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Photocrosslinkable and elastomeric hydrogels for bone regeneration.

Teena Thakur1, Janet R Xavier1, Lauren Cross1

  • 1Department of Biomedical Engineering, Texas A&M University, College Station, Texas, 77843.

Journal of Biomedical Materials Research. Part A
|December 10, 2015
PubMed
Summary

This study shows that nanohydroxyapatite (nHAp) and gelatin methacryloyl (GelMA) nanocomposite hydrogels enhance mechanical properties and cell growth, offering potential for bone regeneration therapies.

Keywords:
hydrogelshydroxyapatite nanoparticlesmechanical propertiesnanocompositetissue engineering

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Nanocomposite biomaterials offer unique properties for cell and tissue engineering.
  • Photocrosslinkable and elastomeric hydrogels are promising for advanced biomedical applications.

Purpose of the Study:

  • To investigate the mechanical, rheological, and degradation properties of nHAp/GelMA nanocomposite hydrogels.
  • To assess the cytocompatibility and bioactivity of these novel biomaterials.
  • To explore their potential for bone regeneration.

Main Methods:

  • Fabrication of photocrosslinkable and elastomeric nanocomposite hydrogels using nanohydroxyapatite (nHAp) and gelatin methacryloyl (GelMA).
  • Characterization of mechanical stiffness, rheological behavior, and degradation rates.
  • In vitro cell culture studies to evaluate cell adhesion, proliferation, and alkaline phosphatase (ALP) activity.
  • Assessment of cell alignment under cyclic strain.

Main Results:

  • nHAp addition significantly increased mechanical stiffness and physiological stability of the hydrogels.
  • Enhanced cell adhesion and proliferation were observed on the nanocomposite surfaces.
  • Cyclic stretching induced a stronger cell alignment response in the direction of strain.
  • In vitro studies demonstrated enhanced bioactivity, indicated by increased ALP activity.

Conclusions:

  • Elastomeric and photocrosslinkable nHAp/GelMA nanocomposite hydrogels exhibit promising properties for bone regeneration.
  • These materials support cell growth, enhance bioactivity, and can be utilized for minimally invasive therapeutic approaches.
  • The enhanced mechanical and biological characteristics make them suitable candidates for advanced tissue engineering scaffolds.