, Wu CL, Yip BS, Yu HY, Cheng HT, Chih YH, Cheng JW. High Level Expression and Purification of the Clinically Active Antimicrobial Peptide P-113 in Escherichia coli. Molecules 2018; 23:molecules23040800. [PMID: 29601518 PMCID: PMC6017664 DOI: 10.3390/molecules23040800] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 03/03/2018] [Accepted: 03/20/2018] [Indexed: 12/18/2022] Open
Abstract
P-113, which was originally derived from the human saliva protein histatin 5, is a histidine-rich antimicrobial peptide with the sequence AKRHHGYKRKFH. P-113 is currently undergoing phase II clinical trial as a pharmaceutical agent to fight against fungal infections in HIV patients with oral candidiasis. Previously, we developed a new procedure for the high-yield expression and purification of hG31P, an analogue and antagonist of human CXCL8. Moreover, we have successfully removed lipopolysaccharide (LPS, endotoxin) associated with hG31P in the expression with Escherichia coli. In this paper, we have used hG31P as a novel fusion protein for the expression and purification of P-113. The purity of the expressed P-113 is more than 95% and the yield is 4 mg P-113 per liter of E. coli cell culture in Luria-Bertani (LB) medium. The antimicrobial activity of the purified P-113 was tested. Furthermore, we used circular dichroism (CD) and nuclear magnetic resonance (NMR) spectroscopy to study the structural properties of P-113. Our results indicate that using hG31P as a fusion protein to obtain large quantities of P-113 is feasible and is easy to scale up for commercial production. An effective way of producing enough P-113 for future clinical studies is evident in this study.
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Affiliation(s)
- Kuang-Ting Cheng
- Institute of Biotechnology and Department of Medical Science, National Tsing Hua University, Hsinchu 300, Taiwan.
| | - Chih-Lung Wu
- Institute of Biotechnology and Department of Medical Science, National Tsing Hua University, Hsinchu 300, Taiwan.
| | - Bak-Sau Yip
- Institute of Biotechnology and Department of Medical Science, National Tsing Hua University, Hsinchu 300, Taiwan.
- Department of Neurology, National Taiwan University Hospital, Hsinchu 300, Taiwan.
| | - Hui-Yuan Yu
- Institute of Biotechnology and Department of Medical Science, National Tsing Hua University, Hsinchu 300, Taiwan.
| | - Hsi-Tsung Cheng
- Institute of Biotechnology and Department of Medical Science, National Tsing Hua University, Hsinchu 300, Taiwan.
| | - Ya-Han Chih
- Institute of Biotechnology and Department of Medical Science, National Tsing Hua University, Hsinchu 300, Taiwan.
| | - Jya-Wei Cheng
- Institute of Biotechnology and Department of Medical Science, National Tsing Hua University, Hsinchu 300, Taiwan.
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55
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Kumar P, Kizhakkedathu JN, Straus SK. Antimicrobial Peptides: Diversity, Mechanism of Action and Strategies to Improve the Activity and Biocompatibility In Vivo. Biomolecules 2018; 8:E4. [PMID: 29351202 PMCID: PMC5871973 DOI: 10.3390/biom8010004] [Citation(s) in RCA: 632] [Impact Index Per Article: 105.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 01/12/2018] [Accepted: 01/12/2018] [Indexed: 02/06/2023] Open
Abstract
Antibiotic resistance is projected as one of the greatest threats to human health in the future and hence alternatives are being explored to combat resistance. Antimicrobial peptides (AMPs) have shown great promise, because use of AMPs leads bacteria to develop no or low resistance. In this review, we discuss the diversity, history and the various mechanisms of action of AMPs. Although many AMPs have reached clinical trials, to date not many have been approved by the US Food and Drug Administration (FDA) due to issues with toxicity, protease cleavage and short half-life. Some of the recent strategies developed to improve the activity and biocompatibility of AMPs, such as chemical modifications and the use of delivery systems, are also reviewed in this article.
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Affiliation(s)
- Prashant Kumar
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada.
