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Jitsuhiro A, Maeda T, Ogawa A, Yamada S, Konoeda Y, Maruyama H, Endo F, Kitagawa M, Tanimoto K, Hotta A, Tsuji T. Contact-Killing Antibacterial Polystyrene Polymerized Using a Quaternized Cationic Initiator. ACS Omega 2024; 9:9803-9812. [PMID: 38434858 PMCID: PMC10905582 DOI: 10.1021/acsomega.3c10233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/24/2024] [Accepted: 01/31/2024] [Indexed: 03/05/2024]
Abstract
Contact-killing antibacterial materials are attracting attention owing to their ability for sustained antibacterial activity. However, contact-killing antibacterial polystyrene (PS) has not been extensively studied because its chemically stable structure impedes chemical modification. In this study, we developed an antibacterial PS sheet with a contact-killing surface using PS synthesized from 2,2'-azobis-[2-(1,3-dimethyl-4,5-dihydro-1H-imidazol-3-ium-2-yl)]propane triflate (ADIP) as a radical initiator with cationic moieties. The PS sheet synthesized with ADIP (ADIP-PS) exhibited antibacterial activity in contrast to PS synthesized with other azo radical initiators. Surface ζ-potential measurements revealed that only ADIP-PS had a cationic surface, which contributed to its contact-killing antibacterial activity. The ADIP-PS sheets also exhibited antibacterial activity after washing. In contrast, PS sheets containing silver, a typical leachable antibacterial agent, lost all antibacterial activity after the same washing treatment. The antibacterial ADIP-PS sheet demonstrated strong broad-spectrum activity against both Gram-positive and Gram-negative bacteria, including drug-resistant bacteria. Cytotoxicity tests using L929 cells showed that the ADIP-PS sheets were noncytotoxic. This contact-killing antibacterial PS synthesized with ADIP thus demonstrated good prospects as an easily producible antimicrobial material.
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Affiliation(s)
- Akiko Jitsuhiro
- Kirin
Central Research Institute, Kirin Holdings Company Limited, 26-1 Muraoka-Higashi 2-Chome, Fujisawa, Kanagawa 251-8555 Japan
| | - Tomoki Maeda
- Frontier
Research Center for Applied Atomic Science, Ibaraki University, 162-1 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1106, Japan
- Department
of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi,
Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Akiko Ogawa
- Kirin
Central Research Institute, Kirin Holdings Company Limited, 26-1 Muraoka-Higashi 2-Chome, Fujisawa, Kanagawa 251-8555 Japan
| | - Sayuri Yamada
- Kirin
Central Research Institute, Kirin Holdings Company Limited, 26-1 Muraoka-Higashi 2-Chome, Fujisawa, Kanagawa 251-8555 Japan
| | - Yuki Konoeda
- Kirin
Central Research Institute, Kirin Holdings Company Limited, 26-1 Muraoka-Higashi 2-Chome, Fujisawa, Kanagawa 251-8555 Japan
| | - Hiroki Maruyama
- Kirin
Central Research Institute, Kirin Holdings Company Limited, 26-1 Muraoka-Higashi 2-Chome, Fujisawa, Kanagawa 251-8555 Japan
| | - Fuyuaki Endo
- Department
of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi,
Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Midori Kitagawa
- Department
of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi,
Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Keishi Tanimoto
- Department
of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi,
Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Atsushi Hotta
- Department
of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi,
Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
| | - Toshikazu Tsuji
- Kirin
Central Research Institute, Kirin Holdings Company Limited, 26-1 Muraoka-Higashi 2-Chome, Fujisawa, Kanagawa 251-8555 Japan
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