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Designed peptide amphiphiles as scaffolds for tissue engineering.

Weizhen Sun1, David Alexander Gregory2, Xiubo Zhao1

  • 1School of Pharmacy, Changzhou University, Changzhou 213164, China; Department of Chemical and Biological Engineering, University of Sheffield, Sheffield S1 3JD, UK.

Advances in Colloid and Interface Science
|March 10, 2023
PubMed
Summary

Peptide amphiphiles (PAs) are versatile biomaterials that self-assemble into nanostructures for tissue engineering. This review covers PA design, fabrication, and applications in bone, cartilage, and neural regeneration.

Keywords:
BiomaterialsPeptide amphiphilesScaffoldsTissue engineering

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Tissue Engineering

Background:

  • Peptide amphiphiles (PAs) are peptide-based molecules with a peptide head group and a hydrophobic tail.
  • PAs self-assemble into various nanostructures like micelles, vesicles, and nanofibers.
  • Their biocompatibility, biodegradability, and resemblance to the extracellular matrix (ECM) make them suitable for tissue engineering.

Purpose of the Study:

  • To review the design principles of peptide amphiphiles (PAs).
  • To discuss the self-assembly mechanisms and 3D bio-fabrication strategies of PA hydrogels.
  • To highlight recent advances in PA-based scaffolds for tissue engineering applications.

Main Methods:

  • Categorization of PAs into amphiphilic peptides, lipidated peptide amphiphiles, and supramolecular peptide amphiphile conjugates.
  • Discussion of design rules governing PA self-assembly.
  • Review of 3D bio-fabrication techniques for PA hydrogels.

Main Results:

  • PAs can be designed with diverse amino acid sequences for tailored self-assembly.
  • PA hydrogels can be fabricated using various 3D bio-fabrication strategies.
  • PA-based scaffolds show promise in promoting bone, cartilage, and neural tissue regeneration in vitro and in vivo.

Conclusions:

  • Peptide amphiphiles offer a promising platform for developing advanced tissue engineering scaffolds.
  • Further research into PA design and fabrication can overcome current challenges and expand their therapeutic potential.
  • PA-based materials hold significant promise for regenerative medicine applications.