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Multifunctional thermoresponsive designer peptide hydrogels.

Luis M De Leon-Rodriguez1, Yacine Hemar2, Guang Mo3

  • 1School of Biological Sciences, The University of Auckland, 3A Symonds St, Thomas Building, Auckland 1010, New Zealand.

Acta Biomaterialia
|October 17, 2016
PubMed
Summary

Researchers developed novel multifunctional peptides that form stiffer, thermoresponsive hydrogels. This breakthrough overcomes limitations in peptide hydrogel functionalization for advanced biomedical applications.

Keywords:
AdhesionEnzymatic-cleavageHydrogelMechanical characterizationPeptideThermoresponsive

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Area of Science:

  • Biomaterials Science
  • Supramolecular Chemistry
  • Peptide Engineering

Background:

  • Chemical biofunctionalization of peptide hydrogels often impairs assembly, formation, and mechanical properties.
  • Existing systems face limitations in achieving enhanced mechanical strength post-functionalization.

Purpose of the Study:

  • To synthesize and characterize multifunctional peptides for improved hydrogel properties.
  • To develop a novel functionalization protocol for peptide hydrogels.
  • To explore thermoresponsive and mechanical characteristics for biomedical applications.

Main Methods:

  • Synthesis of multifunctional peptides incorporating a beta-sheet hydrogel segment and a matrix metalloproteinase 2 substrate.
  • Derivatization with RGD peptide sequence via click chemistry.
  • Characterization of hydrogel formation, mechanical properties, and thermoresponsive behavior.

Main Results:

  • The synthesized multifunctional peptides formed hydrogels with significantly enhanced stiffness compared to precursors.
  • All developed peptides exhibited reversible thermoresponsive properties.
  • Demonstrated improved mechanical properties over unfunctionalized counterparts, including lower critical solution temperature behavior in one example.

Conclusions:

  • A novel functionalization protocol yields peptide hydrogels with superior mechanical properties.
  • These multifunctional, thermoresponsive hydrogels are promising candidates for diverse biomedical applications.
  • The developed system overcomes previous limitations in biofunctionalization of peptide hydrogels.