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Stern Bauer T, Yakobi R, Hurevich M, Yitzchaik S, Hayouka Z. Impedimetric Bacterial Detection Using Random Antimicrobial Peptide Mixtures. SENSORS (BASEL, SWITZERLAND) 2023; 23:561. [PMID: 36679359 PMCID: PMC9866871 DOI: 10.3390/s23020561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/19/2022] [Accepted: 12/28/2022] [Indexed: 06/17/2023]
Abstract
The biosensing of bacterial pathogens is of a high priority. Electrochemical biosensors are an important future tool for rapid bacteria detection. A monolayer of bacterial-binding peptides can serve as a recognition layer in such detection devices. Here, we explore the potential of random peptide mixtures (RPMs) composed of phenylalanine and lysine in random sequences and of controlled length, to form a monolayer that can be utilized for sensing. RPMs were found to assemble in a thin and diluted layer that attracts various bacteria. Faradaic electrochemical impedance spectroscopy was used with modified gold electrodes to measure the charge-transfer resistance (RCT) caused due to the binding of bacteria to RPMs. Pseudomonas aeruginosa was found to cause the most prominent increase in RCT compared to other model bacteria. We show that the combination of highly accessible antimicrobial RPMs and electrochemical analysis can be used to generate a new promising line of bacterial biosensors.
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Affiliation(s)
- Tal Stern Bauer
- Institute of Biochemistry, Food Science and Nutrition, Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Ravit Yakobi
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Mattan Hurevich
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Shlomo Yitzchaik
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Zvi Hayouka
- Institute of Biochemistry, Food Science and Nutrition, Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel
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Maron B, Rolff J, Friedman J, Hayouka Z. Antimicrobial Peptide Combination Can Hinder Resistance Evolution. Microbiol Spectr 2022; 10:e0097322. [PMID: 35862981 PMCID: PMC9430149 DOI: 10.1128/spectrum.00973-22] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 06/24/2022] [Indexed: 12/29/2022] Open
Abstract
Antibiotic-resistant microbial pathogens are becoming a major threat to human health. Therefore, there is an urgent need to develop new alternatives to conventional antibiotics. One such promising alternative is antimicrobial peptides (AMPs), which are produced by virtually all organisms and typically inhibit bacteria via membrane disruption. However, previous studies demonstrated that bacteria can rapidly develop AMP resistance. Here, we study whether combination therapy, known to be able to inhibit the evolution of resistance to conventional antibiotics, can also hinder the evolution of AMP resistance. To do so, we evolved the opportunistic pathogen Staphylococcus aureus in the presence of individual AMPs, AMP pairs, and a combinatorial antimicrobial peptide library. Treatment with some AMP pairs indeed hindered the evolution of resistance compared with individual AMPs. In particular, resistance to pairs was delayed when resistance to the individual AMPs came at a cost of impaired bacterial growth and did not confer cross-resistance to other tested AMPs. The lowest level of resistance evolved during treatment with the combinatorial antimicrobial peptide library termed random antimicrobial peptide mixture, which contains more than a million different peptides. A better understanding of how AMP combinations affect the evolution of resistance is a crucial step in order to design "resistant proof" AMP cocktails that will offer a sustainable treatment option for antibiotic-resistant pathogens. IMPORTANCE The main insights gleaned from this study are the following. (i) AMP combination treatment can delay the evolution of resistance in S. aureus. Treatment with some AMP pairs resulted in significantly lower resistance then treatment with either of the individual AMPs. Treatment with a random AMP library resulted in no detectable resistance. (ii) The rate at which resistance to combination arises correlates with the cost of resistance to individual AMPs and their cross-resistance. In particular, combinations to which the least resistance arose involved AMPs with high fitness cost of resistance and low cross-resistance. (iii) No broad-range AMP resistance evolved. Strains that evolved resistance to some AMPs typically remained sensitive to other AMPs, alleviating concerns regarding the evolution of resistance to immune system AMPs in response to AMP treatment.
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Affiliation(s)
- Bar Maron
- Institute of Biochemistry, Food Science and Nutrition, The Hebrew University of Jerusalem, Rehovot, Israel
- Department of Plant Pathology and Microbiology, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Jens Rolff
- Institute of Biology, Evolutionary Biology, Freie University, Berlin, Germany
| | - Jonathan Friedman
- Department of Plant Pathology and Microbiology, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Zvi Hayouka
- Institute of Biochemistry, Food Science and Nutrition, The Hebrew University of Jerusalem, Rehovot, Israel
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Bauer TS, Menagen B, Avnir D, Hayouka Z. Random peptide mixtures entrapped within a copper-cuprite matrix: new antimicrobial agent against methicillin-resistant Staphylococcus aureus. Sci Rep 2019; 9:11215. [PMID: 31375700 PMCID: PMC6677760 DOI: 10.1038/s41598-019-47315-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 07/10/2019] [Indexed: 12/01/2022] Open
Abstract
The emergence of global antibiotic resistance necessitates the urgent need to develop new and effective antimicrobial agents. Combination of two antimicrobial agents can potentially improve antimicrobial potency and mitigate the development of resistance. Therefore, we have utilized metal molecular doping methodology whereby antimicrobial random peptides mixture (RPMs) are entrapped in a bactericidal copper metal matrix. The copper/RPM composite exhibits greater antimicrobial activity toward methicillin-resistant Staphylococcus aureus (MRSA) than either copper or RPMs alone. Our findings indicate that this bactericidal antimicrobial biomaterial could be utilized to efficiently eradicate antibiotic-resistant pathogenic bacteria for health, agricultural and environmental applications.
