Issue 28, 2024

Microenvironment-responsive release of Mg2+ from tannic acid decorated and multilevel crosslinked hydrogels accelerates infected wound healing

Abstract

The management of chronic infected wounds poses significant challenges due to frequent bacterial infections, high concentrations of reactive oxygen species, abnormal immune regulation, and impaired angiogenesis. This study introduces a novel, microenvironment-responsive, dual dynamic, and covalently bonded hydrogel, termed OHA-P-TA/G/Mg2+. It is derived from the reaction of tannic acid (TA) with phenylboronic acids (PBA), which are grafted onto oxidized hyaluronic acid (OHA-P-TA), combined with GelMA (G) via a Schiff base and chemical bonds, along with the incorporation of Mg2+. This hydrogel exhibits pH and ROS dual-responsiveness, demonstrating effective antibacterial capacity, antioxidant ability, and the anti-inflammatory ability under distinct acidic and oxidative microenvironments. Furthermore, the release of Mg2+ from the TA–Mg2+ network (TA@Mg2+) promotes the transformation of pro-inflammatory M1 phenotype macrophages to anti-inflammatory M2 phenotype, showing a microenvironment-responsive response. Finally, in vivo results indicate that the OHA-P-TA/G/Mg2+ hydrogel enhances epithelial regeneration, collagen deposition, and neovascularization, showing great potential as an effective dressing for infected wound repair.

Graphical abstract: Microenvironment-responsive release of Mg2+ from tannic acid decorated and multilevel crosslinked hydrogels accelerates infected wound healing

Supplementary files

Article information

Article type
Paper
Submitted
09 May 2024
Accepted
08 Jun 2024
First published
08 Jun 2024

J. Mater. Chem. B, 2024,12, 6856-6873

Microenvironment-responsive release of Mg2+ from tannic acid decorated and multilevel crosslinked hydrogels accelerates infected wound healing

N. Li, Y. Cao, J. Liu, W. Zou, M. Chen, H. Cao, S. Deng, J. Liang, T. Yuan, Q. Wang, Y. Fan and X. Zhang, J. Mater. Chem. B, 2024, 12, 6856 DOI: 10.1039/D4TB01000K

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