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Related Experiment Videos

Endothelial cell viability in the rat aortic wall.

J P Christy1, F M Lupinetti, A H Mardan

  • 1Department of Surgery, University of Iowa School of Medicine, Iowa City.

The Annals of Thoracic Surgery
|February 1, 1991
PubMed
Summary

Endothelial cell viability in aortic allografts decreases over time during storage. This study demonstrates a method to measure cell viability, crucial for assessing graft storage methods.

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Area of Science:

  • Vascular Biology
  • Tissue Engineering
  • Biomaterials Science

Background:

  • Aortic allografts are alternatives to prosthetic materials for aortic valve procedures.
  • Endothelial cell viability is critical for the long-term success of allografts.

Purpose of the Study:

  • To assess endothelial cell viability in rat aortic allografts after varying storage durations.
  • To establish a flow cytometry method for quantifying endothelial cell viability.

Main Methods:

  • Rat aortic conduits underwent collagenase digestion to isolate endothelial cells.
  • Cells were labeled with Griffonia simplicifolia agglutinin-fluorescein isothiocyanate (GSA-FITC) and propidium iodide.
  • Flow cytometry quantified viable cells (GSA-FITC positive, propidium iodide negative).

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Main Results:

  • Endothelial cell viability progressively declined with storage duration at 4°C.
  • Storage periods ranged from 3 to 21 days.
  • A clear correlation between storage time and reduced cell viability was observed.

Conclusions:

  • Flow cytometry provides a reliable method for measuring endothelial cell viability in aortic allografts.
  • Prolonged storage of aortic allografts at 4°C in nutrient medium leads to a decrease in endothelial cell viability.
  • These findings have implications for optimizing allograft storage protocols.