1
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Li M, Sun X, Zhao L, Du W, Shang D. The antibacterial activity and mechanisms of Trp-containing peptides against multidrug-resistant Pseudomonas aeruginosa persisters. Biochimie 2024; 225:133-145. [PMID: 38815647 DOI: 10.1016/j.biochi.2024.05.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Revised: 04/27/2024] [Accepted: 05/22/2024] [Indexed: 06/01/2024]
Abstract
Bacterial persisters avoid antibiotic-mediated death by entering a dormant state and are considered a major cause of antibiotic treatment failure. Antimicrobial peptides (AMPs) with membrane-disrupting activity are promising drugs to eradicate persister cells. In this study, carbonyl cyanide m-chlorophenylhydrazone (CCCP), ciprofloxacin (CIP), and rifampicin (RFP) were applied to induce the formation of multidrug-resistant Pseudomonas aeruginosa (MRPA0108) persisters, and the antibacterial activity and mechanisms of I1W and L12W (two Trp-containing peptides designed in our lab) against MRPA0108 persisters were investigated. The results showed that I1W and L12W displayed potent antibacterial activity against MRPA0108 persisters. Both Trp-containing peptides disturbed the inner and outer membrane of MRPA0108 persisters. In addition, I1W and L12W revealed novel antibacterial mechanisms by decreasing the enzymatic activities of superoxide dismutase (SOD) and catalase (CAT), increasing reactive oxygen species (ROS) and malondialdehyde (MDA) levels, consequently leading to oxidative stress. The transcriptome profile of I1W-treated MRPA0108 persisters revealed that the genes involved in carbon metabolism, biosynthesis of amino acids, and the TCA cycle were downregulated, indicating that I1W interfered with metabolism and energy synthesis processes. Furthermore, both Trp-containing peptides displayed synergistic activities with antibiotic tobramycin and showed additive activities with cefepime or ciprofloxacin, which revealed a potential therapeutic strategy for the eradication of MRPA0108 persisters.
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Affiliation(s)
- Mengmiao Li
- School of Life Sciences, Liaoning Normal University, Dalian, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian, China
| | - Xiaomi Sun
- School of Life Sciences, Liaoning Normal University, Dalian, China
| | - Lei Zhao
- School of Life Sciences, Liaoning Normal University, Dalian, China
| | - Wanying Du
- School of Life Sciences, Liaoning Normal University, Dalian, China
| | - Dejing Shang
- School of Life Sciences, Liaoning Normal University, Dalian, China; Liaoning Provincial Key Laboratory of Biotechnology and Drug Discovery, Liaoning Normal University, Dalian, China.
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2
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Wang X, Feng L, Li M, Dong W, Luo X, Shang D. Membrane-active and DNA binding related double-action antimycobacterial mechanism of antimicrobial peptide W3R6 and its synthetic analogs. Biochim Biophys Acta Gen Subj 2023:130415. [PMID: 37336295 DOI: 10.1016/j.bbagen.2023.130415] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 06/13/2023] [Accepted: 06/15/2023] [Indexed: 06/21/2023]
Abstract
The emergence of multidrug- or extremely drug-resistant M. tuberculosis strains has made very few drugs available for current tuberculosis treatment. Antimicrobial peptides can be employed as a promising alternative strategy for TB treatment. Here, we designed and synthesized a series of peptide sequences based on the structure-activity relationships of natural sequences of antimicrobial peptides. The peptide W3R6 and its analogs were screened and found to have potent antimycobacterial activity against M. smegmatis, and no hemolytic activity against human erythrocytes. The evidence from the mechanism of action study indicated that W3R6 and its analogs can interact with the mycobacterial membrane in a lytic manner and form pores on the outer membrane of M. smegmatis. Significant colocalization of D-W3R6 with mycobacterial DNA was observed by confocal laser scanning microscopy and DNA retardation assays, which suggested that the antimycobacterial mechanism of action of the peptide was associated with the unprotected genomic DNA of M. smegmatis. In general, W3R6 and its analogs act on not only the mycobacterial membrane but also the genomic DNA in the cytoplasm, which makes it difficult for mycobacteria to generate resistance due to the peptides having two targets. In addition, the peptides can effectively eliminate M. smegmatis cells from infected macrophages. Our findings indicated that the antimicrobial peptide W3R6 could be a novel lead compound to overcome the threat from drug-resistant M. tuberculosis strains in the development of potent AMPs for TB therapeutic applications.
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Affiliation(s)
- Xiaorui Wang
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Liubin Feng
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Mengmiao Li
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Weibing Dong
- 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.
| | - Xueyue Luo
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - 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.
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3
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Lyu Y, Tan M, Xue M, Hou W, Yang C, Shan A, Xiang W, Cheng B. Broad-spectrum hybrid antimicrobial peptides derived from PMAP-23 with potential LPS binding ability. Biochem Pharmacol 2023; 210:115500. [PMID: 36921633 DOI: 10.1016/j.bcp.2023.115500] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 02/21/2023] [Accepted: 03/07/2023] [Indexed: 03/16/2023]
Abstract
Antimicrobial peptides, as an integral part of the innate immune system, kill bacteria through a special mechanism of action, making them less susceptible to drug resistance. However, Lipopolysaccharide (LPS) as the permeation barrier on the bacterial membrane, inhibits the antibacterial activity of antimicrobial peptides and triggers the inflammatory response. GWKRKRFG is an LPS binding sequence with a β-boomerang motif that can be linked to antimicrobial peptides to enhance their LPS affinity and reduce the possibility of LPS-induced inflammatory responses. In this study, a series of hybrid peptides were designed by conjugating the reported LPS binding sequence to the C-/N-terminal sequences of the natural porcine antimicrobial peptide PMAP-23 to increase the LPS affinity of peptides. Among all the designed hybrid peptides, 4R-PP-G8 showed the best antibacterial activity, nonhemolytic activity, and excellent cell selectivity. The presence of LPS not only induced the secondary structure transformation of 4R-PP-G8 from a random structure to an α-helical structure but also reduced the antibacterial activity of 4R-PP-G8 in a dose-dependent manner, indicating the excellent binding ability of 4R-PP-G8 to LPS. The LPS/LTA binding assay further verified the interaction between the peptide and LPS. The membrane permeability test verified that 4R-PP-G8 possessed a strong capability to penetrate the bacterial membrane after interacting with LPS. More direct membrane disruption was observed under FE-SEM and TEM. In conclusion, we provided a simple and efficient method to improve the LPS binding ability of antimicrobial peptides and enhance their antimicrobial activity, resulting in the peptide 4R-PP-G8 with clinical application potential.
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Affiliation(s)
- Yinfeng Lyu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Meishu Tan
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Meng Xue
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Wenjing Hou
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Chengyi Yang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Anshan Shan
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China.
| | - Wensheng Xiang
- School of Life Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Baojing Cheng
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
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4
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An Overview of Biofilm Formation-Combating Strategies and Mechanisms of Action of Antibiofilm Agents. LIFE (BASEL, SWITZERLAND) 2022; 12:life12081110. [PMID: 35892912 PMCID: PMC9394423 DOI: 10.3390/life12081110] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 07/19/2022] [Accepted: 07/20/2022] [Indexed: 11/19/2022]
Abstract
Biofilm formation on surfaces via microbial colonization causes infections and has become a major health issue globally. The biofilm lifestyle provides resistance to environmental stresses and antimicrobial therapies. Biofilms can cause several chronic conditions, and effective treatment has become a challenge due to increased antimicrobial resistance. Antibiotics available for treating biofilm-associated infections are generally not very effective and require high doses that may cause toxicity in the host. Therefore, it is essential to study and develop efficient anti-biofilm strategies that can significantly reduce the rate of biofilm-associated healthcare problems. In this context, some effective combating strategies with potential anti-biofilm agents, including plant extracts, peptides, enzymes, lantibiotics, chelating agents, biosurfactants, polysaccharides, organic, inorganic, and metal nanoparticles, etc., have been reviewed to overcome biofilm-associated healthcare problems. From their extensive literature survey, it can be concluded that these molecules with considerable structural alterations might be applied to the treatment of biofilm-associated infections, by evaluating their significant delivery to the target site of the host. To design effective anti-biofilm molecules, it must be assured that the minimum inhibitory concentrations of these anti-biofilm compounds can eradicate biofilm-associated infections without causing toxic effects at a significant rate.
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5
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Xing J, Fang Y, Zhang W, Zhang H, Tang D, Wang D. Bacterial driver-passenger model in biofilms: a new mechanism in the development of colorectal cancer. Clin Transl Oncol 2022; 24:784-795. [PMID: 35000132 DOI: 10.1007/s12094-021-02738-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 11/10/2021] [Indexed: 02/07/2023]
Abstract
Colorectal cancer (CRC) is a heterogeneous disease of the intestinal epithelium and ranks the third largest diagnosed malignancy in the world. Many studies have shown that the high risk of CRC is believed to be related to the formation of biofilms. To prove causation, it will be significant to decipher which specific bacteria in biofilms initiate and maintain CRC and fully describe their underlying mechanisms. Here we introduce a bacterial driver-passenger model. This model added a novel and compelling angle to the role of microorganisms, putting more emphasis on the transformation of bacterial composition in biofilms which play different roles in the development of CRC. In this model, bacterial drivers can initiate the formation of CRC through genotoxicity, while bacterial passengers maintain the CRC process through metabolites. On the basis of these pathogens, we further turned our attention to strategies that can inhibit and eradicate these pathogenic biofilms, with the aim of finding new ways to hinder colorectal carcinogenesis.
