Issue 37, 2024

Chemo-photothermal therapy of bacterial infections using metal–organic framework-integrated polymeric network coatings

Abstract

Surface modification of biomedical materials and devices using versatile nanocomposite coatings holds great promise for improving functionalities to defend against life-threatening bacterial infections. In this study, a one-step surface modification strategy was developed to deposit gold nanorods (AuNRs)- and curcumin (CUR)-encapsulated zeolitic imidazolate framework-8 (ZIF-8) nanoparticles (AuNRs-ZIF-CUR NPs or AZC) onto phytic acid (PA)-ε-polylysine (Ply) network coatings. In the solution mixture of PA, Ply and AZC, PA interacted with Ply via electrostatic interactions, and can also bind to AZC via metal chelation. The as-formed AZC–PA–Ply aggregates could be deposited onto various substrates via surface adhesion of PA and gravitational effects. The physicochemical and antibacterial properties of the AZC–PA–Ply network coatings on polydimethylsiloxane (PDMS) substrates were evaluated. The sustained release of zinc ions and CUR, as well as the contact-killing ability of Ply, endowed the AZC–PA–Ply network coatings with good antibacterial chemotherapeutic effects. In addition, the embedded AuNRs in the AZC–PA–Ply network coatings exhibited excellent photothermal conversion efficiency for the ablation of bacteria. Upon near-infrared (NIR) laser irradiation, the AZC–PA–Ply-coated PDMS surfaces exhibited strong antibacterial effects by disrupting the membrane integrity and cellular functions of the adhered bacteria. Thus, the AZC-PA-Ply network coatings displayed combined antibacterial chemotherapeutic and photothermal therapeutic effects. Furthermore, the AZC–PA–Ply-coated PDMS substrates exhibited effective bacterial infection prevention and good biocompatibility in an in vivo implant model. Hence, the versatile AZC–PA–Ply network coatings are potentially useful as a multi-modal antibacterial platform to eliminate infectious bacterial pathogens in biomedical applications.

Graphical abstract: Chemo-photothermal therapy of bacterial infections using metal–organic framework-integrated polymeric network coatings

Supplementary files

Article information

Article type
Paper
Submitted
04 Feb 2024
Accepted
07 Aug 2024
First published
07 Aug 2024

J. Mater. Chem. B, 2024,12, 9238-9248

Chemo-photothermal therapy of bacterial infections using metal–organic framework-integrated polymeric network coatings

L. Yu, H. Wu, G. Sathishkumar, X. He, R. Ran, K. Zhang, X. Rao, E. Kang and L. Xu, J. Mater. Chem. B, 2024, 12, 9238 DOI: 10.1039/D4TB00237G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements