Effects of freezing/thawing on the mechanical properties of decellularized lungs.
J Biomed Mater Res A
; 102(2): 413-9, 2014 Feb.
Article
em En
| MEDLINE
| ID: mdl-23533110
ABSTRACT
Lung bioengineering based on decellularized organ scaffolds is a potential alternative for transplantation. Freezing/thawing, a usual procedure in organ decellularization and storage could modify the mechanical properties of the lung scaffold and reduce the performance of the bioengineered lung when subjected to the physiological inflation-deflation breathing cycles. The aim of this study was to determine the effects of repeated freezing/thawing on the mechanical properties of decellularized lungs in the physiological pressure-volume regime associated with normal ventilation. Fifteen mice lungs (C57BL/6) were decellularized using a conventional protocol not involving organ freezing and based on sodium dodecyl sulfate detergent. Subsequently, the mechanical properties of the acellular lungs were measured before and after subjecting them to three consecutive cycles of freezing/thawing. The resistance (RL ) and elastance (EL ) of the decellularized lungs were computed by linear regression fitting of the recorded signals (tracheal pressure, flow, and volume) during mechanical ventilation. RL was not significantly modified by freezing-thawing from 0.88 ± 0.37 to 0.90 ± 0.38 cmH2 O·s·mL(-1) (mean ± SE). EL slightly increased from 64.4 ± 11.1 to 73.0 ± 16.3 cmH2 O·mL(-1) after the three freeze-thaw cycles (p = 0.0013). In conclusion, the freezing/thawing process that is commonly used for both organ decellularization and storage induces only minor changes in the ventilation mechanical properties of the organ scaffold.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Dodecilsulfato de Sódio
/
Alicerces Teciduais
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Congelamento
/
Pulmão
Limite:
Animals
Idioma:
En
Revista:
J Biomed Mater Res A
Ano de publicação:
2014
Tipo de documento:
Article