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Polymers02:34

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Related Experiment Video

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Shape Memory Polymers for Active Cell Culture
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Shape Memory Polymers Containing Higher Acrylate Content Display Increased Endothelial Cell Attachment.

Tina Govindarajan1, Robin Shandas1

  • 1Department of Bioengineering, University of Colorado at Denver|Anschutz Medical Campus, Aurora, CO 80045, USA.

Polymers
|May 1, 2018
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Summary
This summary is machine-generated.

Shape Memory Polymers (SMPs) with higher tert-Butyl acrylate (tBA) content show improved endothelial cell attachment. These advanced SMP surfaces may enhance blood-contacting biomedical devices.

Keywords:
acrylatecardiovascularendothelial cellsshape memory polymerstentssurface properties

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Biomedical Engineering

Background:

  • Shape Memory Polymers (SMPs) are stimuli-responsive materials with potential in biomedical devices.
  • Focusing on SMP surface properties, rather than bulk, may improve blood-contacting applications like cardiovascular stents.
  • Rapid endothelialization on stent surfaces is crucial for success.

Purpose of the Study:

  • To evaluate endothelial cell attachment on various SMP formulations.
  • To investigate the relationship between SMP surface characteristics and endothelial cell behavior.
  • To identify promising SMPs for future blood-contacting medical devices.

Main Methods:

  • Synthesized nine SMP formulations with varying tert-Butyl acrylate (tBA) and Poly(ethylene glycol) dimethacrylate (PEGDMA) ratios.
  • Characterized SMPs using Dynamic Mechanical Analysis (DMA), contact angle measurements, and Atomic Force Microscopy (AFM).
  • Assessed Human Umbilical Vein Endothelial Cell (HUVEC) attachment, viability, and metabolic activity via fluorescent assays.

Main Results:

  • Endothelial cells showed preferential attachment to SMPs with higher tBA content.
  • SMPs with higher tBA content exhibited rougher and more hydrophobic surfaces.
  • Increased HUVEC metabolic activity was observed on high tBA content SMPs.

Conclusions:

  • SMPs with higher tBA content promote endothelial cell attachment and activity.
  • Surface properties, specifically roughness and hydrophobicity, influence endothelialization.
  • These SMPs show promise for developing next-generation blood-contacting biomedical devices.