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Dendritic Nanogels Directed Dual-Encapsulation Topical Delivery System of Antimicrobial Peptides Targeting Skin Infections
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Coating Technology. Key Laboratory of Organ Regeneration and Transplantation of Ministry of Education, Institute of Immunology, The First Hospital, Jilin University, Changchun, 130061, P. R. China.ORCID iD: 0000-0002-9597-9578
Biological Function Unit, RISE Research Institutes of Sweden, Methodology, Textile and Medical Devices, Borås, SE-501 15, Sweden; Department of Laboratory Medicine, Institute of Biomedicine, University of Gothenburg, P.O. Box 440, Gothenburg, SE-40530, Sweden, P.O. Box 440.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Coating Technology.ORCID iD: 0000-0001-7639-1173
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Fibre- and Polymer Technology, Coating Technology.ORCID iD: 0000-0002-8474-9478
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2023 (English)In: Macromolecular Bioscience, ISSN 1616-5187, E-ISSN 1616-5195, Vol. 23, no 4, article id 2200433Article in journal (Refereed) Published
Abstract [en]

Antimicrobial peptides (AMPs) are promising antibacterial agents in the fight against multidrug resistant pathogens. However, their application to skin infections is limited by the absence of a realizable topical delivery strategy. Herein, a hybrid hierarchical delivery system for topical delivery of AMPs is accomplished through the incorporation of AMPs into dendritic nanogels (DNGs) and their subsequent embedding into poloxamer gel. The high level of control over the crosslink density and the number of chosen functionalities makes DNGs ideal capsules with tunable loading capacity for DPK-060, a human kininogen-derived AMP. Once embedded into the poloxamer gel, DPK-060 encapsulated in DNGs displays a slower release rate compared to those entrapped directly in the gels. In vitro EpiDerm Skin Irritation Tests show good biocompatibility, while MIC and time-kill curves reveal the potency of the peptide toward Staphylococcus aureus. Anti-infection tests on ex vivo pig skin and in vivo mouse infection models demonstrate that formulations with 0.5% and 1% AMPs significantly inhibit the growth of S. aureus. Similar outcomes are observed for an in vivo mouse surgical site infection model. Importantly, when normalizing the bacteria inhibition to released/free DPK-060 at the wound site, all formulations display superior efficacy compared to DPK-060 in solution.

Place, publisher, year, edition, pages
Wiley , 2023. Vol. 23, no 4, article id 2200433
Keywords [en]
antimicrobial peptide delivery, dendritic nanogels, DPK-060, poloxamer gels
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-330058DOI: 10.1002/mabi.202200433ISI: 000919125200001PubMedID: 36639138Scopus ID: 2-s2.0-85146683018OAI: oai:DiVA.org:kth-330058DiVA, id: diva2:1775329
Note

QC 20230626

Available from: 2023-06-26 Created: 2023-06-26 Last updated: 2023-06-26Bibliographically approved

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Zhang, YuningFan, YanmiaoAndrén, Oliver C. J.San Jacinto García, JorgeQin, LiguoHutchinson, DanielLüchow, MadsMalkoch, Michael

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Zhang, YuningFan, YanmiaoAndrén, Oliver C. J.San Jacinto García, JorgeQin, LiguoHutchinson, DanielLüchow, MadsMalkoch, Michael
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