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Dai J, Ashrafizadeh M, Aref AR, Sethi G, Ertas YN. Peptide-functionalized, -assembled and -loaded nanoparticles in cancer therapy. Drug Discov Today 2024; 29:103981. [PMID: 38614161 DOI: 10.1016/j.drudis.2024.103981] [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: 09/17/2023] [Revised: 03/20/2024] [Accepted: 04/07/2024] [Indexed: 04/15/2024]
Abstract
The combination of peptides and nanoparticles in cancer therapy has shown synergistic results. Nanoparticle functionalization with peptides can increase their targeting ability towards tumor cells. In some cases, the peptides can develop self-assembled nanoparticles, in combination with drugs, for targeted cancer therapy. The peptides can be loaded into nanoparticles and can be delivered by other drugs for synergistic cancer removal. Multifunctional types of peptide-based nanoparticles, including pH- and redox-sensitive classes, have been introduced in cancer therapy. The tumor microenvironment remolds, and the acceleration of immunotherapy and vaccines can be provided by peptide nanoparticles. Moreover, the bioimaging and labeling of cancers can be mediated by peptide nanoparticles. Therefore, peptides can functionalize nanoparticles in targeted cancer therapy.
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Affiliation(s)
- Jingyuan Dai
- School of Computer Science and Information Systems, Northwest Missouri State University, Maryville, MO, USA
| | - Milad Ashrafizadeh
- Department of General Surgery, Institute of Precision Diagnosis and Treatment of Digestive System Tumors, Carson International Cancer Center, Shenzhen University General Hospital, Shenzhen University, Shenzhen, Guangdong 518055, China; International Association for Diagnosis and Treatment of Cancer, Shenzhen, Guangdong 518055, China; Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai 200032, China.
| | - Amir Reza Aref
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Gautam Sethi
- Department of Pharmacology and NUS Centre for Cancer Research (N2CR), Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.
| | - Yavuz Nuri Ertas
- ERNAM-Nanotechnology Research and Application Center, Erciyes University, Kayseri 38039, Turkey; Department of Biomedical Engineering, Erciyes University, Kayseri, Turkey.
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2
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Yang L, Gao Y, Zhang J, Tian C, Lin F, Song D, Zhou L, Peng J, Guo G. Antimicrobial peptide DvAMP combats carbapenem-resistant Acinetobacter baumannii infection. Int J Antimicrob Agents 2024; 63:107106. [PMID: 38325724 DOI: 10.1016/j.ijantimicag.2024.107106] [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: 08/16/2023] [Revised: 12/26/2023] [Accepted: 01/29/2024] [Indexed: 02/09/2024]
Abstract
Carbapenem-resistant Acinetobacter baumannii (CRAB), an important opportunistic pathogen, is a major cause of healthcare-associated infections. The polymyxins (colistin and polymyxin B) are the last line of defense in the treatment of CRAB infections, and there is an urgent need to develop novel alternative therapeutic strategies. In this study, we found that the antimicrobial peptide DvAMP exhibited satisfactory antibacterial and antibiofilm activity against CRAB. In addition, DvAMP showed tolerable stability in salt ions and serum and exhibited low toxicity in vivo. Investigation of the underlying mechanism demonstrated that DvAMP disrupts cell membrane structural integrity and specifically binds to exogenous lipopolysaccharides (LPS) and phospholipids (PG/CL), resulting in increased membrane permeability and dissipating proton motive force (PMF), further reducing intracellular ATP levels and inducing ROS accumulation, leading to bacterial death. Furthermore, DvAMP therapy efficiently improved survival rates and decreased the bacterial load in the lungs of mice in a mouse pneumonia model, showing that DvAMP administration reduced CRAB susceptibility to lung infection. These results indicate that the peptide DvAMP is a promising alternative therapeutic agent to combat CRAB infection.
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Affiliation(s)
- Longbing Yang
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China; Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, China; Translational Medicine Research Center, Guizhou Medical University, Guiyang, China
| | - Yongfei Gao
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
| | - Jin Zhang
- Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, China; School of Public Health, Guizhou Medical University, Guiyang, China
| | - Chunren Tian
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
| | - Fei Lin
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China
| | - Dongxu Song
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China; Translational Medicine Research Center, Guizhou Medical University, Guiyang, China
| | - Luoxiong Zhou
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China; School of Public Health, Guizhou Medical University, Guiyang, China
| | - Jian Peng
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China; Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, China.
| | - Guo Guo
- The Key and Characteristic Laboratory of Modern Pathogen Biology, School of Basic Medical Sciences, Guizhou Medical University, Guiyang, China; Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, Guizhou Medical University, Guiyang, China; Translational Medicine Research Center, Guizhou Medical University, Guiyang, China.
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3
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Das P, N M, Singh N, Datta P. Supramolecular Nanostructures for the Delivery of Peptides in Cancer Therapy. J Pharmacol Exp Ther 2024; 388:67-80. [PMID: 37827700 DOI: 10.1124/jpet.123.001698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 08/31/2023] [Accepted: 09/18/2023] [Indexed: 10/14/2023] Open
Abstract
Supramolecular nanostructured based delivery systems are emerging as a meaningful approach in the treatment of cancer, offering controlled drug release and improved therapeutic efficacy. The self-assembled structures can be small molecules, polymers, peptides, or proteins, which can be used and functionalized to achieve tailored release and target specific cells, tissues, or organs. These structures can improve the solubility and stability of drugs having low aqueous solubility by encapsulating and protecting them from degradation. Alongside, peptides as natural biomolecules have gained increasing attention as potential candidates in cancer treatment because of their biocompatibility, low cytotoxicity, and high specificity toward tumor cells. The amino acid sequences in peptide molecules are tunable, efficiently controlling the morphology of peptide-based self-assembled nanosystems and offering flexibility to form supramolecular nanostructures (SNs). It is evident from the current literature that the supramolecular nanostructures based delivery of peptide for cancer treatment hold great promise for future cancer therapy, offering potential strategies for personalized medicine with improved patient outcomes. SIGNIFICANCE STATEMENT: This review focuses on fundamentals and various drug delivery mechanisms based on SNs. Different SN approaches and recent literature reviews on peptide delivery are also presented to the readers.
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Affiliation(s)
- Priyanka Das
- Polymer-Based Medical Devices and Complex Drug Delivery Systems Laboratory, Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, India
| | - Manasa N
- Polymer-Based Medical Devices and Complex Drug Delivery Systems Laboratory, Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, India
| | - Nidhi Singh
- Polymer-Based Medical Devices and Complex Drug Delivery Systems Laboratory, Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, India
| | - Pallab Datta
- Polymer-Based Medical Devices and Complex Drug Delivery Systems Laboratory, Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Kolkata, India
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4
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Li C, Jin K. Chemical Strategies towards the Development of Effective Anticancer Peptides. Curr Med Chem 2024; 31:1839-1873. [PMID: 37170992 DOI: 10.2174/0929867330666230426111157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 01/28/2023] [Accepted: 02/24/2023] [Indexed: 05/13/2023]
Abstract
Cancer is increasingly recognized as one of the primary causes of death and has become a multifaceted global health issue. Modern medical science has made significant advancements in the diagnosis and therapy of cancer over the past decade. The detrimental side effects, lack of efficacy, and multidrug resistance of conventional cancer therapies have created an urgent need for novel anticancer therapeutics or treatments with low cytotoxicity and drug resistance. The pharmaceutical groups have recognized the crucial role that peptide therapeutic agents can play in addressing unsatisfied healthcare demands and how these become great supplements or even preferable alternatives to biological therapies and small molecules. Anticancer peptides, as a vibrant therapeutic strategy against various cancer cells, have demonstrated incredible anticancer potential due to high specificity and selectivity, low toxicity, and the ability to target the surface of traditional "undruggable" proteins. This review will provide the research progression of anticancer peptides, mainly focusing on the discovery and modifications along with the optimization and application of these peptides in clinical practice.
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Affiliation(s)
- Cuicui Li
- Key Laboratory of Chemical Biology (Ministry of Education), Department of Medicinal Chemistry, School of Pharmacy, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Kang Jin
- Key Laboratory of Chemical Biology (Ministry of Education), Department of Medicinal Chemistry, School of Pharmacy, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
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5
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Anurag Anand A, Amod A, Anwar S, Sahoo AK, Sethi G, Samanta SK. A comprehensive guide on screening and selection of a suitable AMP against biofilm-forming bacteria. Crit Rev Microbiol 2023:1-20. [PMID: 38102871 DOI: 10.1080/1040841x.2023.2293019] [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: 10/04/2023] [Accepted: 11/30/2023] [Indexed: 12/17/2023]
Abstract
Lately, antimicrobial resistance (AMR) is increasing at an exponential rate making it important to search alternatives to antibiotics in order to combat multi-drug resistant (MDR) bacterial infections. Out of the several antibacterial and antibiofilm strategies being tested, antimicrobial peptides (AMPs) have shown to give better hopes in terms of a long-lasting solution to the problem. To select a desired AMP, it is important to make right use of available tools and databases that aid in identification, classification, and analysis of the physiochemical properties of AMPs. To identify the targets of these AMPs, it becomes crucial to understand their mode-of-action. AMPs can also be used in combination with other antibacterial and antibiofilm agents so as to achieve enhanced efficacy against bacteria and their biofilms. Due to concerns regarding toxicity, stability, and bioavailability, strategizing drug formulation at an early-stage becomes crucial. Although there are few concerns regarding development of bacterial resistance to AMPs, the evolution of resistance to AMPs occurs extremely slowly. This comprehensive review gives a deep insight into the selection of the right AMP, deciding the right target and combination strategy along with the type of formulation needed, and the possible resistance that bacteria can develop to these AMPs.
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Affiliation(s)
- Ananya Anurag Anand
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, India
| | - Ayush Amod
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, India
| | - Sarfraz Anwar
- Department of Bioinformatics, University of Allahabad, Prayagraj, India
| | - Amaresh Kumar Sahoo
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, India
| | - Gautam Sethi
- Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Sintu Kumar Samanta
- Department of Applied Sciences, Indian Institute of Information Technology Allahabad, Prayagraj, India
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6
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Gerstmans H, Duyvejonck L, Vázquez R, Staes I, Borloo J, Abdelkader K, Leroy J, Cremelie E, Gutiérrez D, Tamés-Caunedo H, Ruas-Madiedo P, Rodríguez A, Aertsen A, Lammertyn J, Lavigne R, Briers Y. Distinct mode of action of a highly stable, engineered phage lysin killing Gram-negative bacteria. Microbiol Spectr 2023; 11:e0181323. [PMID: 37971248 PMCID: PMC10714810 DOI: 10.1128/spectrum.01813-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 10/12/2023] [Indexed: 11/19/2023] Open
Abstract
IMPORTANCE Engineered lysins are considered as highly promising alternatives for antibiotics. Our previous screening study using VersaTile technology identified 1D10 as a possible lead compound with activity against Acinetobacter baumannii strains under elevated human serum concentrations. In this manuscript, we reveal an unexpected mode of action and exceptional thermoresistance for lysin 1D10. Our findings shed new light on the development of engineered lysins, providing valuable insights for future research in this field.
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Affiliation(s)
- Hans Gerstmans
- Department of Biotechnology, Ghent University, Ghent, Belgium
- Department of Biosystems, KU Leuven, Leuven, Belgium
| | - Lisa Duyvejonck
- Department of Biotechnology, Ghent University, Ghent, Belgium
| | - Roberto Vázquez
- Department of Biotechnology, Ghent University, Ghent, Belgium
| | - Ines Staes
- Department of Microbial and Molecular Systems, Leuven, Belgium
| | | | - Karim Abdelkader
- Department of Biotechnology, Ghent University, Ghent, Belgium
- Department of Microbiology and Immunology, Beni-Suef University, Beni-Suef, Egypt
| | - Jeroen Leroy
- Department of Biotechnology, Ghent University, Ghent, Belgium
| | - Emma Cremelie
- Department of Biotechnology, Ghent University, Ghent, Belgium
| | - Diana Gutiérrez
- Department of Biotechnology, Ghent University, Ghent, Belgium
| | - Héctor Tamés-Caunedo
- Dairy Research Institute of Asturias, Spanish National Research Council (IPLA-CSIC), Villaviciosa, Asturias, Spain
| | - Patricia Ruas-Madiedo
- Dairy Research Institute of Asturias, Spanish National Research Council (IPLA-CSIC), Villaviciosa, Asturias, Spain
| | - Ana Rodríguez
- Dairy Research Institute of Asturias, Spanish National Research Council (IPLA-CSIC), Villaviciosa, Asturias, Spain
| | - Abram Aertsen
- Department of Microbial and Molecular Systems, Leuven, Belgium
| | | | - Rob Lavigne
- Department of Biosystems, KU Leuven, Leuven, Belgium
| | - Yves Briers
- Department of Biotechnology, Ghent University, Ghent, Belgium
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7
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Mendes SG, Combo SI, Allain T, Domingues S, Buret AG, Da Silva GJ. Co-regulation of biofilm formation and antimicrobial resistance in Acinetobacter baumannii: from mechanisms to therapeutic strategies. Eur J Clin Microbiol Infect Dis 2023; 42:1405-1423. [PMID: 37897520 PMCID: PMC10651561 DOI: 10.1007/s10096-023-04677-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 10/02/2023] [Indexed: 10/30/2023]
Abstract
In recent years, multidrug-resistant Acinetobacter baumannii has emerged globally as a major threat to the healthcare system. It is now listed by the World Health Organization as a priority one for the need of new therapeutic agents. A. baumannii has the capacity to develop robust biofilms on biotic and abiotic surfaces. Biofilm development allows these bacteria to resist various environmental stressors, including antibiotics and lack of nutrients or water, which in turn allows the persistence of A. baumannii in the hospital environment and further outbreaks. Investigation into therapeutic alternatives that will act on both biofilm formation and antimicrobial resistance (AMR) is sorely needed. The aim of the present review is to critically discuss the various mechanisms by which AMR and biofilm formation may be co-regulated in A. baumannii in an attempt to shed light on paths towards novel therapeutic opportunities. After discussing the clinical importance of A. baumannii, this critical review highlights biofilm-formation genes that may be associated with the co-regulation of AMR. Particularly worthy of consideration are genes regulating the quorum sensing system AbaI/AbaR, AbOmpA (OmpA protein), Bap (biofilm-associated protein), the two-component regulatory system BfmRS, the PER-1 β-lactamase, EpsA, and PTK. Finally, this review discusses ongoing experimental therapeutic strategies to fight A. baumannii infections, namely vaccine development, quorum sensing interference, nanoparticles, metal ions, natural products, antimicrobial peptides, and phage therapy. A better understanding of the mechanisms that co-regulate biofilm formation and AMR will help identify new therapeutic targets, as combined approaches may confer synergistic benefits for effective and safer treatments.