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Affiliation(s)
- J Xing
- Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu Province, People's Republic of China
| | - Y Fang
- Department of Clinical Medical College, Dalian Medical University, Dalian, Liaoning, People's Republic of China
| | - W Zhang
- Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu Province, People's Republic of China
| | - H Zhang
- Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu Province, People's Republic of China
| | - D Tang
- Department of General Surgery, Institute of General Surgery, Clinical Medical College, Northern Jiangsu Province Hospital, Yangzhou University, Yangzhou, 225001, People's Republic of China.
| | - D Wang
- Department of General Surgery, Institute of General Surgery, Clinical Medical College, Northern Jiangsu Province Hospital, Yangzhou University, Yangzhou, 225001, People's Republic of China
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6
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Lai Z, Yuan X, Chen H, Zhu Y, Dong N, Shan A. Strategies employed in the design of antimicrobial peptides with enhanced proteolytic stability. Biotechnol Adv 2022; 59:107962. [PMID: 35452776 DOI: 10.1016/j.biotechadv.2022.107962] [Citation(s) in RCA: 52] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 03/14/2022] [Accepted: 04/13/2022] [Indexed: 12/12/2022]
Abstract
Due to the alarming developing rate of multidrug-resistant bacterial pathogens, the development and modification of antimicrobial peptides (AMPs) are unprecedentedly active. Despite the fact that considerable efforts have been expended on the discovery and design strategies of AMPs, the clinical translation of peptide antibiotics remains inadequate. A large number of articles and reviews credited the limited success of AMPs to their poor stability in the biological environment, particularly their poor proteolytic stability. In the past forty years, various design strategies have been used to improve the proteolytic stability of AMPs, such as sequence modification, cyclization, peptidomimetics, and nanotechnology. Herein, we focus our discussion on the progress made in improving the proteolytic stability of AMPs and the principle, successes, and limitations of various anti-proteolytic design strategies. It is of prospective significance to extend current insights into the degradation-related inactivation of AMPs and also alleviate/overcome the problem.
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Affiliation(s)
- Zhenheng Lai
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China
| | - Xiaojie Yuan
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China
| | - Hongyu Chen
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China
| | - Yunhui Zhu
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China
| | - Na Dong
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China
| | - Anshan Shan
- Institute of Animal Nutrition, Northeast Agricultural University, Harbin 150030, China.
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7
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Bhat RAH, Khangembam VC, Thakuria D, Pant V, Tandel RS, Tripathi G, Sarma D. Antimicrobial Activity of an Artificially Designed Peptide Against Fish Pathogens. Microbiol Res 2022; 260:127039. [DOI: 10.1016/j.micres.2022.127039] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 04/02/2022] [Accepted: 04/08/2022] [Indexed: 12/28/2022]
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Abstract
Antimicrobial peptides (AMPs) have recently become widely publicized because they have the potential to function in alternative therapies as “natural” antibiotics, with their main advantage being a broad spectrum of activity. The potential for antimicrobial peptides to treat diabetes mellitus (DM) has been reported. In diabetes mellitus type I (T1D), cathelicidin-related antimicrobial peptide (CRAMP), cathelicidin antimicrobial peptide (CAMP) and mouse-β- defensin 14 (mBD14) are positively affected. Decreased levels of LL-37 and human neutrophil peptide 1-3 (HNP1-3) have been reported in diabetes mellitus type II (T2D) relative to healthy patients. Moreover, AMPs from amphibians and social wasps have antidiabetic effects. In infections occurring in patients with tuberculosis-diabetes or diabetic foot, granulysin, HNP1, HNP2, HNP3, human beta-defensin 2 (HBD2), and cathelicidins are responsible for pathogen clearance. An interesting alternative is also the use of modified M13 bacteriophages containing encapsulated AMPs genes or phagemids.
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9
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Mbuayama KR, Taute H, Strӧmstedt AA, Bester MJ, Gaspar ARM. Antifungal activity and mode of action of synthetic peptides derived from the tick OsDef2 defensin. J Pept Sci 2021; 28:e3383. [PMID: 34866278 DOI: 10.1002/psc.3383] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 10/28/2021] [Accepted: 11/08/2021] [Indexed: 01/29/2023]
Abstract
Candida albicans is the principal opportunistic fungal pathogen in nosocomial settings and resistance to antifungal drugs is on the rise. Antimicrobial peptides from natural sources are promising novel therapeutics against C. albicans. OsDef2 defensin was previously found to be active against only Gram-positive bacteria, whereas derived fragments Os and its cysteine-free analogue, Os-C, are active against Gram-positive and Gram-negative bacteria at low micromolar concentrations. In this study, OsDef2-derived analogues and fragments were screened for anticandidal activity with the aim to identify peptides with antifungal activity and in so doing obtain a better understanding of the structural requirements for activity and modes of action. Os, Os-C and Os(11-22)NH2 , a Os-truncated carboxy-terminal-amidated fragment, had the most significant antifungal activities, with minimum fungicidal concentrations (MFCs) in the micromolar range (6-28 μM). C. albicans killing was rapid and occurred within 30-60 min. Further investigations showed all three peptides interacted with cell wall derived polysaccharides while both Os and Os(11-22)NH2 permeabilized fungal liposomes. Confocal laser scanning microscopy confirmed that Os-C and Os(11-22)NH2 could enter the cytosol of live cells and subsequent findings suggest that the uptake of Os and Os-C, in contrast to Os(11-22)NH2 , is energy dependent. Although Os, Os-C and Os(11-22)NH2 induced the production of reactive oxygen species (ROS), co-incubation with ascorbic acid revealed that only ROS generated by Os-C and to a lesser extent Os(11-22)NH2 resulted in cell death. Overall, Os, Os-C and Os(11-22)NH2 are promising candidacidal agents.
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Affiliation(s)
- Kabuzi R Mbuayama
- Department of Biochemistry, Genetics and Microbiology, Faculty of Natural and Agricultural Sciences, University of Pretoria, Pretoria, South Africa
| | - Helena Taute
- Department of Anatomy, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Adam A Strӧmstedt
- Pharmacognosy, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Megan J Bester
- Department of Anatomy, Faculty of Health Sciences, University of Pretoria, Pretoria, South Africa
| | - Anabella R M Gaspar
- Department of Biochemistry, Genetics and Microbiology, Faculty of Natural and Agricultural Sciences, University of Pretoria, Pretoria, South Africa
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10
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Hong MJ, Kim MK, Park Y. Comparative Antimicrobial Activity of Hp404 Peptide and Its Analogs against Acinetobacter baumannii. Int J Mol Sci 2021; 22:ijms22115540. [PMID: 34073939 PMCID: PMC8197367 DOI: 10.3390/ijms22115540] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/07/2021] [Accepted: 05/19/2021] [Indexed: 12/24/2022] Open
Abstract
An amphipathic α-helical peptide, Hp1404, was isolated from the venomous gland of the scorpion Heterometrus petersii. Hp1404 exhibits antimicrobial activity against methicillin-resistant Staphylococcus aureus but is cytotoxic. In this study, we designed antimicrobial peptides by substituting amino acids at the 14 C-terminal residues of Hp1404 to reduce toxicity and improve antibacterial activity. The analog peptides, which had an amphipathic α-helical structure, were active against gram-positive and gram-negative bacteria, particularly multidrug-resistant Acinetobacter baumannii, and showed lower cytotoxicity than Hp1404. N-phenyl-1-naphthylamine uptake and DisC3-5 assays demonstrated that the peptides kill bacteria by effectively permeating the outer and cytoplasmic membranes. Additionally, the analog peptides inhibited biofilm formation largely than Hp1404 at low concentrations. These results suggest that the analog peptides of Hp1404 can be used as therapeutic agents against A. baumannii infection.
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Affiliation(s)
- Min Ji Hong
- Department of Biomedical Sciences, Chosun University, Gwangju 61452, Korea; (M.J.H.); (M.K.K.)
| | - Min Kyung Kim
- Department of Biomedical Sciences, Chosun University, Gwangju 61452, Korea; (M.J.H.); (M.K.K.)
| | - Yoonkyung Park
- Department of Biomedical Sciences, Chosun University, Gwangju 61452, Korea; (M.J.H.); (M.K.K.)
- Research Center for Proteineous Materials, Chosun University, Gwangju 61452, Korea
- Correspondence: ; Tel.: +82-62-230-6854; Fax: +82-62-225-6758
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11
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Shi S, Shen T, Liu Y, Chen L, Wang C, Liao C. Porcine Myeloid Antimicrobial Peptides: A Review of the Activity and Latest Advances. Front Vet Sci 2021; 8:664139. [PMID: 34055951 PMCID: PMC8160099 DOI: 10.3389/fvets.2021.664139] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 04/19/2021] [Indexed: 11/23/2022] Open
Abstract
Traditional antibiotics have made great contributions to human health and animal husbandry since the discovery of penicillin in 1928, but bacterial resistance and drug residues are growing threats to global public health due to the long-term uncontrolled application of antibiotics. There is a critical need to develop new antimicrobial drugs to replace antibiotics. Antimicrobial peptides (AMPs) are distributed in all kingdoms of life, presenting activity against pathogens as well as anticancer, anti-inflammatory, and immunomodulatory activities; consequently, they have prospects as new potential alternatives to antibiotics. Porcine myeloid antimicrobial peptides (PMAPs), the porcine cathelicidin family of AMPs, have been reported in the literature in recent years. PMAPs have become an important research topic due to their strong antibacterial activity. This review focuses on the universal trends in the biochemical parameters, structural characteristics and biological activities of PMAPs.
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Affiliation(s)
- Shuaibing Shi
- The Key Lab of Veterinary Biological Products, Henan University of Science and Technology, Luoyang, China
| | - Tengfei Shen
- The Key Lab of Veterinary Biological Products, Henan University of Science and Technology, Luoyang, China
| | - Yongqing Liu
- The Key Lab of Veterinary Biological Products, Henan University of Science and Technology, Luoyang, China
| | - Liangliang Chen
- The Key Lab of Veterinary Biological Products, Henan University of Science and Technology, Luoyang, China
| | - Chen Wang
- The Key Lab of Veterinary Biological Products, Henan University of Science and Technology, Luoyang, China
| | - Chengshui Liao
- The Key Lab of Veterinary Biological Products, Henan University of Science and Technology, Luoyang, China.,College of Animal Science and Technology/Luoyang Key Laboratory of Live Carrier Biomaterial and Animal Disease Prevention and Control, Henan University of Science and Technology, Luoyang, China
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12
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Han H, Teng D, Mao R, Hao Y, Yang N, Wang Z, Li T, Wang X, Wang J. Marine Peptide-N6NH2 and Its Derivative-GUON6NH2 Have Potent Antimicrobial Activity Against Intracellular Edwardsiella tarda in vitro and in vivo. Front Microbiol 2021; 12:637427. [PMID: 33767681 PMCID: PMC7985170 DOI: 10.3389/fmicb.2021.637427] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 02/10/2021] [Indexed: 12/03/2022] Open
Abstract
Edwardsiella tarda is a facultative intracellular pathogen in humans and animals. There is no effective way except vaccine candidates to eradicate intracellular E. tarda. In this study, four derivatives of marine peptide-N6NH2 were designed by an introduction of unnatural residues or substitution of natural ones, and their intracellular activities against E. tarda were evaluated in macrophages and in mice, respectively. The minimum inhibitory concentration (MIC) value of N6NH2 and GUON6NH2 against E. tarda was 8 μg/mL. GUON6NH2 showed higher stability to trypsin, lower toxicity (<1%) and longer post-antibiotic effect (PAE) than N6NH2 and other derivatives. Antibacterial mechanism results showed that GUON6NH2 could bind to LPS and destroyed outer/inner cell membranes of E. tarda, superior to N6NH2 and norfloxacin. Both N6NH2 and GUON6NH2 were internalized into macrophages mainly via lipid rafts, micropinocytosis, and microtubule polymerization, respectively, and distributed in the cytoplasm. The intracellular inhibition rate of GUON6NH2 against E. tarda was 97.05–100%, higher than that in case of N6NH2 (96.82–100%). In the E. tarda-induced peritonitis mouse model, after treatment with of 1 μmol/kg N6NH2 and GUON6NH2, intracellular bacterial numbers were reduced by 1.54- and 1.97-Log10 CFU, respectively, higher than norfloxacin (0.35-Log10 CFU). These results suggest that GUON6NH2 may be an excellent candidate for novel antimicrobial agents to treat infectious diseases caused by intracellular E. tarda.
