Impact of different intratracheal flows during lung decellularization on extracellular matrix composition and mechanics

Author:

Bellezzia Mariana Alves12,Cruz Fernanda F12,Martins Vanessa13,de Castro Lígia Lins12,Lopes-Pacheco Miquéias12,Vilanova Eduardo Prata4,Mourão Paulo A4,Rocco Patricia RM12,Silva Pedro L12

Affiliation:

1. Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, RJ, Brazil

2. National Institute of Science & Technology for Regenerative Medicine, Rio de Janeiro, RJ, Brazil

3. Laboratory of Histomorphometry & Lung Genomics, University of São Paulo Faculty of Medicine, São Paulo, SP, Brazil

4. Glycobiology Program, Leopoldo de Meis Medical Biochemistry Institute, Connective Tissue Laboratory, Clementino Fraga Filho University Hospital, Federal University of Rio de Janeiro, RJ, Brazil

Abstract

Aim: To evaluate different intratracheal flow rates on extracellular matrix content and lung mechanics in an established lung decellularization protocol. Materials & methods: Healthy mice were used: 15 for decellularization and five to serve as controls. Fluids were instilled at 5, 10 and 20 ml/min flow rates through tracheal cannula and right ventricular cavity (0.5 ml/min) in all groups. Results: The 20 ml/min rate better preserved collagen content in decellularized lungs. Elastic fiber content decreased at 5 and 10 ml/min, but not at 20 ml/min, compared with controls. Chondroitin, heparan and dermatan content was reduced after decellularization. Conclusion: An intratracheal flow rate of 20 ml/min was associated with lower resistance and greater preservation of collagen to that observed in ex vivo control lungs.

Publisher

Future Medicine Ltd

Subject

Embryology,Biomedical Engineering

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