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Affiliation(s)
- Sérgio G Mendes
- Departments of Biological Sciences, Inflammation Research Network, University of Calgary, 2500 University Dr. N.W, Calgary, T2N 1N4, Canada
- Faculty of Pharmacy, University of Coimbra, 3000-548, Coimbra, Portugal
- Centre for Neuroscience and Cell Biology, University of Coimbra, 3000-548, Coimbra, Portugal
| | - Sofia I Combo
- Departments of Biological Sciences, Inflammation Research Network, University of Calgary, 2500 University Dr. N.W, Calgary, T2N 1N4, Canada
- Faculty of Pharmacy, University of Coimbra, 3000-548, Coimbra, Portugal
- Centre for Neuroscience and Cell Biology, University of Coimbra, 3000-548, Coimbra, Portugal
| | - Thibault Allain
- Departments of Biological Sciences, Inflammation Research Network, University of Calgary, 2500 University Dr. N.W, Calgary, T2N 1N4, Canada
| | - Sara Domingues
- Faculty of Pharmacy, University of Coimbra, 3000-548, Coimbra, Portugal
- Centre for Neuroscience and Cell Biology, University of Coimbra, 3000-548, Coimbra, Portugal
| | - Andre G Buret
- Departments of Biological Sciences, Inflammation Research Network, University of Calgary, 2500 University Dr. N.W, Calgary, T2N 1N4, Canada
| | - Gabriela J Da Silva
- Departments of Biological Sciences, Inflammation Research Network, University of Calgary, 2500 University Dr. N.W, Calgary, T2N 1N4, Canada.
- Faculty of Pharmacy, University of Coimbra, 3000-548, Coimbra, Portugal.
- Centre for Neuroscience and Cell Biology, University of Coimbra, 3000-548, Coimbra, Portugal.
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8
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Rangel K, Lechuga GC, Provance DW, Morel CM, De Simone SG. An Update on the Therapeutic Potential of Antimicrobial Peptides against Acinetobacter baumannii Infections. Pharmaceuticals (Basel) 2023; 16:1281. [PMID: 37765087 PMCID: PMC10537560 DOI: 10.3390/ph16091281] [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: 07/08/2023] [Revised: 08/09/2023] [Accepted: 09/06/2023] [Indexed: 09/29/2023] Open
Abstract
The rise in antibiotic-resistant strains of clinically important pathogens is a major threat to global health. The World Health Organization (WHO) has recognized the urgent need to develop alternative treatments to address the growing list of priority pathogens. Antimicrobial peptides (AMPs) rank among the suggested options with proven activity and high potential to be developed into effective drugs. Many AMPs are naturally produced by living organisms protecting the host against pathogens as a part of their innate immunity. Mechanisms associated with AMP actions include cell membrane disruption, cell wall weakening, protein synthesis inhibition, and interference in nucleic acid dynamics, inducing apoptosis and necrosis. Acinetobacter baumannii is a critical pathogen, as severe clinical implications have developed from isolates resistant to current antibiotic treatments and conventional control procedures, such as UV light, disinfectants, and drying. Here, we review the natural AMPs representing primary candidates for new anti-A. baumannii drugs in post-antibiotic-era and present computational tools to develop the next generation of AMPs with greater microbicidal activity and reduced toxicity.
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Affiliation(s)
- Karyne Rangel
- Center for Technological Development in Health (CDTS), National Institute of Science and Technology for Innovation in Neglected Population Diseases (INCT-IDPN), Oswaldo Cruz Institut, Oswaldo Cruz Foundation, Rio de Janeiro 21040-900, RJ, Brazil; (K.R.); (G.C.L.); (D.W.P.J.); (C.M.M.)
- Epidemiology and Molecular Systematics Laboratory (LEMS), Oswaldo Cruz Institut, Oswaldo Cruz Foundation, Rio de Janeiro 21040-900, RJ, Brazil
| | - Guilherme Curty Lechuga
- Center for Technological Development in Health (CDTS), National Institute of Science and Technology for Innovation in Neglected Population Diseases (INCT-IDPN), Oswaldo Cruz Institut, Oswaldo Cruz Foundation, Rio de Janeiro 21040-900, RJ, Brazil; (K.R.); (G.C.L.); (D.W.P.J.); (C.M.M.)
- Epidemiology and Molecular Systematics Laboratory (LEMS), Oswaldo Cruz Institut, Oswaldo Cruz Foundation, Rio de Janeiro 21040-900, RJ, Brazil
| | - David W. Provance
- Center for Technological Development in Health (CDTS), National Institute of Science and Technology for Innovation in Neglected Population Diseases (INCT-IDPN), Oswaldo Cruz Institut, Oswaldo Cruz Foundation, Rio de Janeiro 21040-900, RJ, Brazil; (K.R.); (G.C.L.); (D.W.P.J.); (C.M.M.)
- Epidemiology and Molecular Systematics Laboratory (LEMS), Oswaldo Cruz Institut, Oswaldo Cruz Foundation, Rio de Janeiro 21040-900, RJ, Brazil
| | - Carlos M. Morel
- Center for Technological Development in Health (CDTS), National Institute of Science and Technology for Innovation in Neglected Population Diseases (INCT-IDPN), Oswaldo Cruz Institut, Oswaldo Cruz Foundation, Rio de Janeiro 21040-900, RJ, Brazil; (K.R.); (G.C.L.); (D.W.P.J.); (C.M.M.)
| | - Salvatore G. De Simone
- Center for Technological Development in Health (CDTS), National Institute of Science and Technology for Innovation in Neglected Population Diseases (INCT-IDPN), Oswaldo Cruz Institut, Oswaldo Cruz Foundation, Rio de Janeiro 21040-900, RJ, Brazil; (K.R.); (G.C.L.); (D.W.P.J.); (C.M.M.)
- Epidemiology and Molecular Systematics Laboratory (LEMS), Oswaldo Cruz Institut, Oswaldo Cruz Foundation, Rio de Janeiro 21040-900, RJ, Brazil
- Program of Post-Graduation on Science and Biotechnology, Department of Molecular and Cellular Biology, Biology Institute, Federal Fluminense University, Niterói 22040-036, RJ, Brazil
- Program of Post-Graduation on Parasitic Biology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro 21040-900, RJ, Brazil
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9
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Smola-Dmochowska A, Lewicka K, Macyk A, Rychter P, Pamuła E, Dobrzyński P. Biodegradable Polymers and Polymer Composites with Antibacterial Properties. Int J Mol Sci 2023; 24:ijms24087473. [PMID: 37108637 PMCID: PMC10138923 DOI: 10.3390/ijms24087473] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/05/2023] [Accepted: 04/07/2023] [Indexed: 04/29/2023] Open
Abstract
Antibiotic resistance is one of the greatest threats to global health and food security today. It becomes increasingly difficult to treat infectious disorders because antibiotics, even the newest ones, are becoming less and less effective. One of the ways taken in the Global Plan of Action announced at the World Health Assembly in May 2015 is to ensure the prevention and treatment of infectious diseases. In order to do so, attempts are made to develop new antimicrobial therapeutics, including biomaterials with antibacterial activity, such as polycationic polymers, polypeptides, and polymeric systems, to provide non-antibiotic therapeutic agents, such as selected biologically active nanoparticles and chemical compounds. Another key issue is preventing food from contamination by developing antibacterial packaging materials, particularly based on degradable polymers and biocomposites. This review, in a cross-sectional way, describes the most significant research activities conducted in recent years in the field of the development of polymeric materials and polymer composites with antibacterial properties. We particularly focus on natural polymers, i.e., polysaccharides and polypeptides, which present a mechanism for combating many highly pathogenic microorganisms. We also attempt to use this knowledge to obtain synthetic polymers with similar antibacterial activity.
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Affiliation(s)
- Anna Smola-Dmochowska
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34 Marii Curie-Skłodowskiej Str., 41-819 Zabrze, Poland
| | - Kamila Lewicka
- Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, 13/15 Armii Krajowej Av., 42-200 Czestochowa, Poland
| | - Alicja Macyk
- Department of Biomaterials and Composites, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30 Mickiewicza Av., 30-059 Kraków, Poland
| | - Piotr Rychter
- Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, 13/15 Armii Krajowej Av., 42-200 Czestochowa, Poland
| | - Elżbieta Pamuła
- Department of Biomaterials and Composites, Faculty of Materials Science and Ceramics, AGH University of Science and Technology, 30 Mickiewicza Av., 30-059 Kraków, Poland
| | - Piotr Dobrzyński
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34 Marii Curie-Skłodowskiej Str., 41-819 Zabrze, Poland
- Faculty of Science and Technology, Jan Dlugosz University in Czestochowa, 13/15 Armii Krajowej Av., 42-200 Czestochowa, Poland
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10
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Espeche JC, Varas R, Maturana P, Cutro AC, Maffía PC, Hollmann A. Membrane permeability and antimicrobial peptides: Much more than just making a hole. Pept Sci (Hoboken) 2023. [DOI: 10.1002/pep2.24305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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11
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Suchi SA, Nam KB, Kim YK, Tarek H, Yoo JC. A novel antimicrobial peptide YS12 isolated from Bacillus velezensis CBSYS12 exerts anti-biofilm properties against drug-resistant bacteria. Bioprocess Biosyst Eng 2023; 46:813-828. [PMID: 36997801 DOI: 10.1007/s00449-023-02864-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 03/09/2023] [Indexed: 04/01/2023]
Abstract
Nowadays, the abuse of antibiotics has led to the rise of multi-drug-resistant bacteria. Antimicrobial peptides (AMPs), with broad-spectrum antimicrobial activity have attracted considerable attention as possible alternatives to traditional antibiotics. In this work, we aimed to evaluate the antimicrobial and anti-biofilm activity of an antimicrobial peptide designed as YS12 derived from Bacillus velezensis CBSYS12. The strain CBSYS12 was isolated from Korean food kimchi and purified followed by ultrafiltration and sequential chromatographic methodology. Hereafter, Tricine SDS-PAGE revealed a single protein band of around 3.3 kDa that was further confirmed in situ inhibitory activity of the gel. A similar molecular weight (~ 3348.4 Da) protein also appeared in MALDI-TOF confirming the purity and homogeneity of peptide YS12. Intriguingly, YS12 revealed a strong antimicrobial activity with a minimum inhibitory concentration (MIC) value ranging from 6 to 12 μg/ml for both Gram-positive and Gram-negative bacteria, such as E. coli, P. aeruginosa, MRSA 4-5, VRE 82, and M. smegmatis. We also determined the mode of action of the peptide against pathogenic microorganisms using different fluorescent dyes. In addition, the anti-biofilm assay demonstrated that peptide YS12 was able to inhibit biofilm formation around 80% for both bacterial strains E. coli and P. aeruginosa at 80 µg/ml. Notably, YS12 exhibited a greater biofilm eradication activity than commercial antibiotics. In summary, our study proposed that peptide YS12 may be used as a promising therapeutic agent to overcome drug and biofilm-related infections.
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Affiliation(s)
- Suzia Aktar Suchi
- Department of Pharmacy, College of Pharmacy, Chosun University, Gwangju, 61452, Republic of Korea
| | - Kyung Bin Nam
- Department of Pharmacy, College of Pharmacy, Chosun University, Gwangju, 61452, Republic of Korea
| | - Young Kyun Kim
- Department of Pharmacy, College of Pharmacy, Chosun University, Gwangju, 61452, Republic of Korea
| | - Hasan Tarek
- Department of Pharmacy, College of Pharmacy, Chosun University, Gwangju, 61452, Republic of Korea
| | - Jin Cheol Yoo
- Department of Pharmacy, College of Pharmacy, Chosun University, Gwangju, 61452, Republic of Korea.
