101
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Liang Y, Huang Z, Shen X, Zhang Y, Chai Y, Jiang K, Chen Q, Zhao F. Global Trends in Research of Antimicrobial Peptides for the Treatment of Drug-Resistant Bacteria from 1995 to 2021: A Bibliometric Analysis. Infect Drug Resist 2023; 16:4789-4806. [PMID: 37520454 PMCID: PMC10377575 DOI: 10.2147/idr.s411222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Accepted: 06/01/2023] [Indexed: 08/01/2023] Open
Abstract
Background Antimicrobial peptides (AMPs) can act on the bacterial cell membrane to play an antibacterial role in types of drug-resistant bacteria. Therefore, AMPs have attracted more and more attention in the treatment of drug-resistant bacteria. Methods Bibliometric analysis was employed to sort out the development and trends in the research of AMPs in the treatment of drug-resistant bacteria and map the knowledge structure for scholars. Results Since 2010, the publications and citations in this field have exploded, indicating a growing global interest in the field of AMPs for the treatment of drug-resistant bacteria. And as major countries in this field, China and the USA had conducted very in-depth exchanges and cooperation, which had injected a steady stream of impetus into this field. Both old and new scholars have made efforts, and related fields have developed rapidly, especially in the synthesis and improvement of novel AMPs. In recent years, research directions in the field of AMPs for the treatment of drug-resistant bacteria gradually focused on the practical application, optimization of drug delivery mode, optimization of synthesis mode, screening of new AMPs and other fields, indicating that the relevant research results of AMPs for the treatment of drug-resistant bacteria had entered the actual clinical stage, with higher practical significance. Conclusion The research history, global research status, future research hotspots, and trends of the research of AMPs in the treatment of drug-resistant bacteria were discussed in depth in this study, which can provide research references and inspiration for researchers inside and outside the related field.
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Affiliation(s)
- Yuelong Liang
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, People’s Republic of China
| | - Zhengze Huang
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, People’s Republic of China
| | - Xuqiu Shen
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, People’s Republic of China
| | - Yiyin Zhang
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, People’s Republic of China
| | - Yihan Chai
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, People’s Republic of China
| | - Kexin Jiang
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, People’s Republic of China
| | - Qi Chen
- Department of General Surgery, Hangzhou Fuyang Hospital of Traditional Chinese Medicine, Hangzhou, Zhejiang, People’s Republic of China
| | - Feng Zhao
- Department of Clinical Laboratory, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, People’s Republic of China
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102
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Witzany C, Rolff J, Regoes RR, Igler C. The pharmacokinetic-pharmacodynamic modelling framework as a tool to predict drug resistance evolution. MICROBIOLOGY (READING, ENGLAND) 2023; 169:001368. [PMID: 37522891 PMCID: PMC10433423 DOI: 10.1099/mic.0.001368] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 07/12/2023] [Indexed: 08/01/2023]
Abstract
Pharmacokinetic-pharmacodynamic (PKPD) models, which describe how drug concentrations change over time and how that affects pathogen growth, have proven highly valuable in designing optimal drug treatments aimed at bacterial eradication. However, the fast rise of antimicrobial resistance calls for increased focus on an additional treatment optimization criterion: avoidance of resistance evolution. We demonstrate here how coupling PKPD and population genetics models can be used to determine treatment regimens that minimize the potential for antimicrobial resistance evolution. Importantly, the resulting modelling framework enables the assessment of resistance evolution in response to dynamic selection pressures, including changes in antimicrobial concentration and the emergence of adaptive phenotypes. Using antibiotics and antimicrobial peptides as an example, we discuss the empirical evidence and intuition behind individual model parameters. We further suggest several extensions of this framework that allow a more comprehensive and realistic prediction of bacterial escape from antimicrobials through various phenotypic and genetic mechanisms.
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Affiliation(s)
| | - Jens Rolff
- Evolutionary Biology, Institute for Biology, Freie Universität Berlin, Berlin, Germany
| | - Roland R. Regoes
- Institute of Integrative Biology, ETH Zurich, Zurich, Switzerland
| | - Claudia Igler
- Institute of Integrative Biology, ETH Zurich, Zurich, Switzerland
- School of Biological Sciences, University of Manchester, Manchester, UK
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103
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Jakkampudi T, Lin Q, Mitra S, Vijai A, Qin W, Kang A, Chen J, Ryan E, Wang R, Gong Y, Heinrich F, Song J, Di YP(P, Tristram-Nagle S. Lung SPLUNC1 Peptide Derivatives in the Lipid Membrane Headgroup Kill Gram-Negative Planktonic and Biofilm Bacteria. Biomacromolecules 2023; 24:2804-2815. [PMID: 37223955 PMCID: PMC10265666 DOI: 10.1021/acs.biomac.3c00218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 05/03/2023] [Indexed: 05/25/2023]
Abstract
SPLUNC1 (short palate lung and nasal epithelial clone 1) is a multifunctional host defense protein found in human respiratory tract with antimicrobial properties. In this work, we compare the biological activities of four SPLUNC1 antimicrobial peptide (AMP) derivatives using paired clinical isolates of the Gram-negative (G(-)) bacteria Klebsiella pneumoniae, obtained from 11 patients with/without colistin resistance. Secondary structural studies were carried out to study interactions between the AMPs and lipid model membranes (LMMs) utilizing circular dichroism (CD). Two peptides were further characterized using X-ray diffuse scattering (XDS) and neutron reflectivity (NR). A4-153 displayed superior antibacterial activity in both G(-) planktonic cultures and biofilms. NR and XDS revealed that A4-153 (highest activity) is located primarily in membrane headgroups, while A4-198 (lowest activity) is located in hydrophobic interior. CD revealed that A4-153 is helical, while A4-198 has little helical character, demonstrating that helicity and efficacy are correlated in these SPLUNC1 AMPs.
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Affiliation(s)
- Tanvi Jakkampudi
- Biological
Physics, Physics Department, Carnegie Mellon
University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Qiao Lin
- Department
of Environmental and Occupational Health, University of Pittsburgh, 130 DeSoto Street, Pittsburgh, Pennsylvania 15261, United States
| | - Saheli Mitra
- Biological
Physics, Physics Department, Carnegie Mellon
University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Aishwarya Vijai
- Biological
Physics, Physics Department, Carnegie Mellon
University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Weiheng Qin
- Biological
Physics, Physics Department, Carnegie Mellon
University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Ann Kang
- Biological
Physics, Physics Department, Carnegie Mellon
University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Jespar Chen
- Biological
Physics, Physics Department, Carnegie Mellon
University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Emma Ryan
- Biological
Physics, Physics Department, Carnegie Mellon
University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Runxuan Wang
- Biological
Physics, Physics Department, Carnegie Mellon
University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Yuqi Gong
- Biological
Physics, Physics Department, Carnegie Mellon
University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Frank Heinrich
- NIST
Center for Neutron Research, National Institute
of Standards and Technology, 100 Bureau Drive, Gaithersburg, Maryland 20899, United States
| | - Junming Song
- Department
of Environmental and Occupational Health, University of Pittsburgh, 130 DeSoto Street, Pittsburgh, Pennsylvania 15261, United States
| | - Yuan-Pu (Peter) Di
- Department
of Environmental and Occupational Health, University of Pittsburgh, 130 DeSoto Street, Pittsburgh, Pennsylvania 15261, United States
| | - Stephanie Tristram-Nagle
- Biological
Physics, Physics Department, Carnegie Mellon
University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
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104
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Craig A, Ermolovich Y, Cameron A, Rodler A, Wang H, Hawkes JA, Hubert M, Björkling F, Molchanova N, Brimble MA, Moodie LWK, Svenson J. Antimicrobial Peptides Incorporating Halogenated Marine-Derived Amino Acid Substituents. ACS Med Chem Lett 2023; 14:802-809. [PMID: 37312845 PMCID: PMC10258904 DOI: 10.1021/acsmedchemlett.3c00093] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 05/01/2023] [Indexed: 06/15/2023] Open
Abstract
Small synthetic mimics of cationic antimicrobial peptides represent a promising class of compounds with leads in clinical development for the treatment of persistent microbial infections. The activity and selectivity of these compounds rely on a balance between hydrophobic and cationic components, and here, we explore the activity of 19 linear cationic tripeptides against five different pathogenic bacteria and fungi, including clinical isolates. The compounds incorporated modified hydrophobic amino acids inspired by motifs often found in bioactive marine secondary metabolites in combination with different cationic residues to probe the possibility of generating active compounds with improved safety profiles. Several of the compounds displayed high activity (low μM concentrations), comparable with the positive controls AMC-109, amoxicillin, and amphotericin B. A higher activity was observed against the fungal strains, and a low in vitro off-target toxicity was observed against erythrocytes and HeLa cells, thereby illustrating effective means for tuning the activity and selectivity of short antimicrobial peptides.
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Affiliation(s)
- Alexander
J. Craig
- Drug
Design and Discovery, Department of Medicinal Chemistry, Biomedical
Centre, Uppsala University, 75123 Uppsala, Sweden
- Analytical
Chemistry, Department of Chemistry, Biomedical Centre, Uppsala University, 75123 Uppsala, Sweden
| | - Yuri Ermolovich
- Department
of Drug Design and Pharmacology, University
of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Alan Cameron
- School
of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand
| | - Agnes Rodler
- Department
of Pharmacy, Biomedical Centre, Uppsala
University, 75123 Uppsala, Sweden
| | - Helen Wang
- Department
of Medical Biochemistry and Microbiology, Biomedical Centre, Uppsala University, 75123 Uppsala, Sweden
| | - Jeffrey A. Hawkes
- Analytical
Chemistry, Department of Chemistry, Biomedical Centre, Uppsala University, 75123 Uppsala, Sweden
| | - Madlen Hubert
- Department
of Pharmacy, Biomedical Centre, Uppsala
University, 75123 Uppsala, Sweden
| | - Fredrik Björkling
- Department
of Drug Design and Pharmacology, University
of Copenhagen, DK-2100 Copenhagen, Denmark
| | - Natalia Molchanova
- The
Molecular Foundry, Lawrence Berkeley National
Laboratory, Berkeley, California 94720, United States
| | - Margaret A. Brimble
- School
of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland 1010, New Zealand
| | - Lindon W. K. Moodie
- Drug
Design and Discovery, Department of Medicinal Chemistry, Biomedical
Centre, Uppsala University, 75123 Uppsala, Sweden
- Uppsala
Antibiotic Centre, Biomedical Centre, Uppsala
University, 75123 Uppsala, Sweden
| | - Johan Svenson
- Cawthron
Institute, 98 Halifax Street East, Nelson 7010, New Zealand
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105
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Jiao X, Xie J, Du H, Bian X, Wang C, Zhou L, Wen Y. Antibacterial smart absorbent pad with Janus structure for meat preservation. Food Packag Shelf Life 2023. [DOI: 10.1016/j.fpsl.2023.101066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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106
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Chen B, Zhang Z, Zhang Q, Xu N, Lu T, Wang T, Hong W, Fu Z, Penuelas J, Gillings M, Qian H. Antimicrobial Peptides in the Global Microbiome: Biosynthetic Genes and Resistance Determinants. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:7698-7708. [PMID: 37161271 DOI: 10.1021/acs.est.3c01664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Antimicrobial peptides are a promising new class of antimicrobials that could address the antibiotic resistance crisis, which poses a major threat to human health. These peptides are present in all kingdoms of life, but especially in microorganisms, having multiple origins in diverse taxa. To date, there has been no global study on the diversity of antimicrobial peptides, the hosts in which these occur, and the potential for resistance to these agents. Here, we investigated the diversity and number of antimicrobial peptides in four main habitats (aquatic, terrestrial, human, and engineered) by analyzing 52,515 metagenome-assembled genomes. The number of antimicrobial peptides was higher in the human gut microbiome than in other habitats, and most hosts of antimicrobial peptides were habitat-specific. The relative abundance of genes that confer resistance to antimicrobial peptides varied between habitats and was generally low, except for the built environment and on human skin. The horizontal transfer of potential resistance genes among these habitats was probably constrained by ecological barriers. We systematically quantified the risk of each resistance determinant to human health and found that nearly half of them pose a threat, especially those that confer resistance to multiple AMPs and polymyxin B. Our results help identify the biosynthetic potential of antimicrobial peptides in the global microbiome, further identifying peptides with a low risk of developing resistance.
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Affiliation(s)
- Bingfeng Chen
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, P. R. China
| | - Zhenyan Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, P. R. China
| | - Qi Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, P. R. China
| | - Nuohan Xu
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, P. R. China
| | - Tao Lu
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, P. R. China
| | - Tingzhang Wang
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou 310012, P. R. China
| | - Wenjie Hong
- Key Laboratory of Microbial Technology and Bioinformatics of Zhejiang Province, Hangzhou 310012, P. R. China
| | - Zhengwei Fu
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, P. R. China
| | - Josep Penuelas
- CSIC, Global Ecology Unit CREAF-CSIC-UAB, Bellaterra, Barcelona 08193, Catalonia, Spain
- CREAF, Campus Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona 08193, Catalonia, Spain
| | - Michael Gillings
- ARC Centre of Excellence in Synthetic Biology, Faculty of Science and Engineering, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Haifeng Qian
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, P. R. China
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107
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Rončević T, Maleš M, Sonavane Y, Guida F, Pacor S, Tossi A, Zoranić L. Relating Molecular Dynamics Simulations to Functional Activity for Gly-Rich Membranolytic Helical Kiadin Peptides. Pharmaceutics 2023; 15:pharmaceutics15051433. [PMID: 37242675 DOI: 10.3390/pharmaceutics15051433] [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: 03/26/2023] [Revised: 04/27/2023] [Accepted: 04/30/2023] [Indexed: 05/28/2023] Open
Abstract
Kiadins are in silico designed peptides with a strong similarity to diPGLa-H, a tandem sequence of PGLa-H (KIAKVALKAL) and with single, double or quadruple glycine substitutions. They were found to show high variability in their activity and selectivity against Gram-negative and Gram-positive bacteria, as well as cytotoxicity against host cells, which are influenced by the number and placing of glycine residues along the sequence. The conformational flexibility introduced by these substitutions contributes differently peptide structuring and to their interactions with the model membranes, as observed by molecular dynamics simulations. We relate these results to experimentally determined data on the structure of kiadins and their interactions with liposomes having a phospholipid membrane composition similar to simulation membrane models, as well as to their antibacterial and cytotoxic activities, and also discuss the challenges in interpreting these multiscale experiments and understanding why the presence of glycine residues in the sequence affected the antibacterial potency and toxicity towards host cells in a different manner.
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Affiliation(s)
- Tomislav Rončević
- Department of Biology, Faculty of Science, University of Split, 21000 Split, Croatia
| | - Matko Maleš
- Faculty of Maritime Studies, University of Split, 21000 Split, Croatia
| | - Yogesh Sonavane
- Department of Physics, Faculty of Science, University of Split, 21000 Split, Croatia
| | - Filomena Guida
- Department of Life Sciences, University of Trieste, 34127 Trieste, Italy
| | - Sabrina Pacor
- Department of Life Sciences, University of Trieste, 34127 Trieste, Italy
| | - Alessandro Tossi
- Department of Life Sciences, University of Trieste, 34127 Trieste, Italy
| | - Larisa Zoranić
- Department of Physics, Faculty of Science, University of Split, 21000 Split, Croatia
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108
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Zhang C, Liu H, Sun L, Wang Y, Chen X, Du J, Sjöling Å, Yao J, Wu S. An overview of host-derived molecules that interact with gut microbiota. IMETA 2023; 2:e88. [PMID: 38868433 PMCID: PMC10989792 DOI: 10.1002/imt2.88] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 01/17/2023] [Accepted: 01/21/2023] [Indexed: 06/14/2024]
Abstract
The gut microbiota comprises bacteria, archaea, fungi, protists, and viruses that live together and interact with each other and with host cells. A stable gut microbiota is vital for regulating host metabolism and maintaining body health, while a disturbed microbiota may induce different kinds of disease. In addition, diet is also considered to be the main factor that influences the gut microbiota. The host could shape the gut microbiota through other factors. Here, we reviewed the mechanisms that mediate host regulation on gut microbiota, involved in gut-derived molecules, including gut-derived immune system molecules (secretory immunoglobulin A, antimicrobial peptides, cytokines, cluster of differentiation 4+ effector T cell, and innate lymphoid cells), sources related to gut-derived mucosal molecules (carbon sources, nitrogen sources, oxygen sources, and electron respiratory acceptors), gut-derived exosomal noncoding RNA (ncRNAs) (microRNAs, circular RNA, and long ncRNA), and molecules derived from organs other than the gut (estrogen, androgen, neurohormones, bile acid, and lactic acid). This study provides a systemic overview for understanding the interplay between gut microbiota and host, a comprehensive source for potential ways to manipulate gut microbiota, and a solid foundation for future personalized treatment that utilizes gut microbiota.
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Affiliation(s)
- Chenguang Zhang
- College of Animal Science and TechnologyNorthwest A&F UniversityYanglingChina
| | - Huifeng Liu
- College of Animal Science and TechnologyNorthwest A&F UniversityYanglingChina
| | - Lei Sun
- Centre for Translational Microbiome Research, Department of Microbiology, Tumor and Cell BiologyKarolinska InstitutetStockholmSweden
| | - Yue Wang
- College of Animal Science and TechnologyNorthwest A&F UniversityYanglingChina
| | - Xiaodong Chen
- College of Animal Science and TechnologyNorthwest A&F UniversityYanglingChina
| | - Juan Du
- Centre for Translational Microbiome Research, Department of Microbiology, Tumor and Cell BiologyKarolinska InstitutetStockholmSweden
| | - Åsa Sjöling
- Centre for Translational Microbiome Research, Department of Microbiology, Tumor and Cell BiologyKarolinska InstitutetStockholmSweden
| | - Junhu Yao
- College of Animal Science and TechnologyNorthwest A&F UniversityYanglingChina
| | - Shengru Wu
- College of Animal Science and TechnologyNorthwest A&F UniversityYanglingChina
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109
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Cen X, Liu B, Zhang G, Liu H, Yao G, He M, Liu W. Molecular identification of a novel antimicrobial peptide in giant Triton snail Charonia tritonis: mRNA profiles for tissues and its potential antibacterial activity. FISH & SHELLFISH IMMUNOLOGY 2023; 136:108734. [PMID: 37028689 DOI: 10.1016/j.fsi.2023.108734] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 03/29/2023] [Accepted: 04/03/2023] [Indexed: 06/19/2023]
Abstract
Antimicrobial peptides (AMPs) play an important role in innate immunity against microorganisms. AMPs is an effective antibacterial agent, and the chances of causing pathogens to develop is very low. However, there is little information about AMPs in the giant Triton snail Charonia tritonis. In this research, an antimicrobial peptide gene (termed Ct-20534) was identified in C. tritonis. The open reading frame of Ct-20534 is 381 bp in size and it encodes a basic peptide precursor containing 126 amino acids. Ct-20534 gene was found to be expressed in all five tissues examined by real-time fluorescence quantitative PCR (qPCR), but the highest expression was found in the proboscis. This is the first report that antibacterial peptides have been found in C. tritonis, and it has been proved that Ct-20534 has antibacterial activity against Gram-positive bacteria and Gram-negative bacteria, among which the activity of Staphylococcus aureus is most significantly inhibited, this suggests that the newly discovered antimicrobial peptides in C. tritonis may play an important role in the immune system and bacterial resistance of C. tritonis. This study presents the discovery of a newly identified antibacterial peptide from C. tritonis, with its structural properties fully characterized and potent antibacterial activity confirmed. The results provide essential fundamental data for the development of preventive and therapeutic measures against aquatic animal diseases, which in turn can promote the sustainable and stable growth of the aquaculture industry and create economic benefits. Additionally, this research lays the foundation for future development of novel anti-infective drugs.
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Affiliation(s)
- Xitong Cen
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Bing Liu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Gege Zhang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Huiru Liu
- Tianjin Key Laboratory of Aqua-Ecology and Aquaculture, Department of Fishery Sciences, Tianjin Agricultural University, Tianjin, 300384, China
| | - Gaoyou Yao
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Maoxian He
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), 511458, China
| | - Wenguang Liu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), 511458, China.
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110
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Menichetti A, Mavridi-Printezi A, Mordini D, Montalti M. Effect of Size, Shape and Surface Functionalization on the Antibacterial Activity of Silver Nanoparticles. J Funct Biomater 2023; 14:jfb14050244. [PMID: 37233354 DOI: 10.3390/jfb14050244] [Citation(s) in RCA: 41] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/21/2023] [Accepted: 04/23/2023] [Indexed: 05/27/2023] Open
Abstract
Silver nanoparticles (AgNPs) are the most investigated antibacterial agents against multidrug resistant (MDR) pathogens. They can lead to cellular death by means of different mechanisms, damaging several cell compartments, from the external membrane, to enzymes, DNA and proteins; this simultaneous attack amplifies the toxic effect on bacteria with respect to traditional antibiotics. The effectiveness of AgNPs against MDR bacteria is strongly correlated with their chemical and morphological properties, which influence the pathways involved in cellular damage. In this review, AgNPs' size, shape and modification by functional groups or other materials are reported, both to investigate the different synthetic pathways correlated with nanoparticles' modifications and to evaluate the related effect on their antibacterial activity. Indeed, understanding the synthetic conditions for obtaining performing antibacterial AgNPs could help to tailor new and improved silver-based agents to combat multidrug resistance.
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Affiliation(s)
- Arianna Menichetti
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy
| | | | - Dario Mordini
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Marco Montalti
- Department of Chemistry "Giacomo Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy
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111
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Enright TP, Garcia DL, Storti G, Heindl JE, Sidorenko A. Synthesis and Antibiotic Activity of Chitosan-Based Comb-like Co-Polypeptides. Mar Drugs 2023; 21:md21040243. [PMID: 37103382 PMCID: PMC10143536 DOI: 10.3390/md21040243] [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: 03/09/2023] [Revised: 04/04/2023] [Accepted: 04/11/2023] [Indexed: 04/28/2023] Open
Abstract
Infections caused by multidrug-resistant Gram-negative bacteria have been named one of the most urgent global health threats due to antimicrobial resistance. Considerable efforts have been made to develop new antibiotic drugs and investigate the mechanism of resistance. Recently, Anti-Microbial Peptides (AMPs) have served as a paradigm in the design of novel drugs that are active against multidrug-resistant organisms. AMPs are rapid-acting, potent, possess an unusually broad spectrum of activity, and have shown efficacy as topical agents. Unlike traditional therapeutics that interfere with essential bacterial enzymes, AMPs interact with microbial membranes through electrostatic interactions and physically damage cell integrity. However, naturally occurring AMPs have limited selectivity and modest efficacy. Therefore, recent efforts have focused on the development of synthetic AMP analogs with optimal pharmacodynamics and an ideal selectivity profile. Hence, this work explores the development of novel antimicrobial agents which mimic the structure of graft copolymers and mirror the mode of action of AMPs. A family of polymers comprised of chitosan backbone and AMP side chains were synthesized via the ring-opening polymerization of the N-carboxyanhydride of l-lysine and l-leucine. The polymerization was initiated from the functional groups of chitosan. The derivatives with random- and block-copolymer side chains were explored as drug targets. These graft copolymer systems exhibited activity against clinically significant pathogens and disrupted biofilm formation. Our studies highlight the potential of chitosan-graft-polypeptide structures in biomedical applications.
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Affiliation(s)
- Timothy P Enright
- Department of Chemistry and Biochemistry, Saint Joseph's University, Philadelphia, PA 19104, USA
| | - Dominic L Garcia
- Department of Chemistry and Biochemistry, Saint Joseph's University, Philadelphia, PA 19104, USA
| | - Gia Storti
- Department of Chemistry and Biochemistry, Saint Joseph's University, Philadelphia, PA 19104, USA
| | - Jason E Heindl
- Department of Biological & Biomedical Sciences, Rowan University, Glassboro, NJ 08028, USA
| | - Alexander Sidorenko
- Department of Chemistry and Biochemistry, Saint Joseph's University, Philadelphia, PA 19104, USA
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Viana de Freitas T, Karmakar U, Vasconcelos AG, Santos MA, Oliveira do Vale Lira B, Costa SR, Barbosa EA, Cardozo-Fh J, Correa R, Ribeiro DJS, Prates MV, Magalhães KG, Soller Ramada MH, Roberto de Souza Almeida Leite J, Bloch C, Lima de Oliveira A, Vendrell M, Brand GD. Release of immunomodulatory peptides at bacterial membrane interfaces as a novel strategy to fight microorganisms. J Biol Chem 2023; 299:103056. [PMID: 36822328 PMCID: PMC10074799 DOI: 10.1016/j.jbc.2023.103056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 02/18/2023] [Accepted: 02/20/2023] [Indexed: 02/23/2023] Open
Abstract
Cationic and amphiphilic peptides can be used as homing devices to accumulate conjugated antibiotics to bacteria-enriched sites and promote efficient microbial killing. However, just as important as tackling bacterial infections, is the modulation of the immune response in this complex microenvironment. In the present report, we designed a peptide chimaera called Chim2, formed by a membrane-active module, an enzyme hydrolysis site and a formyl peptide receptor 2 (FPR2) agonist. This molecule was designed to adsorb onto bacterial membranes, promote their lysis, and upon hydrolysis by local enzymes, release the FPR2 agonist sequence for activation and recruitment of immune cells. We synthesized the isolated peptide modules of Chim2 and characterized their biological activities independently and as a single polypeptide chain. We conducted antimicrobial assays, along with other tests aiming at the analyses of the cellular and immunological responses. In addition, assays using vesicles as models of eukaryotic and prokaryotic membranes were conducted and solution structures of Chim2 were generated by 1H NMR. Chim2 is antimicrobial, adsorbs preferentially to negatively charged vesicles while adopting an α-helix structure and exposes its disorganized tail to the solvent, which facilitates hydrolysis by tryptase-like enzymes, allowing the release of the FPR2 agonist fragment. This fragment was shown to induce accumulation of the cellular activation marker, lipid bodies, in mouse macrophages and the release of immunomodulatory interleukins. In conclusion, these data demonstrate that peptides with antimicrobial and immunomodulatory activities can be considered for further development as drugs.
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Affiliation(s)
- Thiago Viana de Freitas
- Universidade de Brasília, Instituto de Química, Laboratório de Síntese e Análise de Biomoléculas, LSAB, Brasília, Distrito Federal, Brasil
| | - Utsa Karmakar
- Centre for Inflammation Research, The University of Edinburgh, Edinburgh, UK
| | - Andreanne G Vasconcelos
- Universidade de Brasília, Faculdade de Medicina, Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Brasília, Distrito Federal, Brasil
| | - Michele A Santos
- Universidade de Brasília, Instituto de Química, Laboratório de Síntese e Análise de Biomoléculas, LSAB, Brasília, Distrito Federal, Brasil; Universidade de Brasília, Instituto de Química, Laboratório de Ressonância Magnética Nuclear, LRMN, Brasília, Distrito Federal, Brasil
| | - Bianca Oliveira do Vale Lira
- Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brasil; Programa de Pós-Graduação em Gerontologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brasil
| | - Samuel Ribeiro Costa
- Universidade de Brasília, Instituto de Química, Laboratório de Síntese e Análise de Biomoléculas, LSAB, Brasília, Distrito Federal, Brasil
| | - Eder Alves Barbosa
- Universidade de Brasília, Instituto de Química, Laboratório de Síntese e Análise de Biomoléculas, LSAB, Brasília, Distrito Federal, Brasil
| | - José Cardozo-Fh
- Laboratório de Espectrometria de Massa, LEM, Embrapa Recursos Genéticos e Biotecnologia, Brasília, Distrito Federal, Brasil
| | - Rafael Correa
- Universidade de Brasília, Instituto de Biologia, Laboratório de Imunologia e Inflamação, LIMI, Brasília, Distrito Federal, Brasil
| | - Dalila J S Ribeiro
- Universidade de Brasília, Instituto de Biologia, Laboratório de Imunologia e Inflamação, LIMI, Brasília, Distrito Federal, Brasil
| | - Maura Vianna Prates
- Laboratório de Espectrometria de Massa, LEM, Embrapa Recursos Genéticos e Biotecnologia, Brasília, Distrito Federal, Brasil
| | - Kelly G Magalhães
- Universidade de Brasília, Instituto de Biologia, Laboratório de Imunologia e Inflamação, LIMI, Brasília, Distrito Federal, Brasil
| | - Marcelo Henrique Soller Ramada
- Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brasil; Programa de Pós-Graduação em Gerontologia, Universidade Católica de Brasília, Brasília, Distrito Federal, Brasil
| | - José Roberto de Souza Almeida Leite
- Universidade de Brasília, Faculdade de Medicina, Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Brasília, Distrito Federal, Brasil
| | - Carlos Bloch
- Laboratório de Espectrometria de Massa, LEM, Embrapa Recursos Genéticos e Biotecnologia, Brasília, Distrito Federal, Brasil
| | - Aline Lima de Oliveira
- Universidade de Brasília, Instituto de Química, Laboratório de Ressonância Magnética Nuclear, LRMN, Brasília, Distrito Federal, Brasil
| | - Marc Vendrell
- Centre for Inflammation Research, The University of Edinburgh, Edinburgh, UK
| | - Guilherme Dotto Brand
- Universidade de Brasília, Instituto de Química, Laboratório de Síntese e Análise de Biomoléculas, LSAB, Brasília, Distrito Federal, Brasil.
