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Yamashita W, Ojima S, Tamura A, Azam AH, Kondo K, Yuancheng Z, Cui L, Shintani M, Suzuki M, Takahashi Y, Watashi K, Tsuneda S, Kiga K. Harnessing a T1 Phage-Derived Spanin for Developing Phage-Based Antimicrobial Development. BIODESIGN RESEARCH 2024; 6:0028. [PMID: 38516182 PMCID: PMC10954549 DOI: 10.34133/bdr.0028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 12/27/2023] [Indexed: 03/23/2024] Open
Abstract
The global increase in the prevalence of drug-resistant bacteria has necessitated the development of alternative treatments that do not rely on conventional antimicrobial agents. Using bacteriophage-derived lytic enzymes in antibacterial therapy shows promise; however, a thorough comparison and evaluation of their bactericidal efficacy are lacking. This study aimed to compare and investigate the bactericidal activity and spectrum of such lytic enzymes, with the goal of harnessing them for antibacterial therapy. First, we examined the bactericidal activity of spanins, endolysins, and holins derived from 2 Escherichia coli model phages, T1 and T7. Among these, T1-spanin exhibited the highest bactericidal activity against E. coli. Subsequently, we expressed T1-spanin within bacterial cells and assessed its bactericidal activity. T1-spanin showed potent bactericidal activity against all clinical isolates tested, including bacterial strains of 111 E. coli, 2 Acinetobacter spp., 3 Klebsiella spp., and 3 Pseudomonas aeruginosa. In contrast, T1 phage-derived endolysin showed bactericidal activity against E. coli and P. aeruginosa, yet its efficacy against other bacteria was inferior to that of T1-spanin. Finally, we developed a phage-based technology to introduce the T1-spanin gene into target bacteria. The synthesized non-proliferative phage exhibited strong antibacterial activity against the targeted bacteria. The potent bactericidal activity exhibited by spanins, combined with the novel phage synthetic technology, holds promise for the development of innovative antimicrobial agents.
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Affiliation(s)
- Wakana Yamashita
- Research Center for Drug and Vaccine Development,
National Institute of Infectious Diseases, Tokyo 162-8640, Japan
- Department of Life Science and Medical Bioscience,
Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan
| | - Shinjiro Ojima
- Research Center for Drug and Vaccine Development,
National Institute of Infectious Diseases, Tokyo 162-8640, Japan
| | - Azumi Tamura
- Research Center for Drug and Vaccine Development,
National Institute of Infectious Diseases, Tokyo 162-8640, Japan
- Division of Infectious Diseases, Advanced Clinical Research Center, The Institute of Medical Science,
The University of Tokyo, Tokyo 108-8639, Japan
| | - Aa Haeruman Azam
- Research Center for Drug and Vaccine Development,
National Institute of Infectious Diseases, Tokyo 162-8640, Japan
| | - Kohei Kondo
- Research Center for Drug and Vaccine Development,
National Institute of Infectious Diseases, Tokyo 162-8640, Japan
- Antimicrobial Resistance Research Center,
National Institute of Infectious Diseases, Tokyo, Japan
| | - Zhang Yuancheng
- Division of Bacteriology, Department of Infection and Immunity, School of Medicine,
Jichi Medical University, Shimotsuke-shi, Tochigi 329-0498, Japan
| | - Longzhu Cui
- Division of Bacteriology, Department of Infection and Immunity, School of Medicine,
Jichi Medical University, Shimotsuke-shi, Tochigi 329-0498, Japan
| | - Masaki Shintani
- Department of Engineering,
Graduate School of Integrated Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu, Shizuoka, 432-8561, Japan
| | - Masato Suzuki
- Antimicrobial Resistance Research Center,
National Institute of Infectious Diseases, Tokyo, Japan
| | - Yoshimasa Takahashi
- Research Center for Drug and Vaccine Development,
National Institute of Infectious Diseases, Tokyo 162-8640, Japan
- Department of Life Science and Medical Bioscience,
Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan
| | - Koichi Watashi
- Research Center for Drug and Vaccine Development,
National Institute of Infectious Diseases, Tokyo 162-8640, Japan
| | - Satoshi Tsuneda
- Department of Life Science and Medical Bioscience,
Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan
- Phage Therapy Institute,
Comprehensive Research Organization, Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan
| | - Kotaro Kiga
- Research Center for Drug and Vaccine Development,
National Institute of Infectious Diseases, Tokyo 162-8640, Japan
- Division of Bacteriology, Department of Infection and Immunity, School of Medicine,
Jichi Medical University, Shimotsuke-shi, Tochigi 329-0498, Japan
- Phage Therapy Institute,
Comprehensive Research Organization, Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan
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Sakaguchi T, Nakano T, Kimura Y, Nogami S, Kubo I, Morita Y. Development of a genetic transfer system in selenate-respiring bacterium Citrobacter sp. strain JSA which was isolated from natural freshwater sediment. J Biosci Bioeng 2011; 111:443-7. [PMID: 21215694 DOI: 10.1016/j.jbiosc.2010.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2010] [Revised: 10/25/2010] [Accepted: 12/01/2010] [Indexed: 11/16/2022]
Abstract
Conjugative mating between the selenate-reducing bacterium Citrobacter sp. strain JSA and Escherichia coli S17-1 harboring the broad-host-range plasmid pKT230 or pKT240 (IncQ) allowed genetic transfer to strain JSA at a maximum frequency of 2.5×10(-5) (pKT230) and 5.1×10(-6) (pKT240) per recipient JSA cell. Kanamycin-resistant (selection marker of pKT230 and pKT240) transconjugants were routinely obtained with this method, and we confirmed that both vectors were also successfully transferred and replicated in strain JSA without alteration of the replicon. Furthermore, an electroporation method has also allowed transformation of JSA at a frequency of 10(-7) to 10(-6) transformants per μg vector DNA (per recipient cell), and PCR and hybridization analyses revealed that pKT230 and pKT240 are stably maintained in transformed JSA cells. These results indicated that both InQ plasmids can be used as vectors for gene transfer to selenate-reducing strain JSA. This is the first study to demonstrate an effective method for genetic transfer in a selenate-reducing Citrobacter bacterium and will aid in the elucidation of the selenium oxyanion reduction mechanism in this genus of environmental selenate-respiring isolates.
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Affiliation(s)
- Toshifumi Sakaguchi
- Department of Environmental Sciences, Prefectural University of Hiroshima, Hiroshima 727-0023, Japan.
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