Hybrid Nanoparticles and Composite Hydrogel Systems for Delivery of Peptide Antibiotics

authored by

Dmitrii Iudin, Marina Vasilieva, Elena Knyazeva, Viktor Korzhikov-Vlakh, Elena Demyanova, Antonina Lavrentieva, Yury Skorik, Evgenia Korzhikova-Vlakh

Abstract

The growing number of drug-resistant pathogenic bacteria poses a global threat to human health. For this reason, the search for ways to enhance the antibacterial activity of existing antibiotics is now an urgent medical task. The aim of this study was to develop novel delivery systems for polymyxins to improve their antimicrobial properties against various infections. For this, hybrid core–shell nanoparticles, consisting of silver core and a poly(glutamic acid) shell capable of poly-myxin binding, were developed and carefully investigated. Characterization of the hybrid nanopar-ticles revealed a hydrodynamic diameter of approximately 100 nm and a negative electrokinetic potential. The nanoparticles demonstrated a lack of cytotoxicity, a low uptake by macrophages, and their own antimicrobial activity. Drug loading and loading efficacy were determined for both pol-ymyxin B and E, and the maximal loaded value with an appropriate size of the delivery systems was 450 µg/mg of nanoparticles. Composite materials based on agarose hydrogel were prepared, containing both the loaded hybrid systems and free antibiotics. The features of polymyxin release from the hybrid nanoparticles and the composite materials were studied, and the mechanisms of release were analyzed using different theoretical models. The antibacterial activity against Pseudo-monas aeruginosa was evaluated for both the polymyxin hybrid and the composite delivery systems. All tested samples inhibited bacterial growth. The minimal inhibitory concentrations of the poly-myxin B hybrid delivery system demonstrated a synergistic effect when compared with either the antibiotic or the silver nanoparticles alone.

Organisation(s)

Institute of Technical Chemistry

External Organisation(s)

Saint Petersburg State University
Russian Academy of Sciences (RAS)
State Research Institute of Highly Pure Biopreparations

Type

Article

Journal

International Journal of Molecular Sciences

Volume

23

ISSN

1661-6596

Publication date

02.03.2022

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Catalysis, Molecular Biology, Spectroscopy, Computer Science Applications, Physical and Theoretical Chemistry, Organic Chemistry, Inorganic Chemistry

Sustainable Development Goals

SDG 3 - Good Health and Well-being

Electronic version(s)

https://doi.org/10.3390/ijms23052771 (Access: Open)