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113
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Chianese A, Zannella C, Foglia F, Nastri BM, Monti A, Doti N, Franci G, De Filippis A, Galdiero M. Hylin-a1: A Host Defense Peptide with Antibacterial Potential against Staphylococcus aureus Multi-Resistant Strains. Pharmaceuticals (Basel) 2023; 16:ph16040509. [PMID: 37111266 PMCID: PMC10145825 DOI: 10.3390/ph16040509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/24/2023] [Accepted: 03/27/2023] [Indexed: 04/01/2023] Open
Abstract
In recent years, the resistance of pathogenic microorganisms to common antimicrobial agents has raised to a severe public health problem. The moderate and wise use of antimicrobials and the prevention of infections are the most effective strategies for decreasing the spread and development of resistance. Therefore, the World Health Organization (WHO) has intensified the search for new drugs to fight emerging pathogens. Antimicrobial peptides (AMPs), also known as host defense peptides (HDPs), play a crucial role in innate immunity, representing one of the first line of defense against microbial attacks. In this study, we evaluated the antibacterial activity of the AMP named Hylin-a1 (derived from the skin of the frog Heleioporus albopunctatus) against Staphylococcus aureus strains. S. aureus represents a commensal bacterium but also the principal causative agent of several human infections, including bacteremia, endocarditis, skin and device-related infections. Hylin-a1 toxicity was evaluated on human keratinocytes; once the non-cytotoxic concentration range was determined, the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were analyzed, and time-killing assays were performed to verify the bacteriostatic and/or bactericidal activity of the peptide. We found that Hylin-a1 exerted a bacteriostatic action against most of the tested strains, with 90% inhibition at the concentration of 6.25 μM. Noteworthy, the peptide at a very low concentration (~3 μM) significantly blocked the growth of β-lactam- and methicillin-resistant S. aureus. The levels of interleukin (IL)-1β, IL-6 and IL-8 were quantified through a molecular assay, indicating that the peptide was able also to regulate the inflammatory response following bacterial infection. The effect of Hylin-a1 on S. aureus cell morphology was also evaluated. Altogether, these results indicate the high therapeutic potential of Hylin-a1 against a wide variety of clinical manifestations caused by S. aureus.
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114
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Ijaz S, Haq IU, Malik R, Nadeem G, Ali HM, Kaur S. In silico characterization of differentially expressed short-read nucleotide sequences identified in dieback stress-induced transcriptomic analysis reveals their role as antimicrobial peptides. FRONTIERS IN PLANT SCIENCE 2023; 14:1168221. [PMID: 37021314 PMCID: PMC10069654 DOI: 10.3389/fpls.2023.1168221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 03/02/2023] [Indexed: 06/19/2023]
Abstract
We investigated the in silico characterization of short-length nucleotide sequences that were differentially expressed in dieback stress-induced transcriptomic analysis. They displayed homology with C-terminal flanking peptides and defensins-like proteins, revealing their antimicrobial activity. Their predicted fingerprints displayed protein signatures related to antimicrobial peptides. These short-length RGAs have been shown to possess structural motifs such as APLT P-type ATPase, casein kinase II (CK2), protein kinase 3, protein kinase C (PKC), and N-glycosylation site that are the attributes of disease resistance genes. The prediction of arginine and lysine residues in active binding sites in ligand docking analysis prophesied them as antimicrobial peptides due to their strong relation with antimicrobial activity. The in silico structural-functional characterization has predicted their role in resistance against microbial pathogens. Moreover, the predicted antimicrobial peptide regions showed their homology with the signature domain of PR-5-like protein and AMP family Thaumatin.
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Affiliation(s)
- Siddra Ijaz
- Centre of Agricultural Biochemistry and Biotechnology (CABB), University of Agriculture, Faisalabad, Pakistan
| | - Imran Ul Haq
- Department of Plant Pathology, University of Agriculture, Faisalabad, Pakistan
| | - Riffat Malik
- Centre of Agricultural Biochemistry and Biotechnology (CABB), University of Agriculture, Faisalabad, Pakistan
| | - Ghalia Nadeem
- Centre of Agricultural Biochemistry and Biotechnology (CABB), University of Agriculture, Faisalabad, Pakistan
| | - Hayssam M. Ali
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Sukhwinder Kaur
- Department of Plant Pathology, University of California, Davis, Davis, CA, United States
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115
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Glycosylation and Lipidation Strategies: Approaches for Improving Antimicrobial Peptide Efficacy. Pharmaceuticals (Basel) 2023; 16:ph16030439. [PMID: 36986538 PMCID: PMC10059750 DOI: 10.3390/ph16030439] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 03/07/2023] [Accepted: 03/12/2023] [Indexed: 03/17/2023] Open
Abstract
Antimicrobial peptides (AMPs) have recently gained attention as a viable solution for combatting antibiotic resistance due to their numerous advantages, including their broad-spectrum activity, low propensity for inducing resistance, and low cytotoxicity. Unfortunately, their clinical application is limited due to their short half-life and susceptibility to proteolytic cleavage by serum proteases. Indeed, several chemical strategies, such as peptide cyclization, N-methylation, PEGylation, glycosylation, and lipidation, are widely used for overcoming these issues. This review describes how lipidation and glycosylation are commonly used to increase AMPs’ efficacy and engineer novel AMP-based delivery systems. The glycosylation of AMPs, which involves the conjugation of sugar moieties such as glucose and N-acetyl galactosamine, modulates their pharmacokinetic and pharmacodynamic properties, improves their antimicrobial activity, and reduces their interaction with mammalian cells, thereby increasing selectivity toward bacterial membranes. In the same way, lipidation of AMPs, which involves the covalent addition of fatty acids, has a significant impact on their therapeutic index by influencing their physicochemical properties and interaction with bacterial and mammalian membranes. This review highlights the possibility of using glycosylation and lipidation strategies to increase the efficacy and activity of conventional AMPs.
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116
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Aria H, Rezaei M. Immunogenic cell death inducer peptides: A new approach for cancer therapy, current status and future perspectives. Biomed Pharmacother 2023; 161:114503. [PMID: 36921539 DOI: 10.1016/j.biopha.2023.114503] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/23/2023] [Accepted: 03/07/2023] [Indexed: 03/14/2023] Open
Abstract
Immunogenic Cell Death (ICD) is a type of cell death that kills tumor cells by stimulating the adaptive immune response against other tumor cells. ICD depends on the endoplasmic reticulum (ER) stress and the secretion of Damage-Associated Molecular Patterns (DAMP) by the dying tumor cell. DAMPs recruit innate immune cells such as Dendritic Cells (DC), triggering a cancer-specific immune response such as cytotoxic T lymphocytes (CTLs) to eliminate remaining cancer cells. ICD is accompanied by several hallmarks in dying cells, such as surface translocation of ER chaperones, calreticulin (CALR), and extracellular secretion of DAMPs such as high mobility group protein B1 (HMGB1) and adenosine triphosphate (ATP). Therapeutic peptides can kill bacteria and tumor cells thus affecting the immune system. They have high specificity and affinity for their targets, small size, appropriate cell membrane penetration, short half-life, and simple production processes. Peptides are interesting agents for immunomodulation since they may overcome the limitations of other therapeutics. Thus, the development of peptides affecting the TME and active antitumoral immunity has been actively pursued. On the other hand, several peptides have been recently identified to trigger ICD and anti-cancer responses. In the present review, we review previous studies on peptide-induced ICD, their mechanism, their targets, and markers. They include anti-microbial peptides (AMPs), cationic or mitochondrial targeting, checkpoint inhibitors, antiapoptotic inhibitors, and "don't eat me" inhibitor peptides. Also, peptides will be investigated potentially inducing ICD that is divided into ER stressors, ATPase inhibitors, and anti-microbial peptides.
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Affiliation(s)
- Hamid Aria
- Department of Immunology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Marzieh Rezaei
- Department of Immunology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
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117
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Wang G, Cui Y, Liu H, Tian Y, Li S, Fan Y, Sun S, Wu D, Peng C. Antibacterial peptides-loaded bioactive materials for the treatment of bone infection. Colloids Surf B Biointerfaces 2023; 225:113255. [PMID: 36924650 DOI: 10.1016/j.colsurfb.2023.113255] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 02/20/2023] [Accepted: 03/06/2023] [Indexed: 03/13/2023]
Abstract
Bacterial bone infection in open fractures is an urgent problem to solve in orthopedics. Antimicrobial peptides (AMPs), as a part of innate immune defense, have good biocompatibility. Their antibacterial mechanism and therapeutic application against bacteria have been widely studied. Compared with traditional antibiotics, AMPs do not easily cause bacterial resistance and can be a reliable substitute for antibiotics in the future. Therefore, various physical and chemical strategies have been developed for the combined application of AMPs and bioactive materials to infected sites, which are conducive to maintaining the local stability of AMPs, reducing many complications, and facilitating bone infection resolution. This review explored the molecular structure, function, and direct and indirect antibacterial mechanisms of AMPs, introduced two important AMPs (LL-37 and β-defensins) in bone tissues, and reviewed advanced AMP loading strategies and different bioactive materials. Finally, the latest progress and future development of AMPs-loaded bioactive materials for the promotion of bone infection repair were discussed. This study provided a theoretical basis and application strategy for the treatment of bone infection with AMP-loaded bioactive materials.
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Affiliation(s)
- Gan Wang
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun 130041, PR China
| | - Yutao Cui
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun 130041, PR China
| | - He Liu
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun 130041, PR China
| | - Yuhang Tian
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun 130041, PR China
| | - Shaorong Li
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun 130041, PR China
| | - Yi Fan
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun 130041, PR China
| | - Shouye Sun
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun 130041, PR China
| | - Dankai Wu
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun 130041, PR China.
| | - Chuangang Peng
- Orthopaedic Medical Center, The Second Hospital of Jilin University, Changchun 130041, PR China.
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118
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Anselmo S, Sancataldo G, Baiamonte C, Pizzolanti G, Vetri V. Transportan 10 Induces Perturbation and Pores Formation in Giant Plasma Membrane Vesicles Derived from Cancer Liver Cells. Biomolecules 2023; 13:biom13030492. [PMID: 36979427 PMCID: PMC10046094 DOI: 10.3390/biom13030492] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 03/02/2023] [Accepted: 03/04/2023] [Indexed: 03/30/2023] Open
Abstract
Continuous progress has been made in the development of new molecules for therapeutic purposes. This is driven by the need to address several challenges such as molecular instability and biocompatibility, difficulties in crossing the plasma membrane, and the development of host resistance. In this context, cell-penetrating peptides (CPPs) constitute a promising tool for the development of new therapies due to their intrinsic ability to deliver therapeutic molecules to cells and tissues. These short peptides have gained increasing attention for applications in drug delivery as well as for their antimicrobial and anticancer activity but the general rules regulating the events involved in cellular uptake and in the following processes are still unclear. Here, we use fluorescence microscopy methods to analyze the interactions between the multifunctional peptide Transportan 10 (TP10) and the giant plasma membrane vesicles (GPMVs) derived from cancer cells. This aims to highlight the molecular mechanisms underlying functional interactions which bring its translocation across the membrane or cytotoxic mechanisms leading to membrane collapse and disruption. The Fluorescence Lifetime Imaging Microscopy (FLIM) method coupled with the phasor approach analysis proved to be the winning choice for following highly dynamic spatially heterogeneous events in real-time and highlighting aspects of such complex phenomena. Thanks to the presented approach, we were able to identify and monitor TP10 translocation into the lumen, internalization, and membrane-induced modifications depending on the peptide concentration regime.
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Affiliation(s)
- Sara Anselmo
- Dipartimento di Fisica e Chimica-Emilio Segré, Università degli Studi di Palermo, 90128 Palermo, Italy
| | - Giuseppe Sancataldo
- Dipartimento di Fisica e Chimica-Emilio Segré, Università degli Studi di Palermo, 90128 Palermo, Italy
| | - Concetta Baiamonte
- Dipartimento di Scienze e Tecnologie Biologiche Chimiche e Farmaceutiche, Università degli Studi di Palermo, 90128 Palermo, Italy
- AteN Center-Advanced Technologies Network Center, Università degli Studi di Palermo, 90128 Palermo, Italy
| | - Giuseppe Pizzolanti
- AteN Center-Advanced Technologies Network Center, Università degli Studi di Palermo, 90128 Palermo, Italy
- Dipartimento di Promozione della Salute, Materno-Infantile, di Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro", Università degli Studi di Palermo, 90127 Palermo, Italy
| | - Valeria Vetri
- Dipartimento di Fisica e Chimica-Emilio Segré, Università degli Studi di Palermo, 90128 Palermo, Italy
- AteN Center-Advanced Technologies Network Center, Università degli Studi di Palermo, 90128 Palermo, Italy
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119
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Yeh JC, Hazam PK, Hsieh CY, Hsu PH, Lin WC, Chen YR, Li CC, Chen JY. Rational Design of Stapled Antimicrobial Peptides to Enhance Stability and In Vivo Potency against Polymicrobial Sepsis. Microbiol Spectr 2023; 11:e0385322. [PMID: 36877022 PMCID: PMC10101059 DOI: 10.1128/spectrum.03853-22] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 02/17/2023] [Indexed: 03/07/2023] Open
Abstract
In this work, we sought to develop a TP4-based stapled peptide that can be used to counter polymicrobial sepsis. First, we segregated the TP4 sequence into hydrophobic and cationic/hydrophilic zones and substituted the preferred residue, lysine, as the sole cationic amino acid. These modifications minimized the intensity of cationic or hydrophobic characteristics within small segments. Then, we incorporated single or multiple staples into the peptide chain, bracketing the cationic/hydrophilic segments to improve pharmacological suitability. Using this approach, we were able to develop an AMP with low toxicity and notable in vivo efficacy. IMPORTANCE In our in vitro studies, one dual stapled peptide out of the series of candidates (TP4-3: FIIXKKSXGLFKKKAGAXKKKXIKK) showed significant activity, low toxicity, and high stability (in 50% human serum). When tested in cecal ligation and puncture (CLP) mouse models of polymicrobial sepsis, TP4-3 improved survival (87.5% on day 7). Furthermore, TP4-3 enhanced the activity of meropenem against polymicrobial sepsis (100% survival on day 7) compared to meropenem alone (37.5% survival on day 7). Molecules such as TP4-3 may be well suited for a wide variety of clinical applications.
