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Synthesis of an Intein-mediated Artificial Protein Hydrogel
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Bifunctional monolithic affinity hydrogels for dual-protein delivery.

Chien-Chi Lin1, Andrew T Metters

  • 1Department of Bioengineering, Clemson University, Clemson, South Carolina 29634, USA.

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Summary

This study introduces novel affinity hydrogels for controlled, independent delivery of multiple proteins, crucial for tissue regeneration. These materials maintain high water content, ensuring therapeutic stability and cell viability.

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Drug Delivery

Background:

  • Multiple-protein delivery is key for tissue regeneration.
  • Existing composite biomaterials have limitations in protein stability due to fabrication and low water content.
  • Need for advanced materials to overcome these challenges.

Purpose of the Study:

  • To develop single-step fabricated affinity hydrogels for independent, controlled delivery of multiple proteins.
  • To address limitations of current composite matrices in maintaining therapeutic stability.
  • To enhance tissue regeneration strategies through improved protein delivery.

Main Methods:

  • Incorporation of glycidyl methacrylate-iminodiacetic acid (GMIDA) ligands into poly(ethylene glycol) hydrogels.
  • Utilizing distinct binding mechanisms (electrostatic interaction and metal-ion chelation) for selective protein release.
  • Single-step fabrication of injectable monolithic hydrogels under mild physiological conditions.

Main Results:

  • Demonstrated independent control over the release of two model proteins (lysozyme and hisGFP).
  • Affinity hydrogels rapidly encapsulate multiple therapeutic agents.
  • Maintained high water permeabilities, crucial for protein and cell stability.

Conclusions:

  • Injectable monolithic affinity hydrogels offer a promising platform for controlled multi-protein delivery.
  • These hydrogels overcome limitations of composite matrices by preserving therapeutic stability and cell viability.
  • Potential to significantly advance tissue regeneration applications.