Development of a porcine acellular bladder matrix for tissue-engineered bladder reconstruction
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Read the article on link.springer.com ↗Article · Mar 2022 · 1 min read
In brief
In brief
Researchers developed a porcine-derived acellular bladder matrix using dynamic detergent-enzymatic decellularization as an alternative to enterocystoplasty for bladder augmentation. The resulting scaffold preserved extracellular architecture, demonstrated enhanced biomechanical properties and angiogenic potential, and maintained urodynamic compliance, suggesting promise for tissue-engineered bladder reconstruction in clinical applications.
Written by the GCMD Library team from the article.
Abstract
Purpose
Enterocystoplasty is adopted for patients requiring bladder augmentation, but significant long-term complications highlight need for alternatives. We established a protocol for creating a natural-derived bladder extracellular matrix (BEM) for developing tissue-engineered bladder, and investigated its structural and functional characteristics.
Methods
Porcine bladders were de-cellularised with a dynamic detergent–enzymatic treatment using peristaltic infusion. Samples and fresh controls were evaluated using histological staining, ultrastructure (electron microscopy), collagen, glycosaminoglycans and DNA quantification and biomechanical testing. Compliance and angiogenic properties (Chicken chorioallantoic membrane [CAM] assay) were evaluated. T test compared stiffness and glycosaminoglycans, collagen and DNA quantity. p value of < 0.05 was regarded as significant.
Results
Histological evaluation demonstrated absence of cells with preservation of tissue matrix architecture (collagen and elastin). DNA was 0.01 μg/mg, significantly reduced compared to fresh tissue 0.13 μg/mg (p < 0.01). BEM had increased tensile strength (0.259 ± 0.022 vs 0.116 ± 0.006, respectively, p < 0.0001) and stiffness (0.00075 ± 0.00016 vs 0.00726 ± 0.00216, p = 0.011). CAM assay showed significantly increased number of convergent allantoic vessels after 6 days compared to day 1 (p < 0.01). Urodynamic studies showed that BEM maintains or increases capacity and compliance.
Conclusion
Dynamic detergent–enzymatic treatment produces a BEM which retains structural characteristics, increases strength and stiffness and is more compliant than native tissue. Furthermore, BEM shows angiogenic potential. These data suggest the use of BEM for development of tissue-engineered bladder for patients requiring bladder augmentation.