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Affiliation(s)
- Jih-Chao Yeh
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, Jiaushi, Ilan, Taiwan
| | - Prakash Kishore Hazam
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, Jiaushi, Ilan, Taiwan
| | - Chu-Yi Hsieh
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, Jiaushi, Ilan, Taiwan
| | - Po-Hsien Hsu
- Institute of Fisheries Science, National Taiwan University, Taipei, Taiwan
| | - Wen-Chun Lin
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, Jiaushi, Ilan, Taiwan
| | - Yun-Ru Chen
- Academia Sinica Protein Clinic, Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Chao-Chin Li
- Institute of Cellular and Organismic Biology, Academia Sinica, Nankang, Taipei, Taiwan
| | - Jyh-Yih Chen
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, Jiaushi, Ilan, Taiwan
- The iEGG and Animal Biotechnology Center and the Rong Hsing Research Center for Translational Medicine, National Chung Hsing University, Taichung, Taiwan
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120
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Hazam PK, Cheng CC, Lin WC, Hsieh CY, Hsu PH, Chen YR, Li CC, Hsueh PR, Chen JY. Strategic modification of low-activity natural antimicrobial peptides confers antibacterial potential in vitro and in vivo. Eur J Med Chem 2023; 249:115131. [PMID: 36669399 DOI: 10.1016/j.ejmech.2023.115131] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 01/09/2023] [Accepted: 01/15/2023] [Indexed: 01/19/2023]
Abstract
Antimicrobial peptides (AMPs) show great promise for clinical applications, but the utility of naturally occurring AMPs is often limited by their stability. Here, we used a rational design approach to improve the characteristics of a pair of inactive peptides, tilapia piscidin 1 and 2 (TP1 and TP2). From each starting peptide, we generated a series of novel derivatives by substituting residues to adjust cationic charge density, percent hydrophobicity and hydrophilicity/hydrophobicity coefficients. This approach yielded a novel peptide, TP2-5 (KKCIAKAILKKAKKLLKKLVNP), that exhibits significant bactericidal potency, low cytotoxicity and high stability. The designed peptide further showed antibiofilm activity, rapid antibacterial action and a low capacity to induce bacterial resistance. Importantly, we also demonstrated that TP2-5 can protect mice in a Vibrio vulnificus-infected wound model. Therefore, our peptide modification strategy successfully generated a novel AMP with high potential for future clinical application.
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Affiliation(s)
- Prakash Kishore Hazam
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, 23-10, Dahuen Rd., Jiaushi, Ilan, 262, Taiwan
| | - Chih-Cheng Cheng
- Institute of Fisheries Science, National Taiwan University, 1 Roosevelt Road, Sec. 4, Taipei, 106, Taiwan
| | - Wen-Chun Lin
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, 23-10, Dahuen Rd., Jiaushi, Ilan, 262, Taiwan
| | - Chu-Yi Hsieh
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, 23-10, Dahuen Rd., Jiaushi, Ilan, 262, Taiwan
| | - Po-Hsien Hsu
- Institute of Fisheries Science, National Taiwan University, 1 Roosevelt Road, Sec. 4, Taipei, 106, Taiwan
| | - Yun-Ru Chen
- Academia Sinica Protein Clinic, Institute of Biological Chemistry, Academia Sinica, 128, Academia Road, Section 2, Nankang District, Taipei, 115, Taiwan
| | - Chao-Chin Li
- Institute of Cellular and Organismic Biology, Academia Sinica, Nankang, Taipei, 115, Taiwan
| | - Po-Ren Hsueh
- Departments of Laboratory Medicine and Internal Medicine, China Medical University Hospital, School of Medicine, China Medical University, Taichung, Taiwan; PhD Program for Aging, School of Medicine, China Medical University, Taichung, Taiwan; Departments of Laboratory Medicine and Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Jyh-Yih Chen
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, 23-10, Dahuen Rd., Jiaushi, Ilan, 262, Taiwan; The iEGG and Animal Biotechnology Center and the Rong Hsing Research Center for Translational Medicine, National Chung Hsing University, Taichung, 402, Taiwan.
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121
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Development of a Novel Antibacterial Peptide, PAM-5, via Combination of Phage Display Selection and Computer-Assisted Modification. Biomolecules 2023; 13:biom13030466. [PMID: 36979401 PMCID: PMC10046784 DOI: 10.3390/biom13030466] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 02/14/2023] [Accepted: 02/20/2023] [Indexed: 03/06/2023] Open
Abstract
Antibacterial peptides (ABPs) have been proposed as potential candidates for alternative antibacterial agents due to the extensive dissemination of antibiotic resistance. However, ABP isolation from natural resources can be tedious without consistent yield. Moreover, many natural ABPs are not developed for clinical application due to potential toxicity to mammalian cells. Therefore, the objective of this study was to develop a potent ABP with minimal toxicity via phage display selection followed by computer-assisted modification. Briefly, a 12-mer phage-displayed peptide library was used to isolate peptides that bound to the cell surface of Pseudomonas aeruginosa with high affinity. The affinity-selected peptide with the highest selection frequency was modified to PAM-5 (KWKWRPLKRKLVLRM) with enhanced antibacterial features by using an online peptide database. Using in vitro microbroth dilution assay, PAM-5 was shown to be active against a panel of Gram-negative bacteria and selected Gram-positive bacteria. Interestingly, the peptide was stable in human plasma by exhibiting a similar bactericidal effect via ex vivo assay. Scanning electron microscopy and SYTOX Green uptake assay revealed that PAM-5 was able to cause membrane disruption and permeabilization of the bacteria. Additionally, the peptide was also able to bind to bacterial DNA as demonstrated by gel retardation assay. In the time-kill assay, PAM-5 was shown to kill the bacteria rapidly in 10 min. More importantly, PAM-5 was non-cytotoxic to Vero cells and non-haemolytic to human erythrocytes at all concentrations tested for the antibacterial assays. Thus, this study showed that the combination of phage display screening and computer-assisted modification could be used to develop potent novel ABPs, and PAM-5 derived from these approaches is worth to be further elucidated for its potential clinical use.
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Huang Z, Dong W, Fan J, Tian Y, Huang A, Wang X. Tandem mass tag-based proteomics technology provides insights into multi-targeted mechanism of peptide MOp2 from Moringa oleifera seeds against Staphylococcus aureus. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
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Wang Y, Zhu G, Wang W, Zhang Y, Zhu Y, Wang J, Geng M, Lu H, Chen Y, Zhou M, Chen J, Zhang F, Yang J, Cheng X. Rational design of HJH antimicrobial peptides to improve antimicrobial activity. Bioorg Med Chem Lett 2023; 83:129176. [PMID: 36764469 DOI: 10.1016/j.bmcl.2023.129176] [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: 01/02/2023] [Revised: 02/01/2023] [Accepted: 02/05/2023] [Indexed: 02/11/2023]
Abstract
Antimicrobial peptides (AMPs) have attracted considerable interest in the past decade due to their advantages for tackling antibiotic resistance. They exhibit potential antimicrobial activity through unique cell membrane destruction mechanism based on their net charge, hydrophobic properties, and α-helix. In this work, a series of HJH peptides was rationally designed and synthesized. The antimicrobial activity and cytotoxicity assays indicated that HJH-5 and HJH-6 containing hydrophobic residues and helices displayed prominent antimicrobial activity and mild cytotoxicity, respectively. These peptides may be developed for combatting microbial infections.
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Affiliation(s)
- Yiming Wang
- Anhui Engineering Laboratory for Medicinal and Food Homologous Natural Resources Exploration, Hefei Normal University, Hefei 230601, China
| | - Guilan Zhu
- Anhui Engineering Laboratory for Medicinal and Food Homologous Natural Resources Exploration, Hefei Normal University, Hefei 230601, China
| | - Wei Wang
- Anhui Engineering Laboratory for Medicinal and Food Homologous Natural Resources Exploration, Hefei Normal University, Hefei 230601, China
| | - Yan Zhang
- Anhui Engineering Laboratory for Medicinal and Food Homologous Natural Resources Exploration, Hefei Normal University, Hefei 230601, China
| | - Yong Zhu
- Anhui Engineering Laboratory for Medicinal and Food Homologous Natural Resources Exploration, Hefei Normal University, Hefei 230601, China
| | - Jingjing Wang
- Anhui Engineering Laboratory for Medicinal and Food Homologous Natural Resources Exploration, Hefei Normal University, Hefei 230601, China
| | - Ming Geng
- Anhui Engineering Laboratory for Medicinal and Food Homologous Natural Resources Exploration, Hefei Normal University, Hefei 230601, China
| | - Hongxia Lu
- Anhui Engineering Laboratory for Medicinal and Food Homologous Natural Resources Exploration, Hefei Normal University, Hefei 230601, China
| | - Yajun Chen
- Anhui Engineering Laboratory for Medicinal and Food Homologous Natural Resources Exploration, Hefei Normal University, Hefei 230601, China
| | - Minghui Zhou
- Anhui Engineering Laboratory for Medicinal and Food Homologous Natural Resources Exploration, Hefei Normal University, Hefei 230601, China
| | - Jing Chen
- Anhui Engineering Laboratory for Medicinal and Food Homologous Natural Resources Exploration, Hefei Normal University, Hefei 230601, China
| | - Fangyan Zhang
- Anhui Engineering Laboratory for Medicinal and Food Homologous Natural Resources Exploration, Hefei Normal University, Hefei 230601, China
| | - Junjie Yang
- Anhui Engineering Laboratory for Medicinal and Food Homologous Natural Resources Exploration, Hefei Normal University, Hefei 230601, China
| | - Xiaozhong Cheng
- Anhui Engineering Laboratory for Medicinal and Food Homologous Natural Resources Exploration, Hefei Normal University, Hefei 230601, China.
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Feng J, Jia Z, Yuan G, Zhu X, Liu Q, Wu K, Wang J, Zou J. Expression and functional characterization of three β-defensins in grass carp (Ctenopharyngodon idella). DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2023; 140:104616. [PMID: 36565823 DOI: 10.1016/j.dci.2022.104616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 12/07/2022] [Accepted: 12/11/2022] [Indexed: 06/17/2023]
Abstract
β-defensins (BDs) are a group of cysteine-rich cationic antimicrobial peptides and play important roles in the first line of defense against infection. In this study, the expression and antibacterial activities of three grass carp (Ctenopharyngodon idella) (Ci) β-defensin (BD) peptides were comparatively investigated. Expression analysis reveals that CiBD1-3 were constitutively expressed in tissues, with the highest expression detected in the skin. The CiBD-1 transcripts were more abundant than CiBD-2 and CiBD-3. In the primary head kidney leukocytes, CiBDs were induced by PHA, LPS, poly(I:C) and cytokines such as IL-1β and IFN-γ. In vivo challenge of fish with Aeromonas hydrophila resulted in the up-regulation of CiBDs in the head kidney and hindgut. To determine the biological activities, recombinant CiBD proteins were produced in the HEK293-F cells and purified for the minimum inhibitory concentration assay. It was found that all three recombinant CiBD proteins were effective to inhibit the growth of Gram-negative fish bacterial pathogens including Aeromonas hydrophila, Edwardsiella tarda, Flavobacterium columnare and Klebsiella pneumoniae and Gram-positive Staphylococcus aureus. CiBD-2 and CiBD-3 were more effective than CiBD-1. Our results demonstrate that all the three CiBDs have broad antibacterial activity against fish bacterial pathogens.
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Affiliation(s)
- Jianhua Feng
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China; International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, 201306, China
| | - Zhao Jia
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China; International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, 201306, China
| | - Gaoliang Yuan
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China; International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, 201306, China
| | - Xiaozhen Zhu
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China; International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, 201306, China
| | - Qin Liu
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China; International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, 201306, China
| | - Kaizheng Wu
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China; International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, 201306, China
| | - Junya Wang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China; International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, 201306, China
| | - Jun Zou
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China; International Research Center for Marine Biosciences, Ministry of Science and Technology, Shanghai Ocean University, Shanghai, 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai, 201306, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266200, China.
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125
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Terán M, Osorio J, Cardoso E, Tejería E, Paolino A, Reyes AL, Cecchetto G. [ 99m Tc]Tc-HYNIC-EcgDf21: A defensin short analogue with potential application in infection foci imaging. Chem Biol Drug Des 2023; 101:593-604. [PMID: 36138520 DOI: 10.1111/cbdd.14149] [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: 02/24/2022] [Revised: 08/24/2022] [Accepted: 09/19/2022] [Indexed: 11/30/2022]
Abstract
Opportunistic infections are a problem of great relevance in public health and the precise detection and localization of infection in the early stages of the disease is of great importance for patient management as well as cost containment. Our proposal seeks to contribute to developing a new agent that meets the needs of diagnosis and follow-up of fungal and bacterial infections, focused on the design of a radiotracer with the potential for recognition of hidden infection foci. Defensins are plant antimicrobial peptides that not only show activity against plant pathogens but also against human ones. A short analogue of EcgDf1 defensin, EcgDf21d (NH2 -ERFTGGHCRGFRRRCFCTKHC-COOH), was labelled through the formation of a 99m Tc-HYNIC complex which was assessed for physicochemical and biological behaviour both in vitro and in vivo. The [99m Tc]Tc-HYNIC-EcgDf21 labelling procedure rendered a single product with remarkably high RCP and stability in the labelling milieu. The Log p value indicated that [99m Tc]Tc-HYNIC-EcgDf21 has a hydrophilic behaviour, confirmed by the biodistribution profiles. The optimal uptake value was obtained for Candida albicans infection model reaching a lesion/muscle ratio of 3, this correlates with in vitro binding studies, and the lesion can be definitely observed in the scintigraphic images.
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Affiliation(s)
- Mariella Terán
- Área de Radioquímica, Departamento Estrella Campos, Facultad de Química, Universidad de la República (Udelar), Montevideo, Uruguay
| | - Jessica Osorio
- Área de Radioquímica, Departamento Estrella Campos, Facultad de Química, Universidad de la República (Udelar), Montevideo, Uruguay
| | - Elena Cardoso
- Área de Radioquímica, Departamento Estrella Campos, Facultad de Química, Universidad de la República (Udelar), Montevideo, Uruguay
| | - Emilia Tejería
- Área de Radioquímica, Departamento Estrella Campos, Facultad de Química, Universidad de la República (Udelar), Montevideo, Uruguay
| | - Andrea Paolino
- Centro Uruguayo de Imagenología Molecular (CUDIM), Montevideo, Uruguay
| | - Ana Laura Reyes
- Centro Uruguayo de Imagenología Molecular (CUDIM), Montevideo, Uruguay
| | - Gianna Cecchetto
- Área de Microbiología, Instituto de Química Biológica, Facultad de Ciencias-Departamento de Biociencias, Facultad de Química, Universidad de la República (Udelar), Montevideo, Uruguay
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126
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Wang X, Yang X, Wang Q, Meng D. Unnatural amino acids: promising implications for the development of new antimicrobial peptides. Crit Rev Microbiol 2023; 49:231-255. [PMID: 35254957 DOI: 10.1080/1040841x.2022.2047008] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The increasing incidence and rapid spread of bacterial resistance to conventional antibiotics are a serious global threat to public health, highlighting the need to develop new antimicrobial alternatives. Antimicrobial peptides (AMPs) represent a class of promising natural antibiotic candidates due to their broad-spectrum activity and low tendency to induce resistance. However, the development of AMPs for medical use is hampered by several obstacles, such as moderate activity, lability to proteolytic degradation, and low bioavailability. To date, many researchers have focussed on the optimization or design of novel artificial AMPs with desired properties. Unnatural amino acids (UAAs) are valuable building blocks in the manufacture of a variety of pharmaceuticals, and have been used to develop artificial AMPs with specific structural and physicochemical properties. Rational incorporation of UAAs has become a very promising approach to endow AMPs with strong and long-lasting activity but no toxicity. This review aims to summarize key approaches that have been used to incorporate UAAs to develop novel AMPs with improved properties and better performance. It is anticipated that this review will guide future design considerations for UAA-based antimicrobial applications.