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12
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MacDermott-Opeskin HI, Wilson KA, O'Mara ML. The Impact of Antimicrobial Peptides on the Acinetobacter baumannii Inner Membrane Is Modulated by Lipid Polyunsaturation. ACS Infect Dis 2023; 9:815-826. [PMID: 36920795 DOI: 10.1021/acsinfecdis.2c00530] [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: 03/16/2023]
Abstract
The Gram-negative pathogen Acinetobacter baumannii is a primary contributor to nosocomial multi-drug-resistant (MDR) infections. To combat the rise of MDR infections, novel features of A. baumannii need to be considered for the development of new treatment options. One such feature is the preferential scavenging of exogenous lipids, including host-derived polyunsaturated fatty acids (PUFAs), for membrane phospholipid synthesis. These alterations in membrane composition impact both the lipid chemistry and the membrane biophysical properties. In this work we examine how antimicrobial peptides (AMPs) interact with the inner membranes of A. baumannii in the presence and absence of polyunsaturated phospholipids. Using coarse-grained molecular dynamics simulations of complex A. baumannii inner membrane models derived from lipidomes of bacteria grown in the presence and absence of PUFAs, we examine the impact of the adsorption of four prototypical AMPs (CAMEL, LL-37, pexiganan, and magainin-2) on the membrane biophysical properties. Our simulations reveal that the impact of AMP adsorption on the membrane biophysical properties was dependent on both the membrane composition and the specific AMP involved. Both lipid headgroup charge and tail unsaturation played important roles in driving the interactions that occurred both within the membrane and between the membrane and AMPs. The changes to the membrane biophysical properties also showed a complex relationship with the AMP's physical properties, such as AMP charge, chain length, and charge-to-mass ratio. Cumulatively, this work highlights the importance of studying AMPs using a complex membrane environment and provides insights into the mechanistic action of AMPs in polyunsaturated lipid-rich bacterial membranes.
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Affiliation(s)
- Hugo I MacDermott-Opeskin
- Research School of Chemistry, College of Science, The Australian National University, Canberra, ACT 2601, Australia
| | - Katie A Wilson
- Research School of Chemistry, College of Science, The Australian National University, Canberra, ACT 2601, Australia.,Department of Biochemistry, Memorial University of Newfoundland, St. John's, NL A1C 5S7 Canada
| | - Megan L O'Mara
- Research School of Chemistry, College of Science, The Australian National University, Canberra, ACT 2601, Australia.,Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
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13
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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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14
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Zhang Y, Wang C, Zhang W, Li X. Bioactive peptides for anticancer therapies. BIOMATERIALS TRANSLATIONAL 2023; 4:5-17. [PMID: 37206303 PMCID: PMC10189813 DOI: 10.12336/biomatertransl.2023.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 02/02/2023] [Accepted: 03/10/2023] [Indexed: 05/21/2023]
Abstract
Cancer is a serious concern in public health worldwide. Numerous modalities including surgery, radiotherapy, and chemotherapy, have been used for cancer therapies in clinic. Despite progress in anticancer therapies, the usage of these methods for cancer treatment is often related to deleterious side effects and multidrug resistance of conventional anticancer drugs, which have prompted the development of novel therapeutic methods. Anticancer peptides (ACPs), derived from naturally occurring and modified peptides, have received great attention in these years and emerge as novel therapeutic and diagnostic candidates for cancer therapies, because of several advantages over the current treatment modalities. In this review, the classification and properties of ACPs, the mode of action and mechanism of membrane disruption, as well as the natural sources of bioactive peptides with anticancer activities were summarised. Because of their high efficacy for inducing cancer cell death, certain ACPs have been developed to work as drugs and vaccines, evaluated in varied phases of clinical trials. We expect that this summary could facilitate the understanding and design of ACPs with increased specificity and toxicity towards malignant cells and with reduced side effects to normal cells.
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15
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Kang DD, Park J, Park Y. Therapeutic Potential of Antimicrobial Peptide PN5 against Multidrug-Resistant E. coli and Anti-Inflammatory Activity in a Septic Mouse Model. Microbiol Spectr 2022; 10:e0149422. [PMID: 36129300 PMCID: PMC9603901 DOI: 10.1128/spectrum.01494-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 09/01/2022] [Indexed: 12/31/2022] Open
Abstract
Antibiotic-resistant bacteria have become a public health problem. Thus, antimicrobial peptides (AMPs) have been evaluated as substitutes for antibiotics. Herein, we investigated PN5 derived from Pinus densiflora (pine needle). PN5 exhibited antimicrobial activity without causing cytotoxic effects. Based on these results, we examined the mode of action of PN5 against Gram-negative and -positive bacteria. PN5 exhibited membrane permeabilization ability, had antimicrobial stability in the presence of elastase, a proteolytic enzyme, and did not induce resistance in bacteria. Bacterial lipopolysaccharide (LPS) induces an inflammatory response in RAW 264.7 macrophages. PN5 suppressed proinflammatory cytokines mediated by NF-κB and mitogen-activated protein kinase signaling. In C57BL/6J mice treated with LPS and d-galactosamine, PN5 exhibited anti-inflammatory activity in inflamed mouse livers. Our results indicate that PN5 has antimicrobial and anti-inflammatory activities and thus may be useful as an antimicrobial agent to treat septic shock caused by multidrug-resistant (MDR) Escherichia coli without causing further resistance. IMPORTANCE Antibiotic-resistant bacteria are a global health concern. There is no effective treatment for antibiotic-resistant bacteria, and new alternatives are being suggested. The present study found antibacterial and anti-inflammatory activities of PN5 derived from Pinus densiflora (pine needle), and further investigated the therapeutic effect in a mouse septic model. As a mechanism of antibacterial activity, PN5 exhibited the membrane permeabilization ability of the toroidal model, and treated strains did not develop drug resistance during serial passages. PN5 showed immunomodulatory properties of neutralizing LPS in a mouse septic model. These results indicate that PN5 could be a new and promising therapeutic agent for bacterial infectious disease caused by antibiotic-resistant strains.
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Affiliation(s)
- Da Dam Kang
- Department of Biomedical Science, Chosun University, Gwangju, South Korea
| | - Jonggwan Park
- Department of Bioinformatics, Kongju National University, Kongju, South Korea
| | - Yoonkyung Park
- Department of Biomedical Science, Chosun University, Gwangju, South Korea
- Research Center for Proteinaceous Materials (RCPM), Chosun University, Gwangju, South Korea
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16
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Wesseling CJ, Martin NI. Synergy by Perturbing the Gram-Negative Outer Membrane: Opening the Door for Gram-Positive Specific Antibiotics. ACS Infect Dis 2022; 8:1731-1757. [PMID: 35946799 PMCID: PMC9469101 DOI: 10.1021/acsinfecdis.2c00193] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
New approaches to target antibacterial agents toward Gram-negative bacteria are key, given the rise of antibiotic resistance. Since the discovery of polymyxin B nonapeptide as a potent Gram-negative outer membrane (OM)-permeabilizing synergist in the early 1980s, a vast amount of literature on such synergists has been published. This Review addresses a range of peptide-based and small organic compounds that disrupt the OM to elicit a synergistic effect with antibiotics that are otherwise inactive toward Gram-negative bacteria, with synergy defined as a fractional inhibitory concentration index (FICI) of <0.5. Another requirement for the inclusion of the synergists here covered is their potentiation of a specific set of clinically used antibiotics: erythromycin, rifampicin, novobiocin, or vancomycin. In addition, we have focused on those synergists with reported activity against Gram-negative members of the ESKAPE family of pathogens namely, Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumoniae, and/or Acinetobacter baumannii. In cases where the FICI values were not directly reported in the primary literature but could be calculated from the published data, we have done so, allowing for more direct comparison of potency with other synergists. We also address the hemolytic activity of the various OM-disrupting synergists reported in the literature, an effect that is often downplayed but is of key importance in assessing the selectivity of such compounds for Gram-negative bacteria.
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17
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Lopes JLS, Araujo CCF, Neves RC, Bürck J, Couto SG. Structural analysis of the peptides temporin-Ra and temporin-Rb and interactions with model membranes. EUROPEAN BIOPHYSICS JOURNAL : EBJ 2022; 51:493-502. [PMID: 35978176 DOI: 10.1007/s00249-022-01615-y] [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: 04/08/2022] [Revised: 07/27/2022] [Accepted: 07/31/2022] [Indexed: 06/15/2023]
Abstract
The skin of amphibians is widely exploited as rich sources of membrane active peptides that differ in chain size, polypeptide net charge, secondary structure, target selectivity and toxicity. In this study, two small antimicrobial peptides, temporin-Ra and temporin-Rb, originally isolated from the skin of the European marsh frog (Rana ridibunda), described as active against pathogen bacteria and presenting low toxicity to eukaryotic cells were synthesized and had their physicochemical properties and mechanism of action investigated. The temporin peptides were examined in aqueous solution and in the presence of membrane models (lipid monolayers, micelles, lipid bilayers and vesicles). A combined approach of bioinformatics analyses, biological activity assays, surface pressure measurements, synchrotron radiation circular dichroism spectroscopy, and oriented circular dichroism spectroscopy were employed. Both peptides were able to adsorb at a lipid-air interface with a negative surface charge density, and efficiently disturb the lipid surface packing. A disorder-to-helix transition was observed on the secondary structure of both peptides when either in a non-polar environment or interacting with model membranes containing a negative net charge density. The binding of both temporin-Ra and temporin-Rb to membrane models is modulated by the presence of negatively charged lipids in the membrane. The amphipathic helix induced in temporin-Ra is oriented parallel to the membrane surface in negatively charged or in zwitterionic lipid bilayers, with no tendency for realignment after binding. Temporin-Rb, instead, assumes a β-sheet conformation when deposited into oriented stacked lipid bilayers. Due to their short size and simple composition, both peptides are quite attractive for the development of new classes of peptide-based anti-infective drugs.
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Affiliation(s)
- José L S Lopes
- Instituto de Física, Universidade de São Paulo, São Paulo, SP, 05080-900, Brazil
| | - Caio C F Araujo
- Faculdade de Medicina, Universidade Federal de Goiás, Goiânia, GO, 74690-900, Brazil
| | - Rogério C Neves
- Instituto de Patologia Tropical E Saúde Pública, Universidade Federal de Goiás, Goiânia, GO, 74605050, Brazil
| | - Jochen Bürck
- Institute of Biological Interfaces (IBG-2), Karlsruhe Institute of Technology (KIT), POB 3640, 76021, Karlsruhe, Germany
| | - Sheila G Couto
- Instituto de Física, Universidade Federal de Goiás, Av. Esperança, s/n - Campus Samambaia, Goiânia, GO, 74690-900, Brazil.
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18
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Lycosin-II Exhibits Antifungal Activity and Inhibits Dual-Species Biofilm by Candida albicans and Staphylococcus aureus. J Fungi (Basel) 2022; 8:jof8090901. [PMID: 36135626 PMCID: PMC9504746 DOI: 10.3390/jof8090901] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 08/21/2022] [Accepted: 08/22/2022] [Indexed: 11/17/2022] Open
Abstract
The increase and dissemination of antimicrobial resistance is a global public health issue. To address this, new antimicrobial agents have been developed. Antimicrobial peptides (AMPs) exhibit a wide range of antimicrobial activities against pathogens, including bacteria and fungi. Lycosin-II, isolated from the venom of the spider Lycosa singoriensis, has shown antibacterial activity by disrupting membranes. However, the mode of action of Lycosin-II and its antifungal activity have not been clearly described. Therefore, we confirmed that Lycosin-II showed antifungal activity against Candida albicans (C. albicans). To investigate the mode of action, membrane-related assays were performed, including an evaluation of C. albicans membrane depolarization and membrane integrity after exposure to Lycosin-II. Our results indicated that Lycosin-II damaged the C. albicans membrane. Additionally, Lycosin-II induced oxidative stress through the generation of reactive oxygen species (ROS) in C. albicans. Moreover, Lycosin-II exhibited an inhibitory effect on dual-species biofilm formation by C. albicans and Staphylococcus aureus (S. aureus), which are the most co-isolated fungi and bacteria. These results revealed that Lycosin-II can be utilized against C. albicans and dual-species strain infections.
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19
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Jayathilaka EHTT, Rajapaksha DC, Nikapitiya C, Lee J, De Zoysa M, Whang I. Novel Antimicrobial Peptide “Octoprohibitin” against Multidrug Resistant Acinetobacter baumannii. Pharmaceuticals (Basel) 2022; 15:ph15080928. [PMID: 36015076 PMCID: PMC9415640 DOI: 10.3390/ph15080928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 07/11/2022] [Accepted: 07/22/2022] [Indexed: 11/16/2022] Open
Abstract
Octoprohibitin is a synthetic antimicrobial peptide (AMP), derived from the prohibitin-2 gene of Octopus minor. It showed substantial activity against multidrug resistant (MDR) Acinetobacter baumannii with a minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of 200 and 400 µg/mL, respectively. Time-kill kinetics and bacterial viability assays confirmed the concentration-dependent antibacterial activity of octoprohibitin against A. baumannii. The morphology and ultrastructure of A. baumannii were altered by treatment with octoprohibitin at the MIC and MBC levels. Furthermore, propidium iodide-fluorescein diacetate (PI-FDA) staining and 2′,7′-dichlorodihydrofluorescein diacetate (H2DCFDA) staining of octoprohibitin-treated A. baumannii revealed membrane permeability alterations and reactive oxygen species (ROS) generation, respectively. Agarose gel retardation results confirmed the DNA-binding ability of octoprohibitin to the genomic DNA of A. baumannii. Furthermore, octoprohibitin showed concentration-dependent inhibition of biofilm formation and eradication. The minimum biofilm inhibition concentration (MBIC) and minimum biofilm eradication concentration (MBEC) of octoprohibitin were 1000 and 1460 µg/mL, respectively. Octoprohibitin produced no significant cytotoxicity up to 800 µg/mL, and no hemolysis was observed up to 400 µg/mL. Furthermore, in vivo analysis in an A. baumannii-infected zebrafish model confirmed the effective bactericidal activity of octoprohibitin with higher cumulative survival percent (46.6%) and fewer pathological signs. Histological analysis showed reduced alterations in the gut, kidney, and gill tissues in the octoprohibitin-treated group compared with those in the phosphate-buffered saline (PBS)-treated group. In conclusion, our results suggest that octoprohibitin is a potential antibacterial and antibiofilm agent against MDR A. baumannii.