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Affiliation(s)
- Huihui Han
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Da Teng
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Ruoyu Mao
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Ya Hao
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Na Yang
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Zhenlong Wang
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Ting Li
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Xiumin Wang
- Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing, China.,Chinese Herbal Medicine Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jianhua Wang
- Gene Engineering Laboratory, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China.,Key Laboratory of Feed Biotechnology, Ministry of Agriculture and Rural Affairs, Beijing, China
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13
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Ma L, Luo Y, Ma YH, Lu X. Interaction between Antimicrobial Peptide CM15 and a Model Cell Membrane Affected by CM15 Terminal Amidation and the Membrane Phase State. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:1613-1621. [PMID: 33464910 DOI: 10.1021/acs.langmuir.0c03498] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Antimicrobial peptides (AMPs) have been proposed as an effective class of antimicrobial agents against microorganisms. In this work, the interaction between an antimicrobial peptide, CM15, and a negatively charged phospholipid bilayer, DPPG, was studied via sum frequency generation (SFG) vibrational spectroscopy. Two structurally correlated characteristic variables were introduced to reveal the interaction mechanism/efficiency, i.e. C-terminal amidation and temperature variation (∼20 °C, room temperature, and ∼35 °C, close to human body temperature). Experimental results indicated that owing to the increased positive charge, C-terminal amidation resulted in rapid adsorption onto the bilayer surface and efficient disruption of the outer layer, exhibiting less ordered insertion orientation. The elevated temperature (from ∼20 °C to ∼35 °C) promoted the penetration of both the outer and inner leaflets by the peptides and finally led to the disruption of the whole bilayer owing to the enhanced fluidity of the bilayer. From the perspective of the interaction mechanism, this experimental study provides two practical cues to understand the disruption process of the negatively charged model biomembranes, which can lay the structural foundation for designing and developing high-efficiency antimicrobial peptides.
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Affiliation(s)
- Liang Ma
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing, 210096, Jiangsu Province, P. R. China
| | - Yongsheng Luo
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing, 210096, Jiangsu Province, P. R. China
| | - Yong-Hao Ma
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing, 210096, Jiangsu Province, P. R. China
| | - Xiaolin Lu
- State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing, 210096, Jiangsu Province, P. R. China
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14
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Improved Stability and Activity of a Marine Peptide-N6NH2 against Edwardsiella tarda and Its Preliminary Application in Fish. Mar Drugs 2020; 18:md18120650. [PMID: 33348729 PMCID: PMC7766155 DOI: 10.3390/md18120650] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 11/28/2020] [Accepted: 12/14/2020] [Indexed: 02/06/2023] Open
Abstract
Edwardsiella tarda can cause fatal gastro-/extraintestinal diseases in fish and humans. Overuse of antibiotics has led to antibiotic resistance and contamination in the environment, which highlights the need to find new antimicrobial agents. In this study, the marine peptide-N6 was amidated at its C-terminus to generate N6NH2. The antibacterial activity of N6 and N6NH2 against E. tarda was evaluated in vitro and in vivo; their stability, toxicity and mode of action were also determined. Minimal inhibitory concentrations (MICs) of N6 and N6NH2 against E. tarda were 1.29–3.2 μM. Both N6 and N6NH2 killed bacteria by destroying the cell membrane of E. tarda and binding to lipopolysaccharide (LPS) and genomic DNA. In contrast with N6, N6NH2 improved the stability toward trypsin, reduced hemolysis (by 0.19% at a concentration of 256 μg/mL) and enhanced the ability to penetrate the bacterial outer and inner membrane. In the model of fish peritonitis caused by E. tarda, superior to norfloxacin, N6NH2 improved the survival rate of fish, reduced the bacterial load on the organs, alleviated the organ injury and regulated the immunity of the liver and kidney. These data suggest that the marine peptide N6NH2 may be a candidate for novel antimicrobial agents against E. tarda infections.
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15
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Scorpion-Venom-Derived Antimicrobial Peptide Css54 Exerts Potent Antimicrobial Activity by Disrupting Bacterial Membrane of Zoonotic Bacteria. Antibiotics (Basel) 2020; 9:antibiotics9110831. [PMID: 33233541 PMCID: PMC7699533 DOI: 10.3390/antibiotics9110831] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 11/11/2020] [Accepted: 11/18/2020] [Indexed: 01/10/2023] Open
Abstract
Antibiotic resistance is an important issue affecting humans and livestock. Antimicrobial peptides are promising alternatives to antibiotics. In this study, the antimicrobial peptide Css54, isolated from the venom of C. suffuses, was found to exhibit antimicrobial activity against bacteria such as Listeria monocytogenes, Streptococcus suis, Campylobacter jejuni, and Salmonella typhimurium that cause zoonotic diseases. Moreover, the cytotoxicity and hemolytic activity of Css54 was lower than that of melittin isolated from bee venom. Circular dichroism assays showed that Css54 has an α-helix structure in an environment mimicking that of bacterial cell membranes. We examined the effect of Css54 on bacterial membranes using N-phenyl-1-naphthylamine, 3,3'-dipropylthiadicarbbocyanine iodides, SYTOX green, and propidium iodide. Our findings suggest that the Css54 peptide kills bacteria by disrupting the bacterial membrane. Moreover, Css54 exhibited antibiofilm activity against L. monocytogenes. Thus, Css54 may be useful as an alternative to antibiotics in humans and animal husbandry.
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16
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Kabra R, Singh S. ABC Exporters in Pathogenesis: Role of Synthetic Anti-Microbial Peptides. Protein J 2020; 39:657-670. [PMID: 33068233 DOI: 10.1007/s10930-020-09931-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/12/2020] [Indexed: 11/28/2022]
Abstract
ABC exporters are involved in diverse cellular processes including lipid trafficking, drug resistance, pathogenesis etc. The greatest thrust has been in the area of drug resistance that explains the underlying well-crafted canonical architecture of its structure. Interestingly, ranging from structural organisation to subsequent design and delivery aspects lays the niche of antimicrobial peptides. One of the major highlight of this paper is the role of synthetic antimicrobial peptides in current scenario.
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Affiliation(s)
- Ritika Kabra
- National Centre for Cell Science, NCCS Complex, Ganeshkhind, Pune, 411007, India
| | - Shailza Singh
- National Centre for Cell Science, NCCS Complex, Ganeshkhind, Pune, 411007, India.
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17
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Kumar SD, Shin SY. Antimicrobial and anti-inflammatory activities of short dodecapeptides derived from duck cathelicidin: Plausible mechanism of bactericidal action and endotoxin neutralization. Eur J Med Chem 2020; 204:112580. [DOI: 10.1016/j.ejmech.2020.112580] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/27/2020] [Accepted: 06/11/2020] [Indexed: 01/04/2023]
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18
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Savini F, Loffredo M, Troiano C, Bobone S, Malanovic N, Eichmann T, Caprio L, Canale V, Park Y, Mangoni M, Stella L. Binding of an antimicrobial peptide to bacterial cells: Interaction with different species, strains and cellular components. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2020; 1862:183291. [DOI: 10.1016/j.bbamem.2020.183291] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 02/18/2020] [Accepted: 03/23/2020] [Indexed: 02/06/2023]
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19
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Ahmad B, Li Z, Hanif Q, Hu Q, Wei X, Zhang L, Khan SA, Aihemaiti M, Gulzar H, Shahid M, Si D, Zhang R. A Hybrid Peptide DEFB-TP5 Expressed in Methylotrophic Yeast Neutralizes LPS With Potent Anti-inflammatory Activities. Front Pharmacol 2020; 11:461. [PMID: 32457599 PMCID: PMC7221121 DOI: 10.3389/fphar.2020.00461] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 03/24/2020] [Indexed: 12/31/2022] Open
Abstract
DEFB-TP5 is a novel auspicious health-beneficial peptide derivative from two naturally occurring peptides, β-Defensin (DEFB) and thymopentin (TP5), and shows strong anti-inflammatory activity and binds to LPS without cytotoxicity and hemolytic effect. Furthermore, the application of DEFB-TP5 peptide is inadequate by its high cost. In the current study, we developed a biocompatible mechanism for expression of the DEFB-TP5 peptide in Pichia pastoris. The transgenic strain of hybrid DEFB-TP5 peptide with a molecular weight of 6.7kDa as predictable was obtained. The recombinant DEFB-TP5 peptide was purified by Ni-NTA chromatography, estimated 30.41 mg/L was obtained from the cell culture medium with 98.2% purity. Additionally, The purified DEFB-TP5 peptide significantly (p< 0.05) diminished the release of nitric oxide (NO), TNF-α, IL-6, IL-1β in LPS-stimulated RAW264.7 macrophages in a dose-dependent manner. This study will not only help to understand the molecular mechanism of expression that can potentially be used to develop an anti-endotoxin peptide but also to serve as the basis for the development of antimicrobial and anti-inflammatory agents as well, which also provides a potential source for the production of recombinant bioactive DEFB-TP5 at the industrial level.