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Affiliation(s)
- Xiuhong Wang
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin, People's Republic of China
| | - Xiaomin Yang
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin, People's Republic of China
| | - Qiaoe Wang
- Key Laboratory of Cosmetic, China National Light Industry, Beijing Technology and Business University, Beijing, People's Republic of China
| | - Demei Meng
- State Key Laboratory of Food Nutrition and Safety, College of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin, People's Republic of China.,Tianjin Gasin-DH Preservation Technology Co., Ltd, Tianjin, People's Republic of China
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127
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Billah MM, Or Rashid MM, Ahmed M, Yamazaki M. Antimicrobial peptide magainin 2-induced rupture of single giant unilamellar vesicles comprising E. coli polar lipids. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2023; 1865:184112. [PMID: 36567034 DOI: 10.1016/j.bbamem.2022.184112] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 12/05/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022]
Abstract
Most antimicrobial peptides (AMPs) damage the cell membrane of bacterial cells and induce rapid leakage of the internal cell contents, which is a main cause of their bactericidal activity. One of the AMPs, magainin 2 (Mag), forms nanopores in giant unilamellar vesicles (GUVs) comprising phosphatidylcholine (PC) and phosphatidylglycerol (PG), inducing leakage of fluorescent probes. In this study, to elucidate the Mag-induced pore formation in lipid bilayer region in E. coli cell membrane, we examined the interaction of Mag with single GUVs comprising E. coli polar lipids (E. coli-lipid-GUVs). First, we investigated the Mag-induced leakage of a fluorescent probe AF488 from single E. coli-lipid-GUVs, and found that Mag caused rupture of GUVs, inducing rapid AF488 leakage. The rate constant of Mag-induced GUV rupture increased with the Mag concentration. Using fluorescence microscopy with a time resolution of 5 ms, we revealed the GUV rupture process: first, a small micropore was observed in the GUV membrane, then the pore radius increased within 50 ms without changing the GUV diameter, the thickness of the membrane at the pore rim concomitantly increased, and eventually membrane aggregates were formed. Mag bound to only the outer monolayer of the GUV before GUV rupture, which increased the area of the GUV bilayer. We also examined the physical properties of E. coli-lipid-GUVs themselves. We found that the rate constant of the constant tension-induced rupture of E. coli-lipid-GUVs was higher than that of PG/PC-GUVs. Based on these results, we discussed the Mag-induced rupture of E. coli-lipid-GUVs and its mechanism.
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Affiliation(s)
- Md Masum Billah
- Integrated Bioscience Section, Graduate School of Science and Technology, Shizuoka University, Shizuoka 422-8529, Japan
| | - Md Mamun Or Rashid
- Integrated Bioscience Section, Graduate School of Science and Technology, Shizuoka University, Shizuoka 422-8529, Japan
| | - Marzuk Ahmed
- Integrated Bioscience Section, Graduate School of Science and Technology, Shizuoka University, Shizuoka 422-8529, Japan
| | - Masahito Yamazaki
- Integrated Bioscience Section, Graduate School of Science and Technology, Shizuoka University, Shizuoka 422-8529, Japan; Nanomaterials Research Division, Research Institute of Electronics, Shizuoka University, Shizuoka 422-8529, Japan; Department of Physics, Faculty of Science, Shizuoka University, Shizuoka 422-8529, Japan.
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128
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Duque HM, Rodrigues G, Santos LS, Franco OL. The biological role of charge distribution in linear antimicrobial peptides. Expert Opin Drug Discov 2023; 18:287-302. [PMID: 36720196 DOI: 10.1080/17460441.2023.2173736] [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] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Antimicrobial peptides (AMP) have received particular attention due to their capacity to kill bacteria. Although much is known about them, peptides are currently being further researched. A large number of AMPs have been discovered, but only a few have been approved for topical use, due to their promiscuity and other challenges, which need to be overcome. AREAS COVERED AMPs are diverse in structure. Consequently, they have varied action mechanisms when targeting microorganisms or eukaryotic cells. Herein, the authors focus on linear peptides, particularly those that are alpha-helical structured, and examine how their charge distribution and hydrophobic amino acids could modulate their biological activity. EXPERT OPINION The world currently needs urgent solutions to the infective problems caused by resistant pathogens. In order to start the race for antimicrobial development from the charge distribution viewpoint, bioinformatic tools will be necessary. Currently, there is no software available that allows to discriminate charge distribution in AMPs and predicts the biological effects of this event. Furthermore, there is no software available that predicts the side-chain length of residues and its role in biological functions. More specialized software is necessary.
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Affiliation(s)
- Harry Morales Duque
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, PC: (CEP) 70.790-160, Brasília-DF, Brazil
| | - Gisele Rodrigues
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, PC: (CEP) 70.790-160, Brasília-DF, Brazil
| | - Lucas Souza Santos
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, PC: (CEP) 70.790-160, Brasília-DF, Brazil
| | - Octávio Luiz Franco
- Centro de Análises Proteômicas e Bioquímicas, Programa de Pós-Graduação em Ciências Genômicas e Biotecnologia, Universidade Católica de Brasília, PC: (CEP) 70.790-160, Brasília-DF, Brazil.,S-inova Biotech, Programa de Pós-Graduação em Biotecnologia, Universidade Católica Dom Bosco, PC: (CEP) 79117-010, Campo Grande-MS, Brazil
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129
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Li Y, Wang Q, Qu X, Zhang Q, Zhang X. A metalloporphyrin and hydantoin functionalized nanozyme with synergistically enhanced bacterial inhibition. Biomater Sci 2023; 11:1785-1796. [PMID: 36648752 DOI: 10.1039/d2bm01337a] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
An elaborate design of multimodal antibacterial agents has been revealed to be a promising strategy to address bacterial resistance, originating from the abuse of antibiotics. In this work, we have developed a positively charged and porous material, FePPOPHydantoin, as a disinfectant via introducing 1,3-dibromo-5,5-dimethylhydantoin (Hydantoin) and porphyrin iron units into a polymer framework. The extended π conjugated networks of FePPOPHydantoin endowed the material with strong near-infrared (NIR) absorption, high density of surface catalytic active centers, superior stability, and reproducibility. FePPOPHydantoin exhibits high peroxidase mimetic and photo-Fenton activity, which can catalyze the biologically allowable maximum concentrations of hydrogen peroxide (100 μM) to produce a vast amount of hydroxyl radicals. Simultaneously, the effective electrostatic interaction between the positively charged FePPOPHydantoin and the negatively charged bacteria facilitates the binding of FePPOPHydantoin on the bacterial membrane, restricting bacteria within the destruction range of hydroxyl radicals and thus making the bacteria more vulnerable. Finally, further close contact between bacteria and Hydantoin units in FePPOPHydantoin gave the material an antibacterial efficiency of over 99.999%. Compared with chemical therapy, photo-Fenton therapy, or peroxidase catalytic therapy alone, FePPOPHydantoin had a noteworthy multi-amplified antibacterial efficiency. Furthermore, FePPOPHydantoin exhibited good biocompatibility and negligible cytotoxicity. The in vivo antibacterial therapy on the Staphylococcus aureus (S. aureus) infected mouse wound model clearly proved the effectiveness of FePPOPHydantoin for fighting bacterial infections. This work highlights opportunities for the design of nanozymes with enhanced bacteriostatic activity, providing a new avenue for the construction of novel antibiotics.
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Affiliation(s)
- Yanhong Li
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China.
| | - Quanbo Wang
- School of Pharmaceutical Sciences, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.
| | - Xinyan Qu
- School of Pharmaceutical Sciences, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.
| | - Qiang Zhang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China.
| | - Xiaomei Zhang
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China.
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130
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Won T, Mohid SA, Choi J, Kim M, Krishnamoorthy J, Biswas I, Bhunia A, Lee D. The role of hydrophobic patches of de novo designed MSI-78 and VG16KRKP antimicrobial peptides on fragmenting model bilayer membranes. Biophys Chem 2023; 296:106981. [PMID: 36871366 DOI: 10.1016/j.bpc.2023.106981] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/06/2023] [Accepted: 02/21/2023] [Indexed: 02/26/2023]
Abstract
Antimicrobial peptides (AMPs) with cell membrane lysing capability are considered potential candidates for the development of the next generation of antibiotics. Designing novel AMPs requires an in-depth understanding of the mechanism of action of the peptides. In this work, we used various biophysical techniques including 31P solid-state NMR to examine the interaction of model membranes with amphipathic de novo-designed peptides. Two such peptides, MSI-78 and VG16KRKP, were designed with different hydrophobicity and positive charges. The model lipid membranes were constituted by mixing lipids of varying degrees of 'area per lipid' (APL), which directly affected the packing properties of the membrane. The observed emergence of the isotropic peak in 31P NMR spectra as a function of time is a consequence of the fragmentation of the membrane mediated by the peptide interaction. The factors such as the charges, overall hydrophilicity of the AMPs, as well as lipid membrane packing, contributed to the kinetics of membrane fragmentation. Furthermore, we anticipate the designed AMPs follow the carpet and toroidal pore mechanisms when lysing the cell membrane. This study highlights the significance of the effect of the overall charges and the hydrophobicity of the novel AMPs designed for antimicrobial activity.
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Affiliation(s)
- TaeJun Won
- Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
| | - Sk Abdul Mohid
- Department of Biophysics, Bose Institute, Unified Academic Campus, Bidhan Nagar EN 80, Kolkata 700 091, India
| | - JiHye Choi
- Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
| | - MinSoo Kim
- Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
| | | | - Indranil Biswas
- Department of Microbiology, Molecular Genetics, and Immunology, University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - Anirban Bhunia
- Department of Biophysics, Bose Institute, Unified Academic Campus, Bidhan Nagar EN 80, Kolkata 700 091, India.
| | - DongKuk Lee
- Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea.
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131
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Identification and Characterization of a Novel Cathelicidin from Hydrophis cyanocinctus with Antimicrobial and Anti-Inflammatory Activity. Molecules 2023; 28:molecules28052082. [PMID: 36903328 PMCID: PMC10004598 DOI: 10.3390/molecules28052082] [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: 01/29/2023] [Revised: 02/21/2023] [Accepted: 02/21/2023] [Indexed: 02/25/2023] Open
Abstract
The abuse of antibiotics and lack of new antibacterial drugs has led to the emergence of superbugs that raise fears of untreatable infections. The Cathelicidin family of antimicrobial peptide (AMP) with varying antibacterial activities and safety is considered to be a promising alternative to conventional antibiotics. In this study, we investigated a novel Cathelicidin peptide named Hydrostatin-AMP2 from the sea snake Hydrophis cyanocinctus. The peptide was identified based on gene functional annotation of the H. cyanocinctus genome and bioinformatic prediction. Hydrostatin-AMP2 showed excellent antimicrobial activity against both Gram-positive and Gram-negative bacteria, including standard and clinical Ampicillin-resistant strains. The results of the bacterial killing kinetic assay demonstrated that Hydrostatin-AMP2 had faster antimicrobial action than Ampicillin. Meanwhile, Hydrostatin-AMP2 exhibited significant anti-biofilm activity including inhibition and eradication. It also showed a low propensity to induce resistance as well as low cytotoxicity and hemolytic activity. Notably, Hydrostatin-AMP2 apparently decreased the production of pro-inflammatory cytokines in the LPS-induced RAW264.7 cell model. To sum up, these findings indicate that Hydrostatin-AMP2 is a potential peptide candidate for the development of new-generation antimicrobial drugs fighting against antibiotic-resistant bacterial infections.
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132
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Ditsawanon T, Phaonakrob N, Roytrakul S. Mechanisms of Antimicrobial Peptides from Bagasse against Human Pathogenic Bacteria. Antibiotics (Basel) 2023; 12:antibiotics12030448. [PMID: 36978315 PMCID: PMC10044114 DOI: 10.3390/antibiotics12030448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 02/18/2023] [Accepted: 02/21/2023] [Indexed: 03/30/2023] Open
Abstract
Nonedible agricultural wastes (agricultural wastes, agro-industrial wastes, and fishery wastes) were chosen as potential sources of antimicrobial peptides and evaluated for antibacterial efficiency against human pathogens. Specifically, protein hydrolysates were first obtained by hydrolysis with pepsin. Filtrated peptides smaller than 3 kDa were then purified by C18 reversed-phase chromatography, cation exchange chromatography, and off-gel fractionation. NanoLC-MS/MS was used to investigate the amino acid sequences of active peptide candidates. Five candidate peptides were finally chosen for chemical synthesis and evaluation of growth inhibition against human pathogenic bacteria. Two synthetic peptides from bagasse, NLWSNEINQDMAEF (Asn-Leu-Trp-Ser-Asn-Glu-Ile-Asn-Gln-Asp-Met-Ala-Glu-Phe) and VSNCL (Val-Ser-Asn-Cys-Leu), showed the most potent antibacterial activity against three pathogens: Pseudomonas aeruginosa, Bacillus subtilis, and Burkholderia cepacia. The antibacterial mechanisms of these peptides were then examined using shotgun proteomics, which revealed their effects to involve both intracellular-active and membrane-active mechanisms. Further investigation and modification of peptides are needed to increase the efficiency of these peptides against human pathogens.
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Affiliation(s)
- Thitiporn Ditsawanon
- Faculty of Science and Technology, Rajabhat Rajanagarindra University, Chachoengsao 24000, Thailand
| | - Narumon Phaonakrob
- Functional Proteomics Technology Laboratory, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathum Thani 12120, Thailand
| | - Sittiruk Roytrakul
- Functional Proteomics Technology Laboratory, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathum Thani 12120, Thailand
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133
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Anju MV, Archana K, Anooja VV, Athira PP, Neelima S, Singh ISB, Philip R. A novel anti-lipopolysaccharide factor from blue swimmer crab Portunus pelagicus and its cytotoxic effect on the prokaryotic expression host, E. coli on heterologous expression. J Genet Eng Biotechnol 2023; 21:22. [PMID: 36805357 PMCID: PMC9941410 DOI: 10.1186/s43141-023-00478-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 02/04/2023] [Indexed: 02/22/2023]
Abstract
BACKGROUND Invertebrates like crabs employ their own immune systems to fight against a number of invasive infections. Anti-lipopolysaccharide factors (ALFs) are an important class of antimicrobial peptides (AMPs) exhibiting binding and neutralizing activities against lipopolysaccharides. RESULTS This study identified and characterized a novel homolog of ALF (Pp-ALF) from the blue swimmer crab Portunus pelagicus. Pp-ALF has a 369bp open-reading frame encoding a protein with 123 amino acids. The deduced protein featured an LPS-binding domain and a signal peptide. The predicted tertiary structure of Pp-ALF contains three α helices packed against four β sheets. The deduced amino acid sequence of Pp-ALF had a net positive charge of +10.75 and an isoelectric point of 9.8. Phylogenetic analysis revealed that Pp-ALF has a strong ancestral relationship with crab ALFs. CONCLUSION Antibacterial, antiviral, antifungal, anticancer, and antibiofilm activities of Pp-ALF could be revealed by in silico prediction tools. Recombinant expression of Pp-ALF was unsuccessful in the Escherichia coli Rosetta-gami expression system due to the cytotoxic effect of the peptide to the host. The toxic effect of Pp-ALF to the host was displayed by membrane permeabilization and death of the host cells by fluorescent staining with Syto9-Propidium Iodide and CTC-DAPI- FITC.
