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Related Concept Videos

Larynx01:21

Larynx

The human larynx, often referred to as the voice box, is an intricate organ located in the neck. It serves as a pathway for air to enter the lungs during respiration and is an essential component of voice production.
Anatomy of the Larynx
The larynx consists of various components, including cartilage, muscles, and vocal cords. Its structure includes three large unpaired cartilages—the thyroid, cricoid, and epiglottis—and three smaller paired cartilages—the arytenoids, corniculates, and...

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Construction and Characterization of a Novel Vocal Fold Bioreactor
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Development of bioengineered human larynx.

Silvia Baiguera1, Alessandro Gonfiotti, Massimo Jaus

  • 1BIOAIRLab, University Hospital Careggi, Florence, Italy.

Biomaterials
|April 9, 2011
PubMed
Summary

Bioengineered human larynx scaffolds offer a promising alternative to allotransplantation. These decellularized scaffolds retain native structure and promote new blood vessel growth, potentially reducing the need for immunosuppression in patients.

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Area of Science:

  • Regenerative Medicine
  • Biomaterials Science
  • Tissue Engineering

Background:

  • Laryngeal allotransplantation is limited, requiring lifelong immunosuppression.
  • A bioengineered larynx could provide an alternative to transplantation.
  • Current alternatives face challenges in functionality and patient outcomes.

Purpose of the Study:

  • To develop a bioengineered human laryngeal scaffold using decellularization.
  • To assess the structural integrity and biomechanical properties of the decellularized scaffolds.
  • To evaluate the angiogenic potential of the laryngeal scaffolds in vivo.

Main Methods:

  • Enzymatic decellularization of human larynxes to create acellular matrices.
  • Histological and molecular analyses to confirm removal of cellular and nuclear material.
  • Scanning electron microscopy (SEM) and mechanical testing to evaluate scaffold structure and biomechanics.
  • Immunohistochemical staining and Chorioallantoic Membrane (CAM) assay to assess angiogenic potential.

Main Results:

  • Decellularization successfully removed all cellular components and nuclear material.
  • Acellular matrices retained the hierarchical structure of the native larynx.
  • Decellularization did not significantly impair the biomechanical properties of the scaffolds.
  • Scaffolds demonstrated residual angiogenic factors and induced significant in vivo angiogenesis.

Conclusions:

  • A clinically relevant method for producing bioengineered laryngeal scaffolds has been established.
  • These decellularized scaffolds maintain structural and mechanical integrity.
  • The angiogenic potential of these scaffolds suggests suitability for partial or total laryngeal implantation.
  • This approach may offer a viable alternative to laryngeal allotransplantation, potentially avoiding lifelong immunosuppression.