- Centre for Blood Research, Department of Pathology and Laboratory Medicine, University of British Columbia, 2350 Health Sciences Mall, Life Sciences Centre, Vancouver, BC V6T 1Z3, Canada.
| | - Jayachandran N Kizhakkedathu
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada.
- Centre for Blood Research, Department of Pathology and Laboratory Medicine, University of British Columbia, 2350 Health Sciences Mall, Life Sciences Centre, Vancouver, BC V6T 1Z3, Canada.
| | - Suzana K Straus
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada.
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56
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Gomes B, Augusto MT, Felício MR, Hollmann A, Franco OL, Gonçalves S, Santos NC. Designing improved active peptides for therapeutic approaches against infectious diseases. Biotechnol Adv 2018; 36:415-429. [PMID: 29330093 DOI: 10.1016/j.biotechadv.2018.01.004] [Citation(s) in RCA: 100] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 12/13/2017] [Accepted: 01/06/2018] [Indexed: 12/25/2022]
Abstract
Infectious diseases are one of the main causes of human morbidity and mortality. In the last few decades, pathogenic microorganisms' resistance to conventional drugs has been increasing, and it is now pinpointed as a major worldwide health concern. The need to search for new therapeutic options, as well as improved treatment outcomes, has therefore increased significantly, with biologically active peptides representing a new alternative. A substantial research effort is being dedicated towards their development, especially due to improved biocompatibility and target selectivity. However, the inherent limitations of peptide drugs are restricting their application. In this review, we summarize the current status of peptide drug development, focusing on antiviral and antimicrobial peptide activities, highlighting the design improvements needed, and those already being used, to overcome the drawbacks of the therapeutic application of biologically active peptides.
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Affiliation(s)
- Bárbara Gomes
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, 1649-028 Lisboa, Portugal
| | - Marcelo T Augusto
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, 1649-028 Lisboa, Portugal
| | - Mário R Felício
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, 1649-028 Lisboa, Portugal
| | - Axel Hollmann
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, 1649-028 Lisboa, Portugal; Laboratory of Molecular Microbiology, Institute of Basic and Applied Microbiology, National University of Quilmes, Bernal, Buenos Aires, Argentina; Laboratory of Biointerfaces and Biomimetic Systems, CITSE, National University of Santiago del Estero-CONICET, Santiago del Estero, Argentina
| | - Octávio L Franco
- Centro de Análises Proteômicas e Bioquímicas, Pós-graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, DF, Brazil; Programa de Pós-Graduação em Patologia Molecular, Universidade de Brasília, Brasília, DF, Brazil; S-Inova Biotech, Pós-graduação em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, MS, Brazil
| | - Sónia Gonçalves
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, 1649-028 Lisboa, Portugal
| | - Nuno C Santos
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Avenida Professor Egas Moniz, 1649-028 Lisboa, Portugal.
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57
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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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58
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High-Throughput Identification of Antimicrobial Peptides from Amphibious Mudskippers. Mar Drugs 2017; 15:md15110364. [PMID: 29165344 PMCID: PMC5706053 DOI: 10.3390/md15110364] [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: 10/26/2017] [Revised: 11/12/2017] [Accepted: 11/15/2017] [Indexed: 12/24/2022] Open
Abstract
Widespread existence of antimicrobial peptides (AMPs) has been reported in various animals with comprehensive biological activities, which is consistent with the important roles of AMPs as the first line of host defense system. However, no big-data-based analysis on AMPs from any fish species is available. In this study, we identified 507 AMP transcripts on the basis of our previously reported genomes and transcriptomes of two representative amphibious mudskippers, Boleophthalmus pectinirostris (BP) and Periophthalmus magnuspinnatus (PM). The former is predominantly aquatic with less time out of water, while the latter is primarily terrestrial with extended periods of time on land. Within these identified AMPs, 449 sequences are novel; 15 were reported in BP previously; 48 are identically overlapped between BP and PM; 94 were validated by mass spectrometry. Moreover, most AMPs presented differential tissue transcription patterns in the two mudskippers. Interestingly, we discovered two AMPs, hemoglobin β1 and amylin, with high inhibitions on Micrococcus luteus. In conclusion, our high-throughput screening strategy based on genomic and transcriptomic data opens an efficient pathway to discover new antimicrobial peptides for ongoing development of marine drugs.
