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Stem cell-derived tissue-engineered constructs for hemilaryngeal reconstruction.

Stacey L Halum1, Khadijeh Bijangi-Vishehsaraei, Hongji Zhang

  • 1Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine (Halum, Bijangi-Vishehsaraei, Zhang, Sowinski), Indianapolis, Indiana.

The Annals of Otology, Rhinology, and Laryngology
|February 28, 2014
PubMed
Summary
This summary is machine-generated.

Tissue-engineered larynx reconstruction shows promise. Constructs expressing motor end plates before implantation resulted in more innervated and viable muscle for hemilaryngeal repair.

Keywords:
muscle progenitor cellmuscle stem cellreconstructionscaffoldtissue-engineered implant

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Area of Science:

  • Regenerative Medicine
  • Biomaterials Science
  • Tissue Engineering

Background:

  • Developing a fully tissue-engineered larynx is a significant goal in reconstructive medicine.
  • Hemilaryngeal reconstruction presents unique challenges due to the complex structure and function of the larynx.

Purpose of the Study:

  • To compare three strategies for creating tissue-engineered muscle-polymer constructs for hemilaryngeal reconstruction.
  • To evaluate the efficacy of different muscle progenitor cell sources and pre-implantation modifications.

Main Methods:

  • Poly(D,L-lactide-co-ε-caprolactone) (PCL) scaffolds were fabricated using electrospinning.
  • Muscle progenitor cells were cultured and differentiated into various forms (muscle stem cells, myotubes, motor end plate-expressing muscle).
  • Constructs were implanted into hemilaryngeal defects in F344 rats, with PCL alone serving as controls.

Main Results:

  • All animals survived the 1-month study period with adequate weight gain.
  • Constructs pre-engineered with motor end plates demonstrated superior muscle thickness and innervation.
  • Electromyography and immunohistochemistry confirmed enhanced nerve contact with motor end plates.

Conclusions:

  • Pre-implantation motor end plate expression in tissue-engineered muscle-PCL constructs significantly improves muscle innervation and viability.
  • This approach holds potential for developing functional tissue-engineered laryngeal replacements.
  • Further research is warranted to advance towards a complete tissue-engineered larynx.