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Affiliation(s)
- Baseer Ahmad
- State Key Laboratory of Animal Nutrition and Feed Sciences, Laboratory of Feed Biotechnology, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Zhongxuan Li
- State Key Laboratory of Animal Nutrition and Feed Sciences, Laboratory of Feed Biotechnology, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Quratulain Hanif
- Computational Biology Laboratory, Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, Faisalabad, Pakistan.,Department of Biotechnology, Pakistan Institute of Engineering and Applied Sciences, Nilore, Islamabad, Pakistan
| | - Qingyong Hu
- State Key Laboratory of Animal Nutrition and Feed Sciences, Laboratory of Feed Biotechnology, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Xubiao Wei
- State Key Laboratory of Animal Nutrition and Feed Sciences, Laboratory of Feed Biotechnology, College of Animal Science and Technology, China Agricultural University, Beijing, China.,College of Life Sciences, Peking University, Beijing, China
| | - Lulu Zhang
- State Key Laboratory of Animal Nutrition and Feed Sciences, Laboratory of Feed Biotechnology, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Shahzad Akbar Khan
- Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
| | - Maierhaba Aihemaiti
- State Key Laboratory of Animal Nutrition and Feed Sciences, Laboratory of Feed Biotechnology, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Huma Gulzar
- College of Life Sciences, China Agricultural University, Beijing, China
| | - Muhammad Shahid
- State Key Laboratory of Animal Nutrition and Feed Sciences, Laboratory of Feed Biotechnology, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Dayong Si
- State Key Laboratory of Animal Nutrition and Feed Sciences, Laboratory of Feed Biotechnology, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Rijun Zhang
- State Key Laboratory of Animal Nutrition and Feed Sciences, Laboratory of Feed Biotechnology, College of Animal Science and Technology, China Agricultural University, Beijing, China
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20
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Della Pelle G, Perà G, Belardinelli MC, Gerdol M, Felli M, Crognale S, Scapigliati G, Ceccacci F, Buonocore F, Porcelli F. Trematocine, a Novel Antimicrobial Peptide from the Antarctic Fish Trematomus bernacchii: Identification and Biological Activity. Antibiotics (Basel) 2020; 9:E66. [PMID: 32041161 PMCID: PMC7168153 DOI: 10.3390/antibiotics9020066] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 02/03/2020] [Accepted: 02/05/2020] [Indexed: 01/02/2023] Open
Abstract
Antimicrobial peptides (AMPs) are short peptides active against a wide range of pathogens and, therefore, they are considered a useful alternative to conventional antibiotics. We have identified a new AMP in a transcriptome derived from the Antarctic fish Trematomus bernacchii. This peptide, named Trematocine, has been investigated for its expression both at the basal level and after in vivo immunization with an endemic Antarctic bacterium (Psychrobacter sp. TAD1). Results agree with the expected behavior of a fish innate immune component, therefore we decided to synthesize the putative mature sequence of Trematocine to determine the structure, the interaction with biological membranes, and the biological activity. We showed that Trematocine folds into a α-helical structure in the presence of both zwitterionic and anionic charged vesicles. We demonstrated that Trematocine has a highly specific interaction with anionic charged vesicles and that it can kill Gram-negative bacteria, possibly via a carpet like mechanism. Moreover, Trematocine showed minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values against selected Gram-positive and Gram-negative bacteria similar to other AMPs isolated from Antarctic fishes. The peptide is a possible candidate for a new drug as it does not show any haemolytic or cytotoxic activity against mammalian cells at the concentration needed to kill the tested bacteria.
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Affiliation(s)
- Giulia Della Pelle
- Department for Innovation in Biological, Agrofood and Forest Systems, University of Tuscia, 01100 Viterbo, Italy; (G.D.P.); (G.P.); (M.C.B.); (M.F.); (S.C.); (G.S.); (F.P.)
| | - Giulia Perà
- Department for Innovation in Biological, Agrofood and Forest Systems, University of Tuscia, 01100 Viterbo, Italy; (G.D.P.); (G.P.); (M.C.B.); (M.F.); (S.C.); (G.S.); (F.P.)
| | - Maria Cristina Belardinelli
- Department for Innovation in Biological, Agrofood and Forest Systems, University of Tuscia, 01100 Viterbo, Italy; (G.D.P.); (G.P.); (M.C.B.); (M.F.); (S.C.); (G.S.); (F.P.)
| | - Marco Gerdol
- Department of Life Sciences, University of Trieste, Trieste 34128, Italy;
| | - Martina Felli
- Department for Innovation in Biological, Agrofood and Forest Systems, University of Tuscia, 01100 Viterbo, Italy; (G.D.P.); (G.P.); (M.C.B.); (M.F.); (S.C.); (G.S.); (F.P.)
| | - Silvia Crognale
- Department for Innovation in Biological, Agrofood and Forest Systems, University of Tuscia, 01100 Viterbo, Italy; (G.D.P.); (G.P.); (M.C.B.); (M.F.); (S.C.); (G.S.); (F.P.)
| | - Giuseppe Scapigliati
- Department for Innovation in Biological, Agrofood and Forest Systems, University of Tuscia, 01100 Viterbo, Italy; (G.D.P.); (G.P.); (M.C.B.); (M.F.); (S.C.); (G.S.); (F.P.)
| | - Francesca Ceccacci
- CNR—Institute for Biological Systems, Sede Secondaria di Roma-Meccanismi di Reazione, 00185 Rome, Italy;
| | - Francesco Buonocore
- Department for Innovation in Biological, Agrofood and Forest Systems, University of Tuscia, 01100 Viterbo, Italy; (G.D.P.); (G.P.); (M.C.B.); (M.F.); (S.C.); (G.S.); (F.P.)
| | - Fernando Porcelli
- Department for Innovation in Biological, Agrofood and Forest Systems, University of Tuscia, 01100 Viterbo, Italy; (G.D.P.); (G.P.); (M.C.B.); (M.F.); (S.C.); (G.S.); (F.P.)
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21
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Shyla G, Vineethkumar TV, Arun V, Divya MP, Thomas S, George S. Functional characterization of two novel peptides and their analogs identified from the skin secretion of Indosylvirana aurantiaca, an endemic frog species of Western Ghats, India. CHEMOECOLOGY 2019. [DOI: 10.1007/s00049-019-00287-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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Vineeth Kumar T, Asha R, George S. Identification and functional characterisation of Esculentin-2 HYba peptides and their C-terminally amidated analogs from the skin secretion of an endemic frog. Nat Prod Res 2019; 35:1262-1266. [PMID: 31328553 DOI: 10.1080/14786419.2019.1644636] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Here, we report the identification, functional characterisation, and the effect of C-terminal amidation on the activity profile of two novel Esculentin-2 peptides (Esculentin-2 HYba1 and Esculentin-2 HYba2). The parent peptides and their analogs exhibited potent activity against the tested Gram-positive and Gram-negative bacteria. The effect of amidation was evident in the activity profile of fish pathogens and killing kinetics. The analogs showed a 10-fold decrease in MIC, and the killing time was reduced to 10-15 minutes. The hemolytic potential was unaltered upon amidation. The selectivity index revealed that these peptides are more selective to bacteria than mammalian cells. Cytotoxicity against Hep3B cells reveals their potential to destroy cancer cells; they showed potential inhibition compared to anticancer drug silymarin. The study also highlights the need for further truncations and modifications of esculentin peptides for developing them as lead drug molecules.
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Affiliation(s)
- T Vineeth Kumar
- Interdisciplinary Biology Group, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, Kerala, India
| | - R Asha
- Chemical Biology Laboratory, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, Kerala, India
| | - Sanil George
- Interdisciplinary Biology Group, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, Kerala, India
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23
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Lai PK, Tresnak DT, Hackel BJ. Identification and elucidation of proline-rich antimicrobial peptides with enhanced potency and delivery. Biotechnol Bioeng 2019; 116:2439-2450. [PMID: 31209863 DOI: 10.1002/bit.27092] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 06/04/2019] [Accepted: 06/09/2019] [Indexed: 01/06/2023]
Abstract
Proline-rich antimicrobial peptides (PrAMPs) kill bacteria via a nonlytic mechanism in which they permeate through the outer membrane, utilize protein-mediated transport across the inner membrane, and target the ribosome to inhibit protein synthesis. We previously reported that substitutions of oncocin ( VDKPPYLPRPRPPRRIYNR - NH 2 ) with a pair of cationic residues improved the antimicrobial activity. In this study, we applied the design protocol to three other PrAMPs: apidaecin-1b, pyrrhocoricin, and bactenecin 7(1-16) and found that the substitutions (R4K and I8K/R) for apidaecin-1b improve the activity by twofold (p < .05) against nonpathogenic Escherichia coli. Moreover, the substitutions (L7K/R and R14K) for pyrrhocoricin improve the activity by 2-10-fold (p < .05) against some strains of E. coli and Salmonella Typhimurium. We also performed activity tests against inner membrane protein (SbmA or YgdD) knockout strains. The result is consistent with previous studies that SbmA is the major transporter for apidaecin-1b and pyrrhocoricin derivatives. However, bactenecin 7(1-16) functions independently of these transporters. In addition, several apidaecin-1b derivatives exhibit enhanced activity relative to wild-type only in the absence of SbmA, which is consistent with mutations that enhance transport across the inner membrane. A high performance liquid chromatography-based kinetic assay for cellular association and internalization demonstrates that the selected cationic mutations can improve cellular association in minimal media, but this enhanced association is not required for increased activity, which suggests the importance of inner membrane transport. These functional studies on cationic mutants of PrAMPs advance understanding of potency and mechanism and advance the ability to engineer improved antimicrobials as evidenced by the identification of the pyrrhocoricin mutant (L7R and R14K) with 10-fold elevated potency against pathogenic E. coli.
