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Rational design of poly(peptide-ester) block copolymers for enzyme-specific surface resorption.

Stephanie L Fung¹, Jarrod P Cohen², E Thomas Pashuck^2,3

¹Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA. jfreemn@soe.rutgers.edu.

Journal of Materials Chemistry. B

|June 26, 2023

Summary

Researchers designed a new peptide-polyester biomaterial that degrades in a specific, enzyme-controlled way. This protease-mediated resorption offers a novel approach for tissue regeneration and improved biomaterial integration.

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Area of Science:

Biomaterials Science
Polymer Chemistry
Tissue Engineering

Background:

Tissue resorption and remodeling are crucial for healing and regeneration.
Current biomaterials often resorb passively via hydrolysis, underutilizing enzymatic degradation pathways.
Proteases, like those used by macrophages and osteoclasts, are key enzymes in matrix degradation.

Purpose of the Study:

To design and synthesize a tyrosol-derived peptide-polyester block copolymer for protease-mediated resorption.
To tune biomaterial resorption through polymer backbone chemistry and peptide sequence incorporation.
To achieve protease-specific degradation of biomaterials for enhanced tissue integration.

Main Methods:

Synthesis of tyrosol-derived peptide-polyester block copolymers.
Quartz crystal microbalance to quantify polymer surface resorption.
Exposure of polymers to various enzymes to assess degradation specificity.

Main Results:

Aqueous solubility and thermal properties significantly influenced enzyme-mediated polymer resorption.
Peptide incorporation (2 mol%) enhanced polymer resorption in a sequence- and protease-specific manner.
The developed block copolymers showed protease-specific sensitivity without major changes in thermal/physical properties.

Conclusions:

This study presents the first peptide-incorporated linear thermoplastic with protease-specific resorption.
The modular system allows engineering specificity in polyester resorption under physiological conditions.
This approach provides a framework for improving vascularization and integration of tissue engineering biomaterials.