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Bioinspired Anisotropic Chitosan Hybrid Hydrogel.

Yanjie Wang1, Sijun Liu1, Wei Yu1

  • 1Advanced Rheology Institute, Department of Polymer Science and Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Jiao Tong University, Shanghai 200240, P. R. China.

ACS Applied Bio Materials
|January 12, 2022
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Summary

Researchers developed an anisotropic chitosan hybrid hydrogel (ACHH) mimicking natural tissues. This strong, biocompatible hydrogel shows promise for biomaterials and tissue engineering.

Keywords:
anisotropic hydrogelbiocompatiblechitosanoriented nanofibersprestretching

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Polymer Chemistry

Background:

  • Natural soft tissues like cartilage, tendons, and ligaments possess complex hierarchical structures vital for function.
  • Mimicking these natural structures is key for developing advanced biomaterials.
  • Existing biomaterials often lack the required mechanical strength and anisotropic properties.

Purpose of the Study:

  • To develop an anisotropic chitosan hybrid hydrogel (ACHH) inspired by the aligned fibrous structures of natural soft tissues.
  • To evaluate the mechanical properties, biocompatibility, and potential applications of the fabricated ACHH.
  • To provide a facile fabrication method for advanced chitosan-based hydrogels.

Main Methods:

  • Fabrication of an anisotropic chitosan hybrid hydrogel (ACHH) by combining oriented chitosan nanofibers with a polyacrylamide network.
  • Mechanical testing to determine tensile strength and elastic modulus.
  • In vitro assessment of biocompatibility, including myoblast adhesion and proliferation assays.

Main Results:

  • The ACHH exhibited outstanding mechanical properties, with tensile strength up to 25.6 MPa and elastic modulus up to 218.2 MPa.
  • These mechanical properties are comparable to those of natural cartilage and ligament.
  • The ACHH demonstrated excellent biocompatibility and supported myoblast adhesion and proliferation.

Conclusions:

  • The developed ACHH successfully mimics the aligned fibrous structure of natural soft tissues.
  • The hydrogel possesses superior mechanical strength and biocompatibility, making it suitable for biomaterial applications.
  • This study presents a facile method for creating advanced anisotropic chitosan-based hydrogels for tissue engineering.