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Polymer Texture Influences Cell Responses in Osteogenic Microparticles.

Catherine E Miles1, Stephanie L Fung2, N Sanjeeva Murthy1

  • 1Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, Piscataway, NJ 08854 USA.

Cellular and Molecular Bioengineering
|November 29, 2022
PubMed
Summary

This study investigated tyrosol-derived polymers for tissue engineering. Smaller crystallites in polymers enhanced cell adhesion and osteoblast differentiation, suggesting topographical roughness influences cellular interactions.

Keywords:
Bone-morphogenetic protein-2Cell–material interactionsCrystallite sizeHydration potentialTissue regeneration

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Polymer Chemistry

Background:

  • Medical devices and tissue engineering rely on polymer biocompatibility.
  • Understanding polymer-cell interactions is crucial for predicting in vitro performance.

Purpose of the Study:

  • To investigate structure-property relationships of novel tyrosol-derived poly(ester-arylate) polymers.
  • To evaluate cell adhesion, proliferation, and osteogenic differentiation potential.

Main Methods:

  • Microparticles of four tyrosol-derived polymers and PLGA were prepared.
  • Cell adhesion, proliferation, and alkaline phosphatase (ALP) activity were assessed.
  • Bone morphogenetic protein-2 (BMP-2) adsorption and release were quantified.

Main Results:

  • All polymers supported cell adhesion and proliferation.
  • Polymers with smaller crystallites showed enhanced cell adhesion and ALP activity.
  • High BMP-2 loading and burst release were observed across all formulations.

Conclusions:

  • Smaller polymer crystallites correlate with enhanced cell adhesion and osteoblast differentiation.
  • Crystallite size may act as a topographical cue for cellular response.
  • A link between polymer crystallite size and hydration potential was identified.