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Affiliation(s)
- M V Anju
- Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Fine Arts Avenue, Kochi, Kerala, 682016, India
| | - K Archana
- Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Fine Arts Avenue, Kochi, Kerala, 682016, India
| | - V V Anooja
- Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Fine Arts Avenue, Kochi, Kerala, 682016, India
| | - P P Athira
- Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Fine Arts Avenue, Kochi, Kerala, 682016, India
| | - S Neelima
- Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Fine Arts Avenue, Kochi, Kerala, 682016, India
| | - I S Bright Singh
- National Centre for Aquatic Animal Health, Cochin University of Science and Technology, Kochi, Kerala, 682016, India
| | - Rosamma Philip
- Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, Cochin University of Science and Technology, Fine Arts Avenue, Kochi, Kerala, 682016, India.
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134
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You Y, Liu H, Zhu Y, Zheng H. Rational design of stapled antimicrobial peptides. Amino Acids 2023; 55:421-442. [PMID: 36781451 DOI: 10.1007/s00726-023-03245-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Accepted: 01/30/2023] [Indexed: 02/15/2023]
Abstract
The global increase in antimicrobial drug resistance has dramatically reduced the effectiveness of traditional antibiotics. Structurally diverse antibiotics are urgently needed to combat multiple-resistant bacterial infections. As part of innate immunity, antimicrobial peptides have been recognized as the most promising candidates because they comprise diverse sequences and mechanisms of action and have a relatively low induction rate of resistance. However, because of their low chemical stability, susceptibility to proteases, and high hemolytic effect, their usage is subject to many restrictions. Chemical modifications such as D-amino acid substitution, cyclization, and unnatural amino acid modification have been used to improve the stability of antimicrobial peptides for decades. Among them, a side-chain covalent bridge modification, the so-called stapled peptide, has attracted much attention. The stapled side-chain bridge stabilizes the secondary structure, induces protease resistance, and increases cell penetration and biological activity. Recent progress in computer-aided drug design and artificial intelligence methods has also been used in the design of stapled antimicrobial peptides and has led to the successful discovery of many prospective peptides. This article reviews the possible structure-activity relationships of stapled antimicrobial peptides, the physicochemical properties that influence their activity (such as net charge, hydrophobicity, helicity, and dipole moment), and computer-aided methods of stapled peptide design. Antimicrobial peptides under clinical trial: Pexiganan (NCT01594762, 2012-05-07). Omiganan (NCT02576847, 2015-10-13).
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Affiliation(s)
- YuHao You
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - HongYu Liu
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - YouZhuo Zhu
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, People's Republic of China
| | - Heng Zheng
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, People's Republic of China.
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135
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Kamal I, Ashfaq UA, Hayat S, Aslam B, Sarfraz MH, Yaseen H, Rajoka MSR, Shah AA, Khurshid M. Prospects of antimicrobial peptides as an alternative to chemical preservatives for food safety. Biotechnol Lett 2023; 45:137-162. [PMID: 36504266 DOI: 10.1007/s10529-022-03328-w] [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: 04/05/2022] [Revised: 11/10/2022] [Accepted: 11/17/2022] [Indexed: 12/14/2022]
Abstract
Antimicrobial peptides (AMPs) are a potential alternative to antimicrobial agents that have got considerable research interest owing to their significant role in the inhibition of bacterial pathogens. These AMPs can essentially inhibit the growth and multiplication of microbes through multiple mechanisms including disruption of cellular membranes, inhibition of cell wall biosynthesis, or affecting intracellular components and cell division. Moreover, AMPs are biocompatible and biodegradable therefore, they can be a good alternative to antimicrobial agents and chemical preservatives. A few of their features for example thermostability and high selectivity are quite appealing for their potential use in the food industry for food preservation to prevent the spoilage caused by microorganisms and foodborne pathogens. Despite these advantages, very few AMPs are being used at an industrial scale for food preservation as these peptides are quite vulnerable to external environmental factors which deter their practical applications and commercialization. The review aims to provide an outline of the mechanism of action of AMPs and their prospects as an alternative to chemical preservatives in the food industry. Further studies related to the structure-activity relationship of AMPs will help to expand the understanding of their mechanism of action and to determine specific conditions to increase their stability and applicability in food preservation.
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Affiliation(s)
- Iqra Kamal
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Usman Ali Ashfaq
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Sumreen Hayat
- Department of Microbiology, Government College University, Faisalabad, Pakistan
| | - Bilal Aslam
- Department of Microbiology, Government College University, Faisalabad, Pakistan
| | | | - Hamna Yaseen
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Muhammad Shahid Riaz Rajoka
- Laboratory of Animal Food Function, Graduate School of Agricultural Science, Tohoku University, Sendai, 980-8572, Japan
| | - Asad Ali Shah
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan.
| | - Mohsin Khurshid
- Department of Microbiology, Government College University, Faisalabad, Pakistan.
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136
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Luo X, Chen H, Song Y, Qin Z, Xu L, He N, Tan Y, Dessie W. Advancements, challenges and future perspectives on peptide-based drugs: Focus on antimicrobial peptides. Eur J Pharm Sci 2023; 181:106363. [PMID: 36529161 DOI: 10.1016/j.ejps.2022.106363] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 12/13/2022] [Accepted: 12/15/2022] [Indexed: 12/23/2022]
Abstract
Among other health related issues, the rising concerns on drug resistance led to look for alternative pharmaceutical drugs that are effective both against infectious and noninfectious diseases. Antimicrobial peptides (AMPs) emerged as potential therapeutic molecule with wide range of applications. With their limitations, AMPs have gained reputable attentions in research as well as in the pharmaceutical industry. This review highlighted the historical background, research trends, technological advancements, challenges, and future perspectives in the development and applications of peptide drugs. Some vital questions related with the need for pharmaceutical production, factors for the slow and steady journey, the importance of oral bioavailability, and the drug resistance possibilities of AMPs were raised and addressed accordingly. Therefore, the current study is believed to provide a profound understanding in the past and current scenarios and future directions on the therapeutic impacts of peptide drugs.
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Affiliation(s)
- Xiaofang Luo
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, Hunan University of Technology, Zhuzhou 412007, China; Hunan Engineering Technology Research Center for Comprehensive Development and Utilization of Biomass Resources, College of Chemistry and Bioengineering, Hunan University of Science and Engineering, 425199 Yongzhou, China
| | - Huifang Chen
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, Hunan University of Technology, Zhuzhou 412007, China; Hunan Engineering Technology Research Center for Comprehensive Development and Utilization of Biomass Resources, College of Chemistry and Bioengineering, Hunan University of Science and Engineering, 425199 Yongzhou, China
| | - Yannan Song
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, Hunan University of Technology, Zhuzhou 412007, China; Hunan Engineering Technology Research Center for Comprehensive Development and Utilization of Biomass Resources, College of Chemistry and Bioengineering, Hunan University of Science and Engineering, 425199 Yongzhou, China
| | - Zuodong Qin
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, Hunan University of Technology, Zhuzhou 412007, China; Hunan Engineering Technology Research Center for Comprehensive Development and Utilization of Biomass Resources, College of Chemistry and Bioengineering, Hunan University of Science and Engineering, 425199 Yongzhou, China
| | - Lijian Xu
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, Hunan University of Technology, Zhuzhou 412007, China
| | - Nongyue He
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, Hunan University of Technology, Zhuzhou 412007, China
| | - Yimin Tan
- Hunan Key Laboratory of Biomedical Nanomaterials and Devices, Hunan University of Technology, Zhuzhou 412007, China.
| | - Wubliker Dessie
- Hunan Engineering Technology Research Center for Comprehensive Development and Utilization of Biomass Resources, College of Chemistry and Bioengineering, Hunan University of Science and Engineering, 425199 Yongzhou, China.
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137
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Jung B, Yun H, Min HJ, Yang S, Shin SY, Lee CW. Discovery of structural and functional transition sites for membrane-penetrating activity of sheep myeloid antimicrobial peptide-18. Sci Rep 2023; 13:1238. [PMID: 36690720 PMCID: PMC9871035 DOI: 10.1038/s41598-023-28386-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Accepted: 01/18/2023] [Indexed: 01/24/2023] Open
Abstract
Cathelicidin antimicrobial peptides have an extended and/or unstructured conformation in aqueous solutions but fold into ordered conformations, such as the α-helical structure, when interacting with cellular membranes. These structural transitions can be directly correlated to their antimicrobial activity and its underlying mechanisms. SMAP-18, the N-terminal segment (residues 1-18) of sheep cathelicidin (SMAP-29), is known to kill microorganisms by translocating across membranes and interacting with their nucleic acids. The amino acid sequence of SMAP-18 contains three Gly residues (at positions 2, 7, and 13) that significantly affect the flexibility of its peptide structure. This study investigated the role of Gly residues in the structure, membrane interaction, membrane translocation, and antimicrobial mechanisms of SMAP-18. Five analogs were designed and synthesized through Gly → Ala substitution (i.e., G2A, G7A, G13A, G7,13A, and G2,7,13A); these substitutions altered the helical content of SMAP-18 peptides. We found that G7,13A and G2,7,13A changed their mode of action, with circular dichroism and nuclear magnetic resonance studies revealing that these analogs changed the structure of SMAP-18 from a random coil to an α-helical structure. The results of this experiment suggest that the Gly residues at positions 7 and 13 in SMAP-18 are the structural and functional determinants that control its three-dimensional structure, strain-specific activity, and antimicrobial mechanism of action. These results provide valuable information for the design of novel peptide-based antibiotics.
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Affiliation(s)
- Bomi Jung
- Department of Chemistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Hyosuk Yun
- Department of Chemistry, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Hye Jung Min
- Department of Cosmetic Science, Gwangju Women's University, Gwangju, 62396, Republic of Korea
| | - Sungtae Yang
- Department of Microbiology, School of Medicine, Chosun University, Gwangju, 61452, Republic of Korea
| | - Song Yub Shin
- Department of Cellular and Molecular Medicine, School of Medicine, Chosun University, Gwangju, 61452, Republic of Korea.
| | - Chul Won Lee
- Department of Chemistry, Chonnam National University, Gwangju, 61186, Republic of Korea.
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138
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Morbiato L, Haneen DSA, Formaggio F, De Zotti M. Total synthesis of the natural, medium-length, peptaibol pentadecaibin and study of the chemical features responsible for its membrane activity. J Pept Sci 2023:e3479. [PMID: 36652104 DOI: 10.1002/psc.3479] [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: 11/25/2022] [Revised: 01/11/2023] [Accepted: 01/13/2023] [Indexed: 01/19/2023]
Abstract
Peptaibols are naturally occurring, antimicrobial peptides endowed with well-defined helical conformations and resistance to proteolysis. Both features stem from the presence in their sequence of several, Cα -tetrasubstituted, α-aminoisobutyric acid (Aib) residues. Peptaibols interact with biological membranes, usually causing their leakage. All of the peptaibol-membrane interaction mechanisms proposed so far begin with peptide aggregation or accumulation. The long-length alamethicin, the most studied peptaibol, acts by forming pores in the membranes. Conversely, the carpet mechanism has been claimed for short-length peptaibols, such as trichogin. The mechanism of medium-length peptaibols is far less studied, and this is partly due to the difficulties of their synthesis. They are believed to perturb membrane permeability in different ways, depending on the membrane properties. The present work focuses on pentadecaibin, a recently discovered, medium-length peptaibol. In contrast to the majority of its family members, its sequence does not comprise hydroxyprolines or prolines, and its helix is not kinked. A reliable and effective synthesis procedure is described that allowed us to produce also two shorter analogs. By a combination of techniques, we were able to establish a 3D-structure-activity relationship. In particular, the membrane activity of pentadecaibin heavily depends on the presence of three consecutive Aib residues that are responsible for the clear, albeit modest, amphiphilic character of its helix. The shortest analog, devoid of two of these three Aib residues, preserves a well-defined helical conformation, but not its amphipathicity, and loses almost completely the ability to cause membrane leakage. We conclude that pentadecaibin amphiphilicity is probably needed for the peptide ability to perturb model membranes.
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Affiliation(s)
- Laura Morbiato
- Department of Chemical Sciences, University of Padova, Padova, Italy
| | - David S A Haneen
- Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Abbassia, 11566, Egypt
| | - Fernando Formaggio
- Department of Chemical Sciences, University of Padova, Padova, Italy.,Padova Unit, CNR Institute of Biomolecular Chemistry, University of Padova, Padova, Italy
| | - Marta De Zotti
- Department of Chemical Sciences, University of Padova, Padova, Italy.,Padova Unit, CNR Institute of Biomolecular Chemistry, University of Padova, Padova, Italy
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139
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Wu F, Song L, Gong Y, Wang Y, Li H, Zhang S. Antimicrobial Peptide Pt5‐1c Promotes Keratinocyte Migration and Proliferation via EGFR‐mediated Akt/MAPK/STAT3 pathways. ChemistrySelect 2023. [DOI: 10.1002/slct.202203707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Fei Wu
- Department of Marine Biology, Institute of Evolution & Marine Biodiversity Ocean University of China Qingdao 266003 China
| | - Lili Song
- Department of Marine Biology, Institute of Evolution & Marine Biodiversity Ocean University of China Qingdao 266003 China
| | - Yi Gong
- Department of Marine Biology, Institute of Evolution & Marine Biodiversity Ocean University of China Qingdao 266003 China
| | - Yubing Wang
- School of life science and technology Weifang Medical University Weifang 261053 China
| | - Hongyan Li
- Department of Marine Biology, Institute of Evolution & Marine Biodiversity Ocean University of China Qingdao 266003 China
| | - Shicui Zhang
- Department of Marine Biology, Institute of Evolution & Marine Biodiversity Ocean University of China Qingdao 266003 China
- Laboratory for Marine Biology and Biotechnology Pilot National Laboratory for Marine Science and Technology (Qingdao) Qingdao 266003 China
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140
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Ali DA, Domínguez Mercado L, Findlay BL, Badia A, DeWolf C. Opposites Attract: Electrostatically Driven Loading of Antimicrobial Peptides into Phytoglycogen Nanocarriers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:53-63. [PMID: 36525622 DOI: 10.1021/acs.langmuir.2c01794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Antimicrobial peptides, such as GL13K, have a high binding selectivity toward bacterial membranes, while not affecting healthy mammalian cells at therapeutic concentrations. However, delivery of these peptides is challenging since they are susceptible to proteolytic hydrolysis and exhibit poor cellular uptake. A protective nanocarrier is thus proposed to overcome these obstacles. We investigate the potential to employ biodegradable phytoglycogen nanoparticles as carriers for GL13K using a simple loading protocol based on electrostatic association rather than chemical conjugation, eliminating the need for control of chemical cleavage for release of the peptide in situ. Both the native (quasi-neutral) and carboxymethylated (anionic) phytoglycogen were evaluated for their colloidal stability, loading capacity, and release characteristics. We show that the anionic nanophytoglycogen carries a greater cationic GL13K load and exhibits slower release kinetics than native nanophytoglycogen. Isotope exchange measurements demonstrate that the antimicrobial peptide is entrapped in the pores of the dendritic-like macromolecule, which should provide the necessary protection for delivery. Importantly, the nanoformulations are active against a Pseudomonas aeruginosa clinical isolate at concentrations comparable to those of the free peptide and representative, small molecule antibiotics. The colloidal nanocarrier preserves peptide stability and antimicrobial activity, even after long periods of storage (at least 8 months).