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Affiliation(s)
- Pin-Kuang Lai
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota
| | - Daniel T Tresnak
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota
| | - Benjamin J Hackel
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota
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24
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Ahmad B, Hanif Q, Xubiao W, Lulu Z, Shahid M, Dayong S, Rijun Z. Expression and Purification of Hybrid LL-37Tα1 Peptide in Pichia pastoris and Evaluation of Its Immunomodulatory and Anti-inflammatory Activities by LPS Neutralization. Front Immunol 2019; 10:1365. [PMID: 31258535 PMCID: PMC6587124 DOI: 10.3389/fimmu.2019.01365] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 05/29/2019] [Indexed: 12/21/2022] Open
Abstract
This study pertains to the new approach for the development of hybrid peptide LL-37Tα1 and its biomedical applications. A linear cationic hybrid peptide, LL-37Tα1 was derived from two parental peptides (LL-37 and Tα1) recognized as potent anti-endotoxin without any hemolytic or cytotoxic activity. We successfully cloned the gene of hybrid peptide LL-37Tα1 in PpICZαA vector and expressed in the Pichia pastoris. The recombinant peptide was purified by Ni-affinity column and reverse-phase high performance liquid chromatography (RP-HPLC) with an estimated molecular mass of 3.9 kDa as determined by SDS-PAGE and mass spectrometry. We analyzed the LPS neutralization by limulus amebocyte lysate (LAL) activity and the results indicate that the hybrid peptide LL-37Tα1 directly binds endotoxin and significantly (p < 0.05) neutralizes the effect of LPS in a dose-dependent manner. Lactate dehydrogenase (LDH) assay revealed that LL-37Tα1 successfully reduces the LPS-induced cytotoxicity in mouse RAW264.7 macrophages. Moreover, it significantly (p < 0.05) decreased the levels of nitric oxide, proinflammatory cytokines including TNF-α, IL-6, IL-1β, and diminished the number of apoptotic cells in LPS-stimulated mouse RAW264.7 macrophages. Our results suggest that the P. pastoris expression system is cost-effective for commercial production of the immunomodulatory and anti-inflammatory hybrid peptide (IAHP) LL-37Tα1 and the peptide may serve as effective anti-endotoxin/anti-inflammatory agent with minimal cytotoxicity.
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Affiliation(s)
- Baseer Ahmad
- State Key Laboratory of Animal Nutrition and Feed Sciences, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Quratulain Hanif
- State Key Laboratory of Animal Nutrition and Feed Sciences, College of Animal Science and Technology, China Agricultural University, Beijing, China.,National Institute for Biotechnology and Genetic Engineering, Pakistan Institute of Engineering and Applied Sciences, Faisalabad, Pakistan
| | - Wei Xubiao
- State Key Laboratory of Animal Nutrition and Feed Sciences, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Zhang Lulu
- State Key Laboratory of Animal Nutrition and Feed Sciences, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Muhammad Shahid
- State Key Laboratory of Animal Nutrition and Feed Sciences, College of Animal Science and Technology, China Agricultural University, Beijing, China.,College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Si Dayong
- State Key Laboratory of Animal Nutrition and Feed Sciences, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Zhang Rijun
- State Key Laboratory of Animal Nutrition and Feed Sciences, College of Animal Science and Technology, China Agricultural University, Beijing, China
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25
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Kim S, Lee DG. PMAP-23 triggers cell death by nitric oxide-induced redox imbalance in Escherichia coli. Biochim Biophys Acta Gen Subj 2019; 1863:1187-1195. [PMID: 31026481 DOI: 10.1016/j.bbagen.2019.04.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 04/15/2019] [Accepted: 04/22/2019] [Indexed: 12/28/2022]
Abstract
BACKGROUND Antibiotic resistance is a global problem and there is an urgent need to augment the arsenal against pathogenic bacteria. The emergence of different drug resistant bacteria is threatening human lives to be pushed toward the pre-antibiotic era. Antimicrobial peptides (AMPs) are a host defense component against infectious pathogens in response to innate immunity. PMAP-23, an AMP derived from porcine myeloid, possesses antibacterial activity. It is currently not clear how the antibacterial activity of PMAP-23 is manifested. METHODS The disruptive effect of nitric oxide (NO) on the catalase activity, reactive oxygen species (ROS) production, DNA oxidation and apoptosis-like death were evaluated using the NO generation inhibitor. RESULTS In this investigation, PMAP-23 generates NO in a dose dependent manner. NO deactivated catalase and this antioxidant could not protect Escherichia coli against ROS, especially hydroxyl radical. This redox imbalance was shown to induce oxidative stress, thus leading to DNA strand break. Consequently, PMAP-23 treated E. coli cells resulted in apoptosis-like death. These physiological changes were inhibited when NO generation was inhibited. In the ΔdinF mutant, the levels of DNA strand break sharply increased and the cells were more sensitive to PMAP-23 than wild type. CONCLUSION Our data strongly indicates that PMAP-23 mediates apoptosis-like cell death through affecting intracellular NO homeostasis. Furthermore, our results demonstrate that DinF functioned in protection from oxidative DNA damage. GENERAL SIGNIFICANCE The identification of PMAP-23 antibacterial activity and mechanism provides a promising antibacterial agent, supporting the role of NO in cell death regulation.
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Affiliation(s)
- Suhyun Kim
- School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu 41566, Republic of Korea
| | - Dong Gun Lee
- School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu 41566, Republic of Korea.
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26
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Kim S, Lee DG. Role of calcium in reactive oxygen species-induced apoptosis in Candida albicans: an antifungal mechanism of antimicrobial peptide, PMAP-23. Free Radic Res 2019; 53:8-17. [DOI: 10.1080/10715762.2018.1511052] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Suhyun Kim
- School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Korea
| | - Dong Gun Lee
- School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Korea
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27
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Bao K, Yuan W, Ma C, Yu X, Wang L, Hong M, Xi X, Zhou M, Chen T. Modification Targeting the "Rana Box" Motif of a Novel Nigrocin Peptide From Hylarana latouchii Enhances and Broadens Its Potency Against Multiple Bacteria. Front Microbiol 2018; 9:2846. [PMID: 30555431 PMCID: PMC6280737 DOI: 10.3389/fmicb.2018.02846] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 11/05/2018] [Indexed: 11/15/2022] Open
Abstract
Public health is confronting the threat caused by antibiotic resistance and this means new antibacterial strategies must be developed urgently. Antimicrobial peptides (AMPs) have been considered as promising therapeutic candidates against infection in the post-antibiotic era. In this paper, we dismissed the significance of “Rana box” in the natural nigrocin-HL identified from skin secretion of Hylarana latouchii by comparing its activity with nigrocin-HLD without the motif. By substituting the “Rana box” sequence with an amidated phenylalanine residue, the natural peptide was modified into a shorter AMP nigrocin-HLM. Activities and toxicities of these two peptides in vitro and in vivo were compared. As a result, nigrocin-HLM not only displayed significantly increased potency against several representative microbes, but also high activity against the antibiotic-resistant methicillin-resistant S. aureus (MRSA, NCTC 12493 and ATCC43300 and several clinical isolates) as evidenced by markedly reduced minimal inhibitory concentration (MIC), minimal bactericidal concentration (MBC), and minimum biofilm eradication concentration (MBEC). More strikingly, nigrocin-HLM exhibited prominent inhibition against MRSA infection in a pneumonia mice model. In addition, the substitution attenuated the toxicity of nigrocin-HLM as evidenced by precipitously decreased hemolytic and cytotoxic activities in vitro, and acute toxicity to mice in vivo. Taken these results into consideration, nigrocin-HLM should be a promising therapeutic candidate for anti-infection. And in addition to dismiss an indispensable role of “Rana box” in maintaining antimicrobial activity of nigrocin-HL, our data provided an inspired strategy for peptide optimization.
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Affiliation(s)
- Kaifan Bao
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, China.,Natural Drug Discovery Group, School of Pharmacy, Faculty of Medicine, Health and Life Sciences, Queen's University Belfast, Belfast, United Kingdom
| | - Weiyuan Yuan
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, China
| | - Chengbang Ma
- Natural Drug Discovery Group, School of Pharmacy, Faculty of Medicine, Health and Life Sciences, Queen's University Belfast, Belfast, United Kingdom
| | - Xi Yu
- Nanjing Pharmaceutical Co., Ltd., Nanjing, China
| | - Lei Wang
- Natural Drug Discovery Group, School of Pharmacy, Faculty of Medicine, Health and Life Sciences, Queen's University Belfast, Belfast, United Kingdom
| | - Min Hong
- Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xinping Xi
- Natural Drug Discovery Group, School of Pharmacy, Faculty of Medicine, Health and Life Sciences, Queen's University Belfast, Belfast, United Kingdom
| | - Mei Zhou
- Natural Drug Discovery Group, School of Pharmacy, Faculty of Medicine, Health and Life Sciences, Queen's University Belfast, Belfast, United Kingdom
| | - Tianbao Chen
- Natural Drug Discovery Group, School of Pharmacy, Faculty of Medicine, Health and Life Sciences, Queen's University Belfast, Belfast, United Kingdom
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28
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Cardon S, Sachon E, Carlier L, Drujon T, Walrant A, Alemán-Navarro E, Martínez-Osorio V, Guianvarc'h D, Sagan S, Fleury Y, Marquant R, Piesse C, Rosenstein Y, Auvynet C, Lacombe C. Peptidoglycan potentiates the membrane disrupting effect of the carboxyamidated form of DMS-DA6, a Gram-positive selective antimicrobial peptide isolated from Pachymedusa dacnicolor skin. PLoS One 2018; 13:e0205727. [PMID: 30325956 PMCID: PMC6191125 DOI: 10.1371/journal.pone.0205727] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 10/01/2018] [Indexed: 11/18/2022] Open
Abstract
The occurrence of nosocomial infections has been on the rise for the past twenty years. Notably, infections caused by the Gram-positive bacteria Staphylococcus aureus represent a major clinical problem, as an increase in antibiotic multi-resistant strains has accompanied this rise. There is thus a crucial need to find and characterize new antibiotics against Gram-positive bacteria, and against antibiotic-resistant strains in general. We identified a new dermaseptin, DMS-DA6, produced by the skin of the Mexican frog Pachymedusa dacnicolor, with specific antibacterial activity against Gram-positive bacteria. This peptide is particularly effective against two multiple drug-resistant strains Enterococcus faecium BM4147 and Staphylococcus aureus DAR5829, and has no hemolytic activity. DMS-DA6 is naturally produced with the C-terminal carboxyl group in either the free or amide forms. By using Gram-positive model membranes and different experimental approaches, we showed that both forms of the peptide adopt an α-helical fold and have the same ability to insert into, and to disorganize a membrane composed of anionic lipids. However, the bactericidal capacity of DMS-DA6-NH2 was consistently more potent than that of DMS-DA6-OH. Remarkably, rather than resulting from the interaction with the negatively charged lipids of the membrane, or from a more stable conformation towards proteolysis, the increased capacity to permeabilize the membrane of Gram-positive bacteria of the carboxyamidated form of DMS-DA6 was found to result from its enhanced ability to interact with peptidoglycan.
