Injectable Bi-layered Cryogel Scaffolds for Targeted Adhesion to Tissues

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Developing advanced scaffolds for biomedical applications is crucial.
• Injectable and precisely adhering materials are needed for targeted therapies.

Purpose of the Study:

• To create a simple fabrication strategy for injectable bi-layered hyaluronic acid cryogel scaffolds.
• To engineer a Janus patch with selective adhesion properties for cardiac applications.

Main Methods:

• Sequential freezing, layering, and photo-cross-linking of macromer solutions to form bi-layered cryogels.
• Fabrication of Janus patches with distinct adhesive and non-adhesive surfaces.
• Evaluation of scaffold adhesion and mechanical integrity in ex vivo cardiac models.

Main Results:

• Bi-layered cryogel scaffolds with defined interfaces were successfully fabricated without compromising porosity or mechanical integrity.
• The Janus patch demonstrated selective adhesion, adhering to cardiac tissue for over 2 weeks ex vivo while resisting adhesion to other surfaces.
• The scaffold showed directional adhesion when injected into the pericardial space of explanted hearts.

Conclusions:

• A straightforward method for producing injectable, bi-layered hyaluronic acid cryogel scaffolds was established.
• The developed Janus patch offers a promising solution for cardiac patch applications requiring targeted tissue adhesion.
• This technology has potential for various biomedical applications necessitating controlled adhesion and injectability.