A biodegradable, acellular xenogeneic scaffold for regeneration of the vocal fold lamina propria.
Tissue Eng
; 13(3): 551-66, 2007 Mar.
Article
in En
| MEDLINE
| ID: mdl-17518602
ABSTRACT
A novel method for preparing an acellular xenogeneic extracellular matrix scaffold for tissue engineering was developed. Bovine vocal fold lamina propria specimens were treated with high-concentration sodium chloride, nucleic acid digestion, and ethanol dehydration for decellularization and removal of immunogenic foreign epitopes. Human vocal fold fibroblasts from primary culture were seeded onto the acellular scaffolds and cultured for 21 days. The decellularized and the recellularized scaffolds were examined by light microscopy, fluorescent microscopy, and scanning electron microscopy. Collagen synthesis and release by fibroblasts were quantified by the Sircol assay, whereas the synthesis and release of hyaluronic acid, decorin, and fibronectin were assessed by enzyme-linked immunosorbent assays. Viscoelastic shear properties of the scaffolds were quantified by a simple-shear rheometer at frequencies of up to 250 Hz. Preliminary results showed that a biodegradable, acellular extracellular matrix scaffold with an intact basement membrane and 3-dimensional structure of the matrix proteins was engineered. Vocal fold fibroblasts readily attached to and infiltrated the scaffold with high viability and active protein synthesis, demonstrating the biocompatibility. The elastic shear modulus and dynamic viscosity of the acellular scaffold and the fibroblast-repopulated scaffold were comparable to those of the human vocal fold cover. These findings support the potential of the scaffold as a xenograft for vocal fold reconstruction and regeneration.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Regeneration
/
Vocal Cords
/
Biocompatible Materials
/
Absorbable Implants
Limits:
Animals
/
Female
/
Humans
/
Male
Language:
En
Journal:
Tissue Eng
Journal subject:
BIOTECNOLOGIA
/
HISTOLOGIA
Year:
2007
Document type:
Article
Affiliation country:
United States