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Affiliation(s)
- Sébastien Cardon
- Sorbonne Université, École normale supérieure, PSL University, CNRS, Laboratoire des Biomolécules, LBM, Paris, France
| | - Emmanuelle Sachon
- Sorbonne Université, École normale supérieure, PSL University, CNRS, Laboratoire des Biomolécules, LBM, Paris, France
- Sorbonne Université, CNRS, Institut de Biologie Paris-Seine (IBPS), Plate-forme Spectrométrie de Masse et Protéomique, Paris, France
| | - Ludovic Carlier
- Sorbonne Université, École normale supérieure, PSL University, CNRS, Laboratoire des Biomolécules, LBM, Paris, France
| | - Thierry Drujon
- Sorbonne Université, École normale supérieure, PSL University, CNRS, Laboratoire des Biomolécules, LBM, Paris, France
| | - Astrid Walrant
- Sorbonne Université, École normale supérieure, PSL University, CNRS, Laboratoire des Biomolécules, LBM, Paris, France
| | - Estefanía Alemán-Navarro
- Instituto de Biotecnologia, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, México
| | - Verónica Martínez-Osorio
- Instituto de Biotecnologia, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, México
| | - Dominique Guianvarc'h
- Sorbonne Université, École normale supérieure, PSL University, CNRS, Laboratoire des Biomolécules, LBM, Paris, France
| | - Sandrine Sagan
- Sorbonne Université, École normale supérieure, PSL University, CNRS, Laboratoire des Biomolécules, LBM, Paris, France
| | - Yannick Fleury
- Université de Bretagne Occidentale, LUBEM EA, IUT Quimper, Quimper, France
| | - Rodrigue Marquant
- Sorbonne Université, École normale supérieure, PSL University, CNRS, Laboratoire des Biomolécules, LBM, Paris, France
| | - Christophe Piesse
- Sorbonne Université, CNRS, Institut de Biologie Paris-Seine (IBPS), Plate-forme de Synthèse Peptidique, Paris, France
| | - Yvonne Rosenstein
- Instituto de Biotecnologia, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, México
| | - Constance Auvynet
- Instituto de Biotecnologia, Universidad Nacional Autónoma de México, Cuernavaca, Morelos, México
- * E-mail: (CA); (CL)
| | - Claire Lacombe
- Sorbonne Université, École normale supérieure, PSL University, CNRS, Laboratoire des Biomolécules, LBM, Paris, France
- Faculté des Sciences et Technologie, Université Paris Est-Créteil Val de Marne, Créteil, France
- * E-mail: (CA); (CL)
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Roy R, Tiwari M, Donelli G, Tiwari V. Strategies for combating bacterial biofilms: A focus on anti-biofilm agents and their mechanisms of action. Virulence 2018; 9:522-554. [PMID: 28362216 PMCID: PMC5955472 DOI: 10.1080/21505594.2017.1313372] [Citation(s) in RCA: 691] [Impact Index Per Article: 115.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Biofilm refers to the complex, sessile communities of microbes found either attached to a surface or buried firmly in an extracellular matrix as aggregates. The biofilm matrix surrounding bacteria makes them tolerant to harsh conditions and resistant to antibacterial treatments. Moreover, the biofilms are responsible for causing a broad range of chronic diseases and due to the emergence of antibiotic resistance in bacteria it has really become difficult to treat them with efficacy. Furthermore, the antibiotics available till date are ineffective for treating these biofilm related infections due to their higher values of minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC), which may result in in-vivo toxicity. Hence, it is critically important to design or screen anti-biofilm molecules that can effectively minimize and eradicate biofilm related infections. In the present article, we have highlighted the mechanism of biofilm formation with reference to different models and various methods used for biofilm detection. A major focus has been put on various anti-biofilm molecules discovered or tested till date which may include herbal active compounds, chelating agents, peptide antibiotics, lantibiotics and synthetic chemical compounds along with their structures, mechanism of action and their respective MICs, MBCs, minimum biofilm inhibitory concentrations (MBICs) as well as the half maximal inhibitory concentration (IC50) values available in the literature so far. Different mode of action of anti biofilm molecules addressed here are inhibition via interference in the quorum sensing pathways, adhesion mechanism, disruption of extracellular DNA, protein, lipopolysaccharides, exopolysaccharides and secondary messengers involved in various signaling pathways. From this study, we conclude that the molecules considered here might be used to treat biofilm-associated infections after significant structural modifications, thereby investigating its effective delivery in the host. It should also be ensured that minimum effective concentration of these molecules must be capable of eradicating biofilm infections with maximum potency without posing any adverse side effects on the host.
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Affiliation(s)
- Ranita Roy
- a Department of Biochemistry , Central University of Rajasthan , Ajmer , India
| | - Monalisa Tiwari
- a Department of Biochemistry , Central University of Rajasthan , Ajmer , India
| | - Gianfranco Donelli
- b Microbial Biofilm Laboratory, IRCCS Fondazione Santa Lucia , Rome , Italy
| | - Vishvanath Tiwari
- a Department of Biochemistry , Central University of Rajasthan , Ajmer , India
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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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31
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Park J, Kang HK, Choi MC, Chae JD, Son BK, Chong YP, Seo CH, Park Y. Antibacterial activity and mechanism of action of analogues derived from the antimicrobial peptide mBjAMP1 isolated from Branchiostoma japonicum. J Antimicrob Chemother 2018; 73:2054-2063. [DOI: 10.1093/jac/dky144] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 03/21/2018] [Indexed: 12/12/2022] Open
Affiliation(s)
- Jonggwan Park
- Department of Bioinformatics, Kongju National University, Kongju, South Korea
| | - Hee Kyoung Kang
- Department of Biomedical Science, Chosun University, Gwangju, South Korea
| | - Moon-Chang Choi
- Department of Biomedical Science, Chosun University, Gwangju, South Korea
| | - Jeong Don Chae
- Department of Laboratory Medicine, Eulji University-Eulji General Hospital, Seoul, Republic of Korea
| | - Byoung Kwan Son
- Department of Internal Medicine, Eulji University-Eulji General Hospital, Seoul, Republic of Korea
| | - Yong Pil Chong
- Department of Infectious Disease, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Chang Ho Seo
- Department of Bioinformatics, Kongju National University, Kongju, South Korea
| | - Yoonkyung Park
- Department of Biomedical Science, Chosun University, Gwangju, South Korea
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Antimicrobial activity and self-assembly behavior of antimicrobial peptide chensinin-1b with lipophilic alkyl tails. Eur J Med Chem 2018; 150:546-558. [PMID: 29549839 DOI: 10.1016/j.ejmech.2018.03.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 12/15/2017] [Accepted: 03/08/2018] [Indexed: 12/26/2022]
Abstract
The threshold hydrophobicity and amphipathic structure of the peptidic chain are important for the biological function of antimicrobial peptides. Chensinin-1b exhibits broad-spectrum bactericidal activity with no hemolytic activity but has almost no anticancer ability against the selected cancer cell lines. In this study, the conjugation of aliphatic acid was designed with different lengths of N-terminal of chensinin-1b, the antimicrobial activity of the resulting lipo-chensinin-1b was examined, in which OA-C1b showed much stronger activity than those of cheninin-1b and the other two lipopeptides. The membrane interaction between the lipo-chensinin-1b and real/mimetic bacterial cell membrane was investigated. Electrostatic interactions between the lipo-chensinin-1b and lipopolysaccharides were detected by isothermal titration calorimetry and the binding affinities were 10.83 μM, 8.77 μM and 7.35 μM for OA-C1b, LA-C1b and PA-C1b, respectively. The antimicrobial activity and membrane interaction ability of the lipo-chensinin-1b followed this order: OA-C1b > chensinin-1b > LA-C1b > PA-C1b. In addition, the lipo-chensinin-1b also exhibited lytic activity against various cancer cells and demonstrated the ability to inhibit LPS-stimulated cytokine release from human U937 cells. The CD spectra indicated that the helical or β-strands contents were existed as the main components in TFE or LPS solution, respectively. The self-assembly behavior was trigged by the solution pH and affected by the length of carbon chain, in which chensinin-1b, OA-C1b, LA-C1b and PA-C1b formed micelles at neutral pH and the micelle size increased for chensinin-1b, OA-C1b and LA-C1b. PA-C1b formed nanofibers in an acidic environment indicated by TEM experiments, and the peptides formed aggregates in an acidic environment and re-dissociated when the pH was adjusted to neutral.
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33
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Shen M, Dong W, Qian J, Zou L. Antimicrobial activity and membrane interaction mechanism of the antimicrobial peptides derived from Rana chensinensis with short sequences. Biologia (Bratisl) 2017. [DOI: 10.1515/biolog-2017-0122] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Vineeth Kumar TPVK, Asha R, Shyla G, George S. Identification and characterization of novel host defense peptides from the skin secretion of the fungoid frog, Hydrophylax bahuvistara (Anura: Ranidae). Chem Biol Drug Des 2017; 92:1409-1418. [PMID: 28072492 DOI: 10.1111/cbdd.12937] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 12/22/2016] [Accepted: 01/03/2017] [Indexed: 12/16/2022]
Abstract
Two novel peptides (brevinin1 HYba1 and brevinin1 HYba2) were identified from the skin secretion of the frog Hydrophylax bahuvistara, endemic to Western Ghats, India, and their amino acid sequences were confirmed using cDNA cloning and LC/MS/MS. Antibacterial, hemolytic, and cytotoxic activities of brevinin1 peptides and their synthetic analogs (amidated C-terminus) were investigated and compared. All the peptides except the acidic forms showed antibacterial activity against all tested Gram-positive and Gram-negative bacteria. They exhibited low hemolysis on human erythrocytes and showed potent cytotoxic activity against Hep 3B cancer cell line. Upon amidation, the peptides showed increased activity against the tested microbes without altering their hemolytic and cytotoxic properties. The study also emphasizes the need for screening endemic amphibian fauna of Western Ghats, as a potential source of host defense peptides with possible therapeutic applications in the future.
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Affiliation(s)
| | - Radhamony Asha
- Chemical Biology Laboratory, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, Kerala, India
| | - Gopal Shyla
- Molecular Ecology Laboratory, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, Kerala, India
| | - Sanil George
- Molecular Ecology Laboratory, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, Kerala, India
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35
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Savini F, Luca V, Bocedi A, Massoud R, Park Y, Mangoni ML, Stella L. Cell-Density Dependence of Host-Defense Peptide Activity and Selectivity in the Presence of Host Cells. ACS Chem Biol 2017; 12:52-56. [PMID: 27935673 DOI: 10.1021/acschembio.6b00910] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Host-defense peptides (HDPs) are promising compounds against multidrug-resistant microbes. In vitro, their bactericidal and toxic concentrations are significantly different, but this might be due to the use of separate assays, with different cell densities. For experiments with a single cell type, the cell-density dependence of the active concentration of the DNS-PMAP23 HDP could be predicted based on the water/cell-membrane partition equilibrium and exhibited a lower bound at low cell counts. On the basis of these data, in the simultaneous presence of both bacteria and an excess of human cells, one would expect no significant toxicity, but also inhibition of the bactericidal activity due to peptide sequestration by host cells. However, this inhibition did not take place in assays with mixed cell populations, showing that for the HDP esculentin-1a(1-21)NH2, a range of bactericidal, nontoxic concentrations exists and confirming the effective selectivity of HDPs. Mixed-cell assays might be necessary to effectively asses HDP selectivity.