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Affiliation(s)
- Dalia A Ali
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QuebecH4B 1R6, Canada
- Centre for NanoScience Research, Concordia University, Montreal, QuebecH4B 1R6, Canada
- FRQNT Centre Québécois sur les Matériaux Fonctionnels─Quebec Centre for Advanced Materials, McGill University, 845 Sherbrooke Street West, Montréal, QuebecH3A 0G4, Canada
- Faculty of Pharmacy, Alexandria University, Alexandria5424041, Egypt
| | - Laura Domínguez Mercado
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QuebecH4B 1R6, Canada
| | - Brandon L Findlay
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QuebecH4B 1R6, Canada
| | - Antonella Badia
- FRQNT Centre Québécois sur les Matériaux Fonctionnels─Quebec Centre for Advanced Materials, McGill University, 845 Sherbrooke Street West, Montréal, QuebecH3A 0G4, Canada
- Département de Chimie, Université de Montréal, Complexe des sciences, C.P. 6128, succursale Centre-ville, Montréal, QuebecH3C 3J7, Canada
| | - Christine DeWolf
- Department of Chemistry and Biochemistry, Concordia University, Montreal, QuebecH4B 1R6, Canada
- Centre for NanoScience Research, Concordia University, Montreal, QuebecH4B 1R6, Canada
- FRQNT Centre Québécois sur les Matériaux Fonctionnels─Quebec Centre for Advanced Materials, McGill University, 845 Sherbrooke Street West, Montréal, QuebecH3A 0G4, Canada
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141
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McDonald EF, Jones T, Plate L, Meiler J, Gulsevin A. Benchmarking AlphaFold2 on peptide structure prediction. Structure 2023; 31:111-119.e2. [PMID: 36525975 PMCID: PMC9883802 DOI: 10.1016/j.str.2022.11.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 10/15/2022] [Accepted: 11/18/2022] [Indexed: 12/23/2022]
Abstract
Recent advancements in computational tools have allowed protein structure prediction with high accuracy. Computational prediction methods have been used for modeling many soluble and membrane proteins, but the performance of these methods in modeling peptide structures has not yet been systematically investigated. We benchmarked the accuracy of AlphaFold2 in predicting 588 peptide structures between 10 and 40 amino acids using experimentally determined NMR structures as reference. Our results showed AlphaFold2 predicts α-helical, β-hairpin, and disulfide-rich peptides with high accuracy. AlphaFold2 performed at least as well if not better than alternative methods developed specifically for peptide structure prediction. AlphaFold2 showed several shortcomings in predicting Φ/Ψ angles, disulfide bond patterns, and the lowest RMSD structures failed to correlate with lowest pLDDT ranked structures. In summary, computation can be a powerful tool to predict peptide structures, but additional steps may be necessary to analyze and validate the results.
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Affiliation(s)
- Eli Fritz McDonald
- Department of Chemistry, Vanderbilt University, Nashville, TN 37212, USA; Center for Structural Biology, Vanderbilt University, Nashville, TN 37212, USA
| | - Taylor Jones
- Department of Chemistry, Vanderbilt University, Nashville, TN 37212, USA; Center for Structural Biology, Vanderbilt University, Nashville, TN 37212, USA
| | - Lars Plate
- Department of Chemistry, Vanderbilt University, Nashville, TN 37212, USA; Department of Biological Sciences, Vanderbilt University, Nashville, TN 37212, USA
| | - Jens Meiler
- Department of Chemistry, Vanderbilt University, Nashville, TN 37212, USA; Center for Structural Biology, Vanderbilt University, Nashville, TN 37212, USA; Institute for Drug Discovery, Leipzig University Medical School, 04103 Leipzig, Germany.
| | - Alican Gulsevin
- Department of Chemistry, Vanderbilt University, Nashville, TN 37212, USA; Center for Structural Biology, Vanderbilt University, Nashville, TN 37212, USA.
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142
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Silva PSE, Guindo AS, Oliveira PHC, de Moraes LFRN, Boleti APDA, Ferreira MA, de Oliveira CFR, Macedo MLR, Rossato L, Simionatto S, Migliolo L. Evaluation of the Synthetic Multifunctional Peptide Hp-MAP3 Derivative of Temporin-PTa. Toxins (Basel) 2023; 15:42. [PMID: 36668862 PMCID: PMC9866994 DOI: 10.3390/toxins15010042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 10/07/2022] [Accepted: 10/11/2022] [Indexed: 01/06/2023] Open
Abstract
In recent years, antimicrobial peptides isolated from amphibian toxins have gained attention as new multifunctional drugs interacting with different molecular targets. We aimed to rationally design a new peptide from temporin-PTa. Hp-MAP3 (NH2-LLKKVLALLKKVL-COOH), net charge (+4), hydrophobicity (0.69), the content of hydrophobic residues (69%), and hydrophobic moment (0.73). For the construction of the analog peptide, the physicochemical characteristics were reorganized into hydrophilic and hydrophobic residues with the addition of lysines and leucines. The minimum inhibitory concentration was 2.7 to 43 μM against the growth of Gram-negative and positive bacteria, and the potential for biofilm eradication was 173.2 μM. Within 20 min, the peptide Hp-MAP3 (10.8 μM) prompted 100% of the damage to E. coli cells. At 43.3 μM, eliminated 100% of S. aureus within 5 min. The effects against yeast species of the Candida genus ranged from 5.4 to 86.6 μM. Hp-MAP3 presents cytotoxic activity against tumor HeLa at a concentration of 21.6 μM with an IC50 of 10.4 µM. Furthermore, the peptide showed hemolytic activity against murine erythrocytes. Structural studies carried out by circular dichroism showed that Hp-MAP3, while in the presence of 50% trifluoroethanol or SDS, an α-helix secondary structure. Finally, Amphipathic Hp-MAP3 building an important model for the design of new multifunctional molecules.
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Affiliation(s)
- Patrícia Souza e Silva
- S-Inova Biotech, Postgraduate Program in Biotechnology, Universidade Católica Dom Bosco, Campo Grande 79117-900, Mato Grosso do Sul, Brazil
| | - Alexya Sandim Guindo
- S-Inova Biotech, Postgraduate Program in Biotechnology, Universidade Católica Dom Bosco, Campo Grande 79117-900, Mato Grosso do Sul, Brazil
| | - Pedro Henrique Cardoso Oliveira
- S-Inova Biotech, Postgraduate Program in Biotechnology, Universidade Católica Dom Bosco, Campo Grande 79117-900, Mato Grosso do Sul, Brazil
| | | | - Ana Paula de Araújo Boleti
- S-Inova Biotech, Postgraduate Program in Biotechnology, Universidade Católica Dom Bosco, Campo Grande 79117-900, Mato Grosso do Sul, Brazil
| | - Marcos Antonio Ferreira
- S-Inova Biotech, Postgraduate Program in Biotechnology, Universidade Católica Dom Bosco, Campo Grande 79117-900, Mato Grosso do Sul, Brazil
| | - Caio Fernando Ramalho de Oliveira
- Laboratório de Purificação de Proteínas e suas Funções Biológicas, Unidade de Tecnologia de Alimentos e da Saúde Pública, Universidade Federal de Mato Grosso do Sul, Campo Grande 79070-900, Mato Grosso do Sul, Brazil
| | - Maria Ligia Rodrigues Macedo
- Laboratório de Purificação de Proteínas e suas Funções Biológicas, Unidade de Tecnologia de Alimentos e da Saúde Pública, Universidade Federal de Mato Grosso do Sul, Campo Grande 79070-900, Mato Grosso do Sul, Brazil
| | - Luana Rossato
- Laboratório de Pesquisa em Ciências da Saúde, Universidade Federal da Grande Dourados UFGD, Dourados 79825-070, Mato Grosso do Sul, Brazil
| | - Simone Simionatto
- Laboratório de Pesquisa em Ciências da Saúde, Universidade Federal da Grande Dourados UFGD, Dourados 79825-070, Mato Grosso do Sul, Brazil
| | - Ludovico Migliolo
- S-Inova Biotech, Postgraduate Program in Biotechnology, Universidade Católica Dom Bosco, Campo Grande 79117-900, Mato Grosso do Sul, Brazil
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143
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Humphrey M, Abdelmesseh Nekhala I, Scheinpflug K, Krylova O, Schäfer AB, Buttress JA, Wenzel M, Strahl H. Tracking Global and Local Changes in Membrane Fluidity Through Fluorescence Spectroscopy and Microscopy. Methods Mol Biol 2023; 2601:203-229. [PMID: 36445586 DOI: 10.1007/978-1-0716-2855-3_11] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Membrane fluidity is a critical parameter of cellular membranes, which cells continuously strive to maintain within a viable range. Interference with the correct membrane fluidity state can strongly inhibit cell function. Triggered changes in membrane fluidity and associated impacts on lipid domains have been postulated to contribute to the mechanism of action of membrane targeting antimicrobials, but the corresponding analyses have been hampered by the absence of readily available analytical tools. Here, we expand upon the protocols outlined in the first edition of this book, providing further and alternative protocols that can be used to measure changes in membrane fluidity. We provide detailed protocols, which allow straightforward in vivo and in vitro measurement of antibiotic compound-triggered changes in membrane fluidity and fluid membrane microdomains. Furthermore, we summarize useful strains constructed by us and others to characterize and confirm lipid specificity of membrane antimicrobials directly in vivo.
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Affiliation(s)
- Madeleine Humphrey
- Centre for Bacterial Cell Biology, Biosciences Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Ireny Abdelmesseh Nekhala
- Division of Chemical Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Kathi Scheinpflug
- Department of Chemical Biology, Leibniz-Institut für Molekulare Pharmakologie (FMP), Berlin, Germany
| | - Oxana Krylova
- Department of Chemical Biology, Leibniz-Institut für Molekulare Pharmakologie (FMP), Berlin, Germany
| | - Ann-Britt Schäfer
- Division of Chemical Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Jessica A Buttress
- Centre for Bacterial Cell Biology, Biosciences Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Michaela Wenzel
- Division of Chemical Biology, Department of Biology and Biological Engineering, Chalmers University of Technology, Gothenburg, Sweden.
| | - Henrik Strahl
- Centre for Bacterial Cell Biology, Biosciences Institute, Newcastle University, Newcastle upon Tyne, UK.
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Wang X, Du Z, Chen C, Guo S, Mao Q, Wu W, Wu R, Han W, Xie P, Zeng Y, Shan W, Wang Z, Yu X. Antifungal effects and biocontrol potential of lipopeptide-producing Streptomyces against banana Fusarium wilt fungus Fusarium oxysporum f. sp. cubense. Front Microbiol 2023; 14:1177393. [PMID: 37180271 PMCID: PMC10172682 DOI: 10.3389/fmicb.2023.1177393] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 04/10/2023] [Indexed: 05/16/2023] Open
Abstract
Fusarium wilt of banana (FWB), caused by Fusarium oxysporum f. sp. cubense (Foc), especially tropical race 4 (TR4), presents the foremost menace to the global banana production. Extensive efforts have been made to search for efficient biological control agents for disease management. Our previous study showed that Streptomyces sp. XY006 exhibited a strong inhibitory activity against several phytopathogenic fungi, including F. oxysporum. Here, the corresponding antifungal metabolites were purified and determined to be two cyclic lipopeptide homologs, lipopeptin A and lipopeptin B. Combined treatment with lipopeptin complex antagonized Foc TR4 by inhibiting mycelial growth and conidial sporulation, suppressing the synthesis of ergosterol and fatty acids and lowering the production of fusaric acid. Electron microscopy observation showed that lipopeptide treatment induced a severe disruption of the plasma membrane, leading to cell leakage. Lipopeptin A displayed a more pronounced antifungal activity against Foc TR4 than lipopeptin B. In pot experiments, strain XY006 successfully colonized banana plantlets and suppressed the incidence of FWB, with a biocontrol efficacy of up to 87.7%. Additionally, XY006 fermentation culture application improved plant growth parameters and induced peroxidase activity in treated plantlets, suggesting a possible role in induced resistance. Our findings highlight the potential of strain XY006 as a biological agent for FWB, and further research is needed to enhance its efficacy and mode of action in planta.
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Affiliation(s)
- Xiaxia Wang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, China
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Zhenghua Du
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
- School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Chanxin Chen
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
- School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Shuang Guo
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
- College of Horticulture, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Qianzhuo Mao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Plant Virology, Ningbo University, Ningbo, China
| | - Wei Wu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Plant Virology, Ningbo University, Ningbo, China
| | - Ruimei Wu
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Wenbo Han
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Peifeng Xie
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yiping Zeng
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Wenna Shan
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Zonghua Wang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Universities Engineering Research Center of Marine Biology and Drugs, Fuzhou Institute of Oceanography, Minjiang University, Fuzhou, China
- *Correspondence: Zonghua Wang, ; Xiaomin Yu,
| | - Xiaomin Yu
- FAFU-UCR Joint Center for Horticultural Biology and Metabolomics, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou, China
- *Correspondence: Zonghua Wang, ; Xiaomin Yu,
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145
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Liu X, Hu YZ, Pan YR, Liu J, Jiang YB, Zhang YA, Zhang XJ. Comparative study on antibacterial characteristics of the multiple liver expressed antimicrobial peptides (LEAPs) in teleost fish. Front Immunol 2023; 14:1128138. [PMID: 36891317 PMCID: PMC9986249 DOI: 10.3389/fimmu.2023.1128138] [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: 12/20/2022] [Accepted: 02/02/2023] [Indexed: 02/22/2023] Open
Abstract
Antimicrobial peptides are important components of the host innate immune system, forming the first line of defense against infectious microorganisms. Among them, liver-expressed antimicrobial peptides (LEAPs) are a family of antimicrobial peptides that widely exist in vertebrates. LEAPs include two types, named LEAP-1 and LEAP-2, and many teleost fish have two or more LEAP-2s. In this study, LEAP-2C from rainbow trout and grass carp were discovered, both of which are composed of 3 exons and 2 introns. The antibacterial functions of the multiple LEAPs were systematically compared in rainbow trout and grass carp. The gene expression pattern revealed that rainbow trout and grass carp LEAP-1, LEAP-2A, LEAP-2B and/or LEAP-2C were differentially expressed in various tissues/organs, mainly in liver. After bacterial infection, the expression levels of LEAP-1, LEAP-2A, LEAP-2B and/or LEAP-2C in the liver and gut of rainbow trout and grass carp increased to varying degrees. Moreover, the antibacterial assay and bacterial membrane permeability assay showed that rainbow trout and grass carp LEAP-1, LEAP-2A, LEAP-2B and LEAP-2C all have antibacterial activities against a variety of Gram-positive and Gram-negative bacteria with varying levels through membrane rupture. Furthermore, cell transfection assay showed that only rainbow trout LEAP-1, but not LEAP-2, can lead to the internalization of ferroportin, the only iron exporter on cell surface, indicating that only LEAP-1 possess iron metabolism regulation activity in teleost fish. Taken together, this study systematically compared the antibacterial function of LEAPs in teleost fish and the results suggest that multiple LEAPs can enhance the immunity of teleost fish through different expression patterns and different antibacterial activities to various bacteria.