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Affiliation(s)
- E. H. T. Thulshan Jayathilaka
- College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon 34134, Korea; (E.H.T.T.J.); (D.C.R.); (C.N.)
| | - Dinusha C. Rajapaksha
- College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon 34134, Korea; (E.H.T.T.J.); (D.C.R.); (C.N.)
| | - Chamilani Nikapitiya
- College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon 34134, Korea; (E.H.T.T.J.); (D.C.R.); (C.N.)
| | - Joeun Lee
- National Marine Biodiversity Institute of Korea (MABIK), 75, Jangsan-ro, 101beon-gil, Janghang-eup 33662, Korea;
| | - Mahanama De Zoysa
- College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon 34134, Korea; (E.H.T.T.J.); (D.C.R.); (C.N.)
- Correspondence: (M.D.Z.); (I.W.)
| | - Ilson Whang
- National Marine Biodiversity Institute of Korea (MABIK), 75, Jangsan-ro, 101beon-gil, Janghang-eup 33662, Korea;
- Correspondence: (M.D.Z.); (I.W.)
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20
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Antibacterial Peptide NP-6 Affects Staphylococcus aureus by Multiple Modes of Action. Int J Mol Sci 2022; 23:ijms23147812. [PMID: 35887160 PMCID: PMC9319634 DOI: 10.3390/ijms23147812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/30/2022] [Accepted: 07/13/2022] [Indexed: 02/01/2023] Open
Abstract
Our previous study extracted and identified an antibacterial peptide that was named NP-6. Herein, we investigated the physicochemical properties of NP-6, and elucidated the mechanisms underlying its antimicrobial activity against Staphylococcus aureus. The results showed that the hemolysis activity of NP-6 was 2.39 ± 0.13%, lower than Nisin A (3.91 ± 0.43%) at the same concentration (512 µg/mL). Negligible cytotoxicity towards RAW264.7 cells was found when the concentration of NP-6 was lower than 512 µg/mL. In addition, it could keep most of its activity in fetal bovine serum. Moreover, transmission electron microscopy, confocal laser scanning microscopy, and flow cytometry results showed that NP-6 can destroy the integrity of the bacterial cell membrane and increase the membrane permeability. Meanwhile, NP-6 had binding activity with bacterial DNA and RNA in vitro and strongly inhibited the intracellular β-galactosidase activity of S. aureus. Our findings suggest that NP-6 could be a promising candidate against S. aureus.
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21
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Lath A, Santal AR, Kaur N, Kumari P, Singh NP. Anti-cancer peptides: their current trends in the development of peptide-based therapy and anti-tumor drugs. Biotechnol Genet Eng Rev 2022; 39:45-84. [PMID: 35699384 DOI: 10.1080/02648725.2022.2082157] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Human cancer remains a cause of high mortality throughout the world. The conventional methods and therapies currently employed for treatment are followed by moderate-to-severe side effects. They have not generated curative results due to the ineffectiveness of treatments. Besides, the associated high costs, technical requirements, and cytotoxicity further characterize their limitations. Due to relatively higher presidencies, bioactive peptides with anti-cancer attributes have recently become treatment choices within the therapeutic arsenal. The peptides act as potential anti-cancer agents explicitly targeting tumor cells while being less toxic to normal cells. The anti-cancer peptides are isolated from various natural sources, exhibit high selectivity and high penetration efficiency, and could be quickly restructured. The therapeutic benefits of compatible anti-cancer peptides have contributed to the significant expansion of cancer treatment; albeit, the mechanisms by which bioactive peptides inhibit the proliferation of tumor cells remain unclear. This review will provide a framework for assessing anti-cancer peptides' structural and functional aspects. It shall provide appropriate information on their mode of action to support and strengthen efforts to improve cancer prevention. The article will mention the therapeutic health benefits of anti-cancer peptides. Their importance in clinical studies is elaborated for reducing cancer incidences and developing sustainable treatment models.
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Affiliation(s)
- Amit Lath
- Centre for Biotechnology, Maharshi Dayanand University, Rohtak, India
| | - Anita Rani Santal
- Department of Microbiology, Maharshi Dayanand University, Rohtak, India
| | - Nameet Kaur
- Amity Institute of Biotechnology, Amity University, Noida, India
| | - Poonam Kumari
- Sophisticated Analytical Instrumentation Facility, CIL and UCIM, Punjab University, Chandigarh, Inida
| | - Nater Pal Singh
- Centre for Biotechnology, Maharshi Dayanand University, Rohtak, India
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22
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Valenti GE, Alfei S, Caviglia D, Domenicotti C, Marengo B. Antimicrobial Peptides and Cationic Nanoparticles: A Broad-Spectrum Weapon to Fight Multi-Drug Resistance Not Only in Bacteria. Int J Mol Sci 2022; 23:ijms23116108. [PMID: 35682787 PMCID: PMC9181033 DOI: 10.3390/ijms23116108] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 05/25/2022] [Accepted: 05/27/2022] [Indexed: 11/16/2022] Open
Abstract
In the last few years, antibiotic resistance and, analogously, anticancer drug resistance have increased considerably, becoming one of the main public health problems. For this reason, it is crucial to find therapeutic strategies able to counteract the onset of multi-drug resistance (MDR). In this review, a critical overview of the innovative tools available today to fight MDR is reported. In this direction, the use of membrane-disruptive peptides/peptidomimetics (MDPs), such as antimicrobial peptides (AMPs), has received particular attention, due to their high selectivity and to their limited side effects. Moreover, similarities between bacteria and cancer cells are herein reported and the hypothesis of the possible use of AMPs also in anticancer therapies is discussed. However, it is important to take into account the limitations that could negatively impact clinical application and, in particular, the need for an efficient delivery system. In this regard, the use of nanoparticles (NPs) is proposed as a potential strategy to improve therapy; moreover, among polymeric NPs, cationic ones are emerging as promising tools able to fight the onset of MDR both in bacteria and in cancer cells.
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Affiliation(s)
- Giulia E. Valenti
- Department of Experimental Medicine (DIMES), General Pathology Section, University of Genoa, 16132 Genoa, Italy; (G.E.V.); (B.M.)
| | - Silvana Alfei
- Department of Pharmacy, University of Genoa, 16148 Genoa, Italy;
| | - Debora Caviglia
- Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Viale Benedetto XV, 6, 16132 Genova, Italy;
| | - Cinzia Domenicotti
- Department of Experimental Medicine (DIMES), General Pathology Section, University of Genoa, 16132 Genoa, Italy; (G.E.V.); (B.M.)
- Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), 56122 Pisa, Italy
- Correspondence: ; Tel.: +39-010-353-8830
| | - Barbara Marengo
- Department of Experimental Medicine (DIMES), General Pathology Section, University of Genoa, 16132 Genoa, Italy; (G.E.V.); (B.M.)
- Inter-University Center for the Promotion of the 3Rs Principles in Teaching & Research (Centro 3R), 56122 Pisa, Italy
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23
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Park HJ, Kang HK, Park E, Kim MK, Park Y. Bactericidal activities and Action mechanism of the Novel Antimicrobial Peptide Hylin a1 and its analog peptides against Acinetobacter baumannii infection. Eur J Pharm Sci 2022; 175:106205. [PMID: 35561952 DOI: 10.1016/j.ejps.2022.106205] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 05/05/2022] [Accepted: 05/09/2022] [Indexed: 11/18/2022]
Abstract
We developed an antimicrobial peptide (AMP) as a candidate substance for replacing antibiotics. Previously, a novel 18-amino acid antimicrobial peptide Hylin a1 was isolated from an electro-stimulated arboreal South American frog Hypsiboas albopunctatus, and was found to demonstrate antimicrobial activity and cytotoxicity. In a recent study, the analog peptides were designed based on the parent peptide Hylin a1 to decrease toxicity and to maintain antimicrobial efficacy. The analog peptides were substituted with alanine and lysine, resulting in the formation of amphipathic α-helical structures in membrane-mimicking environments and in the induction of hydrophobic moments and net charges. Moreover, the analog peptides showed lower hemolytic effects and mammalian cell selectivity than Hylin a1. In particularly Hylin a1-11K and Hylin a1-15K exhibited broad-spectrum antimicrobial activity and anti-biofilm activity against carbapenem-resistant Acinetobacter baumannii. Permeability assays indicated that analog peptides eliminated bacteria by binding to lipopolysaccharide and by disrupting the bacterial membrane. Hylin a1-11K and Hylin a1-15K reduced inflammation by suppressing pro-inflammatory cytokines expression by A. baumannii infection and effectively ameliorated carbapenem-resistant A. baumannii infection in mice. Therefore, our results suggest that the analog peptide substituted with several residues based on Hylin a1 have antibacterial and anti-inflammatory activity, and may be effective in the treatment of carbapenem-resistant A. baumannii infection.
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Affiliation(s)
- Hee Joo Park
- Department of Biomedical Sciences, Chosun University, Gwangju, 61452, Republic of Korea
| | - Hee Kyoung Kang
- Department of Biomedical Sciences, Chosun University, Gwangju, 61452, Republic of Korea
| | - Eunji Park
- Department of Biomedical Sciences, Chosun University, Gwangju, 61452, Republic of Korea
| | - Min Kyung Kim
- Department of Biomedical Sciences, Chosun University, Gwangju, 61452, Republic of Korea
| | - Yoonkyung Park
- Department of Biomedical Sciences, Chosun University, Gwangju, 61452, Republic of Korea; Research Center for Proteineous Materials, Chosun University, Gwangju, 61452, South Korea.
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24
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Law SKK, Tan HS. The Role of Quorum Sensing, Biofilm Formation, and Iron Acquisition as Key Virulence Mechanisms in Acinetobacter baumannii and the Corresponding Anti-virulence Strategies. Microbiol Res 2022; 260:127032. [DOI: 10.1016/j.micres.2022.127032] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 03/31/2022] [Accepted: 04/05/2022] [Indexed: 12/15/2022]
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Roy S, Chowdhury G, Mukhopadhyay AK, Dutta S, Basu S. Convergence of Biofilm Formation and Antibiotic Resistance in Acinetobacter baumannii Infection. Front Med (Lausanne) 2022; 9:793615. [PMID: 35402433 PMCID: PMC8987773 DOI: 10.3389/fmed.2022.793615] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 01/31/2022] [Indexed: 07/30/2023] Open
Abstract
Acinetobacter baumannii (A. baumannii) is a leading cause of nosocomial infections as this pathogen has certain attributes that facilitate the subversion of natural defenses of the human body. A. baumannii acquires antibiotic resistance determinants easily and can thrive on both biotic and abiotic surfaces. Different resistance mechanisms or determinants, both transmissible and non-transmissible, have aided in this victory over antibiotics. In addition, the propensity to form biofilms (communities of organism attached to a surface) allows the organism to persist in hospitals on various medical surfaces (cardiac valves, artificial joints, catheters, endotracheal tubes, and ventilators) and also evade antibiotics simply by shielding the bacteria and increasing its ability to acquire foreign genetic material through lateral gene transfer. The biofilm formation rate in A. baumannii is higher than in other species. Recent research has shown how A. baumannii biofilm-forming capacity exerts its effect on resistance phenotypes, development of resistome, and dissemination of resistance genes within biofilms by conjugation or transformation, thereby making biofilm a hotspot for genetic exchange. Various genes control the formation of A. baumannii biofilms and a beneficial relationship between biofilm formation and "antimicrobial resistance" (AMR) exists in the organism. This review discusses these various attributes of the organism that act independently or synergistically to cause hospital infections. Evolution of AMR in A. baumannii, resistance mechanisms including both transmissible (hydrolyzing enzymes) and non-transmissible (efflux pumps and chromosomal mutations) are presented. Intrinsic factors [biofilm-associated protein, outer membrane protein A, chaperon-usher pilus, iron uptake mechanism, poly-β-(1, 6)-N-acetyl glucosamine, BfmS/BfmR two-component system, PER-1, quorum sensing] involved in biofilm production, extrinsic factors (surface property, growth temperature, growth medium) associated with the process, the impact of biofilms on high antimicrobial tolerance and regulation of the process, gene transfer within the biofilm, are elaborated. The infections associated with colonization of A. baumannii on medical devices are discussed. Each important device-related infection is dealt with and both adult and pediatric studies are separately mentioned. Furthermore, the strategies of preventing A. baumannii biofilms with antibiotic combinations, quorum sensing quenchers, natural products, efflux pump inhibitors, antimicrobial peptides, nanoparticles, and phage therapy are enumerated.