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Affiliation(s)
| | - Vincenzo Luca
- Department
of Biochemical Sciences “A. Rossi Fanelli”, Istituto
Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza University of Rome, 00185 Rome, Italy
| | | | | | - Yoonkyung Park
- Department
of Biotechnology, Chosun University, 501−759 Gwangju, Korea
| | - Maria Luisa Mangoni
- Department
of Biochemical Sciences “A. Rossi Fanelli”, Istituto
Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza University of Rome, 00185 Rome, Italy
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36
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Antimicrobial and anti-inflammatory activities of three chensinin-1 peptides containing mutation of glycine and histidine residues. Sci Rep 2017; 7:40228. [PMID: 28054660 PMCID: PMC5215317 DOI: 10.1038/srep40228] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 12/01/2016] [Indexed: 11/16/2022] Open
Abstract
The natural peptide chensinin-1 doesnot exhibit its desired biological properties. In this study, the mutant MC1-1 was designed by replacing Gly in the chensinin-1 sequence with Trp. Mutants MC1-2 and MC1-3 were designed based on the MC1-1 sequence to investigate the specific role of His residues. The mutated peptides presented α-helicity in a membrane-mimetic environment and exhibited broad-spectrum antimicrobial activities; in contrast to Trp residues, His residues were dispensable for interacting with the cell membrane. The interactions between the mutant peptides and lipopolysaccharide (LPS) facilitated the ingestion of peptides by Gram-negative bacteria. The binding affinities of the peptides were similar, at approximately 10 μM, but ΔH for MC1-2 was −7.3 kcal.mol−1, which was 6-9 folds higher than those of MC1-1 and MC1-3, probably due to the conformational changes. All mutant peptides demonstrated the ability to inhibit LPS-induced tumour-necrosis factor-α (TNF-α) and interleukin-6 (IL-6) release from murine RAW264.7 cells. In addition, the representative peptide MC1-1showed better inhibition of serum TNF-α and IL-6 levels compared to polymyxin B (PMB), a potent binder and neutralizer of LPS as positive control in LPS-challenged mice model. These data suggest that the mutant peptides could be promising molecules for development as chensinin-based therapeutic agents against sepsis.
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da Hora GCA, Archilha NL, Lopes JLS, Müller DM, Coutinho K, Itri R, Soares TA. Membrane negative curvature induced by a hybrid peptide from pediocin PA-1 and plantaricin 149 as revealed by atomistic molecular dynamics simulations. SOFT MATTER 2016; 12:8884-8898. [PMID: 27722742 DOI: 10.1039/c6sm01714b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Antimicrobial peptides (AMPs) are cationic peptides that kill bacteria with a broad spectrum of action, low toxicity to mammalian cells and exceptionally low rates of bacterial resistance. These features have led to considerable efforts in developing AMPs as an alternative antibacterial therapy. In vitro studies have shown that AMPs interfere with membrane bilayer integrity via several possible mechanisms, which are not entirely understood. We have performed the synthesis, membrane lysis measurements, and biophysical characterization of a novel hybrid peptide. These measurements show that PA-Pln149 does not form nanopores, but instead promotes membrane rupture. It causes fast rupture of the bacterial model membrane (POPG-rich) at concentrations 100-fold lower than that required for the disruption of mammalian model membranes (POPC-rich). Atomistic molecular dynamics (MD) simulations were performed for single and multiple copies of PA-Pln149 in the presence of mixed and pure POPC/POPG bilayers to investigate the concentration-dependent membrane disruption by the hybrid peptide. These simulations reproduced the experimental trend and provided a potential mechanism of action for PA-Pln149. It shows that the PA-Pln149 does not form nanopores, but instead promotes membrane destabilization through peptide aggregation and induction of membrane negative curvature with the collapse of the lamellar arrangement. The sequence of events depicted for PA-Pln149 may offer insights into the mechanism of action of AMPs previously shown to induce negative deformation of membrane curvature and often associated with peptide translocation via non-bilayer intermediate structures.
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Affiliation(s)
- G C A da Hora
- Departamento de Química Fundamental, Universidade Federal de Pernambuco, 50740-560 Cidade Universitária, Recife, Brazil.
| | - N L Archilha
- Instituto de Física, Universidade de São Paulo, 05508-090 Cidade Universitária, São Paulo, Brazil.
| | - J L S Lopes
- Instituto de Física, Universidade de São Paulo, 05508-090 Cidade Universitária, São Paulo, Brazil.
| | - D M Müller
- Departamento de Química Orgánica, Facultad de Bioquímica y Cs. Biológicas, Universidad Nacional del Litoral (U.N.L). Ciudad Universitaria, C.C.242, (C.P:3000) Santa Fe, Argentina
| | - K Coutinho
- Instituto de Física, Universidade de São Paulo, 05508-090 Cidade Universitária, São Paulo, Brazil.
| | - R Itri
- Instituto de Física, Universidade de São Paulo, 05508-090 Cidade Universitária, São Paulo, Brazil.
| | - T A Soares
- Departamento de Química Fundamental, Universidade Federal de Pernambuco, 50740-560 Cidade Universitária, Recife, Brazil. and Department of Chemistry, Umeå University, 90187 Umeå, Sweden
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Irazazabal LN, Porto WF, Ribeiro SM, Casale S, Humblot V, Ladram A, Franco OL. Selective amino acid substitution reduces cytotoxicity of the antimicrobial peptide mastoparan. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:2699-2708. [DOI: 10.1016/j.bbamem.2016.07.001] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Revised: 06/28/2016] [Accepted: 07/12/2016] [Indexed: 12/19/2022]
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A potential food biopreservative, CecXJ-37N, non-covalently intercalates into the nucleotides of bacterial genomic DNA beyond membrane attack. Food Chem 2016; 217:576-584. [PMID: 27664674 DOI: 10.1016/j.foodchem.2016.09.033] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 09/03/2016] [Accepted: 09/05/2016] [Indexed: 01/10/2023]
Abstract
The antibacterial activities and mechanism of an amide-modified peptide CecXJ-37N were investigated in this study. CecXJ-37N showed small MICs (0.25-7.8μM) against eight harmful strains common in food industry. The α-helix proportion of CecXJ-37N increased by 11-fold in prokaryotic membrane comparable environments; cytotoxicity studies demonstrated the MHC was significantly higher than that of non-amidated isoform. Moreover, CecXJ-37N possessed stronger capacities to resist trypsin and pepsin hydrolysis within two hours. Flow cytometry and scanning electron microscopy demonstrated that CecXJ-37N induced pore-formation, morphological changes, and lysed E. coli cells. Fluorescence microscopy indicated that CecXJ-37N penetrated E. coli membrane and accumulated in cytoplasm. Further ultraviolet-visible spectroscopy suggested that CecXJ-37N changed the action mode of parental peptide interacting with bacterial genome from outside binding to a tightly non-covalent intercalation into nucleotides. Overall, this study suggested that amide-modification enhanced antimicrobial activity and reduced the cytotoxicity, thus could be potential strategies for developing novel food preservatives.
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40
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Chemistry and Antimicrobial Potential of the Buffalo Myeloid Cathelicidin, BuMAP-34. Int J Pept Res Ther 2016. [DOI: 10.1007/s10989-016-9520-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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41
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Antimicrobial Peptide CMA3 Derived from the CA-MA Hybrid Peptide: Antibacterial and Anti-inflammatory Activities with Low Cytotoxicity and Mechanism of Action in Escherichia coli. Antimicrob Agents Chemother 2015; 60:495-506. [PMID: 26552969 DOI: 10.1128/aac.01998-15] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 10/28/2015] [Indexed: 12/20/2022] Open
Abstract
CA-MA is a hybrid antimicrobial peptide (AMP) derived from two naturally occurring AMPs, cecropin A and magainin 2. CA-MA shows strong antimicrobial activity against Gram-negative and Gram-positive bacteria but also exhibits cytotoxicity toward mammalian cells. Our objective was to identify CA-MA analogues with reduced cytotoxicity by systematic replacement of amino acids with positively charged R groups (His and Lys), aliphatic R groups (Leu), or polar R groups (Glu). Among the CA-MA analogues studied (CMA1 to -6), CMA3 showed the strongest antimicrobial activity, including against drug-resistant Escherichia coli and Pseudomonas aeruginosa strains isolated from hospital patients. CMA3 appeared to act by inducing pore formation (toroidal model) in the bacterial membrane. In cytotoxicity assays, CMA3 showed little cytotoxicity toward human red blood cells (hRBCs) or HaCaT cells. Additionally, no fluorescence was released from small or giant unilamellar vesicles exposed to 60 μM CMA3 for 80 s, whereas fluorescence was released within 35 s upon exposure to CA-MA. CMA3 also exerted strong lipopolysaccharide (LPS)-neutralizing activity in RAW 264.7 cells, and BALB/c mice exposed to LPS after infection by Escherichia coli showed improved survival after administration of one 0.5-mg/kg of body weight or 1-mg/kg dose of CMA3. Finally, in a mouse model of septic shock, CMA3 reduced the levels of proinflammatory factors, including both nitric oxide and white blood cells, and correspondingly reduced lung tissue damage. This study suggests that CMA3 is an antimicrobial/antiendotoxin peptide that could serve as the basis for the development of anti-inflammatory and/or antimicrobial agents with low cytotoxicity.
