Directional Pressure Pump Hydrogel Transmission Platform Provides Bionic Contractile Force and Remodels the Healing...

Area of Science:

• Biomaterials science
• Regenerative medicine
• Wound healing research

Background:

• Diabetic wounds exhibit biofilms, oxidative stress, and mechanical stress, impairing healing.
• Reduced skin contractility prolongs inflammation and delays wound closure.
• Current treatments struggle to address the complex microenvironment of chronic diabetic wounds.

Purpose of the Study:

• To develop a directional pressure-pump hydrogel delivery platform for treating diabetic wounds.
• To investigate the platform's ability to disrupt biofilms and deliver therapeutic agents.
• To assess the hydrogel's capacity to regulate myofibroblast activation and promote skin closure.

Main Methods:

• Design and fabrication of a directional pressure-pump hydrogel.
• Incorporation of antibacterial agents and nanozymes into the hydrogel.
• Evaluation of hydrogel’s differential pressure behavior and temperature-sensitive self-shrinkage.
• In vivo animal studies to assess wound closure, vascularization, and collagen remodeling.

Main Results:

• The hydrogel platform successfully delivered antibacterial agents and nanozymes to the wound site.
• Biofilm disruption and bacterial eradication were achieved, establishing an infection defense barrier.
• The hydrogel's self-shrinkage regulated myofibroblast activation, promoting orderly skin closure.
• Animal experiments showed accelerated epidermal wound closure and guided remodeling of vascular networks and collagen.

Conclusions:

• The directional pressure-pump hydrogel platform offers a biomimetic strategy for pathological wound healing.
• This approach effectively addresses imbalanced epidermal edge contraction in diabetic wounds.
• The technology shows promise for reprogramming the wound healing microenvironment and improving outcomes.