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Affiliation(s)
- Subhasree Roy
- Division of Bacteriology, Indian Council of Medical Research (ICMR)-National Institute of Cholera and Enteric Diseases, Kolkata, India
| | - Goutam Chowdhury
- Division of Molecular Microbiology, Indian Council of Medical Research (ICMR)-National Institute of Cholera and Enteric Diseases, Kolkata, India
| | - Asish K. Mukhopadhyay
- Division of Molecular Microbiology, Indian Council of Medical Research (ICMR)-National Institute of Cholera and Enteric Diseases, Kolkata, India
| | - Shanta Dutta
- Division of Bacteriology, Indian Council of Medical Research (ICMR)-National Institute of Cholera and Enteric Diseases, Kolkata, India
| | - Sulagna Basu
- Division of Bacteriology, Indian Council of Medical Research (ICMR)-National Institute of Cholera and Enteric Diseases, Kolkata, India
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26
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Antimicrobial Peptides as an Alternative for the Eradication of Bacterial Biofilms of Multi-Drug Resistant Bacteria. Pharmaceutics 2022; 14:pharmaceutics14030642. [PMID: 35336016 PMCID: PMC8950055 DOI: 10.3390/pharmaceutics14030642] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 03/05/2022] [Accepted: 03/10/2022] [Indexed: 12/03/2022] Open
Abstract
Bacterial resistance is an emergency public health problem worldwide, compounded by the ability of bacteria to form biofilms, mainly in seriously ill hospitalized patients. The World Health Organization has published a list of priority bacteria that should be studied and, in turn, has encouraged the development of new drugs. Herein, we explain the importance of studying new molecules such as antimicrobial peptides (AMPs) with potential against multi-drug resistant (MDR) and extensively drug-resistant (XDR) bacteria and focus on the inhibition of biofilm formation. This review describes the main causes of antimicrobial resistance and biofilm formation, as well as the main and potential AMP applications against these bacteria. Our results suggest that the new biomacromolecules to be discovered and studied should focus on this group of dangerous and highly infectious bacteria. Alternative molecules such as AMPs could contribute to eradicating biofilm proliferation by MDR/XDR bacteria; this is a challenging undertaking with promising prospects.
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27
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Wichmann N, Lund PM, Hansen MB, Hjørringgaard CU, Larsen JB, Kristensen K, Andresen TL, Simonsen JB. Applying flow cytometry to identify the modes of action of membrane-active peptides in a label-free and high-throughput fashion. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2022; 1864:183820. [PMID: 34813768 DOI: 10.1016/j.bbamem.2021.183820] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 10/29/2021] [Accepted: 11/12/2021] [Indexed: 06/13/2023]
Abstract
Membrane-active peptides (MAPs) have several potential therapeutic uses, including as antimicrobial drugs. Many traditional methods used to evaluate the membrane interactions of MAPs have limited applicability. Low-throughput methods, such as microscopy, provide detailed information but often rely on fluorophore-labeled MAPs, and high-throughput assays, such as the calcein release assay, cannot assess the mechanism behind the disruption of vesicular-based lipid membranes. Here we present a flow cytometric assay that provides detailed information about the peptide-lipid membrane interactions on single artificial lipid vesicles while being high-throughput (1000-2000 vesicles/s) and based on label-free MAPs. We synthesized and investigated six MAPs with different modes of action to evaluate the versatility of the assay. The assay is based on the flow cytometric readouts from artificial lipid vesicles, including the fluorescence from membrane-anchored and core-encapsulated fluorophores, and the vesicle concentration. From these parameters, we were able to distinguish between MAPs that induce vesicle solubilization, permeation (pores/membrane distortion), and aggregation or fusion. Our flow cytometry findings have been verified by traditional methods, including the calcein release assay, dynamic light scattering, and fluorescence microscopy on giant unilamellar vesicles. We envision that the presented flow cytometric assay can be used for various types of peptide-lipid membrane studies, e.g. to identify new antibiotics. Moreover, the assay can easily be expanded to derive additional valuable information.
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Affiliation(s)
- Nanna Wichmann
- Department of Health Technology, Center for Intestinal Absorption and Transport of Biopharmaceuticals, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Philip M Lund
- Department of Health Technology, Center for Intestinal Absorption and Transport of Biopharmaceuticals, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Morten B Hansen
- Department of Health Technology, Center for Intestinal Absorption and Transport of Biopharmaceuticals, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Claudia U Hjørringgaard
- Department of Health Technology, Center for Intestinal Absorption and Transport of Biopharmaceuticals, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Jannik B Larsen
- Department of Health Technology, Center for Intestinal Absorption and Transport of Biopharmaceuticals, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Kasper Kristensen
- Department of Health Technology, Center for Intestinal Absorption and Transport of Biopharmaceuticals, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Thomas L Andresen
- Department of Health Technology, Center for Intestinal Absorption and Transport of Biopharmaceuticals, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark.
| | - Jens B Simonsen
- Department of Health Technology, Center for Intestinal Absorption and Transport of Biopharmaceuticals, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark.
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28
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Zhang Y, Yu J, Zhang H, Li Y, Wang L. Nanofibrous dressing: Potential alternative for fighting against antibiotic‐resistance wound infections. J Appl Polym Sci 2022. [DOI: 10.1002/app.52178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yingjie Zhang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles Donghua University Shanghai China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology Donghua University Shanghai China
| | - Juan Yu
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles Donghua University Shanghai China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology Donghua University Shanghai China
| | - Huiru Zhang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles Donghua University Shanghai China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology Donghua University Shanghai China
| | - Yan Li
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles Donghua University Shanghai China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology Donghua University Shanghai China
| | - Lu Wang
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles Donghua University Shanghai China
- Key Laboratory of Textile Industry for Biomedical Textile Materials and Technology Donghua University Shanghai China
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29
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Kaushik V, Tiwari M, Joshi R, Tiwari V. Therapeutic strategies against potential antibiofilm targets of multidrug-resistant Acinetobacter baumannii. J Cell Physiol 2022; 237:2045-2063. [PMID: 35083758 DOI: 10.1002/jcp.30683] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 11/30/2021] [Accepted: 01/07/2022] [Indexed: 12/12/2022]
Abstract
Acinetobacter baumannii is the causative agent of various hospital-acquired infections. Biofilm formation is one of the various antimicrobial resistance (AMR) strategies and is associated with high mortality and morbidity. Hence, it is essential to review the potential antibiofilm targets in A. baumannii and come up with different strategies to combat these potential targets. This review covers different pathways involved in the regulation of biofilm formation in A. baumannii like quorum sensing (QS), cyclic-di-GMP signaling, two-component system (TCS), outer-membrane protein (ompA), and biofilm-associated protein (BAP). A newly discovered mechanism of electrical signaling-mediated biofilm formation and contact-dependent biofilm modulation has also been discussed. As biofilm formation and its maintenance in A. baumannii is facilitated by these potential targets, the detailed study of these targets and pathways can bring light to different therapeutic strategies such as anti-biofilm peptides, natural and synthetic molecule inhibitors, QS molecule degrading enzymes, and other strategies. These strategies may help in suppressing the lethality of biofilm-mediated infections. Targeting essential proteins/targets which are crucial for biofilm formation and regulation may render new therapeutic strategies that can aid in combating biofilm, thus reducing the recalcitrant infections and morbidity associated with the biofilm of A. baumannii.
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Affiliation(s)
- Vaishali Kaushik
- Department of Biochemistry, Central University of Rajasthan, Ajmer, India
| | - Monalisa Tiwari
- Department of Biochemistry, Central University of Rajasthan, Ajmer, India
| | - Richa Joshi
- Department of Biochemistry, Central University of Rajasthan, Ajmer, India
| | - Vishvanath Tiwari
- Department of Biochemistry, Central University of Rajasthan, Ajmer, India
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30
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The Broad-Spectrum Antiviral Potential of the Amphibian Peptide AR-23. Int J Mol Sci 2022; 23:ijms23020883. [PMID: 35055066 PMCID: PMC8779559 DOI: 10.3390/ijms23020883] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 01/10/2022] [Accepted: 01/11/2022] [Indexed: 12/23/2022] Open
Abstract
Viral infections represent a serious threat to the world population and are becoming more frequent. The search and identification of broad-spectrum antiviral molecules is necessary to ensure new therapeutic options, since there is a limited availability of effective antiviral drugs able to eradicate viral infections, and consequently due to the increase of strains that are resistant to the most used drugs. Recently, several studies on antimicrobial peptides identified them as promising antiviral agents. In detail, amphibian skin secretions serve as a rich source of natural antimicrobial peptides. Their antibacterial and antifungal activities have been widely reported, but their exploitation as potential antiviral agents have yet to be fully investigated. In the present study, the antiviral activity of the peptide derived from the secretion of Rana tagoi, named AR-23, was evaluated against both DNA and RNA viruses, with or without envelope. Different assays were performed to identify in which step of the infectious cycle the peptide could act. AR-23 exhibited a greater inhibitory activity in the early stages of infection against both DNA (HSV-1) and RNA (MeV, HPIV-2, HCoV-229E, and SARS-CoV-2) enveloped viruses and, on the contrary, it was inactive against naked viruses (PV-1). Altogether, the results indicated AR-23 as a peptide with potential therapeutic effects against a wide variety of human viruses.
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31
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Tian T, Xie W, Liu L, Fan S, Zhang H, Qin Z, Yang C. Industrial application of antimicrobial peptides based on their biological activity and structure-activity relationship. Crit Rev Food Sci Nutr 2021:1-16. [PMID: 34955061 DOI: 10.1080/10408398.2021.2019673] [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: 10/19/2022]
Abstract
Last several years, a rapid increase in drug resistance to traditional antibiotics has driven the emergence and development of antimicrobial peptides (AMPs). AMPs have also gained considerable attention from scientists due to their high potency in combatting infectious pathogens. A subset of analogues and their derivatives with specific targets have been successfully designed based on natural peptide patterns. In this review, scientific knowledge on the mechanisms of action related to biological activity and structure-activity relationship (SAR) of AMPs are summarized, and the biological applications in several important fields are critically discussed. SAR shows that the positive charge, secondary structure, special amino acid residues, hydrophobicity, and helicity of AMPs are closely related to their biological activities. The combination of nanotechnology, bioinformatics, and genetic engineering can accelerate to achieve the application of AMPs as effective, safe, economical, and nonresistant antimicrobial agents in medicine, the food and feed industries, and agriculture in coming years. Given the intense interest in AMPs, further investigations are needed in the future to evaluate the specific structure and function that make their use favorable in several industries. This review may provide a comprehensive reference for future studies on chemical modifications, mechanistic exploration, and applications of AMPs.
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Affiliation(s)
- Tiantian Tian
- Center for Biological Science and Technology, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai, Guangdong 519087, China
| | - Wansheng Xie
- Hainan Center for Drug and Medical Device Evaluation and Service, Hainan Provincial Drug Administration, Haikou, Hainan, China
| | - Luxuan Liu
- Center for Biological Science and Technology, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai, Guangdong 519087, China
| | - Siting Fan
- Center for Biological Science and Technology, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai, Guangdong 519087, China
| | - Heqian Zhang
- Center for Biological Science and Technology, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai, Guangdong 519087, China
| | - Zhiwei Qin
- Center for Biological Science and Technology, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai, Guangdong 519087, China
| | - Chao Yang
- Center for Biological Science and Technology, Advanced Institute of Natural Sciences, Beijing Normal University at Zhuhai, Zhuhai, Guangdong 519087, China.,State Key Laboratory of Quality Research in Chinese Medicine/Macau Institute for Applied research in Medicine and Health, University of Science and Technology, Taipa, Macao, China
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32
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Natural Peptides Inducing Cancer Cell Death: Mechanisms and Properties of Specific Candidates for Cancer Therapeutics. Molecules 2021; 26:molecules26247453. [PMID: 34946535 PMCID: PMC8708364 DOI: 10.3390/molecules26247453] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/05/2021] [Accepted: 12/07/2021] [Indexed: 01/10/2023] Open
Abstract
Nowadays, cancer has become the second highest leading cause of death, and it is expected to continue to affect the population in forthcoming years. Additionally, treatment options will become less accessible to the public as cases continue to grow and disease mechanisms expand. Hence, specific candidates with confirmed anticancer effects are required to develop new drugs. Among the novel therapeutic options, proteins are considered a relevant source, given that they have bioactive peptides encrypted within their sequences. These bioactive peptides, which are molecules consisting of 2–50 amino acids, have specific activities when administered, producing anticancer effects. Current databases report the effects of peptides. However, uncertainty is found when their molecular mechanisms are investigated. Furthermore, analyses addressing their interaction networks or their directly implicated mechanisms are needed to elucidate their effects on cancer cells entirely. Therefore, relevant peptides considered as candidates for cancer therapeutics with specific sequences and known anticancer mechanisms were accurately reviewed. Likewise, those features which turn certain peptides into candidates and the mechanisms by which peptides mediate tumor cell death were highlighted. This information will make robust the knowledge of these candidate peptides with recognized mechanisms and enhance their non-toxic capacity in relation to healthy cells and further avoid cell resistance.
