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Related Experiment Video

Updated: Mar 6, 2026

Decellularization of Whole Human Heart Inside a Pressurized Pouch in an Inverted Orientation
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Tissue compliance characterization for human umbilical arteries after decellularization.

Kun Gou1, Jin-Jia Hu2, Seungik Baek3

  • 1Department of Computational, Engineering, and Mathematical Sciences, Texas A&M University-San Antonio, San Antonio, TX, USA.

Journal of the Mechanical Behavior of Biomedical Materials
|March 4, 2026
PubMed
Summary

Decellularization of human umbilical arteries (HUAs) for vascular grafts slightly decreases compliance. Stored strain energy better reflects mechanical changes than compliance during graft preparation.

Keywords:
DecellularizationParameter fittingTissue damageUmbilical arteryVascular graft

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Area of Science:

  • Biomaterials Science
  • Vascular Tissue Engineering
  • Biomedical Engineering

Background:

  • Human umbilical arteries (HUAs) are suitable for small-diameter vascular grafts due to their native mechanical properties.
  • Decellularization of HUAs is necessary to reduce immunogenicity and improve host tissue integration.
  • Understanding mechanical changes in decellularized HUAs (Dec-HUAs) is crucial for graft compatibility.

Purpose of the Study:

  • To characterize mechanical alterations in HUAs after decellularization.
  • To evaluate the effectiveness of a hyperelastic damage model in assessing these changes.
  • To compare the sensitivity of different mechanical indices to decellularization-induced modifications.

Main Methods:

  • Mechanical characterization of five HUA samples after abluminal layer removal and decellularization.
  • Modeling mechanical response using a modified hyperelastic damage framework with isotropic and anisotropic parameters.
  • Parameter estimation via an improved fitting approach and statistical analysis of mechanical properties.

Main Results:

  • Decellularized HUAs (Dec-HUAs) exhibited reduced compliance compared to native HUAs.
  • Abluminal layer removal increased compliance, while decellularization caused a mild decrease.
  • Stored strain energy (W) was a more sensitive indicator of compliance changes than compliance (C) during graft preparation.

Conclusions:

  • Decellularization induces significant, albeit mild, alterations in the mechanical properties of HUAs.
  • The developed hyperelastic damage framework provides a robust method for assessing vessel mechanics.
  • This framework supports the development of mechanically compatible and durable vascular grafts.