Injectable bioactive akermanite/alginate composite hydrogels for in situ skin tissue engineering

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• In situ tissue engineering leverages the body's regenerative capacity.
• Recruiting endogenous stem cells or progenitor cells is key for tissue repair.
• Developing advanced biomaterials is crucial for effective regenerative therapies.

Purpose of the Study:

• To create an injectable bioactive composite hydrogel for in situ tissue engineering.
• To utilize akermanite bioceramics as cross-linking agents and bioactive ion sources.
• To evaluate the hydrogel's efficacy in promoting chronic wound healing.

Main Methods:

• Prepared an injectable akermanite/alginate composite hydrogel.
• Incorporated akermanite bioceramics for cross-linking and release of Ca, Mg, and Si ions.
• Investigated the hydrogel's effects on cell behavior in vitro and in vivo using a chronic wound model.

Main Results:

• The composite hydrogel demonstrated bioactivity, regulating cell migration, proliferation, and differentiation.
• The hydrogel significantly enhanced chronic wound healing in vivo.
• Observed increased stem cell recruitment, proliferation, blood vessel formation, and re-epithelialization.

Conclusions:

• Injectable bioactive composite hydrogels serve as effective in situ tissue engineering scaffolds.
• The combination of bioceramics and biopolymers offers a versatile strategy for multifunctional biomaterials.
• This approach shows promise for advanced wound healing and tissue regeneration applications.