Mechanics Mediated Semi-Convertible Hydrogel Enabled Sustained Drug Release

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Wound Healing Research

Background:

• Dynamic mechanical forces impede wound healing and worsen inflammation and scarring.
• Developing effective wound treatments for dynamic environments remains a significant challenge.

Purpose of the Study:

• To develop a mechanics-mediated semi-convertible hydrogel (M_echSCH) for enhanced dynamic wound healing.
• To investigate the synergistic interaction between supramolecular networks and polymer networks for improved drug delivery.

Main Methods:

• Fabrication of M_echSCH utilizing synergistic interactions between supramolecular non-covalent networks and polyvinyl alcohol/Gelatin polymer networks.
• Characterization of the hydrogel's gel-sol transition under shear stress (≈9.04 Pa).
• Evaluation of sustained drug release and therapeutic effects in a mice dorsal full-thickness dermal wound model using platelet-derived growth factor (PDGF).

Main Results:

• M_echSCH demonstrated a partial gel-sol transition under physiological shear stress, enabling responsive drug release.
• Sustained release of PDGF from M_echSCH was observed, surpassing non-sensitive hydrogels.
• Significant reduction in inflammation and accelerated vascular regeneration were noted in the wound model.

Conclusions:

• The M_echSCH effectively manages dynamic wound environments by providing sustained drug release.
• This hydrogel shows promise for clinical applications in chronic wound management.
• The mechanics-mediated approach offers a novel strategy for promoting tissue repair under mechanical stress.