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Affiliation(s)
- Tal Stern Bauer
- Institute of Biochemistry, Food Science and Nutrition, The Hebrew University of Jerusalem, Rehovot, 76100, Israel
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Barak Menagen
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - David Avnir
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Zvi Hayouka
- Institute of Biochemistry, Food Science and Nutrition, The Hebrew University of Jerusalem, Rehovot, 76100, Israel.
- The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel.
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Siriwardena TN, Capecchi A, Gan B, Jin X, He R, Wei D, Ma L, Köhler T, van Delden C, Javor S, Reymond J. Optimizing Antimicrobial Peptide Dendrimers in Chemical Space. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802837] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Thissa N. Siriwardena
- Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 3012 Bern Switzerland
| | - Alice Capecchi
- Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 3012 Bern Switzerland
| | - Bee‐Ha Gan
- Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 3012 Bern Switzerland
| | - Xian Jin
- Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 3012 Bern Switzerland
| | - Runze He
- Shanghai Space Peptides Pharmaceutical Co., Ltd. Shanghai 201210 China
| | - Dengwen Wei
- Department of General Surgery Lanzhou General Hospital of Lanzhou Military Region, PLA 333 South Binhe Road, Qilihe District Lanzhou Gansu Province 730046 China
| | - Lan Ma
- Lanzhou Ruibei Pharmaceutical R&D Co., Ltd. Lanzhou Gansu Province 730000 China
| | - Thilo Köhler
- Department of Microbiology and Molecular Medicine University of Geneva
- Service of Infectious Diseases University Hospital of Geneva Geneva Switzerland
| | - Christian van Delden
- Department of Microbiology and Molecular Medicine University of Geneva
- Service of Infectious Diseases University Hospital of Geneva Geneva Switzerland
| | - Sacha Javor
- Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 3012 Bern Switzerland
| | - Jean‐Louis Reymond
- Department of Chemistry and Biochemistry University of Bern Freiestrasse 3 3012 Bern Switzerland
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Siriwardena TN, Capecchi A, Gan BH, Jin X, He R, Wei D, Ma L, Köhler T, van Delden C, Javor S, Reymond JL. Optimizing Antimicrobial Peptide Dendrimers in Chemical Space. Angew Chem Int Ed Engl 2018; 57:8483-8487. [PMID: 29767453 DOI: 10.1002/anie.201802837] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 05/08/2018] [Indexed: 12/13/2022]
Abstract
We used nearest-neighbor searches in chemical space to improve the activity of the antimicrobial peptide dendrimer (AMPD) G3KL and identified dendrimer T7, which has an expanded activity range against Gram-negative pathogenic bacteria including Klebsiellae pneumoniae, increased serum stability, and promising activity in an in vivo infection model against a multidrug-resistant strain of Acinetobacter baumannii. Imaging, spectroscopic studies, and a structural model from molecular dynamics simulations suggest that T7 acts through membrane disruption. These experiments provide the first example of using virtual screening in the field of dendrimers and show that dendrimer size does not limit the activity of AMPDs.
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Affiliation(s)
- Thissa N Siriwardena
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland
| | - Alice Capecchi
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland
| | - Bee-Ha Gan
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland
| | - Xian Jin
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland
| | - Runze He
- Shanghai Space Peptides Pharmaceutical Co., Ltd., Shanghai, 201210, China
| | - Dengwen Wei
- Department of General Surgery, Lanzhou General Hospital of Lanzhou Military Region, PLA, 333 South Binhe Road, Qilihe District, Lanzhou, Gansu Province, 730046, China
| | - Lan Ma
- Lanzhou Ruibei Pharmaceutical R&D Co., Ltd., Lanzhou, Gansu Province, 730000, China
| | - Thilo Köhler
- Department of Microbiology and Molecular Medicine, University of Geneva.,Service of Infectious Diseases, University Hospital of Geneva, Geneva, Switzerland
| | - Christian van Delden
- Department of Microbiology and Molecular Medicine, University of Geneva.,Service of Infectious Diseases, University Hospital of Geneva, Geneva, Switzerland
| | - Sacha Javor
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland
| | - Jean-Louis Reymond
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012, Bern, Switzerland
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Stern Bauer T, Hayouka Z. Random mixtures of antimicrobial peptides inhibit bacteria associated with pasteurized bovine milk. J Pept Sci 2018; 24:e3088. [DOI: 10.1002/psc.3088] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 02/27/2018] [Accepted: 04/30/2018] [Indexed: 01/28/2023]
Affiliation(s)
- Tal Stern Bauer
- Institute of Biochemistry, Food Science and Nutrition, Robert H. Smith Faculty of Agriculture, Food and Environment; The Hebrew University of Jerusalem; PO Box 12 Rehovot 76100 Israel
| | - Zvi Hayouka
- Institute of Biochemistry, Food Science and Nutrition, Robert H. Smith Faculty of Agriculture, Food and Environment; The Hebrew University of Jerusalem; PO Box 12 Rehovot 76100 Israel
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