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Enzymatically triggered peptide hydrogels for 3D cell encapsulation and culture.

Laura Szkolar1, Jean-Baptiste Guilbaud, Aline F Miller

  • 1School of Materials, The University of Manchester, Manchester, M13 9PL, UK; Manchester Institute of Biotechnology, The University of Manchester, Manchester, M13 9PL, UK.

Journal of Peptide Science : an Official Publication of the European Peptide Society
|June 13, 2014
PubMed
Summary

Enzymatically triggered peptide hydrogels offer a novel method for 3D cell encapsulation and culture. This study demonstrates their biocompatibility and ability to support fibroblast proliferation, minimizing enzyme-induced cell damage.

Keywords:
cell culturecell encapsulationenzymehydrogelsmechanical propertiespeptide

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Biochemistry

Background:

  • Enzymatically triggered peptide hydrogels are emerging as advanced biomaterials.
  • Previous work focused on the gelation of FEFK peptides using thermolysin.
  • Investigating these hydrogels for cell encapsulation and culture is crucial for regenerative medicine.

Purpose of the Study:

  • To explore the use of enzymatically triggered peptide hydrogels for cell encapsulation and 3D culture.
  • To optimize hydrogel properties using phosphate buffer solutions.
  • To develop a facile protocol for cell encapsulation and assess cell viability and proliferation within the hydrogel matrix.

Main Methods:

  • Preparation and characterization of enzymatically triggered hydrogels using FEFK peptides and thermolysin.
  • Investigation of hydrogel properties in phosphate buffer solution versus HPLC grade water.
  • Development of a cell encapsulation protocol using human dermal fibroblasts.
  • Comparative analysis of cell behavior in triggered hydrogels versus control hydrogels.

Main Results:

  • Phosphate buffer solutions yielded hydrogels with high shear moduli (>1 MPa).
  • Gelation kinetics correlated with octapeptide synthesis via reverse hydrolysis.
  • The developed protocol minimized detrimental effects of thermolysin on encapsulated cells.
  • Encapsulated human dermal fibroblasts exhibited proliferation and adopted a typical fibroblast morphology after 5 days.

Conclusions:

  • Enzymatically triggered peptide hydrogels can be effectively produced in phosphate buffer solutions with tunable mechanical properties.
  • A facile protocol allows for successful 3D encapsulation and culture of cells, supporting fibroblast proliferation.
  • These hydrogels represent a promising platform for cell-based therapies and tissue engineering applications.