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33
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Trinidad-Calderón PA, Varela-Chinchilla CD, García-Lara S. Natural Peptides Inducing Cancer Cell Death: Mechanisms and Properties of Specific Candidates for Cancer Therapeutics. Molecules 2021. [DOI: https://doi.org/10.3390/molecules26247453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Nowadays, cancer has become the second highest leading cause of death, and it is expected to continue to affect the population in forthcoming years. Additionally, treatment options will become less accessible to the public as cases continue to grow and disease mechanisms expand. Hence, specific candidates with confirmed anticancer effects are required to develop new drugs. Among the novel therapeutic options, proteins are considered a relevant source, given that they have bioactive peptides encrypted within their sequences. These bioactive peptides, which are molecules consisting of 2–50 amino acids, have specific activities when administered, producing anticancer effects. Current databases report the effects of peptides. However, uncertainty is found when their molecular mechanisms are investigated. Furthermore, analyses addressing their interaction networks or their directly implicated mechanisms are needed to elucidate their effects on cancer cells entirely. Therefore, relevant peptides considered as candidates for cancer therapeutics with specific sequences and known anticancer mechanisms were accurately reviewed. Likewise, those features which turn certain peptides into candidates and the mechanisms by which peptides mediate tumor cell death were highlighted. This information will make robust the knowledge of these candidate peptides with recognized mechanisms and enhance their non-toxic capacity in relation to healthy cells and further avoid cell resistance.
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34
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Bin Hafeez A, Jiang X, Bergen PJ, Zhu Y. Antimicrobial Peptides: An Update on Classifications and Databases. Int J Mol Sci 2021; 22:11691. [PMID: 34769122 PMCID: PMC8583803 DOI: 10.3390/ijms222111691] [Citation(s) in RCA: 87] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/24/2021] [Accepted: 10/25/2021] [Indexed: 02/06/2023] Open
Abstract
Antimicrobial peptides (AMPs) are distributed across all kingdoms of life and are an indispensable component of host defenses. They consist of predominantly short cationic peptides with a wide variety of structures and targets. Given the ever-emerging resistance of various pathogens to existing antimicrobial therapies, AMPs have recently attracted extensive interest as potential therapeutic agents. As the discovery of new AMPs has increased, many databases specializing in AMPs have been developed to collect both fundamental and pharmacological information. In this review, we summarize the sources, structures, modes of action, and classifications of AMPs. Additionally, we examine current AMP databases, compare valuable computational tools used to predict antimicrobial activity and mechanisms of action, and highlight new machine learning approaches that can be employed to improve AMP activity to combat global antimicrobial resistance.
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Affiliation(s)
- Ahmer Bin Hafeez
- Centre of Biotechnology and Microbiology, University of Peshawar, Peshawar 25120, Pakistan;
| | - Xukai Jiang
- Infection and Immunity Program, Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; (X.J.); (P.J.B.)
- National Glycoengineering Research Center, Shandong University, Qingdao 266237, China
| | - Phillip J. Bergen
- Infection and Immunity Program, Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; (X.J.); (P.J.B.)
| | - Yan Zhu
- Infection and Immunity Program, Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; (X.J.); (P.J.B.)
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Rajapaksha DC, Jayathilaka EHTT, Edirisinghe SL, Nikapitiya C, Lee J, Whang I, De Zoysa M. Octopromycin: Antibacterial and antibiofilm functions of a novel peptide derived from Octopus minor against multidrug-resistant Acinetobacter baumannii. FISH & SHELLFISH IMMUNOLOGY 2021; 117:82-94. [PMID: 34311097 DOI: 10.1016/j.fsi.2021.07.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 06/28/2021] [Accepted: 07/22/2021] [Indexed: 06/13/2023]
Abstract
The emergence of carbapenem-resistant Acinetobacter baumannii has increased the risk of nosocomial infections, which pose a huge health threat. There is an urgent need to develop alternative therapies, including broad-spectrum antimicrobial peptides. In this study, we designed, characterized, and studied the antibacterial, antibiofilm effects and possible mode of actions of a novel synthetic peptide Octopromycin, derived from the proline-rich protein 5 of Octopus minor. Octopromycin consists of 38 amino acids, (+5) net positive charge, high hydrophobic residue ratio (36%), and two α-helix secondary structures. The minimum inhibitory concentration and minimum bactericidal concentration against A. baumannii were 50 and 200 μg/mL, respectively. Time-kill kinetics and bacterial viability assays confirmed the concentration-dependent antibacterial activity of Octopromycin. Field emission scanning electron microscopy images clearly showed ultrastructural alterations in Octopromycin-treated A. baumannii cells. Propidium iodide penetrated into Octopromycin-treated A. baumannii cells, demonstrating the loss of cell membrane integrity. Octopromycin treatment increased the production of reactive oxygen species in a concentration-dependent manner, and it inhibited the biofilm formation and showed biofilm eradication activity against A. baumannii. In vitro and in vivo safety evaluation revealed that Octopromycin was nontoxic to HEK293T and Raw 264.7 cells (<400 μg/mL), as well as mice red blood cells (<300 μg/mL), and zebrafish embryos (<4 μg/mL). An in vivo study results revealed that the A. baumannii-infected fish treated with Octopromycin exhibited a significantly higher relative percent survival (37.5%) than the infected mock-treated fish with PBS (16.6%). Furthermore, a decreased bacterial load and fewer alterations in histological analysis confirmed the successful control of A. baumannii by Octopromycin in vivo. Collectively, the results indicate that the antibacterial peptide Octopromycin may achieve rapid control of A. baumannii through multi-target interactions; it presents a desirable therapeutic option for the prevention and control of the infections.
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Affiliation(s)
- D C Rajapaksha
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - E H T Thulshan Jayathilaka
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - S L Edirisinghe
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - Chamilani Nikapitiya
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - Joeun Lee
- National Marine Biodiversity Institute of Korea (MABIK), 75, Jangsan-ro 101beon-gil, Janghang-eup, Seochun-gun, Chungchungnam-do, 33662, Republic of Korea
| | - Ilson Whang
- National Marine Biodiversity Institute of Korea (MABIK), 75, Jangsan-ro 101beon-gil, Janghang-eup, Seochun-gun, Chungchungnam-do, 33662, Republic of Korea.
| | - Mahanama De Zoysa
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea.
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Oliveira CS, Torres MDT, Pedron CN, Andrade VB, Silva PI, Silva FD, de la Fuente-Nunez C, Oliveira VX. Synthetic Peptide Derived from Scorpion Venom Displays Minimal Toxicity and Anti-infective Activity in an Animal Model. ACS Infect Dis 2021; 7:2736-2745. [PMID: 34463484 DOI: 10.1021/acsinfecdis.1c00261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Multidrug-resistant bacteria represent a global health problem increasingly leading to infections that are untreatable with our existing antibiotic arsenal. Therefore, it is critical to identify novel effective antimicrobials. Venoms represent an underexplored source of potential antibiotic molecules. Here, we engineered a peptide (IsCT1-NH2) derived from the venom of the scorpion Opisthacanthus madagascariensis, whose application as an antimicrobial had been traditionally hindered by its high toxicity. Through peptide design and the knowledge obtained in preliminary studies with single and double-substituted analogs, we engineered IsCT1 derivatives with multiple amino acid substitutions to assess the impact of net charge on antimicrobial activity and toxicity. We demonstrate that increased net charge (from +3 to +6) significantly reduced toxicity toward human erythrocytes. Our lead synthetic peptide, [A]1[K]3[F]5[K]8-IsCT1-NH2 (net charge of +4), exhibited increased antimicrobial activity against Gram-negative and Gram-positive bacteria in vitro and enhanced anti-infective activity in a mouse model. Mechanism of action studies revealed that the increased antimicrobial activity of our lead molecule was due, at least in part, to its enhanced ability to permeabilize the outer membrane and depolarize the cytoplasmic membrane. In summary, we describe a simple method based on net charge tuning to turn highly toxic venom-derived peptides into viable therapeutics.
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Affiliation(s)
- Cyntia Silva Oliveira
- Escola Paulista de Medicina, Programa de pós-graduação em Biologia Molecular, Universidade Federal de São Paulo, São Paulo, SP 04044020, Brazil
| | - Marcelo Der Torossian Torres
- Machine Biology Group, Departments of Psychiatry and Microbiology, Institute for Biomedical Informatics, Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Departments of Bioengineering and Chemical and Biomolecular Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Penn Institute for Computational Science, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Cibele Nicolaski Pedron
- Escola Paulista de Medicina, Programa de pós-graduação em Biologia Molecular, Universidade Federal de São Paulo, São Paulo, SP 04044020, Brazil
| | - Viviane Brito Andrade
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP 09210580, Brazil
| | - Pedro Ismael Silva
- Instituto Butantan, Laboratório Especial de Toxinologia Aplicada, São Paulo, SP 05503900, Brazil
| | - Fernanda Dias Silva
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP 09210580, Brazil
| | - Cesar de la Fuente-Nunez
- Machine Biology Group, Departments of Psychiatry and Microbiology, Institute for Biomedical Informatics, Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Departments of Bioengineering and Chemical and Biomolecular Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
- Penn Institute for Computational Science, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Vani Xavier Oliveira
- Escola Paulista de Medicina, Programa de pós-graduação em Biologia Molecular, Universidade Federal de São Paulo, São Paulo, SP 04044020, Brazil
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Santo André, SP 09210580, Brazil
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Afonso AC, Oliveira D, Saavedra MJ, Borges A, Simões M. Biofilms in Diabetic Foot Ulcers: Impact, Risk Factors and Control Strategies. Int J Mol Sci 2021; 22:8278. [PMID: 34361044 PMCID: PMC8347492 DOI: 10.3390/ijms22158278] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 07/28/2021] [Accepted: 07/29/2021] [Indexed: 12/13/2022] Open
Abstract
Diabetic foot ulcers (DFUs) are a serious complication from diabetes mellitus, with a huge economic, social and psychological impact on the patients' life. One of the main reasons why DFUs are so difficult to heal is related to the presence of biofilms. Biofilms promote wound inflammation and a remarkable lack of response to host defences/treatment options, which can lead to disease progression and chronicity. In fact, appropriate treatment for the elimination of these microbial communities can prevent the disease evolution and, in some cases, even avoid more serious outcomes, such as amputation or death. However, the detection of biofilm-associated DFUs is difficult due to the lack of methods for diagnostics in clinical settings. In this review, the current knowledge on the involvement of biofilms in DFUs is discussed, as well as how the surrounding environment influences biofilm formation and regulation, along with its clinical implications. A special focus is also given to biofilm-associated DFU diagnosis and therapeutic strategies. An overview on promising alternative therapeutics is provided and an algorithm considering biofilm detection and treatment is proposed.
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Affiliation(s)
- Ana C. Afonso
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal; (A.C.A.); (D.O.); (A.B.)
- CITAB—Centre for the Research and Technology for Agro-Environment and Biological Sciences, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal;
- CEB—Centre of Biological Engineering, Campus de Gualtar, University of Minho, 4710-057 Braga, Portugal
| | - Diana Oliveira
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal; (A.C.A.); (D.O.); (A.B.)
- CIQUP, Department of Chemistry and Biochemistry, Faculty of Sciences, University of Porto, Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal
| | - Maria José Saavedra
- CITAB—Centre for the Research and Technology for Agro-Environment and Biological Sciences, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal;
- Department of Veterinary Sciences, School of Agrarian and Veterinary Sciences, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal
| | - Anabela Borges
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal; (A.C.A.); (D.O.); (A.B.)
| | - Manuel Simões
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal; (A.C.A.); (D.O.); (A.B.)
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Hong MJ, Kim MK, Park Y. Comparative Antimicrobial Activity of Hp404 Peptide and Its Analogs against Acinetobacter baumannii. Int J Mol Sci 2021; 22:ijms22115540. [PMID: 34073939 PMCID: PMC8197367 DOI: 10.3390/ijms22115540] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/07/2021] [Accepted: 05/19/2021] [Indexed: 12/24/2022] Open
Abstract
An amphipathic α-helical peptide, Hp1404, was isolated from the venomous gland of the scorpion Heterometrus petersii. Hp1404 exhibits antimicrobial activity against methicillin-resistant Staphylococcus aureus but is cytotoxic. In this study, we designed antimicrobial peptides by substituting amino acids at the 14 C-terminal residues of Hp1404 to reduce toxicity and improve antibacterial activity. The analog peptides, which had an amphipathic α-helical structure, were active against gram-positive and gram-negative bacteria, particularly multidrug-resistant Acinetobacter baumannii, and showed lower cytotoxicity than Hp1404. N-phenyl-1-naphthylamine uptake and DisC3-5 assays demonstrated that the peptides kill bacteria by effectively permeating the outer and cytoplasmic membranes. Additionally, the analog peptides inhibited biofilm formation largely than Hp1404 at low concentrations. These results suggest that the analog peptides of Hp1404 can be used as therapeutic agents against A. baumannii infection.
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Affiliation(s)
- Min Ji Hong
- Department of Biomedical Sciences, Chosun University, Gwangju 61452, Korea; (M.J.H.); (M.K.K.)
| | - Min Kyung Kim
- Department of Biomedical Sciences, Chosun University, Gwangju 61452, Korea; (M.J.H.); (M.K.K.)
| | - Yoonkyung Park
- Department of Biomedical Sciences, Chosun University, Gwangju 61452, Korea; (M.J.H.); (M.K.K.)