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59
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Deslouches B, Di YP. Antimicrobial Peptides: A Potential Therapeutic Option for Surgical Site Infections. CLINICS IN SURGERY 2017; 2:1740. [PMID: 30135956 PMCID: PMC6101250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Surgical Site Infections (SSI) represents one of the most common hospital-associated infections worldwide, and many cases of SSI are due to multidrug-resistant bacteria with the propensity to attach to tissues and form biofilm on post-surgical sites. While systemic antibiotic treatment (prophylactically and therapeutically) is usually effective, SSI can be difficult to treat when associated with drug resistance. Antimicrobial Peptides (AMPs) are an untapped resource that could serve as an effective therapeutic option, as they display broad-spectrum antimicrobial activity regardless of antibiotic resistance. In the last decade, it has become increasingly clear that AMPs also display antibiofilm properties. We reviewed herein the potential of AMPs as promising therapeutics for SSI and the need for structural optimization to develop AMPs for clinical applications.
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Affiliation(s)
- Berthony Deslouches
- Department of Environmental and Occupational Health, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, USA,Department of Microbiology and Molecular Genetics, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Y Peter Di
- Department of Environmental and Occupational Health, University of Pittsburgh Graduate School of Public Health, Pittsburgh, PA, USA,Correspondence: Y Peter Di, Department of Environmental and Occupational Health, 100 Technology Drive, Bridgeside Point I, Room 331, Pittsburgh, PA 15206, USA, Tel: (412) 624-8718;
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60
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Yoon IN, Lu LF, Hong J, Zhang P, Kim DH, Kang JK, Hwang JS, Kim H. The American cockroach peptide periplanetasin-4 inhibits Clostridium difficile toxin A-induced cell toxicities and inflammatory responses in the mouse gut. J Pept Sci 2017; 23:833-839. [PMID: 28949065 DOI: 10.1002/psc.3046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 07/27/2017] [Accepted: 08/27/2017] [Indexed: 01/07/2023]
Abstract
Many reports have shown that crude extracts of the American cockroach have therapeutic effects on inflammation. In a previous study, our research group showed that an antimicrobial peptide (Periplanetasin-2) derived from the American cockroach via de novo transcriptome analysis inhibited apoptosis of human colonocytes and inflammatory responses of the mouse gut caused by Clostridium difficile toxin A. Here, we examined whether Periplanetasin-4 (Peri-4), another antimicrobial peptide identified via de novo transcriptome analysis of the American cockroach, could also inhibit the various toxicities induced by C. difficile toxin A. We found that Peri-4 significantly reduced the cell viability loss and cell apoptosis caused by toxin A in vitro. Peri-4 also ameliorated the severe inflammatory responses seen in the toxin A-induced mouse enteritis model, rescuing the villus disruption and interleukin-6 production induced by luminal injection of toxin A into the mouse gut. Mechanistically, we found that Peri-4 could reduce toxin A-induced reactive oxygen species production to inhibit the activations of p38MAPK and p21Cip1/Waf1 , which are critical for the cell damages induced by toxin A. These results collectively suggest that the Peri-4 may be a potential therapeutic agent for treating toxin A-induced pseudomembranous colitis. Copyright © 2017 European Peptide Society and John Wiley & Sons, Ltd.
