Alkylated EDTA potentiates antibacterial photodynamic activity of protoporphyrin.
Journal
Journal of nanobiotechnology
ISSN: 1477-3155
Titre abrégé: J Nanobiotechnology
Pays: England
ID NLM: 101152208
Informations de publication
Date de publication:
08 Apr 2024
08 Apr 2024
Historique:
received:
08
12
2023
accepted:
20
02
2024
medline:
9
4
2024
pubmed:
9
4
2024
entrez:
8
4
2024
Statut:
epublish
Résumé
Antibiotic resistance has garnered significant attention due to the scarcity of new antibiotics in development. Protoporphyrin IX (PpIX)-mediated photodynamic therapy shows promise as a novel antibacterial strategy, serving as an alternative to antibiotics. However, the poor solubility of PpIX and its tendency to aggregate greatly hinder its photodynamic efficacy. In this study, we demonstrate that alkylated EDTA derivatives (aEDTA), particularly C14-EDTA, can enhance the solubility of PpIX by facilitating its dispersion in aqueous solutions. The combination of C14-EDTA and PpIX exhibits potent antibacterial activity against Staphylococcus aureus (S. aureus) when exposed to LED light irradiation. Furthermore, this combination effectively eradicates S. aureus biofilms, which are known to be strongly resistant to antibiotics, and demonstrates high therapeutic efficacy in an animal model of infected ulcers. Mechanistic studies reveal that C14-EDTA can disrupt PpIX crystallization, increase bacterial membrane permeability and sequester divalent cations, thereby improving the accumulation of PpIX in bacteria. This, in turn, enhances reactive oxygen species (ROS) production and the antibacterial photodynamic activity. Overall, this effective strategy holds great promise in combating antibiotic-resistant strains.
Identifiants
pubmed: 38589895
doi: 10.1186/s12951-024-02353-3
pii: 10.1186/s12951-024-02353-3
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
161Subventions
Organisme : National Key Research and Development Program of China
ID : 2021YFA1201200
Organisme : National Natural Science Foundation of China
ID : 51833008
Organisme : Key Research and Development Program of Zhejiang Province
ID : 2020C01123
Organisme : Fundamental Research Funds for the Central Universities
ID : 226-2023-00022
Organisme : Basic Public Welfare Research Program of Zhejiang Province
ID : LGC21B040001
Organisme : Natural Sciences and Engineering Research Council of Canada
ID : ALLRP 570723 - 21
Informations de copyright
© 2024. The Author(s).
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