- Research Center for Proteineous Materials, Chosun University, Gwangju 61452, Korea
- Correspondence: ; Tel.: +82-62-230-6854; Fax: +82-62-225-6758
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Jayathilaka EHTT, Rajapaksha DC, Nikapitiya C, De Zoysa M, Whang I. Antimicrobial and Anti-Biofilm Peptide Octominin for Controlling Multidrug-Resistant Acinetobacter baumannii. Int J Mol Sci 2021; 22:ijms22105353. [PMID: 34069596 PMCID: PMC8161146 DOI: 10.3390/ijms22105353] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/12/2021] [Accepted: 05/14/2021] [Indexed: 12/13/2022] Open
Abstract
Acinetobacter baumannii is a serious nosocomial pathogen with multiple drug resistance (MDR), the control of which has become challenging due to the currently used antibiotics. Our main objective in this study is to determine the antibacterial and antibiofilm activities of the antimicrobial peptide, Octominin, against MDR A. baumannii and derive its possible modes of actions. Octominin showed significant bactericidal effects at a low minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) of 5 and 10 µg/mL, respectively. Time-kill kinetic analysis and bacterial viability tests revealed that Octominin showed a concentration-dependent antibacterial activity. Field-emission scanning electron microscopy (FE-SEM) analysis revealed that Octominin treatment altered the morphology and membrane structure of A. baumannii. Propidium iodide (PI) and reactive oxygen species (ROS) generation assays showed that Octominin increased the membrane permeability and ROS generation in A. baumannii, thereby causing bacterial cell death. Further, a lipopolysaccharides (LPS) binding assay showed an Octominin concentration-dependent LPS neutralization ability. Biofilm formation inhibition and eradication assays further revealed that Octominin inhibited biofilm formation and showed a high biofilm eradication activity against A. baumannii. Furthermore, up to a concentration of 100 µg/mL, Octominin caused no hemolysis and cell viability changes in mammalian cells. An in vivo study in zebrafish showed that the Octominin-treated group had a significantly higher relative percentage survival (54.1%) than the untreated group (16.6%). Additionally, a reduced bacterial load and fewer alterations in histological analysis confirmed the successful control of A. baumannii by Octominin in vivo. Collectively, these data suggest that Octominin exhibits significant antibacterial and antibiofilm activities against the multidrug-resistant A. baumannii, and this AMP can be developed further as a potent AMP for the control of antibiotic resistance.
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Affiliation(s)
- E. H. T. Thulshan Jayathilaka
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon 34134, Korea; (E.H.T.T.J.); (D.C.R.); (C.N.)
| | - Dinusha C. Rajapaksha
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon 34134, Korea; (E.H.T.T.J.); (D.C.R.); (C.N.)
| | - Chamilani Nikapitiya
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon 34134, Korea; (E.H.T.T.J.); (D.C.R.); (C.N.)
| | - Mahanama De Zoysa
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon 34134, Korea; (E.H.T.T.J.); (D.C.R.); (C.N.)
- Correspondence: (M.D.Z.); (I.W.)
| | - Ilson Whang
- National Marine Biodiversity Institute of Korea (MABIK), 75, Jangsan-ro 101 beon-gil, Janghang-eup, Seochun-gun, Chungchungnam-do 33662, Korea
- Correspondence: (M.D.Z.); (I.W.)
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Potent Antimicrobial and Antibiofilm Activities of Feleucin-K3 Analogs Modified by α-(4-Pentenyl)-Ala against Multidrug-Resistant Bacteria. Biomolecules 2021; 11:biom11050761. [PMID: 34069651 PMCID: PMC8160793 DOI: 10.3390/biom11050761] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 05/13/2021] [Accepted: 05/16/2021] [Indexed: 01/16/2023] Open
Abstract
The dramatic increase in antimicrobial resistance (AMR) highlights an urgent need to develop new antimicrobial therapies. Thus, antimicrobial peptides (AMPs) have emerged as promising novel antibiotic alternatives. Feleucin-K3 is an amphiphilic α-helical nonapeptide that has powerful antimicrobial activity. In our previous study, it was found that the fourth residue of Feleucin-K3 is important for antimicrobial activity. After α-(4-pentenyl)-Ala was introduced into this position, both the antimicrobial activity and stability were greatly improved. Herein, to improve the limitations of Feleucin-K3, this unnatural amino acid was further introduced into different positions of Feleucin-K3. Among these synthetic Feleucin-K3 analogs, the N-terminal-substituted analog Feleucin-K65 (K65) and C-terminal-substituted analog Feleucin-K70 (K70) had preferable antimicrobial activity. In particular, their antimicrobial activities against multidrug-resistant bacteria were more potent than that of antibiotics. The stabilities of these peptides in salt and serum environments were improved compared with those of Feleucin-K3. In addition, these analogs had low hemolytic activity and AMR. More importantly, they effectively inhibited biofilm formation and exhibited considerable efficacy compared with traditional antibiotics against biofilm infection caused by methicillin-resistant Staphylococcus aureus (MRSA). In antimicrobial mechanism studies, K65 and K70 mainly permeated the outer membrane and depolarized the cytoplasmic membrane, resulting in cellular component leakage and cell death. In summary, analogs K65 and K70 are potential antimicrobial alternatives to solve the antibiotic crisis.
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Greer HM, Overton K, Ferguson MA, Spain EM, Darling LEO, Núñez ME, Volle CB. Extracellular Polymeric Substance Protects Some Cells in an Escherichia coli Biofilm from the Biomechanical Consequences of Treatment with Magainin 2. Microorganisms 2021; 9:microorganisms9050976. [PMID: 33946431 PMCID: PMC8147140 DOI: 10.3390/microorganisms9050976] [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: 04/07/2021] [Revised: 04/26/2021] [Accepted: 04/29/2021] [Indexed: 11/16/2022] Open
Abstract
Bacterial biofilms have long been recognized as a source of persistent infections and industrial contamination with their intransigence generally attributed to their protective layer of extracellular polymeric substances (EPS). EPS, consisting of secreted nucleic acids, proteins, and polysaccharides, make it difficult to fully eliminate biofilms by conventional chemical or physical means. Since most bacteria are capable of forming biofilms, understanding how biofilms respond to new antibiotic compounds and components of the immune system has important ramifications. Antimicrobial peptides (AMPs) are both potential novel antibiotic compounds and part of the immune response in many different organisms. Here, we use atomic force microscopy to investigate the biomechanical changes that occur in individual cells when a biofilm is exposed to the AMP magainin 2 (MAG2), which acts by permeabilizing bacterial membranes. While MAG2 is able to prevent biofilm initiation, cells in an established biofilm can withstand exposure to high concentrations of MAG2. Treated cells in the biofilm are classified into two distinct populations after treatment: one population of cells is indistinguishable from untreated cells, maintaining cellular turgor pressure and a smooth outer surface, and the second population of cells are softer than untreated cells and have a rough outer surface after treatment. Notably, the latter population is similar to planktonic cells treated with MAG2. The EPS likely reduces the local MAG2 concentration around the stiffer cells since once the EPS was enzymatically removed, all cells became softer and had rough outer surfaces. Thus, while MAG2 appears to have the same mechanism of action in biofilm cells as in planktonic ones, MAG2 cannot eradicate a biofilm unless coupled with the removal of the EPS.
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Affiliation(s)
- Helen M. Greer
- Department of Biology, Cottey College, Nevada, MO 64772, USA; (H.M.G.); (K.O.)
| | - Kanesha Overton
- Department of Biology, Cottey College, Nevada, MO 64772, USA; (H.M.G.); (K.O.)
| | - Megan A. Ferguson
- Department of Chemistry, State University of New York, New Paltz, NY 12561, USA;
| | - Eileen M. Spain
- Department of Chemistry, Occidental College, Los Angeles, CA 90041, USA;
| | - Louise E. O. Darling
- Department of Biological Sciences and Program in Biochemistry, Wellesley College, Wellesley, MA 02481, USA;
| | - Megan E. Núñez
- Department of Chemistry and Program in Biochemistry, Wellesley College, Wellesley, MA 02481, USA;
| | - Catherine B. Volle
- Departments of Biology and Chemistry, Cornell College, Mount Vernon, IA 52314, USA
- Correspondence: ; Tel.: +1-(319)-895-4413
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42
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Bamunuarachchi NI, Khan F, Kim YM. Inhibition of Virulence Factors and Biofilm Formation of Acinetobacter Baumannii by Naturally-derived and Synthetic Drugs. Curr Drug Targets 2021; 22:734-759. [PMID: 33100201 DOI: 10.2174/1389450121666201023122355] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 09/17/2020] [Accepted: 09/22/2020] [Indexed: 11/22/2022]
Abstract
Acinetobacter baumannii is a gram-negative, aerobic, non-motile, and pleomorphic bacillus. A. baumannii is also a highly-infectious pathogen causing high mortality and morbidity rates in intensive care units. The discovery of novel agents against A. baumannii infections is urgently needed due to the emergence of drug-resistant A. baumannii strains and the limited number of efficacious antibiotics available for treatment. In addition to the production of several virulence factors, A. baumannii forms biofilms on the host cell surface as well. Formation of biofilms occurs through initial surface attachment, microcolony formation, biofilm maturation, and detachment stages, and is one of the major drug resistance mechanisms employed by A. baumannii. Several studies have previously reported the efficacy of naturally-derived and synthetic compounds as anti- biofilm and anti-virulence agents against A. baumannii. Here, inhibition of biofilm formation and virulence factors of A. baumannii using naturally-derived and synthetic compounds are reviewed.
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Affiliation(s)
| | - Fazlurrahman Khan
- Institute of Food Science, Pukyong National University, Busan 48513, South Korea
| | - Young-Mog Kim
- Department of Food Science and Technology, Pukyong National University, Busan 48513, South Korea
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43
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Thulshan Jayathilaka EHT, Liyanage TD, Rajapaksha DC, Dananjaya SHS, Nikapitiya C, Whang I, De Zoysa M. Octominin: An antibacterial and anti-biofilm peptide for controlling the multidrug resistance and pathogenic Streptococcus parauberis. FISH & SHELLFISH IMMUNOLOGY 2021; 110:23-34. [PMID: 33378697 DOI: 10.1016/j.fsi.2020.12.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 12/20/2020] [Accepted: 12/22/2020] [Indexed: 06/12/2023]
Abstract
Streptococcus parauberis is a pathogenic gram-positive bacterium that causes streptococcosis infection in fish. Since S. parauberis is becoming resistant to multiple antibiotics, the development of alternatives, such as antimicrobial peptides, has gained great attention. Octominin, derived from the defense protein of Octopus minor, showed a significant antimicrobial activity against multidrug resistance S. parauberis, with a minimum inhibitory concentration (MIC) and a minimum bactericidal concentration (MBC) of 50 and 100 μg/mL, respectively. Furthermore, time-kill kinetics, agar diffusion, and bacterial viability assays confirmed the concentration-dependent antibacterial activity of Octominin against S. parauberis. Field emission scanning electron microscopy analysis showed morphological and ultra-structural changes in S. parauberis upon Octominin treatment. Moreover, Octominin treatment demonstrated changes in membrane permeability, induced reactive oxygen species (ROS), and its binding ability to genomic DNA, suggesting its strong bactericidal activity with multiple modes of action. We confirmed the inhibition of biofilm formation and the eradication of existing biofilms in a concentration-dependent manner. Additionally, Octominin on S. parauberis at transcriptional level exhibited downregulation of membrane formation (pgsA and cds1), DNA repairing (recF), biofilm formation (pgaB and epsF) genes, while upregulation of ROS detoxification (sodA) and DNA protecting (ahpF) related genes. An in vivo study confirmed a significantly (P < 0.05) higher relative percentage survival in Octominin-treated larval zebrafish exposed to S. parauberis (93.3%) compared to the control group (20.0%). Collectively, our results confirm that Octominin could be a potential antibacterial and anti-biofilm agent against S. parauberis.
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Affiliation(s)
- E H T Thulshan Jayathilaka
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - T D Liyanage
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - D C Rajapaksha
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - S H S Dananjaya
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - Chamilani Nikapitiya
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea
| | - Ilson Whang
- National Marine Biodiversity Institute of Korea (MABIK), 75, Jangsan-ro 101beon-gil, Janghang-eup, Seochun-gun, Chungchungnam-do, 33662, Republic of Korea.
| | - Mahanama De Zoysa
- College of Veterinary Medicine, Chungnam National University, Yuseong-gu, Daejeon, 34134, Republic of Korea.
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Yokoo H, Hirano M, Misawa T, Demizu Y. Helical Antimicrobial Peptide Foldamers Containing Non-proteinogenic Amino Acids. ChemMedChem 2021; 16:1226-1233. [PMID: 33565721 DOI: 10.1002/cmdc.202000940] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Indexed: 12/18/2022]
Abstract
Antimicrobial peptides (AMPs) are potential novel therapeutic drugs against microbial infections. Most AMPs function by disrupting microbial membranes because of their amphipathic properties and ordered secondary structures. In this minireview, we describe recent efforts to develop helical AMP foldamers containing non-proteinogenic amino acids, such as α,α-disubstituted α-amino acids, β-amino acids, γ-amino acids, side-chain stapling and N-alkyl glycines.
