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Gao J, Wang M, Wang F, Du J. Synthesis and Mechanism Insight of a Peptide-Grafted Hyperbranched Polymer Nanosheet with Weak Positive Charges but Excellent Intrinsically Antibacterial Efficacy. Biomacromolecules 2016; 17:2080-6. [PMID: 27181113 DOI: 10.1021/acs.biomac.6b00307] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Antimicrobial resistance is an increasingly problematic issue in the world and there is a present and urgent need to develop new antimicrobial therapies without drug resistance. Antibacterial polymers are less susceptible to drug resistance but they are prone to inducing serious side effects due to high positive charge. Herein we report a peptide-grafted hyperbranched polymer which can self-assemble into unusual nanosheets with highly effective intrinsically antibacterial activity but weak positive charges (+ 6.1 mV). The hyperbranched polymer was synthesized by sequential Michael addition-based thiol-ene and free radical mediated thiol-ene reactions, and followed by ring-opening polymerization of N-carboxyanhydrides (NCAs). The nanosheet structure was confirmed by transmission electron microscopy (TEM) and atomic force microscopy (AFM) studies. Furthermore, a novel "wrapping and penetrating" antibacterial mechanism of the nanosheets was revealed by TEM and it is the key to significantly decrease the positive charges but have a very low minimum inhibitory concentration (MIC) of 16 μg mL(-1) against typical Gram-positive and Gram-negative bacteria. Overall, our synthetic strategy demonstrates a new insight for synthesizing antibacterial nanomaterials with weak positive charges. Moreover, the unique antibacterial mechanism of our nanosheets may be extended for designing next-generation antibacterial agents without drug resistance.
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Affiliation(s)
- Jingyi Gao
- Shanghai Tenth People's Hospital, Tongji University School of Medicine , 301 Middle Yanchang Road, Shanghai 200072, China.,Department of Polymeric Materials, School of Materials Science and Engineering, Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University , 4800 Caoan Road, Shanghai 201804, China
| | - Mingzhi Wang
- Department of Polymeric Materials, School of Materials Science and Engineering, Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University , 4800 Caoan Road, Shanghai 201804, China
| | - Fangyingkai Wang
- Department of Polymeric Materials, School of Materials Science and Engineering, Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University , 4800 Caoan Road, Shanghai 201804, China
| | - Jianzhong Du
- Shanghai Tenth People's Hospital, Tongji University School of Medicine , 301 Middle Yanchang Road, Shanghai 200072, China.,Department of Polymeric Materials, School of Materials Science and Engineering, Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University , 4800 Caoan Road, Shanghai 201804, China
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Impact of self-tongue brushing on taste perception in Thai older adults: A pilot study. Geriatr Nurs 2016; 37:128-36. [DOI: 10.1016/j.gerinurse.2015.11.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 11/05/2015] [Accepted: 11/23/2015] [Indexed: 12/13/2022]
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Salehi E, Pousti I, Gilanpoor H, Adibmoradi M. The Morphological Observations of Some Lingual Papillae in Camelus Dromedaries Embryoes. ACTA ACUST UNITED AC 2010. [DOI: 10.3923/javaa.2010.514.518] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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