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Affiliation(s)
- Xun Liu
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, China
| | - Ya-Zhen Hu
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, China
| | - Yi-Ru Pan
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, China
| | - Jia Liu
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, China
| | - You-Bo Jiang
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, China
| | - Yong-An Zhang
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China
| | - Xu-Jie Zhang
- State Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, China
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146
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Aguilar S, Brunetti AE, Garay AV, Santos LC, Perez LO, Moreira D, Cancelarich NL, Barbosa EA, Basso NG, de Freitas SM, Faivovich J, Brand G, Cabrera GM, Leite JRSA, Marani MM. Structure and function of cationic hylin bioactive peptides from the tree frog Boana pulchella in interaction with lipid membranes. Peptides 2023; 159:170900. [PMID: 36336169 DOI: 10.1016/j.peptides.2022.170900] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 10/27/2022] [Accepted: 10/28/2022] [Indexed: 11/05/2022]
Abstract
Amphibians have a great diversity of bioactive peptides in their skin. The cDNA prepro-peptide sequencing allowed the identification of five novel mature peptides expressed in the skin of Boana pulchella, four with similar sequences to hylin peptides having a cationic amphipathic-helical structure. Whole mature peptides and some of their fragments were chemically-synthesized and tested against Gram-positive and Gram-negative bacterial strains. The mature peptide hylin-Pul3 was the most active, with a MIC= 14 µM against Staphylococcus aureus. Circular dichroism assays indicated that peptides are mostly unstructured in buffer solutions. Still, adding large unilamellar vesicles composed of dimyristoyl phosphatidylcholine and dimyristoylphosphatidylglycerol increased the α-helix content of novel hylins. These results demonstrate the strong influence of the environment on peptide conformation and highlight its significance while addressing the pharmacology of peptides and their biological function in frogs.
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Affiliation(s)
- Silvana Aguilar
- IPEEC-CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, U9120ACD Puerto Madryn, Argentina
| | - Andrés E Brunetti
- Laboratorio de Genética Evolutiva, Instituto de Biología Subtropical (CONICET-UNaM), Facultad de Ciencias Exactas Químicas y Naturales, Universidad Nacional de Misiones, N3300LQH Posadas, Argentina; Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Departamento de Ciências Biomoleculares, Universidade de São Paulo, 14040-903 Ribeirão Preto, Brazil
| | - Aisel Valle Garay
- Instituto de Ciências Biológicas, Departamento de Biologia Celular, Laboratório de Biofísica Molecular, Universidade de Brasília (UnB), Brasília, DF 70910-900, Brazil
| | - Liem Canet Santos
- Instituto de Ciências Biológicas, Departamento de Biologia Celular, Laboratório de Biofísica Molecular, Universidade de Brasília (UnB), Brasília, DF 70910-900, Brazil
| | - Luis O Perez
- IPCSH-CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, Puerto Madryn, Argentina
| | - Daniel Moreira
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília, 70910-900, Brazil
| | - Natalia L Cancelarich
- IPEEC-CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, U9120ACD Puerto Madryn, Argentina
| | - Eder Alves Barbosa
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília, 70910-900, Brazil
| | - Néstor G Basso
- IDEAus-CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, U9120ACD Puerto Madryn, Argentina
| | - Sonia Maria de Freitas
- Instituto de Ciências Biológicas, Departamento de Biologia Celular, Laboratório de Biofísica Molecular, Universidade de Brasília (UnB), Brasília, DF 70910-900, Brazil
| | - Julián Faivovich
- División Herpetología, Museo Argentino de Ciencias Naturales 'Bernardino Rivadavia' (CONICET), Buenos Aires, Argentina
| | - Guilherme Brand
- Laboratório de Síntese e Análise de Biomoléculas, LSAB, Instituto de Química, Universidade de Brasília (UnB), Brasília, DF 70910-900, Brazil
| | - Gabriela M Cabrera
- Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Universidad de Buenos Aires, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina
| | - José R S A Leite
- Núcleo de Pesquisa em Morfologia e Imunologia Aplicada, NuPMIA, Faculdade de Medicina, Universidade de Brasília, UnB, Brasília, 70910-900, Brazil; Laboratorio de Síntese e Análise de Biomolećulas, Instituto de Química, Universidade de Brasília, Brazil; Laboratorio de Espectrometria de Massa, EMBRAPA Recursos Genéticos e Biotecnología, Brasil, Instituto de Química, Universidade de Brasília, Brazil
| | - Mariela M Marani
- IPEEC-CONICET, Consejo Nacional de Investigaciones Científicas y Técnicas, U9120ACD Puerto Madryn, Argentina.
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147
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Lohan S, Konshina AG, Efremov RG, Maslennikov I, Parang K. Structure-Based Rational Design of Small α-Helical Peptides with Broad-Spectrum Activity against Multidrug-Resistant Pathogens. J Med Chem 2022; 66:855-874. [PMID: 36574364 PMCID: PMC9841524 DOI: 10.1021/acs.jmedchem.2c01708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A series of small (7-12 mer) amphipathic cationic peptides were designed and synthesized to create short helical peptides with broad-range bactericidal activity and selectivity toward the bacterial cells. The analysis identified a lead 12-mer peptide 8b with broad-spectrum activity against Gram-positive (MIC = 3.1-6.2 μg/mL) and Gram-negative (MIC = 6.2-12.5 μg/mL) bacteria and selectivity toward prokaryotic versus eukaryotic cells (HC50 = 280 μg/mL, >75% cell viability at 150 μg/mL). The rapid membranolytic action of 8b was demonstrated by a calcein dye leakage assay and confirmed using scanning electron microscopy. According to circular dichroism and NMR spectroscopy, the peptides have an irregular spatial structure in water. A lipid bilayer induced an amphipathic helix only in 12-mer peptides, including 8b. Molecular dynamics simulations provided detailed information about the interaction of 8b and its closest analogues with bacterial and mammalian membranes and revealed the roles of particular amino acids in the activity and selectivity of peptides.
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Affiliation(s)
- Sandeep Lohan
- Center
for Targeted Drug Delivery, Department of Biomedical and Pharmaceutical
Sciences, Chapman University School of Pharmacy, Harry and Diane Rinker Health Science
Campus, 94 01 Jeronimo Road, Irvine, California92618, United States,AJK
Biopharmaceutical, 5270
California Avenue, Irvine, California92617, United States
| | - Anastasia G. Konshina
- M.M.
Shemyakin & Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya Street, 16/10, Moscow117997, Russia
| | - Roman G. Efremov
- M.M.
Shemyakin & Yu.A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Miklukho-Maklaya Street, 16/10, Moscow117997, Russia,National
Research University Higher School of Economics, Myasnitskaya ul. 20, Moscow101000, Russia,Moscow Institute
of Physics and Technology (State University), Dolgoprudny, Moscow Oblast141701, Russia
| | - Innokentiy Maslennikov
- Structural
Biology Research Center, Department of Biomedical and Pharmaceutical
Sciences, Chapman University School of Pharmacy, Harry and Diane Rinker Health Science
Campus, 9401 Jeronimo Road, Irvine, California92618, United States,. Phone: +1-(714) 516-5448. Fax: +1-(714) 516-5481
| | - Keykavous Parang
- Center
for Targeted Drug Delivery, Department of Biomedical and Pharmaceutical
Sciences, Chapman University School of Pharmacy, Harry and Diane Rinker Health Science
Campus, 94 01 Jeronimo Road, Irvine, California92618, United States,. Phone: +1-(714) 516-5489. Fax: +1-(714) 516-5481
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148
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Chen YC, Qiu W, Zhang W, Zhang J, Chen R, Chen F, Wang KJ. A Novel Antimicrobial Peptide Sp-LECin with Broad-Spectrum Antimicrobial Activity and Anti- Pseudomonas aeruginosa Infection in Zebrafish. Int J Mol Sci 2022; 24:ijms24010267. [PMID: 36613722 PMCID: PMC9820466 DOI: 10.3390/ijms24010267] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/19/2022] [Accepted: 12/20/2022] [Indexed: 12/28/2022] Open
Abstract
New antimicrobial agents are urgently needed to address the increasing emergence and dissemination of multidrug-resistant bacteria. In the study, a chemically synthesized truncated peptide containing 22-amino acids derived from a C-type lectin homolog SpCTL6 of Scylla paramamosain was screened and found to exhibit broad-spectrum antimicrobial activity, indicating that it is an antimicrobial peptide (AMP), named Sp-LECin. Sp-LECin possessed the basic characteristics of most cationic AMPs, such as positive charge (+4) and a relatively high hydrophobicity (45%). After treatment with Sp-LECin, the disruption of microbial membrane integrity and even leakage of cellular contents was observed by scanning electron microscopy (SEM). In addition, Sp-LECin could bind lipopolysaccharide (LPS), increase the outer and inner membrane permeability and induce reactive oxygen species (ROS) production, ultimately leading to the death of Pseudomonas aeruginosa. Furthermore, Sp-LECin exhibited potent anti-biofilm activity against P. aeruginosa during both biofilm formation and maturation. Notably, Sp-LECin had no obvious cytotoxicity and could greatly improve the survival of P. aeruginosa-infected zebrafish, by approximately 40% over the control group after 72 h of treatment. This study indicated that Sp-LECin is a promising antibacterial agent with the potential to be used against devastating global pathogen infections such as P. aeruginosa.
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Affiliation(s)
- Yan-Chao Chen
- State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Wanlei Qiu
- State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Weibin Zhang
- State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Jingrong Zhang
- State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Roushi Chen
- State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China
| | - Fangyi Chen
- State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China
- State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China
- Fujian Innovation Research Institute for Marine Biological Antimicrobial Peptide Industrial Technology, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China
- Correspondence: (F.C.); (K.-J.W.)
| | - Ke-Jian Wang
- State Key Laboratory of Marine Environmental Science, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China
- State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China
- Fujian Innovation Research Institute for Marine Biological Antimicrobial Peptide Industrial Technology, College of Ocean & Earth Sciences, Xiamen University, Xiamen 361102, China
- Correspondence: (F.C.); (K.-J.W.)
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149
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Deciphering Structure-Function Relationship Unveils Salt-Resistant Mode of Action of a Potent MRSA-Inhibiting Antimicrobial Peptide, RR14. J Bacteriol 2022; 204:e0031222. [PMID: 36377870 PMCID: PMC9765028 DOI: 10.1128/jb.00312-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Multidrug-resistant (MDR) bacteria lead to considerable morbidity and mortality, threatening public health worldwide. In particular, infections of methicillin-resistant Staphylococcus aureus (MRSA) in hospital and community settings are becoming a serious health problem. Antimicrobial peptides (AMPs) are considered novel therapeutic targets against MDR bacteria. However, salt sensitivity reduces the bactericidal potency of AMPs, posing a major obstacle for their development as antibiotics. Thus, the design and development of salt-insensitive peptides with potent antibacterial activity is imperative. Here, we employed biochemical and biophysical examinations coupled with molecular modeling to systematically investigate the structure-function relationship of a novel salt-insensitive AMP, RR14. The secondary structure of RR14 was characterized as an apparent α-helix, a structure that confers strong membrane-permeabilizing ability targeting bacterial-mimetic membranes. Additionally, the bioactive structure of RR14 was determined in complex with dodecylphosphocholine (DPC) micelles, where it possesses a central α-helical segment comprising residues R4 to K13 (R4-K13). RR14 was observed to orient itself into the DPC micelle with its N terminus and the α-helical segment (I5-R10) buried inside the micelles, which is essential for membrane permeabilization and bactericidal activity. Moreover, the specific and featured arrangement of positively charged residues of RR14 on its amphipathic helical conformation has great potential to render its strong salt resistance ability. Our study explored the structure-function relationship of RR14, explaining its possible mode of action against MRSA and other microbes. The insights obtained are of great applicability for the development of new antibacterial agents. IMPORTANCE Many antimicrobial peptides have been observed to become inactive in the presence of high salt concentrations. To further develop new and novel AMPs with potent bactericidal activity and salt insensitivity, understanding the structural basis for salt resistance is important. Here, we employed biochemical and biophysical examinations to systematically investigate the structure-function relationship of a novel salt-insensitive AMP, RR14. RR14 was observed to orient itself into DPC micelles with the N terminus and the α-helical segment (I5-R10) buried inside the micelles, which is essential for membrane permeabilization and bactericidal activity. Moreover, the specific and featured arrangement of cationic residues of RR14 on its amphipathic helical conformation renders its strong salt resistance ability. The insights obtained are of great applicability for developing new antibacterial agents.
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150
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Bak IG, Chae CG, Choi J, Song WY, Seo J, Lee E, Lee JS. Synthesis of Alternating Polyisocyanate Copolymers by Anionic Polymerization for Mimicking Amphiphilic Helical Peptides. Angew Chem Int Ed Engl 2022; 61:e202212398. [PMID: 36268639 DOI: 10.1002/anie.202212398] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Indexed: 11/18/2022]
Abstract
The amphiphilic conformation of α-helical peptides has important biological functions, such as ion transport, antifreeze, and innate immunity, which can be mimicked by alternating polyisocyanate copolymers. We synthesized poly(allyl isocyanate-alt-(S)-(-)-α-methylbenzyl isocyanate (P(AIC-alt-SMBIC)) and ammonium-containing P(AIC-alt-SMBIC) (N-P(AIC-alt-SMBIC)), ensuring the amphiphilic helical conformation. The benzyl group of SMBIC plays an important role in alternating copolymerization with its steric and electron-withdrawing effects, while AIC provides an alkene group capable of introducing a customized functional group. The P(AIC-alt-SMBIC) with predominantly alternating sequence was acquired at fSMBIC /fAIC =8 with a controlled molecular weight and narrow dispersity. N-P(AIC-alt-SMBIC)s were synthesized from thiol-ene radical addition with P(AIC-alt-SMBIC).
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Affiliation(s)
- In Gyu Bak
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea
| | - Chang-Guen Chae
- Advanced Materials Division, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon, 34114, Republic of Korea
| | - Jieun Choi
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea
| | - Woo-Young Song
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea
| | - Jiwon Seo
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea
| | - Eunji Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea
| | - Jae-Suk Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea
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