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42
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Synthetic dendrimeric peptide active against biofilm and persister cells of Pseudomonas aeruginosa. Appl Microbiol Biotechnol 2015; 99:8125-35. [DOI: 10.1007/s00253-015-6645-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 04/23/2015] [Accepted: 04/25/2015] [Indexed: 01/03/2023]
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43
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De Zoysa GH, Cameron AJ, Hegde VV, Raghothama S, Sarojini V. Antimicrobial Peptides with Potential for Biofilm Eradication: Synthesis and Structure Activity Relationship Studies of Battacin Peptides. J Med Chem 2015; 58:625-39. [DOI: 10.1021/jm501084q] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gayan Heruka De Zoysa
- School
of Chemical Sciences, The University of Auckland, Private Bag, 92019 Auckland, New Zealand
| | - Alan James Cameron
- School
of Chemical Sciences, The University of Auckland, Private Bag, 92019 Auckland, New Zealand
| | - Veena V. Hegde
- NMR
Research Centre, Indian Institute of Science, Bangalore 560012, India
| | | | - Vijayalekshmi Sarojini
- School
of Chemical Sciences, The University of Auckland, Private Bag, 92019 Auckland, New Zealand
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44
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Hlaváček J, Vítovcová M, Sázelová P, Pícha J, Vaněk V, Buděšínský M, Jiráček J, Gillner DM, Holz RC, Mikšík I, Kašička V. Mono-N-acyl-2,6-diaminopimelic acid derivatives: Analysis by electromigration and spectroscopic methods and examination of enzyme inhibitory activity. Anal Biochem 2014; 467:4-13. [DOI: 10.1016/j.ab.2014.08.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 08/15/2014] [Accepted: 08/26/2014] [Indexed: 10/24/2022]
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45
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Sun Y, Dong W, Sun L, Ma L, Shang D. Insights into the membrane interaction mechanism and antibacterial properties of chensinin-1b. Biomaterials 2014; 37:299-311. [PMID: 25453959 DOI: 10.1016/j.biomaterials.2014.10.041] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2014] [Accepted: 10/02/2014] [Indexed: 11/29/2022]
Abstract
Antimicrobial peptides (AMPs) with non-specific membrane disrupting activities are thought to exert their antimicrobial activity as a result of their cationicity, hydrophobicity and α-helical or β-sheet structures. Chensinin-1, a native peptide from skin secretions of Rana chensinensis, fails to manifest its desired biological properties because its low hydrophobic nature and an adopted random coil structure in a membrane-mimetic environment. In this study, chensinin-1b was designed by rearranging the amino acid sequence of its hydrophilic/polar residues on one face and its hydrophobic/nonpolar residues on the opposite face according to its helical diagram, and by replacing three Gly residues with three Trp residues. Introduction of Trp residues significantly promoted the binding of the peptide to the bacterial outer membrane and exerted bactericidal activity through cytoplasmic membrane damage. Chensinin-1b demonstrates higher antimicrobial activity and greater cell selectivity than its parent peptide, chensinin-1. The electrostatic interactions between chensinin-1b and lipopolysaccharide (LPS) may have facilitated the uptake of the peptide into Gram-negative cells and be also helpful to disrupt the bacterial cytoplasmic membrane, as evidenced by depolarisation of the membrane potential and leakage of calceins from the liposomes of Escherichia coli and Staphylococcus aureus. Chensinin-1b was also found to penetrate mouse skin and was also effective in vivo, as measured by hydroxyproline levels in a wound infection mouse model, and could therefore act as an anti-infective agent for wound healing.
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Affiliation(s)
- Yue Sun
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Weibing Dong
- 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
| | - Li Sun
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - Lijie Ma
- School of Life Science, Liaoning Normal University, Dalian 116081, China
| | - 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.
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46
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The effects of the C-terminal amidation of mastoparans on their biological actions and interactions with membrane-mimetic systems. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:2357-68. [DOI: 10.1016/j.bbamem.2014.06.012] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 06/10/2014] [Accepted: 06/13/2014] [Indexed: 11/20/2022]
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47
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Roversi D, Luca V, Aureli S, Park Y, Mangoni ML, Stella L. How many antimicrobial peptide molecules kill a bacterium? The case of PMAP-23. ACS Chem Biol 2014; 9:2003-7. [PMID: 25058470 DOI: 10.1021/cb500426r] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Antimicrobial peptides (AMPs) kill bacteria mainly through the perturbation of their membranes and are promising compounds to fight drug resistance. Models of the mechanism of AMPs-induced membrane perturbation were developed based on experiments in liposomes, but their relevance for bacterial killing is debated. We determined the association of an analogue of the AMP PMAP-23 to Escherichia coli cells, under the same experimental conditions used to measure bactericidal activity. Killing took place only when bound peptides completely saturated bacterial membranes (10(6)-10(7) bound peptides per cell), indicating that the "carpet" model for the perturbation of artificial bilayers is representative of what happens in real bacteria. This finding supports the view that, at least for this peptide, a microbicidal mechanism is possible in vivo only at micromolar total peptide concentrations. We also showed that, notwithstanding their simplicity, liposomes represent a reliable model to characterize AMPs partition in bacterial membranes.
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Affiliation(s)
- Daniela Roversi
- Department
of Chemical Sciences and Technologies, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Vincenzo Luca
- Department
of Biochemical Sciences “A. Rossi Fanelli”, Istituto
Pasteur-Fondazione Cenci Bolognetti, Sapienza Rome University, 00185 Rome, Italy
| | - Simone Aureli
- Department
of Chemical Sciences and Technologies, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Yoonkyung Park
- Department
of Biotechnology, Chosun University, 501-759 Gwangju, Korea
| | - Maria Luisa Mangoni
- Department
of Biochemical Sciences “A. Rossi Fanelli”, Istituto
Pasteur-Fondazione Cenci Bolognetti, Sapienza Rome University, 00185 Rome, Italy
| | - Lorenzo Stella
- Department
of Chemical Sciences and Technologies, University of Rome Tor Vergata, 00133 Rome, Italy
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48
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Chemical synthesis, structure-activity relationship, and properties of shepherin I: a fungicidal peptide enriched in glycine-glycine-histidine motifs. Amino Acids 2014; 46:2573-86. [PMID: 25106507 DOI: 10.1007/s00726-014-1811-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Accepted: 07/09/2014] [Indexed: 10/24/2022]
Abstract
Although glycine-rich antimicrobial peptides (AMPs) are found in animals and plants, very little has been reported on their chemistry, structure activity-relationship, and properties. We investigated those topics for Shepherin I (Shep I), a glycine-rich AMP with the unique amino acid sequence G(1)YGGHGGHGGHGGHGGHGGHGHGGGGHG(28). Shep I and analogues were synthesized by the solid-phase method at 60 °C using conventional heating. Purification followed by chemical characterization confirmed the products' identities and high purity. Amino acid analysis provided their peptide contents. All peptides were active against the clinically important Candida species, but ineffective against bacteria and mycelia fungi. Truncation of the N- or C-terminal portion reduced Shep I antifungal activity, the latter being more pronounced. Carboxyamidation of Shep I did not affect the activity against C. albicans or C. tropicalis, but increased activity against S. cerevisiae. Carboxyamidated analogues Shep I (3-28)a and Shep I (6-28)a were equipotent to Shep I and Shep Ia against Candida species. As with most cationic AMPs, all peptides had their activity significantly reduced in high-salt concentrations, a disadvantage that is defeated if 10 µM ZnCl2 is present. At 100 µM, the peptides were practically not hemolytic. Shep Ia also killed C. albicans MDM8 and ATCC 90028 cells. Fluo-Shep Ia, an analogue labeled with 5(6)-carboxyfluorescein, was rapidly internalized by C. albicans MDM8 cells, a salt-sensitive process dependent on metabolic energy and temperature. Altogether, such results shed light on the chemistry, structural requirements for activity, and other properties of candidacidal glycine-rich peptides. Furthermore, they show that Shep Ia may have strong potential for use in topical application.
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49
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Investigating specific bacterial resistance to AMPs by using a magainin I-resistant Escherichia coli model. J Antibiot (Tokyo) 2014; 67:681-7. [DOI: 10.1038/ja.2014.48] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 02/17/2014] [Accepted: 03/24/2014] [Indexed: 11/09/2022]
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50
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Seo JK, Lee MJ, Jung HG, Go HJ, Kim YJ, Park NG. Antimicrobial function of SHβAP, a novel hemoglobin β chain-related antimicrobial peptide, isolated from the liver of skipjack tuna, Katsuwonus pelamis. FISH & SHELLFISH IMMUNOLOGY 2014; 37:173-183. [PMID: 24495783 DOI: 10.1016/j.fsi.2014.01.021] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2012] [Revised: 01/24/2014] [Accepted: 01/26/2014] [Indexed: 06/03/2023]
Abstract
A 2.3 kDa of antimicrobial peptide was purified from an acidified liver extract of skipjack tuna, Katsuwonus pelamis, by preparative acid-urea-polyacrylamide gel electrophoresis and C18 reversed-phase HPLC. A comparison of the amino acid sequence of the purified peptide with those of other known polypeptides revealed high homology with the C-terminus of hemoglobin β-chain; thus, this peptide was designated as the Skipjack Hemoglobin β chain-related Antimicrobial Peptide (SHβAP). SHβAP showed potent antimicrobial activity against Gram-positive bacteria, such as Bacillus subtilis, Staphylococcus aureus, and Streptococcus iniae (minimal effective concentrations [MECs], 6.5-57.0 μg/mL), Gram-negative bacteria, such as Escherichia coli D31, Pseudomonas aeruginosa, Salmonella enterica, Shigella sonnei, and two Vibrio parahaemolyticus species (MECs, 2.0-19.0 μg/mL), and against Candida albicans (MEC; 12.0 μg/mL) without significant hemolytic activity. Antimicrobial activity of this peptide was heatstable and pH resistant but is sensitive to proteases and salt. SHβAP did not show membrane permeabilization and killing ability. The secondary structural prediction and the homology modeling expected that this peptide formed an amphipathic α-helical structure. This is the first report the purification of a novel antimicrobial peptide related to the C-terminus of hemoglobin β-chain from marine fish.
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Affiliation(s)
- Jung-Kil Seo
- Department of Food Science and Biotechnology, Kunsan National University, Kunsan 573-701, Republic of Korea
| | - Min Jeong Lee
- Department of Biotechnology, Pukyong National University, Busan 608-737, Republic of Korea
| | - Hyun-Gyo Jung
- Department of Biotechnology, Pukyong National University, Busan 608-737, Republic of Korea
| | - Hye-Jin Go
- Department of Biotechnology, Pukyong National University, Busan 608-737, Republic of Korea
| | - Young Ja Kim
- Korea Environmental Industry and Technology Institute, Seoul 122-706, Republic of Korea
| | - Nam Gyu Park
- Department of Biotechnology, Pukyong National University, Busan 608-737, Republic of Korea.
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