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Fibrin gel enhanced trilayer structure in cell-cultured constructs.

Yuriy Snyder1, Soumen Jana1

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Fibrin gel significantly improved cell growth and extracellular matrix production on polycaprolactone (PCL) substrates for heart valve tissue engineering. This approach enhances cell orientation and tissue development, creating native-like leaflet constructs.

Keywords:
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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Regenerative Medicine

Background:

  • Optimizing cell seeding and substrate support is crucial for effective tissue engineering, particularly for heart valve development.
  • Fibrin gel offers potential as a cell carrier, enhancing cell adhesion, interaction, and growth within engineered scaffolds.
  • Trilayer polycaprolactone (PCL) substrates mimic native heart valve leaflet structure, providing a foundation for tissue regeneration.

Purpose of the Study:

  • To evaluate the efficacy of fibrin gel as a cell carrier in enhancing valvular interstitial cell proliferation and extracellular matrix production.
  • To assess the impact of fibrin gel on cell orientation and tissue development within trilayer PCL substrates.
  • To determine the suitability of this combined approach for creating functional, native-like heart valve leaflet constructs.

Main Methods:

  • Valvular interstitial cells were seeded onto trilayer PCL substrates using fibrin gel as a cell carrier.
  • Cell-cultured constructs were maintained in vitro for one month.
  • Cell proliferation, vimentin expression, and extracellular matrix (collagen, glycosaminoglycan) production were analyzed.

Main Results:

  • Fibrin gel significantly enhanced cellular proliferation and vimentin expression.
  • Increased production of collagen and glycosaminoglycan was observed in the presence of fibrin gel.
  • Fibrin gel improved cell and tissue material orientation within the PCL substrates, enhancing construct structure and mechanical properties.

Conclusions:

  • Fibrin gel serves as an effective cell carrier for enhancing cell growth and extracellular matrix deposition in tissue-engineered heart valve constructs.
  • The combination of fibrin gel and trilayer PCL substrates promotes native-like cell organization and tissue development.
  • This strategy holds significant promise for the development of functional tissue-engineered heart valve leaflets.