Initial Steps towards Spatiotemporal Signaling through Biomaterials Using Click-to-Release Chemistry

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Chemical Biology

Background:

• Wound healing typically results in scar tissue formation, a fibrotic response.
• Minimizing fibrosis through anti-fibrotic factors can promote tissue regeneration.
• Tunable biomaterials are needed for controlled spatiotemporal release of therapeutic agents in wound healing.

Purpose of the Study:

• To demonstrate the feasibility of using click-to-release chemistry for developing pro-regenerative biomaterials.
• To create a system for controlled release of human epidermal growth factor (hEGF) for wound healing applications.

Main Methods:

• Functionalization of a bis-N-hydroxysuccinimide-trans-cyclooctene (TCO) linker with hEGF.
• Conjugation of the hEGF-TCO complex to carrier proteins: type I collagen scaffolds and bovine serum albumin (BSA).
• Analysis of hEGF-TCO coupling and release using mass spectrometry, immunofluorescence staining, and Western blotting after exposure to dimethyl-tetrazine.

Main Results:

• Successful coupling of hEGF to the TCO linker was confirmed by mass spectrometry.
• Type I collagen scaffolds were effectively functionalized with the hEGF-TCO complex.
• Partial release of hEGF from BSA conjugates upon exposure to dimethyl-tetrazine was verified by Western blotting.

Conclusions:

• Click-to-release chemistry provides a viable strategy for developing tunable, pro-regenerative biomaterials.
• This approach enables controlled delivery of growth factors to modulate wound healing processes.
• The developed system shows potential for advancing regenerative medicine in wound care.