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Penetration and Accumulation of Dendrons with Different Peripheral Composition in Pseudomonas aeruginosa Biofilms
Univ Groningen, Dept Biomed Engn, POB 196, NL-9700 AD Groningen, Netherlands.;Univ Med Ctr Groningen, POB 196, NL-9700 AD Groningen, Netherlands..
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Coating Technology.ORCID iD: 0000-0002-8474-9478
Univ Groningen, Dept Biomed Engn, POB 196, NL-9700 AD Groningen, Netherlands.;Univ Med Ctr Groningen, POB 196, NL-9700 AD Groningen, Netherlands..
Univ Groningen, Dept Biomed Engn, POB 196, NL-9700 AD Groningen, Netherlands.;Univ Med Ctr Groningen, POB 196, NL-9700 AD Groningen, Netherlands..
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2019 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 19, no 7, p. 4327-4333Article in journal (Refereed) Published
Abstract [en]

Multidrug resistant bacterial infections threaten to become the number one cause of death by the year 2050. Development of antimicrobial dendritic polymers is considered promising as an alternative infection control strategy. For antimicrobial dendritic polymers to effectively kill bacteria residing in infectious biofilms, they have to penetrate and accumulate deep into biofilms. Biofilms are often recalcitrant to antimicrobial penetration and accumulation. Therefore, this work aims to determine the role of compact dendrons with different peripheral composition in their penetration into Pseudomonas aeruginosa biofilms. Red fluorescently labeled dendrons with pH-responsive NH3+ peripheral groups initially penetrated faster from a buffer suspension at pH 7.0 into the acidic environment of P. aeruginosa biofilms than dendrons with OH or COO- groups at their periphery. In addition, dendrons with NH3+ peripheral groups accumulated near the top of the biofilm due to electrostatic double-layer attraction with negatively charged biofilm components. However, accumulation of dendrons with OH and COO- peripheral groups was more evenly distributed across the depth of the biofilms than NH3+ composed dendrons and exceeded accumulation of NH3+ composed dendrons after 10 min of exposure. Unlike dendrons with NH3+ groups at their periphery, dendrons with OH or COO- peripheral groups, lacking strong electrostatic double-layer attraction with biofilm components, were largely washed-out during exposure to PBS without dendrons. Thus, penetration and accumulation of dendrons into biofilms is controlled by their peripheral composition through electrostatic double-layer interactions, which is an important finding for the further development of new antimicrobial or antimicrobial-carrying dendritic polymers.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2019. Vol. 19, no 7, p. 4327-4333
Keywords [en]
Nanomedicine, nanocarriers, nanotechnology, dendrimers, dendritic polymers
National Category
Polymer Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-255568DOI: 10.1021/acs.nanolett.9b00838ISI: 000475533900015PubMedID: 31142116Scopus ID: 2-s2.0-85067935225OAI: oai:DiVA.org:kth-255568DiVA, id: diva2:1340138
Note

QC 20190802

Available from: 2019-08-02 Created: 2019-08-02 Last updated: 2019-10-04Bibliographically approved

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Andrén, Oliver C. J.Malkoch, Michael

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Andrén, Oliver C. J.Malkoch, MichaelSharma, Prashant K.
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