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Immobilized N ‐alkylated polyethylenimine avidly kills bacteria by rupturing cell membranes with no resistance developed

Immobilized N ‐alkylated polyethylenimine avidly kills bacteria by rupturing cell membranes with... Several critical mechanistic and phenomenological aspects of the microbicidal surface coatings based on immobilized hydrophobic polycations, previously developed by us, are addressed. Using Escherichia coli (Gram‐negative) and Staphylococcus aureus (Gram‐positive) bacteria, remarkable bactericidal action (up to a 109‐fold reduction in live bacteria count in the surface‐exposed solution and a 100% inactivation of the surface‐adhered bacteria) of an amino‐glass slide covalently derivatized with N‐hexyl,methyl‐polyethylenimine (PEI) is found to be due to rupturing bacterial cell membranes by the polymeric chains. The bacteria fail to develop noticeable resistance to this lethal action over the course of many successive generations. Finally, the immobilized N‐alkyl‐PEI, while deadly to bacteria, is determined to be harmless to mammalian (monkey kidney) cells. © 2005 Wiley Periodicals, Inc. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Biotechnology and Bioengineering Wiley

Immobilized N ‐alkylated polyethylenimine avidly kills bacteria by rupturing cell membranes with no resistance developed

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References (43)

Publisher
Wiley
Copyright
Copyright © 2005 Wiley Periodicals, Inc., A Wiley Company
ISSN
0006-3592
eISSN
1097-0290
DOI
10.1002/bit.20454
pmid
15803464
Publisher site
See Article on Publisher Site

Abstract

Several critical mechanistic and phenomenological aspects of the microbicidal surface coatings based on immobilized hydrophobic polycations, previously developed by us, are addressed. Using Escherichia coli (Gram‐negative) and Staphylococcus aureus (Gram‐positive) bacteria, remarkable bactericidal action (up to a 109‐fold reduction in live bacteria count in the surface‐exposed solution and a 100% inactivation of the surface‐adhered bacteria) of an amino‐glass slide covalently derivatized with N‐hexyl,methyl‐polyethylenimine (PEI) is found to be due to rupturing bacterial cell membranes by the polymeric chains. The bacteria fail to develop noticeable resistance to this lethal action over the course of many successive generations. Finally, the immobilized N‐alkyl‐PEI, while deadly to bacteria, is determined to be harmless to mammalian (monkey kidney) cells. © 2005 Wiley Periodicals, Inc.

Journal

Biotechnology and BioengineeringWiley

Published: Jun 20, 2005

Keywords: polycations; immobilization; antimicrobial; microbicidal materials; bactericidal surfaces

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