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Preparation of ex vivo-based biomaterials using convective flow decellularization
Carolina Villegas Montoya1, Peter S McFetridge
1School of Chemical, Biological, and Materials Engineering, University of Oklahoma, Norman, Oklahoma 73019-1004, USA.
Tissue Engineering. Part C, Methods
|February 7, 2009
Summary
A novel convective flow model significantly improved decellularization of ex vivo tissues compared to traditional agitation. This enhanced method removes more cellular material, paving the way for more immune-compliant tissue engineering scaffolds.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Ex vivo tissues offer promising biomechanical properties for tissue engineering scaffolds.
- Decellularization is crucial to minimize immune rejection of these biomaterials.
- Existing decellularization methods, like rotary agitation, may be insufficient.
Purpose of the Study:
- To evaluate a convective flow model for enhanced decellularization of ex vivo tissues.
- To compare the efficacy of convective flow against traditional rotary agitation.
Main Methods:
- Human umbilical veins were decellularized using rotary agitation and convective flow at varying pressures (5, 50, 150mmHg).
- Phospholipid and total protein extraction were quantified over time.
- Histology, SEM, and tensile testing assessed tissue integrity and cellular removal.
Main Results:
- Convective flow systems completely removed cells within 72 hours, unlike rotary agitation.
- The convective flow method demonstrated superior phospholipid and total protein removal.
- Optimal phospholipid extraction occurred at 150mmHg, while 50mmHg yielded more efficient protein extraction.
Conclusions:
- Convective flow significantly enhances decellularization efficiency compared to rotary agitation.
- Pressure-dependent extraction rates highlight the importance of optimizing parameters for different tissue types.
- Improved decellularization using convective flow can lead to more immune-compliant biomaterials for tissue engineering.