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Affiliation(s)
- Hidetomo Yokoo
- Division of Organic Chemistry, National Institute of Health Sciences, 3-25-26, Tonomachi, Kawasaki, Kanagawa, 210-9501, Japan
| | - Motoharu Hirano
- Division of Organic Chemistry, National Institute of Health Sciences, 3-25-26, Tonomachi, Kawasaki, Kanagawa, 210-9501, Japan.,Graduate School of Medical Life Science, Yokohama City University, 1-7-29, Yokohama, Kanagawa, 230-0045, Japan
| | - Takashi Misawa
- Division of Organic Chemistry, National Institute of Health Sciences, 3-25-26, Tonomachi, Kawasaki, Kanagawa, 210-9501, Japan
| | - Yosuke Demizu
- Division of Organic Chemistry, National Institute of Health Sciences, 3-25-26, Tonomachi, Kawasaki, Kanagawa, 210-9501, Japan.,Graduate School of Medical Life Science, Yokohama City University, 1-7-29, Yokohama, Kanagawa, 230-0045, Japan
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Hirano M, Saito C, Yokoo H, Goto C, Kawano R, Misawa T, Demizu Y. Development of Antimicrobial Stapled Peptides Based on Magainin 2 Sequence. Molecules 2021; 26:444. [PMID: 33466998 PMCID: PMC7830303 DOI: 10.3390/molecules26020444] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 01/12/2021] [Accepted: 01/12/2021] [Indexed: 01/01/2023] Open
Abstract
Magainin 2 (Mag2), which was isolated from the skin of the African clawed frog, is a representative antimicrobial peptide (AMP) that exerts antimicrobial activity via microbial membrane disruption. It has been reported that the helicity and amphipathicity of Mag2 play important roles in its antimicrobial activity. We investigated and recently reported that 17 amino acid residues of Mag2 are required for its antimicrobial activity, and accordingly developed antimicrobial foldamers containing α,α-disubstituted amino acid residues. In this study, we further designed and synthesized a set of Mag2 derivatives bearing the hydrocarbon stapling side chain for helix stabilization. The preferred secondary structures, antimicrobial activities, and cell-membrane disruption activities of the synthesized peptides were evaluated. Our analyses revealed that hydrocarbon stapling strongly stabilized the helical structure of the peptides and enhanced their antimicrobial activity. Moreover, peptide 2 stapling between the first and fifth position from the N-terminus showed higher antimicrobial activity than that of Mag2 against both gram-positive and gram-negative bacteria without exerting significant hemolytic activity. To investigate the modes of action of tested peptides 2 and 8 in antimicrobial and hemolytic activity, electrophysiological measurements were performed.
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Affiliation(s)
- Motoharu Hirano
- Division of Organic Chemistry, National Institute of Health Sciences, 3-25-26, Tonomachi, Kawasaki, Kanagawa 210-9501, Japan; (M.H.); (H.Y.); (C.G.)
- Graduate School of medical Life Science, Yokohama City University, 1-7-29, Yokohama, Kanagawa 230-0045, Japan
| | - Chihiro Saito
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-6 Naka-cho, Koganei, Tokyo 184-8588, Japan; (C.S.); (R.K.)
| | - Hidetomo Yokoo
- Division of Organic Chemistry, National Institute of Health Sciences, 3-25-26, Tonomachi, Kawasaki, Kanagawa 210-9501, Japan; (M.H.); (H.Y.); (C.G.)
| | - Chihiro Goto
- Division of Organic Chemistry, National Institute of Health Sciences, 3-25-26, Tonomachi, Kawasaki, Kanagawa 210-9501, Japan; (M.H.); (H.Y.); (C.G.)
- Graduate School of medical Life Science, Yokohama City University, 1-7-29, Yokohama, Kanagawa 230-0045, Japan
| | - Ryuji Kawano
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-6 Naka-cho, Koganei, Tokyo 184-8588, Japan; (C.S.); (R.K.)
| | - Takashi Misawa
- Division of Organic Chemistry, National Institute of Health Sciences, 3-25-26, Tonomachi, Kawasaki, Kanagawa 210-9501, Japan; (M.H.); (H.Y.); (C.G.)
| | - Yosuke Demizu
- Division of Organic Chemistry, National Institute of Health Sciences, 3-25-26, Tonomachi, Kawasaki, Kanagawa 210-9501, Japan; (M.H.); (H.Y.); (C.G.)
- Graduate School of medical Life Science, Yokohama City University, 1-7-29, Yokohama, Kanagawa 230-0045, Japan
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Biofilms as Promoters of Bacterial Antibiotic Resistance and Tolerance. Antibiotics (Basel) 2020; 10:antibiotics10010003. [PMID: 33374551 PMCID: PMC7822488 DOI: 10.3390/antibiotics10010003] [Citation(s) in RCA: 167] [Impact Index Per Article: 41.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 12/15/2020] [Accepted: 12/19/2020] [Indexed: 12/12/2022] Open
Abstract
Multidrug resistant bacteria are a global threat for human and animal health. However, they are only part of the problem of antibiotic failure. Another bacterial strategy that contributes to their capacity to withstand antimicrobials is the formation of biofilms. Biofilms are associations of microorganisms embedded a self-produced extracellular matrix. They create particular environments that confer bacterial tolerance and resistance to antibiotics by different mechanisms that depend upon factors such as biofilm composition, architecture, the stage of biofilm development, and growth conditions. The biofilm structure hinders the penetration of antibiotics and may prevent the accumulation of bactericidal concentrations throughout the entire biofilm. In addition, gradients of dispersion of nutrients and oxygen within the biofilm generate different metabolic states of individual cells and favor the development of antibiotic tolerance and bacterial persistence. Furthermore, antimicrobial resistance may develop within biofilms through a variety of mechanisms. The expression of efflux pumps may be induced in various parts of the biofilm and the mutation frequency is induced, while the presence of extracellular DNA and the close contact between cells favor horizontal gene transfer. A deep understanding of the mechanisms by which biofilms cause tolerance/resistance to antibiotics helps to develop novel strategies to fight these infections.
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Antibiofilm and antivirulence efficacy of myrtenol enhances the antibiotic susceptibility of Acinetobacter baumannii. Sci Rep 2020; 10:21975. [PMID: 33319862 PMCID: PMC7738676 DOI: 10.1038/s41598-020-79128-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 11/26/2020] [Indexed: 02/07/2023] Open
Abstract
Acinetobacter baumannii (AB) is rising as a human pathogen of critical priority worldwide as it is the leading cause of chronic opportunistic infections in healthcare settings and the condition is ineradicable with antibiotic therapy. AB possesses the ability to form biofilm on abiotic as well as biotic surfaces which plays a major role in its pathogenesis and resistance in clinical settings. Hence, the demand for an alternative therapy to combat the biofilm-associated infections is increasing. The present study explored the antibiofilm potential of myrtenol, a bicyclic monoterpene present in various plants against reference and clinical strains of AB. Myrtenol (200 μg/mL) exhibited a strong antibiofilm activity without exerting any harmful effect on growth and metabolic viability of AB strains. Microscopic analyses confirmed the reduction in the biofilm thickness and surface coverage upon myrtenol treatment. Especially, myrtenol was found to be effective in disrupting the mature biofilms of tested AB strains. Furthermore, myrtenol inhibited the biofilm-associated virulence factors of AB strains such as extracellular polysaccharide, cell surface hydrophobicity, oxidant resistance, swarming and twitching motility. Transcriptional analysis unveiled the suppression of the biofilm-associated genes such as bfmR, csuA/B, bap, ompA, pgaA, pgaC, and katE by myrtenol. Notably, myrtenol improved the susceptibility of AB strains towards conventional antibiotics such as amikacin, ciprofloxacin, gentamicin and trimethoprim. Thus, the present study demonstrates the therapeutic potential of myrtenol against biofilm-associated infections of AB.
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Scorpion-Venom-Derived Antimicrobial Peptide Css54 Exerts Potent Antimicrobial Activity by Disrupting Bacterial Membrane of Zoonotic Bacteria. Antibiotics (Basel) 2020; 9:antibiotics9110831. [PMID: 33233541 PMCID: PMC7699533 DOI: 10.3390/antibiotics9110831] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 11/11/2020] [Accepted: 11/18/2020] [Indexed: 01/10/2023] Open
Abstract
Antibiotic resistance is an important issue affecting humans and livestock. Antimicrobial peptides are promising alternatives to antibiotics. In this study, the antimicrobial peptide Css54, isolated from the venom of C. suffuses, was found to exhibit antimicrobial activity against bacteria such as Listeria monocytogenes, Streptococcus suis, Campylobacter jejuni, and Salmonella typhimurium that cause zoonotic diseases. Moreover, the cytotoxicity and hemolytic activity of Css54 was lower than that of melittin isolated from bee venom. Circular dichroism assays showed that Css54 has an α-helix structure in an environment mimicking that of bacterial cell membranes. We examined the effect of Css54 on bacterial membranes using N-phenyl-1-naphthylamine, 3,3'-dipropylthiadicarbbocyanine iodides, SYTOX green, and propidium iodide. Our findings suggest that the Css54 peptide kills bacteria by disrupting the bacterial membrane. Moreover, Css54 exhibited antibiofilm activity against L. monocytogenes. Thus, Css54 may be useful as an alternative to antibiotics in humans and animal husbandry.
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Bonnel C, Legrand B, Simon M, Clavié M, Masnou A, Jumas-Bilak E, Kang YK, Licznar-Fajardo P, Maillard LT, Masurier N. Tailoring the Physicochemical Properties of Antimicrobial Peptides onto a Thiazole-Based γ-Peptide Foldamer. J Med Chem 2020; 63:9168-9180. [DOI: 10.1021/acs.jmedchem.0c00077] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Clément Bonnel
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS, UM, ENSCM, UFR des Sciences Pharmaceutiques et Biologiques, 15 Avenue Charles Flahault, 34093 Montpellier Cedex 5, France
| | - Baptiste Legrand
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS, UM, ENSCM, UFR des Sciences Pharmaceutiques et Biologiques, 15 Avenue Charles Flahault, 34093 Montpellier Cedex 5, France
| | - Matthieu Simon
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS, UM, ENSCM, UFR des Sciences Pharmaceutiques et Biologiques, 15 Avenue Charles Flahault, 34093 Montpellier Cedex 5, France
| | - Margaux Clavié
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS, UM, ENSCM, UFR des Sciences Pharmaceutiques et Biologiques, 15 Avenue Charles Flahault, 34093 Montpellier Cedex 5, France
| | - Agnès Masnou
- Laboratoire HydroSciences Montpellier, UMR 5569, CNRS, UM, IRD, Département d’Hygiène Hospitalière−CHU Montpellier, 34095 Montpellier, France
| | - Estelle Jumas-Bilak
- Laboratoire HydroSciences Montpellier, UMR 5569, CNRS, UM, IRD, Département d’Hygiène Hospitalière−CHU Montpellier, 34095 Montpellier, France
| | - Young Kee Kang
- Department of Chemistry, Chungbuk National University, Cheongju, Chungbuk 28644, Republic of Korea
| | - Patricia Licznar-Fajardo
- Laboratoire HydroSciences Montpellier, UMR 5569, CNRS, UM, IRD, Département d’Hygiène Hospitalière−CHU Montpellier, 34095 Montpellier, France
| | - Ludovic T. Maillard
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS, UM, ENSCM, UFR des Sciences Pharmaceutiques et Biologiques, 15 Avenue Charles Flahault, 34093 Montpellier Cedex 5, France
| | - Nicolas Masurier
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS, UM, ENSCM, UFR des Sciences Pharmaceutiques et Biologiques, 15 Avenue Charles Flahault, 34093 Montpellier Cedex 5, France
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Correlation between hemolytic activity, cytotoxicity and systemic in vivo toxicity of synthetic antimicrobial peptides. Sci Rep 2020; 10:13206. [PMID: 32764602 PMCID: PMC7414031 DOI: 10.1038/s41598-020-69995-9] [Citation(s) in RCA: 189] [Impact Index Per Article: 47.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 07/13/2020] [Indexed: 01/08/2023] Open
Abstract
The use of non-standard toxicity models is a hurdle in the early development of antimicrobial peptides towards clinical applications. Herein we report an extensive in vitro and in vivo toxicity study of a library of 24 peptide-based antimicrobials with narrow spectrum activity towards veterinary pathogens. The haemolytic activity of the compounds was evaluated against four different species and the relative sensitivity against the compounds was highest for canine erythrocytes, intermediate for rat and human cells and lowest for bovine cells. Selected peptides were additionally evaluated against HeLa, HaCaT and HepG2 cells which showed increased stability towards the peptides. Therapeutic indexes of 50–500 suggest significant cellular selectivity in comparison to bacterial cells. Three peptides were administered to rats in intravenous acute dose toxicity studies up to 2–8 × MIC. None of the injected compounds induced any systemic toxic effects in vivo at the concentrations employed illustrating that the correlation between the different assays is not obvious. This work sheds light on the in vitro and in vivo toxicity of this class of promising compounds and provides insights into the relationship between the different toxicity models often employed in different manners to evaluate the toxicity of novel bioactive compounds in general.
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