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Affiliation(s)
- I Na Yoon
- Division of Life Science and Chemistry, College of Natural Science, Daejin University, Pocheon, Gyeonggido, 11159, Korea
| | - Li Fang Lu
- Hainan Institute of Science and Technology, Haikou, 571126, China
| | - Ji Hong
- Division of Life Science and Chemistry, College of Natural Science, Daejin University, Pocheon, Gyeonggido, 11159, Korea
| | - Peng Zhang
- Division of Life Science and Chemistry, College of Natural Science, Daejin University, Pocheon, Gyeonggido, 11159, Korea
| | - Dae Hong Kim
- Division of Life Science and Chemistry, College of Natural Science, Daejin University, Pocheon, Gyeonggido, 11159, Korea
| | - Jin Ku Kang
- Lee Gil Ya Cancer and Diabetes Institute, Gachon University Graduate School of Medicine, Incheon, 406-840, Korea
| | - Jae Sam Hwang
- Department of Agricultural Biology, National Academy of Agricultural Science, RDA, Wanju, 55365, Korea
| | - Ho Kim
- Division of Life Science and Chemistry, College of Natural Science, Daejin University, Pocheon, Gyeonggido, 11159, Korea
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61
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Discovery of Phylloseptins that Defense against Gram-Positive Bacteria and Inhibit the Proliferation of the Non-Small Cell Lung Cancer Cell Line, from the Skin Secretions of Phyllomedusa Frogs. Molecules 2017; 22:molecules22091428. [PMID: 28850103 PMCID: PMC6151776 DOI: 10.3390/molecules22091428] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 08/26/2017] [Indexed: 11/22/2022] Open
Abstract
The growing occurrence of bacterial resistance to conventional antibiotics has called for the development of new classes of antimicrobial agents. Antimicrobial peptides (AMPs) with broad antimicrobial spectrum derived from frog skin secretions have been demonstrated to be promising candidates for new antibiotic development. A proven rich source of these compounds are the skin secretions of the frogs in the Phyllomedusa genus. In this study, two novel phylloseptin peptides—phylloseptin-PTa and phylloseptin-PHa—were isolated from the skin secretions of the South American frogs, Phyllomedusa tarsius (P. tarsius) and Phyllomedusa hypochondrialis (P. hypochondrialis) through parallel transcriptomic and peptidomic studies. Replicates obtained by chemical synthesis were structurally analysed and shown to adopt an α-helix configuration in an amphiphilic environment. Both peptides demonstrated antimicrobial activities against planktonic Gram-positive bacteria strains, including Staphylococcus aureus, Enterococcus faecalis and methicillin-resistant Staphylococcus aureus , biofilms, as well as cytostatic effects on the non-small cell lung cancer cell line, NCI-H157, with relatively low haemolysis on horse erythrocytes and low cytotoxicity on the human microvascular endothelial cell line, HMEC-1. The discovery of phylloseptin peptides may further inspire the development of new types of antibiotics.
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62
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Nešuta O, Buděšínský M, Hadravová R, Monincová L, Humpoličková J, Čeřovský V. How proteases from Enterococcus faecalis contribute to its resistance to short α-helical antimicrobial peptides. Pathog Dis 2017; 75:4056144. [DOI: 10.1093/femspd/ftx091] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 07/27/2017] [Indexed: 11/13/2022] Open
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63
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Gabernet G, Müller AT, Hiss JA, Schneider G. Membranolytic anticancer peptides. MEDCHEMCOMM 2016. [DOI: 10.1039/c6md00376a] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Understanding the structure–activity relationships and mechanisms of action of membranolytic anticancer peptides could help them advance to therapeutic success.
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Affiliation(s)
- G. Gabernet
- Department of Chemistry and Applied Biosciences
- Swiss Federal Institute of Technology (ETH)
- CH-8093 Zurich
- Switzerland
| | - A. T. Müller
- Department of Chemistry and Applied Biosciences
- Swiss Federal Institute of Technology (ETH)
- CH-8093 Zurich
- Switzerland
| | - J. A. Hiss
- Department of Chemistry and Applied Biosciences
- Swiss Federal Institute of Technology (ETH)
- CH-8093 Zurich
- Switzerland
| | - G. Schneider
- Department of Chemistry and Applied Biosciences
- Swiss Federal Institute of Technology (ETH)
- CH-8093 Zurich
- Switzerland
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